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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> | |
237d8440 | 17 | #include <scsi/scsi_device.h> |
11ef697b KCA |
18 | #include "libata.h" |
19 | ||
20 | #include <acpi/acpi_bus.h> | |
21 | #include <acpi/acnames.h> | |
22 | #include <acpi/acnamesp.h> | |
23 | #include <acpi/acparser.h> | |
24 | #include <acpi/acexcep.h> | |
25 | #include <acpi/acmacros.h> | |
26 | #include <acpi/actypes.h> | |
27 | ||
11ef697b | 28 | #define NO_PORT_MULT 0xffff |
2dcb407e | 29 | #define SATA_ADR(root, pmp) (((root) << 16) | (pmp)) |
11ef697b KCA |
30 | |
31 | #define REGS_PER_GTF 7 | |
4700c4bc TH |
32 | struct ata_acpi_gtf { |
33 | u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
34 | } __packed; | |
11ef697b | 35 | |
ca426635 AC |
36 | /* |
37 | * Helper - belongs in the PCI layer somewhere eventually | |
38 | */ | |
39 | static int is_pci_dev(struct device *dev) | |
40 | { | |
41 | return (dev->bus == &pci_bus_type); | |
42 | } | |
11ef697b | 43 | |
d0df8b5d TH |
44 | /** |
45 | * ata_acpi_associate_sata_port - associate SATA port with ACPI objects | |
46 | * @ap: target SATA port | |
47 | * | |
48 | * Look up ACPI objects associated with @ap and initialize acpi_handle | |
49 | * fields of @ap, the port and devices accordingly. | |
50 | * | |
51 | * LOCKING: | |
52 | * EH context. | |
53 | * | |
54 | * RETURNS: | |
55 | * 0 on success, -errno on failure. | |
56 | */ | |
57 | void ata_acpi_associate_sata_port(struct ata_port *ap) | |
11ef697b | 58 | { |
d0df8b5d TH |
59 | WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA)); |
60 | ||
61 | if (!ap->nr_pmp_links) { | |
62 | acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT); | |
63 | ||
64 | ap->link.device->acpi_handle = | |
65 | acpi_get_child(ap->host->acpi_handle, adr); | |
66 | } else { | |
67 | struct ata_link *link; | |
68 | ||
69 | ap->link.device->acpi_handle = NULL; | |
70 | ||
71 | ata_port_for_each_link(link, ap) { | |
72 | acpi_integer adr = SATA_ADR(ap->port_no, link->pmp); | |
fafbae87 | 73 | |
d0df8b5d TH |
74 | link->device->acpi_handle = |
75 | acpi_get_child(ap->host->acpi_handle, adr); | |
76 | } | |
77 | } | |
11ef697b KCA |
78 | } |
79 | ||
fafbae87 | 80 | static void ata_acpi_associate_ide_port(struct ata_port *ap) |
11ef697b | 81 | { |
fafbae87 | 82 | int max_devices, i; |
11ef697b | 83 | |
fafbae87 TH |
84 | ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no); |
85 | if (!ap->acpi_handle) | |
86 | return; | |
11ef697b | 87 | |
fafbae87 TH |
88 | max_devices = 1; |
89 | if (ap->flags & ATA_FLAG_SLAVE_POSS) | |
90 | max_devices++; | |
11ef697b | 91 | |
fafbae87 | 92 | for (i = 0; i < max_devices; i++) { |
9af5c9c9 | 93 | struct ata_device *dev = &ap->link.device[i]; |
11ef697b | 94 | |
fafbae87 | 95 | dev->acpi_handle = acpi_get_child(ap->acpi_handle, i); |
11ef697b | 96 | } |
11ef697b KCA |
97 | } |
98 | ||
2dcb407e JG |
99 | static void ata_acpi_handle_hotplug(struct ata_port *ap, struct kobject *kobj, |
100 | u32 event) | |
237d8440 MG |
101 | { |
102 | char event_string[12]; | |
103 | char *envp[] = { event_string, NULL }; | |
104 | struct ata_eh_info *ehi = &ap->link.eh_info; | |
105 | ||
106 | if (event == 0 || event == 1) { | |
107 | unsigned long flags; | |
108 | spin_lock_irqsave(ap->lock, flags); | |
109 | ata_ehi_clear_desc(ehi); | |
110 | ata_ehi_push_desc(ehi, "ACPI event"); | |
111 | ata_ehi_hotplugged(ehi); | |
112 | ata_port_freeze(ap); | |
113 | spin_unlock_irqrestore(ap->lock, flags); | |
114 | } | |
115 | ||
116 | if (kobj) { | |
2dcb407e | 117 | sprintf(event_string, "BAY_EVENT=%d", event); |
237d8440 MG |
118 | kobject_uevent_env(kobj, KOBJ_CHANGE, envp); |
119 | } | |
120 | } | |
121 | ||
122 | static void ata_acpi_dev_notify(acpi_handle handle, u32 event, void *data) | |
123 | { | |
124 | struct ata_device *dev = data; | |
125 | struct kobject *kobj = NULL; | |
126 | ||
127 | if (dev->sdev) | |
128 | kobj = &dev->sdev->sdev_gendev.kobj; | |
129 | ||
2dcb407e | 130 | ata_acpi_handle_hotplug(dev->link->ap, kobj, event); |
237d8440 MG |
131 | } |
132 | ||
133 | static void ata_acpi_ap_notify(acpi_handle handle, u32 event, void *data) | |
134 | { | |
135 | struct ata_port *ap = data; | |
136 | ||
2dcb407e | 137 | ata_acpi_handle_hotplug(ap, &ap->dev->kobj, event); |
237d8440 MG |
138 | } |
139 | ||
fafbae87 TH |
140 | /** |
141 | * ata_acpi_associate - associate ATA host with ACPI objects | |
142 | * @host: target ATA host | |
143 | * | |
144 | * Look up ACPI objects associated with @host and initialize | |
145 | * acpi_handle fields of @host, its ports and devices accordingly. | |
146 | * | |
147 | * LOCKING: | |
148 | * EH context. | |
149 | * | |
150 | * RETURNS: | |
151 | * 0 on success, -errno on failure. | |
152 | */ | |
153 | void ata_acpi_associate(struct ata_host *host) | |
11ef697b | 154 | { |
237d8440 | 155 | int i, j; |
11ef697b | 156 | |
fafbae87 TH |
157 | if (!is_pci_dev(host->dev) || libata_noacpi) |
158 | return; | |
11ef697b | 159 | |
fafbae87 TH |
160 | host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev); |
161 | if (!host->acpi_handle) | |
162 | return; | |
11ef697b | 163 | |
fafbae87 TH |
164 | for (i = 0; i < host->n_ports; i++) { |
165 | struct ata_port *ap = host->ports[i]; | |
166 | ||
167 | if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA) | |
168 | ata_acpi_associate_sata_port(ap); | |
169 | else | |
170 | ata_acpi_associate_ide_port(ap); | |
237d8440 MG |
171 | |
172 | if (ap->acpi_handle) | |
173 | acpi_install_notify_handler (ap->acpi_handle, | |
174 | ACPI_SYSTEM_NOTIFY, | |
175 | ata_acpi_ap_notify, | |
176 | ap); | |
177 | ||
178 | for (j = 0; j < ata_link_max_devices(&ap->link); j++) { | |
179 | struct ata_device *dev = &ap->link.device[j]; | |
180 | ||
181 | if (dev->acpi_handle) | |
182 | acpi_install_notify_handler (dev->acpi_handle, | |
183 | ACPI_SYSTEM_NOTIFY, | |
184 | ata_acpi_dev_notify, | |
185 | dev); | |
186 | } | |
11ef697b | 187 | } |
11ef697b KCA |
188 | } |
189 | ||
64578a3d TH |
190 | /** |
191 | * ata_acpi_gtm - execute _GTM | |
192 | * @ap: target ATA port | |
193 | * @gtm: out parameter for _GTM result | |
194 | * | |
195 | * Evaluate _GTM and store the result in @gtm. | |
196 | * | |
197 | * LOCKING: | |
198 | * EH context. | |
199 | * | |
200 | * RETURNS: | |
201 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
202 | */ | |
badff03d | 203 | int ata_acpi_gtm(const struct ata_port *ap, struct ata_acpi_gtm *gtm) |
64578a3d TH |
204 | { |
205 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
206 | union acpi_object *out_obj; | |
207 | acpi_status status; | |
208 | int rc = 0; | |
209 | ||
210 | status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output); | |
211 | ||
212 | rc = -ENOENT; | |
213 | if (status == AE_NOT_FOUND) | |
214 | goto out_free; | |
215 | ||
216 | rc = -EINVAL; | |
217 | if (ACPI_FAILURE(status)) { | |
218 | ata_port_printk(ap, KERN_ERR, | |
219 | "ACPI get timing mode failed (AE 0x%x)\n", | |
220 | status); | |
221 | goto out_free; | |
222 | } | |
223 | ||
224 | out_obj = output.pointer; | |
225 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
226 | ata_port_printk(ap, KERN_WARNING, | |
227 | "_GTM returned unexpected object type 0x%x\n", | |
228 | out_obj->type); | |
229 | ||
230 | goto out_free; | |
231 | } | |
232 | ||
233 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
234 | ata_port_printk(ap, KERN_ERR, | |
235 | "_GTM returned invalid length %d\n", | |
236 | out_obj->buffer.length); | |
237 | goto out_free; | |
238 | } | |
239 | ||
240 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
241 | rc = 0; | |
242 | out_free: | |
243 | kfree(output.pointer); | |
244 | return rc; | |
245 | } | |
246 | ||
badff03d AC |
247 | EXPORT_SYMBOL_GPL(ata_acpi_gtm); |
248 | ||
64578a3d TH |
249 | /** |
250 | * ata_acpi_stm - execute _STM | |
251 | * @ap: target ATA port | |
252 | * @stm: timing parameter to _STM | |
253 | * | |
254 | * Evaluate _STM with timing parameter @stm. | |
255 | * | |
256 | * LOCKING: | |
257 | * EH context. | |
258 | * | |
259 | * RETURNS: | |
260 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
261 | */ | |
badff03d | 262 | int ata_acpi_stm(const struct ata_port *ap, struct ata_acpi_gtm *stm) |
64578a3d TH |
263 | { |
264 | acpi_status status; | |
265 | struct acpi_object_list input; | |
266 | union acpi_object in_params[3]; | |
267 | ||
268 | in_params[0].type = ACPI_TYPE_BUFFER; | |
269 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
270 | in_params[0].buffer.pointer = (u8 *)stm; | |
271 | /* Buffers for id may need byteswapping ? */ | |
272 | in_params[1].type = ACPI_TYPE_BUFFER; | |
273 | in_params[1].buffer.length = 512; | |
9af5c9c9 | 274 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
64578a3d TH |
275 | in_params[2].type = ACPI_TYPE_BUFFER; |
276 | in_params[2].buffer.length = 512; | |
9af5c9c9 | 277 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
64578a3d TH |
278 | |
279 | input.count = 3; | |
280 | input.pointer = in_params; | |
281 | ||
282 | status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL); | |
283 | ||
284 | if (status == AE_NOT_FOUND) | |
285 | return -ENOENT; | |
286 | if (ACPI_FAILURE(status)) { | |
287 | ata_port_printk(ap, KERN_ERR, | |
288 | "ACPI set timing mode failed (status=0x%x)\n", status); | |
289 | return -EINVAL; | |
290 | } | |
291 | return 0; | |
292 | } | |
293 | ||
badff03d AC |
294 | EXPORT_SYMBOL_GPL(ata_acpi_stm); |
295 | ||
11ef697b | 296 | /** |
4700c4bc | 297 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
3a32a8e9 | 298 | * @dev: target ATA device |
4700c4bc TH |
299 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
300 | * @ptr_to_free: pointer which should be freed | |
11ef697b KCA |
301 | * |
302 | * This applies to both PATA and SATA drives. | |
303 | * | |
304 | * The _GTF method has no input parameters. | |
305 | * It returns a variable number of register set values (registers | |
306 | * hex 1F1..1F7, taskfiles). | |
307 | * The <variable number> is not known in advance, so have ACPI-CA | |
308 | * allocate the buffer as needed and return it, then free it later. | |
309 | * | |
4700c4bc TH |
310 | * LOCKING: |
311 | * EH context. | |
312 | * | |
313 | * RETURNS: | |
314 | * Number of taskfiles on success, 0 if _GTF doesn't exist or doesn't | |
037f6bb7 | 315 | * contain valid data. |
11ef697b | 316 | */ |
4700c4bc TH |
317 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf, |
318 | void **ptr_to_free) | |
11ef697b | 319 | { |
9af5c9c9 | 320 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 321 | acpi_status status; |
3a32a8e9 TH |
322 | struct acpi_buffer output; |
323 | union acpi_object *out_obj; | |
4700c4bc | 324 | int rc = 0; |
11ef697b | 325 | |
4700c4bc TH |
326 | /* set up output buffer */ |
327 | output.length = ACPI_ALLOCATE_BUFFER; | |
328 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
11ef697b | 329 | |
11ef697b | 330 | if (ata_msg_probe(ap)) |
3a32a8e9 | 331 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n", |
878d4fed | 332 | __FUNCTION__, ap->port_no); |
11ef697b | 333 | |
11ef697b | 334 | /* _GTF has no input parameters */ |
4700c4bc TH |
335 | status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output); |
336 | ||
11ef697b | 337 | if (ACPI_FAILURE(status)) { |
4700c4bc TH |
338 | if (status != AE_NOT_FOUND) { |
339 | ata_dev_printk(dev, KERN_WARNING, | |
340 | "_GTF evaluation failed (AE 0x%x)\n", | |
341 | status); | |
4700c4bc TH |
342 | } |
343 | goto out_free; | |
11ef697b KCA |
344 | } |
345 | ||
346 | if (!output.length || !output.pointer) { | |
347 | if (ata_msg_probe(ap)) | |
3a32a8e9 | 348 | ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: " |
11ef697b KCA |
349 | "length or ptr is NULL (0x%llx, 0x%p)\n", |
350 | __FUNCTION__, | |
351 | (unsigned long long)output.length, | |
352 | output.pointer); | |
4700c4bc | 353 | goto out_free; |
11ef697b KCA |
354 | } |
355 | ||
356 | out_obj = output.pointer; | |
357 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
69b16a5f TH |
358 | ata_dev_printk(dev, KERN_WARNING, |
359 | "_GTF unexpected object type 0x%x\n", | |
360 | out_obj->type); | |
4700c4bc | 361 | goto out_free; |
11ef697b KCA |
362 | } |
363 | ||
4700c4bc | 364 | if (out_obj->buffer.length % REGS_PER_GTF) { |
69b16a5f TH |
365 | ata_dev_printk(dev, KERN_WARNING, |
366 | "unexpected _GTF length (%d)\n", | |
367 | out_obj->buffer.length); | |
4700c4bc | 368 | goto out_free; |
11ef697b KCA |
369 | } |
370 | ||
4700c4bc TH |
371 | *ptr_to_free = out_obj; |
372 | *gtf = (void *)out_obj->buffer.pointer; | |
373 | rc = out_obj->buffer.length / REGS_PER_GTF; | |
374 | ||
11ef697b | 375 | if (ata_msg_probe(ap)) |
3a32a8e9 | 376 | ata_dev_printk(dev, KERN_DEBUG, "%s: returning " |
4700c4bc TH |
377 | "gtf=%p, gtf_count=%d, ptr_to_free=%p\n", |
378 | __FUNCTION__, *gtf, rc, *ptr_to_free); | |
379 | return rc; | |
380 | ||
381 | out_free: | |
382 | kfree(output.pointer); | |
383 | return rc; | |
11ef697b KCA |
384 | } |
385 | ||
e1ddb4b6 AC |
386 | /** |
387 | * ata_acpi_cbl_80wire - Check for 80 wire cable | |
388 | * @ap: Port to check | |
389 | * | |
390 | * Return 1 if the ACPI mode data for this port indicates the BIOS selected | |
391 | * an 80wire mode. | |
392 | */ | |
393 | ||
394 | int ata_acpi_cbl_80wire(struct ata_port *ap) | |
395 | { | |
396 | struct ata_acpi_gtm gtm; | |
397 | int valid = 0; | |
2dcb407e | 398 | |
e1ddb4b6 AC |
399 | /* No _GTM data, no information */ |
400 | if (ata_acpi_gtm(ap, >m) < 0) | |
401 | return 0; | |
2dcb407e | 402 | |
e1ddb4b6 AC |
403 | /* Split timing, DMA enabled */ |
404 | if ((gtm.flags & 0x11) == 0x11 && gtm.drive[0].dma < 55) | |
405 | valid |= 1; | |
406 | if ((gtm.flags & 0x14) == 0x14 && gtm.drive[1].dma < 55) | |
407 | valid |= 2; | |
408 | /* Shared timing, DMA enabled */ | |
409 | if ((gtm.flags & 0x11) == 0x01 && gtm.drive[0].dma < 55) | |
410 | valid |= 1; | |
411 | if ((gtm.flags & 0x14) == 0x04 && gtm.drive[0].dma < 55) | |
412 | valid |= 2; | |
413 | ||
414 | /* Drive check */ | |
415 | if ((valid & 1) && ata_dev_enabled(&ap->link.device[0])) | |
416 | return 1; | |
417 | if ((valid & 2) && ata_dev_enabled(&ap->link.device[1])) | |
418 | return 1; | |
419 | return 0; | |
420 | } | |
421 | ||
422 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); | |
423 | ||
11ef697b KCA |
424 | /** |
425 | * taskfile_load_raw - send taskfile registers to host controller | |
3a32a8e9 | 426 | * @dev: target ATA device |
11ef697b KCA |
427 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
428 | * | |
429 | * Outputs ATA taskfile to standard ATA host controller using MMIO | |
430 | * or PIO as indicated by the ATA_FLAG_MMIO flag. | |
431 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. | |
432 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
433 | * hob_lbal, hob_lbam, and hob_lbah. | |
434 | * | |
435 | * This function waits for idle (!BUSY and !DRQ) after writing | |
436 | * registers. If the control register has a new value, this | |
437 | * function also waits for idle after writing control and before | |
438 | * writing the remaining registers. | |
439 | * | |
4700c4bc TH |
440 | * LOCKING: |
441 | * EH context. | |
442 | * | |
443 | * RETURNS: | |
444 | * 0 on success, -errno on failure. | |
11ef697b | 445 | */ |
4700c4bc TH |
446 | static int taskfile_load_raw(struct ata_device *dev, |
447 | const struct ata_acpi_gtf *gtf) | |
11ef697b | 448 | { |
9af5c9c9 | 449 | struct ata_port *ap = dev->link->ap; |
4700c4bc TH |
450 | struct ata_taskfile tf, rtf; |
451 | unsigned int err_mask; | |
fc16c25f | 452 | |
4700c4bc TH |
453 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
454 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
455 | && (gtf->tf[6] == 0)) | |
456 | return 0; | |
11ef697b | 457 | |
3a32a8e9 | 458 | ata_tf_init(dev, &tf); |
fc16c25f JG |
459 | |
460 | /* convert gtf to tf */ | |
461 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; /* TBD */ | |
48be6b18 | 462 | tf.protocol = ATA_PROT_NODATA; |
4700c4bc TH |
463 | tf.feature = gtf->tf[0]; /* 0x1f1 */ |
464 | tf.nsect = gtf->tf[1]; /* 0x1f2 */ | |
465 | tf.lbal = gtf->tf[2]; /* 0x1f3 */ | |
466 | tf.lbam = gtf->tf[3]; /* 0x1f4 */ | |
467 | tf.lbah = gtf->tf[4]; /* 0x1f5 */ | |
468 | tf.device = gtf->tf[5]; /* 0x1f6 */ | |
469 | tf.command = gtf->tf[6]; /* 0x1f7 */ | |
470 | ||
471 | if (ata_msg_probe(ap)) | |
472 | ata_dev_printk(dev, KERN_DEBUG, "executing ACPI cmd " | |
473 | "%02x/%02x:%02x:%02x:%02x:%02x:%02x\n", | |
474 | tf.command, tf.feature, tf.nsect, | |
475 | tf.lbal, tf.lbam, tf.lbah, tf.device); | |
476 | ||
477 | rtf = tf; | |
2b789108 | 478 | err_mask = ata_exec_internal(dev, &rtf, NULL, DMA_NONE, NULL, 0, 0); |
4700c4bc | 479 | if (err_mask) { |
3a32a8e9 | 480 | ata_dev_printk(dev, KERN_ERR, |
4700c4bc TH |
481 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x failed " |
482 | "(Emask=0x%x Stat=0x%02x Err=0x%02x)\n", | |
483 | tf.command, tf.feature, tf.nsect, tf.lbal, tf.lbam, | |
484 | tf.lbah, tf.device, err_mask, rtf.command, rtf.feature); | |
485 | return -EIO; | |
486 | } | |
487 | ||
488 | return 0; | |
11ef697b KCA |
489 | } |
490 | ||
11ef697b KCA |
491 | /** |
492 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 493 | * @dev: target ATA device |
11ef697b | 494 | * |
6746544c | 495 | * Evaluate _GTF and excute returned taskfiles. |
69b16a5f TH |
496 | * |
497 | * LOCKING: | |
498 | * EH context. | |
499 | * | |
500 | * RETURNS: | |
6746544c TH |
501 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist or |
502 | * doesn't contain valid data. -errno on other errors. | |
11ef697b | 503 | */ |
6746544c | 504 | static int ata_acpi_exec_tfs(struct ata_device *dev) |
11ef697b | 505 | { |
6746544c TH |
506 | struct ata_acpi_gtf *gtf = NULL; |
507 | void *ptr_to_free = NULL; | |
508 | int gtf_count, i, rc; | |
509 | ||
510 | /* get taskfiles */ | |
037f6bb7 | 511 | gtf_count = ata_dev_get_GTF(dev, >f, &ptr_to_free); |
6746544c TH |
512 | |
513 | /* execute them */ | |
514 | for (i = 0, rc = 0; i < gtf_count; i++) { | |
515 | int tmp; | |
516 | ||
517 | /* ACPI errors are eventually ignored. Run till the | |
518 | * end even after errors. | |
519 | */ | |
520 | tmp = taskfile_load_raw(dev, gtf++); | |
521 | if (!rc) | |
522 | rc = tmp; | |
11ef697b KCA |
523 | } |
524 | ||
6746544c TH |
525 | kfree(ptr_to_free); |
526 | ||
527 | if (rc == 0) | |
528 | return gtf_count; | |
529 | return rc; | |
11ef697b KCA |
530 | } |
531 | ||
7ea1fbc2 KCA |
532 | /** |
533 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 534 | * @dev: target ATA device |
7ea1fbc2 KCA |
535 | * |
536 | * _SDD ACPI object: for SATA mode only | |
537 | * Must be after Identify (Packet) Device -- uses its data | |
538 | * ATM this function never returns a failure. It is an optional | |
539 | * method and if it fails for whatever reason, we should still | |
540 | * just keep going. | |
69b16a5f TH |
541 | * |
542 | * LOCKING: | |
543 | * EH context. | |
544 | * | |
545 | * RETURNS: | |
546 | * 0 on success, -errno on failure. | |
7ea1fbc2 | 547 | */ |
6746544c | 548 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 549 | { |
9af5c9c9 | 550 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 551 | int err; |
3a32a8e9 TH |
552 | acpi_status status; |
553 | struct acpi_object_list input; | |
554 | union acpi_object in_params[1]; | |
7ea1fbc2 | 555 | |
7ea1fbc2 | 556 | if (ata_msg_probe(ap)) |
3a32a8e9 TH |
557 | ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n", |
558 | __FUNCTION__, dev->devno, ap->port_no); | |
7ea1fbc2 | 559 | |
7ea1fbc2 KCA |
560 | /* Give the drive Identify data to the drive via the _SDD method */ |
561 | /* _SDD: set up input parameters */ | |
562 | input.count = 1; | |
563 | input.pointer = in_params; | |
564 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
565 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
566 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
567 | /* Output buffer: _SDD has no output */ |
568 | ||
569 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 570 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
fafbae87 | 571 | status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL); |
3a32a8e9 | 572 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 KCA |
573 | |
574 | err = ACPI_FAILURE(status) ? -EIO : 0; | |
69b16a5f TH |
575 | if (err < 0) |
576 | ata_dev_printk(dev, KERN_WARNING, | |
577 | "ACPI _SDD failed (AE 0x%x)\n", status); | |
7ea1fbc2 | 578 | |
6746544c TH |
579 | return err; |
580 | } | |
581 | ||
64578a3d TH |
582 | /** |
583 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
584 | * @ap: target ATA port | |
585 | * | |
586 | * This function is called when @ap is about to be suspended. All | |
587 | * devices are already put to sleep but the port_suspend() callback | |
588 | * hasn't been executed yet. Error return from this function aborts | |
589 | * suspend. | |
590 | * | |
591 | * LOCKING: | |
592 | * EH context. | |
593 | * | |
594 | * RETURNS: | |
595 | * 0 on success, -errno on failure. | |
596 | */ | |
597 | int ata_acpi_on_suspend(struct ata_port *ap) | |
598 | { | |
599 | unsigned long flags; | |
600 | int rc; | |
601 | ||
602 | /* proceed iff per-port acpi_handle is valid */ | |
603 | if (!ap->acpi_handle) | |
604 | return 0; | |
605 | BUG_ON(ap->flags & ATA_FLAG_ACPI_SATA); | |
606 | ||
607 | /* store timing parameters */ | |
608 | rc = ata_acpi_gtm(ap, &ap->acpi_gtm); | |
609 | ||
610 | spin_lock_irqsave(ap->lock, flags); | |
611 | if (rc == 0) | |
612 | ap->pflags |= ATA_PFLAG_GTM_VALID; | |
613 | else | |
614 | ap->pflags &= ~ATA_PFLAG_GTM_VALID; | |
615 | spin_unlock_irqrestore(ap->lock, flags); | |
616 | ||
617 | if (rc == -ENOENT) | |
618 | rc = 0; | |
619 | return rc; | |
620 | } | |
621 | ||
6746544c TH |
622 | /** |
623 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
624 | * @ap: target ATA port | |
625 | * | |
626 | * This function is called when @ap is resumed - right after port | |
627 | * itself is resumed but before any EH action is taken. | |
628 | * | |
629 | * LOCKING: | |
630 | * EH context. | |
631 | */ | |
632 | void ata_acpi_on_resume(struct ata_port *ap) | |
633 | { | |
f58229f8 | 634 | struct ata_device *dev; |
6746544c | 635 | |
64578a3d TH |
636 | if (ap->acpi_handle && (ap->pflags & ATA_PFLAG_GTM_VALID)) { |
637 | BUG_ON(ap->flags & ATA_FLAG_ACPI_SATA); | |
638 | ||
639 | /* restore timing parameters */ | |
640 | ata_acpi_stm(ap, &ap->acpi_gtm); | |
641 | } | |
642 | ||
6746544c | 643 | /* schedule _GTF */ |
f58229f8 TH |
644 | ata_link_for_each_dev(dev, &ap->link) |
645 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
7ea1fbc2 KCA |
646 | } |
647 | ||
6746544c TH |
648 | /** |
649 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
650 | * @dev: target ATA device | |
651 | * | |
652 | * This function is called when @dev is about to be configured. | |
653 | * IDENTIFY data might have been modified after this hook is run. | |
654 | * | |
655 | * LOCKING: | |
656 | * EH context. | |
657 | * | |
658 | * RETURNS: | |
659 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
660 | * -errno on failure. | |
661 | */ | |
662 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
663 | { | |
9af5c9c9 TH |
664 | struct ata_port *ap = dev->link->ap; |
665 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
6746544c TH |
666 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
667 | int rc; | |
668 | ||
6746544c TH |
669 | if (!dev->acpi_handle) |
670 | return 0; | |
671 | ||
672 | /* do we need to do _GTF? */ | |
673 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
674 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
675 | return 0; | |
676 | ||
677 | /* do _SDD if SATA */ | |
678 | if (acpi_sata) { | |
679 | rc = ata_acpi_push_id(dev); | |
680 | if (rc) | |
681 | goto acpi_err; | |
682 | } | |
683 | ||
684 | /* do _GTF */ | |
685 | rc = ata_acpi_exec_tfs(dev); | |
686 | if (rc < 0) | |
687 | goto acpi_err; | |
688 | ||
689 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
690 | ||
691 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
692 | if (rc > 0) { | |
693 | rc = ata_dev_reread_id(dev, 0); | |
694 | if (rc < 0) { | |
695 | ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY " | |
696 | "after ACPI commands\n"); | |
697 | return rc; | |
698 | } | |
699 | } | |
700 | ||
701 | return 0; | |
702 | ||
703 | acpi_err: | |
704 | /* let EH retry on the first failure, disable ACPI on the second */ | |
705 | if (dev->flags & ATA_DFLAG_ACPI_FAILED) { | |
706 | ata_dev_printk(dev, KERN_WARNING, "ACPI on devcfg failed the " | |
707 | "second time, disabling (errno=%d)\n", rc); | |
708 | ||
709 | dev->acpi_handle = NULL; | |
710 | ||
711 | /* if port is working, request IDENTIFY reload and continue */ | |
712 | if (!(ap->pflags & ATA_PFLAG_FROZEN)) | |
713 | rc = 1; | |
714 | } | |
715 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
716 | return rc; | |
717 | } |