blob: 9e8ec19260afa71ae5426b943fb4c17db6a6da19 [file] [log] [blame]
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -07001/*
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
Tejun Heo3264a8d2007-12-15 15:05:06 +09009#include <linux/module.h>
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070010#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>
Matthew Garrett237d8442007-10-03 01:24:16 +010018#include <scsi/scsi_device.h>
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070019#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
Tejun Heo3264a8d2007-12-15 15:05:06 +090029enum {
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
37static unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT;
38module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644);
39MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock)");
40
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070041#define NO_PORT_MULT 0xffff
Jeff Garzik2dcb4072007-10-19 06:42:56 -040042#define SATA_ADR(root, pmp) (((root) << 16) | (pmp))
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070043
44#define REGS_PER_GTF 7
Tejun Heo4700c4b2007-05-15 03:28:16 +090045struct ata_acpi_gtf {
46 u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */
47} __packed;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070048
Alan Coxca426632007-03-08 23:13:50 +000049/*
50 * Helper - belongs in the PCI layer somewhere eventually
51 */
52static int is_pci_dev(struct device *dev)
53{
54 return (dev->bus == &pci_bus_type);
55}
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070056
Tejun Heo398e0782007-12-15 15:05:03 +090057static void ata_acpi_clear_gtf(struct ata_device *dev)
58{
59 kfree(dev->gtf_cache);
60 dev->gtf_cache = NULL;
61}
62
Tejun Heod0df8b5d2007-09-23 13:19:54 +090063/**
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 */
76void ata_acpi_associate_sata_port(struct ata_port *ap)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070077{
Tejun Heod0df8b5d2007-09-23 13:19:54 +090078 WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA));
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070079
Tejun Heod0df8b5d2007-09-23 13:19:54 +090080 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);
92
93 link->device->acpi_handle =
94 acpi_get_child(ap->host->acpi_handle, adr);
95 }
96 }
Tejun Heofafbae82007-05-15 03:28:16 +090097}
Alan Coxca426632007-03-08 23:13:50 +000098
Tejun Heofafbae82007-05-15 03:28:16 +090099static void ata_acpi_associate_ide_port(struct ata_port *ap)
100{
101 int max_devices, i;
102
103 ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no);
104 if (!ap->acpi_handle)
105 return;
106
107 max_devices = 1;
108 if (ap->flags & ATA_FLAG_SLAVE_POSS)
109 max_devices++;
110
111 for (i = 0; i < max_devices; i++) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900112 struct ata_device *dev = &ap->link.device[i];
Tejun Heofafbae82007-05-15 03:28:16 +0900113
114 dev->acpi_handle = acpi_get_child(ap->acpi_handle, i);
115 }
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900116
117 if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0)
118 ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700119}
120
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400121static void ata_acpi_handle_hotplug(struct ata_port *ap, struct kobject *kobj,
122 u32 event)
Matthew Garrett237d8442007-10-03 01:24:16 +0100123{
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) {
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400139 sprintf(event_string, "BAY_EVENT=%d", event);
Matthew Garrett237d8442007-10-03 01:24:16 +0100140 kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
141 }
142}
143
144static 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
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400152 ata_acpi_handle_hotplug(dev->link->ap, kobj, event);
Matthew Garrett237d8442007-10-03 01:24:16 +0100153}
154
155static void ata_acpi_ap_notify(acpi_handle handle, u32 event, void *data)
156{
157 struct ata_port *ap = data;
158
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400159 ata_acpi_handle_hotplug(ap, &ap->dev->kobj, event);
Matthew Garrett237d8442007-10-03 01:24:16 +0100160}
161
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700162/**
Tejun Heofafbae82007-05-15 03:28:16 +0900163 * ata_acpi_associate - associate ATA host with ACPI objects
164 * @host: target ATA host
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700165 *
Tejun Heofafbae82007-05-15 03:28:16 +0900166 * Look up ACPI objects associated with @host and initialize
167 * acpi_handle fields of @host, its ports and devices accordingly.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700168 *
Tejun Heofafbae82007-05-15 03:28:16 +0900169 * LOCKING:
170 * EH context.
171 *
172 * RETURNS:
173 * 0 on success, -errno on failure.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700174 */
Tejun Heofafbae82007-05-15 03:28:16 +0900175void ata_acpi_associate(struct ata_host *host)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700176{
Matthew Garrett237d8442007-10-03 01:24:16 +0100177 int i, j;
Alan Coxca426632007-03-08 23:13:50 +0000178
Tejun Heofafbae82007-05-15 03:28:16 +0900179 if (!is_pci_dev(host->dev) || libata_noacpi)
180 return;
Alan Coxca426632007-03-08 23:13:50 +0000181
Tejun Heofafbae82007-05-15 03:28:16 +0900182 host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev);
183 if (!host->acpi_handle)
184 return;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700185
Tejun Heofafbae82007-05-15 03:28:16 +0900186 for (i = 0; i < host->n_ports; i++) {
187 struct ata_port *ap = host->ports[i];
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700188
Tejun Heofafbae82007-05-15 03:28:16 +0900189 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);
Matthew Garrett237d8442007-10-03 01:24:16 +0100193
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 }
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700209 }
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700210}
211
212/**
Tejun Heo562f0c22007-12-15 15:05:01 +0900213 * 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 */
222void ata_acpi_dissociate(struct ata_host *host)
223{
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900224 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 }
Tejun Heo562f0c22007-12-15 15:05:01 +0900236}
237
238/**
Tejun Heo64578a32007-05-15 03:28:16 +0900239 * 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 */
Tejun Heo0d02f0b2007-12-15 15:04:57 +0900251int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm)
Tejun Heo64578a32007-05-15 03:28:16 +0900252{
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
Alan Coxbadff032007-10-04 21:28:18 +0100295EXPORT_SYMBOL_GPL(ata_acpi_gtm);
296
Tejun Heo64578a32007-05-15 03:28:16 +0900297/**
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 */
Tejun Heo0d02f0b2007-12-15 15:04:57 +0900310int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm)
Tejun Heo64578a32007-05-15 03:28:16 +0900311{
312 acpi_status status;
Tejun Heo0d02f0b2007-12-15 15:04:57 +0900313 struct ata_acpi_gtm stm_buf = *stm;
Tejun Heo64578a32007-05-15 03:28:16 +0900314 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);
Tejun Heo0d02f0b2007-12-15 15:04:57 +0900319 in_params[0].buffer.pointer = (u8 *)&stm_buf;
Tejun Heo64578a32007-05-15 03:28:16 +0900320 /* Buffers for id may need byteswapping ? */
321 in_params[1].type = ACPI_TYPE_BUFFER;
322 in_params[1].buffer.length = 512;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900323 in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id;
Tejun Heo64578a32007-05-15 03:28:16 +0900324 in_params[2].type = ACPI_TYPE_BUFFER;
325 in_params[2].buffer.length = 512;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900326 in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id;
Tejun Heo64578a32007-05-15 03:28:16 +0900327
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
Alan Coxbadff032007-10-04 21:28:18 +0100343EXPORT_SYMBOL_GPL(ata_acpi_stm);
344
Tejun Heo64578a32007-05-15 03:28:16 +0900345/**
Tejun Heo4700c4b2007-05-15 03:28:16 +0900346 * ata_dev_get_GTF - get the drive bootup default taskfile settings
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900347 * @dev: target ATA device
Tejun Heo4700c4b2007-05-15 03:28:16 +0900348 * @gtf: output parameter for buffer containing _GTF taskfile arrays
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700349 *
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 *
Tejun Heo4700c4b2007-05-15 03:28:16 +0900358 * LOCKING:
359 * EH context.
360 *
361 * RETURNS:
Tejun Heo66fa7f22007-12-15 15:05:04 +0900362 * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL
363 * if _GTF is invalid.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700364 */
Tejun Heo398e0782007-12-15 15:05:03 +0900365static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700366{
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900367 struct ata_port *ap = dev->link->ap;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900368 acpi_status status;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900369 struct acpi_buffer output;
370 union acpi_object *out_obj;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900371 int rc = 0;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700372
Tejun Heo398e0782007-12-15 15:05:03 +0900373 /* if _GTF is cached, use the cached value */
374 if (dev->gtf_cache) {
375 out_obj = dev->gtf_cache;
376 goto done;
377 }
378
Tejun Heo4700c4b2007-05-15 03:28:16 +0900379 /* set up output buffer */
380 output.length = ACPI_ALLOCATE_BUFFER;
381 output.pointer = NULL; /* ACPI-CA sets this; save/free it later */
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700382
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700383 if (ata_msg_probe(ap))
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900384 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n",
Tejun Heo878d4fe2007-02-21 16:36:33 +0900385 __FUNCTION__, ap->port_no);
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700386
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700387 /* _GTF has no input parameters */
Tejun Heo4700c4b2007-05-15 03:28:16 +0900388 status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output);
Tejun Heo398e0782007-12-15 15:05:03 +0900389 out_obj = dev->gtf_cache = output.pointer;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900390
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700391 if (ACPI_FAILURE(status)) {
Tejun Heo4700c4b2007-05-15 03:28:16 +0900392 if (status != AE_NOT_FOUND) {
393 ata_dev_printk(dev, KERN_WARNING,
394 "_GTF evaluation failed (AE 0x%x)\n",
395 status);
Tejun Heo66fa7f22007-12-15 15:05:04 +0900396 rc = -EINVAL;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900397 }
398 goto out_free;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700399 }
400
401 if (!output.length || !output.pointer) {
402 if (ata_msg_probe(ap))
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900403 ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: "
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700404 "length or ptr is NULL (0x%llx, 0x%p)\n",
405 __FUNCTION__,
406 (unsigned long long)output.length,
407 output.pointer);
Tejun Heo66fa7f22007-12-15 15:05:04 +0900408 rc = -EINVAL;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900409 goto out_free;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700410 }
411
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700412 if (out_obj->type != ACPI_TYPE_BUFFER) {
Tejun Heo69b16a52007-05-15 03:28:16 +0900413 ata_dev_printk(dev, KERN_WARNING,
414 "_GTF unexpected object type 0x%x\n",
415 out_obj->type);
Tejun Heo66fa7f22007-12-15 15:05:04 +0900416 rc = -EINVAL;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900417 goto out_free;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700418 }
419
Tejun Heo4700c4b2007-05-15 03:28:16 +0900420 if (out_obj->buffer.length % REGS_PER_GTF) {
Tejun Heo69b16a52007-05-15 03:28:16 +0900421 ata_dev_printk(dev, KERN_WARNING,
422 "unexpected _GTF length (%d)\n",
423 out_obj->buffer.length);
Tejun Heo66fa7f22007-12-15 15:05:04 +0900424 rc = -EINVAL;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900425 goto out_free;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700426 }
427
Tejun Heo398e0782007-12-15 15:05:03 +0900428 done:
Tejun Heo4700c4b2007-05-15 03:28:16 +0900429 rc = out_obj->buffer.length / REGS_PER_GTF;
Tejun Heo398e0782007-12-15 15:05:03 +0900430 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 }
Tejun Heo4700c4b2007-05-15 03:28:16 +0900437 return rc;
438
439 out_free:
Tejun Heo398e0782007-12-15 15:05:03 +0900440 ata_acpi_clear_gtf(dev);
Tejun Heo4700c4b2007-05-15 03:28:16 +0900441 return rc;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700442}
443
Tejun Heo7c77fa42007-12-18 16:33:03 +0900444/**
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 */
457unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
458 const struct ata_acpi_gtm *gtm)
459{
Tejun Heoa0f79b92007-12-18 16:33:05 +0900460 unsigned long xfer_mask = 0;
461 unsigned int type;
462 int unit;
463 u8 mode;
Tejun Heo7c77fa42007-12-18 16:33:03 +0900464
465 /* we always use the 0 slot for crap hardware */
466 unit = dev->devno;
467 if (!(gtm->flags & 0x10))
468 unit = 0;
469
Tejun Heoa0f79b92007-12-18 16:33:05 +0900470 /* PIO */
471 mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio);
472 xfer_mask |= ata_xfer_mode2mask(mode);
Tejun Heo7c77fa42007-12-18 16:33:03 +0900473
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 */
Tejun Heoa0f79b92007-12-18 16:33:05 +0900478 if (!(gtm->flags & (1 << (2 * unit))))
479 type = ATA_SHIFT_MWDMA;
480 else
481 type = ATA_SHIFT_UDMA;
Tejun Heo7c77fa42007-12-18 16:33:03 +0900482
Tejun Heoa0f79b92007-12-18 16:33:05 +0900483 mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma);
484 xfer_mask |= ata_xfer_mode2mask(mode);
485
486 return xfer_mask;
Tejun Heo7c77fa42007-12-18 16:33:03 +0900487}
488EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask);
489
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700490/**
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400491 * ata_acpi_cbl_80wire - Check for 80 wire cable
492 * @ap: Port to check
Tejun Heo021ee9a2007-12-18 16:33:06 +0900493 * @gtm: GTM data to use
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400494 *
Tejun Heo021ee9a2007-12-18 16:33:06 +0900495 * Return 1 if the @gtm indicates the BIOS selected an 80wire mode.
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400496 */
Tejun Heo021ee9a2007-12-18 16:33:06 +0900497int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm)
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400498{
Tejun Heo021ee9a2007-12-18 16:33:06 +0900499 struct ata_device *dev;
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400500
Tejun Heo021ee9a2007-12-18 16:33:06 +0900501 ata_link_for_each_dev(dev, &ap->link) {
502 unsigned long xfer_mask, udma_mask;
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400503
Tejun Heo021ee9a2007-12-18 16:33:06 +0900504 if (!ata_dev_enabled(dev))
505 continue;
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400506
Tejun Heo021ee9a2007-12-18 16:33:06 +0900507 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
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400514 return 0;
515}
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400516EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire);
517
Tejun Heo3264a8d2007-12-15 15:05:06 +0900518static 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
535static 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
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400572/**
Tejun Heo0e8634b2007-12-15 15:05:05 +0900573 * ata_acpi_run_tf - send taskfile registers to host controller
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900574 * @dev: target ATA device
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700575 * @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 *
Tejun Heo4700c4b2007-05-15 03:28:16 +0900588 * LOCKING:
589 * EH context.
590 *
591 * RETURNS:
Tejun Heo3264a8d2007-12-15 15:05:06 +0900592 * 1 if command is executed successfully. 0 if ignored, rejected or
593 * filtered out, -errno on other errors.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700594 */
Tejun Heo0e8634b2007-12-15 15:05:05 +0900595static int ata_acpi_run_tf(struct ata_device *dev,
Tejun Heo3264a8d2007-12-15 15:05:06 +0900596 const struct ata_acpi_gtf *gtf,
597 const struct ata_acpi_gtf *prev_gtf)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700598{
Tejun Heo3264a8d2007-12-15 15:05:06 +0900599 struct ata_taskfile *pptf = NULL;
600 struct ata_taskfile tf, ptf, rtf;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900601 unsigned int err_mask;
Tejun Heo0e8634b2007-12-15 15:05:05 +0900602 const char *level;
603 char msg[60];
604 int rc;
Jeff Garzikfc16c252007-02-24 21:05:01 -0500605
Tejun Heo4700c4b2007-05-15 03:28:16 +0900606 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;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700610
Tejun Heo3264a8d2007-12-15 15:05:06 +0900611 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 }
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700616
Tejun Heo3264a8d2007-12-15 15:05:06 +0900617 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);
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700621
Tejun Heo3264a8d2007-12-15 15:05:06 +0900622 switch (err_mask) {
623 case 0:
624 level = KERN_DEBUG;
625 snprintf(msg, sizeof(msg), "succeeded");
626 rc = 1;
627 break;
Tejun Heo0e8634b2007-12-15 15:05:05 +0900628
Tejun Heo3264a8d2007-12-15 15:05:06 +0900629 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;
Tejun Heo0e8634b2007-12-15 15:05:05 +0900636
Tejun Heo3264a8d2007-12-15 15:05:06 +0900637 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 {
Tejun Heo0e8634b2007-12-15 15:05:05 +0900646 level = KERN_INFO;
Tejun Heo3264a8d2007-12-15 15:05:06 +0900647 snprintf(msg, sizeof(msg), "filtered out");
Tejun Heo0e8634b2007-12-15 15:05:05 +0900648 rc = 0;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900649 }
650
Tejun Heo0e8634b2007-12-15 15:05:05 +0900651 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;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700657}
658
659/**
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700660 * ata_acpi_exec_tfs - get then write drive taskfile settings
Tejun Heo67465442007-05-15 03:28:16 +0900661 * @dev: target ATA device
Tejun Heo66fa7f22007-12-15 15:05:04 +0900662 * @nr_executed: out paramter for the number of executed commands
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700663 *
Tejun Heo67465442007-05-15 03:28:16 +0900664 * Evaluate _GTF and excute returned taskfiles.
Tejun Heo69b16a52007-05-15 03:28:16 +0900665 *
666 * LOCKING:
667 * EH context.
668 *
669 * RETURNS:
Tejun Heo66fa7f22007-12-15 15:05:04 +0900670 * Number of executed taskfiles on success, 0 if _GTF doesn't exist.
671 * -errno on other errors.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700672 */
Tejun Heo66fa7f22007-12-15 15:05:04 +0900673static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700674{
Tejun Heo3264a8d2007-12-15 15:05:06 +0900675 struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL;
Tejun Heo67465442007-05-15 03:28:16 +0900676 int gtf_count, i, rc;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700677
Tejun Heo67465442007-05-15 03:28:16 +0900678 /* get taskfiles */
Tejun Heo66fa7f22007-12-15 15:05:04 +0900679 rc = ata_dev_get_GTF(dev, &gtf);
680 if (rc < 0)
681 return rc;
682 gtf_count = rc;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700683
Tejun Heo67465442007-05-15 03:28:16 +0900684 /* execute them */
Tejun Heo3264a8d2007-12-15 15:05:06 +0900685 for (i = 0; i < gtf_count; i++, gtf++) {
686 rc = ata_acpi_run_tf(dev, gtf, pgtf);
Tejun Heo0e8634b2007-12-15 15:05:05 +0900687 if (rc < 0)
688 break;
Tejun Heo3264a8d2007-12-15 15:05:06 +0900689 if (rc) {
Tejun Heo0e8634b2007-12-15 15:05:05 +0900690 (*nr_executed)++;
Tejun Heo3264a8d2007-12-15 15:05:06 +0900691 pgtf = gtf;
692 }
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700693 }
694
Tejun Heo398e0782007-12-15 15:05:03 +0900695 ata_acpi_clear_gtf(dev);
Tejun Heo67465442007-05-15 03:28:16 +0900696
Tejun Heo0e8634b2007-12-15 15:05:05 +0900697 if (rc < 0)
698 return rc;
699 return 0;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700700}
701
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700702/**
703 * ata_acpi_push_id - send Identify data to drive
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900704 * @dev: target ATA device
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700705 *
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.
Tejun Heo69b16a52007-05-15 03:28:16 +0900711 *
712 * LOCKING:
713 * EH context.
714 *
715 * RETURNS:
716 * 0 on success, -errno on failure.
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700717 */
Tejun Heo67465442007-05-15 03:28:16 +0900718static int ata_acpi_push_id(struct ata_device *dev)
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700719{
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900720 struct ata_port *ap = dev->link->ap;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900721 int err;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900722 acpi_status status;
723 struct acpi_object_list input;
724 union acpi_object in_params[1];
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700725
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700726 if (ata_msg_probe(ap))
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900727 ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n",
728 __FUNCTION__, dev->devno, ap->port_no);
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700729
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700730 /* 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;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900735 in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS;
736 in_params[0].buffer.pointer = (u8 *)dev->id;
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700737 /* Output buffer: _SDD has no output */
738
739 /* It's OK for _SDD to be missing too. */
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900740 swap_buf_le16(dev->id, ATA_ID_WORDS);
Tejun Heofafbae82007-05-15 03:28:16 +0900741 status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL);
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900742 swap_buf_le16(dev->id, ATA_ID_WORDS);
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700743
744 err = ACPI_FAILURE(status) ? -EIO : 0;
Tejun Heo69b16a52007-05-15 03:28:16 +0900745 if (err < 0)
746 ata_dev_printk(dev, KERN_WARNING,
747 "ACPI _SDD failed (AE 0x%x)\n", status);
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700748
Tejun Heo67465442007-05-15 03:28:16 +0900749 return err;
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700750}
751
Tejun Heo67465442007-05-15 03:28:16 +0900752/**
Tejun Heo64578a32007-05-15 03:28:16 +0900753 * 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 */
767int ata_acpi_on_suspend(struct ata_port *ap)
768{
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900769 /* nada */
770 return 0;
Tejun Heo64578a32007-05-15 03:28:16 +0900771}
772
773/**
Tejun Heo67465442007-05-15 03:28:16 +0900774 * 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 */
783void ata_acpi_on_resume(struct ata_port *ap)
784{
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900785 const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
Tejun Heof58229f2007-08-06 18:36:23 +0900786 struct ata_device *dev;
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700787
Tejun Heo398e0782007-12-15 15:05:03 +0900788 if (ap->acpi_handle && gtm) {
789 /* _GTM valid */
790
791 /* restore timing parameters */
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900792 ata_acpi_stm(ap, gtm);
Tejun Heo64578a32007-05-15 03:28:16 +0900793
Tejun Heo398e0782007-12-15 15:05:03 +0900794 /* _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 }
Tejun Heo67465442007-05-15 03:28:16 +0900813}
814
815/**
Shaohua Libd3adca2007-11-02 09:32:38 +0800816 * 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 */
823void 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
845/**
Tejun Heo67465442007-05-15 03:28:16 +0900846 * 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 */
859int ata_acpi_on_devcfg(struct ata_device *dev)
860{
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900861 struct ata_port *ap = dev->link->ap;
862 struct ata_eh_context *ehc = &ap->link.eh_context;
Tejun Heo67465442007-05-15 03:28:16 +0900863 int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA;
Tejun Heo66fa7f22007-12-15 15:05:04 +0900864 int nr_executed = 0;
Tejun Heo67465442007-05-15 03:28:16 +0900865 int rc;
866
Tejun Heo67465442007-05-15 03:28:16 +0900867 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 */
Tejun Heo66fa7f22007-12-15 15:05:04 +0900883 rc = ata_acpi_exec_tfs(dev, &nr_executed);
884 if (rc)
Tejun Heo67465442007-05-15 03:28:16 +0900885 goto acpi_err;
886
887 dev->flags &= ~ATA_DFLAG_ACPI_PENDING;
888
889 /* refresh IDENTIFY page if any _GTF command has been executed */
Tejun Heo66fa7f22007-12-15 15:05:04 +0900890 if (nr_executed) {
Tejun Heo67465442007-05-15 03:28:16 +0900891 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:
Tejun Heo66fa7f22007-12-15 15:05:04 +0900902 /* ignore evaluation failure if we can continue safely */
903 if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
904 return 0;
Tejun Heo67465442007-05-15 03:28:16 +0900905
Tejun Heo66fa7f22007-12-15 15:05:04 +0900906 /* 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;
Tejun Heo67465442007-05-15 03:28:16 +0900910 }
Tejun Heo66fa7f22007-12-15 15:05:04 +0900911
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
Tejun Heo67465442007-05-15 03:28:16 +0900922 return rc;
923}
Tejun Heo562f0c22007-12-15 15:05:01 +0900924
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 */
934void ata_acpi_on_disable(struct ata_device *dev)
935{
Tejun Heo398e0782007-12-15 15:05:03 +0900936 ata_acpi_clear_gtf(dev);
Tejun Heo562f0c22007-12-15 15:05:01 +0900937}