Commit | Line | Data |
---|---|---|
11ef697b KCA |
1 | /* |
2 | * libata-acpi.c | |
3 | * Provides ACPI support for PATA/SATA. | |
4 | * | |
5 | * Copyright (C) 2006 Intel Corp. | |
6 | * Copyright (C) 2006 Randy Dunlap | |
7 | */ | |
8 | ||
9 | #include <linux/ata.h> | |
10 | #include <linux/delay.h> | |
11 | #include <linux/device.h> | |
12 | #include <linux/errno.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/acpi.h> | |
15 | #include <linux/libata.h> | |
16 | #include <linux/pci.h> | |
17 | #include "libata.h" | |
18 | ||
19 | #include <acpi/acpi_bus.h> | |
20 | #include <acpi/acnames.h> | |
21 | #include <acpi/acnamesp.h> | |
22 | #include <acpi/acparser.h> | |
23 | #include <acpi/acexcep.h> | |
24 | #include <acpi/acmacros.h> | |
25 | #include <acpi/actypes.h> | |
26 | ||
11ef697b | 27 | #define NO_PORT_MULT 0xffff |
fafbae87 | 28 | #define SATA_ADR(root,pmp) (((root) << 16) | (pmp)) |
11ef697b KCA |
29 | |
30 | #define REGS_PER_GTF 7 | |
4700c4bc TH |
31 | struct ata_acpi_gtf { |
32 | u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
33 | } __packed; | |
11ef697b | 34 | |
ca426635 AC |
35 | /* |
36 | * Helper - belongs in the PCI layer somewhere eventually | |
37 | */ | |
38 | static int is_pci_dev(struct device *dev) | |
39 | { | |
40 | return (dev->bus == &pci_bus_type); | |
41 | } | |
11ef697b | 42 | |
fafbae87 | 43 | static void ata_acpi_associate_sata_port(struct ata_port *ap) |
11ef697b | 44 | { |
fafbae87 TH |
45 | acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT); |
46 | ||
47 | ap->device->acpi_handle = acpi_get_child(ap->host->acpi_handle, adr); | |
11ef697b KCA |
48 | } |
49 | ||
fafbae87 | 50 | static void ata_acpi_associate_ide_port(struct ata_port *ap) |
11ef697b | 51 | { |
fafbae87 | 52 | int max_devices, i; |
11ef697b | 53 | |
fafbae87 TH |
54 | ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no); |
55 | if (!ap->acpi_handle) | |
56 | return; | |
11ef697b | 57 | |
fafbae87 TH |
58 | max_devices = 1; |
59 | if (ap->flags & ATA_FLAG_SLAVE_POSS) | |
60 | max_devices++; | |
11ef697b | 61 | |
fafbae87 TH |
62 | for (i = 0; i < max_devices; i++) { |
63 | struct ata_device *dev = &ap->device[i]; | |
11ef697b | 64 | |
fafbae87 | 65 | dev->acpi_handle = acpi_get_child(ap->acpi_handle, i); |
11ef697b | 66 | } |
11ef697b KCA |
67 | } |
68 | ||
fafbae87 TH |
69 | /** |
70 | * ata_acpi_associate - associate ATA host with ACPI objects | |
71 | * @host: target ATA host | |
72 | * | |
73 | * Look up ACPI objects associated with @host and initialize | |
74 | * acpi_handle fields of @host, its ports and devices accordingly. | |
75 | * | |
76 | * LOCKING: | |
77 | * EH context. | |
78 | * | |
79 | * RETURNS: | |
80 | * 0 on success, -errno on failure. | |
81 | */ | |
82 | void ata_acpi_associate(struct ata_host *host) | |
11ef697b | 83 | { |
fafbae87 | 84 | int i; |
11ef697b | 85 | |
fafbae87 TH |
86 | if (!is_pci_dev(host->dev) || libata_noacpi) |
87 | return; | |
11ef697b | 88 | |
fafbae87 TH |
89 | host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev); |
90 | if (!host->acpi_handle) | |
91 | return; | |
11ef697b | 92 | |
fafbae87 TH |
93 | for (i = 0; i < host->n_ports; i++) { |
94 | struct ata_port *ap = host->ports[i]; | |
95 | ||
96 | if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA) | |
97 | ata_acpi_associate_sata_port(ap); | |
98 | else | |
99 | ata_acpi_associate_ide_port(ap); | |
11ef697b | 100 | } |
11ef697b KCA |
101 | } |
102 | ||
64578a3d TH |
103 | /** |
104 | * ata_acpi_gtm - execute _GTM | |
105 | * @ap: target ATA port | |
106 | * @gtm: out parameter for _GTM result | |
107 | * | |
108 | * Evaluate _GTM and store the result in @gtm. | |
109 | * | |
110 | * LOCKING: | |
111 | * EH context. | |
112 | * | |
113 | * RETURNS: | |
114 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
115 | */ | |
116 | static int ata_acpi_gtm(const struct ata_port *ap, struct ata_acpi_gtm *gtm) | |
117 | { | |
118 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
119 | union acpi_object *out_obj; | |
120 | acpi_status status; | |
121 | int rc = 0; | |
122 | ||
123 | status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output); | |
124 | ||
125 | rc = -ENOENT; | |
126 | if (status == AE_NOT_FOUND) | |
127 | goto out_free; | |
128 | ||
129 | rc = -EINVAL; | |
130 | if (ACPI_FAILURE(status)) { | |
131 | ata_port_printk(ap, KERN_ERR, | |
132 | "ACPI get timing mode failed (AE 0x%x)\n", | |
133 | status); | |
134 | goto out_free; | |
135 | } | |
136 | ||
137 | out_obj = output.pointer; | |
138 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
139 | ata_port_printk(ap, KERN_WARNING, | |
140 | "_GTM returned unexpected object type 0x%x\n", | |
141 | out_obj->type); | |
142 | ||
143 | goto out_free; | |
144 | } | |
145 | ||
146 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
147 | ata_port_printk(ap, KERN_ERR, | |
148 | "_GTM returned invalid length %d\n", | |
149 | out_obj->buffer.length); | |
150 | goto out_free; | |
151 | } | |
152 | ||
153 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
154 | rc = 0; | |
155 | out_free: | |
156 | kfree(output.pointer); | |
157 | return rc; | |
158 | } | |
159 | ||
160 | /** | |
161 | * ata_acpi_stm - execute _STM | |
162 | * @ap: target ATA port | |
163 | * @stm: timing parameter to _STM | |
164 | * | |
165 | * Evaluate _STM with timing parameter @stm. | |
166 | * | |
167 | * LOCKING: | |
168 | * EH context. | |
169 | * | |
170 | * RETURNS: | |
171 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
172 | */ | |
173 | static int ata_acpi_stm(const struct ata_port *ap, struct ata_acpi_gtm *stm) | |
174 | { | |
175 | acpi_status status; | |
176 | struct acpi_object_list input; | |
177 | union acpi_object in_params[3]; | |
178 | ||
179 | in_params[0].type = ACPI_TYPE_BUFFER; | |
180 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
181 | in_params[0].buffer.pointer = (u8 *)stm; | |
182 | /* Buffers for id may need byteswapping ? */ | |
183 | in_params[1].type = ACPI_TYPE_BUFFER; | |
184 | in_params[1].buffer.length = 512; | |
185 | in_params[1].buffer.pointer = (u8 *)ap->device[0].id; | |
186 | in_params[2].type = ACPI_TYPE_BUFFER; | |
187 | in_params[2].buffer.length = 512; | |
188 | in_params[2].buffer.pointer = (u8 *)ap->device[1].id; | |
189 | ||
190 | input.count = 3; | |
191 | input.pointer = in_params; | |
192 | ||
193 | status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL); | |
194 | ||
195 | if (status == AE_NOT_FOUND) | |
196 | return -ENOENT; | |
197 | if (ACPI_FAILURE(status)) { | |
198 | ata_port_printk(ap, KERN_ERR, | |
199 | "ACPI set timing mode failed (status=0x%x)\n", status); | |
200 | return -EINVAL; | |
201 | } | |
202 | return 0; | |
203 | } | |
204 | ||
11ef697b | 205 | /** |
4700c4bc | 206 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
3a32a8e9 | 207 | * @dev: target ATA device |
4700c4bc TH |
208 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
209 | * @ptr_to_free: pointer which should be freed | |
11ef697b KCA |
210 | * |
211 | * This applies to both PATA and SATA drives. | |
212 | * | |
213 | * The _GTF method has no input parameters. | |
214 | * It returns a variable number of register set values (registers | |
215 | * hex 1F1..1F7, taskfiles). | |
216 | * The <variable number> is not known in advance, so have ACPI-CA | |
217 | * allocate the buffer as needed and return it, then free it later. | |
218 | * | |
4700c4bc TH |
219 | * LOCKING: |
220 | * EH context. | |
221 | * | |
222 | * RETURNS: | |
223 | * Number of taskfiles on success, 0 if _GTF doesn't exist or doesn't | |
224 | * contain valid data. -errno on other errors. | |
11ef697b | 225 | */ |
4700c4bc TH |
226 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf, |
227 | void **ptr_to_free) | |
11ef697b | 228 | { |
3a32a8e9 TH |
229 | struct ata_port *ap = dev->ap; |
230 | acpi_status status; | |
3a32a8e9 TH |
231 | struct acpi_buffer output; |
232 | union acpi_object *out_obj; | |
4700c4bc | 233 | int rc = 0; |
11ef697b | 234 | |
4700c4bc TH |
235 | /* set up output buffer */ |
236 | output.length = ACPI_ALLOCATE_BUFFER; | |
237 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
11ef697b | 238 | |
11ef697b | 239 | if (ata_msg_probe(ap)) |
3a32a8e9 | 240 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n", |
878d4fed | 241 | __FUNCTION__, ap->port_no); |
11ef697b | 242 | |
11ef697b | 243 | /* _GTF has no input parameters */ |
4700c4bc TH |
244 | status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output); |
245 | ||
11ef697b | 246 | if (ACPI_FAILURE(status)) { |
4700c4bc TH |
247 | if (status != AE_NOT_FOUND) { |
248 | ata_dev_printk(dev, KERN_WARNING, | |
249 | "_GTF evaluation failed (AE 0x%x)\n", | |
250 | status); | |
251 | rc = -EIO; | |
252 | } | |
253 | goto out_free; | |
11ef697b KCA |
254 | } |
255 | ||
256 | if (!output.length || !output.pointer) { | |
257 | if (ata_msg_probe(ap)) | |
3a32a8e9 | 258 | ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: " |
11ef697b KCA |
259 | "length or ptr is NULL (0x%llx, 0x%p)\n", |
260 | __FUNCTION__, | |
261 | (unsigned long long)output.length, | |
262 | output.pointer); | |
4700c4bc | 263 | goto out_free; |
11ef697b KCA |
264 | } |
265 | ||
266 | out_obj = output.pointer; | |
267 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
69b16a5f TH |
268 | ata_dev_printk(dev, KERN_WARNING, |
269 | "_GTF unexpected object type 0x%x\n", | |
270 | out_obj->type); | |
4700c4bc TH |
271 | rc = -EINVAL; |
272 | goto out_free; | |
11ef697b KCA |
273 | } |
274 | ||
4700c4bc | 275 | if (out_obj->buffer.length % REGS_PER_GTF) { |
69b16a5f TH |
276 | ata_dev_printk(dev, KERN_WARNING, |
277 | "unexpected _GTF length (%d)\n", | |
278 | out_obj->buffer.length); | |
4700c4bc TH |
279 | rc = -EINVAL; |
280 | goto out_free; | |
11ef697b KCA |
281 | } |
282 | ||
4700c4bc TH |
283 | *ptr_to_free = out_obj; |
284 | *gtf = (void *)out_obj->buffer.pointer; | |
285 | rc = out_obj->buffer.length / REGS_PER_GTF; | |
286 | ||
11ef697b | 287 | if (ata_msg_probe(ap)) |
3a32a8e9 | 288 | ata_dev_printk(dev, KERN_DEBUG, "%s: returning " |
4700c4bc TH |
289 | "gtf=%p, gtf_count=%d, ptr_to_free=%p\n", |
290 | __FUNCTION__, *gtf, rc, *ptr_to_free); | |
291 | return rc; | |
292 | ||
293 | out_free: | |
294 | kfree(output.pointer); | |
295 | return rc; | |
11ef697b KCA |
296 | } |
297 | ||
298 | /** | |
299 | * taskfile_load_raw - send taskfile registers to host controller | |
3a32a8e9 | 300 | * @dev: target ATA device |
11ef697b KCA |
301 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
302 | * | |
303 | * Outputs ATA taskfile to standard ATA host controller using MMIO | |
304 | * or PIO as indicated by the ATA_FLAG_MMIO flag. | |
305 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. | |
306 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
307 | * hob_lbal, hob_lbam, and hob_lbah. | |
308 | * | |
309 | * This function waits for idle (!BUSY and !DRQ) after writing | |
310 | * registers. If the control register has a new value, this | |
311 | * function also waits for idle after writing control and before | |
312 | * writing the remaining registers. | |
313 | * | |
4700c4bc TH |
314 | * LOCKING: |
315 | * EH context. | |
316 | * | |
317 | * RETURNS: | |
318 | * 0 on success, -errno on failure. | |
11ef697b | 319 | */ |
4700c4bc TH |
320 | static int taskfile_load_raw(struct ata_device *dev, |
321 | const struct ata_acpi_gtf *gtf) | |
11ef697b | 322 | { |
3a32a8e9 | 323 | struct ata_port *ap = dev->ap; |
4700c4bc TH |
324 | struct ata_taskfile tf, rtf; |
325 | unsigned int err_mask; | |
fc16c25f | 326 | |
4700c4bc TH |
327 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
328 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
329 | && (gtf->tf[6] == 0)) | |
330 | return 0; | |
11ef697b | 331 | |
3a32a8e9 | 332 | ata_tf_init(dev, &tf); |
fc16c25f JG |
333 | |
334 | /* convert gtf to tf */ | |
335 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; /* TBD */ | |
48be6b18 | 336 | tf.protocol = ATA_PROT_NODATA; |
4700c4bc TH |
337 | tf.feature = gtf->tf[0]; /* 0x1f1 */ |
338 | tf.nsect = gtf->tf[1]; /* 0x1f2 */ | |
339 | tf.lbal = gtf->tf[2]; /* 0x1f3 */ | |
340 | tf.lbam = gtf->tf[3]; /* 0x1f4 */ | |
341 | tf.lbah = gtf->tf[4]; /* 0x1f5 */ | |
342 | tf.device = gtf->tf[5]; /* 0x1f6 */ | |
343 | tf.command = gtf->tf[6]; /* 0x1f7 */ | |
344 | ||
345 | if (ata_msg_probe(ap)) | |
346 | ata_dev_printk(dev, KERN_DEBUG, "executing ACPI cmd " | |
347 | "%02x/%02x:%02x:%02x:%02x:%02x:%02x\n", | |
348 | tf.command, tf.feature, tf.nsect, | |
349 | tf.lbal, tf.lbam, tf.lbah, tf.device); | |
350 | ||
351 | rtf = tf; | |
352 | err_mask = ata_exec_internal(dev, &rtf, NULL, DMA_NONE, NULL, 0); | |
353 | if (err_mask) { | |
3a32a8e9 | 354 | ata_dev_printk(dev, KERN_ERR, |
4700c4bc TH |
355 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x failed " |
356 | "(Emask=0x%x Stat=0x%02x Err=0x%02x)\n", | |
357 | tf.command, tf.feature, tf.nsect, tf.lbal, tf.lbam, | |
358 | tf.lbah, tf.device, err_mask, rtf.command, rtf.feature); | |
359 | return -EIO; | |
360 | } | |
361 | ||
362 | return 0; | |
11ef697b KCA |
363 | } |
364 | ||
11ef697b KCA |
365 | /** |
366 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 367 | * @dev: target ATA device |
11ef697b | 368 | * |
6746544c | 369 | * Evaluate _GTF and excute returned taskfiles. |
69b16a5f TH |
370 | * |
371 | * LOCKING: | |
372 | * EH context. | |
373 | * | |
374 | * RETURNS: | |
6746544c TH |
375 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist or |
376 | * doesn't contain valid data. -errno on other errors. | |
11ef697b | 377 | */ |
6746544c | 378 | static int ata_acpi_exec_tfs(struct ata_device *dev) |
11ef697b | 379 | { |
6746544c TH |
380 | struct ata_acpi_gtf *gtf = NULL; |
381 | void *ptr_to_free = NULL; | |
382 | int gtf_count, i, rc; | |
383 | ||
384 | /* get taskfiles */ | |
385 | rc = ata_dev_get_GTF(dev, >f, &ptr_to_free); | |
386 | if (rc < 0) | |
387 | return rc; | |
388 | gtf_count = rc; | |
389 | ||
390 | /* execute them */ | |
391 | for (i = 0, rc = 0; i < gtf_count; i++) { | |
392 | int tmp; | |
393 | ||
394 | /* ACPI errors are eventually ignored. Run till the | |
395 | * end even after errors. | |
396 | */ | |
397 | tmp = taskfile_load_raw(dev, gtf++); | |
398 | if (!rc) | |
399 | rc = tmp; | |
11ef697b KCA |
400 | } |
401 | ||
6746544c TH |
402 | kfree(ptr_to_free); |
403 | ||
404 | if (rc == 0) | |
405 | return gtf_count; | |
406 | return rc; | |
11ef697b KCA |
407 | } |
408 | ||
7ea1fbc2 KCA |
409 | /** |
410 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 411 | * @dev: target ATA device |
7ea1fbc2 KCA |
412 | * |
413 | * _SDD ACPI object: for SATA mode only | |
414 | * Must be after Identify (Packet) Device -- uses its data | |
415 | * ATM this function never returns a failure. It is an optional | |
416 | * method and if it fails for whatever reason, we should still | |
417 | * just keep going. | |
69b16a5f TH |
418 | * |
419 | * LOCKING: | |
420 | * EH context. | |
421 | * | |
422 | * RETURNS: | |
423 | * 0 on success, -errno on failure. | |
7ea1fbc2 | 424 | */ |
6746544c | 425 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 426 | { |
3a32a8e9 | 427 | struct ata_port *ap = dev->ap; |
3a32a8e9 | 428 | int err; |
3a32a8e9 TH |
429 | acpi_status status; |
430 | struct acpi_object_list input; | |
431 | union acpi_object in_params[1]; | |
7ea1fbc2 | 432 | |
7ea1fbc2 | 433 | if (ata_msg_probe(ap)) |
3a32a8e9 TH |
434 | ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n", |
435 | __FUNCTION__, dev->devno, ap->port_no); | |
7ea1fbc2 | 436 | |
7ea1fbc2 KCA |
437 | /* Give the drive Identify data to the drive via the _SDD method */ |
438 | /* _SDD: set up input parameters */ | |
439 | input.count = 1; | |
440 | input.pointer = in_params; | |
441 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
442 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
443 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
444 | /* Output buffer: _SDD has no output */ |
445 | ||
446 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 447 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
fafbae87 | 448 | status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL); |
3a32a8e9 | 449 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 KCA |
450 | |
451 | err = ACPI_FAILURE(status) ? -EIO : 0; | |
69b16a5f TH |
452 | if (err < 0) |
453 | ata_dev_printk(dev, KERN_WARNING, | |
454 | "ACPI _SDD failed (AE 0x%x)\n", status); | |
7ea1fbc2 | 455 | |
6746544c TH |
456 | return err; |
457 | } | |
458 | ||
64578a3d TH |
459 | /** |
460 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
461 | * @ap: target ATA port | |
462 | * | |
463 | * This function is called when @ap is about to be suspended. All | |
464 | * devices are already put to sleep but the port_suspend() callback | |
465 | * hasn't been executed yet. Error return from this function aborts | |
466 | * suspend. | |
467 | * | |
468 | * LOCKING: | |
469 | * EH context. | |
470 | * | |
471 | * RETURNS: | |
472 | * 0 on success, -errno on failure. | |
473 | */ | |
474 | int ata_acpi_on_suspend(struct ata_port *ap) | |
475 | { | |
476 | unsigned long flags; | |
477 | int rc; | |
478 | ||
479 | /* proceed iff per-port acpi_handle is valid */ | |
480 | if (!ap->acpi_handle) | |
481 | return 0; | |
482 | BUG_ON(ap->flags & ATA_FLAG_ACPI_SATA); | |
483 | ||
484 | /* store timing parameters */ | |
485 | rc = ata_acpi_gtm(ap, &ap->acpi_gtm); | |
486 | ||
487 | spin_lock_irqsave(ap->lock, flags); | |
488 | if (rc == 0) | |
489 | ap->pflags |= ATA_PFLAG_GTM_VALID; | |
490 | else | |
491 | ap->pflags &= ~ATA_PFLAG_GTM_VALID; | |
492 | spin_unlock_irqrestore(ap->lock, flags); | |
493 | ||
494 | if (rc == -ENOENT) | |
495 | rc = 0; | |
496 | return rc; | |
497 | } | |
498 | ||
6746544c TH |
499 | /** |
500 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
501 | * @ap: target ATA port | |
502 | * | |
503 | * This function is called when @ap is resumed - right after port | |
504 | * itself is resumed but before any EH action is taken. | |
505 | * | |
506 | * LOCKING: | |
507 | * EH context. | |
508 | */ | |
509 | void ata_acpi_on_resume(struct ata_port *ap) | |
510 | { | |
511 | int i; | |
512 | ||
64578a3d TH |
513 | if (ap->acpi_handle && (ap->pflags & ATA_PFLAG_GTM_VALID)) { |
514 | BUG_ON(ap->flags & ATA_FLAG_ACPI_SATA); | |
515 | ||
516 | /* restore timing parameters */ | |
517 | ata_acpi_stm(ap, &ap->acpi_gtm); | |
518 | } | |
519 | ||
6746544c TH |
520 | /* schedule _GTF */ |
521 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
522 | ap->device[i].flags |= ATA_DFLAG_ACPI_PENDING; | |
7ea1fbc2 KCA |
523 | } |
524 | ||
6746544c TH |
525 | /** |
526 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
527 | * @dev: target ATA device | |
528 | * | |
529 | * This function is called when @dev is about to be configured. | |
530 | * IDENTIFY data might have been modified after this hook is run. | |
531 | * | |
532 | * LOCKING: | |
533 | * EH context. | |
534 | * | |
535 | * RETURNS: | |
536 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
537 | * -errno on failure. | |
538 | */ | |
539 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
540 | { | |
541 | struct ata_port *ap = dev->ap; | |
542 | struct ata_eh_context *ehc = &ap->eh_context; | |
543 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; | |
544 | int rc; | |
545 | ||
6746544c TH |
546 | if (!dev->acpi_handle) |
547 | return 0; | |
548 | ||
549 | /* do we need to do _GTF? */ | |
550 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
551 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
552 | return 0; | |
553 | ||
554 | /* do _SDD if SATA */ | |
555 | if (acpi_sata) { | |
556 | rc = ata_acpi_push_id(dev); | |
557 | if (rc) | |
558 | goto acpi_err; | |
559 | } | |
560 | ||
561 | /* do _GTF */ | |
562 | rc = ata_acpi_exec_tfs(dev); | |
563 | if (rc < 0) | |
564 | goto acpi_err; | |
565 | ||
566 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
567 | ||
568 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
569 | if (rc > 0) { | |
570 | rc = ata_dev_reread_id(dev, 0); | |
571 | if (rc < 0) { | |
572 | ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY " | |
573 | "after ACPI commands\n"); | |
574 | return rc; | |
575 | } | |
576 | } | |
577 | ||
578 | return 0; | |
579 | ||
580 | acpi_err: | |
581 | /* let EH retry on the first failure, disable ACPI on the second */ | |
582 | if (dev->flags & ATA_DFLAG_ACPI_FAILED) { | |
583 | ata_dev_printk(dev, KERN_WARNING, "ACPI on devcfg failed the " | |
584 | "second time, disabling (errno=%d)\n", rc); | |
585 | ||
586 | dev->acpi_handle = NULL; | |
587 | ||
588 | /* if port is working, request IDENTIFY reload and continue */ | |
589 | if (!(ap->pflags & ATA_PFLAG_FROZEN)) | |
590 | rc = 1; | |
591 | } | |
592 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
593 | return rc; | |
594 | } |