Commit | Line | Data |
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1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-core.c - helper library for ATA |
3 | * | |
8c3d3d4b | 4 | * Maintained by: Tejun Heo <tj@kernel.org> |
af36d7f0 JG |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from http://www.t13.org/ and | |
31 | * http://www.sata-io.org/ | |
32 | * | |
92c52c52 AC |
33 | * Standards documents from: |
34 | * http://www.t13.org (ATA standards, PCI DMA IDE spec) | |
35 | * http://www.t10.org (SCSI MMC - for ATAPI MMC) | |
36 | * http://www.sata-io.org (SATA) | |
37 | * http://www.compactflash.org (CF) | |
38 | * http://www.qic.org (QIC157 - Tape and DSC) | |
39 | * http://www.ce-ata.org (CE-ATA: not supported) | |
40 | * | |
1da177e4 LT |
41 | */ |
42 | ||
1da177e4 LT |
43 | #include <linux/kernel.h> |
44 | #include <linux/module.h> | |
45 | #include <linux/pci.h> | |
46 | #include <linux/init.h> | |
47 | #include <linux/list.h> | |
48 | #include <linux/mm.h> | |
1da177e4 LT |
49 | #include <linux/spinlock.h> |
50 | #include <linux/blkdev.h> | |
51 | #include <linux/delay.h> | |
52 | #include <linux/timer.h> | |
53 | #include <linux/interrupt.h> | |
54 | #include <linux/completion.h> | |
55 | #include <linux/suspend.h> | |
56 | #include <linux/workqueue.h> | |
378f058c | 57 | #include <linux/scatterlist.h> |
2dcb407e | 58 | #include <linux/io.h> |
79318057 | 59 | #include <linux/async.h> |
e18086d6 | 60 | #include <linux/log2.h> |
5a0e3ad6 | 61 | #include <linux/slab.h> |
428ac5fc | 62 | #include <linux/glob.h> |
1da177e4 | 63 | #include <scsi/scsi.h> |
193515d5 | 64 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
65 | #include <scsi/scsi_host.h> |
66 | #include <linux/libata.h> | |
1da177e4 | 67 | #include <asm/byteorder.h> |
140b5e59 | 68 | #include <linux/cdrom.h> |
9990b6f3 | 69 | #include <linux/ratelimit.h> |
9ee4f393 | 70 | #include <linux/pm_runtime.h> |
b7db04d9 | 71 | #include <linux/platform_device.h> |
1da177e4 LT |
72 | |
73 | #include "libata.h" | |
d9027470 | 74 | #include "libata-transport.h" |
fda0efc5 | 75 | |
d7bb4cc7 | 76 | /* debounce timing parameters in msecs { interval, duration, timeout } */ |
e9c83914 TH |
77 | const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; |
78 | const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; | |
79 | const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; | |
d7bb4cc7 | 80 | |
029cfd6b | 81 | const struct ata_port_operations ata_base_port_ops = { |
0aa1113d | 82 | .prereset = ata_std_prereset, |
203c75b8 | 83 | .postreset = ata_std_postreset, |
a1efdaba | 84 | .error_handler = ata_std_error_handler, |
e4a9c373 DW |
85 | .sched_eh = ata_std_sched_eh, |
86 | .end_eh = ata_std_end_eh, | |
029cfd6b TH |
87 | }; |
88 | ||
89 | const struct ata_port_operations sata_port_ops = { | |
90 | .inherits = &ata_base_port_ops, | |
91 | ||
92 | .qc_defer = ata_std_qc_defer, | |
57c9efdf | 93 | .hardreset = sata_std_hardreset, |
029cfd6b TH |
94 | }; |
95 | ||
3373efd8 TH |
96 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
97 | u16 heads, u16 sectors); | |
98 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev); | |
99 | static void ata_dev_xfermask(struct ata_device *dev); | |
75683fe7 | 100 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev); |
1da177e4 | 101 | |
a78f57af | 102 | atomic_t ata_print_id = ATOMIC_INIT(0); |
1da177e4 | 103 | |
33267325 TH |
104 | struct ata_force_param { |
105 | const char *name; | |
106 | unsigned int cbl; | |
107 | int spd_limit; | |
108 | unsigned long xfer_mask; | |
109 | unsigned int horkage_on; | |
110 | unsigned int horkage_off; | |
05944bdf | 111 | unsigned int lflags; |
33267325 TH |
112 | }; |
113 | ||
114 | struct ata_force_ent { | |
115 | int port; | |
116 | int device; | |
117 | struct ata_force_param param; | |
118 | }; | |
119 | ||
120 | static struct ata_force_ent *ata_force_tbl; | |
121 | static int ata_force_tbl_size; | |
122 | ||
123 | static char ata_force_param_buf[PAGE_SIZE] __initdata; | |
7afb4222 TH |
124 | /* param_buf is thrown away after initialization, disallow read */ |
125 | module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); | |
33267325 TH |
126 | MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)"); |
127 | ||
2486fa56 | 128 | static int atapi_enabled = 1; |
1623c81e | 129 | module_param(atapi_enabled, int, 0444); |
ad5d8eac | 130 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])"); |
1623c81e | 131 | |
c5c61bda | 132 | static int atapi_dmadir = 0; |
95de719a | 133 | module_param(atapi_dmadir, int, 0444); |
ad5d8eac | 134 | MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)"); |
95de719a | 135 | |
baf4fdfa ML |
136 | int atapi_passthru16 = 1; |
137 | module_param(atapi_passthru16, int, 0444); | |
ad5d8eac | 138 | MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])"); |
baf4fdfa | 139 | |
c3c013a2 JG |
140 | int libata_fua = 0; |
141 | module_param_named(fua, libata_fua, int, 0444); | |
ad5d8eac | 142 | MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)"); |
c3c013a2 | 143 | |
2dcb407e | 144 | static int ata_ignore_hpa; |
1e999736 AC |
145 | module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); |
146 | MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); | |
147 | ||
b3a70601 AC |
148 | static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; |
149 | module_param_named(dma, libata_dma_mask, int, 0444); | |
150 | MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); | |
151 | ||
87fbc5a0 | 152 | static int ata_probe_timeout; |
a8601e5f AM |
153 | module_param(ata_probe_timeout, int, 0444); |
154 | MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); | |
155 | ||
6ebe9d86 | 156 | int libata_noacpi = 0; |
d7d0dad6 | 157 | module_param_named(noacpi, libata_noacpi, int, 0444); |
ad5d8eac | 158 | MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)"); |
11ef697b | 159 | |
ae8d4ee7 AC |
160 | int libata_allow_tpm = 0; |
161 | module_param_named(allow_tpm, libata_allow_tpm, int, 0444); | |
ad5d8eac | 162 | MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)"); |
ae8d4ee7 | 163 | |
e7ecd435 TH |
164 | static int atapi_an; |
165 | module_param(atapi_an, int, 0444); | |
166 | MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)"); | |
167 | ||
1da177e4 LT |
168 | MODULE_AUTHOR("Jeff Garzik"); |
169 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
170 | MODULE_LICENSE("GPL"); | |
171 | MODULE_VERSION(DRV_VERSION); | |
172 | ||
0baab86b | 173 | |
9913ff8a TH |
174 | static bool ata_sstatus_online(u32 sstatus) |
175 | { | |
176 | return (sstatus & 0xf) == 0x3; | |
177 | } | |
178 | ||
1eca4365 TH |
179 | /** |
180 | * ata_link_next - link iteration helper | |
181 | * @link: the previous link, NULL to start | |
182 | * @ap: ATA port containing links to iterate | |
183 | * @mode: iteration mode, one of ATA_LITER_* | |
184 | * | |
185 | * LOCKING: | |
186 | * Host lock or EH context. | |
aadffb68 | 187 | * |
1eca4365 TH |
188 | * RETURNS: |
189 | * Pointer to the next link. | |
aadffb68 | 190 | */ |
1eca4365 TH |
191 | struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap, |
192 | enum ata_link_iter_mode mode) | |
aadffb68 | 193 | { |
1eca4365 TH |
194 | BUG_ON(mode != ATA_LITER_EDGE && |
195 | mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST); | |
196 | ||
aadffb68 | 197 | /* NULL link indicates start of iteration */ |
1eca4365 TH |
198 | if (!link) |
199 | switch (mode) { | |
200 | case ATA_LITER_EDGE: | |
201 | case ATA_LITER_PMP_FIRST: | |
202 | if (sata_pmp_attached(ap)) | |
203 | return ap->pmp_link; | |
204 | /* fall through */ | |
205 | case ATA_LITER_HOST_FIRST: | |
206 | return &ap->link; | |
207 | } | |
aadffb68 | 208 | |
1eca4365 TH |
209 | /* we just iterated over the host link, what's next? */ |
210 | if (link == &ap->link) | |
211 | switch (mode) { | |
212 | case ATA_LITER_HOST_FIRST: | |
213 | if (sata_pmp_attached(ap)) | |
214 | return ap->pmp_link; | |
215 | /* fall through */ | |
216 | case ATA_LITER_PMP_FIRST: | |
217 | if (unlikely(ap->slave_link)) | |
b1c72916 | 218 | return ap->slave_link; |
1eca4365 TH |
219 | /* fall through */ |
220 | case ATA_LITER_EDGE: | |
aadffb68 | 221 | return NULL; |
b1c72916 | 222 | } |
aadffb68 | 223 | |
b1c72916 TH |
224 | /* slave_link excludes PMP */ |
225 | if (unlikely(link == ap->slave_link)) | |
226 | return NULL; | |
227 | ||
1eca4365 | 228 | /* we were over a PMP link */ |
aadffb68 TH |
229 | if (++link < ap->pmp_link + ap->nr_pmp_links) |
230 | return link; | |
1eca4365 TH |
231 | |
232 | if (mode == ATA_LITER_PMP_FIRST) | |
233 | return &ap->link; | |
234 | ||
aadffb68 TH |
235 | return NULL; |
236 | } | |
237 | ||
1eca4365 TH |
238 | /** |
239 | * ata_dev_next - device iteration helper | |
240 | * @dev: the previous device, NULL to start | |
241 | * @link: ATA link containing devices to iterate | |
242 | * @mode: iteration mode, one of ATA_DITER_* | |
243 | * | |
244 | * LOCKING: | |
245 | * Host lock or EH context. | |
246 | * | |
247 | * RETURNS: | |
248 | * Pointer to the next device. | |
249 | */ | |
250 | struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link, | |
251 | enum ata_dev_iter_mode mode) | |
252 | { | |
253 | BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE && | |
254 | mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE); | |
255 | ||
256 | /* NULL dev indicates start of iteration */ | |
257 | if (!dev) | |
258 | switch (mode) { | |
259 | case ATA_DITER_ENABLED: | |
260 | case ATA_DITER_ALL: | |
261 | dev = link->device; | |
262 | goto check; | |
263 | case ATA_DITER_ENABLED_REVERSE: | |
264 | case ATA_DITER_ALL_REVERSE: | |
265 | dev = link->device + ata_link_max_devices(link) - 1; | |
266 | goto check; | |
267 | } | |
268 | ||
269 | next: | |
270 | /* move to the next one */ | |
271 | switch (mode) { | |
272 | case ATA_DITER_ENABLED: | |
273 | case ATA_DITER_ALL: | |
274 | if (++dev < link->device + ata_link_max_devices(link)) | |
275 | goto check; | |
276 | return NULL; | |
277 | case ATA_DITER_ENABLED_REVERSE: | |
278 | case ATA_DITER_ALL_REVERSE: | |
279 | if (--dev >= link->device) | |
280 | goto check; | |
281 | return NULL; | |
282 | } | |
283 | ||
284 | check: | |
285 | if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) && | |
286 | !ata_dev_enabled(dev)) | |
287 | goto next; | |
288 | return dev; | |
289 | } | |
290 | ||
b1c72916 TH |
291 | /** |
292 | * ata_dev_phys_link - find physical link for a device | |
293 | * @dev: ATA device to look up physical link for | |
294 | * | |
295 | * Look up physical link which @dev is attached to. Note that | |
296 | * this is different from @dev->link only when @dev is on slave | |
297 | * link. For all other cases, it's the same as @dev->link. | |
298 | * | |
299 | * LOCKING: | |
300 | * Don't care. | |
301 | * | |
302 | * RETURNS: | |
303 | * Pointer to the found physical link. | |
304 | */ | |
305 | struct ata_link *ata_dev_phys_link(struct ata_device *dev) | |
306 | { | |
307 | struct ata_port *ap = dev->link->ap; | |
308 | ||
309 | if (!ap->slave_link) | |
310 | return dev->link; | |
311 | if (!dev->devno) | |
312 | return &ap->link; | |
313 | return ap->slave_link; | |
314 | } | |
315 | ||
33267325 TH |
316 | /** |
317 | * ata_force_cbl - force cable type according to libata.force | |
4cdfa1b3 | 318 | * @ap: ATA port of interest |
33267325 TH |
319 | * |
320 | * Force cable type according to libata.force and whine about it. | |
321 | * The last entry which has matching port number is used, so it | |
322 | * can be specified as part of device force parameters. For | |
323 | * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the | |
324 | * same effect. | |
325 | * | |
326 | * LOCKING: | |
327 | * EH context. | |
328 | */ | |
329 | void ata_force_cbl(struct ata_port *ap) | |
330 | { | |
331 | int i; | |
332 | ||
333 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
334 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
335 | ||
336 | if (fe->port != -1 && fe->port != ap->print_id) | |
337 | continue; | |
338 | ||
339 | if (fe->param.cbl == ATA_CBL_NONE) | |
340 | continue; | |
341 | ||
342 | ap->cbl = fe->param.cbl; | |
a9a79dfe | 343 | ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name); |
33267325 TH |
344 | return; |
345 | } | |
346 | } | |
347 | ||
348 | /** | |
05944bdf | 349 | * ata_force_link_limits - force link limits according to libata.force |
33267325 TH |
350 | * @link: ATA link of interest |
351 | * | |
05944bdf TH |
352 | * Force link flags and SATA spd limit according to libata.force |
353 | * and whine about it. When only the port part is specified | |
354 | * (e.g. 1:), the limit applies to all links connected to both | |
355 | * the host link and all fan-out ports connected via PMP. If the | |
356 | * device part is specified as 0 (e.g. 1.00:), it specifies the | |
357 | * first fan-out link not the host link. Device number 15 always | |
b1c72916 TH |
358 | * points to the host link whether PMP is attached or not. If the |
359 | * controller has slave link, device number 16 points to it. | |
33267325 TH |
360 | * |
361 | * LOCKING: | |
362 | * EH context. | |
363 | */ | |
05944bdf | 364 | static void ata_force_link_limits(struct ata_link *link) |
33267325 | 365 | { |
05944bdf | 366 | bool did_spd = false; |
b1c72916 TH |
367 | int linkno = link->pmp; |
368 | int i; | |
33267325 TH |
369 | |
370 | if (ata_is_host_link(link)) | |
b1c72916 | 371 | linkno += 15; |
33267325 TH |
372 | |
373 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
374 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
375 | ||
376 | if (fe->port != -1 && fe->port != link->ap->print_id) | |
377 | continue; | |
378 | ||
379 | if (fe->device != -1 && fe->device != linkno) | |
380 | continue; | |
381 | ||
05944bdf TH |
382 | /* only honor the first spd limit */ |
383 | if (!did_spd && fe->param.spd_limit) { | |
384 | link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; | |
a9a79dfe | 385 | ata_link_notice(link, "FORCE: PHY spd limit set to %s\n", |
05944bdf TH |
386 | fe->param.name); |
387 | did_spd = true; | |
388 | } | |
33267325 | 389 | |
05944bdf TH |
390 | /* let lflags stack */ |
391 | if (fe->param.lflags) { | |
392 | link->flags |= fe->param.lflags; | |
a9a79dfe | 393 | ata_link_notice(link, |
05944bdf TH |
394 | "FORCE: link flag 0x%x forced -> 0x%x\n", |
395 | fe->param.lflags, link->flags); | |
396 | } | |
33267325 TH |
397 | } |
398 | } | |
399 | ||
400 | /** | |
401 | * ata_force_xfermask - force xfermask according to libata.force | |
402 | * @dev: ATA device of interest | |
403 | * | |
404 | * Force xfer_mask according to libata.force and whine about it. | |
405 | * For consistency with link selection, device number 15 selects | |
406 | * the first device connected to the host link. | |
407 | * | |
408 | * LOCKING: | |
409 | * EH context. | |
410 | */ | |
411 | static void ata_force_xfermask(struct ata_device *dev) | |
412 | { | |
413 | int devno = dev->link->pmp + dev->devno; | |
414 | int alt_devno = devno; | |
415 | int i; | |
416 | ||
b1c72916 TH |
417 | /* allow n.15/16 for devices attached to host port */ |
418 | if (ata_is_host_link(dev->link)) | |
419 | alt_devno += 15; | |
33267325 TH |
420 | |
421 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
422 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
423 | unsigned long pio_mask, mwdma_mask, udma_mask; | |
424 | ||
425 | if (fe->port != -1 && fe->port != dev->link->ap->print_id) | |
426 | continue; | |
427 | ||
428 | if (fe->device != -1 && fe->device != devno && | |
429 | fe->device != alt_devno) | |
430 | continue; | |
431 | ||
432 | if (!fe->param.xfer_mask) | |
433 | continue; | |
434 | ||
435 | ata_unpack_xfermask(fe->param.xfer_mask, | |
436 | &pio_mask, &mwdma_mask, &udma_mask); | |
437 | if (udma_mask) | |
438 | dev->udma_mask = udma_mask; | |
439 | else if (mwdma_mask) { | |
440 | dev->udma_mask = 0; | |
441 | dev->mwdma_mask = mwdma_mask; | |
442 | } else { | |
443 | dev->udma_mask = 0; | |
444 | dev->mwdma_mask = 0; | |
445 | dev->pio_mask = pio_mask; | |
446 | } | |
447 | ||
a9a79dfe JP |
448 | ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n", |
449 | fe->param.name); | |
33267325 TH |
450 | return; |
451 | } | |
452 | } | |
453 | ||
454 | /** | |
455 | * ata_force_horkage - force horkage according to libata.force | |
456 | * @dev: ATA device of interest | |
457 | * | |
458 | * Force horkage according to libata.force and whine about it. | |
459 | * For consistency with link selection, device number 15 selects | |
460 | * the first device connected to the host link. | |
461 | * | |
462 | * LOCKING: | |
463 | * EH context. | |
464 | */ | |
465 | static void ata_force_horkage(struct ata_device *dev) | |
466 | { | |
467 | int devno = dev->link->pmp + dev->devno; | |
468 | int alt_devno = devno; | |
469 | int i; | |
470 | ||
b1c72916 TH |
471 | /* allow n.15/16 for devices attached to host port */ |
472 | if (ata_is_host_link(dev->link)) | |
473 | alt_devno += 15; | |
33267325 TH |
474 | |
475 | for (i = 0; i < ata_force_tbl_size; i++) { | |
476 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
477 | ||
478 | if (fe->port != -1 && fe->port != dev->link->ap->print_id) | |
479 | continue; | |
480 | ||
481 | if (fe->device != -1 && fe->device != devno && | |
482 | fe->device != alt_devno) | |
483 | continue; | |
484 | ||
485 | if (!(~dev->horkage & fe->param.horkage_on) && | |
486 | !(dev->horkage & fe->param.horkage_off)) | |
487 | continue; | |
488 | ||
489 | dev->horkage |= fe->param.horkage_on; | |
490 | dev->horkage &= ~fe->param.horkage_off; | |
491 | ||
a9a79dfe JP |
492 | ata_dev_notice(dev, "FORCE: horkage modified (%s)\n", |
493 | fe->param.name); | |
33267325 TH |
494 | } |
495 | } | |
496 | ||
436d34b3 TH |
497 | /** |
498 | * atapi_cmd_type - Determine ATAPI command type from SCSI opcode | |
499 | * @opcode: SCSI opcode | |
500 | * | |
501 | * Determine ATAPI command type from @opcode. | |
502 | * | |
503 | * LOCKING: | |
504 | * None. | |
505 | * | |
506 | * RETURNS: | |
507 | * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC} | |
508 | */ | |
509 | int atapi_cmd_type(u8 opcode) | |
510 | { | |
511 | switch (opcode) { | |
512 | case GPCMD_READ_10: | |
513 | case GPCMD_READ_12: | |
514 | return ATAPI_READ; | |
515 | ||
516 | case GPCMD_WRITE_10: | |
517 | case GPCMD_WRITE_12: | |
518 | case GPCMD_WRITE_AND_VERIFY_10: | |
519 | return ATAPI_WRITE; | |
520 | ||
521 | case GPCMD_READ_CD: | |
522 | case GPCMD_READ_CD_MSF: | |
523 | return ATAPI_READ_CD; | |
524 | ||
e52dcc48 TH |
525 | case ATA_16: |
526 | case ATA_12: | |
527 | if (atapi_passthru16) | |
528 | return ATAPI_PASS_THRU; | |
529 | /* fall thru */ | |
436d34b3 TH |
530 | default: |
531 | return ATAPI_MISC; | |
532 | } | |
533 | } | |
534 | ||
1da177e4 LT |
535 | /** |
536 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
537 | * @tf: Taskfile to convert | |
1da177e4 | 538 | * @pmp: Port multiplier port |
9977126c TH |
539 | * @is_cmd: This FIS is for command |
540 | * @fis: Buffer into which data will output | |
1da177e4 LT |
541 | * |
542 | * Converts a standard ATA taskfile to a Serial ATA | |
543 | * FIS structure (Register - Host to Device). | |
544 | * | |
545 | * LOCKING: | |
546 | * Inherited from caller. | |
547 | */ | |
9977126c | 548 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) |
1da177e4 | 549 | { |
9977126c TH |
550 | fis[0] = 0x27; /* Register - Host to Device FIS */ |
551 | fis[1] = pmp & 0xf; /* Port multiplier number*/ | |
552 | if (is_cmd) | |
553 | fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ | |
554 | ||
1da177e4 LT |
555 | fis[2] = tf->command; |
556 | fis[3] = tf->feature; | |
557 | ||
558 | fis[4] = tf->lbal; | |
559 | fis[5] = tf->lbam; | |
560 | fis[6] = tf->lbah; | |
561 | fis[7] = tf->device; | |
562 | ||
563 | fis[8] = tf->hob_lbal; | |
564 | fis[9] = tf->hob_lbam; | |
565 | fis[10] = tf->hob_lbah; | |
566 | fis[11] = tf->hob_feature; | |
567 | ||
568 | fis[12] = tf->nsect; | |
569 | fis[13] = tf->hob_nsect; | |
570 | fis[14] = 0; | |
571 | fis[15] = tf->ctl; | |
572 | ||
86a565e6 MC |
573 | fis[16] = tf->auxiliary & 0xff; |
574 | fis[17] = (tf->auxiliary >> 8) & 0xff; | |
575 | fis[18] = (tf->auxiliary >> 16) & 0xff; | |
576 | fis[19] = (tf->auxiliary >> 24) & 0xff; | |
1da177e4 LT |
577 | } |
578 | ||
579 | /** | |
580 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
581 | * @fis: Buffer from which data will be input | |
582 | * @tf: Taskfile to output | |
583 | * | |
e12a1be6 | 584 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
585 | * |
586 | * LOCKING: | |
587 | * Inherited from caller. | |
588 | */ | |
589 | ||
057ace5e | 590 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
591 | { |
592 | tf->command = fis[2]; /* status */ | |
593 | tf->feature = fis[3]; /* error */ | |
594 | ||
595 | tf->lbal = fis[4]; | |
596 | tf->lbam = fis[5]; | |
597 | tf->lbah = fis[6]; | |
598 | tf->device = fis[7]; | |
599 | ||
600 | tf->hob_lbal = fis[8]; | |
601 | tf->hob_lbam = fis[9]; | |
602 | tf->hob_lbah = fis[10]; | |
603 | ||
604 | tf->nsect = fis[12]; | |
605 | tf->hob_nsect = fis[13]; | |
606 | } | |
607 | ||
8cbd6df1 AL |
608 | static const u8 ata_rw_cmds[] = { |
609 | /* pio multi */ | |
610 | ATA_CMD_READ_MULTI, | |
611 | ATA_CMD_WRITE_MULTI, | |
612 | ATA_CMD_READ_MULTI_EXT, | |
613 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
614 | 0, |
615 | 0, | |
616 | 0, | |
617 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
618 | /* pio */ |
619 | ATA_CMD_PIO_READ, | |
620 | ATA_CMD_PIO_WRITE, | |
621 | ATA_CMD_PIO_READ_EXT, | |
622 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
623 | 0, |
624 | 0, | |
625 | 0, | |
626 | 0, | |
8cbd6df1 AL |
627 | /* dma */ |
628 | ATA_CMD_READ, | |
629 | ATA_CMD_WRITE, | |
630 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
631 | ATA_CMD_WRITE_EXT, |
632 | 0, | |
633 | 0, | |
634 | 0, | |
635 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 636 | }; |
1da177e4 LT |
637 | |
638 | /** | |
8cbd6df1 | 639 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
bd056d7e TH |
640 | * @tf: command to examine and configure |
641 | * @dev: device tf belongs to | |
1da177e4 | 642 | * |
2e9edbf8 | 643 | * Examine the device configuration and tf->flags to calculate |
8cbd6df1 | 644 | * the proper read/write commands and protocol to use. |
1da177e4 LT |
645 | * |
646 | * LOCKING: | |
647 | * caller. | |
648 | */ | |
bd056d7e | 649 | static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) |
1da177e4 | 650 | { |
9a3dccc4 | 651 | u8 cmd; |
1da177e4 | 652 | |
9a3dccc4 | 653 | int index, fua, lba48, write; |
2e9edbf8 | 654 | |
9a3dccc4 | 655 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
656 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
657 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 658 | |
8cbd6df1 AL |
659 | if (dev->flags & ATA_DFLAG_PIO) { |
660 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 661 | index = dev->multi_count ? 0 : 8; |
9af5c9c9 | 662 | } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { |
8d238e01 AC |
663 | /* Unable to use DMA due to host limitation */ |
664 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 665 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
666 | } else { |
667 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 668 | index = 16; |
8cbd6df1 | 669 | } |
1da177e4 | 670 | |
9a3dccc4 TH |
671 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
672 | if (cmd) { | |
673 | tf->command = cmd; | |
674 | return 0; | |
675 | } | |
676 | return -1; | |
1da177e4 LT |
677 | } |
678 | ||
35b649fe TH |
679 | /** |
680 | * ata_tf_read_block - Read block address from ATA taskfile | |
681 | * @tf: ATA taskfile of interest | |
682 | * @dev: ATA device @tf belongs to | |
683 | * | |
684 | * LOCKING: | |
685 | * None. | |
686 | * | |
687 | * Read block address from @tf. This function can handle all | |
688 | * three address formats - LBA, LBA48 and CHS. tf->protocol and | |
689 | * flags select the address format to use. | |
690 | * | |
691 | * RETURNS: | |
692 | * Block address read from @tf. | |
693 | */ | |
694 | u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) | |
695 | { | |
696 | u64 block = 0; | |
697 | ||
698 | if (tf->flags & ATA_TFLAG_LBA) { | |
699 | if (tf->flags & ATA_TFLAG_LBA48) { | |
700 | block |= (u64)tf->hob_lbah << 40; | |
701 | block |= (u64)tf->hob_lbam << 32; | |
44901a96 | 702 | block |= (u64)tf->hob_lbal << 24; |
35b649fe TH |
703 | } else |
704 | block |= (tf->device & 0xf) << 24; | |
705 | ||
706 | block |= tf->lbah << 16; | |
707 | block |= tf->lbam << 8; | |
708 | block |= tf->lbal; | |
709 | } else { | |
710 | u32 cyl, head, sect; | |
711 | ||
712 | cyl = tf->lbam | (tf->lbah << 8); | |
713 | head = tf->device & 0xf; | |
714 | sect = tf->lbal; | |
715 | ||
ac8672ea | 716 | if (!sect) { |
a9a79dfe JP |
717 | ata_dev_warn(dev, |
718 | "device reported invalid CHS sector 0\n"); | |
ac8672ea TH |
719 | sect = 1; /* oh well */ |
720 | } | |
721 | ||
722 | block = (cyl * dev->heads + head) * dev->sectors + sect - 1; | |
35b649fe TH |
723 | } |
724 | ||
725 | return block; | |
726 | } | |
727 | ||
bd056d7e TH |
728 | /** |
729 | * ata_build_rw_tf - Build ATA taskfile for given read/write request | |
730 | * @tf: Target ATA taskfile | |
731 | * @dev: ATA device @tf belongs to | |
732 | * @block: Block address | |
733 | * @n_block: Number of blocks | |
734 | * @tf_flags: RW/FUA etc... | |
735 | * @tag: tag | |
736 | * | |
737 | * LOCKING: | |
738 | * None. | |
739 | * | |
740 | * Build ATA taskfile @tf for read/write request described by | |
741 | * @block, @n_block, @tf_flags and @tag on @dev. | |
742 | * | |
743 | * RETURNS: | |
744 | * | |
745 | * 0 on success, -ERANGE if the request is too large for @dev, | |
746 | * -EINVAL if the request is invalid. | |
747 | */ | |
748 | int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, | |
749 | u64 block, u32 n_block, unsigned int tf_flags, | |
750 | unsigned int tag) | |
751 | { | |
752 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
753 | tf->flags |= tf_flags; | |
754 | ||
6d1245bf | 755 | if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
bd056d7e TH |
756 | /* yay, NCQ */ |
757 | if (!lba_48_ok(block, n_block)) | |
758 | return -ERANGE; | |
759 | ||
760 | tf->protocol = ATA_PROT_NCQ; | |
761 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
762 | ||
763 | if (tf->flags & ATA_TFLAG_WRITE) | |
764 | tf->command = ATA_CMD_FPDMA_WRITE; | |
765 | else | |
766 | tf->command = ATA_CMD_FPDMA_READ; | |
767 | ||
768 | tf->nsect = tag << 3; | |
769 | tf->hob_feature = (n_block >> 8) & 0xff; | |
770 | tf->feature = n_block & 0xff; | |
771 | ||
772 | tf->hob_lbah = (block >> 40) & 0xff; | |
773 | tf->hob_lbam = (block >> 32) & 0xff; | |
774 | tf->hob_lbal = (block >> 24) & 0xff; | |
775 | tf->lbah = (block >> 16) & 0xff; | |
776 | tf->lbam = (block >> 8) & 0xff; | |
777 | tf->lbal = block & 0xff; | |
778 | ||
9ca7cfa4 | 779 | tf->device = ATA_LBA; |
bd056d7e TH |
780 | if (tf->flags & ATA_TFLAG_FUA) |
781 | tf->device |= 1 << 7; | |
782 | } else if (dev->flags & ATA_DFLAG_LBA) { | |
783 | tf->flags |= ATA_TFLAG_LBA; | |
784 | ||
785 | if (lba_28_ok(block, n_block)) { | |
786 | /* use LBA28 */ | |
787 | tf->device |= (block >> 24) & 0xf; | |
788 | } else if (lba_48_ok(block, n_block)) { | |
789 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
790 | return -ERANGE; | |
791 | ||
792 | /* use LBA48 */ | |
793 | tf->flags |= ATA_TFLAG_LBA48; | |
794 | ||
795 | tf->hob_nsect = (n_block >> 8) & 0xff; | |
796 | ||
797 | tf->hob_lbah = (block >> 40) & 0xff; | |
798 | tf->hob_lbam = (block >> 32) & 0xff; | |
799 | tf->hob_lbal = (block >> 24) & 0xff; | |
800 | } else | |
801 | /* request too large even for LBA48 */ | |
802 | return -ERANGE; | |
803 | ||
804 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
805 | return -EINVAL; | |
806 | ||
807 | tf->nsect = n_block & 0xff; | |
808 | ||
809 | tf->lbah = (block >> 16) & 0xff; | |
810 | tf->lbam = (block >> 8) & 0xff; | |
811 | tf->lbal = block & 0xff; | |
812 | ||
813 | tf->device |= ATA_LBA; | |
814 | } else { | |
815 | /* CHS */ | |
816 | u32 sect, head, cyl, track; | |
817 | ||
818 | /* The request -may- be too large for CHS addressing. */ | |
819 | if (!lba_28_ok(block, n_block)) | |
820 | return -ERANGE; | |
821 | ||
822 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
823 | return -EINVAL; | |
824 | ||
825 | /* Convert LBA to CHS */ | |
826 | track = (u32)block / dev->sectors; | |
827 | cyl = track / dev->heads; | |
828 | head = track % dev->heads; | |
829 | sect = (u32)block % dev->sectors + 1; | |
830 | ||
831 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", | |
832 | (u32)block, track, cyl, head, sect); | |
833 | ||
834 | /* Check whether the converted CHS can fit. | |
835 | Cylinder: 0-65535 | |
836 | Head: 0-15 | |
837 | Sector: 1-255*/ | |
838 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
839 | return -ERANGE; | |
840 | ||
841 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
842 | tf->lbal = sect; | |
843 | tf->lbam = cyl; | |
844 | tf->lbah = cyl >> 8; | |
845 | tf->device |= head; | |
846 | } | |
847 | ||
848 | return 0; | |
849 | } | |
850 | ||
cb95d562 TH |
851 | /** |
852 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
853 | * @pio_mask: pio_mask | |
854 | * @mwdma_mask: mwdma_mask | |
855 | * @udma_mask: udma_mask | |
856 | * | |
857 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
858 | * unsigned int xfer_mask. | |
859 | * | |
860 | * LOCKING: | |
861 | * None. | |
862 | * | |
863 | * RETURNS: | |
864 | * Packed xfer_mask. | |
865 | */ | |
7dc951ae TH |
866 | unsigned long ata_pack_xfermask(unsigned long pio_mask, |
867 | unsigned long mwdma_mask, | |
868 | unsigned long udma_mask) | |
cb95d562 TH |
869 | { |
870 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
871 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
872 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
873 | } | |
874 | ||
c0489e4e TH |
875 | /** |
876 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
877 | * @xfer_mask: xfer_mask to unpack | |
878 | * @pio_mask: resulting pio_mask | |
879 | * @mwdma_mask: resulting mwdma_mask | |
880 | * @udma_mask: resulting udma_mask | |
881 | * | |
882 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
883 | * Any NULL distination masks will be ignored. | |
884 | */ | |
7dc951ae TH |
885 | void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask, |
886 | unsigned long *mwdma_mask, unsigned long *udma_mask) | |
c0489e4e TH |
887 | { |
888 | if (pio_mask) | |
889 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
890 | if (mwdma_mask) | |
891 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
892 | if (udma_mask) | |
893 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
894 | } | |
895 | ||
cb95d562 | 896 | static const struct ata_xfer_ent { |
be9a50c8 | 897 | int shift, bits; |
cb95d562 TH |
898 | u8 base; |
899 | } ata_xfer_tbl[] = { | |
70cd071e TH |
900 | { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, |
901 | { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, | |
902 | { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, | |
cb95d562 TH |
903 | { -1, }, |
904 | }; | |
905 | ||
906 | /** | |
907 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
908 | * @xfer_mask: xfer_mask of interest | |
909 | * | |
910 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
911 | * bit of @xfer_mask is considered. | |
912 | * | |
913 | * LOCKING: | |
914 | * None. | |
915 | * | |
916 | * RETURNS: | |
70cd071e | 917 | * Matching XFER_* value, 0xff if no match found. |
cb95d562 | 918 | */ |
7dc951ae | 919 | u8 ata_xfer_mask2mode(unsigned long xfer_mask) |
cb95d562 TH |
920 | { |
921 | int highbit = fls(xfer_mask) - 1; | |
922 | const struct ata_xfer_ent *ent; | |
923 | ||
924 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
925 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
926 | return ent->base + highbit - ent->shift; | |
70cd071e | 927 | return 0xff; |
cb95d562 TH |
928 | } |
929 | ||
930 | /** | |
931 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
932 | * @xfer_mode: XFER_* of interest | |
933 | * | |
934 | * Return matching xfer_mask for @xfer_mode. | |
935 | * | |
936 | * LOCKING: | |
937 | * None. | |
938 | * | |
939 | * RETURNS: | |
940 | * Matching xfer_mask, 0 if no match found. | |
941 | */ | |
7dc951ae | 942 | unsigned long ata_xfer_mode2mask(u8 xfer_mode) |
cb95d562 TH |
943 | { |
944 | const struct ata_xfer_ent *ent; | |
945 | ||
946 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
947 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
70cd071e TH |
948 | return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) |
949 | & ~((1 << ent->shift) - 1); | |
cb95d562 TH |
950 | return 0; |
951 | } | |
952 | ||
953 | /** | |
954 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
955 | * @xfer_mode: XFER_* of interest | |
956 | * | |
957 | * Return matching xfer_shift for @xfer_mode. | |
958 | * | |
959 | * LOCKING: | |
960 | * None. | |
961 | * | |
962 | * RETURNS: | |
963 | * Matching xfer_shift, -1 if no match found. | |
964 | */ | |
7dc951ae | 965 | int ata_xfer_mode2shift(unsigned long xfer_mode) |
cb95d562 TH |
966 | { |
967 | const struct ata_xfer_ent *ent; | |
968 | ||
969 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
970 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
971 | return ent->shift; | |
972 | return -1; | |
973 | } | |
974 | ||
1da177e4 | 975 | /** |
1da7b0d0 TH |
976 | * ata_mode_string - convert xfer_mask to string |
977 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
1da177e4 LT |
978 | * |
979 | * Determine string which represents the highest speed | |
1da7b0d0 | 980 | * (highest bit in @modemask). |
1da177e4 LT |
981 | * |
982 | * LOCKING: | |
983 | * None. | |
984 | * | |
985 | * RETURNS: | |
986 | * Constant C string representing highest speed listed in | |
1da7b0d0 | 987 | * @mode_mask, or the constant C string "<n/a>". |
1da177e4 | 988 | */ |
7dc951ae | 989 | const char *ata_mode_string(unsigned long xfer_mask) |
1da177e4 | 990 | { |
75f554bc TH |
991 | static const char * const xfer_mode_str[] = { |
992 | "PIO0", | |
993 | "PIO1", | |
994 | "PIO2", | |
995 | "PIO3", | |
996 | "PIO4", | |
b352e57d AC |
997 | "PIO5", |
998 | "PIO6", | |
75f554bc TH |
999 | "MWDMA0", |
1000 | "MWDMA1", | |
1001 | "MWDMA2", | |
b352e57d AC |
1002 | "MWDMA3", |
1003 | "MWDMA4", | |
75f554bc TH |
1004 | "UDMA/16", |
1005 | "UDMA/25", | |
1006 | "UDMA/33", | |
1007 | "UDMA/44", | |
1008 | "UDMA/66", | |
1009 | "UDMA/100", | |
1010 | "UDMA/133", | |
1011 | "UDMA7", | |
1012 | }; | |
1da7b0d0 | 1013 | int highbit; |
1da177e4 | 1014 | |
1da7b0d0 TH |
1015 | highbit = fls(xfer_mask) - 1; |
1016 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
1017 | return xfer_mode_str[highbit]; | |
1da177e4 | 1018 | return "<n/a>"; |
1da177e4 LT |
1019 | } |
1020 | ||
d9027470 | 1021 | const char *sata_spd_string(unsigned int spd) |
4c360c81 TH |
1022 | { |
1023 | static const char * const spd_str[] = { | |
1024 | "1.5 Gbps", | |
1025 | "3.0 Gbps", | |
8522ee25 | 1026 | "6.0 Gbps", |
4c360c81 TH |
1027 | }; |
1028 | ||
1029 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) | |
1030 | return "<unknown>"; | |
1031 | return spd_str[spd - 1]; | |
1032 | } | |
1033 | ||
1da177e4 LT |
1034 | /** |
1035 | * ata_dev_classify - determine device type based on ATA-spec signature | |
1036 | * @tf: ATA taskfile register set for device to be identified | |
1037 | * | |
1038 | * Determine from taskfile register contents whether a device is | |
1039 | * ATA or ATAPI, as per "Signature and persistence" section | |
1040 | * of ATA/PI spec (volume 1, sect 5.14). | |
1041 | * | |
1042 | * LOCKING: | |
1043 | * None. | |
1044 | * | |
1045 | * RETURNS: | |
9162c657 HR |
1046 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP, |
1047 | * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure. | |
1da177e4 | 1048 | */ |
057ace5e | 1049 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
1050 | { |
1051 | /* Apple's open source Darwin code hints that some devices only | |
1052 | * put a proper signature into the LBA mid/high registers, | |
1053 | * So, we only check those. It's sufficient for uniqueness. | |
633273a3 TH |
1054 | * |
1055 | * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate | |
1056 | * signatures for ATA and ATAPI devices attached on SerialATA, | |
1057 | * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA | |
1058 | * spec has never mentioned about using different signatures | |
1059 | * for ATA/ATAPI devices. Then, Serial ATA II: Port | |
1060 | * Multiplier specification began to use 0x69/0x96 to identify | |
1061 | * port multpliers and 0x3c/0xc3 to identify SEMB device. | |
1062 | * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and | |
1063 | * 0x69/0x96 shortly and described them as reserved for | |
1064 | * SerialATA. | |
1065 | * | |
1066 | * We follow the current spec and consider that 0x69/0x96 | |
1067 | * identifies a port multiplier and 0x3c/0xc3 a SEMB device. | |
79b42bab TH |
1068 | * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports |
1069 | * SEMB signature. This is worked around in | |
1070 | * ata_dev_read_id(). | |
1da177e4 | 1071 | */ |
633273a3 | 1072 | if ((tf->lbam == 0) && (tf->lbah == 0)) { |
1da177e4 LT |
1073 | DPRINTK("found ATA device by sig\n"); |
1074 | return ATA_DEV_ATA; | |
1075 | } | |
1076 | ||
633273a3 | 1077 | if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { |
1da177e4 LT |
1078 | DPRINTK("found ATAPI device by sig\n"); |
1079 | return ATA_DEV_ATAPI; | |
1080 | } | |
1081 | ||
633273a3 TH |
1082 | if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { |
1083 | DPRINTK("found PMP device by sig\n"); | |
1084 | return ATA_DEV_PMP; | |
1085 | } | |
1086 | ||
1087 | if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { | |
79b42bab TH |
1088 | DPRINTK("found SEMB device by sig (could be ATA device)\n"); |
1089 | return ATA_DEV_SEMB; | |
633273a3 TH |
1090 | } |
1091 | ||
9162c657 HR |
1092 | if ((tf->lbam == 0xcd) && (tf->lbah == 0xab)) { |
1093 | DPRINTK("found ZAC device by sig\n"); | |
1094 | return ATA_DEV_ZAC; | |
1095 | } | |
1096 | ||
1da177e4 LT |
1097 | DPRINTK("unknown device\n"); |
1098 | return ATA_DEV_UNKNOWN; | |
1099 | } | |
1100 | ||
1da177e4 | 1101 | /** |
6a62a04d | 1102 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
1103 | * @id: IDENTIFY DEVICE results we will examine |
1104 | * @s: string into which data is output | |
1105 | * @ofs: offset into identify device page | |
1106 | * @len: length of string to return. must be an even number. | |
1107 | * | |
1108 | * The strings in the IDENTIFY DEVICE page are broken up into | |
1109 | * 16-bit chunks. Run through the string, and output each | |
1110 | * 8-bit chunk linearly, regardless of platform. | |
1111 | * | |
1112 | * LOCKING: | |
1113 | * caller. | |
1114 | */ | |
1115 | ||
6a62a04d TH |
1116 | void ata_id_string(const u16 *id, unsigned char *s, |
1117 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
1118 | { |
1119 | unsigned int c; | |
1120 | ||
963e4975 AC |
1121 | BUG_ON(len & 1); |
1122 | ||
1da177e4 LT |
1123 | while (len > 0) { |
1124 | c = id[ofs] >> 8; | |
1125 | *s = c; | |
1126 | s++; | |
1127 | ||
1128 | c = id[ofs] & 0xff; | |
1129 | *s = c; | |
1130 | s++; | |
1131 | ||
1132 | ofs++; | |
1133 | len -= 2; | |
1134 | } | |
1135 | } | |
1136 | ||
0e949ff3 | 1137 | /** |
6a62a04d | 1138 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
1139 | * @id: IDENTIFY DEVICE results we will examine |
1140 | * @s: string into which data is output | |
1141 | * @ofs: offset into identify device page | |
1142 | * @len: length of string to return. must be an odd number. | |
1143 | * | |
6a62a04d | 1144 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
1145 | * trims trailing spaces and terminates the resulting string with |
1146 | * null. @len must be actual maximum length (even number) + 1. | |
1147 | * | |
1148 | * LOCKING: | |
1149 | * caller. | |
1150 | */ | |
6a62a04d TH |
1151 | void ata_id_c_string(const u16 *id, unsigned char *s, |
1152 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
1153 | { |
1154 | unsigned char *p; | |
1155 | ||
6a62a04d | 1156 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
1157 | |
1158 | p = s + strnlen(s, len - 1); | |
1159 | while (p > s && p[-1] == ' ') | |
1160 | p--; | |
1161 | *p = '\0'; | |
1162 | } | |
0baab86b | 1163 | |
db6f8759 TH |
1164 | static u64 ata_id_n_sectors(const u16 *id) |
1165 | { | |
1166 | if (ata_id_has_lba(id)) { | |
1167 | if (ata_id_has_lba48(id)) | |
968e594a | 1168 | return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); |
db6f8759 | 1169 | else |
968e594a | 1170 | return ata_id_u32(id, ATA_ID_LBA_CAPACITY); |
db6f8759 TH |
1171 | } else { |
1172 | if (ata_id_current_chs_valid(id)) | |
968e594a RH |
1173 | return id[ATA_ID_CUR_CYLS] * id[ATA_ID_CUR_HEADS] * |
1174 | id[ATA_ID_CUR_SECTORS]; | |
db6f8759 | 1175 | else |
968e594a RH |
1176 | return id[ATA_ID_CYLS] * id[ATA_ID_HEADS] * |
1177 | id[ATA_ID_SECTORS]; | |
db6f8759 TH |
1178 | } |
1179 | } | |
1180 | ||
a5987e0a | 1181 | u64 ata_tf_to_lba48(const struct ata_taskfile *tf) |
1e999736 AC |
1182 | { |
1183 | u64 sectors = 0; | |
1184 | ||
1185 | sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; | |
1186 | sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; | |
ba14a9c2 | 1187 | sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24; |
1e999736 AC |
1188 | sectors |= (tf->lbah & 0xff) << 16; |
1189 | sectors |= (tf->lbam & 0xff) << 8; | |
1190 | sectors |= (tf->lbal & 0xff); | |
1191 | ||
a5987e0a | 1192 | return sectors; |
1e999736 AC |
1193 | } |
1194 | ||
a5987e0a | 1195 | u64 ata_tf_to_lba(const struct ata_taskfile *tf) |
1e999736 AC |
1196 | { |
1197 | u64 sectors = 0; | |
1198 | ||
1199 | sectors |= (tf->device & 0x0f) << 24; | |
1200 | sectors |= (tf->lbah & 0xff) << 16; | |
1201 | sectors |= (tf->lbam & 0xff) << 8; | |
1202 | sectors |= (tf->lbal & 0xff); | |
1203 | ||
a5987e0a | 1204 | return sectors; |
1e999736 AC |
1205 | } |
1206 | ||
1207 | /** | |
c728a914 TH |
1208 | * ata_read_native_max_address - Read native max address |
1209 | * @dev: target device | |
1210 | * @max_sectors: out parameter for the result native max address | |
1e999736 | 1211 | * |
c728a914 TH |
1212 | * Perform an LBA48 or LBA28 native size query upon the device in |
1213 | * question. | |
1e999736 | 1214 | * |
c728a914 TH |
1215 | * RETURNS: |
1216 | * 0 on success, -EACCES if command is aborted by the drive. | |
1217 | * -EIO on other errors. | |
1e999736 | 1218 | */ |
c728a914 | 1219 | static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) |
1e999736 | 1220 | { |
c728a914 | 1221 | unsigned int err_mask; |
1e999736 | 1222 | struct ata_taskfile tf; |
c728a914 | 1223 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
1224 | |
1225 | ata_tf_init(dev, &tf); | |
1226 | ||
c728a914 | 1227 | /* always clear all address registers */ |
1e999736 | 1228 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1e999736 | 1229 | |
c728a914 TH |
1230 | if (lba48) { |
1231 | tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; | |
1232 | tf.flags |= ATA_TFLAG_LBA48; | |
1233 | } else | |
1234 | tf.command = ATA_CMD_READ_NATIVE_MAX; | |
1e999736 | 1235 | |
1e999736 | 1236 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 TH |
1237 | tf.device |= ATA_LBA; |
1238 | ||
2b789108 | 1239 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
c728a914 | 1240 | if (err_mask) { |
a9a79dfe JP |
1241 | ata_dev_warn(dev, |
1242 | "failed to read native max address (err_mask=0x%x)\n", | |
1243 | err_mask); | |
c728a914 TH |
1244 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) |
1245 | return -EACCES; | |
1246 | return -EIO; | |
1247 | } | |
1e999736 | 1248 | |
c728a914 | 1249 | if (lba48) |
a5987e0a | 1250 | *max_sectors = ata_tf_to_lba48(&tf) + 1; |
c728a914 | 1251 | else |
a5987e0a | 1252 | *max_sectors = ata_tf_to_lba(&tf) + 1; |
2dcb407e | 1253 | if (dev->horkage & ATA_HORKAGE_HPA_SIZE) |
93328e11 | 1254 | (*max_sectors)--; |
c728a914 | 1255 | return 0; |
1e999736 AC |
1256 | } |
1257 | ||
1258 | /** | |
c728a914 TH |
1259 | * ata_set_max_sectors - Set max sectors |
1260 | * @dev: target device | |
6b38d1d1 | 1261 | * @new_sectors: new max sectors value to set for the device |
1e999736 | 1262 | * |
c728a914 TH |
1263 | * Set max sectors of @dev to @new_sectors. |
1264 | * | |
1265 | * RETURNS: | |
1266 | * 0 on success, -EACCES if command is aborted or denied (due to | |
1267 | * previous non-volatile SET_MAX) by the drive. -EIO on other | |
1268 | * errors. | |
1e999736 | 1269 | */ |
05027adc | 1270 | static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) |
1e999736 | 1271 | { |
c728a914 | 1272 | unsigned int err_mask; |
1e999736 | 1273 | struct ata_taskfile tf; |
c728a914 | 1274 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
1275 | |
1276 | new_sectors--; | |
1277 | ||
1278 | ata_tf_init(dev, &tf); | |
1279 | ||
1e999736 | 1280 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
c728a914 TH |
1281 | |
1282 | if (lba48) { | |
1283 | tf.command = ATA_CMD_SET_MAX_EXT; | |
1284 | tf.flags |= ATA_TFLAG_LBA48; | |
1285 | ||
1286 | tf.hob_lbal = (new_sectors >> 24) & 0xff; | |
1287 | tf.hob_lbam = (new_sectors >> 32) & 0xff; | |
1288 | tf.hob_lbah = (new_sectors >> 40) & 0xff; | |
1e582ba4 | 1289 | } else { |
c728a914 TH |
1290 | tf.command = ATA_CMD_SET_MAX; |
1291 | ||
1e582ba4 TH |
1292 | tf.device |= (new_sectors >> 24) & 0xf; |
1293 | } | |
1294 | ||
1e999736 | 1295 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 | 1296 | tf.device |= ATA_LBA; |
1e999736 AC |
1297 | |
1298 | tf.lbal = (new_sectors >> 0) & 0xff; | |
1299 | tf.lbam = (new_sectors >> 8) & 0xff; | |
1300 | tf.lbah = (new_sectors >> 16) & 0xff; | |
1e999736 | 1301 | |
2b789108 | 1302 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
c728a914 | 1303 | if (err_mask) { |
a9a79dfe JP |
1304 | ata_dev_warn(dev, |
1305 | "failed to set max address (err_mask=0x%x)\n", | |
1306 | err_mask); | |
c728a914 TH |
1307 | if (err_mask == AC_ERR_DEV && |
1308 | (tf.feature & (ATA_ABORTED | ATA_IDNF))) | |
1309 | return -EACCES; | |
1310 | return -EIO; | |
1311 | } | |
1312 | ||
c728a914 | 1313 | return 0; |
1e999736 AC |
1314 | } |
1315 | ||
1316 | /** | |
1317 | * ata_hpa_resize - Resize a device with an HPA set | |
1318 | * @dev: Device to resize | |
1319 | * | |
1320 | * Read the size of an LBA28 or LBA48 disk with HPA features and resize | |
1321 | * it if required to the full size of the media. The caller must check | |
1322 | * the drive has the HPA feature set enabled. | |
05027adc TH |
1323 | * |
1324 | * RETURNS: | |
1325 | * 0 on success, -errno on failure. | |
1e999736 | 1326 | */ |
05027adc | 1327 | static int ata_hpa_resize(struct ata_device *dev) |
1e999736 | 1328 | { |
05027adc TH |
1329 | struct ata_eh_context *ehc = &dev->link->eh_context; |
1330 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; | |
445d211b | 1331 | bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA; |
05027adc TH |
1332 | u64 sectors = ata_id_n_sectors(dev->id); |
1333 | u64 native_sectors; | |
c728a914 | 1334 | int rc; |
a617c09f | 1335 | |
05027adc | 1336 | /* do we need to do it? */ |
9162c657 | 1337 | if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) || |
05027adc TH |
1338 | !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || |
1339 | (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) | |
c728a914 | 1340 | return 0; |
1e999736 | 1341 | |
05027adc TH |
1342 | /* read native max address */ |
1343 | rc = ata_read_native_max_address(dev, &native_sectors); | |
1344 | if (rc) { | |
dda7aba1 TH |
1345 | /* If device aborted the command or HPA isn't going to |
1346 | * be unlocked, skip HPA resizing. | |
05027adc | 1347 | */ |
445d211b | 1348 | if (rc == -EACCES || !unlock_hpa) { |
a9a79dfe JP |
1349 | ata_dev_warn(dev, |
1350 | "HPA support seems broken, skipping HPA handling\n"); | |
05027adc TH |
1351 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; |
1352 | ||
1353 | /* we can continue if device aborted the command */ | |
1354 | if (rc == -EACCES) | |
1355 | rc = 0; | |
1e999736 | 1356 | } |
37301a55 | 1357 | |
05027adc TH |
1358 | return rc; |
1359 | } | |
5920dadf | 1360 | dev->n_native_sectors = native_sectors; |
05027adc TH |
1361 | |
1362 | /* nothing to do? */ | |
445d211b | 1363 | if (native_sectors <= sectors || !unlock_hpa) { |
05027adc TH |
1364 | if (!print_info || native_sectors == sectors) |
1365 | return 0; | |
1366 | ||
1367 | if (native_sectors > sectors) | |
a9a79dfe | 1368 | ata_dev_info(dev, |
05027adc TH |
1369 | "HPA detected: current %llu, native %llu\n", |
1370 | (unsigned long long)sectors, | |
1371 | (unsigned long long)native_sectors); | |
1372 | else if (native_sectors < sectors) | |
a9a79dfe JP |
1373 | ata_dev_warn(dev, |
1374 | "native sectors (%llu) is smaller than sectors (%llu)\n", | |
05027adc TH |
1375 | (unsigned long long)native_sectors, |
1376 | (unsigned long long)sectors); | |
1377 | return 0; | |
1378 | } | |
1379 | ||
1380 | /* let's unlock HPA */ | |
1381 | rc = ata_set_max_sectors(dev, native_sectors); | |
1382 | if (rc == -EACCES) { | |
1383 | /* if device aborted the command, skip HPA resizing */ | |
a9a79dfe JP |
1384 | ata_dev_warn(dev, |
1385 | "device aborted resize (%llu -> %llu), skipping HPA handling\n", | |
1386 | (unsigned long long)sectors, | |
1387 | (unsigned long long)native_sectors); | |
05027adc TH |
1388 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; |
1389 | return 0; | |
1390 | } else if (rc) | |
1391 | return rc; | |
1392 | ||
1393 | /* re-read IDENTIFY data */ | |
1394 | rc = ata_dev_reread_id(dev, 0); | |
1395 | if (rc) { | |
a9a79dfe JP |
1396 | ata_dev_err(dev, |
1397 | "failed to re-read IDENTIFY data after HPA resizing\n"); | |
05027adc TH |
1398 | return rc; |
1399 | } | |
1400 | ||
1401 | if (print_info) { | |
1402 | u64 new_sectors = ata_id_n_sectors(dev->id); | |
a9a79dfe | 1403 | ata_dev_info(dev, |
05027adc TH |
1404 | "HPA unlocked: %llu -> %llu, native %llu\n", |
1405 | (unsigned long long)sectors, | |
1406 | (unsigned long long)new_sectors, | |
1407 | (unsigned long long)native_sectors); | |
1408 | } | |
1409 | ||
1410 | return 0; | |
1e999736 AC |
1411 | } |
1412 | ||
1da177e4 LT |
1413 | /** |
1414 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 1415 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 1416 | * |
0bd3300a TH |
1417 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
1418 | * page. | |
1da177e4 LT |
1419 | * |
1420 | * LOCKING: | |
1421 | * caller. | |
1422 | */ | |
1423 | ||
0bd3300a | 1424 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
1425 | { |
1426 | DPRINTK("49==0x%04x " | |
1427 | "53==0x%04x " | |
1428 | "63==0x%04x " | |
1429 | "64==0x%04x " | |
1430 | "75==0x%04x \n", | |
0bd3300a TH |
1431 | id[49], |
1432 | id[53], | |
1433 | id[63], | |
1434 | id[64], | |
1435 | id[75]); | |
1da177e4 LT |
1436 | DPRINTK("80==0x%04x " |
1437 | "81==0x%04x " | |
1438 | "82==0x%04x " | |
1439 | "83==0x%04x " | |
1440 | "84==0x%04x \n", | |
0bd3300a TH |
1441 | id[80], |
1442 | id[81], | |
1443 | id[82], | |
1444 | id[83], | |
1445 | id[84]); | |
1da177e4 LT |
1446 | DPRINTK("88==0x%04x " |
1447 | "93==0x%04x\n", | |
0bd3300a TH |
1448 | id[88], |
1449 | id[93]); | |
1da177e4 LT |
1450 | } |
1451 | ||
cb95d562 TH |
1452 | /** |
1453 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
1454 | * @id: IDENTIFY data to compute xfer mask from | |
1455 | * | |
1456 | * Compute the xfermask for this device. This is not as trivial | |
1457 | * as it seems if we must consider early devices correctly. | |
1458 | * | |
1459 | * FIXME: pre IDE drive timing (do we care ?). | |
1460 | * | |
1461 | * LOCKING: | |
1462 | * None. | |
1463 | * | |
1464 | * RETURNS: | |
1465 | * Computed xfermask | |
1466 | */ | |
7dc951ae | 1467 | unsigned long ata_id_xfermask(const u16 *id) |
cb95d562 | 1468 | { |
7dc951ae | 1469 | unsigned long pio_mask, mwdma_mask, udma_mask; |
cb95d562 TH |
1470 | |
1471 | /* Usual case. Word 53 indicates word 64 is valid */ | |
1472 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
1473 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
1474 | pio_mask <<= 3; | |
1475 | pio_mask |= 0x7; | |
1476 | } else { | |
1477 | /* If word 64 isn't valid then Word 51 high byte holds | |
1478 | * the PIO timing number for the maximum. Turn it into | |
1479 | * a mask. | |
1480 | */ | |
7a0f1c8a | 1481 | u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
46767aeb | 1482 | if (mode < 5) /* Valid PIO range */ |
2dcb407e | 1483 | pio_mask = (2 << mode) - 1; |
46767aeb AC |
1484 | else |
1485 | pio_mask = 1; | |
cb95d562 TH |
1486 | |
1487 | /* But wait.. there's more. Design your standards by | |
1488 | * committee and you too can get a free iordy field to | |
1489 | * process. However its the speeds not the modes that | |
1490 | * are supported... Note drivers using the timing API | |
1491 | * will get this right anyway | |
1492 | */ | |
1493 | } | |
1494 | ||
1495 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
fb21f0d0 | 1496 | |
b352e57d AC |
1497 | if (ata_id_is_cfa(id)) { |
1498 | /* | |
1499 | * Process compact flash extended modes | |
1500 | */ | |
62afe5d7 SS |
1501 | int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7; |
1502 | int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7; | |
b352e57d AC |
1503 | |
1504 | if (pio) | |
1505 | pio_mask |= (1 << 5); | |
1506 | if (pio > 1) | |
1507 | pio_mask |= (1 << 6); | |
1508 | if (dma) | |
1509 | mwdma_mask |= (1 << 3); | |
1510 | if (dma > 1) | |
1511 | mwdma_mask |= (1 << 4); | |
1512 | } | |
1513 | ||
fb21f0d0 TH |
1514 | udma_mask = 0; |
1515 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
1516 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
cb95d562 TH |
1517 | |
1518 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
1519 | } | |
1520 | ||
7102d230 | 1521 | static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 1522 | { |
77853bf2 | 1523 | struct completion *waiting = qc->private_data; |
a2a7a662 | 1524 | |
a2a7a662 | 1525 | complete(waiting); |
a2a7a662 TH |
1526 | } |
1527 | ||
1528 | /** | |
2432697b | 1529 | * ata_exec_internal_sg - execute libata internal command |
a2a7a662 TH |
1530 | * @dev: Device to which the command is sent |
1531 | * @tf: Taskfile registers for the command and the result | |
d69cf37d | 1532 | * @cdb: CDB for packet command |
e227867f | 1533 | * @dma_dir: Data transfer direction of the command |
5c1ad8b3 | 1534 | * @sgl: sg list for the data buffer of the command |
2432697b | 1535 | * @n_elem: Number of sg entries |
2b789108 | 1536 | * @timeout: Timeout in msecs (0 for default) |
a2a7a662 TH |
1537 | * |
1538 | * Executes libata internal command with timeout. @tf contains | |
1539 | * command on entry and result on return. Timeout and error | |
1540 | * conditions are reported via return value. No recovery action | |
1541 | * is taken after a command times out. It's caller's duty to | |
1542 | * clean up after timeout. | |
1543 | * | |
1544 | * LOCKING: | |
1545 | * None. Should be called with kernel context, might sleep. | |
551e8889 TH |
1546 | * |
1547 | * RETURNS: | |
1548 | * Zero on success, AC_ERR_* mask on failure | |
a2a7a662 | 1549 | */ |
2432697b TH |
1550 | unsigned ata_exec_internal_sg(struct ata_device *dev, |
1551 | struct ata_taskfile *tf, const u8 *cdb, | |
87260216 | 1552 | int dma_dir, struct scatterlist *sgl, |
2b789108 | 1553 | unsigned int n_elem, unsigned long timeout) |
a2a7a662 | 1554 | { |
9af5c9c9 TH |
1555 | struct ata_link *link = dev->link; |
1556 | struct ata_port *ap = link->ap; | |
a2a7a662 | 1557 | u8 command = tf->command; |
87fbc5a0 | 1558 | int auto_timeout = 0; |
a2a7a662 | 1559 | struct ata_queued_cmd *qc; |
2ab7db1f | 1560 | unsigned int tag, preempted_tag; |
dedaf2b0 | 1561 | u32 preempted_sactive, preempted_qc_active; |
da917d69 | 1562 | int preempted_nr_active_links; |
60be6b9a | 1563 | DECLARE_COMPLETION_ONSTACK(wait); |
a2a7a662 | 1564 | unsigned long flags; |
77853bf2 | 1565 | unsigned int err_mask; |
d95a717f | 1566 | int rc; |
a2a7a662 | 1567 | |
ba6a1308 | 1568 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 | 1569 | |
e3180499 | 1570 | /* no internal command while frozen */ |
b51e9e5d | 1571 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
ba6a1308 | 1572 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1573 | return AC_ERR_SYSTEM; |
1574 | } | |
1575 | ||
2ab7db1f | 1576 | /* initialize internal qc */ |
a2a7a662 | 1577 | |
2ab7db1f TH |
1578 | /* XXX: Tag 0 is used for drivers with legacy EH as some |
1579 | * drivers choke if any other tag is given. This breaks | |
1580 | * ata_tag_internal() test for those drivers. Don't use new | |
1581 | * EH stuff without converting to it. | |
1582 | */ | |
1583 | if (ap->ops->error_handler) | |
1584 | tag = ATA_TAG_INTERNAL; | |
1585 | else | |
1586 | tag = 0; | |
1587 | ||
f69499f4 | 1588 | qc = __ata_qc_from_tag(ap, tag); |
2ab7db1f TH |
1589 | |
1590 | qc->tag = tag; | |
1591 | qc->scsicmd = NULL; | |
1592 | qc->ap = ap; | |
1593 | qc->dev = dev; | |
1594 | ata_qc_reinit(qc); | |
1595 | ||
9af5c9c9 TH |
1596 | preempted_tag = link->active_tag; |
1597 | preempted_sactive = link->sactive; | |
dedaf2b0 | 1598 | preempted_qc_active = ap->qc_active; |
da917d69 | 1599 | preempted_nr_active_links = ap->nr_active_links; |
9af5c9c9 TH |
1600 | link->active_tag = ATA_TAG_POISON; |
1601 | link->sactive = 0; | |
dedaf2b0 | 1602 | ap->qc_active = 0; |
da917d69 | 1603 | ap->nr_active_links = 0; |
2ab7db1f TH |
1604 | |
1605 | /* prepare & issue qc */ | |
a2a7a662 | 1606 | qc->tf = *tf; |
d69cf37d TH |
1607 | if (cdb) |
1608 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); | |
e771451c VP |
1609 | |
1610 | /* some SATA bridges need us to indicate data xfer direction */ | |
1611 | if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) && | |
1612 | dma_dir == DMA_FROM_DEVICE) | |
1613 | qc->tf.feature |= ATAPI_DMADIR; | |
1614 | ||
e61e0672 | 1615 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
a2a7a662 TH |
1616 | qc->dma_dir = dma_dir; |
1617 | if (dma_dir != DMA_NONE) { | |
2432697b | 1618 | unsigned int i, buflen = 0; |
87260216 | 1619 | struct scatterlist *sg; |
2432697b | 1620 | |
87260216 JA |
1621 | for_each_sg(sgl, sg, n_elem, i) |
1622 | buflen += sg->length; | |
2432697b | 1623 | |
87260216 | 1624 | ata_sg_init(qc, sgl, n_elem); |
49c80429 | 1625 | qc->nbytes = buflen; |
a2a7a662 TH |
1626 | } |
1627 | ||
77853bf2 | 1628 | qc->private_data = &wait; |
a2a7a662 TH |
1629 | qc->complete_fn = ata_qc_complete_internal; |
1630 | ||
8e0e694a | 1631 | ata_qc_issue(qc); |
a2a7a662 | 1632 | |
ba6a1308 | 1633 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 | 1634 | |
87fbc5a0 TH |
1635 | if (!timeout) { |
1636 | if (ata_probe_timeout) | |
1637 | timeout = ata_probe_timeout * 1000; | |
1638 | else { | |
1639 | timeout = ata_internal_cmd_timeout(dev, command); | |
1640 | auto_timeout = 1; | |
1641 | } | |
1642 | } | |
2b789108 | 1643 | |
c0c362b6 TH |
1644 | if (ap->ops->error_handler) |
1645 | ata_eh_release(ap); | |
1646 | ||
2b789108 | 1647 | rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); |
d95a717f | 1648 | |
c0c362b6 TH |
1649 | if (ap->ops->error_handler) |
1650 | ata_eh_acquire(ap); | |
1651 | ||
c429137a | 1652 | ata_sff_flush_pio_task(ap); |
41ade50c | 1653 | |
d95a717f | 1654 | if (!rc) { |
ba6a1308 | 1655 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 TH |
1656 | |
1657 | /* We're racing with irq here. If we lose, the | |
1658 | * following test prevents us from completing the qc | |
d95a717f TH |
1659 | * twice. If we win, the port is frozen and will be |
1660 | * cleaned up by ->post_internal_cmd(). | |
a2a7a662 | 1661 | */ |
77853bf2 | 1662 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
d95a717f TH |
1663 | qc->err_mask |= AC_ERR_TIMEOUT; |
1664 | ||
1665 | if (ap->ops->error_handler) | |
1666 | ata_port_freeze(ap); | |
1667 | else | |
1668 | ata_qc_complete(qc); | |
f15a1daf | 1669 | |
0dd4b21f | 1670 | if (ata_msg_warn(ap)) |
a9a79dfe JP |
1671 | ata_dev_warn(dev, "qc timeout (cmd 0x%x)\n", |
1672 | command); | |
a2a7a662 TH |
1673 | } |
1674 | ||
ba6a1308 | 1675 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 TH |
1676 | } |
1677 | ||
d95a717f TH |
1678 | /* do post_internal_cmd */ |
1679 | if (ap->ops->post_internal_cmd) | |
1680 | ap->ops->post_internal_cmd(qc); | |
1681 | ||
a51d644a TH |
1682 | /* perform minimal error analysis */ |
1683 | if (qc->flags & ATA_QCFLAG_FAILED) { | |
1684 | if (qc->result_tf.command & (ATA_ERR | ATA_DF)) | |
1685 | qc->err_mask |= AC_ERR_DEV; | |
1686 | ||
1687 | if (!qc->err_mask) | |
1688 | qc->err_mask |= AC_ERR_OTHER; | |
1689 | ||
1690 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1691 | qc->err_mask &= ~AC_ERR_OTHER; | |
d95a717f TH |
1692 | } |
1693 | ||
15869303 | 1694 | /* finish up */ |
ba6a1308 | 1695 | spin_lock_irqsave(ap->lock, flags); |
15869303 | 1696 | |
e61e0672 | 1697 | *tf = qc->result_tf; |
77853bf2 TH |
1698 | err_mask = qc->err_mask; |
1699 | ||
1700 | ata_qc_free(qc); | |
9af5c9c9 TH |
1701 | link->active_tag = preempted_tag; |
1702 | link->sactive = preempted_sactive; | |
dedaf2b0 | 1703 | ap->qc_active = preempted_qc_active; |
da917d69 | 1704 | ap->nr_active_links = preempted_nr_active_links; |
77853bf2 | 1705 | |
ba6a1308 | 1706 | spin_unlock_irqrestore(ap->lock, flags); |
15869303 | 1707 | |
87fbc5a0 TH |
1708 | if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout) |
1709 | ata_internal_cmd_timed_out(dev, command); | |
1710 | ||
77853bf2 | 1711 | return err_mask; |
a2a7a662 TH |
1712 | } |
1713 | ||
2432697b | 1714 | /** |
33480a0e | 1715 | * ata_exec_internal - execute libata internal command |
2432697b TH |
1716 | * @dev: Device to which the command is sent |
1717 | * @tf: Taskfile registers for the command and the result | |
1718 | * @cdb: CDB for packet command | |
e227867f | 1719 | * @dma_dir: Data transfer direction of the command |
2432697b TH |
1720 | * @buf: Data buffer of the command |
1721 | * @buflen: Length of data buffer | |
2b789108 | 1722 | * @timeout: Timeout in msecs (0 for default) |
2432697b TH |
1723 | * |
1724 | * Wrapper around ata_exec_internal_sg() which takes simple | |
1725 | * buffer instead of sg list. | |
1726 | * | |
1727 | * LOCKING: | |
1728 | * None. Should be called with kernel context, might sleep. | |
1729 | * | |
1730 | * RETURNS: | |
1731 | * Zero on success, AC_ERR_* mask on failure | |
1732 | */ | |
1733 | unsigned ata_exec_internal(struct ata_device *dev, | |
1734 | struct ata_taskfile *tf, const u8 *cdb, | |
2b789108 TH |
1735 | int dma_dir, void *buf, unsigned int buflen, |
1736 | unsigned long timeout) | |
2432697b | 1737 | { |
33480a0e TH |
1738 | struct scatterlist *psg = NULL, sg; |
1739 | unsigned int n_elem = 0; | |
2432697b | 1740 | |
33480a0e TH |
1741 | if (dma_dir != DMA_NONE) { |
1742 | WARN_ON(!buf); | |
1743 | sg_init_one(&sg, buf, buflen); | |
1744 | psg = &sg; | |
1745 | n_elem++; | |
1746 | } | |
2432697b | 1747 | |
2b789108 TH |
1748 | return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, |
1749 | timeout); | |
2432697b TH |
1750 | } |
1751 | ||
1bc4ccff AC |
1752 | /** |
1753 | * ata_pio_need_iordy - check if iordy needed | |
1754 | * @adev: ATA device | |
1755 | * | |
1756 | * Check if the current speed of the device requires IORDY. Used | |
1757 | * by various controllers for chip configuration. | |
1758 | */ | |
1bc4ccff AC |
1759 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
1760 | { | |
0d9e6659 TH |
1761 | /* Don't set IORDY if we're preparing for reset. IORDY may |
1762 | * lead to controller lock up on certain controllers if the | |
1763 | * port is not occupied. See bko#11703 for details. | |
1764 | */ | |
1765 | if (adev->link->ap->pflags & ATA_PFLAG_RESETTING) | |
1766 | return 0; | |
1767 | /* Controller doesn't support IORDY. Probably a pointless | |
1768 | * check as the caller should know this. | |
1769 | */ | |
9af5c9c9 | 1770 | if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) |
1bc4ccff | 1771 | return 0; |
5c18c4d2 DD |
1772 | /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */ |
1773 | if (ata_id_is_cfa(adev->id) | |
1774 | && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6)) | |
1775 | return 0; | |
432729f0 AC |
1776 | /* PIO3 and higher it is mandatory */ |
1777 | if (adev->pio_mode > XFER_PIO_2) | |
1778 | return 1; | |
1779 | /* We turn it on when possible */ | |
1780 | if (ata_id_has_iordy(adev->id)) | |
1bc4ccff | 1781 | return 1; |
432729f0 AC |
1782 | return 0; |
1783 | } | |
2e9edbf8 | 1784 | |
432729f0 AC |
1785 | /** |
1786 | * ata_pio_mask_no_iordy - Return the non IORDY mask | |
1787 | * @adev: ATA device | |
1788 | * | |
1789 | * Compute the highest mode possible if we are not using iordy. Return | |
1790 | * -1 if no iordy mode is available. | |
1791 | */ | |
432729f0 AC |
1792 | static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) |
1793 | { | |
1bc4ccff | 1794 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
1bc4ccff | 1795 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
432729f0 | 1796 | u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
1bc4ccff AC |
1797 | /* Is the speed faster than the drive allows non IORDY ? */ |
1798 | if (pio) { | |
1799 | /* This is cycle times not frequency - watch the logic! */ | |
1800 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
432729f0 AC |
1801 | return 3 << ATA_SHIFT_PIO; |
1802 | return 7 << ATA_SHIFT_PIO; | |
1bc4ccff AC |
1803 | } |
1804 | } | |
432729f0 | 1805 | return 3 << ATA_SHIFT_PIO; |
1bc4ccff AC |
1806 | } |
1807 | ||
963e4975 AC |
1808 | /** |
1809 | * ata_do_dev_read_id - default ID read method | |
1810 | * @dev: device | |
1811 | * @tf: proposed taskfile | |
1812 | * @id: data buffer | |
1813 | * | |
1814 | * Issue the identify taskfile and hand back the buffer containing | |
1815 | * identify data. For some RAID controllers and for pre ATA devices | |
1816 | * this function is wrapped or replaced by the driver | |
1817 | */ | |
1818 | unsigned int ata_do_dev_read_id(struct ata_device *dev, | |
1819 | struct ata_taskfile *tf, u16 *id) | |
1820 | { | |
1821 | return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE, | |
1822 | id, sizeof(id[0]) * ATA_ID_WORDS, 0); | |
1823 | } | |
1824 | ||
1da177e4 | 1825 | /** |
49016aca | 1826 | * ata_dev_read_id - Read ID data from the specified device |
49016aca TH |
1827 | * @dev: target device |
1828 | * @p_class: pointer to class of the target device (may be changed) | |
bff04647 | 1829 | * @flags: ATA_READID_* flags |
fe635c7e | 1830 | * @id: buffer to read IDENTIFY data into |
1da177e4 | 1831 | * |
49016aca TH |
1832 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
1833 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
aec5c3c1 TH |
1834 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
1835 | * for pre-ATA4 drives. | |
1da177e4 | 1836 | * |
50a99018 | 1837 | * FIXME: ATA_CMD_ID_ATA is optional for early drives and right |
2dcb407e | 1838 | * now we abort if we hit that case. |
50a99018 | 1839 | * |
1da177e4 | 1840 | * LOCKING: |
49016aca TH |
1841 | * Kernel thread context (may sleep) |
1842 | * | |
1843 | * RETURNS: | |
1844 | * 0 on success, -errno otherwise. | |
1da177e4 | 1845 | */ |
a9beec95 | 1846 | int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, |
bff04647 | 1847 | unsigned int flags, u16 *id) |
1da177e4 | 1848 | { |
9af5c9c9 | 1849 | struct ata_port *ap = dev->link->ap; |
49016aca | 1850 | unsigned int class = *p_class; |
a0123703 | 1851 | struct ata_taskfile tf; |
49016aca TH |
1852 | unsigned int err_mask = 0; |
1853 | const char *reason; | |
79b42bab | 1854 | bool is_semb = class == ATA_DEV_SEMB; |
54936f8b | 1855 | int may_fallback = 1, tried_spinup = 0; |
49016aca | 1856 | int rc; |
1da177e4 | 1857 | |
0dd4b21f | 1858 | if (ata_msg_ctl(ap)) |
a9a79dfe | 1859 | ata_dev_dbg(dev, "%s: ENTER\n", __func__); |
1da177e4 | 1860 | |
963e4975 | 1861 | retry: |
3373efd8 | 1862 | ata_tf_init(dev, &tf); |
a0123703 | 1863 | |
49016aca | 1864 | switch (class) { |
79b42bab TH |
1865 | case ATA_DEV_SEMB: |
1866 | class = ATA_DEV_ATA; /* some hard drives report SEMB sig */ | |
49016aca | 1867 | case ATA_DEV_ATA: |
9162c657 | 1868 | case ATA_DEV_ZAC: |
a0123703 | 1869 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
1870 | break; |
1871 | case ATA_DEV_ATAPI: | |
a0123703 | 1872 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
1873 | break; |
1874 | default: | |
1875 | rc = -ENODEV; | |
1876 | reason = "unsupported class"; | |
1877 | goto err_out; | |
1da177e4 LT |
1878 | } |
1879 | ||
a0123703 | 1880 | tf.protocol = ATA_PROT_PIO; |
81afe893 TH |
1881 | |
1882 | /* Some devices choke if TF registers contain garbage. Make | |
1883 | * sure those are properly initialized. | |
1884 | */ | |
1885 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1886 | ||
1887 | /* Device presence detection is unreliable on some | |
1888 | * controllers. Always poll IDENTIFY if available. | |
1889 | */ | |
1890 | tf.flags |= ATA_TFLAG_POLLING; | |
1da177e4 | 1891 | |
963e4975 AC |
1892 | if (ap->ops->read_id) |
1893 | err_mask = ap->ops->read_id(dev, &tf, id); | |
1894 | else | |
1895 | err_mask = ata_do_dev_read_id(dev, &tf, id); | |
1896 | ||
a0123703 | 1897 | if (err_mask) { |
800b3996 | 1898 | if (err_mask & AC_ERR_NODEV_HINT) { |
a9a79dfe | 1899 | ata_dev_dbg(dev, "NODEV after polling detection\n"); |
55a8e2c8 TH |
1900 | return -ENOENT; |
1901 | } | |
1902 | ||
79b42bab | 1903 | if (is_semb) { |
a9a79dfe JP |
1904 | ata_dev_info(dev, |
1905 | "IDENTIFY failed on device w/ SEMB sig, disabled\n"); | |
79b42bab TH |
1906 | /* SEMB is not supported yet */ |
1907 | *p_class = ATA_DEV_SEMB_UNSUP; | |
1908 | return 0; | |
1909 | } | |
1910 | ||
1ffc151f TH |
1911 | if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { |
1912 | /* Device or controller might have reported | |
1913 | * the wrong device class. Give a shot at the | |
1914 | * other IDENTIFY if the current one is | |
1915 | * aborted by the device. | |
1916 | */ | |
1917 | if (may_fallback) { | |
1918 | may_fallback = 0; | |
1919 | ||
1920 | if (class == ATA_DEV_ATA) | |
1921 | class = ATA_DEV_ATAPI; | |
1922 | else | |
1923 | class = ATA_DEV_ATA; | |
1924 | goto retry; | |
1925 | } | |
1926 | ||
1927 | /* Control reaches here iff the device aborted | |
1928 | * both flavors of IDENTIFYs which happens | |
1929 | * sometimes with phantom devices. | |
1930 | */ | |
a9a79dfe JP |
1931 | ata_dev_dbg(dev, |
1932 | "both IDENTIFYs aborted, assuming NODEV\n"); | |
1ffc151f | 1933 | return -ENOENT; |
54936f8b TH |
1934 | } |
1935 | ||
49016aca TH |
1936 | rc = -EIO; |
1937 | reason = "I/O error"; | |
1da177e4 LT |
1938 | goto err_out; |
1939 | } | |
1940 | ||
43c9c591 | 1941 | if (dev->horkage & ATA_HORKAGE_DUMP_ID) { |
a9a79dfe JP |
1942 | ata_dev_dbg(dev, "dumping IDENTIFY data, " |
1943 | "class=%d may_fallback=%d tried_spinup=%d\n", | |
1944 | class, may_fallback, tried_spinup); | |
43c9c591 TH |
1945 | print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, |
1946 | 16, 2, id, ATA_ID_WORDS * sizeof(*id), true); | |
1947 | } | |
1948 | ||
54936f8b TH |
1949 | /* Falling back doesn't make sense if ID data was read |
1950 | * successfully at least once. | |
1951 | */ | |
1952 | may_fallback = 0; | |
1953 | ||
49016aca | 1954 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 | 1955 | |
49016aca | 1956 | /* sanity check */ |
a4f5749b | 1957 | rc = -EINVAL; |
6070068b | 1958 | reason = "device reports invalid type"; |
a4f5749b | 1959 | |
9162c657 | 1960 | if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) { |
a4f5749b TH |
1961 | if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) |
1962 | goto err_out; | |
db63a4c8 AW |
1963 | if (ap->host->flags & ATA_HOST_IGNORE_ATA && |
1964 | ata_id_is_ata(id)) { | |
1965 | ata_dev_dbg(dev, | |
1966 | "host indicates ignore ATA devices, ignored\n"); | |
1967 | return -ENOENT; | |
1968 | } | |
a4f5749b TH |
1969 | } else { |
1970 | if (ata_id_is_ata(id)) | |
1971 | goto err_out; | |
49016aca TH |
1972 | } |
1973 | ||
169439c2 ML |
1974 | if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { |
1975 | tried_spinup = 1; | |
1976 | /* | |
1977 | * Drive powered-up in standby mode, and requires a specific | |
1978 | * SET_FEATURES spin-up subcommand before it will accept | |
1979 | * anything other than the original IDENTIFY command. | |
1980 | */ | |
218f3d30 | 1981 | err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); |
fb0582f9 | 1982 | if (err_mask && id[2] != 0x738c) { |
169439c2 ML |
1983 | rc = -EIO; |
1984 | reason = "SPINUP failed"; | |
1985 | goto err_out; | |
1986 | } | |
1987 | /* | |
1988 | * If the drive initially returned incomplete IDENTIFY info, | |
1989 | * we now must reissue the IDENTIFY command. | |
1990 | */ | |
1991 | if (id[2] == 0x37c8) | |
1992 | goto retry; | |
1993 | } | |
1994 | ||
9162c657 HR |
1995 | if ((flags & ATA_READID_POSTRESET) && |
1996 | (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) { | |
49016aca TH |
1997 | /* |
1998 | * The exact sequence expected by certain pre-ATA4 drives is: | |
1999 | * SRST RESET | |
50a99018 AC |
2000 | * IDENTIFY (optional in early ATA) |
2001 | * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) | |
49016aca TH |
2002 | * anything else.. |
2003 | * Some drives were very specific about that exact sequence. | |
50a99018 AC |
2004 | * |
2005 | * Note that ATA4 says lba is mandatory so the second check | |
c9404c9c | 2006 | * should never trigger. |
49016aca TH |
2007 | */ |
2008 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
3373efd8 | 2009 | err_mask = ata_dev_init_params(dev, id[3], id[6]); |
49016aca TH |
2010 | if (err_mask) { |
2011 | rc = -EIO; | |
2012 | reason = "INIT_DEV_PARAMS failed"; | |
2013 | goto err_out; | |
2014 | } | |
2015 | ||
2016 | /* current CHS translation info (id[53-58]) might be | |
2017 | * changed. reread the identify device info. | |
2018 | */ | |
bff04647 | 2019 | flags &= ~ATA_READID_POSTRESET; |
49016aca TH |
2020 | goto retry; |
2021 | } | |
2022 | } | |
2023 | ||
2024 | *p_class = class; | |
fe635c7e | 2025 | |
49016aca TH |
2026 | return 0; |
2027 | ||
2028 | err_out: | |
88574551 | 2029 | if (ata_msg_warn(ap)) |
a9a79dfe JP |
2030 | ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n", |
2031 | reason, err_mask); | |
49016aca TH |
2032 | return rc; |
2033 | } | |
2034 | ||
9062712f TH |
2035 | static int ata_do_link_spd_horkage(struct ata_device *dev) |
2036 | { | |
2037 | struct ata_link *plink = ata_dev_phys_link(dev); | |
2038 | u32 target, target_limit; | |
2039 | ||
2040 | if (!sata_scr_valid(plink)) | |
2041 | return 0; | |
2042 | ||
2043 | if (dev->horkage & ATA_HORKAGE_1_5_GBPS) | |
2044 | target = 1; | |
2045 | else | |
2046 | return 0; | |
2047 | ||
2048 | target_limit = (1 << target) - 1; | |
2049 | ||
2050 | /* if already on stricter limit, no need to push further */ | |
2051 | if (plink->sata_spd_limit <= target_limit) | |
2052 | return 0; | |
2053 | ||
2054 | plink->sata_spd_limit = target_limit; | |
2055 | ||
2056 | /* Request another EH round by returning -EAGAIN if link is | |
2057 | * going faster than the target speed. Forward progress is | |
2058 | * guaranteed by setting sata_spd_limit to target_limit above. | |
2059 | */ | |
2060 | if (plink->sata_spd > target) { | |
a9a79dfe JP |
2061 | ata_dev_info(dev, "applying link speed limit horkage to %s\n", |
2062 | sata_spd_string(target)); | |
9062712f TH |
2063 | return -EAGAIN; |
2064 | } | |
2065 | return 0; | |
2066 | } | |
2067 | ||
3373efd8 | 2068 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
4b2f3ede | 2069 | { |
9af5c9c9 | 2070 | struct ata_port *ap = dev->link->ap; |
9ce8e307 JA |
2071 | |
2072 | if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK) | |
2073 | return 0; | |
2074 | ||
9af5c9c9 | 2075 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); |
4b2f3ede TH |
2076 | } |
2077 | ||
388539f3 | 2078 | static int ata_dev_config_ncq(struct ata_device *dev, |
a6e6ce8e TH |
2079 | char *desc, size_t desc_sz) |
2080 | { | |
9af5c9c9 | 2081 | struct ata_port *ap = dev->link->ap; |
a6e6ce8e | 2082 | int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); |
388539f3 SL |
2083 | unsigned int err_mask; |
2084 | char *aa_desc = ""; | |
a6e6ce8e TH |
2085 | |
2086 | if (!ata_id_has_ncq(dev->id)) { | |
2087 | desc[0] = '\0'; | |
388539f3 | 2088 | return 0; |
a6e6ce8e | 2089 | } |
75683fe7 | 2090 | if (dev->horkage & ATA_HORKAGE_NONCQ) { |
6919a0a6 | 2091 | snprintf(desc, desc_sz, "NCQ (not used)"); |
388539f3 | 2092 | return 0; |
6919a0a6 | 2093 | } |
a6e6ce8e | 2094 | if (ap->flags & ATA_FLAG_NCQ) { |
cca3974e | 2095 | hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
a6e6ce8e TH |
2096 | dev->flags |= ATA_DFLAG_NCQ; |
2097 | } | |
2098 | ||
388539f3 SL |
2099 | if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) && |
2100 | (ap->flags & ATA_FLAG_FPDMA_AA) && | |
2101 | ata_id_has_fpdma_aa(dev->id)) { | |
2102 | err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE, | |
2103 | SATA_FPDMA_AA); | |
2104 | if (err_mask) { | |
a9a79dfe JP |
2105 | ata_dev_err(dev, |
2106 | "failed to enable AA (error_mask=0x%x)\n", | |
2107 | err_mask); | |
388539f3 SL |
2108 | if (err_mask != AC_ERR_DEV) { |
2109 | dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA; | |
2110 | return -EIO; | |
2111 | } | |
2112 | } else | |
2113 | aa_desc = ", AA"; | |
2114 | } | |
2115 | ||
a6e6ce8e | 2116 | if (hdepth >= ddepth) |
388539f3 | 2117 | snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc); |
a6e6ce8e | 2118 | else |
388539f3 SL |
2119 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth, |
2120 | ddepth, aa_desc); | |
ed36911c MC |
2121 | |
2122 | if ((ap->flags & ATA_FLAG_FPDMA_AUX) && | |
2123 | ata_id_has_ncq_send_and_recv(dev->id)) { | |
2124 | err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV, | |
2125 | 0, ap->sector_buf, 1); | |
2126 | if (err_mask) { | |
2127 | ata_dev_dbg(dev, | |
2128 | "failed to get NCQ Send/Recv Log Emask 0x%x\n", | |
2129 | err_mask); | |
2130 | } else { | |
f78dea06 MC |
2131 | u8 *cmds = dev->ncq_send_recv_cmds; |
2132 | ||
ed36911c | 2133 | dev->flags |= ATA_DFLAG_NCQ_SEND_RECV; |
f78dea06 MC |
2134 | memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE); |
2135 | ||
2136 | if (dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) { | |
2137 | ata_dev_dbg(dev, "disabling queued TRIM support\n"); | |
2138 | cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &= | |
2139 | ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM; | |
2140 | } | |
ed36911c MC |
2141 | } |
2142 | } | |
2143 | ||
388539f3 | 2144 | return 0; |
a6e6ce8e TH |
2145 | } |
2146 | ||
49016aca | 2147 | /** |
ffeae418 | 2148 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
ffeae418 TH |
2149 | * @dev: Target device to configure |
2150 | * | |
2151 | * Configure @dev according to @dev->id. Generic and low-level | |
2152 | * driver specific fixups are also applied. | |
49016aca TH |
2153 | * |
2154 | * LOCKING: | |
ffeae418 TH |
2155 | * Kernel thread context (may sleep) |
2156 | * | |
2157 | * RETURNS: | |
2158 | * 0 on success, -errno otherwise | |
49016aca | 2159 | */ |
efdaedc4 | 2160 | int ata_dev_configure(struct ata_device *dev) |
49016aca | 2161 | { |
9af5c9c9 TH |
2162 | struct ata_port *ap = dev->link->ap; |
2163 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
6746544c | 2164 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
1148c3a7 | 2165 | const u16 *id = dev->id; |
7dc951ae | 2166 | unsigned long xfer_mask; |
65fe1f0f | 2167 | unsigned int err_mask; |
b352e57d | 2168 | char revbuf[7]; /* XYZ-99\0 */ |
3f64f565 EM |
2169 | char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
2170 | char modelbuf[ATA_ID_PROD_LEN+1]; | |
e6d902a3 | 2171 | int rc; |
49016aca | 2172 | |
0dd4b21f | 2173 | if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
a9a79dfe | 2174 | ata_dev_info(dev, "%s: ENTER/EXIT -- nodev\n", __func__); |
ffeae418 | 2175 | return 0; |
49016aca TH |
2176 | } |
2177 | ||
0dd4b21f | 2178 | if (ata_msg_probe(ap)) |
a9a79dfe | 2179 | ata_dev_dbg(dev, "%s: ENTER\n", __func__); |
1da177e4 | 2180 | |
75683fe7 TH |
2181 | /* set horkage */ |
2182 | dev->horkage |= ata_dev_blacklisted(dev); | |
33267325 | 2183 | ata_force_horkage(dev); |
75683fe7 | 2184 | |
50af2fa1 | 2185 | if (dev->horkage & ATA_HORKAGE_DISABLE) { |
a9a79dfe | 2186 | ata_dev_info(dev, "unsupported device, disabling\n"); |
50af2fa1 TH |
2187 | ata_dev_disable(dev); |
2188 | return 0; | |
2189 | } | |
2190 | ||
2486fa56 TH |
2191 | if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) && |
2192 | dev->class == ATA_DEV_ATAPI) { | |
a9a79dfe JP |
2193 | ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n", |
2194 | atapi_enabled ? "not supported with this driver" | |
2195 | : "disabled"); | |
2486fa56 TH |
2196 | ata_dev_disable(dev); |
2197 | return 0; | |
2198 | } | |
2199 | ||
9062712f TH |
2200 | rc = ata_do_link_spd_horkage(dev); |
2201 | if (rc) | |
2202 | return rc; | |
2203 | ||
ecd75ad5 TH |
2204 | /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */ |
2205 | if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) && | |
2206 | (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2) | |
2207 | dev->horkage |= ATA_HORKAGE_NOLPM; | |
2208 | ||
2209 | if (dev->horkage & ATA_HORKAGE_NOLPM) { | |
2210 | ata_dev_warn(dev, "LPM support broken, forcing max_power\n"); | |
2211 | dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER; | |
2212 | } | |
2213 | ||
6746544c TH |
2214 | /* let ACPI work its magic */ |
2215 | rc = ata_acpi_on_devcfg(dev); | |
2216 | if (rc) | |
2217 | return rc; | |
08573a86 | 2218 | |
05027adc TH |
2219 | /* massage HPA, do it early as it might change IDENTIFY data */ |
2220 | rc = ata_hpa_resize(dev); | |
2221 | if (rc) | |
2222 | return rc; | |
2223 | ||
c39f5ebe | 2224 | /* print device capabilities */ |
0dd4b21f | 2225 | if (ata_msg_probe(ap)) |
a9a79dfe JP |
2226 | ata_dev_dbg(dev, |
2227 | "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " | |
2228 | "85:%04x 86:%04x 87:%04x 88:%04x\n", | |
2229 | __func__, | |
2230 | id[49], id[82], id[83], id[84], | |
2231 | id[85], id[86], id[87], id[88]); | |
c39f5ebe | 2232 | |
208a9933 | 2233 | /* initialize to-be-configured parameters */ |
ea1dd4e1 | 2234 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
208a9933 TH |
2235 | dev->max_sectors = 0; |
2236 | dev->cdb_len = 0; | |
2237 | dev->n_sectors = 0; | |
2238 | dev->cylinders = 0; | |
2239 | dev->heads = 0; | |
2240 | dev->sectors = 0; | |
e18086d6 | 2241 | dev->multi_count = 0; |
208a9933 | 2242 | |
1da177e4 LT |
2243 | /* |
2244 | * common ATA, ATAPI feature tests | |
2245 | */ | |
2246 | ||
ff8854b2 | 2247 | /* find max transfer mode; for printk only */ |
1148c3a7 | 2248 | xfer_mask = ata_id_xfermask(id); |
1da177e4 | 2249 | |
0dd4b21f BP |
2250 | if (ata_msg_probe(ap)) |
2251 | ata_dump_id(id); | |
1da177e4 | 2252 | |
ef143d57 AL |
2253 | /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
2254 | ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, | |
2255 | sizeof(fwrevbuf)); | |
2256 | ||
2257 | ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, | |
2258 | sizeof(modelbuf)); | |
2259 | ||
1da177e4 | 2260 | /* ATA-specific feature tests */ |
9162c657 | 2261 | if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) { |
b352e57d | 2262 | if (ata_id_is_cfa(id)) { |
62afe5d7 SS |
2263 | /* CPRM may make this media unusable */ |
2264 | if (id[ATA_ID_CFA_KEY_MGMT] & 1) | |
a9a79dfe JP |
2265 | ata_dev_warn(dev, |
2266 | "supports DRM functions and may not be fully accessible\n"); | |
b352e57d | 2267 | snprintf(revbuf, 7, "CFA"); |
ae8d4ee7 | 2268 | } else { |
2dcb407e | 2269 | snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); |
ae8d4ee7 AC |
2270 | /* Warn the user if the device has TPM extensions */ |
2271 | if (ata_id_has_tpm(id)) | |
a9a79dfe JP |
2272 | ata_dev_warn(dev, |
2273 | "supports DRM functions and may not be fully accessible\n"); | |
ae8d4ee7 | 2274 | } |
b352e57d | 2275 | |
1148c3a7 | 2276 | dev->n_sectors = ata_id_n_sectors(id); |
2940740b | 2277 | |
e18086d6 ML |
2278 | /* get current R/W Multiple count setting */ |
2279 | if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) { | |
2280 | unsigned int max = dev->id[47] & 0xff; | |
2281 | unsigned int cnt = dev->id[59] & 0xff; | |
2282 | /* only recognize/allow powers of two here */ | |
2283 | if (is_power_of_2(max) && is_power_of_2(cnt)) | |
2284 | if (cnt <= max) | |
2285 | dev->multi_count = cnt; | |
2286 | } | |
3f64f565 | 2287 | |
1148c3a7 | 2288 | if (ata_id_has_lba(id)) { |
4c2d721a | 2289 | const char *lba_desc; |
388539f3 | 2290 | char ncq_desc[24]; |
8bf62ece | 2291 | |
4c2d721a TH |
2292 | lba_desc = "LBA"; |
2293 | dev->flags |= ATA_DFLAG_LBA; | |
1148c3a7 | 2294 | if (ata_id_has_lba48(id)) { |
8bf62ece | 2295 | dev->flags |= ATA_DFLAG_LBA48; |
4c2d721a | 2296 | lba_desc = "LBA48"; |
6fc49adb TH |
2297 | |
2298 | if (dev->n_sectors >= (1UL << 28) && | |
2299 | ata_id_has_flush_ext(id)) | |
2300 | dev->flags |= ATA_DFLAG_FLUSH_EXT; | |
4c2d721a | 2301 | } |
8bf62ece | 2302 | |
a6e6ce8e | 2303 | /* config NCQ */ |
388539f3 SL |
2304 | rc = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); |
2305 | if (rc) | |
2306 | return rc; | |
a6e6ce8e | 2307 | |
8bf62ece | 2308 | /* print device info to dmesg */ |
3f64f565 | 2309 | if (ata_msg_drv(ap) && print_info) { |
a9a79dfe JP |
2310 | ata_dev_info(dev, "%s: %s, %s, max %s\n", |
2311 | revbuf, modelbuf, fwrevbuf, | |
2312 | ata_mode_string(xfer_mask)); | |
2313 | ata_dev_info(dev, | |
2314 | "%llu sectors, multi %u: %s %s\n", | |
f15a1daf | 2315 | (unsigned long long)dev->n_sectors, |
3f64f565 EM |
2316 | dev->multi_count, lba_desc, ncq_desc); |
2317 | } | |
ffeae418 | 2318 | } else { |
8bf62ece AL |
2319 | /* CHS */ |
2320 | ||
2321 | /* Default translation */ | |
1148c3a7 TH |
2322 | dev->cylinders = id[1]; |
2323 | dev->heads = id[3]; | |
2324 | dev->sectors = id[6]; | |
8bf62ece | 2325 | |
1148c3a7 | 2326 | if (ata_id_current_chs_valid(id)) { |
8bf62ece | 2327 | /* Current CHS translation is valid. */ |
1148c3a7 TH |
2328 | dev->cylinders = id[54]; |
2329 | dev->heads = id[55]; | |
2330 | dev->sectors = id[56]; | |
8bf62ece AL |
2331 | } |
2332 | ||
2333 | /* print device info to dmesg */ | |
3f64f565 | 2334 | if (ata_msg_drv(ap) && print_info) { |
a9a79dfe JP |
2335 | ata_dev_info(dev, "%s: %s, %s, max %s\n", |
2336 | revbuf, modelbuf, fwrevbuf, | |
2337 | ata_mode_string(xfer_mask)); | |
2338 | ata_dev_info(dev, | |
2339 | "%llu sectors, multi %u, CHS %u/%u/%u\n", | |
2340 | (unsigned long long)dev->n_sectors, | |
2341 | dev->multi_count, dev->cylinders, | |
2342 | dev->heads, dev->sectors); | |
3f64f565 | 2343 | } |
07f6f7d0 AL |
2344 | } |
2345 | ||
803739d2 SH |
2346 | /* Check and mark DevSlp capability. Get DevSlp timing variables |
2347 | * from SATA Settings page of Identify Device Data Log. | |
65fe1f0f | 2348 | */ |
803739d2 | 2349 | if (ata_id_has_devslp(dev->id)) { |
8e725c7f | 2350 | u8 *sata_setting = ap->sector_buf; |
803739d2 SH |
2351 | int i, j; |
2352 | ||
2353 | dev->flags |= ATA_DFLAG_DEVSLP; | |
65fe1f0f SH |
2354 | err_mask = ata_read_log_page(dev, |
2355 | ATA_LOG_SATA_ID_DEV_DATA, | |
2356 | ATA_LOG_SATA_SETTINGS, | |
803739d2 | 2357 | sata_setting, |
65fe1f0f SH |
2358 | 1); |
2359 | if (err_mask) | |
2360 | ata_dev_dbg(dev, | |
2361 | "failed to get Identify Device Data, Emask 0x%x\n", | |
2362 | err_mask); | |
803739d2 SH |
2363 | else |
2364 | for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) { | |
2365 | j = ATA_LOG_DEVSLP_OFFSET + i; | |
2366 | dev->devslp_timing[i] = sata_setting[j]; | |
2367 | } | |
65fe1f0f SH |
2368 | } |
2369 | ||
6e7846e9 | 2370 | dev->cdb_len = 16; |
1da177e4 LT |
2371 | } |
2372 | ||
2373 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 2374 | else if (dev->class == ATA_DEV_ATAPI) { |
854c73a2 TH |
2375 | const char *cdb_intr_string = ""; |
2376 | const char *atapi_an_string = ""; | |
91163006 | 2377 | const char *dma_dir_string = ""; |
7d77b247 | 2378 | u32 sntf; |
08a556db | 2379 | |
1148c3a7 | 2380 | rc = atapi_cdb_len(id); |
1da177e4 | 2381 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
0dd4b21f | 2382 | if (ata_msg_warn(ap)) |
a9a79dfe | 2383 | ata_dev_warn(dev, "unsupported CDB len\n"); |
ffeae418 | 2384 | rc = -EINVAL; |
1da177e4 LT |
2385 | goto err_out_nosup; |
2386 | } | |
6e7846e9 | 2387 | dev->cdb_len = (unsigned int) rc; |
1da177e4 | 2388 | |
7d77b247 TH |
2389 | /* Enable ATAPI AN if both the host and device have |
2390 | * the support. If PMP is attached, SNTF is required | |
2391 | * to enable ATAPI AN to discern between PHY status | |
2392 | * changed notifications and ATAPI ANs. | |
9f45cbd3 | 2393 | */ |
e7ecd435 TH |
2394 | if (atapi_an && |
2395 | (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && | |
071f44b1 | 2396 | (!sata_pmp_attached(ap) || |
7d77b247 | 2397 | sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { |
9f45cbd3 | 2398 | /* issue SET feature command to turn this on */ |
218f3d30 JG |
2399 | err_mask = ata_dev_set_feature(dev, |
2400 | SETFEATURES_SATA_ENABLE, SATA_AN); | |
854c73a2 | 2401 | if (err_mask) |
a9a79dfe JP |
2402 | ata_dev_err(dev, |
2403 | "failed to enable ATAPI AN (err_mask=0x%x)\n", | |
2404 | err_mask); | |
854c73a2 | 2405 | else { |
9f45cbd3 | 2406 | dev->flags |= ATA_DFLAG_AN; |
854c73a2 TH |
2407 | atapi_an_string = ", ATAPI AN"; |
2408 | } | |
9f45cbd3 KCA |
2409 | } |
2410 | ||
08a556db | 2411 | if (ata_id_cdb_intr(dev->id)) { |
312f7da2 | 2412 | dev->flags |= ATA_DFLAG_CDB_INTR; |
08a556db AL |
2413 | cdb_intr_string = ", CDB intr"; |
2414 | } | |
312f7da2 | 2415 | |
966fbe19 | 2416 | if (atapi_dmadir || (dev->horkage & ATA_HORKAGE_ATAPI_DMADIR) || atapi_id_dmadir(dev->id)) { |
91163006 TH |
2417 | dev->flags |= ATA_DFLAG_DMADIR; |
2418 | dma_dir_string = ", DMADIR"; | |
2419 | } | |
2420 | ||
afe75951 | 2421 | if (ata_id_has_da(dev->id)) { |
b1354cbb | 2422 | dev->flags |= ATA_DFLAG_DA; |
afe75951 AL |
2423 | zpodd_init(dev); |
2424 | } | |
b1354cbb | 2425 | |
1da177e4 | 2426 | /* print device info to dmesg */ |
5afc8142 | 2427 | if (ata_msg_drv(ap) && print_info) |
a9a79dfe JP |
2428 | ata_dev_info(dev, |
2429 | "ATAPI: %s, %s, max %s%s%s%s\n", | |
2430 | modelbuf, fwrevbuf, | |
2431 | ata_mode_string(xfer_mask), | |
2432 | cdb_intr_string, atapi_an_string, | |
2433 | dma_dir_string); | |
1da177e4 LT |
2434 | } |
2435 | ||
914ed354 TH |
2436 | /* determine max_sectors */ |
2437 | dev->max_sectors = ATA_MAX_SECTORS; | |
2438 | if (dev->flags & ATA_DFLAG_LBA48) | |
2439 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; | |
2440 | ||
c5038fc0 AC |
2441 | /* Limit PATA drive on SATA cable bridge transfers to udma5, |
2442 | 200 sectors */ | |
3373efd8 | 2443 | if (ata_dev_knobble(dev)) { |
5afc8142 | 2444 | if (ata_msg_drv(ap) && print_info) |
a9a79dfe | 2445 | ata_dev_info(dev, "applying bridge limits\n"); |
5a529139 | 2446 | dev->udma_mask &= ATA_UDMA5; |
4b2f3ede TH |
2447 | dev->max_sectors = ATA_MAX_SECTORS; |
2448 | } | |
2449 | ||
f8d8e579 | 2450 | if ((dev->class == ATA_DEV_ATAPI) && |
f442cd86 | 2451 | (atapi_command_packet_set(id) == TYPE_TAPE)) { |
f8d8e579 | 2452 | dev->max_sectors = ATA_MAX_SECTORS_TAPE; |
f442cd86 AL |
2453 | dev->horkage |= ATA_HORKAGE_STUCK_ERR; |
2454 | } | |
f8d8e579 | 2455 | |
75683fe7 | 2456 | if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) |
03ec52de TH |
2457 | dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, |
2458 | dev->max_sectors); | |
18d6e9d5 | 2459 | |
a32450e1 SH |
2460 | if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48) |
2461 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; | |
2462 | ||
4b2f3ede | 2463 | if (ap->ops->dev_config) |
cd0d3bbc | 2464 | ap->ops->dev_config(dev); |
4b2f3ede | 2465 | |
c5038fc0 AC |
2466 | if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
2467 | /* Let the user know. We don't want to disallow opens for | |
2468 | rescue purposes, or in case the vendor is just a blithering | |
2469 | idiot. Do this after the dev_config call as some controllers | |
2470 | with buggy firmware may want to avoid reporting false device | |
2471 | bugs */ | |
2472 | ||
2473 | if (print_info) { | |
a9a79dfe | 2474 | ata_dev_warn(dev, |
c5038fc0 | 2475 | "Drive reports diagnostics failure. This may indicate a drive\n"); |
a9a79dfe | 2476 | ata_dev_warn(dev, |
c5038fc0 AC |
2477 | "fault or invalid emulation. Contact drive vendor for information.\n"); |
2478 | } | |
2479 | } | |
2480 | ||
ac70a964 | 2481 | if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) { |
a9a79dfe JP |
2482 | ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n"); |
2483 | ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n"); | |
ac70a964 TH |
2484 | } |
2485 | ||
ffeae418 | 2486 | return 0; |
1da177e4 LT |
2487 | |
2488 | err_out_nosup: | |
0dd4b21f | 2489 | if (ata_msg_probe(ap)) |
a9a79dfe | 2490 | ata_dev_dbg(dev, "%s: EXIT, err\n", __func__); |
ffeae418 | 2491 | return rc; |
1da177e4 LT |
2492 | } |
2493 | ||
be0d18df | 2494 | /** |
2e41e8e6 | 2495 | * ata_cable_40wire - return 40 wire cable type |
be0d18df AC |
2496 | * @ap: port |
2497 | * | |
2e41e8e6 | 2498 | * Helper method for drivers which want to hardwire 40 wire cable |
be0d18df AC |
2499 | * detection. |
2500 | */ | |
2501 | ||
2502 | int ata_cable_40wire(struct ata_port *ap) | |
2503 | { | |
2504 | return ATA_CBL_PATA40; | |
2505 | } | |
2506 | ||
2507 | /** | |
2e41e8e6 | 2508 | * ata_cable_80wire - return 80 wire cable type |
be0d18df AC |
2509 | * @ap: port |
2510 | * | |
2e41e8e6 | 2511 | * Helper method for drivers which want to hardwire 80 wire cable |
be0d18df AC |
2512 | * detection. |
2513 | */ | |
2514 | ||
2515 | int ata_cable_80wire(struct ata_port *ap) | |
2516 | { | |
2517 | return ATA_CBL_PATA80; | |
2518 | } | |
2519 | ||
2520 | /** | |
2521 | * ata_cable_unknown - return unknown PATA cable. | |
2522 | * @ap: port | |
2523 | * | |
2524 | * Helper method for drivers which have no PATA cable detection. | |
2525 | */ | |
2526 | ||
2527 | int ata_cable_unknown(struct ata_port *ap) | |
2528 | { | |
2529 | return ATA_CBL_PATA_UNK; | |
2530 | } | |
2531 | ||
c88f90c3 TH |
2532 | /** |
2533 | * ata_cable_ignore - return ignored PATA cable. | |
2534 | * @ap: port | |
2535 | * | |
2536 | * Helper method for drivers which don't use cable type to limit | |
2537 | * transfer mode. | |
2538 | */ | |
2539 | int ata_cable_ignore(struct ata_port *ap) | |
2540 | { | |
2541 | return ATA_CBL_PATA_IGN; | |
2542 | } | |
2543 | ||
be0d18df AC |
2544 | /** |
2545 | * ata_cable_sata - return SATA cable type | |
2546 | * @ap: port | |
2547 | * | |
2548 | * Helper method for drivers which have SATA cables | |
2549 | */ | |
2550 | ||
2551 | int ata_cable_sata(struct ata_port *ap) | |
2552 | { | |
2553 | return ATA_CBL_SATA; | |
2554 | } | |
2555 | ||
1da177e4 LT |
2556 | /** |
2557 | * ata_bus_probe - Reset and probe ATA bus | |
2558 | * @ap: Bus to probe | |
2559 | * | |
0cba632b JG |
2560 | * Master ATA bus probing function. Initiates a hardware-dependent |
2561 | * bus reset, then attempts to identify any devices found on | |
2562 | * the bus. | |
2563 | * | |
1da177e4 | 2564 | * LOCKING: |
0cba632b | 2565 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2566 | * |
2567 | * RETURNS: | |
96072e69 | 2568 | * Zero on success, negative errno otherwise. |
1da177e4 LT |
2569 | */ |
2570 | ||
80289167 | 2571 | int ata_bus_probe(struct ata_port *ap) |
1da177e4 | 2572 | { |
28ca5c57 | 2573 | unsigned int classes[ATA_MAX_DEVICES]; |
14d2bac1 | 2574 | int tries[ATA_MAX_DEVICES]; |
f58229f8 | 2575 | int rc; |
e82cbdb9 | 2576 | struct ata_device *dev; |
1da177e4 | 2577 | |
1eca4365 | 2578 | ata_for_each_dev(dev, &ap->link, ALL) |
f58229f8 | 2579 | tries[dev->devno] = ATA_PROBE_MAX_TRIES; |
14d2bac1 TH |
2580 | |
2581 | retry: | |
1eca4365 | 2582 | ata_for_each_dev(dev, &ap->link, ALL) { |
cdeab114 TH |
2583 | /* If we issue an SRST then an ATA drive (not ATAPI) |
2584 | * may change configuration and be in PIO0 timing. If | |
2585 | * we do a hard reset (or are coming from power on) | |
2586 | * this is true for ATA or ATAPI. Until we've set a | |
2587 | * suitable controller mode we should not touch the | |
2588 | * bus as we may be talking too fast. | |
2589 | */ | |
2590 | dev->pio_mode = XFER_PIO_0; | |
5416912a | 2591 | dev->dma_mode = 0xff; |
cdeab114 TH |
2592 | |
2593 | /* If the controller has a pio mode setup function | |
2594 | * then use it to set the chipset to rights. Don't | |
2595 | * touch the DMA setup as that will be dealt with when | |
2596 | * configuring devices. | |
2597 | */ | |
2598 | if (ap->ops->set_piomode) | |
2599 | ap->ops->set_piomode(ap, dev); | |
2600 | } | |
2601 | ||
2044470c | 2602 | /* reset and determine device classes */ |
52783c5d | 2603 | ap->ops->phy_reset(ap); |
2061a47a | 2604 | |
1eca4365 | 2605 | ata_for_each_dev(dev, &ap->link, ALL) { |
3e4ec344 | 2606 | if (dev->class != ATA_DEV_UNKNOWN) |
52783c5d TH |
2607 | classes[dev->devno] = dev->class; |
2608 | else | |
2609 | classes[dev->devno] = ATA_DEV_NONE; | |
2044470c | 2610 | |
52783c5d | 2611 | dev->class = ATA_DEV_UNKNOWN; |
28ca5c57 | 2612 | } |
1da177e4 | 2613 | |
f31f0cc2 JG |
2614 | /* read IDENTIFY page and configure devices. We have to do the identify |
2615 | specific sequence bass-ackwards so that PDIAG- is released by | |
2616 | the slave device */ | |
2617 | ||
1eca4365 | 2618 | ata_for_each_dev(dev, &ap->link, ALL_REVERSE) { |
f58229f8 TH |
2619 | if (tries[dev->devno]) |
2620 | dev->class = classes[dev->devno]; | |
ffeae418 | 2621 | |
14d2bac1 | 2622 | if (!ata_dev_enabled(dev)) |
ffeae418 | 2623 | continue; |
ffeae418 | 2624 | |
bff04647 TH |
2625 | rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
2626 | dev->id); | |
14d2bac1 TH |
2627 | if (rc) |
2628 | goto fail; | |
f31f0cc2 JG |
2629 | } |
2630 | ||
be0d18df AC |
2631 | /* Now ask for the cable type as PDIAG- should have been released */ |
2632 | if (ap->ops->cable_detect) | |
2633 | ap->cbl = ap->ops->cable_detect(ap); | |
2634 | ||
1eca4365 TH |
2635 | /* We may have SATA bridge glue hiding here irrespective of |
2636 | * the reported cable types and sensed types. When SATA | |
2637 | * drives indicate we have a bridge, we don't know which end | |
2638 | * of the link the bridge is which is a problem. | |
2639 | */ | |
2640 | ata_for_each_dev(dev, &ap->link, ENABLED) | |
614fe29b AC |
2641 | if (ata_id_is_sata(dev->id)) |
2642 | ap->cbl = ATA_CBL_SATA; | |
614fe29b | 2643 | |
f31f0cc2 JG |
2644 | /* After the identify sequence we can now set up the devices. We do |
2645 | this in the normal order so that the user doesn't get confused */ | |
2646 | ||
1eca4365 | 2647 | ata_for_each_dev(dev, &ap->link, ENABLED) { |
9af5c9c9 | 2648 | ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; |
efdaedc4 | 2649 | rc = ata_dev_configure(dev); |
9af5c9c9 | 2650 | ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; |
14d2bac1 TH |
2651 | if (rc) |
2652 | goto fail; | |
1da177e4 LT |
2653 | } |
2654 | ||
e82cbdb9 | 2655 | /* configure transfer mode */ |
0260731f | 2656 | rc = ata_set_mode(&ap->link, &dev); |
4ae72a1e | 2657 | if (rc) |
51713d35 | 2658 | goto fail; |
1da177e4 | 2659 | |
1eca4365 TH |
2660 | ata_for_each_dev(dev, &ap->link, ENABLED) |
2661 | return 0; | |
1da177e4 | 2662 | |
96072e69 | 2663 | return -ENODEV; |
14d2bac1 TH |
2664 | |
2665 | fail: | |
4ae72a1e TH |
2666 | tries[dev->devno]--; |
2667 | ||
14d2bac1 TH |
2668 | switch (rc) { |
2669 | case -EINVAL: | |
4ae72a1e | 2670 | /* eeek, something went very wrong, give up */ |
14d2bac1 TH |
2671 | tries[dev->devno] = 0; |
2672 | break; | |
4ae72a1e TH |
2673 | |
2674 | case -ENODEV: | |
2675 | /* give it just one more chance */ | |
2676 | tries[dev->devno] = min(tries[dev->devno], 1); | |
14d2bac1 | 2677 | case -EIO: |
4ae72a1e TH |
2678 | if (tries[dev->devno] == 1) { |
2679 | /* This is the last chance, better to slow | |
2680 | * down than lose it. | |
2681 | */ | |
a07d499b | 2682 | sata_down_spd_limit(&ap->link, 0); |
4ae72a1e TH |
2683 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
2684 | } | |
14d2bac1 TH |
2685 | } |
2686 | ||
4ae72a1e | 2687 | if (!tries[dev->devno]) |
3373efd8 | 2688 | ata_dev_disable(dev); |
ec573755 | 2689 | |
14d2bac1 | 2690 | goto retry; |
1da177e4 LT |
2691 | } |
2692 | ||
3be680b7 TH |
2693 | /** |
2694 | * sata_print_link_status - Print SATA link status | |
936fd732 | 2695 | * @link: SATA link to printk link status about |
3be680b7 TH |
2696 | * |
2697 | * This function prints link speed and status of a SATA link. | |
2698 | * | |
2699 | * LOCKING: | |
2700 | * None. | |
2701 | */ | |
6bdb4fc9 | 2702 | static void sata_print_link_status(struct ata_link *link) |
3be680b7 | 2703 | { |
6d5f9732 | 2704 | u32 sstatus, scontrol, tmp; |
3be680b7 | 2705 | |
936fd732 | 2706 | if (sata_scr_read(link, SCR_STATUS, &sstatus)) |
3be680b7 | 2707 | return; |
936fd732 | 2708 | sata_scr_read(link, SCR_CONTROL, &scontrol); |
3be680b7 | 2709 | |
b1c72916 | 2710 | if (ata_phys_link_online(link)) { |
3be680b7 | 2711 | tmp = (sstatus >> 4) & 0xf; |
a9a79dfe JP |
2712 | ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n", |
2713 | sata_spd_string(tmp), sstatus, scontrol); | |
3be680b7 | 2714 | } else { |
a9a79dfe JP |
2715 | ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n", |
2716 | sstatus, scontrol); | |
3be680b7 TH |
2717 | } |
2718 | } | |
2719 | ||
ebdfca6e AC |
2720 | /** |
2721 | * ata_dev_pair - return other device on cable | |
ebdfca6e AC |
2722 | * @adev: device |
2723 | * | |
2724 | * Obtain the other device on the same cable, or if none is | |
2725 | * present NULL is returned | |
2726 | */ | |
2e9edbf8 | 2727 | |
3373efd8 | 2728 | struct ata_device *ata_dev_pair(struct ata_device *adev) |
ebdfca6e | 2729 | { |
9af5c9c9 TH |
2730 | struct ata_link *link = adev->link; |
2731 | struct ata_device *pair = &link->device[1 - adev->devno]; | |
e1211e3f | 2732 | if (!ata_dev_enabled(pair)) |
ebdfca6e AC |
2733 | return NULL; |
2734 | return pair; | |
2735 | } | |
2736 | ||
1c3fae4d | 2737 | /** |
3c567b7d | 2738 | * sata_down_spd_limit - adjust SATA spd limit downward |
936fd732 | 2739 | * @link: Link to adjust SATA spd limit for |
a07d499b | 2740 | * @spd_limit: Additional limit |
1c3fae4d | 2741 | * |
936fd732 | 2742 | * Adjust SATA spd limit of @link downward. Note that this |
1c3fae4d | 2743 | * function only adjusts the limit. The change must be applied |
3c567b7d | 2744 | * using sata_set_spd(). |
1c3fae4d | 2745 | * |
a07d499b TH |
2746 | * If @spd_limit is non-zero, the speed is limited to equal to or |
2747 | * lower than @spd_limit if such speed is supported. If | |
2748 | * @spd_limit is slower than any supported speed, only the lowest | |
2749 | * supported speed is allowed. | |
2750 | * | |
1c3fae4d TH |
2751 | * LOCKING: |
2752 | * Inherited from caller. | |
2753 | * | |
2754 | * RETURNS: | |
2755 | * 0 on success, negative errno on failure | |
2756 | */ | |
a07d499b | 2757 | int sata_down_spd_limit(struct ata_link *link, u32 spd_limit) |
1c3fae4d | 2758 | { |
81952c54 | 2759 | u32 sstatus, spd, mask; |
a07d499b | 2760 | int rc, bit; |
1c3fae4d | 2761 | |
936fd732 | 2762 | if (!sata_scr_valid(link)) |
008a7896 TH |
2763 | return -EOPNOTSUPP; |
2764 | ||
2765 | /* If SCR can be read, use it to determine the current SPD. | |
936fd732 | 2766 | * If not, use cached value in link->sata_spd. |
008a7896 | 2767 | */ |
936fd732 | 2768 | rc = sata_scr_read(link, SCR_STATUS, &sstatus); |
9913ff8a | 2769 | if (rc == 0 && ata_sstatus_online(sstatus)) |
008a7896 TH |
2770 | spd = (sstatus >> 4) & 0xf; |
2771 | else | |
936fd732 | 2772 | spd = link->sata_spd; |
1c3fae4d | 2773 | |
936fd732 | 2774 | mask = link->sata_spd_limit; |
1c3fae4d TH |
2775 | if (mask <= 1) |
2776 | return -EINVAL; | |
008a7896 TH |
2777 | |
2778 | /* unconditionally mask off the highest bit */ | |
a07d499b TH |
2779 | bit = fls(mask) - 1; |
2780 | mask &= ~(1 << bit); | |
1c3fae4d | 2781 | |
008a7896 TH |
2782 | /* Mask off all speeds higher than or equal to the current |
2783 | * one. Force 1.5Gbps if current SPD is not available. | |
2784 | */ | |
2785 | if (spd > 1) | |
2786 | mask &= (1 << (spd - 1)) - 1; | |
2787 | else | |
2788 | mask &= 1; | |
2789 | ||
2790 | /* were we already at the bottom? */ | |
1c3fae4d TH |
2791 | if (!mask) |
2792 | return -EINVAL; | |
2793 | ||
a07d499b TH |
2794 | if (spd_limit) { |
2795 | if (mask & ((1 << spd_limit) - 1)) | |
2796 | mask &= (1 << spd_limit) - 1; | |
2797 | else { | |
2798 | bit = ffs(mask) - 1; | |
2799 | mask = 1 << bit; | |
2800 | } | |
2801 | } | |
2802 | ||
936fd732 | 2803 | link->sata_spd_limit = mask; |
1c3fae4d | 2804 | |
a9a79dfe JP |
2805 | ata_link_warn(link, "limiting SATA link speed to %s\n", |
2806 | sata_spd_string(fls(mask))); | |
1c3fae4d TH |
2807 | |
2808 | return 0; | |
2809 | } | |
2810 | ||
936fd732 | 2811 | static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) |
1c3fae4d | 2812 | { |
5270222f TH |
2813 | struct ata_link *host_link = &link->ap->link; |
2814 | u32 limit, target, spd; | |
1c3fae4d | 2815 | |
5270222f TH |
2816 | limit = link->sata_spd_limit; |
2817 | ||
2818 | /* Don't configure downstream link faster than upstream link. | |
2819 | * It doesn't speed up anything and some PMPs choke on such | |
2820 | * configuration. | |
2821 | */ | |
2822 | if (!ata_is_host_link(link) && host_link->sata_spd) | |
2823 | limit &= (1 << host_link->sata_spd) - 1; | |
2824 | ||
2825 | if (limit == UINT_MAX) | |
2826 | target = 0; | |
1c3fae4d | 2827 | else |
5270222f | 2828 | target = fls(limit); |
1c3fae4d TH |
2829 | |
2830 | spd = (*scontrol >> 4) & 0xf; | |
5270222f | 2831 | *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4); |
1c3fae4d | 2832 | |
5270222f | 2833 | return spd != target; |
1c3fae4d TH |
2834 | } |
2835 | ||
2836 | /** | |
3c567b7d | 2837 | * sata_set_spd_needed - is SATA spd configuration needed |
936fd732 | 2838 | * @link: Link in question |
1c3fae4d TH |
2839 | * |
2840 | * Test whether the spd limit in SControl matches | |
936fd732 | 2841 | * @link->sata_spd_limit. This function is used to determine |
1c3fae4d TH |
2842 | * whether hardreset is necessary to apply SATA spd |
2843 | * configuration. | |
2844 | * | |
2845 | * LOCKING: | |
2846 | * Inherited from caller. | |
2847 | * | |
2848 | * RETURNS: | |
2849 | * 1 if SATA spd configuration is needed, 0 otherwise. | |
2850 | */ | |
1dc55e87 | 2851 | static int sata_set_spd_needed(struct ata_link *link) |
1c3fae4d TH |
2852 | { |
2853 | u32 scontrol; | |
2854 | ||
936fd732 | 2855 | if (sata_scr_read(link, SCR_CONTROL, &scontrol)) |
db64bcf3 | 2856 | return 1; |
1c3fae4d | 2857 | |
936fd732 | 2858 | return __sata_set_spd_needed(link, &scontrol); |
1c3fae4d TH |
2859 | } |
2860 | ||
2861 | /** | |
3c567b7d | 2862 | * sata_set_spd - set SATA spd according to spd limit |
936fd732 | 2863 | * @link: Link to set SATA spd for |
1c3fae4d | 2864 | * |
936fd732 | 2865 | * Set SATA spd of @link according to sata_spd_limit. |
1c3fae4d TH |
2866 | * |
2867 | * LOCKING: | |
2868 | * Inherited from caller. | |
2869 | * | |
2870 | * RETURNS: | |
2871 | * 0 if spd doesn't need to be changed, 1 if spd has been | |
81952c54 | 2872 | * changed. Negative errno if SCR registers are inaccessible. |
1c3fae4d | 2873 | */ |
936fd732 | 2874 | int sata_set_spd(struct ata_link *link) |
1c3fae4d TH |
2875 | { |
2876 | u32 scontrol; | |
81952c54 | 2877 | int rc; |
1c3fae4d | 2878 | |
936fd732 | 2879 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 2880 | return rc; |
1c3fae4d | 2881 | |
936fd732 | 2882 | if (!__sata_set_spd_needed(link, &scontrol)) |
1c3fae4d TH |
2883 | return 0; |
2884 | ||
936fd732 | 2885 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 TH |
2886 | return rc; |
2887 | ||
1c3fae4d TH |
2888 | return 1; |
2889 | } | |
2890 | ||
452503f9 AC |
2891 | /* |
2892 | * This mode timing computation functionality is ported over from | |
2893 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
2894 | */ | |
2895 | /* | |
b352e57d | 2896 | * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). |
452503f9 | 2897 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
b352e57d AC |
2898 | * for UDMA6, which is currently supported only by Maxtor drives. |
2899 | * | |
2900 | * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. | |
452503f9 AC |
2901 | */ |
2902 | ||
2903 | static const struct ata_timing ata_timing[] = { | |
3ada9c12 DD |
2904 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */ |
2905 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 }, | |
2906 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 }, | |
2907 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 }, | |
2908 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 }, | |
2909 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 }, | |
2910 | { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 }, | |
2911 | { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 }, | |
2912 | ||
2913 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 }, | |
2914 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 }, | |
2915 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 }, | |
2916 | ||
2917 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 }, | |
2918 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 }, | |
2919 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 }, | |
2920 | { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 }, | |
2921 | { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 }, | |
2922 | ||
2923 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
2924 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 }, | |
2925 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
2926 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 }, | |
2927 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
2928 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
2929 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
2930 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
452503f9 AC |
2931 | |
2932 | { 0xFF } | |
2933 | }; | |
2934 | ||
2dcb407e JG |
2935 | #define ENOUGH(v, unit) (((v)-1)/(unit)+1) |
2936 | #define EZ(v, unit) ((v)?ENOUGH(v, unit):0) | |
452503f9 AC |
2937 | |
2938 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
2939 | { | |
3ada9c12 DD |
2940 | q->setup = EZ(t->setup * 1000, T); |
2941 | q->act8b = EZ(t->act8b * 1000, T); | |
2942 | q->rec8b = EZ(t->rec8b * 1000, T); | |
2943 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
2944 | q->active = EZ(t->active * 1000, T); | |
2945 | q->recover = EZ(t->recover * 1000, T); | |
2946 | q->dmack_hold = EZ(t->dmack_hold * 1000, T); | |
2947 | q->cycle = EZ(t->cycle * 1000, T); | |
2948 | q->udma = EZ(t->udma * 1000, UT); | |
452503f9 AC |
2949 | } |
2950 | ||
2951 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
2952 | struct ata_timing *m, unsigned int what) | |
2953 | { | |
2954 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
2955 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
2956 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
2957 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
2958 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
2959 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
3ada9c12 | 2960 | if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold); |
452503f9 AC |
2961 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); |
2962 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
2963 | } | |
2964 | ||
6357357c | 2965 | const struct ata_timing *ata_timing_find_mode(u8 xfer_mode) |
452503f9 | 2966 | { |
70cd071e TH |
2967 | const struct ata_timing *t = ata_timing; |
2968 | ||
2969 | while (xfer_mode > t->mode) | |
2970 | t++; | |
452503f9 | 2971 | |
70cd071e TH |
2972 | if (xfer_mode == t->mode) |
2973 | return t; | |
cd705d5a BP |
2974 | |
2975 | WARN_ONCE(true, "%s: unable to find timing for xfer_mode 0x%x\n", | |
2976 | __func__, xfer_mode); | |
2977 | ||
70cd071e | 2978 | return NULL; |
452503f9 AC |
2979 | } |
2980 | ||
2981 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
2982 | struct ata_timing *t, int T, int UT) | |
2983 | { | |
9e8808a9 | 2984 | const u16 *id = adev->id; |
452503f9 AC |
2985 | const struct ata_timing *s; |
2986 | struct ata_timing p; | |
2987 | ||
2988 | /* | |
2e9edbf8 | 2989 | * Find the mode. |
75b1f2f8 | 2990 | */ |
452503f9 AC |
2991 | |
2992 | if (!(s = ata_timing_find_mode(speed))) | |
2993 | return -EINVAL; | |
2994 | ||
75b1f2f8 AL |
2995 | memcpy(t, s, sizeof(*s)); |
2996 | ||
452503f9 AC |
2997 | /* |
2998 | * If the drive is an EIDE drive, it can tell us it needs extended | |
2999 | * PIO/MW_DMA cycle timing. | |
3000 | */ | |
3001 | ||
9e8808a9 | 3002 | if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ |
452503f9 | 3003 | memset(&p, 0, sizeof(p)); |
9e8808a9 | 3004 | |
bff00256 | 3005 | if (speed >= XFER_PIO_0 && speed < XFER_SW_DMA_0) { |
9e8808a9 BZ |
3006 | if (speed <= XFER_PIO_2) |
3007 | p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO]; | |
3008 | else if ((speed <= XFER_PIO_4) || | |
3009 | (speed == XFER_PIO_5 && !ata_id_is_cfa(id))) | |
3010 | p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY]; | |
3011 | } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) | |
3012 | p.cycle = id[ATA_ID_EIDE_DMA_MIN]; | |
3013 | ||
452503f9 AC |
3014 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); |
3015 | } | |
3016 | ||
3017 | /* | |
3018 | * Convert the timing to bus clock counts. | |
3019 | */ | |
3020 | ||
75b1f2f8 | 3021 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
3022 | |
3023 | /* | |
c893a3ae RD |
3024 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
3025 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
3026 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
3027 | */ |
3028 | ||
fd3367af | 3029 | if (speed > XFER_PIO_6) { |
452503f9 AC |
3030 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
3031 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
3032 | } | |
3033 | ||
3034 | /* | |
c893a3ae | 3035 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
3036 | */ |
3037 | ||
3038 | if (t->act8b + t->rec8b < t->cyc8b) { | |
3039 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
3040 | t->rec8b = t->cyc8b - t->act8b; | |
3041 | } | |
3042 | ||
3043 | if (t->active + t->recover < t->cycle) { | |
3044 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
3045 | t->recover = t->cycle - t->active; | |
3046 | } | |
a617c09f | 3047 | |
4f701d1e AC |
3048 | /* In a few cases quantisation may produce enough errors to |
3049 | leave t->cycle too low for the sum of active and recovery | |
3050 | if so we must correct this */ | |
3051 | if (t->active + t->recover > t->cycle) | |
3052 | t->cycle = t->active + t->recover; | |
452503f9 AC |
3053 | |
3054 | return 0; | |
3055 | } | |
3056 | ||
a0f79b92 TH |
3057 | /** |
3058 | * ata_timing_cycle2mode - find xfer mode for the specified cycle duration | |
3059 | * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. | |
3060 | * @cycle: cycle duration in ns | |
3061 | * | |
3062 | * Return matching xfer mode for @cycle. The returned mode is of | |
3063 | * the transfer type specified by @xfer_shift. If @cycle is too | |
3064 | * slow for @xfer_shift, 0xff is returned. If @cycle is faster | |
3065 | * than the fastest known mode, the fasted mode is returned. | |
3066 | * | |
3067 | * LOCKING: | |
3068 | * None. | |
3069 | * | |
3070 | * RETURNS: | |
3071 | * Matching xfer_mode, 0xff if no match found. | |
3072 | */ | |
3073 | u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) | |
3074 | { | |
3075 | u8 base_mode = 0xff, last_mode = 0xff; | |
3076 | const struct ata_xfer_ent *ent; | |
3077 | const struct ata_timing *t; | |
3078 | ||
3079 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
3080 | if (ent->shift == xfer_shift) | |
3081 | base_mode = ent->base; | |
3082 | ||
3083 | for (t = ata_timing_find_mode(base_mode); | |
3084 | t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { | |
3085 | unsigned short this_cycle; | |
3086 | ||
3087 | switch (xfer_shift) { | |
3088 | case ATA_SHIFT_PIO: | |
3089 | case ATA_SHIFT_MWDMA: | |
3090 | this_cycle = t->cycle; | |
3091 | break; | |
3092 | case ATA_SHIFT_UDMA: | |
3093 | this_cycle = t->udma; | |
3094 | break; | |
3095 | default: | |
3096 | return 0xff; | |
3097 | } | |
3098 | ||
3099 | if (cycle > this_cycle) | |
3100 | break; | |
3101 | ||
3102 | last_mode = t->mode; | |
3103 | } | |
3104 | ||
3105 | return last_mode; | |
3106 | } | |
3107 | ||
cf176e1a TH |
3108 | /** |
3109 | * ata_down_xfermask_limit - adjust dev xfer masks downward | |
cf176e1a | 3110 | * @dev: Device to adjust xfer masks |
458337db | 3111 | * @sel: ATA_DNXFER_* selector |
cf176e1a TH |
3112 | * |
3113 | * Adjust xfer masks of @dev downward. Note that this function | |
3114 | * does not apply the change. Invoking ata_set_mode() afterwards | |
3115 | * will apply the limit. | |
3116 | * | |
3117 | * LOCKING: | |
3118 | * Inherited from caller. | |
3119 | * | |
3120 | * RETURNS: | |
3121 | * 0 on success, negative errno on failure | |
3122 | */ | |
458337db | 3123 | int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
cf176e1a | 3124 | { |
458337db | 3125 | char buf[32]; |
7dc951ae TH |
3126 | unsigned long orig_mask, xfer_mask; |
3127 | unsigned long pio_mask, mwdma_mask, udma_mask; | |
458337db | 3128 | int quiet, highbit; |
cf176e1a | 3129 | |
458337db TH |
3130 | quiet = !!(sel & ATA_DNXFER_QUIET); |
3131 | sel &= ~ATA_DNXFER_QUIET; | |
cf176e1a | 3132 | |
458337db TH |
3133 | xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
3134 | dev->mwdma_mask, | |
3135 | dev->udma_mask); | |
3136 | ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); | |
cf176e1a | 3137 | |
458337db TH |
3138 | switch (sel) { |
3139 | case ATA_DNXFER_PIO: | |
3140 | highbit = fls(pio_mask) - 1; | |
3141 | pio_mask &= ~(1 << highbit); | |
3142 | break; | |
3143 | ||
3144 | case ATA_DNXFER_DMA: | |
3145 | if (udma_mask) { | |
3146 | highbit = fls(udma_mask) - 1; | |
3147 | udma_mask &= ~(1 << highbit); | |
3148 | if (!udma_mask) | |
3149 | return -ENOENT; | |
3150 | } else if (mwdma_mask) { | |
3151 | highbit = fls(mwdma_mask) - 1; | |
3152 | mwdma_mask &= ~(1 << highbit); | |
3153 | if (!mwdma_mask) | |
3154 | return -ENOENT; | |
3155 | } | |
3156 | break; | |
3157 | ||
3158 | case ATA_DNXFER_40C: | |
3159 | udma_mask &= ATA_UDMA_MASK_40C; | |
3160 | break; | |
3161 | ||
3162 | case ATA_DNXFER_FORCE_PIO0: | |
3163 | pio_mask &= 1; | |
3164 | case ATA_DNXFER_FORCE_PIO: | |
3165 | mwdma_mask = 0; | |
3166 | udma_mask = 0; | |
3167 | break; | |
3168 | ||
458337db TH |
3169 | default: |
3170 | BUG(); | |
3171 | } | |
3172 | ||
3173 | xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
3174 | ||
3175 | if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) | |
3176 | return -ENOENT; | |
3177 | ||
3178 | if (!quiet) { | |
3179 | if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) | |
3180 | snprintf(buf, sizeof(buf), "%s:%s", | |
3181 | ata_mode_string(xfer_mask), | |
3182 | ata_mode_string(xfer_mask & ATA_MASK_PIO)); | |
3183 | else | |
3184 | snprintf(buf, sizeof(buf), "%s", | |
3185 | ata_mode_string(xfer_mask)); | |
3186 | ||
a9a79dfe | 3187 | ata_dev_warn(dev, "limiting speed to %s\n", buf); |
458337db | 3188 | } |
cf176e1a TH |
3189 | |
3190 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, | |
3191 | &dev->udma_mask); | |
3192 | ||
cf176e1a | 3193 | return 0; |
cf176e1a TH |
3194 | } |
3195 | ||
3373efd8 | 3196 | static int ata_dev_set_mode(struct ata_device *dev) |
1da177e4 | 3197 | { |
d0cb43b3 | 3198 | struct ata_port *ap = dev->link->ap; |
9af5c9c9 | 3199 | struct ata_eh_context *ehc = &dev->link->eh_context; |
d0cb43b3 | 3200 | const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER; |
4055dee7 TH |
3201 | const char *dev_err_whine = ""; |
3202 | int ign_dev_err = 0; | |
d0cb43b3 | 3203 | unsigned int err_mask = 0; |
83206a29 | 3204 | int rc; |
1da177e4 | 3205 | |
e8384607 | 3206 | dev->flags &= ~ATA_DFLAG_PIO; |
1da177e4 LT |
3207 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
3208 | dev->flags |= ATA_DFLAG_PIO; | |
3209 | ||
d0cb43b3 TH |
3210 | if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id)) |
3211 | dev_err_whine = " (SET_XFERMODE skipped)"; | |
3212 | else { | |
3213 | if (nosetxfer) | |
a9a79dfe JP |
3214 | ata_dev_warn(dev, |
3215 | "NOSETXFER but PATA detected - can't " | |
3216 | "skip SETXFER, might malfunction\n"); | |
d0cb43b3 TH |
3217 | err_mask = ata_dev_set_xfermode(dev); |
3218 | } | |
2dcb407e | 3219 | |
4055dee7 TH |
3220 | if (err_mask & ~AC_ERR_DEV) |
3221 | goto fail; | |
3222 | ||
3223 | /* revalidate */ | |
3224 | ehc->i.flags |= ATA_EHI_POST_SETMODE; | |
3225 | rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); | |
3226 | ehc->i.flags &= ~ATA_EHI_POST_SETMODE; | |
3227 | if (rc) | |
3228 | return rc; | |
3229 | ||
b93fda12 AC |
3230 | if (dev->xfer_shift == ATA_SHIFT_PIO) { |
3231 | /* Old CFA may refuse this command, which is just fine */ | |
3232 | if (ata_id_is_cfa(dev->id)) | |
3233 | ign_dev_err = 1; | |
3234 | /* Catch several broken garbage emulations plus some pre | |
3235 | ATA devices */ | |
3236 | if (ata_id_major_version(dev->id) == 0 && | |
3237 | dev->pio_mode <= XFER_PIO_2) | |
3238 | ign_dev_err = 1; | |
3239 | /* Some very old devices and some bad newer ones fail | |
3240 | any kind of SET_XFERMODE request but support PIO0-2 | |
3241 | timings and no IORDY */ | |
3242 | if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2) | |
3243 | ign_dev_err = 1; | |
3244 | } | |
3acaf94b AC |
3245 | /* Early MWDMA devices do DMA but don't allow DMA mode setting. |
3246 | Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ | |
c5038fc0 | 3247 | if (dev->xfer_shift == ATA_SHIFT_MWDMA && |
3acaf94b AC |
3248 | dev->dma_mode == XFER_MW_DMA_0 && |
3249 | (dev->id[63] >> 8) & 1) | |
4055dee7 | 3250 | ign_dev_err = 1; |
3acaf94b | 3251 | |
4055dee7 TH |
3252 | /* if the device is actually configured correctly, ignore dev err */ |
3253 | if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) | |
3254 | ign_dev_err = 1; | |
1da177e4 | 3255 | |
4055dee7 TH |
3256 | if (err_mask & AC_ERR_DEV) { |
3257 | if (!ign_dev_err) | |
3258 | goto fail; | |
3259 | else | |
3260 | dev_err_whine = " (device error ignored)"; | |
3261 | } | |
48a8a14f | 3262 | |
23e71c3d TH |
3263 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
3264 | dev->xfer_shift, (int)dev->xfer_mode); | |
1da177e4 | 3265 | |
a9a79dfe JP |
3266 | ata_dev_info(dev, "configured for %s%s\n", |
3267 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), | |
3268 | dev_err_whine); | |
4055dee7 | 3269 | |
83206a29 | 3270 | return 0; |
4055dee7 TH |
3271 | |
3272 | fail: | |
a9a79dfe | 3273 | ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask); |
4055dee7 | 3274 | return -EIO; |
1da177e4 LT |
3275 | } |
3276 | ||
1da177e4 | 3277 | /** |
04351821 | 3278 | * ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
0260731f | 3279 | * @link: link on which timings will be programmed |
1967b7ff | 3280 | * @r_failed_dev: out parameter for failed device |
1da177e4 | 3281 | * |
04351821 A |
3282 | * Standard implementation of the function used to tune and set |
3283 | * ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3284 | * ata_dev_set_mode() fails, pointer to the failing device is | |
e82cbdb9 | 3285 | * returned in @r_failed_dev. |
780a87f7 | 3286 | * |
1da177e4 | 3287 | * LOCKING: |
0cba632b | 3288 | * PCI/etc. bus probe sem. |
e82cbdb9 TH |
3289 | * |
3290 | * RETURNS: | |
3291 | * 0 on success, negative errno otherwise | |
1da177e4 | 3292 | */ |
04351821 | 3293 | |
0260731f | 3294 | int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
1da177e4 | 3295 | { |
0260731f | 3296 | struct ata_port *ap = link->ap; |
e8e0619f | 3297 | struct ata_device *dev; |
f58229f8 | 3298 | int rc = 0, used_dma = 0, found = 0; |
3adcebb2 | 3299 | |
a6d5a51c | 3300 | /* step 1: calculate xfer_mask */ |
1eca4365 | 3301 | ata_for_each_dev(dev, link, ENABLED) { |
7dc951ae | 3302 | unsigned long pio_mask, dma_mask; |
b3a70601 | 3303 | unsigned int mode_mask; |
a6d5a51c | 3304 | |
b3a70601 AC |
3305 | mode_mask = ATA_DMA_MASK_ATA; |
3306 | if (dev->class == ATA_DEV_ATAPI) | |
3307 | mode_mask = ATA_DMA_MASK_ATAPI; | |
3308 | else if (ata_id_is_cfa(dev->id)) | |
3309 | mode_mask = ATA_DMA_MASK_CFA; | |
3310 | ||
3373efd8 | 3311 | ata_dev_xfermask(dev); |
33267325 | 3312 | ata_force_xfermask(dev); |
1da177e4 | 3313 | |
acf356b1 | 3314 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
b3a70601 AC |
3315 | |
3316 | if (libata_dma_mask & mode_mask) | |
80a9c430 SS |
3317 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, |
3318 | dev->udma_mask); | |
b3a70601 AC |
3319 | else |
3320 | dma_mask = 0; | |
3321 | ||
acf356b1 TH |
3322 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); |
3323 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
5444a6f4 | 3324 | |
4f65977d | 3325 | found = 1; |
b15b3eba | 3326 | if (ata_dma_enabled(dev)) |
5444a6f4 | 3327 | used_dma = 1; |
a6d5a51c | 3328 | } |
4f65977d | 3329 | if (!found) |
e82cbdb9 | 3330 | goto out; |
a6d5a51c TH |
3331 | |
3332 | /* step 2: always set host PIO timings */ | |
1eca4365 | 3333 | ata_for_each_dev(dev, link, ENABLED) { |
70cd071e | 3334 | if (dev->pio_mode == 0xff) { |
a9a79dfe | 3335 | ata_dev_warn(dev, "no PIO support\n"); |
e8e0619f | 3336 | rc = -EINVAL; |
e82cbdb9 | 3337 | goto out; |
e8e0619f TH |
3338 | } |
3339 | ||
3340 | dev->xfer_mode = dev->pio_mode; | |
3341 | dev->xfer_shift = ATA_SHIFT_PIO; | |
3342 | if (ap->ops->set_piomode) | |
3343 | ap->ops->set_piomode(ap, dev); | |
3344 | } | |
1da177e4 | 3345 | |
a6d5a51c | 3346 | /* step 3: set host DMA timings */ |
1eca4365 TH |
3347 | ata_for_each_dev(dev, link, ENABLED) { |
3348 | if (!ata_dma_enabled(dev)) | |
e8e0619f TH |
3349 | continue; |
3350 | ||
3351 | dev->xfer_mode = dev->dma_mode; | |
3352 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
3353 | if (ap->ops->set_dmamode) | |
3354 | ap->ops->set_dmamode(ap, dev); | |
3355 | } | |
1da177e4 LT |
3356 | |
3357 | /* step 4: update devices' xfer mode */ | |
1eca4365 | 3358 | ata_for_each_dev(dev, link, ENABLED) { |
3373efd8 | 3359 | rc = ata_dev_set_mode(dev); |
5bbc53f4 | 3360 | if (rc) |
e82cbdb9 | 3361 | goto out; |
83206a29 | 3362 | } |
1da177e4 | 3363 | |
e8e0619f TH |
3364 | /* Record simplex status. If we selected DMA then the other |
3365 | * host channels are not permitted to do so. | |
5444a6f4 | 3366 | */ |
cca3974e | 3367 | if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
032af1ce | 3368 | ap->host->simplex_claimed = ap; |
5444a6f4 | 3369 | |
e82cbdb9 TH |
3370 | out: |
3371 | if (rc) | |
3372 | *r_failed_dev = dev; | |
3373 | return rc; | |
1da177e4 LT |
3374 | } |
3375 | ||
aa2731ad TH |
3376 | /** |
3377 | * ata_wait_ready - wait for link to become ready | |
3378 | * @link: link to be waited on | |
3379 | * @deadline: deadline jiffies for the operation | |
3380 | * @check_ready: callback to check link readiness | |
3381 | * | |
3382 | * Wait for @link to become ready. @check_ready should return | |
3383 | * positive number if @link is ready, 0 if it isn't, -ENODEV if | |
3384 | * link doesn't seem to be occupied, other errno for other error | |
3385 | * conditions. | |
3386 | * | |
3387 | * Transient -ENODEV conditions are allowed for | |
3388 | * ATA_TMOUT_FF_WAIT. | |
3389 | * | |
3390 | * LOCKING: | |
3391 | * EH context. | |
3392 | * | |
3393 | * RETURNS: | |
3394 | * 0 if @linke is ready before @deadline; otherwise, -errno. | |
3395 | */ | |
3396 | int ata_wait_ready(struct ata_link *link, unsigned long deadline, | |
3397 | int (*check_ready)(struct ata_link *link)) | |
3398 | { | |
3399 | unsigned long start = jiffies; | |
b48d58f5 | 3400 | unsigned long nodev_deadline; |
aa2731ad TH |
3401 | int warned = 0; |
3402 | ||
b48d58f5 TH |
3403 | /* choose which 0xff timeout to use, read comment in libata.h */ |
3404 | if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN) | |
3405 | nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG); | |
3406 | else | |
3407 | nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT); | |
3408 | ||
b1c72916 TH |
3409 | /* Slave readiness can't be tested separately from master. On |
3410 | * M/S emulation configuration, this function should be called | |
3411 | * only on the master and it will handle both master and slave. | |
3412 | */ | |
3413 | WARN_ON(link == link->ap->slave_link); | |
3414 | ||
aa2731ad TH |
3415 | if (time_after(nodev_deadline, deadline)) |
3416 | nodev_deadline = deadline; | |
3417 | ||
3418 | while (1) { | |
3419 | unsigned long now = jiffies; | |
3420 | int ready, tmp; | |
3421 | ||
3422 | ready = tmp = check_ready(link); | |
3423 | if (ready > 0) | |
3424 | return 0; | |
3425 | ||
b48d58f5 TH |
3426 | /* |
3427 | * -ENODEV could be transient. Ignore -ENODEV if link | |
aa2731ad | 3428 | * is online. Also, some SATA devices take a long |
b48d58f5 TH |
3429 | * time to clear 0xff after reset. Wait for |
3430 | * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't | |
3431 | * offline. | |
aa2731ad TH |
3432 | * |
3433 | * Note that some PATA controllers (pata_ali) explode | |
3434 | * if status register is read more than once when | |
3435 | * there's no device attached. | |
3436 | */ | |
3437 | if (ready == -ENODEV) { | |
3438 | if (ata_link_online(link)) | |
3439 | ready = 0; | |
3440 | else if ((link->ap->flags & ATA_FLAG_SATA) && | |
3441 | !ata_link_offline(link) && | |
3442 | time_before(now, nodev_deadline)) | |
3443 | ready = 0; | |
3444 | } | |
3445 | ||
3446 | if (ready) | |
3447 | return ready; | |
3448 | if (time_after(now, deadline)) | |
3449 | return -EBUSY; | |
3450 | ||
3451 | if (!warned && time_after(now, start + 5 * HZ) && | |
3452 | (deadline - now > 3 * HZ)) { | |
a9a79dfe | 3453 | ata_link_warn(link, |
aa2731ad TH |
3454 | "link is slow to respond, please be patient " |
3455 | "(ready=%d)\n", tmp); | |
3456 | warned = 1; | |
3457 | } | |
3458 | ||
97750ceb | 3459 | ata_msleep(link->ap, 50); |
aa2731ad TH |
3460 | } |
3461 | } | |
3462 | ||
3463 | /** | |
3464 | * ata_wait_after_reset - wait for link to become ready after reset | |
3465 | * @link: link to be waited on | |
3466 | * @deadline: deadline jiffies for the operation | |
3467 | * @check_ready: callback to check link readiness | |
3468 | * | |
3469 | * Wait for @link to become ready after reset. | |
3470 | * | |
3471 | * LOCKING: | |
3472 | * EH context. | |
3473 | * | |
3474 | * RETURNS: | |
3475 | * 0 if @linke is ready before @deadline; otherwise, -errno. | |
3476 | */ | |
2b4221bb | 3477 | int ata_wait_after_reset(struct ata_link *link, unsigned long deadline, |
aa2731ad TH |
3478 | int (*check_ready)(struct ata_link *link)) |
3479 | { | |
97750ceb | 3480 | ata_msleep(link->ap, ATA_WAIT_AFTER_RESET); |
aa2731ad TH |
3481 | |
3482 | return ata_wait_ready(link, deadline, check_ready); | |
3483 | } | |
3484 | ||
d7bb4cc7 | 3485 | /** |
936fd732 TH |
3486 | * sata_link_debounce - debounce SATA phy status |
3487 | * @link: ATA link to debounce SATA phy status for | |
d7bb4cc7 | 3488 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3489 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3490 | * |
1152b261 | 3491 | * Make sure SStatus of @link reaches stable state, determined by |
d7bb4cc7 TH |
3492 | * holding the same value where DET is not 1 for @duration polled |
3493 | * every @interval, before @timeout. Timeout constraints the | |
d4b2bab4 TH |
3494 | * beginning of the stable state. Because DET gets stuck at 1 on |
3495 | * some controllers after hot unplugging, this functions waits | |
d7bb4cc7 TH |
3496 | * until timeout then returns 0 if DET is stable at 1. |
3497 | * | |
d4b2bab4 TH |
3498 | * @timeout is further limited by @deadline. The sooner of the |
3499 | * two is used. | |
3500 | * | |
d7bb4cc7 TH |
3501 | * LOCKING: |
3502 | * Kernel thread context (may sleep) | |
3503 | * | |
3504 | * RETURNS: | |
3505 | * 0 on success, -errno on failure. | |
3506 | */ | |
936fd732 TH |
3507 | int sata_link_debounce(struct ata_link *link, const unsigned long *params, |
3508 | unsigned long deadline) | |
7a7921e8 | 3509 | { |
341c2c95 TH |
3510 | unsigned long interval = params[0]; |
3511 | unsigned long duration = params[1]; | |
d4b2bab4 | 3512 | unsigned long last_jiffies, t; |
d7bb4cc7 TH |
3513 | u32 last, cur; |
3514 | int rc; | |
3515 | ||
341c2c95 | 3516 | t = ata_deadline(jiffies, params[2]); |
d4b2bab4 TH |
3517 | if (time_before(t, deadline)) |
3518 | deadline = t; | |
3519 | ||
936fd732 | 3520 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3521 | return rc; |
3522 | cur &= 0xf; | |
3523 | ||
3524 | last = cur; | |
3525 | last_jiffies = jiffies; | |
3526 | ||
3527 | while (1) { | |
97750ceb | 3528 | ata_msleep(link->ap, interval); |
936fd732 | 3529 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3530 | return rc; |
3531 | cur &= 0xf; | |
3532 | ||
3533 | /* DET stable? */ | |
3534 | if (cur == last) { | |
d4b2bab4 | 3535 | if (cur == 1 && time_before(jiffies, deadline)) |
d7bb4cc7 | 3536 | continue; |
341c2c95 TH |
3537 | if (time_after(jiffies, |
3538 | ata_deadline(last_jiffies, duration))) | |
d7bb4cc7 TH |
3539 | return 0; |
3540 | continue; | |
3541 | } | |
3542 | ||
3543 | /* unstable, start over */ | |
3544 | last = cur; | |
3545 | last_jiffies = jiffies; | |
3546 | ||
f1545154 TH |
3547 | /* Check deadline. If debouncing failed, return |
3548 | * -EPIPE to tell upper layer to lower link speed. | |
3549 | */ | |
d4b2bab4 | 3550 | if (time_after(jiffies, deadline)) |
f1545154 | 3551 | return -EPIPE; |
d7bb4cc7 TH |
3552 | } |
3553 | } | |
3554 | ||
3555 | /** | |
936fd732 TH |
3556 | * sata_link_resume - resume SATA link |
3557 | * @link: ATA link to resume SATA | |
d7bb4cc7 | 3558 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3559 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3560 | * |
936fd732 | 3561 | * Resume SATA phy @link and debounce it. |
d7bb4cc7 TH |
3562 | * |
3563 | * LOCKING: | |
3564 | * Kernel thread context (may sleep) | |
3565 | * | |
3566 | * RETURNS: | |
3567 | * 0 on success, -errno on failure. | |
3568 | */ | |
936fd732 TH |
3569 | int sata_link_resume(struct ata_link *link, const unsigned long *params, |
3570 | unsigned long deadline) | |
d7bb4cc7 | 3571 | { |
5040ab67 | 3572 | int tries = ATA_LINK_RESUME_TRIES; |
ac371987 | 3573 | u32 scontrol, serror; |
81952c54 TH |
3574 | int rc; |
3575 | ||
936fd732 | 3576 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 3577 | return rc; |
7a7921e8 | 3578 | |
5040ab67 TH |
3579 | /* |
3580 | * Writes to SControl sometimes get ignored under certain | |
3581 | * controllers (ata_piix SIDPR). Make sure DET actually is | |
3582 | * cleared. | |
3583 | */ | |
3584 | do { | |
3585 | scontrol = (scontrol & 0x0f0) | 0x300; | |
3586 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) | |
3587 | return rc; | |
3588 | /* | |
3589 | * Some PHYs react badly if SStatus is pounded | |
3590 | * immediately after resuming. Delay 200ms before | |
3591 | * debouncing. | |
3592 | */ | |
97750ceb | 3593 | ata_msleep(link->ap, 200); |
81952c54 | 3594 | |
5040ab67 TH |
3595 | /* is SControl restored correctly? */ |
3596 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) | |
3597 | return rc; | |
3598 | } while ((scontrol & 0xf0f) != 0x300 && --tries); | |
7a7921e8 | 3599 | |
5040ab67 | 3600 | if ((scontrol & 0xf0f) != 0x300) { |
38941c95 | 3601 | ata_link_warn(link, "failed to resume link (SControl %X)\n", |
a9a79dfe | 3602 | scontrol); |
5040ab67 TH |
3603 | return 0; |
3604 | } | |
3605 | ||
3606 | if (tries < ATA_LINK_RESUME_TRIES) | |
a9a79dfe JP |
3607 | ata_link_warn(link, "link resume succeeded after %d retries\n", |
3608 | ATA_LINK_RESUME_TRIES - tries); | |
7a7921e8 | 3609 | |
ac371987 TH |
3610 | if ((rc = sata_link_debounce(link, params, deadline))) |
3611 | return rc; | |
3612 | ||
f046519f | 3613 | /* clear SError, some PHYs require this even for SRST to work */ |
ac371987 TH |
3614 | if (!(rc = sata_scr_read(link, SCR_ERROR, &serror))) |
3615 | rc = sata_scr_write(link, SCR_ERROR, serror); | |
ac371987 | 3616 | |
f046519f | 3617 | return rc != -EINVAL ? rc : 0; |
7a7921e8 TH |
3618 | } |
3619 | ||
1152b261 TH |
3620 | /** |
3621 | * sata_link_scr_lpm - manipulate SControl IPM and SPM fields | |
3622 | * @link: ATA link to manipulate SControl for | |
3623 | * @policy: LPM policy to configure | |
3624 | * @spm_wakeup: initiate LPM transition to active state | |
3625 | * | |
3626 | * Manipulate the IPM field of the SControl register of @link | |
3627 | * according to @policy. If @policy is ATA_LPM_MAX_POWER and | |
3628 | * @spm_wakeup is %true, the SPM field is manipulated to wake up | |
3629 | * the link. This function also clears PHYRDY_CHG before | |
3630 | * returning. | |
3631 | * | |
3632 | * LOCKING: | |
3633 | * EH context. | |
3634 | * | |
3635 | * RETURNS: | |
3636 | * 0 on succes, -errno otherwise. | |
3637 | */ | |
3638 | int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy, | |
3639 | bool spm_wakeup) | |
3640 | { | |
3641 | struct ata_eh_context *ehc = &link->eh_context; | |
3642 | bool woken_up = false; | |
3643 | u32 scontrol; | |
3644 | int rc; | |
3645 | ||
3646 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); | |
3647 | if (rc) | |
3648 | return rc; | |
3649 | ||
3650 | switch (policy) { | |
3651 | case ATA_LPM_MAX_POWER: | |
3652 | /* disable all LPM transitions */ | |
65fe1f0f | 3653 | scontrol |= (0x7 << 8); |
1152b261 TH |
3654 | /* initiate transition to active state */ |
3655 | if (spm_wakeup) { | |
3656 | scontrol |= (0x4 << 12); | |
3657 | woken_up = true; | |
3658 | } | |
3659 | break; | |
3660 | case ATA_LPM_MED_POWER: | |
3661 | /* allow LPM to PARTIAL */ | |
3662 | scontrol &= ~(0x1 << 8); | |
65fe1f0f | 3663 | scontrol |= (0x6 << 8); |
1152b261 TH |
3664 | break; |
3665 | case ATA_LPM_MIN_POWER: | |
8a745f1f KCA |
3666 | if (ata_link_nr_enabled(link) > 0) |
3667 | /* no restrictions on LPM transitions */ | |
65fe1f0f | 3668 | scontrol &= ~(0x7 << 8); |
8a745f1f KCA |
3669 | else { |
3670 | /* empty port, power off */ | |
3671 | scontrol &= ~0xf; | |
3672 | scontrol |= (0x1 << 2); | |
3673 | } | |
1152b261 TH |
3674 | break; |
3675 | default: | |
3676 | WARN_ON(1); | |
3677 | } | |
3678 | ||
3679 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
3680 | if (rc) | |
3681 | return rc; | |
3682 | ||
3683 | /* give the link time to transit out of LPM state */ | |
3684 | if (woken_up) | |
3685 | msleep(10); | |
3686 | ||
3687 | /* clear PHYRDY_CHG from SError */ | |
3688 | ehc->i.serror &= ~SERR_PHYRDY_CHG; | |
3689 | return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG); | |
3690 | } | |
3691 | ||
f5914a46 | 3692 | /** |
0aa1113d | 3693 | * ata_std_prereset - prepare for reset |
cc0680a5 | 3694 | * @link: ATA link to be reset |
d4b2bab4 | 3695 | * @deadline: deadline jiffies for the operation |
f5914a46 | 3696 | * |
cc0680a5 | 3697 | * @link is about to be reset. Initialize it. Failure from |
b8cffc6a TH |
3698 | * prereset makes libata abort whole reset sequence and give up |
3699 | * that port, so prereset should be best-effort. It does its | |
3700 | * best to prepare for reset sequence but if things go wrong, it | |
3701 | * should just whine, not fail. | |
f5914a46 TH |
3702 | * |
3703 | * LOCKING: | |
3704 | * Kernel thread context (may sleep) | |
3705 | * | |
3706 | * RETURNS: | |
3707 | * 0 on success, -errno otherwise. | |
3708 | */ | |
0aa1113d | 3709 | int ata_std_prereset(struct ata_link *link, unsigned long deadline) |
f5914a46 | 3710 | { |
cc0680a5 | 3711 | struct ata_port *ap = link->ap; |
936fd732 | 3712 | struct ata_eh_context *ehc = &link->eh_context; |
e9c83914 | 3713 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
f5914a46 TH |
3714 | int rc; |
3715 | ||
f5914a46 TH |
3716 | /* if we're about to do hardreset, nothing more to do */ |
3717 | if (ehc->i.action & ATA_EH_HARDRESET) | |
3718 | return 0; | |
3719 | ||
936fd732 | 3720 | /* if SATA, resume link */ |
a16abc0b | 3721 | if (ap->flags & ATA_FLAG_SATA) { |
936fd732 | 3722 | rc = sata_link_resume(link, timing, deadline); |
b8cffc6a TH |
3723 | /* whine about phy resume failure but proceed */ |
3724 | if (rc && rc != -EOPNOTSUPP) | |
a9a79dfe JP |
3725 | ata_link_warn(link, |
3726 | "failed to resume link for reset (errno=%d)\n", | |
3727 | rc); | |
f5914a46 TH |
3728 | } |
3729 | ||
45db2f6c | 3730 | /* no point in trying softreset on offline link */ |
b1c72916 | 3731 | if (ata_phys_link_offline(link)) |
45db2f6c TH |
3732 | ehc->i.action &= ~ATA_EH_SOFTRESET; |
3733 | ||
f5914a46 TH |
3734 | return 0; |
3735 | } | |
3736 | ||
c2bd5804 | 3737 | /** |
624d5c51 TH |
3738 | * sata_link_hardreset - reset link via SATA phy reset |
3739 | * @link: link to reset | |
3740 | * @timing: timing parameters { interval, duratinon, timeout } in msec | |
d4b2bab4 | 3741 | * @deadline: deadline jiffies for the operation |
9dadd45b TH |
3742 | * @online: optional out parameter indicating link onlineness |
3743 | * @check_ready: optional callback to check link readiness | |
c2bd5804 | 3744 | * |
624d5c51 | 3745 | * SATA phy-reset @link using DET bits of SControl register. |
9dadd45b TH |
3746 | * After hardreset, link readiness is waited upon using |
3747 | * ata_wait_ready() if @check_ready is specified. LLDs are | |
3748 | * allowed to not specify @check_ready and wait itself after this | |
3749 | * function returns. Device classification is LLD's | |
3750 | * responsibility. | |
3751 | * | |
3752 | * *@online is set to one iff reset succeeded and @link is online | |
3753 | * after reset. | |
c2bd5804 TH |
3754 | * |
3755 | * LOCKING: | |
3756 | * Kernel thread context (may sleep) | |
3757 | * | |
3758 | * RETURNS: | |
3759 | * 0 on success, -errno otherwise. | |
3760 | */ | |
624d5c51 | 3761 | int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, |
9dadd45b TH |
3762 | unsigned long deadline, |
3763 | bool *online, int (*check_ready)(struct ata_link *)) | |
c2bd5804 | 3764 | { |
624d5c51 | 3765 | u32 scontrol; |
81952c54 | 3766 | int rc; |
852ee16a | 3767 | |
c2bd5804 TH |
3768 | DPRINTK("ENTER\n"); |
3769 | ||
9dadd45b TH |
3770 | if (online) |
3771 | *online = false; | |
3772 | ||
936fd732 | 3773 | if (sata_set_spd_needed(link)) { |
1c3fae4d TH |
3774 | /* SATA spec says nothing about how to reconfigure |
3775 | * spd. To be on the safe side, turn off phy during | |
3776 | * reconfiguration. This works for at least ICH7 AHCI | |
3777 | * and Sil3124. | |
3778 | */ | |
936fd732 | 3779 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 3780 | goto out; |
81952c54 | 3781 | |
a34b6fc0 | 3782 | scontrol = (scontrol & 0x0f0) | 0x304; |
81952c54 | 3783 | |
936fd732 | 3784 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
b6103f6d | 3785 | goto out; |
1c3fae4d | 3786 | |
936fd732 | 3787 | sata_set_spd(link); |
1c3fae4d TH |
3788 | } |
3789 | ||
3790 | /* issue phy wake/reset */ | |
936fd732 | 3791 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 3792 | goto out; |
81952c54 | 3793 | |
852ee16a | 3794 | scontrol = (scontrol & 0x0f0) | 0x301; |
81952c54 | 3795 | |
936fd732 | 3796 | if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) |
b6103f6d | 3797 | goto out; |
c2bd5804 | 3798 | |
1c3fae4d | 3799 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
c2bd5804 TH |
3800 | * 10.4.2 says at least 1 ms. |
3801 | */ | |
97750ceb | 3802 | ata_msleep(link->ap, 1); |
c2bd5804 | 3803 | |
936fd732 TH |
3804 | /* bring link back */ |
3805 | rc = sata_link_resume(link, timing, deadline); | |
9dadd45b TH |
3806 | if (rc) |
3807 | goto out; | |
3808 | /* if link is offline nothing more to do */ | |
b1c72916 | 3809 | if (ata_phys_link_offline(link)) |
9dadd45b TH |
3810 | goto out; |
3811 | ||
3812 | /* Link is online. From this point, -ENODEV too is an error. */ | |
3813 | if (online) | |
3814 | *online = true; | |
3815 | ||
071f44b1 | 3816 | if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) { |
9dadd45b TH |
3817 | /* If PMP is supported, we have to do follow-up SRST. |
3818 | * Some PMPs don't send D2H Reg FIS after hardreset if | |
3819 | * the first port is empty. Wait only for | |
3820 | * ATA_TMOUT_PMP_SRST_WAIT. | |
3821 | */ | |
3822 | if (check_ready) { | |
3823 | unsigned long pmp_deadline; | |
3824 | ||
341c2c95 TH |
3825 | pmp_deadline = ata_deadline(jiffies, |
3826 | ATA_TMOUT_PMP_SRST_WAIT); | |
9dadd45b TH |
3827 | if (time_after(pmp_deadline, deadline)) |
3828 | pmp_deadline = deadline; | |
3829 | ata_wait_ready(link, pmp_deadline, check_ready); | |
3830 | } | |
3831 | rc = -EAGAIN; | |
3832 | goto out; | |
3833 | } | |
3834 | ||
3835 | rc = 0; | |
3836 | if (check_ready) | |
3837 | rc = ata_wait_ready(link, deadline, check_ready); | |
b6103f6d | 3838 | out: |
0cbf0711 TH |
3839 | if (rc && rc != -EAGAIN) { |
3840 | /* online is set iff link is online && reset succeeded */ | |
3841 | if (online) | |
3842 | *online = false; | |
a9a79dfe | 3843 | ata_link_err(link, "COMRESET failed (errno=%d)\n", rc); |
0cbf0711 | 3844 | } |
b6103f6d TH |
3845 | DPRINTK("EXIT, rc=%d\n", rc); |
3846 | return rc; | |
3847 | } | |
3848 | ||
57c9efdf TH |
3849 | /** |
3850 | * sata_std_hardreset - COMRESET w/o waiting or classification | |
3851 | * @link: link to reset | |
3852 | * @class: resulting class of attached device | |
3853 | * @deadline: deadline jiffies for the operation | |
3854 | * | |
3855 | * Standard SATA COMRESET w/o waiting or classification. | |
3856 | * | |
3857 | * LOCKING: | |
3858 | * Kernel thread context (may sleep) | |
3859 | * | |
3860 | * RETURNS: | |
3861 | * 0 if link offline, -EAGAIN if link online, -errno on errors. | |
3862 | */ | |
3863 | int sata_std_hardreset(struct ata_link *link, unsigned int *class, | |
3864 | unsigned long deadline) | |
3865 | { | |
3866 | const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); | |
3867 | bool online; | |
3868 | int rc; | |
3869 | ||
3870 | /* do hardreset */ | |
3871 | rc = sata_link_hardreset(link, timing, deadline, &online, NULL); | |
57c9efdf TH |
3872 | return online ? -EAGAIN : rc; |
3873 | } | |
3874 | ||
c2bd5804 | 3875 | /** |
203c75b8 | 3876 | * ata_std_postreset - standard postreset callback |
cc0680a5 | 3877 | * @link: the target ata_link |
c2bd5804 TH |
3878 | * @classes: classes of attached devices |
3879 | * | |
3880 | * This function is invoked after a successful reset. Note that | |
3881 | * the device might have been reset more than once using | |
3882 | * different reset methods before postreset is invoked. | |
c2bd5804 | 3883 | * |
c2bd5804 TH |
3884 | * LOCKING: |
3885 | * Kernel thread context (may sleep) | |
3886 | */ | |
203c75b8 | 3887 | void ata_std_postreset(struct ata_link *link, unsigned int *classes) |
c2bd5804 | 3888 | { |
f046519f TH |
3889 | u32 serror; |
3890 | ||
c2bd5804 TH |
3891 | DPRINTK("ENTER\n"); |
3892 | ||
f046519f TH |
3893 | /* reset complete, clear SError */ |
3894 | if (!sata_scr_read(link, SCR_ERROR, &serror)) | |
3895 | sata_scr_write(link, SCR_ERROR, serror); | |
3896 | ||
c2bd5804 | 3897 | /* print link status */ |
936fd732 | 3898 | sata_print_link_status(link); |
c2bd5804 | 3899 | |
c2bd5804 TH |
3900 | DPRINTK("EXIT\n"); |
3901 | } | |
3902 | ||
623a3128 TH |
3903 | /** |
3904 | * ata_dev_same_device - Determine whether new ID matches configured device | |
623a3128 TH |
3905 | * @dev: device to compare against |
3906 | * @new_class: class of the new device | |
3907 | * @new_id: IDENTIFY page of the new device | |
3908 | * | |
3909 | * Compare @new_class and @new_id against @dev and determine | |
3910 | * whether @dev is the device indicated by @new_class and | |
3911 | * @new_id. | |
3912 | * | |
3913 | * LOCKING: | |
3914 | * None. | |
3915 | * | |
3916 | * RETURNS: | |
3917 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
3918 | */ | |
3373efd8 TH |
3919 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
3920 | const u16 *new_id) | |
623a3128 TH |
3921 | { |
3922 | const u16 *old_id = dev->id; | |
a0cf733b TH |
3923 | unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
3924 | unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; | |
623a3128 TH |
3925 | |
3926 | if (dev->class != new_class) { | |
a9a79dfe JP |
3927 | ata_dev_info(dev, "class mismatch %d != %d\n", |
3928 | dev->class, new_class); | |
623a3128 TH |
3929 | return 0; |
3930 | } | |
3931 | ||
a0cf733b TH |
3932 | ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
3933 | ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); | |
3934 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); | |
3935 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); | |
623a3128 TH |
3936 | |
3937 | if (strcmp(model[0], model[1])) { | |
a9a79dfe JP |
3938 | ata_dev_info(dev, "model number mismatch '%s' != '%s'\n", |
3939 | model[0], model[1]); | |
623a3128 TH |
3940 | return 0; |
3941 | } | |
3942 | ||
3943 | if (strcmp(serial[0], serial[1])) { | |
a9a79dfe JP |
3944 | ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n", |
3945 | serial[0], serial[1]); | |
623a3128 TH |
3946 | return 0; |
3947 | } | |
3948 | ||
623a3128 TH |
3949 | return 1; |
3950 | } | |
3951 | ||
3952 | /** | |
fe30911b | 3953 | * ata_dev_reread_id - Re-read IDENTIFY data |
3fae450c | 3954 | * @dev: target ATA device |
bff04647 | 3955 | * @readid_flags: read ID flags |
623a3128 TH |
3956 | * |
3957 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
3958 | * the port. | |
3959 | * | |
3960 | * LOCKING: | |
3961 | * Kernel thread context (may sleep) | |
3962 | * | |
3963 | * RETURNS: | |
3964 | * 0 on success, negative errno otherwise | |
3965 | */ | |
fe30911b | 3966 | int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) |
623a3128 | 3967 | { |
5eb45c02 | 3968 | unsigned int class = dev->class; |
9af5c9c9 | 3969 | u16 *id = (void *)dev->link->ap->sector_buf; |
623a3128 TH |
3970 | int rc; |
3971 | ||
fe635c7e | 3972 | /* read ID data */ |
bff04647 | 3973 | rc = ata_dev_read_id(dev, &class, readid_flags, id); |
623a3128 | 3974 | if (rc) |
fe30911b | 3975 | return rc; |
623a3128 TH |
3976 | |
3977 | /* is the device still there? */ | |
fe30911b TH |
3978 | if (!ata_dev_same_device(dev, class, id)) |
3979 | return -ENODEV; | |
623a3128 | 3980 | |
fe635c7e | 3981 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
fe30911b TH |
3982 | return 0; |
3983 | } | |
3984 | ||
3985 | /** | |
3986 | * ata_dev_revalidate - Revalidate ATA device | |
3987 | * @dev: device to revalidate | |
422c9daa | 3988 | * @new_class: new class code |
fe30911b TH |
3989 | * @readid_flags: read ID flags |
3990 | * | |
3991 | * Re-read IDENTIFY page, make sure @dev is still attached to the | |
3992 | * port and reconfigure it according to the new IDENTIFY page. | |
3993 | * | |
3994 | * LOCKING: | |
3995 | * Kernel thread context (may sleep) | |
3996 | * | |
3997 | * RETURNS: | |
3998 | * 0 on success, negative errno otherwise | |
3999 | */ | |
422c9daa TH |
4000 | int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, |
4001 | unsigned int readid_flags) | |
fe30911b | 4002 | { |
6ddcd3b0 | 4003 | u64 n_sectors = dev->n_sectors; |
5920dadf | 4004 | u64 n_native_sectors = dev->n_native_sectors; |
fe30911b TH |
4005 | int rc; |
4006 | ||
4007 | if (!ata_dev_enabled(dev)) | |
4008 | return -ENODEV; | |
4009 | ||
422c9daa TH |
4010 | /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ |
4011 | if (ata_class_enabled(new_class) && | |
f0d0613d BP |
4012 | new_class != ATA_DEV_ATA && |
4013 | new_class != ATA_DEV_ATAPI && | |
9162c657 | 4014 | new_class != ATA_DEV_ZAC && |
f0d0613d | 4015 | new_class != ATA_DEV_SEMB) { |
a9a79dfe JP |
4016 | ata_dev_info(dev, "class mismatch %u != %u\n", |
4017 | dev->class, new_class); | |
422c9daa TH |
4018 | rc = -ENODEV; |
4019 | goto fail; | |
4020 | } | |
4021 | ||
fe30911b TH |
4022 | /* re-read ID */ |
4023 | rc = ata_dev_reread_id(dev, readid_flags); | |
4024 | if (rc) | |
4025 | goto fail; | |
623a3128 TH |
4026 | |
4027 | /* configure device according to the new ID */ | |
efdaedc4 | 4028 | rc = ata_dev_configure(dev); |
6ddcd3b0 TH |
4029 | if (rc) |
4030 | goto fail; | |
4031 | ||
4032 | /* verify n_sectors hasn't changed */ | |
445d211b TH |
4033 | if (dev->class != ATA_DEV_ATA || !n_sectors || |
4034 | dev->n_sectors == n_sectors) | |
4035 | return 0; | |
4036 | ||
4037 | /* n_sectors has changed */ | |
a9a79dfe JP |
4038 | ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n", |
4039 | (unsigned long long)n_sectors, | |
4040 | (unsigned long long)dev->n_sectors); | |
445d211b TH |
4041 | |
4042 | /* | |
4043 | * Something could have caused HPA to be unlocked | |
4044 | * involuntarily. If n_native_sectors hasn't changed and the | |
4045 | * new size matches it, keep the device. | |
4046 | */ | |
4047 | if (dev->n_native_sectors == n_native_sectors && | |
4048 | dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) { | |
a9a79dfe JP |
4049 | ata_dev_warn(dev, |
4050 | "new n_sectors matches native, probably " | |
4051 | "late HPA unlock, n_sectors updated\n"); | |
68939ce5 | 4052 | /* use the larger n_sectors */ |
445d211b | 4053 | return 0; |
6ddcd3b0 TH |
4054 | } |
4055 | ||
445d211b TH |
4056 | /* |
4057 | * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try | |
4058 | * unlocking HPA in those cases. | |
4059 | * | |
4060 | * https://bugzilla.kernel.org/show_bug.cgi?id=15396 | |
4061 | */ | |
4062 | if (dev->n_native_sectors == n_native_sectors && | |
4063 | dev->n_sectors < n_sectors && n_sectors == n_native_sectors && | |
4064 | !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) { | |
a9a79dfe JP |
4065 | ata_dev_warn(dev, |
4066 | "old n_sectors matches native, probably " | |
4067 | "late HPA lock, will try to unlock HPA\n"); | |
445d211b TH |
4068 | /* try unlocking HPA */ |
4069 | dev->flags |= ATA_DFLAG_UNLOCK_HPA; | |
4070 | rc = -EIO; | |
4071 | } else | |
4072 | rc = -ENODEV; | |
623a3128 | 4073 | |
445d211b TH |
4074 | /* restore original n_[native_]sectors and fail */ |
4075 | dev->n_native_sectors = n_native_sectors; | |
4076 | dev->n_sectors = n_sectors; | |
623a3128 | 4077 | fail: |
a9a79dfe | 4078 | ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc); |
623a3128 TH |
4079 | return rc; |
4080 | } | |
4081 | ||
6919a0a6 AC |
4082 | struct ata_blacklist_entry { |
4083 | const char *model_num; | |
4084 | const char *model_rev; | |
4085 | unsigned long horkage; | |
4086 | }; | |
4087 | ||
4088 | static const struct ata_blacklist_entry ata_device_blacklist [] = { | |
4089 | /* Devices with DMA related problems under Linux */ | |
4090 | { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, | |
4091 | { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, | |
4092 | { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, | |
4093 | { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, | |
4094 | { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, | |
4095 | { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, | |
4096 | { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, | |
4097 | { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, | |
4098 | { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, | |
7da4c935 | 4099 | { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA }, |
6919a0a6 AC |
4100 | { "CRD-84", NULL, ATA_HORKAGE_NODMA }, |
4101 | { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, | |
4102 | { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, | |
4103 | { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, | |
4104 | { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, | |
7da4c935 | 4105 | { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA }, |
6919a0a6 AC |
4106 | { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, |
4107 | { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, | |
4108 | { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, | |
4109 | { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, | |
4110 | { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, | |
4111 | { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, | |
4112 | { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, | |
4113 | { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, | |
6919a0a6 AC |
4114 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
4115 | { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, | |
2dcb407e | 4116 | { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA }, |
39f19886 | 4117 | { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, |
d17d794c | 4118 | { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA }, |
3af9a77a | 4119 | /* Odd clown on sil3726/4726 PMPs */ |
50af2fa1 | 4120 | { "Config Disk", NULL, ATA_HORKAGE_DISABLE }, |
6919a0a6 | 4121 | |
18d6e9d5 | 4122 | /* Weird ATAPI devices */ |
40a1d531 | 4123 | { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, |
6a87e42e | 4124 | { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA }, |
a32450e1 | 4125 | { "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 }, |
0523f037 | 4126 | { "Slimtype DVD A DS8A9SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 }, |
18d6e9d5 | 4127 | |
6919a0a6 AC |
4128 | /* Devices we expect to fail diagnostics */ |
4129 | ||
4130 | /* Devices where NCQ should be avoided */ | |
4131 | /* NCQ is slow */ | |
2dcb407e | 4132 | { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, |
459ad688 | 4133 | { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, |
09125ea6 TH |
4134 | /* http://thread.gmane.org/gmane.linux.ide/14907 */ |
4135 | { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, | |
7acfaf30 | 4136 | /* NCQ is broken */ |
539cc7c7 | 4137 | { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, |
0e3dbc01 | 4138 | { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, |
da6f0ec2 | 4139 | { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, |
e41bd3e8 | 4140 | { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ }, |
5ccfca97 | 4141 | { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ }, |
539cc7c7 | 4142 | |
ac70a964 | 4143 | /* Seagate NCQ + FLUSH CACHE firmware bug */ |
4d1f9082 | 4144 | { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | |
ac70a964 | 4145 | ATA_HORKAGE_FIRMWARE_WARN }, |
d10d491f | 4146 | |
4d1f9082 | 4147 | { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | |
d10d491f TH |
4148 | ATA_HORKAGE_FIRMWARE_WARN }, |
4149 | ||
4d1f9082 | 4150 | { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | |
d10d491f TH |
4151 | ATA_HORKAGE_FIRMWARE_WARN }, |
4152 | ||
4d1f9082 | 4153 | { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ | |
ac70a964 TH |
4154 | ATA_HORKAGE_FIRMWARE_WARN }, |
4155 | ||
87809942 MB |
4156 | /* Seagate Momentus SpinPoint M8 seem to have FPMDA_AA issues */ |
4157 | { "ST1000LM024 HN-M101MBB", "2AR10001", ATA_HORKAGE_BROKEN_FPDMA_AA }, | |
b28a613e | 4158 | { "ST1000LM024 HN-M101MBB", "2BA30001", ATA_HORKAGE_BROKEN_FPDMA_AA }, |
87809942 | 4159 | |
36e337d0 RH |
4160 | /* Blacklist entries taken from Silicon Image 3124/3132 |
4161 | Windows driver .inf file - also several Linux problem reports */ | |
4162 | { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, | |
4163 | { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, | |
4164 | { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, | |
6919a0a6 | 4165 | |
68b0ddb2 TH |
4166 | /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */ |
4167 | { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ, }, | |
4168 | ||
16c55b03 TH |
4169 | /* devices which puke on READ_NATIVE_MAX */ |
4170 | { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, | |
4171 | { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, | |
4172 | { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, | |
4173 | { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, | |
6919a0a6 | 4174 | |
7831387b TH |
4175 | /* this one allows HPA unlocking but fails IOs on the area */ |
4176 | { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA }, | |
4177 | ||
93328e11 AC |
4178 | /* Devices which report 1 sector over size HPA */ |
4179 | { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
4180 | { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
b152fcd3 | 4181 | { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, }, |
93328e11 | 4182 | |
6bbfd53d AC |
4183 | /* Devices which get the IVB wrong */ |
4184 | { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, }, | |
a79067e5 | 4185 | /* Maybe we should just blacklist TSSTcorp... */ |
7da4c935 | 4186 | { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, }, |
6bbfd53d | 4187 | |
9ce8e307 JA |
4188 | /* Devices that do not need bridging limits applied */ |
4189 | { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, }, | |
04d0f1b8 | 4190 | { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK, }, |
9ce8e307 | 4191 | |
9062712f TH |
4192 | /* Devices which aren't very happy with higher link speeds */ |
4193 | { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, }, | |
c531077f | 4194 | { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, }, |
9062712f | 4195 | |
d0cb43b3 TH |
4196 | /* |
4197 | * Devices which choke on SETXFER. Applies only if both the | |
4198 | * device and controller are SATA. | |
4199 | */ | |
cd691876 | 4200 | { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER }, |
3a25179e VL |
4201 | { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER }, |
4202 | { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER }, | |
cd691876 TH |
4203 | { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER }, |
4204 | { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER }, | |
d0cb43b3 | 4205 | |
f78dea06 | 4206 | /* devices that don't properly handle queued TRIM commands */ |
e61f7d1c MP |
4207 | { "Micron_M[56]*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | |
4208 | ATA_HORKAGE_ZERO_AFTER_TRIM, }, | |
4209 | { "Crucial_CT*SSD*", NULL, ATA_HORKAGE_NO_NCQ_TRIM, }, | |
4210 | ||
4211 | /* | |
4212 | * As defined, the DRAT (Deterministic Read After Trim) and RZAT | |
4213 | * (Return Zero After Trim) flags in the ATA Command Set are | |
4214 | * unreliable in the sense that they only define what happens if | |
4215 | * the device successfully executed the DSM TRIM command. TRIM | |
4216 | * is only advisory, however, and the device is free to silently | |
4217 | * ignore all or parts of the request. | |
4218 | * | |
4219 | * Whitelist drives that are known to reliably return zeroes | |
4220 | * after TRIM. | |
4221 | */ | |
4222 | ||
4223 | /* | |
4224 | * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude | |
4225 | * that model before whitelisting all other intel SSDs. | |
4226 | */ | |
4227 | { "INTEL*SSDSC2MH*", NULL, 0, }, | |
4228 | ||
4229 | { "INTEL*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, | |
4230 | { "SSD*INTEL*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, | |
4231 | { "Samsung*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, | |
4232 | { "SAMSUNG*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, | |
4233 | { "ST[1248][0248]0[FH]*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM, }, | |
f78dea06 | 4234 | |
ecd75ad5 TH |
4235 | /* |
4236 | * Some WD SATA-I drives spin up and down erratically when the link | |
4237 | * is put into the slumber mode. We don't have full list of the | |
4238 | * affected devices. Disable LPM if the device matches one of the | |
4239 | * known prefixes and is SATA-1. As a side effect LPM partial is | |
4240 | * lost too. | |
4241 | * | |
4242 | * https://bugzilla.kernel.org/show_bug.cgi?id=57211 | |
4243 | */ | |
4244 | { "WDC WD800JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, | |
4245 | { "WDC WD1200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, | |
4246 | { "WDC WD1600JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, | |
4247 | { "WDC WD2000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, | |
4248 | { "WDC WD2500JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, | |
4249 | { "WDC WD3000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, | |
4250 | { "WDC WD3200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM }, | |
4251 | ||
6919a0a6 AC |
4252 | /* End Marker */ |
4253 | { } | |
1da177e4 | 4254 | }; |
2e9edbf8 | 4255 | |
75683fe7 | 4256 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev) |
1da177e4 | 4257 | { |
8bfa79fc TH |
4258 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
4259 | unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; | |
6919a0a6 | 4260 | const struct ata_blacklist_entry *ad = ata_device_blacklist; |
3a778275 | 4261 | |
8bfa79fc TH |
4262 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
4263 | ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); | |
1da177e4 | 4264 | |
6919a0a6 | 4265 | while (ad->model_num) { |
1c402799 | 4266 | if (glob_match(ad->model_num, model_num)) { |
6919a0a6 AC |
4267 | if (ad->model_rev == NULL) |
4268 | return ad->horkage; | |
1c402799 | 4269 | if (glob_match(ad->model_rev, model_rev)) |
6919a0a6 | 4270 | return ad->horkage; |
f4b15fef | 4271 | } |
6919a0a6 | 4272 | ad++; |
f4b15fef | 4273 | } |
1da177e4 LT |
4274 | return 0; |
4275 | } | |
4276 | ||
6919a0a6 AC |
4277 | static int ata_dma_blacklisted(const struct ata_device *dev) |
4278 | { | |
4279 | /* We don't support polling DMA. | |
4280 | * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) | |
4281 | * if the LLDD handles only interrupts in the HSM_ST_LAST state. | |
4282 | */ | |
9af5c9c9 | 4283 | if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && |
6919a0a6 AC |
4284 | (dev->flags & ATA_DFLAG_CDB_INTR)) |
4285 | return 1; | |
75683fe7 | 4286 | return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; |
6919a0a6 AC |
4287 | } |
4288 | ||
6bbfd53d AC |
4289 | /** |
4290 | * ata_is_40wire - check drive side detection | |
4291 | * @dev: device | |
4292 | * | |
4293 | * Perform drive side detection decoding, allowing for device vendors | |
4294 | * who can't follow the documentation. | |
4295 | */ | |
4296 | ||
4297 | static int ata_is_40wire(struct ata_device *dev) | |
4298 | { | |
4299 | if (dev->horkage & ATA_HORKAGE_IVB) | |
4300 | return ata_drive_40wire_relaxed(dev->id); | |
4301 | return ata_drive_40wire(dev->id); | |
4302 | } | |
4303 | ||
15a5551c AC |
4304 | /** |
4305 | * cable_is_40wire - 40/80/SATA decider | |
4306 | * @ap: port to consider | |
4307 | * | |
4308 | * This function encapsulates the policy for speed management | |
4309 | * in one place. At the moment we don't cache the result but | |
4310 | * there is a good case for setting ap->cbl to the result when | |
4311 | * we are called with unknown cables (and figuring out if it | |
4312 | * impacts hotplug at all). | |
4313 | * | |
4314 | * Return 1 if the cable appears to be 40 wire. | |
4315 | */ | |
4316 | ||
4317 | static int cable_is_40wire(struct ata_port *ap) | |
4318 | { | |
4319 | struct ata_link *link; | |
4320 | struct ata_device *dev; | |
4321 | ||
4a9c7b33 | 4322 | /* If the controller thinks we are 40 wire, we are. */ |
15a5551c AC |
4323 | if (ap->cbl == ATA_CBL_PATA40) |
4324 | return 1; | |
4a9c7b33 TH |
4325 | |
4326 | /* If the controller thinks we are 80 wire, we are. */ | |
15a5551c AC |
4327 | if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA) |
4328 | return 0; | |
4a9c7b33 TH |
4329 | |
4330 | /* If the system is known to be 40 wire short cable (eg | |
4331 | * laptop), then we allow 80 wire modes even if the drive | |
4332 | * isn't sure. | |
4333 | */ | |
f792068e AC |
4334 | if (ap->cbl == ATA_CBL_PATA40_SHORT) |
4335 | return 0; | |
4a9c7b33 TH |
4336 | |
4337 | /* If the controller doesn't know, we scan. | |
4338 | * | |
4339 | * Note: We look for all 40 wire detects at this point. Any | |
4340 | * 80 wire detect is taken to be 80 wire cable because | |
4341 | * - in many setups only the one drive (slave if present) will | |
4342 | * give a valid detect | |
4343 | * - if you have a non detect capable drive you don't want it | |
4344 | * to colour the choice | |
4345 | */ | |
1eca4365 TH |
4346 | ata_for_each_link(link, ap, EDGE) { |
4347 | ata_for_each_dev(dev, link, ENABLED) { | |
4348 | if (!ata_is_40wire(dev)) | |
15a5551c AC |
4349 | return 0; |
4350 | } | |
4351 | } | |
4352 | return 1; | |
4353 | } | |
4354 | ||
a6d5a51c TH |
4355 | /** |
4356 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
a6d5a51c TH |
4357 | * @dev: Device to compute xfermask for |
4358 | * | |
acf356b1 TH |
4359 | * Compute supported xfermask of @dev and store it in |
4360 | * dev->*_mask. This function is responsible for applying all | |
4361 | * known limits including host controller limits, device | |
4362 | * blacklist, etc... | |
a6d5a51c TH |
4363 | * |
4364 | * LOCKING: | |
4365 | * None. | |
a6d5a51c | 4366 | */ |
3373efd8 | 4367 | static void ata_dev_xfermask(struct ata_device *dev) |
1da177e4 | 4368 | { |
9af5c9c9 TH |
4369 | struct ata_link *link = dev->link; |
4370 | struct ata_port *ap = link->ap; | |
cca3974e | 4371 | struct ata_host *host = ap->host; |
a6d5a51c | 4372 | unsigned long xfer_mask; |
1da177e4 | 4373 | |
37deecb5 | 4374 | /* controller modes available */ |
565083e1 TH |
4375 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
4376 | ap->mwdma_mask, ap->udma_mask); | |
4377 | ||
8343f889 | 4378 | /* drive modes available */ |
37deecb5 TH |
4379 | xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
4380 | dev->mwdma_mask, dev->udma_mask); | |
4381 | xfer_mask &= ata_id_xfermask(dev->id); | |
565083e1 | 4382 | |
b352e57d AC |
4383 | /* |
4384 | * CFA Advanced TrueIDE timings are not allowed on a shared | |
4385 | * cable | |
4386 | */ | |
4387 | if (ata_dev_pair(dev)) { | |
4388 | /* No PIO5 or PIO6 */ | |
4389 | xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); | |
4390 | /* No MWDMA3 or MWDMA 4 */ | |
4391 | xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); | |
4392 | } | |
4393 | ||
37deecb5 TH |
4394 | if (ata_dma_blacklisted(dev)) { |
4395 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
a9a79dfe JP |
4396 | ata_dev_warn(dev, |
4397 | "device is on DMA blacklist, disabling DMA\n"); | |
37deecb5 | 4398 | } |
a6d5a51c | 4399 | |
14d66ab7 | 4400 | if ((host->flags & ATA_HOST_SIMPLEX) && |
2dcb407e | 4401 | host->simplex_claimed && host->simplex_claimed != ap) { |
37deecb5 | 4402 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
a9a79dfe JP |
4403 | ata_dev_warn(dev, |
4404 | "simplex DMA is claimed by other device, disabling DMA\n"); | |
5444a6f4 | 4405 | } |
565083e1 | 4406 | |
e424675f JG |
4407 | if (ap->flags & ATA_FLAG_NO_IORDY) |
4408 | xfer_mask &= ata_pio_mask_no_iordy(dev); | |
4409 | ||
5444a6f4 | 4410 | if (ap->ops->mode_filter) |
a76b62ca | 4411 | xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
5444a6f4 | 4412 | |
8343f889 RH |
4413 | /* Apply cable rule here. Don't apply it early because when |
4414 | * we handle hot plug the cable type can itself change. | |
4415 | * Check this last so that we know if the transfer rate was | |
4416 | * solely limited by the cable. | |
4417 | * Unknown or 80 wire cables reported host side are checked | |
4418 | * drive side as well. Cases where we know a 40wire cable | |
4419 | * is used safely for 80 are not checked here. | |
4420 | */ | |
4421 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) | |
4422 | /* UDMA/44 or higher would be available */ | |
15a5551c | 4423 | if (cable_is_40wire(ap)) { |
a9a79dfe JP |
4424 | ata_dev_warn(dev, |
4425 | "limited to UDMA/33 due to 40-wire cable\n"); | |
8343f889 RH |
4426 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); |
4427 | } | |
4428 | ||
565083e1 TH |
4429 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
4430 | &dev->mwdma_mask, &dev->udma_mask); | |
1da177e4 LT |
4431 | } |
4432 | ||
1da177e4 LT |
4433 | /** |
4434 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
1da177e4 LT |
4435 | * @dev: Device to which command will be sent |
4436 | * | |
780a87f7 JG |
4437 | * Issue SET FEATURES - XFER MODE command to device @dev |
4438 | * on port @ap. | |
4439 | * | |
1da177e4 | 4440 | * LOCKING: |
0cba632b | 4441 | * PCI/etc. bus probe sem. |
83206a29 TH |
4442 | * |
4443 | * RETURNS: | |
4444 | * 0 on success, AC_ERR_* mask otherwise. | |
1da177e4 LT |
4445 | */ |
4446 | ||
3373efd8 | 4447 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
1da177e4 | 4448 | { |
a0123703 | 4449 | struct ata_taskfile tf; |
83206a29 | 4450 | unsigned int err_mask; |
1da177e4 LT |
4451 | |
4452 | /* set up set-features taskfile */ | |
4453 | DPRINTK("set features - xfer mode\n"); | |
4454 | ||
464cf177 TH |
4455 | /* Some controllers and ATAPI devices show flaky interrupt |
4456 | * behavior after setting xfer mode. Use polling instead. | |
4457 | */ | |
3373efd8 | 4458 | ata_tf_init(dev, &tf); |
a0123703 TH |
4459 | tf.command = ATA_CMD_SET_FEATURES; |
4460 | tf.feature = SETFEATURES_XFER; | |
464cf177 | 4461 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; |
a0123703 | 4462 | tf.protocol = ATA_PROT_NODATA; |
b9f8ab2d | 4463 | /* If we are using IORDY we must send the mode setting command */ |
11b7becc JG |
4464 | if (ata_pio_need_iordy(dev)) |
4465 | tf.nsect = dev->xfer_mode; | |
b9f8ab2d AC |
4466 | /* If the device has IORDY and the controller does not - turn it off */ |
4467 | else if (ata_id_has_iordy(dev->id)) | |
11b7becc | 4468 | tf.nsect = 0x01; |
b9f8ab2d AC |
4469 | else /* In the ancient relic department - skip all of this */ |
4470 | return 0; | |
1da177e4 | 4471 | |
2b789108 | 4472 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
9f45cbd3 KCA |
4473 | |
4474 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
4475 | return err_mask; | |
4476 | } | |
1152b261 | 4477 | |
9f45cbd3 | 4478 | /** |
218f3d30 | 4479 | * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES |
9f45cbd3 KCA |
4480 | * @dev: Device to which command will be sent |
4481 | * @enable: Whether to enable or disable the feature | |
218f3d30 | 4482 | * @feature: The sector count represents the feature to set |
9f45cbd3 KCA |
4483 | * |
4484 | * Issue SET FEATURES - SATA FEATURES command to device @dev | |
218f3d30 | 4485 | * on port @ap with sector count |
9f45cbd3 KCA |
4486 | * |
4487 | * LOCKING: | |
4488 | * PCI/etc. bus probe sem. | |
4489 | * | |
4490 | * RETURNS: | |
4491 | * 0 on success, AC_ERR_* mask otherwise. | |
4492 | */ | |
1152b261 | 4493 | unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature) |
9f45cbd3 KCA |
4494 | { |
4495 | struct ata_taskfile tf; | |
4496 | unsigned int err_mask; | |
4497 | ||
4498 | /* set up set-features taskfile */ | |
4499 | DPRINTK("set features - SATA features\n"); | |
4500 | ||
4501 | ata_tf_init(dev, &tf); | |
4502 | tf.command = ATA_CMD_SET_FEATURES; | |
4503 | tf.feature = enable; | |
4504 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4505 | tf.protocol = ATA_PROT_NODATA; | |
218f3d30 | 4506 | tf.nsect = feature; |
9f45cbd3 | 4507 | |
2b789108 | 4508 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
1da177e4 | 4509 | |
83206a29 TH |
4510 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4511 | return err_mask; | |
1da177e4 | 4512 | } |
633de4cc | 4513 | EXPORT_SYMBOL_GPL(ata_dev_set_feature); |
1da177e4 | 4514 | |
8bf62ece AL |
4515 | /** |
4516 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
8bf62ece | 4517 | * @dev: Device to which command will be sent |
e2a7f77a RD |
4518 | * @heads: Number of heads (taskfile parameter) |
4519 | * @sectors: Number of sectors (taskfile parameter) | |
8bf62ece AL |
4520 | * |
4521 | * LOCKING: | |
6aff8f1f TH |
4522 | * Kernel thread context (may sleep) |
4523 | * | |
4524 | * RETURNS: | |
4525 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece | 4526 | */ |
3373efd8 TH |
4527 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
4528 | u16 heads, u16 sectors) | |
8bf62ece | 4529 | { |
a0123703 | 4530 | struct ata_taskfile tf; |
6aff8f1f | 4531 | unsigned int err_mask; |
8bf62ece AL |
4532 | |
4533 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
4534 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
00b6f5e9 | 4535 | return AC_ERR_INVALID; |
8bf62ece AL |
4536 | |
4537 | /* set up init dev params taskfile */ | |
4538 | DPRINTK("init dev params \n"); | |
4539 | ||
3373efd8 | 4540 | ata_tf_init(dev, &tf); |
a0123703 TH |
4541 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
4542 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4543 | tf.protocol = ATA_PROT_NODATA; | |
4544 | tf.nsect = sectors; | |
4545 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 4546 | |
2b789108 | 4547 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
18b2466c AC |
4548 | /* A clean abort indicates an original or just out of spec drive |
4549 | and we should continue as we issue the setup based on the | |
4550 | drive reported working geometry */ | |
4551 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
4552 | err_mask = 0; | |
8bf62ece | 4553 | |
6aff8f1f TH |
4554 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4555 | return err_mask; | |
8bf62ece AL |
4556 | } |
4557 | ||
1da177e4 | 4558 | /** |
0cba632b JG |
4559 | * ata_sg_clean - Unmap DMA memory associated with command |
4560 | * @qc: Command containing DMA memory to be released | |
4561 | * | |
4562 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
4563 | * |
4564 | * LOCKING: | |
cca3974e | 4565 | * spin_lock_irqsave(host lock) |
1da177e4 | 4566 | */ |
70e6ad0c | 4567 | void ata_sg_clean(struct ata_queued_cmd *qc) |
1da177e4 LT |
4568 | { |
4569 | struct ata_port *ap = qc->ap; | |
ff2aeb1e | 4570 | struct scatterlist *sg = qc->sg; |
1da177e4 LT |
4571 | int dir = qc->dma_dir; |
4572 | ||
efcb3cf7 | 4573 | WARN_ON_ONCE(sg == NULL); |
1da177e4 | 4574 | |
dde20207 | 4575 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 4576 | |
dde20207 | 4577 | if (qc->n_elem) |
5825627c | 4578 | dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir); |
1da177e4 LT |
4579 | |
4580 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
ff2aeb1e | 4581 | qc->sg = NULL; |
1da177e4 LT |
4582 | } |
4583 | ||
1da177e4 | 4584 | /** |
5895ef9a | 4585 | * atapi_check_dma - Check whether ATAPI DMA can be supported |
1da177e4 LT |
4586 | * @qc: Metadata associated with taskfile to check |
4587 | * | |
780a87f7 JG |
4588 | * Allow low-level driver to filter ATA PACKET commands, returning |
4589 | * a status indicating whether or not it is OK to use DMA for the | |
4590 | * supplied PACKET command. | |
4591 | * | |
1da177e4 | 4592 | * LOCKING: |
624d5c51 TH |
4593 | * spin_lock_irqsave(host lock) |
4594 | * | |
4595 | * RETURNS: 0 when ATAPI DMA can be used | |
4596 | * nonzero otherwise | |
4597 | */ | |
5895ef9a | 4598 | int atapi_check_dma(struct ata_queued_cmd *qc) |
624d5c51 TH |
4599 | { |
4600 | struct ata_port *ap = qc->ap; | |
71601958 | 4601 | |
624d5c51 TH |
4602 | /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a |
4603 | * few ATAPI devices choke on such DMA requests. | |
4604 | */ | |
6a87e42e TH |
4605 | if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) && |
4606 | unlikely(qc->nbytes & 15)) | |
624d5c51 | 4607 | return 1; |
e2cec771 | 4608 | |
624d5c51 TH |
4609 | if (ap->ops->check_atapi_dma) |
4610 | return ap->ops->check_atapi_dma(qc); | |
e2cec771 | 4611 | |
624d5c51 TH |
4612 | return 0; |
4613 | } | |
1da177e4 | 4614 | |
624d5c51 TH |
4615 | /** |
4616 | * ata_std_qc_defer - Check whether a qc needs to be deferred | |
4617 | * @qc: ATA command in question | |
4618 | * | |
4619 | * Non-NCQ commands cannot run with any other command, NCQ or | |
4620 | * not. As upper layer only knows the queue depth, we are | |
4621 | * responsible for maintaining exclusion. This function checks | |
4622 | * whether a new command @qc can be issued. | |
4623 | * | |
4624 | * LOCKING: | |
4625 | * spin_lock_irqsave(host lock) | |
4626 | * | |
4627 | * RETURNS: | |
4628 | * ATA_DEFER_* if deferring is needed, 0 otherwise. | |
4629 | */ | |
4630 | int ata_std_qc_defer(struct ata_queued_cmd *qc) | |
4631 | { | |
4632 | struct ata_link *link = qc->dev->link; | |
e2cec771 | 4633 | |
624d5c51 TH |
4634 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
4635 | if (!ata_tag_valid(link->active_tag)) | |
4636 | return 0; | |
4637 | } else { | |
4638 | if (!ata_tag_valid(link->active_tag) && !link->sactive) | |
4639 | return 0; | |
4640 | } | |
e2cec771 | 4641 | |
624d5c51 TH |
4642 | return ATA_DEFER_LINK; |
4643 | } | |
6912ccd5 | 4644 | |
624d5c51 | 4645 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
1da177e4 | 4646 | |
624d5c51 TH |
4647 | /** |
4648 | * ata_sg_init - Associate command with scatter-gather table. | |
4649 | * @qc: Command to be associated | |
4650 | * @sg: Scatter-gather table. | |
4651 | * @n_elem: Number of elements in s/g table. | |
4652 | * | |
4653 | * Initialize the data-related elements of queued_cmd @qc | |
4654 | * to point to a scatter-gather table @sg, containing @n_elem | |
4655 | * elements. | |
4656 | * | |
4657 | * LOCKING: | |
4658 | * spin_lock_irqsave(host lock) | |
4659 | */ | |
4660 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, | |
4661 | unsigned int n_elem) | |
4662 | { | |
4663 | qc->sg = sg; | |
4664 | qc->n_elem = n_elem; | |
4665 | qc->cursg = qc->sg; | |
4666 | } | |
bb5cb290 | 4667 | |
624d5c51 TH |
4668 | /** |
4669 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. | |
4670 | * @qc: Command with scatter-gather table to be mapped. | |
4671 | * | |
4672 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
4673 | * | |
4674 | * LOCKING: | |
4675 | * spin_lock_irqsave(host lock) | |
4676 | * | |
4677 | * RETURNS: | |
4678 | * Zero on success, negative on error. | |
4679 | * | |
4680 | */ | |
4681 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
4682 | { | |
4683 | struct ata_port *ap = qc->ap; | |
4684 | unsigned int n_elem; | |
1da177e4 | 4685 | |
624d5c51 | 4686 | VPRINTK("ENTER, ata%u\n", ap->print_id); |
e2cec771 | 4687 | |
624d5c51 TH |
4688 | n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); |
4689 | if (n_elem < 1) | |
4690 | return -1; | |
bb5cb290 | 4691 | |
624d5c51 | 4692 | DPRINTK("%d sg elements mapped\n", n_elem); |
5825627c | 4693 | qc->orig_n_elem = qc->n_elem; |
624d5c51 TH |
4694 | qc->n_elem = n_elem; |
4695 | qc->flags |= ATA_QCFLAG_DMAMAP; | |
1da177e4 | 4696 | |
624d5c51 | 4697 | return 0; |
1da177e4 LT |
4698 | } |
4699 | ||
624d5c51 TH |
4700 | /** |
4701 | * swap_buf_le16 - swap halves of 16-bit words in place | |
4702 | * @buf: Buffer to swap | |
4703 | * @buf_words: Number of 16-bit words in buffer. | |
4704 | * | |
4705 | * Swap halves of 16-bit words if needed to convert from | |
4706 | * little-endian byte order to native cpu byte order, or | |
4707 | * vice-versa. | |
4708 | * | |
4709 | * LOCKING: | |
4710 | * Inherited from caller. | |
4711 | */ | |
4712 | void swap_buf_le16(u16 *buf, unsigned int buf_words) | |
8061f5f0 | 4713 | { |
624d5c51 TH |
4714 | #ifdef __BIG_ENDIAN |
4715 | unsigned int i; | |
8061f5f0 | 4716 | |
624d5c51 TH |
4717 | for (i = 0; i < buf_words; i++) |
4718 | buf[i] = le16_to_cpu(buf[i]); | |
4719 | #endif /* __BIG_ENDIAN */ | |
8061f5f0 TH |
4720 | } |
4721 | ||
8a8bc223 | 4722 | /** |
98bd4be1 SL |
4723 | * ata_qc_new_init - Request an available ATA command, and initialize it |
4724 | * @dev: Device from whom we request an available command structure | |
1871ee13 | 4725 | * |
8a8bc223 TH |
4726 | * LOCKING: |
4727 | * None. | |
4728 | */ | |
4729 | ||
98bd4be1 | 4730 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag) |
8a8bc223 | 4731 | { |
98bd4be1 | 4732 | struct ata_port *ap = dev->link->ap; |
12cb5ce1 | 4733 | struct ata_queued_cmd *qc; |
8a8bc223 TH |
4734 | |
4735 | /* no command while frozen */ | |
4736 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) | |
4737 | return NULL; | |
4738 | ||
98bd4be1 SL |
4739 | /* libsas case */ |
4740 | if (!ap->scsi_host) { | |
4741 | tag = ata_sas_allocate_tag(ap); | |
4742 | if (tag < 0) | |
4743 | return NULL; | |
8a4aeec8 | 4744 | } |
8a8bc223 | 4745 | |
98bd4be1 SL |
4746 | qc = __ata_qc_from_tag(ap, tag); |
4747 | qc->tag = tag; | |
4748 | qc->scsicmd = NULL; | |
4749 | qc->ap = ap; | |
4750 | qc->dev = dev; | |
1da177e4 | 4751 | |
98bd4be1 | 4752 | ata_qc_reinit(qc); |
1da177e4 LT |
4753 | |
4754 | return qc; | |
4755 | } | |
4756 | ||
8a8bc223 TH |
4757 | /** |
4758 | * ata_qc_free - free unused ata_queued_cmd | |
4759 | * @qc: Command to complete | |
4760 | * | |
4761 | * Designed to free unused ata_queued_cmd object | |
4762 | * in case something prevents using it. | |
4763 | * | |
4764 | * LOCKING: | |
4765 | * spin_lock_irqsave(host lock) | |
4766 | */ | |
4767 | void ata_qc_free(struct ata_queued_cmd *qc) | |
4768 | { | |
a1104016 | 4769 | struct ata_port *ap; |
8a8bc223 TH |
4770 | unsigned int tag; |
4771 | ||
efcb3cf7 | 4772 | WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
a1104016 | 4773 | ap = qc->ap; |
8a8bc223 TH |
4774 | |
4775 | qc->flags = 0; | |
4776 | tag = qc->tag; | |
4777 | if (likely(ata_tag_valid(tag))) { | |
4778 | qc->tag = ATA_TAG_POISON; | |
98bd4be1 SL |
4779 | if (!ap->scsi_host) |
4780 | ata_sas_free_tag(tag, ap); | |
8a8bc223 TH |
4781 | } |
4782 | } | |
4783 | ||
76014427 | 4784 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 4785 | { |
a1104016 JL |
4786 | struct ata_port *ap; |
4787 | struct ata_link *link; | |
dedaf2b0 | 4788 | |
efcb3cf7 TH |
4789 | WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
4790 | WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
a1104016 JL |
4791 | ap = qc->ap; |
4792 | link = qc->dev->link; | |
1da177e4 LT |
4793 | |
4794 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4795 | ata_sg_clean(qc); | |
4796 | ||
7401abf2 | 4797 | /* command should be marked inactive atomically with qc completion */ |
da917d69 | 4798 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
9af5c9c9 | 4799 | link->sactive &= ~(1 << qc->tag); |
da917d69 TH |
4800 | if (!link->sactive) |
4801 | ap->nr_active_links--; | |
4802 | } else { | |
9af5c9c9 | 4803 | link->active_tag = ATA_TAG_POISON; |
da917d69 TH |
4804 | ap->nr_active_links--; |
4805 | } | |
4806 | ||
4807 | /* clear exclusive status */ | |
4808 | if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && | |
4809 | ap->excl_link == link)) | |
4810 | ap->excl_link = NULL; | |
7401abf2 | 4811 | |
3f3791d3 AL |
4812 | /* atapi: mark qc as inactive to prevent the interrupt handler |
4813 | * from completing the command twice later, before the error handler | |
4814 | * is called. (when rc != 0 and atapi request sense is needed) | |
4815 | */ | |
4816 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
dedaf2b0 | 4817 | ap->qc_active &= ~(1 << qc->tag); |
3f3791d3 | 4818 | |
1da177e4 | 4819 | /* call completion callback */ |
77853bf2 | 4820 | qc->complete_fn(qc); |
1da177e4 LT |
4821 | } |
4822 | ||
39599a53 TH |
4823 | static void fill_result_tf(struct ata_queued_cmd *qc) |
4824 | { | |
4825 | struct ata_port *ap = qc->ap; | |
4826 | ||
39599a53 | 4827 | qc->result_tf.flags = qc->tf.flags; |
22183bf5 | 4828 | ap->ops->qc_fill_rtf(qc); |
39599a53 TH |
4829 | } |
4830 | ||
00115e0f TH |
4831 | static void ata_verify_xfer(struct ata_queued_cmd *qc) |
4832 | { | |
4833 | struct ata_device *dev = qc->dev; | |
4834 | ||
00115e0f TH |
4835 | if (ata_is_nodata(qc->tf.protocol)) |
4836 | return; | |
4837 | ||
4838 | if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) | |
4839 | return; | |
4840 | ||
4841 | dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; | |
4842 | } | |
4843 | ||
f686bcb8 TH |
4844 | /** |
4845 | * ata_qc_complete - Complete an active ATA command | |
4846 | * @qc: Command to complete | |
f686bcb8 | 4847 | * |
1aadf5c3 TH |
4848 | * Indicate to the mid and upper layers that an ATA command has |
4849 | * completed, with either an ok or not-ok status. | |
4850 | * | |
4851 | * Refrain from calling this function multiple times when | |
4852 | * successfully completing multiple NCQ commands. | |
4853 | * ata_qc_complete_multiple() should be used instead, which will | |
4854 | * properly update IRQ expect state. | |
f686bcb8 TH |
4855 | * |
4856 | * LOCKING: | |
cca3974e | 4857 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
4858 | */ |
4859 | void ata_qc_complete(struct ata_queued_cmd *qc) | |
4860 | { | |
4861 | struct ata_port *ap = qc->ap; | |
4862 | ||
4863 | /* XXX: New EH and old EH use different mechanisms to | |
4864 | * synchronize EH with regular execution path. | |
4865 | * | |
4866 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. | |
4867 | * Normal execution path is responsible for not accessing a | |
4868 | * failed qc. libata core enforces the rule by returning NULL | |
4869 | * from ata_qc_from_tag() for failed qcs. | |
4870 | * | |
4871 | * Old EH depends on ata_qc_complete() nullifying completion | |
4872 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does | |
4873 | * not synchronize with interrupt handler. Only PIO task is | |
4874 | * taken care of. | |
4875 | */ | |
4876 | if (ap->ops->error_handler) { | |
4dbfa39b TH |
4877 | struct ata_device *dev = qc->dev; |
4878 | struct ata_eh_info *ehi = &dev->link->eh_info; | |
4879 | ||
f686bcb8 TH |
4880 | if (unlikely(qc->err_mask)) |
4881 | qc->flags |= ATA_QCFLAG_FAILED; | |
4882 | ||
f08dc1ac TH |
4883 | /* |
4884 | * Finish internal commands without any further processing | |
4885 | * and always with the result TF filled. | |
4886 | */ | |
4887 | if (unlikely(ata_tag_internal(qc->tag))) { | |
f4b31db9 | 4888 | fill_result_tf(qc); |
f08dc1ac TH |
4889 | __ata_qc_complete(qc); |
4890 | return; | |
4891 | } | |
f4b31db9 | 4892 | |
f08dc1ac TH |
4893 | /* |
4894 | * Non-internal qc has failed. Fill the result TF and | |
4895 | * summon EH. | |
4896 | */ | |
4897 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { | |
4898 | fill_result_tf(qc); | |
4899 | ata_qc_schedule_eh(qc); | |
f4b31db9 | 4900 | return; |
f686bcb8 TH |
4901 | } |
4902 | ||
4dc738ed TH |
4903 | WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN); |
4904 | ||
f686bcb8 TH |
4905 | /* read result TF if requested */ |
4906 | if (qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 4907 | fill_result_tf(qc); |
f686bcb8 | 4908 | |
4dbfa39b TH |
4909 | /* Some commands need post-processing after successful |
4910 | * completion. | |
4911 | */ | |
4912 | switch (qc->tf.command) { | |
4913 | case ATA_CMD_SET_FEATURES: | |
4914 | if (qc->tf.feature != SETFEATURES_WC_ON && | |
4915 | qc->tf.feature != SETFEATURES_WC_OFF) | |
4916 | break; | |
4917 | /* fall through */ | |
4918 | case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ | |
4919 | case ATA_CMD_SET_MULTI: /* multi_count changed */ | |
4920 | /* revalidate device */ | |
4921 | ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; | |
4922 | ata_port_schedule_eh(ap); | |
4923 | break; | |
054a5fba TH |
4924 | |
4925 | case ATA_CMD_SLEEP: | |
4926 | dev->flags |= ATA_DFLAG_SLEEPING; | |
4927 | break; | |
4dbfa39b TH |
4928 | } |
4929 | ||
00115e0f TH |
4930 | if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) |
4931 | ata_verify_xfer(qc); | |
4932 | ||
f686bcb8 TH |
4933 | __ata_qc_complete(qc); |
4934 | } else { | |
4935 | if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) | |
4936 | return; | |
4937 | ||
4938 | /* read result TF if failed or requested */ | |
4939 | if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 4940 | fill_result_tf(qc); |
f686bcb8 TH |
4941 | |
4942 | __ata_qc_complete(qc); | |
4943 | } | |
4944 | } | |
4945 | ||
dedaf2b0 TH |
4946 | /** |
4947 | * ata_qc_complete_multiple - Complete multiple qcs successfully | |
4948 | * @ap: port in question | |
4949 | * @qc_active: new qc_active mask | |
dedaf2b0 TH |
4950 | * |
4951 | * Complete in-flight commands. This functions is meant to be | |
4952 | * called from low-level driver's interrupt routine to complete | |
4953 | * requests normally. ap->qc_active and @qc_active is compared | |
4954 | * and commands are completed accordingly. | |
4955 | * | |
1aadf5c3 TH |
4956 | * Always use this function when completing multiple NCQ commands |
4957 | * from IRQ handlers instead of calling ata_qc_complete() | |
4958 | * multiple times to keep IRQ expect status properly in sync. | |
4959 | * | |
dedaf2b0 | 4960 | * LOCKING: |
cca3974e | 4961 | * spin_lock_irqsave(host lock) |
dedaf2b0 TH |
4962 | * |
4963 | * RETURNS: | |
4964 | * Number of completed commands on success, -errno otherwise. | |
4965 | */ | |
79f97dad | 4966 | int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active) |
dedaf2b0 TH |
4967 | { |
4968 | int nr_done = 0; | |
4969 | u32 done_mask; | |
dedaf2b0 TH |
4970 | |
4971 | done_mask = ap->qc_active ^ qc_active; | |
4972 | ||
4973 | if (unlikely(done_mask & qc_active)) { | |
a9a79dfe JP |
4974 | ata_port_err(ap, "illegal qc_active transition (%08x->%08x)\n", |
4975 | ap->qc_active, qc_active); | |
dedaf2b0 TH |
4976 | return -EINVAL; |
4977 | } | |
4978 | ||
43768180 | 4979 | while (done_mask) { |
dedaf2b0 | 4980 | struct ata_queued_cmd *qc; |
43768180 | 4981 | unsigned int tag = __ffs(done_mask); |
dedaf2b0 | 4982 | |
43768180 JA |
4983 | qc = ata_qc_from_tag(ap, tag); |
4984 | if (qc) { | |
dedaf2b0 TH |
4985 | ata_qc_complete(qc); |
4986 | nr_done++; | |
4987 | } | |
43768180 | 4988 | done_mask &= ~(1 << tag); |
dedaf2b0 TH |
4989 | } |
4990 | ||
4991 | return nr_done; | |
4992 | } | |
4993 | ||
1da177e4 LT |
4994 | /** |
4995 | * ata_qc_issue - issue taskfile to device | |
4996 | * @qc: command to issue to device | |
4997 | * | |
4998 | * Prepare an ATA command to submission to device. | |
4999 | * This includes mapping the data into a DMA-able | |
5000 | * area, filling in the S/G table, and finally | |
5001 | * writing the taskfile to hardware, starting the command. | |
5002 | * | |
5003 | * LOCKING: | |
cca3974e | 5004 | * spin_lock_irqsave(host lock) |
1da177e4 | 5005 | */ |
8e0e694a | 5006 | void ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
5007 | { |
5008 | struct ata_port *ap = qc->ap; | |
9af5c9c9 | 5009 | struct ata_link *link = qc->dev->link; |
405e66b3 | 5010 | u8 prot = qc->tf.protocol; |
1da177e4 | 5011 | |
dedaf2b0 TH |
5012 | /* Make sure only one non-NCQ command is outstanding. The |
5013 | * check is skipped for old EH because it reuses active qc to | |
5014 | * request ATAPI sense. | |
5015 | */ | |
efcb3cf7 | 5016 | WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag)); |
dedaf2b0 | 5017 | |
1973a023 | 5018 | if (ata_is_ncq(prot)) { |
efcb3cf7 | 5019 | WARN_ON_ONCE(link->sactive & (1 << qc->tag)); |
da917d69 TH |
5020 | |
5021 | if (!link->sactive) | |
5022 | ap->nr_active_links++; | |
9af5c9c9 | 5023 | link->sactive |= 1 << qc->tag; |
dedaf2b0 | 5024 | } else { |
efcb3cf7 | 5025 | WARN_ON_ONCE(link->sactive); |
da917d69 TH |
5026 | |
5027 | ap->nr_active_links++; | |
9af5c9c9 | 5028 | link->active_tag = qc->tag; |
dedaf2b0 TH |
5029 | } |
5030 | ||
e4a70e76 | 5031 | qc->flags |= ATA_QCFLAG_ACTIVE; |
dedaf2b0 | 5032 | ap->qc_active |= 1 << qc->tag; |
e4a70e76 | 5033 | |
60f5d6ef TH |
5034 | /* |
5035 | * We guarantee to LLDs that they will have at least one | |
f92a2636 TH |
5036 | * non-zero sg if the command is a data command. |
5037 | */ | |
60f5d6ef TH |
5038 | if (WARN_ON_ONCE(ata_is_data(prot) && |
5039 | (!qc->sg || !qc->n_elem || !qc->nbytes))) | |
5040 | goto sys_err; | |
f92a2636 | 5041 | |
405e66b3 | 5042 | if (ata_is_dma(prot) || (ata_is_pio(prot) && |
f92a2636 | 5043 | (ap->flags & ATA_FLAG_PIO_DMA))) |
001102d7 | 5044 | if (ata_sg_setup(qc)) |
60f5d6ef | 5045 | goto sys_err; |
1da177e4 | 5046 | |
cf480626 | 5047 | /* if device is sleeping, schedule reset and abort the link */ |
054a5fba | 5048 | if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { |
cf480626 | 5049 | link->eh_info.action |= ATA_EH_RESET; |
054a5fba TH |
5050 | ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); |
5051 | ata_link_abort(link); | |
5052 | return; | |
5053 | } | |
5054 | ||
1da177e4 LT |
5055 | ap->ops->qc_prep(qc); |
5056 | ||
8e0e694a TH |
5057 | qc->err_mask |= ap->ops->qc_issue(qc); |
5058 | if (unlikely(qc->err_mask)) | |
5059 | goto err; | |
5060 | return; | |
1da177e4 | 5061 | |
60f5d6ef | 5062 | sys_err: |
8e0e694a TH |
5063 | qc->err_mask |= AC_ERR_SYSTEM; |
5064 | err: | |
5065 | ata_qc_complete(qc); | |
1da177e4 LT |
5066 | } |
5067 | ||
34bf2170 TH |
5068 | /** |
5069 | * sata_scr_valid - test whether SCRs are accessible | |
936fd732 | 5070 | * @link: ATA link to test SCR accessibility for |
34bf2170 | 5071 | * |
936fd732 | 5072 | * Test whether SCRs are accessible for @link. |
34bf2170 TH |
5073 | * |
5074 | * LOCKING: | |
5075 | * None. | |
5076 | * | |
5077 | * RETURNS: | |
5078 | * 1 if SCRs are accessible, 0 otherwise. | |
5079 | */ | |
936fd732 | 5080 | int sata_scr_valid(struct ata_link *link) |
34bf2170 | 5081 | { |
936fd732 TH |
5082 | struct ata_port *ap = link->ap; |
5083 | ||
a16abc0b | 5084 | return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; |
34bf2170 TH |
5085 | } |
5086 | ||
5087 | /** | |
5088 | * sata_scr_read - read SCR register of the specified port | |
936fd732 | 5089 | * @link: ATA link to read SCR for |
34bf2170 TH |
5090 | * @reg: SCR to read |
5091 | * @val: Place to store read value | |
5092 | * | |
936fd732 | 5093 | * Read SCR register @reg of @link into *@val. This function is |
633273a3 TH |
5094 | * guaranteed to succeed if @link is ap->link, the cable type of |
5095 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
5096 | * |
5097 | * LOCKING: | |
633273a3 | 5098 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
5099 | * |
5100 | * RETURNS: | |
5101 | * 0 on success, negative errno on failure. | |
5102 | */ | |
936fd732 | 5103 | int sata_scr_read(struct ata_link *link, int reg, u32 *val) |
34bf2170 | 5104 | { |
633273a3 | 5105 | if (ata_is_host_link(link)) { |
633273a3 | 5106 | if (sata_scr_valid(link)) |
82ef04fb | 5107 | return link->ap->ops->scr_read(link, reg, val); |
633273a3 TH |
5108 | return -EOPNOTSUPP; |
5109 | } | |
5110 | ||
5111 | return sata_pmp_scr_read(link, reg, val); | |
34bf2170 TH |
5112 | } |
5113 | ||
5114 | /** | |
5115 | * sata_scr_write - write SCR register of the specified port | |
936fd732 | 5116 | * @link: ATA link to write SCR for |
34bf2170 TH |
5117 | * @reg: SCR to write |
5118 | * @val: value to write | |
5119 | * | |
936fd732 | 5120 | * Write @val to SCR register @reg of @link. This function is |
633273a3 TH |
5121 | * guaranteed to succeed if @link is ap->link, the cable type of |
5122 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
5123 | * |
5124 | * LOCKING: | |
633273a3 | 5125 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
5126 | * |
5127 | * RETURNS: | |
5128 | * 0 on success, negative errno on failure. | |
5129 | */ | |
936fd732 | 5130 | int sata_scr_write(struct ata_link *link, int reg, u32 val) |
34bf2170 | 5131 | { |
633273a3 | 5132 | if (ata_is_host_link(link)) { |
633273a3 | 5133 | if (sata_scr_valid(link)) |
82ef04fb | 5134 | return link->ap->ops->scr_write(link, reg, val); |
633273a3 TH |
5135 | return -EOPNOTSUPP; |
5136 | } | |
936fd732 | 5137 | |
633273a3 | 5138 | return sata_pmp_scr_write(link, reg, val); |
34bf2170 TH |
5139 | } |
5140 | ||
5141 | /** | |
5142 | * sata_scr_write_flush - write SCR register of the specified port and flush | |
936fd732 | 5143 | * @link: ATA link to write SCR for |
34bf2170 TH |
5144 | * @reg: SCR to write |
5145 | * @val: value to write | |
5146 | * | |
5147 | * This function is identical to sata_scr_write() except that this | |
5148 | * function performs flush after writing to the register. | |
5149 | * | |
5150 | * LOCKING: | |
633273a3 | 5151 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
5152 | * |
5153 | * RETURNS: | |
5154 | * 0 on success, negative errno on failure. | |
5155 | */ | |
936fd732 | 5156 | int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) |
34bf2170 | 5157 | { |
633273a3 | 5158 | if (ata_is_host_link(link)) { |
633273a3 | 5159 | int rc; |
da3dbb17 | 5160 | |
633273a3 | 5161 | if (sata_scr_valid(link)) { |
82ef04fb | 5162 | rc = link->ap->ops->scr_write(link, reg, val); |
633273a3 | 5163 | if (rc == 0) |
82ef04fb | 5164 | rc = link->ap->ops->scr_read(link, reg, &val); |
633273a3 TH |
5165 | return rc; |
5166 | } | |
5167 | return -EOPNOTSUPP; | |
34bf2170 | 5168 | } |
633273a3 TH |
5169 | |
5170 | return sata_pmp_scr_write(link, reg, val); | |
34bf2170 TH |
5171 | } |
5172 | ||
5173 | /** | |
b1c72916 | 5174 | * ata_phys_link_online - test whether the given link is online |
936fd732 | 5175 | * @link: ATA link to test |
34bf2170 | 5176 | * |
936fd732 TH |
5177 | * Test whether @link is online. Note that this function returns |
5178 | * 0 if online status of @link cannot be obtained, so | |
5179 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
5180 | * |
5181 | * LOCKING: | |
5182 | * None. | |
5183 | * | |
5184 | * RETURNS: | |
b5b3fa38 | 5185 | * True if the port online status is available and online. |
34bf2170 | 5186 | */ |
b1c72916 | 5187 | bool ata_phys_link_online(struct ata_link *link) |
34bf2170 TH |
5188 | { |
5189 | u32 sstatus; | |
5190 | ||
936fd732 | 5191 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
9913ff8a | 5192 | ata_sstatus_online(sstatus)) |
b5b3fa38 TH |
5193 | return true; |
5194 | return false; | |
34bf2170 TH |
5195 | } |
5196 | ||
5197 | /** | |
b1c72916 | 5198 | * ata_phys_link_offline - test whether the given link is offline |
936fd732 | 5199 | * @link: ATA link to test |
34bf2170 | 5200 | * |
936fd732 TH |
5201 | * Test whether @link is offline. Note that this function |
5202 | * returns 0 if offline status of @link cannot be obtained, so | |
5203 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
5204 | * |
5205 | * LOCKING: | |
5206 | * None. | |
5207 | * | |
5208 | * RETURNS: | |
b5b3fa38 | 5209 | * True if the port offline status is available and offline. |
34bf2170 | 5210 | */ |
b1c72916 | 5211 | bool ata_phys_link_offline(struct ata_link *link) |
34bf2170 TH |
5212 | { |
5213 | u32 sstatus; | |
5214 | ||
936fd732 | 5215 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
9913ff8a | 5216 | !ata_sstatus_online(sstatus)) |
b5b3fa38 TH |
5217 | return true; |
5218 | return false; | |
34bf2170 | 5219 | } |
0baab86b | 5220 | |
b1c72916 TH |
5221 | /** |
5222 | * ata_link_online - test whether the given link is online | |
5223 | * @link: ATA link to test | |
5224 | * | |
5225 | * Test whether @link is online. This is identical to | |
5226 | * ata_phys_link_online() when there's no slave link. When | |
5227 | * there's a slave link, this function should only be called on | |
5228 | * the master link and will return true if any of M/S links is | |
5229 | * online. | |
5230 | * | |
5231 | * LOCKING: | |
5232 | * None. | |
5233 | * | |
5234 | * RETURNS: | |
5235 | * True if the port online status is available and online. | |
5236 | */ | |
5237 | bool ata_link_online(struct ata_link *link) | |
5238 | { | |
5239 | struct ata_link *slave = link->ap->slave_link; | |
5240 | ||
5241 | WARN_ON(link == slave); /* shouldn't be called on slave link */ | |
5242 | ||
5243 | return ata_phys_link_online(link) || | |
5244 | (slave && ata_phys_link_online(slave)); | |
5245 | } | |
5246 | ||
5247 | /** | |
5248 | * ata_link_offline - test whether the given link is offline | |
5249 | * @link: ATA link to test | |
5250 | * | |
5251 | * Test whether @link is offline. This is identical to | |
5252 | * ata_phys_link_offline() when there's no slave link. When | |
5253 | * there's a slave link, this function should only be called on | |
5254 | * the master link and will return true if both M/S links are | |
5255 | * offline. | |
5256 | * | |
5257 | * LOCKING: | |
5258 | * None. | |
5259 | * | |
5260 | * RETURNS: | |
5261 | * True if the port offline status is available and offline. | |
5262 | */ | |
5263 | bool ata_link_offline(struct ata_link *link) | |
5264 | { | |
5265 | struct ata_link *slave = link->ap->slave_link; | |
5266 | ||
5267 | WARN_ON(link == slave); /* shouldn't be called on slave link */ | |
5268 | ||
5269 | return ata_phys_link_offline(link) && | |
5270 | (!slave || ata_phys_link_offline(slave)); | |
5271 | } | |
5272 | ||
6ffa01d8 | 5273 | #ifdef CONFIG_PM |
bc6e7c4b DW |
5274 | static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg, |
5275 | unsigned int action, unsigned int ehi_flags, | |
5276 | bool async) | |
500530f6 | 5277 | { |
5ef41082 | 5278 | struct ata_link *link; |
500530f6 | 5279 | unsigned long flags; |
500530f6 | 5280 | |
5ef41082 LM |
5281 | /* Previous resume operation might still be in |
5282 | * progress. Wait for PM_PENDING to clear. | |
5283 | */ | |
5284 | if (ap->pflags & ATA_PFLAG_PM_PENDING) { | |
5285 | ata_port_wait_eh(ap); | |
5286 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
5287 | } | |
500530f6 | 5288 | |
5ef41082 LM |
5289 | /* request PM ops to EH */ |
5290 | spin_lock_irqsave(ap->lock, flags); | |
500530f6 | 5291 | |
5ef41082 | 5292 | ap->pm_mesg = mesg; |
5ef41082 LM |
5293 | ap->pflags |= ATA_PFLAG_PM_PENDING; |
5294 | ata_for_each_link(link, ap, HOST_FIRST) { | |
5295 | link->eh_info.action |= action; | |
5296 | link->eh_info.flags |= ehi_flags; | |
5297 | } | |
500530f6 | 5298 | |
5ef41082 | 5299 | ata_port_schedule_eh(ap); |
500530f6 | 5300 | |
5ef41082 | 5301 | spin_unlock_irqrestore(ap->lock, flags); |
500530f6 | 5302 | |
2fcbdcb4 | 5303 | if (!async) { |
5ef41082 LM |
5304 | ata_port_wait_eh(ap); |
5305 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
500530f6 | 5306 | } |
500530f6 TH |
5307 | } |
5308 | ||
bc6e7c4b DW |
5309 | /* |
5310 | * On some hardware, device fails to respond after spun down for suspend. As | |
5311 | * the device won't be used before being resumed, we don't need to touch the | |
5312 | * device. Ask EH to skip the usual stuff and proceed directly to suspend. | |
5313 | * | |
5314 | * http://thread.gmane.org/gmane.linux.ide/46764 | |
5315 | */ | |
5316 | static const unsigned int ata_port_suspend_ehi = ATA_EHI_QUIET | |
5317 | | ATA_EHI_NO_AUTOPSY | |
5318 | | ATA_EHI_NO_RECOVERY; | |
5319 | ||
5320 | static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg) | |
5ef41082 | 5321 | { |
bc6e7c4b | 5322 | ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, false); |
5ef41082 LM |
5323 | } |
5324 | ||
bc6e7c4b | 5325 | static void ata_port_suspend_async(struct ata_port *ap, pm_message_t mesg) |
2fcbdcb4 | 5326 | { |
bc6e7c4b | 5327 | ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, true); |
2fcbdcb4 DW |
5328 | } |
5329 | ||
bc6e7c4b | 5330 | static int ata_port_pm_suspend(struct device *dev) |
5ef41082 | 5331 | { |
bc6e7c4b DW |
5332 | struct ata_port *ap = to_ata_port(dev); |
5333 | ||
5ef41082 LM |
5334 | if (pm_runtime_suspended(dev)) |
5335 | return 0; | |
5336 | ||
bc6e7c4b DW |
5337 | ata_port_suspend(ap, PMSG_SUSPEND); |
5338 | return 0; | |
33574d68 LM |
5339 | } |
5340 | ||
bc6e7c4b | 5341 | static int ata_port_pm_freeze(struct device *dev) |
33574d68 | 5342 | { |
bc6e7c4b DW |
5343 | struct ata_port *ap = to_ata_port(dev); |
5344 | ||
33574d68 | 5345 | if (pm_runtime_suspended(dev)) |
f5e6d0d0 | 5346 | return 0; |
33574d68 | 5347 | |
bc6e7c4b DW |
5348 | ata_port_suspend(ap, PMSG_FREEZE); |
5349 | return 0; | |
33574d68 LM |
5350 | } |
5351 | ||
bc6e7c4b | 5352 | static int ata_port_pm_poweroff(struct device *dev) |
33574d68 | 5353 | { |
bc6e7c4b DW |
5354 | ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE); |
5355 | return 0; | |
5ef41082 LM |
5356 | } |
5357 | ||
bc6e7c4b DW |
5358 | static const unsigned int ata_port_resume_ehi = ATA_EHI_NO_AUTOPSY |
5359 | | ATA_EHI_QUIET; | |
5ef41082 | 5360 | |
bc6e7c4b DW |
5361 | static void ata_port_resume(struct ata_port *ap, pm_message_t mesg) |
5362 | { | |
5363 | ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, false); | |
5ef41082 LM |
5364 | } |
5365 | ||
bc6e7c4b | 5366 | static void ata_port_resume_async(struct ata_port *ap, pm_message_t mesg) |
2fcbdcb4 | 5367 | { |
bc6e7c4b | 5368 | ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, true); |
2fcbdcb4 DW |
5369 | } |
5370 | ||
bc6e7c4b | 5371 | static int ata_port_pm_resume(struct device *dev) |
e90b1e5a | 5372 | { |
200421a8 | 5373 | ata_port_resume_async(to_ata_port(dev), PMSG_RESUME); |
bc6e7c4b DW |
5374 | pm_runtime_disable(dev); |
5375 | pm_runtime_set_active(dev); | |
5376 | pm_runtime_enable(dev); | |
5377 | return 0; | |
e90b1e5a LM |
5378 | } |
5379 | ||
7e15e9be AL |
5380 | /* |
5381 | * For ODDs, the upper layer will poll for media change every few seconds, | |
5382 | * which will make it enter and leave suspend state every few seconds. And | |
5383 | * as each suspend will cause a hard/soft reset, the gain of runtime suspend | |
5384 | * is very little and the ODD may malfunction after constantly being reset. | |
5385 | * So the idle callback here will not proceed to suspend if a non-ZPODD capable | |
5386 | * ODD is attached to the port. | |
5387 | */ | |
9ee4f393 LM |
5388 | static int ata_port_runtime_idle(struct device *dev) |
5389 | { | |
7e15e9be AL |
5390 | struct ata_port *ap = to_ata_port(dev); |
5391 | struct ata_link *link; | |
5392 | struct ata_device *adev; | |
5393 | ||
5394 | ata_for_each_link(link, ap, HOST_FIRST) { | |
5395 | ata_for_each_dev(adev, link, ENABLED) | |
5396 | if (adev->class == ATA_DEV_ATAPI && | |
5397 | !zpodd_dev_enabled(adev)) | |
5398 | return -EBUSY; | |
5399 | } | |
5400 | ||
45f0a85c | 5401 | return 0; |
9ee4f393 LM |
5402 | } |
5403 | ||
a7ff60db AL |
5404 | static int ata_port_runtime_suspend(struct device *dev) |
5405 | { | |
bc6e7c4b DW |
5406 | ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND); |
5407 | return 0; | |
a7ff60db AL |
5408 | } |
5409 | ||
5410 | static int ata_port_runtime_resume(struct device *dev) | |
5411 | { | |
bc6e7c4b DW |
5412 | ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME); |
5413 | return 0; | |
a7ff60db AL |
5414 | } |
5415 | ||
5ef41082 | 5416 | static const struct dev_pm_ops ata_port_pm_ops = { |
bc6e7c4b DW |
5417 | .suspend = ata_port_pm_suspend, |
5418 | .resume = ata_port_pm_resume, | |
5419 | .freeze = ata_port_pm_freeze, | |
5420 | .thaw = ata_port_pm_resume, | |
5421 | .poweroff = ata_port_pm_poweroff, | |
5422 | .restore = ata_port_pm_resume, | |
9ee4f393 | 5423 | |
a7ff60db AL |
5424 | .runtime_suspend = ata_port_runtime_suspend, |
5425 | .runtime_resume = ata_port_runtime_resume, | |
9ee4f393 | 5426 | .runtime_idle = ata_port_runtime_idle, |
5ef41082 LM |
5427 | }; |
5428 | ||
2fcbdcb4 DW |
5429 | /* sas ports don't participate in pm runtime management of ata_ports, |
5430 | * and need to resume ata devices at the domain level, not the per-port | |
5431 | * level. sas suspend/resume is async to allow parallel port recovery | |
5432 | * since sas has multiple ata_port instances per Scsi_Host. | |
5433 | */ | |
bc6e7c4b | 5434 | void ata_sas_port_suspend(struct ata_port *ap) |
2fcbdcb4 | 5435 | { |
bc6e7c4b | 5436 | ata_port_suspend_async(ap, PMSG_SUSPEND); |
2fcbdcb4 | 5437 | } |
bc6e7c4b | 5438 | EXPORT_SYMBOL_GPL(ata_sas_port_suspend); |
2fcbdcb4 | 5439 | |
bc6e7c4b | 5440 | void ata_sas_port_resume(struct ata_port *ap) |
2fcbdcb4 | 5441 | { |
bc6e7c4b | 5442 | ata_port_resume_async(ap, PMSG_RESUME); |
2fcbdcb4 | 5443 | } |
bc6e7c4b | 5444 | EXPORT_SYMBOL_GPL(ata_sas_port_resume); |
2fcbdcb4 | 5445 | |
500530f6 | 5446 | /** |
cca3974e JG |
5447 | * ata_host_suspend - suspend host |
5448 | * @host: host to suspend | |
500530f6 TH |
5449 | * @mesg: PM message |
5450 | * | |
5ef41082 | 5451 | * Suspend @host. Actual operation is performed by port suspend. |
500530f6 | 5452 | */ |
cca3974e | 5453 | int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
500530f6 | 5454 | { |
5ef41082 LM |
5455 | host->dev->power.power_state = mesg; |
5456 | return 0; | |
500530f6 TH |
5457 | } |
5458 | ||
5459 | /** | |
cca3974e JG |
5460 | * ata_host_resume - resume host |
5461 | * @host: host to resume | |
500530f6 | 5462 | * |
5ef41082 | 5463 | * Resume @host. Actual operation is performed by port resume. |
500530f6 | 5464 | */ |
cca3974e | 5465 | void ata_host_resume(struct ata_host *host) |
500530f6 | 5466 | { |
72ad6ec4 | 5467 | host->dev->power.power_state = PMSG_ON; |
500530f6 | 5468 | } |
6ffa01d8 | 5469 | #endif |
500530f6 | 5470 | |
5ef41082 LM |
5471 | struct device_type ata_port_type = { |
5472 | .name = "ata_port", | |
5473 | #ifdef CONFIG_PM | |
5474 | .pm = &ata_port_pm_ops, | |
5475 | #endif | |
5476 | }; | |
5477 | ||
3ef3b43d TH |
5478 | /** |
5479 | * ata_dev_init - Initialize an ata_device structure | |
5480 | * @dev: Device structure to initialize | |
5481 | * | |
5482 | * Initialize @dev in preparation for probing. | |
5483 | * | |
5484 | * LOCKING: | |
5485 | * Inherited from caller. | |
5486 | */ | |
5487 | void ata_dev_init(struct ata_device *dev) | |
5488 | { | |
b1c72916 | 5489 | struct ata_link *link = ata_dev_phys_link(dev); |
9af5c9c9 | 5490 | struct ata_port *ap = link->ap; |
72fa4b74 TH |
5491 | unsigned long flags; |
5492 | ||
b1c72916 | 5493 | /* SATA spd limit is bound to the attached device, reset together */ |
9af5c9c9 TH |
5494 | link->sata_spd_limit = link->hw_sata_spd_limit; |
5495 | link->sata_spd = 0; | |
5a04bf4b | 5496 | |
72fa4b74 TH |
5497 | /* High bits of dev->flags are used to record warm plug |
5498 | * requests which occur asynchronously. Synchronize using | |
cca3974e | 5499 | * host lock. |
72fa4b74 | 5500 | */ |
ba6a1308 | 5501 | spin_lock_irqsave(ap->lock, flags); |
72fa4b74 | 5502 | dev->flags &= ~ATA_DFLAG_INIT_MASK; |
3dcc323f | 5503 | dev->horkage = 0; |
ba6a1308 | 5504 | spin_unlock_irqrestore(ap->lock, flags); |
3ef3b43d | 5505 | |
99cf610a TH |
5506 | memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0, |
5507 | ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN); | |
3ef3b43d TH |
5508 | dev->pio_mask = UINT_MAX; |
5509 | dev->mwdma_mask = UINT_MAX; | |
5510 | dev->udma_mask = UINT_MAX; | |
5511 | } | |
5512 | ||
4fb37a25 TH |
5513 | /** |
5514 | * ata_link_init - Initialize an ata_link structure | |
5515 | * @ap: ATA port link is attached to | |
5516 | * @link: Link structure to initialize | |
8989805d | 5517 | * @pmp: Port multiplier port number |
4fb37a25 TH |
5518 | * |
5519 | * Initialize @link. | |
5520 | * | |
5521 | * LOCKING: | |
5522 | * Kernel thread context (may sleep) | |
5523 | */ | |
fb7fd614 | 5524 | void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) |
4fb37a25 TH |
5525 | { |
5526 | int i; | |
5527 | ||
5528 | /* clear everything except for devices */ | |
d9027470 GG |
5529 | memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0, |
5530 | ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN); | |
4fb37a25 TH |
5531 | |
5532 | link->ap = ap; | |
8989805d | 5533 | link->pmp = pmp; |
4fb37a25 TH |
5534 | link->active_tag = ATA_TAG_POISON; |
5535 | link->hw_sata_spd_limit = UINT_MAX; | |
5536 | ||
5537 | /* can't use iterator, ap isn't initialized yet */ | |
5538 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
5539 | struct ata_device *dev = &link->device[i]; | |
5540 | ||
5541 | dev->link = link; | |
5542 | dev->devno = dev - link->device; | |
110f66d2 TH |
5543 | #ifdef CONFIG_ATA_ACPI |
5544 | dev->gtf_filter = ata_acpi_gtf_filter; | |
5545 | #endif | |
4fb37a25 TH |
5546 | ata_dev_init(dev); |
5547 | } | |
5548 | } | |
5549 | ||
5550 | /** | |
5551 | * sata_link_init_spd - Initialize link->sata_spd_limit | |
5552 | * @link: Link to configure sata_spd_limit for | |
5553 | * | |
5554 | * Initialize @link->[hw_]sata_spd_limit to the currently | |
5555 | * configured value. | |
5556 | * | |
5557 | * LOCKING: | |
5558 | * Kernel thread context (may sleep). | |
5559 | * | |
5560 | * RETURNS: | |
5561 | * 0 on success, -errno on failure. | |
5562 | */ | |
fb7fd614 | 5563 | int sata_link_init_spd(struct ata_link *link) |
4fb37a25 | 5564 | { |
33267325 | 5565 | u8 spd; |
4fb37a25 TH |
5566 | int rc; |
5567 | ||
d127ea7b | 5568 | rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol); |
4fb37a25 TH |
5569 | if (rc) |
5570 | return rc; | |
5571 | ||
d127ea7b | 5572 | spd = (link->saved_scontrol >> 4) & 0xf; |
4fb37a25 TH |
5573 | if (spd) |
5574 | link->hw_sata_spd_limit &= (1 << spd) - 1; | |
5575 | ||
05944bdf | 5576 | ata_force_link_limits(link); |
33267325 | 5577 | |
4fb37a25 TH |
5578 | link->sata_spd_limit = link->hw_sata_spd_limit; |
5579 | ||
5580 | return 0; | |
5581 | } | |
5582 | ||
1da177e4 | 5583 | /** |
f3187195 TH |
5584 | * ata_port_alloc - allocate and initialize basic ATA port resources |
5585 | * @host: ATA host this allocated port belongs to | |
1da177e4 | 5586 | * |
f3187195 TH |
5587 | * Allocate and initialize basic ATA port resources. |
5588 | * | |
5589 | * RETURNS: | |
5590 | * Allocate ATA port on success, NULL on failure. | |
0cba632b | 5591 | * |
1da177e4 | 5592 | * LOCKING: |
f3187195 | 5593 | * Inherited from calling layer (may sleep). |
1da177e4 | 5594 | */ |
f3187195 | 5595 | struct ata_port *ata_port_alloc(struct ata_host *host) |
1da177e4 | 5596 | { |
f3187195 | 5597 | struct ata_port *ap; |
1da177e4 | 5598 | |
f3187195 TH |
5599 | DPRINTK("ENTER\n"); |
5600 | ||
5601 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); | |
5602 | if (!ap) | |
5603 | return NULL; | |
4fca377f | 5604 | |
7b3a24c5 | 5605 | ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN; |
cca3974e | 5606 | ap->lock = &host->lock; |
f3187195 | 5607 | ap->print_id = -1; |
e628dc99 | 5608 | ap->local_port_no = -1; |
cca3974e | 5609 | ap->host = host; |
f3187195 | 5610 | ap->dev = host->dev; |
bd5d825c BP |
5611 | |
5612 | #if defined(ATA_VERBOSE_DEBUG) | |
5613 | /* turn on all debugging levels */ | |
5614 | ap->msg_enable = 0x00FF; | |
5615 | #elif defined(ATA_DEBUG) | |
5616 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; | |
88574551 | 5617 | #else |
0dd4b21f | 5618 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
bd5d825c | 5619 | #endif |
1da177e4 | 5620 | |
ad72cf98 | 5621 | mutex_init(&ap->scsi_scan_mutex); |
65f27f38 DH |
5622 | INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); |
5623 | INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); | |
a72ec4ce | 5624 | INIT_LIST_HEAD(&ap->eh_done_q); |
c6cf9e99 | 5625 | init_waitqueue_head(&ap->eh_wait_q); |
45fabbb7 | 5626 | init_completion(&ap->park_req_pending); |
5ddf24c5 TH |
5627 | init_timer_deferrable(&ap->fastdrain_timer); |
5628 | ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; | |
5629 | ap->fastdrain_timer.data = (unsigned long)ap; | |
1da177e4 | 5630 | |
838df628 | 5631 | ap->cbl = ATA_CBL_NONE; |
838df628 | 5632 | |
8989805d | 5633 | ata_link_init(ap, &ap->link, 0); |
1da177e4 LT |
5634 | |
5635 | #ifdef ATA_IRQ_TRAP | |
5636 | ap->stats.unhandled_irq = 1; | |
5637 | ap->stats.idle_irq = 1; | |
5638 | #endif | |
270390e1 TH |
5639 | ata_sff_port_init(ap); |
5640 | ||
1da177e4 | 5641 | return ap; |
1da177e4 LT |
5642 | } |
5643 | ||
f0d36efd TH |
5644 | static void ata_host_release(struct device *gendev, void *res) |
5645 | { | |
5646 | struct ata_host *host = dev_get_drvdata(gendev); | |
5647 | int i; | |
5648 | ||
1aa506e4 TH |
5649 | for (i = 0; i < host->n_ports; i++) { |
5650 | struct ata_port *ap = host->ports[i]; | |
5651 | ||
4911487a TH |
5652 | if (!ap) |
5653 | continue; | |
5654 | ||
5655 | if (ap->scsi_host) | |
1aa506e4 TH |
5656 | scsi_host_put(ap->scsi_host); |
5657 | ||
633273a3 | 5658 | kfree(ap->pmp_link); |
b1c72916 | 5659 | kfree(ap->slave_link); |
4911487a | 5660 | kfree(ap); |
1aa506e4 TH |
5661 | host->ports[i] = NULL; |
5662 | } | |
5663 | ||
1aa56cca | 5664 | dev_set_drvdata(gendev, NULL); |
f0d36efd TH |
5665 | } |
5666 | ||
f3187195 TH |
5667 | /** |
5668 | * ata_host_alloc - allocate and init basic ATA host resources | |
5669 | * @dev: generic device this host is associated with | |
5670 | * @max_ports: maximum number of ATA ports associated with this host | |
5671 | * | |
5672 | * Allocate and initialize basic ATA host resources. LLD calls | |
5673 | * this function to allocate a host, initializes it fully and | |
5674 | * attaches it using ata_host_register(). | |
5675 | * | |
5676 | * @max_ports ports are allocated and host->n_ports is | |
5677 | * initialized to @max_ports. The caller is allowed to decrease | |
5678 | * host->n_ports before calling ata_host_register(). The unused | |
5679 | * ports will be automatically freed on registration. | |
5680 | * | |
5681 | * RETURNS: | |
5682 | * Allocate ATA host on success, NULL on failure. | |
5683 | * | |
5684 | * LOCKING: | |
5685 | * Inherited from calling layer (may sleep). | |
5686 | */ | |
5687 | struct ata_host *ata_host_alloc(struct device *dev, int max_ports) | |
5688 | { | |
5689 | struct ata_host *host; | |
5690 | size_t sz; | |
5691 | int i; | |
5692 | ||
5693 | DPRINTK("ENTER\n"); | |
5694 | ||
5695 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) | |
5696 | return NULL; | |
5697 | ||
5698 | /* alloc a container for our list of ATA ports (buses) */ | |
5699 | sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); | |
5700 | /* alloc a container for our list of ATA ports (buses) */ | |
5701 | host = devres_alloc(ata_host_release, sz, GFP_KERNEL); | |
5702 | if (!host) | |
5703 | goto err_out; | |
5704 | ||
5705 | devres_add(dev, host); | |
5706 | dev_set_drvdata(dev, host); | |
5707 | ||
5708 | spin_lock_init(&host->lock); | |
c0c362b6 | 5709 | mutex_init(&host->eh_mutex); |
f3187195 TH |
5710 | host->dev = dev; |
5711 | host->n_ports = max_ports; | |
5712 | ||
5713 | /* allocate ports bound to this host */ | |
5714 | for (i = 0; i < max_ports; i++) { | |
5715 | struct ata_port *ap; | |
5716 | ||
5717 | ap = ata_port_alloc(host); | |
5718 | if (!ap) | |
5719 | goto err_out; | |
5720 | ||
5721 | ap->port_no = i; | |
5722 | host->ports[i] = ap; | |
5723 | } | |
5724 | ||
5725 | devres_remove_group(dev, NULL); | |
5726 | return host; | |
5727 | ||
5728 | err_out: | |
5729 | devres_release_group(dev, NULL); | |
5730 | return NULL; | |
5731 | } | |
5732 | ||
f5cda257 TH |
5733 | /** |
5734 | * ata_host_alloc_pinfo - alloc host and init with port_info array | |
5735 | * @dev: generic device this host is associated with | |
5736 | * @ppi: array of ATA port_info to initialize host with | |
5737 | * @n_ports: number of ATA ports attached to this host | |
5738 | * | |
5739 | * Allocate ATA host and initialize with info from @ppi. If NULL | |
5740 | * terminated, @ppi may contain fewer entries than @n_ports. The | |
5741 | * last entry will be used for the remaining ports. | |
5742 | * | |
5743 | * RETURNS: | |
5744 | * Allocate ATA host on success, NULL on failure. | |
5745 | * | |
5746 | * LOCKING: | |
5747 | * Inherited from calling layer (may sleep). | |
5748 | */ | |
5749 | struct ata_host *ata_host_alloc_pinfo(struct device *dev, | |
5750 | const struct ata_port_info * const * ppi, | |
5751 | int n_ports) | |
5752 | { | |
5753 | const struct ata_port_info *pi; | |
5754 | struct ata_host *host; | |
5755 | int i, j; | |
5756 | ||
5757 | host = ata_host_alloc(dev, n_ports); | |
5758 | if (!host) | |
5759 | return NULL; | |
5760 | ||
5761 | for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { | |
5762 | struct ata_port *ap = host->ports[i]; | |
5763 | ||
5764 | if (ppi[j]) | |
5765 | pi = ppi[j++]; | |
5766 | ||
5767 | ap->pio_mask = pi->pio_mask; | |
5768 | ap->mwdma_mask = pi->mwdma_mask; | |
5769 | ap->udma_mask = pi->udma_mask; | |
5770 | ap->flags |= pi->flags; | |
0c88758b | 5771 | ap->link.flags |= pi->link_flags; |
f5cda257 TH |
5772 | ap->ops = pi->port_ops; |
5773 | ||
5774 | if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) | |
5775 | host->ops = pi->port_ops; | |
f5cda257 TH |
5776 | } |
5777 | ||
5778 | return host; | |
5779 | } | |
5780 | ||
b1c72916 TH |
5781 | /** |
5782 | * ata_slave_link_init - initialize slave link | |
5783 | * @ap: port to initialize slave link for | |
5784 | * | |
5785 | * Create and initialize slave link for @ap. This enables slave | |
5786 | * link handling on the port. | |
5787 | * | |
5788 | * In libata, a port contains links and a link contains devices. | |
5789 | * There is single host link but if a PMP is attached to it, | |
5790 | * there can be multiple fan-out links. On SATA, there's usually | |
5791 | * a single device connected to a link but PATA and SATA | |
5792 | * controllers emulating TF based interface can have two - master | |
5793 | * and slave. | |
5794 | * | |
5795 | * However, there are a few controllers which don't fit into this | |
5796 | * abstraction too well - SATA controllers which emulate TF | |
5797 | * interface with both master and slave devices but also have | |
5798 | * separate SCR register sets for each device. These controllers | |
5799 | * need separate links for physical link handling | |
5800 | * (e.g. onlineness, link speed) but should be treated like a | |
5801 | * traditional M/S controller for everything else (e.g. command | |
5802 | * issue, softreset). | |
5803 | * | |
5804 | * slave_link is libata's way of handling this class of | |
5805 | * controllers without impacting core layer too much. For | |
5806 | * anything other than physical link handling, the default host | |
5807 | * link is used for both master and slave. For physical link | |
5808 | * handling, separate @ap->slave_link is used. All dirty details | |
5809 | * are implemented inside libata core layer. From LLD's POV, the | |
5810 | * only difference is that prereset, hardreset and postreset are | |
5811 | * called once more for the slave link, so the reset sequence | |
5812 | * looks like the following. | |
5813 | * | |
5814 | * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) -> | |
5815 | * softreset(M) -> postreset(M) -> postreset(S) | |
5816 | * | |
5817 | * Note that softreset is called only for the master. Softreset | |
5818 | * resets both M/S by definition, so SRST on master should handle | |
5819 | * both (the standard method will work just fine). | |
5820 | * | |
5821 | * LOCKING: | |
5822 | * Should be called before host is registered. | |
5823 | * | |
5824 | * RETURNS: | |
5825 | * 0 on success, -errno on failure. | |
5826 | */ | |
5827 | int ata_slave_link_init(struct ata_port *ap) | |
5828 | { | |
5829 | struct ata_link *link; | |
5830 | ||
5831 | WARN_ON(ap->slave_link); | |
5832 | WARN_ON(ap->flags & ATA_FLAG_PMP); | |
5833 | ||
5834 | link = kzalloc(sizeof(*link), GFP_KERNEL); | |
5835 | if (!link) | |
5836 | return -ENOMEM; | |
5837 | ||
5838 | ata_link_init(ap, link, 1); | |
5839 | ap->slave_link = link; | |
5840 | return 0; | |
5841 | } | |
5842 | ||
32ebbc0c TH |
5843 | static void ata_host_stop(struct device *gendev, void *res) |
5844 | { | |
5845 | struct ata_host *host = dev_get_drvdata(gendev); | |
5846 | int i; | |
5847 | ||
5848 | WARN_ON(!(host->flags & ATA_HOST_STARTED)); | |
5849 | ||
5850 | for (i = 0; i < host->n_ports; i++) { | |
5851 | struct ata_port *ap = host->ports[i]; | |
5852 | ||
5853 | if (ap->ops->port_stop) | |
5854 | ap->ops->port_stop(ap); | |
5855 | } | |
5856 | ||
5857 | if (host->ops->host_stop) | |
5858 | host->ops->host_stop(host); | |
5859 | } | |
5860 | ||
029cfd6b TH |
5861 | /** |
5862 | * ata_finalize_port_ops - finalize ata_port_operations | |
5863 | * @ops: ata_port_operations to finalize | |
5864 | * | |
5865 | * An ata_port_operations can inherit from another ops and that | |
5866 | * ops can again inherit from another. This can go on as many | |
5867 | * times as necessary as long as there is no loop in the | |
5868 | * inheritance chain. | |
5869 | * | |
5870 | * Ops tables are finalized when the host is started. NULL or | |
5871 | * unspecified entries are inherited from the closet ancestor | |
5872 | * which has the method and the entry is populated with it. | |
5873 | * After finalization, the ops table directly points to all the | |
5874 | * methods and ->inherits is no longer necessary and cleared. | |
5875 | * | |
5876 | * Using ATA_OP_NULL, inheriting ops can force a method to NULL. | |
5877 | * | |
5878 | * LOCKING: | |
5879 | * None. | |
5880 | */ | |
5881 | static void ata_finalize_port_ops(struct ata_port_operations *ops) | |
5882 | { | |
2da67659 | 5883 | static DEFINE_SPINLOCK(lock); |
029cfd6b TH |
5884 | const struct ata_port_operations *cur; |
5885 | void **begin = (void **)ops; | |
5886 | void **end = (void **)&ops->inherits; | |
5887 | void **pp; | |
5888 | ||
5889 | if (!ops || !ops->inherits) | |
5890 | return; | |
5891 | ||
5892 | spin_lock(&lock); | |
5893 | ||
5894 | for (cur = ops->inherits; cur; cur = cur->inherits) { | |
5895 | void **inherit = (void **)cur; | |
5896 | ||
5897 | for (pp = begin; pp < end; pp++, inherit++) | |
5898 | if (!*pp) | |
5899 | *pp = *inherit; | |
5900 | } | |
5901 | ||
5902 | for (pp = begin; pp < end; pp++) | |
5903 | if (IS_ERR(*pp)) | |
5904 | *pp = NULL; | |
5905 | ||
5906 | ops->inherits = NULL; | |
5907 | ||
5908 | spin_unlock(&lock); | |
5909 | } | |
5910 | ||
ecef7253 TH |
5911 | /** |
5912 | * ata_host_start - start and freeze ports of an ATA host | |
5913 | * @host: ATA host to start ports for | |
5914 | * | |
5915 | * Start and then freeze ports of @host. Started status is | |
5916 | * recorded in host->flags, so this function can be called | |
5917 | * multiple times. Ports are guaranteed to get started only | |
f3187195 TH |
5918 | * once. If host->ops isn't initialized yet, its set to the |
5919 | * first non-dummy port ops. | |
ecef7253 TH |
5920 | * |
5921 | * LOCKING: | |
5922 | * Inherited from calling layer (may sleep). | |
5923 | * | |
5924 | * RETURNS: | |
5925 | * 0 if all ports are started successfully, -errno otherwise. | |
5926 | */ | |
5927 | int ata_host_start(struct ata_host *host) | |
5928 | { | |
32ebbc0c TH |
5929 | int have_stop = 0; |
5930 | void *start_dr = NULL; | |
ecef7253 TH |
5931 | int i, rc; |
5932 | ||
5933 | if (host->flags & ATA_HOST_STARTED) | |
5934 | return 0; | |
5935 | ||
029cfd6b TH |
5936 | ata_finalize_port_ops(host->ops); |
5937 | ||
ecef7253 TH |
5938 | for (i = 0; i < host->n_ports; i++) { |
5939 | struct ata_port *ap = host->ports[i]; | |
5940 | ||
029cfd6b TH |
5941 | ata_finalize_port_ops(ap->ops); |
5942 | ||
f3187195 TH |
5943 | if (!host->ops && !ata_port_is_dummy(ap)) |
5944 | host->ops = ap->ops; | |
5945 | ||
32ebbc0c TH |
5946 | if (ap->ops->port_stop) |
5947 | have_stop = 1; | |
5948 | } | |
5949 | ||
5950 | if (host->ops->host_stop) | |
5951 | have_stop = 1; | |
5952 | ||
5953 | if (have_stop) { | |
5954 | start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); | |
5955 | if (!start_dr) | |
5956 | return -ENOMEM; | |
5957 | } | |
5958 | ||
5959 | for (i = 0; i < host->n_ports; i++) { | |
5960 | struct ata_port *ap = host->ports[i]; | |
5961 | ||
ecef7253 TH |
5962 | if (ap->ops->port_start) { |
5963 | rc = ap->ops->port_start(ap); | |
5964 | if (rc) { | |
0f9fe9b7 | 5965 | if (rc != -ENODEV) |
a44fec1f JP |
5966 | dev_err(host->dev, |
5967 | "failed to start port %d (errno=%d)\n", | |
5968 | i, rc); | |
ecef7253 TH |
5969 | goto err_out; |
5970 | } | |
5971 | } | |
ecef7253 TH |
5972 | ata_eh_freeze_port(ap); |
5973 | } | |
5974 | ||
32ebbc0c TH |
5975 | if (start_dr) |
5976 | devres_add(host->dev, start_dr); | |
ecef7253 TH |
5977 | host->flags |= ATA_HOST_STARTED; |
5978 | return 0; | |
5979 | ||
5980 | err_out: | |
5981 | while (--i >= 0) { | |
5982 | struct ata_port *ap = host->ports[i]; | |
5983 | ||
5984 | if (ap->ops->port_stop) | |
5985 | ap->ops->port_stop(ap); | |
5986 | } | |
32ebbc0c | 5987 | devres_free(start_dr); |
ecef7253 TH |
5988 | return rc; |
5989 | } | |
5990 | ||
b03732f0 | 5991 | /** |
8d8e7d13 | 5992 | * ata_sas_host_init - Initialize a host struct for sas (ipr, libsas) |
cca3974e JG |
5993 | * @host: host to initialize |
5994 | * @dev: device host is attached to | |
cca3974e | 5995 | * @ops: port_ops |
b03732f0 | 5996 | * |
b03732f0 | 5997 | */ |
cca3974e | 5998 | void ata_host_init(struct ata_host *host, struct device *dev, |
8d8e7d13 | 5999 | struct ata_port_operations *ops) |
b03732f0 | 6000 | { |
cca3974e | 6001 | spin_lock_init(&host->lock); |
c0c362b6 | 6002 | mutex_init(&host->eh_mutex); |
1a112d10 | 6003 | host->n_tags = ATA_MAX_QUEUE - 1; |
cca3974e | 6004 | host->dev = dev; |
cca3974e | 6005 | host->ops = ops; |
b03732f0 BK |
6006 | } |
6007 | ||
9508a66f | 6008 | void __ata_port_probe(struct ata_port *ap) |
79318057 | 6009 | { |
9508a66f DW |
6010 | struct ata_eh_info *ehi = &ap->link.eh_info; |
6011 | unsigned long flags; | |
886ad09f | 6012 | |
9508a66f DW |
6013 | /* kick EH for boot probing */ |
6014 | spin_lock_irqsave(ap->lock, flags); | |
79318057 | 6015 | |
9508a66f DW |
6016 | ehi->probe_mask |= ATA_ALL_DEVICES; |
6017 | ehi->action |= ATA_EH_RESET; | |
6018 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; | |
79318057 | 6019 | |
9508a66f DW |
6020 | ap->pflags &= ~ATA_PFLAG_INITIALIZING; |
6021 | ap->pflags |= ATA_PFLAG_LOADING; | |
6022 | ata_port_schedule_eh(ap); | |
79318057 | 6023 | |
9508a66f DW |
6024 | spin_unlock_irqrestore(ap->lock, flags); |
6025 | } | |
79318057 | 6026 | |
9508a66f DW |
6027 | int ata_port_probe(struct ata_port *ap) |
6028 | { | |
6029 | int rc = 0; | |
79318057 | 6030 | |
9508a66f DW |
6031 | if (ap->ops->error_handler) { |
6032 | __ata_port_probe(ap); | |
79318057 AV |
6033 | ata_port_wait_eh(ap); |
6034 | } else { | |
6035 | DPRINTK("ata%u: bus probe begin\n", ap->print_id); | |
6036 | rc = ata_bus_probe(ap); | |
6037 | DPRINTK("ata%u: bus probe end\n", ap->print_id); | |
79318057 | 6038 | } |
238c9cf9 JB |
6039 | return rc; |
6040 | } | |
6041 | ||
6042 | ||
6043 | static void async_port_probe(void *data, async_cookie_t cookie) | |
6044 | { | |
6045 | struct ata_port *ap = data; | |
4fca377f | 6046 | |
238c9cf9 JB |
6047 | /* |
6048 | * If we're not allowed to scan this host in parallel, | |
6049 | * we need to wait until all previous scans have completed | |
6050 | * before going further. | |
6051 | * Jeff Garzik says this is only within a controller, so we | |
6052 | * don't need to wait for port 0, only for later ports. | |
6053 | */ | |
6054 | if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0) | |
6055 | async_synchronize_cookie(cookie); | |
6056 | ||
6057 | (void)ata_port_probe(ap); | |
f29d3b23 AV |
6058 | |
6059 | /* in order to keep device order, we need to synchronize at this point */ | |
6060 | async_synchronize_cookie(cookie); | |
6061 | ||
6062 | ata_scsi_scan_host(ap, 1); | |
79318057 | 6063 | } |
238c9cf9 | 6064 | |
f3187195 TH |
6065 | /** |
6066 | * ata_host_register - register initialized ATA host | |
6067 | * @host: ATA host to register | |
6068 | * @sht: template for SCSI host | |
6069 | * | |
6070 | * Register initialized ATA host. @host is allocated using | |
6071 | * ata_host_alloc() and fully initialized by LLD. This function | |
6072 | * starts ports, registers @host with ATA and SCSI layers and | |
6073 | * probe registered devices. | |
6074 | * | |
6075 | * LOCKING: | |
6076 | * Inherited from calling layer (may sleep). | |
6077 | * | |
6078 | * RETURNS: | |
6079 | * 0 on success, -errno otherwise. | |
6080 | */ | |
6081 | int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) | |
6082 | { | |
6083 | int i, rc; | |
6084 | ||
1a112d10 | 6085 | host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE - 1); |
1871ee13 | 6086 | |
f3187195 TH |
6087 | /* host must have been started */ |
6088 | if (!(host->flags & ATA_HOST_STARTED)) { | |
a44fec1f | 6089 | dev_err(host->dev, "BUG: trying to register unstarted host\n"); |
f3187195 TH |
6090 | WARN_ON(1); |
6091 | return -EINVAL; | |
6092 | } | |
6093 | ||
6094 | /* Blow away unused ports. This happens when LLD can't | |
6095 | * determine the exact number of ports to allocate at | |
6096 | * allocation time. | |
6097 | */ | |
6098 | for (i = host->n_ports; host->ports[i]; i++) | |
6099 | kfree(host->ports[i]); | |
6100 | ||
6101 | /* give ports names and add SCSI hosts */ | |
e628dc99 | 6102 | for (i = 0; i < host->n_ports; i++) { |
85d6725b | 6103 | host->ports[i]->print_id = atomic_inc_return(&ata_print_id); |
e628dc99 DM |
6104 | host->ports[i]->local_port_no = i + 1; |
6105 | } | |
4fca377f | 6106 | |
d9027470 GG |
6107 | /* Create associated sysfs transport objects */ |
6108 | for (i = 0; i < host->n_ports; i++) { | |
6109 | rc = ata_tport_add(host->dev,host->ports[i]); | |
6110 | if (rc) { | |
6111 | goto err_tadd; | |
6112 | } | |
6113 | } | |
6114 | ||
f3187195 TH |
6115 | rc = ata_scsi_add_hosts(host, sht); |
6116 | if (rc) | |
d9027470 | 6117 | goto err_tadd; |
f3187195 TH |
6118 | |
6119 | /* set cable, sata_spd_limit and report */ | |
6120 | for (i = 0; i < host->n_ports; i++) { | |
6121 | struct ata_port *ap = host->ports[i]; | |
f3187195 TH |
6122 | unsigned long xfer_mask; |
6123 | ||
6124 | /* set SATA cable type if still unset */ | |
6125 | if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) | |
6126 | ap->cbl = ATA_CBL_SATA; | |
6127 | ||
6128 | /* init sata_spd_limit to the current value */ | |
4fb37a25 | 6129 | sata_link_init_spd(&ap->link); |
b1c72916 TH |
6130 | if (ap->slave_link) |
6131 | sata_link_init_spd(ap->slave_link); | |
f3187195 | 6132 | |
cbcdd875 | 6133 | /* print per-port info to dmesg */ |
f3187195 TH |
6134 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, |
6135 | ap->udma_mask); | |
6136 | ||
abf6e8ed | 6137 | if (!ata_port_is_dummy(ap)) { |
a9a79dfe JP |
6138 | ata_port_info(ap, "%cATA max %s %s\n", |
6139 | (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', | |
6140 | ata_mode_string(xfer_mask), | |
6141 | ap->link.eh_info.desc); | |
abf6e8ed TH |
6142 | ata_ehi_clear_desc(&ap->link.eh_info); |
6143 | } else | |
a9a79dfe | 6144 | ata_port_info(ap, "DUMMY\n"); |
f3187195 TH |
6145 | } |
6146 | ||
f6005354 | 6147 | /* perform each probe asynchronously */ |
f3187195 TH |
6148 | for (i = 0; i < host->n_ports; i++) { |
6149 | struct ata_port *ap = host->ports[i]; | |
79318057 | 6150 | async_schedule(async_port_probe, ap); |
f3187195 | 6151 | } |
f3187195 TH |
6152 | |
6153 | return 0; | |
d9027470 GG |
6154 | |
6155 | err_tadd: | |
6156 | while (--i >= 0) { | |
6157 | ata_tport_delete(host->ports[i]); | |
6158 | } | |
6159 | return rc; | |
6160 | ||
f3187195 TH |
6161 | } |
6162 | ||
f5cda257 TH |
6163 | /** |
6164 | * ata_host_activate - start host, request IRQ and register it | |
6165 | * @host: target ATA host | |
6166 | * @irq: IRQ to request | |
6167 | * @irq_handler: irq_handler used when requesting IRQ | |
6168 | * @irq_flags: irq_flags used when requesting IRQ | |
6169 | * @sht: scsi_host_template to use when registering the host | |
6170 | * | |
6171 | * After allocating an ATA host and initializing it, most libata | |
6172 | * LLDs perform three steps to activate the host - start host, | |
6173 | * request IRQ and register it. This helper takes necessasry | |
6174 | * arguments and performs the three steps in one go. | |
6175 | * | |
3d46b2e2 PM |
6176 | * An invalid IRQ skips the IRQ registration and expects the host to |
6177 | * have set polling mode on the port. In this case, @irq_handler | |
6178 | * should be NULL. | |
6179 | * | |
f5cda257 TH |
6180 | * LOCKING: |
6181 | * Inherited from calling layer (may sleep). | |
6182 | * | |
6183 | * RETURNS: | |
6184 | * 0 on success, -errno otherwise. | |
6185 | */ | |
6186 | int ata_host_activate(struct ata_host *host, int irq, | |
6187 | irq_handler_t irq_handler, unsigned long irq_flags, | |
6188 | struct scsi_host_template *sht) | |
6189 | { | |
cbcdd875 | 6190 | int i, rc; |
f5cda257 TH |
6191 | |
6192 | rc = ata_host_start(host); | |
6193 | if (rc) | |
6194 | return rc; | |
6195 | ||
3d46b2e2 PM |
6196 | /* Special case for polling mode */ |
6197 | if (!irq) { | |
6198 | WARN_ON(irq_handler); | |
6199 | return ata_host_register(host, sht); | |
6200 | } | |
6201 | ||
f5cda257 | 6202 | rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, |
4f37b504 | 6203 | dev_name(host->dev), host); |
f5cda257 TH |
6204 | if (rc) |
6205 | return rc; | |
6206 | ||
cbcdd875 TH |
6207 | for (i = 0; i < host->n_ports; i++) |
6208 | ata_port_desc(host->ports[i], "irq %d", irq); | |
4031826b | 6209 | |
f5cda257 TH |
6210 | rc = ata_host_register(host, sht); |
6211 | /* if failed, just free the IRQ and leave ports alone */ | |
6212 | if (rc) | |
6213 | devm_free_irq(host->dev, irq, host); | |
6214 | ||
6215 | return rc; | |
6216 | } | |
6217 | ||
720ba126 TH |
6218 | /** |
6219 | * ata_port_detach - Detach ATA port in prepration of device removal | |
6220 | * @ap: ATA port to be detached | |
6221 | * | |
6222 | * Detach all ATA devices and the associated SCSI devices of @ap; | |
6223 | * then, remove the associated SCSI host. @ap is guaranteed to | |
6224 | * be quiescent on return from this function. | |
6225 | * | |
6226 | * LOCKING: | |
6227 | * Kernel thread context (may sleep). | |
6228 | */ | |
741b7763 | 6229 | static void ata_port_detach(struct ata_port *ap) |
720ba126 TH |
6230 | { |
6231 | unsigned long flags; | |
a6f9bf4d LK |
6232 | struct ata_link *link; |
6233 | struct ata_device *dev; | |
720ba126 TH |
6234 | |
6235 | if (!ap->ops->error_handler) | |
c3cf30a9 | 6236 | goto skip_eh; |
720ba126 TH |
6237 | |
6238 | /* tell EH we're leaving & flush EH */ | |
ba6a1308 | 6239 | spin_lock_irqsave(ap->lock, flags); |
b51e9e5d | 6240 | ap->pflags |= ATA_PFLAG_UNLOADING; |
ece180d1 | 6241 | ata_port_schedule_eh(ap); |
ba6a1308 | 6242 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 | 6243 | |
ece180d1 | 6244 | /* wait till EH commits suicide */ |
720ba126 TH |
6245 | ata_port_wait_eh(ap); |
6246 | ||
ece180d1 TH |
6247 | /* it better be dead now */ |
6248 | WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED)); | |
720ba126 | 6249 | |
afe2c511 | 6250 | cancel_delayed_work_sync(&ap->hotplug_task); |
720ba126 | 6251 | |
c3cf30a9 | 6252 | skip_eh: |
a6f9bf4d LK |
6253 | /* clean up zpodd on port removal */ |
6254 | ata_for_each_link(link, ap, HOST_FIRST) { | |
6255 | ata_for_each_dev(dev, link, ALL) { | |
6256 | if (zpodd_dev_enabled(dev)) | |
6257 | zpodd_exit(dev); | |
6258 | } | |
6259 | } | |
d9027470 GG |
6260 | if (ap->pmp_link) { |
6261 | int i; | |
6262 | for (i = 0; i < SATA_PMP_MAX_PORTS; i++) | |
6263 | ata_tlink_delete(&ap->pmp_link[i]); | |
6264 | } | |
720ba126 | 6265 | /* remove the associated SCSI host */ |
cca3974e | 6266 | scsi_remove_host(ap->scsi_host); |
c5700766 | 6267 | ata_tport_delete(ap); |
720ba126 TH |
6268 | } |
6269 | ||
0529c159 TH |
6270 | /** |
6271 | * ata_host_detach - Detach all ports of an ATA host | |
6272 | * @host: Host to detach | |
6273 | * | |
6274 | * Detach all ports of @host. | |
6275 | * | |
6276 | * LOCKING: | |
6277 | * Kernel thread context (may sleep). | |
6278 | */ | |
6279 | void ata_host_detach(struct ata_host *host) | |
6280 | { | |
6281 | int i; | |
6282 | ||
6283 | for (i = 0; i < host->n_ports; i++) | |
6284 | ata_port_detach(host->ports[i]); | |
562f0c2d TH |
6285 | |
6286 | /* the host is dead now, dissociate ACPI */ | |
6287 | ata_acpi_dissociate(host); | |
0529c159 TH |
6288 | } |
6289 | ||
374b1873 JG |
6290 | #ifdef CONFIG_PCI |
6291 | ||
1da177e4 LT |
6292 | /** |
6293 | * ata_pci_remove_one - PCI layer callback for device removal | |
6294 | * @pdev: PCI device that was removed | |
6295 | * | |
b878ca5d TH |
6296 | * PCI layer indicates to libata via this hook that hot-unplug or |
6297 | * module unload event has occurred. Detach all ports. Resource | |
6298 | * release is handled via devres. | |
1da177e4 LT |
6299 | * |
6300 | * LOCKING: | |
6301 | * Inherited from PCI layer (may sleep). | |
6302 | */ | |
f0d36efd | 6303 | void ata_pci_remove_one(struct pci_dev *pdev) |
1da177e4 | 6304 | { |
04a3f5b7 | 6305 | struct ata_host *host = pci_get_drvdata(pdev); |
1da177e4 | 6306 | |
b878ca5d | 6307 | ata_host_detach(host); |
1da177e4 LT |
6308 | } |
6309 | ||
6310 | /* move to PCI subsystem */ | |
057ace5e | 6311 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
6312 | { |
6313 | unsigned long tmp = 0; | |
6314 | ||
6315 | switch (bits->width) { | |
6316 | case 1: { | |
6317 | u8 tmp8 = 0; | |
6318 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
6319 | tmp = tmp8; | |
6320 | break; | |
6321 | } | |
6322 | case 2: { | |
6323 | u16 tmp16 = 0; | |
6324 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
6325 | tmp = tmp16; | |
6326 | break; | |
6327 | } | |
6328 | case 4: { | |
6329 | u32 tmp32 = 0; | |
6330 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
6331 | tmp = tmp32; | |
6332 | break; | |
6333 | } | |
6334 | ||
6335 | default: | |
6336 | return -EINVAL; | |
6337 | } | |
6338 | ||
6339 | tmp &= bits->mask; | |
6340 | ||
6341 | return (tmp == bits->val) ? 1 : 0; | |
6342 | } | |
9b847548 | 6343 | |
6ffa01d8 | 6344 | #ifdef CONFIG_PM |
3c5100c1 | 6345 | void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) |
9b847548 JA |
6346 | { |
6347 | pci_save_state(pdev); | |
4c90d971 | 6348 | pci_disable_device(pdev); |
500530f6 | 6349 | |
3a2d5b70 | 6350 | if (mesg.event & PM_EVENT_SLEEP) |
500530f6 | 6351 | pci_set_power_state(pdev, PCI_D3hot); |
9b847548 JA |
6352 | } |
6353 | ||
553c4aa6 | 6354 | int ata_pci_device_do_resume(struct pci_dev *pdev) |
9b847548 | 6355 | { |
553c4aa6 TH |
6356 | int rc; |
6357 | ||
9b847548 JA |
6358 | pci_set_power_state(pdev, PCI_D0); |
6359 | pci_restore_state(pdev); | |
553c4aa6 | 6360 | |
b878ca5d | 6361 | rc = pcim_enable_device(pdev); |
553c4aa6 | 6362 | if (rc) { |
a44fec1f JP |
6363 | dev_err(&pdev->dev, |
6364 | "failed to enable device after resume (%d)\n", rc); | |
553c4aa6 TH |
6365 | return rc; |
6366 | } | |
6367 | ||
9b847548 | 6368 | pci_set_master(pdev); |
553c4aa6 | 6369 | return 0; |
500530f6 TH |
6370 | } |
6371 | ||
3c5100c1 | 6372 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) |
500530f6 | 6373 | { |
04a3f5b7 | 6374 | struct ata_host *host = pci_get_drvdata(pdev); |
500530f6 TH |
6375 | int rc = 0; |
6376 | ||
cca3974e | 6377 | rc = ata_host_suspend(host, mesg); |
500530f6 TH |
6378 | if (rc) |
6379 | return rc; | |
6380 | ||
3c5100c1 | 6381 | ata_pci_device_do_suspend(pdev, mesg); |
500530f6 TH |
6382 | |
6383 | return 0; | |
6384 | } | |
6385 | ||
6386 | int ata_pci_device_resume(struct pci_dev *pdev) | |
6387 | { | |
04a3f5b7 | 6388 | struct ata_host *host = pci_get_drvdata(pdev); |
553c4aa6 | 6389 | int rc; |
500530f6 | 6390 | |
553c4aa6 TH |
6391 | rc = ata_pci_device_do_resume(pdev); |
6392 | if (rc == 0) | |
6393 | ata_host_resume(host); | |
6394 | return rc; | |
9b847548 | 6395 | } |
6ffa01d8 TH |
6396 | #endif /* CONFIG_PM */ |
6397 | ||
1da177e4 LT |
6398 | #endif /* CONFIG_PCI */ |
6399 | ||
b7db04d9 BN |
6400 | /** |
6401 | * ata_platform_remove_one - Platform layer callback for device removal | |
6402 | * @pdev: Platform device that was removed | |
6403 | * | |
6404 | * Platform layer indicates to libata via this hook that hot-unplug or | |
6405 | * module unload event has occurred. Detach all ports. Resource | |
6406 | * release is handled via devres. | |
6407 | * | |
6408 | * LOCKING: | |
6409 | * Inherited from platform layer (may sleep). | |
6410 | */ | |
6411 | int ata_platform_remove_one(struct platform_device *pdev) | |
6412 | { | |
6413 | struct ata_host *host = platform_get_drvdata(pdev); | |
6414 | ||
6415 | ata_host_detach(host); | |
6416 | ||
6417 | return 0; | |
6418 | } | |
6419 | ||
33267325 TH |
6420 | static int __init ata_parse_force_one(char **cur, |
6421 | struct ata_force_ent *force_ent, | |
6422 | const char **reason) | |
6423 | { | |
6424 | /* FIXME: Currently, there's no way to tag init const data and | |
6425 | * using __initdata causes build failure on some versions of | |
6426 | * gcc. Once __initdataconst is implemented, add const to the | |
6427 | * following structure. | |
6428 | */ | |
6429 | static struct ata_force_param force_tbl[] __initdata = { | |
6430 | { "40c", .cbl = ATA_CBL_PATA40 }, | |
6431 | { "80c", .cbl = ATA_CBL_PATA80 }, | |
6432 | { "short40c", .cbl = ATA_CBL_PATA40_SHORT }, | |
6433 | { "unk", .cbl = ATA_CBL_PATA_UNK }, | |
6434 | { "ign", .cbl = ATA_CBL_PATA_IGN }, | |
6435 | { "sata", .cbl = ATA_CBL_SATA }, | |
6436 | { "1.5Gbps", .spd_limit = 1 }, | |
6437 | { "3.0Gbps", .spd_limit = 2 }, | |
6438 | { "noncq", .horkage_on = ATA_HORKAGE_NONCQ }, | |
6439 | { "ncq", .horkage_off = ATA_HORKAGE_NONCQ }, | |
43c9c591 | 6440 | { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID }, |
33267325 TH |
6441 | { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) }, |
6442 | { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) }, | |
6443 | { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) }, | |
6444 | { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) }, | |
6445 | { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) }, | |
6446 | { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) }, | |
6447 | { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) }, | |
6448 | { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) }, | |
6449 | { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) }, | |
6450 | { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) }, | |
6451 | { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) }, | |
6452 | { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) }, | |
6453 | { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
6454 | { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
6455 | { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
6456 | { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
6457 | { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
6458 | { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
6459 | { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
6460 | { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
6461 | { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
6462 | { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
6463 | { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
6464 | { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
6465 | { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
6466 | { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
6467 | { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
6468 | { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
6469 | { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
6470 | { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
6471 | { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
6472 | { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
6473 | { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
6474 | { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) }, | |
05944bdf TH |
6475 | { "nohrst", .lflags = ATA_LFLAG_NO_HRST }, |
6476 | { "nosrst", .lflags = ATA_LFLAG_NO_SRST }, | |
6477 | { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST }, | |
ca6d43b0 | 6478 | { "rstonce", .lflags = ATA_LFLAG_RST_ONCE }, |
966fbe19 | 6479 | { "atapi_dmadir", .horkage_on = ATA_HORKAGE_ATAPI_DMADIR }, |
b8bd6dc3 | 6480 | { "disable", .horkage_on = ATA_HORKAGE_DISABLE }, |
33267325 TH |
6481 | }; |
6482 | char *start = *cur, *p = *cur; | |
6483 | char *id, *val, *endp; | |
6484 | const struct ata_force_param *match_fp = NULL; | |
6485 | int nr_matches = 0, i; | |
6486 | ||
6487 | /* find where this param ends and update *cur */ | |
6488 | while (*p != '\0' && *p != ',') | |
6489 | p++; | |
6490 | ||
6491 | if (*p == '\0') | |
6492 | *cur = p; | |
6493 | else | |
6494 | *cur = p + 1; | |
6495 | ||
6496 | *p = '\0'; | |
6497 | ||
6498 | /* parse */ | |
6499 | p = strchr(start, ':'); | |
6500 | if (!p) { | |
6501 | val = strstrip(start); | |
6502 | goto parse_val; | |
6503 | } | |
6504 | *p = '\0'; | |
6505 | ||
6506 | id = strstrip(start); | |
6507 | val = strstrip(p + 1); | |
6508 | ||
6509 | /* parse id */ | |
6510 | p = strchr(id, '.'); | |
6511 | if (p) { | |
6512 | *p++ = '\0'; | |
6513 | force_ent->device = simple_strtoul(p, &endp, 10); | |
6514 | if (p == endp || *endp != '\0') { | |
6515 | *reason = "invalid device"; | |
6516 | return -EINVAL; | |
6517 | } | |
6518 | } | |
6519 | ||
6520 | force_ent->port = simple_strtoul(id, &endp, 10); | |
6521 | if (p == endp || *endp != '\0') { | |
6522 | *reason = "invalid port/link"; | |
6523 | return -EINVAL; | |
6524 | } | |
6525 | ||
6526 | parse_val: | |
6527 | /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */ | |
6528 | for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { | |
6529 | const struct ata_force_param *fp = &force_tbl[i]; | |
6530 | ||
6531 | if (strncasecmp(val, fp->name, strlen(val))) | |
6532 | continue; | |
6533 | ||
6534 | nr_matches++; | |
6535 | match_fp = fp; | |
6536 | ||
6537 | if (strcasecmp(val, fp->name) == 0) { | |
6538 | nr_matches = 1; | |
6539 | break; | |
6540 | } | |
6541 | } | |
6542 | ||
6543 | if (!nr_matches) { | |
6544 | *reason = "unknown value"; | |
6545 | return -EINVAL; | |
6546 | } | |
6547 | if (nr_matches > 1) { | |
6548 | *reason = "ambigious value"; | |
6549 | return -EINVAL; | |
6550 | } | |
6551 | ||
6552 | force_ent->param = *match_fp; | |
6553 | ||
6554 | return 0; | |
6555 | } | |
6556 | ||
6557 | static void __init ata_parse_force_param(void) | |
6558 | { | |
6559 | int idx = 0, size = 1; | |
6560 | int last_port = -1, last_device = -1; | |
6561 | char *p, *cur, *next; | |
6562 | ||
6563 | /* calculate maximum number of params and allocate force_tbl */ | |
6564 | for (p = ata_force_param_buf; *p; p++) | |
6565 | if (*p == ',') | |
6566 | size++; | |
6567 | ||
6568 | ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL); | |
6569 | if (!ata_force_tbl) { | |
6570 | printk(KERN_WARNING "ata: failed to extend force table, " | |
6571 | "libata.force ignored\n"); | |
6572 | return; | |
6573 | } | |
6574 | ||
6575 | /* parse and populate the table */ | |
6576 | for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { | |
6577 | const char *reason = ""; | |
6578 | struct ata_force_ent te = { .port = -1, .device = -1 }; | |
6579 | ||
6580 | next = cur; | |
6581 | if (ata_parse_force_one(&next, &te, &reason)) { | |
6582 | printk(KERN_WARNING "ata: failed to parse force " | |
6583 | "parameter \"%s\" (%s)\n", | |
6584 | cur, reason); | |
6585 | continue; | |
6586 | } | |
6587 | ||
6588 | if (te.port == -1) { | |
6589 | te.port = last_port; | |
6590 | te.device = last_device; | |
6591 | } | |
6592 | ||
6593 | ata_force_tbl[idx++] = te; | |
6594 | ||
6595 | last_port = te.port; | |
6596 | last_device = te.device; | |
6597 | } | |
6598 | ||
6599 | ata_force_tbl_size = idx; | |
6600 | } | |
1da177e4 | 6601 | |
1da177e4 LT |
6602 | static int __init ata_init(void) |
6603 | { | |
d9027470 | 6604 | int rc; |
270390e1 | 6605 | |
33267325 TH |
6606 | ata_parse_force_param(); |
6607 | ||
270390e1 | 6608 | rc = ata_sff_init(); |
ad72cf98 TH |
6609 | if (rc) { |
6610 | kfree(ata_force_tbl); | |
6611 | return rc; | |
6612 | } | |
453b07ac | 6613 | |
d9027470 GG |
6614 | libata_transport_init(); |
6615 | ata_scsi_transport_template = ata_attach_transport(); | |
6616 | if (!ata_scsi_transport_template) { | |
6617 | ata_sff_exit(); | |
6618 | rc = -ENOMEM; | |
6619 | goto err_out; | |
4fca377f | 6620 | } |
d9027470 | 6621 | |
1da177e4 LT |
6622 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
6623 | return 0; | |
d9027470 GG |
6624 | |
6625 | err_out: | |
6626 | return rc; | |
1da177e4 LT |
6627 | } |
6628 | ||
6629 | static void __exit ata_exit(void) | |
6630 | { | |
d9027470 GG |
6631 | ata_release_transport(ata_scsi_transport_template); |
6632 | libata_transport_exit(); | |
270390e1 | 6633 | ata_sff_exit(); |
33267325 | 6634 | kfree(ata_force_tbl); |
1da177e4 LT |
6635 | } |
6636 | ||
a4625085 | 6637 | subsys_initcall(ata_init); |
1da177e4 LT |
6638 | module_exit(ata_exit); |
6639 | ||
9990b6f3 | 6640 | static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1); |
67846b30 JG |
6641 | |
6642 | int ata_ratelimit(void) | |
6643 | { | |
9990b6f3 | 6644 | return __ratelimit(&ratelimit); |
67846b30 JG |
6645 | } |
6646 | ||
c0c362b6 TH |
6647 | /** |
6648 | * ata_msleep - ATA EH owner aware msleep | |
6649 | * @ap: ATA port to attribute the sleep to | |
6650 | * @msecs: duration to sleep in milliseconds | |
6651 | * | |
6652 | * Sleeps @msecs. If the current task is owner of @ap's EH, the | |
6653 | * ownership is released before going to sleep and reacquired | |
6654 | * after the sleep is complete. IOW, other ports sharing the | |
6655 | * @ap->host will be allowed to own the EH while this task is | |
6656 | * sleeping. | |
6657 | * | |
6658 | * LOCKING: | |
6659 | * Might sleep. | |
6660 | */ | |
97750ceb TH |
6661 | void ata_msleep(struct ata_port *ap, unsigned int msecs) |
6662 | { | |
c0c362b6 TH |
6663 | bool owns_eh = ap && ap->host->eh_owner == current; |
6664 | ||
6665 | if (owns_eh) | |
6666 | ata_eh_release(ap); | |
6667 | ||
97750ceb | 6668 | msleep(msecs); |
c0c362b6 TH |
6669 | |
6670 | if (owns_eh) | |
6671 | ata_eh_acquire(ap); | |
97750ceb TH |
6672 | } |
6673 | ||
c22daff4 TH |
6674 | /** |
6675 | * ata_wait_register - wait until register value changes | |
97750ceb | 6676 | * @ap: ATA port to wait register for, can be NULL |
c22daff4 TH |
6677 | * @reg: IO-mapped register |
6678 | * @mask: Mask to apply to read register value | |
6679 | * @val: Wait condition | |
341c2c95 TH |
6680 | * @interval: polling interval in milliseconds |
6681 | * @timeout: timeout in milliseconds | |
c22daff4 TH |
6682 | * |
6683 | * Waiting for some bits of register to change is a common | |
6684 | * operation for ATA controllers. This function reads 32bit LE | |
6685 | * IO-mapped register @reg and tests for the following condition. | |
6686 | * | |
6687 | * (*@reg & mask) != val | |
6688 | * | |
6689 | * If the condition is met, it returns; otherwise, the process is | |
6690 | * repeated after @interval_msec until timeout. | |
6691 | * | |
6692 | * LOCKING: | |
6693 | * Kernel thread context (may sleep) | |
6694 | * | |
6695 | * RETURNS: | |
6696 | * The final register value. | |
6697 | */ | |
97750ceb | 6698 | u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val, |
341c2c95 | 6699 | unsigned long interval, unsigned long timeout) |
c22daff4 | 6700 | { |
341c2c95 | 6701 | unsigned long deadline; |
c22daff4 TH |
6702 | u32 tmp; |
6703 | ||
6704 | tmp = ioread32(reg); | |
6705 | ||
6706 | /* Calculate timeout _after_ the first read to make sure | |
6707 | * preceding writes reach the controller before starting to | |
6708 | * eat away the timeout. | |
6709 | */ | |
341c2c95 | 6710 | deadline = ata_deadline(jiffies, timeout); |
c22daff4 | 6711 | |
341c2c95 | 6712 | while ((tmp & mask) == val && time_before(jiffies, deadline)) { |
97750ceb | 6713 | ata_msleep(ap, interval); |
c22daff4 TH |
6714 | tmp = ioread32(reg); |
6715 | } | |
6716 | ||
6717 | return tmp; | |
6718 | } | |
6719 | ||
dd5b06c4 TH |
6720 | /* |
6721 | * Dummy port_ops | |
6722 | */ | |
182d7bba | 6723 | static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) |
dd5b06c4 | 6724 | { |
182d7bba | 6725 | return AC_ERR_SYSTEM; |
dd5b06c4 TH |
6726 | } |
6727 | ||
182d7bba | 6728 | static void ata_dummy_error_handler(struct ata_port *ap) |
dd5b06c4 | 6729 | { |
182d7bba | 6730 | /* truly dummy */ |
dd5b06c4 TH |
6731 | } |
6732 | ||
029cfd6b | 6733 | struct ata_port_operations ata_dummy_port_ops = { |
dd5b06c4 TH |
6734 | .qc_prep = ata_noop_qc_prep, |
6735 | .qc_issue = ata_dummy_qc_issue, | |
182d7bba | 6736 | .error_handler = ata_dummy_error_handler, |
e4a9c373 DW |
6737 | .sched_eh = ata_std_sched_eh, |
6738 | .end_eh = ata_std_end_eh, | |
dd5b06c4 TH |
6739 | }; |
6740 | ||
21b0ad4f TH |
6741 | const struct ata_port_info ata_dummy_port_info = { |
6742 | .port_ops = &ata_dummy_port_ops, | |
6743 | }; | |
6744 | ||
a9a79dfe JP |
6745 | /* |
6746 | * Utility print functions | |
6747 | */ | |
d7bead1b JP |
6748 | void ata_port_printk(const struct ata_port *ap, const char *level, |
6749 | const char *fmt, ...) | |
a9a79dfe JP |
6750 | { |
6751 | struct va_format vaf; | |
6752 | va_list args; | |
a9a79dfe JP |
6753 | |
6754 | va_start(args, fmt); | |
6755 | ||
6756 | vaf.fmt = fmt; | |
6757 | vaf.va = &args; | |
6758 | ||
d7bead1b | 6759 | printk("%sata%u: %pV", level, ap->print_id, &vaf); |
a9a79dfe JP |
6760 | |
6761 | va_end(args); | |
a9a79dfe JP |
6762 | } |
6763 | EXPORT_SYMBOL(ata_port_printk); | |
6764 | ||
d7bead1b JP |
6765 | void ata_link_printk(const struct ata_link *link, const char *level, |
6766 | const char *fmt, ...) | |
a9a79dfe JP |
6767 | { |
6768 | struct va_format vaf; | |
6769 | va_list args; | |
a9a79dfe JP |
6770 | |
6771 | va_start(args, fmt); | |
6772 | ||
6773 | vaf.fmt = fmt; | |
6774 | vaf.va = &args; | |
6775 | ||
6776 | if (sata_pmp_attached(link->ap) || link->ap->slave_link) | |
d7bead1b JP |
6777 | printk("%sata%u.%02u: %pV", |
6778 | level, link->ap->print_id, link->pmp, &vaf); | |
a9a79dfe | 6779 | else |
d7bead1b JP |
6780 | printk("%sata%u: %pV", |
6781 | level, link->ap->print_id, &vaf); | |
a9a79dfe JP |
6782 | |
6783 | va_end(args); | |
a9a79dfe JP |
6784 | } |
6785 | EXPORT_SYMBOL(ata_link_printk); | |
6786 | ||
d7bead1b | 6787 | void ata_dev_printk(const struct ata_device *dev, const char *level, |
a9a79dfe JP |
6788 | const char *fmt, ...) |
6789 | { | |
6790 | struct va_format vaf; | |
6791 | va_list args; | |
a9a79dfe JP |
6792 | |
6793 | va_start(args, fmt); | |
6794 | ||
6795 | vaf.fmt = fmt; | |
6796 | vaf.va = &args; | |
6797 | ||
d7bead1b JP |
6798 | printk("%sata%u.%02u: %pV", |
6799 | level, dev->link->ap->print_id, dev->link->pmp + dev->devno, | |
6800 | &vaf); | |
a9a79dfe JP |
6801 | |
6802 | va_end(args); | |
a9a79dfe JP |
6803 | } |
6804 | EXPORT_SYMBOL(ata_dev_printk); | |
6805 | ||
06296a1e JP |
6806 | void ata_print_version(const struct device *dev, const char *version) |
6807 | { | |
6808 | dev_printk(KERN_DEBUG, dev, "version %s\n", version); | |
6809 | } | |
6810 | EXPORT_SYMBOL(ata_print_version); | |
6811 | ||
1da177e4 LT |
6812 | /* |
6813 | * libata is essentially a library of internal helper functions for | |
6814 | * low-level ATA host controller drivers. As such, the API/ABI is | |
6815 | * likely to change as new drivers are added and updated. | |
6816 | * Do not depend on ABI/API stability. | |
6817 | */ | |
e9c83914 TH |
6818 | EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
6819 | EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); | |
6820 | EXPORT_SYMBOL_GPL(sata_deb_timing_long); | |
029cfd6b TH |
6821 | EXPORT_SYMBOL_GPL(ata_base_port_ops); |
6822 | EXPORT_SYMBOL_GPL(sata_port_ops); | |
dd5b06c4 | 6823 | EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
21b0ad4f | 6824 | EXPORT_SYMBOL_GPL(ata_dummy_port_info); |
1eca4365 TH |
6825 | EXPORT_SYMBOL_GPL(ata_link_next); |
6826 | EXPORT_SYMBOL_GPL(ata_dev_next); | |
1da177e4 | 6827 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
d8d9129e | 6828 | EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity); |
cca3974e | 6829 | EXPORT_SYMBOL_GPL(ata_host_init); |
f3187195 | 6830 | EXPORT_SYMBOL_GPL(ata_host_alloc); |
f5cda257 | 6831 | EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); |
b1c72916 | 6832 | EXPORT_SYMBOL_GPL(ata_slave_link_init); |
ecef7253 | 6833 | EXPORT_SYMBOL_GPL(ata_host_start); |
f3187195 | 6834 | EXPORT_SYMBOL_GPL(ata_host_register); |
f5cda257 | 6835 | EXPORT_SYMBOL_GPL(ata_host_activate); |
0529c159 | 6836 | EXPORT_SYMBOL_GPL(ata_host_detach); |
1da177e4 | 6837 | EXPORT_SYMBOL_GPL(ata_sg_init); |
f686bcb8 | 6838 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
dedaf2b0 | 6839 | EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); |
436d34b3 | 6840 | EXPORT_SYMBOL_GPL(atapi_cmd_type); |
1da177e4 LT |
6841 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
6842 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
6357357c TH |
6843 | EXPORT_SYMBOL_GPL(ata_pack_xfermask); |
6844 | EXPORT_SYMBOL_GPL(ata_unpack_xfermask); | |
6845 | EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); | |
6846 | EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); | |
6847 | EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); | |
6848 | EXPORT_SYMBOL_GPL(ata_mode_string); | |
6849 | EXPORT_SYMBOL_GPL(ata_id_xfermask); | |
04351821 | 6850 | EXPORT_SYMBOL_GPL(ata_do_set_mode); |
31cc23b3 | 6851 | EXPORT_SYMBOL_GPL(ata_std_qc_defer); |
e46834cd | 6852 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
10305f0f | 6853 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
3c567b7d | 6854 | EXPORT_SYMBOL_GPL(sata_set_spd); |
aa2731ad | 6855 | EXPORT_SYMBOL_GPL(ata_wait_after_reset); |
936fd732 TH |
6856 | EXPORT_SYMBOL_GPL(sata_link_debounce); |
6857 | EXPORT_SYMBOL_GPL(sata_link_resume); | |
1152b261 | 6858 | EXPORT_SYMBOL_GPL(sata_link_scr_lpm); |
0aa1113d | 6859 | EXPORT_SYMBOL_GPL(ata_std_prereset); |
cc0680a5 | 6860 | EXPORT_SYMBOL_GPL(sata_link_hardreset); |
57c9efdf | 6861 | EXPORT_SYMBOL_GPL(sata_std_hardreset); |
203c75b8 | 6862 | EXPORT_SYMBOL_GPL(ata_std_postreset); |
2e9edbf8 JG |
6863 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
6864 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
67846b30 | 6865 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
97750ceb | 6866 | EXPORT_SYMBOL_GPL(ata_msleep); |
c22daff4 | 6867 | EXPORT_SYMBOL_GPL(ata_wait_register); |
1da177e4 | 6868 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); |
1da177e4 | 6869 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
83c47bcb | 6870 | EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); |
a6e6ce8e | 6871 | EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); |
f6e67035 | 6872 | EXPORT_SYMBOL_GPL(__ata_change_queue_depth); |
34bf2170 TH |
6873 | EXPORT_SYMBOL_GPL(sata_scr_valid); |
6874 | EXPORT_SYMBOL_GPL(sata_scr_read); | |
6875 | EXPORT_SYMBOL_GPL(sata_scr_write); | |
6876 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); | |
936fd732 TH |
6877 | EXPORT_SYMBOL_GPL(ata_link_online); |
6878 | EXPORT_SYMBOL_GPL(ata_link_offline); | |
6ffa01d8 | 6879 | #ifdef CONFIG_PM |
cca3974e JG |
6880 | EXPORT_SYMBOL_GPL(ata_host_suspend); |
6881 | EXPORT_SYMBOL_GPL(ata_host_resume); | |
6ffa01d8 | 6882 | #endif /* CONFIG_PM */ |
6a62a04d TH |
6883 | EXPORT_SYMBOL_GPL(ata_id_string); |
6884 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
963e4975 | 6885 | EXPORT_SYMBOL_GPL(ata_do_dev_read_id); |
1da177e4 LT |
6886 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
6887 | ||
1bc4ccff | 6888 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
6357357c | 6889 | EXPORT_SYMBOL_GPL(ata_timing_find_mode); |
452503f9 AC |
6890 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
6891 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
a0f79b92 | 6892 | EXPORT_SYMBOL_GPL(ata_timing_cycle2mode); |
452503f9 | 6893 | |
1da177e4 LT |
6894 | #ifdef CONFIG_PCI |
6895 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
1da177e4 | 6896 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); |
6ffa01d8 | 6897 | #ifdef CONFIG_PM |
500530f6 TH |
6898 | EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
6899 | EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); | |
9b847548 JA |
6900 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
6901 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
6ffa01d8 | 6902 | #endif /* CONFIG_PM */ |
1da177e4 | 6903 | #endif /* CONFIG_PCI */ |
9b847548 | 6904 | |
b7db04d9 BN |
6905 | EXPORT_SYMBOL_GPL(ata_platform_remove_one); |
6906 | ||
b64bbc39 TH |
6907 | EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); |
6908 | EXPORT_SYMBOL_GPL(ata_ehi_push_desc); | |
6909 | EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); | |
cbcdd875 TH |
6910 | EXPORT_SYMBOL_GPL(ata_port_desc); |
6911 | #ifdef CONFIG_PCI | |
6912 | EXPORT_SYMBOL_GPL(ata_port_pbar_desc); | |
6913 | #endif /* CONFIG_PCI */ | |
7b70fc03 | 6914 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
dbd82616 | 6915 | EXPORT_SYMBOL_GPL(ata_link_abort); |
7b70fc03 | 6916 | EXPORT_SYMBOL_GPL(ata_port_abort); |
e3180499 | 6917 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
7d77b247 | 6918 | EXPORT_SYMBOL_GPL(sata_async_notification); |
e3180499 TH |
6919 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
6920 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); | |
ece1d636 TH |
6921 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
6922 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
10acf3b0 | 6923 | EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error); |
022bdb07 | 6924 | EXPORT_SYMBOL_GPL(ata_do_eh); |
a1efdaba | 6925 | EXPORT_SYMBOL_GPL(ata_std_error_handler); |
be0d18df AC |
6926 | |
6927 | EXPORT_SYMBOL_GPL(ata_cable_40wire); | |
6928 | EXPORT_SYMBOL_GPL(ata_cable_80wire); | |
6929 | EXPORT_SYMBOL_GPL(ata_cable_unknown); | |
c88f90c3 | 6930 | EXPORT_SYMBOL_GPL(ata_cable_ignore); |
be0d18df | 6931 | EXPORT_SYMBOL_GPL(ata_cable_sata); |