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 | ||
9af5c9c9 TH |
47 | ap->link.device->acpi_handle = |
48 | acpi_get_child(ap->host->acpi_handle, adr); | |
11ef697b KCA |
49 | } |
50 | ||
fafbae87 | 51 | static void ata_acpi_associate_ide_port(struct ata_port *ap) |
11ef697b | 52 | { |
fafbae87 | 53 | int max_devices, i; |
11ef697b | 54 | |
fafbae87 TH |
55 | ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no); |
56 | if (!ap->acpi_handle) | |
57 | return; | |
11ef697b | 58 | |
fafbae87 TH |
59 | max_devices = 1; |
60 | if (ap->flags & ATA_FLAG_SLAVE_POSS) | |
61 | max_devices++; | |
11ef697b | 62 | |
fafbae87 | 63 | for (i = 0; i < max_devices; i++) { |
9af5c9c9 | 64 | struct ata_device *dev = &ap->link.device[i]; |
11ef697b | 65 | |
fafbae87 | 66 | dev->acpi_handle = acpi_get_child(ap->acpi_handle, i); |
11ef697b | 67 | } |
11ef697b KCA |
68 | } |
69 | ||
fafbae87 TH |
70 | /** |
71 | * ata_acpi_associate - associate ATA host with ACPI objects | |
72 | * @host: target ATA host | |
73 | * | |
74 | * Look up ACPI objects associated with @host and initialize | |
75 | * acpi_handle fields of @host, its ports and devices accordingly. | |
76 | * | |
77 | * LOCKING: | |
78 | * EH context. | |
79 | * | |
80 | * RETURNS: | |
81 | * 0 on success, -errno on failure. | |
82 | */ | |
83 | void ata_acpi_associate(struct ata_host *host) | |
11ef697b | 84 | { |
fafbae87 | 85 | int i; |
11ef697b | 86 | |
fafbae87 TH |
87 | if (!is_pci_dev(host->dev) || libata_noacpi) |
88 | return; | |
11ef697b | 89 | |
fafbae87 TH |
90 | host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev); |
91 | if (!host->acpi_handle) | |
92 | return; | |
11ef697b | 93 | |
fafbae87 TH |
94 | for (i = 0; i < host->n_ports; i++) { |
95 | struct ata_port *ap = host->ports[i]; | |
96 | ||
97 | if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA) | |
98 | ata_acpi_associate_sata_port(ap); | |
99 | else | |
100 | ata_acpi_associate_ide_port(ap); | |
11ef697b | 101 | } |
11ef697b KCA |
102 | } |
103 | ||
64578a3d TH |
104 | /** |
105 | * ata_acpi_gtm - execute _GTM | |
106 | * @ap: target ATA port | |
107 | * @gtm: out parameter for _GTM result | |
108 | * | |
109 | * Evaluate _GTM and store the result in @gtm. | |
110 | * | |
111 | * LOCKING: | |
112 | * EH context. | |
113 | * | |
114 | * RETURNS: | |
115 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
116 | */ | |
117 | static int ata_acpi_gtm(const struct ata_port *ap, struct ata_acpi_gtm *gtm) | |
118 | { | |
119 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
120 | union acpi_object *out_obj; | |
121 | acpi_status status; | |
122 | int rc = 0; | |
123 | ||
124 | status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output); | |
125 | ||
126 | rc = -ENOENT; | |
127 | if (status == AE_NOT_FOUND) | |
128 | goto out_free; | |
129 | ||
130 | rc = -EINVAL; | |
131 | if (ACPI_FAILURE(status)) { | |
132 | ata_port_printk(ap, KERN_ERR, | |
133 | "ACPI get timing mode failed (AE 0x%x)\n", | |
134 | status); | |
135 | goto out_free; | |
136 | } | |
137 | ||
138 | out_obj = output.pointer; | |
139 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
140 | ata_port_printk(ap, KERN_WARNING, | |
141 | "_GTM returned unexpected object type 0x%x\n", | |
142 | out_obj->type); | |
143 | ||
144 | goto out_free; | |
145 | } | |
146 | ||
147 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
148 | ata_port_printk(ap, KERN_ERR, | |
149 | "_GTM returned invalid length %d\n", | |
150 | out_obj->buffer.length); | |
151 | goto out_free; | |
152 | } | |
153 | ||
154 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
155 | rc = 0; | |
156 | out_free: | |
157 | kfree(output.pointer); | |
158 | return rc; | |
159 | } | |
160 | ||
161 | /** | |
162 | * ata_acpi_stm - execute _STM | |
163 | * @ap: target ATA port | |
164 | * @stm: timing parameter to _STM | |
165 | * | |
166 | * Evaluate _STM with timing parameter @stm. | |
167 | * | |
168 | * LOCKING: | |
169 | * EH context. | |
170 | * | |
171 | * RETURNS: | |
172 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
173 | */ | |
174 | static int ata_acpi_stm(const struct ata_port *ap, struct ata_acpi_gtm *stm) | |
175 | { | |
176 | acpi_status status; | |
177 | struct acpi_object_list input; | |
178 | union acpi_object in_params[3]; | |
179 | ||
180 | in_params[0].type = ACPI_TYPE_BUFFER; | |
181 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
182 | in_params[0].buffer.pointer = (u8 *)stm; | |
183 | /* Buffers for id may need byteswapping ? */ | |
184 | in_params[1].type = ACPI_TYPE_BUFFER; | |
185 | in_params[1].buffer.length = 512; | |
9af5c9c9 | 186 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
64578a3d TH |
187 | in_params[2].type = ACPI_TYPE_BUFFER; |
188 | in_params[2].buffer.length = 512; | |
9af5c9c9 | 189 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
64578a3d TH |
190 | |
191 | input.count = 3; | |
192 | input.pointer = in_params; | |
193 | ||
194 | status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL); | |
195 | ||
196 | if (status == AE_NOT_FOUND) | |
197 | return -ENOENT; | |
198 | if (ACPI_FAILURE(status)) { | |
199 | ata_port_printk(ap, KERN_ERR, | |
200 | "ACPI set timing mode failed (status=0x%x)\n", status); | |
201 | return -EINVAL; | |
202 | } | |
203 | return 0; | |
204 | } | |
205 | ||
11ef697b | 206 | /** |
4700c4bc | 207 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
3a32a8e9 | 208 | * @dev: target ATA device |
4700c4bc TH |
209 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
210 | * @ptr_to_free: pointer which should be freed | |
11ef697b KCA |
211 | * |
212 | * This applies to both PATA and SATA drives. | |
213 | * | |
214 | * The _GTF method has no input parameters. | |
215 | * It returns a variable number of register set values (registers | |
216 | * hex 1F1..1F7, taskfiles). | |
217 | * The <variable number> is not known in advance, so have ACPI-CA | |
218 | * allocate the buffer as needed and return it, then free it later. | |
219 | * | |
4700c4bc TH |
220 | * LOCKING: |
221 | * EH context. | |
222 | * | |
223 | * RETURNS: | |
224 | * Number of taskfiles on success, 0 if _GTF doesn't exist or doesn't | |
225 | * contain valid data. -errno on other errors. | |
11ef697b | 226 | */ |
4700c4bc TH |
227 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf, |
228 | void **ptr_to_free) | |
11ef697b | 229 | { |
9af5c9c9 | 230 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 231 | acpi_status status; |
3a32a8e9 TH |
232 | struct acpi_buffer output; |
233 | union acpi_object *out_obj; | |
4700c4bc | 234 | int rc = 0; |
11ef697b | 235 | |
4700c4bc TH |
236 | /* set up output buffer */ |
237 | output.length = ACPI_ALLOCATE_BUFFER; | |
238 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
11ef697b | 239 | |
11ef697b | 240 | if (ata_msg_probe(ap)) |
3a32a8e9 | 241 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n", |
878d4fed | 242 | __FUNCTION__, ap->port_no); |
11ef697b | 243 | |
11ef697b | 244 | /* _GTF has no input parameters */ |
4700c4bc TH |
245 | status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output); |
246 | ||
11ef697b | 247 | if (ACPI_FAILURE(status)) { |
4700c4bc TH |
248 | if (status != AE_NOT_FOUND) { |
249 | ata_dev_printk(dev, KERN_WARNING, | |
250 | "_GTF evaluation failed (AE 0x%x)\n", | |
251 | status); | |
252 | rc = -EIO; | |
253 | } | |
254 | goto out_free; | |
11ef697b KCA |
255 | } |
256 | ||
257 | if (!output.length || !output.pointer) { | |
258 | if (ata_msg_probe(ap)) | |
3a32a8e9 | 259 | ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: " |
11ef697b KCA |
260 | "length or ptr is NULL (0x%llx, 0x%p)\n", |
261 | __FUNCTION__, | |
262 | (unsigned long long)output.length, | |
263 | output.pointer); | |
4700c4bc | 264 | goto out_free; |
11ef697b KCA |
265 | } |
266 | ||
267 | out_obj = output.pointer; | |
268 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
69b16a5f TH |
269 | ata_dev_printk(dev, KERN_WARNING, |
270 | "_GTF unexpected object type 0x%x\n", | |
271 | out_obj->type); | |
4700c4bc TH |
272 | rc = -EINVAL; |
273 | goto out_free; | |
11ef697b KCA |
274 | } |
275 | ||
4700c4bc | 276 | if (out_obj->buffer.length % REGS_PER_GTF) { |
69b16a5f TH |
277 | ata_dev_printk(dev, KERN_WARNING, |
278 | "unexpected _GTF length (%d)\n", | |
279 | out_obj->buffer.length); | |
4700c4bc TH |
280 | rc = -EINVAL; |
281 | goto out_free; | |
11ef697b KCA |
282 | } |
283 | ||
4700c4bc TH |
284 | *ptr_to_free = out_obj; |
285 | *gtf = (void *)out_obj->buffer.pointer; | |
286 | rc = out_obj->buffer.length / REGS_PER_GTF; | |
287 | ||
11ef697b | 288 | if (ata_msg_probe(ap)) |
3a32a8e9 | 289 | ata_dev_printk(dev, KERN_DEBUG, "%s: returning " |
4700c4bc TH |
290 | "gtf=%p, gtf_count=%d, ptr_to_free=%p\n", |
291 | __FUNCTION__, *gtf, rc, *ptr_to_free); | |
292 | return rc; | |
293 | ||
294 | out_free: | |
295 | kfree(output.pointer); | |
296 | return rc; | |
11ef697b KCA |
297 | } |
298 | ||
299 | /** | |
300 | * taskfile_load_raw - send taskfile registers to host controller | |
3a32a8e9 | 301 | * @dev: target ATA device |
11ef697b KCA |
302 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
303 | * | |
304 | * Outputs ATA taskfile to standard ATA host controller using MMIO | |
305 | * or PIO as indicated by the ATA_FLAG_MMIO flag. | |
306 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. | |
307 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
308 | * hob_lbal, hob_lbam, and hob_lbah. | |
309 | * | |
310 | * This function waits for idle (!BUSY and !DRQ) after writing | |
311 | * registers. If the control register has a new value, this | |
312 | * function also waits for idle after writing control and before | |
313 | * writing the remaining registers. | |
314 | * | |
4700c4bc TH |
315 | * LOCKING: |
316 | * EH context. | |
317 | * | |
318 | * RETURNS: | |
319 | * 0 on success, -errno on failure. | |
11ef697b | 320 | */ |
4700c4bc TH |
321 | static int taskfile_load_raw(struct ata_device *dev, |
322 | const struct ata_acpi_gtf *gtf) | |
11ef697b | 323 | { |
9af5c9c9 | 324 | struct ata_port *ap = dev->link->ap; |
4700c4bc TH |
325 | struct ata_taskfile tf, rtf; |
326 | unsigned int err_mask; | |
fc16c25f | 327 | |
4700c4bc TH |
328 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
329 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
330 | && (gtf->tf[6] == 0)) | |
331 | return 0; | |
11ef697b | 332 | |
3a32a8e9 | 333 | ata_tf_init(dev, &tf); |
fc16c25f JG |
334 | |
335 | /* convert gtf to tf */ | |
336 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; /* TBD */ | |
48be6b18 | 337 | tf.protocol = ATA_PROT_NODATA; |
4700c4bc TH |
338 | tf.feature = gtf->tf[0]; /* 0x1f1 */ |
339 | tf.nsect = gtf->tf[1]; /* 0x1f2 */ | |
340 | tf.lbal = gtf->tf[2]; /* 0x1f3 */ | |
341 | tf.lbam = gtf->tf[3]; /* 0x1f4 */ | |
342 | tf.lbah = gtf->tf[4]; /* 0x1f5 */ | |
343 | tf.device = gtf->tf[5]; /* 0x1f6 */ | |
344 | tf.command = gtf->tf[6]; /* 0x1f7 */ | |
345 | ||
346 | if (ata_msg_probe(ap)) | |
347 | ata_dev_printk(dev, KERN_DEBUG, "executing ACPI cmd " | |
348 | "%02x/%02x:%02x:%02x:%02x:%02x:%02x\n", | |
349 | tf.command, tf.feature, tf.nsect, | |
350 | tf.lbal, tf.lbam, tf.lbah, tf.device); | |
351 | ||
352 | rtf = tf; | |
353 | err_mask = ata_exec_internal(dev, &rtf, NULL, DMA_NONE, NULL, 0); | |
354 | if (err_mask) { | |
3a32a8e9 | 355 | ata_dev_printk(dev, KERN_ERR, |
4700c4bc TH |
356 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x failed " |
357 | "(Emask=0x%x Stat=0x%02x Err=0x%02x)\n", | |
358 | tf.command, tf.feature, tf.nsect, tf.lbal, tf.lbam, | |
359 | tf.lbah, tf.device, err_mask, rtf.command, rtf.feature); | |
360 | return -EIO; | |
361 | } | |
362 | ||
363 | return 0; | |
11ef697b KCA |
364 | } |
365 | ||
11ef697b KCA |
366 | /** |
367 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 368 | * @dev: target ATA device |
11ef697b | 369 | * |
6746544c | 370 | * Evaluate _GTF and excute returned taskfiles. |
69b16a5f TH |
371 | * |
372 | * LOCKING: | |
373 | * EH context. | |
374 | * | |
375 | * RETURNS: | |
6746544c TH |
376 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist or |
377 | * doesn't contain valid data. -errno on other errors. | |
11ef697b | 378 | */ |
6746544c | 379 | static int ata_acpi_exec_tfs(struct ata_device *dev) |
11ef697b | 380 | { |
6746544c TH |
381 | struct ata_acpi_gtf *gtf = NULL; |
382 | void *ptr_to_free = NULL; | |
383 | int gtf_count, i, rc; | |
384 | ||
385 | /* get taskfiles */ | |
386 | rc = ata_dev_get_GTF(dev, >f, &ptr_to_free); | |
387 | if (rc < 0) | |
388 | return rc; | |
389 | gtf_count = rc; | |
390 | ||
391 | /* execute them */ | |
392 | for (i = 0, rc = 0; i < gtf_count; i++) { | |
393 | int tmp; | |
394 | ||
395 | /* ACPI errors are eventually ignored. Run till the | |
396 | * end even after errors. | |
397 | */ | |
398 | tmp = taskfile_load_raw(dev, gtf++); | |
399 | if (!rc) | |
400 | rc = tmp; | |
11ef697b KCA |
401 | } |
402 | ||
6746544c TH |
403 | kfree(ptr_to_free); |
404 | ||
405 | if (rc == 0) | |
406 | return gtf_count; | |
407 | return rc; | |
11ef697b KCA |
408 | } |
409 | ||
7ea1fbc2 KCA |
410 | /** |
411 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 412 | * @dev: target ATA device |
7ea1fbc2 KCA |
413 | * |
414 | * _SDD ACPI object: for SATA mode only | |
415 | * Must be after Identify (Packet) Device -- uses its data | |
416 | * ATM this function never returns a failure. It is an optional | |
417 | * method and if it fails for whatever reason, we should still | |
418 | * just keep going. | |
69b16a5f TH |
419 | * |
420 | * LOCKING: | |
421 | * EH context. | |
422 | * | |
423 | * RETURNS: | |
424 | * 0 on success, -errno on failure. | |
7ea1fbc2 | 425 | */ |
6746544c | 426 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 427 | { |
9af5c9c9 | 428 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 429 | int err; |
3a32a8e9 TH |
430 | acpi_status status; |
431 | struct acpi_object_list input; | |
432 | union acpi_object in_params[1]; | |
7ea1fbc2 | 433 | |
7ea1fbc2 | 434 | if (ata_msg_probe(ap)) |
3a32a8e9 TH |
435 | ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n", |
436 | __FUNCTION__, dev->devno, ap->port_no); | |
7ea1fbc2 | 437 | |
7ea1fbc2 KCA |
438 | /* Give the drive Identify data to the drive via the _SDD method */ |
439 | /* _SDD: set up input parameters */ | |
440 | input.count = 1; | |
441 | input.pointer = in_params; | |
442 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
443 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
444 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
445 | /* Output buffer: _SDD has no output */ |
446 | ||
447 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 448 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
fafbae87 | 449 | status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL); |
3a32a8e9 | 450 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 KCA |
451 | |
452 | err = ACPI_FAILURE(status) ? -EIO : 0; | |
69b16a5f TH |
453 | if (err < 0) |
454 | ata_dev_printk(dev, KERN_WARNING, | |
455 | "ACPI _SDD failed (AE 0x%x)\n", status); | |
7ea1fbc2 | 456 | |
6746544c TH |
457 | return err; |
458 | } | |
459 | ||
64578a3d TH |
460 | /** |
461 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
462 | * @ap: target ATA port | |
463 | * | |
464 | * This function is called when @ap is about to be suspended. All | |
465 | * devices are already put to sleep but the port_suspend() callback | |
466 | * hasn't been executed yet. Error return from this function aborts | |
467 | * suspend. | |
468 | * | |
469 | * LOCKING: | |
470 | * EH context. | |
471 | * | |
472 | * RETURNS: | |
473 | * 0 on success, -errno on failure. | |
474 | */ | |
475 | int ata_acpi_on_suspend(struct ata_port *ap) | |
476 | { | |
477 | unsigned long flags; | |
478 | int rc; | |
479 | ||
480 | /* proceed iff per-port acpi_handle is valid */ | |
481 | if (!ap->acpi_handle) | |
482 | return 0; | |
483 | BUG_ON(ap->flags & ATA_FLAG_ACPI_SATA); | |
484 | ||
485 | /* store timing parameters */ | |
486 | rc = ata_acpi_gtm(ap, &ap->acpi_gtm); | |
487 | ||
488 | spin_lock_irqsave(ap->lock, flags); | |
489 | if (rc == 0) | |
490 | ap->pflags |= ATA_PFLAG_GTM_VALID; | |
491 | else | |
492 | ap->pflags &= ~ATA_PFLAG_GTM_VALID; | |
493 | spin_unlock_irqrestore(ap->lock, flags); | |
494 | ||
495 | if (rc == -ENOENT) | |
496 | rc = 0; | |
497 | return rc; | |
498 | } | |
499 | ||
6746544c TH |
500 | /** |
501 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
502 | * @ap: target ATA port | |
503 | * | |
504 | * This function is called when @ap is resumed - right after port | |
505 | * itself is resumed but before any EH action is taken. | |
506 | * | |
507 | * LOCKING: | |
508 | * EH context. | |
509 | */ | |
510 | void ata_acpi_on_resume(struct ata_port *ap) | |
511 | { | |
512 | int i; | |
513 | ||
64578a3d TH |
514 | if (ap->acpi_handle && (ap->pflags & ATA_PFLAG_GTM_VALID)) { |
515 | BUG_ON(ap->flags & ATA_FLAG_ACPI_SATA); | |
516 | ||
517 | /* restore timing parameters */ | |
518 | ata_acpi_stm(ap, &ap->acpi_gtm); | |
519 | } | |
520 | ||
6746544c TH |
521 | /* schedule _GTF */ |
522 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
9af5c9c9 | 523 | ap->link.device[i].flags |= ATA_DFLAG_ACPI_PENDING; |
7ea1fbc2 KCA |
524 | } |
525 | ||
6746544c TH |
526 | /** |
527 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
528 | * @dev: target ATA device | |
529 | * | |
530 | * This function is called when @dev is about to be configured. | |
531 | * IDENTIFY data might have been modified after this hook is run. | |
532 | * | |
533 | * LOCKING: | |
534 | * EH context. | |
535 | * | |
536 | * RETURNS: | |
537 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
538 | * -errno on failure. | |
539 | */ | |
540 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
541 | { | |
9af5c9c9 TH |
542 | struct ata_port *ap = dev->link->ap; |
543 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
6746544c TH |
544 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
545 | int rc; | |
546 | ||
6746544c TH |
547 | if (!dev->acpi_handle) |
548 | return 0; | |
549 | ||
550 | /* do we need to do _GTF? */ | |
551 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
552 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
553 | return 0; | |
554 | ||
555 | /* do _SDD if SATA */ | |
556 | if (acpi_sata) { | |
557 | rc = ata_acpi_push_id(dev); | |
558 | if (rc) | |
559 | goto acpi_err; | |
560 | } | |
561 | ||
562 | /* do _GTF */ | |
563 | rc = ata_acpi_exec_tfs(dev); | |
564 | if (rc < 0) | |
565 | goto acpi_err; | |
566 | ||
567 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
568 | ||
569 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
570 | if (rc > 0) { | |
571 | rc = ata_dev_reread_id(dev, 0); | |
572 | if (rc < 0) { | |
573 | ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY " | |
574 | "after ACPI commands\n"); | |
575 | return rc; | |
576 | } | |
577 | } | |
578 | ||
579 | return 0; | |
580 | ||
581 | acpi_err: | |
582 | /* let EH retry on the first failure, disable ACPI on the second */ | |
583 | if (dev->flags & ATA_DFLAG_ACPI_FAILED) { | |
584 | ata_dev_printk(dev, KERN_WARNING, "ACPI on devcfg failed the " | |
585 | "second time, disabling (errno=%d)\n", rc); | |
586 | ||
587 | dev->acpi_handle = NULL; | |
588 | ||
589 | /* if port is working, request IDENTIFY reload and continue */ | |
590 | if (!(ap->pflags & ATA_PFLAG_FROZEN)) | |
591 | rc = 1; | |
592 | } | |
593 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
594 | return rc; | |
595 | } |