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1/*
2 * Provides ACPI support for IDE drives.
3 *
4 * Copyright (C) 2005 Intel Corp.
5 * Copyright (C) 2005 Randy Dunlap
6 * Copyright (C) 2006 SUSE Linux Products GmbH
7 * Copyright (C) 2006 Hannes Reinecke
8 */
9
10#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/slab.h>
16#include <acpi/acpi.h>
17#include <linux/ide.h>
18#include <linux/pci.h>
19#include <linux/dmi.h>
20
21#include <acpi/acpi_bus.h>
22
23#define REGS_PER_GTF 7
24
25struct GTM_buffer {
26 u32 PIO_speed0;
27 u32 DMA_speed0;
28 u32 PIO_speed1;
29 u32 DMA_speed1;
30 u32 GTM_flags;
31};
32
33struct ide_acpi_drive_link {
34 acpi_handle obj_handle;
35 u8 idbuff[512];
36};
37
38struct ide_acpi_hwif_link {
39 ide_hwif_t *hwif;
40 acpi_handle obj_handle;
41 struct GTM_buffer gtm;
42 struct ide_acpi_drive_link master;
43 struct ide_acpi_drive_link slave;
44};
45
46#undef DEBUGGING
47/* note: adds function name and KERN_DEBUG */
48#ifdef DEBUGGING
49#define DEBPRINT(fmt, args...) \
50 printk(KERN_DEBUG "%s: " fmt, __func__, ## args)
51#else
52#define DEBPRINT(fmt, args...) do {} while (0)
53#endif /* DEBUGGING */
54
55static int ide_noacpi;
56module_param_named(noacpi, ide_noacpi, bool, 0);
57MODULE_PARM_DESC(noacpi, "disable IDE ACPI support");
58
59static int ide_acpigtf;
60module_param_named(acpigtf, ide_acpigtf, bool, 0);
61MODULE_PARM_DESC(acpigtf, "enable IDE ACPI _GTF support");
62
63static int ide_acpionboot;
64module_param_named(acpionboot, ide_acpionboot, bool, 0);
65MODULE_PARM_DESC(acpionboot, "call IDE ACPI methods on boot");
66
67static bool ide_noacpi_psx;
68static int no_acpi_psx(const struct dmi_system_id *id)
69{
70 ide_noacpi_psx = true;
71 printk(KERN_NOTICE"%s detected - disable ACPI _PSx.\n", id->ident);
72 return 0;
73}
74
75static const struct dmi_system_id ide_acpi_dmi_table[] = {
76 /* Bug 9673. */
77 /* We should check if this is because ACPI NVS isn't save/restored. */
78 {
79 .callback = no_acpi_psx,
80 .ident = "HP nx9005",
81 .matches = {
82 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies Ltd."),
83 DMI_MATCH(DMI_BIOS_VERSION, "KAM1.60")
84 },
85 },
86
87 { } /* terminate list */
88};
89
90int ide_acpi_init(void)
91{
92 dmi_check_system(ide_acpi_dmi_table);
93 return 0;
94}
95
96bool ide_port_acpi(ide_hwif_t *hwif)
97{
98 return ide_noacpi == 0 && hwif->acpidata;
99}
100
101/**
102 * ide_get_dev_handle - finds acpi_handle and PCI device.function
103 * @dev: device to locate
104 * @handle: returned acpi_handle for @dev
105 * @pcidevfn: return PCI device.func for @dev
106 *
107 * Returns the ACPI object handle to the corresponding PCI device.
108 *
109 * Returns 0 on success, <0 on error.
110 */
111static int ide_get_dev_handle(struct device *dev, acpi_handle *handle,
112 u64 *pcidevfn)
113{
114 struct pci_dev *pdev = to_pci_dev(dev);
115 unsigned int bus, devnum, func;
116 u64 addr;
117 acpi_handle dev_handle;
118 acpi_status status;
119 struct acpi_device_info *dinfo = NULL;
120 int ret = -ENODEV;
121
122 bus = pdev->bus->number;
123 devnum = PCI_SLOT(pdev->devfn);
124 func = PCI_FUNC(pdev->devfn);
125 /* ACPI _ADR encoding for PCI bus: */
126 addr = (u64)(devnum << 16 | func);
127
128 DEBPRINT("ENTER: pci %02x:%02x.%01x\n", bus, devnum, func);
129
130 dev_handle = DEVICE_ACPI_HANDLE(dev);
131 if (!dev_handle) {
132 DEBPRINT("no acpi handle for device\n");
133 goto err;
134 }
135
136 status = acpi_get_object_info(dev_handle, &dinfo);
137 if (ACPI_FAILURE(status)) {
138 DEBPRINT("get_object_info for device failed\n");
139 goto err;
140 }
141 if (dinfo && (dinfo->valid & ACPI_VALID_ADR) &&
142 dinfo->address == addr) {
143 *pcidevfn = addr;
144 *handle = dev_handle;
145 } else {
146 DEBPRINT("get_object_info for device has wrong "
147 " address: %llu, should be %u\n",
148 dinfo ? (unsigned long long)dinfo->address : -1ULL,
149 (unsigned int)addr);
150 goto err;
151 }
152
153 DEBPRINT("for dev=0x%x.%x, addr=0x%llx, *handle=0x%p\n",
154 devnum, func, (unsigned long long)addr, *handle);
155 ret = 0;
156err:
157 kfree(dinfo);
158 return ret;
159}
160
161/**
162 * ide_acpi_hwif_get_handle - Get ACPI object handle for a given hwif
163 * @hwif: device to locate
164 *
165 * Retrieves the object handle for a given hwif.
166 *
167 * Returns handle on success, 0 on error.
168 */
169static acpi_handle ide_acpi_hwif_get_handle(ide_hwif_t *hwif)
170{
171 struct device *dev = hwif->gendev.parent;
172 acpi_handle uninitialized_var(dev_handle);
173 u64 pcidevfn;
174 acpi_handle chan_handle;
175 int err;
176
177 DEBPRINT("ENTER: device %s\n", hwif->name);
178
179 if (!dev) {
180 DEBPRINT("no PCI device for %s\n", hwif->name);
181 return NULL;
182 }
183
184 err = ide_get_dev_handle(dev, &dev_handle, &pcidevfn);
185 if (err < 0) {
186 DEBPRINT("ide_get_dev_handle failed (%d)\n", err);
187 return NULL;
188 }
189
190 /* get child objects of dev_handle == channel objects,
191 * + _their_ children == drive objects */
192 /* channel is hwif->channel */
193 chan_handle = acpi_get_child(dev_handle, hwif->channel);
194 DEBPRINT("chan adr=%d: handle=0x%p\n",
195 hwif->channel, chan_handle);
196
197 return chan_handle;
198}
199
200/**
201 * do_drive_get_GTF - get the drive bootup default taskfile settings
202 * @drive: the drive for which the taskfile settings should be retrieved
203 * @gtf_length: number of bytes of _GTF data returned at @gtf_address
204 * @gtf_address: buffer containing _GTF taskfile arrays
205 *
206 * The _GTF method has no input parameters.
207 * It returns a variable number of register set values (registers
208 * hex 1F1..1F7, taskfiles).
209 * The <variable number> is not known in advance, so have ACPI-CA
210 * allocate the buffer as needed and return it, then free it later.
211 *
212 * The returned @gtf_length and @gtf_address are only valid if the
213 * function return value is 0.
214 */
215static int do_drive_get_GTF(ide_drive_t *drive,
216 unsigned int *gtf_length, unsigned long *gtf_address,
217 unsigned long *obj_loc)
218{
219 acpi_status status;
220 struct acpi_buffer output;
221 union acpi_object *out_obj;
222 int err = -ENODEV;
223
224 *gtf_length = 0;
225 *gtf_address = 0UL;
226 *obj_loc = 0UL;
227
228 if (!drive->acpidata->obj_handle) {
229 DEBPRINT("No ACPI object found for %s\n", drive->name);
230 goto out;
231 }
232
233 /* Setting up output buffer */
234 output.length = ACPI_ALLOCATE_BUFFER;
235 output.pointer = NULL; /* ACPI-CA sets this; save/free it later */
236
237 /* _GTF has no input parameters */
238 err = -EIO;
239 status = acpi_evaluate_object(drive->acpidata->obj_handle, "_GTF",
240 NULL, &output);
241 if (ACPI_FAILURE(status)) {
242 printk(KERN_DEBUG
243 "%s: Run _GTF error: status = 0x%x\n",
244 __func__, status);
245 goto out;
246 }
247
248 if (!output.length || !output.pointer) {
249 DEBPRINT("Run _GTF: "
250 "length or ptr is NULL (0x%llx, 0x%p)\n",
251 (unsigned long long)output.length,
252 output.pointer);
253 goto out;
254 }
255
256 out_obj = output.pointer;
257 if (out_obj->type != ACPI_TYPE_BUFFER) {
258 DEBPRINT("Run _GTF: error: "
259 "expected object type of ACPI_TYPE_BUFFER, "
260 "got 0x%x\n", out_obj->type);
261 err = -ENOENT;
262 kfree(output.pointer);
263 goto out;
264 }
265
266 if (!out_obj->buffer.length || !out_obj->buffer.pointer ||
267 out_obj->buffer.length % REGS_PER_GTF) {
268 printk(KERN_ERR
269 "%s: unexpected GTF length (%d) or addr (0x%p)\n",
270 __func__, out_obj->buffer.length,
271 out_obj->buffer.pointer);
272 err = -ENOENT;
273 kfree(output.pointer);
274 goto out;
275 }
276
277 *gtf_length = out_obj->buffer.length;
278 *gtf_address = (unsigned long)out_obj->buffer.pointer;
279 *obj_loc = (unsigned long)out_obj;
280 DEBPRINT("returning gtf_length=%d, gtf_address=0x%lx, obj_loc=0x%lx\n",
281 *gtf_length, *gtf_address, *obj_loc);
282 err = 0;
283out:
284 return err;
285}
286
287/**
288 * do_drive_set_taskfiles - write the drive taskfile settings from _GTF
289 * @drive: the drive to which the taskfile command should be sent
290 * @gtf_length: total number of bytes of _GTF taskfiles
291 * @gtf_address: location of _GTF taskfile arrays
292 *
293 * Write {gtf_address, length gtf_length} in groups of
294 * REGS_PER_GTF bytes.
295 */
296static int do_drive_set_taskfiles(ide_drive_t *drive,
297 unsigned int gtf_length,
298 unsigned long gtf_address)
299{
300 int rc = 0, err;
301 int gtf_count = gtf_length / REGS_PER_GTF;
302 int ix;
303
304 DEBPRINT("total GTF bytes=%u (0x%x), gtf_count=%d, addr=0x%lx\n",
305 gtf_length, gtf_length, gtf_count, gtf_address);
306
307 /* send all taskfile registers (0x1f1-0x1f7) *in*that*order* */
308 for (ix = 0; ix < gtf_count; ix++) {
309 u8 *gtf = (u8 *)(gtf_address + ix * REGS_PER_GTF);
310 struct ide_cmd cmd;
311
312 DEBPRINT("(0x1f1-1f7): "
313 "hex: %02x %02x %02x %02x %02x %02x %02x\n",
314 gtf[0], gtf[1], gtf[2],
315 gtf[3], gtf[4], gtf[5], gtf[6]);
316
317 if (!ide_acpigtf) {
318 DEBPRINT("_GTF execution disabled\n");
319 continue;
320 }
321
322 /* convert GTF to taskfile */
323 memset(&cmd, 0, sizeof(cmd));
324 memcpy(&cmd.tf.feature, gtf, REGS_PER_GTF);
325 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
326 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
327
328 err = ide_no_data_taskfile(drive, &cmd);
329 if (err) {
330 printk(KERN_ERR "%s: ide_no_data_taskfile failed: %u\n",
331 __func__, err);
332 rc = err;
333 }
334 }
335
336 return rc;
337}
338
339/**
340 * ide_acpi_exec_tfs - get then write drive taskfile settings
341 * @drive: the drive for which the taskfile settings should be
342 * written.
343 *
344 * According to the ACPI spec this should be called after _STM
345 * has been evaluated for the interface. Some ACPI vendors interpret
346 * that as a hard requirement and modify the taskfile according
347 * to the Identify Drive information passed down with _STM.
348 * So one should really make sure to call this only after _STM has
349 * been executed.
350 */
351int ide_acpi_exec_tfs(ide_drive_t *drive)
352{
353 int ret;
354 unsigned int gtf_length;
355 unsigned long gtf_address;
356 unsigned long obj_loc;
357
358 DEBPRINT("call get_GTF, drive=%s port=%d\n", drive->name, drive->dn);
359
360 ret = do_drive_get_GTF(drive, >f_length, >f_address, &obj_loc);
361 if (ret < 0) {
362 DEBPRINT("get_GTF error (%d)\n", ret);
363 return ret;
364 }
365
366 DEBPRINT("call set_taskfiles, drive=%s\n", drive->name);
367
368 ret = do_drive_set_taskfiles(drive, gtf_length, gtf_address);
369 kfree((void *)obj_loc);
370 if (ret < 0) {
371 DEBPRINT("set_taskfiles error (%d)\n", ret);
372 }
373
374 DEBPRINT("ret=%d\n", ret);
375
376 return ret;
377}
378
379/**
380 * ide_acpi_get_timing - get the channel (controller) timings
381 * @hwif: target IDE interface (channel)
382 *
383 * This function executes the _GTM ACPI method for the target channel.
384 *
385 */
386void ide_acpi_get_timing(ide_hwif_t *hwif)
387{
388 acpi_status status;
389 struct acpi_buffer output;
390 union acpi_object *out_obj;
391
392 /* Setting up output buffer for _GTM */
393 output.length = ACPI_ALLOCATE_BUFFER;
394 output.pointer = NULL; /* ACPI-CA sets this; save/free it later */
395
396 /* _GTM has no input parameters */
397 status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_GTM",
398 NULL, &output);
399
400 DEBPRINT("_GTM status: %d, outptr: 0x%p, outlen: 0x%llx\n",
401 status, output.pointer,
402 (unsigned long long)output.length);
403
404 if (ACPI_FAILURE(status)) {
405 DEBPRINT("Run _GTM error: status = 0x%x\n", status);
406 return;
407 }
408
409 if (!output.length || !output.pointer) {
410 DEBPRINT("Run _GTM: length or ptr is NULL (0x%llx, 0x%p)\n",
411 (unsigned long long)output.length,
412 output.pointer);
413 kfree(output.pointer);
414 return;
415 }
416
417 out_obj = output.pointer;
418 if (out_obj->type != ACPI_TYPE_BUFFER) {
419 DEBPRINT("Run _GTM: error: "
420 "expected object type of ACPI_TYPE_BUFFER, "
421 "got 0x%x\n", out_obj->type);
422 kfree(output.pointer);
423 return;
424 }
425
426 if (!out_obj->buffer.length || !out_obj->buffer.pointer ||
427 out_obj->buffer.length != sizeof(struct GTM_buffer)) {
428 printk(KERN_ERR
429 "%s: unexpected _GTM length (0x%x)[should be 0x%zx] or "
430 "addr (0x%p)\n",
431 __func__, out_obj->buffer.length,
432 sizeof(struct GTM_buffer), out_obj->buffer.pointer);
433 kfree(output.pointer);
434 return;
435 }
436
437 memcpy(&hwif->acpidata->gtm, out_obj->buffer.pointer,
438 sizeof(struct GTM_buffer));
439
440 DEBPRINT("_GTM info: ptr: 0x%p, len: 0x%x, exp.len: 0x%Zx\n",
441 out_obj->buffer.pointer, out_obj->buffer.length,
442 sizeof(struct GTM_buffer));
443
444 DEBPRINT("_GTM fields: 0x%x, 0x%x, 0x%x, 0x%x, 0x%x\n",
445 hwif->acpidata->gtm.PIO_speed0,
446 hwif->acpidata->gtm.DMA_speed0,
447 hwif->acpidata->gtm.PIO_speed1,
448 hwif->acpidata->gtm.DMA_speed1,
449 hwif->acpidata->gtm.GTM_flags);
450
451 kfree(output.pointer);
452}
453
454/**
455 * ide_acpi_push_timing - set the channel (controller) timings
456 * @hwif: target IDE interface (channel)
457 *
458 * This function executes the _STM ACPI method for the target channel.
459 *
460 * _STM requires Identify Drive data, which has to passed as an argument.
461 * Unfortunately drive->id is a mangled version which we can't readily
462 * use; hence we'll get the information afresh.
463 */
464void ide_acpi_push_timing(ide_hwif_t *hwif)
465{
466 acpi_status status;
467 struct acpi_object_list input;
468 union acpi_object in_params[3];
469 struct ide_acpi_drive_link *master = &hwif->acpidata->master;
470 struct ide_acpi_drive_link *slave = &hwif->acpidata->slave;
471
472 /* Give the GTM buffer + drive Identify data to the channel via the
473 * _STM method: */
474 /* setup input parameters buffer for _STM */
475 input.count = 3;
476 input.pointer = in_params;
477 in_params[0].type = ACPI_TYPE_BUFFER;
478 in_params[0].buffer.length = sizeof(struct GTM_buffer);
479 in_params[0].buffer.pointer = (u8 *)&hwif->acpidata->gtm;
480 in_params[1].type = ACPI_TYPE_BUFFER;
481 in_params[1].buffer.length = ATA_ID_WORDS * 2;
482 in_params[1].buffer.pointer = (u8 *)&master->idbuff;
483 in_params[2].type = ACPI_TYPE_BUFFER;
484 in_params[2].buffer.length = ATA_ID_WORDS * 2;
485 in_params[2].buffer.pointer = (u8 *)&slave->idbuff;
486 /* Output buffer: _STM has no output */
487
488 status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_STM",
489 &input, NULL);
490
491 if (ACPI_FAILURE(status)) {
492 DEBPRINT("Run _STM error: status = 0x%x\n", status);
493 }
494 DEBPRINT("_STM status: %d\n", status);
495}
496
497/**
498 * ide_acpi_set_state - set the channel power state
499 * @hwif: target IDE interface
500 * @on: state, on/off
501 *
502 * This function executes the _PS0/_PS3 ACPI method to set the power state.
503 * ACPI spec requires _PS0 when IDE power on and _PS3 when power off
504 */
505void ide_acpi_set_state(ide_hwif_t *hwif, int on)
506{
507 ide_drive_t *drive;
508 int i;
509
510 if (ide_noacpi_psx)
511 return;
512
513 DEBPRINT("ENTER:\n");
514
515 /* channel first and then drives for power on and verse versa for power off */
516 if (on)
517 acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D0);
518
519 ide_port_for_each_present_dev(i, drive, hwif) {
520 if (drive->acpidata->obj_handle)
521 acpi_bus_set_power(drive->acpidata->obj_handle,
522 on ? ACPI_STATE_D0 : ACPI_STATE_D3);
523 }
524
525 if (!on)
526 acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D3);
527}
528
529/**
530 * ide_acpi_init_port - initialize the ACPI link for an IDE interface
531 * @hwif: target IDE interface (channel)
532 *
533 * The ACPI spec is not quite clear when the drive identify buffer
534 * should be obtained. Calling IDENTIFY DEVICE during shutdown
535 * is not the best of ideas as the drive might already being put to
536 * sleep. And obviously we can't call it during resume.
537 * So we get the information during startup; but this means that
538 * any changes during run-time will be lost after resume.
539 */
540void ide_acpi_init_port(ide_hwif_t *hwif)
541{
542 hwif->acpidata = kzalloc(sizeof(struct ide_acpi_hwif_link), GFP_KERNEL);
543 if (!hwif->acpidata)
544 return;
545
546 hwif->acpidata->obj_handle = ide_acpi_hwif_get_handle(hwif);
547 if (!hwif->acpidata->obj_handle) {
548 DEBPRINT("no ACPI object for %s found\n", hwif->name);
549 kfree(hwif->acpidata);
550 hwif->acpidata = NULL;
551 }
552}
553
554void ide_acpi_port_init_devices(ide_hwif_t *hwif)
555{
556 ide_drive_t *drive;
557 int i, err;
558
559 if (hwif->acpidata == NULL)
560 return;
561
562 /*
563 * The ACPI spec mandates that we send information
564 * for both drives, regardless whether they are connected
565 * or not.
566 */
567 hwif->devices[0]->acpidata = &hwif->acpidata->master;
568 hwif->devices[1]->acpidata = &hwif->acpidata->slave;
569
570 /* get _ADR info for each device */
571 ide_port_for_each_present_dev(i, drive, hwif) {
572 acpi_handle dev_handle;
573
574 DEBPRINT("ENTER: %s at channel#: %d port#: %d\n",
575 drive->name, hwif->channel, drive->dn & 1);
576
577 /* TBD: could also check ACPI object VALID bits */
578 dev_handle = acpi_get_child(hwif->acpidata->obj_handle,
579 drive->dn & 1);
580
581 DEBPRINT("drive %s handle 0x%p\n", drive->name, dev_handle);
582
583 drive->acpidata->obj_handle = dev_handle;
584 }
585
586 /* send IDENTIFY for each device */
587 ide_port_for_each_present_dev(i, drive, hwif) {
588 err = taskfile_lib_get_identify(drive, drive->acpidata->idbuff);
589 if (err)
590 DEBPRINT("identify device %s failed (%d)\n",
591 drive->name, err);
592 }
593
594 if (ide_noacpi || ide_acpionboot == 0) {
595 DEBPRINT("ACPI methods disabled on boot\n");
596 return;
597 }
598
599 /* ACPI _PS0 before _STM */
600 ide_acpi_set_state(hwif, 1);
601 /*
602 * ACPI requires us to call _STM on startup
603 */
604 ide_acpi_get_timing(hwif);
605 ide_acpi_push_timing(hwif);
606
607 ide_port_for_each_present_dev(i, drive, hwif) {
608 ide_acpi_exec_tfs(drive);
609 }
610}
1/*
2 * Provides ACPI support for IDE drives.
3 *
4 * Copyright (C) 2005 Intel Corp.
5 * Copyright (C) 2005 Randy Dunlap
6 * Copyright (C) 2006 SUSE Linux Products GmbH
7 * Copyright (C) 2006 Hannes Reinecke
8 */
9
10#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/slab.h>
16#include <acpi/acpi.h>
17#include <linux/ide.h>
18#include <linux/pci.h>
19#include <linux/dmi.h>
20#include <linux/module.h>
21
22#include <acpi/acpi_bus.h>
23
24#define REGS_PER_GTF 7
25
26struct GTM_buffer {
27 u32 PIO_speed0;
28 u32 DMA_speed0;
29 u32 PIO_speed1;
30 u32 DMA_speed1;
31 u32 GTM_flags;
32};
33
34struct ide_acpi_drive_link {
35 acpi_handle obj_handle;
36 u8 idbuff[512];
37};
38
39struct ide_acpi_hwif_link {
40 ide_hwif_t *hwif;
41 acpi_handle obj_handle;
42 struct GTM_buffer gtm;
43 struct ide_acpi_drive_link master;
44 struct ide_acpi_drive_link slave;
45};
46
47#undef DEBUGGING
48/* note: adds function name and KERN_DEBUG */
49#ifdef DEBUGGING
50#define DEBPRINT(fmt, args...) \
51 printk(KERN_DEBUG "%s: " fmt, __func__, ## args)
52#else
53#define DEBPRINT(fmt, args...) do {} while (0)
54#endif /* DEBUGGING */
55
56static bool ide_noacpi;
57module_param_named(noacpi, ide_noacpi, bool, 0);
58MODULE_PARM_DESC(noacpi, "disable IDE ACPI support");
59
60static bool ide_acpigtf;
61module_param_named(acpigtf, ide_acpigtf, bool, 0);
62MODULE_PARM_DESC(acpigtf, "enable IDE ACPI _GTF support");
63
64static bool ide_acpionboot;
65module_param_named(acpionboot, ide_acpionboot, bool, 0);
66MODULE_PARM_DESC(acpionboot, "call IDE ACPI methods on boot");
67
68static bool ide_noacpi_psx;
69static int no_acpi_psx(const struct dmi_system_id *id)
70{
71 ide_noacpi_psx = true;
72 printk(KERN_NOTICE"%s detected - disable ACPI _PSx.\n", id->ident);
73 return 0;
74}
75
76static const struct dmi_system_id ide_acpi_dmi_table[] = {
77 /* Bug 9673. */
78 /* We should check if this is because ACPI NVS isn't save/restored. */
79 {
80 .callback = no_acpi_psx,
81 .ident = "HP nx9005",
82 .matches = {
83 DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies Ltd."),
84 DMI_MATCH(DMI_BIOS_VERSION, "KAM1.60")
85 },
86 },
87
88 { } /* terminate list */
89};
90
91int ide_acpi_init(void)
92{
93 dmi_check_system(ide_acpi_dmi_table);
94 return 0;
95}
96
97bool ide_port_acpi(ide_hwif_t *hwif)
98{
99 return ide_noacpi == 0 && hwif->acpidata;
100}
101
102/**
103 * ide_get_dev_handle - finds acpi_handle and PCI device.function
104 * @dev: device to locate
105 * @handle: returned acpi_handle for @dev
106 * @pcidevfn: return PCI device.func for @dev
107 *
108 * Returns the ACPI object handle to the corresponding PCI device.
109 *
110 * Returns 0 on success, <0 on error.
111 */
112static int ide_get_dev_handle(struct device *dev, acpi_handle *handle,
113 u64 *pcidevfn)
114{
115 struct pci_dev *pdev = to_pci_dev(dev);
116 unsigned int bus, devnum, func;
117 u64 addr;
118 acpi_handle dev_handle;
119 acpi_status status;
120 struct acpi_device_info *dinfo = NULL;
121 int ret = -ENODEV;
122
123 bus = pdev->bus->number;
124 devnum = PCI_SLOT(pdev->devfn);
125 func = PCI_FUNC(pdev->devfn);
126 /* ACPI _ADR encoding for PCI bus: */
127 addr = (u64)(devnum << 16 | func);
128
129 DEBPRINT("ENTER: pci %02x:%02x.%01x\n", bus, devnum, func);
130
131 dev_handle = DEVICE_ACPI_HANDLE(dev);
132 if (!dev_handle) {
133 DEBPRINT("no acpi handle for device\n");
134 goto err;
135 }
136
137 status = acpi_get_object_info(dev_handle, &dinfo);
138 if (ACPI_FAILURE(status)) {
139 DEBPRINT("get_object_info for device failed\n");
140 goto err;
141 }
142 if (dinfo && (dinfo->valid & ACPI_VALID_ADR) &&
143 dinfo->address == addr) {
144 *pcidevfn = addr;
145 *handle = dev_handle;
146 } else {
147 DEBPRINT("get_object_info for device has wrong "
148 " address: %llu, should be %u\n",
149 dinfo ? (unsigned long long)dinfo->address : -1ULL,
150 (unsigned int)addr);
151 goto err;
152 }
153
154 DEBPRINT("for dev=0x%x.%x, addr=0x%llx, *handle=0x%p\n",
155 devnum, func, (unsigned long long)addr, *handle);
156 ret = 0;
157err:
158 kfree(dinfo);
159 return ret;
160}
161
162/**
163 * ide_acpi_hwif_get_handle - Get ACPI object handle for a given hwif
164 * @hwif: device to locate
165 *
166 * Retrieves the object handle for a given hwif.
167 *
168 * Returns handle on success, 0 on error.
169 */
170static acpi_handle ide_acpi_hwif_get_handle(ide_hwif_t *hwif)
171{
172 struct device *dev = hwif->gendev.parent;
173 acpi_handle uninitialized_var(dev_handle);
174 u64 pcidevfn;
175 acpi_handle chan_handle;
176 int err;
177
178 DEBPRINT("ENTER: device %s\n", hwif->name);
179
180 if (!dev) {
181 DEBPRINT("no PCI device for %s\n", hwif->name);
182 return NULL;
183 }
184
185 err = ide_get_dev_handle(dev, &dev_handle, &pcidevfn);
186 if (err < 0) {
187 DEBPRINT("ide_get_dev_handle failed (%d)\n", err);
188 return NULL;
189 }
190
191 /* get child objects of dev_handle == channel objects,
192 * + _their_ children == drive objects */
193 /* channel is hwif->channel */
194 chan_handle = acpi_get_child(dev_handle, hwif->channel);
195 DEBPRINT("chan adr=%d: handle=0x%p\n",
196 hwif->channel, chan_handle);
197
198 return chan_handle;
199}
200
201/**
202 * do_drive_get_GTF - get the drive bootup default taskfile settings
203 * @drive: the drive for which the taskfile settings should be retrieved
204 * @gtf_length: number of bytes of _GTF data returned at @gtf_address
205 * @gtf_address: buffer containing _GTF taskfile arrays
206 *
207 * The _GTF method has no input parameters.
208 * It returns a variable number of register set values (registers
209 * hex 1F1..1F7, taskfiles).
210 * The <variable number> is not known in advance, so have ACPI-CA
211 * allocate the buffer as needed and return it, then free it later.
212 *
213 * The returned @gtf_length and @gtf_address are only valid if the
214 * function return value is 0.
215 */
216static int do_drive_get_GTF(ide_drive_t *drive,
217 unsigned int *gtf_length, unsigned long *gtf_address,
218 unsigned long *obj_loc)
219{
220 acpi_status status;
221 struct acpi_buffer output;
222 union acpi_object *out_obj;
223 int err = -ENODEV;
224
225 *gtf_length = 0;
226 *gtf_address = 0UL;
227 *obj_loc = 0UL;
228
229 if (!drive->acpidata->obj_handle) {
230 DEBPRINT("No ACPI object found for %s\n", drive->name);
231 goto out;
232 }
233
234 /* Setting up output buffer */
235 output.length = ACPI_ALLOCATE_BUFFER;
236 output.pointer = NULL; /* ACPI-CA sets this; save/free it later */
237
238 /* _GTF has no input parameters */
239 err = -EIO;
240 status = acpi_evaluate_object(drive->acpidata->obj_handle, "_GTF",
241 NULL, &output);
242 if (ACPI_FAILURE(status)) {
243 printk(KERN_DEBUG
244 "%s: Run _GTF error: status = 0x%x\n",
245 __func__, status);
246 goto out;
247 }
248
249 if (!output.length || !output.pointer) {
250 DEBPRINT("Run _GTF: "
251 "length or ptr is NULL (0x%llx, 0x%p)\n",
252 (unsigned long long)output.length,
253 output.pointer);
254 goto out;
255 }
256
257 out_obj = output.pointer;
258 if (out_obj->type != ACPI_TYPE_BUFFER) {
259 DEBPRINT("Run _GTF: error: "
260 "expected object type of ACPI_TYPE_BUFFER, "
261 "got 0x%x\n", out_obj->type);
262 err = -ENOENT;
263 kfree(output.pointer);
264 goto out;
265 }
266
267 if (!out_obj->buffer.length || !out_obj->buffer.pointer ||
268 out_obj->buffer.length % REGS_PER_GTF) {
269 printk(KERN_ERR
270 "%s: unexpected GTF length (%d) or addr (0x%p)\n",
271 __func__, out_obj->buffer.length,
272 out_obj->buffer.pointer);
273 err = -ENOENT;
274 kfree(output.pointer);
275 goto out;
276 }
277
278 *gtf_length = out_obj->buffer.length;
279 *gtf_address = (unsigned long)out_obj->buffer.pointer;
280 *obj_loc = (unsigned long)out_obj;
281 DEBPRINT("returning gtf_length=%d, gtf_address=0x%lx, obj_loc=0x%lx\n",
282 *gtf_length, *gtf_address, *obj_loc);
283 err = 0;
284out:
285 return err;
286}
287
288/**
289 * do_drive_set_taskfiles - write the drive taskfile settings from _GTF
290 * @drive: the drive to which the taskfile command should be sent
291 * @gtf_length: total number of bytes of _GTF taskfiles
292 * @gtf_address: location of _GTF taskfile arrays
293 *
294 * Write {gtf_address, length gtf_length} in groups of
295 * REGS_PER_GTF bytes.
296 */
297static int do_drive_set_taskfiles(ide_drive_t *drive,
298 unsigned int gtf_length,
299 unsigned long gtf_address)
300{
301 int rc = 0, err;
302 int gtf_count = gtf_length / REGS_PER_GTF;
303 int ix;
304
305 DEBPRINT("total GTF bytes=%u (0x%x), gtf_count=%d, addr=0x%lx\n",
306 gtf_length, gtf_length, gtf_count, gtf_address);
307
308 /* send all taskfile registers (0x1f1-0x1f7) *in*that*order* */
309 for (ix = 0; ix < gtf_count; ix++) {
310 u8 *gtf = (u8 *)(gtf_address + ix * REGS_PER_GTF);
311 struct ide_cmd cmd;
312
313 DEBPRINT("(0x1f1-1f7): "
314 "hex: %02x %02x %02x %02x %02x %02x %02x\n",
315 gtf[0], gtf[1], gtf[2],
316 gtf[3], gtf[4], gtf[5], gtf[6]);
317
318 if (!ide_acpigtf) {
319 DEBPRINT("_GTF execution disabled\n");
320 continue;
321 }
322
323 /* convert GTF to taskfile */
324 memset(&cmd, 0, sizeof(cmd));
325 memcpy(&cmd.tf.feature, gtf, REGS_PER_GTF);
326 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
327 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
328
329 err = ide_no_data_taskfile(drive, &cmd);
330 if (err) {
331 printk(KERN_ERR "%s: ide_no_data_taskfile failed: %u\n",
332 __func__, err);
333 rc = err;
334 }
335 }
336
337 return rc;
338}
339
340/**
341 * ide_acpi_exec_tfs - get then write drive taskfile settings
342 * @drive: the drive for which the taskfile settings should be
343 * written.
344 *
345 * According to the ACPI spec this should be called after _STM
346 * has been evaluated for the interface. Some ACPI vendors interpret
347 * that as a hard requirement and modify the taskfile according
348 * to the Identify Drive information passed down with _STM.
349 * So one should really make sure to call this only after _STM has
350 * been executed.
351 */
352int ide_acpi_exec_tfs(ide_drive_t *drive)
353{
354 int ret;
355 unsigned int gtf_length;
356 unsigned long gtf_address;
357 unsigned long obj_loc;
358
359 DEBPRINT("call get_GTF, drive=%s port=%d\n", drive->name, drive->dn);
360
361 ret = do_drive_get_GTF(drive, >f_length, >f_address, &obj_loc);
362 if (ret < 0) {
363 DEBPRINT("get_GTF error (%d)\n", ret);
364 return ret;
365 }
366
367 DEBPRINT("call set_taskfiles, drive=%s\n", drive->name);
368
369 ret = do_drive_set_taskfiles(drive, gtf_length, gtf_address);
370 kfree((void *)obj_loc);
371 if (ret < 0) {
372 DEBPRINT("set_taskfiles error (%d)\n", ret);
373 }
374
375 DEBPRINT("ret=%d\n", ret);
376
377 return ret;
378}
379
380/**
381 * ide_acpi_get_timing - get the channel (controller) timings
382 * @hwif: target IDE interface (channel)
383 *
384 * This function executes the _GTM ACPI method for the target channel.
385 *
386 */
387void ide_acpi_get_timing(ide_hwif_t *hwif)
388{
389 acpi_status status;
390 struct acpi_buffer output;
391 union acpi_object *out_obj;
392
393 /* Setting up output buffer for _GTM */
394 output.length = ACPI_ALLOCATE_BUFFER;
395 output.pointer = NULL; /* ACPI-CA sets this; save/free it later */
396
397 /* _GTM has no input parameters */
398 status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_GTM",
399 NULL, &output);
400
401 DEBPRINT("_GTM status: %d, outptr: 0x%p, outlen: 0x%llx\n",
402 status, output.pointer,
403 (unsigned long long)output.length);
404
405 if (ACPI_FAILURE(status)) {
406 DEBPRINT("Run _GTM error: status = 0x%x\n", status);
407 return;
408 }
409
410 if (!output.length || !output.pointer) {
411 DEBPRINT("Run _GTM: length or ptr is NULL (0x%llx, 0x%p)\n",
412 (unsigned long long)output.length,
413 output.pointer);
414 kfree(output.pointer);
415 return;
416 }
417
418 out_obj = output.pointer;
419 if (out_obj->type != ACPI_TYPE_BUFFER) {
420 DEBPRINT("Run _GTM: error: "
421 "expected object type of ACPI_TYPE_BUFFER, "
422 "got 0x%x\n", out_obj->type);
423 kfree(output.pointer);
424 return;
425 }
426
427 if (!out_obj->buffer.length || !out_obj->buffer.pointer ||
428 out_obj->buffer.length != sizeof(struct GTM_buffer)) {
429 printk(KERN_ERR
430 "%s: unexpected _GTM length (0x%x)[should be 0x%zx] or "
431 "addr (0x%p)\n",
432 __func__, out_obj->buffer.length,
433 sizeof(struct GTM_buffer), out_obj->buffer.pointer);
434 kfree(output.pointer);
435 return;
436 }
437
438 memcpy(&hwif->acpidata->gtm, out_obj->buffer.pointer,
439 sizeof(struct GTM_buffer));
440
441 DEBPRINT("_GTM info: ptr: 0x%p, len: 0x%x, exp.len: 0x%Zx\n",
442 out_obj->buffer.pointer, out_obj->buffer.length,
443 sizeof(struct GTM_buffer));
444
445 DEBPRINT("_GTM fields: 0x%x, 0x%x, 0x%x, 0x%x, 0x%x\n",
446 hwif->acpidata->gtm.PIO_speed0,
447 hwif->acpidata->gtm.DMA_speed0,
448 hwif->acpidata->gtm.PIO_speed1,
449 hwif->acpidata->gtm.DMA_speed1,
450 hwif->acpidata->gtm.GTM_flags);
451
452 kfree(output.pointer);
453}
454
455/**
456 * ide_acpi_push_timing - set the channel (controller) timings
457 * @hwif: target IDE interface (channel)
458 *
459 * This function executes the _STM ACPI method for the target channel.
460 *
461 * _STM requires Identify Drive data, which has to passed as an argument.
462 * Unfortunately drive->id is a mangled version which we can't readily
463 * use; hence we'll get the information afresh.
464 */
465void ide_acpi_push_timing(ide_hwif_t *hwif)
466{
467 acpi_status status;
468 struct acpi_object_list input;
469 union acpi_object in_params[3];
470 struct ide_acpi_drive_link *master = &hwif->acpidata->master;
471 struct ide_acpi_drive_link *slave = &hwif->acpidata->slave;
472
473 /* Give the GTM buffer + drive Identify data to the channel via the
474 * _STM method: */
475 /* setup input parameters buffer for _STM */
476 input.count = 3;
477 input.pointer = in_params;
478 in_params[0].type = ACPI_TYPE_BUFFER;
479 in_params[0].buffer.length = sizeof(struct GTM_buffer);
480 in_params[0].buffer.pointer = (u8 *)&hwif->acpidata->gtm;
481 in_params[1].type = ACPI_TYPE_BUFFER;
482 in_params[1].buffer.length = ATA_ID_WORDS * 2;
483 in_params[1].buffer.pointer = (u8 *)&master->idbuff;
484 in_params[2].type = ACPI_TYPE_BUFFER;
485 in_params[2].buffer.length = ATA_ID_WORDS * 2;
486 in_params[2].buffer.pointer = (u8 *)&slave->idbuff;
487 /* Output buffer: _STM has no output */
488
489 status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_STM",
490 &input, NULL);
491
492 if (ACPI_FAILURE(status)) {
493 DEBPRINT("Run _STM error: status = 0x%x\n", status);
494 }
495 DEBPRINT("_STM status: %d\n", status);
496}
497
498/**
499 * ide_acpi_set_state - set the channel power state
500 * @hwif: target IDE interface
501 * @on: state, on/off
502 *
503 * This function executes the _PS0/_PS3 ACPI method to set the power state.
504 * ACPI spec requires _PS0 when IDE power on and _PS3 when power off
505 */
506void ide_acpi_set_state(ide_hwif_t *hwif, int on)
507{
508 ide_drive_t *drive;
509 int i;
510
511 if (ide_noacpi_psx)
512 return;
513
514 DEBPRINT("ENTER:\n");
515
516 /* channel first and then drives for power on and verse versa for power off */
517 if (on)
518 acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D0);
519
520 ide_port_for_each_present_dev(i, drive, hwif) {
521 if (drive->acpidata->obj_handle)
522 acpi_bus_set_power(drive->acpidata->obj_handle,
523 on ? ACPI_STATE_D0 : ACPI_STATE_D3);
524 }
525
526 if (!on)
527 acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D3);
528}
529
530/**
531 * ide_acpi_init_port - initialize the ACPI link for an IDE interface
532 * @hwif: target IDE interface (channel)
533 *
534 * The ACPI spec is not quite clear when the drive identify buffer
535 * should be obtained. Calling IDENTIFY DEVICE during shutdown
536 * is not the best of ideas as the drive might already being put to
537 * sleep. And obviously we can't call it during resume.
538 * So we get the information during startup; but this means that
539 * any changes during run-time will be lost after resume.
540 */
541void ide_acpi_init_port(ide_hwif_t *hwif)
542{
543 hwif->acpidata = kzalloc(sizeof(struct ide_acpi_hwif_link), GFP_KERNEL);
544 if (!hwif->acpidata)
545 return;
546
547 hwif->acpidata->obj_handle = ide_acpi_hwif_get_handle(hwif);
548 if (!hwif->acpidata->obj_handle) {
549 DEBPRINT("no ACPI object for %s found\n", hwif->name);
550 kfree(hwif->acpidata);
551 hwif->acpidata = NULL;
552 }
553}
554
555void ide_acpi_port_init_devices(ide_hwif_t *hwif)
556{
557 ide_drive_t *drive;
558 int i, err;
559
560 if (hwif->acpidata == NULL)
561 return;
562
563 /*
564 * The ACPI spec mandates that we send information
565 * for both drives, regardless whether they are connected
566 * or not.
567 */
568 hwif->devices[0]->acpidata = &hwif->acpidata->master;
569 hwif->devices[1]->acpidata = &hwif->acpidata->slave;
570
571 /* get _ADR info for each device */
572 ide_port_for_each_present_dev(i, drive, hwif) {
573 acpi_handle dev_handle;
574
575 DEBPRINT("ENTER: %s at channel#: %d port#: %d\n",
576 drive->name, hwif->channel, drive->dn & 1);
577
578 /* TBD: could also check ACPI object VALID bits */
579 dev_handle = acpi_get_child(hwif->acpidata->obj_handle,
580 drive->dn & 1);
581
582 DEBPRINT("drive %s handle 0x%p\n", drive->name, dev_handle);
583
584 drive->acpidata->obj_handle = dev_handle;
585 }
586
587 /* send IDENTIFY for each device */
588 ide_port_for_each_present_dev(i, drive, hwif) {
589 err = taskfile_lib_get_identify(drive, drive->acpidata->idbuff);
590 if (err)
591 DEBPRINT("identify device %s failed (%d)\n",
592 drive->name, err);
593 }
594
595 if (ide_noacpi || ide_acpionboot == 0) {
596 DEBPRINT("ACPI methods disabled on boot\n");
597 return;
598 }
599
600 /* ACPI _PS0 before _STM */
601 ide_acpi_set_state(hwif, 1);
602 /*
603 * ACPI requires us to call _STM on startup
604 */
605 ide_acpi_get_timing(hwif);
606 ide_acpi_push_timing(hwif);
607
608 ide_port_for_each_present_dev(i, drive, hwif) {
609 ide_acpi_exec_tfs(drive);
610 }
611}