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         uint32_t sbdf;
  72         uint16_t supp_xcp_mode;
  73         uint16_t xcp_mode;
  74         uint16_t mem_mode;
  75         uint64_t tmr_base;
  76         uint64_t tmr_size;
  77 };
  78
  79 struct list_head amdgpu_acpi_dev_list;
  80
  81 struct amdgpu_atif_notification_cfg {
  82         bool enabled;
  83         int command_code;
  84 };
  85
  86 struct amdgpu_atif_notifications {
  87         bool thermal_state;
  88         bool forced_power_state;
  89         bool system_power_state;
  90         bool brightness_change;
  91         bool dgpu_display_event;
  92         bool gpu_package_power_limit;
  93 };
  94
  95 struct amdgpu_atif_functions {
  96         bool system_params;
  97         bool sbios_requests;
  98         bool temperature_change;
  99         bool query_backlight_transfer_characteristics;
 100         bool ready_to_undock;
 101         bool external_gpu_information;
 102 };
 103
 104 struct amdgpu_atif {
 105         acpi_handle handle;
 106
 107         struct amdgpu_atif_notifications notifications;
 108         struct amdgpu_atif_functions functions;
 109         struct amdgpu_atif_notification_cfg notification_cfg;
 110         struct backlight_device *bd;
 111         struct amdgpu_dm_backlight_caps backlight_caps;
 112 };
 113
 114 struct amdgpu_atcs_functions {
 115         bool get_ext_state;
 116         bool pcie_perf_req;
 117         bool pcie_dev_rdy;
 118         bool pcie_bus_width;
 119         bool power_shift_control;
 120 };
 121
 122 struct amdgpu_atcs {
 123         acpi_handle handle;
 124
 125         struct amdgpu_atcs_functions functions;
 126 };
 127
 128 static struct amdgpu_acpi_priv {
 129         struct amdgpu_atif atif;
 130         struct amdgpu_atcs atcs;
 131 } amdgpu_acpi_priv;
 132
 133 /* Call the ATIF method
 134  */
 135 /**
 136  * amdgpu_atif_call - call an ATIF method
 137  *
 138  * @atif: atif structure
 139  * @function: the ATIF function to execute
 140  * @params: ATIF function params
 141  *
 142  * Executes the requested ATIF function (all asics).
 143  * Returns a pointer to the acpi output buffer.
 144  */
 145 static union acpi_object *amdgpu_atif_call(struct amdgpu_atif *atif,
 146                                            int function,
 147                                            struct acpi_buffer *params)
 148 {
 149         acpi_status status;
 150         union acpi_object *obj;
 151         union acpi_object atif_arg_elements[2];
 152         struct acpi_object_list atif_arg;
 153         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 154
 155         atif_arg.count = 2;
 156         atif_arg.pointer = &atif_arg_elements[0];
 157
 158         atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
 159         atif_arg_elements[0].integer.value = function;
 160
 161         if (params) {
 162                 atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
 163                 atif_arg_elements[1].buffer.length = params->length;
 164                 atif_arg_elements[1].buffer.pointer = params->pointer;
 165         } else {
 166                 /* We need a second fake parameter */
 167                 atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
 168                 atif_arg_elements[1].integer.value = 0;
 169         }
 170
 171         status = acpi_evaluate_object(atif->handle, NULL, &atif_arg,
 172                                       &buffer);
 173         obj = (union acpi_object *)buffer.pointer;
 174
 175         /* Fail if calling the method fails */
 176         if (ACPI_FAILURE(status)) {
 177                 DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
 178                                  acpi_format_exception(status));
 179                 kfree(obj);
 180                 return NULL;
 181         }
 182
 183         if (obj->type != ACPI_TYPE_BUFFER) {
 184                 DRM_DEBUG_DRIVER("bad object returned from ATIF: %d\n",
 185                                  obj->type);
 186                 kfree(obj);
 187                 return NULL;
 188         }
 189
 190         return obj;
 191 }
 192
 193 /**
 194  * amdgpu_atif_parse_notification - parse supported notifications
 195  *
 196  * @n: supported notifications struct
 197  * @mask: supported notifications mask from ATIF
 198  *
 199  * Use the supported notifications mask from ATIF function
 200  * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications
 201  * are supported (all asics).
 202  */
 203 static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask)
 204 {
 205         n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
 206         n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
 207         n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
 208         n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
 209         n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
 210         n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED;
 211 }
 212
 213 /**
 214  * amdgpu_atif_parse_functions - parse supported functions
 215  *
 216  * @f: supported functions struct
 217  * @mask: supported functions mask from ATIF
 218  *
 219  * Use the supported functions mask from ATIF function
 220  * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions
 221  * are supported (all asics).
 222  */
 223 static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask)
 224 {
 225         f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
 226         f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
 227         f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
 228         f->query_backlight_transfer_characteristics =
 229                 mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED;
 230         f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED;
 231         f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED;
 232 }
 233
 234 /**
 235  * amdgpu_atif_verify_interface - verify ATIF
 236  *
 237  * @atif: amdgpu atif struct
 238  *
 239  * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function
 240  * to initialize ATIF and determine what features are supported
 241  * (all asics).
 242  * returns 0 on success, error on failure.
 243  */
 244 static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif)
 245 {
 246         union acpi_object *info;
 247         struct atif_verify_interface output;
 248         size_t size;
 249         int err = 0;
 250
 251         info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
 252         if (!info)
 253                 return -EIO;
 254
 255         memset(&output, 0, sizeof(output));
 256
 257         size = *(u16 *) info->buffer.pointer;
 258         if (size < 12) {
 259                 DRM_INFO("ATIF buffer is too small: %zu\n", size);
 260                 err = -EINVAL;
 261                 goto out;
 262         }
 263         size = min(sizeof(output), size);
 264
 265         memcpy(&output, info->buffer.pointer, size);
 266
 267         /* TODO: check version? */
 268         DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
 269
 270         amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask);
 271         amdgpu_atif_parse_functions(&atif->functions, output.function_bits);
 272
 273 out:
 274         kfree(info);
 275         return err;
 276 }
 277
 278 /**
 279  * amdgpu_atif_get_notification_params - determine notify configuration
 280  *
 281  * @atif: acpi handle
 282  *
 283  * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function
 284  * to determine if a notifier is used and if so which one
 285  * (all asics).  This is either Notify(VGA, 0x81) or Notify(VGA, n)
 286  * where n is specified in the result if a notifier is used.
 287  * Returns 0 on success, error on failure.
 288  */
 289 static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif)
 290 {
 291         union acpi_object *info;
 292         struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg;
 293         struct atif_system_params params;
 294         size_t size;
 295         int err = 0;
 296
 297         info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS,
 298                                 NULL);
 299         if (!info) {
 300                 err = -EIO;
 301                 goto out;
 302         }
 303
 304         size = *(u16 *) info->buffer.pointer;
 305         if (size < 10) {
 306                 err = -EINVAL;
 307                 goto out;
 308         }
 309
 310         memset(&params, 0, sizeof(params));
 311         size = min(sizeof(params), size);
 312         memcpy(&params, info->buffer.pointer, size);
 313
 314         DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
 315                         params.flags, params.valid_mask);
 316         params.flags = params.flags & params.valid_mask;
 317
 318         if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
 319                 n->enabled = false;
 320                 n->command_code = 0;
 321         } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
 322                 n->enabled = true;
 323                 n->command_code = 0x81;
 324         } else {
 325                 if (size < 11) {
 326                         err = -EINVAL;
 327                         goto out;
 328                 }
 329                 n->enabled = true;
 330                 n->command_code = params.command_code;
 331         }
 332
 333 out:
 334         DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
 335                         (n->enabled ? "enabled" : "disabled"),
 336                         n->command_code);
 337         kfree(info);
 338         return err;
 339 }
 340
 341 /**
 342  * amdgpu_atif_query_backlight_caps - get min and max backlight input signal
 343  *
 344  * @atif: acpi handle
 345  *
 346  * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function
 347  * to determine the acceptable range of backlight values
 348  *
 349  * Backlight_caps.caps_valid will be set to true if the query is successful
 350  *
 351  * The input signals are in range 0-255
 352  *
 353  * This function assumes the display with backlight is the first LCD
 354  *
 355  * Returns 0 on success, error on failure.
 356  */
 357 static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif)
 358 {
 359         union acpi_object *info;
 360         struct atif_qbtc_output characteristics;
 361         struct atif_qbtc_arguments arguments;
 362         struct acpi_buffer params;
 363         size_t size;
 364         int err = 0;
 365
 366         arguments.size = sizeof(arguments);
 367         arguments.requested_display = ATIF_QBTC_REQUEST_LCD1;
 368
 369         params.length = sizeof(arguments);
 370         params.pointer = (void *)&arguments;
 371
 372         info = amdgpu_atif_call(atif,
 373                 ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS,
 374                 &params);
 375         if (!info) {
 376                 err = -EIO;
 377                 goto out;
 378         }
 379
 380         size = *(u16 *) info->buffer.pointer;
 381         if (size < 10) {
 382                 err = -EINVAL;
 383                 goto out;
 384         }
 385
 386         memset(&characteristics, 0, sizeof(characteristics));
 387         size = min(sizeof(characteristics), size);
 388         memcpy(&characteristics, info->buffer.pointer, size);
 389
 390         atif->backlight_caps.caps_valid = true;
 391         atif->backlight_caps.min_input_signal =
 392                         characteristics.min_input_signal;
 393         atif->backlight_caps.max_input_signal =
 394                         characteristics.max_input_signal;
 395         atif->backlight_caps.ac_level = characteristics.ac_level;
 396         atif->backlight_caps.dc_level = characteristics.dc_level;
 397 out:
 398         kfree(info);
 399         return err;
 400 }
 401
 402 /**
 403  * amdgpu_atif_get_sbios_requests - get requested sbios event
 404  *
 405  * @atif: acpi handle
 406  * @req: atif sbios request struct
 407  *
 408  * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
 409  * to determine what requests the sbios is making to the driver
 410  * (all asics).
 411  * Returns 0 on success, error on failure.
 412  */
 413 static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif,
 414                                           struct atif_sbios_requests *req)
 415 {
 416         union acpi_object *info;
 417         size_t size;
 418         int count = 0;
 419
 420         info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS,
 421                                 NULL);
 422         if (!info)
 423                 return -EIO;
 424
 425         size = *(u16 *)info->buffer.pointer;
 426         if (size < 0xd) {
 427                 count = -EINVAL;
 428                 goto out;
 429         }
 430         memset(req, 0, sizeof(*req));
 431
 432         size = min(sizeof(*req), size);
 433         memcpy(req, info->buffer.pointer, size);
 434         DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
 435
 436         count = hweight32(req->pending);
 437
 438 out:
 439         kfree(info);
 440         return count;
 441 }
 442
 443 /**
 444  * amdgpu_atif_handler - handle ATIF notify requests
 445  *
 446  * @adev: amdgpu_device pointer
 447  * @event: atif sbios request struct
 448  *
 449  * Checks the acpi event and if it matches an atif event,
 450  * handles it.
 451  *
 452  * Returns:
 453  * NOTIFY_BAD or NOTIFY_DONE, depending on the event.
 454  */
 455 static int amdgpu_atif_handler(struct amdgpu_device *adev,
 456                                struct acpi_bus_event *event)
 457 {
 458         struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
 459         int count;
 460
 461         DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
 462                         event->device_class, event->type);
 463
 464         if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
 465                 return NOTIFY_DONE;
 466
 467         /* Is this actually our event? */
 468         if (!atif->notification_cfg.enabled ||
 469             event->type != atif->notification_cfg.command_code) {
 470                 /* These events will generate keypresses otherwise */
 471                 if (event->type == ACPI_VIDEO_NOTIFY_PROBE)
 472                         return NOTIFY_BAD;
 473                 else
 474                         return NOTIFY_DONE;
 475         }
 476
 477         if (atif->functions.sbios_requests) {
 478                 struct atif_sbios_requests req;
 479
 480                 /* Check pending SBIOS requests */
 481                 count = amdgpu_atif_get_sbios_requests(atif, &req);
 482
 483                 if (count <= 0)
 484                         return NOTIFY_BAD;
 485
 486                 DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
 487
 488                 if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
 489                         if (atif->bd) {
 490                                 DRM_DEBUG_DRIVER("Changing brightness to %d\n",
 491                                                  req.backlight_level);
 492                                 /*
 493                                  * XXX backlight_device_set_brightness() is
 494                                  * hardwired to post BACKLIGHT_UPDATE_SYSFS.
 495                                  * It probably should accept 'reason' parameter.
 496                                  */
 497                                 backlight_device_set_brightness(atif->bd, req.backlight_level);
 498                         }
 499                 }
 500
 501                 if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
 502                         if (adev->flags & AMD_IS_PX) {
 503                                 pm_runtime_get_sync(adev_to_drm(adev)->dev);
 504                                 /* Just fire off a uevent and let userspace tell us what to do */
 505                                 drm_helper_hpd_irq_event(adev_to_drm(adev));
 506                                 pm_runtime_mark_last_busy(adev_to_drm(adev)->dev);
 507                                 pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
 508                         }
 509                 }
 510                 /* TODO: check other events */
 511         }
 512
 513         /* We've handled the event, stop the notifier chain. The ACPI interface
 514          * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
 515          * userspace if the event was generated only to signal a SBIOS
 516          * request.
 517          */
 518         return NOTIFY_BAD;
 519 }
 520
 521 /* Call the ATCS method
 522  */
 523 /**
 524  * amdgpu_atcs_call - call an ATCS method
 525  *
 526  * @atcs: atcs structure
 527  * @function: the ATCS function to execute
 528  * @params: ATCS function params
 529  *
 530  * Executes the requested ATCS function (all asics).
 531  * Returns a pointer to the acpi output buffer.
 532  */
 533 static union acpi_object *amdgpu_atcs_call(struct amdgpu_atcs *atcs,
 534                                            int function,
 535                                            struct acpi_buffer *params)
 536 {
 537         acpi_status status;
 538         union acpi_object atcs_arg_elements[2];
 539         struct acpi_object_list atcs_arg;
 540         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 541
 542         atcs_arg.count = 2;
 543         atcs_arg.pointer = &atcs_arg_elements[0];
 544
 545         atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
 546         atcs_arg_elements[0].integer.value = function;
 547
 548         if (params) {
 549                 atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
 550                 atcs_arg_elements[1].buffer.length = params->length;
 551                 atcs_arg_elements[1].buffer.pointer = params->pointer;
 552         } else {
 553                 /* We need a second fake parameter */
 554                 atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
 555                 atcs_arg_elements[1].integer.value = 0;
 556         }
 557
 558         status = acpi_evaluate_object(atcs->handle, NULL, &atcs_arg, &buffer);
 559
 560         /* Fail only if calling the method fails and ATIF is supported */
 561         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 562                 DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
 563                                  acpi_format_exception(status));
 564                 kfree(buffer.pointer);
 565                 return NULL;
 566         }
 567
 568         return buffer.pointer;
 569 }
 570
 571 /**
 572  * amdgpu_atcs_parse_functions - parse supported functions
 573  *
 574  * @f: supported functions struct
 575  * @mask: supported functions mask from ATCS
 576  *
 577  * Use the supported functions mask from ATCS function
 578  * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
 579  * are supported (all asics).
 580  */
 581 static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask)
 582 {
 583         f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
 584         f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
 585         f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
 586         f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
 587         f->power_shift_control = mask & ATCS_SET_POWER_SHIFT_CONTROL_SUPPORTED;
 588 }
 589
 590 /**
 591  * amdgpu_atcs_verify_interface - verify ATCS
 592  *
 593  * @atcs: amdgpu atcs struct
 594  *
 595  * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
 596  * to initialize ATCS and determine what features are supported
 597  * (all asics).
 598  * returns 0 on success, error on failure.
 599  */
 600 static int amdgpu_atcs_verify_interface(struct amdgpu_atcs *atcs)
 601 {
 602         union acpi_object *info;
 603         struct atcs_verify_interface output;
 604         size_t size;
 605         int err = 0;
 606
 607         info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
 608         if (!info)
 609                 return -EIO;
 610
 611         memset(&output, 0, sizeof(output));
 612
 613         size = *(u16 *) info->buffer.pointer;
 614         if (size < 8) {
 615                 DRM_INFO("ATCS buffer is too small: %zu\n", size);
 616                 err = -EINVAL;
 617                 goto out;
 618         }
 619         size = min(sizeof(output), size);
 620
 621         memcpy(&output, info->buffer.pointer, size);
 622
 623         /* TODO: check version? */
 624         DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
 625
 626         amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits);
 627
 628 out:
 629         kfree(info);
 630         return err;
 631 }
 632
 633 /**
 634  * amdgpu_acpi_is_pcie_performance_request_supported
 635  *
 636  * @adev: amdgpu_device pointer
 637  *
 638  * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods
 639  * are supported (all asics).
 640  * returns true if supported, false if not.
 641  */
 642 bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev)
 643 {
 644         struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
 645
 646         if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
 647                 return true;
 648
 649         return false;
 650 }
 651
 652 /**
 653  * amdgpu_acpi_is_power_shift_control_supported
 654  *
 655  * Check if the ATCS power shift control method
 656  * is supported.
 657  * returns true if supported, false if not.
 658  */
 659 bool amdgpu_acpi_is_power_shift_control_supported(void)
 660 {
 661         return amdgpu_acpi_priv.atcs.functions.power_shift_control;
 662 }
 663
 664 /**
 665  * amdgpu_acpi_pcie_notify_device_ready
 666  *
 667  * @adev: amdgpu_device pointer
 668  *
 669  * Executes the PCIE_DEVICE_READY_NOTIFICATION method
 670  * (all asics).
 671  * returns 0 on success, error on failure.
 672  */
 673 int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
 674 {
 675         union acpi_object *info;
 676         struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
 677
 678         if (!atcs->functions.pcie_dev_rdy)
 679                 return -EINVAL;
 680
 681         info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
 682         if (!info)
 683                 return -EIO;
 684
 685         kfree(info);
 686
 687         return 0;
 688 }
 689
 690 /**
 691  * amdgpu_acpi_pcie_performance_request
 692  *
 693  * @adev: amdgpu_device pointer
 694  * @perf_req: requested perf level (pcie gen speed)
 695  * @advertise: set advertise caps flag if set
 696  *
 697  * Executes the PCIE_PERFORMANCE_REQUEST method to
 698  * change the pcie gen speed (all asics).
 699  * returns 0 on success, error on failure.
 700  */
 701 int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
 702                                          u8 perf_req, bool advertise)
 703 {
 704         union acpi_object *info;
 705         struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
 706         struct atcs_pref_req_input atcs_input;
 707         struct atcs_pref_req_output atcs_output;
 708         struct acpi_buffer params;
 709         size_t size;
 710         u32 retry = 3;
 711
 712         if (amdgpu_acpi_pcie_notify_device_ready(adev))
 713                 return -EINVAL;
 714
 715         if (!atcs->functions.pcie_perf_req)
 716                 return -EINVAL;
 717
 718         atcs_input.size = sizeof(struct atcs_pref_req_input);
 719         /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
 720         atcs_input.client_id = pci_dev_id(adev->pdev);
 721         atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK;
 722         atcs_input.flags = ATCS_WAIT_FOR_COMPLETION;
 723         if (advertise)
 724                 atcs_input.flags |= ATCS_ADVERTISE_CAPS;
 725         atcs_input.req_type = ATCS_PCIE_LINK_SPEED;
 726         atcs_input.perf_req = perf_req;
 727
 728         params.length = sizeof(struct atcs_pref_req_input);
 729         params.pointer = &atcs_input;
 730
 731         while (retry--) {
 732                 info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, &params);
 733                 if (!info)
 734                         return -EIO;
 735
 736                 memset(&atcs_output, 0, sizeof(atcs_output));
 737
 738                 size = *(u16 *) info->buffer.pointer;
 739                 if (size < 3) {
 740                         DRM_INFO("ATCS buffer is too small: %zu\n", size);
 741                         kfree(info);
 742                         return -EINVAL;
 743                 }
 744                 size = min(sizeof(atcs_output), size);
 745
 746                 memcpy(&atcs_output, info->buffer.pointer, size);
 747
 748                 kfree(info);
 749
 750                 switch (atcs_output.ret_val) {
 751                 case ATCS_REQUEST_REFUSED:
 752                 default:
 753                         return -EINVAL;
 754                 case ATCS_REQUEST_COMPLETE:
 755                         return 0;
 756                 case ATCS_REQUEST_IN_PROGRESS:
 757                         udelay(10);
 758                         break;
 759                 }
 760         }
 761
 762         return 0;
 763 }
 764
 765 /**
 766  * amdgpu_acpi_power_shift_control
 767  *
 768  * @adev: amdgpu_device pointer
 769  * @dev_state: device acpi state
 770  * @drv_state: driver state
 771  *
 772  * Executes the POWER_SHIFT_CONTROL method to
 773  * communicate current dGPU device state and
 774  * driver state to APU/SBIOS.
 775  * returns 0 on success, error on failure.
 776  */
 777 int amdgpu_acpi_power_shift_control(struct amdgpu_device *adev,
 778                                     u8 dev_state, bool drv_state)
 779 {
 780         union acpi_object *info;
 781         struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
 782         struct atcs_pwr_shift_input atcs_input;
 783         struct acpi_buffer params;
 784
 785         if (!amdgpu_acpi_is_power_shift_control_supported())
 786                 return -EINVAL;
 787
 788         atcs_input.size = sizeof(struct atcs_pwr_shift_input);
 789         /* dGPU id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
 790         atcs_input.dgpu_id = pci_dev_id(adev->pdev);
 791         atcs_input.dev_acpi_state = dev_state;
 792         atcs_input.drv_state = drv_state;
 793
 794         params.length = sizeof(struct atcs_pwr_shift_input);
 795         params.pointer = &atcs_input;
 796
 797         info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_POWER_SHIFT_CONTROL, &params);
 798         if (!info) {
 799                 DRM_ERROR("ATCS PSC update failed\n");
 800                 return -EIO;
 801         }
 802
 803         return 0;
 804 }
 805
 806 /**
 807  * amdgpu_acpi_smart_shift_update - update dGPU device state to SBIOS
 808  *
 809  * @dev: drm_device pointer
 810  * @ss_state: current smart shift event
 811  *
 812  * returns 0 on success,
 813  * otherwise return error number.
 814  */
 815 int amdgpu_acpi_smart_shift_update(struct drm_device *dev, enum amdgpu_ss ss_state)
 816 {
 817         struct amdgpu_device *adev = drm_to_adev(dev);
 818         int r;
 819
 820         if (!amdgpu_device_supports_smart_shift(dev))
 821                 return 0;
 822
 823         switch (ss_state) {
 824         /* SBIOS trigger “stop”, “enable” and “start” at D0, Driver Operational.
 825          * SBIOS trigger “stop” at D3, Driver Not Operational.
 826          * SBIOS trigger “stop” and “disable” at D0, Driver NOT operational.
 827          */
 828         case AMDGPU_SS_DRV_LOAD:
 829                 r = amdgpu_acpi_power_shift_control(adev,
 830                                                     AMDGPU_ATCS_PSC_DEV_STATE_D0,
 831                                                     AMDGPU_ATCS_PSC_DRV_STATE_OPR);
 832                 break;
 833         case AMDGPU_SS_DEV_D0:
 834                 r = amdgpu_acpi_power_shift_control(adev,
 835                                                     AMDGPU_ATCS_PSC_DEV_STATE_D0,
 836                                                     AMDGPU_ATCS_PSC_DRV_STATE_OPR);
 837                 break;
 838         case AMDGPU_SS_DEV_D3:
 839                 r = amdgpu_acpi_power_shift_control(adev,
 840                                                     AMDGPU_ATCS_PSC_DEV_STATE_D3_HOT,
 841                                                     AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
 842                 break;
 843         case AMDGPU_SS_DRV_UNLOAD:
 844                 r = amdgpu_acpi_power_shift_control(adev,
 845                                                     AMDGPU_ATCS_PSC_DEV_STATE_D0,
 846                                                     AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
 847                 break;
 848         default:
 849                 return -EINVAL;
 850         }
 851
 852         return r;
 853 }
 854
 855 #ifdef CONFIG_ACPI_NUMA
 856 static inline uint64_t amdgpu_acpi_get_numa_size(int nid)
 857 {
 858         /* This is directly using si_meminfo_node implementation as the
 859          * function is not exported.
 860          */
 861         int zone_type;
 862         uint64_t managed_pages = 0;
 863
 864         pg_data_t *pgdat = NODE_DATA(nid);
 865
 866         for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++)
 867                 managed_pages +=
 868                         zone_managed_pages(&pgdat->node_zones[zone_type]);
 869         return managed_pages * PAGE_SIZE;
 870 }
 871
 872 static struct amdgpu_numa_info *amdgpu_acpi_get_numa_info(uint32_t pxm)
 873 {
 874         struct amdgpu_numa_info *numa_info;
 875         int nid;
 876
 877         numa_info = xa_load(&numa_info_xa, pxm);
 878
 879         if (!numa_info) {
 880                 struct sysinfo info;
 881
 882                 numa_info = kzalloc(sizeof(*numa_info), GFP_KERNEL);
 883                 if (!numa_info)
 884                         return NULL;
 885
 886                 nid = pxm_to_node(pxm);
 887                 numa_info->pxm = pxm;
 888                 numa_info->nid = nid;
 889
 890                 if (numa_info->nid == NUMA_NO_NODE) {
 891                         si_meminfo(&info);
 892                         numa_info->size = info.totalram * info.mem_unit;
 893                 } else {
 894                         numa_info->size = amdgpu_acpi_get_numa_size(nid);
 895                 }
 896                 xa_store(&numa_info_xa, numa_info->pxm, numa_info, GFP_KERNEL);
 897         }
 898
 899         return numa_info;
 900 }
 901 #endif
 902
 903 /**
 904  * amdgpu_acpi_get_node_id - obtain the NUMA node id for corresponding amdgpu
 905  * acpi device handle
 906  *
 907  * @handle: acpi handle
 908  * @numa_info: amdgpu_numa_info structure holding numa information
 909  *
 910  * Queries the ACPI interface to fetch the corresponding NUMA Node ID for a
 911  * given amdgpu acpi device.
 912  *
 913  * Returns ACPI STATUS OK with Node ID on success or the corresponding failure reason
 914  */
 915 static acpi_status amdgpu_acpi_get_node_id(acpi_handle handle,
 916                                     struct amdgpu_numa_info **numa_info)
 917 {
 918 #ifdef CONFIG_ACPI_NUMA
 919         u64 pxm;
 920         acpi_status status;
 921
 922         if (!numa_info)
 923                 return_ACPI_STATUS(AE_ERROR);
 924
 925         status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
 926
 927         if (ACPI_FAILURE(status))
 928                 return status;
 929
 930         *numa_info = amdgpu_acpi_get_numa_info(pxm);
 931
 932         if (!*numa_info)
 933                 return_ACPI_STATUS(AE_ERROR);
 934
 935         return_ACPI_STATUS(AE_OK);
 936 #else
 937         return_ACPI_STATUS(AE_NOT_EXIST);
 938 #endif
 939 }
 940
 941 static struct amdgpu_acpi_dev_info *amdgpu_acpi_get_dev(u32 sbdf)
 942 {
 943         struct amdgpu_acpi_dev_info *acpi_dev;
 944
 945         if (list_empty(&amdgpu_acpi_dev_list))
 946                 return NULL;
 947
 948         list_for_each_entry(acpi_dev, &amdgpu_acpi_dev_list, list)
 949                 if (acpi_dev->sbdf == sbdf)
 950                         return acpi_dev;
 951
 952         return NULL;
 953 }
 954
 955 static int amdgpu_acpi_dev_init(struct amdgpu_acpi_dev_info **dev_info,
 956                                 struct amdgpu_acpi_xcc_info *xcc_info, u32 sbdf)
 957 {
 958         struct amdgpu_acpi_dev_info *tmp;
 959         union acpi_object *obj;
 960         int ret = -ENOENT;
 961
 962         *dev_info = NULL;
 963         tmp = kzalloc(sizeof(struct amdgpu_acpi_dev_info), GFP_KERNEL);
 964         if (!tmp)
 965                 return -ENOMEM;
 966
 967         INIT_LIST_HEAD(&tmp->xcc_list);
 968         INIT_LIST_HEAD(&tmp->list);
 969         tmp->sbdf = sbdf;
 970
 971         obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
 972                                       AMD_XCC_DSM_GET_SUPP_MODE, NULL,
 973                                       ACPI_TYPE_INTEGER);
 974
 975         if (!obj) {
 976                 acpi_handle_debug(xcc_info->handle,
 977                                   "_DSM function %d evaluation failed",
 978                                   AMD_XCC_DSM_GET_SUPP_MODE);
 979                 ret = -ENOENT;
 980                 goto out;
 981         }
 982
 983         tmp->supp_xcp_mode = obj->integer.value & 0xFFFF;
 984         ACPI_FREE(obj);
 985
 986         obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
 987                                       AMD_XCC_DSM_GET_XCP_MODE, NULL,
 988                                       ACPI_TYPE_INTEGER);
 989
 990         if (!obj) {
 991                 acpi_handle_debug(xcc_info->handle,
 992                                   "_DSM function %d evaluation failed",
 993                                   AMD_XCC_DSM_GET_XCP_MODE);
 994                 ret = -ENOENT;
 995                 goto out;
 996         }
 997
 998         tmp->xcp_mode = obj->integer.value & 0xFFFF;
 999         tmp->mem_mode = (obj->integer.value >> 32) & 0xFFFF;
1000         ACPI_FREE(obj);
1001
1002         /* Evaluate DSMs and fill XCC information */
1003         obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1004                                       AMD_XCC_DSM_GET_TMR_INFO, NULL,
1005                                       ACPI_TYPE_PACKAGE);
1006
1007         if (!obj || obj->package.count < 2) {
1008                 acpi_handle_debug(xcc_info->handle,
1009                                   "_DSM function %d evaluation failed",
1010                                   AMD_XCC_DSM_GET_TMR_INFO);
1011                 ret = -ENOENT;
1012                 goto out;
1013         }
1014
1015         tmp->tmr_base = obj->package.elements[0].integer.value;
1016         tmp->tmr_size = obj->package.elements[1].integer.value;
1017         ACPI_FREE(obj);
1018
1019         DRM_DEBUG_DRIVER(
1020                 "New dev(%x): Supported xcp mode: %x curr xcp_mode : %x mem mode : %x, tmr base: %llx tmr size: %llx  ",
1021                 tmp->sbdf, tmp->supp_xcp_mode, tmp->xcp_mode, tmp->mem_mode,
1022                 tmp->tmr_base, tmp->tmr_size);
1023         list_add_tail(&tmp->list, &amdgpu_acpi_dev_list);
1024         *dev_info = tmp;
1025
1026         return 0;
1027
1028 out:
1029         if (obj)
1030                 ACPI_FREE(obj);
1031         kfree(tmp);
1032
1033         return ret;
1034 }
1035
1036 static int amdgpu_acpi_get_xcc_info(struct amdgpu_acpi_xcc_info *xcc_info,
1037                                     u32 *sbdf)
1038 {
1039         union acpi_object *obj;
1040         acpi_status status;
1041         int ret = -ENOENT;
1042
1043         obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1044                                       AMD_XCC_DSM_GET_NUM_FUNCS, NULL,
1045                                       ACPI_TYPE_INTEGER);
1046
1047         if (!obj || obj->integer.value != AMD_XCC_DSM_NUM_FUNCS)
1048                 goto out;
1049         ACPI_FREE(obj);
1050
1051         /* Evaluate DSMs and fill XCC information */
1052         obj = acpi_evaluate_dsm_typed(xcc_info->handle, &amd_xcc_dsm_guid, 0,
1053                                       AMD_XCC_DSM_GET_VF_XCC_MAPPING, NULL,
1054                                       ACPI_TYPE_INTEGER);
1055
1056         if (!obj) {
1057                 acpi_handle_debug(xcc_info->handle,
1058                                   "_DSM function %d evaluation failed",
1059                                   AMD_XCC_DSM_GET_VF_XCC_MAPPING);
1060                 ret = -EINVAL;
1061                 goto out;
1062         }
1063
1064         /* PF xcc id [39:32] */
1065         xcc_info->phy_id = (obj->integer.value >> 32) & 0xFF;
1066         /* xcp node of this xcc [47:40] */
1067         xcc_info->xcp_node = (obj->integer.value >> 40) & 0xFF;
1068         /* PF domain of this xcc [31:16] */
1069         *sbdf = (obj->integer.value) & 0xFFFF0000;
1070         /* PF bus/dev/fn of this xcc [63:48] */
1071         *sbdf |= (obj->integer.value >> 48) & 0xFFFF;
1072         ACPI_FREE(obj);
1073         obj = NULL;
1074
1075         status =
1076                 amdgpu_acpi_get_node_id(xcc_info->handle, &xcc_info->numa_info);
1077
1078         /* TODO: check if this check is required */
1079         if (ACPI_SUCCESS(status))
1080                 ret = 0;
1081 out:
1082         if (obj)
1083                 ACPI_FREE(obj);
1084
1085         return ret;
1086 }
1087
1088 static int amdgpu_acpi_enumerate_xcc(void)
1089 {
1090         struct amdgpu_acpi_dev_info *dev_info = NULL;
1091         struct amdgpu_acpi_xcc_info *xcc_info;
1092         struct acpi_device *acpi_dev;
1093         char hid[ACPI_ID_LEN];
1094         int ret, id;
1095         u32 sbdf;
1096
1097         INIT_LIST_HEAD(&amdgpu_acpi_dev_list);
1098         xa_init(&numa_info_xa);
1099
1100         for (id = 0; id < AMD_XCC_MAX_HID; id++) {
1101                 sprintf(hid, "%s%d", "AMD", AMD_XCC_HID_START + id);
1102                 acpi_dev = acpi_dev_get_first_match_dev(hid, NULL, -1);
1103                 /* These ACPI objects are expected to be in sequential order. If
1104                  * one is not found, no need to check the rest.
1105                  */
1106                 if (!acpi_dev) {
1107                         DRM_DEBUG_DRIVER("No matching acpi device found for %s",
1108                                          hid);
1109                         break;
1110                 }
1111
1112                 xcc_info = kzalloc(sizeof(struct amdgpu_acpi_xcc_info),
1113                                    GFP_KERNEL);
1114                 if (!xcc_info) {
1115                         DRM_ERROR("Failed to allocate memory for xcc info\n");
1116                         return -ENOMEM;
1117                 }
1118
1119                 INIT_LIST_HEAD(&xcc_info->list);
1120                 xcc_info->handle = acpi_device_handle(acpi_dev);
1121                 acpi_dev_put(acpi_dev);
1122
1123                 ret = amdgpu_acpi_get_xcc_info(xcc_info, &sbdf);
1124                 if (ret) {
1125                         kfree(xcc_info);
1126                         continue;
1127                 }
1128
1129                 dev_info = amdgpu_acpi_get_dev(sbdf);
1130
1131                 if (!dev_info)
1132                         ret = amdgpu_acpi_dev_init(&dev_info, xcc_info, sbdf);
1133
1134                 if (ret == -ENOMEM)
1135                         return ret;
1136
1137                 if (!dev_info) {
1138                         kfree(xcc_info);
1139                         continue;
1140                 }
1141
1142                 list_add_tail(&xcc_info->list, &dev_info->xcc_list);
1143         }
1144
1145         return 0;
1146 }
1147
1148 int amdgpu_acpi_get_tmr_info(struct amdgpu_device *adev, u64 *tmr_offset,
1149                              u64 *tmr_size)
1150 {
1151         struct amdgpu_acpi_dev_info *dev_info;
1152         u32 sbdf;
1153
1154         if (!tmr_offset || !tmr_size)
1155                 return -EINVAL;
1156
1157         sbdf = (pci_domain_nr(adev->pdev->bus) << 16);
1158         sbdf |= pci_dev_id(adev->pdev);
1159         dev_info = amdgpu_acpi_get_dev(sbdf);
1160         if (!dev_info)
1161                 return -ENOENT;
1162
1163         *tmr_offset = dev_info->tmr_base;
1164         *tmr_size = dev_info->tmr_size;
1165
1166         return 0;
1167 }
1168
1169 int amdgpu_acpi_get_mem_info(struct amdgpu_device *adev, int xcc_id,
1170                              struct amdgpu_numa_info *numa_info)
1171 {
1172         struct amdgpu_acpi_dev_info *dev_info;
1173         struct amdgpu_acpi_xcc_info *xcc_info;
1174         u32 sbdf;
1175
1176         if (!numa_info)
1177                 return -EINVAL;
1178
1179         sbdf = (pci_domain_nr(adev->pdev->bus) << 16);
1180         sbdf |= pci_dev_id(adev->pdev);
1181         dev_info = amdgpu_acpi_get_dev(sbdf);
1182         if (!dev_info)
1183                 return -ENOENT;
1184
1185         list_for_each_entry(xcc_info, &dev_info->xcc_list, list) {
1186                 if (xcc_info->phy_id == xcc_id) {
1187                         memcpy(numa_info, xcc_info->numa_info,
1188                                sizeof(*numa_info));
1189                         return 0;
1190                 }
1191         }
1192
1193         return -ENOENT;
1194 }
1195
1196 /**
1197  * amdgpu_acpi_event - handle notify events
1198  *
1199  * @nb: notifier block
1200  * @val: val
1201  * @data: acpi event
1202  *
1203  * Calls relevant amdgpu functions in response to various
1204  * acpi events.
1205  * Returns NOTIFY code
1206  */
1207 static int amdgpu_acpi_event(struct notifier_block *nb,
1208                              unsigned long val,
1209                              void *data)
1210 {
1211         struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb);
1212         struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
1213
1214         if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
1215                 if (power_supply_is_system_supplied() > 0)
1216                         DRM_DEBUG_DRIVER("pm: AC\n");
1217                 else
1218                         DRM_DEBUG_DRIVER("pm: DC\n");
1219
1220                 amdgpu_pm_acpi_event_handler(adev);
1221         }
1222
1223         /* Check for pending SBIOS requests */
1224         return amdgpu_atif_handler(adev, entry);
1225 }
1226
1227 /* Call all ACPI methods here */
1228 /**
1229  * amdgpu_acpi_init - init driver acpi support
1230  *
1231  * @adev: amdgpu_device pointer
1232  *
1233  * Verifies the AMD ACPI interfaces and registers with the acpi
1234  * notifier chain (all asics).
1235  * Returns 0 on success, error on failure.
1236  */
1237 int amdgpu_acpi_init(struct amdgpu_device *adev)
1238 {
1239         struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1240
1241         if (atif->notifications.brightness_change) {
1242                 if (adev->dc_enabled) {
1243 #if defined(CONFIG_DRM_AMD_DC)
1244                         struct amdgpu_display_manager *dm = &adev->dm;
1245
1246                         if (dm->backlight_dev[0])
1247                                 atif->bd = dm->backlight_dev[0];
1248 #endif
1249                 } else {
1250                         struct drm_encoder *tmp;
1251
1252                         /* Find the encoder controlling the brightness */
1253                         list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list,
1254                                             head) {
1255                                 struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
1256
1257                                 if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
1258                                     enc->enc_priv) {
1259                                         struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
1260
1261                                         if (dig->bl_dev) {
1262                                                 atif->bd = dig->bl_dev;
1263                                                 break;
1264                                         }
1265                                 }
1266                         }
1267                 }
1268         }
1269         adev->acpi_nb.notifier_call = amdgpu_acpi_event;
1270         register_acpi_notifier(&adev->acpi_nb);
1271
1272         return 0;
1273 }
1274
1275 void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps)
1276 {
1277         struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1278
1279         caps->caps_valid = atif->backlight_caps.caps_valid;
1280         caps->min_input_signal = atif->backlight_caps.min_input_signal;
1281         caps->max_input_signal = atif->backlight_caps.max_input_signal;
1282         caps->ac_level = atif->backlight_caps.ac_level;
1283         caps->dc_level = atif->backlight_caps.dc_level;
1284 }
1285
1286 /**
1287  * amdgpu_acpi_fini - tear down driver acpi support
1288  *
1289  * @adev: amdgpu_device pointer
1290  *
1291  * Unregisters with the acpi notifier chain (all asics).
1292  */
1293 void amdgpu_acpi_fini(struct amdgpu_device *adev)
1294 {
1295         unregister_acpi_notifier(&adev->acpi_nb);
1296 }
1297
1298 /**
1299  * amdgpu_atif_pci_probe_handle - look up the ATIF handle
1300  *
1301  * @pdev: pci device
1302  *
1303  * Look up the ATIF handles (all asics).
1304  * Returns true if the handle is found, false if not.
1305  */
1306 static bool amdgpu_atif_pci_probe_handle(struct pci_dev *pdev)
1307 {
1308         char acpi_method_name[255] = { 0 };
1309         struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
1310         acpi_handle dhandle, atif_handle;
1311         acpi_status status;
1312         int ret;
1313
1314         dhandle = ACPI_HANDLE(&pdev->dev);
1315         if (!dhandle)
1316                 return false;
1317
1318         status = acpi_get_handle(dhandle, "ATIF", &atif_handle);
1319         if (ACPI_FAILURE(status))
1320                 return false;
1321
1322         amdgpu_acpi_priv.atif.handle = atif_handle;
1323         acpi_get_name(amdgpu_acpi_priv.atif.handle, ACPI_FULL_PATHNAME, &buffer);
1324         DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name);
1325         ret = amdgpu_atif_verify_interface(&amdgpu_acpi_priv.atif);
1326         if (ret) {
1327                 amdgpu_acpi_priv.atif.handle = 0;
1328                 return false;
1329         }
1330         return true;
1331 }
1332
1333 /**
1334  * amdgpu_atcs_pci_probe_handle - look up the ATCS handle
1335  *
1336  * @pdev: pci device
1337  *
1338  * Look up the ATCS handles (all asics).
1339  * Returns true if the handle is found, false if not.
1340  */
1341 static bool amdgpu_atcs_pci_probe_handle(struct pci_dev *pdev)
1342 {
1343         char acpi_method_name[255] = { 0 };
1344         struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name };
1345         acpi_handle dhandle, atcs_handle;
1346         acpi_status status;
1347         int ret;
1348
1349         dhandle = ACPI_HANDLE(&pdev->dev);
1350         if (!dhandle)
1351                 return false;
1352
1353         status = acpi_get_handle(dhandle, "ATCS", &atcs_handle);
1354         if (ACPI_FAILURE(status))
1355                 return false;
1356
1357         amdgpu_acpi_priv.atcs.handle = atcs_handle;
1358         acpi_get_name(amdgpu_acpi_priv.atcs.handle, ACPI_FULL_PATHNAME, &buffer);
1359         DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name);
1360         ret = amdgpu_atcs_verify_interface(&amdgpu_acpi_priv.atcs);
1361         if (ret) {
1362                 amdgpu_acpi_priv.atcs.handle = 0;
1363                 return false;
1364         }
1365         return true;
1366 }
1367
1368
1369 /**
1370  * amdgpu_acpi_should_gpu_reset
1371  *
1372  * @adev: amdgpu_device_pointer
1373  *
1374  * returns true if should reset GPU, false if not
1375  */
1376 bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev)
1377 {
1378         if ((adev->flags & AMD_IS_APU) &&
1379             adev->gfx.imu.funcs) /* Not need to do mode2 reset for IMU enabled APUs */
1380                 return false;
1381
1382         if ((adev->flags & AMD_IS_APU) &&
1383             amdgpu_acpi_is_s3_active(adev))
1384                 return false;
1385
1386         if (amdgpu_sriov_vf(adev))
1387                 return false;
1388
1389 #if IS_ENABLED(CONFIG_SUSPEND)
1390         return pm_suspend_target_state != PM_SUSPEND_TO_IDLE;
1391 #else
1392         return true;
1393 #endif
1394 }
1395
1396 /*
1397  * amdgpu_acpi_detect - detect ACPI ATIF/ATCS methods
1398  *
1399  * Check if we have the ATIF/ATCS methods and populate
1400  * the structures in the driver.
1401  */
1402 void amdgpu_acpi_detect(void)
1403 {
1404         struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
1405         struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
1406         struct pci_dev *pdev = NULL;
1407         int ret;
1408
1409         while ((pdev = pci_get_base_class(PCI_BASE_CLASS_DISPLAY, pdev))) {
1410                 if ((pdev->class != PCI_CLASS_DISPLAY_VGA << 8) &&
1411                     (pdev->class != PCI_CLASS_DISPLAY_OTHER << 8))
1412                         continue;
1413
1414                 if (!atif->handle)
1415                         amdgpu_atif_pci_probe_handle(pdev);
1416                 if (!atcs->handle)
1417                         amdgpu_atcs_pci_probe_handle(pdev);
1418         }
1419
1420         if (atif->functions.sbios_requests && !atif->functions.system_params) {
1421                 /* XXX check this workraround, if sbios request function is
1422                  * present we have to see how it's configured in the system
1423                  * params
1424                  */
1425                 atif->functions.system_params = true;
1426         }
1427
1428         if (atif->functions.system_params) {
1429                 ret = amdgpu_atif_get_notification_params(atif);
1430                 if (ret) {
1431                         DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
1432                                         ret);
1433                         /* Disable notification */
1434                         atif->notification_cfg.enabled = false;
1435                 }
1436         }
1437
1438         if (atif->functions.query_backlight_transfer_characteristics) {
1439                 ret = amdgpu_atif_query_backlight_caps(atif);
1440                 if (ret) {
1441                         DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n",
1442                                         ret);
1443                         atif->backlight_caps.caps_valid = false;
1444                 }
1445         } else {
1446                 atif->backlight_caps.caps_valid = false;
1447         }
1448
1449         amdgpu_acpi_enumerate_xcc();
1450 }
1451
1452 void amdgpu_acpi_release(void)
1453 {
1454         struct amdgpu_acpi_dev_info *dev_info, *dev_tmp;
1455         struct amdgpu_acpi_xcc_info *xcc_info, *xcc_tmp;
1456         struct amdgpu_numa_info *numa_info;
1457         unsigned long index;
1458
1459         xa_for_each(&numa_info_xa, index, numa_info) {
1460                 kfree(numa_info);
1461                 xa_erase(&numa_info_xa, index);
1462         }
1463
1464         if (list_empty(&amdgpu_acpi_dev_list))
1465                 return;
1466
1467         list_for_each_entry_safe(dev_info, dev_tmp, &amdgpu_acpi_dev_list,
1468                                  list) {
1469                 list_for_each_entry_safe(xcc_info, xcc_tmp, &dev_info->xcc_list,
1470                                          list) {
1471                         list_del(&xcc_info->list);
1472                         kfree(xcc_info);
1473                 }
1474
1475                 list_del(&dev_info->list);
1476                 kfree(dev_info);
1477         }
1478 }
1479
1480 #if IS_ENABLED(CONFIG_SUSPEND)
1481 /**
1482  * amdgpu_acpi_is_s3_active
1483  *
1484  * @adev: amdgpu_device_pointer
1485  *
1486  * returns true if supported, false if not.
1487  */
1488 bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev)
1489 {
1490         return !(adev->flags & AMD_IS_APU) ||
1491                 (pm_suspend_target_state == PM_SUSPEND_MEM);
1492 }
1493
1494 /**
1495  * amdgpu_acpi_is_s0ix_active
1496  *
1497  * @adev: amdgpu_device_pointer
1498  *
1499  * returns true if supported, false if not.
1500  */
1501 bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev)
1502 {
1503         if (!(adev->flags & AMD_IS_APU) ||
1504             (pm_suspend_target_state != PM_SUSPEND_TO_IDLE))
1505                 return false;
1506
1507         if (adev->asic_type < CHIP_RAVEN)
1508                 return false;
1509
1510         if (!(adev->pm.pp_feature & PP_GFXOFF_MASK))
1511                 return false;
1512
1513         /*
1514          * If ACPI_FADT_LOW_POWER_S0 is not set in the FADT, it is generally
1515          * risky to do any special firmware-related preparations for entering
1516          * S0ix even though the system is suspending to idle, so return false
1517          * in that case.
1518          */
1519         if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) {
1520                 dev_err_once(adev->dev,
1521                               "Power consumption will be higher as BIOS has not been configured for suspend-to-idle.\n"
1522                               "To use suspend-to-idle change the sleep mode in BIOS setup.\n");
1523                 return false;
1524         }
1525
1526 #if !IS_ENABLED(CONFIG_AMD_PMC)
1527         dev_err_once(adev->dev,
1528                       "Power consumption will be higher as the kernel has not been compiled with CONFIG_AMD_PMC.\n");
1529         return false;
1530 #else
1531         return true;
1532 #endif /* CONFIG_AMD_PMC */
1533 }
1534
1535 /**
1536  * amdgpu_choose_low_power_state
1537  *
1538  * @adev: amdgpu_device_pointer
1539  *
1540  * Choose the target low power state for the GPU
1541  */
1542 void amdgpu_choose_low_power_state(struct amdgpu_device *adev)
1543 {
1544         if (adev->in_runpm)
1545                 return;
1546
1547         if (amdgpu_acpi_is_s0ix_active(adev))
1548                 adev->in_s0ix = true;
1549         else if (amdgpu_acpi_is_s3_active(adev))
1550                 adev->in_s3 = true;
1551 }
1552
1553 #endif /* CONFIG_SUSPEND */