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