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Commit | Line | Data |
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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 | |
d0df8b5d TH |
43 | /** |
44 | * ata_acpi_associate_sata_port - associate SATA port with ACPI objects | |
45 | * @ap: target SATA port | |
46 | * | |
47 | * Look up ACPI objects associated with @ap and initialize acpi_handle | |
48 | * fields of @ap, the port and devices accordingly. | |
49 | * | |
50 | * LOCKING: | |
51 | * EH context. | |
52 | * | |
53 | * RETURNS: | |
54 | * 0 on success, -errno on failure. | |
55 | */ | |
56 | void ata_acpi_associate_sata_port(struct ata_port *ap) | |
11ef697b | 57 | { |
d0df8b5d TH |
58 | WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA)); |
59 | ||
60 | if (!ap->nr_pmp_links) { | |
61 | acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT); | |
62 | ||
63 | ap->link.device->acpi_handle = | |
64 | acpi_get_child(ap->host->acpi_handle, adr); | |
65 | } else { | |
66 | struct ata_link *link; | |
67 | ||
68 | ap->link.device->acpi_handle = NULL; | |
69 | ||
70 | ata_port_for_each_link(link, ap) { | |
71 | acpi_integer adr = SATA_ADR(ap->port_no, link->pmp); | |
fafbae87 | 72 | |
d0df8b5d TH |
73 | link->device->acpi_handle = |
74 | acpi_get_child(ap->host->acpi_handle, adr); | |
75 | } | |
76 | } | |
11ef697b KCA |
77 | } |
78 | ||
fafbae87 | 79 | static void ata_acpi_associate_ide_port(struct ata_port *ap) |
11ef697b | 80 | { |
fafbae87 | 81 | int max_devices, i; |
11ef697b | 82 | |
fafbae87 TH |
83 | ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no); |
84 | if (!ap->acpi_handle) | |
85 | return; | |
11ef697b | 86 | |
fafbae87 TH |
87 | max_devices = 1; |
88 | if (ap->flags & ATA_FLAG_SLAVE_POSS) | |
89 | max_devices++; | |
11ef697b | 90 | |
fafbae87 | 91 | for (i = 0; i < max_devices; i++) { |
9af5c9c9 | 92 | struct ata_device *dev = &ap->link.device[i]; |
11ef697b | 93 | |
fafbae87 | 94 | dev->acpi_handle = acpi_get_child(ap->acpi_handle, i); |
11ef697b | 95 | } |
11ef697b KCA |
96 | } |
97 | ||
fafbae87 TH |
98 | /** |
99 | * ata_acpi_associate - associate ATA host with ACPI objects | |
100 | * @host: target ATA host | |
101 | * | |
102 | * Look up ACPI objects associated with @host and initialize | |
103 | * acpi_handle fields of @host, its ports and devices accordingly. | |
104 | * | |
105 | * LOCKING: | |
106 | * EH context. | |
107 | * | |
108 | * RETURNS: | |
109 | * 0 on success, -errno on failure. | |
110 | */ | |
111 | void ata_acpi_associate(struct ata_host *host) | |
11ef697b | 112 | { |
fafbae87 | 113 | int i; |
11ef697b | 114 | |
fafbae87 TH |
115 | if (!is_pci_dev(host->dev) || libata_noacpi) |
116 | return; | |
11ef697b | 117 | |
fafbae87 TH |
118 | host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev); |
119 | if (!host->acpi_handle) | |
120 | return; | |
11ef697b | 121 | |
fafbae87 TH |
122 | for (i = 0; i < host->n_ports; i++) { |
123 | struct ata_port *ap = host->ports[i]; | |
124 | ||
125 | if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA) | |
126 | ata_acpi_associate_sata_port(ap); | |
127 | else | |
128 | ata_acpi_associate_ide_port(ap); | |
11ef697b | 129 | } |
11ef697b KCA |
130 | } |
131 | ||
64578a3d TH |
132 | /** |
133 | * ata_acpi_gtm - execute _GTM | |
134 | * @ap: target ATA port | |
135 | * @gtm: out parameter for _GTM result | |
136 | * | |
137 | * Evaluate _GTM and store the result in @gtm. | |
138 | * | |
139 | * LOCKING: | |
140 | * EH context. | |
141 | * | |
142 | * RETURNS: | |
143 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
144 | */ | |
145 | static int ata_acpi_gtm(const struct ata_port *ap, struct ata_acpi_gtm *gtm) | |
146 | { | |
147 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
148 | union acpi_object *out_obj; | |
149 | acpi_status status; | |
150 | int rc = 0; | |
151 | ||
152 | status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output); | |
153 | ||
154 | rc = -ENOENT; | |
155 | if (status == AE_NOT_FOUND) | |
156 | goto out_free; | |
157 | ||
158 | rc = -EINVAL; | |
159 | if (ACPI_FAILURE(status)) { | |
160 | ata_port_printk(ap, KERN_ERR, | |
161 | "ACPI get timing mode failed (AE 0x%x)\n", | |
162 | status); | |
163 | goto out_free; | |
164 | } | |
165 | ||
166 | out_obj = output.pointer; | |
167 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
168 | ata_port_printk(ap, KERN_WARNING, | |
169 | "_GTM returned unexpected object type 0x%x\n", | |
170 | out_obj->type); | |
171 | ||
172 | goto out_free; | |
173 | } | |
174 | ||
175 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
176 | ata_port_printk(ap, KERN_ERR, | |
177 | "_GTM returned invalid length %d\n", | |
178 | out_obj->buffer.length); | |
179 | goto out_free; | |
180 | } | |
181 | ||
182 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
183 | rc = 0; | |
184 | out_free: | |
185 | kfree(output.pointer); | |
186 | return rc; | |
187 | } | |
188 | ||
189 | /** | |
190 | * ata_acpi_stm - execute _STM | |
191 | * @ap: target ATA port | |
192 | * @stm: timing parameter to _STM | |
193 | * | |
194 | * Evaluate _STM with timing parameter @stm. | |
195 | * | |
196 | * LOCKING: | |
197 | * EH context. | |
198 | * | |
199 | * RETURNS: | |
200 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
201 | */ | |
202 | static int ata_acpi_stm(const struct ata_port *ap, struct ata_acpi_gtm *stm) | |
203 | { | |
204 | acpi_status status; | |
205 | struct acpi_object_list input; | |
206 | union acpi_object in_params[3]; | |
207 | ||
208 | in_params[0].type = ACPI_TYPE_BUFFER; | |
209 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
210 | in_params[0].buffer.pointer = (u8 *)stm; | |
211 | /* Buffers for id may need byteswapping ? */ | |
212 | in_params[1].type = ACPI_TYPE_BUFFER; | |
213 | in_params[1].buffer.length = 512; | |
9af5c9c9 | 214 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
64578a3d TH |
215 | in_params[2].type = ACPI_TYPE_BUFFER; |
216 | in_params[2].buffer.length = 512; | |
9af5c9c9 | 217 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
64578a3d TH |
218 | |
219 | input.count = 3; | |
220 | input.pointer = in_params; | |
221 | ||
222 | status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL); | |
223 | ||
224 | if (status == AE_NOT_FOUND) | |
225 | return -ENOENT; | |
226 | if (ACPI_FAILURE(status)) { | |
227 | ata_port_printk(ap, KERN_ERR, | |
228 | "ACPI set timing mode failed (status=0x%x)\n", status); | |
229 | return -EINVAL; | |
230 | } | |
231 | return 0; | |
232 | } | |
233 | ||
11ef697b | 234 | /** |
4700c4bc | 235 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
3a32a8e9 | 236 | * @dev: target ATA device |
4700c4bc TH |
237 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
238 | * @ptr_to_free: pointer which should be freed | |
11ef697b KCA |
239 | * |
240 | * This applies to both PATA and SATA drives. | |
241 | * | |
242 | * The _GTF method has no input parameters. | |
243 | * It returns a variable number of register set values (registers | |
244 | * hex 1F1..1F7, taskfiles). | |
245 | * The <variable number> is not known in advance, so have ACPI-CA | |
246 | * allocate the buffer as needed and return it, then free it later. | |
247 | * | |
4700c4bc TH |
248 | * LOCKING: |
249 | * EH context. | |
250 | * | |
251 | * RETURNS: | |
252 | * Number of taskfiles on success, 0 if _GTF doesn't exist or doesn't | |
253 | * contain valid data. -errno on other errors. | |
11ef697b | 254 | */ |
4700c4bc TH |
255 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf, |
256 | void **ptr_to_free) | |
11ef697b | 257 | { |
9af5c9c9 | 258 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 259 | acpi_status status; |
3a32a8e9 TH |
260 | struct acpi_buffer output; |
261 | union acpi_object *out_obj; | |
4700c4bc | 262 | int rc = 0; |
11ef697b | 263 | |
4700c4bc TH |
264 | /* set up output buffer */ |
265 | output.length = ACPI_ALLOCATE_BUFFER; | |
266 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
11ef697b | 267 | |
11ef697b | 268 | if (ata_msg_probe(ap)) |
3a32a8e9 | 269 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n", |
878d4fed | 270 | __FUNCTION__, ap->port_no); |
11ef697b | 271 | |
11ef697b | 272 | /* _GTF has no input parameters */ |
4700c4bc TH |
273 | status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output); |
274 | ||
11ef697b | 275 | if (ACPI_FAILURE(status)) { |
4700c4bc TH |
276 | if (status != AE_NOT_FOUND) { |
277 | ata_dev_printk(dev, KERN_WARNING, | |
278 | "_GTF evaluation failed (AE 0x%x)\n", | |
279 | status); | |
280 | rc = -EIO; | |
281 | } | |
282 | goto out_free; | |
11ef697b KCA |
283 | } |
284 | ||
285 | if (!output.length || !output.pointer) { | |
286 | if (ata_msg_probe(ap)) | |
3a32a8e9 | 287 | ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: " |
11ef697b KCA |
288 | "length or ptr is NULL (0x%llx, 0x%p)\n", |
289 | __FUNCTION__, | |
290 | (unsigned long long)output.length, | |
291 | output.pointer); | |
4700c4bc | 292 | goto out_free; |
11ef697b KCA |
293 | } |
294 | ||
295 | out_obj = output.pointer; | |
296 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
69b16a5f TH |
297 | ata_dev_printk(dev, KERN_WARNING, |
298 | "_GTF unexpected object type 0x%x\n", | |
299 | out_obj->type); | |
4700c4bc TH |
300 | rc = -EINVAL; |
301 | goto out_free; | |
11ef697b KCA |
302 | } |
303 | ||
4700c4bc | 304 | if (out_obj->buffer.length % REGS_PER_GTF) { |
69b16a5f TH |
305 | ata_dev_printk(dev, KERN_WARNING, |
306 | "unexpected _GTF length (%d)\n", | |
307 | out_obj->buffer.length); | |
4700c4bc TH |
308 | rc = -EINVAL; |
309 | goto out_free; | |
11ef697b KCA |
310 | } |
311 | ||
4700c4bc TH |
312 | *ptr_to_free = out_obj; |
313 | *gtf = (void *)out_obj->buffer.pointer; | |
314 | rc = out_obj->buffer.length / REGS_PER_GTF; | |
315 | ||
11ef697b | 316 | if (ata_msg_probe(ap)) |
3a32a8e9 | 317 | ata_dev_printk(dev, KERN_DEBUG, "%s: returning " |
4700c4bc TH |
318 | "gtf=%p, gtf_count=%d, ptr_to_free=%p\n", |
319 | __FUNCTION__, *gtf, rc, *ptr_to_free); | |
320 | return rc; | |
321 | ||
322 | out_free: | |
323 | kfree(output.pointer); | |
324 | return rc; | |
11ef697b KCA |
325 | } |
326 | ||
e1ddb4b6 AC |
327 | /** |
328 | * ata_acpi_cbl_80wire - Check for 80 wire cable | |
329 | * @ap: Port to check | |
330 | * | |
331 | * Return 1 if the ACPI mode data for this port indicates the BIOS selected | |
332 | * an 80wire mode. | |
333 | */ | |
334 | ||
335 | int ata_acpi_cbl_80wire(struct ata_port *ap) | |
336 | { | |
337 | struct ata_acpi_gtm gtm; | |
338 | int valid = 0; | |
339 | ||
340 | /* No _GTM data, no information */ | |
341 | if (ata_acpi_gtm(ap, >m) < 0) | |
342 | return 0; | |
343 | ||
344 | /* Split timing, DMA enabled */ | |
345 | if ((gtm.flags & 0x11) == 0x11 && gtm.drive[0].dma < 55) | |
346 | valid |= 1; | |
347 | if ((gtm.flags & 0x14) == 0x14 && gtm.drive[1].dma < 55) | |
348 | valid |= 2; | |
349 | /* Shared timing, DMA enabled */ | |
350 | if ((gtm.flags & 0x11) == 0x01 && gtm.drive[0].dma < 55) | |
351 | valid |= 1; | |
352 | if ((gtm.flags & 0x14) == 0x04 && gtm.drive[0].dma < 55) | |
353 | valid |= 2; | |
354 | ||
355 | /* Drive check */ | |
356 | if ((valid & 1) && ata_dev_enabled(&ap->link.device[0])) | |
357 | return 1; | |
358 | if ((valid & 2) && ata_dev_enabled(&ap->link.device[1])) | |
359 | return 1; | |
360 | return 0; | |
361 | } | |
362 | ||
363 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); | |
364 | ||
11ef697b KCA |
365 | /** |
366 | * taskfile_load_raw - send taskfile registers to host controller | |
3a32a8e9 | 367 | * @dev: target ATA device |
11ef697b KCA |
368 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
369 | * | |
370 | * Outputs ATA taskfile to standard ATA host controller using MMIO | |
371 | * or PIO as indicated by the ATA_FLAG_MMIO flag. | |
372 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. | |
373 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
374 | * hob_lbal, hob_lbam, and hob_lbah. | |
375 | * | |
376 | * This function waits for idle (!BUSY and !DRQ) after writing | |
377 | * registers. If the control register has a new value, this | |
378 | * function also waits for idle after writing control and before | |
379 | * writing the remaining registers. | |
380 | * | |
4700c4bc TH |
381 | * LOCKING: |
382 | * EH context. | |
383 | * | |
384 | * RETURNS: | |
385 | * 0 on success, -errno on failure. | |
11ef697b | 386 | */ |
4700c4bc TH |
387 | static int taskfile_load_raw(struct ata_device *dev, |
388 | const struct ata_acpi_gtf *gtf) | |
11ef697b | 389 | { |
9af5c9c9 | 390 | struct ata_port *ap = dev->link->ap; |
4700c4bc TH |
391 | struct ata_taskfile tf, rtf; |
392 | unsigned int err_mask; | |
fc16c25f | 393 | |
4700c4bc TH |
394 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
395 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
396 | && (gtf->tf[6] == 0)) | |
397 | return 0; | |
11ef697b | 398 | |
3a32a8e9 | 399 | ata_tf_init(dev, &tf); |
fc16c25f JG |
400 | |
401 | /* convert gtf to tf */ | |
402 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; /* TBD */ | |
48be6b18 | 403 | tf.protocol = ATA_PROT_NODATA; |
4700c4bc TH |
404 | tf.feature = gtf->tf[0]; /* 0x1f1 */ |
405 | tf.nsect = gtf->tf[1]; /* 0x1f2 */ | |
406 | tf.lbal = gtf->tf[2]; /* 0x1f3 */ | |
407 | tf.lbam = gtf->tf[3]; /* 0x1f4 */ | |
408 | tf.lbah = gtf->tf[4]; /* 0x1f5 */ | |
409 | tf.device = gtf->tf[5]; /* 0x1f6 */ | |
410 | tf.command = gtf->tf[6]; /* 0x1f7 */ | |
411 | ||
412 | if (ata_msg_probe(ap)) | |
413 | ata_dev_printk(dev, KERN_DEBUG, "executing ACPI cmd " | |
414 | "%02x/%02x:%02x:%02x:%02x:%02x:%02x\n", | |
415 | tf.command, tf.feature, tf.nsect, | |
416 | tf.lbal, tf.lbam, tf.lbah, tf.device); | |
417 | ||
418 | rtf = tf; | |
419 | err_mask = ata_exec_internal(dev, &rtf, NULL, DMA_NONE, NULL, 0); | |
420 | if (err_mask) { | |
3a32a8e9 | 421 | ata_dev_printk(dev, KERN_ERR, |
4700c4bc TH |
422 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x failed " |
423 | "(Emask=0x%x Stat=0x%02x Err=0x%02x)\n", | |
424 | tf.command, tf.feature, tf.nsect, tf.lbal, tf.lbam, | |
425 | tf.lbah, tf.device, err_mask, rtf.command, rtf.feature); | |
426 | return -EIO; | |
427 | } | |
428 | ||
429 | return 0; | |
11ef697b KCA |
430 | } |
431 | ||
11ef697b KCA |
432 | /** |
433 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 434 | * @dev: target ATA device |
11ef697b | 435 | * |
6746544c | 436 | * Evaluate _GTF and excute returned taskfiles. |
69b16a5f TH |
437 | * |
438 | * LOCKING: | |
439 | * EH context. | |
440 | * | |
441 | * RETURNS: | |
6746544c TH |
442 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist or |
443 | * doesn't contain valid data. -errno on other errors. | |
11ef697b | 444 | */ |
6746544c | 445 | static int ata_acpi_exec_tfs(struct ata_device *dev) |
11ef697b | 446 | { |
6746544c TH |
447 | struct ata_acpi_gtf *gtf = NULL; |
448 | void *ptr_to_free = NULL; | |
449 | int gtf_count, i, rc; | |
450 | ||
451 | /* get taskfiles */ | |
452 | rc = ata_dev_get_GTF(dev, >f, &ptr_to_free); | |
453 | if (rc < 0) | |
454 | return rc; | |
455 | gtf_count = rc; | |
456 | ||
457 | /* execute them */ | |
458 | for (i = 0, rc = 0; i < gtf_count; i++) { | |
459 | int tmp; | |
460 | ||
461 | /* ACPI errors are eventually ignored. Run till the | |
462 | * end even after errors. | |
463 | */ | |
464 | tmp = taskfile_load_raw(dev, gtf++); | |
465 | if (!rc) | |
466 | rc = tmp; | |
11ef697b KCA |
467 | } |
468 | ||
6746544c TH |
469 | kfree(ptr_to_free); |
470 | ||
471 | if (rc == 0) | |
472 | return gtf_count; | |
473 | return rc; | |
11ef697b KCA |
474 | } |
475 | ||
7ea1fbc2 KCA |
476 | /** |
477 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 478 | * @dev: target ATA device |
7ea1fbc2 KCA |
479 | * |
480 | * _SDD ACPI object: for SATA mode only | |
481 | * Must be after Identify (Packet) Device -- uses its data | |
482 | * ATM this function never returns a failure. It is an optional | |
483 | * method and if it fails for whatever reason, we should still | |
484 | * just keep going. | |
69b16a5f TH |
485 | * |
486 | * LOCKING: | |
487 | * EH context. | |
488 | * | |
489 | * RETURNS: | |
490 | * 0 on success, -errno on failure. | |
7ea1fbc2 | 491 | */ |
6746544c | 492 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 493 | { |
9af5c9c9 | 494 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 495 | int err; |
3a32a8e9 TH |
496 | acpi_status status; |
497 | struct acpi_object_list input; | |
498 | union acpi_object in_params[1]; | |
7ea1fbc2 | 499 | |
7ea1fbc2 | 500 | if (ata_msg_probe(ap)) |
3a32a8e9 TH |
501 | ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n", |
502 | __FUNCTION__, dev->devno, ap->port_no); | |
7ea1fbc2 | 503 | |
7ea1fbc2 KCA |
504 | /* Give the drive Identify data to the drive via the _SDD method */ |
505 | /* _SDD: set up input parameters */ | |
506 | input.count = 1; | |
507 | input.pointer = in_params; | |
508 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
509 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
510 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
511 | /* Output buffer: _SDD has no output */ |
512 | ||
513 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 514 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
fafbae87 | 515 | status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL); |
3a32a8e9 | 516 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 KCA |
517 | |
518 | err = ACPI_FAILURE(status) ? -EIO : 0; | |
69b16a5f TH |
519 | if (err < 0) |
520 | ata_dev_printk(dev, KERN_WARNING, | |
521 | "ACPI _SDD failed (AE 0x%x)\n", status); | |
7ea1fbc2 | 522 | |
6746544c TH |
523 | return err; |
524 | } | |
525 | ||
64578a3d TH |
526 | /** |
527 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
528 | * @ap: target ATA port | |
529 | * | |
530 | * This function is called when @ap is about to be suspended. All | |
531 | * devices are already put to sleep but the port_suspend() callback | |
532 | * hasn't been executed yet. Error return from this function aborts | |
533 | * suspend. | |
534 | * | |
535 | * LOCKING: | |
536 | * EH context. | |
537 | * | |
538 | * RETURNS: | |
539 | * 0 on success, -errno on failure. | |
540 | */ | |
541 | int ata_acpi_on_suspend(struct ata_port *ap) | |
542 | { | |
543 | unsigned long flags; | |
544 | int rc; | |
545 | ||
546 | /* proceed iff per-port acpi_handle is valid */ | |
547 | if (!ap->acpi_handle) | |
548 | return 0; | |
549 | BUG_ON(ap->flags & ATA_FLAG_ACPI_SATA); | |
550 | ||
551 | /* store timing parameters */ | |
552 | rc = ata_acpi_gtm(ap, &ap->acpi_gtm); | |
553 | ||
554 | spin_lock_irqsave(ap->lock, flags); | |
555 | if (rc == 0) | |
556 | ap->pflags |= ATA_PFLAG_GTM_VALID; | |
557 | else | |
558 | ap->pflags &= ~ATA_PFLAG_GTM_VALID; | |
559 | spin_unlock_irqrestore(ap->lock, flags); | |
560 | ||
561 | if (rc == -ENOENT) | |
562 | rc = 0; | |
563 | return rc; | |
564 | } | |
565 | ||
6746544c TH |
566 | /** |
567 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
568 | * @ap: target ATA port | |
569 | * | |
570 | * This function is called when @ap is resumed - right after port | |
571 | * itself is resumed but before any EH action is taken. | |
572 | * | |
573 | * LOCKING: | |
574 | * EH context. | |
575 | */ | |
576 | void ata_acpi_on_resume(struct ata_port *ap) | |
577 | { | |
f58229f8 | 578 | struct ata_device *dev; |
6746544c | 579 | |
64578a3d TH |
580 | if (ap->acpi_handle && (ap->pflags & ATA_PFLAG_GTM_VALID)) { |
581 | BUG_ON(ap->flags & ATA_FLAG_ACPI_SATA); | |
582 | ||
583 | /* restore timing parameters */ | |
584 | ata_acpi_stm(ap, &ap->acpi_gtm); | |
585 | } | |
586 | ||
6746544c | 587 | /* schedule _GTF */ |
f58229f8 TH |
588 | ata_link_for_each_dev(dev, &ap->link) |
589 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
7ea1fbc2 KCA |
590 | } |
591 | ||
6746544c TH |
592 | /** |
593 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
594 | * @dev: target ATA device | |
595 | * | |
596 | * This function is called when @dev is about to be configured. | |
597 | * IDENTIFY data might have been modified after this hook is run. | |
598 | * | |
599 | * LOCKING: | |
600 | * EH context. | |
601 | * | |
602 | * RETURNS: | |
603 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
604 | * -errno on failure. | |
605 | */ | |
606 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
607 | { | |
9af5c9c9 TH |
608 | struct ata_port *ap = dev->link->ap; |
609 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
6746544c TH |
610 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
611 | int rc; | |
612 | ||
6746544c TH |
613 | if (!dev->acpi_handle) |
614 | return 0; | |
615 | ||
616 | /* do we need to do _GTF? */ | |
617 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
618 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
619 | return 0; | |
620 | ||
621 | /* do _SDD if SATA */ | |
622 | if (acpi_sata) { | |
623 | rc = ata_acpi_push_id(dev); | |
624 | if (rc) | |
625 | goto acpi_err; | |
626 | } | |
627 | ||
628 | /* do _GTF */ | |
629 | rc = ata_acpi_exec_tfs(dev); | |
630 | if (rc < 0) | |
631 | goto acpi_err; | |
632 | ||
633 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
634 | ||
635 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
636 | if (rc > 0) { | |
637 | rc = ata_dev_reread_id(dev, 0); | |
638 | if (rc < 0) { | |
639 | ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY " | |
640 | "after ACPI commands\n"); | |
641 | return rc; | |
642 | } | |
643 | } | |
644 | ||
645 | return 0; | |
646 | ||
647 | acpi_err: | |
648 | /* let EH retry on the first failure, disable ACPI on the second */ | |
649 | if (dev->flags & ATA_DFLAG_ACPI_FAILED) { | |
650 | ata_dev_printk(dev, KERN_WARNING, "ACPI on devcfg failed the " | |
651 | "second time, disabling (errno=%d)\n", rc); | |
652 | ||
653 | dev->acpi_handle = NULL; | |
654 | ||
655 | /* if port is working, request IDENTIFY reload and continue */ | |
656 | if (!(ap->pflags & ATA_PFLAG_FROZEN)) | |
657 | rc = 1; | |
658 | } | |
659 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
660 | return rc; | |
661 | } |