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 | ||
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", |
878d4fed | 385 | __FUNCTION__, 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 KCA |
404 | "length or ptr is NULL (0x%llx, 0x%p)\n", |
405 | __FUNCTION__, | |
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", | |
435 | __FUNCTION__, *gtf, rc); | |
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 | /* Welcome to ACPI, bring a bucket */ |
445 | const unsigned int ata_acpi_pio_cycle[7] = { | |
446 | 600, 383, 240, 180, 120, 100, 80 | |
447 | }; | |
448 | EXPORT_SYMBOL_GPL(ata_acpi_pio_cycle); | |
449 | ||
450 | const unsigned int ata_acpi_mwdma_cycle[5] = { | |
451 | 480, 150, 120, 100, 80 | |
452 | }; | |
453 | EXPORT_SYMBOL_GPL(ata_acpi_mwdma_cycle); | |
454 | ||
455 | const unsigned int ata_acpi_udma_cycle[7] = { | |
456 | 120, 80, 60, 45, 30, 20, 15 | |
457 | }; | |
458 | EXPORT_SYMBOL_GPL(ata_acpi_udma_cycle); | |
459 | ||
460 | /** | |
461 | * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter | |
462 | * @dev: target device | |
463 | * @gtm: GTM parameter to use | |
464 | * | |
465 | * Determine xfermask for @dev from @gtm. | |
466 | * | |
467 | * LOCKING: | |
468 | * None. | |
469 | * | |
470 | * RETURNS: | |
471 | * Determined xfermask. | |
472 | */ | |
473 | unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, | |
474 | const struct ata_acpi_gtm *gtm) | |
475 | { | |
5df91a25 | 476 | unsigned long pio_mask = 0, mwdma_mask = 0, udma_mask = 0; |
7c77fa4d TH |
477 | int unit, i; |
478 | u32 t; | |
7c77fa4d TH |
479 | |
480 | /* we always use the 0 slot for crap hardware */ | |
481 | unit = dev->devno; | |
482 | if (!(gtm->flags & 0x10)) | |
483 | unit = 0; | |
484 | ||
5df91a25 TH |
485 | /* Values larger than the longest cycle results in 0 mask |
486 | * while values equal to smaller than the shortest cycle | |
487 | * results in mask which includes all supported modes. | |
488 | * Disabled transfer method has the value of 0xffffffff which | |
489 | * will always result in 0 mask. | |
490 | */ | |
491 | ||
7c77fa4d | 492 | /* start by scanning for PIO modes */ |
5df91a25 TH |
493 | t = gtm->drive[unit].pio; |
494 | for (i = 0; i < ARRAY_SIZE(ata_acpi_pio_cycle); i++) | |
495 | if (t > ata_acpi_pio_cycle[i]) | |
7c77fa4d | 496 | break; |
5df91a25 | 497 | pio_mask = (1 << i) - 1; |
7c77fa4d TH |
498 | |
499 | /* See if we have MWDMA or UDMA data. We don't bother with | |
500 | * MWDMA if UDMA is available as this means the BIOS set UDMA | |
501 | * and our error changedown if it works is UDMA to PIO anyway. | |
502 | */ | |
5df91a25 TH |
503 | t = gtm->drive[unit].dma; |
504 | if (!(gtm->flags & (1 << (2 * unit)))) { | |
7c77fa4d | 505 | /* MWDMA */ |
5df91a25 TH |
506 | for (i = 0; i < ARRAY_SIZE(ata_acpi_mwdma_cycle); i++) |
507 | if (t > ata_acpi_mwdma_cycle[i]) | |
7c77fa4d | 508 | break; |
5df91a25 | 509 | mwdma_mask = (1 << i) - 1; |
7c77fa4d TH |
510 | } else { |
511 | /* UDMA */ | |
5df91a25 TH |
512 | for (i = 0; i < ARRAY_SIZE(ata_acpi_udma_cycle); i++) |
513 | if (t > ata_acpi_udma_cycle[i]) | |
7c77fa4d | 514 | break; |
5df91a25 | 515 | udma_mask = (1 << i) - 1; |
7c77fa4d TH |
516 | } |
517 | ||
5df91a25 | 518 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); |
7c77fa4d TH |
519 | } |
520 | EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); | |
521 | ||
e1ddb4b6 AC |
522 | /** |
523 | * ata_acpi_cbl_80wire - Check for 80 wire cable | |
524 | * @ap: Port to check | |
525 | * | |
526 | * Return 1 if the ACPI mode data for this port indicates the BIOS selected | |
527 | * an 80wire mode. | |
528 | */ | |
529 | ||
530 | int ata_acpi_cbl_80wire(struct ata_port *ap) | |
531 | { | |
c05e6ff0 | 532 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
e1ddb4b6 | 533 | int valid = 0; |
2dcb407e | 534 | |
c05e6ff0 | 535 | if (!gtm) |
e1ddb4b6 | 536 | return 0; |
2dcb407e | 537 | |
e1ddb4b6 | 538 | /* Split timing, DMA enabled */ |
c05e6ff0 | 539 | if ((gtm->flags & 0x11) == 0x11 && gtm->drive[0].dma < 55) |
e1ddb4b6 | 540 | valid |= 1; |
c05e6ff0 | 541 | if ((gtm->flags & 0x14) == 0x14 && gtm->drive[1].dma < 55) |
e1ddb4b6 AC |
542 | valid |= 2; |
543 | /* Shared timing, DMA enabled */ | |
c05e6ff0 | 544 | if ((gtm->flags & 0x11) == 0x01 && gtm->drive[0].dma < 55) |
e1ddb4b6 | 545 | valid |= 1; |
c05e6ff0 | 546 | if ((gtm->flags & 0x14) == 0x04 && gtm->drive[0].dma < 55) |
e1ddb4b6 AC |
547 | valid |= 2; |
548 | ||
549 | /* Drive check */ | |
550 | if ((valid & 1) && ata_dev_enabled(&ap->link.device[0])) | |
551 | return 1; | |
552 | if ((valid & 2) && ata_dev_enabled(&ap->link.device[1])) | |
553 | return 1; | |
554 | return 0; | |
555 | } | |
556 | ||
557 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); | |
558 | ||
3264a8d8 TH |
559 | static void ata_acpi_gtf_to_tf(struct ata_device *dev, |
560 | const struct ata_acpi_gtf *gtf, | |
561 | struct ata_taskfile *tf) | |
562 | { | |
563 | ata_tf_init(dev, tf); | |
564 | ||
565 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
566 | tf->protocol = ATA_PROT_NODATA; | |
567 | tf->feature = gtf->tf[0]; /* 0x1f1 */ | |
568 | tf->nsect = gtf->tf[1]; /* 0x1f2 */ | |
569 | tf->lbal = gtf->tf[2]; /* 0x1f3 */ | |
570 | tf->lbam = gtf->tf[3]; /* 0x1f4 */ | |
571 | tf->lbah = gtf->tf[4]; /* 0x1f5 */ | |
572 | tf->device = gtf->tf[5]; /* 0x1f6 */ | |
573 | tf->command = gtf->tf[6]; /* 0x1f7 */ | |
574 | } | |
575 | ||
576 | static int ata_acpi_filter_tf(const struct ata_taskfile *tf, | |
577 | const struct ata_taskfile *ptf) | |
578 | { | |
579 | if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_SETXFER) { | |
580 | /* libata doesn't use ACPI to configure transfer mode. | |
581 | * It will only confuse device configuration. Skip. | |
582 | */ | |
583 | if (tf->command == ATA_CMD_SET_FEATURES && | |
584 | tf->feature == SETFEATURES_XFER) | |
585 | return 1; | |
586 | } | |
587 | ||
588 | if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_LOCK) { | |
589 | /* BIOS writers, sorry but we don't wanna lock | |
590 | * features unless the user explicitly said so. | |
591 | */ | |
592 | ||
593 | /* DEVICE CONFIGURATION FREEZE LOCK */ | |
594 | if (tf->command == ATA_CMD_CONF_OVERLAY && | |
595 | tf->feature == ATA_DCO_FREEZE_LOCK) | |
596 | return 1; | |
597 | ||
598 | /* SECURITY FREEZE LOCK */ | |
599 | if (tf->command == ATA_CMD_SEC_FREEZE_LOCK) | |
600 | return 1; | |
601 | ||
602 | /* SET MAX LOCK and SET MAX FREEZE LOCK */ | |
603 | if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) && | |
604 | tf->command == ATA_CMD_SET_MAX && | |
605 | (tf->feature == ATA_SET_MAX_LOCK || | |
606 | tf->feature == ATA_SET_MAX_FREEZE_LOCK)) | |
607 | return 1; | |
608 | } | |
609 | ||
610 | return 0; | |
611 | } | |
612 | ||
11ef697b | 613 | /** |
0e8634bf | 614 | * ata_acpi_run_tf - send taskfile registers to host controller |
3a32a8e9 | 615 | * @dev: target ATA device |
11ef697b KCA |
616 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
617 | * | |
618 | * Outputs ATA taskfile to standard ATA host controller using MMIO | |
619 | * or PIO as indicated by the ATA_FLAG_MMIO flag. | |
620 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. | |
621 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
622 | * hob_lbal, hob_lbam, and hob_lbah. | |
623 | * | |
624 | * This function waits for idle (!BUSY and !DRQ) after writing | |
625 | * registers. If the control register has a new value, this | |
626 | * function also waits for idle after writing control and before | |
627 | * writing the remaining registers. | |
628 | * | |
4700c4bc TH |
629 | * LOCKING: |
630 | * EH context. | |
631 | * | |
632 | * RETURNS: | |
3264a8d8 TH |
633 | * 1 if command is executed successfully. 0 if ignored, rejected or |
634 | * filtered out, -errno on other errors. | |
11ef697b | 635 | */ |
0e8634bf | 636 | static int ata_acpi_run_tf(struct ata_device *dev, |
3264a8d8 TH |
637 | const struct ata_acpi_gtf *gtf, |
638 | const struct ata_acpi_gtf *prev_gtf) | |
11ef697b | 639 | { |
3264a8d8 TH |
640 | struct ata_taskfile *pptf = NULL; |
641 | struct ata_taskfile tf, ptf, rtf; | |
4700c4bc | 642 | unsigned int err_mask; |
0e8634bf TH |
643 | const char *level; |
644 | char msg[60]; | |
645 | int rc; | |
fc16c25f | 646 | |
4700c4bc TH |
647 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
648 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
649 | && (gtf->tf[6] == 0)) | |
650 | return 0; | |
11ef697b | 651 | |
3264a8d8 TH |
652 | ata_acpi_gtf_to_tf(dev, gtf, &tf); |
653 | if (prev_gtf) { | |
654 | ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf); | |
655 | pptf = &ptf; | |
656 | } | |
657 | ||
658 | if (!ata_acpi_filter_tf(&tf, pptf)) { | |
659 | rtf = tf; | |
660 | err_mask = ata_exec_internal(dev, &rtf, NULL, | |
661 | DMA_NONE, NULL, 0, 0); | |
662 | ||
663 | switch (err_mask) { | |
664 | case 0: | |
665 | level = KERN_DEBUG; | |
666 | snprintf(msg, sizeof(msg), "succeeded"); | |
667 | rc = 1; | |
668 | break; | |
669 | ||
670 | case AC_ERR_DEV: | |
671 | level = KERN_INFO; | |
672 | snprintf(msg, sizeof(msg), | |
673 | "rejected by device (Stat=0x%02x Err=0x%02x)", | |
674 | rtf.command, rtf.feature); | |
675 | rc = 0; | |
676 | break; | |
677 | ||
678 | default: | |
679 | level = KERN_ERR; | |
680 | snprintf(msg, sizeof(msg), | |
681 | "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", | |
682 | err_mask, rtf.command, rtf.feature); | |
683 | rc = -EIO; | |
684 | break; | |
685 | } | |
686 | } else { | |
0e8634bf | 687 | level = KERN_INFO; |
3264a8d8 | 688 | snprintf(msg, sizeof(msg), "filtered out"); |
0e8634bf | 689 | rc = 0; |
4700c4bc TH |
690 | } |
691 | ||
0e8634bf TH |
692 | ata_dev_printk(dev, level, |
693 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x %s\n", | |
694 | tf.command, tf.feature, tf.nsect, tf.lbal, | |
695 | tf.lbam, tf.lbah, tf.device, msg); | |
696 | ||
697 | return rc; | |
11ef697b KCA |
698 | } |
699 | ||
11ef697b KCA |
700 | /** |
701 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 702 | * @dev: target ATA device |
66fa7f21 | 703 | * @nr_executed: out paramter for the number of executed commands |
11ef697b | 704 | * |
6746544c | 705 | * Evaluate _GTF and excute returned taskfiles. |
69b16a5f TH |
706 | * |
707 | * LOCKING: | |
708 | * EH context. | |
709 | * | |
710 | * RETURNS: | |
66fa7f21 TH |
711 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist. |
712 | * -errno on other errors. | |
11ef697b | 713 | */ |
66fa7f21 | 714 | static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) |
11ef697b | 715 | { |
3264a8d8 | 716 | struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL; |
6746544c TH |
717 | int gtf_count, i, rc; |
718 | ||
719 | /* get taskfiles */ | |
66fa7f21 TH |
720 | rc = ata_dev_get_GTF(dev, >f); |
721 | if (rc < 0) | |
722 | return rc; | |
723 | gtf_count = rc; | |
6746544c TH |
724 | |
725 | /* execute them */ | |
3264a8d8 TH |
726 | for (i = 0; i < gtf_count; i++, gtf++) { |
727 | rc = ata_acpi_run_tf(dev, gtf, pgtf); | |
0e8634bf TH |
728 | if (rc < 0) |
729 | break; | |
3264a8d8 | 730 | if (rc) { |
0e8634bf | 731 | (*nr_executed)++; |
3264a8d8 TH |
732 | pgtf = gtf; |
733 | } | |
11ef697b KCA |
734 | } |
735 | ||
398e0782 | 736 | ata_acpi_clear_gtf(dev); |
6746544c | 737 | |
0e8634bf TH |
738 | if (rc < 0) |
739 | return rc; | |
740 | return 0; | |
11ef697b KCA |
741 | } |
742 | ||
7ea1fbc2 KCA |
743 | /** |
744 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 745 | * @dev: target ATA device |
7ea1fbc2 KCA |
746 | * |
747 | * _SDD ACPI object: for SATA mode only | |
748 | * Must be after Identify (Packet) Device -- uses its data | |
749 | * ATM this function never returns a failure. It is an optional | |
750 | * method and if it fails for whatever reason, we should still | |
751 | * just keep going. | |
69b16a5f TH |
752 | * |
753 | * LOCKING: | |
754 | * EH context. | |
755 | * | |
756 | * RETURNS: | |
757 | * 0 on success, -errno on failure. | |
7ea1fbc2 | 758 | */ |
6746544c | 759 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 760 | { |
9af5c9c9 | 761 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 762 | int err; |
3a32a8e9 TH |
763 | acpi_status status; |
764 | struct acpi_object_list input; | |
765 | union acpi_object in_params[1]; | |
7ea1fbc2 | 766 | |
7ea1fbc2 | 767 | if (ata_msg_probe(ap)) |
3a32a8e9 TH |
768 | ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n", |
769 | __FUNCTION__, dev->devno, ap->port_no); | |
7ea1fbc2 | 770 | |
7ea1fbc2 KCA |
771 | /* Give the drive Identify data to the drive via the _SDD method */ |
772 | /* _SDD: set up input parameters */ | |
773 | input.count = 1; | |
774 | input.pointer = in_params; | |
775 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
776 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
777 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
778 | /* Output buffer: _SDD has no output */ |
779 | ||
780 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 781 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
fafbae87 | 782 | status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL); |
3a32a8e9 | 783 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 KCA |
784 | |
785 | err = ACPI_FAILURE(status) ? -EIO : 0; | |
69b16a5f TH |
786 | if (err < 0) |
787 | ata_dev_printk(dev, KERN_WARNING, | |
788 | "ACPI _SDD failed (AE 0x%x)\n", status); | |
7ea1fbc2 | 789 | |
6746544c TH |
790 | return err; |
791 | } | |
792 | ||
64578a3d TH |
793 | /** |
794 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
795 | * @ap: target ATA port | |
796 | * | |
797 | * This function is called when @ap is about to be suspended. All | |
798 | * devices are already put to sleep but the port_suspend() callback | |
799 | * hasn't been executed yet. Error return from this function aborts | |
800 | * suspend. | |
801 | * | |
802 | * LOCKING: | |
803 | * EH context. | |
804 | * | |
805 | * RETURNS: | |
806 | * 0 on success, -errno on failure. | |
807 | */ | |
808 | int ata_acpi_on_suspend(struct ata_port *ap) | |
809 | { | |
c05e6ff0 TH |
810 | /* nada */ |
811 | return 0; | |
64578a3d TH |
812 | } |
813 | ||
6746544c TH |
814 | /** |
815 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
816 | * @ap: target ATA port | |
817 | * | |
818 | * This function is called when @ap is resumed - right after port | |
819 | * itself is resumed but before any EH action is taken. | |
820 | * | |
821 | * LOCKING: | |
822 | * EH context. | |
823 | */ | |
824 | void ata_acpi_on_resume(struct ata_port *ap) | |
825 | { | |
c05e6ff0 | 826 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
f58229f8 | 827 | struct ata_device *dev; |
6746544c | 828 | |
398e0782 TH |
829 | if (ap->acpi_handle && gtm) { |
830 | /* _GTM valid */ | |
831 | ||
832 | /* restore timing parameters */ | |
c05e6ff0 | 833 | ata_acpi_stm(ap, gtm); |
64578a3d | 834 | |
398e0782 TH |
835 | /* _GTF should immediately follow _STM so that it can |
836 | * use values set by _STM. Cache _GTF result and | |
837 | * schedule _GTF. | |
838 | */ | |
839 | ata_link_for_each_dev(dev, &ap->link) { | |
840 | ata_acpi_clear_gtf(dev); | |
841 | if (ata_dev_get_GTF(dev, NULL) >= 0) | |
842 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
843 | } | |
844 | } else { | |
845 | /* SATA _GTF needs to be evaulated after _SDD and | |
846 | * there's no reason to evaluate IDE _GTF early | |
847 | * without _STM. Clear cache and schedule _GTF. | |
848 | */ | |
849 | ata_link_for_each_dev(dev, &ap->link) { | |
850 | ata_acpi_clear_gtf(dev); | |
851 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
852 | } | |
853 | } | |
7ea1fbc2 KCA |
854 | } |
855 | ||
bd3adca5 SL |
856 | /** |
857 | * ata_acpi_set_state - set the port power state | |
858 | * @ap: target ATA port | |
859 | * @state: state, on/off | |
860 | * | |
861 | * This function executes the _PS0/_PS3 ACPI method to set the power state. | |
862 | * ACPI spec requires _PS0 when IDE power on and _PS3 when power off | |
863 | */ | |
864 | void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) | |
865 | { | |
866 | struct ata_device *dev; | |
867 | ||
868 | if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA)) | |
869 | return; | |
870 | ||
871 | /* channel first and then drives for power on and vica versa | |
872 | for power off */ | |
873 | if (state.event == PM_EVENT_ON) | |
874 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0); | |
875 | ||
876 | ata_link_for_each_dev(dev, &ap->link) { | |
877 | if (dev->acpi_handle && ata_dev_enabled(dev)) | |
878 | acpi_bus_set_power(dev->acpi_handle, | |
879 | state.event == PM_EVENT_ON ? | |
880 | ACPI_STATE_D0 : ACPI_STATE_D3); | |
881 | } | |
882 | if (state.event != PM_EVENT_ON) | |
883 | acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3); | |
884 | } | |
885 | ||
6746544c TH |
886 | /** |
887 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
888 | * @dev: target ATA device | |
889 | * | |
890 | * This function is called when @dev is about to be configured. | |
891 | * IDENTIFY data might have been modified after this hook is run. | |
892 | * | |
893 | * LOCKING: | |
894 | * EH context. | |
895 | * | |
896 | * RETURNS: | |
897 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
898 | * -errno on failure. | |
899 | */ | |
900 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
901 | { | |
9af5c9c9 TH |
902 | struct ata_port *ap = dev->link->ap; |
903 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
6746544c | 904 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
66fa7f21 | 905 | int nr_executed = 0; |
6746544c TH |
906 | int rc; |
907 | ||
6746544c TH |
908 | if (!dev->acpi_handle) |
909 | return 0; | |
910 | ||
911 | /* do we need to do _GTF? */ | |
912 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
913 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
914 | return 0; | |
915 | ||
916 | /* do _SDD if SATA */ | |
917 | if (acpi_sata) { | |
918 | rc = ata_acpi_push_id(dev); | |
919 | if (rc) | |
920 | goto acpi_err; | |
921 | } | |
922 | ||
923 | /* do _GTF */ | |
66fa7f21 TH |
924 | rc = ata_acpi_exec_tfs(dev, &nr_executed); |
925 | if (rc) | |
6746544c TH |
926 | goto acpi_err; |
927 | ||
928 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
929 | ||
930 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
66fa7f21 | 931 | if (nr_executed) { |
6746544c TH |
932 | rc = ata_dev_reread_id(dev, 0); |
933 | if (rc < 0) { | |
934 | ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY " | |
935 | "after ACPI commands\n"); | |
936 | return rc; | |
937 | } | |
938 | } | |
939 | ||
940 | return 0; | |
941 | ||
942 | acpi_err: | |
66fa7f21 TH |
943 | /* ignore evaluation failure if we can continue safely */ |
944 | if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
945 | return 0; | |
6746544c | 946 | |
66fa7f21 TH |
947 | /* fail and let EH retry once more for unknown IO errors */ |
948 | if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { | |
949 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
950 | return rc; | |
6746544c | 951 | } |
66fa7f21 TH |
952 | |
953 | ata_dev_printk(dev, KERN_WARNING, | |
954 | "ACPI: failed the second time, disabled\n"); | |
955 | dev->acpi_handle = NULL; | |
956 | ||
957 | /* We can safely continue if no _GTF command has been executed | |
958 | * and port is not frozen. | |
959 | */ | |
960 | if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
961 | return 0; | |
962 | ||
6746544c TH |
963 | return rc; |
964 | } | |
562f0c2d TH |
965 | |
966 | /** | |
967 | * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled | |
968 | * @dev: target ATA device | |
969 | * | |
970 | * This function is called when @dev is about to be disabled. | |
971 | * | |
972 | * LOCKING: | |
973 | * EH context. | |
974 | */ | |
975 | void ata_acpi_on_disable(struct ata_device *dev) | |
976 | { | |
398e0782 | 977 | ata_acpi_clear_gtf(dev); |
562f0c2d | 978 | } |