drivers/gpu/drm/etnaviv/etnaviv_gpu.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2015-2018 Etnaviv Project
   4  */
   5
   6 #include <linux/clk.h>
   7 #include <linux/component.h>
   8 #include <linux/delay.h>
   9 #include <linux/dma-fence.h>
  10 #include <linux/dma-mapping.h>
  11 #include <linux/module.h>
  12 #include <linux/of_device.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/pm_runtime.h>
  15 #include <linux/regulator/consumer.h>
  16 #include <linux/thermal.h>
  17
  18 #include "etnaviv_cmdbuf.h"
  19 #include "etnaviv_dump.h"
  20 #include "etnaviv_gpu.h"
  21 #include "etnaviv_gem.h"
  22 #include "etnaviv_mmu.h"
  23 #include "etnaviv_perfmon.h"
  24 #include "etnaviv_sched.h"
  25 #include "common.xml.h"
  26 #include "state.xml.h"
  27 #include "state_hi.xml.h"
  28 #include "cmdstream.xml.h"
  29
  30 static const struct platform_device_id gpu_ids[] = {
  31         { .name = "etnaviv-gpu,2d" },
  32         { },
  33 };
  34
  35 /*
  36  * Driver functions:
  37  */
  38
  39 int etnaviv_gpu_get_param(struct etnaviv_gpu *gpu, u32 param, u64 *value)
  40 {
  41         struct etnaviv_drm_private *priv = gpu->drm->dev_private;
  42
  43         switch (param) {
  44         case ETNAVIV_PARAM_GPU_MODEL:
  45                 *value = gpu->identity.model;
  46                 break;
  47
  48         case ETNAVIV_PARAM_GPU_REVISION:
  49                 *value = gpu->identity.revision;
  50                 break;
  51
  52         case ETNAVIV_PARAM_GPU_FEATURES_0:
  53                 *value = gpu->identity.features;
  54                 break;
  55
  56         case ETNAVIV_PARAM_GPU_FEATURES_1:
  57                 *value = gpu->identity.minor_features0;
  58                 break;
  59
  60         case ETNAVIV_PARAM_GPU_FEATURES_2:
  61                 *value = gpu->identity.minor_features1;
  62                 break;
  63
  64         case ETNAVIV_PARAM_GPU_FEATURES_3:
  65                 *value = gpu->identity.minor_features2;
  66                 break;
  67
  68         case ETNAVIV_PARAM_GPU_FEATURES_4:
  69                 *value = gpu->identity.minor_features3;
  70                 break;
  71
  72         case ETNAVIV_PARAM_GPU_FEATURES_5:
  73                 *value = gpu->identity.minor_features4;
  74                 break;
  75
  76         case ETNAVIV_PARAM_GPU_FEATURES_6:
  77                 *value = gpu->identity.minor_features5;
  78                 break;
  79
  80         case ETNAVIV_PARAM_GPU_FEATURES_7:
  81                 *value = gpu->identity.minor_features6;
  82                 break;
  83
  84         case ETNAVIV_PARAM_GPU_FEATURES_8:
  85                 *value = gpu->identity.minor_features7;
  86                 break;
  87
  88         case ETNAVIV_PARAM_GPU_FEATURES_9:
  89                 *value = gpu->identity.minor_features8;
  90                 break;
  91
  92         case ETNAVIV_PARAM_GPU_FEATURES_10:
  93                 *value = gpu->identity.minor_features9;
  94                 break;
  95
  96         case ETNAVIV_PARAM_GPU_FEATURES_11:
  97                 *value = gpu->identity.minor_features10;
  98                 break;
  99
 100         case ETNAVIV_PARAM_GPU_FEATURES_12:
 101                 *value = gpu->identity.minor_features11;
 102                 break;
 103
 104         case ETNAVIV_PARAM_GPU_STREAM_COUNT:
 105                 *value = gpu->identity.stream_count;
 106                 break;
 107
 108         case ETNAVIV_PARAM_GPU_REGISTER_MAX:
 109                 *value = gpu->identity.register_max;
 110                 break;
 111
 112         case ETNAVIV_PARAM_GPU_THREAD_COUNT:
 113                 *value = gpu->identity.thread_count;
 114                 break;
 115
 116         case ETNAVIV_PARAM_GPU_VERTEX_CACHE_SIZE:
 117                 *value = gpu->identity.vertex_cache_size;
 118                 break;
 119
 120         case ETNAVIV_PARAM_GPU_SHADER_CORE_COUNT:
 121                 *value = gpu->identity.shader_core_count;
 122                 break;
 123
 124         case ETNAVIV_PARAM_GPU_PIXEL_PIPES:
 125                 *value = gpu->identity.pixel_pipes;
 126                 break;
 127
 128         case ETNAVIV_PARAM_GPU_VERTEX_OUTPUT_BUFFER_SIZE:
 129                 *value = gpu->identity.vertex_output_buffer_size;
 130                 break;
 131
 132         case ETNAVIV_PARAM_GPU_BUFFER_SIZE:
 133                 *value = gpu->identity.buffer_size;
 134                 break;
 135
 136         case ETNAVIV_PARAM_GPU_INSTRUCTION_COUNT:
 137                 *value = gpu->identity.instruction_count;
 138                 break;
 139
 140         case ETNAVIV_PARAM_GPU_NUM_CONSTANTS:
 141                 *value = gpu->identity.num_constants;
 142                 break;
 143
 144         case ETNAVIV_PARAM_GPU_NUM_VARYINGS:
 145                 *value = gpu->identity.varyings_count;
 146                 break;
 147
 148         case ETNAVIV_PARAM_SOFTPIN_START_ADDR:
 149                 if (priv->mmu_global->version == ETNAVIV_IOMMU_V2)
 150                         *value = ETNAVIV_SOFTPIN_START_ADDRESS;
 151                 else
 152                         *value = ~0ULL;
 153                 break;
 154
 155         case ETNAVIV_PARAM_GPU_PRODUCT_ID:
 156                 *value = gpu->identity.product_id;
 157                 break;
 158
 159         case ETNAVIV_PARAM_GPU_CUSTOMER_ID:
 160                 *value = gpu->identity.customer_id;
 161                 break;
 162
 163         case ETNAVIV_PARAM_GPU_ECO_ID:
 164                 *value = gpu->identity.eco_id;
 165                 break;
 166
 167         default:
 168                 DBG("%s: invalid param: %u", dev_name(gpu->dev), param);
 169                 return -EINVAL;
 170         }
 171
 172         return 0;
 173 }
 174
 175
 176 #define etnaviv_is_model_rev(gpu, mod, rev) \
 177         ((gpu)->identity.model == chipModel_##mod && \
 178          (gpu)->identity.revision == rev)
 179 #define etnaviv_field(val, field) \
 180         (((val) & field##__MASK) >> field##__SHIFT)
 181
 182 static void etnaviv_hw_specs(struct etnaviv_gpu *gpu)
 183 {
 184         if (gpu->identity.minor_features0 &
 185             chipMinorFeatures0_MORE_MINOR_FEATURES) {
 186                 u32 specs[4];
 187                 unsigned int streams;
 188
 189                 specs[0] = gpu_read(gpu, VIVS_HI_CHIP_SPECS);
 190                 specs[1] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_2);
 191                 specs[2] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_3);
 192                 specs[3] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_4);
 193
 194                 gpu->identity.stream_count = etnaviv_field(specs[0],
 195                                         VIVS_HI_CHIP_SPECS_STREAM_COUNT);
 196                 gpu->identity.register_max = etnaviv_field(specs[0],
 197                                         VIVS_HI_CHIP_SPECS_REGISTER_MAX);
 198                 gpu->identity.thread_count = etnaviv_field(specs[0],
 199                                         VIVS_HI_CHIP_SPECS_THREAD_COUNT);
 200                 gpu->identity.vertex_cache_size = etnaviv_field(specs[0],
 201                                         VIVS_HI_CHIP_SPECS_VERTEX_CACHE_SIZE);
 202                 gpu->identity.shader_core_count = etnaviv_field(specs[0],
 203                                         VIVS_HI_CHIP_SPECS_SHADER_CORE_COUNT);
 204                 gpu->identity.pixel_pipes = etnaviv_field(specs[0],
 205                                         VIVS_HI_CHIP_SPECS_PIXEL_PIPES);
 206                 gpu->identity.vertex_output_buffer_size =
 207                         etnaviv_field(specs[0],
 208                                 VIVS_HI_CHIP_SPECS_VERTEX_OUTPUT_BUFFER_SIZE);
 209
 210                 gpu->identity.buffer_size = etnaviv_field(specs[1],
 211                                         VIVS_HI_CHIP_SPECS_2_BUFFER_SIZE);
 212                 gpu->identity.instruction_count = etnaviv_field(specs[1],
 213                                         VIVS_HI_CHIP_SPECS_2_INSTRUCTION_COUNT);
 214                 gpu->identity.num_constants = etnaviv_field(specs[1],
 215                                         VIVS_HI_CHIP_SPECS_2_NUM_CONSTANTS);
 216
 217                 gpu->identity.varyings_count = etnaviv_field(specs[2],
 218                                         VIVS_HI_CHIP_SPECS_3_VARYINGS_COUNT);
 219
 220                 /* This overrides the value from older register if non-zero */
 221                 streams = etnaviv_field(specs[3],
 222                                         VIVS_HI_CHIP_SPECS_4_STREAM_COUNT);
 223                 if (streams)
 224                         gpu->identity.stream_count = streams;
 225         }
 226
 227         /* Fill in the stream count if not specified */
 228         if (gpu->identity.stream_count == 0) {
 229                 if (gpu->identity.model >= 0x1000)
 230                         gpu->identity.stream_count = 4;
 231                 else
 232                         gpu->identity.stream_count = 1;
 233         }
 234
 235         /* Convert the register max value */
 236         if (gpu->identity.register_max)
 237                 gpu->identity.register_max = 1 << gpu->identity.register_max;
 238         else if (gpu->identity.model == chipModel_GC400)
 239                 gpu->identity.register_max = 32;
 240         else
 241                 gpu->identity.register_max = 64;
 242
 243         /* Convert thread count */
 244         if (gpu->identity.thread_count)
 245                 gpu->identity.thread_count = 1 << gpu->identity.thread_count;
 246         else if (gpu->identity.model == chipModel_GC400)
 247                 gpu->identity.thread_count = 64;
 248         else if (gpu->identity.model == chipModel_GC500 ||
 249                  gpu->identity.model == chipModel_GC530)
 250                 gpu->identity.thread_count = 128;
 251         else
 252                 gpu->identity.thread_count = 256;
 253
 254         if (gpu->identity.vertex_cache_size == 0)
 255                 gpu->identity.vertex_cache_size = 8;
 256
 257         if (gpu->identity.shader_core_count == 0) {
 258                 if (gpu->identity.model >= 0x1000)
 259                         gpu->identity.shader_core_count = 2;
 260                 else
 261                         gpu->identity.shader_core_count = 1;
 262         }
 263
 264         if (gpu->identity.pixel_pipes == 0)
 265                 gpu->identity.pixel_pipes = 1;
 266
 267         /* Convert virtex buffer size */
 268         if (gpu->identity.vertex_output_buffer_size) {
 269                 gpu->identity.vertex_output_buffer_size =
 270                         1 << gpu->identity.vertex_output_buffer_size;
 271         } else if (gpu->identity.model == chipModel_GC400) {
 272                 if (gpu->identity.revision < 0x4000)
 273                         gpu->identity.vertex_output_buffer_size = 512;
 274                 else if (gpu->identity.revision < 0x4200)
 275                         gpu->identity.vertex_output_buffer_size = 256;
 276                 else
 277                         gpu->identity.vertex_output_buffer_size = 128;
 278         } else {
 279                 gpu->identity.vertex_output_buffer_size = 512;
 280         }
 281
 282         switch (gpu->identity.instruction_count) {
 283         case 0:
 284                 if (etnaviv_is_model_rev(gpu, GC2000, 0x5108) ||
 285                     gpu->identity.model == chipModel_GC880)
 286                         gpu->identity.instruction_count = 512;
 287                 else
 288                         gpu->identity.instruction_count = 256;
 289                 break;
 290
 291         case 1:
 292                 gpu->identity.instruction_count = 1024;
 293                 break;
 294
 295         case 2:
 296                 gpu->identity.instruction_count = 2048;
 297                 break;
 298
 299         default:
 300                 gpu->identity.instruction_count = 256;
 301                 break;
 302         }
 303
 304         if (gpu->identity.num_constants == 0)
 305                 gpu->identity.num_constants = 168;
 306
 307         if (gpu->identity.varyings_count == 0) {
 308                 if (gpu->identity.minor_features1 & chipMinorFeatures1_HALTI0)
 309                         gpu->identity.varyings_count = 12;
 310                 else
 311                         gpu->identity.varyings_count = 8;
 312         }
 313
 314         /*
 315          * For some cores, two varyings are consumed for position, so the
 316          * maximum varying count needs to be reduced by one.
 317          */
 318         if (etnaviv_is_model_rev(gpu, GC5000, 0x5434) ||
 319             etnaviv_is_model_rev(gpu, GC4000, 0x5222) ||
 320             etnaviv_is_model_rev(gpu, GC4000, 0x5245) ||
 321             etnaviv_is_model_rev(gpu, GC4000, 0x5208) ||
 322             etnaviv_is_model_rev(gpu, GC3000, 0x5435) ||
 323             etnaviv_is_model_rev(gpu, GC2200, 0x5244) ||
 324             etnaviv_is_model_rev(gpu, GC2100, 0x5108) ||
 325             etnaviv_is_model_rev(gpu, GC2000, 0x5108) ||
 326             etnaviv_is_model_rev(gpu, GC1500, 0x5246) ||
 327             etnaviv_is_model_rev(gpu, GC880, 0x5107) ||
 328             etnaviv_is_model_rev(gpu, GC880, 0x5106))
 329                 gpu->identity.varyings_count -= 1;
 330 }
 331
 332 static void etnaviv_hw_identify(struct etnaviv_gpu *gpu)
 333 {
 334         u32 chipIdentity;
 335
 336         chipIdentity = gpu_read(gpu, VIVS_HI_CHIP_IDENTITY);
 337
 338         /* Special case for older graphic cores. */
 339         if (etnaviv_field(chipIdentity, VIVS_HI_CHIP_IDENTITY_FAMILY) == 0x01) {
 340                 gpu->identity.model    = chipModel_GC500;
 341                 gpu->identity.revision = etnaviv_field(chipIdentity,
 342                                          VIVS_HI_CHIP_IDENTITY_REVISION);
 343         } else {
 344                 u32 chipDate = gpu_read(gpu, VIVS_HI_CHIP_DATE);
 345
 346                 gpu->identity.model = gpu_read(gpu, VIVS_HI_CHIP_MODEL);
 347                 gpu->identity.revision = gpu_read(gpu, VIVS_HI_CHIP_REV);
 348                 gpu->identity.customer_id = gpu_read(gpu, VIVS_HI_CHIP_CUSTOMER_ID);
 349
 350                 /*
 351                  * Reading these two registers on GC600 rev 0x19 result in a
 352                  * unhandled fault: external abort on non-linefetch
 353                  */
 354                 if (!etnaviv_is_model_rev(gpu, GC600, 0x19)) {
 355                         gpu->identity.product_id = gpu_read(gpu, VIVS_HI_CHIP_PRODUCT_ID);
 356                         gpu->identity.eco_id = gpu_read(gpu, VIVS_HI_CHIP_ECO_ID);
 357                 }
 358
 359                 /*
 360                  * !!!! HACK ALERT !!!!
 361                  * Because people change device IDs without letting software
 362                  * know about it - here is the hack to make it all look the
 363                  * same.  Only for GC400 family.
 364                  */
 365                 if ((gpu->identity.model & 0xff00) == 0x0400 &&
 366                     gpu->identity.model != chipModel_GC420) {
 367                         gpu->identity.model = gpu->identity.model & 0x0400;
 368                 }
 369
 370                 /* Another special case */
 371                 if (etnaviv_is_model_rev(gpu, GC300, 0x2201)) {
 372                         u32 chipTime = gpu_read(gpu, VIVS_HI_CHIP_TIME);
 373
 374                         if (chipDate == 0x20080814 && chipTime == 0x12051100) {
 375                                 /*
 376                                  * This IP has an ECO; put the correct
 377                                  * revision in it.
 378                                  */
 379                                 gpu->identity.revision = 0x1051;
 380                         }
 381                 }
 382
 383                 /*
 384                  * NXP likes to call the GPU on the i.MX6QP GC2000+, but in
 385                  * reality it's just a re-branded GC3000. We can identify this
 386                  * core by the upper half of the revision register being all 1.
 387                  * Fix model/rev here, so all other places can refer to this
 388                  * core by its real identity.
 389                  */
 390                 if (etnaviv_is_model_rev(gpu, GC2000, 0xffff5450)) {
 391                         gpu->identity.model = chipModel_GC3000;
 392                         gpu->identity.revision &= 0xffff;
 393                 }
 394
 395                 if (etnaviv_is_model_rev(gpu, GC1000, 0x5037) && (chipDate == 0x20120617))
 396                         gpu->identity.eco_id = 1;
 397
 398                 if (etnaviv_is_model_rev(gpu, GC320, 0x5303) && (chipDate == 0x20140511))
 399                         gpu->identity.eco_id = 1;
 400         }
 401
 402         dev_info(gpu->dev, "model: GC%x, revision: %x\n",
 403                  gpu->identity.model, gpu->identity.revision);
 404
 405         gpu->idle_mask = ~VIVS_HI_IDLE_STATE_AXI_LP;
 406         /*
 407          * If there is a match in the HWDB, we aren't interested in the
 408          * remaining register values, as they might be wrong.
 409          */
 410         if (etnaviv_fill_identity_from_hwdb(gpu))
 411                 return;
 412
 413         gpu->identity.features = gpu_read(gpu, VIVS_HI_CHIP_FEATURE);
 414
 415         /* Disable fast clear on GC700. */
 416         if (gpu->identity.model == chipModel_GC700)
 417                 gpu->identity.features &= ~chipFeatures_FAST_CLEAR;
 418
 419         if ((gpu->identity.model == chipModel_GC500 &&
 420              gpu->identity.revision < 2) ||
 421             (gpu->identity.model == chipModel_GC300 &&
 422              gpu->identity.revision < 0x2000)) {
 423
 424                 /*
 425                  * GC500 rev 1.x and GC300 rev < 2.0 doesn't have these
 426                  * registers.
 427                  */
 428                 gpu->identity.minor_features0 = 0;
 429                 gpu->identity.minor_features1 = 0;
 430                 gpu->identity.minor_features2 = 0;
 431                 gpu->identity.minor_features3 = 0;
 432                 gpu->identity.minor_features4 = 0;
 433                 gpu->identity.minor_features5 = 0;
 434         } else
 435                 gpu->identity.minor_features0 =
 436                                 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_0);
 437
 438         if (gpu->identity.minor_features0 &
 439             chipMinorFeatures0_MORE_MINOR_FEATURES) {
 440                 gpu->identity.minor_features1 =
 441                                 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_1);
 442                 gpu->identity.minor_features2 =
 443                                 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_2);
 444                 gpu->identity.minor_features3 =
 445                                 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_3);
 446                 gpu->identity.minor_features4 =
 447                                 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_4);
 448                 gpu->identity.minor_features5 =
 449                                 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_5);
 450         }
 451
 452         /* GC600 idle register reports zero bits where modules aren't present */
 453         if (gpu->identity.model == chipModel_GC600)
 454                 gpu->idle_mask = VIVS_HI_IDLE_STATE_TX |
 455                                  VIVS_HI_IDLE_STATE_RA |
 456                                  VIVS_HI_IDLE_STATE_SE |
 457                                  VIVS_HI_IDLE_STATE_PA |
 458                                  VIVS_HI_IDLE_STATE_SH |
 459                                  VIVS_HI_IDLE_STATE_PE |
 460                                  VIVS_HI_IDLE_STATE_DE |
 461                                  VIVS_HI_IDLE_STATE_FE;
 462
 463         etnaviv_hw_specs(gpu);
 464 }
 465
 466 static void etnaviv_gpu_load_clock(struct etnaviv_gpu *gpu, u32 clock)
 467 {
 468         gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock |
 469                   VIVS_HI_CLOCK_CONTROL_FSCALE_CMD_LOAD);
 470         gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock);
 471 }
 472
 473 static void etnaviv_gpu_update_clock(struct etnaviv_gpu *gpu)
 474 {
 475         if (gpu->identity.minor_features2 &
 476             chipMinorFeatures2_DYNAMIC_FREQUENCY_SCALING) {
 477                 clk_set_rate(gpu->clk_core,
 478                              gpu->base_rate_core >> gpu->freq_scale);
 479                 clk_set_rate(gpu->clk_shader,
 480                              gpu->base_rate_shader >> gpu->freq_scale);
 481         } else {
 482                 unsigned int fscale = 1 << (6 - gpu->freq_scale);
 483                 u32 clock = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL);
 484
 485                 clock &= ~VIVS_HI_CLOCK_CONTROL_FSCALE_VAL__MASK;
 486                 clock |= VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(fscale);
 487                 etnaviv_gpu_load_clock(gpu, clock);
 488         }
 489 }
 490
 491 static int etnaviv_hw_reset(struct etnaviv_gpu *gpu)
 492 {
 493         u32 control, idle;
 494         unsigned long timeout;
 495         bool failed = true;
 496
 497         /* We hope that the GPU resets in under one second */
 498         timeout = jiffies + msecs_to_jiffies(1000);
 499
 500         while (time_is_after_jiffies(timeout)) {
 501                 /* enable clock */
 502                 unsigned int fscale = 1 << (6 - gpu->freq_scale);
 503                 control = VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(fscale);
 504                 etnaviv_gpu_load_clock(gpu, control);
 505
 506                 /* isolate the GPU. */
 507                 control |= VIVS_HI_CLOCK_CONTROL_ISOLATE_GPU;
 508                 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control);
 509
 510                 if (gpu->sec_mode == ETNA_SEC_KERNEL) {
 511                         gpu_write(gpu, VIVS_MMUv2_AHB_CONTROL,
 512                                   VIVS_MMUv2_AHB_CONTROL_RESET);
 513                 } else {
 514                         /* set soft reset. */
 515                         control |= VIVS_HI_CLOCK_CONTROL_SOFT_RESET;
 516                         gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control);
 517                 }
 518
 519                 /* wait for reset. */
 520                 usleep_range(10, 20);
 521
 522                 /* reset soft reset bit. */
 523                 control &= ~VIVS_HI_CLOCK_CONTROL_SOFT_RESET;
 524                 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control);
 525
 526                 /* reset GPU isolation. */
 527                 control &= ~VIVS_HI_CLOCK_CONTROL_ISOLATE_GPU;
 528                 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control);
 529
 530                 /* read idle register. */
 531                 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE);
 532
 533                 /* try resetting again if FE is not idle */
 534                 if ((idle & VIVS_HI_IDLE_STATE_FE) == 0) {
 535                         dev_dbg(gpu->dev, "FE is not idle\n");
 536                         continue;
 537                 }
 538
 539                 /* read reset register. */
 540                 control = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL);
 541
 542                 /* is the GPU idle? */
 543                 if (((control & VIVS_HI_CLOCK_CONTROL_IDLE_3D) == 0) ||
 544                     ((control & VIVS_HI_CLOCK_CONTROL_IDLE_2D) == 0)) {
 545                         dev_dbg(gpu->dev, "GPU is not idle\n");
 546                         continue;
 547                 }
 548
 549                 /* disable debug registers, as they are not normally needed */
 550                 control |= VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS;
 551                 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control);
 552
 553                 failed = false;
 554                 break;
 555         }
 556
 557         if (failed) {
 558                 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE);
 559                 control = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL);
 560
 561                 dev_err(gpu->dev, "GPU failed to reset: FE %sidle, 3D %sidle, 2D %sidle\n",
 562                         idle & VIVS_HI_IDLE_STATE_FE ? "" : "not ",
 563                         control & VIVS_HI_CLOCK_CONTROL_IDLE_3D ? "" : "not ",
 564                         control & VIVS_HI_CLOCK_CONTROL_IDLE_2D ? "" : "not ");
 565
 566                 return -EBUSY;
 567         }
 568
 569         /* We rely on the GPU running, so program the clock */
 570         etnaviv_gpu_update_clock(gpu);
 571
 572         return 0;
 573 }
 574
 575 static void etnaviv_gpu_enable_mlcg(struct etnaviv_gpu *gpu)
 576 {
 577         u32 pmc, ppc;
 578
 579         /* enable clock gating */
 580         ppc = gpu_read(gpu, VIVS_PM_POWER_CONTROLS);
 581         ppc |= VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING;
 582
 583         /* Disable stall module clock gating for 4.3.0.1 and 4.3.0.2 revs */
 584         if (gpu->identity.revision == 0x4301 ||
 585             gpu->identity.revision == 0x4302)
 586                 ppc |= VIVS_PM_POWER_CONTROLS_DISABLE_STALL_MODULE_CLOCK_GATING;
 587
 588         gpu_write(gpu, VIVS_PM_POWER_CONTROLS, ppc);
 589
 590         pmc = gpu_read(gpu, VIVS_PM_MODULE_CONTROLS);
 591
 592         /* Disable PA clock gating for GC400+ without bugfix except for GC420 */
 593         if (gpu->identity.model >= chipModel_GC400 &&
 594             gpu->identity.model != chipModel_GC420 &&
 595             !(gpu->identity.minor_features3 & chipMinorFeatures3_BUG_FIXES12))
 596                 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PA;
 597
 598         /*
 599          * Disable PE clock gating on revs < 5.0.0.0 when HZ is
 600          * present without a bug fix.
 601          */
 602         if (gpu->identity.revision < 0x5000 &&
 603             gpu->identity.minor_features0 & chipMinorFeatures0_HZ &&
 604             !(gpu->identity.minor_features1 &
 605               chipMinorFeatures1_DISABLE_PE_GATING))
 606                 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PE;
 607
 608         if (gpu->identity.revision < 0x5422)
 609                 pmc |= BIT(15); /* Unknown bit */
 610
 611         /* Disable TX clock gating on affected core revisions. */
 612         if (etnaviv_is_model_rev(gpu, GC4000, 0x5222) ||
 613             etnaviv_is_model_rev(gpu, GC2000, 0x5108))
 614                 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_TX;
 615
 616         pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_HZ;
 617         pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_EZ;
 618
 619         gpu_write(gpu, VIVS_PM_MODULE_CONTROLS, pmc);
 620 }
 621
 622 void etnaviv_gpu_start_fe(struct etnaviv_gpu *gpu, u32 address, u16 prefetch)
 623 {
 624         gpu_write(gpu, VIVS_FE_COMMAND_ADDRESS, address);
 625         gpu_write(gpu, VIVS_FE_COMMAND_CONTROL,
 626                   VIVS_FE_COMMAND_CONTROL_ENABLE |
 627                   VIVS_FE_COMMAND_CONTROL_PREFETCH(prefetch));
 628
 629         if (gpu->sec_mode == ETNA_SEC_KERNEL) {
 630                 gpu_write(gpu, VIVS_MMUv2_SEC_COMMAND_CONTROL,
 631                           VIVS_MMUv2_SEC_COMMAND_CONTROL_ENABLE |
 632                           VIVS_MMUv2_SEC_COMMAND_CONTROL_PREFETCH(prefetch));
 633         }
 634 }
 635
 636 static void etnaviv_gpu_start_fe_idleloop(struct etnaviv_gpu *gpu)
 637 {
 638         u32 address = etnaviv_cmdbuf_get_va(&gpu->buffer,
 639                                 &gpu->mmu_context->cmdbuf_mapping);
 640         u16 prefetch;
 641
 642         /* setup the MMU */
 643         etnaviv_iommu_restore(gpu, gpu->mmu_context);
 644
 645         /* Start command processor */
 646         prefetch = etnaviv_buffer_init(gpu);
 647
 648         etnaviv_gpu_start_fe(gpu, address, prefetch);
 649 }
 650
 651 static void etnaviv_gpu_setup_pulse_eater(struct etnaviv_gpu *gpu)
 652 {
 653         /*
 654          * Base value for VIVS_PM_PULSE_EATER register on models where it
 655          * cannot be read, extracted from vivante kernel driver.
 656          */
 657         u32 pulse_eater = 0x01590880;
 658
 659         if (etnaviv_is_model_rev(gpu, GC4000, 0x5208) ||
 660             etnaviv_is_model_rev(gpu, GC4000, 0x5222)) {
 661                 pulse_eater |= BIT(23);
 662
 663         }
 664
 665         if (etnaviv_is_model_rev(gpu, GC1000, 0x5039) ||
 666             etnaviv_is_model_rev(gpu, GC1000, 0x5040)) {
 667                 pulse_eater &= ~BIT(16);
 668                 pulse_eater |= BIT(17);
 669         }
 670
 671         if ((gpu->identity.revision > 0x5420) &&
 672             (gpu->identity.features & chipFeatures_PIPE_3D))
 673         {
 674                 /* Performance fix: disable internal DFS */
 675                 pulse_eater = gpu_read(gpu, VIVS_PM_PULSE_EATER);
 676                 pulse_eater |= BIT(18);
 677         }
 678
 679         gpu_write(gpu, VIVS_PM_PULSE_EATER, pulse_eater);
 680 }
 681
 682 static void etnaviv_gpu_hw_init(struct etnaviv_gpu *gpu)
 683 {
 684         if ((etnaviv_is_model_rev(gpu, GC320, 0x5007) ||
 685              etnaviv_is_model_rev(gpu, GC320, 0x5220)) &&
 686             gpu_read(gpu, VIVS_HI_CHIP_TIME) != 0x2062400) {
 687                 u32 mc_memory_debug;
 688
 689                 mc_memory_debug = gpu_read(gpu, VIVS_MC_DEBUG_MEMORY) & ~0xff;
 690
 691                 if (gpu->identity.revision == 0x5007)
 692                         mc_memory_debug |= 0x0c;
 693                 else
 694                         mc_memory_debug |= 0x08;
 695
 696                 gpu_write(gpu, VIVS_MC_DEBUG_MEMORY, mc_memory_debug);
 697         }
 698
 699         /* enable module-level clock gating */
 700         etnaviv_gpu_enable_mlcg(gpu);
 701
 702         /*
 703          * Update GPU AXI cache atttribute to "cacheable, no allocate".
 704          * This is necessary to prevent the iMX6 SoC locking up.
 705          */
 706         gpu_write(gpu, VIVS_HI_AXI_CONFIG,
 707                   VIVS_HI_AXI_CONFIG_AWCACHE(2) |
 708                   VIVS_HI_AXI_CONFIG_ARCACHE(2));
 709
 710         /* GC2000 rev 5108 needs a special bus config */
 711         if (etnaviv_is_model_rev(gpu, GC2000, 0x5108)) {
 712                 u32 bus_config = gpu_read(gpu, VIVS_MC_BUS_CONFIG);
 713                 bus_config &= ~(VIVS_MC_BUS_CONFIG_FE_BUS_CONFIG__MASK |
 714                                 VIVS_MC_BUS_CONFIG_TX_BUS_CONFIG__MASK);
 715                 bus_config |= VIVS_MC_BUS_CONFIG_FE_BUS_CONFIG(1) |
 716                               VIVS_MC_BUS_CONFIG_TX_BUS_CONFIG(0);
 717                 gpu_write(gpu, VIVS_MC_BUS_CONFIG, bus_config);
 718         }
 719
 720         if (gpu->sec_mode == ETNA_SEC_KERNEL) {
 721                 u32 val = gpu_read(gpu, VIVS_MMUv2_AHB_CONTROL);
 722                 val |= VIVS_MMUv2_AHB_CONTROL_NONSEC_ACCESS;
 723                 gpu_write(gpu, VIVS_MMUv2_AHB_CONTROL, val);
 724         }
 725
 726         /* setup the pulse eater */
 727         etnaviv_gpu_setup_pulse_eater(gpu);
 728
 729         gpu_write(gpu, VIVS_HI_INTR_ENBL, ~0U);
 730 }
 731
 732 int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
 733 {
 734         struct etnaviv_drm_private *priv = gpu->drm->dev_private;
 735         dma_addr_t cmdbuf_paddr;
 736         int ret, i;
 737
 738         ret = pm_runtime_get_sync(gpu->dev);
 739         if (ret < 0) {
 740                 dev_err(gpu->dev, "Failed to enable GPU power domain\n");
 741                 goto pm_put;
 742         }
 743
 744         etnaviv_hw_identify(gpu);
 745
 746         if (gpu->identity.model == 0) {
 747                 dev_err(gpu->dev, "Unknown GPU model\n");
 748                 ret = -ENXIO;
 749                 goto fail;
 750         }
 751
 752         /* Exclude VG cores with FE2.0 */
 753         if (gpu->identity.features & chipFeatures_PIPE_VG &&
 754             gpu->identity.features & chipFeatures_FE20) {
 755                 dev_info(gpu->dev, "Ignoring GPU with VG and FE2.0\n");
 756                 ret = -ENXIO;
 757                 goto fail;
 758         }
 759
 760         /*
 761          * On cores with security features supported, we claim control over the
 762          * security states.
 763          */
 764         if ((gpu->identity.minor_features7 & chipMinorFeatures7_BIT_SECURITY) &&
 765             (gpu->identity.minor_features10 & chipMinorFeatures10_SECURITY_AHB))
 766                 gpu->sec_mode = ETNA_SEC_KERNEL;
 767
 768         ret = etnaviv_hw_reset(gpu);
 769         if (ret) {
 770                 dev_err(gpu->dev, "GPU reset failed\n");
 771                 goto fail;
 772         }
 773
 774         ret = etnaviv_iommu_global_init(gpu);
 775         if (ret)
 776                 goto fail;
 777
 778         /*
 779          * If the GPU is part of a system with DMA addressing limitations,
 780          * request pages for our SHM backend buffers from the DMA32 zone to
 781          * hopefully avoid performance killing SWIOTLB bounce buffering.
 782          */
 783         if (dma_addressing_limited(gpu->dev))
 784                 priv->shm_gfp_mask |= GFP_DMA32;
 785
 786         /* Create buffer: */
 787         ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &gpu->buffer,
 788                                   PAGE_SIZE);
 789         if (ret) {
 790                 dev_err(gpu->dev, "could not create command buffer\n");
 791                 goto fail;
 792         }
 793
 794         /*
 795          * Set the GPU linear window to cover the cmdbuf region, as the GPU
 796          * won't be able to start execution otherwise. The alignment to 128M is
 797          * chosen arbitrarily but helps in debugging, as the MMU offset
 798          * calculations are much more straight forward this way.
 799          *
 800          * On MC1.0 cores the linear window offset is ignored by the TS engine,
 801          * leading to inconsistent memory views. Avoid using the offset on those
 802          * cores if possible, otherwise disable the TS feature.
 803          */
 804         cmdbuf_paddr = ALIGN_DOWN(etnaviv_cmdbuf_get_pa(&gpu->buffer), SZ_128M);
 805
 806         if (!(gpu->identity.features & chipFeatures_PIPE_3D) ||
 807             (gpu->identity.minor_features0 & chipMinorFeatures0_MC20)) {
 808                 if (cmdbuf_paddr >= SZ_2G)
 809                         priv->mmu_global->memory_base = SZ_2G;
 810                 else
 811                         priv->mmu_global->memory_base = cmdbuf_paddr;
 812         } else if (cmdbuf_paddr + SZ_128M >= SZ_2G) {
 813                 dev_info(gpu->dev,
 814                          "Need to move linear window on MC1.0, disabling TS\n");
 815                 gpu->identity.features &= ~chipFeatures_FAST_CLEAR;
 816                 priv->mmu_global->memory_base = SZ_2G;
 817         }
 818
 819         /* Setup event management */
 820         spin_lock_init(&gpu->event_spinlock);
 821         init_completion(&gpu->event_free);
 822         bitmap_zero(gpu->event_bitmap, ETNA_NR_EVENTS);
 823         for (i = 0; i < ARRAY_SIZE(gpu->event); i++)
 824                 complete(&gpu->event_free);
 825
 826         /* Now program the hardware */
 827         mutex_lock(&gpu->lock);
 828         etnaviv_gpu_hw_init(gpu);
 829         gpu->exec_state = -1;
 830         mutex_unlock(&gpu->lock);
 831
 832         pm_runtime_mark_last_busy(gpu->dev);
 833         pm_runtime_put_autosuspend(gpu->dev);
 834
 835         gpu->initialized = true;
 836
 837         return 0;
 838
 839 fail:
 840         pm_runtime_mark_last_busy(gpu->dev);
 841 pm_put:
 842         pm_runtime_put_autosuspend(gpu->dev);
 843
 844         return ret;
 845 }
 846
 847 #ifdef CONFIG_DEBUG_FS
 848 struct dma_debug {
 849         u32 address[2];
 850         u32 state[2];
 851 };
 852
 853 static void verify_dma(struct etnaviv_gpu *gpu, struct dma_debug *debug)
 854 {
 855         u32 i;
 856
 857         debug->address[0] = gpu_read(gpu, VIVS_FE_DMA_ADDRESS);
 858         debug->state[0]   = gpu_read(gpu, VIVS_FE_DMA_DEBUG_STATE);
 859
 860         for (i = 0; i < 500; i++) {
 861                 debug->address[1] = gpu_read(gpu, VIVS_FE_DMA_ADDRESS);
 862                 debug->state[1]   = gpu_read(gpu, VIVS_FE_DMA_DEBUG_STATE);
 863
 864                 if (debug->address[0] != debug->address[1])
 865                         break;
 866
 867                 if (debug->state[0] != debug->state[1])
 868                         break;
 869         }
 870 }
 871
 872 int etnaviv_gpu_debugfs(struct etnaviv_gpu *gpu, struct seq_file *m)
 873 {
 874         struct dma_debug debug;
 875         u32 dma_lo, dma_hi, axi, idle;
 876         int ret;
 877
 878         seq_printf(m, "%s Status:\n", dev_name(gpu->dev));
 879
 880         ret = pm_runtime_get_sync(gpu->dev);
 881         if (ret < 0)
 882                 goto pm_put;
 883
 884         dma_lo = gpu_read(gpu, VIVS_FE_DMA_LOW);
 885         dma_hi = gpu_read(gpu, VIVS_FE_DMA_HIGH);
 886         axi = gpu_read(gpu, VIVS_HI_AXI_STATUS);
 887         idle = gpu_read(gpu, VIVS_HI_IDLE_STATE);
 888
 889         verify_dma(gpu, &debug);
 890
 891         seq_puts(m, "\tidentity\n");
 892         seq_printf(m, "\t model: 0x%x\n", gpu->identity.model);
 893         seq_printf(m, "\t revision: 0x%x\n", gpu->identity.revision);
 894         seq_printf(m, "\t product_id: 0x%x\n", gpu->identity.product_id);
 895         seq_printf(m, "\t customer_id: 0x%x\n", gpu->identity.customer_id);
 896         seq_printf(m, "\t eco_id: 0x%x\n", gpu->identity.eco_id);
 897
 898         seq_puts(m, "\tfeatures\n");
 899         seq_printf(m, "\t major_features: 0x%08x\n",
 900                    gpu->identity.features);
 901         seq_printf(m, "\t minor_features0: 0x%08x\n",
 902                    gpu->identity.minor_features0);
 903         seq_printf(m, "\t minor_features1: 0x%08x\n",
 904                    gpu->identity.minor_features1);
 905         seq_printf(m, "\t minor_features2: 0x%08x\n",
 906                    gpu->identity.minor_features2);
 907         seq_printf(m, "\t minor_features3: 0x%08x\n",
 908                    gpu->identity.minor_features3);
 909         seq_printf(m, "\t minor_features4: 0x%08x\n",
 910                    gpu->identity.minor_features4);
 911         seq_printf(m, "\t minor_features5: 0x%08x\n",
 912                    gpu->identity.minor_features5);
 913         seq_printf(m, "\t minor_features6: 0x%08x\n",
 914                    gpu->identity.minor_features6);
 915         seq_printf(m, "\t minor_features7: 0x%08x\n",
 916                    gpu->identity.minor_features7);
 917         seq_printf(m, "\t minor_features8: 0x%08x\n",
 918                    gpu->identity.minor_features8);
 919         seq_printf(m, "\t minor_features9: 0x%08x\n",
 920                    gpu->identity.minor_features9);
 921         seq_printf(m, "\t minor_features10: 0x%08x\n",
 922                    gpu->identity.minor_features10);
 923         seq_printf(m, "\t minor_features11: 0x%08x\n",
 924                    gpu->identity.minor_features11);
 925
 926         seq_puts(m, "\tspecs\n");
 927         seq_printf(m, "\t stream_count:  %d\n",
 928                         gpu->identity.stream_count);
 929         seq_printf(m, "\t register_max: %d\n",
 930                         gpu->identity.register_max);
 931         seq_printf(m, "\t thread_count: %d\n",
 932                         gpu->identity.thread_count);
 933         seq_printf(m, "\t vertex_cache_size: %d\n",
 934                         gpu->identity.vertex_cache_size);
 935         seq_printf(m, "\t shader_core_count: %d\n",
 936                         gpu->identity.shader_core_count);
 937         seq_printf(m, "\t pixel_pipes: %d\n",
 938                         gpu->identity.pixel_pipes);
 939         seq_printf(m, "\t vertex_output_buffer_size: %d\n",
 940                         gpu->identity.vertex_output_buffer_size);
 941         seq_printf(m, "\t buffer_size: %d\n",
 942                         gpu->identity.buffer_size);
 943         seq_printf(m, "\t instruction_count: %d\n",
 944                         gpu->identity.instruction_count);
 945         seq_printf(m, "\t num_constants: %d\n",
 946                         gpu->identity.num_constants);
 947         seq_printf(m, "\t varyings_count: %d\n",
 948                         gpu->identity.varyings_count);
 949
 950         seq_printf(m, "\taxi: 0x%08x\n", axi);
 951         seq_printf(m, "\tidle: 0x%08x\n", idle);
 952         idle |= ~gpu->idle_mask & ~VIVS_HI_IDLE_STATE_AXI_LP;
 953         if ((idle & VIVS_HI_IDLE_STATE_FE) == 0)
 954                 seq_puts(m, "\t FE is not idle\n");
 955         if ((idle & VIVS_HI_IDLE_STATE_DE) == 0)
 956                 seq_puts(m, "\t DE is not idle\n");
 957         if ((idle & VIVS_HI_IDLE_STATE_PE) == 0)
 958                 seq_puts(m, "\t PE is not idle\n");
 959         if ((idle & VIVS_HI_IDLE_STATE_SH) == 0)
 960                 seq_puts(m, "\t SH is not idle\n");
 961         if ((idle & VIVS_HI_IDLE_STATE_PA) == 0)
 962                 seq_puts(m, "\t PA is not idle\n");
 963         if ((idle & VIVS_HI_IDLE_STATE_SE) == 0)
 964                 seq_puts(m, "\t SE is not idle\n");
 965         if ((idle & VIVS_HI_IDLE_STATE_RA) == 0)
 966                 seq_puts(m, "\t RA is not idle\n");
 967         if ((idle & VIVS_HI_IDLE_STATE_TX) == 0)
 968                 seq_puts(m, "\t TX is not idle\n");
 969         if ((idle & VIVS_HI_IDLE_STATE_VG) == 0)
 970                 seq_puts(m, "\t VG is not idle\n");
 971         if ((idle & VIVS_HI_IDLE_STATE_IM) == 0)
 972                 seq_puts(m, "\t IM is not idle\n");
 973         if ((idle & VIVS_HI_IDLE_STATE_FP) == 0)
 974                 seq_puts(m, "\t FP is not idle\n");
 975         if ((idle & VIVS_HI_IDLE_STATE_TS) == 0)
 976                 seq_puts(m, "\t TS is not idle\n");
 977         if ((idle & VIVS_HI_IDLE_STATE_BL) == 0)
 978                 seq_puts(m, "\t BL is not idle\n");
 979         if ((idle & VIVS_HI_IDLE_STATE_ASYNCFE) == 0)
 980                 seq_puts(m, "\t ASYNCFE is not idle\n");
 981         if ((idle & VIVS_HI_IDLE_STATE_MC) == 0)
 982                 seq_puts(m, "\t MC is not idle\n");
 983         if ((idle & VIVS_HI_IDLE_STATE_PPA) == 0)
 984                 seq_puts(m, "\t PPA is not idle\n");
 985         if ((idle & VIVS_HI_IDLE_STATE_WD) == 0)
 986                 seq_puts(m, "\t WD is not idle\n");
 987         if ((idle & VIVS_HI_IDLE_STATE_NN) == 0)
 988                 seq_puts(m, "\t NN is not idle\n");
 989         if ((idle & VIVS_HI_IDLE_STATE_TP) == 0)
 990                 seq_puts(m, "\t TP is not idle\n");
 991         if (idle & VIVS_HI_IDLE_STATE_AXI_LP)
 992                 seq_puts(m, "\t AXI low power mode\n");
 993
 994         if (gpu->identity.features & chipFeatures_DEBUG_MODE) {
 995                 u32 read0 = gpu_read(gpu, VIVS_MC_DEBUG_READ0);
 996                 u32 read1 = gpu_read(gpu, VIVS_MC_DEBUG_READ1);
 997                 u32 write = gpu_read(gpu, VIVS_MC_DEBUG_WRITE);
 998
 999                 seq_puts(m, "\tMC\n");
1000                 seq_printf(m, "\t read0: 0x%08x\n", read0);
1001                 seq_printf(m, "\t read1: 0x%08x\n", read1);
1002                 seq_printf(m, "\t write: 0x%08x\n", write);
1003         }
1004
1005         seq_puts(m, "\tDMA ");
1006
1007         if (debug.address[0] == debug.address[1] &&
1008             debug.state[0] == debug.state[1]) {
1009                 seq_puts(m, "seems to be stuck\n");
1010         } else if (debug.address[0] == debug.address[1]) {
1011                 seq_puts(m, "address is constant\n");
1012         } else {
1013                 seq_puts(m, "is running\n");
1014         }
1015
1016         seq_printf(m, "\t address 0: 0x%08x\n", debug.address[0]);
1017         seq_printf(m, "\t address 1: 0x%08x\n", debug.address[1]);
1018         seq_printf(m, "\t state 0: 0x%08x\n", debug.state[0]);
1019         seq_printf(m, "\t state 1: 0x%08x\n", debug.state[1]);
1020         seq_printf(m, "\t last fetch 64 bit word: 0x%08x 0x%08x\n",
1021                    dma_lo, dma_hi);
1022
1023         ret = 0;
1024
1025         pm_runtime_mark_last_busy(gpu->dev);
1026 pm_put:
1027         pm_runtime_put_autosuspend(gpu->dev);
1028
1029         return ret;
1030 }
1031 #endif
1032
1033 void etnaviv_gpu_recover_hang(struct etnaviv_gpu *gpu)
1034 {
1035         unsigned int i = 0;
1036
1037         dev_err(gpu->dev, "recover hung GPU!\n");
1038
1039         if (pm_runtime_get_sync(gpu->dev) < 0)
1040                 goto pm_put;
1041
1042         mutex_lock(&gpu->lock);
1043
1044         etnaviv_hw_reset(gpu);
1045
1046         /* complete all events, the GPU won't do it after the reset */
1047         spin_lock(&gpu->event_spinlock);
1048         for_each_set_bit_from(i, gpu->event_bitmap, ETNA_NR_EVENTS)
1049                 complete(&gpu->event_free);
1050         bitmap_zero(gpu->event_bitmap, ETNA_NR_EVENTS);
1051         spin_unlock(&gpu->event_spinlock);
1052
1053         etnaviv_gpu_hw_init(gpu);
1054         gpu->exec_state = -1;
1055         gpu->mmu_context = NULL;
1056
1057         mutex_unlock(&gpu->lock);
1058         pm_runtime_mark_last_busy(gpu->dev);
1059 pm_put:
1060         pm_runtime_put_autosuspend(gpu->dev);
1061 }
1062
1063 /* fence object management */
1064 struct etnaviv_fence {
1065         struct etnaviv_gpu *gpu;
1066         struct dma_fence base;
1067 };
1068
1069 static inline struct etnaviv_fence *to_etnaviv_fence(struct dma_fence *fence)
1070 {
1071         return container_of(fence, struct etnaviv_fence, base);
1072 }
1073
1074 static const char *etnaviv_fence_get_driver_name(struct dma_fence *fence)
1075 {
1076         return "etnaviv";
1077 }
1078
1079 static const char *etnaviv_fence_get_timeline_name(struct dma_fence *fence)
1080 {
1081         struct etnaviv_fence *f = to_etnaviv_fence(fence);
1082
1083         return dev_name(f->gpu->dev);
1084 }
1085
1086 static bool etnaviv_fence_signaled(struct dma_fence *fence)
1087 {
1088         struct etnaviv_fence *f = to_etnaviv_fence(fence);
1089
1090         return (s32)(f->gpu->completed_fence - f->base.seqno) >= 0;
1091 }
1092
1093 static void etnaviv_fence_release(struct dma_fence *fence)
1094 {
1095         struct etnaviv_fence *f = to_etnaviv_fence(fence);
1096
1097         kfree_rcu(f, base.rcu);
1098 }
1099
1100 static const struct dma_fence_ops etnaviv_fence_ops = {
1101         .get_driver_name = etnaviv_fence_get_driver_name,
1102         .get_timeline_name = etnaviv_fence_get_timeline_name,
1103         .signaled = etnaviv_fence_signaled,
1104         .release = etnaviv_fence_release,
1105 };
1106
1107 static struct dma_fence *etnaviv_gpu_fence_alloc(struct etnaviv_gpu *gpu)
1108 {
1109         struct etnaviv_fence *f;
1110
1111         /*
1112          * GPU lock must already be held, otherwise fence completion order might
1113          * not match the seqno order assigned here.
1114          */
1115         lockdep_assert_held(&gpu->lock);
1116
1117         f = kzalloc(sizeof(*f), GFP_KERNEL);
1118         if (!f)
1119                 return NULL;
1120
1121         f->gpu = gpu;
1122
1123         dma_fence_init(&f->base, &etnaviv_fence_ops, &gpu->fence_spinlock,
1124                        gpu->fence_context, ++gpu->next_fence);
1125
1126         return &f->base;
1127 }
1128
1129 /* returns true if fence a comes after fence b */
1130 static inline bool fence_after(u32 a, u32 b)
1131 {
1132         return (s32)(a - b) > 0;
1133 }
1134
1135 /*
1136  * event management:
1137  */
1138
1139 static int event_alloc(struct etnaviv_gpu *gpu, unsigned nr_events,
1140         unsigned int *events)
1141 {
1142         unsigned long timeout = msecs_to_jiffies(10 * 10000);
1143         unsigned i, acquired = 0;
1144
1145         for (i = 0; i < nr_events; i++) {
1146                 unsigned long ret;
1147
1148                 ret = wait_for_completion_timeout(&gpu->event_free, timeout);
1149
1150                 if (!ret) {
1151                         dev_err(gpu->dev, "wait_for_completion_timeout failed");
1152                         goto out;
1153                 }
1154
1155                 acquired++;
1156                 timeout = ret;
1157         }
1158
1159         spin_lock(&gpu->event_spinlock);
1160
1161         for (i = 0; i < nr_events; i++) {
1162                 int event = find_first_zero_bit(gpu->event_bitmap, ETNA_NR_EVENTS);
1163
1164                 events[i] = event;
1165                 memset(&gpu->event[event], 0, sizeof(struct etnaviv_event));
1166                 set_bit(event, gpu->event_bitmap);
1167         }
1168
1169         spin_unlock(&gpu->event_spinlock);
1170
1171         return 0;
1172
1173 out:
1174         for (i = 0; i < acquired; i++)
1175                 complete(&gpu->event_free);
1176
1177         return -EBUSY;
1178 }
1179
1180 static void event_free(struct etnaviv_gpu *gpu, unsigned int event)
1181 {
1182         if (!test_bit(event, gpu->event_bitmap)) {
1183                 dev_warn(gpu->dev, "event %u is already marked as free",
1184                          event);
1185         } else {
1186                 clear_bit(event, gpu->event_bitmap);
1187                 complete(&gpu->event_free);
1188         }
1189 }
1190
1191 /*
1192  * Cmdstream submission/retirement:
1193  */
1194 int etnaviv_gpu_wait_fence_interruptible(struct etnaviv_gpu *gpu,
1195         u32 id, struct drm_etnaviv_timespec *timeout)
1196 {
1197         struct dma_fence *fence;
1198         int ret;
1199
1200         /*
1201          * Look up the fence and take a reference. We might still find a fence
1202          * whose refcount has already dropped to zero. dma_fence_get_rcu
1203          * pretends we didn't find a fence in that case.
1204          */
1205         rcu_read_lock();
1206         fence = idr_find(&gpu->fence_idr, id);
1207         if (fence)
1208                 fence = dma_fence_get_rcu(fence);
1209         rcu_read_unlock();
1210
1211         if (!fence)
1212                 return 0;
1213
1214         if (!timeout) {
1215                 /* No timeout was requested: just test for completion */
1216                 ret = dma_fence_is_signaled(fence) ? 0 : -EBUSY;
1217         } else {
1218                 unsigned long remaining = etnaviv_timeout_to_jiffies(timeout);
1219
1220                 ret = dma_fence_wait_timeout(fence, true, remaining);
1221                 if (ret == 0)
1222                         ret = -ETIMEDOUT;
1223                 else if (ret != -ERESTARTSYS)
1224                         ret = 0;
1225
1226         }
1227
1228         dma_fence_put(fence);
1229         return ret;
1230 }
1231
1232 /*
1233  * Wait for an object to become inactive.  This, on it's own, is not race
1234  * free: the object is moved by the scheduler off the active list, and
1235  * then the iova is put.  Moreover, the object could be re-submitted just
1236  * after we notice that it's become inactive.
1237  *
1238  * Although the retirement happens under the gpu lock, we don't want to hold
1239  * that lock in this function while waiting.
1240  */
1241 int etnaviv_gpu_wait_obj_inactive(struct etnaviv_gpu *gpu,
1242         struct etnaviv_gem_object *etnaviv_obj,
1243         struct drm_etnaviv_timespec *timeout)
1244 {
1245         unsigned long remaining;
1246         long ret;
1247
1248         if (!timeout)
1249                 return !is_active(etnaviv_obj) ? 0 : -EBUSY;
1250
1251         remaining = etnaviv_timeout_to_jiffies(timeout);
1252
1253         ret = wait_event_interruptible_timeout(gpu->fence_event,
1254                                                !is_active(etnaviv_obj),
1255                                                remaining);
1256         if (ret > 0)
1257                 return 0;
1258         else if (ret == -ERESTARTSYS)
1259                 return -ERESTARTSYS;
1260         else
1261                 return -ETIMEDOUT;
1262 }
1263
1264 static void sync_point_perfmon_sample(struct etnaviv_gpu *gpu,
1265         struct etnaviv_event *event, unsigned int flags)
1266 {
1267         const struct etnaviv_gem_submit *submit = event->submit;
1268         unsigned int i;
1269
1270         for (i = 0; i < submit->nr_pmrs; i++) {
1271                 const struct etnaviv_perfmon_request *pmr = submit->pmrs + i;
1272
1273                 if (pmr->flags == flags)
1274                         etnaviv_perfmon_process(gpu, pmr, submit->exec_state);
1275         }
1276 }
1277
1278 static void sync_point_perfmon_sample_pre(struct etnaviv_gpu *gpu,
1279         struct etnaviv_event *event)
1280 {
1281         u32 val;
1282
1283         /* disable clock gating */
1284         val = gpu_read(gpu, VIVS_PM_POWER_CONTROLS);
1285         val &= ~VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING;
1286         gpu_write(gpu, VIVS_PM_POWER_CONTROLS, val);
1287
1288         /* enable debug register */
1289         val = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL);
1290         val &= ~VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS;
1291         gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, val);
1292
1293         sync_point_perfmon_sample(gpu, event, ETNA_PM_PROCESS_PRE);
1294 }
1295
1296 static void sync_point_perfmon_sample_post(struct etnaviv_gpu *gpu,
1297         struct etnaviv_event *event)
1298 {
1299         const struct etnaviv_gem_submit *submit = event->submit;
1300         unsigned int i;
1301         u32 val;
1302
1303         sync_point_perfmon_sample(gpu, event, ETNA_PM_PROCESS_POST);
1304
1305         for (i = 0; i < submit->nr_pmrs; i++) {
1306                 const struct etnaviv_perfmon_request *pmr = submit->pmrs + i;
1307
1308                 *pmr->bo_vma = pmr->sequence;
1309         }
1310
1311         /* disable debug register */
1312         val = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL);
1313         val |= VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS;
1314         gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, val);
1315
1316         /* enable clock gating */
1317         val = gpu_read(gpu, VIVS_PM_POWER_CONTROLS);
1318         val |= VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING;
1319         gpu_write(gpu, VIVS_PM_POWER_CONTROLS, val);
1320 }
1321
1322
1323 /* add bo's to gpu's ring, and kick gpu: */
1324 struct dma_fence *etnaviv_gpu_submit(struct etnaviv_gem_submit *submit)
1325 {
1326         struct etnaviv_gpu *gpu = submit->gpu;
1327         struct dma_fence *gpu_fence;
1328         unsigned int i, nr_events = 1, event[3];
1329         int ret;
1330
1331         if (!submit->runtime_resumed) {
1332                 ret = pm_runtime_get_sync(gpu->dev);
1333                 if (ret < 0) {
1334                         pm_runtime_put_noidle(gpu->dev);
1335                         return NULL;
1336                 }
1337                 submit->runtime_resumed = true;
1338         }
1339
1340         /*
1341          * if there are performance monitor requests we need to have
1342          * - a sync point to re-configure gpu and process ETNA_PM_PROCESS_PRE
1343          *   requests.
1344          * - a sync point to re-configure gpu, process ETNA_PM_PROCESS_POST requests
1345          *   and update the sequence number for userspace.
1346          */
1347         if (submit->nr_pmrs)
1348                 nr_events = 3;
1349
1350         ret = event_alloc(gpu, nr_events, event);
1351         if (ret) {
1352                 DRM_ERROR("no free events\n");
1353                 pm_runtime_put_noidle(gpu->dev);
1354                 return NULL;
1355         }
1356
1357         mutex_lock(&gpu->lock);
1358
1359         gpu_fence = etnaviv_gpu_fence_alloc(gpu);
1360         if (!gpu_fence) {
1361                 for (i = 0; i < nr_events; i++)
1362                         event_free(gpu, event[i]);
1363
1364                 goto out_unlock;
1365         }
1366
1367         if (!gpu->mmu_context) {
1368                 etnaviv_iommu_context_get(submit->mmu_context);
1369                 gpu->mmu_context = submit->mmu_context;
1370                 etnaviv_gpu_start_fe_idleloop(gpu);
1371         } else {
1372                 etnaviv_iommu_context_get(gpu->mmu_context);
1373                 submit->prev_mmu_context = gpu->mmu_context;
1374         }
1375
1376         if (submit->nr_pmrs) {
1377                 gpu->event[event[1]].sync_point = &sync_point_perfmon_sample_pre;
1378                 kref_get(&submit->refcount);
1379                 gpu->event[event[1]].submit = submit;
1380                 etnaviv_sync_point_queue(gpu, event[1]);
1381         }
1382
1383         gpu->event[event[0]].fence = gpu_fence;
1384         submit->cmdbuf.user_size = submit->cmdbuf.size - 8;
1385         etnaviv_buffer_queue(gpu, submit->exec_state, submit->mmu_context,
1386                              event[0], &submit->cmdbuf);
1387
1388         if (submit->nr_pmrs) {
1389                 gpu->event[event[2]].sync_point = &sync_point_perfmon_sample_post;
1390                 kref_get(&submit->refcount);
1391                 gpu->event[event[2]].submit = submit;
1392                 etnaviv_sync_point_queue(gpu, event[2]);
1393         }
1394
1395 out_unlock:
1396         mutex_unlock(&gpu->lock);
1397
1398         return gpu_fence;
1399 }
1400
1401 static void sync_point_worker(struct work_struct *work)
1402 {
1403         struct etnaviv_gpu *gpu = container_of(work, struct etnaviv_gpu,
1404                                                sync_point_work);
1405         struct etnaviv_event *event = &gpu->event[gpu->sync_point_event];
1406         u32 addr = gpu_read(gpu, VIVS_FE_DMA_ADDRESS);
1407
1408         event->sync_point(gpu, event);
1409         etnaviv_submit_put(event->submit);
1410         event_free(gpu, gpu->sync_point_event);
1411
1412         /* restart FE last to avoid GPU and IRQ racing against this worker */
1413         etnaviv_gpu_start_fe(gpu, addr + 2, 2);
1414 }
1415
1416 static void dump_mmu_fault(struct etnaviv_gpu *gpu)
1417 {
1418         u32 status_reg, status;
1419         int i;
1420
1421         if (gpu->sec_mode == ETNA_SEC_NONE)
1422                 status_reg = VIVS_MMUv2_STATUS;
1423         else
1424                 status_reg = VIVS_MMUv2_SEC_STATUS;
1425
1426         status = gpu_read(gpu, status_reg);
1427         dev_err_ratelimited(gpu->dev, "MMU fault status 0x%08x\n", status);
1428
1429         for (i = 0; i < 4; i++) {
1430                 u32 address_reg;
1431
1432                 if (!(status & (VIVS_MMUv2_STATUS_EXCEPTION0__MASK << (i * 4))))
1433                         continue;
1434
1435                 if (gpu->sec_mode == ETNA_SEC_NONE)
1436                         address_reg = VIVS_MMUv2_EXCEPTION_ADDR(i);
1437                 else
1438                         address_reg = VIVS_MMUv2_SEC_EXCEPTION_ADDR;
1439
1440                 dev_err_ratelimited(gpu->dev, "MMU %d fault addr 0x%08x\n", i,
1441                                     gpu_read(gpu, address_reg));
1442         }
1443 }
1444
1445 static irqreturn_t irq_handler(int irq, void *data)
1446 {
1447         struct etnaviv_gpu *gpu = data;
1448         irqreturn_t ret = IRQ_NONE;
1449
1450         u32 intr = gpu_read(gpu, VIVS_HI_INTR_ACKNOWLEDGE);
1451
1452         if (intr != 0) {
1453                 int event;
1454
1455                 pm_runtime_mark_last_busy(gpu->dev);
1456
1457                 dev_dbg(gpu->dev, "intr 0x%08x\n", intr);
1458
1459                 if (intr & VIVS_HI_INTR_ACKNOWLEDGE_AXI_BUS_ERROR) {
1460                         dev_err(gpu->dev, "AXI bus error\n");
1461                         intr &= ~VIVS_HI_INTR_ACKNOWLEDGE_AXI_BUS_ERROR;
1462                 }
1463
1464                 if (intr & VIVS_HI_INTR_ACKNOWLEDGE_MMU_EXCEPTION) {
1465                         dump_mmu_fault(gpu);
1466                         intr &= ~VIVS_HI_INTR_ACKNOWLEDGE_MMU_EXCEPTION;
1467                 }
1468
1469                 while ((event = ffs(intr)) != 0) {
1470                         struct dma_fence *fence;
1471
1472                         event -= 1;
1473
1474                         intr &= ~(1 << event);
1475
1476                         dev_dbg(gpu->dev, "event %u\n", event);
1477
1478                         if (gpu->event[event].sync_point) {
1479                                 gpu->sync_point_event = event;
1480                                 queue_work(gpu->wq, &gpu->sync_point_work);
1481                         }
1482
1483                         fence = gpu->event[event].fence;
1484                         if (!fence)
1485                                 continue;
1486
1487                         gpu->event[event].fence = NULL;
1488
1489                         /*
1490                          * Events can be processed out of order.  Eg,
1491                          * - allocate and queue event 0
1492                          * - allocate event 1
1493                          * - event 0 completes, we process it
1494                          * - allocate and queue event 0
1495                          * - event 1 and event 0 complete
1496                          * we can end up processing event 0 first, then 1.
1497                          */
1498                         if (fence_after(fence->seqno, gpu->completed_fence))
1499                                 gpu->completed_fence = fence->seqno;
1500                         dma_fence_signal(fence);
1501
1502                         event_free(gpu, event);
1503                 }
1504
1505                 ret = IRQ_HANDLED;
1506         }
1507
1508         return ret;
1509 }
1510
1511 static int etnaviv_gpu_clk_enable(struct etnaviv_gpu *gpu)
1512 {
1513         int ret;
1514
1515         ret = clk_prepare_enable(gpu->clk_reg);
1516         if (ret)
1517                 return ret;
1518
1519         ret = clk_prepare_enable(gpu->clk_bus);
1520         if (ret)
1521                 goto disable_clk_reg;
1522
1523         ret = clk_prepare_enable(gpu->clk_core);
1524         if (ret)
1525                 goto disable_clk_bus;
1526
1527         ret = clk_prepare_enable(gpu->clk_shader);
1528         if (ret)
1529                 goto disable_clk_core;
1530
1531         return 0;
1532
1533 disable_clk_core:
1534         clk_disable_unprepare(gpu->clk_core);
1535 disable_clk_bus:
1536         clk_disable_unprepare(gpu->clk_bus);
1537 disable_clk_reg:
1538         clk_disable_unprepare(gpu->clk_reg);
1539
1540         return ret;
1541 }
1542
1543 static int etnaviv_gpu_clk_disable(struct etnaviv_gpu *gpu)
1544 {
1545         clk_disable_unprepare(gpu->clk_shader);
1546         clk_disable_unprepare(gpu->clk_core);
1547         clk_disable_unprepare(gpu->clk_bus);
1548         clk_disable_unprepare(gpu->clk_reg);
1549
1550         return 0;
1551 }
1552
1553 int etnaviv_gpu_wait_idle(struct etnaviv_gpu *gpu, unsigned int timeout_ms)
1554 {
1555         unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
1556
1557         do {
1558                 u32 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE);
1559
1560                 if ((idle & gpu->idle_mask) == gpu->idle_mask)
1561                         return 0;
1562
1563                 if (time_is_before_jiffies(timeout)) {
1564                         dev_warn(gpu->dev,
1565                                  "timed out waiting for idle: idle=0x%x\n",
1566                                  idle);
1567                         return -ETIMEDOUT;
1568                 }
1569
1570                 udelay(5);
1571         } while (1);
1572 }
1573
1574 static int etnaviv_gpu_hw_suspend(struct etnaviv_gpu *gpu)
1575 {
1576         if (gpu->initialized && gpu->mmu_context) {
1577                 /* Replace the last WAIT with END */
1578                 mutex_lock(&gpu->lock);
1579                 etnaviv_buffer_end(gpu);
1580                 mutex_unlock(&gpu->lock);
1581
1582                 /*
1583                  * We know that only the FE is busy here, this should
1584                  * happen quickly (as the WAIT is only 200 cycles).  If
1585                  * we fail, just warn and continue.
1586                  */
1587                 etnaviv_gpu_wait_idle(gpu, 100);
1588
1589                 etnaviv_iommu_context_put(gpu->mmu_context);
1590                 gpu->mmu_context = NULL;
1591         }
1592
1593         gpu->exec_state = -1;
1594
1595         return etnaviv_gpu_clk_disable(gpu);
1596 }
1597
1598 #ifdef CONFIG_PM
1599 static int etnaviv_gpu_hw_resume(struct etnaviv_gpu *gpu)
1600 {
1601         int ret;
1602
1603         ret = mutex_lock_killable(&gpu->lock);
1604         if (ret)
1605                 return ret;
1606
1607         etnaviv_gpu_update_clock(gpu);
1608         etnaviv_gpu_hw_init(gpu);
1609
1610         mutex_unlock(&gpu->lock);
1611
1612         return 0;
1613 }
1614 #endif
1615
1616 static int
1617 etnaviv_gpu_cooling_get_max_state(struct thermal_cooling_device *cdev,
1618                                   unsigned long *state)
1619 {
1620         *state = 6;
1621
1622         return 0;
1623 }
1624
1625 static int
1626 etnaviv_gpu_cooling_get_cur_state(struct thermal_cooling_device *cdev,
1627                                   unsigned long *state)
1628 {
1629         struct etnaviv_gpu *gpu = cdev->devdata;
1630
1631         *state = gpu->freq_scale;
1632
1633         return 0;
1634 }
1635
1636 static int
1637 etnaviv_gpu_cooling_set_cur_state(struct thermal_cooling_device *cdev,
1638                                   unsigned long state)
1639 {
1640         struct etnaviv_gpu *gpu = cdev->devdata;
1641
1642         mutex_lock(&gpu->lock);
1643         gpu->freq_scale = state;
1644         if (!pm_runtime_suspended(gpu->dev))
1645                 etnaviv_gpu_update_clock(gpu);
1646         mutex_unlock(&gpu->lock);
1647
1648         return 0;
1649 }
1650
1651 static struct thermal_cooling_device_ops cooling_ops = {
1652         .get_max_state = etnaviv_gpu_cooling_get_max_state,
1653         .get_cur_state = etnaviv_gpu_cooling_get_cur_state,
1654         .set_cur_state = etnaviv_gpu_cooling_set_cur_state,
1655 };
1656
1657 static int etnaviv_gpu_bind(struct device *dev, struct device *master,
1658         void *data)
1659 {
1660         struct drm_device *drm = data;
1661         struct etnaviv_drm_private *priv = drm->dev_private;
1662         struct etnaviv_gpu *gpu = dev_get_drvdata(dev);
1663         int ret;
1664
1665         if (IS_ENABLED(CONFIG_DRM_ETNAVIV_THERMAL)) {
1666                 gpu->cooling = thermal_of_cooling_device_register(dev->of_node,
1667                                 (char *)dev_name(dev), gpu, &cooling_ops);
1668                 if (IS_ERR(gpu->cooling))
1669                         return PTR_ERR(gpu->cooling);
1670         }
1671
1672         gpu->wq = alloc_ordered_workqueue(dev_name(dev), 0);
1673         if (!gpu->wq) {
1674                 ret = -ENOMEM;
1675                 goto out_thermal;
1676         }
1677
1678         ret = etnaviv_sched_init(gpu);
1679         if (ret)
1680                 goto out_workqueue;
1681
1682 #ifdef CONFIG_PM
1683         ret = pm_runtime_get_sync(gpu->dev);
1684 #else
1685         ret = etnaviv_gpu_clk_enable(gpu);
1686 #endif
1687         if (ret < 0)
1688                 goto out_sched;
1689
1690
1691         gpu->drm = drm;
1692         gpu->fence_context = dma_fence_context_alloc(1);
1693         idr_init(&gpu->fence_idr);
1694         spin_lock_init(&gpu->fence_spinlock);
1695
1696         INIT_WORK(&gpu->sync_point_work, sync_point_worker);
1697         init_waitqueue_head(&gpu->fence_event);
1698
1699         priv->gpu[priv->num_gpus++] = gpu;
1700
1701         pm_runtime_mark_last_busy(gpu->dev);
1702         pm_runtime_put_autosuspend(gpu->dev);
1703
1704         return 0;
1705
1706 out_sched:
1707         etnaviv_sched_fini(gpu);
1708
1709 out_workqueue:
1710         destroy_workqueue(gpu->wq);
1711
1712 out_thermal:
1713         if (IS_ENABLED(CONFIG_DRM_ETNAVIV_THERMAL))
1714                 thermal_cooling_device_unregister(gpu->cooling);
1715
1716         return ret;
1717 }
1718
1719 static void etnaviv_gpu_unbind(struct device *dev, struct device *master,
1720         void *data)
1721 {
1722         struct etnaviv_gpu *gpu = dev_get_drvdata(dev);
1723
1724         DBG("%s", dev_name(gpu->dev));
1725
1726         flush_workqueue(gpu->wq);
1727         destroy_workqueue(gpu->wq);
1728
1729         etnaviv_sched_fini(gpu);
1730
1731 #ifdef CONFIG_PM
1732         pm_runtime_get_sync(gpu->dev);
1733         pm_runtime_put_sync_suspend(gpu->dev);
1734 #else
1735         etnaviv_gpu_hw_suspend(gpu);
1736 #endif
1737
1738         if (gpu->initialized) {
1739                 etnaviv_cmdbuf_free(&gpu->buffer);
1740                 etnaviv_iommu_global_fini(gpu);
1741                 gpu->initialized = false;
1742         }
1743
1744         gpu->drm = NULL;
1745         idr_destroy(&gpu->fence_idr);
1746
1747         if (IS_ENABLED(CONFIG_DRM_ETNAVIV_THERMAL))
1748                 thermal_cooling_device_unregister(gpu->cooling);
1749         gpu->cooling = NULL;
1750 }
1751
1752 static const struct component_ops gpu_ops = {
1753         .bind = etnaviv_gpu_bind,
1754         .unbind = etnaviv_gpu_unbind,
1755 };
1756
1757 static const struct of_device_id etnaviv_gpu_match[] = {
1758         {
1759                 .compatible = "vivante,gc"
1760         },
1761         { /* sentinel */ }
1762 };
1763 MODULE_DEVICE_TABLE(of, etnaviv_gpu_match);
1764
1765 static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
1766 {
1767         struct device *dev = &pdev->dev;
1768         struct etnaviv_gpu *gpu;
1769         int err;
1770
1771         gpu = devm_kzalloc(dev, sizeof(*gpu), GFP_KERNEL);
1772         if (!gpu)
1773                 return -ENOMEM;
1774
1775         gpu->dev = &pdev->dev;
1776         mutex_init(&gpu->lock);
1777         mutex_init(&gpu->fence_lock);
1778
1779         /* Map registers: */
1780         gpu->mmio = devm_platform_ioremap_resource(pdev, 0);
1781         if (IS_ERR(gpu->mmio))
1782                 return PTR_ERR(gpu->mmio);
1783
1784         /* Get Interrupt: */
1785         gpu->irq = platform_get_irq(pdev, 0);
1786         if (gpu->irq < 0)
1787                 return gpu->irq;
1788
1789         err = devm_request_irq(&pdev->dev, gpu->irq, irq_handler, 0,
1790                                dev_name(gpu->dev), gpu);
1791         if (err) {
1792                 dev_err(dev, "failed to request IRQ%u: %d\n", gpu->irq, err);
1793                 return err;
1794         }
1795
1796         /* Get Clocks: */
1797         gpu->clk_reg = devm_clk_get_optional(&pdev->dev, "reg");
1798         DBG("clk_reg: %p", gpu->clk_reg);
1799         if (IS_ERR(gpu->clk_reg))
1800                 return PTR_ERR(gpu->clk_reg);
1801
1802         gpu->clk_bus = devm_clk_get_optional(&pdev->dev, "bus");
1803         DBG("clk_bus: %p", gpu->clk_bus);
1804         if (IS_ERR(gpu->clk_bus))
1805                 return PTR_ERR(gpu->clk_bus);
1806
1807         gpu->clk_core = devm_clk_get(&pdev->dev, "core");
1808         DBG("clk_core: %p", gpu->clk_core);
1809         if (IS_ERR(gpu->clk_core))
1810                 return PTR_ERR(gpu->clk_core);
1811         gpu->base_rate_core = clk_get_rate(gpu->clk_core);
1812
1813         gpu->clk_shader = devm_clk_get_optional(&pdev->dev, "shader");
1814         DBG("clk_shader: %p", gpu->clk_shader);
1815         if (IS_ERR(gpu->clk_shader))
1816                 return PTR_ERR(gpu->clk_shader);
1817         gpu->base_rate_shader = clk_get_rate(gpu->clk_shader);
1818
1819         /* TODO: figure out max mapped size */
1820         dev_set_drvdata(dev, gpu);
1821
1822         /*
1823          * We treat the device as initially suspended.  The runtime PM
1824          * autosuspend delay is rather arbitary: no measurements have
1825          * yet been performed to determine an appropriate value.
1826          */
1827         pm_runtime_use_autosuspend(gpu->dev);
1828         pm_runtime_set_autosuspend_delay(gpu->dev, 200);
1829         pm_runtime_enable(gpu->dev);
1830
1831         err = component_add(&pdev->dev, &gpu_ops);
1832         if (err < 0) {
1833                 dev_err(&pdev->dev, "failed to register component: %d\n", err);
1834                 return err;
1835         }
1836
1837         return 0;
1838 }
1839
1840 static int etnaviv_gpu_platform_remove(struct platform_device *pdev)
1841 {
1842         component_del(&pdev->dev, &gpu_ops);
1843         pm_runtime_disable(&pdev->dev);
1844         return 0;
1845 }
1846
1847 #ifdef CONFIG_PM
1848 static int etnaviv_gpu_rpm_suspend(struct device *dev)
1849 {
1850         struct etnaviv_gpu *gpu = dev_get_drvdata(dev);
1851         u32 idle, mask;
1852
1853         /* If there are any jobs in the HW queue, we're not idle */
1854         if (atomic_read(&gpu->sched.hw_rq_count))
1855                 return -EBUSY;
1856
1857         /* Check whether the hardware (except FE and MC) is idle */
1858         mask = gpu->idle_mask & ~(VIVS_HI_IDLE_STATE_FE |
1859                                   VIVS_HI_IDLE_STATE_MC);
1860         idle = gpu_read(gpu, VIVS_HI_IDLE_STATE) & mask;
1861         if (idle != mask) {
1862                 dev_warn_ratelimited(dev, "GPU not yet idle, mask: 0x%08x\n",
1863                                      idle);
1864                 return -EBUSY;
1865         }
1866
1867         return etnaviv_gpu_hw_suspend(gpu);
1868 }
1869
1870 static int etnaviv_gpu_rpm_resume(struct device *dev)
1871 {
1872         struct etnaviv_gpu *gpu = dev_get_drvdata(dev);
1873         int ret;
1874
1875         ret = etnaviv_gpu_clk_enable(gpu);
1876         if (ret)
1877                 return ret;
1878
1879         /* Re-initialise the basic hardware state */
1880         if (gpu->drm && gpu->initialized) {
1881                 ret = etnaviv_gpu_hw_resume(gpu);
1882                 if (ret) {
1883                         etnaviv_gpu_clk_disable(gpu);
1884                         return ret;
1885                 }
1886         }
1887
1888         return 0;
1889 }
1890 #endif
1891
1892 static const struct dev_pm_ops etnaviv_gpu_pm_ops = {
1893         SET_RUNTIME_PM_OPS(etnaviv_gpu_rpm_suspend, etnaviv_gpu_rpm_resume,
1894                            NULL)
1895 };
1896
1897 struct platform_driver etnaviv_gpu_driver = {
1898         .driver = {
1899                 .name = "etnaviv-gpu",
1900                 .owner = THIS_MODULE,
1901                 .pm = &etnaviv_gpu_pm_ops,
1902                 .of_match_table = etnaviv_gpu_match,
1903         },
1904         .probe = etnaviv_gpu_platform_probe,
1905         .remove = etnaviv_gpu_platform_remove,
1906         .id_table = gpu_ids,
1907 };