1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright 2012 Advanced Micro Devices, Inc. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be included in 13 * all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 21 * OTHER DEALINGS IN THE SOFTWARE. 22 * 23 */ 24 25 #include <linux/pci.h> 26 #include <linux/acpi.h> 27 #include <linux/backlight.h> 28 #include <linux/slab.h> 29 #include <linux/xarray.h> 30 #include <linux/power_supply.h> 31 #include <linux/pm_runtime.h> 32 #include <linux/suspend.h> 33 #include <acpi/video.h> 34 #include <acpi/actbl.h> 35 36 #include "amdgpu.h" 37 #include "amdgpu_pm.h" 38 #include "amdgpu_display.h" 39 #include "amd_acpi.h" 40 #include "atom.h" 41 42 /* Declare GUID for AMD _DSM method for XCCs */ 43 static const guid_t amd_xcc_dsm_guid = GUID_INIT(0x8267f5d5, 0xa556, 0x44f2, 44 0xb8, 0xb4, 0x45, 0x56, 0x2e, 45 0x8c, 0x5b, 0xec); 46 47 #define AMD_XCC_HID_START 3000 48 #define AMD_XCC_DSM_GET_NUM_FUNCS 0 49 #define AMD_XCC_DSM_GET_SUPP_MODE 1 50 #define AMD_XCC_DSM_GET_XCP_MODE 2 51 #define AMD_XCC_DSM_GET_VF_XCC_MAPPING 4 52 #define AMD_XCC_DSM_GET_TMR_INFO 5 53 #define AMD_XCC_DSM_NUM_FUNCS 5 54 55 #define AMD_XCC_MAX_HID 24 56 57 struct xarray numa_info_xa; 58 59 /* Encapsulates the XCD acpi object information */ 60 struct amdgpu_acpi_xcc_info { 61 struct list_head list; 62 struct amdgpu_numa_info *numa_info; 63 uint8_t xcp_node; 64 uint8_t phy_id; 65 acpi_handle handle; 66 }; 67 68 struct amdgpu_acpi_dev_info { 69 struct list_head list; 70 struct list_head xcc_list; 71 uint32_t sbdf; 72 uint16_t supp_xcp_mode; 73 uint16_t xcp_mode; 74 uint16_t mem_mode; 75 uint64_t tmr_base; 76 uint64_t tmr_size; 77 }; 78 79 struct list_head amdgpu_acpi_dev_list; 80 81 struct amdgpu_atif_notification_cfg { 82 bool enabled; 83 int command_code; 84 }; 85 86 struct amdgpu_atif_notifications { 87 bool thermal_state; 88 bool forced_power_state; 89 bool system_power_state; 90 bool brightness_change; 91 bool dgpu_display_event; 92 bool gpu_package_power_limit; 93 }; 94 95 struct amdgpu_atif_functions { 96 bool system_params; 97 bool sbios_requests; 98 bool temperature_change; 99 bool query_backlight_transfer_characteristics; 100 bool ready_to_undock; 101 bool external_gpu_information; 102 }; 103 104 struct amdgpu_atif { 105 acpi_handle handle; 106 107 struct amdgpu_atif_notifications notifications; 108 struct amdgpu_atif_functions functions; 109 struct amdgpu_atif_notification_cfg notification_cfg; 110 struct backlight_device *bd; 111 struct amdgpu_dm_backlight_caps backlight_caps; 112 }; 113 114 struct amdgpu_atcs_functions { 115 bool get_ext_state; 116 bool pcie_perf_req; 117 bool pcie_dev_rdy; 118 bool pcie_bus_width; 119 bool power_shift_control; 120 }; 121 122 struct amdgpu_atcs { 123 acpi_handle handle; 124 125 struct amdgpu_atcs_functions functions; 126 }; 127 128 static struct amdgpu_acpi_priv { 129 struct amdgpu_atif atif; 130 struct amdgpu_atcs atcs; 131 } amdgpu_acpi_priv; 132 133 /* Call the ATIF method 134 */ 135 /** 136 * amdgpu_atif_call - call an ATIF method 137 * 138 * @atif: atif structure 139 * @function: the ATIF function to execute 140 * @params: ATIF function params 141 * 142 * Executes the requested ATIF function (all asics). 143 * Returns a pointer to the acpi output buffer. 144 */ 145 static union acpi_object *amdgpu_atif_call(struct amdgpu_atif *atif, 146 int function, 147 struct acpi_buffer *params) 148 { 149 acpi_status status; 150 union acpi_object *obj; 151 union acpi_object atif_arg_elements[2]; 152 struct acpi_object_list atif_arg; 153 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 154 155 atif_arg.count = 2; 156 atif_arg.pointer = &atif_arg_elements[0]; 157 158 atif_arg_elements[0].type = ACPI_TYPE_INTEGER; 159 atif_arg_elements[0].integer.value = function; 160 161 if (params) { 162 atif_arg_elements[1].type = ACPI_TYPE_BUFFER; 163 atif_arg_elements[1].buffer.length = params->length; 164 atif_arg_elements[1].buffer.pointer = params->pointer; 165 } else { 166 /* We need a second fake parameter */ 167 atif_arg_elements[1].type = ACPI_TYPE_INTEGER; 168 atif_arg_elements[1].integer.value = 0; 169 } 170 171 status = acpi_evaluate_object(atif->handle, NULL, &atif_arg, 172 &buffer); 173 obj = (union acpi_object *)buffer.pointer; 174 175 /* Fail if calling the method fails */ 176 if (ACPI_FAILURE(status)) { 177 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", 178 acpi_format_exception(status)); 179 kfree(obj); 180 return NULL; 181 } 182 183 if (obj->type != ACPI_TYPE_BUFFER) { 184 DRM_DEBUG_DRIVER("bad object returned from ATIF: %d\n", 185 obj->type); 186 kfree(obj); 187 return NULL; 188 } 189 190 return obj; 191 } 192 193 /** 194 * amdgpu_atif_parse_notification - parse supported notifications 195 * 196 * @n: supported notifications struct 197 * @mask: supported notifications mask from ATIF 198 * 199 * Use the supported notifications mask from ATIF function 200 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications 201 * are supported (all asics). 202 */ 203 static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask) 204 { 205 n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED; 206 n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED; 207 n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED; 208 n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED; 209 n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED; 210 n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED; 211 } 212 213 /** 214 * amdgpu_atif_parse_functions - parse supported functions 215 * 216 * @f: supported functions struct 217 * @mask: supported functions mask from ATIF 218 * 219 * Use the supported functions mask from ATIF function 220 * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions 221 * are supported (all asics). 222 */ 223 static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask) 224 { 225 f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED; 226 f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED; 227 f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED; 228 f->query_backlight_transfer_characteristics = 229 mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED; 230 f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED; 231 f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED; 232 } 233 234 /** 235 * amdgpu_atif_verify_interface - verify ATIF 236 * 237 * @atif: amdgpu atif struct 238 * 239 * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function 240 * to initialize ATIF and determine what features are supported 241 * (all asics). 242 * returns 0 on success, error on failure. 243 */ 244 static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif) 245 { 246 union acpi_object *info; 247 struct atif_verify_interface output; 248 size_t size; 249 int err = 0; 250 251 info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL); 252 if (!info) 253 return -EIO; 254 255 memset(&output, 0, sizeof(output)); 256 257 size = *(u16 *) info->buffer.pointer; 258 if (size < 12) { 259 DRM_INFO("ATIF buffer is too small: %zu\n", size); 260 err = -EINVAL; 261 goto out; 262 } 263 size = min(sizeof(output), size); 264 265 memcpy(&output, info->buffer.pointer, size); 266 267 /* TODO: check version? */ 268 DRM_DEBUG_DRIVER("ATIF version %u\n", output.version); 269 270 amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask); 271 amdgpu_atif_parse_functions(&atif->functions, output.function_bits); 272 273 out: 274 kfree(info); 275 return err; 276 } 277 278 /** 279 * amdgpu_atif_get_notification_params - determine notify configuration 280 * 281 * @atif: acpi handle 282 * 283 * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function 284 * to determine if a notifier is used and if so which one 285 * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n) 286 * where n is specified in the result if a notifier is used. 287 * Returns 0 on success, error on failure. 288 */ 289 static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif) 290 { 291 union acpi_object *info; 292 struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg; 293 struct atif_system_params params; 294 size_t size; 295 int err = 0; 296 297 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, 298 NULL); 299 if (!info) { 300 err = -EIO; 301 goto out; 302 } 303 304 size = *(u16 *) info->buffer.pointer; 305 if (size < 10) { 306 err = -EINVAL; 307 goto out; 308 } 309 310 memset(¶ms, 0, sizeof(params)); 311 size = min(sizeof(params), size); 312 memcpy(¶ms, info->buffer.pointer, size); 313 314 DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n", 315 params.flags, params.valid_mask); 316 params.flags = params.flags & params.valid_mask; 317 318 if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) { 319 n->enabled = false; 320 n->command_code = 0; 321 } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) { 322 n->enabled = true; 323 n->command_code = 0x81; 324 } else { 325 if (size < 11) { 326 err = -EINVAL; 327 goto out; 328 } 329 n->enabled = true; 330 n->command_code = params.command_code; 331 } 332 333 out: 334 DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n", 335 (n->enabled ? "enabled" : "disabled"), 336 n->command_code); 337 kfree(info); 338 return err; 339 } 340 341 /** 342 * amdgpu_atif_query_backlight_caps - get min and max backlight input signal 343 * 344 * @atif: acpi handle 345 * 346 * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function 347 * to determine the acceptable range of backlight values 348 * 349 * Backlight_caps.caps_valid will be set to true if the query is successful 350 * 351 * The input signals are in range 0-255 352 * 353 * This function assumes the display with backlight is the first LCD 354 * 355 * Returns 0 on success, error on failure. 356 */ 357 static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif) 358 { 359 union acpi_object *info; 360 struct atif_qbtc_output characteristics; 361 struct atif_qbtc_arguments arguments; 362 struct acpi_buffer params; 363 size_t size; 364 int err = 0; 365 366 arguments.size = sizeof(arguments); 367 arguments.requested_display = ATIF_QBTC_REQUEST_LCD1; 368 369 params.length = sizeof(arguments); 370 params.pointer = (void *)&arguments; 371 372 info = amdgpu_atif_call(atif, 373 ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS, 374 ¶ms); 375 if (!info) { 376 err = -EIO; 377 goto out; 378 } 379 380 size = *(u16 *) info->buffer.pointer; 381 if (size < 10) { 382 err = -EINVAL; 383 goto out; 384 } 385 386 memset(&characteristics, 0, sizeof(characteristics)); 387 size = min(sizeof(characteristics), size); 388 memcpy(&characteristics, info->buffer.pointer, size); 389 390 atif->backlight_caps.caps_valid = true; 391 atif->backlight_caps.min_input_signal = 392 characteristics.min_input_signal; 393 atif->backlight_caps.max_input_signal = 394 characteristics.max_input_signal; 395 atif->backlight_caps.ac_level = characteristics.ac_level; 396 atif->backlight_caps.dc_level = characteristics.dc_level; 397 atif->backlight_caps.data_points = characteristics.number_of_points; 398 memcpy(atif->backlight_caps.luminance_data, 399 characteristics.data_points, 400 sizeof(atif->backlight_caps.luminance_data)); 401 out: 402 kfree(info); 403 return err; 404 } 405 406 /** 407 * amdgpu_atif_get_sbios_requests - get requested sbios event 408 * 409 * @atif: acpi handle 410 * @req: atif sbios request struct 411 * 412 * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function 413 * to determine what requests the sbios is making to the driver 414 * (all asics). 415 * Returns 0 on success, error on failure. 416 */ 417 static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif, 418 struct atif_sbios_requests *req) 419 { 420 union acpi_object *info; 421 size_t size; 422 int count = 0; 423 424 info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, 425 NULL); 426 if (!info) 427 return -EIO; 428 429 size = *(u16 *)info->buffer.pointer; 430 if (size < 0xd) { 431 count = -EINVAL; 432 goto out; 433 } 434 memset(req, 0, sizeof(*req)); 435 436 size = min(sizeof(*req), size); 437 memcpy(req, info->buffer.pointer, size); 438 DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending); 439 440 count = hweight32(req->pending); 441 442 out: 443 kfree(info); 444 return count; 445 } 446 447 /** 448 * amdgpu_atif_handler - handle ATIF notify requests 449 * 450 * @adev: amdgpu_device pointer 451 * @event: atif sbios request struct 452 * 453 * Checks the acpi event and if it matches an atif event, 454 * handles it. 455 * 456 * Returns: 457 * NOTIFY_BAD or NOTIFY_DONE, depending on the event. 458 */ 459 static int amdgpu_atif_handler(struct amdgpu_device *adev, 460 struct acpi_bus_event *event) 461 { 462 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif; 463 int count; 464 465 DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n", 466 event->device_class, event->type); 467 468 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) 469 return NOTIFY_DONE; 470 471 /* Is this actually our event? */ 472 if (!atif->notification_cfg.enabled || 473 event->type != atif->notification_cfg.command_code) { 474 /* These events will generate keypresses otherwise */ 475 if (event->type == ACPI_VIDEO_NOTIFY_PROBE) 476 return NOTIFY_BAD; 477 else 478 return NOTIFY_DONE; 479 } 480 481 if (atif->functions.sbios_requests) { 482 struct atif_sbios_requests req; 483 484 /* Check pending SBIOS requests */ 485 count = amdgpu_atif_get_sbios_requests(atif, &req); 486 487 if (count <= 0) 488 return NOTIFY_BAD; 489 490 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count); 491 492 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) { 493 if (atif->bd) { 494 DRM_DEBUG_DRIVER("Changing brightness to %d\n", 495 req.backlight_level); 496 /* 497 * XXX backlight_device_set_brightness() is 498 * hardwired to post BACKLIGHT_UPDATE_SYSFS. 499 * It probably should accept 'reason' parameter. 500 */ 501 backlight_device_set_brightness(atif->bd, req.backlight_level); 502 } 503 } 504 505 if (req.pending & ATIF_DGPU_DISPLAY_EVENT) { 506 if (adev->flags & AMD_IS_PX) { 507 pm_runtime_get_sync(adev_to_drm(adev)->dev); 508 /* Just fire off a uevent and let userspace tell us what to do */ 509 drm_helper_hpd_irq_event(adev_to_drm(adev)); 510 pm_runtime_put_autosuspend(adev_to_drm(adev)->dev); 511 } 512 } 513 /* TODO: check other events */ 514 } 515 516 /* We've handled the event, stop the notifier chain. The ACPI interface 517 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to 518 * userspace if the event was generated only to signal a SBIOS 519 * request. 520 */ 521 return NOTIFY_BAD; 522 } 523 524 /* Call the ATCS method 525 */ 526 /** 527 * amdgpu_atcs_call - call an ATCS method 528 * 529 * @atcs: atcs structure 530 * @function: the ATCS function to execute 531 * @params: ATCS function params 532 * 533 * Executes the requested ATCS function (all asics). 534 * Returns a pointer to the acpi output buffer. 535 */ 536 static union acpi_object *amdgpu_atcs_call(struct amdgpu_atcs *atcs, 537 int function, 538 struct acpi_buffer *params) 539 { 540 acpi_status status; 541 union acpi_object atcs_arg_elements[2]; 542 struct acpi_object_list atcs_arg; 543 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 544 545 atcs_arg.count = 2; 546 atcs_arg.pointer = &atcs_arg_elements[0]; 547 548 atcs_arg_elements[0].type = ACPI_TYPE_INTEGER; 549 atcs_arg_elements[0].integer.value = function; 550 551 if (params) { 552 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER; 553 atcs_arg_elements[1].buffer.length = params->length; 554 atcs_arg_elements[1].buffer.pointer = params->pointer; 555 } else { 556 /* We need a second fake parameter */ 557 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER; 558 atcs_arg_elements[1].integer.value = 0; 559 } 560 561 status = acpi_evaluate_object(atcs->handle, NULL, &atcs_arg, &buffer); 562 563 /* Fail only if calling the method fails and ATIF is supported */ 564 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 565 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n", 566 acpi_format_exception(status)); 567 kfree(buffer.pointer); 568 return NULL; 569 } 570 571 return buffer.pointer; 572 } 573 574 /** 575 * amdgpu_atcs_parse_functions - parse supported functions 576 * 577 * @f: supported functions struct 578 * @mask: supported functions mask from ATCS 579 * 580 * Use the supported functions mask from ATCS function 581 * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions 582 * are supported (all asics). 583 */ 584 static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask) 585 { 586 f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED; 587 f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED; 588 f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED; 589 f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED; 590 f->power_shift_control = mask & ATCS_SET_POWER_SHIFT_CONTROL_SUPPORTED; 591 } 592 593 /** 594 * amdgpu_atcs_verify_interface - verify ATCS 595 * 596 * @atcs: amdgpu atcs struct 597 * 598 * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function 599 * to initialize ATCS and determine what features are supported 600 * (all asics). 601 * returns 0 on success, error on failure. 602 */ 603 static int amdgpu_atcs_verify_interface(struct amdgpu_atcs *atcs) 604 { 605 union acpi_object *info; 606 struct atcs_verify_interface output; 607 size_t size; 608 int err = 0; 609 610 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_VERIFY_INTERFACE, NULL); 611 if (!info) 612 return -EIO; 613 614 memset(&output, 0, sizeof(output)); 615 616 size = *(u16 *) info->buffer.pointer; 617 if (size < 8) { 618 DRM_INFO("ATCS buffer is too small: %zu\n", size); 619 err = -EINVAL; 620 goto out; 621 } 622 size = min(sizeof(output), size); 623 624 memcpy(&output, info->buffer.pointer, size); 625 626 /* TODO: check version? */ 627 DRM_DEBUG_DRIVER("ATCS version %u\n", output.version); 628 629 amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits); 630 631 out: 632 kfree(info); 633 return err; 634 } 635 636 /** 637 * amdgpu_acpi_is_pcie_performance_request_supported 638 * 639 * @adev: amdgpu_device pointer 640 * 641 * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods 642 * are supported (all asics). 643 * returns true if supported, false if not. 644 */ 645 bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev) 646 { 647 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs; 648 649 if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy) 650 return true; 651 652 return false; 653 } 654 655 /** 656 * amdgpu_acpi_is_power_shift_control_supported 657 * 658 * Check if the ATCS power shift control method 659 * is supported. 660 * returns true if supported, false if not. 661 */ 662 bool amdgpu_acpi_is_power_shift_control_supported(void) 663 { 664 return amdgpu_acpi_priv.atcs.functions.power_shift_control; 665 } 666 667 /** 668 * amdgpu_acpi_pcie_notify_device_ready 669 * 670 * @adev: amdgpu_device pointer 671 * 672 * Executes the PCIE_DEVICE_READY_NOTIFICATION method 673 * (all asics). 674 * returns 0 on success, error on failure. 675 */ 676 int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev) 677 { 678 union acpi_object *info; 679 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs; 680 681 if (!atcs->functions.pcie_dev_rdy) 682 return -EINVAL; 683 684 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL); 685 if (!info) 686 return -EIO; 687 688 kfree(info); 689 690 return 0; 691 } 692 693 /** 694 * amdgpu_acpi_pcie_performance_request 695 * 696 * @adev: amdgpu_device pointer 697 * @perf_req: requested perf level (pcie gen speed) 698 * @advertise: set advertise caps flag if set 699 * 700 * Executes the PCIE_PERFORMANCE_REQUEST method to 701 * change the pcie gen speed (all asics). 702 * returns 0 on success, error on failure. 703 */ 704 int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev, 705 u8 perf_req, bool advertise) 706 { 707 union acpi_object *info; 708 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs; 709 struct atcs_pref_req_input atcs_input; 710 struct atcs_pref_req_output atcs_output; 711 struct acpi_buffer params; 712 size_t size; 713 u32 retry = 3; 714 715 if (amdgpu_acpi_pcie_notify_device_ready(adev)) 716 return -EINVAL; 717 718 if (!atcs->functions.pcie_perf_req) 719 return -EINVAL; 720 721 atcs_input.size = sizeof(struct atcs_pref_req_input); 722 /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ 723 atcs_input.client_id = pci_dev_id(adev->pdev); 724 atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK; 725 atcs_input.flags = ATCS_WAIT_FOR_COMPLETION; 726 if (advertise) 727 atcs_input.flags |= ATCS_ADVERTISE_CAPS; 728 atcs_input.req_type = ATCS_PCIE_LINK_SPEED; 729 atcs_input.perf_req = perf_req; 730 731 params.length = sizeof(struct atcs_pref_req_input); 732 params.pointer = &atcs_input; 733 734 while (retry--) { 735 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms); 736 if (!info) 737 return -EIO; 738 739 memset(&atcs_output, 0, sizeof(atcs_output)); 740 741 size = *(u16 *) info->buffer.pointer; 742 if (size < 3) { 743 DRM_INFO("ATCS buffer is too small: %zu\n", size); 744 kfree(info); 745 return -EINVAL; 746 } 747 size = min(sizeof(atcs_output), size); 748 749 memcpy(&atcs_output, info->buffer.pointer, size); 750 751 kfree(info); 752 753 switch (atcs_output.ret_val) { 754 case ATCS_REQUEST_REFUSED: 755 default: 756 return -EINVAL; 757 case ATCS_REQUEST_COMPLETE: 758 return 0; 759 case ATCS_REQUEST_IN_PROGRESS: 760 udelay(10); 761 break; 762 } 763 } 764 765 return 0; 766 } 767 768 /** 769 * amdgpu_acpi_power_shift_control 770 * 771 * @adev: amdgpu_device pointer 772 * @dev_state: device acpi state 773 * @drv_state: driver state 774 * 775 * Executes the POWER_SHIFT_CONTROL method to 776 * communicate current dGPU device state and 777 * driver state to APU/SBIOS. 778 * returns 0 on success, error on failure. 779 */ 780 int amdgpu_acpi_power_shift_control(struct amdgpu_device *adev, 781 u8 dev_state, bool drv_state) 782 { 783 union acpi_object *info; 784 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs; 785 struct atcs_pwr_shift_input atcs_input; 786 struct acpi_buffer params; 787 788 if (!amdgpu_acpi_is_power_shift_control_supported()) 789 return -EINVAL; 790 791 atcs_input.size = sizeof(struct atcs_pwr_shift_input); 792 /* dGPU id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ 793 atcs_input.dgpu_id = pci_dev_id(adev->pdev); 794 atcs_input.dev_acpi_state = dev_state; 795 atcs_input.drv_state = drv_state; 796 797 params.length = sizeof(struct atcs_pwr_shift_input); 798 params.pointer = &atcs_input; 799 800 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_POWER_SHIFT_CONTROL, ¶ms); 801 if (!info) { 802 DRM_ERROR("ATCS PSC update failed\n"); 803 return -EIO; 804 } 805 806 kfree(info); 807 return 0; 808 } 809 810 /** 811 * amdgpu_acpi_smart_shift_update - update dGPU device state to SBIOS 812 * 813 * @adev: amdgpu device pointer 814 * @ss_state: current smart shift event 815 * 816 * returns 0 on success, 817 * otherwise return error number. 818 */ 819 int amdgpu_acpi_smart_shift_update(struct amdgpu_device *adev, 820 enum amdgpu_ss ss_state) 821 { 822 int r; 823 824 if (!amdgpu_device_supports_smart_shift(adev)) 825 return 0; 826 827 switch (ss_state) { 828 /* SBIOS trigger “stop”, “enable” and “start” at D0, Driver Operational. 829 * SBIOS trigger “stop” at D3, Driver Not Operational. 830 * SBIOS trigger “stop” and “disable” at D0, Driver NOT operational. 831 */ 832 case AMDGPU_SS_DRV_LOAD: 833 r = amdgpu_acpi_power_shift_control(adev, 834 AMDGPU_ATCS_PSC_DEV_STATE_D0, 835 AMDGPU_ATCS_PSC_DRV_STATE_OPR); 836 break; 837 case AMDGPU_SS_DEV_D0: 838 r = amdgpu_acpi_power_shift_control(adev, 839 AMDGPU_ATCS_PSC_DEV_STATE_D0, 840 AMDGPU_ATCS_PSC_DRV_STATE_OPR); 841 break; 842 case AMDGPU_SS_DEV_D3: 843 r = amdgpu_acpi_power_shift_control(adev, 844 AMDGPU_ATCS_PSC_DEV_STATE_D3_HOT, 845 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR); 846 break; 847 case AMDGPU_SS_DRV_UNLOAD: 848 r = amdgpu_acpi_power_shift_control(adev, 849 AMDGPU_ATCS_PSC_DEV_STATE_D0, 850 AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR); 851 break; 852 default: 853 return -EINVAL; 854 } 855 856 return r; 857 } 858 859 #ifdef CONFIG_ACPI_NUMA 860 static inline uint64_t amdgpu_acpi_get_numa_size(int nid) 861 { 862 /* This is directly using si_meminfo_node implementation as the 863 * function is not exported. 864 */ 865 int zone_type; 866 uint64_t managed_pages = 0; 867 868 pg_data_t *pgdat = NODE_DATA(nid); 869 870 for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++) 871 managed_pages += 872 zone_managed_pages(&pgdat->node_zones[zone_type]); 873 return managed_pages * PAGE_SIZE; 874 } 875 876 static struct amdgpu_numa_info *amdgpu_acpi_get_numa_info(uint32_t pxm) 877 { 878 struct amdgpu_numa_info *numa_info; 879 int nid; 880 881 numa_info = xa_load(&numa_info_xa, pxm); 882 883 if (!numa_info) { 884 struct sysinfo info; 885 886 numa_info = kzalloc(sizeof(*numa_info), GFP_KERNEL); 887 if (!numa_info) 888 return NULL; 889 890 nid = pxm_to_node(pxm); 891 numa_info->pxm = pxm; 892 numa_info->nid = nid; 893 894 if (numa_info->nid == NUMA_NO_NODE) { 895 si_meminfo(&info); 896 numa_info->size = info.totalram * info.mem_unit; 897 } else { 898 numa_info->size = amdgpu_acpi_get_numa_size(nid); 899 } 900 xa_store(&numa_info_xa, numa_info->pxm, numa_info, GFP_KERNEL); 901 } 902 903 return numa_info; 904 } 905 #endif 906 907 /** 908 * amdgpu_acpi_get_node_id - obtain the NUMA node id for corresponding amdgpu 909 * acpi device handle 910 * 911 * @handle: acpi handle 912 * @numa_info: amdgpu_numa_info structure holding numa information 913 * 914 * Queries the ACPI interface to fetch the corresponding NUMA Node ID for a 915 * given amdgpu acpi device. 916 * 917 * Returns ACPI STATUS OK with Node ID on success or the corresponding failure reason 918 */ 919 static acpi_status amdgpu_acpi_get_node_id(acpi_handle handle, 920 struct amdgpu_numa_info **numa_info) 921 { 922 #ifdef CONFIG_ACPI_NUMA 923 u64 pxm; 924 acpi_status status; 925 926 if (!numa_info) 927 return_ACPI_STATUS(AE_ERROR); 928 929 status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm); 930 931 if (ACPI_FAILURE(status)) 932 return status; 933 934 *numa_info = amdgpu_acpi_get_numa_info(pxm); 935 936 if (!*numa_info) 937 return_ACPI_STATUS(AE_ERROR); 938 939 return_ACPI_STATUS(AE_OK); 940 #else 941 return_ACPI_STATUS(AE_NOT_EXIST); 942 #endif 943 } 944 945 static struct amdgpu_acpi_dev_info *amdgpu_acpi_get_dev(u32 sbdf) 946 { 947 struct amdgpu_acpi_dev_info *acpi_dev; 948 949 if (list_empty(&amdgpu_acpi_dev_list)) 950 return NULL; 951 952 list_for_each_entry(acpi_dev, &amdgpu_acpi_dev_list, list) 953 if (acpi_dev->sbdf == sbdf) 954 return acpi_dev; 955 956 return NULL; 957 } 958 959 static int amdgpu_acpi_dev_init(struct amdgpu_acpi_dev_info **dev_info, 960 struct amdgpu_acpi_xcc_info *xcc_info, u32 sbdf) 961 { 962 struct amdgpu_acpi_dev_info *tmp; 963 union acpi_object *obj; 964 int ret = -ENOENT; 965 966 *dev_info = NULL; 967 tmp = kzalloc(sizeof(struct amdgpu_acpi_dev_info), GFP_KERNEL); 968 if (!tmp) 969 return -ENOMEM; 970 971 INIT_LIST_HEAD(&tmp->xcc_list); 972 INIT_LIST_HEAD(&tmp->list); 973 tmp->sbdf = sbdf; 974 975 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0, 976 AMD_XCC_DSM_GET_SUPP_MODE, NULL, 977 ACPI_TYPE_INTEGER); 978 979 if (!obj) { 980 acpi_handle_debug(xcc_info->handle, 981 "_DSM function %d evaluation failed", 982 AMD_XCC_DSM_GET_SUPP_MODE); 983 ret = -ENOENT; 984 goto out; 985 } 986 987 tmp->supp_xcp_mode = obj->integer.value & 0xFFFF; 988 ACPI_FREE(obj); 989 990 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0, 991 AMD_XCC_DSM_GET_XCP_MODE, NULL, 992 ACPI_TYPE_INTEGER); 993 994 if (!obj) { 995 acpi_handle_debug(xcc_info->handle, 996 "_DSM function %d evaluation failed", 997 AMD_XCC_DSM_GET_XCP_MODE); 998 ret = -ENOENT; 999 goto out; 1000 } 1001 1002 tmp->xcp_mode = obj->integer.value & 0xFFFF; 1003 tmp->mem_mode = (obj->integer.value >> 32) & 0xFFFF; 1004 ACPI_FREE(obj); 1005 1006 /* Evaluate DSMs and fill XCC information */ 1007 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0, 1008 AMD_XCC_DSM_GET_TMR_INFO, NULL, 1009 ACPI_TYPE_PACKAGE); 1010 1011 if (!obj || obj->package.count < 2) { 1012 acpi_handle_debug(xcc_info->handle, 1013 "_DSM function %d evaluation failed", 1014 AMD_XCC_DSM_GET_TMR_INFO); 1015 ret = -ENOENT; 1016 goto out; 1017 } 1018 1019 tmp->tmr_base = obj->package.elements[0].integer.value; 1020 tmp->tmr_size = obj->package.elements[1].integer.value; 1021 ACPI_FREE(obj); 1022 1023 DRM_DEBUG_DRIVER( 1024 "New dev(%x): Supported xcp mode: %x curr xcp_mode : %x mem mode : %x, tmr base: %llx tmr size: %llx ", 1025 tmp->sbdf, tmp->supp_xcp_mode, tmp->xcp_mode, tmp->mem_mode, 1026 tmp->tmr_base, tmp->tmr_size); 1027 list_add_tail(&tmp->list, &amdgpu_acpi_dev_list); 1028 *dev_info = tmp; 1029 1030 return 0; 1031 1032 out: 1033 if (obj) 1034 ACPI_FREE(obj); 1035 kfree(tmp); 1036 1037 return ret; 1038 } 1039 1040 static int amdgpu_acpi_get_xcc_info(struct amdgpu_acpi_xcc_info *xcc_info, 1041 u32 *sbdf) 1042 { 1043 union acpi_object *obj; 1044 acpi_status status; 1045 int ret = -ENOENT; 1046 1047 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0, 1048 AMD_XCC_DSM_GET_NUM_FUNCS, NULL, 1049 ACPI_TYPE_INTEGER); 1050 1051 if (!obj || obj->integer.value != AMD_XCC_DSM_NUM_FUNCS) 1052 goto out; 1053 ACPI_FREE(obj); 1054 1055 /* Evaluate DSMs and fill XCC information */ 1056 obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0, 1057 AMD_XCC_DSM_GET_VF_XCC_MAPPING, NULL, 1058 ACPI_TYPE_INTEGER); 1059 1060 if (!obj) { 1061 acpi_handle_debug(xcc_info->handle, 1062 "_DSM function %d evaluation failed", 1063 AMD_XCC_DSM_GET_VF_XCC_MAPPING); 1064 ret = -EINVAL; 1065 goto out; 1066 } 1067 1068 /* PF xcc id [39:32] */ 1069 xcc_info->phy_id = (obj->integer.value >> 32) & 0xFF; 1070 /* xcp node of this xcc [47:40] */ 1071 xcc_info->xcp_node = (obj->integer.value >> 40) & 0xFF; 1072 /* PF domain of this xcc [31:16] */ 1073 *sbdf = (obj->integer.value) & 0xFFFF0000; 1074 /* PF bus/dev/fn of this xcc [63:48] */ 1075 *sbdf |= (obj->integer.value >> 48) & 0xFFFF; 1076 ACPI_FREE(obj); 1077 obj = NULL; 1078 1079 status = 1080 amdgpu_acpi_get_node_id(xcc_info->handle, &xcc_info->numa_info); 1081 1082 /* TODO: check if this check is required */ 1083 if (ACPI_SUCCESS(status)) 1084 ret = 0; 1085 out: 1086 if (obj) 1087 ACPI_FREE(obj); 1088 1089 return ret; 1090 } 1091 1092 static int amdgpu_acpi_enumerate_xcc(void) 1093 { 1094 struct amdgpu_acpi_dev_info *dev_info = NULL; 1095 struct amdgpu_acpi_xcc_info *xcc_info; 1096 struct acpi_device *acpi_dev; 1097 char hid[ACPI_ID_LEN]; 1098 int ret, id; 1099 u32 sbdf; 1100 1101 INIT_LIST_HEAD(&amdgpu_acpi_dev_list); 1102 xa_init(&numa_info_xa); 1103 1104 for (id = 0; id < AMD_XCC_MAX_HID; id++) { 1105 sprintf(hid, "%s%d", "AMD", AMD_XCC_HID_START + id); 1106 acpi_dev = acpi_dev_get_first_match_dev(hid, NULL, -1); 1107 /* These ACPI objects are expected to be in sequential order. If 1108 * one is not found, no need to check the rest. 1109 */ 1110 if (!acpi_dev) { 1111 DRM_DEBUG_DRIVER("No matching acpi device found for %s", 1112 hid); 1113 break; 1114 } 1115 1116 xcc_info = kzalloc(sizeof(struct amdgpu_acpi_xcc_info), 1117 GFP_KERNEL); 1118 if (!xcc_info) { 1119 DRM_ERROR("Failed to allocate memory for xcc info\n"); 1120 return -ENOMEM; 1121 } 1122 1123 INIT_LIST_HEAD(&xcc_info->list); 1124 xcc_info->handle = acpi_device_handle(acpi_dev); 1125 acpi_dev_put(acpi_dev); 1126 1127 ret = amdgpu_acpi_get_xcc_info(xcc_info, &sbdf); 1128 if (ret) { 1129 kfree(xcc_info); 1130 continue; 1131 } 1132 1133 dev_info = amdgpu_acpi_get_dev(sbdf); 1134 1135 if (!dev_info) 1136 ret = amdgpu_acpi_dev_init(&dev_info, xcc_info, sbdf); 1137 1138 if (ret == -ENOMEM) 1139 return ret; 1140 1141 if (!dev_info) { 1142 kfree(xcc_info); 1143 continue; 1144 } 1145 1146 list_add_tail(&xcc_info->list, &dev_info->xcc_list); 1147 } 1148 1149 return 0; 1150 } 1151 1152 int amdgpu_acpi_get_tmr_info(struct amdgpu_device *adev, u64 *tmr_offset, 1153 u64 *tmr_size) 1154 { 1155 struct amdgpu_acpi_dev_info *dev_info; 1156 u32 sbdf; 1157 1158 if (!tmr_offset || !tmr_size) 1159 return -EINVAL; 1160 1161 sbdf = (pci_domain_nr(adev->pdev->bus) << 16); 1162 sbdf |= pci_dev_id(adev->pdev); 1163 dev_info = amdgpu_acpi_get_dev(sbdf); 1164 if (!dev_info) 1165 return -ENOENT; 1166 1167 *tmr_offset = dev_info->tmr_base; 1168 *tmr_size = dev_info->tmr_size; 1169 1170 return 0; 1171 } 1172 1173 int amdgpu_acpi_get_mem_info(struct amdgpu_device *adev, int xcc_id, 1174 struct amdgpu_numa_info *numa_info) 1175 { 1176 struct amdgpu_acpi_dev_info *dev_info; 1177 struct amdgpu_acpi_xcc_info *xcc_info; 1178 u32 sbdf; 1179 1180 if (!numa_info) 1181 return -EINVAL; 1182 1183 sbdf = (pci_domain_nr(adev->pdev->bus) << 16); 1184 sbdf |= pci_dev_id(adev->pdev); 1185 dev_info = amdgpu_acpi_get_dev(sbdf); 1186 if (!dev_info) 1187 return -ENOENT; 1188 1189 list_for_each_entry(xcc_info, &dev_info->xcc_list, list) { 1190 if (xcc_info->phy_id == xcc_id) { 1191 memcpy(numa_info, xcc_info->numa_info, 1192 sizeof(*numa_info)); 1193 return 0; 1194 } 1195 } 1196 1197 return -ENOENT; 1198 } 1199 1200 /** 1201 * amdgpu_acpi_event - handle notify events 1202 * 1203 * @nb: notifier block 1204 * @val: val 1205 * @data: acpi event 1206 * 1207 * Calls relevant amdgpu functions in response to various 1208 * acpi events. 1209 * Returns NOTIFY code 1210 */ 1211 static int amdgpu_acpi_event(struct notifier_block *nb, 1212 unsigned long val, 1213 void *data) 1214 { 1215 struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb); 1216 struct acpi_bus_event *entry = (struct acpi_bus_event *)data; 1217 1218 if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) { 1219 if (power_supply_is_system_supplied() > 0) 1220 DRM_DEBUG_DRIVER("pm: AC\n"); 1221 else 1222 DRM_DEBUG_DRIVER("pm: DC\n"); 1223 1224 amdgpu_pm_acpi_event_handler(adev); 1225 } 1226 1227 /* Check for pending SBIOS requests */ 1228 return amdgpu_atif_handler(adev, entry); 1229 } 1230 1231 /* Call all ACPI methods here */ 1232 /** 1233 * amdgpu_acpi_init - init driver acpi support 1234 * 1235 * @adev: amdgpu_device pointer 1236 * 1237 * Verifies the AMD ACPI interfaces and registers with the acpi 1238 * notifier chain (all asics). 1239 * Returns 0 on success, error on failure. 1240 */ 1241 int amdgpu_acpi_init(struct amdgpu_device *adev) 1242 { 1243 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif; 1244 1245 if (atif->notifications.brightness_change) { 1246 if (adev->dc_enabled) { 1247 #if defined(CONFIG_DRM_AMD_DC) 1248 struct amdgpu_display_manager *dm = &adev->dm; 1249 1250 if (dm->backlight_dev[0]) 1251 atif->bd = dm->backlight_dev[0]; 1252 #endif 1253 } else { 1254 struct drm_encoder *tmp; 1255 1256 /* Find the encoder controlling the brightness */ 1257 list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list, 1258 head) { 1259 struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp); 1260 1261 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) && 1262 enc->enc_priv) { 1263 struct amdgpu_encoder_atom_dig *dig = enc->enc_priv; 1264 1265 if (dig->bl_dev) { 1266 atif->bd = dig->bl_dev; 1267 break; 1268 } 1269 } 1270 } 1271 } 1272 } 1273 adev->acpi_nb.notifier_call = amdgpu_acpi_event; 1274 register_acpi_notifier(&adev->acpi_nb); 1275 1276 return 0; 1277 } 1278 1279 void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps) 1280 { 1281 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif; 1282 1283 memcpy(caps, &atif->backlight_caps, sizeof(*caps)); 1284 } 1285 1286 /** 1287 * amdgpu_acpi_fini - tear down driver acpi support 1288 * 1289 * @adev: amdgpu_device pointer 1290 * 1291 * Unregisters with the acpi notifier chain (all asics). 1292 */ 1293 void amdgpu_acpi_fini(struct amdgpu_device *adev) 1294 { 1295 unregister_acpi_notifier(&adev->acpi_nb); 1296 } 1297 1298 /** 1299 * amdgpu_atif_pci_probe_handle - look up the ATIF handle 1300 * 1301 * @pdev: pci device 1302 * 1303 * Look up the ATIF handles (all asics). 1304 * Returns true if the handle is found, false if not. 1305 */ 1306 static bool amdgpu_atif_pci_probe_handle(struct pci_dev *pdev) 1307 { 1308 char acpi_method_name[255] = { 0 }; 1309 struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name}; 1310 acpi_handle dhandle, atif_handle; 1311 acpi_status status; 1312 int ret; 1313 1314 dhandle = ACPI_HANDLE(&pdev->dev); 1315 if (!dhandle) 1316 return false; 1317 1318 status = acpi_get_handle(dhandle, "ATIF", &atif_handle); 1319 if (ACPI_FAILURE(status)) 1320 return false; 1321 1322 amdgpu_acpi_priv.atif.handle = atif_handle; 1323 acpi_get_name(amdgpu_acpi_priv.atif.handle, ACPI_FULL_PATHNAME, &buffer); 1324 DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name); 1325 ret = amdgpu_atif_verify_interface(&amdgpu_acpi_priv.atif); 1326 if (ret) { 1327 amdgpu_acpi_priv.atif.handle = 0; 1328 return false; 1329 } 1330 return true; 1331 } 1332 1333 /** 1334 * amdgpu_atcs_pci_probe_handle - look up the ATCS handle 1335 * 1336 * @pdev: pci device 1337 * 1338 * Look up the ATCS handles (all asics). 1339 * Returns true if the handle is found, false if not. 1340 */ 1341 static bool amdgpu_atcs_pci_probe_handle(struct pci_dev *pdev) 1342 { 1343 char acpi_method_name[255] = { 0 }; 1344 struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name }; 1345 acpi_handle dhandle, atcs_handle; 1346 acpi_status status; 1347 int ret; 1348 1349 dhandle = ACPI_HANDLE(&pdev->dev); 1350 if (!dhandle) 1351 return false; 1352 1353 status = acpi_get_handle(dhandle, "ATCS", &atcs_handle); 1354 if (ACPI_FAILURE(status)) 1355 return false; 1356 1357 amdgpu_acpi_priv.atcs.handle = atcs_handle; 1358 acpi_get_name(amdgpu_acpi_priv.atcs.handle, ACPI_FULL_PATHNAME, &buffer); 1359 DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name); 1360 ret = amdgpu_atcs_verify_interface(&amdgpu_acpi_priv.atcs); 1361 if (ret) { 1362 amdgpu_acpi_priv.atcs.handle = 0; 1363 return false; 1364 } 1365 return true; 1366 } 1367 1368 1369 /** 1370 * amdgpu_acpi_should_gpu_reset 1371 * 1372 * @adev: amdgpu_device_pointer 1373 * 1374 * returns true if should reset GPU, false if not 1375 */ 1376 bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev) 1377 { 1378 if ((adev->flags & AMD_IS_APU) && 1379 adev->gfx.imu.funcs) /* Not need to do mode2 reset for IMU enabled APUs */ 1380 return false; 1381 1382 if ((adev->flags & AMD_IS_APU) && 1383 amdgpu_acpi_is_s3_active(adev)) 1384 return false; 1385 1386 if (amdgpu_sriov_vf(adev)) 1387 return false; 1388 1389 #if IS_ENABLED(CONFIG_SUSPEND) 1390 return pm_suspend_target_state != PM_SUSPEND_TO_IDLE; 1391 #else 1392 return true; 1393 #endif 1394 } 1395 1396 /* 1397 * amdgpu_acpi_detect - detect ACPI ATIF/ATCS methods 1398 * 1399 * Check if we have the ATIF/ATCS methods and populate 1400 * the structures in the driver. 1401 */ 1402 void amdgpu_acpi_detect(void) 1403 { 1404 struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif; 1405 struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs; 1406 struct pci_dev *pdev = NULL; 1407 int ret; 1408 1409 while ((pdev = pci_get_base_class(PCI_BASE_CLASS_DISPLAY, pdev))) { 1410 if ((pdev->class != PCI_CLASS_DISPLAY_VGA << 8) && 1411 (pdev->class != PCI_CLASS_DISPLAY_OTHER << 8)) 1412 continue; 1413 1414 if (!atif->handle) 1415 amdgpu_atif_pci_probe_handle(pdev); 1416 if (!atcs->handle) 1417 amdgpu_atcs_pci_probe_handle(pdev); 1418 } 1419 1420 if (atif->functions.sbios_requests && !atif->functions.system_params) { 1421 /* XXX check this workraround, if sbios request function is 1422 * present we have to see how it's configured in the system 1423 * params 1424 */ 1425 atif->functions.system_params = true; 1426 } 1427 1428 if (atif->functions.system_params) { 1429 ret = amdgpu_atif_get_notification_params(atif); 1430 if (ret) { 1431 DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n", 1432 ret); 1433 /* Disable notification */ 1434 atif->notification_cfg.enabled = false; 1435 } 1436 } 1437 1438 if (atif->functions.query_backlight_transfer_characteristics) { 1439 ret = amdgpu_atif_query_backlight_caps(atif); 1440 if (ret) { 1441 DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n", 1442 ret); 1443 atif->backlight_caps.caps_valid = false; 1444 } 1445 } else { 1446 atif->backlight_caps.caps_valid = false; 1447 } 1448 1449 amdgpu_acpi_enumerate_xcc(); 1450 } 1451 1452 void amdgpu_acpi_release(void) 1453 { 1454 struct amdgpu_acpi_dev_info *dev_info, *dev_tmp; 1455 struct amdgpu_acpi_xcc_info *xcc_info, *xcc_tmp; 1456 struct amdgpu_numa_info *numa_info; 1457 unsigned long index; 1458 1459 xa_for_each(&numa_info_xa, index, numa_info) { 1460 kfree(numa_info); 1461 xa_erase(&numa_info_xa, index); 1462 } 1463 1464 if (list_empty(&amdgpu_acpi_dev_list)) 1465 return; 1466 1467 list_for_each_entry_safe(dev_info, dev_tmp, &amdgpu_acpi_dev_list, 1468 list) { 1469 list_for_each_entry_safe(xcc_info, xcc_tmp, &dev_info->xcc_list, 1470 list) { 1471 list_del(&xcc_info->list); 1472 kfree(xcc_info); 1473 } 1474 1475 list_del(&dev_info->list); 1476 kfree(dev_info); 1477 } 1478 } 1479 1480 #if IS_ENABLED(CONFIG_SUSPEND) 1481 /** 1482 * amdgpu_acpi_is_s3_active 1483 * 1484 * @adev: amdgpu_device_pointer 1485 * 1486 * returns true if supported, false if not. 1487 */ 1488 bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev) 1489 { 1490 return !(adev->flags & AMD_IS_APU) || 1491 (pm_suspend_target_state == PM_SUSPEND_MEM); 1492 } 1493 1494 /** 1495 * amdgpu_acpi_is_s0ix_active 1496 * 1497 * @adev: amdgpu_device_pointer 1498 * 1499 * returns true if supported, false if not. 1500 */ 1501 bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev) 1502 { 1503 if (!(adev->flags & AMD_IS_APU) || 1504 (pm_suspend_target_state != PM_SUSPEND_TO_IDLE)) 1505 return false; 1506 1507 if (adev->asic_type < CHIP_RAVEN) 1508 return false; 1509 1510 if (!(adev->pm.pp_feature & PP_GFXOFF_MASK)) 1511 return false; 1512 1513 /* 1514 * If ACPI_FADT_LOW_POWER_S0 is not set in the FADT, it is generally 1515 * risky to do any special firmware-related preparations for entering 1516 * S0ix even though the system is suspending to idle, so return false 1517 * in that case. 1518 */ 1519 if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) { 1520 dev_err_once(adev->dev, 1521 "Power consumption will be higher as BIOS has not been configured for suspend-to-idle.\n" 1522 "To use suspend-to-idle change the sleep mode in BIOS setup.\n"); 1523 return false; 1524 } 1525 1526 #if !IS_ENABLED(CONFIG_AMD_PMC) 1527 dev_err_once(adev->dev, 1528 "Power consumption will be higher as the kernel has not been compiled with CONFIG_AMD_PMC.\n"); 1529 return false; 1530 #else 1531 return true; 1532 #endif /* CONFIG_AMD_PMC */ 1533 } 1534 #endif /* CONFIG_SUSPEND */ 1535 1536 #if IS_ENABLED(CONFIG_DRM_AMD_ISP) 1537 static const struct acpi_device_id isp_sensor_ids[] = { 1538 { "OMNI5C10" }, 1539 { } 1540 }; 1541 1542 static int isp_match_acpi_device_ids(struct device *dev, const void *data) 1543 { 1544 return acpi_match_device(data, dev) ? 1 : 0; 1545 } 1546 1547 int amdgpu_acpi_get_isp4_dev(struct acpi_device **dev) 1548 { 1549 struct device *pdev __free(put_device) = NULL; 1550 struct acpi_device *acpi_pdev; 1551 1552 pdev = bus_find_device(&platform_bus_type, NULL, isp_sensor_ids, 1553 isp_match_acpi_device_ids); 1554 if (!pdev) 1555 return -EINVAL; 1556 1557 acpi_pdev = ACPI_COMPANION(pdev); 1558 if (!acpi_pdev) 1559 return -ENODEV; 1560 1561 *dev = acpi_pdev; 1562 1563 return 0; 1564 } 1565 #endif /* CONFIG_DRM_AMD_ISP */ 1566