drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c

   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(&params, 0, sizeof(params));
 302         size = min(sizeof(params), size);
 303         memcpy(&params, 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                 &params);
 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 = pci_dev_id(adev->pdev);
 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, &params);
 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 = pci_dev_id(adev->pdev);
 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, &params);
 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 #ifdef CONFIG_ACPI_NUMA
 845 static inline uint64_t amdgpu_acpi_get_numa_size(int nid)
 846 {
 847         /* This is directly using si_meminfo_node implementation as the
 848          * function is not exported.
 849          */
 850         int zone_type;
 851         uint64_t managed_pages = 0;
 852
 853         pg_data_t *pgdat = NODE_DATA(nid);
 854
 855         for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++)
 856                 managed_pages +=
 857                         zone_managed_pages(&pgdat->node_zones[zone_type]);
 858         return managed_pages * PAGE_SIZE;
 859 }
 860
 861 static struct amdgpu_numa_info *amdgpu_acpi_get_numa_info(uint32_t pxm)
 862 {
 863         struct amdgpu_numa_info *numa_info;
 864         int nid;
 865
 866         numa_info = xa_load(&numa_info_xa, pxm);
 867
 868         if (!numa_info) {
 869                 struct sysinfo info;
 870
 871                 numa_info = kzalloc(sizeof(*numa_info), GFP_KERNEL);
 872                 if (!numa_info)
 873                         return NULL;
 874
 875                 nid = pxm_to_node(pxm);
 876                 numa_info->pxm = pxm;
 877                 numa_info->nid = nid;
 878
 879                 if (numa_info->nid == NUMA_NO_NODE) {
 880                         si_meminfo(&info);
 881                         numa_info->size = info.totalram * info.mem_unit;
 882                 } else {
 883                         numa_info->size = amdgpu_acpi_get_numa_size(nid);
 884                 }
 885                 xa_store(&numa_info_xa, numa_info->pxm, numa_info, GFP_KERNEL);
 886         }
 887
 888         return numa_info;
 889 }
 890 #endif
 891
 892 /**
 893  * amdgpu_acpi_get_node_id - obtain the NUMA node id for corresponding amdgpu
 894  * acpi device handle
 895  *
 896  * @handle: acpi handle
 897  * @numa_info: amdgpu_numa_info structure holding numa information
 898  *
 899  * Queries the ACPI interface to fetch the corresponding NUMA Node ID for a
 900  * given amdgpu acpi device.
 901  *
 902  * Returns ACPI STATUS OK with Node ID on success or the corresponding failure reason
 903  */
 904 static acpi_status amdgpu_acpi_get_node_id(acpi_handle handle,
 905                                     struct amdgpu_numa_info **numa_info)
 906 {
 907 #ifdef CONFIG_ACPI_NUMA
 908         u64 pxm;
 909         acpi_status status;
 910
 911         if (!numa_info)
 912                 return_ACPI_STATUS(AE_ERROR);
 913
 914         status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
 915
 916         if (ACPI_FAILURE(status))
 917                 return status;
 918
 919         *numa_info = amdgpu_acpi_get_numa_info(pxm);
 920
 921         if (!*numa_info)
 922                 return_ACPI_STATUS(AE_ERROR);
 923
 924         return_ACPI_STATUS(AE_OK);
 925 #else
 926         return_ACPI_STATUS(AE_NOT_EXIST);
 927 #endif
 928 }
 929
 930 static struct amdgpu_acpi_dev_info *amdgpu_acpi_get_dev(u16 bdf)
 931 {
 932         struct amdgpu_acpi_dev_info *acpi_dev;
 933
 934         if (list_empty(&amdgpu_acpi_dev_list))
 935                 return NULL;
 936
 937         list_for_each_entry(acpi_dev, &amdgpu_acpi_dev_list, list)
 938                 if (acpi_dev->bdf == bdf)
 939                         return acpi_dev;
 940
 941         return NULL;
 942 }
 943
 944 static int amdgpu_acpi_dev_init(struct amdgpu_acpi_dev_info **dev_info,
 945                                 struct amdgpu_acpi_xcc_info *xcc_info, u16 bdf)
 946 {
 947         struct amdgpu_acpi_dev_info *tmp;
 948         union acpi_object *obj;
 949         int ret = -ENOENT;
 950
 951         *dev_info = NULL;
 952         tmp = kzalloc(sizeof(struct amdgpu_acpi_dev_info), GFP_KERNEL);
 953         if (!tmp)
 954                 return -ENOMEM;
 955
 956         INIT_LIST_HEAD(&tmp->xcc_list);
 957         INIT_LIST_HEAD(&tmp->list);
 958         tmp->bdf = bdf;
 959
 960         obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
 961                                       AMD_XCC_DSM_GET_SUPP_MODE, NULL,
 962                                       ACPI_TYPE_INTEGER);
 963
 964         if (!obj) {
 965                 acpi_handle_debug(xcc_info->handle,
 966                                   "_DSM function %d evaluation failed",
 967                                   AMD_XCC_DSM_GET_SUPP_MODE);
 968                 ret = -ENOENT;
 969                 goto out;
 970         }
 971
 972         tmp->supp_xcp_mode = obj->integer.value & 0xFFFF;
 973         ACPI_FREE(obj);
 974
 975         obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
 976                                       AMD_XCC_DSM_GET_XCP_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_XCP_MODE);
 983                 ret = -ENOENT;
 984                 goto out;
 985         }
 986
 987         tmp->xcp_mode = obj->integer.value & 0xFFFF;
 988         tmp->mem_mode = (obj->integer.value >> 32) & 0xFFFF;
 989         ACPI_FREE(obj);
 990
 991         /* Evaluate DSMs and fill XCC information */
 992         obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
 993                                       AMD_XCC_DSM_GET_TMR_INFO, NULL,
 994                                       ACPI_TYPE_PACKAGE);
 995
 996         if (!obj || obj->package.count < 2) {
 997                 acpi_handle_debug(xcc_info->handle,
 998                                   "_DSM function %d evaluation failed",
 999                                   AMD_XCC_DSM_GET_TMR_INFO);
1000                 ret = -ENOENT;
1001                 goto out;
1002         }
1003
1004         tmp->tmr_base = obj->package.elements[0].integer.value;
1005         tmp->tmr_size = obj->package.elements[1].integer.value;
1006         ACPI_FREE(obj);
1007
1008         DRM_DEBUG_DRIVER(
1009                 "New dev(%x): Supported xcp mode: %x curr xcp_mode : %x mem mode : %x, tmr base: %llx tmr size: %llx  ",
1010                 tmp->bdf, tmp->supp_xcp_mode, tmp->xcp_mode, tmp->mem_mode,
1011                 tmp->tmr_base, tmp->tmr_size);
1012         list_add_tail(&tmp->list, &amdgpu_acpi_dev_list);
1013         *dev_info = tmp;
1014
1015         return 0;
1016
1017 out:
1018         if (obj)
1019                 ACPI_FREE(obj);
1020         kfree(tmp);
1021
1022         return ret;
1023 }
1024
1025 static int amdgpu_acpi_get_xcc_info(struct amdgpu_acpi_xcc_info *xcc_info,
1026                                     u16 *bdf)
1027 {
1028         union acpi_object *obj;
1029         acpi_status status;
1030         int ret = -ENOENT;
1031
1032         obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1033                                       AMD_XCC_DSM_GET_NUM_FUNCS, NULL,
1034                                       ACPI_TYPE_INTEGER);
1035
1036         if (!obj || obj->integer.value != AMD_XCC_DSM_NUM_FUNCS)
1037                 goto out;
1038         ACPI_FREE(obj);
1039
1040         /* Evaluate DSMs and fill XCC information */
1041         obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1042                                       AMD_XCC_DSM_GET_VF_XCC_MAPPING, NULL,
1043                                       ACPI_TYPE_INTEGER);
1044
1045         if (!obj) {
1046                 acpi_handle_debug(xcc_info->handle,
1047                                   "_DSM function %d evaluation failed",
1048                                   AMD_XCC_DSM_GET_VF_XCC_MAPPING);
1049                 ret = -EINVAL;
1050                 goto out;
1051         }
1052
1053         /* PF xcc id [39:32] */
1054         xcc_info->phy_id = (obj->integer.value >> 32) & 0xFF;
1055         /* xcp node of this xcc [47:40] */
1056         xcc_info->xcp_node = (obj->integer.value >> 40) & 0xFF;
1057         /* PF bus/dev/fn of this xcc [63:48] */
1058         *bdf = (obj->integer.value >> 48) & 0xFFFF;
1059         ACPI_FREE(obj);
1060         obj = NULL;
1061
1062         status =
1063                 amdgpu_acpi_get_node_id(xcc_info->handle, &xcc_info->numa_info);
1064
1065         /* TODO: check if this check is required */
1066         if (ACPI_SUCCESS(status))
1067                 ret = 0;
1068 out:
1069         if (obj)
1070                 ACPI_FREE(obj);
1071
1072         return ret;
1073 }
1074
1075 static int amdgpu_acpi_enumerate_xcc(void)
1076 {
1077         struct amdgpu_acpi_dev_info *dev_info = NULL;
1078         struct amdgpu_acpi_xcc_info *xcc_info;
1079         struct acpi_device *acpi_dev;
1080         char hid[ACPI_ID_LEN];
1081         int ret, id;
1082         u16 bdf;
1083
1084         INIT_LIST_HEAD(&amdgpu_acpi_dev_list);
1085         xa_init(&numa_info_xa);
1086
1087         for (id = 0; id < AMD_XCC_MAX_HID; id++) {
1088                 sprintf(hid, "%s%d", "AMD", AMD_XCC_HID_START + id);
1089                 acpi_dev = acpi_dev_get_first_match_dev(hid, NULL, -1);
1090                 /* These ACPI objects are expected to be in sequential order. If
1091                  * one is not found, no need to check the rest.
1092                  */
1093                 if (!acpi_dev) {
1094                         DRM_DEBUG_DRIVER("No matching acpi device found for %s",
1095                                          hid);
1096                         break;
1097                 }
1098
1099                 xcc_info = kzalloc(sizeof(struct amdgpu_acpi_xcc_info),
1100                                    GFP_KERNEL);
1101                 if (!xcc_info) {
1102                         DRM_ERROR("Failed to allocate memory for xcc info\n");
1103                         return -ENOMEM;
1104                 }
1105
1106                 INIT_LIST_HEAD(&xcc_info->list);
1107                 xcc_info->handle = acpi_device_handle(acpi_dev);
1108                 acpi_dev_put(acpi_dev);
1109
1110                 ret = amdgpu_acpi_get_xcc_info(xcc_info, &bdf);
1111                 if (ret) {
1112                         kfree(xcc_info);
1113                         continue;
1114                 }
1115
1116                 dev_info = amdgpu_acpi_get_dev(bdf);
1117
1118                 if (!dev_info)
1119                         ret = amdgpu_acpi_dev_init(&dev_info, xcc_info, bdf);
1120
1121                 if (ret == -ENOMEM)
1122                         return ret;
1123
1124                 if (!dev_info) {
1125                         kfree(xcc_info);
1126                         continue;
1127                 }
1128
1129                 list_add_tail(&xcc_info->list, &dev_info->xcc_list);
1130         }
1131
1132         return 0;
1133 }
1134
1135 int amdgpu_acpi_get_tmr_info(struct amdgpu_device *adev, u64 *tmr_offset,
1136                              u64 *tmr_size)
1137 {
1138         struct amdgpu_acpi_dev_info *dev_info;
1139         u16 bdf;
1140
1141         if (!tmr_offset || !tmr_size)
1142                 return -EINVAL;
1143
1144         bdf = pci_dev_id(adev->pdev);
1145         dev_info = amdgpu_acpi_get_dev(bdf);
1146         if (!dev_info)
1147                 return -ENOENT;
1148
1149         *tmr_offset = dev_info->tmr_base;
1150         *tmr_size = dev_info->tmr_size;
1151
1152         return 0;
1153 }
1154
1155 int amdgpu_acpi_get_mem_info(struct amdgpu_device *adev, int xcc_id,
1156                              struct amdgpu_numa_info *numa_info)
1157 {
1158         struct amdgpu_acpi_dev_info *dev_info;
1159         struct amdgpu_acpi_xcc_info *xcc_info;
1160         u16 bdf;
1161
1162         if (!numa_info)
1163                 return -EINVAL;
1164
1165         bdf = pci_dev_id(adev->pdev);
1166         dev_info = amdgpu_acpi_get_dev(bdf);
1167         if (!dev_info)
1168                 return -ENOENT;
1169
1170         list_for_each_entry(xcc_info, &dev_info->xcc_list, list) {
1171                 if (xcc_info->phy_id == xcc_id) {
1172                         memcpy(numa_info, xcc_info->numa_info,
1173                                sizeof(*numa_info));
1174                         return 0;
1175                 }
1176         }
1177
1178         return -ENOENT;
1179 }
1180
1181 /**
1182  * amdgpu_acpi_event - handle notify events
1183  *
1184  * @nb: notifier block
1185  * @val: val
1186  * @data: acpi event
1187  *
1188  * Calls relevant amdgpu functions in response to various
1189  * acpi events.
1190  * Returns NOTIFY code
1191  */
1192 static int amdgpu_acpi_event(struct notifier_block *nb,
1193                              unsigned long val,
1194                              void *data)
1195 {
1196         struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb);
1197         struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
1198
1199         if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
1200                 if (power_supply_is_system_supplied() > 0)
1201                         DRM_DEBUG_DRIVER("pm: AC\n");
1202                 else
1203                         DRM_DEBUG_DRIVER("pm: DC\n");
1204
1205                 amdgpu_pm_acpi_event_handler(adev);
1206         }
1207
1208         /* Check for pending SBIOS requests */
1209         return amdgpu_atif_handler(adev, entry);
1210 }
1211
1212 /* Call all ACPI methods here */
1213 /**
1214  * amdgpu_acpi_init - init driver acpi support
1215  *
1216  * @adev: amdgpu_device pointer
1217  *
1218  * Verifies the AMD ACPI interfaces and registers with the acpi
1219  * notifier chain (all asics).
1220  * Returns 0 on success, error on failure.
1221  */
1222 int amdgpu_acpi_init(struct amdgpu_device *adev)
1223 {
1224         struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1225
1226         if (atif->notifications.brightness_change) {
1227                 if (adev->dc_enabled) {
1228 #if defined(CONFIG_DRM_AMD_DC)
1229                         struct amdgpu_display_manager *dm = &adev->dm;
1230
1231                         if (dm->backlight_dev[0])
1232                                 atif->bd = dm->backlight_dev[0];
1233 #endif
1234                 } else {
1235                         struct drm_encoder *tmp;
1236
1237                         /* Find the encoder controlling the brightness */
1238                         list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list,
1239                                             head) {
1240                                 struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
1241
1242                                 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
1243                                     enc->enc_priv) {
1244                                         struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
1245
1246                                         if (dig->bl_dev) {
1247                                                 atif->bd = dig->bl_dev;
1248                                                 break;
1249                                         }
1250                                 }
1251                         }
1252                 }
1253         }
1254         adev->acpi_nb.notifier_call = amdgpu_acpi_event;
1255         register_acpi_notifier(&adev->acpi_nb);
1256
1257         return 0;
1258 }
1259
1260 void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps)
1261 {
1262         struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1263
1264         caps->caps_valid = atif->backlight_caps.caps_valid;
1265         caps->min_input_signal = atif->backlight_caps.min_input_signal;
1266         caps->max_input_signal = atif->backlight_caps.max_input_signal;
1267 }
1268
1269 /**
1270  * amdgpu_acpi_fini - tear down driver acpi support
1271  *
1272  * @adev: amdgpu_device pointer
1273  *
1274  * Unregisters with the acpi notifier chain (all asics).
1275  */
1276 void amdgpu_acpi_fini(struct amdgpu_device *adev)
1277 {
1278         unregister_acpi_notifier(&adev->acpi_nb);
1279 }
1280
1281 /**
1282  * amdgpu_atif_pci_probe_handle - look up the ATIF handle
1283  *
1284  * @pdev: pci device
1285  *
1286  * Look up the ATIF handles (all asics).
1287  * Returns true if the handle is found, false if not.
1288  */
1289 static bool amdgpu_atif_pci_probe_handle(struct pci_dev *pdev)
1290 {
1291         char acpi_method_name[255] = { 0 };
1292         struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
1293         acpi_handle dhandle, atif_handle;
1294         acpi_status status;
1295         int ret;
1296
1297         dhandle = ACPI_HANDLE(&pdev->dev);
1298         if (!dhandle)
1299                 return false;
1300
1301         status = acpi_get_handle(dhandle, "ATIF", &atif_handle);
1302         if (ACPI_FAILURE(status))
1303                 return false;
1304
1305         amdgpu_acpi_priv.atif.handle = atif_handle;
1306         acpi_get_name(amdgpu_acpi_priv.atif.handle, ACPI_FULL_PATHNAME, &buffer);
1307         DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name);
1308         ret = amdgpu_atif_verify_interface(&amdgpu_acpi_priv.atif);
1309         if (ret) {
1310                 amdgpu_acpi_priv.atif.handle = 0;
1311                 return false;
1312         }
1313         return true;
1314 }
1315
1316 /**
1317  * amdgpu_atcs_pci_probe_handle - look up the ATCS handle
1318  *
1319  * @pdev: pci device
1320  *
1321  * Look up the ATCS handles (all asics).
1322  * Returns true if the handle is found, false if not.
1323  */
1324 static bool amdgpu_atcs_pci_probe_handle(struct pci_dev *pdev)
1325 {
1326         char acpi_method_name[255] = { 0 };
1327         struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name };
1328         acpi_handle dhandle, atcs_handle;
1329         acpi_status status;
1330         int ret;
1331
1332         dhandle = ACPI_HANDLE(&pdev->dev);
1333         if (!dhandle)
1334                 return false;
1335
1336         status = acpi_get_handle(dhandle, "ATCS", &atcs_handle);
1337         if (ACPI_FAILURE(status))
1338                 return false;
1339
1340         amdgpu_acpi_priv.atcs.handle = atcs_handle;
1341         acpi_get_name(amdgpu_acpi_priv.atcs.handle, ACPI_FULL_PATHNAME, &buffer);
1342         DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name);
1343         ret = amdgpu_atcs_verify_interface(&amdgpu_acpi_priv.atcs);
1344         if (ret) {
1345                 amdgpu_acpi_priv.atcs.handle = 0;
1346                 return false;
1347         }
1348         return true;
1349 }
1350
1351
1352 /**
1353  * amdgpu_acpi_should_gpu_reset
1354  *
1355  * @adev: amdgpu_device_pointer
1356  *
1357  * returns true if should reset GPU, false if not
1358  */
1359 bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev)
1360 {
1361         if ((adev->flags & AMD_IS_APU) &&
1362             adev->gfx.imu.funcs) /* Not need to do mode2 reset for IMU enabled APUs */
1363                 return false;
1364
1365         if ((adev->flags & AMD_IS_APU) &&
1366             amdgpu_acpi_is_s3_active(adev))
1367                 return false;
1368
1369         if (amdgpu_sriov_vf(adev))
1370                 return false;
1371
1372 #if IS_ENABLED(CONFIG_SUSPEND)
1373         return pm_suspend_target_state != PM_SUSPEND_TO_IDLE;
1374 #else
1375         return true;
1376 #endif
1377 }
1378
1379 /*
1380  * amdgpu_acpi_detect - detect ACPI ATIF/ATCS methods
1381  *
1382  * Check if we have the ATIF/ATCS methods and populate
1383  * the structures in the driver.
1384  */
1385 void amdgpu_acpi_detect(void)
1386 {
1387         struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1388         struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
1389         struct pci_dev *pdev = NULL;
1390         int ret;
1391
1392         while ((pdev = pci_get_base_class(PCI_BASE_CLASS_DISPLAY, pdev))) {
1393                 if ((pdev->class != PCI_CLASS_DISPLAY_VGA << 8) &&
1394                     (pdev->class != PCI_CLASS_DISPLAY_OTHER << 8))
1395                         continue;
1396
1397                 if (!atif->handle)
1398                         amdgpu_atif_pci_probe_handle(pdev);
1399                 if (!atcs->handle)
1400                         amdgpu_atcs_pci_probe_handle(pdev);
1401         }
1402
1403         if (atif->functions.sbios_requests && !atif->functions.system_params) {
1404                 /* XXX check this workraround, if sbios request function is
1405                  * present we have to see how it's configured in the system
1406                  * params
1407                  */
1408                 atif->functions.system_params = true;
1409         }
1410
1411         if (atif->functions.system_params) {
1412                 ret = amdgpu_atif_get_notification_params(atif);
1413                 if (ret) {
1414                         DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
1415                                         ret);
1416                         /* Disable notification */
1417                         atif->notification_cfg.enabled = false;
1418                 }
1419         }
1420
1421         if (atif->functions.query_backlight_transfer_characteristics) {
1422                 ret = amdgpu_atif_query_backlight_caps(atif);
1423                 if (ret) {
1424                         DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n",
1425                                         ret);
1426                         atif->backlight_caps.caps_valid = false;
1427                 }
1428         } else {
1429                 atif->backlight_caps.caps_valid = false;
1430         }
1431
1432         amdgpu_acpi_enumerate_xcc();
1433 }
1434
1435 void amdgpu_acpi_release(void)
1436 {
1437         struct amdgpu_acpi_dev_info *dev_info, *dev_tmp;
1438         struct amdgpu_acpi_xcc_info *xcc_info, *xcc_tmp;
1439         struct amdgpu_numa_info *numa_info;
1440         unsigned long index;
1441
1442         xa_for_each(&numa_info_xa, index, numa_info) {
1443                 kfree(numa_info);
1444                 xa_erase(&numa_info_xa, index);
1445         }
1446
1447         if (list_empty(&amdgpu_acpi_dev_list))
1448                 return;
1449
1450         list_for_each_entry_safe(dev_info, dev_tmp, &amdgpu_acpi_dev_list,
1451                                  list) {
1452                 list_for_each_entry_safe(xcc_info, xcc_tmp, &dev_info->xcc_list,
1453                                          list) {
1454                         list_del(&xcc_info->list);
1455                         kfree(xcc_info);
1456                 }
1457
1458                 list_del(&dev_info->list);
1459                 kfree(dev_info);
1460         }
1461 }
1462
1463 #if IS_ENABLED(CONFIG_SUSPEND)
1464 /**
1465  * amdgpu_acpi_is_s3_active
1466  *
1467  * @adev: amdgpu_device_pointer
1468  *
1469  * returns true if supported, false if not.
1470  */
1471 bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev)
1472 {
1473         return !(adev->flags & AMD_IS_APU) ||
1474                 (pm_suspend_target_state == PM_SUSPEND_MEM);
1475 }
1476
1477 /**
1478  * amdgpu_acpi_is_s0ix_active
1479  *
1480  * @adev: amdgpu_device_pointer
1481  *
1482  * returns true if supported, false if not.
1483  */
1484 bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev)
1485 {
1486         if (!(adev->flags & AMD_IS_APU) ||
1487             (pm_suspend_target_state != PM_SUSPEND_TO_IDLE))
1488                 return false;
1489
1490         if (adev->asic_type < CHIP_RAVEN)
1491                 return false;
1492
1493         /*
1494          * If ACPI_FADT_LOW_POWER_S0 is not set in the FADT, it is generally
1495          * risky to do any special firmware-related preparations for entering
1496          * S0ix even though the system is suspending to idle, so return false
1497          * in that case.
1498          */
1499         if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) {
1500                 dev_err_once(adev->dev,
1501                               "Power consumption will be higher as BIOS has not been configured for suspend-to-idle.\n"
1502                               "To use suspend-to-idle change the sleep mode in BIOS setup.\n");
1503                 return false;
1504         }
1505
1506 #if !IS_ENABLED(CONFIG_AMD_PMC)
1507         dev_err_once(adev->dev,
1508                       "Power consumption will be higher as the kernel has not been compiled with CONFIG_AMD_PMC.\n");
1509         return false;
1510 #else
1511         return true;
1512 #endif /* CONFIG_AMD_PMC */
1513 }
1514
1515 #endif /* CONFIG_SUSPEND */