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