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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>
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070022
Tejun Heo110f66d2009-09-16 04:17:28 +090023unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT;
Tejun Heo3264a8d2007-12-15 15:05:06 +090024module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644);
Tejun Heofa5b5612009-09-16 04:17:02 +090025MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock, 0x4=DIPM, 0x8=FPDMA non-zero offset, 0x10=FPDMA DMA Setup FIS auto-activate)");
Tejun Heo3264a8d2007-12-15 15:05:06 +090026
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070027#define NO_PORT_MULT 0xffff
Jeff Garzik2dcb4072007-10-19 06:42:56 -040028#define SATA_ADR(root, pmp) (((root) << 16) | (pmp))
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070029
30#define REGS_PER_GTF 7
Tejun Heo4700c4b2007-05-15 03:28:16 +090031struct ata_acpi_gtf {
32 u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */
33} __packed;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070034
Alan Coxca426632007-03-08 23:13:50 +000035/*
36 * Helper - belongs in the PCI layer somewhere eventually
37 */
38static int is_pci_dev(struct device *dev)
39{
40 return (dev->bus == &pci_bus_type);
41}
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070042
Tejun Heo398e0782007-12-15 15:05:03 +090043static void ata_acpi_clear_gtf(struct ata_device *dev)
44{
45 kfree(dev->gtf_cache);
46 dev->gtf_cache = NULL;
47}
48
Tejun Heod0df8b5d2007-09-23 13:19:54 +090049/**
50 * ata_acpi_associate_sata_port - associate SATA port with ACPI objects
51 * @ap: target SATA port
52 *
53 * Look up ACPI objects associated with @ap and initialize acpi_handle
54 * fields of @ap, the port and devices accordingly.
55 *
56 * LOCKING:
57 * EH context.
58 *
59 * RETURNS:
60 * 0 on success, -errno on failure.
61 */
62void ata_acpi_associate_sata_port(struct ata_port *ap)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070063{
Tejun Heod0df8b5d2007-09-23 13:19:54 +090064 WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA));
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070065
Tejun Heo071f44b2008-04-07 22:47:22 +090066 if (!sata_pmp_attached(ap)) {
Tejun Heod0df8b5d2007-09-23 13:19:54 +090067 acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
68
69 ap->link.device->acpi_handle =
70 acpi_get_child(ap->host->acpi_handle, adr);
71 } else {
72 struct ata_link *link;
73
74 ap->link.device->acpi_handle = NULL;
75
Tejun Heo1eca4362008-11-03 20:03:17 +090076 ata_for_each_link(link, ap, EDGE) {
Tejun Heod0df8b5d2007-09-23 13:19:54 +090077 acpi_integer adr = SATA_ADR(ap->port_no, link->pmp);
78
79 link->device->acpi_handle =
80 acpi_get_child(ap->host->acpi_handle, adr);
81 }
82 }
Tejun Heofafbae82007-05-15 03:28:16 +090083}
Alan Coxca426632007-03-08 23:13:50 +000084
Tejun Heofafbae82007-05-15 03:28:16 +090085static void ata_acpi_associate_ide_port(struct ata_port *ap)
86{
87 int max_devices, i;
88
89 ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no);
90 if (!ap->acpi_handle)
91 return;
92
93 max_devices = 1;
94 if (ap->flags & ATA_FLAG_SLAVE_POSS)
95 max_devices++;
96
97 for (i = 0; i < max_devices; i++) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +090098 struct ata_device *dev = &ap->link.device[i];
Tejun Heofafbae82007-05-15 03:28:16 +090099
100 dev->acpi_handle = acpi_get_child(ap->acpi_handle, i);
101 }
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900102
103 if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0)
104 ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700105}
106
Holger Macht664d0802008-06-03 20:27:59 +0200107/* @ap and @dev are the same as ata_acpi_handle_hotplug() */
108static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev)
109{
110 if (dev)
111 dev->flags |= ATA_DFLAG_DETACH;
112 else {
113 struct ata_link *tlink;
114 struct ata_device *tdev;
115
Tejun Heo1eca4362008-11-03 20:03:17 +0900116 ata_for_each_link(tlink, ap, EDGE)
117 ata_for_each_dev(tdev, tlink, ALL)
Holger Macht664d0802008-06-03 20:27:59 +0200118 tdev->flags |= ATA_DFLAG_DETACH;
119 }
120
121 ata_port_schedule_eh(ap);
122}
123
124/**
125 * ata_acpi_handle_hotplug - ACPI event handler backend
126 * @ap: ATA port ACPI event occurred
127 * @dev: ATA device ACPI event occurred (can be NULL)
128 * @event: ACPI event which occurred
Holger Macht664d0802008-06-03 20:27:59 +0200129 *
130 * All ACPI bay / device realted events end up in this function. If
131 * the event is port-wide @dev is NULL. If the event is specific to a
132 * device, @dev points to it.
133 *
134 * Hotplug (as opposed to unplug) notification is always handled as
135 * port-wide while unplug only kills the target device on device-wide
136 * event.
137 *
138 * LOCKING:
139 * ACPI notify handler context. May sleep.
140 */
141static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
Shaohua Lif730ae12008-08-28 10:05:45 +0800142 u32 event)
Matthew Garrett237d8442007-10-03 01:24:16 +0100143{
Holger Macht664d0802008-06-03 20:27:59 +0200144 struct ata_eh_info *ehi = &ap->link.eh_info;
Tejun Heo233f1122008-03-12 14:24:43 +0900145 int wait = 0;
146 unsigned long flags;
Shaohua Lif730ae12008-08-28 10:05:45 +0800147 acpi_handle handle;
Jeff Garzikc85665f2008-05-19 17:56:10 -0400148
Shaohua Lif730ae12008-08-28 10:05:45 +0800149 if (dev)
Matthew Garrettae6c23c2008-05-19 17:29:34 +0100150 handle = dev->acpi_handle;
Shaohua Lif730ae12008-08-28 10:05:45 +0800151 else
Matthew Garrettae6c23c2008-05-19 17:29:34 +0100152 handle = ap->acpi_handle;
Zhang Rui3c1e3892008-07-11 09:42:03 -0400153
Holger Macht664d0802008-06-03 20:27:59 +0200154 spin_lock_irqsave(ap->lock, flags);
Shaohua Lif730ae12008-08-28 10:05:45 +0800155 /*
156 * When dock driver calls into the routine, it will always use
157 * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and
158 * ACPI_NOTIFY_EJECT_REQUEST for remove
159 */
Tejun Heo233f1122008-03-12 14:24:43 +0900160 switch (event) {
161 case ACPI_NOTIFY_BUS_CHECK:
162 case ACPI_NOTIFY_DEVICE_CHECK:
163 ata_ehi_push_desc(ehi, "ACPI event");
Jeff Garzikc85665f2008-05-19 17:56:10 -0400164
Shaohua Lif730ae12008-08-28 10:05:45 +0800165 ata_ehi_hotplugged(ehi);
166 ata_port_freeze(ap);
Holger Macht664d0802008-06-03 20:27:59 +0200167 break;
168 case ACPI_NOTIFY_EJECT_REQUEST:
169 ata_ehi_push_desc(ehi, "ACPI event");
170
Holger Macht664d0802008-06-03 20:27:59 +0200171 ata_acpi_detach_device(ap, dev);
172 wait = 1;
173 break;
Matthew Garrett237d8442007-10-03 01:24:16 +0100174 }
175
Matthew Garrettae6c23c2008-05-19 17:29:34 +0100176 spin_unlock_irqrestore(ap->lock, flags);
177
Shaohua Lif730ae12008-08-28 10:05:45 +0800178 if (wait)
Matthew Garrettae6c23c2008-05-19 17:29:34 +0100179 ata_port_wait_eh(ap);
Holger Macht664d0802008-06-03 20:27:59 +0200180}
181
182static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data)
183{
184 struct ata_device *dev = data;
185
Shaohua Lif730ae12008-08-28 10:05:45 +0800186 ata_acpi_handle_hotplug(dev->link->ap, dev, event);
Holger Macht664d0802008-06-03 20:27:59 +0200187}
188
189static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data)
190{
191 struct ata_port *ap = data;
192
Shaohua Lif730ae12008-08-28 10:05:45 +0800193 ata_acpi_handle_hotplug(ap, NULL, event);
Matthew Garrett237d8442007-10-03 01:24:16 +0100194}
195
Shaohua Li1253f7a2008-08-28 10:06:16 +0800196static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev,
197 u32 event)
198{
199 struct kobject *kobj = NULL;
200 char event_string[20];
201 char *envp[] = { event_string, NULL };
202
203 if (dev) {
204 if (dev->sdev)
205 kobj = &dev->sdev->sdev_gendev.kobj;
206 } else
207 kobj = &ap->dev->kobj;
208
209 if (kobj) {
210 snprintf(event_string, 20, "BAY_EVENT=%d", event);
211 kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
212 }
213}
214
215static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data)
216{
217 ata_acpi_uevent(data, NULL, event);
218}
219
220static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data)
221{
222 struct ata_device *dev = data;
223 ata_acpi_uevent(dev->link->ap, dev, event);
224}
225
226static struct acpi_dock_ops ata_acpi_dev_dock_ops = {
227 .handler = ata_acpi_dev_notify_dock,
228 .uevent = ata_acpi_dev_uevent,
229};
230
231static struct acpi_dock_ops ata_acpi_ap_dock_ops = {
232 .handler = ata_acpi_ap_notify_dock,
233 .uevent = ata_acpi_ap_uevent,
234};
235
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700236/**
Tejun Heofafbae82007-05-15 03:28:16 +0900237 * ata_acpi_associate - associate ATA host with ACPI objects
238 * @host: target ATA host
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700239 *
Tejun Heofafbae82007-05-15 03:28:16 +0900240 * Look up ACPI objects associated with @host and initialize
241 * acpi_handle fields of @host, its ports and devices accordingly.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700242 *
Tejun Heofafbae82007-05-15 03:28:16 +0900243 * LOCKING:
244 * EH context.
245 *
246 * RETURNS:
247 * 0 on success, -errno on failure.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700248 */
Tejun Heofafbae82007-05-15 03:28:16 +0900249void ata_acpi_associate(struct ata_host *host)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700250{
Matthew Garrett237d8442007-10-03 01:24:16 +0100251 int i, j;
Alan Coxca426632007-03-08 23:13:50 +0000252
Tejun Heofafbae82007-05-15 03:28:16 +0900253 if (!is_pci_dev(host->dev) || libata_noacpi)
254 return;
Alan Coxca426632007-03-08 23:13:50 +0000255
Tejun Heofafbae82007-05-15 03:28:16 +0900256 host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev);
257 if (!host->acpi_handle)
258 return;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700259
Tejun Heofafbae82007-05-15 03:28:16 +0900260 for (i = 0; i < host->n_ports; i++) {
261 struct ata_port *ap = host->ports[i];
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700262
Tejun Heofafbae82007-05-15 03:28:16 +0900263 if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA)
264 ata_acpi_associate_sata_port(ap);
265 else
266 ata_acpi_associate_ide_port(ap);
Matthew Garrett237d8442007-10-03 01:24:16 +0100267
Tejun Heo233f1122008-03-12 14:24:43 +0900268 if (ap->acpi_handle) {
Tejun Heo233f1122008-03-12 14:24:43 +0900269 /* we might be on a docking station */
270 register_hotplug_dock_device(ap->acpi_handle,
Shaohua Li1253f7a2008-08-28 10:06:16 +0800271 &ata_acpi_ap_dock_ops, ap);
Tejun Heo233f1122008-03-12 14:24:43 +0900272 }
Matthew Garrett237d8442007-10-03 01:24:16 +0100273
274 for (j = 0; j < ata_link_max_devices(&ap->link); j++) {
275 struct ata_device *dev = &ap->link.device[j];
276
Tejun Heo233f1122008-03-12 14:24:43 +0900277 if (dev->acpi_handle) {
Tejun Heo233f1122008-03-12 14:24:43 +0900278 /* we might be on a docking station */
279 register_hotplug_dock_device(dev->acpi_handle,
Shaohua Li1253f7a2008-08-28 10:06:16 +0800280 &ata_acpi_dev_dock_ops, dev);
Tejun Heo233f1122008-03-12 14:24:43 +0900281 }
Matthew Garrett237d8442007-10-03 01:24:16 +0100282 }
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700283 }
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700284}
285
286/**
Tejun Heo562f0c22007-12-15 15:05:01 +0900287 * ata_acpi_dissociate - dissociate ATA host from ACPI objects
288 * @host: target ATA host
289 *
290 * This function is called during driver detach after the whole host
291 * is shut down.
292 *
293 * LOCKING:
294 * EH context.
295 */
296void ata_acpi_dissociate(struct ata_host *host)
297{
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900298 int i;
299
300 /* Restore initial _GTM values so that driver which attaches
301 * afterward can use them too.
302 */
303 for (i = 0; i < host->n_ports; i++) {
304 struct ata_port *ap = host->ports[i];
305 const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
306
307 if (ap->acpi_handle && gtm)
308 ata_acpi_stm(ap, gtm);
309 }
Tejun Heo562f0c22007-12-15 15:05:01 +0900310}
311
312/**
Tejun Heo64578a32007-05-15 03:28:16 +0900313 * ata_acpi_gtm - execute _GTM
314 * @ap: target ATA port
315 * @gtm: out parameter for _GTM result
316 *
317 * Evaluate _GTM and store the result in @gtm.
318 *
319 * LOCKING:
320 * EH context.
321 *
322 * RETURNS:
323 * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure.
324 */
Tejun Heo0d02f0b2007-12-15 15:04:57 +0900325int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm)
Tejun Heo64578a32007-05-15 03:28:16 +0900326{
327 struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER };
328 union acpi_object *out_obj;
329 acpi_status status;
330 int rc = 0;
331
332 status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output);
333
334 rc = -ENOENT;
335 if (status == AE_NOT_FOUND)
336 goto out_free;
337
338 rc = -EINVAL;
339 if (ACPI_FAILURE(status)) {
340 ata_port_printk(ap, KERN_ERR,
341 "ACPI get timing mode failed (AE 0x%x)\n",
342 status);
343 goto out_free;
344 }
345
346 out_obj = output.pointer;
347 if (out_obj->type != ACPI_TYPE_BUFFER) {
348 ata_port_printk(ap, KERN_WARNING,
349 "_GTM returned unexpected object type 0x%x\n",
350 out_obj->type);
351
352 goto out_free;
353 }
354
355 if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) {
356 ata_port_printk(ap, KERN_ERR,
357 "_GTM returned invalid length %d\n",
358 out_obj->buffer.length);
359 goto out_free;
360 }
361
362 memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm));
363 rc = 0;
364 out_free:
365 kfree(output.pointer);
366 return rc;
367}
368
Alan Coxbadff032007-10-04 21:28:18 +0100369EXPORT_SYMBOL_GPL(ata_acpi_gtm);
370
Tejun Heo64578a32007-05-15 03:28:16 +0900371/**
372 * ata_acpi_stm - execute _STM
373 * @ap: target ATA port
374 * @stm: timing parameter to _STM
375 *
376 * Evaluate _STM with timing parameter @stm.
377 *
378 * LOCKING:
379 * EH context.
380 *
381 * RETURNS:
382 * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure.
383 */
Tejun Heo0d02f0b2007-12-15 15:04:57 +0900384int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm)
Tejun Heo64578a32007-05-15 03:28:16 +0900385{
386 acpi_status status;
Tejun Heo0d02f0b2007-12-15 15:04:57 +0900387 struct ata_acpi_gtm stm_buf = *stm;
Tejun Heo64578a32007-05-15 03:28:16 +0900388 struct acpi_object_list input;
389 union acpi_object in_params[3];
390
391 in_params[0].type = ACPI_TYPE_BUFFER;
392 in_params[0].buffer.length = sizeof(struct ata_acpi_gtm);
Tejun Heo0d02f0b2007-12-15 15:04:57 +0900393 in_params[0].buffer.pointer = (u8 *)&stm_buf;
Tejun Heo64578a32007-05-15 03:28:16 +0900394 /* Buffers for id may need byteswapping ? */
395 in_params[1].type = ACPI_TYPE_BUFFER;
396 in_params[1].buffer.length = 512;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900397 in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id;
Tejun Heo64578a32007-05-15 03:28:16 +0900398 in_params[2].type = ACPI_TYPE_BUFFER;
399 in_params[2].buffer.length = 512;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900400 in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id;
Tejun Heo64578a32007-05-15 03:28:16 +0900401
402 input.count = 3;
403 input.pointer = in_params;
404
405 status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL);
406
407 if (status == AE_NOT_FOUND)
408 return -ENOENT;
409 if (ACPI_FAILURE(status)) {
410 ata_port_printk(ap, KERN_ERR,
411 "ACPI set timing mode failed (status=0x%x)\n", status);
412 return -EINVAL;
413 }
414 return 0;
415}
416
Alan Coxbadff032007-10-04 21:28:18 +0100417EXPORT_SYMBOL_GPL(ata_acpi_stm);
418
Tejun Heo64578a32007-05-15 03:28:16 +0900419/**
Tejun Heo4700c4b2007-05-15 03:28:16 +0900420 * ata_dev_get_GTF - get the drive bootup default taskfile settings
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900421 * @dev: target ATA device
Tejun Heo4700c4b2007-05-15 03:28:16 +0900422 * @gtf: output parameter for buffer containing _GTF taskfile arrays
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700423 *
424 * This applies to both PATA and SATA drives.
425 *
426 * The _GTF method has no input parameters.
427 * It returns a variable number of register set values (registers
428 * hex 1F1..1F7, taskfiles).
429 * The <variable number> is not known in advance, so have ACPI-CA
430 * allocate the buffer as needed and return it, then free it later.
431 *
Tejun Heo4700c4b2007-05-15 03:28:16 +0900432 * LOCKING:
433 * EH context.
434 *
435 * RETURNS:
Tejun Heo66fa7f22007-12-15 15:05:04 +0900436 * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL
437 * if _GTF is invalid.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700438 */
Tejun Heo398e0782007-12-15 15:05:03 +0900439static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700440{
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900441 struct ata_port *ap = dev->link->ap;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900442 acpi_status status;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900443 struct acpi_buffer output;
444 union acpi_object *out_obj;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900445 int rc = 0;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700446
Tejun Heo398e0782007-12-15 15:05:03 +0900447 /* if _GTF is cached, use the cached value */
448 if (dev->gtf_cache) {
449 out_obj = dev->gtf_cache;
450 goto done;
451 }
452
Tejun Heo4700c4b2007-05-15 03:28:16 +0900453 /* set up output buffer */
454 output.length = ACPI_ALLOCATE_BUFFER;
455 output.pointer = NULL; /* ACPI-CA sets this; save/free it later */
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700456
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700457 if (ata_msg_probe(ap))
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900458 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n",
Harvey Harrison7f5e4e82008-03-05 18:24:52 -0800459 __func__, ap->port_no);
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700460
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700461 /* _GTF has no input parameters */
Tejun Heo4700c4b2007-05-15 03:28:16 +0900462 status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output);
Tejun Heo398e0782007-12-15 15:05:03 +0900463 out_obj = dev->gtf_cache = output.pointer;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900464
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700465 if (ACPI_FAILURE(status)) {
Tejun Heo4700c4b2007-05-15 03:28:16 +0900466 if (status != AE_NOT_FOUND) {
467 ata_dev_printk(dev, KERN_WARNING,
468 "_GTF evaluation failed (AE 0x%x)\n",
469 status);
Tejun Heo66fa7f22007-12-15 15:05:04 +0900470 rc = -EINVAL;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900471 }
472 goto out_free;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700473 }
474
475 if (!output.length || !output.pointer) {
476 if (ata_msg_probe(ap))
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900477 ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: "
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700478 "length or ptr is NULL (0x%llx, 0x%p)\n",
Harvey Harrison7f5e4e82008-03-05 18:24:52 -0800479 __func__,
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700480 (unsigned long long)output.length,
481 output.pointer);
Tejun Heo66fa7f22007-12-15 15:05:04 +0900482 rc = -EINVAL;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900483 goto out_free;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700484 }
485
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700486 if (out_obj->type != ACPI_TYPE_BUFFER) {
Tejun Heo69b16a52007-05-15 03:28:16 +0900487 ata_dev_printk(dev, KERN_WARNING,
488 "_GTF unexpected object type 0x%x\n",
489 out_obj->type);
Tejun Heo66fa7f22007-12-15 15:05:04 +0900490 rc = -EINVAL;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900491 goto out_free;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700492 }
493
Tejun Heo4700c4b2007-05-15 03:28:16 +0900494 if (out_obj->buffer.length % REGS_PER_GTF) {
Tejun Heo69b16a52007-05-15 03:28:16 +0900495 ata_dev_printk(dev, KERN_WARNING,
496 "unexpected _GTF length (%d)\n",
497 out_obj->buffer.length);
Tejun Heo66fa7f22007-12-15 15:05:04 +0900498 rc = -EINVAL;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900499 goto out_free;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700500 }
501
Tejun Heo398e0782007-12-15 15:05:03 +0900502 done:
Tejun Heo4700c4b2007-05-15 03:28:16 +0900503 rc = out_obj->buffer.length / REGS_PER_GTF;
Tejun Heo398e0782007-12-15 15:05:03 +0900504 if (gtf) {
505 *gtf = (void *)out_obj->buffer.pointer;
506 if (ata_msg_probe(ap))
507 ata_dev_printk(dev, KERN_DEBUG,
508 "%s: returning gtf=%p, gtf_count=%d\n",
Harvey Harrison7f5e4e82008-03-05 18:24:52 -0800509 __func__, *gtf, rc);
Tejun Heo398e0782007-12-15 15:05:03 +0900510 }
Tejun Heo4700c4b2007-05-15 03:28:16 +0900511 return rc;
512
513 out_free:
Tejun Heo398e0782007-12-15 15:05:03 +0900514 ata_acpi_clear_gtf(dev);
Tejun Heo4700c4b2007-05-15 03:28:16 +0900515 return rc;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700516}
517
Tejun Heo7c77fa42007-12-18 16:33:03 +0900518/**
519 * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter
520 * @dev: target device
521 * @gtm: GTM parameter to use
522 *
523 * Determine xfermask for @dev from @gtm.
524 *
525 * LOCKING:
526 * None.
527 *
528 * RETURNS:
529 * Determined xfermask.
530 */
531unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
532 const struct ata_acpi_gtm *gtm)
533{
Tejun Heoa0f79b92007-12-18 16:33:05 +0900534 unsigned long xfer_mask = 0;
535 unsigned int type;
536 int unit;
537 u8 mode;
Tejun Heo7c77fa42007-12-18 16:33:03 +0900538
539 /* we always use the 0 slot for crap hardware */
540 unit = dev->devno;
541 if (!(gtm->flags & 0x10))
542 unit = 0;
543
Tejun Heoa0f79b92007-12-18 16:33:05 +0900544 /* PIO */
545 mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio);
546 xfer_mask |= ata_xfer_mode2mask(mode);
Tejun Heo7c77fa42007-12-18 16:33:03 +0900547
548 /* See if we have MWDMA or UDMA data. We don't bother with
549 * MWDMA if UDMA is available as this means the BIOS set UDMA
550 * and our error changedown if it works is UDMA to PIO anyway.
551 */
Tejun Heoa0f79b92007-12-18 16:33:05 +0900552 if (!(gtm->flags & (1 << (2 * unit))))
553 type = ATA_SHIFT_MWDMA;
554 else
555 type = ATA_SHIFT_UDMA;
Tejun Heo7c77fa42007-12-18 16:33:03 +0900556
Tejun Heoa0f79b92007-12-18 16:33:05 +0900557 mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma);
558 xfer_mask |= ata_xfer_mode2mask(mode);
559
560 return xfer_mask;
Tejun Heo7c77fa42007-12-18 16:33:03 +0900561}
562EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask);
563
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700564/**
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400565 * ata_acpi_cbl_80wire - Check for 80 wire cable
566 * @ap: Port to check
Tejun Heo021ee9a2007-12-18 16:33:06 +0900567 * @gtm: GTM data to use
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400568 *
Tejun Heo021ee9a2007-12-18 16:33:06 +0900569 * Return 1 if the @gtm indicates the BIOS selected an 80wire mode.
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400570 */
Tejun Heo021ee9a2007-12-18 16:33:06 +0900571int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm)
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400572{
Tejun Heo021ee9a2007-12-18 16:33:06 +0900573 struct ata_device *dev;
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400574
Tejun Heo1eca4362008-11-03 20:03:17 +0900575 ata_for_each_dev(dev, &ap->link, ENABLED) {
Tejun Heo021ee9a2007-12-18 16:33:06 +0900576 unsigned long xfer_mask, udma_mask;
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400577
Tejun Heo021ee9a2007-12-18 16:33:06 +0900578 xfer_mask = ata_acpi_gtm_xfermask(dev, gtm);
579 ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask);
580
581 if (udma_mask & ~ATA_UDMA_MASK_40C)
582 return 1;
583 }
584
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400585 return 0;
586}
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400587EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire);
588
Tejun Heo3264a8d2007-12-15 15:05:06 +0900589static void ata_acpi_gtf_to_tf(struct ata_device *dev,
590 const struct ata_acpi_gtf *gtf,
591 struct ata_taskfile *tf)
592{
593 ata_tf_init(dev, tf);
594
595 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
596 tf->protocol = ATA_PROT_NODATA;
597 tf->feature = gtf->tf[0]; /* 0x1f1 */
598 tf->nsect = gtf->tf[1]; /* 0x1f2 */
599 tf->lbal = gtf->tf[2]; /* 0x1f3 */
600 tf->lbam = gtf->tf[3]; /* 0x1f4 */
601 tf->lbah = gtf->tf[4]; /* 0x1f5 */
602 tf->device = gtf->tf[5]; /* 0x1f6 */
603 tf->command = gtf->tf[6]; /* 0x1f7 */
604}
605
Tejun Heo110f66d2009-09-16 04:17:28 +0900606static int ata_acpi_filter_tf(struct ata_device *dev,
607 const struct ata_taskfile *tf,
Tejun Heo3264a8d2007-12-15 15:05:06 +0900608 const struct ata_taskfile *ptf)
609{
Tejun Heo110f66d2009-09-16 04:17:28 +0900610 if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) {
Tejun Heo3264a8d2007-12-15 15:05:06 +0900611 /* libata doesn't use ACPI to configure transfer mode.
612 * It will only confuse device configuration. Skip.
613 */
614 if (tf->command == ATA_CMD_SET_FEATURES &&
615 tf->feature == SETFEATURES_XFER)
616 return 1;
617 }
618
Tejun Heo110f66d2009-09-16 04:17:28 +0900619 if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) {
Tejun Heo3264a8d2007-12-15 15:05:06 +0900620 /* BIOS writers, sorry but we don't wanna lock
621 * features unless the user explicitly said so.
622 */
623
624 /* DEVICE CONFIGURATION FREEZE LOCK */
625 if (tf->command == ATA_CMD_CONF_OVERLAY &&
626 tf->feature == ATA_DCO_FREEZE_LOCK)
627 return 1;
628
629 /* SECURITY FREEZE LOCK */
630 if (tf->command == ATA_CMD_SEC_FREEZE_LOCK)
631 return 1;
632
633 /* SET MAX LOCK and SET MAX FREEZE LOCK */
634 if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) &&
635 tf->command == ATA_CMD_SET_MAX &&
636 (tf->feature == ATA_SET_MAX_LOCK ||
637 tf->feature == ATA_SET_MAX_FREEZE_LOCK))
638 return 1;
639 }
640
Tejun Heofa5b5612009-09-16 04:17:02 +0900641 if (tf->command == ATA_CMD_SET_FEATURES &&
642 tf->feature == SETFEATURES_SATA_ENABLE) {
Tejun Heob3449912008-07-06 23:15:03 +0900643 /* inhibit enabling DIPM */
Tejun Heo110f66d2009-09-16 04:17:28 +0900644 if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM &&
Tejun Heob3449912008-07-06 23:15:03 +0900645 tf->nsect == SATA_DIPM)
646 return 1;
Tejun Heofa5b5612009-09-16 04:17:02 +0900647
648 /* inhibit FPDMA non-zero offset */
Tejun Heo110f66d2009-09-16 04:17:28 +0900649 if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET &&
Tejun Heofa5b5612009-09-16 04:17:02 +0900650 (tf->nsect == SATA_FPDMA_OFFSET ||
651 tf->nsect == SATA_FPDMA_IN_ORDER))
652 return 1;
653
654 /* inhibit FPDMA auto activation */
Tejun Heo110f66d2009-09-16 04:17:28 +0900655 if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA &&
Tejun Heofa5b5612009-09-16 04:17:02 +0900656 tf->nsect == SATA_FPDMA_AA)
657 return 1;
Tejun Heob3449912008-07-06 23:15:03 +0900658 }
659
Tejun Heo3264a8d2007-12-15 15:05:06 +0900660 return 0;
661}
662
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400663/**
Tejun Heo0e8634b2007-12-15 15:05:05 +0900664 * ata_acpi_run_tf - send taskfile registers to host controller
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900665 * @dev: target ATA device
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700666 * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7)
667 *
668 * Outputs ATA taskfile to standard ATA host controller using MMIO
669 * or PIO as indicated by the ATA_FLAG_MMIO flag.
670 * Writes the control, feature, nsect, lbal, lbam, and lbah registers.
671 * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
672 * hob_lbal, hob_lbam, and hob_lbah.
673 *
674 * This function waits for idle (!BUSY and !DRQ) after writing
675 * registers. If the control register has a new value, this
676 * function also waits for idle after writing control and before
677 * writing the remaining registers.
678 *
Tejun Heo4700c4b2007-05-15 03:28:16 +0900679 * LOCKING:
680 * EH context.
681 *
682 * RETURNS:
Tejun Heo3264a8d2007-12-15 15:05:06 +0900683 * 1 if command is executed successfully. 0 if ignored, rejected or
684 * filtered out, -errno on other errors.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700685 */
Tejun Heo0e8634b2007-12-15 15:05:05 +0900686static int ata_acpi_run_tf(struct ata_device *dev,
Tejun Heo3264a8d2007-12-15 15:05:06 +0900687 const struct ata_acpi_gtf *gtf,
688 const struct ata_acpi_gtf *prev_gtf)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700689{
Tejun Heo3264a8d2007-12-15 15:05:06 +0900690 struct ata_taskfile *pptf = NULL;
691 struct ata_taskfile tf, ptf, rtf;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900692 unsigned int err_mask;
Tejun Heo0e8634b2007-12-15 15:05:05 +0900693 const char *level;
Robert Hancock65211482009-07-14 20:43:39 -0600694 const char *descr;
Tejun Heo0e8634b2007-12-15 15:05:05 +0900695 char msg[60];
696 int rc;
Jeff Garzikfc16c252007-02-24 21:05:01 -0500697
Tejun Heo4700c4b2007-05-15 03:28:16 +0900698 if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0)
699 && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0)
700 && (gtf->tf[6] == 0))
701 return 0;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700702
Tejun Heo3264a8d2007-12-15 15:05:06 +0900703 ata_acpi_gtf_to_tf(dev, gtf, &tf);
704 if (prev_gtf) {
705 ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf);
706 pptf = &ptf;
707 }
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700708
Tejun Heo110f66d2009-09-16 04:17:28 +0900709 if (!ata_acpi_filter_tf(dev, &tf, pptf)) {
Tejun Heo3264a8d2007-12-15 15:05:06 +0900710 rtf = tf;
711 err_mask = ata_exec_internal(dev, &rtf, NULL,
712 DMA_NONE, NULL, 0, 0);
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700713
Tejun Heo3264a8d2007-12-15 15:05:06 +0900714 switch (err_mask) {
715 case 0:
716 level = KERN_DEBUG;
717 snprintf(msg, sizeof(msg), "succeeded");
718 rc = 1;
719 break;
Tejun Heo0e8634b2007-12-15 15:05:05 +0900720
Tejun Heo3264a8d2007-12-15 15:05:06 +0900721 case AC_ERR_DEV:
722 level = KERN_INFO;
723 snprintf(msg, sizeof(msg),
724 "rejected by device (Stat=0x%02x Err=0x%02x)",
725 rtf.command, rtf.feature);
726 rc = 0;
727 break;
Tejun Heo0e8634b2007-12-15 15:05:05 +0900728
Tejun Heo3264a8d2007-12-15 15:05:06 +0900729 default:
730 level = KERN_ERR;
731 snprintf(msg, sizeof(msg),
732 "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)",
733 err_mask, rtf.command, rtf.feature);
734 rc = -EIO;
735 break;
736 }
737 } else {
Tejun Heo0e8634b2007-12-15 15:05:05 +0900738 level = KERN_INFO;
Tejun Heo3264a8d2007-12-15 15:05:06 +0900739 snprintf(msg, sizeof(msg), "filtered out");
Tejun Heo0e8634b2007-12-15 15:05:05 +0900740 rc = 0;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900741 }
Robert Hancock65211482009-07-14 20:43:39 -0600742 descr = ata_get_cmd_descript(tf.command);
Tejun Heo4700c4b2007-05-15 03:28:16 +0900743
Tejun Heo0e8634b2007-12-15 15:05:05 +0900744 ata_dev_printk(dev, level,
Robert Hancock65211482009-07-14 20:43:39 -0600745 "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n",
Tejun Heo0e8634b2007-12-15 15:05:05 +0900746 tf.command, tf.feature, tf.nsect, tf.lbal,
Robert Hancock65211482009-07-14 20:43:39 -0600747 tf.lbam, tf.lbah, tf.device,
748 (descr ? descr : "unknown"), msg);
Tejun Heo0e8634b2007-12-15 15:05:05 +0900749
750 return rc;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700751}
752
753/**
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700754 * ata_acpi_exec_tfs - get then write drive taskfile settings
Tejun Heo67465442007-05-15 03:28:16 +0900755 * @dev: target ATA device
Martin Olsson98a17082009-04-22 18:21:29 +0200756 * @nr_executed: out parameter for the number of executed commands
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700757 *
Martin Olsson98a17082009-04-22 18:21:29 +0200758 * Evaluate _GTF and execute returned taskfiles.
Tejun Heo69b16a52007-05-15 03:28:16 +0900759 *
760 * LOCKING:
761 * EH context.
762 *
763 * RETURNS:
Tejun Heo66fa7f22007-12-15 15:05:04 +0900764 * Number of executed taskfiles on success, 0 if _GTF doesn't exist.
765 * -errno on other errors.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700766 */
Tejun Heo66fa7f22007-12-15 15:05:04 +0900767static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700768{
Tejun Heo3264a8d2007-12-15 15:05:06 +0900769 struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL;
Tejun Heo67465442007-05-15 03:28:16 +0900770 int gtf_count, i, rc;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700771
Tejun Heo67465442007-05-15 03:28:16 +0900772 /* get taskfiles */
Tejun Heo66fa7f22007-12-15 15:05:04 +0900773 rc = ata_dev_get_GTF(dev, &gtf);
774 if (rc < 0)
775 return rc;
776 gtf_count = rc;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700777
Tejun Heo67465442007-05-15 03:28:16 +0900778 /* execute them */
Tejun Heo3264a8d2007-12-15 15:05:06 +0900779 for (i = 0; i < gtf_count; i++, gtf++) {
780 rc = ata_acpi_run_tf(dev, gtf, pgtf);
Tejun Heo0e8634b2007-12-15 15:05:05 +0900781 if (rc < 0)
782 break;
Tejun Heo3264a8d2007-12-15 15:05:06 +0900783 if (rc) {
Tejun Heo0e8634b2007-12-15 15:05:05 +0900784 (*nr_executed)++;
Tejun Heo3264a8d2007-12-15 15:05:06 +0900785 pgtf = gtf;
786 }
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700787 }
788
Tejun Heo398e0782007-12-15 15:05:03 +0900789 ata_acpi_clear_gtf(dev);
Tejun Heo67465442007-05-15 03:28:16 +0900790
Tejun Heo0e8634b2007-12-15 15:05:05 +0900791 if (rc < 0)
792 return rc;
793 return 0;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700794}
795
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700796/**
797 * ata_acpi_push_id - send Identify data to drive
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900798 * @dev: target ATA device
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700799 *
800 * _SDD ACPI object: for SATA mode only
801 * Must be after Identify (Packet) Device -- uses its data
802 * ATM this function never returns a failure. It is an optional
803 * method and if it fails for whatever reason, we should still
804 * just keep going.
Tejun Heo69b16a52007-05-15 03:28:16 +0900805 *
806 * LOCKING:
807 * EH context.
808 *
809 * RETURNS:
810 * 0 on success, -errno on failure.
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700811 */
Tejun Heo67465442007-05-15 03:28:16 +0900812static int ata_acpi_push_id(struct ata_device *dev)
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700813{
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900814 struct ata_port *ap = dev->link->ap;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900815 int err;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900816 acpi_status status;
817 struct acpi_object_list input;
818 union acpi_object in_params[1];
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700819
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700820 if (ata_msg_probe(ap))
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900821 ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n",
Harvey Harrison7f5e4e82008-03-05 18:24:52 -0800822 __func__, dev->devno, ap->port_no);
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700823
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700824 /* Give the drive Identify data to the drive via the _SDD method */
825 /* _SDD: set up input parameters */
826 input.count = 1;
827 input.pointer = in_params;
828 in_params[0].type = ACPI_TYPE_BUFFER;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900829 in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS;
830 in_params[0].buffer.pointer = (u8 *)dev->id;
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700831 /* Output buffer: _SDD has no output */
832
833 /* It's OK for _SDD to be missing too. */
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900834 swap_buf_le16(dev->id, ATA_ID_WORDS);
Tejun Heofafbae82007-05-15 03:28:16 +0900835 status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL);
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900836 swap_buf_le16(dev->id, ATA_ID_WORDS);
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700837
838 err = ACPI_FAILURE(status) ? -EIO : 0;
Tejun Heo69b16a52007-05-15 03:28:16 +0900839 if (err < 0)
840 ata_dev_printk(dev, KERN_WARNING,
841 "ACPI _SDD failed (AE 0x%x)\n", status);
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700842
Tejun Heo67465442007-05-15 03:28:16 +0900843 return err;
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700844}
845
Tejun Heo67465442007-05-15 03:28:16 +0900846/**
Tejun Heo64578a32007-05-15 03:28:16 +0900847 * ata_acpi_on_suspend - ATA ACPI hook called on suspend
848 * @ap: target ATA port
849 *
850 * This function is called when @ap is about to be suspended. All
851 * devices are already put to sleep but the port_suspend() callback
852 * hasn't been executed yet. Error return from this function aborts
853 * suspend.
854 *
855 * LOCKING:
856 * EH context.
857 *
858 * RETURNS:
859 * 0 on success, -errno on failure.
860 */
861int ata_acpi_on_suspend(struct ata_port *ap)
862{
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900863 /* nada */
864 return 0;
Tejun Heo64578a32007-05-15 03:28:16 +0900865}
866
867/**
Tejun Heo67465442007-05-15 03:28:16 +0900868 * ata_acpi_on_resume - ATA ACPI hook called on resume
869 * @ap: target ATA port
870 *
871 * This function is called when @ap is resumed - right after port
872 * itself is resumed but before any EH action is taken.
873 *
874 * LOCKING:
875 * EH context.
876 */
877void ata_acpi_on_resume(struct ata_port *ap)
878{
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900879 const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
Tejun Heof58229f2007-08-06 18:36:23 +0900880 struct ata_device *dev;
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700881
Tejun Heo398e0782007-12-15 15:05:03 +0900882 if (ap->acpi_handle && gtm) {
883 /* _GTM valid */
884
885 /* restore timing parameters */
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900886 ata_acpi_stm(ap, gtm);
Tejun Heo64578a32007-05-15 03:28:16 +0900887
Tejun Heo398e0782007-12-15 15:05:03 +0900888 /* _GTF should immediately follow _STM so that it can
889 * use values set by _STM. Cache _GTF result and
890 * schedule _GTF.
891 */
Tejun Heo1eca4362008-11-03 20:03:17 +0900892 ata_for_each_dev(dev, &ap->link, ALL) {
Tejun Heo398e0782007-12-15 15:05:03 +0900893 ata_acpi_clear_gtf(dev);
Shaohua Li48feb3c2008-03-25 16:50:45 +0800894 if (ata_dev_enabled(dev) &&
895 ata_dev_get_GTF(dev, NULL) >= 0)
Tejun Heo398e0782007-12-15 15:05:03 +0900896 dev->flags |= ATA_DFLAG_ACPI_PENDING;
897 }
898 } else {
899 /* SATA _GTF needs to be evaulated after _SDD and
900 * there's no reason to evaluate IDE _GTF early
901 * without _STM. Clear cache and schedule _GTF.
902 */
Tejun Heo1eca4362008-11-03 20:03:17 +0900903 ata_for_each_dev(dev, &ap->link, ALL) {
Tejun Heo398e0782007-12-15 15:05:03 +0900904 ata_acpi_clear_gtf(dev);
Shaohua Li48feb3c2008-03-25 16:50:45 +0800905 if (ata_dev_enabled(dev))
906 dev->flags |= ATA_DFLAG_ACPI_PENDING;
Tejun Heo398e0782007-12-15 15:05:03 +0900907 }
908 }
Tejun Heo67465442007-05-15 03:28:16 +0900909}
910
911/**
Shaohua Libd3adca2007-11-02 09:32:38 +0800912 * ata_acpi_set_state - set the port power state
913 * @ap: target ATA port
914 * @state: state, on/off
915 *
916 * This function executes the _PS0/_PS3 ACPI method to set the power state.
917 * ACPI spec requires _PS0 when IDE power on and _PS3 when power off
918 */
919void ata_acpi_set_state(struct ata_port *ap, pm_message_t state)
920{
921 struct ata_device *dev;
922
923 if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA))
924 return;
925
926 /* channel first and then drives for power on and vica versa
927 for power off */
928 if (state.event == PM_EVENT_ON)
929 acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0);
930
Tejun Heo1eca4362008-11-03 20:03:17 +0900931 ata_for_each_dev(dev, &ap->link, ENABLED) {
932 if (dev->acpi_handle)
Shaohua Libd3adca2007-11-02 09:32:38 +0800933 acpi_bus_set_power(dev->acpi_handle,
934 state.event == PM_EVENT_ON ?
935 ACPI_STATE_D0 : ACPI_STATE_D3);
936 }
937 if (state.event != PM_EVENT_ON)
938 acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3);
939}
940
941/**
Tejun Heo67465442007-05-15 03:28:16 +0900942 * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration
943 * @dev: target ATA device
944 *
945 * This function is called when @dev is about to be configured.
946 * IDENTIFY data might have been modified after this hook is run.
947 *
948 * LOCKING:
949 * EH context.
950 *
951 * RETURNS:
952 * Positive number if IDENTIFY data needs to be refreshed, 0 if not,
953 * -errno on failure.
954 */
955int ata_acpi_on_devcfg(struct ata_device *dev)
956{
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900957 struct ata_port *ap = dev->link->ap;
958 struct ata_eh_context *ehc = &ap->link.eh_context;
Tejun Heo67465442007-05-15 03:28:16 +0900959 int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA;
Tejun Heo66fa7f22007-12-15 15:05:04 +0900960 int nr_executed = 0;
Tejun Heo67465442007-05-15 03:28:16 +0900961 int rc;
962
Tejun Heo67465442007-05-15 03:28:16 +0900963 if (!dev->acpi_handle)
964 return 0;
965
966 /* do we need to do _GTF? */
967 if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) &&
968 !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET)))
969 return 0;
970
971 /* do _SDD if SATA */
972 if (acpi_sata) {
973 rc = ata_acpi_push_id(dev);
974 if (rc)
975 goto acpi_err;
976 }
977
978 /* do _GTF */
Tejun Heo66fa7f22007-12-15 15:05:04 +0900979 rc = ata_acpi_exec_tfs(dev, &nr_executed);
980 if (rc)
Tejun Heo67465442007-05-15 03:28:16 +0900981 goto acpi_err;
982
983 dev->flags &= ~ATA_DFLAG_ACPI_PENDING;
984
985 /* refresh IDENTIFY page if any _GTF command has been executed */
Tejun Heo66fa7f22007-12-15 15:05:04 +0900986 if (nr_executed) {
Tejun Heo67465442007-05-15 03:28:16 +0900987 rc = ata_dev_reread_id(dev, 0);
988 if (rc < 0) {
989 ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY "
990 "after ACPI commands\n");
991 return rc;
992 }
993 }
994
995 return 0;
996
997 acpi_err:
Tejun Heo66fa7f22007-12-15 15:05:04 +0900998 /* ignore evaluation failure if we can continue safely */
999 if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
1000 return 0;
Tejun Heo67465442007-05-15 03:28:16 +09001001
Tejun Heo66fa7f22007-12-15 15:05:04 +09001002 /* fail and let EH retry once more for unknown IO errors */
1003 if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) {
1004 dev->flags |= ATA_DFLAG_ACPI_FAILED;
1005 return rc;
Tejun Heo67465442007-05-15 03:28:16 +09001006 }
Tejun Heo66fa7f22007-12-15 15:05:04 +09001007
1008 ata_dev_printk(dev, KERN_WARNING,
1009 "ACPI: failed the second time, disabled\n");
1010 dev->acpi_handle = NULL;
1011
1012 /* We can safely continue if no _GTF command has been executed
1013 * and port is not frozen.
1014 */
1015 if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
1016 return 0;
1017
Tejun Heo67465442007-05-15 03:28:16 +09001018 return rc;
1019}
Tejun Heo562f0c22007-12-15 15:05:01 +09001020
1021/**
1022 * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled
1023 * @dev: target ATA device
1024 *
1025 * This function is called when @dev is about to be disabled.
1026 *
1027 * LOCKING:
1028 * EH context.
1029 */
1030void ata_acpi_on_disable(struct ata_device *dev)
1031{
Tejun Heo398e0782007-12-15 15:05:03 +09001032 ata_acpi_clear_gtf(dev);
Tejun Heo562f0c22007-12-15 15:05:01 +09001033}