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1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-core.c - helper library for ATA |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from http://www.t13.org/ and | |
31 | * http://www.sata-io.org/ | |
32 | * | |
1da177e4 LT |
33 | */ |
34 | ||
1da177e4 LT |
35 | #include <linux/kernel.h> |
36 | #include <linux/module.h> | |
37 | #include <linux/pci.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/list.h> | |
40 | #include <linux/mm.h> | |
41 | #include <linux/highmem.h> | |
42 | #include <linux/spinlock.h> | |
43 | #include <linux/blkdev.h> | |
44 | #include <linux/delay.h> | |
45 | #include <linux/timer.h> | |
46 | #include <linux/interrupt.h> | |
47 | #include <linux/completion.h> | |
48 | #include <linux/suspend.h> | |
49 | #include <linux/workqueue.h> | |
67846b30 | 50 | #include <linux/jiffies.h> |
378f058c | 51 | #include <linux/scatterlist.h> |
1da177e4 | 52 | #include <scsi/scsi.h> |
193515d5 | 53 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
54 | #include <scsi/scsi_host.h> |
55 | #include <linux/libata.h> | |
56 | #include <asm/io.h> | |
57 | #include <asm/semaphore.h> | |
58 | #include <asm/byteorder.h> | |
59 | ||
60 | #include "libata.h" | |
61 | ||
cb48cab7 | 62 | #define DRV_VERSION "2.20" /* must be exactly four chars */ |
fda0efc5 JG |
63 | |
64 | ||
d7bb4cc7 | 65 | /* debounce timing parameters in msecs { interval, duration, timeout } */ |
e9c83914 TH |
66 | const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; |
67 | const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; | |
68 | const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; | |
d7bb4cc7 | 69 | |
3373efd8 TH |
70 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
71 | u16 heads, u16 sectors); | |
72 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev); | |
73 | static void ata_dev_xfermask(struct ata_device *dev); | |
1da177e4 | 74 | |
f3187195 | 75 | unsigned int ata_print_id = 1; |
1da177e4 LT |
76 | static struct workqueue_struct *ata_wq; |
77 | ||
453b07ac TH |
78 | struct workqueue_struct *ata_aux_wq; |
79 | ||
418dc1f5 | 80 | int atapi_enabled = 1; |
1623c81e JG |
81 | module_param(atapi_enabled, int, 0444); |
82 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); | |
83 | ||
95de719a AL |
84 | int atapi_dmadir = 0; |
85 | module_param(atapi_dmadir, int, 0444); | |
86 | MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); | |
87 | ||
c3c013a2 JG |
88 | int libata_fua = 0; |
89 | module_param_named(fua, libata_fua, int, 0444); | |
90 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); | |
91 | ||
a8601e5f AM |
92 | static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; |
93 | module_param(ata_probe_timeout, int, 0444); | |
94 | MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); | |
95 | ||
d7d0dad6 JG |
96 | int libata_noacpi = 1; |
97 | module_param_named(noacpi, libata_noacpi, int, 0444); | |
11ef697b KCA |
98 | MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in suspend/resume when set"); |
99 | ||
1da177e4 LT |
100 | MODULE_AUTHOR("Jeff Garzik"); |
101 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
102 | MODULE_LICENSE("GPL"); | |
103 | MODULE_VERSION(DRV_VERSION); | |
104 | ||
0baab86b | 105 | |
1da177e4 LT |
106 | /** |
107 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
108 | * @tf: Taskfile to convert | |
109 | * @fis: Buffer into which data will output | |
110 | * @pmp: Port multiplier port | |
111 | * | |
112 | * Converts a standard ATA taskfile to a Serial ATA | |
113 | * FIS structure (Register - Host to Device). | |
114 | * | |
115 | * LOCKING: | |
116 | * Inherited from caller. | |
117 | */ | |
118 | ||
057ace5e | 119 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) |
1da177e4 LT |
120 | { |
121 | fis[0] = 0x27; /* Register - Host to Device FIS */ | |
122 | fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, | |
123 | bit 7 indicates Command FIS */ | |
124 | fis[2] = tf->command; | |
125 | fis[3] = tf->feature; | |
126 | ||
127 | fis[4] = tf->lbal; | |
128 | fis[5] = tf->lbam; | |
129 | fis[6] = tf->lbah; | |
130 | fis[7] = tf->device; | |
131 | ||
132 | fis[8] = tf->hob_lbal; | |
133 | fis[9] = tf->hob_lbam; | |
134 | fis[10] = tf->hob_lbah; | |
135 | fis[11] = tf->hob_feature; | |
136 | ||
137 | fis[12] = tf->nsect; | |
138 | fis[13] = tf->hob_nsect; | |
139 | fis[14] = 0; | |
140 | fis[15] = tf->ctl; | |
141 | ||
142 | fis[16] = 0; | |
143 | fis[17] = 0; | |
144 | fis[18] = 0; | |
145 | fis[19] = 0; | |
146 | } | |
147 | ||
148 | /** | |
149 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
150 | * @fis: Buffer from which data will be input | |
151 | * @tf: Taskfile to output | |
152 | * | |
e12a1be6 | 153 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
154 | * |
155 | * LOCKING: | |
156 | * Inherited from caller. | |
157 | */ | |
158 | ||
057ace5e | 159 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
160 | { |
161 | tf->command = fis[2]; /* status */ | |
162 | tf->feature = fis[3]; /* error */ | |
163 | ||
164 | tf->lbal = fis[4]; | |
165 | tf->lbam = fis[5]; | |
166 | tf->lbah = fis[6]; | |
167 | tf->device = fis[7]; | |
168 | ||
169 | tf->hob_lbal = fis[8]; | |
170 | tf->hob_lbam = fis[9]; | |
171 | tf->hob_lbah = fis[10]; | |
172 | ||
173 | tf->nsect = fis[12]; | |
174 | tf->hob_nsect = fis[13]; | |
175 | } | |
176 | ||
8cbd6df1 AL |
177 | static const u8 ata_rw_cmds[] = { |
178 | /* pio multi */ | |
179 | ATA_CMD_READ_MULTI, | |
180 | ATA_CMD_WRITE_MULTI, | |
181 | ATA_CMD_READ_MULTI_EXT, | |
182 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
183 | 0, |
184 | 0, | |
185 | 0, | |
186 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
187 | /* pio */ |
188 | ATA_CMD_PIO_READ, | |
189 | ATA_CMD_PIO_WRITE, | |
190 | ATA_CMD_PIO_READ_EXT, | |
191 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
192 | 0, |
193 | 0, | |
194 | 0, | |
195 | 0, | |
8cbd6df1 AL |
196 | /* dma */ |
197 | ATA_CMD_READ, | |
198 | ATA_CMD_WRITE, | |
199 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
200 | ATA_CMD_WRITE_EXT, |
201 | 0, | |
202 | 0, | |
203 | 0, | |
204 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 205 | }; |
1da177e4 LT |
206 | |
207 | /** | |
8cbd6df1 | 208 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
bd056d7e TH |
209 | * @tf: command to examine and configure |
210 | * @dev: device tf belongs to | |
1da177e4 | 211 | * |
2e9edbf8 | 212 | * Examine the device configuration and tf->flags to calculate |
8cbd6df1 | 213 | * the proper read/write commands and protocol to use. |
1da177e4 LT |
214 | * |
215 | * LOCKING: | |
216 | * caller. | |
217 | */ | |
bd056d7e | 218 | static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) |
1da177e4 | 219 | { |
9a3dccc4 | 220 | u8 cmd; |
1da177e4 | 221 | |
9a3dccc4 | 222 | int index, fua, lba48, write; |
2e9edbf8 | 223 | |
9a3dccc4 | 224 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
225 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
226 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 227 | |
8cbd6df1 AL |
228 | if (dev->flags & ATA_DFLAG_PIO) { |
229 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 230 | index = dev->multi_count ? 0 : 8; |
bd056d7e | 231 | } else if (lba48 && (dev->ap->flags & ATA_FLAG_PIO_LBA48)) { |
8d238e01 AC |
232 | /* Unable to use DMA due to host limitation */ |
233 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 234 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
235 | } else { |
236 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 237 | index = 16; |
8cbd6df1 | 238 | } |
1da177e4 | 239 | |
9a3dccc4 TH |
240 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
241 | if (cmd) { | |
242 | tf->command = cmd; | |
243 | return 0; | |
244 | } | |
245 | return -1; | |
1da177e4 LT |
246 | } |
247 | ||
35b649fe TH |
248 | /** |
249 | * ata_tf_read_block - Read block address from ATA taskfile | |
250 | * @tf: ATA taskfile of interest | |
251 | * @dev: ATA device @tf belongs to | |
252 | * | |
253 | * LOCKING: | |
254 | * None. | |
255 | * | |
256 | * Read block address from @tf. This function can handle all | |
257 | * three address formats - LBA, LBA48 and CHS. tf->protocol and | |
258 | * flags select the address format to use. | |
259 | * | |
260 | * RETURNS: | |
261 | * Block address read from @tf. | |
262 | */ | |
263 | u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) | |
264 | { | |
265 | u64 block = 0; | |
266 | ||
267 | if (tf->flags & ATA_TFLAG_LBA) { | |
268 | if (tf->flags & ATA_TFLAG_LBA48) { | |
269 | block |= (u64)tf->hob_lbah << 40; | |
270 | block |= (u64)tf->hob_lbam << 32; | |
271 | block |= tf->hob_lbal << 24; | |
272 | } else | |
273 | block |= (tf->device & 0xf) << 24; | |
274 | ||
275 | block |= tf->lbah << 16; | |
276 | block |= tf->lbam << 8; | |
277 | block |= tf->lbal; | |
278 | } else { | |
279 | u32 cyl, head, sect; | |
280 | ||
281 | cyl = tf->lbam | (tf->lbah << 8); | |
282 | head = tf->device & 0xf; | |
283 | sect = tf->lbal; | |
284 | ||
285 | block = (cyl * dev->heads + head) * dev->sectors + sect; | |
286 | } | |
287 | ||
288 | return block; | |
289 | } | |
290 | ||
bd056d7e TH |
291 | /** |
292 | * ata_build_rw_tf - Build ATA taskfile for given read/write request | |
293 | * @tf: Target ATA taskfile | |
294 | * @dev: ATA device @tf belongs to | |
295 | * @block: Block address | |
296 | * @n_block: Number of blocks | |
297 | * @tf_flags: RW/FUA etc... | |
298 | * @tag: tag | |
299 | * | |
300 | * LOCKING: | |
301 | * None. | |
302 | * | |
303 | * Build ATA taskfile @tf for read/write request described by | |
304 | * @block, @n_block, @tf_flags and @tag on @dev. | |
305 | * | |
306 | * RETURNS: | |
307 | * | |
308 | * 0 on success, -ERANGE if the request is too large for @dev, | |
309 | * -EINVAL if the request is invalid. | |
310 | */ | |
311 | int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, | |
312 | u64 block, u32 n_block, unsigned int tf_flags, | |
313 | unsigned int tag) | |
314 | { | |
315 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
316 | tf->flags |= tf_flags; | |
317 | ||
6d1245bf | 318 | if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
bd056d7e TH |
319 | /* yay, NCQ */ |
320 | if (!lba_48_ok(block, n_block)) | |
321 | return -ERANGE; | |
322 | ||
323 | tf->protocol = ATA_PROT_NCQ; | |
324 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
325 | ||
326 | if (tf->flags & ATA_TFLAG_WRITE) | |
327 | tf->command = ATA_CMD_FPDMA_WRITE; | |
328 | else | |
329 | tf->command = ATA_CMD_FPDMA_READ; | |
330 | ||
331 | tf->nsect = tag << 3; | |
332 | tf->hob_feature = (n_block >> 8) & 0xff; | |
333 | tf->feature = n_block & 0xff; | |
334 | ||
335 | tf->hob_lbah = (block >> 40) & 0xff; | |
336 | tf->hob_lbam = (block >> 32) & 0xff; | |
337 | tf->hob_lbal = (block >> 24) & 0xff; | |
338 | tf->lbah = (block >> 16) & 0xff; | |
339 | tf->lbam = (block >> 8) & 0xff; | |
340 | tf->lbal = block & 0xff; | |
341 | ||
342 | tf->device = 1 << 6; | |
343 | if (tf->flags & ATA_TFLAG_FUA) | |
344 | tf->device |= 1 << 7; | |
345 | } else if (dev->flags & ATA_DFLAG_LBA) { | |
346 | tf->flags |= ATA_TFLAG_LBA; | |
347 | ||
348 | if (lba_28_ok(block, n_block)) { | |
349 | /* use LBA28 */ | |
350 | tf->device |= (block >> 24) & 0xf; | |
351 | } else if (lba_48_ok(block, n_block)) { | |
352 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
353 | return -ERANGE; | |
354 | ||
355 | /* use LBA48 */ | |
356 | tf->flags |= ATA_TFLAG_LBA48; | |
357 | ||
358 | tf->hob_nsect = (n_block >> 8) & 0xff; | |
359 | ||
360 | tf->hob_lbah = (block >> 40) & 0xff; | |
361 | tf->hob_lbam = (block >> 32) & 0xff; | |
362 | tf->hob_lbal = (block >> 24) & 0xff; | |
363 | } else | |
364 | /* request too large even for LBA48 */ | |
365 | return -ERANGE; | |
366 | ||
367 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
368 | return -EINVAL; | |
369 | ||
370 | tf->nsect = n_block & 0xff; | |
371 | ||
372 | tf->lbah = (block >> 16) & 0xff; | |
373 | tf->lbam = (block >> 8) & 0xff; | |
374 | tf->lbal = block & 0xff; | |
375 | ||
376 | tf->device |= ATA_LBA; | |
377 | } else { | |
378 | /* CHS */ | |
379 | u32 sect, head, cyl, track; | |
380 | ||
381 | /* The request -may- be too large for CHS addressing. */ | |
382 | if (!lba_28_ok(block, n_block)) | |
383 | return -ERANGE; | |
384 | ||
385 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
386 | return -EINVAL; | |
387 | ||
388 | /* Convert LBA to CHS */ | |
389 | track = (u32)block / dev->sectors; | |
390 | cyl = track / dev->heads; | |
391 | head = track % dev->heads; | |
392 | sect = (u32)block % dev->sectors + 1; | |
393 | ||
394 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", | |
395 | (u32)block, track, cyl, head, sect); | |
396 | ||
397 | /* Check whether the converted CHS can fit. | |
398 | Cylinder: 0-65535 | |
399 | Head: 0-15 | |
400 | Sector: 1-255*/ | |
401 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
402 | return -ERANGE; | |
403 | ||
404 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
405 | tf->lbal = sect; | |
406 | tf->lbam = cyl; | |
407 | tf->lbah = cyl >> 8; | |
408 | tf->device |= head; | |
409 | } | |
410 | ||
411 | return 0; | |
412 | } | |
413 | ||
cb95d562 TH |
414 | /** |
415 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
416 | * @pio_mask: pio_mask | |
417 | * @mwdma_mask: mwdma_mask | |
418 | * @udma_mask: udma_mask | |
419 | * | |
420 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
421 | * unsigned int xfer_mask. | |
422 | * | |
423 | * LOCKING: | |
424 | * None. | |
425 | * | |
426 | * RETURNS: | |
427 | * Packed xfer_mask. | |
428 | */ | |
429 | static unsigned int ata_pack_xfermask(unsigned int pio_mask, | |
430 | unsigned int mwdma_mask, | |
431 | unsigned int udma_mask) | |
432 | { | |
433 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
434 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
435 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
436 | } | |
437 | ||
c0489e4e TH |
438 | /** |
439 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
440 | * @xfer_mask: xfer_mask to unpack | |
441 | * @pio_mask: resulting pio_mask | |
442 | * @mwdma_mask: resulting mwdma_mask | |
443 | * @udma_mask: resulting udma_mask | |
444 | * | |
445 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
446 | * Any NULL distination masks will be ignored. | |
447 | */ | |
448 | static void ata_unpack_xfermask(unsigned int xfer_mask, | |
449 | unsigned int *pio_mask, | |
450 | unsigned int *mwdma_mask, | |
451 | unsigned int *udma_mask) | |
452 | { | |
453 | if (pio_mask) | |
454 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
455 | if (mwdma_mask) | |
456 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
457 | if (udma_mask) | |
458 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
459 | } | |
460 | ||
cb95d562 | 461 | static const struct ata_xfer_ent { |
be9a50c8 | 462 | int shift, bits; |
cb95d562 TH |
463 | u8 base; |
464 | } ata_xfer_tbl[] = { | |
465 | { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, | |
466 | { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, | |
467 | { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, | |
468 | { -1, }, | |
469 | }; | |
470 | ||
471 | /** | |
472 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
473 | * @xfer_mask: xfer_mask of interest | |
474 | * | |
475 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
476 | * bit of @xfer_mask is considered. | |
477 | * | |
478 | * LOCKING: | |
479 | * None. | |
480 | * | |
481 | * RETURNS: | |
482 | * Matching XFER_* value, 0 if no match found. | |
483 | */ | |
484 | static u8 ata_xfer_mask2mode(unsigned int xfer_mask) | |
485 | { | |
486 | int highbit = fls(xfer_mask) - 1; | |
487 | const struct ata_xfer_ent *ent; | |
488 | ||
489 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
490 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
491 | return ent->base + highbit - ent->shift; | |
492 | return 0; | |
493 | } | |
494 | ||
495 | /** | |
496 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
497 | * @xfer_mode: XFER_* of interest | |
498 | * | |
499 | * Return matching xfer_mask for @xfer_mode. | |
500 | * | |
501 | * LOCKING: | |
502 | * None. | |
503 | * | |
504 | * RETURNS: | |
505 | * Matching xfer_mask, 0 if no match found. | |
506 | */ | |
507 | static unsigned int ata_xfer_mode2mask(u8 xfer_mode) | |
508 | { | |
509 | const struct ata_xfer_ent *ent; | |
510 | ||
511 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
512 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
513 | return 1 << (ent->shift + xfer_mode - ent->base); | |
514 | return 0; | |
515 | } | |
516 | ||
517 | /** | |
518 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
519 | * @xfer_mode: XFER_* of interest | |
520 | * | |
521 | * Return matching xfer_shift for @xfer_mode. | |
522 | * | |
523 | * LOCKING: | |
524 | * None. | |
525 | * | |
526 | * RETURNS: | |
527 | * Matching xfer_shift, -1 if no match found. | |
528 | */ | |
529 | static int ata_xfer_mode2shift(unsigned int xfer_mode) | |
530 | { | |
531 | const struct ata_xfer_ent *ent; | |
532 | ||
533 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
534 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
535 | return ent->shift; | |
536 | return -1; | |
537 | } | |
538 | ||
1da177e4 | 539 | /** |
1da7b0d0 TH |
540 | * ata_mode_string - convert xfer_mask to string |
541 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
1da177e4 LT |
542 | * |
543 | * Determine string which represents the highest speed | |
1da7b0d0 | 544 | * (highest bit in @modemask). |
1da177e4 LT |
545 | * |
546 | * LOCKING: | |
547 | * None. | |
548 | * | |
549 | * RETURNS: | |
550 | * Constant C string representing highest speed listed in | |
1da7b0d0 | 551 | * @mode_mask, or the constant C string "<n/a>". |
1da177e4 | 552 | */ |
1da7b0d0 | 553 | static const char *ata_mode_string(unsigned int xfer_mask) |
1da177e4 | 554 | { |
75f554bc TH |
555 | static const char * const xfer_mode_str[] = { |
556 | "PIO0", | |
557 | "PIO1", | |
558 | "PIO2", | |
559 | "PIO3", | |
560 | "PIO4", | |
b352e57d AC |
561 | "PIO5", |
562 | "PIO6", | |
75f554bc TH |
563 | "MWDMA0", |
564 | "MWDMA1", | |
565 | "MWDMA2", | |
b352e57d AC |
566 | "MWDMA3", |
567 | "MWDMA4", | |
75f554bc TH |
568 | "UDMA/16", |
569 | "UDMA/25", | |
570 | "UDMA/33", | |
571 | "UDMA/44", | |
572 | "UDMA/66", | |
573 | "UDMA/100", | |
574 | "UDMA/133", | |
575 | "UDMA7", | |
576 | }; | |
1da7b0d0 | 577 | int highbit; |
1da177e4 | 578 | |
1da7b0d0 TH |
579 | highbit = fls(xfer_mask) - 1; |
580 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
581 | return xfer_mode_str[highbit]; | |
1da177e4 | 582 | return "<n/a>"; |
1da177e4 LT |
583 | } |
584 | ||
4c360c81 TH |
585 | static const char *sata_spd_string(unsigned int spd) |
586 | { | |
587 | static const char * const spd_str[] = { | |
588 | "1.5 Gbps", | |
589 | "3.0 Gbps", | |
590 | }; | |
591 | ||
592 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) | |
593 | return "<unknown>"; | |
594 | return spd_str[spd - 1]; | |
595 | } | |
596 | ||
3373efd8 | 597 | void ata_dev_disable(struct ata_device *dev) |
0b8efb0a | 598 | { |
0dd4b21f | 599 | if (ata_dev_enabled(dev) && ata_msg_drv(dev->ap)) { |
f15a1daf | 600 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
4ae72a1e TH |
601 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | |
602 | ATA_DNXFER_QUIET); | |
0b8efb0a TH |
603 | dev->class++; |
604 | } | |
605 | } | |
606 | ||
1da177e4 | 607 | /** |
0d5ff566 | 608 | * ata_devchk - PATA device presence detection |
1da177e4 LT |
609 | * @ap: ATA channel to examine |
610 | * @device: Device to examine (starting at zero) | |
611 | * | |
612 | * This technique was originally described in | |
613 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
614 | * later found its way into the ATA/ATAPI spec. | |
615 | * | |
616 | * Write a pattern to the ATA shadow registers, | |
617 | * and if a device is present, it will respond by | |
618 | * correctly storing and echoing back the | |
619 | * ATA shadow register contents. | |
620 | * | |
621 | * LOCKING: | |
622 | * caller. | |
623 | */ | |
624 | ||
0d5ff566 | 625 | static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) |
1da177e4 LT |
626 | { |
627 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
628 | u8 nsect, lbal; | |
629 | ||
630 | ap->ops->dev_select(ap, device); | |
631 | ||
0d5ff566 TH |
632 | iowrite8(0x55, ioaddr->nsect_addr); |
633 | iowrite8(0xaa, ioaddr->lbal_addr); | |
1da177e4 | 634 | |
0d5ff566 TH |
635 | iowrite8(0xaa, ioaddr->nsect_addr); |
636 | iowrite8(0x55, ioaddr->lbal_addr); | |
1da177e4 | 637 | |
0d5ff566 TH |
638 | iowrite8(0x55, ioaddr->nsect_addr); |
639 | iowrite8(0xaa, ioaddr->lbal_addr); | |
1da177e4 | 640 | |
0d5ff566 TH |
641 | nsect = ioread8(ioaddr->nsect_addr); |
642 | lbal = ioread8(ioaddr->lbal_addr); | |
1da177e4 LT |
643 | |
644 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
645 | return 1; /* we found a device */ | |
646 | ||
647 | return 0; /* nothing found */ | |
648 | } | |
649 | ||
1da177e4 LT |
650 | /** |
651 | * ata_dev_classify - determine device type based on ATA-spec signature | |
652 | * @tf: ATA taskfile register set for device to be identified | |
653 | * | |
654 | * Determine from taskfile register contents whether a device is | |
655 | * ATA or ATAPI, as per "Signature and persistence" section | |
656 | * of ATA/PI spec (volume 1, sect 5.14). | |
657 | * | |
658 | * LOCKING: | |
659 | * None. | |
660 | * | |
661 | * RETURNS: | |
662 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN | |
663 | * the event of failure. | |
664 | */ | |
665 | ||
057ace5e | 666 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
667 | { |
668 | /* Apple's open source Darwin code hints that some devices only | |
669 | * put a proper signature into the LBA mid/high registers, | |
670 | * So, we only check those. It's sufficient for uniqueness. | |
671 | */ | |
672 | ||
673 | if (((tf->lbam == 0) && (tf->lbah == 0)) || | |
674 | ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { | |
675 | DPRINTK("found ATA device by sig\n"); | |
676 | return ATA_DEV_ATA; | |
677 | } | |
678 | ||
679 | if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || | |
680 | ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { | |
681 | DPRINTK("found ATAPI device by sig\n"); | |
682 | return ATA_DEV_ATAPI; | |
683 | } | |
684 | ||
685 | DPRINTK("unknown device\n"); | |
686 | return ATA_DEV_UNKNOWN; | |
687 | } | |
688 | ||
689 | /** | |
690 | * ata_dev_try_classify - Parse returned ATA device signature | |
691 | * @ap: ATA channel to examine | |
692 | * @device: Device to examine (starting at zero) | |
b4dc7623 | 693 | * @r_err: Value of error register on completion |
1da177e4 LT |
694 | * |
695 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, | |
696 | * an ATA/ATAPI-defined set of values is placed in the ATA | |
697 | * shadow registers, indicating the results of device detection | |
698 | * and diagnostics. | |
699 | * | |
700 | * Select the ATA device, and read the values from the ATA shadow | |
701 | * registers. Then parse according to the Error register value, | |
702 | * and the spec-defined values examined by ata_dev_classify(). | |
703 | * | |
704 | * LOCKING: | |
705 | * caller. | |
b4dc7623 TH |
706 | * |
707 | * RETURNS: | |
708 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. | |
1da177e4 LT |
709 | */ |
710 | ||
a619f981 | 711 | unsigned int |
b4dc7623 | 712 | ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err) |
1da177e4 | 713 | { |
1da177e4 LT |
714 | struct ata_taskfile tf; |
715 | unsigned int class; | |
716 | u8 err; | |
717 | ||
718 | ap->ops->dev_select(ap, device); | |
719 | ||
720 | memset(&tf, 0, sizeof(tf)); | |
721 | ||
1da177e4 | 722 | ap->ops->tf_read(ap, &tf); |
0169e284 | 723 | err = tf.feature; |
b4dc7623 TH |
724 | if (r_err) |
725 | *r_err = err; | |
1da177e4 | 726 | |
93590859 AC |
727 | /* see if device passed diags: if master then continue and warn later */ |
728 | if (err == 0 && device == 0) | |
729 | /* diagnostic fail : do nothing _YET_ */ | |
730 | ap->device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC; | |
731 | else if (err == 1) | |
1da177e4 LT |
732 | /* do nothing */ ; |
733 | else if ((device == 0) && (err == 0x81)) | |
734 | /* do nothing */ ; | |
735 | else | |
b4dc7623 | 736 | return ATA_DEV_NONE; |
1da177e4 | 737 | |
b4dc7623 | 738 | /* determine if device is ATA or ATAPI */ |
1da177e4 | 739 | class = ata_dev_classify(&tf); |
b4dc7623 | 740 | |
1da177e4 | 741 | if (class == ATA_DEV_UNKNOWN) |
b4dc7623 | 742 | return ATA_DEV_NONE; |
1da177e4 | 743 | if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) |
b4dc7623 TH |
744 | return ATA_DEV_NONE; |
745 | return class; | |
1da177e4 LT |
746 | } |
747 | ||
748 | /** | |
6a62a04d | 749 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
750 | * @id: IDENTIFY DEVICE results we will examine |
751 | * @s: string into which data is output | |
752 | * @ofs: offset into identify device page | |
753 | * @len: length of string to return. must be an even number. | |
754 | * | |
755 | * The strings in the IDENTIFY DEVICE page are broken up into | |
756 | * 16-bit chunks. Run through the string, and output each | |
757 | * 8-bit chunk linearly, regardless of platform. | |
758 | * | |
759 | * LOCKING: | |
760 | * caller. | |
761 | */ | |
762 | ||
6a62a04d TH |
763 | void ata_id_string(const u16 *id, unsigned char *s, |
764 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
765 | { |
766 | unsigned int c; | |
767 | ||
768 | while (len > 0) { | |
769 | c = id[ofs] >> 8; | |
770 | *s = c; | |
771 | s++; | |
772 | ||
773 | c = id[ofs] & 0xff; | |
774 | *s = c; | |
775 | s++; | |
776 | ||
777 | ofs++; | |
778 | len -= 2; | |
779 | } | |
780 | } | |
781 | ||
0e949ff3 | 782 | /** |
6a62a04d | 783 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
784 | * @id: IDENTIFY DEVICE results we will examine |
785 | * @s: string into which data is output | |
786 | * @ofs: offset into identify device page | |
787 | * @len: length of string to return. must be an odd number. | |
788 | * | |
6a62a04d | 789 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
790 | * trims trailing spaces and terminates the resulting string with |
791 | * null. @len must be actual maximum length (even number) + 1. | |
792 | * | |
793 | * LOCKING: | |
794 | * caller. | |
795 | */ | |
6a62a04d TH |
796 | void ata_id_c_string(const u16 *id, unsigned char *s, |
797 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
798 | { |
799 | unsigned char *p; | |
800 | ||
801 | WARN_ON(!(len & 1)); | |
802 | ||
6a62a04d | 803 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
804 | |
805 | p = s + strnlen(s, len - 1); | |
806 | while (p > s && p[-1] == ' ') | |
807 | p--; | |
808 | *p = '\0'; | |
809 | } | |
0baab86b | 810 | |
2940740b TH |
811 | static u64 ata_id_n_sectors(const u16 *id) |
812 | { | |
813 | if (ata_id_has_lba(id)) { | |
814 | if (ata_id_has_lba48(id)) | |
815 | return ata_id_u64(id, 100); | |
816 | else | |
817 | return ata_id_u32(id, 60); | |
818 | } else { | |
819 | if (ata_id_current_chs_valid(id)) | |
820 | return ata_id_u32(id, 57); | |
821 | else | |
822 | return id[1] * id[3] * id[6]; | |
823 | } | |
824 | } | |
825 | ||
10305f0f A |
826 | /** |
827 | * ata_id_to_dma_mode - Identify DMA mode from id block | |
828 | * @dev: device to identify | |
cc261267 | 829 | * @unknown: mode to assume if we cannot tell |
10305f0f A |
830 | * |
831 | * Set up the timing values for the device based upon the identify | |
832 | * reported values for the DMA mode. This function is used by drivers | |
833 | * which rely upon firmware configured modes, but wish to report the | |
834 | * mode correctly when possible. | |
835 | * | |
836 | * In addition we emit similarly formatted messages to the default | |
837 | * ata_dev_set_mode handler, in order to provide consistency of | |
838 | * presentation. | |
839 | */ | |
840 | ||
841 | void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown) | |
842 | { | |
843 | unsigned int mask; | |
844 | u8 mode; | |
845 | ||
846 | /* Pack the DMA modes */ | |
847 | mask = ((dev->id[63] >> 8) << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA; | |
848 | if (dev->id[53] & 0x04) | |
849 | mask |= ((dev->id[88] >> 8) << ATA_SHIFT_UDMA) & ATA_MASK_UDMA; | |
850 | ||
851 | /* Select the mode in use */ | |
852 | mode = ata_xfer_mask2mode(mask); | |
853 | ||
854 | if (mode != 0) { | |
855 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", | |
856 | ata_mode_string(mask)); | |
857 | } else { | |
858 | /* SWDMA perhaps ? */ | |
859 | mode = unknown; | |
860 | ata_dev_printk(dev, KERN_INFO, "configured for DMA\n"); | |
861 | } | |
862 | ||
863 | /* Configure the device reporting */ | |
864 | dev->xfer_mode = mode; | |
865 | dev->xfer_shift = ata_xfer_mode2shift(mode); | |
866 | } | |
867 | ||
0baab86b EF |
868 | /** |
869 | * ata_noop_dev_select - Select device 0/1 on ATA bus | |
870 | * @ap: ATA channel to manipulate | |
871 | * @device: ATA device (numbered from zero) to select | |
872 | * | |
873 | * This function performs no actual function. | |
874 | * | |
875 | * May be used as the dev_select() entry in ata_port_operations. | |
876 | * | |
877 | * LOCKING: | |
878 | * caller. | |
879 | */ | |
1da177e4 LT |
880 | void ata_noop_dev_select (struct ata_port *ap, unsigned int device) |
881 | { | |
882 | } | |
883 | ||
0baab86b | 884 | |
1da177e4 LT |
885 | /** |
886 | * ata_std_dev_select - Select device 0/1 on ATA bus | |
887 | * @ap: ATA channel to manipulate | |
888 | * @device: ATA device (numbered from zero) to select | |
889 | * | |
890 | * Use the method defined in the ATA specification to | |
891 | * make either device 0, or device 1, active on the | |
0baab86b EF |
892 | * ATA channel. Works with both PIO and MMIO. |
893 | * | |
894 | * May be used as the dev_select() entry in ata_port_operations. | |
1da177e4 LT |
895 | * |
896 | * LOCKING: | |
897 | * caller. | |
898 | */ | |
899 | ||
900 | void ata_std_dev_select (struct ata_port *ap, unsigned int device) | |
901 | { | |
902 | u8 tmp; | |
903 | ||
904 | if (device == 0) | |
905 | tmp = ATA_DEVICE_OBS; | |
906 | else | |
907 | tmp = ATA_DEVICE_OBS | ATA_DEV1; | |
908 | ||
0d5ff566 | 909 | iowrite8(tmp, ap->ioaddr.device_addr); |
1da177e4 LT |
910 | ata_pause(ap); /* needed; also flushes, for mmio */ |
911 | } | |
912 | ||
913 | /** | |
914 | * ata_dev_select - Select device 0/1 on ATA bus | |
915 | * @ap: ATA channel to manipulate | |
916 | * @device: ATA device (numbered from zero) to select | |
917 | * @wait: non-zero to wait for Status register BSY bit to clear | |
918 | * @can_sleep: non-zero if context allows sleeping | |
919 | * | |
920 | * Use the method defined in the ATA specification to | |
921 | * make either device 0, or device 1, active on the | |
922 | * ATA channel. | |
923 | * | |
924 | * This is a high-level version of ata_std_dev_select(), | |
925 | * which additionally provides the services of inserting | |
926 | * the proper pauses and status polling, where needed. | |
927 | * | |
928 | * LOCKING: | |
929 | * caller. | |
930 | */ | |
931 | ||
932 | void ata_dev_select(struct ata_port *ap, unsigned int device, | |
933 | unsigned int wait, unsigned int can_sleep) | |
934 | { | |
88574551 | 935 | if (ata_msg_probe(ap)) |
44877b4e TH |
936 | ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " |
937 | "device %u, wait %u\n", device, wait); | |
1da177e4 LT |
938 | |
939 | if (wait) | |
940 | ata_wait_idle(ap); | |
941 | ||
942 | ap->ops->dev_select(ap, device); | |
943 | ||
944 | if (wait) { | |
945 | if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) | |
946 | msleep(150); | |
947 | ata_wait_idle(ap); | |
948 | } | |
949 | } | |
950 | ||
951 | /** | |
952 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 953 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 954 | * |
0bd3300a TH |
955 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
956 | * page. | |
1da177e4 LT |
957 | * |
958 | * LOCKING: | |
959 | * caller. | |
960 | */ | |
961 | ||
0bd3300a | 962 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
963 | { |
964 | DPRINTK("49==0x%04x " | |
965 | "53==0x%04x " | |
966 | "63==0x%04x " | |
967 | "64==0x%04x " | |
968 | "75==0x%04x \n", | |
0bd3300a TH |
969 | id[49], |
970 | id[53], | |
971 | id[63], | |
972 | id[64], | |
973 | id[75]); | |
1da177e4 LT |
974 | DPRINTK("80==0x%04x " |
975 | "81==0x%04x " | |
976 | "82==0x%04x " | |
977 | "83==0x%04x " | |
978 | "84==0x%04x \n", | |
0bd3300a TH |
979 | id[80], |
980 | id[81], | |
981 | id[82], | |
982 | id[83], | |
983 | id[84]); | |
1da177e4 LT |
984 | DPRINTK("88==0x%04x " |
985 | "93==0x%04x\n", | |
0bd3300a TH |
986 | id[88], |
987 | id[93]); | |
1da177e4 LT |
988 | } |
989 | ||
cb95d562 TH |
990 | /** |
991 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
992 | * @id: IDENTIFY data to compute xfer mask from | |
993 | * | |
994 | * Compute the xfermask for this device. This is not as trivial | |
995 | * as it seems if we must consider early devices correctly. | |
996 | * | |
997 | * FIXME: pre IDE drive timing (do we care ?). | |
998 | * | |
999 | * LOCKING: | |
1000 | * None. | |
1001 | * | |
1002 | * RETURNS: | |
1003 | * Computed xfermask | |
1004 | */ | |
1005 | static unsigned int ata_id_xfermask(const u16 *id) | |
1006 | { | |
1007 | unsigned int pio_mask, mwdma_mask, udma_mask; | |
1008 | ||
1009 | /* Usual case. Word 53 indicates word 64 is valid */ | |
1010 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
1011 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
1012 | pio_mask <<= 3; | |
1013 | pio_mask |= 0x7; | |
1014 | } else { | |
1015 | /* If word 64 isn't valid then Word 51 high byte holds | |
1016 | * the PIO timing number for the maximum. Turn it into | |
1017 | * a mask. | |
1018 | */ | |
7a0f1c8a | 1019 | u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
46767aeb AC |
1020 | if (mode < 5) /* Valid PIO range */ |
1021 | pio_mask = (2 << mode) - 1; | |
1022 | else | |
1023 | pio_mask = 1; | |
cb95d562 TH |
1024 | |
1025 | /* But wait.. there's more. Design your standards by | |
1026 | * committee and you too can get a free iordy field to | |
1027 | * process. However its the speeds not the modes that | |
1028 | * are supported... Note drivers using the timing API | |
1029 | * will get this right anyway | |
1030 | */ | |
1031 | } | |
1032 | ||
1033 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
fb21f0d0 | 1034 | |
b352e57d AC |
1035 | if (ata_id_is_cfa(id)) { |
1036 | /* | |
1037 | * Process compact flash extended modes | |
1038 | */ | |
1039 | int pio = id[163] & 0x7; | |
1040 | int dma = (id[163] >> 3) & 7; | |
1041 | ||
1042 | if (pio) | |
1043 | pio_mask |= (1 << 5); | |
1044 | if (pio > 1) | |
1045 | pio_mask |= (1 << 6); | |
1046 | if (dma) | |
1047 | mwdma_mask |= (1 << 3); | |
1048 | if (dma > 1) | |
1049 | mwdma_mask |= (1 << 4); | |
1050 | } | |
1051 | ||
fb21f0d0 TH |
1052 | udma_mask = 0; |
1053 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
1054 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
cb95d562 TH |
1055 | |
1056 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
1057 | } | |
1058 | ||
86e45b6b TH |
1059 | /** |
1060 | * ata_port_queue_task - Queue port_task | |
1061 | * @ap: The ata_port to queue port_task for | |
e2a7f77a | 1062 | * @fn: workqueue function to be scheduled |
65f27f38 | 1063 | * @data: data for @fn to use |
e2a7f77a | 1064 | * @delay: delay time for workqueue function |
86e45b6b TH |
1065 | * |
1066 | * Schedule @fn(@data) for execution after @delay jiffies using | |
1067 | * port_task. There is one port_task per port and it's the | |
1068 | * user(low level driver)'s responsibility to make sure that only | |
1069 | * one task is active at any given time. | |
1070 | * | |
1071 | * libata core layer takes care of synchronization between | |
1072 | * port_task and EH. ata_port_queue_task() may be ignored for EH | |
1073 | * synchronization. | |
1074 | * | |
1075 | * LOCKING: | |
1076 | * Inherited from caller. | |
1077 | */ | |
65f27f38 | 1078 | void ata_port_queue_task(struct ata_port *ap, work_func_t fn, void *data, |
86e45b6b TH |
1079 | unsigned long delay) |
1080 | { | |
1081 | int rc; | |
1082 | ||
b51e9e5d | 1083 | if (ap->pflags & ATA_PFLAG_FLUSH_PORT_TASK) |
86e45b6b TH |
1084 | return; |
1085 | ||
65f27f38 DH |
1086 | PREPARE_DELAYED_WORK(&ap->port_task, fn); |
1087 | ap->port_task_data = data; | |
86e45b6b | 1088 | |
52bad64d | 1089 | rc = queue_delayed_work(ata_wq, &ap->port_task, delay); |
86e45b6b TH |
1090 | |
1091 | /* rc == 0 means that another user is using port task */ | |
1092 | WARN_ON(rc == 0); | |
1093 | } | |
1094 | ||
1095 | /** | |
1096 | * ata_port_flush_task - Flush port_task | |
1097 | * @ap: The ata_port to flush port_task for | |
1098 | * | |
1099 | * After this function completes, port_task is guranteed not to | |
1100 | * be running or scheduled. | |
1101 | * | |
1102 | * LOCKING: | |
1103 | * Kernel thread context (may sleep) | |
1104 | */ | |
1105 | void ata_port_flush_task(struct ata_port *ap) | |
1106 | { | |
1107 | unsigned long flags; | |
1108 | ||
1109 | DPRINTK("ENTER\n"); | |
1110 | ||
ba6a1308 | 1111 | spin_lock_irqsave(ap->lock, flags); |
b51e9e5d | 1112 | ap->pflags |= ATA_PFLAG_FLUSH_PORT_TASK; |
ba6a1308 | 1113 | spin_unlock_irqrestore(ap->lock, flags); |
86e45b6b TH |
1114 | |
1115 | DPRINTK("flush #1\n"); | |
1116 | flush_workqueue(ata_wq); | |
1117 | ||
1118 | /* | |
1119 | * At this point, if a task is running, it's guaranteed to see | |
1120 | * the FLUSH flag; thus, it will never queue pio tasks again. | |
1121 | * Cancel and flush. | |
1122 | */ | |
1123 | if (!cancel_delayed_work(&ap->port_task)) { | |
0dd4b21f | 1124 | if (ata_msg_ctl(ap)) |
88574551 TH |
1125 | ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n", |
1126 | __FUNCTION__); | |
86e45b6b TH |
1127 | flush_workqueue(ata_wq); |
1128 | } | |
1129 | ||
ba6a1308 | 1130 | spin_lock_irqsave(ap->lock, flags); |
b51e9e5d | 1131 | ap->pflags &= ~ATA_PFLAG_FLUSH_PORT_TASK; |
ba6a1308 | 1132 | spin_unlock_irqrestore(ap->lock, flags); |
86e45b6b | 1133 | |
0dd4b21f BP |
1134 | if (ata_msg_ctl(ap)) |
1135 | ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); | |
86e45b6b TH |
1136 | } |
1137 | ||
7102d230 | 1138 | static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 1139 | { |
77853bf2 | 1140 | struct completion *waiting = qc->private_data; |
a2a7a662 | 1141 | |
a2a7a662 | 1142 | complete(waiting); |
a2a7a662 TH |
1143 | } |
1144 | ||
1145 | /** | |
2432697b | 1146 | * ata_exec_internal_sg - execute libata internal command |
a2a7a662 TH |
1147 | * @dev: Device to which the command is sent |
1148 | * @tf: Taskfile registers for the command and the result | |
d69cf37d | 1149 | * @cdb: CDB for packet command |
a2a7a662 | 1150 | * @dma_dir: Data tranfer direction of the command |
2432697b TH |
1151 | * @sg: sg list for the data buffer of the command |
1152 | * @n_elem: Number of sg entries | |
a2a7a662 TH |
1153 | * |
1154 | * Executes libata internal command with timeout. @tf contains | |
1155 | * command on entry and result on return. Timeout and error | |
1156 | * conditions are reported via return value. No recovery action | |
1157 | * is taken after a command times out. It's caller's duty to | |
1158 | * clean up after timeout. | |
1159 | * | |
1160 | * LOCKING: | |
1161 | * None. Should be called with kernel context, might sleep. | |
551e8889 TH |
1162 | * |
1163 | * RETURNS: | |
1164 | * Zero on success, AC_ERR_* mask on failure | |
a2a7a662 | 1165 | */ |
2432697b TH |
1166 | unsigned ata_exec_internal_sg(struct ata_device *dev, |
1167 | struct ata_taskfile *tf, const u8 *cdb, | |
1168 | int dma_dir, struct scatterlist *sg, | |
1169 | unsigned int n_elem) | |
a2a7a662 | 1170 | { |
3373efd8 | 1171 | struct ata_port *ap = dev->ap; |
a2a7a662 TH |
1172 | u8 command = tf->command; |
1173 | struct ata_queued_cmd *qc; | |
2ab7db1f | 1174 | unsigned int tag, preempted_tag; |
dedaf2b0 | 1175 | u32 preempted_sactive, preempted_qc_active; |
60be6b9a | 1176 | DECLARE_COMPLETION_ONSTACK(wait); |
a2a7a662 | 1177 | unsigned long flags; |
77853bf2 | 1178 | unsigned int err_mask; |
d95a717f | 1179 | int rc; |
a2a7a662 | 1180 | |
ba6a1308 | 1181 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 | 1182 | |
e3180499 | 1183 | /* no internal command while frozen */ |
b51e9e5d | 1184 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
ba6a1308 | 1185 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1186 | return AC_ERR_SYSTEM; |
1187 | } | |
1188 | ||
2ab7db1f | 1189 | /* initialize internal qc */ |
a2a7a662 | 1190 | |
2ab7db1f TH |
1191 | /* XXX: Tag 0 is used for drivers with legacy EH as some |
1192 | * drivers choke if any other tag is given. This breaks | |
1193 | * ata_tag_internal() test for those drivers. Don't use new | |
1194 | * EH stuff without converting to it. | |
1195 | */ | |
1196 | if (ap->ops->error_handler) | |
1197 | tag = ATA_TAG_INTERNAL; | |
1198 | else | |
1199 | tag = 0; | |
1200 | ||
6cec4a39 | 1201 | if (test_and_set_bit(tag, &ap->qc_allocated)) |
2ab7db1f | 1202 | BUG(); |
f69499f4 | 1203 | qc = __ata_qc_from_tag(ap, tag); |
2ab7db1f TH |
1204 | |
1205 | qc->tag = tag; | |
1206 | qc->scsicmd = NULL; | |
1207 | qc->ap = ap; | |
1208 | qc->dev = dev; | |
1209 | ata_qc_reinit(qc); | |
1210 | ||
1211 | preempted_tag = ap->active_tag; | |
dedaf2b0 TH |
1212 | preempted_sactive = ap->sactive; |
1213 | preempted_qc_active = ap->qc_active; | |
2ab7db1f | 1214 | ap->active_tag = ATA_TAG_POISON; |
dedaf2b0 TH |
1215 | ap->sactive = 0; |
1216 | ap->qc_active = 0; | |
2ab7db1f TH |
1217 | |
1218 | /* prepare & issue qc */ | |
a2a7a662 | 1219 | qc->tf = *tf; |
d69cf37d TH |
1220 | if (cdb) |
1221 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); | |
e61e0672 | 1222 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
a2a7a662 TH |
1223 | qc->dma_dir = dma_dir; |
1224 | if (dma_dir != DMA_NONE) { | |
2432697b TH |
1225 | unsigned int i, buflen = 0; |
1226 | ||
1227 | for (i = 0; i < n_elem; i++) | |
1228 | buflen += sg[i].length; | |
1229 | ||
1230 | ata_sg_init(qc, sg, n_elem); | |
49c80429 | 1231 | qc->nbytes = buflen; |
a2a7a662 TH |
1232 | } |
1233 | ||
77853bf2 | 1234 | qc->private_data = &wait; |
a2a7a662 TH |
1235 | qc->complete_fn = ata_qc_complete_internal; |
1236 | ||
8e0e694a | 1237 | ata_qc_issue(qc); |
a2a7a662 | 1238 | |
ba6a1308 | 1239 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 | 1240 | |
a8601e5f | 1241 | rc = wait_for_completion_timeout(&wait, ata_probe_timeout); |
d95a717f TH |
1242 | |
1243 | ata_port_flush_task(ap); | |
41ade50c | 1244 | |
d95a717f | 1245 | if (!rc) { |
ba6a1308 | 1246 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 TH |
1247 | |
1248 | /* We're racing with irq here. If we lose, the | |
1249 | * following test prevents us from completing the qc | |
d95a717f TH |
1250 | * twice. If we win, the port is frozen and will be |
1251 | * cleaned up by ->post_internal_cmd(). | |
a2a7a662 | 1252 | */ |
77853bf2 | 1253 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
d95a717f TH |
1254 | qc->err_mask |= AC_ERR_TIMEOUT; |
1255 | ||
1256 | if (ap->ops->error_handler) | |
1257 | ata_port_freeze(ap); | |
1258 | else | |
1259 | ata_qc_complete(qc); | |
f15a1daf | 1260 | |
0dd4b21f BP |
1261 | if (ata_msg_warn(ap)) |
1262 | ata_dev_printk(dev, KERN_WARNING, | |
88574551 | 1263 | "qc timeout (cmd 0x%x)\n", command); |
a2a7a662 TH |
1264 | } |
1265 | ||
ba6a1308 | 1266 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 TH |
1267 | } |
1268 | ||
d95a717f TH |
1269 | /* do post_internal_cmd */ |
1270 | if (ap->ops->post_internal_cmd) | |
1271 | ap->ops->post_internal_cmd(qc); | |
1272 | ||
a51d644a TH |
1273 | /* perform minimal error analysis */ |
1274 | if (qc->flags & ATA_QCFLAG_FAILED) { | |
1275 | if (qc->result_tf.command & (ATA_ERR | ATA_DF)) | |
1276 | qc->err_mask |= AC_ERR_DEV; | |
1277 | ||
1278 | if (!qc->err_mask) | |
1279 | qc->err_mask |= AC_ERR_OTHER; | |
1280 | ||
1281 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1282 | qc->err_mask &= ~AC_ERR_OTHER; | |
d95a717f TH |
1283 | } |
1284 | ||
15869303 | 1285 | /* finish up */ |
ba6a1308 | 1286 | spin_lock_irqsave(ap->lock, flags); |
15869303 | 1287 | |
e61e0672 | 1288 | *tf = qc->result_tf; |
77853bf2 TH |
1289 | err_mask = qc->err_mask; |
1290 | ||
1291 | ata_qc_free(qc); | |
2ab7db1f | 1292 | ap->active_tag = preempted_tag; |
dedaf2b0 TH |
1293 | ap->sactive = preempted_sactive; |
1294 | ap->qc_active = preempted_qc_active; | |
77853bf2 | 1295 | |
1f7dd3e9 TH |
1296 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
1297 | * Until those drivers are fixed, we detect the condition | |
1298 | * here, fail the command with AC_ERR_SYSTEM and reenable the | |
1299 | * port. | |
1300 | * | |
1301 | * Note that this doesn't change any behavior as internal | |
1302 | * command failure results in disabling the device in the | |
1303 | * higher layer for LLDDs without new reset/EH callbacks. | |
1304 | * | |
1305 | * Kill the following code as soon as those drivers are fixed. | |
1306 | */ | |
198e0fed | 1307 | if (ap->flags & ATA_FLAG_DISABLED) { |
1f7dd3e9 TH |
1308 | err_mask |= AC_ERR_SYSTEM; |
1309 | ata_port_probe(ap); | |
1310 | } | |
1311 | ||
ba6a1308 | 1312 | spin_unlock_irqrestore(ap->lock, flags); |
15869303 | 1313 | |
77853bf2 | 1314 | return err_mask; |
a2a7a662 TH |
1315 | } |
1316 | ||
2432697b | 1317 | /** |
33480a0e | 1318 | * ata_exec_internal - execute libata internal command |
2432697b TH |
1319 | * @dev: Device to which the command is sent |
1320 | * @tf: Taskfile registers for the command and the result | |
1321 | * @cdb: CDB for packet command | |
1322 | * @dma_dir: Data tranfer direction of the command | |
1323 | * @buf: Data buffer of the command | |
1324 | * @buflen: Length of data buffer | |
1325 | * | |
1326 | * Wrapper around ata_exec_internal_sg() which takes simple | |
1327 | * buffer instead of sg list. | |
1328 | * | |
1329 | * LOCKING: | |
1330 | * None. Should be called with kernel context, might sleep. | |
1331 | * | |
1332 | * RETURNS: | |
1333 | * Zero on success, AC_ERR_* mask on failure | |
1334 | */ | |
1335 | unsigned ata_exec_internal(struct ata_device *dev, | |
1336 | struct ata_taskfile *tf, const u8 *cdb, | |
1337 | int dma_dir, void *buf, unsigned int buflen) | |
1338 | { | |
33480a0e TH |
1339 | struct scatterlist *psg = NULL, sg; |
1340 | unsigned int n_elem = 0; | |
2432697b | 1341 | |
33480a0e TH |
1342 | if (dma_dir != DMA_NONE) { |
1343 | WARN_ON(!buf); | |
1344 | sg_init_one(&sg, buf, buflen); | |
1345 | psg = &sg; | |
1346 | n_elem++; | |
1347 | } | |
2432697b | 1348 | |
33480a0e | 1349 | return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem); |
2432697b TH |
1350 | } |
1351 | ||
977e6b9f TH |
1352 | /** |
1353 | * ata_do_simple_cmd - execute simple internal command | |
1354 | * @dev: Device to which the command is sent | |
1355 | * @cmd: Opcode to execute | |
1356 | * | |
1357 | * Execute a 'simple' command, that only consists of the opcode | |
1358 | * 'cmd' itself, without filling any other registers | |
1359 | * | |
1360 | * LOCKING: | |
1361 | * Kernel thread context (may sleep). | |
1362 | * | |
1363 | * RETURNS: | |
1364 | * Zero on success, AC_ERR_* mask on failure | |
e58eb583 | 1365 | */ |
77b08fb5 | 1366 | unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
e58eb583 TH |
1367 | { |
1368 | struct ata_taskfile tf; | |
e58eb583 TH |
1369 | |
1370 | ata_tf_init(dev, &tf); | |
1371 | ||
1372 | tf.command = cmd; | |
1373 | tf.flags |= ATA_TFLAG_DEVICE; | |
1374 | tf.protocol = ATA_PROT_NODATA; | |
1375 | ||
977e6b9f | 1376 | return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
e58eb583 TH |
1377 | } |
1378 | ||
1bc4ccff AC |
1379 | /** |
1380 | * ata_pio_need_iordy - check if iordy needed | |
1381 | * @adev: ATA device | |
1382 | * | |
1383 | * Check if the current speed of the device requires IORDY. Used | |
1384 | * by various controllers for chip configuration. | |
1385 | */ | |
432729f0 | 1386 | |
1bc4ccff AC |
1387 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
1388 | { | |
432729f0 AC |
1389 | /* Controller doesn't support IORDY. Probably a pointless check |
1390 | as the caller should know this */ | |
1391 | if (adev->ap->flags & ATA_FLAG_NO_IORDY) | |
1bc4ccff | 1392 | return 0; |
432729f0 AC |
1393 | /* PIO3 and higher it is mandatory */ |
1394 | if (adev->pio_mode > XFER_PIO_2) | |
1395 | return 1; | |
1396 | /* We turn it on when possible */ | |
1397 | if (ata_id_has_iordy(adev->id)) | |
1bc4ccff | 1398 | return 1; |
432729f0 AC |
1399 | return 0; |
1400 | } | |
2e9edbf8 | 1401 | |
432729f0 AC |
1402 | /** |
1403 | * ata_pio_mask_no_iordy - Return the non IORDY mask | |
1404 | * @adev: ATA device | |
1405 | * | |
1406 | * Compute the highest mode possible if we are not using iordy. Return | |
1407 | * -1 if no iordy mode is available. | |
1408 | */ | |
1409 | ||
1410 | static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) | |
1411 | { | |
1bc4ccff | 1412 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
1bc4ccff | 1413 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
432729f0 | 1414 | u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
1bc4ccff AC |
1415 | /* Is the speed faster than the drive allows non IORDY ? */ |
1416 | if (pio) { | |
1417 | /* This is cycle times not frequency - watch the logic! */ | |
1418 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
432729f0 AC |
1419 | return 3 << ATA_SHIFT_PIO; |
1420 | return 7 << ATA_SHIFT_PIO; | |
1bc4ccff AC |
1421 | } |
1422 | } | |
432729f0 | 1423 | return 3 << ATA_SHIFT_PIO; |
1bc4ccff AC |
1424 | } |
1425 | ||
1da177e4 | 1426 | /** |
49016aca | 1427 | * ata_dev_read_id - Read ID data from the specified device |
49016aca TH |
1428 | * @dev: target device |
1429 | * @p_class: pointer to class of the target device (may be changed) | |
bff04647 | 1430 | * @flags: ATA_READID_* flags |
fe635c7e | 1431 | * @id: buffer to read IDENTIFY data into |
1da177e4 | 1432 | * |
49016aca TH |
1433 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
1434 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
aec5c3c1 TH |
1435 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
1436 | * for pre-ATA4 drives. | |
1da177e4 LT |
1437 | * |
1438 | * LOCKING: | |
49016aca TH |
1439 | * Kernel thread context (may sleep) |
1440 | * | |
1441 | * RETURNS: | |
1442 | * 0 on success, -errno otherwise. | |
1da177e4 | 1443 | */ |
a9beec95 | 1444 | int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, |
bff04647 | 1445 | unsigned int flags, u16 *id) |
1da177e4 | 1446 | { |
3373efd8 | 1447 | struct ata_port *ap = dev->ap; |
49016aca | 1448 | unsigned int class = *p_class; |
a0123703 | 1449 | struct ata_taskfile tf; |
49016aca TH |
1450 | unsigned int err_mask = 0; |
1451 | const char *reason; | |
1452 | int rc; | |
1da177e4 | 1453 | |
0dd4b21f | 1454 | if (ata_msg_ctl(ap)) |
44877b4e | 1455 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); |
1da177e4 | 1456 | |
49016aca | 1457 | ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ |
1da177e4 | 1458 | |
49016aca | 1459 | retry: |
3373efd8 | 1460 | ata_tf_init(dev, &tf); |
a0123703 | 1461 | |
49016aca TH |
1462 | switch (class) { |
1463 | case ATA_DEV_ATA: | |
a0123703 | 1464 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
1465 | break; |
1466 | case ATA_DEV_ATAPI: | |
a0123703 | 1467 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
1468 | break; |
1469 | default: | |
1470 | rc = -ENODEV; | |
1471 | reason = "unsupported class"; | |
1472 | goto err_out; | |
1da177e4 LT |
1473 | } |
1474 | ||
a0123703 | 1475 | tf.protocol = ATA_PROT_PIO; |
81afe893 TH |
1476 | |
1477 | /* Some devices choke if TF registers contain garbage. Make | |
1478 | * sure those are properly initialized. | |
1479 | */ | |
1480 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1481 | ||
1482 | /* Device presence detection is unreliable on some | |
1483 | * controllers. Always poll IDENTIFY if available. | |
1484 | */ | |
1485 | tf.flags |= ATA_TFLAG_POLLING; | |
1da177e4 | 1486 | |
3373efd8 | 1487 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
49016aca | 1488 | id, sizeof(id[0]) * ATA_ID_WORDS); |
a0123703 | 1489 | if (err_mask) { |
800b3996 | 1490 | if (err_mask & AC_ERR_NODEV_HINT) { |
55a8e2c8 | 1491 | DPRINTK("ata%u.%d: NODEV after polling detection\n", |
44877b4e | 1492 | ap->print_id, dev->devno); |
55a8e2c8 TH |
1493 | return -ENOENT; |
1494 | } | |
1495 | ||
49016aca TH |
1496 | rc = -EIO; |
1497 | reason = "I/O error"; | |
1da177e4 LT |
1498 | goto err_out; |
1499 | } | |
1500 | ||
49016aca | 1501 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 | 1502 | |
49016aca | 1503 | /* sanity check */ |
a4f5749b TH |
1504 | rc = -EINVAL; |
1505 | reason = "device reports illegal type"; | |
1506 | ||
1507 | if (class == ATA_DEV_ATA) { | |
1508 | if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) | |
1509 | goto err_out; | |
1510 | } else { | |
1511 | if (ata_id_is_ata(id)) | |
1512 | goto err_out; | |
49016aca TH |
1513 | } |
1514 | ||
bff04647 | 1515 | if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { |
49016aca TH |
1516 | /* |
1517 | * The exact sequence expected by certain pre-ATA4 drives is: | |
1518 | * SRST RESET | |
1519 | * IDENTIFY | |
1520 | * INITIALIZE DEVICE PARAMETERS | |
1521 | * anything else.. | |
1522 | * Some drives were very specific about that exact sequence. | |
1523 | */ | |
1524 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
3373efd8 | 1525 | err_mask = ata_dev_init_params(dev, id[3], id[6]); |
49016aca TH |
1526 | if (err_mask) { |
1527 | rc = -EIO; | |
1528 | reason = "INIT_DEV_PARAMS failed"; | |
1529 | goto err_out; | |
1530 | } | |
1531 | ||
1532 | /* current CHS translation info (id[53-58]) might be | |
1533 | * changed. reread the identify device info. | |
1534 | */ | |
bff04647 | 1535 | flags &= ~ATA_READID_POSTRESET; |
49016aca TH |
1536 | goto retry; |
1537 | } | |
1538 | } | |
1539 | ||
1540 | *p_class = class; | |
fe635c7e | 1541 | |
49016aca TH |
1542 | return 0; |
1543 | ||
1544 | err_out: | |
88574551 | 1545 | if (ata_msg_warn(ap)) |
0dd4b21f | 1546 | ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
88574551 | 1547 | "(%s, err_mask=0x%x)\n", reason, err_mask); |
49016aca TH |
1548 | return rc; |
1549 | } | |
1550 | ||
3373efd8 | 1551 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
4b2f3ede | 1552 | { |
3373efd8 | 1553 | return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); |
4b2f3ede TH |
1554 | } |
1555 | ||
a6e6ce8e TH |
1556 | static void ata_dev_config_ncq(struct ata_device *dev, |
1557 | char *desc, size_t desc_sz) | |
1558 | { | |
1559 | struct ata_port *ap = dev->ap; | |
1560 | int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); | |
1561 | ||
1562 | if (!ata_id_has_ncq(dev->id)) { | |
1563 | desc[0] = '\0'; | |
1564 | return; | |
1565 | } | |
6919a0a6 AC |
1566 | if (ata_device_blacklisted(dev) & ATA_HORKAGE_NONCQ) { |
1567 | snprintf(desc, desc_sz, "NCQ (not used)"); | |
1568 | return; | |
1569 | } | |
a6e6ce8e | 1570 | if (ap->flags & ATA_FLAG_NCQ) { |
cca3974e | 1571 | hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
a6e6ce8e TH |
1572 | dev->flags |= ATA_DFLAG_NCQ; |
1573 | } | |
1574 | ||
1575 | if (hdepth >= ddepth) | |
1576 | snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); | |
1577 | else | |
1578 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); | |
1579 | } | |
1580 | ||
49016aca | 1581 | /** |
ffeae418 | 1582 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
ffeae418 TH |
1583 | * @dev: Target device to configure |
1584 | * | |
1585 | * Configure @dev according to @dev->id. Generic and low-level | |
1586 | * driver specific fixups are also applied. | |
49016aca TH |
1587 | * |
1588 | * LOCKING: | |
ffeae418 TH |
1589 | * Kernel thread context (may sleep) |
1590 | * | |
1591 | * RETURNS: | |
1592 | * 0 on success, -errno otherwise | |
49016aca | 1593 | */ |
efdaedc4 | 1594 | int ata_dev_configure(struct ata_device *dev) |
49016aca | 1595 | { |
3373efd8 | 1596 | struct ata_port *ap = dev->ap; |
efdaedc4 | 1597 | int print_info = ap->eh_context.i.flags & ATA_EHI_PRINTINFO; |
1148c3a7 | 1598 | const u16 *id = dev->id; |
ff8854b2 | 1599 | unsigned int xfer_mask; |
b352e57d | 1600 | char revbuf[7]; /* XYZ-99\0 */ |
3f64f565 EM |
1601 | char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
1602 | char modelbuf[ATA_ID_PROD_LEN+1]; | |
e6d902a3 | 1603 | int rc; |
49016aca | 1604 | |
0dd4b21f | 1605 | if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
44877b4e TH |
1606 | ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", |
1607 | __FUNCTION__); | |
ffeae418 | 1608 | return 0; |
49016aca TH |
1609 | } |
1610 | ||
0dd4b21f | 1611 | if (ata_msg_probe(ap)) |
44877b4e | 1612 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); |
1da177e4 | 1613 | |
08573a86 KCA |
1614 | /* set _SDD */ |
1615 | rc = ata_acpi_push_id(ap, dev->devno); | |
1616 | if (rc) { | |
1617 | ata_dev_printk(dev, KERN_WARNING, "failed to set _SDD(%d)\n", | |
1618 | rc); | |
1619 | } | |
1620 | ||
1621 | /* retrieve and execute the ATA task file of _GTF */ | |
1622 | ata_acpi_exec_tfs(ap); | |
1623 | ||
c39f5ebe | 1624 | /* print device capabilities */ |
0dd4b21f | 1625 | if (ata_msg_probe(ap)) |
88574551 TH |
1626 | ata_dev_printk(dev, KERN_DEBUG, |
1627 | "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " | |
1628 | "85:%04x 86:%04x 87:%04x 88:%04x\n", | |
0dd4b21f | 1629 | __FUNCTION__, |
f15a1daf TH |
1630 | id[49], id[82], id[83], id[84], |
1631 | id[85], id[86], id[87], id[88]); | |
c39f5ebe | 1632 | |
208a9933 | 1633 | /* initialize to-be-configured parameters */ |
ea1dd4e1 | 1634 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
208a9933 TH |
1635 | dev->max_sectors = 0; |
1636 | dev->cdb_len = 0; | |
1637 | dev->n_sectors = 0; | |
1638 | dev->cylinders = 0; | |
1639 | dev->heads = 0; | |
1640 | dev->sectors = 0; | |
1641 | ||
1da177e4 LT |
1642 | /* |
1643 | * common ATA, ATAPI feature tests | |
1644 | */ | |
1645 | ||
ff8854b2 | 1646 | /* find max transfer mode; for printk only */ |
1148c3a7 | 1647 | xfer_mask = ata_id_xfermask(id); |
1da177e4 | 1648 | |
0dd4b21f BP |
1649 | if (ata_msg_probe(ap)) |
1650 | ata_dump_id(id); | |
1da177e4 LT |
1651 | |
1652 | /* ATA-specific feature tests */ | |
1653 | if (dev->class == ATA_DEV_ATA) { | |
b352e57d AC |
1654 | if (ata_id_is_cfa(id)) { |
1655 | if (id[162] & 1) /* CPRM may make this media unusable */ | |
44877b4e TH |
1656 | ata_dev_printk(dev, KERN_WARNING, |
1657 | "supports DRM functions and may " | |
1658 | "not be fully accessable.\n"); | |
b352e57d AC |
1659 | snprintf(revbuf, 7, "CFA"); |
1660 | } | |
1661 | else | |
1662 | snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); | |
1663 | ||
1148c3a7 | 1664 | dev->n_sectors = ata_id_n_sectors(id); |
2940740b | 1665 | |
3f64f565 | 1666 | /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
591a6e8e | 1667 | ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, |
3f64f565 EM |
1668 | sizeof(fwrevbuf)); |
1669 | ||
591a6e8e | 1670 | ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, |
3f64f565 EM |
1671 | sizeof(modelbuf)); |
1672 | ||
1673 | if (dev->id[59] & 0x100) | |
1674 | dev->multi_count = dev->id[59] & 0xff; | |
1675 | ||
1148c3a7 | 1676 | if (ata_id_has_lba(id)) { |
4c2d721a | 1677 | const char *lba_desc; |
a6e6ce8e | 1678 | char ncq_desc[20]; |
8bf62ece | 1679 | |
4c2d721a TH |
1680 | lba_desc = "LBA"; |
1681 | dev->flags |= ATA_DFLAG_LBA; | |
1148c3a7 | 1682 | if (ata_id_has_lba48(id)) { |
8bf62ece | 1683 | dev->flags |= ATA_DFLAG_LBA48; |
4c2d721a | 1684 | lba_desc = "LBA48"; |
6fc49adb TH |
1685 | |
1686 | if (dev->n_sectors >= (1UL << 28) && | |
1687 | ata_id_has_flush_ext(id)) | |
1688 | dev->flags |= ATA_DFLAG_FLUSH_EXT; | |
4c2d721a | 1689 | } |
8bf62ece | 1690 | |
a6e6ce8e TH |
1691 | /* config NCQ */ |
1692 | ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); | |
1693 | ||
8bf62ece | 1694 | /* print device info to dmesg */ |
3f64f565 EM |
1695 | if (ata_msg_drv(ap) && print_info) { |
1696 | ata_dev_printk(dev, KERN_INFO, | |
1697 | "%s: %s, %s, max %s\n", | |
1698 | revbuf, modelbuf, fwrevbuf, | |
1699 | ata_mode_string(xfer_mask)); | |
1700 | ata_dev_printk(dev, KERN_INFO, | |
1701 | "%Lu sectors, multi %u: %s %s\n", | |
f15a1daf | 1702 | (unsigned long long)dev->n_sectors, |
3f64f565 EM |
1703 | dev->multi_count, lba_desc, ncq_desc); |
1704 | } | |
ffeae418 | 1705 | } else { |
8bf62ece AL |
1706 | /* CHS */ |
1707 | ||
1708 | /* Default translation */ | |
1148c3a7 TH |
1709 | dev->cylinders = id[1]; |
1710 | dev->heads = id[3]; | |
1711 | dev->sectors = id[6]; | |
8bf62ece | 1712 | |
1148c3a7 | 1713 | if (ata_id_current_chs_valid(id)) { |
8bf62ece | 1714 | /* Current CHS translation is valid. */ |
1148c3a7 TH |
1715 | dev->cylinders = id[54]; |
1716 | dev->heads = id[55]; | |
1717 | dev->sectors = id[56]; | |
8bf62ece AL |
1718 | } |
1719 | ||
1720 | /* print device info to dmesg */ | |
3f64f565 | 1721 | if (ata_msg_drv(ap) && print_info) { |
88574551 | 1722 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
1723 | "%s: %s, %s, max %s\n", |
1724 | revbuf, modelbuf, fwrevbuf, | |
1725 | ata_mode_string(xfer_mask)); | |
a84471fe | 1726 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
1727 | "%Lu sectors, multi %u, CHS %u/%u/%u\n", |
1728 | (unsigned long long)dev->n_sectors, | |
1729 | dev->multi_count, dev->cylinders, | |
1730 | dev->heads, dev->sectors); | |
1731 | } | |
07f6f7d0 AL |
1732 | } |
1733 | ||
6e7846e9 | 1734 | dev->cdb_len = 16; |
1da177e4 LT |
1735 | } |
1736 | ||
1737 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 1738 | else if (dev->class == ATA_DEV_ATAPI) { |
08a556db AL |
1739 | char *cdb_intr_string = ""; |
1740 | ||
1148c3a7 | 1741 | rc = atapi_cdb_len(id); |
1da177e4 | 1742 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
0dd4b21f | 1743 | if (ata_msg_warn(ap)) |
88574551 TH |
1744 | ata_dev_printk(dev, KERN_WARNING, |
1745 | "unsupported CDB len\n"); | |
ffeae418 | 1746 | rc = -EINVAL; |
1da177e4 LT |
1747 | goto err_out_nosup; |
1748 | } | |
6e7846e9 | 1749 | dev->cdb_len = (unsigned int) rc; |
1da177e4 | 1750 | |
08a556db | 1751 | if (ata_id_cdb_intr(dev->id)) { |
312f7da2 | 1752 | dev->flags |= ATA_DFLAG_CDB_INTR; |
08a556db AL |
1753 | cdb_intr_string = ", CDB intr"; |
1754 | } | |
312f7da2 | 1755 | |
1da177e4 | 1756 | /* print device info to dmesg */ |
5afc8142 | 1757 | if (ata_msg_drv(ap) && print_info) |
12436c30 TH |
1758 | ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n", |
1759 | ata_mode_string(xfer_mask), | |
1760 | cdb_intr_string); | |
1da177e4 LT |
1761 | } |
1762 | ||
914ed354 TH |
1763 | /* determine max_sectors */ |
1764 | dev->max_sectors = ATA_MAX_SECTORS; | |
1765 | if (dev->flags & ATA_DFLAG_LBA48) | |
1766 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; | |
1767 | ||
93590859 AC |
1768 | if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
1769 | /* Let the user know. We don't want to disallow opens for | |
1770 | rescue purposes, or in case the vendor is just a blithering | |
1771 | idiot */ | |
1772 | if (print_info) { | |
1773 | ata_dev_printk(dev, KERN_WARNING, | |
1774 | "Drive reports diagnostics failure. This may indicate a drive\n"); | |
1775 | ata_dev_printk(dev, KERN_WARNING, | |
1776 | "fault or invalid emulation. Contact drive vendor for information.\n"); | |
1777 | } | |
1778 | } | |
1779 | ||
4b2f3ede | 1780 | /* limit bridge transfers to udma5, 200 sectors */ |
3373efd8 | 1781 | if (ata_dev_knobble(dev)) { |
5afc8142 | 1782 | if (ata_msg_drv(ap) && print_info) |
f15a1daf TH |
1783 | ata_dev_printk(dev, KERN_INFO, |
1784 | "applying bridge limits\n"); | |
5a529139 | 1785 | dev->udma_mask &= ATA_UDMA5; |
4b2f3ede TH |
1786 | dev->max_sectors = ATA_MAX_SECTORS; |
1787 | } | |
1788 | ||
18d6e9d5 | 1789 | if (ata_device_blacklisted(dev) & ATA_HORKAGE_MAX_SEC_128) |
03ec52de TH |
1790 | dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, |
1791 | dev->max_sectors); | |
18d6e9d5 | 1792 | |
6f23a31d AL |
1793 | /* limit ATAPI DMA to R/W commands only */ |
1794 | if (ata_device_blacklisted(dev) & ATA_HORKAGE_DMA_RW_ONLY) | |
1795 | dev->horkage |= ATA_HORKAGE_DMA_RW_ONLY; | |
1796 | ||
4b2f3ede | 1797 | if (ap->ops->dev_config) |
cd0d3bbc | 1798 | ap->ops->dev_config(dev); |
4b2f3ede | 1799 | |
0dd4b21f BP |
1800 | if (ata_msg_probe(ap)) |
1801 | ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", | |
1802 | __FUNCTION__, ata_chk_status(ap)); | |
ffeae418 | 1803 | return 0; |
1da177e4 LT |
1804 | |
1805 | err_out_nosup: | |
0dd4b21f | 1806 | if (ata_msg_probe(ap)) |
88574551 TH |
1807 | ata_dev_printk(dev, KERN_DEBUG, |
1808 | "%s: EXIT, err\n", __FUNCTION__); | |
ffeae418 | 1809 | return rc; |
1da177e4 LT |
1810 | } |
1811 | ||
be0d18df | 1812 | /** |
2e41e8e6 | 1813 | * ata_cable_40wire - return 40 wire cable type |
be0d18df AC |
1814 | * @ap: port |
1815 | * | |
2e41e8e6 | 1816 | * Helper method for drivers which want to hardwire 40 wire cable |
be0d18df AC |
1817 | * detection. |
1818 | */ | |
1819 | ||
1820 | int ata_cable_40wire(struct ata_port *ap) | |
1821 | { | |
1822 | return ATA_CBL_PATA40; | |
1823 | } | |
1824 | ||
1825 | /** | |
2e41e8e6 | 1826 | * ata_cable_80wire - return 80 wire cable type |
be0d18df AC |
1827 | * @ap: port |
1828 | * | |
2e41e8e6 | 1829 | * Helper method for drivers which want to hardwire 80 wire cable |
be0d18df AC |
1830 | * detection. |
1831 | */ | |
1832 | ||
1833 | int ata_cable_80wire(struct ata_port *ap) | |
1834 | { | |
1835 | return ATA_CBL_PATA80; | |
1836 | } | |
1837 | ||
1838 | /** | |
1839 | * ata_cable_unknown - return unknown PATA cable. | |
1840 | * @ap: port | |
1841 | * | |
1842 | * Helper method for drivers which have no PATA cable detection. | |
1843 | */ | |
1844 | ||
1845 | int ata_cable_unknown(struct ata_port *ap) | |
1846 | { | |
1847 | return ATA_CBL_PATA_UNK; | |
1848 | } | |
1849 | ||
1850 | /** | |
1851 | * ata_cable_sata - return SATA cable type | |
1852 | * @ap: port | |
1853 | * | |
1854 | * Helper method for drivers which have SATA cables | |
1855 | */ | |
1856 | ||
1857 | int ata_cable_sata(struct ata_port *ap) | |
1858 | { | |
1859 | return ATA_CBL_SATA; | |
1860 | } | |
1861 | ||
1da177e4 LT |
1862 | /** |
1863 | * ata_bus_probe - Reset and probe ATA bus | |
1864 | * @ap: Bus to probe | |
1865 | * | |
0cba632b JG |
1866 | * Master ATA bus probing function. Initiates a hardware-dependent |
1867 | * bus reset, then attempts to identify any devices found on | |
1868 | * the bus. | |
1869 | * | |
1da177e4 | 1870 | * LOCKING: |
0cba632b | 1871 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1872 | * |
1873 | * RETURNS: | |
96072e69 | 1874 | * Zero on success, negative errno otherwise. |
1da177e4 LT |
1875 | */ |
1876 | ||
80289167 | 1877 | int ata_bus_probe(struct ata_port *ap) |
1da177e4 | 1878 | { |
28ca5c57 | 1879 | unsigned int classes[ATA_MAX_DEVICES]; |
14d2bac1 | 1880 | int tries[ATA_MAX_DEVICES]; |
4ae72a1e | 1881 | int i, rc; |
e82cbdb9 | 1882 | struct ata_device *dev; |
1da177e4 | 1883 | |
28ca5c57 | 1884 | ata_port_probe(ap); |
c19ba8af | 1885 | |
14d2bac1 TH |
1886 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
1887 | tries[i] = ATA_PROBE_MAX_TRIES; | |
1888 | ||
1889 | retry: | |
2044470c | 1890 | /* reset and determine device classes */ |
52783c5d | 1891 | ap->ops->phy_reset(ap); |
2061a47a | 1892 | |
52783c5d TH |
1893 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
1894 | dev = &ap->device[i]; | |
c19ba8af | 1895 | |
52783c5d TH |
1896 | if (!(ap->flags & ATA_FLAG_DISABLED) && |
1897 | dev->class != ATA_DEV_UNKNOWN) | |
1898 | classes[dev->devno] = dev->class; | |
1899 | else | |
1900 | classes[dev->devno] = ATA_DEV_NONE; | |
2044470c | 1901 | |
52783c5d | 1902 | dev->class = ATA_DEV_UNKNOWN; |
28ca5c57 | 1903 | } |
1da177e4 | 1904 | |
52783c5d | 1905 | ata_port_probe(ap); |
2044470c | 1906 | |
b6079ca4 AC |
1907 | /* after the reset the device state is PIO 0 and the controller |
1908 | state is undefined. Record the mode */ | |
1909 | ||
1910 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
1911 | ap->device[i].pio_mode = XFER_PIO_0; | |
1912 | ||
f31f0cc2 JG |
1913 | /* read IDENTIFY page and configure devices. We have to do the identify |
1914 | specific sequence bass-ackwards so that PDIAG- is released by | |
1915 | the slave device */ | |
1916 | ||
1917 | for (i = ATA_MAX_DEVICES - 1; i >= 0; i--) { | |
e82cbdb9 | 1918 | dev = &ap->device[i]; |
28ca5c57 | 1919 | |
ec573755 TH |
1920 | if (tries[i]) |
1921 | dev->class = classes[i]; | |
ffeae418 | 1922 | |
14d2bac1 | 1923 | if (!ata_dev_enabled(dev)) |
ffeae418 | 1924 | continue; |
ffeae418 | 1925 | |
bff04647 TH |
1926 | rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
1927 | dev->id); | |
14d2bac1 TH |
1928 | if (rc) |
1929 | goto fail; | |
f31f0cc2 JG |
1930 | } |
1931 | ||
be0d18df AC |
1932 | /* Now ask for the cable type as PDIAG- should have been released */ |
1933 | if (ap->ops->cable_detect) | |
1934 | ap->cbl = ap->ops->cable_detect(ap); | |
1935 | ||
f31f0cc2 JG |
1936 | /* After the identify sequence we can now set up the devices. We do |
1937 | this in the normal order so that the user doesn't get confused */ | |
1938 | ||
1939 | for(i = 0; i < ATA_MAX_DEVICES; i++) { | |
1940 | dev = &ap->device[i]; | |
1941 | if (!ata_dev_enabled(dev)) | |
1942 | continue; | |
14d2bac1 | 1943 | |
efdaedc4 TH |
1944 | ap->eh_context.i.flags |= ATA_EHI_PRINTINFO; |
1945 | rc = ata_dev_configure(dev); | |
1946 | ap->eh_context.i.flags &= ~ATA_EHI_PRINTINFO; | |
14d2bac1 TH |
1947 | if (rc) |
1948 | goto fail; | |
1da177e4 LT |
1949 | } |
1950 | ||
e82cbdb9 | 1951 | /* configure transfer mode */ |
3adcebb2 | 1952 | rc = ata_set_mode(ap, &dev); |
4ae72a1e | 1953 | if (rc) |
51713d35 | 1954 | goto fail; |
1da177e4 | 1955 | |
e82cbdb9 TH |
1956 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
1957 | if (ata_dev_enabled(&ap->device[i])) | |
1958 | return 0; | |
1da177e4 | 1959 | |
e82cbdb9 TH |
1960 | /* no device present, disable port */ |
1961 | ata_port_disable(ap); | |
1da177e4 | 1962 | ap->ops->port_disable(ap); |
96072e69 | 1963 | return -ENODEV; |
14d2bac1 TH |
1964 | |
1965 | fail: | |
4ae72a1e TH |
1966 | tries[dev->devno]--; |
1967 | ||
14d2bac1 TH |
1968 | switch (rc) { |
1969 | case -EINVAL: | |
4ae72a1e | 1970 | /* eeek, something went very wrong, give up */ |
14d2bac1 TH |
1971 | tries[dev->devno] = 0; |
1972 | break; | |
4ae72a1e TH |
1973 | |
1974 | case -ENODEV: | |
1975 | /* give it just one more chance */ | |
1976 | tries[dev->devno] = min(tries[dev->devno], 1); | |
14d2bac1 | 1977 | case -EIO: |
4ae72a1e TH |
1978 | if (tries[dev->devno] == 1) { |
1979 | /* This is the last chance, better to slow | |
1980 | * down than lose it. | |
1981 | */ | |
1982 | sata_down_spd_limit(ap); | |
1983 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); | |
1984 | } | |
14d2bac1 TH |
1985 | } |
1986 | ||
4ae72a1e | 1987 | if (!tries[dev->devno]) |
3373efd8 | 1988 | ata_dev_disable(dev); |
ec573755 | 1989 | |
14d2bac1 | 1990 | goto retry; |
1da177e4 LT |
1991 | } |
1992 | ||
1993 | /** | |
0cba632b JG |
1994 | * ata_port_probe - Mark port as enabled |
1995 | * @ap: Port for which we indicate enablement | |
1da177e4 | 1996 | * |
0cba632b JG |
1997 | * Modify @ap data structure such that the system |
1998 | * thinks that the entire port is enabled. | |
1999 | * | |
cca3974e | 2000 | * LOCKING: host lock, or some other form of |
0cba632b | 2001 | * serialization. |
1da177e4 LT |
2002 | */ |
2003 | ||
2004 | void ata_port_probe(struct ata_port *ap) | |
2005 | { | |
198e0fed | 2006 | ap->flags &= ~ATA_FLAG_DISABLED; |
1da177e4 LT |
2007 | } |
2008 | ||
3be680b7 TH |
2009 | /** |
2010 | * sata_print_link_status - Print SATA link status | |
2011 | * @ap: SATA port to printk link status about | |
2012 | * | |
2013 | * This function prints link speed and status of a SATA link. | |
2014 | * | |
2015 | * LOCKING: | |
2016 | * None. | |
2017 | */ | |
43727fbc | 2018 | void sata_print_link_status(struct ata_port *ap) |
3be680b7 | 2019 | { |
6d5f9732 | 2020 | u32 sstatus, scontrol, tmp; |
3be680b7 | 2021 | |
81952c54 | 2022 | if (sata_scr_read(ap, SCR_STATUS, &sstatus)) |
3be680b7 | 2023 | return; |
81952c54 | 2024 | sata_scr_read(ap, SCR_CONTROL, &scontrol); |
3be680b7 | 2025 | |
81952c54 | 2026 | if (ata_port_online(ap)) { |
3be680b7 | 2027 | tmp = (sstatus >> 4) & 0xf; |
f15a1daf TH |
2028 | ata_port_printk(ap, KERN_INFO, |
2029 | "SATA link up %s (SStatus %X SControl %X)\n", | |
2030 | sata_spd_string(tmp), sstatus, scontrol); | |
3be680b7 | 2031 | } else { |
f15a1daf TH |
2032 | ata_port_printk(ap, KERN_INFO, |
2033 | "SATA link down (SStatus %X SControl %X)\n", | |
2034 | sstatus, scontrol); | |
3be680b7 TH |
2035 | } |
2036 | } | |
2037 | ||
1da177e4 | 2038 | /** |
780a87f7 JG |
2039 | * __sata_phy_reset - Wake/reset a low-level SATA PHY |
2040 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 2041 | * |
780a87f7 JG |
2042 | * This function issues commands to standard SATA Sxxx |
2043 | * PHY registers, to wake up the phy (and device), and | |
2044 | * clear any reset condition. | |
1da177e4 LT |
2045 | * |
2046 | * LOCKING: | |
0cba632b | 2047 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2048 | * |
2049 | */ | |
2050 | void __sata_phy_reset(struct ata_port *ap) | |
2051 | { | |
2052 | u32 sstatus; | |
2053 | unsigned long timeout = jiffies + (HZ * 5); | |
2054 | ||
2055 | if (ap->flags & ATA_FLAG_SATA_RESET) { | |
cdcca89e | 2056 | /* issue phy wake/reset */ |
81952c54 | 2057 | sata_scr_write_flush(ap, SCR_CONTROL, 0x301); |
62ba2841 TH |
2058 | /* Couldn't find anything in SATA I/II specs, but |
2059 | * AHCI-1.1 10.4.2 says at least 1 ms. */ | |
2060 | mdelay(1); | |
1da177e4 | 2061 | } |
81952c54 TH |
2062 | /* phy wake/clear reset */ |
2063 | sata_scr_write_flush(ap, SCR_CONTROL, 0x300); | |
1da177e4 LT |
2064 | |
2065 | /* wait for phy to become ready, if necessary */ | |
2066 | do { | |
2067 | msleep(200); | |
81952c54 | 2068 | sata_scr_read(ap, SCR_STATUS, &sstatus); |
1da177e4 LT |
2069 | if ((sstatus & 0xf) != 1) |
2070 | break; | |
2071 | } while (time_before(jiffies, timeout)); | |
2072 | ||
3be680b7 TH |
2073 | /* print link status */ |
2074 | sata_print_link_status(ap); | |
656563e3 | 2075 | |
3be680b7 | 2076 | /* TODO: phy layer with polling, timeouts, etc. */ |
81952c54 | 2077 | if (!ata_port_offline(ap)) |
1da177e4 | 2078 | ata_port_probe(ap); |
3be680b7 | 2079 | else |
1da177e4 | 2080 | ata_port_disable(ap); |
1da177e4 | 2081 | |
198e0fed | 2082 | if (ap->flags & ATA_FLAG_DISABLED) |
1da177e4 LT |
2083 | return; |
2084 | ||
2085 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { | |
2086 | ata_port_disable(ap); | |
2087 | return; | |
2088 | } | |
2089 | ||
2090 | ap->cbl = ATA_CBL_SATA; | |
2091 | } | |
2092 | ||
2093 | /** | |
780a87f7 JG |
2094 | * sata_phy_reset - Reset SATA bus. |
2095 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 2096 | * |
780a87f7 JG |
2097 | * This function resets the SATA bus, and then probes |
2098 | * the bus for devices. | |
1da177e4 LT |
2099 | * |
2100 | * LOCKING: | |
0cba632b | 2101 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2102 | * |
2103 | */ | |
2104 | void sata_phy_reset(struct ata_port *ap) | |
2105 | { | |
2106 | __sata_phy_reset(ap); | |
198e0fed | 2107 | if (ap->flags & ATA_FLAG_DISABLED) |
1da177e4 LT |
2108 | return; |
2109 | ata_bus_reset(ap); | |
2110 | } | |
2111 | ||
ebdfca6e AC |
2112 | /** |
2113 | * ata_dev_pair - return other device on cable | |
ebdfca6e AC |
2114 | * @adev: device |
2115 | * | |
2116 | * Obtain the other device on the same cable, or if none is | |
2117 | * present NULL is returned | |
2118 | */ | |
2e9edbf8 | 2119 | |
3373efd8 | 2120 | struct ata_device *ata_dev_pair(struct ata_device *adev) |
ebdfca6e | 2121 | { |
3373efd8 | 2122 | struct ata_port *ap = adev->ap; |
ebdfca6e | 2123 | struct ata_device *pair = &ap->device[1 - adev->devno]; |
e1211e3f | 2124 | if (!ata_dev_enabled(pair)) |
ebdfca6e AC |
2125 | return NULL; |
2126 | return pair; | |
2127 | } | |
2128 | ||
1da177e4 | 2129 | /** |
780a87f7 JG |
2130 | * ata_port_disable - Disable port. |
2131 | * @ap: Port to be disabled. | |
1da177e4 | 2132 | * |
780a87f7 JG |
2133 | * Modify @ap data structure such that the system |
2134 | * thinks that the entire port is disabled, and should | |
2135 | * never attempt to probe or communicate with devices | |
2136 | * on this port. | |
2137 | * | |
cca3974e | 2138 | * LOCKING: host lock, or some other form of |
780a87f7 | 2139 | * serialization. |
1da177e4 LT |
2140 | */ |
2141 | ||
2142 | void ata_port_disable(struct ata_port *ap) | |
2143 | { | |
2144 | ap->device[0].class = ATA_DEV_NONE; | |
2145 | ap->device[1].class = ATA_DEV_NONE; | |
198e0fed | 2146 | ap->flags |= ATA_FLAG_DISABLED; |
1da177e4 LT |
2147 | } |
2148 | ||
1c3fae4d | 2149 | /** |
3c567b7d | 2150 | * sata_down_spd_limit - adjust SATA spd limit downward |
1c3fae4d TH |
2151 | * @ap: Port to adjust SATA spd limit for |
2152 | * | |
2153 | * Adjust SATA spd limit of @ap downward. Note that this | |
2154 | * function only adjusts the limit. The change must be applied | |
3c567b7d | 2155 | * using sata_set_spd(). |
1c3fae4d TH |
2156 | * |
2157 | * LOCKING: | |
2158 | * Inherited from caller. | |
2159 | * | |
2160 | * RETURNS: | |
2161 | * 0 on success, negative errno on failure | |
2162 | */ | |
3c567b7d | 2163 | int sata_down_spd_limit(struct ata_port *ap) |
1c3fae4d | 2164 | { |
81952c54 TH |
2165 | u32 sstatus, spd, mask; |
2166 | int rc, highbit; | |
1c3fae4d | 2167 | |
81952c54 TH |
2168 | rc = sata_scr_read(ap, SCR_STATUS, &sstatus); |
2169 | if (rc) | |
2170 | return rc; | |
1c3fae4d TH |
2171 | |
2172 | mask = ap->sata_spd_limit; | |
2173 | if (mask <= 1) | |
2174 | return -EINVAL; | |
2175 | highbit = fls(mask) - 1; | |
2176 | mask &= ~(1 << highbit); | |
2177 | ||
81952c54 | 2178 | spd = (sstatus >> 4) & 0xf; |
1c3fae4d TH |
2179 | if (spd <= 1) |
2180 | return -EINVAL; | |
2181 | spd--; | |
2182 | mask &= (1 << spd) - 1; | |
2183 | if (!mask) | |
2184 | return -EINVAL; | |
2185 | ||
2186 | ap->sata_spd_limit = mask; | |
2187 | ||
f15a1daf TH |
2188 | ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n", |
2189 | sata_spd_string(fls(mask))); | |
1c3fae4d TH |
2190 | |
2191 | return 0; | |
2192 | } | |
2193 | ||
3c567b7d | 2194 | static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol) |
1c3fae4d TH |
2195 | { |
2196 | u32 spd, limit; | |
2197 | ||
2198 | if (ap->sata_spd_limit == UINT_MAX) | |
2199 | limit = 0; | |
2200 | else | |
2201 | limit = fls(ap->sata_spd_limit); | |
2202 | ||
2203 | spd = (*scontrol >> 4) & 0xf; | |
2204 | *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); | |
2205 | ||
2206 | return spd != limit; | |
2207 | } | |
2208 | ||
2209 | /** | |
3c567b7d | 2210 | * sata_set_spd_needed - is SATA spd configuration needed |
1c3fae4d TH |
2211 | * @ap: Port in question |
2212 | * | |
2213 | * Test whether the spd limit in SControl matches | |
2214 | * @ap->sata_spd_limit. This function is used to determine | |
2215 | * whether hardreset is necessary to apply SATA spd | |
2216 | * configuration. | |
2217 | * | |
2218 | * LOCKING: | |
2219 | * Inherited from caller. | |
2220 | * | |
2221 | * RETURNS: | |
2222 | * 1 if SATA spd configuration is needed, 0 otherwise. | |
2223 | */ | |
3c567b7d | 2224 | int sata_set_spd_needed(struct ata_port *ap) |
1c3fae4d TH |
2225 | { |
2226 | u32 scontrol; | |
2227 | ||
81952c54 | 2228 | if (sata_scr_read(ap, SCR_CONTROL, &scontrol)) |
1c3fae4d TH |
2229 | return 0; |
2230 | ||
3c567b7d | 2231 | return __sata_set_spd_needed(ap, &scontrol); |
1c3fae4d TH |
2232 | } |
2233 | ||
2234 | /** | |
3c567b7d | 2235 | * sata_set_spd - set SATA spd according to spd limit |
1c3fae4d TH |
2236 | * @ap: Port to set SATA spd for |
2237 | * | |
2238 | * Set SATA spd of @ap according to sata_spd_limit. | |
2239 | * | |
2240 | * LOCKING: | |
2241 | * Inherited from caller. | |
2242 | * | |
2243 | * RETURNS: | |
2244 | * 0 if spd doesn't need to be changed, 1 if spd has been | |
81952c54 | 2245 | * changed. Negative errno if SCR registers are inaccessible. |
1c3fae4d | 2246 | */ |
3c567b7d | 2247 | int sata_set_spd(struct ata_port *ap) |
1c3fae4d TH |
2248 | { |
2249 | u32 scontrol; | |
81952c54 | 2250 | int rc; |
1c3fae4d | 2251 | |
81952c54 TH |
2252 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
2253 | return rc; | |
1c3fae4d | 2254 | |
3c567b7d | 2255 | if (!__sata_set_spd_needed(ap, &scontrol)) |
1c3fae4d TH |
2256 | return 0; |
2257 | ||
81952c54 TH |
2258 | if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) |
2259 | return rc; | |
2260 | ||
1c3fae4d TH |
2261 | return 1; |
2262 | } | |
2263 | ||
452503f9 AC |
2264 | /* |
2265 | * This mode timing computation functionality is ported over from | |
2266 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
2267 | */ | |
2268 | /* | |
b352e57d | 2269 | * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). |
452503f9 | 2270 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
b352e57d AC |
2271 | * for UDMA6, which is currently supported only by Maxtor drives. |
2272 | * | |
2273 | * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. | |
452503f9 AC |
2274 | */ |
2275 | ||
2276 | static const struct ata_timing ata_timing[] = { | |
2277 | ||
2278 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
2279 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
2280 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
2281 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
2282 | ||
b352e57d AC |
2283 | { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, |
2284 | { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, | |
452503f9 AC |
2285 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, |
2286 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
2287 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, | |
2288 | ||
2289 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
2e9edbf8 | 2290 | |
452503f9 AC |
2291 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, |
2292 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, | |
2293 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, | |
2e9edbf8 | 2294 | |
452503f9 AC |
2295 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, |
2296 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, | |
2297 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, | |
2298 | ||
b352e57d AC |
2299 | { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, |
2300 | { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, | |
452503f9 AC |
2301 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, |
2302 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, | |
2303 | ||
2304 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, | |
2305 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, | |
2306 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, | |
2307 | ||
2308 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ | |
2309 | ||
2310 | { 0xFF } | |
2311 | }; | |
2312 | ||
2313 | #define ENOUGH(v,unit) (((v)-1)/(unit)+1) | |
2314 | #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) | |
2315 | ||
2316 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
2317 | { | |
2318 | q->setup = EZ(t->setup * 1000, T); | |
2319 | q->act8b = EZ(t->act8b * 1000, T); | |
2320 | q->rec8b = EZ(t->rec8b * 1000, T); | |
2321 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
2322 | q->active = EZ(t->active * 1000, T); | |
2323 | q->recover = EZ(t->recover * 1000, T); | |
2324 | q->cycle = EZ(t->cycle * 1000, T); | |
2325 | q->udma = EZ(t->udma * 1000, UT); | |
2326 | } | |
2327 | ||
2328 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
2329 | struct ata_timing *m, unsigned int what) | |
2330 | { | |
2331 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
2332 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
2333 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
2334 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
2335 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
2336 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
2337 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); | |
2338 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
2339 | } | |
2340 | ||
2341 | static const struct ata_timing* ata_timing_find_mode(unsigned short speed) | |
2342 | { | |
2343 | const struct ata_timing *t; | |
2344 | ||
2345 | for (t = ata_timing; t->mode != speed; t++) | |
91190758 | 2346 | if (t->mode == 0xFF) |
452503f9 | 2347 | return NULL; |
2e9edbf8 | 2348 | return t; |
452503f9 AC |
2349 | } |
2350 | ||
2351 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
2352 | struct ata_timing *t, int T, int UT) | |
2353 | { | |
2354 | const struct ata_timing *s; | |
2355 | struct ata_timing p; | |
2356 | ||
2357 | /* | |
2e9edbf8 | 2358 | * Find the mode. |
75b1f2f8 | 2359 | */ |
452503f9 AC |
2360 | |
2361 | if (!(s = ata_timing_find_mode(speed))) | |
2362 | return -EINVAL; | |
2363 | ||
75b1f2f8 AL |
2364 | memcpy(t, s, sizeof(*s)); |
2365 | ||
452503f9 AC |
2366 | /* |
2367 | * If the drive is an EIDE drive, it can tell us it needs extended | |
2368 | * PIO/MW_DMA cycle timing. | |
2369 | */ | |
2370 | ||
2371 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ | |
2372 | memset(&p, 0, sizeof(p)); | |
2373 | if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { | |
2374 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; | |
2375 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; | |
2376 | } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { | |
2377 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; | |
2378 | } | |
2379 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); | |
2380 | } | |
2381 | ||
2382 | /* | |
2383 | * Convert the timing to bus clock counts. | |
2384 | */ | |
2385 | ||
75b1f2f8 | 2386 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
2387 | |
2388 | /* | |
c893a3ae RD |
2389 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
2390 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
2391 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
2392 | */ |
2393 | ||
fd3367af | 2394 | if (speed > XFER_PIO_6) { |
452503f9 AC |
2395 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
2396 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
2397 | } | |
2398 | ||
2399 | /* | |
c893a3ae | 2400 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
2401 | */ |
2402 | ||
2403 | if (t->act8b + t->rec8b < t->cyc8b) { | |
2404 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
2405 | t->rec8b = t->cyc8b - t->act8b; | |
2406 | } | |
2407 | ||
2408 | if (t->active + t->recover < t->cycle) { | |
2409 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
2410 | t->recover = t->cycle - t->active; | |
2411 | } | |
2412 | ||
2413 | return 0; | |
2414 | } | |
2415 | ||
cf176e1a TH |
2416 | /** |
2417 | * ata_down_xfermask_limit - adjust dev xfer masks downward | |
cf176e1a | 2418 | * @dev: Device to adjust xfer masks |
458337db | 2419 | * @sel: ATA_DNXFER_* selector |
cf176e1a TH |
2420 | * |
2421 | * Adjust xfer masks of @dev downward. Note that this function | |
2422 | * does not apply the change. Invoking ata_set_mode() afterwards | |
2423 | * will apply the limit. | |
2424 | * | |
2425 | * LOCKING: | |
2426 | * Inherited from caller. | |
2427 | * | |
2428 | * RETURNS: | |
2429 | * 0 on success, negative errno on failure | |
2430 | */ | |
458337db | 2431 | int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
cf176e1a | 2432 | { |
458337db TH |
2433 | char buf[32]; |
2434 | unsigned int orig_mask, xfer_mask; | |
2435 | unsigned int pio_mask, mwdma_mask, udma_mask; | |
2436 | int quiet, highbit; | |
cf176e1a | 2437 | |
458337db TH |
2438 | quiet = !!(sel & ATA_DNXFER_QUIET); |
2439 | sel &= ~ATA_DNXFER_QUIET; | |
cf176e1a | 2440 | |
458337db TH |
2441 | xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
2442 | dev->mwdma_mask, | |
2443 | dev->udma_mask); | |
2444 | ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); | |
cf176e1a | 2445 | |
458337db TH |
2446 | switch (sel) { |
2447 | case ATA_DNXFER_PIO: | |
2448 | highbit = fls(pio_mask) - 1; | |
2449 | pio_mask &= ~(1 << highbit); | |
2450 | break; | |
2451 | ||
2452 | case ATA_DNXFER_DMA: | |
2453 | if (udma_mask) { | |
2454 | highbit = fls(udma_mask) - 1; | |
2455 | udma_mask &= ~(1 << highbit); | |
2456 | if (!udma_mask) | |
2457 | return -ENOENT; | |
2458 | } else if (mwdma_mask) { | |
2459 | highbit = fls(mwdma_mask) - 1; | |
2460 | mwdma_mask &= ~(1 << highbit); | |
2461 | if (!mwdma_mask) | |
2462 | return -ENOENT; | |
2463 | } | |
2464 | break; | |
2465 | ||
2466 | case ATA_DNXFER_40C: | |
2467 | udma_mask &= ATA_UDMA_MASK_40C; | |
2468 | break; | |
2469 | ||
2470 | case ATA_DNXFER_FORCE_PIO0: | |
2471 | pio_mask &= 1; | |
2472 | case ATA_DNXFER_FORCE_PIO: | |
2473 | mwdma_mask = 0; | |
2474 | udma_mask = 0; | |
2475 | break; | |
2476 | ||
458337db TH |
2477 | default: |
2478 | BUG(); | |
2479 | } | |
2480 | ||
2481 | xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
2482 | ||
2483 | if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) | |
2484 | return -ENOENT; | |
2485 | ||
2486 | if (!quiet) { | |
2487 | if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) | |
2488 | snprintf(buf, sizeof(buf), "%s:%s", | |
2489 | ata_mode_string(xfer_mask), | |
2490 | ata_mode_string(xfer_mask & ATA_MASK_PIO)); | |
2491 | else | |
2492 | snprintf(buf, sizeof(buf), "%s", | |
2493 | ata_mode_string(xfer_mask)); | |
2494 | ||
2495 | ata_dev_printk(dev, KERN_WARNING, | |
2496 | "limiting speed to %s\n", buf); | |
2497 | } | |
cf176e1a TH |
2498 | |
2499 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, | |
2500 | &dev->udma_mask); | |
2501 | ||
cf176e1a | 2502 | return 0; |
cf176e1a TH |
2503 | } |
2504 | ||
3373efd8 | 2505 | static int ata_dev_set_mode(struct ata_device *dev) |
1da177e4 | 2506 | { |
baa1e78a | 2507 | struct ata_eh_context *ehc = &dev->ap->eh_context; |
83206a29 TH |
2508 | unsigned int err_mask; |
2509 | int rc; | |
1da177e4 | 2510 | |
e8384607 | 2511 | dev->flags &= ~ATA_DFLAG_PIO; |
1da177e4 LT |
2512 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
2513 | dev->flags |= ATA_DFLAG_PIO; | |
2514 | ||
3373efd8 | 2515 | err_mask = ata_dev_set_xfermode(dev); |
11750a40 A |
2516 | /* Old CFA may refuse this command, which is just fine */ |
2517 | if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) | |
2518 | err_mask &= ~AC_ERR_DEV; | |
2519 | ||
83206a29 | 2520 | if (err_mask) { |
f15a1daf TH |
2521 | ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " |
2522 | "(err_mask=0x%x)\n", err_mask); | |
83206a29 TH |
2523 | return -EIO; |
2524 | } | |
1da177e4 | 2525 | |
baa1e78a | 2526 | ehc->i.flags |= ATA_EHI_POST_SETMODE; |
3373efd8 | 2527 | rc = ata_dev_revalidate(dev, 0); |
baa1e78a | 2528 | ehc->i.flags &= ~ATA_EHI_POST_SETMODE; |
5eb45c02 | 2529 | if (rc) |
83206a29 | 2530 | return rc; |
48a8a14f | 2531 | |
23e71c3d TH |
2532 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
2533 | dev->xfer_shift, (int)dev->xfer_mode); | |
1da177e4 | 2534 | |
f15a1daf TH |
2535 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", |
2536 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); | |
83206a29 | 2537 | return 0; |
1da177e4 LT |
2538 | } |
2539 | ||
1da177e4 | 2540 | /** |
04351821 | 2541 | * ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
1da177e4 | 2542 | * @ap: port on which timings will be programmed |
e82cbdb9 | 2543 | * @r_failed_dev: out paramter for failed device |
1da177e4 | 2544 | * |
04351821 A |
2545 | * Standard implementation of the function used to tune and set |
2546 | * ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
2547 | * ata_dev_set_mode() fails, pointer to the failing device is | |
e82cbdb9 | 2548 | * returned in @r_failed_dev. |
780a87f7 | 2549 | * |
1da177e4 | 2550 | * LOCKING: |
0cba632b | 2551 | * PCI/etc. bus probe sem. |
e82cbdb9 TH |
2552 | * |
2553 | * RETURNS: | |
2554 | * 0 on success, negative errno otherwise | |
1da177e4 | 2555 | */ |
04351821 A |
2556 | |
2557 | int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) | |
1da177e4 | 2558 | { |
e8e0619f | 2559 | struct ata_device *dev; |
e82cbdb9 | 2560 | int i, rc = 0, used_dma = 0, found = 0; |
1da177e4 | 2561 | |
3adcebb2 | 2562 | |
a6d5a51c TH |
2563 | /* step 1: calculate xfer_mask */ |
2564 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
acf356b1 | 2565 | unsigned int pio_mask, dma_mask; |
a6d5a51c | 2566 | |
e8e0619f TH |
2567 | dev = &ap->device[i]; |
2568 | ||
e1211e3f | 2569 | if (!ata_dev_enabled(dev)) |
a6d5a51c TH |
2570 | continue; |
2571 | ||
3373efd8 | 2572 | ata_dev_xfermask(dev); |
1da177e4 | 2573 | |
acf356b1 TH |
2574 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
2575 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
2576 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); | |
2577 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
5444a6f4 | 2578 | |
4f65977d | 2579 | found = 1; |
5444a6f4 AC |
2580 | if (dev->dma_mode) |
2581 | used_dma = 1; | |
a6d5a51c | 2582 | } |
4f65977d | 2583 | if (!found) |
e82cbdb9 | 2584 | goto out; |
a6d5a51c TH |
2585 | |
2586 | /* step 2: always set host PIO timings */ | |
e8e0619f TH |
2587 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
2588 | dev = &ap->device[i]; | |
2589 | if (!ata_dev_enabled(dev)) | |
2590 | continue; | |
2591 | ||
2592 | if (!dev->pio_mode) { | |
f15a1daf | 2593 | ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); |
e8e0619f | 2594 | rc = -EINVAL; |
e82cbdb9 | 2595 | goto out; |
e8e0619f TH |
2596 | } |
2597 | ||
2598 | dev->xfer_mode = dev->pio_mode; | |
2599 | dev->xfer_shift = ATA_SHIFT_PIO; | |
2600 | if (ap->ops->set_piomode) | |
2601 | ap->ops->set_piomode(ap, dev); | |
2602 | } | |
1da177e4 | 2603 | |
a6d5a51c | 2604 | /* step 3: set host DMA timings */ |
e8e0619f TH |
2605 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
2606 | dev = &ap->device[i]; | |
2607 | ||
2608 | if (!ata_dev_enabled(dev) || !dev->dma_mode) | |
2609 | continue; | |
2610 | ||
2611 | dev->xfer_mode = dev->dma_mode; | |
2612 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
2613 | if (ap->ops->set_dmamode) | |
2614 | ap->ops->set_dmamode(ap, dev); | |
2615 | } | |
1da177e4 LT |
2616 | |
2617 | /* step 4: update devices' xfer mode */ | |
83206a29 | 2618 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
e8e0619f | 2619 | dev = &ap->device[i]; |
1da177e4 | 2620 | |
18d90deb | 2621 | /* don't update suspended devices' xfer mode */ |
02670bf3 | 2622 | if (!ata_dev_ready(dev)) |
83206a29 TH |
2623 | continue; |
2624 | ||
3373efd8 | 2625 | rc = ata_dev_set_mode(dev); |
5bbc53f4 | 2626 | if (rc) |
e82cbdb9 | 2627 | goto out; |
83206a29 | 2628 | } |
1da177e4 | 2629 | |
e8e0619f TH |
2630 | /* Record simplex status. If we selected DMA then the other |
2631 | * host channels are not permitted to do so. | |
5444a6f4 | 2632 | */ |
cca3974e | 2633 | if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
032af1ce | 2634 | ap->host->simplex_claimed = ap; |
5444a6f4 | 2635 | |
e8e0619f | 2636 | /* step5: chip specific finalisation */ |
1da177e4 LT |
2637 | if (ap->ops->post_set_mode) |
2638 | ap->ops->post_set_mode(ap); | |
e82cbdb9 TH |
2639 | out: |
2640 | if (rc) | |
2641 | *r_failed_dev = dev; | |
2642 | return rc; | |
1da177e4 LT |
2643 | } |
2644 | ||
04351821 A |
2645 | /** |
2646 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
2647 | * @ap: port on which timings will be programmed | |
2648 | * @r_failed_dev: out paramter for failed device | |
2649 | * | |
2650 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
2651 | * ata_set_mode() fails, pointer to the failing device is | |
2652 | * returned in @r_failed_dev. | |
2653 | * | |
2654 | * LOCKING: | |
2655 | * PCI/etc. bus probe sem. | |
2656 | * | |
2657 | * RETURNS: | |
2658 | * 0 on success, negative errno otherwise | |
2659 | */ | |
2660 | int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) | |
2661 | { | |
2662 | /* has private set_mode? */ | |
2663 | if (ap->ops->set_mode) | |
2664 | return ap->ops->set_mode(ap, r_failed_dev); | |
2665 | return ata_do_set_mode(ap, r_failed_dev); | |
2666 | } | |
2667 | ||
1fdffbce JG |
2668 | /** |
2669 | * ata_tf_to_host - issue ATA taskfile to host controller | |
2670 | * @ap: port to which command is being issued | |
2671 | * @tf: ATA taskfile register set | |
2672 | * | |
2673 | * Issues ATA taskfile register set to ATA host controller, | |
2674 | * with proper synchronization with interrupt handler and | |
2675 | * other threads. | |
2676 | * | |
2677 | * LOCKING: | |
cca3974e | 2678 | * spin_lock_irqsave(host lock) |
1fdffbce JG |
2679 | */ |
2680 | ||
2681 | static inline void ata_tf_to_host(struct ata_port *ap, | |
2682 | const struct ata_taskfile *tf) | |
2683 | { | |
2684 | ap->ops->tf_load(ap, tf); | |
2685 | ap->ops->exec_command(ap, tf); | |
2686 | } | |
2687 | ||
1da177e4 LT |
2688 | /** |
2689 | * ata_busy_sleep - sleep until BSY clears, or timeout | |
2690 | * @ap: port containing status register to be polled | |
2691 | * @tmout_pat: impatience timeout | |
2692 | * @tmout: overall timeout | |
2693 | * | |
780a87f7 JG |
2694 | * Sleep until ATA Status register bit BSY clears, |
2695 | * or a timeout occurs. | |
2696 | * | |
d1adc1bb TH |
2697 | * LOCKING: |
2698 | * Kernel thread context (may sleep). | |
2699 | * | |
2700 | * RETURNS: | |
2701 | * 0 on success, -errno otherwise. | |
1da177e4 | 2702 | */ |
d1adc1bb TH |
2703 | int ata_busy_sleep(struct ata_port *ap, |
2704 | unsigned long tmout_pat, unsigned long tmout) | |
1da177e4 LT |
2705 | { |
2706 | unsigned long timer_start, timeout; | |
2707 | u8 status; | |
2708 | ||
2709 | status = ata_busy_wait(ap, ATA_BUSY, 300); | |
2710 | timer_start = jiffies; | |
2711 | timeout = timer_start + tmout_pat; | |
d1adc1bb TH |
2712 | while (status != 0xff && (status & ATA_BUSY) && |
2713 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
2714 | msleep(50); |
2715 | status = ata_busy_wait(ap, ATA_BUSY, 3); | |
2716 | } | |
2717 | ||
d1adc1bb | 2718 | if (status != 0xff && (status & ATA_BUSY)) |
f15a1daf | 2719 | ata_port_printk(ap, KERN_WARNING, |
35aa7a43 JG |
2720 | "port is slow to respond, please be patient " |
2721 | "(Status 0x%x)\n", status); | |
1da177e4 LT |
2722 | |
2723 | timeout = timer_start + tmout; | |
d1adc1bb TH |
2724 | while (status != 0xff && (status & ATA_BUSY) && |
2725 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
2726 | msleep(50); |
2727 | status = ata_chk_status(ap); | |
2728 | } | |
2729 | ||
d1adc1bb TH |
2730 | if (status == 0xff) |
2731 | return -ENODEV; | |
2732 | ||
1da177e4 | 2733 | if (status & ATA_BUSY) { |
f15a1daf | 2734 | ata_port_printk(ap, KERN_ERR, "port failed to respond " |
35aa7a43 JG |
2735 | "(%lu secs, Status 0x%x)\n", |
2736 | tmout / HZ, status); | |
d1adc1bb | 2737 | return -EBUSY; |
1da177e4 LT |
2738 | } |
2739 | ||
2740 | return 0; | |
2741 | } | |
2742 | ||
2743 | static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask) | |
2744 | { | |
2745 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
2746 | unsigned int dev0 = devmask & (1 << 0); | |
2747 | unsigned int dev1 = devmask & (1 << 1); | |
2748 | unsigned long timeout; | |
2749 | ||
2750 | /* if device 0 was found in ata_devchk, wait for its | |
2751 | * BSY bit to clear | |
2752 | */ | |
2753 | if (dev0) | |
2754 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
2755 | ||
2756 | /* if device 1 was found in ata_devchk, wait for | |
2757 | * register access, then wait for BSY to clear | |
2758 | */ | |
2759 | timeout = jiffies + ATA_TMOUT_BOOT; | |
2760 | while (dev1) { | |
2761 | u8 nsect, lbal; | |
2762 | ||
2763 | ap->ops->dev_select(ap, 1); | |
0d5ff566 TH |
2764 | nsect = ioread8(ioaddr->nsect_addr); |
2765 | lbal = ioread8(ioaddr->lbal_addr); | |
1da177e4 LT |
2766 | if ((nsect == 1) && (lbal == 1)) |
2767 | break; | |
2768 | if (time_after(jiffies, timeout)) { | |
2769 | dev1 = 0; | |
2770 | break; | |
2771 | } | |
2772 | msleep(50); /* give drive a breather */ | |
2773 | } | |
2774 | if (dev1) | |
2775 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
2776 | ||
2777 | /* is all this really necessary? */ | |
2778 | ap->ops->dev_select(ap, 0); | |
2779 | if (dev1) | |
2780 | ap->ops->dev_select(ap, 1); | |
2781 | if (dev0) | |
2782 | ap->ops->dev_select(ap, 0); | |
2783 | } | |
2784 | ||
1da177e4 LT |
2785 | static unsigned int ata_bus_softreset(struct ata_port *ap, |
2786 | unsigned int devmask) | |
2787 | { | |
2788 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
2789 | ||
44877b4e | 2790 | DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); |
1da177e4 LT |
2791 | |
2792 | /* software reset. causes dev0 to be selected */ | |
0d5ff566 TH |
2793 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
2794 | udelay(20); /* FIXME: flush */ | |
2795 | iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); | |
2796 | udelay(20); /* FIXME: flush */ | |
2797 | iowrite8(ap->ctl, ioaddr->ctl_addr); | |
1da177e4 LT |
2798 | |
2799 | /* spec mandates ">= 2ms" before checking status. | |
2800 | * We wait 150ms, because that was the magic delay used for | |
2801 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time | |
2802 | * between when the ATA command register is written, and then | |
2803 | * status is checked. Because waiting for "a while" before | |
2804 | * checking status is fine, post SRST, we perform this magic | |
2805 | * delay here as well. | |
09c7ad79 AC |
2806 | * |
2807 | * Old drivers/ide uses the 2mS rule and then waits for ready | |
1da177e4 LT |
2808 | */ |
2809 | msleep(150); | |
2810 | ||
2e9edbf8 | 2811 | /* Before we perform post reset processing we want to see if |
298a41ca TH |
2812 | * the bus shows 0xFF because the odd clown forgets the D7 |
2813 | * pulldown resistor. | |
2814 | */ | |
d1adc1bb TH |
2815 | if (ata_check_status(ap) == 0xFF) |
2816 | return 0; | |
09c7ad79 | 2817 | |
1da177e4 LT |
2818 | ata_bus_post_reset(ap, devmask); |
2819 | ||
2820 | return 0; | |
2821 | } | |
2822 | ||
2823 | /** | |
2824 | * ata_bus_reset - reset host port and associated ATA channel | |
2825 | * @ap: port to reset | |
2826 | * | |
2827 | * This is typically the first time we actually start issuing | |
2828 | * commands to the ATA channel. We wait for BSY to clear, then | |
2829 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its | |
2830 | * result. Determine what devices, if any, are on the channel | |
2831 | * by looking at the device 0/1 error register. Look at the signature | |
2832 | * stored in each device's taskfile registers, to determine if | |
2833 | * the device is ATA or ATAPI. | |
2834 | * | |
2835 | * LOCKING: | |
0cba632b | 2836 | * PCI/etc. bus probe sem. |
cca3974e | 2837 | * Obtains host lock. |
1da177e4 LT |
2838 | * |
2839 | * SIDE EFFECTS: | |
198e0fed | 2840 | * Sets ATA_FLAG_DISABLED if bus reset fails. |
1da177e4 LT |
2841 | */ |
2842 | ||
2843 | void ata_bus_reset(struct ata_port *ap) | |
2844 | { | |
2845 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
2846 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
2847 | u8 err; | |
aec5c3c1 | 2848 | unsigned int dev0, dev1 = 0, devmask = 0; |
1da177e4 | 2849 | |
44877b4e | 2850 | DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no); |
1da177e4 LT |
2851 | |
2852 | /* determine if device 0/1 are present */ | |
2853 | if (ap->flags & ATA_FLAG_SATA_RESET) | |
2854 | dev0 = 1; | |
2855 | else { | |
2856 | dev0 = ata_devchk(ap, 0); | |
2857 | if (slave_possible) | |
2858 | dev1 = ata_devchk(ap, 1); | |
2859 | } | |
2860 | ||
2861 | if (dev0) | |
2862 | devmask |= (1 << 0); | |
2863 | if (dev1) | |
2864 | devmask |= (1 << 1); | |
2865 | ||
2866 | /* select device 0 again */ | |
2867 | ap->ops->dev_select(ap, 0); | |
2868 | ||
2869 | /* issue bus reset */ | |
2870 | if (ap->flags & ATA_FLAG_SRST) | |
aec5c3c1 TH |
2871 | if (ata_bus_softreset(ap, devmask)) |
2872 | goto err_out; | |
1da177e4 LT |
2873 | |
2874 | /* | |
2875 | * determine by signature whether we have ATA or ATAPI devices | |
2876 | */ | |
b4dc7623 | 2877 | ap->device[0].class = ata_dev_try_classify(ap, 0, &err); |
1da177e4 | 2878 | if ((slave_possible) && (err != 0x81)) |
b4dc7623 | 2879 | ap->device[1].class = ata_dev_try_classify(ap, 1, &err); |
1da177e4 LT |
2880 | |
2881 | /* re-enable interrupts */ | |
83625006 | 2882 | ap->ops->irq_on(ap); |
1da177e4 LT |
2883 | |
2884 | /* is double-select really necessary? */ | |
2885 | if (ap->device[1].class != ATA_DEV_NONE) | |
2886 | ap->ops->dev_select(ap, 1); | |
2887 | if (ap->device[0].class != ATA_DEV_NONE) | |
2888 | ap->ops->dev_select(ap, 0); | |
2889 | ||
2890 | /* if no devices were detected, disable this port */ | |
2891 | if ((ap->device[0].class == ATA_DEV_NONE) && | |
2892 | (ap->device[1].class == ATA_DEV_NONE)) | |
2893 | goto err_out; | |
2894 | ||
2895 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { | |
2896 | /* set up device control for ATA_FLAG_SATA_RESET */ | |
0d5ff566 | 2897 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
1da177e4 LT |
2898 | } |
2899 | ||
2900 | DPRINTK("EXIT\n"); | |
2901 | return; | |
2902 | ||
2903 | err_out: | |
f15a1daf | 2904 | ata_port_printk(ap, KERN_ERR, "disabling port\n"); |
1da177e4 LT |
2905 | ap->ops->port_disable(ap); |
2906 | ||
2907 | DPRINTK("EXIT\n"); | |
2908 | } | |
2909 | ||
d7bb4cc7 TH |
2910 | /** |
2911 | * sata_phy_debounce - debounce SATA phy status | |
2912 | * @ap: ATA port to debounce SATA phy status for | |
2913 | * @params: timing parameters { interval, duratinon, timeout } in msec | |
2914 | * | |
2915 | * Make sure SStatus of @ap reaches stable state, determined by | |
2916 | * holding the same value where DET is not 1 for @duration polled | |
2917 | * every @interval, before @timeout. Timeout constraints the | |
2918 | * beginning of the stable state. Because, after hot unplugging, | |
2919 | * DET gets stuck at 1 on some controllers, this functions waits | |
2920 | * until timeout then returns 0 if DET is stable at 1. | |
2921 | * | |
2922 | * LOCKING: | |
2923 | * Kernel thread context (may sleep) | |
2924 | * | |
2925 | * RETURNS: | |
2926 | * 0 on success, -errno on failure. | |
2927 | */ | |
2928 | int sata_phy_debounce(struct ata_port *ap, const unsigned long *params) | |
7a7921e8 | 2929 | { |
d7bb4cc7 TH |
2930 | unsigned long interval_msec = params[0]; |
2931 | unsigned long duration = params[1] * HZ / 1000; | |
2932 | unsigned long timeout = jiffies + params[2] * HZ / 1000; | |
2933 | unsigned long last_jiffies; | |
2934 | u32 last, cur; | |
2935 | int rc; | |
2936 | ||
2937 | if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) | |
2938 | return rc; | |
2939 | cur &= 0xf; | |
2940 | ||
2941 | last = cur; | |
2942 | last_jiffies = jiffies; | |
2943 | ||
2944 | while (1) { | |
2945 | msleep(interval_msec); | |
2946 | if ((rc = sata_scr_read(ap, SCR_STATUS, &cur))) | |
2947 | return rc; | |
2948 | cur &= 0xf; | |
2949 | ||
2950 | /* DET stable? */ | |
2951 | if (cur == last) { | |
2952 | if (cur == 1 && time_before(jiffies, timeout)) | |
2953 | continue; | |
2954 | if (time_after(jiffies, last_jiffies + duration)) | |
2955 | return 0; | |
2956 | continue; | |
2957 | } | |
2958 | ||
2959 | /* unstable, start over */ | |
2960 | last = cur; | |
2961 | last_jiffies = jiffies; | |
2962 | ||
2963 | /* check timeout */ | |
2964 | if (time_after(jiffies, timeout)) | |
2965 | return -EBUSY; | |
2966 | } | |
2967 | } | |
2968 | ||
2969 | /** | |
2970 | * sata_phy_resume - resume SATA phy | |
2971 | * @ap: ATA port to resume SATA phy for | |
2972 | * @params: timing parameters { interval, duratinon, timeout } in msec | |
2973 | * | |
2974 | * Resume SATA phy of @ap and debounce it. | |
2975 | * | |
2976 | * LOCKING: | |
2977 | * Kernel thread context (may sleep) | |
2978 | * | |
2979 | * RETURNS: | |
2980 | * 0 on success, -errno on failure. | |
2981 | */ | |
2982 | int sata_phy_resume(struct ata_port *ap, const unsigned long *params) | |
2983 | { | |
2984 | u32 scontrol; | |
81952c54 TH |
2985 | int rc; |
2986 | ||
2987 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) | |
2988 | return rc; | |
7a7921e8 | 2989 | |
852ee16a | 2990 | scontrol = (scontrol & 0x0f0) | 0x300; |
81952c54 TH |
2991 | |
2992 | if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) | |
2993 | return rc; | |
7a7921e8 | 2994 | |
d7bb4cc7 TH |
2995 | /* Some PHYs react badly if SStatus is pounded immediately |
2996 | * after resuming. Delay 200ms before debouncing. | |
2997 | */ | |
2998 | msleep(200); | |
7a7921e8 | 2999 | |
d7bb4cc7 | 3000 | return sata_phy_debounce(ap, params); |
7a7921e8 TH |
3001 | } |
3002 | ||
f5914a46 TH |
3003 | static void ata_wait_spinup(struct ata_port *ap) |
3004 | { | |
3005 | struct ata_eh_context *ehc = &ap->eh_context; | |
3006 | unsigned long end, secs; | |
3007 | int rc; | |
3008 | ||
3009 | /* first, debounce phy if SATA */ | |
3010 | if (ap->cbl == ATA_CBL_SATA) { | |
e9c83914 | 3011 | rc = sata_phy_debounce(ap, sata_deb_timing_hotplug); |
f5914a46 TH |
3012 | |
3013 | /* if debounced successfully and offline, no need to wait */ | |
3014 | if ((rc == 0 || rc == -EOPNOTSUPP) && ata_port_offline(ap)) | |
3015 | return; | |
3016 | } | |
3017 | ||
3018 | /* okay, let's give the drive time to spin up */ | |
3019 | end = ehc->i.hotplug_timestamp + ATA_SPINUP_WAIT * HZ / 1000; | |
3020 | secs = ((end - jiffies) + HZ - 1) / HZ; | |
3021 | ||
3022 | if (time_after(jiffies, end)) | |
3023 | return; | |
3024 | ||
3025 | if (secs > 5) | |
3026 | ata_port_printk(ap, KERN_INFO, "waiting for device to spin up " | |
3027 | "(%lu secs)\n", secs); | |
3028 | ||
3029 | schedule_timeout_uninterruptible(end - jiffies); | |
3030 | } | |
3031 | ||
3032 | /** | |
3033 | * ata_std_prereset - prepare for reset | |
3034 | * @ap: ATA port to be reset | |
3035 | * | |
3036 | * @ap is about to be reset. Initialize it. | |
3037 | * | |
3038 | * LOCKING: | |
3039 | * Kernel thread context (may sleep) | |
3040 | * | |
3041 | * RETURNS: | |
3042 | * 0 on success, -errno otherwise. | |
3043 | */ | |
3044 | int ata_std_prereset(struct ata_port *ap) | |
3045 | { | |
3046 | struct ata_eh_context *ehc = &ap->eh_context; | |
e9c83914 | 3047 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
f5914a46 TH |
3048 | int rc; |
3049 | ||
28324304 TH |
3050 | /* handle link resume & hotplug spinup */ |
3051 | if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && | |
3052 | (ap->flags & ATA_FLAG_HRST_TO_RESUME)) | |
3053 | ehc->i.action |= ATA_EH_HARDRESET; | |
3054 | ||
3055 | if ((ehc->i.flags & ATA_EHI_HOTPLUGGED) && | |
3056 | (ap->flags & ATA_FLAG_SKIP_D2H_BSY)) | |
3057 | ata_wait_spinup(ap); | |
f5914a46 TH |
3058 | |
3059 | /* if we're about to do hardreset, nothing more to do */ | |
3060 | if (ehc->i.action & ATA_EH_HARDRESET) | |
3061 | return 0; | |
3062 | ||
3063 | /* if SATA, resume phy */ | |
3064 | if (ap->cbl == ATA_CBL_SATA) { | |
f5914a46 TH |
3065 | rc = sata_phy_resume(ap, timing); |
3066 | if (rc && rc != -EOPNOTSUPP) { | |
3067 | /* phy resume failed */ | |
3068 | ata_port_printk(ap, KERN_WARNING, "failed to resume " | |
3069 | "link for reset (errno=%d)\n", rc); | |
3070 | return rc; | |
3071 | } | |
3072 | } | |
3073 | ||
3074 | /* Wait for !BSY if the controller can wait for the first D2H | |
3075 | * Reg FIS and we don't know that no device is attached. | |
3076 | */ | |
3077 | if (!(ap->flags & ATA_FLAG_SKIP_D2H_BSY) && !ata_port_offline(ap)) | |
3078 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
3079 | ||
3080 | return 0; | |
3081 | } | |
3082 | ||
c2bd5804 TH |
3083 | /** |
3084 | * ata_std_softreset - reset host port via ATA SRST | |
3085 | * @ap: port to reset | |
c2bd5804 TH |
3086 | * @classes: resulting classes of attached devices |
3087 | * | |
52783c5d | 3088 | * Reset host port using ATA SRST. |
c2bd5804 TH |
3089 | * |
3090 | * LOCKING: | |
3091 | * Kernel thread context (may sleep) | |
3092 | * | |
3093 | * RETURNS: | |
3094 | * 0 on success, -errno otherwise. | |
3095 | */ | |
2bf2cb26 | 3096 | int ata_std_softreset(struct ata_port *ap, unsigned int *classes) |
c2bd5804 TH |
3097 | { |
3098 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
3099 | unsigned int devmask = 0, err_mask; | |
3100 | u8 err; | |
3101 | ||
3102 | DPRINTK("ENTER\n"); | |
3103 | ||
81952c54 | 3104 | if (ata_port_offline(ap)) { |
3a39746a TH |
3105 | classes[0] = ATA_DEV_NONE; |
3106 | goto out; | |
3107 | } | |
3108 | ||
c2bd5804 TH |
3109 | /* determine if device 0/1 are present */ |
3110 | if (ata_devchk(ap, 0)) | |
3111 | devmask |= (1 << 0); | |
3112 | if (slave_possible && ata_devchk(ap, 1)) | |
3113 | devmask |= (1 << 1); | |
3114 | ||
c2bd5804 TH |
3115 | /* select device 0 again */ |
3116 | ap->ops->dev_select(ap, 0); | |
3117 | ||
3118 | /* issue bus reset */ | |
3119 | DPRINTK("about to softreset, devmask=%x\n", devmask); | |
3120 | err_mask = ata_bus_softreset(ap, devmask); | |
3121 | if (err_mask) { | |
f15a1daf TH |
3122 | ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n", |
3123 | err_mask); | |
c2bd5804 TH |
3124 | return -EIO; |
3125 | } | |
3126 | ||
3127 | /* determine by signature whether we have ATA or ATAPI devices */ | |
3128 | classes[0] = ata_dev_try_classify(ap, 0, &err); | |
3129 | if (slave_possible && err != 0x81) | |
3130 | classes[1] = ata_dev_try_classify(ap, 1, &err); | |
3131 | ||
3a39746a | 3132 | out: |
c2bd5804 TH |
3133 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
3134 | return 0; | |
3135 | } | |
3136 | ||
3137 | /** | |
b6103f6d | 3138 | * sata_port_hardreset - reset port via SATA phy reset |
c2bd5804 | 3139 | * @ap: port to reset |
b6103f6d | 3140 | * @timing: timing parameters { interval, duratinon, timeout } in msec |
c2bd5804 TH |
3141 | * |
3142 | * SATA phy-reset host port using DET bits of SControl register. | |
c2bd5804 TH |
3143 | * |
3144 | * LOCKING: | |
3145 | * Kernel thread context (may sleep) | |
3146 | * | |
3147 | * RETURNS: | |
3148 | * 0 on success, -errno otherwise. | |
3149 | */ | |
b6103f6d | 3150 | int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing) |
c2bd5804 | 3151 | { |
852ee16a | 3152 | u32 scontrol; |
81952c54 | 3153 | int rc; |
852ee16a | 3154 | |
c2bd5804 TH |
3155 | DPRINTK("ENTER\n"); |
3156 | ||
3c567b7d | 3157 | if (sata_set_spd_needed(ap)) { |
1c3fae4d TH |
3158 | /* SATA spec says nothing about how to reconfigure |
3159 | * spd. To be on the safe side, turn off phy during | |
3160 | * reconfiguration. This works for at least ICH7 AHCI | |
3161 | * and Sil3124. | |
3162 | */ | |
81952c54 | 3163 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
b6103f6d | 3164 | goto out; |
81952c54 | 3165 | |
a34b6fc0 | 3166 | scontrol = (scontrol & 0x0f0) | 0x304; |
81952c54 TH |
3167 | |
3168 | if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) | |
b6103f6d | 3169 | goto out; |
1c3fae4d | 3170 | |
3c567b7d | 3171 | sata_set_spd(ap); |
1c3fae4d TH |
3172 | } |
3173 | ||
3174 | /* issue phy wake/reset */ | |
81952c54 | 3175 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
b6103f6d | 3176 | goto out; |
81952c54 | 3177 | |
852ee16a | 3178 | scontrol = (scontrol & 0x0f0) | 0x301; |
81952c54 TH |
3179 | |
3180 | if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol))) | |
b6103f6d | 3181 | goto out; |
c2bd5804 | 3182 | |
1c3fae4d | 3183 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
c2bd5804 TH |
3184 | * 10.4.2 says at least 1 ms. |
3185 | */ | |
3186 | msleep(1); | |
3187 | ||
1c3fae4d | 3188 | /* bring phy back */ |
b6103f6d TH |
3189 | rc = sata_phy_resume(ap, timing); |
3190 | out: | |
3191 | DPRINTK("EXIT, rc=%d\n", rc); | |
3192 | return rc; | |
3193 | } | |
3194 | ||
3195 | /** | |
3196 | * sata_std_hardreset - reset host port via SATA phy reset | |
3197 | * @ap: port to reset | |
3198 | * @class: resulting class of attached device | |
3199 | * | |
3200 | * SATA phy-reset host port using DET bits of SControl register, | |
3201 | * wait for !BSY and classify the attached device. | |
3202 | * | |
3203 | * LOCKING: | |
3204 | * Kernel thread context (may sleep) | |
3205 | * | |
3206 | * RETURNS: | |
3207 | * 0 on success, -errno otherwise. | |
3208 | */ | |
3209 | int sata_std_hardreset(struct ata_port *ap, unsigned int *class) | |
3210 | { | |
3211 | const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context); | |
3212 | int rc; | |
3213 | ||
3214 | DPRINTK("ENTER\n"); | |
3215 | ||
3216 | /* do hardreset */ | |
3217 | rc = sata_port_hardreset(ap, timing); | |
3218 | if (rc) { | |
3219 | ata_port_printk(ap, KERN_ERR, | |
3220 | "COMRESET failed (errno=%d)\n", rc); | |
3221 | return rc; | |
3222 | } | |
c2bd5804 | 3223 | |
c2bd5804 | 3224 | /* TODO: phy layer with polling, timeouts, etc. */ |
81952c54 | 3225 | if (ata_port_offline(ap)) { |
c2bd5804 TH |
3226 | *class = ATA_DEV_NONE; |
3227 | DPRINTK("EXIT, link offline\n"); | |
3228 | return 0; | |
3229 | } | |
3230 | ||
34fee227 TH |
3231 | /* wait a while before checking status, see SRST for more info */ |
3232 | msleep(150); | |
3233 | ||
c2bd5804 | 3234 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { |
f15a1daf TH |
3235 | ata_port_printk(ap, KERN_ERR, |
3236 | "COMRESET failed (device not ready)\n"); | |
c2bd5804 TH |
3237 | return -EIO; |
3238 | } | |
3239 | ||
3a39746a TH |
3240 | ap->ops->dev_select(ap, 0); /* probably unnecessary */ |
3241 | ||
c2bd5804 TH |
3242 | *class = ata_dev_try_classify(ap, 0, NULL); |
3243 | ||
3244 | DPRINTK("EXIT, class=%u\n", *class); | |
3245 | return 0; | |
3246 | } | |
3247 | ||
3248 | /** | |
3249 | * ata_std_postreset - standard postreset callback | |
3250 | * @ap: the target ata_port | |
3251 | * @classes: classes of attached devices | |
3252 | * | |
3253 | * This function is invoked after a successful reset. Note that | |
3254 | * the device might have been reset more than once using | |
3255 | * different reset methods before postreset is invoked. | |
c2bd5804 | 3256 | * |
c2bd5804 TH |
3257 | * LOCKING: |
3258 | * Kernel thread context (may sleep) | |
3259 | */ | |
3260 | void ata_std_postreset(struct ata_port *ap, unsigned int *classes) | |
3261 | { | |
dc2b3515 TH |
3262 | u32 serror; |
3263 | ||
c2bd5804 TH |
3264 | DPRINTK("ENTER\n"); |
3265 | ||
c2bd5804 | 3266 | /* print link status */ |
81952c54 | 3267 | sata_print_link_status(ap); |
c2bd5804 | 3268 | |
dc2b3515 TH |
3269 | /* clear SError */ |
3270 | if (sata_scr_read(ap, SCR_ERROR, &serror) == 0) | |
3271 | sata_scr_write(ap, SCR_ERROR, serror); | |
3272 | ||
3a39746a | 3273 | /* re-enable interrupts */ |
83625006 AI |
3274 | if (!ap->ops->error_handler) |
3275 | ap->ops->irq_on(ap); | |
c2bd5804 TH |
3276 | |
3277 | /* is double-select really necessary? */ | |
3278 | if (classes[0] != ATA_DEV_NONE) | |
3279 | ap->ops->dev_select(ap, 1); | |
3280 | if (classes[1] != ATA_DEV_NONE) | |
3281 | ap->ops->dev_select(ap, 0); | |
3282 | ||
3a39746a TH |
3283 | /* bail out if no device is present */ |
3284 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { | |
3285 | DPRINTK("EXIT, no device\n"); | |
3286 | return; | |
3287 | } | |
3288 | ||
3289 | /* set up device control */ | |
0d5ff566 TH |
3290 | if (ap->ioaddr.ctl_addr) |
3291 | iowrite8(ap->ctl, ap->ioaddr.ctl_addr); | |
c2bd5804 TH |
3292 | |
3293 | DPRINTK("EXIT\n"); | |
3294 | } | |
3295 | ||
623a3128 TH |
3296 | /** |
3297 | * ata_dev_same_device - Determine whether new ID matches configured device | |
623a3128 TH |
3298 | * @dev: device to compare against |
3299 | * @new_class: class of the new device | |
3300 | * @new_id: IDENTIFY page of the new device | |
3301 | * | |
3302 | * Compare @new_class and @new_id against @dev and determine | |
3303 | * whether @dev is the device indicated by @new_class and | |
3304 | * @new_id. | |
3305 | * | |
3306 | * LOCKING: | |
3307 | * None. | |
3308 | * | |
3309 | * RETURNS: | |
3310 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
3311 | */ | |
3373efd8 TH |
3312 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
3313 | const u16 *new_id) | |
623a3128 TH |
3314 | { |
3315 | const u16 *old_id = dev->id; | |
a0cf733b TH |
3316 | unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
3317 | unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; | |
623a3128 TH |
3318 | u64 new_n_sectors; |
3319 | ||
3320 | if (dev->class != new_class) { | |
f15a1daf TH |
3321 | ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", |
3322 | dev->class, new_class); | |
623a3128 TH |
3323 | return 0; |
3324 | } | |
3325 | ||
a0cf733b TH |
3326 | ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
3327 | ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); | |
3328 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); | |
3329 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); | |
623a3128 TH |
3330 | new_n_sectors = ata_id_n_sectors(new_id); |
3331 | ||
3332 | if (strcmp(model[0], model[1])) { | |
f15a1daf TH |
3333 | ata_dev_printk(dev, KERN_INFO, "model number mismatch " |
3334 | "'%s' != '%s'\n", model[0], model[1]); | |
623a3128 TH |
3335 | return 0; |
3336 | } | |
3337 | ||
3338 | if (strcmp(serial[0], serial[1])) { | |
f15a1daf TH |
3339 | ata_dev_printk(dev, KERN_INFO, "serial number mismatch " |
3340 | "'%s' != '%s'\n", serial[0], serial[1]); | |
623a3128 TH |
3341 | return 0; |
3342 | } | |
3343 | ||
3344 | if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) { | |
f15a1daf TH |
3345 | ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " |
3346 | "%llu != %llu\n", | |
3347 | (unsigned long long)dev->n_sectors, | |
3348 | (unsigned long long)new_n_sectors); | |
623a3128 TH |
3349 | return 0; |
3350 | } | |
3351 | ||
3352 | return 1; | |
3353 | } | |
3354 | ||
3355 | /** | |
3356 | * ata_dev_revalidate - Revalidate ATA device | |
623a3128 | 3357 | * @dev: device to revalidate |
bff04647 | 3358 | * @readid_flags: read ID flags |
623a3128 TH |
3359 | * |
3360 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
3361 | * the port. | |
3362 | * | |
3363 | * LOCKING: | |
3364 | * Kernel thread context (may sleep) | |
3365 | * | |
3366 | * RETURNS: | |
3367 | * 0 on success, negative errno otherwise | |
3368 | */ | |
bff04647 | 3369 | int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags) |
623a3128 | 3370 | { |
5eb45c02 | 3371 | unsigned int class = dev->class; |
f15a1daf | 3372 | u16 *id = (void *)dev->ap->sector_buf; |
623a3128 TH |
3373 | int rc; |
3374 | ||
5eb45c02 TH |
3375 | if (!ata_dev_enabled(dev)) { |
3376 | rc = -ENODEV; | |
3377 | goto fail; | |
3378 | } | |
623a3128 | 3379 | |
fe635c7e | 3380 | /* read ID data */ |
bff04647 | 3381 | rc = ata_dev_read_id(dev, &class, readid_flags, id); |
623a3128 TH |
3382 | if (rc) |
3383 | goto fail; | |
3384 | ||
3385 | /* is the device still there? */ | |
3373efd8 | 3386 | if (!ata_dev_same_device(dev, class, id)) { |
623a3128 TH |
3387 | rc = -ENODEV; |
3388 | goto fail; | |
3389 | } | |
3390 | ||
fe635c7e | 3391 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
623a3128 TH |
3392 | |
3393 | /* configure device according to the new ID */ | |
efdaedc4 | 3394 | rc = ata_dev_configure(dev); |
5eb45c02 TH |
3395 | if (rc == 0) |
3396 | return 0; | |
623a3128 TH |
3397 | |
3398 | fail: | |
f15a1daf | 3399 | ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); |
623a3128 TH |
3400 | return rc; |
3401 | } | |
3402 | ||
6919a0a6 AC |
3403 | struct ata_blacklist_entry { |
3404 | const char *model_num; | |
3405 | const char *model_rev; | |
3406 | unsigned long horkage; | |
3407 | }; | |
3408 | ||
3409 | static const struct ata_blacklist_entry ata_device_blacklist [] = { | |
3410 | /* Devices with DMA related problems under Linux */ | |
3411 | { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, | |
3412 | { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, | |
3413 | { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, | |
3414 | { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, | |
3415 | { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, | |
3416 | { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, | |
3417 | { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, | |
3418 | { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, | |
3419 | { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, | |
3420 | { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, | |
3421 | { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, | |
3422 | { "CRD-84", NULL, ATA_HORKAGE_NODMA }, | |
3423 | { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, | |
3424 | { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, | |
3425 | { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, | |
3426 | { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, | |
3427 | { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, | |
3428 | { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, | |
3429 | { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, | |
3430 | { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, | |
3431 | { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, | |
3432 | { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, | |
3433 | { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, | |
3434 | { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, | |
3435 | { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, | |
3436 | { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, | |
6919a0a6 AC |
3437 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
3438 | { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, | |
3439 | { "SAMSUNG CD-ROM SN-124","N001", ATA_HORKAGE_NODMA }, | |
3440 | ||
18d6e9d5 | 3441 | /* Weird ATAPI devices */ |
6f23a31d AL |
3442 | { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 | |
3443 | ATA_HORKAGE_DMA_RW_ONLY }, | |
18d6e9d5 | 3444 | |
6919a0a6 AC |
3445 | /* Devices we expect to fail diagnostics */ |
3446 | ||
3447 | /* Devices where NCQ should be avoided */ | |
3448 | /* NCQ is slow */ | |
3449 | { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, | |
09125ea6 TH |
3450 | /* http://thread.gmane.org/gmane.linux.ide/14907 */ |
3451 | { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, | |
7acfaf30 PR |
3452 | /* NCQ is broken */ |
3453 | { "Maxtor 6L250S0", "BANC1G10", ATA_HORKAGE_NONCQ }, | |
96442925 JA |
3454 | /* NCQ hard hangs device under heavier load, needs hard power cycle */ |
3455 | { "Maxtor 6B250S0", "BANC1B70", ATA_HORKAGE_NONCQ }, | |
36e337d0 RH |
3456 | /* Blacklist entries taken from Silicon Image 3124/3132 |
3457 | Windows driver .inf file - also several Linux problem reports */ | |
3458 | { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, | |
3459 | { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, | |
3460 | { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, | |
6919a0a6 AC |
3461 | |
3462 | /* Devices with NCQ limits */ | |
3463 | ||
3464 | /* End Marker */ | |
3465 | { } | |
1da177e4 | 3466 | }; |
2e9edbf8 | 3467 | |
6919a0a6 | 3468 | unsigned long ata_device_blacklisted(const struct ata_device *dev) |
1da177e4 | 3469 | { |
8bfa79fc TH |
3470 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
3471 | unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; | |
6919a0a6 | 3472 | const struct ata_blacklist_entry *ad = ata_device_blacklist; |
3a778275 | 3473 | |
8bfa79fc TH |
3474 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
3475 | ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); | |
1da177e4 | 3476 | |
6919a0a6 | 3477 | while (ad->model_num) { |
8bfa79fc | 3478 | if (!strcmp(ad->model_num, model_num)) { |
6919a0a6 AC |
3479 | if (ad->model_rev == NULL) |
3480 | return ad->horkage; | |
8bfa79fc | 3481 | if (!strcmp(ad->model_rev, model_rev)) |
6919a0a6 | 3482 | return ad->horkage; |
f4b15fef | 3483 | } |
6919a0a6 | 3484 | ad++; |
f4b15fef | 3485 | } |
1da177e4 LT |
3486 | return 0; |
3487 | } | |
3488 | ||
6919a0a6 AC |
3489 | static int ata_dma_blacklisted(const struct ata_device *dev) |
3490 | { | |
3491 | /* We don't support polling DMA. | |
3492 | * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) | |
3493 | * if the LLDD handles only interrupts in the HSM_ST_LAST state. | |
3494 | */ | |
3495 | if ((dev->ap->flags & ATA_FLAG_PIO_POLLING) && | |
3496 | (dev->flags & ATA_DFLAG_CDB_INTR)) | |
3497 | return 1; | |
3498 | return (ata_device_blacklisted(dev) & ATA_HORKAGE_NODMA) ? 1 : 0; | |
3499 | } | |
3500 | ||
a6d5a51c TH |
3501 | /** |
3502 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
a6d5a51c TH |
3503 | * @dev: Device to compute xfermask for |
3504 | * | |
acf356b1 TH |
3505 | * Compute supported xfermask of @dev and store it in |
3506 | * dev->*_mask. This function is responsible for applying all | |
3507 | * known limits including host controller limits, device | |
3508 | * blacklist, etc... | |
a6d5a51c TH |
3509 | * |
3510 | * LOCKING: | |
3511 | * None. | |
a6d5a51c | 3512 | */ |
3373efd8 | 3513 | static void ata_dev_xfermask(struct ata_device *dev) |
1da177e4 | 3514 | { |
3373efd8 | 3515 | struct ata_port *ap = dev->ap; |
cca3974e | 3516 | struct ata_host *host = ap->host; |
a6d5a51c | 3517 | unsigned long xfer_mask; |
1da177e4 | 3518 | |
37deecb5 | 3519 | /* controller modes available */ |
565083e1 TH |
3520 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
3521 | ap->mwdma_mask, ap->udma_mask); | |
3522 | ||
8343f889 | 3523 | /* drive modes available */ |
37deecb5 TH |
3524 | xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
3525 | dev->mwdma_mask, dev->udma_mask); | |
3526 | xfer_mask &= ata_id_xfermask(dev->id); | |
565083e1 | 3527 | |
b352e57d AC |
3528 | /* |
3529 | * CFA Advanced TrueIDE timings are not allowed on a shared | |
3530 | * cable | |
3531 | */ | |
3532 | if (ata_dev_pair(dev)) { | |
3533 | /* No PIO5 or PIO6 */ | |
3534 | xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); | |
3535 | /* No MWDMA3 or MWDMA 4 */ | |
3536 | xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); | |
3537 | } | |
3538 | ||
37deecb5 TH |
3539 | if (ata_dma_blacklisted(dev)) { |
3540 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
f15a1daf TH |
3541 | ata_dev_printk(dev, KERN_WARNING, |
3542 | "device is on DMA blacklist, disabling DMA\n"); | |
37deecb5 | 3543 | } |
a6d5a51c | 3544 | |
14d66ab7 PV |
3545 | if ((host->flags & ATA_HOST_SIMPLEX) && |
3546 | host->simplex_claimed && host->simplex_claimed != ap) { | |
37deecb5 TH |
3547 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
3548 | ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " | |
3549 | "other device, disabling DMA\n"); | |
5444a6f4 | 3550 | } |
565083e1 | 3551 | |
e424675f JG |
3552 | if (ap->flags & ATA_FLAG_NO_IORDY) |
3553 | xfer_mask &= ata_pio_mask_no_iordy(dev); | |
3554 | ||
5444a6f4 | 3555 | if (ap->ops->mode_filter) |
a76b62ca | 3556 | xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
5444a6f4 | 3557 | |
8343f889 RH |
3558 | /* Apply cable rule here. Don't apply it early because when |
3559 | * we handle hot plug the cable type can itself change. | |
3560 | * Check this last so that we know if the transfer rate was | |
3561 | * solely limited by the cable. | |
3562 | * Unknown or 80 wire cables reported host side are checked | |
3563 | * drive side as well. Cases where we know a 40wire cable | |
3564 | * is used safely for 80 are not checked here. | |
3565 | */ | |
3566 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) | |
3567 | /* UDMA/44 or higher would be available */ | |
3568 | if((ap->cbl == ATA_CBL_PATA40) || | |
3569 | (ata_drive_40wire(dev->id) && | |
3570 | (ap->cbl == ATA_CBL_PATA_UNK || | |
3571 | ap->cbl == ATA_CBL_PATA80))) { | |
3572 | ata_dev_printk(dev, KERN_WARNING, | |
3573 | "limited to UDMA/33 due to 40-wire cable\n"); | |
3574 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); | |
3575 | } | |
3576 | ||
565083e1 TH |
3577 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
3578 | &dev->mwdma_mask, &dev->udma_mask); | |
1da177e4 LT |
3579 | } |
3580 | ||
1da177e4 LT |
3581 | /** |
3582 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
1da177e4 LT |
3583 | * @dev: Device to which command will be sent |
3584 | * | |
780a87f7 JG |
3585 | * Issue SET FEATURES - XFER MODE command to device @dev |
3586 | * on port @ap. | |
3587 | * | |
1da177e4 | 3588 | * LOCKING: |
0cba632b | 3589 | * PCI/etc. bus probe sem. |
83206a29 TH |
3590 | * |
3591 | * RETURNS: | |
3592 | * 0 on success, AC_ERR_* mask otherwise. | |
1da177e4 LT |
3593 | */ |
3594 | ||
3373efd8 | 3595 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
1da177e4 | 3596 | { |
a0123703 | 3597 | struct ata_taskfile tf; |
83206a29 | 3598 | unsigned int err_mask; |
1da177e4 LT |
3599 | |
3600 | /* set up set-features taskfile */ | |
3601 | DPRINTK("set features - xfer mode\n"); | |
3602 | ||
3373efd8 | 3603 | ata_tf_init(dev, &tf); |
a0123703 TH |
3604 | tf.command = ATA_CMD_SET_FEATURES; |
3605 | tf.feature = SETFEATURES_XFER; | |
3606 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
3607 | tf.protocol = ATA_PROT_NODATA; | |
3608 | tf.nsect = dev->xfer_mode; | |
1da177e4 | 3609 | |
3373efd8 | 3610 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
1da177e4 | 3611 | |
83206a29 TH |
3612 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
3613 | return err_mask; | |
1da177e4 LT |
3614 | } |
3615 | ||
8bf62ece AL |
3616 | /** |
3617 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
8bf62ece | 3618 | * @dev: Device to which command will be sent |
e2a7f77a RD |
3619 | * @heads: Number of heads (taskfile parameter) |
3620 | * @sectors: Number of sectors (taskfile parameter) | |
8bf62ece AL |
3621 | * |
3622 | * LOCKING: | |
6aff8f1f TH |
3623 | * Kernel thread context (may sleep) |
3624 | * | |
3625 | * RETURNS: | |
3626 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece | 3627 | */ |
3373efd8 TH |
3628 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
3629 | u16 heads, u16 sectors) | |
8bf62ece | 3630 | { |
a0123703 | 3631 | struct ata_taskfile tf; |
6aff8f1f | 3632 | unsigned int err_mask; |
8bf62ece AL |
3633 | |
3634 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
3635 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
00b6f5e9 | 3636 | return AC_ERR_INVALID; |
8bf62ece AL |
3637 | |
3638 | /* set up init dev params taskfile */ | |
3639 | DPRINTK("init dev params \n"); | |
3640 | ||
3373efd8 | 3641 | ata_tf_init(dev, &tf); |
a0123703 TH |
3642 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
3643 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
3644 | tf.protocol = ATA_PROT_NODATA; | |
3645 | tf.nsect = sectors; | |
3646 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 3647 | |
3373efd8 | 3648 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
8bf62ece | 3649 | |
6aff8f1f TH |
3650 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
3651 | return err_mask; | |
8bf62ece AL |
3652 | } |
3653 | ||
1da177e4 | 3654 | /** |
0cba632b JG |
3655 | * ata_sg_clean - Unmap DMA memory associated with command |
3656 | * @qc: Command containing DMA memory to be released | |
3657 | * | |
3658 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
3659 | * |
3660 | * LOCKING: | |
cca3974e | 3661 | * spin_lock_irqsave(host lock) |
1da177e4 | 3662 | */ |
70e6ad0c | 3663 | void ata_sg_clean(struct ata_queued_cmd *qc) |
1da177e4 LT |
3664 | { |
3665 | struct ata_port *ap = qc->ap; | |
cedc9a47 | 3666 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 3667 | int dir = qc->dma_dir; |
cedc9a47 | 3668 | void *pad_buf = NULL; |
1da177e4 | 3669 | |
a4631474 TH |
3670 | WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); |
3671 | WARN_ON(sg == NULL); | |
1da177e4 LT |
3672 | |
3673 | if (qc->flags & ATA_QCFLAG_SINGLE) | |
f131883e | 3674 | WARN_ON(qc->n_elem > 1); |
1da177e4 | 3675 | |
2c13b7ce | 3676 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 3677 | |
cedc9a47 JG |
3678 | /* if we padded the buffer out to 32-bit bound, and data |
3679 | * xfer direction is from-device, we must copy from the | |
3680 | * pad buffer back into the supplied buffer | |
3681 | */ | |
3682 | if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) | |
3683 | pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
3684 | ||
3685 | if (qc->flags & ATA_QCFLAG_SG) { | |
e1410f2d | 3686 | if (qc->n_elem) |
2f1f610b | 3687 | dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); |
cedc9a47 JG |
3688 | /* restore last sg */ |
3689 | sg[qc->orig_n_elem - 1].length += qc->pad_len; | |
3690 | if (pad_buf) { | |
3691 | struct scatterlist *psg = &qc->pad_sgent; | |
3692 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
3693 | memcpy(addr + psg->offset, pad_buf, qc->pad_len); | |
dfa15988 | 3694 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
3695 | } |
3696 | } else { | |
2e242fa9 | 3697 | if (qc->n_elem) |
2f1f610b | 3698 | dma_unmap_single(ap->dev, |
e1410f2d JG |
3699 | sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), |
3700 | dir); | |
cedc9a47 JG |
3701 | /* restore sg */ |
3702 | sg->length += qc->pad_len; | |
3703 | if (pad_buf) | |
3704 | memcpy(qc->buf_virt + sg->length - qc->pad_len, | |
3705 | pad_buf, qc->pad_len); | |
3706 | } | |
1da177e4 LT |
3707 | |
3708 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
cedc9a47 | 3709 | qc->__sg = NULL; |
1da177e4 LT |
3710 | } |
3711 | ||
3712 | /** | |
3713 | * ata_fill_sg - Fill PCI IDE PRD table | |
3714 | * @qc: Metadata associated with taskfile to be transferred | |
3715 | * | |
780a87f7 JG |
3716 | * Fill PCI IDE PRD (scatter-gather) table with segments |
3717 | * associated with the current disk command. | |
3718 | * | |
1da177e4 | 3719 | * LOCKING: |
cca3974e | 3720 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
3721 | * |
3722 | */ | |
3723 | static void ata_fill_sg(struct ata_queued_cmd *qc) | |
3724 | { | |
1da177e4 | 3725 | struct ata_port *ap = qc->ap; |
cedc9a47 JG |
3726 | struct scatterlist *sg; |
3727 | unsigned int idx; | |
1da177e4 | 3728 | |
a4631474 | 3729 | WARN_ON(qc->__sg == NULL); |
f131883e | 3730 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); |
1da177e4 LT |
3731 | |
3732 | idx = 0; | |
cedc9a47 | 3733 | ata_for_each_sg(sg, qc) { |
1da177e4 LT |
3734 | u32 addr, offset; |
3735 | u32 sg_len, len; | |
3736 | ||
3737 | /* determine if physical DMA addr spans 64K boundary. | |
3738 | * Note h/w doesn't support 64-bit, so we unconditionally | |
3739 | * truncate dma_addr_t to u32. | |
3740 | */ | |
3741 | addr = (u32) sg_dma_address(sg); | |
3742 | sg_len = sg_dma_len(sg); | |
3743 | ||
3744 | while (sg_len) { | |
3745 | offset = addr & 0xffff; | |
3746 | len = sg_len; | |
3747 | if ((offset + sg_len) > 0x10000) | |
3748 | len = 0x10000 - offset; | |
3749 | ||
3750 | ap->prd[idx].addr = cpu_to_le32(addr); | |
3751 | ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); | |
3752 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); | |
3753 | ||
3754 | idx++; | |
3755 | sg_len -= len; | |
3756 | addr += len; | |
3757 | } | |
3758 | } | |
3759 | ||
3760 | if (idx) | |
3761 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
3762 | } | |
3763 | /** | |
3764 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported | |
3765 | * @qc: Metadata associated with taskfile to check | |
3766 | * | |
780a87f7 JG |
3767 | * Allow low-level driver to filter ATA PACKET commands, returning |
3768 | * a status indicating whether or not it is OK to use DMA for the | |
3769 | * supplied PACKET command. | |
3770 | * | |
1da177e4 | 3771 | * LOCKING: |
cca3974e | 3772 | * spin_lock_irqsave(host lock) |
0cba632b | 3773 | * |
1da177e4 LT |
3774 | * RETURNS: 0 when ATAPI DMA can be used |
3775 | * nonzero otherwise | |
3776 | */ | |
3777 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) | |
3778 | { | |
3779 | struct ata_port *ap = qc->ap; | |
3780 | int rc = 0; /* Assume ATAPI DMA is OK by default */ | |
3781 | ||
6f23a31d AL |
3782 | /* some drives can only do ATAPI DMA on read/write */ |
3783 | if (unlikely(qc->dev->horkage & ATA_HORKAGE_DMA_RW_ONLY)) { | |
3784 | struct scsi_cmnd *cmd = qc->scsicmd; | |
3785 | u8 *scsicmd = cmd->cmnd; | |
3786 | ||
3787 | switch (scsicmd[0]) { | |
3788 | case READ_10: | |
3789 | case WRITE_10: | |
3790 | case READ_12: | |
3791 | case WRITE_12: | |
3792 | case READ_6: | |
3793 | case WRITE_6: | |
3794 | /* atapi dma maybe ok */ | |
3795 | break; | |
3796 | default: | |
3797 | /* turn off atapi dma */ | |
3798 | return 1; | |
3799 | } | |
3800 | } | |
3801 | ||
1da177e4 LT |
3802 | if (ap->ops->check_atapi_dma) |
3803 | rc = ap->ops->check_atapi_dma(qc); | |
3804 | ||
3805 | return rc; | |
3806 | } | |
3807 | /** | |
3808 | * ata_qc_prep - Prepare taskfile for submission | |
3809 | * @qc: Metadata associated with taskfile to be prepared | |
3810 | * | |
780a87f7 JG |
3811 | * Prepare ATA taskfile for submission. |
3812 | * | |
1da177e4 | 3813 | * LOCKING: |
cca3974e | 3814 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
3815 | */ |
3816 | void ata_qc_prep(struct ata_queued_cmd *qc) | |
3817 | { | |
3818 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
3819 | return; | |
3820 | ||
3821 | ata_fill_sg(qc); | |
3822 | } | |
3823 | ||
e46834cd BK |
3824 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
3825 | ||
0cba632b JG |
3826 | /** |
3827 | * ata_sg_init_one - Associate command with memory buffer | |
3828 | * @qc: Command to be associated | |
3829 | * @buf: Memory buffer | |
3830 | * @buflen: Length of memory buffer, in bytes. | |
3831 | * | |
3832 | * Initialize the data-related elements of queued_cmd @qc | |
3833 | * to point to a single memory buffer, @buf of byte length @buflen. | |
3834 | * | |
3835 | * LOCKING: | |
cca3974e | 3836 | * spin_lock_irqsave(host lock) |
0cba632b JG |
3837 | */ |
3838 | ||
1da177e4 LT |
3839 | void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) |
3840 | { | |
1da177e4 LT |
3841 | qc->flags |= ATA_QCFLAG_SINGLE; |
3842 | ||
cedc9a47 | 3843 | qc->__sg = &qc->sgent; |
1da177e4 | 3844 | qc->n_elem = 1; |
cedc9a47 | 3845 | qc->orig_n_elem = 1; |
1da177e4 | 3846 | qc->buf_virt = buf; |
233277ca | 3847 | qc->nbytes = buflen; |
1da177e4 | 3848 | |
61c0596c | 3849 | sg_init_one(&qc->sgent, buf, buflen); |
1da177e4 LT |
3850 | } |
3851 | ||
0cba632b JG |
3852 | /** |
3853 | * ata_sg_init - Associate command with scatter-gather table. | |
3854 | * @qc: Command to be associated | |
3855 | * @sg: Scatter-gather table. | |
3856 | * @n_elem: Number of elements in s/g table. | |
3857 | * | |
3858 | * Initialize the data-related elements of queued_cmd @qc | |
3859 | * to point to a scatter-gather table @sg, containing @n_elem | |
3860 | * elements. | |
3861 | * | |
3862 | * LOCKING: | |
cca3974e | 3863 | * spin_lock_irqsave(host lock) |
0cba632b JG |
3864 | */ |
3865 | ||
1da177e4 LT |
3866 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
3867 | unsigned int n_elem) | |
3868 | { | |
3869 | qc->flags |= ATA_QCFLAG_SG; | |
cedc9a47 | 3870 | qc->__sg = sg; |
1da177e4 | 3871 | qc->n_elem = n_elem; |
cedc9a47 | 3872 | qc->orig_n_elem = n_elem; |
1da177e4 LT |
3873 | } |
3874 | ||
3875 | /** | |
0cba632b JG |
3876 | * ata_sg_setup_one - DMA-map the memory buffer associated with a command. |
3877 | * @qc: Command with memory buffer to be mapped. | |
3878 | * | |
3879 | * DMA-map the memory buffer associated with queued_cmd @qc. | |
1da177e4 LT |
3880 | * |
3881 | * LOCKING: | |
cca3974e | 3882 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
3883 | * |
3884 | * RETURNS: | |
0cba632b | 3885 | * Zero on success, negative on error. |
1da177e4 LT |
3886 | */ |
3887 | ||
3888 | static int ata_sg_setup_one(struct ata_queued_cmd *qc) | |
3889 | { | |
3890 | struct ata_port *ap = qc->ap; | |
3891 | int dir = qc->dma_dir; | |
cedc9a47 | 3892 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 3893 | dma_addr_t dma_address; |
2e242fa9 | 3894 | int trim_sg = 0; |
1da177e4 | 3895 | |
cedc9a47 JG |
3896 | /* we must lengthen transfers to end on a 32-bit boundary */ |
3897 | qc->pad_len = sg->length & 3; | |
3898 | if (qc->pad_len) { | |
3899 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
3900 | struct scatterlist *psg = &qc->pad_sgent; | |
3901 | ||
a4631474 | 3902 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
3903 | |
3904 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
3905 | ||
3906 | if (qc->tf.flags & ATA_TFLAG_WRITE) | |
3907 | memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, | |
3908 | qc->pad_len); | |
3909 | ||
3910 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
3911 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
3912 | /* trim sg */ | |
3913 | sg->length -= qc->pad_len; | |
2e242fa9 TH |
3914 | if (sg->length == 0) |
3915 | trim_sg = 1; | |
cedc9a47 JG |
3916 | |
3917 | DPRINTK("padding done, sg->length=%u pad_len=%u\n", | |
3918 | sg->length, qc->pad_len); | |
3919 | } | |
3920 | ||
2e242fa9 TH |
3921 | if (trim_sg) { |
3922 | qc->n_elem--; | |
e1410f2d JG |
3923 | goto skip_map; |
3924 | } | |
3925 | ||
2f1f610b | 3926 | dma_address = dma_map_single(ap->dev, qc->buf_virt, |
32529e01 | 3927 | sg->length, dir); |
537a95d9 TH |
3928 | if (dma_mapping_error(dma_address)) { |
3929 | /* restore sg */ | |
3930 | sg->length += qc->pad_len; | |
1da177e4 | 3931 | return -1; |
537a95d9 | 3932 | } |
1da177e4 LT |
3933 | |
3934 | sg_dma_address(sg) = dma_address; | |
32529e01 | 3935 | sg_dma_len(sg) = sg->length; |
1da177e4 | 3936 | |
2e242fa9 | 3937 | skip_map: |
1da177e4 LT |
3938 | DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), |
3939 | qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
3940 | ||
3941 | return 0; | |
3942 | } | |
3943 | ||
3944 | /** | |
0cba632b JG |
3945 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
3946 | * @qc: Command with scatter-gather table to be mapped. | |
3947 | * | |
3948 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
1da177e4 LT |
3949 | * |
3950 | * LOCKING: | |
cca3974e | 3951 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
3952 | * |
3953 | * RETURNS: | |
0cba632b | 3954 | * Zero on success, negative on error. |
1da177e4 LT |
3955 | * |
3956 | */ | |
3957 | ||
3958 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
3959 | { | |
3960 | struct ata_port *ap = qc->ap; | |
cedc9a47 JG |
3961 | struct scatterlist *sg = qc->__sg; |
3962 | struct scatterlist *lsg = &sg[qc->n_elem - 1]; | |
e1410f2d | 3963 | int n_elem, pre_n_elem, dir, trim_sg = 0; |
1da177e4 | 3964 | |
44877b4e | 3965 | VPRINTK("ENTER, ata%u\n", ap->print_id); |
a4631474 | 3966 | WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); |
1da177e4 | 3967 | |
cedc9a47 JG |
3968 | /* we must lengthen transfers to end on a 32-bit boundary */ |
3969 | qc->pad_len = lsg->length & 3; | |
3970 | if (qc->pad_len) { | |
3971 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
3972 | struct scatterlist *psg = &qc->pad_sgent; | |
3973 | unsigned int offset; | |
3974 | ||
a4631474 | 3975 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
3976 | |
3977 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
3978 | ||
3979 | /* | |
3980 | * psg->page/offset are used to copy to-be-written | |
3981 | * data in this function or read data in ata_sg_clean. | |
3982 | */ | |
3983 | offset = lsg->offset + lsg->length - qc->pad_len; | |
3984 | psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); | |
3985 | psg->offset = offset_in_page(offset); | |
3986 | ||
3987 | if (qc->tf.flags & ATA_TFLAG_WRITE) { | |
3988 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
3989 | memcpy(pad_buf, addr + psg->offset, qc->pad_len); | |
dfa15988 | 3990 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
3991 | } |
3992 | ||
3993 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
3994 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
3995 | /* trim last sg */ | |
3996 | lsg->length -= qc->pad_len; | |
e1410f2d JG |
3997 | if (lsg->length == 0) |
3998 | trim_sg = 1; | |
cedc9a47 JG |
3999 | |
4000 | DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", | |
4001 | qc->n_elem - 1, lsg->length, qc->pad_len); | |
4002 | } | |
4003 | ||
e1410f2d JG |
4004 | pre_n_elem = qc->n_elem; |
4005 | if (trim_sg && pre_n_elem) | |
4006 | pre_n_elem--; | |
4007 | ||
4008 | if (!pre_n_elem) { | |
4009 | n_elem = 0; | |
4010 | goto skip_map; | |
4011 | } | |
4012 | ||
1da177e4 | 4013 | dir = qc->dma_dir; |
2f1f610b | 4014 | n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); |
537a95d9 TH |
4015 | if (n_elem < 1) { |
4016 | /* restore last sg */ | |
4017 | lsg->length += qc->pad_len; | |
1da177e4 | 4018 | return -1; |
537a95d9 | 4019 | } |
1da177e4 LT |
4020 | |
4021 | DPRINTK("%d sg elements mapped\n", n_elem); | |
4022 | ||
e1410f2d | 4023 | skip_map: |
1da177e4 LT |
4024 | qc->n_elem = n_elem; |
4025 | ||
4026 | return 0; | |
4027 | } | |
4028 | ||
0baab86b | 4029 | /** |
c893a3ae | 4030 | * swap_buf_le16 - swap halves of 16-bit words in place |
0baab86b EF |
4031 | * @buf: Buffer to swap |
4032 | * @buf_words: Number of 16-bit words in buffer. | |
4033 | * | |
4034 | * Swap halves of 16-bit words if needed to convert from | |
4035 | * little-endian byte order to native cpu byte order, or | |
4036 | * vice-versa. | |
4037 | * | |
4038 | * LOCKING: | |
6f0ef4fa | 4039 | * Inherited from caller. |
0baab86b | 4040 | */ |
1da177e4 LT |
4041 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
4042 | { | |
4043 | #ifdef __BIG_ENDIAN | |
4044 | unsigned int i; | |
4045 | ||
4046 | for (i = 0; i < buf_words; i++) | |
4047 | buf[i] = le16_to_cpu(buf[i]); | |
4048 | #endif /* __BIG_ENDIAN */ | |
4049 | } | |
4050 | ||
6ae4cfb5 | 4051 | /** |
0d5ff566 | 4052 | * ata_data_xfer - Transfer data by PIO |
a6b2c5d4 | 4053 | * @adev: device to target |
6ae4cfb5 AL |
4054 | * @buf: data buffer |
4055 | * @buflen: buffer length | |
344babaa | 4056 | * @write_data: read/write |
6ae4cfb5 AL |
4057 | * |
4058 | * Transfer data from/to the device data register by PIO. | |
4059 | * | |
4060 | * LOCKING: | |
4061 | * Inherited from caller. | |
6ae4cfb5 | 4062 | */ |
0d5ff566 TH |
4063 | void ata_data_xfer(struct ata_device *adev, unsigned char *buf, |
4064 | unsigned int buflen, int write_data) | |
1da177e4 | 4065 | { |
a6b2c5d4 | 4066 | struct ata_port *ap = adev->ap; |
6ae4cfb5 | 4067 | unsigned int words = buflen >> 1; |
1da177e4 | 4068 | |
6ae4cfb5 | 4069 | /* Transfer multiple of 2 bytes */ |
1da177e4 | 4070 | if (write_data) |
0d5ff566 | 4071 | iowrite16_rep(ap->ioaddr.data_addr, buf, words); |
1da177e4 | 4072 | else |
0d5ff566 | 4073 | ioread16_rep(ap->ioaddr.data_addr, buf, words); |
6ae4cfb5 AL |
4074 | |
4075 | /* Transfer trailing 1 byte, if any. */ | |
4076 | if (unlikely(buflen & 0x01)) { | |
4077 | u16 align_buf[1] = { 0 }; | |
4078 | unsigned char *trailing_buf = buf + buflen - 1; | |
4079 | ||
4080 | if (write_data) { | |
4081 | memcpy(align_buf, trailing_buf, 1); | |
0d5ff566 | 4082 | iowrite16(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); |
6ae4cfb5 | 4083 | } else { |
0d5ff566 | 4084 | align_buf[0] = cpu_to_le16(ioread16(ap->ioaddr.data_addr)); |
6ae4cfb5 AL |
4085 | memcpy(trailing_buf, align_buf, 1); |
4086 | } | |
4087 | } | |
1da177e4 LT |
4088 | } |
4089 | ||
75e99585 | 4090 | /** |
0d5ff566 | 4091 | * ata_data_xfer_noirq - Transfer data by PIO |
75e99585 AC |
4092 | * @adev: device to target |
4093 | * @buf: data buffer | |
4094 | * @buflen: buffer length | |
4095 | * @write_data: read/write | |
4096 | * | |
88574551 | 4097 | * Transfer data from/to the device data register by PIO. Do the |
75e99585 AC |
4098 | * transfer with interrupts disabled. |
4099 | * | |
4100 | * LOCKING: | |
4101 | * Inherited from caller. | |
4102 | */ | |
0d5ff566 TH |
4103 | void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, |
4104 | unsigned int buflen, int write_data) | |
75e99585 AC |
4105 | { |
4106 | unsigned long flags; | |
4107 | local_irq_save(flags); | |
0d5ff566 | 4108 | ata_data_xfer(adev, buf, buflen, write_data); |
75e99585 AC |
4109 | local_irq_restore(flags); |
4110 | } | |
4111 | ||
4112 | ||
6ae4cfb5 | 4113 | /** |
5a5dbd18 | 4114 | * ata_pio_sector - Transfer a sector of data. |
6ae4cfb5 AL |
4115 | * @qc: Command on going |
4116 | * | |
5a5dbd18 | 4117 | * Transfer qc->sect_size bytes of data from/to the ATA device. |
6ae4cfb5 AL |
4118 | * |
4119 | * LOCKING: | |
4120 | * Inherited from caller. | |
4121 | */ | |
4122 | ||
1da177e4 LT |
4123 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
4124 | { | |
4125 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 4126 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
4127 | struct ata_port *ap = qc->ap; |
4128 | struct page *page; | |
4129 | unsigned int offset; | |
4130 | unsigned char *buf; | |
4131 | ||
5a5dbd18 | 4132 | if (qc->curbytes == qc->nbytes - qc->sect_size) |
14be71f4 | 4133 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
4134 | |
4135 | page = sg[qc->cursg].page; | |
726f0785 | 4136 | offset = sg[qc->cursg].offset + qc->cursg_ofs; |
1da177e4 LT |
4137 | |
4138 | /* get the current page and offset */ | |
4139 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
4140 | offset %= PAGE_SIZE; | |
4141 | ||
1da177e4 LT |
4142 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
4143 | ||
91b8b313 AL |
4144 | if (PageHighMem(page)) { |
4145 | unsigned long flags; | |
4146 | ||
a6b2c5d4 | 4147 | /* FIXME: use a bounce buffer */ |
91b8b313 AL |
4148 | local_irq_save(flags); |
4149 | buf = kmap_atomic(page, KM_IRQ0); | |
083958d3 | 4150 | |
91b8b313 | 4151 | /* do the actual data transfer */ |
5a5dbd18 | 4152 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); |
1da177e4 | 4153 | |
91b8b313 AL |
4154 | kunmap_atomic(buf, KM_IRQ0); |
4155 | local_irq_restore(flags); | |
4156 | } else { | |
4157 | buf = page_address(page); | |
5a5dbd18 | 4158 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); |
91b8b313 | 4159 | } |
1da177e4 | 4160 | |
5a5dbd18 ML |
4161 | qc->curbytes += qc->sect_size; |
4162 | qc->cursg_ofs += qc->sect_size; | |
1da177e4 | 4163 | |
726f0785 | 4164 | if (qc->cursg_ofs == (&sg[qc->cursg])->length) { |
1da177e4 LT |
4165 | qc->cursg++; |
4166 | qc->cursg_ofs = 0; | |
4167 | } | |
1da177e4 | 4168 | } |
1da177e4 | 4169 | |
07f6f7d0 | 4170 | /** |
5a5dbd18 | 4171 | * ata_pio_sectors - Transfer one or many sectors. |
07f6f7d0 AL |
4172 | * @qc: Command on going |
4173 | * | |
5a5dbd18 | 4174 | * Transfer one or many sectors of data from/to the |
07f6f7d0 AL |
4175 | * ATA device for the DRQ request. |
4176 | * | |
4177 | * LOCKING: | |
4178 | * Inherited from caller. | |
4179 | */ | |
1da177e4 | 4180 | |
07f6f7d0 AL |
4181 | static void ata_pio_sectors(struct ata_queued_cmd *qc) |
4182 | { | |
4183 | if (is_multi_taskfile(&qc->tf)) { | |
4184 | /* READ/WRITE MULTIPLE */ | |
4185 | unsigned int nsect; | |
4186 | ||
587005de | 4187 | WARN_ON(qc->dev->multi_count == 0); |
1da177e4 | 4188 | |
5a5dbd18 | 4189 | nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, |
726f0785 | 4190 | qc->dev->multi_count); |
07f6f7d0 AL |
4191 | while (nsect--) |
4192 | ata_pio_sector(qc); | |
4193 | } else | |
4194 | ata_pio_sector(qc); | |
4195 | } | |
4196 | ||
c71c1857 AL |
4197 | /** |
4198 | * atapi_send_cdb - Write CDB bytes to hardware | |
4199 | * @ap: Port to which ATAPI device is attached. | |
4200 | * @qc: Taskfile currently active | |
4201 | * | |
4202 | * When device has indicated its readiness to accept | |
4203 | * a CDB, this function is called. Send the CDB. | |
4204 | * | |
4205 | * LOCKING: | |
4206 | * caller. | |
4207 | */ | |
4208 | ||
4209 | static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) | |
4210 | { | |
4211 | /* send SCSI cdb */ | |
4212 | DPRINTK("send cdb\n"); | |
db024d53 | 4213 | WARN_ON(qc->dev->cdb_len < 12); |
c71c1857 | 4214 | |
a6b2c5d4 | 4215 | ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); |
c71c1857 AL |
4216 | ata_altstatus(ap); /* flush */ |
4217 | ||
4218 | switch (qc->tf.protocol) { | |
4219 | case ATA_PROT_ATAPI: | |
4220 | ap->hsm_task_state = HSM_ST; | |
4221 | break; | |
4222 | case ATA_PROT_ATAPI_NODATA: | |
4223 | ap->hsm_task_state = HSM_ST_LAST; | |
4224 | break; | |
4225 | case ATA_PROT_ATAPI_DMA: | |
4226 | ap->hsm_task_state = HSM_ST_LAST; | |
4227 | /* initiate bmdma */ | |
4228 | ap->ops->bmdma_start(qc); | |
4229 | break; | |
4230 | } | |
1da177e4 LT |
4231 | } |
4232 | ||
6ae4cfb5 AL |
4233 | /** |
4234 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
4235 | * @qc: Command on going | |
4236 | * @bytes: number of bytes | |
4237 | * | |
4238 | * Transfer Transfer data from/to the ATAPI device. | |
4239 | * | |
4240 | * LOCKING: | |
4241 | * Inherited from caller. | |
4242 | * | |
4243 | */ | |
4244 | ||
1da177e4 LT |
4245 | static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
4246 | { | |
4247 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 4248 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
4249 | struct ata_port *ap = qc->ap; |
4250 | struct page *page; | |
4251 | unsigned char *buf; | |
4252 | unsigned int offset, count; | |
4253 | ||
563a6e1f | 4254 | if (qc->curbytes + bytes >= qc->nbytes) |
14be71f4 | 4255 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
4256 | |
4257 | next_sg: | |
563a6e1f | 4258 | if (unlikely(qc->cursg >= qc->n_elem)) { |
7fb6ec28 | 4259 | /* |
563a6e1f AL |
4260 | * The end of qc->sg is reached and the device expects |
4261 | * more data to transfer. In order not to overrun qc->sg | |
4262 | * and fulfill length specified in the byte count register, | |
4263 | * - for read case, discard trailing data from the device | |
4264 | * - for write case, padding zero data to the device | |
4265 | */ | |
4266 | u16 pad_buf[1] = { 0 }; | |
4267 | unsigned int words = bytes >> 1; | |
4268 | unsigned int i; | |
4269 | ||
4270 | if (words) /* warning if bytes > 1 */ | |
f15a1daf TH |
4271 | ata_dev_printk(qc->dev, KERN_WARNING, |
4272 | "%u bytes trailing data\n", bytes); | |
563a6e1f AL |
4273 | |
4274 | for (i = 0; i < words; i++) | |
a6b2c5d4 | 4275 | ap->ops->data_xfer(qc->dev, (unsigned char*)pad_buf, 2, do_write); |
563a6e1f | 4276 | |
14be71f4 | 4277 | ap->hsm_task_state = HSM_ST_LAST; |
563a6e1f AL |
4278 | return; |
4279 | } | |
4280 | ||
cedc9a47 | 4281 | sg = &qc->__sg[qc->cursg]; |
1da177e4 | 4282 | |
1da177e4 LT |
4283 | page = sg->page; |
4284 | offset = sg->offset + qc->cursg_ofs; | |
4285 | ||
4286 | /* get the current page and offset */ | |
4287 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
4288 | offset %= PAGE_SIZE; | |
4289 | ||
6952df03 | 4290 | /* don't overrun current sg */ |
32529e01 | 4291 | count = min(sg->length - qc->cursg_ofs, bytes); |
1da177e4 LT |
4292 | |
4293 | /* don't cross page boundaries */ | |
4294 | count = min(count, (unsigned int)PAGE_SIZE - offset); | |
4295 | ||
7282aa4b AL |
4296 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
4297 | ||
91b8b313 AL |
4298 | if (PageHighMem(page)) { |
4299 | unsigned long flags; | |
4300 | ||
a6b2c5d4 | 4301 | /* FIXME: use bounce buffer */ |
91b8b313 AL |
4302 | local_irq_save(flags); |
4303 | buf = kmap_atomic(page, KM_IRQ0); | |
083958d3 | 4304 | |
91b8b313 | 4305 | /* do the actual data transfer */ |
a6b2c5d4 | 4306 | ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); |
7282aa4b | 4307 | |
91b8b313 AL |
4308 | kunmap_atomic(buf, KM_IRQ0); |
4309 | local_irq_restore(flags); | |
4310 | } else { | |
4311 | buf = page_address(page); | |
a6b2c5d4 | 4312 | ap->ops->data_xfer(qc->dev, buf + offset, count, do_write); |
91b8b313 | 4313 | } |
1da177e4 LT |
4314 | |
4315 | bytes -= count; | |
4316 | qc->curbytes += count; | |
4317 | qc->cursg_ofs += count; | |
4318 | ||
32529e01 | 4319 | if (qc->cursg_ofs == sg->length) { |
1da177e4 LT |
4320 | qc->cursg++; |
4321 | qc->cursg_ofs = 0; | |
4322 | } | |
4323 | ||
563a6e1f | 4324 | if (bytes) |
1da177e4 | 4325 | goto next_sg; |
1da177e4 LT |
4326 | } |
4327 | ||
6ae4cfb5 AL |
4328 | /** |
4329 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
4330 | * @qc: Command on going | |
4331 | * | |
4332 | * Transfer Transfer data from/to the ATAPI device. | |
4333 | * | |
4334 | * LOCKING: | |
4335 | * Inherited from caller. | |
6ae4cfb5 AL |
4336 | */ |
4337 | ||
1da177e4 LT |
4338 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
4339 | { | |
4340 | struct ata_port *ap = qc->ap; | |
4341 | struct ata_device *dev = qc->dev; | |
4342 | unsigned int ireason, bc_lo, bc_hi, bytes; | |
4343 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
4344 | ||
eec4c3f3 AL |
4345 | /* Abuse qc->result_tf for temp storage of intermediate TF |
4346 | * here to save some kernel stack usage. | |
4347 | * For normal completion, qc->result_tf is not relevant. For | |
4348 | * error, qc->result_tf is later overwritten by ata_qc_complete(). | |
4349 | * So, the correctness of qc->result_tf is not affected. | |
4350 | */ | |
4351 | ap->ops->tf_read(ap, &qc->result_tf); | |
4352 | ireason = qc->result_tf.nsect; | |
4353 | bc_lo = qc->result_tf.lbam; | |
4354 | bc_hi = qc->result_tf.lbah; | |
1da177e4 LT |
4355 | bytes = (bc_hi << 8) | bc_lo; |
4356 | ||
4357 | /* shall be cleared to zero, indicating xfer of data */ | |
4358 | if (ireason & (1 << 0)) | |
4359 | goto err_out; | |
4360 | ||
4361 | /* make sure transfer direction matches expected */ | |
4362 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; | |
4363 | if (do_write != i_write) | |
4364 | goto err_out; | |
4365 | ||
44877b4e | 4366 | VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); |
312f7da2 | 4367 | |
1da177e4 LT |
4368 | __atapi_pio_bytes(qc, bytes); |
4369 | ||
4370 | return; | |
4371 | ||
4372 | err_out: | |
f15a1daf | 4373 | ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); |
11a56d24 | 4374 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 4375 | ap->hsm_task_state = HSM_ST_ERR; |
1da177e4 LT |
4376 | } |
4377 | ||
4378 | /** | |
c234fb00 AL |
4379 | * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. |
4380 | * @ap: the target ata_port | |
4381 | * @qc: qc on going | |
1da177e4 | 4382 | * |
c234fb00 AL |
4383 | * RETURNS: |
4384 | * 1 if ok in workqueue, 0 otherwise. | |
1da177e4 | 4385 | */ |
c234fb00 AL |
4386 | |
4387 | static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) | |
1da177e4 | 4388 | { |
c234fb00 AL |
4389 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
4390 | return 1; | |
1da177e4 | 4391 | |
c234fb00 AL |
4392 | if (ap->hsm_task_state == HSM_ST_FIRST) { |
4393 | if (qc->tf.protocol == ATA_PROT_PIO && | |
4394 | (qc->tf.flags & ATA_TFLAG_WRITE)) | |
4395 | return 1; | |
1da177e4 | 4396 | |
c234fb00 AL |
4397 | if (is_atapi_taskfile(&qc->tf) && |
4398 | !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
4399 | return 1; | |
fe79e683 AL |
4400 | } |
4401 | ||
c234fb00 AL |
4402 | return 0; |
4403 | } | |
1da177e4 | 4404 | |
c17ea20d TH |
4405 | /** |
4406 | * ata_hsm_qc_complete - finish a qc running on standard HSM | |
4407 | * @qc: Command to complete | |
4408 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
4409 | * | |
4410 | * Finish @qc which is running on standard HSM. | |
4411 | * | |
4412 | * LOCKING: | |
cca3974e | 4413 | * If @in_wq is zero, spin_lock_irqsave(host lock). |
c17ea20d TH |
4414 | * Otherwise, none on entry and grabs host lock. |
4415 | */ | |
4416 | static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) | |
4417 | { | |
4418 | struct ata_port *ap = qc->ap; | |
4419 | unsigned long flags; | |
4420 | ||
4421 | if (ap->ops->error_handler) { | |
4422 | if (in_wq) { | |
ba6a1308 | 4423 | spin_lock_irqsave(ap->lock, flags); |
c17ea20d | 4424 | |
cca3974e JG |
4425 | /* EH might have kicked in while host lock is |
4426 | * released. | |
c17ea20d TH |
4427 | */ |
4428 | qc = ata_qc_from_tag(ap, qc->tag); | |
4429 | if (qc) { | |
4430 | if (likely(!(qc->err_mask & AC_ERR_HSM))) { | |
83625006 | 4431 | ap->ops->irq_on(ap); |
c17ea20d TH |
4432 | ata_qc_complete(qc); |
4433 | } else | |
4434 | ata_port_freeze(ap); | |
4435 | } | |
4436 | ||
ba6a1308 | 4437 | spin_unlock_irqrestore(ap->lock, flags); |
c17ea20d TH |
4438 | } else { |
4439 | if (likely(!(qc->err_mask & AC_ERR_HSM))) | |
4440 | ata_qc_complete(qc); | |
4441 | else | |
4442 | ata_port_freeze(ap); | |
4443 | } | |
4444 | } else { | |
4445 | if (in_wq) { | |
ba6a1308 | 4446 | spin_lock_irqsave(ap->lock, flags); |
83625006 | 4447 | ap->ops->irq_on(ap); |
c17ea20d | 4448 | ata_qc_complete(qc); |
ba6a1308 | 4449 | spin_unlock_irqrestore(ap->lock, flags); |
c17ea20d TH |
4450 | } else |
4451 | ata_qc_complete(qc); | |
4452 | } | |
1da177e4 | 4453 | |
c81e29b4 | 4454 | ata_altstatus(ap); /* flush */ |
c17ea20d TH |
4455 | } |
4456 | ||
bb5cb290 AL |
4457 | /** |
4458 | * ata_hsm_move - move the HSM to the next state. | |
4459 | * @ap: the target ata_port | |
4460 | * @qc: qc on going | |
4461 | * @status: current device status | |
4462 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
4463 | * | |
4464 | * RETURNS: | |
4465 | * 1 when poll next status needed, 0 otherwise. | |
4466 | */ | |
9a1004d0 TH |
4467 | int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, |
4468 | u8 status, int in_wq) | |
e2cec771 | 4469 | { |
bb5cb290 AL |
4470 | unsigned long flags = 0; |
4471 | int poll_next; | |
4472 | ||
6912ccd5 AL |
4473 | WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); |
4474 | ||
bb5cb290 AL |
4475 | /* Make sure ata_qc_issue_prot() does not throw things |
4476 | * like DMA polling into the workqueue. Notice that | |
4477 | * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). | |
4478 | */ | |
c234fb00 | 4479 | WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); |
bb5cb290 | 4480 | |
e2cec771 | 4481 | fsm_start: |
999bb6f4 | 4482 | DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", |
44877b4e | 4483 | ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); |
999bb6f4 | 4484 | |
e2cec771 AL |
4485 | switch (ap->hsm_task_state) { |
4486 | case HSM_ST_FIRST: | |
bb5cb290 AL |
4487 | /* Send first data block or PACKET CDB */ |
4488 | ||
4489 | /* If polling, we will stay in the work queue after | |
4490 | * sending the data. Otherwise, interrupt handler | |
4491 | * takes over after sending the data. | |
4492 | */ | |
4493 | poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); | |
4494 | ||
e2cec771 | 4495 | /* check device status */ |
3655d1d3 AL |
4496 | if (unlikely((status & ATA_DRQ) == 0)) { |
4497 | /* handle BSY=0, DRQ=0 as error */ | |
4498 | if (likely(status & (ATA_ERR | ATA_DF))) | |
4499 | /* device stops HSM for abort/error */ | |
4500 | qc->err_mask |= AC_ERR_DEV; | |
4501 | else | |
4502 | /* HSM violation. Let EH handle this */ | |
4503 | qc->err_mask |= AC_ERR_HSM; | |
4504 | ||
14be71f4 | 4505 | ap->hsm_task_state = HSM_ST_ERR; |
e2cec771 | 4506 | goto fsm_start; |
1da177e4 LT |
4507 | } |
4508 | ||
71601958 AL |
4509 | /* Device should not ask for data transfer (DRQ=1) |
4510 | * when it finds something wrong. | |
eee6c32f AL |
4511 | * We ignore DRQ here and stop the HSM by |
4512 | * changing hsm_task_state to HSM_ST_ERR and | |
4513 | * let the EH abort the command or reset the device. | |
71601958 AL |
4514 | */ |
4515 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
44877b4e TH |
4516 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with device " |
4517 | "error, dev_stat 0x%X\n", status); | |
3655d1d3 | 4518 | qc->err_mask |= AC_ERR_HSM; |
eee6c32f AL |
4519 | ap->hsm_task_state = HSM_ST_ERR; |
4520 | goto fsm_start; | |
71601958 | 4521 | } |
1da177e4 | 4522 | |
bb5cb290 AL |
4523 | /* Send the CDB (atapi) or the first data block (ata pio out). |
4524 | * During the state transition, interrupt handler shouldn't | |
4525 | * be invoked before the data transfer is complete and | |
4526 | * hsm_task_state is changed. Hence, the following locking. | |
4527 | */ | |
4528 | if (in_wq) | |
ba6a1308 | 4529 | spin_lock_irqsave(ap->lock, flags); |
1da177e4 | 4530 | |
bb5cb290 AL |
4531 | if (qc->tf.protocol == ATA_PROT_PIO) { |
4532 | /* PIO data out protocol. | |
4533 | * send first data block. | |
4534 | */ | |
0565c26d | 4535 | |
bb5cb290 AL |
4536 | /* ata_pio_sectors() might change the state |
4537 | * to HSM_ST_LAST. so, the state is changed here | |
4538 | * before ata_pio_sectors(). | |
4539 | */ | |
4540 | ap->hsm_task_state = HSM_ST; | |
4541 | ata_pio_sectors(qc); | |
4542 | ata_altstatus(ap); /* flush */ | |
4543 | } else | |
4544 | /* send CDB */ | |
4545 | atapi_send_cdb(ap, qc); | |
4546 | ||
4547 | if (in_wq) | |
ba6a1308 | 4548 | spin_unlock_irqrestore(ap->lock, flags); |
bb5cb290 AL |
4549 | |
4550 | /* if polling, ata_pio_task() handles the rest. | |
4551 | * otherwise, interrupt handler takes over from here. | |
4552 | */ | |
e2cec771 | 4553 | break; |
1c848984 | 4554 | |
e2cec771 AL |
4555 | case HSM_ST: |
4556 | /* complete command or read/write the data register */ | |
4557 | if (qc->tf.protocol == ATA_PROT_ATAPI) { | |
4558 | /* ATAPI PIO protocol */ | |
4559 | if ((status & ATA_DRQ) == 0) { | |
3655d1d3 AL |
4560 | /* No more data to transfer or device error. |
4561 | * Device error will be tagged in HSM_ST_LAST. | |
4562 | */ | |
e2cec771 AL |
4563 | ap->hsm_task_state = HSM_ST_LAST; |
4564 | goto fsm_start; | |
4565 | } | |
1da177e4 | 4566 | |
71601958 AL |
4567 | /* Device should not ask for data transfer (DRQ=1) |
4568 | * when it finds something wrong. | |
eee6c32f AL |
4569 | * We ignore DRQ here and stop the HSM by |
4570 | * changing hsm_task_state to HSM_ST_ERR and | |
4571 | * let the EH abort the command or reset the device. | |
71601958 AL |
4572 | */ |
4573 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
44877b4e TH |
4574 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " |
4575 | "device error, dev_stat 0x%X\n", | |
4576 | status); | |
3655d1d3 | 4577 | qc->err_mask |= AC_ERR_HSM; |
eee6c32f AL |
4578 | ap->hsm_task_state = HSM_ST_ERR; |
4579 | goto fsm_start; | |
71601958 | 4580 | } |
1da177e4 | 4581 | |
e2cec771 | 4582 | atapi_pio_bytes(qc); |
7fb6ec28 | 4583 | |
e2cec771 AL |
4584 | if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) |
4585 | /* bad ireason reported by device */ | |
4586 | goto fsm_start; | |
1da177e4 | 4587 | |
e2cec771 AL |
4588 | } else { |
4589 | /* ATA PIO protocol */ | |
4590 | if (unlikely((status & ATA_DRQ) == 0)) { | |
4591 | /* handle BSY=0, DRQ=0 as error */ | |
3655d1d3 AL |
4592 | if (likely(status & (ATA_ERR | ATA_DF))) |
4593 | /* device stops HSM for abort/error */ | |
4594 | qc->err_mask |= AC_ERR_DEV; | |
4595 | else | |
55a8e2c8 TH |
4596 | /* HSM violation. Let EH handle this. |
4597 | * Phantom devices also trigger this | |
4598 | * condition. Mark hint. | |
4599 | */ | |
4600 | qc->err_mask |= AC_ERR_HSM | | |
4601 | AC_ERR_NODEV_HINT; | |
3655d1d3 | 4602 | |
e2cec771 AL |
4603 | ap->hsm_task_state = HSM_ST_ERR; |
4604 | goto fsm_start; | |
4605 | } | |
1da177e4 | 4606 | |
eee6c32f AL |
4607 | /* For PIO reads, some devices may ask for |
4608 | * data transfer (DRQ=1) alone with ERR=1. | |
4609 | * We respect DRQ here and transfer one | |
4610 | * block of junk data before changing the | |
4611 | * hsm_task_state to HSM_ST_ERR. | |
4612 | * | |
4613 | * For PIO writes, ERR=1 DRQ=1 doesn't make | |
4614 | * sense since the data block has been | |
4615 | * transferred to the device. | |
71601958 AL |
4616 | */ |
4617 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
71601958 AL |
4618 | /* data might be corrputed */ |
4619 | qc->err_mask |= AC_ERR_DEV; | |
eee6c32f AL |
4620 | |
4621 | if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { | |
4622 | ata_pio_sectors(qc); | |
4623 | ata_altstatus(ap); | |
4624 | status = ata_wait_idle(ap); | |
4625 | } | |
4626 | ||
3655d1d3 AL |
4627 | if (status & (ATA_BUSY | ATA_DRQ)) |
4628 | qc->err_mask |= AC_ERR_HSM; | |
4629 | ||
eee6c32f AL |
4630 | /* ata_pio_sectors() might change the |
4631 | * state to HSM_ST_LAST. so, the state | |
4632 | * is changed after ata_pio_sectors(). | |
4633 | */ | |
4634 | ap->hsm_task_state = HSM_ST_ERR; | |
4635 | goto fsm_start; | |
71601958 AL |
4636 | } |
4637 | ||
e2cec771 AL |
4638 | ata_pio_sectors(qc); |
4639 | ||
4640 | if (ap->hsm_task_state == HSM_ST_LAST && | |
4641 | (!(qc->tf.flags & ATA_TFLAG_WRITE))) { | |
4642 | /* all data read */ | |
4643 | ata_altstatus(ap); | |
52a32205 | 4644 | status = ata_wait_idle(ap); |
e2cec771 AL |
4645 | goto fsm_start; |
4646 | } | |
4647 | } | |
4648 | ||
4649 | ata_altstatus(ap); /* flush */ | |
bb5cb290 | 4650 | poll_next = 1; |
1da177e4 LT |
4651 | break; |
4652 | ||
14be71f4 | 4653 | case HSM_ST_LAST: |
6912ccd5 AL |
4654 | if (unlikely(!ata_ok(status))) { |
4655 | qc->err_mask |= __ac_err_mask(status); | |
e2cec771 AL |
4656 | ap->hsm_task_state = HSM_ST_ERR; |
4657 | goto fsm_start; | |
4658 | } | |
4659 | ||
4660 | /* no more data to transfer */ | |
4332a771 | 4661 | DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", |
44877b4e | 4662 | ap->print_id, qc->dev->devno, status); |
e2cec771 | 4663 | |
6912ccd5 AL |
4664 | WARN_ON(qc->err_mask); |
4665 | ||
e2cec771 | 4666 | ap->hsm_task_state = HSM_ST_IDLE; |
1da177e4 | 4667 | |
e2cec771 | 4668 | /* complete taskfile transaction */ |
c17ea20d | 4669 | ata_hsm_qc_complete(qc, in_wq); |
bb5cb290 AL |
4670 | |
4671 | poll_next = 0; | |
1da177e4 LT |
4672 | break; |
4673 | ||
14be71f4 | 4674 | case HSM_ST_ERR: |
e2cec771 AL |
4675 | /* make sure qc->err_mask is available to |
4676 | * know what's wrong and recover | |
4677 | */ | |
4678 | WARN_ON(qc->err_mask == 0); | |
4679 | ||
4680 | ap->hsm_task_state = HSM_ST_IDLE; | |
bb5cb290 | 4681 | |
999bb6f4 | 4682 | /* complete taskfile transaction */ |
c17ea20d | 4683 | ata_hsm_qc_complete(qc, in_wq); |
bb5cb290 AL |
4684 | |
4685 | poll_next = 0; | |
e2cec771 AL |
4686 | break; |
4687 | default: | |
bb5cb290 | 4688 | poll_next = 0; |
6912ccd5 | 4689 | BUG(); |
1da177e4 LT |
4690 | } |
4691 | ||
bb5cb290 | 4692 | return poll_next; |
1da177e4 LT |
4693 | } |
4694 | ||
65f27f38 | 4695 | static void ata_pio_task(struct work_struct *work) |
8061f5f0 | 4696 | { |
65f27f38 DH |
4697 | struct ata_port *ap = |
4698 | container_of(work, struct ata_port, port_task.work); | |
4699 | struct ata_queued_cmd *qc = ap->port_task_data; | |
8061f5f0 | 4700 | u8 status; |
a1af3734 | 4701 | int poll_next; |
8061f5f0 | 4702 | |
7fb6ec28 | 4703 | fsm_start: |
a1af3734 | 4704 | WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); |
8061f5f0 | 4705 | |
a1af3734 AL |
4706 | /* |
4707 | * This is purely heuristic. This is a fast path. | |
4708 | * Sometimes when we enter, BSY will be cleared in | |
4709 | * a chk-status or two. If not, the drive is probably seeking | |
4710 | * or something. Snooze for a couple msecs, then | |
4711 | * chk-status again. If still busy, queue delayed work. | |
4712 | */ | |
4713 | status = ata_busy_wait(ap, ATA_BUSY, 5); | |
4714 | if (status & ATA_BUSY) { | |
4715 | msleep(2); | |
4716 | status = ata_busy_wait(ap, ATA_BUSY, 10); | |
4717 | if (status & ATA_BUSY) { | |
31ce6dae | 4718 | ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); |
a1af3734 AL |
4719 | return; |
4720 | } | |
8061f5f0 TH |
4721 | } |
4722 | ||
a1af3734 AL |
4723 | /* move the HSM */ |
4724 | poll_next = ata_hsm_move(ap, qc, status, 1); | |
8061f5f0 | 4725 | |
a1af3734 AL |
4726 | /* another command or interrupt handler |
4727 | * may be running at this point. | |
4728 | */ | |
4729 | if (poll_next) | |
7fb6ec28 | 4730 | goto fsm_start; |
8061f5f0 TH |
4731 | } |
4732 | ||
1da177e4 LT |
4733 | /** |
4734 | * ata_qc_new - Request an available ATA command, for queueing | |
4735 | * @ap: Port associated with device @dev | |
4736 | * @dev: Device from whom we request an available command structure | |
4737 | * | |
4738 | * LOCKING: | |
0cba632b | 4739 | * None. |
1da177e4 LT |
4740 | */ |
4741 | ||
4742 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
4743 | { | |
4744 | struct ata_queued_cmd *qc = NULL; | |
4745 | unsigned int i; | |
4746 | ||
e3180499 | 4747 | /* no command while frozen */ |
b51e9e5d | 4748 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) |
e3180499 TH |
4749 | return NULL; |
4750 | ||
2ab7db1f TH |
4751 | /* the last tag is reserved for internal command. */ |
4752 | for (i = 0; i < ATA_MAX_QUEUE - 1; i++) | |
6cec4a39 | 4753 | if (!test_and_set_bit(i, &ap->qc_allocated)) { |
f69499f4 | 4754 | qc = __ata_qc_from_tag(ap, i); |
1da177e4 LT |
4755 | break; |
4756 | } | |
4757 | ||
4758 | if (qc) | |
4759 | qc->tag = i; | |
4760 | ||
4761 | return qc; | |
4762 | } | |
4763 | ||
4764 | /** | |
4765 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
1da177e4 LT |
4766 | * @dev: Device from whom we request an available command structure |
4767 | * | |
4768 | * LOCKING: | |
0cba632b | 4769 | * None. |
1da177e4 LT |
4770 | */ |
4771 | ||
3373efd8 | 4772 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) |
1da177e4 | 4773 | { |
3373efd8 | 4774 | struct ata_port *ap = dev->ap; |
1da177e4 LT |
4775 | struct ata_queued_cmd *qc; |
4776 | ||
4777 | qc = ata_qc_new(ap); | |
4778 | if (qc) { | |
1da177e4 LT |
4779 | qc->scsicmd = NULL; |
4780 | qc->ap = ap; | |
4781 | qc->dev = dev; | |
1da177e4 | 4782 | |
2c13b7ce | 4783 | ata_qc_reinit(qc); |
1da177e4 LT |
4784 | } |
4785 | ||
4786 | return qc; | |
4787 | } | |
4788 | ||
1da177e4 LT |
4789 | /** |
4790 | * ata_qc_free - free unused ata_queued_cmd | |
4791 | * @qc: Command to complete | |
4792 | * | |
4793 | * Designed to free unused ata_queued_cmd object | |
4794 | * in case something prevents using it. | |
4795 | * | |
4796 | * LOCKING: | |
cca3974e | 4797 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4798 | */ |
4799 | void ata_qc_free(struct ata_queued_cmd *qc) | |
4800 | { | |
4ba946e9 TH |
4801 | struct ata_port *ap = qc->ap; |
4802 | unsigned int tag; | |
4803 | ||
a4631474 | 4804 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
1da177e4 | 4805 | |
4ba946e9 TH |
4806 | qc->flags = 0; |
4807 | tag = qc->tag; | |
4808 | if (likely(ata_tag_valid(tag))) { | |
4ba946e9 | 4809 | qc->tag = ATA_TAG_POISON; |
6cec4a39 | 4810 | clear_bit(tag, &ap->qc_allocated); |
4ba946e9 | 4811 | } |
1da177e4 LT |
4812 | } |
4813 | ||
76014427 | 4814 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 4815 | { |
dedaf2b0 TH |
4816 | struct ata_port *ap = qc->ap; |
4817 | ||
a4631474 TH |
4818 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
4819 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
1da177e4 LT |
4820 | |
4821 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4822 | ata_sg_clean(qc); | |
4823 | ||
7401abf2 | 4824 | /* command should be marked inactive atomically with qc completion */ |
dedaf2b0 TH |
4825 | if (qc->tf.protocol == ATA_PROT_NCQ) |
4826 | ap->sactive &= ~(1 << qc->tag); | |
4827 | else | |
4828 | ap->active_tag = ATA_TAG_POISON; | |
7401abf2 | 4829 | |
3f3791d3 AL |
4830 | /* atapi: mark qc as inactive to prevent the interrupt handler |
4831 | * from completing the command twice later, before the error handler | |
4832 | * is called. (when rc != 0 and atapi request sense is needed) | |
4833 | */ | |
4834 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
dedaf2b0 | 4835 | ap->qc_active &= ~(1 << qc->tag); |
3f3791d3 | 4836 | |
1da177e4 | 4837 | /* call completion callback */ |
77853bf2 | 4838 | qc->complete_fn(qc); |
1da177e4 LT |
4839 | } |
4840 | ||
39599a53 TH |
4841 | static void fill_result_tf(struct ata_queued_cmd *qc) |
4842 | { | |
4843 | struct ata_port *ap = qc->ap; | |
4844 | ||
39599a53 | 4845 | qc->result_tf.flags = qc->tf.flags; |
4742d54f | 4846 | ap->ops->tf_read(ap, &qc->result_tf); |
39599a53 TH |
4847 | } |
4848 | ||
f686bcb8 TH |
4849 | /** |
4850 | * ata_qc_complete - Complete an active ATA command | |
4851 | * @qc: Command to complete | |
4852 | * @err_mask: ATA Status register contents | |
4853 | * | |
4854 | * Indicate to the mid and upper layers that an ATA | |
4855 | * command has completed, with either an ok or not-ok status. | |
4856 | * | |
4857 | * LOCKING: | |
cca3974e | 4858 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
4859 | */ |
4860 | void ata_qc_complete(struct ata_queued_cmd *qc) | |
4861 | { | |
4862 | struct ata_port *ap = qc->ap; | |
4863 | ||
4864 | /* XXX: New EH and old EH use different mechanisms to | |
4865 | * synchronize EH with regular execution path. | |
4866 | * | |
4867 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. | |
4868 | * Normal execution path is responsible for not accessing a | |
4869 | * failed qc. libata core enforces the rule by returning NULL | |
4870 | * from ata_qc_from_tag() for failed qcs. | |
4871 | * | |
4872 | * Old EH depends on ata_qc_complete() nullifying completion | |
4873 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does | |
4874 | * not synchronize with interrupt handler. Only PIO task is | |
4875 | * taken care of. | |
4876 | */ | |
4877 | if (ap->ops->error_handler) { | |
b51e9e5d | 4878 | WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); |
f686bcb8 TH |
4879 | |
4880 | if (unlikely(qc->err_mask)) | |
4881 | qc->flags |= ATA_QCFLAG_FAILED; | |
4882 | ||
4883 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { | |
4884 | if (!ata_tag_internal(qc->tag)) { | |
4885 | /* always fill result TF for failed qc */ | |
39599a53 | 4886 | fill_result_tf(qc); |
f686bcb8 TH |
4887 | ata_qc_schedule_eh(qc); |
4888 | return; | |
4889 | } | |
4890 | } | |
4891 | ||
4892 | /* read result TF if requested */ | |
4893 | if (qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 4894 | fill_result_tf(qc); |
f686bcb8 TH |
4895 | |
4896 | __ata_qc_complete(qc); | |
4897 | } else { | |
4898 | if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) | |
4899 | return; | |
4900 | ||
4901 | /* read result TF if failed or requested */ | |
4902 | if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 4903 | fill_result_tf(qc); |
f686bcb8 TH |
4904 | |
4905 | __ata_qc_complete(qc); | |
4906 | } | |
4907 | } | |
4908 | ||
dedaf2b0 TH |
4909 | /** |
4910 | * ata_qc_complete_multiple - Complete multiple qcs successfully | |
4911 | * @ap: port in question | |
4912 | * @qc_active: new qc_active mask | |
4913 | * @finish_qc: LLDD callback invoked before completing a qc | |
4914 | * | |
4915 | * Complete in-flight commands. This functions is meant to be | |
4916 | * called from low-level driver's interrupt routine to complete | |
4917 | * requests normally. ap->qc_active and @qc_active is compared | |
4918 | * and commands are completed accordingly. | |
4919 | * | |
4920 | * LOCKING: | |
cca3974e | 4921 | * spin_lock_irqsave(host lock) |
dedaf2b0 TH |
4922 | * |
4923 | * RETURNS: | |
4924 | * Number of completed commands on success, -errno otherwise. | |
4925 | */ | |
4926 | int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, | |
4927 | void (*finish_qc)(struct ata_queued_cmd *)) | |
4928 | { | |
4929 | int nr_done = 0; | |
4930 | u32 done_mask; | |
4931 | int i; | |
4932 | ||
4933 | done_mask = ap->qc_active ^ qc_active; | |
4934 | ||
4935 | if (unlikely(done_mask & qc_active)) { | |
4936 | ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " | |
4937 | "(%08x->%08x)\n", ap->qc_active, qc_active); | |
4938 | return -EINVAL; | |
4939 | } | |
4940 | ||
4941 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
4942 | struct ata_queued_cmd *qc; | |
4943 | ||
4944 | if (!(done_mask & (1 << i))) | |
4945 | continue; | |
4946 | ||
4947 | if ((qc = ata_qc_from_tag(ap, i))) { | |
4948 | if (finish_qc) | |
4949 | finish_qc(qc); | |
4950 | ata_qc_complete(qc); | |
4951 | nr_done++; | |
4952 | } | |
4953 | } | |
4954 | ||
4955 | return nr_done; | |
4956 | } | |
4957 | ||
1da177e4 LT |
4958 | static inline int ata_should_dma_map(struct ata_queued_cmd *qc) |
4959 | { | |
4960 | struct ata_port *ap = qc->ap; | |
4961 | ||
4962 | switch (qc->tf.protocol) { | |
3dc1d881 | 4963 | case ATA_PROT_NCQ: |
1da177e4 LT |
4964 | case ATA_PROT_DMA: |
4965 | case ATA_PROT_ATAPI_DMA: | |
4966 | return 1; | |
4967 | ||
4968 | case ATA_PROT_ATAPI: | |
4969 | case ATA_PROT_PIO: | |
1da177e4 LT |
4970 | if (ap->flags & ATA_FLAG_PIO_DMA) |
4971 | return 1; | |
4972 | ||
4973 | /* fall through */ | |
4974 | ||
4975 | default: | |
4976 | return 0; | |
4977 | } | |
4978 | ||
4979 | /* never reached */ | |
4980 | } | |
4981 | ||
4982 | /** | |
4983 | * ata_qc_issue - issue taskfile to device | |
4984 | * @qc: command to issue to device | |
4985 | * | |
4986 | * Prepare an ATA command to submission to device. | |
4987 | * This includes mapping the data into a DMA-able | |
4988 | * area, filling in the S/G table, and finally | |
4989 | * writing the taskfile to hardware, starting the command. | |
4990 | * | |
4991 | * LOCKING: | |
cca3974e | 4992 | * spin_lock_irqsave(host lock) |
1da177e4 | 4993 | */ |
8e0e694a | 4994 | void ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
4995 | { |
4996 | struct ata_port *ap = qc->ap; | |
4997 | ||
dedaf2b0 TH |
4998 | /* Make sure only one non-NCQ command is outstanding. The |
4999 | * check is skipped for old EH because it reuses active qc to | |
5000 | * request ATAPI sense. | |
5001 | */ | |
5002 | WARN_ON(ap->ops->error_handler && ata_tag_valid(ap->active_tag)); | |
5003 | ||
5004 | if (qc->tf.protocol == ATA_PROT_NCQ) { | |
5005 | WARN_ON(ap->sactive & (1 << qc->tag)); | |
5006 | ap->sactive |= 1 << qc->tag; | |
5007 | } else { | |
5008 | WARN_ON(ap->sactive); | |
5009 | ap->active_tag = qc->tag; | |
5010 | } | |
5011 | ||
e4a70e76 | 5012 | qc->flags |= ATA_QCFLAG_ACTIVE; |
dedaf2b0 | 5013 | ap->qc_active |= 1 << qc->tag; |
e4a70e76 | 5014 | |
1da177e4 LT |
5015 | if (ata_should_dma_map(qc)) { |
5016 | if (qc->flags & ATA_QCFLAG_SG) { | |
5017 | if (ata_sg_setup(qc)) | |
8e436af9 | 5018 | goto sg_err; |
1da177e4 LT |
5019 | } else if (qc->flags & ATA_QCFLAG_SINGLE) { |
5020 | if (ata_sg_setup_one(qc)) | |
8e436af9 | 5021 | goto sg_err; |
1da177e4 LT |
5022 | } |
5023 | } else { | |
5024 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
5025 | } | |
5026 | ||
5027 | ap->ops->qc_prep(qc); | |
5028 | ||
8e0e694a TH |
5029 | qc->err_mask |= ap->ops->qc_issue(qc); |
5030 | if (unlikely(qc->err_mask)) | |
5031 | goto err; | |
5032 | return; | |
1da177e4 | 5033 | |
8e436af9 TH |
5034 | sg_err: |
5035 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
8e0e694a TH |
5036 | qc->err_mask |= AC_ERR_SYSTEM; |
5037 | err: | |
5038 | ata_qc_complete(qc); | |
1da177e4 LT |
5039 | } |
5040 | ||
5041 | /** | |
5042 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner | |
5043 | * @qc: command to issue to device | |
5044 | * | |
5045 | * Using various libata functions and hooks, this function | |
5046 | * starts an ATA command. ATA commands are grouped into | |
5047 | * classes called "protocols", and issuing each type of protocol | |
5048 | * is slightly different. | |
5049 | * | |
0baab86b EF |
5050 | * May be used as the qc_issue() entry in ata_port_operations. |
5051 | * | |
1da177e4 | 5052 | * LOCKING: |
cca3974e | 5053 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
5054 | * |
5055 | * RETURNS: | |
9a3d9eb0 | 5056 | * Zero on success, AC_ERR_* mask on failure |
1da177e4 LT |
5057 | */ |
5058 | ||
9a3d9eb0 | 5059 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
1da177e4 LT |
5060 | { |
5061 | struct ata_port *ap = qc->ap; | |
5062 | ||
e50362ec AL |
5063 | /* Use polling pio if the LLD doesn't handle |
5064 | * interrupt driven pio and atapi CDB interrupt. | |
5065 | */ | |
5066 | if (ap->flags & ATA_FLAG_PIO_POLLING) { | |
5067 | switch (qc->tf.protocol) { | |
5068 | case ATA_PROT_PIO: | |
e3472cbe | 5069 | case ATA_PROT_NODATA: |
e50362ec AL |
5070 | case ATA_PROT_ATAPI: |
5071 | case ATA_PROT_ATAPI_NODATA: | |
5072 | qc->tf.flags |= ATA_TFLAG_POLLING; | |
5073 | break; | |
5074 | case ATA_PROT_ATAPI_DMA: | |
5075 | if (qc->dev->flags & ATA_DFLAG_CDB_INTR) | |
3a778275 | 5076 | /* see ata_dma_blacklisted() */ |
e50362ec AL |
5077 | BUG(); |
5078 | break; | |
5079 | default: | |
5080 | break; | |
5081 | } | |
5082 | } | |
5083 | ||
3d3cca37 TH |
5084 | /* Some controllers show flaky interrupt behavior after |
5085 | * setting xfer mode. Use polling instead. | |
5086 | */ | |
5087 | if (unlikely(qc->tf.command == ATA_CMD_SET_FEATURES && | |
5088 | qc->tf.feature == SETFEATURES_XFER) && | |
5089 | (ap->flags & ATA_FLAG_SETXFER_POLLING)) | |
5090 | qc->tf.flags |= ATA_TFLAG_POLLING; | |
5091 | ||
312f7da2 | 5092 | /* select the device */ |
1da177e4 LT |
5093 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
5094 | ||
312f7da2 | 5095 | /* start the command */ |
1da177e4 LT |
5096 | switch (qc->tf.protocol) { |
5097 | case ATA_PROT_NODATA: | |
312f7da2 AL |
5098 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
5099 | ata_qc_set_polling(qc); | |
5100 | ||
e5338254 | 5101 | ata_tf_to_host(ap, &qc->tf); |
312f7da2 AL |
5102 | ap->hsm_task_state = HSM_ST_LAST; |
5103 | ||
5104 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
31ce6dae | 5105 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
312f7da2 | 5106 | |
1da177e4 LT |
5107 | break; |
5108 | ||
5109 | case ATA_PROT_DMA: | |
587005de | 5110 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
312f7da2 | 5111 | |
1da177e4 LT |
5112 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
5113 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
5114 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
312f7da2 | 5115 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
5116 | break; |
5117 | ||
312f7da2 AL |
5118 | case ATA_PROT_PIO: |
5119 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
5120 | ata_qc_set_polling(qc); | |
1da177e4 | 5121 | |
e5338254 | 5122 | ata_tf_to_host(ap, &qc->tf); |
312f7da2 | 5123 | |
54f00389 AL |
5124 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
5125 | /* PIO data out protocol */ | |
5126 | ap->hsm_task_state = HSM_ST_FIRST; | |
31ce6dae | 5127 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
54f00389 AL |
5128 | |
5129 | /* always send first data block using | |
e27486db | 5130 | * the ata_pio_task() codepath. |
54f00389 | 5131 | */ |
312f7da2 | 5132 | } else { |
54f00389 AL |
5133 | /* PIO data in protocol */ |
5134 | ap->hsm_task_state = HSM_ST; | |
5135 | ||
5136 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
31ce6dae | 5137 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
54f00389 AL |
5138 | |
5139 | /* if polling, ata_pio_task() handles the rest. | |
5140 | * otherwise, interrupt handler takes over from here. | |
5141 | */ | |
312f7da2 AL |
5142 | } |
5143 | ||
1da177e4 LT |
5144 | break; |
5145 | ||
1da177e4 | 5146 | case ATA_PROT_ATAPI: |
1da177e4 | 5147 | case ATA_PROT_ATAPI_NODATA: |
312f7da2 AL |
5148 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
5149 | ata_qc_set_polling(qc); | |
5150 | ||
e5338254 | 5151 | ata_tf_to_host(ap, &qc->tf); |
f6ef65e6 | 5152 | |
312f7da2 AL |
5153 | ap->hsm_task_state = HSM_ST_FIRST; |
5154 | ||
5155 | /* send cdb by polling if no cdb interrupt */ | |
5156 | if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || | |
5157 | (qc->tf.flags & ATA_TFLAG_POLLING)) | |
31ce6dae | 5158 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
1da177e4 LT |
5159 | break; |
5160 | ||
5161 | case ATA_PROT_ATAPI_DMA: | |
587005de | 5162 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
312f7da2 | 5163 | |
1da177e4 LT |
5164 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
5165 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
312f7da2 AL |
5166 | ap->hsm_task_state = HSM_ST_FIRST; |
5167 | ||
5168 | /* send cdb by polling if no cdb interrupt */ | |
5169 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
31ce6dae | 5170 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
1da177e4 LT |
5171 | break; |
5172 | ||
5173 | default: | |
5174 | WARN_ON(1); | |
9a3d9eb0 | 5175 | return AC_ERR_SYSTEM; |
1da177e4 LT |
5176 | } |
5177 | ||
5178 | return 0; | |
5179 | } | |
5180 | ||
1da177e4 LT |
5181 | /** |
5182 | * ata_host_intr - Handle host interrupt for given (port, task) | |
5183 | * @ap: Port on which interrupt arrived (possibly...) | |
5184 | * @qc: Taskfile currently active in engine | |
5185 | * | |
5186 | * Handle host interrupt for given queued command. Currently, | |
5187 | * only DMA interrupts are handled. All other commands are | |
5188 | * handled via polling with interrupts disabled (nIEN bit). | |
5189 | * | |
5190 | * LOCKING: | |
cca3974e | 5191 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
5192 | * |
5193 | * RETURNS: | |
5194 | * One if interrupt was handled, zero if not (shared irq). | |
5195 | */ | |
5196 | ||
5197 | inline unsigned int ata_host_intr (struct ata_port *ap, | |
5198 | struct ata_queued_cmd *qc) | |
5199 | { | |
ea54763f | 5200 | struct ata_eh_info *ehi = &ap->eh_info; |
312f7da2 | 5201 | u8 status, host_stat = 0; |
1da177e4 | 5202 | |
312f7da2 | 5203 | VPRINTK("ata%u: protocol %d task_state %d\n", |
44877b4e | 5204 | ap->print_id, qc->tf.protocol, ap->hsm_task_state); |
1da177e4 | 5205 | |
312f7da2 AL |
5206 | /* Check whether we are expecting interrupt in this state */ |
5207 | switch (ap->hsm_task_state) { | |
5208 | case HSM_ST_FIRST: | |
6912ccd5 AL |
5209 | /* Some pre-ATAPI-4 devices assert INTRQ |
5210 | * at this state when ready to receive CDB. | |
5211 | */ | |
1da177e4 | 5212 | |
312f7da2 AL |
5213 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. |
5214 | * The flag was turned on only for atapi devices. | |
5215 | * No need to check is_atapi_taskfile(&qc->tf) again. | |
5216 | */ | |
5217 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
1da177e4 | 5218 | goto idle_irq; |
1da177e4 | 5219 | break; |
312f7da2 AL |
5220 | case HSM_ST_LAST: |
5221 | if (qc->tf.protocol == ATA_PROT_DMA || | |
5222 | qc->tf.protocol == ATA_PROT_ATAPI_DMA) { | |
5223 | /* check status of DMA engine */ | |
5224 | host_stat = ap->ops->bmdma_status(ap); | |
44877b4e TH |
5225 | VPRINTK("ata%u: host_stat 0x%X\n", |
5226 | ap->print_id, host_stat); | |
312f7da2 AL |
5227 | |
5228 | /* if it's not our irq... */ | |
5229 | if (!(host_stat & ATA_DMA_INTR)) | |
5230 | goto idle_irq; | |
5231 | ||
5232 | /* before we do anything else, clear DMA-Start bit */ | |
5233 | ap->ops->bmdma_stop(qc); | |
a4f16610 AL |
5234 | |
5235 | if (unlikely(host_stat & ATA_DMA_ERR)) { | |
5236 | /* error when transfering data to/from memory */ | |
5237 | qc->err_mask |= AC_ERR_HOST_BUS; | |
5238 | ap->hsm_task_state = HSM_ST_ERR; | |
5239 | } | |
312f7da2 AL |
5240 | } |
5241 | break; | |
5242 | case HSM_ST: | |
5243 | break; | |
1da177e4 LT |
5244 | default: |
5245 | goto idle_irq; | |
5246 | } | |
5247 | ||
312f7da2 AL |
5248 | /* check altstatus */ |
5249 | status = ata_altstatus(ap); | |
5250 | if (status & ATA_BUSY) | |
5251 | goto idle_irq; | |
1da177e4 | 5252 | |
312f7da2 AL |
5253 | /* check main status, clearing INTRQ */ |
5254 | status = ata_chk_status(ap); | |
5255 | if (unlikely(status & ATA_BUSY)) | |
5256 | goto idle_irq; | |
1da177e4 | 5257 | |
312f7da2 AL |
5258 | /* ack bmdma irq events */ |
5259 | ap->ops->irq_clear(ap); | |
1da177e4 | 5260 | |
bb5cb290 | 5261 | ata_hsm_move(ap, qc, status, 0); |
ea54763f TH |
5262 | |
5263 | if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || | |
5264 | qc->tf.protocol == ATA_PROT_ATAPI_DMA)) | |
5265 | ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); | |
5266 | ||
1da177e4 LT |
5267 | return 1; /* irq handled */ |
5268 | ||
5269 | idle_irq: | |
5270 | ap->stats.idle_irq++; | |
5271 | ||
5272 | #ifdef ATA_IRQ_TRAP | |
5273 | if ((ap->stats.idle_irq % 1000) == 0) { | |
83625006 | 5274 | ap->ops->irq_ack(ap, 0); /* debug trap */ |
f15a1daf | 5275 | ata_port_printk(ap, KERN_WARNING, "irq trap\n"); |
23cfce89 | 5276 | return 1; |
1da177e4 LT |
5277 | } |
5278 | #endif | |
5279 | return 0; /* irq not handled */ | |
5280 | } | |
5281 | ||
5282 | /** | |
5283 | * ata_interrupt - Default ATA host interrupt handler | |
0cba632b | 5284 | * @irq: irq line (unused) |
cca3974e | 5285 | * @dev_instance: pointer to our ata_host information structure |
1da177e4 | 5286 | * |
0cba632b JG |
5287 | * Default interrupt handler for PCI IDE devices. Calls |
5288 | * ata_host_intr() for each port that is not disabled. | |
5289 | * | |
1da177e4 | 5290 | * LOCKING: |
cca3974e | 5291 | * Obtains host lock during operation. |
1da177e4 LT |
5292 | * |
5293 | * RETURNS: | |
0cba632b | 5294 | * IRQ_NONE or IRQ_HANDLED. |
1da177e4 LT |
5295 | */ |
5296 | ||
7d12e780 | 5297 | irqreturn_t ata_interrupt (int irq, void *dev_instance) |
1da177e4 | 5298 | { |
cca3974e | 5299 | struct ata_host *host = dev_instance; |
1da177e4 LT |
5300 | unsigned int i; |
5301 | unsigned int handled = 0; | |
5302 | unsigned long flags; | |
5303 | ||
5304 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ | |
cca3974e | 5305 | spin_lock_irqsave(&host->lock, flags); |
1da177e4 | 5306 | |
cca3974e | 5307 | for (i = 0; i < host->n_ports; i++) { |
1da177e4 LT |
5308 | struct ata_port *ap; |
5309 | ||
cca3974e | 5310 | ap = host->ports[i]; |
c1389503 | 5311 | if (ap && |
029f5468 | 5312 | !(ap->flags & ATA_FLAG_DISABLED)) { |
1da177e4 LT |
5313 | struct ata_queued_cmd *qc; |
5314 | ||
5315 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
312f7da2 | 5316 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && |
21b1ed74 | 5317 | (qc->flags & ATA_QCFLAG_ACTIVE)) |
1da177e4 LT |
5318 | handled |= ata_host_intr(ap, qc); |
5319 | } | |
5320 | } | |
5321 | ||
cca3974e | 5322 | spin_unlock_irqrestore(&host->lock, flags); |
1da177e4 LT |
5323 | |
5324 | return IRQ_RETVAL(handled); | |
5325 | } | |
5326 | ||
34bf2170 TH |
5327 | /** |
5328 | * sata_scr_valid - test whether SCRs are accessible | |
5329 | * @ap: ATA port to test SCR accessibility for | |
5330 | * | |
5331 | * Test whether SCRs are accessible for @ap. | |
5332 | * | |
5333 | * LOCKING: | |
5334 | * None. | |
5335 | * | |
5336 | * RETURNS: | |
5337 | * 1 if SCRs are accessible, 0 otherwise. | |
5338 | */ | |
5339 | int sata_scr_valid(struct ata_port *ap) | |
5340 | { | |
5341 | return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read; | |
5342 | } | |
5343 | ||
5344 | /** | |
5345 | * sata_scr_read - read SCR register of the specified port | |
5346 | * @ap: ATA port to read SCR for | |
5347 | * @reg: SCR to read | |
5348 | * @val: Place to store read value | |
5349 | * | |
5350 | * Read SCR register @reg of @ap into *@val. This function is | |
5351 | * guaranteed to succeed if the cable type of the port is SATA | |
5352 | * and the port implements ->scr_read. | |
5353 | * | |
5354 | * LOCKING: | |
5355 | * None. | |
5356 | * | |
5357 | * RETURNS: | |
5358 | * 0 on success, negative errno on failure. | |
5359 | */ | |
5360 | int sata_scr_read(struct ata_port *ap, int reg, u32 *val) | |
5361 | { | |
5362 | if (sata_scr_valid(ap)) { | |
5363 | *val = ap->ops->scr_read(ap, reg); | |
5364 | return 0; | |
5365 | } | |
5366 | return -EOPNOTSUPP; | |
5367 | } | |
5368 | ||
5369 | /** | |
5370 | * sata_scr_write - write SCR register of the specified port | |
5371 | * @ap: ATA port to write SCR for | |
5372 | * @reg: SCR to write | |
5373 | * @val: value to write | |
5374 | * | |
5375 | * Write @val to SCR register @reg of @ap. This function is | |
5376 | * guaranteed to succeed if the cable type of the port is SATA | |
5377 | * and the port implements ->scr_read. | |
5378 | * | |
5379 | * LOCKING: | |
5380 | * None. | |
5381 | * | |
5382 | * RETURNS: | |
5383 | * 0 on success, negative errno on failure. | |
5384 | */ | |
5385 | int sata_scr_write(struct ata_port *ap, int reg, u32 val) | |
5386 | { | |
5387 | if (sata_scr_valid(ap)) { | |
5388 | ap->ops->scr_write(ap, reg, val); | |
5389 | return 0; | |
5390 | } | |
5391 | return -EOPNOTSUPP; | |
5392 | } | |
5393 | ||
5394 | /** | |
5395 | * sata_scr_write_flush - write SCR register of the specified port and flush | |
5396 | * @ap: ATA port to write SCR for | |
5397 | * @reg: SCR to write | |
5398 | * @val: value to write | |
5399 | * | |
5400 | * This function is identical to sata_scr_write() except that this | |
5401 | * function performs flush after writing to the register. | |
5402 | * | |
5403 | * LOCKING: | |
5404 | * None. | |
5405 | * | |
5406 | * RETURNS: | |
5407 | * 0 on success, negative errno on failure. | |
5408 | */ | |
5409 | int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val) | |
5410 | { | |
5411 | if (sata_scr_valid(ap)) { | |
5412 | ap->ops->scr_write(ap, reg, val); | |
5413 | ap->ops->scr_read(ap, reg); | |
5414 | return 0; | |
5415 | } | |
5416 | return -EOPNOTSUPP; | |
5417 | } | |
5418 | ||
5419 | /** | |
5420 | * ata_port_online - test whether the given port is online | |
5421 | * @ap: ATA port to test | |
5422 | * | |
5423 | * Test whether @ap is online. Note that this function returns 0 | |
5424 | * if online status of @ap cannot be obtained, so | |
5425 | * ata_port_online(ap) != !ata_port_offline(ap). | |
5426 | * | |
5427 | * LOCKING: | |
5428 | * None. | |
5429 | * | |
5430 | * RETURNS: | |
5431 | * 1 if the port online status is available and online. | |
5432 | */ | |
5433 | int ata_port_online(struct ata_port *ap) | |
5434 | { | |
5435 | u32 sstatus; | |
5436 | ||
5437 | if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3) | |
5438 | return 1; | |
5439 | return 0; | |
5440 | } | |
5441 | ||
5442 | /** | |
5443 | * ata_port_offline - test whether the given port is offline | |
5444 | * @ap: ATA port to test | |
5445 | * | |
5446 | * Test whether @ap is offline. Note that this function returns | |
5447 | * 0 if offline status of @ap cannot be obtained, so | |
5448 | * ata_port_online(ap) != !ata_port_offline(ap). | |
5449 | * | |
5450 | * LOCKING: | |
5451 | * None. | |
5452 | * | |
5453 | * RETURNS: | |
5454 | * 1 if the port offline status is available and offline. | |
5455 | */ | |
5456 | int ata_port_offline(struct ata_port *ap) | |
5457 | { | |
5458 | u32 sstatus; | |
5459 | ||
5460 | if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3) | |
5461 | return 1; | |
5462 | return 0; | |
5463 | } | |
0baab86b | 5464 | |
77b08fb5 | 5465 | int ata_flush_cache(struct ata_device *dev) |
9b847548 | 5466 | { |
977e6b9f | 5467 | unsigned int err_mask; |
9b847548 JA |
5468 | u8 cmd; |
5469 | ||
5470 | if (!ata_try_flush_cache(dev)) | |
5471 | return 0; | |
5472 | ||
6fc49adb | 5473 | if (dev->flags & ATA_DFLAG_FLUSH_EXT) |
9b847548 JA |
5474 | cmd = ATA_CMD_FLUSH_EXT; |
5475 | else | |
5476 | cmd = ATA_CMD_FLUSH; | |
5477 | ||
977e6b9f TH |
5478 | err_mask = ata_do_simple_cmd(dev, cmd); |
5479 | if (err_mask) { | |
5480 | ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); | |
5481 | return -EIO; | |
5482 | } | |
5483 | ||
5484 | return 0; | |
9b847548 JA |
5485 | } |
5486 | ||
6ffa01d8 | 5487 | #ifdef CONFIG_PM |
cca3974e JG |
5488 | static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, |
5489 | unsigned int action, unsigned int ehi_flags, | |
5490 | int wait) | |
500530f6 TH |
5491 | { |
5492 | unsigned long flags; | |
5493 | int i, rc; | |
5494 | ||
cca3974e JG |
5495 | for (i = 0; i < host->n_ports; i++) { |
5496 | struct ata_port *ap = host->ports[i]; | |
500530f6 TH |
5497 | |
5498 | /* Previous resume operation might still be in | |
5499 | * progress. Wait for PM_PENDING to clear. | |
5500 | */ | |
5501 | if (ap->pflags & ATA_PFLAG_PM_PENDING) { | |
5502 | ata_port_wait_eh(ap); | |
5503 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
5504 | } | |
5505 | ||
5506 | /* request PM ops to EH */ | |
5507 | spin_lock_irqsave(ap->lock, flags); | |
5508 | ||
5509 | ap->pm_mesg = mesg; | |
5510 | if (wait) { | |
5511 | rc = 0; | |
5512 | ap->pm_result = &rc; | |
5513 | } | |
5514 | ||
5515 | ap->pflags |= ATA_PFLAG_PM_PENDING; | |
5516 | ap->eh_info.action |= action; | |
5517 | ap->eh_info.flags |= ehi_flags; | |
5518 | ||
5519 | ata_port_schedule_eh(ap); | |
5520 | ||
5521 | spin_unlock_irqrestore(ap->lock, flags); | |
5522 | ||
5523 | /* wait and check result */ | |
5524 | if (wait) { | |
5525 | ata_port_wait_eh(ap); | |
5526 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
5527 | if (rc) | |
5528 | return rc; | |
5529 | } | |
5530 | } | |
5531 | ||
5532 | return 0; | |
5533 | } | |
5534 | ||
5535 | /** | |
cca3974e JG |
5536 | * ata_host_suspend - suspend host |
5537 | * @host: host to suspend | |
500530f6 TH |
5538 | * @mesg: PM message |
5539 | * | |
cca3974e | 5540 | * Suspend @host. Actual operation is performed by EH. This |
500530f6 TH |
5541 | * function requests EH to perform PM operations and waits for EH |
5542 | * to finish. | |
5543 | * | |
5544 | * LOCKING: | |
5545 | * Kernel thread context (may sleep). | |
5546 | * | |
5547 | * RETURNS: | |
5548 | * 0 on success, -errno on failure. | |
5549 | */ | |
cca3974e | 5550 | int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
500530f6 TH |
5551 | { |
5552 | int i, j, rc; | |
5553 | ||
cca3974e | 5554 | rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); |
500530f6 TH |
5555 | if (rc) |
5556 | goto fail; | |
5557 | ||
5558 | /* EH is quiescent now. Fail if we have any ready device. | |
5559 | * This happens if hotplug occurs between completion of device | |
5560 | * suspension and here. | |
5561 | */ | |
cca3974e JG |
5562 | for (i = 0; i < host->n_ports; i++) { |
5563 | struct ata_port *ap = host->ports[i]; | |
500530f6 TH |
5564 | |
5565 | for (j = 0; j < ATA_MAX_DEVICES; j++) { | |
5566 | struct ata_device *dev = &ap->device[j]; | |
5567 | ||
5568 | if (ata_dev_ready(dev)) { | |
5569 | ata_port_printk(ap, KERN_WARNING, | |
5570 | "suspend failed, device %d " | |
5571 | "still active\n", dev->devno); | |
5572 | rc = -EBUSY; | |
5573 | goto fail; | |
5574 | } | |
5575 | } | |
5576 | } | |
5577 | ||
cca3974e | 5578 | host->dev->power.power_state = mesg; |
500530f6 TH |
5579 | return 0; |
5580 | ||
5581 | fail: | |
cca3974e | 5582 | ata_host_resume(host); |
500530f6 TH |
5583 | return rc; |
5584 | } | |
5585 | ||
5586 | /** | |
cca3974e JG |
5587 | * ata_host_resume - resume host |
5588 | * @host: host to resume | |
500530f6 | 5589 | * |
cca3974e | 5590 | * Resume @host. Actual operation is performed by EH. This |
500530f6 TH |
5591 | * function requests EH to perform PM operations and returns. |
5592 | * Note that all resume operations are performed parallely. | |
5593 | * | |
5594 | * LOCKING: | |
5595 | * Kernel thread context (may sleep). | |
5596 | */ | |
cca3974e | 5597 | void ata_host_resume(struct ata_host *host) |
500530f6 | 5598 | { |
cca3974e JG |
5599 | ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, |
5600 | ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); | |
5601 | host->dev->power.power_state = PMSG_ON; | |
500530f6 | 5602 | } |
6ffa01d8 | 5603 | #endif |
500530f6 | 5604 | |
c893a3ae RD |
5605 | /** |
5606 | * ata_port_start - Set port up for dma. | |
5607 | * @ap: Port to initialize | |
5608 | * | |
5609 | * Called just after data structures for each port are | |
5610 | * initialized. Allocates space for PRD table. | |
5611 | * | |
5612 | * May be used as the port_start() entry in ata_port_operations. | |
5613 | * | |
5614 | * LOCKING: | |
5615 | * Inherited from caller. | |
5616 | */ | |
f0d36efd | 5617 | int ata_port_start(struct ata_port *ap) |
1da177e4 | 5618 | { |
2f1f610b | 5619 | struct device *dev = ap->dev; |
6037d6bb | 5620 | int rc; |
1da177e4 | 5621 | |
f0d36efd TH |
5622 | ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, |
5623 | GFP_KERNEL); | |
1da177e4 LT |
5624 | if (!ap->prd) |
5625 | return -ENOMEM; | |
5626 | ||
6037d6bb | 5627 | rc = ata_pad_alloc(ap, dev); |
f0d36efd | 5628 | if (rc) |
6037d6bb | 5629 | return rc; |
1da177e4 | 5630 | |
f0d36efd TH |
5631 | DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, |
5632 | (unsigned long long)ap->prd_dma); | |
1da177e4 LT |
5633 | return 0; |
5634 | } | |
5635 | ||
3ef3b43d TH |
5636 | /** |
5637 | * ata_dev_init - Initialize an ata_device structure | |
5638 | * @dev: Device structure to initialize | |
5639 | * | |
5640 | * Initialize @dev in preparation for probing. | |
5641 | * | |
5642 | * LOCKING: | |
5643 | * Inherited from caller. | |
5644 | */ | |
5645 | void ata_dev_init(struct ata_device *dev) | |
5646 | { | |
5647 | struct ata_port *ap = dev->ap; | |
72fa4b74 TH |
5648 | unsigned long flags; |
5649 | ||
5a04bf4b TH |
5650 | /* SATA spd limit is bound to the first device */ |
5651 | ap->sata_spd_limit = ap->hw_sata_spd_limit; | |
5652 | ||
72fa4b74 TH |
5653 | /* High bits of dev->flags are used to record warm plug |
5654 | * requests which occur asynchronously. Synchronize using | |
cca3974e | 5655 | * host lock. |
72fa4b74 | 5656 | */ |
ba6a1308 | 5657 | spin_lock_irqsave(ap->lock, flags); |
72fa4b74 | 5658 | dev->flags &= ~ATA_DFLAG_INIT_MASK; |
ba6a1308 | 5659 | spin_unlock_irqrestore(ap->lock, flags); |
3ef3b43d | 5660 | |
72fa4b74 TH |
5661 | memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, |
5662 | sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); | |
3ef3b43d TH |
5663 | dev->pio_mask = UINT_MAX; |
5664 | dev->mwdma_mask = UINT_MAX; | |
5665 | dev->udma_mask = UINT_MAX; | |
5666 | } | |
5667 | ||
1da177e4 | 5668 | /** |
f3187195 TH |
5669 | * ata_port_alloc - allocate and initialize basic ATA port resources |
5670 | * @host: ATA host this allocated port belongs to | |
1da177e4 | 5671 | * |
f3187195 TH |
5672 | * Allocate and initialize basic ATA port resources. |
5673 | * | |
5674 | * RETURNS: | |
5675 | * Allocate ATA port on success, NULL on failure. | |
0cba632b | 5676 | * |
1da177e4 | 5677 | * LOCKING: |
f3187195 | 5678 | * Inherited from calling layer (may sleep). |
1da177e4 | 5679 | */ |
f3187195 | 5680 | struct ata_port *ata_port_alloc(struct ata_host *host) |
1da177e4 | 5681 | { |
f3187195 | 5682 | struct ata_port *ap; |
1da177e4 LT |
5683 | unsigned int i; |
5684 | ||
f3187195 TH |
5685 | DPRINTK("ENTER\n"); |
5686 | ||
5687 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); | |
5688 | if (!ap) | |
5689 | return NULL; | |
5690 | ||
cca3974e | 5691 | ap->lock = &host->lock; |
198e0fed | 5692 | ap->flags = ATA_FLAG_DISABLED; |
f3187195 | 5693 | ap->print_id = -1; |
1da177e4 | 5694 | ap->ctl = ATA_DEVCTL_OBS; |
cca3974e | 5695 | ap->host = host; |
f3187195 TH |
5696 | ap->dev = host->dev; |
5697 | ||
5a04bf4b | 5698 | ap->hw_sata_spd_limit = UINT_MAX; |
1da177e4 LT |
5699 | ap->active_tag = ATA_TAG_POISON; |
5700 | ap->last_ctl = 0xFF; | |
bd5d825c BP |
5701 | |
5702 | #if defined(ATA_VERBOSE_DEBUG) | |
5703 | /* turn on all debugging levels */ | |
5704 | ap->msg_enable = 0x00FF; | |
5705 | #elif defined(ATA_DEBUG) | |
5706 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; | |
88574551 | 5707 | #else |
0dd4b21f | 5708 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
bd5d825c | 5709 | #endif |
1da177e4 | 5710 | |
65f27f38 DH |
5711 | INIT_DELAYED_WORK(&ap->port_task, NULL); |
5712 | INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); | |
5713 | INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); | |
a72ec4ce | 5714 | INIT_LIST_HEAD(&ap->eh_done_q); |
c6cf9e99 | 5715 | init_waitqueue_head(&ap->eh_wait_q); |
1da177e4 | 5716 | |
838df628 | 5717 | ap->cbl = ATA_CBL_NONE; |
838df628 | 5718 | |
acf356b1 TH |
5719 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
5720 | struct ata_device *dev = &ap->device[i]; | |
38d87234 | 5721 | dev->ap = ap; |
72fa4b74 | 5722 | dev->devno = i; |
3ef3b43d | 5723 | ata_dev_init(dev); |
acf356b1 | 5724 | } |
1da177e4 LT |
5725 | |
5726 | #ifdef ATA_IRQ_TRAP | |
5727 | ap->stats.unhandled_irq = 1; | |
5728 | ap->stats.idle_irq = 1; | |
5729 | #endif | |
1da177e4 | 5730 | return ap; |
1da177e4 LT |
5731 | } |
5732 | ||
f0d36efd TH |
5733 | static void ata_host_release(struct device *gendev, void *res) |
5734 | { | |
5735 | struct ata_host *host = dev_get_drvdata(gendev); | |
5736 | int i; | |
5737 | ||
5738 | for (i = 0; i < host->n_ports; i++) { | |
5739 | struct ata_port *ap = host->ports[i]; | |
5740 | ||
ecef7253 TH |
5741 | if (!ap) |
5742 | continue; | |
5743 | ||
5744 | if ((host->flags & ATA_HOST_STARTED) && ap->ops->port_stop) | |
f0d36efd | 5745 | ap->ops->port_stop(ap); |
f0d36efd TH |
5746 | } |
5747 | ||
ecef7253 | 5748 | if ((host->flags & ATA_HOST_STARTED) && host->ops->host_stop) |
f0d36efd | 5749 | host->ops->host_stop(host); |
1aa56cca | 5750 | |
1aa506e4 TH |
5751 | for (i = 0; i < host->n_ports; i++) { |
5752 | struct ata_port *ap = host->ports[i]; | |
5753 | ||
4911487a TH |
5754 | if (!ap) |
5755 | continue; | |
5756 | ||
5757 | if (ap->scsi_host) | |
1aa506e4 TH |
5758 | scsi_host_put(ap->scsi_host); |
5759 | ||
4911487a | 5760 | kfree(ap); |
1aa506e4 TH |
5761 | host->ports[i] = NULL; |
5762 | } | |
5763 | ||
1aa56cca | 5764 | dev_set_drvdata(gendev, NULL); |
f0d36efd TH |
5765 | } |
5766 | ||
f3187195 TH |
5767 | /** |
5768 | * ata_host_alloc - allocate and init basic ATA host resources | |
5769 | * @dev: generic device this host is associated with | |
5770 | * @max_ports: maximum number of ATA ports associated with this host | |
5771 | * | |
5772 | * Allocate and initialize basic ATA host resources. LLD calls | |
5773 | * this function to allocate a host, initializes it fully and | |
5774 | * attaches it using ata_host_register(). | |
5775 | * | |
5776 | * @max_ports ports are allocated and host->n_ports is | |
5777 | * initialized to @max_ports. The caller is allowed to decrease | |
5778 | * host->n_ports before calling ata_host_register(). The unused | |
5779 | * ports will be automatically freed on registration. | |
5780 | * | |
5781 | * RETURNS: | |
5782 | * Allocate ATA host on success, NULL on failure. | |
5783 | * | |
5784 | * LOCKING: | |
5785 | * Inherited from calling layer (may sleep). | |
5786 | */ | |
5787 | struct ata_host *ata_host_alloc(struct device *dev, int max_ports) | |
5788 | { | |
5789 | struct ata_host *host; | |
5790 | size_t sz; | |
5791 | int i; | |
5792 | ||
5793 | DPRINTK("ENTER\n"); | |
5794 | ||
5795 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) | |
5796 | return NULL; | |
5797 | ||
5798 | /* alloc a container for our list of ATA ports (buses) */ | |
5799 | sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); | |
5800 | /* alloc a container for our list of ATA ports (buses) */ | |
5801 | host = devres_alloc(ata_host_release, sz, GFP_KERNEL); | |
5802 | if (!host) | |
5803 | goto err_out; | |
5804 | ||
5805 | devres_add(dev, host); | |
5806 | dev_set_drvdata(dev, host); | |
5807 | ||
5808 | spin_lock_init(&host->lock); | |
5809 | host->dev = dev; | |
5810 | host->n_ports = max_ports; | |
5811 | ||
5812 | /* allocate ports bound to this host */ | |
5813 | for (i = 0; i < max_ports; i++) { | |
5814 | struct ata_port *ap; | |
5815 | ||
5816 | ap = ata_port_alloc(host); | |
5817 | if (!ap) | |
5818 | goto err_out; | |
5819 | ||
5820 | ap->port_no = i; | |
5821 | host->ports[i] = ap; | |
5822 | } | |
5823 | ||
5824 | devres_remove_group(dev, NULL); | |
5825 | return host; | |
5826 | ||
5827 | err_out: | |
5828 | devres_release_group(dev, NULL); | |
5829 | return NULL; | |
5830 | } | |
5831 | ||
f5cda257 TH |
5832 | /** |
5833 | * ata_host_alloc_pinfo - alloc host and init with port_info array | |
5834 | * @dev: generic device this host is associated with | |
5835 | * @ppi: array of ATA port_info to initialize host with | |
5836 | * @n_ports: number of ATA ports attached to this host | |
5837 | * | |
5838 | * Allocate ATA host and initialize with info from @ppi. If NULL | |
5839 | * terminated, @ppi may contain fewer entries than @n_ports. The | |
5840 | * last entry will be used for the remaining ports. | |
5841 | * | |
5842 | * RETURNS: | |
5843 | * Allocate ATA host on success, NULL on failure. | |
5844 | * | |
5845 | * LOCKING: | |
5846 | * Inherited from calling layer (may sleep). | |
5847 | */ | |
5848 | struct ata_host *ata_host_alloc_pinfo(struct device *dev, | |
5849 | const struct ata_port_info * const * ppi, | |
5850 | int n_ports) | |
5851 | { | |
5852 | const struct ata_port_info *pi; | |
5853 | struct ata_host *host; | |
5854 | int i, j; | |
5855 | ||
5856 | host = ata_host_alloc(dev, n_ports); | |
5857 | if (!host) | |
5858 | return NULL; | |
5859 | ||
5860 | for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { | |
5861 | struct ata_port *ap = host->ports[i]; | |
5862 | ||
5863 | if (ppi[j]) | |
5864 | pi = ppi[j++]; | |
5865 | ||
5866 | ap->pio_mask = pi->pio_mask; | |
5867 | ap->mwdma_mask = pi->mwdma_mask; | |
5868 | ap->udma_mask = pi->udma_mask; | |
5869 | ap->flags |= pi->flags; | |
5870 | ap->ops = pi->port_ops; | |
5871 | ||
5872 | if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) | |
5873 | host->ops = pi->port_ops; | |
5874 | if (!host->private_data && pi->private_data) | |
5875 | host->private_data = pi->private_data; | |
5876 | } | |
5877 | ||
5878 | return host; | |
5879 | } | |
5880 | ||
ecef7253 TH |
5881 | /** |
5882 | * ata_host_start - start and freeze ports of an ATA host | |
5883 | * @host: ATA host to start ports for | |
5884 | * | |
5885 | * Start and then freeze ports of @host. Started status is | |
5886 | * recorded in host->flags, so this function can be called | |
5887 | * multiple times. Ports are guaranteed to get started only | |
f3187195 TH |
5888 | * once. If host->ops isn't initialized yet, its set to the |
5889 | * first non-dummy port ops. | |
ecef7253 TH |
5890 | * |
5891 | * LOCKING: | |
5892 | * Inherited from calling layer (may sleep). | |
5893 | * | |
5894 | * RETURNS: | |
5895 | * 0 if all ports are started successfully, -errno otherwise. | |
5896 | */ | |
5897 | int ata_host_start(struct ata_host *host) | |
5898 | { | |
5899 | int i, rc; | |
5900 | ||
5901 | if (host->flags & ATA_HOST_STARTED) | |
5902 | return 0; | |
5903 | ||
5904 | for (i = 0; i < host->n_ports; i++) { | |
5905 | struct ata_port *ap = host->ports[i]; | |
5906 | ||
f3187195 TH |
5907 | if (!host->ops && !ata_port_is_dummy(ap)) |
5908 | host->ops = ap->ops; | |
5909 | ||
ecef7253 TH |
5910 | if (ap->ops->port_start) { |
5911 | rc = ap->ops->port_start(ap); | |
5912 | if (rc) { | |
5913 | ata_port_printk(ap, KERN_ERR, "failed to " | |
5914 | "start port (errno=%d)\n", rc); | |
5915 | goto err_out; | |
5916 | } | |
5917 | } | |
5918 | ||
5919 | ata_eh_freeze_port(ap); | |
5920 | } | |
5921 | ||
5922 | host->flags |= ATA_HOST_STARTED; | |
5923 | return 0; | |
5924 | ||
5925 | err_out: | |
5926 | while (--i >= 0) { | |
5927 | struct ata_port *ap = host->ports[i]; | |
5928 | ||
5929 | if (ap->ops->port_stop) | |
5930 | ap->ops->port_stop(ap); | |
5931 | } | |
5932 | return rc; | |
5933 | } | |
5934 | ||
b03732f0 | 5935 | /** |
cca3974e JG |
5936 | * ata_sas_host_init - Initialize a host struct |
5937 | * @host: host to initialize | |
5938 | * @dev: device host is attached to | |
5939 | * @flags: host flags | |
5940 | * @ops: port_ops | |
b03732f0 BK |
5941 | * |
5942 | * LOCKING: | |
5943 | * PCI/etc. bus probe sem. | |
5944 | * | |
5945 | */ | |
f3187195 | 5946 | /* KILLME - the only user left is ipr */ |
cca3974e JG |
5947 | void ata_host_init(struct ata_host *host, struct device *dev, |
5948 | unsigned long flags, const struct ata_port_operations *ops) | |
b03732f0 | 5949 | { |
cca3974e JG |
5950 | spin_lock_init(&host->lock); |
5951 | host->dev = dev; | |
5952 | host->flags = flags; | |
5953 | host->ops = ops; | |
b03732f0 BK |
5954 | } |
5955 | ||
f3187195 TH |
5956 | /** |
5957 | * ata_host_register - register initialized ATA host | |
5958 | * @host: ATA host to register | |
5959 | * @sht: template for SCSI host | |
5960 | * | |
5961 | * Register initialized ATA host. @host is allocated using | |
5962 | * ata_host_alloc() and fully initialized by LLD. This function | |
5963 | * starts ports, registers @host with ATA and SCSI layers and | |
5964 | * probe registered devices. | |
5965 | * | |
5966 | * LOCKING: | |
5967 | * Inherited from calling layer (may sleep). | |
5968 | * | |
5969 | * RETURNS: | |
5970 | * 0 on success, -errno otherwise. | |
5971 | */ | |
5972 | int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) | |
5973 | { | |
5974 | int i, rc; | |
5975 | ||
5976 | /* host must have been started */ | |
5977 | if (!(host->flags & ATA_HOST_STARTED)) { | |
5978 | dev_printk(KERN_ERR, host->dev, | |
5979 | "BUG: trying to register unstarted host\n"); | |
5980 | WARN_ON(1); | |
5981 | return -EINVAL; | |
5982 | } | |
5983 | ||
5984 | /* Blow away unused ports. This happens when LLD can't | |
5985 | * determine the exact number of ports to allocate at | |
5986 | * allocation time. | |
5987 | */ | |
5988 | for (i = host->n_ports; host->ports[i]; i++) | |
5989 | kfree(host->ports[i]); | |
5990 | ||
5991 | /* give ports names and add SCSI hosts */ | |
5992 | for (i = 0; i < host->n_ports; i++) | |
5993 | host->ports[i]->print_id = ata_print_id++; | |
5994 | ||
5995 | rc = ata_scsi_add_hosts(host, sht); | |
5996 | if (rc) | |
5997 | return rc; | |
5998 | ||
5999 | /* set cable, sata_spd_limit and report */ | |
6000 | for (i = 0; i < host->n_ports; i++) { | |
6001 | struct ata_port *ap = host->ports[i]; | |
6002 | int irq_line; | |
6003 | u32 scontrol; | |
6004 | unsigned long xfer_mask; | |
6005 | ||
6006 | /* set SATA cable type if still unset */ | |
6007 | if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) | |
6008 | ap->cbl = ATA_CBL_SATA; | |
6009 | ||
6010 | /* init sata_spd_limit to the current value */ | |
6011 | if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) { | |
6012 | int spd = (scontrol >> 4) & 0xf; | |
6013 | ap->hw_sata_spd_limit &= (1 << spd) - 1; | |
6014 | } | |
6015 | ap->sata_spd_limit = ap->hw_sata_spd_limit; | |
6016 | ||
6017 | /* report the secondary IRQ for second channel legacy */ | |
6018 | irq_line = host->irq; | |
6019 | if (i == 1 && host->irq2) | |
6020 | irq_line = host->irq2; | |
6021 | ||
6022 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, | |
6023 | ap->udma_mask); | |
6024 | ||
6025 | /* print per-port info to dmesg */ | |
6026 | if (!ata_port_is_dummy(ap)) | |
6027 | ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%p " | |
6028 | "ctl 0x%p bmdma 0x%p irq %d\n", | |
6029 | ap->cbl == ATA_CBL_SATA ? 'S' : 'P', | |
6030 | ata_mode_string(xfer_mask), | |
6031 | ap->ioaddr.cmd_addr, | |
6032 | ap->ioaddr.ctl_addr, | |
6033 | ap->ioaddr.bmdma_addr, | |
6034 | irq_line); | |
6035 | else | |
6036 | ata_port_printk(ap, KERN_INFO, "DUMMY\n"); | |
6037 | } | |
6038 | ||
6039 | /* perform each probe synchronously */ | |
6040 | DPRINTK("probe begin\n"); | |
6041 | for (i = 0; i < host->n_ports; i++) { | |
6042 | struct ata_port *ap = host->ports[i]; | |
6043 | int rc; | |
6044 | ||
6045 | /* probe */ | |
6046 | if (ap->ops->error_handler) { | |
6047 | struct ata_eh_info *ehi = &ap->eh_info; | |
6048 | unsigned long flags; | |
6049 | ||
6050 | ata_port_probe(ap); | |
6051 | ||
6052 | /* kick EH for boot probing */ | |
6053 | spin_lock_irqsave(ap->lock, flags); | |
6054 | ||
6055 | ehi->probe_mask = (1 << ATA_MAX_DEVICES) - 1; | |
6056 | ehi->action |= ATA_EH_SOFTRESET; | |
6057 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; | |
6058 | ||
6059 | ap->pflags |= ATA_PFLAG_LOADING; | |
6060 | ata_port_schedule_eh(ap); | |
6061 | ||
6062 | spin_unlock_irqrestore(ap->lock, flags); | |
6063 | ||
6064 | /* wait for EH to finish */ | |
6065 | ata_port_wait_eh(ap); | |
6066 | } else { | |
6067 | DPRINTK("ata%u: bus probe begin\n", ap->print_id); | |
6068 | rc = ata_bus_probe(ap); | |
6069 | DPRINTK("ata%u: bus probe end\n", ap->print_id); | |
6070 | ||
6071 | if (rc) { | |
6072 | /* FIXME: do something useful here? | |
6073 | * Current libata behavior will | |
6074 | * tear down everything when | |
6075 | * the module is removed | |
6076 | * or the h/w is unplugged. | |
6077 | */ | |
6078 | } | |
6079 | } | |
6080 | } | |
6081 | ||
6082 | /* probes are done, now scan each port's disk(s) */ | |
6083 | DPRINTK("host probe begin\n"); | |
6084 | for (i = 0; i < host->n_ports; i++) { | |
6085 | struct ata_port *ap = host->ports[i]; | |
6086 | ||
6087 | ata_scsi_scan_host(ap); | |
6088 | } | |
6089 | ||
6090 | return 0; | |
6091 | } | |
6092 | ||
f5cda257 TH |
6093 | /** |
6094 | * ata_host_activate - start host, request IRQ and register it | |
6095 | * @host: target ATA host | |
6096 | * @irq: IRQ to request | |
6097 | * @irq_handler: irq_handler used when requesting IRQ | |
6098 | * @irq_flags: irq_flags used when requesting IRQ | |
6099 | * @sht: scsi_host_template to use when registering the host | |
6100 | * | |
6101 | * After allocating an ATA host and initializing it, most libata | |
6102 | * LLDs perform three steps to activate the host - start host, | |
6103 | * request IRQ and register it. This helper takes necessasry | |
6104 | * arguments and performs the three steps in one go. | |
6105 | * | |
6106 | * LOCKING: | |
6107 | * Inherited from calling layer (may sleep). | |
6108 | * | |
6109 | * RETURNS: | |
6110 | * 0 on success, -errno otherwise. | |
6111 | */ | |
6112 | int ata_host_activate(struct ata_host *host, int irq, | |
6113 | irq_handler_t irq_handler, unsigned long irq_flags, | |
6114 | struct scsi_host_template *sht) | |
6115 | { | |
6116 | int rc; | |
6117 | ||
6118 | rc = ata_host_start(host); | |
6119 | if (rc) | |
6120 | return rc; | |
6121 | ||
6122 | rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, | |
6123 | dev_driver_string(host->dev), host); | |
6124 | if (rc) | |
6125 | return rc; | |
6126 | ||
6127 | rc = ata_host_register(host, sht); | |
6128 | /* if failed, just free the IRQ and leave ports alone */ | |
6129 | if (rc) | |
6130 | devm_free_irq(host->dev, irq, host); | |
6131 | ||
6132 | return rc; | |
6133 | } | |
6134 | ||
720ba126 TH |
6135 | /** |
6136 | * ata_port_detach - Detach ATA port in prepration of device removal | |
6137 | * @ap: ATA port to be detached | |
6138 | * | |
6139 | * Detach all ATA devices and the associated SCSI devices of @ap; | |
6140 | * then, remove the associated SCSI host. @ap is guaranteed to | |
6141 | * be quiescent on return from this function. | |
6142 | * | |
6143 | * LOCKING: | |
6144 | * Kernel thread context (may sleep). | |
6145 | */ | |
6146 | void ata_port_detach(struct ata_port *ap) | |
6147 | { | |
6148 | unsigned long flags; | |
6149 | int i; | |
6150 | ||
6151 | if (!ap->ops->error_handler) | |
c3cf30a9 | 6152 | goto skip_eh; |
720ba126 TH |
6153 | |
6154 | /* tell EH we're leaving & flush EH */ | |
ba6a1308 | 6155 | spin_lock_irqsave(ap->lock, flags); |
b51e9e5d | 6156 | ap->pflags |= ATA_PFLAG_UNLOADING; |
ba6a1308 | 6157 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
6158 | |
6159 | ata_port_wait_eh(ap); | |
6160 | ||
6161 | /* EH is now guaranteed to see UNLOADING, so no new device | |
6162 | * will be attached. Disable all existing devices. | |
6163 | */ | |
ba6a1308 | 6164 | spin_lock_irqsave(ap->lock, flags); |
720ba126 TH |
6165 | |
6166 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
6167 | ata_dev_disable(&ap->device[i]); | |
6168 | ||
ba6a1308 | 6169 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
6170 | |
6171 | /* Final freeze & EH. All in-flight commands are aborted. EH | |
6172 | * will be skipped and retrials will be terminated with bad | |
6173 | * target. | |
6174 | */ | |
ba6a1308 | 6175 | spin_lock_irqsave(ap->lock, flags); |
720ba126 | 6176 | ata_port_freeze(ap); /* won't be thawed */ |
ba6a1308 | 6177 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
6178 | |
6179 | ata_port_wait_eh(ap); | |
6180 | ||
6181 | /* Flush hotplug task. The sequence is similar to | |
6182 | * ata_port_flush_task(). | |
6183 | */ | |
6184 | flush_workqueue(ata_aux_wq); | |
6185 | cancel_delayed_work(&ap->hotplug_task); | |
6186 | flush_workqueue(ata_aux_wq); | |
6187 | ||
c3cf30a9 | 6188 | skip_eh: |
720ba126 | 6189 | /* remove the associated SCSI host */ |
cca3974e | 6190 | scsi_remove_host(ap->scsi_host); |
720ba126 TH |
6191 | } |
6192 | ||
0529c159 TH |
6193 | /** |
6194 | * ata_host_detach - Detach all ports of an ATA host | |
6195 | * @host: Host to detach | |
6196 | * | |
6197 | * Detach all ports of @host. | |
6198 | * | |
6199 | * LOCKING: | |
6200 | * Kernel thread context (may sleep). | |
6201 | */ | |
6202 | void ata_host_detach(struct ata_host *host) | |
6203 | { | |
6204 | int i; | |
6205 | ||
6206 | for (i = 0; i < host->n_ports; i++) | |
6207 | ata_port_detach(host->ports[i]); | |
6208 | } | |
6209 | ||
1da177e4 LT |
6210 | /** |
6211 | * ata_std_ports - initialize ioaddr with standard port offsets. | |
6212 | * @ioaddr: IO address structure to be initialized | |
0baab86b EF |
6213 | * |
6214 | * Utility function which initializes data_addr, error_addr, | |
6215 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, | |
6216 | * device_addr, status_addr, and command_addr to standard offsets | |
6217 | * relative to cmd_addr. | |
6218 | * | |
6219 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. | |
1da177e4 | 6220 | */ |
0baab86b | 6221 | |
1da177e4 LT |
6222 | void ata_std_ports(struct ata_ioports *ioaddr) |
6223 | { | |
6224 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; | |
6225 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; | |
6226 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; | |
6227 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; | |
6228 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; | |
6229 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; | |
6230 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; | |
6231 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; | |
6232 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; | |
6233 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; | |
6234 | } | |
6235 | ||
0baab86b | 6236 | |
374b1873 JG |
6237 | #ifdef CONFIG_PCI |
6238 | ||
1da177e4 LT |
6239 | /** |
6240 | * ata_pci_remove_one - PCI layer callback for device removal | |
6241 | * @pdev: PCI device that was removed | |
6242 | * | |
b878ca5d TH |
6243 | * PCI layer indicates to libata via this hook that hot-unplug or |
6244 | * module unload event has occurred. Detach all ports. Resource | |
6245 | * release is handled via devres. | |
1da177e4 LT |
6246 | * |
6247 | * LOCKING: | |
6248 | * Inherited from PCI layer (may sleep). | |
6249 | */ | |
f0d36efd | 6250 | void ata_pci_remove_one(struct pci_dev *pdev) |
1da177e4 LT |
6251 | { |
6252 | struct device *dev = pci_dev_to_dev(pdev); | |
cca3974e | 6253 | struct ata_host *host = dev_get_drvdata(dev); |
1da177e4 | 6254 | |
b878ca5d | 6255 | ata_host_detach(host); |
1da177e4 LT |
6256 | } |
6257 | ||
6258 | /* move to PCI subsystem */ | |
057ace5e | 6259 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
6260 | { |
6261 | unsigned long tmp = 0; | |
6262 | ||
6263 | switch (bits->width) { | |
6264 | case 1: { | |
6265 | u8 tmp8 = 0; | |
6266 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
6267 | tmp = tmp8; | |
6268 | break; | |
6269 | } | |
6270 | case 2: { | |
6271 | u16 tmp16 = 0; | |
6272 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
6273 | tmp = tmp16; | |
6274 | break; | |
6275 | } | |
6276 | case 4: { | |
6277 | u32 tmp32 = 0; | |
6278 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
6279 | tmp = tmp32; | |
6280 | break; | |
6281 | } | |
6282 | ||
6283 | default: | |
6284 | return -EINVAL; | |
6285 | } | |
6286 | ||
6287 | tmp &= bits->mask; | |
6288 | ||
6289 | return (tmp == bits->val) ? 1 : 0; | |
6290 | } | |
9b847548 | 6291 | |
6ffa01d8 | 6292 | #ifdef CONFIG_PM |
3c5100c1 | 6293 | void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) |
9b847548 JA |
6294 | { |
6295 | pci_save_state(pdev); | |
4c90d971 | 6296 | pci_disable_device(pdev); |
500530f6 | 6297 | |
4c90d971 | 6298 | if (mesg.event == PM_EVENT_SUSPEND) |
500530f6 | 6299 | pci_set_power_state(pdev, PCI_D3hot); |
9b847548 JA |
6300 | } |
6301 | ||
553c4aa6 | 6302 | int ata_pci_device_do_resume(struct pci_dev *pdev) |
9b847548 | 6303 | { |
553c4aa6 TH |
6304 | int rc; |
6305 | ||
9b847548 JA |
6306 | pci_set_power_state(pdev, PCI_D0); |
6307 | pci_restore_state(pdev); | |
553c4aa6 | 6308 | |
b878ca5d | 6309 | rc = pcim_enable_device(pdev); |
553c4aa6 TH |
6310 | if (rc) { |
6311 | dev_printk(KERN_ERR, &pdev->dev, | |
6312 | "failed to enable device after resume (%d)\n", rc); | |
6313 | return rc; | |
6314 | } | |
6315 | ||
9b847548 | 6316 | pci_set_master(pdev); |
553c4aa6 | 6317 | return 0; |
500530f6 TH |
6318 | } |
6319 | ||
3c5100c1 | 6320 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) |
500530f6 | 6321 | { |
cca3974e | 6322 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
500530f6 TH |
6323 | int rc = 0; |
6324 | ||
cca3974e | 6325 | rc = ata_host_suspend(host, mesg); |
500530f6 TH |
6326 | if (rc) |
6327 | return rc; | |
6328 | ||
3c5100c1 | 6329 | ata_pci_device_do_suspend(pdev, mesg); |
500530f6 TH |
6330 | |
6331 | return 0; | |
6332 | } | |
6333 | ||
6334 | int ata_pci_device_resume(struct pci_dev *pdev) | |
6335 | { | |
cca3974e | 6336 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
553c4aa6 | 6337 | int rc; |
500530f6 | 6338 | |
553c4aa6 TH |
6339 | rc = ata_pci_device_do_resume(pdev); |
6340 | if (rc == 0) | |
6341 | ata_host_resume(host); | |
6342 | return rc; | |
9b847548 | 6343 | } |
6ffa01d8 TH |
6344 | #endif /* CONFIG_PM */ |
6345 | ||
1da177e4 LT |
6346 | #endif /* CONFIG_PCI */ |
6347 | ||
6348 | ||
1da177e4 LT |
6349 | static int __init ata_init(void) |
6350 | { | |
a8601e5f | 6351 | ata_probe_timeout *= HZ; |
1da177e4 LT |
6352 | ata_wq = create_workqueue("ata"); |
6353 | if (!ata_wq) | |
6354 | return -ENOMEM; | |
6355 | ||
453b07ac TH |
6356 | ata_aux_wq = create_singlethread_workqueue("ata_aux"); |
6357 | if (!ata_aux_wq) { | |
6358 | destroy_workqueue(ata_wq); | |
6359 | return -ENOMEM; | |
6360 | } | |
6361 | ||
1da177e4 LT |
6362 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
6363 | return 0; | |
6364 | } | |
6365 | ||
6366 | static void __exit ata_exit(void) | |
6367 | { | |
6368 | destroy_workqueue(ata_wq); | |
453b07ac | 6369 | destroy_workqueue(ata_aux_wq); |
1da177e4 LT |
6370 | } |
6371 | ||
a4625085 | 6372 | subsys_initcall(ata_init); |
1da177e4 LT |
6373 | module_exit(ata_exit); |
6374 | ||
67846b30 | 6375 | static unsigned long ratelimit_time; |
34af946a | 6376 | static DEFINE_SPINLOCK(ata_ratelimit_lock); |
67846b30 JG |
6377 | |
6378 | int ata_ratelimit(void) | |
6379 | { | |
6380 | int rc; | |
6381 | unsigned long flags; | |
6382 | ||
6383 | spin_lock_irqsave(&ata_ratelimit_lock, flags); | |
6384 | ||
6385 | if (time_after(jiffies, ratelimit_time)) { | |
6386 | rc = 1; | |
6387 | ratelimit_time = jiffies + (HZ/5); | |
6388 | } else | |
6389 | rc = 0; | |
6390 | ||
6391 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); | |
6392 | ||
6393 | return rc; | |
6394 | } | |
6395 | ||
c22daff4 TH |
6396 | /** |
6397 | * ata_wait_register - wait until register value changes | |
6398 | * @reg: IO-mapped register | |
6399 | * @mask: Mask to apply to read register value | |
6400 | * @val: Wait condition | |
6401 | * @interval_msec: polling interval in milliseconds | |
6402 | * @timeout_msec: timeout in milliseconds | |
6403 | * | |
6404 | * Waiting for some bits of register to change is a common | |
6405 | * operation for ATA controllers. This function reads 32bit LE | |
6406 | * IO-mapped register @reg and tests for the following condition. | |
6407 | * | |
6408 | * (*@reg & mask) != val | |
6409 | * | |
6410 | * If the condition is met, it returns; otherwise, the process is | |
6411 | * repeated after @interval_msec until timeout. | |
6412 | * | |
6413 | * LOCKING: | |
6414 | * Kernel thread context (may sleep) | |
6415 | * | |
6416 | * RETURNS: | |
6417 | * The final register value. | |
6418 | */ | |
6419 | u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, | |
6420 | unsigned long interval_msec, | |
6421 | unsigned long timeout_msec) | |
6422 | { | |
6423 | unsigned long timeout; | |
6424 | u32 tmp; | |
6425 | ||
6426 | tmp = ioread32(reg); | |
6427 | ||
6428 | /* Calculate timeout _after_ the first read to make sure | |
6429 | * preceding writes reach the controller before starting to | |
6430 | * eat away the timeout. | |
6431 | */ | |
6432 | timeout = jiffies + (timeout_msec * HZ) / 1000; | |
6433 | ||
6434 | while ((tmp & mask) == val && time_before(jiffies, timeout)) { | |
6435 | msleep(interval_msec); | |
6436 | tmp = ioread32(reg); | |
6437 | } | |
6438 | ||
6439 | return tmp; | |
6440 | } | |
6441 | ||
dd5b06c4 TH |
6442 | /* |
6443 | * Dummy port_ops | |
6444 | */ | |
6445 | static void ata_dummy_noret(struct ata_port *ap) { } | |
6446 | static int ata_dummy_ret0(struct ata_port *ap) { return 0; } | |
6447 | static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } | |
6448 | ||
6449 | static u8 ata_dummy_check_status(struct ata_port *ap) | |
6450 | { | |
6451 | return ATA_DRDY; | |
6452 | } | |
6453 | ||
6454 | static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) | |
6455 | { | |
6456 | return AC_ERR_SYSTEM; | |
6457 | } | |
6458 | ||
6459 | const struct ata_port_operations ata_dummy_port_ops = { | |
6460 | .port_disable = ata_port_disable, | |
6461 | .check_status = ata_dummy_check_status, | |
6462 | .check_altstatus = ata_dummy_check_status, | |
6463 | .dev_select = ata_noop_dev_select, | |
6464 | .qc_prep = ata_noop_qc_prep, | |
6465 | .qc_issue = ata_dummy_qc_issue, | |
6466 | .freeze = ata_dummy_noret, | |
6467 | .thaw = ata_dummy_noret, | |
6468 | .error_handler = ata_dummy_noret, | |
6469 | .post_internal_cmd = ata_dummy_qc_noret, | |
6470 | .irq_clear = ata_dummy_noret, | |
6471 | .port_start = ata_dummy_ret0, | |
6472 | .port_stop = ata_dummy_noret, | |
6473 | }; | |
6474 | ||
21b0ad4f TH |
6475 | const struct ata_port_info ata_dummy_port_info = { |
6476 | .port_ops = &ata_dummy_port_ops, | |
6477 | }; | |
6478 | ||
1da177e4 LT |
6479 | /* |
6480 | * libata is essentially a library of internal helper functions for | |
6481 | * low-level ATA host controller drivers. As such, the API/ABI is | |
6482 | * likely to change as new drivers are added and updated. | |
6483 | * Do not depend on ABI/API stability. | |
6484 | */ | |
6485 | ||
e9c83914 TH |
6486 | EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
6487 | EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); | |
6488 | EXPORT_SYMBOL_GPL(sata_deb_timing_long); | |
dd5b06c4 | 6489 | EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
21b0ad4f | 6490 | EXPORT_SYMBOL_GPL(ata_dummy_port_info); |
1da177e4 LT |
6491 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
6492 | EXPORT_SYMBOL_GPL(ata_std_ports); | |
cca3974e | 6493 | EXPORT_SYMBOL_GPL(ata_host_init); |
f3187195 | 6494 | EXPORT_SYMBOL_GPL(ata_host_alloc); |
f5cda257 | 6495 | EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); |
ecef7253 | 6496 | EXPORT_SYMBOL_GPL(ata_host_start); |
f3187195 | 6497 | EXPORT_SYMBOL_GPL(ata_host_register); |
f5cda257 | 6498 | EXPORT_SYMBOL_GPL(ata_host_activate); |
0529c159 | 6499 | EXPORT_SYMBOL_GPL(ata_host_detach); |
1da177e4 LT |
6500 | EXPORT_SYMBOL_GPL(ata_sg_init); |
6501 | EXPORT_SYMBOL_GPL(ata_sg_init_one); | |
9a1004d0 | 6502 | EXPORT_SYMBOL_GPL(ata_hsm_move); |
f686bcb8 | 6503 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
dedaf2b0 | 6504 | EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); |
1da177e4 | 6505 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
1da177e4 LT |
6506 | EXPORT_SYMBOL_GPL(ata_tf_load); |
6507 | EXPORT_SYMBOL_GPL(ata_tf_read); | |
6508 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); | |
6509 | EXPORT_SYMBOL_GPL(ata_std_dev_select); | |
43727fbc | 6510 | EXPORT_SYMBOL_GPL(sata_print_link_status); |
1da177e4 LT |
6511 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
6512 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
6513 | EXPORT_SYMBOL_GPL(ata_check_status); | |
6514 | EXPORT_SYMBOL_GPL(ata_altstatus); | |
1da177e4 LT |
6515 | EXPORT_SYMBOL_GPL(ata_exec_command); |
6516 | EXPORT_SYMBOL_GPL(ata_port_start); | |
1da177e4 | 6517 | EXPORT_SYMBOL_GPL(ata_interrupt); |
04351821 | 6518 | EXPORT_SYMBOL_GPL(ata_do_set_mode); |
0d5ff566 TH |
6519 | EXPORT_SYMBOL_GPL(ata_data_xfer); |
6520 | EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); | |
1da177e4 | 6521 | EXPORT_SYMBOL_GPL(ata_qc_prep); |
e46834cd | 6522 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
1da177e4 LT |
6523 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
6524 | EXPORT_SYMBOL_GPL(ata_bmdma_start); | |
6525 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); | |
6526 | EXPORT_SYMBOL_GPL(ata_bmdma_status); | |
6527 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); | |
6d97dbd7 TH |
6528 | EXPORT_SYMBOL_GPL(ata_bmdma_freeze); |
6529 | EXPORT_SYMBOL_GPL(ata_bmdma_thaw); | |
6530 | EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); | |
6531 | EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); | |
6532 | EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); | |
1da177e4 | 6533 | EXPORT_SYMBOL_GPL(ata_port_probe); |
10305f0f | 6534 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
3c567b7d | 6535 | EXPORT_SYMBOL_GPL(sata_set_spd); |
d7bb4cc7 TH |
6536 | EXPORT_SYMBOL_GPL(sata_phy_debounce); |
6537 | EXPORT_SYMBOL_GPL(sata_phy_resume); | |
1da177e4 LT |
6538 | EXPORT_SYMBOL_GPL(sata_phy_reset); |
6539 | EXPORT_SYMBOL_GPL(__sata_phy_reset); | |
6540 | EXPORT_SYMBOL_GPL(ata_bus_reset); | |
f5914a46 | 6541 | EXPORT_SYMBOL_GPL(ata_std_prereset); |
c2bd5804 | 6542 | EXPORT_SYMBOL_GPL(ata_std_softreset); |
b6103f6d | 6543 | EXPORT_SYMBOL_GPL(sata_port_hardreset); |
c2bd5804 TH |
6544 | EXPORT_SYMBOL_GPL(sata_std_hardreset); |
6545 | EXPORT_SYMBOL_GPL(ata_std_postreset); | |
2e9edbf8 JG |
6546 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
6547 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
1da177e4 | 6548 | EXPORT_SYMBOL_GPL(ata_port_disable); |
67846b30 | 6549 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
c22daff4 | 6550 | EXPORT_SYMBOL_GPL(ata_wait_register); |
6f8b9958 | 6551 | EXPORT_SYMBOL_GPL(ata_busy_sleep); |
86e45b6b | 6552 | EXPORT_SYMBOL_GPL(ata_port_queue_task); |
1da177e4 LT |
6553 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
6554 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); | |
1da177e4 | 6555 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
83c47bcb | 6556 | EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); |
a6e6ce8e | 6557 | EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); |
1da177e4 | 6558 | EXPORT_SYMBOL_GPL(ata_host_intr); |
34bf2170 TH |
6559 | EXPORT_SYMBOL_GPL(sata_scr_valid); |
6560 | EXPORT_SYMBOL_GPL(sata_scr_read); | |
6561 | EXPORT_SYMBOL_GPL(sata_scr_write); | |
6562 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); | |
6563 | EXPORT_SYMBOL_GPL(ata_port_online); | |
6564 | EXPORT_SYMBOL_GPL(ata_port_offline); | |
6ffa01d8 | 6565 | #ifdef CONFIG_PM |
cca3974e JG |
6566 | EXPORT_SYMBOL_GPL(ata_host_suspend); |
6567 | EXPORT_SYMBOL_GPL(ata_host_resume); | |
6ffa01d8 | 6568 | #endif /* CONFIG_PM */ |
6a62a04d TH |
6569 | EXPORT_SYMBOL_GPL(ata_id_string); |
6570 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
10305f0f | 6571 | EXPORT_SYMBOL_GPL(ata_id_to_dma_mode); |
6919a0a6 | 6572 | EXPORT_SYMBOL_GPL(ata_device_blacklisted); |
1da177e4 LT |
6573 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
6574 | ||
1bc4ccff | 6575 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
452503f9 AC |
6576 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
6577 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
6578 | ||
1da177e4 LT |
6579 | #ifdef CONFIG_PCI |
6580 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
d491b27b | 6581 | EXPORT_SYMBOL_GPL(ata_pci_init_native_host); |
21b0ad4f | 6582 | EXPORT_SYMBOL_GPL(ata_pci_prepare_native_host); |
1da177e4 LT |
6583 | EXPORT_SYMBOL_GPL(ata_pci_init_one); |
6584 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); | |
6ffa01d8 | 6585 | #ifdef CONFIG_PM |
500530f6 TH |
6586 | EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
6587 | EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); | |
9b847548 JA |
6588 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
6589 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
6ffa01d8 | 6590 | #endif /* CONFIG_PM */ |
67951ade AC |
6591 | EXPORT_SYMBOL_GPL(ata_pci_default_filter); |
6592 | EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); | |
1da177e4 | 6593 | #endif /* CONFIG_PCI */ |
9b847548 | 6594 | |
6ffa01d8 | 6595 | #ifdef CONFIG_PM |
9b847548 JA |
6596 | EXPORT_SYMBOL_GPL(ata_scsi_device_suspend); |
6597 | EXPORT_SYMBOL_GPL(ata_scsi_device_resume); | |
6ffa01d8 | 6598 | #endif /* CONFIG_PM */ |
ece1d636 | 6599 | |
ece1d636 | 6600 | EXPORT_SYMBOL_GPL(ata_eng_timeout); |
7b70fc03 TH |
6601 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
6602 | EXPORT_SYMBOL_GPL(ata_port_abort); | |
e3180499 TH |
6603 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
6604 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); | |
6605 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); | |
ece1d636 TH |
6606 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
6607 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
022bdb07 | 6608 | EXPORT_SYMBOL_GPL(ata_do_eh); |
83625006 AI |
6609 | EXPORT_SYMBOL_GPL(ata_irq_on); |
6610 | EXPORT_SYMBOL_GPL(ata_dummy_irq_on); | |
6611 | EXPORT_SYMBOL_GPL(ata_irq_ack); | |
6612 | EXPORT_SYMBOL_GPL(ata_dummy_irq_ack); | |
a619f981 | 6613 | EXPORT_SYMBOL_GPL(ata_dev_try_classify); |
be0d18df AC |
6614 | |
6615 | EXPORT_SYMBOL_GPL(ata_cable_40wire); | |
6616 | EXPORT_SYMBOL_GPL(ata_cable_80wire); | |
6617 | EXPORT_SYMBOL_GPL(ata_cable_unknown); | |
6618 | EXPORT_SYMBOL_GPL(ata_cable_sata); |