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); | |
230 | #if defined(CONFIG_ACPI_DOCK) || defined(CONFIG_ACPI_DOCK_MODULE) | |
231 | /* we might be on a docking station */ | |
232 | register_hotplug_dock_device(ap->acpi_handle, | |
233 | ata_acpi_ap_notify, ap); | |
234 | #endif | |
235 | } | |
237d8440 MG |
236 | |
237 | for (j = 0; j < ata_link_max_devices(&ap->link); j++) { | |
238 | struct ata_device *dev = &ap->link.device[j]; | |
239 | ||
233f1120 TH |
240 | if (dev->acpi_handle) { |
241 | acpi_install_notify_handler(dev->acpi_handle, | |
242 | ACPI_SYSTEM_NOTIFY, | |
243 | ata_acpi_dev_notify, dev); | |
244 | #if defined(CONFIG_ACPI_DOCK) || defined(CONFIG_ACPI_DOCK_MODULE) | |
245 | /* we might be on a docking station */ | |
246 | register_hotplug_dock_device(dev->acpi_handle, | |
247 | ata_acpi_dev_notify, dev); | |
248 | #endif | |
249 | } | |
237d8440 | 250 | } |
11ef697b | 251 | } |
11ef697b KCA |
252 | } |
253 | ||
562f0c2d TH |
254 | /** |
255 | * ata_acpi_dissociate - dissociate ATA host from ACPI objects | |
256 | * @host: target ATA host | |
257 | * | |
258 | * This function is called during driver detach after the whole host | |
259 | * is shut down. | |
260 | * | |
261 | * LOCKING: | |
262 | * EH context. | |
263 | */ | |
264 | void ata_acpi_dissociate(struct ata_host *host) | |
265 | { | |
c05e6ff0 TH |
266 | int i; |
267 | ||
268 | /* Restore initial _GTM values so that driver which attaches | |
269 | * afterward can use them too. | |
270 | */ | |
271 | for (i = 0; i < host->n_ports; i++) { | |
272 | struct ata_port *ap = host->ports[i]; | |
273 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); | |
274 | ||
275 | if (ap->acpi_handle && gtm) | |
276 | ata_acpi_stm(ap, gtm); | |
277 | } | |
562f0c2d TH |
278 | } |
279 | ||
64578a3d TH |
280 | /** |
281 | * ata_acpi_gtm - execute _GTM | |
282 | * @ap: target ATA port | |
283 | * @gtm: out parameter for _GTM result | |
284 | * | |
285 | * Evaluate _GTM and store the result in @gtm. | |
286 | * | |
287 | * LOCKING: | |
288 | * EH context. | |
289 | * | |
290 | * RETURNS: | |
291 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
292 | */ | |
0d02f0b2 | 293 | int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) |
64578a3d TH |
294 | { |
295 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
296 | union acpi_object *out_obj; | |
297 | acpi_status status; | |
298 | int rc = 0; | |
299 | ||
300 | status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output); | |
301 | ||
302 | rc = -ENOENT; | |
303 | if (status == AE_NOT_FOUND) | |
304 | goto out_free; | |
305 | ||
306 | rc = -EINVAL; | |
307 | if (ACPI_FAILURE(status)) { | |
308 | ata_port_printk(ap, KERN_ERR, | |
309 | "ACPI get timing mode failed (AE 0x%x)\n", | |
310 | status); | |
311 | goto out_free; | |
312 | } | |
313 | ||
314 | out_obj = output.pointer; | |
315 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
316 | ata_port_printk(ap, KERN_WARNING, | |
317 | "_GTM returned unexpected object type 0x%x\n", | |
318 | out_obj->type); | |
319 | ||
320 | goto out_free; | |
321 | } | |
322 | ||
323 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
324 | ata_port_printk(ap, KERN_ERR, | |
325 | "_GTM returned invalid length %d\n", | |
326 | out_obj->buffer.length); | |
327 | goto out_free; | |
328 | } | |
329 | ||
330 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
331 | rc = 0; | |
332 | out_free: | |
333 | kfree(output.pointer); | |
334 | return rc; | |
335 | } | |
336 | ||
badff03d AC |
337 | EXPORT_SYMBOL_GPL(ata_acpi_gtm); |
338 | ||
64578a3d TH |
339 | /** |
340 | * ata_acpi_stm - execute _STM | |
341 | * @ap: target ATA port | |
342 | * @stm: timing parameter to _STM | |
343 | * | |
344 | * Evaluate _STM with timing parameter @stm. | |
345 | * | |
346 | * LOCKING: | |
347 | * EH context. | |
348 | * | |
349 | * RETURNS: | |
350 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
351 | */ | |
0d02f0b2 | 352 | int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm) |
64578a3d TH |
353 | { |
354 | acpi_status status; | |
0d02f0b2 | 355 | struct ata_acpi_gtm stm_buf = *stm; |
64578a3d TH |
356 | struct acpi_object_list input; |
357 | union acpi_object in_params[3]; | |
358 | ||
359 | in_params[0].type = ACPI_TYPE_BUFFER; | |
360 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
0d02f0b2 | 361 | in_params[0].buffer.pointer = (u8 *)&stm_buf; |
64578a3d TH |
362 | /* Buffers for id may need byteswapping ? */ |
363 | in_params[1].type = ACPI_TYPE_BUFFER; | |
364 | in_params[1].buffer.length = 512; | |
9af5c9c9 | 365 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
64578a3d TH |
366 | in_params[2].type = ACPI_TYPE_BUFFER; |
367 | in_params[2].buffer.length = 512; | |
9af5c9c9 | 368 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
64578a3d TH |
369 | |
370 | input.count = 3; | |
371 | input.pointer = in_params; | |
372 | ||
373 | status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL); | |
374 | ||
375 | if (status == AE_NOT_FOUND) | |
376 | return -ENOENT; | |
377 | if (ACPI_FAILURE(status)) { | |
378 | ata_port_printk(ap, KERN_ERR, | |
379 | "ACPI set timing mode failed (status=0x%x)\n", status); | |
380 | return -EINVAL; | |
381 | } | |
382 | return 0; | |
383 | } | |
384 | ||
badff03d AC |
385 | EXPORT_SYMBOL_GPL(ata_acpi_stm); |
386 | ||
11ef697b | 387 | /** |
4700c4bc | 388 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
3a32a8e9 | 389 | * @dev: target ATA device |
4700c4bc | 390 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
11ef697b KCA |
391 | * |
392 | * This applies to both PATA and SATA drives. | |
393 | * | |
394 | * The _GTF method has no input parameters. | |
395 | * It returns a variable number of register set values (registers | |
396 | * hex 1F1..1F7, taskfiles). | |
397 | * The <variable number> is not known in advance, so have ACPI-CA | |
398 | * allocate the buffer as needed and return it, then free it later. | |
399 | * | |
4700c4bc TH |
400 | * LOCKING: |
401 | * EH context. | |
402 | * | |
403 | * RETURNS: | |
66fa7f21 TH |
404 | * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL |
405 | * if _GTF is invalid. | |
11ef697b | 406 | */ |
398e0782 | 407 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) |
11ef697b | 408 | { |
9af5c9c9 | 409 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 410 | acpi_status status; |
3a32a8e9 TH |
411 | struct acpi_buffer output; |
412 | union acpi_object *out_obj; | |
4700c4bc | 413 | int rc = 0; |
11ef697b | 414 | |
398e0782 TH |
415 | /* if _GTF is cached, use the cached value */ |
416 | if (dev->gtf_cache) { | |
417 | out_obj = dev->gtf_cache; | |
418 | goto done; | |
419 | } | |
420 | ||
4700c4bc TH |
421 | /* set up output buffer */ |
422 | output.length = ACPI_ALLOCATE_BUFFER; | |
423 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
11ef697b | 424 | |
11ef697b | 425 | if (ata_msg_probe(ap)) |
3a32a8e9 | 426 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n", |
7f5e4e8d | 427 | __func__, ap->port_no); |
11ef697b | 428 | |
11ef697b | 429 | /* _GTF has no input parameters */ |
4700c4bc | 430 | status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output); |
398e0782 | 431 | out_obj = dev->gtf_cache = output.pointer; |
4700c4bc | 432 | |
11ef697b | 433 | if (ACPI_FAILURE(status)) { |
4700c4bc TH |
434 | if (status != AE_NOT_FOUND) { |
435 | ata_dev_printk(dev, KERN_WARNING, | |
436 | "_GTF evaluation failed (AE 0x%x)\n", | |
437 | status); | |
66fa7f21 | 438 | rc = -EINVAL; |
4700c4bc TH |
439 | } |
440 | goto out_free; | |
11ef697b KCA |
441 | } |
442 | ||
443 | if (!output.length || !output.pointer) { | |
444 | if (ata_msg_probe(ap)) | |
3a32a8e9 | 445 | ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: " |
11ef697b | 446 | "length or ptr is NULL (0x%llx, 0x%p)\n", |
7f5e4e8d | 447 | __func__, |
11ef697b KCA |
448 | (unsigned long long)output.length, |
449 | output.pointer); | |
66fa7f21 | 450 | rc = -EINVAL; |
4700c4bc | 451 | goto out_free; |
11ef697b KCA |
452 | } |
453 | ||
11ef697b | 454 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
69b16a5f TH |
455 | ata_dev_printk(dev, KERN_WARNING, |
456 | "_GTF unexpected object type 0x%x\n", | |
457 | out_obj->type); | |
66fa7f21 | 458 | rc = -EINVAL; |
4700c4bc | 459 | goto out_free; |
11ef697b KCA |
460 | } |
461 | ||
4700c4bc | 462 | if (out_obj->buffer.length % REGS_PER_GTF) { |
69b16a5f TH |
463 | ata_dev_printk(dev, KERN_WARNING, |
464 | "unexpected _GTF length (%d)\n", | |
465 | out_obj->buffer.length); | |
66fa7f21 | 466 | rc = -EINVAL; |
4700c4bc | 467 | goto out_free; |
11ef697b KCA |
468 | } |
469 | ||
398e0782 | 470 | done: |
4700c4bc | 471 | rc = out_obj->buffer.length / REGS_PER_GTF; |
398e0782 TH |
472 | if (gtf) { |
473 | *gtf = (void *)out_obj->buffer.pointer; | |
474 | if (ata_msg_probe(ap)) | |
475 | ata_dev_printk(dev, KERN_DEBUG, | |
476 | "%s: returning gtf=%p, gtf_count=%d\n", | |
7f5e4e8d | 477 | __func__, *gtf, rc); |
398e0782 | 478 | } |
4700c4bc TH |
479 | return rc; |
480 | ||
481 | out_free: | |
398e0782 | 482 | ata_acpi_clear_gtf(dev); |
4700c4bc | 483 | return rc; |
11ef697b KCA |
484 | } |
485 | ||
7c77fa4d TH |
486 | /** |
487 | * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter | |
488 | * @dev: target device | |
489 | * @gtm: GTM parameter to use | |
490 | * | |
491 | * Determine xfermask for @dev from @gtm. | |
492 | * | |
493 | * LOCKING: | |
494 | * None. | |
495 | * | |
496 | * RETURNS: | |
497 | * Determined xfermask. | |
498 | */ | |
499 | unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, | |
500 | const struct ata_acpi_gtm *gtm) | |
501 | { | |
a0f79b92 TH |
502 | unsigned long xfer_mask = 0; |
503 | unsigned int type; | |
504 | int unit; | |
505 | u8 mode; | |
7c77fa4d TH |
506 | |
507 | /* we always use the 0 slot for crap hardware */ | |
508 | unit = dev->devno; | |
509 | if (!(gtm->flags & 0x10)) | |
510 | unit = 0; | |
511 | ||
a0f79b92 TH |
512 | /* PIO */ |
513 | mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); | |
514 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d TH |
515 | |
516 | /* See if we have MWDMA or UDMA data. We don't bother with | |
517 | * MWDMA if UDMA is available as this means the BIOS set UDMA | |
518 | * and our error changedown if it works is UDMA to PIO anyway. | |
519 | */ | |
a0f79b92 TH |
520 | if (!(gtm->flags & (1 << (2 * unit)))) |
521 | type = ATA_SHIFT_MWDMA; | |
522 | else | |
523 | type = ATA_SHIFT_UDMA; | |
524 | ||
525 | mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); | |
526 | xfer_mask |= ata_xfer_mode2mask(mode); | |
7c77fa4d | 527 | |
a0f79b92 | 528 | return xfer_mask; |
7c77fa4d TH |
529 | } |
530 | EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); | |
531 | ||
e1ddb4b6 AC |
532 | /** |
533 | * ata_acpi_cbl_80wire - Check for 80 wire cable | |
534 | * @ap: Port to check | |
021ee9a6 | 535 | * @gtm: GTM data to use |
e1ddb4b6 | 536 | * |
021ee9a6 | 537 | * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. |
e1ddb4b6 | 538 | */ |
021ee9a6 | 539 | int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) |
e1ddb4b6 | 540 | { |
021ee9a6 TH |
541 | struct ata_device *dev; |
542 | ||
543 | ata_link_for_each_dev(dev, &ap->link) { | |
544 | unsigned long xfer_mask, udma_mask; | |
545 | ||
546 | if (!ata_dev_enabled(dev)) | |
547 | continue; | |
548 | ||
549 | xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); | |
550 | ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); | |
551 | ||
552 | if (udma_mask & ~ATA_UDMA_MASK_40C) | |
553 | return 1; | |
554 | } | |
555 | ||
e1ddb4b6 AC |
556 | return 0; |
557 | } | |
e1ddb4b6 AC |
558 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); |
559 | ||
3264a8d8 TH |
560 | static void ata_acpi_gtf_to_tf(struct ata_device *dev, |
561 | const struct ata_acpi_gtf *gtf, | |
562 | struct ata_taskfile *tf) | |
563 | { | |
564 | ata_tf_init(dev, tf); | |
565 | ||
566 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
567 | tf->protocol = ATA_PROT_NODATA; | |
568 | tf->feature = gtf->tf[0]; /* 0x1f1 */ | |
569 | tf->nsect = gtf->tf[1]; /* 0x1f2 */ | |
570 | tf->lbal = gtf->tf[2]; /* 0x1f3 */ | |
571 | tf->lbam = gtf->tf[3]; /* 0x1f4 */ | |
572 | tf->lbah = gtf->tf[4]; /* 0x1f5 */ | |
573 | tf->device = gtf->tf[5]; /* 0x1f6 */ | |
574 | tf->command = gtf->tf[6]; /* 0x1f7 */ | |
575 | } | |
576 | ||
577 | static int ata_acpi_filter_tf(const struct ata_taskfile *tf, | |
578 | const struct ata_taskfile *ptf) | |
579 | { | |
580 | if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_SETXFER) { | |
581 | /* libata doesn't use ACPI to configure transfer mode. | |
582 | * It will only confuse device configuration. Skip. | |
583 | */ | |
584 | if (tf->command == ATA_CMD_SET_FEATURES && | |
585 | tf->feature == SETFEATURES_XFER) | |
586 | return 1; | |
587 | } | |
588 | ||
589 | if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_LOCK) { | |
590 | /* BIOS writers, sorry but we don't wanna lock | |
591 | * features unless the user explicitly said so. | |
592 | */ | |
593 | ||
594 | /* DEVICE CONFIGURATION FREEZE LOCK */ | |
595 | if (tf->command == ATA_CMD_CONF_OVERLAY && | |
596 | tf->feature == ATA_DCO_FREEZE_LOCK) | |
597 | return 1; | |
598 | ||
599 | /* SECURITY FREEZE LOCK */ | |
600 | if (tf->command == ATA_CMD_SEC_FREEZE_LOCK) | |
601 | return 1; | |
602 | ||
603 | /* SET MAX LOCK and SET MAX FREEZE LOCK */ | |
604 | if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) && | |
605 | tf->command == ATA_CMD_SET_MAX && | |
606 | (tf->feature == ATA_SET_MAX_LOCK || | |
607 | tf->feature == ATA_SET_MAX_FREEZE_LOCK)) | |
608 | return 1; | |
609 | } | |
610 | ||
611 | return 0; | |
612 | } | |
613 | ||
11ef697b | 614 | /** |
0e8634bf | 615 | * ata_acpi_run_tf - send taskfile registers to host controller |
3a32a8e9 | 616 | * @dev: target ATA device |
11ef697b KCA |
617 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
618 | * | |
619 | * Outputs ATA taskfile to standard ATA host controller using MMIO | |
620 | * or PIO as indicated by the ATA_FLAG_MMIO flag. | |
621 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. | |
622 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
623 | * hob_lbal, hob_lbam, and hob_lbah. | |
624 | * | |
625 | * This function waits for idle (!BUSY and !DRQ) after writing | |
626 | * registers. If the control register has a new value, this | |
627 | * function also waits for idle after writing control and before | |
628 | * writing the remaining registers. | |
629 | * | |
4700c4bc TH |
630 | * LOCKING: |
631 | * EH context. | |
632 | * | |
633 | * RETURNS: | |
3264a8d8 TH |
634 | * 1 if command is executed successfully. 0 if ignored, rejected or |
635 | * filtered out, -errno on other errors. | |
11ef697b | 636 | */ |
0e8634bf | 637 | static int ata_acpi_run_tf(struct ata_device *dev, |
3264a8d8 TH |
638 | const struct ata_acpi_gtf *gtf, |
639 | const struct ata_acpi_gtf *prev_gtf) | |
11ef697b | 640 | { |
3264a8d8 TH |
641 | struct ata_taskfile *pptf = NULL; |
642 | struct ata_taskfile tf, ptf, rtf; | |
4700c4bc | 643 | unsigned int err_mask; |
0e8634bf TH |
644 | const char *level; |
645 | char msg[60]; | |
646 | int rc; | |
fc16c25f | 647 | |
4700c4bc TH |
648 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
649 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
650 | && (gtf->tf[6] == 0)) | |
651 | return 0; | |
11ef697b | 652 | |
3264a8d8 TH |
653 | ata_acpi_gtf_to_tf(dev, gtf, &tf); |
654 | if (prev_gtf) { | |
655 | ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); | |
656 | pptf = &ptf; | |
657 | } | |
658 | ||
659 | if (!ata_acpi_filter_tf(&tf, pptf)) { | |
660 | rtf = tf; | |
661 | err_mask = ata_exec_internal(dev, &rtf, NULL, | |
662 | DMA_NONE, NULL, 0, 0); | |
663 | ||
664 | switch (err_mask) { | |
665 | case 0: | |
666 | level = KERN_DEBUG; | |
667 | snprintf(msg, sizeof(msg), "succeeded"); | |
668 | rc = 1; | |
669 | break; | |
670 | ||
671 | case AC_ERR_DEV: | |
672 | level = KERN_INFO; | |
673 | snprintf(msg, sizeof(msg), | |
674 | "rejected by device (Stat=0x%02x Err=0x%02x)", | |
675 | rtf.command, rtf.feature); | |
676 | rc = 0; | |
677 | break; | |
678 | ||
679 | default: | |
680 | level = KERN_ERR; | |
681 | snprintf(msg, sizeof(msg), | |
682 | "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", | |
683 | err_mask, rtf.command, rtf.feature); | |
684 | rc = -EIO; | |
685 | break; | |
686 | } | |
687 | } else { | |
0e8634bf | 688 | level = KERN_INFO; |
3264a8d8 | 689 | snprintf(msg, sizeof(msg), "filtered out"); |
0e8634bf | 690 | rc = 0; |
4700c4bc TH |
691 | } |
692 | ||
0e8634bf TH |
693 | ata_dev_printk(dev, level, |
694 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x %s\n", | |
695 | tf.command, tf.feature, tf.nsect, tf.lbal, | |
696 | tf.lbam, tf.lbah, tf.device, msg); | |
697 | ||
698 | return rc; | |
11ef697b KCA |
699 | } |
700 | ||
11ef697b KCA |
701 | /** |
702 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 703 | * @dev: target ATA device |
66fa7f21 | 704 | * @nr_executed: out paramter for the number of executed commands |
11ef697b | 705 | * |
6746544c | 706 | * Evaluate _GTF and excute returned taskfiles. |
69b16a5f TH |
707 | * |
708 | * LOCKING: | |
709 | * EH context. | |
710 | * | |
711 | * RETURNS: | |
66fa7f21 TH |
712 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist. |
713 | * -errno on other errors. | |
11ef697b | 714 | */ |
66fa7f21 | 715 | static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) |
11ef697b | 716 | { |
3264a8d8 | 717 | struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL; |
6746544c TH |
718 | int gtf_count, i, rc; |
719 | ||
720 | /* get taskfiles */ | |
66fa7f21 TH |
721 | rc = ata_dev_get_GTF(dev, >f); |
722 | if (rc < 0) | |
723 | return rc; | |
724 | gtf_count = rc; | |
6746544c TH |
725 | |
726 | /* execute them */ | |
3264a8d8 TH |
727 | for (i = 0; i < gtf_count; i++, gtf++) { |
728 | rc = ata_acpi_run_tf(dev, gtf, pgtf); | |
0e8634bf TH |
729 | if (rc < 0) |
730 | break; | |
3264a8d8 | 731 | if (rc) { |
0e8634bf | 732 | (*nr_executed)++; |
3264a8d8 TH |
733 | pgtf = gtf; |
734 | } | |
11ef697b KCA |
735 | } |
736 | ||
398e0782 | 737 | ata_acpi_clear_gtf(dev); |
6746544c | 738 | |
0e8634bf TH |
739 | if (rc < 0) |
740 | return rc; | |
741 | return 0; | |
11ef697b KCA |
742 | } |
743 | ||
7ea1fbc2 KCA |
744 | /** |
745 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 746 | * @dev: target ATA device |
7ea1fbc2 KCA |
747 | * |
748 | * _SDD ACPI object: for SATA mode only | |
749 | * Must be after Identify (Packet) Device -- uses its data | |
750 | * ATM this function never returns a failure. It is an optional | |
751 | * method and if it fails for whatever reason, we should still | |
752 | * just keep going. | |
69b16a5f TH |
753 | * |
754 | * LOCKING: | |
755 | * EH context. | |
756 | * | |
757 | * RETURNS: | |
758 | * 0 on success, -errno on failure. | |
7ea1fbc2 | 759 | */ |
6746544c | 760 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 761 | { |
9af5c9c9 | 762 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 763 | int err; |
3a32a8e9 TH |
764 | acpi_status status; |
765 | struct acpi_object_list input; | |
766 | union acpi_object in_params[1]; | |
7ea1fbc2 | 767 | |
7ea1fbc2 | 768 | if (ata_msg_probe(ap)) |
3a32a8e9 | 769 | ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n", |
7f5e4e8d | 770 | __func__, dev->devno, ap->port_no); |
7ea1fbc2 | 771 | |
7ea1fbc2 KCA |
772 | /* Give the drive Identify data to the drive via the _SDD method */ |
773 | /* _SDD: set up input parameters */ | |
774 | input.count = 1; | |
775 | input.pointer = in_params; | |
776 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
777 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
778 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
779 | /* Output buffer: _SDD has no output */ |
780 | ||
781 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 782 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
fafbae87 | 783 | status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL); |
3a32a8e9 | 784 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 KCA |
785 | |
786 | err = ACPI_FAILURE(status) ? -EIO : 0; | |
69b16a5f TH |
787 | if (err < 0) |
788 | ata_dev_printk(dev, KERN_WARNING, | |
789 | "ACPI _SDD failed (AE 0x%x)\n", status); | |
7ea1fbc2 | 790 | |
6746544c TH |
791 | return err; |
792 | } | |
793 | ||
64578a3d TH |
794 | /** |
795 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
796 | * @ap: target ATA port | |
797 | * | |
798 | * This function is called when @ap is about to be suspended. All | |
799 | * devices are already put to sleep but the port_suspend() callback | |
800 | * hasn't been executed yet. Error return from this function aborts | |
801 | * suspend. | |
802 | * | |
803 | * LOCKING: | |
804 | * EH context. | |
805 | * | |
806 | * RETURNS: | |
807 | * 0 on success, -errno on failure. | |
808 | */ | |
809 | int ata_acpi_on_suspend(struct ata_port *ap) | |
810 | { | |
c05e6ff0 TH |
811 | /* nada */ |
812 | return 0; | |
64578a3d TH |
813 | } |
814 | ||
6746544c TH |
815 | /** |
816 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
817 | * @ap: target ATA port | |
818 | * | |
819 | * This function is called when @ap is resumed - right after port | |
820 | * itself is resumed but before any EH action is taken. | |
821 | * | |
822 | * LOCKING: | |
823 | * EH context. | |
824 | */ | |
825 | void ata_acpi_on_resume(struct ata_port *ap) | |
826 | { | |
c05e6ff0 | 827 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
f58229f8 | 828 | struct ata_device *dev; |
6746544c | 829 | |
398e0782 TH |
830 | if (ap->acpi_handle && gtm) { |
831 | /* _GTM valid */ | |
832 | ||
833 | /* restore timing parameters */ | |
c05e6ff0 | 834 | ata_acpi_stm(ap, gtm); |
64578a3d | 835 | |
398e0782 TH |
836 | /* _GTF should immediately follow _STM so that it can |
837 | * use values set by _STM. Cache _GTF result and | |
838 | * schedule _GTF. | |
839 | */ | |
840 | ata_link_for_each_dev(dev, &ap->link) { | |
841 | ata_acpi_clear_gtf(dev); | |
48feb3c4 SL |
842 | if (ata_dev_enabled(dev) && |
843 | ata_dev_get_GTF(dev, NULL) >= 0) | |
398e0782 TH |
844 | dev->flags |= ATA_DFLAG_ACPI_PENDING; |
845 | } | |
846 | } else { | |
847 | /* SATA _GTF needs to be evaulated after _SDD and | |
848 | * there's no reason to evaluate IDE _GTF early | |
849 | * without _STM. Clear cache and schedule _GTF. | |
850 | */ | |
851 | ata_link_for_each_dev(dev, &ap->link) { | |
852 | ata_acpi_clear_gtf(dev); | |
48feb3c4 SL |
853 | if (ata_dev_enabled(dev)) |
854 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
398e0782 TH |
855 | } |
856 | } | |
7ea1fbc2 KCA |
857 | } |
858 | ||
bd3adca5 SL |
859 | /** |
860 | * ata_acpi_set_state - set the port power state | |
861 | * @ap: target ATA port | |
862 | * @state: state, on/off | |
863 | * | |
864 | * This function executes the _PS0/_PS3 ACPI method to set the power state. | |
865 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off | |
866 | */ | |
867 | void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
868 | { | |
869 | struct ata_device *dev; | |
870 | ||
871 | if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA)) | |
872 | return; | |
873 | ||
874 | /* channel first and then drives for power on and vica versa | |
875 | for power off */ | |
876 | if (state.event == PM_EVENT_ON) | |
877 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0); | |
878 | ||
879 | ata_link_for_each_dev(dev, &ap->link) { | |
880 | if (dev->acpi_handle && ata_dev_enabled(dev)) | |
881 | acpi_bus_set_power(dev->acpi_handle, | |
882 | state.event == PM_EVENT_ON ? | |
883 | ACPI_STATE_D0 : ACPI_STATE_D3); | |
884 | } | |
885 | if (state.event != PM_EVENT_ON) | |
886 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3); | |
887 | } | |
888 | ||
6746544c TH |
889 | /** |
890 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
891 | * @dev: target ATA device | |
892 | * | |
893 | * This function is called when @dev is about to be configured. | |
894 | * IDENTIFY data might have been modified after this hook is run. | |
895 | * | |
896 | * LOCKING: | |
897 | * EH context. | |
898 | * | |
899 | * RETURNS: | |
900 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
901 | * -errno on failure. | |
902 | */ | |
903 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
904 | { | |
9af5c9c9 TH |
905 | struct ata_port *ap = dev->link->ap; |
906 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
6746544c | 907 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
66fa7f21 | 908 | int nr_executed = 0; |
6746544c TH |
909 | int rc; |
910 | ||
6746544c TH |
911 | if (!dev->acpi_handle) |
912 | return 0; | |
913 | ||
914 | /* do we need to do _GTF? */ | |
915 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
916 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
917 | return 0; | |
918 | ||
919 | /* do _SDD if SATA */ | |
920 | if (acpi_sata) { | |
921 | rc = ata_acpi_push_id(dev); | |
922 | if (rc) | |
923 | goto acpi_err; | |
924 | } | |
925 | ||
926 | /* do _GTF */ | |
66fa7f21 TH |
927 | rc = ata_acpi_exec_tfs(dev, &nr_executed); |
928 | if (rc) | |
6746544c TH |
929 | goto acpi_err; |
930 | ||
931 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
932 | ||
933 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
66fa7f21 | 934 | if (nr_executed) { |
6746544c TH |
935 | rc = ata_dev_reread_id(dev, 0); |
936 | if (rc < 0) { | |
937 | ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY " | |
938 | "after ACPI commands\n"); | |
939 | return rc; | |
940 | } | |
941 | } | |
942 | ||
943 | return 0; | |
944 | ||
945 | acpi_err: | |
66fa7f21 TH |
946 | /* ignore evaluation failure if we can continue safely */ |
947 | if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
948 | return 0; | |
6746544c | 949 | |
66fa7f21 TH |
950 | /* fail and let EH retry once more for unknown IO errors */ |
951 | if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { | |
952 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
953 | return rc; | |
6746544c | 954 | } |
66fa7f21 TH |
955 | |
956 | ata_dev_printk(dev, KERN_WARNING, | |
957 | "ACPI: failed the second time, disabled\n"); | |
958 | dev->acpi_handle = NULL; | |
959 | ||
960 | /* We can safely continue if no _GTF command has been executed | |
961 | * and port is not frozen. | |
962 | */ | |
963 | if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
964 | return 0; | |
965 | ||
6746544c TH |
966 | return rc; |
967 | } | |
562f0c2d TH |
968 | |
969 | /** | |
970 | * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled | |
971 | * @dev: target ATA device | |
972 | * | |
973 | * This function is called when @dev is about to be disabled. | |
974 | * | |
975 | * LOCKING: | |
976 | * EH context. | |
977 | */ | |
978 | void ata_acpi_on_disable(struct ata_device *dev) | |
979 | { | |
398e0782 | 980 | ata_acpi_clear_gtf(dev); |
562f0c2d | 981 | } |