blob: 8b5ea399a4f4fa7dfe04765292f31af4c8750fba [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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090018#include <linux/slab.h>
Matthew Garrett237d8442007-10-03 01:24:16 +010019#include <scsi/scsi_device.h>
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070020#include "libata.h"
21
22#include <acpi/acpi_bus.h>
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070023
Tejun Heo110f66d2009-09-16 04:17:28 +090024unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT;
Tejun Heo3264a8d2007-12-15 15:05:06 +090025module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644);
Tejun Heofa5b5612009-09-16 04:17:02 +090026MODULE_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 +090027
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070028#define NO_PORT_MULT 0xffff
Jeff Garzik2dcb4072007-10-19 06:42:56 -040029#define SATA_ADR(root, pmp) (((root) << 16) | (pmp))
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070030
31#define REGS_PER_GTF 7
Tejun Heo4700c4b2007-05-15 03:28:16 +090032struct ata_acpi_gtf {
33 u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */
34} __packed;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070035
Alan Coxca426632007-03-08 23:13:50 +000036/*
37 * Helper - belongs in the PCI layer somewhere eventually
38 */
39static int is_pci_dev(struct device *dev)
40{
41 return (dev->bus == &pci_bus_type);
42}
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070043
Tejun Heo398e0782007-12-15 15:05:03 +090044static void ata_acpi_clear_gtf(struct ata_device *dev)
45{
46 kfree(dev->gtf_cache);
47 dev->gtf_cache = NULL;
48}
49
Tejun Heod0df8b5d2007-09-23 13:19:54 +090050/**
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 */
63void ata_acpi_associate_sata_port(struct ata_port *ap)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070064{
Tejun Heod0df8b5d2007-09-23 13:19:54 +090065 WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA));
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070066
Tejun Heo071f44b2008-04-07 22:47:22 +090067 if (!sata_pmp_attached(ap)) {
Lin Ming439913f2010-01-28 10:53:19 +080068 u64 adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
Tejun Heod0df8b5d2007-09-23 13:19:54 +090069
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
Tejun Heo1eca4362008-11-03 20:03:17 +090077 ata_for_each_link(link, ap, EDGE) {
Lin Ming439913f2010-01-28 10:53:19 +080078 u64 adr = SATA_ADR(ap->port_no, link->pmp);
Tejun Heod0df8b5d2007-09-23 13:19:54 +090079
80 link->device->acpi_handle =
81 acpi_get_child(ap->host->acpi_handle, adr);
82 }
83 }
Tejun Heofafbae82007-05-15 03:28:16 +090084}
Alan Coxca426632007-03-08 23:13:50 +000085
Tejun Heofafbae82007-05-15 03:28:16 +090086static void ata_acpi_associate_ide_port(struct ata_port *ap)
87{
88 int max_devices, i;
89
90 ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no);
91 if (!ap->acpi_handle)
92 return;
93
94 max_devices = 1;
95 if (ap->flags & ATA_FLAG_SLAVE_POSS)
96 max_devices++;
97
98 for (i = 0; i < max_devices; i++) {
Tejun Heo9af5c9c2007-08-06 18:36:22 +090099 struct ata_device *dev = &ap->link.device[i];
Tejun Heofafbae82007-05-15 03:28:16 +0900100
101 dev->acpi_handle = acpi_get_child(ap->acpi_handle, i);
102 }
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900103
104 if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0)
105 ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700106}
107
Holger Macht664d0802008-06-03 20:27:59 +0200108/* @ap and @dev are the same as ata_acpi_handle_hotplug() */
109static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev)
110{
111 if (dev)
112 dev->flags |= ATA_DFLAG_DETACH;
113 else {
114 struct ata_link *tlink;
115 struct ata_device *tdev;
116
Tejun Heo1eca4362008-11-03 20:03:17 +0900117 ata_for_each_link(tlink, ap, EDGE)
118 ata_for_each_dev(tdev, tlink, ALL)
Holger Macht664d0802008-06-03 20:27:59 +0200119 tdev->flags |= ATA_DFLAG_DETACH;
120 }
121
122 ata_port_schedule_eh(ap);
123}
124
125/**
126 * ata_acpi_handle_hotplug - ACPI event handler backend
127 * @ap: ATA port ACPI event occurred
128 * @dev: ATA device ACPI event occurred (can be NULL)
129 * @event: ACPI event which occurred
Holger Macht664d0802008-06-03 20:27:59 +0200130 *
131 * All ACPI bay / device realted events end up in this function. If
132 * the event is port-wide @dev is NULL. If the event is specific to a
133 * device, @dev points to it.
134 *
135 * Hotplug (as opposed to unplug) notification is always handled as
136 * port-wide while unplug only kills the target device on device-wide
137 * event.
138 *
139 * LOCKING:
140 * ACPI notify handler context. May sleep.
141 */
142static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
Shaohua Lif730ae12008-08-28 10:05:45 +0800143 u32 event)
Matthew Garrett237d8442007-10-03 01:24:16 +0100144{
Holger Macht664d0802008-06-03 20:27:59 +0200145 struct ata_eh_info *ehi = &ap->link.eh_info;
Tejun Heo233f1122008-03-12 14:24:43 +0900146 int wait = 0;
147 unsigned long flags;
Zhang Rui3c1e3892008-07-11 09:42:03 -0400148
Holger Macht664d0802008-06-03 20:27:59 +0200149 spin_lock_irqsave(ap->lock, flags);
Shaohua Lif730ae12008-08-28 10:05:45 +0800150 /*
151 * When dock driver calls into the routine, it will always use
152 * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and
153 * ACPI_NOTIFY_EJECT_REQUEST for remove
154 */
Tejun Heo233f1122008-03-12 14:24:43 +0900155 switch (event) {
156 case ACPI_NOTIFY_BUS_CHECK:
157 case ACPI_NOTIFY_DEVICE_CHECK:
158 ata_ehi_push_desc(ehi, "ACPI event");
Jeff Garzikc85665f2008-05-19 17:56:10 -0400159
Shaohua Lif730ae12008-08-28 10:05:45 +0800160 ata_ehi_hotplugged(ehi);
161 ata_port_freeze(ap);
Holger Macht664d0802008-06-03 20:27:59 +0200162 break;
163 case ACPI_NOTIFY_EJECT_REQUEST:
164 ata_ehi_push_desc(ehi, "ACPI event");
165
Holger Macht664d0802008-06-03 20:27:59 +0200166 ata_acpi_detach_device(ap, dev);
167 wait = 1;
168 break;
Matthew Garrett237d8442007-10-03 01:24:16 +0100169 }
170
Matthew Garrettae6c23c2008-05-19 17:29:34 +0100171 spin_unlock_irqrestore(ap->lock, flags);
172
Shaohua Lif730ae12008-08-28 10:05:45 +0800173 if (wait)
Matthew Garrettae6c23c2008-05-19 17:29:34 +0100174 ata_port_wait_eh(ap);
Holger Macht664d0802008-06-03 20:27:59 +0200175}
176
177static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data)
178{
179 struct ata_device *dev = data;
180
Shaohua Lif730ae12008-08-28 10:05:45 +0800181 ata_acpi_handle_hotplug(dev->link->ap, dev, event);
Holger Macht664d0802008-06-03 20:27:59 +0200182}
183
184static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data)
185{
186 struct ata_port *ap = data;
187
Shaohua Lif730ae12008-08-28 10:05:45 +0800188 ata_acpi_handle_hotplug(ap, NULL, event);
Matthew Garrett237d8442007-10-03 01:24:16 +0100189}
190
Shaohua Li1253f7a2008-08-28 10:06:16 +0800191static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev,
192 u32 event)
193{
194 struct kobject *kobj = NULL;
195 char event_string[20];
196 char *envp[] = { event_string, NULL };
197
198 if (dev) {
199 if (dev->sdev)
200 kobj = &dev->sdev->sdev_gendev.kobj;
201 } else
202 kobj = &ap->dev->kobj;
203
204 if (kobj) {
205 snprintf(event_string, 20, "BAY_EVENT=%d", event);
206 kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
207 }
208}
209
210static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data)
211{
212 ata_acpi_uevent(data, NULL, event);
213}
214
215static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data)
216{
217 struct ata_device *dev = data;
218 ata_acpi_uevent(dev->link->ap, dev, event);
219}
220
221static struct acpi_dock_ops ata_acpi_dev_dock_ops = {
222 .handler = ata_acpi_dev_notify_dock,
223 .uevent = ata_acpi_dev_uevent,
224};
225
226static struct acpi_dock_ops ata_acpi_ap_dock_ops = {
227 .handler = ata_acpi_ap_notify_dock,
228 .uevent = ata_acpi_ap_uevent,
229};
230
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700231/**
Tejun Heofafbae82007-05-15 03:28:16 +0900232 * ata_acpi_associate - associate ATA host with ACPI objects
233 * @host: target ATA host
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700234 *
Tejun Heofafbae82007-05-15 03:28:16 +0900235 * Look up ACPI objects associated with @host and initialize
236 * acpi_handle fields of @host, its ports and devices accordingly.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700237 *
Tejun Heofafbae82007-05-15 03:28:16 +0900238 * LOCKING:
239 * EH context.
240 *
241 * RETURNS:
242 * 0 on success, -errno on failure.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700243 */
Tejun Heofafbae82007-05-15 03:28:16 +0900244void ata_acpi_associate(struct ata_host *host)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700245{
Matthew Garrett237d8442007-10-03 01:24:16 +0100246 int i, j;
Alan Coxca426632007-03-08 23:13:50 +0000247
Tejun Heofafbae82007-05-15 03:28:16 +0900248 if (!is_pci_dev(host->dev) || libata_noacpi)
249 return;
Alan Coxca426632007-03-08 23:13:50 +0000250
Tejun Heofafbae82007-05-15 03:28:16 +0900251 host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev);
252 if (!host->acpi_handle)
253 return;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700254
Tejun Heofafbae82007-05-15 03:28:16 +0900255 for (i = 0; i < host->n_ports; i++) {
256 struct ata_port *ap = host->ports[i];
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700257
Tejun Heofafbae82007-05-15 03:28:16 +0900258 if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA)
259 ata_acpi_associate_sata_port(ap);
260 else
261 ata_acpi_associate_ide_port(ap);
Matthew Garrett237d8442007-10-03 01:24:16 +0100262
Tejun Heo233f1122008-03-12 14:24:43 +0900263 if (ap->acpi_handle) {
Tejun Heo233f1122008-03-12 14:24:43 +0900264 /* we might be on a docking station */
265 register_hotplug_dock_device(ap->acpi_handle,
Shaohua Li1253f7a2008-08-28 10:06:16 +0800266 &ata_acpi_ap_dock_ops, ap);
Tejun Heo233f1122008-03-12 14:24:43 +0900267 }
Matthew Garrett237d8442007-10-03 01:24:16 +0100268
269 for (j = 0; j < ata_link_max_devices(&ap->link); j++) {
270 struct ata_device *dev = &ap->link.device[j];
271
Tejun Heo233f1122008-03-12 14:24:43 +0900272 if (dev->acpi_handle) {
Tejun Heo233f1122008-03-12 14:24:43 +0900273 /* we might be on a docking station */
274 register_hotplug_dock_device(dev->acpi_handle,
Shaohua Li1253f7a2008-08-28 10:06:16 +0800275 &ata_acpi_dev_dock_ops, dev);
Tejun Heo233f1122008-03-12 14:24:43 +0900276 }
Matthew Garrett237d8442007-10-03 01:24:16 +0100277 }
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700278 }
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700279}
280
281/**
Tejun Heo562f0c22007-12-15 15:05:01 +0900282 * ata_acpi_dissociate - dissociate ATA host from ACPI objects
283 * @host: target ATA host
284 *
285 * This function is called during driver detach after the whole host
286 * is shut down.
287 *
288 * LOCKING:
289 * EH context.
290 */
291void ata_acpi_dissociate(struct ata_host *host)
292{
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900293 int i;
294
295 /* Restore initial _GTM values so that driver which attaches
296 * afterward can use them too.
297 */
298 for (i = 0; i < host->n_ports; i++) {
299 struct ata_port *ap = host->ports[i];
300 const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
301
302 if (ap->acpi_handle && gtm)
303 ata_acpi_stm(ap, gtm);
304 }
Tejun Heo562f0c22007-12-15 15:05:01 +0900305}
306
307/**
Tejun Heo64578a32007-05-15 03:28:16 +0900308 * ata_acpi_gtm - execute _GTM
309 * @ap: target ATA port
310 * @gtm: out parameter for _GTM result
311 *
312 * Evaluate _GTM and store the result in @gtm.
313 *
314 * LOCKING:
315 * EH context.
316 *
317 * RETURNS:
318 * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure.
319 */
Tejun Heo0d02f0b2007-12-15 15:04:57 +0900320int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm)
Tejun Heo64578a32007-05-15 03:28:16 +0900321{
322 struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER };
323 union acpi_object *out_obj;
324 acpi_status status;
325 int rc = 0;
326
327 status = acpi_evaluate_object(ap->acpi_handle, "_GTM", NULL, &output);
328
329 rc = -ENOENT;
330 if (status == AE_NOT_FOUND)
331 goto out_free;
332
333 rc = -EINVAL;
334 if (ACPI_FAILURE(status)) {
335 ata_port_printk(ap, KERN_ERR,
336 "ACPI get timing mode failed (AE 0x%x)\n",
337 status);
338 goto out_free;
339 }
340
341 out_obj = output.pointer;
342 if (out_obj->type != ACPI_TYPE_BUFFER) {
343 ata_port_printk(ap, KERN_WARNING,
344 "_GTM returned unexpected object type 0x%x\n",
345 out_obj->type);
346
347 goto out_free;
348 }
349
350 if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) {
351 ata_port_printk(ap, KERN_ERR,
352 "_GTM returned invalid length %d\n",
353 out_obj->buffer.length);
354 goto out_free;
355 }
356
357 memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm));
358 rc = 0;
359 out_free:
360 kfree(output.pointer);
361 return rc;
362}
363
Alan Coxbadff032007-10-04 21:28:18 +0100364EXPORT_SYMBOL_GPL(ata_acpi_gtm);
365
Tejun Heo64578a32007-05-15 03:28:16 +0900366/**
367 * ata_acpi_stm - execute _STM
368 * @ap: target ATA port
369 * @stm: timing parameter to _STM
370 *
371 * Evaluate _STM with timing parameter @stm.
372 *
373 * LOCKING:
374 * EH context.
375 *
376 * RETURNS:
377 * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure.
378 */
Tejun Heo0d02f0b2007-12-15 15:04:57 +0900379int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm)
Tejun Heo64578a32007-05-15 03:28:16 +0900380{
381 acpi_status status;
Tejun Heo0d02f0b2007-12-15 15:04:57 +0900382 struct ata_acpi_gtm stm_buf = *stm;
Tejun Heo64578a32007-05-15 03:28:16 +0900383 struct acpi_object_list input;
384 union acpi_object in_params[3];
385
386 in_params[0].type = ACPI_TYPE_BUFFER;
387 in_params[0].buffer.length = sizeof(struct ata_acpi_gtm);
Tejun Heo0d02f0b2007-12-15 15:04:57 +0900388 in_params[0].buffer.pointer = (u8 *)&stm_buf;
Tejun Heo64578a32007-05-15 03:28:16 +0900389 /* Buffers for id may need byteswapping ? */
390 in_params[1].type = ACPI_TYPE_BUFFER;
391 in_params[1].buffer.length = 512;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900392 in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id;
Tejun Heo64578a32007-05-15 03:28:16 +0900393 in_params[2].type = ACPI_TYPE_BUFFER;
394 in_params[2].buffer.length = 512;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900395 in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id;
Tejun Heo64578a32007-05-15 03:28:16 +0900396
397 input.count = 3;
398 input.pointer = in_params;
399
400 status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL);
401
402 if (status == AE_NOT_FOUND)
403 return -ENOENT;
404 if (ACPI_FAILURE(status)) {
405 ata_port_printk(ap, KERN_ERR,
406 "ACPI set timing mode failed (status=0x%x)\n", status);
407 return -EINVAL;
408 }
409 return 0;
410}
411
Alan Coxbadff032007-10-04 21:28:18 +0100412EXPORT_SYMBOL_GPL(ata_acpi_stm);
413
Tejun Heo64578a32007-05-15 03:28:16 +0900414/**
Tejun Heo4700c4b2007-05-15 03:28:16 +0900415 * ata_dev_get_GTF - get the drive bootup default taskfile settings
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900416 * @dev: target ATA device
Tejun Heo4700c4b2007-05-15 03:28:16 +0900417 * @gtf: output parameter for buffer containing _GTF taskfile arrays
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700418 *
419 * This applies to both PATA and SATA drives.
420 *
421 * The _GTF method has no input parameters.
422 * It returns a variable number of register set values (registers
423 * hex 1F1..1F7, taskfiles).
424 * The <variable number> is not known in advance, so have ACPI-CA
425 * allocate the buffer as needed and return it, then free it later.
426 *
Tejun Heo4700c4b2007-05-15 03:28:16 +0900427 * LOCKING:
428 * EH context.
429 *
430 * RETURNS:
Tejun Heo66fa7f22007-12-15 15:05:04 +0900431 * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL
432 * if _GTF is invalid.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700433 */
Tejun Heo398e0782007-12-15 15:05:03 +0900434static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700435{
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900436 struct ata_port *ap = dev->link->ap;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900437 acpi_status status;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900438 struct acpi_buffer output;
439 union acpi_object *out_obj;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900440 int rc = 0;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700441
Tejun Heo398e0782007-12-15 15:05:03 +0900442 /* if _GTF is cached, use the cached value */
443 if (dev->gtf_cache) {
444 out_obj = dev->gtf_cache;
445 goto done;
446 }
447
Tejun Heo4700c4b2007-05-15 03:28:16 +0900448 /* set up output buffer */
449 output.length = ACPI_ALLOCATE_BUFFER;
450 output.pointer = NULL; /* ACPI-CA sets this; save/free it later */
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700451
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700452 if (ata_msg_probe(ap))
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900453 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n",
Harvey Harrison7f5e4e82008-03-05 18:24:52 -0800454 __func__, ap->port_no);
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700455
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700456 /* _GTF has no input parameters */
Tejun Heo4700c4b2007-05-15 03:28:16 +0900457 status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output);
Tejun Heo398e0782007-12-15 15:05:03 +0900458 out_obj = dev->gtf_cache = output.pointer;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900459
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700460 if (ACPI_FAILURE(status)) {
Tejun Heo4700c4b2007-05-15 03:28:16 +0900461 if (status != AE_NOT_FOUND) {
462 ata_dev_printk(dev, KERN_WARNING,
463 "_GTF evaluation failed (AE 0x%x)\n",
464 status);
Tejun Heo66fa7f22007-12-15 15:05:04 +0900465 rc = -EINVAL;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900466 }
467 goto out_free;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700468 }
469
470 if (!output.length || !output.pointer) {
471 if (ata_msg_probe(ap))
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900472 ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: "
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700473 "length or ptr is NULL (0x%llx, 0x%p)\n",
Harvey Harrison7f5e4e82008-03-05 18:24:52 -0800474 __func__,
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700475 (unsigned long long)output.length,
476 output.pointer);
Tejun Heo66fa7f22007-12-15 15:05:04 +0900477 rc = -EINVAL;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900478 goto out_free;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700479 }
480
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700481 if (out_obj->type != ACPI_TYPE_BUFFER) {
Tejun Heo69b16a52007-05-15 03:28:16 +0900482 ata_dev_printk(dev, KERN_WARNING,
483 "_GTF unexpected object type 0x%x\n",
484 out_obj->type);
Tejun Heo66fa7f22007-12-15 15:05:04 +0900485 rc = -EINVAL;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900486 goto out_free;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700487 }
488
Tejun Heo4700c4b2007-05-15 03:28:16 +0900489 if (out_obj->buffer.length % REGS_PER_GTF) {
Tejun Heo69b16a52007-05-15 03:28:16 +0900490 ata_dev_printk(dev, KERN_WARNING,
491 "unexpected _GTF length (%d)\n",
492 out_obj->buffer.length);
Tejun Heo66fa7f22007-12-15 15:05:04 +0900493 rc = -EINVAL;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900494 goto out_free;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700495 }
496
Tejun Heo398e0782007-12-15 15:05:03 +0900497 done:
Tejun Heo4700c4b2007-05-15 03:28:16 +0900498 rc = out_obj->buffer.length / REGS_PER_GTF;
Tejun Heo398e0782007-12-15 15:05:03 +0900499 if (gtf) {
500 *gtf = (void *)out_obj->buffer.pointer;
501 if (ata_msg_probe(ap))
502 ata_dev_printk(dev, KERN_DEBUG,
503 "%s: returning gtf=%p, gtf_count=%d\n",
Harvey Harrison7f5e4e82008-03-05 18:24:52 -0800504 __func__, *gtf, rc);
Tejun Heo398e0782007-12-15 15:05:03 +0900505 }
Tejun Heo4700c4b2007-05-15 03:28:16 +0900506 return rc;
507
508 out_free:
Tejun Heo398e0782007-12-15 15:05:03 +0900509 ata_acpi_clear_gtf(dev);
Tejun Heo4700c4b2007-05-15 03:28:16 +0900510 return rc;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700511}
512
Tejun Heo7c77fa42007-12-18 16:33:03 +0900513/**
514 * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter
515 * @dev: target device
516 * @gtm: GTM parameter to use
517 *
518 * Determine xfermask for @dev from @gtm.
519 *
520 * LOCKING:
521 * None.
522 *
523 * RETURNS:
524 * Determined xfermask.
525 */
526unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
527 const struct ata_acpi_gtm *gtm)
528{
Tejun Heoa0f79b92007-12-18 16:33:05 +0900529 unsigned long xfer_mask = 0;
530 unsigned int type;
531 int unit;
532 u8 mode;
Tejun Heo7c77fa42007-12-18 16:33:03 +0900533
534 /* we always use the 0 slot for crap hardware */
535 unit = dev->devno;
536 if (!(gtm->flags & 0x10))
537 unit = 0;
538
Tejun Heoa0f79b92007-12-18 16:33:05 +0900539 /* PIO */
540 mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio);
541 xfer_mask |= ata_xfer_mode2mask(mode);
Tejun Heo7c77fa42007-12-18 16:33:03 +0900542
543 /* See if we have MWDMA or UDMA data. We don't bother with
544 * MWDMA if UDMA is available as this means the BIOS set UDMA
545 * and our error changedown if it works is UDMA to PIO anyway.
546 */
Tejun Heoa0f79b92007-12-18 16:33:05 +0900547 if (!(gtm->flags & (1 << (2 * unit))))
548 type = ATA_SHIFT_MWDMA;
549 else
550 type = ATA_SHIFT_UDMA;
Tejun Heo7c77fa42007-12-18 16:33:03 +0900551
Tejun Heoa0f79b92007-12-18 16:33:05 +0900552 mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma);
553 xfer_mask |= ata_xfer_mode2mask(mode);
554
555 return xfer_mask;
Tejun Heo7c77fa42007-12-18 16:33:03 +0900556}
557EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask);
558
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700559/**
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400560 * ata_acpi_cbl_80wire - Check for 80 wire cable
561 * @ap: Port to check
Tejun Heo021ee9a2007-12-18 16:33:06 +0900562 * @gtm: GTM data to use
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400563 *
Tejun Heo021ee9a2007-12-18 16:33:06 +0900564 * Return 1 if the @gtm indicates the BIOS selected an 80wire mode.
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400565 */
Tejun Heo021ee9a2007-12-18 16:33:06 +0900566int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm)
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400567{
Tejun Heo021ee9a2007-12-18 16:33:06 +0900568 struct ata_device *dev;
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400569
Tejun Heo1eca4362008-11-03 20:03:17 +0900570 ata_for_each_dev(dev, &ap->link, ENABLED) {
Tejun Heo021ee9a2007-12-18 16:33:06 +0900571 unsigned long xfer_mask, udma_mask;
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400572
Tejun Heo021ee9a2007-12-18 16:33:06 +0900573 xfer_mask = ata_acpi_gtm_xfermask(dev, gtm);
574 ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask);
575
576 if (udma_mask & ~ATA_UDMA_MASK_40C)
577 return 1;
578 }
579
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400580 return 0;
581}
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400582EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire);
583
Tejun Heo3264a8d2007-12-15 15:05:06 +0900584static void ata_acpi_gtf_to_tf(struct ata_device *dev,
585 const struct ata_acpi_gtf *gtf,
586 struct ata_taskfile *tf)
587{
588 ata_tf_init(dev, tf);
589
590 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
591 tf->protocol = ATA_PROT_NODATA;
592 tf->feature = gtf->tf[0]; /* 0x1f1 */
593 tf->nsect = gtf->tf[1]; /* 0x1f2 */
594 tf->lbal = gtf->tf[2]; /* 0x1f3 */
595 tf->lbam = gtf->tf[3]; /* 0x1f4 */
596 tf->lbah = gtf->tf[4]; /* 0x1f5 */
597 tf->device = gtf->tf[5]; /* 0x1f6 */
598 tf->command = gtf->tf[6]; /* 0x1f7 */
599}
600
Tejun Heo110f66d2009-09-16 04:17:28 +0900601static int ata_acpi_filter_tf(struct ata_device *dev,
602 const struct ata_taskfile *tf,
Tejun Heo3264a8d2007-12-15 15:05:06 +0900603 const struct ata_taskfile *ptf)
604{
Tejun Heo110f66d2009-09-16 04:17:28 +0900605 if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) {
Tejun Heo3264a8d2007-12-15 15:05:06 +0900606 /* libata doesn't use ACPI to configure transfer mode.
607 * It will only confuse device configuration. Skip.
608 */
609 if (tf->command == ATA_CMD_SET_FEATURES &&
610 tf->feature == SETFEATURES_XFER)
611 return 1;
612 }
613
Tejun Heo110f66d2009-09-16 04:17:28 +0900614 if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) {
Tejun Heo3264a8d2007-12-15 15:05:06 +0900615 /* BIOS writers, sorry but we don't wanna lock
616 * features unless the user explicitly said so.
617 */
618
619 /* DEVICE CONFIGURATION FREEZE LOCK */
620 if (tf->command == ATA_CMD_CONF_OVERLAY &&
621 tf->feature == ATA_DCO_FREEZE_LOCK)
622 return 1;
623
624 /* SECURITY FREEZE LOCK */
625 if (tf->command == ATA_CMD_SEC_FREEZE_LOCK)
626 return 1;
627
628 /* SET MAX LOCK and SET MAX FREEZE LOCK */
629 if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) &&
630 tf->command == ATA_CMD_SET_MAX &&
631 (tf->feature == ATA_SET_MAX_LOCK ||
632 tf->feature == ATA_SET_MAX_FREEZE_LOCK))
633 return 1;
634 }
635
Tejun Heofa5b5612009-09-16 04:17:02 +0900636 if (tf->command == ATA_CMD_SET_FEATURES &&
637 tf->feature == SETFEATURES_SATA_ENABLE) {
Tejun Heob3449912008-07-06 23:15:03 +0900638 /* inhibit enabling DIPM */
Tejun Heo110f66d2009-09-16 04:17:28 +0900639 if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM &&
Tejun Heob3449912008-07-06 23:15:03 +0900640 tf->nsect == SATA_DIPM)
641 return 1;
Tejun Heofa5b5612009-09-16 04:17:02 +0900642
643 /* inhibit FPDMA non-zero offset */
Tejun Heo110f66d2009-09-16 04:17:28 +0900644 if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET &&
Tejun Heofa5b5612009-09-16 04:17:02 +0900645 (tf->nsect == SATA_FPDMA_OFFSET ||
646 tf->nsect == SATA_FPDMA_IN_ORDER))
647 return 1;
648
649 /* inhibit FPDMA auto activation */
Tejun Heo110f66d2009-09-16 04:17:28 +0900650 if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA &&
Tejun Heofa5b5612009-09-16 04:17:02 +0900651 tf->nsect == SATA_FPDMA_AA)
652 return 1;
Tejun Heob3449912008-07-06 23:15:03 +0900653 }
654
Tejun Heo3264a8d2007-12-15 15:05:06 +0900655 return 0;
656}
657
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400658/**
Tejun Heo0e8634b2007-12-15 15:05:05 +0900659 * ata_acpi_run_tf - send taskfile registers to host controller
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900660 * @dev: target ATA device
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700661 * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7)
662 *
663 * Outputs ATA taskfile to standard ATA host controller using MMIO
664 * or PIO as indicated by the ATA_FLAG_MMIO flag.
665 * Writes the control, feature, nsect, lbal, lbam, and lbah registers.
666 * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
667 * hob_lbal, hob_lbam, and hob_lbah.
668 *
669 * This function waits for idle (!BUSY and !DRQ) after writing
670 * registers. If the control register has a new value, this
671 * function also waits for idle after writing control and before
672 * writing the remaining registers.
673 *
Tejun Heo4700c4b2007-05-15 03:28:16 +0900674 * LOCKING:
675 * EH context.
676 *
677 * RETURNS:
Tejun Heo3264a8d2007-12-15 15:05:06 +0900678 * 1 if command is executed successfully. 0 if ignored, rejected or
679 * filtered out, -errno on other errors.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700680 */
Tejun Heo0e8634b2007-12-15 15:05:05 +0900681static int ata_acpi_run_tf(struct ata_device *dev,
Tejun Heo3264a8d2007-12-15 15:05:06 +0900682 const struct ata_acpi_gtf *gtf,
683 const struct ata_acpi_gtf *prev_gtf)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700684{
Tejun Heo3264a8d2007-12-15 15:05:06 +0900685 struct ata_taskfile *pptf = NULL;
686 struct ata_taskfile tf, ptf, rtf;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900687 unsigned int err_mask;
Tejun Heo0e8634b2007-12-15 15:05:05 +0900688 const char *level;
Robert Hancock65211482009-07-14 20:43:39 -0600689 const char *descr;
Tejun Heo0e8634b2007-12-15 15:05:05 +0900690 char msg[60];
691 int rc;
Jeff Garzikfc16c252007-02-24 21:05:01 -0500692
Tejun Heo4700c4b2007-05-15 03:28:16 +0900693 if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0)
694 && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0)
695 && (gtf->tf[6] == 0))
696 return 0;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700697
Tejun Heo3264a8d2007-12-15 15:05:06 +0900698 ata_acpi_gtf_to_tf(dev, gtf, &tf);
699 if (prev_gtf) {
700 ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf);
701 pptf = &ptf;
702 }
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700703
Tejun Heo110f66d2009-09-16 04:17:28 +0900704 if (!ata_acpi_filter_tf(dev, &tf, pptf)) {
Tejun Heo3264a8d2007-12-15 15:05:06 +0900705 rtf = tf;
706 err_mask = ata_exec_internal(dev, &rtf, NULL,
707 DMA_NONE, NULL, 0, 0);
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700708
Tejun Heo3264a8d2007-12-15 15:05:06 +0900709 switch (err_mask) {
710 case 0:
711 level = KERN_DEBUG;
712 snprintf(msg, sizeof(msg), "succeeded");
713 rc = 1;
714 break;
Tejun Heo0e8634b2007-12-15 15:05:05 +0900715
Tejun Heo3264a8d2007-12-15 15:05:06 +0900716 case AC_ERR_DEV:
717 level = KERN_INFO;
718 snprintf(msg, sizeof(msg),
719 "rejected by device (Stat=0x%02x Err=0x%02x)",
720 rtf.command, rtf.feature);
721 rc = 0;
722 break;
Tejun Heo0e8634b2007-12-15 15:05:05 +0900723
Tejun Heo3264a8d2007-12-15 15:05:06 +0900724 default:
725 level = KERN_ERR;
726 snprintf(msg, sizeof(msg),
727 "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)",
728 err_mask, rtf.command, rtf.feature);
729 rc = -EIO;
730 break;
731 }
732 } else {
Tejun Heo0e8634b2007-12-15 15:05:05 +0900733 level = KERN_INFO;
Tejun Heo3264a8d2007-12-15 15:05:06 +0900734 snprintf(msg, sizeof(msg), "filtered out");
Tejun Heo0e8634b2007-12-15 15:05:05 +0900735 rc = 0;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900736 }
Robert Hancock65211482009-07-14 20:43:39 -0600737 descr = ata_get_cmd_descript(tf.command);
Tejun Heo4700c4b2007-05-15 03:28:16 +0900738
Tejun Heo0e8634b2007-12-15 15:05:05 +0900739 ata_dev_printk(dev, level,
Robert Hancock65211482009-07-14 20:43:39 -0600740 "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n",
Tejun Heo0e8634b2007-12-15 15:05:05 +0900741 tf.command, tf.feature, tf.nsect, tf.lbal,
Robert Hancock65211482009-07-14 20:43:39 -0600742 tf.lbam, tf.lbah, tf.device,
743 (descr ? descr : "unknown"), msg);
Tejun Heo0e8634b2007-12-15 15:05:05 +0900744
745 return rc;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700746}
747
748/**
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700749 * ata_acpi_exec_tfs - get then write drive taskfile settings
Tejun Heo67465442007-05-15 03:28:16 +0900750 * @dev: target ATA device
Martin Olsson98a17082009-04-22 18:21:29 +0200751 * @nr_executed: out parameter for the number of executed commands
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700752 *
Martin Olsson98a17082009-04-22 18:21:29 +0200753 * Evaluate _GTF and execute returned taskfiles.
Tejun Heo69b16a52007-05-15 03:28:16 +0900754 *
755 * LOCKING:
756 * EH context.
757 *
758 * RETURNS:
Tejun Heo66fa7f22007-12-15 15:05:04 +0900759 * Number of executed taskfiles on success, 0 if _GTF doesn't exist.
760 * -errno on other errors.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700761 */
Tejun Heo66fa7f22007-12-15 15:05:04 +0900762static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700763{
Tejun Heo3264a8d2007-12-15 15:05:06 +0900764 struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL;
Tejun Heo67465442007-05-15 03:28:16 +0900765 int gtf_count, i, rc;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700766
Tejun Heo67465442007-05-15 03:28:16 +0900767 /* get taskfiles */
Tejun Heo66fa7f22007-12-15 15:05:04 +0900768 rc = ata_dev_get_GTF(dev, &gtf);
769 if (rc < 0)
770 return rc;
771 gtf_count = rc;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700772
Tejun Heo67465442007-05-15 03:28:16 +0900773 /* execute them */
Tejun Heo3264a8d2007-12-15 15:05:06 +0900774 for (i = 0; i < gtf_count; i++, gtf++) {
775 rc = ata_acpi_run_tf(dev, gtf, pgtf);
Tejun Heo0e8634b2007-12-15 15:05:05 +0900776 if (rc < 0)
777 break;
Tejun Heo3264a8d2007-12-15 15:05:06 +0900778 if (rc) {
Tejun Heo0e8634b2007-12-15 15:05:05 +0900779 (*nr_executed)++;
Tejun Heo3264a8d2007-12-15 15:05:06 +0900780 pgtf = gtf;
781 }
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700782 }
783
Tejun Heo398e0782007-12-15 15:05:03 +0900784 ata_acpi_clear_gtf(dev);
Tejun Heo67465442007-05-15 03:28:16 +0900785
Tejun Heo0e8634b2007-12-15 15:05:05 +0900786 if (rc < 0)
787 return rc;
788 return 0;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700789}
790
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700791/**
792 * ata_acpi_push_id - send Identify data to drive
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900793 * @dev: target ATA device
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700794 *
795 * _SDD ACPI object: for SATA mode only
796 * Must be after Identify (Packet) Device -- uses its data
797 * ATM this function never returns a failure. It is an optional
798 * method and if it fails for whatever reason, we should still
799 * just keep going.
Tejun Heo69b16a52007-05-15 03:28:16 +0900800 *
801 * LOCKING:
802 * EH context.
803 *
804 * RETURNS:
Tejun Heof2406772009-11-18 22:24:21 +0900805 * 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure.
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700806 */
Tejun Heo67465442007-05-15 03:28:16 +0900807static int ata_acpi_push_id(struct ata_device *dev)
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700808{
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900809 struct ata_port *ap = dev->link->ap;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900810 acpi_status status;
811 struct acpi_object_list input;
812 union acpi_object in_params[1];
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700813
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700814 if (ata_msg_probe(ap))
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900815 ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n",
Harvey Harrison7f5e4e82008-03-05 18:24:52 -0800816 __func__, dev->devno, ap->port_no);
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700817
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700818 /* Give the drive Identify data to the drive via the _SDD method */
819 /* _SDD: set up input parameters */
820 input.count = 1;
821 input.pointer = in_params;
822 in_params[0].type = ACPI_TYPE_BUFFER;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900823 in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS;
824 in_params[0].buffer.pointer = (u8 *)dev->id;
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700825 /* Output buffer: _SDD has no output */
826
827 /* It's OK for _SDD to be missing too. */
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900828 swap_buf_le16(dev->id, ATA_ID_WORDS);
Tejun Heofafbae82007-05-15 03:28:16 +0900829 status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL);
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900830 swap_buf_le16(dev->id, ATA_ID_WORDS);
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700831
Tejun Heof2406772009-11-18 22:24:21 +0900832 if (status == AE_NOT_FOUND)
833 return -ENOENT;
834
835 if (ACPI_FAILURE(status)) {
Tejun Heo69b16a52007-05-15 03:28:16 +0900836 ata_dev_printk(dev, KERN_WARNING,
837 "ACPI _SDD failed (AE 0x%x)\n", status);
Tejun Heof2406772009-11-18 22:24:21 +0900838 return -EIO;
839 }
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700840
Tejun Heof2406772009-11-18 22:24:21 +0900841 return 0;
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700842}
843
Tejun Heo67465442007-05-15 03:28:16 +0900844/**
Tejun Heo64578a32007-05-15 03:28:16 +0900845 * ata_acpi_on_suspend - ATA ACPI hook called on suspend
846 * @ap: target ATA port
847 *
848 * This function is called when @ap is about to be suspended. All
849 * devices are already put to sleep but the port_suspend() callback
850 * hasn't been executed yet. Error return from this function aborts
851 * suspend.
852 *
853 * LOCKING:
854 * EH context.
855 *
856 * RETURNS:
857 * 0 on success, -errno on failure.
858 */
859int ata_acpi_on_suspend(struct ata_port *ap)
860{
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900861 /* nada */
862 return 0;
Tejun Heo64578a32007-05-15 03:28:16 +0900863}
864
865/**
Tejun Heo67465442007-05-15 03:28:16 +0900866 * ata_acpi_on_resume - ATA ACPI hook called on resume
867 * @ap: target ATA port
868 *
869 * This function is called when @ap is resumed - right after port
870 * itself is resumed but before any EH action is taken.
871 *
872 * LOCKING:
873 * EH context.
874 */
875void ata_acpi_on_resume(struct ata_port *ap)
876{
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900877 const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
Tejun Heof58229f2007-08-06 18:36:23 +0900878 struct ata_device *dev;
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700879
Tejun Heo398e0782007-12-15 15:05:03 +0900880 if (ap->acpi_handle && gtm) {
881 /* _GTM valid */
882
883 /* restore timing parameters */
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900884 ata_acpi_stm(ap, gtm);
Tejun Heo64578a32007-05-15 03:28:16 +0900885
Tejun Heo398e0782007-12-15 15:05:03 +0900886 /* _GTF should immediately follow _STM so that it can
887 * use values set by _STM. Cache _GTF result and
888 * schedule _GTF.
889 */
Tejun Heo1eca4362008-11-03 20:03:17 +0900890 ata_for_each_dev(dev, &ap->link, ALL) {
Tejun Heo398e0782007-12-15 15:05:03 +0900891 ata_acpi_clear_gtf(dev);
Shaohua Li48feb3c2008-03-25 16:50:45 +0800892 if (ata_dev_enabled(dev) &&
893 ata_dev_get_GTF(dev, NULL) >= 0)
Tejun Heo398e0782007-12-15 15:05:03 +0900894 dev->flags |= ATA_DFLAG_ACPI_PENDING;
895 }
896 } else {
897 /* SATA _GTF needs to be evaulated after _SDD and
898 * there's no reason to evaluate IDE _GTF early
899 * without _STM. Clear cache and schedule _GTF.
900 */
Tejun Heo1eca4362008-11-03 20:03:17 +0900901 ata_for_each_dev(dev, &ap->link, ALL) {
Tejun Heo398e0782007-12-15 15:05:03 +0900902 ata_acpi_clear_gtf(dev);
Shaohua Li48feb3c2008-03-25 16:50:45 +0800903 if (ata_dev_enabled(dev))
904 dev->flags |= ATA_DFLAG_ACPI_PENDING;
Tejun Heo398e0782007-12-15 15:05:03 +0900905 }
906 }
Tejun Heo67465442007-05-15 03:28:16 +0900907}
908
909/**
Shaohua Libd3adca2007-11-02 09:32:38 +0800910 * ata_acpi_set_state - set the port power state
911 * @ap: target ATA port
912 * @state: state, on/off
913 *
914 * This function executes the _PS0/_PS3 ACPI method to set the power state.
915 * ACPI spec requires _PS0 when IDE power on and _PS3 when power off
916 */
917void ata_acpi_set_state(struct ata_port *ap, pm_message_t state)
918{
919 struct ata_device *dev;
920
921 if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA))
922 return;
923
924 /* channel first and then drives for power on and vica versa
925 for power off */
926 if (state.event == PM_EVENT_ON)
927 acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0);
928
Tejun Heo1eca4362008-11-03 20:03:17 +0900929 ata_for_each_dev(dev, &ap->link, ENABLED) {
930 if (dev->acpi_handle)
Shaohua Libd3adca2007-11-02 09:32:38 +0800931 acpi_bus_set_power(dev->acpi_handle,
932 state.event == PM_EVENT_ON ?
933 ACPI_STATE_D0 : ACPI_STATE_D3);
934 }
935 if (state.event != PM_EVENT_ON)
936 acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3);
937}
938
939/**
Tejun Heo67465442007-05-15 03:28:16 +0900940 * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration
941 * @dev: target ATA device
942 *
943 * This function is called when @dev is about to be configured.
944 * IDENTIFY data might have been modified after this hook is run.
945 *
946 * LOCKING:
947 * EH context.
948 *
949 * RETURNS:
950 * Positive number if IDENTIFY data needs to be refreshed, 0 if not,
951 * -errno on failure.
952 */
953int ata_acpi_on_devcfg(struct ata_device *dev)
954{
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900955 struct ata_port *ap = dev->link->ap;
956 struct ata_eh_context *ehc = &ap->link.eh_context;
Tejun Heo67465442007-05-15 03:28:16 +0900957 int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA;
Tejun Heo66fa7f22007-12-15 15:05:04 +0900958 int nr_executed = 0;
Tejun Heo67465442007-05-15 03:28:16 +0900959 int rc;
960
Tejun Heo67465442007-05-15 03:28:16 +0900961 if (!dev->acpi_handle)
962 return 0;
963
964 /* do we need to do _GTF? */
965 if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) &&
966 !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET)))
967 return 0;
968
969 /* do _SDD if SATA */
970 if (acpi_sata) {
971 rc = ata_acpi_push_id(dev);
Tejun Heof2406772009-11-18 22:24:21 +0900972 if (rc && rc != -ENOENT)
Tejun Heo67465442007-05-15 03:28:16 +0900973 goto acpi_err;
974 }
975
976 /* do _GTF */
Tejun Heo66fa7f22007-12-15 15:05:04 +0900977 rc = ata_acpi_exec_tfs(dev, &nr_executed);
978 if (rc)
Tejun Heo67465442007-05-15 03:28:16 +0900979 goto acpi_err;
980
981 dev->flags &= ~ATA_DFLAG_ACPI_PENDING;
982
983 /* refresh IDENTIFY page if any _GTF command has been executed */
Tejun Heo66fa7f22007-12-15 15:05:04 +0900984 if (nr_executed) {
Tejun Heo67465442007-05-15 03:28:16 +0900985 rc = ata_dev_reread_id(dev, 0);
986 if (rc < 0) {
987 ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY "
988 "after ACPI commands\n");
989 return rc;
990 }
991 }
992
993 return 0;
994
995 acpi_err:
Tejun Heo66fa7f22007-12-15 15:05:04 +0900996 /* ignore evaluation failure if we can continue safely */
997 if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
998 return 0;
Tejun Heo67465442007-05-15 03:28:16 +0900999
Tejun Heo66fa7f22007-12-15 15:05:04 +09001000 /* fail and let EH retry once more for unknown IO errors */
1001 if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) {
1002 dev->flags |= ATA_DFLAG_ACPI_FAILED;
1003 return rc;
Tejun Heo67465442007-05-15 03:28:16 +09001004 }
Tejun Heo66fa7f22007-12-15 15:05:04 +09001005
1006 ata_dev_printk(dev, KERN_WARNING,
1007 "ACPI: failed the second time, disabled\n");
1008 dev->acpi_handle = NULL;
1009
1010 /* We can safely continue if no _GTF command has been executed
1011 * and port is not frozen.
1012 */
1013 if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
1014 return 0;
1015
Tejun Heo67465442007-05-15 03:28:16 +09001016 return rc;
1017}
Tejun Heo562f0c22007-12-15 15:05:01 +09001018
1019/**
1020 * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled
1021 * @dev: target ATA device
1022 *
1023 * This function is called when @dev is about to be disabled.
1024 *
1025 * LOCKING:
1026 * EH context.
1027 */
1028void ata_acpi_on_disable(struct ata_device *dev)
1029{
Tejun Heo398e0782007-12-15 15:05:03 +09001030 ata_acpi_clear_gtf(dev);
Tejun Heo562f0c22007-12-15 15:05:01 +09001031}