Commit | Line | Data |
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1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-core.c - helper library for ATA |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from http://www.t13.org/ and | |
31 | * http://www.sata-io.org/ | |
32 | * | |
92c52c52 AC |
33 | * Standards documents from: |
34 | * http://www.t13.org (ATA standards, PCI DMA IDE spec) | |
35 | * http://www.t10.org (SCSI MMC - for ATAPI MMC) | |
36 | * http://www.sata-io.org (SATA) | |
37 | * http://www.compactflash.org (CF) | |
38 | * http://www.qic.org (QIC157 - Tape and DSC) | |
39 | * http://www.ce-ata.org (CE-ATA: not supported) | |
40 | * | |
1da177e4 LT |
41 | */ |
42 | ||
1da177e4 LT |
43 | #include <linux/kernel.h> |
44 | #include <linux/module.h> | |
45 | #include <linux/pci.h> | |
46 | #include <linux/init.h> | |
47 | #include <linux/list.h> | |
48 | #include <linux/mm.h> | |
1da177e4 LT |
49 | #include <linux/spinlock.h> |
50 | #include <linux/blkdev.h> | |
51 | #include <linux/delay.h> | |
52 | #include <linux/timer.h> | |
53 | #include <linux/interrupt.h> | |
54 | #include <linux/completion.h> | |
55 | #include <linux/suspend.h> | |
56 | #include <linux/workqueue.h> | |
378f058c | 57 | #include <linux/scatterlist.h> |
2dcb407e | 58 | #include <linux/io.h> |
79318057 | 59 | #include <linux/async.h> |
e18086d6 | 60 | #include <linux/log2.h> |
5a0e3ad6 | 61 | #include <linux/slab.h> |
1da177e4 | 62 | #include <scsi/scsi.h> |
193515d5 | 63 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
64 | #include <scsi/scsi_host.h> |
65 | #include <linux/libata.h> | |
1da177e4 | 66 | #include <asm/byteorder.h> |
140b5e59 | 67 | #include <linux/cdrom.h> |
9990b6f3 | 68 | #include <linux/ratelimit.h> |
1da177e4 LT |
69 | |
70 | #include "libata.h" | |
d9027470 | 71 | #include "libata-transport.h" |
fda0efc5 | 72 | |
d7bb4cc7 | 73 | /* debounce timing parameters in msecs { interval, duration, timeout } */ |
e9c83914 TH |
74 | const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; |
75 | const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; | |
76 | const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; | |
d7bb4cc7 | 77 | |
029cfd6b | 78 | const struct ata_port_operations ata_base_port_ops = { |
0aa1113d | 79 | .prereset = ata_std_prereset, |
203c75b8 | 80 | .postreset = ata_std_postreset, |
a1efdaba | 81 | .error_handler = ata_std_error_handler, |
029cfd6b TH |
82 | }; |
83 | ||
84 | const struct ata_port_operations sata_port_ops = { | |
85 | .inherits = &ata_base_port_ops, | |
86 | ||
87 | .qc_defer = ata_std_qc_defer, | |
57c9efdf | 88 | .hardreset = sata_std_hardreset, |
029cfd6b TH |
89 | }; |
90 | ||
3373efd8 TH |
91 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
92 | u16 heads, u16 sectors); | |
93 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev); | |
94 | static void ata_dev_xfermask(struct ata_device *dev); | |
75683fe7 | 95 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev); |
1da177e4 | 96 | |
f3187195 | 97 | unsigned int ata_print_id = 1; |
1da177e4 | 98 | |
33267325 TH |
99 | struct ata_force_param { |
100 | const char *name; | |
101 | unsigned int cbl; | |
102 | int spd_limit; | |
103 | unsigned long xfer_mask; | |
104 | unsigned int horkage_on; | |
105 | unsigned int horkage_off; | |
05944bdf | 106 | unsigned int lflags; |
33267325 TH |
107 | }; |
108 | ||
109 | struct ata_force_ent { | |
110 | int port; | |
111 | int device; | |
112 | struct ata_force_param param; | |
113 | }; | |
114 | ||
115 | static struct ata_force_ent *ata_force_tbl; | |
116 | static int ata_force_tbl_size; | |
117 | ||
118 | static char ata_force_param_buf[PAGE_SIZE] __initdata; | |
7afb4222 TH |
119 | /* param_buf is thrown away after initialization, disallow read */ |
120 | module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); | |
33267325 TH |
121 | MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)"); |
122 | ||
2486fa56 | 123 | static int atapi_enabled = 1; |
1623c81e | 124 | module_param(atapi_enabled, int, 0444); |
ad5d8eac | 125 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])"); |
1623c81e | 126 | |
c5c61bda | 127 | static int atapi_dmadir = 0; |
95de719a | 128 | module_param(atapi_dmadir, int, 0444); |
ad5d8eac | 129 | MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)"); |
95de719a | 130 | |
baf4fdfa ML |
131 | int atapi_passthru16 = 1; |
132 | module_param(atapi_passthru16, int, 0444); | |
ad5d8eac | 133 | MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])"); |
baf4fdfa | 134 | |
c3c013a2 JG |
135 | int libata_fua = 0; |
136 | module_param_named(fua, libata_fua, int, 0444); | |
ad5d8eac | 137 | MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)"); |
c3c013a2 | 138 | |
2dcb407e | 139 | static int ata_ignore_hpa; |
1e999736 AC |
140 | module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); |
141 | MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); | |
142 | ||
b3a70601 AC |
143 | static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; |
144 | module_param_named(dma, libata_dma_mask, int, 0444); | |
145 | MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); | |
146 | ||
87fbc5a0 | 147 | static int ata_probe_timeout; |
a8601e5f AM |
148 | module_param(ata_probe_timeout, int, 0444); |
149 | MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); | |
150 | ||
6ebe9d86 | 151 | int libata_noacpi = 0; |
d7d0dad6 | 152 | module_param_named(noacpi, libata_noacpi, int, 0444); |
ad5d8eac | 153 | MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)"); |
11ef697b | 154 | |
ae8d4ee7 AC |
155 | int libata_allow_tpm = 0; |
156 | module_param_named(allow_tpm, libata_allow_tpm, int, 0444); | |
ad5d8eac | 157 | MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)"); |
ae8d4ee7 | 158 | |
e7ecd435 TH |
159 | static int atapi_an; |
160 | module_param(atapi_an, int, 0444); | |
161 | MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)"); | |
162 | ||
1da177e4 LT |
163 | MODULE_AUTHOR("Jeff Garzik"); |
164 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
165 | MODULE_LICENSE("GPL"); | |
166 | MODULE_VERSION(DRV_VERSION); | |
167 | ||
0baab86b | 168 | |
9913ff8a TH |
169 | static bool ata_sstatus_online(u32 sstatus) |
170 | { | |
171 | return (sstatus & 0xf) == 0x3; | |
172 | } | |
173 | ||
1eca4365 TH |
174 | /** |
175 | * ata_link_next - link iteration helper | |
176 | * @link: the previous link, NULL to start | |
177 | * @ap: ATA port containing links to iterate | |
178 | * @mode: iteration mode, one of ATA_LITER_* | |
179 | * | |
180 | * LOCKING: | |
181 | * Host lock or EH context. | |
aadffb68 | 182 | * |
1eca4365 TH |
183 | * RETURNS: |
184 | * Pointer to the next link. | |
aadffb68 | 185 | */ |
1eca4365 TH |
186 | struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap, |
187 | enum ata_link_iter_mode mode) | |
aadffb68 | 188 | { |
1eca4365 TH |
189 | BUG_ON(mode != ATA_LITER_EDGE && |
190 | mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST); | |
191 | ||
aadffb68 | 192 | /* NULL link indicates start of iteration */ |
1eca4365 TH |
193 | if (!link) |
194 | switch (mode) { | |
195 | case ATA_LITER_EDGE: | |
196 | case ATA_LITER_PMP_FIRST: | |
197 | if (sata_pmp_attached(ap)) | |
198 | return ap->pmp_link; | |
199 | /* fall through */ | |
200 | case ATA_LITER_HOST_FIRST: | |
201 | return &ap->link; | |
202 | } | |
aadffb68 | 203 | |
1eca4365 TH |
204 | /* we just iterated over the host link, what's next? */ |
205 | if (link == &ap->link) | |
206 | switch (mode) { | |
207 | case ATA_LITER_HOST_FIRST: | |
208 | if (sata_pmp_attached(ap)) | |
209 | return ap->pmp_link; | |
210 | /* fall through */ | |
211 | case ATA_LITER_PMP_FIRST: | |
212 | if (unlikely(ap->slave_link)) | |
b1c72916 | 213 | return ap->slave_link; |
1eca4365 TH |
214 | /* fall through */ |
215 | case ATA_LITER_EDGE: | |
aadffb68 | 216 | return NULL; |
b1c72916 | 217 | } |
aadffb68 | 218 | |
b1c72916 TH |
219 | /* slave_link excludes PMP */ |
220 | if (unlikely(link == ap->slave_link)) | |
221 | return NULL; | |
222 | ||
1eca4365 | 223 | /* we were over a PMP link */ |
aadffb68 TH |
224 | if (++link < ap->pmp_link + ap->nr_pmp_links) |
225 | return link; | |
1eca4365 TH |
226 | |
227 | if (mode == ATA_LITER_PMP_FIRST) | |
228 | return &ap->link; | |
229 | ||
aadffb68 TH |
230 | return NULL; |
231 | } | |
232 | ||
1eca4365 TH |
233 | /** |
234 | * ata_dev_next - device iteration helper | |
235 | * @dev: the previous device, NULL to start | |
236 | * @link: ATA link containing devices to iterate | |
237 | * @mode: iteration mode, one of ATA_DITER_* | |
238 | * | |
239 | * LOCKING: | |
240 | * Host lock or EH context. | |
241 | * | |
242 | * RETURNS: | |
243 | * Pointer to the next device. | |
244 | */ | |
245 | struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link, | |
246 | enum ata_dev_iter_mode mode) | |
247 | { | |
248 | BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE && | |
249 | mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE); | |
250 | ||
251 | /* NULL dev indicates start of iteration */ | |
252 | if (!dev) | |
253 | switch (mode) { | |
254 | case ATA_DITER_ENABLED: | |
255 | case ATA_DITER_ALL: | |
256 | dev = link->device; | |
257 | goto check; | |
258 | case ATA_DITER_ENABLED_REVERSE: | |
259 | case ATA_DITER_ALL_REVERSE: | |
260 | dev = link->device + ata_link_max_devices(link) - 1; | |
261 | goto check; | |
262 | } | |
263 | ||
264 | next: | |
265 | /* move to the next one */ | |
266 | switch (mode) { | |
267 | case ATA_DITER_ENABLED: | |
268 | case ATA_DITER_ALL: | |
269 | if (++dev < link->device + ata_link_max_devices(link)) | |
270 | goto check; | |
271 | return NULL; | |
272 | case ATA_DITER_ENABLED_REVERSE: | |
273 | case ATA_DITER_ALL_REVERSE: | |
274 | if (--dev >= link->device) | |
275 | goto check; | |
276 | return NULL; | |
277 | } | |
278 | ||
279 | check: | |
280 | if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) && | |
281 | !ata_dev_enabled(dev)) | |
282 | goto next; | |
283 | return dev; | |
284 | } | |
285 | ||
b1c72916 TH |
286 | /** |
287 | * ata_dev_phys_link - find physical link for a device | |
288 | * @dev: ATA device to look up physical link for | |
289 | * | |
290 | * Look up physical link which @dev is attached to. Note that | |
291 | * this is different from @dev->link only when @dev is on slave | |
292 | * link. For all other cases, it's the same as @dev->link. | |
293 | * | |
294 | * LOCKING: | |
295 | * Don't care. | |
296 | * | |
297 | * RETURNS: | |
298 | * Pointer to the found physical link. | |
299 | */ | |
300 | struct ata_link *ata_dev_phys_link(struct ata_device *dev) | |
301 | { | |
302 | struct ata_port *ap = dev->link->ap; | |
303 | ||
304 | if (!ap->slave_link) | |
305 | return dev->link; | |
306 | if (!dev->devno) | |
307 | return &ap->link; | |
308 | return ap->slave_link; | |
309 | } | |
310 | ||
33267325 TH |
311 | /** |
312 | * ata_force_cbl - force cable type according to libata.force | |
4cdfa1b3 | 313 | * @ap: ATA port of interest |
33267325 TH |
314 | * |
315 | * Force cable type according to libata.force and whine about it. | |
316 | * The last entry which has matching port number is used, so it | |
317 | * can be specified as part of device force parameters. For | |
318 | * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the | |
319 | * same effect. | |
320 | * | |
321 | * LOCKING: | |
322 | * EH context. | |
323 | */ | |
324 | void ata_force_cbl(struct ata_port *ap) | |
325 | { | |
326 | int i; | |
327 | ||
328 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
329 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
330 | ||
331 | if (fe->port != -1 && fe->port != ap->print_id) | |
332 | continue; | |
333 | ||
334 | if (fe->param.cbl == ATA_CBL_NONE) | |
335 | continue; | |
336 | ||
337 | ap->cbl = fe->param.cbl; | |
338 | ata_port_printk(ap, KERN_NOTICE, | |
339 | "FORCE: cable set to %s\n", fe->param.name); | |
340 | return; | |
341 | } | |
342 | } | |
343 | ||
344 | /** | |
05944bdf | 345 | * ata_force_link_limits - force link limits according to libata.force |
33267325 TH |
346 | * @link: ATA link of interest |
347 | * | |
05944bdf TH |
348 | * Force link flags and SATA spd limit according to libata.force |
349 | * and whine about it. When only the port part is specified | |
350 | * (e.g. 1:), the limit applies to all links connected to both | |
351 | * the host link and all fan-out ports connected via PMP. If the | |
352 | * device part is specified as 0 (e.g. 1.00:), it specifies the | |
353 | * first fan-out link not the host link. Device number 15 always | |
b1c72916 TH |
354 | * points to the host link whether PMP is attached or not. If the |
355 | * controller has slave link, device number 16 points to it. | |
33267325 TH |
356 | * |
357 | * LOCKING: | |
358 | * EH context. | |
359 | */ | |
05944bdf | 360 | static void ata_force_link_limits(struct ata_link *link) |
33267325 | 361 | { |
05944bdf | 362 | bool did_spd = false; |
b1c72916 TH |
363 | int linkno = link->pmp; |
364 | int i; | |
33267325 TH |
365 | |
366 | if (ata_is_host_link(link)) | |
b1c72916 | 367 | linkno += 15; |
33267325 TH |
368 | |
369 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
370 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
371 | ||
372 | if (fe->port != -1 && fe->port != link->ap->print_id) | |
373 | continue; | |
374 | ||
375 | if (fe->device != -1 && fe->device != linkno) | |
376 | continue; | |
377 | ||
05944bdf TH |
378 | /* only honor the first spd limit */ |
379 | if (!did_spd && fe->param.spd_limit) { | |
380 | link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; | |
381 | ata_link_printk(link, KERN_NOTICE, | |
382 | "FORCE: PHY spd limit set to %s\n", | |
383 | fe->param.name); | |
384 | did_spd = true; | |
385 | } | |
33267325 | 386 | |
05944bdf TH |
387 | /* let lflags stack */ |
388 | if (fe->param.lflags) { | |
389 | link->flags |= fe->param.lflags; | |
390 | ata_link_printk(link, KERN_NOTICE, | |
391 | "FORCE: link flag 0x%x forced -> 0x%x\n", | |
392 | fe->param.lflags, link->flags); | |
393 | } | |
33267325 TH |
394 | } |
395 | } | |
396 | ||
397 | /** | |
398 | * ata_force_xfermask - force xfermask according to libata.force | |
399 | * @dev: ATA device of interest | |
400 | * | |
401 | * Force xfer_mask according to libata.force and whine about it. | |
402 | * For consistency with link selection, device number 15 selects | |
403 | * the first device connected to the host link. | |
404 | * | |
405 | * LOCKING: | |
406 | * EH context. | |
407 | */ | |
408 | static void ata_force_xfermask(struct ata_device *dev) | |
409 | { | |
410 | int devno = dev->link->pmp + dev->devno; | |
411 | int alt_devno = devno; | |
412 | int i; | |
413 | ||
b1c72916 TH |
414 | /* allow n.15/16 for devices attached to host port */ |
415 | if (ata_is_host_link(dev->link)) | |
416 | alt_devno += 15; | |
33267325 TH |
417 | |
418 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
419 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
420 | unsigned long pio_mask, mwdma_mask, udma_mask; | |
421 | ||
422 | if (fe->port != -1 && fe->port != dev->link->ap->print_id) | |
423 | continue; | |
424 | ||
425 | if (fe->device != -1 && fe->device != devno && | |
426 | fe->device != alt_devno) | |
427 | continue; | |
428 | ||
429 | if (!fe->param.xfer_mask) | |
430 | continue; | |
431 | ||
432 | ata_unpack_xfermask(fe->param.xfer_mask, | |
433 | &pio_mask, &mwdma_mask, &udma_mask); | |
434 | if (udma_mask) | |
435 | dev->udma_mask = udma_mask; | |
436 | else if (mwdma_mask) { | |
437 | dev->udma_mask = 0; | |
438 | dev->mwdma_mask = mwdma_mask; | |
439 | } else { | |
440 | dev->udma_mask = 0; | |
441 | dev->mwdma_mask = 0; | |
442 | dev->pio_mask = pio_mask; | |
443 | } | |
444 | ||
445 | ata_dev_printk(dev, KERN_NOTICE, | |
446 | "FORCE: xfer_mask set to %s\n", fe->param.name); | |
447 | return; | |
448 | } | |
449 | } | |
450 | ||
451 | /** | |
452 | * ata_force_horkage - force horkage according to libata.force | |
453 | * @dev: ATA device of interest | |
454 | * | |
455 | * Force horkage according to libata.force and whine about it. | |
456 | * For consistency with link selection, device number 15 selects | |
457 | * the first device connected to the host link. | |
458 | * | |
459 | * LOCKING: | |
460 | * EH context. | |
461 | */ | |
462 | static void ata_force_horkage(struct ata_device *dev) | |
463 | { | |
464 | int devno = dev->link->pmp + dev->devno; | |
465 | int alt_devno = devno; | |
466 | int i; | |
467 | ||
b1c72916 TH |
468 | /* allow n.15/16 for devices attached to host port */ |
469 | if (ata_is_host_link(dev->link)) | |
470 | alt_devno += 15; | |
33267325 TH |
471 | |
472 | for (i = 0; i < ata_force_tbl_size; i++) { | |
473 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
474 | ||
475 | if (fe->port != -1 && fe->port != dev->link->ap->print_id) | |
476 | continue; | |
477 | ||
478 | if (fe->device != -1 && fe->device != devno && | |
479 | fe->device != alt_devno) | |
480 | continue; | |
481 | ||
482 | if (!(~dev->horkage & fe->param.horkage_on) && | |
483 | !(dev->horkage & fe->param.horkage_off)) | |
484 | continue; | |
485 | ||
486 | dev->horkage |= fe->param.horkage_on; | |
487 | dev->horkage &= ~fe->param.horkage_off; | |
488 | ||
489 | ata_dev_printk(dev, KERN_NOTICE, | |
490 | "FORCE: horkage modified (%s)\n", fe->param.name); | |
491 | } | |
492 | } | |
493 | ||
436d34b3 TH |
494 | /** |
495 | * atapi_cmd_type - Determine ATAPI command type from SCSI opcode | |
496 | * @opcode: SCSI opcode | |
497 | * | |
498 | * Determine ATAPI command type from @opcode. | |
499 | * | |
500 | * LOCKING: | |
501 | * None. | |
502 | * | |
503 | * RETURNS: | |
504 | * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC} | |
505 | */ | |
506 | int atapi_cmd_type(u8 opcode) | |
507 | { | |
508 | switch (opcode) { | |
509 | case GPCMD_READ_10: | |
510 | case GPCMD_READ_12: | |
511 | return ATAPI_READ; | |
512 | ||
513 | case GPCMD_WRITE_10: | |
514 | case GPCMD_WRITE_12: | |
515 | case GPCMD_WRITE_AND_VERIFY_10: | |
516 | return ATAPI_WRITE; | |
517 | ||
518 | case GPCMD_READ_CD: | |
519 | case GPCMD_READ_CD_MSF: | |
520 | return ATAPI_READ_CD; | |
521 | ||
e52dcc48 TH |
522 | case ATA_16: |
523 | case ATA_12: | |
524 | if (atapi_passthru16) | |
525 | return ATAPI_PASS_THRU; | |
526 | /* fall thru */ | |
436d34b3 TH |
527 | default: |
528 | return ATAPI_MISC; | |
529 | } | |
530 | } | |
531 | ||
1da177e4 LT |
532 | /** |
533 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
534 | * @tf: Taskfile to convert | |
1da177e4 | 535 | * @pmp: Port multiplier port |
9977126c TH |
536 | * @is_cmd: This FIS is for command |
537 | * @fis: Buffer into which data will output | |
1da177e4 LT |
538 | * |
539 | * Converts a standard ATA taskfile to a Serial ATA | |
540 | * FIS structure (Register - Host to Device). | |
541 | * | |
542 | * LOCKING: | |
543 | * Inherited from caller. | |
544 | */ | |
9977126c | 545 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) |
1da177e4 | 546 | { |
9977126c TH |
547 | fis[0] = 0x27; /* Register - Host to Device FIS */ |
548 | fis[1] = pmp & 0xf; /* Port multiplier number*/ | |
549 | if (is_cmd) | |
550 | fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ | |
551 | ||
1da177e4 LT |
552 | fis[2] = tf->command; |
553 | fis[3] = tf->feature; | |
554 | ||
555 | fis[4] = tf->lbal; | |
556 | fis[5] = tf->lbam; | |
557 | fis[6] = tf->lbah; | |
558 | fis[7] = tf->device; | |
559 | ||
560 | fis[8] = tf->hob_lbal; | |
561 | fis[9] = tf->hob_lbam; | |
562 | fis[10] = tf->hob_lbah; | |
563 | fis[11] = tf->hob_feature; | |
564 | ||
565 | fis[12] = tf->nsect; | |
566 | fis[13] = tf->hob_nsect; | |
567 | fis[14] = 0; | |
568 | fis[15] = tf->ctl; | |
569 | ||
570 | fis[16] = 0; | |
571 | fis[17] = 0; | |
572 | fis[18] = 0; | |
573 | fis[19] = 0; | |
574 | } | |
575 | ||
576 | /** | |
577 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
578 | * @fis: Buffer from which data will be input | |
579 | * @tf: Taskfile to output | |
580 | * | |
e12a1be6 | 581 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
582 | * |
583 | * LOCKING: | |
584 | * Inherited from caller. | |
585 | */ | |
586 | ||
057ace5e | 587 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
588 | { |
589 | tf->command = fis[2]; /* status */ | |
590 | tf->feature = fis[3]; /* error */ | |
591 | ||
592 | tf->lbal = fis[4]; | |
593 | tf->lbam = fis[5]; | |
594 | tf->lbah = fis[6]; | |
595 | tf->device = fis[7]; | |
596 | ||
597 | tf->hob_lbal = fis[8]; | |
598 | tf->hob_lbam = fis[9]; | |
599 | tf->hob_lbah = fis[10]; | |
600 | ||
601 | tf->nsect = fis[12]; | |
602 | tf->hob_nsect = fis[13]; | |
603 | } | |
604 | ||
8cbd6df1 AL |
605 | static const u8 ata_rw_cmds[] = { |
606 | /* pio multi */ | |
607 | ATA_CMD_READ_MULTI, | |
608 | ATA_CMD_WRITE_MULTI, | |
609 | ATA_CMD_READ_MULTI_EXT, | |
610 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
611 | 0, |
612 | 0, | |
613 | 0, | |
614 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
615 | /* pio */ |
616 | ATA_CMD_PIO_READ, | |
617 | ATA_CMD_PIO_WRITE, | |
618 | ATA_CMD_PIO_READ_EXT, | |
619 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
620 | 0, |
621 | 0, | |
622 | 0, | |
623 | 0, | |
8cbd6df1 AL |
624 | /* dma */ |
625 | ATA_CMD_READ, | |
626 | ATA_CMD_WRITE, | |
627 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
628 | ATA_CMD_WRITE_EXT, |
629 | 0, | |
630 | 0, | |
631 | 0, | |
632 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 633 | }; |
1da177e4 LT |
634 | |
635 | /** | |
8cbd6df1 | 636 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
bd056d7e TH |
637 | * @tf: command to examine and configure |
638 | * @dev: device tf belongs to | |
1da177e4 | 639 | * |
2e9edbf8 | 640 | * Examine the device configuration and tf->flags to calculate |
8cbd6df1 | 641 | * the proper read/write commands and protocol to use. |
1da177e4 LT |
642 | * |
643 | * LOCKING: | |
644 | * caller. | |
645 | */ | |
bd056d7e | 646 | static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) |
1da177e4 | 647 | { |
9a3dccc4 | 648 | u8 cmd; |
1da177e4 | 649 | |
9a3dccc4 | 650 | int index, fua, lba48, write; |
2e9edbf8 | 651 | |
9a3dccc4 | 652 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
653 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
654 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 655 | |
8cbd6df1 AL |
656 | if (dev->flags & ATA_DFLAG_PIO) { |
657 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 658 | index = dev->multi_count ? 0 : 8; |
9af5c9c9 | 659 | } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { |
8d238e01 AC |
660 | /* Unable to use DMA due to host limitation */ |
661 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 662 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
663 | } else { |
664 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 665 | index = 16; |
8cbd6df1 | 666 | } |
1da177e4 | 667 | |
9a3dccc4 TH |
668 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
669 | if (cmd) { | |
670 | tf->command = cmd; | |
671 | return 0; | |
672 | } | |
673 | return -1; | |
1da177e4 LT |
674 | } |
675 | ||
35b649fe TH |
676 | /** |
677 | * ata_tf_read_block - Read block address from ATA taskfile | |
678 | * @tf: ATA taskfile of interest | |
679 | * @dev: ATA device @tf belongs to | |
680 | * | |
681 | * LOCKING: | |
682 | * None. | |
683 | * | |
684 | * Read block address from @tf. This function can handle all | |
685 | * three address formats - LBA, LBA48 and CHS. tf->protocol and | |
686 | * flags select the address format to use. | |
687 | * | |
688 | * RETURNS: | |
689 | * Block address read from @tf. | |
690 | */ | |
691 | u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) | |
692 | { | |
693 | u64 block = 0; | |
694 | ||
695 | if (tf->flags & ATA_TFLAG_LBA) { | |
696 | if (tf->flags & ATA_TFLAG_LBA48) { | |
697 | block |= (u64)tf->hob_lbah << 40; | |
698 | block |= (u64)tf->hob_lbam << 32; | |
44901a96 | 699 | block |= (u64)tf->hob_lbal << 24; |
35b649fe TH |
700 | } else |
701 | block |= (tf->device & 0xf) << 24; | |
702 | ||
703 | block |= tf->lbah << 16; | |
704 | block |= tf->lbam << 8; | |
705 | block |= tf->lbal; | |
706 | } else { | |
707 | u32 cyl, head, sect; | |
708 | ||
709 | cyl = tf->lbam | (tf->lbah << 8); | |
710 | head = tf->device & 0xf; | |
711 | sect = tf->lbal; | |
712 | ||
ac8672ea TH |
713 | if (!sect) { |
714 | ata_dev_printk(dev, KERN_WARNING, "device reported " | |
715 | "invalid CHS sector 0\n"); | |
716 | sect = 1; /* oh well */ | |
717 | } | |
718 | ||
719 | block = (cyl * dev->heads + head) * dev->sectors + sect - 1; | |
35b649fe TH |
720 | } |
721 | ||
722 | return block; | |
723 | } | |
724 | ||
bd056d7e TH |
725 | /** |
726 | * ata_build_rw_tf - Build ATA taskfile for given read/write request | |
727 | * @tf: Target ATA taskfile | |
728 | * @dev: ATA device @tf belongs to | |
729 | * @block: Block address | |
730 | * @n_block: Number of blocks | |
731 | * @tf_flags: RW/FUA etc... | |
732 | * @tag: tag | |
733 | * | |
734 | * LOCKING: | |
735 | * None. | |
736 | * | |
737 | * Build ATA taskfile @tf for read/write request described by | |
738 | * @block, @n_block, @tf_flags and @tag on @dev. | |
739 | * | |
740 | * RETURNS: | |
741 | * | |
742 | * 0 on success, -ERANGE if the request is too large for @dev, | |
743 | * -EINVAL if the request is invalid. | |
744 | */ | |
745 | int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, | |
746 | u64 block, u32 n_block, unsigned int tf_flags, | |
747 | unsigned int tag) | |
748 | { | |
749 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
750 | tf->flags |= tf_flags; | |
751 | ||
6d1245bf | 752 | if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
bd056d7e TH |
753 | /* yay, NCQ */ |
754 | if (!lba_48_ok(block, n_block)) | |
755 | return -ERANGE; | |
756 | ||
757 | tf->protocol = ATA_PROT_NCQ; | |
758 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
759 | ||
760 | if (tf->flags & ATA_TFLAG_WRITE) | |
761 | tf->command = ATA_CMD_FPDMA_WRITE; | |
762 | else | |
763 | tf->command = ATA_CMD_FPDMA_READ; | |
764 | ||
765 | tf->nsect = tag << 3; | |
766 | tf->hob_feature = (n_block >> 8) & 0xff; | |
767 | tf->feature = n_block & 0xff; | |
768 | ||
769 | tf->hob_lbah = (block >> 40) & 0xff; | |
770 | tf->hob_lbam = (block >> 32) & 0xff; | |
771 | tf->hob_lbal = (block >> 24) & 0xff; | |
772 | tf->lbah = (block >> 16) & 0xff; | |
773 | tf->lbam = (block >> 8) & 0xff; | |
774 | tf->lbal = block & 0xff; | |
775 | ||
776 | tf->device = 1 << 6; | |
777 | if (tf->flags & ATA_TFLAG_FUA) | |
778 | tf->device |= 1 << 7; | |
779 | } else if (dev->flags & ATA_DFLAG_LBA) { | |
780 | tf->flags |= ATA_TFLAG_LBA; | |
781 | ||
782 | if (lba_28_ok(block, n_block)) { | |
783 | /* use LBA28 */ | |
784 | tf->device |= (block >> 24) & 0xf; | |
785 | } else if (lba_48_ok(block, n_block)) { | |
786 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
787 | return -ERANGE; | |
788 | ||
789 | /* use LBA48 */ | |
790 | tf->flags |= ATA_TFLAG_LBA48; | |
791 | ||
792 | tf->hob_nsect = (n_block >> 8) & 0xff; | |
793 | ||
794 | tf->hob_lbah = (block >> 40) & 0xff; | |
795 | tf->hob_lbam = (block >> 32) & 0xff; | |
796 | tf->hob_lbal = (block >> 24) & 0xff; | |
797 | } else | |
798 | /* request too large even for LBA48 */ | |
799 | return -ERANGE; | |
800 | ||
801 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
802 | return -EINVAL; | |
803 | ||
804 | tf->nsect = n_block & 0xff; | |
805 | ||
806 | tf->lbah = (block >> 16) & 0xff; | |
807 | tf->lbam = (block >> 8) & 0xff; | |
808 | tf->lbal = block & 0xff; | |
809 | ||
810 | tf->device |= ATA_LBA; | |
811 | } else { | |
812 | /* CHS */ | |
813 | u32 sect, head, cyl, track; | |
814 | ||
815 | /* The request -may- be too large for CHS addressing. */ | |
816 | if (!lba_28_ok(block, n_block)) | |
817 | return -ERANGE; | |
818 | ||
819 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
820 | return -EINVAL; | |
821 | ||
822 | /* Convert LBA to CHS */ | |
823 | track = (u32)block / dev->sectors; | |
824 | cyl = track / dev->heads; | |
825 | head = track % dev->heads; | |
826 | sect = (u32)block % dev->sectors + 1; | |
827 | ||
828 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", | |
829 | (u32)block, track, cyl, head, sect); | |
830 | ||
831 | /* Check whether the converted CHS can fit. | |
832 | Cylinder: 0-65535 | |
833 | Head: 0-15 | |
834 | Sector: 1-255*/ | |
835 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
836 | return -ERANGE; | |
837 | ||
838 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
839 | tf->lbal = sect; | |
840 | tf->lbam = cyl; | |
841 | tf->lbah = cyl >> 8; | |
842 | tf->device |= head; | |
843 | } | |
844 | ||
845 | return 0; | |
846 | } | |
847 | ||
cb95d562 TH |
848 | /** |
849 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
850 | * @pio_mask: pio_mask | |
851 | * @mwdma_mask: mwdma_mask | |
852 | * @udma_mask: udma_mask | |
853 | * | |
854 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
855 | * unsigned int xfer_mask. | |
856 | * | |
857 | * LOCKING: | |
858 | * None. | |
859 | * | |
860 | * RETURNS: | |
861 | * Packed xfer_mask. | |
862 | */ | |
7dc951ae TH |
863 | unsigned long ata_pack_xfermask(unsigned long pio_mask, |
864 | unsigned long mwdma_mask, | |
865 | unsigned long udma_mask) | |
cb95d562 TH |
866 | { |
867 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
868 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
869 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
870 | } | |
871 | ||
c0489e4e TH |
872 | /** |
873 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
874 | * @xfer_mask: xfer_mask to unpack | |
875 | * @pio_mask: resulting pio_mask | |
876 | * @mwdma_mask: resulting mwdma_mask | |
877 | * @udma_mask: resulting udma_mask | |
878 | * | |
879 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
880 | * Any NULL distination masks will be ignored. | |
881 | */ | |
7dc951ae TH |
882 | void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask, |
883 | unsigned long *mwdma_mask, unsigned long *udma_mask) | |
c0489e4e TH |
884 | { |
885 | if (pio_mask) | |
886 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
887 | if (mwdma_mask) | |
888 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
889 | if (udma_mask) | |
890 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
891 | } | |
892 | ||
cb95d562 | 893 | static const struct ata_xfer_ent { |
be9a50c8 | 894 | int shift, bits; |
cb95d562 TH |
895 | u8 base; |
896 | } ata_xfer_tbl[] = { | |
70cd071e TH |
897 | { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, |
898 | { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, | |
899 | { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, | |
cb95d562 TH |
900 | { -1, }, |
901 | }; | |
902 | ||
903 | /** | |
904 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
905 | * @xfer_mask: xfer_mask of interest | |
906 | * | |
907 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
908 | * bit of @xfer_mask is considered. | |
909 | * | |
910 | * LOCKING: | |
911 | * None. | |
912 | * | |
913 | * RETURNS: | |
70cd071e | 914 | * Matching XFER_* value, 0xff if no match found. |
cb95d562 | 915 | */ |
7dc951ae | 916 | u8 ata_xfer_mask2mode(unsigned long xfer_mask) |
cb95d562 TH |
917 | { |
918 | int highbit = fls(xfer_mask) - 1; | |
919 | const struct ata_xfer_ent *ent; | |
920 | ||
921 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
922 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
923 | return ent->base + highbit - ent->shift; | |
70cd071e | 924 | return 0xff; |
cb95d562 TH |
925 | } |
926 | ||
927 | /** | |
928 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
929 | * @xfer_mode: XFER_* of interest | |
930 | * | |
931 | * Return matching xfer_mask for @xfer_mode. | |
932 | * | |
933 | * LOCKING: | |
934 | * None. | |
935 | * | |
936 | * RETURNS: | |
937 | * Matching xfer_mask, 0 if no match found. | |
938 | */ | |
7dc951ae | 939 | unsigned long ata_xfer_mode2mask(u8 xfer_mode) |
cb95d562 TH |
940 | { |
941 | const struct ata_xfer_ent *ent; | |
942 | ||
943 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
944 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
70cd071e TH |
945 | return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) |
946 | & ~((1 << ent->shift) - 1); | |
cb95d562 TH |
947 | return 0; |
948 | } | |
949 | ||
950 | /** | |
951 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
952 | * @xfer_mode: XFER_* of interest | |
953 | * | |
954 | * Return matching xfer_shift for @xfer_mode. | |
955 | * | |
956 | * LOCKING: | |
957 | * None. | |
958 | * | |
959 | * RETURNS: | |
960 | * Matching xfer_shift, -1 if no match found. | |
961 | */ | |
7dc951ae | 962 | int ata_xfer_mode2shift(unsigned long xfer_mode) |
cb95d562 TH |
963 | { |
964 | const struct ata_xfer_ent *ent; | |
965 | ||
966 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
967 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
968 | return ent->shift; | |
969 | return -1; | |
970 | } | |
971 | ||
1da177e4 | 972 | /** |
1da7b0d0 TH |
973 | * ata_mode_string - convert xfer_mask to string |
974 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
1da177e4 LT |
975 | * |
976 | * Determine string which represents the highest speed | |
1da7b0d0 | 977 | * (highest bit in @modemask). |
1da177e4 LT |
978 | * |
979 | * LOCKING: | |
980 | * None. | |
981 | * | |
982 | * RETURNS: | |
983 | * Constant C string representing highest speed listed in | |
1da7b0d0 | 984 | * @mode_mask, or the constant C string "<n/a>". |
1da177e4 | 985 | */ |
7dc951ae | 986 | const char *ata_mode_string(unsigned long xfer_mask) |
1da177e4 | 987 | { |
75f554bc TH |
988 | static const char * const xfer_mode_str[] = { |
989 | "PIO0", | |
990 | "PIO1", | |
991 | "PIO2", | |
992 | "PIO3", | |
993 | "PIO4", | |
b352e57d AC |
994 | "PIO5", |
995 | "PIO6", | |
75f554bc TH |
996 | "MWDMA0", |
997 | "MWDMA1", | |
998 | "MWDMA2", | |
b352e57d AC |
999 | "MWDMA3", |
1000 | "MWDMA4", | |
75f554bc TH |
1001 | "UDMA/16", |
1002 | "UDMA/25", | |
1003 | "UDMA/33", | |
1004 | "UDMA/44", | |
1005 | "UDMA/66", | |
1006 | "UDMA/100", | |
1007 | "UDMA/133", | |
1008 | "UDMA7", | |
1009 | }; | |
1da7b0d0 | 1010 | int highbit; |
1da177e4 | 1011 | |
1da7b0d0 TH |
1012 | highbit = fls(xfer_mask) - 1; |
1013 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
1014 | return xfer_mode_str[highbit]; | |
1da177e4 | 1015 | return "<n/a>"; |
1da177e4 LT |
1016 | } |
1017 | ||
d9027470 | 1018 | const char *sata_spd_string(unsigned int spd) |
4c360c81 TH |
1019 | { |
1020 | static const char * const spd_str[] = { | |
1021 | "1.5 Gbps", | |
1022 | "3.0 Gbps", | |
8522ee25 | 1023 | "6.0 Gbps", |
4c360c81 TH |
1024 | }; |
1025 | ||
1026 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) | |
1027 | return "<unknown>"; | |
1028 | return spd_str[spd - 1]; | |
1029 | } | |
1030 | ||
1da177e4 LT |
1031 | /** |
1032 | * ata_dev_classify - determine device type based on ATA-spec signature | |
1033 | * @tf: ATA taskfile register set for device to be identified | |
1034 | * | |
1035 | * Determine from taskfile register contents whether a device is | |
1036 | * ATA or ATAPI, as per "Signature and persistence" section | |
1037 | * of ATA/PI spec (volume 1, sect 5.14). | |
1038 | * | |
1039 | * LOCKING: | |
1040 | * None. | |
1041 | * | |
1042 | * RETURNS: | |
633273a3 TH |
1043 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or |
1044 | * %ATA_DEV_UNKNOWN the event of failure. | |
1da177e4 | 1045 | */ |
057ace5e | 1046 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
1047 | { |
1048 | /* Apple's open source Darwin code hints that some devices only | |
1049 | * put a proper signature into the LBA mid/high registers, | |
1050 | * So, we only check those. It's sufficient for uniqueness. | |
633273a3 TH |
1051 | * |
1052 | * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate | |
1053 | * signatures for ATA and ATAPI devices attached on SerialATA, | |
1054 | * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA | |
1055 | * spec has never mentioned about using different signatures | |
1056 | * for ATA/ATAPI devices. Then, Serial ATA II: Port | |
1057 | * Multiplier specification began to use 0x69/0x96 to identify | |
1058 | * port multpliers and 0x3c/0xc3 to identify SEMB device. | |
1059 | * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and | |
1060 | * 0x69/0x96 shortly and described them as reserved for | |
1061 | * SerialATA. | |
1062 | * | |
1063 | * We follow the current spec and consider that 0x69/0x96 | |
1064 | * identifies a port multiplier and 0x3c/0xc3 a SEMB device. | |
79b42bab TH |
1065 | * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports |
1066 | * SEMB signature. This is worked around in | |
1067 | * ata_dev_read_id(). | |
1da177e4 | 1068 | */ |
633273a3 | 1069 | if ((tf->lbam == 0) && (tf->lbah == 0)) { |
1da177e4 LT |
1070 | DPRINTK("found ATA device by sig\n"); |
1071 | return ATA_DEV_ATA; | |
1072 | } | |
1073 | ||
633273a3 | 1074 | if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { |
1da177e4 LT |
1075 | DPRINTK("found ATAPI device by sig\n"); |
1076 | return ATA_DEV_ATAPI; | |
1077 | } | |
1078 | ||
633273a3 TH |
1079 | if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { |
1080 | DPRINTK("found PMP device by sig\n"); | |
1081 | return ATA_DEV_PMP; | |
1082 | } | |
1083 | ||
1084 | if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { | |
79b42bab TH |
1085 | DPRINTK("found SEMB device by sig (could be ATA device)\n"); |
1086 | return ATA_DEV_SEMB; | |
633273a3 TH |
1087 | } |
1088 | ||
1da177e4 LT |
1089 | DPRINTK("unknown device\n"); |
1090 | return ATA_DEV_UNKNOWN; | |
1091 | } | |
1092 | ||
1da177e4 | 1093 | /** |
6a62a04d | 1094 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
1095 | * @id: IDENTIFY DEVICE results we will examine |
1096 | * @s: string into which data is output | |
1097 | * @ofs: offset into identify device page | |
1098 | * @len: length of string to return. must be an even number. | |
1099 | * | |
1100 | * The strings in the IDENTIFY DEVICE page are broken up into | |
1101 | * 16-bit chunks. Run through the string, and output each | |
1102 | * 8-bit chunk linearly, regardless of platform. | |
1103 | * | |
1104 | * LOCKING: | |
1105 | * caller. | |
1106 | */ | |
1107 | ||
6a62a04d TH |
1108 | void ata_id_string(const u16 *id, unsigned char *s, |
1109 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
1110 | { |
1111 | unsigned int c; | |
1112 | ||
963e4975 AC |
1113 | BUG_ON(len & 1); |
1114 | ||
1da177e4 LT |
1115 | while (len > 0) { |
1116 | c = id[ofs] >> 8; | |
1117 | *s = c; | |
1118 | s++; | |
1119 | ||
1120 | c = id[ofs] & 0xff; | |
1121 | *s = c; | |
1122 | s++; | |
1123 | ||
1124 | ofs++; | |
1125 | len -= 2; | |
1126 | } | |
1127 | } | |
1128 | ||
0e949ff3 | 1129 | /** |
6a62a04d | 1130 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
1131 | * @id: IDENTIFY DEVICE results we will examine |
1132 | * @s: string into which data is output | |
1133 | * @ofs: offset into identify device page | |
1134 | * @len: length of string to return. must be an odd number. | |
1135 | * | |
6a62a04d | 1136 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
1137 | * trims trailing spaces and terminates the resulting string with |
1138 | * null. @len must be actual maximum length (even number) + 1. | |
1139 | * | |
1140 | * LOCKING: | |
1141 | * caller. | |
1142 | */ | |
6a62a04d TH |
1143 | void ata_id_c_string(const u16 *id, unsigned char *s, |
1144 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
1145 | { |
1146 | unsigned char *p; | |
1147 | ||
6a62a04d | 1148 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
1149 | |
1150 | p = s + strnlen(s, len - 1); | |
1151 | while (p > s && p[-1] == ' ') | |
1152 | p--; | |
1153 | *p = '\0'; | |
1154 | } | |
0baab86b | 1155 | |
db6f8759 TH |
1156 | static u64 ata_id_n_sectors(const u16 *id) |
1157 | { | |
1158 | if (ata_id_has_lba(id)) { | |
1159 | if (ata_id_has_lba48(id)) | |
968e594a | 1160 | return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); |
db6f8759 | 1161 | else |
968e594a | 1162 | return ata_id_u32(id, ATA_ID_LBA_CAPACITY); |
db6f8759 TH |
1163 | } else { |
1164 | if (ata_id_current_chs_valid(id)) | |
968e594a RH |
1165 | return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] * |
1166 | id[ATA_ID_CUR_SECTORS]; | |
db6f8759 | 1167 | else |
968e594a RH |
1168 | return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] * |
1169 | id[ATA_ID_SECTORS]; | |
db6f8759 TH |
1170 | } |
1171 | } | |
1172 | ||
a5987e0a | 1173 | u64 ata_tf_to_lba48(const struct ata_taskfile *tf) |
1e999736 AC |
1174 | { |
1175 | u64 sectors = 0; | |
1176 | ||
1177 | sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; | |
1178 | sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; | |
ba14a9c2 | 1179 | sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24; |
1e999736 AC |
1180 | sectors |= (tf->lbah & 0xff) << 16; |
1181 | sectors |= (tf->lbam & 0xff) << 8; | |
1182 | sectors |= (tf->lbal & 0xff); | |
1183 | ||
a5987e0a | 1184 | return sectors; |
1e999736 AC |
1185 | } |
1186 | ||
a5987e0a | 1187 | u64 ata_tf_to_lba(const struct ata_taskfile *tf) |
1e999736 AC |
1188 | { |
1189 | u64 sectors = 0; | |
1190 | ||
1191 | sectors |= (tf->device & 0x0f) << 24; | |
1192 | sectors |= (tf->lbah & 0xff) << 16; | |
1193 | sectors |= (tf->lbam & 0xff) << 8; | |
1194 | sectors |= (tf->lbal & 0xff); | |
1195 | ||
a5987e0a | 1196 | return sectors; |
1e999736 AC |
1197 | } |
1198 | ||
1199 | /** | |
c728a914 TH |
1200 | * ata_read_native_max_address - Read native max address |
1201 | * @dev: target device | |
1202 | * @max_sectors: out parameter for the result native max address | |
1e999736 | 1203 | * |
c728a914 TH |
1204 | * Perform an LBA48 or LBA28 native size query upon the device in |
1205 | * question. | |
1e999736 | 1206 | * |
c728a914 TH |
1207 | * RETURNS: |
1208 | * 0 on success, -EACCES if command is aborted by the drive. | |
1209 | * -EIO on other errors. | |
1e999736 | 1210 | */ |
c728a914 | 1211 | static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) |
1e999736 | 1212 | { |
c728a914 | 1213 | unsigned int err_mask; |
1e999736 | 1214 | struct ata_taskfile tf; |
c728a914 | 1215 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
1216 | |
1217 | ata_tf_init(dev, &tf); | |
1218 | ||
c728a914 | 1219 | /* always clear all address registers */ |
1e999736 | 1220 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1e999736 | 1221 | |
c728a914 TH |
1222 | if (lba48) { |
1223 | tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; | |
1224 | tf.flags |= ATA_TFLAG_LBA48; | |
1225 | } else | |
1226 | tf.command = ATA_CMD_READ_NATIVE_MAX; | |
1e999736 | 1227 | |
1e999736 | 1228 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 TH |
1229 | tf.device |= ATA_LBA; |
1230 | ||
2b789108 | 1231 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
c728a914 TH |
1232 | if (err_mask) { |
1233 | ata_dev_printk(dev, KERN_WARNING, "failed to read native " | |
1234 | "max address (err_mask=0x%x)\n", err_mask); | |
1235 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
1236 | return -EACCES; | |
1237 | return -EIO; | |
1238 | } | |
1e999736 | 1239 | |
c728a914 | 1240 | if (lba48) |
a5987e0a | 1241 | *max_sectors = ata_tf_to_lba48(&tf) + 1; |
c728a914 | 1242 | else |
a5987e0a | 1243 | *max_sectors = ata_tf_to_lba(&tf) + 1; |
2dcb407e | 1244 | if (dev->horkage & ATA_HORKAGE_HPA_SIZE) |
93328e11 | 1245 | (*max_sectors)--; |
c728a914 | 1246 | return 0; |
1e999736 AC |
1247 | } |
1248 | ||
1249 | /** | |
c728a914 TH |
1250 | * ata_set_max_sectors - Set max sectors |
1251 | * @dev: target device | |
6b38d1d1 | 1252 | * @new_sectors: new max sectors value to set for the device |
1e999736 | 1253 | * |
c728a914 TH |
1254 | * Set max sectors of @dev to @new_sectors. |
1255 | * | |
1256 | * RETURNS: | |
1257 | * 0 on success, -EACCES if command is aborted or denied (due to | |
1258 | * previous non-volatile SET_MAX) by the drive. -EIO on other | |
1259 | * errors. | |
1e999736 | 1260 | */ |
05027adc | 1261 | static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) |
1e999736 | 1262 | { |
c728a914 | 1263 | unsigned int err_mask; |
1e999736 | 1264 | struct ata_taskfile tf; |
c728a914 | 1265 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
1266 | |
1267 | new_sectors--; | |
1268 | ||
1269 | ata_tf_init(dev, &tf); | |
1270 | ||
1e999736 | 1271 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
c728a914 TH |
1272 | |
1273 | if (lba48) { | |
1274 | tf.command = ATA_CMD_SET_MAX_EXT; | |
1275 | tf.flags |= ATA_TFLAG_LBA48; | |
1276 | ||
1277 | tf.hob_lbal = (new_sectors >> 24) & 0xff; | |
1278 | tf.hob_lbam = (new_sectors >> 32) & 0xff; | |
1279 | tf.hob_lbah = (new_sectors >> 40) & 0xff; | |
1e582ba4 | 1280 | } else { |
c728a914 TH |
1281 | tf.command = ATA_CMD_SET_MAX; |
1282 | ||
1e582ba4 TH |
1283 | tf.device |= (new_sectors >> 24) & 0xf; |
1284 | } | |
1285 | ||
1e999736 | 1286 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 | 1287 | tf.device |= ATA_LBA; |
1e999736 AC |
1288 | |
1289 | tf.lbal = (new_sectors >> 0) & 0xff; | |
1290 | tf.lbam = (new_sectors >> 8) & 0xff; | |
1291 | tf.lbah = (new_sectors >> 16) & 0xff; | |
1e999736 | 1292 | |
2b789108 | 1293 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
c728a914 TH |
1294 | if (err_mask) { |
1295 | ata_dev_printk(dev, KERN_WARNING, "failed to set " | |
1296 | "max address (err_mask=0x%x)\n", err_mask); | |
1297 | if (err_mask == AC_ERR_DEV && | |
1298 | (tf.feature & (ATA_ABORTED | ATA_IDNF))) | |
1299 | return -EACCES; | |
1300 | return -EIO; | |
1301 | } | |
1302 | ||
c728a914 | 1303 | return 0; |
1e999736 AC |
1304 | } |
1305 | ||
1306 | /** | |
1307 | * ata_hpa_resize - Resize a device with an HPA set | |
1308 | * @dev: Device to resize | |
1309 | * | |
1310 | * Read the size of an LBA28 or LBA48 disk with HPA features and resize | |
1311 | * it if required to the full size of the media. The caller must check | |
1312 | * the drive has the HPA feature set enabled. | |
05027adc TH |
1313 | * |
1314 | * RETURNS: | |
1315 | * 0 on success, -errno on failure. | |
1e999736 | 1316 | */ |
05027adc | 1317 | static int ata_hpa_resize(struct ata_device *dev) |
1e999736 | 1318 | { |
05027adc TH |
1319 | struct ata_eh_context *ehc = &dev->link->eh_context; |
1320 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; | |
445d211b | 1321 | bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA; |
05027adc TH |
1322 | u64 sectors = ata_id_n_sectors(dev->id); |
1323 | u64 native_sectors; | |
c728a914 | 1324 | int rc; |
a617c09f | 1325 | |
05027adc TH |
1326 | /* do we need to do it? */ |
1327 | if (dev->class != ATA_DEV_ATA || | |
1328 | !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || | |
1329 | (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) | |
c728a914 | 1330 | return 0; |
1e999736 | 1331 | |
05027adc TH |
1332 | /* read native max address */ |
1333 | rc = ata_read_native_max_address(dev, &native_sectors); | |
1334 | if (rc) { | |
dda7aba1 TH |
1335 | /* If device aborted the command or HPA isn't going to |
1336 | * be unlocked, skip HPA resizing. | |
05027adc | 1337 | */ |
445d211b | 1338 | if (rc == -EACCES || !unlock_hpa) { |
05027adc | 1339 | ata_dev_printk(dev, KERN_WARNING, "HPA support seems " |
dda7aba1 | 1340 | "broken, skipping HPA handling\n"); |
05027adc TH |
1341 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; |
1342 | ||
1343 | /* we can continue if device aborted the command */ | |
1344 | if (rc == -EACCES) | |
1345 | rc = 0; | |
1e999736 | 1346 | } |
37301a55 | 1347 | |
05027adc TH |
1348 | return rc; |
1349 | } | |
5920dadf | 1350 | dev->n_native_sectors = native_sectors; |
05027adc TH |
1351 | |
1352 | /* nothing to do? */ | |
445d211b | 1353 | if (native_sectors <= sectors || !unlock_hpa) { |
05027adc TH |
1354 | if (!print_info || native_sectors == sectors) |
1355 | return 0; | |
1356 | ||
1357 | if (native_sectors > sectors) | |
1358 | ata_dev_printk(dev, KERN_INFO, | |
1359 | "HPA detected: current %llu, native %llu\n", | |
1360 | (unsigned long long)sectors, | |
1361 | (unsigned long long)native_sectors); | |
1362 | else if (native_sectors < sectors) | |
1363 | ata_dev_printk(dev, KERN_WARNING, | |
1364 | "native sectors (%llu) is smaller than " | |
1365 | "sectors (%llu)\n", | |
1366 | (unsigned long long)native_sectors, | |
1367 | (unsigned long long)sectors); | |
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | /* let's unlock HPA */ | |
1372 | rc = ata_set_max_sectors(dev, native_sectors); | |
1373 | if (rc == -EACCES) { | |
1374 | /* if device aborted the command, skip HPA resizing */ | |
1375 | ata_dev_printk(dev, KERN_WARNING, "device aborted resize " | |
1376 | "(%llu -> %llu), skipping HPA handling\n", | |
1377 | (unsigned long long)sectors, | |
1378 | (unsigned long long)native_sectors); | |
1379 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; | |
1380 | return 0; | |
1381 | } else if (rc) | |
1382 | return rc; | |
1383 | ||
1384 | /* re-read IDENTIFY data */ | |
1385 | rc = ata_dev_reread_id(dev, 0); | |
1386 | if (rc) { | |
1387 | ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY " | |
1388 | "data after HPA resizing\n"); | |
1389 | return rc; | |
1390 | } | |
1391 | ||
1392 | if (print_info) { | |
1393 | u64 new_sectors = ata_id_n_sectors(dev->id); | |
1394 | ata_dev_printk(dev, KERN_INFO, | |
1395 | "HPA unlocked: %llu -> %llu, native %llu\n", | |
1396 | (unsigned long long)sectors, | |
1397 | (unsigned long long)new_sectors, | |
1398 | (unsigned long long)native_sectors); | |
1399 | } | |
1400 | ||
1401 | return 0; | |
1e999736 AC |
1402 | } |
1403 | ||
1da177e4 LT |
1404 | /** |
1405 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 1406 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 1407 | * |
0bd3300a TH |
1408 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
1409 | * page. | |
1da177e4 LT |
1410 | * |
1411 | * LOCKING: | |
1412 | * caller. | |
1413 | */ | |
1414 | ||
0bd3300a | 1415 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
1416 | { |
1417 | DPRINTK("49==0x%04x " | |
1418 | "53==0x%04x " | |
1419 | "63==0x%04x " | |
1420 | "64==0x%04x " | |
1421 | "75==0x%04x \n", | |
0bd3300a TH |
1422 | id[49], |
1423 | id[53], | |
1424 | id[63], | |
1425 | id[64], | |
1426 | id[75]); | |
1da177e4 LT |
1427 | DPRINTK("80==0x%04x " |
1428 | "81==0x%04x " | |
1429 | "82==0x%04x " | |
1430 | "83==0x%04x " | |
1431 | "84==0x%04x \n", | |
0bd3300a TH |
1432 | id[80], |
1433 | id[81], | |
1434 | id[82], | |
1435 | id[83], | |
1436 | id[84]); | |
1da177e4 LT |
1437 | DPRINTK("88==0x%04x " |
1438 | "93==0x%04x\n", | |
0bd3300a TH |
1439 | id[88], |
1440 | id[93]); | |
1da177e4 LT |
1441 | } |
1442 | ||
cb95d562 TH |
1443 | /** |
1444 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
1445 | * @id: IDENTIFY data to compute xfer mask from | |
1446 | * | |
1447 | * Compute the xfermask for this device. This is not as trivial | |
1448 | * as it seems if we must consider early devices correctly. | |
1449 | * | |
1450 | * FIXME: pre IDE drive timing (do we care ?). | |
1451 | * | |
1452 | * LOCKING: | |
1453 | * None. | |
1454 | * | |
1455 | * RETURNS: | |
1456 | * Computed xfermask | |
1457 | */ | |
7dc951ae | 1458 | unsigned long ata_id_xfermask(const u16 *id) |
cb95d562 | 1459 | { |
7dc951ae | 1460 | unsigned long pio_mask, mwdma_mask, udma_mask; |
cb95d562 TH |
1461 | |
1462 | /* Usual case. Word 53 indicates word 64 is valid */ | |
1463 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
1464 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
1465 | pio_mask <<= 3; | |
1466 | pio_mask |= 0x7; | |
1467 | } else { | |
1468 | /* If word 64 isn't valid then Word 51 high byte holds | |
1469 | * the PIO timing number for the maximum. Turn it into | |
1470 | * a mask. | |
1471 | */ | |
7a0f1c8a | 1472 | u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
46767aeb | 1473 | if (mode < 5) /* Valid PIO range */ |
2dcb407e | 1474 | pio_mask = (2 << mode) - 1; |
46767aeb AC |
1475 | else |
1476 | pio_mask = 1; | |
cb95d562 TH |
1477 | |
1478 | /* But wait.. there's more. Design your standards by | |
1479 | * committee and you too can get a free iordy field to | |
1480 | * process. However its the speeds not the modes that | |
1481 | * are supported... Note drivers using the timing API | |
1482 | * will get this right anyway | |
1483 | */ | |
1484 | } | |
1485 | ||
1486 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
fb21f0d0 | 1487 | |
b352e57d AC |
1488 | if (ata_id_is_cfa(id)) { |
1489 | /* | |
1490 | * Process compact flash extended modes | |
1491 | */ | |
62afe5d7 SS |
1492 | int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7; |
1493 | int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7; | |
b352e57d AC |
1494 | |
1495 | if (pio) | |
1496 | pio_mask |= (1 << 5); | |
1497 | if (pio > 1) | |
1498 | pio_mask |= (1 << 6); | |
1499 | if (dma) | |
1500 | mwdma_mask |= (1 << 3); | |
1501 | if (dma > 1) | |
1502 | mwdma_mask |= (1 << 4); | |
1503 | } | |
1504 | ||
fb21f0d0 TH |
1505 | udma_mask = 0; |
1506 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
1507 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
cb95d562 TH |
1508 | |
1509 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
1510 | } | |
1511 | ||
7102d230 | 1512 | static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 1513 | { |
77853bf2 | 1514 | struct completion *waiting = qc->private_data; |
a2a7a662 | 1515 | |
a2a7a662 | 1516 | complete(waiting); |
a2a7a662 TH |
1517 | } |
1518 | ||
1519 | /** | |
2432697b | 1520 | * ata_exec_internal_sg - execute libata internal command |
a2a7a662 TH |
1521 | * @dev: Device to which the command is sent |
1522 | * @tf: Taskfile registers for the command and the result | |
d69cf37d | 1523 | * @cdb: CDB for packet command |
a2a7a662 | 1524 | * @dma_dir: Data tranfer direction of the command |
5c1ad8b3 | 1525 | * @sgl: sg list for the data buffer of the command |
2432697b | 1526 | * @n_elem: Number of sg entries |
2b789108 | 1527 | * @timeout: Timeout in msecs (0 for default) |
a2a7a662 TH |
1528 | * |
1529 | * Executes libata internal command with timeout. @tf contains | |
1530 | * command on entry and result on return. Timeout and error | |
1531 | * conditions are reported via return value. No recovery action | |
1532 | * is taken after a command times out. It's caller's duty to | |
1533 | * clean up after timeout. | |
1534 | * | |
1535 | * LOCKING: | |
1536 | * None. Should be called with kernel context, might sleep. | |
551e8889 TH |
1537 | * |
1538 | * RETURNS: | |
1539 | * Zero on success, AC_ERR_* mask on failure | |
a2a7a662 | 1540 | */ |
2432697b TH |
1541 | unsigned ata_exec_internal_sg(struct ata_device *dev, |
1542 | struct ata_taskfile *tf, const u8 *cdb, | |
87260216 | 1543 | int dma_dir, struct scatterlist *sgl, |
2b789108 | 1544 | unsigned int n_elem, unsigned long timeout) |
a2a7a662 | 1545 | { |
9af5c9c9 TH |
1546 | struct ata_link *link = dev->link; |
1547 | struct ata_port *ap = link->ap; | |
a2a7a662 | 1548 | u8 command = tf->command; |
87fbc5a0 | 1549 | int auto_timeout = 0; |
a2a7a662 | 1550 | struct ata_queued_cmd *qc; |
2ab7db1f | 1551 | unsigned int tag, preempted_tag; |
dedaf2b0 | 1552 | u32 preempted_sactive, preempted_qc_active; |
da917d69 | 1553 | int preempted_nr_active_links; |
60be6b9a | 1554 | DECLARE_COMPLETION_ONSTACK(wait); |
a2a7a662 | 1555 | unsigned long flags; |
77853bf2 | 1556 | unsigned int err_mask; |
d95a717f | 1557 | int rc; |
a2a7a662 | 1558 | |
ba6a1308 | 1559 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 | 1560 | |
e3180499 | 1561 | /* no internal command while frozen */ |
b51e9e5d | 1562 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
ba6a1308 | 1563 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1564 | return AC_ERR_SYSTEM; |
1565 | } | |
1566 | ||
2ab7db1f | 1567 | /* initialize internal qc */ |
a2a7a662 | 1568 | |
2ab7db1f TH |
1569 | /* XXX: Tag 0 is used for drivers with legacy EH as some |
1570 | * drivers choke if any other tag is given. This breaks | |
1571 | * ata_tag_internal() test for those drivers. Don't use new | |
1572 | * EH stuff without converting to it. | |
1573 | */ | |
1574 | if (ap->ops->error_handler) | |
1575 | tag = ATA_TAG_INTERNAL; | |
1576 | else | |
1577 | tag = 0; | |
1578 | ||
8a8bc223 TH |
1579 | if (test_and_set_bit(tag, &ap->qc_allocated)) |
1580 | BUG(); | |
f69499f4 | 1581 | qc = __ata_qc_from_tag(ap, tag); |
2ab7db1f TH |
1582 | |
1583 | qc->tag = tag; | |
1584 | qc->scsicmd = NULL; | |
1585 | qc->ap = ap; | |
1586 | qc->dev = dev; | |
1587 | ata_qc_reinit(qc); | |
1588 | ||
9af5c9c9 TH |
1589 | preempted_tag = link->active_tag; |
1590 | preempted_sactive = link->sactive; | |
dedaf2b0 | 1591 | preempted_qc_active = ap->qc_active; |
da917d69 | 1592 | preempted_nr_active_links = ap->nr_active_links; |
9af5c9c9 TH |
1593 | link->active_tag = ATA_TAG_POISON; |
1594 | link->sactive = 0; | |
dedaf2b0 | 1595 | ap->qc_active = 0; |
da917d69 | 1596 | ap->nr_active_links = 0; |
2ab7db1f TH |
1597 | |
1598 | /* prepare & issue qc */ | |
a2a7a662 | 1599 | qc->tf = *tf; |
d69cf37d TH |
1600 | if (cdb) |
1601 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); | |
e61e0672 | 1602 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
a2a7a662 TH |
1603 | qc->dma_dir = dma_dir; |
1604 | if (dma_dir != DMA_NONE) { | |
2432697b | 1605 | unsigned int i, buflen = 0; |
87260216 | 1606 | struct scatterlist *sg; |
2432697b | 1607 | |
87260216 JA |
1608 | for_each_sg(sgl, sg, n_elem, i) |
1609 | buflen += sg->length; | |
2432697b | 1610 | |
87260216 | 1611 | ata_sg_init(qc, sgl, n_elem); |
49c80429 | 1612 | qc->nbytes = buflen; |
a2a7a662 TH |
1613 | } |
1614 | ||
77853bf2 | 1615 | qc->private_data = &wait; |
a2a7a662 TH |
1616 | qc->complete_fn = ata_qc_complete_internal; |
1617 | ||
8e0e694a | 1618 | ata_qc_issue(qc); |
a2a7a662 | 1619 | |
ba6a1308 | 1620 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 | 1621 | |
87fbc5a0 TH |
1622 | if (!timeout) { |
1623 | if (ata_probe_timeout) | |
1624 | timeout = ata_probe_timeout * 1000; | |
1625 | else { | |
1626 | timeout = ata_internal_cmd_timeout(dev, command); | |
1627 | auto_timeout = 1; | |
1628 | } | |
1629 | } | |
2b789108 TH |
1630 | |
1631 | rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); | |
d95a717f | 1632 | |
c429137a | 1633 | ata_sff_flush_pio_task(ap); |
41ade50c | 1634 | |
d95a717f | 1635 | if (!rc) { |
ba6a1308 | 1636 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 TH |
1637 | |
1638 | /* We're racing with irq here. If we lose, the | |
1639 | * following test prevents us from completing the qc | |
d95a717f TH |
1640 | * twice. If we win, the port is frozen and will be |
1641 | * cleaned up by ->post_internal_cmd(). | |
a2a7a662 | 1642 | */ |
77853bf2 | 1643 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
d95a717f TH |
1644 | qc->err_mask |= AC_ERR_TIMEOUT; |
1645 | ||
1646 | if (ap->ops->error_handler) | |
1647 | ata_port_freeze(ap); | |
1648 | else | |
1649 | ata_qc_complete(qc); | |
f15a1daf | 1650 | |
0dd4b21f BP |
1651 | if (ata_msg_warn(ap)) |
1652 | ata_dev_printk(dev, KERN_WARNING, | |
88574551 | 1653 | "qc timeout (cmd 0x%x)\n", command); |
a2a7a662 TH |
1654 | } |
1655 | ||
ba6a1308 | 1656 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 TH |
1657 | } |
1658 | ||
d95a717f TH |
1659 | /* do post_internal_cmd */ |
1660 | if (ap->ops->post_internal_cmd) | |
1661 | ap->ops->post_internal_cmd(qc); | |
1662 | ||
a51d644a TH |
1663 | /* perform minimal error analysis */ |
1664 | if (qc->flags & ATA_QCFLAG_FAILED) { | |
1665 | if (qc->result_tf.command & (ATA_ERR | ATA_DF)) | |
1666 | qc->err_mask |= AC_ERR_DEV; | |
1667 | ||
1668 | if (!qc->err_mask) | |
1669 | qc->err_mask |= AC_ERR_OTHER; | |
1670 | ||
1671 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1672 | qc->err_mask &= ~AC_ERR_OTHER; | |
d95a717f TH |
1673 | } |
1674 | ||
15869303 | 1675 | /* finish up */ |
ba6a1308 | 1676 | spin_lock_irqsave(ap->lock, flags); |
15869303 | 1677 | |
e61e0672 | 1678 | *tf = qc->result_tf; |
77853bf2 TH |
1679 | err_mask = qc->err_mask; |
1680 | ||
1681 | ata_qc_free(qc); | |
9af5c9c9 TH |
1682 | link->active_tag = preempted_tag; |
1683 | link->sactive = preempted_sactive; | |
dedaf2b0 | 1684 | ap->qc_active = preempted_qc_active; |
da917d69 | 1685 | ap->nr_active_links = preempted_nr_active_links; |
77853bf2 | 1686 | |
ba6a1308 | 1687 | spin_unlock_irqrestore(ap->lock, flags); |
15869303 | 1688 | |
87fbc5a0 TH |
1689 | if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout) |
1690 | ata_internal_cmd_timed_out(dev, command); | |
1691 | ||
77853bf2 | 1692 | return err_mask; |
a2a7a662 TH |
1693 | } |
1694 | ||
2432697b | 1695 | /** |
33480a0e | 1696 | * ata_exec_internal - execute libata internal command |
2432697b TH |
1697 | * @dev: Device to which the command is sent |
1698 | * @tf: Taskfile registers for the command and the result | |
1699 | * @cdb: CDB for packet command | |
1700 | * @dma_dir: Data tranfer direction of the command | |
1701 | * @buf: Data buffer of the command | |
1702 | * @buflen: Length of data buffer | |
2b789108 | 1703 | * @timeout: Timeout in msecs (0 for default) |
2432697b TH |
1704 | * |
1705 | * Wrapper around ata_exec_internal_sg() which takes simple | |
1706 | * buffer instead of sg list. | |
1707 | * | |
1708 | * LOCKING: | |
1709 | * None. Should be called with kernel context, might sleep. | |
1710 | * | |
1711 | * RETURNS: | |
1712 | * Zero on success, AC_ERR_* mask on failure | |
1713 | */ | |
1714 | unsigned ata_exec_internal(struct ata_device *dev, | |
1715 | struct ata_taskfile *tf, const u8 *cdb, | |
2b789108 TH |
1716 | int dma_dir, void *buf, unsigned int buflen, |
1717 | unsigned long timeout) | |
2432697b | 1718 | { |
33480a0e TH |
1719 | struct scatterlist *psg = NULL, sg; |
1720 | unsigned int n_elem = 0; | |
2432697b | 1721 | |
33480a0e TH |
1722 | if (dma_dir != DMA_NONE) { |
1723 | WARN_ON(!buf); | |
1724 | sg_init_one(&sg, buf, buflen); | |
1725 | psg = &sg; | |
1726 | n_elem++; | |
1727 | } | |
2432697b | 1728 | |
2b789108 TH |
1729 | return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, |
1730 | timeout); | |
2432697b TH |
1731 | } |
1732 | ||
977e6b9f TH |
1733 | /** |
1734 | * ata_do_simple_cmd - execute simple internal command | |
1735 | * @dev: Device to which the command is sent | |
1736 | * @cmd: Opcode to execute | |
1737 | * | |
1738 | * Execute a 'simple' command, that only consists of the opcode | |
1739 | * 'cmd' itself, without filling any other registers | |
1740 | * | |
1741 | * LOCKING: | |
1742 | * Kernel thread context (may sleep). | |
1743 | * | |
1744 | * RETURNS: | |
1745 | * Zero on success, AC_ERR_* mask on failure | |
e58eb583 | 1746 | */ |
77b08fb5 | 1747 | unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
e58eb583 TH |
1748 | { |
1749 | struct ata_taskfile tf; | |
e58eb583 TH |
1750 | |
1751 | ata_tf_init(dev, &tf); | |
1752 | ||
1753 | tf.command = cmd; | |
1754 | tf.flags |= ATA_TFLAG_DEVICE; | |
1755 | tf.protocol = ATA_PROT_NODATA; | |
1756 | ||
2b789108 | 1757 | return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
e58eb583 TH |
1758 | } |
1759 | ||
1bc4ccff AC |
1760 | /** |
1761 | * ata_pio_need_iordy - check if iordy needed | |
1762 | * @adev: ATA device | |
1763 | * | |
1764 | * Check if the current speed of the device requires IORDY. Used | |
1765 | * by various controllers for chip configuration. | |
1766 | */ | |
1bc4ccff AC |
1767 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
1768 | { | |
0d9e6659 TH |
1769 | /* Don't set IORDY if we're preparing for reset. IORDY may |
1770 | * lead to controller lock up on certain controllers if the | |
1771 | * port is not occupied. See bko#11703 for details. | |
1772 | */ | |
1773 | if (adev->link->ap->pflags & ATA_PFLAG_RESETTING) | |
1774 | return 0; | |
1775 | /* Controller doesn't support IORDY. Probably a pointless | |
1776 | * check as the caller should know this. | |
1777 | */ | |
9af5c9c9 | 1778 | if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) |
1bc4ccff | 1779 | return 0; |
5c18c4d2 DD |
1780 | /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */ |
1781 | if (ata_id_is_cfa(adev->id) | |
1782 | && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6)) | |
1783 | return 0; | |
432729f0 AC |
1784 | /* PIO3 and higher it is mandatory */ |
1785 | if (adev->pio_mode > XFER_PIO_2) | |
1786 | return 1; | |
1787 | /* We turn it on when possible */ | |
1788 | if (ata_id_has_iordy(adev->id)) | |
1bc4ccff | 1789 | return 1; |
432729f0 AC |
1790 | return 0; |
1791 | } | |
2e9edbf8 | 1792 | |
432729f0 AC |
1793 | /** |
1794 | * ata_pio_mask_no_iordy - Return the non IORDY mask | |
1795 | * @adev: ATA device | |
1796 | * | |
1797 | * Compute the highest mode possible if we are not using iordy. Return | |
1798 | * -1 if no iordy mode is available. | |
1799 | */ | |
432729f0 AC |
1800 | static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) |
1801 | { | |
1bc4ccff | 1802 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
1bc4ccff | 1803 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
432729f0 | 1804 | u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
1bc4ccff AC |
1805 | /* Is the speed faster than the drive allows non IORDY ? */ |
1806 | if (pio) { | |
1807 | /* This is cycle times not frequency - watch the logic! */ | |
1808 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
432729f0 AC |
1809 | return 3 << ATA_SHIFT_PIO; |
1810 | return 7 << ATA_SHIFT_PIO; | |
1bc4ccff AC |
1811 | } |
1812 | } | |
432729f0 | 1813 | return 3 << ATA_SHIFT_PIO; |
1bc4ccff AC |
1814 | } |
1815 | ||
963e4975 AC |
1816 | /** |
1817 | * ata_do_dev_read_id - default ID read method | |
1818 | * @dev: device | |
1819 | * @tf: proposed taskfile | |
1820 | * @id: data buffer | |
1821 | * | |
1822 | * Issue the identify taskfile and hand back the buffer containing | |
1823 | * identify data. For some RAID controllers and for pre ATA devices | |
1824 | * this function is wrapped or replaced by the driver | |
1825 | */ | |
1826 | unsigned int ata_do_dev_read_id(struct ata_device *dev, | |
1827 | struct ata_taskfile *tf, u16 *id) | |
1828 | { | |
1829 | return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE, | |
1830 | id, sizeof(id[0]) * ATA_ID_WORDS, 0); | |
1831 | } | |
1832 | ||
1da177e4 | 1833 | /** |
49016aca | 1834 | * ata_dev_read_id - Read ID data from the specified device |
49016aca TH |
1835 | * @dev: target device |
1836 | * @p_class: pointer to class of the target device (may be changed) | |
bff04647 | 1837 | * @flags: ATA_READID_* flags |
fe635c7e | 1838 | * @id: buffer to read IDENTIFY data into |
1da177e4 | 1839 | * |
49016aca TH |
1840 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
1841 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
aec5c3c1 TH |
1842 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
1843 | * for pre-ATA4 drives. | |
1da177e4 | 1844 | * |
50a99018 | 1845 | * FIXME: ATA_CMD_ID_ATA is optional for early drives and right |
2dcb407e | 1846 | * now we abort if we hit that case. |
50a99018 | 1847 | * |
1da177e4 | 1848 | * LOCKING: |
49016aca TH |
1849 | * Kernel thread context (may sleep) |
1850 | * | |
1851 | * RETURNS: | |
1852 | * 0 on success, -errno otherwise. | |
1da177e4 | 1853 | */ |
a9beec95 | 1854 | int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, |
bff04647 | 1855 | unsigned int flags, u16 *id) |
1da177e4 | 1856 | { |
9af5c9c9 | 1857 | struct ata_port *ap = dev->link->ap; |
49016aca | 1858 | unsigned int class = *p_class; |
a0123703 | 1859 | struct ata_taskfile tf; |
49016aca TH |
1860 | unsigned int err_mask = 0; |
1861 | const char *reason; | |
79b42bab | 1862 | bool is_semb = class == ATA_DEV_SEMB; |
54936f8b | 1863 | int may_fallback = 1, tried_spinup = 0; |
49016aca | 1864 | int rc; |
1da177e4 | 1865 | |
0dd4b21f | 1866 | if (ata_msg_ctl(ap)) |
7f5e4e8d | 1867 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); |
1da177e4 | 1868 | |
963e4975 | 1869 | retry: |
3373efd8 | 1870 | ata_tf_init(dev, &tf); |
a0123703 | 1871 | |
49016aca | 1872 | switch (class) { |
79b42bab TH |
1873 | case ATA_DEV_SEMB: |
1874 | class = ATA_DEV_ATA; /* some hard drives report SEMB sig */ | |
49016aca | 1875 | case ATA_DEV_ATA: |
a0123703 | 1876 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
1877 | break; |
1878 | case ATA_DEV_ATAPI: | |
a0123703 | 1879 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
1880 | break; |
1881 | default: | |
1882 | rc = -ENODEV; | |
1883 | reason = "unsupported class"; | |
1884 | goto err_out; | |
1da177e4 LT |
1885 | } |
1886 | ||
a0123703 | 1887 | tf.protocol = ATA_PROT_PIO; |
81afe893 TH |
1888 | |
1889 | /* Some devices choke if TF registers contain garbage. Make | |
1890 | * sure those are properly initialized. | |
1891 | */ | |
1892 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1893 | ||
1894 | /* Device presence detection is unreliable on some | |
1895 | * controllers. Always poll IDENTIFY if available. | |
1896 | */ | |
1897 | tf.flags |= ATA_TFLAG_POLLING; | |
1da177e4 | 1898 | |
963e4975 AC |
1899 | if (ap->ops->read_id) |
1900 | err_mask = ap->ops->read_id(dev, &tf, id); | |
1901 | else | |
1902 | err_mask = ata_do_dev_read_id(dev, &tf, id); | |
1903 | ||
a0123703 | 1904 | if (err_mask) { |
800b3996 | 1905 | if (err_mask & AC_ERR_NODEV_HINT) { |
1ffc151f TH |
1906 | ata_dev_printk(dev, KERN_DEBUG, |
1907 | "NODEV after polling detection\n"); | |
55a8e2c8 TH |
1908 | return -ENOENT; |
1909 | } | |
1910 | ||
79b42bab TH |
1911 | if (is_semb) { |
1912 | ata_dev_printk(dev, KERN_INFO, "IDENTIFY failed on " | |
1913 | "device w/ SEMB sig, disabled\n"); | |
1914 | /* SEMB is not supported yet */ | |
1915 | *p_class = ATA_DEV_SEMB_UNSUP; | |
1916 | return 0; | |
1917 | } | |
1918 | ||
1ffc151f TH |
1919 | if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { |
1920 | /* Device or controller might have reported | |
1921 | * the wrong device class. Give a shot at the | |
1922 | * other IDENTIFY if the current one is | |
1923 | * aborted by the device. | |
1924 | */ | |
1925 | if (may_fallback) { | |
1926 | may_fallback = 0; | |
1927 | ||
1928 | if (class == ATA_DEV_ATA) | |
1929 | class = ATA_DEV_ATAPI; | |
1930 | else | |
1931 | class = ATA_DEV_ATA; | |
1932 | goto retry; | |
1933 | } | |
1934 | ||
1935 | /* Control reaches here iff the device aborted | |
1936 | * both flavors of IDENTIFYs which happens | |
1937 | * sometimes with phantom devices. | |
1938 | */ | |
1939 | ata_dev_printk(dev, KERN_DEBUG, | |
1940 | "both IDENTIFYs aborted, assuming NODEV\n"); | |
1941 | return -ENOENT; | |
54936f8b TH |
1942 | } |
1943 | ||
49016aca TH |
1944 | rc = -EIO; |
1945 | reason = "I/O error"; | |
1da177e4 LT |
1946 | goto err_out; |
1947 | } | |
1948 | ||
43c9c591 TH |
1949 | if (dev->horkage & ATA_HORKAGE_DUMP_ID) { |
1950 | ata_dev_printk(dev, KERN_DEBUG, "dumping IDENTIFY data, " | |
1951 | "class=%d may_fallback=%d tried_spinup=%d\n", | |
1952 | class, may_fallback, tried_spinup); | |
1953 | print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, | |
1954 | 16, 2, id, ATA_ID_WORDS * sizeof(*id), true); | |
1955 | } | |
1956 | ||
54936f8b TH |
1957 | /* Falling back doesn't make sense if ID data was read |
1958 | * successfully at least once. | |
1959 | */ | |
1960 | may_fallback = 0; | |
1961 | ||
49016aca | 1962 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 | 1963 | |
49016aca | 1964 | /* sanity check */ |
a4f5749b | 1965 | rc = -EINVAL; |
6070068b | 1966 | reason = "device reports invalid type"; |
a4f5749b TH |
1967 | |
1968 | if (class == ATA_DEV_ATA) { | |
1969 | if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) | |
1970 | goto err_out; | |
1971 | } else { | |
1972 | if (ata_id_is_ata(id)) | |
1973 | goto err_out; | |
49016aca TH |
1974 | } |
1975 | ||
169439c2 ML |
1976 | if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { |
1977 | tried_spinup = 1; | |
1978 | /* | |
1979 | * Drive powered-up in standby mode, and requires a specific | |
1980 | * SET_FEATURES spin-up subcommand before it will accept | |
1981 | * anything other than the original IDENTIFY command. | |
1982 | */ | |
218f3d30 | 1983 | err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); |
fb0582f9 | 1984 | if (err_mask && id[2] != 0x738c) { |
169439c2 ML |
1985 | rc = -EIO; |
1986 | reason = "SPINUP failed"; | |
1987 | goto err_out; | |
1988 | } | |
1989 | /* | |
1990 | * If the drive initially returned incomplete IDENTIFY info, | |
1991 | * we now must reissue the IDENTIFY command. | |
1992 | */ | |
1993 | if (id[2] == 0x37c8) | |
1994 | goto retry; | |
1995 | } | |
1996 | ||
bff04647 | 1997 | if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { |
49016aca TH |
1998 | /* |
1999 | * The exact sequence expected by certain pre-ATA4 drives is: | |
2000 | * SRST RESET | |
50a99018 AC |
2001 | * IDENTIFY (optional in early ATA) |
2002 | * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) | |
49016aca TH |
2003 | * anything else.. |
2004 | * Some drives were very specific about that exact sequence. | |
50a99018 AC |
2005 | * |
2006 | * Note that ATA4 says lba is mandatory so the second check | |
c9404c9c | 2007 | * should never trigger. |
49016aca TH |
2008 | */ |
2009 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
3373efd8 | 2010 | err_mask = ata_dev_init_params(dev, id[3], id[6]); |
49016aca TH |
2011 | if (err_mask) { |
2012 | rc = -EIO; | |
2013 | reason = "INIT_DEV_PARAMS failed"; | |
2014 | goto err_out; | |
2015 | } | |
2016 | ||
2017 | /* current CHS translation info (id[53-58]) might be | |
2018 | * changed. reread the identify device info. | |
2019 | */ | |
bff04647 | 2020 | flags &= ~ATA_READID_POSTRESET; |
49016aca TH |
2021 | goto retry; |
2022 | } | |
2023 | } | |
2024 | ||
2025 | *p_class = class; | |
fe635c7e | 2026 | |
49016aca TH |
2027 | return 0; |
2028 | ||
2029 | err_out: | |
88574551 | 2030 | if (ata_msg_warn(ap)) |
0dd4b21f | 2031 | ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
88574551 | 2032 | "(%s, err_mask=0x%x)\n", reason, err_mask); |
49016aca TH |
2033 | return rc; |
2034 | } | |
2035 | ||
9062712f TH |
2036 | static int ata_do_link_spd_horkage(struct ata_device *dev) |
2037 | { | |
2038 | struct ata_link *plink = ata_dev_phys_link(dev); | |
2039 | u32 target, target_limit; | |
2040 | ||
2041 | if (!sata_scr_valid(plink)) | |
2042 | return 0; | |
2043 | ||
2044 | if (dev->horkage & ATA_HORKAGE_1_5_GBPS) | |
2045 | target = 1; | |
2046 | else | |
2047 | return 0; | |
2048 | ||
2049 | target_limit = (1 << target) - 1; | |
2050 | ||
2051 | /* if already on stricter limit, no need to push further */ | |
2052 | if (plink->sata_spd_limit <= target_limit) | |
2053 | return 0; | |
2054 | ||
2055 | plink->sata_spd_limit = target_limit; | |
2056 | ||
2057 | /* Request another EH round by returning -EAGAIN if link is | |
2058 | * going faster than the target speed. Forward progress is | |
2059 | * guaranteed by setting sata_spd_limit to target_limit above. | |
2060 | */ | |
2061 | if (plink->sata_spd > target) { | |
2062 | ata_dev_printk(dev, KERN_INFO, | |
2063 | "applying link speed limit horkage to %s\n", | |
2064 | sata_spd_string(target)); | |
2065 | return -EAGAIN; | |
2066 | } | |
2067 | return 0; | |
2068 | } | |
2069 | ||
3373efd8 | 2070 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
4b2f3ede | 2071 | { |
9af5c9c9 | 2072 | struct ata_port *ap = dev->link->ap; |
9ce8e307 JA |
2073 | |
2074 | if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK) | |
2075 | return 0; | |
2076 | ||
9af5c9c9 | 2077 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); |
4b2f3ede TH |
2078 | } |
2079 | ||
388539f3 | 2080 | static int ata_dev_config_ncq(struct ata_device *dev, |
a6e6ce8e TH |
2081 | char *desc, size_t desc_sz) |
2082 | { | |
9af5c9c9 | 2083 | struct ata_port *ap = dev->link->ap; |
a6e6ce8e | 2084 | int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); |
388539f3 SL |
2085 | unsigned int err_mask; |
2086 | char *aa_desc = ""; | |
a6e6ce8e TH |
2087 | |
2088 | if (!ata_id_has_ncq(dev->id)) { | |
2089 | desc[0] = '\0'; | |
388539f3 | 2090 | return 0; |
a6e6ce8e | 2091 | } |
75683fe7 | 2092 | if (dev->horkage & ATA_HORKAGE_NONCQ) { |
6919a0a6 | 2093 | snprintf(desc, desc_sz, "NCQ (not used)"); |
388539f3 | 2094 | return 0; |
6919a0a6 | 2095 | } |
a6e6ce8e | 2096 | if (ap->flags & ATA_FLAG_NCQ) { |
cca3974e | 2097 | hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
a6e6ce8e TH |
2098 | dev->flags |= ATA_DFLAG_NCQ; |
2099 | } | |
2100 | ||
388539f3 SL |
2101 | if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) && |
2102 | (ap->flags & ATA_FLAG_FPDMA_AA) && | |
2103 | ata_id_has_fpdma_aa(dev->id)) { | |
2104 | err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE, | |
2105 | SATA_FPDMA_AA); | |
2106 | if (err_mask) { | |
2107 | ata_dev_printk(dev, KERN_ERR, "failed to enable AA" | |
2108 | "(error_mask=0x%x)\n", err_mask); | |
2109 | if (err_mask != AC_ERR_DEV) { | |
2110 | dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA; | |
2111 | return -EIO; | |
2112 | } | |
2113 | } else | |
2114 | aa_desc = ", AA"; | |
2115 | } | |
2116 | ||
a6e6ce8e | 2117 | if (hdepth >= ddepth) |
388539f3 | 2118 | snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc); |
a6e6ce8e | 2119 | else |
388539f3 SL |
2120 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth, |
2121 | ddepth, aa_desc); | |
2122 | return 0; | |
a6e6ce8e TH |
2123 | } |
2124 | ||
49016aca | 2125 | /** |
ffeae418 | 2126 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
ffeae418 TH |
2127 | * @dev: Target device to configure |
2128 | * | |
2129 | * Configure @dev according to @dev->id. Generic and low-level | |
2130 | * driver specific fixups are also applied. | |
49016aca TH |
2131 | * |
2132 | * LOCKING: | |
ffeae418 TH |
2133 | * Kernel thread context (may sleep) |
2134 | * | |
2135 | * RETURNS: | |
2136 | * 0 on success, -errno otherwise | |
49016aca | 2137 | */ |
efdaedc4 | 2138 | int ata_dev_configure(struct ata_device *dev) |
49016aca | 2139 | { |
9af5c9c9 TH |
2140 | struct ata_port *ap = dev->link->ap; |
2141 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
6746544c | 2142 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
1148c3a7 | 2143 | const u16 *id = dev->id; |
7dc951ae | 2144 | unsigned long xfer_mask; |
b352e57d | 2145 | char revbuf[7]; /* XYZ-99\0 */ |
3f64f565 EM |
2146 | char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
2147 | char modelbuf[ATA_ID_PROD_LEN+1]; | |
e6d902a3 | 2148 | int rc; |
49016aca | 2149 | |
0dd4b21f | 2150 | if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
44877b4e | 2151 | ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", |
7f5e4e8d | 2152 | __func__); |
ffeae418 | 2153 | return 0; |
49016aca TH |
2154 | } |
2155 | ||
0dd4b21f | 2156 | if (ata_msg_probe(ap)) |
7f5e4e8d | 2157 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); |
1da177e4 | 2158 | |
75683fe7 TH |
2159 | /* set horkage */ |
2160 | dev->horkage |= ata_dev_blacklisted(dev); | |
33267325 | 2161 | ata_force_horkage(dev); |
75683fe7 | 2162 | |
50af2fa1 TH |
2163 | if (dev->horkage & ATA_HORKAGE_DISABLE) { |
2164 | ata_dev_printk(dev, KERN_INFO, | |
2165 | "unsupported device, disabling\n"); | |
2166 | ata_dev_disable(dev); | |
2167 | return 0; | |
2168 | } | |
2169 | ||
2486fa56 TH |
2170 | if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) && |
2171 | dev->class == ATA_DEV_ATAPI) { | |
2172 | ata_dev_printk(dev, KERN_WARNING, | |
2173 | "WARNING: ATAPI is %s, device ignored.\n", | |
2174 | atapi_enabled ? "not supported with this driver" | |
2175 | : "disabled"); | |
2176 | ata_dev_disable(dev); | |
2177 | return 0; | |
2178 | } | |
2179 | ||
9062712f TH |
2180 | rc = ata_do_link_spd_horkage(dev); |
2181 | if (rc) | |
2182 | return rc; | |
2183 | ||
6746544c TH |
2184 | /* let ACPI work its magic */ |
2185 | rc = ata_acpi_on_devcfg(dev); | |
2186 | if (rc) | |
2187 | return rc; | |
08573a86 | 2188 | |
05027adc TH |
2189 | /* massage HPA, do it early as it might change IDENTIFY data */ |
2190 | rc = ata_hpa_resize(dev); | |
2191 | if (rc) | |
2192 | return rc; | |
2193 | ||
c39f5ebe | 2194 | /* print device capabilities */ |
0dd4b21f | 2195 | if (ata_msg_probe(ap)) |
88574551 TH |
2196 | ata_dev_printk(dev, KERN_DEBUG, |
2197 | "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " | |
2198 | "85:%04x 86:%04x 87:%04x 88:%04x\n", | |
7f5e4e8d | 2199 | __func__, |
f15a1daf TH |
2200 | id[49], id[82], id[83], id[84], |
2201 | id[85], id[86], id[87], id[88]); | |
c39f5ebe | 2202 | |
208a9933 | 2203 | /* initialize to-be-configured parameters */ |
ea1dd4e1 | 2204 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
208a9933 TH |
2205 | dev->max_sectors = 0; |
2206 | dev->cdb_len = 0; | |
2207 | dev->n_sectors = 0; | |
2208 | dev->cylinders = 0; | |
2209 | dev->heads = 0; | |
2210 | dev->sectors = 0; | |
e18086d6 | 2211 | dev->multi_count = 0; |
208a9933 | 2212 | |
1da177e4 LT |
2213 | /* |
2214 | * common ATA, ATAPI feature tests | |
2215 | */ | |
2216 | ||
ff8854b2 | 2217 | /* find max transfer mode; for printk only */ |
1148c3a7 | 2218 | xfer_mask = ata_id_xfermask(id); |
1da177e4 | 2219 | |
0dd4b21f BP |
2220 | if (ata_msg_probe(ap)) |
2221 | ata_dump_id(id); | |
1da177e4 | 2222 | |
ef143d57 AL |
2223 | /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
2224 | ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, | |
2225 | sizeof(fwrevbuf)); | |
2226 | ||
2227 | ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, | |
2228 | sizeof(modelbuf)); | |
2229 | ||
1da177e4 LT |
2230 | /* ATA-specific feature tests */ |
2231 | if (dev->class == ATA_DEV_ATA) { | |
b352e57d | 2232 | if (ata_id_is_cfa(id)) { |
62afe5d7 SS |
2233 | /* CPRM may make this media unusable */ |
2234 | if (id[ATA_ID_CFA_KEY_MGMT] & 1) | |
44877b4e TH |
2235 | ata_dev_printk(dev, KERN_WARNING, |
2236 | "supports DRM functions and may " | |
2237 | "not be fully accessable.\n"); | |
b352e57d | 2238 | snprintf(revbuf, 7, "CFA"); |
ae8d4ee7 | 2239 | } else { |
2dcb407e | 2240 | snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); |
ae8d4ee7 AC |
2241 | /* Warn the user if the device has TPM extensions */ |
2242 | if (ata_id_has_tpm(id)) | |
2243 | ata_dev_printk(dev, KERN_WARNING, | |
2244 | "supports DRM functions and may " | |
2245 | "not be fully accessable.\n"); | |
2246 | } | |
b352e57d | 2247 | |
1148c3a7 | 2248 | dev->n_sectors = ata_id_n_sectors(id); |
2940740b | 2249 | |
e18086d6 ML |
2250 | /* get current R/W Multiple count setting */ |
2251 | if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) { | |
2252 | unsigned int max = dev->id[47] & 0xff; | |
2253 | unsigned int cnt = dev->id[59] & 0xff; | |
2254 | /* only recognize/allow powers of two here */ | |
2255 | if (is_power_of_2(max) && is_power_of_2(cnt)) | |
2256 | if (cnt <= max) | |
2257 | dev->multi_count = cnt; | |
2258 | } | |
3f64f565 | 2259 | |
1148c3a7 | 2260 | if (ata_id_has_lba(id)) { |
4c2d721a | 2261 | const char *lba_desc; |
388539f3 | 2262 | char ncq_desc[24]; |
8bf62ece | 2263 | |
4c2d721a TH |
2264 | lba_desc = "LBA"; |
2265 | dev->flags |= ATA_DFLAG_LBA; | |
1148c3a7 | 2266 | if (ata_id_has_lba48(id)) { |
8bf62ece | 2267 | dev->flags |= ATA_DFLAG_LBA48; |
4c2d721a | 2268 | lba_desc = "LBA48"; |
6fc49adb TH |
2269 | |
2270 | if (dev->n_sectors >= (1UL << 28) && | |
2271 | ata_id_has_flush_ext(id)) | |
2272 | dev->flags |= ATA_DFLAG_FLUSH_EXT; | |
4c2d721a | 2273 | } |
8bf62ece | 2274 | |
a6e6ce8e | 2275 | /* config NCQ */ |
388539f3 SL |
2276 | rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); |
2277 | if (rc) | |
2278 | return rc; | |
a6e6ce8e | 2279 | |
8bf62ece | 2280 | /* print device info to dmesg */ |
3f64f565 EM |
2281 | if (ata_msg_drv(ap) && print_info) { |
2282 | ata_dev_printk(dev, KERN_INFO, | |
2283 | "%s: %s, %s, max %s\n", | |
2284 | revbuf, modelbuf, fwrevbuf, | |
2285 | ata_mode_string(xfer_mask)); | |
2286 | ata_dev_printk(dev, KERN_INFO, | |
2287 | "%Lu sectors, multi %u: %s %s\n", | |
f15a1daf | 2288 | (unsigned long long)dev->n_sectors, |
3f64f565 EM |
2289 | dev->multi_count, lba_desc, ncq_desc); |
2290 | } | |
ffeae418 | 2291 | } else { |
8bf62ece AL |
2292 | /* CHS */ |
2293 | ||
2294 | /* Default translation */ | |
1148c3a7 TH |
2295 | dev->cylinders = id[1]; |
2296 | dev->heads = id[3]; | |
2297 | dev->sectors = id[6]; | |
8bf62ece | 2298 | |
1148c3a7 | 2299 | if (ata_id_current_chs_valid(id)) { |
8bf62ece | 2300 | /* Current CHS translation is valid. */ |
1148c3a7 TH |
2301 | dev->cylinders = id[54]; |
2302 | dev->heads = id[55]; | |
2303 | dev->sectors = id[56]; | |
8bf62ece AL |
2304 | } |
2305 | ||
2306 | /* print device info to dmesg */ | |
3f64f565 | 2307 | if (ata_msg_drv(ap) && print_info) { |
88574551 | 2308 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2309 | "%s: %s, %s, max %s\n", |
2310 | revbuf, modelbuf, fwrevbuf, | |
2311 | ata_mode_string(xfer_mask)); | |
a84471fe | 2312 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2313 | "%Lu sectors, multi %u, CHS %u/%u/%u\n", |
2314 | (unsigned long long)dev->n_sectors, | |
2315 | dev->multi_count, dev->cylinders, | |
2316 | dev->heads, dev->sectors); | |
2317 | } | |
07f6f7d0 AL |
2318 | } |
2319 | ||
6e7846e9 | 2320 | dev->cdb_len = 16; |
1da177e4 LT |
2321 | } |
2322 | ||
2323 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 2324 | else if (dev->class == ATA_DEV_ATAPI) { |
854c73a2 TH |
2325 | const char *cdb_intr_string = ""; |
2326 | const char *atapi_an_string = ""; | |
91163006 | 2327 | const char *dma_dir_string = ""; |
7d77b247 | 2328 | u32 sntf; |
08a556db | 2329 | |
1148c3a7 | 2330 | rc = atapi_cdb_len(id); |
1da177e4 | 2331 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
0dd4b21f | 2332 | if (ata_msg_warn(ap)) |
88574551 TH |
2333 | ata_dev_printk(dev, KERN_WARNING, |
2334 | "unsupported CDB len\n"); | |
ffeae418 | 2335 | rc = -EINVAL; |
1da177e4 LT |
2336 | goto err_out_nosup; |
2337 | } | |
6e7846e9 | 2338 | dev->cdb_len = (unsigned int) rc; |
1da177e4 | 2339 | |
7d77b247 TH |
2340 | /* Enable ATAPI AN if both the host and device have |
2341 | * the support. If PMP is attached, SNTF is required | |
2342 | * to enable ATAPI AN to discern between PHY status | |
2343 | * changed notifications and ATAPI ANs. | |
9f45cbd3 | 2344 | */ |
e7ecd435 TH |
2345 | if (atapi_an && |
2346 | (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && | |
071f44b1 | 2347 | (!sata_pmp_attached(ap) || |
7d77b247 | 2348 | sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { |
854c73a2 TH |
2349 | unsigned int err_mask; |
2350 | ||
9f45cbd3 | 2351 | /* issue SET feature command to turn this on */ |
218f3d30 JG |
2352 | err_mask = ata_dev_set_feature(dev, |
2353 | SETFEATURES_SATA_ENABLE, SATA_AN); | |
854c73a2 | 2354 | if (err_mask) |
9f45cbd3 | 2355 | ata_dev_printk(dev, KERN_ERR, |
854c73a2 TH |
2356 | "failed to enable ATAPI AN " |
2357 | "(err_mask=0x%x)\n", err_mask); | |
2358 | else { | |
9f45cbd3 | 2359 | dev->flags |= ATA_DFLAG_AN; |
854c73a2 TH |
2360 | atapi_an_string = ", ATAPI AN"; |
2361 | } | |
9f45cbd3 KCA |
2362 | } |
2363 | ||
08a556db | 2364 | if (ata_id_cdb_intr(dev->id)) { |
312f7da2 | 2365 | dev->flags |= ATA_DFLAG_CDB_INTR; |
08a556db AL |
2366 | cdb_intr_string = ", CDB intr"; |
2367 | } | |
312f7da2 | 2368 | |
91163006 TH |
2369 | if (atapi_dmadir || atapi_id_dmadir(dev->id)) { |
2370 | dev->flags |= ATA_DFLAG_DMADIR; | |
2371 | dma_dir_string = ", DMADIR"; | |
2372 | } | |
2373 | ||
1da177e4 | 2374 | /* print device info to dmesg */ |
5afc8142 | 2375 | if (ata_msg_drv(ap) && print_info) |
ef143d57 | 2376 | ata_dev_printk(dev, KERN_INFO, |
91163006 | 2377 | "ATAPI: %s, %s, max %s%s%s%s\n", |
ef143d57 | 2378 | modelbuf, fwrevbuf, |
12436c30 | 2379 | ata_mode_string(xfer_mask), |
91163006 TH |
2380 | cdb_intr_string, atapi_an_string, |
2381 | dma_dir_string); | |
1da177e4 LT |
2382 | } |
2383 | ||
914ed354 TH |
2384 | /* determine max_sectors */ |
2385 | dev->max_sectors = ATA_MAX_SECTORS; | |
2386 | if (dev->flags & ATA_DFLAG_LBA48) | |
2387 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; | |
2388 | ||
c5038fc0 AC |
2389 | /* Limit PATA drive on SATA cable bridge transfers to udma5, |
2390 | 200 sectors */ | |
3373efd8 | 2391 | if (ata_dev_knobble(dev)) { |
5afc8142 | 2392 | if (ata_msg_drv(ap) && print_info) |
f15a1daf TH |
2393 | ata_dev_printk(dev, KERN_INFO, |
2394 | "applying bridge limits\n"); | |
5a529139 | 2395 | dev->udma_mask &= ATA_UDMA5; |
4b2f3ede TH |
2396 | dev->max_sectors = ATA_MAX_SECTORS; |
2397 | } | |
2398 | ||
f8d8e579 | 2399 | if ((dev->class == ATA_DEV_ATAPI) && |
f442cd86 | 2400 | (atapi_command_packet_set(id) == TYPE_TAPE)) { |
f8d8e579 | 2401 | dev->max_sectors = ATA_MAX_SECTORS_TAPE; |
f442cd86 AL |
2402 | dev->horkage |= ATA_HORKAGE_STUCK_ERR; |
2403 | } | |
f8d8e579 | 2404 | |
75683fe7 | 2405 | if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) |
03ec52de TH |
2406 | dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, |
2407 | dev->max_sectors); | |
18d6e9d5 | 2408 | |
4b2f3ede | 2409 | if (ap->ops->dev_config) |
cd0d3bbc | 2410 | ap->ops->dev_config(dev); |
4b2f3ede | 2411 | |
c5038fc0 AC |
2412 | if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
2413 | /* Let the user know. We don't want to disallow opens for | |
2414 | rescue purposes, or in case the vendor is just a blithering | |
2415 | idiot. Do this after the dev_config call as some controllers | |
2416 | with buggy firmware may want to avoid reporting false device | |
2417 | bugs */ | |
2418 | ||
2419 | if (print_info) { | |
2420 | ata_dev_printk(dev, KERN_WARNING, | |
2421 | "Drive reports diagnostics failure. This may indicate a drive\n"); | |
2422 | ata_dev_printk(dev, KERN_WARNING, | |
2423 | "fault or invalid emulation. Contact drive vendor for information.\n"); | |
2424 | } | |
2425 | } | |
2426 | ||
ac70a964 TH |
2427 | if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) { |
2428 | ata_dev_printk(dev, KERN_WARNING, "WARNING: device requires " | |
2429 | "firmware update to be fully functional.\n"); | |
2430 | ata_dev_printk(dev, KERN_WARNING, " contact the vendor " | |
2431 | "or visit http://ata.wiki.kernel.org.\n"); | |
2432 | } | |
2433 | ||
ffeae418 | 2434 | return 0; |
1da177e4 LT |
2435 | |
2436 | err_out_nosup: | |
0dd4b21f | 2437 | if (ata_msg_probe(ap)) |
88574551 | 2438 | ata_dev_printk(dev, KERN_DEBUG, |
7f5e4e8d | 2439 | "%s: EXIT, err\n", __func__); |
ffeae418 | 2440 | return rc; |
1da177e4 LT |
2441 | } |
2442 | ||
be0d18df | 2443 | /** |
2e41e8e6 | 2444 | * ata_cable_40wire - return 40 wire cable type |
be0d18df AC |
2445 | * @ap: port |
2446 | * | |
2e41e8e6 | 2447 | * Helper method for drivers which want to hardwire 40 wire cable |
be0d18df AC |
2448 | * detection. |
2449 | */ | |
2450 | ||
2451 | int ata_cable_40wire(struct ata_port *ap) | |
2452 | { | |
2453 | return ATA_CBL_PATA40; | |
2454 | } | |
2455 | ||
2456 | /** | |
2e41e8e6 | 2457 | * ata_cable_80wire - return 80 wire cable type |
be0d18df AC |
2458 | * @ap: port |
2459 | * | |
2e41e8e6 | 2460 | * Helper method for drivers which want to hardwire 80 wire cable |
be0d18df AC |
2461 | * detection. |
2462 | */ | |
2463 | ||
2464 | int ata_cable_80wire(struct ata_port *ap) | |
2465 | { | |
2466 | return ATA_CBL_PATA80; | |
2467 | } | |
2468 | ||
2469 | /** | |
2470 | * ata_cable_unknown - return unknown PATA cable. | |
2471 | * @ap: port | |
2472 | * | |
2473 | * Helper method for drivers which have no PATA cable detection. | |
2474 | */ | |
2475 | ||
2476 | int ata_cable_unknown(struct ata_port *ap) | |
2477 | { | |
2478 | return ATA_CBL_PATA_UNK; | |
2479 | } | |
2480 | ||
c88f90c3 TH |
2481 | /** |
2482 | * ata_cable_ignore - return ignored PATA cable. | |
2483 | * @ap: port | |
2484 | * | |
2485 | * Helper method for drivers which don't use cable type to limit | |
2486 | * transfer mode. | |
2487 | */ | |
2488 | int ata_cable_ignore(struct ata_port *ap) | |
2489 | { | |
2490 | return ATA_CBL_PATA_IGN; | |
2491 | } | |
2492 | ||
be0d18df AC |
2493 | /** |
2494 | * ata_cable_sata - return SATA cable type | |
2495 | * @ap: port | |
2496 | * | |
2497 | * Helper method for drivers which have SATA cables | |
2498 | */ | |
2499 | ||
2500 | int ata_cable_sata(struct ata_port *ap) | |
2501 | { | |
2502 | return ATA_CBL_SATA; | |
2503 | } | |
2504 | ||
1da177e4 LT |
2505 | /** |
2506 | * ata_bus_probe - Reset and probe ATA bus | |
2507 | * @ap: Bus to probe | |
2508 | * | |
0cba632b JG |
2509 | * Master ATA bus probing function. Initiates a hardware-dependent |
2510 | * bus reset, then attempts to identify any devices found on | |
2511 | * the bus. | |
2512 | * | |
1da177e4 | 2513 | * LOCKING: |
0cba632b | 2514 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2515 | * |
2516 | * RETURNS: | |
96072e69 | 2517 | * Zero on success, negative errno otherwise. |
1da177e4 LT |
2518 | */ |
2519 | ||
80289167 | 2520 | int ata_bus_probe(struct ata_port *ap) |
1da177e4 | 2521 | { |
28ca5c57 | 2522 | unsigned int classes[ATA_MAX_DEVICES]; |
14d2bac1 | 2523 | int tries[ATA_MAX_DEVICES]; |
f58229f8 | 2524 | int rc; |
e82cbdb9 | 2525 | struct ata_device *dev; |
1da177e4 | 2526 | |
1eca4365 | 2527 | ata_for_each_dev(dev, &ap->link, ALL) |
f58229f8 | 2528 | tries[dev->devno] = ATA_PROBE_MAX_TRIES; |
14d2bac1 TH |
2529 | |
2530 | retry: | |
1eca4365 | 2531 | ata_for_each_dev(dev, &ap->link, ALL) { |
cdeab114 TH |
2532 | /* If we issue an SRST then an ATA drive (not ATAPI) |
2533 | * may change configuration and be in PIO0 timing. If | |
2534 | * we do a hard reset (or are coming from power on) | |
2535 | * this is true for ATA or ATAPI. Until we've set a | |
2536 | * suitable controller mode we should not touch the | |
2537 | * bus as we may be talking too fast. | |
2538 | */ | |
2539 | dev->pio_mode = XFER_PIO_0; | |
2540 | ||
2541 | /* If the controller has a pio mode setup function | |
2542 | * then use it to set the chipset to rights. Don't | |
2543 | * touch the DMA setup as that will be dealt with when | |
2544 | * configuring devices. | |
2545 | */ | |
2546 | if (ap->ops->set_piomode) | |
2547 | ap->ops->set_piomode(ap, dev); | |
2548 | } | |
2549 | ||
2044470c | 2550 | /* reset and determine device classes */ |
52783c5d | 2551 | ap->ops->phy_reset(ap); |
2061a47a | 2552 | |
1eca4365 | 2553 | ata_for_each_dev(dev, &ap->link, ALL) { |
3e4ec344 | 2554 | if (dev->class != ATA_DEV_UNKNOWN) |
52783c5d TH |
2555 | classes[dev->devno] = dev->class; |
2556 | else | |
2557 | classes[dev->devno] = ATA_DEV_NONE; | |
2044470c | 2558 | |
52783c5d | 2559 | dev->class = ATA_DEV_UNKNOWN; |
28ca5c57 | 2560 | } |
1da177e4 | 2561 | |
f31f0cc2 JG |
2562 | /* read IDENTIFY page and configure devices. We have to do the identify |
2563 | specific sequence bass-ackwards so that PDIAG- is released by | |
2564 | the slave device */ | |
2565 | ||
1eca4365 | 2566 | ata_for_each_dev(dev, &ap->link, ALL_REVERSE) { |
f58229f8 TH |
2567 | if (tries[dev->devno]) |
2568 | dev->class = classes[dev->devno]; | |
ffeae418 | 2569 | |
14d2bac1 | 2570 | if (!ata_dev_enabled(dev)) |
ffeae418 | 2571 | continue; |
ffeae418 | 2572 | |
bff04647 TH |
2573 | rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
2574 | dev->id); | |
14d2bac1 TH |
2575 | if (rc) |
2576 | goto fail; | |
f31f0cc2 JG |
2577 | } |
2578 | ||
be0d18df AC |
2579 | /* Now ask for the cable type as PDIAG- should have been released */ |
2580 | if (ap->ops->cable_detect) | |
2581 | ap->cbl = ap->ops->cable_detect(ap); | |
2582 | ||
1eca4365 TH |
2583 | /* We may have SATA bridge glue hiding here irrespective of |
2584 | * the reported cable types and sensed types. When SATA | |
2585 | * drives indicate we have a bridge, we don't know which end | |
2586 | * of the link the bridge is which is a problem. | |
2587 | */ | |
2588 | ata_for_each_dev(dev, &ap->link, ENABLED) | |
614fe29b AC |
2589 | if (ata_id_is_sata(dev->id)) |
2590 | ap->cbl = ATA_CBL_SATA; | |
614fe29b | 2591 | |
f31f0cc2 JG |
2592 | /* After the identify sequence we can now set up the devices. We do |
2593 | this in the normal order so that the user doesn't get confused */ | |
2594 | ||
1eca4365 | 2595 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
9af5c9c9 | 2596 | ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; |
efdaedc4 | 2597 | rc = ata_dev_configure(dev); |
9af5c9c9 | 2598 | ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; |
14d2bac1 TH |
2599 | if (rc) |
2600 | goto fail; | |
1da177e4 LT |
2601 | } |
2602 | ||
e82cbdb9 | 2603 | /* configure transfer mode */ |
0260731f | 2604 | rc = ata_set_mode(&ap->link, &dev); |
4ae72a1e | 2605 | if (rc) |
51713d35 | 2606 | goto fail; |
1da177e4 | 2607 | |
1eca4365 TH |
2608 | ata_for_each_dev(dev, &ap->link, ENABLED) |
2609 | return 0; | |
1da177e4 | 2610 | |
96072e69 | 2611 | return -ENODEV; |
14d2bac1 TH |
2612 | |
2613 | fail: | |
4ae72a1e TH |
2614 | tries[dev->devno]--; |
2615 | ||
14d2bac1 TH |
2616 | switch (rc) { |
2617 | case -EINVAL: | |
4ae72a1e | 2618 | /* eeek, something went very wrong, give up */ |
14d2bac1 TH |
2619 | tries[dev->devno] = 0; |
2620 | break; | |
4ae72a1e TH |
2621 | |
2622 | case -ENODEV: | |
2623 | /* give it just one more chance */ | |
2624 | tries[dev->devno] = min(tries[dev->devno], 1); | |
14d2bac1 | 2625 | case -EIO: |
4ae72a1e TH |
2626 | if (tries[dev->devno] == 1) { |
2627 | /* This is the last chance, better to slow | |
2628 | * down than lose it. | |
2629 | */ | |
a07d499b | 2630 | sata_down_spd_limit(&ap->link, 0); |
4ae72a1e TH |
2631 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
2632 | } | |
14d2bac1 TH |
2633 | } |
2634 | ||
4ae72a1e | 2635 | if (!tries[dev->devno]) |
3373efd8 | 2636 | ata_dev_disable(dev); |
ec573755 | 2637 | |
14d2bac1 | 2638 | goto retry; |
1da177e4 LT |
2639 | } |
2640 | ||
3be680b7 TH |
2641 | /** |
2642 | * sata_print_link_status - Print SATA link status | |
936fd732 | 2643 | * @link: SATA link to printk link status about |
3be680b7 TH |
2644 | * |
2645 | * This function prints link speed and status of a SATA link. | |
2646 | * | |
2647 | * LOCKING: | |
2648 | * None. | |
2649 | */ | |
6bdb4fc9 | 2650 | static void sata_print_link_status(struct ata_link *link) |
3be680b7 | 2651 | { |
6d5f9732 | 2652 | u32 sstatus, scontrol, tmp; |
3be680b7 | 2653 | |
936fd732 | 2654 | if (sata_scr_read(link, SCR_STATUS, &sstatus)) |
3be680b7 | 2655 | return; |
936fd732 | 2656 | sata_scr_read(link, SCR_CONTROL, &scontrol); |
3be680b7 | 2657 | |
b1c72916 | 2658 | if (ata_phys_link_online(link)) { |
3be680b7 | 2659 | tmp = (sstatus >> 4) & 0xf; |
936fd732 | 2660 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2661 | "SATA link up %s (SStatus %X SControl %X)\n", |
2662 | sata_spd_string(tmp), sstatus, scontrol); | |
3be680b7 | 2663 | } else { |
936fd732 | 2664 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2665 | "SATA link down (SStatus %X SControl %X)\n", |
2666 | sstatus, scontrol); | |
3be680b7 TH |
2667 | } |
2668 | } | |
2669 | ||
ebdfca6e AC |
2670 | /** |
2671 | * ata_dev_pair - return other device on cable | |
ebdfca6e AC |
2672 | * @adev: device |
2673 | * | |
2674 | * Obtain the other device on the same cable, or if none is | |
2675 | * present NULL is returned | |
2676 | */ | |
2e9edbf8 | 2677 | |
3373efd8 | 2678 | struct ata_device *ata_dev_pair(struct ata_device *adev) |
ebdfca6e | 2679 | { |
9af5c9c9 TH |
2680 | struct ata_link *link = adev->link; |
2681 | struct ata_device *pair = &link->device[1 - adev->devno]; | |
e1211e3f | 2682 | if (!ata_dev_enabled(pair)) |
ebdfca6e AC |
2683 | return NULL; |
2684 | return pair; | |
2685 | } | |
2686 | ||
1c3fae4d | 2687 | /** |
3c567b7d | 2688 | * sata_down_spd_limit - adjust SATA spd limit downward |
936fd732 | 2689 | * @link: Link to adjust SATA spd limit for |
a07d499b | 2690 | * @spd_limit: Additional limit |
1c3fae4d | 2691 | * |
936fd732 | 2692 | * Adjust SATA spd limit of @link downward. Note that this |
1c3fae4d | 2693 | * function only adjusts the limit. The change must be applied |
3c567b7d | 2694 | * using sata_set_spd(). |
1c3fae4d | 2695 | * |
a07d499b TH |
2696 | * If @spd_limit is non-zero, the speed is limited to equal to or |
2697 | * lower than @spd_limit if such speed is supported. If | |
2698 | * @spd_limit is slower than any supported speed, only the lowest | |
2699 | * supported speed is allowed. | |
2700 | * | |
1c3fae4d TH |
2701 | * LOCKING: |
2702 | * Inherited from caller. | |
2703 | * | |
2704 | * RETURNS: | |
2705 | * 0 on success, negative errno on failure | |
2706 | */ | |
a07d499b | 2707 | int sata_down_spd_limit(struct ata_link *link, u32 spd_limit) |
1c3fae4d | 2708 | { |
81952c54 | 2709 | u32 sstatus, spd, mask; |
a07d499b | 2710 | int rc, bit; |
1c3fae4d | 2711 | |
936fd732 | 2712 | if (!sata_scr_valid(link)) |
008a7896 TH |
2713 | return -EOPNOTSUPP; |
2714 | ||
2715 | /* If SCR can be read, use it to determine the current SPD. | |
936fd732 | 2716 | * If not, use cached value in link->sata_spd. |
008a7896 | 2717 | */ |
936fd732 | 2718 | rc = sata_scr_read(link, SCR_STATUS, &sstatus); |
9913ff8a | 2719 | if (rc == 0 && ata_sstatus_online(sstatus)) |
008a7896 TH |
2720 | spd = (sstatus >> 4) & 0xf; |
2721 | else | |
936fd732 | 2722 | spd = link->sata_spd; |
1c3fae4d | 2723 | |
936fd732 | 2724 | mask = link->sata_spd_limit; |
1c3fae4d TH |
2725 | if (mask <= 1) |
2726 | return -EINVAL; | |
008a7896 TH |
2727 | |
2728 | /* unconditionally mask off the highest bit */ | |
a07d499b TH |
2729 | bit = fls(mask) - 1; |
2730 | mask &= ~(1 << bit); | |
1c3fae4d | 2731 | |
008a7896 TH |
2732 | /* Mask off all speeds higher than or equal to the current |
2733 | * one. Force 1.5Gbps if current SPD is not available. | |
2734 | */ | |
2735 | if (spd > 1) | |
2736 | mask &= (1 << (spd - 1)) - 1; | |
2737 | else | |
2738 | mask &= 1; | |
2739 | ||
2740 | /* were we already at the bottom? */ | |
1c3fae4d TH |
2741 | if (!mask) |
2742 | return -EINVAL; | |
2743 | ||
a07d499b TH |
2744 | if (spd_limit) { |
2745 | if (mask & ((1 << spd_limit) - 1)) | |
2746 | mask &= (1 << spd_limit) - 1; | |
2747 | else { | |
2748 | bit = ffs(mask) - 1; | |
2749 | mask = 1 << bit; | |
2750 | } | |
2751 | } | |
2752 | ||
936fd732 | 2753 | link->sata_spd_limit = mask; |
1c3fae4d | 2754 | |
936fd732 | 2755 | ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", |
f15a1daf | 2756 | sata_spd_string(fls(mask))); |
1c3fae4d TH |
2757 | |
2758 | return 0; | |
2759 | } | |
2760 | ||
936fd732 | 2761 | static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) |
1c3fae4d | 2762 | { |
5270222f TH |
2763 | struct ata_link *host_link = &link->ap->link; |
2764 | u32 limit, target, spd; | |
1c3fae4d | 2765 | |
5270222f TH |
2766 | limit = link->sata_spd_limit; |
2767 | ||
2768 | /* Don't configure downstream link faster than upstream link. | |
2769 | * It doesn't speed up anything and some PMPs choke on such | |
2770 | * configuration. | |
2771 | */ | |
2772 | if (!ata_is_host_link(link) && host_link->sata_spd) | |
2773 | limit &= (1 << host_link->sata_spd) - 1; | |
2774 | ||
2775 | if (limit == UINT_MAX) | |
2776 | target = 0; | |
1c3fae4d | 2777 | else |
5270222f | 2778 | target = fls(limit); |
1c3fae4d TH |
2779 | |
2780 | spd = (*scontrol >> 4) & 0xf; | |
5270222f | 2781 | *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4); |
1c3fae4d | 2782 | |
5270222f | 2783 | return spd != target; |
1c3fae4d TH |
2784 | } |
2785 | ||
2786 | /** | |
3c567b7d | 2787 | * sata_set_spd_needed - is SATA spd configuration needed |
936fd732 | 2788 | * @link: Link in question |
1c3fae4d TH |
2789 | * |
2790 | * Test whether the spd limit in SControl matches | |
936fd732 | 2791 | * @link->sata_spd_limit. This function is used to determine |
1c3fae4d TH |
2792 | * whether hardreset is necessary to apply SATA spd |
2793 | * configuration. | |
2794 | * | |
2795 | * LOCKING: | |
2796 | * Inherited from caller. | |
2797 | * | |
2798 | * RETURNS: | |
2799 | * 1 if SATA spd configuration is needed, 0 otherwise. | |
2800 | */ | |
1dc55e87 | 2801 | static int sata_set_spd_needed(struct ata_link *link) |
1c3fae4d TH |
2802 | { |
2803 | u32 scontrol; | |
2804 | ||
936fd732 | 2805 | if (sata_scr_read(link, SCR_CONTROL, &scontrol)) |
db64bcf3 | 2806 | return 1; |
1c3fae4d | 2807 | |
936fd732 | 2808 | return __sata_set_spd_needed(link, &scontrol); |
1c3fae4d TH |
2809 | } |
2810 | ||
2811 | /** | |
3c567b7d | 2812 | * sata_set_spd - set SATA spd according to spd limit |
936fd732 | 2813 | * @link: Link to set SATA spd for |
1c3fae4d | 2814 | * |
936fd732 | 2815 | * Set SATA spd of @link according to sata_spd_limit. |
1c3fae4d TH |
2816 | * |
2817 | * LOCKING: | |
2818 | * Inherited from caller. | |
2819 | * | |
2820 | * RETURNS: | |
2821 | * 0 if spd doesn't need to be changed, 1 if spd has been | |
81952c54 | 2822 | * changed. Negative errno if SCR registers are inaccessible. |
1c3fae4d | 2823 | */ |
936fd732 | 2824 | int sata_set_spd(struct ata_link *link) |
1c3fae4d TH |
2825 | { |
2826 | u32 scontrol; | |
81952c54 | 2827 | int rc; |
1c3fae4d | 2828 | |
936fd732 | 2829 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 2830 | return rc; |
1c3fae4d | 2831 | |
936fd732 | 2832 | if (!__sata_set_spd_needed(link, &scontrol)) |
1c3fae4d TH |
2833 | return 0; |
2834 | ||
936fd732 | 2835 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 TH |
2836 | return rc; |
2837 | ||
1c3fae4d TH |
2838 | return 1; |
2839 | } | |
2840 | ||
452503f9 AC |
2841 | /* |
2842 | * This mode timing computation functionality is ported over from | |
2843 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
2844 | */ | |
2845 | /* | |
b352e57d | 2846 | * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). |
452503f9 | 2847 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
b352e57d AC |
2848 | * for UDMA6, which is currently supported only by Maxtor drives. |
2849 | * | |
2850 | * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. | |
452503f9 AC |
2851 | */ |
2852 | ||
2853 | static const struct ata_timing ata_timing[] = { | |
3ada9c12 DD |
2854 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */ |
2855 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 }, | |
2856 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 }, | |
2857 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 }, | |
2858 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 }, | |
2859 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 }, | |
2860 | { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 }, | |
2861 | { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 }, | |
2862 | ||
2863 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 }, | |
2864 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 }, | |
2865 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 }, | |
2866 | ||
2867 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 }, | |
2868 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 }, | |
2869 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 }, | |
2870 | { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 }, | |
2871 | { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 }, | |
2872 | ||
2873 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
2874 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 }, | |
2875 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
2876 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 }, | |
2877 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
2878 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
2879 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
2880 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
452503f9 AC |
2881 | |
2882 | { 0xFF } | |
2883 | }; | |
2884 | ||
2dcb407e JG |
2885 | #define ENOUGH(v, unit) (((v)-1)/(unit)+1) |
2886 | #define EZ(v, unit) ((v)?ENOUGH(v, unit):0) | |
452503f9 AC |
2887 | |
2888 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
2889 | { | |
3ada9c12 DD |
2890 | q->setup = EZ(t->setup * 1000, T); |
2891 | q->act8b = EZ(t->act8b * 1000, T); | |
2892 | q->rec8b = EZ(t->rec8b * 1000, T); | |
2893 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
2894 | q->active = EZ(t->active * 1000, T); | |
2895 | q->recover = EZ(t->recover * 1000, T); | |
2896 | q->dmack_hold = EZ(t->dmack_hold * 1000, T); | |
2897 | q->cycle = EZ(t->cycle * 1000, T); | |
2898 | q->udma = EZ(t->udma * 1000, UT); | |
452503f9 AC |
2899 | } |
2900 | ||
2901 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
2902 | struct ata_timing *m, unsigned int what) | |
2903 | { | |
2904 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
2905 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
2906 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
2907 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
2908 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
2909 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
3ada9c12 | 2910 | if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold); |
452503f9 AC |
2911 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); |
2912 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
2913 | } | |
2914 | ||
6357357c | 2915 | const struct ata_timing *ata_timing_find_mode(u8 xfer_mode) |
452503f9 | 2916 | { |
70cd071e TH |
2917 | const struct ata_timing *t = ata_timing; |
2918 | ||
2919 | while (xfer_mode > t->mode) | |
2920 | t++; | |
452503f9 | 2921 | |
70cd071e TH |
2922 | if (xfer_mode == t->mode) |
2923 | return t; | |
2924 | return NULL; | |
452503f9 AC |
2925 | } |
2926 | ||
2927 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
2928 | struct ata_timing *t, int T, int UT) | |
2929 | { | |
9e8808a9 | 2930 | const u16 *id = adev->id; |
452503f9 AC |
2931 | const struct ata_timing *s; |
2932 | struct ata_timing p; | |
2933 | ||
2934 | /* | |
2e9edbf8 | 2935 | * Find the mode. |
75b1f2f8 | 2936 | */ |
452503f9 AC |
2937 | |
2938 | if (!(s = ata_timing_find_mode(speed))) | |
2939 | return -EINVAL; | |
2940 | ||
75b1f2f8 AL |
2941 | memcpy(t, s, sizeof(*s)); |
2942 | ||
452503f9 AC |
2943 | /* |
2944 | * If the drive is an EIDE drive, it can tell us it needs extended | |
2945 | * PIO/MW_DMA cycle timing. | |
2946 | */ | |
2947 | ||
9e8808a9 | 2948 | if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ |
452503f9 | 2949 | memset(&p, 0, sizeof(p)); |
9e8808a9 | 2950 | |
2dcb407e | 2951 | if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { |
9e8808a9 BZ |
2952 | if (speed <= XFER_PIO_2) |
2953 | p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO]; | |
2954 | else if ((speed <= XFER_PIO_4) || | |
2955 | (speed == XFER_PIO_5 && !ata_id_is_cfa(id))) | |
2956 | p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY]; | |
2957 | } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) | |
2958 | p.cycle = id[ATA_ID_EIDE_DMA_MIN]; | |
2959 | ||
452503f9 AC |
2960 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); |
2961 | } | |
2962 | ||
2963 | /* | |
2964 | * Convert the timing to bus clock counts. | |
2965 | */ | |
2966 | ||
75b1f2f8 | 2967 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
2968 | |
2969 | /* | |
c893a3ae RD |
2970 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
2971 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
2972 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
2973 | */ |
2974 | ||
fd3367af | 2975 | if (speed > XFER_PIO_6) { |
452503f9 AC |
2976 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
2977 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
2978 | } | |
2979 | ||
2980 | /* | |
c893a3ae | 2981 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
2982 | */ |
2983 | ||
2984 | if (t->act8b + t->rec8b < t->cyc8b) { | |
2985 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
2986 | t->rec8b = t->cyc8b - t->act8b; | |
2987 | } | |
2988 | ||
2989 | if (t->active + t->recover < t->cycle) { | |
2990 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
2991 | t->recover = t->cycle - t->active; | |
2992 | } | |
a617c09f | 2993 | |
4f701d1e AC |
2994 | /* In a few cases quantisation may produce enough errors to |
2995 | leave t->cycle too low for the sum of active and recovery | |
2996 | if so we must correct this */ | |
2997 | if (t->active + t->recover > t->cycle) | |
2998 | t->cycle = t->active + t->recover; | |
452503f9 AC |
2999 | |
3000 | return 0; | |
3001 | } | |
3002 | ||
a0f79b92 TH |
3003 | /** |
3004 | * ata_timing_cycle2mode - find xfer mode for the specified cycle duration | |
3005 | * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. | |
3006 | * @cycle: cycle duration in ns | |
3007 | * | |
3008 | * Return matching xfer mode for @cycle. The returned mode is of | |
3009 | * the transfer type specified by @xfer_shift. If @cycle is too | |
3010 | * slow for @xfer_shift, 0xff is returned. If @cycle is faster | |
3011 | * than the fastest known mode, the fasted mode is returned. | |
3012 | * | |
3013 | * LOCKING: | |
3014 | * None. | |
3015 | * | |
3016 | * RETURNS: | |
3017 | * Matching xfer_mode, 0xff if no match found. | |
3018 | */ | |
3019 | u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) | |
3020 | { | |
3021 | u8 base_mode = 0xff, last_mode = 0xff; | |
3022 | const struct ata_xfer_ent *ent; | |
3023 | const struct ata_timing *t; | |
3024 | ||
3025 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
3026 | if (ent->shift == xfer_shift) | |
3027 | base_mode = ent->base; | |
3028 | ||
3029 | for (t = ata_timing_find_mode(base_mode); | |
3030 | t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { | |
3031 | unsigned short this_cycle; | |
3032 | ||
3033 | switch (xfer_shift) { | |
3034 | case ATA_SHIFT_PIO: | |
3035 | case ATA_SHIFT_MWDMA: | |
3036 | this_cycle = t->cycle; | |
3037 | break; | |
3038 | case ATA_SHIFT_UDMA: | |
3039 | this_cycle = t->udma; | |
3040 | break; | |
3041 | default: | |
3042 | return 0xff; | |
3043 | } | |
3044 | ||
3045 | if (cycle > this_cycle) | |
3046 | break; | |
3047 | ||
3048 | last_mode = t->mode; | |
3049 | } | |
3050 | ||
3051 | return last_mode; | |
3052 | } | |
3053 | ||
cf176e1a TH |
3054 | /** |
3055 | * ata_down_xfermask_limit - adjust dev xfer masks downward | |
cf176e1a | 3056 | * @dev: Device to adjust xfer masks |
458337db | 3057 | * @sel: ATA_DNXFER_* selector |
cf176e1a TH |
3058 | * |
3059 | * Adjust xfer masks of @dev downward. Note that this function | |
3060 | * does not apply the change. Invoking ata_set_mode() afterwards | |
3061 | * will apply the limit. | |
3062 | * | |
3063 | * LOCKING: | |
3064 | * Inherited from caller. | |
3065 | * | |
3066 | * RETURNS: | |
3067 | * 0 on success, negative errno on failure | |
3068 | */ | |
458337db | 3069 | int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
cf176e1a | 3070 | { |
458337db | 3071 | char buf[32]; |
7dc951ae TH |
3072 | unsigned long orig_mask, xfer_mask; |
3073 | unsigned long pio_mask, mwdma_mask, udma_mask; | |
458337db | 3074 | int quiet, highbit; |
cf176e1a | 3075 | |
458337db TH |
3076 | quiet = !!(sel & ATA_DNXFER_QUIET); |
3077 | sel &= ~ATA_DNXFER_QUIET; | |
cf176e1a | 3078 | |
458337db TH |
3079 | xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
3080 | dev->mwdma_mask, | |
3081 | dev->udma_mask); | |
3082 | ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); | |
cf176e1a | 3083 | |
458337db TH |
3084 | switch (sel) { |
3085 | case ATA_DNXFER_PIO: | |
3086 | highbit = fls(pio_mask) - 1; | |
3087 | pio_mask &= ~(1 << highbit); | |
3088 | break; | |
3089 | ||
3090 | case ATA_DNXFER_DMA: | |
3091 | if (udma_mask) { | |
3092 | highbit = fls(udma_mask) - 1; | |
3093 | udma_mask &= ~(1 << highbit); | |
3094 | if (!udma_mask) | |
3095 | return -ENOENT; | |
3096 | } else if (mwdma_mask) { | |
3097 | highbit = fls(mwdma_mask) - 1; | |
3098 | mwdma_mask &= ~(1 << highbit); | |
3099 | if (!mwdma_mask) | |
3100 | return -ENOENT; | |
3101 | } | |
3102 | break; | |
3103 | ||
3104 | case ATA_DNXFER_40C: | |
3105 | udma_mask &= ATA_UDMA_MASK_40C; | |
3106 | break; | |
3107 | ||
3108 | case ATA_DNXFER_FORCE_PIO0: | |
3109 | pio_mask &= 1; | |
3110 | case ATA_DNXFER_FORCE_PIO: | |
3111 | mwdma_mask = 0; | |
3112 | udma_mask = 0; | |
3113 | break; | |
3114 | ||
458337db TH |
3115 | default: |
3116 | BUG(); | |
3117 | } | |
3118 | ||
3119 | xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
3120 | ||
3121 | if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) | |
3122 | return -ENOENT; | |
3123 | ||
3124 | if (!quiet) { | |
3125 | if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) | |
3126 | snprintf(buf, sizeof(buf), "%s:%s", | |
3127 | ata_mode_string(xfer_mask), | |
3128 | ata_mode_string(xfer_mask & ATA_MASK_PIO)); | |
3129 | else | |
3130 | snprintf(buf, sizeof(buf), "%s", | |
3131 | ata_mode_string(xfer_mask)); | |
3132 | ||
3133 | ata_dev_printk(dev, KERN_WARNING, | |
3134 | "limiting speed to %s\n", buf); | |
3135 | } | |
cf176e1a TH |
3136 | |
3137 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, | |
3138 | &dev->udma_mask); | |
3139 | ||
cf176e1a | 3140 | return 0; |
cf176e1a TH |
3141 | } |
3142 | ||
3373efd8 | 3143 | static int ata_dev_set_mode(struct ata_device *dev) |
1da177e4 | 3144 | { |
d0cb43b3 | 3145 | struct ata_port *ap = dev->link->ap; |
9af5c9c9 | 3146 | struct ata_eh_context *ehc = &dev->link->eh_context; |
d0cb43b3 | 3147 | const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER; |
4055dee7 TH |
3148 | const char *dev_err_whine = ""; |
3149 | int ign_dev_err = 0; | |
d0cb43b3 | 3150 | unsigned int err_mask = 0; |
83206a29 | 3151 | int rc; |
1da177e4 | 3152 | |
e8384607 | 3153 | dev->flags &= ~ATA_DFLAG_PIO; |
1da177e4 LT |
3154 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
3155 | dev->flags |= ATA_DFLAG_PIO; | |
3156 | ||
d0cb43b3 TH |
3157 | if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id)) |
3158 | dev_err_whine = " (SET_XFERMODE skipped)"; | |
3159 | else { | |
3160 | if (nosetxfer) | |
3161 | ata_dev_printk(dev, KERN_WARNING, | |
3162 | "NOSETXFER but PATA detected - can't " | |
3163 | "skip SETXFER, might malfunction\n"); | |
3164 | err_mask = ata_dev_set_xfermode(dev); | |
3165 | } | |
2dcb407e | 3166 | |
4055dee7 TH |
3167 | if (err_mask & ~AC_ERR_DEV) |
3168 | goto fail; | |
3169 | ||
3170 | /* revalidate */ | |
3171 | ehc->i.flags |= ATA_EHI_POST_SETMODE; | |
3172 | rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); | |
3173 | ehc->i.flags &= ~ATA_EHI_POST_SETMODE; | |
3174 | if (rc) | |
3175 | return rc; | |
3176 | ||
b93fda12 AC |
3177 | if (dev->xfer_shift == ATA_SHIFT_PIO) { |
3178 | /* Old CFA may refuse this command, which is just fine */ | |
3179 | if (ata_id_is_cfa(dev->id)) | |
3180 | ign_dev_err = 1; | |
3181 | /* Catch several broken garbage emulations plus some pre | |
3182 | ATA devices */ | |
3183 | if (ata_id_major_version(dev->id) == 0 && | |
3184 | dev->pio_mode <= XFER_PIO_2) | |
3185 | ign_dev_err = 1; | |
3186 | /* Some very old devices and some bad newer ones fail | |
3187 | any kind of SET_XFERMODE request but support PIO0-2 | |
3188 | timings and no IORDY */ | |
3189 | if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2) | |
3190 | ign_dev_err = 1; | |
3191 | } | |
3acaf94b AC |
3192 | /* Early MWDMA devices do DMA but don't allow DMA mode setting. |
3193 | Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ | |
c5038fc0 | 3194 | if (dev->xfer_shift == ATA_SHIFT_MWDMA && |
3acaf94b AC |
3195 | dev->dma_mode == XFER_MW_DMA_0 && |
3196 | (dev->id[63] >> 8) & 1) | |
4055dee7 | 3197 | ign_dev_err = 1; |
3acaf94b | 3198 | |
4055dee7 TH |
3199 | /* if the device is actually configured correctly, ignore dev err */ |
3200 | if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) | |
3201 | ign_dev_err = 1; | |
1da177e4 | 3202 | |
4055dee7 TH |
3203 | if (err_mask & AC_ERR_DEV) { |
3204 | if (!ign_dev_err) | |
3205 | goto fail; | |
3206 | else | |
3207 | dev_err_whine = " (device error ignored)"; | |
3208 | } | |
48a8a14f | 3209 | |
23e71c3d TH |
3210 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
3211 | dev->xfer_shift, (int)dev->xfer_mode); | |
1da177e4 | 3212 | |
4055dee7 TH |
3213 | ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n", |
3214 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), | |
3215 | dev_err_whine); | |
3216 | ||
83206a29 | 3217 | return 0; |
4055dee7 TH |
3218 | |
3219 | fail: | |
3220 | ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " | |
3221 | "(err_mask=0x%x)\n", err_mask); | |
3222 | return -EIO; | |
1da177e4 LT |
3223 | } |
3224 | ||
1da177e4 | 3225 | /** |
04351821 | 3226 | * ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
0260731f | 3227 | * @link: link on which timings will be programmed |
1967b7ff | 3228 | * @r_failed_dev: out parameter for failed device |
1da177e4 | 3229 | * |
04351821 A |
3230 | * Standard implementation of the function used to tune and set |
3231 | * ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3232 | * ata_dev_set_mode() fails, pointer to the failing device is | |
e82cbdb9 | 3233 | * returned in @r_failed_dev. |
780a87f7 | 3234 | * |
1da177e4 | 3235 | * LOCKING: |
0cba632b | 3236 | * PCI/etc. bus probe sem. |
e82cbdb9 TH |
3237 | * |
3238 | * RETURNS: | |
3239 | * 0 on success, negative errno otherwise | |
1da177e4 | 3240 | */ |
04351821 | 3241 | |
0260731f | 3242 | int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
1da177e4 | 3243 | { |
0260731f | 3244 | struct ata_port *ap = link->ap; |
e8e0619f | 3245 | struct ata_device *dev; |
f58229f8 | 3246 | int rc = 0, used_dma = 0, found = 0; |
3adcebb2 | 3247 | |
a6d5a51c | 3248 | /* step 1: calculate xfer_mask */ |
1eca4365 | 3249 | ata_for_each_dev(dev, link, ENABLED) { |
7dc951ae | 3250 | unsigned long pio_mask, dma_mask; |
b3a70601 | 3251 | unsigned int mode_mask; |
a6d5a51c | 3252 | |
b3a70601 AC |
3253 | mode_mask = ATA_DMA_MASK_ATA; |
3254 | if (dev->class == ATA_DEV_ATAPI) | |
3255 | mode_mask = ATA_DMA_MASK_ATAPI; | |
3256 | else if (ata_id_is_cfa(dev->id)) | |
3257 | mode_mask = ATA_DMA_MASK_CFA; | |
3258 | ||
3373efd8 | 3259 | ata_dev_xfermask(dev); |
33267325 | 3260 | ata_force_xfermask(dev); |
1da177e4 | 3261 | |
acf356b1 TH |
3262 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
3263 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
b3a70601 AC |
3264 | |
3265 | if (libata_dma_mask & mode_mask) | |
3266 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
3267 | else | |
3268 | dma_mask = 0; | |
3269 | ||
acf356b1 TH |
3270 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); |
3271 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
5444a6f4 | 3272 | |
4f65977d | 3273 | found = 1; |
b15b3eba | 3274 | if (ata_dma_enabled(dev)) |
5444a6f4 | 3275 | used_dma = 1; |
a6d5a51c | 3276 | } |
4f65977d | 3277 | if (!found) |
e82cbdb9 | 3278 | goto out; |
a6d5a51c TH |
3279 | |
3280 | /* step 2: always set host PIO timings */ | |
1eca4365 | 3281 | ata_for_each_dev(dev, link, ENABLED) { |
70cd071e | 3282 | if (dev->pio_mode == 0xff) { |
f15a1daf | 3283 | ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); |
e8e0619f | 3284 | rc = -EINVAL; |
e82cbdb9 | 3285 | goto out; |
e8e0619f TH |
3286 | } |
3287 | ||
3288 | dev->xfer_mode = dev->pio_mode; | |
3289 | dev->xfer_shift = ATA_SHIFT_PIO; | |
3290 | if (ap->ops->set_piomode) | |
3291 | ap->ops->set_piomode(ap, dev); | |
3292 | } | |
1da177e4 | 3293 | |
a6d5a51c | 3294 | /* step 3: set host DMA timings */ |
1eca4365 TH |
3295 | ata_for_each_dev(dev, link, ENABLED) { |
3296 | if (!ata_dma_enabled(dev)) | |
e8e0619f TH |
3297 | continue; |
3298 | ||
3299 | dev->xfer_mode = dev->dma_mode; | |
3300 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
3301 | if (ap->ops->set_dmamode) | |
3302 | ap->ops->set_dmamode(ap, dev); | |
3303 | } | |
1da177e4 LT |
3304 | |
3305 | /* step 4: update devices' xfer mode */ | |
1eca4365 | 3306 | ata_for_each_dev(dev, link, ENABLED) { |
3373efd8 | 3307 | rc = ata_dev_set_mode(dev); |
5bbc53f4 | 3308 | if (rc) |
e82cbdb9 | 3309 | goto out; |
83206a29 | 3310 | } |
1da177e4 | 3311 | |
e8e0619f TH |
3312 | /* Record simplex status. If we selected DMA then the other |
3313 | * host channels are not permitted to do so. | |
5444a6f4 | 3314 | */ |
cca3974e | 3315 | if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
032af1ce | 3316 | ap->host->simplex_claimed = ap; |
5444a6f4 | 3317 | |
e82cbdb9 TH |
3318 | out: |
3319 | if (rc) | |
3320 | *r_failed_dev = dev; | |
3321 | return rc; | |
1da177e4 LT |
3322 | } |
3323 | ||
aa2731ad TH |
3324 | /** |
3325 | * ata_wait_ready - wait for link to become ready | |
3326 | * @link: link to be waited on | |
3327 | * @deadline: deadline jiffies for the operation | |
3328 | * @check_ready: callback to check link readiness | |
3329 | * | |
3330 | * Wait for @link to become ready. @check_ready should return | |
3331 | * positive number if @link is ready, 0 if it isn't, -ENODEV if | |
3332 | * link doesn't seem to be occupied, other errno for other error | |
3333 | * conditions. | |
3334 | * | |
3335 | * Transient -ENODEV conditions are allowed for | |
3336 | * ATA_TMOUT_FF_WAIT. | |
3337 | * | |
3338 | * LOCKING: | |
3339 | * EH context. | |
3340 | * | |
3341 | * RETURNS: | |
3342 | * 0 if @linke is ready before @deadline; otherwise, -errno. | |
3343 | */ | |
3344 | int ata_wait_ready(struct ata_link *link, unsigned long deadline, | |
3345 | int (*check_ready)(struct ata_link *link)) | |
3346 | { | |
3347 | unsigned long start = jiffies; | |
b48d58f5 | 3348 | unsigned long nodev_deadline; |
aa2731ad TH |
3349 | int warned = 0; |
3350 | ||
b48d58f5 TH |
3351 | /* choose which 0xff timeout to use, read comment in libata.h */ |
3352 | if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN) | |
3353 | nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG); | |
3354 | else | |
3355 | nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT); | |
3356 | ||
b1c72916 TH |
3357 | /* Slave readiness can't be tested separately from master. On |
3358 | * M/S emulation configuration, this function should be called | |
3359 | * only on the master and it will handle both master and slave. | |
3360 | */ | |
3361 | WARN_ON(link == link->ap->slave_link); | |
3362 | ||
aa2731ad TH |
3363 | if (time_after(nodev_deadline, deadline)) |
3364 | nodev_deadline = deadline; | |
3365 | ||
3366 | while (1) { | |
3367 | unsigned long now = jiffies; | |
3368 | int ready, tmp; | |
3369 | ||
3370 | ready = tmp = check_ready(link); | |
3371 | if (ready > 0) | |
3372 | return 0; | |
3373 | ||
b48d58f5 TH |
3374 | /* |
3375 | * -ENODEV could be transient. Ignore -ENODEV if link | |
aa2731ad | 3376 | * is online. Also, some SATA devices take a long |
b48d58f5 TH |
3377 | * time to clear 0xff after reset. Wait for |
3378 | * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't | |
3379 | * offline. | |
aa2731ad TH |
3380 | * |
3381 | * Note that some PATA controllers (pata_ali) explode | |
3382 | * if status register is read more than once when | |
3383 | * there's no device attached. | |
3384 | */ | |
3385 | if (ready == -ENODEV) { | |
3386 | if (ata_link_online(link)) | |
3387 | ready = 0; | |
3388 | else if ((link->ap->flags & ATA_FLAG_SATA) && | |
3389 | !ata_link_offline(link) && | |
3390 | time_before(now, nodev_deadline)) | |
3391 | ready = 0; | |
3392 | } | |
3393 | ||
3394 | if (ready) | |
3395 | return ready; | |
3396 | if (time_after(now, deadline)) | |
3397 | return -EBUSY; | |
3398 | ||
3399 | if (!warned && time_after(now, start + 5 * HZ) && | |
3400 | (deadline - now > 3 * HZ)) { | |
3401 | ata_link_printk(link, KERN_WARNING, | |
3402 | "link is slow to respond, please be patient " | |
3403 | "(ready=%d)\n", tmp); | |
3404 | warned = 1; | |
3405 | } | |
3406 | ||
3407 | msleep(50); | |
3408 | } | |
3409 | } | |
3410 | ||
3411 | /** | |
3412 | * ata_wait_after_reset - wait for link to become ready after reset | |
3413 | * @link: link to be waited on | |
3414 | * @deadline: deadline jiffies for the operation | |
3415 | * @check_ready: callback to check link readiness | |
3416 | * | |
3417 | * Wait for @link to become ready after reset. | |
3418 | * | |
3419 | * LOCKING: | |
3420 | * EH context. | |
3421 | * | |
3422 | * RETURNS: | |
3423 | * 0 if @linke is ready before @deadline; otherwise, -errno. | |
3424 | */ | |
2b4221bb | 3425 | int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, |
aa2731ad TH |
3426 | int (*check_ready)(struct ata_link *link)) |
3427 | { | |
341c2c95 | 3428 | msleep(ATA_WAIT_AFTER_RESET); |
aa2731ad TH |
3429 | |
3430 | return ata_wait_ready(link, deadline, check_ready); | |
3431 | } | |
3432 | ||
d7bb4cc7 | 3433 | /** |
936fd732 TH |
3434 | * sata_link_debounce - debounce SATA phy status |
3435 | * @link: ATA link to debounce SATA phy status for | |
d7bb4cc7 | 3436 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3437 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3438 | * |
1152b261 | 3439 | * Make sure SStatus of @link reaches stable state, determined by |
d7bb4cc7 TH |
3440 | * holding the same value where DET is not 1 for @duration polled |
3441 | * every @interval, before @timeout. Timeout constraints the | |
d4b2bab4 TH |
3442 | * beginning of the stable state. Because DET gets stuck at 1 on |
3443 | * some controllers after hot unplugging, this functions waits | |
d7bb4cc7 TH |
3444 | * until timeout then returns 0 if DET is stable at 1. |
3445 | * | |
d4b2bab4 TH |
3446 | * @timeout is further limited by @deadline. The sooner of the |
3447 | * two is used. | |
3448 | * | |
d7bb4cc7 TH |
3449 | * LOCKING: |
3450 | * Kernel thread context (may sleep) | |
3451 | * | |
3452 | * RETURNS: | |
3453 | * 0 on success, -errno on failure. | |
3454 | */ | |
936fd732 TH |
3455 | int sata_link_debounce(struct ata_link *link, const unsigned long *params, |
3456 | unsigned long deadline) | |
7a7921e8 | 3457 | { |
341c2c95 TH |
3458 | unsigned long interval = params[0]; |
3459 | unsigned long duration = params[1]; | |
d4b2bab4 | 3460 | unsigned long last_jiffies, t; |
d7bb4cc7 TH |
3461 | u32 last, cur; |
3462 | int rc; | |
3463 | ||
341c2c95 | 3464 | t = ata_deadline(jiffies, params[2]); |
d4b2bab4 TH |
3465 | if (time_before(t, deadline)) |
3466 | deadline = t; | |
3467 | ||
936fd732 | 3468 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3469 | return rc; |
3470 | cur &= 0xf; | |
3471 | ||
3472 | last = cur; | |
3473 | last_jiffies = jiffies; | |
3474 | ||
3475 | while (1) { | |
341c2c95 | 3476 | msleep(interval); |
936fd732 | 3477 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3478 | return rc; |
3479 | cur &= 0xf; | |
3480 | ||
3481 | /* DET stable? */ | |
3482 | if (cur == last) { | |
d4b2bab4 | 3483 | if (cur == 1 && time_before(jiffies, deadline)) |
d7bb4cc7 | 3484 | continue; |
341c2c95 TH |
3485 | if (time_after(jiffies, |
3486 | ata_deadline(last_jiffies, duration))) | |
d7bb4cc7 TH |
3487 | return 0; |
3488 | continue; | |
3489 | } | |
3490 | ||
3491 | /* unstable, start over */ | |
3492 | last = cur; | |
3493 | last_jiffies = jiffies; | |
3494 | ||
f1545154 TH |
3495 | /* Check deadline. If debouncing failed, return |
3496 | * -EPIPE to tell upper layer to lower link speed. | |
3497 | */ | |
d4b2bab4 | 3498 | if (time_after(jiffies, deadline)) |
f1545154 | 3499 | return -EPIPE; |
d7bb4cc7 TH |
3500 | } |
3501 | } | |
3502 | ||
3503 | /** | |
936fd732 TH |
3504 | * sata_link_resume - resume SATA link |
3505 | * @link: ATA link to resume SATA | |
d7bb4cc7 | 3506 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3507 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3508 | * |
936fd732 | 3509 | * Resume SATA phy @link and debounce it. |
d7bb4cc7 TH |
3510 | * |
3511 | * LOCKING: | |
3512 | * Kernel thread context (may sleep) | |
3513 | * | |
3514 | * RETURNS: | |
3515 | * 0 on success, -errno on failure. | |
3516 | */ | |
936fd732 TH |
3517 | int sata_link_resume(struct ata_link *link, const unsigned long *params, |
3518 | unsigned long deadline) | |
d7bb4cc7 | 3519 | { |
5040ab67 | 3520 | int tries = ATA_LINK_RESUME_TRIES; |
ac371987 | 3521 | u32 scontrol, serror; |
81952c54 TH |
3522 | int rc; |
3523 | ||
936fd732 | 3524 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 3525 | return rc; |
7a7921e8 | 3526 | |
5040ab67 TH |
3527 | /* |
3528 | * Writes to SControl sometimes get ignored under certain | |
3529 | * controllers (ata_piix SIDPR). Make sure DET actually is | |
3530 | * cleared. | |
3531 | */ | |
3532 | do { | |
3533 | scontrol = (scontrol & 0x0f0) | 0x300; | |
3534 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) | |
3535 | return rc; | |
3536 | /* | |
3537 | * Some PHYs react badly if SStatus is pounded | |
3538 | * immediately after resuming. Delay 200ms before | |
3539 | * debouncing. | |
3540 | */ | |
3541 | msleep(200); | |
81952c54 | 3542 | |
5040ab67 TH |
3543 | /* is SControl restored correctly? */ |
3544 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) | |
3545 | return rc; | |
3546 | } while ((scontrol & 0xf0f) != 0x300 && --tries); | |
7a7921e8 | 3547 | |
5040ab67 TH |
3548 | if ((scontrol & 0xf0f) != 0x300) { |
3549 | ata_link_printk(link, KERN_ERR, | |
3550 | "failed to resume link (SControl %X)\n", | |
3551 | scontrol); | |
3552 | return 0; | |
3553 | } | |
3554 | ||
3555 | if (tries < ATA_LINK_RESUME_TRIES) | |
3556 | ata_link_printk(link, KERN_WARNING, | |
3557 | "link resume succeeded after %d retries\n", | |
3558 | ATA_LINK_RESUME_TRIES - tries); | |
7a7921e8 | 3559 | |
ac371987 TH |
3560 | if ((rc = sata_link_debounce(link, params, deadline))) |
3561 | return rc; | |
3562 | ||
f046519f | 3563 | /* clear SError, some PHYs require this even for SRST to work */ |
ac371987 TH |
3564 | if (!(rc = sata_scr_read(link, SCR_ERROR, &serror))) |
3565 | rc = sata_scr_write(link, SCR_ERROR, serror); | |
ac371987 | 3566 | |
f046519f | 3567 | return rc != -EINVAL ? rc : 0; |
7a7921e8 TH |
3568 | } |
3569 | ||
1152b261 TH |
3570 | /** |
3571 | * sata_link_scr_lpm - manipulate SControl IPM and SPM fields | |
3572 | * @link: ATA link to manipulate SControl for | |
3573 | * @policy: LPM policy to configure | |
3574 | * @spm_wakeup: initiate LPM transition to active state | |
3575 | * | |
3576 | * Manipulate the IPM field of the SControl register of @link | |
3577 | * according to @policy. If @policy is ATA_LPM_MAX_POWER and | |
3578 | * @spm_wakeup is %true, the SPM field is manipulated to wake up | |
3579 | * the link. This function also clears PHYRDY_CHG before | |
3580 | * returning. | |
3581 | * | |
3582 | * LOCKING: | |
3583 | * EH context. | |
3584 | * | |
3585 | * RETURNS: | |
3586 | * 0 on succes, -errno otherwise. | |
3587 | */ | |
3588 | int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy, | |
3589 | bool spm_wakeup) | |
3590 | { | |
3591 | struct ata_eh_context *ehc = &link->eh_context; | |
3592 | bool woken_up = false; | |
3593 | u32 scontrol; | |
3594 | int rc; | |
3595 | ||
3596 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); | |
3597 | if (rc) | |
3598 | return rc; | |
3599 | ||
3600 | switch (policy) { | |
3601 | case ATA_LPM_MAX_POWER: | |
3602 | /* disable all LPM transitions */ | |
3603 | scontrol |= (0x3 << 8); | |
3604 | /* initiate transition to active state */ | |
3605 | if (spm_wakeup) { | |
3606 | scontrol |= (0x4 << 12); | |
3607 | woken_up = true; | |
3608 | } | |
3609 | break; | |
3610 | case ATA_LPM_MED_POWER: | |
3611 | /* allow LPM to PARTIAL */ | |
3612 | scontrol &= ~(0x1 << 8); | |
3613 | scontrol |= (0x2 << 8); | |
3614 | break; | |
3615 | case ATA_LPM_MIN_POWER: | |
3616 | /* no restrictions on LPM transitions */ | |
3617 | scontrol &= ~(0x3 << 8); | |
3618 | break; | |
3619 | default: | |
3620 | WARN_ON(1); | |
3621 | } | |
3622 | ||
3623 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
3624 | if (rc) | |
3625 | return rc; | |
3626 | ||
3627 | /* give the link time to transit out of LPM state */ | |
3628 | if (woken_up) | |
3629 | msleep(10); | |
3630 | ||
3631 | /* clear PHYRDY_CHG from SError */ | |
3632 | ehc->i.serror &= ~SERR_PHYRDY_CHG; | |
3633 | return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG); | |
3634 | } | |
3635 | ||
f5914a46 | 3636 | /** |
0aa1113d | 3637 | * ata_std_prereset - prepare for reset |
cc0680a5 | 3638 | * @link: ATA link to be reset |
d4b2bab4 | 3639 | * @deadline: deadline jiffies for the operation |
f5914a46 | 3640 | * |
cc0680a5 | 3641 | * @link is about to be reset. Initialize it. Failure from |
b8cffc6a TH |
3642 | * prereset makes libata abort whole reset sequence and give up |
3643 | * that port, so prereset should be best-effort. It does its | |
3644 | * best to prepare for reset sequence but if things go wrong, it | |
3645 | * should just whine, not fail. | |
f5914a46 TH |
3646 | * |
3647 | * LOCKING: | |
3648 | * Kernel thread context (may sleep) | |
3649 | * | |
3650 | * RETURNS: | |
3651 | * 0 on success, -errno otherwise. | |
3652 | */ | |
0aa1113d | 3653 | int ata_std_prereset(struct ata_link *link, unsigned long deadline) |
f5914a46 | 3654 | { |
cc0680a5 | 3655 | struct ata_port *ap = link->ap; |
936fd732 | 3656 | struct ata_eh_context *ehc = &link->eh_context; |
e9c83914 | 3657 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
f5914a46 TH |
3658 | int rc; |
3659 | ||
f5914a46 TH |
3660 | /* if we're about to do hardreset, nothing more to do */ |
3661 | if (ehc->i.action & ATA_EH_HARDRESET) | |
3662 | return 0; | |
3663 | ||
936fd732 | 3664 | /* if SATA, resume link */ |
a16abc0b | 3665 | if (ap->flags & ATA_FLAG_SATA) { |
936fd732 | 3666 | rc = sata_link_resume(link, timing, deadline); |
b8cffc6a TH |
3667 | /* whine about phy resume failure but proceed */ |
3668 | if (rc && rc != -EOPNOTSUPP) | |
cc0680a5 | 3669 | ata_link_printk(link, KERN_WARNING, "failed to resume " |
f5914a46 | 3670 | "link for reset (errno=%d)\n", rc); |
f5914a46 TH |
3671 | } |
3672 | ||
45db2f6c | 3673 | /* no point in trying softreset on offline link */ |
b1c72916 | 3674 | if (ata_phys_link_offline(link)) |
45db2f6c TH |
3675 | ehc->i.action &= ~ATA_EH_SOFTRESET; |
3676 | ||
f5914a46 TH |
3677 | return 0; |
3678 | } | |
3679 | ||
c2bd5804 | 3680 | /** |
624d5c51 TH |
3681 | * sata_link_hardreset - reset link via SATA phy reset |
3682 | * @link: link to reset | |
3683 | * @timing: timing parameters { interval, duratinon, timeout } in msec | |
d4b2bab4 | 3684 | * @deadline: deadline jiffies for the operation |
9dadd45b TH |
3685 | * @online: optional out parameter indicating link onlineness |
3686 | * @check_ready: optional callback to check link readiness | |
c2bd5804 | 3687 | * |
624d5c51 | 3688 | * SATA phy-reset @link using DET bits of SControl register. |
9dadd45b TH |
3689 | * After hardreset, link readiness is waited upon using |
3690 | * ata_wait_ready() if @check_ready is specified. LLDs are | |
3691 | * allowed to not specify @check_ready and wait itself after this | |
3692 | * function returns. Device classification is LLD's | |
3693 | * responsibility. | |
3694 | * | |
3695 | * *@online is set to one iff reset succeeded and @link is online | |
3696 | * after reset. | |
c2bd5804 TH |
3697 | * |
3698 | * LOCKING: | |
3699 | * Kernel thread context (may sleep) | |
3700 | * | |
3701 | * RETURNS: | |
3702 | * 0 on success, -errno otherwise. | |
3703 | */ | |
624d5c51 | 3704 | int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, |
9dadd45b TH |
3705 | unsigned long deadline, |
3706 | bool *online, int (*check_ready)(struct ata_link *)) | |
c2bd5804 | 3707 | { |
624d5c51 | 3708 | u32 scontrol; |
81952c54 | 3709 | int rc; |
852ee16a | 3710 | |
c2bd5804 TH |
3711 | DPRINTK("ENTER\n"); |
3712 | ||
9dadd45b TH |
3713 | if (online) |
3714 | *online = false; | |
3715 | ||
936fd732 | 3716 | if (sata_set_spd_needed(link)) { |
1c3fae4d TH |
3717 | /* SATA spec says nothing about how to reconfigure |
3718 | * spd. To be on the safe side, turn off phy during | |
3719 | * reconfiguration. This works for at least ICH7 AHCI | |
3720 | * and Sil3124. | |
3721 | */ | |
936fd732 | 3722 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 3723 | goto out; |
81952c54 | 3724 | |
a34b6fc0 | 3725 | scontrol = (scontrol & 0x0f0) | 0x304; |
81952c54 | 3726 | |
936fd732 | 3727 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
b6103f6d | 3728 | goto out; |
1c3fae4d | 3729 | |
936fd732 | 3730 | sata_set_spd(link); |
1c3fae4d TH |
3731 | } |
3732 | ||
3733 | /* issue phy wake/reset */ | |
936fd732 | 3734 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 3735 | goto out; |
81952c54 | 3736 | |
852ee16a | 3737 | scontrol = (scontrol & 0x0f0) | 0x301; |
81952c54 | 3738 | |
936fd732 | 3739 | if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) |
b6103f6d | 3740 | goto out; |
c2bd5804 | 3741 | |
1c3fae4d | 3742 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
c2bd5804 TH |
3743 | * 10.4.2 says at least 1 ms. |
3744 | */ | |
3745 | msleep(1); | |
3746 | ||
936fd732 TH |
3747 | /* bring link back */ |
3748 | rc = sata_link_resume(link, timing, deadline); | |
9dadd45b TH |
3749 | if (rc) |
3750 | goto out; | |
3751 | /* if link is offline nothing more to do */ | |
b1c72916 | 3752 | if (ata_phys_link_offline(link)) |
9dadd45b TH |
3753 | goto out; |
3754 | ||
3755 | /* Link is online. From this point, -ENODEV too is an error. */ | |
3756 | if (online) | |
3757 | *online = true; | |
3758 | ||
071f44b1 | 3759 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) { |
9dadd45b TH |
3760 | /* If PMP is supported, we have to do follow-up SRST. |
3761 | * Some PMPs don't send D2H Reg FIS after hardreset if | |
3762 | * the first port is empty. Wait only for | |
3763 | * ATA_TMOUT_PMP_SRST_WAIT. | |
3764 | */ | |
3765 | if (check_ready) { | |
3766 | unsigned long pmp_deadline; | |
3767 | ||
341c2c95 TH |
3768 | pmp_deadline = ata_deadline(jiffies, |
3769 | ATA_TMOUT_PMP_SRST_WAIT); | |
9dadd45b TH |
3770 | if (time_after(pmp_deadline, deadline)) |
3771 | pmp_deadline = deadline; | |
3772 | ata_wait_ready(link, pmp_deadline, check_ready); | |
3773 | } | |
3774 | rc = -EAGAIN; | |
3775 | goto out; | |
3776 | } | |
3777 | ||
3778 | rc = 0; | |
3779 | if (check_ready) | |
3780 | rc = ata_wait_ready(link, deadline, check_ready); | |
b6103f6d | 3781 | out: |
0cbf0711 TH |
3782 | if (rc && rc != -EAGAIN) { |
3783 | /* online is set iff link is online && reset succeeded */ | |
3784 | if (online) | |
3785 | *online = false; | |
9dadd45b TH |
3786 | ata_link_printk(link, KERN_ERR, |
3787 | "COMRESET failed (errno=%d)\n", rc); | |
0cbf0711 | 3788 | } |
b6103f6d TH |
3789 | DPRINTK("EXIT, rc=%d\n", rc); |
3790 | return rc; | |
3791 | } | |
3792 | ||
57c9efdf TH |
3793 | /** |
3794 | * sata_std_hardreset - COMRESET w/o waiting or classification | |
3795 | * @link: link to reset | |
3796 | * @class: resulting class of attached device | |
3797 | * @deadline: deadline jiffies for the operation | |
3798 | * | |
3799 | * Standard SATA COMRESET w/o waiting or classification. | |
3800 | * | |
3801 | * LOCKING: | |
3802 | * Kernel thread context (may sleep) | |
3803 | * | |
3804 | * RETURNS: | |
3805 | * 0 if link offline, -EAGAIN if link online, -errno on errors. | |
3806 | */ | |
3807 | int sata_std_hardreset(struct ata_link *link, unsigned int *class, | |
3808 | unsigned long deadline) | |
3809 | { | |
3810 | const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); | |
3811 | bool online; | |
3812 | int rc; | |
3813 | ||
3814 | /* do hardreset */ | |
3815 | rc = sata_link_hardreset(link, timing, deadline, &online, NULL); | |
57c9efdf TH |
3816 | return online ? -EAGAIN : rc; |
3817 | } | |
3818 | ||
c2bd5804 | 3819 | /** |
203c75b8 | 3820 | * ata_std_postreset - standard postreset callback |
cc0680a5 | 3821 | * @link: the target ata_link |
c2bd5804 TH |
3822 | * @classes: classes of attached devices |
3823 | * | |
3824 | * This function is invoked after a successful reset. Note that | |
3825 | * the device might have been reset more than once using | |
3826 | * different reset methods before postreset is invoked. | |
c2bd5804 | 3827 | * |
c2bd5804 TH |
3828 | * LOCKING: |
3829 | * Kernel thread context (may sleep) | |
3830 | */ | |
203c75b8 | 3831 | void ata_std_postreset(struct ata_link *link, unsigned int *classes) |
c2bd5804 | 3832 | { |
f046519f TH |
3833 | u32 serror; |
3834 | ||
c2bd5804 TH |
3835 | DPRINTK("ENTER\n"); |
3836 | ||
f046519f TH |
3837 | /* reset complete, clear SError */ |
3838 | if (!sata_scr_read(link, SCR_ERROR, &serror)) | |
3839 | sata_scr_write(link, SCR_ERROR, serror); | |
3840 | ||
c2bd5804 | 3841 | /* print link status */ |
936fd732 | 3842 | sata_print_link_status(link); |
c2bd5804 | 3843 | |
c2bd5804 TH |
3844 | DPRINTK("EXIT\n"); |
3845 | } | |
3846 | ||
623a3128 TH |
3847 | /** |
3848 | * ata_dev_same_device - Determine whether new ID matches configured device | |
623a3128 TH |
3849 | * @dev: device to compare against |
3850 | * @new_class: class of the new device | |
3851 | * @new_id: IDENTIFY page of the new device | |
3852 | * | |
3853 | * Compare @new_class and @new_id against @dev and determine | |
3854 | * whether @dev is the device indicated by @new_class and | |
3855 | * @new_id. | |
3856 | * | |
3857 | * LOCKING: | |
3858 | * None. | |
3859 | * | |
3860 | * RETURNS: | |
3861 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
3862 | */ | |
3373efd8 TH |
3863 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
3864 | const u16 *new_id) | |
623a3128 TH |
3865 | { |
3866 | const u16 *old_id = dev->id; | |
a0cf733b TH |
3867 | unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
3868 | unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; | |
623a3128 TH |
3869 | |
3870 | if (dev->class != new_class) { | |
f15a1daf TH |
3871 | ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", |
3872 | dev->class, new_class); | |
623a3128 TH |
3873 | return 0; |
3874 | } | |
3875 | ||
a0cf733b TH |
3876 | ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
3877 | ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); | |
3878 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); | |
3879 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); | |
623a3128 TH |
3880 | |
3881 | if (strcmp(model[0], model[1])) { | |
f15a1daf TH |
3882 | ata_dev_printk(dev, KERN_INFO, "model number mismatch " |
3883 | "'%s' != '%s'\n", model[0], model[1]); | |
623a3128 TH |
3884 | return 0; |
3885 | } | |
3886 | ||
3887 | if (strcmp(serial[0], serial[1])) { | |
f15a1daf TH |
3888 | ata_dev_printk(dev, KERN_INFO, "serial number mismatch " |
3889 | "'%s' != '%s'\n", serial[0], serial[1]); | |
623a3128 TH |
3890 | return 0; |
3891 | } | |
3892 | ||
623a3128 TH |
3893 | return 1; |
3894 | } | |
3895 | ||
3896 | /** | |
fe30911b | 3897 | * ata_dev_reread_id - Re-read IDENTIFY data |
3fae450c | 3898 | * @dev: target ATA device |
bff04647 | 3899 | * @readid_flags: read ID flags |
623a3128 TH |
3900 | * |
3901 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
3902 | * the port. | |
3903 | * | |
3904 | * LOCKING: | |
3905 | * Kernel thread context (may sleep) | |
3906 | * | |
3907 | * RETURNS: | |
3908 | * 0 on success, negative errno otherwise | |
3909 | */ | |
fe30911b | 3910 | int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) |
623a3128 | 3911 | { |
5eb45c02 | 3912 | unsigned int class = dev->class; |
9af5c9c9 | 3913 | u16 *id = (void *)dev->link->ap->sector_buf; |
623a3128 TH |
3914 | int rc; |
3915 | ||
fe635c7e | 3916 | /* read ID data */ |
bff04647 | 3917 | rc = ata_dev_read_id(dev, &class, readid_flags, id); |
623a3128 | 3918 | if (rc) |
fe30911b | 3919 | return rc; |
623a3128 TH |
3920 | |
3921 | /* is the device still there? */ | |
fe30911b TH |
3922 | if (!ata_dev_same_device(dev, class, id)) |
3923 | return -ENODEV; | |
623a3128 | 3924 | |
fe635c7e | 3925 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
fe30911b TH |
3926 | return 0; |
3927 | } | |
3928 | ||
3929 | /** | |
3930 | * ata_dev_revalidate - Revalidate ATA device | |
3931 | * @dev: device to revalidate | |
422c9daa | 3932 | * @new_class: new class code |
fe30911b TH |
3933 | * @readid_flags: read ID flags |
3934 | * | |
3935 | * Re-read IDENTIFY page, make sure @dev is still attached to the | |
3936 | * port and reconfigure it according to the new IDENTIFY page. | |
3937 | * | |
3938 | * LOCKING: | |
3939 | * Kernel thread context (may sleep) | |
3940 | * | |
3941 | * RETURNS: | |
3942 | * 0 on success, negative errno otherwise | |
3943 | */ | |
422c9daa TH |
3944 | int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, |
3945 | unsigned int readid_flags) | |
fe30911b | 3946 | { |
6ddcd3b0 | 3947 | u64 n_sectors = dev->n_sectors; |
5920dadf | 3948 | u64 n_native_sectors = dev->n_native_sectors; |
fe30911b TH |
3949 | int rc; |
3950 | ||
3951 | if (!ata_dev_enabled(dev)) | |
3952 | return -ENODEV; | |
3953 | ||
422c9daa TH |
3954 | /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ |
3955 | if (ata_class_enabled(new_class) && | |
f0d0613d BP |
3956 | new_class != ATA_DEV_ATA && |
3957 | new_class != ATA_DEV_ATAPI && | |
3958 | new_class != ATA_DEV_SEMB) { | |
422c9daa TH |
3959 | ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n", |
3960 | dev->class, new_class); | |
3961 | rc = -ENODEV; | |
3962 | goto fail; | |
3963 | } | |
3964 | ||
fe30911b TH |
3965 | /* re-read ID */ |
3966 | rc = ata_dev_reread_id(dev, readid_flags); | |
3967 | if (rc) | |
3968 | goto fail; | |
623a3128 TH |
3969 | |
3970 | /* configure device according to the new ID */ | |
efdaedc4 | 3971 | rc = ata_dev_configure(dev); |
6ddcd3b0 TH |
3972 | if (rc) |
3973 | goto fail; | |
3974 | ||
3975 | /* verify n_sectors hasn't changed */ | |
445d211b TH |
3976 | if (dev->class != ATA_DEV_ATA || !n_sectors || |
3977 | dev->n_sectors == n_sectors) | |
3978 | return 0; | |
3979 | ||
3980 | /* n_sectors has changed */ | |
3981 | ata_dev_printk(dev, KERN_WARNING, "n_sectors mismatch %llu != %llu\n", | |
3982 | (unsigned long long)n_sectors, | |
3983 | (unsigned long long)dev->n_sectors); | |
3984 | ||
3985 | /* | |
3986 | * Something could have caused HPA to be unlocked | |
3987 | * involuntarily. If n_native_sectors hasn't changed and the | |
3988 | * new size matches it, keep the device. | |
3989 | */ | |
3990 | if (dev->n_native_sectors == n_native_sectors && | |
3991 | dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) { | |
3992 | ata_dev_printk(dev, KERN_WARNING, | |
3993 | "new n_sectors matches native, probably " | |
68939ce5 TH |
3994 | "late HPA unlock, n_sectors updated\n"); |
3995 | /* use the larger n_sectors */ | |
445d211b | 3996 | return 0; |
6ddcd3b0 TH |
3997 | } |
3998 | ||
445d211b TH |
3999 | /* |
4000 | * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try | |
4001 | * unlocking HPA in those cases. | |
4002 | * | |
4003 | * https://bugzilla.kernel.org/show_bug.cgi?id=15396 | |
4004 | */ | |
4005 | if (dev->n_native_sectors == n_native_sectors && | |
4006 | dev->n_sectors < n_sectors && n_sectors == n_native_sectors && | |
4007 | !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) { | |
4008 | ata_dev_printk(dev, KERN_WARNING, | |
4009 | "old n_sectors matches native, probably " | |
4010 | "late HPA lock, will try to unlock HPA\n"); | |
4011 | /* try unlocking HPA */ | |
4012 | dev->flags |= ATA_DFLAG_UNLOCK_HPA; | |
4013 | rc = -EIO; | |
4014 | } else | |
4015 | rc = -ENODEV; | |
623a3128 | 4016 | |
445d211b TH |
4017 | /* restore original n_[native_]sectors and fail */ |
4018 | dev->n_native_sectors = n_native_sectors; | |
4019 | dev->n_sectors = n_sectors; | |
623a3128 | 4020 | fail: |
f15a1daf | 4021 | ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); |
623a3128 TH |
4022 | return rc; |
4023 | } | |
4024 | ||
6919a0a6 AC |
4025 | struct ata_blacklist_entry { |
4026 | const char *model_num; | |
4027 | const char *model_rev; | |
4028 | unsigned long horkage; | |
4029 | }; | |
4030 | ||
4031 | static const struct ata_blacklist_entry ata_device_blacklist [] = { | |
4032 | /* Devices with DMA related problems under Linux */ | |
4033 | { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, | |
4034 | { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, | |
4035 | { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, | |
4036 | { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, | |
4037 | { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, | |
4038 | { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, | |
4039 | { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, | |
4040 | { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, | |
4041 | { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, | |
7da4c935 | 4042 | { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA }, |
6919a0a6 AC |
4043 | { "CRD-84", NULL, ATA_HORKAGE_NODMA }, |
4044 | { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, | |
4045 | { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, | |
4046 | { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, | |
4047 | { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, | |
7da4c935 | 4048 | { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA }, |
6919a0a6 AC |
4049 | { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, |
4050 | { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, | |
4051 | { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, | |
4052 | { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, | |
4053 | { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, | |
4054 | { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, | |
4055 | { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, | |
4056 | { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, | |
6919a0a6 AC |
4057 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
4058 | { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, | |
2dcb407e | 4059 | { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA }, |
39f19886 | 4060 | { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, |
3af9a77a | 4061 | /* Odd clown on sil3726/4726 PMPs */ |
50af2fa1 | 4062 | { "Config Disk", NULL, ATA_HORKAGE_DISABLE }, |
6919a0a6 | 4063 | |
18d6e9d5 | 4064 | /* Weird ATAPI devices */ |
40a1d531 | 4065 | { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, |
6a87e42e | 4066 | { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA }, |
18d6e9d5 | 4067 | |
6919a0a6 AC |
4068 | /* Devices we expect to fail diagnostics */ |
4069 | ||
4070 | /* Devices where NCQ should be avoided */ | |
4071 | /* NCQ is slow */ | |
2dcb407e | 4072 | { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, |
459ad688 | 4073 | { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, |
09125ea6 TH |
4074 | /* http://thread.gmane.org/gmane.linux.ide/14907 */ |
4075 | { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, | |
7acfaf30 | 4076 | /* NCQ is broken */ |
539cc7c7 | 4077 | { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, |
0e3dbc01 | 4078 | { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, |
da6f0ec2 | 4079 | { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, |
e41bd3e8 | 4080 | { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ }, |
5ccfca97 | 4081 | { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ }, |
539cc7c7 | 4082 | |
ac70a964 | 4083 | /* Seagate NCQ + FLUSH CACHE firmware bug */ |
4d1f9082 | 4084 | { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | |
ac70a964 | 4085 | ATA_HORKAGE_FIRMWARE_WARN }, |
d10d491f | 4086 | |
4d1f9082 | 4087 | { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | |
d10d491f TH |
4088 | ATA_HORKAGE_FIRMWARE_WARN }, |
4089 | ||
4d1f9082 | 4090 | { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | |
d10d491f TH |
4091 | ATA_HORKAGE_FIRMWARE_WARN }, |
4092 | ||
4d1f9082 | 4093 | { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | |
ac70a964 TH |
4094 | ATA_HORKAGE_FIRMWARE_WARN }, |
4095 | ||
36e337d0 RH |
4096 | /* Blacklist entries taken from Silicon Image 3124/3132 |
4097 | Windows driver .inf file - also several Linux problem reports */ | |
4098 | { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, | |
4099 | { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, | |
4100 | { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, | |
6919a0a6 | 4101 | |
68b0ddb2 TH |
4102 | /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */ |
4103 | { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, }, | |
4104 | ||
16c55b03 TH |
4105 | /* devices which puke on READ_NATIVE_MAX */ |
4106 | { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, | |
4107 | { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, | |
4108 | { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, | |
4109 | { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, | |
6919a0a6 | 4110 | |
7831387b TH |
4111 | /* this one allows HPA unlocking but fails IOs on the area */ |
4112 | { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA }, | |
4113 | ||
93328e11 AC |
4114 | /* Devices which report 1 sector over size HPA */ |
4115 | { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
4116 | { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
b152fcd3 | 4117 | { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, }, |
93328e11 | 4118 | |
6bbfd53d AC |
4119 | /* Devices which get the IVB wrong */ |
4120 | { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, }, | |
a79067e5 | 4121 | /* Maybe we should just blacklist TSSTcorp... */ |
7da4c935 | 4122 | { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, }, |
6bbfd53d | 4123 | |
9ce8e307 JA |
4124 | /* Devices that do not need bridging limits applied */ |
4125 | { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, }, | |
4126 | ||
9062712f TH |
4127 | /* Devices which aren't very happy with higher link speeds */ |
4128 | { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, }, | |
4129 | ||
d0cb43b3 TH |
4130 | /* |
4131 | * Devices which choke on SETXFER. Applies only if both the | |
4132 | * device and controller are SATA. | |
4133 | */ | |
4134 | { "PIONEER DVD-RW DVRTD08", "1.00", ATA_HORKAGE_NOSETXFER }, | |
4135 | ||
6919a0a6 AC |
4136 | /* End Marker */ |
4137 | { } | |
1da177e4 | 4138 | }; |
2e9edbf8 | 4139 | |
bce036ce ML |
4140 | /** |
4141 | * glob_match - match a text string against a glob-style pattern | |
4142 | * @text: the string to be examined | |
4143 | * @pattern: the glob-style pattern to be matched against | |
4144 | * | |
4145 | * Either/both of text and pattern can be empty strings. | |
4146 | * | |
4147 | * Match text against a glob-style pattern, with wildcards and simple sets: | |
4148 | * | |
4149 | * ? matches any single character. | |
4150 | * * matches any run of characters. | |
4151 | * [xyz] matches a single character from the set: x, y, or z. | |
2f9e4d16 ML |
4152 | * [a-d] matches a single character from the range: a, b, c, or d. |
4153 | * [a-d0-9] matches a single character from either range. | |
bce036ce | 4154 | * |
2f9e4d16 ML |
4155 | * The special characters ?, [, -, or *, can be matched using a set, eg. [*] |
4156 | * Behaviour with malformed patterns is undefined, though generally reasonable. | |
bce036ce | 4157 | * |
3d2be54b | 4158 | * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx" |
bce036ce ML |
4159 | * |
4160 | * This function uses one level of recursion per '*' in pattern. | |
4161 | * Since it calls _nothing_ else, and has _no_ explicit local variables, | |
4162 | * this will not cause stack problems for any reasonable use here. | |
4163 | * | |
4164 | * RETURNS: | |
4165 | * 0 on match, 1 otherwise. | |
4166 | */ | |
4167 | static int glob_match (const char *text, const char *pattern) | |
539cc7c7 | 4168 | { |
bce036ce ML |
4169 | do { |
4170 | /* Match single character or a '?' wildcard */ | |
4171 | if (*text == *pattern || *pattern == '?') { | |
4172 | if (!*pattern++) | |
4173 | return 0; /* End of both strings: match */ | |
4174 | } else { | |
4175 | /* Match single char against a '[' bracketed ']' pattern set */ | |
4176 | if (!*text || *pattern != '[') | |
4177 | break; /* Not a pattern set */ | |
2f9e4d16 ML |
4178 | while (*++pattern && *pattern != ']' && *text != *pattern) { |
4179 | if (*pattern == '-' && *(pattern - 1) != '[') | |
4180 | if (*text > *(pattern - 1) && *text < *(pattern + 1)) { | |
4181 | ++pattern; | |
4182 | break; | |
4183 | } | |
4184 | } | |
bce036ce ML |
4185 | if (!*pattern || *pattern == ']') |
4186 | return 1; /* No match */ | |
4187 | while (*pattern && *pattern++ != ']'); | |
4188 | } | |
4189 | } while (*++text && *pattern); | |
4190 | ||
4191 | /* Match any run of chars against a '*' wildcard */ | |
4192 | if (*pattern == '*') { | |
4193 | if (!*++pattern) | |
4194 | return 0; /* Match: avoid recursion at end of pattern */ | |
4195 | /* Loop to handle additional pattern chars after the wildcard */ | |
4196 | while (*text) { | |
4197 | if (glob_match(text, pattern) == 0) | |
4198 | return 0; /* Remainder matched */ | |
4199 | ++text; /* Absorb (match) this char and try again */ | |
317b50b8 AP |
4200 | } |
4201 | } | |
bce036ce ML |
4202 | if (!*text && !*pattern) |
4203 | return 0; /* End of both strings: match */ | |
4204 | return 1; /* No match */ | |
539cc7c7 | 4205 | } |
bce036ce | 4206 | |
75683fe7 | 4207 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev) |
1da177e4 | 4208 | { |
8bfa79fc TH |
4209 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
4210 | unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; | |
6919a0a6 | 4211 | const struct ata_blacklist_entry *ad = ata_device_blacklist; |
3a778275 | 4212 | |
8bfa79fc TH |
4213 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
4214 | ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); | |
1da177e4 | 4215 | |
6919a0a6 | 4216 | while (ad->model_num) { |
bce036ce | 4217 | if (!glob_match(model_num, ad->model_num)) { |
6919a0a6 AC |
4218 | if (ad->model_rev == NULL) |
4219 | return ad->horkage; | |
bce036ce | 4220 | if (!glob_match(model_rev, ad->model_rev)) |
6919a0a6 | 4221 | return ad->horkage; |
f4b15fef | 4222 | } |
6919a0a6 | 4223 | ad++; |
f4b15fef | 4224 | } |
1da177e4 LT |
4225 | return 0; |
4226 | } | |
4227 | ||
6919a0a6 AC |
4228 | static int ata_dma_blacklisted(const struct ata_device *dev) |
4229 | { | |
4230 | /* We don't support polling DMA. | |
4231 | * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) | |
4232 | * if the LLDD handles only interrupts in the HSM_ST_LAST state. | |
4233 | */ | |
9af5c9c9 | 4234 | if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && |
6919a0a6 AC |
4235 | (dev->flags & ATA_DFLAG_CDB_INTR)) |
4236 | return 1; | |
75683fe7 | 4237 | return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; |
6919a0a6 AC |
4238 | } |
4239 | ||
6bbfd53d AC |
4240 | /** |
4241 | * ata_is_40wire - check drive side detection | |
4242 | * @dev: device | |
4243 | * | |
4244 | * Perform drive side detection decoding, allowing for device vendors | |
4245 | * who can't follow the documentation. | |
4246 | */ | |
4247 | ||
4248 | static int ata_is_40wire(struct ata_device *dev) | |
4249 | { | |
4250 | if (dev->horkage & ATA_HORKAGE_IVB) | |
4251 | return ata_drive_40wire_relaxed(dev->id); | |
4252 | return ata_drive_40wire(dev->id); | |
4253 | } | |
4254 | ||
15a5551c AC |
4255 | /** |
4256 | * cable_is_40wire - 40/80/SATA decider | |
4257 | * @ap: port to consider | |
4258 | * | |
4259 | * This function encapsulates the policy for speed management | |
4260 | * in one place. At the moment we don't cache the result but | |
4261 | * there is a good case for setting ap->cbl to the result when | |
4262 | * we are called with unknown cables (and figuring out if it | |
4263 | * impacts hotplug at all). | |
4264 | * | |
4265 | * Return 1 if the cable appears to be 40 wire. | |
4266 | */ | |
4267 | ||
4268 | static int cable_is_40wire(struct ata_port *ap) | |
4269 | { | |
4270 | struct ata_link *link; | |
4271 | struct ata_device *dev; | |
4272 | ||
4a9c7b33 | 4273 | /* If the controller thinks we are 40 wire, we are. */ |
15a5551c AC |
4274 | if (ap->cbl == ATA_CBL_PATA40) |
4275 | return 1; | |
4a9c7b33 TH |
4276 | |
4277 | /* If the controller thinks we are 80 wire, we are. */ | |
15a5551c AC |
4278 | if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA) |
4279 | return 0; | |
4a9c7b33 TH |
4280 | |
4281 | /* If the system is known to be 40 wire short cable (eg | |
4282 | * laptop), then we allow 80 wire modes even if the drive | |
4283 | * isn't sure. | |
4284 | */ | |
f792068e AC |
4285 | if (ap->cbl == ATA_CBL_PATA40_SHORT) |
4286 | return 0; | |
4a9c7b33 TH |
4287 | |
4288 | /* If the controller doesn't know, we scan. | |
4289 | * | |
4290 | * Note: We look for all 40 wire detects at this point. Any | |
4291 | * 80 wire detect is taken to be 80 wire cable because | |
4292 | * - in many setups only the one drive (slave if present) will | |
4293 | * give a valid detect | |
4294 | * - if you have a non detect capable drive you don't want it | |
4295 | * to colour the choice | |
4296 | */ | |
1eca4365 TH |
4297 | ata_for_each_link(link, ap, EDGE) { |
4298 | ata_for_each_dev(dev, link, ENABLED) { | |
4299 | if (!ata_is_40wire(dev)) | |
15a5551c AC |
4300 | return 0; |
4301 | } | |
4302 | } | |
4303 | return 1; | |
4304 | } | |
4305 | ||
a6d5a51c TH |
4306 | /** |
4307 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
a6d5a51c TH |
4308 | * @dev: Device to compute xfermask for |
4309 | * | |
acf356b1 TH |
4310 | * Compute supported xfermask of @dev and store it in |
4311 | * dev->*_mask. This function is responsible for applying all | |
4312 | * known limits including host controller limits, device | |
4313 | * blacklist, etc... | |
a6d5a51c TH |
4314 | * |
4315 | * LOCKING: | |
4316 | * None. | |
a6d5a51c | 4317 | */ |
3373efd8 | 4318 | static void ata_dev_xfermask(struct ata_device *dev) |
1da177e4 | 4319 | { |
9af5c9c9 TH |
4320 | struct ata_link *link = dev->link; |
4321 | struct ata_port *ap = link->ap; | |
cca3974e | 4322 | struct ata_host *host = ap->host; |
a6d5a51c | 4323 | unsigned long xfer_mask; |
1da177e4 | 4324 | |
37deecb5 | 4325 | /* controller modes available */ |
565083e1 TH |
4326 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
4327 | ap->mwdma_mask, ap->udma_mask); | |
4328 | ||
8343f889 | 4329 | /* drive modes available */ |
37deecb5 TH |
4330 | xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
4331 | dev->mwdma_mask, dev->udma_mask); | |
4332 | xfer_mask &= ata_id_xfermask(dev->id); | |
565083e1 | 4333 | |
b352e57d AC |
4334 | /* |
4335 | * CFA Advanced TrueIDE timings are not allowed on a shared | |
4336 | * cable | |
4337 | */ | |
4338 | if (ata_dev_pair(dev)) { | |
4339 | /* No PIO5 or PIO6 */ | |
4340 | xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); | |
4341 | /* No MWDMA3 or MWDMA 4 */ | |
4342 | xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); | |
4343 | } | |
4344 | ||
37deecb5 TH |
4345 | if (ata_dma_blacklisted(dev)) { |
4346 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
f15a1daf TH |
4347 | ata_dev_printk(dev, KERN_WARNING, |
4348 | "device is on DMA blacklist, disabling DMA\n"); | |
37deecb5 | 4349 | } |
a6d5a51c | 4350 | |
14d66ab7 | 4351 | if ((host->flags & ATA_HOST_SIMPLEX) && |
2dcb407e | 4352 | host->simplex_claimed && host->simplex_claimed != ap) { |
37deecb5 TH |
4353 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
4354 | ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " | |
4355 | "other device, disabling DMA\n"); | |
5444a6f4 | 4356 | } |
565083e1 | 4357 | |
e424675f JG |
4358 | if (ap->flags & ATA_FLAG_NO_IORDY) |
4359 | xfer_mask &= ata_pio_mask_no_iordy(dev); | |
4360 | ||
5444a6f4 | 4361 | if (ap->ops->mode_filter) |
a76b62ca | 4362 | xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
5444a6f4 | 4363 | |
8343f889 RH |
4364 | /* Apply cable rule here. Don't apply it early because when |
4365 | * we handle hot plug the cable type can itself change. | |
4366 | * Check this last so that we know if the transfer rate was | |
4367 | * solely limited by the cable. | |
4368 | * Unknown or 80 wire cables reported host side are checked | |
4369 | * drive side as well. Cases where we know a 40wire cable | |
4370 | * is used safely for 80 are not checked here. | |
4371 | */ | |
4372 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) | |
4373 | /* UDMA/44 or higher would be available */ | |
15a5551c | 4374 | if (cable_is_40wire(ap)) { |
2dcb407e | 4375 | ata_dev_printk(dev, KERN_WARNING, |
8343f889 RH |
4376 | "limited to UDMA/33 due to 40-wire cable\n"); |
4377 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); | |
4378 | } | |
4379 | ||
565083e1 TH |
4380 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
4381 | &dev->mwdma_mask, &dev->udma_mask); | |
1da177e4 LT |
4382 | } |
4383 | ||
1da177e4 LT |
4384 | /** |
4385 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
1da177e4 LT |
4386 | * @dev: Device to which command will be sent |
4387 | * | |
780a87f7 JG |
4388 | * Issue SET FEATURES - XFER MODE command to device @dev |
4389 | * on port @ap. | |
4390 | * | |
1da177e4 | 4391 | * LOCKING: |
0cba632b | 4392 | * PCI/etc. bus probe sem. |
83206a29 TH |
4393 | * |
4394 | * RETURNS: | |
4395 | * 0 on success, AC_ERR_* mask otherwise. | |
1da177e4 LT |
4396 | */ |
4397 | ||
3373efd8 | 4398 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
1da177e4 | 4399 | { |
a0123703 | 4400 | struct ata_taskfile tf; |
83206a29 | 4401 | unsigned int err_mask; |
1da177e4 LT |
4402 | |
4403 | /* set up set-features taskfile */ | |
4404 | DPRINTK("set features - xfer mode\n"); | |
4405 | ||
464cf177 TH |
4406 | /* Some controllers and ATAPI devices show flaky interrupt |
4407 | * behavior after setting xfer mode. Use polling instead. | |
4408 | */ | |
3373efd8 | 4409 | ata_tf_init(dev, &tf); |
a0123703 TH |
4410 | tf.command = ATA_CMD_SET_FEATURES; |
4411 | tf.feature = SETFEATURES_XFER; | |
464cf177 | 4412 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; |
a0123703 | 4413 | tf.protocol = ATA_PROT_NODATA; |
b9f8ab2d | 4414 | /* If we are using IORDY we must send the mode setting command */ |
11b7becc JG |
4415 | if (ata_pio_need_iordy(dev)) |
4416 | tf.nsect = dev->xfer_mode; | |
b9f8ab2d AC |
4417 | /* If the device has IORDY and the controller does not - turn it off */ |
4418 | else if (ata_id_has_iordy(dev->id)) | |
11b7becc | 4419 | tf.nsect = 0x01; |
b9f8ab2d AC |
4420 | else /* In the ancient relic department - skip all of this */ |
4421 | return 0; | |
1da177e4 | 4422 | |
2b789108 | 4423 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
9f45cbd3 KCA |
4424 | |
4425 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
4426 | return err_mask; | |
4427 | } | |
1152b261 | 4428 | |
9f45cbd3 | 4429 | /** |
218f3d30 | 4430 | * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES |
9f45cbd3 KCA |
4431 | * @dev: Device to which command will be sent |
4432 | * @enable: Whether to enable or disable the feature | |
218f3d30 | 4433 | * @feature: The sector count represents the feature to set |
9f45cbd3 KCA |
4434 | * |
4435 | * Issue SET FEATURES - SATA FEATURES command to device @dev | |
218f3d30 | 4436 | * on port @ap with sector count |
9f45cbd3 KCA |
4437 | * |
4438 | * LOCKING: | |
4439 | * PCI/etc. bus probe sem. | |
4440 | * | |
4441 | * RETURNS: | |
4442 | * 0 on success, AC_ERR_* mask otherwise. | |
4443 | */ | |
1152b261 | 4444 | unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature) |
9f45cbd3 KCA |
4445 | { |
4446 | struct ata_taskfile tf; | |
4447 | unsigned int err_mask; | |
4448 | ||
4449 | /* set up set-features taskfile */ | |
4450 | DPRINTK("set features - SATA features\n"); | |
4451 | ||
4452 | ata_tf_init(dev, &tf); | |
4453 | tf.command = ATA_CMD_SET_FEATURES; | |
4454 | tf.feature = enable; | |
4455 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4456 | tf.protocol = ATA_PROT_NODATA; | |
218f3d30 | 4457 | tf.nsect = feature; |
9f45cbd3 | 4458 | |
2b789108 | 4459 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
1da177e4 | 4460 | |
83206a29 TH |
4461 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4462 | return err_mask; | |
1da177e4 LT |
4463 | } |
4464 | ||
8bf62ece AL |
4465 | /** |
4466 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
8bf62ece | 4467 | * @dev: Device to which command will be sent |
e2a7f77a RD |
4468 | * @heads: Number of heads (taskfile parameter) |
4469 | * @sectors: Number of sectors (taskfile parameter) | |
8bf62ece AL |
4470 | * |
4471 | * LOCKING: | |
6aff8f1f TH |
4472 | * Kernel thread context (may sleep) |
4473 | * | |
4474 | * RETURNS: | |
4475 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece | 4476 | */ |
3373efd8 TH |
4477 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
4478 | u16 heads, u16 sectors) | |
8bf62ece | 4479 | { |
a0123703 | 4480 | struct ata_taskfile tf; |
6aff8f1f | 4481 | unsigned int err_mask; |
8bf62ece AL |
4482 | |
4483 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
4484 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
00b6f5e9 | 4485 | return AC_ERR_INVALID; |
8bf62ece AL |
4486 | |
4487 | /* set up init dev params taskfile */ | |
4488 | DPRINTK("init dev params \n"); | |
4489 | ||
3373efd8 | 4490 | ata_tf_init(dev, &tf); |
a0123703 TH |
4491 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
4492 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4493 | tf.protocol = ATA_PROT_NODATA; | |
4494 | tf.nsect = sectors; | |
4495 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 4496 | |
2b789108 | 4497 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
18b2466c AC |
4498 | /* A clean abort indicates an original or just out of spec drive |
4499 | and we should continue as we issue the setup based on the | |
4500 | drive reported working geometry */ | |
4501 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
4502 | err_mask = 0; | |
8bf62ece | 4503 | |
6aff8f1f TH |
4504 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4505 | return err_mask; | |
8bf62ece AL |
4506 | } |
4507 | ||
1da177e4 | 4508 | /** |
0cba632b JG |
4509 | * ata_sg_clean - Unmap DMA memory associated with command |
4510 | * @qc: Command containing DMA memory to be released | |
4511 | * | |
4512 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
4513 | * |
4514 | * LOCKING: | |
cca3974e | 4515 | * spin_lock_irqsave(host lock) |
1da177e4 | 4516 | */ |
70e6ad0c | 4517 | void ata_sg_clean(struct ata_queued_cmd *qc) |
1da177e4 LT |
4518 | { |
4519 | struct ata_port *ap = qc->ap; | |
ff2aeb1e | 4520 | struct scatterlist *sg = qc->sg; |
1da177e4 LT |
4521 | int dir = qc->dma_dir; |
4522 | ||
efcb3cf7 | 4523 | WARN_ON_ONCE(sg == NULL); |
1da177e4 | 4524 | |
dde20207 | 4525 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 4526 | |
dde20207 | 4527 | if (qc->n_elem) |
5825627c | 4528 | dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir); |
1da177e4 LT |
4529 | |
4530 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
ff2aeb1e | 4531 | qc->sg = NULL; |
1da177e4 LT |
4532 | } |
4533 | ||
1da177e4 | 4534 | /** |
5895ef9a | 4535 | * atapi_check_dma - Check whether ATAPI DMA can be supported |
1da177e4 LT |
4536 | * @qc: Metadata associated with taskfile to check |
4537 | * | |
780a87f7 JG |
4538 | * Allow low-level driver to filter ATA PACKET commands, returning |
4539 | * a status indicating whether or not it is OK to use DMA for the | |
4540 | * supplied PACKET command. | |
4541 | * | |
1da177e4 | 4542 | * LOCKING: |
624d5c51 TH |
4543 | * spin_lock_irqsave(host lock) |
4544 | * | |
4545 | * RETURNS: 0 when ATAPI DMA can be used | |
4546 | * nonzero otherwise | |
4547 | */ | |
5895ef9a | 4548 | int atapi_check_dma(struct ata_queued_cmd *qc) |
624d5c51 TH |
4549 | { |
4550 | struct ata_port *ap = qc->ap; | |
71601958 | 4551 | |
624d5c51 TH |
4552 | /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a |
4553 | * few ATAPI devices choke on such DMA requests. | |
4554 | */ | |
6a87e42e TH |
4555 | if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) && |
4556 | unlikely(qc->nbytes & 15)) | |
624d5c51 | 4557 | return 1; |
e2cec771 | 4558 | |
624d5c51 TH |
4559 | if (ap->ops->check_atapi_dma) |
4560 | return ap->ops->check_atapi_dma(qc); | |
e2cec771 | 4561 | |
624d5c51 TH |
4562 | return 0; |
4563 | } | |
1da177e4 | 4564 | |
624d5c51 TH |
4565 | /** |
4566 | * ata_std_qc_defer - Check whether a qc needs to be deferred | |
4567 | * @qc: ATA command in question | |
4568 | * | |
4569 | * Non-NCQ commands cannot run with any other command, NCQ or | |
4570 | * not. As upper layer only knows the queue depth, we are | |
4571 | * responsible for maintaining exclusion. This function checks | |
4572 | * whether a new command @qc can be issued. | |
4573 | * | |
4574 | * LOCKING: | |
4575 | * spin_lock_irqsave(host lock) | |
4576 | * | |
4577 | * RETURNS: | |
4578 | * ATA_DEFER_* if deferring is needed, 0 otherwise. | |
4579 | */ | |
4580 | int ata_std_qc_defer(struct ata_queued_cmd *qc) | |
4581 | { | |
4582 | struct ata_link *link = qc->dev->link; | |
e2cec771 | 4583 | |
624d5c51 TH |
4584 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
4585 | if (!ata_tag_valid(link->active_tag)) | |
4586 | return 0; | |
4587 | } else { | |
4588 | if (!ata_tag_valid(link->active_tag) && !link->sactive) | |
4589 | return 0; | |
4590 | } | |
e2cec771 | 4591 | |
624d5c51 TH |
4592 | return ATA_DEFER_LINK; |
4593 | } | |
6912ccd5 | 4594 | |
624d5c51 | 4595 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
1da177e4 | 4596 | |
624d5c51 TH |
4597 | /** |
4598 | * ata_sg_init - Associate command with scatter-gather table. | |
4599 | * @qc: Command to be associated | |
4600 | * @sg: Scatter-gather table. | |
4601 | * @n_elem: Number of elements in s/g table. | |
4602 | * | |
4603 | * Initialize the data-related elements of queued_cmd @qc | |
4604 | * to point to a scatter-gather table @sg, containing @n_elem | |
4605 | * elements. | |
4606 | * | |
4607 | * LOCKING: | |
4608 | * spin_lock_irqsave(host lock) | |
4609 | */ | |
4610 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, | |
4611 | unsigned int n_elem) | |
4612 | { | |
4613 | qc->sg = sg; | |
4614 | qc->n_elem = n_elem; | |
4615 | qc->cursg = qc->sg; | |
4616 | } | |
bb5cb290 | 4617 | |
624d5c51 TH |
4618 | /** |
4619 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. | |
4620 | * @qc: Command with scatter-gather table to be mapped. | |
4621 | * | |
4622 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
4623 | * | |
4624 | * LOCKING: | |
4625 | * spin_lock_irqsave(host lock) | |
4626 | * | |
4627 | * RETURNS: | |
4628 | * Zero on success, negative on error. | |
4629 | * | |
4630 | */ | |
4631 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
4632 | { | |
4633 | struct ata_port *ap = qc->ap; | |
4634 | unsigned int n_elem; | |
1da177e4 | 4635 | |
624d5c51 | 4636 | VPRINTK("ENTER, ata%u\n", ap->print_id); |
e2cec771 | 4637 | |
624d5c51 TH |
4638 | n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); |
4639 | if (n_elem < 1) | |
4640 | return -1; | |
bb5cb290 | 4641 | |
624d5c51 | 4642 | DPRINTK("%d sg elements mapped\n", n_elem); |
5825627c | 4643 | qc->orig_n_elem = qc->n_elem; |
624d5c51 TH |
4644 | qc->n_elem = n_elem; |
4645 | qc->flags |= ATA_QCFLAG_DMAMAP; | |
1da177e4 | 4646 | |
624d5c51 | 4647 | return 0; |
1da177e4 LT |
4648 | } |
4649 | ||
624d5c51 TH |
4650 | /** |
4651 | * swap_buf_le16 - swap halves of 16-bit words in place | |
4652 | * @buf: Buffer to swap | |
4653 | * @buf_words: Number of 16-bit words in buffer. | |
4654 | * | |
4655 | * Swap halves of 16-bit words if needed to convert from | |
4656 | * little-endian byte order to native cpu byte order, or | |
4657 | * vice-versa. | |
4658 | * | |
4659 | * LOCKING: | |
4660 | * Inherited from caller. | |
4661 | */ | |
4662 | void swap_buf_le16(u16 *buf, unsigned int buf_words) | |
8061f5f0 | 4663 | { |
624d5c51 TH |
4664 | #ifdef __BIG_ENDIAN |
4665 | unsigned int i; | |
8061f5f0 | 4666 | |
624d5c51 TH |
4667 | for (i = 0; i < buf_words; i++) |
4668 | buf[i] = le16_to_cpu(buf[i]); | |
4669 | #endif /* __BIG_ENDIAN */ | |
8061f5f0 TH |
4670 | } |
4671 | ||
8a8bc223 TH |
4672 | /** |
4673 | * ata_qc_new - Request an available ATA command, for queueing | |
5eb66fe0 | 4674 | * @ap: target port |
8a8bc223 TH |
4675 | * |
4676 | * LOCKING: | |
4677 | * None. | |
4678 | */ | |
4679 | ||
4680 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
4681 | { | |
4682 | struct ata_queued_cmd *qc = NULL; | |
4683 | unsigned int i; | |
4684 | ||
4685 | /* no command while frozen */ | |
4686 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) | |
4687 | return NULL; | |
4688 | ||
4689 | /* the last tag is reserved for internal command. */ | |
4690 | for (i = 0; i < ATA_MAX_QUEUE - 1; i++) | |
4691 | if (!test_and_set_bit(i, &ap->qc_allocated)) { | |
4692 | qc = __ata_qc_from_tag(ap, i); | |
4693 | break; | |
4694 | } | |
4695 | ||
4696 | if (qc) | |
4697 | qc->tag = i; | |
4698 | ||
4699 | return qc; | |
4700 | } | |
4701 | ||
1da177e4 LT |
4702 | /** |
4703 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
1da177e4 LT |
4704 | * @dev: Device from whom we request an available command structure |
4705 | * | |
4706 | * LOCKING: | |
0cba632b | 4707 | * None. |
1da177e4 LT |
4708 | */ |
4709 | ||
8a8bc223 | 4710 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) |
1da177e4 | 4711 | { |
9af5c9c9 | 4712 | struct ata_port *ap = dev->link->ap; |
1da177e4 LT |
4713 | struct ata_queued_cmd *qc; |
4714 | ||
8a8bc223 | 4715 | qc = ata_qc_new(ap); |
1da177e4 | 4716 | if (qc) { |
1da177e4 LT |
4717 | qc->scsicmd = NULL; |
4718 | qc->ap = ap; | |
4719 | qc->dev = dev; | |
1da177e4 | 4720 | |
2c13b7ce | 4721 | ata_qc_reinit(qc); |
1da177e4 LT |
4722 | } |
4723 | ||
4724 | return qc; | |
4725 | } | |
4726 | ||
8a8bc223 TH |
4727 | /** |
4728 | * ata_qc_free - free unused ata_queued_cmd | |
4729 | * @qc: Command to complete | |
4730 | * | |
4731 | * Designed to free unused ata_queued_cmd object | |
4732 | * in case something prevents using it. | |
4733 | * | |
4734 | * LOCKING: | |
4735 | * spin_lock_irqsave(host lock) | |
4736 | */ | |
4737 | void ata_qc_free(struct ata_queued_cmd *qc) | |
4738 | { | |
a1104016 | 4739 | struct ata_port *ap; |
8a8bc223 TH |
4740 | unsigned int tag; |
4741 | ||
efcb3cf7 | 4742 | WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
a1104016 | 4743 | ap = qc->ap; |
8a8bc223 TH |
4744 | |
4745 | qc->flags = 0; | |
4746 | tag = qc->tag; | |
4747 | if (likely(ata_tag_valid(tag))) { | |
4748 | qc->tag = ATA_TAG_POISON; | |
4749 | clear_bit(tag, &ap->qc_allocated); | |
4750 | } | |
4751 | } | |
4752 | ||
76014427 | 4753 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 4754 | { |
a1104016 JL |
4755 | struct ata_port *ap; |
4756 | struct ata_link *link; | |
dedaf2b0 | 4757 | |
efcb3cf7 TH |
4758 | WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
4759 | WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
a1104016 JL |
4760 | ap = qc->ap; |
4761 | link = qc->dev->link; | |
1da177e4 LT |
4762 | |
4763 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4764 | ata_sg_clean(qc); | |
4765 | ||
7401abf2 | 4766 | /* command should be marked inactive atomically with qc completion */ |
da917d69 | 4767 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
9af5c9c9 | 4768 | link->sactive &= ~(1 << qc->tag); |
da917d69 TH |
4769 | if (!link->sactive) |
4770 | ap->nr_active_links--; | |
4771 | } else { | |
9af5c9c9 | 4772 | link->active_tag = ATA_TAG_POISON; |
da917d69 TH |
4773 | ap->nr_active_links--; |
4774 | } | |
4775 | ||
4776 | /* clear exclusive status */ | |
4777 | if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && | |
4778 | ap->excl_link == link)) | |
4779 | ap->excl_link = NULL; | |
7401abf2 | 4780 | |
3f3791d3 AL |
4781 | /* atapi: mark qc as inactive to prevent the interrupt handler |
4782 | * from completing the command twice later, before the error handler | |
4783 | * is called. (when rc != 0 and atapi request sense is needed) | |
4784 | */ | |
4785 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
dedaf2b0 | 4786 | ap->qc_active &= ~(1 << qc->tag); |
3f3791d3 | 4787 | |
1da177e4 | 4788 | /* call completion callback */ |
77853bf2 | 4789 | qc->complete_fn(qc); |
1da177e4 LT |
4790 | } |
4791 | ||
39599a53 TH |
4792 | static void fill_result_tf(struct ata_queued_cmd *qc) |
4793 | { | |
4794 | struct ata_port *ap = qc->ap; | |
4795 | ||
39599a53 | 4796 | qc->result_tf.flags = qc->tf.flags; |
22183bf5 | 4797 | ap->ops->qc_fill_rtf(qc); |
39599a53 TH |
4798 | } |
4799 | ||
00115e0f TH |
4800 | static void ata_verify_xfer(struct ata_queued_cmd *qc) |
4801 | { | |
4802 | struct ata_device *dev = qc->dev; | |
4803 | ||
4804 | if (ata_tag_internal(qc->tag)) | |
4805 | return; | |
4806 | ||
4807 | if (ata_is_nodata(qc->tf.protocol)) | |
4808 | return; | |
4809 | ||
4810 | if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) | |
4811 | return; | |
4812 | ||
4813 | dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; | |
4814 | } | |
4815 | ||
f686bcb8 TH |
4816 | /** |
4817 | * ata_qc_complete - Complete an active ATA command | |
4818 | * @qc: Command to complete | |
f686bcb8 | 4819 | * |
1aadf5c3 TH |
4820 | * Indicate to the mid and upper layers that an ATA command has |
4821 | * completed, with either an ok or not-ok status. | |
4822 | * | |
4823 | * Refrain from calling this function multiple times when | |
4824 | * successfully completing multiple NCQ commands. | |
4825 | * ata_qc_complete_multiple() should be used instead, which will | |
4826 | * properly update IRQ expect state. | |
f686bcb8 TH |
4827 | * |
4828 | * LOCKING: | |
cca3974e | 4829 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
4830 | */ |
4831 | void ata_qc_complete(struct ata_queued_cmd *qc) | |
4832 | { | |
4833 | struct ata_port *ap = qc->ap; | |
4834 | ||
4835 | /* XXX: New EH and old EH use different mechanisms to | |
4836 | * synchronize EH with regular execution path. | |
4837 | * | |
4838 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. | |
4839 | * Normal execution path is responsible for not accessing a | |
4840 | * failed qc. libata core enforces the rule by returning NULL | |
4841 | * from ata_qc_from_tag() for failed qcs. | |
4842 | * | |
4843 | * Old EH depends on ata_qc_complete() nullifying completion | |
4844 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does | |
4845 | * not synchronize with interrupt handler. Only PIO task is | |
4846 | * taken care of. | |
4847 | */ | |
4848 | if (ap->ops->error_handler) { | |
4dbfa39b TH |
4849 | struct ata_device *dev = qc->dev; |
4850 | struct ata_eh_info *ehi = &dev->link->eh_info; | |
4851 | ||
f686bcb8 TH |
4852 | if (unlikely(qc->err_mask)) |
4853 | qc->flags |= ATA_QCFLAG_FAILED; | |
4854 | ||
4855 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { | |
f4b31db9 TH |
4856 | /* always fill result TF for failed qc */ |
4857 | fill_result_tf(qc); | |
4858 | ||
4859 | if (!ata_tag_internal(qc->tag)) | |
f686bcb8 | 4860 | ata_qc_schedule_eh(qc); |
f4b31db9 TH |
4861 | else |
4862 | __ata_qc_complete(qc); | |
4863 | return; | |
f686bcb8 TH |
4864 | } |
4865 | ||
4dc738ed TH |
4866 | WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN); |
4867 | ||
f686bcb8 TH |
4868 | /* read result TF if requested */ |
4869 | if (qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 4870 | fill_result_tf(qc); |
f686bcb8 | 4871 | |
4dbfa39b TH |
4872 | /* Some commands need post-processing after successful |
4873 | * completion. | |
4874 | */ | |
4875 | switch (qc->tf.command) { | |
4876 | case ATA_CMD_SET_FEATURES: | |
4877 | if (qc->tf.feature != SETFEATURES_WC_ON && | |
4878 | qc->tf.feature != SETFEATURES_WC_OFF) | |
4879 | break; | |
4880 | /* fall through */ | |
4881 | case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ | |
4882 | case ATA_CMD_SET_MULTI: /* multi_count changed */ | |
4883 | /* revalidate device */ | |
4884 | ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; | |
4885 | ata_port_schedule_eh(ap); | |
4886 | break; | |
054a5fba TH |
4887 | |
4888 | case ATA_CMD_SLEEP: | |
4889 | dev->flags |= ATA_DFLAG_SLEEPING; | |
4890 | break; | |
4dbfa39b TH |
4891 | } |
4892 | ||
00115e0f TH |
4893 | if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) |
4894 | ata_verify_xfer(qc); | |
4895 | ||
f686bcb8 TH |
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 | |
dedaf2b0 TH |
4913 | * |
4914 | * Complete in-flight commands. This functions is meant to be | |
4915 | * called from low-level driver's interrupt routine to complete | |
4916 | * requests normally. ap->qc_active and @qc_active is compared | |
4917 | * and commands are completed accordingly. | |
4918 | * | |
1aadf5c3 TH |
4919 | * Always use this function when completing multiple NCQ commands |
4920 | * from IRQ handlers instead of calling ata_qc_complete() | |
4921 | * multiple times to keep IRQ expect status properly in sync. | |
4922 | * | |
dedaf2b0 | 4923 | * LOCKING: |
cca3974e | 4924 | * spin_lock_irqsave(host lock) |
dedaf2b0 TH |
4925 | * |
4926 | * RETURNS: | |
4927 | * Number of completed commands on success, -errno otherwise. | |
4928 | */ | |
79f97dad | 4929 | int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active) |
dedaf2b0 TH |
4930 | { |
4931 | int nr_done = 0; | |
4932 | u32 done_mask; | |
dedaf2b0 TH |
4933 | |
4934 | done_mask = ap->qc_active ^ qc_active; | |
4935 | ||
4936 | if (unlikely(done_mask & qc_active)) { | |
4937 | ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " | |
4938 | "(%08x->%08x)\n", ap->qc_active, qc_active); | |
4939 | return -EINVAL; | |
4940 | } | |
4941 | ||
43768180 | 4942 | while (done_mask) { |
dedaf2b0 | 4943 | struct ata_queued_cmd *qc; |
43768180 | 4944 | unsigned int tag = __ffs(done_mask); |
dedaf2b0 | 4945 | |
43768180 JA |
4946 | qc = ata_qc_from_tag(ap, tag); |
4947 | if (qc) { | |
dedaf2b0 TH |
4948 | ata_qc_complete(qc); |
4949 | nr_done++; | |
4950 | } | |
43768180 | 4951 | done_mask &= ~(1 << tag); |
dedaf2b0 TH |
4952 | } |
4953 | ||
4954 | return nr_done; | |
4955 | } | |
4956 | ||
1da177e4 LT |
4957 | /** |
4958 | * ata_qc_issue - issue taskfile to device | |
4959 | * @qc: command to issue to device | |
4960 | * | |
4961 | * Prepare an ATA command to submission to device. | |
4962 | * This includes mapping the data into a DMA-able | |
4963 | * area, filling in the S/G table, and finally | |
4964 | * writing the taskfile to hardware, starting the command. | |
4965 | * | |
4966 | * LOCKING: | |
cca3974e | 4967 | * spin_lock_irqsave(host lock) |
1da177e4 | 4968 | */ |
8e0e694a | 4969 | void ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
4970 | { |
4971 | struct ata_port *ap = qc->ap; | |
9af5c9c9 | 4972 | struct ata_link *link = qc->dev->link; |
405e66b3 | 4973 | u8 prot = qc->tf.protocol; |
1da177e4 | 4974 | |
dedaf2b0 TH |
4975 | /* Make sure only one non-NCQ command is outstanding. The |
4976 | * check is skipped for old EH because it reuses active qc to | |
4977 | * request ATAPI sense. | |
4978 | */ | |
efcb3cf7 | 4979 | WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag)); |
dedaf2b0 | 4980 | |
1973a023 | 4981 | if (ata_is_ncq(prot)) { |
efcb3cf7 | 4982 | WARN_ON_ONCE(link->sactive & (1 << qc->tag)); |
da917d69 TH |
4983 | |
4984 | if (!link->sactive) | |
4985 | ap->nr_active_links++; | |
9af5c9c9 | 4986 | link->sactive |= 1 << qc->tag; |
dedaf2b0 | 4987 | } else { |
efcb3cf7 | 4988 | WARN_ON_ONCE(link->sactive); |
da917d69 TH |
4989 | |
4990 | ap->nr_active_links++; | |
9af5c9c9 | 4991 | link->active_tag = qc->tag; |
dedaf2b0 TH |
4992 | } |
4993 | ||
e4a70e76 | 4994 | qc->flags |= ATA_QCFLAG_ACTIVE; |
dedaf2b0 | 4995 | ap->qc_active |= 1 << qc->tag; |
e4a70e76 | 4996 | |
60f5d6ef TH |
4997 | /* |
4998 | * We guarantee to LLDs that they will have at least one | |
f92a2636 TH |
4999 | * non-zero sg if the command is a data command. |
5000 | */ | |
60f5d6ef TH |
5001 | if (WARN_ON_ONCE(ata_is_data(prot) && |
5002 | (!qc->sg || !qc->n_elem || !qc->nbytes))) | |
5003 | goto sys_err; | |
f92a2636 | 5004 | |
405e66b3 | 5005 | if (ata_is_dma(prot) || (ata_is_pio(prot) && |
f92a2636 | 5006 | (ap->flags & ATA_FLAG_PIO_DMA))) |
001102d7 | 5007 | if (ata_sg_setup(qc)) |
60f5d6ef | 5008 | goto sys_err; |
1da177e4 | 5009 | |
cf480626 | 5010 | /* if device is sleeping, schedule reset and abort the link */ |
054a5fba | 5011 | if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { |
cf480626 | 5012 | link->eh_info.action |= ATA_EH_RESET; |
054a5fba TH |
5013 | ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); |
5014 | ata_link_abort(link); | |
5015 | return; | |
5016 | } | |
5017 | ||
1da177e4 LT |
5018 | ap->ops->qc_prep(qc); |
5019 | ||
8e0e694a TH |
5020 | qc->err_mask |= ap->ops->qc_issue(qc); |
5021 | if (unlikely(qc->err_mask)) | |
5022 | goto err; | |
5023 | return; | |
1da177e4 | 5024 | |
60f5d6ef | 5025 | sys_err: |
8e0e694a TH |
5026 | qc->err_mask |= AC_ERR_SYSTEM; |
5027 | err: | |
5028 | ata_qc_complete(qc); | |
1da177e4 LT |
5029 | } |
5030 | ||
34bf2170 TH |
5031 | /** |
5032 | * sata_scr_valid - test whether SCRs are accessible | |
936fd732 | 5033 | * @link: ATA link to test SCR accessibility for |
34bf2170 | 5034 | * |
936fd732 | 5035 | * Test whether SCRs are accessible for @link. |
34bf2170 TH |
5036 | * |
5037 | * LOCKING: | |
5038 | * None. | |
5039 | * | |
5040 | * RETURNS: | |
5041 | * 1 if SCRs are accessible, 0 otherwise. | |
5042 | */ | |
936fd732 | 5043 | int sata_scr_valid(struct ata_link *link) |
34bf2170 | 5044 | { |
936fd732 TH |
5045 | struct ata_port *ap = link->ap; |
5046 | ||
a16abc0b | 5047 | return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; |
34bf2170 TH |
5048 | } |
5049 | ||
5050 | /** | |
5051 | * sata_scr_read - read SCR register of the specified port | |
936fd732 | 5052 | * @link: ATA link to read SCR for |
34bf2170 TH |
5053 | * @reg: SCR to read |
5054 | * @val: Place to store read value | |
5055 | * | |
936fd732 | 5056 | * Read SCR register @reg of @link into *@val. This function is |
633273a3 TH |
5057 | * guaranteed to succeed if @link is ap->link, the cable type of |
5058 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
5059 | * |
5060 | * LOCKING: | |
633273a3 | 5061 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
5062 | * |
5063 | * RETURNS: | |
5064 | * 0 on success, negative errno on failure. | |
5065 | */ | |
936fd732 | 5066 | int sata_scr_read(struct ata_link *link, int reg, u32 *val) |
34bf2170 | 5067 | { |
633273a3 | 5068 | if (ata_is_host_link(link)) { |
633273a3 | 5069 | if (sata_scr_valid(link)) |
82ef04fb | 5070 | return link->ap->ops->scr_read(link, reg, val); |
633273a3 TH |
5071 | return -EOPNOTSUPP; |
5072 | } | |
5073 | ||
5074 | return sata_pmp_scr_read(link, reg, val); | |
34bf2170 TH |
5075 | } |
5076 | ||
5077 | /** | |
5078 | * sata_scr_write - write SCR register of the specified port | |
936fd732 | 5079 | * @link: ATA link to write SCR for |
34bf2170 TH |
5080 | * @reg: SCR to write |
5081 | * @val: value to write | |
5082 | * | |
936fd732 | 5083 | * Write @val to SCR register @reg of @link. This function is |
633273a3 TH |
5084 | * guaranteed to succeed if @link is ap->link, the cable type of |
5085 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
5086 | * |
5087 | * LOCKING: | |
633273a3 | 5088 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
5089 | * |
5090 | * RETURNS: | |
5091 | * 0 on success, negative errno on failure. | |
5092 | */ | |
936fd732 | 5093 | int sata_scr_write(struct ata_link *link, int reg, u32 val) |
34bf2170 | 5094 | { |
633273a3 | 5095 | if (ata_is_host_link(link)) { |
633273a3 | 5096 | if (sata_scr_valid(link)) |
82ef04fb | 5097 | return link->ap->ops->scr_write(link, reg, val); |
633273a3 TH |
5098 | return -EOPNOTSUPP; |
5099 | } | |
936fd732 | 5100 | |
633273a3 | 5101 | return sata_pmp_scr_write(link, reg, val); |
34bf2170 TH |
5102 | } |
5103 | ||
5104 | /** | |
5105 | * sata_scr_write_flush - write SCR register of the specified port and flush | |
936fd732 | 5106 | * @link: ATA link to write SCR for |
34bf2170 TH |
5107 | * @reg: SCR to write |
5108 | * @val: value to write | |
5109 | * | |
5110 | * This function is identical to sata_scr_write() except that this | |
5111 | * function performs flush after writing to the register. | |
5112 | * | |
5113 | * LOCKING: | |
633273a3 | 5114 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
5115 | * |
5116 | * RETURNS: | |
5117 | * 0 on success, negative errno on failure. | |
5118 | */ | |
936fd732 | 5119 | int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) |
34bf2170 | 5120 | { |
633273a3 | 5121 | if (ata_is_host_link(link)) { |
633273a3 | 5122 | int rc; |
da3dbb17 | 5123 | |
633273a3 | 5124 | if (sata_scr_valid(link)) { |
82ef04fb | 5125 | rc = link->ap->ops->scr_write(link, reg, val); |
633273a3 | 5126 | if (rc == 0) |
82ef04fb | 5127 | rc = link->ap->ops->scr_read(link, reg, &val); |
633273a3 TH |
5128 | return rc; |
5129 | } | |
5130 | return -EOPNOTSUPP; | |
34bf2170 | 5131 | } |
633273a3 TH |
5132 | |
5133 | return sata_pmp_scr_write(link, reg, val); | |
34bf2170 TH |
5134 | } |
5135 | ||
5136 | /** | |
b1c72916 | 5137 | * ata_phys_link_online - test whether the given link is online |
936fd732 | 5138 | * @link: ATA link to test |
34bf2170 | 5139 | * |
936fd732 TH |
5140 | * Test whether @link is online. Note that this function returns |
5141 | * 0 if online status of @link cannot be obtained, so | |
5142 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
5143 | * |
5144 | * LOCKING: | |
5145 | * None. | |
5146 | * | |
5147 | * RETURNS: | |
b5b3fa38 | 5148 | * True if the port online status is available and online. |
34bf2170 | 5149 | */ |
b1c72916 | 5150 | bool ata_phys_link_online(struct ata_link *link) |
34bf2170 TH |
5151 | { |
5152 | u32 sstatus; | |
5153 | ||
936fd732 | 5154 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
9913ff8a | 5155 | ata_sstatus_online(sstatus)) |
b5b3fa38 TH |
5156 | return true; |
5157 | return false; | |
34bf2170 TH |
5158 | } |
5159 | ||
5160 | /** | |
b1c72916 | 5161 | * ata_phys_link_offline - test whether the given link is offline |
936fd732 | 5162 | * @link: ATA link to test |
34bf2170 | 5163 | * |
936fd732 TH |
5164 | * Test whether @link is offline. Note that this function |
5165 | * returns 0 if offline status of @link cannot be obtained, so | |
5166 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
5167 | * |
5168 | * LOCKING: | |
5169 | * None. | |
5170 | * | |
5171 | * RETURNS: | |
b5b3fa38 | 5172 | * True if the port offline status is available and offline. |
34bf2170 | 5173 | */ |
b1c72916 | 5174 | bool ata_phys_link_offline(struct ata_link *link) |
34bf2170 TH |
5175 | { |
5176 | u32 sstatus; | |
5177 | ||
936fd732 | 5178 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
9913ff8a | 5179 | !ata_sstatus_online(sstatus)) |
b5b3fa38 TH |
5180 | return true; |
5181 | return false; | |
34bf2170 | 5182 | } |
0baab86b | 5183 | |
b1c72916 TH |
5184 | /** |
5185 | * ata_link_online - test whether the given link is online | |
5186 | * @link: ATA link to test | |
5187 | * | |
5188 | * Test whether @link is online. This is identical to | |
5189 | * ata_phys_link_online() when there's no slave link. When | |
5190 | * there's a slave link, this function should only be called on | |
5191 | * the master link and will return true if any of M/S links is | |
5192 | * online. | |
5193 | * | |
5194 | * LOCKING: | |
5195 | * None. | |
5196 | * | |
5197 | * RETURNS: | |
5198 | * True if the port online status is available and online. | |
5199 | */ | |
5200 | bool ata_link_online(struct ata_link *link) | |
5201 | { | |
5202 | struct ata_link *slave = link->ap->slave_link; | |
5203 | ||
5204 | WARN_ON(link == slave); /* shouldn't be called on slave link */ | |
5205 | ||
5206 | return ata_phys_link_online(link) || | |
5207 | (slave && ata_phys_link_online(slave)); | |
5208 | } | |
5209 | ||
5210 | /** | |
5211 | * ata_link_offline - test whether the given link is offline | |
5212 | * @link: ATA link to test | |
5213 | * | |
5214 | * Test whether @link is offline. This is identical to | |
5215 | * ata_phys_link_offline() when there's no slave link. When | |
5216 | * there's a slave link, this function should only be called on | |
5217 | * the master link and will return true if both M/S links are | |
5218 | * offline. | |
5219 | * | |
5220 | * LOCKING: | |
5221 | * None. | |
5222 | * | |
5223 | * RETURNS: | |
5224 | * True if the port offline status is available and offline. | |
5225 | */ | |
5226 | bool ata_link_offline(struct ata_link *link) | |
5227 | { | |
5228 | struct ata_link *slave = link->ap->slave_link; | |
5229 | ||
5230 | WARN_ON(link == slave); /* shouldn't be called on slave link */ | |
5231 | ||
5232 | return ata_phys_link_offline(link) && | |
5233 | (!slave || ata_phys_link_offline(slave)); | |
5234 | } | |
5235 | ||
6ffa01d8 | 5236 | #ifdef CONFIG_PM |
cca3974e JG |
5237 | static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, |
5238 | unsigned int action, unsigned int ehi_flags, | |
5239 | int wait) | |
500530f6 TH |
5240 | { |
5241 | unsigned long flags; | |
5242 | int i, rc; | |
5243 | ||
cca3974e JG |
5244 | for (i = 0; i < host->n_ports; i++) { |
5245 | struct ata_port *ap = host->ports[i]; | |
e3667ebf | 5246 | struct ata_link *link; |
500530f6 TH |
5247 | |
5248 | /* Previous resume operation might still be in | |
5249 | * progress. Wait for PM_PENDING to clear. | |
5250 | */ | |
5251 | if (ap->pflags & ATA_PFLAG_PM_PENDING) { | |
5252 | ata_port_wait_eh(ap); | |
5253 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
5254 | } | |
5255 | ||
5256 | /* request PM ops to EH */ | |
5257 | spin_lock_irqsave(ap->lock, flags); | |
5258 | ||
5259 | ap->pm_mesg = mesg; | |
5260 | if (wait) { | |
5261 | rc = 0; | |
5262 | ap->pm_result = &rc; | |
5263 | } | |
5264 | ||
5265 | ap->pflags |= ATA_PFLAG_PM_PENDING; | |
1eca4365 | 5266 | ata_for_each_link(link, ap, HOST_FIRST) { |
e3667ebf TH |
5267 | link->eh_info.action |= action; |
5268 | link->eh_info.flags |= ehi_flags; | |
5269 | } | |
500530f6 TH |
5270 | |
5271 | ata_port_schedule_eh(ap); | |
5272 | ||
5273 | spin_unlock_irqrestore(ap->lock, flags); | |
5274 | ||
5275 | /* wait and check result */ | |
5276 | if (wait) { | |
5277 | ata_port_wait_eh(ap); | |
5278 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
5279 | if (rc) | |
5280 | return rc; | |
5281 | } | |
5282 | } | |
5283 | ||
5284 | return 0; | |
5285 | } | |
5286 | ||
5287 | /** | |
cca3974e JG |
5288 | * ata_host_suspend - suspend host |
5289 | * @host: host to suspend | |
500530f6 TH |
5290 | * @mesg: PM message |
5291 | * | |
cca3974e | 5292 | * Suspend @host. Actual operation is performed by EH. This |
500530f6 TH |
5293 | * function requests EH to perform PM operations and waits for EH |
5294 | * to finish. | |
5295 | * | |
5296 | * LOCKING: | |
5297 | * Kernel thread context (may sleep). | |
5298 | * | |
5299 | * RETURNS: | |
5300 | * 0 on success, -errno on failure. | |
5301 | */ | |
cca3974e | 5302 | int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
500530f6 | 5303 | { |
e2f3d75f | 5304 | unsigned int ehi_flags = ATA_EHI_QUIET; |
9666f400 | 5305 | int rc; |
500530f6 | 5306 | |
e2f3d75f TH |
5307 | /* |
5308 | * On some hardware, device fails to respond after spun down | |
5309 | * for suspend. As the device won't be used before being | |
5310 | * resumed, we don't need to touch the device. Ask EH to skip | |
5311 | * the usual stuff and proceed directly to suspend. | |
5312 | * | |
5313 | * http://thread.gmane.org/gmane.linux.ide/46764 | |
5314 | */ | |
5315 | if (mesg.event == PM_EVENT_SUSPEND) | |
5316 | ehi_flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_NO_RECOVERY; | |
5317 | ||
5318 | rc = ata_host_request_pm(host, mesg, 0, ehi_flags, 1); | |
72ad6ec4 JG |
5319 | if (rc == 0) |
5320 | host->dev->power.power_state = mesg; | |
500530f6 TH |
5321 | return rc; |
5322 | } | |
5323 | ||
5324 | /** | |
cca3974e JG |
5325 | * ata_host_resume - resume host |
5326 | * @host: host to resume | |
500530f6 | 5327 | * |
cca3974e | 5328 | * Resume @host. Actual operation is performed by EH. This |
500530f6 TH |
5329 | * function requests EH to perform PM operations and returns. |
5330 | * Note that all resume operations are performed parallely. | |
5331 | * | |
5332 | * LOCKING: | |
5333 | * Kernel thread context (may sleep). | |
5334 | */ | |
cca3974e | 5335 | void ata_host_resume(struct ata_host *host) |
500530f6 | 5336 | { |
cf480626 | 5337 | ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET, |
cca3974e | 5338 | ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); |
72ad6ec4 | 5339 | host->dev->power.power_state = PMSG_ON; |
500530f6 | 5340 | } |
6ffa01d8 | 5341 | #endif |
500530f6 | 5342 | |
3ef3b43d TH |
5343 | /** |
5344 | * ata_dev_init - Initialize an ata_device structure | |
5345 | * @dev: Device structure to initialize | |
5346 | * | |
5347 | * Initialize @dev in preparation for probing. | |
5348 | * | |
5349 | * LOCKING: | |
5350 | * Inherited from caller. | |
5351 | */ | |
5352 | void ata_dev_init(struct ata_device *dev) | |
5353 | { | |
b1c72916 | 5354 | struct ata_link *link = ata_dev_phys_link(dev); |
9af5c9c9 | 5355 | struct ata_port *ap = link->ap; |
72fa4b74 TH |
5356 | unsigned long flags; |
5357 | ||
b1c72916 | 5358 | /* SATA spd limit is bound to the attached device, reset together */ |
9af5c9c9 TH |
5359 | link->sata_spd_limit = link->hw_sata_spd_limit; |
5360 | link->sata_spd = 0; | |
5a04bf4b | 5361 | |
72fa4b74 TH |
5362 | /* High bits of dev->flags are used to record warm plug |
5363 | * requests which occur asynchronously. Synchronize using | |
cca3974e | 5364 | * host lock. |
72fa4b74 | 5365 | */ |
ba6a1308 | 5366 | spin_lock_irqsave(ap->lock, flags); |
72fa4b74 | 5367 | dev->flags &= ~ATA_DFLAG_INIT_MASK; |
3dcc323f | 5368 | dev->horkage = 0; |
ba6a1308 | 5369 | spin_unlock_irqrestore(ap->lock, flags); |
3ef3b43d | 5370 | |
99cf610a TH |
5371 | memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0, |
5372 | ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN); | |
3ef3b43d TH |
5373 | dev->pio_mask = UINT_MAX; |
5374 | dev->mwdma_mask = UINT_MAX; | |
5375 | dev->udma_mask = UINT_MAX; | |
5376 | } | |
5377 | ||
4fb37a25 TH |
5378 | /** |
5379 | * ata_link_init - Initialize an ata_link structure | |
5380 | * @ap: ATA port link is attached to | |
5381 | * @link: Link structure to initialize | |
8989805d | 5382 | * @pmp: Port multiplier port number |
4fb37a25 TH |
5383 | * |
5384 | * Initialize @link. | |
5385 | * | |
5386 | * LOCKING: | |
5387 | * Kernel thread context (may sleep) | |
5388 | */ | |
fb7fd614 | 5389 | void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) |
4fb37a25 TH |
5390 | { |
5391 | int i; | |
5392 | ||
5393 | /* clear everything except for devices */ | |
d9027470 GG |
5394 | memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0, |
5395 | ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN); | |
4fb37a25 TH |
5396 | |
5397 | link->ap = ap; | |
8989805d | 5398 | link->pmp = pmp; |
4fb37a25 TH |
5399 | link->active_tag = ATA_TAG_POISON; |
5400 | link->hw_sata_spd_limit = UINT_MAX; | |
5401 | ||
5402 | /* can't use iterator, ap isn't initialized yet */ | |
5403 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
5404 | struct ata_device *dev = &link->device[i]; | |
5405 | ||
5406 | dev->link = link; | |
5407 | dev->devno = dev - link->device; | |
110f66d2 TH |
5408 | #ifdef CONFIG_ATA_ACPI |
5409 | dev->gtf_filter = ata_acpi_gtf_filter; | |
5410 | #endif | |
4fb37a25 TH |
5411 | ata_dev_init(dev); |
5412 | } | |
5413 | } | |
5414 | ||
5415 | /** | |
5416 | * sata_link_init_spd - Initialize link->sata_spd_limit | |
5417 | * @link: Link to configure sata_spd_limit for | |
5418 | * | |
5419 | * Initialize @link->[hw_]sata_spd_limit to the currently | |
5420 | * configured value. | |
5421 | * | |
5422 | * LOCKING: | |
5423 | * Kernel thread context (may sleep). | |
5424 | * | |
5425 | * RETURNS: | |
5426 | * 0 on success, -errno on failure. | |
5427 | */ | |
fb7fd614 | 5428 | int sata_link_init_spd(struct ata_link *link) |
4fb37a25 | 5429 | { |
33267325 | 5430 | u8 spd; |
4fb37a25 TH |
5431 | int rc; |
5432 | ||
d127ea7b | 5433 | rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol); |
4fb37a25 TH |
5434 | if (rc) |
5435 | return rc; | |
5436 | ||
d127ea7b | 5437 | spd = (link->saved_scontrol >> 4) & 0xf; |
4fb37a25 TH |
5438 | if (spd) |
5439 | link->hw_sata_spd_limit &= (1 << spd) - 1; | |
5440 | ||
05944bdf | 5441 | ata_force_link_limits(link); |
33267325 | 5442 | |
4fb37a25 TH |
5443 | link->sata_spd_limit = link->hw_sata_spd_limit; |
5444 | ||
5445 | return 0; | |
5446 | } | |
5447 | ||
1da177e4 | 5448 | /** |
f3187195 TH |
5449 | * ata_port_alloc - allocate and initialize basic ATA port resources |
5450 | * @host: ATA host this allocated port belongs to | |
1da177e4 | 5451 | * |
f3187195 TH |
5452 | * Allocate and initialize basic ATA port resources. |
5453 | * | |
5454 | * RETURNS: | |
5455 | * Allocate ATA port on success, NULL on failure. | |
0cba632b | 5456 | * |
1da177e4 | 5457 | * LOCKING: |
f3187195 | 5458 | * Inherited from calling layer (may sleep). |
1da177e4 | 5459 | */ |
f3187195 | 5460 | struct ata_port *ata_port_alloc(struct ata_host *host) |
1da177e4 | 5461 | { |
f3187195 | 5462 | struct ata_port *ap; |
1da177e4 | 5463 | |
f3187195 TH |
5464 | DPRINTK("ENTER\n"); |
5465 | ||
5466 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); | |
5467 | if (!ap) | |
5468 | return NULL; | |
d9027470 | 5469 | |
f4d6d004 | 5470 | ap->pflags |= ATA_PFLAG_INITIALIZING; |
cca3974e | 5471 | ap->lock = &host->lock; |
f3187195 | 5472 | ap->print_id = -1; |
cca3974e | 5473 | ap->host = host; |
f3187195 | 5474 | ap->dev = host->dev; |
bd5d825c BP |
5475 | |
5476 | #if defined(ATA_VERBOSE_DEBUG) | |
5477 | /* turn on all debugging levels */ | |
5478 | ap->msg_enable = 0x00FF; | |
5479 | #elif defined(ATA_DEBUG) | |
5480 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; | |
88574551 | 5481 | #else |
0dd4b21f | 5482 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
bd5d825c | 5483 | #endif |
1da177e4 | 5484 | |
ad72cf98 | 5485 | mutex_init(&ap->scsi_scan_mutex); |
65f27f38 DH |
5486 | INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); |
5487 | INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); | |
a72ec4ce | 5488 | INIT_LIST_HEAD(&ap->eh_done_q); |
c6cf9e99 | 5489 | init_waitqueue_head(&ap->eh_wait_q); |
45fabbb7 | 5490 | init_completion(&ap->park_req_pending); |
5ddf24c5 TH |
5491 | init_timer_deferrable(&ap->fastdrain_timer); |
5492 | ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; | |
5493 | ap->fastdrain_timer.data = (unsigned long)ap; | |
1da177e4 | 5494 | |
838df628 | 5495 | ap->cbl = ATA_CBL_NONE; |
838df628 | 5496 | |
8989805d | 5497 | ata_link_init(ap, &ap->link, 0); |
1da177e4 LT |
5498 | |
5499 | #ifdef ATA_IRQ_TRAP | |
5500 | ap->stats.unhandled_irq = 1; | |
5501 | ap->stats.idle_irq = 1; | |
5502 | #endif | |
270390e1 TH |
5503 | ata_sff_port_init(ap); |
5504 | ||
1da177e4 | 5505 | return ap; |
1da177e4 LT |
5506 | } |
5507 | ||
f0d36efd TH |
5508 | static void ata_host_release(struct device *gendev, void *res) |
5509 | { | |
5510 | struct ata_host *host = dev_get_drvdata(gendev); | |
5511 | int i; | |
5512 | ||
1aa506e4 TH |
5513 | for (i = 0; i < host->n_ports; i++) { |
5514 | struct ata_port *ap = host->ports[i]; | |
5515 | ||
4911487a TH |
5516 | if (!ap) |
5517 | continue; | |
5518 | ||
5519 | if (ap->scsi_host) | |
1aa506e4 TH |
5520 | scsi_host_put(ap->scsi_host); |
5521 | ||
633273a3 | 5522 | kfree(ap->pmp_link); |
b1c72916 | 5523 | kfree(ap->slave_link); |
4911487a | 5524 | kfree(ap); |
1aa506e4 TH |
5525 | host->ports[i] = NULL; |
5526 | } | |
5527 | ||
1aa56cca | 5528 | dev_set_drvdata(gendev, NULL); |
f0d36efd TH |
5529 | } |
5530 | ||
f3187195 TH |
5531 | /** |
5532 | * ata_host_alloc - allocate and init basic ATA host resources | |
5533 | * @dev: generic device this host is associated with | |
5534 | * @max_ports: maximum number of ATA ports associated with this host | |
5535 | * | |
5536 | * Allocate and initialize basic ATA host resources. LLD calls | |
5537 | * this function to allocate a host, initializes it fully and | |
5538 | * attaches it using ata_host_register(). | |
5539 | * | |
5540 | * @max_ports ports are allocated and host->n_ports is | |
5541 | * initialized to @max_ports. The caller is allowed to decrease | |
5542 | * host->n_ports before calling ata_host_register(). The unused | |
5543 | * ports will be automatically freed on registration. | |
5544 | * | |
5545 | * RETURNS: | |
5546 | * Allocate ATA host on success, NULL on failure. | |
5547 | * | |
5548 | * LOCKING: | |
5549 | * Inherited from calling layer (may sleep). | |
5550 | */ | |
5551 | struct ata_host *ata_host_alloc(struct device *dev, int max_ports) | |
5552 | { | |
5553 | struct ata_host *host; | |
5554 | size_t sz; | |
5555 | int i; | |
5556 | ||
5557 | DPRINTK("ENTER\n"); | |
5558 | ||
5559 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) | |
5560 | return NULL; | |
5561 | ||
5562 | /* alloc a container for our list of ATA ports (buses) */ | |
5563 | sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); | |
5564 | /* alloc a container for our list of ATA ports (buses) */ | |
5565 | host = devres_alloc(ata_host_release, sz, GFP_KERNEL); | |
5566 | if (!host) | |
5567 | goto err_out; | |
5568 | ||
5569 | devres_add(dev, host); | |
5570 | dev_set_drvdata(dev, host); | |
5571 | ||
5572 | spin_lock_init(&host->lock); | |
5573 | host->dev = dev; | |
5574 | host->n_ports = max_ports; | |
5575 | ||
5576 | /* allocate ports bound to this host */ | |
5577 | for (i = 0; i < max_ports; i++) { | |
5578 | struct ata_port *ap; | |
5579 | ||
5580 | ap = ata_port_alloc(host); | |
5581 | if (!ap) | |
5582 | goto err_out; | |
5583 | ||
5584 | ap->port_no = i; | |
5585 | host->ports[i] = ap; | |
5586 | } | |
5587 | ||
5588 | devres_remove_group(dev, NULL); | |
5589 | return host; | |
5590 | ||
5591 | err_out: | |
5592 | devres_release_group(dev, NULL); | |
5593 | return NULL; | |
5594 | } | |
5595 | ||
f5cda257 TH |
5596 | /** |
5597 | * ata_host_alloc_pinfo - alloc host and init with port_info array | |
5598 | * @dev: generic device this host is associated with | |
5599 | * @ppi: array of ATA port_info to initialize host with | |
5600 | * @n_ports: number of ATA ports attached to this host | |
5601 | * | |
5602 | * Allocate ATA host and initialize with info from @ppi. If NULL | |
5603 | * terminated, @ppi may contain fewer entries than @n_ports. The | |
5604 | * last entry will be used for the remaining ports. | |
5605 | * | |
5606 | * RETURNS: | |
5607 | * Allocate ATA host on success, NULL on failure. | |
5608 | * | |
5609 | * LOCKING: | |
5610 | * Inherited from calling layer (may sleep). | |
5611 | */ | |
5612 | struct ata_host *ata_host_alloc_pinfo(struct device *dev, | |
5613 | const struct ata_port_info * const * ppi, | |
5614 | int n_ports) | |
5615 | { | |
5616 | const struct ata_port_info *pi; | |
5617 | struct ata_host *host; | |
5618 | int i, j; | |
5619 | ||
5620 | host = ata_host_alloc(dev, n_ports); | |
5621 | if (!host) | |
5622 | return NULL; | |
5623 | ||
5624 | for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { | |
5625 | struct ata_port *ap = host->ports[i]; | |
5626 | ||
5627 | if (ppi[j]) | |
5628 | pi = ppi[j++]; | |
5629 | ||
5630 | ap->pio_mask = pi->pio_mask; | |
5631 | ap->mwdma_mask = pi->mwdma_mask; | |
5632 | ap->udma_mask = pi->udma_mask; | |
5633 | ap->flags |= pi->flags; | |
0c88758b | 5634 | ap->link.flags |= pi->link_flags; |
f5cda257 TH |
5635 | ap->ops = pi->port_ops; |
5636 | ||
5637 | if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) | |
5638 | host->ops = pi->port_ops; | |
f5cda257 TH |
5639 | } |
5640 | ||
5641 | return host; | |
5642 | } | |
5643 | ||
b1c72916 TH |
5644 | /** |
5645 | * ata_slave_link_init - initialize slave link | |
5646 | * @ap: port to initialize slave link for | |
5647 | * | |
5648 | * Create and initialize slave link for @ap. This enables slave | |
5649 | * link handling on the port. | |
5650 | * | |
5651 | * In libata, a port contains links and a link contains devices. | |
5652 | * There is single host link but if a PMP is attached to it, | |
5653 | * there can be multiple fan-out links. On SATA, there's usually | |
5654 | * a single device connected to a link but PATA and SATA | |
5655 | * controllers emulating TF based interface can have two - master | |
5656 | * and slave. | |
5657 | * | |
5658 | * However, there are a few controllers which don't fit into this | |
5659 | * abstraction too well - SATA controllers which emulate TF | |
5660 | * interface with both master and slave devices but also have | |
5661 | * separate SCR register sets for each device. These controllers | |
5662 | * need separate links for physical link handling | |
5663 | * (e.g. onlineness, link speed) but should be treated like a | |
5664 | * traditional M/S controller for everything else (e.g. command | |
5665 | * issue, softreset). | |
5666 | * | |
5667 | * slave_link is libata's way of handling this class of | |
5668 | * controllers without impacting core layer too much. For | |
5669 | * anything other than physical link handling, the default host | |
5670 | * link is used for both master and slave. For physical link | |
5671 | * handling, separate @ap->slave_link is used. All dirty details | |
5672 | * are implemented inside libata core layer. From LLD's POV, the | |
5673 | * only difference is that prereset, hardreset and postreset are | |
5674 | * called once more for the slave link, so the reset sequence | |
5675 | * looks like the following. | |
5676 | * | |
5677 | * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) -> | |
5678 | * softreset(M) -> postreset(M) -> postreset(S) | |
5679 | * | |
5680 | * Note that softreset is called only for the master. Softreset | |
5681 | * resets both M/S by definition, so SRST on master should handle | |
5682 | * both (the standard method will work just fine). | |
5683 | * | |
5684 | * LOCKING: | |
5685 | * Should be called before host is registered. | |
5686 | * | |
5687 | * RETURNS: | |
5688 | * 0 on success, -errno on failure. | |
5689 | */ | |
5690 | int ata_slave_link_init(struct ata_port *ap) | |
5691 | { | |
5692 | struct ata_link *link; | |
5693 | ||
5694 | WARN_ON(ap->slave_link); | |
5695 | WARN_ON(ap->flags & ATA_FLAG_PMP); | |
5696 | ||
5697 | link = kzalloc(sizeof(*link), GFP_KERNEL); | |
5698 | if (!link) | |
5699 | return -ENOMEM; | |
5700 | ||
5701 | ata_link_init(ap, link, 1); | |
5702 | ap->slave_link = link; | |
5703 | return 0; | |
5704 | } | |
5705 | ||
32ebbc0c TH |
5706 | static void ata_host_stop(struct device *gendev, void *res) |
5707 | { | |
5708 | struct ata_host *host = dev_get_drvdata(gendev); | |
5709 | int i; | |
5710 | ||
5711 | WARN_ON(!(host->flags & ATA_HOST_STARTED)); | |
5712 | ||
5713 | for (i = 0; i < host->n_ports; i++) { | |
5714 | struct ata_port *ap = host->ports[i]; | |
5715 | ||
5716 | if (ap->ops->port_stop) | |
5717 | ap->ops->port_stop(ap); | |
5718 | } | |
5719 | ||
5720 | if (host->ops->host_stop) | |
5721 | host->ops->host_stop(host); | |
5722 | } | |
5723 | ||
029cfd6b TH |
5724 | /** |
5725 | * ata_finalize_port_ops - finalize ata_port_operations | |
5726 | * @ops: ata_port_operations to finalize | |
5727 | * | |
5728 | * An ata_port_operations can inherit from another ops and that | |
5729 | * ops can again inherit from another. This can go on as many | |
5730 | * times as necessary as long as there is no loop in the | |
5731 | * inheritance chain. | |
5732 | * | |
5733 | * Ops tables are finalized when the host is started. NULL or | |
5734 | * unspecified entries are inherited from the closet ancestor | |
5735 | * which has the method and the entry is populated with it. | |
5736 | * After finalization, the ops table directly points to all the | |
5737 | * methods and ->inherits is no longer necessary and cleared. | |
5738 | * | |
5739 | * Using ATA_OP_NULL, inheriting ops can force a method to NULL. | |
5740 | * | |
5741 | * LOCKING: | |
5742 | * None. | |
5743 | */ | |
5744 | static void ata_finalize_port_ops(struct ata_port_operations *ops) | |
5745 | { | |
2da67659 | 5746 | static DEFINE_SPINLOCK(lock); |
029cfd6b TH |
5747 | const struct ata_port_operations *cur; |
5748 | void **begin = (void **)ops; | |
5749 | void **end = (void **)&ops->inherits; | |
5750 | void **pp; | |
5751 | ||
5752 | if (!ops || !ops->inherits) | |
5753 | return; | |
5754 | ||
5755 | spin_lock(&lock); | |
5756 | ||
5757 | for (cur = ops->inherits; cur; cur = cur->inherits) { | |
5758 | void **inherit = (void **)cur; | |
5759 | ||
5760 | for (pp = begin; pp < end; pp++, inherit++) | |
5761 | if (!*pp) | |
5762 | *pp = *inherit; | |
5763 | } | |
5764 | ||
5765 | for (pp = begin; pp < end; pp++) | |
5766 | if (IS_ERR(*pp)) | |
5767 | *pp = NULL; | |
5768 | ||
5769 | ops->inherits = NULL; | |
5770 | ||
5771 | spin_unlock(&lock); | |
5772 | } | |
5773 | ||
ecef7253 TH |
5774 | /** |
5775 | * ata_host_start - start and freeze ports of an ATA host | |
5776 | * @host: ATA host to start ports for | |
5777 | * | |
5778 | * Start and then freeze ports of @host. Started status is | |
5779 | * recorded in host->flags, so this function can be called | |
5780 | * multiple times. Ports are guaranteed to get started only | |
f3187195 TH |
5781 | * once. If host->ops isn't initialized yet, its set to the |
5782 | * first non-dummy port ops. | |
ecef7253 TH |
5783 | * |
5784 | * LOCKING: | |
5785 | * Inherited from calling layer (may sleep). | |
5786 | * | |
5787 | * RETURNS: | |
5788 | * 0 if all ports are started successfully, -errno otherwise. | |
5789 | */ | |
5790 | int ata_host_start(struct ata_host *host) | |
5791 | { | |
32ebbc0c TH |
5792 | int have_stop = 0; |
5793 | void *start_dr = NULL; | |
ecef7253 TH |
5794 | int i, rc; |
5795 | ||
5796 | if (host->flags & ATA_HOST_STARTED) | |
5797 | return 0; | |
5798 | ||
029cfd6b TH |
5799 | ata_finalize_port_ops(host->ops); |
5800 | ||
ecef7253 TH |
5801 | for (i = 0; i < host->n_ports; i++) { |
5802 | struct ata_port *ap = host->ports[i]; | |
5803 | ||
029cfd6b TH |
5804 | ata_finalize_port_ops(ap->ops); |
5805 | ||
f3187195 TH |
5806 | if (!host->ops && !ata_port_is_dummy(ap)) |
5807 | host->ops = ap->ops; | |
5808 | ||
32ebbc0c TH |
5809 | if (ap->ops->port_stop) |
5810 | have_stop = 1; | |
5811 | } | |
5812 | ||
5813 | if (host->ops->host_stop) | |
5814 | have_stop = 1; | |
5815 | ||
5816 | if (have_stop) { | |
5817 | start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); | |
5818 | if (!start_dr) | |
5819 | return -ENOMEM; | |
5820 | } | |
5821 | ||
5822 | for (i = 0; i < host->n_ports; i++) { | |
5823 | struct ata_port *ap = host->ports[i]; | |
5824 | ||
ecef7253 TH |
5825 | if (ap->ops->port_start) { |
5826 | rc = ap->ops->port_start(ap); | |
5827 | if (rc) { | |
0f9fe9b7 | 5828 | if (rc != -ENODEV) |
0f757743 AM |
5829 | dev_printk(KERN_ERR, host->dev, |
5830 | "failed to start port %d " | |
5831 | "(errno=%d)\n", i, rc); | |
ecef7253 TH |
5832 | goto err_out; |
5833 | } | |
5834 | } | |
ecef7253 TH |
5835 | ata_eh_freeze_port(ap); |
5836 | } | |
5837 | ||
32ebbc0c TH |
5838 | if (start_dr) |
5839 | devres_add(host->dev, start_dr); | |
ecef7253 TH |
5840 | host->flags |= ATA_HOST_STARTED; |
5841 | return 0; | |
5842 | ||
5843 | err_out: | |
5844 | while (--i >= 0) { | |
5845 | struct ata_port *ap = host->ports[i]; | |
5846 | ||
5847 | if (ap->ops->port_stop) | |
5848 | ap->ops->port_stop(ap); | |
5849 | } | |
32ebbc0c | 5850 | devres_free(start_dr); |
ecef7253 TH |
5851 | return rc; |
5852 | } | |
5853 | ||
b03732f0 | 5854 | /** |
cca3974e JG |
5855 | * ata_sas_host_init - Initialize a host struct |
5856 | * @host: host to initialize | |
5857 | * @dev: device host is attached to | |
5858 | * @flags: host flags | |
5859 | * @ops: port_ops | |
b03732f0 BK |
5860 | * |
5861 | * LOCKING: | |
5862 | * PCI/etc. bus probe sem. | |
5863 | * | |
5864 | */ | |
f3187195 | 5865 | /* KILLME - the only user left is ipr */ |
cca3974e | 5866 | void ata_host_init(struct ata_host *host, struct device *dev, |
029cfd6b | 5867 | unsigned long flags, struct ata_port_operations *ops) |
b03732f0 | 5868 | { |
cca3974e JG |
5869 | spin_lock_init(&host->lock); |
5870 | host->dev = dev; | |
5871 | host->flags = flags; | |
5872 | host->ops = ops; | |
b03732f0 BK |
5873 | } |
5874 | ||
79318057 AV |
5875 | |
5876 | static void async_port_probe(void *data, async_cookie_t cookie) | |
5877 | { | |
5878 | int rc; | |
5879 | struct ata_port *ap = data; | |
886ad09f AV |
5880 | |
5881 | /* | |
5882 | * If we're not allowed to scan this host in parallel, | |
5883 | * we need to wait until all previous scans have completed | |
5884 | * before going further. | |
fa853a48 AV |
5885 | * Jeff Garzik says this is only within a controller, so we |
5886 | * don't need to wait for port 0, only for later ports. | |
886ad09f | 5887 | */ |
fa853a48 | 5888 | if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0) |
886ad09f AV |
5889 | async_synchronize_cookie(cookie); |
5890 | ||
79318057 AV |
5891 | /* probe */ |
5892 | if (ap->ops->error_handler) { | |
5893 | struct ata_eh_info *ehi = &ap->link.eh_info; | |
5894 | unsigned long flags; | |
5895 | ||
79318057 AV |
5896 | /* kick EH for boot probing */ |
5897 | spin_lock_irqsave(ap->lock, flags); | |
5898 | ||
5899 | ehi->probe_mask |= ATA_ALL_DEVICES; | |
6b7ae954 | 5900 | ehi->action |= ATA_EH_RESET; |
79318057 AV |
5901 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; |
5902 | ||
5903 | ap->pflags &= ~ATA_PFLAG_INITIALIZING; | |
5904 | ap->pflags |= ATA_PFLAG_LOADING; | |
5905 | ata_port_schedule_eh(ap); | |
5906 | ||
5907 | spin_unlock_irqrestore(ap->lock, flags); | |
5908 | ||
5909 | /* wait for EH to finish */ | |
5910 | ata_port_wait_eh(ap); | |
5911 | } else { | |
5912 | DPRINTK("ata%u: bus probe begin\n", ap->print_id); | |
5913 | rc = ata_bus_probe(ap); | |
5914 | DPRINTK("ata%u: bus probe end\n", ap->print_id); | |
5915 | ||
5916 | if (rc) { | |
5917 | /* FIXME: do something useful here? | |
5918 | * Current libata behavior will | |
5919 | * tear down everything when | |
5920 | * the module is removed | |
5921 | * or the h/w is unplugged. | |
5922 | */ | |
5923 | } | |
5924 | } | |
f29d3b23 AV |
5925 | |
5926 | /* in order to keep device order, we need to synchronize at this point */ | |
5927 | async_synchronize_cookie(cookie); | |
5928 | ||
5929 | ata_scsi_scan_host(ap, 1); | |
5930 | ||
79318057 | 5931 | } |
f3187195 TH |
5932 | /** |
5933 | * ata_host_register - register initialized ATA host | |
5934 | * @host: ATA host to register | |
5935 | * @sht: template for SCSI host | |
5936 | * | |
5937 | * Register initialized ATA host. @host is allocated using | |
5938 | * ata_host_alloc() and fully initialized by LLD. This function | |
5939 | * starts ports, registers @host with ATA and SCSI layers and | |
5940 | * probe registered devices. | |
5941 | * | |
5942 | * LOCKING: | |
5943 | * Inherited from calling layer (may sleep). | |
5944 | * | |
5945 | * RETURNS: | |
5946 | * 0 on success, -errno otherwise. | |
5947 | */ | |
5948 | int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) | |
5949 | { | |
5950 | int i, rc; | |
5951 | ||
5952 | /* host must have been started */ | |
5953 | if (!(host->flags & ATA_HOST_STARTED)) { | |
5954 | dev_printk(KERN_ERR, host->dev, | |
5955 | "BUG: trying to register unstarted host\n"); | |
5956 | WARN_ON(1); | |
5957 | return -EINVAL; | |
5958 | } | |
5959 | ||
5960 | /* Blow away unused ports. This happens when LLD can't | |
5961 | * determine the exact number of ports to allocate at | |
5962 | * allocation time. | |
5963 | */ | |
5964 | for (i = host->n_ports; host->ports[i]; i++) | |
5965 | kfree(host->ports[i]); | |
5966 | ||
5967 | /* give ports names and add SCSI hosts */ | |
5968 | for (i = 0; i < host->n_ports; i++) | |
5969 | host->ports[i]->print_id = ata_print_id++; | |
5970 | ||
d9027470 GG |
5971 | |
5972 | /* Create associated sysfs transport objects */ | |
5973 | for (i = 0; i < host->n_ports; i++) { | |
5974 | rc = ata_tport_add(host->dev,host->ports[i]); | |
5975 | if (rc) { | |
5976 | goto err_tadd; | |
5977 | } | |
5978 | } | |
5979 | ||
f3187195 TH |
5980 | rc = ata_scsi_add_hosts(host, sht); |
5981 | if (rc) | |
d9027470 | 5982 | goto err_tadd; |
f3187195 | 5983 | |
fafbae87 TH |
5984 | /* associate with ACPI nodes */ |
5985 | ata_acpi_associate(host); | |
5986 | ||
f3187195 TH |
5987 | /* set cable, sata_spd_limit and report */ |
5988 | for (i = 0; i < host->n_ports; i++) { | |
5989 | struct ata_port *ap = host->ports[i]; | |
f3187195 TH |
5990 | unsigned long xfer_mask; |
5991 | ||
5992 | /* set SATA cable type if still unset */ | |
5993 | if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) | |
5994 | ap->cbl = ATA_CBL_SATA; | |
5995 | ||
5996 | /* init sata_spd_limit to the current value */ | |
4fb37a25 | 5997 | sata_link_init_spd(&ap->link); |
b1c72916 TH |
5998 | if (ap->slave_link) |
5999 | sata_link_init_spd(ap->slave_link); | |
f3187195 | 6000 | |
cbcdd875 | 6001 | /* print per-port info to dmesg */ |
f3187195 TH |
6002 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, |
6003 | ap->udma_mask); | |
6004 | ||
abf6e8ed | 6005 | if (!ata_port_is_dummy(ap)) { |
cbcdd875 TH |
6006 | ata_port_printk(ap, KERN_INFO, |
6007 | "%cATA max %s %s\n", | |
a16abc0b | 6008 | (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', |
f3187195 | 6009 | ata_mode_string(xfer_mask), |
cbcdd875 | 6010 | ap->link.eh_info.desc); |
abf6e8ed TH |
6011 | ata_ehi_clear_desc(&ap->link.eh_info); |
6012 | } else | |
f3187195 TH |
6013 | ata_port_printk(ap, KERN_INFO, "DUMMY\n"); |
6014 | } | |
6015 | ||
f6005354 | 6016 | /* perform each probe asynchronously */ |
f3187195 TH |
6017 | for (i = 0; i < host->n_ports; i++) { |
6018 | struct ata_port *ap = host->ports[i]; | |
79318057 | 6019 | async_schedule(async_port_probe, ap); |
f3187195 | 6020 | } |
f3187195 TH |
6021 | |
6022 | return 0; | |
d9027470 GG |
6023 | |
6024 | err_tadd: | |
6025 | while (--i >= 0) { | |
6026 | ata_tport_delete(host->ports[i]); | |
6027 | } | |
6028 | return rc; | |
6029 | ||
f3187195 TH |
6030 | } |
6031 | ||
f5cda257 TH |
6032 | /** |
6033 | * ata_host_activate - start host, request IRQ and register it | |
6034 | * @host: target ATA host | |
6035 | * @irq: IRQ to request | |
6036 | * @irq_handler: irq_handler used when requesting IRQ | |
6037 | * @irq_flags: irq_flags used when requesting IRQ | |
6038 | * @sht: scsi_host_template to use when registering the host | |
6039 | * | |
6040 | * After allocating an ATA host and initializing it, most libata | |
6041 | * LLDs perform three steps to activate the host - start host, | |
6042 | * request IRQ and register it. This helper takes necessasry | |
6043 | * arguments and performs the three steps in one go. | |
6044 | * | |
3d46b2e2 PM |
6045 | * An invalid IRQ skips the IRQ registration and expects the host to |
6046 | * have set polling mode on the port. In this case, @irq_handler | |
6047 | * should be NULL. | |
6048 | * | |
f5cda257 TH |
6049 | * LOCKING: |
6050 | * Inherited from calling layer (may sleep). | |
6051 | * | |
6052 | * RETURNS: | |
6053 | * 0 on success, -errno otherwise. | |
6054 | */ | |
6055 | int ata_host_activate(struct ata_host *host, int irq, | |
6056 | irq_handler_t irq_handler, unsigned long irq_flags, | |
6057 | struct scsi_host_template *sht) | |
6058 | { | |
cbcdd875 | 6059 | int i, rc; |
f5cda257 TH |
6060 | |
6061 | rc = ata_host_start(host); | |
6062 | if (rc) | |
6063 | return rc; | |
6064 | ||
3d46b2e2 PM |
6065 | /* Special case for polling mode */ |
6066 | if (!irq) { | |
6067 | WARN_ON(irq_handler); | |
6068 | return ata_host_register(host, sht); | |
6069 | } | |
6070 | ||
f5cda257 TH |
6071 | rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, |
6072 | dev_driver_string(host->dev), host); | |
6073 | if (rc) | |
6074 | return rc; | |
6075 | ||
cbcdd875 TH |
6076 | for (i = 0; i < host->n_ports; i++) |
6077 | ata_port_desc(host->ports[i], "irq %d", irq); | |
4031826b | 6078 | |
f5cda257 TH |
6079 | rc = ata_host_register(host, sht); |
6080 | /* if failed, just free the IRQ and leave ports alone */ | |
6081 | if (rc) | |
6082 | devm_free_irq(host->dev, irq, host); | |
6083 | ||
6084 | return rc; | |
6085 | } | |
6086 | ||
720ba126 TH |
6087 | /** |
6088 | * ata_port_detach - Detach ATA port in prepration of device removal | |
6089 | * @ap: ATA port to be detached | |
6090 | * | |
6091 | * Detach all ATA devices and the associated SCSI devices of @ap; | |
6092 | * then, remove the associated SCSI host. @ap is guaranteed to | |
6093 | * be quiescent on return from this function. | |
6094 | * | |
6095 | * LOCKING: | |
6096 | * Kernel thread context (may sleep). | |
6097 | */ | |
741b7763 | 6098 | static void ata_port_detach(struct ata_port *ap) |
720ba126 TH |
6099 | { |
6100 | unsigned long flags; | |
720ba126 TH |
6101 | |
6102 | if (!ap->ops->error_handler) | |
c3cf30a9 | 6103 | goto skip_eh; |
720ba126 TH |
6104 | |
6105 | /* tell EH we're leaving & flush EH */ | |
ba6a1308 | 6106 | spin_lock_irqsave(ap->lock, flags); |
b51e9e5d | 6107 | ap->pflags |= ATA_PFLAG_UNLOADING; |
ece180d1 | 6108 | ata_port_schedule_eh(ap); |
ba6a1308 | 6109 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 | 6110 | |
ece180d1 | 6111 | /* wait till EH commits suicide */ |
720ba126 TH |
6112 | ata_port_wait_eh(ap); |
6113 | ||
ece180d1 TH |
6114 | /* it better be dead now */ |
6115 | WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED)); | |
720ba126 | 6116 | |
45a66c1c | 6117 | cancel_rearming_delayed_work(&ap->hotplug_task); |
720ba126 | 6118 | |
c3cf30a9 | 6119 | skip_eh: |
d9027470 GG |
6120 | if (ap->pmp_link) { |
6121 | int i; | |
6122 | for (i = 0; i < SATA_PMP_MAX_PORTS; i++) | |
6123 | ata_tlink_delete(&ap->pmp_link[i]); | |
6124 | } | |
6125 | ata_tport_delete(ap); | |
6126 | ||
720ba126 | 6127 | /* remove the associated SCSI host */ |
cca3974e | 6128 | scsi_remove_host(ap->scsi_host); |
720ba126 TH |
6129 | } |
6130 | ||
0529c159 TH |
6131 | /** |
6132 | * ata_host_detach - Detach all ports of an ATA host | |
6133 | * @host: Host to detach | |
6134 | * | |
6135 | * Detach all ports of @host. | |
6136 | * | |
6137 | * LOCKING: | |
6138 | * Kernel thread context (may sleep). | |
6139 | */ | |
6140 | void ata_host_detach(struct ata_host *host) | |
6141 | { | |
6142 | int i; | |
6143 | ||
6144 | for (i = 0; i < host->n_ports; i++) | |
6145 | ata_port_detach(host->ports[i]); | |
562f0c2d TH |
6146 | |
6147 | /* the host is dead now, dissociate ACPI */ | |
6148 | ata_acpi_dissociate(host); | |
0529c159 TH |
6149 | } |
6150 | ||
374b1873 JG |
6151 | #ifdef CONFIG_PCI |
6152 | ||
1da177e4 LT |
6153 | /** |
6154 | * ata_pci_remove_one - PCI layer callback for device removal | |
6155 | * @pdev: PCI device that was removed | |
6156 | * | |
b878ca5d TH |
6157 | * PCI layer indicates to libata via this hook that hot-unplug or |
6158 | * module unload event has occurred. Detach all ports. Resource | |
6159 | * release is handled via devres. | |
1da177e4 LT |
6160 | * |
6161 | * LOCKING: | |
6162 | * Inherited from PCI layer (may sleep). | |
6163 | */ | |
f0d36efd | 6164 | void ata_pci_remove_one(struct pci_dev *pdev) |
1da177e4 | 6165 | { |
2855568b | 6166 | struct device *dev = &pdev->dev; |
cca3974e | 6167 | struct ata_host *host = dev_get_drvdata(dev); |
1da177e4 | 6168 | |
b878ca5d | 6169 | ata_host_detach(host); |
1da177e4 LT |
6170 | } |
6171 | ||
6172 | /* move to PCI subsystem */ | |
057ace5e | 6173 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
6174 | { |
6175 | unsigned long tmp = 0; | |
6176 | ||
6177 | switch (bits->width) { | |
6178 | case 1: { | |
6179 | u8 tmp8 = 0; | |
6180 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
6181 | tmp = tmp8; | |
6182 | break; | |
6183 | } | |
6184 | case 2: { | |
6185 | u16 tmp16 = 0; | |
6186 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
6187 | tmp = tmp16; | |
6188 | break; | |
6189 | } | |
6190 | case 4: { | |
6191 | u32 tmp32 = 0; | |
6192 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
6193 | tmp = tmp32; | |
6194 | break; | |
6195 | } | |
6196 | ||
6197 | default: | |
6198 | return -EINVAL; | |
6199 | } | |
6200 | ||
6201 | tmp &= bits->mask; | |
6202 | ||
6203 | return (tmp == bits->val) ? 1 : 0; | |
6204 | } | |
9b847548 | 6205 | |
6ffa01d8 | 6206 | #ifdef CONFIG_PM |
3c5100c1 | 6207 | void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) |
9b847548 JA |
6208 | { |
6209 | pci_save_state(pdev); | |
4c90d971 | 6210 | pci_disable_device(pdev); |
500530f6 | 6211 | |
3a2d5b70 | 6212 | if (mesg.event & PM_EVENT_SLEEP) |
500530f6 | 6213 | pci_set_power_state(pdev, PCI_D3hot); |
9b847548 JA |
6214 | } |
6215 | ||
553c4aa6 | 6216 | int ata_pci_device_do_resume(struct pci_dev *pdev) |
9b847548 | 6217 | { |
553c4aa6 TH |
6218 | int rc; |
6219 | ||
9b847548 JA |
6220 | pci_set_power_state(pdev, PCI_D0); |
6221 | pci_restore_state(pdev); | |
553c4aa6 | 6222 | |
b878ca5d | 6223 | rc = pcim_enable_device(pdev); |
553c4aa6 TH |
6224 | if (rc) { |
6225 | dev_printk(KERN_ERR, &pdev->dev, | |
6226 | "failed to enable device after resume (%d)\n", rc); | |
6227 | return rc; | |
6228 | } | |
6229 | ||
9b847548 | 6230 | pci_set_master(pdev); |
553c4aa6 | 6231 | return 0; |
500530f6 TH |
6232 | } |
6233 | ||
3c5100c1 | 6234 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) |
500530f6 | 6235 | { |
cca3974e | 6236 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
500530f6 TH |
6237 | int rc = 0; |
6238 | ||
cca3974e | 6239 | rc = ata_host_suspend(host, mesg); |
500530f6 TH |
6240 | if (rc) |
6241 | return rc; | |
6242 | ||
3c5100c1 | 6243 | ata_pci_device_do_suspend(pdev, mesg); |
500530f6 TH |
6244 | |
6245 | return 0; | |
6246 | } | |
6247 | ||
6248 | int ata_pci_device_resume(struct pci_dev *pdev) | |
6249 | { | |
cca3974e | 6250 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
553c4aa6 | 6251 | int rc; |
500530f6 | 6252 | |
553c4aa6 TH |
6253 | rc = ata_pci_device_do_resume(pdev); |
6254 | if (rc == 0) | |
6255 | ata_host_resume(host); | |
6256 | return rc; | |
9b847548 | 6257 | } |
6ffa01d8 TH |
6258 | #endif /* CONFIG_PM */ |
6259 | ||
1da177e4 LT |
6260 | #endif /* CONFIG_PCI */ |
6261 | ||
33267325 TH |
6262 | static int __init ata_parse_force_one(char **cur, |
6263 | struct ata_force_ent *force_ent, | |
6264 | const char **reason) | |
6265 | { | |
6266 | /* FIXME: Currently, there's no way to tag init const data and | |
6267 | * using __initdata causes build failure on some versions of | |
6268 | * gcc. Once __initdataconst is implemented, add const to the | |
6269 | * following structure. | |
6270 | */ | |
6271 | static struct ata_force_param force_tbl[] __initdata = { | |
6272 | { "40c", .cbl = ATA_CBL_PATA40 }, | |
6273 | { "80c", .cbl = ATA_CBL_PATA80 }, | |
6274 | { "short40c", .cbl = ATA_CBL_PATA40_SHORT }, | |
6275 | { "unk", .cbl = ATA_CBL_PATA_UNK }, | |
6276 | { "ign", .cbl = ATA_CBL_PATA_IGN }, | |
6277 | { "sata", .cbl = ATA_CBL_SATA }, | |
6278 | { "1.5Gbps", .spd_limit = 1 }, | |
6279 | { "3.0Gbps", .spd_limit = 2 }, | |
6280 | { "noncq", .horkage_on = ATA_HORKAGE_NONCQ }, | |
6281 | { "ncq", .horkage_off = ATA_HORKAGE_NONCQ }, | |
43c9c591 | 6282 | { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID }, |
33267325 TH |
6283 | { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) }, |
6284 | { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) }, | |
6285 | { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) }, | |
6286 | { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) }, | |
6287 | { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) }, | |
6288 | { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) }, | |
6289 | { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) }, | |
6290 | { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) }, | |
6291 | { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) }, | |
6292 | { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) }, | |
6293 | { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) }, | |
6294 | { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) }, | |
6295 | { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
6296 | { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
6297 | { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
6298 | { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
6299 | { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
6300 | { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
6301 | { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
6302 | { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
6303 | { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
6304 | { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
6305 | { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
6306 | { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
6307 | { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
6308 | { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
6309 | { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
6310 | { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
6311 | { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
6312 | { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
6313 | { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
6314 | { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
6315 | { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
6316 | { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) }, | |
05944bdf TH |
6317 | { "nohrst", .lflags = ATA_LFLAG_NO_HRST }, |
6318 | { "nosrst", .lflags = ATA_LFLAG_NO_SRST }, | |
6319 | { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST }, | |
33267325 TH |
6320 | }; |
6321 | char *start = *cur, *p = *cur; | |
6322 | char *id, *val, *endp; | |
6323 | const struct ata_force_param *match_fp = NULL; | |
6324 | int nr_matches = 0, i; | |
6325 | ||
6326 | /* find where this param ends and update *cur */ | |
6327 | while (*p != '\0' && *p != ',') | |
6328 | p++; | |
6329 | ||
6330 | if (*p == '\0') | |
6331 | *cur = p; | |
6332 | else | |
6333 | *cur = p + 1; | |
6334 | ||
6335 | *p = '\0'; | |
6336 | ||
6337 | /* parse */ | |
6338 | p = strchr(start, ':'); | |
6339 | if (!p) { | |
6340 | val = strstrip(start); | |
6341 | goto parse_val; | |
6342 | } | |
6343 | *p = '\0'; | |
6344 | ||
6345 | id = strstrip(start); | |
6346 | val = strstrip(p + 1); | |
6347 | ||
6348 | /* parse id */ | |
6349 | p = strchr(id, '.'); | |
6350 | if (p) { | |
6351 | *p++ = '\0'; | |
6352 | force_ent->device = simple_strtoul(p, &endp, 10); | |
6353 | if (p == endp || *endp != '\0') { | |
6354 | *reason = "invalid device"; | |
6355 | return -EINVAL; | |
6356 | } | |
6357 | } | |
6358 | ||
6359 | force_ent->port = simple_strtoul(id, &endp, 10); | |
6360 | if (p == endp || *endp != '\0') { | |
6361 | *reason = "invalid port/link"; | |
6362 | return -EINVAL; | |
6363 | } | |
6364 | ||
6365 | parse_val: | |
6366 | /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */ | |
6367 | for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { | |
6368 | const struct ata_force_param *fp = &force_tbl[i]; | |
6369 | ||
6370 | if (strncasecmp(val, fp->name, strlen(val))) | |
6371 | continue; | |
6372 | ||
6373 | nr_matches++; | |
6374 | match_fp = fp; | |
6375 | ||
6376 | if (strcasecmp(val, fp->name) == 0) { | |
6377 | nr_matches = 1; | |
6378 | break; | |
6379 | } | |
6380 | } | |
6381 | ||
6382 | if (!nr_matches) { | |
6383 | *reason = "unknown value"; | |
6384 | return -EINVAL; | |
6385 | } | |
6386 | if (nr_matches > 1) { | |
6387 | *reason = "ambigious value"; | |
6388 | return -EINVAL; | |
6389 | } | |
6390 | ||
6391 | force_ent->param = *match_fp; | |
6392 | ||
6393 | return 0; | |
6394 | } | |
6395 | ||
6396 | static void __init ata_parse_force_param(void) | |
6397 | { | |
6398 | int idx = 0, size = 1; | |
6399 | int last_port = -1, last_device = -1; | |
6400 | char *p, *cur, *next; | |
6401 | ||
6402 | /* calculate maximum number of params and allocate force_tbl */ | |
6403 | for (p = ata_force_param_buf; *p; p++) | |
6404 | if (*p == ',') | |
6405 | size++; | |
6406 | ||
6407 | ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL); | |
6408 | if (!ata_force_tbl) { | |
6409 | printk(KERN_WARNING "ata: failed to extend force table, " | |
6410 | "libata.force ignored\n"); | |
6411 | return; | |
6412 | } | |
6413 | ||
6414 | /* parse and populate the table */ | |
6415 | for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { | |
6416 | const char *reason = ""; | |
6417 | struct ata_force_ent te = { .port = -1, .device = -1 }; | |
6418 | ||
6419 | next = cur; | |
6420 | if (ata_parse_force_one(&next, &te, &reason)) { | |
6421 | printk(KERN_WARNING "ata: failed to parse force " | |
6422 | "parameter \"%s\" (%s)\n", | |
6423 | cur, reason); | |
6424 | continue; | |
6425 | } | |
6426 | ||
6427 | if (te.port == -1) { | |
6428 | te.port = last_port; | |
6429 | te.device = last_device; | |
6430 | } | |
6431 | ||
6432 | ata_force_tbl[idx++] = te; | |
6433 | ||
6434 | last_port = te.port; | |
6435 | last_device = te.device; | |
6436 | } | |
6437 | ||
6438 | ata_force_tbl_size = idx; | |
6439 | } | |
1da177e4 | 6440 | |
1da177e4 LT |
6441 | static int __init ata_init(void) |
6442 | { | |
d9027470 | 6443 | int rc; |
270390e1 | 6444 | |
33267325 TH |
6445 | ata_parse_force_param(); |
6446 | ||
270390e1 | 6447 | rc = ata_sff_init(); |
ad72cf98 TH |
6448 | if (rc) { |
6449 | kfree(ata_force_tbl); | |
6450 | return rc; | |
6451 | } | |
453b07ac | 6452 | |
d9027470 GG |
6453 | libata_transport_init(); |
6454 | ata_scsi_transport_template = ata_attach_transport(); | |
6455 | if (!ata_scsi_transport_template) { | |
6456 | ata_sff_exit(); | |
6457 | rc = -ENOMEM; | |
6458 | goto err_out; | |
6459 | } | |
6460 | ||
1da177e4 LT |
6461 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
6462 | return 0; | |
d9027470 GG |
6463 | |
6464 | err_out: | |
6465 | return rc; | |
1da177e4 LT |
6466 | } |
6467 | ||
6468 | static void __exit ata_exit(void) | |
6469 | { | |
d9027470 GG |
6470 | ata_release_transport(ata_scsi_transport_template); |
6471 | libata_transport_exit(); | |
270390e1 | 6472 | ata_sff_exit(); |
33267325 | 6473 | kfree(ata_force_tbl); |
1da177e4 LT |
6474 | } |
6475 | ||
a4625085 | 6476 | subsys_initcall(ata_init); |
1da177e4 LT |
6477 | module_exit(ata_exit); |
6478 | ||
9990b6f3 | 6479 | static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1); |
67846b30 JG |
6480 | |
6481 | int ata_ratelimit(void) | |
6482 | { | |
9990b6f3 | 6483 | return __ratelimit(&ratelimit); |
67846b30 JG |
6484 | } |
6485 | ||
c22daff4 TH |
6486 | /** |
6487 | * ata_wait_register - wait until register value changes | |
6488 | * @reg: IO-mapped register | |
6489 | * @mask: Mask to apply to read register value | |
6490 | * @val: Wait condition | |
341c2c95 TH |
6491 | * @interval: polling interval in milliseconds |
6492 | * @timeout: timeout in milliseconds | |
c22daff4 TH |
6493 | * |
6494 | * Waiting for some bits of register to change is a common | |
6495 | * operation for ATA controllers. This function reads 32bit LE | |
6496 | * IO-mapped register @reg and tests for the following condition. | |
6497 | * | |
6498 | * (*@reg & mask) != val | |
6499 | * | |
6500 | * If the condition is met, it returns; otherwise, the process is | |
6501 | * repeated after @interval_msec until timeout. | |
6502 | * | |
6503 | * LOCKING: | |
6504 | * Kernel thread context (may sleep) | |
6505 | * | |
6506 | * RETURNS: | |
6507 | * The final register value. | |
6508 | */ | |
6509 | u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, | |
341c2c95 | 6510 | unsigned long interval, unsigned long timeout) |
c22daff4 | 6511 | { |
341c2c95 | 6512 | unsigned long deadline; |
c22daff4 TH |
6513 | u32 tmp; |
6514 | ||
6515 | tmp = ioread32(reg); | |
6516 | ||
6517 | /* Calculate timeout _after_ the first read to make sure | |
6518 | * preceding writes reach the controller before starting to | |
6519 | * eat away the timeout. | |
6520 | */ | |
341c2c95 | 6521 | deadline = ata_deadline(jiffies, timeout); |
c22daff4 | 6522 | |
341c2c95 TH |
6523 | while ((tmp & mask) == val && time_before(jiffies, deadline)) { |
6524 | msleep(interval); | |
c22daff4 TH |
6525 | tmp = ioread32(reg); |
6526 | } | |
6527 | ||
6528 | return tmp; | |
6529 | } | |
6530 | ||
dd5b06c4 TH |
6531 | /* |
6532 | * Dummy port_ops | |
6533 | */ | |
182d7bba | 6534 | static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) |
dd5b06c4 | 6535 | { |
182d7bba | 6536 | return AC_ERR_SYSTEM; |
dd5b06c4 TH |
6537 | } |
6538 | ||
182d7bba | 6539 | static void ata_dummy_error_handler(struct ata_port *ap) |
dd5b06c4 | 6540 | { |
182d7bba | 6541 | /* truly dummy */ |
dd5b06c4 TH |
6542 | } |
6543 | ||
029cfd6b | 6544 | struct ata_port_operations ata_dummy_port_ops = { |
dd5b06c4 TH |
6545 | .qc_prep = ata_noop_qc_prep, |
6546 | .qc_issue = ata_dummy_qc_issue, | |
182d7bba | 6547 | .error_handler = ata_dummy_error_handler, |
dd5b06c4 TH |
6548 | }; |
6549 | ||
21b0ad4f TH |
6550 | const struct ata_port_info ata_dummy_port_info = { |
6551 | .port_ops = &ata_dummy_port_ops, | |
6552 | }; | |
6553 | ||
1da177e4 LT |
6554 | /* |
6555 | * libata is essentially a library of internal helper functions for | |
6556 | * low-level ATA host controller drivers. As such, the API/ABI is | |
6557 | * likely to change as new drivers are added and updated. | |
6558 | * Do not depend on ABI/API stability. | |
6559 | */ | |
e9c83914 TH |
6560 | EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
6561 | EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); | |
6562 | EXPORT_SYMBOL_GPL(sata_deb_timing_long); | |
029cfd6b TH |
6563 | EXPORT_SYMBOL_GPL(ata_base_port_ops); |
6564 | EXPORT_SYMBOL_GPL(sata_port_ops); | |
dd5b06c4 | 6565 | EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
21b0ad4f | 6566 | EXPORT_SYMBOL_GPL(ata_dummy_port_info); |
1eca4365 TH |
6567 | EXPORT_SYMBOL_GPL(ata_link_next); |
6568 | EXPORT_SYMBOL_GPL(ata_dev_next); | |
1da177e4 | 6569 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
d8d9129e | 6570 | EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); |
cca3974e | 6571 | EXPORT_SYMBOL_GPL(ata_host_init); |
f3187195 | 6572 | EXPORT_SYMBOL_GPL(ata_host_alloc); |
f5cda257 | 6573 | EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); |
b1c72916 | 6574 | EXPORT_SYMBOL_GPL(ata_slave_link_init); |
ecef7253 | 6575 | EXPORT_SYMBOL_GPL(ata_host_start); |
f3187195 | 6576 | EXPORT_SYMBOL_GPL(ata_host_register); |
f5cda257 | 6577 | EXPORT_SYMBOL_GPL(ata_host_activate); |
0529c159 | 6578 | EXPORT_SYMBOL_GPL(ata_host_detach); |
1da177e4 | 6579 | EXPORT_SYMBOL_GPL(ata_sg_init); |
f686bcb8 | 6580 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
dedaf2b0 | 6581 | EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); |
436d34b3 | 6582 | EXPORT_SYMBOL_GPL(atapi_cmd_type); |
1da177e4 LT |
6583 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
6584 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
6357357c TH |
6585 | EXPORT_SYMBOL_GPL(ata_pack_xfermask); |
6586 | EXPORT_SYMBOL_GPL(ata_unpack_xfermask); | |
6587 | EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); | |
6588 | EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); | |
6589 | EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); | |
6590 | EXPORT_SYMBOL_GPL(ata_mode_string); | |
6591 | EXPORT_SYMBOL_GPL(ata_id_xfermask); | |
04351821 | 6592 | EXPORT_SYMBOL_GPL(ata_do_set_mode); |
31cc23b3 | 6593 | EXPORT_SYMBOL_GPL(ata_std_qc_defer); |
e46834cd | 6594 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
10305f0f | 6595 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
3c567b7d | 6596 | EXPORT_SYMBOL_GPL(sata_set_spd); |
aa2731ad | 6597 | EXPORT_SYMBOL_GPL(ata_wait_after_reset); |
936fd732 TH |
6598 | EXPORT_SYMBOL_GPL(sata_link_debounce); |
6599 | EXPORT_SYMBOL_GPL(sata_link_resume); | |
1152b261 | 6600 | EXPORT_SYMBOL_GPL(sata_link_scr_lpm); |
0aa1113d | 6601 | EXPORT_SYMBOL_GPL(ata_std_prereset); |
cc0680a5 | 6602 | EXPORT_SYMBOL_GPL(sata_link_hardreset); |
57c9efdf | 6603 | EXPORT_SYMBOL_GPL(sata_std_hardreset); |
203c75b8 | 6604 | EXPORT_SYMBOL_GPL(ata_std_postreset); |
2e9edbf8 JG |
6605 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
6606 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
67846b30 | 6607 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
c22daff4 | 6608 | EXPORT_SYMBOL_GPL(ata_wait_register); |
1da177e4 | 6609 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); |
1da177e4 | 6610 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
83c47bcb | 6611 | EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); |
a6e6ce8e | 6612 | EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); |
34bf2170 TH |
6613 | EXPORT_SYMBOL_GPL(sata_scr_valid); |
6614 | EXPORT_SYMBOL_GPL(sata_scr_read); | |
6615 | EXPORT_SYMBOL_GPL(sata_scr_write); | |
6616 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); | |
936fd732 TH |
6617 | EXPORT_SYMBOL_GPL(ata_link_online); |
6618 | EXPORT_SYMBOL_GPL(ata_link_offline); | |
6ffa01d8 | 6619 | #ifdef CONFIG_PM |
cca3974e JG |
6620 | EXPORT_SYMBOL_GPL(ata_host_suspend); |
6621 | EXPORT_SYMBOL_GPL(ata_host_resume); | |
6ffa01d8 | 6622 | #endif /* CONFIG_PM */ |
6a62a04d TH |
6623 | EXPORT_SYMBOL_GPL(ata_id_string); |
6624 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
963e4975 | 6625 | EXPORT_SYMBOL_GPL(ata_do_dev_read_id); |
1da177e4 LT |
6626 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
6627 | ||
1bc4ccff | 6628 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
6357357c | 6629 | EXPORT_SYMBOL_GPL(ata_timing_find_mode); |
452503f9 AC |
6630 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
6631 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
a0f79b92 | 6632 | EXPORT_SYMBOL_GPL(ata_timing_cycle2mode); |
452503f9 | 6633 | |
1da177e4 LT |
6634 | #ifdef CONFIG_PCI |
6635 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
1da177e4 | 6636 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); |
6ffa01d8 | 6637 | #ifdef CONFIG_PM |
500530f6 TH |
6638 | EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
6639 | EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); | |
9b847548 JA |
6640 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
6641 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
6ffa01d8 | 6642 | #endif /* CONFIG_PM */ |
1da177e4 | 6643 | #endif /* CONFIG_PCI */ |
9b847548 | 6644 | |
b64bbc39 TH |
6645 | EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); |
6646 | EXPORT_SYMBOL_GPL(ata_ehi_push_desc); | |
6647 | EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); | |
cbcdd875 TH |
6648 | EXPORT_SYMBOL_GPL(ata_port_desc); |
6649 | #ifdef CONFIG_PCI | |
6650 | EXPORT_SYMBOL_GPL(ata_port_pbar_desc); | |
6651 | #endif /* CONFIG_PCI */ | |
7b70fc03 | 6652 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
dbd82616 | 6653 | EXPORT_SYMBOL_GPL(ata_link_abort); |
7b70fc03 | 6654 | EXPORT_SYMBOL_GPL(ata_port_abort); |
e3180499 | 6655 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
7d77b247 | 6656 | EXPORT_SYMBOL_GPL(sata_async_notification); |
e3180499 TH |
6657 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
6658 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); | |
ece1d636 TH |
6659 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
6660 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
10acf3b0 | 6661 | EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error); |
022bdb07 | 6662 | EXPORT_SYMBOL_GPL(ata_do_eh); |
a1efdaba | 6663 | EXPORT_SYMBOL_GPL(ata_std_error_handler); |
be0d18df AC |
6664 | |
6665 | EXPORT_SYMBOL_GPL(ata_cable_40wire); | |
6666 | EXPORT_SYMBOL_GPL(ata_cable_80wire); | |
6667 | EXPORT_SYMBOL_GPL(ata_cable_unknown); | |
c88f90c3 | 6668 | EXPORT_SYMBOL_GPL(ata_cable_ignore); |
be0d18df | 6669 | EXPORT_SYMBOL_GPL(ata_cable_sata); |