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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> |
1da177e4 | 61 | #include <scsi/scsi.h> |
193515d5 | 62 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
63 | #include <scsi/scsi_host.h> |
64 | #include <linux/libata.h> | |
1da177e4 | 65 | #include <asm/byteorder.h> |
140b5e59 | 66 | #include <linux/cdrom.h> |
1da177e4 LT |
67 | |
68 | #include "libata.h" | |
69 | ||
fda0efc5 | 70 | |
d7bb4cc7 | 71 | /* debounce timing parameters in msecs { interval, duration, timeout } */ |
e9c83914 TH |
72 | const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; |
73 | const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; | |
74 | const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; | |
d7bb4cc7 | 75 | |
029cfd6b | 76 | const struct ata_port_operations ata_base_port_ops = { |
0aa1113d | 77 | .prereset = ata_std_prereset, |
203c75b8 | 78 | .postreset = ata_std_postreset, |
a1efdaba | 79 | .error_handler = ata_std_error_handler, |
029cfd6b TH |
80 | }; |
81 | ||
82 | const struct ata_port_operations sata_port_ops = { | |
83 | .inherits = &ata_base_port_ops, | |
84 | ||
85 | .qc_defer = ata_std_qc_defer, | |
57c9efdf | 86 | .hardreset = sata_std_hardreset, |
029cfd6b TH |
87 | }; |
88 | ||
3373efd8 TH |
89 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
90 | u16 heads, u16 sectors); | |
91 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev); | |
218f3d30 JG |
92 | static unsigned int ata_dev_set_feature(struct ata_device *dev, |
93 | u8 enable, u8 feature); | |
3373efd8 | 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 LT |
98 | static struct workqueue_struct *ata_wq; |
99 | ||
453b07ac TH |
100 | struct workqueue_struct *ata_aux_wq; |
101 | ||
33267325 TH |
102 | struct ata_force_param { |
103 | const char *name; | |
104 | unsigned int cbl; | |
105 | int spd_limit; | |
106 | unsigned long xfer_mask; | |
107 | unsigned int horkage_on; | |
108 | unsigned int horkage_off; | |
05944bdf | 109 | unsigned int lflags; |
33267325 TH |
110 | }; |
111 | ||
112 | struct ata_force_ent { | |
113 | int port; | |
114 | int device; | |
115 | struct ata_force_param param; | |
116 | }; | |
117 | ||
118 | static struct ata_force_ent *ata_force_tbl; | |
119 | static int ata_force_tbl_size; | |
120 | ||
121 | static char ata_force_param_buf[PAGE_SIZE] __initdata; | |
7afb4222 TH |
122 | /* param_buf is thrown away after initialization, disallow read */ |
123 | module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); | |
33267325 TH |
124 | MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)"); |
125 | ||
2486fa56 | 126 | static int atapi_enabled = 1; |
1623c81e | 127 | module_param(atapi_enabled, int, 0444); |
ad5d8eac | 128 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])"); |
1623c81e | 129 | |
c5c61bda | 130 | static int atapi_dmadir = 0; |
95de719a | 131 | module_param(atapi_dmadir, int, 0444); |
ad5d8eac | 132 | MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)"); |
95de719a | 133 | |
baf4fdfa ML |
134 | int atapi_passthru16 = 1; |
135 | module_param(atapi_passthru16, int, 0444); | |
ad5d8eac | 136 | MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])"); |
baf4fdfa | 137 | |
c3c013a2 JG |
138 | int libata_fua = 0; |
139 | module_param_named(fua, libata_fua, int, 0444); | |
ad5d8eac | 140 | MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)"); |
c3c013a2 | 141 | |
2dcb407e | 142 | static int ata_ignore_hpa; |
1e999736 AC |
143 | module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); |
144 | MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); | |
145 | ||
b3a70601 AC |
146 | static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; |
147 | module_param_named(dma, libata_dma_mask, int, 0444); | |
148 | MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); | |
149 | ||
87fbc5a0 | 150 | static int ata_probe_timeout; |
a8601e5f AM |
151 | module_param(ata_probe_timeout, int, 0444); |
152 | MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); | |
153 | ||
6ebe9d86 | 154 | int libata_noacpi = 0; |
d7d0dad6 | 155 | module_param_named(noacpi, libata_noacpi, int, 0444); |
ad5d8eac | 156 | MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)"); |
11ef697b | 157 | |
ae8d4ee7 AC |
158 | int libata_allow_tpm = 0; |
159 | module_param_named(allow_tpm, libata_allow_tpm, int, 0444); | |
ad5d8eac | 160 | MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)"); |
ae8d4ee7 | 161 | |
1da177e4 LT |
162 | MODULE_AUTHOR("Jeff Garzik"); |
163 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
164 | MODULE_LICENSE("GPL"); | |
165 | MODULE_VERSION(DRV_VERSION); | |
166 | ||
0baab86b | 167 | |
9913ff8a TH |
168 | static bool ata_sstatus_online(u32 sstatus) |
169 | { | |
170 | return (sstatus & 0xf) == 0x3; | |
171 | } | |
172 | ||
1eca4365 TH |
173 | /** |
174 | * ata_link_next - link iteration helper | |
175 | * @link: the previous link, NULL to start | |
176 | * @ap: ATA port containing links to iterate | |
177 | * @mode: iteration mode, one of ATA_LITER_* | |
178 | * | |
179 | * LOCKING: | |
180 | * Host lock or EH context. | |
aadffb68 | 181 | * |
1eca4365 TH |
182 | * RETURNS: |
183 | * Pointer to the next link. | |
aadffb68 | 184 | */ |
1eca4365 TH |
185 | struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap, |
186 | enum ata_link_iter_mode mode) | |
aadffb68 | 187 | { |
1eca4365 TH |
188 | BUG_ON(mode != ATA_LITER_EDGE && |
189 | mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST); | |
190 | ||
aadffb68 | 191 | /* NULL link indicates start of iteration */ |
1eca4365 TH |
192 | if (!link) |
193 | switch (mode) { | |
194 | case ATA_LITER_EDGE: | |
195 | case ATA_LITER_PMP_FIRST: | |
196 | if (sata_pmp_attached(ap)) | |
197 | return ap->pmp_link; | |
198 | /* fall through */ | |
199 | case ATA_LITER_HOST_FIRST: | |
200 | return &ap->link; | |
201 | } | |
aadffb68 | 202 | |
1eca4365 TH |
203 | /* we just iterated over the host link, what's next? */ |
204 | if (link == &ap->link) | |
205 | switch (mode) { | |
206 | case ATA_LITER_HOST_FIRST: | |
207 | if (sata_pmp_attached(ap)) | |
208 | return ap->pmp_link; | |
209 | /* fall through */ | |
210 | case ATA_LITER_PMP_FIRST: | |
211 | if (unlikely(ap->slave_link)) | |
b1c72916 | 212 | return ap->slave_link; |
1eca4365 TH |
213 | /* fall through */ |
214 | case ATA_LITER_EDGE: | |
aadffb68 | 215 | return NULL; |
b1c72916 | 216 | } |
aadffb68 | 217 | |
b1c72916 TH |
218 | /* slave_link excludes PMP */ |
219 | if (unlikely(link == ap->slave_link)) | |
220 | return NULL; | |
221 | ||
1eca4365 | 222 | /* we were over a PMP link */ |
aadffb68 TH |
223 | if (++link < ap->pmp_link + ap->nr_pmp_links) |
224 | return link; | |
1eca4365 TH |
225 | |
226 | if (mode == ATA_LITER_PMP_FIRST) | |
227 | return &ap->link; | |
228 | ||
aadffb68 TH |
229 | return NULL; |
230 | } | |
231 | ||
1eca4365 TH |
232 | /** |
233 | * ata_dev_next - device iteration helper | |
234 | * @dev: the previous device, NULL to start | |
235 | * @link: ATA link containing devices to iterate | |
236 | * @mode: iteration mode, one of ATA_DITER_* | |
237 | * | |
238 | * LOCKING: | |
239 | * Host lock or EH context. | |
240 | * | |
241 | * RETURNS: | |
242 | * Pointer to the next device. | |
243 | */ | |
244 | struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link, | |
245 | enum ata_dev_iter_mode mode) | |
246 | { | |
247 | BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE && | |
248 | mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE); | |
249 | ||
250 | /* NULL dev indicates start of iteration */ | |
251 | if (!dev) | |
252 | switch (mode) { | |
253 | case ATA_DITER_ENABLED: | |
254 | case ATA_DITER_ALL: | |
255 | dev = link->device; | |
256 | goto check; | |
257 | case ATA_DITER_ENABLED_REVERSE: | |
258 | case ATA_DITER_ALL_REVERSE: | |
259 | dev = link->device + ata_link_max_devices(link) - 1; | |
260 | goto check; | |
261 | } | |
262 | ||
263 | next: | |
264 | /* move to the next one */ | |
265 | switch (mode) { | |
266 | case ATA_DITER_ENABLED: | |
267 | case ATA_DITER_ALL: | |
268 | if (++dev < link->device + ata_link_max_devices(link)) | |
269 | goto check; | |
270 | return NULL; | |
271 | case ATA_DITER_ENABLED_REVERSE: | |
272 | case ATA_DITER_ALL_REVERSE: | |
273 | if (--dev >= link->device) | |
274 | goto check; | |
275 | return NULL; | |
276 | } | |
277 | ||
278 | check: | |
279 | if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) && | |
280 | !ata_dev_enabled(dev)) | |
281 | goto next; | |
282 | return dev; | |
283 | } | |
284 | ||
b1c72916 TH |
285 | /** |
286 | * ata_dev_phys_link - find physical link for a device | |
287 | * @dev: ATA device to look up physical link for | |
288 | * | |
289 | * Look up physical link which @dev is attached to. Note that | |
290 | * this is different from @dev->link only when @dev is on slave | |
291 | * link. For all other cases, it's the same as @dev->link. | |
292 | * | |
293 | * LOCKING: | |
294 | * Don't care. | |
295 | * | |
296 | * RETURNS: | |
297 | * Pointer to the found physical link. | |
298 | */ | |
299 | struct ata_link *ata_dev_phys_link(struct ata_device *dev) | |
300 | { | |
301 | struct ata_port *ap = dev->link->ap; | |
302 | ||
303 | if (!ap->slave_link) | |
304 | return dev->link; | |
305 | if (!dev->devno) | |
306 | return &ap->link; | |
307 | return ap->slave_link; | |
308 | } | |
309 | ||
33267325 TH |
310 | /** |
311 | * ata_force_cbl - force cable type according to libata.force | |
4cdfa1b3 | 312 | * @ap: ATA port of interest |
33267325 TH |
313 | * |
314 | * Force cable type according to libata.force and whine about it. | |
315 | * The last entry which has matching port number is used, so it | |
316 | * can be specified as part of device force parameters. For | |
317 | * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the | |
318 | * same effect. | |
319 | * | |
320 | * LOCKING: | |
321 | * EH context. | |
322 | */ | |
323 | void ata_force_cbl(struct ata_port *ap) | |
324 | { | |
325 | int i; | |
326 | ||
327 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
328 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
329 | ||
330 | if (fe->port != -1 && fe->port != ap->print_id) | |
331 | continue; | |
332 | ||
333 | if (fe->param.cbl == ATA_CBL_NONE) | |
334 | continue; | |
335 | ||
336 | ap->cbl = fe->param.cbl; | |
337 | ata_port_printk(ap, KERN_NOTICE, | |
338 | "FORCE: cable set to %s\n", fe->param.name); | |
339 | return; | |
340 | } | |
341 | } | |
342 | ||
343 | /** | |
05944bdf | 344 | * ata_force_link_limits - force link limits according to libata.force |
33267325 TH |
345 | * @link: ATA link of interest |
346 | * | |
05944bdf TH |
347 | * Force link flags and SATA spd limit according to libata.force |
348 | * and whine about it. When only the port part is specified | |
349 | * (e.g. 1:), the limit applies to all links connected to both | |
350 | * the host link and all fan-out ports connected via PMP. If the | |
351 | * device part is specified as 0 (e.g. 1.00:), it specifies the | |
352 | * first fan-out link not the host link. Device number 15 always | |
b1c72916 TH |
353 | * points to the host link whether PMP is attached or not. If the |
354 | * controller has slave link, device number 16 points to it. | |
33267325 TH |
355 | * |
356 | * LOCKING: | |
357 | * EH context. | |
358 | */ | |
05944bdf | 359 | static void ata_force_link_limits(struct ata_link *link) |
33267325 | 360 | { |
05944bdf | 361 | bool did_spd = false; |
b1c72916 TH |
362 | int linkno = link->pmp; |
363 | int i; | |
33267325 TH |
364 | |
365 | if (ata_is_host_link(link)) | |
b1c72916 | 366 | linkno += 15; |
33267325 TH |
367 | |
368 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
369 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
370 | ||
371 | if (fe->port != -1 && fe->port != link->ap->print_id) | |
372 | continue; | |
373 | ||
374 | if (fe->device != -1 && fe->device != linkno) | |
375 | continue; | |
376 | ||
05944bdf TH |
377 | /* only honor the first spd limit */ |
378 | if (!did_spd && fe->param.spd_limit) { | |
379 | link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; | |
380 | ata_link_printk(link, KERN_NOTICE, | |
381 | "FORCE: PHY spd limit set to %s\n", | |
382 | fe->param.name); | |
383 | did_spd = true; | |
384 | } | |
33267325 | 385 | |
05944bdf TH |
386 | /* let lflags stack */ |
387 | if (fe->param.lflags) { | |
388 | link->flags |= fe->param.lflags; | |
389 | ata_link_printk(link, KERN_NOTICE, | |
390 | "FORCE: link flag 0x%x forced -> 0x%x\n", | |
391 | fe->param.lflags, link->flags); | |
392 | } | |
33267325 TH |
393 | } |
394 | } | |
395 | ||
396 | /** | |
397 | * ata_force_xfermask - force xfermask according to libata.force | |
398 | * @dev: ATA device of interest | |
399 | * | |
400 | * Force xfer_mask according to libata.force and whine about it. | |
401 | * For consistency with link selection, device number 15 selects | |
402 | * the first device connected to the host link. | |
403 | * | |
404 | * LOCKING: | |
405 | * EH context. | |
406 | */ | |
407 | static void ata_force_xfermask(struct ata_device *dev) | |
408 | { | |
409 | int devno = dev->link->pmp + dev->devno; | |
410 | int alt_devno = devno; | |
411 | int i; | |
412 | ||
b1c72916 TH |
413 | /* allow n.15/16 for devices attached to host port */ |
414 | if (ata_is_host_link(dev->link)) | |
415 | alt_devno += 15; | |
33267325 TH |
416 | |
417 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
418 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
419 | unsigned long pio_mask, mwdma_mask, udma_mask; | |
420 | ||
421 | if (fe->port != -1 && fe->port != dev->link->ap->print_id) | |
422 | continue; | |
423 | ||
424 | if (fe->device != -1 && fe->device != devno && | |
425 | fe->device != alt_devno) | |
426 | continue; | |
427 | ||
428 | if (!fe->param.xfer_mask) | |
429 | continue; | |
430 | ||
431 | ata_unpack_xfermask(fe->param.xfer_mask, | |
432 | &pio_mask, &mwdma_mask, &udma_mask); | |
433 | if (udma_mask) | |
434 | dev->udma_mask = udma_mask; | |
435 | else if (mwdma_mask) { | |
436 | dev->udma_mask = 0; | |
437 | dev->mwdma_mask = mwdma_mask; | |
438 | } else { | |
439 | dev->udma_mask = 0; | |
440 | dev->mwdma_mask = 0; | |
441 | dev->pio_mask = pio_mask; | |
442 | } | |
443 | ||
444 | ata_dev_printk(dev, KERN_NOTICE, | |
445 | "FORCE: xfer_mask set to %s\n", fe->param.name); | |
446 | return; | |
447 | } | |
448 | } | |
449 | ||
450 | /** | |
451 | * ata_force_horkage - force horkage according to libata.force | |
452 | * @dev: ATA device of interest | |
453 | * | |
454 | * Force horkage according to libata.force and whine about it. | |
455 | * For consistency with link selection, device number 15 selects | |
456 | * the first device connected to the host link. | |
457 | * | |
458 | * LOCKING: | |
459 | * EH context. | |
460 | */ | |
461 | static void ata_force_horkage(struct ata_device *dev) | |
462 | { | |
463 | int devno = dev->link->pmp + dev->devno; | |
464 | int alt_devno = devno; | |
465 | int i; | |
466 | ||
b1c72916 TH |
467 | /* allow n.15/16 for devices attached to host port */ |
468 | if (ata_is_host_link(dev->link)) | |
469 | alt_devno += 15; | |
33267325 TH |
470 | |
471 | for (i = 0; i < ata_force_tbl_size; i++) { | |
472 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
473 | ||
474 | if (fe->port != -1 && fe->port != dev->link->ap->print_id) | |
475 | continue; | |
476 | ||
477 | if (fe->device != -1 && fe->device != devno && | |
478 | fe->device != alt_devno) | |
479 | continue; | |
480 | ||
481 | if (!(~dev->horkage & fe->param.horkage_on) && | |
482 | !(dev->horkage & fe->param.horkage_off)) | |
483 | continue; | |
484 | ||
485 | dev->horkage |= fe->param.horkage_on; | |
486 | dev->horkage &= ~fe->param.horkage_off; | |
487 | ||
488 | ata_dev_printk(dev, KERN_NOTICE, | |
489 | "FORCE: horkage modified (%s)\n", fe->param.name); | |
490 | } | |
491 | } | |
492 | ||
436d34b3 TH |
493 | /** |
494 | * atapi_cmd_type - Determine ATAPI command type from SCSI opcode | |
495 | * @opcode: SCSI opcode | |
496 | * | |
497 | * Determine ATAPI command type from @opcode. | |
498 | * | |
499 | * LOCKING: | |
500 | * None. | |
501 | * | |
502 | * RETURNS: | |
503 | * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC} | |
504 | */ | |
505 | int atapi_cmd_type(u8 opcode) | |
506 | { | |
507 | switch (opcode) { | |
508 | case GPCMD_READ_10: | |
509 | case GPCMD_READ_12: | |
510 | return ATAPI_READ; | |
511 | ||
512 | case GPCMD_WRITE_10: | |
513 | case GPCMD_WRITE_12: | |
514 | case GPCMD_WRITE_AND_VERIFY_10: | |
515 | return ATAPI_WRITE; | |
516 | ||
517 | case GPCMD_READ_CD: | |
518 | case GPCMD_READ_CD_MSF: | |
519 | return ATAPI_READ_CD; | |
520 | ||
e52dcc48 TH |
521 | case ATA_16: |
522 | case ATA_12: | |
523 | if (atapi_passthru16) | |
524 | return ATAPI_PASS_THRU; | |
525 | /* fall thru */ | |
436d34b3 TH |
526 | default: |
527 | return ATAPI_MISC; | |
528 | } | |
529 | } | |
530 | ||
1da177e4 LT |
531 | /** |
532 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
533 | * @tf: Taskfile to convert | |
1da177e4 | 534 | * @pmp: Port multiplier port |
9977126c TH |
535 | * @is_cmd: This FIS is for command |
536 | * @fis: Buffer into which data will output | |
1da177e4 LT |
537 | * |
538 | * Converts a standard ATA taskfile to a Serial ATA | |
539 | * FIS structure (Register - Host to Device). | |
540 | * | |
541 | * LOCKING: | |
542 | * Inherited from caller. | |
543 | */ | |
9977126c | 544 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) |
1da177e4 | 545 | { |
9977126c TH |
546 | fis[0] = 0x27; /* Register - Host to Device FIS */ |
547 | fis[1] = pmp & 0xf; /* Port multiplier number*/ | |
548 | if (is_cmd) | |
549 | fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ | |
550 | ||
1da177e4 LT |
551 | fis[2] = tf->command; |
552 | fis[3] = tf->feature; | |
553 | ||
554 | fis[4] = tf->lbal; | |
555 | fis[5] = tf->lbam; | |
556 | fis[6] = tf->lbah; | |
557 | fis[7] = tf->device; | |
558 | ||
559 | fis[8] = tf->hob_lbal; | |
560 | fis[9] = tf->hob_lbam; | |
561 | fis[10] = tf->hob_lbah; | |
562 | fis[11] = tf->hob_feature; | |
563 | ||
564 | fis[12] = tf->nsect; | |
565 | fis[13] = tf->hob_nsect; | |
566 | fis[14] = 0; | |
567 | fis[15] = tf->ctl; | |
568 | ||
569 | fis[16] = 0; | |
570 | fis[17] = 0; | |
571 | fis[18] = 0; | |
572 | fis[19] = 0; | |
573 | } | |
574 | ||
575 | /** | |
576 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
577 | * @fis: Buffer from which data will be input | |
578 | * @tf: Taskfile to output | |
579 | * | |
e12a1be6 | 580 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
581 | * |
582 | * LOCKING: | |
583 | * Inherited from caller. | |
584 | */ | |
585 | ||
057ace5e | 586 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
587 | { |
588 | tf->command = fis[2]; /* status */ | |
589 | tf->feature = fis[3]; /* error */ | |
590 | ||
591 | tf->lbal = fis[4]; | |
592 | tf->lbam = fis[5]; | |
593 | tf->lbah = fis[6]; | |
594 | tf->device = fis[7]; | |
595 | ||
596 | tf->hob_lbal = fis[8]; | |
597 | tf->hob_lbam = fis[9]; | |
598 | tf->hob_lbah = fis[10]; | |
599 | ||
600 | tf->nsect = fis[12]; | |
601 | tf->hob_nsect = fis[13]; | |
602 | } | |
603 | ||
8cbd6df1 AL |
604 | static const u8 ata_rw_cmds[] = { |
605 | /* pio multi */ | |
606 | ATA_CMD_READ_MULTI, | |
607 | ATA_CMD_WRITE_MULTI, | |
608 | ATA_CMD_READ_MULTI_EXT, | |
609 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
610 | 0, |
611 | 0, | |
612 | 0, | |
613 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
614 | /* pio */ |
615 | ATA_CMD_PIO_READ, | |
616 | ATA_CMD_PIO_WRITE, | |
617 | ATA_CMD_PIO_READ_EXT, | |
618 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
619 | 0, |
620 | 0, | |
621 | 0, | |
622 | 0, | |
8cbd6df1 AL |
623 | /* dma */ |
624 | ATA_CMD_READ, | |
625 | ATA_CMD_WRITE, | |
626 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
627 | ATA_CMD_WRITE_EXT, |
628 | 0, | |
629 | 0, | |
630 | 0, | |
631 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 632 | }; |
1da177e4 LT |
633 | |
634 | /** | |
8cbd6df1 | 635 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
bd056d7e TH |
636 | * @tf: command to examine and configure |
637 | * @dev: device tf belongs to | |
1da177e4 | 638 | * |
2e9edbf8 | 639 | * Examine the device configuration and tf->flags to calculate |
8cbd6df1 | 640 | * the proper read/write commands and protocol to use. |
1da177e4 LT |
641 | * |
642 | * LOCKING: | |
643 | * caller. | |
644 | */ | |
bd056d7e | 645 | static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) |
1da177e4 | 646 | { |
9a3dccc4 | 647 | u8 cmd; |
1da177e4 | 648 | |
9a3dccc4 | 649 | int index, fua, lba48, write; |
2e9edbf8 | 650 | |
9a3dccc4 | 651 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
652 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
653 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 654 | |
8cbd6df1 AL |
655 | if (dev->flags & ATA_DFLAG_PIO) { |
656 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 657 | index = dev->multi_count ? 0 : 8; |
9af5c9c9 | 658 | } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { |
8d238e01 AC |
659 | /* Unable to use DMA due to host limitation */ |
660 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 661 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
662 | } else { |
663 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 664 | index = 16; |
8cbd6df1 | 665 | } |
1da177e4 | 666 | |
9a3dccc4 TH |
667 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
668 | if (cmd) { | |
669 | tf->command = cmd; | |
670 | return 0; | |
671 | } | |
672 | return -1; | |
1da177e4 LT |
673 | } |
674 | ||
35b649fe TH |
675 | /** |
676 | * ata_tf_read_block - Read block address from ATA taskfile | |
677 | * @tf: ATA taskfile of interest | |
678 | * @dev: ATA device @tf belongs to | |
679 | * | |
680 | * LOCKING: | |
681 | * None. | |
682 | * | |
683 | * Read block address from @tf. This function can handle all | |
684 | * three address formats - LBA, LBA48 and CHS. tf->protocol and | |
685 | * flags select the address format to use. | |
686 | * | |
687 | * RETURNS: | |
688 | * Block address read from @tf. | |
689 | */ | |
690 | u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) | |
691 | { | |
692 | u64 block = 0; | |
693 | ||
694 | if (tf->flags & ATA_TFLAG_LBA) { | |
695 | if (tf->flags & ATA_TFLAG_LBA48) { | |
696 | block |= (u64)tf->hob_lbah << 40; | |
697 | block |= (u64)tf->hob_lbam << 32; | |
44901a96 | 698 | block |= (u64)tf->hob_lbal << 24; |
35b649fe TH |
699 | } else |
700 | block |= (tf->device & 0xf) << 24; | |
701 | ||
702 | block |= tf->lbah << 16; | |
703 | block |= tf->lbam << 8; | |
704 | block |= tf->lbal; | |
705 | } else { | |
706 | u32 cyl, head, sect; | |
707 | ||
708 | cyl = tf->lbam | (tf->lbah << 8); | |
709 | head = tf->device & 0xf; | |
710 | sect = tf->lbal; | |
711 | ||
ac8672ea TH |
712 | if (!sect) { |
713 | ata_dev_printk(dev, KERN_WARNING, "device reported " | |
714 | "invalid CHS sector 0\n"); | |
715 | sect = 1; /* oh well */ | |
716 | } | |
717 | ||
718 | block = (cyl * dev->heads + head) * dev->sectors + sect - 1; | |
35b649fe TH |
719 | } |
720 | ||
721 | return block; | |
722 | } | |
723 | ||
bd056d7e TH |
724 | /** |
725 | * ata_build_rw_tf - Build ATA taskfile for given read/write request | |
726 | * @tf: Target ATA taskfile | |
727 | * @dev: ATA device @tf belongs to | |
728 | * @block: Block address | |
729 | * @n_block: Number of blocks | |
730 | * @tf_flags: RW/FUA etc... | |
731 | * @tag: tag | |
732 | * | |
733 | * LOCKING: | |
734 | * None. | |
735 | * | |
736 | * Build ATA taskfile @tf for read/write request described by | |
737 | * @block, @n_block, @tf_flags and @tag on @dev. | |
738 | * | |
739 | * RETURNS: | |
740 | * | |
741 | * 0 on success, -ERANGE if the request is too large for @dev, | |
742 | * -EINVAL if the request is invalid. | |
743 | */ | |
744 | int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, | |
745 | u64 block, u32 n_block, unsigned int tf_flags, | |
746 | unsigned int tag) | |
747 | { | |
748 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
749 | tf->flags |= tf_flags; | |
750 | ||
6d1245bf | 751 | if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
bd056d7e TH |
752 | /* yay, NCQ */ |
753 | if (!lba_48_ok(block, n_block)) | |
754 | return -ERANGE; | |
755 | ||
756 | tf->protocol = ATA_PROT_NCQ; | |
757 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
758 | ||
759 | if (tf->flags & ATA_TFLAG_WRITE) | |
760 | tf->command = ATA_CMD_FPDMA_WRITE; | |
761 | else | |
762 | tf->command = ATA_CMD_FPDMA_READ; | |
763 | ||
764 | tf->nsect = tag << 3; | |
765 | tf->hob_feature = (n_block >> 8) & 0xff; | |
766 | tf->feature = n_block & 0xff; | |
767 | ||
768 | tf->hob_lbah = (block >> 40) & 0xff; | |
769 | tf->hob_lbam = (block >> 32) & 0xff; | |
770 | tf->hob_lbal = (block >> 24) & 0xff; | |
771 | tf->lbah = (block >> 16) & 0xff; | |
772 | tf->lbam = (block >> 8) & 0xff; | |
773 | tf->lbal = block & 0xff; | |
774 | ||
775 | tf->device = 1 << 6; | |
776 | if (tf->flags & ATA_TFLAG_FUA) | |
777 | tf->device |= 1 << 7; | |
778 | } else if (dev->flags & ATA_DFLAG_LBA) { | |
779 | tf->flags |= ATA_TFLAG_LBA; | |
780 | ||
781 | if (lba_28_ok(block, n_block)) { | |
782 | /* use LBA28 */ | |
783 | tf->device |= (block >> 24) & 0xf; | |
784 | } else if (lba_48_ok(block, n_block)) { | |
785 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
786 | return -ERANGE; | |
787 | ||
788 | /* use LBA48 */ | |
789 | tf->flags |= ATA_TFLAG_LBA48; | |
790 | ||
791 | tf->hob_nsect = (n_block >> 8) & 0xff; | |
792 | ||
793 | tf->hob_lbah = (block >> 40) & 0xff; | |
794 | tf->hob_lbam = (block >> 32) & 0xff; | |
795 | tf->hob_lbal = (block >> 24) & 0xff; | |
796 | } else | |
797 | /* request too large even for LBA48 */ | |
798 | return -ERANGE; | |
799 | ||
800 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
801 | return -EINVAL; | |
802 | ||
803 | tf->nsect = n_block & 0xff; | |
804 | ||
805 | tf->lbah = (block >> 16) & 0xff; | |
806 | tf->lbam = (block >> 8) & 0xff; | |
807 | tf->lbal = block & 0xff; | |
808 | ||
809 | tf->device |= ATA_LBA; | |
810 | } else { | |
811 | /* CHS */ | |
812 | u32 sect, head, cyl, track; | |
813 | ||
814 | /* The request -may- be too large for CHS addressing. */ | |
815 | if (!lba_28_ok(block, n_block)) | |
816 | return -ERANGE; | |
817 | ||
818 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
819 | return -EINVAL; | |
820 | ||
821 | /* Convert LBA to CHS */ | |
822 | track = (u32)block / dev->sectors; | |
823 | cyl = track / dev->heads; | |
824 | head = track % dev->heads; | |
825 | sect = (u32)block % dev->sectors + 1; | |
826 | ||
827 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", | |
828 | (u32)block, track, cyl, head, sect); | |
829 | ||
830 | /* Check whether the converted CHS can fit. | |
831 | Cylinder: 0-65535 | |
832 | Head: 0-15 | |
833 | Sector: 1-255*/ | |
834 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
835 | return -ERANGE; | |
836 | ||
837 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
838 | tf->lbal = sect; | |
839 | tf->lbam = cyl; | |
840 | tf->lbah = cyl >> 8; | |
841 | tf->device |= head; | |
842 | } | |
843 | ||
844 | return 0; | |
845 | } | |
846 | ||
cb95d562 TH |
847 | /** |
848 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
849 | * @pio_mask: pio_mask | |
850 | * @mwdma_mask: mwdma_mask | |
851 | * @udma_mask: udma_mask | |
852 | * | |
853 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
854 | * unsigned int xfer_mask. | |
855 | * | |
856 | * LOCKING: | |
857 | * None. | |
858 | * | |
859 | * RETURNS: | |
860 | * Packed xfer_mask. | |
861 | */ | |
7dc951ae TH |
862 | unsigned long ata_pack_xfermask(unsigned long pio_mask, |
863 | unsigned long mwdma_mask, | |
864 | unsigned long udma_mask) | |
cb95d562 TH |
865 | { |
866 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
867 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
868 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
869 | } | |
870 | ||
c0489e4e TH |
871 | /** |
872 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
873 | * @xfer_mask: xfer_mask to unpack | |
874 | * @pio_mask: resulting pio_mask | |
875 | * @mwdma_mask: resulting mwdma_mask | |
876 | * @udma_mask: resulting udma_mask | |
877 | * | |
878 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
879 | * Any NULL distination masks will be ignored. | |
880 | */ | |
7dc951ae TH |
881 | void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask, |
882 | unsigned long *mwdma_mask, unsigned long *udma_mask) | |
c0489e4e TH |
883 | { |
884 | if (pio_mask) | |
885 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
886 | if (mwdma_mask) | |
887 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
888 | if (udma_mask) | |
889 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
890 | } | |
891 | ||
cb95d562 | 892 | static const struct ata_xfer_ent { |
be9a50c8 | 893 | int shift, bits; |
cb95d562 TH |
894 | u8 base; |
895 | } ata_xfer_tbl[] = { | |
70cd071e TH |
896 | { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, |
897 | { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, | |
898 | { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, | |
cb95d562 TH |
899 | { -1, }, |
900 | }; | |
901 | ||
902 | /** | |
903 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
904 | * @xfer_mask: xfer_mask of interest | |
905 | * | |
906 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
907 | * bit of @xfer_mask is considered. | |
908 | * | |
909 | * LOCKING: | |
910 | * None. | |
911 | * | |
912 | * RETURNS: | |
70cd071e | 913 | * Matching XFER_* value, 0xff if no match found. |
cb95d562 | 914 | */ |
7dc951ae | 915 | u8 ata_xfer_mask2mode(unsigned long xfer_mask) |
cb95d562 TH |
916 | { |
917 | int highbit = fls(xfer_mask) - 1; | |
918 | const struct ata_xfer_ent *ent; | |
919 | ||
920 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
921 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
922 | return ent->base + highbit - ent->shift; | |
70cd071e | 923 | return 0xff; |
cb95d562 TH |
924 | } |
925 | ||
926 | /** | |
927 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
928 | * @xfer_mode: XFER_* of interest | |
929 | * | |
930 | * Return matching xfer_mask for @xfer_mode. | |
931 | * | |
932 | * LOCKING: | |
933 | * None. | |
934 | * | |
935 | * RETURNS: | |
936 | * Matching xfer_mask, 0 if no match found. | |
937 | */ | |
7dc951ae | 938 | unsigned long ata_xfer_mode2mask(u8 xfer_mode) |
cb95d562 TH |
939 | { |
940 | const struct ata_xfer_ent *ent; | |
941 | ||
942 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
943 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
70cd071e TH |
944 | return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) |
945 | & ~((1 << ent->shift) - 1); | |
cb95d562 TH |
946 | return 0; |
947 | } | |
948 | ||
949 | /** | |
950 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
951 | * @xfer_mode: XFER_* of interest | |
952 | * | |
953 | * Return matching xfer_shift for @xfer_mode. | |
954 | * | |
955 | * LOCKING: | |
956 | * None. | |
957 | * | |
958 | * RETURNS: | |
959 | * Matching xfer_shift, -1 if no match found. | |
960 | */ | |
7dc951ae | 961 | int ata_xfer_mode2shift(unsigned long xfer_mode) |
cb95d562 TH |
962 | { |
963 | const struct ata_xfer_ent *ent; | |
964 | ||
965 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
966 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
967 | return ent->shift; | |
968 | return -1; | |
969 | } | |
970 | ||
1da177e4 | 971 | /** |
1da7b0d0 TH |
972 | * ata_mode_string - convert xfer_mask to string |
973 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
1da177e4 LT |
974 | * |
975 | * Determine string which represents the highest speed | |
1da7b0d0 | 976 | * (highest bit in @modemask). |
1da177e4 LT |
977 | * |
978 | * LOCKING: | |
979 | * None. | |
980 | * | |
981 | * RETURNS: | |
982 | * Constant C string representing highest speed listed in | |
1da7b0d0 | 983 | * @mode_mask, or the constant C string "<n/a>". |
1da177e4 | 984 | */ |
7dc951ae | 985 | const char *ata_mode_string(unsigned long xfer_mask) |
1da177e4 | 986 | { |
75f554bc TH |
987 | static const char * const xfer_mode_str[] = { |
988 | "PIO0", | |
989 | "PIO1", | |
990 | "PIO2", | |
991 | "PIO3", | |
992 | "PIO4", | |
b352e57d AC |
993 | "PIO5", |
994 | "PIO6", | |
75f554bc TH |
995 | "MWDMA0", |
996 | "MWDMA1", | |
997 | "MWDMA2", | |
b352e57d AC |
998 | "MWDMA3", |
999 | "MWDMA4", | |
75f554bc TH |
1000 | "UDMA/16", |
1001 | "UDMA/25", | |
1002 | "UDMA/33", | |
1003 | "UDMA/44", | |
1004 | "UDMA/66", | |
1005 | "UDMA/100", | |
1006 | "UDMA/133", | |
1007 | "UDMA7", | |
1008 | }; | |
1da7b0d0 | 1009 | int highbit; |
1da177e4 | 1010 | |
1da7b0d0 TH |
1011 | highbit = fls(xfer_mask) - 1; |
1012 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
1013 | return xfer_mode_str[highbit]; | |
1da177e4 | 1014 | return "<n/a>"; |
1da177e4 LT |
1015 | } |
1016 | ||
4c360c81 TH |
1017 | static const char *sata_spd_string(unsigned int spd) |
1018 | { | |
1019 | static const char * const spd_str[] = { | |
1020 | "1.5 Gbps", | |
1021 | "3.0 Gbps", | |
8522ee25 | 1022 | "6.0 Gbps", |
4c360c81 TH |
1023 | }; |
1024 | ||
1025 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) | |
1026 | return "<unknown>"; | |
1027 | return spd_str[spd - 1]; | |
1028 | } | |
1029 | ||
ca77329f KCA |
1030 | static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) |
1031 | { | |
1032 | struct ata_link *link = dev->link; | |
1033 | struct ata_port *ap = link->ap; | |
1034 | u32 scontrol; | |
1035 | unsigned int err_mask; | |
1036 | int rc; | |
1037 | ||
1038 | /* | |
1039 | * disallow DIPM for drivers which haven't set | |
1040 | * ATA_FLAG_IPM. This is because when DIPM is enabled, | |
1041 | * phy ready will be set in the interrupt status on | |
1042 | * state changes, which will cause some drivers to | |
1043 | * think there are errors - additionally drivers will | |
1044 | * need to disable hot plug. | |
1045 | */ | |
1046 | if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) { | |
1047 | ap->pm_policy = NOT_AVAILABLE; | |
1048 | return -EINVAL; | |
1049 | } | |
1050 | ||
1051 | /* | |
1052 | * For DIPM, we will only enable it for the | |
1053 | * min_power setting. | |
1054 | * | |
1055 | * Why? Because Disks are too stupid to know that | |
1056 | * If the host rejects a request to go to SLUMBER | |
1057 | * they should retry at PARTIAL, and instead it | |
1058 | * just would give up. So, for medium_power to | |
1059 | * work at all, we need to only allow HIPM. | |
1060 | */ | |
1061 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); | |
1062 | if (rc) | |
1063 | return rc; | |
1064 | ||
1065 | switch (policy) { | |
1066 | case MIN_POWER: | |
1067 | /* no restrictions on IPM transitions */ | |
1068 | scontrol &= ~(0x3 << 8); | |
1069 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
1070 | if (rc) | |
1071 | return rc; | |
1072 | ||
1073 | /* enable DIPM */ | |
1074 | if (dev->flags & ATA_DFLAG_DIPM) | |
1075 | err_mask = ata_dev_set_feature(dev, | |
1076 | SETFEATURES_SATA_ENABLE, SATA_DIPM); | |
1077 | break; | |
1078 | case MEDIUM_POWER: | |
1079 | /* allow IPM to PARTIAL */ | |
1080 | scontrol &= ~(0x1 << 8); | |
1081 | scontrol |= (0x2 << 8); | |
1082 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
1083 | if (rc) | |
1084 | return rc; | |
1085 | ||
f5456b63 KCA |
1086 | /* |
1087 | * we don't have to disable DIPM since IPM flags | |
1088 | * disallow transitions to SLUMBER, which effectively | |
1089 | * disable DIPM if it does not support PARTIAL | |
1090 | */ | |
ca77329f KCA |
1091 | break; |
1092 | case NOT_AVAILABLE: | |
1093 | case MAX_PERFORMANCE: | |
1094 | /* disable all IPM transitions */ | |
1095 | scontrol |= (0x3 << 8); | |
1096 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
1097 | if (rc) | |
1098 | return rc; | |
1099 | ||
f5456b63 KCA |
1100 | /* |
1101 | * we don't have to disable DIPM since IPM flags | |
1102 | * disallow all transitions which effectively | |
1103 | * disable DIPM anyway. | |
1104 | */ | |
ca77329f KCA |
1105 | break; |
1106 | } | |
1107 | ||
1108 | /* FIXME: handle SET FEATURES failure */ | |
1109 | (void) err_mask; | |
1110 | ||
1111 | return 0; | |
1112 | } | |
1113 | ||
1114 | /** | |
1115 | * ata_dev_enable_pm - enable SATA interface power management | |
48166fd9 SH |
1116 | * @dev: device to enable power management |
1117 | * @policy: the link power management policy | |
ca77329f KCA |
1118 | * |
1119 | * Enable SATA Interface power management. This will enable | |
1120 | * Device Interface Power Management (DIPM) for min_power | |
1121 | * policy, and then call driver specific callbacks for | |
1122 | * enabling Host Initiated Power management. | |
1123 | * | |
1124 | * Locking: Caller. | |
1125 | * Returns: -EINVAL if IPM is not supported, 0 otherwise. | |
1126 | */ | |
1127 | void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy) | |
1128 | { | |
1129 | int rc = 0; | |
1130 | struct ata_port *ap = dev->link->ap; | |
1131 | ||
1132 | /* set HIPM first, then DIPM */ | |
1133 | if (ap->ops->enable_pm) | |
1134 | rc = ap->ops->enable_pm(ap, policy); | |
1135 | if (rc) | |
1136 | goto enable_pm_out; | |
1137 | rc = ata_dev_set_dipm(dev, policy); | |
1138 | ||
1139 | enable_pm_out: | |
1140 | if (rc) | |
1141 | ap->pm_policy = MAX_PERFORMANCE; | |
1142 | else | |
1143 | ap->pm_policy = policy; | |
1144 | return /* rc */; /* hopefully we can use 'rc' eventually */ | |
1145 | } | |
1146 | ||
1992a5ed | 1147 | #ifdef CONFIG_PM |
ca77329f KCA |
1148 | /** |
1149 | * ata_dev_disable_pm - disable SATA interface power management | |
48166fd9 | 1150 | * @dev: device to disable power management |
ca77329f KCA |
1151 | * |
1152 | * Disable SATA Interface power management. This will disable | |
1153 | * Device Interface Power Management (DIPM) without changing | |
1154 | * policy, call driver specific callbacks for disabling Host | |
1155 | * Initiated Power management. | |
1156 | * | |
1157 | * Locking: Caller. | |
1158 | * Returns: void | |
1159 | */ | |
1160 | static void ata_dev_disable_pm(struct ata_device *dev) | |
1161 | { | |
1162 | struct ata_port *ap = dev->link->ap; | |
1163 | ||
1164 | ata_dev_set_dipm(dev, MAX_PERFORMANCE); | |
1165 | if (ap->ops->disable_pm) | |
1166 | ap->ops->disable_pm(ap); | |
1167 | } | |
1992a5ed | 1168 | #endif /* CONFIG_PM */ |
ca77329f KCA |
1169 | |
1170 | void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy) | |
1171 | { | |
1172 | ap->pm_policy = policy; | |
3ec25ebd | 1173 | ap->link.eh_info.action |= ATA_EH_LPM; |
ca77329f KCA |
1174 | ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY; |
1175 | ata_port_schedule_eh(ap); | |
1176 | } | |
1177 | ||
1992a5ed | 1178 | #ifdef CONFIG_PM |
ca77329f KCA |
1179 | static void ata_lpm_enable(struct ata_host *host) |
1180 | { | |
1181 | struct ata_link *link; | |
1182 | struct ata_port *ap; | |
1183 | struct ata_device *dev; | |
1184 | int i; | |
1185 | ||
1186 | for (i = 0; i < host->n_ports; i++) { | |
1187 | ap = host->ports[i]; | |
1eca4365 TH |
1188 | ata_for_each_link(link, ap, EDGE) { |
1189 | ata_for_each_dev(dev, link, ALL) | |
ca77329f KCA |
1190 | ata_dev_disable_pm(dev); |
1191 | } | |
1192 | } | |
1193 | } | |
1194 | ||
1195 | static void ata_lpm_disable(struct ata_host *host) | |
1196 | { | |
1197 | int i; | |
1198 | ||
1199 | for (i = 0; i < host->n_ports; i++) { | |
1200 | struct ata_port *ap = host->ports[i]; | |
1201 | ata_lpm_schedule(ap, ap->pm_policy); | |
1202 | } | |
1203 | } | |
1992a5ed | 1204 | #endif /* CONFIG_PM */ |
ca77329f | 1205 | |
1da177e4 LT |
1206 | /** |
1207 | * ata_dev_classify - determine device type based on ATA-spec signature | |
1208 | * @tf: ATA taskfile register set for device to be identified | |
1209 | * | |
1210 | * Determine from taskfile register contents whether a device is | |
1211 | * ATA or ATAPI, as per "Signature and persistence" section | |
1212 | * of ATA/PI spec (volume 1, sect 5.14). | |
1213 | * | |
1214 | * LOCKING: | |
1215 | * None. | |
1216 | * | |
1217 | * RETURNS: | |
633273a3 TH |
1218 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or |
1219 | * %ATA_DEV_UNKNOWN the event of failure. | |
1da177e4 | 1220 | */ |
057ace5e | 1221 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
1222 | { |
1223 | /* Apple's open source Darwin code hints that some devices only | |
1224 | * put a proper signature into the LBA mid/high registers, | |
1225 | * So, we only check those. It's sufficient for uniqueness. | |
633273a3 TH |
1226 | * |
1227 | * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate | |
1228 | * signatures for ATA and ATAPI devices attached on SerialATA, | |
1229 | * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA | |
1230 | * spec has never mentioned about using different signatures | |
1231 | * for ATA/ATAPI devices. Then, Serial ATA II: Port | |
1232 | * Multiplier specification began to use 0x69/0x96 to identify | |
1233 | * port multpliers and 0x3c/0xc3 to identify SEMB device. | |
1234 | * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and | |
1235 | * 0x69/0x96 shortly and described them as reserved for | |
1236 | * SerialATA. | |
1237 | * | |
1238 | * We follow the current spec and consider that 0x69/0x96 | |
1239 | * identifies a port multiplier and 0x3c/0xc3 a SEMB device. | |
79b42bab TH |
1240 | * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports |
1241 | * SEMB signature. This is worked around in | |
1242 | * ata_dev_read_id(). | |
1da177e4 | 1243 | */ |
633273a3 | 1244 | if ((tf->lbam == 0) && (tf->lbah == 0)) { |
1da177e4 LT |
1245 | DPRINTK("found ATA device by sig\n"); |
1246 | return ATA_DEV_ATA; | |
1247 | } | |
1248 | ||
633273a3 | 1249 | if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { |
1da177e4 LT |
1250 | DPRINTK("found ATAPI device by sig\n"); |
1251 | return ATA_DEV_ATAPI; | |
1252 | } | |
1253 | ||
633273a3 TH |
1254 | if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { |
1255 | DPRINTK("found PMP device by sig\n"); | |
1256 | return ATA_DEV_PMP; | |
1257 | } | |
1258 | ||
1259 | if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { | |
79b42bab TH |
1260 | DPRINTK("found SEMB device by sig (could be ATA device)\n"); |
1261 | return ATA_DEV_SEMB; | |
633273a3 TH |
1262 | } |
1263 | ||
1da177e4 LT |
1264 | DPRINTK("unknown device\n"); |
1265 | return ATA_DEV_UNKNOWN; | |
1266 | } | |
1267 | ||
1da177e4 | 1268 | /** |
6a62a04d | 1269 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
1270 | * @id: IDENTIFY DEVICE results we will examine |
1271 | * @s: string into which data is output | |
1272 | * @ofs: offset into identify device page | |
1273 | * @len: length of string to return. must be an even number. | |
1274 | * | |
1275 | * The strings in the IDENTIFY DEVICE page are broken up into | |
1276 | * 16-bit chunks. Run through the string, and output each | |
1277 | * 8-bit chunk linearly, regardless of platform. | |
1278 | * | |
1279 | * LOCKING: | |
1280 | * caller. | |
1281 | */ | |
1282 | ||
6a62a04d TH |
1283 | void ata_id_string(const u16 *id, unsigned char *s, |
1284 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
1285 | { |
1286 | unsigned int c; | |
1287 | ||
963e4975 AC |
1288 | BUG_ON(len & 1); |
1289 | ||
1da177e4 LT |
1290 | while (len > 0) { |
1291 | c = id[ofs] >> 8; | |
1292 | *s = c; | |
1293 | s++; | |
1294 | ||
1295 | c = id[ofs] & 0xff; | |
1296 | *s = c; | |
1297 | s++; | |
1298 | ||
1299 | ofs++; | |
1300 | len -= 2; | |
1301 | } | |
1302 | } | |
1303 | ||
0e949ff3 | 1304 | /** |
6a62a04d | 1305 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
1306 | * @id: IDENTIFY DEVICE results we will examine |
1307 | * @s: string into which data is output | |
1308 | * @ofs: offset into identify device page | |
1309 | * @len: length of string to return. must be an odd number. | |
1310 | * | |
6a62a04d | 1311 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
1312 | * trims trailing spaces and terminates the resulting string with |
1313 | * null. @len must be actual maximum length (even number) + 1. | |
1314 | * | |
1315 | * LOCKING: | |
1316 | * caller. | |
1317 | */ | |
6a62a04d TH |
1318 | void ata_id_c_string(const u16 *id, unsigned char *s, |
1319 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
1320 | { |
1321 | unsigned char *p; | |
1322 | ||
6a62a04d | 1323 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
1324 | |
1325 | p = s + strnlen(s, len - 1); | |
1326 | while (p > s && p[-1] == ' ') | |
1327 | p--; | |
1328 | *p = '\0'; | |
1329 | } | |
0baab86b | 1330 | |
db6f8759 TH |
1331 | static u64 ata_id_n_sectors(const u16 *id) |
1332 | { | |
1333 | if (ata_id_has_lba(id)) { | |
1334 | if (ata_id_has_lba48(id)) | |
968e594a | 1335 | return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); |
db6f8759 | 1336 | else |
968e594a | 1337 | return ata_id_u32(id, ATA_ID_LBA_CAPACITY); |
db6f8759 TH |
1338 | } else { |
1339 | if (ata_id_current_chs_valid(id)) | |
968e594a RH |
1340 | return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] * |
1341 | id[ATA_ID_CUR_SECTORS]; | |
db6f8759 | 1342 | else |
968e594a RH |
1343 | return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] * |
1344 | id[ATA_ID_SECTORS]; | |
db6f8759 TH |
1345 | } |
1346 | } | |
1347 | ||
a5987e0a | 1348 | u64 ata_tf_to_lba48(const struct ata_taskfile *tf) |
1e999736 AC |
1349 | { |
1350 | u64 sectors = 0; | |
1351 | ||
1352 | sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; | |
1353 | sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; | |
ba14a9c2 | 1354 | sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24; |
1e999736 AC |
1355 | sectors |= (tf->lbah & 0xff) << 16; |
1356 | sectors |= (tf->lbam & 0xff) << 8; | |
1357 | sectors |= (tf->lbal & 0xff); | |
1358 | ||
a5987e0a | 1359 | return sectors; |
1e999736 AC |
1360 | } |
1361 | ||
a5987e0a | 1362 | u64 ata_tf_to_lba(const struct ata_taskfile *tf) |
1e999736 AC |
1363 | { |
1364 | u64 sectors = 0; | |
1365 | ||
1366 | sectors |= (tf->device & 0x0f) << 24; | |
1367 | sectors |= (tf->lbah & 0xff) << 16; | |
1368 | sectors |= (tf->lbam & 0xff) << 8; | |
1369 | sectors |= (tf->lbal & 0xff); | |
1370 | ||
a5987e0a | 1371 | return sectors; |
1e999736 AC |
1372 | } |
1373 | ||
1374 | /** | |
c728a914 TH |
1375 | * ata_read_native_max_address - Read native max address |
1376 | * @dev: target device | |
1377 | * @max_sectors: out parameter for the result native max address | |
1e999736 | 1378 | * |
c728a914 TH |
1379 | * Perform an LBA48 or LBA28 native size query upon the device in |
1380 | * question. | |
1e999736 | 1381 | * |
c728a914 TH |
1382 | * RETURNS: |
1383 | * 0 on success, -EACCES if command is aborted by the drive. | |
1384 | * -EIO on other errors. | |
1e999736 | 1385 | */ |
c728a914 | 1386 | static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) |
1e999736 | 1387 | { |
c728a914 | 1388 | unsigned int err_mask; |
1e999736 | 1389 | struct ata_taskfile tf; |
c728a914 | 1390 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
1391 | |
1392 | ata_tf_init(dev, &tf); | |
1393 | ||
c728a914 | 1394 | /* always clear all address registers */ |
1e999736 | 1395 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1e999736 | 1396 | |
c728a914 TH |
1397 | if (lba48) { |
1398 | tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; | |
1399 | tf.flags |= ATA_TFLAG_LBA48; | |
1400 | } else | |
1401 | tf.command = ATA_CMD_READ_NATIVE_MAX; | |
1e999736 | 1402 | |
1e999736 | 1403 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 TH |
1404 | tf.device |= ATA_LBA; |
1405 | ||
2b789108 | 1406 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
c728a914 TH |
1407 | if (err_mask) { |
1408 | ata_dev_printk(dev, KERN_WARNING, "failed to read native " | |
1409 | "max address (err_mask=0x%x)\n", err_mask); | |
1410 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
1411 | return -EACCES; | |
1412 | return -EIO; | |
1413 | } | |
1e999736 | 1414 | |
c728a914 | 1415 | if (lba48) |
a5987e0a | 1416 | *max_sectors = ata_tf_to_lba48(&tf) + 1; |
c728a914 | 1417 | else |
a5987e0a | 1418 | *max_sectors = ata_tf_to_lba(&tf) + 1; |
2dcb407e | 1419 | if (dev->horkage & ATA_HORKAGE_HPA_SIZE) |
93328e11 | 1420 | (*max_sectors)--; |
c728a914 | 1421 | return 0; |
1e999736 AC |
1422 | } |
1423 | ||
1424 | /** | |
c728a914 TH |
1425 | * ata_set_max_sectors - Set max sectors |
1426 | * @dev: target device | |
6b38d1d1 | 1427 | * @new_sectors: new max sectors value to set for the device |
1e999736 | 1428 | * |
c728a914 TH |
1429 | * Set max sectors of @dev to @new_sectors. |
1430 | * | |
1431 | * RETURNS: | |
1432 | * 0 on success, -EACCES if command is aborted or denied (due to | |
1433 | * previous non-volatile SET_MAX) by the drive. -EIO on other | |
1434 | * errors. | |
1e999736 | 1435 | */ |
05027adc | 1436 | static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) |
1e999736 | 1437 | { |
c728a914 | 1438 | unsigned int err_mask; |
1e999736 | 1439 | struct ata_taskfile tf; |
c728a914 | 1440 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
1441 | |
1442 | new_sectors--; | |
1443 | ||
1444 | ata_tf_init(dev, &tf); | |
1445 | ||
1e999736 | 1446 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
c728a914 TH |
1447 | |
1448 | if (lba48) { | |
1449 | tf.command = ATA_CMD_SET_MAX_EXT; | |
1450 | tf.flags |= ATA_TFLAG_LBA48; | |
1451 | ||
1452 | tf.hob_lbal = (new_sectors >> 24) & 0xff; | |
1453 | tf.hob_lbam = (new_sectors >> 32) & 0xff; | |
1454 | tf.hob_lbah = (new_sectors >> 40) & 0xff; | |
1e582ba4 | 1455 | } else { |
c728a914 TH |
1456 | tf.command = ATA_CMD_SET_MAX; |
1457 | ||
1e582ba4 TH |
1458 | tf.device |= (new_sectors >> 24) & 0xf; |
1459 | } | |
1460 | ||
1e999736 | 1461 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 | 1462 | tf.device |= ATA_LBA; |
1e999736 AC |
1463 | |
1464 | tf.lbal = (new_sectors >> 0) & 0xff; | |
1465 | tf.lbam = (new_sectors >> 8) & 0xff; | |
1466 | tf.lbah = (new_sectors >> 16) & 0xff; | |
1e999736 | 1467 | |
2b789108 | 1468 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
c728a914 TH |
1469 | if (err_mask) { |
1470 | ata_dev_printk(dev, KERN_WARNING, "failed to set " | |
1471 | "max address (err_mask=0x%x)\n", err_mask); | |
1472 | if (err_mask == AC_ERR_DEV && | |
1473 | (tf.feature & (ATA_ABORTED | ATA_IDNF))) | |
1474 | return -EACCES; | |
1475 | return -EIO; | |
1476 | } | |
1477 | ||
c728a914 | 1478 | return 0; |
1e999736 AC |
1479 | } |
1480 | ||
1481 | /** | |
1482 | * ata_hpa_resize - Resize a device with an HPA set | |
1483 | * @dev: Device to resize | |
1484 | * | |
1485 | * Read the size of an LBA28 or LBA48 disk with HPA features and resize | |
1486 | * it if required to the full size of the media. The caller must check | |
1487 | * the drive has the HPA feature set enabled. | |
05027adc TH |
1488 | * |
1489 | * RETURNS: | |
1490 | * 0 on success, -errno on failure. | |
1e999736 | 1491 | */ |
05027adc | 1492 | static int ata_hpa_resize(struct ata_device *dev) |
1e999736 | 1493 | { |
05027adc TH |
1494 | struct ata_eh_context *ehc = &dev->link->eh_context; |
1495 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; | |
1496 | u64 sectors = ata_id_n_sectors(dev->id); | |
1497 | u64 native_sectors; | |
c728a914 | 1498 | int rc; |
a617c09f | 1499 | |
05027adc TH |
1500 | /* do we need to do it? */ |
1501 | if (dev->class != ATA_DEV_ATA || | |
1502 | !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || | |
1503 | (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) | |
c728a914 | 1504 | return 0; |
1e999736 | 1505 | |
05027adc TH |
1506 | /* read native max address */ |
1507 | rc = ata_read_native_max_address(dev, &native_sectors); | |
1508 | if (rc) { | |
dda7aba1 TH |
1509 | /* If device aborted the command or HPA isn't going to |
1510 | * be unlocked, skip HPA resizing. | |
05027adc | 1511 | */ |
dda7aba1 | 1512 | if (rc == -EACCES || !ata_ignore_hpa) { |
05027adc | 1513 | ata_dev_printk(dev, KERN_WARNING, "HPA support seems " |
dda7aba1 | 1514 | "broken, skipping HPA handling\n"); |
05027adc TH |
1515 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; |
1516 | ||
1517 | /* we can continue if device aborted the command */ | |
1518 | if (rc == -EACCES) | |
1519 | rc = 0; | |
1e999736 | 1520 | } |
37301a55 | 1521 | |
05027adc TH |
1522 | return rc; |
1523 | } | |
5920dadf | 1524 | dev->n_native_sectors = native_sectors; |
05027adc TH |
1525 | |
1526 | /* nothing to do? */ | |
1527 | if (native_sectors <= sectors || !ata_ignore_hpa) { | |
1528 | if (!print_info || native_sectors == sectors) | |
1529 | return 0; | |
1530 | ||
1531 | if (native_sectors > sectors) | |
1532 | ata_dev_printk(dev, KERN_INFO, | |
1533 | "HPA detected: current %llu, native %llu\n", | |
1534 | (unsigned long long)sectors, | |
1535 | (unsigned long long)native_sectors); | |
1536 | else if (native_sectors < sectors) | |
1537 | ata_dev_printk(dev, KERN_WARNING, | |
1538 | "native sectors (%llu) is smaller than " | |
1539 | "sectors (%llu)\n", | |
1540 | (unsigned long long)native_sectors, | |
1541 | (unsigned long long)sectors); | |
1542 | return 0; | |
1543 | } | |
1544 | ||
1545 | /* let's unlock HPA */ | |
1546 | rc = ata_set_max_sectors(dev, native_sectors); | |
1547 | if (rc == -EACCES) { | |
1548 | /* if device aborted the command, skip HPA resizing */ | |
1549 | ata_dev_printk(dev, KERN_WARNING, "device aborted resize " | |
1550 | "(%llu -> %llu), skipping HPA handling\n", | |
1551 | (unsigned long long)sectors, | |
1552 | (unsigned long long)native_sectors); | |
1553 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; | |
1554 | return 0; | |
1555 | } else if (rc) | |
1556 | return rc; | |
1557 | ||
1558 | /* re-read IDENTIFY data */ | |
1559 | rc = ata_dev_reread_id(dev, 0); | |
1560 | if (rc) { | |
1561 | ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY " | |
1562 | "data after HPA resizing\n"); | |
1563 | return rc; | |
1564 | } | |
1565 | ||
1566 | if (print_info) { | |
1567 | u64 new_sectors = ata_id_n_sectors(dev->id); | |
1568 | ata_dev_printk(dev, KERN_INFO, | |
1569 | "HPA unlocked: %llu -> %llu, native %llu\n", | |
1570 | (unsigned long long)sectors, | |
1571 | (unsigned long long)new_sectors, | |
1572 | (unsigned long long)native_sectors); | |
1573 | } | |
1574 | ||
1575 | return 0; | |
1e999736 AC |
1576 | } |
1577 | ||
1da177e4 LT |
1578 | /** |
1579 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 1580 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 1581 | * |
0bd3300a TH |
1582 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
1583 | * page. | |
1da177e4 LT |
1584 | * |
1585 | * LOCKING: | |
1586 | * caller. | |
1587 | */ | |
1588 | ||
0bd3300a | 1589 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
1590 | { |
1591 | DPRINTK("49==0x%04x " | |
1592 | "53==0x%04x " | |
1593 | "63==0x%04x " | |
1594 | "64==0x%04x " | |
1595 | "75==0x%04x \n", | |
0bd3300a TH |
1596 | id[49], |
1597 | id[53], | |
1598 | id[63], | |
1599 | id[64], | |
1600 | id[75]); | |
1da177e4 LT |
1601 | DPRINTK("80==0x%04x " |
1602 | "81==0x%04x " | |
1603 | "82==0x%04x " | |
1604 | "83==0x%04x " | |
1605 | "84==0x%04x \n", | |
0bd3300a TH |
1606 | id[80], |
1607 | id[81], | |
1608 | id[82], | |
1609 | id[83], | |
1610 | id[84]); | |
1da177e4 LT |
1611 | DPRINTK("88==0x%04x " |
1612 | "93==0x%04x\n", | |
0bd3300a TH |
1613 | id[88], |
1614 | id[93]); | |
1da177e4 LT |
1615 | } |
1616 | ||
cb95d562 TH |
1617 | /** |
1618 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
1619 | * @id: IDENTIFY data to compute xfer mask from | |
1620 | * | |
1621 | * Compute the xfermask for this device. This is not as trivial | |
1622 | * as it seems if we must consider early devices correctly. | |
1623 | * | |
1624 | * FIXME: pre IDE drive timing (do we care ?). | |
1625 | * | |
1626 | * LOCKING: | |
1627 | * None. | |
1628 | * | |
1629 | * RETURNS: | |
1630 | * Computed xfermask | |
1631 | */ | |
7dc951ae | 1632 | unsigned long ata_id_xfermask(const u16 *id) |
cb95d562 | 1633 | { |
7dc951ae | 1634 | unsigned long pio_mask, mwdma_mask, udma_mask; |
cb95d562 TH |
1635 | |
1636 | /* Usual case. Word 53 indicates word 64 is valid */ | |
1637 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
1638 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
1639 | pio_mask <<= 3; | |
1640 | pio_mask |= 0x7; | |
1641 | } else { | |
1642 | /* If word 64 isn't valid then Word 51 high byte holds | |
1643 | * the PIO timing number for the maximum. Turn it into | |
1644 | * a mask. | |
1645 | */ | |
7a0f1c8a | 1646 | u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
46767aeb | 1647 | if (mode < 5) /* Valid PIO range */ |
2dcb407e | 1648 | pio_mask = (2 << mode) - 1; |
46767aeb AC |
1649 | else |
1650 | pio_mask = 1; | |
cb95d562 TH |
1651 | |
1652 | /* But wait.. there's more. Design your standards by | |
1653 | * committee and you too can get a free iordy field to | |
1654 | * process. However its the speeds not the modes that | |
1655 | * are supported... Note drivers using the timing API | |
1656 | * will get this right anyway | |
1657 | */ | |
1658 | } | |
1659 | ||
1660 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
fb21f0d0 | 1661 | |
b352e57d AC |
1662 | if (ata_id_is_cfa(id)) { |
1663 | /* | |
1664 | * Process compact flash extended modes | |
1665 | */ | |
62afe5d7 SS |
1666 | int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7; |
1667 | int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7; | |
b352e57d AC |
1668 | |
1669 | if (pio) | |
1670 | pio_mask |= (1 << 5); | |
1671 | if (pio > 1) | |
1672 | pio_mask |= (1 << 6); | |
1673 | if (dma) | |
1674 | mwdma_mask |= (1 << 3); | |
1675 | if (dma > 1) | |
1676 | mwdma_mask |= (1 << 4); | |
1677 | } | |
1678 | ||
fb21f0d0 TH |
1679 | udma_mask = 0; |
1680 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
1681 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
cb95d562 TH |
1682 | |
1683 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
1684 | } | |
1685 | ||
86e45b6b | 1686 | /** |
442eacc3 | 1687 | * ata_pio_queue_task - Queue port_task |
86e45b6b | 1688 | * @ap: The ata_port to queue port_task for |
65f27f38 | 1689 | * @data: data for @fn to use |
341c2c95 | 1690 | * @delay: delay time in msecs for workqueue function |
86e45b6b TH |
1691 | * |
1692 | * Schedule @fn(@data) for execution after @delay jiffies using | |
1693 | * port_task. There is one port_task per port and it's the | |
1694 | * user(low level driver)'s responsibility to make sure that only | |
1695 | * one task is active at any given time. | |
1696 | * | |
1697 | * libata core layer takes care of synchronization between | |
442eacc3 | 1698 | * port_task and EH. ata_pio_queue_task() may be ignored for EH |
86e45b6b TH |
1699 | * synchronization. |
1700 | * | |
1701 | * LOCKING: | |
1702 | * Inherited from caller. | |
1703 | */ | |
624d5c51 | 1704 | void ata_pio_queue_task(struct ata_port *ap, void *data, unsigned long delay) |
86e45b6b | 1705 | { |
65f27f38 | 1706 | ap->port_task_data = data; |
86e45b6b | 1707 | |
45a66c1c | 1708 | /* may fail if ata_port_flush_task() in progress */ |
341c2c95 | 1709 | queue_delayed_work(ata_wq, &ap->port_task, msecs_to_jiffies(delay)); |
86e45b6b TH |
1710 | } |
1711 | ||
1712 | /** | |
1713 | * ata_port_flush_task - Flush port_task | |
1714 | * @ap: The ata_port to flush port_task for | |
1715 | * | |
1716 | * After this function completes, port_task is guranteed not to | |
1717 | * be running or scheduled. | |
1718 | * | |
1719 | * LOCKING: | |
1720 | * Kernel thread context (may sleep) | |
1721 | */ | |
1722 | void ata_port_flush_task(struct ata_port *ap) | |
1723 | { | |
86e45b6b TH |
1724 | DPRINTK("ENTER\n"); |
1725 | ||
45a66c1c | 1726 | cancel_rearming_delayed_work(&ap->port_task); |
86e45b6b | 1727 | |
0dd4b21f | 1728 | if (ata_msg_ctl(ap)) |
7f5e4e8d | 1729 | ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __func__); |
86e45b6b TH |
1730 | } |
1731 | ||
7102d230 | 1732 | static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 1733 | { |
77853bf2 | 1734 | struct completion *waiting = qc->private_data; |
a2a7a662 | 1735 | |
a2a7a662 | 1736 | complete(waiting); |
a2a7a662 TH |
1737 | } |
1738 | ||
1739 | /** | |
2432697b | 1740 | * ata_exec_internal_sg - execute libata internal command |
a2a7a662 TH |
1741 | * @dev: Device to which the command is sent |
1742 | * @tf: Taskfile registers for the command and the result | |
d69cf37d | 1743 | * @cdb: CDB for packet command |
a2a7a662 | 1744 | * @dma_dir: Data tranfer direction of the command |
5c1ad8b3 | 1745 | * @sgl: sg list for the data buffer of the command |
2432697b | 1746 | * @n_elem: Number of sg entries |
2b789108 | 1747 | * @timeout: Timeout in msecs (0 for default) |
a2a7a662 TH |
1748 | * |
1749 | * Executes libata internal command with timeout. @tf contains | |
1750 | * command on entry and result on return. Timeout and error | |
1751 | * conditions are reported via return value. No recovery action | |
1752 | * is taken after a command times out. It's caller's duty to | |
1753 | * clean up after timeout. | |
1754 | * | |
1755 | * LOCKING: | |
1756 | * None. Should be called with kernel context, might sleep. | |
551e8889 TH |
1757 | * |
1758 | * RETURNS: | |
1759 | * Zero on success, AC_ERR_* mask on failure | |
a2a7a662 | 1760 | */ |
2432697b TH |
1761 | unsigned ata_exec_internal_sg(struct ata_device *dev, |
1762 | struct ata_taskfile *tf, const u8 *cdb, | |
87260216 | 1763 | int dma_dir, struct scatterlist *sgl, |
2b789108 | 1764 | unsigned int n_elem, unsigned long timeout) |
a2a7a662 | 1765 | { |
9af5c9c9 TH |
1766 | struct ata_link *link = dev->link; |
1767 | struct ata_port *ap = link->ap; | |
a2a7a662 | 1768 | u8 command = tf->command; |
87fbc5a0 | 1769 | int auto_timeout = 0; |
a2a7a662 | 1770 | struct ata_queued_cmd *qc; |
2ab7db1f | 1771 | unsigned int tag, preempted_tag; |
dedaf2b0 | 1772 | u32 preempted_sactive, preempted_qc_active; |
da917d69 | 1773 | int preempted_nr_active_links; |
60be6b9a | 1774 | DECLARE_COMPLETION_ONSTACK(wait); |
a2a7a662 | 1775 | unsigned long flags; |
77853bf2 | 1776 | unsigned int err_mask; |
d95a717f | 1777 | int rc; |
a2a7a662 | 1778 | |
ba6a1308 | 1779 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 | 1780 | |
e3180499 | 1781 | /* no internal command while frozen */ |
b51e9e5d | 1782 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
ba6a1308 | 1783 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1784 | return AC_ERR_SYSTEM; |
1785 | } | |
1786 | ||
2ab7db1f | 1787 | /* initialize internal qc */ |
a2a7a662 | 1788 | |
2ab7db1f TH |
1789 | /* XXX: Tag 0 is used for drivers with legacy EH as some |
1790 | * drivers choke if any other tag is given. This breaks | |
1791 | * ata_tag_internal() test for those drivers. Don't use new | |
1792 | * EH stuff without converting to it. | |
1793 | */ | |
1794 | if (ap->ops->error_handler) | |
1795 | tag = ATA_TAG_INTERNAL; | |
1796 | else | |
1797 | tag = 0; | |
1798 | ||
8a8bc223 TH |
1799 | if (test_and_set_bit(tag, &ap->qc_allocated)) |
1800 | BUG(); | |
f69499f4 | 1801 | qc = __ata_qc_from_tag(ap, tag); |
2ab7db1f TH |
1802 | |
1803 | qc->tag = tag; | |
1804 | qc->scsicmd = NULL; | |
1805 | qc->ap = ap; | |
1806 | qc->dev = dev; | |
1807 | ata_qc_reinit(qc); | |
1808 | ||
9af5c9c9 TH |
1809 | preempted_tag = link->active_tag; |
1810 | preempted_sactive = link->sactive; | |
dedaf2b0 | 1811 | preempted_qc_active = ap->qc_active; |
da917d69 | 1812 | preempted_nr_active_links = ap->nr_active_links; |
9af5c9c9 TH |
1813 | link->active_tag = ATA_TAG_POISON; |
1814 | link->sactive = 0; | |
dedaf2b0 | 1815 | ap->qc_active = 0; |
da917d69 | 1816 | ap->nr_active_links = 0; |
2ab7db1f TH |
1817 | |
1818 | /* prepare & issue qc */ | |
a2a7a662 | 1819 | qc->tf = *tf; |
d69cf37d TH |
1820 | if (cdb) |
1821 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); | |
e61e0672 | 1822 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
a2a7a662 TH |
1823 | qc->dma_dir = dma_dir; |
1824 | if (dma_dir != DMA_NONE) { | |
2432697b | 1825 | unsigned int i, buflen = 0; |
87260216 | 1826 | struct scatterlist *sg; |
2432697b | 1827 | |
87260216 JA |
1828 | for_each_sg(sgl, sg, n_elem, i) |
1829 | buflen += sg->length; | |
2432697b | 1830 | |
87260216 | 1831 | ata_sg_init(qc, sgl, n_elem); |
49c80429 | 1832 | qc->nbytes = buflen; |
a2a7a662 TH |
1833 | } |
1834 | ||
77853bf2 | 1835 | qc->private_data = &wait; |
a2a7a662 TH |
1836 | qc->complete_fn = ata_qc_complete_internal; |
1837 | ||
8e0e694a | 1838 | ata_qc_issue(qc); |
a2a7a662 | 1839 | |
ba6a1308 | 1840 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 | 1841 | |
87fbc5a0 TH |
1842 | if (!timeout) { |
1843 | if (ata_probe_timeout) | |
1844 | timeout = ata_probe_timeout * 1000; | |
1845 | else { | |
1846 | timeout = ata_internal_cmd_timeout(dev, command); | |
1847 | auto_timeout = 1; | |
1848 | } | |
1849 | } | |
2b789108 TH |
1850 | |
1851 | rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); | |
d95a717f TH |
1852 | |
1853 | ata_port_flush_task(ap); | |
41ade50c | 1854 | |
d95a717f | 1855 | if (!rc) { |
ba6a1308 | 1856 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 TH |
1857 | |
1858 | /* We're racing with irq here. If we lose, the | |
1859 | * following test prevents us from completing the qc | |
d95a717f TH |
1860 | * twice. If we win, the port is frozen and will be |
1861 | * cleaned up by ->post_internal_cmd(). | |
a2a7a662 | 1862 | */ |
77853bf2 | 1863 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
d95a717f TH |
1864 | qc->err_mask |= AC_ERR_TIMEOUT; |
1865 | ||
1866 | if (ap->ops->error_handler) | |
1867 | ata_port_freeze(ap); | |
1868 | else | |
1869 | ata_qc_complete(qc); | |
f15a1daf | 1870 | |
0dd4b21f BP |
1871 | if (ata_msg_warn(ap)) |
1872 | ata_dev_printk(dev, KERN_WARNING, | |
88574551 | 1873 | "qc timeout (cmd 0x%x)\n", command); |
a2a7a662 TH |
1874 | } |
1875 | ||
ba6a1308 | 1876 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 TH |
1877 | } |
1878 | ||
d95a717f TH |
1879 | /* do post_internal_cmd */ |
1880 | if (ap->ops->post_internal_cmd) | |
1881 | ap->ops->post_internal_cmd(qc); | |
1882 | ||
a51d644a TH |
1883 | /* perform minimal error analysis */ |
1884 | if (qc->flags & ATA_QCFLAG_FAILED) { | |
1885 | if (qc->result_tf.command & (ATA_ERR | ATA_DF)) | |
1886 | qc->err_mask |= AC_ERR_DEV; | |
1887 | ||
1888 | if (!qc->err_mask) | |
1889 | qc->err_mask |= AC_ERR_OTHER; | |
1890 | ||
1891 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1892 | qc->err_mask &= ~AC_ERR_OTHER; | |
d95a717f TH |
1893 | } |
1894 | ||
15869303 | 1895 | /* finish up */ |
ba6a1308 | 1896 | spin_lock_irqsave(ap->lock, flags); |
15869303 | 1897 | |
e61e0672 | 1898 | *tf = qc->result_tf; |
77853bf2 TH |
1899 | err_mask = qc->err_mask; |
1900 | ||
1901 | ata_qc_free(qc); | |
9af5c9c9 TH |
1902 | link->active_tag = preempted_tag; |
1903 | link->sactive = preempted_sactive; | |
dedaf2b0 | 1904 | ap->qc_active = preempted_qc_active; |
da917d69 | 1905 | ap->nr_active_links = preempted_nr_active_links; |
77853bf2 | 1906 | |
1f7dd3e9 TH |
1907 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
1908 | * Until those drivers are fixed, we detect the condition | |
1909 | * here, fail the command with AC_ERR_SYSTEM and reenable the | |
1910 | * port. | |
1911 | * | |
1912 | * Note that this doesn't change any behavior as internal | |
1913 | * command failure results in disabling the device in the | |
1914 | * higher layer for LLDDs without new reset/EH callbacks. | |
1915 | * | |
1916 | * Kill the following code as soon as those drivers are fixed. | |
1917 | */ | |
198e0fed | 1918 | if (ap->flags & ATA_FLAG_DISABLED) { |
1f7dd3e9 TH |
1919 | err_mask |= AC_ERR_SYSTEM; |
1920 | ata_port_probe(ap); | |
1921 | } | |
1922 | ||
ba6a1308 | 1923 | spin_unlock_irqrestore(ap->lock, flags); |
15869303 | 1924 | |
87fbc5a0 TH |
1925 | if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout) |
1926 | ata_internal_cmd_timed_out(dev, command); | |
1927 | ||
77853bf2 | 1928 | return err_mask; |
a2a7a662 TH |
1929 | } |
1930 | ||
2432697b | 1931 | /** |
33480a0e | 1932 | * ata_exec_internal - execute libata internal command |
2432697b TH |
1933 | * @dev: Device to which the command is sent |
1934 | * @tf: Taskfile registers for the command and the result | |
1935 | * @cdb: CDB for packet command | |
1936 | * @dma_dir: Data tranfer direction of the command | |
1937 | * @buf: Data buffer of the command | |
1938 | * @buflen: Length of data buffer | |
2b789108 | 1939 | * @timeout: Timeout in msecs (0 for default) |
2432697b TH |
1940 | * |
1941 | * Wrapper around ata_exec_internal_sg() which takes simple | |
1942 | * buffer instead of sg list. | |
1943 | * | |
1944 | * LOCKING: | |
1945 | * None. Should be called with kernel context, might sleep. | |
1946 | * | |
1947 | * RETURNS: | |
1948 | * Zero on success, AC_ERR_* mask on failure | |
1949 | */ | |
1950 | unsigned ata_exec_internal(struct ata_device *dev, | |
1951 | struct ata_taskfile *tf, const u8 *cdb, | |
2b789108 TH |
1952 | int dma_dir, void *buf, unsigned int buflen, |
1953 | unsigned long timeout) | |
2432697b | 1954 | { |
33480a0e TH |
1955 | struct scatterlist *psg = NULL, sg; |
1956 | unsigned int n_elem = 0; | |
2432697b | 1957 | |
33480a0e TH |
1958 | if (dma_dir != DMA_NONE) { |
1959 | WARN_ON(!buf); | |
1960 | sg_init_one(&sg, buf, buflen); | |
1961 | psg = &sg; | |
1962 | n_elem++; | |
1963 | } | |
2432697b | 1964 | |
2b789108 TH |
1965 | return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, |
1966 | timeout); | |
2432697b TH |
1967 | } |
1968 | ||
977e6b9f TH |
1969 | /** |
1970 | * ata_do_simple_cmd - execute simple internal command | |
1971 | * @dev: Device to which the command is sent | |
1972 | * @cmd: Opcode to execute | |
1973 | * | |
1974 | * Execute a 'simple' command, that only consists of the opcode | |
1975 | * 'cmd' itself, without filling any other registers | |
1976 | * | |
1977 | * LOCKING: | |
1978 | * Kernel thread context (may sleep). | |
1979 | * | |
1980 | * RETURNS: | |
1981 | * Zero on success, AC_ERR_* mask on failure | |
e58eb583 | 1982 | */ |
77b08fb5 | 1983 | unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
e58eb583 TH |
1984 | { |
1985 | struct ata_taskfile tf; | |
e58eb583 TH |
1986 | |
1987 | ata_tf_init(dev, &tf); | |
1988 | ||
1989 | tf.command = cmd; | |
1990 | tf.flags |= ATA_TFLAG_DEVICE; | |
1991 | tf.protocol = ATA_PROT_NODATA; | |
1992 | ||
2b789108 | 1993 | return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
e58eb583 TH |
1994 | } |
1995 | ||
1bc4ccff AC |
1996 | /** |
1997 | * ata_pio_need_iordy - check if iordy needed | |
1998 | * @adev: ATA device | |
1999 | * | |
2000 | * Check if the current speed of the device requires IORDY. Used | |
2001 | * by various controllers for chip configuration. | |
2002 | */ | |
1bc4ccff AC |
2003 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
2004 | { | |
0d9e6659 TH |
2005 | /* Don't set IORDY if we're preparing for reset. IORDY may |
2006 | * lead to controller lock up on certain controllers if the | |
2007 | * port is not occupied. See bko#11703 for details. | |
2008 | */ | |
2009 | if (adev->link->ap->pflags & ATA_PFLAG_RESETTING) | |
2010 | return 0; | |
2011 | /* Controller doesn't support IORDY. Probably a pointless | |
2012 | * check as the caller should know this. | |
2013 | */ | |
9af5c9c9 | 2014 | if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) |
1bc4ccff | 2015 | return 0; |
5c18c4d2 DD |
2016 | /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */ |
2017 | if (ata_id_is_cfa(adev->id) | |
2018 | && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6)) | |
2019 | return 0; | |
432729f0 AC |
2020 | /* PIO3 and higher it is mandatory */ |
2021 | if (adev->pio_mode > XFER_PIO_2) | |
2022 | return 1; | |
2023 | /* We turn it on when possible */ | |
2024 | if (ata_id_has_iordy(adev->id)) | |
1bc4ccff | 2025 | return 1; |
432729f0 AC |
2026 | return 0; |
2027 | } | |
2e9edbf8 | 2028 | |
432729f0 AC |
2029 | /** |
2030 | * ata_pio_mask_no_iordy - Return the non IORDY mask | |
2031 | * @adev: ATA device | |
2032 | * | |
2033 | * Compute the highest mode possible if we are not using iordy. Return | |
2034 | * -1 if no iordy mode is available. | |
2035 | */ | |
432729f0 AC |
2036 | static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) |
2037 | { | |
1bc4ccff | 2038 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
1bc4ccff | 2039 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
432729f0 | 2040 | u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
1bc4ccff AC |
2041 | /* Is the speed faster than the drive allows non IORDY ? */ |
2042 | if (pio) { | |
2043 | /* This is cycle times not frequency - watch the logic! */ | |
2044 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
432729f0 AC |
2045 | return 3 << ATA_SHIFT_PIO; |
2046 | return 7 << ATA_SHIFT_PIO; | |
1bc4ccff AC |
2047 | } |
2048 | } | |
432729f0 | 2049 | return 3 << ATA_SHIFT_PIO; |
1bc4ccff AC |
2050 | } |
2051 | ||
963e4975 AC |
2052 | /** |
2053 | * ata_do_dev_read_id - default ID read method | |
2054 | * @dev: device | |
2055 | * @tf: proposed taskfile | |
2056 | * @id: data buffer | |
2057 | * | |
2058 | * Issue the identify taskfile and hand back the buffer containing | |
2059 | * identify data. For some RAID controllers and for pre ATA devices | |
2060 | * this function is wrapped or replaced by the driver | |
2061 | */ | |
2062 | unsigned int ata_do_dev_read_id(struct ata_device *dev, | |
2063 | struct ata_taskfile *tf, u16 *id) | |
2064 | { | |
2065 | return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE, | |
2066 | id, sizeof(id[0]) * ATA_ID_WORDS, 0); | |
2067 | } | |
2068 | ||
1da177e4 | 2069 | /** |
49016aca | 2070 | * ata_dev_read_id - Read ID data from the specified device |
49016aca TH |
2071 | * @dev: target device |
2072 | * @p_class: pointer to class of the target device (may be changed) | |
bff04647 | 2073 | * @flags: ATA_READID_* flags |
fe635c7e | 2074 | * @id: buffer to read IDENTIFY data into |
1da177e4 | 2075 | * |
49016aca TH |
2076 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
2077 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
aec5c3c1 TH |
2078 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
2079 | * for pre-ATA4 drives. | |
1da177e4 | 2080 | * |
50a99018 | 2081 | * FIXME: ATA_CMD_ID_ATA is optional for early drives and right |
2dcb407e | 2082 | * now we abort if we hit that case. |
50a99018 | 2083 | * |
1da177e4 | 2084 | * LOCKING: |
49016aca TH |
2085 | * Kernel thread context (may sleep) |
2086 | * | |
2087 | * RETURNS: | |
2088 | * 0 on success, -errno otherwise. | |
1da177e4 | 2089 | */ |
a9beec95 | 2090 | int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, |
bff04647 | 2091 | unsigned int flags, u16 *id) |
1da177e4 | 2092 | { |
9af5c9c9 | 2093 | struct ata_port *ap = dev->link->ap; |
49016aca | 2094 | unsigned int class = *p_class; |
a0123703 | 2095 | struct ata_taskfile tf; |
49016aca TH |
2096 | unsigned int err_mask = 0; |
2097 | const char *reason; | |
79b42bab | 2098 | bool is_semb = class == ATA_DEV_SEMB; |
54936f8b | 2099 | int may_fallback = 1, tried_spinup = 0; |
49016aca | 2100 | int rc; |
1da177e4 | 2101 | |
0dd4b21f | 2102 | if (ata_msg_ctl(ap)) |
7f5e4e8d | 2103 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); |
1da177e4 | 2104 | |
963e4975 | 2105 | retry: |
3373efd8 | 2106 | ata_tf_init(dev, &tf); |
a0123703 | 2107 | |
49016aca | 2108 | switch (class) { |
79b42bab TH |
2109 | case ATA_DEV_SEMB: |
2110 | class = ATA_DEV_ATA; /* some hard drives report SEMB sig */ | |
49016aca | 2111 | case ATA_DEV_ATA: |
a0123703 | 2112 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
2113 | break; |
2114 | case ATA_DEV_ATAPI: | |
a0123703 | 2115 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
2116 | break; |
2117 | default: | |
2118 | rc = -ENODEV; | |
2119 | reason = "unsupported class"; | |
2120 | goto err_out; | |
1da177e4 LT |
2121 | } |
2122 | ||
a0123703 | 2123 | tf.protocol = ATA_PROT_PIO; |
81afe893 TH |
2124 | |
2125 | /* Some devices choke if TF registers contain garbage. Make | |
2126 | * sure those are properly initialized. | |
2127 | */ | |
2128 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2129 | ||
2130 | /* Device presence detection is unreliable on some | |
2131 | * controllers. Always poll IDENTIFY if available. | |
2132 | */ | |
2133 | tf.flags |= ATA_TFLAG_POLLING; | |
1da177e4 | 2134 | |
963e4975 AC |
2135 | if (ap->ops->read_id) |
2136 | err_mask = ap->ops->read_id(dev, &tf, id); | |
2137 | else | |
2138 | err_mask = ata_do_dev_read_id(dev, &tf, id); | |
2139 | ||
a0123703 | 2140 | if (err_mask) { |
800b3996 | 2141 | if (err_mask & AC_ERR_NODEV_HINT) { |
1ffc151f TH |
2142 | ata_dev_printk(dev, KERN_DEBUG, |
2143 | "NODEV after polling detection\n"); | |
55a8e2c8 TH |
2144 | return -ENOENT; |
2145 | } | |
2146 | ||
79b42bab TH |
2147 | if (is_semb) { |
2148 | ata_dev_printk(dev, KERN_INFO, "IDENTIFY failed on " | |
2149 | "device w/ SEMB sig, disabled\n"); | |
2150 | /* SEMB is not supported yet */ | |
2151 | *p_class = ATA_DEV_SEMB_UNSUP; | |
2152 | return 0; | |
2153 | } | |
2154 | ||
1ffc151f TH |
2155 | if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { |
2156 | /* Device or controller might have reported | |
2157 | * the wrong device class. Give a shot at the | |
2158 | * other IDENTIFY if the current one is | |
2159 | * aborted by the device. | |
2160 | */ | |
2161 | if (may_fallback) { | |
2162 | may_fallback = 0; | |
2163 | ||
2164 | if (class == ATA_DEV_ATA) | |
2165 | class = ATA_DEV_ATAPI; | |
2166 | else | |
2167 | class = ATA_DEV_ATA; | |
2168 | goto retry; | |
2169 | } | |
2170 | ||
2171 | /* Control reaches here iff the device aborted | |
2172 | * both flavors of IDENTIFYs which happens | |
2173 | * sometimes with phantom devices. | |
2174 | */ | |
2175 | ata_dev_printk(dev, KERN_DEBUG, | |
2176 | "both IDENTIFYs aborted, assuming NODEV\n"); | |
2177 | return -ENOENT; | |
54936f8b TH |
2178 | } |
2179 | ||
49016aca TH |
2180 | rc = -EIO; |
2181 | reason = "I/O error"; | |
1da177e4 LT |
2182 | goto err_out; |
2183 | } | |
2184 | ||
54936f8b TH |
2185 | /* Falling back doesn't make sense if ID data was read |
2186 | * successfully at least once. | |
2187 | */ | |
2188 | may_fallback = 0; | |
2189 | ||
49016aca | 2190 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 | 2191 | |
49016aca | 2192 | /* sanity check */ |
a4f5749b | 2193 | rc = -EINVAL; |
6070068b | 2194 | reason = "device reports invalid type"; |
a4f5749b TH |
2195 | |
2196 | if (class == ATA_DEV_ATA) { | |
2197 | if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) | |
2198 | goto err_out; | |
2199 | } else { | |
2200 | if (ata_id_is_ata(id)) | |
2201 | goto err_out; | |
49016aca TH |
2202 | } |
2203 | ||
169439c2 ML |
2204 | if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { |
2205 | tried_spinup = 1; | |
2206 | /* | |
2207 | * Drive powered-up in standby mode, and requires a specific | |
2208 | * SET_FEATURES spin-up subcommand before it will accept | |
2209 | * anything other than the original IDENTIFY command. | |
2210 | */ | |
218f3d30 | 2211 | err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); |
fb0582f9 | 2212 | if (err_mask && id[2] != 0x738c) { |
169439c2 ML |
2213 | rc = -EIO; |
2214 | reason = "SPINUP failed"; | |
2215 | goto err_out; | |
2216 | } | |
2217 | /* | |
2218 | * If the drive initially returned incomplete IDENTIFY info, | |
2219 | * we now must reissue the IDENTIFY command. | |
2220 | */ | |
2221 | if (id[2] == 0x37c8) | |
2222 | goto retry; | |
2223 | } | |
2224 | ||
bff04647 | 2225 | if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { |
49016aca TH |
2226 | /* |
2227 | * The exact sequence expected by certain pre-ATA4 drives is: | |
2228 | * SRST RESET | |
50a99018 AC |
2229 | * IDENTIFY (optional in early ATA) |
2230 | * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) | |
49016aca TH |
2231 | * anything else.. |
2232 | * Some drives were very specific about that exact sequence. | |
50a99018 AC |
2233 | * |
2234 | * Note that ATA4 says lba is mandatory so the second check | |
2235 | * shoud never trigger. | |
49016aca TH |
2236 | */ |
2237 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
3373efd8 | 2238 | err_mask = ata_dev_init_params(dev, id[3], id[6]); |
49016aca TH |
2239 | if (err_mask) { |
2240 | rc = -EIO; | |
2241 | reason = "INIT_DEV_PARAMS failed"; | |
2242 | goto err_out; | |
2243 | } | |
2244 | ||
2245 | /* current CHS translation info (id[53-58]) might be | |
2246 | * changed. reread the identify device info. | |
2247 | */ | |
bff04647 | 2248 | flags &= ~ATA_READID_POSTRESET; |
49016aca TH |
2249 | goto retry; |
2250 | } | |
2251 | } | |
2252 | ||
2253 | *p_class = class; | |
fe635c7e | 2254 | |
49016aca TH |
2255 | return 0; |
2256 | ||
2257 | err_out: | |
88574551 | 2258 | if (ata_msg_warn(ap)) |
0dd4b21f | 2259 | ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
88574551 | 2260 | "(%s, err_mask=0x%x)\n", reason, err_mask); |
49016aca TH |
2261 | return rc; |
2262 | } | |
2263 | ||
9062712f TH |
2264 | static int ata_do_link_spd_horkage(struct ata_device *dev) |
2265 | { | |
2266 | struct ata_link *plink = ata_dev_phys_link(dev); | |
2267 | u32 target, target_limit; | |
2268 | ||
2269 | if (!sata_scr_valid(plink)) | |
2270 | return 0; | |
2271 | ||
2272 | if (dev->horkage & ATA_HORKAGE_1_5_GBPS) | |
2273 | target = 1; | |
2274 | else | |
2275 | return 0; | |
2276 | ||
2277 | target_limit = (1 << target) - 1; | |
2278 | ||
2279 | /* if already on stricter limit, no need to push further */ | |
2280 | if (plink->sata_spd_limit <= target_limit) | |
2281 | return 0; | |
2282 | ||
2283 | plink->sata_spd_limit = target_limit; | |
2284 | ||
2285 | /* Request another EH round by returning -EAGAIN if link is | |
2286 | * going faster than the target speed. Forward progress is | |
2287 | * guaranteed by setting sata_spd_limit to target_limit above. | |
2288 | */ | |
2289 | if (plink->sata_spd > target) { | |
2290 | ata_dev_printk(dev, KERN_INFO, | |
2291 | "applying link speed limit horkage to %s\n", | |
2292 | sata_spd_string(target)); | |
2293 | return -EAGAIN; | |
2294 | } | |
2295 | return 0; | |
2296 | } | |
2297 | ||
3373efd8 | 2298 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
4b2f3ede | 2299 | { |
9af5c9c9 | 2300 | struct ata_port *ap = dev->link->ap; |
9ce8e307 JA |
2301 | |
2302 | if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK) | |
2303 | return 0; | |
2304 | ||
9af5c9c9 | 2305 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); |
4b2f3ede TH |
2306 | } |
2307 | ||
388539f3 | 2308 | static int ata_dev_config_ncq(struct ata_device *dev, |
a6e6ce8e TH |
2309 | char *desc, size_t desc_sz) |
2310 | { | |
9af5c9c9 | 2311 | struct ata_port *ap = dev->link->ap; |
a6e6ce8e | 2312 | int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); |
388539f3 SL |
2313 | unsigned int err_mask; |
2314 | char *aa_desc = ""; | |
a6e6ce8e TH |
2315 | |
2316 | if (!ata_id_has_ncq(dev->id)) { | |
2317 | desc[0] = '\0'; | |
388539f3 | 2318 | return 0; |
a6e6ce8e | 2319 | } |
75683fe7 | 2320 | if (dev->horkage & ATA_HORKAGE_NONCQ) { |
6919a0a6 | 2321 | snprintf(desc, desc_sz, "NCQ (not used)"); |
388539f3 | 2322 | return 0; |
6919a0a6 | 2323 | } |
a6e6ce8e | 2324 | if (ap->flags & ATA_FLAG_NCQ) { |
cca3974e | 2325 | hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
a6e6ce8e TH |
2326 | dev->flags |= ATA_DFLAG_NCQ; |
2327 | } | |
2328 | ||
388539f3 SL |
2329 | if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) && |
2330 | (ap->flags & ATA_FLAG_FPDMA_AA) && | |
2331 | ata_id_has_fpdma_aa(dev->id)) { | |
2332 | err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE, | |
2333 | SATA_FPDMA_AA); | |
2334 | if (err_mask) { | |
2335 | ata_dev_printk(dev, KERN_ERR, "failed to enable AA" | |
2336 | "(error_mask=0x%x)\n", err_mask); | |
2337 | if (err_mask != AC_ERR_DEV) { | |
2338 | dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA; | |
2339 | return -EIO; | |
2340 | } | |
2341 | } else | |
2342 | aa_desc = ", AA"; | |
2343 | } | |
2344 | ||
a6e6ce8e | 2345 | if (hdepth >= ddepth) |
388539f3 | 2346 | snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc); |
a6e6ce8e | 2347 | else |
388539f3 SL |
2348 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth, |
2349 | ddepth, aa_desc); | |
2350 | return 0; | |
a6e6ce8e TH |
2351 | } |
2352 | ||
49016aca | 2353 | /** |
ffeae418 | 2354 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
ffeae418 TH |
2355 | * @dev: Target device to configure |
2356 | * | |
2357 | * Configure @dev according to @dev->id. Generic and low-level | |
2358 | * driver specific fixups are also applied. | |
49016aca TH |
2359 | * |
2360 | * LOCKING: | |
ffeae418 TH |
2361 | * Kernel thread context (may sleep) |
2362 | * | |
2363 | * RETURNS: | |
2364 | * 0 on success, -errno otherwise | |
49016aca | 2365 | */ |
efdaedc4 | 2366 | int ata_dev_configure(struct ata_device *dev) |
49016aca | 2367 | { |
9af5c9c9 TH |
2368 | struct ata_port *ap = dev->link->ap; |
2369 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
6746544c | 2370 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
1148c3a7 | 2371 | const u16 *id = dev->id; |
7dc951ae | 2372 | unsigned long xfer_mask; |
b352e57d | 2373 | char revbuf[7]; /* XYZ-99\0 */ |
3f64f565 EM |
2374 | char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
2375 | char modelbuf[ATA_ID_PROD_LEN+1]; | |
e6d902a3 | 2376 | int rc; |
49016aca | 2377 | |
0dd4b21f | 2378 | if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
44877b4e | 2379 | ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", |
7f5e4e8d | 2380 | __func__); |
ffeae418 | 2381 | return 0; |
49016aca TH |
2382 | } |
2383 | ||
0dd4b21f | 2384 | if (ata_msg_probe(ap)) |
7f5e4e8d | 2385 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); |
1da177e4 | 2386 | |
75683fe7 TH |
2387 | /* set horkage */ |
2388 | dev->horkage |= ata_dev_blacklisted(dev); | |
33267325 | 2389 | ata_force_horkage(dev); |
75683fe7 | 2390 | |
50af2fa1 TH |
2391 | if (dev->horkage & ATA_HORKAGE_DISABLE) { |
2392 | ata_dev_printk(dev, KERN_INFO, | |
2393 | "unsupported device, disabling\n"); | |
2394 | ata_dev_disable(dev); | |
2395 | return 0; | |
2396 | } | |
2397 | ||
2486fa56 TH |
2398 | if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) && |
2399 | dev->class == ATA_DEV_ATAPI) { | |
2400 | ata_dev_printk(dev, KERN_WARNING, | |
2401 | "WARNING: ATAPI is %s, device ignored.\n", | |
2402 | atapi_enabled ? "not supported with this driver" | |
2403 | : "disabled"); | |
2404 | ata_dev_disable(dev); | |
2405 | return 0; | |
2406 | } | |
2407 | ||
9062712f TH |
2408 | rc = ata_do_link_spd_horkage(dev); |
2409 | if (rc) | |
2410 | return rc; | |
2411 | ||
6746544c TH |
2412 | /* let ACPI work its magic */ |
2413 | rc = ata_acpi_on_devcfg(dev); | |
2414 | if (rc) | |
2415 | return rc; | |
08573a86 | 2416 | |
05027adc TH |
2417 | /* massage HPA, do it early as it might change IDENTIFY data */ |
2418 | rc = ata_hpa_resize(dev); | |
2419 | if (rc) | |
2420 | return rc; | |
2421 | ||
c39f5ebe | 2422 | /* print device capabilities */ |
0dd4b21f | 2423 | if (ata_msg_probe(ap)) |
88574551 TH |
2424 | ata_dev_printk(dev, KERN_DEBUG, |
2425 | "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " | |
2426 | "85:%04x 86:%04x 87:%04x 88:%04x\n", | |
7f5e4e8d | 2427 | __func__, |
f15a1daf TH |
2428 | id[49], id[82], id[83], id[84], |
2429 | id[85], id[86], id[87], id[88]); | |
c39f5ebe | 2430 | |
208a9933 | 2431 | /* initialize to-be-configured parameters */ |
ea1dd4e1 | 2432 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
208a9933 TH |
2433 | dev->max_sectors = 0; |
2434 | dev->cdb_len = 0; | |
2435 | dev->n_sectors = 0; | |
2436 | dev->cylinders = 0; | |
2437 | dev->heads = 0; | |
2438 | dev->sectors = 0; | |
e18086d6 | 2439 | dev->multi_count = 0; |
208a9933 | 2440 | |
1da177e4 LT |
2441 | /* |
2442 | * common ATA, ATAPI feature tests | |
2443 | */ | |
2444 | ||
ff8854b2 | 2445 | /* find max transfer mode; for printk only */ |
1148c3a7 | 2446 | xfer_mask = ata_id_xfermask(id); |
1da177e4 | 2447 | |
0dd4b21f BP |
2448 | if (ata_msg_probe(ap)) |
2449 | ata_dump_id(id); | |
1da177e4 | 2450 | |
ef143d57 AL |
2451 | /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
2452 | ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, | |
2453 | sizeof(fwrevbuf)); | |
2454 | ||
2455 | ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, | |
2456 | sizeof(modelbuf)); | |
2457 | ||
1da177e4 LT |
2458 | /* ATA-specific feature tests */ |
2459 | if (dev->class == ATA_DEV_ATA) { | |
b352e57d | 2460 | if (ata_id_is_cfa(id)) { |
62afe5d7 SS |
2461 | /* CPRM may make this media unusable */ |
2462 | if (id[ATA_ID_CFA_KEY_MGMT] & 1) | |
44877b4e TH |
2463 | ata_dev_printk(dev, KERN_WARNING, |
2464 | "supports DRM functions and may " | |
2465 | "not be fully accessable.\n"); | |
b352e57d | 2466 | snprintf(revbuf, 7, "CFA"); |
ae8d4ee7 | 2467 | } else { |
2dcb407e | 2468 | snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); |
ae8d4ee7 AC |
2469 | /* Warn the user if the device has TPM extensions */ |
2470 | if (ata_id_has_tpm(id)) | |
2471 | ata_dev_printk(dev, KERN_WARNING, | |
2472 | "supports DRM functions and may " | |
2473 | "not be fully accessable.\n"); | |
2474 | } | |
b352e57d | 2475 | |
1148c3a7 | 2476 | dev->n_sectors = ata_id_n_sectors(id); |
2940740b | 2477 | |
e18086d6 ML |
2478 | /* get current R/W Multiple count setting */ |
2479 | if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) { | |
2480 | unsigned int max = dev->id[47] & 0xff; | |
2481 | unsigned int cnt = dev->id[59] & 0xff; | |
2482 | /* only recognize/allow powers of two here */ | |
2483 | if (is_power_of_2(max) && is_power_of_2(cnt)) | |
2484 | if (cnt <= max) | |
2485 | dev->multi_count = cnt; | |
2486 | } | |
3f64f565 | 2487 | |
1148c3a7 | 2488 | if (ata_id_has_lba(id)) { |
4c2d721a | 2489 | const char *lba_desc; |
388539f3 | 2490 | char ncq_desc[24]; |
8bf62ece | 2491 | |
4c2d721a TH |
2492 | lba_desc = "LBA"; |
2493 | dev->flags |= ATA_DFLAG_LBA; | |
1148c3a7 | 2494 | if (ata_id_has_lba48(id)) { |
8bf62ece | 2495 | dev->flags |= ATA_DFLAG_LBA48; |
4c2d721a | 2496 | lba_desc = "LBA48"; |
6fc49adb TH |
2497 | |
2498 | if (dev->n_sectors >= (1UL << 28) && | |
2499 | ata_id_has_flush_ext(id)) | |
2500 | dev->flags |= ATA_DFLAG_FLUSH_EXT; | |
4c2d721a | 2501 | } |
8bf62ece | 2502 | |
a6e6ce8e | 2503 | /* config NCQ */ |
388539f3 SL |
2504 | rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); |
2505 | if (rc) | |
2506 | return rc; | |
a6e6ce8e | 2507 | |
8bf62ece | 2508 | /* print device info to dmesg */ |
3f64f565 EM |
2509 | if (ata_msg_drv(ap) && print_info) { |
2510 | ata_dev_printk(dev, KERN_INFO, | |
2511 | "%s: %s, %s, max %s\n", | |
2512 | revbuf, modelbuf, fwrevbuf, | |
2513 | ata_mode_string(xfer_mask)); | |
2514 | ata_dev_printk(dev, KERN_INFO, | |
2515 | "%Lu sectors, multi %u: %s %s\n", | |
f15a1daf | 2516 | (unsigned long long)dev->n_sectors, |
3f64f565 EM |
2517 | dev->multi_count, lba_desc, ncq_desc); |
2518 | } | |
ffeae418 | 2519 | } else { |
8bf62ece AL |
2520 | /* CHS */ |
2521 | ||
2522 | /* Default translation */ | |
1148c3a7 TH |
2523 | dev->cylinders = id[1]; |
2524 | dev->heads = id[3]; | |
2525 | dev->sectors = id[6]; | |
8bf62ece | 2526 | |
1148c3a7 | 2527 | if (ata_id_current_chs_valid(id)) { |
8bf62ece | 2528 | /* Current CHS translation is valid. */ |
1148c3a7 TH |
2529 | dev->cylinders = id[54]; |
2530 | dev->heads = id[55]; | |
2531 | dev->sectors = id[56]; | |
8bf62ece AL |
2532 | } |
2533 | ||
2534 | /* print device info to dmesg */ | |
3f64f565 | 2535 | if (ata_msg_drv(ap) && print_info) { |
88574551 | 2536 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2537 | "%s: %s, %s, max %s\n", |
2538 | revbuf, modelbuf, fwrevbuf, | |
2539 | ata_mode_string(xfer_mask)); | |
a84471fe | 2540 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2541 | "%Lu sectors, multi %u, CHS %u/%u/%u\n", |
2542 | (unsigned long long)dev->n_sectors, | |
2543 | dev->multi_count, dev->cylinders, | |
2544 | dev->heads, dev->sectors); | |
2545 | } | |
07f6f7d0 AL |
2546 | } |
2547 | ||
6e7846e9 | 2548 | dev->cdb_len = 16; |
1da177e4 LT |
2549 | } |
2550 | ||
2551 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 2552 | else if (dev->class == ATA_DEV_ATAPI) { |
854c73a2 TH |
2553 | const char *cdb_intr_string = ""; |
2554 | const char *atapi_an_string = ""; | |
91163006 | 2555 | const char *dma_dir_string = ""; |
7d77b247 | 2556 | u32 sntf; |
08a556db | 2557 | |
1148c3a7 | 2558 | rc = atapi_cdb_len(id); |
1da177e4 | 2559 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
0dd4b21f | 2560 | if (ata_msg_warn(ap)) |
88574551 TH |
2561 | ata_dev_printk(dev, KERN_WARNING, |
2562 | "unsupported CDB len\n"); | |
ffeae418 | 2563 | rc = -EINVAL; |
1da177e4 LT |
2564 | goto err_out_nosup; |
2565 | } | |
6e7846e9 | 2566 | dev->cdb_len = (unsigned int) rc; |
1da177e4 | 2567 | |
7d77b247 TH |
2568 | /* Enable ATAPI AN if both the host and device have |
2569 | * the support. If PMP is attached, SNTF is required | |
2570 | * to enable ATAPI AN to discern between PHY status | |
2571 | * changed notifications and ATAPI ANs. | |
9f45cbd3 | 2572 | */ |
7d77b247 | 2573 | if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && |
071f44b1 | 2574 | (!sata_pmp_attached(ap) || |
7d77b247 | 2575 | sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { |
854c73a2 TH |
2576 | unsigned int err_mask; |
2577 | ||
9f45cbd3 | 2578 | /* issue SET feature command to turn this on */ |
218f3d30 JG |
2579 | err_mask = ata_dev_set_feature(dev, |
2580 | SETFEATURES_SATA_ENABLE, SATA_AN); | |
854c73a2 | 2581 | if (err_mask) |
9f45cbd3 | 2582 | ata_dev_printk(dev, KERN_ERR, |
854c73a2 TH |
2583 | "failed to enable ATAPI AN " |
2584 | "(err_mask=0x%x)\n", err_mask); | |
2585 | else { | |
9f45cbd3 | 2586 | dev->flags |= ATA_DFLAG_AN; |
854c73a2 TH |
2587 | atapi_an_string = ", ATAPI AN"; |
2588 | } | |
9f45cbd3 KCA |
2589 | } |
2590 | ||
08a556db | 2591 | if (ata_id_cdb_intr(dev->id)) { |
312f7da2 | 2592 | dev->flags |= ATA_DFLAG_CDB_INTR; |
08a556db AL |
2593 | cdb_intr_string = ", CDB intr"; |
2594 | } | |
312f7da2 | 2595 | |
91163006 TH |
2596 | if (atapi_dmadir || atapi_id_dmadir(dev->id)) { |
2597 | dev->flags |= ATA_DFLAG_DMADIR; | |
2598 | dma_dir_string = ", DMADIR"; | |
2599 | } | |
2600 | ||
1da177e4 | 2601 | /* print device info to dmesg */ |
5afc8142 | 2602 | if (ata_msg_drv(ap) && print_info) |
ef143d57 | 2603 | ata_dev_printk(dev, KERN_INFO, |
91163006 | 2604 | "ATAPI: %s, %s, max %s%s%s%s\n", |
ef143d57 | 2605 | modelbuf, fwrevbuf, |
12436c30 | 2606 | ata_mode_string(xfer_mask), |
91163006 TH |
2607 | cdb_intr_string, atapi_an_string, |
2608 | dma_dir_string); | |
1da177e4 LT |
2609 | } |
2610 | ||
914ed354 TH |
2611 | /* determine max_sectors */ |
2612 | dev->max_sectors = ATA_MAX_SECTORS; | |
2613 | if (dev->flags & ATA_DFLAG_LBA48) | |
2614 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; | |
2615 | ||
ca77329f KCA |
2616 | if (!(dev->horkage & ATA_HORKAGE_IPM)) { |
2617 | if (ata_id_has_hipm(dev->id)) | |
2618 | dev->flags |= ATA_DFLAG_HIPM; | |
2619 | if (ata_id_has_dipm(dev->id)) | |
2620 | dev->flags |= ATA_DFLAG_DIPM; | |
2621 | } | |
2622 | ||
c5038fc0 AC |
2623 | /* Limit PATA drive on SATA cable bridge transfers to udma5, |
2624 | 200 sectors */ | |
3373efd8 | 2625 | if (ata_dev_knobble(dev)) { |
5afc8142 | 2626 | if (ata_msg_drv(ap) && print_info) |
f15a1daf TH |
2627 | ata_dev_printk(dev, KERN_INFO, |
2628 | "applying bridge limits\n"); | |
5a529139 | 2629 | dev->udma_mask &= ATA_UDMA5; |
4b2f3ede TH |
2630 | dev->max_sectors = ATA_MAX_SECTORS; |
2631 | } | |
2632 | ||
f8d8e579 | 2633 | if ((dev->class == ATA_DEV_ATAPI) && |
f442cd86 | 2634 | (atapi_command_packet_set(id) == TYPE_TAPE)) { |
f8d8e579 | 2635 | dev->max_sectors = ATA_MAX_SECTORS_TAPE; |
f442cd86 AL |
2636 | dev->horkage |= ATA_HORKAGE_STUCK_ERR; |
2637 | } | |
f8d8e579 | 2638 | |
75683fe7 | 2639 | if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) |
03ec52de TH |
2640 | dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, |
2641 | dev->max_sectors); | |
18d6e9d5 | 2642 | |
ca77329f KCA |
2643 | if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) { |
2644 | dev->horkage |= ATA_HORKAGE_IPM; | |
2645 | ||
2646 | /* reset link pm_policy for this port to no pm */ | |
2647 | ap->pm_policy = MAX_PERFORMANCE; | |
2648 | } | |
2649 | ||
4b2f3ede | 2650 | if (ap->ops->dev_config) |
cd0d3bbc | 2651 | ap->ops->dev_config(dev); |
4b2f3ede | 2652 | |
c5038fc0 AC |
2653 | if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
2654 | /* Let the user know. We don't want to disallow opens for | |
2655 | rescue purposes, or in case the vendor is just a blithering | |
2656 | idiot. Do this after the dev_config call as some controllers | |
2657 | with buggy firmware may want to avoid reporting false device | |
2658 | bugs */ | |
2659 | ||
2660 | if (print_info) { | |
2661 | ata_dev_printk(dev, KERN_WARNING, | |
2662 | "Drive reports diagnostics failure. This may indicate a drive\n"); | |
2663 | ata_dev_printk(dev, KERN_WARNING, | |
2664 | "fault or invalid emulation. Contact drive vendor for information.\n"); | |
2665 | } | |
2666 | } | |
2667 | ||
ac70a964 TH |
2668 | if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) { |
2669 | ata_dev_printk(dev, KERN_WARNING, "WARNING: device requires " | |
2670 | "firmware update to be fully functional.\n"); | |
2671 | ata_dev_printk(dev, KERN_WARNING, " contact the vendor " | |
2672 | "or visit http://ata.wiki.kernel.org.\n"); | |
2673 | } | |
2674 | ||
ffeae418 | 2675 | return 0; |
1da177e4 LT |
2676 | |
2677 | err_out_nosup: | |
0dd4b21f | 2678 | if (ata_msg_probe(ap)) |
88574551 | 2679 | ata_dev_printk(dev, KERN_DEBUG, |
7f5e4e8d | 2680 | "%s: EXIT, err\n", __func__); |
ffeae418 | 2681 | return rc; |
1da177e4 LT |
2682 | } |
2683 | ||
be0d18df | 2684 | /** |
2e41e8e6 | 2685 | * ata_cable_40wire - return 40 wire cable type |
be0d18df AC |
2686 | * @ap: port |
2687 | * | |
2e41e8e6 | 2688 | * Helper method for drivers which want to hardwire 40 wire cable |
be0d18df AC |
2689 | * detection. |
2690 | */ | |
2691 | ||
2692 | int ata_cable_40wire(struct ata_port *ap) | |
2693 | { | |
2694 | return ATA_CBL_PATA40; | |
2695 | } | |
2696 | ||
2697 | /** | |
2e41e8e6 | 2698 | * ata_cable_80wire - return 80 wire cable type |
be0d18df AC |
2699 | * @ap: port |
2700 | * | |
2e41e8e6 | 2701 | * Helper method for drivers which want to hardwire 80 wire cable |
be0d18df AC |
2702 | * detection. |
2703 | */ | |
2704 | ||
2705 | int ata_cable_80wire(struct ata_port *ap) | |
2706 | { | |
2707 | return ATA_CBL_PATA80; | |
2708 | } | |
2709 | ||
2710 | /** | |
2711 | * ata_cable_unknown - return unknown PATA cable. | |
2712 | * @ap: port | |
2713 | * | |
2714 | * Helper method for drivers which have no PATA cable detection. | |
2715 | */ | |
2716 | ||
2717 | int ata_cable_unknown(struct ata_port *ap) | |
2718 | { | |
2719 | return ATA_CBL_PATA_UNK; | |
2720 | } | |
2721 | ||
c88f90c3 TH |
2722 | /** |
2723 | * ata_cable_ignore - return ignored PATA cable. | |
2724 | * @ap: port | |
2725 | * | |
2726 | * Helper method for drivers which don't use cable type to limit | |
2727 | * transfer mode. | |
2728 | */ | |
2729 | int ata_cable_ignore(struct ata_port *ap) | |
2730 | { | |
2731 | return ATA_CBL_PATA_IGN; | |
2732 | } | |
2733 | ||
be0d18df AC |
2734 | /** |
2735 | * ata_cable_sata - return SATA cable type | |
2736 | * @ap: port | |
2737 | * | |
2738 | * Helper method for drivers which have SATA cables | |
2739 | */ | |
2740 | ||
2741 | int ata_cable_sata(struct ata_port *ap) | |
2742 | { | |
2743 | return ATA_CBL_SATA; | |
2744 | } | |
2745 | ||
1da177e4 LT |
2746 | /** |
2747 | * ata_bus_probe - Reset and probe ATA bus | |
2748 | * @ap: Bus to probe | |
2749 | * | |
0cba632b JG |
2750 | * Master ATA bus probing function. Initiates a hardware-dependent |
2751 | * bus reset, then attempts to identify any devices found on | |
2752 | * the bus. | |
2753 | * | |
1da177e4 | 2754 | * LOCKING: |
0cba632b | 2755 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2756 | * |
2757 | * RETURNS: | |
96072e69 | 2758 | * Zero on success, negative errno otherwise. |
1da177e4 LT |
2759 | */ |
2760 | ||
80289167 | 2761 | int ata_bus_probe(struct ata_port *ap) |
1da177e4 | 2762 | { |
28ca5c57 | 2763 | unsigned int classes[ATA_MAX_DEVICES]; |
14d2bac1 | 2764 | int tries[ATA_MAX_DEVICES]; |
f58229f8 | 2765 | int rc; |
e82cbdb9 | 2766 | struct ata_device *dev; |
1da177e4 | 2767 | |
28ca5c57 | 2768 | ata_port_probe(ap); |
c19ba8af | 2769 | |
1eca4365 | 2770 | ata_for_each_dev(dev, &ap->link, ALL) |
f58229f8 | 2771 | tries[dev->devno] = ATA_PROBE_MAX_TRIES; |
14d2bac1 TH |
2772 | |
2773 | retry: | |
1eca4365 | 2774 | ata_for_each_dev(dev, &ap->link, ALL) { |
cdeab114 TH |
2775 | /* If we issue an SRST then an ATA drive (not ATAPI) |
2776 | * may change configuration and be in PIO0 timing. If | |
2777 | * we do a hard reset (or are coming from power on) | |
2778 | * this is true for ATA or ATAPI. Until we've set a | |
2779 | * suitable controller mode we should not touch the | |
2780 | * bus as we may be talking too fast. | |
2781 | */ | |
2782 | dev->pio_mode = XFER_PIO_0; | |
2783 | ||
2784 | /* If the controller has a pio mode setup function | |
2785 | * then use it to set the chipset to rights. Don't | |
2786 | * touch the DMA setup as that will be dealt with when | |
2787 | * configuring devices. | |
2788 | */ | |
2789 | if (ap->ops->set_piomode) | |
2790 | ap->ops->set_piomode(ap, dev); | |
2791 | } | |
2792 | ||
2044470c | 2793 | /* reset and determine device classes */ |
52783c5d | 2794 | ap->ops->phy_reset(ap); |
2061a47a | 2795 | |
1eca4365 | 2796 | ata_for_each_dev(dev, &ap->link, ALL) { |
52783c5d TH |
2797 | if (!(ap->flags & ATA_FLAG_DISABLED) && |
2798 | dev->class != ATA_DEV_UNKNOWN) | |
2799 | classes[dev->devno] = dev->class; | |
2800 | else | |
2801 | classes[dev->devno] = ATA_DEV_NONE; | |
2044470c | 2802 | |
52783c5d | 2803 | dev->class = ATA_DEV_UNKNOWN; |
28ca5c57 | 2804 | } |
1da177e4 | 2805 | |
52783c5d | 2806 | ata_port_probe(ap); |
2044470c | 2807 | |
f31f0cc2 JG |
2808 | /* read IDENTIFY page and configure devices. We have to do the identify |
2809 | specific sequence bass-ackwards so that PDIAG- is released by | |
2810 | the slave device */ | |
2811 | ||
1eca4365 | 2812 | ata_for_each_dev(dev, &ap->link, ALL_REVERSE) { |
f58229f8 TH |
2813 | if (tries[dev->devno]) |
2814 | dev->class = classes[dev->devno]; | |
ffeae418 | 2815 | |
14d2bac1 | 2816 | if (!ata_dev_enabled(dev)) |
ffeae418 | 2817 | continue; |
ffeae418 | 2818 | |
bff04647 TH |
2819 | rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
2820 | dev->id); | |
14d2bac1 TH |
2821 | if (rc) |
2822 | goto fail; | |
f31f0cc2 JG |
2823 | } |
2824 | ||
be0d18df AC |
2825 | /* Now ask for the cable type as PDIAG- should have been released */ |
2826 | if (ap->ops->cable_detect) | |
2827 | ap->cbl = ap->ops->cable_detect(ap); | |
2828 | ||
1eca4365 TH |
2829 | /* We may have SATA bridge glue hiding here irrespective of |
2830 | * the reported cable types and sensed types. When SATA | |
2831 | * drives indicate we have a bridge, we don't know which end | |
2832 | * of the link the bridge is which is a problem. | |
2833 | */ | |
2834 | ata_for_each_dev(dev, &ap->link, ENABLED) | |
614fe29b AC |
2835 | if (ata_id_is_sata(dev->id)) |
2836 | ap->cbl = ATA_CBL_SATA; | |
614fe29b | 2837 | |
f31f0cc2 JG |
2838 | /* After the identify sequence we can now set up the devices. We do |
2839 | this in the normal order so that the user doesn't get confused */ | |
2840 | ||
1eca4365 | 2841 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
9af5c9c9 | 2842 | ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; |
efdaedc4 | 2843 | rc = ata_dev_configure(dev); |
9af5c9c9 | 2844 | ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; |
14d2bac1 TH |
2845 | if (rc) |
2846 | goto fail; | |
1da177e4 LT |
2847 | } |
2848 | ||
e82cbdb9 | 2849 | /* configure transfer mode */ |
0260731f | 2850 | rc = ata_set_mode(&ap->link, &dev); |
4ae72a1e | 2851 | if (rc) |
51713d35 | 2852 | goto fail; |
1da177e4 | 2853 | |
1eca4365 TH |
2854 | ata_for_each_dev(dev, &ap->link, ENABLED) |
2855 | return 0; | |
1da177e4 | 2856 | |
e82cbdb9 TH |
2857 | /* no device present, disable port */ |
2858 | ata_port_disable(ap); | |
96072e69 | 2859 | return -ENODEV; |
14d2bac1 TH |
2860 | |
2861 | fail: | |
4ae72a1e TH |
2862 | tries[dev->devno]--; |
2863 | ||
14d2bac1 TH |
2864 | switch (rc) { |
2865 | case -EINVAL: | |
4ae72a1e | 2866 | /* eeek, something went very wrong, give up */ |
14d2bac1 TH |
2867 | tries[dev->devno] = 0; |
2868 | break; | |
4ae72a1e TH |
2869 | |
2870 | case -ENODEV: | |
2871 | /* give it just one more chance */ | |
2872 | tries[dev->devno] = min(tries[dev->devno], 1); | |
14d2bac1 | 2873 | case -EIO: |
4ae72a1e TH |
2874 | if (tries[dev->devno] == 1) { |
2875 | /* This is the last chance, better to slow | |
2876 | * down than lose it. | |
2877 | */ | |
a07d499b | 2878 | sata_down_spd_limit(&ap->link, 0); |
4ae72a1e TH |
2879 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
2880 | } | |
14d2bac1 TH |
2881 | } |
2882 | ||
4ae72a1e | 2883 | if (!tries[dev->devno]) |
3373efd8 | 2884 | ata_dev_disable(dev); |
ec573755 | 2885 | |
14d2bac1 | 2886 | goto retry; |
1da177e4 LT |
2887 | } |
2888 | ||
2889 | /** | |
0cba632b JG |
2890 | * ata_port_probe - Mark port as enabled |
2891 | * @ap: Port for which we indicate enablement | |
1da177e4 | 2892 | * |
0cba632b JG |
2893 | * Modify @ap data structure such that the system |
2894 | * thinks that the entire port is enabled. | |
2895 | * | |
cca3974e | 2896 | * LOCKING: host lock, or some other form of |
0cba632b | 2897 | * serialization. |
1da177e4 LT |
2898 | */ |
2899 | ||
2900 | void ata_port_probe(struct ata_port *ap) | |
2901 | { | |
198e0fed | 2902 | ap->flags &= ~ATA_FLAG_DISABLED; |
1da177e4 LT |
2903 | } |
2904 | ||
3be680b7 TH |
2905 | /** |
2906 | * sata_print_link_status - Print SATA link status | |
936fd732 | 2907 | * @link: SATA link to printk link status about |
3be680b7 TH |
2908 | * |
2909 | * This function prints link speed and status of a SATA link. | |
2910 | * | |
2911 | * LOCKING: | |
2912 | * None. | |
2913 | */ | |
6bdb4fc9 | 2914 | static void sata_print_link_status(struct ata_link *link) |
3be680b7 | 2915 | { |
6d5f9732 | 2916 | u32 sstatus, scontrol, tmp; |
3be680b7 | 2917 | |
936fd732 | 2918 | if (sata_scr_read(link, SCR_STATUS, &sstatus)) |
3be680b7 | 2919 | return; |
936fd732 | 2920 | sata_scr_read(link, SCR_CONTROL, &scontrol); |
3be680b7 | 2921 | |
b1c72916 | 2922 | if (ata_phys_link_online(link)) { |
3be680b7 | 2923 | tmp = (sstatus >> 4) & 0xf; |
936fd732 | 2924 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2925 | "SATA link up %s (SStatus %X SControl %X)\n", |
2926 | sata_spd_string(tmp), sstatus, scontrol); | |
3be680b7 | 2927 | } else { |
936fd732 | 2928 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2929 | "SATA link down (SStatus %X SControl %X)\n", |
2930 | sstatus, scontrol); | |
3be680b7 TH |
2931 | } |
2932 | } | |
2933 | ||
ebdfca6e AC |
2934 | /** |
2935 | * ata_dev_pair - return other device on cable | |
ebdfca6e AC |
2936 | * @adev: device |
2937 | * | |
2938 | * Obtain the other device on the same cable, or if none is | |
2939 | * present NULL is returned | |
2940 | */ | |
2e9edbf8 | 2941 | |
3373efd8 | 2942 | struct ata_device *ata_dev_pair(struct ata_device *adev) |
ebdfca6e | 2943 | { |
9af5c9c9 TH |
2944 | struct ata_link *link = adev->link; |
2945 | struct ata_device *pair = &link->device[1 - adev->devno]; | |
e1211e3f | 2946 | if (!ata_dev_enabled(pair)) |
ebdfca6e AC |
2947 | return NULL; |
2948 | return pair; | |
2949 | } | |
2950 | ||
1da177e4 | 2951 | /** |
780a87f7 JG |
2952 | * ata_port_disable - Disable port. |
2953 | * @ap: Port to be disabled. | |
1da177e4 | 2954 | * |
780a87f7 JG |
2955 | * Modify @ap data structure such that the system |
2956 | * thinks that the entire port is disabled, and should | |
2957 | * never attempt to probe or communicate with devices | |
2958 | * on this port. | |
2959 | * | |
cca3974e | 2960 | * LOCKING: host lock, or some other form of |
780a87f7 | 2961 | * serialization. |
1da177e4 LT |
2962 | */ |
2963 | ||
2964 | void ata_port_disable(struct ata_port *ap) | |
2965 | { | |
9af5c9c9 TH |
2966 | ap->link.device[0].class = ATA_DEV_NONE; |
2967 | ap->link.device[1].class = ATA_DEV_NONE; | |
198e0fed | 2968 | ap->flags |= ATA_FLAG_DISABLED; |
1da177e4 LT |
2969 | } |
2970 | ||
1c3fae4d | 2971 | /** |
3c567b7d | 2972 | * sata_down_spd_limit - adjust SATA spd limit downward |
936fd732 | 2973 | * @link: Link to adjust SATA spd limit for |
a07d499b | 2974 | * @spd_limit: Additional limit |
1c3fae4d | 2975 | * |
936fd732 | 2976 | * Adjust SATA spd limit of @link downward. Note that this |
1c3fae4d | 2977 | * function only adjusts the limit. The change must be applied |
3c567b7d | 2978 | * using sata_set_spd(). |
1c3fae4d | 2979 | * |
a07d499b TH |
2980 | * If @spd_limit is non-zero, the speed is limited to equal to or |
2981 | * lower than @spd_limit if such speed is supported. If | |
2982 | * @spd_limit is slower than any supported speed, only the lowest | |
2983 | * supported speed is allowed. | |
2984 | * | |
1c3fae4d TH |
2985 | * LOCKING: |
2986 | * Inherited from caller. | |
2987 | * | |
2988 | * RETURNS: | |
2989 | * 0 on success, negative errno on failure | |
2990 | */ | |
a07d499b | 2991 | int sata_down_spd_limit(struct ata_link *link, u32 spd_limit) |
1c3fae4d | 2992 | { |
81952c54 | 2993 | u32 sstatus, spd, mask; |
a07d499b | 2994 | int rc, bit; |
1c3fae4d | 2995 | |
936fd732 | 2996 | if (!sata_scr_valid(link)) |
008a7896 TH |
2997 | return -EOPNOTSUPP; |
2998 | ||
2999 | /* If SCR can be read, use it to determine the current SPD. | |
936fd732 | 3000 | * If not, use cached value in link->sata_spd. |
008a7896 | 3001 | */ |
936fd732 | 3002 | rc = sata_scr_read(link, SCR_STATUS, &sstatus); |
9913ff8a | 3003 | if (rc == 0 && ata_sstatus_online(sstatus)) |
008a7896 TH |
3004 | spd = (sstatus >> 4) & 0xf; |
3005 | else | |
936fd732 | 3006 | spd = link->sata_spd; |
1c3fae4d | 3007 | |
936fd732 | 3008 | mask = link->sata_spd_limit; |
1c3fae4d TH |
3009 | if (mask <= 1) |
3010 | return -EINVAL; | |
008a7896 TH |
3011 | |
3012 | /* unconditionally mask off the highest bit */ | |
a07d499b TH |
3013 | bit = fls(mask) - 1; |
3014 | mask &= ~(1 << bit); | |
1c3fae4d | 3015 | |
008a7896 TH |
3016 | /* Mask off all speeds higher than or equal to the current |
3017 | * one. Force 1.5Gbps if current SPD is not available. | |
3018 | */ | |
3019 | if (spd > 1) | |
3020 | mask &= (1 << (spd - 1)) - 1; | |
3021 | else | |
3022 | mask &= 1; | |
3023 | ||
3024 | /* were we already at the bottom? */ | |
1c3fae4d TH |
3025 | if (!mask) |
3026 | return -EINVAL; | |
3027 | ||
a07d499b TH |
3028 | if (spd_limit) { |
3029 | if (mask & ((1 << spd_limit) - 1)) | |
3030 | mask &= (1 << spd_limit) - 1; | |
3031 | else { | |
3032 | bit = ffs(mask) - 1; | |
3033 | mask = 1 << bit; | |
3034 | } | |
3035 | } | |
3036 | ||
936fd732 | 3037 | link->sata_spd_limit = mask; |
1c3fae4d | 3038 | |
936fd732 | 3039 | ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", |
f15a1daf | 3040 | sata_spd_string(fls(mask))); |
1c3fae4d TH |
3041 | |
3042 | return 0; | |
3043 | } | |
3044 | ||
936fd732 | 3045 | static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) |
1c3fae4d | 3046 | { |
5270222f TH |
3047 | struct ata_link *host_link = &link->ap->link; |
3048 | u32 limit, target, spd; | |
1c3fae4d | 3049 | |
5270222f TH |
3050 | limit = link->sata_spd_limit; |
3051 | ||
3052 | /* Don't configure downstream link faster than upstream link. | |
3053 | * It doesn't speed up anything and some PMPs choke on such | |
3054 | * configuration. | |
3055 | */ | |
3056 | if (!ata_is_host_link(link) && host_link->sata_spd) | |
3057 | limit &= (1 << host_link->sata_spd) - 1; | |
3058 | ||
3059 | if (limit == UINT_MAX) | |
3060 | target = 0; | |
1c3fae4d | 3061 | else |
5270222f | 3062 | target = fls(limit); |
1c3fae4d TH |
3063 | |
3064 | spd = (*scontrol >> 4) & 0xf; | |
5270222f | 3065 | *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4); |
1c3fae4d | 3066 | |
5270222f | 3067 | return spd != target; |
1c3fae4d TH |
3068 | } |
3069 | ||
3070 | /** | |
3c567b7d | 3071 | * sata_set_spd_needed - is SATA spd configuration needed |
936fd732 | 3072 | * @link: Link in question |
1c3fae4d TH |
3073 | * |
3074 | * Test whether the spd limit in SControl matches | |
936fd732 | 3075 | * @link->sata_spd_limit. This function is used to determine |
1c3fae4d TH |
3076 | * whether hardreset is necessary to apply SATA spd |
3077 | * configuration. | |
3078 | * | |
3079 | * LOCKING: | |
3080 | * Inherited from caller. | |
3081 | * | |
3082 | * RETURNS: | |
3083 | * 1 if SATA spd configuration is needed, 0 otherwise. | |
3084 | */ | |
1dc55e87 | 3085 | static int sata_set_spd_needed(struct ata_link *link) |
1c3fae4d TH |
3086 | { |
3087 | u32 scontrol; | |
3088 | ||
936fd732 | 3089 | if (sata_scr_read(link, SCR_CONTROL, &scontrol)) |
db64bcf3 | 3090 | return 1; |
1c3fae4d | 3091 | |
936fd732 | 3092 | return __sata_set_spd_needed(link, &scontrol); |
1c3fae4d TH |
3093 | } |
3094 | ||
3095 | /** | |
3c567b7d | 3096 | * sata_set_spd - set SATA spd according to spd limit |
936fd732 | 3097 | * @link: Link to set SATA spd for |
1c3fae4d | 3098 | * |
936fd732 | 3099 | * Set SATA spd of @link according to sata_spd_limit. |
1c3fae4d TH |
3100 | * |
3101 | * LOCKING: | |
3102 | * Inherited from caller. | |
3103 | * | |
3104 | * RETURNS: | |
3105 | * 0 if spd doesn't need to be changed, 1 if spd has been | |
81952c54 | 3106 | * changed. Negative errno if SCR registers are inaccessible. |
1c3fae4d | 3107 | */ |
936fd732 | 3108 | int sata_set_spd(struct ata_link *link) |
1c3fae4d TH |
3109 | { |
3110 | u32 scontrol; | |
81952c54 | 3111 | int rc; |
1c3fae4d | 3112 | |
936fd732 | 3113 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 3114 | return rc; |
1c3fae4d | 3115 | |
936fd732 | 3116 | if (!__sata_set_spd_needed(link, &scontrol)) |
1c3fae4d TH |
3117 | return 0; |
3118 | ||
936fd732 | 3119 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 TH |
3120 | return rc; |
3121 | ||
1c3fae4d TH |
3122 | return 1; |
3123 | } | |
3124 | ||
452503f9 AC |
3125 | /* |
3126 | * This mode timing computation functionality is ported over from | |
3127 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
3128 | */ | |
3129 | /* | |
b352e57d | 3130 | * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). |
452503f9 | 3131 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
b352e57d AC |
3132 | * for UDMA6, which is currently supported only by Maxtor drives. |
3133 | * | |
3134 | * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. | |
452503f9 AC |
3135 | */ |
3136 | ||
3137 | static const struct ata_timing ata_timing[] = { | |
3ada9c12 DD |
3138 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */ |
3139 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 }, | |
3140 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 }, | |
3141 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 }, | |
3142 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 }, | |
3143 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 }, | |
3144 | { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 }, | |
3145 | { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 }, | |
3146 | ||
3147 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 }, | |
3148 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 }, | |
3149 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 }, | |
3150 | ||
3151 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 }, | |
3152 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 }, | |
3153 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 }, | |
3154 | { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 }, | |
3155 | { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 }, | |
3156 | ||
3157 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
3158 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 }, | |
3159 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
3160 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 }, | |
3161 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
3162 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
3163 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
3164 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
452503f9 AC |
3165 | |
3166 | { 0xFF } | |
3167 | }; | |
3168 | ||
2dcb407e JG |
3169 | #define ENOUGH(v, unit) (((v)-1)/(unit)+1) |
3170 | #define EZ(v, unit) ((v)?ENOUGH(v, unit):0) | |
452503f9 AC |
3171 | |
3172 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
3173 | { | |
3ada9c12 DD |
3174 | q->setup = EZ(t->setup * 1000, T); |
3175 | q->act8b = EZ(t->act8b * 1000, T); | |
3176 | q->rec8b = EZ(t->rec8b * 1000, T); | |
3177 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
3178 | q->active = EZ(t->active * 1000, T); | |
3179 | q->recover = EZ(t->recover * 1000, T); | |
3180 | q->dmack_hold = EZ(t->dmack_hold * 1000, T); | |
3181 | q->cycle = EZ(t->cycle * 1000, T); | |
3182 | q->udma = EZ(t->udma * 1000, UT); | |
452503f9 AC |
3183 | } |
3184 | ||
3185 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
3186 | struct ata_timing *m, unsigned int what) | |
3187 | { | |
3188 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
3189 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
3190 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
3191 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
3192 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
3193 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
3ada9c12 | 3194 | if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold); |
452503f9 AC |
3195 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); |
3196 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
3197 | } | |
3198 | ||
6357357c | 3199 | const struct ata_timing *ata_timing_find_mode(u8 xfer_mode) |
452503f9 | 3200 | { |
70cd071e TH |
3201 | const struct ata_timing *t = ata_timing; |
3202 | ||
3203 | while (xfer_mode > t->mode) | |
3204 | t++; | |
452503f9 | 3205 | |
70cd071e TH |
3206 | if (xfer_mode == t->mode) |
3207 | return t; | |
3208 | return NULL; | |
452503f9 AC |
3209 | } |
3210 | ||
3211 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
3212 | struct ata_timing *t, int T, int UT) | |
3213 | { | |
3214 | const struct ata_timing *s; | |
3215 | struct ata_timing p; | |
3216 | ||
3217 | /* | |
2e9edbf8 | 3218 | * Find the mode. |
75b1f2f8 | 3219 | */ |
452503f9 AC |
3220 | |
3221 | if (!(s = ata_timing_find_mode(speed))) | |
3222 | return -EINVAL; | |
3223 | ||
75b1f2f8 AL |
3224 | memcpy(t, s, sizeof(*s)); |
3225 | ||
452503f9 AC |
3226 | /* |
3227 | * If the drive is an EIDE drive, it can tell us it needs extended | |
3228 | * PIO/MW_DMA cycle timing. | |
3229 | */ | |
3230 | ||
3231 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ | |
3232 | memset(&p, 0, sizeof(p)); | |
2dcb407e | 3233 | if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { |
452503f9 AC |
3234 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; |
3235 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; | |
2dcb407e | 3236 | } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { |
452503f9 AC |
3237 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; |
3238 | } | |
3239 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); | |
3240 | } | |
3241 | ||
3242 | /* | |
3243 | * Convert the timing to bus clock counts. | |
3244 | */ | |
3245 | ||
75b1f2f8 | 3246 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
3247 | |
3248 | /* | |
c893a3ae RD |
3249 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
3250 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
3251 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
3252 | */ |
3253 | ||
fd3367af | 3254 | if (speed > XFER_PIO_6) { |
452503f9 AC |
3255 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
3256 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
3257 | } | |
3258 | ||
3259 | /* | |
c893a3ae | 3260 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
3261 | */ |
3262 | ||
3263 | if (t->act8b + t->rec8b < t->cyc8b) { | |
3264 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
3265 | t->rec8b = t->cyc8b - t->act8b; | |
3266 | } | |
3267 | ||
3268 | if (t->active + t->recover < t->cycle) { | |
3269 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
3270 | t->recover = t->cycle - t->active; | |
3271 | } | |
a617c09f | 3272 | |
4f701d1e AC |
3273 | /* In a few cases quantisation may produce enough errors to |
3274 | leave t->cycle too low for the sum of active and recovery | |
3275 | if so we must correct this */ | |
3276 | if (t->active + t->recover > t->cycle) | |
3277 | t->cycle = t->active + t->recover; | |
452503f9 AC |
3278 | |
3279 | return 0; | |
3280 | } | |
3281 | ||
a0f79b92 TH |
3282 | /** |
3283 | * ata_timing_cycle2mode - find xfer mode for the specified cycle duration | |
3284 | * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. | |
3285 | * @cycle: cycle duration in ns | |
3286 | * | |
3287 | * Return matching xfer mode for @cycle. The returned mode is of | |
3288 | * the transfer type specified by @xfer_shift. If @cycle is too | |
3289 | * slow for @xfer_shift, 0xff is returned. If @cycle is faster | |
3290 | * than the fastest known mode, the fasted mode is returned. | |
3291 | * | |
3292 | * LOCKING: | |
3293 | * None. | |
3294 | * | |
3295 | * RETURNS: | |
3296 | * Matching xfer_mode, 0xff if no match found. | |
3297 | */ | |
3298 | u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) | |
3299 | { | |
3300 | u8 base_mode = 0xff, last_mode = 0xff; | |
3301 | const struct ata_xfer_ent *ent; | |
3302 | const struct ata_timing *t; | |
3303 | ||
3304 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
3305 | if (ent->shift == xfer_shift) | |
3306 | base_mode = ent->base; | |
3307 | ||
3308 | for (t = ata_timing_find_mode(base_mode); | |
3309 | t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { | |
3310 | unsigned short this_cycle; | |
3311 | ||
3312 | switch (xfer_shift) { | |
3313 | case ATA_SHIFT_PIO: | |
3314 | case ATA_SHIFT_MWDMA: | |
3315 | this_cycle = t->cycle; | |
3316 | break; | |
3317 | case ATA_SHIFT_UDMA: | |
3318 | this_cycle = t->udma; | |
3319 | break; | |
3320 | default: | |
3321 | return 0xff; | |
3322 | } | |
3323 | ||
3324 | if (cycle > this_cycle) | |
3325 | break; | |
3326 | ||
3327 | last_mode = t->mode; | |
3328 | } | |
3329 | ||
3330 | return last_mode; | |
3331 | } | |
3332 | ||
cf176e1a TH |
3333 | /** |
3334 | * ata_down_xfermask_limit - adjust dev xfer masks downward | |
cf176e1a | 3335 | * @dev: Device to adjust xfer masks |
458337db | 3336 | * @sel: ATA_DNXFER_* selector |
cf176e1a TH |
3337 | * |
3338 | * Adjust xfer masks of @dev downward. Note that this function | |
3339 | * does not apply the change. Invoking ata_set_mode() afterwards | |
3340 | * will apply the limit. | |
3341 | * | |
3342 | * LOCKING: | |
3343 | * Inherited from caller. | |
3344 | * | |
3345 | * RETURNS: | |
3346 | * 0 on success, negative errno on failure | |
3347 | */ | |
458337db | 3348 | int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
cf176e1a | 3349 | { |
458337db | 3350 | char buf[32]; |
7dc951ae TH |
3351 | unsigned long orig_mask, xfer_mask; |
3352 | unsigned long pio_mask, mwdma_mask, udma_mask; | |
458337db | 3353 | int quiet, highbit; |
cf176e1a | 3354 | |
458337db TH |
3355 | quiet = !!(sel & ATA_DNXFER_QUIET); |
3356 | sel &= ~ATA_DNXFER_QUIET; | |
cf176e1a | 3357 | |
458337db TH |
3358 | xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
3359 | dev->mwdma_mask, | |
3360 | dev->udma_mask); | |
3361 | ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); | |
cf176e1a | 3362 | |
458337db TH |
3363 | switch (sel) { |
3364 | case ATA_DNXFER_PIO: | |
3365 | highbit = fls(pio_mask) - 1; | |
3366 | pio_mask &= ~(1 << highbit); | |
3367 | break; | |
3368 | ||
3369 | case ATA_DNXFER_DMA: | |
3370 | if (udma_mask) { | |
3371 | highbit = fls(udma_mask) - 1; | |
3372 | udma_mask &= ~(1 << highbit); | |
3373 | if (!udma_mask) | |
3374 | return -ENOENT; | |
3375 | } else if (mwdma_mask) { | |
3376 | highbit = fls(mwdma_mask) - 1; | |
3377 | mwdma_mask &= ~(1 << highbit); | |
3378 | if (!mwdma_mask) | |
3379 | return -ENOENT; | |
3380 | } | |
3381 | break; | |
3382 | ||
3383 | case ATA_DNXFER_40C: | |
3384 | udma_mask &= ATA_UDMA_MASK_40C; | |
3385 | break; | |
3386 | ||
3387 | case ATA_DNXFER_FORCE_PIO0: | |
3388 | pio_mask &= 1; | |
3389 | case ATA_DNXFER_FORCE_PIO: | |
3390 | mwdma_mask = 0; | |
3391 | udma_mask = 0; | |
3392 | break; | |
3393 | ||
458337db TH |
3394 | default: |
3395 | BUG(); | |
3396 | } | |
3397 | ||
3398 | xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
3399 | ||
3400 | if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) | |
3401 | return -ENOENT; | |
3402 | ||
3403 | if (!quiet) { | |
3404 | if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) | |
3405 | snprintf(buf, sizeof(buf), "%s:%s", | |
3406 | ata_mode_string(xfer_mask), | |
3407 | ata_mode_string(xfer_mask & ATA_MASK_PIO)); | |
3408 | else | |
3409 | snprintf(buf, sizeof(buf), "%s", | |
3410 | ata_mode_string(xfer_mask)); | |
3411 | ||
3412 | ata_dev_printk(dev, KERN_WARNING, | |
3413 | "limiting speed to %s\n", buf); | |
3414 | } | |
cf176e1a TH |
3415 | |
3416 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, | |
3417 | &dev->udma_mask); | |
3418 | ||
cf176e1a | 3419 | return 0; |
cf176e1a TH |
3420 | } |
3421 | ||
3373efd8 | 3422 | static int ata_dev_set_mode(struct ata_device *dev) |
1da177e4 | 3423 | { |
d0cb43b3 | 3424 | struct ata_port *ap = dev->link->ap; |
9af5c9c9 | 3425 | struct ata_eh_context *ehc = &dev->link->eh_context; |
d0cb43b3 | 3426 | const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER; |
4055dee7 TH |
3427 | const char *dev_err_whine = ""; |
3428 | int ign_dev_err = 0; | |
d0cb43b3 | 3429 | unsigned int err_mask = 0; |
83206a29 | 3430 | int rc; |
1da177e4 | 3431 | |
e8384607 | 3432 | dev->flags &= ~ATA_DFLAG_PIO; |
1da177e4 LT |
3433 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
3434 | dev->flags |= ATA_DFLAG_PIO; | |
3435 | ||
d0cb43b3 TH |
3436 | if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id)) |
3437 | dev_err_whine = " (SET_XFERMODE skipped)"; | |
3438 | else { | |
3439 | if (nosetxfer) | |
3440 | ata_dev_printk(dev, KERN_WARNING, | |
3441 | "NOSETXFER but PATA detected - can't " | |
3442 | "skip SETXFER, might malfunction\n"); | |
3443 | err_mask = ata_dev_set_xfermode(dev); | |
3444 | } | |
2dcb407e | 3445 | |
4055dee7 TH |
3446 | if (err_mask & ~AC_ERR_DEV) |
3447 | goto fail; | |
3448 | ||
3449 | /* revalidate */ | |
3450 | ehc->i.flags |= ATA_EHI_POST_SETMODE; | |
3451 | rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); | |
3452 | ehc->i.flags &= ~ATA_EHI_POST_SETMODE; | |
3453 | if (rc) | |
3454 | return rc; | |
3455 | ||
b93fda12 AC |
3456 | if (dev->xfer_shift == ATA_SHIFT_PIO) { |
3457 | /* Old CFA may refuse this command, which is just fine */ | |
3458 | if (ata_id_is_cfa(dev->id)) | |
3459 | ign_dev_err = 1; | |
3460 | /* Catch several broken garbage emulations plus some pre | |
3461 | ATA devices */ | |
3462 | if (ata_id_major_version(dev->id) == 0 && | |
3463 | dev->pio_mode <= XFER_PIO_2) | |
3464 | ign_dev_err = 1; | |
3465 | /* Some very old devices and some bad newer ones fail | |
3466 | any kind of SET_XFERMODE request but support PIO0-2 | |
3467 | timings and no IORDY */ | |
3468 | if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2) | |
3469 | ign_dev_err = 1; | |
3470 | } | |
3acaf94b AC |
3471 | /* Early MWDMA devices do DMA but don't allow DMA mode setting. |
3472 | Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ | |
c5038fc0 | 3473 | if (dev->xfer_shift == ATA_SHIFT_MWDMA && |
3acaf94b AC |
3474 | dev->dma_mode == XFER_MW_DMA_0 && |
3475 | (dev->id[63] >> 8) & 1) | |
4055dee7 | 3476 | ign_dev_err = 1; |
3acaf94b | 3477 | |
4055dee7 TH |
3478 | /* if the device is actually configured correctly, ignore dev err */ |
3479 | if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) | |
3480 | ign_dev_err = 1; | |
1da177e4 | 3481 | |
4055dee7 TH |
3482 | if (err_mask & AC_ERR_DEV) { |
3483 | if (!ign_dev_err) | |
3484 | goto fail; | |
3485 | else | |
3486 | dev_err_whine = " (device error ignored)"; | |
3487 | } | |
48a8a14f | 3488 | |
23e71c3d TH |
3489 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
3490 | dev->xfer_shift, (int)dev->xfer_mode); | |
1da177e4 | 3491 | |
4055dee7 TH |
3492 | ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n", |
3493 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), | |
3494 | dev_err_whine); | |
3495 | ||
83206a29 | 3496 | return 0; |
4055dee7 TH |
3497 | |
3498 | fail: | |
3499 | ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " | |
3500 | "(err_mask=0x%x)\n", err_mask); | |
3501 | return -EIO; | |
1da177e4 LT |
3502 | } |
3503 | ||
1da177e4 | 3504 | /** |
04351821 | 3505 | * ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
0260731f | 3506 | * @link: link on which timings will be programmed |
1967b7ff | 3507 | * @r_failed_dev: out parameter for failed device |
1da177e4 | 3508 | * |
04351821 AC |
3509 | * Standard implementation of the function used to tune and set |
3510 | * ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3511 | * ata_dev_set_mode() fails, pointer to the failing device is | |
e82cbdb9 | 3512 | * returned in @r_failed_dev. |
780a87f7 | 3513 | * |
1da177e4 | 3514 | * LOCKING: |
0cba632b | 3515 | * PCI/etc. bus probe sem. |
e82cbdb9 TH |
3516 | * |
3517 | * RETURNS: | |
3518 | * 0 on success, negative errno otherwise | |
1da177e4 | 3519 | */ |
04351821 | 3520 | |
0260731f | 3521 | int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
1da177e4 | 3522 | { |
0260731f | 3523 | struct ata_port *ap = link->ap; |
e8e0619f | 3524 | struct ata_device *dev; |
f58229f8 | 3525 | int rc = 0, used_dma = 0, found = 0; |
3adcebb2 | 3526 | |
a6d5a51c | 3527 | /* step 1: calculate xfer_mask */ |
1eca4365 | 3528 | ata_for_each_dev(dev, link, ENABLED) { |
7dc951ae | 3529 | unsigned long pio_mask, dma_mask; |
b3a70601 | 3530 | unsigned int mode_mask; |
a6d5a51c | 3531 | |
b3a70601 AC |
3532 | mode_mask = ATA_DMA_MASK_ATA; |
3533 | if (dev->class == ATA_DEV_ATAPI) | |
3534 | mode_mask = ATA_DMA_MASK_ATAPI; | |
3535 | else if (ata_id_is_cfa(dev->id)) | |
3536 | mode_mask = ATA_DMA_MASK_CFA; | |
3537 | ||
3373efd8 | 3538 | ata_dev_xfermask(dev); |
33267325 | 3539 | ata_force_xfermask(dev); |
1da177e4 | 3540 | |
acf356b1 TH |
3541 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
3542 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
b3a70601 AC |
3543 | |
3544 | if (libata_dma_mask & mode_mask) | |
3545 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
3546 | else | |
3547 | dma_mask = 0; | |
3548 | ||
acf356b1 TH |
3549 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); |
3550 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
5444a6f4 | 3551 | |
4f65977d | 3552 | found = 1; |
b15b3eba | 3553 | if (ata_dma_enabled(dev)) |
5444a6f4 | 3554 | used_dma = 1; |
a6d5a51c | 3555 | } |
4f65977d | 3556 | if (!found) |
e82cbdb9 | 3557 | goto out; |
a6d5a51c TH |
3558 | |
3559 | /* step 2: always set host PIO timings */ | |
1eca4365 | 3560 | ata_for_each_dev(dev, link, ENABLED) { |
70cd071e | 3561 | if (dev->pio_mode == 0xff) { |
f15a1daf | 3562 | ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); |
e8e0619f | 3563 | rc = -EINVAL; |
e82cbdb9 | 3564 | goto out; |
e8e0619f TH |
3565 | } |
3566 | ||
3567 | dev->xfer_mode = dev->pio_mode; | |
3568 | dev->xfer_shift = ATA_SHIFT_PIO; | |
3569 | if (ap->ops->set_piomode) | |
3570 | ap->ops->set_piomode(ap, dev); | |
3571 | } | |
1da177e4 | 3572 | |
a6d5a51c | 3573 | /* step 3: set host DMA timings */ |
1eca4365 TH |
3574 | ata_for_each_dev(dev, link, ENABLED) { |
3575 | if (!ata_dma_enabled(dev)) | |
e8e0619f TH |
3576 | continue; |
3577 | ||
3578 | dev->xfer_mode = dev->dma_mode; | |
3579 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
3580 | if (ap->ops->set_dmamode) | |
3581 | ap->ops->set_dmamode(ap, dev); | |
3582 | } | |
1da177e4 LT |
3583 | |
3584 | /* step 4: update devices' xfer mode */ | |
1eca4365 | 3585 | ata_for_each_dev(dev, link, ENABLED) { |
3373efd8 | 3586 | rc = ata_dev_set_mode(dev); |
5bbc53f4 | 3587 | if (rc) |
e82cbdb9 | 3588 | goto out; |
83206a29 | 3589 | } |
1da177e4 | 3590 | |
e8e0619f TH |
3591 | /* Record simplex status. If we selected DMA then the other |
3592 | * host channels are not permitted to do so. | |
5444a6f4 | 3593 | */ |
cca3974e | 3594 | if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
032af1ce | 3595 | ap->host->simplex_claimed = ap; |
5444a6f4 | 3596 | |
e82cbdb9 TH |
3597 | out: |
3598 | if (rc) | |
3599 | *r_failed_dev = dev; | |
3600 | return rc; | |
1da177e4 LT |
3601 | } |
3602 | ||
aa2731ad TH |
3603 | /** |
3604 | * ata_wait_ready - wait for link to become ready | |
3605 | * @link: link to be waited on | |
3606 | * @deadline: deadline jiffies for the operation | |
3607 | * @check_ready: callback to check link readiness | |
3608 | * | |
3609 | * Wait for @link to become ready. @check_ready should return | |
3610 | * positive number if @link is ready, 0 if it isn't, -ENODEV if | |
3611 | * link doesn't seem to be occupied, other errno for other error | |
3612 | * conditions. | |
3613 | * | |
3614 | * Transient -ENODEV conditions are allowed for | |
3615 | * ATA_TMOUT_FF_WAIT. | |
3616 | * | |
3617 | * LOCKING: | |
3618 | * EH context. | |
3619 | * | |
3620 | * RETURNS: | |
3621 | * 0 if @linke is ready before @deadline; otherwise, -errno. | |
3622 | */ | |
3623 | int ata_wait_ready(struct ata_link *link, unsigned long deadline, | |
3624 | int (*check_ready)(struct ata_link *link)) | |
3625 | { | |
3626 | unsigned long start = jiffies; | |
341c2c95 | 3627 | unsigned long nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT); |
aa2731ad TH |
3628 | int warned = 0; |
3629 | ||
b1c72916 TH |
3630 | /* Slave readiness can't be tested separately from master. On |
3631 | * M/S emulation configuration, this function should be called | |
3632 | * only on the master and it will handle both master and slave. | |
3633 | */ | |
3634 | WARN_ON(link == link->ap->slave_link); | |
3635 | ||
aa2731ad TH |
3636 | if (time_after(nodev_deadline, deadline)) |
3637 | nodev_deadline = deadline; | |
3638 | ||
3639 | while (1) { | |
3640 | unsigned long now = jiffies; | |
3641 | int ready, tmp; | |
3642 | ||
3643 | ready = tmp = check_ready(link); | |
3644 | if (ready > 0) | |
3645 | return 0; | |
3646 | ||
3647 | /* -ENODEV could be transient. Ignore -ENODEV if link | |
3648 | * is online. Also, some SATA devices take a long | |
3649 | * time to clear 0xff after reset. For example, | |
3650 | * HHD424020F7SV00 iVDR needs >= 800ms while Quantum | |
3651 | * GoVault needs even more than that. Wait for | |
3652 | * ATA_TMOUT_FF_WAIT on -ENODEV if link isn't offline. | |
3653 | * | |
3654 | * Note that some PATA controllers (pata_ali) explode | |
3655 | * if status register is read more than once when | |
3656 | * there's no device attached. | |
3657 | */ | |
3658 | if (ready == -ENODEV) { | |
3659 | if (ata_link_online(link)) | |
3660 | ready = 0; | |
3661 | else if ((link->ap->flags & ATA_FLAG_SATA) && | |
3662 | !ata_link_offline(link) && | |
3663 | time_before(now, nodev_deadline)) | |
3664 | ready = 0; | |
3665 | } | |
3666 | ||
3667 | if (ready) | |
3668 | return ready; | |
3669 | if (time_after(now, deadline)) | |
3670 | return -EBUSY; | |
3671 | ||
3672 | if (!warned && time_after(now, start + 5 * HZ) && | |
3673 | (deadline - now > 3 * HZ)) { | |
3674 | ata_link_printk(link, KERN_WARNING, | |
3675 | "link is slow to respond, please be patient " | |
3676 | "(ready=%d)\n", tmp); | |
3677 | warned = 1; | |
3678 | } | |
3679 | ||
3680 | msleep(50); | |
3681 | } | |
3682 | } | |
3683 | ||
3684 | /** | |
3685 | * ata_wait_after_reset - wait for link to become ready after reset | |
3686 | * @link: link to be waited on | |
3687 | * @deadline: deadline jiffies for the operation | |
3688 | * @check_ready: callback to check link readiness | |
3689 | * | |
3690 | * Wait for @link to become ready after reset. | |
3691 | * | |
3692 | * LOCKING: | |
3693 | * EH context. | |
3694 | * | |
3695 | * RETURNS: | |
3696 | * 0 if @linke is ready before @deadline; otherwise, -errno. | |
3697 | */ | |
2b4221bb | 3698 | int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, |
aa2731ad TH |
3699 | int (*check_ready)(struct ata_link *link)) |
3700 | { | |
341c2c95 | 3701 | msleep(ATA_WAIT_AFTER_RESET); |
aa2731ad TH |
3702 | |
3703 | return ata_wait_ready(link, deadline, check_ready); | |
3704 | } | |
3705 | ||
d7bb4cc7 | 3706 | /** |
936fd732 TH |
3707 | * sata_link_debounce - debounce SATA phy status |
3708 | * @link: ATA link to debounce SATA phy status for | |
d7bb4cc7 | 3709 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3710 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3711 | * |
936fd732 | 3712 | * Make sure SStatus of @link reaches stable state, determined by |
d7bb4cc7 TH |
3713 | * holding the same value where DET is not 1 for @duration polled |
3714 | * every @interval, before @timeout. Timeout constraints the | |
d4b2bab4 TH |
3715 | * beginning of the stable state. Because DET gets stuck at 1 on |
3716 | * some controllers after hot unplugging, this functions waits | |
d7bb4cc7 TH |
3717 | * until timeout then returns 0 if DET is stable at 1. |
3718 | * | |
d4b2bab4 TH |
3719 | * @timeout is further limited by @deadline. The sooner of the |
3720 | * two is used. | |
3721 | * | |
d7bb4cc7 TH |
3722 | * LOCKING: |
3723 | * Kernel thread context (may sleep) | |
3724 | * | |
3725 | * RETURNS: | |
3726 | * 0 on success, -errno on failure. | |
3727 | */ | |
936fd732 TH |
3728 | int sata_link_debounce(struct ata_link *link, const unsigned long *params, |
3729 | unsigned long deadline) | |
7a7921e8 | 3730 | { |
341c2c95 TH |
3731 | unsigned long interval = params[0]; |
3732 | unsigned long duration = params[1]; | |
d4b2bab4 | 3733 | unsigned long last_jiffies, t; |
d7bb4cc7 TH |
3734 | u32 last, cur; |
3735 | int rc; | |
3736 | ||
341c2c95 | 3737 | t = ata_deadline(jiffies, params[2]); |
d4b2bab4 TH |
3738 | if (time_before(t, deadline)) |
3739 | deadline = t; | |
3740 | ||
936fd732 | 3741 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3742 | return rc; |
3743 | cur &= 0xf; | |
3744 | ||
3745 | last = cur; | |
3746 | last_jiffies = jiffies; | |
3747 | ||
3748 | while (1) { | |
341c2c95 | 3749 | msleep(interval); |
936fd732 | 3750 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3751 | return rc; |
3752 | cur &= 0xf; | |
3753 | ||
3754 | /* DET stable? */ | |
3755 | if (cur == last) { | |
d4b2bab4 | 3756 | if (cur == 1 && time_before(jiffies, deadline)) |
d7bb4cc7 | 3757 | continue; |
341c2c95 TH |
3758 | if (time_after(jiffies, |
3759 | ata_deadline(last_jiffies, duration))) | |
d7bb4cc7 TH |
3760 | return 0; |
3761 | continue; | |
3762 | } | |
3763 | ||
3764 | /* unstable, start over */ | |
3765 | last = cur; | |
3766 | last_jiffies = jiffies; | |
3767 | ||
f1545154 TH |
3768 | /* Check deadline. If debouncing failed, return |
3769 | * -EPIPE to tell upper layer to lower link speed. | |
3770 | */ | |
d4b2bab4 | 3771 | if (time_after(jiffies, deadline)) |
f1545154 | 3772 | return -EPIPE; |
d7bb4cc7 TH |
3773 | } |
3774 | } | |
3775 | ||
3776 | /** | |
936fd732 TH |
3777 | * sata_link_resume - resume SATA link |
3778 | * @link: ATA link to resume SATA | |
d7bb4cc7 | 3779 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3780 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3781 | * |
936fd732 | 3782 | * Resume SATA phy @link and debounce it. |
d7bb4cc7 TH |
3783 | * |
3784 | * LOCKING: | |
3785 | * Kernel thread context (may sleep) | |
3786 | * | |
3787 | * RETURNS: | |
3788 | * 0 on success, -errno on failure. | |
3789 | */ | |
936fd732 TH |
3790 | int sata_link_resume(struct ata_link *link, const unsigned long *params, |
3791 | unsigned long deadline) | |
d7bb4cc7 | 3792 | { |
5040ab67 | 3793 | int tries = ATA_LINK_RESUME_TRIES; |
ac371987 | 3794 | u32 scontrol, serror; |
81952c54 TH |
3795 | int rc; |
3796 | ||
936fd732 | 3797 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 3798 | return rc; |
7a7921e8 | 3799 | |
5040ab67 TH |
3800 | /* |
3801 | * Writes to SControl sometimes get ignored under certain | |
3802 | * controllers (ata_piix SIDPR). Make sure DET actually is | |
3803 | * cleared. | |
3804 | */ | |
3805 | do { | |
3806 | scontrol = (scontrol & 0x0f0) | 0x300; | |
3807 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) | |
3808 | return rc; | |
3809 | /* | |
3810 | * Some PHYs react badly if SStatus is pounded | |
3811 | * immediately after resuming. Delay 200ms before | |
3812 | * debouncing. | |
3813 | */ | |
3814 | msleep(200); | |
81952c54 | 3815 | |
5040ab67 TH |
3816 | /* is SControl restored correctly? */ |
3817 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) | |
3818 | return rc; | |
3819 | } while ((scontrol & 0xf0f) != 0x300 && --tries); | |
7a7921e8 | 3820 | |
5040ab67 TH |
3821 | if ((scontrol & 0xf0f) != 0x300) { |
3822 | ata_link_printk(link, KERN_ERR, | |
3823 | "failed to resume link (SControl %X)\n", | |
3824 | scontrol); | |
3825 | return 0; | |
3826 | } | |
3827 | ||
3828 | if (tries < ATA_LINK_RESUME_TRIES) | |
3829 | ata_link_printk(link, KERN_WARNING, | |
3830 | "link resume succeeded after %d retries\n", | |
3831 | ATA_LINK_RESUME_TRIES - tries); | |
7a7921e8 | 3832 | |
ac371987 TH |
3833 | if ((rc = sata_link_debounce(link, params, deadline))) |
3834 | return rc; | |
3835 | ||
f046519f | 3836 | /* clear SError, some PHYs require this even for SRST to work */ |
ac371987 TH |
3837 | if (!(rc = sata_scr_read(link, SCR_ERROR, &serror))) |
3838 | rc = sata_scr_write(link, SCR_ERROR, serror); | |
ac371987 | 3839 | |
f046519f | 3840 | return rc != -EINVAL ? rc : 0; |
7a7921e8 TH |
3841 | } |
3842 | ||
f5914a46 | 3843 | /** |
0aa1113d | 3844 | * ata_std_prereset - prepare for reset |
cc0680a5 | 3845 | * @link: ATA link to be reset |
d4b2bab4 | 3846 | * @deadline: deadline jiffies for the operation |
f5914a46 | 3847 | * |
cc0680a5 | 3848 | * @link is about to be reset. Initialize it. Failure from |
b8cffc6a TH |
3849 | * prereset makes libata abort whole reset sequence and give up |
3850 | * that port, so prereset should be best-effort. It does its | |
3851 | * best to prepare for reset sequence but if things go wrong, it | |
3852 | * should just whine, not fail. | |
f5914a46 TH |
3853 | * |
3854 | * LOCKING: | |
3855 | * Kernel thread context (may sleep) | |
3856 | * | |
3857 | * RETURNS: | |
3858 | * 0 on success, -errno otherwise. | |
3859 | */ | |
0aa1113d | 3860 | int ata_std_prereset(struct ata_link *link, unsigned long deadline) |
f5914a46 | 3861 | { |
cc0680a5 | 3862 | struct ata_port *ap = link->ap; |
936fd732 | 3863 | struct ata_eh_context *ehc = &link->eh_context; |
e9c83914 | 3864 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
f5914a46 TH |
3865 | int rc; |
3866 | ||
f5914a46 TH |
3867 | /* if we're about to do hardreset, nothing more to do */ |
3868 | if (ehc->i.action & ATA_EH_HARDRESET) | |
3869 | return 0; | |
3870 | ||
936fd732 | 3871 | /* if SATA, resume link */ |
a16abc0b | 3872 | if (ap->flags & ATA_FLAG_SATA) { |
936fd732 | 3873 | rc = sata_link_resume(link, timing, deadline); |
b8cffc6a TH |
3874 | /* whine about phy resume failure but proceed */ |
3875 | if (rc && rc != -EOPNOTSUPP) | |
cc0680a5 | 3876 | ata_link_printk(link, KERN_WARNING, "failed to resume " |
f5914a46 | 3877 | "link for reset (errno=%d)\n", rc); |
f5914a46 TH |
3878 | } |
3879 | ||
45db2f6c | 3880 | /* no point in trying softreset on offline link */ |
b1c72916 | 3881 | if (ata_phys_link_offline(link)) |
45db2f6c TH |
3882 | ehc->i.action &= ~ATA_EH_SOFTRESET; |
3883 | ||
f5914a46 TH |
3884 | return 0; |
3885 | } | |
3886 | ||
c2bd5804 | 3887 | /** |
624d5c51 TH |
3888 | * sata_link_hardreset - reset link via SATA phy reset |
3889 | * @link: link to reset | |
3890 | * @timing: timing parameters { interval, duratinon, timeout } in msec | |
d4b2bab4 | 3891 | * @deadline: deadline jiffies for the operation |
9dadd45b TH |
3892 | * @online: optional out parameter indicating link onlineness |
3893 | * @check_ready: optional callback to check link readiness | |
c2bd5804 | 3894 | * |
624d5c51 | 3895 | * SATA phy-reset @link using DET bits of SControl register. |
9dadd45b TH |
3896 | * After hardreset, link readiness is waited upon using |
3897 | * ata_wait_ready() if @check_ready is specified. LLDs are | |
3898 | * allowed to not specify @check_ready and wait itself after this | |
3899 | * function returns. Device classification is LLD's | |
3900 | * responsibility. | |
3901 | * | |
3902 | * *@online is set to one iff reset succeeded and @link is online | |
3903 | * after reset. | |
c2bd5804 TH |
3904 | * |
3905 | * LOCKING: | |
3906 | * Kernel thread context (may sleep) | |
3907 | * | |
3908 | * RETURNS: | |
3909 | * 0 on success, -errno otherwise. | |
3910 | */ | |
624d5c51 | 3911 | int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, |
9dadd45b TH |
3912 | unsigned long deadline, |
3913 | bool *online, int (*check_ready)(struct ata_link *)) | |
c2bd5804 | 3914 | { |
624d5c51 | 3915 | u32 scontrol; |
81952c54 | 3916 | int rc; |
852ee16a | 3917 | |
c2bd5804 TH |
3918 | DPRINTK("ENTER\n"); |
3919 | ||
9dadd45b TH |
3920 | if (online) |
3921 | *online = false; | |
3922 | ||
936fd732 | 3923 | if (sata_set_spd_needed(link)) { |
1c3fae4d TH |
3924 | /* SATA spec says nothing about how to reconfigure |
3925 | * spd. To be on the safe side, turn off phy during | |
3926 | * reconfiguration. This works for at least ICH7 AHCI | |
3927 | * and Sil3124. | |
3928 | */ | |
936fd732 | 3929 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 3930 | goto out; |
81952c54 | 3931 | |
a34b6fc0 | 3932 | scontrol = (scontrol & 0x0f0) | 0x304; |
81952c54 | 3933 | |
936fd732 | 3934 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
b6103f6d | 3935 | goto out; |
1c3fae4d | 3936 | |
936fd732 | 3937 | sata_set_spd(link); |
1c3fae4d TH |
3938 | } |
3939 | ||
3940 | /* issue phy wake/reset */ | |
936fd732 | 3941 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 3942 | goto out; |
81952c54 | 3943 | |
852ee16a | 3944 | scontrol = (scontrol & 0x0f0) | 0x301; |
81952c54 | 3945 | |
936fd732 | 3946 | if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) |
b6103f6d | 3947 | goto out; |
c2bd5804 | 3948 | |
1c3fae4d | 3949 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
c2bd5804 TH |
3950 | * 10.4.2 says at least 1 ms. |
3951 | */ | |
3952 | msleep(1); | |
3953 | ||
936fd732 TH |
3954 | /* bring link back */ |
3955 | rc = sata_link_resume(link, timing, deadline); | |
9dadd45b TH |
3956 | if (rc) |
3957 | goto out; | |
3958 | /* if link is offline nothing more to do */ | |
b1c72916 | 3959 | if (ata_phys_link_offline(link)) |
9dadd45b TH |
3960 | goto out; |
3961 | ||
3962 | /* Link is online. From this point, -ENODEV too is an error. */ | |
3963 | if (online) | |
3964 | *online = true; | |
3965 | ||
071f44b1 | 3966 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) { |
9dadd45b TH |
3967 | /* If PMP is supported, we have to do follow-up SRST. |
3968 | * Some PMPs don't send D2H Reg FIS after hardreset if | |
3969 | * the first port is empty. Wait only for | |
3970 | * ATA_TMOUT_PMP_SRST_WAIT. | |
3971 | */ | |
3972 | if (check_ready) { | |
3973 | unsigned long pmp_deadline; | |
3974 | ||
341c2c95 TH |
3975 | pmp_deadline = ata_deadline(jiffies, |
3976 | ATA_TMOUT_PMP_SRST_WAIT); | |
9dadd45b TH |
3977 | if (time_after(pmp_deadline, deadline)) |
3978 | pmp_deadline = deadline; | |
3979 | ata_wait_ready(link, pmp_deadline, check_ready); | |
3980 | } | |
3981 | rc = -EAGAIN; | |
3982 | goto out; | |
3983 | } | |
3984 | ||
3985 | rc = 0; | |
3986 | if (check_ready) | |
3987 | rc = ata_wait_ready(link, deadline, check_ready); | |
b6103f6d | 3988 | out: |
0cbf0711 TH |
3989 | if (rc && rc != -EAGAIN) { |
3990 | /* online is set iff link is online && reset succeeded */ | |
3991 | if (online) | |
3992 | *online = false; | |
9dadd45b TH |
3993 | ata_link_printk(link, KERN_ERR, |
3994 | "COMRESET failed (errno=%d)\n", rc); | |
0cbf0711 | 3995 | } |
b6103f6d TH |
3996 | DPRINTK("EXIT, rc=%d\n", rc); |
3997 | return rc; | |
3998 | } | |
3999 | ||
57c9efdf TH |
4000 | /** |
4001 | * sata_std_hardreset - COMRESET w/o waiting or classification | |
4002 | * @link: link to reset | |
4003 | * @class: resulting class of attached device | |
4004 | * @deadline: deadline jiffies for the operation | |
4005 | * | |
4006 | * Standard SATA COMRESET w/o waiting or classification. | |
4007 | * | |
4008 | * LOCKING: | |
4009 | * Kernel thread context (may sleep) | |
4010 | * | |
4011 | * RETURNS: | |
4012 | * 0 if link offline, -EAGAIN if link online, -errno on errors. | |
4013 | */ | |
4014 | int sata_std_hardreset(struct ata_link *link, unsigned int *class, | |
4015 | unsigned long deadline) | |
4016 | { | |
4017 | const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); | |
4018 | bool online; | |
4019 | int rc; | |
4020 | ||
4021 | /* do hardreset */ | |
4022 | rc = sata_link_hardreset(link, timing, deadline, &online, NULL); | |
57c9efdf TH |
4023 | return online ? -EAGAIN : rc; |
4024 | } | |
4025 | ||
c2bd5804 | 4026 | /** |
203c75b8 | 4027 | * ata_std_postreset - standard postreset callback |
cc0680a5 | 4028 | * @link: the target ata_link |
c2bd5804 TH |
4029 | * @classes: classes of attached devices |
4030 | * | |
4031 | * This function is invoked after a successful reset. Note that | |
4032 | * the device might have been reset more than once using | |
4033 | * different reset methods before postreset is invoked. | |
c2bd5804 | 4034 | * |
c2bd5804 TH |
4035 | * LOCKING: |
4036 | * Kernel thread context (may sleep) | |
4037 | */ | |
203c75b8 | 4038 | void ata_std_postreset(struct ata_link *link, unsigned int *classes) |
c2bd5804 | 4039 | { |
f046519f TH |
4040 | u32 serror; |
4041 | ||
c2bd5804 TH |
4042 | DPRINTK("ENTER\n"); |
4043 | ||
f046519f TH |
4044 | /* reset complete, clear SError */ |
4045 | if (!sata_scr_read(link, SCR_ERROR, &serror)) | |
4046 | sata_scr_write(link, SCR_ERROR, serror); | |
4047 | ||
c2bd5804 | 4048 | /* print link status */ |
936fd732 | 4049 | sata_print_link_status(link); |
c2bd5804 | 4050 | |
c2bd5804 TH |
4051 | DPRINTK("EXIT\n"); |
4052 | } | |
4053 | ||
623a3128 TH |
4054 | /** |
4055 | * ata_dev_same_device - Determine whether new ID matches configured device | |
623a3128 TH |
4056 | * @dev: device to compare against |
4057 | * @new_class: class of the new device | |
4058 | * @new_id: IDENTIFY page of the new device | |
4059 | * | |
4060 | * Compare @new_class and @new_id against @dev and determine | |
4061 | * whether @dev is the device indicated by @new_class and | |
4062 | * @new_id. | |
4063 | * | |
4064 | * LOCKING: | |
4065 | * None. | |
4066 | * | |
4067 | * RETURNS: | |
4068 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
4069 | */ | |
3373efd8 TH |
4070 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
4071 | const u16 *new_id) | |
623a3128 TH |
4072 | { |
4073 | const u16 *old_id = dev->id; | |
a0cf733b TH |
4074 | unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
4075 | unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; | |
623a3128 TH |
4076 | |
4077 | if (dev->class != new_class) { | |
f15a1daf TH |
4078 | ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", |
4079 | dev->class, new_class); | |
623a3128 TH |
4080 | return 0; |
4081 | } | |
4082 | ||
a0cf733b TH |
4083 | ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
4084 | ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); | |
4085 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); | |
4086 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); | |
623a3128 TH |
4087 | |
4088 | if (strcmp(model[0], model[1])) { | |
f15a1daf TH |
4089 | ata_dev_printk(dev, KERN_INFO, "model number mismatch " |
4090 | "'%s' != '%s'\n", model[0], model[1]); | |
623a3128 TH |
4091 | return 0; |
4092 | } | |
4093 | ||
4094 | if (strcmp(serial[0], serial[1])) { | |
f15a1daf TH |
4095 | ata_dev_printk(dev, KERN_INFO, "serial number mismatch " |
4096 | "'%s' != '%s'\n", serial[0], serial[1]); | |
623a3128 TH |
4097 | return 0; |
4098 | } | |
4099 | ||
623a3128 TH |
4100 | return 1; |
4101 | } | |
4102 | ||
4103 | /** | |
fe30911b | 4104 | * ata_dev_reread_id - Re-read IDENTIFY data |
3fae450c | 4105 | * @dev: target ATA device |
bff04647 | 4106 | * @readid_flags: read ID flags |
623a3128 TH |
4107 | * |
4108 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
4109 | * the port. | |
4110 | * | |
4111 | * LOCKING: | |
4112 | * Kernel thread context (may sleep) | |
4113 | * | |
4114 | * RETURNS: | |
4115 | * 0 on success, negative errno otherwise | |
4116 | */ | |
fe30911b | 4117 | int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) |
623a3128 | 4118 | { |
5eb45c02 | 4119 | unsigned int class = dev->class; |
9af5c9c9 | 4120 | u16 *id = (void *)dev->link->ap->sector_buf; |
623a3128 TH |
4121 | int rc; |
4122 | ||
fe635c7e | 4123 | /* read ID data */ |
bff04647 | 4124 | rc = ata_dev_read_id(dev, &class, readid_flags, id); |
623a3128 | 4125 | if (rc) |
fe30911b | 4126 | return rc; |
623a3128 TH |
4127 | |
4128 | /* is the device still there? */ | |
fe30911b TH |
4129 | if (!ata_dev_same_device(dev, class, id)) |
4130 | return -ENODEV; | |
623a3128 | 4131 | |
fe635c7e | 4132 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
fe30911b TH |
4133 | return 0; |
4134 | } | |
4135 | ||
4136 | /** | |
4137 | * ata_dev_revalidate - Revalidate ATA device | |
4138 | * @dev: device to revalidate | |
422c9daa | 4139 | * @new_class: new class code |
fe30911b TH |
4140 | * @readid_flags: read ID flags |
4141 | * | |
4142 | * Re-read IDENTIFY page, make sure @dev is still attached to the | |
4143 | * port and reconfigure it according to the new IDENTIFY page. | |
4144 | * | |
4145 | * LOCKING: | |
4146 | * Kernel thread context (may sleep) | |
4147 | * | |
4148 | * RETURNS: | |
4149 | * 0 on success, negative errno otherwise | |
4150 | */ | |
422c9daa TH |
4151 | int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, |
4152 | unsigned int readid_flags) | |
fe30911b | 4153 | { |
6ddcd3b0 | 4154 | u64 n_sectors = dev->n_sectors; |
5920dadf | 4155 | u64 n_native_sectors = dev->n_native_sectors; |
fe30911b TH |
4156 | int rc; |
4157 | ||
4158 | if (!ata_dev_enabled(dev)) | |
4159 | return -ENODEV; | |
4160 | ||
422c9daa TH |
4161 | /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ |
4162 | if (ata_class_enabled(new_class) && | |
f0d0613d BP |
4163 | new_class != ATA_DEV_ATA && |
4164 | new_class != ATA_DEV_ATAPI && | |
4165 | new_class != ATA_DEV_SEMB) { | |
422c9daa TH |
4166 | ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n", |
4167 | dev->class, new_class); | |
4168 | rc = -ENODEV; | |
4169 | goto fail; | |
4170 | } | |
4171 | ||
fe30911b TH |
4172 | /* re-read ID */ |
4173 | rc = ata_dev_reread_id(dev, readid_flags); | |
4174 | if (rc) | |
4175 | goto fail; | |
623a3128 TH |
4176 | |
4177 | /* configure device according to the new ID */ | |
efdaedc4 | 4178 | rc = ata_dev_configure(dev); |
6ddcd3b0 TH |
4179 | if (rc) |
4180 | goto fail; | |
4181 | ||
4182 | /* verify n_sectors hasn't changed */ | |
b54eebd6 TH |
4183 | if (dev->class == ATA_DEV_ATA && n_sectors && |
4184 | dev->n_sectors != n_sectors) { | |
5920dadf | 4185 | ata_dev_printk(dev, KERN_WARNING, "n_sectors mismatch " |
6ddcd3b0 TH |
4186 | "%llu != %llu\n", |
4187 | (unsigned long long)n_sectors, | |
4188 | (unsigned long long)dev->n_sectors); | |
5920dadf TH |
4189 | /* |
4190 | * Something could have caused HPA to be unlocked | |
4191 | * involuntarily. If n_native_sectors hasn't changed | |
4192 | * and the new size matches it, keep the device. | |
4193 | */ | |
4194 | if (dev->n_native_sectors == n_native_sectors && | |
4195 | dev->n_sectors > n_sectors && | |
4196 | dev->n_sectors == n_native_sectors) { | |
4197 | ata_dev_printk(dev, KERN_WARNING, | |
4198 | "new n_sectors matches native, probably " | |
4199 | "late HPA unlock, continuing\n"); | |
4200 | /* keep using the old n_sectors */ | |
4201 | dev->n_sectors = n_sectors; | |
4202 | } else { | |
4203 | /* restore original n_[native]_sectors and fail */ | |
4204 | dev->n_native_sectors = n_native_sectors; | |
4205 | dev->n_sectors = n_sectors; | |
4206 | rc = -ENODEV; | |
4207 | goto fail; | |
4208 | } | |
6ddcd3b0 TH |
4209 | } |
4210 | ||
4211 | return 0; | |
623a3128 TH |
4212 | |
4213 | fail: | |
f15a1daf | 4214 | ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); |
623a3128 TH |
4215 | return rc; |
4216 | } | |
4217 | ||
6919a0a6 AC |
4218 | struct ata_blacklist_entry { |
4219 | const char *model_num; | |
4220 | const char *model_rev; | |
4221 | unsigned long horkage; | |
4222 | }; | |
4223 | ||
4224 | static const struct ata_blacklist_entry ata_device_blacklist [] = { | |
4225 | /* Devices with DMA related problems under Linux */ | |
4226 | { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, | |
4227 | { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, | |
4228 | { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, | |
4229 | { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, | |
4230 | { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, | |
4231 | { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, | |
4232 | { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, | |
4233 | { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, | |
4234 | { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, | |
4235 | { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, | |
4236 | { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, | |
4237 | { "CRD-84", NULL, ATA_HORKAGE_NODMA }, | |
4238 | { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, | |
4239 | { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, | |
4240 | { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, | |
4241 | { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, | |
4242 | { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, | |
4243 | { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, | |
4244 | { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, | |
4245 | { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, | |
4246 | { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, | |
4247 | { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, | |
4248 | { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, | |
4249 | { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, | |
4250 | { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, | |
4251 | { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, | |
6919a0a6 AC |
4252 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
4253 | { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, | |
2dcb407e | 4254 | { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA }, |
39f19886 | 4255 | { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, |
3af9a77a | 4256 | /* Odd clown on sil3726/4726 PMPs */ |
50af2fa1 | 4257 | { "Config Disk", NULL, ATA_HORKAGE_DISABLE }, |
6919a0a6 | 4258 | |
18d6e9d5 | 4259 | /* Weird ATAPI devices */ |
40a1d531 | 4260 | { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, |
6a87e42e | 4261 | { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA }, |
18d6e9d5 | 4262 | |
6919a0a6 AC |
4263 | /* Devices we expect to fail diagnostics */ |
4264 | ||
4265 | /* Devices where NCQ should be avoided */ | |
4266 | /* NCQ is slow */ | |
2dcb407e | 4267 | { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, |
459ad688 | 4268 | { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, |
09125ea6 TH |
4269 | /* http://thread.gmane.org/gmane.linux.ide/14907 */ |
4270 | { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, | |
7acfaf30 | 4271 | /* NCQ is broken */ |
539cc7c7 | 4272 | { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, |
0e3dbc01 | 4273 | { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, |
da6f0ec2 | 4274 | { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, |
e41bd3e8 | 4275 | { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ }, |
5ccfca97 | 4276 | { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ }, |
539cc7c7 | 4277 | |
ac70a964 | 4278 | /* Seagate NCQ + FLUSH CACHE firmware bug */ |
d10d491f | 4279 | { "ST31500341AS", "SD15", ATA_HORKAGE_NONCQ | |
ac70a964 | 4280 | ATA_HORKAGE_FIRMWARE_WARN }, |
d10d491f | 4281 | { "ST31500341AS", "SD16", ATA_HORKAGE_NONCQ | |
ac70a964 | 4282 | ATA_HORKAGE_FIRMWARE_WARN }, |
d10d491f | 4283 | { "ST31500341AS", "SD17", ATA_HORKAGE_NONCQ | |
ac70a964 | 4284 | ATA_HORKAGE_FIRMWARE_WARN }, |
d10d491f | 4285 | { "ST31500341AS", "SD18", ATA_HORKAGE_NONCQ | |
ac70a964 | 4286 | ATA_HORKAGE_FIRMWARE_WARN }, |
d10d491f | 4287 | { "ST31500341AS", "SD19", ATA_HORKAGE_NONCQ | |
ac70a964 | 4288 | ATA_HORKAGE_FIRMWARE_WARN }, |
d10d491f TH |
4289 | |
4290 | { "ST31000333AS", "SD15", ATA_HORKAGE_NONCQ | | |
4291 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4292 | { "ST31000333AS", "SD16", ATA_HORKAGE_NONCQ | | |
4293 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4294 | { "ST31000333AS", "SD17", ATA_HORKAGE_NONCQ | | |
4295 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4296 | { "ST31000333AS", "SD18", ATA_HORKAGE_NONCQ | | |
4297 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4298 | { "ST31000333AS", "SD19", ATA_HORKAGE_NONCQ | | |
4299 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4300 | ||
4301 | { "ST3640623AS", "SD15", ATA_HORKAGE_NONCQ | | |
4302 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4303 | { "ST3640623AS", "SD16", ATA_HORKAGE_NONCQ | | |
4304 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4305 | { "ST3640623AS", "SD17", ATA_HORKAGE_NONCQ | | |
4306 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4307 | { "ST3640623AS", "SD18", ATA_HORKAGE_NONCQ | | |
4308 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4309 | { "ST3640623AS", "SD19", ATA_HORKAGE_NONCQ | | |
4310 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4311 | ||
4312 | { "ST3640323AS", "SD15", ATA_HORKAGE_NONCQ | | |
4313 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4314 | { "ST3640323AS", "SD16", ATA_HORKAGE_NONCQ | | |
4315 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4316 | { "ST3640323AS", "SD17", ATA_HORKAGE_NONCQ | | |
4317 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4318 | { "ST3640323AS", "SD18", ATA_HORKAGE_NONCQ | | |
4319 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4320 | { "ST3640323AS", "SD19", ATA_HORKAGE_NONCQ | | |
4321 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4322 | ||
4323 | { "ST3320813AS", "SD15", ATA_HORKAGE_NONCQ | | |
4324 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4325 | { "ST3320813AS", "SD16", ATA_HORKAGE_NONCQ | | |
4326 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4327 | { "ST3320813AS", "SD17", ATA_HORKAGE_NONCQ | | |
4328 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4329 | { "ST3320813AS", "SD18", ATA_HORKAGE_NONCQ | | |
4330 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4331 | { "ST3320813AS", "SD19", ATA_HORKAGE_NONCQ | | |
4332 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4333 | ||
4334 | { "ST3320613AS", "SD15", ATA_HORKAGE_NONCQ | | |
4335 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4336 | { "ST3320613AS", "SD16", ATA_HORKAGE_NONCQ | | |
4337 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4338 | { "ST3320613AS", "SD17", ATA_HORKAGE_NONCQ | | |
4339 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4340 | { "ST3320613AS", "SD18", ATA_HORKAGE_NONCQ | | |
4341 | ATA_HORKAGE_FIRMWARE_WARN }, | |
4342 | { "ST3320613AS", "SD19", ATA_HORKAGE_NONCQ | | |
ac70a964 TH |
4343 | ATA_HORKAGE_FIRMWARE_WARN }, |
4344 | ||
36e337d0 RH |
4345 | /* Blacklist entries taken from Silicon Image 3124/3132 |
4346 | Windows driver .inf file - also several Linux problem reports */ | |
4347 | { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, | |
4348 | { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, | |
4349 | { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, | |
6919a0a6 | 4350 | |
16c55b03 TH |
4351 | /* devices which puke on READ_NATIVE_MAX */ |
4352 | { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, | |
4353 | { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, | |
4354 | { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, | |
4355 | { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, | |
6919a0a6 | 4356 | |
7831387b TH |
4357 | /* this one allows HPA unlocking but fails IOs on the area */ |
4358 | { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA }, | |
4359 | ||
93328e11 AC |
4360 | /* Devices which report 1 sector over size HPA */ |
4361 | { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
4362 | { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
b152fcd3 | 4363 | { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, }, |
93328e11 | 4364 | |
6bbfd53d AC |
4365 | /* Devices which get the IVB wrong */ |
4366 | { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, }, | |
a79067e5 AC |
4367 | /* Maybe we should just blacklist TSSTcorp... */ |
4368 | { "TSSTcorp CDDVDW SH-S202H", "SB00", ATA_HORKAGE_IVB, }, | |
4369 | { "TSSTcorp CDDVDW SH-S202H", "SB01", ATA_HORKAGE_IVB, }, | |
6bbfd53d | 4370 | { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, }, |
e9f33406 PM |
4371 | { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, }, |
4372 | { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, }, | |
4373 | { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, }, | |
6bbfd53d | 4374 | |
9ce8e307 JA |
4375 | /* Devices that do not need bridging limits applied */ |
4376 | { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, }, | |
4377 | ||
9062712f TH |
4378 | /* Devices which aren't very happy with higher link speeds */ |
4379 | { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, }, | |
4380 | ||
d0cb43b3 TH |
4381 | /* |
4382 | * Devices which choke on SETXFER. Applies only if both the | |
4383 | * device and controller are SATA. | |
4384 | */ | |
4385 | { "PIONEER DVD-RW DVRTD08", "1.00", ATA_HORKAGE_NOSETXFER }, | |
4386 | ||
6919a0a6 AC |
4387 | /* End Marker */ |
4388 | { } | |
1da177e4 | 4389 | }; |
2e9edbf8 | 4390 | |
741b7763 | 4391 | static int strn_pattern_cmp(const char *patt, const char *name, int wildchar) |
539cc7c7 JG |
4392 | { |
4393 | const char *p; | |
4394 | int len; | |
4395 | ||
4396 | /* | |
4397 | * check for trailing wildcard: *\0 | |
4398 | */ | |
4399 | p = strchr(patt, wildchar); | |
4400 | if (p && ((*(p + 1)) == 0)) | |
4401 | len = p - patt; | |
317b50b8 | 4402 | else { |
539cc7c7 | 4403 | len = strlen(name); |
317b50b8 AP |
4404 | if (!len) { |
4405 | if (!*patt) | |
4406 | return 0; | |
4407 | return -1; | |
4408 | } | |
4409 | } | |
539cc7c7 JG |
4410 | |
4411 | return strncmp(patt, name, len); | |
4412 | } | |
4413 | ||
75683fe7 | 4414 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev) |
1da177e4 | 4415 | { |
8bfa79fc TH |
4416 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
4417 | unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; | |
6919a0a6 | 4418 | const struct ata_blacklist_entry *ad = ata_device_blacklist; |
3a778275 | 4419 | |
8bfa79fc TH |
4420 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
4421 | ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); | |
1da177e4 | 4422 | |
6919a0a6 | 4423 | while (ad->model_num) { |
539cc7c7 | 4424 | if (!strn_pattern_cmp(ad->model_num, model_num, '*')) { |
6919a0a6 AC |
4425 | if (ad->model_rev == NULL) |
4426 | return ad->horkage; | |
539cc7c7 | 4427 | if (!strn_pattern_cmp(ad->model_rev, model_rev, '*')) |
6919a0a6 | 4428 | return ad->horkage; |
f4b15fef | 4429 | } |
6919a0a6 | 4430 | ad++; |
f4b15fef | 4431 | } |
1da177e4 LT |
4432 | return 0; |
4433 | } | |
4434 | ||
6919a0a6 AC |
4435 | static int ata_dma_blacklisted(const struct ata_device *dev) |
4436 | { | |
4437 | /* We don't support polling DMA. | |
4438 | * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) | |
4439 | * if the LLDD handles only interrupts in the HSM_ST_LAST state. | |
4440 | */ | |
9af5c9c9 | 4441 | if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && |
6919a0a6 AC |
4442 | (dev->flags & ATA_DFLAG_CDB_INTR)) |
4443 | return 1; | |
75683fe7 | 4444 | return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; |
6919a0a6 AC |
4445 | } |
4446 | ||
6bbfd53d AC |
4447 | /** |
4448 | * ata_is_40wire - check drive side detection | |
4449 | * @dev: device | |
4450 | * | |
4451 | * Perform drive side detection decoding, allowing for device vendors | |
4452 | * who can't follow the documentation. | |
4453 | */ | |
4454 | ||
4455 | static int ata_is_40wire(struct ata_device *dev) | |
4456 | { | |
4457 | if (dev->horkage & ATA_HORKAGE_IVB) | |
4458 | return ata_drive_40wire_relaxed(dev->id); | |
4459 | return ata_drive_40wire(dev->id); | |
4460 | } | |
4461 | ||
15a5551c AC |
4462 | /** |
4463 | * cable_is_40wire - 40/80/SATA decider | |
4464 | * @ap: port to consider | |
4465 | * | |
4466 | * This function encapsulates the policy for speed management | |
4467 | * in one place. At the moment we don't cache the result but | |
4468 | * there is a good case for setting ap->cbl to the result when | |
4469 | * we are called with unknown cables (and figuring out if it | |
4470 | * impacts hotplug at all). | |
4471 | * | |
4472 | * Return 1 if the cable appears to be 40 wire. | |
4473 | */ | |
4474 | ||
4475 | static int cable_is_40wire(struct ata_port *ap) | |
4476 | { | |
4477 | struct ata_link *link; | |
4478 | struct ata_device *dev; | |
4479 | ||
4a9c7b33 | 4480 | /* If the controller thinks we are 40 wire, we are. */ |
15a5551c AC |
4481 | if (ap->cbl == ATA_CBL_PATA40) |
4482 | return 1; | |
4a9c7b33 TH |
4483 | |
4484 | /* If the controller thinks we are 80 wire, we are. */ | |
15a5551c AC |
4485 | if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA) |
4486 | return 0; | |
4a9c7b33 TH |
4487 | |
4488 | /* If the system is known to be 40 wire short cable (eg | |
4489 | * laptop), then we allow 80 wire modes even if the drive | |
4490 | * isn't sure. | |
4491 | */ | |
f792068e AC |
4492 | if (ap->cbl == ATA_CBL_PATA40_SHORT) |
4493 | return 0; | |
4a9c7b33 TH |
4494 | |
4495 | /* If the controller doesn't know, we scan. | |
4496 | * | |
4497 | * Note: We look for all 40 wire detects at this point. Any | |
4498 | * 80 wire detect is taken to be 80 wire cable because | |
4499 | * - in many setups only the one drive (slave if present) will | |
4500 | * give a valid detect | |
4501 | * - if you have a non detect capable drive you don't want it | |
4502 | * to colour the choice | |
4503 | */ | |
1eca4365 TH |
4504 | ata_for_each_link(link, ap, EDGE) { |
4505 | ata_for_each_dev(dev, link, ENABLED) { | |
4506 | if (!ata_is_40wire(dev)) | |
15a5551c AC |
4507 | return 0; |
4508 | } | |
4509 | } | |
4510 | return 1; | |
4511 | } | |
4512 | ||
a6d5a51c TH |
4513 | /** |
4514 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
a6d5a51c TH |
4515 | * @dev: Device to compute xfermask for |
4516 | * | |
acf356b1 TH |
4517 | * Compute supported xfermask of @dev and store it in |
4518 | * dev->*_mask. This function is responsible for applying all | |
4519 | * known limits including host controller limits, device | |
4520 | * blacklist, etc... | |
a6d5a51c TH |
4521 | * |
4522 | * LOCKING: | |
4523 | * None. | |
a6d5a51c | 4524 | */ |
3373efd8 | 4525 | static void ata_dev_xfermask(struct ata_device *dev) |
1da177e4 | 4526 | { |
9af5c9c9 TH |
4527 | struct ata_link *link = dev->link; |
4528 | struct ata_port *ap = link->ap; | |
cca3974e | 4529 | struct ata_host *host = ap->host; |
a6d5a51c | 4530 | unsigned long xfer_mask; |
1da177e4 | 4531 | |
37deecb5 | 4532 | /* controller modes available */ |
565083e1 TH |
4533 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
4534 | ap->mwdma_mask, ap->udma_mask); | |
4535 | ||
8343f889 | 4536 | /* drive modes available */ |
37deecb5 TH |
4537 | xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
4538 | dev->mwdma_mask, dev->udma_mask); | |
4539 | xfer_mask &= ata_id_xfermask(dev->id); | |
565083e1 | 4540 | |
b352e57d AC |
4541 | /* |
4542 | * CFA Advanced TrueIDE timings are not allowed on a shared | |
4543 | * cable | |
4544 | */ | |
4545 | if (ata_dev_pair(dev)) { | |
4546 | /* No PIO5 or PIO6 */ | |
4547 | xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); | |
4548 | /* No MWDMA3 or MWDMA 4 */ | |
4549 | xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); | |
4550 | } | |
4551 | ||
37deecb5 TH |
4552 | if (ata_dma_blacklisted(dev)) { |
4553 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
f15a1daf TH |
4554 | ata_dev_printk(dev, KERN_WARNING, |
4555 | "device is on DMA blacklist, disabling DMA\n"); | |
37deecb5 | 4556 | } |
a6d5a51c | 4557 | |
14d66ab7 | 4558 | if ((host->flags & ATA_HOST_SIMPLEX) && |
2dcb407e | 4559 | host->simplex_claimed && host->simplex_claimed != ap) { |
37deecb5 TH |
4560 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
4561 | ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " | |
4562 | "other device, disabling DMA\n"); | |
5444a6f4 | 4563 | } |
565083e1 | 4564 | |
e424675f JG |
4565 | if (ap->flags & ATA_FLAG_NO_IORDY) |
4566 | xfer_mask &= ata_pio_mask_no_iordy(dev); | |
4567 | ||
5444a6f4 | 4568 | if (ap->ops->mode_filter) |
a76b62ca | 4569 | xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
5444a6f4 | 4570 | |
8343f889 RH |
4571 | /* Apply cable rule here. Don't apply it early because when |
4572 | * we handle hot plug the cable type can itself change. | |
4573 | * Check this last so that we know if the transfer rate was | |
4574 | * solely limited by the cable. | |
4575 | * Unknown or 80 wire cables reported host side are checked | |
4576 | * drive side as well. Cases where we know a 40wire cable | |
4577 | * is used safely for 80 are not checked here. | |
4578 | */ | |
4579 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) | |
4580 | /* UDMA/44 or higher would be available */ | |
15a5551c | 4581 | if (cable_is_40wire(ap)) { |
2dcb407e | 4582 | ata_dev_printk(dev, KERN_WARNING, |
8343f889 RH |
4583 | "limited to UDMA/33 due to 40-wire cable\n"); |
4584 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); | |
4585 | } | |
4586 | ||
565083e1 TH |
4587 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
4588 | &dev->mwdma_mask, &dev->udma_mask); | |
1da177e4 LT |
4589 | } |
4590 | ||
1da177e4 LT |
4591 | /** |
4592 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
1da177e4 LT |
4593 | * @dev: Device to which command will be sent |
4594 | * | |
780a87f7 JG |
4595 | * Issue SET FEATURES - XFER MODE command to device @dev |
4596 | * on port @ap. | |
4597 | * | |
1da177e4 | 4598 | * LOCKING: |
0cba632b | 4599 | * PCI/etc. bus probe sem. |
83206a29 TH |
4600 | * |
4601 | * RETURNS: | |
4602 | * 0 on success, AC_ERR_* mask otherwise. | |
1da177e4 LT |
4603 | */ |
4604 | ||
3373efd8 | 4605 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
1da177e4 | 4606 | { |
a0123703 | 4607 | struct ata_taskfile tf; |
83206a29 | 4608 | unsigned int err_mask; |
1da177e4 LT |
4609 | |
4610 | /* set up set-features taskfile */ | |
4611 | DPRINTK("set features - xfer mode\n"); | |
4612 | ||
464cf177 TH |
4613 | /* Some controllers and ATAPI devices show flaky interrupt |
4614 | * behavior after setting xfer mode. Use polling instead. | |
4615 | */ | |
3373efd8 | 4616 | ata_tf_init(dev, &tf); |
a0123703 TH |
4617 | tf.command = ATA_CMD_SET_FEATURES; |
4618 | tf.feature = SETFEATURES_XFER; | |
464cf177 | 4619 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; |
a0123703 | 4620 | tf.protocol = ATA_PROT_NODATA; |
b9f8ab2d | 4621 | /* If we are using IORDY we must send the mode setting command */ |
11b7becc JG |
4622 | if (ata_pio_need_iordy(dev)) |
4623 | tf.nsect = dev->xfer_mode; | |
b9f8ab2d AC |
4624 | /* If the device has IORDY and the controller does not - turn it off */ |
4625 | else if (ata_id_has_iordy(dev->id)) | |
11b7becc | 4626 | tf.nsect = 0x01; |
b9f8ab2d AC |
4627 | else /* In the ancient relic department - skip all of this */ |
4628 | return 0; | |
1da177e4 | 4629 | |
2b789108 | 4630 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
9f45cbd3 KCA |
4631 | |
4632 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
4633 | return err_mask; | |
4634 | } | |
9f45cbd3 | 4635 | /** |
218f3d30 | 4636 | * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES |
9f45cbd3 KCA |
4637 | * @dev: Device to which command will be sent |
4638 | * @enable: Whether to enable or disable the feature | |
218f3d30 | 4639 | * @feature: The sector count represents the feature to set |
9f45cbd3 KCA |
4640 | * |
4641 | * Issue SET FEATURES - SATA FEATURES command to device @dev | |
218f3d30 | 4642 | * on port @ap with sector count |
9f45cbd3 KCA |
4643 | * |
4644 | * LOCKING: | |
4645 | * PCI/etc. bus probe sem. | |
4646 | * | |
4647 | * RETURNS: | |
4648 | * 0 on success, AC_ERR_* mask otherwise. | |
4649 | */ | |
218f3d30 JG |
4650 | static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, |
4651 | u8 feature) | |
9f45cbd3 KCA |
4652 | { |
4653 | struct ata_taskfile tf; | |
4654 | unsigned int err_mask; | |
4655 | ||
4656 | /* set up set-features taskfile */ | |
4657 | DPRINTK("set features - SATA features\n"); | |
4658 | ||
4659 | ata_tf_init(dev, &tf); | |
4660 | tf.command = ATA_CMD_SET_FEATURES; | |
4661 | tf.feature = enable; | |
4662 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4663 | tf.protocol = ATA_PROT_NODATA; | |
218f3d30 | 4664 | tf.nsect = feature; |
9f45cbd3 | 4665 | |
2b789108 | 4666 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
1da177e4 | 4667 | |
83206a29 TH |
4668 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4669 | return err_mask; | |
1da177e4 LT |
4670 | } |
4671 | ||
8bf62ece AL |
4672 | /** |
4673 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
8bf62ece | 4674 | * @dev: Device to which command will be sent |
e2a7f77a RD |
4675 | * @heads: Number of heads (taskfile parameter) |
4676 | * @sectors: Number of sectors (taskfile parameter) | |
8bf62ece AL |
4677 | * |
4678 | * LOCKING: | |
6aff8f1f TH |
4679 | * Kernel thread context (may sleep) |
4680 | * | |
4681 | * RETURNS: | |
4682 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece | 4683 | */ |
3373efd8 TH |
4684 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
4685 | u16 heads, u16 sectors) | |
8bf62ece | 4686 | { |
a0123703 | 4687 | struct ata_taskfile tf; |
6aff8f1f | 4688 | unsigned int err_mask; |
8bf62ece AL |
4689 | |
4690 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
4691 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
00b6f5e9 | 4692 | return AC_ERR_INVALID; |
8bf62ece AL |
4693 | |
4694 | /* set up init dev params taskfile */ | |
4695 | DPRINTK("init dev params \n"); | |
4696 | ||
3373efd8 | 4697 | ata_tf_init(dev, &tf); |
a0123703 TH |
4698 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
4699 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4700 | tf.protocol = ATA_PROT_NODATA; | |
4701 | tf.nsect = sectors; | |
4702 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 4703 | |
2b789108 | 4704 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
18b2466c AC |
4705 | /* A clean abort indicates an original or just out of spec drive |
4706 | and we should continue as we issue the setup based on the | |
4707 | drive reported working geometry */ | |
4708 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
4709 | err_mask = 0; | |
8bf62ece | 4710 | |
6aff8f1f TH |
4711 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4712 | return err_mask; | |
8bf62ece AL |
4713 | } |
4714 | ||
1da177e4 | 4715 | /** |
0cba632b JG |
4716 | * ata_sg_clean - Unmap DMA memory associated with command |
4717 | * @qc: Command containing DMA memory to be released | |
4718 | * | |
4719 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
4720 | * |
4721 | * LOCKING: | |
cca3974e | 4722 | * spin_lock_irqsave(host lock) |
1da177e4 | 4723 | */ |
70e6ad0c | 4724 | void ata_sg_clean(struct ata_queued_cmd *qc) |
1da177e4 LT |
4725 | { |
4726 | struct ata_port *ap = qc->ap; | |
ff2aeb1e | 4727 | struct scatterlist *sg = qc->sg; |
1da177e4 LT |
4728 | int dir = qc->dma_dir; |
4729 | ||
efcb3cf7 | 4730 | WARN_ON_ONCE(sg == NULL); |
1da177e4 | 4731 | |
dde20207 | 4732 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 4733 | |
dde20207 | 4734 | if (qc->n_elem) |
5825627c | 4735 | dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir); |
1da177e4 LT |
4736 | |
4737 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
ff2aeb1e | 4738 | qc->sg = NULL; |
1da177e4 LT |
4739 | } |
4740 | ||
1da177e4 | 4741 | /** |
5895ef9a | 4742 | * atapi_check_dma - Check whether ATAPI DMA can be supported |
1da177e4 LT |
4743 | * @qc: Metadata associated with taskfile to check |
4744 | * | |
780a87f7 JG |
4745 | * Allow low-level driver to filter ATA PACKET commands, returning |
4746 | * a status indicating whether or not it is OK to use DMA for the | |
4747 | * supplied PACKET command. | |
4748 | * | |
1da177e4 | 4749 | * LOCKING: |
624d5c51 TH |
4750 | * spin_lock_irqsave(host lock) |
4751 | * | |
4752 | * RETURNS: 0 when ATAPI DMA can be used | |
4753 | * nonzero otherwise | |
4754 | */ | |
5895ef9a | 4755 | int atapi_check_dma(struct ata_queued_cmd *qc) |
624d5c51 TH |
4756 | { |
4757 | struct ata_port *ap = qc->ap; | |
71601958 | 4758 | |
624d5c51 TH |
4759 | /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a |
4760 | * few ATAPI devices choke on such DMA requests. | |
4761 | */ | |
6a87e42e TH |
4762 | if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) && |
4763 | unlikely(qc->nbytes & 15)) | |
624d5c51 | 4764 | return 1; |
e2cec771 | 4765 | |
624d5c51 TH |
4766 | if (ap->ops->check_atapi_dma) |
4767 | return ap->ops->check_atapi_dma(qc); | |
e2cec771 | 4768 | |
624d5c51 TH |
4769 | return 0; |
4770 | } | |
1da177e4 | 4771 | |
624d5c51 TH |
4772 | /** |
4773 | * ata_std_qc_defer - Check whether a qc needs to be deferred | |
4774 | * @qc: ATA command in question | |
4775 | * | |
4776 | * Non-NCQ commands cannot run with any other command, NCQ or | |
4777 | * not. As upper layer only knows the queue depth, we are | |
4778 | * responsible for maintaining exclusion. This function checks | |
4779 | * whether a new command @qc can be issued. | |
4780 | * | |
4781 | * LOCKING: | |
4782 | * spin_lock_irqsave(host lock) | |
4783 | * | |
4784 | * RETURNS: | |
4785 | * ATA_DEFER_* if deferring is needed, 0 otherwise. | |
4786 | */ | |
4787 | int ata_std_qc_defer(struct ata_queued_cmd *qc) | |
4788 | { | |
4789 | struct ata_link *link = qc->dev->link; | |
e2cec771 | 4790 | |
624d5c51 TH |
4791 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
4792 | if (!ata_tag_valid(link->active_tag)) | |
4793 | return 0; | |
4794 | } else { | |
4795 | if (!ata_tag_valid(link->active_tag) && !link->sactive) | |
4796 | return 0; | |
4797 | } | |
e2cec771 | 4798 | |
624d5c51 TH |
4799 | return ATA_DEFER_LINK; |
4800 | } | |
6912ccd5 | 4801 | |
624d5c51 | 4802 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
1da177e4 | 4803 | |
624d5c51 TH |
4804 | /** |
4805 | * ata_sg_init - Associate command with scatter-gather table. | |
4806 | * @qc: Command to be associated | |
4807 | * @sg: Scatter-gather table. | |
4808 | * @n_elem: Number of elements in s/g table. | |
4809 | * | |
4810 | * Initialize the data-related elements of queued_cmd @qc | |
4811 | * to point to a scatter-gather table @sg, containing @n_elem | |
4812 | * elements. | |
4813 | * | |
4814 | * LOCKING: | |
4815 | * spin_lock_irqsave(host lock) | |
4816 | */ | |
4817 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, | |
4818 | unsigned int n_elem) | |
4819 | { | |
4820 | qc->sg = sg; | |
4821 | qc->n_elem = n_elem; | |
4822 | qc->cursg = qc->sg; | |
4823 | } | |
bb5cb290 | 4824 | |
624d5c51 TH |
4825 | /** |
4826 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. | |
4827 | * @qc: Command with scatter-gather table to be mapped. | |
4828 | * | |
4829 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
4830 | * | |
4831 | * LOCKING: | |
4832 | * spin_lock_irqsave(host lock) | |
4833 | * | |
4834 | * RETURNS: | |
4835 | * Zero on success, negative on error. | |
4836 | * | |
4837 | */ | |
4838 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
4839 | { | |
4840 | struct ata_port *ap = qc->ap; | |
4841 | unsigned int n_elem; | |
1da177e4 | 4842 | |
624d5c51 | 4843 | VPRINTK("ENTER, ata%u\n", ap->print_id); |
e2cec771 | 4844 | |
624d5c51 TH |
4845 | n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); |
4846 | if (n_elem < 1) | |
4847 | return -1; | |
bb5cb290 | 4848 | |
624d5c51 | 4849 | DPRINTK("%d sg elements mapped\n", n_elem); |
5825627c | 4850 | qc->orig_n_elem = qc->n_elem; |
624d5c51 TH |
4851 | qc->n_elem = n_elem; |
4852 | qc->flags |= ATA_QCFLAG_DMAMAP; | |
1da177e4 | 4853 | |
624d5c51 | 4854 | return 0; |
1da177e4 LT |
4855 | } |
4856 | ||
624d5c51 TH |
4857 | /** |
4858 | * swap_buf_le16 - swap halves of 16-bit words in place | |
4859 | * @buf: Buffer to swap | |
4860 | * @buf_words: Number of 16-bit words in buffer. | |
4861 | * | |
4862 | * Swap halves of 16-bit words if needed to convert from | |
4863 | * little-endian byte order to native cpu byte order, or | |
4864 | * vice-versa. | |
4865 | * | |
4866 | * LOCKING: | |
4867 | * Inherited from caller. | |
4868 | */ | |
4869 | void swap_buf_le16(u16 *buf, unsigned int buf_words) | |
8061f5f0 | 4870 | { |
624d5c51 TH |
4871 | #ifdef __BIG_ENDIAN |
4872 | unsigned int i; | |
8061f5f0 | 4873 | |
624d5c51 TH |
4874 | for (i = 0; i < buf_words; i++) |
4875 | buf[i] = le16_to_cpu(buf[i]); | |
4876 | #endif /* __BIG_ENDIAN */ | |
8061f5f0 TH |
4877 | } |
4878 | ||
8a8bc223 TH |
4879 | /** |
4880 | * ata_qc_new - Request an available ATA command, for queueing | |
5eb66fe0 | 4881 | * @ap: target port |
8a8bc223 TH |
4882 | * |
4883 | * LOCKING: | |
4884 | * None. | |
4885 | */ | |
4886 | ||
4887 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
4888 | { | |
4889 | struct ata_queued_cmd *qc = NULL; | |
4890 | unsigned int i; | |
4891 | ||
4892 | /* no command while frozen */ | |
4893 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) | |
4894 | return NULL; | |
4895 | ||
4896 | /* the last tag is reserved for internal command. */ | |
4897 | for (i = 0; i < ATA_MAX_QUEUE - 1; i++) | |
4898 | if (!test_and_set_bit(i, &ap->qc_allocated)) { | |
4899 | qc = __ata_qc_from_tag(ap, i); | |
4900 | break; | |
4901 | } | |
4902 | ||
4903 | if (qc) | |
4904 | qc->tag = i; | |
4905 | ||
4906 | return qc; | |
4907 | } | |
4908 | ||
1da177e4 LT |
4909 | /** |
4910 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
1da177e4 LT |
4911 | * @dev: Device from whom we request an available command structure |
4912 | * | |
4913 | * LOCKING: | |
0cba632b | 4914 | * None. |
1da177e4 LT |
4915 | */ |
4916 | ||
8a8bc223 | 4917 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) |
1da177e4 | 4918 | { |
9af5c9c9 | 4919 | struct ata_port *ap = dev->link->ap; |
1da177e4 LT |
4920 | struct ata_queued_cmd *qc; |
4921 | ||
8a8bc223 | 4922 | qc = ata_qc_new(ap); |
1da177e4 | 4923 | if (qc) { |
1da177e4 LT |
4924 | qc->scsicmd = NULL; |
4925 | qc->ap = ap; | |
4926 | qc->dev = dev; | |
1da177e4 | 4927 | |
2c13b7ce | 4928 | ata_qc_reinit(qc); |
1da177e4 LT |
4929 | } |
4930 | ||
4931 | return qc; | |
4932 | } | |
4933 | ||
8a8bc223 TH |
4934 | /** |
4935 | * ata_qc_free - free unused ata_queued_cmd | |
4936 | * @qc: Command to complete | |
4937 | * | |
4938 | * Designed to free unused ata_queued_cmd object | |
4939 | * in case something prevents using it. | |
4940 | * | |
4941 | * LOCKING: | |
4942 | * spin_lock_irqsave(host lock) | |
4943 | */ | |
4944 | void ata_qc_free(struct ata_queued_cmd *qc) | |
4945 | { | |
a1104016 | 4946 | struct ata_port *ap; |
8a8bc223 TH |
4947 | unsigned int tag; |
4948 | ||
efcb3cf7 | 4949 | WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
a1104016 | 4950 | ap = qc->ap; |
8a8bc223 TH |
4951 | |
4952 | qc->flags = 0; | |
4953 | tag = qc->tag; | |
4954 | if (likely(ata_tag_valid(tag))) { | |
4955 | qc->tag = ATA_TAG_POISON; | |
4956 | clear_bit(tag, &ap->qc_allocated); | |
4957 | } | |
4958 | } | |
4959 | ||
76014427 | 4960 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 4961 | { |
a1104016 JL |
4962 | struct ata_port *ap; |
4963 | struct ata_link *link; | |
dedaf2b0 | 4964 | |
efcb3cf7 TH |
4965 | WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
4966 | WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
a1104016 JL |
4967 | ap = qc->ap; |
4968 | link = qc->dev->link; | |
1da177e4 LT |
4969 | |
4970 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4971 | ata_sg_clean(qc); | |
4972 | ||
7401abf2 | 4973 | /* command should be marked inactive atomically with qc completion */ |
da917d69 | 4974 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
9af5c9c9 | 4975 | link->sactive &= ~(1 << qc->tag); |
da917d69 TH |
4976 | if (!link->sactive) |
4977 | ap->nr_active_links--; | |
4978 | } else { | |
9af5c9c9 | 4979 | link->active_tag = ATA_TAG_POISON; |
da917d69 TH |
4980 | ap->nr_active_links--; |
4981 | } | |
4982 | ||
4983 | /* clear exclusive status */ | |
4984 | if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && | |
4985 | ap->excl_link == link)) | |
4986 | ap->excl_link = NULL; | |
7401abf2 | 4987 | |
3f3791d3 AL |
4988 | /* atapi: mark qc as inactive to prevent the interrupt handler |
4989 | * from completing the command twice later, before the error handler | |
4990 | * is called. (when rc != 0 and atapi request sense is needed) | |
4991 | */ | |
4992 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
dedaf2b0 | 4993 | ap->qc_active &= ~(1 << qc->tag); |
3f3791d3 | 4994 | |
1da177e4 | 4995 | /* call completion callback */ |
77853bf2 | 4996 | qc->complete_fn(qc); |
1da177e4 LT |
4997 | } |
4998 | ||
39599a53 TH |
4999 | static void fill_result_tf(struct ata_queued_cmd *qc) |
5000 | { | |
5001 | struct ata_port *ap = qc->ap; | |
5002 | ||
39599a53 | 5003 | qc->result_tf.flags = qc->tf.flags; |
22183bf5 | 5004 | ap->ops->qc_fill_rtf(qc); |
39599a53 TH |
5005 | } |
5006 | ||
00115e0f TH |
5007 | static void ata_verify_xfer(struct ata_queued_cmd *qc) |
5008 | { | |
5009 | struct ata_device *dev = qc->dev; | |
5010 | ||
5011 | if (ata_tag_internal(qc->tag)) | |
5012 | return; | |
5013 | ||
5014 | if (ata_is_nodata(qc->tf.protocol)) | |
5015 | return; | |
5016 | ||
5017 | if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) | |
5018 | return; | |
5019 | ||
5020 | dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; | |
5021 | } | |
5022 | ||
f686bcb8 TH |
5023 | /** |
5024 | * ata_qc_complete - Complete an active ATA command | |
5025 | * @qc: Command to complete | |
f686bcb8 TH |
5026 | * |
5027 | * Indicate to the mid and upper layers that an ATA | |
5028 | * command has completed, with either an ok or not-ok status. | |
5029 | * | |
5030 | * LOCKING: | |
cca3974e | 5031 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
5032 | */ |
5033 | void ata_qc_complete(struct ata_queued_cmd *qc) | |
5034 | { | |
5035 | struct ata_port *ap = qc->ap; | |
5036 | ||
5037 | /* XXX: New EH and old EH use different mechanisms to | |
5038 | * synchronize EH with regular execution path. | |
5039 | * | |
5040 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. | |
5041 | * Normal execution path is responsible for not accessing a | |
5042 | * failed qc. libata core enforces the rule by returning NULL | |
5043 | * from ata_qc_from_tag() for failed qcs. | |
5044 | * | |
5045 | * Old EH depends on ata_qc_complete() nullifying completion | |
5046 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does | |
5047 | * not synchronize with interrupt handler. Only PIO task is | |
5048 | * taken care of. | |
5049 | */ | |
5050 | if (ap->ops->error_handler) { | |
4dbfa39b TH |
5051 | struct ata_device *dev = qc->dev; |
5052 | struct ata_eh_info *ehi = &dev->link->eh_info; | |
5053 | ||
f686bcb8 TH |
5054 | if (unlikely(qc->err_mask)) |
5055 | qc->flags |= ATA_QCFLAG_FAILED; | |
5056 | ||
5057 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { | |
f4b31db9 TH |
5058 | /* always fill result TF for failed qc */ |
5059 | fill_result_tf(qc); | |
5060 | ||
5061 | if (!ata_tag_internal(qc->tag)) | |
f686bcb8 | 5062 | ata_qc_schedule_eh(qc); |
f4b31db9 TH |
5063 | else |
5064 | __ata_qc_complete(qc); | |
5065 | return; | |
f686bcb8 TH |
5066 | } |
5067 | ||
4dc738ed TH |
5068 | WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN); |
5069 | ||
f686bcb8 TH |
5070 | /* read result TF if requested */ |
5071 | if (qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 5072 | fill_result_tf(qc); |
f686bcb8 | 5073 | |
4dbfa39b TH |
5074 | /* Some commands need post-processing after successful |
5075 | * completion. | |
5076 | */ | |
5077 | switch (qc->tf.command) { | |
5078 | case ATA_CMD_SET_FEATURES: | |
5079 | if (qc->tf.feature != SETFEATURES_WC_ON && | |
5080 | qc->tf.feature != SETFEATURES_WC_OFF) | |
5081 | break; | |
5082 | /* fall through */ | |
5083 | case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ | |
5084 | case ATA_CMD_SET_MULTI: /* multi_count changed */ | |
5085 | /* revalidate device */ | |
5086 | ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; | |
5087 | ata_port_schedule_eh(ap); | |
5088 | break; | |
054a5fba TH |
5089 | |
5090 | case ATA_CMD_SLEEP: | |
5091 | dev->flags |= ATA_DFLAG_SLEEPING; | |
5092 | break; | |
4dbfa39b TH |
5093 | } |
5094 | ||
00115e0f TH |
5095 | if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) |
5096 | ata_verify_xfer(qc); | |
5097 | ||
f686bcb8 TH |
5098 | __ata_qc_complete(qc); |
5099 | } else { | |
5100 | if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) | |
5101 | return; | |
5102 | ||
5103 | /* read result TF if failed or requested */ | |
5104 | if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 5105 | fill_result_tf(qc); |
f686bcb8 TH |
5106 | |
5107 | __ata_qc_complete(qc); | |
5108 | } | |
5109 | } | |
5110 | ||
dedaf2b0 TH |
5111 | /** |
5112 | * ata_qc_complete_multiple - Complete multiple qcs successfully | |
5113 | * @ap: port in question | |
5114 | * @qc_active: new qc_active mask | |
dedaf2b0 TH |
5115 | * |
5116 | * Complete in-flight commands. This functions is meant to be | |
5117 | * called from low-level driver's interrupt routine to complete | |
5118 | * requests normally. ap->qc_active and @qc_active is compared | |
5119 | * and commands are completed accordingly. | |
5120 | * | |
5121 | * LOCKING: | |
cca3974e | 5122 | * spin_lock_irqsave(host lock) |
dedaf2b0 TH |
5123 | * |
5124 | * RETURNS: | |
5125 | * Number of completed commands on success, -errno otherwise. | |
5126 | */ | |
79f97dad | 5127 | int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active) |
dedaf2b0 TH |
5128 | { |
5129 | int nr_done = 0; | |
5130 | u32 done_mask; | |
dedaf2b0 TH |
5131 | |
5132 | done_mask = ap->qc_active ^ qc_active; | |
5133 | ||
5134 | if (unlikely(done_mask & qc_active)) { | |
5135 | ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " | |
5136 | "(%08x->%08x)\n", ap->qc_active, qc_active); | |
5137 | return -EINVAL; | |
5138 | } | |
5139 | ||
43768180 | 5140 | while (done_mask) { |
dedaf2b0 | 5141 | struct ata_queued_cmd *qc; |
43768180 | 5142 | unsigned int tag = __ffs(done_mask); |
dedaf2b0 | 5143 | |
43768180 JA |
5144 | qc = ata_qc_from_tag(ap, tag); |
5145 | if (qc) { | |
dedaf2b0 TH |
5146 | ata_qc_complete(qc); |
5147 | nr_done++; | |
5148 | } | |
43768180 | 5149 | done_mask &= ~(1 << tag); |
dedaf2b0 TH |
5150 | } |
5151 | ||
5152 | return nr_done; | |
5153 | } | |
5154 | ||
1da177e4 LT |
5155 | /** |
5156 | * ata_qc_issue - issue taskfile to device | |
5157 | * @qc: command to issue to device | |
5158 | * | |
5159 | * Prepare an ATA command to submission to device. | |
5160 | * This includes mapping the data into a DMA-able | |
5161 | * area, filling in the S/G table, and finally | |
5162 | * writing the taskfile to hardware, starting the command. | |
5163 | * | |
5164 | * LOCKING: | |
cca3974e | 5165 | * spin_lock_irqsave(host lock) |
1da177e4 | 5166 | */ |
8e0e694a | 5167 | void ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
5168 | { |
5169 | struct ata_port *ap = qc->ap; | |
9af5c9c9 | 5170 | struct ata_link *link = qc->dev->link; |
405e66b3 | 5171 | u8 prot = qc->tf.protocol; |
1da177e4 | 5172 | |
dedaf2b0 TH |
5173 | /* Make sure only one non-NCQ command is outstanding. The |
5174 | * check is skipped for old EH because it reuses active qc to | |
5175 | * request ATAPI sense. | |
5176 | */ | |
efcb3cf7 | 5177 | WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag)); |
dedaf2b0 | 5178 | |
1973a023 | 5179 | if (ata_is_ncq(prot)) { |
efcb3cf7 | 5180 | WARN_ON_ONCE(link->sactive & (1 << qc->tag)); |
da917d69 TH |
5181 | |
5182 | if (!link->sactive) | |
5183 | ap->nr_active_links++; | |
9af5c9c9 | 5184 | link->sactive |= 1 << qc->tag; |
dedaf2b0 | 5185 | } else { |
efcb3cf7 | 5186 | WARN_ON_ONCE(link->sactive); |
da917d69 TH |
5187 | |
5188 | ap->nr_active_links++; | |
9af5c9c9 | 5189 | link->active_tag = qc->tag; |
dedaf2b0 TH |
5190 | } |
5191 | ||
e4a70e76 | 5192 | qc->flags |= ATA_QCFLAG_ACTIVE; |
dedaf2b0 | 5193 | ap->qc_active |= 1 << qc->tag; |
e4a70e76 | 5194 | |
f92a2636 TH |
5195 | /* We guarantee to LLDs that they will have at least one |
5196 | * non-zero sg if the command is a data command. | |
5197 | */ | |
ff2aeb1e | 5198 | BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes)); |
f92a2636 | 5199 | |
405e66b3 | 5200 | if (ata_is_dma(prot) || (ata_is_pio(prot) && |
f92a2636 | 5201 | (ap->flags & ATA_FLAG_PIO_DMA))) |
001102d7 TH |
5202 | if (ata_sg_setup(qc)) |
5203 | goto sg_err; | |
1da177e4 | 5204 | |
cf480626 | 5205 | /* if device is sleeping, schedule reset and abort the link */ |
054a5fba | 5206 | if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { |
cf480626 | 5207 | link->eh_info.action |= ATA_EH_RESET; |
054a5fba TH |
5208 | ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); |
5209 | ata_link_abort(link); | |
5210 | return; | |
5211 | } | |
5212 | ||
1da177e4 LT |
5213 | ap->ops->qc_prep(qc); |
5214 | ||
8e0e694a TH |
5215 | qc->err_mask |= ap->ops->qc_issue(qc); |
5216 | if (unlikely(qc->err_mask)) | |
5217 | goto err; | |
5218 | return; | |
1da177e4 | 5219 | |
8e436af9 | 5220 | sg_err: |
8e0e694a TH |
5221 | qc->err_mask |= AC_ERR_SYSTEM; |
5222 | err: | |
5223 | ata_qc_complete(qc); | |
1da177e4 LT |
5224 | } |
5225 | ||
34bf2170 TH |
5226 | /** |
5227 | * sata_scr_valid - test whether SCRs are accessible | |
936fd732 | 5228 | * @link: ATA link to test SCR accessibility for |
34bf2170 | 5229 | * |
936fd732 | 5230 | * Test whether SCRs are accessible for @link. |
34bf2170 TH |
5231 | * |
5232 | * LOCKING: | |
5233 | * None. | |
5234 | * | |
5235 | * RETURNS: | |
5236 | * 1 if SCRs are accessible, 0 otherwise. | |
5237 | */ | |
936fd732 | 5238 | int sata_scr_valid(struct ata_link *link) |
34bf2170 | 5239 | { |
936fd732 TH |
5240 | struct ata_port *ap = link->ap; |
5241 | ||
a16abc0b | 5242 | return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; |
34bf2170 TH |
5243 | } |
5244 | ||
5245 | /** | |
5246 | * sata_scr_read - read SCR register of the specified port | |
936fd732 | 5247 | * @link: ATA link to read SCR for |
34bf2170 TH |
5248 | * @reg: SCR to read |
5249 | * @val: Place to store read value | |
5250 | * | |
936fd732 | 5251 | * Read SCR register @reg of @link into *@val. This function is |
633273a3 TH |
5252 | * guaranteed to succeed if @link is ap->link, the cable type of |
5253 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
5254 | * |
5255 | * LOCKING: | |
633273a3 | 5256 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
5257 | * |
5258 | * RETURNS: | |
5259 | * 0 on success, negative errno on failure. | |
5260 | */ | |
936fd732 | 5261 | int sata_scr_read(struct ata_link *link, int reg, u32 *val) |
34bf2170 | 5262 | { |
633273a3 | 5263 | if (ata_is_host_link(link)) { |
633273a3 | 5264 | if (sata_scr_valid(link)) |
82ef04fb | 5265 | return link->ap->ops->scr_read(link, reg, val); |
633273a3 TH |
5266 | return -EOPNOTSUPP; |
5267 | } | |
5268 | ||
5269 | return sata_pmp_scr_read(link, reg, val); | |
34bf2170 TH |
5270 | } |
5271 | ||
5272 | /** | |
5273 | * sata_scr_write - write SCR register of the specified port | |
936fd732 | 5274 | * @link: ATA link to write SCR for |
34bf2170 TH |
5275 | * @reg: SCR to write |
5276 | * @val: value to write | |
5277 | * | |
936fd732 | 5278 | * Write @val to SCR register @reg of @link. This function is |
633273a3 TH |
5279 | * guaranteed to succeed if @link is ap->link, the cable type of |
5280 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
5281 | * |
5282 | * LOCKING: | |
633273a3 | 5283 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
5284 | * |
5285 | * RETURNS: | |
5286 | * 0 on success, negative errno on failure. | |
5287 | */ | |
936fd732 | 5288 | int sata_scr_write(struct ata_link *link, int reg, u32 val) |
34bf2170 | 5289 | { |
633273a3 | 5290 | if (ata_is_host_link(link)) { |
633273a3 | 5291 | if (sata_scr_valid(link)) |
82ef04fb | 5292 | return link->ap->ops->scr_write(link, reg, val); |
633273a3 TH |
5293 | return -EOPNOTSUPP; |
5294 | } | |
936fd732 | 5295 | |
633273a3 | 5296 | return sata_pmp_scr_write(link, reg, val); |
34bf2170 TH |
5297 | } |
5298 | ||
5299 | /** | |
5300 | * sata_scr_write_flush - write SCR register of the specified port and flush | |
936fd732 | 5301 | * @link: ATA link to write SCR for |
34bf2170 TH |
5302 | * @reg: SCR to write |
5303 | * @val: value to write | |
5304 | * | |
5305 | * This function is identical to sata_scr_write() except that this | |
5306 | * function performs flush after writing to the register. | |
5307 | * | |
5308 | * LOCKING: | |
633273a3 | 5309 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
5310 | * |
5311 | * RETURNS: | |
5312 | * 0 on success, negative errno on failure. | |
5313 | */ | |
936fd732 | 5314 | int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) |
34bf2170 | 5315 | { |
633273a3 | 5316 | if (ata_is_host_link(link)) { |
633273a3 | 5317 | int rc; |
da3dbb17 | 5318 | |
633273a3 | 5319 | if (sata_scr_valid(link)) { |
82ef04fb | 5320 | rc = link->ap->ops->scr_write(link, reg, val); |
633273a3 | 5321 | if (rc == 0) |
82ef04fb | 5322 | rc = link->ap->ops->scr_read(link, reg, &val); |
633273a3 TH |
5323 | return rc; |
5324 | } | |
5325 | return -EOPNOTSUPP; | |
34bf2170 | 5326 | } |
633273a3 TH |
5327 | |
5328 | return sata_pmp_scr_write(link, reg, val); | |
34bf2170 TH |
5329 | } |
5330 | ||
5331 | /** | |
b1c72916 | 5332 | * ata_phys_link_online - test whether the given link is online |
936fd732 | 5333 | * @link: ATA link to test |
34bf2170 | 5334 | * |
936fd732 TH |
5335 | * Test whether @link is online. Note that this function returns |
5336 | * 0 if online status of @link cannot be obtained, so | |
5337 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
5338 | * |
5339 | * LOCKING: | |
5340 | * None. | |
5341 | * | |
5342 | * RETURNS: | |
b5b3fa38 | 5343 | * True if the port online status is available and online. |
34bf2170 | 5344 | */ |
b1c72916 | 5345 | bool ata_phys_link_online(struct ata_link *link) |
34bf2170 TH |
5346 | { |
5347 | u32 sstatus; | |
5348 | ||
936fd732 | 5349 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
9913ff8a | 5350 | ata_sstatus_online(sstatus)) |
b5b3fa38 TH |
5351 | return true; |
5352 | return false; | |
34bf2170 TH |
5353 | } |
5354 | ||
5355 | /** | |
b1c72916 | 5356 | * ata_phys_link_offline - test whether the given link is offline |
936fd732 | 5357 | * @link: ATA link to test |
34bf2170 | 5358 | * |
936fd732 TH |
5359 | * Test whether @link is offline. Note that this function |
5360 | * returns 0 if offline status of @link cannot be obtained, so | |
5361 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
5362 | * |
5363 | * LOCKING: | |
5364 | * None. | |
5365 | * | |
5366 | * RETURNS: | |
b5b3fa38 | 5367 | * True if the port offline status is available and offline. |
34bf2170 | 5368 | */ |
b1c72916 | 5369 | bool ata_phys_link_offline(struct ata_link *link) |
34bf2170 TH |
5370 | { |
5371 | u32 sstatus; | |
5372 | ||
936fd732 | 5373 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
9913ff8a | 5374 | !ata_sstatus_online(sstatus)) |
b5b3fa38 TH |
5375 | return true; |
5376 | return false; | |
34bf2170 | 5377 | } |
0baab86b | 5378 | |
b1c72916 TH |
5379 | /** |
5380 | * ata_link_online - test whether the given link is online | |
5381 | * @link: ATA link to test | |
5382 | * | |
5383 | * Test whether @link is online. This is identical to | |
5384 | * ata_phys_link_online() when there's no slave link. When | |
5385 | * there's a slave link, this function should only be called on | |
5386 | * the master link and will return true if any of M/S links is | |
5387 | * online. | |
5388 | * | |
5389 | * LOCKING: | |
5390 | * None. | |
5391 | * | |
5392 | * RETURNS: | |
5393 | * True if the port online status is available and online. | |
5394 | */ | |
5395 | bool ata_link_online(struct ata_link *link) | |
5396 | { | |
5397 | struct ata_link *slave = link->ap->slave_link; | |
5398 | ||
5399 | WARN_ON(link == slave); /* shouldn't be called on slave link */ | |
5400 | ||
5401 | return ata_phys_link_online(link) || | |
5402 | (slave && ata_phys_link_online(slave)); | |
5403 | } | |
5404 | ||
5405 | /** | |
5406 | * ata_link_offline - test whether the given link is offline | |
5407 | * @link: ATA link to test | |
5408 | * | |
5409 | * Test whether @link is offline. This is identical to | |
5410 | * ata_phys_link_offline() when there's no slave link. When | |
5411 | * there's a slave link, this function should only be called on | |
5412 | * the master link and will return true if both M/S links are | |
5413 | * offline. | |
5414 | * | |
5415 | * LOCKING: | |
5416 | * None. | |
5417 | * | |
5418 | * RETURNS: | |
5419 | * True if the port offline status is available and offline. | |
5420 | */ | |
5421 | bool ata_link_offline(struct ata_link *link) | |
5422 | { | |
5423 | struct ata_link *slave = link->ap->slave_link; | |
5424 | ||
5425 | WARN_ON(link == slave); /* shouldn't be called on slave link */ | |
5426 | ||
5427 | return ata_phys_link_offline(link) && | |
5428 | (!slave || ata_phys_link_offline(slave)); | |
5429 | } | |
5430 | ||
6ffa01d8 | 5431 | #ifdef CONFIG_PM |
cca3974e JG |
5432 | static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, |
5433 | unsigned int action, unsigned int ehi_flags, | |
5434 | int wait) | |
500530f6 TH |
5435 | { |
5436 | unsigned long flags; | |
5437 | int i, rc; | |
5438 | ||
cca3974e JG |
5439 | for (i = 0; i < host->n_ports; i++) { |
5440 | struct ata_port *ap = host->ports[i]; | |
e3667ebf | 5441 | struct ata_link *link; |
500530f6 TH |
5442 | |
5443 | /* Previous resume operation might still be in | |
5444 | * progress. Wait for PM_PENDING to clear. | |
5445 | */ | |
5446 | if (ap->pflags & ATA_PFLAG_PM_PENDING) { | |
5447 | ata_port_wait_eh(ap); | |
5448 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
5449 | } | |
5450 | ||
5451 | /* request PM ops to EH */ | |
5452 | spin_lock_irqsave(ap->lock, flags); | |
5453 | ||
5454 | ap->pm_mesg = mesg; | |
5455 | if (wait) { | |
5456 | rc = 0; | |
5457 | ap->pm_result = &rc; | |
5458 | } | |
5459 | ||
5460 | ap->pflags |= ATA_PFLAG_PM_PENDING; | |
1eca4365 | 5461 | ata_for_each_link(link, ap, HOST_FIRST) { |
e3667ebf TH |
5462 | link->eh_info.action |= action; |
5463 | link->eh_info.flags |= ehi_flags; | |
5464 | } | |
500530f6 TH |
5465 | |
5466 | ata_port_schedule_eh(ap); | |
5467 | ||
5468 | spin_unlock_irqrestore(ap->lock, flags); | |
5469 | ||
5470 | /* wait and check result */ | |
5471 | if (wait) { | |
5472 | ata_port_wait_eh(ap); | |
5473 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
5474 | if (rc) | |
5475 | return rc; | |
5476 | } | |
5477 | } | |
5478 | ||
5479 | return 0; | |
5480 | } | |
5481 | ||
5482 | /** | |
cca3974e JG |
5483 | * ata_host_suspend - suspend host |
5484 | * @host: host to suspend | |
500530f6 TH |
5485 | * @mesg: PM message |
5486 | * | |
cca3974e | 5487 | * Suspend @host. Actual operation is performed by EH. This |
500530f6 TH |
5488 | * function requests EH to perform PM operations and waits for EH |
5489 | * to finish. | |
5490 | * | |
5491 | * LOCKING: | |
5492 | * Kernel thread context (may sleep). | |
5493 | * | |
5494 | * RETURNS: | |
5495 | * 0 on success, -errno on failure. | |
5496 | */ | |
cca3974e | 5497 | int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
500530f6 | 5498 | { |
9666f400 | 5499 | int rc; |
500530f6 | 5500 | |
ca77329f KCA |
5501 | /* |
5502 | * disable link pm on all ports before requesting | |
5503 | * any pm activity | |
5504 | */ | |
5505 | ata_lpm_enable(host); | |
5506 | ||
cca3974e | 5507 | rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); |
72ad6ec4 JG |
5508 | if (rc == 0) |
5509 | host->dev->power.power_state = mesg; | |
500530f6 TH |
5510 | return rc; |
5511 | } | |
5512 | ||
5513 | /** | |
cca3974e JG |
5514 | * ata_host_resume - resume host |
5515 | * @host: host to resume | |
500530f6 | 5516 | * |
cca3974e | 5517 | * Resume @host. Actual operation is performed by EH. This |
500530f6 TH |
5518 | * function requests EH to perform PM operations and returns. |
5519 | * Note that all resume operations are performed parallely. | |
5520 | * | |
5521 | * LOCKING: | |
5522 | * Kernel thread context (may sleep). | |
5523 | */ | |
cca3974e | 5524 | void ata_host_resume(struct ata_host *host) |
500530f6 | 5525 | { |
cf480626 | 5526 | ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET, |
cca3974e | 5527 | ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); |
72ad6ec4 | 5528 | host->dev->power.power_state = PMSG_ON; |
ca77329f KCA |
5529 | |
5530 | /* reenable link pm */ | |
5531 | ata_lpm_disable(host); | |
500530f6 | 5532 | } |
6ffa01d8 | 5533 | #endif |
500530f6 | 5534 | |
c893a3ae RD |
5535 | /** |
5536 | * ata_port_start - Set port up for dma. | |
5537 | * @ap: Port to initialize | |
5538 | * | |
5539 | * Called just after data structures for each port are | |
5540 | * initialized. Allocates space for PRD table. | |
5541 | * | |
5542 | * May be used as the port_start() entry in ata_port_operations. | |
5543 | * | |
5544 | * LOCKING: | |
5545 | * Inherited from caller. | |
5546 | */ | |
f0d36efd | 5547 | int ata_port_start(struct ata_port *ap) |
1da177e4 | 5548 | { |
2f1f610b | 5549 | struct device *dev = ap->dev; |
1da177e4 | 5550 | |
f0d36efd TH |
5551 | ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, |
5552 | GFP_KERNEL); | |
1da177e4 LT |
5553 | if (!ap->prd) |
5554 | return -ENOMEM; | |
5555 | ||
1da177e4 LT |
5556 | return 0; |
5557 | } | |
5558 | ||
3ef3b43d TH |
5559 | /** |
5560 | * ata_dev_init - Initialize an ata_device structure | |
5561 | * @dev: Device structure to initialize | |
5562 | * | |
5563 | * Initialize @dev in preparation for probing. | |
5564 | * | |
5565 | * LOCKING: | |
5566 | * Inherited from caller. | |
5567 | */ | |
5568 | void ata_dev_init(struct ata_device *dev) | |
5569 | { | |
b1c72916 | 5570 | struct ata_link *link = ata_dev_phys_link(dev); |
9af5c9c9 | 5571 | struct ata_port *ap = link->ap; |
72fa4b74 TH |
5572 | unsigned long flags; |
5573 | ||
b1c72916 | 5574 | /* SATA spd limit is bound to the attached device, reset together */ |
9af5c9c9 TH |
5575 | link->sata_spd_limit = link->hw_sata_spd_limit; |
5576 | link->sata_spd = 0; | |
5a04bf4b | 5577 | |
72fa4b74 TH |
5578 | /* High bits of dev->flags are used to record warm plug |
5579 | * requests which occur asynchronously. Synchronize using | |
cca3974e | 5580 | * host lock. |
72fa4b74 | 5581 | */ |
ba6a1308 | 5582 | spin_lock_irqsave(ap->lock, flags); |
72fa4b74 | 5583 | dev->flags &= ~ATA_DFLAG_INIT_MASK; |
3dcc323f | 5584 | dev->horkage = 0; |
ba6a1308 | 5585 | spin_unlock_irqrestore(ap->lock, flags); |
3ef3b43d | 5586 | |
99cf610a TH |
5587 | memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0, |
5588 | ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN); | |
3ef3b43d TH |
5589 | dev->pio_mask = UINT_MAX; |
5590 | dev->mwdma_mask = UINT_MAX; | |
5591 | dev->udma_mask = UINT_MAX; | |
5592 | } | |
5593 | ||
4fb37a25 TH |
5594 | /** |
5595 | * ata_link_init - Initialize an ata_link structure | |
5596 | * @ap: ATA port link is attached to | |
5597 | * @link: Link structure to initialize | |
8989805d | 5598 | * @pmp: Port multiplier port number |
4fb37a25 TH |
5599 | * |
5600 | * Initialize @link. | |
5601 | * | |
5602 | * LOCKING: | |
5603 | * Kernel thread context (may sleep) | |
5604 | */ | |
fb7fd614 | 5605 | void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) |
4fb37a25 TH |
5606 | { |
5607 | int i; | |
5608 | ||
5609 | /* clear everything except for devices */ | |
5610 | memset(link, 0, offsetof(struct ata_link, device[0])); | |
5611 | ||
5612 | link->ap = ap; | |
8989805d | 5613 | link->pmp = pmp; |
4fb37a25 TH |
5614 | link->active_tag = ATA_TAG_POISON; |
5615 | link->hw_sata_spd_limit = UINT_MAX; | |
5616 | ||
5617 | /* can't use iterator, ap isn't initialized yet */ | |
5618 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
5619 | struct ata_device *dev = &link->device[i]; | |
5620 | ||
5621 | dev->link = link; | |
5622 | dev->devno = dev - link->device; | |
110f66d2 TH |
5623 | #ifdef CONFIG_ATA_ACPI |
5624 | dev->gtf_filter = ata_acpi_gtf_filter; | |
5625 | #endif | |
4fb37a25 TH |
5626 | ata_dev_init(dev); |
5627 | } | |
5628 | } | |
5629 | ||
5630 | /** | |
5631 | * sata_link_init_spd - Initialize link->sata_spd_limit | |
5632 | * @link: Link to configure sata_spd_limit for | |
5633 | * | |
5634 | * Initialize @link->[hw_]sata_spd_limit to the currently | |
5635 | * configured value. | |
5636 | * | |
5637 | * LOCKING: | |
5638 | * Kernel thread context (may sleep). | |
5639 | * | |
5640 | * RETURNS: | |
5641 | * 0 on success, -errno on failure. | |
5642 | */ | |
fb7fd614 | 5643 | int sata_link_init_spd(struct ata_link *link) |
4fb37a25 | 5644 | { |
33267325 | 5645 | u8 spd; |
4fb37a25 TH |
5646 | int rc; |
5647 | ||
d127ea7b | 5648 | rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol); |
4fb37a25 TH |
5649 | if (rc) |
5650 | return rc; | |
5651 | ||
d127ea7b | 5652 | spd = (link->saved_scontrol >> 4) & 0xf; |
4fb37a25 TH |
5653 | if (spd) |
5654 | link->hw_sata_spd_limit &= (1 << spd) - 1; | |
5655 | ||
05944bdf | 5656 | ata_force_link_limits(link); |
33267325 | 5657 | |
4fb37a25 TH |
5658 | link->sata_spd_limit = link->hw_sata_spd_limit; |
5659 | ||
5660 | return 0; | |
5661 | } | |
5662 | ||
1da177e4 | 5663 | /** |
f3187195 TH |
5664 | * ata_port_alloc - allocate and initialize basic ATA port resources |
5665 | * @host: ATA host this allocated port belongs to | |
1da177e4 | 5666 | * |
f3187195 TH |
5667 | * Allocate and initialize basic ATA port resources. |
5668 | * | |
5669 | * RETURNS: | |
5670 | * Allocate ATA port on success, NULL on failure. | |
0cba632b | 5671 | * |
1da177e4 | 5672 | * LOCKING: |
f3187195 | 5673 | * Inherited from calling layer (may sleep). |
1da177e4 | 5674 | */ |
f3187195 | 5675 | struct ata_port *ata_port_alloc(struct ata_host *host) |
1da177e4 | 5676 | { |
f3187195 | 5677 | struct ata_port *ap; |
1da177e4 | 5678 | |
f3187195 TH |
5679 | DPRINTK("ENTER\n"); |
5680 | ||
5681 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); | |
5682 | if (!ap) | |
5683 | return NULL; | |
5684 | ||
f4d6d004 | 5685 | ap->pflags |= ATA_PFLAG_INITIALIZING; |
cca3974e | 5686 | ap->lock = &host->lock; |
198e0fed | 5687 | ap->flags = ATA_FLAG_DISABLED; |
f3187195 | 5688 | ap->print_id = -1; |
1da177e4 | 5689 | ap->ctl = ATA_DEVCTL_OBS; |
cca3974e | 5690 | ap->host = host; |
f3187195 | 5691 | ap->dev = host->dev; |
1da177e4 | 5692 | ap->last_ctl = 0xFF; |
bd5d825c BP |
5693 | |
5694 | #if defined(ATA_VERBOSE_DEBUG) | |
5695 | /* turn on all debugging levels */ | |
5696 | ap->msg_enable = 0x00FF; | |
5697 | #elif defined(ATA_DEBUG) | |
5698 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; | |
88574551 | 5699 | #else |
0dd4b21f | 5700 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
bd5d825c | 5701 | #endif |
1da177e4 | 5702 | |
127102ae | 5703 | #ifdef CONFIG_ATA_SFF |
442eacc3 | 5704 | INIT_DELAYED_WORK(&ap->port_task, ata_pio_task); |
f667fdbb TH |
5705 | #else |
5706 | INIT_DELAYED_WORK(&ap->port_task, NULL); | |
127102ae | 5707 | #endif |
65f27f38 DH |
5708 | INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); |
5709 | INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); | |
a72ec4ce | 5710 | INIT_LIST_HEAD(&ap->eh_done_q); |
c6cf9e99 | 5711 | init_waitqueue_head(&ap->eh_wait_q); |
45fabbb7 | 5712 | init_completion(&ap->park_req_pending); |
5ddf24c5 TH |
5713 | init_timer_deferrable(&ap->fastdrain_timer); |
5714 | ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; | |
5715 | ap->fastdrain_timer.data = (unsigned long)ap; | |
1da177e4 | 5716 | |
838df628 | 5717 | ap->cbl = ATA_CBL_NONE; |
838df628 | 5718 | |
8989805d | 5719 | ata_link_init(ap, &ap->link, 0); |
1da177e4 LT |
5720 | |
5721 | #ifdef ATA_IRQ_TRAP | |
5722 | ap->stats.unhandled_irq = 1; | |
5723 | ap->stats.idle_irq = 1; | |
5724 | #endif | |
1da177e4 | 5725 | return ap; |
1da177e4 LT |
5726 | } |
5727 | ||
f0d36efd TH |
5728 | static void ata_host_release(struct device *gendev, void *res) |
5729 | { | |
5730 | struct ata_host *host = dev_get_drvdata(gendev); | |
5731 | int i; | |
5732 | ||
1aa506e4 TH |
5733 | for (i = 0; i < host->n_ports; i++) { |
5734 | struct ata_port *ap = host->ports[i]; | |
5735 | ||
4911487a TH |
5736 | if (!ap) |
5737 | continue; | |
5738 | ||
5739 | if (ap->scsi_host) | |
1aa506e4 TH |
5740 | scsi_host_put(ap->scsi_host); |
5741 | ||
633273a3 | 5742 | kfree(ap->pmp_link); |
b1c72916 | 5743 | kfree(ap->slave_link); |
4911487a | 5744 | kfree(ap); |
1aa506e4 TH |
5745 | host->ports[i] = NULL; |
5746 | } | |
5747 | ||
1aa56cca | 5748 | dev_set_drvdata(gendev, NULL); |
f0d36efd TH |
5749 | } |
5750 | ||
f3187195 TH |
5751 | /** |
5752 | * ata_host_alloc - allocate and init basic ATA host resources | |
5753 | * @dev: generic device this host is associated with | |
5754 | * @max_ports: maximum number of ATA ports associated with this host | |
5755 | * | |
5756 | * Allocate and initialize basic ATA host resources. LLD calls | |
5757 | * this function to allocate a host, initializes it fully and | |
5758 | * attaches it using ata_host_register(). | |
5759 | * | |
5760 | * @max_ports ports are allocated and host->n_ports is | |
5761 | * initialized to @max_ports. The caller is allowed to decrease | |
5762 | * host->n_ports before calling ata_host_register(). The unused | |
5763 | * ports will be automatically freed on registration. | |
5764 | * | |
5765 | * RETURNS: | |
5766 | * Allocate ATA host on success, NULL on failure. | |
5767 | * | |
5768 | * LOCKING: | |
5769 | * Inherited from calling layer (may sleep). | |
5770 | */ | |
5771 | struct ata_host *ata_host_alloc(struct device *dev, int max_ports) | |
5772 | { | |
5773 | struct ata_host *host; | |
5774 | size_t sz; | |
5775 | int i; | |
5776 | ||
5777 | DPRINTK("ENTER\n"); | |
5778 | ||
5779 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) | |
5780 | return NULL; | |
5781 | ||
5782 | /* alloc a container for our list of ATA ports (buses) */ | |
5783 | sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); | |
5784 | /* alloc a container for our list of ATA ports (buses) */ | |
5785 | host = devres_alloc(ata_host_release, sz, GFP_KERNEL); | |
5786 | if (!host) | |
5787 | goto err_out; | |
5788 | ||
5789 | devres_add(dev, host); | |
5790 | dev_set_drvdata(dev, host); | |
5791 | ||
5792 | spin_lock_init(&host->lock); | |
5793 | host->dev = dev; | |
5794 | host->n_ports = max_ports; | |
5795 | ||
5796 | /* allocate ports bound to this host */ | |
5797 | for (i = 0; i < max_ports; i++) { | |
5798 | struct ata_port *ap; | |
5799 | ||
5800 | ap = ata_port_alloc(host); | |
5801 | if (!ap) | |
5802 | goto err_out; | |
5803 | ||
5804 | ap->port_no = i; | |
5805 | host->ports[i] = ap; | |
5806 | } | |
5807 | ||
5808 | devres_remove_group(dev, NULL); | |
5809 | return host; | |
5810 | ||
5811 | err_out: | |
5812 | devres_release_group(dev, NULL); | |
5813 | return NULL; | |
5814 | } | |
5815 | ||
f5cda257 TH |
5816 | /** |
5817 | * ata_host_alloc_pinfo - alloc host and init with port_info array | |
5818 | * @dev: generic device this host is associated with | |
5819 | * @ppi: array of ATA port_info to initialize host with | |
5820 | * @n_ports: number of ATA ports attached to this host | |
5821 | * | |
5822 | * Allocate ATA host and initialize with info from @ppi. If NULL | |
5823 | * terminated, @ppi may contain fewer entries than @n_ports. The | |
5824 | * last entry will be used for the remaining ports. | |
5825 | * | |
5826 | * RETURNS: | |
5827 | * Allocate ATA host on success, NULL on failure. | |
5828 | * | |
5829 | * LOCKING: | |
5830 | * Inherited from calling layer (may sleep). | |
5831 | */ | |
5832 | struct ata_host *ata_host_alloc_pinfo(struct device *dev, | |
5833 | const struct ata_port_info * const * ppi, | |
5834 | int n_ports) | |
5835 | { | |
5836 | const struct ata_port_info *pi; | |
5837 | struct ata_host *host; | |
5838 | int i, j; | |
5839 | ||
5840 | host = ata_host_alloc(dev, n_ports); | |
5841 | if (!host) | |
5842 | return NULL; | |
5843 | ||
5844 | for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { | |
5845 | struct ata_port *ap = host->ports[i]; | |
5846 | ||
5847 | if (ppi[j]) | |
5848 | pi = ppi[j++]; | |
5849 | ||
5850 | ap->pio_mask = pi->pio_mask; | |
5851 | ap->mwdma_mask = pi->mwdma_mask; | |
5852 | ap->udma_mask = pi->udma_mask; | |
5853 | ap->flags |= pi->flags; | |
0c88758b | 5854 | ap->link.flags |= pi->link_flags; |
f5cda257 TH |
5855 | ap->ops = pi->port_ops; |
5856 | ||
5857 | if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) | |
5858 | host->ops = pi->port_ops; | |
f5cda257 TH |
5859 | } |
5860 | ||
5861 | return host; | |
5862 | } | |
5863 | ||
b1c72916 TH |
5864 | /** |
5865 | * ata_slave_link_init - initialize slave link | |
5866 | * @ap: port to initialize slave link for | |
5867 | * | |
5868 | * Create and initialize slave link for @ap. This enables slave | |
5869 | * link handling on the port. | |
5870 | * | |
5871 | * In libata, a port contains links and a link contains devices. | |
5872 | * There is single host link but if a PMP is attached to it, | |
5873 | * there can be multiple fan-out links. On SATA, there's usually | |
5874 | * a single device connected to a link but PATA and SATA | |
5875 | * controllers emulating TF based interface can have two - master | |
5876 | * and slave. | |
5877 | * | |
5878 | * However, there are a few controllers which don't fit into this | |
5879 | * abstraction too well - SATA controllers which emulate TF | |
5880 | * interface with both master and slave devices but also have | |
5881 | * separate SCR register sets for each device. These controllers | |
5882 | * need separate links for physical link handling | |
5883 | * (e.g. onlineness, link speed) but should be treated like a | |
5884 | * traditional M/S controller for everything else (e.g. command | |
5885 | * issue, softreset). | |
5886 | * | |
5887 | * slave_link is libata's way of handling this class of | |
5888 | * controllers without impacting core layer too much. For | |
5889 | * anything other than physical link handling, the default host | |
5890 | * link is used for both master and slave. For physical link | |
5891 | * handling, separate @ap->slave_link is used. All dirty details | |
5892 | * are implemented inside libata core layer. From LLD's POV, the | |
5893 | * only difference is that prereset, hardreset and postreset are | |
5894 | * called once more for the slave link, so the reset sequence | |
5895 | * looks like the following. | |
5896 | * | |
5897 | * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) -> | |
5898 | * softreset(M) -> postreset(M) -> postreset(S) | |
5899 | * | |
5900 | * Note that softreset is called only for the master. Softreset | |
5901 | * resets both M/S by definition, so SRST on master should handle | |
5902 | * both (the standard method will work just fine). | |
5903 | * | |
5904 | * LOCKING: | |
5905 | * Should be called before host is registered. | |
5906 | * | |
5907 | * RETURNS: | |
5908 | * 0 on success, -errno on failure. | |
5909 | */ | |
5910 | int ata_slave_link_init(struct ata_port *ap) | |
5911 | { | |
5912 | struct ata_link *link; | |
5913 | ||
5914 | WARN_ON(ap->slave_link); | |
5915 | WARN_ON(ap->flags & ATA_FLAG_PMP); | |
5916 | ||
5917 | link = kzalloc(sizeof(*link), GFP_KERNEL); | |
5918 | if (!link) | |
5919 | return -ENOMEM; | |
5920 | ||
5921 | ata_link_init(ap, link, 1); | |
5922 | ap->slave_link = link; | |
5923 | return 0; | |
5924 | } | |
5925 | ||
32ebbc0c TH |
5926 | static void ata_host_stop(struct device *gendev, void *res) |
5927 | { | |
5928 | struct ata_host *host = dev_get_drvdata(gendev); | |
5929 | int i; | |
5930 | ||
5931 | WARN_ON(!(host->flags & ATA_HOST_STARTED)); | |
5932 | ||
5933 | for (i = 0; i < host->n_ports; i++) { | |
5934 | struct ata_port *ap = host->ports[i]; | |
5935 | ||
5936 | if (ap->ops->port_stop) | |
5937 | ap->ops->port_stop(ap); | |
5938 | } | |
5939 | ||
5940 | if (host->ops->host_stop) | |
5941 | host->ops->host_stop(host); | |
5942 | } | |
5943 | ||
029cfd6b TH |
5944 | /** |
5945 | * ata_finalize_port_ops - finalize ata_port_operations | |
5946 | * @ops: ata_port_operations to finalize | |
5947 | * | |
5948 | * An ata_port_operations can inherit from another ops and that | |
5949 | * ops can again inherit from another. This can go on as many | |
5950 | * times as necessary as long as there is no loop in the | |
5951 | * inheritance chain. | |
5952 | * | |
5953 | * Ops tables are finalized when the host is started. NULL or | |
5954 | * unspecified entries are inherited from the closet ancestor | |
5955 | * which has the method and the entry is populated with it. | |
5956 | * After finalization, the ops table directly points to all the | |
5957 | * methods and ->inherits is no longer necessary and cleared. | |
5958 | * | |
5959 | * Using ATA_OP_NULL, inheriting ops can force a method to NULL. | |
5960 | * | |
5961 | * LOCKING: | |
5962 | * None. | |
5963 | */ | |
5964 | static void ata_finalize_port_ops(struct ata_port_operations *ops) | |
5965 | { | |
2da67659 | 5966 | static DEFINE_SPINLOCK(lock); |
029cfd6b TH |
5967 | const struct ata_port_operations *cur; |
5968 | void **begin = (void **)ops; | |
5969 | void **end = (void **)&ops->inherits; | |
5970 | void **pp; | |
5971 | ||
5972 | if (!ops || !ops->inherits) | |
5973 | return; | |
5974 | ||
5975 | spin_lock(&lock); | |
5976 | ||
5977 | for (cur = ops->inherits; cur; cur = cur->inherits) { | |
5978 | void **inherit = (void **)cur; | |
5979 | ||
5980 | for (pp = begin; pp < end; pp++, inherit++) | |
5981 | if (!*pp) | |
5982 | *pp = *inherit; | |
5983 | } | |
5984 | ||
5985 | for (pp = begin; pp < end; pp++) | |
5986 | if (IS_ERR(*pp)) | |
5987 | *pp = NULL; | |
5988 | ||
5989 | ops->inherits = NULL; | |
5990 | ||
5991 | spin_unlock(&lock); | |
5992 | } | |
5993 | ||
ecef7253 TH |
5994 | /** |
5995 | * ata_host_start - start and freeze ports of an ATA host | |
5996 | * @host: ATA host to start ports for | |
5997 | * | |
5998 | * Start and then freeze ports of @host. Started status is | |
5999 | * recorded in host->flags, so this function can be called | |
6000 | * multiple times. Ports are guaranteed to get started only | |
f3187195 TH |
6001 | * once. If host->ops isn't initialized yet, its set to the |
6002 | * first non-dummy port ops. | |
ecef7253 TH |
6003 | * |
6004 | * LOCKING: | |
6005 | * Inherited from calling layer (may sleep). | |
6006 | * | |
6007 | * RETURNS: | |
6008 | * 0 if all ports are started successfully, -errno otherwise. | |
6009 | */ | |
6010 | int ata_host_start(struct ata_host *host) | |
6011 | { | |
32ebbc0c TH |
6012 | int have_stop = 0; |
6013 | void *start_dr = NULL; | |
ecef7253 TH |
6014 | int i, rc; |
6015 | ||
6016 | if (host->flags & ATA_HOST_STARTED) | |
6017 | return 0; | |
6018 | ||
029cfd6b TH |
6019 | ata_finalize_port_ops(host->ops); |
6020 | ||
ecef7253 TH |
6021 | for (i = 0; i < host->n_ports; i++) { |
6022 | struct ata_port *ap = host->ports[i]; | |
6023 | ||
029cfd6b TH |
6024 | ata_finalize_port_ops(ap->ops); |
6025 | ||
f3187195 TH |
6026 | if (!host->ops && !ata_port_is_dummy(ap)) |
6027 | host->ops = ap->ops; | |
6028 | ||
32ebbc0c TH |
6029 | if (ap->ops->port_stop) |
6030 | have_stop = 1; | |
6031 | } | |
6032 | ||
6033 | if (host->ops->host_stop) | |
6034 | have_stop = 1; | |
6035 | ||
6036 | if (have_stop) { | |
6037 | start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); | |
6038 | if (!start_dr) | |
6039 | return -ENOMEM; | |
6040 | } | |
6041 | ||
6042 | for (i = 0; i < host->n_ports; i++) { | |
6043 | struct ata_port *ap = host->ports[i]; | |
6044 | ||
ecef7253 TH |
6045 | if (ap->ops->port_start) { |
6046 | rc = ap->ops->port_start(ap); | |
6047 | if (rc) { | |
0f9fe9b7 | 6048 | if (rc != -ENODEV) |
0f757743 AM |
6049 | dev_printk(KERN_ERR, host->dev, |
6050 | "failed to start port %d " | |
6051 | "(errno=%d)\n", i, rc); | |
ecef7253 TH |
6052 | goto err_out; |
6053 | } | |
6054 | } | |
ecef7253 TH |
6055 | ata_eh_freeze_port(ap); |
6056 | } | |
6057 | ||
32ebbc0c TH |
6058 | if (start_dr) |
6059 | devres_add(host->dev, start_dr); | |
ecef7253 TH |
6060 | host->flags |= ATA_HOST_STARTED; |
6061 | return 0; | |
6062 | ||
6063 | err_out: | |
6064 | while (--i >= 0) { | |
6065 | struct ata_port *ap = host->ports[i]; | |
6066 | ||
6067 | if (ap->ops->port_stop) | |
6068 | ap->ops->port_stop(ap); | |
6069 | } | |
32ebbc0c | 6070 | devres_free(start_dr); |
ecef7253 TH |
6071 | return rc; |
6072 | } | |
6073 | ||
b03732f0 | 6074 | /** |
cca3974e JG |
6075 | * ata_sas_host_init - Initialize a host struct |
6076 | * @host: host to initialize | |
6077 | * @dev: device host is attached to | |
6078 | * @flags: host flags | |
6079 | * @ops: port_ops | |
b03732f0 BK |
6080 | * |
6081 | * LOCKING: | |
6082 | * PCI/etc. bus probe sem. | |
6083 | * | |
6084 | */ | |
f3187195 | 6085 | /* KILLME - the only user left is ipr */ |
cca3974e | 6086 | void ata_host_init(struct ata_host *host, struct device *dev, |
029cfd6b | 6087 | unsigned long flags, struct ata_port_operations *ops) |
b03732f0 | 6088 | { |
cca3974e JG |
6089 | spin_lock_init(&host->lock); |
6090 | host->dev = dev; | |
6091 | host->flags = flags; | |
6092 | host->ops = ops; | |
b03732f0 BK |
6093 | } |
6094 | ||
79318057 AV |
6095 | |
6096 | static void async_port_probe(void *data, async_cookie_t cookie) | |
6097 | { | |
6098 | int rc; | |
6099 | struct ata_port *ap = data; | |
886ad09f AV |
6100 | |
6101 | /* | |
6102 | * If we're not allowed to scan this host in parallel, | |
6103 | * we need to wait until all previous scans have completed | |
6104 | * before going further. | |
fa853a48 AV |
6105 | * Jeff Garzik says this is only within a controller, so we |
6106 | * don't need to wait for port 0, only for later ports. | |
886ad09f | 6107 | */ |
fa853a48 | 6108 | if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0) |
886ad09f AV |
6109 | async_synchronize_cookie(cookie); |
6110 | ||
79318057 AV |
6111 | /* probe */ |
6112 | if (ap->ops->error_handler) { | |
6113 | struct ata_eh_info *ehi = &ap->link.eh_info; | |
6114 | unsigned long flags; | |
6115 | ||
6116 | ata_port_probe(ap); | |
6117 | ||
6118 | /* kick EH for boot probing */ | |
6119 | spin_lock_irqsave(ap->lock, flags); | |
6120 | ||
6121 | ehi->probe_mask |= ATA_ALL_DEVICES; | |
6122 | ehi->action |= ATA_EH_RESET | ATA_EH_LPM; | |
6123 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; | |
6124 | ||
6125 | ap->pflags &= ~ATA_PFLAG_INITIALIZING; | |
6126 | ap->pflags |= ATA_PFLAG_LOADING; | |
6127 | ata_port_schedule_eh(ap); | |
6128 | ||
6129 | spin_unlock_irqrestore(ap->lock, flags); | |
6130 | ||
6131 | /* wait for EH to finish */ | |
6132 | ata_port_wait_eh(ap); | |
6133 | } else { | |
6134 | DPRINTK("ata%u: bus probe begin\n", ap->print_id); | |
6135 | rc = ata_bus_probe(ap); | |
6136 | DPRINTK("ata%u: bus probe end\n", ap->print_id); | |
6137 | ||
6138 | if (rc) { | |
6139 | /* FIXME: do something useful here? | |
6140 | * Current libata behavior will | |
6141 | * tear down everything when | |
6142 | * the module is removed | |
6143 | * or the h/w is unplugged. | |
6144 | */ | |
6145 | } | |
6146 | } | |
f29d3b23 AV |
6147 | |
6148 | /* in order to keep device order, we need to synchronize at this point */ | |
6149 | async_synchronize_cookie(cookie); | |
6150 | ||
6151 | ata_scsi_scan_host(ap, 1); | |
6152 | ||
79318057 | 6153 | } |
f3187195 TH |
6154 | /** |
6155 | * ata_host_register - register initialized ATA host | |
6156 | * @host: ATA host to register | |
6157 | * @sht: template for SCSI host | |
6158 | * | |
6159 | * Register initialized ATA host. @host is allocated using | |
6160 | * ata_host_alloc() and fully initialized by LLD. This function | |
6161 | * starts ports, registers @host with ATA and SCSI layers and | |
6162 | * probe registered devices. | |
6163 | * | |
6164 | * LOCKING: | |
6165 | * Inherited from calling layer (may sleep). | |
6166 | * | |
6167 | * RETURNS: | |
6168 | * 0 on success, -errno otherwise. | |
6169 | */ | |
6170 | int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) | |
6171 | { | |
6172 | int i, rc; | |
6173 | ||
6174 | /* host must have been started */ | |
6175 | if (!(host->flags & ATA_HOST_STARTED)) { | |
6176 | dev_printk(KERN_ERR, host->dev, | |
6177 | "BUG: trying to register unstarted host\n"); | |
6178 | WARN_ON(1); | |
6179 | return -EINVAL; | |
6180 | } | |
6181 | ||
6182 | /* Blow away unused ports. This happens when LLD can't | |
6183 | * determine the exact number of ports to allocate at | |
6184 | * allocation time. | |
6185 | */ | |
6186 | for (i = host->n_ports; host->ports[i]; i++) | |
6187 | kfree(host->ports[i]); | |
6188 | ||
6189 | /* give ports names and add SCSI hosts */ | |
6190 | for (i = 0; i < host->n_ports; i++) | |
6191 | host->ports[i]->print_id = ata_print_id++; | |
6192 | ||
6193 | rc = ata_scsi_add_hosts(host, sht); | |
6194 | if (rc) | |
6195 | return rc; | |
6196 | ||
fafbae87 TH |
6197 | /* associate with ACPI nodes */ |
6198 | ata_acpi_associate(host); | |
6199 | ||
f3187195 TH |
6200 | /* set cable, sata_spd_limit and report */ |
6201 | for (i = 0; i < host->n_ports; i++) { | |
6202 | struct ata_port *ap = host->ports[i]; | |
f3187195 TH |
6203 | unsigned long xfer_mask; |
6204 | ||
6205 | /* set SATA cable type if still unset */ | |
6206 | if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) | |
6207 | ap->cbl = ATA_CBL_SATA; | |
6208 | ||
6209 | /* init sata_spd_limit to the current value */ | |
4fb37a25 | 6210 | sata_link_init_spd(&ap->link); |
b1c72916 TH |
6211 | if (ap->slave_link) |
6212 | sata_link_init_spd(ap->slave_link); | |
f3187195 | 6213 | |
cbcdd875 | 6214 | /* print per-port info to dmesg */ |
f3187195 TH |
6215 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, |
6216 | ap->udma_mask); | |
6217 | ||
abf6e8ed | 6218 | if (!ata_port_is_dummy(ap)) { |
cbcdd875 TH |
6219 | ata_port_printk(ap, KERN_INFO, |
6220 | "%cATA max %s %s\n", | |
a16abc0b | 6221 | (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', |
f3187195 | 6222 | ata_mode_string(xfer_mask), |
cbcdd875 | 6223 | ap->link.eh_info.desc); |
abf6e8ed TH |
6224 | ata_ehi_clear_desc(&ap->link.eh_info); |
6225 | } else | |
f3187195 TH |
6226 | ata_port_printk(ap, KERN_INFO, "DUMMY\n"); |
6227 | } | |
6228 | ||
f6005354 | 6229 | /* perform each probe asynchronously */ |
f3187195 TH |
6230 | for (i = 0; i < host->n_ports; i++) { |
6231 | struct ata_port *ap = host->ports[i]; | |
79318057 | 6232 | async_schedule(async_port_probe, ap); |
f3187195 | 6233 | } |
f3187195 TH |
6234 | |
6235 | return 0; | |
6236 | } | |
6237 | ||
f5cda257 TH |
6238 | /** |
6239 | * ata_host_activate - start host, request IRQ and register it | |
6240 | * @host: target ATA host | |
6241 | * @irq: IRQ to request | |
6242 | * @irq_handler: irq_handler used when requesting IRQ | |
6243 | * @irq_flags: irq_flags used when requesting IRQ | |
6244 | * @sht: scsi_host_template to use when registering the host | |
6245 | * | |
6246 | * After allocating an ATA host and initializing it, most libata | |
6247 | * LLDs perform three steps to activate the host - start host, | |
6248 | * request IRQ and register it. This helper takes necessasry | |
6249 | * arguments and performs the three steps in one go. | |
6250 | * | |
3d46b2e2 PM |
6251 | * An invalid IRQ skips the IRQ registration and expects the host to |
6252 | * have set polling mode on the port. In this case, @irq_handler | |
6253 | * should be NULL. | |
6254 | * | |
f5cda257 TH |
6255 | * LOCKING: |
6256 | * Inherited from calling layer (may sleep). | |
6257 | * | |
6258 | * RETURNS: | |
6259 | * 0 on success, -errno otherwise. | |
6260 | */ | |
6261 | int ata_host_activate(struct ata_host *host, int irq, | |
6262 | irq_handler_t irq_handler, unsigned long irq_flags, | |
6263 | struct scsi_host_template *sht) | |
6264 | { | |
cbcdd875 | 6265 | int i, rc; |
f5cda257 TH |
6266 | |
6267 | rc = ata_host_start(host); | |
6268 | if (rc) | |
6269 | return rc; | |
6270 | ||
3d46b2e2 PM |
6271 | /* Special case for polling mode */ |
6272 | if (!irq) { | |
6273 | WARN_ON(irq_handler); | |
6274 | return ata_host_register(host, sht); | |
6275 | } | |
6276 | ||
f5cda257 TH |
6277 | rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, |
6278 | dev_driver_string(host->dev), host); | |
6279 | if (rc) | |
6280 | return rc; | |
6281 | ||
cbcdd875 TH |
6282 | for (i = 0; i < host->n_ports; i++) |
6283 | ata_port_desc(host->ports[i], "irq %d", irq); | |
4031826b | 6284 | |
f5cda257 TH |
6285 | rc = ata_host_register(host, sht); |
6286 | /* if failed, just free the IRQ and leave ports alone */ | |
6287 | if (rc) | |
6288 | devm_free_irq(host->dev, irq, host); | |
6289 | ||
6290 | return rc; | |
6291 | } | |
6292 | ||
720ba126 TH |
6293 | /** |
6294 | * ata_port_detach - Detach ATA port in prepration of device removal | |
6295 | * @ap: ATA port to be detached | |
6296 | * | |
6297 | * Detach all ATA devices and the associated SCSI devices of @ap; | |
6298 | * then, remove the associated SCSI host. @ap is guaranteed to | |
6299 | * be quiescent on return from this function. | |
6300 | * | |
6301 | * LOCKING: | |
6302 | * Kernel thread context (may sleep). | |
6303 | */ | |
741b7763 | 6304 | static void ata_port_detach(struct ata_port *ap) |
720ba126 TH |
6305 | { |
6306 | unsigned long flags; | |
720ba126 TH |
6307 | |
6308 | if (!ap->ops->error_handler) | |
c3cf30a9 | 6309 | goto skip_eh; |
720ba126 TH |
6310 | |
6311 | /* tell EH we're leaving & flush EH */ | |
ba6a1308 | 6312 | spin_lock_irqsave(ap->lock, flags); |
b51e9e5d | 6313 | ap->pflags |= ATA_PFLAG_UNLOADING; |
ece180d1 | 6314 | ata_port_schedule_eh(ap); |
ba6a1308 | 6315 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 | 6316 | |
ece180d1 | 6317 | /* wait till EH commits suicide */ |
720ba126 TH |
6318 | ata_port_wait_eh(ap); |
6319 | ||
ece180d1 TH |
6320 | /* it better be dead now */ |
6321 | WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED)); | |
720ba126 | 6322 | |
45a66c1c | 6323 | cancel_rearming_delayed_work(&ap->hotplug_task); |
720ba126 | 6324 | |
c3cf30a9 | 6325 | skip_eh: |
720ba126 | 6326 | /* remove the associated SCSI host */ |
cca3974e | 6327 | scsi_remove_host(ap->scsi_host); |
720ba126 TH |
6328 | } |
6329 | ||
0529c159 TH |
6330 | /** |
6331 | * ata_host_detach - Detach all ports of an ATA host | |
6332 | * @host: Host to detach | |
6333 | * | |
6334 | * Detach all ports of @host. | |
6335 | * | |
6336 | * LOCKING: | |
6337 | * Kernel thread context (may sleep). | |
6338 | */ | |
6339 | void ata_host_detach(struct ata_host *host) | |
6340 | { | |
6341 | int i; | |
6342 | ||
6343 | for (i = 0; i < host->n_ports; i++) | |
6344 | ata_port_detach(host->ports[i]); | |
562f0c2d TH |
6345 | |
6346 | /* the host is dead now, dissociate ACPI */ | |
6347 | ata_acpi_dissociate(host); | |
0529c159 TH |
6348 | } |
6349 | ||
374b1873 JG |
6350 | #ifdef CONFIG_PCI |
6351 | ||
1da177e4 LT |
6352 | /** |
6353 | * ata_pci_remove_one - PCI layer callback for device removal | |
6354 | * @pdev: PCI device that was removed | |
6355 | * | |
b878ca5d TH |
6356 | * PCI layer indicates to libata via this hook that hot-unplug or |
6357 | * module unload event has occurred. Detach all ports. Resource | |
6358 | * release is handled via devres. | |
1da177e4 LT |
6359 | * |
6360 | * LOCKING: | |
6361 | * Inherited from PCI layer (may sleep). | |
6362 | */ | |
f0d36efd | 6363 | void ata_pci_remove_one(struct pci_dev *pdev) |
1da177e4 | 6364 | { |
2855568b | 6365 | struct device *dev = &pdev->dev; |
cca3974e | 6366 | struct ata_host *host = dev_get_drvdata(dev); |
1da177e4 | 6367 | |
b878ca5d | 6368 | ata_host_detach(host); |
1da177e4 LT |
6369 | } |
6370 | ||
6371 | /* move to PCI subsystem */ | |
057ace5e | 6372 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
6373 | { |
6374 | unsigned long tmp = 0; | |
6375 | ||
6376 | switch (bits->width) { | |
6377 | case 1: { | |
6378 | u8 tmp8 = 0; | |
6379 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
6380 | tmp = tmp8; | |
6381 | break; | |
6382 | } | |
6383 | case 2: { | |
6384 | u16 tmp16 = 0; | |
6385 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
6386 | tmp = tmp16; | |
6387 | break; | |
6388 | } | |
6389 | case 4: { | |
6390 | u32 tmp32 = 0; | |
6391 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
6392 | tmp = tmp32; | |
6393 | break; | |
6394 | } | |
6395 | ||
6396 | default: | |
6397 | return -EINVAL; | |
6398 | } | |
6399 | ||
6400 | tmp &= bits->mask; | |
6401 | ||
6402 | return (tmp == bits->val) ? 1 : 0; | |
6403 | } | |
9b847548 | 6404 | |
6ffa01d8 | 6405 | #ifdef CONFIG_PM |
3c5100c1 | 6406 | void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) |
9b847548 JA |
6407 | { |
6408 | pci_save_state(pdev); | |
4c90d971 | 6409 | pci_disable_device(pdev); |
500530f6 | 6410 | |
3a2d5b70 | 6411 | if (mesg.event & PM_EVENT_SLEEP) |
500530f6 | 6412 | pci_set_power_state(pdev, PCI_D3hot); |
9b847548 JA |
6413 | } |
6414 | ||
553c4aa6 | 6415 | int ata_pci_device_do_resume(struct pci_dev *pdev) |
9b847548 | 6416 | { |
553c4aa6 TH |
6417 | int rc; |
6418 | ||
9b847548 JA |
6419 | pci_set_power_state(pdev, PCI_D0); |
6420 | pci_restore_state(pdev); | |
553c4aa6 | 6421 | |
b878ca5d | 6422 | rc = pcim_enable_device(pdev); |
553c4aa6 TH |
6423 | if (rc) { |
6424 | dev_printk(KERN_ERR, &pdev->dev, | |
6425 | "failed to enable device after resume (%d)\n", rc); | |
6426 | return rc; | |
6427 | } | |
6428 | ||
9b847548 | 6429 | pci_set_master(pdev); |
553c4aa6 | 6430 | return 0; |
500530f6 TH |
6431 | } |
6432 | ||
3c5100c1 | 6433 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) |
500530f6 | 6434 | { |
cca3974e | 6435 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
500530f6 TH |
6436 | int rc = 0; |
6437 | ||
cca3974e | 6438 | rc = ata_host_suspend(host, mesg); |
500530f6 TH |
6439 | if (rc) |
6440 | return rc; | |
6441 | ||
3c5100c1 | 6442 | ata_pci_device_do_suspend(pdev, mesg); |
500530f6 TH |
6443 | |
6444 | return 0; | |
6445 | } | |
6446 | ||
6447 | int ata_pci_device_resume(struct pci_dev *pdev) | |
6448 | { | |
cca3974e | 6449 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
553c4aa6 | 6450 | int rc; |
500530f6 | 6451 | |
553c4aa6 TH |
6452 | rc = ata_pci_device_do_resume(pdev); |
6453 | if (rc == 0) | |
6454 | ata_host_resume(host); | |
6455 | return rc; | |
9b847548 | 6456 | } |
6ffa01d8 TH |
6457 | #endif /* CONFIG_PM */ |
6458 | ||
1da177e4 LT |
6459 | #endif /* CONFIG_PCI */ |
6460 | ||
33267325 TH |
6461 | static int __init ata_parse_force_one(char **cur, |
6462 | struct ata_force_ent *force_ent, | |
6463 | const char **reason) | |
6464 | { | |
6465 | /* FIXME: Currently, there's no way to tag init const data and | |
6466 | * using __initdata causes build failure on some versions of | |
6467 | * gcc. Once __initdataconst is implemented, add const to the | |
6468 | * following structure. | |
6469 | */ | |
6470 | static struct ata_force_param force_tbl[] __initdata = { | |
6471 | { "40c", .cbl = ATA_CBL_PATA40 }, | |
6472 | { "80c", .cbl = ATA_CBL_PATA80 }, | |
6473 | { "short40c", .cbl = ATA_CBL_PATA40_SHORT }, | |
6474 | { "unk", .cbl = ATA_CBL_PATA_UNK }, | |
6475 | { "ign", .cbl = ATA_CBL_PATA_IGN }, | |
6476 | { "sata", .cbl = ATA_CBL_SATA }, | |
6477 | { "1.5Gbps", .spd_limit = 1 }, | |
6478 | { "3.0Gbps", .spd_limit = 2 }, | |
6479 | { "noncq", .horkage_on = ATA_HORKAGE_NONCQ }, | |
6480 | { "ncq", .horkage_off = ATA_HORKAGE_NONCQ }, | |
6481 | { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) }, | |
6482 | { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) }, | |
6483 | { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) }, | |
6484 | { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) }, | |
6485 | { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) }, | |
6486 | { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) }, | |
6487 | { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) }, | |
6488 | { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) }, | |
6489 | { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) }, | |
6490 | { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) }, | |
6491 | { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) }, | |
6492 | { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) }, | |
6493 | { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
6494 | { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
6495 | { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
6496 | { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
6497 | { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
6498 | { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
6499 | { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
6500 | { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
6501 | { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
6502 | { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
6503 | { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
6504 | { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
6505 | { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
6506 | { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
6507 | { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
6508 | { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
6509 | { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
6510 | { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
6511 | { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
6512 | { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
6513 | { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
6514 | { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) }, | |
05944bdf TH |
6515 | { "nohrst", .lflags = ATA_LFLAG_NO_HRST }, |
6516 | { "nosrst", .lflags = ATA_LFLAG_NO_SRST }, | |
6517 | { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST }, | |
33267325 TH |
6518 | }; |
6519 | char *start = *cur, *p = *cur; | |
6520 | char *id, *val, *endp; | |
6521 | const struct ata_force_param *match_fp = NULL; | |
6522 | int nr_matches = 0, i; | |
6523 | ||
6524 | /* find where this param ends and update *cur */ | |
6525 | while (*p != '\0' && *p != ',') | |
6526 | p++; | |
6527 | ||
6528 | if (*p == '\0') | |
6529 | *cur = p; | |
6530 | else | |
6531 | *cur = p + 1; | |
6532 | ||
6533 | *p = '\0'; | |
6534 | ||
6535 | /* parse */ | |
6536 | p = strchr(start, ':'); | |
6537 | if (!p) { | |
6538 | val = strstrip(start); | |
6539 | goto parse_val; | |
6540 | } | |
6541 | *p = '\0'; | |
6542 | ||
6543 | id = strstrip(start); | |
6544 | val = strstrip(p + 1); | |
6545 | ||
6546 | /* parse id */ | |
6547 | p = strchr(id, '.'); | |
6548 | if (p) { | |
6549 | *p++ = '\0'; | |
6550 | force_ent->device = simple_strtoul(p, &endp, 10); | |
6551 | if (p == endp || *endp != '\0') { | |
6552 | *reason = "invalid device"; | |
6553 | return -EINVAL; | |
6554 | } | |
6555 | } | |
6556 | ||
6557 | force_ent->port = simple_strtoul(id, &endp, 10); | |
6558 | if (p == endp || *endp != '\0') { | |
6559 | *reason = "invalid port/link"; | |
6560 | return -EINVAL; | |
6561 | } | |
6562 | ||
6563 | parse_val: | |
6564 | /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */ | |
6565 | for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { | |
6566 | const struct ata_force_param *fp = &force_tbl[i]; | |
6567 | ||
6568 | if (strncasecmp(val, fp->name, strlen(val))) | |
6569 | continue; | |
6570 | ||
6571 | nr_matches++; | |
6572 | match_fp = fp; | |
6573 | ||
6574 | if (strcasecmp(val, fp->name) == 0) { | |
6575 | nr_matches = 1; | |
6576 | break; | |
6577 | } | |
6578 | } | |
6579 | ||
6580 | if (!nr_matches) { | |
6581 | *reason = "unknown value"; | |
6582 | return -EINVAL; | |
6583 | } | |
6584 | if (nr_matches > 1) { | |
6585 | *reason = "ambigious value"; | |
6586 | return -EINVAL; | |
6587 | } | |
6588 | ||
6589 | force_ent->param = *match_fp; | |
6590 | ||
6591 | return 0; | |
6592 | } | |
6593 | ||
6594 | static void __init ata_parse_force_param(void) | |
6595 | { | |
6596 | int idx = 0, size = 1; | |
6597 | int last_port = -1, last_device = -1; | |
6598 | char *p, *cur, *next; | |
6599 | ||
6600 | /* calculate maximum number of params and allocate force_tbl */ | |
6601 | for (p = ata_force_param_buf; *p; p++) | |
6602 | if (*p == ',') | |
6603 | size++; | |
6604 | ||
6605 | ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL); | |
6606 | if (!ata_force_tbl) { | |
6607 | printk(KERN_WARNING "ata: failed to extend force table, " | |
6608 | "libata.force ignored\n"); | |
6609 | return; | |
6610 | } | |
6611 | ||
6612 | /* parse and populate the table */ | |
6613 | for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { | |
6614 | const char *reason = ""; | |
6615 | struct ata_force_ent te = { .port = -1, .device = -1 }; | |
6616 | ||
6617 | next = cur; | |
6618 | if (ata_parse_force_one(&next, &te, &reason)) { | |
6619 | printk(KERN_WARNING "ata: failed to parse force " | |
6620 | "parameter \"%s\" (%s)\n", | |
6621 | cur, reason); | |
6622 | continue; | |
6623 | } | |
6624 | ||
6625 | if (te.port == -1) { | |
6626 | te.port = last_port; | |
6627 | te.device = last_device; | |
6628 | } | |
6629 | ||
6630 | ata_force_tbl[idx++] = te; | |
6631 | ||
6632 | last_port = te.port; | |
6633 | last_device = te.device; | |
6634 | } | |
6635 | ||
6636 | ata_force_tbl_size = idx; | |
6637 | } | |
1da177e4 | 6638 | |
1da177e4 LT |
6639 | static int __init ata_init(void) |
6640 | { | |
33267325 TH |
6641 | ata_parse_force_param(); |
6642 | ||
9cd13bdb BZ |
6643 | /* |
6644 | * FIXME: In UP case, there is only one workqueue thread and if you | |
6645 | * have more than one PIO device, latency is bloody awful, with | |
6646 | * occasional multi-second "hiccups" as one PIO device waits for | |
6647 | * another. It's an ugly wart that users DO occasionally complain | |
6648 | * about; luckily most users have at most one PIO polled device. | |
6649 | */ | |
1da177e4 LT |
6650 | ata_wq = create_workqueue("ata"); |
6651 | if (!ata_wq) | |
49ea3b04 | 6652 | goto free_force_tbl; |
1da177e4 | 6653 | |
453b07ac | 6654 | ata_aux_wq = create_singlethread_workqueue("ata_aux"); |
49ea3b04 EO |
6655 | if (!ata_aux_wq) |
6656 | goto free_wq; | |
453b07ac | 6657 | |
1da177e4 LT |
6658 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
6659 | return 0; | |
49ea3b04 EO |
6660 | |
6661 | free_wq: | |
6662 | destroy_workqueue(ata_wq); | |
6663 | free_force_tbl: | |
6664 | kfree(ata_force_tbl); | |
6665 | return -ENOMEM; | |
1da177e4 LT |
6666 | } |
6667 | ||
6668 | static void __exit ata_exit(void) | |
6669 | { | |
33267325 | 6670 | kfree(ata_force_tbl); |
1da177e4 | 6671 | destroy_workqueue(ata_wq); |
453b07ac | 6672 | destroy_workqueue(ata_aux_wq); |
1da177e4 LT |
6673 | } |
6674 | ||
a4625085 | 6675 | subsys_initcall(ata_init); |
1da177e4 LT |
6676 | module_exit(ata_exit); |
6677 | ||
67846b30 | 6678 | static unsigned long ratelimit_time; |
34af946a | 6679 | static DEFINE_SPINLOCK(ata_ratelimit_lock); |
67846b30 JG |
6680 | |
6681 | int ata_ratelimit(void) | |
6682 | { | |
6683 | int rc; | |
6684 | unsigned long flags; | |
6685 | ||
6686 | spin_lock_irqsave(&ata_ratelimit_lock, flags); | |
6687 | ||
6688 | if (time_after(jiffies, ratelimit_time)) { | |
6689 | rc = 1; | |
6690 | ratelimit_time = jiffies + (HZ/5); | |
6691 | } else | |
6692 | rc = 0; | |
6693 | ||
6694 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); | |
6695 | ||
6696 | return rc; | |
6697 | } | |
6698 | ||
c22daff4 TH |
6699 | /** |
6700 | * ata_wait_register - wait until register value changes | |
6701 | * @reg: IO-mapped register | |
6702 | * @mask: Mask to apply to read register value | |
6703 | * @val: Wait condition | |
341c2c95 TH |
6704 | * @interval: polling interval in milliseconds |
6705 | * @timeout: timeout in milliseconds | |
c22daff4 TH |
6706 | * |
6707 | * Waiting for some bits of register to change is a common | |
6708 | * operation for ATA controllers. This function reads 32bit LE | |
6709 | * IO-mapped register @reg and tests for the following condition. | |
6710 | * | |
6711 | * (*@reg & mask) != val | |
6712 | * | |
6713 | * If the condition is met, it returns; otherwise, the process is | |
6714 | * repeated after @interval_msec until timeout. | |
6715 | * | |
6716 | * LOCKING: | |
6717 | * Kernel thread context (may sleep) | |
6718 | * | |
6719 | * RETURNS: | |
6720 | * The final register value. | |
6721 | */ | |
6722 | u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, | |
341c2c95 | 6723 | unsigned long interval, unsigned long timeout) |
c22daff4 | 6724 | { |
341c2c95 | 6725 | unsigned long deadline; |
c22daff4 TH |
6726 | u32 tmp; |
6727 | ||
6728 | tmp = ioread32(reg); | |
6729 | ||
6730 | /* Calculate timeout _after_ the first read to make sure | |
6731 | * preceding writes reach the controller before starting to | |
6732 | * eat away the timeout. | |
6733 | */ | |
341c2c95 | 6734 | deadline = ata_deadline(jiffies, timeout); |
c22daff4 | 6735 | |
341c2c95 TH |
6736 | while ((tmp & mask) == val && time_before(jiffies, deadline)) { |
6737 | msleep(interval); | |
c22daff4 TH |
6738 | tmp = ioread32(reg); |
6739 | } | |
6740 | ||
6741 | return tmp; | |
6742 | } | |
6743 | ||
dd5b06c4 TH |
6744 | /* |
6745 | * Dummy port_ops | |
6746 | */ | |
182d7bba | 6747 | static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) |
dd5b06c4 | 6748 | { |
182d7bba | 6749 | return AC_ERR_SYSTEM; |
dd5b06c4 TH |
6750 | } |
6751 | ||
182d7bba | 6752 | static void ata_dummy_error_handler(struct ata_port *ap) |
dd5b06c4 | 6753 | { |
182d7bba | 6754 | /* truly dummy */ |
dd5b06c4 TH |
6755 | } |
6756 | ||
029cfd6b | 6757 | struct ata_port_operations ata_dummy_port_ops = { |
dd5b06c4 TH |
6758 | .qc_prep = ata_noop_qc_prep, |
6759 | .qc_issue = ata_dummy_qc_issue, | |
182d7bba | 6760 | .error_handler = ata_dummy_error_handler, |
dd5b06c4 TH |
6761 | }; |
6762 | ||
21b0ad4f TH |
6763 | const struct ata_port_info ata_dummy_port_info = { |
6764 | .port_ops = &ata_dummy_port_ops, | |
6765 | }; | |
6766 | ||
1da177e4 LT |
6767 | /* |
6768 | * libata is essentially a library of internal helper functions for | |
6769 | * low-level ATA host controller drivers. As such, the API/ABI is | |
6770 | * likely to change as new drivers are added and updated. | |
6771 | * Do not depend on ABI/API stability. | |
6772 | */ | |
e9c83914 TH |
6773 | EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
6774 | EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); | |
6775 | EXPORT_SYMBOL_GPL(sata_deb_timing_long); | |
029cfd6b TH |
6776 | EXPORT_SYMBOL_GPL(ata_base_port_ops); |
6777 | EXPORT_SYMBOL_GPL(sata_port_ops); | |
dd5b06c4 | 6778 | EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
21b0ad4f | 6779 | EXPORT_SYMBOL_GPL(ata_dummy_port_info); |
1eca4365 TH |
6780 | EXPORT_SYMBOL_GPL(ata_link_next); |
6781 | EXPORT_SYMBOL_GPL(ata_dev_next); | |
1da177e4 | 6782 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
cca3974e | 6783 | EXPORT_SYMBOL_GPL(ata_host_init); |
f3187195 | 6784 | EXPORT_SYMBOL_GPL(ata_host_alloc); |
f5cda257 | 6785 | EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); |
b1c72916 | 6786 | EXPORT_SYMBOL_GPL(ata_slave_link_init); |
ecef7253 | 6787 | EXPORT_SYMBOL_GPL(ata_host_start); |
f3187195 | 6788 | EXPORT_SYMBOL_GPL(ata_host_register); |
f5cda257 | 6789 | EXPORT_SYMBOL_GPL(ata_host_activate); |
0529c159 | 6790 | EXPORT_SYMBOL_GPL(ata_host_detach); |
1da177e4 | 6791 | EXPORT_SYMBOL_GPL(ata_sg_init); |
f686bcb8 | 6792 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
dedaf2b0 | 6793 | EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); |
436d34b3 | 6794 | EXPORT_SYMBOL_GPL(atapi_cmd_type); |
1da177e4 LT |
6795 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
6796 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
6357357c TH |
6797 | EXPORT_SYMBOL_GPL(ata_pack_xfermask); |
6798 | EXPORT_SYMBOL_GPL(ata_unpack_xfermask); | |
6799 | EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); | |
6800 | EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); | |
6801 | EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); | |
6802 | EXPORT_SYMBOL_GPL(ata_mode_string); | |
6803 | EXPORT_SYMBOL_GPL(ata_id_xfermask); | |
1da177e4 | 6804 | EXPORT_SYMBOL_GPL(ata_port_start); |
04351821 | 6805 | EXPORT_SYMBOL_GPL(ata_do_set_mode); |
31cc23b3 | 6806 | EXPORT_SYMBOL_GPL(ata_std_qc_defer); |
e46834cd | 6807 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
1da177e4 | 6808 | EXPORT_SYMBOL_GPL(ata_port_probe); |
10305f0f | 6809 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
3c567b7d | 6810 | EXPORT_SYMBOL_GPL(sata_set_spd); |
aa2731ad | 6811 | EXPORT_SYMBOL_GPL(ata_wait_after_reset); |
936fd732 TH |
6812 | EXPORT_SYMBOL_GPL(sata_link_debounce); |
6813 | EXPORT_SYMBOL_GPL(sata_link_resume); | |
0aa1113d | 6814 | EXPORT_SYMBOL_GPL(ata_std_prereset); |
cc0680a5 | 6815 | EXPORT_SYMBOL_GPL(sata_link_hardreset); |
57c9efdf | 6816 | EXPORT_SYMBOL_GPL(sata_std_hardreset); |
203c75b8 | 6817 | EXPORT_SYMBOL_GPL(ata_std_postreset); |
2e9edbf8 JG |
6818 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
6819 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
1da177e4 | 6820 | EXPORT_SYMBOL_GPL(ata_port_disable); |
67846b30 | 6821 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
c22daff4 | 6822 | EXPORT_SYMBOL_GPL(ata_wait_register); |
1da177e4 | 6823 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); |
1da177e4 | 6824 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
83c47bcb | 6825 | EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); |
a6e6ce8e | 6826 | EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); |
34bf2170 TH |
6827 | EXPORT_SYMBOL_GPL(sata_scr_valid); |
6828 | EXPORT_SYMBOL_GPL(sata_scr_read); | |
6829 | EXPORT_SYMBOL_GPL(sata_scr_write); | |
6830 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); | |
936fd732 TH |
6831 | EXPORT_SYMBOL_GPL(ata_link_online); |
6832 | EXPORT_SYMBOL_GPL(ata_link_offline); | |
6ffa01d8 | 6833 | #ifdef CONFIG_PM |
cca3974e JG |
6834 | EXPORT_SYMBOL_GPL(ata_host_suspend); |
6835 | EXPORT_SYMBOL_GPL(ata_host_resume); | |
6ffa01d8 | 6836 | #endif /* CONFIG_PM */ |
6a62a04d TH |
6837 | EXPORT_SYMBOL_GPL(ata_id_string); |
6838 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
963e4975 | 6839 | EXPORT_SYMBOL_GPL(ata_do_dev_read_id); |
1da177e4 LT |
6840 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
6841 | ||
1a660164 | 6842 | EXPORT_SYMBOL_GPL(ata_pio_queue_task); |
1bc4ccff | 6843 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
6357357c | 6844 | EXPORT_SYMBOL_GPL(ata_timing_find_mode); |
452503f9 AC |
6845 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
6846 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
a0f79b92 | 6847 | EXPORT_SYMBOL_GPL(ata_timing_cycle2mode); |
452503f9 | 6848 | |
1da177e4 LT |
6849 | #ifdef CONFIG_PCI |
6850 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
1da177e4 | 6851 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); |
6ffa01d8 | 6852 | #ifdef CONFIG_PM |
500530f6 TH |
6853 | EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
6854 | EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); | |
9b847548 JA |
6855 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
6856 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
6ffa01d8 | 6857 | #endif /* CONFIG_PM */ |
1da177e4 | 6858 | #endif /* CONFIG_PCI */ |
9b847548 | 6859 | |
b64bbc39 TH |
6860 | EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); |
6861 | EXPORT_SYMBOL_GPL(ata_ehi_push_desc); | |
6862 | EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); | |
cbcdd875 TH |
6863 | EXPORT_SYMBOL_GPL(ata_port_desc); |
6864 | #ifdef CONFIG_PCI | |
6865 | EXPORT_SYMBOL_GPL(ata_port_pbar_desc); | |
6866 | #endif /* CONFIG_PCI */ | |
7b70fc03 | 6867 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
dbd82616 | 6868 | EXPORT_SYMBOL_GPL(ata_link_abort); |
7b70fc03 | 6869 | EXPORT_SYMBOL_GPL(ata_port_abort); |
e3180499 | 6870 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
7d77b247 | 6871 | EXPORT_SYMBOL_GPL(sata_async_notification); |
e3180499 TH |
6872 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
6873 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); | |
ece1d636 TH |
6874 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
6875 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
10acf3b0 | 6876 | EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error); |
022bdb07 | 6877 | EXPORT_SYMBOL_GPL(ata_do_eh); |
a1efdaba | 6878 | EXPORT_SYMBOL_GPL(ata_std_error_handler); |
be0d18df AC |
6879 | |
6880 | EXPORT_SYMBOL_GPL(ata_cable_40wire); | |
6881 | EXPORT_SYMBOL_GPL(ata_cable_80wire); | |
6882 | EXPORT_SYMBOL_GPL(ata_cable_unknown); | |
c88f90c3 | 6883 | EXPORT_SYMBOL_GPL(ata_cable_ignore); |
be0d18df | 6884 | EXPORT_SYMBOL_GPL(ata_cable_sata); |