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Commit | Line | Data |
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11ef697b KCA |
1 | /* |
2 | * libata-acpi.c | |
3 | * Provides ACPI support for PATA/SATA. | |
4 | * | |
5 | * Copyright (C) 2006 Intel Corp. | |
6 | * Copyright (C) 2006 Randy Dunlap | |
7 | */ | |
8 | ||
9 | #include <linux/ata.h> | |
10 | #include <linux/delay.h> | |
11 | #include <linux/device.h> | |
12 | #include <linux/errno.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/acpi.h> | |
15 | #include <linux/libata.h> | |
16 | #include <linux/pci.h> | |
237d8440 | 17 | #include <scsi/scsi_device.h> |
11ef697b KCA |
18 | #include "libata.h" |
19 | ||
20 | #include <acpi/acpi_bus.h> | |
21 | #include <acpi/acnames.h> | |
22 | #include <acpi/acnamesp.h> | |
23 | #include <acpi/acparser.h> | |
24 | #include <acpi/acexcep.h> | |
25 | #include <acpi/acmacros.h> | |
26 | #include <acpi/actypes.h> | |
27 | ||
11ef697b | 28 | #define NO_PORT_MULT 0xffff |
2dcb407e | 29 | #define SATA_ADR(root, pmp) (((root) << 16) | (pmp)) |
11ef697b KCA |
30 | |
31 | #define REGS_PER_GTF 7 | |
4700c4bc TH |
32 | struct ata_acpi_gtf { |
33 | u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
34 | } __packed; | |
11ef697b | 35 | |
ca426635 AC |
36 | /* |
37 | * Helper - belongs in the PCI layer somewhere eventually | |
38 | */ | |
39 | static int is_pci_dev(struct device *dev) | |
40 | { | |
41 | return (dev->bus == &pci_bus_type); | |
42 | } | |
11ef697b | 43 | |
398e0782 TH |
44 | static void ata_acpi_clear_gtf(struct ata_device *dev) |
45 | { | |
46 | kfree(dev->gtf_cache); | |
47 | dev->gtf_cache = NULL; | |
48 | } | |
49 | ||
d0df8b5d TH |
50 | /** |
51 | * ata_acpi_associate_sata_port - associate SATA port with ACPI objects | |
52 | * @ap: target SATA port | |
53 | * | |
54 | * Look up ACPI objects associated with @ap and initialize acpi_handle | |
55 | * fields of @ap, the port and devices accordingly. | |
56 | * | |
57 | * LOCKING: | |
58 | * EH context. | |
59 | * | |
60 | * RETURNS: | |
61 | * 0 on success, -errno on failure. | |
62 | */ | |
63 | void ata_acpi_associate_sata_port(struct ata_port *ap) | |
11ef697b | 64 | { |
d0df8b5d TH |
65 | WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA)); |
66 | ||
67 | if (!ap->nr_pmp_links) { | |
68 | acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT); | |
69 | ||
70 | ap->link.device->acpi_handle = | |
71 | acpi_get_child(ap->host->acpi_handle, adr); | |
72 | } else { | |
73 | struct ata_link *link; | |
74 | ||
75 | ap->link.device->acpi_handle = NULL; | |
76 | ||
77 | ata_port_for_each_link(link, ap) { | |
78 | acpi_integer adr = SATA_ADR(ap->port_no, link->pmp); | |
fafbae87 | 79 | |
d0df8b5d TH |
80 | link->device->acpi_handle = |
81 | acpi_get_child(ap->host->acpi_handle, adr); | |
82 | } | |
83 | } | |
11ef697b KCA |
84 | } |
85 | ||
fafbae87 | 86 | static void ata_acpi_associate_ide_port(struct ata_port *ap) |
11ef697b | 87 | { |
fafbae87 | 88 | int max_devices, i; |
11ef697b | 89 | |
fafbae87 TH |
90 | ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no); |
91 | if (!ap->acpi_handle) | |
92 | return; | |
11ef697b | 93 | |
fafbae87 TH |
94 | max_devices = 1; |
95 | if (ap->flags & ATA_FLAG_SLAVE_POSS) | |
96 | max_devices++; | |
11ef697b | 97 | |
fafbae87 | 98 | for (i = 0; i < max_devices; i++) { |
9af5c9c9 | 99 | struct ata_device *dev = &ap->link.device[i]; |
11ef697b | 100 | |
fafbae87 | 101 | dev->acpi_handle = acpi_get_child(ap->acpi_handle, i); |
11ef697b | 102 | } |
c05e6ff0 TH |
103 | |
104 | if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0) | |
105 | ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; | |
11ef697b KCA |
106 | } |
107 | ||
2dcb407e JG |
108 | static void ata_acpi_handle_hotplug(struct ata_port *ap, struct kobject *kobj, |
109 | u32 event) | |
237d8440 MG |
110 | { |
111 | char event_string[12]; | |
112 | char *envp[] = { event_string, NULL }; | |
113 | struct ata_eh_info *ehi = &ap->link.eh_info; | |
114 | ||
115 | if (event == 0 || event == 1) { | |
116 | unsigned long flags; | |
117 | spin_lock_irqsave(ap->lock, flags); | |
118 | ata_ehi_clear_desc(ehi); | |
119 | ata_ehi_push_desc(ehi, "ACPI event"); | |
120 | ata_ehi_hotplugged(ehi); | |
121 | ata_port_freeze(ap); | |
122 | spin_unlock_irqrestore(ap->lock, flags); | |
123 | } | |
124 | ||
125 | if (kobj) { | |
2dcb407e | 126 | sprintf(event_string, "BAY_EVENT=%d", event); |
237d8440 MG |
127 | kobject_uevent_env(kobj, KOBJ_CHANGE, envp); |
128 | } | |
129 | } | |
130 | ||
131 | static void ata_acpi_dev_notify(acpi_handle handle, u32 event, void *data) | |
132 | { | |
133 | struct ata_device *dev = data; | |
134 | struct kobject *kobj = NULL; | |
135 | ||
136 | if (dev->sdev) | |
137 | kobj = &dev->sdev->sdev_gendev.kobj; | |
138 | ||
2dcb407e | 139 | ata_acpi_handle_hotplug(dev->link->ap, kobj, event); |
237d8440 MG |
140 | } |
141 | ||
142 | static void ata_acpi_ap_notify(acpi_handle handle, u32 event, void *data) | |
143 | { | |
144 | struct ata_port *ap = data; | |
145 | ||
2dcb407e | 146 | ata_acpi_handle_hotplug(ap, &ap->dev->kobj, event); |
237d8440 MG |
147 | } |
148 | ||
fafbae87 TH |
149 | /** |
150 | * ata_acpi_associate - associate ATA host with ACPI objects | |
151 | * @host: target ATA host | |
152 | * | |
153 | * Look up ACPI objects associated with @host and initialize | |
154 | * acpi_handle fields of @host, its ports and devices accordingly. | |
155 | * | |
156 | * LOCKING: | |
157 | * EH context. | |
158 | * | |
159 | * RETURNS: | |
160 | * 0 on success, -errno on failure. | |
161 | */ | |
162 | void ata_acpi_associate(struct ata_host *host) | |
11ef697b | 163 | { |
237d8440 | 164 | int i, j; |
11ef697b | 165 | |
fafbae87 TH |
166 | if (!is_pci_dev(host->dev) || libata_noacpi) |
167 | return; | |
11ef697b | 168 | |
fafbae87 TH |
169 | host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev); |
170 | if (!host->acpi_handle) | |
171 | return; | |
11ef697b | 172 | |
fafbae87 TH |
173 | for (i = 0; i < host->n_ports; i++) { |
174 | struct ata_port *ap = host->ports[i]; | |
175 | ||
176 | if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA) | |
177 | ata_acpi_associate_sata_port(ap); | |
178 | else | |
179 | ata_acpi_associate_ide_port(ap); | |
237d8440 MG |
180 | |
181 | if (ap->acpi_handle) | |
182 | acpi_install_notify_handler (ap->acpi_handle, | |
183 | ACPI_SYSTEM_NOTIFY, | |
184 | ata_acpi_ap_notify, | |
185 | ap); | |
186 | ||
187 | for (j = 0; j < ata_link_max_devices(&ap->link); j++) { | |
188 | struct ata_device *dev = &ap->link.device[j]; | |
189 | ||
190 | if (dev->acpi_handle) | |
191 | acpi_install_notify_handler (dev->acpi_handle, | |
192 | ACPI_SYSTEM_NOTIFY, | |
193 | ata_acpi_dev_notify, | |
194 | dev); | |
195 | } | |
11ef697b | 196 | } |
11ef697b KCA |
197 | } |
198 | ||
562f0c2d TH |
199 | /** |
200 | * ata_acpi_dissociate - dissociate ATA host from ACPI objects | |
201 | * @host: target ATA host | |
202 | * | |
203 | * This function is called during driver detach after the whole host | |
204 | * is shut down. | |
205 | * | |
206 | * LOCKING: | |
207 | * EH context. | |
208 | */ | |
209 | void ata_acpi_dissociate(struct ata_host *host) | |
210 | { | |
c05e6ff0 TH |
211 | int i; |
212 | ||
213 | /* Restore initial _GTM values so that driver which attaches | |
214 | * afterward can use them too. | |
215 | */ | |
216 | for (i = 0; i < host->n_ports; i++) { | |
217 | struct ata_port *ap = host->ports[i]; | |
218 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); | |
219 | ||
220 | if (ap->acpi_handle && gtm) | |
221 | ata_acpi_stm(ap, gtm); | |
222 | } | |
562f0c2d TH |
223 | } |
224 | ||
64578a3d TH |
225 | /** |
226 | * ata_acpi_gtm - execute _GTM | |
227 | * @ap: target ATA port | |
228 | * @gtm: out parameter for _GTM result | |
229 | * | |
230 | * Evaluate _GTM and store the result in @gtm. | |
231 | * | |
232 | * LOCKING: | |
233 | * EH context. | |
234 | * | |
235 | * RETURNS: | |
236 | * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure. | |
237 | */ | |
0d02f0b2 | 238 | int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm) |
64578a3d TH |
239 | { |
240 | struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER }; | |
241 | union acpi_object *out_obj; | |
242 | acpi_status status; | |
243 | int rc = 0; | |
244 | ||
245 | status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output); | |
246 | ||
247 | rc = -ENOENT; | |
248 | if (status == AE_NOT_FOUND) | |
249 | goto out_free; | |
250 | ||
251 | rc = -EINVAL; | |
252 | if (ACPI_FAILURE(status)) { | |
253 | ata_port_printk(ap, KERN_ERR, | |
254 | "ACPI get timing mode failed (AE 0x%x)\n", | |
255 | status); | |
256 | goto out_free; | |
257 | } | |
258 | ||
259 | out_obj = output.pointer; | |
260 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
261 | ata_port_printk(ap, KERN_WARNING, | |
262 | "_GTM returned unexpected object type 0x%x\n", | |
263 | out_obj->type); | |
264 | ||
265 | goto out_free; | |
266 | } | |
267 | ||
268 | if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) { | |
269 | ata_port_printk(ap, KERN_ERR, | |
270 | "_GTM returned invalid length %d\n", | |
271 | out_obj->buffer.length); | |
272 | goto out_free; | |
273 | } | |
274 | ||
275 | memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm)); | |
276 | rc = 0; | |
277 | out_free: | |
278 | kfree(output.pointer); | |
279 | return rc; | |
280 | } | |
281 | ||
badff03d AC |
282 | EXPORT_SYMBOL_GPL(ata_acpi_gtm); |
283 | ||
64578a3d TH |
284 | /** |
285 | * ata_acpi_stm - execute _STM | |
286 | * @ap: target ATA port | |
287 | * @stm: timing parameter to _STM | |
288 | * | |
289 | * Evaluate _STM with timing parameter @stm. | |
290 | * | |
291 | * LOCKING: | |
292 | * EH context. | |
293 | * | |
294 | * RETURNS: | |
295 | * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure. | |
296 | */ | |
0d02f0b2 | 297 | int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm) |
64578a3d TH |
298 | { |
299 | acpi_status status; | |
0d02f0b2 | 300 | struct ata_acpi_gtm stm_buf = *stm; |
64578a3d TH |
301 | struct acpi_object_list input; |
302 | union acpi_object in_params[3]; | |
303 | ||
304 | in_params[0].type = ACPI_TYPE_BUFFER; | |
305 | in_params[0].buffer.length = sizeof(struct ata_acpi_gtm); | |
0d02f0b2 | 306 | in_params[0].buffer.pointer = (u8 *)&stm_buf; |
64578a3d TH |
307 | /* Buffers for id may need byteswapping ? */ |
308 | in_params[1].type = ACPI_TYPE_BUFFER; | |
309 | in_params[1].buffer.length = 512; | |
9af5c9c9 | 310 | in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id; |
64578a3d TH |
311 | in_params[2].type = ACPI_TYPE_BUFFER; |
312 | in_params[2].buffer.length = 512; | |
9af5c9c9 | 313 | in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id; |
64578a3d TH |
314 | |
315 | input.count = 3; | |
316 | input.pointer = in_params; | |
317 | ||
318 | status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL); | |
319 | ||
320 | if (status == AE_NOT_FOUND) | |
321 | return -ENOENT; | |
322 | if (ACPI_FAILURE(status)) { | |
323 | ata_port_printk(ap, KERN_ERR, | |
324 | "ACPI set timing mode failed (status=0x%x)\n", status); | |
325 | return -EINVAL; | |
326 | } | |
327 | return 0; | |
328 | } | |
329 | ||
badff03d AC |
330 | EXPORT_SYMBOL_GPL(ata_acpi_stm); |
331 | ||
11ef697b | 332 | /** |
4700c4bc | 333 | * ata_dev_get_GTF - get the drive bootup default taskfile settings |
3a32a8e9 | 334 | * @dev: target ATA device |
4700c4bc | 335 | * @gtf: output parameter for buffer containing _GTF taskfile arrays |
11ef697b KCA |
336 | * |
337 | * This applies to both PATA and SATA drives. | |
338 | * | |
339 | * The _GTF method has no input parameters. | |
340 | * It returns a variable number of register set values (registers | |
341 | * hex 1F1..1F7, taskfiles). | |
342 | * The <variable number> is not known in advance, so have ACPI-CA | |
343 | * allocate the buffer as needed and return it, then free it later. | |
344 | * | |
4700c4bc TH |
345 | * LOCKING: |
346 | * EH context. | |
347 | * | |
348 | * RETURNS: | |
66fa7f21 TH |
349 | * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL |
350 | * if _GTF is invalid. | |
11ef697b | 351 | */ |
398e0782 | 352 | static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) |
11ef697b | 353 | { |
9af5c9c9 | 354 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 355 | acpi_status status; |
3a32a8e9 TH |
356 | struct acpi_buffer output; |
357 | union acpi_object *out_obj; | |
4700c4bc | 358 | int rc = 0; |
11ef697b | 359 | |
398e0782 TH |
360 | /* if _GTF is cached, use the cached value */ |
361 | if (dev->gtf_cache) { | |
362 | out_obj = dev->gtf_cache; | |
363 | goto done; | |
364 | } | |
365 | ||
4700c4bc TH |
366 | /* set up output buffer */ |
367 | output.length = ACPI_ALLOCATE_BUFFER; | |
368 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
11ef697b | 369 | |
11ef697b | 370 | if (ata_msg_probe(ap)) |
3a32a8e9 | 371 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n", |
878d4fed | 372 | __FUNCTION__, ap->port_no); |
11ef697b | 373 | |
11ef697b | 374 | /* _GTF has no input parameters */ |
4700c4bc | 375 | status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output); |
398e0782 | 376 | out_obj = dev->gtf_cache = output.pointer; |
4700c4bc | 377 | |
11ef697b | 378 | if (ACPI_FAILURE(status)) { |
4700c4bc TH |
379 | if (status != AE_NOT_FOUND) { |
380 | ata_dev_printk(dev, KERN_WARNING, | |
381 | "_GTF evaluation failed (AE 0x%x)\n", | |
382 | status); | |
66fa7f21 | 383 | rc = -EINVAL; |
4700c4bc TH |
384 | } |
385 | goto out_free; | |
11ef697b KCA |
386 | } |
387 | ||
388 | if (!output.length || !output.pointer) { | |
389 | if (ata_msg_probe(ap)) | |
3a32a8e9 | 390 | ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: " |
11ef697b KCA |
391 | "length or ptr is NULL (0x%llx, 0x%p)\n", |
392 | __FUNCTION__, | |
393 | (unsigned long long)output.length, | |
394 | output.pointer); | |
66fa7f21 | 395 | rc = -EINVAL; |
4700c4bc | 396 | goto out_free; |
11ef697b KCA |
397 | } |
398 | ||
11ef697b | 399 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
69b16a5f TH |
400 | ata_dev_printk(dev, KERN_WARNING, |
401 | "_GTF unexpected object type 0x%x\n", | |
402 | out_obj->type); | |
66fa7f21 | 403 | rc = -EINVAL; |
4700c4bc | 404 | goto out_free; |
11ef697b KCA |
405 | } |
406 | ||
4700c4bc | 407 | if (out_obj->buffer.length % REGS_PER_GTF) { |
69b16a5f TH |
408 | ata_dev_printk(dev, KERN_WARNING, |
409 | "unexpected _GTF length (%d)\n", | |
410 | out_obj->buffer.length); | |
66fa7f21 | 411 | rc = -EINVAL; |
4700c4bc | 412 | goto out_free; |
11ef697b KCA |
413 | } |
414 | ||
398e0782 | 415 | done: |
4700c4bc | 416 | rc = out_obj->buffer.length / REGS_PER_GTF; |
398e0782 TH |
417 | if (gtf) { |
418 | *gtf = (void *)out_obj->buffer.pointer; | |
419 | if (ata_msg_probe(ap)) | |
420 | ata_dev_printk(dev, KERN_DEBUG, | |
421 | "%s: returning gtf=%p, gtf_count=%d\n", | |
422 | __FUNCTION__, *gtf, rc); | |
423 | } | |
4700c4bc TH |
424 | return rc; |
425 | ||
426 | out_free: | |
398e0782 | 427 | ata_acpi_clear_gtf(dev); |
4700c4bc | 428 | return rc; |
11ef697b KCA |
429 | } |
430 | ||
e1ddb4b6 AC |
431 | /** |
432 | * ata_acpi_cbl_80wire - Check for 80 wire cable | |
433 | * @ap: Port to check | |
434 | * | |
435 | * Return 1 if the ACPI mode data for this port indicates the BIOS selected | |
436 | * an 80wire mode. | |
437 | */ | |
438 | ||
439 | int ata_acpi_cbl_80wire(struct ata_port *ap) | |
440 | { | |
c05e6ff0 | 441 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
e1ddb4b6 | 442 | int valid = 0; |
2dcb407e | 443 | |
c05e6ff0 | 444 | if (!gtm) |
e1ddb4b6 | 445 | return 0; |
2dcb407e | 446 | |
e1ddb4b6 | 447 | /* Split timing, DMA enabled */ |
c05e6ff0 | 448 | if ((gtm->flags & 0x11) == 0x11 && gtm->drive[0].dma < 55) |
e1ddb4b6 | 449 | valid |= 1; |
c05e6ff0 | 450 | if ((gtm->flags & 0x14) == 0x14 && gtm->drive[1].dma < 55) |
e1ddb4b6 AC |
451 | valid |= 2; |
452 | /* Shared timing, DMA enabled */ | |
c05e6ff0 | 453 | if ((gtm->flags & 0x11) == 0x01 && gtm->drive[0].dma < 55) |
e1ddb4b6 | 454 | valid |= 1; |
c05e6ff0 | 455 | if ((gtm->flags & 0x14) == 0x04 && gtm->drive[0].dma < 55) |
e1ddb4b6 AC |
456 | valid |= 2; |
457 | ||
458 | /* Drive check */ | |
459 | if ((valid & 1) && ata_dev_enabled(&ap->link.device[0])) | |
460 | return 1; | |
461 | if ((valid & 2) && ata_dev_enabled(&ap->link.device[1])) | |
462 | return 1; | |
463 | return 0; | |
464 | } | |
465 | ||
466 | EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); | |
467 | ||
11ef697b | 468 | /** |
0e8634bf | 469 | * ata_acpi_run_tf - send taskfile registers to host controller |
3a32a8e9 | 470 | * @dev: target ATA device |
11ef697b KCA |
471 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
472 | * | |
473 | * Outputs ATA taskfile to standard ATA host controller using MMIO | |
474 | * or PIO as indicated by the ATA_FLAG_MMIO flag. | |
475 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. | |
476 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
477 | * hob_lbal, hob_lbam, and hob_lbah. | |
478 | * | |
479 | * This function waits for idle (!BUSY and !DRQ) after writing | |
480 | * registers. If the control register has a new value, this | |
481 | * function also waits for idle after writing control and before | |
482 | * writing the remaining registers. | |
483 | * | |
4700c4bc TH |
484 | * LOCKING: |
485 | * EH context. | |
486 | * | |
487 | * RETURNS: | |
0e8634bf TH |
488 | * 1 if command is executed successfully. 0 if ignored or rejected, |
489 | * -errno on other errors. | |
11ef697b | 490 | */ |
0e8634bf TH |
491 | static int ata_acpi_run_tf(struct ata_device *dev, |
492 | const struct ata_acpi_gtf *gtf) | |
11ef697b | 493 | { |
4700c4bc TH |
494 | struct ata_taskfile tf, rtf; |
495 | unsigned int err_mask; | |
0e8634bf TH |
496 | const char *level; |
497 | char msg[60]; | |
498 | int rc; | |
fc16c25f | 499 | |
4700c4bc TH |
500 | if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0) |
501 | && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0) | |
502 | && (gtf->tf[6] == 0)) | |
503 | return 0; | |
11ef697b | 504 | |
3a32a8e9 | 505 | ata_tf_init(dev, &tf); |
fc16c25f JG |
506 | |
507 | /* convert gtf to tf */ | |
508 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; /* TBD */ | |
48be6b18 | 509 | tf.protocol = ATA_PROT_NODATA; |
4700c4bc TH |
510 | tf.feature = gtf->tf[0]; /* 0x1f1 */ |
511 | tf.nsect = gtf->tf[1]; /* 0x1f2 */ | |
512 | tf.lbal = gtf->tf[2]; /* 0x1f3 */ | |
513 | tf.lbam = gtf->tf[3]; /* 0x1f4 */ | |
514 | tf.lbah = gtf->tf[4]; /* 0x1f5 */ | |
515 | tf.device = gtf->tf[5]; /* 0x1f6 */ | |
516 | tf.command = gtf->tf[6]; /* 0x1f7 */ | |
517 | ||
4700c4bc | 518 | rtf = tf; |
2b789108 | 519 | err_mask = ata_exec_internal(dev, &rtf, NULL, DMA_NONE, NULL, 0, 0); |
0e8634bf TH |
520 | |
521 | switch (err_mask) { | |
522 | case 0: | |
523 | level = KERN_DEBUG; | |
524 | snprintf(msg, sizeof(msg), "succeeded"); | |
525 | rc = 1; | |
526 | break; | |
527 | ||
528 | case AC_ERR_DEV: | |
529 | level = KERN_INFO; | |
530 | snprintf(msg, sizeof(msg), | |
531 | "rejected by device (Stat=0x%02x Err=0x%02x)", | |
532 | rtf.command, rtf.feature); | |
533 | rc = 0; | |
534 | break; | |
535 | ||
536 | default: | |
537 | level = KERN_ERR; | |
538 | snprintf(msg, sizeof(msg), | |
539 | "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", | |
540 | err_mask, rtf.command, rtf.feature); | |
541 | rc = -EIO; | |
542 | break; | |
4700c4bc TH |
543 | } |
544 | ||
0e8634bf TH |
545 | ata_dev_printk(dev, level, |
546 | "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x %s\n", | |
547 | tf.command, tf.feature, tf.nsect, tf.lbal, | |
548 | tf.lbam, tf.lbah, tf.device, msg); | |
549 | ||
550 | return rc; | |
11ef697b KCA |
551 | } |
552 | ||
11ef697b KCA |
553 | /** |
554 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
6746544c | 555 | * @dev: target ATA device |
66fa7f21 | 556 | * @nr_executed: out paramter for the number of executed commands |
11ef697b | 557 | * |
6746544c | 558 | * Evaluate _GTF and excute returned taskfiles. |
69b16a5f TH |
559 | * |
560 | * LOCKING: | |
561 | * EH context. | |
562 | * | |
563 | * RETURNS: | |
66fa7f21 TH |
564 | * Number of executed taskfiles on success, 0 if _GTF doesn't exist. |
565 | * -errno on other errors. | |
11ef697b | 566 | */ |
66fa7f21 | 567 | static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed) |
11ef697b | 568 | { |
6746544c | 569 | struct ata_acpi_gtf *gtf = NULL; |
6746544c TH |
570 | int gtf_count, i, rc; |
571 | ||
572 | /* get taskfiles */ | |
66fa7f21 TH |
573 | rc = ata_dev_get_GTF(dev, >f); |
574 | if (rc < 0) | |
575 | return rc; | |
576 | gtf_count = rc; | |
6746544c TH |
577 | |
578 | /* execute them */ | |
0e8634bf TH |
579 | for (i = 0; i < gtf_count; i++) { |
580 | rc = ata_acpi_run_tf(dev, gtf++); | |
581 | if (rc < 0) | |
582 | break; | |
583 | if (rc) | |
584 | (*nr_executed)++; | |
11ef697b KCA |
585 | } |
586 | ||
398e0782 | 587 | ata_acpi_clear_gtf(dev); |
6746544c | 588 | |
0e8634bf TH |
589 | if (rc < 0) |
590 | return rc; | |
591 | return 0; | |
11ef697b KCA |
592 | } |
593 | ||
7ea1fbc2 KCA |
594 | /** |
595 | * ata_acpi_push_id - send Identify data to drive | |
3a32a8e9 | 596 | * @dev: target ATA device |
7ea1fbc2 KCA |
597 | * |
598 | * _SDD ACPI object: for SATA mode only | |
599 | * Must be after Identify (Packet) Device -- uses its data | |
600 | * ATM this function never returns a failure. It is an optional | |
601 | * method and if it fails for whatever reason, we should still | |
602 | * just keep going. | |
69b16a5f TH |
603 | * |
604 | * LOCKING: | |
605 | * EH context. | |
606 | * | |
607 | * RETURNS: | |
608 | * 0 on success, -errno on failure. | |
7ea1fbc2 | 609 | */ |
6746544c | 610 | static int ata_acpi_push_id(struct ata_device *dev) |
7ea1fbc2 | 611 | { |
9af5c9c9 | 612 | struct ata_port *ap = dev->link->ap; |
3a32a8e9 | 613 | int err; |
3a32a8e9 TH |
614 | acpi_status status; |
615 | struct acpi_object_list input; | |
616 | union acpi_object in_params[1]; | |
7ea1fbc2 | 617 | |
7ea1fbc2 | 618 | if (ata_msg_probe(ap)) |
3a32a8e9 TH |
619 | ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n", |
620 | __FUNCTION__, dev->devno, ap->port_no); | |
7ea1fbc2 | 621 | |
7ea1fbc2 KCA |
622 | /* Give the drive Identify data to the drive via the _SDD method */ |
623 | /* _SDD: set up input parameters */ | |
624 | input.count = 1; | |
625 | input.pointer = in_params; | |
626 | in_params[0].type = ACPI_TYPE_BUFFER; | |
3a32a8e9 TH |
627 | in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS; |
628 | in_params[0].buffer.pointer = (u8 *)dev->id; | |
7ea1fbc2 KCA |
629 | /* Output buffer: _SDD has no output */ |
630 | ||
631 | /* It's OK for _SDD to be missing too. */ | |
3a32a8e9 | 632 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
fafbae87 | 633 | status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL); |
3a32a8e9 | 634 | swap_buf_le16(dev->id, ATA_ID_WORDS); |
7ea1fbc2 KCA |
635 | |
636 | err = ACPI_FAILURE(status) ? -EIO : 0; | |
69b16a5f TH |
637 | if (err < 0) |
638 | ata_dev_printk(dev, KERN_WARNING, | |
639 | "ACPI _SDD failed (AE 0x%x)\n", status); | |
7ea1fbc2 | 640 | |
6746544c TH |
641 | return err; |
642 | } | |
643 | ||
64578a3d TH |
644 | /** |
645 | * ata_acpi_on_suspend - ATA ACPI hook called on suspend | |
646 | * @ap: target ATA port | |
647 | * | |
648 | * This function is called when @ap is about to be suspended. All | |
649 | * devices are already put to sleep but the port_suspend() callback | |
650 | * hasn't been executed yet. Error return from this function aborts | |
651 | * suspend. | |
652 | * | |
653 | * LOCKING: | |
654 | * EH context. | |
655 | * | |
656 | * RETURNS: | |
657 | * 0 on success, -errno on failure. | |
658 | */ | |
659 | int ata_acpi_on_suspend(struct ata_port *ap) | |
660 | { | |
c05e6ff0 TH |
661 | /* nada */ |
662 | return 0; | |
64578a3d TH |
663 | } |
664 | ||
6746544c TH |
665 | /** |
666 | * ata_acpi_on_resume - ATA ACPI hook called on resume | |
667 | * @ap: target ATA port | |
668 | * | |
669 | * This function is called when @ap is resumed - right after port | |
670 | * itself is resumed but before any EH action is taken. | |
671 | * | |
672 | * LOCKING: | |
673 | * EH context. | |
674 | */ | |
675 | void ata_acpi_on_resume(struct ata_port *ap) | |
676 | { | |
c05e6ff0 | 677 | const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); |
f58229f8 | 678 | struct ata_device *dev; |
6746544c | 679 | |
398e0782 TH |
680 | if (ap->acpi_handle && gtm) { |
681 | /* _GTM valid */ | |
682 | ||
683 | /* restore timing parameters */ | |
c05e6ff0 | 684 | ata_acpi_stm(ap, gtm); |
64578a3d | 685 | |
398e0782 TH |
686 | /* _GTF should immediately follow _STM so that it can |
687 | * use values set by _STM. Cache _GTF result and | |
688 | * schedule _GTF. | |
689 | */ | |
690 | ata_link_for_each_dev(dev, &ap->link) { | |
691 | ata_acpi_clear_gtf(dev); | |
692 | if (ata_dev_get_GTF(dev, NULL) >= 0) | |
693 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
694 | } | |
695 | } else { | |
696 | /* SATA _GTF needs to be evaulated after _SDD and | |
697 | * there's no reason to evaluate IDE _GTF early | |
698 | * without _STM. Clear cache and schedule _GTF. | |
699 | */ | |
700 | ata_link_for_each_dev(dev, &ap->link) { | |
701 | ata_acpi_clear_gtf(dev); | |
702 | dev->flags |= ATA_DFLAG_ACPI_PENDING; | |
703 | } | |
704 | } | |
7ea1fbc2 KCA |
705 | } |
706 | ||
6746544c TH |
707 | /** |
708 | * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration | |
709 | * @dev: target ATA device | |
710 | * | |
711 | * This function is called when @dev is about to be configured. | |
712 | * IDENTIFY data might have been modified after this hook is run. | |
713 | * | |
714 | * LOCKING: | |
715 | * EH context. | |
716 | * | |
717 | * RETURNS: | |
718 | * Positive number if IDENTIFY data needs to be refreshed, 0 if not, | |
719 | * -errno on failure. | |
720 | */ | |
721 | int ata_acpi_on_devcfg(struct ata_device *dev) | |
722 | { | |
9af5c9c9 TH |
723 | struct ata_port *ap = dev->link->ap; |
724 | struct ata_eh_context *ehc = &ap->link.eh_context; | |
6746544c | 725 | int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA; |
66fa7f21 | 726 | int nr_executed = 0; |
6746544c TH |
727 | int rc; |
728 | ||
6746544c TH |
729 | if (!dev->acpi_handle) |
730 | return 0; | |
731 | ||
732 | /* do we need to do _GTF? */ | |
733 | if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) && | |
734 | !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET))) | |
735 | return 0; | |
736 | ||
737 | /* do _SDD if SATA */ | |
738 | if (acpi_sata) { | |
739 | rc = ata_acpi_push_id(dev); | |
740 | if (rc) | |
741 | goto acpi_err; | |
742 | } | |
743 | ||
744 | /* do _GTF */ | |
66fa7f21 TH |
745 | rc = ata_acpi_exec_tfs(dev, &nr_executed); |
746 | if (rc) | |
6746544c TH |
747 | goto acpi_err; |
748 | ||
749 | dev->flags &= ~ATA_DFLAG_ACPI_PENDING; | |
750 | ||
751 | /* refresh IDENTIFY page if any _GTF command has been executed */ | |
66fa7f21 | 752 | if (nr_executed) { |
6746544c TH |
753 | rc = ata_dev_reread_id(dev, 0); |
754 | if (rc < 0) { | |
755 | ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY " | |
756 | "after ACPI commands\n"); | |
757 | return rc; | |
758 | } | |
759 | } | |
760 | ||
761 | return 0; | |
762 | ||
763 | acpi_err: | |
66fa7f21 TH |
764 | /* ignore evaluation failure if we can continue safely */ |
765 | if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
766 | return 0; | |
6746544c | 767 | |
66fa7f21 TH |
768 | /* fail and let EH retry once more for unknown IO errors */ |
769 | if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) { | |
770 | dev->flags |= ATA_DFLAG_ACPI_FAILED; | |
771 | return rc; | |
6746544c | 772 | } |
66fa7f21 TH |
773 | |
774 | ata_dev_printk(dev, KERN_WARNING, | |
775 | "ACPI: failed the second time, disabled\n"); | |
776 | dev->acpi_handle = NULL; | |
777 | ||
778 | /* We can safely continue if no _GTF command has been executed | |
779 | * and port is not frozen. | |
780 | */ | |
781 | if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN)) | |
782 | return 0; | |
783 | ||
6746544c TH |
784 | return rc; |
785 | } | |
562f0c2d TH |
786 | |
787 | /** | |
788 | * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled | |
789 | * @dev: target ATA device | |
790 | * | |
791 | * This function is called when @dev is about to be disabled. | |
792 | * | |
793 | * LOCKING: | |
794 | * EH context. | |
795 | */ | |
796 | void ata_acpi_on_disable(struct ata_device *dev) | |
797 | { | |
398e0782 | 798 | ata_acpi_clear_gtf(dev); |
562f0c2d | 799 | } |