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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>
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
Vasiliy Kulikov9c8b04b2011-06-25 21:07:52 +0400221static const struct acpi_dock_ops ata_acpi_dev_dock_ops = {
Shaohua Li1253f7a2008-08-28 10:06:16 +0800222 .handler = ata_acpi_dev_notify_dock,
223 .uevent = ata_acpi_dev_uevent,
224};
225
Vasiliy Kulikov9c8b04b2011-06-25 21:07:52 +0400226static const struct acpi_dock_ops ata_acpi_ap_dock_ops = {
Shaohua Li1253f7a2008-08-28 10:06:16 +0800227 .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)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -0700335 ata_port_err(ap, "ACPI get timing mode failed (AE 0x%x)\n",
336 status);
Tejun Heo64578a32007-05-15 03:28:16 +0900337 goto out_free;
338 }
339
340 out_obj = output.pointer;
341 if (out_obj->type != ACPI_TYPE_BUFFER) {
Joe Perchesa9a79df2011-04-15 15:51:59 -0700342 ata_port_warn(ap, "_GTM returned unexpected object type 0x%x\n",
343 out_obj->type);
Tejun Heo64578a32007-05-15 03:28:16 +0900344
345 goto out_free;
346 }
347
348 if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -0700349 ata_port_err(ap, "_GTM returned invalid length %d\n",
350 out_obj->buffer.length);
Tejun Heo64578a32007-05-15 03:28:16 +0900351 goto out_free;
352 }
353
354 memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm));
355 rc = 0;
356 out_free:
357 kfree(output.pointer);
358 return rc;
359}
360
Alan Coxbadff032007-10-04 21:28:18 +0100361EXPORT_SYMBOL_GPL(ata_acpi_gtm);
362
Tejun Heo64578a32007-05-15 03:28:16 +0900363/**
364 * ata_acpi_stm - execute _STM
365 * @ap: target ATA port
366 * @stm: timing parameter to _STM
367 *
368 * Evaluate _STM with timing parameter @stm.
369 *
370 * LOCKING:
371 * EH context.
372 *
373 * RETURNS:
374 * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure.
375 */
Tejun Heo0d02f0b2007-12-15 15:04:57 +0900376int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm)
Tejun Heo64578a32007-05-15 03:28:16 +0900377{
378 acpi_status status;
Tejun Heo0d02f0b2007-12-15 15:04:57 +0900379 struct ata_acpi_gtm stm_buf = *stm;
Tejun Heo64578a32007-05-15 03:28:16 +0900380 struct acpi_object_list input;
381 union acpi_object in_params[3];
382
383 in_params[0].type = ACPI_TYPE_BUFFER;
384 in_params[0].buffer.length = sizeof(struct ata_acpi_gtm);
Tejun Heo0d02f0b2007-12-15 15:04:57 +0900385 in_params[0].buffer.pointer = (u8 *)&stm_buf;
Tejun Heo64578a32007-05-15 03:28:16 +0900386 /* Buffers for id may need byteswapping ? */
387 in_params[1].type = ACPI_TYPE_BUFFER;
388 in_params[1].buffer.length = 512;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900389 in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id;
Tejun Heo64578a32007-05-15 03:28:16 +0900390 in_params[2].type = ACPI_TYPE_BUFFER;
391 in_params[2].buffer.length = 512;
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900392 in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id;
Tejun Heo64578a32007-05-15 03:28:16 +0900393
394 input.count = 3;
395 input.pointer = in_params;
396
397 status = acpi_evaluate_object(ap->acpi_handle, "_STM", &input, NULL);
398
399 if (status == AE_NOT_FOUND)
400 return -ENOENT;
401 if (ACPI_FAILURE(status)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -0700402 ata_port_err(ap, "ACPI set timing mode failed (status=0x%x)\n",
403 status);
Tejun Heo64578a32007-05-15 03:28:16 +0900404 return -EINVAL;
405 }
406 return 0;
407}
408
Alan Coxbadff032007-10-04 21:28:18 +0100409EXPORT_SYMBOL_GPL(ata_acpi_stm);
410
Tejun Heo64578a32007-05-15 03:28:16 +0900411/**
Tejun Heo4700c4b2007-05-15 03:28:16 +0900412 * ata_dev_get_GTF - get the drive bootup default taskfile settings
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900413 * @dev: target ATA device
Tejun Heo4700c4b2007-05-15 03:28:16 +0900414 * @gtf: output parameter for buffer containing _GTF taskfile arrays
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700415 *
416 * This applies to both PATA and SATA drives.
417 *
418 * The _GTF method has no input parameters.
419 * It returns a variable number of register set values (registers
420 * hex 1F1..1F7, taskfiles).
421 * The <variable number> is not known in advance, so have ACPI-CA
422 * allocate the buffer as needed and return it, then free it later.
423 *
Tejun Heo4700c4b2007-05-15 03:28:16 +0900424 * LOCKING:
425 * EH context.
426 *
427 * RETURNS:
Tejun Heo66fa7f22007-12-15 15:05:04 +0900428 * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL
429 * if _GTF is invalid.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700430 */
Tejun Heo398e0782007-12-15 15:05:03 +0900431static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700432{
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900433 struct ata_port *ap = dev->link->ap;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900434 acpi_status status;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900435 struct acpi_buffer output;
436 union acpi_object *out_obj;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900437 int rc = 0;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700438
Tejun Heo398e0782007-12-15 15:05:03 +0900439 /* if _GTF is cached, use the cached value */
440 if (dev->gtf_cache) {
441 out_obj = dev->gtf_cache;
442 goto done;
443 }
444
Tejun Heo4700c4b2007-05-15 03:28:16 +0900445 /* set up output buffer */
446 output.length = ACPI_ALLOCATE_BUFFER;
447 output.pointer = NULL; /* ACPI-CA sets this; save/free it later */
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700448
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700449 if (ata_msg_probe(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -0700450 ata_dev_dbg(dev, "%s: ENTER: port#: %d\n",
451 __func__, ap->port_no);
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700452
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700453 /* _GTF has no input parameters */
Tejun Heo4700c4b2007-05-15 03:28:16 +0900454 status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output);
Tejun Heo398e0782007-12-15 15:05:03 +0900455 out_obj = dev->gtf_cache = output.pointer;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900456
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700457 if (ACPI_FAILURE(status)) {
Tejun Heo4700c4b2007-05-15 03:28:16 +0900458 if (status != AE_NOT_FOUND) {
Joe Perchesa9a79df2011-04-15 15:51:59 -0700459 ata_dev_warn(dev, "_GTF evaluation failed (AE 0x%x)\n",
460 status);
Tejun Heo66fa7f22007-12-15 15:05:04 +0900461 rc = -EINVAL;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900462 }
463 goto out_free;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700464 }
465
466 if (!output.length || !output.pointer) {
467 if (ata_msg_probe(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -0700468 ata_dev_dbg(dev, "%s: Run _GTF: length or ptr is NULL (0x%llx, 0x%p)\n",
469 __func__,
470 (unsigned long long)output.length,
471 output.pointer);
Tejun Heo66fa7f22007-12-15 15:05:04 +0900472 rc = -EINVAL;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900473 goto out_free;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700474 }
475
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700476 if (out_obj->type != ACPI_TYPE_BUFFER) {
Joe Perchesa9a79df2011-04-15 15:51:59 -0700477 ata_dev_warn(dev, "_GTF unexpected object type 0x%x\n",
478 out_obj->type);
Tejun Heo66fa7f22007-12-15 15:05:04 +0900479 rc = -EINVAL;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900480 goto out_free;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700481 }
482
Tejun Heo4700c4b2007-05-15 03:28:16 +0900483 if (out_obj->buffer.length % REGS_PER_GTF) {
Joe Perchesa9a79df2011-04-15 15:51:59 -0700484 ata_dev_warn(dev, "unexpected _GTF length (%d)\n",
485 out_obj->buffer.length);
Tejun Heo66fa7f22007-12-15 15:05:04 +0900486 rc = -EINVAL;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900487 goto out_free;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700488 }
489
Tejun Heo398e0782007-12-15 15:05:03 +0900490 done:
Tejun Heo4700c4b2007-05-15 03:28:16 +0900491 rc = out_obj->buffer.length / REGS_PER_GTF;
Tejun Heo398e0782007-12-15 15:05:03 +0900492 if (gtf) {
493 *gtf = (void *)out_obj->buffer.pointer;
494 if (ata_msg_probe(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -0700495 ata_dev_dbg(dev, "%s: returning gtf=%p, gtf_count=%d\n",
496 __func__, *gtf, rc);
Tejun Heo398e0782007-12-15 15:05:03 +0900497 }
Tejun Heo4700c4b2007-05-15 03:28:16 +0900498 return rc;
499
500 out_free:
Tejun Heo398e0782007-12-15 15:05:03 +0900501 ata_acpi_clear_gtf(dev);
Tejun Heo4700c4b2007-05-15 03:28:16 +0900502 return rc;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700503}
504
Tejun Heo7c77fa42007-12-18 16:33:03 +0900505/**
506 * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter
507 * @dev: target device
508 * @gtm: GTM parameter to use
509 *
510 * Determine xfermask for @dev from @gtm.
511 *
512 * LOCKING:
513 * None.
514 *
515 * RETURNS:
516 * Determined xfermask.
517 */
518unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
519 const struct ata_acpi_gtm *gtm)
520{
Tejun Heoa0f79b92007-12-18 16:33:05 +0900521 unsigned long xfer_mask = 0;
522 unsigned int type;
523 int unit;
524 u8 mode;
Tejun Heo7c77fa42007-12-18 16:33:03 +0900525
526 /* we always use the 0 slot for crap hardware */
527 unit = dev->devno;
528 if (!(gtm->flags & 0x10))
529 unit = 0;
530
Tejun Heoa0f79b92007-12-18 16:33:05 +0900531 /* PIO */
532 mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio);
533 xfer_mask |= ata_xfer_mode2mask(mode);
Tejun Heo7c77fa42007-12-18 16:33:03 +0900534
535 /* See if we have MWDMA or UDMA data. We don't bother with
536 * MWDMA if UDMA is available as this means the BIOS set UDMA
537 * and our error changedown if it works is UDMA to PIO anyway.
538 */
Tejun Heoa0f79b92007-12-18 16:33:05 +0900539 if (!(gtm->flags & (1 << (2 * unit))))
540 type = ATA_SHIFT_MWDMA;
541 else
542 type = ATA_SHIFT_UDMA;
Tejun Heo7c77fa42007-12-18 16:33:03 +0900543
Tejun Heoa0f79b92007-12-18 16:33:05 +0900544 mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma);
545 xfer_mask |= ata_xfer_mode2mask(mode);
546
547 return xfer_mask;
Tejun Heo7c77fa42007-12-18 16:33:03 +0900548}
549EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask);
550
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700551/**
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400552 * ata_acpi_cbl_80wire - Check for 80 wire cable
553 * @ap: Port to check
Tejun Heo021ee9a2007-12-18 16:33:06 +0900554 * @gtm: GTM data to use
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400555 *
Tejun Heo021ee9a2007-12-18 16:33:06 +0900556 * Return 1 if the @gtm indicates the BIOS selected an 80wire mode.
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400557 */
Tejun Heo021ee9a2007-12-18 16:33:06 +0900558int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm)
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400559{
Tejun Heo021ee9a2007-12-18 16:33:06 +0900560 struct ata_device *dev;
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400561
Tejun Heo1eca4362008-11-03 20:03:17 +0900562 ata_for_each_dev(dev, &ap->link, ENABLED) {
Tejun Heo021ee9a2007-12-18 16:33:06 +0900563 unsigned long xfer_mask, udma_mask;
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400564
Tejun Heo021ee9a2007-12-18 16:33:06 +0900565 xfer_mask = ata_acpi_gtm_xfermask(dev, gtm);
566 ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask);
567
568 if (udma_mask & ~ATA_UDMA_MASK_40C)
569 return 1;
570 }
571
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400572 return 0;
573}
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400574EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire);
575
Tejun Heo3264a8d2007-12-15 15:05:06 +0900576static void ata_acpi_gtf_to_tf(struct ata_device *dev,
577 const struct ata_acpi_gtf *gtf,
578 struct ata_taskfile *tf)
579{
580 ata_tf_init(dev, tf);
581
582 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
583 tf->protocol = ATA_PROT_NODATA;
584 tf->feature = gtf->tf[0]; /* 0x1f1 */
585 tf->nsect = gtf->tf[1]; /* 0x1f2 */
586 tf->lbal = gtf->tf[2]; /* 0x1f3 */
587 tf->lbam = gtf->tf[3]; /* 0x1f4 */
588 tf->lbah = gtf->tf[4]; /* 0x1f5 */
589 tf->device = gtf->tf[5]; /* 0x1f6 */
590 tf->command = gtf->tf[6]; /* 0x1f7 */
591}
592
Tejun Heo110f66d2009-09-16 04:17:28 +0900593static int ata_acpi_filter_tf(struct ata_device *dev,
594 const struct ata_taskfile *tf,
Tejun Heo3264a8d2007-12-15 15:05:06 +0900595 const struct ata_taskfile *ptf)
596{
Tejun Heo110f66d2009-09-16 04:17:28 +0900597 if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) {
Tejun Heo3264a8d2007-12-15 15:05:06 +0900598 /* libata doesn't use ACPI to configure transfer mode.
599 * It will only confuse device configuration. Skip.
600 */
601 if (tf->command == ATA_CMD_SET_FEATURES &&
602 tf->feature == SETFEATURES_XFER)
603 return 1;
604 }
605
Tejun Heo110f66d2009-09-16 04:17:28 +0900606 if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) {
Tejun Heo3264a8d2007-12-15 15:05:06 +0900607 /* BIOS writers, sorry but we don't wanna lock
608 * features unless the user explicitly said so.
609 */
610
611 /* DEVICE CONFIGURATION FREEZE LOCK */
612 if (tf->command == ATA_CMD_CONF_OVERLAY &&
613 tf->feature == ATA_DCO_FREEZE_LOCK)
614 return 1;
615
616 /* SECURITY FREEZE LOCK */
617 if (tf->command == ATA_CMD_SEC_FREEZE_LOCK)
618 return 1;
619
620 /* SET MAX LOCK and SET MAX FREEZE LOCK */
621 if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) &&
622 tf->command == ATA_CMD_SET_MAX &&
623 (tf->feature == ATA_SET_MAX_LOCK ||
624 tf->feature == ATA_SET_MAX_FREEZE_LOCK))
625 return 1;
626 }
627
Tejun Heofa5b5612009-09-16 04:17:02 +0900628 if (tf->command == ATA_CMD_SET_FEATURES &&
629 tf->feature == SETFEATURES_SATA_ENABLE) {
Tejun Heob3449912008-07-06 23:15:03 +0900630 /* inhibit enabling DIPM */
Tejun Heo110f66d2009-09-16 04:17:28 +0900631 if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM &&
Tejun Heob3449912008-07-06 23:15:03 +0900632 tf->nsect == SATA_DIPM)
633 return 1;
Tejun Heofa5b5612009-09-16 04:17:02 +0900634
635 /* inhibit FPDMA non-zero offset */
Tejun Heo110f66d2009-09-16 04:17:28 +0900636 if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET &&
Tejun Heofa5b5612009-09-16 04:17:02 +0900637 (tf->nsect == SATA_FPDMA_OFFSET ||
638 tf->nsect == SATA_FPDMA_IN_ORDER))
639 return 1;
640
641 /* inhibit FPDMA auto activation */
Tejun Heo110f66d2009-09-16 04:17:28 +0900642 if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA &&
Tejun Heofa5b5612009-09-16 04:17:02 +0900643 tf->nsect == SATA_FPDMA_AA)
644 return 1;
Tejun Heob3449912008-07-06 23:15:03 +0900645 }
646
Tejun Heo3264a8d2007-12-15 15:05:06 +0900647 return 0;
648}
649
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400650/**
Tejun Heo0e8634b2007-12-15 15:05:05 +0900651 * ata_acpi_run_tf - send taskfile registers to host controller
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900652 * @dev: target ATA device
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700653 * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7)
654 *
Sergei Shtylyov3696df32011-02-04 22:04:17 +0300655 * Outputs ATA taskfile to standard ATA host controller.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700656 * Writes the control, feature, nsect, lbal, lbam, and lbah registers.
657 * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
658 * hob_lbal, hob_lbam, and hob_lbah.
659 *
660 * This function waits for idle (!BUSY and !DRQ) after writing
661 * registers. If the control register has a new value, this
662 * function also waits for idle after writing control and before
663 * writing the remaining registers.
664 *
Tejun Heo4700c4b2007-05-15 03:28:16 +0900665 * LOCKING:
666 * EH context.
667 *
668 * RETURNS:
Tejun Heo3264a8d2007-12-15 15:05:06 +0900669 * 1 if command is executed successfully. 0 if ignored, rejected or
670 * filtered out, -errno on other errors.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700671 */
Tejun Heo0e8634b2007-12-15 15:05:05 +0900672static int ata_acpi_run_tf(struct ata_device *dev,
Tejun Heo3264a8d2007-12-15 15:05:06 +0900673 const struct ata_acpi_gtf *gtf,
674 const struct ata_acpi_gtf *prev_gtf)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700675{
Tejun Heo3264a8d2007-12-15 15:05:06 +0900676 struct ata_taskfile *pptf = NULL;
677 struct ata_taskfile tf, ptf, rtf;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900678 unsigned int err_mask;
Tejun Heo0e8634b2007-12-15 15:05:05 +0900679 const char *level;
Robert Hancock65211482009-07-14 20:43:39 -0600680 const char *descr;
Tejun Heo0e8634b2007-12-15 15:05:05 +0900681 char msg[60];
682 int rc;
Jeff Garzikfc16c252007-02-24 21:05:01 -0500683
Tejun Heo4700c4b2007-05-15 03:28:16 +0900684 if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0)
685 && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0)
686 && (gtf->tf[6] == 0))
687 return 0;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700688
Tejun Heo3264a8d2007-12-15 15:05:06 +0900689 ata_acpi_gtf_to_tf(dev, gtf, &tf);
690 if (prev_gtf) {
691 ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf);
692 pptf = &ptf;
693 }
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700694
Tejun Heo110f66d2009-09-16 04:17:28 +0900695 if (!ata_acpi_filter_tf(dev, &tf, pptf)) {
Tejun Heo3264a8d2007-12-15 15:05:06 +0900696 rtf = tf;
697 err_mask = ata_exec_internal(dev, &rtf, NULL,
698 DMA_NONE, NULL, 0, 0);
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700699
Tejun Heo3264a8d2007-12-15 15:05:06 +0900700 switch (err_mask) {
701 case 0:
702 level = KERN_DEBUG;
703 snprintf(msg, sizeof(msg), "succeeded");
704 rc = 1;
705 break;
Tejun Heo0e8634b2007-12-15 15:05:05 +0900706
Tejun Heo3264a8d2007-12-15 15:05:06 +0900707 case AC_ERR_DEV:
708 level = KERN_INFO;
709 snprintf(msg, sizeof(msg),
710 "rejected by device (Stat=0x%02x Err=0x%02x)",
711 rtf.command, rtf.feature);
712 rc = 0;
713 break;
Tejun Heo0e8634b2007-12-15 15:05:05 +0900714
Tejun Heo3264a8d2007-12-15 15:05:06 +0900715 default:
716 level = KERN_ERR;
717 snprintf(msg, sizeof(msg),
718 "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)",
719 err_mask, rtf.command, rtf.feature);
720 rc = -EIO;
721 break;
722 }
723 } else {
Tejun Heo0e8634b2007-12-15 15:05:05 +0900724 level = KERN_INFO;
Tejun Heo3264a8d2007-12-15 15:05:06 +0900725 snprintf(msg, sizeof(msg), "filtered out");
Tejun Heo0e8634b2007-12-15 15:05:05 +0900726 rc = 0;
Tejun Heo4700c4b2007-05-15 03:28:16 +0900727 }
Robert Hancock65211482009-07-14 20:43:39 -0600728 descr = ata_get_cmd_descript(tf.command);
Tejun Heo4700c4b2007-05-15 03:28:16 +0900729
Tejun Heo0e8634b2007-12-15 15:05:05 +0900730 ata_dev_printk(dev, level,
Robert Hancock65211482009-07-14 20:43:39 -0600731 "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n",
Tejun Heo0e8634b2007-12-15 15:05:05 +0900732 tf.command, tf.feature, tf.nsect, tf.lbal,
Robert Hancock65211482009-07-14 20:43:39 -0600733 tf.lbam, tf.lbah, tf.device,
734 (descr ? descr : "unknown"), msg);
Tejun Heo0e8634b2007-12-15 15:05:05 +0900735
736 return rc;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700737}
738
739/**
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700740 * ata_acpi_exec_tfs - get then write drive taskfile settings
Tejun Heo67465442007-05-15 03:28:16 +0900741 * @dev: target ATA device
Martin Olsson98a17082009-04-22 18:21:29 +0200742 * @nr_executed: out parameter for the number of executed commands
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700743 *
Martin Olsson98a17082009-04-22 18:21:29 +0200744 * Evaluate _GTF and execute returned taskfiles.
Tejun Heo69b16a52007-05-15 03:28:16 +0900745 *
746 * LOCKING:
747 * EH context.
748 *
749 * RETURNS:
Tejun Heo66fa7f22007-12-15 15:05:04 +0900750 * Number of executed taskfiles on success, 0 if _GTF doesn't exist.
751 * -errno on other errors.
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700752 */
Tejun Heo66fa7f22007-12-15 15:05:04 +0900753static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed)
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700754{
Tejun Heo3264a8d2007-12-15 15:05:06 +0900755 struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL;
Tejun Heo67465442007-05-15 03:28:16 +0900756 int gtf_count, i, rc;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700757
Tejun Heo67465442007-05-15 03:28:16 +0900758 /* get taskfiles */
Tejun Heo66fa7f22007-12-15 15:05:04 +0900759 rc = ata_dev_get_GTF(dev, &gtf);
760 if (rc < 0)
761 return rc;
762 gtf_count = rc;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700763
Tejun Heo67465442007-05-15 03:28:16 +0900764 /* execute them */
Tejun Heo3264a8d2007-12-15 15:05:06 +0900765 for (i = 0; i < gtf_count; i++, gtf++) {
766 rc = ata_acpi_run_tf(dev, gtf, pgtf);
Tejun Heo0e8634b2007-12-15 15:05:05 +0900767 if (rc < 0)
768 break;
Tejun Heo3264a8d2007-12-15 15:05:06 +0900769 if (rc) {
Tejun Heo0e8634b2007-12-15 15:05:05 +0900770 (*nr_executed)++;
Tejun Heo3264a8d2007-12-15 15:05:06 +0900771 pgtf = gtf;
772 }
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700773 }
774
Tejun Heo398e0782007-12-15 15:05:03 +0900775 ata_acpi_clear_gtf(dev);
Tejun Heo67465442007-05-15 03:28:16 +0900776
Tejun Heo0e8634b2007-12-15 15:05:05 +0900777 if (rc < 0)
778 return rc;
779 return 0;
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700780}
781
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700782/**
783 * ata_acpi_push_id - send Identify data to drive
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900784 * @dev: target ATA device
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700785 *
786 * _SDD ACPI object: for SATA mode only
787 * Must be after Identify (Packet) Device -- uses its data
788 * ATM this function never returns a failure. It is an optional
789 * method and if it fails for whatever reason, we should still
790 * just keep going.
Tejun Heo69b16a52007-05-15 03:28:16 +0900791 *
792 * LOCKING:
793 * EH context.
794 *
795 * RETURNS:
Tejun Heof2406772009-11-18 22:24:21 +0900796 * 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure.
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700797 */
Tejun Heo67465442007-05-15 03:28:16 +0900798static int ata_acpi_push_id(struct ata_device *dev)
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700799{
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900800 struct ata_port *ap = dev->link->ap;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900801 acpi_status status;
802 struct acpi_object_list input;
803 union acpi_object in_params[1];
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700804
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700805 if (ata_msg_probe(ap))
Joe Perchesa9a79df2011-04-15 15:51:59 -0700806 ata_dev_dbg(dev, "%s: ix = %d, port#: %d\n",
807 __func__, dev->devno, ap->port_no);
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700808
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700809 /* Give the drive Identify data to the drive via the _SDD method */
810 /* _SDD: set up input parameters */
811 input.count = 1;
812 input.pointer = in_params;
813 in_params[0].type = ACPI_TYPE_BUFFER;
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900814 in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS;
815 in_params[0].buffer.pointer = (u8 *)dev->id;
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700816 /* Output buffer: _SDD has no output */
817
818 /* It's OK for _SDD to be missing too. */
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900819 swap_buf_le16(dev->id, ATA_ID_WORDS);
Tejun Heofafbae82007-05-15 03:28:16 +0900820 status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL);
Tejun Heo3a32a8e2007-05-05 23:50:38 +0900821 swap_buf_le16(dev->id, ATA_ID_WORDS);
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700822
Tejun Heof2406772009-11-18 22:24:21 +0900823 if (status == AE_NOT_FOUND)
824 return -ENOENT;
825
826 if (ACPI_FAILURE(status)) {
Joe Perchesa9a79df2011-04-15 15:51:59 -0700827 ata_dev_warn(dev, "ACPI _SDD failed (AE 0x%x)\n", status);
Tejun Heof2406772009-11-18 22:24:21 +0900828 return -EIO;
829 }
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700830
Tejun Heof2406772009-11-18 22:24:21 +0900831 return 0;
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700832}
833
Tejun Heo67465442007-05-15 03:28:16 +0900834/**
Tejun Heo64578a32007-05-15 03:28:16 +0900835 * ata_acpi_on_suspend - ATA ACPI hook called on suspend
836 * @ap: target ATA port
837 *
838 * This function is called when @ap is about to be suspended. All
839 * devices are already put to sleep but the port_suspend() callback
840 * hasn't been executed yet. Error return from this function aborts
841 * suspend.
842 *
843 * LOCKING:
844 * EH context.
845 *
846 * RETURNS:
847 * 0 on success, -errno on failure.
848 */
849int ata_acpi_on_suspend(struct ata_port *ap)
850{
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900851 /* nada */
852 return 0;
Tejun Heo64578a32007-05-15 03:28:16 +0900853}
854
855/**
Tejun Heo67465442007-05-15 03:28:16 +0900856 * ata_acpi_on_resume - ATA ACPI hook called on resume
857 * @ap: target ATA port
858 *
859 * This function is called when @ap is resumed - right after port
860 * itself is resumed but before any EH action is taken.
861 *
862 * LOCKING:
863 * EH context.
864 */
865void ata_acpi_on_resume(struct ata_port *ap)
866{
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900867 const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
Tejun Heof58229f2007-08-06 18:36:23 +0900868 struct ata_device *dev;
Kristen Carlson Accardi7ea1fbc2006-09-28 11:29:12 -0700869
Tejun Heo398e0782007-12-15 15:05:03 +0900870 if (ap->acpi_handle && gtm) {
871 /* _GTM valid */
872
873 /* restore timing parameters */
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900874 ata_acpi_stm(ap, gtm);
Tejun Heo64578a32007-05-15 03:28:16 +0900875
Tejun Heo398e0782007-12-15 15:05:03 +0900876 /* _GTF should immediately follow _STM so that it can
877 * use values set by _STM. Cache _GTF result and
878 * schedule _GTF.
879 */
Tejun Heo1eca4362008-11-03 20:03:17 +0900880 ata_for_each_dev(dev, &ap->link, ALL) {
Tejun Heo398e0782007-12-15 15:05:03 +0900881 ata_acpi_clear_gtf(dev);
Shaohua Li48feb3c2008-03-25 16:50:45 +0800882 if (ata_dev_enabled(dev) &&
883 ata_dev_get_GTF(dev, NULL) >= 0)
Tejun Heo398e0782007-12-15 15:05:03 +0900884 dev->flags |= ATA_DFLAG_ACPI_PENDING;
885 }
886 } else {
887 /* SATA _GTF needs to be evaulated after _SDD and
888 * there's no reason to evaluate IDE _GTF early
889 * without _STM. Clear cache and schedule _GTF.
890 */
Tejun Heo1eca4362008-11-03 20:03:17 +0900891 ata_for_each_dev(dev, &ap->link, ALL) {
Tejun Heo398e0782007-12-15 15:05:03 +0900892 ata_acpi_clear_gtf(dev);
Shaohua Li48feb3c2008-03-25 16:50:45 +0800893 if (ata_dev_enabled(dev))
894 dev->flags |= ATA_DFLAG_ACPI_PENDING;
Tejun Heo398e0782007-12-15 15:05:03 +0900895 }
896 }
Tejun Heo67465442007-05-15 03:28:16 +0900897}
898
899/**
Shaohua Libd3adca2007-11-02 09:32:38 +0800900 * ata_acpi_set_state - set the port power state
901 * @ap: target ATA port
902 * @state: state, on/off
903 *
904 * This function executes the _PS0/_PS3 ACPI method to set the power state.
905 * ACPI spec requires _PS0 when IDE power on and _PS3 when power off
906 */
907void ata_acpi_set_state(struct ata_port *ap, pm_message_t state)
908{
909 struct ata_device *dev;
910
911 if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA))
912 return;
913
914 /* channel first and then drives for power on and vica versa
915 for power off */
916 if (state.event == PM_EVENT_ON)
917 acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0);
918
Tejun Heo1eca4362008-11-03 20:03:17 +0900919 ata_for_each_dev(dev, &ap->link, ENABLED) {
920 if (dev->acpi_handle)
Shaohua Libd3adca2007-11-02 09:32:38 +0800921 acpi_bus_set_power(dev->acpi_handle,
922 state.event == PM_EVENT_ON ?
923 ACPI_STATE_D0 : ACPI_STATE_D3);
924 }
925 if (state.event != PM_EVENT_ON)
926 acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3);
927}
928
929/**
Tejun Heo67465442007-05-15 03:28:16 +0900930 * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration
931 * @dev: target ATA device
932 *
933 * This function is called when @dev is about to be configured.
934 * IDENTIFY data might have been modified after this hook is run.
935 *
936 * LOCKING:
937 * EH context.
938 *
939 * RETURNS:
940 * Positive number if IDENTIFY data needs to be refreshed, 0 if not,
941 * -errno on failure.
942 */
943int ata_acpi_on_devcfg(struct ata_device *dev)
944{
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900945 struct ata_port *ap = dev->link->ap;
946 struct ata_eh_context *ehc = &ap->link.eh_context;
Tejun Heo67465442007-05-15 03:28:16 +0900947 int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA;
Tejun Heo66fa7f22007-12-15 15:05:04 +0900948 int nr_executed = 0;
Tejun Heo67465442007-05-15 03:28:16 +0900949 int rc;
950
Tejun Heo67465442007-05-15 03:28:16 +0900951 if (!dev->acpi_handle)
952 return 0;
953
954 /* do we need to do _GTF? */
955 if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) &&
956 !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET)))
957 return 0;
958
959 /* do _SDD if SATA */
960 if (acpi_sata) {
961 rc = ata_acpi_push_id(dev);
Tejun Heof2406772009-11-18 22:24:21 +0900962 if (rc && rc != -ENOENT)
Tejun Heo67465442007-05-15 03:28:16 +0900963 goto acpi_err;
964 }
965
966 /* do _GTF */
Tejun Heo66fa7f22007-12-15 15:05:04 +0900967 rc = ata_acpi_exec_tfs(dev, &nr_executed);
968 if (rc)
Tejun Heo67465442007-05-15 03:28:16 +0900969 goto acpi_err;
970
971 dev->flags &= ~ATA_DFLAG_ACPI_PENDING;
972
973 /* refresh IDENTIFY page if any _GTF command has been executed */
Tejun Heo66fa7f22007-12-15 15:05:04 +0900974 if (nr_executed) {
Tejun Heo67465442007-05-15 03:28:16 +0900975 rc = ata_dev_reread_id(dev, 0);
976 if (rc < 0) {
Joe Perchesa9a79df2011-04-15 15:51:59 -0700977 ata_dev_err(dev,
978 "failed to IDENTIFY after ACPI commands\n");
Tejun Heo67465442007-05-15 03:28:16 +0900979 return rc;
980 }
981 }
982
983 return 0;
984
985 acpi_err:
Tejun Heo66fa7f22007-12-15 15:05:04 +0900986 /* ignore evaluation failure if we can continue safely */
987 if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
988 return 0;
Tejun Heo67465442007-05-15 03:28:16 +0900989
Tejun Heo66fa7f22007-12-15 15:05:04 +0900990 /* fail and let EH retry once more for unknown IO errors */
991 if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) {
992 dev->flags |= ATA_DFLAG_ACPI_FAILED;
993 return rc;
Tejun Heo67465442007-05-15 03:28:16 +0900994 }
Tejun Heo66fa7f22007-12-15 15:05:04 +0900995
Joe Perchesa9a79df2011-04-15 15:51:59 -0700996 ata_dev_warn(dev, "ACPI: failed the second time, disabled\n");
Tejun Heo66fa7f22007-12-15 15:05:04 +0900997 dev->acpi_handle = NULL;
998
999 /* We can safely continue if no _GTF command has been executed
1000 * and port is not frozen.
1001 */
1002 if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
1003 return 0;
1004
Tejun Heo67465442007-05-15 03:28:16 +09001005 return rc;
1006}
Tejun Heo562f0c22007-12-15 15:05:01 +09001007
1008/**
1009 * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled
1010 * @dev: target ATA device
1011 *
1012 * This function is called when @dev is about to be disabled.
1013 *
1014 * LOCKING:
1015 * EH context.
1016 */
1017void ata_acpi_on_disable(struct ata_device *dev)
1018{
Tejun Heo398e0782007-12-15 15:05:03 +09001019 ata_acpi_clear_gtf(dev);
Tejun Heo562f0c22007-12-15 15:05:01 +09001020}