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sys/dev/acpi_support/acpi_wmi.c
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1 /*- 2 * Copyright (c) 2009 Michael Gmelin <freebsd@grem.de> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 /* 31 * Driver for acpi-wmi mapping, provides an interface for vendor specific 32 * implementations (e.g. HP and Acer laptops). 33 * Inspired by the ACPI-WMI mapping driver (c) 2008-2008 Carlos Corbacho which 34 * implements this functionality for Linux. 35 * 36 * WMI and ACPI: http://www.microsoft.com/whdc/system/pnppwr/wmi/wmi-acpi.mspx 37 * acpi-wmi for Linux: http://www.kernel.org 38 */ 39 40 #include "opt_acpi.h" 41 #include <sys/param.h> 42 #include <sys/conf.h> 43 #include <sys/uio.h> 44 #include <sys/proc.h> 45 #include <sys/kernel.h> 46 #include <sys/malloc.h> 47 #include <sys/sbuf.h> 48 #include <sys/module.h> 49 #include <sys/bus.h> 50 51 #include <contrib/dev/acpica/include/acpi.h> 52 #include <contrib/dev/acpica/include/accommon.h> 53 #include <dev/acpica/acpivar.h> 54 #include "acpi_wmi_if.h" 55 56 static MALLOC_DEFINE(M_ACPIWMI, "acpiwmi", "ACPI-WMI mapping"); 57 58 #define _COMPONENT ACPI_OEM 59 ACPI_MODULE_NAME("ACPI_WMI"); 60 61 #define ACPI_WMI_REGFLAG_EXPENSIVE 0x1 /* GUID flag: Expensive operation */ 62 #define ACPI_WMI_REGFLAG_METHOD 0x2 /* GUID flag: Method call */ 63 #define ACPI_WMI_REGFLAG_STRING 0x4 /* GUID flag: String */ 64 #define ACPI_WMI_REGFLAG_EVENT 0x8 /* GUID flag: Event */ 65 #define ACPI_WMI_BMOF_UUID "05901221-D566-11D1-B2F0-00A0C9062910" 66 67 /* 68 * acpi_wmi driver private structure 69 */ 70 struct acpi_wmi_softc { 71 device_t wmi_dev; /* wmi device id */ 72 ACPI_HANDLE wmi_handle; /* handle of the PNP0C14 node */ 73 device_t ec_dev; /* acpi_ec0 */ 74 struct cdev *wmistat_dev_t; /* wmistat device handle */ 75 struct sbuf wmistat_sbuf; /* sbuf for /dev/wmistat output */ 76 pid_t wmistat_open_pid; /* pid operating on /dev/wmistat */ 77 int wmistat_bufptr; /* /dev/wmistat ptr to buffer position */ 78 char *mofbuf; 79 80 TAILQ_HEAD(wmi_info_list_head, wmi_info) wmi_info_list; 81 }; 82 83 /* 84 * Struct that holds information about 85 * about a single GUID entry in _WDG 86 */ 87 struct guid_info { 88 char guid[16]; /* 16 byte non human readable GUID */ 89 char oid[2]; /* object id or event notify id (first byte) */ 90 UINT8 max_instance; /* highest instance known for this GUID */ 91 UINT8 flags; /* ACPI_WMI_REGFLAG_%s */ 92 }; 93 94 /* WExx event generation state (on/off) */ 95 enum event_generation_state { 96 EVENT_GENERATION_ON = 1, 97 EVENT_GENERATION_OFF = 0 98 }; 99 100 /* 101 * Information about one entry in _WDG. 102 * List of those is used to lookup information by GUID. 103 */ 104 struct wmi_info { 105 TAILQ_ENTRY(wmi_info) wmi_list; 106 struct guid_info ginfo; /* information on guid */ 107 ACPI_NOTIFY_HANDLER event_handler;/* client provided event handler */ 108 void *event_handler_user_data; /* ev handler cookie */ 109 }; 110 111 ACPI_SERIAL_DECL(acpi_wmi, "ACPI-WMI Mapping"); 112 113 /* public interface - declaration */ 114 /* standard device interface*/ 115 static int acpi_wmi_probe(device_t dev); 116 static int acpi_wmi_attach(device_t dev); 117 static int acpi_wmi_detach(device_t dev); 118 /* see acpi_wmi_if.m */ 119 static int acpi_wmi_provides_guid_string_method(device_t dev, 120 const char *guid_string); 121 static ACPI_STATUS acpi_wmi_evaluate_call_method(device_t dev, 122 const char *guid_string, UINT8 instance, 123 UINT32 method_id, const ACPI_BUFFER *in, 124 ACPI_BUFFER *out); 125 static ACPI_STATUS acpi_wmi_install_event_handler_method(device_t dev, 126 const char *guid_string, ACPI_NOTIFY_HANDLER handler, 127 void *data); 128 static ACPI_STATUS acpi_wmi_remove_event_handler_method(device_t dev, 129 const char *guid_string); 130 static ACPI_STATUS acpi_wmi_get_event_data_method(device_t dev, 131 UINT32 event_id, ACPI_BUFFER *out); 132 static ACPI_STATUS acpi_wmi_get_block_method(device_t dev, 133 const char *guid_string, 134 UINT8 instance, ACPI_BUFFER *out); 135 static ACPI_STATUS acpi_wmi_set_block_method(device_t dev, 136 const char *guid_string, 137 UINT8 instance, const ACPI_BUFFER *in); 138 /* private interface - declaration */ 139 /* callbacks */ 140 static void acpi_wmi_notify_handler(ACPI_HANDLE h, UINT32 notify, 141 void *context); 142 static ACPI_STATUS acpi_wmi_ec_handler(UINT32 function, 143 ACPI_PHYSICAL_ADDRESS address, UINT32 width, 144 UINT64 *value, void *context, 145 void *region_context); 146 /* helpers */ 147 static ACPI_STATUS acpi_wmi_read_wdg_blocks(struct acpi_wmi_softc *sc, ACPI_HANDLE h); 148 static ACPI_STATUS acpi_wmi_toggle_we_event_generation(device_t dev, 149 struct wmi_info *winfo, 150 enum event_generation_state state); 151 static int acpi_wmi_guid_string_to_guid(const UINT8 *guid_string, 152 UINT8 *guid); 153 static struct wmi_info* acpi_wmi_lookup_wmi_info_by_guid_string(struct acpi_wmi_softc *sc, 154 const char *guid_string); 155 156 static d_open_t acpi_wmi_wmistat_open; 157 static d_close_t acpi_wmi_wmistat_close; 158 static d_read_t acpi_wmi_wmistat_read; 159 160 /* handler /dev/wmistat device */ 161 static struct cdevsw wmistat_cdevsw = { 162 .d_version = D_VERSION, 163 .d_open = acpi_wmi_wmistat_open, 164 .d_close = acpi_wmi_wmistat_close, 165 .d_read = acpi_wmi_wmistat_read, 166 .d_name = "wmistat", 167 }; 168 169 static device_method_t acpi_wmi_methods[] = { 170 /* Device interface */ 171 DEVMETHOD(device_probe, acpi_wmi_probe), 172 DEVMETHOD(device_attach, acpi_wmi_attach), 173 DEVMETHOD(device_detach, acpi_wmi_detach), 174 175 /* bus interface */ 176 DEVMETHOD(bus_add_child, bus_generic_add_child), 177 178 /* acpi_wmi interface */ 179 DEVMETHOD(acpi_wmi_provides_guid_string, 180 acpi_wmi_provides_guid_string_method), 181 DEVMETHOD(acpi_wmi_evaluate_call, acpi_wmi_evaluate_call_method), 182 DEVMETHOD(acpi_wmi_install_event_handler, 183 acpi_wmi_install_event_handler_method), 184 DEVMETHOD(acpi_wmi_remove_event_handler, 185 acpi_wmi_remove_event_handler_method), 186 DEVMETHOD(acpi_wmi_get_event_data, acpi_wmi_get_event_data_method), 187 DEVMETHOD(acpi_wmi_get_block, acpi_wmi_get_block_method), 188 DEVMETHOD(acpi_wmi_set_block, acpi_wmi_set_block_method), 189 190 DEVMETHOD_END 191 }; 192 193 static driver_t acpi_wmi_driver = { 194 "acpi_wmi", 195 acpi_wmi_methods, 196 sizeof(struct acpi_wmi_softc), 197 }; 198 199 DRIVER_MODULE(acpi_wmi, acpi, acpi_wmi_driver, 0, 0); 200 MODULE_VERSION(acpi_wmi, 1); 201 MODULE_DEPEND(acpi_wmi, acpi, 1, 1, 1); 202 static char *wmi_ids[] = {"PNP0C14", NULL}; 203 ACPI_PNP_INFO(wmi_ids); 204 205 /* 206 * Probe for the PNP0C14 ACPI node 207 */ 208 static int 209 acpi_wmi_probe(device_t dev) 210 { 211 int rv; 212 213 if (acpi_disabled("wmi")) 214 return (ENXIO); 215 rv = ACPI_ID_PROBE(device_get_parent(dev), dev, wmi_ids, NULL); 216 if (rv <= 0) 217 device_set_desc(dev, "ACPI-WMI mapping"); 218 219 return (rv); 220 } 221 222 /* 223 * Attach the device by: 224 * - Looking for the first ACPI EC device 225 * - Install the notify handler 226 * - Install the EC address space handler 227 * - Look for the _WDG node and read GUID information blocks 228 */ 229 static int 230 acpi_wmi_attach(device_t dev) 231 { 232 struct acpi_wmi_softc *sc; 233 int ret; 234 ACPI_STATUS status; 235 236 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 237 sc = device_get_softc(dev); 238 ret = ENXIO; 239 240 ACPI_SERIAL_BEGIN(acpi_wmi); 241 sc->wmi_dev = dev; 242 sc->wmi_handle = acpi_get_handle(dev); 243 TAILQ_INIT(&sc->wmi_info_list); 244 /* XXX Only works with one EC, but nearly all systems only have one. */ 245 if ((sc->ec_dev = devclass_get_device(devclass_find("acpi_ec"), 0)) 246 == NULL) 247 device_printf(dev, "cannot find EC device\n"); 248 if (ACPI_FAILURE((status = AcpiInstallNotifyHandler(sc->wmi_handle, 249 ACPI_DEVICE_NOTIFY, acpi_wmi_notify_handler, sc)))) 250 device_printf(sc->wmi_dev, "couldn't install notify handler - %s\n", 251 AcpiFormatException(status)); 252 else if (ACPI_FAILURE((status = AcpiInstallAddressSpaceHandler( 253 sc->wmi_handle, ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler, 254 NULL, sc)))) { 255 device_printf(sc->wmi_dev, "couldn't install EC handler - %s\n", 256 AcpiFormatException(status)); 257 AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY, 258 acpi_wmi_notify_handler); 259 } else if (ACPI_FAILURE((status = acpi_wmi_read_wdg_blocks(sc, 260 sc->wmi_handle)))) { 261 device_printf(sc->wmi_dev, "couldn't parse _WDG - %s\n", 262 AcpiFormatException(status)); 263 AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY, 264 acpi_wmi_notify_handler); 265 AcpiRemoveAddressSpaceHandler(sc->wmi_handle, ACPI_ADR_SPACE_EC, 266 acpi_wmi_ec_handler); 267 } else { 268 sc->wmistat_dev_t = make_dev(&wmistat_cdevsw, 0, UID_ROOT, 269 GID_WHEEL, 0644, "wmistat%d", device_get_unit(dev)); 270 sc->wmistat_dev_t->si_drv1 = sc; 271 sc->wmistat_open_pid = 0; 272 sc->wmistat_bufptr = -1; 273 ret = 0; 274 } 275 ACPI_SERIAL_END(acpi_wmi); 276 277 if (acpi_wmi_provides_guid_string_method(dev, ACPI_WMI_BMOF_UUID)) { 278 ACPI_BUFFER out = { ACPI_ALLOCATE_BUFFER, NULL }; 279 ACPI_OBJECT *obj; 280 281 device_printf(dev, "Embedded MOF found\n"); 282 status = acpi_wmi_get_block_method(dev, ACPI_WMI_BMOF_UUID, 283 0, &out); 284 if (ACPI_SUCCESS(status)) { 285 obj = out.Pointer; 286 if (obj && obj->Type == ACPI_TYPE_BUFFER) { 287 SYSCTL_ADD_OPAQUE(device_get_sysctl_ctx(dev), 288 SYSCTL_CHILDREN( 289 device_get_sysctl_tree(dev)), 290 OID_AUTO, "bmof", 291 CTLFLAG_RD | CTLFLAG_MPSAFE, 292 obj->Buffer.Pointer, 293 obj->Buffer.Length, 294 "A", "MOF Blob"); 295 } 296 } 297 sc->mofbuf = out.Pointer; 298 } 299 300 if (ret == 0) { 301 bus_generic_probe(dev); 302 ret = bus_generic_attach(dev); 303 } 304 305 return (ret); 306 } 307 308 /* 309 * Detach the driver by: 310 * - Removing notification handler 311 * - Removing address space handler 312 * - Turning off event generation for all WExx event activated by 313 * child drivers 314 */ 315 static int 316 acpi_wmi_detach(device_t dev) 317 { 318 struct wmi_info *winfo, *tmp; 319 struct acpi_wmi_softc *sc; 320 int ret; 321 322 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 323 sc = device_get_softc(dev); 324 ACPI_SERIAL_BEGIN(acpi_wmi); 325 326 if (sc->wmistat_open_pid != 0) { 327 ret = EBUSY; 328 } else { 329 AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY, 330 acpi_wmi_notify_handler); 331 AcpiRemoveAddressSpaceHandler(sc->wmi_handle, 332 ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler); 333 TAILQ_FOREACH_SAFE(winfo, &sc->wmi_info_list, wmi_list, tmp) { 334 if (winfo->event_handler) 335 acpi_wmi_toggle_we_event_generation(dev, 336 winfo, EVENT_GENERATION_OFF); 337 TAILQ_REMOVE(&sc->wmi_info_list, winfo, wmi_list); 338 free(winfo, M_ACPIWMI); 339 } 340 if (sc->wmistat_bufptr != -1) { 341 sbuf_delete(&sc->wmistat_sbuf); 342 sc->wmistat_bufptr = -1; 343 } 344 sc->wmistat_open_pid = 0; 345 destroy_dev(sc->wmistat_dev_t); 346 ret = 0; 347 AcpiOsFree(sc->mofbuf); 348 } 349 ACPI_SERIAL_END(acpi_wmi); 350 351 return (ret); 352 } 353 354 /* 355 * Check if the given GUID string (human readable format 356 * AABBCCDD-EEFF-GGHH-IIJJ-KKLLMMNNOOPP) 357 * exists within _WDG 358 */ 359 static int 360 acpi_wmi_provides_guid_string_method(device_t dev, const char *guid_string) 361 { 362 struct acpi_wmi_softc *sc; 363 struct wmi_info *winfo; 364 int ret; 365 366 sc = device_get_softc(dev); 367 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 368 ACPI_SERIAL_BEGIN(acpi_wmi); 369 winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string); 370 ret = (winfo == NULL)?0:winfo->ginfo.max_instance+1; 371 ACPI_SERIAL_END(acpi_wmi); 372 373 return (ret); 374 } 375 376 /* 377 * Call a method "method_id" on the given GUID block 378 * write result into user provided output buffer 379 */ 380 static ACPI_STATUS 381 acpi_wmi_evaluate_call_method(device_t dev, const char *guid_string, 382 UINT8 instance, UINT32 method_id, const ACPI_BUFFER *in, ACPI_BUFFER *out) 383 { 384 ACPI_OBJECT params[3]; 385 ACPI_OBJECT_LIST input; 386 char method[5] = "WMxx"; 387 struct wmi_info *winfo; 388 struct acpi_wmi_softc *sc; 389 ACPI_STATUS status; 390 391 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 392 393 sc = device_get_softc(dev); 394 ACPI_SERIAL_BEGIN(acpi_wmi); 395 if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string)) 396 == NULL) 397 status = AE_NOT_FOUND; 398 else if (!(winfo->ginfo.flags & ACPI_WMI_REGFLAG_METHOD)) 399 status = AE_BAD_DATA; 400 else if (instance > winfo->ginfo.max_instance) 401 status = AE_BAD_PARAMETER; 402 else { 403 params[0].Type = ACPI_TYPE_INTEGER; 404 params[0].Integer.Value = instance; 405 params[1].Type = ACPI_TYPE_INTEGER; 406 params[1].Integer.Value = method_id; 407 input.Pointer = params; 408 input.Count = 2; 409 if (in) { 410 params[2].Type = 411 (winfo->ginfo.flags & ACPI_WMI_REGFLAG_STRING) 412 ?ACPI_TYPE_STRING:ACPI_TYPE_BUFFER; 413 params[2].Buffer.Length = in->Length; 414 params[2].Buffer.Pointer = in->Pointer; 415 input.Count = 3; 416 } 417 method[2] = winfo->ginfo.oid[0]; 418 method[3] = winfo->ginfo.oid[1]; 419 status = AcpiEvaluateObject(sc->wmi_handle, method, 420 &input, out); 421 } 422 ACPI_SERIAL_END(acpi_wmi); 423 424 return (status); 425 } 426 427 /* 428 * Install a user provided event_handler on the given GUID 429 * provided *data will be passed on callback 430 * If there is already an existing event handler registered it will be silently 431 * discarded 432 */ 433 static ACPI_STATUS 434 acpi_wmi_install_event_handler_method(device_t dev, const char *guid_string, 435 ACPI_NOTIFY_HANDLER event_handler, void *data) 436 { 437 struct acpi_wmi_softc *sc = device_get_softc(dev); 438 struct wmi_info *winfo; 439 ACPI_STATUS status; 440 441 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 442 443 status = AE_OK; 444 ACPI_SERIAL_BEGIN(acpi_wmi); 445 if (guid_string == NULL || event_handler == NULL) 446 status = AE_BAD_PARAMETER; 447 else if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string)) 448 == NULL) 449 status = AE_NOT_EXIST; 450 else if (winfo->event_handler != NULL || 451 (status = acpi_wmi_toggle_we_event_generation(dev, winfo, 452 EVENT_GENERATION_ON)) == AE_OK) { 453 winfo->event_handler = event_handler; 454 winfo->event_handler_user_data = data; 455 } 456 ACPI_SERIAL_END(acpi_wmi); 457 458 return (status); 459 } 460 461 /* 462 * Remove a previously installed event handler from the given GUID 463 * If there was none installed, this call is silently discarded and 464 * reported as AE_OK 465 */ 466 static ACPI_STATUS 467 acpi_wmi_remove_event_handler_method(device_t dev, const char *guid_string) 468 { 469 struct acpi_wmi_softc *sc = device_get_softc(dev); 470 struct wmi_info *winfo; 471 ACPI_STATUS status; 472 473 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 474 475 status = AE_OK; 476 ACPI_SERIAL_BEGIN(acpi_wmi); 477 if (guid_string && 478 (winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string)) 479 != NULL && winfo->event_handler) { 480 status = acpi_wmi_toggle_we_event_generation(dev, winfo, 481 EVENT_GENERATION_OFF); 482 winfo->event_handler = NULL; 483 winfo->event_handler_user_data = NULL; 484 } 485 ACPI_SERIAL_END(acpi_wmi); 486 487 return (status); 488 } 489 490 /* 491 * Get details on an event received through a callback registered 492 * through ACPI_WMI_REMOVE_EVENT_HANDLER into a user provided output buffer. 493 * (event_id equals "notify" passed in the callback) 494 */ 495 static ACPI_STATUS 496 acpi_wmi_get_event_data_method(device_t dev, UINT32 event_id, ACPI_BUFFER *out) 497 { 498 ACPI_OBJECT_LIST input; 499 ACPI_OBJECT params[1]; 500 struct acpi_wmi_softc *sc; 501 struct wmi_info *winfo; 502 ACPI_STATUS status; 503 504 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 505 506 sc = device_get_softc(dev); 507 status = AE_NOT_FOUND; 508 ACPI_SERIAL_BEGIN(acpi_wmi); 509 params[0].Type = ACPI_TYPE_INTEGER; 510 params[0].Integer.Value = event_id; 511 input.Pointer = params; 512 input.Count = 1; 513 TAILQ_FOREACH(winfo, &sc->wmi_info_list, wmi_list) { 514 if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) && 515 ((UINT8) winfo->ginfo.oid[0] == event_id)) { 516 status = AcpiEvaluateObject(sc->wmi_handle, "_WED", 517 &input, out); 518 break; 519 } 520 } 521 ACPI_SERIAL_END(acpi_wmi); 522 523 return (status); 524 } 525 526 /* 527 * Read a block of data from the given GUID (using WQxx (query)) 528 * Will be returned in a user provided buffer (out). 529 * If the method is marked as expensive (ACPI_WMI_REGFLAG_EXPENSIVE) 530 * we will first call the WCxx control method to lock the node to 531 * lock the node for data collection and release it afterwards. 532 * (Failed WCxx calls are ignored to "support" broken implementations) 533 */ 534 static ACPI_STATUS 535 acpi_wmi_get_block_method(device_t dev, const char *guid_string, UINT8 instance, 536 ACPI_BUFFER *out) 537 { 538 char wc_method[5] = "WCxx"; 539 char wq_method[5] = "WQxx"; 540 ACPI_OBJECT_LIST wc_input; 541 ACPI_OBJECT_LIST wq_input; 542 ACPI_OBJECT wc_params[1]; 543 ACPI_OBJECT wq_params[1]; 544 ACPI_HANDLE wc_handle; 545 struct acpi_wmi_softc *sc; 546 struct wmi_info *winfo; 547 ACPI_STATUS status; 548 ACPI_STATUS wc_status; 549 550 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 551 552 sc = device_get_softc(dev); 553 wc_status = AE_ERROR; 554 ACPI_SERIAL_BEGIN(acpi_wmi); 555 if (guid_string == NULL || out == NULL) 556 status = AE_BAD_PARAMETER; 557 else if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string)) 558 == NULL) 559 status = AE_ERROR; 560 else if (instance > winfo->ginfo.max_instance) 561 status = AE_BAD_PARAMETER; 562 else if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) || 563 (winfo->ginfo.flags & ACPI_WMI_REGFLAG_METHOD)) 564 status = AE_ERROR; 565 else { 566 wq_params[0].Type = ACPI_TYPE_INTEGER; 567 wq_params[0].Integer.Value = instance; 568 wq_input.Pointer = wq_params; 569 wq_input.Count = 1; 570 if (winfo->ginfo.flags & ACPI_WMI_REGFLAG_EXPENSIVE) { 571 wc_params[0].Type = ACPI_TYPE_INTEGER; 572 wc_params[0].Integer.Value = 1; 573 wc_input.Pointer = wc_params; 574 wc_input.Count = 1; 575 wc_method[2] = winfo->ginfo.oid[0]; 576 wc_method[3] = winfo->ginfo.oid[1]; 577 wc_status = AcpiGetHandle(sc->wmi_handle, wc_method, 578 &wc_handle); 579 if (ACPI_SUCCESS(wc_status)) 580 wc_status = AcpiEvaluateObject(wc_handle, 581 wc_method, &wc_input, NULL); 582 } 583 wq_method[2] = winfo->ginfo.oid[0]; 584 wq_method[3] = winfo->ginfo.oid[1]; 585 status = AcpiEvaluateObject(sc->wmi_handle, wq_method, 586 &wq_input, out); 587 if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EXPENSIVE) 588 && ACPI_SUCCESS(wc_status)) { 589 wc_params[0].Integer.Value = 0; 590 status = AcpiEvaluateObject(wc_handle, wc_method, 591 &wc_input, NULL); /* XXX this might be 592 the wrong status to 593 return? */ 594 } 595 } 596 ACPI_SERIAL_END(acpi_wmi); 597 598 return (status); 599 } 600 601 /* 602 * Write a block of data to the given GUID (using WSxx) 603 */ 604 static ACPI_STATUS 605 acpi_wmi_set_block_method(device_t dev, const char *guid_string, UINT8 instance, 606 const ACPI_BUFFER *in) 607 { 608 char method[5] = "WSxx"; 609 ACPI_OBJECT_LIST input; 610 ACPI_OBJECT params[2]; 611 struct wmi_info *winfo; 612 struct acpi_wmi_softc *sc; 613 ACPI_STATUS status; 614 615 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 616 617 sc = device_get_softc(dev); 618 ACPI_SERIAL_BEGIN(acpi_wmi); 619 if (guid_string == NULL || in == NULL) 620 status = AE_BAD_DATA; 621 else if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string)) 622 == NULL) 623 status = AE_ERROR; 624 else if (instance > winfo->ginfo.max_instance) 625 status = AE_BAD_PARAMETER; 626 else if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) || 627 (winfo->ginfo.flags & ACPI_WMI_REGFLAG_METHOD)) 628 status = AE_ERROR; 629 else { 630 params[0].Type = ACPI_TYPE_INTEGER; 631 params[0].Integer.Value = instance; 632 input.Pointer = params; 633 input.Count = 2; 634 params[1].Type = (winfo->ginfo.flags & ACPI_WMI_REGFLAG_STRING) 635 ?ACPI_TYPE_STRING:ACPI_TYPE_BUFFER; 636 params[1].Buffer.Length = in->Length; 637 params[1].Buffer.Pointer = in->Pointer; 638 method[2] = winfo->ginfo.oid[0]; 639 method[3] = winfo->ginfo.oid[1]; 640 status = AcpiEvaluateObject(sc->wmi_handle, method, 641 &input, NULL); 642 } 643 ACPI_SERIAL_END(acpi_wmi); 644 645 return (status); 646 } 647 648 /* 649 * Handle events received and dispatch them to 650 * stakeholders that registered through ACPI_WMI_INSTALL_EVENT_HANDLER 651 */ 652 static void 653 acpi_wmi_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 654 { 655 struct acpi_wmi_softc *sc = context; 656 ACPI_NOTIFY_HANDLER handler; 657 void *handler_data; 658 struct wmi_info *winfo; 659 660 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify); 661 662 handler = NULL; 663 handler_data = NULL; 664 ACPI_SERIAL_BEGIN(acpi_wmi); 665 TAILQ_FOREACH(winfo, &sc->wmi_info_list, wmi_list) { 666 if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) && 667 ((UINT8) winfo->ginfo.oid[0] == notify)) { 668 if (winfo->event_handler) { 669 handler = winfo->event_handler; 670 handler_data = winfo->event_handler_user_data; 671 break; 672 } 673 } 674 } 675 ACPI_SERIAL_END(acpi_wmi); 676 if (handler) { 677 handler(h, notify, handler_data); 678 } 679 } 680 681 /* 682 * Handle EC address space notifications reveived on the WDG node 683 * (this mimics EcAddressSpaceHandler in acpi_ec.c) 684 */ 685 static ACPI_STATUS 686 acpi_wmi_ec_handler(UINT32 function, ACPI_PHYSICAL_ADDRESS address, 687 UINT32 width, UINT64 *value, void *context, 688 void *region_context) 689 { 690 struct acpi_wmi_softc *sc; 691 int i; 692 UINT64 ec_data; 693 UINT8 ec_addr; 694 ACPI_STATUS status; 695 696 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, (UINT32)address); 697 698 sc = (struct acpi_wmi_softc *)context; 699 if (width % 8 != 0 || value == NULL || context == NULL) 700 return (AE_BAD_PARAMETER); 701 if (address + (width / 8) - 1 > 0xFF) 702 return (AE_BAD_ADDRESS); 703 if (sc->ec_dev == NULL) 704 return (AE_NOT_FOUND); 705 if (function == ACPI_READ) 706 *value = 0; 707 ec_addr = address; 708 status = AE_ERROR; 709 710 for (i = 0; i < width; i += 8, ++ec_addr) { 711 switch (function) { 712 case ACPI_READ: 713 status = ACPI_EC_READ(sc->ec_dev, ec_addr, &ec_data, 1); 714 if (ACPI_SUCCESS(status)) 715 *value |= ((UINT64)ec_data) << i; 716 break; 717 case ACPI_WRITE: 718 ec_data = (UINT8)((*value) >> i); 719 status = ACPI_EC_WRITE(sc->ec_dev, ec_addr, ec_data, 1); 720 break; 721 default: 722 device_printf(sc->wmi_dev, 723 "invalid acpi_wmi_ec_handler function %d\n", 724 function); 725 status = AE_BAD_PARAMETER; 726 break; 727 } 728 if (ACPI_FAILURE(status)) 729 break; 730 } 731 732 return (status); 733 } 734 735 /* 736 * Read GUID blocks from the _WDG node 737 * into wmi_info_list. 738 */ 739 static ACPI_STATUS 740 acpi_wmi_read_wdg_blocks(struct acpi_wmi_softc *sc, ACPI_HANDLE h) 741 { 742 ACPI_BUFFER out = {ACPI_ALLOCATE_BUFFER, NULL}; 743 struct guid_info *ginfo; 744 ACPI_OBJECT *obj; 745 struct wmi_info *winfo; 746 UINT32 i; 747 UINT32 wdg_block_count; 748 ACPI_STATUS status; 749 750 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 751 752 ACPI_SERIAL_ASSERT(acpi_wmi); 753 if (ACPI_FAILURE(status = AcpiEvaluateObject(h, "_WDG", NULL, &out))) 754 return (status); 755 obj = (ACPI_OBJECT*) out.Pointer; 756 wdg_block_count = obj->Buffer.Length / sizeof(struct guid_info); 757 if ((ginfo = malloc(obj->Buffer.Length, M_ACPIWMI, M_NOWAIT)) 758 == NULL) { 759 AcpiOsFree(out.Pointer); 760 return (AE_NO_MEMORY); 761 } 762 memcpy(ginfo, obj->Buffer.Pointer, obj->Buffer.Length); 763 for (i = 0; i < wdg_block_count; ++i) { 764 if ((winfo = malloc(sizeof(struct wmi_info), M_ACPIWMI, 765 M_NOWAIT | M_ZERO)) == NULL) { 766 AcpiOsFree(out.Pointer); 767 free(ginfo, M_ACPIWMI); 768 return (AE_NO_MEMORY); 769 } 770 winfo->ginfo = ginfo[i]; 771 TAILQ_INSERT_TAIL(&sc->wmi_info_list, winfo, wmi_list); 772 } 773 AcpiOsFree(out.Pointer); 774 free(ginfo, M_ACPIWMI); 775 776 return (status); 777 } 778 779 /* 780 * Toggle event generation in for the given GUID (passed by winfo) 781 * Turn on to get notified (through acpi_wmi_notify_handler) if events happen 782 * on the given GUID. 783 */ 784 static ACPI_STATUS 785 acpi_wmi_toggle_we_event_generation(device_t dev, struct wmi_info *winfo, 786 enum event_generation_state state) 787 { 788 char method[5] = "WExx"; 789 ACPI_OBJECT_LIST input; 790 ACPI_OBJECT params[1]; 791 struct acpi_wmi_softc *sc; 792 ACPI_STATUS status; 793 794 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 795 796 sc = device_get_softc(dev); 797 ACPI_SERIAL_ASSERT(acpi_wmi); 798 params[0].Type = ACPI_TYPE_INTEGER; 799 params[0].Integer.Value = state==EVENT_GENERATION_ON?1:0; 800 input.Pointer = params; 801 input.Count = 1; 802 803 UINT8 hi = ((UINT8) winfo->ginfo.oid[0]) >> 4; 804 UINT8 lo = ((UINT8) winfo->ginfo.oid[0]) & 0xf; 805 method[2] = (hi > 9 ? hi + 55: hi + 48); 806 method[3] = (lo > 9 ? lo + 55: lo + 48); 807 status = AcpiEvaluateObject(sc->wmi_handle, method, &input, NULL); 808 if (status == AE_NOT_FOUND) status = AE_OK; 809 810 return (status); 811 } 812 813 /* 814 * Convert given two digit hex string (hexin) to an UINT8 referenced 815 * by byteout. 816 * Return != 0 if the was a problem (invalid input) 817 */ 818 static __inline int acpi_wmi_hex_to_int(const UINT8 *hexin, UINT8 *byteout) 819 { 820 unsigned int hi; 821 unsigned int lo; 822 823 hi = hexin[0]; 824 lo = hexin[1]; 825 if ('' <= hi && hi <= '9') 826 hi -= ''; 827 else if ('A' <= hi && hi <= 'F') 828 hi -= ('A' - 10); 829 else if ('a' <= hi && hi <= 'f') 830 hi -= ('a' - 10); 831 else 832 return (1); 833 if ('' <= lo && lo <= '9') 834 lo -= ''; 835 else if ('A' <= lo && lo <= 'F') 836 lo -= ('A' - 10); 837 else if ('a' <= lo && lo <= 'f') 838 lo -= ('a' - 10); 839 else 840 return (1); 841 *byteout = (hi << 4) + lo; 842 843 return (0); 844 } 845 846 /* 847 * Convert a human readable 36 character GUID into a 16byte 848 * machine readable one. 849 * The basic algorithm looks as follows: 850 * Input: AABBCCDD-EEFF-GGHH-IIJJ-KKLLMMNNOOPP 851 * Output: DCBAFEHGIJKLMNOP 852 * (AA BB CC etc. represent two digit hex numbers == bytes) 853 * Return != 0 if passed guid string is invalid 854 */ 855 static int 856 acpi_wmi_guid_string_to_guid(const UINT8 *guid_string, UINT8 *guid) 857 { 858 static const int mapping[20] = {3, 2, 1, 0, -1, 5, 4, -1, 7, 6, -1, 859 8, 9, -1, 10, 11, 12, 13, 14, 15}; 860 int i; 861 862 for (i = 0; i < 20; ++i, ++guid_string) { 863 if (mapping[i] >= 0) { 864 if (acpi_wmi_hex_to_int(guid_string, 865 &guid[mapping[i]])) 866 return (-1); 867 ++guid_string; 868 } else if (*guid_string != '-') 869 return (-1); 870 } 871 872 return (0); 873 } 874 875 /* 876 * Lookup a wmi_info structure in wmi_list based on a 877 * human readable GUID 878 * Return NULL if the GUID is unknown in the _WDG 879 */ 880 static struct wmi_info* 881 acpi_wmi_lookup_wmi_info_by_guid_string(struct acpi_wmi_softc *sc, const char *guid_string) 882 { 883 char guid[16]; 884 struct wmi_info *winfo; 885 886 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 887 888 ACPI_SERIAL_ASSERT(acpi_wmi); 889 890 if (!acpi_wmi_guid_string_to_guid(guid_string, guid)) { 891 TAILQ_FOREACH(winfo, &sc->wmi_info_list, wmi_list) { 892 if (!memcmp(winfo->ginfo.guid, guid, 16)) { 893 return (winfo); 894 } 895 } 896 } 897 898 return (NULL); 899 } 900 901 /* 902 * open wmistat device 903 */ 904 static int 905 acpi_wmi_wmistat_open(struct cdev* dev, int flags, int mode, struct thread *td) 906 { 907 struct acpi_wmi_softc *sc; 908 int ret; 909 910 if (dev == NULL || dev->si_drv1 == NULL) 911 return (EBADF); 912 sc = dev->si_drv1; 913 914 ACPI_SERIAL_BEGIN(acpi_wmi); 915 if (sc->wmistat_open_pid != 0) { 916 ret = EBUSY; 917 } 918 else { 919 if (sbuf_new(&sc->wmistat_sbuf, NULL, 4096, SBUF_AUTOEXTEND) 920 == NULL) { 921 ret = ENXIO; 922 } else { 923 sc->wmistat_open_pid = td->td_proc->p_pid; 924 sc->wmistat_bufptr = 0; 925 ret = 0; 926 } 927 } 928 ACPI_SERIAL_END(acpi_wmi); 929 930 return (ret); 931 } 932 933 /* 934 * close wmistat device 935 */ 936 static int 937 acpi_wmi_wmistat_close(struct cdev* dev, int flags, int mode, 938 struct thread *td) 939 { 940 struct acpi_wmi_softc *sc; 941 int ret; 942 943 if (dev == NULL || dev->si_drv1 == NULL) 944 return (EBADF); 945 sc = dev->si_drv1; 946 947 ACPI_SERIAL_BEGIN(acpi_wmi); 948 if (sc->wmistat_open_pid == 0) { 949 ret = EBADF; 950 } 951 else { 952 if (sc->wmistat_bufptr != -1) { 953 sbuf_delete(&sc->wmistat_sbuf); 954 sc->wmistat_bufptr = -1; 955 } 956 sc->wmistat_open_pid = 0; 957 ret = 0; 958 } 959 ACPI_SERIAL_END(acpi_wmi); 960 961 return (ret); 962 } 963 964 /* 965 * Read from wmistat guid information 966 */ 967 static int 968 acpi_wmi_wmistat_read(struct cdev *dev, struct uio *buf, int flag) 969 { 970 struct acpi_wmi_softc *sc; 971 struct wmi_info *winfo; 972 int l; 973 int ret; 974 UINT8* guid; 975 976 if (dev == NULL || dev->si_drv1 == NULL) 977 return (EBADF); 978 sc = dev->si_drv1; 979 980 ACPI_SERIAL_BEGIN(acpi_wmi); 981 if (sc->wmistat_open_pid != buf->uio_td->td_proc->p_pid || 982 sc->wmistat_bufptr == -1) { 983 ret = EBADF; 984 } 985 else { 986 if (!sbuf_done(&sc->wmistat_sbuf)) { 987 sbuf_printf(&sc->wmistat_sbuf, "GUID " 988 " INST EXPE METH STR " 989 "EVENT OID\n"); 990 TAILQ_FOREACH(winfo, &sc->wmi_info_list, wmi_list) { 991 guid = (UINT8*)winfo->ginfo.guid; 992 sbuf_printf(&sc->wmistat_sbuf, 993 "{%02X%02X%02X%02X-%02X%02X-" 994 "%02X%02X-%02X%02X-%02X%02X" 995 "%02X%02X%02X%02X} %3d %-5s", 996 guid[3], guid[2], guid[1], guid[0], 997 guid[5], guid[4], 998 guid[7], guid[6], 999 guid[8], guid[9], 1000 guid[10], guid[11], guid[12], 1001 guid[13], guid[14], guid[15], 1002 winfo->ginfo.max_instance, 1003 (winfo->ginfo.flags& 1004 ACPI_WMI_REGFLAG_EXPENSIVE)? 1005 "YES":"NO" 1006 ); 1007 if (winfo->ginfo.flags&ACPI_WMI_REGFLAG_METHOD) 1008 sbuf_printf(&sc->wmistat_sbuf, 1009 "WM%c%c ", 1010 winfo->ginfo.oid[0], 1011 winfo->ginfo.oid[1]); 1012 else 1013 sbuf_printf(&sc->wmistat_sbuf, "NO "); 1014 sbuf_printf(&sc->wmistat_sbuf, "%-4s", 1015 (winfo->ginfo.flags& 1016 ACPI_WMI_REGFLAG_STRING)?"YES":"NO" 1017 ); 1018 if (winfo->ginfo.flags&ACPI_WMI_REGFLAG_EVENT) 1019 sbuf_printf(&sc->wmistat_sbuf, 1020 "0x%02X%s -\n", 1021 (UINT8)winfo->ginfo.oid[0], 1022 winfo->event_handler==NULL? 1023 " ":"+"); 1024 else 1025 sbuf_printf(&sc->wmistat_sbuf, 1026 "NO %c%c\n", 1027 winfo->ginfo.oid[0], 1028 winfo->ginfo.oid[1]); 1029 } 1030 sbuf_finish(&sc->wmistat_sbuf); 1031 } 1032 if (sbuf_len(&sc->wmistat_sbuf) <= 0) { 1033 sbuf_delete(&sc->wmistat_sbuf); 1034 sc->wmistat_bufptr = -1; 1035 sc->wmistat_open_pid = 0; 1036 ret = ENOMEM; 1037 } else { 1038 l = min(buf->uio_resid, sbuf_len(&sc->wmistat_sbuf) - 1039 sc->wmistat_bufptr); 1040 ret = (l > 0)?uiomove(sbuf_data(&sc->wmistat_sbuf) + 1041 sc->wmistat_bufptr, l, buf) : 0; 1042 sc->wmistat_bufptr += l; 1043 } 1044 } 1045 ACPI_SERIAL_END(acpi_wmi); 1046 1047 return (ret); 1048 }
Cache object: c551841b8b430f4dfc2d0e591e428e84
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