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 | ||
3264a8d8 | 9 | #include <linux/module.h> |
11ef697b KCA |
10 | #include <linux/ata.h> |
11 | #include <linux/delay.h> | |
12 | #include <linux/device.h> | |
13 | #include <linux/errno.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/acpi.h> | |
16 | #include <linux/libata.h> | |
17 | #include <linux/pci.h> | |
237d8440 | 18 | #include <scsi/scsi_device.h> |
11ef697b KCA |
19 | #include "libata.h" |
20 | ||
21 | #include <acpi/acpi_bus.h> | |
22 | #include <acpi/acnames.h> | |
23 | #include <acpi/acnamesp.h> | |
24 | #include <acpi/acparser.h> | |
25 | #include <acpi/acexcep.h> | |
26 | #include <acpi/acmacros.h> | |
27 | #include <acpi/actypes.h> | |
28 | ||
3264a8d8 TH |
29 | enum { |
30 | ATA_ACPI_FILTER_SETXFER = 1 << 0, | |
31 | ATA_ACPI_FILTER_LOCK = 1 << 1, | |
32 | ||
33 | ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER | | |
34 | ATA_ACPI_FILTER_LOCK, | |
35 | }; | |
36 | ||
37 | static unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT; | |
38 | module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644); | |
39 | MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock)"); | |
40 | ||
11ef697b | 41 | #define NO_PORT_MULT 0xffff |
2dcb407e | 42 | #define SATA_ADR(root, pmp) (((root) << 16) | (pmp)) |
11ef697b KCA |
43 | |
44 | #define REGS_PER_GTF 7 | |
4700c4bc TH |
45 | struct ata_acpi_gtf { |
46 | u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
47 | } __packed; | |
11ef697b | 48 | |
ca426635 AC |
49 | /* |
50 | * Helper - belongs in the PCI layer somewhere eventually | |
51 | */ | |
52 | static int is_pci_dev(struct device *dev) | |
53 | { | |
54 | return (dev->bus == &pci_bus_type); | |
55 | } | |
11ef697b | 56 | |
398e0782 TH |
57 | static void ata_acpi_clear_gtf(struct ata_device *dev) |
58 | { | |
59 | kfree(dev->gtf_cache); | |
60 | dev->gtf_cache = NULL; | |
61 | } | |
62 | ||
d0df8b5d TH |
63 | /** |
64 | * ata_acpi_associate_sata_port - associate SATA port with ACPI objects | |
65 | * @ap: target SATA port | |
66 | * | |
67 | * Look up ACPI objects associated with @ap and initialize acpi_handle | |
68 | * fields of @ap, the port and devices accordingly. | |
69 | * | |
70 | * LOCKING: | |
71 | * EH context. | |
72 | * | |
73 | * RETURNS: | |
74 | * 0 on success, -errno on failure. | |
75 | */ | |
76 | void ata_acpi_associate_sata_port(struct ata_port *ap) | |
11ef697b | 77 | { |
d0df8b5d TH |
78 | WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA)); |
79 | ||
071f44b1 | 80 | if (!sata_pmp_attached(ap)) { |
d0df8b5d TH |
81 | acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT); |
82 | ||
83 | ap->link.device->acpi_handle = | |
84 | acpi_get_child(ap->host->acpi_handle, adr); | |
85 | } else { | |
86 | struct ata_link *link; | |
87 | ||
88 | ap->link.device->acpi_handle = NULL; | |
89 | ||
90 | ata_port_for_each_link(link, ap) { | |
91 | acpi_integer adr = SATA_ADR(ap->port_no, link->pmp); | |
fafbae87 | 92 | |
d0df8b5d TH |
93 | link->device->acpi_handle = |
94 | acpi_get_child(ap->host->acpi_handle, adr); | |
95 | } | |
96 | } | |
11ef697b KCA |
97 | } |
98 | ||
fafbae87 | 99 | static void ata_acpi_associate_ide_port(struct ata_port *ap) |
11ef697b | 100 | { |
fafbae87 | 101 | int max_devices, i; |
11ef697b | 102 | |
fafbae87 TH |
103 | ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no); |
104 | if (!ap->acpi_handle) | |
105 | return; | |
11ef697b | 106 | |
fafbae87 TH |
107 | max_devices = 1; |
108 | if (ap->flags & ATA_FLAG_SLAVE_POSS) | |
109 | max_devices++; | |
11ef697b | 110 | |
fafbae87 | 111 | for (i = 0; i < max_devices; i++) { |
9af5c9c9 | 112 | struct ata_device *dev = &ap->link.device[i]; |
11ef697b | 113 | |
fafbae87 | 114 | dev->acpi_handle = acpi_get_child(ap->acpi_handle, i); |
11ef697b | 115 | } |
c05e6ff0 TH |
116 | |
117 | if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0) | |
118 | ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; | |
11ef697b KCA |
119 | } |
120 | ||
233f1120 | 121 | static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev, |
2dcb407e | 122 | u32 event) |
237d8440 MG |
123 | { |
124 | char event_string[12]; | |
125 | char *envp[] = { event_string, NULL }; | |
233f1120 TH |
126 | struct ata_eh_info *ehi; |
127 | struct kobject *kobj = NULL; | |
128 | int wait = 0; | |
129 | unsigned long flags; | |
130 | ||
131 | if (!ap) | |
132 | ap = dev->link->ap; | |
133 | ehi = &ap->link.eh_info; | |
134 | ||
135 | spin_lock_irqsave(ap->lock, flags); | |
136 | ||
137 | switch (event) { | |
138 | case ACPI_NOTIFY_BUS_CHECK: | |
139 | case ACPI_NOTIFY_DEVICE_CHECK: | |
140 | ata_ehi_push_desc(ehi, "ACPI event"); | |
141 | ata_ehi_hotplugged(ehi); | |
142 | ata_port_freeze(ap); | |
143 | break; | |
144 | ||
145 | case ACPI_NOTIFY_EJECT_REQUEST: | |
146 | ata_ehi_push_desc(ehi, "ACPI event"); | |
147 | if (dev) | |
148 | dev->flags |= ATA_DFLAG_DETACH; | |
149 | else { | |
150 | struct ata_link *tlink; | |
151 | struct ata_device *tdev; | |
152 | ||
153 | ata_port_for_each_link(tlink, ap) | |
154 | ata_link_for_each_dev(tdev, tlink) | |
155 | tdev->flags |= ATA_DFLAG_DETACH; | |
156 | } | |
157 | ||
158 | ata_port_schedule_eh(ap); | |
159 | wait = 1; | |
160 | break; | |
237d8440 MG |
161 | } |
162 | ||
233f1120 TH |
163 | if (dev) { |
164 | if (dev->sdev) | |
165 | kobj = &dev->sdev->sdev_gendev.kobj; | |
166 | } else | |
167 | kobj = &ap->dev->kobj; | |
168 | ||
237d8440 | 169 | if (kobj) { |
2dcb407e | 170 | sprintf(event_string, "BAY_EVENT=%d", event); |
237d8440 MG |
171 | kobject_uevent_env(kobj, KOBJ_CHANGE, envp); |
172 | } | |
233f1120 TH |
173 | |
174 | spin_unlock_irqrestore(ap->lock, flags); | |
175 | ||
176 | if (wait) | |
177 | ata_port_wait_eh(ap); | |
237d8440 MG |
178 | } |
179 | ||
180 | static void ata_acpi_dev_notify(acpi_handle handle, u32 event, void *data) | |
181 | { | |
182 | struct ata_device *dev = data; | |
237d8440 | 183 | |
233f1120 | 184 | ata_acpi_handle_hotplug(NULL, dev, event); |
237d8440 MG |
185 | } |
186 | ||
187 | static void ata_acpi_ap_notify(acpi_handle handle, u32 event, void *data) | |
188 | { | |
189 | struct ata_port *ap = data; | |
190 | ||
233f1120 | 191 | ata_acpi_handle_hotplug(ap, NULL, event); |
237d8440 MG |
192 | } |
193 | ||
fafbae87 TH |
194 | /** |
195 | * ata_acpi_associate - associate ATA host with ACPI objects | |
196 | * @host: target ATA host | |
197 | * | |
198 | * Look up ACPI objects associated with @host and initialize | |
199 | * acpi_handle fields of @host, its ports and devices accordingly. | |
200 | * | |
201 | * LOCKING: | |
202 | * EH context. | |
203 | * | |
204 | * RETURNS: | |
205 | * 0 on success, -errno on failure. | |
206 | */ | |
207 | void ata_acpi_associate(struct ata_host *host) | |
11ef697b | 208 | { |
237d8440 | 209 | int i, j; |
11ef697b | 210 | |
fafbae87 TH |
211 | if (!is_pci_dev(host->dev) || libata_noacpi) |
212 | return; | |
11ef697b | 213 | |
fafbae87 TH |
214 | host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev); |
215 | if (!host->acpi_handle) | |
216 | return; | |
11ef697b | 217 | |
fafbae87 TH |
218 | for (i = 0; i < host->n_ports; i++) { |
219 | struct ata_port *ap = host->ports[i]; | |
220 | ||
221 | if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA) | |
222 | ata_acpi_associate_sata_port(ap); | |
223 | else | |
224 | ata_acpi_associate_ide_port(ap); | |
237d8440 | 225 | |
233f1120 TH |
226 | if (ap->acpi_handle) { |
227 | acpi_install_notify_handler(ap->acpi_handle, | |
228 | ACPI_SYSTEM_NOTIFY, | |
229 | ata_acpi_ap_notify, ap); | |
233f1120 TH |
230 | /* we might be on a docking station */ |
231 | register_hotplug_dock_device(ap->acpi_handle, | |
232 | ata_acpi_ap_notify, ap); | |
233f1120 | 233 | } |
237d8440 MG |
234 | |
235 | for (j = 0; j < ata_link_max_devices(&ap->link); j++) { | |
236 | struct ata_device *dev = &ap->link.device[j]; | |
237 | ||
233f1120 TH |
238 | if (dev->acpi_handle) { |
239 | acpi_install_notify_handler(dev->acpi_handle, | |
240 | ACPI_SYSTEM_NOTIFY, | |
241 | ata_acpi_dev_notify, dev); | |
233f1120 TH |
242 | /* we might be on a docking station */ |
243 | register_hotplug_dock_device(dev->acpi_handle, | |
244 | ata_acpi_dev_notify, dev); | |
233f1120 | 245 | } |
237d8440 | 246 | } |
11ef697b | 247 | } |
11ef697b KCA |
248 | } |
249 | ||
562f0c2d TH |
250 | /** |
251 | * ata_acpi_dissociate - dissociate ATA host from ACPI objects | |
252 | * @host: target ATA host | |
253 | * | |
254 | * This function is called during driver detach after the whole host | |
255 | * is shut down. | |
256 | * | |
257 | * LOCKING: | |
258 | * EH context. | |
259 | */ | |
260 | void ata_acpi_dissociate(struct ata_host *host) | |
261 | { | |
c05e6ff0 TH |
262 | int i; |
263 | ||
264 | /* Restore initial _GTM values so that driver which attaches | |
265 | * afterward can use them too. | |
266 | */ | |
267 | for (i = 0; i < host->n_ports; i++) { | |
268 | struct ata_port *ap = host->ports[i]; | |
269 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); | |
270 | ||
271 | if (ap->acpi_handle && gtm) | |
272 | ata_acpi_stm(ap, gtm); | |
273 | } | |
562f0c2d TH |
274 | } |
275 | ||
64578a3d TH |
276 | /** |
277 | * ata_acpi_gtm - execute _GTM | |
278 | * @ap: target ATA port | |
279 | * @gtm: out parameter for _GTM result | |
280 | * | |
281 | * Evaluate _GTM and store the result in @gtm. | |
282 | * | |
283 | * LOCKING: | |
284 | * EH context. | |
285 | * | |
286 | * RETURNS: | |
287 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
288 | */ | |
0d02f0b2 | 289 | int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) |
64578a3d TH |
290 | { |
291 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
292 | union acpi_object *out_obj; | |
293 | acpi_status status; | |
294 | int rc = 0; | |
295 | ||
296 | status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output); | |
297 | ||
298 | rc = -ENOENT; | |
299 | if (status == AE_NOT_FOUND) | |
300 | goto out_free; | |
301 | ||
302 | rc = -EINVAL; | |
303 | if (ACPI_FAILURE(status)) { | |
304 | ata_port_printk(ap, KERN_ERR, | |
305 | "ACPI get timing mode failed (AE 0x%x)\n", | |
306 | status); | |
307 | goto out_free; | |
308 | } | |
309 | ||
310 | out_obj = output.pointer; | |
311 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
312 | ata_port_printk(ap, KERN_WARNING, | |
313 | "_GTM returned unexpected object type 0x%x\n", | |
314 | out_obj->type); | |
315 | ||
316 | goto out_free; | |
317 | } | |
318 | ||
319 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
320 | ata_port_printk(ap, KERN_ERR, | |
321 | "_GTM returned invalid length %d\n", | |
322 | out_obj->buffer.length); | |
323 | goto out_free; | |
324 | } | |
325 | ||
326 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
327 | rc = 0; | |
328 | out_free: | |
329 | kfree(output.pointer); | |
330 | return rc; | |
331 | } | |
332 | ||
badff03d AC |
333 | EXPORT_SYMBOL_GPL(ata_acpi_gtm); |
334 | ||
64578a3d TH |
335 | /** |
336 | * ata_acpi_stm - execute _STM | |
337 | * @ap: target ATA port | |
338 | * @stm: timing parameter to _STM | |
339 | * | |
340 | * Evaluate _STM with timing parameter @stm. | |
341 | * | |
342 | * LOCKING: | |
343 | * EH context. | |
344 | * | |
345 | * RETURNS: | |
346 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
347 | */ | |
0d02f0b2 | 348 | int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm) |
64578a3d TH |
349 | { |
350 | acpi_status status; | |
0d02f0b2 | 351 | struct ata_acpi_gtm stm_buf = *stm; |
64578a3d TH |
352 | struct acpi_object_list input; |
353 | union acpi_object in_params[3]; | |
354 | ||
355 | in_params[0].type = ACPI_TYPE_BUFFER; | |
356 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
0d02f0b2 | 357 | in_params[0].buffer.pointer = (u8 *)&stm_buf; |
64578a3d TH |
358 | /* Buffers for id may need byteswapping ? */ |
359 | in_params[1].type = ACPI_TYPE_BUFFER; | |
360 | in_params[1].buffer.length = 512; | |
9af5c9c9 | 361 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
64578a3d TH |
362 | in_params[2].type = ACPI_TYPE_BUFFER; |
363 | in_params[2].buffer.length = 512; | |
9af5c9c9 | 364 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
64578a3d TH |
365 | |
366 | input.count = 3; | |
367 | input.pointer = in_params; | |
368 | ||
369 | status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL); | |
370 | ||
371 | if (status == AE_NOT_FOUND) | |
372 | return -ENOENT; | |
373 | if (ACPI_FAILURE(status)) { | |
374 | ata_port_printk(ap, KERN_ERR, | |
375 | "ACPI set timing mode failed (status=0x%x)\n", status); | |
376 | return -EINVAL; | |
377 | } | |
378 | return 0; | |
379 | } | |
380 | ||
badff03d AC |
381 | EXPORT_SYMBOL_GPL(ata_acpi_stm); |
382 | ||
11ef697b | 383 | /** |
4700c4bc | 384 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
3a32a8e9 | 385 | * @dev: target ATA device |
4700c4bc | 386 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
11ef697b KCA |
387 | * |
388 | * This applies to both PATA and SATA drives. | |
389 | * | |
390 | * The _GTF method has no input parameters. | |
391 | * It returns a variable number of register set values (registers | |
392 | * hex 1F1..1F7, taskfiles). | |
393 | * The <variable number> is not known in advance, so have ACPI-CA | |
394 | * allocate the buffer as needed and return it, then free it later. | |
395 | * | |
4700c4bc TH |
396 | * LOCKING: |
397 | * EH context. | |
398 | * | |
399 | * RETURNS: | |
66fa7f21 TH |
400 | * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL |
401 | * if _GTF is invalid. | |
11ef697b | 402 | */ |
398e0782 | 403 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) |
11ef697b | 404 | { |
9af5c9c9 | 405 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 406 | acpi_status status; |
3a32a8e9 TH |
407 | struct acpi_buffer output; |
408 | union acpi_object *out_obj; | |
4700c4bc | 409 | int rc = 0; |
11ef697b | 410 | |
398e0782 TH |
411 | /* if _GTF is cached, use the cached value */ |
412 | if (dev->gtf_cache) { | |
413 | out_obj = dev->gtf_cache; | |
414 | goto done; | |
415 | } | |
416 | ||
4700c4bc TH |
417 | /* set up output buffer */ |
418 | output.length = ACPI_ALLOCATE_BUFFER; | |
419 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
11ef697b | 420 | |
11ef697b | 421 | if (ata_msg_probe(ap)) |
3a32a8e9 | 422 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n", |
7f5e4e8d | 423 | __func__, ap->port_no); |
11ef697b | 424 | |
11ef697b | 425 | /* _GTF has no input parameters */ |
4700c4bc | 426 | status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output); |
398e0782 | 427 | out_obj = dev->gtf_cache = output.pointer; |
4700c4bc | 428 | |
11ef697b | 429 | if (ACPI_FAILURE(status)) { |
4700c4bc TH |
430 | if (status != AE_NOT_FOUND) { |
431 | ata_dev_printk(dev, KERN_WARNING, | |
432 | "_GTF evaluation failed (AE 0x%x)\n", | |
433 | status); | |
66fa7f21 | 434 | rc = -EINVAL; |
4700c4bc TH |
435 | } |
436 | goto out_free; | |
11ef697b KCA |
437 | } |
438 | ||
439 | if (!output.length || !output.pointer) { | |
440 | if (ata_msg_probe(ap)) | |
3a32a8e9 | 441 | ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: " |
11ef697b | 442 | "length or ptr is NULL (0x%llx, 0x%p)\n", |
7f5e4e8d | 443 | __func__, |
11ef697b KCA |
444 | (unsigned long long)output.length, |
445 | output.pointer); | |
66fa7f21 | 446 | rc = -EINVAL; |
4700c4bc | 447 | goto out_free; |
11ef697b KCA |
448 | } |
449 | ||
11ef697b | 450 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
69b16a5f TH |
451 | ata_dev_printk(dev, KERN_WARNING, |
452 | "_GTF unexpected object type 0x%x\n", | |
453 | out_obj->type); | |
66fa7f21 | 454 | rc = -EINVAL; |
4700c4bc | 455 | goto out_free; |
11ef697b KCA |
456 | } |
457 | ||
4700c4bc | 458 | if (out_obj->buffer.length % REGS_PER_GTF) { |
69b16a5f TH |
459 | ata_dev_printk(dev, KERN_WARNING, |
460 | "unexpected _GTF length (%d)\n", | |
461 | out_obj->buffer.length); | |
66fa7f21 | 462 | rc = -EINVAL; |
4700c4bc | 463 | goto out_free; |
11ef697b KCA |
464 | } |
465 | ||
398e0782 | 466 | done: |
4700c4bc | 467 | rc = out_obj->buffer.length / REGS_PER_GTF; |
398e0782 TH |
468 | if (gtf) { |
469 | *gtf = (void *)out_obj->buffer.pointer; | |
470 | if (ata_msg_probe(ap)) | |
471 | ata_dev_printk(dev, KERN_DEBUG, | |
472 | "%s: returning gtf=%p, gtf_count=%d\n", | |
7f5e4e8d | 473 | __func__, *gtf, rc); |
398e0782 | 474 | } |
4700c4bc TH |
475 | return rc; |
476 | ||
477 | out_free: | |
398e0782 | 478 | ata_acpi_clear_gtf(dev); |
4700c4bc | 479 | return rc; |
11ef697b KCA |
480 | } |
481 | ||
7c77fa4d TH |
482 | /** |
483 | * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter | |
484 | * @dev: target device | |
485 | * @gtm: GTM parameter to use | |
486 | * | |
487 | * Determine xfermask for @dev from @gtm. | |
488 | * | |
489 | * LOCKING: | |
490 | * None. | |
491 | * | |
492 | * RETURNS: | |
493 | * Determined xfermask. | |
494 | */ | |
495 | unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, | |
496 | const struct ata_acpi_gtm *gtm) | |
497 | { | |
a0f79b92 TH |
498 | unsigned long xfer_mask = 0; |
499 | unsigned int type; | |
500 | int unit; | |
501 | u8 mode; | |
7c77fa4d TH |
502 | |
503 | /* we always use the 0 slot for crap hardware */ | |
504 | unit = dev->devno; | |
505 | if (!(gtm->flags & 0x10)) | |
506 | unit = 0; | |
507 | ||
a0f79b92 TH |
508 | /* PIO */ |
509 | mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); | |
510 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d TH |
511 | |
512 | /* See if we have MWDMA or UDMA data. We don't bother with | |
513 | * MWDMA if UDMA is available as this means the BIOS set UDMA | |
514 | * and our error changedown if it works is UDMA to PIO anyway. | |
515 | */ | |
a0f79b92 TH |
516 | if (!(gtm->flags & (1 << (2 * unit)))) |
517 | type = ATA_SHIFT_MWDMA; | |
518 | else | |
519 | type = ATA_SHIFT_UDMA; | |
520 | ||
521 | mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); | |
522 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d | 523 | |
a0f79b92 | 524 | return xfer_mask; |
7c77fa4d TH |
525 | } |
526 | EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); | |
527 | ||
e1ddb4b6 AC |
528 | /** |
529 | * ata_acpi_cbl_80wire - Check for 80 wire cable | |
530 | * @ap: Port to check | |
021ee9a6 | 531 | * @gtm: GTM data to use |
e1ddb4b6 | 532 | * |
021ee9a6 | 533 | * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. |
e1ddb4b6 | 534 | */ |
021ee9a6 | 535 | int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) |
e1ddb4b6 | 536 | { |
021ee9a6 TH |
537 | struct ata_device *dev; |
538 | ||
539 | ata_link_for_each_dev(dev, &ap->link) { | |
540 | unsigned long xfer_mask, udma_mask; | |
541 | ||
542 | if (!ata_dev_enabled(dev)) | |
543 | continue; | |
544 | ||
545 | xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); | |
546 | ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); | |
547 | ||
548 | if (udma_mask & ~ATA_UDMA_MASK_40C) | |
549 | return 1; | |
550 | } | |
551 | ||
e1ddb4b6 AC |
552 | return 0; |
553 | } | |
e1ddb4b6 AC |
554 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); |
555 | ||
3264a8d8 TH |
556 | static void ata_acpi_gtf_to_tf(struct ata_device *dev, |
557 | const struct ata_acpi_gtf *gtf, | |
558 | struct ata_taskfile *tf) | |
559 | { | |
560 | ata_tf_init(dev, tf); | |
561 | ||
562 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
563 | tf->protocol = ATA_PROT_NODATA; | |
564 | tf->feature = gtf->tf[0]; /* 0x1f1 */ | |
565 | tf->nsect = gtf->tf[1]; /* 0x1f2 */ | |
566 | tf->lbal = gtf->tf[2]; /* 0x1f3 */ | |
567 | tf->lbam = gtf->tf[3]; /* 0x1f4 */ | |
568 | tf->lbah = gtf->tf[4]; /* 0x1f5 */ | |
569 | tf->device = gtf->tf[5]; /* 0x1f6 */ | |
570 | tf->command = gtf->tf[6]; /* 0x1f7 */ | |
571 | } | |
572 | ||
573 | static int ata_acpi_filter_tf(const struct ata_taskfile *tf, | |
574 | const struct ata_taskfile *ptf) | |
575 | { | |
576 | if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_SETXFER) { | |
577 | /* libata doesn't use ACPI to configure transfer mode. | |
578 | * It will only confuse device configuration. Skip. | |
579 | */ | |
580 | if (tf->command == ATA_CMD_SET_FEATURES && | |
581 | tf->feature == SETFEATURES_XFER) | |
582 | return 1; | |
583 | } | |
584 | ||
585 | if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_LOCK) { | |
586 | /* BIOS writers, sorry but we don't wanna lock | |
587 | * features unless the user explicitly said so. | |
588 | */ | |
589 | ||
590 | /* DEVICE CONFIGURATION FREEZE LOCK */ | |
591 | if (tf->command == ATA_CMD_CONF_OVERLAY && | |
592 | tf->feature == ATA_DCO_FREEZE_LOCK) | |
593 | return 1; | |
594 | ||
595 | /* SECURITY FREEZE LOCK */ | |
596 | if (tf->command == ATA_CMD_SEC_FREEZE_LOCK) | |
597 | return 1; | |
598 | ||
599 | /* SET MAX LOCK and SET MAX FREEZE LOCK */ | |
600 | if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) && | |
601 | tf->command == ATA_CMD_SET_MAX && | |
602 | (tf->feature == ATA_SET_MAX_LOCK || | |
603 | tf->feature == ATA_SET_MAX_FREEZE_LOCK)) | |
604 | return 1; | |
605 | } | |
606 | ||
607 | return 0; | |
608 | } | |
609 | ||
11ef697b | 610 | /** |
0e8634bf | 611 | * ata_acpi_run_tf - send taskfile registers to host controller |
3a32a8e9 | 612 | * @dev: target ATA device |
11ef697b KCA |
613 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
614 | * | |
615 | * Outputs ATA taskfile to standard ATA host controller using MMIO | |
616 | * or PIO as indicated by the ATA_FLAG_MMIO flag. | |
617 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. | |
618 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
619 | * hob_lbal, hob_lbam, and hob_lbah. | |
620 | * | |
621 | * This function waits for idle (!BUSY and !DRQ) after writing | |
622 | * registers. If the control register has a new value, this | |
623 | * function also waits for idle after writing control and before | |
624 | * writing the remaining registers. | |
625 | * | |
4700c4bc TH |
626 | * LOCKING: |
627 | * EH context. | |
628 | * | |
629 | * RETURNS: | |
3264a8d8 TH |
630 | * 1 if command is executed successfully. 0 if ignored, rejected or |
631 | * filtered out, -errno on other errors. | |
11ef697b | 632 | */ |
0e8634bf | 633 | static int ata_acpi_run_tf(struct ata_device *dev, |
3264a8d8 TH |
634 | const struct ata_acpi_gtf *gtf, |
635 | const struct ata_acpi_gtf *prev_gtf) | |
11ef697b | 636 | { |
3264a8d8 TH |
637 | struct ata_taskfile *pptf = NULL; |
638 | struct ata_taskfile tf, ptf, rtf; | |
4700c4bc | 639 | unsigned int err_mask; |
0e8634bf TH |
640 | const char *level; |
641 | char msg[60]; | |
642 | int rc; | |
fc16c25f | 643 | |
4700c4bc TH |
644 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
645 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
646 | && (gtf->tf[6] == 0)) | |
647 | return 0; | |
11ef697b | 648 | |
3264a8d8 TH |
649 | ata_acpi_gtf_to_tf(dev, gtf, &tf); |
650 | if (prev_gtf) { | |
651 | ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); | |
652 | pptf = &ptf; | |
653 | } | |
654 | ||
655 | if (!ata_acpi_filter_tf(&tf, pptf)) { | |
656 | rtf = tf; | |
657 | err_mask = ata_exec_internal(dev, &rtf, NULL, | |
658 | DMA_NONE, NULL, 0, 0); | |
659 | ||
660 | switch (err_mask) { | |
661 | case 0: | |
662 | level = KERN_DEBUG; | |
663 | snprintf(msg, sizeof(msg), "succeeded"); | |
664 | rc = 1; | |
665 | break; | |
666 | ||
667 | case AC_ERR_DEV: | |
668 | level = KERN_INFO; | |
669 | snprintf(msg, sizeof(msg), | |
670 | "rejected by device (Stat=0x%02x Err=0x%02x)", | |
671 | rtf.command, rtf.feature); | |
672 | rc = 0; | |
673 | break; | |
674 | ||
675 | default: | |
676 | level = KERN_ERR; | |
677 | snprintf(msg, sizeof(msg), | |
678 | "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", | |
679 | err_mask, rtf.command, rtf.feature); | |
680 | rc = -EIO; | |
681 | break; | |
682 | } | |
683 | } else { | |
0e8634bf | 684 | level = KERN_INFO; |
3264a8d8 | 685 | snprintf(msg, sizeof(msg), "filtered out"); |
0e8634bf | 686 | rc = 0; |
4700c4bc TH |
687 | } |
688 | ||
0e8634bf TH |
689 | ata_dev_printk(dev, level, |
690 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x %s\n", | |
691 | tf.command, tf.feature, tf.nsect, tf.lbal, | |
692 | tf.lbam, tf.lbah, tf.device, msg); | |
693 | ||
694 | return rc; | |
11ef697b KCA |
695 | } |
696 | ||
11ef697b KCA |
697 | /** |
698 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 699 | * @dev: target ATA device |
66fa7f21 | 700 | * @nr_executed: out paramter for the number of executed commands |
11ef697b | 701 | * |
6746544c | 702 | * Evaluate _GTF and excute returned taskfiles. |
69b16a5f TH |
703 | * |
704 | * LOCKING: | |
705 | * EH context. | |
706 | * | |
707 | * RETURNS: | |
66fa7f21 TH |
708 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist. |
709 | * -errno on other errors. | |
11ef697b | 710 | */ |
66fa7f21 | 711 | static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) |
11ef697b | 712 | { |
3264a8d8 | 713 | struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL; |
6746544c TH |
714 | int gtf_count, i, rc; |
715 | ||
716 | /* get taskfiles */ | |
66fa7f21 TH |
717 | rc = ata_dev_get_GTF(dev, >f); |
718 | if (rc < 0) | |
719 | return rc; | |
720 | gtf_count = rc; | |
6746544c TH |
721 | |
722 | /* execute them */ | |
3264a8d8 TH |
723 | for (i = 0; i < gtf_count; i++, gtf++) { |
724 | rc = ata_acpi_run_tf(dev, gtf, pgtf); | |
0e8634bf TH |
725 | if (rc < 0) |
726 | break; | |
3264a8d8 | 727 | if (rc) { |
0e8634bf | 728 | (*nr_executed)++; |
3264a8d8 TH |
729 | pgtf = gtf; |
730 | } | |
11ef697b KCA |
731 | } |
732 | ||
398e0782 | 733 | ata_acpi_clear_gtf(dev); |
6746544c | 734 | |
0e8634bf TH |
735 | if (rc < 0) |
736 | return rc; | |
737 | return 0; | |
11ef697b KCA |
738 | } |
739 | ||
7ea1fbc2 KCA |
740 | /** |
741 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 742 | * @dev: target ATA device |
7ea1fbc2 KCA |
743 | * |
744 | * _SDD ACPI object: for SATA mode only | |
745 | * Must be after Identify (Packet) Device -- uses its data | |
746 | * ATM this function never returns a failure. It is an optional | |
747 | * method and if it fails for whatever reason, we should still | |
748 | * just keep going. | |
69b16a5f TH |
749 | * |
750 | * LOCKING: | |
751 | * EH context. | |
752 | * | |
753 | * RETURNS: | |
754 | * 0 on success, -errno on failure. | |
7ea1fbc2 | 755 | */ |
6746544c | 756 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 757 | { |
9af5c9c9 | 758 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 759 | int err; |
3a32a8e9 TH |
760 | acpi_status status; |
761 | struct acpi_object_list input; | |
762 | union acpi_object in_params[1]; | |
7ea1fbc2 | 763 | |
7ea1fbc2 | 764 | if (ata_msg_probe(ap)) |
3a32a8e9 | 765 | ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n", |
7f5e4e8d | 766 | __func__, dev->devno, ap->port_no); |
7ea1fbc2 | 767 | |
7ea1fbc2 KCA |
768 | /* Give the drive Identify data to the drive via the _SDD method */ |
769 | /* _SDD: set up input parameters */ | |
770 | input.count = 1; | |
771 | input.pointer = in_params; | |
772 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
773 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
774 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
775 | /* Output buffer: _SDD has no output */ |
776 | ||
777 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 778 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
fafbae87 | 779 | status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL); |
3a32a8e9 | 780 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 KCA |
781 | |
782 | err = ACPI_FAILURE(status) ? -EIO : 0; | |
69b16a5f TH |
783 | if (err < 0) |
784 | ata_dev_printk(dev, KERN_WARNING, | |
785 | "ACPI _SDD failed (AE 0x%x)\n", status); | |
7ea1fbc2 | 786 | |
6746544c TH |
787 | return err; |
788 | } | |
789 | ||
64578a3d TH |
790 | /** |
791 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
792 | * @ap: target ATA port | |
793 | * | |
794 | * This function is called when @ap is about to be suspended. All | |
795 | * devices are already put to sleep but the port_suspend() callback | |
796 | * hasn't been executed yet. Error return from this function aborts | |
797 | * suspend. | |
798 | * | |
799 | * LOCKING: | |
800 | * EH context. | |
801 | * | |
802 | * RETURNS: | |
803 | * 0 on success, -errno on failure. | |
804 | */ | |
805 | int ata_acpi_on_suspend(struct ata_port *ap) | |
806 | { | |
c05e6ff0 TH |
807 | /* nada */ |
808 | return 0; | |
64578a3d TH |
809 | } |
810 | ||
6746544c TH |
811 | /** |
812 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
813 | * @ap: target ATA port | |
814 | * | |
815 | * This function is called when @ap is resumed - right after port | |
816 | * itself is resumed but before any EH action is taken. | |
817 | * | |
818 | * LOCKING: | |
819 | * EH context. | |
820 | */ | |
821 | void ata_acpi_on_resume(struct ata_port *ap) | |
822 | { | |
c05e6ff0 | 823 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
f58229f8 | 824 | struct ata_device *dev; |
6746544c | 825 | |
398e0782 TH |
826 | if (ap->acpi_handle && gtm) { |
827 | /* _GTM valid */ | |
828 | ||
829 | /* restore timing parameters */ | |
c05e6ff0 | 830 | ata_acpi_stm(ap, gtm); |
64578a3d | 831 | |
398e0782 TH |
832 | /* _GTF should immediately follow _STM so that it can |
833 | * use values set by _STM. Cache _GTF result and | |
834 | * schedule _GTF. | |
835 | */ | |
836 | ata_link_for_each_dev(dev, &ap->link) { | |
837 | ata_acpi_clear_gtf(dev); | |
48feb3c4 SL |
838 | if (ata_dev_enabled(dev) && |
839 | ata_dev_get_GTF(dev, NULL) >= 0) | |
398e0782 TH |
840 | dev->flags |= ATA_DFLAG_ACPI_PENDING; |
841 | } | |
842 | } else { | |
843 | /* SATA _GTF needs to be evaulated after _SDD and | |
844 | * there's no reason to evaluate IDE _GTF early | |
845 | * without _STM. Clear cache and schedule _GTF. | |
846 | */ | |
847 | ata_link_for_each_dev(dev, &ap->link) { | |
848 | ata_acpi_clear_gtf(dev); | |
48feb3c4 SL |
849 | if (ata_dev_enabled(dev)) |
850 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
398e0782 TH |
851 | } |
852 | } | |
7ea1fbc2 KCA |
853 | } |
854 | ||
bd3adca5 SL |
855 | /** |
856 | * ata_acpi_set_state - set the port power state | |
857 | * @ap: target ATA port | |
858 | * @state: state, on/off | |
859 | * | |
860 | * This function executes the _PS0/_PS3 ACPI method to set the power state. | |
861 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off | |
862 | */ | |
863 | void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
864 | { | |
865 | struct ata_device *dev; | |
866 | ||
867 | if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA)) | |
868 | return; | |
869 | ||
870 | /* channel first and then drives for power on and vica versa | |
871 | for power off */ | |
872 | if (state.event == PM_EVENT_ON) | |
873 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0); | |
874 | ||
875 | ata_link_for_each_dev(dev, &ap->link) { | |
876 | if (dev->acpi_handle && ata_dev_enabled(dev)) | |
877 | acpi_bus_set_power(dev->acpi_handle, | |
878 | state.event == PM_EVENT_ON ? | |
879 | ACPI_STATE_D0 : ACPI_STATE_D3); | |
880 | } | |
881 | if (state.event != PM_EVENT_ON) | |
882 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3); | |
883 | } | |
884 | ||
6746544c TH |
885 | /** |
886 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
887 | * @dev: target ATA device | |
888 | * | |
889 | * This function is called when @dev is about to be configured. | |
890 | * IDENTIFY data might have been modified after this hook is run. | |
891 | * | |
892 | * LOCKING: | |
893 | * EH context. | |
894 | * | |
895 | * RETURNS: | |
896 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
897 | * -errno on failure. | |
898 | */ | |
899 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
900 | { | |
9af5c9c9 TH |
901 | struct ata_port *ap = dev->link->ap; |
902 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
6746544c | 903 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
66fa7f21 | 904 | int nr_executed = 0; |
6746544c TH |
905 | int rc; |
906 | ||
6746544c TH |
907 | if (!dev->acpi_handle) |
908 | return 0; | |
909 | ||
910 | /* do we need to do _GTF? */ | |
911 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
912 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
913 | return 0; | |
914 | ||
915 | /* do _SDD if SATA */ | |
916 | if (acpi_sata) { | |
917 | rc = ata_acpi_push_id(dev); | |
918 | if (rc) | |
919 | goto acpi_err; | |
920 | } | |
921 | ||
922 | /* do _GTF */ | |
66fa7f21 TH |
923 | rc = ata_acpi_exec_tfs(dev, &nr_executed); |
924 | if (rc) | |
6746544c TH |
925 | goto acpi_err; |
926 | ||
927 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
928 | ||
929 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
66fa7f21 | 930 | if (nr_executed) { |
6746544c TH |
931 | rc = ata_dev_reread_id(dev, 0); |
932 | if (rc < 0) { | |
933 | ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY " | |
934 | "after ACPI commands\n"); | |
935 | return rc; | |
936 | } | |
937 | } | |
938 | ||
939 | return 0; | |
940 | ||
941 | acpi_err: | |
66fa7f21 TH |
942 | /* ignore evaluation failure if we can continue safely */ |
943 | if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
944 | return 0; | |
6746544c | 945 | |
66fa7f21 TH |
946 | /* fail and let EH retry once more for unknown IO errors */ |
947 | if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { | |
948 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
949 | return rc; | |
6746544c | 950 | } |
66fa7f21 TH |
951 | |
952 | ata_dev_printk(dev, KERN_WARNING, | |
953 | "ACPI: failed the second time, disabled\n"); | |
954 | dev->acpi_handle = NULL; | |
955 | ||
956 | /* We can safely continue if no _GTF command has been executed | |
957 | * and port is not frozen. | |
958 | */ | |
959 | if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
960 | return 0; | |
961 | ||
6746544c TH |
962 | return rc; |
963 | } | |
562f0c2d TH |
964 | |
965 | /** | |
966 | * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled | |
967 | * @dev: target ATA device | |
968 | * | |
969 | * This function is called when @dev is about to be disabled. | |
970 | * | |
971 | * LOCKING: | |
972 | * EH context. | |
973 | */ | |
974 | void ata_acpi_on_disable(struct ata_device *dev) | |
975 | { | |
398e0782 | 976 | ata_acpi_clear_gtf(dev); |
562f0c2d | 977 | } |