Kristen Carlson Accardi | 11ef697 | 2006-09-28 11:29:01 -0700 | [diff] [blame] | 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 | |
| 37 | |
| 38 | /** |
| 39 | * sata_get_dev_handle - finds acpi_handle and PCI device.function |
| 40 | * @dev: device to locate |
| 41 | * @handle: returned acpi_handle for @dev |
| 42 | * @pcidevfn: return PCI device.func for @dev |
| 43 | * |
| 44 | * This function is somewhat SATA-specific. Or at least the |
| 45 | * PATA & SATA versions of this function are different, |
| 46 | * so it's not entirely generic code. |
| 47 | * |
| 48 | * Returns 0 on success, <0 on error. |
| 49 | */ |
| 50 | static int sata_get_dev_handle(struct device *dev, acpi_handle *handle, |
| 51 | acpi_integer *pcidevfn) |
| 52 | { |
| 53 | struct pci_dev *pci_dev; |
| 54 | acpi_integer addr; |
| 55 | |
| 56 | pci_dev = to_pci_dev(dev); /* NOTE: PCI-specific */ |
| 57 | /* Please refer to the ACPI spec for the syntax of _ADR. */ |
| 58 | addr = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn); |
| 59 | *pcidevfn = addr; |
| 60 | *handle = acpi_get_child(DEVICE_ACPI_HANDLE(dev->parent), addr); |
| 61 | if (!*handle) |
| 62 | return -ENODEV; |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * pata_get_dev_handle - finds acpi_handle and PCI device.function |
| 68 | * @dev: device to locate |
| 69 | * @handle: returned acpi_handle for @dev |
| 70 | * @pcidevfn: return PCI device.func for @dev |
| 71 | * |
| 72 | * The PATA and SATA versions of this function are different. |
| 73 | * |
| 74 | * Returns 0 on success, <0 on error. |
| 75 | */ |
| 76 | static int pata_get_dev_handle(struct device *dev, acpi_handle *handle, |
| 77 | acpi_integer *pcidevfn) |
| 78 | { |
| 79 | unsigned int bus, devnum, func; |
| 80 | acpi_integer addr; |
| 81 | acpi_handle dev_handle, parent_handle; |
| 82 | struct acpi_buffer buffer = {.length = ACPI_ALLOCATE_BUFFER, |
| 83 | .pointer = NULL}; |
| 84 | acpi_status status; |
| 85 | struct acpi_device_info *dinfo = NULL; |
| 86 | int ret = -ENODEV; |
| 87 | struct pci_dev *pdev = to_pci_dev(dev); |
| 88 | |
| 89 | bus = pdev->bus->number; |
| 90 | devnum = PCI_SLOT(pdev->devfn); |
| 91 | func = PCI_FUNC(pdev->devfn); |
| 92 | |
| 93 | dev_handle = DEVICE_ACPI_HANDLE(dev); |
| 94 | parent_handle = DEVICE_ACPI_HANDLE(dev->parent); |
| 95 | |
| 96 | status = acpi_get_object_info(parent_handle, &buffer); |
| 97 | if (ACPI_FAILURE(status)) |
| 98 | goto err; |
| 99 | |
| 100 | dinfo = buffer.pointer; |
| 101 | if (dinfo && (dinfo->valid & ACPI_VALID_ADR) && |
| 102 | dinfo->address == bus) { |
| 103 | /* ACPI spec for _ADR for PCI bus: */ |
| 104 | addr = (acpi_integer)(devnum << 16 | func); |
| 105 | *pcidevfn = addr; |
| 106 | *handle = dev_handle; |
| 107 | } else { |
| 108 | goto err; |
| 109 | } |
| 110 | |
| 111 | if (!*handle) |
| 112 | goto err; |
| 113 | ret = 0; |
| 114 | err: |
| 115 | kfree(dinfo); |
| 116 | return ret; |
| 117 | } |
| 118 | |
| 119 | struct walk_info { /* can be trimmed some */ |
| 120 | struct device *dev; |
| 121 | struct acpi_device *adev; |
| 122 | acpi_handle handle; |
| 123 | acpi_integer pcidevfn; |
| 124 | unsigned int drivenum; |
| 125 | acpi_handle obj_handle; |
| 126 | struct ata_port *ataport; |
| 127 | struct ata_device *atadev; |
| 128 | u32 sata_adr; |
| 129 | int status; |
| 130 | char basepath[ACPI_PATHNAME_MAX]; |
| 131 | int basepath_len; |
| 132 | }; |
| 133 | |
| 134 | static acpi_status get_devices(acpi_handle handle, |
| 135 | u32 level, void *context, void **return_value) |
| 136 | { |
| 137 | acpi_status status; |
| 138 | struct walk_info *winfo = context; |
| 139 | struct acpi_buffer namebuf = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 140 | char *pathname; |
| 141 | struct acpi_buffer buffer; |
| 142 | struct acpi_device_info *dinfo; |
| 143 | |
| 144 | status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &namebuf); |
| 145 | if (status) |
| 146 | goto ret; |
| 147 | pathname = namebuf.pointer; |
| 148 | |
| 149 | buffer.length = ACPI_ALLOCATE_BUFFER; |
| 150 | buffer.pointer = NULL; |
| 151 | status = acpi_get_object_info(handle, &buffer); |
| 152 | if (ACPI_FAILURE(status)) |
| 153 | goto out2; |
| 154 | |
| 155 | dinfo = buffer.pointer; |
| 156 | |
| 157 | /* find full device path name for pcidevfn */ |
| 158 | if (dinfo && (dinfo->valid & ACPI_VALID_ADR) && |
| 159 | dinfo->address == winfo->pcidevfn) { |
| 160 | if (ata_msg_probe(winfo->ataport)) |
| 161 | ata_dev_printk(winfo->atadev, KERN_DEBUG, |
| 162 | ":%s: matches pcidevfn (0x%llx)\n", |
| 163 | pathname, winfo->pcidevfn); |
| 164 | strlcpy(winfo->basepath, pathname, |
| 165 | sizeof(winfo->basepath)); |
| 166 | winfo->basepath_len = strlen(pathname); |
| 167 | goto out; |
| 168 | } |
| 169 | |
| 170 | /* if basepath is not yet known, ignore this object */ |
| 171 | if (!winfo->basepath_len) |
| 172 | goto out; |
| 173 | |
| 174 | /* if this object is in scope of basepath, maybe use it */ |
| 175 | if (strncmp(pathname, winfo->basepath, |
| 176 | winfo->basepath_len) == 0) { |
| 177 | if (!(dinfo->valid & ACPI_VALID_ADR)) |
| 178 | goto out; |
| 179 | if (ata_msg_probe(winfo->ataport)) |
| 180 | ata_dev_printk(winfo->atadev, KERN_DEBUG, |
| 181 | "GOT ONE: (%s) root_port = 0x%llx," |
| 182 | " port_num = 0x%llx\n", pathname, |
| 183 | SATA_ROOT_PORT(dinfo->address), |
| 184 | SATA_PORT_NUMBER(dinfo->address)); |
| 185 | /* heuristics: */ |
| 186 | if (SATA_PORT_NUMBER(dinfo->address) != NO_PORT_MULT) |
| 187 | if (ata_msg_probe(winfo->ataport)) |
| 188 | ata_dev_printk(winfo->atadev, |
| 189 | KERN_DEBUG, "warning: don't" |
| 190 | " know how to handle SATA port" |
| 191 | " multiplier\n"); |
| 192 | if (SATA_ROOT_PORT(dinfo->address) == |
| 193 | winfo->ataport->port_no && |
| 194 | SATA_PORT_NUMBER(dinfo->address) == NO_PORT_MULT) { |
| 195 | if (ata_msg_probe(winfo->ataport)) |
| 196 | ata_dev_printk(winfo->atadev, |
| 197 | KERN_DEBUG, |
| 198 | "THIS ^^^^^ is the requested" |
| 199 | " SATA drive (handle = 0x%p)\n", |
| 200 | handle); |
| 201 | winfo->sata_adr = dinfo->address; |
| 202 | winfo->obj_handle = handle; |
| 203 | } |
| 204 | } |
| 205 | out: |
| 206 | kfree(dinfo); |
| 207 | out2: |
| 208 | kfree(pathname); |
| 209 | |
| 210 | ret: |
| 211 | return status; |
| 212 | } |
| 213 | |
| 214 | /* Get the SATA drive _ADR object. */ |
| 215 | static int get_sata_adr(struct device *dev, acpi_handle handle, |
| 216 | acpi_integer pcidevfn, unsigned int drive, |
| 217 | struct ata_port *ap, |
| 218 | struct ata_device *atadev, u32 *dev_adr) |
| 219 | { |
| 220 | acpi_status status; |
| 221 | struct walk_info *winfo; |
| 222 | int err = -ENOMEM; |
| 223 | |
| 224 | winfo = kzalloc(sizeof(struct walk_info), GFP_KERNEL); |
| 225 | if (!winfo) |
| 226 | goto out; |
| 227 | |
| 228 | winfo->dev = dev; |
| 229 | winfo->atadev = atadev; |
| 230 | winfo->ataport = ap; |
| 231 | if (acpi_bus_get_device(handle, &winfo->adev) < 0) |
| 232 | if (ata_msg_probe(ap)) |
| 233 | ata_dev_printk(winfo->atadev, KERN_DEBUG, |
| 234 | "acpi_bus_get_device failed\n"); |
| 235 | winfo->handle = handle; |
| 236 | winfo->pcidevfn = pcidevfn; |
| 237 | winfo->drivenum = drive; |
| 238 | |
| 239 | status = acpi_get_devices(NULL, get_devices, winfo, NULL); |
| 240 | if (ACPI_FAILURE(status)) { |
| 241 | if (ata_msg_probe(ap)) |
| 242 | ata_dev_printk(winfo->atadev, KERN_DEBUG, |
| 243 | "%s: acpi_get_devices failed\n", |
| 244 | __FUNCTION__); |
| 245 | err = -ENODEV; |
| 246 | } else { |
| 247 | *dev_adr = winfo->sata_adr; |
| 248 | atadev->obj_handle = winfo->obj_handle; |
| 249 | err = 0; |
| 250 | } |
| 251 | kfree(winfo); |
| 252 | out: |
| 253 | return err; |
| 254 | } |
| 255 | |
| 256 | /** |
| 257 | * do_drive_get_GTF - get the drive bootup default taskfile settings |
| 258 | * @ap: the ata_port for the drive |
| 259 | * @ix: target ata_device (drive) index |
| 260 | * @gtf_length: number of bytes of _GTF data returned at @gtf_address |
| 261 | * @gtf_address: buffer containing _GTF taskfile arrays |
| 262 | * |
| 263 | * This applies to both PATA and SATA drives. |
| 264 | * |
| 265 | * The _GTF method has no input parameters. |
| 266 | * It returns a variable number of register set values (registers |
| 267 | * hex 1F1..1F7, taskfiles). |
| 268 | * The <variable number> is not known in advance, so have ACPI-CA |
| 269 | * allocate the buffer as needed and return it, then free it later. |
| 270 | * |
| 271 | * The returned @gtf_length and @gtf_address are only valid if the |
| 272 | * function return value is 0. |
| 273 | */ |
| 274 | static int do_drive_get_GTF(struct ata_port *ap, int ix, |
| 275 | unsigned int *gtf_length, unsigned long *gtf_address, |
| 276 | unsigned long *obj_loc) |
| 277 | { |
| 278 | acpi_status status; |
| 279 | acpi_handle dev_handle = NULL; |
| 280 | acpi_handle chan_handle, drive_handle; |
| 281 | acpi_integer pcidevfn = 0; |
| 282 | u32 dev_adr; |
| 283 | struct acpi_buffer output; |
| 284 | union acpi_object *out_obj; |
| 285 | struct device *dev = ap->host->dev; |
| 286 | struct ata_device *atadev = &ap->device[ix]; |
| 287 | int err = -ENODEV; |
| 288 | |
| 289 | *gtf_length = 0; |
| 290 | *gtf_address = 0UL; |
| 291 | *obj_loc = 0UL; |
| 292 | |
| 293 | if (noacpi) |
| 294 | return 0; |
| 295 | |
| 296 | if (ata_msg_probe(ap)) |
| 297 | ata_dev_printk(atadev, KERN_DEBUG, |
| 298 | "%s: ENTER: ap->id: %d, port#: %d\n", |
| 299 | __FUNCTION__, ap->id, ap->port_no); |
| 300 | |
| 301 | if (!ata_dev_enabled(atadev) || (ap->flags & ATA_FLAG_DISABLED)) { |
| 302 | if (ata_msg_probe(ap)) |
| 303 | ata_dev_printk(atadev, KERN_DEBUG, "%s: ERR: " |
| 304 | "ata_dev_present: %d, PORT_DISABLED: %lu\n", |
| 305 | __FUNCTION__, ata_dev_enabled(atadev), |
| 306 | ap->flags & ATA_FLAG_DISABLED); |
| 307 | goto out; |
| 308 | } |
| 309 | |
| 310 | /* Don't continue if device has no _ADR method. |
| 311 | * _GTF is intended for known motherboard devices. */ |
| 312 | if (!(ap->cbl == ATA_CBL_SATA)) { |
| 313 | err = pata_get_dev_handle(dev, &dev_handle, &pcidevfn); |
| 314 | if (err < 0) { |
| 315 | if (ata_msg_probe(ap)) |
| 316 | ata_dev_printk(atadev, KERN_DEBUG, |
| 317 | "%s: pata_get_dev_handle failed (%d)\n", |
| 318 | __FUNCTION__, err); |
| 319 | goto out; |
| 320 | } |
| 321 | } else { |
| 322 | err = sata_get_dev_handle(dev, &dev_handle, &pcidevfn); |
| 323 | if (err < 0) { |
| 324 | if (ata_msg_probe(ap)) |
| 325 | ata_dev_printk(atadev, KERN_DEBUG, |
| 326 | "%s: sata_get_dev_handle failed (%d\n", |
| 327 | __FUNCTION__, err); |
| 328 | goto out; |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | /* Get this drive's _ADR info. if not already known. */ |
| 333 | if (!atadev->obj_handle) { |
| 334 | if (!(ap->cbl == ATA_CBL_SATA)) { |
| 335 | /* get child objects of dev_handle == channel objects, |
| 336 | * + _their_ children == drive objects */ |
| 337 | /* channel is ap->port_no */ |
| 338 | chan_handle = acpi_get_child(dev_handle, |
| 339 | ap->port_no); |
| 340 | if (ata_msg_probe(ap)) |
| 341 | ata_dev_printk(atadev, KERN_DEBUG, |
| 342 | "%s: chan adr=%d: chan_handle=0x%p\n", |
| 343 | __FUNCTION__, ap->port_no, |
| 344 | chan_handle); |
| 345 | if (!chan_handle) { |
| 346 | err = -ENODEV; |
| 347 | goto out; |
| 348 | } |
| 349 | /* TBD: could also check ACPI object VALID bits */ |
| 350 | drive_handle = acpi_get_child(chan_handle, ix); |
| 351 | if (!drive_handle) { |
| 352 | err = -ENODEV; |
| 353 | goto out; |
| 354 | } |
| 355 | dev_adr = ix; |
| 356 | atadev->obj_handle = drive_handle; |
| 357 | } else { /* for SATA mode */ |
| 358 | dev_adr = SATA_ADR_RSVD; |
| 359 | err = get_sata_adr(dev, dev_handle, pcidevfn, 0, |
| 360 | ap, atadev, &dev_adr); |
| 361 | } |
| 362 | if (err < 0 || dev_adr == SATA_ADR_RSVD || |
| 363 | !atadev->obj_handle) { |
| 364 | if (ata_msg_probe(ap)) |
| 365 | ata_dev_printk(atadev, KERN_DEBUG, |
| 366 | "%s: get_sata/pata_adr failed: " |
| 367 | "err=%d, dev_adr=%u, obj_handle=0x%p\n", |
| 368 | __FUNCTION__, err, dev_adr, |
| 369 | atadev->obj_handle); |
| 370 | goto out; |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | /* Setting up output buffer */ |
| 375 | output.length = ACPI_ALLOCATE_BUFFER; |
| 376 | output.pointer = NULL; /* ACPI-CA sets this; save/free it later */ |
| 377 | |
| 378 | /* _GTF has no input parameters */ |
| 379 | err = -EIO; |
| 380 | status = acpi_evaluate_object(atadev->obj_handle, "_GTF", |
| 381 | NULL, &output); |
| 382 | if (ACPI_FAILURE(status)) { |
| 383 | if (ata_msg_probe(ap)) |
| 384 | ata_dev_printk(atadev, KERN_DEBUG, |
| 385 | "%s: Run _GTF error: status = 0x%x\n", |
| 386 | __FUNCTION__, status); |
| 387 | goto out; |
| 388 | } |
| 389 | |
| 390 | if (!output.length || !output.pointer) { |
| 391 | if (ata_msg_probe(ap)) |
| 392 | ata_dev_printk(atadev, KERN_DEBUG, "%s: Run _GTF: " |
| 393 | "length or ptr is NULL (0x%llx, 0x%p)\n", |
| 394 | __FUNCTION__, |
| 395 | (unsigned long long)output.length, |
| 396 | output.pointer); |
| 397 | kfree(output.pointer); |
| 398 | goto out; |
| 399 | } |
| 400 | |
| 401 | out_obj = output.pointer; |
| 402 | if (out_obj->type != ACPI_TYPE_BUFFER) { |
| 403 | kfree(output.pointer); |
| 404 | if (ata_msg_probe(ap)) |
| 405 | ata_dev_printk(atadev, KERN_DEBUG, "%s: Run _GTF: " |
| 406 | "error: expected object type of " |
| 407 | " ACPI_TYPE_BUFFER, got 0x%x\n", |
| 408 | __FUNCTION__, out_obj->type); |
| 409 | err = -ENOENT; |
| 410 | goto out; |
| 411 | } |
| 412 | |
| 413 | if (!out_obj->buffer.length || !out_obj->buffer.pointer || |
| 414 | out_obj->buffer.length % REGS_PER_GTF) { |
| 415 | if (ata_msg_drv(ap)) |
| 416 | ata_dev_printk(atadev, KERN_ERR, |
| 417 | "%s: unexpected GTF length (%d) or addr (0x%p)\n", |
| 418 | __FUNCTION__, out_obj->buffer.length, |
| 419 | out_obj->buffer.pointer); |
| 420 | err = -ENOENT; |
| 421 | goto out; |
| 422 | } |
| 423 | |
| 424 | *gtf_length = out_obj->buffer.length; |
| 425 | *gtf_address = (unsigned long)out_obj->buffer.pointer; |
| 426 | *obj_loc = (unsigned long)out_obj; |
| 427 | if (ata_msg_probe(ap)) |
| 428 | ata_dev_printk(atadev, KERN_DEBUG, "%s: returning " |
| 429 | "gtf_length=%d, gtf_address=0x%lx, obj_loc=0x%lx\n", |
| 430 | __FUNCTION__, *gtf_length, *gtf_address, *obj_loc); |
| 431 | err = 0; |
| 432 | out: |
| 433 | return err; |
| 434 | } |
| 435 | |
| 436 | /** |
| 437 | * taskfile_load_raw - send taskfile registers to host controller |
| 438 | * @ap: Port to which output is sent |
| 439 | * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7) |
| 440 | * |
| 441 | * Outputs ATA taskfile to standard ATA host controller using MMIO |
| 442 | * or PIO as indicated by the ATA_FLAG_MMIO flag. |
| 443 | * Writes the control, feature, nsect, lbal, lbam, and lbah registers. |
| 444 | * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect, |
| 445 | * hob_lbal, hob_lbam, and hob_lbah. |
| 446 | * |
| 447 | * This function waits for idle (!BUSY and !DRQ) after writing |
| 448 | * registers. If the control register has a new value, this |
| 449 | * function also waits for idle after writing control and before |
| 450 | * writing the remaining registers. |
| 451 | * |
| 452 | * LOCKING: TBD: |
| 453 | * Inherited from caller. |
| 454 | */ |
| 455 | static void taskfile_load_raw(struct ata_port *ap, |
| 456 | struct ata_device *atadev, |
| 457 | const struct taskfile_array *gtf) |
| 458 | { |
| 459 | if (ata_msg_probe(ap)) |
| 460 | ata_dev_printk(atadev, KERN_DEBUG, "%s: (0x1f1-1f7): hex: " |
| 461 | "%02x %02x %02x %02x %02x %02x %02x\n", |
| 462 | __FUNCTION__, |
| 463 | gtf->tfa[0], gtf->tfa[1], gtf->tfa[2], |
| 464 | gtf->tfa[3], gtf->tfa[4], gtf->tfa[5], gtf->tfa[6]); |
| 465 | |
| 466 | if ((gtf->tfa[0] == 0) && (gtf->tfa[1] == 0) && (gtf->tfa[2] == 0) |
| 467 | && (gtf->tfa[3] == 0) && (gtf->tfa[4] == 0) && (gtf->tfa[5] == 0) |
| 468 | && (gtf->tfa[6] == 0)) |
| 469 | return; |
| 470 | |
| 471 | if (ap->ops->qc_issue) { |
| 472 | struct ata_taskfile tf; |
| 473 | unsigned int err; |
| 474 | |
| 475 | ata_tf_init(atadev, &tf); |
| 476 | |
| 477 | /* convert gtf to tf */ |
| 478 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; /* TBD */ |
| 479 | tf.protocol = atadev->class == ATA_DEV_ATAPI ? |
| 480 | ATA_PROT_ATAPI_NODATA : ATA_PROT_NODATA; |
| 481 | tf.feature = gtf->tfa[0]; /* 0x1f1 */ |
| 482 | tf.nsect = gtf->tfa[1]; /* 0x1f2 */ |
| 483 | tf.lbal = gtf->tfa[2]; /* 0x1f3 */ |
| 484 | tf.lbam = gtf->tfa[3]; /* 0x1f4 */ |
| 485 | tf.lbah = gtf->tfa[4]; /* 0x1f5 */ |
| 486 | tf.device = gtf->tfa[5]; /* 0x1f6 */ |
| 487 | tf.command = gtf->tfa[6]; /* 0x1f7 */ |
| 488 | |
| 489 | err = ata_exec_internal(atadev, &tf, NULL, DMA_NONE, NULL, 0); |
| 490 | if (err && ata_msg_probe(ap)) |
| 491 | ata_dev_printk(atadev, KERN_ERR, |
| 492 | "%s: ata_exec_internal failed: %u\n", |
| 493 | __FUNCTION__, err); |
| 494 | } else |
| 495 | if (ata_msg_warn(ap)) |
| 496 | ata_dev_printk(atadev, KERN_WARNING, |
| 497 | "%s: SATA driver is missing qc_issue function" |
| 498 | " entry points\n", |
| 499 | __FUNCTION__); |
| 500 | } |
| 501 | |
| 502 | /** |
| 503 | * do_drive_set_taskfiles - write the drive taskfile settings from _GTF |
| 504 | * @ap: the ata_port for the drive |
| 505 | * @atadev: target ata_device |
| 506 | * @gtf_length: total number of bytes of _GTF taskfiles |
| 507 | * @gtf_address: location of _GTF taskfile arrays |
| 508 | * |
| 509 | * This applies to both PATA and SATA drives. |
| 510 | * |
| 511 | * Write {gtf_address, length gtf_length} in groups of |
| 512 | * REGS_PER_GTF bytes. |
| 513 | */ |
| 514 | static int do_drive_set_taskfiles(struct ata_port *ap, |
| 515 | struct ata_device *atadev, unsigned int gtf_length, |
| 516 | unsigned long gtf_address) |
| 517 | { |
| 518 | int err = -ENODEV; |
| 519 | int gtf_count = gtf_length / REGS_PER_GTF; |
| 520 | int ix; |
| 521 | struct taskfile_array *gtf; |
| 522 | |
| 523 | if (ata_msg_probe(ap)) |
| 524 | ata_dev_printk(atadev, KERN_DEBUG, |
| 525 | "%s: ENTER: ap->id: %d, port#: %d\n", |
| 526 | __FUNCTION__, ap->id, ap->port_no); |
| 527 | |
| 528 | if (noacpi || !(ap->cbl == ATA_CBL_SATA)) |
| 529 | return 0; |
| 530 | |
| 531 | if (!ata_dev_enabled(atadev) || (ap->flags & ATA_FLAG_DISABLED)) |
| 532 | goto out; |
| 533 | if (!gtf_count) /* shouldn't be here */ |
| 534 | goto out; |
| 535 | |
| 536 | if (gtf_length % REGS_PER_GTF) { |
| 537 | if (ata_msg_drv(ap)) |
| 538 | ata_dev_printk(atadev, KERN_ERR, |
| 539 | "%s: unexpected GTF length (%d)\n", |
| 540 | __FUNCTION__, gtf_length); |
| 541 | goto out; |
| 542 | } |
| 543 | |
| 544 | for (ix = 0; ix < gtf_count; ix++) { |
| 545 | gtf = (struct taskfile_array *) |
| 546 | (gtf_address + ix * REGS_PER_GTF); |
| 547 | |
| 548 | /* send all TaskFile registers (0x1f1-0x1f7) *in*that*order* */ |
| 549 | taskfile_load_raw(ap, atadev, gtf); |
| 550 | } |
| 551 | |
| 552 | err = 0; |
| 553 | out: |
| 554 | return err; |
| 555 | } |
| 556 | |
| 557 | /** |
| 558 | * ata_acpi_exec_tfs - get then write drive taskfile settings |
| 559 | * @ap: the ata_port for the drive |
| 560 | * |
| 561 | * This applies to both PATA and SATA drives. |
| 562 | */ |
| 563 | int ata_acpi_exec_tfs(struct ata_port *ap) |
| 564 | { |
| 565 | int ix; |
| 566 | int ret =0; |
| 567 | unsigned int gtf_length; |
| 568 | unsigned long gtf_address; |
| 569 | unsigned long obj_loc; |
| 570 | |
| 571 | if (noacpi) |
| 572 | return 0; |
| 573 | |
| 574 | for (ix = 0; ix < ATA_MAX_DEVICES; ix++) { |
| 575 | if (!ata_dev_enabled(&ap->device[ix])) |
| 576 | continue; |
| 577 | |
| 578 | ret = do_drive_get_GTF(ap, ix, |
| 579 | >f_length, >f_address, &obj_loc); |
| 580 | if (ret < 0) { |
| 581 | if (ata_msg_probe(ap)) |
| 582 | ata_port_printk(ap, KERN_DEBUG, |
| 583 | "%s: get_GTF error (%d)\n", |
| 584 | __FUNCTION__, ret); |
| 585 | break; |
| 586 | } |
| 587 | |
| 588 | ret = do_drive_set_taskfiles(ap, &ap->device[ix], |
| 589 | gtf_length, gtf_address); |
| 590 | kfree((void *)obj_loc); |
| 591 | if (ret < 0) { |
| 592 | if (ata_msg_probe(ap)) |
| 593 | ata_port_printk(ap, KERN_DEBUG, |
| 594 | "%s: set_taskfiles error (%d)\n", |
| 595 | __FUNCTION__, ret); |
| 596 | break; |
| 597 | } |
| 598 | } |
| 599 | |
| 600 | return ret; |
| 601 | } |
| 602 | |
Kristen Carlson Accardi | 7ea1fbc | 2006-09-28 11:29:12 -0700 | [diff] [blame] | 603 | /** |
| 604 | * ata_acpi_push_id - send Identify data to drive |
| 605 | * @ap: the ata_port for the drive |
| 606 | * @ix: drive index |
| 607 | * |
| 608 | * _SDD ACPI object: for SATA mode only |
| 609 | * Must be after Identify (Packet) Device -- uses its data |
| 610 | * ATM this function never returns a failure. It is an optional |
| 611 | * method and if it fails for whatever reason, we should still |
| 612 | * just keep going. |
| 613 | */ |
| 614 | int ata_acpi_push_id(struct ata_port *ap, unsigned int ix) |
| 615 | { |
| 616 | acpi_handle handle; |
| 617 | acpi_integer pcidevfn; |
| 618 | int err; |
| 619 | struct device *dev = ap->host->dev; |
| 620 | struct ata_device *atadev = &ap->device[ix]; |
| 621 | u32 dev_adr; |
| 622 | acpi_status status; |
| 623 | struct acpi_object_list input; |
| 624 | union acpi_object in_params[1]; |
| 625 | |
| 626 | if (noacpi) |
| 627 | return 0; |
| 628 | |
| 629 | if (ata_msg_probe(ap)) |
| 630 | ata_dev_printk(atadev, KERN_DEBUG, |
| 631 | "%s: ap->id: %d, ix = %d, port#: %d\n", |
| 632 | __FUNCTION__, ap->id, ix, ap->port_no); |
| 633 | |
| 634 | /* Don't continue if not a SATA device. */ |
| 635 | if (!(ap->cbl == ATA_CBL_SATA)) { |
| 636 | if (ata_msg_probe(ap)) |
| 637 | ata_dev_printk(atadev, KERN_DEBUG, |
| 638 | "%s: Not a SATA device\n", __FUNCTION__); |
| 639 | goto out; |
| 640 | } |
| 641 | |
| 642 | /* Don't continue if device has no _ADR method. |
| 643 | * _SDD is intended for known motherboard devices. */ |
| 644 | err = sata_get_dev_handle(dev, &handle, &pcidevfn); |
| 645 | if (err < 0) { |
| 646 | if (ata_msg_probe(ap)) |
| 647 | ata_dev_printk(atadev, KERN_DEBUG, |
| 648 | "%s: sata_get_dev_handle failed (%d\n", |
| 649 | __FUNCTION__, err); |
| 650 | goto out; |
| 651 | } |
| 652 | |
| 653 | /* Get this drive's _ADR info, if not already known */ |
| 654 | if (!atadev->obj_handle) { |
| 655 | dev_adr = SATA_ADR_RSVD; |
| 656 | err = get_sata_adr(dev, handle, pcidevfn, ix, ap, atadev, |
| 657 | &dev_adr); |
| 658 | if (err < 0 || dev_adr == SATA_ADR_RSVD || |
| 659 | !atadev->obj_handle) { |
| 660 | if (ata_msg_probe(ap)) |
| 661 | ata_dev_printk(atadev, KERN_DEBUG, |
| 662 | "%s: get_sata_adr failed: " |
| 663 | "err=%d, dev_adr=%u, obj_handle=0x%p\n", |
| 664 | __FUNCTION__, err, dev_adr, |
| 665 | atadev->obj_handle); |
| 666 | goto out; |
| 667 | } |
| 668 | } |
| 669 | |
| 670 | /* Give the drive Identify data to the drive via the _SDD method */ |
| 671 | /* _SDD: set up input parameters */ |
| 672 | input.count = 1; |
| 673 | input.pointer = in_params; |
| 674 | in_params[0].type = ACPI_TYPE_BUFFER; |
Fiodor Suietov | 9de1cc9 | 2006-12-19 12:33:20 -0800 | [diff] [blame] | 675 | in_params[0].buffer.length = sizeof(atadev->id[0]) * ATA_ID_WORDS; |
Kristen Carlson Accardi | 7ea1fbc | 2006-09-28 11:29:12 -0700 | [diff] [blame] | 676 | in_params[0].buffer.pointer = (u8 *)atadev->id; |
| 677 | /* Output buffer: _SDD has no output */ |
| 678 | |
| 679 | /* It's OK for _SDD to be missing too. */ |
| 680 | swap_buf_le16(atadev->id, ATA_ID_WORDS); |
| 681 | status = acpi_evaluate_object(atadev->obj_handle, "_SDD", &input, NULL); |
| 682 | swap_buf_le16(atadev->id, ATA_ID_WORDS); |
| 683 | |
| 684 | err = ACPI_FAILURE(status) ? -EIO : 0; |
| 685 | if (err < 0) { |
| 686 | if (ata_msg_probe(ap)) |
| 687 | ata_dev_printk(atadev, KERN_DEBUG, |
| 688 | "ata%u(%u): %s _SDD error: status = 0x%x\n", |
| 689 | ap->id, ap->device->devno, |
| 690 | __FUNCTION__, status); |
| 691 | } |
| 692 | |
| 693 | /* always return success */ |
| 694 | out: |
| 695 | return 0; |
| 696 | } |
| 697 | |
| 698 | |