Commit | Line | Data |
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1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-core.c - helper library for ATA |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from http://www.t13.org/ and | |
31 | * http://www.sata-io.org/ | |
32 | * | |
92c52c52 AC |
33 | * Standards documents from: |
34 | * http://www.t13.org (ATA standards, PCI DMA IDE spec) | |
35 | * http://www.t10.org (SCSI MMC - for ATAPI MMC) | |
36 | * http://www.sata-io.org (SATA) | |
37 | * http://www.compactflash.org (CF) | |
38 | * http://www.qic.org (QIC157 - Tape and DSC) | |
39 | * http://www.ce-ata.org (CE-ATA: not supported) | |
40 | * | |
1da177e4 LT |
41 | */ |
42 | ||
1da177e4 LT |
43 | #include <linux/kernel.h> |
44 | #include <linux/module.h> | |
45 | #include <linux/pci.h> | |
46 | #include <linux/init.h> | |
47 | #include <linux/list.h> | |
48 | #include <linux/mm.h> | |
49 | #include <linux/highmem.h> | |
50 | #include <linux/spinlock.h> | |
51 | #include <linux/blkdev.h> | |
52 | #include <linux/delay.h> | |
53 | #include <linux/timer.h> | |
54 | #include <linux/interrupt.h> | |
55 | #include <linux/completion.h> | |
56 | #include <linux/suspend.h> | |
57 | #include <linux/workqueue.h> | |
67846b30 | 58 | #include <linux/jiffies.h> |
378f058c | 59 | #include <linux/scatterlist.h> |
2dcb407e | 60 | #include <linux/io.h> |
1da177e4 | 61 | #include <scsi/scsi.h> |
193515d5 | 62 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
63 | #include <scsi/scsi_host.h> |
64 | #include <linux/libata.h> | |
1da177e4 LT |
65 | #include <asm/semaphore.h> |
66 | #include <asm/byteorder.h> | |
140b5e59 | 67 | #include <linux/cdrom.h> |
1da177e4 LT |
68 | |
69 | #include "libata.h" | |
70 | ||
fda0efc5 | 71 | |
d7bb4cc7 | 72 | /* debounce timing parameters in msecs { interval, duration, timeout } */ |
e9c83914 TH |
73 | const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; |
74 | const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; | |
75 | const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; | |
d7bb4cc7 | 76 | |
3373efd8 TH |
77 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
78 | u16 heads, u16 sectors); | |
79 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev); | |
218f3d30 JG |
80 | static unsigned int ata_dev_set_feature(struct ata_device *dev, |
81 | u8 enable, u8 feature); | |
3373efd8 | 82 | static void ata_dev_xfermask(struct ata_device *dev); |
75683fe7 | 83 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev); |
1da177e4 | 84 | |
f3187195 | 85 | unsigned int ata_print_id = 1; |
1da177e4 LT |
86 | static struct workqueue_struct *ata_wq; |
87 | ||
453b07ac TH |
88 | struct workqueue_struct *ata_aux_wq; |
89 | ||
418dc1f5 | 90 | int atapi_enabled = 1; |
1623c81e JG |
91 | module_param(atapi_enabled, int, 0444); |
92 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); | |
93 | ||
95de719a AL |
94 | int atapi_dmadir = 0; |
95 | module_param(atapi_dmadir, int, 0444); | |
96 | MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); | |
97 | ||
baf4fdfa ML |
98 | int atapi_passthru16 = 1; |
99 | module_param(atapi_passthru16, int, 0444); | |
100 | MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)"); | |
101 | ||
c3c013a2 JG |
102 | int libata_fua = 0; |
103 | module_param_named(fua, libata_fua, int, 0444); | |
104 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); | |
105 | ||
2dcb407e | 106 | static int ata_ignore_hpa; |
1e999736 AC |
107 | module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); |
108 | MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); | |
109 | ||
b3a70601 AC |
110 | static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; |
111 | module_param_named(dma, libata_dma_mask, int, 0444); | |
112 | MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); | |
113 | ||
a8601e5f AM |
114 | static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; |
115 | module_param(ata_probe_timeout, int, 0444); | |
116 | MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); | |
117 | ||
6ebe9d86 | 118 | int libata_noacpi = 0; |
d7d0dad6 | 119 | module_param_named(noacpi, libata_noacpi, int, 0444); |
6ebe9d86 | 120 | MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set"); |
11ef697b | 121 | |
ae8d4ee7 AC |
122 | int libata_allow_tpm = 0; |
123 | module_param_named(allow_tpm, libata_allow_tpm, int, 0444); | |
124 | MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands"); | |
125 | ||
1da177e4 LT |
126 | MODULE_AUTHOR("Jeff Garzik"); |
127 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
128 | MODULE_LICENSE("GPL"); | |
129 | MODULE_VERSION(DRV_VERSION); | |
130 | ||
0baab86b | 131 | |
1da177e4 LT |
132 | /** |
133 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
134 | * @tf: Taskfile to convert | |
1da177e4 | 135 | * @pmp: Port multiplier port |
9977126c TH |
136 | * @is_cmd: This FIS is for command |
137 | * @fis: Buffer into which data will output | |
1da177e4 LT |
138 | * |
139 | * Converts a standard ATA taskfile to a Serial ATA | |
140 | * FIS structure (Register - Host to Device). | |
141 | * | |
142 | * LOCKING: | |
143 | * Inherited from caller. | |
144 | */ | |
9977126c | 145 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) |
1da177e4 | 146 | { |
9977126c TH |
147 | fis[0] = 0x27; /* Register - Host to Device FIS */ |
148 | fis[1] = pmp & 0xf; /* Port multiplier number*/ | |
149 | if (is_cmd) | |
150 | fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ | |
151 | ||
1da177e4 LT |
152 | fis[2] = tf->command; |
153 | fis[3] = tf->feature; | |
154 | ||
155 | fis[4] = tf->lbal; | |
156 | fis[5] = tf->lbam; | |
157 | fis[6] = tf->lbah; | |
158 | fis[7] = tf->device; | |
159 | ||
160 | fis[8] = tf->hob_lbal; | |
161 | fis[9] = tf->hob_lbam; | |
162 | fis[10] = tf->hob_lbah; | |
163 | fis[11] = tf->hob_feature; | |
164 | ||
165 | fis[12] = tf->nsect; | |
166 | fis[13] = tf->hob_nsect; | |
167 | fis[14] = 0; | |
168 | fis[15] = tf->ctl; | |
169 | ||
170 | fis[16] = 0; | |
171 | fis[17] = 0; | |
172 | fis[18] = 0; | |
173 | fis[19] = 0; | |
174 | } | |
175 | ||
176 | /** | |
177 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
178 | * @fis: Buffer from which data will be input | |
179 | * @tf: Taskfile to output | |
180 | * | |
e12a1be6 | 181 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
182 | * |
183 | * LOCKING: | |
184 | * Inherited from caller. | |
185 | */ | |
186 | ||
057ace5e | 187 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
188 | { |
189 | tf->command = fis[2]; /* status */ | |
190 | tf->feature = fis[3]; /* error */ | |
191 | ||
192 | tf->lbal = fis[4]; | |
193 | tf->lbam = fis[5]; | |
194 | tf->lbah = fis[6]; | |
195 | tf->device = fis[7]; | |
196 | ||
197 | tf->hob_lbal = fis[8]; | |
198 | tf->hob_lbam = fis[9]; | |
199 | tf->hob_lbah = fis[10]; | |
200 | ||
201 | tf->nsect = fis[12]; | |
202 | tf->hob_nsect = fis[13]; | |
203 | } | |
204 | ||
8cbd6df1 AL |
205 | static const u8 ata_rw_cmds[] = { |
206 | /* pio multi */ | |
207 | ATA_CMD_READ_MULTI, | |
208 | ATA_CMD_WRITE_MULTI, | |
209 | ATA_CMD_READ_MULTI_EXT, | |
210 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
211 | 0, |
212 | 0, | |
213 | 0, | |
214 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
215 | /* pio */ |
216 | ATA_CMD_PIO_READ, | |
217 | ATA_CMD_PIO_WRITE, | |
218 | ATA_CMD_PIO_READ_EXT, | |
219 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
220 | 0, |
221 | 0, | |
222 | 0, | |
223 | 0, | |
8cbd6df1 AL |
224 | /* dma */ |
225 | ATA_CMD_READ, | |
226 | ATA_CMD_WRITE, | |
227 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
228 | ATA_CMD_WRITE_EXT, |
229 | 0, | |
230 | 0, | |
231 | 0, | |
232 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 233 | }; |
1da177e4 LT |
234 | |
235 | /** | |
8cbd6df1 | 236 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
bd056d7e TH |
237 | * @tf: command to examine and configure |
238 | * @dev: device tf belongs to | |
1da177e4 | 239 | * |
2e9edbf8 | 240 | * Examine the device configuration and tf->flags to calculate |
8cbd6df1 | 241 | * the proper read/write commands and protocol to use. |
1da177e4 LT |
242 | * |
243 | * LOCKING: | |
244 | * caller. | |
245 | */ | |
bd056d7e | 246 | static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) |
1da177e4 | 247 | { |
9a3dccc4 | 248 | u8 cmd; |
1da177e4 | 249 | |
9a3dccc4 | 250 | int index, fua, lba48, write; |
2e9edbf8 | 251 | |
9a3dccc4 | 252 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
253 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
254 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 255 | |
8cbd6df1 AL |
256 | if (dev->flags & ATA_DFLAG_PIO) { |
257 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 258 | index = dev->multi_count ? 0 : 8; |
9af5c9c9 | 259 | } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { |
8d238e01 AC |
260 | /* Unable to use DMA due to host limitation */ |
261 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 262 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
263 | } else { |
264 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 265 | index = 16; |
8cbd6df1 | 266 | } |
1da177e4 | 267 | |
9a3dccc4 TH |
268 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
269 | if (cmd) { | |
270 | tf->command = cmd; | |
271 | return 0; | |
272 | } | |
273 | return -1; | |
1da177e4 LT |
274 | } |
275 | ||
35b649fe TH |
276 | /** |
277 | * ata_tf_read_block - Read block address from ATA taskfile | |
278 | * @tf: ATA taskfile of interest | |
279 | * @dev: ATA device @tf belongs to | |
280 | * | |
281 | * LOCKING: | |
282 | * None. | |
283 | * | |
284 | * Read block address from @tf. This function can handle all | |
285 | * three address formats - LBA, LBA48 and CHS. tf->protocol and | |
286 | * flags select the address format to use. | |
287 | * | |
288 | * RETURNS: | |
289 | * Block address read from @tf. | |
290 | */ | |
291 | u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) | |
292 | { | |
293 | u64 block = 0; | |
294 | ||
295 | if (tf->flags & ATA_TFLAG_LBA) { | |
296 | if (tf->flags & ATA_TFLAG_LBA48) { | |
297 | block |= (u64)tf->hob_lbah << 40; | |
298 | block |= (u64)tf->hob_lbam << 32; | |
299 | block |= tf->hob_lbal << 24; | |
300 | } else | |
301 | block |= (tf->device & 0xf) << 24; | |
302 | ||
303 | block |= tf->lbah << 16; | |
304 | block |= tf->lbam << 8; | |
305 | block |= tf->lbal; | |
306 | } else { | |
307 | u32 cyl, head, sect; | |
308 | ||
309 | cyl = tf->lbam | (tf->lbah << 8); | |
310 | head = tf->device & 0xf; | |
311 | sect = tf->lbal; | |
312 | ||
313 | block = (cyl * dev->heads + head) * dev->sectors + sect; | |
314 | } | |
315 | ||
316 | return block; | |
317 | } | |
318 | ||
bd056d7e TH |
319 | /** |
320 | * ata_build_rw_tf - Build ATA taskfile for given read/write request | |
321 | * @tf: Target ATA taskfile | |
322 | * @dev: ATA device @tf belongs to | |
323 | * @block: Block address | |
324 | * @n_block: Number of blocks | |
325 | * @tf_flags: RW/FUA etc... | |
326 | * @tag: tag | |
327 | * | |
328 | * LOCKING: | |
329 | * None. | |
330 | * | |
331 | * Build ATA taskfile @tf for read/write request described by | |
332 | * @block, @n_block, @tf_flags and @tag on @dev. | |
333 | * | |
334 | * RETURNS: | |
335 | * | |
336 | * 0 on success, -ERANGE if the request is too large for @dev, | |
337 | * -EINVAL if the request is invalid. | |
338 | */ | |
339 | int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, | |
340 | u64 block, u32 n_block, unsigned int tf_flags, | |
341 | unsigned int tag) | |
342 | { | |
343 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
344 | tf->flags |= tf_flags; | |
345 | ||
6d1245bf | 346 | if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
bd056d7e TH |
347 | /* yay, NCQ */ |
348 | if (!lba_48_ok(block, n_block)) | |
349 | return -ERANGE; | |
350 | ||
351 | tf->protocol = ATA_PROT_NCQ; | |
352 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
353 | ||
354 | if (tf->flags & ATA_TFLAG_WRITE) | |
355 | tf->command = ATA_CMD_FPDMA_WRITE; | |
356 | else | |
357 | tf->command = ATA_CMD_FPDMA_READ; | |
358 | ||
359 | tf->nsect = tag << 3; | |
360 | tf->hob_feature = (n_block >> 8) & 0xff; | |
361 | tf->feature = n_block & 0xff; | |
362 | ||
363 | tf->hob_lbah = (block >> 40) & 0xff; | |
364 | tf->hob_lbam = (block >> 32) & 0xff; | |
365 | tf->hob_lbal = (block >> 24) & 0xff; | |
366 | tf->lbah = (block >> 16) & 0xff; | |
367 | tf->lbam = (block >> 8) & 0xff; | |
368 | tf->lbal = block & 0xff; | |
369 | ||
370 | tf->device = 1 << 6; | |
371 | if (tf->flags & ATA_TFLAG_FUA) | |
372 | tf->device |= 1 << 7; | |
373 | } else if (dev->flags & ATA_DFLAG_LBA) { | |
374 | tf->flags |= ATA_TFLAG_LBA; | |
375 | ||
376 | if (lba_28_ok(block, n_block)) { | |
377 | /* use LBA28 */ | |
378 | tf->device |= (block >> 24) & 0xf; | |
379 | } else if (lba_48_ok(block, n_block)) { | |
380 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
381 | return -ERANGE; | |
382 | ||
383 | /* use LBA48 */ | |
384 | tf->flags |= ATA_TFLAG_LBA48; | |
385 | ||
386 | tf->hob_nsect = (n_block >> 8) & 0xff; | |
387 | ||
388 | tf->hob_lbah = (block >> 40) & 0xff; | |
389 | tf->hob_lbam = (block >> 32) & 0xff; | |
390 | tf->hob_lbal = (block >> 24) & 0xff; | |
391 | } else | |
392 | /* request too large even for LBA48 */ | |
393 | return -ERANGE; | |
394 | ||
395 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
396 | return -EINVAL; | |
397 | ||
398 | tf->nsect = n_block & 0xff; | |
399 | ||
400 | tf->lbah = (block >> 16) & 0xff; | |
401 | tf->lbam = (block >> 8) & 0xff; | |
402 | tf->lbal = block & 0xff; | |
403 | ||
404 | tf->device |= ATA_LBA; | |
405 | } else { | |
406 | /* CHS */ | |
407 | u32 sect, head, cyl, track; | |
408 | ||
409 | /* The request -may- be too large for CHS addressing. */ | |
410 | if (!lba_28_ok(block, n_block)) | |
411 | return -ERANGE; | |
412 | ||
413 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
414 | return -EINVAL; | |
415 | ||
416 | /* Convert LBA to CHS */ | |
417 | track = (u32)block / dev->sectors; | |
418 | cyl = track / dev->heads; | |
419 | head = track % dev->heads; | |
420 | sect = (u32)block % dev->sectors + 1; | |
421 | ||
422 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", | |
423 | (u32)block, track, cyl, head, sect); | |
424 | ||
425 | /* Check whether the converted CHS can fit. | |
426 | Cylinder: 0-65535 | |
427 | Head: 0-15 | |
428 | Sector: 1-255*/ | |
429 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
430 | return -ERANGE; | |
431 | ||
432 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
433 | tf->lbal = sect; | |
434 | tf->lbam = cyl; | |
435 | tf->lbah = cyl >> 8; | |
436 | tf->device |= head; | |
437 | } | |
438 | ||
439 | return 0; | |
440 | } | |
441 | ||
cb95d562 TH |
442 | /** |
443 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
444 | * @pio_mask: pio_mask | |
445 | * @mwdma_mask: mwdma_mask | |
446 | * @udma_mask: udma_mask | |
447 | * | |
448 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
449 | * unsigned int xfer_mask. | |
450 | * | |
451 | * LOCKING: | |
452 | * None. | |
453 | * | |
454 | * RETURNS: | |
455 | * Packed xfer_mask. | |
456 | */ | |
457 | static unsigned int ata_pack_xfermask(unsigned int pio_mask, | |
458 | unsigned int mwdma_mask, | |
459 | unsigned int udma_mask) | |
460 | { | |
461 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
462 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
463 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
464 | } | |
465 | ||
c0489e4e TH |
466 | /** |
467 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
468 | * @xfer_mask: xfer_mask to unpack | |
469 | * @pio_mask: resulting pio_mask | |
470 | * @mwdma_mask: resulting mwdma_mask | |
471 | * @udma_mask: resulting udma_mask | |
472 | * | |
473 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
474 | * Any NULL distination masks will be ignored. | |
475 | */ | |
476 | static void ata_unpack_xfermask(unsigned int xfer_mask, | |
477 | unsigned int *pio_mask, | |
478 | unsigned int *mwdma_mask, | |
479 | unsigned int *udma_mask) | |
480 | { | |
481 | if (pio_mask) | |
482 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
483 | if (mwdma_mask) | |
484 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
485 | if (udma_mask) | |
486 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
487 | } | |
488 | ||
cb95d562 | 489 | static const struct ata_xfer_ent { |
be9a50c8 | 490 | int shift, bits; |
cb95d562 TH |
491 | u8 base; |
492 | } ata_xfer_tbl[] = { | |
493 | { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, | |
494 | { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, | |
495 | { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, | |
496 | { -1, }, | |
497 | }; | |
498 | ||
499 | /** | |
500 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
501 | * @xfer_mask: xfer_mask of interest | |
502 | * | |
503 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
504 | * bit of @xfer_mask is considered. | |
505 | * | |
506 | * LOCKING: | |
507 | * None. | |
508 | * | |
509 | * RETURNS: | |
510 | * Matching XFER_* value, 0 if no match found. | |
511 | */ | |
512 | static u8 ata_xfer_mask2mode(unsigned int xfer_mask) | |
513 | { | |
514 | int highbit = fls(xfer_mask) - 1; | |
515 | const struct ata_xfer_ent *ent; | |
516 | ||
517 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
518 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
519 | return ent->base + highbit - ent->shift; | |
520 | return 0; | |
521 | } | |
522 | ||
523 | /** | |
524 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
525 | * @xfer_mode: XFER_* of interest | |
526 | * | |
527 | * Return matching xfer_mask for @xfer_mode. | |
528 | * | |
529 | * LOCKING: | |
530 | * None. | |
531 | * | |
532 | * RETURNS: | |
533 | * Matching xfer_mask, 0 if no match found. | |
534 | */ | |
535 | static unsigned int ata_xfer_mode2mask(u8 xfer_mode) | |
536 | { | |
537 | const struct ata_xfer_ent *ent; | |
538 | ||
539 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
540 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
541 | return 1 << (ent->shift + xfer_mode - ent->base); | |
542 | return 0; | |
543 | } | |
544 | ||
545 | /** | |
546 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
547 | * @xfer_mode: XFER_* of interest | |
548 | * | |
549 | * Return matching xfer_shift for @xfer_mode. | |
550 | * | |
551 | * LOCKING: | |
552 | * None. | |
553 | * | |
554 | * RETURNS: | |
555 | * Matching xfer_shift, -1 if no match found. | |
556 | */ | |
557 | static int ata_xfer_mode2shift(unsigned int xfer_mode) | |
558 | { | |
559 | const struct ata_xfer_ent *ent; | |
560 | ||
561 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
562 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
563 | return ent->shift; | |
564 | return -1; | |
565 | } | |
566 | ||
1da177e4 | 567 | /** |
1da7b0d0 TH |
568 | * ata_mode_string - convert xfer_mask to string |
569 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
1da177e4 LT |
570 | * |
571 | * Determine string which represents the highest speed | |
1da7b0d0 | 572 | * (highest bit in @modemask). |
1da177e4 LT |
573 | * |
574 | * LOCKING: | |
575 | * None. | |
576 | * | |
577 | * RETURNS: | |
578 | * Constant C string representing highest speed listed in | |
1da7b0d0 | 579 | * @mode_mask, or the constant C string "<n/a>". |
1da177e4 | 580 | */ |
1da7b0d0 | 581 | static const char *ata_mode_string(unsigned int xfer_mask) |
1da177e4 | 582 | { |
75f554bc TH |
583 | static const char * const xfer_mode_str[] = { |
584 | "PIO0", | |
585 | "PIO1", | |
586 | "PIO2", | |
587 | "PIO3", | |
588 | "PIO4", | |
b352e57d AC |
589 | "PIO5", |
590 | "PIO6", | |
75f554bc TH |
591 | "MWDMA0", |
592 | "MWDMA1", | |
593 | "MWDMA2", | |
b352e57d AC |
594 | "MWDMA3", |
595 | "MWDMA4", | |
75f554bc TH |
596 | "UDMA/16", |
597 | "UDMA/25", | |
598 | "UDMA/33", | |
599 | "UDMA/44", | |
600 | "UDMA/66", | |
601 | "UDMA/100", | |
602 | "UDMA/133", | |
603 | "UDMA7", | |
604 | }; | |
1da7b0d0 | 605 | int highbit; |
1da177e4 | 606 | |
1da7b0d0 TH |
607 | highbit = fls(xfer_mask) - 1; |
608 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
609 | return xfer_mode_str[highbit]; | |
1da177e4 | 610 | return "<n/a>"; |
1da177e4 LT |
611 | } |
612 | ||
4c360c81 TH |
613 | static const char *sata_spd_string(unsigned int spd) |
614 | { | |
615 | static const char * const spd_str[] = { | |
616 | "1.5 Gbps", | |
617 | "3.0 Gbps", | |
618 | }; | |
619 | ||
620 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) | |
621 | return "<unknown>"; | |
622 | return spd_str[spd - 1]; | |
623 | } | |
624 | ||
3373efd8 | 625 | void ata_dev_disable(struct ata_device *dev) |
0b8efb0a | 626 | { |
09d7f9b0 | 627 | if (ata_dev_enabled(dev)) { |
9af5c9c9 | 628 | if (ata_msg_drv(dev->link->ap)) |
09d7f9b0 | 629 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
562f0c2d | 630 | ata_acpi_on_disable(dev); |
4ae72a1e TH |
631 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | |
632 | ATA_DNXFER_QUIET); | |
0b8efb0a TH |
633 | dev->class++; |
634 | } | |
635 | } | |
636 | ||
ca77329f KCA |
637 | static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) |
638 | { | |
639 | struct ata_link *link = dev->link; | |
640 | struct ata_port *ap = link->ap; | |
641 | u32 scontrol; | |
642 | unsigned int err_mask; | |
643 | int rc; | |
644 | ||
645 | /* | |
646 | * disallow DIPM for drivers which haven't set | |
647 | * ATA_FLAG_IPM. This is because when DIPM is enabled, | |
648 | * phy ready will be set in the interrupt status on | |
649 | * state changes, which will cause some drivers to | |
650 | * think there are errors - additionally drivers will | |
651 | * need to disable hot plug. | |
652 | */ | |
653 | if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) { | |
654 | ap->pm_policy = NOT_AVAILABLE; | |
655 | return -EINVAL; | |
656 | } | |
657 | ||
658 | /* | |
659 | * For DIPM, we will only enable it for the | |
660 | * min_power setting. | |
661 | * | |
662 | * Why? Because Disks are too stupid to know that | |
663 | * If the host rejects a request to go to SLUMBER | |
664 | * they should retry at PARTIAL, and instead it | |
665 | * just would give up. So, for medium_power to | |
666 | * work at all, we need to only allow HIPM. | |
667 | */ | |
668 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); | |
669 | if (rc) | |
670 | return rc; | |
671 | ||
672 | switch (policy) { | |
673 | case MIN_POWER: | |
674 | /* no restrictions on IPM transitions */ | |
675 | scontrol &= ~(0x3 << 8); | |
676 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
677 | if (rc) | |
678 | return rc; | |
679 | ||
680 | /* enable DIPM */ | |
681 | if (dev->flags & ATA_DFLAG_DIPM) | |
682 | err_mask = ata_dev_set_feature(dev, | |
683 | SETFEATURES_SATA_ENABLE, SATA_DIPM); | |
684 | break; | |
685 | case MEDIUM_POWER: | |
686 | /* allow IPM to PARTIAL */ | |
687 | scontrol &= ~(0x1 << 8); | |
688 | scontrol |= (0x2 << 8); | |
689 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
690 | if (rc) | |
691 | return rc; | |
692 | ||
f5456b63 KCA |
693 | /* |
694 | * we don't have to disable DIPM since IPM flags | |
695 | * disallow transitions to SLUMBER, which effectively | |
696 | * disable DIPM if it does not support PARTIAL | |
697 | */ | |
ca77329f KCA |
698 | break; |
699 | case NOT_AVAILABLE: | |
700 | case MAX_PERFORMANCE: | |
701 | /* disable all IPM transitions */ | |
702 | scontrol |= (0x3 << 8); | |
703 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
704 | if (rc) | |
705 | return rc; | |
706 | ||
f5456b63 KCA |
707 | /* |
708 | * we don't have to disable DIPM since IPM flags | |
709 | * disallow all transitions which effectively | |
710 | * disable DIPM anyway. | |
711 | */ | |
ca77329f KCA |
712 | break; |
713 | } | |
714 | ||
715 | /* FIXME: handle SET FEATURES failure */ | |
716 | (void) err_mask; | |
717 | ||
718 | return 0; | |
719 | } | |
720 | ||
721 | /** | |
722 | * ata_dev_enable_pm - enable SATA interface power management | |
48166fd9 SH |
723 | * @dev: device to enable power management |
724 | * @policy: the link power management policy | |
ca77329f KCA |
725 | * |
726 | * Enable SATA Interface power management. This will enable | |
727 | * Device Interface Power Management (DIPM) for min_power | |
728 | * policy, and then call driver specific callbacks for | |
729 | * enabling Host Initiated Power management. | |
730 | * | |
731 | * Locking: Caller. | |
732 | * Returns: -EINVAL if IPM is not supported, 0 otherwise. | |
733 | */ | |
734 | void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy) | |
735 | { | |
736 | int rc = 0; | |
737 | struct ata_port *ap = dev->link->ap; | |
738 | ||
739 | /* set HIPM first, then DIPM */ | |
740 | if (ap->ops->enable_pm) | |
741 | rc = ap->ops->enable_pm(ap, policy); | |
742 | if (rc) | |
743 | goto enable_pm_out; | |
744 | rc = ata_dev_set_dipm(dev, policy); | |
745 | ||
746 | enable_pm_out: | |
747 | if (rc) | |
748 | ap->pm_policy = MAX_PERFORMANCE; | |
749 | else | |
750 | ap->pm_policy = policy; | |
751 | return /* rc */; /* hopefully we can use 'rc' eventually */ | |
752 | } | |
753 | ||
1992a5ed | 754 | #ifdef CONFIG_PM |
ca77329f KCA |
755 | /** |
756 | * ata_dev_disable_pm - disable SATA interface power management | |
48166fd9 | 757 | * @dev: device to disable power management |
ca77329f KCA |
758 | * |
759 | * Disable SATA Interface power management. This will disable | |
760 | * Device Interface Power Management (DIPM) without changing | |
761 | * policy, call driver specific callbacks for disabling Host | |
762 | * Initiated Power management. | |
763 | * | |
764 | * Locking: Caller. | |
765 | * Returns: void | |
766 | */ | |
767 | static void ata_dev_disable_pm(struct ata_device *dev) | |
768 | { | |
769 | struct ata_port *ap = dev->link->ap; | |
770 | ||
771 | ata_dev_set_dipm(dev, MAX_PERFORMANCE); | |
772 | if (ap->ops->disable_pm) | |
773 | ap->ops->disable_pm(ap); | |
774 | } | |
1992a5ed | 775 | #endif /* CONFIG_PM */ |
ca77329f KCA |
776 | |
777 | void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy) | |
778 | { | |
779 | ap->pm_policy = policy; | |
780 | ap->link.eh_info.action |= ATA_EHI_LPM; | |
781 | ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY; | |
782 | ata_port_schedule_eh(ap); | |
783 | } | |
784 | ||
1992a5ed | 785 | #ifdef CONFIG_PM |
ca77329f KCA |
786 | static void ata_lpm_enable(struct ata_host *host) |
787 | { | |
788 | struct ata_link *link; | |
789 | struct ata_port *ap; | |
790 | struct ata_device *dev; | |
791 | int i; | |
792 | ||
793 | for (i = 0; i < host->n_ports; i++) { | |
794 | ap = host->ports[i]; | |
795 | ata_port_for_each_link(link, ap) { | |
796 | ata_link_for_each_dev(dev, link) | |
797 | ata_dev_disable_pm(dev); | |
798 | } | |
799 | } | |
800 | } | |
801 | ||
802 | static void ata_lpm_disable(struct ata_host *host) | |
803 | { | |
804 | int i; | |
805 | ||
806 | for (i = 0; i < host->n_ports; i++) { | |
807 | struct ata_port *ap = host->ports[i]; | |
808 | ata_lpm_schedule(ap, ap->pm_policy); | |
809 | } | |
810 | } | |
1992a5ed | 811 | #endif /* CONFIG_PM */ |
ca77329f KCA |
812 | |
813 | ||
1da177e4 | 814 | /** |
0d5ff566 | 815 | * ata_devchk - PATA device presence detection |
1da177e4 LT |
816 | * @ap: ATA channel to examine |
817 | * @device: Device to examine (starting at zero) | |
818 | * | |
819 | * This technique was originally described in | |
820 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
821 | * later found its way into the ATA/ATAPI spec. | |
822 | * | |
823 | * Write a pattern to the ATA shadow registers, | |
824 | * and if a device is present, it will respond by | |
825 | * correctly storing and echoing back the | |
826 | * ATA shadow register contents. | |
827 | * | |
828 | * LOCKING: | |
829 | * caller. | |
830 | */ | |
831 | ||
0d5ff566 | 832 | static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) |
1da177e4 LT |
833 | { |
834 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
835 | u8 nsect, lbal; | |
836 | ||
837 | ap->ops->dev_select(ap, device); | |
838 | ||
0d5ff566 TH |
839 | iowrite8(0x55, ioaddr->nsect_addr); |
840 | iowrite8(0xaa, ioaddr->lbal_addr); | |
1da177e4 | 841 | |
0d5ff566 TH |
842 | iowrite8(0xaa, ioaddr->nsect_addr); |
843 | iowrite8(0x55, ioaddr->lbal_addr); | |
1da177e4 | 844 | |
0d5ff566 TH |
845 | iowrite8(0x55, ioaddr->nsect_addr); |
846 | iowrite8(0xaa, ioaddr->lbal_addr); | |
1da177e4 | 847 | |
0d5ff566 TH |
848 | nsect = ioread8(ioaddr->nsect_addr); |
849 | lbal = ioread8(ioaddr->lbal_addr); | |
1da177e4 LT |
850 | |
851 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
852 | return 1; /* we found a device */ | |
853 | ||
854 | return 0; /* nothing found */ | |
855 | } | |
856 | ||
1da177e4 LT |
857 | /** |
858 | * ata_dev_classify - determine device type based on ATA-spec signature | |
859 | * @tf: ATA taskfile register set for device to be identified | |
860 | * | |
861 | * Determine from taskfile register contents whether a device is | |
862 | * ATA or ATAPI, as per "Signature and persistence" section | |
863 | * of ATA/PI spec (volume 1, sect 5.14). | |
864 | * | |
865 | * LOCKING: | |
866 | * None. | |
867 | * | |
868 | * RETURNS: | |
633273a3 TH |
869 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or |
870 | * %ATA_DEV_UNKNOWN the event of failure. | |
1da177e4 | 871 | */ |
057ace5e | 872 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
873 | { |
874 | /* Apple's open source Darwin code hints that some devices only | |
875 | * put a proper signature into the LBA mid/high registers, | |
876 | * So, we only check those. It's sufficient for uniqueness. | |
633273a3 TH |
877 | * |
878 | * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate | |
879 | * signatures for ATA and ATAPI devices attached on SerialATA, | |
880 | * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA | |
881 | * spec has never mentioned about using different signatures | |
882 | * for ATA/ATAPI devices. Then, Serial ATA II: Port | |
883 | * Multiplier specification began to use 0x69/0x96 to identify | |
884 | * port multpliers and 0x3c/0xc3 to identify SEMB device. | |
885 | * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and | |
886 | * 0x69/0x96 shortly and described them as reserved for | |
887 | * SerialATA. | |
888 | * | |
889 | * We follow the current spec and consider that 0x69/0x96 | |
890 | * identifies a port multiplier and 0x3c/0xc3 a SEMB device. | |
1da177e4 | 891 | */ |
633273a3 | 892 | if ((tf->lbam == 0) && (tf->lbah == 0)) { |
1da177e4 LT |
893 | DPRINTK("found ATA device by sig\n"); |
894 | return ATA_DEV_ATA; | |
895 | } | |
896 | ||
633273a3 | 897 | if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { |
1da177e4 LT |
898 | DPRINTK("found ATAPI device by sig\n"); |
899 | return ATA_DEV_ATAPI; | |
900 | } | |
901 | ||
633273a3 TH |
902 | if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { |
903 | DPRINTK("found PMP device by sig\n"); | |
904 | return ATA_DEV_PMP; | |
905 | } | |
906 | ||
907 | if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { | |
2dcb407e | 908 | printk(KERN_INFO "ata: SEMB device ignored\n"); |
633273a3 TH |
909 | return ATA_DEV_SEMB_UNSUP; /* not yet */ |
910 | } | |
911 | ||
1da177e4 LT |
912 | DPRINTK("unknown device\n"); |
913 | return ATA_DEV_UNKNOWN; | |
914 | } | |
915 | ||
916 | /** | |
917 | * ata_dev_try_classify - Parse returned ATA device signature | |
3f19859e TH |
918 | * @dev: ATA device to classify (starting at zero) |
919 | * @present: device seems present | |
b4dc7623 | 920 | * @r_err: Value of error register on completion |
1da177e4 LT |
921 | * |
922 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, | |
923 | * an ATA/ATAPI-defined set of values is placed in the ATA | |
924 | * shadow registers, indicating the results of device detection | |
925 | * and diagnostics. | |
926 | * | |
927 | * Select the ATA device, and read the values from the ATA shadow | |
928 | * registers. Then parse according to the Error register value, | |
929 | * and the spec-defined values examined by ata_dev_classify(). | |
930 | * | |
931 | * LOCKING: | |
932 | * caller. | |
b4dc7623 TH |
933 | * |
934 | * RETURNS: | |
935 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. | |
1da177e4 | 936 | */ |
3f19859e TH |
937 | unsigned int ata_dev_try_classify(struct ata_device *dev, int present, |
938 | u8 *r_err) | |
1da177e4 | 939 | { |
3f19859e | 940 | struct ata_port *ap = dev->link->ap; |
1da177e4 LT |
941 | struct ata_taskfile tf; |
942 | unsigned int class; | |
943 | u8 err; | |
944 | ||
3f19859e | 945 | ap->ops->dev_select(ap, dev->devno); |
1da177e4 LT |
946 | |
947 | memset(&tf, 0, sizeof(tf)); | |
948 | ||
1da177e4 | 949 | ap->ops->tf_read(ap, &tf); |
0169e284 | 950 | err = tf.feature; |
b4dc7623 TH |
951 | if (r_err) |
952 | *r_err = err; | |
1da177e4 | 953 | |
93590859 | 954 | /* see if device passed diags: if master then continue and warn later */ |
3f19859e | 955 | if (err == 0 && dev->devno == 0) |
93590859 | 956 | /* diagnostic fail : do nothing _YET_ */ |
3f19859e | 957 | dev->horkage |= ATA_HORKAGE_DIAGNOSTIC; |
93590859 | 958 | else if (err == 1) |
1da177e4 | 959 | /* do nothing */ ; |
3f19859e | 960 | else if ((dev->devno == 0) && (err == 0x81)) |
1da177e4 LT |
961 | /* do nothing */ ; |
962 | else | |
b4dc7623 | 963 | return ATA_DEV_NONE; |
1da177e4 | 964 | |
b4dc7623 | 965 | /* determine if device is ATA or ATAPI */ |
1da177e4 | 966 | class = ata_dev_classify(&tf); |
b4dc7623 | 967 | |
d7fbee05 TH |
968 | if (class == ATA_DEV_UNKNOWN) { |
969 | /* If the device failed diagnostic, it's likely to | |
970 | * have reported incorrect device signature too. | |
971 | * Assume ATA device if the device seems present but | |
972 | * device signature is invalid with diagnostic | |
973 | * failure. | |
974 | */ | |
975 | if (present && (dev->horkage & ATA_HORKAGE_DIAGNOSTIC)) | |
976 | class = ATA_DEV_ATA; | |
977 | else | |
978 | class = ATA_DEV_NONE; | |
979 | } else if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) | |
980 | class = ATA_DEV_NONE; | |
981 | ||
b4dc7623 | 982 | return class; |
1da177e4 LT |
983 | } |
984 | ||
985 | /** | |
6a62a04d | 986 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
987 | * @id: IDENTIFY DEVICE results we will examine |
988 | * @s: string into which data is output | |
989 | * @ofs: offset into identify device page | |
990 | * @len: length of string to return. must be an even number. | |
991 | * | |
992 | * The strings in the IDENTIFY DEVICE page are broken up into | |
993 | * 16-bit chunks. Run through the string, and output each | |
994 | * 8-bit chunk linearly, regardless of platform. | |
995 | * | |
996 | * LOCKING: | |
997 | * caller. | |
998 | */ | |
999 | ||
6a62a04d TH |
1000 | void ata_id_string(const u16 *id, unsigned char *s, |
1001 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
1002 | { |
1003 | unsigned int c; | |
1004 | ||
1005 | while (len > 0) { | |
1006 | c = id[ofs] >> 8; | |
1007 | *s = c; | |
1008 | s++; | |
1009 | ||
1010 | c = id[ofs] & 0xff; | |
1011 | *s = c; | |
1012 | s++; | |
1013 | ||
1014 | ofs++; | |
1015 | len -= 2; | |
1016 | } | |
1017 | } | |
1018 | ||
0e949ff3 | 1019 | /** |
6a62a04d | 1020 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
1021 | * @id: IDENTIFY DEVICE results we will examine |
1022 | * @s: string into which data is output | |
1023 | * @ofs: offset into identify device page | |
1024 | * @len: length of string to return. must be an odd number. | |
1025 | * | |
6a62a04d | 1026 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
1027 | * trims trailing spaces and terminates the resulting string with |
1028 | * null. @len must be actual maximum length (even number) + 1. | |
1029 | * | |
1030 | * LOCKING: | |
1031 | * caller. | |
1032 | */ | |
6a62a04d TH |
1033 | void ata_id_c_string(const u16 *id, unsigned char *s, |
1034 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
1035 | { |
1036 | unsigned char *p; | |
1037 | ||
1038 | WARN_ON(!(len & 1)); | |
1039 | ||
6a62a04d | 1040 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
1041 | |
1042 | p = s + strnlen(s, len - 1); | |
1043 | while (p > s && p[-1] == ' ') | |
1044 | p--; | |
1045 | *p = '\0'; | |
1046 | } | |
0baab86b | 1047 | |
db6f8759 TH |
1048 | static u64 ata_id_n_sectors(const u16 *id) |
1049 | { | |
1050 | if (ata_id_has_lba(id)) { | |
1051 | if (ata_id_has_lba48(id)) | |
1052 | return ata_id_u64(id, 100); | |
1053 | else | |
1054 | return ata_id_u32(id, 60); | |
1055 | } else { | |
1056 | if (ata_id_current_chs_valid(id)) | |
1057 | return ata_id_u32(id, 57); | |
1058 | else | |
1059 | return id[1] * id[3] * id[6]; | |
1060 | } | |
1061 | } | |
1062 | ||
1e999736 AC |
1063 | static u64 ata_tf_to_lba48(struct ata_taskfile *tf) |
1064 | { | |
1065 | u64 sectors = 0; | |
1066 | ||
1067 | sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; | |
1068 | sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; | |
1069 | sectors |= (tf->hob_lbal & 0xff) << 24; | |
1070 | sectors |= (tf->lbah & 0xff) << 16; | |
1071 | sectors |= (tf->lbam & 0xff) << 8; | |
1072 | sectors |= (tf->lbal & 0xff); | |
1073 | ||
1074 | return ++sectors; | |
1075 | } | |
1076 | ||
1077 | static u64 ata_tf_to_lba(struct ata_taskfile *tf) | |
1078 | { | |
1079 | u64 sectors = 0; | |
1080 | ||
1081 | sectors |= (tf->device & 0x0f) << 24; | |
1082 | sectors |= (tf->lbah & 0xff) << 16; | |
1083 | sectors |= (tf->lbam & 0xff) << 8; | |
1084 | sectors |= (tf->lbal & 0xff); | |
1085 | ||
1086 | return ++sectors; | |
1087 | } | |
1088 | ||
1089 | /** | |
c728a914 TH |
1090 | * ata_read_native_max_address - Read native max address |
1091 | * @dev: target device | |
1092 | * @max_sectors: out parameter for the result native max address | |
1e999736 | 1093 | * |
c728a914 TH |
1094 | * Perform an LBA48 or LBA28 native size query upon the device in |
1095 | * question. | |
1e999736 | 1096 | * |
c728a914 TH |
1097 | * RETURNS: |
1098 | * 0 on success, -EACCES if command is aborted by the drive. | |
1099 | * -EIO on other errors. | |
1e999736 | 1100 | */ |
c728a914 | 1101 | static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) |
1e999736 | 1102 | { |
c728a914 | 1103 | unsigned int err_mask; |
1e999736 | 1104 | struct ata_taskfile tf; |
c728a914 | 1105 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
1106 | |
1107 | ata_tf_init(dev, &tf); | |
1108 | ||
c728a914 | 1109 | /* always clear all address registers */ |
1e999736 | 1110 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1e999736 | 1111 | |
c728a914 TH |
1112 | if (lba48) { |
1113 | tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; | |
1114 | tf.flags |= ATA_TFLAG_LBA48; | |
1115 | } else | |
1116 | tf.command = ATA_CMD_READ_NATIVE_MAX; | |
1e999736 | 1117 | |
1e999736 | 1118 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 TH |
1119 | tf.device |= ATA_LBA; |
1120 | ||
2b789108 | 1121 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
c728a914 TH |
1122 | if (err_mask) { |
1123 | ata_dev_printk(dev, KERN_WARNING, "failed to read native " | |
1124 | "max address (err_mask=0x%x)\n", err_mask); | |
1125 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
1126 | return -EACCES; | |
1127 | return -EIO; | |
1128 | } | |
1e999736 | 1129 | |
c728a914 TH |
1130 | if (lba48) |
1131 | *max_sectors = ata_tf_to_lba48(&tf); | |
1132 | else | |
1133 | *max_sectors = ata_tf_to_lba(&tf); | |
2dcb407e | 1134 | if (dev->horkage & ATA_HORKAGE_HPA_SIZE) |
93328e11 | 1135 | (*max_sectors)--; |
c728a914 | 1136 | return 0; |
1e999736 AC |
1137 | } |
1138 | ||
1139 | /** | |
c728a914 TH |
1140 | * ata_set_max_sectors - Set max sectors |
1141 | * @dev: target device | |
6b38d1d1 | 1142 | * @new_sectors: new max sectors value to set for the device |
1e999736 | 1143 | * |
c728a914 TH |
1144 | * Set max sectors of @dev to @new_sectors. |
1145 | * | |
1146 | * RETURNS: | |
1147 | * 0 on success, -EACCES if command is aborted or denied (due to | |
1148 | * previous non-volatile SET_MAX) by the drive. -EIO on other | |
1149 | * errors. | |
1e999736 | 1150 | */ |
05027adc | 1151 | static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) |
1e999736 | 1152 | { |
c728a914 | 1153 | unsigned int err_mask; |
1e999736 | 1154 | struct ata_taskfile tf; |
c728a914 | 1155 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
1156 | |
1157 | new_sectors--; | |
1158 | ||
1159 | ata_tf_init(dev, &tf); | |
1160 | ||
1e999736 | 1161 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
c728a914 TH |
1162 | |
1163 | if (lba48) { | |
1164 | tf.command = ATA_CMD_SET_MAX_EXT; | |
1165 | tf.flags |= ATA_TFLAG_LBA48; | |
1166 | ||
1167 | tf.hob_lbal = (new_sectors >> 24) & 0xff; | |
1168 | tf.hob_lbam = (new_sectors >> 32) & 0xff; | |
1169 | tf.hob_lbah = (new_sectors >> 40) & 0xff; | |
1e582ba4 | 1170 | } else { |
c728a914 TH |
1171 | tf.command = ATA_CMD_SET_MAX; |
1172 | ||
1e582ba4 TH |
1173 | tf.device |= (new_sectors >> 24) & 0xf; |
1174 | } | |
1175 | ||
1e999736 | 1176 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 | 1177 | tf.device |= ATA_LBA; |
1e999736 AC |
1178 | |
1179 | tf.lbal = (new_sectors >> 0) & 0xff; | |
1180 | tf.lbam = (new_sectors >> 8) & 0xff; | |
1181 | tf.lbah = (new_sectors >> 16) & 0xff; | |
1e999736 | 1182 | |
2b789108 | 1183 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
c728a914 TH |
1184 | if (err_mask) { |
1185 | ata_dev_printk(dev, KERN_WARNING, "failed to set " | |
1186 | "max address (err_mask=0x%x)\n", err_mask); | |
1187 | if (err_mask == AC_ERR_DEV && | |
1188 | (tf.feature & (ATA_ABORTED | ATA_IDNF))) | |
1189 | return -EACCES; | |
1190 | return -EIO; | |
1191 | } | |
1192 | ||
c728a914 | 1193 | return 0; |
1e999736 AC |
1194 | } |
1195 | ||
1196 | /** | |
1197 | * ata_hpa_resize - Resize a device with an HPA set | |
1198 | * @dev: Device to resize | |
1199 | * | |
1200 | * Read the size of an LBA28 or LBA48 disk with HPA features and resize | |
1201 | * it if required to the full size of the media. The caller must check | |
1202 | * the drive has the HPA feature set enabled. | |
05027adc TH |
1203 | * |
1204 | * RETURNS: | |
1205 | * 0 on success, -errno on failure. | |
1e999736 | 1206 | */ |
05027adc | 1207 | static int ata_hpa_resize(struct ata_device *dev) |
1e999736 | 1208 | { |
05027adc TH |
1209 | struct ata_eh_context *ehc = &dev->link->eh_context; |
1210 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; | |
1211 | u64 sectors = ata_id_n_sectors(dev->id); | |
1212 | u64 native_sectors; | |
c728a914 | 1213 | int rc; |
a617c09f | 1214 | |
05027adc TH |
1215 | /* do we need to do it? */ |
1216 | if (dev->class != ATA_DEV_ATA || | |
1217 | !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || | |
1218 | (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) | |
c728a914 | 1219 | return 0; |
1e999736 | 1220 | |
05027adc TH |
1221 | /* read native max address */ |
1222 | rc = ata_read_native_max_address(dev, &native_sectors); | |
1223 | if (rc) { | |
1224 | /* If HPA isn't going to be unlocked, skip HPA | |
1225 | * resizing from the next try. | |
1226 | */ | |
1227 | if (!ata_ignore_hpa) { | |
1228 | ata_dev_printk(dev, KERN_WARNING, "HPA support seems " | |
1229 | "broken, will skip HPA handling\n"); | |
1230 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; | |
1231 | ||
1232 | /* we can continue if device aborted the command */ | |
1233 | if (rc == -EACCES) | |
1234 | rc = 0; | |
1e999736 | 1235 | } |
37301a55 | 1236 | |
05027adc TH |
1237 | return rc; |
1238 | } | |
1239 | ||
1240 | /* nothing to do? */ | |
1241 | if (native_sectors <= sectors || !ata_ignore_hpa) { | |
1242 | if (!print_info || native_sectors == sectors) | |
1243 | return 0; | |
1244 | ||
1245 | if (native_sectors > sectors) | |
1246 | ata_dev_printk(dev, KERN_INFO, | |
1247 | "HPA detected: current %llu, native %llu\n", | |
1248 | (unsigned long long)sectors, | |
1249 | (unsigned long long)native_sectors); | |
1250 | else if (native_sectors < sectors) | |
1251 | ata_dev_printk(dev, KERN_WARNING, | |
1252 | "native sectors (%llu) is smaller than " | |
1253 | "sectors (%llu)\n", | |
1254 | (unsigned long long)native_sectors, | |
1255 | (unsigned long long)sectors); | |
1256 | return 0; | |
1257 | } | |
1258 | ||
1259 | /* let's unlock HPA */ | |
1260 | rc = ata_set_max_sectors(dev, native_sectors); | |
1261 | if (rc == -EACCES) { | |
1262 | /* if device aborted the command, skip HPA resizing */ | |
1263 | ata_dev_printk(dev, KERN_WARNING, "device aborted resize " | |
1264 | "(%llu -> %llu), skipping HPA handling\n", | |
1265 | (unsigned long long)sectors, | |
1266 | (unsigned long long)native_sectors); | |
1267 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; | |
1268 | return 0; | |
1269 | } else if (rc) | |
1270 | return rc; | |
1271 | ||
1272 | /* re-read IDENTIFY data */ | |
1273 | rc = ata_dev_reread_id(dev, 0); | |
1274 | if (rc) { | |
1275 | ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY " | |
1276 | "data after HPA resizing\n"); | |
1277 | return rc; | |
1278 | } | |
1279 | ||
1280 | if (print_info) { | |
1281 | u64 new_sectors = ata_id_n_sectors(dev->id); | |
1282 | ata_dev_printk(dev, KERN_INFO, | |
1283 | "HPA unlocked: %llu -> %llu, native %llu\n", | |
1284 | (unsigned long long)sectors, | |
1285 | (unsigned long long)new_sectors, | |
1286 | (unsigned long long)native_sectors); | |
1287 | } | |
1288 | ||
1289 | return 0; | |
1e999736 AC |
1290 | } |
1291 | ||
10305f0f AC |
1292 | /** |
1293 | * ata_id_to_dma_mode - Identify DMA mode from id block | |
1294 | * @dev: device to identify | |
cc261267 | 1295 | * @unknown: mode to assume if we cannot tell |
10305f0f AC |
1296 | * |
1297 | * Set up the timing values for the device based upon the identify | |
1298 | * reported values for the DMA mode. This function is used by drivers | |
1299 | * which rely upon firmware configured modes, but wish to report the | |
1300 | * mode correctly when possible. | |
1301 | * | |
1302 | * In addition we emit similarly formatted messages to the default | |
1303 | * ata_dev_set_mode handler, in order to provide consistency of | |
1304 | * presentation. | |
1305 | */ | |
1306 | ||
1307 | void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown) | |
1308 | { | |
1309 | unsigned int mask; | |
1310 | u8 mode; | |
1311 | ||
1312 | /* Pack the DMA modes */ | |
1313 | mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA; | |
1314 | if (dev->id[53] & 0x04) | |
1315 | mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA; | |
1316 | ||
1317 | /* Select the mode in use */ | |
1318 | mode = ata_xfer_mask2mode(mask); | |
1319 | ||
1320 | if (mode != 0) { | |
1321 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", | |
1322 | ata_mode_string(mask)); | |
1323 | } else { | |
1324 | /* SWDMA perhaps ? */ | |
1325 | mode = unknown; | |
1326 | ata_dev_printk(dev, KERN_INFO, "configured for DMA\n"); | |
1327 | } | |
1328 | ||
1329 | /* Configure the device reporting */ | |
1330 | dev->xfer_mode = mode; | |
1331 | dev->xfer_shift = ata_xfer_mode2shift(mode); | |
1332 | } | |
1333 | ||
0baab86b EF |
1334 | /** |
1335 | * ata_noop_dev_select - Select device 0/1 on ATA bus | |
1336 | * @ap: ATA channel to manipulate | |
1337 | * @device: ATA device (numbered from zero) to select | |
1338 | * | |
1339 | * This function performs no actual function. | |
1340 | * | |
1341 | * May be used as the dev_select() entry in ata_port_operations. | |
1342 | * | |
1343 | * LOCKING: | |
1344 | * caller. | |
1345 | */ | |
2dcb407e | 1346 | void ata_noop_dev_select(struct ata_port *ap, unsigned int device) |
1da177e4 LT |
1347 | { |
1348 | } | |
1349 | ||
0baab86b | 1350 | |
1da177e4 LT |
1351 | /** |
1352 | * ata_std_dev_select - Select device 0/1 on ATA bus | |
1353 | * @ap: ATA channel to manipulate | |
1354 | * @device: ATA device (numbered from zero) to select | |
1355 | * | |
1356 | * Use the method defined in the ATA specification to | |
1357 | * make either device 0, or device 1, active on the | |
0baab86b EF |
1358 | * ATA channel. Works with both PIO and MMIO. |
1359 | * | |
1360 | * May be used as the dev_select() entry in ata_port_operations. | |
1da177e4 LT |
1361 | * |
1362 | * LOCKING: | |
1363 | * caller. | |
1364 | */ | |
1365 | ||
2dcb407e | 1366 | void ata_std_dev_select(struct ata_port *ap, unsigned int device) |
1da177e4 LT |
1367 | { |
1368 | u8 tmp; | |
1369 | ||
1370 | if (device == 0) | |
1371 | tmp = ATA_DEVICE_OBS; | |
1372 | else | |
1373 | tmp = ATA_DEVICE_OBS | ATA_DEV1; | |
1374 | ||
0d5ff566 | 1375 | iowrite8(tmp, ap->ioaddr.device_addr); |
1da177e4 LT |
1376 | ata_pause(ap); /* needed; also flushes, for mmio */ |
1377 | } | |
1378 | ||
1379 | /** | |
1380 | * ata_dev_select - Select device 0/1 on ATA bus | |
1381 | * @ap: ATA channel to manipulate | |
1382 | * @device: ATA device (numbered from zero) to select | |
1383 | * @wait: non-zero to wait for Status register BSY bit to clear | |
1384 | * @can_sleep: non-zero if context allows sleeping | |
1385 | * | |
1386 | * Use the method defined in the ATA specification to | |
1387 | * make either device 0, or device 1, active on the | |
1388 | * ATA channel. | |
1389 | * | |
1390 | * This is a high-level version of ata_std_dev_select(), | |
1391 | * which additionally provides the services of inserting | |
1392 | * the proper pauses and status polling, where needed. | |
1393 | * | |
1394 | * LOCKING: | |
1395 | * caller. | |
1396 | */ | |
1397 | ||
1398 | void ata_dev_select(struct ata_port *ap, unsigned int device, | |
1399 | unsigned int wait, unsigned int can_sleep) | |
1400 | { | |
88574551 | 1401 | if (ata_msg_probe(ap)) |
44877b4e TH |
1402 | ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " |
1403 | "device %u, wait %u\n", device, wait); | |
1da177e4 LT |
1404 | |
1405 | if (wait) | |
1406 | ata_wait_idle(ap); | |
1407 | ||
1408 | ap->ops->dev_select(ap, device); | |
1409 | ||
1410 | if (wait) { | |
9af5c9c9 | 1411 | if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI) |
1da177e4 LT |
1412 | msleep(150); |
1413 | ata_wait_idle(ap); | |
1414 | } | |
1415 | } | |
1416 | ||
1417 | /** | |
1418 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 1419 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 1420 | * |
0bd3300a TH |
1421 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
1422 | * page. | |
1da177e4 LT |
1423 | * |
1424 | * LOCKING: | |
1425 | * caller. | |
1426 | */ | |
1427 | ||
0bd3300a | 1428 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
1429 | { |
1430 | DPRINTK("49==0x%04x " | |
1431 | "53==0x%04x " | |
1432 | "63==0x%04x " | |
1433 | "64==0x%04x " | |
1434 | "75==0x%04x \n", | |
0bd3300a TH |
1435 | id[49], |
1436 | id[53], | |
1437 | id[63], | |
1438 | id[64], | |
1439 | id[75]); | |
1da177e4 LT |
1440 | DPRINTK("80==0x%04x " |
1441 | "81==0x%04x " | |
1442 | "82==0x%04x " | |
1443 | "83==0x%04x " | |
1444 | "84==0x%04x \n", | |
0bd3300a TH |
1445 | id[80], |
1446 | id[81], | |
1447 | id[82], | |
1448 | id[83], | |
1449 | id[84]); | |
1da177e4 LT |
1450 | DPRINTK("88==0x%04x " |
1451 | "93==0x%04x\n", | |
0bd3300a TH |
1452 | id[88], |
1453 | id[93]); | |
1da177e4 LT |
1454 | } |
1455 | ||
cb95d562 TH |
1456 | /** |
1457 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
1458 | * @id: IDENTIFY data to compute xfer mask from | |
1459 | * | |
1460 | * Compute the xfermask for this device. This is not as trivial | |
1461 | * as it seems if we must consider early devices correctly. | |
1462 | * | |
1463 | * FIXME: pre IDE drive timing (do we care ?). | |
1464 | * | |
1465 | * LOCKING: | |
1466 | * None. | |
1467 | * | |
1468 | * RETURNS: | |
1469 | * Computed xfermask | |
1470 | */ | |
1471 | static unsigned int ata_id_xfermask(const u16 *id) | |
1472 | { | |
1473 | unsigned int pio_mask, mwdma_mask, udma_mask; | |
1474 | ||
1475 | /* Usual case. Word 53 indicates word 64 is valid */ | |
1476 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
1477 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
1478 | pio_mask <<= 3; | |
1479 | pio_mask |= 0x7; | |
1480 | } else { | |
1481 | /* If word 64 isn't valid then Word 51 high byte holds | |
1482 | * the PIO timing number for the maximum. Turn it into | |
1483 | * a mask. | |
1484 | */ | |
7a0f1c8a | 1485 | u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
46767aeb | 1486 | if (mode < 5) /* Valid PIO range */ |
2dcb407e | 1487 | pio_mask = (2 << mode) - 1; |
46767aeb AC |
1488 | else |
1489 | pio_mask = 1; | |
cb95d562 TH |
1490 | |
1491 | /* But wait.. there's more. Design your standards by | |
1492 | * committee and you too can get a free iordy field to | |
1493 | * process. However its the speeds not the modes that | |
1494 | * are supported... Note drivers using the timing API | |
1495 | * will get this right anyway | |
1496 | */ | |
1497 | } | |
1498 | ||
1499 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
fb21f0d0 | 1500 | |
b352e57d AC |
1501 | if (ata_id_is_cfa(id)) { |
1502 | /* | |
1503 | * Process compact flash extended modes | |
1504 | */ | |
1505 | int pio = id[163] & 0x7; | |
1506 | int dma = (id[163] >> 3) & 7; | |
1507 | ||
1508 | if (pio) | |
1509 | pio_mask |= (1 << 5); | |
1510 | if (pio > 1) | |
1511 | pio_mask |= (1 << 6); | |
1512 | if (dma) | |
1513 | mwdma_mask |= (1 << 3); | |
1514 | if (dma > 1) | |
1515 | mwdma_mask |= (1 << 4); | |
1516 | } | |
1517 | ||
fb21f0d0 TH |
1518 | udma_mask = 0; |
1519 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
1520 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
cb95d562 TH |
1521 | |
1522 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
1523 | } | |
1524 | ||
86e45b6b TH |
1525 | /** |
1526 | * ata_port_queue_task - Queue port_task | |
1527 | * @ap: The ata_port to queue port_task for | |
e2a7f77a | 1528 | * @fn: workqueue function to be scheduled |
65f27f38 | 1529 | * @data: data for @fn to use |
e2a7f77a | 1530 | * @delay: delay time for workqueue function |
86e45b6b TH |
1531 | * |
1532 | * Schedule @fn(@data) for execution after @delay jiffies using | |
1533 | * port_task. There is one port_task per port and it's the | |
1534 | * user(low level driver)'s responsibility to make sure that only | |
1535 | * one task is active at any given time. | |
1536 | * | |
1537 | * libata core layer takes care of synchronization between | |
1538 | * port_task and EH. ata_port_queue_task() may be ignored for EH | |
1539 | * synchronization. | |
1540 | * | |
1541 | * LOCKING: | |
1542 | * Inherited from caller. | |
1543 | */ | |
65f27f38 | 1544 | void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data, |
86e45b6b TH |
1545 | unsigned long delay) |
1546 | { | |
65f27f38 DH |
1547 | PREPARE_DELAYED_WORK(&ap->port_task, fn); |
1548 | ap->port_task_data = data; | |
86e45b6b | 1549 | |
45a66c1c ON |
1550 | /* may fail if ata_port_flush_task() in progress */ |
1551 | queue_delayed_work(ata_wq, &ap->port_task, delay); | |
86e45b6b TH |
1552 | } |
1553 | ||
1554 | /** | |
1555 | * ata_port_flush_task - Flush port_task | |
1556 | * @ap: The ata_port to flush port_task for | |
1557 | * | |
1558 | * After this function completes, port_task is guranteed not to | |
1559 | * be running or scheduled. | |
1560 | * | |
1561 | * LOCKING: | |
1562 | * Kernel thread context (may sleep) | |
1563 | */ | |
1564 | void ata_port_flush_task(struct ata_port *ap) | |
1565 | { | |
86e45b6b TH |
1566 | DPRINTK("ENTER\n"); |
1567 | ||
45a66c1c | 1568 | cancel_rearming_delayed_work(&ap->port_task); |
86e45b6b | 1569 | |
0dd4b21f BP |
1570 | if (ata_msg_ctl(ap)) |
1571 | ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); | |
86e45b6b TH |
1572 | } |
1573 | ||
7102d230 | 1574 | static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 1575 | { |
77853bf2 | 1576 | struct completion *waiting = qc->private_data; |
a2a7a662 | 1577 | |
a2a7a662 | 1578 | complete(waiting); |
a2a7a662 TH |
1579 | } |
1580 | ||
1581 | /** | |
2432697b | 1582 | * ata_exec_internal_sg - execute libata internal command |
a2a7a662 TH |
1583 | * @dev: Device to which the command is sent |
1584 | * @tf: Taskfile registers for the command and the result | |
d69cf37d | 1585 | * @cdb: CDB for packet command |
a2a7a662 | 1586 | * @dma_dir: Data tranfer direction of the command |
5c1ad8b3 | 1587 | * @sgl: sg list for the data buffer of the command |
2432697b | 1588 | * @n_elem: Number of sg entries |
2b789108 | 1589 | * @timeout: Timeout in msecs (0 for default) |
a2a7a662 TH |
1590 | * |
1591 | * Executes libata internal command with timeout. @tf contains | |
1592 | * command on entry and result on return. Timeout and error | |
1593 | * conditions are reported via return value. No recovery action | |
1594 | * is taken after a command times out. It's caller's duty to | |
1595 | * clean up after timeout. | |
1596 | * | |
1597 | * LOCKING: | |
1598 | * None. Should be called with kernel context, might sleep. | |
551e8889 TH |
1599 | * |
1600 | * RETURNS: | |
1601 | * Zero on success, AC_ERR_* mask on failure | |
a2a7a662 | 1602 | */ |
2432697b TH |
1603 | unsigned ata_exec_internal_sg(struct ata_device *dev, |
1604 | struct ata_taskfile *tf, const u8 *cdb, | |
87260216 | 1605 | int dma_dir, struct scatterlist *sgl, |
2b789108 | 1606 | unsigned int n_elem, unsigned long timeout) |
a2a7a662 | 1607 | { |
9af5c9c9 TH |
1608 | struct ata_link *link = dev->link; |
1609 | struct ata_port *ap = link->ap; | |
a2a7a662 TH |
1610 | u8 command = tf->command; |
1611 | struct ata_queued_cmd *qc; | |
2ab7db1f | 1612 | unsigned int tag, preempted_tag; |
dedaf2b0 | 1613 | u32 preempted_sactive, preempted_qc_active; |
da917d69 | 1614 | int preempted_nr_active_links; |
60be6b9a | 1615 | DECLARE_COMPLETION_ONSTACK(wait); |
a2a7a662 | 1616 | unsigned long flags; |
77853bf2 | 1617 | unsigned int err_mask; |
d95a717f | 1618 | int rc; |
a2a7a662 | 1619 | |
ba6a1308 | 1620 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 | 1621 | |
e3180499 | 1622 | /* no internal command while frozen */ |
b51e9e5d | 1623 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
ba6a1308 | 1624 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1625 | return AC_ERR_SYSTEM; |
1626 | } | |
1627 | ||
2ab7db1f | 1628 | /* initialize internal qc */ |
a2a7a662 | 1629 | |
2ab7db1f TH |
1630 | /* XXX: Tag 0 is used for drivers with legacy EH as some |
1631 | * drivers choke if any other tag is given. This breaks | |
1632 | * ata_tag_internal() test for those drivers. Don't use new | |
1633 | * EH stuff without converting to it. | |
1634 | */ | |
1635 | if (ap->ops->error_handler) | |
1636 | tag = ATA_TAG_INTERNAL; | |
1637 | else | |
1638 | tag = 0; | |
1639 | ||
6cec4a39 | 1640 | if (test_and_set_bit(tag, &ap->qc_allocated)) |
2ab7db1f | 1641 | BUG(); |
f69499f4 | 1642 | qc = __ata_qc_from_tag(ap, tag); |
2ab7db1f TH |
1643 | |
1644 | qc->tag = tag; | |
1645 | qc->scsicmd = NULL; | |
1646 | qc->ap = ap; | |
1647 | qc->dev = dev; | |
1648 | ata_qc_reinit(qc); | |
1649 | ||
9af5c9c9 TH |
1650 | preempted_tag = link->active_tag; |
1651 | preempted_sactive = link->sactive; | |
dedaf2b0 | 1652 | preempted_qc_active = ap->qc_active; |
da917d69 | 1653 | preempted_nr_active_links = ap->nr_active_links; |
9af5c9c9 TH |
1654 | link->active_tag = ATA_TAG_POISON; |
1655 | link->sactive = 0; | |
dedaf2b0 | 1656 | ap->qc_active = 0; |
da917d69 | 1657 | ap->nr_active_links = 0; |
2ab7db1f TH |
1658 | |
1659 | /* prepare & issue qc */ | |
a2a7a662 | 1660 | qc->tf = *tf; |
d69cf37d TH |
1661 | if (cdb) |
1662 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); | |
e61e0672 | 1663 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
a2a7a662 TH |
1664 | qc->dma_dir = dma_dir; |
1665 | if (dma_dir != DMA_NONE) { | |
2432697b | 1666 | unsigned int i, buflen = 0; |
87260216 | 1667 | struct scatterlist *sg; |
2432697b | 1668 | |
87260216 JA |
1669 | for_each_sg(sgl, sg, n_elem, i) |
1670 | buflen += sg->length; | |
2432697b | 1671 | |
87260216 | 1672 | ata_sg_init(qc, sgl, n_elem); |
49c80429 | 1673 | qc->nbytes = buflen; |
a2a7a662 TH |
1674 | } |
1675 | ||
77853bf2 | 1676 | qc->private_data = &wait; |
a2a7a662 TH |
1677 | qc->complete_fn = ata_qc_complete_internal; |
1678 | ||
8e0e694a | 1679 | ata_qc_issue(qc); |
a2a7a662 | 1680 | |
ba6a1308 | 1681 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 | 1682 | |
2b789108 TH |
1683 | if (!timeout) |
1684 | timeout = ata_probe_timeout * 1000 / HZ; | |
1685 | ||
1686 | rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); | |
d95a717f TH |
1687 | |
1688 | ata_port_flush_task(ap); | |
41ade50c | 1689 | |
d95a717f | 1690 | if (!rc) { |
ba6a1308 | 1691 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 TH |
1692 | |
1693 | /* We're racing with irq here. If we lose, the | |
1694 | * following test prevents us from completing the qc | |
d95a717f TH |
1695 | * twice. If we win, the port is frozen and will be |
1696 | * cleaned up by ->post_internal_cmd(). | |
a2a7a662 | 1697 | */ |
77853bf2 | 1698 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
d95a717f TH |
1699 | qc->err_mask |= AC_ERR_TIMEOUT; |
1700 | ||
1701 | if (ap->ops->error_handler) | |
1702 | ata_port_freeze(ap); | |
1703 | else | |
1704 | ata_qc_complete(qc); | |
f15a1daf | 1705 | |
0dd4b21f BP |
1706 | if (ata_msg_warn(ap)) |
1707 | ata_dev_printk(dev, KERN_WARNING, | |
88574551 | 1708 | "qc timeout (cmd 0x%x)\n", command); |
a2a7a662 TH |
1709 | } |
1710 | ||
ba6a1308 | 1711 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 TH |
1712 | } |
1713 | ||
d95a717f TH |
1714 | /* do post_internal_cmd */ |
1715 | if (ap->ops->post_internal_cmd) | |
1716 | ap->ops->post_internal_cmd(qc); | |
1717 | ||
a51d644a TH |
1718 | /* perform minimal error analysis */ |
1719 | if (qc->flags & ATA_QCFLAG_FAILED) { | |
1720 | if (qc->result_tf.command & (ATA_ERR | ATA_DF)) | |
1721 | qc->err_mask |= AC_ERR_DEV; | |
1722 | ||
1723 | if (!qc->err_mask) | |
1724 | qc->err_mask |= AC_ERR_OTHER; | |
1725 | ||
1726 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1727 | qc->err_mask &= ~AC_ERR_OTHER; | |
d95a717f TH |
1728 | } |
1729 | ||
15869303 | 1730 | /* finish up */ |
ba6a1308 | 1731 | spin_lock_irqsave(ap->lock, flags); |
15869303 | 1732 | |
e61e0672 | 1733 | *tf = qc->result_tf; |
77853bf2 TH |
1734 | err_mask = qc->err_mask; |
1735 | ||
1736 | ata_qc_free(qc); | |
9af5c9c9 TH |
1737 | link->active_tag = preempted_tag; |
1738 | link->sactive = preempted_sactive; | |
dedaf2b0 | 1739 | ap->qc_active = preempted_qc_active; |
da917d69 | 1740 | ap->nr_active_links = preempted_nr_active_links; |
77853bf2 | 1741 | |
1f7dd3e9 TH |
1742 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
1743 | * Until those drivers are fixed, we detect the condition | |
1744 | * here, fail the command with AC_ERR_SYSTEM and reenable the | |
1745 | * port. | |
1746 | * | |
1747 | * Note that this doesn't change any behavior as internal | |
1748 | * command failure results in disabling the device in the | |
1749 | * higher layer for LLDDs without new reset/EH callbacks. | |
1750 | * | |
1751 | * Kill the following code as soon as those drivers are fixed. | |
1752 | */ | |
198e0fed | 1753 | if (ap->flags & ATA_FLAG_DISABLED) { |
1f7dd3e9 TH |
1754 | err_mask |= AC_ERR_SYSTEM; |
1755 | ata_port_probe(ap); | |
1756 | } | |
1757 | ||
ba6a1308 | 1758 | spin_unlock_irqrestore(ap->lock, flags); |
15869303 | 1759 | |
77853bf2 | 1760 | return err_mask; |
a2a7a662 TH |
1761 | } |
1762 | ||
2432697b | 1763 | /** |
33480a0e | 1764 | * ata_exec_internal - execute libata internal command |
2432697b TH |
1765 | * @dev: Device to which the command is sent |
1766 | * @tf: Taskfile registers for the command and the result | |
1767 | * @cdb: CDB for packet command | |
1768 | * @dma_dir: Data tranfer direction of the command | |
1769 | * @buf: Data buffer of the command | |
1770 | * @buflen: Length of data buffer | |
2b789108 | 1771 | * @timeout: Timeout in msecs (0 for default) |
2432697b TH |
1772 | * |
1773 | * Wrapper around ata_exec_internal_sg() which takes simple | |
1774 | * buffer instead of sg list. | |
1775 | * | |
1776 | * LOCKING: | |
1777 | * None. Should be called with kernel context, might sleep. | |
1778 | * | |
1779 | * RETURNS: | |
1780 | * Zero on success, AC_ERR_* mask on failure | |
1781 | */ | |
1782 | unsigned ata_exec_internal(struct ata_device *dev, | |
1783 | struct ata_taskfile *tf, const u8 *cdb, | |
2b789108 TH |
1784 | int dma_dir, void *buf, unsigned int buflen, |
1785 | unsigned long timeout) | |
2432697b | 1786 | { |
33480a0e TH |
1787 | struct scatterlist *psg = NULL, sg; |
1788 | unsigned int n_elem = 0; | |
2432697b | 1789 | |
33480a0e TH |
1790 | if (dma_dir != DMA_NONE) { |
1791 | WARN_ON(!buf); | |
1792 | sg_init_one(&sg, buf, buflen); | |
1793 | psg = &sg; | |
1794 | n_elem++; | |
1795 | } | |
2432697b | 1796 | |
2b789108 TH |
1797 | return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, |
1798 | timeout); | |
2432697b TH |
1799 | } |
1800 | ||
977e6b9f TH |
1801 | /** |
1802 | * ata_do_simple_cmd - execute simple internal command | |
1803 | * @dev: Device to which the command is sent | |
1804 | * @cmd: Opcode to execute | |
1805 | * | |
1806 | * Execute a 'simple' command, that only consists of the opcode | |
1807 | * 'cmd' itself, without filling any other registers | |
1808 | * | |
1809 | * LOCKING: | |
1810 | * Kernel thread context (may sleep). | |
1811 | * | |
1812 | * RETURNS: | |
1813 | * Zero on success, AC_ERR_* mask on failure | |
e58eb583 | 1814 | */ |
77b08fb5 | 1815 | unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
e58eb583 TH |
1816 | { |
1817 | struct ata_taskfile tf; | |
e58eb583 TH |
1818 | |
1819 | ata_tf_init(dev, &tf); | |
1820 | ||
1821 | tf.command = cmd; | |
1822 | tf.flags |= ATA_TFLAG_DEVICE; | |
1823 | tf.protocol = ATA_PROT_NODATA; | |
1824 | ||
2b789108 | 1825 | return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
e58eb583 TH |
1826 | } |
1827 | ||
1bc4ccff AC |
1828 | /** |
1829 | * ata_pio_need_iordy - check if iordy needed | |
1830 | * @adev: ATA device | |
1831 | * | |
1832 | * Check if the current speed of the device requires IORDY. Used | |
1833 | * by various controllers for chip configuration. | |
1834 | */ | |
a617c09f | 1835 | |
1bc4ccff AC |
1836 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
1837 | { | |
432729f0 AC |
1838 | /* Controller doesn't support IORDY. Probably a pointless check |
1839 | as the caller should know this */ | |
9af5c9c9 | 1840 | if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) |
1bc4ccff | 1841 | return 0; |
432729f0 AC |
1842 | /* PIO3 and higher it is mandatory */ |
1843 | if (adev->pio_mode > XFER_PIO_2) | |
1844 | return 1; | |
1845 | /* We turn it on when possible */ | |
1846 | if (ata_id_has_iordy(adev->id)) | |
1bc4ccff | 1847 | return 1; |
432729f0 AC |
1848 | return 0; |
1849 | } | |
2e9edbf8 | 1850 | |
432729f0 AC |
1851 | /** |
1852 | * ata_pio_mask_no_iordy - Return the non IORDY mask | |
1853 | * @adev: ATA device | |
1854 | * | |
1855 | * Compute the highest mode possible if we are not using iordy. Return | |
1856 | * -1 if no iordy mode is available. | |
1857 | */ | |
a617c09f | 1858 | |
432729f0 AC |
1859 | static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) |
1860 | { | |
1bc4ccff | 1861 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
1bc4ccff | 1862 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
432729f0 | 1863 | u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
1bc4ccff AC |
1864 | /* Is the speed faster than the drive allows non IORDY ? */ |
1865 | if (pio) { | |
1866 | /* This is cycle times not frequency - watch the logic! */ | |
1867 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
432729f0 AC |
1868 | return 3 << ATA_SHIFT_PIO; |
1869 | return 7 << ATA_SHIFT_PIO; | |
1bc4ccff AC |
1870 | } |
1871 | } | |
432729f0 | 1872 | return 3 << ATA_SHIFT_PIO; |
1bc4ccff AC |
1873 | } |
1874 | ||
1da177e4 | 1875 | /** |
49016aca | 1876 | * ata_dev_read_id - Read ID data from the specified device |
49016aca TH |
1877 | * @dev: target device |
1878 | * @p_class: pointer to class of the target device (may be changed) | |
bff04647 | 1879 | * @flags: ATA_READID_* flags |
fe635c7e | 1880 | * @id: buffer to read IDENTIFY data into |
1da177e4 | 1881 | * |
49016aca TH |
1882 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
1883 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
aec5c3c1 TH |
1884 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
1885 | * for pre-ATA4 drives. | |
1da177e4 | 1886 | * |
50a99018 | 1887 | * FIXME: ATA_CMD_ID_ATA is optional for early drives and right |
2dcb407e | 1888 | * now we abort if we hit that case. |
50a99018 | 1889 | * |
1da177e4 | 1890 | * LOCKING: |
49016aca TH |
1891 | * Kernel thread context (may sleep) |
1892 | * | |
1893 | * RETURNS: | |
1894 | * 0 on success, -errno otherwise. | |
1da177e4 | 1895 | */ |
a9beec95 | 1896 | int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, |
bff04647 | 1897 | unsigned int flags, u16 *id) |
1da177e4 | 1898 | { |
9af5c9c9 | 1899 | struct ata_port *ap = dev->link->ap; |
49016aca | 1900 | unsigned int class = *p_class; |
a0123703 | 1901 | struct ata_taskfile tf; |
49016aca TH |
1902 | unsigned int err_mask = 0; |
1903 | const char *reason; | |
54936f8b | 1904 | int may_fallback = 1, tried_spinup = 0; |
49016aca | 1905 | int rc; |
1da177e4 | 1906 | |
0dd4b21f | 1907 | if (ata_msg_ctl(ap)) |
44877b4e | 1908 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); |
1da177e4 | 1909 | |
49016aca | 1910 | ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ |
49016aca | 1911 | retry: |
3373efd8 | 1912 | ata_tf_init(dev, &tf); |
a0123703 | 1913 | |
49016aca TH |
1914 | switch (class) { |
1915 | case ATA_DEV_ATA: | |
a0123703 | 1916 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
1917 | break; |
1918 | case ATA_DEV_ATAPI: | |
a0123703 | 1919 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
1920 | break; |
1921 | default: | |
1922 | rc = -ENODEV; | |
1923 | reason = "unsupported class"; | |
1924 | goto err_out; | |
1da177e4 LT |
1925 | } |
1926 | ||
a0123703 | 1927 | tf.protocol = ATA_PROT_PIO; |
81afe893 TH |
1928 | |
1929 | /* Some devices choke if TF registers contain garbage. Make | |
1930 | * sure those are properly initialized. | |
1931 | */ | |
1932 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1933 | ||
1934 | /* Device presence detection is unreliable on some | |
1935 | * controllers. Always poll IDENTIFY if available. | |
1936 | */ | |
1937 | tf.flags |= ATA_TFLAG_POLLING; | |
1da177e4 | 1938 | |
3373efd8 | 1939 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
2b789108 | 1940 | id, sizeof(id[0]) * ATA_ID_WORDS, 0); |
a0123703 | 1941 | if (err_mask) { |
800b3996 | 1942 | if (err_mask & AC_ERR_NODEV_HINT) { |
55a8e2c8 | 1943 | DPRINTK("ata%u.%d: NODEV after polling detection\n", |
44877b4e | 1944 | ap->print_id, dev->devno); |
55a8e2c8 TH |
1945 | return -ENOENT; |
1946 | } | |
1947 | ||
54936f8b TH |
1948 | /* Device or controller might have reported the wrong |
1949 | * device class. Give a shot at the other IDENTIFY if | |
1950 | * the current one is aborted by the device. | |
1951 | */ | |
1952 | if (may_fallback && | |
1953 | (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { | |
1954 | may_fallback = 0; | |
1955 | ||
1956 | if (class == ATA_DEV_ATA) | |
1957 | class = ATA_DEV_ATAPI; | |
1958 | else | |
1959 | class = ATA_DEV_ATA; | |
1960 | goto retry; | |
1961 | } | |
1962 | ||
49016aca TH |
1963 | rc = -EIO; |
1964 | reason = "I/O error"; | |
1da177e4 LT |
1965 | goto err_out; |
1966 | } | |
1967 | ||
54936f8b TH |
1968 | /* Falling back doesn't make sense if ID data was read |
1969 | * successfully at least once. | |
1970 | */ | |
1971 | may_fallback = 0; | |
1972 | ||
49016aca | 1973 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 | 1974 | |
49016aca | 1975 | /* sanity check */ |
a4f5749b | 1976 | rc = -EINVAL; |
6070068b | 1977 | reason = "device reports invalid type"; |
a4f5749b TH |
1978 | |
1979 | if (class == ATA_DEV_ATA) { | |
1980 | if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) | |
1981 | goto err_out; | |
1982 | } else { | |
1983 | if (ata_id_is_ata(id)) | |
1984 | goto err_out; | |
49016aca TH |
1985 | } |
1986 | ||
169439c2 ML |
1987 | if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { |
1988 | tried_spinup = 1; | |
1989 | /* | |
1990 | * Drive powered-up in standby mode, and requires a specific | |
1991 | * SET_FEATURES spin-up subcommand before it will accept | |
1992 | * anything other than the original IDENTIFY command. | |
1993 | */ | |
218f3d30 | 1994 | err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); |
fb0582f9 | 1995 | if (err_mask && id[2] != 0x738c) { |
169439c2 ML |
1996 | rc = -EIO; |
1997 | reason = "SPINUP failed"; | |
1998 | goto err_out; | |
1999 | } | |
2000 | /* | |
2001 | * If the drive initially returned incomplete IDENTIFY info, | |
2002 | * we now must reissue the IDENTIFY command. | |
2003 | */ | |
2004 | if (id[2] == 0x37c8) | |
2005 | goto retry; | |
2006 | } | |
2007 | ||
bff04647 | 2008 | if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { |
49016aca TH |
2009 | /* |
2010 | * The exact sequence expected by certain pre-ATA4 drives is: | |
2011 | * SRST RESET | |
50a99018 AC |
2012 | * IDENTIFY (optional in early ATA) |
2013 | * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) | |
49016aca TH |
2014 | * anything else.. |
2015 | * Some drives were very specific about that exact sequence. | |
50a99018 AC |
2016 | * |
2017 | * Note that ATA4 says lba is mandatory so the second check | |
2018 | * shoud never trigger. | |
49016aca TH |
2019 | */ |
2020 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
3373efd8 | 2021 | err_mask = ata_dev_init_params(dev, id[3], id[6]); |
49016aca TH |
2022 | if (err_mask) { |
2023 | rc = -EIO; | |
2024 | reason = "INIT_DEV_PARAMS failed"; | |
2025 | goto err_out; | |
2026 | } | |
2027 | ||
2028 | /* current CHS translation info (id[53-58]) might be | |
2029 | * changed. reread the identify device info. | |
2030 | */ | |
bff04647 | 2031 | flags &= ~ATA_READID_POSTRESET; |
49016aca TH |
2032 | goto retry; |
2033 | } | |
2034 | } | |
2035 | ||
2036 | *p_class = class; | |
fe635c7e | 2037 | |
49016aca TH |
2038 | return 0; |
2039 | ||
2040 | err_out: | |
88574551 | 2041 | if (ata_msg_warn(ap)) |
0dd4b21f | 2042 | ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
88574551 | 2043 | "(%s, err_mask=0x%x)\n", reason, err_mask); |
49016aca TH |
2044 | return rc; |
2045 | } | |
2046 | ||
3373efd8 | 2047 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
4b2f3ede | 2048 | { |
9af5c9c9 TH |
2049 | struct ata_port *ap = dev->link->ap; |
2050 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); | |
4b2f3ede TH |
2051 | } |
2052 | ||
a6e6ce8e TH |
2053 | static void ata_dev_config_ncq(struct ata_device *dev, |
2054 | char *desc, size_t desc_sz) | |
2055 | { | |
9af5c9c9 | 2056 | struct ata_port *ap = dev->link->ap; |
a6e6ce8e TH |
2057 | int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); |
2058 | ||
2059 | if (!ata_id_has_ncq(dev->id)) { | |
2060 | desc[0] = '\0'; | |
2061 | return; | |
2062 | } | |
75683fe7 | 2063 | if (dev->horkage & ATA_HORKAGE_NONCQ) { |
6919a0a6 AC |
2064 | snprintf(desc, desc_sz, "NCQ (not used)"); |
2065 | return; | |
2066 | } | |
a6e6ce8e | 2067 | if (ap->flags & ATA_FLAG_NCQ) { |
cca3974e | 2068 | hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
a6e6ce8e TH |
2069 | dev->flags |= ATA_DFLAG_NCQ; |
2070 | } | |
2071 | ||
2072 | if (hdepth >= ddepth) | |
2073 | snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); | |
2074 | else | |
2075 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); | |
2076 | } | |
2077 | ||
49016aca | 2078 | /** |
ffeae418 | 2079 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
ffeae418 TH |
2080 | * @dev: Target device to configure |
2081 | * | |
2082 | * Configure @dev according to @dev->id. Generic and low-level | |
2083 | * driver specific fixups are also applied. | |
49016aca TH |
2084 | * |
2085 | * LOCKING: | |
ffeae418 TH |
2086 | * Kernel thread context (may sleep) |
2087 | * | |
2088 | * RETURNS: | |
2089 | * 0 on success, -errno otherwise | |
49016aca | 2090 | */ |
efdaedc4 | 2091 | int ata_dev_configure(struct ata_device *dev) |
49016aca | 2092 | { |
9af5c9c9 TH |
2093 | struct ata_port *ap = dev->link->ap; |
2094 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
6746544c | 2095 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
1148c3a7 | 2096 | const u16 *id = dev->id; |
ff8854b2 | 2097 | unsigned int xfer_mask; |
b352e57d | 2098 | char revbuf[7]; /* XYZ-99\0 */ |
3f64f565 EM |
2099 | char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
2100 | char modelbuf[ATA_ID_PROD_LEN+1]; | |
e6d902a3 | 2101 | int rc; |
49016aca | 2102 | |
0dd4b21f | 2103 | if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
44877b4e TH |
2104 | ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", |
2105 | __FUNCTION__); | |
ffeae418 | 2106 | return 0; |
49016aca TH |
2107 | } |
2108 | ||
0dd4b21f | 2109 | if (ata_msg_probe(ap)) |
44877b4e | 2110 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); |
1da177e4 | 2111 | |
75683fe7 TH |
2112 | /* set horkage */ |
2113 | dev->horkage |= ata_dev_blacklisted(dev); | |
2114 | ||
6746544c TH |
2115 | /* let ACPI work its magic */ |
2116 | rc = ata_acpi_on_devcfg(dev); | |
2117 | if (rc) | |
2118 | return rc; | |
08573a86 | 2119 | |
05027adc TH |
2120 | /* massage HPA, do it early as it might change IDENTIFY data */ |
2121 | rc = ata_hpa_resize(dev); | |
2122 | if (rc) | |
2123 | return rc; | |
2124 | ||
c39f5ebe | 2125 | /* print device capabilities */ |
0dd4b21f | 2126 | if (ata_msg_probe(ap)) |
88574551 TH |
2127 | ata_dev_printk(dev, KERN_DEBUG, |
2128 | "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " | |
2129 | "85:%04x 86:%04x 87:%04x 88:%04x\n", | |
0dd4b21f | 2130 | __FUNCTION__, |
f15a1daf TH |
2131 | id[49], id[82], id[83], id[84], |
2132 | id[85], id[86], id[87], id[88]); | |
c39f5ebe | 2133 | |
208a9933 | 2134 | /* initialize to-be-configured parameters */ |
ea1dd4e1 | 2135 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
208a9933 TH |
2136 | dev->max_sectors = 0; |
2137 | dev->cdb_len = 0; | |
2138 | dev->n_sectors = 0; | |
2139 | dev->cylinders = 0; | |
2140 | dev->heads = 0; | |
2141 | dev->sectors = 0; | |
2142 | ||
1da177e4 LT |
2143 | /* |
2144 | * common ATA, ATAPI feature tests | |
2145 | */ | |
2146 | ||
ff8854b2 | 2147 | /* find max transfer mode; for printk only */ |
1148c3a7 | 2148 | xfer_mask = ata_id_xfermask(id); |
1da177e4 | 2149 | |
0dd4b21f BP |
2150 | if (ata_msg_probe(ap)) |
2151 | ata_dump_id(id); | |
1da177e4 | 2152 | |
ef143d57 AL |
2153 | /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
2154 | ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, | |
2155 | sizeof(fwrevbuf)); | |
2156 | ||
2157 | ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, | |
2158 | sizeof(modelbuf)); | |
2159 | ||
1da177e4 LT |
2160 | /* ATA-specific feature tests */ |
2161 | if (dev->class == ATA_DEV_ATA) { | |
b352e57d AC |
2162 | if (ata_id_is_cfa(id)) { |
2163 | if (id[162] & 1) /* CPRM may make this media unusable */ | |
44877b4e TH |
2164 | ata_dev_printk(dev, KERN_WARNING, |
2165 | "supports DRM functions and may " | |
2166 | "not be fully accessable.\n"); | |
b352e57d | 2167 | snprintf(revbuf, 7, "CFA"); |
ae8d4ee7 | 2168 | } else { |
2dcb407e | 2169 | snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); |
ae8d4ee7 AC |
2170 | /* Warn the user if the device has TPM extensions */ |
2171 | if (ata_id_has_tpm(id)) | |
2172 | ata_dev_printk(dev, KERN_WARNING, | |
2173 | "supports DRM functions and may " | |
2174 | "not be fully accessable.\n"); | |
2175 | } | |
b352e57d | 2176 | |
1148c3a7 | 2177 | dev->n_sectors = ata_id_n_sectors(id); |
2940740b | 2178 | |
3f64f565 EM |
2179 | if (dev->id[59] & 0x100) |
2180 | dev->multi_count = dev->id[59] & 0xff; | |
2181 | ||
1148c3a7 | 2182 | if (ata_id_has_lba(id)) { |
4c2d721a | 2183 | const char *lba_desc; |
a6e6ce8e | 2184 | char ncq_desc[20]; |
8bf62ece | 2185 | |
4c2d721a TH |
2186 | lba_desc = "LBA"; |
2187 | dev->flags |= ATA_DFLAG_LBA; | |
1148c3a7 | 2188 | if (ata_id_has_lba48(id)) { |
8bf62ece | 2189 | dev->flags |= ATA_DFLAG_LBA48; |
4c2d721a | 2190 | lba_desc = "LBA48"; |
6fc49adb TH |
2191 | |
2192 | if (dev->n_sectors >= (1UL << 28) && | |
2193 | ata_id_has_flush_ext(id)) | |
2194 | dev->flags |= ATA_DFLAG_FLUSH_EXT; | |
4c2d721a | 2195 | } |
8bf62ece | 2196 | |
a6e6ce8e TH |
2197 | /* config NCQ */ |
2198 | ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); | |
2199 | ||
8bf62ece | 2200 | /* print device info to dmesg */ |
3f64f565 EM |
2201 | if (ata_msg_drv(ap) && print_info) { |
2202 | ata_dev_printk(dev, KERN_INFO, | |
2203 | "%s: %s, %s, max %s\n", | |
2204 | revbuf, modelbuf, fwrevbuf, | |
2205 | ata_mode_string(xfer_mask)); | |
2206 | ata_dev_printk(dev, KERN_INFO, | |
2207 | "%Lu sectors, multi %u: %s %s\n", | |
f15a1daf | 2208 | (unsigned long long)dev->n_sectors, |
3f64f565 EM |
2209 | dev->multi_count, lba_desc, ncq_desc); |
2210 | } | |
ffeae418 | 2211 | } else { |
8bf62ece AL |
2212 | /* CHS */ |
2213 | ||
2214 | /* Default translation */ | |
1148c3a7 TH |
2215 | dev->cylinders = id[1]; |
2216 | dev->heads = id[3]; | |
2217 | dev->sectors = id[6]; | |
8bf62ece | 2218 | |
1148c3a7 | 2219 | if (ata_id_current_chs_valid(id)) { |
8bf62ece | 2220 | /* Current CHS translation is valid. */ |
1148c3a7 TH |
2221 | dev->cylinders = id[54]; |
2222 | dev->heads = id[55]; | |
2223 | dev->sectors = id[56]; | |
8bf62ece AL |
2224 | } |
2225 | ||
2226 | /* print device info to dmesg */ | |
3f64f565 | 2227 | if (ata_msg_drv(ap) && print_info) { |
88574551 | 2228 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2229 | "%s: %s, %s, max %s\n", |
2230 | revbuf, modelbuf, fwrevbuf, | |
2231 | ata_mode_string(xfer_mask)); | |
a84471fe | 2232 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2233 | "%Lu sectors, multi %u, CHS %u/%u/%u\n", |
2234 | (unsigned long long)dev->n_sectors, | |
2235 | dev->multi_count, dev->cylinders, | |
2236 | dev->heads, dev->sectors); | |
2237 | } | |
07f6f7d0 AL |
2238 | } |
2239 | ||
6e7846e9 | 2240 | dev->cdb_len = 16; |
1da177e4 LT |
2241 | } |
2242 | ||
2243 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 2244 | else if (dev->class == ATA_DEV_ATAPI) { |
854c73a2 TH |
2245 | const char *cdb_intr_string = ""; |
2246 | const char *atapi_an_string = ""; | |
7d77b247 | 2247 | u32 sntf; |
08a556db | 2248 | |
1148c3a7 | 2249 | rc = atapi_cdb_len(id); |
1da177e4 | 2250 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
0dd4b21f | 2251 | if (ata_msg_warn(ap)) |
88574551 TH |
2252 | ata_dev_printk(dev, KERN_WARNING, |
2253 | "unsupported CDB len\n"); | |
ffeae418 | 2254 | rc = -EINVAL; |
1da177e4 LT |
2255 | goto err_out_nosup; |
2256 | } | |
6e7846e9 | 2257 | dev->cdb_len = (unsigned int) rc; |
1da177e4 | 2258 | |
7d77b247 TH |
2259 | /* Enable ATAPI AN if both the host and device have |
2260 | * the support. If PMP is attached, SNTF is required | |
2261 | * to enable ATAPI AN to discern between PHY status | |
2262 | * changed notifications and ATAPI ANs. | |
9f45cbd3 | 2263 | */ |
7d77b247 TH |
2264 | if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && |
2265 | (!ap->nr_pmp_links || | |
2266 | sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { | |
854c73a2 TH |
2267 | unsigned int err_mask; |
2268 | ||
9f45cbd3 | 2269 | /* issue SET feature command to turn this on */ |
218f3d30 JG |
2270 | err_mask = ata_dev_set_feature(dev, |
2271 | SETFEATURES_SATA_ENABLE, SATA_AN); | |
854c73a2 | 2272 | if (err_mask) |
9f45cbd3 | 2273 | ata_dev_printk(dev, KERN_ERR, |
854c73a2 TH |
2274 | "failed to enable ATAPI AN " |
2275 | "(err_mask=0x%x)\n", err_mask); | |
2276 | else { | |
9f45cbd3 | 2277 | dev->flags |= ATA_DFLAG_AN; |
854c73a2 TH |
2278 | atapi_an_string = ", ATAPI AN"; |
2279 | } | |
9f45cbd3 KCA |
2280 | } |
2281 | ||
08a556db | 2282 | if (ata_id_cdb_intr(dev->id)) { |
312f7da2 | 2283 | dev->flags |= ATA_DFLAG_CDB_INTR; |
08a556db AL |
2284 | cdb_intr_string = ", CDB intr"; |
2285 | } | |
312f7da2 | 2286 | |
1da177e4 | 2287 | /* print device info to dmesg */ |
5afc8142 | 2288 | if (ata_msg_drv(ap) && print_info) |
ef143d57 | 2289 | ata_dev_printk(dev, KERN_INFO, |
854c73a2 | 2290 | "ATAPI: %s, %s, max %s%s%s\n", |
ef143d57 | 2291 | modelbuf, fwrevbuf, |
12436c30 | 2292 | ata_mode_string(xfer_mask), |
854c73a2 | 2293 | cdb_intr_string, atapi_an_string); |
1da177e4 LT |
2294 | } |
2295 | ||
914ed354 TH |
2296 | /* determine max_sectors */ |
2297 | dev->max_sectors = ATA_MAX_SECTORS; | |
2298 | if (dev->flags & ATA_DFLAG_LBA48) | |
2299 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; | |
2300 | ||
ca77329f KCA |
2301 | if (!(dev->horkage & ATA_HORKAGE_IPM)) { |
2302 | if (ata_id_has_hipm(dev->id)) | |
2303 | dev->flags |= ATA_DFLAG_HIPM; | |
2304 | if (ata_id_has_dipm(dev->id)) | |
2305 | dev->flags |= ATA_DFLAG_DIPM; | |
2306 | } | |
2307 | ||
93590859 AC |
2308 | if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
2309 | /* Let the user know. We don't want to disallow opens for | |
2310 | rescue purposes, or in case the vendor is just a blithering | |
2311 | idiot */ | |
2dcb407e | 2312 | if (print_info) { |
93590859 AC |
2313 | ata_dev_printk(dev, KERN_WARNING, |
2314 | "Drive reports diagnostics failure. This may indicate a drive\n"); | |
2315 | ata_dev_printk(dev, KERN_WARNING, | |
2316 | "fault or invalid emulation. Contact drive vendor for information.\n"); | |
2317 | } | |
2318 | } | |
2319 | ||
4b2f3ede | 2320 | /* limit bridge transfers to udma5, 200 sectors */ |
3373efd8 | 2321 | if (ata_dev_knobble(dev)) { |
5afc8142 | 2322 | if (ata_msg_drv(ap) && print_info) |
f15a1daf TH |
2323 | ata_dev_printk(dev, KERN_INFO, |
2324 | "applying bridge limits\n"); | |
5a529139 | 2325 | dev->udma_mask &= ATA_UDMA5; |
4b2f3ede TH |
2326 | dev->max_sectors = ATA_MAX_SECTORS; |
2327 | } | |
2328 | ||
f8d8e579 | 2329 | if ((dev->class == ATA_DEV_ATAPI) && |
f442cd86 | 2330 | (atapi_command_packet_set(id) == TYPE_TAPE)) { |
f8d8e579 | 2331 | dev->max_sectors = ATA_MAX_SECTORS_TAPE; |
f442cd86 AL |
2332 | dev->horkage |= ATA_HORKAGE_STUCK_ERR; |
2333 | } | |
f8d8e579 | 2334 | |
75683fe7 | 2335 | if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) |
03ec52de TH |
2336 | dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, |
2337 | dev->max_sectors); | |
18d6e9d5 | 2338 | |
ca77329f KCA |
2339 | if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) { |
2340 | dev->horkage |= ATA_HORKAGE_IPM; | |
2341 | ||
2342 | /* reset link pm_policy for this port to no pm */ | |
2343 | ap->pm_policy = MAX_PERFORMANCE; | |
2344 | } | |
2345 | ||
4b2f3ede | 2346 | if (ap->ops->dev_config) |
cd0d3bbc | 2347 | ap->ops->dev_config(dev); |
4b2f3ede | 2348 | |
0dd4b21f BP |
2349 | if (ata_msg_probe(ap)) |
2350 | ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", | |
2351 | __FUNCTION__, ata_chk_status(ap)); | |
ffeae418 | 2352 | return 0; |
1da177e4 LT |
2353 | |
2354 | err_out_nosup: | |
0dd4b21f | 2355 | if (ata_msg_probe(ap)) |
88574551 TH |
2356 | ata_dev_printk(dev, KERN_DEBUG, |
2357 | "%s: EXIT, err\n", __FUNCTION__); | |
ffeae418 | 2358 | return rc; |
1da177e4 LT |
2359 | } |
2360 | ||
be0d18df | 2361 | /** |
2e41e8e6 | 2362 | * ata_cable_40wire - return 40 wire cable type |
be0d18df AC |
2363 | * @ap: port |
2364 | * | |
2e41e8e6 | 2365 | * Helper method for drivers which want to hardwire 40 wire cable |
be0d18df AC |
2366 | * detection. |
2367 | */ | |
2368 | ||
2369 | int ata_cable_40wire(struct ata_port *ap) | |
2370 | { | |
2371 | return ATA_CBL_PATA40; | |
2372 | } | |
2373 | ||
2374 | /** | |
2e41e8e6 | 2375 | * ata_cable_80wire - return 80 wire cable type |
be0d18df AC |
2376 | * @ap: port |
2377 | * | |
2e41e8e6 | 2378 | * Helper method for drivers which want to hardwire 80 wire cable |
be0d18df AC |
2379 | * detection. |
2380 | */ | |
2381 | ||
2382 | int ata_cable_80wire(struct ata_port *ap) | |
2383 | { | |
2384 | return ATA_CBL_PATA80; | |
2385 | } | |
2386 | ||
2387 | /** | |
2388 | * ata_cable_unknown - return unknown PATA cable. | |
2389 | * @ap: port | |
2390 | * | |
2391 | * Helper method for drivers which have no PATA cable detection. | |
2392 | */ | |
2393 | ||
2394 | int ata_cable_unknown(struct ata_port *ap) | |
2395 | { | |
2396 | return ATA_CBL_PATA_UNK; | |
2397 | } | |
2398 | ||
2399 | /** | |
2400 | * ata_cable_sata - return SATA cable type | |
2401 | * @ap: port | |
2402 | * | |
2403 | * Helper method for drivers which have SATA cables | |
2404 | */ | |
2405 | ||
2406 | int ata_cable_sata(struct ata_port *ap) | |
2407 | { | |
2408 | return ATA_CBL_SATA; | |
2409 | } | |
2410 | ||
1da177e4 LT |
2411 | /** |
2412 | * ata_bus_probe - Reset and probe ATA bus | |
2413 | * @ap: Bus to probe | |
2414 | * | |
0cba632b JG |
2415 | * Master ATA bus probing function. Initiates a hardware-dependent |
2416 | * bus reset, then attempts to identify any devices found on | |
2417 | * the bus. | |
2418 | * | |
1da177e4 | 2419 | * LOCKING: |
0cba632b | 2420 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2421 | * |
2422 | * RETURNS: | |
96072e69 | 2423 | * Zero on success, negative errno otherwise. |
1da177e4 LT |
2424 | */ |
2425 | ||
80289167 | 2426 | int ata_bus_probe(struct ata_port *ap) |
1da177e4 | 2427 | { |
28ca5c57 | 2428 | unsigned int classes[ATA_MAX_DEVICES]; |
14d2bac1 | 2429 | int tries[ATA_MAX_DEVICES]; |
f58229f8 | 2430 | int rc; |
e82cbdb9 | 2431 | struct ata_device *dev; |
1da177e4 | 2432 | |
28ca5c57 | 2433 | ata_port_probe(ap); |
c19ba8af | 2434 | |
f58229f8 TH |
2435 | ata_link_for_each_dev(dev, &ap->link) |
2436 | tries[dev->devno] = ATA_PROBE_MAX_TRIES; | |
14d2bac1 TH |
2437 | |
2438 | retry: | |
cdeab114 TH |
2439 | ata_link_for_each_dev(dev, &ap->link) { |
2440 | /* If we issue an SRST then an ATA drive (not ATAPI) | |
2441 | * may change configuration and be in PIO0 timing. If | |
2442 | * we do a hard reset (or are coming from power on) | |
2443 | * this is true for ATA or ATAPI. Until we've set a | |
2444 | * suitable controller mode we should not touch the | |
2445 | * bus as we may be talking too fast. | |
2446 | */ | |
2447 | dev->pio_mode = XFER_PIO_0; | |
2448 | ||
2449 | /* If the controller has a pio mode setup function | |
2450 | * then use it to set the chipset to rights. Don't | |
2451 | * touch the DMA setup as that will be dealt with when | |
2452 | * configuring devices. | |
2453 | */ | |
2454 | if (ap->ops->set_piomode) | |
2455 | ap->ops->set_piomode(ap, dev); | |
2456 | } | |
2457 | ||
2044470c | 2458 | /* reset and determine device classes */ |
52783c5d | 2459 | ap->ops->phy_reset(ap); |
2061a47a | 2460 | |
f58229f8 | 2461 | ata_link_for_each_dev(dev, &ap->link) { |
52783c5d TH |
2462 | if (!(ap->flags & ATA_FLAG_DISABLED) && |
2463 | dev->class != ATA_DEV_UNKNOWN) | |
2464 | classes[dev->devno] = dev->class; | |
2465 | else | |
2466 | classes[dev->devno] = ATA_DEV_NONE; | |
2044470c | 2467 | |
52783c5d | 2468 | dev->class = ATA_DEV_UNKNOWN; |
28ca5c57 | 2469 | } |
1da177e4 | 2470 | |
52783c5d | 2471 | ata_port_probe(ap); |
2044470c | 2472 | |
f31f0cc2 JG |
2473 | /* read IDENTIFY page and configure devices. We have to do the identify |
2474 | specific sequence bass-ackwards so that PDIAG- is released by | |
2475 | the slave device */ | |
2476 | ||
f58229f8 TH |
2477 | ata_link_for_each_dev(dev, &ap->link) { |
2478 | if (tries[dev->devno]) | |
2479 | dev->class = classes[dev->devno]; | |
ffeae418 | 2480 | |
14d2bac1 | 2481 | if (!ata_dev_enabled(dev)) |
ffeae418 | 2482 | continue; |
ffeae418 | 2483 | |
bff04647 TH |
2484 | rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
2485 | dev->id); | |
14d2bac1 TH |
2486 | if (rc) |
2487 | goto fail; | |
f31f0cc2 JG |
2488 | } |
2489 | ||
be0d18df AC |
2490 | /* Now ask for the cable type as PDIAG- should have been released */ |
2491 | if (ap->ops->cable_detect) | |
2492 | ap->cbl = ap->ops->cable_detect(ap); | |
2493 | ||
614fe29b AC |
2494 | /* We may have SATA bridge glue hiding here irrespective of the |
2495 | reported cable types and sensed types */ | |
2496 | ata_link_for_each_dev(dev, &ap->link) { | |
2497 | if (!ata_dev_enabled(dev)) | |
2498 | continue; | |
2499 | /* SATA drives indicate we have a bridge. We don't know which | |
2500 | end of the link the bridge is which is a problem */ | |
2501 | if (ata_id_is_sata(dev->id)) | |
2502 | ap->cbl = ATA_CBL_SATA; | |
2503 | } | |
2504 | ||
f31f0cc2 JG |
2505 | /* After the identify sequence we can now set up the devices. We do |
2506 | this in the normal order so that the user doesn't get confused */ | |
2507 | ||
f58229f8 | 2508 | ata_link_for_each_dev(dev, &ap->link) { |
f31f0cc2 JG |
2509 | if (!ata_dev_enabled(dev)) |
2510 | continue; | |
14d2bac1 | 2511 | |
9af5c9c9 | 2512 | ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; |
efdaedc4 | 2513 | rc = ata_dev_configure(dev); |
9af5c9c9 | 2514 | ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; |
14d2bac1 TH |
2515 | if (rc) |
2516 | goto fail; | |
1da177e4 LT |
2517 | } |
2518 | ||
e82cbdb9 | 2519 | /* configure transfer mode */ |
0260731f | 2520 | rc = ata_set_mode(&ap->link, &dev); |
4ae72a1e | 2521 | if (rc) |
51713d35 | 2522 | goto fail; |
1da177e4 | 2523 | |
f58229f8 TH |
2524 | ata_link_for_each_dev(dev, &ap->link) |
2525 | if (ata_dev_enabled(dev)) | |
e82cbdb9 | 2526 | return 0; |
1da177e4 | 2527 | |
e82cbdb9 TH |
2528 | /* no device present, disable port */ |
2529 | ata_port_disable(ap); | |
96072e69 | 2530 | return -ENODEV; |
14d2bac1 TH |
2531 | |
2532 | fail: | |
4ae72a1e TH |
2533 | tries[dev->devno]--; |
2534 | ||
14d2bac1 TH |
2535 | switch (rc) { |
2536 | case -EINVAL: | |
4ae72a1e | 2537 | /* eeek, something went very wrong, give up */ |
14d2bac1 TH |
2538 | tries[dev->devno] = 0; |
2539 | break; | |
4ae72a1e TH |
2540 | |
2541 | case -ENODEV: | |
2542 | /* give it just one more chance */ | |
2543 | tries[dev->devno] = min(tries[dev->devno], 1); | |
14d2bac1 | 2544 | case -EIO: |
4ae72a1e TH |
2545 | if (tries[dev->devno] == 1) { |
2546 | /* This is the last chance, better to slow | |
2547 | * down than lose it. | |
2548 | */ | |
936fd732 | 2549 | sata_down_spd_limit(&ap->link); |
4ae72a1e TH |
2550 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
2551 | } | |
14d2bac1 TH |
2552 | } |
2553 | ||
4ae72a1e | 2554 | if (!tries[dev->devno]) |
3373efd8 | 2555 | ata_dev_disable(dev); |
ec573755 | 2556 | |
14d2bac1 | 2557 | goto retry; |
1da177e4 LT |
2558 | } |
2559 | ||
2560 | /** | |
0cba632b JG |
2561 | * ata_port_probe - Mark port as enabled |
2562 | * @ap: Port for which we indicate enablement | |
1da177e4 | 2563 | * |
0cba632b JG |
2564 | * Modify @ap data structure such that the system |
2565 | * thinks that the entire port is enabled. | |
2566 | * | |
cca3974e | 2567 | * LOCKING: host lock, or some other form of |
0cba632b | 2568 | * serialization. |
1da177e4 LT |
2569 | */ |
2570 | ||
2571 | void ata_port_probe(struct ata_port *ap) | |
2572 | { | |
198e0fed | 2573 | ap->flags &= ~ATA_FLAG_DISABLED; |
1da177e4 LT |
2574 | } |
2575 | ||
3be680b7 TH |
2576 | /** |
2577 | * sata_print_link_status - Print SATA link status | |
936fd732 | 2578 | * @link: SATA link to printk link status about |
3be680b7 TH |
2579 | * |
2580 | * This function prints link speed and status of a SATA link. | |
2581 | * | |
2582 | * LOCKING: | |
2583 | * None. | |
2584 | */ | |
936fd732 | 2585 | void sata_print_link_status(struct ata_link *link) |
3be680b7 | 2586 | { |
6d5f9732 | 2587 | u32 sstatus, scontrol, tmp; |
3be680b7 | 2588 | |
936fd732 | 2589 | if (sata_scr_read(link, SCR_STATUS, &sstatus)) |
3be680b7 | 2590 | return; |
936fd732 | 2591 | sata_scr_read(link, SCR_CONTROL, &scontrol); |
3be680b7 | 2592 | |
936fd732 | 2593 | if (ata_link_online(link)) { |
3be680b7 | 2594 | tmp = (sstatus >> 4) & 0xf; |
936fd732 | 2595 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2596 | "SATA link up %s (SStatus %X SControl %X)\n", |
2597 | sata_spd_string(tmp), sstatus, scontrol); | |
3be680b7 | 2598 | } else { |
936fd732 | 2599 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2600 | "SATA link down (SStatus %X SControl %X)\n", |
2601 | sstatus, scontrol); | |
3be680b7 TH |
2602 | } |
2603 | } | |
2604 | ||
ebdfca6e AC |
2605 | /** |
2606 | * ata_dev_pair - return other device on cable | |
ebdfca6e AC |
2607 | * @adev: device |
2608 | * | |
2609 | * Obtain the other device on the same cable, or if none is | |
2610 | * present NULL is returned | |
2611 | */ | |
2e9edbf8 | 2612 | |
3373efd8 | 2613 | struct ata_device *ata_dev_pair(struct ata_device *adev) |
ebdfca6e | 2614 | { |
9af5c9c9 TH |
2615 | struct ata_link *link = adev->link; |
2616 | struct ata_device *pair = &link->device[1 - adev->devno]; | |
e1211e3f | 2617 | if (!ata_dev_enabled(pair)) |
ebdfca6e AC |
2618 | return NULL; |
2619 | return pair; | |
2620 | } | |
2621 | ||
1da177e4 | 2622 | /** |
780a87f7 JG |
2623 | * ata_port_disable - Disable port. |
2624 | * @ap: Port to be disabled. | |
1da177e4 | 2625 | * |
780a87f7 JG |
2626 | * Modify @ap data structure such that the system |
2627 | * thinks that the entire port is disabled, and should | |
2628 | * never attempt to probe or communicate with devices | |
2629 | * on this port. | |
2630 | * | |
cca3974e | 2631 | * LOCKING: host lock, or some other form of |
780a87f7 | 2632 | * serialization. |
1da177e4 LT |
2633 | */ |
2634 | ||
2635 | void ata_port_disable(struct ata_port *ap) | |
2636 | { | |
9af5c9c9 TH |
2637 | ap->link.device[0].class = ATA_DEV_NONE; |
2638 | ap->link.device[1].class = ATA_DEV_NONE; | |
198e0fed | 2639 | ap->flags |= ATA_FLAG_DISABLED; |
1da177e4 LT |
2640 | } |
2641 | ||
1c3fae4d | 2642 | /** |
3c567b7d | 2643 | * sata_down_spd_limit - adjust SATA spd limit downward |
936fd732 | 2644 | * @link: Link to adjust SATA spd limit for |
1c3fae4d | 2645 | * |
936fd732 | 2646 | * Adjust SATA spd limit of @link downward. Note that this |
1c3fae4d | 2647 | * function only adjusts the limit. The change must be applied |
3c567b7d | 2648 | * using sata_set_spd(). |
1c3fae4d TH |
2649 | * |
2650 | * LOCKING: | |
2651 | * Inherited from caller. | |
2652 | * | |
2653 | * RETURNS: | |
2654 | * 0 on success, negative errno on failure | |
2655 | */ | |
936fd732 | 2656 | int sata_down_spd_limit(struct ata_link *link) |
1c3fae4d | 2657 | { |
81952c54 TH |
2658 | u32 sstatus, spd, mask; |
2659 | int rc, highbit; | |
1c3fae4d | 2660 | |
936fd732 | 2661 | if (!sata_scr_valid(link)) |
008a7896 TH |
2662 | return -EOPNOTSUPP; |
2663 | ||
2664 | /* If SCR can be read, use it to determine the current SPD. | |
936fd732 | 2665 | * If not, use cached value in link->sata_spd. |
008a7896 | 2666 | */ |
936fd732 | 2667 | rc = sata_scr_read(link, SCR_STATUS, &sstatus); |
008a7896 TH |
2668 | if (rc == 0) |
2669 | spd = (sstatus >> 4) & 0xf; | |
2670 | else | |
936fd732 | 2671 | spd = link->sata_spd; |
1c3fae4d | 2672 | |
936fd732 | 2673 | mask = link->sata_spd_limit; |
1c3fae4d TH |
2674 | if (mask <= 1) |
2675 | return -EINVAL; | |
008a7896 TH |
2676 | |
2677 | /* unconditionally mask off the highest bit */ | |
1c3fae4d TH |
2678 | highbit = fls(mask) - 1; |
2679 | mask &= ~(1 << highbit); | |
2680 | ||
008a7896 TH |
2681 | /* Mask off all speeds higher than or equal to the current |
2682 | * one. Force 1.5Gbps if current SPD is not available. | |
2683 | */ | |
2684 | if (spd > 1) | |
2685 | mask &= (1 << (spd - 1)) - 1; | |
2686 | else | |
2687 | mask &= 1; | |
2688 | ||
2689 | /* were we already at the bottom? */ | |
1c3fae4d TH |
2690 | if (!mask) |
2691 | return -EINVAL; | |
2692 | ||
936fd732 | 2693 | link->sata_spd_limit = mask; |
1c3fae4d | 2694 | |
936fd732 | 2695 | ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", |
f15a1daf | 2696 | sata_spd_string(fls(mask))); |
1c3fae4d TH |
2697 | |
2698 | return 0; | |
2699 | } | |
2700 | ||
936fd732 | 2701 | static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) |
1c3fae4d | 2702 | { |
5270222f TH |
2703 | struct ata_link *host_link = &link->ap->link; |
2704 | u32 limit, target, spd; | |
1c3fae4d | 2705 | |
5270222f TH |
2706 | limit = link->sata_spd_limit; |
2707 | ||
2708 | /* Don't configure downstream link faster than upstream link. | |
2709 | * It doesn't speed up anything and some PMPs choke on such | |
2710 | * configuration. | |
2711 | */ | |
2712 | if (!ata_is_host_link(link) && host_link->sata_spd) | |
2713 | limit &= (1 << host_link->sata_spd) - 1; | |
2714 | ||
2715 | if (limit == UINT_MAX) | |
2716 | target = 0; | |
1c3fae4d | 2717 | else |
5270222f | 2718 | target = fls(limit); |
1c3fae4d TH |
2719 | |
2720 | spd = (*scontrol >> 4) & 0xf; | |
5270222f | 2721 | *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4); |
1c3fae4d | 2722 | |
5270222f | 2723 | return spd != target; |
1c3fae4d TH |
2724 | } |
2725 | ||
2726 | /** | |
3c567b7d | 2727 | * sata_set_spd_needed - is SATA spd configuration needed |
936fd732 | 2728 | * @link: Link in question |
1c3fae4d TH |
2729 | * |
2730 | * Test whether the spd limit in SControl matches | |
936fd732 | 2731 | * @link->sata_spd_limit. This function is used to determine |
1c3fae4d TH |
2732 | * whether hardreset is necessary to apply SATA spd |
2733 | * configuration. | |
2734 | * | |
2735 | * LOCKING: | |
2736 | * Inherited from caller. | |
2737 | * | |
2738 | * RETURNS: | |
2739 | * 1 if SATA spd configuration is needed, 0 otherwise. | |
2740 | */ | |
936fd732 | 2741 | int sata_set_spd_needed(struct ata_link *link) |
1c3fae4d TH |
2742 | { |
2743 | u32 scontrol; | |
2744 | ||
936fd732 | 2745 | if (sata_scr_read(link, SCR_CONTROL, &scontrol)) |
db64bcf3 | 2746 | return 1; |
1c3fae4d | 2747 | |
936fd732 | 2748 | return __sata_set_spd_needed(link, &scontrol); |
1c3fae4d TH |
2749 | } |
2750 | ||
2751 | /** | |
3c567b7d | 2752 | * sata_set_spd - set SATA spd according to spd limit |
936fd732 | 2753 | * @link: Link to set SATA spd for |
1c3fae4d | 2754 | * |
936fd732 | 2755 | * Set SATA spd of @link according to sata_spd_limit. |
1c3fae4d TH |
2756 | * |
2757 | * LOCKING: | |
2758 | * Inherited from caller. | |
2759 | * | |
2760 | * RETURNS: | |
2761 | * 0 if spd doesn't need to be changed, 1 if spd has been | |
81952c54 | 2762 | * changed. Negative errno if SCR registers are inaccessible. |
1c3fae4d | 2763 | */ |
936fd732 | 2764 | int sata_set_spd(struct ata_link *link) |
1c3fae4d TH |
2765 | { |
2766 | u32 scontrol; | |
81952c54 | 2767 | int rc; |
1c3fae4d | 2768 | |
936fd732 | 2769 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 2770 | return rc; |
1c3fae4d | 2771 | |
936fd732 | 2772 | if (!__sata_set_spd_needed(link, &scontrol)) |
1c3fae4d TH |
2773 | return 0; |
2774 | ||
936fd732 | 2775 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 TH |
2776 | return rc; |
2777 | ||
1c3fae4d TH |
2778 | return 1; |
2779 | } | |
2780 | ||
452503f9 AC |
2781 | /* |
2782 | * This mode timing computation functionality is ported over from | |
2783 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
2784 | */ | |
2785 | /* | |
b352e57d | 2786 | * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). |
452503f9 | 2787 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
b352e57d AC |
2788 | * for UDMA6, which is currently supported only by Maxtor drives. |
2789 | * | |
2790 | * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. | |
452503f9 AC |
2791 | */ |
2792 | ||
2793 | static const struct ata_timing ata_timing[] = { | |
2794 | ||
2795 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
2796 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
2797 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
2798 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
2799 | ||
b352e57d AC |
2800 | { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, |
2801 | { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, | |
452503f9 AC |
2802 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, |
2803 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
2804 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, | |
2805 | ||
2806 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
2e9edbf8 | 2807 | |
452503f9 AC |
2808 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, |
2809 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, | |
2810 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, | |
2e9edbf8 | 2811 | |
452503f9 AC |
2812 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, |
2813 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, | |
2814 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, | |
2815 | ||
b352e57d AC |
2816 | { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, |
2817 | { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, | |
452503f9 AC |
2818 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, |
2819 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, | |
2820 | ||
2821 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, | |
2822 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, | |
2823 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, | |
2824 | ||
2825 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ | |
2826 | ||
2827 | { 0xFF } | |
2828 | }; | |
2829 | ||
2dcb407e JG |
2830 | #define ENOUGH(v, unit) (((v)-1)/(unit)+1) |
2831 | #define EZ(v, unit) ((v)?ENOUGH(v, unit):0) | |
452503f9 AC |
2832 | |
2833 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
2834 | { | |
2835 | q->setup = EZ(t->setup * 1000, T); | |
2836 | q->act8b = EZ(t->act8b * 1000, T); | |
2837 | q->rec8b = EZ(t->rec8b * 1000, T); | |
2838 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
2839 | q->active = EZ(t->active * 1000, T); | |
2840 | q->recover = EZ(t->recover * 1000, T); | |
2841 | q->cycle = EZ(t->cycle * 1000, T); | |
2842 | q->udma = EZ(t->udma * 1000, UT); | |
2843 | } | |
2844 | ||
2845 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
2846 | struct ata_timing *m, unsigned int what) | |
2847 | { | |
2848 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
2849 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
2850 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
2851 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
2852 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
2853 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
2854 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); | |
2855 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
2856 | } | |
2857 | ||
2dcb407e | 2858 | static const struct ata_timing *ata_timing_find_mode(unsigned short speed) |
452503f9 AC |
2859 | { |
2860 | const struct ata_timing *t; | |
2861 | ||
2862 | for (t = ata_timing; t->mode != speed; t++) | |
91190758 | 2863 | if (t->mode == 0xFF) |
452503f9 | 2864 | return NULL; |
2e9edbf8 | 2865 | return t; |
452503f9 AC |
2866 | } |
2867 | ||
2868 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
2869 | struct ata_timing *t, int T, int UT) | |
2870 | { | |
2871 | const struct ata_timing *s; | |
2872 | struct ata_timing p; | |
2873 | ||
2874 | /* | |
2e9edbf8 | 2875 | * Find the mode. |
75b1f2f8 | 2876 | */ |
452503f9 AC |
2877 | |
2878 | if (!(s = ata_timing_find_mode(speed))) | |
2879 | return -EINVAL; | |
2880 | ||
75b1f2f8 AL |
2881 | memcpy(t, s, sizeof(*s)); |
2882 | ||
452503f9 AC |
2883 | /* |
2884 | * If the drive is an EIDE drive, it can tell us it needs extended | |
2885 | * PIO/MW_DMA cycle timing. | |
2886 | */ | |
2887 | ||
2888 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ | |
2889 | memset(&p, 0, sizeof(p)); | |
2dcb407e | 2890 | if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { |
452503f9 AC |
2891 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; |
2892 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; | |
2dcb407e | 2893 | } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { |
452503f9 AC |
2894 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; |
2895 | } | |
2896 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); | |
2897 | } | |
2898 | ||
2899 | /* | |
2900 | * Convert the timing to bus clock counts. | |
2901 | */ | |
2902 | ||
75b1f2f8 | 2903 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
2904 | |
2905 | /* | |
c893a3ae RD |
2906 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
2907 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
2908 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
2909 | */ |
2910 | ||
fd3367af | 2911 | if (speed > XFER_PIO_6) { |
452503f9 AC |
2912 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
2913 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
2914 | } | |
2915 | ||
2916 | /* | |
c893a3ae | 2917 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
2918 | */ |
2919 | ||
2920 | if (t->act8b + t->rec8b < t->cyc8b) { | |
2921 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
2922 | t->rec8b = t->cyc8b - t->act8b; | |
2923 | } | |
2924 | ||
2925 | if (t->active + t->recover < t->cycle) { | |
2926 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
2927 | t->recover = t->cycle - t->active; | |
2928 | } | |
a617c09f | 2929 | |
4f701d1e AC |
2930 | /* In a few cases quantisation may produce enough errors to |
2931 | leave t->cycle too low for the sum of active and recovery | |
2932 | if so we must correct this */ | |
2933 | if (t->active + t->recover > t->cycle) | |
2934 | t->cycle = t->active + t->recover; | |
452503f9 AC |
2935 | |
2936 | return 0; | |
2937 | } | |
2938 | ||
cf176e1a TH |
2939 | /** |
2940 | * ata_down_xfermask_limit - adjust dev xfer masks downward | |
cf176e1a | 2941 | * @dev: Device to adjust xfer masks |
458337db | 2942 | * @sel: ATA_DNXFER_* selector |
cf176e1a TH |
2943 | * |
2944 | * Adjust xfer masks of @dev downward. Note that this function | |
2945 | * does not apply the change. Invoking ata_set_mode() afterwards | |
2946 | * will apply the limit. | |
2947 | * | |
2948 | * LOCKING: | |
2949 | * Inherited from caller. | |
2950 | * | |
2951 | * RETURNS: | |
2952 | * 0 on success, negative errno on failure | |
2953 | */ | |
458337db | 2954 | int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
cf176e1a | 2955 | { |
458337db TH |
2956 | char buf[32]; |
2957 | unsigned int orig_mask, xfer_mask; | |
2958 | unsigned int pio_mask, mwdma_mask, udma_mask; | |
2959 | int quiet, highbit; | |
cf176e1a | 2960 | |
458337db TH |
2961 | quiet = !!(sel & ATA_DNXFER_QUIET); |
2962 | sel &= ~ATA_DNXFER_QUIET; | |
cf176e1a | 2963 | |
458337db TH |
2964 | xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
2965 | dev->mwdma_mask, | |
2966 | dev->udma_mask); | |
2967 | ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); | |
cf176e1a | 2968 | |
458337db TH |
2969 | switch (sel) { |
2970 | case ATA_DNXFER_PIO: | |
2971 | highbit = fls(pio_mask) - 1; | |
2972 | pio_mask &= ~(1 << highbit); | |
2973 | break; | |
2974 | ||
2975 | case ATA_DNXFER_DMA: | |
2976 | if (udma_mask) { | |
2977 | highbit = fls(udma_mask) - 1; | |
2978 | udma_mask &= ~(1 << highbit); | |
2979 | if (!udma_mask) | |
2980 | return -ENOENT; | |
2981 | } else if (mwdma_mask) { | |
2982 | highbit = fls(mwdma_mask) - 1; | |
2983 | mwdma_mask &= ~(1 << highbit); | |
2984 | if (!mwdma_mask) | |
2985 | return -ENOENT; | |
2986 | } | |
2987 | break; | |
2988 | ||
2989 | case ATA_DNXFER_40C: | |
2990 | udma_mask &= ATA_UDMA_MASK_40C; | |
2991 | break; | |
2992 | ||
2993 | case ATA_DNXFER_FORCE_PIO0: | |
2994 | pio_mask &= 1; | |
2995 | case ATA_DNXFER_FORCE_PIO: | |
2996 | mwdma_mask = 0; | |
2997 | udma_mask = 0; | |
2998 | break; | |
2999 | ||
458337db TH |
3000 | default: |
3001 | BUG(); | |
3002 | } | |
3003 | ||
3004 | xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
3005 | ||
3006 | if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) | |
3007 | return -ENOENT; | |
3008 | ||
3009 | if (!quiet) { | |
3010 | if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) | |
3011 | snprintf(buf, sizeof(buf), "%s:%s", | |
3012 | ata_mode_string(xfer_mask), | |
3013 | ata_mode_string(xfer_mask & ATA_MASK_PIO)); | |
3014 | else | |
3015 | snprintf(buf, sizeof(buf), "%s", | |
3016 | ata_mode_string(xfer_mask)); | |
3017 | ||
3018 | ata_dev_printk(dev, KERN_WARNING, | |
3019 | "limiting speed to %s\n", buf); | |
3020 | } | |
cf176e1a TH |
3021 | |
3022 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, | |
3023 | &dev->udma_mask); | |
3024 | ||
cf176e1a | 3025 | return 0; |
cf176e1a TH |
3026 | } |
3027 | ||
3373efd8 | 3028 | static int ata_dev_set_mode(struct ata_device *dev) |
1da177e4 | 3029 | { |
9af5c9c9 | 3030 | struct ata_eh_context *ehc = &dev->link->eh_context; |
83206a29 TH |
3031 | unsigned int err_mask; |
3032 | int rc; | |
1da177e4 | 3033 | |
e8384607 | 3034 | dev->flags &= ~ATA_DFLAG_PIO; |
1da177e4 LT |
3035 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
3036 | dev->flags |= ATA_DFLAG_PIO; | |
3037 | ||
3373efd8 | 3038 | err_mask = ata_dev_set_xfermode(dev); |
2dcb407e | 3039 | |
11750a40 AC |
3040 | /* Old CFA may refuse this command, which is just fine */ |
3041 | if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) | |
2dcb407e JG |
3042 | err_mask &= ~AC_ERR_DEV; |
3043 | ||
0bc2a79a AC |
3044 | /* Some very old devices and some bad newer ones fail any kind of |
3045 | SET_XFERMODE request but support PIO0-2 timings and no IORDY */ | |
3046 | if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) && | |
3047 | dev->pio_mode <= XFER_PIO_2) | |
3048 | err_mask &= ~AC_ERR_DEV; | |
2dcb407e | 3049 | |
3acaf94b AC |
3050 | /* Early MWDMA devices do DMA but don't allow DMA mode setting. |
3051 | Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ | |
3052 | if (dev->xfer_shift == ATA_SHIFT_MWDMA && | |
3053 | dev->dma_mode == XFER_MW_DMA_0 && | |
3054 | (dev->id[63] >> 8) & 1) | |
3055 | err_mask &= ~AC_ERR_DEV; | |
3056 | ||
83206a29 | 3057 | if (err_mask) { |
f15a1daf TH |
3058 | ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " |
3059 | "(err_mask=0x%x)\n", err_mask); | |
83206a29 TH |
3060 | return -EIO; |
3061 | } | |
1da177e4 | 3062 | |
baa1e78a | 3063 | ehc->i.flags |= ATA_EHI_POST_SETMODE; |
422c9daa | 3064 | rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); |
baa1e78a | 3065 | ehc->i.flags &= ~ATA_EHI_POST_SETMODE; |
5eb45c02 | 3066 | if (rc) |
83206a29 | 3067 | return rc; |
48a8a14f | 3068 | |
23e71c3d TH |
3069 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
3070 | dev->xfer_shift, (int)dev->xfer_mode); | |
1da177e4 | 3071 | |
f15a1daf TH |
3072 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", |
3073 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); | |
83206a29 | 3074 | return 0; |
1da177e4 LT |
3075 | } |
3076 | ||
1da177e4 | 3077 | /** |
04351821 | 3078 | * ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
0260731f | 3079 | * @link: link on which timings will be programmed |
e82cbdb9 | 3080 | * @r_failed_dev: out paramter for failed device |
1da177e4 | 3081 | * |
04351821 AC |
3082 | * Standard implementation of the function used to tune and set |
3083 | * ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3084 | * ata_dev_set_mode() fails, pointer to the failing device is | |
e82cbdb9 | 3085 | * returned in @r_failed_dev. |
780a87f7 | 3086 | * |
1da177e4 | 3087 | * LOCKING: |
0cba632b | 3088 | * PCI/etc. bus probe sem. |
e82cbdb9 TH |
3089 | * |
3090 | * RETURNS: | |
3091 | * 0 on success, negative errno otherwise | |
1da177e4 | 3092 | */ |
04351821 | 3093 | |
0260731f | 3094 | int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
1da177e4 | 3095 | { |
0260731f | 3096 | struct ata_port *ap = link->ap; |
e8e0619f | 3097 | struct ata_device *dev; |
f58229f8 | 3098 | int rc = 0, used_dma = 0, found = 0; |
3adcebb2 | 3099 | |
a6d5a51c | 3100 | /* step 1: calculate xfer_mask */ |
f58229f8 | 3101 | ata_link_for_each_dev(dev, link) { |
acf356b1 | 3102 | unsigned int pio_mask, dma_mask; |
b3a70601 | 3103 | unsigned int mode_mask; |
a6d5a51c | 3104 | |
e1211e3f | 3105 | if (!ata_dev_enabled(dev)) |
a6d5a51c TH |
3106 | continue; |
3107 | ||
b3a70601 AC |
3108 | mode_mask = ATA_DMA_MASK_ATA; |
3109 | if (dev->class == ATA_DEV_ATAPI) | |
3110 | mode_mask = ATA_DMA_MASK_ATAPI; | |
3111 | else if (ata_id_is_cfa(dev->id)) | |
3112 | mode_mask = ATA_DMA_MASK_CFA; | |
3113 | ||
3373efd8 | 3114 | ata_dev_xfermask(dev); |
1da177e4 | 3115 | |
acf356b1 TH |
3116 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
3117 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
b3a70601 AC |
3118 | |
3119 | if (libata_dma_mask & mode_mask) | |
3120 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
3121 | else | |
3122 | dma_mask = 0; | |
3123 | ||
acf356b1 TH |
3124 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); |
3125 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
5444a6f4 | 3126 | |
4f65977d | 3127 | found = 1; |
5444a6f4 AC |
3128 | if (dev->dma_mode) |
3129 | used_dma = 1; | |
a6d5a51c | 3130 | } |
4f65977d | 3131 | if (!found) |
e82cbdb9 | 3132 | goto out; |
a6d5a51c TH |
3133 | |
3134 | /* step 2: always set host PIO timings */ | |
f58229f8 | 3135 | ata_link_for_each_dev(dev, link) { |
e8e0619f TH |
3136 | if (!ata_dev_enabled(dev)) |
3137 | continue; | |
3138 | ||
3139 | if (!dev->pio_mode) { | |
f15a1daf | 3140 | ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); |
e8e0619f | 3141 | rc = -EINVAL; |
e82cbdb9 | 3142 | goto out; |
e8e0619f TH |
3143 | } |
3144 | ||
3145 | dev->xfer_mode = dev->pio_mode; | |
3146 | dev->xfer_shift = ATA_SHIFT_PIO; | |
3147 | if (ap->ops->set_piomode) | |
3148 | ap->ops->set_piomode(ap, dev); | |
3149 | } | |
1da177e4 | 3150 | |
a6d5a51c | 3151 | /* step 3: set host DMA timings */ |
f58229f8 | 3152 | ata_link_for_each_dev(dev, link) { |
e8e0619f TH |
3153 | if (!ata_dev_enabled(dev) || !dev->dma_mode) |
3154 | continue; | |
3155 | ||
3156 | dev->xfer_mode = dev->dma_mode; | |
3157 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
3158 | if (ap->ops->set_dmamode) | |
3159 | ap->ops->set_dmamode(ap, dev); | |
3160 | } | |
1da177e4 LT |
3161 | |
3162 | /* step 4: update devices' xfer mode */ | |
f58229f8 | 3163 | ata_link_for_each_dev(dev, link) { |
18d90deb | 3164 | /* don't update suspended devices' xfer mode */ |
9666f400 | 3165 | if (!ata_dev_enabled(dev)) |
83206a29 TH |
3166 | continue; |
3167 | ||
3373efd8 | 3168 | rc = ata_dev_set_mode(dev); |
5bbc53f4 | 3169 | if (rc) |
e82cbdb9 | 3170 | goto out; |
83206a29 | 3171 | } |
1da177e4 | 3172 | |
e8e0619f TH |
3173 | /* Record simplex status. If we selected DMA then the other |
3174 | * host channels are not permitted to do so. | |
5444a6f4 | 3175 | */ |
cca3974e | 3176 | if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
032af1ce | 3177 | ap->host->simplex_claimed = ap; |
5444a6f4 | 3178 | |
e82cbdb9 TH |
3179 | out: |
3180 | if (rc) | |
3181 | *r_failed_dev = dev; | |
3182 | return rc; | |
1da177e4 LT |
3183 | } |
3184 | ||
04351821 AC |
3185 | /** |
3186 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
0260731f | 3187 | * @link: link on which timings will be programmed |
04351821 AC |
3188 | * @r_failed_dev: out paramter for failed device |
3189 | * | |
3190 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3191 | * ata_set_mode() fails, pointer to the failing device is | |
3192 | * returned in @r_failed_dev. | |
3193 | * | |
3194 | * LOCKING: | |
3195 | * PCI/etc. bus probe sem. | |
3196 | * | |
3197 | * RETURNS: | |
3198 | * 0 on success, negative errno otherwise | |
3199 | */ | |
0260731f | 3200 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
04351821 | 3201 | { |
0260731f TH |
3202 | struct ata_port *ap = link->ap; |
3203 | ||
04351821 AC |
3204 | /* has private set_mode? */ |
3205 | if (ap->ops->set_mode) | |
0260731f TH |
3206 | return ap->ops->set_mode(link, r_failed_dev); |
3207 | return ata_do_set_mode(link, r_failed_dev); | |
04351821 AC |
3208 | } |
3209 | ||
1fdffbce JG |
3210 | /** |
3211 | * ata_tf_to_host - issue ATA taskfile to host controller | |
3212 | * @ap: port to which command is being issued | |
3213 | * @tf: ATA taskfile register set | |
3214 | * | |
3215 | * Issues ATA taskfile register set to ATA host controller, | |
3216 | * with proper synchronization with interrupt handler and | |
3217 | * other threads. | |
3218 | * | |
3219 | * LOCKING: | |
cca3974e | 3220 | * spin_lock_irqsave(host lock) |
1fdffbce JG |
3221 | */ |
3222 | ||
3223 | static inline void ata_tf_to_host(struct ata_port *ap, | |
3224 | const struct ata_taskfile *tf) | |
3225 | { | |
3226 | ap->ops->tf_load(ap, tf); | |
3227 | ap->ops->exec_command(ap, tf); | |
3228 | } | |
3229 | ||
1da177e4 LT |
3230 | /** |
3231 | * ata_busy_sleep - sleep until BSY clears, or timeout | |
3232 | * @ap: port containing status register to be polled | |
3233 | * @tmout_pat: impatience timeout | |
3234 | * @tmout: overall timeout | |
3235 | * | |
780a87f7 JG |
3236 | * Sleep until ATA Status register bit BSY clears, |
3237 | * or a timeout occurs. | |
3238 | * | |
d1adc1bb TH |
3239 | * LOCKING: |
3240 | * Kernel thread context (may sleep). | |
3241 | * | |
3242 | * RETURNS: | |
3243 | * 0 on success, -errno otherwise. | |
1da177e4 | 3244 | */ |
d1adc1bb TH |
3245 | int ata_busy_sleep(struct ata_port *ap, |
3246 | unsigned long tmout_pat, unsigned long tmout) | |
1da177e4 LT |
3247 | { |
3248 | unsigned long timer_start, timeout; | |
3249 | u8 status; | |
3250 | ||
3251 | status = ata_busy_wait(ap, ATA_BUSY, 300); | |
3252 | timer_start = jiffies; | |
3253 | timeout = timer_start + tmout_pat; | |
d1adc1bb TH |
3254 | while (status != 0xff && (status & ATA_BUSY) && |
3255 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
3256 | msleep(50); |
3257 | status = ata_busy_wait(ap, ATA_BUSY, 3); | |
3258 | } | |
3259 | ||
d1adc1bb | 3260 | if (status != 0xff && (status & ATA_BUSY)) |
f15a1daf | 3261 | ata_port_printk(ap, KERN_WARNING, |
35aa7a43 JG |
3262 | "port is slow to respond, please be patient " |
3263 | "(Status 0x%x)\n", status); | |
1da177e4 LT |
3264 | |
3265 | timeout = timer_start + tmout; | |
d1adc1bb TH |
3266 | while (status != 0xff && (status & ATA_BUSY) && |
3267 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
3268 | msleep(50); |
3269 | status = ata_chk_status(ap); | |
3270 | } | |
3271 | ||
d1adc1bb TH |
3272 | if (status == 0xff) |
3273 | return -ENODEV; | |
3274 | ||
1da177e4 | 3275 | if (status & ATA_BUSY) { |
f15a1daf | 3276 | ata_port_printk(ap, KERN_ERR, "port failed to respond " |
35aa7a43 JG |
3277 | "(%lu secs, Status 0x%x)\n", |
3278 | tmout / HZ, status); | |
d1adc1bb | 3279 | return -EBUSY; |
1da177e4 LT |
3280 | } |
3281 | ||
3282 | return 0; | |
3283 | } | |
3284 | ||
88ff6eaf TH |
3285 | /** |
3286 | * ata_wait_after_reset - wait before checking status after reset | |
3287 | * @ap: port containing status register to be polled | |
3288 | * @deadline: deadline jiffies for the operation | |
3289 | * | |
3290 | * After reset, we need to pause a while before reading status. | |
3291 | * Also, certain combination of controller and device report 0xff | |
3292 | * for some duration (e.g. until SATA PHY is up and running) | |
3293 | * which is interpreted as empty port in ATA world. This | |
3294 | * function also waits for such devices to get out of 0xff | |
3295 | * status. | |
3296 | * | |
3297 | * LOCKING: | |
3298 | * Kernel thread context (may sleep). | |
3299 | */ | |
3300 | void ata_wait_after_reset(struct ata_port *ap, unsigned long deadline) | |
3301 | { | |
3302 | unsigned long until = jiffies + ATA_TMOUT_FF_WAIT; | |
3303 | ||
3304 | if (time_before(until, deadline)) | |
3305 | deadline = until; | |
3306 | ||
3307 | /* Spec mandates ">= 2ms" before checking status. We wait | |
3308 | * 150ms, because that was the magic delay used for ATAPI | |
3309 | * devices in Hale Landis's ATADRVR, for the period of time | |
3310 | * between when the ATA command register is written, and then | |
3311 | * status is checked. Because waiting for "a while" before | |
3312 | * checking status is fine, post SRST, we perform this magic | |
3313 | * delay here as well. | |
3314 | * | |
3315 | * Old drivers/ide uses the 2mS rule and then waits for ready. | |
3316 | */ | |
3317 | msleep(150); | |
3318 | ||
3319 | /* Wait for 0xff to clear. Some SATA devices take a long time | |
3320 | * to clear 0xff after reset. For example, HHD424020F7SV00 | |
3321 | * iVDR needs >= 800ms while. Quantum GoVault needs even more | |
3322 | * than that. | |
1974e201 TH |
3323 | * |
3324 | * Note that some PATA controllers (pata_ali) explode if | |
3325 | * status register is read more than once when there's no | |
3326 | * device attached. | |
88ff6eaf | 3327 | */ |
1974e201 TH |
3328 | if (ap->flags & ATA_FLAG_SATA) { |
3329 | while (1) { | |
3330 | u8 status = ata_chk_status(ap); | |
88ff6eaf | 3331 | |
1974e201 TH |
3332 | if (status != 0xff || time_after(jiffies, deadline)) |
3333 | return; | |
88ff6eaf | 3334 | |
1974e201 TH |
3335 | msleep(50); |
3336 | } | |
88ff6eaf TH |
3337 | } |
3338 | } | |
3339 | ||
d4b2bab4 TH |
3340 | /** |
3341 | * ata_wait_ready - sleep until BSY clears, or timeout | |
3342 | * @ap: port containing status register to be polled | |
3343 | * @deadline: deadline jiffies for the operation | |
3344 | * | |
3345 | * Sleep until ATA Status register bit BSY clears, or timeout | |
3346 | * occurs. | |
3347 | * | |
3348 | * LOCKING: | |
3349 | * Kernel thread context (may sleep). | |
3350 | * | |
3351 | * RETURNS: | |
3352 | * 0 on success, -errno otherwise. | |
3353 | */ | |
3354 | int ata_wait_ready(struct ata_port *ap, unsigned long deadline) | |
3355 | { | |
3356 | unsigned long start = jiffies; | |
3357 | int warned = 0; | |
3358 | ||
3359 | while (1) { | |
3360 | u8 status = ata_chk_status(ap); | |
3361 | unsigned long now = jiffies; | |
3362 | ||
3363 | if (!(status & ATA_BUSY)) | |
3364 | return 0; | |
936fd732 | 3365 | if (!ata_link_online(&ap->link) && status == 0xff) |
d4b2bab4 TH |
3366 | return -ENODEV; |
3367 | if (time_after(now, deadline)) | |
3368 | return -EBUSY; | |
3369 | ||
3370 | if (!warned && time_after(now, start + 5 * HZ) && | |
3371 | (deadline - now > 3 * HZ)) { | |
3372 | ata_port_printk(ap, KERN_WARNING, | |
3373 | "port is slow to respond, please be patient " | |
3374 | "(Status 0x%x)\n", status); | |
3375 | warned = 1; | |
3376 | } | |
3377 | ||
3378 | msleep(50); | |
3379 | } | |
3380 | } | |
3381 | ||
3382 | static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask, | |
3383 | unsigned long deadline) | |
1da177e4 LT |
3384 | { |
3385 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
3386 | unsigned int dev0 = devmask & (1 << 0); | |
3387 | unsigned int dev1 = devmask & (1 << 1); | |
9b89391c | 3388 | int rc, ret = 0; |
1da177e4 LT |
3389 | |
3390 | /* if device 0 was found in ata_devchk, wait for its | |
3391 | * BSY bit to clear | |
3392 | */ | |
d4b2bab4 TH |
3393 | if (dev0) { |
3394 | rc = ata_wait_ready(ap, deadline); | |
9b89391c TH |
3395 | if (rc) { |
3396 | if (rc != -ENODEV) | |
3397 | return rc; | |
3398 | ret = rc; | |
3399 | } | |
d4b2bab4 | 3400 | } |
1da177e4 | 3401 | |
e141d999 TH |
3402 | /* if device 1 was found in ata_devchk, wait for register |
3403 | * access briefly, then wait for BSY to clear. | |
1da177e4 | 3404 | */ |
e141d999 TH |
3405 | if (dev1) { |
3406 | int i; | |
1da177e4 LT |
3407 | |
3408 | ap->ops->dev_select(ap, 1); | |
e141d999 TH |
3409 | |
3410 | /* Wait for register access. Some ATAPI devices fail | |
3411 | * to set nsect/lbal after reset, so don't waste too | |
3412 | * much time on it. We're gonna wait for !BSY anyway. | |
3413 | */ | |
3414 | for (i = 0; i < 2; i++) { | |
3415 | u8 nsect, lbal; | |
3416 | ||
3417 | nsect = ioread8(ioaddr->nsect_addr); | |
3418 | lbal = ioread8(ioaddr->lbal_addr); | |
3419 | if ((nsect == 1) && (lbal == 1)) | |
3420 | break; | |
3421 | msleep(50); /* give drive a breather */ | |
3422 | } | |
3423 | ||
d4b2bab4 | 3424 | rc = ata_wait_ready(ap, deadline); |
9b89391c TH |
3425 | if (rc) { |
3426 | if (rc != -ENODEV) | |
3427 | return rc; | |
3428 | ret = rc; | |
3429 | } | |
d4b2bab4 | 3430 | } |
1da177e4 LT |
3431 | |
3432 | /* is all this really necessary? */ | |
3433 | ap->ops->dev_select(ap, 0); | |
3434 | if (dev1) | |
3435 | ap->ops->dev_select(ap, 1); | |
3436 | if (dev0) | |
3437 | ap->ops->dev_select(ap, 0); | |
d4b2bab4 | 3438 | |
9b89391c | 3439 | return ret; |
1da177e4 LT |
3440 | } |
3441 | ||
d4b2bab4 TH |
3442 | static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask, |
3443 | unsigned long deadline) | |
1da177e4 LT |
3444 | { |
3445 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
3446 | ||
44877b4e | 3447 | DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); |
1da177e4 LT |
3448 | |
3449 | /* software reset. causes dev0 to be selected */ | |
0d5ff566 TH |
3450 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
3451 | udelay(20); /* FIXME: flush */ | |
3452 | iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); | |
3453 | udelay(20); /* FIXME: flush */ | |
3454 | iowrite8(ap->ctl, ioaddr->ctl_addr); | |
1da177e4 | 3455 | |
88ff6eaf TH |
3456 | /* wait a while before checking status */ |
3457 | ata_wait_after_reset(ap, deadline); | |
1da177e4 | 3458 | |
2e9edbf8 | 3459 | /* Before we perform post reset processing we want to see if |
298a41ca TH |
3460 | * the bus shows 0xFF because the odd clown forgets the D7 |
3461 | * pulldown resistor. | |
3462 | */ | |
150981b0 | 3463 | if (ata_chk_status(ap) == 0xFF) |
9b89391c | 3464 | return -ENODEV; |
09c7ad79 | 3465 | |
d4b2bab4 | 3466 | return ata_bus_post_reset(ap, devmask, deadline); |
1da177e4 LT |
3467 | } |
3468 | ||
3469 | /** | |
3470 | * ata_bus_reset - reset host port and associated ATA channel | |
3471 | * @ap: port to reset | |
3472 | * | |
3473 | * This is typically the first time we actually start issuing | |
3474 | * commands to the ATA channel. We wait for BSY to clear, then | |
3475 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its | |
3476 | * result. Determine what devices, if any, are on the channel | |
3477 | * by looking at the device 0/1 error register. Look at the signature | |
3478 | * stored in each device's taskfile registers, to determine if | |
3479 | * the device is ATA or ATAPI. | |
3480 | * | |
3481 | * LOCKING: | |
0cba632b | 3482 | * PCI/etc. bus probe sem. |
cca3974e | 3483 | * Obtains host lock. |
1da177e4 LT |
3484 | * |
3485 | * SIDE EFFECTS: | |
198e0fed | 3486 | * Sets ATA_FLAG_DISABLED if bus reset fails. |
1da177e4 LT |
3487 | */ |
3488 | ||
3489 | void ata_bus_reset(struct ata_port *ap) | |
3490 | { | |
9af5c9c9 | 3491 | struct ata_device *device = ap->link.device; |
1da177e4 LT |
3492 | struct ata_ioports *ioaddr = &ap->ioaddr; |
3493 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
3494 | u8 err; | |
aec5c3c1 | 3495 | unsigned int dev0, dev1 = 0, devmask = 0; |
9b89391c | 3496 | int rc; |
1da177e4 | 3497 | |
44877b4e | 3498 | DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no); |
1da177e4 LT |
3499 | |
3500 | /* determine if device 0/1 are present */ | |
3501 | if (ap->flags & ATA_FLAG_SATA_RESET) | |
3502 | dev0 = 1; | |
3503 | else { | |
3504 | dev0 = ata_devchk(ap, 0); | |
3505 | if (slave_possible) | |
3506 | dev1 = ata_devchk(ap, 1); | |
3507 | } | |
3508 | ||
3509 | if (dev0) | |
3510 | devmask |= (1 << 0); | |
3511 | if (dev1) | |
3512 | devmask |= (1 << 1); | |
3513 | ||
3514 | /* select device 0 again */ | |
3515 | ap->ops->dev_select(ap, 0); | |
3516 | ||
3517 | /* issue bus reset */ | |
9b89391c TH |
3518 | if (ap->flags & ATA_FLAG_SRST) { |
3519 | rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ); | |
3520 | if (rc && rc != -ENODEV) | |
aec5c3c1 | 3521 | goto err_out; |
9b89391c | 3522 | } |
1da177e4 LT |
3523 | |
3524 | /* | |
3525 | * determine by signature whether we have ATA or ATAPI devices | |
3526 | */ | |
3f19859e | 3527 | device[0].class = ata_dev_try_classify(&device[0], dev0, &err); |
1da177e4 | 3528 | if ((slave_possible) && (err != 0x81)) |
3f19859e | 3529 | device[1].class = ata_dev_try_classify(&device[1], dev1, &err); |
1da177e4 | 3530 | |
1da177e4 | 3531 | /* is double-select really necessary? */ |
9af5c9c9 | 3532 | if (device[1].class != ATA_DEV_NONE) |
1da177e4 | 3533 | ap->ops->dev_select(ap, 1); |
9af5c9c9 | 3534 | if (device[0].class != ATA_DEV_NONE) |
1da177e4 LT |
3535 | ap->ops->dev_select(ap, 0); |
3536 | ||
3537 | /* if no devices were detected, disable this port */ | |
9af5c9c9 TH |
3538 | if ((device[0].class == ATA_DEV_NONE) && |
3539 | (device[1].class == ATA_DEV_NONE)) | |
1da177e4 LT |
3540 | goto err_out; |
3541 | ||
3542 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { | |
3543 | /* set up device control for ATA_FLAG_SATA_RESET */ | |
0d5ff566 | 3544 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
1da177e4 LT |
3545 | } |
3546 | ||
3547 | DPRINTK("EXIT\n"); | |
3548 | return; | |
3549 | ||
3550 | err_out: | |
f15a1daf | 3551 | ata_port_printk(ap, KERN_ERR, "disabling port\n"); |
ac8869d5 | 3552 | ata_port_disable(ap); |
1da177e4 LT |
3553 | |
3554 | DPRINTK("EXIT\n"); | |
3555 | } | |
3556 | ||
d7bb4cc7 | 3557 | /** |
936fd732 TH |
3558 | * sata_link_debounce - debounce SATA phy status |
3559 | * @link: ATA link to debounce SATA phy status for | |
d7bb4cc7 | 3560 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3561 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3562 | * |
936fd732 | 3563 | * Make sure SStatus of @link reaches stable state, determined by |
d7bb4cc7 TH |
3564 | * holding the same value where DET is not 1 for @duration polled |
3565 | * every @interval, before @timeout. Timeout constraints the | |
d4b2bab4 TH |
3566 | * beginning of the stable state. Because DET gets stuck at 1 on |
3567 | * some controllers after hot unplugging, this functions waits | |
d7bb4cc7 TH |
3568 | * until timeout then returns 0 if DET is stable at 1. |
3569 | * | |
d4b2bab4 TH |
3570 | * @timeout is further limited by @deadline. The sooner of the |
3571 | * two is used. | |
3572 | * | |
d7bb4cc7 TH |
3573 | * LOCKING: |
3574 | * Kernel thread context (may sleep) | |
3575 | * | |
3576 | * RETURNS: | |
3577 | * 0 on success, -errno on failure. | |
3578 | */ | |
936fd732 TH |
3579 | int sata_link_debounce(struct ata_link *link, const unsigned long *params, |
3580 | unsigned long deadline) | |
7a7921e8 | 3581 | { |
d7bb4cc7 | 3582 | unsigned long interval_msec = params[0]; |
d4b2bab4 TH |
3583 | unsigned long duration = msecs_to_jiffies(params[1]); |
3584 | unsigned long last_jiffies, t; | |
d7bb4cc7 TH |
3585 | u32 last, cur; |
3586 | int rc; | |
3587 | ||
d4b2bab4 TH |
3588 | t = jiffies + msecs_to_jiffies(params[2]); |
3589 | if (time_before(t, deadline)) | |
3590 | deadline = t; | |
3591 | ||
936fd732 | 3592 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3593 | return rc; |
3594 | cur &= 0xf; | |
3595 | ||
3596 | last = cur; | |
3597 | last_jiffies = jiffies; | |
3598 | ||
3599 | while (1) { | |
3600 | msleep(interval_msec); | |
936fd732 | 3601 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3602 | return rc; |
3603 | cur &= 0xf; | |
3604 | ||
3605 | /* DET stable? */ | |
3606 | if (cur == last) { | |
d4b2bab4 | 3607 | if (cur == 1 && time_before(jiffies, deadline)) |
d7bb4cc7 TH |
3608 | continue; |
3609 | if (time_after(jiffies, last_jiffies + duration)) | |
3610 | return 0; | |
3611 | continue; | |
3612 | } | |
3613 | ||
3614 | /* unstable, start over */ | |
3615 | last = cur; | |
3616 | last_jiffies = jiffies; | |
3617 | ||
f1545154 TH |
3618 | /* Check deadline. If debouncing failed, return |
3619 | * -EPIPE to tell upper layer to lower link speed. | |
3620 | */ | |
d4b2bab4 | 3621 | if (time_after(jiffies, deadline)) |
f1545154 | 3622 | return -EPIPE; |
d7bb4cc7 TH |
3623 | } |
3624 | } | |
3625 | ||
3626 | /** | |
936fd732 TH |
3627 | * sata_link_resume - resume SATA link |
3628 | * @link: ATA link to resume SATA | |
d7bb4cc7 | 3629 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3630 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3631 | * |
936fd732 | 3632 | * Resume SATA phy @link and debounce it. |
d7bb4cc7 TH |
3633 | * |
3634 | * LOCKING: | |
3635 | * Kernel thread context (may sleep) | |
3636 | * | |
3637 | * RETURNS: | |
3638 | * 0 on success, -errno on failure. | |
3639 | */ | |
936fd732 TH |
3640 | int sata_link_resume(struct ata_link *link, const unsigned long *params, |
3641 | unsigned long deadline) | |
d7bb4cc7 TH |
3642 | { |
3643 | u32 scontrol; | |
81952c54 TH |
3644 | int rc; |
3645 | ||
936fd732 | 3646 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 3647 | return rc; |
7a7921e8 | 3648 | |
852ee16a | 3649 | scontrol = (scontrol & 0x0f0) | 0x300; |
81952c54 | 3650 | |
936fd732 | 3651 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 | 3652 | return rc; |
7a7921e8 | 3653 | |
d7bb4cc7 TH |
3654 | /* Some PHYs react badly if SStatus is pounded immediately |
3655 | * after resuming. Delay 200ms before debouncing. | |
3656 | */ | |
3657 | msleep(200); | |
7a7921e8 | 3658 | |
936fd732 | 3659 | return sata_link_debounce(link, params, deadline); |
7a7921e8 TH |
3660 | } |
3661 | ||
f5914a46 TH |
3662 | /** |
3663 | * ata_std_prereset - prepare for reset | |
cc0680a5 | 3664 | * @link: ATA link to be reset |
d4b2bab4 | 3665 | * @deadline: deadline jiffies for the operation |
f5914a46 | 3666 | * |
cc0680a5 | 3667 | * @link is about to be reset. Initialize it. Failure from |
b8cffc6a TH |
3668 | * prereset makes libata abort whole reset sequence and give up |
3669 | * that port, so prereset should be best-effort. It does its | |
3670 | * best to prepare for reset sequence but if things go wrong, it | |
3671 | * should just whine, not fail. | |
f5914a46 TH |
3672 | * |
3673 | * LOCKING: | |
3674 | * Kernel thread context (may sleep) | |
3675 | * | |
3676 | * RETURNS: | |
3677 | * 0 on success, -errno otherwise. | |
3678 | */ | |
cc0680a5 | 3679 | int ata_std_prereset(struct ata_link *link, unsigned long deadline) |
f5914a46 | 3680 | { |
cc0680a5 | 3681 | struct ata_port *ap = link->ap; |
936fd732 | 3682 | struct ata_eh_context *ehc = &link->eh_context; |
e9c83914 | 3683 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
f5914a46 TH |
3684 | int rc; |
3685 | ||
31daabda | 3686 | /* handle link resume */ |
28324304 | 3687 | if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && |
0c88758b | 3688 | (link->flags & ATA_LFLAG_HRST_TO_RESUME)) |
28324304 TH |
3689 | ehc->i.action |= ATA_EH_HARDRESET; |
3690 | ||
633273a3 TH |
3691 | /* Some PMPs don't work with only SRST, force hardreset if PMP |
3692 | * is supported. | |
3693 | */ | |
3694 | if (ap->flags & ATA_FLAG_PMP) | |
3695 | ehc->i.action |= ATA_EH_HARDRESET; | |
3696 | ||
f5914a46 TH |
3697 | /* if we're about to do hardreset, nothing more to do */ |
3698 | if (ehc->i.action & ATA_EH_HARDRESET) | |
3699 | return 0; | |
3700 | ||
936fd732 | 3701 | /* if SATA, resume link */ |
a16abc0b | 3702 | if (ap->flags & ATA_FLAG_SATA) { |
936fd732 | 3703 | rc = sata_link_resume(link, timing, deadline); |
b8cffc6a TH |
3704 | /* whine about phy resume failure but proceed */ |
3705 | if (rc && rc != -EOPNOTSUPP) | |
cc0680a5 | 3706 | ata_link_printk(link, KERN_WARNING, "failed to resume " |
f5914a46 | 3707 | "link for reset (errno=%d)\n", rc); |
f5914a46 TH |
3708 | } |
3709 | ||
3710 | /* Wait for !BSY if the controller can wait for the first D2H | |
3711 | * Reg FIS and we don't know that no device is attached. | |
3712 | */ | |
0c88758b | 3713 | if (!(link->flags & ATA_LFLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) { |
b8cffc6a | 3714 | rc = ata_wait_ready(ap, deadline); |
6dffaf61 | 3715 | if (rc && rc != -ENODEV) { |
cc0680a5 | 3716 | ata_link_printk(link, KERN_WARNING, "device not ready " |
b8cffc6a TH |
3717 | "(errno=%d), forcing hardreset\n", rc); |
3718 | ehc->i.action |= ATA_EH_HARDRESET; | |
3719 | } | |
3720 | } | |
f5914a46 TH |
3721 | |
3722 | return 0; | |
3723 | } | |
3724 | ||
c2bd5804 TH |
3725 | /** |
3726 | * ata_std_softreset - reset host port via ATA SRST | |
cc0680a5 | 3727 | * @link: ATA link to reset |
c2bd5804 | 3728 | * @classes: resulting classes of attached devices |
d4b2bab4 | 3729 | * @deadline: deadline jiffies for the operation |
c2bd5804 | 3730 | * |
52783c5d | 3731 | * Reset host port using ATA SRST. |
c2bd5804 TH |
3732 | * |
3733 | * LOCKING: | |
3734 | * Kernel thread context (may sleep) | |
3735 | * | |
3736 | * RETURNS: | |
3737 | * 0 on success, -errno otherwise. | |
3738 | */ | |
cc0680a5 | 3739 | int ata_std_softreset(struct ata_link *link, unsigned int *classes, |
d4b2bab4 | 3740 | unsigned long deadline) |
c2bd5804 | 3741 | { |
cc0680a5 | 3742 | struct ata_port *ap = link->ap; |
c2bd5804 | 3743 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
d4b2bab4 TH |
3744 | unsigned int devmask = 0; |
3745 | int rc; | |
c2bd5804 TH |
3746 | u8 err; |
3747 | ||
3748 | DPRINTK("ENTER\n"); | |
3749 | ||
936fd732 | 3750 | if (ata_link_offline(link)) { |
3a39746a TH |
3751 | classes[0] = ATA_DEV_NONE; |
3752 | goto out; | |
3753 | } | |
3754 | ||
c2bd5804 TH |
3755 | /* determine if device 0/1 are present */ |
3756 | if (ata_devchk(ap, 0)) | |
3757 | devmask |= (1 << 0); | |
3758 | if (slave_possible && ata_devchk(ap, 1)) | |
3759 | devmask |= (1 << 1); | |
3760 | ||
c2bd5804 TH |
3761 | /* select device 0 again */ |
3762 | ap->ops->dev_select(ap, 0); | |
3763 | ||
3764 | /* issue bus reset */ | |
3765 | DPRINTK("about to softreset, devmask=%x\n", devmask); | |
d4b2bab4 | 3766 | rc = ata_bus_softreset(ap, devmask, deadline); |
9b89391c | 3767 | /* if link is occupied, -ENODEV too is an error */ |
936fd732 | 3768 | if (rc && (rc != -ENODEV || sata_scr_valid(link))) { |
cc0680a5 | 3769 | ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc); |
d4b2bab4 | 3770 | return rc; |
c2bd5804 TH |
3771 | } |
3772 | ||
3773 | /* determine by signature whether we have ATA or ATAPI devices */ | |
3f19859e TH |
3774 | classes[0] = ata_dev_try_classify(&link->device[0], |
3775 | devmask & (1 << 0), &err); | |
c2bd5804 | 3776 | if (slave_possible && err != 0x81) |
3f19859e TH |
3777 | classes[1] = ata_dev_try_classify(&link->device[1], |
3778 | devmask & (1 << 1), &err); | |
c2bd5804 | 3779 | |
3a39746a | 3780 | out: |
c2bd5804 TH |
3781 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
3782 | return 0; | |
3783 | } | |
3784 | ||
3785 | /** | |
cc0680a5 TH |
3786 | * sata_link_hardreset - reset link via SATA phy reset |
3787 | * @link: link to reset | |
b6103f6d | 3788 | * @timing: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3789 | * @deadline: deadline jiffies for the operation |
c2bd5804 | 3790 | * |
cc0680a5 | 3791 | * SATA phy-reset @link using DET bits of SControl register. |
c2bd5804 TH |
3792 | * |
3793 | * LOCKING: | |
3794 | * Kernel thread context (may sleep) | |
3795 | * | |
3796 | * RETURNS: | |
3797 | * 0 on success, -errno otherwise. | |
3798 | */ | |
cc0680a5 | 3799 | int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, |
d4b2bab4 | 3800 | unsigned long deadline) |
c2bd5804 | 3801 | { |
852ee16a | 3802 | u32 scontrol; |
81952c54 | 3803 | int rc; |
852ee16a | 3804 | |
c2bd5804 TH |
3805 | DPRINTK("ENTER\n"); |
3806 | ||
936fd732 | 3807 | if (sata_set_spd_needed(link)) { |
1c3fae4d TH |
3808 | /* SATA spec says nothing about how to reconfigure |
3809 | * spd. To be on the safe side, turn off phy during | |
3810 | * reconfiguration. This works for at least ICH7 AHCI | |
3811 | * and Sil3124. | |
3812 | */ | |
936fd732 | 3813 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 3814 | goto out; |
81952c54 | 3815 | |
a34b6fc0 | 3816 | scontrol = (scontrol & 0x0f0) | 0x304; |
81952c54 | 3817 | |
936fd732 | 3818 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
b6103f6d | 3819 | goto out; |
1c3fae4d | 3820 | |
936fd732 | 3821 | sata_set_spd(link); |
1c3fae4d TH |
3822 | } |
3823 | ||
3824 | /* issue phy wake/reset */ | |
936fd732 | 3825 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 3826 | goto out; |
81952c54 | 3827 | |
852ee16a | 3828 | scontrol = (scontrol & 0x0f0) | 0x301; |
81952c54 | 3829 | |
936fd732 | 3830 | if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) |
b6103f6d | 3831 | goto out; |
c2bd5804 | 3832 | |
1c3fae4d | 3833 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
c2bd5804 TH |
3834 | * 10.4.2 says at least 1 ms. |
3835 | */ | |
3836 | msleep(1); | |
3837 | ||
936fd732 TH |
3838 | /* bring link back */ |
3839 | rc = sata_link_resume(link, timing, deadline); | |
b6103f6d TH |
3840 | out: |
3841 | DPRINTK("EXIT, rc=%d\n", rc); | |
3842 | return rc; | |
3843 | } | |
3844 | ||
3845 | /** | |
3846 | * sata_std_hardreset - reset host port via SATA phy reset | |
cc0680a5 | 3847 | * @link: link to reset |
b6103f6d | 3848 | * @class: resulting class of attached device |
d4b2bab4 | 3849 | * @deadline: deadline jiffies for the operation |
b6103f6d TH |
3850 | * |
3851 | * SATA phy-reset host port using DET bits of SControl register, | |
3852 | * wait for !BSY and classify the attached device. | |
3853 | * | |
3854 | * LOCKING: | |
3855 | * Kernel thread context (may sleep) | |
3856 | * | |
3857 | * RETURNS: | |
3858 | * 0 on success, -errno otherwise. | |
3859 | */ | |
cc0680a5 | 3860 | int sata_std_hardreset(struct ata_link *link, unsigned int *class, |
d4b2bab4 | 3861 | unsigned long deadline) |
b6103f6d | 3862 | { |
cc0680a5 | 3863 | struct ata_port *ap = link->ap; |
936fd732 | 3864 | const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); |
b6103f6d TH |
3865 | int rc; |
3866 | ||
3867 | DPRINTK("ENTER\n"); | |
3868 | ||
3869 | /* do hardreset */ | |
cc0680a5 | 3870 | rc = sata_link_hardreset(link, timing, deadline); |
b6103f6d | 3871 | if (rc) { |
cc0680a5 | 3872 | ata_link_printk(link, KERN_ERR, |
b6103f6d TH |
3873 | "COMRESET failed (errno=%d)\n", rc); |
3874 | return rc; | |
3875 | } | |
c2bd5804 | 3876 | |
c2bd5804 | 3877 | /* TODO: phy layer with polling, timeouts, etc. */ |
936fd732 | 3878 | if (ata_link_offline(link)) { |
c2bd5804 TH |
3879 | *class = ATA_DEV_NONE; |
3880 | DPRINTK("EXIT, link offline\n"); | |
3881 | return 0; | |
3882 | } | |
3883 | ||
88ff6eaf TH |
3884 | /* wait a while before checking status */ |
3885 | ata_wait_after_reset(ap, deadline); | |
34fee227 | 3886 | |
633273a3 TH |
3887 | /* If PMP is supported, we have to do follow-up SRST. Note |
3888 | * that some PMPs don't send D2H Reg FIS after hardreset at | |
3889 | * all if the first port is empty. Wait for it just for a | |
3890 | * second and request follow-up SRST. | |
3891 | */ | |
3892 | if (ap->flags & ATA_FLAG_PMP) { | |
3893 | ata_wait_ready(ap, jiffies + HZ); | |
3894 | return -EAGAIN; | |
3895 | } | |
3896 | ||
d4b2bab4 | 3897 | rc = ata_wait_ready(ap, deadline); |
9b89391c TH |
3898 | /* link occupied, -ENODEV too is an error */ |
3899 | if (rc) { | |
cc0680a5 | 3900 | ata_link_printk(link, KERN_ERR, |
d4b2bab4 TH |
3901 | "COMRESET failed (errno=%d)\n", rc); |
3902 | return rc; | |
c2bd5804 TH |
3903 | } |
3904 | ||
3a39746a TH |
3905 | ap->ops->dev_select(ap, 0); /* probably unnecessary */ |
3906 | ||
3f19859e | 3907 | *class = ata_dev_try_classify(link->device, 1, NULL); |
c2bd5804 TH |
3908 | |
3909 | DPRINTK("EXIT, class=%u\n", *class); | |
3910 | return 0; | |
3911 | } | |
3912 | ||
3913 | /** | |
3914 | * ata_std_postreset - standard postreset callback | |
cc0680a5 | 3915 | * @link: the target ata_link |
c2bd5804 TH |
3916 | * @classes: classes of attached devices |
3917 | * | |
3918 | * This function is invoked after a successful reset. Note that | |
3919 | * the device might have been reset more than once using | |
3920 | * different reset methods before postreset is invoked. | |
c2bd5804 | 3921 | * |
c2bd5804 TH |
3922 | * LOCKING: |
3923 | * Kernel thread context (may sleep) | |
3924 | */ | |
cc0680a5 | 3925 | void ata_std_postreset(struct ata_link *link, unsigned int *classes) |
c2bd5804 | 3926 | { |
cc0680a5 | 3927 | struct ata_port *ap = link->ap; |
dc2b3515 TH |
3928 | u32 serror; |
3929 | ||
c2bd5804 TH |
3930 | DPRINTK("ENTER\n"); |
3931 | ||
c2bd5804 | 3932 | /* print link status */ |
936fd732 | 3933 | sata_print_link_status(link); |
c2bd5804 | 3934 | |
dc2b3515 | 3935 | /* clear SError */ |
936fd732 TH |
3936 | if (sata_scr_read(link, SCR_ERROR, &serror) == 0) |
3937 | sata_scr_write(link, SCR_ERROR, serror); | |
f7fe7ad4 | 3938 | link->eh_info.serror = 0; |
dc2b3515 | 3939 | |
c2bd5804 TH |
3940 | /* is double-select really necessary? */ |
3941 | if (classes[0] != ATA_DEV_NONE) | |
3942 | ap->ops->dev_select(ap, 1); | |
3943 | if (classes[1] != ATA_DEV_NONE) | |
3944 | ap->ops->dev_select(ap, 0); | |
3945 | ||
3a39746a TH |
3946 | /* bail out if no device is present */ |
3947 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { | |
3948 | DPRINTK("EXIT, no device\n"); | |
3949 | return; | |
3950 | } | |
3951 | ||
3952 | /* set up device control */ | |
0d5ff566 TH |
3953 | if (ap->ioaddr.ctl_addr) |
3954 | iowrite8(ap->ctl, ap->ioaddr.ctl_addr); | |
c2bd5804 TH |
3955 | |
3956 | DPRINTK("EXIT\n"); | |
3957 | } | |
3958 | ||
623a3128 TH |
3959 | /** |
3960 | * ata_dev_same_device - Determine whether new ID matches configured device | |
623a3128 TH |
3961 | * @dev: device to compare against |
3962 | * @new_class: class of the new device | |
3963 | * @new_id: IDENTIFY page of the new device | |
3964 | * | |
3965 | * Compare @new_class and @new_id against @dev and determine | |
3966 | * whether @dev is the device indicated by @new_class and | |
3967 | * @new_id. | |
3968 | * | |
3969 | * LOCKING: | |
3970 | * None. | |
3971 | * | |
3972 | * RETURNS: | |
3973 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
3974 | */ | |
3373efd8 TH |
3975 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
3976 | const u16 *new_id) | |
623a3128 TH |
3977 | { |
3978 | const u16 *old_id = dev->id; | |
a0cf733b TH |
3979 | unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
3980 | unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; | |
623a3128 TH |
3981 | |
3982 | if (dev->class != new_class) { | |
f15a1daf TH |
3983 | ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", |
3984 | dev->class, new_class); | |
623a3128 TH |
3985 | return 0; |
3986 | } | |
3987 | ||
a0cf733b TH |
3988 | ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
3989 | ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); | |
3990 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); | |
3991 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); | |
623a3128 TH |
3992 | |
3993 | if (strcmp(model[0], model[1])) { | |
f15a1daf TH |
3994 | ata_dev_printk(dev, KERN_INFO, "model number mismatch " |
3995 | "'%s' != '%s'\n", model[0], model[1]); | |
623a3128 TH |
3996 | return 0; |
3997 | } | |
3998 | ||
3999 | if (strcmp(serial[0], serial[1])) { | |
f15a1daf TH |
4000 | ata_dev_printk(dev, KERN_INFO, "serial number mismatch " |
4001 | "'%s' != '%s'\n", serial[0], serial[1]); | |
623a3128 TH |
4002 | return 0; |
4003 | } | |
4004 | ||
623a3128 TH |
4005 | return 1; |
4006 | } | |
4007 | ||
4008 | /** | |
fe30911b | 4009 | * ata_dev_reread_id - Re-read IDENTIFY data |
3fae450c | 4010 | * @dev: target ATA device |
bff04647 | 4011 | * @readid_flags: read ID flags |
623a3128 TH |
4012 | * |
4013 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
4014 | * the port. | |
4015 | * | |
4016 | * LOCKING: | |
4017 | * Kernel thread context (may sleep) | |
4018 | * | |
4019 | * RETURNS: | |
4020 | * 0 on success, negative errno otherwise | |
4021 | */ | |
fe30911b | 4022 | int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) |
623a3128 | 4023 | { |
5eb45c02 | 4024 | unsigned int class = dev->class; |
9af5c9c9 | 4025 | u16 *id = (void *)dev->link->ap->sector_buf; |
623a3128 TH |
4026 | int rc; |
4027 | ||
fe635c7e | 4028 | /* read ID data */ |
bff04647 | 4029 | rc = ata_dev_read_id(dev, &class, readid_flags, id); |
623a3128 | 4030 | if (rc) |
fe30911b | 4031 | return rc; |
623a3128 TH |
4032 | |
4033 | /* is the device still there? */ | |
fe30911b TH |
4034 | if (!ata_dev_same_device(dev, class, id)) |
4035 | return -ENODEV; | |
623a3128 | 4036 | |
fe635c7e | 4037 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
fe30911b TH |
4038 | return 0; |
4039 | } | |
4040 | ||
4041 | /** | |
4042 | * ata_dev_revalidate - Revalidate ATA device | |
4043 | * @dev: device to revalidate | |
422c9daa | 4044 | * @new_class: new class code |
fe30911b TH |
4045 | * @readid_flags: read ID flags |
4046 | * | |
4047 | * Re-read IDENTIFY page, make sure @dev is still attached to the | |
4048 | * port and reconfigure it according to the new IDENTIFY page. | |
4049 | * | |
4050 | * LOCKING: | |
4051 | * Kernel thread context (may sleep) | |
4052 | * | |
4053 | * RETURNS: | |
4054 | * 0 on success, negative errno otherwise | |
4055 | */ | |
422c9daa TH |
4056 | int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, |
4057 | unsigned int readid_flags) | |
fe30911b | 4058 | { |
6ddcd3b0 | 4059 | u64 n_sectors = dev->n_sectors; |
fe30911b TH |
4060 | int rc; |
4061 | ||
4062 | if (!ata_dev_enabled(dev)) | |
4063 | return -ENODEV; | |
4064 | ||
422c9daa TH |
4065 | /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ |
4066 | if (ata_class_enabled(new_class) && | |
4067 | new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) { | |
4068 | ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n", | |
4069 | dev->class, new_class); | |
4070 | rc = -ENODEV; | |
4071 | goto fail; | |
4072 | } | |
4073 | ||
fe30911b TH |
4074 | /* re-read ID */ |
4075 | rc = ata_dev_reread_id(dev, readid_flags); | |
4076 | if (rc) | |
4077 | goto fail; | |
623a3128 TH |
4078 | |
4079 | /* configure device according to the new ID */ | |
efdaedc4 | 4080 | rc = ata_dev_configure(dev); |
6ddcd3b0 TH |
4081 | if (rc) |
4082 | goto fail; | |
4083 | ||
4084 | /* verify n_sectors hasn't changed */ | |
b54eebd6 TH |
4085 | if (dev->class == ATA_DEV_ATA && n_sectors && |
4086 | dev->n_sectors != n_sectors) { | |
6ddcd3b0 TH |
4087 | ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " |
4088 | "%llu != %llu\n", | |
4089 | (unsigned long long)n_sectors, | |
4090 | (unsigned long long)dev->n_sectors); | |
8270bec4 TH |
4091 | |
4092 | /* restore original n_sectors */ | |
4093 | dev->n_sectors = n_sectors; | |
4094 | ||
6ddcd3b0 TH |
4095 | rc = -ENODEV; |
4096 | goto fail; | |
4097 | } | |
4098 | ||
4099 | return 0; | |
623a3128 TH |
4100 | |
4101 | fail: | |
f15a1daf | 4102 | ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); |
623a3128 TH |
4103 | return rc; |
4104 | } | |
4105 | ||
6919a0a6 AC |
4106 | struct ata_blacklist_entry { |
4107 | const char *model_num; | |
4108 | const char *model_rev; | |
4109 | unsigned long horkage; | |
4110 | }; | |
4111 | ||
4112 | static const struct ata_blacklist_entry ata_device_blacklist [] = { | |
4113 | /* Devices with DMA related problems under Linux */ | |
4114 | { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, | |
4115 | { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, | |
4116 | { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, | |
4117 | { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, | |
4118 | { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, | |
4119 | { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, | |
4120 | { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, | |
4121 | { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, | |
4122 | { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, | |
4123 | { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, | |
4124 | { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, | |
4125 | { "CRD-84", NULL, ATA_HORKAGE_NODMA }, | |
4126 | { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, | |
4127 | { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, | |
4128 | { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, | |
4129 | { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, | |
4130 | { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, | |
4131 | { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, | |
4132 | { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, | |
4133 | { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, | |
4134 | { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, | |
4135 | { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, | |
4136 | { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, | |
4137 | { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, | |
4138 | { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, | |
4139 | { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, | |
6919a0a6 AC |
4140 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
4141 | { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, | |
2dcb407e | 4142 | { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA }, |
39f19886 | 4143 | { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, |
3af9a77a TH |
4144 | /* Odd clown on sil3726/4726 PMPs */ |
4145 | { "Config Disk", NULL, ATA_HORKAGE_NODMA | | |
4146 | ATA_HORKAGE_SKIP_PM }, | |
6919a0a6 | 4147 | |
18d6e9d5 | 4148 | /* Weird ATAPI devices */ |
40a1d531 | 4149 | { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, |
18d6e9d5 | 4150 | |
6919a0a6 AC |
4151 | /* Devices we expect to fail diagnostics */ |
4152 | ||
4153 | /* Devices where NCQ should be avoided */ | |
4154 | /* NCQ is slow */ | |
2dcb407e | 4155 | { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, |
459ad688 | 4156 | { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, |
09125ea6 TH |
4157 | /* http://thread.gmane.org/gmane.linux.ide/14907 */ |
4158 | { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, | |
7acfaf30 | 4159 | /* NCQ is broken */ |
539cc7c7 | 4160 | { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, |
0e3dbc01 | 4161 | { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, |
0b0a43e0 DM |
4162 | { "HITACHI HDS7250SASUN500G*", NULL, ATA_HORKAGE_NONCQ }, |
4163 | { "HITACHI HDS7225SBSUN250G*", NULL, ATA_HORKAGE_NONCQ }, | |
da6f0ec2 | 4164 | { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, |
e41bd3e8 | 4165 | { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ }, |
539cc7c7 | 4166 | |
36e337d0 RH |
4167 | /* Blacklist entries taken from Silicon Image 3124/3132 |
4168 | Windows driver .inf file - also several Linux problem reports */ | |
4169 | { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, | |
4170 | { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, | |
4171 | { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, | |
6919a0a6 | 4172 | |
16c55b03 TH |
4173 | /* devices which puke on READ_NATIVE_MAX */ |
4174 | { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, | |
4175 | { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, | |
4176 | { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, | |
4177 | { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, | |
6919a0a6 | 4178 | |
93328e11 AC |
4179 | /* Devices which report 1 sector over size HPA */ |
4180 | { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
4181 | { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
4182 | ||
6bbfd53d AC |
4183 | /* Devices which get the IVB wrong */ |
4184 | { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, }, | |
4185 | { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, }, | |
e9f33406 PM |
4186 | { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, }, |
4187 | { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, }, | |
4188 | { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, }, | |
6bbfd53d | 4189 | |
6919a0a6 AC |
4190 | /* End Marker */ |
4191 | { } | |
1da177e4 | 4192 | }; |
2e9edbf8 | 4193 | |
741b7763 | 4194 | static int strn_pattern_cmp(const char *patt, const char *name, int wildchar) |
539cc7c7 JG |
4195 | { |
4196 | const char *p; | |
4197 | int len; | |
4198 | ||
4199 | /* | |
4200 | * check for trailing wildcard: *\0 | |
4201 | */ | |
4202 | p = strchr(patt, wildchar); | |
4203 | if (p && ((*(p + 1)) == 0)) | |
4204 | len = p - patt; | |
317b50b8 | 4205 | else { |
539cc7c7 | 4206 | len = strlen(name); |
317b50b8 AP |
4207 | if (!len) { |
4208 | if (!*patt) | |
4209 | return 0; | |
4210 | return -1; | |
4211 | } | |
4212 | } | |
539cc7c7 JG |
4213 | |
4214 | return strncmp(patt, name, len); | |
4215 | } | |
4216 | ||
75683fe7 | 4217 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev) |
1da177e4 | 4218 | { |
8bfa79fc TH |
4219 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
4220 | unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; | |
6919a0a6 | 4221 | const struct ata_blacklist_entry *ad = ata_device_blacklist; |
3a778275 | 4222 | |
8bfa79fc TH |
4223 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
4224 | ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); | |
1da177e4 | 4225 | |
6919a0a6 | 4226 | while (ad->model_num) { |
539cc7c7 | 4227 | if (!strn_pattern_cmp(ad->model_num, model_num, '*')) { |
6919a0a6 AC |
4228 | if (ad->model_rev == NULL) |
4229 | return ad->horkage; | |
539cc7c7 | 4230 | if (!strn_pattern_cmp(ad->model_rev, model_rev, '*')) |
6919a0a6 | 4231 | return ad->horkage; |
f4b15fef | 4232 | } |
6919a0a6 | 4233 | ad++; |
f4b15fef | 4234 | } |
1da177e4 LT |
4235 | return 0; |
4236 | } | |
4237 | ||
6919a0a6 AC |
4238 | static int ata_dma_blacklisted(const struct ata_device *dev) |
4239 | { | |
4240 | /* We don't support polling DMA. | |
4241 | * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) | |
4242 | * if the LLDD handles only interrupts in the HSM_ST_LAST state. | |
4243 | */ | |
9af5c9c9 | 4244 | if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && |
6919a0a6 AC |
4245 | (dev->flags & ATA_DFLAG_CDB_INTR)) |
4246 | return 1; | |
75683fe7 | 4247 | return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; |
6919a0a6 AC |
4248 | } |
4249 | ||
6bbfd53d AC |
4250 | /** |
4251 | * ata_is_40wire - check drive side detection | |
4252 | * @dev: device | |
4253 | * | |
4254 | * Perform drive side detection decoding, allowing for device vendors | |
4255 | * who can't follow the documentation. | |
4256 | */ | |
4257 | ||
4258 | static int ata_is_40wire(struct ata_device *dev) | |
4259 | { | |
4260 | if (dev->horkage & ATA_HORKAGE_IVB) | |
4261 | return ata_drive_40wire_relaxed(dev->id); | |
4262 | return ata_drive_40wire(dev->id); | |
4263 | } | |
4264 | ||
a6d5a51c TH |
4265 | /** |
4266 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
a6d5a51c TH |
4267 | * @dev: Device to compute xfermask for |
4268 | * | |
acf356b1 TH |
4269 | * Compute supported xfermask of @dev and store it in |
4270 | * dev->*_mask. This function is responsible for applying all | |
4271 | * known limits including host controller limits, device | |
4272 | * blacklist, etc... | |
a6d5a51c TH |
4273 | * |
4274 | * LOCKING: | |
4275 | * None. | |
a6d5a51c | 4276 | */ |
3373efd8 | 4277 | static void ata_dev_xfermask(struct ata_device *dev) |
1da177e4 | 4278 | { |
9af5c9c9 TH |
4279 | struct ata_link *link = dev->link; |
4280 | struct ata_port *ap = link->ap; | |
cca3974e | 4281 | struct ata_host *host = ap->host; |
a6d5a51c | 4282 | unsigned long xfer_mask; |
1da177e4 | 4283 | |
37deecb5 | 4284 | /* controller modes available */ |
565083e1 TH |
4285 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
4286 | ap->mwdma_mask, ap->udma_mask); | |
4287 | ||
8343f889 | 4288 | /* drive modes available */ |
37deecb5 TH |
4289 | xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
4290 | dev->mwdma_mask, dev->udma_mask); | |
4291 | xfer_mask &= ata_id_xfermask(dev->id); | |
565083e1 | 4292 | |
b352e57d AC |
4293 | /* |
4294 | * CFA Advanced TrueIDE timings are not allowed on a shared | |
4295 | * cable | |
4296 | */ | |
4297 | if (ata_dev_pair(dev)) { | |
4298 | /* No PIO5 or PIO6 */ | |
4299 | xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); | |
4300 | /* No MWDMA3 or MWDMA 4 */ | |
4301 | xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); | |
4302 | } | |
4303 | ||
37deecb5 TH |
4304 | if (ata_dma_blacklisted(dev)) { |
4305 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
f15a1daf TH |
4306 | ata_dev_printk(dev, KERN_WARNING, |
4307 | "device is on DMA blacklist, disabling DMA\n"); | |
37deecb5 | 4308 | } |
a6d5a51c | 4309 | |
14d66ab7 | 4310 | if ((host->flags & ATA_HOST_SIMPLEX) && |
2dcb407e | 4311 | host->simplex_claimed && host->simplex_claimed != ap) { |
37deecb5 TH |
4312 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
4313 | ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " | |
4314 | "other device, disabling DMA\n"); | |
5444a6f4 | 4315 | } |
565083e1 | 4316 | |
e424675f JG |
4317 | if (ap->flags & ATA_FLAG_NO_IORDY) |
4318 | xfer_mask &= ata_pio_mask_no_iordy(dev); | |
4319 | ||
5444a6f4 | 4320 | if (ap->ops->mode_filter) |
a76b62ca | 4321 | xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
5444a6f4 | 4322 | |
8343f889 RH |
4323 | /* Apply cable rule here. Don't apply it early because when |
4324 | * we handle hot plug the cable type can itself change. | |
4325 | * Check this last so that we know if the transfer rate was | |
4326 | * solely limited by the cable. | |
4327 | * Unknown or 80 wire cables reported host side are checked | |
4328 | * drive side as well. Cases where we know a 40wire cable | |
4329 | * is used safely for 80 are not checked here. | |
4330 | */ | |
4331 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) | |
4332 | /* UDMA/44 or higher would be available */ | |
2dcb407e | 4333 | if ((ap->cbl == ATA_CBL_PATA40) || |
6bbfd53d | 4334 | (ata_is_40wire(dev) && |
2dcb407e JG |
4335 | (ap->cbl == ATA_CBL_PATA_UNK || |
4336 | ap->cbl == ATA_CBL_PATA80))) { | |
4337 | ata_dev_printk(dev, KERN_WARNING, | |
8343f889 RH |
4338 | "limited to UDMA/33 due to 40-wire cable\n"); |
4339 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); | |
4340 | } | |
4341 | ||
565083e1 TH |
4342 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
4343 | &dev->mwdma_mask, &dev->udma_mask); | |
1da177e4 LT |
4344 | } |
4345 | ||
1da177e4 LT |
4346 | /** |
4347 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
1da177e4 LT |
4348 | * @dev: Device to which command will be sent |
4349 | * | |
780a87f7 JG |
4350 | * Issue SET FEATURES - XFER MODE command to device @dev |
4351 | * on port @ap. | |
4352 | * | |
1da177e4 | 4353 | * LOCKING: |
0cba632b | 4354 | * PCI/etc. bus probe sem. |
83206a29 TH |
4355 | * |
4356 | * RETURNS: | |
4357 | * 0 on success, AC_ERR_* mask otherwise. | |
1da177e4 LT |
4358 | */ |
4359 | ||
3373efd8 | 4360 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
1da177e4 | 4361 | { |
a0123703 | 4362 | struct ata_taskfile tf; |
83206a29 | 4363 | unsigned int err_mask; |
1da177e4 LT |
4364 | |
4365 | /* set up set-features taskfile */ | |
4366 | DPRINTK("set features - xfer mode\n"); | |
4367 | ||
464cf177 TH |
4368 | /* Some controllers and ATAPI devices show flaky interrupt |
4369 | * behavior after setting xfer mode. Use polling instead. | |
4370 | */ | |
3373efd8 | 4371 | ata_tf_init(dev, &tf); |
a0123703 TH |
4372 | tf.command = ATA_CMD_SET_FEATURES; |
4373 | tf.feature = SETFEATURES_XFER; | |
464cf177 | 4374 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; |
a0123703 TH |
4375 | tf.protocol = ATA_PROT_NODATA; |
4376 | tf.nsect = dev->xfer_mode; | |
1da177e4 | 4377 | |
2b789108 | 4378 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
9f45cbd3 KCA |
4379 | |
4380 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
4381 | return err_mask; | |
4382 | } | |
9f45cbd3 | 4383 | /** |
218f3d30 | 4384 | * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES |
9f45cbd3 KCA |
4385 | * @dev: Device to which command will be sent |
4386 | * @enable: Whether to enable or disable the feature | |
218f3d30 | 4387 | * @feature: The sector count represents the feature to set |
9f45cbd3 KCA |
4388 | * |
4389 | * Issue SET FEATURES - SATA FEATURES command to device @dev | |
218f3d30 | 4390 | * on port @ap with sector count |
9f45cbd3 KCA |
4391 | * |
4392 | * LOCKING: | |
4393 | * PCI/etc. bus probe sem. | |
4394 | * | |
4395 | * RETURNS: | |
4396 | * 0 on success, AC_ERR_* mask otherwise. | |
4397 | */ | |
218f3d30 JG |
4398 | static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, |
4399 | u8 feature) | |
9f45cbd3 KCA |
4400 | { |
4401 | struct ata_taskfile tf; | |
4402 | unsigned int err_mask; | |
4403 | ||
4404 | /* set up set-features taskfile */ | |
4405 | DPRINTK("set features - SATA features\n"); | |
4406 | ||
4407 | ata_tf_init(dev, &tf); | |
4408 | tf.command = ATA_CMD_SET_FEATURES; | |
4409 | tf.feature = enable; | |
4410 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4411 | tf.protocol = ATA_PROT_NODATA; | |
218f3d30 | 4412 | tf.nsect = feature; |
9f45cbd3 | 4413 | |
2b789108 | 4414 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
1da177e4 | 4415 | |
83206a29 TH |
4416 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4417 | return err_mask; | |
1da177e4 LT |
4418 | } |
4419 | ||
8bf62ece AL |
4420 | /** |
4421 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
8bf62ece | 4422 | * @dev: Device to which command will be sent |
e2a7f77a RD |
4423 | * @heads: Number of heads (taskfile parameter) |
4424 | * @sectors: Number of sectors (taskfile parameter) | |
8bf62ece AL |
4425 | * |
4426 | * LOCKING: | |
6aff8f1f TH |
4427 | * Kernel thread context (may sleep) |
4428 | * | |
4429 | * RETURNS: | |
4430 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece | 4431 | */ |
3373efd8 TH |
4432 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
4433 | u16 heads, u16 sectors) | |
8bf62ece | 4434 | { |
a0123703 | 4435 | struct ata_taskfile tf; |
6aff8f1f | 4436 | unsigned int err_mask; |
8bf62ece AL |
4437 | |
4438 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
4439 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
00b6f5e9 | 4440 | return AC_ERR_INVALID; |
8bf62ece AL |
4441 | |
4442 | /* set up init dev params taskfile */ | |
4443 | DPRINTK("init dev params \n"); | |
4444 | ||
3373efd8 | 4445 | ata_tf_init(dev, &tf); |
a0123703 TH |
4446 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
4447 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4448 | tf.protocol = ATA_PROT_NODATA; | |
4449 | tf.nsect = sectors; | |
4450 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 4451 | |
2b789108 | 4452 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
18b2466c AC |
4453 | /* A clean abort indicates an original or just out of spec drive |
4454 | and we should continue as we issue the setup based on the | |
4455 | drive reported working geometry */ | |
4456 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
4457 | err_mask = 0; | |
8bf62ece | 4458 | |
6aff8f1f TH |
4459 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4460 | return err_mask; | |
8bf62ece AL |
4461 | } |
4462 | ||
1da177e4 | 4463 | /** |
0cba632b JG |
4464 | * ata_sg_clean - Unmap DMA memory associated with command |
4465 | * @qc: Command containing DMA memory to be released | |
4466 | * | |
4467 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
4468 | * |
4469 | * LOCKING: | |
cca3974e | 4470 | * spin_lock_irqsave(host lock) |
1da177e4 | 4471 | */ |
70e6ad0c | 4472 | void ata_sg_clean(struct ata_queued_cmd *qc) |
1da177e4 LT |
4473 | { |
4474 | struct ata_port *ap = qc->ap; | |
cedc9a47 | 4475 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 4476 | int dir = qc->dma_dir; |
cedc9a47 | 4477 | void *pad_buf = NULL; |
1da177e4 | 4478 | |
a4631474 TH |
4479 | WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); |
4480 | WARN_ON(sg == NULL); | |
1da177e4 LT |
4481 | |
4482 | if (qc->flags & ATA_QCFLAG_SINGLE) | |
f131883e | 4483 | WARN_ON(qc->n_elem > 1); |
1da177e4 | 4484 | |
2c13b7ce | 4485 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 4486 | |
cedc9a47 JG |
4487 | /* if we padded the buffer out to 32-bit bound, and data |
4488 | * xfer direction is from-device, we must copy from the | |
4489 | * pad buffer back into the supplied buffer | |
4490 | */ | |
4491 | if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) | |
4492 | pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
4493 | ||
4494 | if (qc->flags & ATA_QCFLAG_SG) { | |
e1410f2d | 4495 | if (qc->n_elem) |
2f1f610b | 4496 | dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); |
cedc9a47 | 4497 | /* restore last sg */ |
87260216 | 4498 | sg_last(sg, qc->orig_n_elem)->length += qc->pad_len; |
cedc9a47 JG |
4499 | if (pad_buf) { |
4500 | struct scatterlist *psg = &qc->pad_sgent; | |
45711f1a | 4501 | void *addr = kmap_atomic(sg_page(psg), KM_IRQ0); |
cedc9a47 | 4502 | memcpy(addr + psg->offset, pad_buf, qc->pad_len); |
dfa15988 | 4503 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
4504 | } |
4505 | } else { | |
2e242fa9 | 4506 | if (qc->n_elem) |
2f1f610b | 4507 | dma_unmap_single(ap->dev, |
e1410f2d JG |
4508 | sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), |
4509 | dir); | |
cedc9a47 JG |
4510 | /* restore sg */ |
4511 | sg->length += qc->pad_len; | |
4512 | if (pad_buf) | |
4513 | memcpy(qc->buf_virt + sg->length - qc->pad_len, | |
4514 | pad_buf, qc->pad_len); | |
4515 | } | |
1da177e4 LT |
4516 | |
4517 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
cedc9a47 | 4518 | qc->__sg = NULL; |
1da177e4 LT |
4519 | } |
4520 | ||
4521 | /** | |
4522 | * ata_fill_sg - Fill PCI IDE PRD table | |
4523 | * @qc: Metadata associated with taskfile to be transferred | |
4524 | * | |
780a87f7 JG |
4525 | * Fill PCI IDE PRD (scatter-gather) table with segments |
4526 | * associated with the current disk command. | |
4527 | * | |
1da177e4 | 4528 | * LOCKING: |
cca3974e | 4529 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4530 | * |
4531 | */ | |
4532 | static void ata_fill_sg(struct ata_queued_cmd *qc) | |
4533 | { | |
1da177e4 | 4534 | struct ata_port *ap = qc->ap; |
cedc9a47 JG |
4535 | struct scatterlist *sg; |
4536 | unsigned int idx; | |
1da177e4 | 4537 | |
a4631474 | 4538 | WARN_ON(qc->__sg == NULL); |
f131883e | 4539 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); |
1da177e4 LT |
4540 | |
4541 | idx = 0; | |
cedc9a47 | 4542 | ata_for_each_sg(sg, qc) { |
1da177e4 LT |
4543 | u32 addr, offset; |
4544 | u32 sg_len, len; | |
4545 | ||
4546 | /* determine if physical DMA addr spans 64K boundary. | |
4547 | * Note h/w doesn't support 64-bit, so we unconditionally | |
4548 | * truncate dma_addr_t to u32. | |
4549 | */ | |
4550 | addr = (u32) sg_dma_address(sg); | |
4551 | sg_len = sg_dma_len(sg); | |
4552 | ||
4553 | while (sg_len) { | |
4554 | offset = addr & 0xffff; | |
4555 | len = sg_len; | |
4556 | if ((offset + sg_len) > 0x10000) | |
4557 | len = 0x10000 - offset; | |
4558 | ||
4559 | ap->prd[idx].addr = cpu_to_le32(addr); | |
4560 | ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); | |
4561 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); | |
4562 | ||
4563 | idx++; | |
4564 | sg_len -= len; | |
4565 | addr += len; | |
4566 | } | |
4567 | } | |
4568 | ||
4569 | if (idx) | |
4570 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
4571 | } | |
b9a4197e | 4572 | |
d26fc955 AC |
4573 | /** |
4574 | * ata_fill_sg_dumb - Fill PCI IDE PRD table | |
4575 | * @qc: Metadata associated with taskfile to be transferred | |
4576 | * | |
4577 | * Fill PCI IDE PRD (scatter-gather) table with segments | |
4578 | * associated with the current disk command. Perform the fill | |
4579 | * so that we avoid writing any length 64K records for | |
4580 | * controllers that don't follow the spec. | |
4581 | * | |
4582 | * LOCKING: | |
4583 | * spin_lock_irqsave(host lock) | |
4584 | * | |
4585 | */ | |
4586 | static void ata_fill_sg_dumb(struct ata_queued_cmd *qc) | |
4587 | { | |
4588 | struct ata_port *ap = qc->ap; | |
4589 | struct scatterlist *sg; | |
4590 | unsigned int idx; | |
4591 | ||
4592 | WARN_ON(qc->__sg == NULL); | |
4593 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); | |
4594 | ||
4595 | idx = 0; | |
4596 | ata_for_each_sg(sg, qc) { | |
4597 | u32 addr, offset; | |
4598 | u32 sg_len, len, blen; | |
4599 | ||
2dcb407e | 4600 | /* determine if physical DMA addr spans 64K boundary. |
d26fc955 AC |
4601 | * Note h/w doesn't support 64-bit, so we unconditionally |
4602 | * truncate dma_addr_t to u32. | |
4603 | */ | |
4604 | addr = (u32) sg_dma_address(sg); | |
4605 | sg_len = sg_dma_len(sg); | |
4606 | ||
4607 | while (sg_len) { | |
4608 | offset = addr & 0xffff; | |
4609 | len = sg_len; | |
4610 | if ((offset + sg_len) > 0x10000) | |
4611 | len = 0x10000 - offset; | |
4612 | ||
4613 | blen = len & 0xffff; | |
4614 | ap->prd[idx].addr = cpu_to_le32(addr); | |
4615 | if (blen == 0) { | |
4616 | /* Some PATA chipsets like the CS5530 can't | |
4617 | cope with 0x0000 meaning 64K as the spec says */ | |
4618 | ap->prd[idx].flags_len = cpu_to_le32(0x8000); | |
4619 | blen = 0x8000; | |
4620 | ap->prd[++idx].addr = cpu_to_le32(addr + 0x8000); | |
4621 | } | |
4622 | ap->prd[idx].flags_len = cpu_to_le32(blen); | |
4623 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); | |
4624 | ||
4625 | idx++; | |
4626 | sg_len -= len; | |
4627 | addr += len; | |
4628 | } | |
4629 | } | |
4630 | ||
4631 | if (idx) | |
4632 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
4633 | } | |
4634 | ||
1da177e4 LT |
4635 | /** |
4636 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported | |
4637 | * @qc: Metadata associated with taskfile to check | |
4638 | * | |
780a87f7 JG |
4639 | * Allow low-level driver to filter ATA PACKET commands, returning |
4640 | * a status indicating whether or not it is OK to use DMA for the | |
4641 | * supplied PACKET command. | |
4642 | * | |
1da177e4 | 4643 | * LOCKING: |
cca3974e | 4644 | * spin_lock_irqsave(host lock) |
0cba632b | 4645 | * |
1da177e4 LT |
4646 | * RETURNS: 0 when ATAPI DMA can be used |
4647 | * nonzero otherwise | |
4648 | */ | |
4649 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) | |
4650 | { | |
4651 | struct ata_port *ap = qc->ap; | |
b9a4197e TH |
4652 | |
4653 | /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a | |
4654 | * few ATAPI devices choke on such DMA requests. | |
4655 | */ | |
4656 | if (unlikely(qc->nbytes & 15)) | |
4657 | return 1; | |
6f23a31d | 4658 | |
1da177e4 | 4659 | if (ap->ops->check_atapi_dma) |
b9a4197e | 4660 | return ap->ops->check_atapi_dma(qc); |
1da177e4 | 4661 | |
b9a4197e | 4662 | return 0; |
1da177e4 | 4663 | } |
b9a4197e | 4664 | |
140b5e59 TH |
4665 | /** |
4666 | * atapi_qc_may_overflow - Check whether data transfer may overflow | |
4667 | * @qc: ATA command in question | |
4668 | * | |
4669 | * ATAPI commands which transfer variable length data to host | |
4670 | * might overflow due to application error or hardare bug. This | |
4671 | * function checks whether overflow should be drained and ignored | |
4672 | * for @qc. | |
4673 | * | |
4674 | * LOCKING: | |
4675 | * None. | |
4676 | * | |
4677 | * RETURNS: | |
4678 | * 1 if @qc may overflow; otherwise, 0. | |
4679 | */ | |
4680 | static int atapi_qc_may_overflow(struct ata_queued_cmd *qc) | |
4681 | { | |
4682 | if (qc->tf.protocol != ATA_PROT_ATAPI && | |
4683 | qc->tf.protocol != ATA_PROT_ATAPI_DMA) | |
4684 | return 0; | |
4685 | ||
4686 | if (qc->tf.flags & ATA_TFLAG_WRITE) | |
4687 | return 0; | |
4688 | ||
4689 | switch (qc->cdb[0]) { | |
4690 | case READ_10: | |
4691 | case READ_12: | |
4692 | case WRITE_10: | |
4693 | case WRITE_12: | |
4694 | case GPCMD_READ_CD: | |
4695 | case GPCMD_READ_CD_MSF: | |
4696 | return 0; | |
4697 | } | |
4698 | ||
4699 | return 1; | |
4700 | } | |
4701 | ||
31cc23b3 TH |
4702 | /** |
4703 | * ata_std_qc_defer - Check whether a qc needs to be deferred | |
4704 | * @qc: ATA command in question | |
4705 | * | |
4706 | * Non-NCQ commands cannot run with any other command, NCQ or | |
4707 | * not. As upper layer only knows the queue depth, we are | |
4708 | * responsible for maintaining exclusion. This function checks | |
4709 | * whether a new command @qc can be issued. | |
4710 | * | |
4711 | * LOCKING: | |
4712 | * spin_lock_irqsave(host lock) | |
4713 | * | |
4714 | * RETURNS: | |
4715 | * ATA_DEFER_* if deferring is needed, 0 otherwise. | |
4716 | */ | |
4717 | int ata_std_qc_defer(struct ata_queued_cmd *qc) | |
4718 | { | |
4719 | struct ata_link *link = qc->dev->link; | |
4720 | ||
4721 | if (qc->tf.protocol == ATA_PROT_NCQ) { | |
4722 | if (!ata_tag_valid(link->active_tag)) | |
4723 | return 0; | |
4724 | } else { | |
4725 | if (!ata_tag_valid(link->active_tag) && !link->sactive) | |
4726 | return 0; | |
4727 | } | |
4728 | ||
4729 | return ATA_DEFER_LINK; | |
4730 | } | |
4731 | ||
1da177e4 LT |
4732 | /** |
4733 | * ata_qc_prep - Prepare taskfile for submission | |
4734 | * @qc: Metadata associated with taskfile to be prepared | |
4735 | * | |
780a87f7 JG |
4736 | * Prepare ATA taskfile for submission. |
4737 | * | |
1da177e4 | 4738 | * LOCKING: |
cca3974e | 4739 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4740 | */ |
4741 | void ata_qc_prep(struct ata_queued_cmd *qc) | |
4742 | { | |
4743 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4744 | return; | |
4745 | ||
4746 | ata_fill_sg(qc); | |
4747 | } | |
4748 | ||
d26fc955 AC |
4749 | /** |
4750 | * ata_dumb_qc_prep - Prepare taskfile for submission | |
4751 | * @qc: Metadata associated with taskfile to be prepared | |
4752 | * | |
4753 | * Prepare ATA taskfile for submission. | |
4754 | * | |
4755 | * LOCKING: | |
4756 | * spin_lock_irqsave(host lock) | |
4757 | */ | |
4758 | void ata_dumb_qc_prep(struct ata_queued_cmd *qc) | |
4759 | { | |
4760 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4761 | return; | |
4762 | ||
4763 | ata_fill_sg_dumb(qc); | |
4764 | } | |
4765 | ||
e46834cd BK |
4766 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
4767 | ||
0cba632b JG |
4768 | /** |
4769 | * ata_sg_init_one - Associate command with memory buffer | |
4770 | * @qc: Command to be associated | |
4771 | * @buf: Memory buffer | |
4772 | * @buflen: Length of memory buffer, in bytes. | |
4773 | * | |
4774 | * Initialize the data-related elements of queued_cmd @qc | |
4775 | * to point to a single memory buffer, @buf of byte length @buflen. | |
4776 | * | |
4777 | * LOCKING: | |
cca3974e | 4778 | * spin_lock_irqsave(host lock) |
0cba632b JG |
4779 | */ |
4780 | ||
1da177e4 LT |
4781 | void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) |
4782 | { | |
1da177e4 LT |
4783 | qc->flags |= ATA_QCFLAG_SINGLE; |
4784 | ||
cedc9a47 | 4785 | qc->__sg = &qc->sgent; |
1da177e4 | 4786 | qc->n_elem = 1; |
cedc9a47 | 4787 | qc->orig_n_elem = 1; |
1da177e4 | 4788 | qc->buf_virt = buf; |
233277ca | 4789 | qc->nbytes = buflen; |
87260216 | 4790 | qc->cursg = qc->__sg; |
1da177e4 | 4791 | |
61c0596c | 4792 | sg_init_one(&qc->sgent, buf, buflen); |
1da177e4 LT |
4793 | } |
4794 | ||
0cba632b JG |
4795 | /** |
4796 | * ata_sg_init - Associate command with scatter-gather table. | |
4797 | * @qc: Command to be associated | |
4798 | * @sg: Scatter-gather table. | |
4799 | * @n_elem: Number of elements in s/g table. | |
4800 | * | |
4801 | * Initialize the data-related elements of queued_cmd @qc | |
4802 | * to point to a scatter-gather table @sg, containing @n_elem | |
4803 | * elements. | |
4804 | * | |
4805 | * LOCKING: | |
cca3974e | 4806 | * spin_lock_irqsave(host lock) |
0cba632b JG |
4807 | */ |
4808 | ||
1da177e4 LT |
4809 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
4810 | unsigned int n_elem) | |
4811 | { | |
4812 | qc->flags |= ATA_QCFLAG_SG; | |
cedc9a47 | 4813 | qc->__sg = sg; |
1da177e4 | 4814 | qc->n_elem = n_elem; |
cedc9a47 | 4815 | qc->orig_n_elem = n_elem; |
87260216 | 4816 | qc->cursg = qc->__sg; |
1da177e4 LT |
4817 | } |
4818 | ||
4819 | /** | |
0cba632b JG |
4820 | * ata_sg_setup_one - DMA-map the memory buffer associated with a command. |
4821 | * @qc: Command with memory buffer to be mapped. | |
4822 | * | |
4823 | * DMA-map the memory buffer associated with queued_cmd @qc. | |
1da177e4 LT |
4824 | * |
4825 | * LOCKING: | |
cca3974e | 4826 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4827 | * |
4828 | * RETURNS: | |
0cba632b | 4829 | * Zero on success, negative on error. |
1da177e4 LT |
4830 | */ |
4831 | ||
4832 | static int ata_sg_setup_one(struct ata_queued_cmd *qc) | |
4833 | { | |
4834 | struct ata_port *ap = qc->ap; | |
4835 | int dir = qc->dma_dir; | |
cedc9a47 | 4836 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 4837 | dma_addr_t dma_address; |
2e242fa9 | 4838 | int trim_sg = 0; |
1da177e4 | 4839 | |
cedc9a47 JG |
4840 | /* we must lengthen transfers to end on a 32-bit boundary */ |
4841 | qc->pad_len = sg->length & 3; | |
4842 | if (qc->pad_len) { | |
4843 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
4844 | struct scatterlist *psg = &qc->pad_sgent; | |
4845 | ||
a4631474 | 4846 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
4847 | |
4848 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
4849 | ||
4850 | if (qc->tf.flags & ATA_TFLAG_WRITE) | |
4851 | memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, | |
4852 | qc->pad_len); | |
4853 | ||
4854 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
4855 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
4856 | /* trim sg */ | |
4857 | sg->length -= qc->pad_len; | |
2e242fa9 TH |
4858 | if (sg->length == 0) |
4859 | trim_sg = 1; | |
cedc9a47 JG |
4860 | |
4861 | DPRINTK("padding done, sg->length=%u pad_len=%u\n", | |
4862 | sg->length, qc->pad_len); | |
4863 | } | |
4864 | ||
2e242fa9 TH |
4865 | if (trim_sg) { |
4866 | qc->n_elem--; | |
e1410f2d JG |
4867 | goto skip_map; |
4868 | } | |
4869 | ||
2f1f610b | 4870 | dma_address = dma_map_single(ap->dev, qc->buf_virt, |
32529e01 | 4871 | sg->length, dir); |
537a95d9 TH |
4872 | if (dma_mapping_error(dma_address)) { |
4873 | /* restore sg */ | |
4874 | sg->length += qc->pad_len; | |
1da177e4 | 4875 | return -1; |
537a95d9 | 4876 | } |
1da177e4 LT |
4877 | |
4878 | sg_dma_address(sg) = dma_address; | |
32529e01 | 4879 | sg_dma_len(sg) = sg->length; |
1da177e4 | 4880 | |
2e242fa9 | 4881 | skip_map: |
1da177e4 LT |
4882 | DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), |
4883 | qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
4884 | ||
4885 | return 0; | |
4886 | } | |
4887 | ||
4888 | /** | |
0cba632b JG |
4889 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
4890 | * @qc: Command with scatter-gather table to be mapped. | |
4891 | * | |
4892 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
1da177e4 LT |
4893 | * |
4894 | * LOCKING: | |
cca3974e | 4895 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4896 | * |
4897 | * RETURNS: | |
0cba632b | 4898 | * Zero on success, negative on error. |
1da177e4 LT |
4899 | * |
4900 | */ | |
4901 | ||
4902 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
4903 | { | |
4904 | struct ata_port *ap = qc->ap; | |
cedc9a47 | 4905 | struct scatterlist *sg = qc->__sg; |
87260216 | 4906 | struct scatterlist *lsg = sg_last(qc->__sg, qc->n_elem); |
e1410f2d | 4907 | int n_elem, pre_n_elem, dir, trim_sg = 0; |
1da177e4 | 4908 | |
44877b4e | 4909 | VPRINTK("ENTER, ata%u\n", ap->print_id); |
a4631474 | 4910 | WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); |
1da177e4 | 4911 | |
cedc9a47 JG |
4912 | /* we must lengthen transfers to end on a 32-bit boundary */ |
4913 | qc->pad_len = lsg->length & 3; | |
4914 | if (qc->pad_len) { | |
4915 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
4916 | struct scatterlist *psg = &qc->pad_sgent; | |
4917 | unsigned int offset; | |
4918 | ||
a4631474 | 4919 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
4920 | |
4921 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
4922 | ||
4923 | /* | |
4924 | * psg->page/offset are used to copy to-be-written | |
4925 | * data in this function or read data in ata_sg_clean. | |
4926 | */ | |
4927 | offset = lsg->offset + lsg->length - qc->pad_len; | |
acd054a5 | 4928 | sg_init_table(psg, 1); |
642f1490 JA |
4929 | sg_set_page(psg, nth_page(sg_page(lsg), offset >> PAGE_SHIFT), |
4930 | qc->pad_len, offset_in_page(offset)); | |
cedc9a47 JG |
4931 | |
4932 | if (qc->tf.flags & ATA_TFLAG_WRITE) { | |
45711f1a | 4933 | void *addr = kmap_atomic(sg_page(psg), KM_IRQ0); |
cedc9a47 | 4934 | memcpy(pad_buf, addr + psg->offset, qc->pad_len); |
dfa15988 | 4935 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
4936 | } |
4937 | ||
4938 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
4939 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
4940 | /* trim last sg */ | |
4941 | lsg->length -= qc->pad_len; | |
e1410f2d JG |
4942 | if (lsg->length == 0) |
4943 | trim_sg = 1; | |
cedc9a47 JG |
4944 | |
4945 | DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", | |
4946 | qc->n_elem - 1, lsg->length, qc->pad_len); | |
4947 | } | |
4948 | ||
e1410f2d JG |
4949 | pre_n_elem = qc->n_elem; |
4950 | if (trim_sg && pre_n_elem) | |
4951 | pre_n_elem--; | |
4952 | ||
4953 | if (!pre_n_elem) { | |
4954 | n_elem = 0; | |
4955 | goto skip_map; | |
4956 | } | |
4957 | ||
1da177e4 | 4958 | dir = qc->dma_dir; |
2f1f610b | 4959 | n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); |
537a95d9 TH |
4960 | if (n_elem < 1) { |
4961 | /* restore last sg */ | |
4962 | lsg->length += qc->pad_len; | |
1da177e4 | 4963 | return -1; |
537a95d9 | 4964 | } |
1da177e4 LT |
4965 | |
4966 | DPRINTK("%d sg elements mapped\n", n_elem); | |
4967 | ||
e1410f2d | 4968 | skip_map: |
1da177e4 LT |
4969 | qc->n_elem = n_elem; |
4970 | ||
4971 | return 0; | |
4972 | } | |
4973 | ||
0baab86b | 4974 | /** |
c893a3ae | 4975 | * swap_buf_le16 - swap halves of 16-bit words in place |
0baab86b EF |
4976 | * @buf: Buffer to swap |
4977 | * @buf_words: Number of 16-bit words in buffer. | |
4978 | * | |
4979 | * Swap halves of 16-bit words if needed to convert from | |
4980 | * little-endian byte order to native cpu byte order, or | |
4981 | * vice-versa. | |
4982 | * | |
4983 | * LOCKING: | |
6f0ef4fa | 4984 | * Inherited from caller. |
0baab86b | 4985 | */ |
1da177e4 LT |
4986 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
4987 | { | |
4988 | #ifdef __BIG_ENDIAN | |
4989 | unsigned int i; | |
4990 | ||
4991 | for (i = 0; i < buf_words; i++) | |
4992 | buf[i] = le16_to_cpu(buf[i]); | |
4993 | #endif /* __BIG_ENDIAN */ | |
4994 | } | |
4995 | ||
6ae4cfb5 | 4996 | /** |
0d5ff566 | 4997 | * ata_data_xfer - Transfer data by PIO |
a6b2c5d4 | 4998 | * @adev: device to target |
6ae4cfb5 AL |
4999 | * @buf: data buffer |
5000 | * @buflen: buffer length | |
344babaa | 5001 | * @write_data: read/write |
6ae4cfb5 AL |
5002 | * |
5003 | * Transfer data from/to the device data register by PIO. | |
5004 | * | |
5005 | * LOCKING: | |
5006 | * Inherited from caller. | |
6ae4cfb5 | 5007 | */ |
0d5ff566 TH |
5008 | void ata_data_xfer(struct ata_device *adev, unsigned char *buf, |
5009 | unsigned int buflen, int write_data) | |
1da177e4 | 5010 | { |
9af5c9c9 | 5011 | struct ata_port *ap = adev->link->ap; |
6ae4cfb5 | 5012 | unsigned int words = buflen >> 1; |
1da177e4 | 5013 | |
6ae4cfb5 | 5014 | /* Transfer multiple of 2 bytes */ |
1da177e4 | 5015 | if (write_data) |
0d5ff566 | 5016 | iowrite16_rep(ap->ioaddr.data_addr, buf, words); |
1da177e4 | 5017 | else |
0d5ff566 | 5018 | ioread16_rep(ap->ioaddr.data_addr, buf, words); |
6ae4cfb5 AL |
5019 | |
5020 | /* Transfer trailing 1 byte, if any. */ | |
5021 | if (unlikely(buflen & 0x01)) { | |
5022 | u16 align_buf[1] = { 0 }; | |
5023 | unsigned char *trailing_buf = buf + buflen - 1; | |
5024 | ||
5025 | if (write_data) { | |
5026 | memcpy(align_buf, trailing_buf, 1); | |
0d5ff566 | 5027 | iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); |
6ae4cfb5 | 5028 | } else { |
0d5ff566 | 5029 | align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr)); |
6ae4cfb5 AL |
5030 | memcpy(trailing_buf, align_buf, 1); |
5031 | } | |
5032 | } | |
1da177e4 LT |
5033 | } |
5034 | ||
75e99585 | 5035 | /** |
0d5ff566 | 5036 | * ata_data_xfer_noirq - Transfer data by PIO |
75e99585 AC |
5037 | * @adev: device to target |
5038 | * @buf: data buffer | |
5039 | * @buflen: buffer length | |
5040 | * @write_data: read/write | |
5041 | * | |
88574551 | 5042 | * Transfer data from/to the device data register by PIO. Do the |
75e99585 AC |
5043 | * transfer with interrupts disabled. |
5044 | * | |
5045 | * LOCKING: | |
5046 | * Inherited from caller. | |
5047 | */ | |
0d5ff566 TH |
5048 | void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, |
5049 | unsigned int buflen, int write_data) | |
75e99585 AC |
5050 | { |
5051 | unsigned long flags; | |
5052 | local_irq_save(flags); | |
0d5ff566 | 5053 | ata_data_xfer(adev, buf, buflen, write_data); |
75e99585 AC |
5054 | local_irq_restore(flags); |
5055 | } | |
5056 | ||
5057 | ||
6ae4cfb5 | 5058 | /** |
5a5dbd18 | 5059 | * ata_pio_sector - Transfer a sector of data. |
6ae4cfb5 AL |
5060 | * @qc: Command on going |
5061 | * | |
5a5dbd18 | 5062 | * Transfer qc->sect_size bytes of data from/to the ATA device. |
6ae4cfb5 AL |
5063 | * |
5064 | * LOCKING: | |
5065 | * Inherited from caller. | |
5066 | */ | |
5067 | ||
1da177e4 LT |
5068 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
5069 | { | |
5070 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
1da177e4 LT |
5071 | struct ata_port *ap = qc->ap; |
5072 | struct page *page; | |
5073 | unsigned int offset; | |
5074 | unsigned char *buf; | |
5075 | ||
5a5dbd18 | 5076 | if (qc->curbytes == qc->nbytes - qc->sect_size) |
14be71f4 | 5077 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 | 5078 | |
45711f1a | 5079 | page = sg_page(qc->cursg); |
87260216 | 5080 | offset = qc->cursg->offset + qc->cursg_ofs; |
1da177e4 LT |
5081 | |
5082 | /* get the current page and offset */ | |
5083 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
5084 | offset %= PAGE_SIZE; | |
5085 | ||
1da177e4 LT |
5086 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
5087 | ||
91b8b313 AL |
5088 | if (PageHighMem(page)) { |
5089 | unsigned long flags; | |
5090 | ||
a6b2c5d4 | 5091 | /* FIXME: use a bounce buffer */ |
91b8b313 AL |
5092 | local_irq_save(flags); |
5093 | buf = kmap_atomic(page, KM_IRQ0); | |
083958d3 | 5094 | |
91b8b313 | 5095 | /* do the actual data transfer */ |
5a5dbd18 | 5096 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); |
1da177e4 | 5097 | |
91b8b313 AL |
5098 | kunmap_atomic(buf, KM_IRQ0); |
5099 | local_irq_restore(flags); | |
5100 | } else { | |
5101 | buf = page_address(page); | |
5a5dbd18 | 5102 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); |
91b8b313 | 5103 | } |
1da177e4 | 5104 | |
5a5dbd18 ML |
5105 | qc->curbytes += qc->sect_size; |
5106 | qc->cursg_ofs += qc->sect_size; | |
1da177e4 | 5107 | |
87260216 JA |
5108 | if (qc->cursg_ofs == qc->cursg->length) { |
5109 | qc->cursg = sg_next(qc->cursg); | |
1da177e4 LT |
5110 | qc->cursg_ofs = 0; |
5111 | } | |
1da177e4 | 5112 | } |
1da177e4 | 5113 | |
07f6f7d0 | 5114 | /** |
5a5dbd18 | 5115 | * ata_pio_sectors - Transfer one or many sectors. |
07f6f7d0 AL |
5116 | * @qc: Command on going |
5117 | * | |
5a5dbd18 | 5118 | * Transfer one or many sectors of data from/to the |
07f6f7d0 AL |
5119 | * ATA device for the DRQ request. |
5120 | * | |
5121 | * LOCKING: | |
5122 | * Inherited from caller. | |
5123 | */ | |
1da177e4 | 5124 | |
07f6f7d0 AL |
5125 | static void ata_pio_sectors(struct ata_queued_cmd *qc) |
5126 | { | |
5127 | if (is_multi_taskfile(&qc->tf)) { | |
5128 | /* READ/WRITE MULTIPLE */ | |
5129 | unsigned int nsect; | |
5130 | ||
587005de | 5131 | WARN_ON(qc->dev->multi_count == 0); |
1da177e4 | 5132 | |
5a5dbd18 | 5133 | nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, |
726f0785 | 5134 | qc->dev->multi_count); |
07f6f7d0 AL |
5135 | while (nsect--) |
5136 | ata_pio_sector(qc); | |
5137 | } else | |
5138 | ata_pio_sector(qc); | |
4cc980b3 AL |
5139 | |
5140 | ata_altstatus(qc->ap); /* flush */ | |
07f6f7d0 AL |
5141 | } |
5142 | ||
c71c1857 AL |
5143 | /** |
5144 | * atapi_send_cdb - Write CDB bytes to hardware | |
5145 | * @ap: Port to which ATAPI device is attached. | |
5146 | * @qc: Taskfile currently active | |
5147 | * | |
5148 | * When device has indicated its readiness to accept | |
5149 | * a CDB, this function is called. Send the CDB. | |
5150 | * | |
5151 | * LOCKING: | |
5152 | * caller. | |
5153 | */ | |
5154 | ||
5155 | static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) | |
5156 | { | |
5157 | /* send SCSI cdb */ | |
5158 | DPRINTK("send cdb\n"); | |
db024d53 | 5159 | WARN_ON(qc->dev->cdb_len < 12); |
c71c1857 | 5160 | |
a6b2c5d4 | 5161 | ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); |
c71c1857 AL |
5162 | ata_altstatus(ap); /* flush */ |
5163 | ||
5164 | switch (qc->tf.protocol) { | |
5165 | case ATA_PROT_ATAPI: | |
5166 | ap->hsm_task_state = HSM_ST; | |
5167 | break; | |
5168 | case ATA_PROT_ATAPI_NODATA: | |
5169 | ap->hsm_task_state = HSM_ST_LAST; | |
5170 | break; | |
5171 | case ATA_PROT_ATAPI_DMA: | |
5172 | ap->hsm_task_state = HSM_ST_LAST; | |
5173 | /* initiate bmdma */ | |
5174 | ap->ops->bmdma_start(qc); | |
5175 | break; | |
5176 | } | |
1da177e4 LT |
5177 | } |
5178 | ||
6ae4cfb5 AL |
5179 | /** |
5180 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
5181 | * @qc: Command on going | |
5182 | * @bytes: number of bytes | |
5183 | * | |
5184 | * Transfer Transfer data from/to the ATAPI device. | |
5185 | * | |
5186 | * LOCKING: | |
5187 | * Inherited from caller. | |
5188 | * | |
5189 | */ | |
140b5e59 | 5190 | static int __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
1da177e4 LT |
5191 | { |
5192 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
1da177e4 | 5193 | struct ata_port *ap = qc->ap; |
140b5e59 TH |
5194 | struct ata_eh_info *ehi = &qc->dev->link->eh_info; |
5195 | struct scatterlist *sg; | |
1da177e4 LT |
5196 | struct page *page; |
5197 | unsigned char *buf; | |
5198 | unsigned int offset, count; | |
1da177e4 LT |
5199 | |
5200 | next_sg: | |
140b5e59 TH |
5201 | sg = qc->cursg; |
5202 | if (unlikely(!sg)) { | |
7fb6ec28 | 5203 | /* |
563a6e1f AL |
5204 | * The end of qc->sg is reached and the device expects |
5205 | * more data to transfer. In order not to overrun qc->sg | |
5206 | * and fulfill length specified in the byte count register, | |
5207 | * - for read case, discard trailing data from the device | |
5208 | * - for write case, padding zero data to the device | |
5209 | */ | |
5210 | u16 pad_buf[1] = { 0 }; | |
563a6e1f AL |
5211 | unsigned int i; |
5212 | ||
140b5e59 TH |
5213 | if (bytes > qc->curbytes - qc->nbytes + ATAPI_MAX_DRAIN) { |
5214 | ata_ehi_push_desc(ehi, "too much trailing data " | |
5215 | "buf=%u cur=%u bytes=%u", | |
5216 | qc->nbytes, qc->curbytes, bytes); | |
5217 | return -1; | |
5218 | } | |
5219 | ||
5220 | /* overflow is exptected for misc ATAPI commands */ | |
5221 | if (bytes && !atapi_qc_may_overflow(qc)) | |
5222 | ata_dev_printk(qc->dev, KERN_WARNING, "ATAPI %u bytes " | |
5223 | "trailing data (cdb=%02x nbytes=%u)\n", | |
5224 | bytes, qc->cdb[0], qc->nbytes); | |
563a6e1f | 5225 | |
140b5e59 | 5226 | for (i = 0; i < (bytes + 1) / 2; i++) |
2dcb407e | 5227 | ap->ops->data_xfer(qc->dev, (unsigned char *)pad_buf, 2, do_write); |
563a6e1f | 5228 | |
140b5e59 | 5229 | qc->curbytes += bytes; |
563a6e1f | 5230 | |
140b5e59 TH |
5231 | return 0; |
5232 | } | |
1da177e4 | 5233 | |
45711f1a | 5234 | page = sg_page(sg); |
1da177e4 LT |
5235 | offset = sg->offset + qc->cursg_ofs; |
5236 | ||
5237 | /* get the current page and offset */ | |
5238 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
5239 | offset %= PAGE_SIZE; | |
5240 | ||
6952df03 | 5241 | /* don't overrun current sg */ |
32529e01 | 5242 | count = min(sg->length - qc->cursg_ofs, bytes); |
1da177e4 LT |
5243 | |
5244 | /* don't cross page boundaries */ | |
5245 | count = min(count, (unsigned int)PAGE_SIZE - offset); | |
5246 | ||
7282aa4b AL |
5247 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
5248 | ||
91b8b313 AL |
5249 | if (PageHighMem(page)) { |
5250 | unsigned long flags; | |
5251 | ||
a6b2c5d4 | 5252 | /* FIXME: use bounce buffer */ |
91b8b313 AL |
5253 | local_irq_save(flags); |
5254 | buf = kmap_atomic(page, KM_IRQ0); | |
083958d3 | 5255 | |
91b8b313 | 5256 | /* do the actual data transfer */ |
a6b2c5d4 | 5257 | ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); |
7282aa4b | 5258 | |
91b8b313 AL |
5259 | kunmap_atomic(buf, KM_IRQ0); |
5260 | local_irq_restore(flags); | |
5261 | } else { | |
5262 | buf = page_address(page); | |
a6b2c5d4 | 5263 | ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); |
91b8b313 | 5264 | } |
1da177e4 LT |
5265 | |
5266 | bytes -= count; | |
140b5e59 TH |
5267 | if ((count & 1) && bytes) |
5268 | bytes--; | |
1da177e4 LT |
5269 | qc->curbytes += count; |
5270 | qc->cursg_ofs += count; | |
5271 | ||
32529e01 | 5272 | if (qc->cursg_ofs == sg->length) { |
87260216 | 5273 | qc->cursg = sg_next(qc->cursg); |
1da177e4 LT |
5274 | qc->cursg_ofs = 0; |
5275 | } | |
5276 | ||
563a6e1f | 5277 | if (bytes) |
1da177e4 | 5278 | goto next_sg; |
140b5e59 TH |
5279 | |
5280 | return 0; | |
1da177e4 LT |
5281 | } |
5282 | ||
6ae4cfb5 AL |
5283 | /** |
5284 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
5285 | * @qc: Command on going | |
5286 | * | |
5287 | * Transfer Transfer data from/to the ATAPI device. | |
5288 | * | |
5289 | * LOCKING: | |
5290 | * Inherited from caller. | |
6ae4cfb5 AL |
5291 | */ |
5292 | ||
1da177e4 LT |
5293 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
5294 | { | |
5295 | struct ata_port *ap = qc->ap; | |
5296 | struct ata_device *dev = qc->dev; | |
5297 | unsigned int ireason, bc_lo, bc_hi, bytes; | |
5298 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
5299 | ||
eec4c3f3 AL |
5300 | /* Abuse qc->result_tf for temp storage of intermediate TF |
5301 | * here to save some kernel stack usage. | |
5302 | * For normal completion, qc->result_tf is not relevant. For | |
5303 | * error, qc->result_tf is later overwritten by ata_qc_complete(). | |
5304 | * So, the correctness of qc->result_tf is not affected. | |
5305 | */ | |
5306 | ap->ops->tf_read(ap, &qc->result_tf); | |
5307 | ireason = qc->result_tf.nsect; | |
5308 | bc_lo = qc->result_tf.lbam; | |
5309 | bc_hi = qc->result_tf.lbah; | |
1da177e4 LT |
5310 | bytes = (bc_hi << 8) | bc_lo; |
5311 | ||
5312 | /* shall be cleared to zero, indicating xfer of data */ | |
5313 | if (ireason & (1 << 0)) | |
5314 | goto err_out; | |
5315 | ||
5316 | /* make sure transfer direction matches expected */ | |
5317 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; | |
5318 | if (do_write != i_write) | |
5319 | goto err_out; | |
5320 | ||
44877b4e | 5321 | VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); |
312f7da2 | 5322 | |
140b5e59 TH |
5323 | if (__atapi_pio_bytes(qc, bytes)) |
5324 | goto err_out; | |
4cc980b3 | 5325 | ata_altstatus(ap); /* flush */ |
1da177e4 LT |
5326 | |
5327 | return; | |
5328 | ||
5329 | err_out: | |
f15a1daf | 5330 | ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); |
11a56d24 | 5331 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 5332 | ap->hsm_task_state = HSM_ST_ERR; |
1da177e4 LT |
5333 | } |
5334 | ||
5335 | /** | |
c234fb00 AL |
5336 | * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. |
5337 | * @ap: the target ata_port | |
5338 | * @qc: qc on going | |
1da177e4 | 5339 | * |
c234fb00 AL |
5340 | * RETURNS: |
5341 | * 1 if ok in workqueue, 0 otherwise. | |
1da177e4 | 5342 | */ |
c234fb00 AL |
5343 | |
5344 | static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) | |
1da177e4 | 5345 | { |
c234fb00 AL |
5346 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
5347 | return 1; | |
1da177e4 | 5348 | |
c234fb00 AL |
5349 | if (ap->hsm_task_state == HSM_ST_FIRST) { |
5350 | if (qc->tf.protocol == ATA_PROT_PIO && | |
5351 | (qc->tf.flags & ATA_TFLAG_WRITE)) | |
5352 | return 1; | |
1da177e4 | 5353 | |
c234fb00 AL |
5354 | if (is_atapi_taskfile(&qc->tf) && |
5355 | !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
5356 | return 1; | |
fe79e683 AL |
5357 | } |
5358 | ||
c234fb00 AL |
5359 | return 0; |
5360 | } | |
1da177e4 | 5361 | |
c17ea20d TH |
5362 | /** |
5363 | * ata_hsm_qc_complete - finish a qc running on standard HSM | |
5364 | * @qc: Command to complete | |
5365 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
5366 | * | |
5367 | * Finish @qc which is running on standard HSM. | |
5368 | * | |
5369 | * LOCKING: | |
cca3974e | 5370 | * If @in_wq is zero, spin_lock_irqsave(host lock). |
c17ea20d TH |
5371 | * Otherwise, none on entry and grabs host lock. |
5372 | */ | |
5373 | static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) | |
5374 | { | |
5375 | struct ata_port *ap = qc->ap; | |
5376 | unsigned long flags; | |
5377 | ||
5378 | if (ap->ops->error_handler) { | |
5379 | if (in_wq) { | |
ba6a1308 | 5380 | spin_lock_irqsave(ap->lock, flags); |
c17ea20d | 5381 | |
cca3974e JG |
5382 | /* EH might have kicked in while host lock is |
5383 | * released. | |
c17ea20d TH |
5384 | */ |
5385 | qc = ata_qc_from_tag(ap, qc->tag); | |
5386 | if (qc) { | |
5387 | if (likely(!(qc->err_mask & AC_ERR_HSM))) { | |
83625006 | 5388 | ap->ops->irq_on(ap); |
c17ea20d TH |
5389 | ata_qc_complete(qc); |
5390 | } else | |
5391 | ata_port_freeze(ap); | |
5392 | } | |
5393 | ||
ba6a1308 | 5394 | spin_unlock_irqrestore(ap->lock, flags); |
c17ea20d TH |
5395 | } else { |
5396 | if (likely(!(qc->err_mask & AC_ERR_HSM))) | |
5397 | ata_qc_complete(qc); | |
5398 | else | |
5399 | ata_port_freeze(ap); | |
5400 | } | |
5401 | } else { | |
5402 | if (in_wq) { | |
ba6a1308 | 5403 | spin_lock_irqsave(ap->lock, flags); |
83625006 | 5404 | ap->ops->irq_on(ap); |
c17ea20d | 5405 | ata_qc_complete(qc); |
ba6a1308 | 5406 | spin_unlock_irqrestore(ap->lock, flags); |
c17ea20d TH |
5407 | } else |
5408 | ata_qc_complete(qc); | |
5409 | } | |
5410 | } | |
5411 | ||
bb5cb290 AL |
5412 | /** |
5413 | * ata_hsm_move - move the HSM to the next state. | |
5414 | * @ap: the target ata_port | |
5415 | * @qc: qc on going | |
5416 | * @status: current device status | |
5417 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
5418 | * | |
5419 | * RETURNS: | |
5420 | * 1 when poll next status needed, 0 otherwise. | |
5421 | */ | |
9a1004d0 TH |
5422 | int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, |
5423 | u8 status, int in_wq) | |
e2cec771 | 5424 | { |
bb5cb290 AL |
5425 | unsigned long flags = 0; |
5426 | int poll_next; | |
5427 | ||
6912ccd5 AL |
5428 | WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); |
5429 | ||
bb5cb290 AL |
5430 | /* Make sure ata_qc_issue_prot() does not throw things |
5431 | * like DMA polling into the workqueue. Notice that | |
5432 | * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). | |
5433 | */ | |
c234fb00 | 5434 | WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); |
bb5cb290 | 5435 | |
e2cec771 | 5436 | fsm_start: |
999bb6f4 | 5437 | DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", |
44877b4e | 5438 | ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); |
999bb6f4 | 5439 | |
e2cec771 AL |
5440 | switch (ap->hsm_task_state) { |
5441 | case HSM_ST_FIRST: | |
bb5cb290 AL |
5442 | /* Send first data block or PACKET CDB */ |
5443 | ||
5444 | /* If polling, we will stay in the work queue after | |
5445 | * sending the data. Otherwise, interrupt handler | |
5446 | * takes over after sending the data. | |
5447 | */ | |
5448 | poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); | |
5449 | ||
e2cec771 | 5450 | /* check device status */ |
3655d1d3 AL |
5451 | if (unlikely((status & ATA_DRQ) == 0)) { |
5452 | /* handle BSY=0, DRQ=0 as error */ | |
5453 | if (likely(status & (ATA_ERR | ATA_DF))) | |
5454 | /* device stops HSM for abort/error */ | |
5455 | qc->err_mask |= AC_ERR_DEV; | |
5456 | else | |
5457 | /* HSM violation. Let EH handle this */ | |
5458 | qc->err_mask |= AC_ERR_HSM; | |
5459 | ||
14be71f4 | 5460 | ap->hsm_task_state = HSM_ST_ERR; |
e2cec771 | 5461 | goto fsm_start; |
1da177e4 LT |
5462 | } |
5463 | ||
71601958 AL |
5464 | /* Device should not ask for data transfer (DRQ=1) |
5465 | * when it finds something wrong. | |
eee6c32f AL |
5466 | * We ignore DRQ here and stop the HSM by |
5467 | * changing hsm_task_state to HSM_ST_ERR and | |
5468 | * let the EH abort the command or reset the device. | |
71601958 AL |
5469 | */ |
5470 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
2d3b8eea AL |
5471 | /* Some ATAPI tape drives forget to clear the ERR bit |
5472 | * when doing the next command (mostly request sense). | |
5473 | * We ignore ERR here to workaround and proceed sending | |
5474 | * the CDB. | |
5475 | */ | |
5476 | if (!(qc->dev->horkage & ATA_HORKAGE_STUCK_ERR)) { | |
5477 | ata_port_printk(ap, KERN_WARNING, | |
5478 | "DRQ=1 with device error, " | |
5479 | "dev_stat 0x%X\n", status); | |
5480 | qc->err_mask |= AC_ERR_HSM; | |
5481 | ap->hsm_task_state = HSM_ST_ERR; | |
5482 | goto fsm_start; | |
5483 | } | |
71601958 | 5484 | } |
1da177e4 | 5485 | |
bb5cb290 AL |
5486 | /* Send the CDB (atapi) or the first data block (ata pio out). |
5487 | * During the state transition, interrupt handler shouldn't | |
5488 | * be invoked before the data transfer is complete and | |
5489 | * hsm_task_state is changed. Hence, the following locking. | |
5490 | */ | |
5491 | if (in_wq) | |
ba6a1308 | 5492 | spin_lock_irqsave(ap->lock, flags); |
1da177e4 | 5493 | |
bb5cb290 AL |
5494 | if (qc->tf.protocol == ATA_PROT_PIO) { |
5495 | /* PIO data out protocol. | |
5496 | * send first data block. | |
5497 | */ | |
0565c26d | 5498 | |
bb5cb290 AL |
5499 | /* ata_pio_sectors() might change the state |
5500 | * to HSM_ST_LAST. so, the state is changed here | |
5501 | * before ata_pio_sectors(). | |
5502 | */ | |
5503 | ap->hsm_task_state = HSM_ST; | |
5504 | ata_pio_sectors(qc); | |
bb5cb290 AL |
5505 | } else |
5506 | /* send CDB */ | |
5507 | atapi_send_cdb(ap, qc); | |
5508 | ||
5509 | if (in_wq) | |
ba6a1308 | 5510 | spin_unlock_irqrestore(ap->lock, flags); |
bb5cb290 AL |
5511 | |
5512 | /* if polling, ata_pio_task() handles the rest. | |
5513 | * otherwise, interrupt handler takes over from here. | |
5514 | */ | |
e2cec771 | 5515 | break; |
1c848984 | 5516 | |
e2cec771 AL |
5517 | case HSM_ST: |
5518 | /* complete command or read/write the data register */ | |
5519 | if (qc->tf.protocol == ATA_PROT_ATAPI) { | |
5520 | /* ATAPI PIO protocol */ | |
5521 | if ((status & ATA_DRQ) == 0) { | |
3655d1d3 AL |
5522 | /* No more data to transfer or device error. |
5523 | * Device error will be tagged in HSM_ST_LAST. | |
5524 | */ | |
e2cec771 AL |
5525 | ap->hsm_task_state = HSM_ST_LAST; |
5526 | goto fsm_start; | |
5527 | } | |
1da177e4 | 5528 | |
71601958 AL |
5529 | /* Device should not ask for data transfer (DRQ=1) |
5530 | * when it finds something wrong. | |
eee6c32f AL |
5531 | * We ignore DRQ here and stop the HSM by |
5532 | * changing hsm_task_state to HSM_ST_ERR and | |
5533 | * let the EH abort the command or reset the device. | |
71601958 AL |
5534 | */ |
5535 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
44877b4e TH |
5536 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " |
5537 | "device error, dev_stat 0x%X\n", | |
5538 | status); | |
3655d1d3 | 5539 | qc->err_mask |= AC_ERR_HSM; |
eee6c32f AL |
5540 | ap->hsm_task_state = HSM_ST_ERR; |
5541 | goto fsm_start; | |
71601958 | 5542 | } |
1da177e4 | 5543 | |
e2cec771 | 5544 | atapi_pio_bytes(qc); |
7fb6ec28 | 5545 | |
e2cec771 AL |
5546 | if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) |
5547 | /* bad ireason reported by device */ | |
5548 | goto fsm_start; | |
1da177e4 | 5549 | |
e2cec771 AL |
5550 | } else { |
5551 | /* ATA PIO protocol */ | |
5552 | if (unlikely((status & ATA_DRQ) == 0)) { | |
5553 | /* handle BSY=0, DRQ=0 as error */ | |
3655d1d3 AL |
5554 | if (likely(status & (ATA_ERR | ATA_DF))) |
5555 | /* device stops HSM for abort/error */ | |
5556 | qc->err_mask |= AC_ERR_DEV; | |
5557 | else | |
55a8e2c8 TH |
5558 | /* HSM violation. Let EH handle this. |
5559 | * Phantom devices also trigger this | |
5560 | * condition. Mark hint. | |
5561 | */ | |
5562 | qc->err_mask |= AC_ERR_HSM | | |
5563 | AC_ERR_NODEV_HINT; | |
3655d1d3 | 5564 | |
e2cec771 AL |
5565 | ap->hsm_task_state = HSM_ST_ERR; |
5566 | goto fsm_start; | |
5567 | } | |
1da177e4 | 5568 | |
eee6c32f AL |
5569 | /* For PIO reads, some devices may ask for |
5570 | * data transfer (DRQ=1) alone with ERR=1. | |
5571 | * We respect DRQ here and transfer one | |
5572 | * block of junk data before changing the | |
5573 | * hsm_task_state to HSM_ST_ERR. | |
5574 | * | |
5575 | * For PIO writes, ERR=1 DRQ=1 doesn't make | |
5576 | * sense since the data block has been | |
5577 | * transferred to the device. | |
71601958 AL |
5578 | */ |
5579 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
71601958 AL |
5580 | /* data might be corrputed */ |
5581 | qc->err_mask |= AC_ERR_DEV; | |
eee6c32f AL |
5582 | |
5583 | if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { | |
5584 | ata_pio_sectors(qc); | |
eee6c32f AL |
5585 | status = ata_wait_idle(ap); |
5586 | } | |
5587 | ||
3655d1d3 AL |
5588 | if (status & (ATA_BUSY | ATA_DRQ)) |
5589 | qc->err_mask |= AC_ERR_HSM; | |
5590 | ||
eee6c32f AL |
5591 | /* ata_pio_sectors() might change the |
5592 | * state to HSM_ST_LAST. so, the state | |
5593 | * is changed after ata_pio_sectors(). | |
5594 | */ | |
5595 | ap->hsm_task_state = HSM_ST_ERR; | |
5596 | goto fsm_start; | |
71601958 AL |
5597 | } |
5598 | ||
e2cec771 AL |
5599 | ata_pio_sectors(qc); |
5600 | ||
5601 | if (ap->hsm_task_state == HSM_ST_LAST && | |
5602 | (!(qc->tf.flags & ATA_TFLAG_WRITE))) { | |
5603 | /* all data read */ | |
52a32205 | 5604 | status = ata_wait_idle(ap); |
e2cec771 AL |
5605 | goto fsm_start; |
5606 | } | |
5607 | } | |
5608 | ||
bb5cb290 | 5609 | poll_next = 1; |
1da177e4 LT |
5610 | break; |
5611 | ||
14be71f4 | 5612 | case HSM_ST_LAST: |
6912ccd5 AL |
5613 | if (unlikely(!ata_ok(status))) { |
5614 | qc->err_mask |= __ac_err_mask(status); | |
e2cec771 AL |
5615 | ap->hsm_task_state = HSM_ST_ERR; |
5616 | goto fsm_start; | |
5617 | } | |
5618 | ||
5619 | /* no more data to transfer */ | |
4332a771 | 5620 | DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", |
44877b4e | 5621 | ap->print_id, qc->dev->devno, status); |
e2cec771 | 5622 | |
6912ccd5 AL |
5623 | WARN_ON(qc->err_mask); |
5624 | ||
e2cec771 | 5625 | ap->hsm_task_state = HSM_ST_IDLE; |
1da177e4 | 5626 | |
e2cec771 | 5627 | /* complete taskfile transaction */ |
c17ea20d | 5628 | ata_hsm_qc_complete(qc, in_wq); |
bb5cb290 AL |
5629 | |
5630 | poll_next = 0; | |
1da177e4 LT |
5631 | break; |
5632 | ||
14be71f4 | 5633 | case HSM_ST_ERR: |
e2cec771 AL |
5634 | /* make sure qc->err_mask is available to |
5635 | * know what's wrong and recover | |
5636 | */ | |
5637 | WARN_ON(qc->err_mask == 0); | |
5638 | ||
5639 | ap->hsm_task_state = HSM_ST_IDLE; | |
bb5cb290 | 5640 | |
999bb6f4 | 5641 | /* complete taskfile transaction */ |
c17ea20d | 5642 | ata_hsm_qc_complete(qc, in_wq); |
bb5cb290 AL |
5643 | |
5644 | poll_next = 0; | |
e2cec771 AL |
5645 | break; |
5646 | default: | |
bb5cb290 | 5647 | poll_next = 0; |
6912ccd5 | 5648 | BUG(); |
1da177e4 LT |
5649 | } |
5650 | ||
bb5cb290 | 5651 | return poll_next; |
1da177e4 LT |
5652 | } |
5653 | ||
65f27f38 | 5654 | static void ata_pio_task(struct work_struct *work) |
8061f5f0 | 5655 | { |
65f27f38 DH |
5656 | struct ata_port *ap = |
5657 | container_of(work, struct ata_port, port_task.work); | |
5658 | struct ata_queued_cmd *qc = ap->port_task_data; | |
8061f5f0 | 5659 | u8 status; |
a1af3734 | 5660 | int poll_next; |
8061f5f0 | 5661 | |
7fb6ec28 | 5662 | fsm_start: |
a1af3734 | 5663 | WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); |
8061f5f0 | 5664 | |
a1af3734 AL |
5665 | /* |
5666 | * This is purely heuristic. This is a fast path. | |
5667 | * Sometimes when we enter, BSY will be cleared in | |
5668 | * a chk-status or two. If not, the drive is probably seeking | |
5669 | * or something. Snooze for a couple msecs, then | |
5670 | * chk-status again. If still busy, queue delayed work. | |
5671 | */ | |
5672 | status = ata_busy_wait(ap, ATA_BUSY, 5); | |
5673 | if (status & ATA_BUSY) { | |
5674 | msleep(2); | |
5675 | status = ata_busy_wait(ap, ATA_BUSY, 10); | |
5676 | if (status & ATA_BUSY) { | |
31ce6dae | 5677 | ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); |
a1af3734 AL |
5678 | return; |
5679 | } | |
8061f5f0 TH |
5680 | } |
5681 | ||
a1af3734 AL |
5682 | /* move the HSM */ |
5683 | poll_next = ata_hsm_move(ap, qc, status, 1); | |
8061f5f0 | 5684 | |
a1af3734 AL |
5685 | /* another command or interrupt handler |
5686 | * may be running at this point. | |
5687 | */ | |
5688 | if (poll_next) | |
7fb6ec28 | 5689 | goto fsm_start; |
8061f5f0 TH |
5690 | } |
5691 | ||
1da177e4 LT |
5692 | /** |
5693 | * ata_qc_new - Request an available ATA command, for queueing | |
5694 | * @ap: Port associated with device @dev | |
5695 | * @dev: Device from whom we request an available command structure | |
5696 | * | |
5697 | * LOCKING: | |
0cba632b | 5698 | * None. |
1da177e4 LT |
5699 | */ |
5700 | ||
5701 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
5702 | { | |
5703 | struct ata_queued_cmd *qc = NULL; | |
5704 | unsigned int i; | |
5705 | ||
e3180499 | 5706 | /* no command while frozen */ |
b51e9e5d | 5707 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) |
e3180499 TH |
5708 | return NULL; |
5709 | ||
2ab7db1f TH |
5710 | /* the last tag is reserved for internal command. */ |
5711 | for (i = 0; i < ATA_MAX_QUEUE - 1; i++) | |
6cec4a39 | 5712 | if (!test_and_set_bit(i, &ap->qc_allocated)) { |
f69499f4 | 5713 | qc = __ata_qc_from_tag(ap, i); |
1da177e4 LT |
5714 | break; |
5715 | } | |
5716 | ||
5717 | if (qc) | |
5718 | qc->tag = i; | |
5719 | ||
5720 | return qc; | |
5721 | } | |
5722 | ||
5723 | /** | |
5724 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
1da177e4 LT |
5725 | * @dev: Device from whom we request an available command structure |
5726 | * | |
5727 | * LOCKING: | |
0cba632b | 5728 | * None. |
1da177e4 LT |
5729 | */ |
5730 | ||
3373efd8 | 5731 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) |
1da177e4 | 5732 | { |
9af5c9c9 | 5733 | struct ata_port *ap = dev->link->ap; |
1da177e4 LT |
5734 | struct ata_queued_cmd *qc; |
5735 | ||
5736 | qc = ata_qc_new(ap); | |
5737 | if (qc) { | |
1da177e4 LT |
5738 | qc->scsicmd = NULL; |
5739 | qc->ap = ap; | |
5740 | qc->dev = dev; | |
1da177e4 | 5741 | |
2c13b7ce | 5742 | ata_qc_reinit(qc); |
1da177e4 LT |
5743 | } |
5744 | ||
5745 | return qc; | |
5746 | } | |
5747 | ||
1da177e4 LT |
5748 | /** |
5749 | * ata_qc_free - free unused ata_queued_cmd | |
5750 | * @qc: Command to complete | |
5751 | * | |
5752 | * Designed to free unused ata_queued_cmd object | |
5753 | * in case something prevents using it. | |
5754 | * | |
5755 | * LOCKING: | |
cca3974e | 5756 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
5757 | */ |
5758 | void ata_qc_free(struct ata_queued_cmd *qc) | |
5759 | { | |
4ba946e9 TH |
5760 | struct ata_port *ap = qc->ap; |
5761 | unsigned int tag; | |
5762 | ||
a4631474 | 5763 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
1da177e4 | 5764 | |
4ba946e9 TH |
5765 | qc->flags = 0; |
5766 | tag = qc->tag; | |
5767 | if (likely(ata_tag_valid(tag))) { | |
4ba946e9 | 5768 | qc->tag = ATA_TAG_POISON; |
6cec4a39 | 5769 | clear_bit(tag, &ap->qc_allocated); |
4ba946e9 | 5770 | } |
1da177e4 LT |
5771 | } |
5772 | ||
76014427 | 5773 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 5774 | { |
dedaf2b0 | 5775 | struct ata_port *ap = qc->ap; |
9af5c9c9 | 5776 | struct ata_link *link = qc->dev->link; |
dedaf2b0 | 5777 | |
a4631474 TH |
5778 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
5779 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
1da177e4 LT |
5780 | |
5781 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
5782 | ata_sg_clean(qc); | |
5783 | ||
7401abf2 | 5784 | /* command should be marked inactive atomically with qc completion */ |
da917d69 | 5785 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
9af5c9c9 | 5786 | link->sactive &= ~(1 << qc->tag); |
da917d69 TH |
5787 | if (!link->sactive) |
5788 | ap->nr_active_links--; | |
5789 | } else { | |
9af5c9c9 | 5790 | link->active_tag = ATA_TAG_POISON; |
da917d69 TH |
5791 | ap->nr_active_links--; |
5792 | } | |
5793 | ||
5794 | /* clear exclusive status */ | |
5795 | if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && | |
5796 | ap->excl_link == link)) | |
5797 | ap->excl_link = NULL; | |
7401abf2 | 5798 | |
3f3791d3 AL |
5799 | /* atapi: mark qc as inactive to prevent the interrupt handler |
5800 | * from completing the command twice later, before the error handler | |
5801 | * is called. (when rc != 0 and atapi request sense is needed) | |
5802 | */ | |
5803 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
dedaf2b0 | 5804 | ap->qc_active &= ~(1 << qc->tag); |
3f3791d3 | 5805 | |
1da177e4 | 5806 | /* call completion callback */ |
77853bf2 | 5807 | qc->complete_fn(qc); |
1da177e4 LT |
5808 | } |
5809 | ||
39599a53 TH |
5810 | static void fill_result_tf(struct ata_queued_cmd *qc) |
5811 | { | |
5812 | struct ata_port *ap = qc->ap; | |
5813 | ||
39599a53 | 5814 | qc->result_tf.flags = qc->tf.flags; |
4742d54f | 5815 | ap->ops->tf_read(ap, &qc->result_tf); |
39599a53 TH |
5816 | } |
5817 | ||
f686bcb8 TH |
5818 | /** |
5819 | * ata_qc_complete - Complete an active ATA command | |
5820 | * @qc: Command to complete | |
5821 | * @err_mask: ATA Status register contents | |
5822 | * | |
5823 | * Indicate to the mid and upper layers that an ATA | |
5824 | * command has completed, with either an ok or not-ok status. | |
5825 | * | |
5826 | * LOCKING: | |
cca3974e | 5827 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
5828 | */ |
5829 | void ata_qc_complete(struct ata_queued_cmd *qc) | |
5830 | { | |
5831 | struct ata_port *ap = qc->ap; | |
5832 | ||
5833 | /* XXX: New EH and old EH use different mechanisms to | |
5834 | * synchronize EH with regular execution path. | |
5835 | * | |
5836 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. | |
5837 | * Normal execution path is responsible for not accessing a | |
5838 | * failed qc. libata core enforces the rule by returning NULL | |
5839 | * from ata_qc_from_tag() for failed qcs. | |
5840 | * | |
5841 | * Old EH depends on ata_qc_complete() nullifying completion | |
5842 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does | |
5843 | * not synchronize with interrupt handler. Only PIO task is | |
5844 | * taken care of. | |
5845 | */ | |
5846 | if (ap->ops->error_handler) { | |
4dbfa39b TH |
5847 | struct ata_device *dev = qc->dev; |
5848 | struct ata_eh_info *ehi = &dev->link->eh_info; | |
5849 | ||
b51e9e5d | 5850 | WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); |
f686bcb8 TH |
5851 | |
5852 | if (unlikely(qc->err_mask)) | |
5853 | qc->flags |= ATA_QCFLAG_FAILED; | |
5854 | ||
5855 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { | |
5856 | if (!ata_tag_internal(qc->tag)) { | |
5857 | /* always fill result TF for failed qc */ | |
39599a53 | 5858 | fill_result_tf(qc); |
f686bcb8 TH |
5859 | ata_qc_schedule_eh(qc); |
5860 | return; | |
5861 | } | |
5862 | } | |
5863 | ||
5864 | /* read result TF if requested */ | |
5865 | if (qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 5866 | fill_result_tf(qc); |
f686bcb8 | 5867 | |
4dbfa39b TH |
5868 | /* Some commands need post-processing after successful |
5869 | * completion. | |
5870 | */ | |
5871 | switch (qc->tf.command) { | |
5872 | case ATA_CMD_SET_FEATURES: | |
5873 | if (qc->tf.feature != SETFEATURES_WC_ON && | |
5874 | qc->tf.feature != SETFEATURES_WC_OFF) | |
5875 | break; | |
5876 | /* fall through */ | |
5877 | case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ | |
5878 | case ATA_CMD_SET_MULTI: /* multi_count changed */ | |
5879 | /* revalidate device */ | |
5880 | ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; | |
5881 | ata_port_schedule_eh(ap); | |
5882 | break; | |
054a5fba TH |
5883 | |
5884 | case ATA_CMD_SLEEP: | |
5885 | dev->flags |= ATA_DFLAG_SLEEPING; | |
5886 | break; | |
4dbfa39b TH |
5887 | } |
5888 | ||
f686bcb8 TH |
5889 | __ata_qc_complete(qc); |
5890 | } else { | |
5891 | if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) | |
5892 | return; | |
5893 | ||
5894 | /* read result TF if failed or requested */ | |
5895 | if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 5896 | fill_result_tf(qc); |
f686bcb8 TH |
5897 | |
5898 | __ata_qc_complete(qc); | |
5899 | } | |
5900 | } | |
5901 | ||
dedaf2b0 TH |
5902 | /** |
5903 | * ata_qc_complete_multiple - Complete multiple qcs successfully | |
5904 | * @ap: port in question | |
5905 | * @qc_active: new qc_active mask | |
5906 | * @finish_qc: LLDD callback invoked before completing a qc | |
5907 | * | |
5908 | * Complete in-flight commands. This functions is meant to be | |
5909 | * called from low-level driver's interrupt routine to complete | |
5910 | * requests normally. ap->qc_active and @qc_active is compared | |
5911 | * and commands are completed accordingly. | |
5912 | * | |
5913 | * LOCKING: | |
cca3974e | 5914 | * spin_lock_irqsave(host lock) |
dedaf2b0 TH |
5915 | * |
5916 | * RETURNS: | |
5917 | * Number of completed commands on success, -errno otherwise. | |
5918 | */ | |
5919 | int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, | |
5920 | void (*finish_qc)(struct ata_queued_cmd *)) | |
5921 | { | |
5922 | int nr_done = 0; | |
5923 | u32 done_mask; | |
5924 | int i; | |
5925 | ||
5926 | done_mask = ap->qc_active ^ qc_active; | |
5927 | ||
5928 | if (unlikely(done_mask & qc_active)) { | |
5929 | ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " | |
5930 | "(%08x->%08x)\n", ap->qc_active, qc_active); | |
5931 | return -EINVAL; | |
5932 | } | |
5933 | ||
5934 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
5935 | struct ata_queued_cmd *qc; | |
5936 | ||
5937 | if (!(done_mask & (1 << i))) | |
5938 | continue; | |
5939 | ||
5940 | if ((qc = ata_qc_from_tag(ap, i))) { | |
5941 | if (finish_qc) | |
5942 | finish_qc(qc); | |
5943 | ata_qc_complete(qc); | |
5944 | nr_done++; | |
5945 | } | |
5946 | } | |
5947 | ||
5948 | return nr_done; | |
5949 | } | |
5950 | ||
1da177e4 LT |
5951 | static inline int ata_should_dma_map(struct ata_queued_cmd *qc) |
5952 | { | |
5953 | struct ata_port *ap = qc->ap; | |
5954 | ||
5955 | switch (qc->tf.protocol) { | |
3dc1d881 | 5956 | case ATA_PROT_NCQ: |
1da177e4 LT |
5957 | case ATA_PROT_DMA: |
5958 | case ATA_PROT_ATAPI_DMA: | |
5959 | return 1; | |
5960 | ||
5961 | case ATA_PROT_ATAPI: | |
5962 | case ATA_PROT_PIO: | |
1da177e4 LT |
5963 | if (ap->flags & ATA_FLAG_PIO_DMA) |
5964 | return 1; | |
5965 | ||
5966 | /* fall through */ | |
5967 | ||
5968 | default: | |
5969 | return 0; | |
5970 | } | |
5971 | ||
5972 | /* never reached */ | |
5973 | } | |
5974 | ||
5975 | /** | |
5976 | * ata_qc_issue - issue taskfile to device | |
5977 | * @qc: command to issue to device | |
5978 | * | |
5979 | * Prepare an ATA command to submission to device. | |
5980 | * This includes mapping the data into a DMA-able | |
5981 | * area, filling in the S/G table, and finally | |
5982 | * writing the taskfile to hardware, starting the command. | |
5983 | * | |
5984 | * LOCKING: | |
cca3974e | 5985 | * spin_lock_irqsave(host lock) |
1da177e4 | 5986 | */ |
8e0e694a | 5987 | void ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
5988 | { |
5989 | struct ata_port *ap = qc->ap; | |
9af5c9c9 | 5990 | struct ata_link *link = qc->dev->link; |
1da177e4 | 5991 | |
dedaf2b0 TH |
5992 | /* Make sure only one non-NCQ command is outstanding. The |
5993 | * check is skipped for old EH because it reuses active qc to | |
5994 | * request ATAPI sense. | |
5995 | */ | |
9af5c9c9 | 5996 | WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag)); |
dedaf2b0 TH |
5997 | |
5998 | if (qc->tf.protocol == ATA_PROT_NCQ) { | |
9af5c9c9 | 5999 | WARN_ON(link->sactive & (1 << qc->tag)); |
da917d69 TH |
6000 | |
6001 | if (!link->sactive) | |
6002 | ap->nr_active_links++; | |
9af5c9c9 | 6003 | link->sactive |= 1 << qc->tag; |
dedaf2b0 | 6004 | } else { |
9af5c9c9 | 6005 | WARN_ON(link->sactive); |
da917d69 TH |
6006 | |
6007 | ap->nr_active_links++; | |
9af5c9c9 | 6008 | link->active_tag = qc->tag; |
dedaf2b0 TH |
6009 | } |
6010 | ||
e4a70e76 | 6011 | qc->flags |= ATA_QCFLAG_ACTIVE; |
dedaf2b0 | 6012 | ap->qc_active |= 1 << qc->tag; |
e4a70e76 | 6013 | |
1da177e4 LT |
6014 | if (ata_should_dma_map(qc)) { |
6015 | if (qc->flags & ATA_QCFLAG_SG) { | |
6016 | if (ata_sg_setup(qc)) | |
8e436af9 | 6017 | goto sg_err; |
1da177e4 LT |
6018 | } else if (qc->flags & ATA_QCFLAG_SINGLE) { |
6019 | if (ata_sg_setup_one(qc)) | |
8e436af9 | 6020 | goto sg_err; |
1da177e4 LT |
6021 | } |
6022 | } else { | |
6023 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
6024 | } | |
6025 | ||
054a5fba TH |
6026 | /* if device is sleeping, schedule softreset and abort the link */ |
6027 | if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { | |
6028 | link->eh_info.action |= ATA_EH_SOFTRESET; | |
6029 | ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); | |
6030 | ata_link_abort(link); | |
6031 | return; | |
6032 | } | |
6033 | ||
1da177e4 LT |
6034 | ap->ops->qc_prep(qc); |
6035 | ||
8e0e694a TH |
6036 | qc->err_mask |= ap->ops->qc_issue(qc); |
6037 | if (unlikely(qc->err_mask)) | |
6038 | goto err; | |
6039 | return; | |
1da177e4 | 6040 | |
8e436af9 TH |
6041 | sg_err: |
6042 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
8e0e694a TH |
6043 | qc->err_mask |= AC_ERR_SYSTEM; |
6044 | err: | |
6045 | ata_qc_complete(qc); | |
1da177e4 LT |
6046 | } |
6047 | ||
6048 | /** | |
6049 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner | |
6050 | * @qc: command to issue to device | |
6051 | * | |
6052 | * Using various libata functions and hooks, this function | |
6053 | * starts an ATA command. ATA commands are grouped into | |
6054 | * classes called "protocols", and issuing each type of protocol | |
6055 | * is slightly different. | |
6056 | * | |
0baab86b EF |
6057 | * May be used as the qc_issue() entry in ata_port_operations. |
6058 | * | |
1da177e4 | 6059 | * LOCKING: |
cca3974e | 6060 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
6061 | * |
6062 | * RETURNS: | |
9a3d9eb0 | 6063 | * Zero on success, AC_ERR_* mask on failure |
1da177e4 LT |
6064 | */ |
6065 | ||
9a3d9eb0 | 6066 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
1da177e4 LT |
6067 | { |
6068 | struct ata_port *ap = qc->ap; | |
6069 | ||
e50362ec AL |
6070 | /* Use polling pio if the LLD doesn't handle |
6071 | * interrupt driven pio and atapi CDB interrupt. | |
6072 | */ | |
6073 | if (ap->flags & ATA_FLAG_PIO_POLLING) { | |
6074 | switch (qc->tf.protocol) { | |
6075 | case ATA_PROT_PIO: | |
e3472cbe | 6076 | case ATA_PROT_NODATA: |
e50362ec AL |
6077 | case ATA_PROT_ATAPI: |
6078 | case ATA_PROT_ATAPI_NODATA: | |
6079 | qc->tf.flags |= ATA_TFLAG_POLLING; | |
6080 | break; | |
6081 | case ATA_PROT_ATAPI_DMA: | |
6082 | if (qc->dev->flags & ATA_DFLAG_CDB_INTR) | |
3a778275 | 6083 | /* see ata_dma_blacklisted() */ |
e50362ec AL |
6084 | BUG(); |
6085 | break; | |
6086 | default: | |
6087 | break; | |
6088 | } | |
6089 | } | |
6090 | ||
312f7da2 | 6091 | /* select the device */ |
1da177e4 LT |
6092 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
6093 | ||
312f7da2 | 6094 | /* start the command */ |
1da177e4 LT |
6095 | switch (qc->tf.protocol) { |
6096 | case ATA_PROT_NODATA: | |
312f7da2 AL |
6097 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
6098 | ata_qc_set_polling(qc); | |
6099 | ||
e5338254 | 6100 | ata_tf_to_host(ap, &qc->tf); |
312f7da2 AL |
6101 | ap->hsm_task_state = HSM_ST_LAST; |
6102 | ||
6103 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
31ce6dae | 6104 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
312f7da2 | 6105 | |
1da177e4 LT |
6106 | break; |
6107 | ||
6108 | case ATA_PROT_DMA: | |
587005de | 6109 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
312f7da2 | 6110 | |
1da177e4 LT |
6111 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
6112 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
6113 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
312f7da2 | 6114 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
6115 | break; |
6116 | ||
312f7da2 AL |
6117 | case ATA_PROT_PIO: |
6118 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
6119 | ata_qc_set_polling(qc); | |
1da177e4 | 6120 | |
e5338254 | 6121 | ata_tf_to_host(ap, &qc->tf); |
312f7da2 | 6122 | |
54f00389 AL |
6123 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
6124 | /* PIO data out protocol */ | |
6125 | ap->hsm_task_state = HSM_ST_FIRST; | |
31ce6dae | 6126 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
54f00389 AL |
6127 | |
6128 | /* always send first data block using | |
e27486db | 6129 | * the ata_pio_task() codepath. |
54f00389 | 6130 | */ |
312f7da2 | 6131 | } else { |
54f00389 AL |
6132 | /* PIO data in protocol */ |
6133 | ap->hsm_task_state = HSM_ST; | |
6134 | ||
6135 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
31ce6dae | 6136 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
54f00389 AL |
6137 | |
6138 | /* if polling, ata_pio_task() handles the rest. | |
6139 | * otherwise, interrupt handler takes over from here. | |
6140 | */ | |
312f7da2 AL |
6141 | } |
6142 | ||
1da177e4 LT |
6143 | break; |
6144 | ||
1da177e4 | 6145 | case ATA_PROT_ATAPI: |
1da177e4 | 6146 | case ATA_PROT_ATAPI_NODATA: |
312f7da2 AL |
6147 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
6148 | ata_qc_set_polling(qc); | |
6149 | ||
e5338254 | 6150 | ata_tf_to_host(ap, &qc->tf); |
f6ef65e6 | 6151 | |
312f7da2 AL |
6152 | ap->hsm_task_state = HSM_ST_FIRST; |
6153 | ||
6154 | /* send cdb by polling if no cdb interrupt */ | |
6155 | if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || | |
6156 | (qc->tf.flags & ATA_TFLAG_POLLING)) | |
31ce6dae | 6157 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
1da177e4 LT |
6158 | break; |
6159 | ||
6160 | case ATA_PROT_ATAPI_DMA: | |
587005de | 6161 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
312f7da2 | 6162 | |
1da177e4 LT |
6163 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
6164 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
312f7da2 AL |
6165 | ap->hsm_task_state = HSM_ST_FIRST; |
6166 | ||
6167 | /* send cdb by polling if no cdb interrupt */ | |
6168 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
31ce6dae | 6169 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
1da177e4 LT |
6170 | break; |
6171 | ||
6172 | default: | |
6173 | WARN_ON(1); | |
9a3d9eb0 | 6174 | return AC_ERR_SYSTEM; |
1da177e4 LT |
6175 | } |
6176 | ||
6177 | return 0; | |
6178 | } | |
6179 | ||
1da177e4 LT |
6180 | /** |
6181 | * ata_host_intr - Handle host interrupt for given (port, task) | |
6182 | * @ap: Port on which interrupt arrived (possibly...) | |
6183 | * @qc: Taskfile currently active in engine | |
6184 | * | |
6185 | * Handle host interrupt for given queued command. Currently, | |
6186 | * only DMA interrupts are handled. All other commands are | |
6187 | * handled via polling with interrupts disabled (nIEN bit). | |
6188 | * | |
6189 | * LOCKING: | |
cca3974e | 6190 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
6191 | * |
6192 | * RETURNS: | |
6193 | * One if interrupt was handled, zero if not (shared irq). | |
6194 | */ | |
6195 | ||
2dcb407e JG |
6196 | inline unsigned int ata_host_intr(struct ata_port *ap, |
6197 | struct ata_queued_cmd *qc) | |
1da177e4 | 6198 | { |
9af5c9c9 | 6199 | struct ata_eh_info *ehi = &ap->link.eh_info; |
312f7da2 | 6200 | u8 status, host_stat = 0; |
1da177e4 | 6201 | |
312f7da2 | 6202 | VPRINTK("ata%u: protocol %d task_state %d\n", |
44877b4e | 6203 | ap->print_id, qc->tf.protocol, ap->hsm_task_state); |
1da177e4 | 6204 | |
312f7da2 AL |
6205 | /* Check whether we are expecting interrupt in this state */ |
6206 | switch (ap->hsm_task_state) { | |
6207 | case HSM_ST_FIRST: | |
6912ccd5 AL |
6208 | /* Some pre-ATAPI-4 devices assert INTRQ |
6209 | * at this state when ready to receive CDB. | |
6210 | */ | |
1da177e4 | 6211 | |
312f7da2 AL |
6212 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. |
6213 | * The flag was turned on only for atapi devices. | |
6214 | * No need to check is_atapi_taskfile(&qc->tf) again. | |
6215 | */ | |
6216 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
1da177e4 | 6217 | goto idle_irq; |
1da177e4 | 6218 | break; |
312f7da2 AL |
6219 | case HSM_ST_LAST: |
6220 | if (qc->tf.protocol == ATA_PROT_DMA || | |
6221 | qc->tf.protocol == ATA_PROT_ATAPI_DMA) { | |
6222 | /* check status of DMA engine */ | |
6223 | host_stat = ap->ops->bmdma_status(ap); | |
44877b4e TH |
6224 | VPRINTK("ata%u: host_stat 0x%X\n", |
6225 | ap->print_id, host_stat); | |
312f7da2 AL |
6226 | |
6227 | /* if it's not our irq... */ | |
6228 | if (!(host_stat & ATA_DMA_INTR)) | |
6229 | goto idle_irq; | |
6230 | ||
6231 | /* before we do anything else, clear DMA-Start bit */ | |
6232 | ap->ops->bmdma_stop(qc); | |
a4f16610 AL |
6233 | |
6234 | if (unlikely(host_stat & ATA_DMA_ERR)) { | |
6235 | /* error when transfering data to/from memory */ | |
6236 | qc->err_mask |= AC_ERR_HOST_BUS; | |
6237 | ap->hsm_task_state = HSM_ST_ERR; | |
6238 | } | |
312f7da2 AL |
6239 | } |
6240 | break; | |
6241 | case HSM_ST: | |
6242 | break; | |
1da177e4 LT |
6243 | default: |
6244 | goto idle_irq; | |
6245 | } | |
6246 | ||
312f7da2 AL |
6247 | /* check altstatus */ |
6248 | status = ata_altstatus(ap); | |
6249 | if (status & ATA_BUSY) | |
6250 | goto idle_irq; | |
1da177e4 | 6251 | |
312f7da2 AL |
6252 | /* check main status, clearing INTRQ */ |
6253 | status = ata_chk_status(ap); | |
6254 | if (unlikely(status & ATA_BUSY)) | |
6255 | goto idle_irq; | |
1da177e4 | 6256 | |
312f7da2 AL |
6257 | /* ack bmdma irq events */ |
6258 | ap->ops->irq_clear(ap); | |
1da177e4 | 6259 | |
bb5cb290 | 6260 | ata_hsm_move(ap, qc, status, 0); |
ea54763f TH |
6261 | |
6262 | if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || | |
6263 | qc->tf.protocol == ATA_PROT_ATAPI_DMA)) | |
6264 | ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); | |
6265 | ||
1da177e4 LT |
6266 | return 1; /* irq handled */ |
6267 | ||
6268 | idle_irq: | |
6269 | ap->stats.idle_irq++; | |
6270 | ||
6271 | #ifdef ATA_IRQ_TRAP | |
6272 | if ((ap->stats.idle_irq % 1000) == 0) { | |
6d32d30f JG |
6273 | ata_chk_status(ap); |
6274 | ap->ops->irq_clear(ap); | |
f15a1daf | 6275 | ata_port_printk(ap, KERN_WARNING, "irq trap\n"); |
23cfce89 | 6276 | return 1; |
1da177e4 LT |
6277 | } |
6278 | #endif | |
6279 | return 0; /* irq not handled */ | |
6280 | } | |
6281 | ||
6282 | /** | |
6283 | * ata_interrupt - Default ATA host interrupt handler | |
0cba632b | 6284 | * @irq: irq line (unused) |
cca3974e | 6285 | * @dev_instance: pointer to our ata_host information structure |
1da177e4 | 6286 | * |
0cba632b JG |
6287 | * Default interrupt handler for PCI IDE devices. Calls |
6288 | * ata_host_intr() for each port that is not disabled. | |
6289 | * | |
1da177e4 | 6290 | * LOCKING: |
cca3974e | 6291 | * Obtains host lock during operation. |
1da177e4 LT |
6292 | * |
6293 | * RETURNS: | |
0cba632b | 6294 | * IRQ_NONE or IRQ_HANDLED. |
1da177e4 LT |
6295 | */ |
6296 | ||
2dcb407e | 6297 | irqreturn_t ata_interrupt(int irq, void *dev_instance) |
1da177e4 | 6298 | { |
cca3974e | 6299 | struct ata_host *host = dev_instance; |
1da177e4 LT |
6300 | unsigned int i; |
6301 | unsigned int handled = 0; | |
6302 | unsigned long flags; | |
6303 | ||
6304 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ | |
cca3974e | 6305 | spin_lock_irqsave(&host->lock, flags); |
1da177e4 | 6306 | |
cca3974e | 6307 | for (i = 0; i < host->n_ports; i++) { |
1da177e4 LT |
6308 | struct ata_port *ap; |
6309 | ||
cca3974e | 6310 | ap = host->ports[i]; |
c1389503 | 6311 | if (ap && |
029f5468 | 6312 | !(ap->flags & ATA_FLAG_DISABLED)) { |
1da177e4 LT |
6313 | struct ata_queued_cmd *qc; |
6314 | ||
9af5c9c9 | 6315 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
312f7da2 | 6316 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && |
21b1ed74 | 6317 | (qc->flags & ATA_QCFLAG_ACTIVE)) |
1da177e4 LT |
6318 | handled |= ata_host_intr(ap, qc); |
6319 | } | |
6320 | } | |
6321 | ||
cca3974e | 6322 | spin_unlock_irqrestore(&host->lock, flags); |
1da177e4 LT |
6323 | |
6324 | return IRQ_RETVAL(handled); | |
6325 | } | |
6326 | ||
34bf2170 TH |
6327 | /** |
6328 | * sata_scr_valid - test whether SCRs are accessible | |
936fd732 | 6329 | * @link: ATA link to test SCR accessibility for |
34bf2170 | 6330 | * |
936fd732 | 6331 | * Test whether SCRs are accessible for @link. |
34bf2170 TH |
6332 | * |
6333 | * LOCKING: | |
6334 | * None. | |
6335 | * | |
6336 | * RETURNS: | |
6337 | * 1 if SCRs are accessible, 0 otherwise. | |
6338 | */ | |
936fd732 | 6339 | int sata_scr_valid(struct ata_link *link) |
34bf2170 | 6340 | { |
936fd732 TH |
6341 | struct ata_port *ap = link->ap; |
6342 | ||
a16abc0b | 6343 | return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; |
34bf2170 TH |
6344 | } |
6345 | ||
6346 | /** | |
6347 | * sata_scr_read - read SCR register of the specified port | |
936fd732 | 6348 | * @link: ATA link to read SCR for |
34bf2170 TH |
6349 | * @reg: SCR to read |
6350 | * @val: Place to store read value | |
6351 | * | |
936fd732 | 6352 | * Read SCR register @reg of @link into *@val. This function is |
633273a3 TH |
6353 | * guaranteed to succeed if @link is ap->link, the cable type of |
6354 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
6355 | * |
6356 | * LOCKING: | |
633273a3 | 6357 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
6358 | * |
6359 | * RETURNS: | |
6360 | * 0 on success, negative errno on failure. | |
6361 | */ | |
936fd732 | 6362 | int sata_scr_read(struct ata_link *link, int reg, u32 *val) |
34bf2170 | 6363 | { |
633273a3 TH |
6364 | if (ata_is_host_link(link)) { |
6365 | struct ata_port *ap = link->ap; | |
936fd732 | 6366 | |
633273a3 TH |
6367 | if (sata_scr_valid(link)) |
6368 | return ap->ops->scr_read(ap, reg, val); | |
6369 | return -EOPNOTSUPP; | |
6370 | } | |
6371 | ||
6372 | return sata_pmp_scr_read(link, reg, val); | |
34bf2170 TH |
6373 | } |
6374 | ||
6375 | /** | |
6376 | * sata_scr_write - write SCR register of the specified port | |
936fd732 | 6377 | * @link: ATA link to write SCR for |
34bf2170 TH |
6378 | * @reg: SCR to write |
6379 | * @val: value to write | |
6380 | * | |
936fd732 | 6381 | * Write @val to SCR register @reg of @link. This function is |
633273a3 TH |
6382 | * guaranteed to succeed if @link is ap->link, the cable type of |
6383 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
6384 | * |
6385 | * LOCKING: | |
633273a3 | 6386 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
6387 | * |
6388 | * RETURNS: | |
6389 | * 0 on success, negative errno on failure. | |
6390 | */ | |
936fd732 | 6391 | int sata_scr_write(struct ata_link *link, int reg, u32 val) |
34bf2170 | 6392 | { |
633273a3 TH |
6393 | if (ata_is_host_link(link)) { |
6394 | struct ata_port *ap = link->ap; | |
6395 | ||
6396 | if (sata_scr_valid(link)) | |
6397 | return ap->ops->scr_write(ap, reg, val); | |
6398 | return -EOPNOTSUPP; | |
6399 | } | |
936fd732 | 6400 | |
633273a3 | 6401 | return sata_pmp_scr_write(link, reg, val); |
34bf2170 TH |
6402 | } |
6403 | ||
6404 | /** | |
6405 | * sata_scr_write_flush - write SCR register of the specified port and flush | |
936fd732 | 6406 | * @link: ATA link to write SCR for |
34bf2170 TH |
6407 | * @reg: SCR to write |
6408 | * @val: value to write | |
6409 | * | |
6410 | * This function is identical to sata_scr_write() except that this | |
6411 | * function performs flush after writing to the register. | |
6412 | * | |
6413 | * LOCKING: | |
633273a3 | 6414 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
6415 | * |
6416 | * RETURNS: | |
6417 | * 0 on success, negative errno on failure. | |
6418 | */ | |
936fd732 | 6419 | int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) |
34bf2170 | 6420 | { |
633273a3 TH |
6421 | if (ata_is_host_link(link)) { |
6422 | struct ata_port *ap = link->ap; | |
6423 | int rc; | |
da3dbb17 | 6424 | |
633273a3 TH |
6425 | if (sata_scr_valid(link)) { |
6426 | rc = ap->ops->scr_write(ap, reg, val); | |
6427 | if (rc == 0) | |
6428 | rc = ap->ops->scr_read(ap, reg, &val); | |
6429 | return rc; | |
6430 | } | |
6431 | return -EOPNOTSUPP; | |
34bf2170 | 6432 | } |
633273a3 TH |
6433 | |
6434 | return sata_pmp_scr_write(link, reg, val); | |
34bf2170 TH |
6435 | } |
6436 | ||
6437 | /** | |
936fd732 TH |
6438 | * ata_link_online - test whether the given link is online |
6439 | * @link: ATA link to test | |
34bf2170 | 6440 | * |
936fd732 TH |
6441 | * Test whether @link is online. Note that this function returns |
6442 | * 0 if online status of @link cannot be obtained, so | |
6443 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
6444 | * |
6445 | * LOCKING: | |
6446 | * None. | |
6447 | * | |
6448 | * RETURNS: | |
6449 | * 1 if the port online status is available and online. | |
6450 | */ | |
936fd732 | 6451 | int ata_link_online(struct ata_link *link) |
34bf2170 TH |
6452 | { |
6453 | u32 sstatus; | |
6454 | ||
936fd732 TH |
6455 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
6456 | (sstatus & 0xf) == 0x3) | |
34bf2170 TH |
6457 | return 1; |
6458 | return 0; | |
6459 | } | |
6460 | ||
6461 | /** | |
936fd732 TH |
6462 | * ata_link_offline - test whether the given link is offline |
6463 | * @link: ATA link to test | |
34bf2170 | 6464 | * |
936fd732 TH |
6465 | * Test whether @link is offline. Note that this function |
6466 | * returns 0 if offline status of @link cannot be obtained, so | |
6467 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
6468 | * |
6469 | * LOCKING: | |
6470 | * None. | |
6471 | * | |
6472 | * RETURNS: | |
6473 | * 1 if the port offline status is available and offline. | |
6474 | */ | |
936fd732 | 6475 | int ata_link_offline(struct ata_link *link) |
34bf2170 TH |
6476 | { |
6477 | u32 sstatus; | |
6478 | ||
936fd732 TH |
6479 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
6480 | (sstatus & 0xf) != 0x3) | |
34bf2170 TH |
6481 | return 1; |
6482 | return 0; | |
6483 | } | |
0baab86b | 6484 | |
77b08fb5 | 6485 | int ata_flush_cache(struct ata_device *dev) |
9b847548 | 6486 | { |
977e6b9f | 6487 | unsigned int err_mask; |
9b847548 JA |
6488 | u8 cmd; |
6489 | ||
6490 | if (!ata_try_flush_cache(dev)) | |
6491 | return 0; | |
6492 | ||
6fc49adb | 6493 | if (dev->flags & ATA_DFLAG_FLUSH_EXT) |
9b847548 JA |
6494 | cmd = ATA_CMD_FLUSH_EXT; |
6495 | else | |
6496 | cmd = ATA_CMD_FLUSH; | |
6497 | ||
4f34337b AC |
6498 | /* This is wrong. On a failed flush we get back the LBA of the lost |
6499 | sector and we should (assuming it wasn't aborted as unknown) issue | |
2dcb407e | 6500 | a further flush command to continue the writeback until it |
4f34337b | 6501 | does not error */ |
977e6b9f TH |
6502 | err_mask = ata_do_simple_cmd(dev, cmd); |
6503 | if (err_mask) { | |
6504 | ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); | |
6505 | return -EIO; | |
6506 | } | |
6507 | ||
6508 | return 0; | |
9b847548 JA |
6509 | } |
6510 | ||
6ffa01d8 | 6511 | #ifdef CONFIG_PM |
cca3974e JG |
6512 | static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, |
6513 | unsigned int action, unsigned int ehi_flags, | |
6514 | int wait) | |
500530f6 TH |
6515 | { |
6516 | unsigned long flags; | |
6517 | int i, rc; | |
6518 | ||
cca3974e JG |
6519 | for (i = 0; i < host->n_ports; i++) { |
6520 | struct ata_port *ap = host->ports[i]; | |
e3667ebf | 6521 | struct ata_link *link; |
500530f6 TH |
6522 | |
6523 | /* Previous resume operation might still be in | |
6524 | * progress. Wait for PM_PENDING to clear. | |
6525 | */ | |
6526 | if (ap->pflags & ATA_PFLAG_PM_PENDING) { | |
6527 | ata_port_wait_eh(ap); | |
6528 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
6529 | } | |
6530 | ||
6531 | /* request PM ops to EH */ | |
6532 | spin_lock_irqsave(ap->lock, flags); | |
6533 | ||
6534 | ap->pm_mesg = mesg; | |
6535 | if (wait) { | |
6536 | rc = 0; | |
6537 | ap->pm_result = &rc; | |
6538 | } | |
6539 | ||
6540 | ap->pflags |= ATA_PFLAG_PM_PENDING; | |
e3667ebf TH |
6541 | __ata_port_for_each_link(link, ap) { |
6542 | link->eh_info.action |= action; | |
6543 | link->eh_info.flags |= ehi_flags; | |
6544 | } | |
500530f6 TH |
6545 | |
6546 | ata_port_schedule_eh(ap); | |
6547 | ||
6548 | spin_unlock_irqrestore(ap->lock, flags); | |
6549 | ||
6550 | /* wait and check result */ | |
6551 | if (wait) { | |
6552 | ata_port_wait_eh(ap); | |
6553 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
6554 | if (rc) | |
6555 | return rc; | |
6556 | } | |
6557 | } | |
6558 | ||
6559 | return 0; | |
6560 | } | |
6561 | ||
6562 | /** | |
cca3974e JG |
6563 | * ata_host_suspend - suspend host |
6564 | * @host: host to suspend | |
500530f6 TH |
6565 | * @mesg: PM message |
6566 | * | |
cca3974e | 6567 | * Suspend @host. Actual operation is performed by EH. This |
500530f6 TH |
6568 | * function requests EH to perform PM operations and waits for EH |
6569 | * to finish. | |
6570 | * | |
6571 | * LOCKING: | |
6572 | * Kernel thread context (may sleep). | |
6573 | * | |
6574 | * RETURNS: | |
6575 | * 0 on success, -errno on failure. | |
6576 | */ | |
cca3974e | 6577 | int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
500530f6 | 6578 | { |
9666f400 | 6579 | int rc; |
500530f6 | 6580 | |
ca77329f KCA |
6581 | /* |
6582 | * disable link pm on all ports before requesting | |
6583 | * any pm activity | |
6584 | */ | |
6585 | ata_lpm_enable(host); | |
6586 | ||
cca3974e | 6587 | rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); |
9666f400 TH |
6588 | if (rc == 0) |
6589 | host->dev->power.power_state = mesg; | |
500530f6 TH |
6590 | return rc; |
6591 | } | |
6592 | ||
6593 | /** | |
cca3974e JG |
6594 | * ata_host_resume - resume host |
6595 | * @host: host to resume | |
500530f6 | 6596 | * |
cca3974e | 6597 | * Resume @host. Actual operation is performed by EH. This |
500530f6 TH |
6598 | * function requests EH to perform PM operations and returns. |
6599 | * Note that all resume operations are performed parallely. | |
6600 | * | |
6601 | * LOCKING: | |
6602 | * Kernel thread context (may sleep). | |
6603 | */ | |
cca3974e | 6604 | void ata_host_resume(struct ata_host *host) |
500530f6 | 6605 | { |
cca3974e JG |
6606 | ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, |
6607 | ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); | |
6608 | host->dev->power.power_state = PMSG_ON; | |
ca77329f KCA |
6609 | |
6610 | /* reenable link pm */ | |
6611 | ata_lpm_disable(host); | |
500530f6 | 6612 | } |
6ffa01d8 | 6613 | #endif |
500530f6 | 6614 | |
c893a3ae RD |
6615 | /** |
6616 | * ata_port_start - Set port up for dma. | |
6617 | * @ap: Port to initialize | |
6618 | * | |
6619 | * Called just after data structures for each port are | |
6620 | * initialized. Allocates space for PRD table. | |
6621 | * | |
6622 | * May be used as the port_start() entry in ata_port_operations. | |
6623 | * | |
6624 | * LOCKING: | |
6625 | * Inherited from caller. | |
6626 | */ | |
f0d36efd | 6627 | int ata_port_start(struct ata_port *ap) |
1da177e4 | 6628 | { |
2f1f610b | 6629 | struct device *dev = ap->dev; |
6037d6bb | 6630 | int rc; |
1da177e4 | 6631 | |
f0d36efd TH |
6632 | ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, |
6633 | GFP_KERNEL); | |
1da177e4 LT |
6634 | if (!ap->prd) |
6635 | return -ENOMEM; | |
6636 | ||
6037d6bb | 6637 | rc = ata_pad_alloc(ap, dev); |
f0d36efd | 6638 | if (rc) |
6037d6bb | 6639 | return rc; |
1da177e4 | 6640 | |
f0d36efd TH |
6641 | DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, |
6642 | (unsigned long long)ap->prd_dma); | |
1da177e4 LT |
6643 | return 0; |
6644 | } | |
6645 | ||
3ef3b43d TH |
6646 | /** |
6647 | * ata_dev_init - Initialize an ata_device structure | |
6648 | * @dev: Device structure to initialize | |
6649 | * | |
6650 | * Initialize @dev in preparation for probing. | |
6651 | * | |
6652 | * LOCKING: | |
6653 | * Inherited from caller. | |
6654 | */ | |
6655 | void ata_dev_init(struct ata_device *dev) | |
6656 | { | |
9af5c9c9 TH |
6657 | struct ata_link *link = dev->link; |
6658 | struct ata_port *ap = link->ap; | |
72fa4b74 TH |
6659 | unsigned long flags; |
6660 | ||
5a04bf4b | 6661 | /* SATA spd limit is bound to the first device */ |
9af5c9c9 TH |
6662 | link->sata_spd_limit = link->hw_sata_spd_limit; |
6663 | link->sata_spd = 0; | |
5a04bf4b | 6664 | |
72fa4b74 TH |
6665 | /* High bits of dev->flags are used to record warm plug |
6666 | * requests which occur asynchronously. Synchronize using | |
cca3974e | 6667 | * host lock. |
72fa4b74 | 6668 | */ |
ba6a1308 | 6669 | spin_lock_irqsave(ap->lock, flags); |
72fa4b74 | 6670 | dev->flags &= ~ATA_DFLAG_INIT_MASK; |
3dcc323f | 6671 | dev->horkage = 0; |
ba6a1308 | 6672 | spin_unlock_irqrestore(ap->lock, flags); |
3ef3b43d | 6673 | |
72fa4b74 TH |
6674 | memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, |
6675 | sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); | |
3ef3b43d TH |
6676 | dev->pio_mask = UINT_MAX; |
6677 | dev->mwdma_mask = UINT_MAX; | |
6678 | dev->udma_mask = UINT_MAX; | |
6679 | } | |
6680 | ||
4fb37a25 TH |
6681 | /** |
6682 | * ata_link_init - Initialize an ata_link structure | |
6683 | * @ap: ATA port link is attached to | |
6684 | * @link: Link structure to initialize | |
8989805d | 6685 | * @pmp: Port multiplier port number |
4fb37a25 TH |
6686 | * |
6687 | * Initialize @link. | |
6688 | * | |
6689 | * LOCKING: | |
6690 | * Kernel thread context (may sleep) | |
6691 | */ | |
fb7fd614 | 6692 | void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) |
4fb37a25 TH |
6693 | { |
6694 | int i; | |
6695 | ||
6696 | /* clear everything except for devices */ | |
6697 | memset(link, 0, offsetof(struct ata_link, device[0])); | |
6698 | ||
6699 | link->ap = ap; | |
8989805d | 6700 | link->pmp = pmp; |
4fb37a25 TH |
6701 | link->active_tag = ATA_TAG_POISON; |
6702 | link->hw_sata_spd_limit = UINT_MAX; | |
6703 | ||
6704 | /* can't use iterator, ap isn't initialized yet */ | |
6705 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
6706 | struct ata_device *dev = &link->device[i]; | |
6707 | ||
6708 | dev->link = link; | |
6709 | dev->devno = dev - link->device; | |
6710 | ata_dev_init(dev); | |
6711 | } | |
6712 | } | |
6713 | ||
6714 | /** | |
6715 | * sata_link_init_spd - Initialize link->sata_spd_limit | |
6716 | * @link: Link to configure sata_spd_limit for | |
6717 | * | |
6718 | * Initialize @link->[hw_]sata_spd_limit to the currently | |
6719 | * configured value. | |
6720 | * | |
6721 | * LOCKING: | |
6722 | * Kernel thread context (may sleep). | |
6723 | * | |
6724 | * RETURNS: | |
6725 | * 0 on success, -errno on failure. | |
6726 | */ | |
fb7fd614 | 6727 | int sata_link_init_spd(struct ata_link *link) |
4fb37a25 TH |
6728 | { |
6729 | u32 scontrol, spd; | |
6730 | int rc; | |
6731 | ||
6732 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); | |
6733 | if (rc) | |
6734 | return rc; | |
6735 | ||
6736 | spd = (scontrol >> 4) & 0xf; | |
6737 | if (spd) | |
6738 | link->hw_sata_spd_limit &= (1 << spd) - 1; | |
6739 | ||
6740 | link->sata_spd_limit = link->hw_sata_spd_limit; | |
6741 | ||
6742 | return 0; | |
6743 | } | |
6744 | ||
1da177e4 | 6745 | /** |
f3187195 TH |
6746 | * ata_port_alloc - allocate and initialize basic ATA port resources |
6747 | * @host: ATA host this allocated port belongs to | |
1da177e4 | 6748 | * |
f3187195 TH |
6749 | * Allocate and initialize basic ATA port resources. |
6750 | * | |
6751 | * RETURNS: | |
6752 | * Allocate ATA port on success, NULL on failure. | |
0cba632b | 6753 | * |
1da177e4 | 6754 | * LOCKING: |
f3187195 | 6755 | * Inherited from calling layer (may sleep). |
1da177e4 | 6756 | */ |
f3187195 | 6757 | struct ata_port *ata_port_alloc(struct ata_host *host) |
1da177e4 | 6758 | { |
f3187195 | 6759 | struct ata_port *ap; |
1da177e4 | 6760 | |
f3187195 TH |
6761 | DPRINTK("ENTER\n"); |
6762 | ||
6763 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); | |
6764 | if (!ap) | |
6765 | return NULL; | |
6766 | ||
f4d6d004 | 6767 | ap->pflags |= ATA_PFLAG_INITIALIZING; |
cca3974e | 6768 | ap->lock = &host->lock; |
198e0fed | 6769 | ap->flags = ATA_FLAG_DISABLED; |
f3187195 | 6770 | ap->print_id = -1; |
1da177e4 | 6771 | ap->ctl = ATA_DEVCTL_OBS; |
cca3974e | 6772 | ap->host = host; |
f3187195 | 6773 | ap->dev = host->dev; |
1da177e4 | 6774 | ap->last_ctl = 0xFF; |
bd5d825c BP |
6775 | |
6776 | #if defined(ATA_VERBOSE_DEBUG) | |
6777 | /* turn on all debugging levels */ | |
6778 | ap->msg_enable = 0x00FF; | |
6779 | #elif defined(ATA_DEBUG) | |
6780 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; | |
88574551 | 6781 | #else |
0dd4b21f | 6782 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
bd5d825c | 6783 | #endif |
1da177e4 | 6784 | |
65f27f38 DH |
6785 | INIT_DELAYED_WORK(&ap->port_task, NULL); |
6786 | INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); | |
6787 | INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); | |
a72ec4ce | 6788 | INIT_LIST_HEAD(&ap->eh_done_q); |
c6cf9e99 | 6789 | init_waitqueue_head(&ap->eh_wait_q); |
5ddf24c5 TH |
6790 | init_timer_deferrable(&ap->fastdrain_timer); |
6791 | ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; | |
6792 | ap->fastdrain_timer.data = (unsigned long)ap; | |
1da177e4 | 6793 | |
838df628 | 6794 | ap->cbl = ATA_CBL_NONE; |
838df628 | 6795 | |
8989805d | 6796 | ata_link_init(ap, &ap->link, 0); |
1da177e4 LT |
6797 | |
6798 | #ifdef ATA_IRQ_TRAP | |
6799 | ap->stats.unhandled_irq = 1; | |
6800 | ap->stats.idle_irq = 1; | |
6801 | #endif | |
1da177e4 | 6802 | return ap; |
1da177e4 LT |
6803 | } |
6804 | ||
f0d36efd TH |
6805 | static void ata_host_release(struct device *gendev, void *res) |
6806 | { | |
6807 | struct ata_host *host = dev_get_drvdata(gendev); | |
6808 | int i; | |
6809 | ||
1aa506e4 TH |
6810 | for (i = 0; i < host->n_ports; i++) { |
6811 | struct ata_port *ap = host->ports[i]; | |
6812 | ||
4911487a TH |
6813 | if (!ap) |
6814 | continue; | |
6815 | ||
6816 | if (ap->scsi_host) | |
1aa506e4 TH |
6817 | scsi_host_put(ap->scsi_host); |
6818 | ||
633273a3 | 6819 | kfree(ap->pmp_link); |
4911487a | 6820 | kfree(ap); |
1aa506e4 TH |
6821 | host->ports[i] = NULL; |
6822 | } | |
6823 | ||
1aa56cca | 6824 | dev_set_drvdata(gendev, NULL); |
f0d36efd TH |
6825 | } |
6826 | ||
f3187195 TH |
6827 | /** |
6828 | * ata_host_alloc - allocate and init basic ATA host resources | |
6829 | * @dev: generic device this host is associated with | |
6830 | * @max_ports: maximum number of ATA ports associated with this host | |
6831 | * | |
6832 | * Allocate and initialize basic ATA host resources. LLD calls | |
6833 | * this function to allocate a host, initializes it fully and | |
6834 | * attaches it using ata_host_register(). | |
6835 | * | |
6836 | * @max_ports ports are allocated and host->n_ports is | |
6837 | * initialized to @max_ports. The caller is allowed to decrease | |
6838 | * host->n_ports before calling ata_host_register(). The unused | |
6839 | * ports will be automatically freed on registration. | |
6840 | * | |
6841 | * RETURNS: | |
6842 | * Allocate ATA host on success, NULL on failure. | |
6843 | * | |
6844 | * LOCKING: | |
6845 | * Inherited from calling layer (may sleep). | |
6846 | */ | |
6847 | struct ata_host *ata_host_alloc(struct device *dev, int max_ports) | |
6848 | { | |
6849 | struct ata_host *host; | |
6850 | size_t sz; | |
6851 | int i; | |
6852 | ||
6853 | DPRINTK("ENTER\n"); | |
6854 | ||
6855 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) | |
6856 | return NULL; | |
6857 | ||
6858 | /* alloc a container for our list of ATA ports (buses) */ | |
6859 | sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); | |
6860 | /* alloc a container for our list of ATA ports (buses) */ | |
6861 | host = devres_alloc(ata_host_release, sz, GFP_KERNEL); | |
6862 | if (!host) | |
6863 | goto err_out; | |
6864 | ||
6865 | devres_add(dev, host); | |
6866 | dev_set_drvdata(dev, host); | |
6867 | ||
6868 | spin_lock_init(&host->lock); | |
6869 | host->dev = dev; | |
6870 | host->n_ports = max_ports; | |
6871 | ||
6872 | /* allocate ports bound to this host */ | |
6873 | for (i = 0; i < max_ports; i++) { | |
6874 | struct ata_port *ap; | |
6875 | ||
6876 | ap = ata_port_alloc(host); | |
6877 | if (!ap) | |
6878 | goto err_out; | |
6879 | ||
6880 | ap->port_no = i; | |
6881 | host->ports[i] = ap; | |
6882 | } | |
6883 | ||
6884 | devres_remove_group(dev, NULL); | |
6885 | return host; | |
6886 | ||
6887 | err_out: | |
6888 | devres_release_group(dev, NULL); | |
6889 | return NULL; | |
6890 | } | |
6891 | ||
f5cda257 TH |
6892 | /** |
6893 | * ata_host_alloc_pinfo - alloc host and init with port_info array | |
6894 | * @dev: generic device this host is associated with | |
6895 | * @ppi: array of ATA port_info to initialize host with | |
6896 | * @n_ports: number of ATA ports attached to this host | |
6897 | * | |
6898 | * Allocate ATA host and initialize with info from @ppi. If NULL | |
6899 | * terminated, @ppi may contain fewer entries than @n_ports. The | |
6900 | * last entry will be used for the remaining ports. | |
6901 | * | |
6902 | * RETURNS: | |
6903 | * Allocate ATA host on success, NULL on failure. | |
6904 | * | |
6905 | * LOCKING: | |
6906 | * Inherited from calling layer (may sleep). | |
6907 | */ | |
6908 | struct ata_host *ata_host_alloc_pinfo(struct device *dev, | |
6909 | const struct ata_port_info * const * ppi, | |
6910 | int n_ports) | |
6911 | { | |
6912 | const struct ata_port_info *pi; | |
6913 | struct ata_host *host; | |
6914 | int i, j; | |
6915 | ||
6916 | host = ata_host_alloc(dev, n_ports); | |
6917 | if (!host) | |
6918 | return NULL; | |
6919 | ||
6920 | for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { | |
6921 | struct ata_port *ap = host->ports[i]; | |
6922 | ||
6923 | if (ppi[j]) | |
6924 | pi = ppi[j++]; | |
6925 | ||
6926 | ap->pio_mask = pi->pio_mask; | |
6927 | ap->mwdma_mask = pi->mwdma_mask; | |
6928 | ap->udma_mask = pi->udma_mask; | |
6929 | ap->flags |= pi->flags; | |
0c88758b | 6930 | ap->link.flags |= pi->link_flags; |
f5cda257 TH |
6931 | ap->ops = pi->port_ops; |
6932 | ||
6933 | if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) | |
6934 | host->ops = pi->port_ops; | |
6935 | if (!host->private_data && pi->private_data) | |
6936 | host->private_data = pi->private_data; | |
6937 | } | |
6938 | ||
6939 | return host; | |
6940 | } | |
6941 | ||
32ebbc0c TH |
6942 | static void ata_host_stop(struct device *gendev, void *res) |
6943 | { | |
6944 | struct ata_host *host = dev_get_drvdata(gendev); | |
6945 | int i; | |
6946 | ||
6947 | WARN_ON(!(host->flags & ATA_HOST_STARTED)); | |
6948 | ||
6949 | for (i = 0; i < host->n_ports; i++) { | |
6950 | struct ata_port *ap = host->ports[i]; | |
6951 | ||
6952 | if (ap->ops->port_stop) | |
6953 | ap->ops->port_stop(ap); | |
6954 | } | |
6955 | ||
6956 | if (host->ops->host_stop) | |
6957 | host->ops->host_stop(host); | |
6958 | } | |
6959 | ||
ecef7253 TH |
6960 | /** |
6961 | * ata_host_start - start and freeze ports of an ATA host | |
6962 | * @host: ATA host to start ports for | |
6963 | * | |
6964 | * Start and then freeze ports of @host. Started status is | |
6965 | * recorded in host->flags, so this function can be called | |
6966 | * multiple times. Ports are guaranteed to get started only | |
f3187195 TH |
6967 | * once. If host->ops isn't initialized yet, its set to the |
6968 | * first non-dummy port ops. | |
ecef7253 TH |
6969 | * |
6970 | * LOCKING: | |
6971 | * Inherited from calling layer (may sleep). | |
6972 | * | |
6973 | * RETURNS: | |
6974 | * 0 if all ports are started successfully, -errno otherwise. | |
6975 | */ | |
6976 | int ata_host_start(struct ata_host *host) | |
6977 | { | |
32ebbc0c TH |
6978 | int have_stop = 0; |
6979 | void *start_dr = NULL; | |
ecef7253 TH |
6980 | int i, rc; |
6981 | ||
6982 | if (host->flags & ATA_HOST_STARTED) | |
6983 | return 0; | |
6984 | ||
6985 | for (i = 0; i < host->n_ports; i++) { | |
6986 | struct ata_port *ap = host->ports[i]; | |
6987 | ||
f3187195 TH |
6988 | if (!host->ops && !ata_port_is_dummy(ap)) |
6989 | host->ops = ap->ops; | |
6990 | ||
32ebbc0c TH |
6991 | if (ap->ops->port_stop) |
6992 | have_stop = 1; | |
6993 | } | |
6994 | ||
6995 | if (host->ops->host_stop) | |
6996 | have_stop = 1; | |
6997 | ||
6998 | if (have_stop) { | |
6999 | start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); | |
7000 | if (!start_dr) | |
7001 | return -ENOMEM; | |
7002 | } | |
7003 | ||
7004 | for (i = 0; i < host->n_ports; i++) { | |
7005 | struct ata_port *ap = host->ports[i]; | |
7006 | ||
ecef7253 TH |
7007 | if (ap->ops->port_start) { |
7008 | rc = ap->ops->port_start(ap); | |
7009 | if (rc) { | |
0f9fe9b7 | 7010 | if (rc != -ENODEV) |
0f757743 AM |
7011 | dev_printk(KERN_ERR, host->dev, |
7012 | "failed to start port %d " | |
7013 | "(errno=%d)\n", i, rc); | |
ecef7253 TH |
7014 | goto err_out; |
7015 | } | |
7016 | } | |
ecef7253 TH |
7017 | ata_eh_freeze_port(ap); |
7018 | } | |
7019 | ||
32ebbc0c TH |
7020 | if (start_dr) |
7021 | devres_add(host->dev, start_dr); | |
ecef7253 TH |
7022 | host->flags |= ATA_HOST_STARTED; |
7023 | return 0; | |
7024 | ||
7025 | err_out: | |
7026 | while (--i >= 0) { | |
7027 | struct ata_port *ap = host->ports[i]; | |
7028 | ||
7029 | if (ap->ops->port_stop) | |
7030 | ap->ops->port_stop(ap); | |
7031 | } | |
32ebbc0c | 7032 | devres_free(start_dr); |
ecef7253 TH |
7033 | return rc; |
7034 | } | |
7035 | ||
b03732f0 | 7036 | /** |
cca3974e JG |
7037 | * ata_sas_host_init - Initialize a host struct |
7038 | * @host: host to initialize | |
7039 | * @dev: device host is attached to | |
7040 | * @flags: host flags | |
7041 | * @ops: port_ops | |
b03732f0 BK |
7042 | * |
7043 | * LOCKING: | |
7044 | * PCI/etc. bus probe sem. | |
7045 | * | |
7046 | */ | |
f3187195 | 7047 | /* KILLME - the only user left is ipr */ |
cca3974e JG |
7048 | void ata_host_init(struct ata_host *host, struct device *dev, |
7049 | unsigned long flags, const struct ata_port_operations *ops) | |
b03732f0 | 7050 | { |
cca3974e JG |
7051 | spin_lock_init(&host->lock); |
7052 | host->dev = dev; | |
7053 | host->flags = flags; | |
7054 | host->ops = ops; | |
b03732f0 BK |
7055 | } |
7056 | ||
f3187195 TH |
7057 | /** |
7058 | * ata_host_register - register initialized ATA host | |
7059 | * @host: ATA host to register | |
7060 | * @sht: template for SCSI host | |
7061 | * | |
7062 | * Register initialized ATA host. @host is allocated using | |
7063 | * ata_host_alloc() and fully initialized by LLD. This function | |
7064 | * starts ports, registers @host with ATA and SCSI layers and | |
7065 | * probe registered devices. | |
7066 | * | |
7067 | * LOCKING: | |
7068 | * Inherited from calling layer (may sleep). | |
7069 | * | |
7070 | * RETURNS: | |
7071 | * 0 on success, -errno otherwise. | |
7072 | */ | |
7073 | int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) | |
7074 | { | |
7075 | int i, rc; | |
7076 | ||
7077 | /* host must have been started */ | |
7078 | if (!(host->flags & ATA_HOST_STARTED)) { | |
7079 | dev_printk(KERN_ERR, host->dev, | |
7080 | "BUG: trying to register unstarted host\n"); | |
7081 | WARN_ON(1); | |
7082 | return -EINVAL; | |
7083 | } | |
7084 | ||
7085 | /* Blow away unused ports. This happens when LLD can't | |
7086 | * determine the exact number of ports to allocate at | |
7087 | * allocation time. | |
7088 | */ | |
7089 | for (i = host->n_ports; host->ports[i]; i++) | |
7090 | kfree(host->ports[i]); | |
7091 | ||
7092 | /* give ports names and add SCSI hosts */ | |
7093 | for (i = 0; i < host->n_ports; i++) | |
7094 | host->ports[i]->print_id = ata_print_id++; | |
7095 | ||
7096 | rc = ata_scsi_add_hosts(host, sht); | |
7097 | if (rc) | |
7098 | return rc; | |
7099 | ||
fafbae87 TH |
7100 | /* associate with ACPI nodes */ |
7101 | ata_acpi_associate(host); | |
7102 | ||
f3187195 TH |
7103 | /* set cable, sata_spd_limit and report */ |
7104 | for (i = 0; i < host->n_ports; i++) { | |
7105 | struct ata_port *ap = host->ports[i]; | |
f3187195 TH |
7106 | unsigned long xfer_mask; |
7107 | ||
7108 | /* set SATA cable type if still unset */ | |
7109 | if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) | |
7110 | ap->cbl = ATA_CBL_SATA; | |
7111 | ||
7112 | /* init sata_spd_limit to the current value */ | |
4fb37a25 | 7113 | sata_link_init_spd(&ap->link); |
f3187195 | 7114 | |
cbcdd875 | 7115 | /* print per-port info to dmesg */ |
f3187195 TH |
7116 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, |
7117 | ap->udma_mask); | |
7118 | ||
abf6e8ed | 7119 | if (!ata_port_is_dummy(ap)) { |
cbcdd875 TH |
7120 | ata_port_printk(ap, KERN_INFO, |
7121 | "%cATA max %s %s\n", | |
a16abc0b | 7122 | (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', |
f3187195 | 7123 | ata_mode_string(xfer_mask), |
cbcdd875 | 7124 | ap->link.eh_info.desc); |
abf6e8ed TH |
7125 | ata_ehi_clear_desc(&ap->link.eh_info); |
7126 | } else | |
f3187195 TH |
7127 | ata_port_printk(ap, KERN_INFO, "DUMMY\n"); |
7128 | } | |
7129 | ||
7130 | /* perform each probe synchronously */ | |
7131 | DPRINTK("probe begin\n"); | |
7132 | for (i = 0; i < host->n_ports; i++) { | |
7133 | struct ata_port *ap = host->ports[i]; | |
7134 | int rc; | |
7135 | ||
7136 | /* probe */ | |
7137 | if (ap->ops->error_handler) { | |
9af5c9c9 | 7138 | struct ata_eh_info *ehi = &ap->link.eh_info; |
f3187195 TH |
7139 | unsigned long flags; |
7140 | ||
7141 | ata_port_probe(ap); | |
7142 | ||
7143 | /* kick EH for boot probing */ | |
7144 | spin_lock_irqsave(ap->lock, flags); | |
7145 | ||
f58229f8 TH |
7146 | ehi->probe_mask = |
7147 | (1 << ata_link_max_devices(&ap->link)) - 1; | |
f3187195 TH |
7148 | ehi->action |= ATA_EH_SOFTRESET; |
7149 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; | |
7150 | ||
f4d6d004 | 7151 | ap->pflags &= ~ATA_PFLAG_INITIALIZING; |
f3187195 TH |
7152 | ap->pflags |= ATA_PFLAG_LOADING; |
7153 | ata_port_schedule_eh(ap); | |
7154 | ||
7155 | spin_unlock_irqrestore(ap->lock, flags); | |
7156 | ||
7157 | /* wait for EH to finish */ | |
7158 | ata_port_wait_eh(ap); | |
7159 | } else { | |
7160 | DPRINTK("ata%u: bus probe begin\n", ap->print_id); | |
7161 | rc = ata_bus_probe(ap); | |
7162 | DPRINTK("ata%u: bus probe end\n", ap->print_id); | |
7163 | ||
7164 | if (rc) { | |
7165 | /* FIXME: do something useful here? | |
7166 | * Current libata behavior will | |
7167 | * tear down everything when | |
7168 | * the module is removed | |
7169 | * or the h/w is unplugged. | |
7170 | */ | |
7171 | } | |
7172 | } | |
7173 | } | |
7174 | ||
7175 | /* probes are done, now scan each port's disk(s) */ | |
7176 | DPRINTK("host probe begin\n"); | |
7177 | for (i = 0; i < host->n_ports; i++) { | |
7178 | struct ata_port *ap = host->ports[i]; | |
7179 | ||
1ae46317 | 7180 | ata_scsi_scan_host(ap, 1); |
ca77329f | 7181 | ata_lpm_schedule(ap, ap->pm_policy); |
f3187195 TH |
7182 | } |
7183 | ||
7184 | return 0; | |
7185 | } | |
7186 | ||
f5cda257 TH |
7187 | /** |
7188 | * ata_host_activate - start host, request IRQ and register it | |
7189 | * @host: target ATA host | |
7190 | * @irq: IRQ to request | |
7191 | * @irq_handler: irq_handler used when requesting IRQ | |
7192 | * @irq_flags: irq_flags used when requesting IRQ | |
7193 | * @sht: scsi_host_template to use when registering the host | |
7194 | * | |
7195 | * After allocating an ATA host and initializing it, most libata | |
7196 | * LLDs perform three steps to activate the host - start host, | |
7197 | * request IRQ and register it. This helper takes necessasry | |
7198 | * arguments and performs the three steps in one go. | |
7199 | * | |
3d46b2e2 PM |
7200 | * An invalid IRQ skips the IRQ registration and expects the host to |
7201 | * have set polling mode on the port. In this case, @irq_handler | |
7202 | * should be NULL. | |
7203 | * | |
f5cda257 TH |
7204 | * LOCKING: |
7205 | * Inherited from calling layer (may sleep). | |
7206 | * | |
7207 | * RETURNS: | |
7208 | * 0 on success, -errno otherwise. | |
7209 | */ | |
7210 | int ata_host_activate(struct ata_host *host, int irq, | |
7211 | irq_handler_t irq_handler, unsigned long irq_flags, | |
7212 | struct scsi_host_template *sht) | |
7213 | { | |
cbcdd875 | 7214 | int i, rc; |
f5cda257 TH |
7215 | |
7216 | rc = ata_host_start(host); | |
7217 | if (rc) | |
7218 | return rc; | |
7219 | ||
3d46b2e2 PM |
7220 | /* Special case for polling mode */ |
7221 | if (!irq) { | |
7222 | WARN_ON(irq_handler); | |
7223 | return ata_host_register(host, sht); | |
7224 | } | |
7225 | ||
f5cda257 TH |
7226 | rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, |
7227 | dev_driver_string(host->dev), host); | |
7228 | if (rc) | |
7229 | return rc; | |
7230 | ||
cbcdd875 TH |
7231 | for (i = 0; i < host->n_ports; i++) |
7232 | ata_port_desc(host->ports[i], "irq %d", irq); | |
4031826b | 7233 | |
f5cda257 TH |
7234 | rc = ata_host_register(host, sht); |
7235 | /* if failed, just free the IRQ and leave ports alone */ | |
7236 | if (rc) | |
7237 | devm_free_irq(host->dev, irq, host); | |
7238 | ||
7239 | return rc; | |
7240 | } | |
7241 | ||
720ba126 TH |
7242 | /** |
7243 | * ata_port_detach - Detach ATA port in prepration of device removal | |
7244 | * @ap: ATA port to be detached | |
7245 | * | |
7246 | * Detach all ATA devices and the associated SCSI devices of @ap; | |
7247 | * then, remove the associated SCSI host. @ap is guaranteed to | |
7248 | * be quiescent on return from this function. | |
7249 | * | |
7250 | * LOCKING: | |
7251 | * Kernel thread context (may sleep). | |
7252 | */ | |
741b7763 | 7253 | static void ata_port_detach(struct ata_port *ap) |
720ba126 TH |
7254 | { |
7255 | unsigned long flags; | |
41bda9c9 | 7256 | struct ata_link *link; |
f58229f8 | 7257 | struct ata_device *dev; |
720ba126 TH |
7258 | |
7259 | if (!ap->ops->error_handler) | |
c3cf30a9 | 7260 | goto skip_eh; |
720ba126 TH |
7261 | |
7262 | /* tell EH we're leaving & flush EH */ | |
ba6a1308 | 7263 | spin_lock_irqsave(ap->lock, flags); |
b51e9e5d | 7264 | ap->pflags |= ATA_PFLAG_UNLOADING; |
ba6a1308 | 7265 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
7266 | |
7267 | ata_port_wait_eh(ap); | |
7268 | ||
7f9ad9b8 TH |
7269 | /* EH is now guaranteed to see UNLOADING - EH context belongs |
7270 | * to us. Disable all existing devices. | |
720ba126 | 7271 | */ |
41bda9c9 TH |
7272 | ata_port_for_each_link(link, ap) { |
7273 | ata_link_for_each_dev(dev, link) | |
7274 | ata_dev_disable(dev); | |
7275 | } | |
720ba126 | 7276 | |
720ba126 TH |
7277 | /* Final freeze & EH. All in-flight commands are aborted. EH |
7278 | * will be skipped and retrials will be terminated with bad | |
7279 | * target. | |
7280 | */ | |
ba6a1308 | 7281 | spin_lock_irqsave(ap->lock, flags); |
720ba126 | 7282 | ata_port_freeze(ap); /* won't be thawed */ |
ba6a1308 | 7283 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
7284 | |
7285 | ata_port_wait_eh(ap); | |
45a66c1c | 7286 | cancel_rearming_delayed_work(&ap->hotplug_task); |
720ba126 | 7287 | |
c3cf30a9 | 7288 | skip_eh: |
720ba126 | 7289 | /* remove the associated SCSI host */ |
cca3974e | 7290 | scsi_remove_host(ap->scsi_host); |
720ba126 TH |
7291 | } |
7292 | ||
0529c159 TH |
7293 | /** |
7294 | * ata_host_detach - Detach all ports of an ATA host | |
7295 | * @host: Host to detach | |
7296 | * | |
7297 | * Detach all ports of @host. | |
7298 | * | |
7299 | * LOCKING: | |
7300 | * Kernel thread context (may sleep). | |
7301 | */ | |
7302 | void ata_host_detach(struct ata_host *host) | |
7303 | { | |
7304 | int i; | |
7305 | ||
7306 | for (i = 0; i < host->n_ports; i++) | |
7307 | ata_port_detach(host->ports[i]); | |
562f0c2d TH |
7308 | |
7309 | /* the host is dead now, dissociate ACPI */ | |
7310 | ata_acpi_dissociate(host); | |
0529c159 TH |
7311 | } |
7312 | ||
1da177e4 LT |
7313 | /** |
7314 | * ata_std_ports - initialize ioaddr with standard port offsets. | |
7315 | * @ioaddr: IO address structure to be initialized | |
0baab86b EF |
7316 | * |
7317 | * Utility function which initializes data_addr, error_addr, | |
7318 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, | |
7319 | * device_addr, status_addr, and command_addr to standard offsets | |
7320 | * relative to cmd_addr. | |
7321 | * | |
7322 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. | |
1da177e4 | 7323 | */ |
0baab86b | 7324 | |
1da177e4 LT |
7325 | void ata_std_ports(struct ata_ioports *ioaddr) |
7326 | { | |
7327 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; | |
7328 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; | |
7329 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; | |
7330 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; | |
7331 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; | |
7332 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; | |
7333 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; | |
7334 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; | |
7335 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; | |
7336 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; | |
7337 | } | |
7338 | ||
0baab86b | 7339 | |
374b1873 JG |
7340 | #ifdef CONFIG_PCI |
7341 | ||
1da177e4 LT |
7342 | /** |
7343 | * ata_pci_remove_one - PCI layer callback for device removal | |
7344 | * @pdev: PCI device that was removed | |
7345 | * | |
b878ca5d TH |
7346 | * PCI layer indicates to libata via this hook that hot-unplug or |
7347 | * module unload event has occurred. Detach all ports. Resource | |
7348 | * release is handled via devres. | |
1da177e4 LT |
7349 | * |
7350 | * LOCKING: | |
7351 | * Inherited from PCI layer (may sleep). | |
7352 | */ | |
f0d36efd | 7353 | void ata_pci_remove_one(struct pci_dev *pdev) |
1da177e4 | 7354 | { |
2855568b | 7355 | struct device *dev = &pdev->dev; |
cca3974e | 7356 | struct ata_host *host = dev_get_drvdata(dev); |
1da177e4 | 7357 | |
b878ca5d | 7358 | ata_host_detach(host); |
1da177e4 LT |
7359 | } |
7360 | ||
7361 | /* move to PCI subsystem */ | |
057ace5e | 7362 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
7363 | { |
7364 | unsigned long tmp = 0; | |
7365 | ||
7366 | switch (bits->width) { | |
7367 | case 1: { | |
7368 | u8 tmp8 = 0; | |
7369 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
7370 | tmp = tmp8; | |
7371 | break; | |
7372 | } | |
7373 | case 2: { | |
7374 | u16 tmp16 = 0; | |
7375 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
7376 | tmp = tmp16; | |
7377 | break; | |
7378 | } | |
7379 | case 4: { | |
7380 | u32 tmp32 = 0; | |
7381 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
7382 | tmp = tmp32; | |
7383 | break; | |
7384 | } | |
7385 | ||
7386 | default: | |
7387 | return -EINVAL; | |
7388 | } | |
7389 | ||
7390 | tmp &= bits->mask; | |
7391 | ||
7392 | return (tmp == bits->val) ? 1 : 0; | |
7393 | } | |
9b847548 | 7394 | |
6ffa01d8 | 7395 | #ifdef CONFIG_PM |
3c5100c1 | 7396 | void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) |
9b847548 JA |
7397 | { |
7398 | pci_save_state(pdev); | |
4c90d971 | 7399 | pci_disable_device(pdev); |
500530f6 | 7400 | |
4c90d971 | 7401 | if (mesg.event == PM_EVENT_SUSPEND) |
500530f6 | 7402 | pci_set_power_state(pdev, PCI_D3hot); |
9b847548 JA |
7403 | } |
7404 | ||
553c4aa6 | 7405 | int ata_pci_device_do_resume(struct pci_dev *pdev) |
9b847548 | 7406 | { |
553c4aa6 TH |
7407 | int rc; |
7408 | ||
9b847548 JA |
7409 | pci_set_power_state(pdev, PCI_D0); |
7410 | pci_restore_state(pdev); | |
553c4aa6 | 7411 | |
b878ca5d | 7412 | rc = pcim_enable_device(pdev); |
553c4aa6 TH |
7413 | if (rc) { |
7414 | dev_printk(KERN_ERR, &pdev->dev, | |
7415 | "failed to enable device after resume (%d)\n", rc); | |
7416 | return rc; | |
7417 | } | |
7418 | ||
9b847548 | 7419 | pci_set_master(pdev); |
553c4aa6 | 7420 | return 0; |
500530f6 TH |
7421 | } |
7422 | ||
3c5100c1 | 7423 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) |
500530f6 | 7424 | { |
cca3974e | 7425 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
500530f6 TH |
7426 | int rc = 0; |
7427 | ||
cca3974e | 7428 | rc = ata_host_suspend(host, mesg); |
500530f6 TH |
7429 | if (rc) |
7430 | return rc; | |
7431 | ||
3c5100c1 | 7432 | ata_pci_device_do_suspend(pdev, mesg); |
500530f6 TH |
7433 | |
7434 | return 0; | |
7435 | } | |
7436 | ||
7437 | int ata_pci_device_resume(struct pci_dev *pdev) | |
7438 | { | |
cca3974e | 7439 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
553c4aa6 | 7440 | int rc; |
500530f6 | 7441 | |
553c4aa6 TH |
7442 | rc = ata_pci_device_do_resume(pdev); |
7443 | if (rc == 0) | |
7444 | ata_host_resume(host); | |
7445 | return rc; | |
9b847548 | 7446 | } |
6ffa01d8 TH |
7447 | #endif /* CONFIG_PM */ |
7448 | ||
1da177e4 LT |
7449 | #endif /* CONFIG_PCI */ |
7450 | ||
7451 | ||
1da177e4 LT |
7452 | static int __init ata_init(void) |
7453 | { | |
a8601e5f | 7454 | ata_probe_timeout *= HZ; |
1da177e4 LT |
7455 | ata_wq = create_workqueue("ata"); |
7456 | if (!ata_wq) | |
7457 | return -ENOMEM; | |
7458 | ||
453b07ac TH |
7459 | ata_aux_wq = create_singlethread_workqueue("ata_aux"); |
7460 | if (!ata_aux_wq) { | |
7461 | destroy_workqueue(ata_wq); | |
7462 | return -ENOMEM; | |
7463 | } | |
7464 | ||
1da177e4 LT |
7465 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
7466 | return 0; | |
7467 | } | |
7468 | ||
7469 | static void __exit ata_exit(void) | |
7470 | { | |
7471 | destroy_workqueue(ata_wq); | |
453b07ac | 7472 | destroy_workqueue(ata_aux_wq); |
1da177e4 LT |
7473 | } |
7474 | ||
a4625085 | 7475 | subsys_initcall(ata_init); |
1da177e4 LT |
7476 | module_exit(ata_exit); |
7477 | ||
67846b30 | 7478 | static unsigned long ratelimit_time; |
34af946a | 7479 | static DEFINE_SPINLOCK(ata_ratelimit_lock); |
67846b30 JG |
7480 | |
7481 | int ata_ratelimit(void) | |
7482 | { | |
7483 | int rc; | |
7484 | unsigned long flags; | |
7485 | ||
7486 | spin_lock_irqsave(&ata_ratelimit_lock, flags); | |
7487 | ||
7488 | if (time_after(jiffies, ratelimit_time)) { | |
7489 | rc = 1; | |
7490 | ratelimit_time = jiffies + (HZ/5); | |
7491 | } else | |
7492 | rc = 0; | |
7493 | ||
7494 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); | |
7495 | ||
7496 | return rc; | |
7497 | } | |
7498 | ||
c22daff4 TH |
7499 | /** |
7500 | * ata_wait_register - wait until register value changes | |
7501 | * @reg: IO-mapped register | |
7502 | * @mask: Mask to apply to read register value | |
7503 | * @val: Wait condition | |
7504 | * @interval_msec: polling interval in milliseconds | |
7505 | * @timeout_msec: timeout in milliseconds | |
7506 | * | |
7507 | * Waiting for some bits of register to change is a common | |
7508 | * operation for ATA controllers. This function reads 32bit LE | |
7509 | * IO-mapped register @reg and tests for the following condition. | |
7510 | * | |
7511 | * (*@reg & mask) != val | |
7512 | * | |
7513 | * If the condition is met, it returns; otherwise, the process is | |
7514 | * repeated after @interval_msec until timeout. | |
7515 | * | |
7516 | * LOCKING: | |
7517 | * Kernel thread context (may sleep) | |
7518 | * | |
7519 | * RETURNS: | |
7520 | * The final register value. | |
7521 | */ | |
7522 | u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, | |
7523 | unsigned long interval_msec, | |
7524 | unsigned long timeout_msec) | |
7525 | { | |
7526 | unsigned long timeout; | |
7527 | u32 tmp; | |
7528 | ||
7529 | tmp = ioread32(reg); | |
7530 | ||
7531 | /* Calculate timeout _after_ the first read to make sure | |
7532 | * preceding writes reach the controller before starting to | |
7533 | * eat away the timeout. | |
7534 | */ | |
7535 | timeout = jiffies + (timeout_msec * HZ) / 1000; | |
7536 | ||
7537 | while ((tmp & mask) == val && time_before(jiffies, timeout)) { | |
7538 | msleep(interval_msec); | |
7539 | tmp = ioread32(reg); | |
7540 | } | |
7541 | ||
7542 | return tmp; | |
7543 | } | |
7544 | ||
dd5b06c4 TH |
7545 | /* |
7546 | * Dummy port_ops | |
7547 | */ | |
7548 | static void ata_dummy_noret(struct ata_port *ap) { } | |
7549 | static int ata_dummy_ret0(struct ata_port *ap) { return 0; } | |
7550 | static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } | |
7551 | ||
7552 | static u8 ata_dummy_check_status(struct ata_port *ap) | |
7553 | { | |
7554 | return ATA_DRDY; | |
7555 | } | |
7556 | ||
7557 | static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) | |
7558 | { | |
7559 | return AC_ERR_SYSTEM; | |
7560 | } | |
7561 | ||
7562 | const struct ata_port_operations ata_dummy_port_ops = { | |
dd5b06c4 TH |
7563 | .check_status = ata_dummy_check_status, |
7564 | .check_altstatus = ata_dummy_check_status, | |
7565 | .dev_select = ata_noop_dev_select, | |
7566 | .qc_prep = ata_noop_qc_prep, | |
7567 | .qc_issue = ata_dummy_qc_issue, | |
7568 | .freeze = ata_dummy_noret, | |
7569 | .thaw = ata_dummy_noret, | |
7570 | .error_handler = ata_dummy_noret, | |
7571 | .post_internal_cmd = ata_dummy_qc_noret, | |
7572 | .irq_clear = ata_dummy_noret, | |
7573 | .port_start = ata_dummy_ret0, | |
7574 | .port_stop = ata_dummy_noret, | |
7575 | }; | |
7576 | ||
21b0ad4f TH |
7577 | const struct ata_port_info ata_dummy_port_info = { |
7578 | .port_ops = &ata_dummy_port_ops, | |
7579 | }; | |
7580 | ||
1da177e4 LT |
7581 | /* |
7582 | * libata is essentially a library of internal helper functions for | |
7583 | * low-level ATA host controller drivers. As such, the API/ABI is | |
7584 | * likely to change as new drivers are added and updated. | |
7585 | * Do not depend on ABI/API stability. | |
7586 | */ | |
e9c83914 TH |
7587 | EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
7588 | EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); | |
7589 | EXPORT_SYMBOL_GPL(sata_deb_timing_long); | |
dd5b06c4 | 7590 | EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
21b0ad4f | 7591 | EXPORT_SYMBOL_GPL(ata_dummy_port_info); |
1da177e4 LT |
7592 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
7593 | EXPORT_SYMBOL_GPL(ata_std_ports); | |
cca3974e | 7594 | EXPORT_SYMBOL_GPL(ata_host_init); |
f3187195 | 7595 | EXPORT_SYMBOL_GPL(ata_host_alloc); |
f5cda257 | 7596 | EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); |
ecef7253 | 7597 | EXPORT_SYMBOL_GPL(ata_host_start); |
f3187195 | 7598 | EXPORT_SYMBOL_GPL(ata_host_register); |
f5cda257 | 7599 | EXPORT_SYMBOL_GPL(ata_host_activate); |
0529c159 | 7600 | EXPORT_SYMBOL_GPL(ata_host_detach); |
1da177e4 LT |
7601 | EXPORT_SYMBOL_GPL(ata_sg_init); |
7602 | EXPORT_SYMBOL_GPL(ata_sg_init_one); | |
9a1004d0 | 7603 | EXPORT_SYMBOL_GPL(ata_hsm_move); |
f686bcb8 | 7604 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
dedaf2b0 | 7605 | EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); |
1da177e4 | 7606 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
1da177e4 LT |
7607 | EXPORT_SYMBOL_GPL(ata_tf_load); |
7608 | EXPORT_SYMBOL_GPL(ata_tf_read); | |
7609 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); | |
7610 | EXPORT_SYMBOL_GPL(ata_std_dev_select); | |
43727fbc | 7611 | EXPORT_SYMBOL_GPL(sata_print_link_status); |
1da177e4 LT |
7612 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
7613 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
7614 | EXPORT_SYMBOL_GPL(ata_check_status); | |
7615 | EXPORT_SYMBOL_GPL(ata_altstatus); | |
1da177e4 LT |
7616 | EXPORT_SYMBOL_GPL(ata_exec_command); |
7617 | EXPORT_SYMBOL_GPL(ata_port_start); | |
d92e74d3 | 7618 | EXPORT_SYMBOL_GPL(ata_sff_port_start); |
1da177e4 | 7619 | EXPORT_SYMBOL_GPL(ata_interrupt); |
04351821 | 7620 | EXPORT_SYMBOL_GPL(ata_do_set_mode); |
0d5ff566 TH |
7621 | EXPORT_SYMBOL_GPL(ata_data_xfer); |
7622 | EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); | |
31cc23b3 | 7623 | EXPORT_SYMBOL_GPL(ata_std_qc_defer); |
1da177e4 | 7624 | EXPORT_SYMBOL_GPL(ata_qc_prep); |
d26fc955 | 7625 | EXPORT_SYMBOL_GPL(ata_dumb_qc_prep); |
e46834cd | 7626 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
1da177e4 LT |
7627 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
7628 | EXPORT_SYMBOL_GPL(ata_bmdma_start); | |
7629 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); | |
7630 | EXPORT_SYMBOL_GPL(ata_bmdma_status); | |
7631 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); | |
6d97dbd7 TH |
7632 | EXPORT_SYMBOL_GPL(ata_bmdma_freeze); |
7633 | EXPORT_SYMBOL_GPL(ata_bmdma_thaw); | |
7634 | EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); | |
7635 | EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); | |
7636 | EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); | |
1da177e4 | 7637 | EXPORT_SYMBOL_GPL(ata_port_probe); |
10305f0f | 7638 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
3c567b7d | 7639 | EXPORT_SYMBOL_GPL(sata_set_spd); |
936fd732 TH |
7640 | EXPORT_SYMBOL_GPL(sata_link_debounce); |
7641 | EXPORT_SYMBOL_GPL(sata_link_resume); | |
1da177e4 | 7642 | EXPORT_SYMBOL_GPL(ata_bus_reset); |
f5914a46 | 7643 | EXPORT_SYMBOL_GPL(ata_std_prereset); |
c2bd5804 | 7644 | EXPORT_SYMBOL_GPL(ata_std_softreset); |
cc0680a5 | 7645 | EXPORT_SYMBOL_GPL(sata_link_hardreset); |
c2bd5804 TH |
7646 | EXPORT_SYMBOL_GPL(sata_std_hardreset); |
7647 | EXPORT_SYMBOL_GPL(ata_std_postreset); | |
2e9edbf8 JG |
7648 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
7649 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
1da177e4 | 7650 | EXPORT_SYMBOL_GPL(ata_port_disable); |
67846b30 | 7651 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
c22daff4 | 7652 | EXPORT_SYMBOL_GPL(ata_wait_register); |
6f8b9958 | 7653 | EXPORT_SYMBOL_GPL(ata_busy_sleep); |
88ff6eaf | 7654 | EXPORT_SYMBOL_GPL(ata_wait_after_reset); |
d4b2bab4 | 7655 | EXPORT_SYMBOL_GPL(ata_wait_ready); |
86e45b6b | 7656 | EXPORT_SYMBOL_GPL(ata_port_queue_task); |
1da177e4 LT |
7657 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
7658 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); | |
1da177e4 | 7659 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
83c47bcb | 7660 | EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); |
a6e6ce8e | 7661 | EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); |
1da177e4 | 7662 | EXPORT_SYMBOL_GPL(ata_host_intr); |
34bf2170 TH |
7663 | EXPORT_SYMBOL_GPL(sata_scr_valid); |
7664 | EXPORT_SYMBOL_GPL(sata_scr_read); | |
7665 | EXPORT_SYMBOL_GPL(sata_scr_write); | |
7666 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); | |
936fd732 TH |
7667 | EXPORT_SYMBOL_GPL(ata_link_online); |
7668 | EXPORT_SYMBOL_GPL(ata_link_offline); | |
6ffa01d8 | 7669 | #ifdef CONFIG_PM |
cca3974e JG |
7670 | EXPORT_SYMBOL_GPL(ata_host_suspend); |
7671 | EXPORT_SYMBOL_GPL(ata_host_resume); | |
6ffa01d8 | 7672 | #endif /* CONFIG_PM */ |
6a62a04d TH |
7673 | EXPORT_SYMBOL_GPL(ata_id_string); |
7674 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
10305f0f | 7675 | EXPORT_SYMBOL_GPL(ata_id_to_dma_mode); |
1da177e4 LT |
7676 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
7677 | ||
1bc4ccff | 7678 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
452503f9 AC |
7679 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
7680 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
7681 | ||
1da177e4 LT |
7682 | #ifdef CONFIG_PCI |
7683 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
d583bc18 | 7684 | EXPORT_SYMBOL_GPL(ata_pci_init_sff_host); |
1626aeb8 | 7685 | EXPORT_SYMBOL_GPL(ata_pci_init_bmdma); |
d583bc18 | 7686 | EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host); |
1da177e4 LT |
7687 | EXPORT_SYMBOL_GPL(ata_pci_init_one); |
7688 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); | |
6ffa01d8 | 7689 | #ifdef CONFIG_PM |
500530f6 TH |
7690 | EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
7691 | EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); | |
9b847548 JA |
7692 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
7693 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
6ffa01d8 | 7694 | #endif /* CONFIG_PM */ |
67951ade AC |
7695 | EXPORT_SYMBOL_GPL(ata_pci_default_filter); |
7696 | EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); | |
1da177e4 | 7697 | #endif /* CONFIG_PCI */ |
9b847548 | 7698 | |
31f88384 | 7699 | EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch); |
3af9a77a TH |
7700 | EXPORT_SYMBOL_GPL(sata_pmp_std_prereset); |
7701 | EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset); | |
7702 | EXPORT_SYMBOL_GPL(sata_pmp_std_postreset); | |
7703 | EXPORT_SYMBOL_GPL(sata_pmp_do_eh); | |
7704 | ||
b64bbc39 TH |
7705 | EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); |
7706 | EXPORT_SYMBOL_GPL(ata_ehi_push_desc); | |
7707 | EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); | |
cbcdd875 TH |
7708 | EXPORT_SYMBOL_GPL(ata_port_desc); |
7709 | #ifdef CONFIG_PCI | |
7710 | EXPORT_SYMBOL_GPL(ata_port_pbar_desc); | |
7711 | #endif /* CONFIG_PCI */ | |
7b70fc03 | 7712 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
dbd82616 | 7713 | EXPORT_SYMBOL_GPL(ata_link_abort); |
7b70fc03 | 7714 | EXPORT_SYMBOL_GPL(ata_port_abort); |
e3180499 | 7715 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
7d77b247 | 7716 | EXPORT_SYMBOL_GPL(sata_async_notification); |
e3180499 TH |
7717 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
7718 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); | |
ece1d636 TH |
7719 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
7720 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
022bdb07 | 7721 | EXPORT_SYMBOL_GPL(ata_do_eh); |
83625006 | 7722 | EXPORT_SYMBOL_GPL(ata_irq_on); |
a619f981 | 7723 | EXPORT_SYMBOL_GPL(ata_dev_try_classify); |
be0d18df AC |
7724 | |
7725 | EXPORT_SYMBOL_GPL(ata_cable_40wire); | |
7726 | EXPORT_SYMBOL_GPL(ata_cable_80wire); | |
7727 | EXPORT_SYMBOL_GPL(ata_cable_unknown); | |
7728 | EXPORT_SYMBOL_GPL(ata_cable_sata); |