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Commit | Line | Data |
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11ef697b KCA |
1 | /* |
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 | ||
9 | #include <linux/ata.h> | |
10 | #include <linux/delay.h> | |
11 | #include <linux/device.h> | |
12 | #include <linux/errno.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/acpi.h> | |
15 | #include <linux/libata.h> | |
16 | #include <linux/pci.h> | |
17 | #include "libata.h" | |
18 | ||
19 | #include <acpi/acpi_bus.h> | |
20 | #include <acpi/acnames.h> | |
21 | #include <acpi/acnamesp.h> | |
22 | #include <acpi/acparser.h> | |
23 | #include <acpi/acexcep.h> | |
24 | #include <acpi/acmacros.h> | |
25 | #include <acpi/actypes.h> | |
26 | ||
27 | #define SATA_ROOT_PORT(x) (((x) >> 16) & 0xffff) | |
28 | #define SATA_PORT_NUMBER(x) ((x) & 0xffff) /* or NO_PORT_MULT */ | |
29 | #define NO_PORT_MULT 0xffff | |
30 | #define SATA_ADR_RSVD 0xffffffff | |
31 | ||
32 | #define REGS_PER_GTF 7 | |
33 | struct taskfile_array { | |
34 | u8 tfa[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ | |
35 | }; | |
36 | ||
ca426635 AC |
37 | /* |
38 | * Helper - belongs in the PCI layer somewhere eventually | |
39 | */ | |
40 | static int is_pci_dev(struct device *dev) | |
41 | { | |
42 | return (dev->bus == &pci_bus_type); | |
43 | } | |
11ef697b KCA |
44 | |
45 | /** | |
46 | * sata_get_dev_handle - finds acpi_handle and PCI device.function | |
47 | * @dev: device to locate | |
48 | * @handle: returned acpi_handle for @dev | |
49 | * @pcidevfn: return PCI device.func for @dev | |
50 | * | |
51 | * This function is somewhat SATA-specific. Or at least the | |
52 | * PATA & SATA versions of this function are different, | |
53 | * so it's not entirely generic code. | |
54 | * | |
55 | * Returns 0 on success, <0 on error. | |
56 | */ | |
57 | static int sata_get_dev_handle(struct device *dev, acpi_handle *handle, | |
58 | acpi_integer *pcidevfn) | |
59 | { | |
60 | struct pci_dev *pci_dev; | |
61 | acpi_integer addr; | |
62 | ||
ca426635 AC |
63 | if (!is_pci_dev(dev)) |
64 | return -ENODEV; | |
65 | ||
11ef697b KCA |
66 | pci_dev = to_pci_dev(dev); /* NOTE: PCI-specific */ |
67 | /* Please refer to the ACPI spec for the syntax of _ADR. */ | |
68 | addr = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn); | |
69 | *pcidevfn = addr; | |
70 | *handle = acpi_get_child(DEVICE_ACPI_HANDLE(dev->parent), addr); | |
71 | if (!*handle) | |
72 | return -ENODEV; | |
73 | return 0; | |
74 | } | |
75 | ||
76 | /** | |
77 | * pata_get_dev_handle - finds acpi_handle and PCI device.function | |
78 | * @dev: device to locate | |
79 | * @handle: returned acpi_handle for @dev | |
80 | * @pcidevfn: return PCI device.func for @dev | |
81 | * | |
82 | * The PATA and SATA versions of this function are different. | |
83 | * | |
84 | * Returns 0 on success, <0 on error. | |
85 | */ | |
86 | static int pata_get_dev_handle(struct device *dev, acpi_handle *handle, | |
87 | acpi_integer *pcidevfn) | |
88 | { | |
89 | unsigned int bus, devnum, func; | |
90 | acpi_integer addr; | |
91 | acpi_handle dev_handle, parent_handle; | |
92 | struct acpi_buffer buffer = {.length = ACPI_ALLOCATE_BUFFER, | |
93 | .pointer = NULL}; | |
94 | acpi_status status; | |
95 | struct acpi_device_info *dinfo = NULL; | |
96 | int ret = -ENODEV; | |
ca426635 AC |
97 | struct pci_dev *pdev; |
98 | ||
99 | if (!is_pci_dev(dev)) | |
100 | return -ENODEV; | |
101 | ||
102 | pdev = to_pci_dev(dev); | |
11ef697b KCA |
103 | |
104 | bus = pdev->bus->number; | |
105 | devnum = PCI_SLOT(pdev->devfn); | |
106 | func = PCI_FUNC(pdev->devfn); | |
107 | ||
108 | dev_handle = DEVICE_ACPI_HANDLE(dev); | |
109 | parent_handle = DEVICE_ACPI_HANDLE(dev->parent); | |
110 | ||
111 | status = acpi_get_object_info(parent_handle, &buffer); | |
112 | if (ACPI_FAILURE(status)) | |
113 | goto err; | |
114 | ||
115 | dinfo = buffer.pointer; | |
116 | if (dinfo && (dinfo->valid & ACPI_VALID_ADR) && | |
117 | dinfo->address == bus) { | |
118 | /* ACPI spec for _ADR for PCI bus: */ | |
119 | addr = (acpi_integer)(devnum << 16 | func); | |
120 | *pcidevfn = addr; | |
121 | *handle = dev_handle; | |
122 | } else { | |
123 | goto err; | |
124 | } | |
125 | ||
126 | if (!*handle) | |
127 | goto err; | |
128 | ret = 0; | |
129 | err: | |
130 | kfree(dinfo); | |
131 | return ret; | |
132 | } | |
133 | ||
134 | struct walk_info { /* can be trimmed some */ | |
135 | struct device *dev; | |
136 | struct acpi_device *adev; | |
137 | acpi_handle handle; | |
138 | acpi_integer pcidevfn; | |
139 | unsigned int drivenum; | |
140 | acpi_handle obj_handle; | |
141 | struct ata_port *ataport; | |
142 | struct ata_device *atadev; | |
143 | u32 sata_adr; | |
144 | int status; | |
145 | char basepath[ACPI_PATHNAME_MAX]; | |
146 | int basepath_len; | |
147 | }; | |
148 | ||
149 | static acpi_status get_devices(acpi_handle handle, | |
150 | u32 level, void *context, void **return_value) | |
151 | { | |
152 | acpi_status status; | |
153 | struct walk_info *winfo = context; | |
154 | struct acpi_buffer namebuf = {ACPI_ALLOCATE_BUFFER, NULL}; | |
155 | char *pathname; | |
156 | struct acpi_buffer buffer; | |
157 | struct acpi_device_info *dinfo; | |
158 | ||
159 | status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &namebuf); | |
160 | if (status) | |
161 | goto ret; | |
162 | pathname = namebuf.pointer; | |
163 | ||
164 | buffer.length = ACPI_ALLOCATE_BUFFER; | |
165 | buffer.pointer = NULL; | |
166 | status = acpi_get_object_info(handle, &buffer); | |
167 | if (ACPI_FAILURE(status)) | |
168 | goto out2; | |
169 | ||
170 | dinfo = buffer.pointer; | |
171 | ||
172 | /* find full device path name for pcidevfn */ | |
173 | if (dinfo && (dinfo->valid & ACPI_VALID_ADR) && | |
174 | dinfo->address == winfo->pcidevfn) { | |
175 | if (ata_msg_probe(winfo->ataport)) | |
176 | ata_dev_printk(winfo->atadev, KERN_DEBUG, | |
177 | ":%s: matches pcidevfn (0x%llx)\n", | |
178 | pathname, winfo->pcidevfn); | |
179 | strlcpy(winfo->basepath, pathname, | |
180 | sizeof(winfo->basepath)); | |
181 | winfo->basepath_len = strlen(pathname); | |
182 | goto out; | |
183 | } | |
184 | ||
185 | /* if basepath is not yet known, ignore this object */ | |
186 | if (!winfo->basepath_len) | |
187 | goto out; | |
188 | ||
189 | /* if this object is in scope of basepath, maybe use it */ | |
190 | if (strncmp(pathname, winfo->basepath, | |
191 | winfo->basepath_len) == 0) { | |
192 | if (!(dinfo->valid & ACPI_VALID_ADR)) | |
193 | goto out; | |
194 | if (ata_msg_probe(winfo->ataport)) | |
195 | ata_dev_printk(winfo->atadev, KERN_DEBUG, | |
196 | "GOT ONE: (%s) root_port = 0x%llx," | |
197 | " port_num = 0x%llx\n", pathname, | |
198 | SATA_ROOT_PORT(dinfo->address), | |
199 | SATA_PORT_NUMBER(dinfo->address)); | |
200 | /* heuristics: */ | |
201 | if (SATA_PORT_NUMBER(dinfo->address) != NO_PORT_MULT) | |
202 | if (ata_msg_probe(winfo->ataport)) | |
203 | ata_dev_printk(winfo->atadev, | |
204 | KERN_DEBUG, "warning: don't" | |
205 | " know how to handle SATA port" | |
206 | " multiplier\n"); | |
207 | if (SATA_ROOT_PORT(dinfo->address) == | |
208 | winfo->ataport->port_no && | |
209 | SATA_PORT_NUMBER(dinfo->address) == NO_PORT_MULT) { | |
210 | if (ata_msg_probe(winfo->ataport)) | |
211 | ata_dev_printk(winfo->atadev, | |
212 | KERN_DEBUG, | |
213 | "THIS ^^^^^ is the requested" | |
214 | " SATA drive (handle = 0x%p)\n", | |
215 | handle); | |
216 | winfo->sata_adr = dinfo->address; | |
217 | winfo->obj_handle = handle; | |
218 | } | |
219 | } | |
220 | out: | |
221 | kfree(dinfo); | |
222 | out2: | |
223 | kfree(pathname); | |
224 | ||
225 | ret: | |
226 | return status; | |
227 | } | |
228 | ||
229 | /* Get the SATA drive _ADR object. */ | |
230 | static int get_sata_adr(struct device *dev, acpi_handle handle, | |
231 | acpi_integer pcidevfn, unsigned int drive, | |
232 | struct ata_port *ap, | |
233 | struct ata_device *atadev, u32 *dev_adr) | |
234 | { | |
235 | acpi_status status; | |
236 | struct walk_info *winfo; | |
237 | int err = -ENOMEM; | |
238 | ||
239 | winfo = kzalloc(sizeof(struct walk_info), GFP_KERNEL); | |
240 | if (!winfo) | |
241 | goto out; | |
242 | ||
243 | winfo->dev = dev; | |
244 | winfo->atadev = atadev; | |
245 | winfo->ataport = ap; | |
246 | if (acpi_bus_get_device(handle, &winfo->adev) < 0) | |
247 | if (ata_msg_probe(ap)) | |
248 | ata_dev_printk(winfo->atadev, KERN_DEBUG, | |
249 | "acpi_bus_get_device failed\n"); | |
250 | winfo->handle = handle; | |
251 | winfo->pcidevfn = pcidevfn; | |
252 | winfo->drivenum = drive; | |
253 | ||
254 | status = acpi_get_devices(NULL, get_devices, winfo, NULL); | |
255 | if (ACPI_FAILURE(status)) { | |
256 | if (ata_msg_probe(ap)) | |
257 | ata_dev_printk(winfo->atadev, KERN_DEBUG, | |
258 | "%s: acpi_get_devices failed\n", | |
259 | __FUNCTION__); | |
260 | err = -ENODEV; | |
261 | } else { | |
262 | *dev_adr = winfo->sata_adr; | |
263 | atadev->obj_handle = winfo->obj_handle; | |
264 | err = 0; | |
265 | } | |
266 | kfree(winfo); | |
267 | out: | |
268 | return err; | |
269 | } | |
270 | ||
271 | /** | |
272 | * do_drive_get_GTF - get the drive bootup default taskfile settings | |
273 | * @ap: the ata_port for the drive | |
274 | * @ix: target ata_device (drive) index | |
275 | * @gtf_length: number of bytes of _GTF data returned at @gtf_address | |
276 | * @gtf_address: buffer containing _GTF taskfile arrays | |
277 | * | |
278 | * This applies to both PATA and SATA drives. | |
279 | * | |
280 | * The _GTF method has no input parameters. | |
281 | * It returns a variable number of register set values (registers | |
282 | * hex 1F1..1F7, taskfiles). | |
283 | * The <variable number> is not known in advance, so have ACPI-CA | |
284 | * allocate the buffer as needed and return it, then free it later. | |
285 | * | |
286 | * The returned @gtf_length and @gtf_address are only valid if the | |
287 | * function return value is 0. | |
288 | */ | |
289 | static int do_drive_get_GTF(struct ata_port *ap, int ix, | |
290 | unsigned int *gtf_length, unsigned long *gtf_address, | |
291 | unsigned long *obj_loc) | |
292 | { | |
293 | acpi_status status; | |
294 | acpi_handle dev_handle = NULL; | |
295 | acpi_handle chan_handle, drive_handle; | |
296 | acpi_integer pcidevfn = 0; | |
297 | u32 dev_adr; | |
298 | struct acpi_buffer output; | |
299 | union acpi_object *out_obj; | |
300 | struct device *dev = ap->host->dev; | |
301 | struct ata_device *atadev = &ap->device[ix]; | |
302 | int err = -ENODEV; | |
303 | ||
304 | *gtf_length = 0; | |
305 | *gtf_address = 0UL; | |
306 | *obj_loc = 0UL; | |
307 | ||
d7d0dad6 | 308 | if (libata_noacpi) |
11ef697b KCA |
309 | return 0; |
310 | ||
311 | if (ata_msg_probe(ap)) | |
878d4fed TH |
312 | ata_dev_printk(atadev, KERN_DEBUG, "%s: ENTER: port#: %d\n", |
313 | __FUNCTION__, ap->port_no); | |
11ef697b KCA |
314 | |
315 | if (!ata_dev_enabled(atadev) || (ap->flags & ATA_FLAG_DISABLED)) { | |
316 | if (ata_msg_probe(ap)) | |
317 | ata_dev_printk(atadev, KERN_DEBUG, "%s: ERR: " | |
318 | "ata_dev_present: %d, PORT_DISABLED: %lu\n", | |
319 | __FUNCTION__, ata_dev_enabled(atadev), | |
320 | ap->flags & ATA_FLAG_DISABLED); | |
321 | goto out; | |
322 | } | |
323 | ||
324 | /* Don't continue if device has no _ADR method. | |
325 | * _GTF is intended for known motherboard devices. */ | |
326 | if (!(ap->cbl == ATA_CBL_SATA)) { | |
327 | err = pata_get_dev_handle(dev, &dev_handle, &pcidevfn); | |
328 | if (err < 0) { | |
329 | if (ata_msg_probe(ap)) | |
330 | ata_dev_printk(atadev, KERN_DEBUG, | |
331 | "%s: pata_get_dev_handle failed (%d)\n", | |
332 | __FUNCTION__, err); | |
333 | goto out; | |
334 | } | |
335 | } else { | |
336 | err = sata_get_dev_handle(dev, &dev_handle, &pcidevfn); | |
337 | if (err < 0) { | |
338 | if (ata_msg_probe(ap)) | |
339 | ata_dev_printk(atadev, KERN_DEBUG, | |
340 | "%s: sata_get_dev_handle failed (%d\n", | |
341 | __FUNCTION__, err); | |
342 | goto out; | |
343 | } | |
344 | } | |
345 | ||
346 | /* Get this drive's _ADR info. if not already known. */ | |
347 | if (!atadev->obj_handle) { | |
348 | if (!(ap->cbl == ATA_CBL_SATA)) { | |
349 | /* get child objects of dev_handle == channel objects, | |
350 | * + _their_ children == drive objects */ | |
351 | /* channel is ap->port_no */ | |
352 | chan_handle = acpi_get_child(dev_handle, | |
353 | ap->port_no); | |
354 | if (ata_msg_probe(ap)) | |
355 | ata_dev_printk(atadev, KERN_DEBUG, | |
356 | "%s: chan adr=%d: chan_handle=0x%p\n", | |
357 | __FUNCTION__, ap->port_no, | |
358 | chan_handle); | |
359 | if (!chan_handle) { | |
360 | err = -ENODEV; | |
361 | goto out; | |
362 | } | |
363 | /* TBD: could also check ACPI object VALID bits */ | |
364 | drive_handle = acpi_get_child(chan_handle, ix); | |
365 | if (!drive_handle) { | |
366 | err = -ENODEV; | |
367 | goto out; | |
368 | } | |
369 | dev_adr = ix; | |
370 | atadev->obj_handle = drive_handle; | |
371 | } else { /* for SATA mode */ | |
372 | dev_adr = SATA_ADR_RSVD; | |
373 | err = get_sata_adr(dev, dev_handle, pcidevfn, 0, | |
374 | ap, atadev, &dev_adr); | |
375 | } | |
376 | if (err < 0 || dev_adr == SATA_ADR_RSVD || | |
377 | !atadev->obj_handle) { | |
378 | if (ata_msg_probe(ap)) | |
379 | ata_dev_printk(atadev, KERN_DEBUG, | |
380 | "%s: get_sata/pata_adr failed: " | |
381 | "err=%d, dev_adr=%u, obj_handle=0x%p\n", | |
382 | __FUNCTION__, err, dev_adr, | |
383 | atadev->obj_handle); | |
384 | goto out; | |
385 | } | |
386 | } | |
387 | ||
388 | /* Setting up output buffer */ | |
389 | output.length = ACPI_ALLOCATE_BUFFER; | |
390 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ | |
391 | ||
392 | /* _GTF has no input parameters */ | |
393 | err = -EIO; | |
394 | status = acpi_evaluate_object(atadev->obj_handle, "_GTF", | |
395 | NULL, &output); | |
396 | if (ACPI_FAILURE(status)) { | |
397 | if (ata_msg_probe(ap)) | |
398 | ata_dev_printk(atadev, KERN_DEBUG, | |
399 | "%s: Run _GTF error: status = 0x%x\n", | |
400 | __FUNCTION__, status); | |
401 | goto out; | |
402 | } | |
403 | ||
404 | if (!output.length || !output.pointer) { | |
405 | if (ata_msg_probe(ap)) | |
406 | ata_dev_printk(atadev, KERN_DEBUG, "%s: Run _GTF: " | |
407 | "length or ptr is NULL (0x%llx, 0x%p)\n", | |
408 | __FUNCTION__, | |
409 | (unsigned long long)output.length, | |
410 | output.pointer); | |
411 | kfree(output.pointer); | |
412 | goto out; | |
413 | } | |
414 | ||
415 | out_obj = output.pointer; | |
416 | if (out_obj->type != ACPI_TYPE_BUFFER) { | |
417 | kfree(output.pointer); | |
418 | if (ata_msg_probe(ap)) | |
419 | ata_dev_printk(atadev, KERN_DEBUG, "%s: Run _GTF: " | |
420 | "error: expected object type of " | |
421 | " ACPI_TYPE_BUFFER, got 0x%x\n", | |
422 | __FUNCTION__, out_obj->type); | |
423 | err = -ENOENT; | |
424 | goto out; | |
425 | } | |
426 | ||
427 | if (!out_obj->buffer.length || !out_obj->buffer.pointer || | |
428 | out_obj->buffer.length % REGS_PER_GTF) { | |
429 | if (ata_msg_drv(ap)) | |
430 | ata_dev_printk(atadev, KERN_ERR, | |
431 | "%s: unexpected GTF length (%d) or addr (0x%p)\n", | |
432 | __FUNCTION__, out_obj->buffer.length, | |
433 | out_obj->buffer.pointer); | |
434 | err = -ENOENT; | |
435 | goto out; | |
436 | } | |
437 | ||
438 | *gtf_length = out_obj->buffer.length; | |
439 | *gtf_address = (unsigned long)out_obj->buffer.pointer; | |
440 | *obj_loc = (unsigned long)out_obj; | |
441 | if (ata_msg_probe(ap)) | |
442 | ata_dev_printk(atadev, KERN_DEBUG, "%s: returning " | |
443 | "gtf_length=%d, gtf_address=0x%lx, obj_loc=0x%lx\n", | |
444 | __FUNCTION__, *gtf_length, *gtf_address, *obj_loc); | |
445 | err = 0; | |
446 | out: | |
447 | return err; | |
448 | } | |
449 | ||
450 | /** | |
451 | * taskfile_load_raw - send taskfile registers to host controller | |
452 | * @ap: Port to which output is sent | |
453 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) | |
454 | * | |
455 | * Outputs ATA taskfile to standard ATA host controller using MMIO | |
456 | * or PIO as indicated by the ATA_FLAG_MMIO flag. | |
457 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. | |
458 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, | |
459 | * hob_lbal, hob_lbam, and hob_lbah. | |
460 | * | |
461 | * This function waits for idle (!BUSY and !DRQ) after writing | |
462 | * registers. If the control register has a new value, this | |
463 | * function also waits for idle after writing control and before | |
464 | * writing the remaining registers. | |
465 | * | |
466 | * LOCKING: TBD: | |
467 | * Inherited from caller. | |
468 | */ | |
469 | static void taskfile_load_raw(struct ata_port *ap, | |
470 | struct ata_device *atadev, | |
471 | const struct taskfile_array *gtf) | |
472 | { | |
fc16c25f JG |
473 | struct ata_taskfile tf; |
474 | unsigned int err; | |
475 | ||
11ef697b KCA |
476 | if (ata_msg_probe(ap)) |
477 | ata_dev_printk(atadev, KERN_DEBUG, "%s: (0x1f1-1f7): hex: " | |
478 | "%02x %02x %02x %02x %02x %02x %02x\n", | |
479 | __FUNCTION__, | |
480 | gtf->tfa[0], gtf->tfa[1], gtf->tfa[2], | |
481 | gtf->tfa[3], gtf->tfa[4], gtf->tfa[5], gtf->tfa[6]); | |
482 | ||
483 | if ((gtf->tfa[0] == 0) && (gtf->tfa[1] == 0) && (gtf->tfa[2] == 0) | |
484 | && (gtf->tfa[3] == 0) && (gtf->tfa[4] == 0) && (gtf->tfa[5] == 0) | |
485 | && (gtf->tfa[6] == 0)) | |
486 | return; | |
487 | ||
fc16c25f JG |
488 | ata_tf_init(atadev, &tf); |
489 | ||
490 | /* convert gtf to tf */ | |
491 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; /* TBD */ | |
492 | tf.protocol = atadev->class == ATA_DEV_ATAPI ? | |
493 | ATA_PROT_ATAPI_NODATA : ATA_PROT_NODATA; | |
494 | tf.feature = gtf->tfa[0]; /* 0x1f1 */ | |
495 | tf.nsect = gtf->tfa[1]; /* 0x1f2 */ | |
496 | tf.lbal = gtf->tfa[2]; /* 0x1f3 */ | |
497 | tf.lbam = gtf->tfa[3]; /* 0x1f4 */ | |
498 | tf.lbah = gtf->tfa[4]; /* 0x1f5 */ | |
499 | tf.device = gtf->tfa[5]; /* 0x1f6 */ | |
500 | tf.command = gtf->tfa[6]; /* 0x1f7 */ | |
501 | ||
502 | err = ata_exec_internal(atadev, &tf, NULL, DMA_NONE, NULL, 0); | |
503 | if (err && ata_msg_probe(ap)) | |
504 | ata_dev_printk(atadev, KERN_ERR, | |
505 | "%s: ata_exec_internal failed: %u\n", | |
506 | __FUNCTION__, err); | |
11ef697b KCA |
507 | } |
508 | ||
509 | /** | |
510 | * do_drive_set_taskfiles - write the drive taskfile settings from _GTF | |
511 | * @ap: the ata_port for the drive | |
512 | * @atadev: target ata_device | |
513 | * @gtf_length: total number of bytes of _GTF taskfiles | |
514 | * @gtf_address: location of _GTF taskfile arrays | |
515 | * | |
516 | * This applies to both PATA and SATA drives. | |
517 | * | |
518 | * Write {gtf_address, length gtf_length} in groups of | |
519 | * REGS_PER_GTF bytes. | |
520 | */ | |
521 | static int do_drive_set_taskfiles(struct ata_port *ap, | |
522 | struct ata_device *atadev, unsigned int gtf_length, | |
523 | unsigned long gtf_address) | |
524 | { | |
525 | int err = -ENODEV; | |
526 | int gtf_count = gtf_length / REGS_PER_GTF; | |
527 | int ix; | |
528 | struct taskfile_array *gtf; | |
529 | ||
530 | if (ata_msg_probe(ap)) | |
878d4fed TH |
531 | ata_dev_printk(atadev, KERN_DEBUG, "%s: ENTER: port#: %d\n", |
532 | __FUNCTION__, ap->port_no); | |
11ef697b | 533 | |
d7d0dad6 | 534 | if (libata_noacpi || !(ap->cbl == ATA_CBL_SATA)) |
11ef697b KCA |
535 | return 0; |
536 | ||
537 | if (!ata_dev_enabled(atadev) || (ap->flags & ATA_FLAG_DISABLED)) | |
538 | goto out; | |
539 | if (!gtf_count) /* shouldn't be here */ | |
540 | goto out; | |
541 | ||
542 | if (gtf_length % REGS_PER_GTF) { | |
543 | if (ata_msg_drv(ap)) | |
544 | ata_dev_printk(atadev, KERN_ERR, | |
545 | "%s: unexpected GTF length (%d)\n", | |
546 | __FUNCTION__, gtf_length); | |
547 | goto out; | |
548 | } | |
549 | ||
550 | for (ix = 0; ix < gtf_count; ix++) { | |
551 | gtf = (struct taskfile_array *) | |
552 | (gtf_address + ix * REGS_PER_GTF); | |
553 | ||
554 | /* send all TaskFile registers (0x1f1-0x1f7) *in*that*order* */ | |
555 | taskfile_load_raw(ap, atadev, gtf); | |
556 | } | |
557 | ||
558 | err = 0; | |
559 | out: | |
560 | return err; | |
561 | } | |
562 | ||
563 | /** | |
564 | * ata_acpi_exec_tfs - get then write drive taskfile settings | |
565 | * @ap: the ata_port for the drive | |
566 | * | |
567 | * This applies to both PATA and SATA drives. | |
568 | */ | |
569 | int ata_acpi_exec_tfs(struct ata_port *ap) | |
570 | { | |
571 | int ix; | |
572 | int ret =0; | |
573 | unsigned int gtf_length; | |
574 | unsigned long gtf_address; | |
575 | unsigned long obj_loc; | |
576 | ||
d7d0dad6 | 577 | if (libata_noacpi) |
11ef697b | 578 | return 0; |
df33c77e KA |
579 | /* |
580 | * TBD - implement PATA support. For now, | |
581 | * we should not run GTF on PATA devices since some | |
582 | * PATA require execution of GTM/STM before GTF. | |
583 | */ | |
584 | if (!(ap->cbl == ATA_CBL_SATA)) | |
585 | return 0; | |
11ef697b KCA |
586 | |
587 | for (ix = 0; ix < ATA_MAX_DEVICES; ix++) { | |
588 | if (!ata_dev_enabled(&ap->device[ix])) | |
589 | continue; | |
590 | ||
591 | ret = do_drive_get_GTF(ap, ix, | |
592 | >f_length, >f_address, &obj_loc); | |
593 | if (ret < 0) { | |
594 | if (ata_msg_probe(ap)) | |
595 | ata_port_printk(ap, KERN_DEBUG, | |
596 | "%s: get_GTF error (%d)\n", | |
597 | __FUNCTION__, ret); | |
598 | break; | |
599 | } | |
600 | ||
601 | ret = do_drive_set_taskfiles(ap, &ap->device[ix], | |
602 | gtf_length, gtf_address); | |
603 | kfree((void *)obj_loc); | |
604 | if (ret < 0) { | |
605 | if (ata_msg_probe(ap)) | |
606 | ata_port_printk(ap, KERN_DEBUG, | |
607 | "%s: set_taskfiles error (%d)\n", | |
608 | __FUNCTION__, ret); | |
609 | break; | |
610 | } | |
611 | } | |
612 | ||
613 | return ret; | |
614 | } | |
615 | ||
7ea1fbc2 KCA |
616 | /** |
617 | * ata_acpi_push_id - send Identify data to drive | |
618 | * @ap: the ata_port for the drive | |
619 | * @ix: drive index | |
620 | * | |
621 | * _SDD ACPI object: for SATA mode only | |
622 | * Must be after Identify (Packet) Device -- uses its data | |
623 | * ATM this function never returns a failure. It is an optional | |
624 | * method and if it fails for whatever reason, we should still | |
625 | * just keep going. | |
626 | */ | |
627 | int ata_acpi_push_id(struct ata_port *ap, unsigned int ix) | |
628 | { | |
629 | acpi_handle handle; | |
630 | acpi_integer pcidevfn; | |
631 | int err; | |
632 | struct device *dev = ap->host->dev; | |
633 | struct ata_device *atadev = &ap->device[ix]; | |
634 | u32 dev_adr; | |
635 | acpi_status status; | |
636 | struct acpi_object_list input; | |
637 | union acpi_object in_params[1]; | |
638 | ||
d7d0dad6 | 639 | if (libata_noacpi) |
7ea1fbc2 KCA |
640 | return 0; |
641 | ||
642 | if (ata_msg_probe(ap)) | |
878d4fed TH |
643 | ata_dev_printk(atadev, KERN_DEBUG, "%s: ix = %d, port#: %d\n", |
644 | __FUNCTION__, ix, ap->port_no); | |
7ea1fbc2 KCA |
645 | |
646 | /* Don't continue if not a SATA device. */ | |
647 | if (!(ap->cbl == ATA_CBL_SATA)) { | |
648 | if (ata_msg_probe(ap)) | |
649 | ata_dev_printk(atadev, KERN_DEBUG, | |
650 | "%s: Not a SATA device\n", __FUNCTION__); | |
651 | goto out; | |
652 | } | |
653 | ||
654 | /* Don't continue if device has no _ADR method. | |
655 | * _SDD is intended for known motherboard devices. */ | |
656 | err = sata_get_dev_handle(dev, &handle, &pcidevfn); | |
657 | if (err < 0) { | |
658 | if (ata_msg_probe(ap)) | |
659 | ata_dev_printk(atadev, KERN_DEBUG, | |
660 | "%s: sata_get_dev_handle failed (%d\n", | |
661 | __FUNCTION__, err); | |
662 | goto out; | |
663 | } | |
664 | ||
665 | /* Get this drive's _ADR info, if not already known */ | |
666 | if (!atadev->obj_handle) { | |
667 | dev_adr = SATA_ADR_RSVD; | |
668 | err = get_sata_adr(dev, handle, pcidevfn, ix, ap, atadev, | |
669 | &dev_adr); | |
670 | if (err < 0 || dev_adr == SATA_ADR_RSVD || | |
671 | !atadev->obj_handle) { | |
672 | if (ata_msg_probe(ap)) | |
673 | ata_dev_printk(atadev, KERN_DEBUG, | |
674 | "%s: get_sata_adr failed: " | |
675 | "err=%d, dev_adr=%u, obj_handle=0x%p\n", | |
676 | __FUNCTION__, err, dev_adr, | |
677 | atadev->obj_handle); | |
678 | goto out; | |
679 | } | |
680 | } | |
681 | ||
682 | /* Give the drive Identify data to the drive via the _SDD method */ | |
683 | /* _SDD: set up input parameters */ | |
684 | input.count = 1; | |
685 | input.pointer = in_params; | |
686 | in_params[0].type = ACPI_TYPE_BUFFER; | |
9de1cc9c | 687 | in_params[0].buffer.length = sizeof(atadev->id[0]) * ATA_ID_WORDS; |
7ea1fbc2 KCA |
688 | in_params[0].buffer.pointer = (u8 *)atadev->id; |
689 | /* Output buffer: _SDD has no output */ | |
690 | ||
691 | /* It's OK for _SDD to be missing too. */ | |
692 | swap_buf_le16(atadev->id, ATA_ID_WORDS); | |
693 | status = acpi_evaluate_object(atadev->obj_handle, "_SDD", &input, NULL); | |
694 | swap_buf_le16(atadev->id, ATA_ID_WORDS); | |
695 | ||
696 | err = ACPI_FAILURE(status) ? -EIO : 0; | |
697 | if (err < 0) { | |
698 | if (ata_msg_probe(ap)) | |
699 | ata_dev_printk(atadev, KERN_DEBUG, | |
878d4fed TH |
700 | "%s _SDD error: status = 0x%x\n", |
701 | __FUNCTION__, status); | |
7ea1fbc2 KCA |
702 | } |
703 | ||
704 | /* always return success */ | |
705 | out: | |
706 | return 0; | |
707 | } | |
708 | ||
709 |