Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-core.c - helper library for ATA |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from http://www.t13.org/ and | |
31 | * http://www.sata-io.org/ | |
32 | * | |
1da177e4 LT |
33 | */ |
34 | ||
1da177e4 LT |
35 | #include <linux/kernel.h> |
36 | #include <linux/module.h> | |
37 | #include <linux/pci.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/list.h> | |
40 | #include <linux/mm.h> | |
41 | #include <linux/highmem.h> | |
42 | #include <linux/spinlock.h> | |
43 | #include <linux/blkdev.h> | |
44 | #include <linux/delay.h> | |
45 | #include <linux/timer.h> | |
46 | #include <linux/interrupt.h> | |
47 | #include <linux/completion.h> | |
48 | #include <linux/suspend.h> | |
49 | #include <linux/workqueue.h> | |
67846b30 | 50 | #include <linux/jiffies.h> |
378f058c | 51 | #include <linux/scatterlist.h> |
1da177e4 | 52 | #include <scsi/scsi.h> |
193515d5 | 53 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
54 | #include <scsi/scsi_host.h> |
55 | #include <linux/libata.h> | |
56 | #include <asm/io.h> | |
57 | #include <asm/semaphore.h> | |
58 | #include <asm/byteorder.h> | |
59 | ||
60 | #include "libata.h" | |
61 | ||
fda0efc5 | 62 | |
d7bb4cc7 | 63 | /* debounce timing parameters in msecs { interval, duration, timeout } */ |
e9c83914 TH |
64 | const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; |
65 | const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; | |
66 | const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; | |
d7bb4cc7 | 67 | |
3373efd8 TH |
68 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
69 | u16 heads, u16 sectors); | |
70 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev); | |
9f45cbd3 | 71 | static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable); |
3373efd8 | 72 | static void ata_dev_xfermask(struct ata_device *dev); |
75683fe7 | 73 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev); |
1da177e4 | 74 | |
f3187195 | 75 | unsigned int ata_print_id = 1; |
1da177e4 LT |
76 | static struct workqueue_struct *ata_wq; |
77 | ||
453b07ac TH |
78 | struct workqueue_struct *ata_aux_wq; |
79 | ||
418dc1f5 | 80 | int atapi_enabled = 1; |
1623c81e JG |
81 | module_param(atapi_enabled, int, 0444); |
82 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); | |
83 | ||
95de719a AL |
84 | int atapi_dmadir = 0; |
85 | module_param(atapi_dmadir, int, 0444); | |
86 | MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); | |
87 | ||
baf4fdfa ML |
88 | int atapi_passthru16 = 1; |
89 | module_param(atapi_passthru16, int, 0444); | |
90 | MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)"); | |
91 | ||
c3c013a2 JG |
92 | int libata_fua = 0; |
93 | module_param_named(fua, libata_fua, int, 0444); | |
94 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); | |
95 | ||
1e999736 AC |
96 | static int ata_ignore_hpa = 0; |
97 | module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); | |
98 | MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); | |
99 | ||
b3a70601 AC |
100 | static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; |
101 | module_param_named(dma, libata_dma_mask, int, 0444); | |
102 | MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); | |
103 | ||
a8601e5f AM |
104 | static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; |
105 | module_param(ata_probe_timeout, int, 0444); | |
106 | MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); | |
107 | ||
6ebe9d86 | 108 | int libata_noacpi = 0; |
d7d0dad6 | 109 | module_param_named(noacpi, libata_noacpi, int, 0444); |
6ebe9d86 | 110 | MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set"); |
11ef697b | 111 | |
1da177e4 LT |
112 | MODULE_AUTHOR("Jeff Garzik"); |
113 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
114 | MODULE_LICENSE("GPL"); | |
115 | MODULE_VERSION(DRV_VERSION); | |
116 | ||
0baab86b | 117 | |
1da177e4 LT |
118 | /** |
119 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
120 | * @tf: Taskfile to convert | |
1da177e4 | 121 | * @pmp: Port multiplier port |
9977126c TH |
122 | * @is_cmd: This FIS is for command |
123 | * @fis: Buffer into which data will output | |
1da177e4 LT |
124 | * |
125 | * Converts a standard ATA taskfile to a Serial ATA | |
126 | * FIS structure (Register - Host to Device). | |
127 | * | |
128 | * LOCKING: | |
129 | * Inherited from caller. | |
130 | */ | |
9977126c | 131 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) |
1da177e4 | 132 | { |
9977126c TH |
133 | fis[0] = 0x27; /* Register - Host to Device FIS */ |
134 | fis[1] = pmp & 0xf; /* Port multiplier number*/ | |
135 | if (is_cmd) | |
136 | fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ | |
137 | ||
1da177e4 LT |
138 | fis[2] = tf->command; |
139 | fis[3] = tf->feature; | |
140 | ||
141 | fis[4] = tf->lbal; | |
142 | fis[5] = tf->lbam; | |
143 | fis[6] = tf->lbah; | |
144 | fis[7] = tf->device; | |
145 | ||
146 | fis[8] = tf->hob_lbal; | |
147 | fis[9] = tf->hob_lbam; | |
148 | fis[10] = tf->hob_lbah; | |
149 | fis[11] = tf->hob_feature; | |
150 | ||
151 | fis[12] = tf->nsect; | |
152 | fis[13] = tf->hob_nsect; | |
153 | fis[14] = 0; | |
154 | fis[15] = tf->ctl; | |
155 | ||
156 | fis[16] = 0; | |
157 | fis[17] = 0; | |
158 | fis[18] = 0; | |
159 | fis[19] = 0; | |
160 | } | |
161 | ||
162 | /** | |
163 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
164 | * @fis: Buffer from which data will be input | |
165 | * @tf: Taskfile to output | |
166 | * | |
e12a1be6 | 167 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
168 | * |
169 | * LOCKING: | |
170 | * Inherited from caller. | |
171 | */ | |
172 | ||
057ace5e | 173 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
174 | { |
175 | tf->command = fis[2]; /* status */ | |
176 | tf->feature = fis[3]; /* error */ | |
177 | ||
178 | tf->lbal = fis[4]; | |
179 | tf->lbam = fis[5]; | |
180 | tf->lbah = fis[6]; | |
181 | tf->device = fis[7]; | |
182 | ||
183 | tf->hob_lbal = fis[8]; | |
184 | tf->hob_lbam = fis[9]; | |
185 | tf->hob_lbah = fis[10]; | |
186 | ||
187 | tf->nsect = fis[12]; | |
188 | tf->hob_nsect = fis[13]; | |
189 | } | |
190 | ||
8cbd6df1 AL |
191 | static const u8 ata_rw_cmds[] = { |
192 | /* pio multi */ | |
193 | ATA_CMD_READ_MULTI, | |
194 | ATA_CMD_WRITE_MULTI, | |
195 | ATA_CMD_READ_MULTI_EXT, | |
196 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
197 | 0, |
198 | 0, | |
199 | 0, | |
200 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
201 | /* pio */ |
202 | ATA_CMD_PIO_READ, | |
203 | ATA_CMD_PIO_WRITE, | |
204 | ATA_CMD_PIO_READ_EXT, | |
205 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
206 | 0, |
207 | 0, | |
208 | 0, | |
209 | 0, | |
8cbd6df1 AL |
210 | /* dma */ |
211 | ATA_CMD_READ, | |
212 | ATA_CMD_WRITE, | |
213 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
214 | ATA_CMD_WRITE_EXT, |
215 | 0, | |
216 | 0, | |
217 | 0, | |
218 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 219 | }; |
1da177e4 LT |
220 | |
221 | /** | |
8cbd6df1 | 222 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
bd056d7e TH |
223 | * @tf: command to examine and configure |
224 | * @dev: device tf belongs to | |
1da177e4 | 225 | * |
2e9edbf8 | 226 | * Examine the device configuration and tf->flags to calculate |
8cbd6df1 | 227 | * the proper read/write commands and protocol to use. |
1da177e4 LT |
228 | * |
229 | * LOCKING: | |
230 | * caller. | |
231 | */ | |
bd056d7e | 232 | static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) |
1da177e4 | 233 | { |
9a3dccc4 | 234 | u8 cmd; |
1da177e4 | 235 | |
9a3dccc4 | 236 | int index, fua, lba48, write; |
2e9edbf8 | 237 | |
9a3dccc4 | 238 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
239 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
240 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 241 | |
8cbd6df1 AL |
242 | if (dev->flags & ATA_DFLAG_PIO) { |
243 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 244 | index = dev->multi_count ? 0 : 8; |
9af5c9c9 | 245 | } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { |
8d238e01 AC |
246 | /* Unable to use DMA due to host limitation */ |
247 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 248 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
249 | } else { |
250 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 251 | index = 16; |
8cbd6df1 | 252 | } |
1da177e4 | 253 | |
9a3dccc4 TH |
254 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
255 | if (cmd) { | |
256 | tf->command = cmd; | |
257 | return 0; | |
258 | } | |
259 | return -1; | |
1da177e4 LT |
260 | } |
261 | ||
35b649fe TH |
262 | /** |
263 | * ata_tf_read_block - Read block address from ATA taskfile | |
264 | * @tf: ATA taskfile of interest | |
265 | * @dev: ATA device @tf belongs to | |
266 | * | |
267 | * LOCKING: | |
268 | * None. | |
269 | * | |
270 | * Read block address from @tf. This function can handle all | |
271 | * three address formats - LBA, LBA48 and CHS. tf->protocol and | |
272 | * flags select the address format to use. | |
273 | * | |
274 | * RETURNS: | |
275 | * Block address read from @tf. | |
276 | */ | |
277 | u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) | |
278 | { | |
279 | u64 block = 0; | |
280 | ||
281 | if (tf->flags & ATA_TFLAG_LBA) { | |
282 | if (tf->flags & ATA_TFLAG_LBA48) { | |
283 | block |= (u64)tf->hob_lbah << 40; | |
284 | block |= (u64)tf->hob_lbam << 32; | |
285 | block |= tf->hob_lbal << 24; | |
286 | } else | |
287 | block |= (tf->device & 0xf) << 24; | |
288 | ||
289 | block |= tf->lbah << 16; | |
290 | block |= tf->lbam << 8; | |
291 | block |= tf->lbal; | |
292 | } else { | |
293 | u32 cyl, head, sect; | |
294 | ||
295 | cyl = tf->lbam | (tf->lbah << 8); | |
296 | head = tf->device & 0xf; | |
297 | sect = tf->lbal; | |
298 | ||
299 | block = (cyl * dev->heads + head) * dev->sectors + sect; | |
300 | } | |
301 | ||
302 | return block; | |
303 | } | |
304 | ||
bd056d7e TH |
305 | /** |
306 | * ata_build_rw_tf - Build ATA taskfile for given read/write request | |
307 | * @tf: Target ATA taskfile | |
308 | * @dev: ATA device @tf belongs to | |
309 | * @block: Block address | |
310 | * @n_block: Number of blocks | |
311 | * @tf_flags: RW/FUA etc... | |
312 | * @tag: tag | |
313 | * | |
314 | * LOCKING: | |
315 | * None. | |
316 | * | |
317 | * Build ATA taskfile @tf for read/write request described by | |
318 | * @block, @n_block, @tf_flags and @tag on @dev. | |
319 | * | |
320 | * RETURNS: | |
321 | * | |
322 | * 0 on success, -ERANGE if the request is too large for @dev, | |
323 | * -EINVAL if the request is invalid. | |
324 | */ | |
325 | int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, | |
326 | u64 block, u32 n_block, unsigned int tf_flags, | |
327 | unsigned int tag) | |
328 | { | |
329 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
330 | tf->flags |= tf_flags; | |
331 | ||
6d1245bf | 332 | if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
bd056d7e TH |
333 | /* yay, NCQ */ |
334 | if (!lba_48_ok(block, n_block)) | |
335 | return -ERANGE; | |
336 | ||
337 | tf->protocol = ATA_PROT_NCQ; | |
338 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
339 | ||
340 | if (tf->flags & ATA_TFLAG_WRITE) | |
341 | tf->command = ATA_CMD_FPDMA_WRITE; | |
342 | else | |
343 | tf->command = ATA_CMD_FPDMA_READ; | |
344 | ||
345 | tf->nsect = tag << 3; | |
346 | tf->hob_feature = (n_block >> 8) & 0xff; | |
347 | tf->feature = n_block & 0xff; | |
348 | ||
349 | tf->hob_lbah = (block >> 40) & 0xff; | |
350 | tf->hob_lbam = (block >> 32) & 0xff; | |
351 | tf->hob_lbal = (block >> 24) & 0xff; | |
352 | tf->lbah = (block >> 16) & 0xff; | |
353 | tf->lbam = (block >> 8) & 0xff; | |
354 | tf->lbal = block & 0xff; | |
355 | ||
356 | tf->device = 1 << 6; | |
357 | if (tf->flags & ATA_TFLAG_FUA) | |
358 | tf->device |= 1 << 7; | |
359 | } else if (dev->flags & ATA_DFLAG_LBA) { | |
360 | tf->flags |= ATA_TFLAG_LBA; | |
361 | ||
362 | if (lba_28_ok(block, n_block)) { | |
363 | /* use LBA28 */ | |
364 | tf->device |= (block >> 24) & 0xf; | |
365 | } else if (lba_48_ok(block, n_block)) { | |
366 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
367 | return -ERANGE; | |
368 | ||
369 | /* use LBA48 */ | |
370 | tf->flags |= ATA_TFLAG_LBA48; | |
371 | ||
372 | tf->hob_nsect = (n_block >> 8) & 0xff; | |
373 | ||
374 | tf->hob_lbah = (block >> 40) & 0xff; | |
375 | tf->hob_lbam = (block >> 32) & 0xff; | |
376 | tf->hob_lbal = (block >> 24) & 0xff; | |
377 | } else | |
378 | /* request too large even for LBA48 */ | |
379 | return -ERANGE; | |
380 | ||
381 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
382 | return -EINVAL; | |
383 | ||
384 | tf->nsect = n_block & 0xff; | |
385 | ||
386 | tf->lbah = (block >> 16) & 0xff; | |
387 | tf->lbam = (block >> 8) & 0xff; | |
388 | tf->lbal = block & 0xff; | |
389 | ||
390 | tf->device |= ATA_LBA; | |
391 | } else { | |
392 | /* CHS */ | |
393 | u32 sect, head, cyl, track; | |
394 | ||
395 | /* The request -may- be too large for CHS addressing. */ | |
396 | if (!lba_28_ok(block, n_block)) | |
397 | return -ERANGE; | |
398 | ||
399 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
400 | return -EINVAL; | |
401 | ||
402 | /* Convert LBA to CHS */ | |
403 | track = (u32)block / dev->sectors; | |
404 | cyl = track / dev->heads; | |
405 | head = track % dev->heads; | |
406 | sect = (u32)block % dev->sectors + 1; | |
407 | ||
408 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", | |
409 | (u32)block, track, cyl, head, sect); | |
410 | ||
411 | /* Check whether the converted CHS can fit. | |
412 | Cylinder: 0-65535 | |
413 | Head: 0-15 | |
414 | Sector: 1-255*/ | |
415 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
416 | return -ERANGE; | |
417 | ||
418 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
419 | tf->lbal = sect; | |
420 | tf->lbam = cyl; | |
421 | tf->lbah = cyl >> 8; | |
422 | tf->device |= head; | |
423 | } | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
cb95d562 TH |
428 | /** |
429 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
430 | * @pio_mask: pio_mask | |
431 | * @mwdma_mask: mwdma_mask | |
432 | * @udma_mask: udma_mask | |
433 | * | |
434 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
435 | * unsigned int xfer_mask. | |
436 | * | |
437 | * LOCKING: | |
438 | * None. | |
439 | * | |
440 | * RETURNS: | |
441 | * Packed xfer_mask. | |
442 | */ | |
443 | static unsigned int ata_pack_xfermask(unsigned int pio_mask, | |
444 | unsigned int mwdma_mask, | |
445 | unsigned int udma_mask) | |
446 | { | |
447 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
448 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
449 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
450 | } | |
451 | ||
c0489e4e TH |
452 | /** |
453 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
454 | * @xfer_mask: xfer_mask to unpack | |
455 | * @pio_mask: resulting pio_mask | |
456 | * @mwdma_mask: resulting mwdma_mask | |
457 | * @udma_mask: resulting udma_mask | |
458 | * | |
459 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
460 | * Any NULL distination masks will be ignored. | |
461 | */ | |
462 | static void ata_unpack_xfermask(unsigned int xfer_mask, | |
463 | unsigned int *pio_mask, | |
464 | unsigned int *mwdma_mask, | |
465 | unsigned int *udma_mask) | |
466 | { | |
467 | if (pio_mask) | |
468 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
469 | if (mwdma_mask) | |
470 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
471 | if (udma_mask) | |
472 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
473 | } | |
474 | ||
cb95d562 | 475 | static const struct ata_xfer_ent { |
be9a50c8 | 476 | int shift, bits; |
cb95d562 TH |
477 | u8 base; |
478 | } ata_xfer_tbl[] = { | |
479 | { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, | |
480 | { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, | |
481 | { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, | |
482 | { -1, }, | |
483 | }; | |
484 | ||
485 | /** | |
486 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
487 | * @xfer_mask: xfer_mask of interest | |
488 | * | |
489 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
490 | * bit of @xfer_mask is considered. | |
491 | * | |
492 | * LOCKING: | |
493 | * None. | |
494 | * | |
495 | * RETURNS: | |
496 | * Matching XFER_* value, 0 if no match found. | |
497 | */ | |
498 | static u8 ata_xfer_mask2mode(unsigned int xfer_mask) | |
499 | { | |
500 | int highbit = fls(xfer_mask) - 1; | |
501 | const struct ata_xfer_ent *ent; | |
502 | ||
503 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
504 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
505 | return ent->base + highbit - ent->shift; | |
506 | return 0; | |
507 | } | |
508 | ||
509 | /** | |
510 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
511 | * @xfer_mode: XFER_* of interest | |
512 | * | |
513 | * Return matching xfer_mask for @xfer_mode. | |
514 | * | |
515 | * LOCKING: | |
516 | * None. | |
517 | * | |
518 | * RETURNS: | |
519 | * Matching xfer_mask, 0 if no match found. | |
520 | */ | |
521 | static unsigned int ata_xfer_mode2mask(u8 xfer_mode) | |
522 | { | |
523 | const struct ata_xfer_ent *ent; | |
524 | ||
525 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
526 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
527 | return 1 << (ent->shift + xfer_mode - ent->base); | |
528 | return 0; | |
529 | } | |
530 | ||
531 | /** | |
532 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
533 | * @xfer_mode: XFER_* of interest | |
534 | * | |
535 | * Return matching xfer_shift for @xfer_mode. | |
536 | * | |
537 | * LOCKING: | |
538 | * None. | |
539 | * | |
540 | * RETURNS: | |
541 | * Matching xfer_shift, -1 if no match found. | |
542 | */ | |
543 | static int ata_xfer_mode2shift(unsigned int xfer_mode) | |
544 | { | |
545 | const struct ata_xfer_ent *ent; | |
546 | ||
547 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
548 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
549 | return ent->shift; | |
550 | return -1; | |
551 | } | |
552 | ||
1da177e4 | 553 | /** |
1da7b0d0 TH |
554 | * ata_mode_string - convert xfer_mask to string |
555 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
1da177e4 LT |
556 | * |
557 | * Determine string which represents the highest speed | |
1da7b0d0 | 558 | * (highest bit in @modemask). |
1da177e4 LT |
559 | * |
560 | * LOCKING: | |
561 | * None. | |
562 | * | |
563 | * RETURNS: | |
564 | * Constant C string representing highest speed listed in | |
1da7b0d0 | 565 | * @mode_mask, or the constant C string "<n/a>". |
1da177e4 | 566 | */ |
1da7b0d0 | 567 | static const char *ata_mode_string(unsigned int xfer_mask) |
1da177e4 | 568 | { |
75f554bc TH |
569 | static const char * const xfer_mode_str[] = { |
570 | "PIO0", | |
571 | "PIO1", | |
572 | "PIO2", | |
573 | "PIO3", | |
574 | "PIO4", | |
b352e57d AC |
575 | "PIO5", |
576 | "PIO6", | |
75f554bc TH |
577 | "MWDMA0", |
578 | "MWDMA1", | |
579 | "MWDMA2", | |
b352e57d AC |
580 | "MWDMA3", |
581 | "MWDMA4", | |
75f554bc TH |
582 | "UDMA/16", |
583 | "UDMA/25", | |
584 | "UDMA/33", | |
585 | "UDMA/44", | |
586 | "UDMA/66", | |
587 | "UDMA/100", | |
588 | "UDMA/133", | |
589 | "UDMA7", | |
590 | }; | |
1da7b0d0 | 591 | int highbit; |
1da177e4 | 592 | |
1da7b0d0 TH |
593 | highbit = fls(xfer_mask) - 1; |
594 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
595 | return xfer_mode_str[highbit]; | |
1da177e4 | 596 | return "<n/a>"; |
1da177e4 LT |
597 | } |
598 | ||
4c360c81 TH |
599 | static const char *sata_spd_string(unsigned int spd) |
600 | { | |
601 | static const char * const spd_str[] = { | |
602 | "1.5 Gbps", | |
603 | "3.0 Gbps", | |
604 | }; | |
605 | ||
606 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) | |
607 | return "<unknown>"; | |
608 | return spd_str[spd - 1]; | |
609 | } | |
610 | ||
3373efd8 | 611 | void ata_dev_disable(struct ata_device *dev) |
0b8efb0a | 612 | { |
09d7f9b0 | 613 | if (ata_dev_enabled(dev)) { |
9af5c9c9 | 614 | if (ata_msg_drv(dev->link->ap)) |
09d7f9b0 | 615 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
4ae72a1e TH |
616 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | |
617 | ATA_DNXFER_QUIET); | |
0b8efb0a TH |
618 | dev->class++; |
619 | } | |
620 | } | |
621 | ||
1da177e4 | 622 | /** |
0d5ff566 | 623 | * ata_devchk - PATA device presence detection |
1da177e4 LT |
624 | * @ap: ATA channel to examine |
625 | * @device: Device to examine (starting at zero) | |
626 | * | |
627 | * This technique was originally described in | |
628 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
629 | * later found its way into the ATA/ATAPI spec. | |
630 | * | |
631 | * Write a pattern to the ATA shadow registers, | |
632 | * and if a device is present, it will respond by | |
633 | * correctly storing and echoing back the | |
634 | * ATA shadow register contents. | |
635 | * | |
636 | * LOCKING: | |
637 | * caller. | |
638 | */ | |
639 | ||
0d5ff566 | 640 | static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) |
1da177e4 LT |
641 | { |
642 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
643 | u8 nsect, lbal; | |
644 | ||
645 | ap->ops->dev_select(ap, device); | |
646 | ||
0d5ff566 TH |
647 | iowrite8(0x55, ioaddr->nsect_addr); |
648 | iowrite8(0xaa, ioaddr->lbal_addr); | |
1da177e4 | 649 | |
0d5ff566 TH |
650 | iowrite8(0xaa, ioaddr->nsect_addr); |
651 | iowrite8(0x55, ioaddr->lbal_addr); | |
1da177e4 | 652 | |
0d5ff566 TH |
653 | iowrite8(0x55, ioaddr->nsect_addr); |
654 | iowrite8(0xaa, ioaddr->lbal_addr); | |
1da177e4 | 655 | |
0d5ff566 TH |
656 | nsect = ioread8(ioaddr->nsect_addr); |
657 | lbal = ioread8(ioaddr->lbal_addr); | |
1da177e4 LT |
658 | |
659 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
660 | return 1; /* we found a device */ | |
661 | ||
662 | return 0; /* nothing found */ | |
663 | } | |
664 | ||
1da177e4 LT |
665 | /** |
666 | * ata_dev_classify - determine device type based on ATA-spec signature | |
667 | * @tf: ATA taskfile register set for device to be identified | |
668 | * | |
669 | * Determine from taskfile register contents whether a device is | |
670 | * ATA or ATAPI, as per "Signature and persistence" section | |
671 | * of ATA/PI spec (volume 1, sect 5.14). | |
672 | * | |
673 | * LOCKING: | |
674 | * None. | |
675 | * | |
676 | * RETURNS: | |
633273a3 TH |
677 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or |
678 | * %ATA_DEV_UNKNOWN the event of failure. | |
1da177e4 | 679 | */ |
057ace5e | 680 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
681 | { |
682 | /* Apple's open source Darwin code hints that some devices only | |
683 | * put a proper signature into the LBA mid/high registers, | |
684 | * So, we only check those. It's sufficient for uniqueness. | |
633273a3 TH |
685 | * |
686 | * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate | |
687 | * signatures for ATA and ATAPI devices attached on SerialATA, | |
688 | * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA | |
689 | * spec has never mentioned about using different signatures | |
690 | * for ATA/ATAPI devices. Then, Serial ATA II: Port | |
691 | * Multiplier specification began to use 0x69/0x96 to identify | |
692 | * port multpliers and 0x3c/0xc3 to identify SEMB device. | |
693 | * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and | |
694 | * 0x69/0x96 shortly and described them as reserved for | |
695 | * SerialATA. | |
696 | * | |
697 | * We follow the current spec and consider that 0x69/0x96 | |
698 | * identifies a port multiplier and 0x3c/0xc3 a SEMB device. | |
1da177e4 | 699 | */ |
633273a3 | 700 | if ((tf->lbam == 0) && (tf->lbah == 0)) { |
1da177e4 LT |
701 | DPRINTK("found ATA device by sig\n"); |
702 | return ATA_DEV_ATA; | |
703 | } | |
704 | ||
633273a3 | 705 | if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { |
1da177e4 LT |
706 | DPRINTK("found ATAPI device by sig\n"); |
707 | return ATA_DEV_ATAPI; | |
708 | } | |
709 | ||
633273a3 TH |
710 | if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { |
711 | DPRINTK("found PMP device by sig\n"); | |
712 | return ATA_DEV_PMP; | |
713 | } | |
714 | ||
715 | if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { | |
716 | printk("ata: SEMB device ignored\n"); | |
717 | return ATA_DEV_SEMB_UNSUP; /* not yet */ | |
718 | } | |
719 | ||
1da177e4 LT |
720 | DPRINTK("unknown device\n"); |
721 | return ATA_DEV_UNKNOWN; | |
722 | } | |
723 | ||
724 | /** | |
725 | * ata_dev_try_classify - Parse returned ATA device signature | |
3f19859e TH |
726 | * @dev: ATA device to classify (starting at zero) |
727 | * @present: device seems present | |
b4dc7623 | 728 | * @r_err: Value of error register on completion |
1da177e4 LT |
729 | * |
730 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, | |
731 | * an ATA/ATAPI-defined set of values is placed in the ATA | |
732 | * shadow registers, indicating the results of device detection | |
733 | * and diagnostics. | |
734 | * | |
735 | * Select the ATA device, and read the values from the ATA shadow | |
736 | * registers. Then parse according to the Error register value, | |
737 | * and the spec-defined values examined by ata_dev_classify(). | |
738 | * | |
739 | * LOCKING: | |
740 | * caller. | |
b4dc7623 TH |
741 | * |
742 | * RETURNS: | |
743 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. | |
1da177e4 | 744 | */ |
3f19859e TH |
745 | unsigned int ata_dev_try_classify(struct ata_device *dev, int present, |
746 | u8 *r_err) | |
1da177e4 | 747 | { |
3f19859e | 748 | struct ata_port *ap = dev->link->ap; |
1da177e4 LT |
749 | struct ata_taskfile tf; |
750 | unsigned int class; | |
751 | u8 err; | |
752 | ||
3f19859e | 753 | ap->ops->dev_select(ap, dev->devno); |
1da177e4 LT |
754 | |
755 | memset(&tf, 0, sizeof(tf)); | |
756 | ||
1da177e4 | 757 | ap->ops->tf_read(ap, &tf); |
0169e284 | 758 | err = tf.feature; |
b4dc7623 TH |
759 | if (r_err) |
760 | *r_err = err; | |
1da177e4 | 761 | |
93590859 | 762 | /* see if device passed diags: if master then continue and warn later */ |
3f19859e | 763 | if (err == 0 && dev->devno == 0) |
93590859 | 764 | /* diagnostic fail : do nothing _YET_ */ |
3f19859e | 765 | dev->horkage |= ATA_HORKAGE_DIAGNOSTIC; |
93590859 | 766 | else if (err == 1) |
1da177e4 | 767 | /* do nothing */ ; |
3f19859e | 768 | else if ((dev->devno == 0) && (err == 0x81)) |
1da177e4 LT |
769 | /* do nothing */ ; |
770 | else | |
b4dc7623 | 771 | return ATA_DEV_NONE; |
1da177e4 | 772 | |
b4dc7623 | 773 | /* determine if device is ATA or ATAPI */ |
1da177e4 | 774 | class = ata_dev_classify(&tf); |
b4dc7623 | 775 | |
d7fbee05 TH |
776 | if (class == ATA_DEV_UNKNOWN) { |
777 | /* If the device failed diagnostic, it's likely to | |
778 | * have reported incorrect device signature too. | |
779 | * Assume ATA device if the device seems present but | |
780 | * device signature is invalid with diagnostic | |
781 | * failure. | |
782 | */ | |
783 | if (present && (dev->horkage & ATA_HORKAGE_DIAGNOSTIC)) | |
784 | class = ATA_DEV_ATA; | |
785 | else | |
786 | class = ATA_DEV_NONE; | |
787 | } else if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) | |
788 | class = ATA_DEV_NONE; | |
789 | ||
b4dc7623 | 790 | return class; |
1da177e4 LT |
791 | } |
792 | ||
793 | /** | |
6a62a04d | 794 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
795 | * @id: IDENTIFY DEVICE results we will examine |
796 | * @s: string into which data is output | |
797 | * @ofs: offset into identify device page | |
798 | * @len: length of string to return. must be an even number. | |
799 | * | |
800 | * The strings in the IDENTIFY DEVICE page are broken up into | |
801 | * 16-bit chunks. Run through the string, and output each | |
802 | * 8-bit chunk linearly, regardless of platform. | |
803 | * | |
804 | * LOCKING: | |
805 | * caller. | |
806 | */ | |
807 | ||
6a62a04d TH |
808 | void ata_id_string(const u16 *id, unsigned char *s, |
809 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
810 | { |
811 | unsigned int c; | |
812 | ||
813 | while (len > 0) { | |
814 | c = id[ofs] >> 8; | |
815 | *s = c; | |
816 | s++; | |
817 | ||
818 | c = id[ofs] & 0xff; | |
819 | *s = c; | |
820 | s++; | |
821 | ||
822 | ofs++; | |
823 | len -= 2; | |
824 | } | |
825 | } | |
826 | ||
0e949ff3 | 827 | /** |
6a62a04d | 828 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
829 | * @id: IDENTIFY DEVICE results we will examine |
830 | * @s: string into which data is output | |
831 | * @ofs: offset into identify device page | |
832 | * @len: length of string to return. must be an odd number. | |
833 | * | |
6a62a04d | 834 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
835 | * trims trailing spaces and terminates the resulting string with |
836 | * null. @len must be actual maximum length (even number) + 1. | |
837 | * | |
838 | * LOCKING: | |
839 | * caller. | |
840 | */ | |
6a62a04d TH |
841 | void ata_id_c_string(const u16 *id, unsigned char *s, |
842 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
843 | { |
844 | unsigned char *p; | |
845 | ||
846 | WARN_ON(!(len & 1)); | |
847 | ||
6a62a04d | 848 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
849 | |
850 | p = s + strnlen(s, len - 1); | |
851 | while (p > s && p[-1] == ' ') | |
852 | p--; | |
853 | *p = '\0'; | |
854 | } | |
0baab86b | 855 | |
db6f8759 TH |
856 | static u64 ata_id_n_sectors(const u16 *id) |
857 | { | |
858 | if (ata_id_has_lba(id)) { | |
859 | if (ata_id_has_lba48(id)) | |
860 | return ata_id_u64(id, 100); | |
861 | else | |
862 | return ata_id_u32(id, 60); | |
863 | } else { | |
864 | if (ata_id_current_chs_valid(id)) | |
865 | return ata_id_u32(id, 57); | |
866 | else | |
867 | return id[1] * id[3] * id[6]; | |
868 | } | |
869 | } | |
870 | ||
1e999736 AC |
871 | static u64 ata_tf_to_lba48(struct ata_taskfile *tf) |
872 | { | |
873 | u64 sectors = 0; | |
874 | ||
875 | sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; | |
876 | sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; | |
877 | sectors |= (tf->hob_lbal & 0xff) << 24; | |
878 | sectors |= (tf->lbah & 0xff) << 16; | |
879 | sectors |= (tf->lbam & 0xff) << 8; | |
880 | sectors |= (tf->lbal & 0xff); | |
881 | ||
882 | return ++sectors; | |
883 | } | |
884 | ||
885 | static u64 ata_tf_to_lba(struct ata_taskfile *tf) | |
886 | { | |
887 | u64 sectors = 0; | |
888 | ||
889 | sectors |= (tf->device & 0x0f) << 24; | |
890 | sectors |= (tf->lbah & 0xff) << 16; | |
891 | sectors |= (tf->lbam & 0xff) << 8; | |
892 | sectors |= (tf->lbal & 0xff); | |
893 | ||
894 | return ++sectors; | |
895 | } | |
896 | ||
897 | /** | |
c728a914 TH |
898 | * ata_read_native_max_address - Read native max address |
899 | * @dev: target device | |
900 | * @max_sectors: out parameter for the result native max address | |
1e999736 | 901 | * |
c728a914 TH |
902 | * Perform an LBA48 or LBA28 native size query upon the device in |
903 | * question. | |
1e999736 | 904 | * |
c728a914 TH |
905 | * RETURNS: |
906 | * 0 on success, -EACCES if command is aborted by the drive. | |
907 | * -EIO on other errors. | |
1e999736 | 908 | */ |
c728a914 | 909 | static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) |
1e999736 | 910 | { |
c728a914 | 911 | unsigned int err_mask; |
1e999736 | 912 | struct ata_taskfile tf; |
c728a914 | 913 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
914 | |
915 | ata_tf_init(dev, &tf); | |
916 | ||
c728a914 | 917 | /* always clear all address registers */ |
1e999736 | 918 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1e999736 | 919 | |
c728a914 TH |
920 | if (lba48) { |
921 | tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; | |
922 | tf.flags |= ATA_TFLAG_LBA48; | |
923 | } else | |
924 | tf.command = ATA_CMD_READ_NATIVE_MAX; | |
1e999736 | 925 | |
1e999736 | 926 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 TH |
927 | tf.device |= ATA_LBA; |
928 | ||
929 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
930 | if (err_mask) { | |
931 | ata_dev_printk(dev, KERN_WARNING, "failed to read native " | |
932 | "max address (err_mask=0x%x)\n", err_mask); | |
933 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
934 | return -EACCES; | |
935 | return -EIO; | |
936 | } | |
1e999736 | 937 | |
c728a914 TH |
938 | if (lba48) |
939 | *max_sectors = ata_tf_to_lba48(&tf); | |
940 | else | |
941 | *max_sectors = ata_tf_to_lba(&tf); | |
93328e11 AC |
942 | if (dev->horkage & ATA_HORKAGE_HPA_SIZE) |
943 | (*max_sectors)--; | |
c728a914 | 944 | return 0; |
1e999736 AC |
945 | } |
946 | ||
947 | /** | |
c728a914 TH |
948 | * ata_set_max_sectors - Set max sectors |
949 | * @dev: target device | |
6b38d1d1 | 950 | * @new_sectors: new max sectors value to set for the device |
1e999736 | 951 | * |
c728a914 TH |
952 | * Set max sectors of @dev to @new_sectors. |
953 | * | |
954 | * RETURNS: | |
955 | * 0 on success, -EACCES if command is aborted or denied (due to | |
956 | * previous non-volatile SET_MAX) by the drive. -EIO on other | |
957 | * errors. | |
1e999736 | 958 | */ |
05027adc | 959 | static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) |
1e999736 | 960 | { |
c728a914 | 961 | unsigned int err_mask; |
1e999736 | 962 | struct ata_taskfile tf; |
c728a914 | 963 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
964 | |
965 | new_sectors--; | |
966 | ||
967 | ata_tf_init(dev, &tf); | |
968 | ||
1e999736 | 969 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
c728a914 TH |
970 | |
971 | if (lba48) { | |
972 | tf.command = ATA_CMD_SET_MAX_EXT; | |
973 | tf.flags |= ATA_TFLAG_LBA48; | |
974 | ||
975 | tf.hob_lbal = (new_sectors >> 24) & 0xff; | |
976 | tf.hob_lbam = (new_sectors >> 32) & 0xff; | |
977 | tf.hob_lbah = (new_sectors >> 40) & 0xff; | |
1e582ba4 | 978 | } else { |
c728a914 TH |
979 | tf.command = ATA_CMD_SET_MAX; |
980 | ||
1e582ba4 TH |
981 | tf.device |= (new_sectors >> 24) & 0xf; |
982 | } | |
983 | ||
1e999736 | 984 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 | 985 | tf.device |= ATA_LBA; |
1e999736 AC |
986 | |
987 | tf.lbal = (new_sectors >> 0) & 0xff; | |
988 | tf.lbam = (new_sectors >> 8) & 0xff; | |
989 | tf.lbah = (new_sectors >> 16) & 0xff; | |
1e999736 | 990 | |
c728a914 TH |
991 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
992 | if (err_mask) { | |
993 | ata_dev_printk(dev, KERN_WARNING, "failed to set " | |
994 | "max address (err_mask=0x%x)\n", err_mask); | |
995 | if (err_mask == AC_ERR_DEV && | |
996 | (tf.feature & (ATA_ABORTED | ATA_IDNF))) | |
997 | return -EACCES; | |
998 | return -EIO; | |
999 | } | |
1000 | ||
c728a914 | 1001 | return 0; |
1e999736 AC |
1002 | } |
1003 | ||
1004 | /** | |
1005 | * ata_hpa_resize - Resize a device with an HPA set | |
1006 | * @dev: Device to resize | |
1007 | * | |
1008 | * Read the size of an LBA28 or LBA48 disk with HPA features and resize | |
1009 | * it if required to the full size of the media. The caller must check | |
1010 | * the drive has the HPA feature set enabled. | |
05027adc TH |
1011 | * |
1012 | * RETURNS: | |
1013 | * 0 on success, -errno on failure. | |
1e999736 | 1014 | */ |
05027adc | 1015 | static int ata_hpa_resize(struct ata_device *dev) |
1e999736 | 1016 | { |
05027adc TH |
1017 | struct ata_eh_context *ehc = &dev->link->eh_context; |
1018 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; | |
1019 | u64 sectors = ata_id_n_sectors(dev->id); | |
1020 | u64 native_sectors; | |
c728a914 | 1021 | int rc; |
a617c09f | 1022 | |
05027adc TH |
1023 | /* do we need to do it? */ |
1024 | if (dev->class != ATA_DEV_ATA || | |
1025 | !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || | |
1026 | (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) | |
c728a914 | 1027 | return 0; |
1e999736 | 1028 | |
05027adc TH |
1029 | /* read native max address */ |
1030 | rc = ata_read_native_max_address(dev, &native_sectors); | |
1031 | if (rc) { | |
1032 | /* If HPA isn't going to be unlocked, skip HPA | |
1033 | * resizing from the next try. | |
1034 | */ | |
1035 | if (!ata_ignore_hpa) { | |
1036 | ata_dev_printk(dev, KERN_WARNING, "HPA support seems " | |
1037 | "broken, will skip HPA handling\n"); | |
1038 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; | |
1039 | ||
1040 | /* we can continue if device aborted the command */ | |
1041 | if (rc == -EACCES) | |
1042 | rc = 0; | |
1e999736 | 1043 | } |
37301a55 | 1044 | |
05027adc TH |
1045 | return rc; |
1046 | } | |
1047 | ||
1048 | /* nothing to do? */ | |
1049 | if (native_sectors <= sectors || !ata_ignore_hpa) { | |
1050 | if (!print_info || native_sectors == sectors) | |
1051 | return 0; | |
1052 | ||
1053 | if (native_sectors > sectors) | |
1054 | ata_dev_printk(dev, KERN_INFO, | |
1055 | "HPA detected: current %llu, native %llu\n", | |
1056 | (unsigned long long)sectors, | |
1057 | (unsigned long long)native_sectors); | |
1058 | else if (native_sectors < sectors) | |
1059 | ata_dev_printk(dev, KERN_WARNING, | |
1060 | "native sectors (%llu) is smaller than " | |
1061 | "sectors (%llu)\n", | |
1062 | (unsigned long long)native_sectors, | |
1063 | (unsigned long long)sectors); | |
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | /* let's unlock HPA */ | |
1068 | rc = ata_set_max_sectors(dev, native_sectors); | |
1069 | if (rc == -EACCES) { | |
1070 | /* if device aborted the command, skip HPA resizing */ | |
1071 | ata_dev_printk(dev, KERN_WARNING, "device aborted resize " | |
1072 | "(%llu -> %llu), skipping HPA handling\n", | |
1073 | (unsigned long long)sectors, | |
1074 | (unsigned long long)native_sectors); | |
1075 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; | |
1076 | return 0; | |
1077 | } else if (rc) | |
1078 | return rc; | |
1079 | ||
1080 | /* re-read IDENTIFY data */ | |
1081 | rc = ata_dev_reread_id(dev, 0); | |
1082 | if (rc) { | |
1083 | ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY " | |
1084 | "data after HPA resizing\n"); | |
1085 | return rc; | |
1086 | } | |
1087 | ||
1088 | if (print_info) { | |
1089 | u64 new_sectors = ata_id_n_sectors(dev->id); | |
1090 | ata_dev_printk(dev, KERN_INFO, | |
1091 | "HPA unlocked: %llu -> %llu, native %llu\n", | |
1092 | (unsigned long long)sectors, | |
1093 | (unsigned long long)new_sectors, | |
1094 | (unsigned long long)native_sectors); | |
1095 | } | |
1096 | ||
1097 | return 0; | |
1e999736 AC |
1098 | } |
1099 | ||
10305f0f A |
1100 | /** |
1101 | * ata_id_to_dma_mode - Identify DMA mode from id block | |
1102 | * @dev: device to identify | |
cc261267 | 1103 | * @unknown: mode to assume if we cannot tell |
10305f0f A |
1104 | * |
1105 | * Set up the timing values for the device based upon the identify | |
1106 | * reported values for the DMA mode. This function is used by drivers | |
1107 | * which rely upon firmware configured modes, but wish to report the | |
1108 | * mode correctly when possible. | |
1109 | * | |
1110 | * In addition we emit similarly formatted messages to the default | |
1111 | * ata_dev_set_mode handler, in order to provide consistency of | |
1112 | * presentation. | |
1113 | */ | |
1114 | ||
1115 | void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown) | |
1116 | { | |
1117 | unsigned int mask; | |
1118 | u8 mode; | |
1119 | ||
1120 | /* Pack the DMA modes */ | |
1121 | mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA; | |
1122 | if (dev->id[53] & 0x04) | |
1123 | mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA; | |
1124 | ||
1125 | /* Select the mode in use */ | |
1126 | mode = ata_xfer_mask2mode(mask); | |
1127 | ||
1128 | if (mode != 0) { | |
1129 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", | |
1130 | ata_mode_string(mask)); | |
1131 | } else { | |
1132 | /* SWDMA perhaps ? */ | |
1133 | mode = unknown; | |
1134 | ata_dev_printk(dev, KERN_INFO, "configured for DMA\n"); | |
1135 | } | |
1136 | ||
1137 | /* Configure the device reporting */ | |
1138 | dev->xfer_mode = mode; | |
1139 | dev->xfer_shift = ata_xfer_mode2shift(mode); | |
1140 | } | |
1141 | ||
0baab86b EF |
1142 | /** |
1143 | * ata_noop_dev_select - Select device 0/1 on ATA bus | |
1144 | * @ap: ATA channel to manipulate | |
1145 | * @device: ATA device (numbered from zero) to select | |
1146 | * | |
1147 | * This function performs no actual function. | |
1148 | * | |
1149 | * May be used as the dev_select() entry in ata_port_operations. | |
1150 | * | |
1151 | * LOCKING: | |
1152 | * caller. | |
1153 | */ | |
1da177e4 LT |
1154 | void ata_noop_dev_select (struct ata_port *ap, unsigned int device) |
1155 | { | |
1156 | } | |
1157 | ||
0baab86b | 1158 | |
1da177e4 LT |
1159 | /** |
1160 | * ata_std_dev_select - Select device 0/1 on ATA bus | |
1161 | * @ap: ATA channel to manipulate | |
1162 | * @device: ATA device (numbered from zero) to select | |
1163 | * | |
1164 | * Use the method defined in the ATA specification to | |
1165 | * make either device 0, or device 1, active on the | |
0baab86b EF |
1166 | * ATA channel. Works with both PIO and MMIO. |
1167 | * | |
1168 | * May be used as the dev_select() entry in ata_port_operations. | |
1da177e4 LT |
1169 | * |
1170 | * LOCKING: | |
1171 | * caller. | |
1172 | */ | |
1173 | ||
1174 | void ata_std_dev_select (struct ata_port *ap, unsigned int device) | |
1175 | { | |
1176 | u8 tmp; | |
1177 | ||
1178 | if (device == 0) | |
1179 | tmp = ATA_DEVICE_OBS; | |
1180 | else | |
1181 | tmp = ATA_DEVICE_OBS | ATA_DEV1; | |
1182 | ||
0d5ff566 | 1183 | iowrite8(tmp, ap->ioaddr.device_addr); |
1da177e4 LT |
1184 | ata_pause(ap); /* needed; also flushes, for mmio */ |
1185 | } | |
1186 | ||
1187 | /** | |
1188 | * ata_dev_select - Select device 0/1 on ATA bus | |
1189 | * @ap: ATA channel to manipulate | |
1190 | * @device: ATA device (numbered from zero) to select | |
1191 | * @wait: non-zero to wait for Status register BSY bit to clear | |
1192 | * @can_sleep: non-zero if context allows sleeping | |
1193 | * | |
1194 | * Use the method defined in the ATA specification to | |
1195 | * make either device 0, or device 1, active on the | |
1196 | * ATA channel. | |
1197 | * | |
1198 | * This is a high-level version of ata_std_dev_select(), | |
1199 | * which additionally provides the services of inserting | |
1200 | * the proper pauses and status polling, where needed. | |
1201 | * | |
1202 | * LOCKING: | |
1203 | * caller. | |
1204 | */ | |
1205 | ||
1206 | void ata_dev_select(struct ata_port *ap, unsigned int device, | |
1207 | unsigned int wait, unsigned int can_sleep) | |
1208 | { | |
88574551 | 1209 | if (ata_msg_probe(ap)) |
44877b4e TH |
1210 | ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " |
1211 | "device %u, wait %u\n", device, wait); | |
1da177e4 LT |
1212 | |
1213 | if (wait) | |
1214 | ata_wait_idle(ap); | |
1215 | ||
1216 | ap->ops->dev_select(ap, device); | |
1217 | ||
1218 | if (wait) { | |
9af5c9c9 | 1219 | if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI) |
1da177e4 LT |
1220 | msleep(150); |
1221 | ata_wait_idle(ap); | |
1222 | } | |
1223 | } | |
1224 | ||
1225 | /** | |
1226 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 1227 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 1228 | * |
0bd3300a TH |
1229 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
1230 | * page. | |
1da177e4 LT |
1231 | * |
1232 | * LOCKING: | |
1233 | * caller. | |
1234 | */ | |
1235 | ||
0bd3300a | 1236 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
1237 | { |
1238 | DPRINTK("49==0x%04x " | |
1239 | "53==0x%04x " | |
1240 | "63==0x%04x " | |
1241 | "64==0x%04x " | |
1242 | "75==0x%04x \n", | |
0bd3300a TH |
1243 | id[49], |
1244 | id[53], | |
1245 | id[63], | |
1246 | id[64], | |
1247 | id[75]); | |
1da177e4 LT |
1248 | DPRINTK("80==0x%04x " |
1249 | "81==0x%04x " | |
1250 | "82==0x%04x " | |
1251 | "83==0x%04x " | |
1252 | "84==0x%04x \n", | |
0bd3300a TH |
1253 | id[80], |
1254 | id[81], | |
1255 | id[82], | |
1256 | id[83], | |
1257 | id[84]); | |
1da177e4 LT |
1258 | DPRINTK("88==0x%04x " |
1259 | "93==0x%04x\n", | |
0bd3300a TH |
1260 | id[88], |
1261 | id[93]); | |
1da177e4 LT |
1262 | } |
1263 | ||
cb95d562 TH |
1264 | /** |
1265 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
1266 | * @id: IDENTIFY data to compute xfer mask from | |
1267 | * | |
1268 | * Compute the xfermask for this device. This is not as trivial | |
1269 | * as it seems if we must consider early devices correctly. | |
1270 | * | |
1271 | * FIXME: pre IDE drive timing (do we care ?). | |
1272 | * | |
1273 | * LOCKING: | |
1274 | * None. | |
1275 | * | |
1276 | * RETURNS: | |
1277 | * Computed xfermask | |
1278 | */ | |
1279 | static unsigned int ata_id_xfermask(const u16 *id) | |
1280 | { | |
1281 | unsigned int pio_mask, mwdma_mask, udma_mask; | |
1282 | ||
1283 | /* Usual case. Word 53 indicates word 64 is valid */ | |
1284 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
1285 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
1286 | pio_mask <<= 3; | |
1287 | pio_mask |= 0x7; | |
1288 | } else { | |
1289 | /* If word 64 isn't valid then Word 51 high byte holds | |
1290 | * the PIO timing number for the maximum. Turn it into | |
1291 | * a mask. | |
1292 | */ | |
7a0f1c8a | 1293 | u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
46767aeb AC |
1294 | if (mode < 5) /* Valid PIO range */ |
1295 | pio_mask = (2 << mode) - 1; | |
1296 | else | |
1297 | pio_mask = 1; | |
cb95d562 TH |
1298 | |
1299 | /* But wait.. there's more. Design your standards by | |
1300 | * committee and you too can get a free iordy field to | |
1301 | * process. However its the speeds not the modes that | |
1302 | * are supported... Note drivers using the timing API | |
1303 | * will get this right anyway | |
1304 | */ | |
1305 | } | |
1306 | ||
1307 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
fb21f0d0 | 1308 | |
b352e57d AC |
1309 | if (ata_id_is_cfa(id)) { |
1310 | /* | |
1311 | * Process compact flash extended modes | |
1312 | */ | |
1313 | int pio = id[163] & 0x7; | |
1314 | int dma = (id[163] >> 3) & 7; | |
1315 | ||
1316 | if (pio) | |
1317 | pio_mask |= (1 << 5); | |
1318 | if (pio > 1) | |
1319 | pio_mask |= (1 << 6); | |
1320 | if (dma) | |
1321 | mwdma_mask |= (1 << 3); | |
1322 | if (dma > 1) | |
1323 | mwdma_mask |= (1 << 4); | |
1324 | } | |
1325 | ||
fb21f0d0 TH |
1326 | udma_mask = 0; |
1327 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
1328 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
cb95d562 TH |
1329 | |
1330 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
1331 | } | |
1332 | ||
86e45b6b TH |
1333 | /** |
1334 | * ata_port_queue_task - Queue port_task | |
1335 | * @ap: The ata_port to queue port_task for | |
e2a7f77a | 1336 | * @fn: workqueue function to be scheduled |
65f27f38 | 1337 | * @data: data for @fn to use |
e2a7f77a | 1338 | * @delay: delay time for workqueue function |
86e45b6b TH |
1339 | * |
1340 | * Schedule @fn(@data) for execution after @delay jiffies using | |
1341 | * port_task. There is one port_task per port and it's the | |
1342 | * user(low level driver)'s responsibility to make sure that only | |
1343 | * one task is active at any given time. | |
1344 | * | |
1345 | * libata core layer takes care of synchronization between | |
1346 | * port_task and EH. ata_port_queue_task() may be ignored for EH | |
1347 | * synchronization. | |
1348 | * | |
1349 | * LOCKING: | |
1350 | * Inherited from caller. | |
1351 | */ | |
65f27f38 | 1352 | void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data, |
86e45b6b TH |
1353 | unsigned long delay) |
1354 | { | |
65f27f38 DH |
1355 | PREPARE_DELAYED_WORK(&ap->port_task, fn); |
1356 | ap->port_task_data = data; | |
86e45b6b | 1357 | |
45a66c1c ON |
1358 | /* may fail if ata_port_flush_task() in progress */ |
1359 | queue_delayed_work(ata_wq, &ap->port_task, delay); | |
86e45b6b TH |
1360 | } |
1361 | ||
1362 | /** | |
1363 | * ata_port_flush_task - Flush port_task | |
1364 | * @ap: The ata_port to flush port_task for | |
1365 | * | |
1366 | * After this function completes, port_task is guranteed not to | |
1367 | * be running or scheduled. | |
1368 | * | |
1369 | * LOCKING: | |
1370 | * Kernel thread context (may sleep) | |
1371 | */ | |
1372 | void ata_port_flush_task(struct ata_port *ap) | |
1373 | { | |
86e45b6b TH |
1374 | DPRINTK("ENTER\n"); |
1375 | ||
45a66c1c | 1376 | cancel_rearming_delayed_work(&ap->port_task); |
86e45b6b | 1377 | |
0dd4b21f BP |
1378 | if (ata_msg_ctl(ap)) |
1379 | ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); | |
86e45b6b TH |
1380 | } |
1381 | ||
7102d230 | 1382 | static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 1383 | { |
77853bf2 | 1384 | struct completion *waiting = qc->private_data; |
a2a7a662 | 1385 | |
a2a7a662 | 1386 | complete(waiting); |
a2a7a662 TH |
1387 | } |
1388 | ||
1389 | /** | |
2432697b | 1390 | * ata_exec_internal_sg - execute libata internal command |
a2a7a662 TH |
1391 | * @dev: Device to which the command is sent |
1392 | * @tf: Taskfile registers for the command and the result | |
d69cf37d | 1393 | * @cdb: CDB for packet command |
a2a7a662 | 1394 | * @dma_dir: Data tranfer direction of the command |
2432697b TH |
1395 | * @sg: sg list for the data buffer of the command |
1396 | * @n_elem: Number of sg entries | |
a2a7a662 TH |
1397 | * |
1398 | * Executes libata internal command with timeout. @tf contains | |
1399 | * command on entry and result on return. Timeout and error | |
1400 | * conditions are reported via return value. No recovery action | |
1401 | * is taken after a command times out. It's caller's duty to | |
1402 | * clean up after timeout. | |
1403 | * | |
1404 | * LOCKING: | |
1405 | * None. Should be called with kernel context, might sleep. | |
551e8889 TH |
1406 | * |
1407 | * RETURNS: | |
1408 | * Zero on success, AC_ERR_* mask on failure | |
a2a7a662 | 1409 | */ |
2432697b TH |
1410 | unsigned ata_exec_internal_sg(struct ata_device *dev, |
1411 | struct ata_taskfile *tf, const u8 *cdb, | |
1412 | int dma_dir, struct scatterlist *sg, | |
1413 | unsigned int n_elem) | |
a2a7a662 | 1414 | { |
9af5c9c9 TH |
1415 | struct ata_link *link = dev->link; |
1416 | struct ata_port *ap = link->ap; | |
a2a7a662 TH |
1417 | u8 command = tf->command; |
1418 | struct ata_queued_cmd *qc; | |
2ab7db1f | 1419 | unsigned int tag, preempted_tag; |
dedaf2b0 | 1420 | u32 preempted_sactive, preempted_qc_active; |
da917d69 | 1421 | int preempted_nr_active_links; |
60be6b9a | 1422 | DECLARE_COMPLETION_ONSTACK(wait); |
a2a7a662 | 1423 | unsigned long flags; |
77853bf2 | 1424 | unsigned int err_mask; |
d95a717f | 1425 | int rc; |
a2a7a662 | 1426 | |
ba6a1308 | 1427 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 | 1428 | |
e3180499 | 1429 | /* no internal command while frozen */ |
b51e9e5d | 1430 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
ba6a1308 | 1431 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1432 | return AC_ERR_SYSTEM; |
1433 | } | |
1434 | ||
2ab7db1f | 1435 | /* initialize internal qc */ |
a2a7a662 | 1436 | |
2ab7db1f TH |
1437 | /* XXX: Tag 0 is used for drivers with legacy EH as some |
1438 | * drivers choke if any other tag is given. This breaks | |
1439 | * ata_tag_internal() test for those drivers. Don't use new | |
1440 | * EH stuff without converting to it. | |
1441 | */ | |
1442 | if (ap->ops->error_handler) | |
1443 | tag = ATA_TAG_INTERNAL; | |
1444 | else | |
1445 | tag = 0; | |
1446 | ||
6cec4a39 | 1447 | if (test_and_set_bit(tag, &ap->qc_allocated)) |
2ab7db1f | 1448 | BUG(); |
f69499f4 | 1449 | qc = __ata_qc_from_tag(ap, tag); |
2ab7db1f TH |
1450 | |
1451 | qc->tag = tag; | |
1452 | qc->scsicmd = NULL; | |
1453 | qc->ap = ap; | |
1454 | qc->dev = dev; | |
1455 | ata_qc_reinit(qc); | |
1456 | ||
9af5c9c9 TH |
1457 | preempted_tag = link->active_tag; |
1458 | preempted_sactive = link->sactive; | |
dedaf2b0 | 1459 | preempted_qc_active = ap->qc_active; |
da917d69 | 1460 | preempted_nr_active_links = ap->nr_active_links; |
9af5c9c9 TH |
1461 | link->active_tag = ATA_TAG_POISON; |
1462 | link->sactive = 0; | |
dedaf2b0 | 1463 | ap->qc_active = 0; |
da917d69 | 1464 | ap->nr_active_links = 0; |
2ab7db1f TH |
1465 | |
1466 | /* prepare & issue qc */ | |
a2a7a662 | 1467 | qc->tf = *tf; |
d69cf37d TH |
1468 | if (cdb) |
1469 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); | |
e61e0672 | 1470 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
a2a7a662 TH |
1471 | qc->dma_dir = dma_dir; |
1472 | if (dma_dir != DMA_NONE) { | |
2432697b TH |
1473 | unsigned int i, buflen = 0; |
1474 | ||
1475 | for (i = 0; i < n_elem; i++) | |
1476 | buflen += sg[i].length; | |
1477 | ||
1478 | ata_sg_init(qc, sg, n_elem); | |
49c80429 | 1479 | qc->nbytes = buflen; |
a2a7a662 TH |
1480 | } |
1481 | ||
77853bf2 | 1482 | qc->private_data = &wait; |
a2a7a662 TH |
1483 | qc->complete_fn = ata_qc_complete_internal; |
1484 | ||
8e0e694a | 1485 | ata_qc_issue(qc); |
a2a7a662 | 1486 | |
ba6a1308 | 1487 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 | 1488 | |
a8601e5f | 1489 | rc = wait_for_completion_timeout(&wait, ata_probe_timeout); |
d95a717f TH |
1490 | |
1491 | ata_port_flush_task(ap); | |
41ade50c | 1492 | |
d95a717f | 1493 | if (!rc) { |
ba6a1308 | 1494 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 TH |
1495 | |
1496 | /* We're racing with irq here. If we lose, the | |
1497 | * following test prevents us from completing the qc | |
d95a717f TH |
1498 | * twice. If we win, the port is frozen and will be |
1499 | * cleaned up by ->post_internal_cmd(). | |
a2a7a662 | 1500 | */ |
77853bf2 | 1501 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
d95a717f TH |
1502 | qc->err_mask |= AC_ERR_TIMEOUT; |
1503 | ||
1504 | if (ap->ops->error_handler) | |
1505 | ata_port_freeze(ap); | |
1506 | else | |
1507 | ata_qc_complete(qc); | |
f15a1daf | 1508 | |
0dd4b21f BP |
1509 | if (ata_msg_warn(ap)) |
1510 | ata_dev_printk(dev, KERN_WARNING, | |
88574551 | 1511 | "qc timeout (cmd 0x%x)\n", command); |
a2a7a662 TH |
1512 | } |
1513 | ||
ba6a1308 | 1514 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 TH |
1515 | } |
1516 | ||
d95a717f TH |
1517 | /* do post_internal_cmd */ |
1518 | if (ap->ops->post_internal_cmd) | |
1519 | ap->ops->post_internal_cmd(qc); | |
1520 | ||
a51d644a TH |
1521 | /* perform minimal error analysis */ |
1522 | if (qc->flags & ATA_QCFLAG_FAILED) { | |
1523 | if (qc->result_tf.command & (ATA_ERR | ATA_DF)) | |
1524 | qc->err_mask |= AC_ERR_DEV; | |
1525 | ||
1526 | if (!qc->err_mask) | |
1527 | qc->err_mask |= AC_ERR_OTHER; | |
1528 | ||
1529 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1530 | qc->err_mask &= ~AC_ERR_OTHER; | |
d95a717f TH |
1531 | } |
1532 | ||
15869303 | 1533 | /* finish up */ |
ba6a1308 | 1534 | spin_lock_irqsave(ap->lock, flags); |
15869303 | 1535 | |
e61e0672 | 1536 | *tf = qc->result_tf; |
77853bf2 TH |
1537 | err_mask = qc->err_mask; |
1538 | ||
1539 | ata_qc_free(qc); | |
9af5c9c9 TH |
1540 | link->active_tag = preempted_tag; |
1541 | link->sactive = preempted_sactive; | |
dedaf2b0 | 1542 | ap->qc_active = preempted_qc_active; |
da917d69 | 1543 | ap->nr_active_links = preempted_nr_active_links; |
77853bf2 | 1544 | |
1f7dd3e9 TH |
1545 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
1546 | * Until those drivers are fixed, we detect the condition | |
1547 | * here, fail the command with AC_ERR_SYSTEM and reenable the | |
1548 | * port. | |
1549 | * | |
1550 | * Note that this doesn't change any behavior as internal | |
1551 | * command failure results in disabling the device in the | |
1552 | * higher layer for LLDDs without new reset/EH callbacks. | |
1553 | * | |
1554 | * Kill the following code as soon as those drivers are fixed. | |
1555 | */ | |
198e0fed | 1556 | if (ap->flags & ATA_FLAG_DISABLED) { |
1f7dd3e9 TH |
1557 | err_mask |= AC_ERR_SYSTEM; |
1558 | ata_port_probe(ap); | |
1559 | } | |
1560 | ||
ba6a1308 | 1561 | spin_unlock_irqrestore(ap->lock, flags); |
15869303 | 1562 | |
77853bf2 | 1563 | return err_mask; |
a2a7a662 TH |
1564 | } |
1565 | ||
2432697b | 1566 | /** |
33480a0e | 1567 | * ata_exec_internal - execute libata internal command |
2432697b TH |
1568 | * @dev: Device to which the command is sent |
1569 | * @tf: Taskfile registers for the command and the result | |
1570 | * @cdb: CDB for packet command | |
1571 | * @dma_dir: Data tranfer direction of the command | |
1572 | * @buf: Data buffer of the command | |
1573 | * @buflen: Length of data buffer | |
1574 | * | |
1575 | * Wrapper around ata_exec_internal_sg() which takes simple | |
1576 | * buffer instead of sg list. | |
1577 | * | |
1578 | * LOCKING: | |
1579 | * None. Should be called with kernel context, might sleep. | |
1580 | * | |
1581 | * RETURNS: | |
1582 | * Zero on success, AC_ERR_* mask on failure | |
1583 | */ | |
1584 | unsigned ata_exec_internal(struct ata_device *dev, | |
1585 | struct ata_taskfile *tf, const u8 *cdb, | |
1586 | int dma_dir, void *buf, unsigned int buflen) | |
1587 | { | |
33480a0e TH |
1588 | struct scatterlist *psg = NULL, sg; |
1589 | unsigned int n_elem = 0; | |
2432697b | 1590 | |
33480a0e TH |
1591 | if (dma_dir != DMA_NONE) { |
1592 | WARN_ON(!buf); | |
1593 | sg_init_one(&sg, buf, buflen); | |
1594 | psg = &sg; | |
1595 | n_elem++; | |
1596 | } | |
2432697b | 1597 | |
33480a0e | 1598 | return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem); |
2432697b TH |
1599 | } |
1600 | ||
977e6b9f TH |
1601 | /** |
1602 | * ata_do_simple_cmd - execute simple internal command | |
1603 | * @dev: Device to which the command is sent | |
1604 | * @cmd: Opcode to execute | |
1605 | * | |
1606 | * Execute a 'simple' command, that only consists of the opcode | |
1607 | * 'cmd' itself, without filling any other registers | |
1608 | * | |
1609 | * LOCKING: | |
1610 | * Kernel thread context (may sleep). | |
1611 | * | |
1612 | * RETURNS: | |
1613 | * Zero on success, AC_ERR_* mask on failure | |
e58eb583 | 1614 | */ |
77b08fb5 | 1615 | unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
e58eb583 TH |
1616 | { |
1617 | struct ata_taskfile tf; | |
e58eb583 TH |
1618 | |
1619 | ata_tf_init(dev, &tf); | |
1620 | ||
1621 | tf.command = cmd; | |
1622 | tf.flags |= ATA_TFLAG_DEVICE; | |
1623 | tf.protocol = ATA_PROT_NODATA; | |
1624 | ||
977e6b9f | 1625 | return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
e58eb583 TH |
1626 | } |
1627 | ||
1bc4ccff AC |
1628 | /** |
1629 | * ata_pio_need_iordy - check if iordy needed | |
1630 | * @adev: ATA device | |
1631 | * | |
1632 | * Check if the current speed of the device requires IORDY. Used | |
1633 | * by various controllers for chip configuration. | |
1634 | */ | |
a617c09f | 1635 | |
1bc4ccff AC |
1636 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
1637 | { | |
432729f0 AC |
1638 | /* Controller doesn't support IORDY. Probably a pointless check |
1639 | as the caller should know this */ | |
9af5c9c9 | 1640 | if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) |
1bc4ccff | 1641 | return 0; |
432729f0 AC |
1642 | /* PIO3 and higher it is mandatory */ |
1643 | if (adev->pio_mode > XFER_PIO_2) | |
1644 | return 1; | |
1645 | /* We turn it on when possible */ | |
1646 | if (ata_id_has_iordy(adev->id)) | |
1bc4ccff | 1647 | return 1; |
432729f0 AC |
1648 | return 0; |
1649 | } | |
2e9edbf8 | 1650 | |
432729f0 AC |
1651 | /** |
1652 | * ata_pio_mask_no_iordy - Return the non IORDY mask | |
1653 | * @adev: ATA device | |
1654 | * | |
1655 | * Compute the highest mode possible if we are not using iordy. Return | |
1656 | * -1 if no iordy mode is available. | |
1657 | */ | |
a617c09f | 1658 | |
432729f0 AC |
1659 | static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) |
1660 | { | |
1bc4ccff | 1661 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
1bc4ccff | 1662 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
432729f0 | 1663 | u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
1bc4ccff AC |
1664 | /* Is the speed faster than the drive allows non IORDY ? */ |
1665 | if (pio) { | |
1666 | /* This is cycle times not frequency - watch the logic! */ | |
1667 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
432729f0 AC |
1668 | return 3 << ATA_SHIFT_PIO; |
1669 | return 7 << ATA_SHIFT_PIO; | |
1bc4ccff AC |
1670 | } |
1671 | } | |
432729f0 | 1672 | return 3 << ATA_SHIFT_PIO; |
1bc4ccff AC |
1673 | } |
1674 | ||
1da177e4 | 1675 | /** |
49016aca | 1676 | * ata_dev_read_id - Read ID data from the specified device |
49016aca TH |
1677 | * @dev: target device |
1678 | * @p_class: pointer to class of the target device (may be changed) | |
bff04647 | 1679 | * @flags: ATA_READID_* flags |
fe635c7e | 1680 | * @id: buffer to read IDENTIFY data into |
1da177e4 | 1681 | * |
49016aca TH |
1682 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
1683 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
aec5c3c1 TH |
1684 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
1685 | * for pre-ATA4 drives. | |
1da177e4 | 1686 | * |
50a99018 AC |
1687 | * FIXME: ATA_CMD_ID_ATA is optional for early drives and right |
1688 | * now we abort if we hit that case. | |
1689 | * | |
1da177e4 | 1690 | * LOCKING: |
49016aca TH |
1691 | * Kernel thread context (may sleep) |
1692 | * | |
1693 | * RETURNS: | |
1694 | * 0 on success, -errno otherwise. | |
1da177e4 | 1695 | */ |
a9beec95 | 1696 | int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, |
bff04647 | 1697 | unsigned int flags, u16 *id) |
1da177e4 | 1698 | { |
9af5c9c9 | 1699 | struct ata_port *ap = dev->link->ap; |
49016aca | 1700 | unsigned int class = *p_class; |
a0123703 | 1701 | struct ata_taskfile tf; |
49016aca TH |
1702 | unsigned int err_mask = 0; |
1703 | const char *reason; | |
54936f8b | 1704 | int may_fallback = 1, tried_spinup = 0; |
49016aca | 1705 | int rc; |
1da177e4 | 1706 | |
0dd4b21f | 1707 | if (ata_msg_ctl(ap)) |
44877b4e | 1708 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); |
1da177e4 | 1709 | |
49016aca | 1710 | ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ |
49016aca | 1711 | retry: |
3373efd8 | 1712 | ata_tf_init(dev, &tf); |
a0123703 | 1713 | |
49016aca TH |
1714 | switch (class) { |
1715 | case ATA_DEV_ATA: | |
a0123703 | 1716 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
1717 | break; |
1718 | case ATA_DEV_ATAPI: | |
a0123703 | 1719 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
1720 | break; |
1721 | default: | |
1722 | rc = -ENODEV; | |
1723 | reason = "unsupported class"; | |
1724 | goto err_out; | |
1da177e4 LT |
1725 | } |
1726 | ||
a0123703 | 1727 | tf.protocol = ATA_PROT_PIO; |
81afe893 TH |
1728 | |
1729 | /* Some devices choke if TF registers contain garbage. Make | |
1730 | * sure those are properly initialized. | |
1731 | */ | |
1732 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1733 | ||
1734 | /* Device presence detection is unreliable on some | |
1735 | * controllers. Always poll IDENTIFY if available. | |
1736 | */ | |
1737 | tf.flags |= ATA_TFLAG_POLLING; | |
1da177e4 | 1738 | |
3373efd8 | 1739 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
49016aca | 1740 | id, sizeof(id[0]) * ATA_ID_WORDS); |
a0123703 | 1741 | if (err_mask) { |
800b3996 | 1742 | if (err_mask & AC_ERR_NODEV_HINT) { |
55a8e2c8 | 1743 | DPRINTK("ata%u.%d: NODEV after polling detection\n", |
44877b4e | 1744 | ap->print_id, dev->devno); |
55a8e2c8 TH |
1745 | return -ENOENT; |
1746 | } | |
1747 | ||
54936f8b TH |
1748 | /* Device or controller might have reported the wrong |
1749 | * device class. Give a shot at the other IDENTIFY if | |
1750 | * the current one is aborted by the device. | |
1751 | */ | |
1752 | if (may_fallback && | |
1753 | (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { | |
1754 | may_fallback = 0; | |
1755 | ||
1756 | if (class == ATA_DEV_ATA) | |
1757 | class = ATA_DEV_ATAPI; | |
1758 | else | |
1759 | class = ATA_DEV_ATA; | |
1760 | goto retry; | |
1761 | } | |
1762 | ||
49016aca TH |
1763 | rc = -EIO; |
1764 | reason = "I/O error"; | |
1da177e4 LT |
1765 | goto err_out; |
1766 | } | |
1767 | ||
54936f8b TH |
1768 | /* Falling back doesn't make sense if ID data was read |
1769 | * successfully at least once. | |
1770 | */ | |
1771 | may_fallback = 0; | |
1772 | ||
49016aca | 1773 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 | 1774 | |
49016aca | 1775 | /* sanity check */ |
a4f5749b | 1776 | rc = -EINVAL; |
6070068b | 1777 | reason = "device reports invalid type"; |
a4f5749b TH |
1778 | |
1779 | if (class == ATA_DEV_ATA) { | |
1780 | if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) | |
1781 | goto err_out; | |
1782 | } else { | |
1783 | if (ata_id_is_ata(id)) | |
1784 | goto err_out; | |
49016aca TH |
1785 | } |
1786 | ||
169439c2 ML |
1787 | if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { |
1788 | tried_spinup = 1; | |
1789 | /* | |
1790 | * Drive powered-up in standby mode, and requires a specific | |
1791 | * SET_FEATURES spin-up subcommand before it will accept | |
1792 | * anything other than the original IDENTIFY command. | |
1793 | */ | |
1794 | ata_tf_init(dev, &tf); | |
1795 | tf.command = ATA_CMD_SET_FEATURES; | |
1796 | tf.feature = SETFEATURES_SPINUP; | |
1797 | tf.protocol = ATA_PROT_NODATA; | |
1798 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1799 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
fb0582f9 | 1800 | if (err_mask && id[2] != 0x738c) { |
169439c2 ML |
1801 | rc = -EIO; |
1802 | reason = "SPINUP failed"; | |
1803 | goto err_out; | |
1804 | } | |
1805 | /* | |
1806 | * If the drive initially returned incomplete IDENTIFY info, | |
1807 | * we now must reissue the IDENTIFY command. | |
1808 | */ | |
1809 | if (id[2] == 0x37c8) | |
1810 | goto retry; | |
1811 | } | |
1812 | ||
bff04647 | 1813 | if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { |
49016aca TH |
1814 | /* |
1815 | * The exact sequence expected by certain pre-ATA4 drives is: | |
1816 | * SRST RESET | |
50a99018 AC |
1817 | * IDENTIFY (optional in early ATA) |
1818 | * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) | |
49016aca TH |
1819 | * anything else.. |
1820 | * Some drives were very specific about that exact sequence. | |
50a99018 AC |
1821 | * |
1822 | * Note that ATA4 says lba is mandatory so the second check | |
1823 | * shoud never trigger. | |
49016aca TH |
1824 | */ |
1825 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
3373efd8 | 1826 | err_mask = ata_dev_init_params(dev, id[3], id[6]); |
49016aca TH |
1827 | if (err_mask) { |
1828 | rc = -EIO; | |
1829 | reason = "INIT_DEV_PARAMS failed"; | |
1830 | goto err_out; | |
1831 | } | |
1832 | ||
1833 | /* current CHS translation info (id[53-58]) might be | |
1834 | * changed. reread the identify device info. | |
1835 | */ | |
bff04647 | 1836 | flags &= ~ATA_READID_POSTRESET; |
49016aca TH |
1837 | goto retry; |
1838 | } | |
1839 | } | |
1840 | ||
1841 | *p_class = class; | |
fe635c7e | 1842 | |
49016aca TH |
1843 | return 0; |
1844 | ||
1845 | err_out: | |
88574551 | 1846 | if (ata_msg_warn(ap)) |
0dd4b21f | 1847 | ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
88574551 | 1848 | "(%s, err_mask=0x%x)\n", reason, err_mask); |
49016aca TH |
1849 | return rc; |
1850 | } | |
1851 | ||
3373efd8 | 1852 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
4b2f3ede | 1853 | { |
9af5c9c9 TH |
1854 | struct ata_port *ap = dev->link->ap; |
1855 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); | |
4b2f3ede TH |
1856 | } |
1857 | ||
a6e6ce8e TH |
1858 | static void ata_dev_config_ncq(struct ata_device *dev, |
1859 | char *desc, size_t desc_sz) | |
1860 | { | |
9af5c9c9 | 1861 | struct ata_port *ap = dev->link->ap; |
a6e6ce8e TH |
1862 | int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); |
1863 | ||
1864 | if (!ata_id_has_ncq(dev->id)) { | |
1865 | desc[0] = '\0'; | |
1866 | return; | |
1867 | } | |
75683fe7 | 1868 | if (dev->horkage & ATA_HORKAGE_NONCQ) { |
6919a0a6 AC |
1869 | snprintf(desc, desc_sz, "NCQ (not used)"); |
1870 | return; | |
1871 | } | |
a6e6ce8e | 1872 | if (ap->flags & ATA_FLAG_NCQ) { |
cca3974e | 1873 | hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
a6e6ce8e TH |
1874 | dev->flags |= ATA_DFLAG_NCQ; |
1875 | } | |
1876 | ||
1877 | if (hdepth >= ddepth) | |
1878 | snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); | |
1879 | else | |
1880 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); | |
1881 | } | |
1882 | ||
49016aca | 1883 | /** |
ffeae418 | 1884 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
ffeae418 TH |
1885 | * @dev: Target device to configure |
1886 | * | |
1887 | * Configure @dev according to @dev->id. Generic and low-level | |
1888 | * driver specific fixups are also applied. | |
49016aca TH |
1889 | * |
1890 | * LOCKING: | |
ffeae418 TH |
1891 | * Kernel thread context (may sleep) |
1892 | * | |
1893 | * RETURNS: | |
1894 | * 0 on success, -errno otherwise | |
49016aca | 1895 | */ |
efdaedc4 | 1896 | int ata_dev_configure(struct ata_device *dev) |
49016aca | 1897 | { |
9af5c9c9 TH |
1898 | struct ata_port *ap = dev->link->ap; |
1899 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
6746544c | 1900 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
1148c3a7 | 1901 | const u16 *id = dev->id; |
ff8854b2 | 1902 | unsigned int xfer_mask; |
b352e57d | 1903 | char revbuf[7]; /* XYZ-99\0 */ |
3f64f565 EM |
1904 | char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
1905 | char modelbuf[ATA_ID_PROD_LEN+1]; | |
e6d902a3 | 1906 | int rc; |
49016aca | 1907 | |
0dd4b21f | 1908 | if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
44877b4e TH |
1909 | ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", |
1910 | __FUNCTION__); | |
ffeae418 | 1911 | return 0; |
49016aca TH |
1912 | } |
1913 | ||
0dd4b21f | 1914 | if (ata_msg_probe(ap)) |
44877b4e | 1915 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); |
1da177e4 | 1916 | |
75683fe7 TH |
1917 | /* set horkage */ |
1918 | dev->horkage |= ata_dev_blacklisted(dev); | |
1919 | ||
6746544c TH |
1920 | /* let ACPI work its magic */ |
1921 | rc = ata_acpi_on_devcfg(dev); | |
1922 | if (rc) | |
1923 | return rc; | |
08573a86 | 1924 | |
05027adc TH |
1925 | /* massage HPA, do it early as it might change IDENTIFY data */ |
1926 | rc = ata_hpa_resize(dev); | |
1927 | if (rc) | |
1928 | return rc; | |
1929 | ||
c39f5ebe | 1930 | /* print device capabilities */ |
0dd4b21f | 1931 | if (ata_msg_probe(ap)) |
88574551 TH |
1932 | ata_dev_printk(dev, KERN_DEBUG, |
1933 | "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " | |
1934 | "85:%04x 86:%04x 87:%04x 88:%04x\n", | |
0dd4b21f | 1935 | __FUNCTION__, |
f15a1daf TH |
1936 | id[49], id[82], id[83], id[84], |
1937 | id[85], id[86], id[87], id[88]); | |
c39f5ebe | 1938 | |
208a9933 | 1939 | /* initialize to-be-configured parameters */ |
ea1dd4e1 | 1940 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
208a9933 TH |
1941 | dev->max_sectors = 0; |
1942 | dev->cdb_len = 0; | |
1943 | dev->n_sectors = 0; | |
1944 | dev->cylinders = 0; | |
1945 | dev->heads = 0; | |
1946 | dev->sectors = 0; | |
1947 | ||
1da177e4 LT |
1948 | /* |
1949 | * common ATA, ATAPI feature tests | |
1950 | */ | |
1951 | ||
ff8854b2 | 1952 | /* find max transfer mode; for printk only */ |
1148c3a7 | 1953 | xfer_mask = ata_id_xfermask(id); |
1da177e4 | 1954 | |
0dd4b21f BP |
1955 | if (ata_msg_probe(ap)) |
1956 | ata_dump_id(id); | |
1da177e4 | 1957 | |
ef143d57 AL |
1958 | /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
1959 | ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, | |
1960 | sizeof(fwrevbuf)); | |
1961 | ||
1962 | ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, | |
1963 | sizeof(modelbuf)); | |
1964 | ||
1da177e4 LT |
1965 | /* ATA-specific feature tests */ |
1966 | if (dev->class == ATA_DEV_ATA) { | |
b352e57d AC |
1967 | if (ata_id_is_cfa(id)) { |
1968 | if (id[162] & 1) /* CPRM may make this media unusable */ | |
44877b4e TH |
1969 | ata_dev_printk(dev, KERN_WARNING, |
1970 | "supports DRM functions and may " | |
1971 | "not be fully accessable.\n"); | |
b352e57d AC |
1972 | snprintf(revbuf, 7, "CFA"); |
1973 | } | |
1974 | else | |
1975 | snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); | |
1976 | ||
1148c3a7 | 1977 | dev->n_sectors = ata_id_n_sectors(id); |
2940740b | 1978 | |
3f64f565 EM |
1979 | if (dev->id[59] & 0x100) |
1980 | dev->multi_count = dev->id[59] & 0xff; | |
1981 | ||
1148c3a7 | 1982 | if (ata_id_has_lba(id)) { |
4c2d721a | 1983 | const char *lba_desc; |
a6e6ce8e | 1984 | char ncq_desc[20]; |
8bf62ece | 1985 | |
4c2d721a TH |
1986 | lba_desc = "LBA"; |
1987 | dev->flags |= ATA_DFLAG_LBA; | |
1148c3a7 | 1988 | if (ata_id_has_lba48(id)) { |
8bf62ece | 1989 | dev->flags |= ATA_DFLAG_LBA48; |
4c2d721a | 1990 | lba_desc = "LBA48"; |
6fc49adb TH |
1991 | |
1992 | if (dev->n_sectors >= (1UL << 28) && | |
1993 | ata_id_has_flush_ext(id)) | |
1994 | dev->flags |= ATA_DFLAG_FLUSH_EXT; | |
4c2d721a | 1995 | } |
8bf62ece | 1996 | |
a6e6ce8e TH |
1997 | /* config NCQ */ |
1998 | ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); | |
1999 | ||
8bf62ece | 2000 | /* print device info to dmesg */ |
3f64f565 EM |
2001 | if (ata_msg_drv(ap) && print_info) { |
2002 | ata_dev_printk(dev, KERN_INFO, | |
2003 | "%s: %s, %s, max %s\n", | |
2004 | revbuf, modelbuf, fwrevbuf, | |
2005 | ata_mode_string(xfer_mask)); | |
2006 | ata_dev_printk(dev, KERN_INFO, | |
2007 | "%Lu sectors, multi %u: %s %s\n", | |
f15a1daf | 2008 | (unsigned long long)dev->n_sectors, |
3f64f565 EM |
2009 | dev->multi_count, lba_desc, ncq_desc); |
2010 | } | |
ffeae418 | 2011 | } else { |
8bf62ece AL |
2012 | /* CHS */ |
2013 | ||
2014 | /* Default translation */ | |
1148c3a7 TH |
2015 | dev->cylinders = id[1]; |
2016 | dev->heads = id[3]; | |
2017 | dev->sectors = id[6]; | |
8bf62ece | 2018 | |
1148c3a7 | 2019 | if (ata_id_current_chs_valid(id)) { |
8bf62ece | 2020 | /* Current CHS translation is valid. */ |
1148c3a7 TH |
2021 | dev->cylinders = id[54]; |
2022 | dev->heads = id[55]; | |
2023 | dev->sectors = id[56]; | |
8bf62ece AL |
2024 | } |
2025 | ||
2026 | /* print device info to dmesg */ | |
3f64f565 | 2027 | if (ata_msg_drv(ap) && print_info) { |
88574551 | 2028 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2029 | "%s: %s, %s, max %s\n", |
2030 | revbuf, modelbuf, fwrevbuf, | |
2031 | ata_mode_string(xfer_mask)); | |
a84471fe | 2032 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2033 | "%Lu sectors, multi %u, CHS %u/%u/%u\n", |
2034 | (unsigned long long)dev->n_sectors, | |
2035 | dev->multi_count, dev->cylinders, | |
2036 | dev->heads, dev->sectors); | |
2037 | } | |
07f6f7d0 AL |
2038 | } |
2039 | ||
6e7846e9 | 2040 | dev->cdb_len = 16; |
1da177e4 LT |
2041 | } |
2042 | ||
2043 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 2044 | else if (dev->class == ATA_DEV_ATAPI) { |
854c73a2 TH |
2045 | const char *cdb_intr_string = ""; |
2046 | const char *atapi_an_string = ""; | |
7d77b247 | 2047 | u32 sntf; |
08a556db | 2048 | |
1148c3a7 | 2049 | rc = atapi_cdb_len(id); |
1da177e4 | 2050 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
0dd4b21f | 2051 | if (ata_msg_warn(ap)) |
88574551 TH |
2052 | ata_dev_printk(dev, KERN_WARNING, |
2053 | "unsupported CDB len\n"); | |
ffeae418 | 2054 | rc = -EINVAL; |
1da177e4 LT |
2055 | goto err_out_nosup; |
2056 | } | |
6e7846e9 | 2057 | dev->cdb_len = (unsigned int) rc; |
1da177e4 | 2058 | |
7d77b247 TH |
2059 | /* Enable ATAPI AN if both the host and device have |
2060 | * the support. If PMP is attached, SNTF is required | |
2061 | * to enable ATAPI AN to discern between PHY status | |
2062 | * changed notifications and ATAPI ANs. | |
9f45cbd3 | 2063 | */ |
7d77b247 TH |
2064 | if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && |
2065 | (!ap->nr_pmp_links || | |
2066 | sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { | |
854c73a2 TH |
2067 | unsigned int err_mask; |
2068 | ||
9f45cbd3 | 2069 | /* issue SET feature command to turn this on */ |
854c73a2 TH |
2070 | err_mask = ata_dev_set_AN(dev, SETFEATURES_SATA_ENABLE); |
2071 | if (err_mask) | |
9f45cbd3 | 2072 | ata_dev_printk(dev, KERN_ERR, |
854c73a2 TH |
2073 | "failed to enable ATAPI AN " |
2074 | "(err_mask=0x%x)\n", err_mask); | |
2075 | else { | |
9f45cbd3 | 2076 | dev->flags |= ATA_DFLAG_AN; |
854c73a2 TH |
2077 | atapi_an_string = ", ATAPI AN"; |
2078 | } | |
9f45cbd3 KCA |
2079 | } |
2080 | ||
08a556db | 2081 | if (ata_id_cdb_intr(dev->id)) { |
312f7da2 | 2082 | dev->flags |= ATA_DFLAG_CDB_INTR; |
08a556db AL |
2083 | cdb_intr_string = ", CDB intr"; |
2084 | } | |
312f7da2 | 2085 | |
1da177e4 | 2086 | /* print device info to dmesg */ |
5afc8142 | 2087 | if (ata_msg_drv(ap) && print_info) |
ef143d57 | 2088 | ata_dev_printk(dev, KERN_INFO, |
854c73a2 | 2089 | "ATAPI: %s, %s, max %s%s%s\n", |
ef143d57 | 2090 | modelbuf, fwrevbuf, |
12436c30 | 2091 | ata_mode_string(xfer_mask), |
854c73a2 | 2092 | cdb_intr_string, atapi_an_string); |
1da177e4 LT |
2093 | } |
2094 | ||
914ed354 TH |
2095 | /* determine max_sectors */ |
2096 | dev->max_sectors = ATA_MAX_SECTORS; | |
2097 | if (dev->flags & ATA_DFLAG_LBA48) | |
2098 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; | |
2099 | ||
93590859 AC |
2100 | if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
2101 | /* Let the user know. We don't want to disallow opens for | |
2102 | rescue purposes, or in case the vendor is just a blithering | |
2103 | idiot */ | |
2104 | if (print_info) { | |
2105 | ata_dev_printk(dev, KERN_WARNING, | |
2106 | "Drive reports diagnostics failure. This may indicate a drive\n"); | |
2107 | ata_dev_printk(dev, KERN_WARNING, | |
2108 | "fault or invalid emulation. Contact drive vendor for information.\n"); | |
2109 | } | |
2110 | } | |
2111 | ||
4b2f3ede | 2112 | /* limit bridge transfers to udma5, 200 sectors */ |
3373efd8 | 2113 | if (ata_dev_knobble(dev)) { |
5afc8142 | 2114 | if (ata_msg_drv(ap) && print_info) |
f15a1daf TH |
2115 | ata_dev_printk(dev, KERN_INFO, |
2116 | "applying bridge limits\n"); | |
5a529139 | 2117 | dev->udma_mask &= ATA_UDMA5; |
4b2f3ede TH |
2118 | dev->max_sectors = ATA_MAX_SECTORS; |
2119 | } | |
2120 | ||
75683fe7 | 2121 | if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) |
03ec52de TH |
2122 | dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, |
2123 | dev->max_sectors); | |
18d6e9d5 | 2124 | |
4b2f3ede | 2125 | if (ap->ops->dev_config) |
cd0d3bbc | 2126 | ap->ops->dev_config(dev); |
4b2f3ede | 2127 | |
0dd4b21f BP |
2128 | if (ata_msg_probe(ap)) |
2129 | ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", | |
2130 | __FUNCTION__, ata_chk_status(ap)); | |
ffeae418 | 2131 | return 0; |
1da177e4 LT |
2132 | |
2133 | err_out_nosup: | |
0dd4b21f | 2134 | if (ata_msg_probe(ap)) |
88574551 TH |
2135 | ata_dev_printk(dev, KERN_DEBUG, |
2136 | "%s: EXIT, err\n", __FUNCTION__); | |
ffeae418 | 2137 | return rc; |
1da177e4 LT |
2138 | } |
2139 | ||
be0d18df | 2140 | /** |
2e41e8e6 | 2141 | * ata_cable_40wire - return 40 wire cable type |
be0d18df AC |
2142 | * @ap: port |
2143 | * | |
2e41e8e6 | 2144 | * Helper method for drivers which want to hardwire 40 wire cable |
be0d18df AC |
2145 | * detection. |
2146 | */ | |
2147 | ||
2148 | int ata_cable_40wire(struct ata_port *ap) | |
2149 | { | |
2150 | return ATA_CBL_PATA40; | |
2151 | } | |
2152 | ||
2153 | /** | |
2e41e8e6 | 2154 | * ata_cable_80wire - return 80 wire cable type |
be0d18df AC |
2155 | * @ap: port |
2156 | * | |
2e41e8e6 | 2157 | * Helper method for drivers which want to hardwire 80 wire cable |
be0d18df AC |
2158 | * detection. |
2159 | */ | |
2160 | ||
2161 | int ata_cable_80wire(struct ata_port *ap) | |
2162 | { | |
2163 | return ATA_CBL_PATA80; | |
2164 | } | |
2165 | ||
2166 | /** | |
2167 | * ata_cable_unknown - return unknown PATA cable. | |
2168 | * @ap: port | |
2169 | * | |
2170 | * Helper method for drivers which have no PATA cable detection. | |
2171 | */ | |
2172 | ||
2173 | int ata_cable_unknown(struct ata_port *ap) | |
2174 | { | |
2175 | return ATA_CBL_PATA_UNK; | |
2176 | } | |
2177 | ||
2178 | /** | |
2179 | * ata_cable_sata - return SATA cable type | |
2180 | * @ap: port | |
2181 | * | |
2182 | * Helper method for drivers which have SATA cables | |
2183 | */ | |
2184 | ||
2185 | int ata_cable_sata(struct ata_port *ap) | |
2186 | { | |
2187 | return ATA_CBL_SATA; | |
2188 | } | |
2189 | ||
1da177e4 LT |
2190 | /** |
2191 | * ata_bus_probe - Reset and probe ATA bus | |
2192 | * @ap: Bus to probe | |
2193 | * | |
0cba632b JG |
2194 | * Master ATA bus probing function. Initiates a hardware-dependent |
2195 | * bus reset, then attempts to identify any devices found on | |
2196 | * the bus. | |
2197 | * | |
1da177e4 | 2198 | * LOCKING: |
0cba632b | 2199 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2200 | * |
2201 | * RETURNS: | |
96072e69 | 2202 | * Zero on success, negative errno otherwise. |
1da177e4 LT |
2203 | */ |
2204 | ||
80289167 | 2205 | int ata_bus_probe(struct ata_port *ap) |
1da177e4 | 2206 | { |
28ca5c57 | 2207 | unsigned int classes[ATA_MAX_DEVICES]; |
14d2bac1 | 2208 | int tries[ATA_MAX_DEVICES]; |
f58229f8 | 2209 | int rc; |
e82cbdb9 | 2210 | struct ata_device *dev; |
1da177e4 | 2211 | |
28ca5c57 | 2212 | ata_port_probe(ap); |
c19ba8af | 2213 | |
f58229f8 TH |
2214 | ata_link_for_each_dev(dev, &ap->link) |
2215 | tries[dev->devno] = ATA_PROBE_MAX_TRIES; | |
14d2bac1 TH |
2216 | |
2217 | retry: | |
2044470c | 2218 | /* reset and determine device classes */ |
52783c5d | 2219 | ap->ops->phy_reset(ap); |
2061a47a | 2220 | |
f58229f8 | 2221 | ata_link_for_each_dev(dev, &ap->link) { |
52783c5d TH |
2222 | if (!(ap->flags & ATA_FLAG_DISABLED) && |
2223 | dev->class != ATA_DEV_UNKNOWN) | |
2224 | classes[dev->devno] = dev->class; | |
2225 | else | |
2226 | classes[dev->devno] = ATA_DEV_NONE; | |
2044470c | 2227 | |
52783c5d | 2228 | dev->class = ATA_DEV_UNKNOWN; |
28ca5c57 | 2229 | } |
1da177e4 | 2230 | |
52783c5d | 2231 | ata_port_probe(ap); |
2044470c | 2232 | |
b6079ca4 AC |
2233 | /* after the reset the device state is PIO 0 and the controller |
2234 | state is undefined. Record the mode */ | |
2235 | ||
f58229f8 TH |
2236 | ata_link_for_each_dev(dev, &ap->link) |
2237 | dev->pio_mode = XFER_PIO_0; | |
b6079ca4 | 2238 | |
f31f0cc2 JG |
2239 | /* read IDENTIFY page and configure devices. We have to do the identify |
2240 | specific sequence bass-ackwards so that PDIAG- is released by | |
2241 | the slave device */ | |
2242 | ||
f58229f8 TH |
2243 | ata_link_for_each_dev(dev, &ap->link) { |
2244 | if (tries[dev->devno]) | |
2245 | dev->class = classes[dev->devno]; | |
ffeae418 | 2246 | |
14d2bac1 | 2247 | if (!ata_dev_enabled(dev)) |
ffeae418 | 2248 | continue; |
ffeae418 | 2249 | |
bff04647 TH |
2250 | rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
2251 | dev->id); | |
14d2bac1 TH |
2252 | if (rc) |
2253 | goto fail; | |
f31f0cc2 JG |
2254 | } |
2255 | ||
be0d18df AC |
2256 | /* Now ask for the cable type as PDIAG- should have been released */ |
2257 | if (ap->ops->cable_detect) | |
2258 | ap->cbl = ap->ops->cable_detect(ap); | |
2259 | ||
614fe29b AC |
2260 | /* We may have SATA bridge glue hiding here irrespective of the |
2261 | reported cable types and sensed types */ | |
2262 | ata_link_for_each_dev(dev, &ap->link) { | |
2263 | if (!ata_dev_enabled(dev)) | |
2264 | continue; | |
2265 | /* SATA drives indicate we have a bridge. We don't know which | |
2266 | end of the link the bridge is which is a problem */ | |
2267 | if (ata_id_is_sata(dev->id)) | |
2268 | ap->cbl = ATA_CBL_SATA; | |
2269 | } | |
2270 | ||
f31f0cc2 JG |
2271 | /* After the identify sequence we can now set up the devices. We do |
2272 | this in the normal order so that the user doesn't get confused */ | |
2273 | ||
f58229f8 | 2274 | ata_link_for_each_dev(dev, &ap->link) { |
f31f0cc2 JG |
2275 | if (!ata_dev_enabled(dev)) |
2276 | continue; | |
14d2bac1 | 2277 | |
9af5c9c9 | 2278 | ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; |
efdaedc4 | 2279 | rc = ata_dev_configure(dev); |
9af5c9c9 | 2280 | ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; |
14d2bac1 TH |
2281 | if (rc) |
2282 | goto fail; | |
1da177e4 LT |
2283 | } |
2284 | ||
e82cbdb9 | 2285 | /* configure transfer mode */ |
0260731f | 2286 | rc = ata_set_mode(&ap->link, &dev); |
4ae72a1e | 2287 | if (rc) |
51713d35 | 2288 | goto fail; |
1da177e4 | 2289 | |
f58229f8 TH |
2290 | ata_link_for_each_dev(dev, &ap->link) |
2291 | if (ata_dev_enabled(dev)) | |
e82cbdb9 | 2292 | return 0; |
1da177e4 | 2293 | |
e82cbdb9 TH |
2294 | /* no device present, disable port */ |
2295 | ata_port_disable(ap); | |
96072e69 | 2296 | return -ENODEV; |
14d2bac1 TH |
2297 | |
2298 | fail: | |
4ae72a1e TH |
2299 | tries[dev->devno]--; |
2300 | ||
14d2bac1 TH |
2301 | switch (rc) { |
2302 | case -EINVAL: | |
4ae72a1e | 2303 | /* eeek, something went very wrong, give up */ |
14d2bac1 TH |
2304 | tries[dev->devno] = 0; |
2305 | break; | |
4ae72a1e TH |
2306 | |
2307 | case -ENODEV: | |
2308 | /* give it just one more chance */ | |
2309 | tries[dev->devno] = min(tries[dev->devno], 1); | |
14d2bac1 | 2310 | case -EIO: |
4ae72a1e TH |
2311 | if (tries[dev->devno] == 1) { |
2312 | /* This is the last chance, better to slow | |
2313 | * down than lose it. | |
2314 | */ | |
936fd732 | 2315 | sata_down_spd_limit(&ap->link); |
4ae72a1e TH |
2316 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
2317 | } | |
14d2bac1 TH |
2318 | } |
2319 | ||
4ae72a1e | 2320 | if (!tries[dev->devno]) |
3373efd8 | 2321 | ata_dev_disable(dev); |
ec573755 | 2322 | |
14d2bac1 | 2323 | goto retry; |
1da177e4 LT |
2324 | } |
2325 | ||
2326 | /** | |
0cba632b JG |
2327 | * ata_port_probe - Mark port as enabled |
2328 | * @ap: Port for which we indicate enablement | |
1da177e4 | 2329 | * |
0cba632b JG |
2330 | * Modify @ap data structure such that the system |
2331 | * thinks that the entire port is enabled. | |
2332 | * | |
cca3974e | 2333 | * LOCKING: host lock, or some other form of |
0cba632b | 2334 | * serialization. |
1da177e4 LT |
2335 | */ |
2336 | ||
2337 | void ata_port_probe(struct ata_port *ap) | |
2338 | { | |
198e0fed | 2339 | ap->flags &= ~ATA_FLAG_DISABLED; |
1da177e4 LT |
2340 | } |
2341 | ||
3be680b7 TH |
2342 | /** |
2343 | * sata_print_link_status - Print SATA link status | |
936fd732 | 2344 | * @link: SATA link to printk link status about |
3be680b7 TH |
2345 | * |
2346 | * This function prints link speed and status of a SATA link. | |
2347 | * | |
2348 | * LOCKING: | |
2349 | * None. | |
2350 | */ | |
936fd732 | 2351 | void sata_print_link_status(struct ata_link *link) |
3be680b7 | 2352 | { |
6d5f9732 | 2353 | u32 sstatus, scontrol, tmp; |
3be680b7 | 2354 | |
936fd732 | 2355 | if (sata_scr_read(link, SCR_STATUS, &sstatus)) |
3be680b7 | 2356 | return; |
936fd732 | 2357 | sata_scr_read(link, SCR_CONTROL, &scontrol); |
3be680b7 | 2358 | |
936fd732 | 2359 | if (ata_link_online(link)) { |
3be680b7 | 2360 | tmp = (sstatus >> 4) & 0xf; |
936fd732 | 2361 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2362 | "SATA link up %s (SStatus %X SControl %X)\n", |
2363 | sata_spd_string(tmp), sstatus, scontrol); | |
3be680b7 | 2364 | } else { |
936fd732 | 2365 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2366 | "SATA link down (SStatus %X SControl %X)\n", |
2367 | sstatus, scontrol); | |
3be680b7 TH |
2368 | } |
2369 | } | |
2370 | ||
1da177e4 | 2371 | /** |
780a87f7 JG |
2372 | * __sata_phy_reset - Wake/reset a low-level SATA PHY |
2373 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 2374 | * |
780a87f7 JG |
2375 | * This function issues commands to standard SATA Sxxx |
2376 | * PHY registers, to wake up the phy (and device), and | |
2377 | * clear any reset condition. | |
1da177e4 LT |
2378 | * |
2379 | * LOCKING: | |
0cba632b | 2380 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2381 | * |
2382 | */ | |
2383 | void __sata_phy_reset(struct ata_port *ap) | |
2384 | { | |
936fd732 | 2385 | struct ata_link *link = &ap->link; |
1da177e4 | 2386 | unsigned long timeout = jiffies + (HZ * 5); |
936fd732 | 2387 | u32 sstatus; |
1da177e4 LT |
2388 | |
2389 | if (ap->flags & ATA_FLAG_SATA_RESET) { | |
cdcca89e | 2390 | /* issue phy wake/reset */ |
936fd732 | 2391 | sata_scr_write_flush(link, SCR_CONTROL, 0x301); |
62ba2841 TH |
2392 | /* Couldn't find anything in SATA I/II specs, but |
2393 | * AHCI-1.1 10.4.2 says at least 1 ms. */ | |
2394 | mdelay(1); | |
1da177e4 | 2395 | } |
81952c54 | 2396 | /* phy wake/clear reset */ |
936fd732 | 2397 | sata_scr_write_flush(link, SCR_CONTROL, 0x300); |
1da177e4 LT |
2398 | |
2399 | /* wait for phy to become ready, if necessary */ | |
2400 | do { | |
2401 | msleep(200); | |
936fd732 | 2402 | sata_scr_read(link, SCR_STATUS, &sstatus); |
1da177e4 LT |
2403 | if ((sstatus & 0xf) != 1) |
2404 | break; | |
2405 | } while (time_before(jiffies, timeout)); | |
2406 | ||
3be680b7 | 2407 | /* print link status */ |
936fd732 | 2408 | sata_print_link_status(link); |
656563e3 | 2409 | |
3be680b7 | 2410 | /* TODO: phy layer with polling, timeouts, etc. */ |
936fd732 | 2411 | if (!ata_link_offline(link)) |
1da177e4 | 2412 | ata_port_probe(ap); |
3be680b7 | 2413 | else |
1da177e4 | 2414 | ata_port_disable(ap); |
1da177e4 | 2415 | |
198e0fed | 2416 | if (ap->flags & ATA_FLAG_DISABLED) |
1da177e4 LT |
2417 | return; |
2418 | ||
2419 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { | |
2420 | ata_port_disable(ap); | |
2421 | return; | |
2422 | } | |
2423 | ||
2424 | ap->cbl = ATA_CBL_SATA; | |
2425 | } | |
2426 | ||
2427 | /** | |
780a87f7 JG |
2428 | * sata_phy_reset - Reset SATA bus. |
2429 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 2430 | * |
780a87f7 JG |
2431 | * This function resets the SATA bus, and then probes |
2432 | * the bus for devices. | |
1da177e4 LT |
2433 | * |
2434 | * LOCKING: | |
0cba632b | 2435 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2436 | * |
2437 | */ | |
2438 | void sata_phy_reset(struct ata_port *ap) | |
2439 | { | |
2440 | __sata_phy_reset(ap); | |
198e0fed | 2441 | if (ap->flags & ATA_FLAG_DISABLED) |
1da177e4 LT |
2442 | return; |
2443 | ata_bus_reset(ap); | |
2444 | } | |
2445 | ||
ebdfca6e AC |
2446 | /** |
2447 | * ata_dev_pair - return other device on cable | |
ebdfca6e AC |
2448 | * @adev: device |
2449 | * | |
2450 | * Obtain the other device on the same cable, or if none is | |
2451 | * present NULL is returned | |
2452 | */ | |
2e9edbf8 | 2453 | |
3373efd8 | 2454 | struct ata_device *ata_dev_pair(struct ata_device *adev) |
ebdfca6e | 2455 | { |
9af5c9c9 TH |
2456 | struct ata_link *link = adev->link; |
2457 | struct ata_device *pair = &link->device[1 - adev->devno]; | |
e1211e3f | 2458 | if (!ata_dev_enabled(pair)) |
ebdfca6e AC |
2459 | return NULL; |
2460 | return pair; | |
2461 | } | |
2462 | ||
1da177e4 | 2463 | /** |
780a87f7 JG |
2464 | * ata_port_disable - Disable port. |
2465 | * @ap: Port to be disabled. | |
1da177e4 | 2466 | * |
780a87f7 JG |
2467 | * Modify @ap data structure such that the system |
2468 | * thinks that the entire port is disabled, and should | |
2469 | * never attempt to probe or communicate with devices | |
2470 | * on this port. | |
2471 | * | |
cca3974e | 2472 | * LOCKING: host lock, or some other form of |
780a87f7 | 2473 | * serialization. |
1da177e4 LT |
2474 | */ |
2475 | ||
2476 | void ata_port_disable(struct ata_port *ap) | |
2477 | { | |
9af5c9c9 TH |
2478 | ap->link.device[0].class = ATA_DEV_NONE; |
2479 | ap->link.device[1].class = ATA_DEV_NONE; | |
198e0fed | 2480 | ap->flags |= ATA_FLAG_DISABLED; |
1da177e4 LT |
2481 | } |
2482 | ||
1c3fae4d | 2483 | /** |
3c567b7d | 2484 | * sata_down_spd_limit - adjust SATA spd limit downward |
936fd732 | 2485 | * @link: Link to adjust SATA spd limit for |
1c3fae4d | 2486 | * |
936fd732 | 2487 | * Adjust SATA spd limit of @link downward. Note that this |
1c3fae4d | 2488 | * function only adjusts the limit. The change must be applied |
3c567b7d | 2489 | * using sata_set_spd(). |
1c3fae4d TH |
2490 | * |
2491 | * LOCKING: | |
2492 | * Inherited from caller. | |
2493 | * | |
2494 | * RETURNS: | |
2495 | * 0 on success, negative errno on failure | |
2496 | */ | |
936fd732 | 2497 | int sata_down_spd_limit(struct ata_link *link) |
1c3fae4d | 2498 | { |
81952c54 TH |
2499 | u32 sstatus, spd, mask; |
2500 | int rc, highbit; | |
1c3fae4d | 2501 | |
936fd732 | 2502 | if (!sata_scr_valid(link)) |
008a7896 TH |
2503 | return -EOPNOTSUPP; |
2504 | ||
2505 | /* If SCR can be read, use it to determine the current SPD. | |
936fd732 | 2506 | * If not, use cached value in link->sata_spd. |
008a7896 | 2507 | */ |
936fd732 | 2508 | rc = sata_scr_read(link, SCR_STATUS, &sstatus); |
008a7896 TH |
2509 | if (rc == 0) |
2510 | spd = (sstatus >> 4) & 0xf; | |
2511 | else | |
936fd732 | 2512 | spd = link->sata_spd; |
1c3fae4d | 2513 | |
936fd732 | 2514 | mask = link->sata_spd_limit; |
1c3fae4d TH |
2515 | if (mask <= 1) |
2516 | return -EINVAL; | |
008a7896 TH |
2517 | |
2518 | /* unconditionally mask off the highest bit */ | |
1c3fae4d TH |
2519 | highbit = fls(mask) - 1; |
2520 | mask &= ~(1 << highbit); | |
2521 | ||
008a7896 TH |
2522 | /* Mask off all speeds higher than or equal to the current |
2523 | * one. Force 1.5Gbps if current SPD is not available. | |
2524 | */ | |
2525 | if (spd > 1) | |
2526 | mask &= (1 << (spd - 1)) - 1; | |
2527 | else | |
2528 | mask &= 1; | |
2529 | ||
2530 | /* were we already at the bottom? */ | |
1c3fae4d TH |
2531 | if (!mask) |
2532 | return -EINVAL; | |
2533 | ||
936fd732 | 2534 | link->sata_spd_limit = mask; |
1c3fae4d | 2535 | |
936fd732 | 2536 | ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", |
f15a1daf | 2537 | sata_spd_string(fls(mask))); |
1c3fae4d TH |
2538 | |
2539 | return 0; | |
2540 | } | |
2541 | ||
936fd732 | 2542 | static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) |
1c3fae4d TH |
2543 | { |
2544 | u32 spd, limit; | |
2545 | ||
936fd732 | 2546 | if (link->sata_spd_limit == UINT_MAX) |
1c3fae4d TH |
2547 | limit = 0; |
2548 | else | |
936fd732 | 2549 | limit = fls(link->sata_spd_limit); |
1c3fae4d TH |
2550 | |
2551 | spd = (*scontrol >> 4) & 0xf; | |
2552 | *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); | |
2553 | ||
2554 | return spd != limit; | |
2555 | } | |
2556 | ||
2557 | /** | |
3c567b7d | 2558 | * sata_set_spd_needed - is SATA spd configuration needed |
936fd732 | 2559 | * @link: Link in question |
1c3fae4d TH |
2560 | * |
2561 | * Test whether the spd limit in SControl matches | |
936fd732 | 2562 | * @link->sata_spd_limit. This function is used to determine |
1c3fae4d TH |
2563 | * whether hardreset is necessary to apply SATA spd |
2564 | * configuration. | |
2565 | * | |
2566 | * LOCKING: | |
2567 | * Inherited from caller. | |
2568 | * | |
2569 | * RETURNS: | |
2570 | * 1 if SATA spd configuration is needed, 0 otherwise. | |
2571 | */ | |
936fd732 | 2572 | int sata_set_spd_needed(struct ata_link *link) |
1c3fae4d TH |
2573 | { |
2574 | u32 scontrol; | |
2575 | ||
936fd732 | 2576 | if (sata_scr_read(link, SCR_CONTROL, &scontrol)) |
1c3fae4d TH |
2577 | return 0; |
2578 | ||
936fd732 | 2579 | return __sata_set_spd_needed(link, &scontrol); |
1c3fae4d TH |
2580 | } |
2581 | ||
2582 | /** | |
3c567b7d | 2583 | * sata_set_spd - set SATA spd according to spd limit |
936fd732 | 2584 | * @link: Link to set SATA spd for |
1c3fae4d | 2585 | * |
936fd732 | 2586 | * Set SATA spd of @link according to sata_spd_limit. |
1c3fae4d TH |
2587 | * |
2588 | * LOCKING: | |
2589 | * Inherited from caller. | |
2590 | * | |
2591 | * RETURNS: | |
2592 | * 0 if spd doesn't need to be changed, 1 if spd has been | |
81952c54 | 2593 | * changed. Negative errno if SCR registers are inaccessible. |
1c3fae4d | 2594 | */ |
936fd732 | 2595 | int sata_set_spd(struct ata_link *link) |
1c3fae4d TH |
2596 | { |
2597 | u32 scontrol; | |
81952c54 | 2598 | int rc; |
1c3fae4d | 2599 | |
936fd732 | 2600 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 2601 | return rc; |
1c3fae4d | 2602 | |
936fd732 | 2603 | if (!__sata_set_spd_needed(link, &scontrol)) |
1c3fae4d TH |
2604 | return 0; |
2605 | ||
936fd732 | 2606 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 TH |
2607 | return rc; |
2608 | ||
1c3fae4d TH |
2609 | return 1; |
2610 | } | |
2611 | ||
452503f9 AC |
2612 | /* |
2613 | * This mode timing computation functionality is ported over from | |
2614 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
2615 | */ | |
2616 | /* | |
b352e57d | 2617 | * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). |
452503f9 | 2618 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
b352e57d AC |
2619 | * for UDMA6, which is currently supported only by Maxtor drives. |
2620 | * | |
2621 | * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. | |
452503f9 AC |
2622 | */ |
2623 | ||
2624 | static const struct ata_timing ata_timing[] = { | |
2625 | ||
2626 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
2627 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
2628 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
2629 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
2630 | ||
b352e57d AC |
2631 | { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, |
2632 | { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, | |
452503f9 AC |
2633 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, |
2634 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
2635 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, | |
2636 | ||
2637 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
2e9edbf8 | 2638 | |
452503f9 AC |
2639 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, |
2640 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, | |
2641 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, | |
2e9edbf8 | 2642 | |
452503f9 AC |
2643 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, |
2644 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, | |
2645 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, | |
2646 | ||
b352e57d AC |
2647 | { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, |
2648 | { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, | |
452503f9 AC |
2649 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, |
2650 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, | |
2651 | ||
2652 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, | |
2653 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, | |
2654 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, | |
2655 | ||
2656 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ | |
2657 | ||
2658 | { 0xFF } | |
2659 | }; | |
2660 | ||
2661 | #define ENOUGH(v,unit) (((v)-1)/(unit)+1) | |
2662 | #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) | |
2663 | ||
2664 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
2665 | { | |
2666 | q->setup = EZ(t->setup * 1000, T); | |
2667 | q->act8b = EZ(t->act8b * 1000, T); | |
2668 | q->rec8b = EZ(t->rec8b * 1000, T); | |
2669 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
2670 | q->active = EZ(t->active * 1000, T); | |
2671 | q->recover = EZ(t->recover * 1000, T); | |
2672 | q->cycle = EZ(t->cycle * 1000, T); | |
2673 | q->udma = EZ(t->udma * 1000, UT); | |
2674 | } | |
2675 | ||
2676 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
2677 | struct ata_timing *m, unsigned int what) | |
2678 | { | |
2679 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
2680 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
2681 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
2682 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
2683 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
2684 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
2685 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); | |
2686 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
2687 | } | |
2688 | ||
2689 | static const struct ata_timing* ata_timing_find_mode(unsigned short speed) | |
2690 | { | |
2691 | const struct ata_timing *t; | |
2692 | ||
2693 | for (t = ata_timing; t->mode != speed; t++) | |
91190758 | 2694 | if (t->mode == 0xFF) |
452503f9 | 2695 | return NULL; |
2e9edbf8 | 2696 | return t; |
452503f9 AC |
2697 | } |
2698 | ||
2699 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
2700 | struct ata_timing *t, int T, int UT) | |
2701 | { | |
2702 | const struct ata_timing *s; | |
2703 | struct ata_timing p; | |
2704 | ||
2705 | /* | |
2e9edbf8 | 2706 | * Find the mode. |
75b1f2f8 | 2707 | */ |
452503f9 AC |
2708 | |
2709 | if (!(s = ata_timing_find_mode(speed))) | |
2710 | return -EINVAL; | |
2711 | ||
75b1f2f8 AL |
2712 | memcpy(t, s, sizeof(*s)); |
2713 | ||
452503f9 AC |
2714 | /* |
2715 | * If the drive is an EIDE drive, it can tell us it needs extended | |
2716 | * PIO/MW_DMA cycle timing. | |
2717 | */ | |
2718 | ||
2719 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ | |
2720 | memset(&p, 0, sizeof(p)); | |
2721 | if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { | |
2722 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; | |
2723 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; | |
2724 | } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { | |
2725 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; | |
2726 | } | |
2727 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); | |
2728 | } | |
2729 | ||
2730 | /* | |
2731 | * Convert the timing to bus clock counts. | |
2732 | */ | |
2733 | ||
75b1f2f8 | 2734 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
2735 | |
2736 | /* | |
c893a3ae RD |
2737 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
2738 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
2739 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
2740 | */ |
2741 | ||
fd3367af | 2742 | if (speed > XFER_PIO_6) { |
452503f9 AC |
2743 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
2744 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
2745 | } | |
2746 | ||
2747 | /* | |
c893a3ae | 2748 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
2749 | */ |
2750 | ||
2751 | if (t->act8b + t->rec8b < t->cyc8b) { | |
2752 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
2753 | t->rec8b = t->cyc8b - t->act8b; | |
2754 | } | |
2755 | ||
2756 | if (t->active + t->recover < t->cycle) { | |
2757 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
2758 | t->recover = t->cycle - t->active; | |
2759 | } | |
a617c09f | 2760 | |
4f701d1e AC |
2761 | /* In a few cases quantisation may produce enough errors to |
2762 | leave t->cycle too low for the sum of active and recovery | |
2763 | if so we must correct this */ | |
2764 | if (t->active + t->recover > t->cycle) | |
2765 | t->cycle = t->active + t->recover; | |
452503f9 AC |
2766 | |
2767 | return 0; | |
2768 | } | |
2769 | ||
cf176e1a TH |
2770 | /** |
2771 | * ata_down_xfermask_limit - adjust dev xfer masks downward | |
cf176e1a | 2772 | * @dev: Device to adjust xfer masks |
458337db | 2773 | * @sel: ATA_DNXFER_* selector |
cf176e1a TH |
2774 | * |
2775 | * Adjust xfer masks of @dev downward. Note that this function | |
2776 | * does not apply the change. Invoking ata_set_mode() afterwards | |
2777 | * will apply the limit. | |
2778 | * | |
2779 | * LOCKING: | |
2780 | * Inherited from caller. | |
2781 | * | |
2782 | * RETURNS: | |
2783 | * 0 on success, negative errno on failure | |
2784 | */ | |
458337db | 2785 | int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
cf176e1a | 2786 | { |
458337db TH |
2787 | char buf[32]; |
2788 | unsigned int orig_mask, xfer_mask; | |
2789 | unsigned int pio_mask, mwdma_mask, udma_mask; | |
2790 | int quiet, highbit; | |
cf176e1a | 2791 | |
458337db TH |
2792 | quiet = !!(sel & ATA_DNXFER_QUIET); |
2793 | sel &= ~ATA_DNXFER_QUIET; | |
cf176e1a | 2794 | |
458337db TH |
2795 | xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
2796 | dev->mwdma_mask, | |
2797 | dev->udma_mask); | |
2798 | ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); | |
cf176e1a | 2799 | |
458337db TH |
2800 | switch (sel) { |
2801 | case ATA_DNXFER_PIO: | |
2802 | highbit = fls(pio_mask) - 1; | |
2803 | pio_mask &= ~(1 << highbit); | |
2804 | break; | |
2805 | ||
2806 | case ATA_DNXFER_DMA: | |
2807 | if (udma_mask) { | |
2808 | highbit = fls(udma_mask) - 1; | |
2809 | udma_mask &= ~(1 << highbit); | |
2810 | if (!udma_mask) | |
2811 | return -ENOENT; | |
2812 | } else if (mwdma_mask) { | |
2813 | highbit = fls(mwdma_mask) - 1; | |
2814 | mwdma_mask &= ~(1 << highbit); | |
2815 | if (!mwdma_mask) | |
2816 | return -ENOENT; | |
2817 | } | |
2818 | break; | |
2819 | ||
2820 | case ATA_DNXFER_40C: | |
2821 | udma_mask &= ATA_UDMA_MASK_40C; | |
2822 | break; | |
2823 | ||
2824 | case ATA_DNXFER_FORCE_PIO0: | |
2825 | pio_mask &= 1; | |
2826 | case ATA_DNXFER_FORCE_PIO: | |
2827 | mwdma_mask = 0; | |
2828 | udma_mask = 0; | |
2829 | break; | |
2830 | ||
458337db TH |
2831 | default: |
2832 | BUG(); | |
2833 | } | |
2834 | ||
2835 | xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
2836 | ||
2837 | if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) | |
2838 | return -ENOENT; | |
2839 | ||
2840 | if (!quiet) { | |
2841 | if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) | |
2842 | snprintf(buf, sizeof(buf), "%s:%s", | |
2843 | ata_mode_string(xfer_mask), | |
2844 | ata_mode_string(xfer_mask & ATA_MASK_PIO)); | |
2845 | else | |
2846 | snprintf(buf, sizeof(buf), "%s", | |
2847 | ata_mode_string(xfer_mask)); | |
2848 | ||
2849 | ata_dev_printk(dev, KERN_WARNING, | |
2850 | "limiting speed to %s\n", buf); | |
2851 | } | |
cf176e1a TH |
2852 | |
2853 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, | |
2854 | &dev->udma_mask); | |
2855 | ||
cf176e1a | 2856 | return 0; |
cf176e1a TH |
2857 | } |
2858 | ||
3373efd8 | 2859 | static int ata_dev_set_mode(struct ata_device *dev) |
1da177e4 | 2860 | { |
9af5c9c9 | 2861 | struct ata_eh_context *ehc = &dev->link->eh_context; |
83206a29 TH |
2862 | unsigned int err_mask; |
2863 | int rc; | |
1da177e4 | 2864 | |
e8384607 | 2865 | dev->flags &= ~ATA_DFLAG_PIO; |
1da177e4 LT |
2866 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
2867 | dev->flags |= ATA_DFLAG_PIO; | |
2868 | ||
3373efd8 | 2869 | err_mask = ata_dev_set_xfermode(dev); |
11750a40 A |
2870 | /* Old CFA may refuse this command, which is just fine */ |
2871 | if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) | |
2872 | err_mask &= ~AC_ERR_DEV; | |
0bc2a79a AC |
2873 | /* Some very old devices and some bad newer ones fail any kind of |
2874 | SET_XFERMODE request but support PIO0-2 timings and no IORDY */ | |
2875 | if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) && | |
2876 | dev->pio_mode <= XFER_PIO_2) | |
2877 | err_mask &= ~AC_ERR_DEV; | |
83206a29 | 2878 | if (err_mask) { |
f15a1daf TH |
2879 | ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " |
2880 | "(err_mask=0x%x)\n", err_mask); | |
83206a29 TH |
2881 | return -EIO; |
2882 | } | |
1da177e4 | 2883 | |
baa1e78a | 2884 | ehc->i.flags |= ATA_EHI_POST_SETMODE; |
422c9daa | 2885 | rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); |
baa1e78a | 2886 | ehc->i.flags &= ~ATA_EHI_POST_SETMODE; |
5eb45c02 | 2887 | if (rc) |
83206a29 | 2888 | return rc; |
48a8a14f | 2889 | |
23e71c3d TH |
2890 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
2891 | dev->xfer_shift, (int)dev->xfer_mode); | |
1da177e4 | 2892 | |
f15a1daf TH |
2893 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", |
2894 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); | |
83206a29 | 2895 | return 0; |
1da177e4 LT |
2896 | } |
2897 | ||
1da177e4 | 2898 | /** |
04351821 | 2899 | * ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
0260731f | 2900 | * @link: link on which timings will be programmed |
e82cbdb9 | 2901 | * @r_failed_dev: out paramter for failed device |
1da177e4 | 2902 | * |
04351821 A |
2903 | * Standard implementation of the function used to tune and set |
2904 | * ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
2905 | * ata_dev_set_mode() fails, pointer to the failing device is | |
e82cbdb9 | 2906 | * returned in @r_failed_dev. |
780a87f7 | 2907 | * |
1da177e4 | 2908 | * LOCKING: |
0cba632b | 2909 | * PCI/etc. bus probe sem. |
e82cbdb9 TH |
2910 | * |
2911 | * RETURNS: | |
2912 | * 0 on success, negative errno otherwise | |
1da177e4 | 2913 | */ |
04351821 | 2914 | |
0260731f | 2915 | int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
1da177e4 | 2916 | { |
0260731f | 2917 | struct ata_port *ap = link->ap; |
e8e0619f | 2918 | struct ata_device *dev; |
f58229f8 | 2919 | int rc = 0, used_dma = 0, found = 0; |
3adcebb2 | 2920 | |
a6d5a51c | 2921 | /* step 1: calculate xfer_mask */ |
f58229f8 | 2922 | ata_link_for_each_dev(dev, link) { |
acf356b1 | 2923 | unsigned int pio_mask, dma_mask; |
b3a70601 | 2924 | unsigned int mode_mask; |
a6d5a51c | 2925 | |
e1211e3f | 2926 | if (!ata_dev_enabled(dev)) |
a6d5a51c TH |
2927 | continue; |
2928 | ||
b3a70601 AC |
2929 | mode_mask = ATA_DMA_MASK_ATA; |
2930 | if (dev->class == ATA_DEV_ATAPI) | |
2931 | mode_mask = ATA_DMA_MASK_ATAPI; | |
2932 | else if (ata_id_is_cfa(dev->id)) | |
2933 | mode_mask = ATA_DMA_MASK_CFA; | |
2934 | ||
3373efd8 | 2935 | ata_dev_xfermask(dev); |
1da177e4 | 2936 | |
acf356b1 TH |
2937 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
2938 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
b3a70601 AC |
2939 | |
2940 | if (libata_dma_mask & mode_mask) | |
2941 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
2942 | else | |
2943 | dma_mask = 0; | |
2944 | ||
acf356b1 TH |
2945 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); |
2946 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
5444a6f4 | 2947 | |
4f65977d | 2948 | found = 1; |
5444a6f4 AC |
2949 | if (dev->dma_mode) |
2950 | used_dma = 1; | |
a6d5a51c | 2951 | } |
4f65977d | 2952 | if (!found) |
e82cbdb9 | 2953 | goto out; |
a6d5a51c TH |
2954 | |
2955 | /* step 2: always set host PIO timings */ | |
f58229f8 | 2956 | ata_link_for_each_dev(dev, link) { |
e8e0619f TH |
2957 | if (!ata_dev_enabled(dev)) |
2958 | continue; | |
2959 | ||
2960 | if (!dev->pio_mode) { | |
f15a1daf | 2961 | ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); |
e8e0619f | 2962 | rc = -EINVAL; |
e82cbdb9 | 2963 | goto out; |
e8e0619f TH |
2964 | } |
2965 | ||
2966 | dev->xfer_mode = dev->pio_mode; | |
2967 | dev->xfer_shift = ATA_SHIFT_PIO; | |
2968 | if (ap->ops->set_piomode) | |
2969 | ap->ops->set_piomode(ap, dev); | |
2970 | } | |
1da177e4 | 2971 | |
a6d5a51c | 2972 | /* step 3: set host DMA timings */ |
f58229f8 | 2973 | ata_link_for_each_dev(dev, link) { |
e8e0619f TH |
2974 | if (!ata_dev_enabled(dev) || !dev->dma_mode) |
2975 | continue; | |
2976 | ||
2977 | dev->xfer_mode = dev->dma_mode; | |
2978 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
2979 | if (ap->ops->set_dmamode) | |
2980 | ap->ops->set_dmamode(ap, dev); | |
2981 | } | |
1da177e4 LT |
2982 | |
2983 | /* step 4: update devices' xfer mode */ | |
f58229f8 | 2984 | ata_link_for_each_dev(dev, link) { |
18d90deb | 2985 | /* don't update suspended devices' xfer mode */ |
9666f400 | 2986 | if (!ata_dev_enabled(dev)) |
83206a29 TH |
2987 | continue; |
2988 | ||
3373efd8 | 2989 | rc = ata_dev_set_mode(dev); |
5bbc53f4 | 2990 | if (rc) |
e82cbdb9 | 2991 | goto out; |
83206a29 | 2992 | } |
1da177e4 | 2993 | |
e8e0619f TH |
2994 | /* Record simplex status. If we selected DMA then the other |
2995 | * host channels are not permitted to do so. | |
5444a6f4 | 2996 | */ |
cca3974e | 2997 | if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
032af1ce | 2998 | ap->host->simplex_claimed = ap; |
5444a6f4 | 2999 | |
e82cbdb9 TH |
3000 | out: |
3001 | if (rc) | |
3002 | *r_failed_dev = dev; | |
3003 | return rc; | |
1da177e4 LT |
3004 | } |
3005 | ||
04351821 A |
3006 | /** |
3007 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
0260731f | 3008 | * @link: link on which timings will be programmed |
04351821 A |
3009 | * @r_failed_dev: out paramter for failed device |
3010 | * | |
3011 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3012 | * ata_set_mode() fails, pointer to the failing device is | |
3013 | * returned in @r_failed_dev. | |
3014 | * | |
3015 | * LOCKING: | |
3016 | * PCI/etc. bus probe sem. | |
3017 | * | |
3018 | * RETURNS: | |
3019 | * 0 on success, negative errno otherwise | |
3020 | */ | |
0260731f | 3021 | int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
04351821 | 3022 | { |
0260731f TH |
3023 | struct ata_port *ap = link->ap; |
3024 | ||
04351821 A |
3025 | /* has private set_mode? */ |
3026 | if (ap->ops->set_mode) | |
0260731f TH |
3027 | return ap->ops->set_mode(link, r_failed_dev); |
3028 | return ata_do_set_mode(link, r_failed_dev); | |
04351821 A |
3029 | } |
3030 | ||
1fdffbce JG |
3031 | /** |
3032 | * ata_tf_to_host - issue ATA taskfile to host controller | |
3033 | * @ap: port to which command is being issued | |
3034 | * @tf: ATA taskfile register set | |
3035 | * | |
3036 | * Issues ATA taskfile register set to ATA host controller, | |
3037 | * with proper synchronization with interrupt handler and | |
3038 | * other threads. | |
3039 | * | |
3040 | * LOCKING: | |
cca3974e | 3041 | * spin_lock_irqsave(host lock) |
1fdffbce JG |
3042 | */ |
3043 | ||
3044 | static inline void ata_tf_to_host(struct ata_port *ap, | |
3045 | const struct ata_taskfile *tf) | |
3046 | { | |
3047 | ap->ops->tf_load(ap, tf); | |
3048 | ap->ops->exec_command(ap, tf); | |
3049 | } | |
3050 | ||
1da177e4 LT |
3051 | /** |
3052 | * ata_busy_sleep - sleep until BSY clears, or timeout | |
3053 | * @ap: port containing status register to be polled | |
3054 | * @tmout_pat: impatience timeout | |
3055 | * @tmout: overall timeout | |
3056 | * | |
780a87f7 JG |
3057 | * Sleep until ATA Status register bit BSY clears, |
3058 | * or a timeout occurs. | |
3059 | * | |
d1adc1bb TH |
3060 | * LOCKING: |
3061 | * Kernel thread context (may sleep). | |
3062 | * | |
3063 | * RETURNS: | |
3064 | * 0 on success, -errno otherwise. | |
1da177e4 | 3065 | */ |
d1adc1bb TH |
3066 | int ata_busy_sleep(struct ata_port *ap, |
3067 | unsigned long tmout_pat, unsigned long tmout) | |
1da177e4 LT |
3068 | { |
3069 | unsigned long timer_start, timeout; | |
3070 | u8 status; | |
3071 | ||
3072 | status = ata_busy_wait(ap, ATA_BUSY, 300); | |
3073 | timer_start = jiffies; | |
3074 | timeout = timer_start + tmout_pat; | |
d1adc1bb TH |
3075 | while (status != 0xff && (status & ATA_BUSY) && |
3076 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
3077 | msleep(50); |
3078 | status = ata_busy_wait(ap, ATA_BUSY, 3); | |
3079 | } | |
3080 | ||
d1adc1bb | 3081 | if (status != 0xff && (status & ATA_BUSY)) |
f15a1daf | 3082 | ata_port_printk(ap, KERN_WARNING, |
35aa7a43 JG |
3083 | "port is slow to respond, please be patient " |
3084 | "(Status 0x%x)\n", status); | |
1da177e4 LT |
3085 | |
3086 | timeout = timer_start + tmout; | |
d1adc1bb TH |
3087 | while (status != 0xff && (status & ATA_BUSY) && |
3088 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
3089 | msleep(50); |
3090 | status = ata_chk_status(ap); | |
3091 | } | |
3092 | ||
d1adc1bb TH |
3093 | if (status == 0xff) |
3094 | return -ENODEV; | |
3095 | ||
1da177e4 | 3096 | if (status & ATA_BUSY) { |
f15a1daf | 3097 | ata_port_printk(ap, KERN_ERR, "port failed to respond " |
35aa7a43 JG |
3098 | "(%lu secs, Status 0x%x)\n", |
3099 | tmout / HZ, status); | |
d1adc1bb | 3100 | return -EBUSY; |
1da177e4 LT |
3101 | } |
3102 | ||
3103 | return 0; | |
3104 | } | |
3105 | ||
d4b2bab4 TH |
3106 | /** |
3107 | * ata_wait_ready - sleep until BSY clears, or timeout | |
3108 | * @ap: port containing status register to be polled | |
3109 | * @deadline: deadline jiffies for the operation | |
3110 | * | |
3111 | * Sleep until ATA Status register bit BSY clears, or timeout | |
3112 | * occurs. | |
3113 | * | |
3114 | * LOCKING: | |
3115 | * Kernel thread context (may sleep). | |
3116 | * | |
3117 | * RETURNS: | |
3118 | * 0 on success, -errno otherwise. | |
3119 | */ | |
3120 | int ata_wait_ready(struct ata_port *ap, unsigned long deadline) | |
3121 | { | |
3122 | unsigned long start = jiffies; | |
3123 | int warned = 0; | |
3124 | ||
3125 | while (1) { | |
3126 | u8 status = ata_chk_status(ap); | |
3127 | unsigned long now = jiffies; | |
3128 | ||
3129 | if (!(status & ATA_BUSY)) | |
3130 | return 0; | |
936fd732 | 3131 | if (!ata_link_online(&ap->link) && status == 0xff) |
d4b2bab4 TH |
3132 | return -ENODEV; |
3133 | if (time_after(now, deadline)) | |
3134 | return -EBUSY; | |
3135 | ||
3136 | if (!warned && time_after(now, start + 5 * HZ) && | |
3137 | (deadline - now > 3 * HZ)) { | |
3138 | ata_port_printk(ap, KERN_WARNING, | |
3139 | "port is slow to respond, please be patient " | |
3140 | "(Status 0x%x)\n", status); | |
3141 | warned = 1; | |
3142 | } | |
3143 | ||
3144 | msleep(50); | |
3145 | } | |
3146 | } | |
3147 | ||
3148 | static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask, | |
3149 | unsigned long deadline) | |
1da177e4 LT |
3150 | { |
3151 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
3152 | unsigned int dev0 = devmask & (1 << 0); | |
3153 | unsigned int dev1 = devmask & (1 << 1); | |
9b89391c | 3154 | int rc, ret = 0; |
1da177e4 LT |
3155 | |
3156 | /* if device 0 was found in ata_devchk, wait for its | |
3157 | * BSY bit to clear | |
3158 | */ | |
d4b2bab4 TH |
3159 | if (dev0) { |
3160 | rc = ata_wait_ready(ap, deadline); | |
9b89391c TH |
3161 | if (rc) { |
3162 | if (rc != -ENODEV) | |
3163 | return rc; | |
3164 | ret = rc; | |
3165 | } | |
d4b2bab4 | 3166 | } |
1da177e4 | 3167 | |
e141d999 TH |
3168 | /* if device 1 was found in ata_devchk, wait for register |
3169 | * access briefly, then wait for BSY to clear. | |
1da177e4 | 3170 | */ |
e141d999 TH |
3171 | if (dev1) { |
3172 | int i; | |
1da177e4 LT |
3173 | |
3174 | ap->ops->dev_select(ap, 1); | |
e141d999 TH |
3175 | |
3176 | /* Wait for register access. Some ATAPI devices fail | |
3177 | * to set nsect/lbal after reset, so don't waste too | |
3178 | * much time on it. We're gonna wait for !BSY anyway. | |
3179 | */ | |
3180 | for (i = 0; i < 2; i++) { | |
3181 | u8 nsect, lbal; | |
3182 | ||
3183 | nsect = ioread8(ioaddr->nsect_addr); | |
3184 | lbal = ioread8(ioaddr->lbal_addr); | |
3185 | if ((nsect == 1) && (lbal == 1)) | |
3186 | break; | |
3187 | msleep(50); /* give drive a breather */ | |
3188 | } | |
3189 | ||
d4b2bab4 | 3190 | rc = ata_wait_ready(ap, deadline); |
9b89391c TH |
3191 | if (rc) { |
3192 | if (rc != -ENODEV) | |
3193 | return rc; | |
3194 | ret = rc; | |
3195 | } | |
d4b2bab4 | 3196 | } |
1da177e4 LT |
3197 | |
3198 | /* is all this really necessary? */ | |
3199 | ap->ops->dev_select(ap, 0); | |
3200 | if (dev1) | |
3201 | ap->ops->dev_select(ap, 1); | |
3202 | if (dev0) | |
3203 | ap->ops->dev_select(ap, 0); | |
d4b2bab4 | 3204 | |
9b89391c | 3205 | return ret; |
1da177e4 LT |
3206 | } |
3207 | ||
d4b2bab4 TH |
3208 | static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask, |
3209 | unsigned long deadline) | |
1da177e4 LT |
3210 | { |
3211 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
681c80b5 AC |
3212 | struct ata_device *dev; |
3213 | int i = 0; | |
1da177e4 | 3214 | |
44877b4e | 3215 | DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); |
1da177e4 LT |
3216 | |
3217 | /* software reset. causes dev0 to be selected */ | |
0d5ff566 TH |
3218 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
3219 | udelay(20); /* FIXME: flush */ | |
3220 | iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); | |
3221 | udelay(20); /* FIXME: flush */ | |
3222 | iowrite8(ap->ctl, ioaddr->ctl_addr); | |
1da177e4 | 3223 | |
681c80b5 AC |
3224 | /* If we issued an SRST then an ATA drive (not ATAPI) |
3225 | * may have changed configuration and be in PIO0 timing. If | |
3226 | * we did a hard reset (or are coming from power on) this is | |
3227 | * true for ATA or ATAPI. Until we've set a suitable controller | |
3228 | * mode we should not touch the bus as we may be talking too fast. | |
3229 | */ | |
3230 | ||
3231 | ata_link_for_each_dev(dev, &ap->link) | |
3232 | dev->pio_mode = XFER_PIO_0; | |
3233 | ||
3234 | /* If the controller has a pio mode setup function then use | |
3235 | it to set the chipset to rights. Don't touch the DMA setup | |
3236 | as that will be dealt with when revalidating */ | |
3237 | if (ap->ops->set_piomode) { | |
3238 | ata_link_for_each_dev(dev, &ap->link) | |
3239 | if (devmask & (1 << i++)) | |
3240 | ap->ops->set_piomode(ap, dev); | |
3241 | } | |
3242 | ||
1da177e4 LT |
3243 | /* spec mandates ">= 2ms" before checking status. |
3244 | * We wait 150ms, because that was the magic delay used for | |
3245 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time | |
3246 | * between when the ATA command register is written, and then | |
3247 | * status is checked. Because waiting for "a while" before | |
3248 | * checking status is fine, post SRST, we perform this magic | |
3249 | * delay here as well. | |
09c7ad79 AC |
3250 | * |
3251 | * Old drivers/ide uses the 2mS rule and then waits for ready | |
1da177e4 LT |
3252 | */ |
3253 | msleep(150); | |
3254 | ||
2e9edbf8 | 3255 | /* Before we perform post reset processing we want to see if |
298a41ca TH |
3256 | * the bus shows 0xFF because the odd clown forgets the D7 |
3257 | * pulldown resistor. | |
3258 | */ | |
d1adc1bb | 3259 | if (ata_check_status(ap) == 0xFF) |
9b89391c | 3260 | return -ENODEV; |
09c7ad79 | 3261 | |
d4b2bab4 | 3262 | return ata_bus_post_reset(ap, devmask, deadline); |
1da177e4 LT |
3263 | } |
3264 | ||
3265 | /** | |
3266 | * ata_bus_reset - reset host port and associated ATA channel | |
3267 | * @ap: port to reset | |
3268 | * | |
3269 | * This is typically the first time we actually start issuing | |
3270 | * commands to the ATA channel. We wait for BSY to clear, then | |
3271 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its | |
3272 | * result. Determine what devices, if any, are on the channel | |
3273 | * by looking at the device 0/1 error register. Look at the signature | |
3274 | * stored in each device's taskfile registers, to determine if | |
3275 | * the device is ATA or ATAPI. | |
3276 | * | |
3277 | * LOCKING: | |
0cba632b | 3278 | * PCI/etc. bus probe sem. |
cca3974e | 3279 | * Obtains host lock. |
1da177e4 LT |
3280 | * |
3281 | * SIDE EFFECTS: | |
198e0fed | 3282 | * Sets ATA_FLAG_DISABLED if bus reset fails. |
1da177e4 LT |
3283 | */ |
3284 | ||
3285 | void ata_bus_reset(struct ata_port *ap) | |
3286 | { | |
9af5c9c9 | 3287 | struct ata_device *device = ap->link.device; |
1da177e4 LT |
3288 | struct ata_ioports *ioaddr = &ap->ioaddr; |
3289 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
3290 | u8 err; | |
aec5c3c1 | 3291 | unsigned int dev0, dev1 = 0, devmask = 0; |
9b89391c | 3292 | int rc; |
1da177e4 | 3293 | |
44877b4e | 3294 | DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no); |
1da177e4 LT |
3295 | |
3296 | /* determine if device 0/1 are present */ | |
3297 | if (ap->flags & ATA_FLAG_SATA_RESET) | |
3298 | dev0 = 1; | |
3299 | else { | |
3300 | dev0 = ata_devchk(ap, 0); | |
3301 | if (slave_possible) | |
3302 | dev1 = ata_devchk(ap, 1); | |
3303 | } | |
3304 | ||
3305 | if (dev0) | |
3306 | devmask |= (1 << 0); | |
3307 | if (dev1) | |
3308 | devmask |= (1 << 1); | |
3309 | ||
3310 | /* select device 0 again */ | |
3311 | ap->ops->dev_select(ap, 0); | |
3312 | ||
3313 | /* issue bus reset */ | |
9b89391c TH |
3314 | if (ap->flags & ATA_FLAG_SRST) { |
3315 | rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ); | |
3316 | if (rc && rc != -ENODEV) | |
aec5c3c1 | 3317 | goto err_out; |
9b89391c | 3318 | } |
1da177e4 LT |
3319 | |
3320 | /* | |
3321 | * determine by signature whether we have ATA or ATAPI devices | |
3322 | */ | |
3f19859e | 3323 | device[0].class = ata_dev_try_classify(&device[0], dev0, &err); |
1da177e4 | 3324 | if ((slave_possible) && (err != 0x81)) |
3f19859e | 3325 | device[1].class = ata_dev_try_classify(&device[1], dev1, &err); |
1da177e4 | 3326 | |
1da177e4 | 3327 | /* is double-select really necessary? */ |
9af5c9c9 | 3328 | if (device[1].class != ATA_DEV_NONE) |
1da177e4 | 3329 | ap->ops->dev_select(ap, 1); |
9af5c9c9 | 3330 | if (device[0].class != ATA_DEV_NONE) |
1da177e4 LT |
3331 | ap->ops->dev_select(ap, 0); |
3332 | ||
3333 | /* if no devices were detected, disable this port */ | |
9af5c9c9 TH |
3334 | if ((device[0].class == ATA_DEV_NONE) && |
3335 | (device[1].class == ATA_DEV_NONE)) | |
1da177e4 LT |
3336 | goto err_out; |
3337 | ||
3338 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { | |
3339 | /* set up device control for ATA_FLAG_SATA_RESET */ | |
0d5ff566 | 3340 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
1da177e4 LT |
3341 | } |
3342 | ||
3343 | DPRINTK("EXIT\n"); | |
3344 | return; | |
3345 | ||
3346 | err_out: | |
f15a1daf | 3347 | ata_port_printk(ap, KERN_ERR, "disabling port\n"); |
ac8869d5 | 3348 | ata_port_disable(ap); |
1da177e4 LT |
3349 | |
3350 | DPRINTK("EXIT\n"); | |
3351 | } | |
3352 | ||
d7bb4cc7 | 3353 | /** |
936fd732 TH |
3354 | * sata_link_debounce - debounce SATA phy status |
3355 | * @link: ATA link to debounce SATA phy status for | |
d7bb4cc7 | 3356 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3357 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3358 | * |
936fd732 | 3359 | * Make sure SStatus of @link reaches stable state, determined by |
d7bb4cc7 TH |
3360 | * holding the same value where DET is not 1 for @duration polled |
3361 | * every @interval, before @timeout. Timeout constraints the | |
d4b2bab4 TH |
3362 | * beginning of the stable state. Because DET gets stuck at 1 on |
3363 | * some controllers after hot unplugging, this functions waits | |
d7bb4cc7 TH |
3364 | * until timeout then returns 0 if DET is stable at 1. |
3365 | * | |
d4b2bab4 TH |
3366 | * @timeout is further limited by @deadline. The sooner of the |
3367 | * two is used. | |
3368 | * | |
d7bb4cc7 TH |
3369 | * LOCKING: |
3370 | * Kernel thread context (may sleep) | |
3371 | * | |
3372 | * RETURNS: | |
3373 | * 0 on success, -errno on failure. | |
3374 | */ | |
936fd732 TH |
3375 | int sata_link_debounce(struct ata_link *link, const unsigned long *params, |
3376 | unsigned long deadline) | |
7a7921e8 | 3377 | { |
d7bb4cc7 | 3378 | unsigned long interval_msec = params[0]; |
d4b2bab4 TH |
3379 | unsigned long duration = msecs_to_jiffies(params[1]); |
3380 | unsigned long last_jiffies, t; | |
d7bb4cc7 TH |
3381 | u32 last, cur; |
3382 | int rc; | |
3383 | ||
d4b2bab4 TH |
3384 | t = jiffies + msecs_to_jiffies(params[2]); |
3385 | if (time_before(t, deadline)) | |
3386 | deadline = t; | |
3387 | ||
936fd732 | 3388 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3389 | return rc; |
3390 | cur &= 0xf; | |
3391 | ||
3392 | last = cur; | |
3393 | last_jiffies = jiffies; | |
3394 | ||
3395 | while (1) { | |
3396 | msleep(interval_msec); | |
936fd732 | 3397 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3398 | return rc; |
3399 | cur &= 0xf; | |
3400 | ||
3401 | /* DET stable? */ | |
3402 | if (cur == last) { | |
d4b2bab4 | 3403 | if (cur == 1 && time_before(jiffies, deadline)) |
d7bb4cc7 TH |
3404 | continue; |
3405 | if (time_after(jiffies, last_jiffies + duration)) | |
3406 | return 0; | |
3407 | continue; | |
3408 | } | |
3409 | ||
3410 | /* unstable, start over */ | |
3411 | last = cur; | |
3412 | last_jiffies = jiffies; | |
3413 | ||
f1545154 TH |
3414 | /* Check deadline. If debouncing failed, return |
3415 | * -EPIPE to tell upper layer to lower link speed. | |
3416 | */ | |
d4b2bab4 | 3417 | if (time_after(jiffies, deadline)) |
f1545154 | 3418 | return -EPIPE; |
d7bb4cc7 TH |
3419 | } |
3420 | } | |
3421 | ||
3422 | /** | |
936fd732 TH |
3423 | * sata_link_resume - resume SATA link |
3424 | * @link: ATA link to resume SATA | |
d7bb4cc7 | 3425 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3426 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3427 | * |
936fd732 | 3428 | * Resume SATA phy @link and debounce it. |
d7bb4cc7 TH |
3429 | * |
3430 | * LOCKING: | |
3431 | * Kernel thread context (may sleep) | |
3432 | * | |
3433 | * RETURNS: | |
3434 | * 0 on success, -errno on failure. | |
3435 | */ | |
936fd732 TH |
3436 | int sata_link_resume(struct ata_link *link, const unsigned long *params, |
3437 | unsigned long deadline) | |
d7bb4cc7 TH |
3438 | { |
3439 | u32 scontrol; | |
81952c54 TH |
3440 | int rc; |
3441 | ||
936fd732 | 3442 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 3443 | return rc; |
7a7921e8 | 3444 | |
852ee16a | 3445 | scontrol = (scontrol & 0x0f0) | 0x300; |
81952c54 | 3446 | |
936fd732 | 3447 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 | 3448 | return rc; |
7a7921e8 | 3449 | |
d7bb4cc7 TH |
3450 | /* Some PHYs react badly if SStatus is pounded immediately |
3451 | * after resuming. Delay 200ms before debouncing. | |
3452 | */ | |
3453 | msleep(200); | |
7a7921e8 | 3454 | |
936fd732 | 3455 | return sata_link_debounce(link, params, deadline); |
7a7921e8 TH |
3456 | } |
3457 | ||
f5914a46 TH |
3458 | /** |
3459 | * ata_std_prereset - prepare for reset | |
cc0680a5 | 3460 | * @link: ATA link to be reset |
d4b2bab4 | 3461 | * @deadline: deadline jiffies for the operation |
f5914a46 | 3462 | * |
cc0680a5 | 3463 | * @link is about to be reset. Initialize it. Failure from |
b8cffc6a TH |
3464 | * prereset makes libata abort whole reset sequence and give up |
3465 | * that port, so prereset should be best-effort. It does its | |
3466 | * best to prepare for reset sequence but if things go wrong, it | |
3467 | * should just whine, not fail. | |
f5914a46 TH |
3468 | * |
3469 | * LOCKING: | |
3470 | * Kernel thread context (may sleep) | |
3471 | * | |
3472 | * RETURNS: | |
3473 | * 0 on success, -errno otherwise. | |
3474 | */ | |
cc0680a5 | 3475 | int ata_std_prereset(struct ata_link *link, unsigned long deadline) |
f5914a46 | 3476 | { |
cc0680a5 | 3477 | struct ata_port *ap = link->ap; |
936fd732 | 3478 | struct ata_eh_context *ehc = &link->eh_context; |
e9c83914 | 3479 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
f5914a46 TH |
3480 | int rc; |
3481 | ||
31daabda | 3482 | /* handle link resume */ |
28324304 | 3483 | if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && |
0c88758b | 3484 | (link->flags & ATA_LFLAG_HRST_TO_RESUME)) |
28324304 TH |
3485 | ehc->i.action |= ATA_EH_HARDRESET; |
3486 | ||
633273a3 TH |
3487 | /* Some PMPs don't work with only SRST, force hardreset if PMP |
3488 | * is supported. | |
3489 | */ | |
3490 | if (ap->flags & ATA_FLAG_PMP) | |
3491 | ehc->i.action |= ATA_EH_HARDRESET; | |
3492 | ||
f5914a46 TH |
3493 | /* if we're about to do hardreset, nothing more to do */ |
3494 | if (ehc->i.action & ATA_EH_HARDRESET) | |
3495 | return 0; | |
3496 | ||
936fd732 | 3497 | /* if SATA, resume link */ |
a16abc0b | 3498 | if (ap->flags & ATA_FLAG_SATA) { |
936fd732 | 3499 | rc = sata_link_resume(link, timing, deadline); |
b8cffc6a TH |
3500 | /* whine about phy resume failure but proceed */ |
3501 | if (rc && rc != -EOPNOTSUPP) | |
cc0680a5 | 3502 | ata_link_printk(link, KERN_WARNING, "failed to resume " |
f5914a46 | 3503 | "link for reset (errno=%d)\n", rc); |
f5914a46 TH |
3504 | } |
3505 | ||
3506 | /* Wait for !BSY if the controller can wait for the first D2H | |
3507 | * Reg FIS and we don't know that no device is attached. | |
3508 | */ | |
0c88758b | 3509 | if (!(link->flags & ATA_LFLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) { |
b8cffc6a | 3510 | rc = ata_wait_ready(ap, deadline); |
6dffaf61 | 3511 | if (rc && rc != -ENODEV) { |
cc0680a5 | 3512 | ata_link_printk(link, KERN_WARNING, "device not ready " |
b8cffc6a TH |
3513 | "(errno=%d), forcing hardreset\n", rc); |
3514 | ehc->i.action |= ATA_EH_HARDRESET; | |
3515 | } | |
3516 | } | |
f5914a46 TH |
3517 | |
3518 | return 0; | |
3519 | } | |
3520 | ||
c2bd5804 TH |
3521 | /** |
3522 | * ata_std_softreset - reset host port via ATA SRST | |
cc0680a5 | 3523 | * @link: ATA link to reset |
c2bd5804 | 3524 | * @classes: resulting classes of attached devices |
d4b2bab4 | 3525 | * @deadline: deadline jiffies for the operation |
c2bd5804 | 3526 | * |
52783c5d | 3527 | * Reset host port using ATA SRST. |
c2bd5804 TH |
3528 | * |
3529 | * LOCKING: | |
3530 | * Kernel thread context (may sleep) | |
3531 | * | |
3532 | * RETURNS: | |
3533 | * 0 on success, -errno otherwise. | |
3534 | */ | |
cc0680a5 | 3535 | int ata_std_softreset(struct ata_link *link, unsigned int *classes, |
d4b2bab4 | 3536 | unsigned long deadline) |
c2bd5804 | 3537 | { |
cc0680a5 | 3538 | struct ata_port *ap = link->ap; |
c2bd5804 | 3539 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
d4b2bab4 TH |
3540 | unsigned int devmask = 0; |
3541 | int rc; | |
c2bd5804 TH |
3542 | u8 err; |
3543 | ||
3544 | DPRINTK("ENTER\n"); | |
3545 | ||
936fd732 | 3546 | if (ata_link_offline(link)) { |
3a39746a TH |
3547 | classes[0] = ATA_DEV_NONE; |
3548 | goto out; | |
3549 | } | |
3550 | ||
c2bd5804 TH |
3551 | /* determine if device 0/1 are present */ |
3552 | if (ata_devchk(ap, 0)) | |
3553 | devmask |= (1 << 0); | |
3554 | if (slave_possible && ata_devchk(ap, 1)) | |
3555 | devmask |= (1 << 1); | |
3556 | ||
c2bd5804 TH |
3557 | /* select device 0 again */ |
3558 | ap->ops->dev_select(ap, 0); | |
3559 | ||
3560 | /* issue bus reset */ | |
3561 | DPRINTK("about to softreset, devmask=%x\n", devmask); | |
d4b2bab4 | 3562 | rc = ata_bus_softreset(ap, devmask, deadline); |
9b89391c | 3563 | /* if link is occupied, -ENODEV too is an error */ |
936fd732 | 3564 | if (rc && (rc != -ENODEV || sata_scr_valid(link))) { |
cc0680a5 | 3565 | ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc); |
d4b2bab4 | 3566 | return rc; |
c2bd5804 TH |
3567 | } |
3568 | ||
3569 | /* determine by signature whether we have ATA or ATAPI devices */ | |
3f19859e TH |
3570 | classes[0] = ata_dev_try_classify(&link->device[0], |
3571 | devmask & (1 << 0), &err); | |
c2bd5804 | 3572 | if (slave_possible && err != 0x81) |
3f19859e TH |
3573 | classes[1] = ata_dev_try_classify(&link->device[1], |
3574 | devmask & (1 << 1), &err); | |
c2bd5804 | 3575 | |
3a39746a | 3576 | out: |
c2bd5804 TH |
3577 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
3578 | return 0; | |
3579 | } | |
3580 | ||
3581 | /** | |
cc0680a5 TH |
3582 | * sata_link_hardreset - reset link via SATA phy reset |
3583 | * @link: link to reset | |
b6103f6d | 3584 | * @timing: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3585 | * @deadline: deadline jiffies for the operation |
c2bd5804 | 3586 | * |
cc0680a5 | 3587 | * SATA phy-reset @link using DET bits of SControl register. |
c2bd5804 TH |
3588 | * |
3589 | * LOCKING: | |
3590 | * Kernel thread context (may sleep) | |
3591 | * | |
3592 | * RETURNS: | |
3593 | * 0 on success, -errno otherwise. | |
3594 | */ | |
cc0680a5 | 3595 | int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, |
d4b2bab4 | 3596 | unsigned long deadline) |
c2bd5804 | 3597 | { |
852ee16a | 3598 | u32 scontrol; |
81952c54 | 3599 | int rc; |
852ee16a | 3600 | |
c2bd5804 TH |
3601 | DPRINTK("ENTER\n"); |
3602 | ||
936fd732 | 3603 | if (sata_set_spd_needed(link)) { |
1c3fae4d TH |
3604 | /* SATA spec says nothing about how to reconfigure |
3605 | * spd. To be on the safe side, turn off phy during | |
3606 | * reconfiguration. This works for at least ICH7 AHCI | |
3607 | * and Sil3124. | |
3608 | */ | |
936fd732 | 3609 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 3610 | goto out; |
81952c54 | 3611 | |
a34b6fc0 | 3612 | scontrol = (scontrol & 0x0f0) | 0x304; |
81952c54 | 3613 | |
936fd732 | 3614 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
b6103f6d | 3615 | goto out; |
1c3fae4d | 3616 | |
936fd732 | 3617 | sata_set_spd(link); |
1c3fae4d TH |
3618 | } |
3619 | ||
3620 | /* issue phy wake/reset */ | |
936fd732 | 3621 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 3622 | goto out; |
81952c54 | 3623 | |
852ee16a | 3624 | scontrol = (scontrol & 0x0f0) | 0x301; |
81952c54 | 3625 | |
936fd732 | 3626 | if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) |
b6103f6d | 3627 | goto out; |
c2bd5804 | 3628 | |
1c3fae4d | 3629 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
c2bd5804 TH |
3630 | * 10.4.2 says at least 1 ms. |
3631 | */ | |
3632 | msleep(1); | |
3633 | ||
936fd732 TH |
3634 | /* bring link back */ |
3635 | rc = sata_link_resume(link, timing, deadline); | |
b6103f6d TH |
3636 | out: |
3637 | DPRINTK("EXIT, rc=%d\n", rc); | |
3638 | return rc; | |
3639 | } | |
3640 | ||
3641 | /** | |
3642 | * sata_std_hardreset - reset host port via SATA phy reset | |
cc0680a5 | 3643 | * @link: link to reset |
b6103f6d | 3644 | * @class: resulting class of attached device |
d4b2bab4 | 3645 | * @deadline: deadline jiffies for the operation |
b6103f6d TH |
3646 | * |
3647 | * SATA phy-reset host port using DET bits of SControl register, | |
3648 | * wait for !BSY and classify the attached device. | |
3649 | * | |
3650 | * LOCKING: | |
3651 | * Kernel thread context (may sleep) | |
3652 | * | |
3653 | * RETURNS: | |
3654 | * 0 on success, -errno otherwise. | |
3655 | */ | |
cc0680a5 | 3656 | int sata_std_hardreset(struct ata_link *link, unsigned int *class, |
d4b2bab4 | 3657 | unsigned long deadline) |
b6103f6d | 3658 | { |
cc0680a5 | 3659 | struct ata_port *ap = link->ap; |
936fd732 | 3660 | const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); |
b6103f6d TH |
3661 | int rc; |
3662 | ||
3663 | DPRINTK("ENTER\n"); | |
3664 | ||
3665 | /* do hardreset */ | |
cc0680a5 | 3666 | rc = sata_link_hardreset(link, timing, deadline); |
b6103f6d | 3667 | if (rc) { |
cc0680a5 | 3668 | ata_link_printk(link, KERN_ERR, |
b6103f6d TH |
3669 | "COMRESET failed (errno=%d)\n", rc); |
3670 | return rc; | |
3671 | } | |
c2bd5804 | 3672 | |
c2bd5804 | 3673 | /* TODO: phy layer with polling, timeouts, etc. */ |
936fd732 | 3674 | if (ata_link_offline(link)) { |
c2bd5804 TH |
3675 | *class = ATA_DEV_NONE; |
3676 | DPRINTK("EXIT, link offline\n"); | |
3677 | return 0; | |
3678 | } | |
3679 | ||
34fee227 TH |
3680 | /* wait a while before checking status, see SRST for more info */ |
3681 | msleep(150); | |
3682 | ||
633273a3 TH |
3683 | /* If PMP is supported, we have to do follow-up SRST. Note |
3684 | * that some PMPs don't send D2H Reg FIS after hardreset at | |
3685 | * all if the first port is empty. Wait for it just for a | |
3686 | * second and request follow-up SRST. | |
3687 | */ | |
3688 | if (ap->flags & ATA_FLAG_PMP) { | |
3689 | ata_wait_ready(ap, jiffies + HZ); | |
3690 | return -EAGAIN; | |
3691 | } | |
3692 | ||
d4b2bab4 | 3693 | rc = ata_wait_ready(ap, deadline); |
9b89391c TH |
3694 | /* link occupied, -ENODEV too is an error */ |
3695 | if (rc) { | |
cc0680a5 | 3696 | ata_link_printk(link, KERN_ERR, |
d4b2bab4 TH |
3697 | "COMRESET failed (errno=%d)\n", rc); |
3698 | return rc; | |
c2bd5804 TH |
3699 | } |
3700 | ||
3a39746a TH |
3701 | ap->ops->dev_select(ap, 0); /* probably unnecessary */ |
3702 | ||
3f19859e | 3703 | *class = ata_dev_try_classify(link->device, 1, NULL); |
c2bd5804 TH |
3704 | |
3705 | DPRINTK("EXIT, class=%u\n", *class); | |
3706 | return 0; | |
3707 | } | |
3708 | ||
3709 | /** | |
3710 | * ata_std_postreset - standard postreset callback | |
cc0680a5 | 3711 | * @link: the target ata_link |
c2bd5804 TH |
3712 | * @classes: classes of attached devices |
3713 | * | |
3714 | * This function is invoked after a successful reset. Note that | |
3715 | * the device might have been reset more than once using | |
3716 | * different reset methods before postreset is invoked. | |
c2bd5804 | 3717 | * |
c2bd5804 TH |
3718 | * LOCKING: |
3719 | * Kernel thread context (may sleep) | |
3720 | */ | |
cc0680a5 | 3721 | void ata_std_postreset(struct ata_link *link, unsigned int *classes) |
c2bd5804 | 3722 | { |
cc0680a5 | 3723 | struct ata_port *ap = link->ap; |
dc2b3515 TH |
3724 | u32 serror; |
3725 | ||
c2bd5804 TH |
3726 | DPRINTK("ENTER\n"); |
3727 | ||
c2bd5804 | 3728 | /* print link status */ |
936fd732 | 3729 | sata_print_link_status(link); |
c2bd5804 | 3730 | |
dc2b3515 | 3731 | /* clear SError */ |
936fd732 TH |
3732 | if (sata_scr_read(link, SCR_ERROR, &serror) == 0) |
3733 | sata_scr_write(link, SCR_ERROR, serror); | |
dc2b3515 | 3734 | |
c2bd5804 TH |
3735 | /* is double-select really necessary? */ |
3736 | if (classes[0] != ATA_DEV_NONE) | |
3737 | ap->ops->dev_select(ap, 1); | |
3738 | if (classes[1] != ATA_DEV_NONE) | |
3739 | ap->ops->dev_select(ap, 0); | |
3740 | ||
3a39746a TH |
3741 | /* bail out if no device is present */ |
3742 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { | |
3743 | DPRINTK("EXIT, no device\n"); | |
3744 | return; | |
3745 | } | |
3746 | ||
3747 | /* set up device control */ | |
0d5ff566 TH |
3748 | if (ap->ioaddr.ctl_addr) |
3749 | iowrite8(ap->ctl, ap->ioaddr.ctl_addr); | |
c2bd5804 TH |
3750 | |
3751 | DPRINTK("EXIT\n"); | |
3752 | } | |
3753 | ||
623a3128 TH |
3754 | /** |
3755 | * ata_dev_same_device - Determine whether new ID matches configured device | |
623a3128 TH |
3756 | * @dev: device to compare against |
3757 | * @new_class: class of the new device | |
3758 | * @new_id: IDENTIFY page of the new device | |
3759 | * | |
3760 | * Compare @new_class and @new_id against @dev and determine | |
3761 | * whether @dev is the device indicated by @new_class and | |
3762 | * @new_id. | |
3763 | * | |
3764 | * LOCKING: | |
3765 | * None. | |
3766 | * | |
3767 | * RETURNS: | |
3768 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
3769 | */ | |
3373efd8 TH |
3770 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
3771 | const u16 *new_id) | |
623a3128 TH |
3772 | { |
3773 | const u16 *old_id = dev->id; | |
a0cf733b TH |
3774 | unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
3775 | unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; | |
623a3128 TH |
3776 | |
3777 | if (dev->class != new_class) { | |
f15a1daf TH |
3778 | ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", |
3779 | dev->class, new_class); | |
623a3128 TH |
3780 | return 0; |
3781 | } | |
3782 | ||
a0cf733b TH |
3783 | ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
3784 | ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); | |
3785 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); | |
3786 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); | |
623a3128 TH |
3787 | |
3788 | if (strcmp(model[0], model[1])) { | |
f15a1daf TH |
3789 | ata_dev_printk(dev, KERN_INFO, "model number mismatch " |
3790 | "'%s' != '%s'\n", model[0], model[1]); | |
623a3128 TH |
3791 | return 0; |
3792 | } | |
3793 | ||
3794 | if (strcmp(serial[0], serial[1])) { | |
f15a1daf TH |
3795 | ata_dev_printk(dev, KERN_INFO, "serial number mismatch " |
3796 | "'%s' != '%s'\n", serial[0], serial[1]); | |
623a3128 TH |
3797 | return 0; |
3798 | } | |
3799 | ||
623a3128 TH |
3800 | return 1; |
3801 | } | |
3802 | ||
3803 | /** | |
fe30911b | 3804 | * ata_dev_reread_id - Re-read IDENTIFY data |
3fae450c | 3805 | * @dev: target ATA device |
bff04647 | 3806 | * @readid_flags: read ID flags |
623a3128 TH |
3807 | * |
3808 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
3809 | * the port. | |
3810 | * | |
3811 | * LOCKING: | |
3812 | * Kernel thread context (may sleep) | |
3813 | * | |
3814 | * RETURNS: | |
3815 | * 0 on success, negative errno otherwise | |
3816 | */ | |
fe30911b | 3817 | int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) |
623a3128 | 3818 | { |
5eb45c02 | 3819 | unsigned int class = dev->class; |
9af5c9c9 | 3820 | u16 *id = (void *)dev->link->ap->sector_buf; |
623a3128 TH |
3821 | int rc; |
3822 | ||
fe635c7e | 3823 | /* read ID data */ |
bff04647 | 3824 | rc = ata_dev_read_id(dev, &class, readid_flags, id); |
623a3128 | 3825 | if (rc) |
fe30911b | 3826 | return rc; |
623a3128 TH |
3827 | |
3828 | /* is the device still there? */ | |
fe30911b TH |
3829 | if (!ata_dev_same_device(dev, class, id)) |
3830 | return -ENODEV; | |
623a3128 | 3831 | |
fe635c7e | 3832 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
fe30911b TH |
3833 | return 0; |
3834 | } | |
3835 | ||
3836 | /** | |
3837 | * ata_dev_revalidate - Revalidate ATA device | |
3838 | * @dev: device to revalidate | |
422c9daa | 3839 | * @new_class: new class code |
fe30911b TH |
3840 | * @readid_flags: read ID flags |
3841 | * | |
3842 | * Re-read IDENTIFY page, make sure @dev is still attached to the | |
3843 | * port and reconfigure it according to the new IDENTIFY page. | |
3844 | * | |
3845 | * LOCKING: | |
3846 | * Kernel thread context (may sleep) | |
3847 | * | |
3848 | * RETURNS: | |
3849 | * 0 on success, negative errno otherwise | |
3850 | */ | |
422c9daa TH |
3851 | int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, |
3852 | unsigned int readid_flags) | |
fe30911b | 3853 | { |
6ddcd3b0 | 3854 | u64 n_sectors = dev->n_sectors; |
fe30911b TH |
3855 | int rc; |
3856 | ||
3857 | if (!ata_dev_enabled(dev)) | |
3858 | return -ENODEV; | |
3859 | ||
422c9daa TH |
3860 | /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ |
3861 | if (ata_class_enabled(new_class) && | |
3862 | new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) { | |
3863 | ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n", | |
3864 | dev->class, new_class); | |
3865 | rc = -ENODEV; | |
3866 | goto fail; | |
3867 | } | |
3868 | ||
fe30911b TH |
3869 | /* re-read ID */ |
3870 | rc = ata_dev_reread_id(dev, readid_flags); | |
3871 | if (rc) | |
3872 | goto fail; | |
623a3128 TH |
3873 | |
3874 | /* configure device according to the new ID */ | |
efdaedc4 | 3875 | rc = ata_dev_configure(dev); |
6ddcd3b0 TH |
3876 | if (rc) |
3877 | goto fail; | |
3878 | ||
3879 | /* verify n_sectors hasn't changed */ | |
b54eebd6 TH |
3880 | if (dev->class == ATA_DEV_ATA && n_sectors && |
3881 | dev->n_sectors != n_sectors) { | |
6ddcd3b0 TH |
3882 | ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " |
3883 | "%llu != %llu\n", | |
3884 | (unsigned long long)n_sectors, | |
3885 | (unsigned long long)dev->n_sectors); | |
8270bec4 TH |
3886 | |
3887 | /* restore original n_sectors */ | |
3888 | dev->n_sectors = n_sectors; | |
3889 | ||
6ddcd3b0 TH |
3890 | rc = -ENODEV; |
3891 | goto fail; | |
3892 | } | |
3893 | ||
3894 | return 0; | |
623a3128 TH |
3895 | |
3896 | fail: | |
f15a1daf | 3897 | ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); |
623a3128 TH |
3898 | return rc; |
3899 | } | |
3900 | ||
6919a0a6 AC |
3901 | struct ata_blacklist_entry { |
3902 | const char *model_num; | |
3903 | const char *model_rev; | |
3904 | unsigned long horkage; | |
3905 | }; | |
3906 | ||
3907 | static const struct ata_blacklist_entry ata_device_blacklist [] = { | |
3908 | /* Devices with DMA related problems under Linux */ | |
3909 | { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, | |
3910 | { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, | |
3911 | { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, | |
3912 | { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, | |
3913 | { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, | |
3914 | { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, | |
3915 | { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, | |
3916 | { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, | |
3917 | { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, | |
3918 | { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, | |
3919 | { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, | |
3920 | { "CRD-84", NULL, ATA_HORKAGE_NODMA }, | |
3921 | { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, | |
3922 | { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, | |
3923 | { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, | |
3924 | { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, | |
3925 | { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, | |
3926 | { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, | |
3927 | { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, | |
3928 | { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, | |
3929 | { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, | |
3930 | { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, | |
3931 | { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, | |
3932 | { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, | |
3933 | { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, | |
3934 | { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, | |
6919a0a6 AC |
3935 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
3936 | { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, | |
3937 | { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA }, | |
39f19886 | 3938 | { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, |
5acd50f6 | 3939 | { "IOMEGA ZIP 250 ATAPI", NULL, ATA_HORKAGE_NODMA }, /* temporary fix */ |
39ce7128 TH |
3940 | { "IOMEGA ZIP 250 ATAPI Floppy", |
3941 | NULL, ATA_HORKAGE_NODMA }, | |
3af9a77a TH |
3942 | /* Odd clown on sil3726/4726 PMPs */ |
3943 | { "Config Disk", NULL, ATA_HORKAGE_NODMA | | |
3944 | ATA_HORKAGE_SKIP_PM }, | |
6919a0a6 | 3945 | |
18d6e9d5 | 3946 | /* Weird ATAPI devices */ |
40a1d531 | 3947 | { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, |
18d6e9d5 | 3948 | |
6919a0a6 AC |
3949 | /* Devices we expect to fail diagnostics */ |
3950 | ||
3951 | /* Devices where NCQ should be avoided */ | |
3952 | /* NCQ is slow */ | |
3953 | { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, | |
09125ea6 TH |
3954 | /* http://thread.gmane.org/gmane.linux.ide/14907 */ |
3955 | { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, | |
7acfaf30 | 3956 | /* NCQ is broken */ |
539cc7c7 | 3957 | { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, |
0e3dbc01 | 3958 | { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, |
0b0a43e0 DM |
3959 | { "HITACHI HDS7250SASUN500G*", NULL, ATA_HORKAGE_NONCQ }, |
3960 | { "HITACHI HDS7225SBSUN250G*", NULL, ATA_HORKAGE_NONCQ }, | |
da6f0ec2 | 3961 | { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, |
539cc7c7 | 3962 | |
36e337d0 RH |
3963 | /* Blacklist entries taken from Silicon Image 3124/3132 |
3964 | Windows driver .inf file - also several Linux problem reports */ | |
3965 | { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, | |
3966 | { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, | |
3967 | { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, | |
bd9c5a39 TH |
3968 | /* Drives which do spurious command completion */ |
3969 | { "HTS541680J9SA00", "SB2IC7EP", ATA_HORKAGE_NONCQ, }, | |
2f8fcebb | 3970 | { "HTS541612J9SA00", "SBDIC7JP", ATA_HORKAGE_NONCQ, }, |
70edb185 | 3971 | { "HDT722516DLA380", "V43OA96A", ATA_HORKAGE_NONCQ, }, |
e14cbfa6 | 3972 | { "Hitachi HTS541616J9SA00", "SB4OC70P", ATA_HORKAGE_NONCQ, }, |
2f8fcebb | 3973 | { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, |
7f567620 | 3974 | { "WDC WD3200AAJS-00RYA0", "12.01B01", ATA_HORKAGE_NONCQ, }, |
a520f261 | 3975 | { "FUJITSU MHV2080BH", "00840028", ATA_HORKAGE_NONCQ, }, |
7f567620 | 3976 | { "ST9120822AS", "3.CLF", ATA_HORKAGE_NONCQ, }, |
3fb6589c | 3977 | { "ST9160821AS", "3.CLF", ATA_HORKAGE_NONCQ, }, |
954bb005 | 3978 | { "ST9160821AS", "3.ALD", ATA_HORKAGE_NONCQ, }, |
7f567620 TH |
3979 | { "ST3160812AS", "3.ADJ", ATA_HORKAGE_NONCQ, }, |
3980 | { "ST980813AS", "3.ADB", ATA_HORKAGE_NONCQ, }, | |
5d6aca8d | 3981 | { "SAMSUNG HD401LJ", "ZZ100-15", ATA_HORKAGE_NONCQ, }, |
6919a0a6 | 3982 | |
16c55b03 TH |
3983 | /* devices which puke on READ_NATIVE_MAX */ |
3984 | { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, | |
3985 | { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, | |
3986 | { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, | |
3987 | { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, | |
6919a0a6 | 3988 | |
93328e11 AC |
3989 | /* Devices which report 1 sector over size HPA */ |
3990 | { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
3991 | { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
3992 | ||
6919a0a6 AC |
3993 | /* End Marker */ |
3994 | { } | |
1da177e4 | 3995 | }; |
2e9edbf8 | 3996 | |
539cc7c7 JG |
3997 | int strn_pattern_cmp(const char *patt, const char *name, int wildchar) |
3998 | { | |
3999 | const char *p; | |
4000 | int len; | |
4001 | ||
4002 | /* | |
4003 | * check for trailing wildcard: *\0 | |
4004 | */ | |
4005 | p = strchr(patt, wildchar); | |
4006 | if (p && ((*(p + 1)) == 0)) | |
4007 | len = p - patt; | |
4008 | else | |
4009 | len = strlen(name); | |
4010 | ||
4011 | return strncmp(patt, name, len); | |
4012 | } | |
4013 | ||
75683fe7 | 4014 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev) |
1da177e4 | 4015 | { |
8bfa79fc TH |
4016 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
4017 | unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; | |
6919a0a6 | 4018 | const struct ata_blacklist_entry *ad = ata_device_blacklist; |
3a778275 | 4019 | |
8bfa79fc TH |
4020 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
4021 | ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); | |
1da177e4 | 4022 | |
6919a0a6 | 4023 | while (ad->model_num) { |
539cc7c7 | 4024 | if (!strn_pattern_cmp(ad->model_num, model_num, '*')) { |
6919a0a6 AC |
4025 | if (ad->model_rev == NULL) |
4026 | return ad->horkage; | |
539cc7c7 | 4027 | if (!strn_pattern_cmp(ad->model_rev, model_rev, '*')) |
6919a0a6 | 4028 | return ad->horkage; |
f4b15fef | 4029 | } |
6919a0a6 | 4030 | ad++; |
f4b15fef | 4031 | } |
1da177e4 LT |
4032 | return 0; |
4033 | } | |
4034 | ||
6919a0a6 AC |
4035 | static int ata_dma_blacklisted(const struct ata_device *dev) |
4036 | { | |
4037 | /* We don't support polling DMA. | |
4038 | * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) | |
4039 | * if the LLDD handles only interrupts in the HSM_ST_LAST state. | |
4040 | */ | |
9af5c9c9 | 4041 | if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && |
6919a0a6 AC |
4042 | (dev->flags & ATA_DFLAG_CDB_INTR)) |
4043 | return 1; | |
75683fe7 | 4044 | return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; |
6919a0a6 AC |
4045 | } |
4046 | ||
a6d5a51c TH |
4047 | /** |
4048 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
a6d5a51c TH |
4049 | * @dev: Device to compute xfermask for |
4050 | * | |
acf356b1 TH |
4051 | * Compute supported xfermask of @dev and store it in |
4052 | * dev->*_mask. This function is responsible for applying all | |
4053 | * known limits including host controller limits, device | |
4054 | * blacklist, etc... | |
a6d5a51c TH |
4055 | * |
4056 | * LOCKING: | |
4057 | * None. | |
a6d5a51c | 4058 | */ |
3373efd8 | 4059 | static void ata_dev_xfermask(struct ata_device *dev) |
1da177e4 | 4060 | { |
9af5c9c9 TH |
4061 | struct ata_link *link = dev->link; |
4062 | struct ata_port *ap = link->ap; | |
cca3974e | 4063 | struct ata_host *host = ap->host; |
a6d5a51c | 4064 | unsigned long xfer_mask; |
1da177e4 | 4065 | |
37deecb5 | 4066 | /* controller modes available */ |
565083e1 TH |
4067 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
4068 | ap->mwdma_mask, ap->udma_mask); | |
4069 | ||
8343f889 | 4070 | /* drive modes available */ |
37deecb5 TH |
4071 | xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
4072 | dev->mwdma_mask, dev->udma_mask); | |
4073 | xfer_mask &= ata_id_xfermask(dev->id); | |
565083e1 | 4074 | |
b352e57d AC |
4075 | /* |
4076 | * CFA Advanced TrueIDE timings are not allowed on a shared | |
4077 | * cable | |
4078 | */ | |
4079 | if (ata_dev_pair(dev)) { | |
4080 | /* No PIO5 or PIO6 */ | |
4081 | xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); | |
4082 | /* No MWDMA3 or MWDMA 4 */ | |
4083 | xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); | |
4084 | } | |
4085 | ||
37deecb5 TH |
4086 | if (ata_dma_blacklisted(dev)) { |
4087 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
f15a1daf TH |
4088 | ata_dev_printk(dev, KERN_WARNING, |
4089 | "device is on DMA blacklist, disabling DMA\n"); | |
37deecb5 | 4090 | } |
a6d5a51c | 4091 | |
14d66ab7 PV |
4092 | if ((host->flags & ATA_HOST_SIMPLEX) && |
4093 | host->simplex_claimed && host->simplex_claimed != ap) { | |
37deecb5 TH |
4094 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
4095 | ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " | |
4096 | "other device, disabling DMA\n"); | |
5444a6f4 | 4097 | } |
565083e1 | 4098 | |
e424675f JG |
4099 | if (ap->flags & ATA_FLAG_NO_IORDY) |
4100 | xfer_mask &= ata_pio_mask_no_iordy(dev); | |
4101 | ||
5444a6f4 | 4102 | if (ap->ops->mode_filter) |
a76b62ca | 4103 | xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
5444a6f4 | 4104 | |
8343f889 RH |
4105 | /* Apply cable rule here. Don't apply it early because when |
4106 | * we handle hot plug the cable type can itself change. | |
4107 | * Check this last so that we know if the transfer rate was | |
4108 | * solely limited by the cable. | |
4109 | * Unknown or 80 wire cables reported host side are checked | |
4110 | * drive side as well. Cases where we know a 40wire cable | |
4111 | * is used safely for 80 are not checked here. | |
4112 | */ | |
4113 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) | |
4114 | /* UDMA/44 or higher would be available */ | |
4115 | if((ap->cbl == ATA_CBL_PATA40) || | |
4116 | (ata_drive_40wire(dev->id) && | |
4117 | (ap->cbl == ATA_CBL_PATA_UNK || | |
4118 | ap->cbl == ATA_CBL_PATA80))) { | |
4119 | ata_dev_printk(dev, KERN_WARNING, | |
4120 | "limited to UDMA/33 due to 40-wire cable\n"); | |
4121 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); | |
4122 | } | |
4123 | ||
565083e1 TH |
4124 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
4125 | &dev->mwdma_mask, &dev->udma_mask); | |
1da177e4 LT |
4126 | } |
4127 | ||
1da177e4 LT |
4128 | /** |
4129 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
1da177e4 LT |
4130 | * @dev: Device to which command will be sent |
4131 | * | |
780a87f7 JG |
4132 | * Issue SET FEATURES - XFER MODE command to device @dev |
4133 | * on port @ap. | |
4134 | * | |
1da177e4 | 4135 | * LOCKING: |
0cba632b | 4136 | * PCI/etc. bus probe sem. |
83206a29 TH |
4137 | * |
4138 | * RETURNS: | |
4139 | * 0 on success, AC_ERR_* mask otherwise. | |
1da177e4 LT |
4140 | */ |
4141 | ||
3373efd8 | 4142 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
1da177e4 | 4143 | { |
a0123703 | 4144 | struct ata_taskfile tf; |
83206a29 | 4145 | unsigned int err_mask; |
1da177e4 LT |
4146 | |
4147 | /* set up set-features taskfile */ | |
4148 | DPRINTK("set features - xfer mode\n"); | |
4149 | ||
464cf177 TH |
4150 | /* Some controllers and ATAPI devices show flaky interrupt |
4151 | * behavior after setting xfer mode. Use polling instead. | |
4152 | */ | |
3373efd8 | 4153 | ata_tf_init(dev, &tf); |
a0123703 TH |
4154 | tf.command = ATA_CMD_SET_FEATURES; |
4155 | tf.feature = SETFEATURES_XFER; | |
464cf177 | 4156 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; |
a0123703 TH |
4157 | tf.protocol = ATA_PROT_NODATA; |
4158 | tf.nsect = dev->xfer_mode; | |
1da177e4 | 4159 | |
3373efd8 | 4160 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
9f45cbd3 KCA |
4161 | |
4162 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
4163 | return err_mask; | |
4164 | } | |
4165 | ||
4166 | /** | |
4167 | * ata_dev_set_AN - Issue SET FEATURES - SATA FEATURES | |
4168 | * @dev: Device to which command will be sent | |
4169 | * @enable: Whether to enable or disable the feature | |
4170 | * | |
4171 | * Issue SET FEATURES - SATA FEATURES command to device @dev | |
4172 | * on port @ap with sector count set to indicate Asynchronous | |
4173 | * Notification feature | |
4174 | * | |
4175 | * LOCKING: | |
4176 | * PCI/etc. bus probe sem. | |
4177 | * | |
4178 | * RETURNS: | |
4179 | * 0 on success, AC_ERR_* mask otherwise. | |
4180 | */ | |
4181 | static unsigned int ata_dev_set_AN(struct ata_device *dev, u8 enable) | |
4182 | { | |
4183 | struct ata_taskfile tf; | |
4184 | unsigned int err_mask; | |
4185 | ||
4186 | /* set up set-features taskfile */ | |
4187 | DPRINTK("set features - SATA features\n"); | |
4188 | ||
4189 | ata_tf_init(dev, &tf); | |
4190 | tf.command = ATA_CMD_SET_FEATURES; | |
4191 | tf.feature = enable; | |
4192 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4193 | tf.protocol = ATA_PROT_NODATA; | |
4194 | tf.nsect = SATA_AN; | |
4195 | ||
4196 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); | |
1da177e4 | 4197 | |
83206a29 TH |
4198 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4199 | return err_mask; | |
1da177e4 LT |
4200 | } |
4201 | ||
8bf62ece AL |
4202 | /** |
4203 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
8bf62ece | 4204 | * @dev: Device to which command will be sent |
e2a7f77a RD |
4205 | * @heads: Number of heads (taskfile parameter) |
4206 | * @sectors: Number of sectors (taskfile parameter) | |
8bf62ece AL |
4207 | * |
4208 | * LOCKING: | |
6aff8f1f TH |
4209 | * Kernel thread context (may sleep) |
4210 | * | |
4211 | * RETURNS: | |
4212 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece | 4213 | */ |
3373efd8 TH |
4214 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
4215 | u16 heads, u16 sectors) | |
8bf62ece | 4216 | { |
a0123703 | 4217 | struct ata_taskfile tf; |
6aff8f1f | 4218 | unsigned int err_mask; |
8bf62ece AL |
4219 | |
4220 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
4221 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
00b6f5e9 | 4222 | return AC_ERR_INVALID; |
8bf62ece AL |
4223 | |
4224 | /* set up init dev params taskfile */ | |
4225 | DPRINTK("init dev params \n"); | |
4226 | ||
3373efd8 | 4227 | ata_tf_init(dev, &tf); |
a0123703 TH |
4228 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
4229 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4230 | tf.protocol = ATA_PROT_NODATA; | |
4231 | tf.nsect = sectors; | |
4232 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 4233 | |
3373efd8 | 4234 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
18b2466c AC |
4235 | /* A clean abort indicates an original or just out of spec drive |
4236 | and we should continue as we issue the setup based on the | |
4237 | drive reported working geometry */ | |
4238 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
4239 | err_mask = 0; | |
8bf62ece | 4240 | |
6aff8f1f TH |
4241 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4242 | return err_mask; | |
8bf62ece AL |
4243 | } |
4244 | ||
1da177e4 | 4245 | /** |
0cba632b JG |
4246 | * ata_sg_clean - Unmap DMA memory associated with command |
4247 | * @qc: Command containing DMA memory to be released | |
4248 | * | |
4249 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
4250 | * |
4251 | * LOCKING: | |
cca3974e | 4252 | * spin_lock_irqsave(host lock) |
1da177e4 | 4253 | */ |
70e6ad0c | 4254 | void ata_sg_clean(struct ata_queued_cmd *qc) |
1da177e4 LT |
4255 | { |
4256 | struct ata_port *ap = qc->ap; | |
cedc9a47 | 4257 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 4258 | int dir = qc->dma_dir; |
cedc9a47 | 4259 | void *pad_buf = NULL; |
1da177e4 | 4260 | |
a4631474 TH |
4261 | WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); |
4262 | WARN_ON(sg == NULL); | |
1da177e4 LT |
4263 | |
4264 | if (qc->flags & ATA_QCFLAG_SINGLE) | |
f131883e | 4265 | WARN_ON(qc->n_elem > 1); |
1da177e4 | 4266 | |
2c13b7ce | 4267 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 4268 | |
cedc9a47 JG |
4269 | /* if we padded the buffer out to 32-bit bound, and data |
4270 | * xfer direction is from-device, we must copy from the | |
4271 | * pad buffer back into the supplied buffer | |
4272 | */ | |
4273 | if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) | |
4274 | pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
4275 | ||
4276 | if (qc->flags & ATA_QCFLAG_SG) { | |
e1410f2d | 4277 | if (qc->n_elem) |
2f1f610b | 4278 | dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); |
cedc9a47 JG |
4279 | /* restore last sg */ |
4280 | sg[qc->orig_n_elem - 1].length += qc->pad_len; | |
4281 | if (pad_buf) { | |
4282 | struct scatterlist *psg = &qc->pad_sgent; | |
4283 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
4284 | memcpy(addr + psg->offset, pad_buf, qc->pad_len); | |
dfa15988 | 4285 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
4286 | } |
4287 | } else { | |
2e242fa9 | 4288 | if (qc->n_elem) |
2f1f610b | 4289 | dma_unmap_single(ap->dev, |
e1410f2d JG |
4290 | sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), |
4291 | dir); | |
cedc9a47 JG |
4292 | /* restore sg */ |
4293 | sg->length += qc->pad_len; | |
4294 | if (pad_buf) | |
4295 | memcpy(qc->buf_virt + sg->length - qc->pad_len, | |
4296 | pad_buf, qc->pad_len); | |
4297 | } | |
1da177e4 LT |
4298 | |
4299 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
cedc9a47 | 4300 | qc->__sg = NULL; |
1da177e4 LT |
4301 | } |
4302 | ||
4303 | /** | |
4304 | * ata_fill_sg - Fill PCI IDE PRD table | |
4305 | * @qc: Metadata associated with taskfile to be transferred | |
4306 | * | |
780a87f7 JG |
4307 | * Fill PCI IDE PRD (scatter-gather) table with segments |
4308 | * associated with the current disk command. | |
4309 | * | |
1da177e4 | 4310 | * LOCKING: |
cca3974e | 4311 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4312 | * |
4313 | */ | |
4314 | static void ata_fill_sg(struct ata_queued_cmd *qc) | |
4315 | { | |
1da177e4 | 4316 | struct ata_port *ap = qc->ap; |
cedc9a47 JG |
4317 | struct scatterlist *sg; |
4318 | unsigned int idx; | |
1da177e4 | 4319 | |
a4631474 | 4320 | WARN_ON(qc->__sg == NULL); |
f131883e | 4321 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); |
1da177e4 LT |
4322 | |
4323 | idx = 0; | |
cedc9a47 | 4324 | ata_for_each_sg(sg, qc) { |
1da177e4 LT |
4325 | u32 addr, offset; |
4326 | u32 sg_len, len; | |
4327 | ||
4328 | /* determine if physical DMA addr spans 64K boundary. | |
4329 | * Note h/w doesn't support 64-bit, so we unconditionally | |
4330 | * truncate dma_addr_t to u32. | |
4331 | */ | |
4332 | addr = (u32) sg_dma_address(sg); | |
4333 | sg_len = sg_dma_len(sg); | |
4334 | ||
4335 | while (sg_len) { | |
4336 | offset = addr & 0xffff; | |
4337 | len = sg_len; | |
4338 | if ((offset + sg_len) > 0x10000) | |
4339 | len = 0x10000 - offset; | |
4340 | ||
4341 | ap->prd[idx].addr = cpu_to_le32(addr); | |
4342 | ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); | |
4343 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); | |
4344 | ||
4345 | idx++; | |
4346 | sg_len -= len; | |
4347 | addr += len; | |
4348 | } | |
4349 | } | |
4350 | ||
4351 | if (idx) | |
4352 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
4353 | } | |
b9a4197e | 4354 | |
d26fc955 AC |
4355 | /** |
4356 | * ata_fill_sg_dumb - Fill PCI IDE PRD table | |
4357 | * @qc: Metadata associated with taskfile to be transferred | |
4358 | * | |
4359 | * Fill PCI IDE PRD (scatter-gather) table with segments | |
4360 | * associated with the current disk command. Perform the fill | |
4361 | * so that we avoid writing any length 64K records for | |
4362 | * controllers that don't follow the spec. | |
4363 | * | |
4364 | * LOCKING: | |
4365 | * spin_lock_irqsave(host lock) | |
4366 | * | |
4367 | */ | |
4368 | static void ata_fill_sg_dumb(struct ata_queued_cmd *qc) | |
4369 | { | |
4370 | struct ata_port *ap = qc->ap; | |
4371 | struct scatterlist *sg; | |
4372 | unsigned int idx; | |
4373 | ||
4374 | WARN_ON(qc->__sg == NULL); | |
4375 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); | |
4376 | ||
4377 | idx = 0; | |
4378 | ata_for_each_sg(sg, qc) { | |
4379 | u32 addr, offset; | |
4380 | u32 sg_len, len, blen; | |
4381 | ||
4382 | /* determine if physical DMA addr spans 64K boundary. | |
4383 | * Note h/w doesn't support 64-bit, so we unconditionally | |
4384 | * truncate dma_addr_t to u32. | |
4385 | */ | |
4386 | addr = (u32) sg_dma_address(sg); | |
4387 | sg_len = sg_dma_len(sg); | |
4388 | ||
4389 | while (sg_len) { | |
4390 | offset = addr & 0xffff; | |
4391 | len = sg_len; | |
4392 | if ((offset + sg_len) > 0x10000) | |
4393 | len = 0x10000 - offset; | |
4394 | ||
4395 | blen = len & 0xffff; | |
4396 | ap->prd[idx].addr = cpu_to_le32(addr); | |
4397 | if (blen == 0) { | |
4398 | /* Some PATA chipsets like the CS5530 can't | |
4399 | cope with 0x0000 meaning 64K as the spec says */ | |
4400 | ap->prd[idx].flags_len = cpu_to_le32(0x8000); | |
4401 | blen = 0x8000; | |
4402 | ap->prd[++idx].addr = cpu_to_le32(addr + 0x8000); | |
4403 | } | |
4404 | ap->prd[idx].flags_len = cpu_to_le32(blen); | |
4405 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); | |
4406 | ||
4407 | idx++; | |
4408 | sg_len -= len; | |
4409 | addr += len; | |
4410 | } | |
4411 | } | |
4412 | ||
4413 | if (idx) | |
4414 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
4415 | } | |
4416 | ||
1da177e4 LT |
4417 | /** |
4418 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported | |
4419 | * @qc: Metadata associated with taskfile to check | |
4420 | * | |
780a87f7 JG |
4421 | * Allow low-level driver to filter ATA PACKET commands, returning |
4422 | * a status indicating whether or not it is OK to use DMA for the | |
4423 | * supplied PACKET command. | |
4424 | * | |
1da177e4 | 4425 | * LOCKING: |
cca3974e | 4426 | * spin_lock_irqsave(host lock) |
0cba632b | 4427 | * |
1da177e4 LT |
4428 | * RETURNS: 0 when ATAPI DMA can be used |
4429 | * nonzero otherwise | |
4430 | */ | |
4431 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) | |
4432 | { | |
4433 | struct ata_port *ap = qc->ap; | |
b9a4197e TH |
4434 | |
4435 | /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a | |
4436 | * few ATAPI devices choke on such DMA requests. | |
4437 | */ | |
4438 | if (unlikely(qc->nbytes & 15)) | |
4439 | return 1; | |
6f23a31d | 4440 | |
1da177e4 | 4441 | if (ap->ops->check_atapi_dma) |
b9a4197e | 4442 | return ap->ops->check_atapi_dma(qc); |
1da177e4 | 4443 | |
b9a4197e | 4444 | return 0; |
1da177e4 | 4445 | } |
b9a4197e | 4446 | |
31cc23b3 TH |
4447 | /** |
4448 | * ata_std_qc_defer - Check whether a qc needs to be deferred | |
4449 | * @qc: ATA command in question | |
4450 | * | |
4451 | * Non-NCQ commands cannot run with any other command, NCQ or | |
4452 | * not. As upper layer only knows the queue depth, we are | |
4453 | * responsible for maintaining exclusion. This function checks | |
4454 | * whether a new command @qc can be issued. | |
4455 | * | |
4456 | * LOCKING: | |
4457 | * spin_lock_irqsave(host lock) | |
4458 | * | |
4459 | * RETURNS: | |
4460 | * ATA_DEFER_* if deferring is needed, 0 otherwise. | |
4461 | */ | |
4462 | int ata_std_qc_defer(struct ata_queued_cmd *qc) | |
4463 | { | |
4464 | struct ata_link *link = qc->dev->link; | |
4465 | ||
4466 | if (qc->tf.protocol == ATA_PROT_NCQ) { | |
4467 | if (!ata_tag_valid(link->active_tag)) | |
4468 | return 0; | |
4469 | } else { | |
4470 | if (!ata_tag_valid(link->active_tag) && !link->sactive) | |
4471 | return 0; | |
4472 | } | |
4473 | ||
4474 | return ATA_DEFER_LINK; | |
4475 | } | |
4476 | ||
1da177e4 LT |
4477 | /** |
4478 | * ata_qc_prep - Prepare taskfile for submission | |
4479 | * @qc: Metadata associated with taskfile to be prepared | |
4480 | * | |
780a87f7 JG |
4481 | * Prepare ATA taskfile for submission. |
4482 | * | |
1da177e4 | 4483 | * LOCKING: |
cca3974e | 4484 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4485 | */ |
4486 | void ata_qc_prep(struct ata_queued_cmd *qc) | |
4487 | { | |
4488 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4489 | return; | |
4490 | ||
4491 | ata_fill_sg(qc); | |
4492 | } | |
4493 | ||
d26fc955 AC |
4494 | /** |
4495 | * ata_dumb_qc_prep - Prepare taskfile for submission | |
4496 | * @qc: Metadata associated with taskfile to be prepared | |
4497 | * | |
4498 | * Prepare ATA taskfile for submission. | |
4499 | * | |
4500 | * LOCKING: | |
4501 | * spin_lock_irqsave(host lock) | |
4502 | */ | |
4503 | void ata_dumb_qc_prep(struct ata_queued_cmd *qc) | |
4504 | { | |
4505 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4506 | return; | |
4507 | ||
4508 | ata_fill_sg_dumb(qc); | |
4509 | } | |
4510 | ||
e46834cd BK |
4511 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
4512 | ||
0cba632b JG |
4513 | /** |
4514 | * ata_sg_init_one - Associate command with memory buffer | |
4515 | * @qc: Command to be associated | |
4516 | * @buf: Memory buffer | |
4517 | * @buflen: Length of memory buffer, in bytes. | |
4518 | * | |
4519 | * Initialize the data-related elements of queued_cmd @qc | |
4520 | * to point to a single memory buffer, @buf of byte length @buflen. | |
4521 | * | |
4522 | * LOCKING: | |
cca3974e | 4523 | * spin_lock_irqsave(host lock) |
0cba632b JG |
4524 | */ |
4525 | ||
1da177e4 LT |
4526 | void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) |
4527 | { | |
1da177e4 LT |
4528 | qc->flags |= ATA_QCFLAG_SINGLE; |
4529 | ||
cedc9a47 | 4530 | qc->__sg = &qc->sgent; |
1da177e4 | 4531 | qc->n_elem = 1; |
cedc9a47 | 4532 | qc->orig_n_elem = 1; |
1da177e4 | 4533 | qc->buf_virt = buf; |
233277ca | 4534 | qc->nbytes = buflen; |
1da177e4 | 4535 | |
61c0596c | 4536 | sg_init_one(&qc->sgent, buf, buflen); |
1da177e4 LT |
4537 | } |
4538 | ||
0cba632b JG |
4539 | /** |
4540 | * ata_sg_init - Associate command with scatter-gather table. | |
4541 | * @qc: Command to be associated | |
4542 | * @sg: Scatter-gather table. | |
4543 | * @n_elem: Number of elements in s/g table. | |
4544 | * | |
4545 | * Initialize the data-related elements of queued_cmd @qc | |
4546 | * to point to a scatter-gather table @sg, containing @n_elem | |
4547 | * elements. | |
4548 | * | |
4549 | * LOCKING: | |
cca3974e | 4550 | * spin_lock_irqsave(host lock) |
0cba632b JG |
4551 | */ |
4552 | ||
1da177e4 LT |
4553 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
4554 | unsigned int n_elem) | |
4555 | { | |
4556 | qc->flags |= ATA_QCFLAG_SG; | |
cedc9a47 | 4557 | qc->__sg = sg; |
1da177e4 | 4558 | qc->n_elem = n_elem; |
cedc9a47 | 4559 | qc->orig_n_elem = n_elem; |
1da177e4 LT |
4560 | } |
4561 | ||
4562 | /** | |
0cba632b JG |
4563 | * ata_sg_setup_one - DMA-map the memory buffer associated with a command. |
4564 | * @qc: Command with memory buffer to be mapped. | |
4565 | * | |
4566 | * DMA-map the memory buffer associated with queued_cmd @qc. | |
1da177e4 LT |
4567 | * |
4568 | * LOCKING: | |
cca3974e | 4569 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4570 | * |
4571 | * RETURNS: | |
0cba632b | 4572 | * Zero on success, negative on error. |
1da177e4 LT |
4573 | */ |
4574 | ||
4575 | static int ata_sg_setup_one(struct ata_queued_cmd *qc) | |
4576 | { | |
4577 | struct ata_port *ap = qc->ap; | |
4578 | int dir = qc->dma_dir; | |
cedc9a47 | 4579 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 4580 | dma_addr_t dma_address; |
2e242fa9 | 4581 | int trim_sg = 0; |
1da177e4 | 4582 | |
cedc9a47 JG |
4583 | /* we must lengthen transfers to end on a 32-bit boundary */ |
4584 | qc->pad_len = sg->length & 3; | |
4585 | if (qc->pad_len) { | |
4586 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
4587 | struct scatterlist *psg = &qc->pad_sgent; | |
4588 | ||
a4631474 | 4589 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
4590 | |
4591 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
4592 | ||
4593 | if (qc->tf.flags & ATA_TFLAG_WRITE) | |
4594 | memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, | |
4595 | qc->pad_len); | |
4596 | ||
4597 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
4598 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
4599 | /* trim sg */ | |
4600 | sg->length -= qc->pad_len; | |
2e242fa9 TH |
4601 | if (sg->length == 0) |
4602 | trim_sg = 1; | |
cedc9a47 JG |
4603 | |
4604 | DPRINTK("padding done, sg->length=%u pad_len=%u\n", | |
4605 | sg->length, qc->pad_len); | |
4606 | } | |
4607 | ||
2e242fa9 TH |
4608 | if (trim_sg) { |
4609 | qc->n_elem--; | |
e1410f2d JG |
4610 | goto skip_map; |
4611 | } | |
4612 | ||
2f1f610b | 4613 | dma_address = dma_map_single(ap->dev, qc->buf_virt, |
32529e01 | 4614 | sg->length, dir); |
537a95d9 TH |
4615 | if (dma_mapping_error(dma_address)) { |
4616 | /* restore sg */ | |
4617 | sg->length += qc->pad_len; | |
1da177e4 | 4618 | return -1; |
537a95d9 | 4619 | } |
1da177e4 LT |
4620 | |
4621 | sg_dma_address(sg) = dma_address; | |
32529e01 | 4622 | sg_dma_len(sg) = sg->length; |
1da177e4 | 4623 | |
2e242fa9 | 4624 | skip_map: |
1da177e4 LT |
4625 | DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), |
4626 | qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
4627 | ||
4628 | return 0; | |
4629 | } | |
4630 | ||
4631 | /** | |
0cba632b JG |
4632 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
4633 | * @qc: Command with scatter-gather table to be mapped. | |
4634 | * | |
4635 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
1da177e4 LT |
4636 | * |
4637 | * LOCKING: | |
cca3974e | 4638 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4639 | * |
4640 | * RETURNS: | |
0cba632b | 4641 | * Zero on success, negative on error. |
1da177e4 LT |
4642 | * |
4643 | */ | |
4644 | ||
4645 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
4646 | { | |
4647 | struct ata_port *ap = qc->ap; | |
cedc9a47 JG |
4648 | struct scatterlist *sg = qc->__sg; |
4649 | struct scatterlist *lsg = &sg[qc->n_elem - 1]; | |
e1410f2d | 4650 | int n_elem, pre_n_elem, dir, trim_sg = 0; |
1da177e4 | 4651 | |
44877b4e | 4652 | VPRINTK("ENTER, ata%u\n", ap->print_id); |
a4631474 | 4653 | WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); |
1da177e4 | 4654 | |
cedc9a47 JG |
4655 | /* we must lengthen transfers to end on a 32-bit boundary */ |
4656 | qc->pad_len = lsg->length & 3; | |
4657 | if (qc->pad_len) { | |
4658 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
4659 | struct scatterlist *psg = &qc->pad_sgent; | |
4660 | unsigned int offset; | |
4661 | ||
a4631474 | 4662 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
4663 | |
4664 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
4665 | ||
4666 | /* | |
4667 | * psg->page/offset are used to copy to-be-written | |
4668 | * data in this function or read data in ata_sg_clean. | |
4669 | */ | |
4670 | offset = lsg->offset + lsg->length - qc->pad_len; | |
4671 | psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); | |
4672 | psg->offset = offset_in_page(offset); | |
4673 | ||
4674 | if (qc->tf.flags & ATA_TFLAG_WRITE) { | |
4675 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
4676 | memcpy(pad_buf, addr + psg->offset, qc->pad_len); | |
dfa15988 | 4677 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
4678 | } |
4679 | ||
4680 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
4681 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
4682 | /* trim last sg */ | |
4683 | lsg->length -= qc->pad_len; | |
e1410f2d JG |
4684 | if (lsg->length == 0) |
4685 | trim_sg = 1; | |
cedc9a47 JG |
4686 | |
4687 | DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", | |
4688 | qc->n_elem - 1, lsg->length, qc->pad_len); | |
4689 | } | |
4690 | ||
e1410f2d JG |
4691 | pre_n_elem = qc->n_elem; |
4692 | if (trim_sg && pre_n_elem) | |
4693 | pre_n_elem--; | |
4694 | ||
4695 | if (!pre_n_elem) { | |
4696 | n_elem = 0; | |
4697 | goto skip_map; | |
4698 | } | |
4699 | ||
1da177e4 | 4700 | dir = qc->dma_dir; |
2f1f610b | 4701 | n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); |
537a95d9 TH |
4702 | if (n_elem < 1) { |
4703 | /* restore last sg */ | |
4704 | lsg->length += qc->pad_len; | |
1da177e4 | 4705 | return -1; |
537a95d9 | 4706 | } |
1da177e4 LT |
4707 | |
4708 | DPRINTK("%d sg elements mapped\n", n_elem); | |
4709 | ||
e1410f2d | 4710 | skip_map: |
1da177e4 LT |
4711 | qc->n_elem = n_elem; |
4712 | ||
4713 | return 0; | |
4714 | } | |
4715 | ||
0baab86b | 4716 | /** |
c893a3ae | 4717 | * swap_buf_le16 - swap halves of 16-bit words in place |
0baab86b EF |
4718 | * @buf: Buffer to swap |
4719 | * @buf_words: Number of 16-bit words in buffer. | |
4720 | * | |
4721 | * Swap halves of 16-bit words if needed to convert from | |
4722 | * little-endian byte order to native cpu byte order, or | |
4723 | * vice-versa. | |
4724 | * | |
4725 | * LOCKING: | |
6f0ef4fa | 4726 | * Inherited from caller. |
0baab86b | 4727 | */ |
1da177e4 LT |
4728 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
4729 | { | |
4730 | #ifdef __BIG_ENDIAN | |
4731 | unsigned int i; | |
4732 | ||
4733 | for (i = 0; i < buf_words; i++) | |
4734 | buf[i] = le16_to_cpu(buf[i]); | |
4735 | #endif /* __BIG_ENDIAN */ | |
4736 | } | |
4737 | ||
6ae4cfb5 | 4738 | /** |
0d5ff566 | 4739 | * ata_data_xfer - Transfer data by PIO |
a6b2c5d4 | 4740 | * @adev: device to target |
6ae4cfb5 AL |
4741 | * @buf: data buffer |
4742 | * @buflen: buffer length | |
344babaa | 4743 | * @write_data: read/write |
6ae4cfb5 AL |
4744 | * |
4745 | * Transfer data from/to the device data register by PIO. | |
4746 | * | |
4747 | * LOCKING: | |
4748 | * Inherited from caller. | |
6ae4cfb5 | 4749 | */ |
0d5ff566 TH |
4750 | void ata_data_xfer(struct ata_device *adev, unsigned char *buf, |
4751 | unsigned int buflen, int write_data) | |
1da177e4 | 4752 | { |
9af5c9c9 | 4753 | struct ata_port *ap = adev->link->ap; |
6ae4cfb5 | 4754 | unsigned int words = buflen >> 1; |
1da177e4 | 4755 | |
6ae4cfb5 | 4756 | /* Transfer multiple of 2 bytes */ |
1da177e4 | 4757 | if (write_data) |
0d5ff566 | 4758 | iowrite16_rep(ap->ioaddr.data_addr, buf, words); |
1da177e4 | 4759 | else |
0d5ff566 | 4760 | ioread16_rep(ap->ioaddr.data_addr, buf, words); |
6ae4cfb5 AL |
4761 | |
4762 | /* Transfer trailing 1 byte, if any. */ | |
4763 | if (unlikely(buflen & 0x01)) { | |
4764 | u16 align_buf[1] = { 0 }; | |
4765 | unsigned char *trailing_buf = buf + buflen - 1; | |
4766 | ||
4767 | if (write_data) { | |
4768 | memcpy(align_buf, trailing_buf, 1); | |
0d5ff566 | 4769 | iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); |
6ae4cfb5 | 4770 | } else { |
0d5ff566 | 4771 | align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr)); |
6ae4cfb5 AL |
4772 | memcpy(trailing_buf, align_buf, 1); |
4773 | } | |
4774 | } | |
1da177e4 LT |
4775 | } |
4776 | ||
75e99585 | 4777 | /** |
0d5ff566 | 4778 | * ata_data_xfer_noirq - Transfer data by PIO |
75e99585 AC |
4779 | * @adev: device to target |
4780 | * @buf: data buffer | |
4781 | * @buflen: buffer length | |
4782 | * @write_data: read/write | |
4783 | * | |
88574551 | 4784 | * Transfer data from/to the device data register by PIO. Do the |
75e99585 AC |
4785 | * transfer with interrupts disabled. |
4786 | * | |
4787 | * LOCKING: | |
4788 | * Inherited from caller. | |
4789 | */ | |
0d5ff566 TH |
4790 | void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, |
4791 | unsigned int buflen, int write_data) | |
75e99585 AC |
4792 | { |
4793 | unsigned long flags; | |
4794 | local_irq_save(flags); | |
0d5ff566 | 4795 | ata_data_xfer(adev, buf, buflen, write_data); |
75e99585 AC |
4796 | local_irq_restore(flags); |
4797 | } | |
4798 | ||
4799 | ||
6ae4cfb5 | 4800 | /** |
5a5dbd18 | 4801 | * ata_pio_sector - Transfer a sector of data. |
6ae4cfb5 AL |
4802 | * @qc: Command on going |
4803 | * | |
5a5dbd18 | 4804 | * Transfer qc->sect_size bytes of data from/to the ATA device. |
6ae4cfb5 AL |
4805 | * |
4806 | * LOCKING: | |
4807 | * Inherited from caller. | |
4808 | */ | |
4809 | ||
1da177e4 LT |
4810 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
4811 | { | |
4812 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 4813 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
4814 | struct ata_port *ap = qc->ap; |
4815 | struct page *page; | |
4816 | unsigned int offset; | |
4817 | unsigned char *buf; | |
4818 | ||
5a5dbd18 | 4819 | if (qc->curbytes == qc->nbytes - qc->sect_size) |
14be71f4 | 4820 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
4821 | |
4822 | page = sg[qc->cursg].page; | |
726f0785 | 4823 | offset = sg[qc->cursg].offset + qc->cursg_ofs; |
1da177e4 LT |
4824 | |
4825 | /* get the current page and offset */ | |
4826 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
4827 | offset %= PAGE_SIZE; | |
4828 | ||
1da177e4 LT |
4829 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
4830 | ||
91b8b313 AL |
4831 | if (PageHighMem(page)) { |
4832 | unsigned long flags; | |
4833 | ||
a6b2c5d4 | 4834 | /* FIXME: use a bounce buffer */ |
91b8b313 AL |
4835 | local_irq_save(flags); |
4836 | buf = kmap_atomic(page, KM_IRQ0); | |
083958d3 | 4837 | |
91b8b313 | 4838 | /* do the actual data transfer */ |
5a5dbd18 | 4839 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); |
1da177e4 | 4840 | |
91b8b313 AL |
4841 | kunmap_atomic(buf, KM_IRQ0); |
4842 | local_irq_restore(flags); | |
4843 | } else { | |
4844 | buf = page_address(page); | |
5a5dbd18 | 4845 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); |
91b8b313 | 4846 | } |
1da177e4 | 4847 | |
5a5dbd18 ML |
4848 | qc->curbytes += qc->sect_size; |
4849 | qc->cursg_ofs += qc->sect_size; | |
1da177e4 | 4850 | |
726f0785 | 4851 | if (qc->cursg_ofs == (&sg[qc->cursg])->length) { |
1da177e4 LT |
4852 | qc->cursg++; |
4853 | qc->cursg_ofs = 0; | |
4854 | } | |
1da177e4 | 4855 | } |
1da177e4 | 4856 | |
07f6f7d0 | 4857 | /** |
5a5dbd18 | 4858 | * ata_pio_sectors - Transfer one or many sectors. |
07f6f7d0 AL |
4859 | * @qc: Command on going |
4860 | * | |
5a5dbd18 | 4861 | * Transfer one or many sectors of data from/to the |
07f6f7d0 AL |
4862 | * ATA device for the DRQ request. |
4863 | * | |
4864 | * LOCKING: | |
4865 | * Inherited from caller. | |
4866 | */ | |
1da177e4 | 4867 | |
07f6f7d0 AL |
4868 | static void ata_pio_sectors(struct ata_queued_cmd *qc) |
4869 | { | |
4870 | if (is_multi_taskfile(&qc->tf)) { | |
4871 | /* READ/WRITE MULTIPLE */ | |
4872 | unsigned int nsect; | |
4873 | ||
587005de | 4874 | WARN_ON(qc->dev->multi_count == 0); |
1da177e4 | 4875 | |
5a5dbd18 | 4876 | nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, |
726f0785 | 4877 | qc->dev->multi_count); |
07f6f7d0 AL |
4878 | while (nsect--) |
4879 | ata_pio_sector(qc); | |
4880 | } else | |
4881 | ata_pio_sector(qc); | |
4cc980b3 AL |
4882 | |
4883 | ata_altstatus(qc->ap); /* flush */ | |
07f6f7d0 AL |
4884 | } |
4885 | ||
c71c1857 AL |
4886 | /** |
4887 | * atapi_send_cdb - Write CDB bytes to hardware | |
4888 | * @ap: Port to which ATAPI device is attached. | |
4889 | * @qc: Taskfile currently active | |
4890 | * | |
4891 | * When device has indicated its readiness to accept | |
4892 | * a CDB, this function is called. Send the CDB. | |
4893 | * | |
4894 | * LOCKING: | |
4895 | * caller. | |
4896 | */ | |
4897 | ||
4898 | static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) | |
4899 | { | |
4900 | /* send SCSI cdb */ | |
4901 | DPRINTK("send cdb\n"); | |
db024d53 | 4902 | WARN_ON(qc->dev->cdb_len < 12); |
c71c1857 | 4903 | |
a6b2c5d4 | 4904 | ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); |
c71c1857 AL |
4905 | ata_altstatus(ap); /* flush */ |
4906 | ||
4907 | switch (qc->tf.protocol) { | |
4908 | case ATA_PROT_ATAPI: | |
4909 | ap->hsm_task_state = HSM_ST; | |
4910 | break; | |
4911 | case ATA_PROT_ATAPI_NODATA: | |
4912 | ap->hsm_task_state = HSM_ST_LAST; | |
4913 | break; | |
4914 | case ATA_PROT_ATAPI_DMA: | |
4915 | ap->hsm_task_state = HSM_ST_LAST; | |
4916 | /* initiate bmdma */ | |
4917 | ap->ops->bmdma_start(qc); | |
4918 | break; | |
4919 | } | |
1da177e4 LT |
4920 | } |
4921 | ||
6ae4cfb5 AL |
4922 | /** |
4923 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
4924 | * @qc: Command on going | |
4925 | * @bytes: number of bytes | |
4926 | * | |
4927 | * Transfer Transfer data from/to the ATAPI device. | |
4928 | * | |
4929 | * LOCKING: | |
4930 | * Inherited from caller. | |
4931 | * | |
4932 | */ | |
4933 | ||
1da177e4 LT |
4934 | static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
4935 | { | |
4936 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 4937 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
4938 | struct ata_port *ap = qc->ap; |
4939 | struct page *page; | |
4940 | unsigned char *buf; | |
4941 | unsigned int offset, count; | |
4942 | ||
563a6e1f | 4943 | if (qc->curbytes + bytes >= qc->nbytes) |
14be71f4 | 4944 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
4945 | |
4946 | next_sg: | |
563a6e1f | 4947 | if (unlikely(qc->cursg >= qc->n_elem)) { |
7fb6ec28 | 4948 | /* |
563a6e1f AL |
4949 | * The end of qc->sg is reached and the device expects |
4950 | * more data to transfer. In order not to overrun qc->sg | |
4951 | * and fulfill length specified in the byte count register, | |
4952 | * - for read case, discard trailing data from the device | |
4953 | * - for write case, padding zero data to the device | |
4954 | */ | |
4955 | u16 pad_buf[1] = { 0 }; | |
4956 | unsigned int words = bytes >> 1; | |
4957 | unsigned int i; | |
4958 | ||
4959 | if (words) /* warning if bytes > 1 */ | |
f15a1daf TH |
4960 | ata_dev_printk(qc->dev, KERN_WARNING, |
4961 | "%u bytes trailing data\n", bytes); | |
563a6e1f AL |
4962 | |
4963 | for (i = 0; i < words; i++) | |
a6b2c5d4 | 4964 | ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write); |
563a6e1f | 4965 | |
14be71f4 | 4966 | ap->hsm_task_state = HSM_ST_LAST; |
563a6e1f AL |
4967 | return; |
4968 | } | |
4969 | ||
cedc9a47 | 4970 | sg = &qc->__sg[qc->cursg]; |
1da177e4 | 4971 | |
1da177e4 LT |
4972 | page = sg->page; |
4973 | offset = sg->offset + qc->cursg_ofs; | |
4974 | ||
4975 | /* get the current page and offset */ | |
4976 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
4977 | offset %= PAGE_SIZE; | |
4978 | ||
6952df03 | 4979 | /* don't overrun current sg */ |
32529e01 | 4980 | count = min(sg->length - qc->cursg_ofs, bytes); |
1da177e4 LT |
4981 | |
4982 | /* don't cross page boundaries */ | |
4983 | count = min(count, (unsigned int)PAGE_SIZE - offset); | |
4984 | ||
7282aa4b AL |
4985 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
4986 | ||
91b8b313 AL |
4987 | if (PageHighMem(page)) { |
4988 | unsigned long flags; | |
4989 | ||
a6b2c5d4 | 4990 | /* FIXME: use bounce buffer */ |
91b8b313 AL |
4991 | local_irq_save(flags); |
4992 | buf = kmap_atomic(page, KM_IRQ0); | |
083958d3 | 4993 | |
91b8b313 | 4994 | /* do the actual data transfer */ |
a6b2c5d4 | 4995 | ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); |
7282aa4b | 4996 | |
91b8b313 AL |
4997 | kunmap_atomic(buf, KM_IRQ0); |
4998 | local_irq_restore(flags); | |
4999 | } else { | |
5000 | buf = page_address(page); | |
a6b2c5d4 | 5001 | ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); |
91b8b313 | 5002 | } |
1da177e4 LT |
5003 | |
5004 | bytes -= count; | |
5005 | qc->curbytes += count; | |
5006 | qc->cursg_ofs += count; | |
5007 | ||
32529e01 | 5008 | if (qc->cursg_ofs == sg->length) { |
1da177e4 LT |
5009 | qc->cursg++; |
5010 | qc->cursg_ofs = 0; | |
5011 | } | |
5012 | ||
563a6e1f | 5013 | if (bytes) |
1da177e4 | 5014 | goto next_sg; |
1da177e4 LT |
5015 | } |
5016 | ||
6ae4cfb5 AL |
5017 | /** |
5018 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
5019 | * @qc: Command on going | |
5020 | * | |
5021 | * Transfer Transfer data from/to the ATAPI device. | |
5022 | * | |
5023 | * LOCKING: | |
5024 | * Inherited from caller. | |
6ae4cfb5 AL |
5025 | */ |
5026 | ||
1da177e4 LT |
5027 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
5028 | { | |
5029 | struct ata_port *ap = qc->ap; | |
5030 | struct ata_device *dev = qc->dev; | |
5031 | unsigned int ireason, bc_lo, bc_hi, bytes; | |
5032 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
5033 | ||
eec4c3f3 AL |
5034 | /* Abuse qc->result_tf for temp storage of intermediate TF |
5035 | * here to save some kernel stack usage. | |
5036 | * For normal completion, qc->result_tf is not relevant. For | |
5037 | * error, qc->result_tf is later overwritten by ata_qc_complete(). | |
5038 | * So, the correctness of qc->result_tf is not affected. | |
5039 | */ | |
5040 | ap->ops->tf_read(ap, &qc->result_tf); | |
5041 | ireason = qc->result_tf.nsect; | |
5042 | bc_lo = qc->result_tf.lbam; | |
5043 | bc_hi = qc->result_tf.lbah; | |
1da177e4 LT |
5044 | bytes = (bc_hi << 8) | bc_lo; |
5045 | ||
5046 | /* shall be cleared to zero, indicating xfer of data */ | |
5047 | if (ireason & (1 << 0)) | |
5048 | goto err_out; | |
5049 | ||
5050 | /* make sure transfer direction matches expected */ | |
5051 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; | |
5052 | if (do_write != i_write) | |
5053 | goto err_out; | |
5054 | ||
44877b4e | 5055 | VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); |
312f7da2 | 5056 | |
1da177e4 | 5057 | __atapi_pio_bytes(qc, bytes); |
4cc980b3 | 5058 | ata_altstatus(ap); /* flush */ |
1da177e4 LT |
5059 | |
5060 | return; | |
5061 | ||
5062 | err_out: | |
f15a1daf | 5063 | ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); |
11a56d24 | 5064 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 5065 | ap->hsm_task_state = HSM_ST_ERR; |
1da177e4 LT |
5066 | } |
5067 | ||
5068 | /** | |
c234fb00 AL |
5069 | * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. |
5070 | * @ap: the target ata_port | |
5071 | * @qc: qc on going | |
1da177e4 | 5072 | * |
c234fb00 AL |
5073 | * RETURNS: |
5074 | * 1 if ok in workqueue, 0 otherwise. | |
1da177e4 | 5075 | */ |
c234fb00 AL |
5076 | |
5077 | static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) | |
1da177e4 | 5078 | { |
c234fb00 AL |
5079 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
5080 | return 1; | |
1da177e4 | 5081 | |
c234fb00 AL |
5082 | if (ap->hsm_task_state == HSM_ST_FIRST) { |
5083 | if (qc->tf.protocol == ATA_PROT_PIO && | |
5084 | (qc->tf.flags & ATA_TFLAG_WRITE)) | |
5085 | return 1; | |
1da177e4 | 5086 | |
c234fb00 AL |
5087 | if (is_atapi_taskfile(&qc->tf) && |
5088 | !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
5089 | return 1; | |
fe79e683 AL |
5090 | } |
5091 | ||
c234fb00 AL |
5092 | return 0; |
5093 | } | |
1da177e4 | 5094 | |
c17ea20d TH |
5095 | /** |
5096 | * ata_hsm_qc_complete - finish a qc running on standard HSM | |
5097 | * @qc: Command to complete | |
5098 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
5099 | * | |
5100 | * Finish @qc which is running on standard HSM. | |
5101 | * | |
5102 | * LOCKING: | |
cca3974e | 5103 | * If @in_wq is zero, spin_lock_irqsave(host lock). |
c17ea20d TH |
5104 | * Otherwise, none on entry and grabs host lock. |
5105 | */ | |
5106 | static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) | |
5107 | { | |
5108 | struct ata_port *ap = qc->ap; | |
5109 | unsigned long flags; | |
5110 | ||
5111 | if (ap->ops->error_handler) { | |
5112 | if (in_wq) { | |
ba6a1308 | 5113 | spin_lock_irqsave(ap->lock, flags); |
c17ea20d | 5114 | |
cca3974e JG |
5115 | /* EH might have kicked in while host lock is |
5116 | * released. | |
c17ea20d TH |
5117 | */ |
5118 | qc = ata_qc_from_tag(ap, qc->tag); | |
5119 | if (qc) { | |
5120 | if (likely(!(qc->err_mask & AC_ERR_HSM))) { | |
83625006 | 5121 | ap->ops->irq_on(ap); |
c17ea20d TH |
5122 | ata_qc_complete(qc); |
5123 | } else | |
5124 | ata_port_freeze(ap); | |
5125 | } | |
5126 | ||
ba6a1308 | 5127 | spin_unlock_irqrestore(ap->lock, flags); |
c17ea20d TH |
5128 | } else { |
5129 | if (likely(!(qc->err_mask & AC_ERR_HSM))) | |
5130 | ata_qc_complete(qc); | |
5131 | else | |
5132 | ata_port_freeze(ap); | |
5133 | } | |
5134 | } else { | |
5135 | if (in_wq) { | |
ba6a1308 | 5136 | spin_lock_irqsave(ap->lock, flags); |
83625006 | 5137 | ap->ops->irq_on(ap); |
c17ea20d | 5138 | ata_qc_complete(qc); |
ba6a1308 | 5139 | spin_unlock_irqrestore(ap->lock, flags); |
c17ea20d TH |
5140 | } else |
5141 | ata_qc_complete(qc); | |
5142 | } | |
5143 | } | |
5144 | ||
bb5cb290 AL |
5145 | /** |
5146 | * ata_hsm_move - move the HSM to the next state. | |
5147 | * @ap: the target ata_port | |
5148 | * @qc: qc on going | |
5149 | * @status: current device status | |
5150 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
5151 | * | |
5152 | * RETURNS: | |
5153 | * 1 when poll next status needed, 0 otherwise. | |
5154 | */ | |
9a1004d0 TH |
5155 | int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, |
5156 | u8 status, int in_wq) | |
e2cec771 | 5157 | { |
bb5cb290 AL |
5158 | unsigned long flags = 0; |
5159 | int poll_next; | |
5160 | ||
6912ccd5 AL |
5161 | WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); |
5162 | ||
bb5cb290 AL |
5163 | /* Make sure ata_qc_issue_prot() does not throw things |
5164 | * like DMA polling into the workqueue. Notice that | |
5165 | * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). | |
5166 | */ | |
c234fb00 | 5167 | WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); |
bb5cb290 | 5168 | |
e2cec771 | 5169 | fsm_start: |
999bb6f4 | 5170 | DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", |
44877b4e | 5171 | ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); |
999bb6f4 | 5172 | |
e2cec771 AL |
5173 | switch (ap->hsm_task_state) { |
5174 | case HSM_ST_FIRST: | |
bb5cb290 AL |
5175 | /* Send first data block or PACKET CDB */ |
5176 | ||
5177 | /* If polling, we will stay in the work queue after | |
5178 | * sending the data. Otherwise, interrupt handler | |
5179 | * takes over after sending the data. | |
5180 | */ | |
5181 | poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); | |
5182 | ||
e2cec771 | 5183 | /* check device status */ |
3655d1d3 AL |
5184 | if (unlikely((status & ATA_DRQ) == 0)) { |
5185 | /* handle BSY=0, DRQ=0 as error */ | |
5186 | if (likely(status & (ATA_ERR | ATA_DF))) | |
5187 | /* device stops HSM for abort/error */ | |
5188 | qc->err_mask |= AC_ERR_DEV; | |
5189 | else | |
5190 | /* HSM violation. Let EH handle this */ | |
5191 | qc->err_mask |= AC_ERR_HSM; | |
5192 | ||
14be71f4 | 5193 | ap->hsm_task_state = HSM_ST_ERR; |
e2cec771 | 5194 | goto fsm_start; |
1da177e4 LT |
5195 | } |
5196 | ||
71601958 AL |
5197 | /* Device should not ask for data transfer (DRQ=1) |
5198 | * when it finds something wrong. | |
eee6c32f AL |
5199 | * We ignore DRQ here and stop the HSM by |
5200 | * changing hsm_task_state to HSM_ST_ERR and | |
5201 | * let the EH abort the command or reset the device. | |
71601958 AL |
5202 | */ |
5203 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
44877b4e TH |
5204 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with device " |
5205 | "error, dev_stat 0x%X\n", status); | |
3655d1d3 | 5206 | qc->err_mask |= AC_ERR_HSM; |
eee6c32f AL |
5207 | ap->hsm_task_state = HSM_ST_ERR; |
5208 | goto fsm_start; | |
71601958 | 5209 | } |
1da177e4 | 5210 | |
bb5cb290 AL |
5211 | /* Send the CDB (atapi) or the first data block (ata pio out). |
5212 | * During the state transition, interrupt handler shouldn't | |
5213 | * be invoked before the data transfer is complete and | |
5214 | * hsm_task_state is changed. Hence, the following locking. | |
5215 | */ | |
5216 | if (in_wq) | |
ba6a1308 | 5217 | spin_lock_irqsave(ap->lock, flags); |
1da177e4 | 5218 | |
bb5cb290 AL |
5219 | if (qc->tf.protocol == ATA_PROT_PIO) { |
5220 | /* PIO data out protocol. | |
5221 | * send first data block. | |
5222 | */ | |
0565c26d | 5223 | |
bb5cb290 AL |
5224 | /* ata_pio_sectors() might change the state |
5225 | * to HSM_ST_LAST. so, the state is changed here | |
5226 | * before ata_pio_sectors(). | |
5227 | */ | |
5228 | ap->hsm_task_state = HSM_ST; | |
5229 | ata_pio_sectors(qc); | |
bb5cb290 AL |
5230 | } else |
5231 | /* send CDB */ | |
5232 | atapi_send_cdb(ap, qc); | |
5233 | ||
5234 | if (in_wq) | |
ba6a1308 | 5235 | spin_unlock_irqrestore(ap->lock, flags); |
bb5cb290 AL |
5236 | |
5237 | /* if polling, ata_pio_task() handles the rest. | |
5238 | * otherwise, interrupt handler takes over from here. | |
5239 | */ | |
e2cec771 | 5240 | break; |
1c848984 | 5241 | |
e2cec771 AL |
5242 | case HSM_ST: |
5243 | /* complete command or read/write the data register */ | |
5244 | if (qc->tf.protocol == ATA_PROT_ATAPI) { | |
5245 | /* ATAPI PIO protocol */ | |
5246 | if ((status & ATA_DRQ) == 0) { | |
3655d1d3 AL |
5247 | /* No more data to transfer or device error. |
5248 | * Device error will be tagged in HSM_ST_LAST. | |
5249 | */ | |
e2cec771 AL |
5250 | ap->hsm_task_state = HSM_ST_LAST; |
5251 | goto fsm_start; | |
5252 | } | |
1da177e4 | 5253 | |
71601958 AL |
5254 | /* Device should not ask for data transfer (DRQ=1) |
5255 | * when it finds something wrong. | |
eee6c32f AL |
5256 | * We ignore DRQ here and stop the HSM by |
5257 | * changing hsm_task_state to HSM_ST_ERR and | |
5258 | * let the EH abort the command or reset the device. | |
71601958 AL |
5259 | */ |
5260 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
44877b4e TH |
5261 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " |
5262 | "device error, dev_stat 0x%X\n", | |
5263 | status); | |
3655d1d3 | 5264 | qc->err_mask |= AC_ERR_HSM; |
eee6c32f AL |
5265 | ap->hsm_task_state = HSM_ST_ERR; |
5266 | goto fsm_start; | |
71601958 | 5267 | } |
1da177e4 | 5268 | |
e2cec771 | 5269 | atapi_pio_bytes(qc); |
7fb6ec28 | 5270 | |
e2cec771 AL |
5271 | if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) |
5272 | /* bad ireason reported by device */ | |
5273 | goto fsm_start; | |
1da177e4 | 5274 | |
e2cec771 AL |
5275 | } else { |
5276 | /* ATA PIO protocol */ | |
5277 | if (unlikely((status & ATA_DRQ) == 0)) { | |
5278 | /* handle BSY=0, DRQ=0 as error */ | |
3655d1d3 AL |
5279 | if (likely(status & (ATA_ERR | ATA_DF))) |
5280 | /* device stops HSM for abort/error */ | |
5281 | qc->err_mask |= AC_ERR_DEV; | |
5282 | else | |
55a8e2c8 TH |
5283 | /* HSM violation. Let EH handle this. |
5284 | * Phantom devices also trigger this | |
5285 | * condition. Mark hint. | |
5286 | */ | |
5287 | qc->err_mask |= AC_ERR_HSM | | |
5288 | AC_ERR_NODEV_HINT; | |
3655d1d3 | 5289 | |
e2cec771 AL |
5290 | ap->hsm_task_state = HSM_ST_ERR; |
5291 | goto fsm_start; | |
5292 | } | |
1da177e4 | 5293 | |
eee6c32f AL |
5294 | /* For PIO reads, some devices may ask for |
5295 | * data transfer (DRQ=1) alone with ERR=1. | |
5296 | * We respect DRQ here and transfer one | |
5297 | * block of junk data before changing the | |
5298 | * hsm_task_state to HSM_ST_ERR. | |
5299 | * | |
5300 | * For PIO writes, ERR=1 DRQ=1 doesn't make | |
5301 | * sense since the data block has been | |
5302 | * transferred to the device. | |
71601958 AL |
5303 | */ |
5304 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
71601958 AL |
5305 | /* data might be corrputed */ |
5306 | qc->err_mask |= AC_ERR_DEV; | |
eee6c32f AL |
5307 | |
5308 | if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { | |
5309 | ata_pio_sectors(qc); | |
eee6c32f AL |
5310 | status = ata_wait_idle(ap); |
5311 | } | |
5312 | ||
3655d1d3 AL |
5313 | if (status & (ATA_BUSY | ATA_DRQ)) |
5314 | qc->err_mask |= AC_ERR_HSM; | |
5315 | ||
eee6c32f AL |
5316 | /* ata_pio_sectors() might change the |
5317 | * state to HSM_ST_LAST. so, the state | |
5318 | * is changed after ata_pio_sectors(). | |
5319 | */ | |
5320 | ap->hsm_task_state = HSM_ST_ERR; | |
5321 | goto fsm_start; | |
71601958 AL |
5322 | } |
5323 | ||
e2cec771 AL |
5324 | ata_pio_sectors(qc); |
5325 | ||
5326 | if (ap->hsm_task_state == HSM_ST_LAST && | |
5327 | (!(qc->tf.flags & ATA_TFLAG_WRITE))) { | |
5328 | /* all data read */ | |
52a32205 | 5329 | status = ata_wait_idle(ap); |
e2cec771 AL |
5330 | goto fsm_start; |
5331 | } | |
5332 | } | |
5333 | ||
bb5cb290 | 5334 | poll_next = 1; |
1da177e4 LT |
5335 | break; |
5336 | ||
14be71f4 | 5337 | case HSM_ST_LAST: |
6912ccd5 AL |
5338 | if (unlikely(!ata_ok(status))) { |
5339 | qc->err_mask |= __ac_err_mask(status); | |
e2cec771 AL |
5340 | ap->hsm_task_state = HSM_ST_ERR; |
5341 | goto fsm_start; | |
5342 | } | |
5343 | ||
5344 | /* no more data to transfer */ | |
4332a771 | 5345 | DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", |
44877b4e | 5346 | ap->print_id, qc->dev->devno, status); |
e2cec771 | 5347 | |
6912ccd5 AL |
5348 | WARN_ON(qc->err_mask); |
5349 | ||
e2cec771 | 5350 | ap->hsm_task_state = HSM_ST_IDLE; |
1da177e4 | 5351 | |
e2cec771 | 5352 | /* complete taskfile transaction */ |
c17ea20d | 5353 | ata_hsm_qc_complete(qc, in_wq); |
bb5cb290 AL |
5354 | |
5355 | poll_next = 0; | |
1da177e4 LT |
5356 | break; |
5357 | ||
14be71f4 | 5358 | case HSM_ST_ERR: |
e2cec771 AL |
5359 | /* make sure qc->err_mask is available to |
5360 | * know what's wrong and recover | |
5361 | */ | |
5362 | WARN_ON(qc->err_mask == 0); | |
5363 | ||
5364 | ap->hsm_task_state = HSM_ST_IDLE; | |
bb5cb290 | 5365 | |
999bb6f4 | 5366 | /* complete taskfile transaction */ |
c17ea20d | 5367 | ata_hsm_qc_complete(qc, in_wq); |
bb5cb290 AL |
5368 | |
5369 | poll_next = 0; | |
e2cec771 AL |
5370 | break; |
5371 | default: | |
bb5cb290 | 5372 | poll_next = 0; |
6912ccd5 | 5373 | BUG(); |
1da177e4 LT |
5374 | } |
5375 | ||
bb5cb290 | 5376 | return poll_next; |
1da177e4 LT |
5377 | } |
5378 | ||
65f27f38 | 5379 | static void ata_pio_task(struct work_struct *work) |
8061f5f0 | 5380 | { |
65f27f38 DH |
5381 | struct ata_port *ap = |
5382 | container_of(work, struct ata_port, port_task.work); | |
5383 | struct ata_queued_cmd *qc = ap->port_task_data; | |
8061f5f0 | 5384 | u8 status; |
a1af3734 | 5385 | int poll_next; |
8061f5f0 | 5386 | |
7fb6ec28 | 5387 | fsm_start: |
a1af3734 | 5388 | WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); |
8061f5f0 | 5389 | |
a1af3734 AL |
5390 | /* |
5391 | * This is purely heuristic. This is a fast path. | |
5392 | * Sometimes when we enter, BSY will be cleared in | |
5393 | * a chk-status or two. If not, the drive is probably seeking | |
5394 | * or something. Snooze for a couple msecs, then | |
5395 | * chk-status again. If still busy, queue delayed work. | |
5396 | */ | |
5397 | status = ata_busy_wait(ap, ATA_BUSY, 5); | |
5398 | if (status & ATA_BUSY) { | |
5399 | msleep(2); | |
5400 | status = ata_busy_wait(ap, ATA_BUSY, 10); | |
5401 | if (status & ATA_BUSY) { | |
31ce6dae | 5402 | ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); |
a1af3734 AL |
5403 | return; |
5404 | } | |
8061f5f0 TH |
5405 | } |
5406 | ||
a1af3734 AL |
5407 | /* move the HSM */ |
5408 | poll_next = ata_hsm_move(ap, qc, status, 1); | |
8061f5f0 | 5409 | |
a1af3734 AL |
5410 | /* another command or interrupt handler |
5411 | * may be running at this point. | |
5412 | */ | |
5413 | if (poll_next) | |
7fb6ec28 | 5414 | goto fsm_start; |
8061f5f0 TH |
5415 | } |
5416 | ||
1da177e4 LT |
5417 | /** |
5418 | * ata_qc_new - Request an available ATA command, for queueing | |
5419 | * @ap: Port associated with device @dev | |
5420 | * @dev: Device from whom we request an available command structure | |
5421 | * | |
5422 | * LOCKING: | |
0cba632b | 5423 | * None. |
1da177e4 LT |
5424 | */ |
5425 | ||
5426 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
5427 | { | |
5428 | struct ata_queued_cmd *qc = NULL; | |
5429 | unsigned int i; | |
5430 | ||
e3180499 | 5431 | /* no command while frozen */ |
b51e9e5d | 5432 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) |
e3180499 TH |
5433 | return NULL; |
5434 | ||
2ab7db1f TH |
5435 | /* the last tag is reserved for internal command. */ |
5436 | for (i = 0; i < ATA_MAX_QUEUE - 1; i++) | |
6cec4a39 | 5437 | if (!test_and_set_bit(i, &ap->qc_allocated)) { |
f69499f4 | 5438 | qc = __ata_qc_from_tag(ap, i); |
1da177e4 LT |
5439 | break; |
5440 | } | |
5441 | ||
5442 | if (qc) | |
5443 | qc->tag = i; | |
5444 | ||
5445 | return qc; | |
5446 | } | |
5447 | ||
5448 | /** | |
5449 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
1da177e4 LT |
5450 | * @dev: Device from whom we request an available command structure |
5451 | * | |
5452 | * LOCKING: | |
0cba632b | 5453 | * None. |
1da177e4 LT |
5454 | */ |
5455 | ||
3373efd8 | 5456 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) |
1da177e4 | 5457 | { |
9af5c9c9 | 5458 | struct ata_port *ap = dev->link->ap; |
1da177e4 LT |
5459 | struct ata_queued_cmd *qc; |
5460 | ||
5461 | qc = ata_qc_new(ap); | |
5462 | if (qc) { | |
1da177e4 LT |
5463 | qc->scsicmd = NULL; |
5464 | qc->ap = ap; | |
5465 | qc->dev = dev; | |
1da177e4 | 5466 | |
2c13b7ce | 5467 | ata_qc_reinit(qc); |
1da177e4 LT |
5468 | } |
5469 | ||
5470 | return qc; | |
5471 | } | |
5472 | ||
1da177e4 LT |
5473 | /** |
5474 | * ata_qc_free - free unused ata_queued_cmd | |
5475 | * @qc: Command to complete | |
5476 | * | |
5477 | * Designed to free unused ata_queued_cmd object | |
5478 | * in case something prevents using it. | |
5479 | * | |
5480 | * LOCKING: | |
cca3974e | 5481 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
5482 | */ |
5483 | void ata_qc_free(struct ata_queued_cmd *qc) | |
5484 | { | |
4ba946e9 TH |
5485 | struct ata_port *ap = qc->ap; |
5486 | unsigned int tag; | |
5487 | ||
a4631474 | 5488 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
1da177e4 | 5489 | |
4ba946e9 TH |
5490 | qc->flags = 0; |
5491 | tag = qc->tag; | |
5492 | if (likely(ata_tag_valid(tag))) { | |
4ba946e9 | 5493 | qc->tag = ATA_TAG_POISON; |
6cec4a39 | 5494 | clear_bit(tag, &ap->qc_allocated); |
4ba946e9 | 5495 | } |
1da177e4 LT |
5496 | } |
5497 | ||
76014427 | 5498 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 5499 | { |
dedaf2b0 | 5500 | struct ata_port *ap = qc->ap; |
9af5c9c9 | 5501 | struct ata_link *link = qc->dev->link; |
dedaf2b0 | 5502 | |
a4631474 TH |
5503 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
5504 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
1da177e4 LT |
5505 | |
5506 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
5507 | ata_sg_clean(qc); | |
5508 | ||
7401abf2 | 5509 | /* command should be marked inactive atomically with qc completion */ |
da917d69 | 5510 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
9af5c9c9 | 5511 | link->sactive &= ~(1 << qc->tag); |
da917d69 TH |
5512 | if (!link->sactive) |
5513 | ap->nr_active_links--; | |
5514 | } else { | |
9af5c9c9 | 5515 | link->active_tag = ATA_TAG_POISON; |
da917d69 TH |
5516 | ap->nr_active_links--; |
5517 | } | |
5518 | ||
5519 | /* clear exclusive status */ | |
5520 | if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && | |
5521 | ap->excl_link == link)) | |
5522 | ap->excl_link = NULL; | |
7401abf2 | 5523 | |
3f3791d3 AL |
5524 | /* atapi: mark qc as inactive to prevent the interrupt handler |
5525 | * from completing the command twice later, before the error handler | |
5526 | * is called. (when rc != 0 and atapi request sense is needed) | |
5527 | */ | |
5528 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
dedaf2b0 | 5529 | ap->qc_active &= ~(1 << qc->tag); |
3f3791d3 | 5530 | |
1da177e4 | 5531 | /* call completion callback */ |
77853bf2 | 5532 | qc->complete_fn(qc); |
1da177e4 LT |
5533 | } |
5534 | ||
39599a53 TH |
5535 | static void fill_result_tf(struct ata_queued_cmd *qc) |
5536 | { | |
5537 | struct ata_port *ap = qc->ap; | |
5538 | ||
39599a53 | 5539 | qc->result_tf.flags = qc->tf.flags; |
4742d54f | 5540 | ap->ops->tf_read(ap, &qc->result_tf); |
39599a53 TH |
5541 | } |
5542 | ||
f686bcb8 TH |
5543 | /** |
5544 | * ata_qc_complete - Complete an active ATA command | |
5545 | * @qc: Command to complete | |
5546 | * @err_mask: ATA Status register contents | |
5547 | * | |
5548 | * Indicate to the mid and upper layers that an ATA | |
5549 | * command has completed, with either an ok or not-ok status. | |
5550 | * | |
5551 | * LOCKING: | |
cca3974e | 5552 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
5553 | */ |
5554 | void ata_qc_complete(struct ata_queued_cmd *qc) | |
5555 | { | |
5556 | struct ata_port *ap = qc->ap; | |
5557 | ||
5558 | /* XXX: New EH and old EH use different mechanisms to | |
5559 | * synchronize EH with regular execution path. | |
5560 | * | |
5561 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. | |
5562 | * Normal execution path is responsible for not accessing a | |
5563 | * failed qc. libata core enforces the rule by returning NULL | |
5564 | * from ata_qc_from_tag() for failed qcs. | |
5565 | * | |
5566 | * Old EH depends on ata_qc_complete() nullifying completion | |
5567 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does | |
5568 | * not synchronize with interrupt handler. Only PIO task is | |
5569 | * taken care of. | |
5570 | */ | |
5571 | if (ap->ops->error_handler) { | |
b51e9e5d | 5572 | WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); |
f686bcb8 TH |
5573 | |
5574 | if (unlikely(qc->err_mask)) | |
5575 | qc->flags |= ATA_QCFLAG_FAILED; | |
5576 | ||
5577 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { | |
5578 | if (!ata_tag_internal(qc->tag)) { | |
5579 | /* always fill result TF for failed qc */ | |
39599a53 | 5580 | fill_result_tf(qc); |
f686bcb8 TH |
5581 | ata_qc_schedule_eh(qc); |
5582 | return; | |
5583 | } | |
5584 | } | |
5585 | ||
5586 | /* read result TF if requested */ | |
5587 | if (qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 5588 | fill_result_tf(qc); |
f686bcb8 TH |
5589 | |
5590 | __ata_qc_complete(qc); | |
5591 | } else { | |
5592 | if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) | |
5593 | return; | |
5594 | ||
5595 | /* read result TF if failed or requested */ | |
5596 | if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 5597 | fill_result_tf(qc); |
f686bcb8 TH |
5598 | |
5599 | __ata_qc_complete(qc); | |
5600 | } | |
5601 | } | |
5602 | ||
dedaf2b0 TH |
5603 | /** |
5604 | * ata_qc_complete_multiple - Complete multiple qcs successfully | |
5605 | * @ap: port in question | |
5606 | * @qc_active: new qc_active mask | |
5607 | * @finish_qc: LLDD callback invoked before completing a qc | |
5608 | * | |
5609 | * Complete in-flight commands. This functions is meant to be | |
5610 | * called from low-level driver's interrupt routine to complete | |
5611 | * requests normally. ap->qc_active and @qc_active is compared | |
5612 | * and commands are completed accordingly. | |
5613 | * | |
5614 | * LOCKING: | |
cca3974e | 5615 | * spin_lock_irqsave(host lock) |
dedaf2b0 TH |
5616 | * |
5617 | * RETURNS: | |
5618 | * Number of completed commands on success, -errno otherwise. | |
5619 | */ | |
5620 | int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, | |
5621 | void (*finish_qc)(struct ata_queued_cmd *)) | |
5622 | { | |
5623 | int nr_done = 0; | |
5624 | u32 done_mask; | |
5625 | int i; | |
5626 | ||
5627 | done_mask = ap->qc_active ^ qc_active; | |
5628 | ||
5629 | if (unlikely(done_mask & qc_active)) { | |
5630 | ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " | |
5631 | "(%08x->%08x)\n", ap->qc_active, qc_active); | |
5632 | return -EINVAL; | |
5633 | } | |
5634 | ||
5635 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
5636 | struct ata_queued_cmd *qc; | |
5637 | ||
5638 | if (!(done_mask & (1 << i))) | |
5639 | continue; | |
5640 | ||
5641 | if ((qc = ata_qc_from_tag(ap, i))) { | |
5642 | if (finish_qc) | |
5643 | finish_qc(qc); | |
5644 | ata_qc_complete(qc); | |
5645 | nr_done++; | |
5646 | } | |
5647 | } | |
5648 | ||
5649 | return nr_done; | |
5650 | } | |
5651 | ||
1da177e4 LT |
5652 | static inline int ata_should_dma_map(struct ata_queued_cmd *qc) |
5653 | { | |
5654 | struct ata_port *ap = qc->ap; | |
5655 | ||
5656 | switch (qc->tf.protocol) { | |
3dc1d881 | 5657 | case ATA_PROT_NCQ: |
1da177e4 LT |
5658 | case ATA_PROT_DMA: |
5659 | case ATA_PROT_ATAPI_DMA: | |
5660 | return 1; | |
5661 | ||
5662 | case ATA_PROT_ATAPI: | |
5663 | case ATA_PROT_PIO: | |
1da177e4 LT |
5664 | if (ap->flags & ATA_FLAG_PIO_DMA) |
5665 | return 1; | |
5666 | ||
5667 | /* fall through */ | |
5668 | ||
5669 | default: | |
5670 | return 0; | |
5671 | } | |
5672 | ||
5673 | /* never reached */ | |
5674 | } | |
5675 | ||
5676 | /** | |
5677 | * ata_qc_issue - issue taskfile to device | |
5678 | * @qc: command to issue to device | |
5679 | * | |
5680 | * Prepare an ATA command to submission to device. | |
5681 | * This includes mapping the data into a DMA-able | |
5682 | * area, filling in the S/G table, and finally | |
5683 | * writing the taskfile to hardware, starting the command. | |
5684 | * | |
5685 | * LOCKING: | |
cca3974e | 5686 | * spin_lock_irqsave(host lock) |
1da177e4 | 5687 | */ |
8e0e694a | 5688 | void ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
5689 | { |
5690 | struct ata_port *ap = qc->ap; | |
9af5c9c9 | 5691 | struct ata_link *link = qc->dev->link; |
1da177e4 | 5692 | |
dedaf2b0 TH |
5693 | /* Make sure only one non-NCQ command is outstanding. The |
5694 | * check is skipped for old EH because it reuses active qc to | |
5695 | * request ATAPI sense. | |
5696 | */ | |
9af5c9c9 | 5697 | WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag)); |
dedaf2b0 TH |
5698 | |
5699 | if (qc->tf.protocol == ATA_PROT_NCQ) { | |
9af5c9c9 | 5700 | WARN_ON(link->sactive & (1 << qc->tag)); |
da917d69 TH |
5701 | |
5702 | if (!link->sactive) | |
5703 | ap->nr_active_links++; | |
9af5c9c9 | 5704 | link->sactive |= 1 << qc->tag; |
dedaf2b0 | 5705 | } else { |
9af5c9c9 | 5706 | WARN_ON(link->sactive); |
da917d69 TH |
5707 | |
5708 | ap->nr_active_links++; | |
9af5c9c9 | 5709 | link->active_tag = qc->tag; |
dedaf2b0 TH |
5710 | } |
5711 | ||
e4a70e76 | 5712 | qc->flags |= ATA_QCFLAG_ACTIVE; |
dedaf2b0 | 5713 | ap->qc_active |= 1 << qc->tag; |
e4a70e76 | 5714 | |
1da177e4 LT |
5715 | if (ata_should_dma_map(qc)) { |
5716 | if (qc->flags & ATA_QCFLAG_SG) { | |
5717 | if (ata_sg_setup(qc)) | |
8e436af9 | 5718 | goto sg_err; |
1da177e4 LT |
5719 | } else if (qc->flags & ATA_QCFLAG_SINGLE) { |
5720 | if (ata_sg_setup_one(qc)) | |
8e436af9 | 5721 | goto sg_err; |
1da177e4 LT |
5722 | } |
5723 | } else { | |
5724 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
5725 | } | |
5726 | ||
5727 | ap->ops->qc_prep(qc); | |
5728 | ||
8e0e694a TH |
5729 | qc->err_mask |= ap->ops->qc_issue(qc); |
5730 | if (unlikely(qc->err_mask)) | |
5731 | goto err; | |
5732 | return; | |
1da177e4 | 5733 | |
8e436af9 TH |
5734 | sg_err: |
5735 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
8e0e694a TH |
5736 | qc->err_mask |= AC_ERR_SYSTEM; |
5737 | err: | |
5738 | ata_qc_complete(qc); | |
1da177e4 LT |
5739 | } |
5740 | ||
5741 | /** | |
5742 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner | |
5743 | * @qc: command to issue to device | |
5744 | * | |
5745 | * Using various libata functions and hooks, this function | |
5746 | * starts an ATA command. ATA commands are grouped into | |
5747 | * classes called "protocols", and issuing each type of protocol | |
5748 | * is slightly different. | |
5749 | * | |
0baab86b EF |
5750 | * May be used as the qc_issue() entry in ata_port_operations. |
5751 | * | |
1da177e4 | 5752 | * LOCKING: |
cca3974e | 5753 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
5754 | * |
5755 | * RETURNS: | |
9a3d9eb0 | 5756 | * Zero on success, AC_ERR_* mask on failure |
1da177e4 LT |
5757 | */ |
5758 | ||
9a3d9eb0 | 5759 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
1da177e4 LT |
5760 | { |
5761 | struct ata_port *ap = qc->ap; | |
5762 | ||
e50362ec AL |
5763 | /* Use polling pio if the LLD doesn't handle |
5764 | * interrupt driven pio and atapi CDB interrupt. | |
5765 | */ | |
5766 | if (ap->flags & ATA_FLAG_PIO_POLLING) { | |
5767 | switch (qc->tf.protocol) { | |
5768 | case ATA_PROT_PIO: | |
e3472cbe | 5769 | case ATA_PROT_NODATA: |
e50362ec AL |
5770 | case ATA_PROT_ATAPI: |
5771 | case ATA_PROT_ATAPI_NODATA: | |
5772 | qc->tf.flags |= ATA_TFLAG_POLLING; | |
5773 | break; | |
5774 | case ATA_PROT_ATAPI_DMA: | |
5775 | if (qc->dev->flags & ATA_DFLAG_CDB_INTR) | |
3a778275 | 5776 | /* see ata_dma_blacklisted() */ |
e50362ec AL |
5777 | BUG(); |
5778 | break; | |
5779 | default: | |
5780 | break; | |
5781 | } | |
5782 | } | |
5783 | ||
312f7da2 | 5784 | /* select the device */ |
1da177e4 LT |
5785 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
5786 | ||
312f7da2 | 5787 | /* start the command */ |
1da177e4 LT |
5788 | switch (qc->tf.protocol) { |
5789 | case ATA_PROT_NODATA: | |
312f7da2 AL |
5790 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
5791 | ata_qc_set_polling(qc); | |
5792 | ||
e5338254 | 5793 | ata_tf_to_host(ap, &qc->tf); |
312f7da2 AL |
5794 | ap->hsm_task_state = HSM_ST_LAST; |
5795 | ||
5796 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
31ce6dae | 5797 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
312f7da2 | 5798 | |
1da177e4 LT |
5799 | break; |
5800 | ||
5801 | case ATA_PROT_DMA: | |
587005de | 5802 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
312f7da2 | 5803 | |
1da177e4 LT |
5804 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
5805 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
5806 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
312f7da2 | 5807 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
5808 | break; |
5809 | ||
312f7da2 AL |
5810 | case ATA_PROT_PIO: |
5811 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
5812 | ata_qc_set_polling(qc); | |
1da177e4 | 5813 | |
e5338254 | 5814 | ata_tf_to_host(ap, &qc->tf); |
312f7da2 | 5815 | |
54f00389 AL |
5816 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
5817 | /* PIO data out protocol */ | |
5818 | ap->hsm_task_state = HSM_ST_FIRST; | |
31ce6dae | 5819 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
54f00389 AL |
5820 | |
5821 | /* always send first data block using | |
e27486db | 5822 | * the ata_pio_task() codepath. |
54f00389 | 5823 | */ |
312f7da2 | 5824 | } else { |
54f00389 AL |
5825 | /* PIO data in protocol */ |
5826 | ap->hsm_task_state = HSM_ST; | |
5827 | ||
5828 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
31ce6dae | 5829 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
54f00389 AL |
5830 | |
5831 | /* if polling, ata_pio_task() handles the rest. | |
5832 | * otherwise, interrupt handler takes over from here. | |
5833 | */ | |
312f7da2 AL |
5834 | } |
5835 | ||
1da177e4 LT |
5836 | break; |
5837 | ||
1da177e4 | 5838 | case ATA_PROT_ATAPI: |
1da177e4 | 5839 | case ATA_PROT_ATAPI_NODATA: |
312f7da2 AL |
5840 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
5841 | ata_qc_set_polling(qc); | |
5842 | ||
e5338254 | 5843 | ata_tf_to_host(ap, &qc->tf); |
f6ef65e6 | 5844 | |
312f7da2 AL |
5845 | ap->hsm_task_state = HSM_ST_FIRST; |
5846 | ||
5847 | /* send cdb by polling if no cdb interrupt */ | |
5848 | if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || | |
5849 | (qc->tf.flags & ATA_TFLAG_POLLING)) | |
31ce6dae | 5850 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
1da177e4 LT |
5851 | break; |
5852 | ||
5853 | case ATA_PROT_ATAPI_DMA: | |
587005de | 5854 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
312f7da2 | 5855 | |
1da177e4 LT |
5856 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
5857 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
312f7da2 AL |
5858 | ap->hsm_task_state = HSM_ST_FIRST; |
5859 | ||
5860 | /* send cdb by polling if no cdb interrupt */ | |
5861 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
31ce6dae | 5862 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
1da177e4 LT |
5863 | break; |
5864 | ||
5865 | default: | |
5866 | WARN_ON(1); | |
9a3d9eb0 | 5867 | return AC_ERR_SYSTEM; |
1da177e4 LT |
5868 | } |
5869 | ||
5870 | return 0; | |
5871 | } | |
5872 | ||
1da177e4 LT |
5873 | /** |
5874 | * ata_host_intr - Handle host interrupt for given (port, task) | |
5875 | * @ap: Port on which interrupt arrived (possibly...) | |
5876 | * @qc: Taskfile currently active in engine | |
5877 | * | |
5878 | * Handle host interrupt for given queued command. Currently, | |
5879 | * only DMA interrupts are handled. All other commands are | |
5880 | * handled via polling with interrupts disabled (nIEN bit). | |
5881 | * | |
5882 | * LOCKING: | |
cca3974e | 5883 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
5884 | * |
5885 | * RETURNS: | |
5886 | * One if interrupt was handled, zero if not (shared irq). | |
5887 | */ | |
5888 | ||
5889 | inline unsigned int ata_host_intr (struct ata_port *ap, | |
5890 | struct ata_queued_cmd *qc) | |
5891 | { | |
9af5c9c9 | 5892 | struct ata_eh_info *ehi = &ap->link.eh_info; |
312f7da2 | 5893 | u8 status, host_stat = 0; |
1da177e4 | 5894 | |
312f7da2 | 5895 | VPRINTK("ata%u: protocol %d task_state %d\n", |
44877b4e | 5896 | ap->print_id, qc->tf.protocol, ap->hsm_task_state); |
1da177e4 | 5897 | |
312f7da2 AL |
5898 | /* Check whether we are expecting interrupt in this state */ |
5899 | switch (ap->hsm_task_state) { | |
5900 | case HSM_ST_FIRST: | |
6912ccd5 AL |
5901 | /* Some pre-ATAPI-4 devices assert INTRQ |
5902 | * at this state when ready to receive CDB. | |
5903 | */ | |
1da177e4 | 5904 | |
312f7da2 AL |
5905 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. |
5906 | * The flag was turned on only for atapi devices. | |
5907 | * No need to check is_atapi_taskfile(&qc->tf) again. | |
5908 | */ | |
5909 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
1da177e4 | 5910 | goto idle_irq; |
1da177e4 | 5911 | break; |
312f7da2 AL |
5912 | case HSM_ST_LAST: |
5913 | if (qc->tf.protocol == ATA_PROT_DMA || | |
5914 | qc->tf.protocol == ATA_PROT_ATAPI_DMA) { | |
5915 | /* check status of DMA engine */ | |
5916 | host_stat = ap->ops->bmdma_status(ap); | |
44877b4e TH |
5917 | VPRINTK("ata%u: host_stat 0x%X\n", |
5918 | ap->print_id, host_stat); | |
312f7da2 AL |
5919 | |
5920 | /* if it's not our irq... */ | |
5921 | if (!(host_stat & ATA_DMA_INTR)) | |
5922 | goto idle_irq; | |
5923 | ||
5924 | /* before we do anything else, clear DMA-Start bit */ | |
5925 | ap->ops->bmdma_stop(qc); | |
a4f16610 AL |
5926 | |
5927 | if (unlikely(host_stat & ATA_DMA_ERR)) { | |
5928 | /* error when transfering data to/from memory */ | |
5929 | qc->err_mask |= AC_ERR_HOST_BUS; | |
5930 | ap->hsm_task_state = HSM_ST_ERR; | |
5931 | } | |
312f7da2 AL |
5932 | } |
5933 | break; | |
5934 | case HSM_ST: | |
5935 | break; | |
1da177e4 LT |
5936 | default: |
5937 | goto idle_irq; | |
5938 | } | |
5939 | ||
312f7da2 AL |
5940 | /* check altstatus */ |
5941 | status = ata_altstatus(ap); | |
5942 | if (status & ATA_BUSY) | |
5943 | goto idle_irq; | |
1da177e4 | 5944 | |
312f7da2 AL |
5945 | /* check main status, clearing INTRQ */ |
5946 | status = ata_chk_status(ap); | |
5947 | if (unlikely(status & ATA_BUSY)) | |
5948 | goto idle_irq; | |
1da177e4 | 5949 | |
312f7da2 AL |
5950 | /* ack bmdma irq events */ |
5951 | ap->ops->irq_clear(ap); | |
1da177e4 | 5952 | |
bb5cb290 | 5953 | ata_hsm_move(ap, qc, status, 0); |
ea54763f TH |
5954 | |
5955 | if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || | |
5956 | qc->tf.protocol == ATA_PROT_ATAPI_DMA)) | |
5957 | ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); | |
5958 | ||
1da177e4 LT |
5959 | return 1; /* irq handled */ |
5960 | ||
5961 | idle_irq: | |
5962 | ap->stats.idle_irq++; | |
5963 | ||
5964 | #ifdef ATA_IRQ_TRAP | |
5965 | if ((ap->stats.idle_irq % 1000) == 0) { | |
6d32d30f JG |
5966 | ata_chk_status(ap); |
5967 | ap->ops->irq_clear(ap); | |
f15a1daf | 5968 | ata_port_printk(ap, KERN_WARNING, "irq trap\n"); |
23cfce89 | 5969 | return 1; |
1da177e4 LT |
5970 | } |
5971 | #endif | |
5972 | return 0; /* irq not handled */ | |
5973 | } | |
5974 | ||
5975 | /** | |
5976 | * ata_interrupt - Default ATA host interrupt handler | |
0cba632b | 5977 | * @irq: irq line (unused) |
cca3974e | 5978 | * @dev_instance: pointer to our ata_host information structure |
1da177e4 | 5979 | * |
0cba632b JG |
5980 | * Default interrupt handler for PCI IDE devices. Calls |
5981 | * ata_host_intr() for each port that is not disabled. | |
5982 | * | |
1da177e4 | 5983 | * LOCKING: |
cca3974e | 5984 | * Obtains host lock during operation. |
1da177e4 LT |
5985 | * |
5986 | * RETURNS: | |
0cba632b | 5987 | * IRQ_NONE or IRQ_HANDLED. |
1da177e4 LT |
5988 | */ |
5989 | ||
7d12e780 | 5990 | irqreturn_t ata_interrupt (int irq, void *dev_instance) |
1da177e4 | 5991 | { |
cca3974e | 5992 | struct ata_host *host = dev_instance; |
1da177e4 LT |
5993 | unsigned int i; |
5994 | unsigned int handled = 0; | |
5995 | unsigned long flags; | |
5996 | ||
5997 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ | |
cca3974e | 5998 | spin_lock_irqsave(&host->lock, flags); |
1da177e4 | 5999 | |
cca3974e | 6000 | for (i = 0; i < host->n_ports; i++) { |
1da177e4 LT |
6001 | struct ata_port *ap; |
6002 | ||
cca3974e | 6003 | ap = host->ports[i]; |
c1389503 | 6004 | if (ap && |
029f5468 | 6005 | !(ap->flags & ATA_FLAG_DISABLED)) { |
1da177e4 LT |
6006 | struct ata_queued_cmd *qc; |
6007 | ||
9af5c9c9 | 6008 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
312f7da2 | 6009 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && |
21b1ed74 | 6010 | (qc->flags & ATA_QCFLAG_ACTIVE)) |
1da177e4 LT |
6011 | handled |= ata_host_intr(ap, qc); |
6012 | } | |
6013 | } | |
6014 | ||
cca3974e | 6015 | spin_unlock_irqrestore(&host->lock, flags); |
1da177e4 LT |
6016 | |
6017 | return IRQ_RETVAL(handled); | |
6018 | } | |
6019 | ||
34bf2170 TH |
6020 | /** |
6021 | * sata_scr_valid - test whether SCRs are accessible | |
936fd732 | 6022 | * @link: ATA link to test SCR accessibility for |
34bf2170 | 6023 | * |
936fd732 | 6024 | * Test whether SCRs are accessible for @link. |
34bf2170 TH |
6025 | * |
6026 | * LOCKING: | |
6027 | * None. | |
6028 | * | |
6029 | * RETURNS: | |
6030 | * 1 if SCRs are accessible, 0 otherwise. | |
6031 | */ | |
936fd732 | 6032 | int sata_scr_valid(struct ata_link *link) |
34bf2170 | 6033 | { |
936fd732 TH |
6034 | struct ata_port *ap = link->ap; |
6035 | ||
a16abc0b | 6036 | return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; |
34bf2170 TH |
6037 | } |
6038 | ||
6039 | /** | |
6040 | * sata_scr_read - read SCR register of the specified port | |
936fd732 | 6041 | * @link: ATA link to read SCR for |
34bf2170 TH |
6042 | * @reg: SCR to read |
6043 | * @val: Place to store read value | |
6044 | * | |
936fd732 | 6045 | * Read SCR register @reg of @link into *@val. This function is |
633273a3 TH |
6046 | * guaranteed to succeed if @link is ap->link, the cable type of |
6047 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
6048 | * |
6049 | * LOCKING: | |
633273a3 | 6050 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
6051 | * |
6052 | * RETURNS: | |
6053 | * 0 on success, negative errno on failure. | |
6054 | */ | |
936fd732 | 6055 | int sata_scr_read(struct ata_link *link, int reg, u32 *val) |
34bf2170 | 6056 | { |
633273a3 TH |
6057 | if (ata_is_host_link(link)) { |
6058 | struct ata_port *ap = link->ap; | |
936fd732 | 6059 | |
633273a3 TH |
6060 | if (sata_scr_valid(link)) |
6061 | return ap->ops->scr_read(ap, reg, val); | |
6062 | return -EOPNOTSUPP; | |
6063 | } | |
6064 | ||
6065 | return sata_pmp_scr_read(link, reg, val); | |
34bf2170 TH |
6066 | } |
6067 | ||
6068 | /** | |
6069 | * sata_scr_write - write SCR register of the specified port | |
936fd732 | 6070 | * @link: ATA link to write SCR for |
34bf2170 TH |
6071 | * @reg: SCR to write |
6072 | * @val: value to write | |
6073 | * | |
936fd732 | 6074 | * Write @val to SCR register @reg of @link. This function is |
633273a3 TH |
6075 | * guaranteed to succeed if @link is ap->link, the cable type of |
6076 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
6077 | * |
6078 | * LOCKING: | |
633273a3 | 6079 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
6080 | * |
6081 | * RETURNS: | |
6082 | * 0 on success, negative errno on failure. | |
6083 | */ | |
936fd732 | 6084 | int sata_scr_write(struct ata_link *link, int reg, u32 val) |
34bf2170 | 6085 | { |
633273a3 TH |
6086 | if (ata_is_host_link(link)) { |
6087 | struct ata_port *ap = link->ap; | |
6088 | ||
6089 | if (sata_scr_valid(link)) | |
6090 | return ap->ops->scr_write(ap, reg, val); | |
6091 | return -EOPNOTSUPP; | |
6092 | } | |
936fd732 | 6093 | |
633273a3 | 6094 | return sata_pmp_scr_write(link, reg, val); |
34bf2170 TH |
6095 | } |
6096 | ||
6097 | /** | |
6098 | * sata_scr_write_flush - write SCR register of the specified port and flush | |
936fd732 | 6099 | * @link: ATA link to write SCR for |
34bf2170 TH |
6100 | * @reg: SCR to write |
6101 | * @val: value to write | |
6102 | * | |
6103 | * This function is identical to sata_scr_write() except that this | |
6104 | * function performs flush after writing to the register. | |
6105 | * | |
6106 | * LOCKING: | |
633273a3 | 6107 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
6108 | * |
6109 | * RETURNS: | |
6110 | * 0 on success, negative errno on failure. | |
6111 | */ | |
936fd732 | 6112 | int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) |
34bf2170 | 6113 | { |
633273a3 TH |
6114 | if (ata_is_host_link(link)) { |
6115 | struct ata_port *ap = link->ap; | |
6116 | int rc; | |
da3dbb17 | 6117 | |
633273a3 TH |
6118 | if (sata_scr_valid(link)) { |
6119 | rc = ap->ops->scr_write(ap, reg, val); | |
6120 | if (rc == 0) | |
6121 | rc = ap->ops->scr_read(ap, reg, &val); | |
6122 | return rc; | |
6123 | } | |
6124 | return -EOPNOTSUPP; | |
34bf2170 | 6125 | } |
633273a3 TH |
6126 | |
6127 | return sata_pmp_scr_write(link, reg, val); | |
34bf2170 TH |
6128 | } |
6129 | ||
6130 | /** | |
936fd732 TH |
6131 | * ata_link_online - test whether the given link is online |
6132 | * @link: ATA link to test | |
34bf2170 | 6133 | * |
936fd732 TH |
6134 | * Test whether @link is online. Note that this function returns |
6135 | * 0 if online status of @link cannot be obtained, so | |
6136 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
6137 | * |
6138 | * LOCKING: | |
6139 | * None. | |
6140 | * | |
6141 | * RETURNS: | |
6142 | * 1 if the port online status is available and online. | |
6143 | */ | |
936fd732 | 6144 | int ata_link_online(struct ata_link *link) |
34bf2170 TH |
6145 | { |
6146 | u32 sstatus; | |
6147 | ||
936fd732 TH |
6148 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
6149 | (sstatus & 0xf) == 0x3) | |
34bf2170 TH |
6150 | return 1; |
6151 | return 0; | |
6152 | } | |
6153 | ||
6154 | /** | |
936fd732 TH |
6155 | * ata_link_offline - test whether the given link is offline |
6156 | * @link: ATA link to test | |
34bf2170 | 6157 | * |
936fd732 TH |
6158 | * Test whether @link is offline. Note that this function |
6159 | * returns 0 if offline status of @link cannot be obtained, so | |
6160 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
6161 | * |
6162 | * LOCKING: | |
6163 | * None. | |
6164 | * | |
6165 | * RETURNS: | |
6166 | * 1 if the port offline status is available and offline. | |
6167 | */ | |
936fd732 | 6168 | int ata_link_offline(struct ata_link *link) |
34bf2170 TH |
6169 | { |
6170 | u32 sstatus; | |
6171 | ||
936fd732 TH |
6172 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
6173 | (sstatus & 0xf) != 0x3) | |
34bf2170 TH |
6174 | return 1; |
6175 | return 0; | |
6176 | } | |
0baab86b | 6177 | |
77b08fb5 | 6178 | int ata_flush_cache(struct ata_device *dev) |
9b847548 | 6179 | { |
977e6b9f | 6180 | unsigned int err_mask; |
9b847548 JA |
6181 | u8 cmd; |
6182 | ||
6183 | if (!ata_try_flush_cache(dev)) | |
6184 | return 0; | |
6185 | ||
6fc49adb | 6186 | if (dev->flags & ATA_DFLAG_FLUSH_EXT) |
9b847548 JA |
6187 | cmd = ATA_CMD_FLUSH_EXT; |
6188 | else | |
6189 | cmd = ATA_CMD_FLUSH; | |
6190 | ||
4f34337b AC |
6191 | /* This is wrong. On a failed flush we get back the LBA of the lost |
6192 | sector and we should (assuming it wasn't aborted as unknown) issue | |
6193 | a further flush command to continue the writeback until it | |
6194 | does not error */ | |
977e6b9f TH |
6195 | err_mask = ata_do_simple_cmd(dev, cmd); |
6196 | if (err_mask) { | |
6197 | ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); | |
6198 | return -EIO; | |
6199 | } | |
6200 | ||
6201 | return 0; | |
9b847548 JA |
6202 | } |
6203 | ||
6ffa01d8 | 6204 | #ifdef CONFIG_PM |
cca3974e JG |
6205 | static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, |
6206 | unsigned int action, unsigned int ehi_flags, | |
6207 | int wait) | |
500530f6 TH |
6208 | { |
6209 | unsigned long flags; | |
6210 | int i, rc; | |
6211 | ||
cca3974e JG |
6212 | for (i = 0; i < host->n_ports; i++) { |
6213 | struct ata_port *ap = host->ports[i]; | |
e3667ebf | 6214 | struct ata_link *link; |
500530f6 TH |
6215 | |
6216 | /* Previous resume operation might still be in | |
6217 | * progress. Wait for PM_PENDING to clear. | |
6218 | */ | |
6219 | if (ap->pflags & ATA_PFLAG_PM_PENDING) { | |
6220 | ata_port_wait_eh(ap); | |
6221 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
6222 | } | |
6223 | ||
6224 | /* request PM ops to EH */ | |
6225 | spin_lock_irqsave(ap->lock, flags); | |
6226 | ||
6227 | ap->pm_mesg = mesg; | |
6228 | if (wait) { | |
6229 | rc = 0; | |
6230 | ap->pm_result = &rc; | |
6231 | } | |
6232 | ||
6233 | ap->pflags |= ATA_PFLAG_PM_PENDING; | |
e3667ebf TH |
6234 | __ata_port_for_each_link(link, ap) { |
6235 | link->eh_info.action |= action; | |
6236 | link->eh_info.flags |= ehi_flags; | |
6237 | } | |
500530f6 TH |
6238 | |
6239 | ata_port_schedule_eh(ap); | |
6240 | ||
6241 | spin_unlock_irqrestore(ap->lock, flags); | |
6242 | ||
6243 | /* wait and check result */ | |
6244 | if (wait) { | |
6245 | ata_port_wait_eh(ap); | |
6246 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
6247 | if (rc) | |
6248 | return rc; | |
6249 | } | |
6250 | } | |
6251 | ||
6252 | return 0; | |
6253 | } | |
6254 | ||
6255 | /** | |
cca3974e JG |
6256 | * ata_host_suspend - suspend host |
6257 | * @host: host to suspend | |
500530f6 TH |
6258 | * @mesg: PM message |
6259 | * | |
cca3974e | 6260 | * Suspend @host. Actual operation is performed by EH. This |
500530f6 TH |
6261 | * function requests EH to perform PM operations and waits for EH |
6262 | * to finish. | |
6263 | * | |
6264 | * LOCKING: | |
6265 | * Kernel thread context (may sleep). | |
6266 | * | |
6267 | * RETURNS: | |
6268 | * 0 on success, -errno on failure. | |
6269 | */ | |
cca3974e | 6270 | int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
500530f6 | 6271 | { |
9666f400 | 6272 | int rc; |
500530f6 | 6273 | |
cca3974e | 6274 | rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); |
9666f400 TH |
6275 | if (rc == 0) |
6276 | host->dev->power.power_state = mesg; | |
500530f6 TH |
6277 | return rc; |
6278 | } | |
6279 | ||
6280 | /** | |
cca3974e JG |
6281 | * ata_host_resume - resume host |
6282 | * @host: host to resume | |
500530f6 | 6283 | * |
cca3974e | 6284 | * Resume @host. Actual operation is performed by EH. This |
500530f6 TH |
6285 | * function requests EH to perform PM operations and returns. |
6286 | * Note that all resume operations are performed parallely. | |
6287 | * | |
6288 | * LOCKING: | |
6289 | * Kernel thread context (may sleep). | |
6290 | */ | |
cca3974e | 6291 | void ata_host_resume(struct ata_host *host) |
500530f6 | 6292 | { |
cca3974e JG |
6293 | ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, |
6294 | ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); | |
6295 | host->dev->power.power_state = PMSG_ON; | |
500530f6 | 6296 | } |
6ffa01d8 | 6297 | #endif |
500530f6 | 6298 | |
c893a3ae RD |
6299 | /** |
6300 | * ata_port_start - Set port up for dma. | |
6301 | * @ap: Port to initialize | |
6302 | * | |
6303 | * Called just after data structures for each port are | |
6304 | * initialized. Allocates space for PRD table. | |
6305 | * | |
6306 | * May be used as the port_start() entry in ata_port_operations. | |
6307 | * | |
6308 | * LOCKING: | |
6309 | * Inherited from caller. | |
6310 | */ | |
f0d36efd | 6311 | int ata_port_start(struct ata_port *ap) |
1da177e4 | 6312 | { |
2f1f610b | 6313 | struct device *dev = ap->dev; |
6037d6bb | 6314 | int rc; |
1da177e4 | 6315 | |
f0d36efd TH |
6316 | ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, |
6317 | GFP_KERNEL); | |
1da177e4 LT |
6318 | if (!ap->prd) |
6319 | return -ENOMEM; | |
6320 | ||
6037d6bb | 6321 | rc = ata_pad_alloc(ap, dev); |
f0d36efd | 6322 | if (rc) |
6037d6bb | 6323 | return rc; |
1da177e4 | 6324 | |
f0d36efd TH |
6325 | DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, |
6326 | (unsigned long long)ap->prd_dma); | |
1da177e4 LT |
6327 | return 0; |
6328 | } | |
6329 | ||
3ef3b43d TH |
6330 | /** |
6331 | * ata_dev_init - Initialize an ata_device structure | |
6332 | * @dev: Device structure to initialize | |
6333 | * | |
6334 | * Initialize @dev in preparation for probing. | |
6335 | * | |
6336 | * LOCKING: | |
6337 | * Inherited from caller. | |
6338 | */ | |
6339 | void ata_dev_init(struct ata_device *dev) | |
6340 | { | |
9af5c9c9 TH |
6341 | struct ata_link *link = dev->link; |
6342 | struct ata_port *ap = link->ap; | |
72fa4b74 TH |
6343 | unsigned long flags; |
6344 | ||
5a04bf4b | 6345 | /* SATA spd limit is bound to the first device */ |
9af5c9c9 TH |
6346 | link->sata_spd_limit = link->hw_sata_spd_limit; |
6347 | link->sata_spd = 0; | |
5a04bf4b | 6348 | |
72fa4b74 TH |
6349 | /* High bits of dev->flags are used to record warm plug |
6350 | * requests which occur asynchronously. Synchronize using | |
cca3974e | 6351 | * host lock. |
72fa4b74 | 6352 | */ |
ba6a1308 | 6353 | spin_lock_irqsave(ap->lock, flags); |
72fa4b74 | 6354 | dev->flags &= ~ATA_DFLAG_INIT_MASK; |
3dcc323f | 6355 | dev->horkage = 0; |
ba6a1308 | 6356 | spin_unlock_irqrestore(ap->lock, flags); |
3ef3b43d | 6357 | |
72fa4b74 TH |
6358 | memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, |
6359 | sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); | |
3ef3b43d TH |
6360 | dev->pio_mask = UINT_MAX; |
6361 | dev->mwdma_mask = UINT_MAX; | |
6362 | dev->udma_mask = UINT_MAX; | |
6363 | } | |
6364 | ||
4fb37a25 TH |
6365 | /** |
6366 | * ata_link_init - Initialize an ata_link structure | |
6367 | * @ap: ATA port link is attached to | |
6368 | * @link: Link structure to initialize | |
8989805d | 6369 | * @pmp: Port multiplier port number |
4fb37a25 TH |
6370 | * |
6371 | * Initialize @link. | |
6372 | * | |
6373 | * LOCKING: | |
6374 | * Kernel thread context (may sleep) | |
6375 | */ | |
fb7fd614 | 6376 | void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) |
4fb37a25 TH |
6377 | { |
6378 | int i; | |
6379 | ||
6380 | /* clear everything except for devices */ | |
6381 | memset(link, 0, offsetof(struct ata_link, device[0])); | |
6382 | ||
6383 | link->ap = ap; | |
8989805d | 6384 | link->pmp = pmp; |
4fb37a25 TH |
6385 | link->active_tag = ATA_TAG_POISON; |
6386 | link->hw_sata_spd_limit = UINT_MAX; | |
6387 | ||
6388 | /* can't use iterator, ap isn't initialized yet */ | |
6389 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
6390 | struct ata_device *dev = &link->device[i]; | |
6391 | ||
6392 | dev->link = link; | |
6393 | dev->devno = dev - link->device; | |
6394 | ata_dev_init(dev); | |
6395 | } | |
6396 | } | |
6397 | ||
6398 | /** | |
6399 | * sata_link_init_spd - Initialize link->sata_spd_limit | |
6400 | * @link: Link to configure sata_spd_limit for | |
6401 | * | |
6402 | * Initialize @link->[hw_]sata_spd_limit to the currently | |
6403 | * configured value. | |
6404 | * | |
6405 | * LOCKING: | |
6406 | * Kernel thread context (may sleep). | |
6407 | * | |
6408 | * RETURNS: | |
6409 | * 0 on success, -errno on failure. | |
6410 | */ | |
fb7fd614 | 6411 | int sata_link_init_spd(struct ata_link *link) |
4fb37a25 TH |
6412 | { |
6413 | u32 scontrol, spd; | |
6414 | int rc; | |
6415 | ||
6416 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); | |
6417 | if (rc) | |
6418 | return rc; | |
6419 | ||
6420 | spd = (scontrol >> 4) & 0xf; | |
6421 | if (spd) | |
6422 | link->hw_sata_spd_limit &= (1 << spd) - 1; | |
6423 | ||
6424 | link->sata_spd_limit = link->hw_sata_spd_limit; | |
6425 | ||
6426 | return 0; | |
6427 | } | |
6428 | ||
1da177e4 | 6429 | /** |
f3187195 TH |
6430 | * ata_port_alloc - allocate and initialize basic ATA port resources |
6431 | * @host: ATA host this allocated port belongs to | |
1da177e4 | 6432 | * |
f3187195 TH |
6433 | * Allocate and initialize basic ATA port resources. |
6434 | * | |
6435 | * RETURNS: | |
6436 | * Allocate ATA port on success, NULL on failure. | |
0cba632b | 6437 | * |
1da177e4 | 6438 | * LOCKING: |
f3187195 | 6439 | * Inherited from calling layer (may sleep). |
1da177e4 | 6440 | */ |
f3187195 | 6441 | struct ata_port *ata_port_alloc(struct ata_host *host) |
1da177e4 | 6442 | { |
f3187195 | 6443 | struct ata_port *ap; |
1da177e4 | 6444 | |
f3187195 TH |
6445 | DPRINTK("ENTER\n"); |
6446 | ||
6447 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); | |
6448 | if (!ap) | |
6449 | return NULL; | |
6450 | ||
f4d6d004 | 6451 | ap->pflags |= ATA_PFLAG_INITIALIZING; |
cca3974e | 6452 | ap->lock = &host->lock; |
198e0fed | 6453 | ap->flags = ATA_FLAG_DISABLED; |
f3187195 | 6454 | ap->print_id = -1; |
1da177e4 | 6455 | ap->ctl = ATA_DEVCTL_OBS; |
cca3974e | 6456 | ap->host = host; |
f3187195 | 6457 | ap->dev = host->dev; |
1da177e4 | 6458 | ap->last_ctl = 0xFF; |
bd5d825c BP |
6459 | |
6460 | #if defined(ATA_VERBOSE_DEBUG) | |
6461 | /* turn on all debugging levels */ | |
6462 | ap->msg_enable = 0x00FF; | |
6463 | #elif defined(ATA_DEBUG) | |
6464 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; | |
88574551 | 6465 | #else |
0dd4b21f | 6466 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
bd5d825c | 6467 | #endif |
1da177e4 | 6468 | |
65f27f38 DH |
6469 | INIT_DELAYED_WORK(&ap->port_task, NULL); |
6470 | INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); | |
6471 | INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); | |
a72ec4ce | 6472 | INIT_LIST_HEAD(&ap->eh_done_q); |
c6cf9e99 | 6473 | init_waitqueue_head(&ap->eh_wait_q); |
5ddf24c5 TH |
6474 | init_timer_deferrable(&ap->fastdrain_timer); |
6475 | ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; | |
6476 | ap->fastdrain_timer.data = (unsigned long)ap; | |
1da177e4 | 6477 | |
838df628 | 6478 | ap->cbl = ATA_CBL_NONE; |
838df628 | 6479 | |
8989805d | 6480 | ata_link_init(ap, &ap->link, 0); |
1da177e4 LT |
6481 | |
6482 | #ifdef ATA_IRQ_TRAP | |
6483 | ap->stats.unhandled_irq = 1; | |
6484 | ap->stats.idle_irq = 1; | |
6485 | #endif | |
1da177e4 | 6486 | return ap; |
1da177e4 LT |
6487 | } |
6488 | ||
f0d36efd TH |
6489 | static void ata_host_release(struct device *gendev, void *res) |
6490 | { | |
6491 | struct ata_host *host = dev_get_drvdata(gendev); | |
6492 | int i; | |
6493 | ||
6494 | for (i = 0; i < host->n_ports; i++) { | |
6495 | struct ata_port *ap = host->ports[i]; | |
6496 | ||
ecef7253 TH |
6497 | if (!ap) |
6498 | continue; | |
6499 | ||
6500 | if ((host->flags & ATA_HOST_STARTED) && ap->ops->port_stop) | |
f0d36efd | 6501 | ap->ops->port_stop(ap); |
f0d36efd TH |
6502 | } |
6503 | ||
ecef7253 | 6504 | if ((host->flags & ATA_HOST_STARTED) && host->ops->host_stop) |
f0d36efd | 6505 | host->ops->host_stop(host); |
1aa56cca | 6506 | |
1aa506e4 TH |
6507 | for (i = 0; i < host->n_ports; i++) { |
6508 | struct ata_port *ap = host->ports[i]; | |
6509 | ||
4911487a TH |
6510 | if (!ap) |
6511 | continue; | |
6512 | ||
6513 | if (ap->scsi_host) | |
1aa506e4 TH |
6514 | scsi_host_put(ap->scsi_host); |
6515 | ||
633273a3 | 6516 | kfree(ap->pmp_link); |
4911487a | 6517 | kfree(ap); |
1aa506e4 TH |
6518 | host->ports[i] = NULL; |
6519 | } | |
6520 | ||
1aa56cca | 6521 | dev_set_drvdata(gendev, NULL); |
f0d36efd TH |
6522 | } |
6523 | ||
f3187195 TH |
6524 | /** |
6525 | * ata_host_alloc - allocate and init basic ATA host resources | |
6526 | * @dev: generic device this host is associated with | |
6527 | * @max_ports: maximum number of ATA ports associated with this host | |
6528 | * | |
6529 | * Allocate and initialize basic ATA host resources. LLD calls | |
6530 | * this function to allocate a host, initializes it fully and | |
6531 | * attaches it using ata_host_register(). | |
6532 | * | |
6533 | * @max_ports ports are allocated and host->n_ports is | |
6534 | * initialized to @max_ports. The caller is allowed to decrease | |
6535 | * host->n_ports before calling ata_host_register(). The unused | |
6536 | * ports will be automatically freed on registration. | |
6537 | * | |
6538 | * RETURNS: | |
6539 | * Allocate ATA host on success, NULL on failure. | |
6540 | * | |
6541 | * LOCKING: | |
6542 | * Inherited from calling layer (may sleep). | |
6543 | */ | |
6544 | struct ata_host *ata_host_alloc(struct device *dev, int max_ports) | |
6545 | { | |
6546 | struct ata_host *host; | |
6547 | size_t sz; | |
6548 | int i; | |
6549 | ||
6550 | DPRINTK("ENTER\n"); | |
6551 | ||
6552 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) | |
6553 | return NULL; | |
6554 | ||
6555 | /* alloc a container for our list of ATA ports (buses) */ | |
6556 | sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); | |
6557 | /* alloc a container for our list of ATA ports (buses) */ | |
6558 | host = devres_alloc(ata_host_release, sz, GFP_KERNEL); | |
6559 | if (!host) | |
6560 | goto err_out; | |
6561 | ||
6562 | devres_add(dev, host); | |
6563 | dev_set_drvdata(dev, host); | |
6564 | ||
6565 | spin_lock_init(&host->lock); | |
6566 | host->dev = dev; | |
6567 | host->n_ports = max_ports; | |
6568 | ||
6569 | /* allocate ports bound to this host */ | |
6570 | for (i = 0; i < max_ports; i++) { | |
6571 | struct ata_port *ap; | |
6572 | ||
6573 | ap = ata_port_alloc(host); | |
6574 | if (!ap) | |
6575 | goto err_out; | |
6576 | ||
6577 | ap->port_no = i; | |
6578 | host->ports[i] = ap; | |
6579 | } | |
6580 | ||
6581 | devres_remove_group(dev, NULL); | |
6582 | return host; | |
6583 | ||
6584 | err_out: | |
6585 | devres_release_group(dev, NULL); | |
6586 | return NULL; | |
6587 | } | |
6588 | ||
f5cda257 TH |
6589 | /** |
6590 | * ata_host_alloc_pinfo - alloc host and init with port_info array | |
6591 | * @dev: generic device this host is associated with | |
6592 | * @ppi: array of ATA port_info to initialize host with | |
6593 | * @n_ports: number of ATA ports attached to this host | |
6594 | * | |
6595 | * Allocate ATA host and initialize with info from @ppi. If NULL | |
6596 | * terminated, @ppi may contain fewer entries than @n_ports. The | |
6597 | * last entry will be used for the remaining ports. | |
6598 | * | |
6599 | * RETURNS: | |
6600 | * Allocate ATA host on success, NULL on failure. | |
6601 | * | |
6602 | * LOCKING: | |
6603 | * Inherited from calling layer (may sleep). | |
6604 | */ | |
6605 | struct ata_host *ata_host_alloc_pinfo(struct device *dev, | |
6606 | const struct ata_port_info * const * ppi, | |
6607 | int n_ports) | |
6608 | { | |
6609 | const struct ata_port_info *pi; | |
6610 | struct ata_host *host; | |
6611 | int i, j; | |
6612 | ||
6613 | host = ata_host_alloc(dev, n_ports); | |
6614 | if (!host) | |
6615 | return NULL; | |
6616 | ||
6617 | for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { | |
6618 | struct ata_port *ap = host->ports[i]; | |
6619 | ||
6620 | if (ppi[j]) | |
6621 | pi = ppi[j++]; | |
6622 | ||
6623 | ap->pio_mask = pi->pio_mask; | |
6624 | ap->mwdma_mask = pi->mwdma_mask; | |
6625 | ap->udma_mask = pi->udma_mask; | |
6626 | ap->flags |= pi->flags; | |
0c88758b | 6627 | ap->link.flags |= pi->link_flags; |
f5cda257 TH |
6628 | ap->ops = pi->port_ops; |
6629 | ||
6630 | if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) | |
6631 | host->ops = pi->port_ops; | |
6632 | if (!host->private_data && pi->private_data) | |
6633 | host->private_data = pi->private_data; | |
6634 | } | |
6635 | ||
6636 | return host; | |
6637 | } | |
6638 | ||
ecef7253 TH |
6639 | /** |
6640 | * ata_host_start - start and freeze ports of an ATA host | |
6641 | * @host: ATA host to start ports for | |
6642 | * | |
6643 | * Start and then freeze ports of @host. Started status is | |
6644 | * recorded in host->flags, so this function can be called | |
6645 | * multiple times. Ports are guaranteed to get started only | |
f3187195 TH |
6646 | * once. If host->ops isn't initialized yet, its set to the |
6647 | * first non-dummy port ops. | |
ecef7253 TH |
6648 | * |
6649 | * LOCKING: | |
6650 | * Inherited from calling layer (may sleep). | |
6651 | * | |
6652 | * RETURNS: | |
6653 | * 0 if all ports are started successfully, -errno otherwise. | |
6654 | */ | |
6655 | int ata_host_start(struct ata_host *host) | |
6656 | { | |
6657 | int i, rc; | |
6658 | ||
6659 | if (host->flags & ATA_HOST_STARTED) | |
6660 | return 0; | |
6661 | ||
6662 | for (i = 0; i < host->n_ports; i++) { | |
6663 | struct ata_port *ap = host->ports[i]; | |
6664 | ||
f3187195 TH |
6665 | if (!host->ops && !ata_port_is_dummy(ap)) |
6666 | host->ops = ap->ops; | |
6667 | ||
ecef7253 TH |
6668 | if (ap->ops->port_start) { |
6669 | rc = ap->ops->port_start(ap); | |
6670 | if (rc) { | |
6671 | ata_port_printk(ap, KERN_ERR, "failed to " | |
6672 | "start port (errno=%d)\n", rc); | |
6673 | goto err_out; | |
6674 | } | |
6675 | } | |
6676 | ||
6677 | ata_eh_freeze_port(ap); | |
6678 | } | |
6679 | ||
6680 | host->flags |= ATA_HOST_STARTED; | |
6681 | return 0; | |
6682 | ||
6683 | err_out: | |
6684 | while (--i >= 0) { | |
6685 | struct ata_port *ap = host->ports[i]; | |
6686 | ||
6687 | if (ap->ops->port_stop) | |
6688 | ap->ops->port_stop(ap); | |
6689 | } | |
6690 | return rc; | |
6691 | } | |
6692 | ||
b03732f0 | 6693 | /** |
cca3974e JG |
6694 | * ata_sas_host_init - Initialize a host struct |
6695 | * @host: host to initialize | |
6696 | * @dev: device host is attached to | |
6697 | * @flags: host flags | |
6698 | * @ops: port_ops | |
b03732f0 BK |
6699 | * |
6700 | * LOCKING: | |
6701 | * PCI/etc. bus probe sem. | |
6702 | * | |
6703 | */ | |
f3187195 | 6704 | /* KILLME - the only user left is ipr */ |
cca3974e JG |
6705 | void ata_host_init(struct ata_host *host, struct device *dev, |
6706 | unsigned long flags, const struct ata_port_operations *ops) | |
b03732f0 | 6707 | { |
cca3974e JG |
6708 | spin_lock_init(&host->lock); |
6709 | host->dev = dev; | |
6710 | host->flags = flags; | |
6711 | host->ops = ops; | |
b03732f0 BK |
6712 | } |
6713 | ||
f3187195 TH |
6714 | /** |
6715 | * ata_host_register - register initialized ATA host | |
6716 | * @host: ATA host to register | |
6717 | * @sht: template for SCSI host | |
6718 | * | |
6719 | * Register initialized ATA host. @host is allocated using | |
6720 | * ata_host_alloc() and fully initialized by LLD. This function | |
6721 | * starts ports, registers @host with ATA and SCSI layers and | |
6722 | * probe registered devices. | |
6723 | * | |
6724 | * LOCKING: | |
6725 | * Inherited from calling layer (may sleep). | |
6726 | * | |
6727 | * RETURNS: | |
6728 | * 0 on success, -errno otherwise. | |
6729 | */ | |
6730 | int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) | |
6731 | { | |
6732 | int i, rc; | |
6733 | ||
6734 | /* host must have been started */ | |
6735 | if (!(host->flags & ATA_HOST_STARTED)) { | |
6736 | dev_printk(KERN_ERR, host->dev, | |
6737 | "BUG: trying to register unstarted host\n"); | |
6738 | WARN_ON(1); | |
6739 | return -EINVAL; | |
6740 | } | |
6741 | ||
6742 | /* Blow away unused ports. This happens when LLD can't | |
6743 | * determine the exact number of ports to allocate at | |
6744 | * allocation time. | |
6745 | */ | |
6746 | for (i = host->n_ports; host->ports[i]; i++) | |
6747 | kfree(host->ports[i]); | |
6748 | ||
6749 | /* give ports names and add SCSI hosts */ | |
6750 | for (i = 0; i < host->n_ports; i++) | |
6751 | host->ports[i]->print_id = ata_print_id++; | |
6752 | ||
6753 | rc = ata_scsi_add_hosts(host, sht); | |
6754 | if (rc) | |
6755 | return rc; | |
6756 | ||
fafbae87 TH |
6757 | /* associate with ACPI nodes */ |
6758 | ata_acpi_associate(host); | |
6759 | ||
f3187195 TH |
6760 | /* set cable, sata_spd_limit and report */ |
6761 | for (i = 0; i < host->n_ports; i++) { | |
6762 | struct ata_port *ap = host->ports[i]; | |
f3187195 TH |
6763 | unsigned long xfer_mask; |
6764 | ||
6765 | /* set SATA cable type if still unset */ | |
6766 | if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) | |
6767 | ap->cbl = ATA_CBL_SATA; | |
6768 | ||
6769 | /* init sata_spd_limit to the current value */ | |
4fb37a25 | 6770 | sata_link_init_spd(&ap->link); |
f3187195 | 6771 | |
cbcdd875 | 6772 | /* print per-port info to dmesg */ |
f3187195 TH |
6773 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, |
6774 | ap->udma_mask); | |
6775 | ||
f3187195 | 6776 | if (!ata_port_is_dummy(ap)) |
cbcdd875 TH |
6777 | ata_port_printk(ap, KERN_INFO, |
6778 | "%cATA max %s %s\n", | |
a16abc0b | 6779 | (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', |
f3187195 | 6780 | ata_mode_string(xfer_mask), |
cbcdd875 | 6781 | ap->link.eh_info.desc); |
f3187195 TH |
6782 | else |
6783 | ata_port_printk(ap, KERN_INFO, "DUMMY\n"); | |
6784 | } | |
6785 | ||
6786 | /* perform each probe synchronously */ | |
6787 | DPRINTK("probe begin\n"); | |
6788 | for (i = 0; i < host->n_ports; i++) { | |
6789 | struct ata_port *ap = host->ports[i]; | |
6790 | int rc; | |
6791 | ||
6792 | /* probe */ | |
6793 | if (ap->ops->error_handler) { | |
9af5c9c9 | 6794 | struct ata_eh_info *ehi = &ap->link.eh_info; |
f3187195 TH |
6795 | unsigned long flags; |
6796 | ||
6797 | ata_port_probe(ap); | |
6798 | ||
6799 | /* kick EH for boot probing */ | |
6800 | spin_lock_irqsave(ap->lock, flags); | |
6801 | ||
f58229f8 TH |
6802 | ehi->probe_mask = |
6803 | (1 << ata_link_max_devices(&ap->link)) - 1; | |
f3187195 TH |
6804 | ehi->action |= ATA_EH_SOFTRESET; |
6805 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; | |
6806 | ||
f4d6d004 | 6807 | ap->pflags &= ~ATA_PFLAG_INITIALIZING; |
f3187195 TH |
6808 | ap->pflags |= ATA_PFLAG_LOADING; |
6809 | ata_port_schedule_eh(ap); | |
6810 | ||
6811 | spin_unlock_irqrestore(ap->lock, flags); | |
6812 | ||
6813 | /* wait for EH to finish */ | |
6814 | ata_port_wait_eh(ap); | |
6815 | } else { | |
6816 | DPRINTK("ata%u: bus probe begin\n", ap->print_id); | |
6817 | rc = ata_bus_probe(ap); | |
6818 | DPRINTK("ata%u: bus probe end\n", ap->print_id); | |
6819 | ||
6820 | if (rc) { | |
6821 | /* FIXME: do something useful here? | |
6822 | * Current libata behavior will | |
6823 | * tear down everything when | |
6824 | * the module is removed | |
6825 | * or the h/w is unplugged. | |
6826 | */ | |
6827 | } | |
6828 | } | |
6829 | } | |
6830 | ||
6831 | /* probes are done, now scan each port's disk(s) */ | |
6832 | DPRINTK("host probe begin\n"); | |
6833 | for (i = 0; i < host->n_ports; i++) { | |
6834 | struct ata_port *ap = host->ports[i]; | |
6835 | ||
1ae46317 | 6836 | ata_scsi_scan_host(ap, 1); |
f3187195 TH |
6837 | } |
6838 | ||
6839 | return 0; | |
6840 | } | |
6841 | ||
f5cda257 TH |
6842 | /** |
6843 | * ata_host_activate - start host, request IRQ and register it | |
6844 | * @host: target ATA host | |
6845 | * @irq: IRQ to request | |
6846 | * @irq_handler: irq_handler used when requesting IRQ | |
6847 | * @irq_flags: irq_flags used when requesting IRQ | |
6848 | * @sht: scsi_host_template to use when registering the host | |
6849 | * | |
6850 | * After allocating an ATA host and initializing it, most libata | |
6851 | * LLDs perform three steps to activate the host - start host, | |
6852 | * request IRQ and register it. This helper takes necessasry | |
6853 | * arguments and performs the three steps in one go. | |
6854 | * | |
6855 | * LOCKING: | |
6856 | * Inherited from calling layer (may sleep). | |
6857 | * | |
6858 | * RETURNS: | |
6859 | * 0 on success, -errno otherwise. | |
6860 | */ | |
6861 | int ata_host_activate(struct ata_host *host, int irq, | |
6862 | irq_handler_t irq_handler, unsigned long irq_flags, | |
6863 | struct scsi_host_template *sht) | |
6864 | { | |
cbcdd875 | 6865 | int i, rc; |
f5cda257 TH |
6866 | |
6867 | rc = ata_host_start(host); | |
6868 | if (rc) | |
6869 | return rc; | |
6870 | ||
6871 | rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, | |
6872 | dev_driver_string(host->dev), host); | |
6873 | if (rc) | |
6874 | return rc; | |
6875 | ||
cbcdd875 TH |
6876 | for (i = 0; i < host->n_ports; i++) |
6877 | ata_port_desc(host->ports[i], "irq %d", irq); | |
4031826b | 6878 | |
f5cda257 TH |
6879 | rc = ata_host_register(host, sht); |
6880 | /* if failed, just free the IRQ and leave ports alone */ | |
6881 | if (rc) | |
6882 | devm_free_irq(host->dev, irq, host); | |
6883 | ||
6884 | return rc; | |
6885 | } | |
6886 | ||
720ba126 TH |
6887 | /** |
6888 | * ata_port_detach - Detach ATA port in prepration of device removal | |
6889 | * @ap: ATA port to be detached | |
6890 | * | |
6891 | * Detach all ATA devices and the associated SCSI devices of @ap; | |
6892 | * then, remove the associated SCSI host. @ap is guaranteed to | |
6893 | * be quiescent on return from this function. | |
6894 | * | |
6895 | * LOCKING: | |
6896 | * Kernel thread context (may sleep). | |
6897 | */ | |
6898 | void ata_port_detach(struct ata_port *ap) | |
6899 | { | |
6900 | unsigned long flags; | |
41bda9c9 | 6901 | struct ata_link *link; |
f58229f8 | 6902 | struct ata_device *dev; |
720ba126 TH |
6903 | |
6904 | if (!ap->ops->error_handler) | |
c3cf30a9 | 6905 | goto skip_eh; |
720ba126 TH |
6906 | |
6907 | /* tell EH we're leaving & flush EH */ | |
ba6a1308 | 6908 | spin_lock_irqsave(ap->lock, flags); |
b51e9e5d | 6909 | ap->pflags |= ATA_PFLAG_UNLOADING; |
ba6a1308 | 6910 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
6911 | |
6912 | ata_port_wait_eh(ap); | |
6913 | ||
6914 | /* EH is now guaranteed to see UNLOADING, so no new device | |
6915 | * will be attached. Disable all existing devices. | |
6916 | */ | |
ba6a1308 | 6917 | spin_lock_irqsave(ap->lock, flags); |
720ba126 | 6918 | |
41bda9c9 TH |
6919 | ata_port_for_each_link(link, ap) { |
6920 | ata_link_for_each_dev(dev, link) | |
6921 | ata_dev_disable(dev); | |
6922 | } | |
720ba126 | 6923 | |
ba6a1308 | 6924 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
6925 | |
6926 | /* Final freeze & EH. All in-flight commands are aborted. EH | |
6927 | * will be skipped and retrials will be terminated with bad | |
6928 | * target. | |
6929 | */ | |
ba6a1308 | 6930 | spin_lock_irqsave(ap->lock, flags); |
720ba126 | 6931 | ata_port_freeze(ap); /* won't be thawed */ |
ba6a1308 | 6932 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
6933 | |
6934 | ata_port_wait_eh(ap); | |
45a66c1c | 6935 | cancel_rearming_delayed_work(&ap->hotplug_task); |
720ba126 | 6936 | |
c3cf30a9 | 6937 | skip_eh: |
720ba126 | 6938 | /* remove the associated SCSI host */ |
cca3974e | 6939 | scsi_remove_host(ap->scsi_host); |
720ba126 TH |
6940 | } |
6941 | ||
0529c159 TH |
6942 | /** |
6943 | * ata_host_detach - Detach all ports of an ATA host | |
6944 | * @host: Host to detach | |
6945 | * | |
6946 | * Detach all ports of @host. | |
6947 | * | |
6948 | * LOCKING: | |
6949 | * Kernel thread context (may sleep). | |
6950 | */ | |
6951 | void ata_host_detach(struct ata_host *host) | |
6952 | { | |
6953 | int i; | |
6954 | ||
6955 | for (i = 0; i < host->n_ports; i++) | |
6956 | ata_port_detach(host->ports[i]); | |
6957 | } | |
6958 | ||
1da177e4 LT |
6959 | /** |
6960 | * ata_std_ports - initialize ioaddr with standard port offsets. | |
6961 | * @ioaddr: IO address structure to be initialized | |
0baab86b EF |
6962 | * |
6963 | * Utility function which initializes data_addr, error_addr, | |
6964 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, | |
6965 | * device_addr, status_addr, and command_addr to standard offsets | |
6966 | * relative to cmd_addr. | |
6967 | * | |
6968 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. | |
1da177e4 | 6969 | */ |
0baab86b | 6970 | |
1da177e4 LT |
6971 | void ata_std_ports(struct ata_ioports *ioaddr) |
6972 | { | |
6973 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; | |
6974 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; | |
6975 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; | |
6976 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; | |
6977 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; | |
6978 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; | |
6979 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; | |
6980 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; | |
6981 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; | |
6982 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; | |
6983 | } | |
6984 | ||
0baab86b | 6985 | |
374b1873 JG |
6986 | #ifdef CONFIG_PCI |
6987 | ||
1da177e4 LT |
6988 | /** |
6989 | * ata_pci_remove_one - PCI layer callback for device removal | |
6990 | * @pdev: PCI device that was removed | |
6991 | * | |
b878ca5d TH |
6992 | * PCI layer indicates to libata via this hook that hot-unplug or |
6993 | * module unload event has occurred. Detach all ports. Resource | |
6994 | * release is handled via devres. | |
1da177e4 LT |
6995 | * |
6996 | * LOCKING: | |
6997 | * Inherited from PCI layer (may sleep). | |
6998 | */ | |
f0d36efd | 6999 | void ata_pci_remove_one(struct pci_dev *pdev) |
1da177e4 LT |
7000 | { |
7001 | struct device *dev = pci_dev_to_dev(pdev); | |
cca3974e | 7002 | struct ata_host *host = dev_get_drvdata(dev); |
1da177e4 | 7003 | |
b878ca5d | 7004 | ata_host_detach(host); |
1da177e4 LT |
7005 | } |
7006 | ||
7007 | /* move to PCI subsystem */ | |
057ace5e | 7008 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
7009 | { |
7010 | unsigned long tmp = 0; | |
7011 | ||
7012 | switch (bits->width) { | |
7013 | case 1: { | |
7014 | u8 tmp8 = 0; | |
7015 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
7016 | tmp = tmp8; | |
7017 | break; | |
7018 | } | |
7019 | case 2: { | |
7020 | u16 tmp16 = 0; | |
7021 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
7022 | tmp = tmp16; | |
7023 | break; | |
7024 | } | |
7025 | case 4: { | |
7026 | u32 tmp32 = 0; | |
7027 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
7028 | tmp = tmp32; | |
7029 | break; | |
7030 | } | |
7031 | ||
7032 | default: | |
7033 | return -EINVAL; | |
7034 | } | |
7035 | ||
7036 | tmp &= bits->mask; | |
7037 | ||
7038 | return (tmp == bits->val) ? 1 : 0; | |
7039 | } | |
9b847548 | 7040 | |
6ffa01d8 | 7041 | #ifdef CONFIG_PM |
3c5100c1 | 7042 | void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) |
9b847548 JA |
7043 | { |
7044 | pci_save_state(pdev); | |
4c90d971 | 7045 | pci_disable_device(pdev); |
500530f6 | 7046 | |
4c90d971 | 7047 | if (mesg.event == PM_EVENT_SUSPEND) |
500530f6 | 7048 | pci_set_power_state(pdev, PCI_D3hot); |
9b847548 JA |
7049 | } |
7050 | ||
553c4aa6 | 7051 | int ata_pci_device_do_resume(struct pci_dev *pdev) |
9b847548 | 7052 | { |
553c4aa6 TH |
7053 | int rc; |
7054 | ||
9b847548 JA |
7055 | pci_set_power_state(pdev, PCI_D0); |
7056 | pci_restore_state(pdev); | |
553c4aa6 | 7057 | |
b878ca5d | 7058 | rc = pcim_enable_device(pdev); |
553c4aa6 TH |
7059 | if (rc) { |
7060 | dev_printk(KERN_ERR, &pdev->dev, | |
7061 | "failed to enable device after resume (%d)\n", rc); | |
7062 | return rc; | |
7063 | } | |
7064 | ||
9b847548 | 7065 | pci_set_master(pdev); |
553c4aa6 | 7066 | return 0; |
500530f6 TH |
7067 | } |
7068 | ||
3c5100c1 | 7069 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) |
500530f6 | 7070 | { |
cca3974e | 7071 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
500530f6 TH |
7072 | int rc = 0; |
7073 | ||
cca3974e | 7074 | rc = ata_host_suspend(host, mesg); |
500530f6 TH |
7075 | if (rc) |
7076 | return rc; | |
7077 | ||
3c5100c1 | 7078 | ata_pci_device_do_suspend(pdev, mesg); |
500530f6 TH |
7079 | |
7080 | return 0; | |
7081 | } | |
7082 | ||
7083 | int ata_pci_device_resume(struct pci_dev *pdev) | |
7084 | { | |
cca3974e | 7085 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
553c4aa6 | 7086 | int rc; |
500530f6 | 7087 | |
553c4aa6 TH |
7088 | rc = ata_pci_device_do_resume(pdev); |
7089 | if (rc == 0) | |
7090 | ata_host_resume(host); | |
7091 | return rc; | |
9b847548 | 7092 | } |
6ffa01d8 TH |
7093 | #endif /* CONFIG_PM */ |
7094 | ||
1da177e4 LT |
7095 | #endif /* CONFIG_PCI */ |
7096 | ||
7097 | ||
1da177e4 LT |
7098 | static int __init ata_init(void) |
7099 | { | |
a8601e5f | 7100 | ata_probe_timeout *= HZ; |
1da177e4 LT |
7101 | ata_wq = create_workqueue("ata"); |
7102 | if (!ata_wq) | |
7103 | return -ENOMEM; | |
7104 | ||
453b07ac TH |
7105 | ata_aux_wq = create_singlethread_workqueue("ata_aux"); |
7106 | if (!ata_aux_wq) { | |
7107 | destroy_workqueue(ata_wq); | |
7108 | return -ENOMEM; | |
7109 | } | |
7110 | ||
1da177e4 LT |
7111 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
7112 | return 0; | |
7113 | } | |
7114 | ||
7115 | static void __exit ata_exit(void) | |
7116 | { | |
7117 | destroy_workqueue(ata_wq); | |
453b07ac | 7118 | destroy_workqueue(ata_aux_wq); |
1da177e4 LT |
7119 | } |
7120 | ||
a4625085 | 7121 | subsys_initcall(ata_init); |
1da177e4 LT |
7122 | module_exit(ata_exit); |
7123 | ||
67846b30 | 7124 | static unsigned long ratelimit_time; |
34af946a | 7125 | static DEFINE_SPINLOCK(ata_ratelimit_lock); |
67846b30 JG |
7126 | |
7127 | int ata_ratelimit(void) | |
7128 | { | |
7129 | int rc; | |
7130 | unsigned long flags; | |
7131 | ||
7132 | spin_lock_irqsave(&ata_ratelimit_lock, flags); | |
7133 | ||
7134 | if (time_after(jiffies, ratelimit_time)) { | |
7135 | rc = 1; | |
7136 | ratelimit_time = jiffies + (HZ/5); | |
7137 | } else | |
7138 | rc = 0; | |
7139 | ||
7140 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); | |
7141 | ||
7142 | return rc; | |
7143 | } | |
7144 | ||
c22daff4 TH |
7145 | /** |
7146 | * ata_wait_register - wait until register value changes | |
7147 | * @reg: IO-mapped register | |
7148 | * @mask: Mask to apply to read register value | |
7149 | * @val: Wait condition | |
7150 | * @interval_msec: polling interval in milliseconds | |
7151 | * @timeout_msec: timeout in milliseconds | |
7152 | * | |
7153 | * Waiting for some bits of register to change is a common | |
7154 | * operation for ATA controllers. This function reads 32bit LE | |
7155 | * IO-mapped register @reg and tests for the following condition. | |
7156 | * | |
7157 | * (*@reg & mask) != val | |
7158 | * | |
7159 | * If the condition is met, it returns; otherwise, the process is | |
7160 | * repeated after @interval_msec until timeout. | |
7161 | * | |
7162 | * LOCKING: | |
7163 | * Kernel thread context (may sleep) | |
7164 | * | |
7165 | * RETURNS: | |
7166 | * The final register value. | |
7167 | */ | |
7168 | u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, | |
7169 | unsigned long interval_msec, | |
7170 | unsigned long timeout_msec) | |
7171 | { | |
7172 | unsigned long timeout; | |
7173 | u32 tmp; | |
7174 | ||
7175 | tmp = ioread32(reg); | |
7176 | ||
7177 | /* Calculate timeout _after_ the first read to make sure | |
7178 | * preceding writes reach the controller before starting to | |
7179 | * eat away the timeout. | |
7180 | */ | |
7181 | timeout = jiffies + (timeout_msec * HZ) / 1000; | |
7182 | ||
7183 | while ((tmp & mask) == val && time_before(jiffies, timeout)) { | |
7184 | msleep(interval_msec); | |
7185 | tmp = ioread32(reg); | |
7186 | } | |
7187 | ||
7188 | return tmp; | |
7189 | } | |
7190 | ||
dd5b06c4 TH |
7191 | /* |
7192 | * Dummy port_ops | |
7193 | */ | |
7194 | static void ata_dummy_noret(struct ata_port *ap) { } | |
7195 | static int ata_dummy_ret0(struct ata_port *ap) { return 0; } | |
7196 | static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } | |
7197 | ||
7198 | static u8 ata_dummy_check_status(struct ata_port *ap) | |
7199 | { | |
7200 | return ATA_DRDY; | |
7201 | } | |
7202 | ||
7203 | static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) | |
7204 | { | |
7205 | return AC_ERR_SYSTEM; | |
7206 | } | |
7207 | ||
7208 | const struct ata_port_operations ata_dummy_port_ops = { | |
dd5b06c4 TH |
7209 | .check_status = ata_dummy_check_status, |
7210 | .check_altstatus = ata_dummy_check_status, | |
7211 | .dev_select = ata_noop_dev_select, | |
7212 | .qc_prep = ata_noop_qc_prep, | |
7213 | .qc_issue = ata_dummy_qc_issue, | |
7214 | .freeze = ata_dummy_noret, | |
7215 | .thaw = ata_dummy_noret, | |
7216 | .error_handler = ata_dummy_noret, | |
7217 | .post_internal_cmd = ata_dummy_qc_noret, | |
7218 | .irq_clear = ata_dummy_noret, | |
7219 | .port_start = ata_dummy_ret0, | |
7220 | .port_stop = ata_dummy_noret, | |
7221 | }; | |
7222 | ||
21b0ad4f TH |
7223 | const struct ata_port_info ata_dummy_port_info = { |
7224 | .port_ops = &ata_dummy_port_ops, | |
7225 | }; | |
7226 | ||
1da177e4 LT |
7227 | /* |
7228 | * libata is essentially a library of internal helper functions for | |
7229 | * low-level ATA host controller drivers. As such, the API/ABI is | |
7230 | * likely to change as new drivers are added and updated. | |
7231 | * Do not depend on ABI/API stability. | |
7232 | */ | |
7233 | ||
e9c83914 TH |
7234 | EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
7235 | EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); | |
7236 | EXPORT_SYMBOL_GPL(sata_deb_timing_long); | |
dd5b06c4 | 7237 | EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
21b0ad4f | 7238 | EXPORT_SYMBOL_GPL(ata_dummy_port_info); |
1da177e4 LT |
7239 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
7240 | EXPORT_SYMBOL_GPL(ata_std_ports); | |
cca3974e | 7241 | EXPORT_SYMBOL_GPL(ata_host_init); |
f3187195 | 7242 | EXPORT_SYMBOL_GPL(ata_host_alloc); |
f5cda257 | 7243 | EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); |
ecef7253 | 7244 | EXPORT_SYMBOL_GPL(ata_host_start); |
f3187195 | 7245 | EXPORT_SYMBOL_GPL(ata_host_register); |
f5cda257 | 7246 | EXPORT_SYMBOL_GPL(ata_host_activate); |
0529c159 | 7247 | EXPORT_SYMBOL_GPL(ata_host_detach); |
1da177e4 LT |
7248 | EXPORT_SYMBOL_GPL(ata_sg_init); |
7249 | EXPORT_SYMBOL_GPL(ata_sg_init_one); | |
9a1004d0 | 7250 | EXPORT_SYMBOL_GPL(ata_hsm_move); |
f686bcb8 | 7251 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
dedaf2b0 | 7252 | EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); |
1da177e4 | 7253 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
1da177e4 LT |
7254 | EXPORT_SYMBOL_GPL(ata_tf_load); |
7255 | EXPORT_SYMBOL_GPL(ata_tf_read); | |
7256 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); | |
7257 | EXPORT_SYMBOL_GPL(ata_std_dev_select); | |
43727fbc | 7258 | EXPORT_SYMBOL_GPL(sata_print_link_status); |
1da177e4 LT |
7259 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
7260 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
7261 | EXPORT_SYMBOL_GPL(ata_check_status); | |
7262 | EXPORT_SYMBOL_GPL(ata_altstatus); | |
1da177e4 LT |
7263 | EXPORT_SYMBOL_GPL(ata_exec_command); |
7264 | EXPORT_SYMBOL_GPL(ata_port_start); | |
d92e74d3 | 7265 | EXPORT_SYMBOL_GPL(ata_sff_port_start); |
1da177e4 | 7266 | EXPORT_SYMBOL_GPL(ata_interrupt); |
04351821 | 7267 | EXPORT_SYMBOL_GPL(ata_do_set_mode); |
0d5ff566 TH |
7268 | EXPORT_SYMBOL_GPL(ata_data_xfer); |
7269 | EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); | |
31cc23b3 | 7270 | EXPORT_SYMBOL_GPL(ata_std_qc_defer); |
1da177e4 | 7271 | EXPORT_SYMBOL_GPL(ata_qc_prep); |
d26fc955 | 7272 | EXPORT_SYMBOL_GPL(ata_dumb_qc_prep); |
e46834cd | 7273 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
1da177e4 LT |
7274 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
7275 | EXPORT_SYMBOL_GPL(ata_bmdma_start); | |
7276 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); | |
7277 | EXPORT_SYMBOL_GPL(ata_bmdma_status); | |
7278 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); | |
6d97dbd7 TH |
7279 | EXPORT_SYMBOL_GPL(ata_bmdma_freeze); |
7280 | EXPORT_SYMBOL_GPL(ata_bmdma_thaw); | |
7281 | EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); | |
7282 | EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); | |
7283 | EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); | |
1da177e4 | 7284 | EXPORT_SYMBOL_GPL(ata_port_probe); |
10305f0f | 7285 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
3c567b7d | 7286 | EXPORT_SYMBOL_GPL(sata_set_spd); |
936fd732 TH |
7287 | EXPORT_SYMBOL_GPL(sata_link_debounce); |
7288 | EXPORT_SYMBOL_GPL(sata_link_resume); | |
1da177e4 LT |
7289 | EXPORT_SYMBOL_GPL(sata_phy_reset); |
7290 | EXPORT_SYMBOL_GPL(__sata_phy_reset); | |
7291 | EXPORT_SYMBOL_GPL(ata_bus_reset); | |
f5914a46 | 7292 | EXPORT_SYMBOL_GPL(ata_std_prereset); |
c2bd5804 | 7293 | EXPORT_SYMBOL_GPL(ata_std_softreset); |
cc0680a5 | 7294 | EXPORT_SYMBOL_GPL(sata_link_hardreset); |
c2bd5804 TH |
7295 | EXPORT_SYMBOL_GPL(sata_std_hardreset); |
7296 | EXPORT_SYMBOL_GPL(ata_std_postreset); | |
2e9edbf8 JG |
7297 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
7298 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
1da177e4 | 7299 | EXPORT_SYMBOL_GPL(ata_port_disable); |
67846b30 | 7300 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
c22daff4 | 7301 | EXPORT_SYMBOL_GPL(ata_wait_register); |
6f8b9958 | 7302 | EXPORT_SYMBOL_GPL(ata_busy_sleep); |
d4b2bab4 | 7303 | EXPORT_SYMBOL_GPL(ata_wait_ready); |
86e45b6b | 7304 | EXPORT_SYMBOL_GPL(ata_port_queue_task); |
1da177e4 LT |
7305 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
7306 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); | |
1da177e4 | 7307 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
83c47bcb | 7308 | EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); |
a6e6ce8e | 7309 | EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); |
1da177e4 | 7310 | EXPORT_SYMBOL_GPL(ata_host_intr); |
34bf2170 TH |
7311 | EXPORT_SYMBOL_GPL(sata_scr_valid); |
7312 | EXPORT_SYMBOL_GPL(sata_scr_read); | |
7313 | EXPORT_SYMBOL_GPL(sata_scr_write); | |
7314 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); | |
936fd732 TH |
7315 | EXPORT_SYMBOL_GPL(ata_link_online); |
7316 | EXPORT_SYMBOL_GPL(ata_link_offline); | |
6ffa01d8 | 7317 | #ifdef CONFIG_PM |
cca3974e JG |
7318 | EXPORT_SYMBOL_GPL(ata_host_suspend); |
7319 | EXPORT_SYMBOL_GPL(ata_host_resume); | |
6ffa01d8 | 7320 | #endif /* CONFIG_PM */ |
6a62a04d TH |
7321 | EXPORT_SYMBOL_GPL(ata_id_string); |
7322 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
10305f0f | 7323 | EXPORT_SYMBOL_GPL(ata_id_to_dma_mode); |
1da177e4 LT |
7324 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
7325 | ||
1bc4ccff | 7326 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
452503f9 AC |
7327 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
7328 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
7329 | ||
1da177e4 LT |
7330 | #ifdef CONFIG_PCI |
7331 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
d583bc18 | 7332 | EXPORT_SYMBOL_GPL(ata_pci_init_sff_host); |
1626aeb8 | 7333 | EXPORT_SYMBOL_GPL(ata_pci_init_bmdma); |
d583bc18 | 7334 | EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host); |
1da177e4 LT |
7335 | EXPORT_SYMBOL_GPL(ata_pci_init_one); |
7336 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); | |
6ffa01d8 | 7337 | #ifdef CONFIG_PM |
500530f6 TH |
7338 | EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
7339 | EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); | |
9b847548 JA |
7340 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
7341 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
6ffa01d8 | 7342 | #endif /* CONFIG_PM */ |
67951ade AC |
7343 | EXPORT_SYMBOL_GPL(ata_pci_default_filter); |
7344 | EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); | |
1da177e4 | 7345 | #endif /* CONFIG_PCI */ |
9b847548 | 7346 | |
31f88384 | 7347 | EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch); |
3af9a77a TH |
7348 | EXPORT_SYMBOL_GPL(sata_pmp_read_init_tf); |
7349 | EXPORT_SYMBOL_GPL(sata_pmp_read_val); | |
7350 | EXPORT_SYMBOL_GPL(sata_pmp_write_init_tf); | |
7351 | EXPORT_SYMBOL_GPL(sata_pmp_std_prereset); | |
7352 | EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset); | |
7353 | EXPORT_SYMBOL_GPL(sata_pmp_std_postreset); | |
7354 | EXPORT_SYMBOL_GPL(sata_pmp_do_eh); | |
7355 | ||
b64bbc39 TH |
7356 | EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); |
7357 | EXPORT_SYMBOL_GPL(ata_ehi_push_desc); | |
7358 | EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); | |
cbcdd875 TH |
7359 | EXPORT_SYMBOL_GPL(ata_port_desc); |
7360 | #ifdef CONFIG_PCI | |
7361 | EXPORT_SYMBOL_GPL(ata_port_pbar_desc); | |
7362 | #endif /* CONFIG_PCI */ | |
ece1d636 | 7363 | EXPORT_SYMBOL_GPL(ata_eng_timeout); |
7b70fc03 | 7364 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
dbd82616 | 7365 | EXPORT_SYMBOL_GPL(ata_link_abort); |
7b70fc03 | 7366 | EXPORT_SYMBOL_GPL(ata_port_abort); |
e3180499 | 7367 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
7d77b247 | 7368 | EXPORT_SYMBOL_GPL(sata_async_notification); |
e3180499 TH |
7369 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
7370 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); | |
ece1d636 TH |
7371 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
7372 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
022bdb07 | 7373 | EXPORT_SYMBOL_GPL(ata_do_eh); |
83625006 | 7374 | EXPORT_SYMBOL_GPL(ata_irq_on); |
a619f981 | 7375 | EXPORT_SYMBOL_GPL(ata_dev_try_classify); |
be0d18df AC |
7376 | |
7377 | EXPORT_SYMBOL_GPL(ata_cable_40wire); | |
7378 | EXPORT_SYMBOL_GPL(ata_cable_80wire); | |
7379 | EXPORT_SYMBOL_GPL(ata_cable_unknown); | |
7380 | EXPORT_SYMBOL_GPL(ata_cable_sata); |