1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2015-2018 Etnaviv Project 4 */ 5 6 #include <linux/component.h> 7 #include <linux/dma-fence.h> 8 #include <linux/moduleparam.h> 9 #include <linux/of_device.h> 10 #include <linux/thermal.h> 11 12 #include "etnaviv_cmdbuf.h" 13 #include "etnaviv_dump.h" 14 #include "etnaviv_gpu.h" 15 #include "etnaviv_gem.h" 16 #include "etnaviv_mmu.h" 17 #include "etnaviv_perfmon.h" 18 #include "etnaviv_sched.h" 19 #include "common.xml.h" 20 #include "state.xml.h" 21 #include "state_hi.xml.h" 22 #include "cmdstream.xml.h" 23 24 #ifndef PHYS_OFFSET 25 #define PHYS_OFFSET 0 26 #endif 27 28 static const struct platform_device_id gpu_ids[] = { 29 { .name = "etnaviv-gpu,2d" }, 30 { }, 31 }; 32 33 /* 34 * Driver functions: 35 */ 36 37 int etnaviv_gpu_get_param(struct etnaviv_gpu *gpu, u32 param, u64 *value) 38 { 39 switch (param) { 40 case ETNAVIV_PARAM_GPU_MODEL: 41 *value = gpu->identity.model; 42 break; 43 44 case ETNAVIV_PARAM_GPU_REVISION: 45 *value = gpu->identity.revision; 46 break; 47 48 case ETNAVIV_PARAM_GPU_FEATURES_0: 49 *value = gpu->identity.features; 50 break; 51 52 case ETNAVIV_PARAM_GPU_FEATURES_1: 53 *value = gpu->identity.minor_features0; 54 break; 55 56 case ETNAVIV_PARAM_GPU_FEATURES_2: 57 *value = gpu->identity.minor_features1; 58 break; 59 60 case ETNAVIV_PARAM_GPU_FEATURES_3: 61 *value = gpu->identity.minor_features2; 62 break; 63 64 case ETNAVIV_PARAM_GPU_FEATURES_4: 65 *value = gpu->identity.minor_features3; 66 break; 67 68 case ETNAVIV_PARAM_GPU_FEATURES_5: 69 *value = gpu->identity.minor_features4; 70 break; 71 72 case ETNAVIV_PARAM_GPU_FEATURES_6: 73 *value = gpu->identity.minor_features5; 74 break; 75 76 case ETNAVIV_PARAM_GPU_FEATURES_7: 77 *value = gpu->identity.minor_features6; 78 break; 79 80 case ETNAVIV_PARAM_GPU_FEATURES_8: 81 *value = gpu->identity.minor_features7; 82 break; 83 84 case ETNAVIV_PARAM_GPU_FEATURES_9: 85 *value = gpu->identity.minor_features8; 86 break; 87 88 case ETNAVIV_PARAM_GPU_FEATURES_10: 89 *value = gpu->identity.minor_features9; 90 break; 91 92 case ETNAVIV_PARAM_GPU_FEATURES_11: 93 *value = gpu->identity.minor_features10; 94 break; 95 96 case ETNAVIV_PARAM_GPU_FEATURES_12: 97 *value = gpu->identity.minor_features11; 98 break; 99 100 case ETNAVIV_PARAM_GPU_STREAM_COUNT: 101 *value = gpu->identity.stream_count; 102 break; 103 104 case ETNAVIV_PARAM_GPU_REGISTER_MAX: 105 *value = gpu->identity.register_max; 106 break; 107 108 case ETNAVIV_PARAM_GPU_THREAD_COUNT: 109 *value = gpu->identity.thread_count; 110 break; 111 112 case ETNAVIV_PARAM_GPU_VERTEX_CACHE_SIZE: 113 *value = gpu->identity.vertex_cache_size; 114 break; 115 116 case ETNAVIV_PARAM_GPU_SHADER_CORE_COUNT: 117 *value = gpu->identity.shader_core_count; 118 break; 119 120 case ETNAVIV_PARAM_GPU_PIXEL_PIPES: 121 *value = gpu->identity.pixel_pipes; 122 break; 123 124 case ETNAVIV_PARAM_GPU_VERTEX_OUTPUT_BUFFER_SIZE: 125 *value = gpu->identity.vertex_output_buffer_size; 126 break; 127 128 case ETNAVIV_PARAM_GPU_BUFFER_SIZE: 129 *value = gpu->identity.buffer_size; 130 break; 131 132 case ETNAVIV_PARAM_GPU_INSTRUCTION_COUNT: 133 *value = gpu->identity.instruction_count; 134 break; 135 136 case ETNAVIV_PARAM_GPU_NUM_CONSTANTS: 137 *value = gpu->identity.num_constants; 138 break; 139 140 case ETNAVIV_PARAM_GPU_NUM_VARYINGS: 141 *value = gpu->identity.varyings_count; 142 break; 143 144 default: 145 DBG("%s: invalid param: %u", dev_name(gpu->dev), param); 146 return -EINVAL; 147 } 148 149 return 0; 150 } 151 152 153 #define etnaviv_is_model_rev(gpu, mod, rev) \ 154 ((gpu)->identity.model == chipModel_##mod && \ 155 (gpu)->identity.revision == rev) 156 #define etnaviv_field(val, field) \ 157 (((val) & field##__MASK) >> field##__SHIFT) 158 159 static void etnaviv_hw_specs(struct etnaviv_gpu *gpu) 160 { 161 if (gpu->identity.minor_features0 & 162 chipMinorFeatures0_MORE_MINOR_FEATURES) { 163 u32 specs[4]; 164 unsigned int streams; 165 166 specs[0] = gpu_read(gpu, VIVS_HI_CHIP_SPECS); 167 specs[1] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_2); 168 specs[2] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_3); 169 specs[3] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_4); 170 171 gpu->identity.stream_count = etnaviv_field(specs[0], 172 VIVS_HI_CHIP_SPECS_STREAM_COUNT); 173 gpu->identity.register_max = etnaviv_field(specs[0], 174 VIVS_HI_CHIP_SPECS_REGISTER_MAX); 175 gpu->identity.thread_count = etnaviv_field(specs[0], 176 VIVS_HI_CHIP_SPECS_THREAD_COUNT); 177 gpu->identity.vertex_cache_size = etnaviv_field(specs[0], 178 VIVS_HI_CHIP_SPECS_VERTEX_CACHE_SIZE); 179 gpu->identity.shader_core_count = etnaviv_field(specs[0], 180 VIVS_HI_CHIP_SPECS_SHADER_CORE_COUNT); 181 gpu->identity.pixel_pipes = etnaviv_field(specs[0], 182 VIVS_HI_CHIP_SPECS_PIXEL_PIPES); 183 gpu->identity.vertex_output_buffer_size = 184 etnaviv_field(specs[0], 185 VIVS_HI_CHIP_SPECS_VERTEX_OUTPUT_BUFFER_SIZE); 186 187 gpu->identity.buffer_size = etnaviv_field(specs[1], 188 VIVS_HI_CHIP_SPECS_2_BUFFER_SIZE); 189 gpu->identity.instruction_count = etnaviv_field(specs[1], 190 VIVS_HI_CHIP_SPECS_2_INSTRUCTION_COUNT); 191 gpu->identity.num_constants = etnaviv_field(specs[1], 192 VIVS_HI_CHIP_SPECS_2_NUM_CONSTANTS); 193 194 gpu->identity.varyings_count = etnaviv_field(specs[2], 195 VIVS_HI_CHIP_SPECS_3_VARYINGS_COUNT); 196 197 /* This overrides the value from older register if non-zero */ 198 streams = etnaviv_field(specs[3], 199 VIVS_HI_CHIP_SPECS_4_STREAM_COUNT); 200 if (streams) 201 gpu->identity.stream_count = streams; 202 } 203 204 /* Fill in the stream count if not specified */ 205 if (gpu->identity.stream_count == 0) { 206 if (gpu->identity.model >= 0x1000) 207 gpu->identity.stream_count = 4; 208 else 209 gpu->identity.stream_count = 1; 210 } 211 212 /* Convert the register max value */ 213 if (gpu->identity.register_max) 214 gpu->identity.register_max = 1 << gpu->identity.register_max; 215 else if (gpu->identity.model == chipModel_GC400) 216 gpu->identity.register_max = 32; 217 else 218 gpu->identity.register_max = 64; 219 220 /* Convert thread count */ 221 if (gpu->identity.thread_count) 222 gpu->identity.thread_count = 1 << gpu->identity.thread_count; 223 else if (gpu->identity.model == chipModel_GC400) 224 gpu->identity.thread_count = 64; 225 else if (gpu->identity.model == chipModel_GC500 || 226 gpu->identity.model == chipModel_GC530) 227 gpu->identity.thread_count = 128; 228 else 229 gpu->identity.thread_count = 256; 230 231 if (gpu->identity.vertex_cache_size == 0) 232 gpu->identity.vertex_cache_size = 8; 233 234 if (gpu->identity.shader_core_count == 0) { 235 if (gpu->identity.model >= 0x1000) 236 gpu->identity.shader_core_count = 2; 237 else 238 gpu->identity.shader_core_count = 1; 239 } 240 241 if (gpu->identity.pixel_pipes == 0) 242 gpu->identity.pixel_pipes = 1; 243 244 /* Convert virtex buffer size */ 245 if (gpu->identity.vertex_output_buffer_size) { 246 gpu->identity.vertex_output_buffer_size = 247 1 << gpu->identity.vertex_output_buffer_size; 248 } else if (gpu->identity.model == chipModel_GC400) { 249 if (gpu->identity.revision < 0x4000) 250 gpu->identity.vertex_output_buffer_size = 512; 251 else if (gpu->identity.revision < 0x4200) 252 gpu->identity.vertex_output_buffer_size = 256; 253 else 254 gpu->identity.vertex_output_buffer_size = 128; 255 } else { 256 gpu->identity.vertex_output_buffer_size = 512; 257 } 258 259 switch (gpu->identity.instruction_count) { 260 case 0: 261 if (etnaviv_is_model_rev(gpu, GC2000, 0x5108) || 262 gpu->identity.model == chipModel_GC880) 263 gpu->identity.instruction_count = 512; 264 else 265 gpu->identity.instruction_count = 256; 266 break; 267 268 case 1: 269 gpu->identity.instruction_count = 1024; 270 break; 271 272 case 2: 273 gpu->identity.instruction_count = 2048; 274 break; 275 276 default: 277 gpu->identity.instruction_count = 256; 278 break; 279 } 280 281 if (gpu->identity.num_constants == 0) 282 gpu->identity.num_constants = 168; 283 284 if (gpu->identity.varyings_count == 0) { 285 if (gpu->identity.minor_features1 & chipMinorFeatures1_HALTI0) 286 gpu->identity.varyings_count = 12; 287 else 288 gpu->identity.varyings_count = 8; 289 } 290 291 /* 292 * For some cores, two varyings are consumed for position, so the 293 * maximum varying count needs to be reduced by one. 294 */ 295 if (etnaviv_is_model_rev(gpu, GC5000, 0x5434) || 296 etnaviv_is_model_rev(gpu, GC4000, 0x5222) || 297 etnaviv_is_model_rev(gpu, GC4000, 0x5245) || 298 etnaviv_is_model_rev(gpu, GC4000, 0x5208) || 299 etnaviv_is_model_rev(gpu, GC3000, 0x5435) || 300 etnaviv_is_model_rev(gpu, GC2200, 0x5244) || 301 etnaviv_is_model_rev(gpu, GC2100, 0x5108) || 302 etnaviv_is_model_rev(gpu, GC2000, 0x5108) || 303 etnaviv_is_model_rev(gpu, GC1500, 0x5246) || 304 etnaviv_is_model_rev(gpu, GC880, 0x5107) || 305 etnaviv_is_model_rev(gpu, GC880, 0x5106)) 306 gpu->identity.varyings_count -= 1; 307 } 308 309 static void etnaviv_hw_identify(struct etnaviv_gpu *gpu) 310 { 311 u32 chipIdentity; 312 313 chipIdentity = gpu_read(gpu, VIVS_HI_CHIP_IDENTITY); 314 315 /* Special case for older graphic cores. */ 316 if (etnaviv_field(chipIdentity, VIVS_HI_CHIP_IDENTITY_FAMILY) == 0x01) { 317 gpu->identity.model = chipModel_GC500; 318 gpu->identity.revision = etnaviv_field(chipIdentity, 319 VIVS_HI_CHIP_IDENTITY_REVISION); 320 } else { 321 322 gpu->identity.model = gpu_read(gpu, VIVS_HI_CHIP_MODEL); 323 gpu->identity.revision = gpu_read(gpu, VIVS_HI_CHIP_REV); 324 325 /* 326 * !!!! HACK ALERT !!!! 327 * Because people change device IDs without letting software 328 * know about it - here is the hack to make it all look the 329 * same. Only for GC400 family. 330 */ 331 if ((gpu->identity.model & 0xff00) == 0x0400 && 332 gpu->identity.model != chipModel_GC420) { 333 gpu->identity.model = gpu->identity.model & 0x0400; 334 } 335 336 /* Another special case */ 337 if (etnaviv_is_model_rev(gpu, GC300, 0x2201)) { 338 u32 chipDate = gpu_read(gpu, VIVS_HI_CHIP_DATE); 339 u32 chipTime = gpu_read(gpu, VIVS_HI_CHIP_TIME); 340 341 if (chipDate == 0x20080814 && chipTime == 0x12051100) { 342 /* 343 * This IP has an ECO; put the correct 344 * revision in it. 345 */ 346 gpu->identity.revision = 0x1051; 347 } 348 } 349 350 /* 351 * NXP likes to call the GPU on the i.MX6QP GC2000+, but in 352 * reality it's just a re-branded GC3000. We can identify this 353 * core by the upper half of the revision register being all 1. 354 * Fix model/rev here, so all other places can refer to this 355 * core by its real identity. 356 */ 357 if (etnaviv_is_model_rev(gpu, GC2000, 0xffff5450)) { 358 gpu->identity.model = chipModel_GC3000; 359 gpu->identity.revision &= 0xffff; 360 } 361 } 362 363 dev_info(gpu->dev, "model: GC%x, revision: %x\n", 364 gpu->identity.model, gpu->identity.revision); 365 366 /* 367 * If there is a match in the HWDB, we aren't interested in the 368 * remaining register values, as they might be wrong. 369 */ 370 if (etnaviv_fill_identity_from_hwdb(gpu)) 371 return; 372 373 gpu->identity.features = gpu_read(gpu, VIVS_HI_CHIP_FEATURE); 374 375 /* Disable fast clear on GC700. */ 376 if (gpu->identity.model == chipModel_GC700) 377 gpu->identity.features &= ~chipFeatures_FAST_CLEAR; 378 379 if ((gpu->identity.model == chipModel_GC500 && 380 gpu->identity.revision < 2) || 381 (gpu->identity.model == chipModel_GC300 && 382 gpu->identity.revision < 0x2000)) { 383 384 /* 385 * GC500 rev 1.x and GC300 rev < 2.0 doesn't have these 386 * registers. 387 */ 388 gpu->identity.minor_features0 = 0; 389 gpu->identity.minor_features1 = 0; 390 gpu->identity.minor_features2 = 0; 391 gpu->identity.minor_features3 = 0; 392 gpu->identity.minor_features4 = 0; 393 gpu->identity.minor_features5 = 0; 394 } else 395 gpu->identity.minor_features0 = 396 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_0); 397 398 if (gpu->identity.minor_features0 & 399 chipMinorFeatures0_MORE_MINOR_FEATURES) { 400 gpu->identity.minor_features1 = 401 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_1); 402 gpu->identity.minor_features2 = 403 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_2); 404 gpu->identity.minor_features3 = 405 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_3); 406 gpu->identity.minor_features4 = 407 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_4); 408 gpu->identity.minor_features5 = 409 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_5); 410 } 411 412 /* GC600 idle register reports zero bits where modules aren't present */ 413 if (gpu->identity.model == chipModel_GC600) { 414 gpu->idle_mask = VIVS_HI_IDLE_STATE_TX | 415 VIVS_HI_IDLE_STATE_RA | 416 VIVS_HI_IDLE_STATE_SE | 417 VIVS_HI_IDLE_STATE_PA | 418 VIVS_HI_IDLE_STATE_SH | 419 VIVS_HI_IDLE_STATE_PE | 420 VIVS_HI_IDLE_STATE_DE | 421 VIVS_HI_IDLE_STATE_FE; 422 } else { 423 gpu->idle_mask = ~VIVS_HI_IDLE_STATE_AXI_LP; 424 } 425 426 etnaviv_hw_specs(gpu); 427 } 428 429 static void etnaviv_gpu_load_clock(struct etnaviv_gpu *gpu, u32 clock) 430 { 431 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock | 432 VIVS_HI_CLOCK_CONTROL_FSCALE_CMD_LOAD); 433 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock); 434 } 435 436 static void etnaviv_gpu_update_clock(struct etnaviv_gpu *gpu) 437 { 438 if (gpu->identity.minor_features2 & 439 chipMinorFeatures2_DYNAMIC_FREQUENCY_SCALING) { 440 clk_set_rate(gpu->clk_core, 441 gpu->base_rate_core >> gpu->freq_scale); 442 clk_set_rate(gpu->clk_shader, 443 gpu->base_rate_shader >> gpu->freq_scale); 444 } else { 445 unsigned int fscale = 1 << (6 - gpu->freq_scale); 446 u32 clock = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); 447 448 clock &= ~VIVS_HI_CLOCK_CONTROL_FSCALE_VAL__MASK; 449 clock |= VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(fscale); 450 etnaviv_gpu_load_clock(gpu, clock); 451 } 452 } 453 454 static int etnaviv_hw_reset(struct etnaviv_gpu *gpu) 455 { 456 u32 control, idle; 457 unsigned long timeout; 458 bool failed = true; 459 460 /* We hope that the GPU resets in under one second */ 461 timeout = jiffies + msecs_to_jiffies(1000); 462 463 while (time_is_after_jiffies(timeout)) { 464 /* enable clock */ 465 unsigned int fscale = 1 << (6 - gpu->freq_scale); 466 control = VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(fscale); 467 etnaviv_gpu_load_clock(gpu, control); 468 469 /* isolate the GPU. */ 470 control |= VIVS_HI_CLOCK_CONTROL_ISOLATE_GPU; 471 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); 472 473 if (gpu->sec_mode == ETNA_SEC_KERNEL) { 474 gpu_write(gpu, VIVS_MMUv2_AHB_CONTROL, 475 VIVS_MMUv2_AHB_CONTROL_RESET); 476 } else { 477 /* set soft reset. */ 478 control |= VIVS_HI_CLOCK_CONTROL_SOFT_RESET; 479 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); 480 } 481 482 /* wait for reset. */ 483 usleep_range(10, 20); 484 485 /* reset soft reset bit. */ 486 control &= ~VIVS_HI_CLOCK_CONTROL_SOFT_RESET; 487 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); 488 489 /* reset GPU isolation. */ 490 control &= ~VIVS_HI_CLOCK_CONTROL_ISOLATE_GPU; 491 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); 492 493 /* read idle register. */ 494 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); 495 496 /* try reseting again if FE it not idle */ 497 if ((idle & VIVS_HI_IDLE_STATE_FE) == 0) { 498 dev_dbg(gpu->dev, "FE is not idle\n"); 499 continue; 500 } 501 502 /* read reset register. */ 503 control = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); 504 505 /* is the GPU idle? */ 506 if (((control & VIVS_HI_CLOCK_CONTROL_IDLE_3D) == 0) || 507 ((control & VIVS_HI_CLOCK_CONTROL_IDLE_2D) == 0)) { 508 dev_dbg(gpu->dev, "GPU is not idle\n"); 509 continue; 510 } 511 512 /* disable debug registers, as they are not normally needed */ 513 control |= VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS; 514 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); 515 516 failed = false; 517 break; 518 } 519 520 if (failed) { 521 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); 522 control = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); 523 524 dev_err(gpu->dev, "GPU failed to reset: FE %sidle, 3D %sidle, 2D %sidle\n", 525 idle & VIVS_HI_IDLE_STATE_FE ? "" : "not ", 526 control & VIVS_HI_CLOCK_CONTROL_IDLE_3D ? "" : "not ", 527 control & VIVS_HI_CLOCK_CONTROL_IDLE_2D ? "" : "not "); 528 529 return -EBUSY; 530 } 531 532 /* We rely on the GPU running, so program the clock */ 533 etnaviv_gpu_update_clock(gpu); 534 535 return 0; 536 } 537 538 static void etnaviv_gpu_enable_mlcg(struct etnaviv_gpu *gpu) 539 { 540 u32 pmc, ppc; 541 542 /* enable clock gating */ 543 ppc = gpu_read(gpu, VIVS_PM_POWER_CONTROLS); 544 ppc |= VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING; 545 546 /* Disable stall module clock gating for 4.3.0.1 and 4.3.0.2 revs */ 547 if (gpu->identity.revision == 0x4301 || 548 gpu->identity.revision == 0x4302) 549 ppc |= VIVS_PM_POWER_CONTROLS_DISABLE_STALL_MODULE_CLOCK_GATING; 550 551 gpu_write(gpu, VIVS_PM_POWER_CONTROLS, ppc); 552 553 pmc = gpu_read(gpu, VIVS_PM_MODULE_CONTROLS); 554 555 /* Disable PA clock gating for GC400+ without bugfix except for GC420 */ 556 if (gpu->identity.model >= chipModel_GC400 && 557 gpu->identity.model != chipModel_GC420 && 558 !(gpu->identity.minor_features3 & chipMinorFeatures3_BUG_FIXES12)) 559 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PA; 560 561 /* 562 * Disable PE clock gating on revs < 5.0.0.0 when HZ is 563 * present without a bug fix. 564 */ 565 if (gpu->identity.revision < 0x5000 && 566 gpu->identity.minor_features0 & chipMinorFeatures0_HZ && 567 !(gpu->identity.minor_features1 & 568 chipMinorFeatures1_DISABLE_PE_GATING)) 569 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PE; 570 571 if (gpu->identity.revision < 0x5422) 572 pmc |= BIT(15); /* Unknown bit */ 573 574 /* Disable TX clock gating on affected core revisions. */ 575 if (etnaviv_is_model_rev(gpu, GC4000, 0x5222) || 576 etnaviv_is_model_rev(gpu, GC2000, 0x5108)) 577 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_TX; 578 579 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_HZ; 580 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_EZ; 581 582 gpu_write(gpu, VIVS_PM_MODULE_CONTROLS, pmc); 583 } 584 585 void etnaviv_gpu_start_fe(struct etnaviv_gpu *gpu, u32 address, u16 prefetch) 586 { 587 gpu_write(gpu, VIVS_FE_COMMAND_ADDRESS, address); 588 gpu_write(gpu, VIVS_FE_COMMAND_CONTROL, 589 VIVS_FE_COMMAND_CONTROL_ENABLE | 590 VIVS_FE_COMMAND_CONTROL_PREFETCH(prefetch)); 591 592 if (gpu->sec_mode == ETNA_SEC_KERNEL) { 593 gpu_write(gpu, VIVS_MMUv2_SEC_COMMAND_CONTROL, 594 VIVS_MMUv2_SEC_COMMAND_CONTROL_ENABLE | 595 VIVS_MMUv2_SEC_COMMAND_CONTROL_PREFETCH(prefetch)); 596 } 597 } 598 599 static void etnaviv_gpu_setup_pulse_eater(struct etnaviv_gpu *gpu) 600 { 601 /* 602 * Base value for VIVS_PM_PULSE_EATER register on models where it 603 * cannot be read, extracted from vivante kernel driver. 604 */ 605 u32 pulse_eater = 0x01590880; 606 607 if (etnaviv_is_model_rev(gpu, GC4000, 0x5208) || 608 etnaviv_is_model_rev(gpu, GC4000, 0x5222)) { 609 pulse_eater |= BIT(23); 610 611 } 612 613 if (etnaviv_is_model_rev(gpu, GC1000, 0x5039) || 614 etnaviv_is_model_rev(gpu, GC1000, 0x5040)) { 615 pulse_eater &= ~BIT(16); 616 pulse_eater |= BIT(17); 617 } 618 619 if ((gpu->identity.revision > 0x5420) && 620 (gpu->identity.features & chipFeatures_PIPE_3D)) 621 { 622 /* Performance fix: disable internal DFS */ 623 pulse_eater = gpu_read(gpu, VIVS_PM_PULSE_EATER); 624 pulse_eater |= BIT(18); 625 } 626 627 gpu_write(gpu, VIVS_PM_PULSE_EATER, pulse_eater); 628 } 629 630 static void etnaviv_gpu_hw_init(struct etnaviv_gpu *gpu) 631 { 632 u16 prefetch; 633 634 if ((etnaviv_is_model_rev(gpu, GC320, 0x5007) || 635 etnaviv_is_model_rev(gpu, GC320, 0x5220)) && 636 gpu_read(gpu, VIVS_HI_CHIP_TIME) != 0x2062400) { 637 u32 mc_memory_debug; 638 639 mc_memory_debug = gpu_read(gpu, VIVS_MC_DEBUG_MEMORY) & ~0xff; 640 641 if (gpu->identity.revision == 0x5007) 642 mc_memory_debug |= 0x0c; 643 else 644 mc_memory_debug |= 0x08; 645 646 gpu_write(gpu, VIVS_MC_DEBUG_MEMORY, mc_memory_debug); 647 } 648 649 /* enable module-level clock gating */ 650 etnaviv_gpu_enable_mlcg(gpu); 651 652 /* 653 * Update GPU AXI cache atttribute to "cacheable, no allocate". 654 * This is necessary to prevent the iMX6 SoC locking up. 655 */ 656 gpu_write(gpu, VIVS_HI_AXI_CONFIG, 657 VIVS_HI_AXI_CONFIG_AWCACHE(2) | 658 VIVS_HI_AXI_CONFIG_ARCACHE(2)); 659 660 /* GC2000 rev 5108 needs a special bus config */ 661 if (etnaviv_is_model_rev(gpu, GC2000, 0x5108)) { 662 u32 bus_config = gpu_read(gpu, VIVS_MC_BUS_CONFIG); 663 bus_config &= ~(VIVS_MC_BUS_CONFIG_FE_BUS_CONFIG__MASK | 664 VIVS_MC_BUS_CONFIG_TX_BUS_CONFIG__MASK); 665 bus_config |= VIVS_MC_BUS_CONFIG_FE_BUS_CONFIG(1) | 666 VIVS_MC_BUS_CONFIG_TX_BUS_CONFIG(0); 667 gpu_write(gpu, VIVS_MC_BUS_CONFIG, bus_config); 668 } 669 670 if (gpu->sec_mode == ETNA_SEC_KERNEL) { 671 u32 val = gpu_read(gpu, VIVS_MMUv2_AHB_CONTROL); 672 val |= VIVS_MMUv2_AHB_CONTROL_NONSEC_ACCESS; 673 gpu_write(gpu, VIVS_MMUv2_AHB_CONTROL, val); 674 } 675 676 /* setup the pulse eater */ 677 etnaviv_gpu_setup_pulse_eater(gpu); 678 679 /* setup the MMU */ 680 etnaviv_iommu_restore(gpu); 681 682 /* Start command processor */ 683 prefetch = etnaviv_buffer_init(gpu); 684 685 gpu_write(gpu, VIVS_HI_INTR_ENBL, ~0U); 686 etnaviv_gpu_start_fe(gpu, etnaviv_cmdbuf_get_va(&gpu->buffer), 687 prefetch); 688 } 689 690 int etnaviv_gpu_init(struct etnaviv_gpu *gpu) 691 { 692 int ret, i; 693 694 ret = pm_runtime_get_sync(gpu->dev); 695 if (ret < 0) { 696 dev_err(gpu->dev, "Failed to enable GPU power domain\n"); 697 return ret; 698 } 699 700 etnaviv_hw_identify(gpu); 701 702 if (gpu->identity.model == 0) { 703 dev_err(gpu->dev, "Unknown GPU model\n"); 704 ret = -ENXIO; 705 goto fail; 706 } 707 708 /* Exclude VG cores with FE2.0 */ 709 if (gpu->identity.features & chipFeatures_PIPE_VG && 710 gpu->identity.features & chipFeatures_FE20) { 711 dev_info(gpu->dev, "Ignoring GPU with VG and FE2.0\n"); 712 ret = -ENXIO; 713 goto fail; 714 } 715 716 /* 717 * Set the GPU linear window to be at the end of the DMA window, where 718 * the CMA area is likely to reside. This ensures that we are able to 719 * map the command buffers while having the linear window overlap as 720 * much RAM as possible, so we can optimize mappings for other buffers. 721 * 722 * For 3D cores only do this if MC2.0 is present, as with MC1.0 it leads 723 * to different views of the memory on the individual engines. 724 */ 725 if (!(gpu->identity.features & chipFeatures_PIPE_3D) || 726 (gpu->identity.minor_features0 & chipMinorFeatures0_MC20)) { 727 u32 dma_mask = (u32)dma_get_required_mask(gpu->dev); 728 if (dma_mask < PHYS_OFFSET + SZ_2G) 729 gpu->memory_base = PHYS_OFFSET; 730 else 731 gpu->memory_base = dma_mask - SZ_2G + 1; 732 } else if (PHYS_OFFSET >= SZ_2G) { 733 dev_info(gpu->dev, "Need to move linear window on MC1.0, disabling TS\n"); 734 gpu->memory_base = PHYS_OFFSET; 735 gpu->identity.features &= ~chipFeatures_FAST_CLEAR; 736 } 737 738 /* 739 * On cores with security features supported, we claim control over the 740 * security states. 741 */ 742 if ((gpu->identity.minor_features7 & chipMinorFeatures7_BIT_SECURITY) && 743 (gpu->identity.minor_features10 & chipMinorFeatures10_SECURITY_AHB)) 744 gpu->sec_mode = ETNA_SEC_KERNEL; 745 746 ret = etnaviv_hw_reset(gpu); 747 if (ret) { 748 dev_err(gpu->dev, "GPU reset failed\n"); 749 goto fail; 750 } 751 752 gpu->mmu = etnaviv_iommu_new(gpu); 753 if (IS_ERR(gpu->mmu)) { 754 dev_err(gpu->dev, "Failed to instantiate GPU IOMMU\n"); 755 ret = PTR_ERR(gpu->mmu); 756 goto fail; 757 } 758 759 gpu->cmdbuf_suballoc = etnaviv_cmdbuf_suballoc_new(gpu); 760 if (IS_ERR(gpu->cmdbuf_suballoc)) { 761 dev_err(gpu->dev, "Failed to create cmdbuf suballocator\n"); 762 ret = PTR_ERR(gpu->cmdbuf_suballoc); 763 goto fail; 764 } 765 766 /* Create buffer: */ 767 ret = etnaviv_cmdbuf_init(gpu->cmdbuf_suballoc, &gpu->buffer, 768 PAGE_SIZE); 769 if (ret) { 770 dev_err(gpu->dev, "could not create command buffer\n"); 771 goto destroy_iommu; 772 } 773 774 if (gpu->mmu->version == ETNAVIV_IOMMU_V1 && 775 etnaviv_cmdbuf_get_va(&gpu->buffer) > 0x80000000) { 776 ret = -EINVAL; 777 dev_err(gpu->dev, 778 "command buffer outside valid memory window\n"); 779 goto free_buffer; 780 } 781 782 /* Setup event management */ 783 spin_lock_init(&gpu->event_spinlock); 784 init_completion(&gpu->event_free); 785 bitmap_zero(gpu->event_bitmap, ETNA_NR_EVENTS); 786 for (i = 0; i < ARRAY_SIZE(gpu->event); i++) 787 complete(&gpu->event_free); 788 789 /* Now program the hardware */ 790 mutex_lock(&gpu->lock); 791 etnaviv_gpu_hw_init(gpu); 792 gpu->exec_state = -1; 793 mutex_unlock(&gpu->lock); 794 795 pm_runtime_mark_last_busy(gpu->dev); 796 pm_runtime_put_autosuspend(gpu->dev); 797 798 return 0; 799 800 free_buffer: 801 etnaviv_cmdbuf_free(&gpu->buffer); 802 gpu->buffer.suballoc = NULL; 803 destroy_iommu: 804 etnaviv_iommu_destroy(gpu->mmu); 805 gpu->mmu = NULL; 806 fail: 807 pm_runtime_mark_last_busy(gpu->dev); 808 pm_runtime_put_autosuspend(gpu->dev); 809 810 return ret; 811 } 812 813 #ifdef CONFIG_DEBUG_FS 814 struct dma_debug { 815 u32 address[2]; 816 u32 state[2]; 817 }; 818 819 static void verify_dma(struct etnaviv_gpu *gpu, struct dma_debug *debug) 820 { 821 u32 i; 822 823 debug->address[0] = gpu_read(gpu, VIVS_FE_DMA_ADDRESS); 824 debug->state[0] = gpu_read(gpu, VIVS_FE_DMA_DEBUG_STATE); 825 826 for (i = 0; i < 500; i++) { 827 debug->address[1] = gpu_read(gpu, VIVS_FE_DMA_ADDRESS); 828 debug->state[1] = gpu_read(gpu, VIVS_FE_DMA_DEBUG_STATE); 829 830 if (debug->address[0] != debug->address[1]) 831 break; 832 833 if (debug->state[0] != debug->state[1]) 834 break; 835 } 836 } 837 838 int etnaviv_gpu_debugfs(struct etnaviv_gpu *gpu, struct seq_file *m) 839 { 840 struct dma_debug debug; 841 u32 dma_lo, dma_hi, axi, idle; 842 int ret; 843 844 seq_printf(m, "%s Status:\n", dev_name(gpu->dev)); 845 846 ret = pm_runtime_get_sync(gpu->dev); 847 if (ret < 0) 848 return ret; 849 850 dma_lo = gpu_read(gpu, VIVS_FE_DMA_LOW); 851 dma_hi = gpu_read(gpu, VIVS_FE_DMA_HIGH); 852 axi = gpu_read(gpu, VIVS_HI_AXI_STATUS); 853 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); 854 855 verify_dma(gpu, &debug); 856 857 seq_puts(m, "\tfeatures\n"); 858 seq_printf(m, "\t major_features: 0x%08x\n", 859 gpu->identity.features); 860 seq_printf(m, "\t minor_features0: 0x%08x\n", 861 gpu->identity.minor_features0); 862 seq_printf(m, "\t minor_features1: 0x%08x\n", 863 gpu->identity.minor_features1); 864 seq_printf(m, "\t minor_features2: 0x%08x\n", 865 gpu->identity.minor_features2); 866 seq_printf(m, "\t minor_features3: 0x%08x\n", 867 gpu->identity.minor_features3); 868 seq_printf(m, "\t minor_features4: 0x%08x\n", 869 gpu->identity.minor_features4); 870 seq_printf(m, "\t minor_features5: 0x%08x\n", 871 gpu->identity.minor_features5); 872 seq_printf(m, "\t minor_features6: 0x%08x\n", 873 gpu->identity.minor_features6); 874 seq_printf(m, "\t minor_features7: 0x%08x\n", 875 gpu->identity.minor_features7); 876 seq_printf(m, "\t minor_features8: 0x%08x\n", 877 gpu->identity.minor_features8); 878 seq_printf(m, "\t minor_features9: 0x%08x\n", 879 gpu->identity.minor_features9); 880 seq_printf(m, "\t minor_features10: 0x%08x\n", 881 gpu->identity.minor_features10); 882 seq_printf(m, "\t minor_features11: 0x%08x\n", 883 gpu->identity.minor_features11); 884 885 seq_puts(m, "\tspecs\n"); 886 seq_printf(m, "\t stream_count: %d\n", 887 gpu->identity.stream_count); 888 seq_printf(m, "\t register_max: %d\n", 889 gpu->identity.register_max); 890 seq_printf(m, "\t thread_count: %d\n", 891 gpu->identity.thread_count); 892 seq_printf(m, "\t vertex_cache_size: %d\n", 893 gpu->identity.vertex_cache_size); 894 seq_printf(m, "\t shader_core_count: %d\n", 895 gpu->identity.shader_core_count); 896 seq_printf(m, "\t pixel_pipes: %d\n", 897 gpu->identity.pixel_pipes); 898 seq_printf(m, "\t vertex_output_buffer_size: %d\n", 899 gpu->identity.vertex_output_buffer_size); 900 seq_printf(m, "\t buffer_size: %d\n", 901 gpu->identity.buffer_size); 902 seq_printf(m, "\t instruction_count: %d\n", 903 gpu->identity.instruction_count); 904 seq_printf(m, "\t num_constants: %d\n", 905 gpu->identity.num_constants); 906 seq_printf(m, "\t varyings_count: %d\n", 907 gpu->identity.varyings_count); 908 909 seq_printf(m, "\taxi: 0x%08x\n", axi); 910 seq_printf(m, "\tidle: 0x%08x\n", idle); 911 idle |= ~gpu->idle_mask & ~VIVS_HI_IDLE_STATE_AXI_LP; 912 if ((idle & VIVS_HI_IDLE_STATE_FE) == 0) 913 seq_puts(m, "\t FE is not idle\n"); 914 if ((idle & VIVS_HI_IDLE_STATE_DE) == 0) 915 seq_puts(m, "\t DE is not idle\n"); 916 if ((idle & VIVS_HI_IDLE_STATE_PE) == 0) 917 seq_puts(m, "\t PE is not idle\n"); 918 if ((idle & VIVS_HI_IDLE_STATE_SH) == 0) 919 seq_puts(m, "\t SH is not idle\n"); 920 if ((idle & VIVS_HI_IDLE_STATE_PA) == 0) 921 seq_puts(m, "\t PA is not idle\n"); 922 if ((idle & VIVS_HI_IDLE_STATE_SE) == 0) 923 seq_puts(m, "\t SE is not idle\n"); 924 if ((idle & VIVS_HI_IDLE_STATE_RA) == 0) 925 seq_puts(m, "\t RA is not idle\n"); 926 if ((idle & VIVS_HI_IDLE_STATE_TX) == 0) 927 seq_puts(m, "\t TX is not idle\n"); 928 if ((idle & VIVS_HI_IDLE_STATE_VG) == 0) 929 seq_puts(m, "\t VG is not idle\n"); 930 if ((idle & VIVS_HI_IDLE_STATE_IM) == 0) 931 seq_puts(m, "\t IM is not idle\n"); 932 if ((idle & VIVS_HI_IDLE_STATE_FP) == 0) 933 seq_puts(m, "\t FP is not idle\n"); 934 if ((idle & VIVS_HI_IDLE_STATE_TS) == 0) 935 seq_puts(m, "\t TS is not idle\n"); 936 if (idle & VIVS_HI_IDLE_STATE_AXI_LP) 937 seq_puts(m, "\t AXI low power mode\n"); 938 939 if (gpu->identity.features & chipFeatures_DEBUG_MODE) { 940 u32 read0 = gpu_read(gpu, VIVS_MC_DEBUG_READ0); 941 u32 read1 = gpu_read(gpu, VIVS_MC_DEBUG_READ1); 942 u32 write = gpu_read(gpu, VIVS_MC_DEBUG_WRITE); 943 944 seq_puts(m, "\tMC\n"); 945 seq_printf(m, "\t read0: 0x%08x\n", read0); 946 seq_printf(m, "\t read1: 0x%08x\n", read1); 947 seq_printf(m, "\t write: 0x%08x\n", write); 948 } 949 950 seq_puts(m, "\tDMA "); 951 952 if (debug.address[0] == debug.address[1] && 953 debug.state[0] == debug.state[1]) { 954 seq_puts(m, "seems to be stuck\n"); 955 } else if (debug.address[0] == debug.address[1]) { 956 seq_puts(m, "address is constant\n"); 957 } else { 958 seq_puts(m, "is running\n"); 959 } 960 961 seq_printf(m, "\t address 0: 0x%08x\n", debug.address[0]); 962 seq_printf(m, "\t address 1: 0x%08x\n", debug.address[1]); 963 seq_printf(m, "\t state 0: 0x%08x\n", debug.state[0]); 964 seq_printf(m, "\t state 1: 0x%08x\n", debug.state[1]); 965 seq_printf(m, "\t last fetch 64 bit word: 0x%08x 0x%08x\n", 966 dma_lo, dma_hi); 967 968 ret = 0; 969 970 pm_runtime_mark_last_busy(gpu->dev); 971 pm_runtime_put_autosuspend(gpu->dev); 972 973 return ret; 974 } 975 #endif 976 977 void etnaviv_gpu_recover_hang(struct etnaviv_gpu *gpu) 978 { 979 unsigned long flags; 980 unsigned int i = 0; 981 982 dev_err(gpu->dev, "recover hung GPU!\n"); 983 984 if (pm_runtime_get_sync(gpu->dev) < 0) 985 return; 986 987 mutex_lock(&gpu->lock); 988 989 etnaviv_hw_reset(gpu); 990 991 /* complete all events, the GPU won't do it after the reset */ 992 spin_lock_irqsave(&gpu->event_spinlock, flags); 993 for_each_set_bit_from(i, gpu->event_bitmap, ETNA_NR_EVENTS) 994 complete(&gpu->event_free); 995 bitmap_zero(gpu->event_bitmap, ETNA_NR_EVENTS); 996 spin_unlock_irqrestore(&gpu->event_spinlock, flags); 997 gpu->completed_fence = gpu->active_fence; 998 999 etnaviv_gpu_hw_init(gpu); 1000 gpu->lastctx = NULL; 1001 gpu->exec_state = -1; 1002 1003 mutex_unlock(&gpu->lock); 1004 pm_runtime_mark_last_busy(gpu->dev); 1005 pm_runtime_put_autosuspend(gpu->dev); 1006 } 1007 1008 /* fence object management */ 1009 struct etnaviv_fence { 1010 struct etnaviv_gpu *gpu; 1011 struct dma_fence base; 1012 }; 1013 1014 static inline struct etnaviv_fence *to_etnaviv_fence(struct dma_fence *fence) 1015 { 1016 return container_of(fence, struct etnaviv_fence, base); 1017 } 1018 1019 static const char *etnaviv_fence_get_driver_name(struct dma_fence *fence) 1020 { 1021 return "etnaviv"; 1022 } 1023 1024 static const char *etnaviv_fence_get_timeline_name(struct dma_fence *fence) 1025 { 1026 struct etnaviv_fence *f = to_etnaviv_fence(fence); 1027 1028 return dev_name(f->gpu->dev); 1029 } 1030 1031 static bool etnaviv_fence_signaled(struct dma_fence *fence) 1032 { 1033 struct etnaviv_fence *f = to_etnaviv_fence(fence); 1034 1035 return fence_completed(f->gpu, f->base.seqno); 1036 } 1037 1038 static void etnaviv_fence_release(struct dma_fence *fence) 1039 { 1040 struct etnaviv_fence *f = to_etnaviv_fence(fence); 1041 1042 kfree_rcu(f, base.rcu); 1043 } 1044 1045 static const struct dma_fence_ops etnaviv_fence_ops = { 1046 .get_driver_name = etnaviv_fence_get_driver_name, 1047 .get_timeline_name = etnaviv_fence_get_timeline_name, 1048 .signaled = etnaviv_fence_signaled, 1049 .release = etnaviv_fence_release, 1050 }; 1051 1052 static struct dma_fence *etnaviv_gpu_fence_alloc(struct etnaviv_gpu *gpu) 1053 { 1054 struct etnaviv_fence *f; 1055 1056 /* 1057 * GPU lock must already be held, otherwise fence completion order might 1058 * not match the seqno order assigned here. 1059 */ 1060 lockdep_assert_held(&gpu->lock); 1061 1062 f = kzalloc(sizeof(*f), GFP_KERNEL); 1063 if (!f) 1064 return NULL; 1065 1066 f->gpu = gpu; 1067 1068 dma_fence_init(&f->base, &etnaviv_fence_ops, &gpu->fence_spinlock, 1069 gpu->fence_context, ++gpu->next_fence); 1070 1071 return &f->base; 1072 } 1073 1074 /* 1075 * event management: 1076 */ 1077 1078 static int event_alloc(struct etnaviv_gpu *gpu, unsigned nr_events, 1079 unsigned int *events) 1080 { 1081 unsigned long flags, timeout = msecs_to_jiffies(10 * 10000); 1082 unsigned i, acquired = 0; 1083 1084 for (i = 0; i < nr_events; i++) { 1085 unsigned long ret; 1086 1087 ret = wait_for_completion_timeout(&gpu->event_free, timeout); 1088 1089 if (!ret) { 1090 dev_err(gpu->dev, "wait_for_completion_timeout failed"); 1091 goto out; 1092 } 1093 1094 acquired++; 1095 timeout = ret; 1096 } 1097 1098 spin_lock_irqsave(&gpu->event_spinlock, flags); 1099 1100 for (i = 0; i < nr_events; i++) { 1101 int event = find_first_zero_bit(gpu->event_bitmap, ETNA_NR_EVENTS); 1102 1103 events[i] = event; 1104 memset(&gpu->event[event], 0, sizeof(struct etnaviv_event)); 1105 set_bit(event, gpu->event_bitmap); 1106 } 1107 1108 spin_unlock_irqrestore(&gpu->event_spinlock, flags); 1109 1110 return 0; 1111 1112 out: 1113 for (i = 0; i < acquired; i++) 1114 complete(&gpu->event_free); 1115 1116 return -EBUSY; 1117 } 1118 1119 static void event_free(struct etnaviv_gpu *gpu, unsigned int event) 1120 { 1121 unsigned long flags; 1122 1123 spin_lock_irqsave(&gpu->event_spinlock, flags); 1124 1125 if (!test_bit(event, gpu->event_bitmap)) { 1126 dev_warn(gpu->dev, "event %u is already marked as free", 1127 event); 1128 spin_unlock_irqrestore(&gpu->event_spinlock, flags); 1129 } else { 1130 clear_bit(event, gpu->event_bitmap); 1131 spin_unlock_irqrestore(&gpu->event_spinlock, flags); 1132 1133 complete(&gpu->event_free); 1134 } 1135 } 1136 1137 /* 1138 * Cmdstream submission/retirement: 1139 */ 1140 int etnaviv_gpu_wait_fence_interruptible(struct etnaviv_gpu *gpu, 1141 u32 id, struct timespec *timeout) 1142 { 1143 struct dma_fence *fence; 1144 int ret; 1145 1146 /* 1147 * Look up the fence and take a reference. We might still find a fence 1148 * whose refcount has already dropped to zero. dma_fence_get_rcu 1149 * pretends we didn't find a fence in that case. 1150 */ 1151 rcu_read_lock(); 1152 fence = idr_find(&gpu->fence_idr, id); 1153 if (fence) 1154 fence = dma_fence_get_rcu(fence); 1155 rcu_read_unlock(); 1156 1157 if (!fence) 1158 return 0; 1159 1160 if (!timeout) { 1161 /* No timeout was requested: just test for completion */ 1162 ret = dma_fence_is_signaled(fence) ? 0 : -EBUSY; 1163 } else { 1164 unsigned long remaining = etnaviv_timeout_to_jiffies(timeout); 1165 1166 ret = dma_fence_wait_timeout(fence, true, remaining); 1167 if (ret == 0) 1168 ret = -ETIMEDOUT; 1169 else if (ret != -ERESTARTSYS) 1170 ret = 0; 1171 1172 } 1173 1174 dma_fence_put(fence); 1175 return ret; 1176 } 1177 1178 /* 1179 * Wait for an object to become inactive. This, on it's own, is not race 1180 * free: the object is moved by the scheduler off the active list, and 1181 * then the iova is put. Moreover, the object could be re-submitted just 1182 * after we notice that it's become inactive. 1183 * 1184 * Although the retirement happens under the gpu lock, we don't want to hold 1185 * that lock in this function while waiting. 1186 */ 1187 int etnaviv_gpu_wait_obj_inactive(struct etnaviv_gpu *gpu, 1188 struct etnaviv_gem_object *etnaviv_obj, struct timespec *timeout) 1189 { 1190 unsigned long remaining; 1191 long ret; 1192 1193 if (!timeout) 1194 return !is_active(etnaviv_obj) ? 0 : -EBUSY; 1195 1196 remaining = etnaviv_timeout_to_jiffies(timeout); 1197 1198 ret = wait_event_interruptible_timeout(gpu->fence_event, 1199 !is_active(etnaviv_obj), 1200 remaining); 1201 if (ret > 0) 1202 return 0; 1203 else if (ret == -ERESTARTSYS) 1204 return -ERESTARTSYS; 1205 else 1206 return -ETIMEDOUT; 1207 } 1208 1209 static void sync_point_perfmon_sample(struct etnaviv_gpu *gpu, 1210 struct etnaviv_event *event, unsigned int flags) 1211 { 1212 const struct etnaviv_gem_submit *submit = event->submit; 1213 unsigned int i; 1214 1215 for (i = 0; i < submit->nr_pmrs; i++) { 1216 const struct etnaviv_perfmon_request *pmr = submit->pmrs + i; 1217 1218 if (pmr->flags == flags) 1219 etnaviv_perfmon_process(gpu, pmr, submit->exec_state); 1220 } 1221 } 1222 1223 static void sync_point_perfmon_sample_pre(struct etnaviv_gpu *gpu, 1224 struct etnaviv_event *event) 1225 { 1226 u32 val; 1227 1228 /* disable clock gating */ 1229 val = gpu_read(gpu, VIVS_PM_POWER_CONTROLS); 1230 val &= ~VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING; 1231 gpu_write(gpu, VIVS_PM_POWER_CONTROLS, val); 1232 1233 /* enable debug register */ 1234 val = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); 1235 val &= ~VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS; 1236 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, val); 1237 1238 sync_point_perfmon_sample(gpu, event, ETNA_PM_PROCESS_PRE); 1239 } 1240 1241 static void sync_point_perfmon_sample_post(struct etnaviv_gpu *gpu, 1242 struct etnaviv_event *event) 1243 { 1244 const struct etnaviv_gem_submit *submit = event->submit; 1245 unsigned int i; 1246 u32 val; 1247 1248 sync_point_perfmon_sample(gpu, event, ETNA_PM_PROCESS_POST); 1249 1250 for (i = 0; i < submit->nr_pmrs; i++) { 1251 const struct etnaviv_perfmon_request *pmr = submit->pmrs + i; 1252 1253 *pmr->bo_vma = pmr->sequence; 1254 } 1255 1256 /* disable debug register */ 1257 val = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); 1258 val |= VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS; 1259 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, val); 1260 1261 /* enable clock gating */ 1262 val = gpu_read(gpu, VIVS_PM_POWER_CONTROLS); 1263 val |= VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING; 1264 gpu_write(gpu, VIVS_PM_POWER_CONTROLS, val); 1265 } 1266 1267 1268 /* add bo's to gpu's ring, and kick gpu: */ 1269 struct dma_fence *etnaviv_gpu_submit(struct etnaviv_gem_submit *submit) 1270 { 1271 struct etnaviv_gpu *gpu = submit->gpu; 1272 struct dma_fence *gpu_fence; 1273 unsigned int i, nr_events = 1, event[3]; 1274 int ret; 1275 1276 if (!submit->runtime_resumed) { 1277 ret = pm_runtime_get_sync(gpu->dev); 1278 if (ret < 0) 1279 return NULL; 1280 submit->runtime_resumed = true; 1281 } 1282 1283 /* 1284 * if there are performance monitor requests we need to have 1285 * - a sync point to re-configure gpu and process ETNA_PM_PROCESS_PRE 1286 * requests. 1287 * - a sync point to re-configure gpu, process ETNA_PM_PROCESS_POST requests 1288 * and update the sequence number for userspace. 1289 */ 1290 if (submit->nr_pmrs) 1291 nr_events = 3; 1292 1293 ret = event_alloc(gpu, nr_events, event); 1294 if (ret) { 1295 DRM_ERROR("no free events\n"); 1296 return NULL; 1297 } 1298 1299 mutex_lock(&gpu->lock); 1300 1301 gpu_fence = etnaviv_gpu_fence_alloc(gpu); 1302 if (!gpu_fence) { 1303 for (i = 0; i < nr_events; i++) 1304 event_free(gpu, event[i]); 1305 1306 goto out_unlock; 1307 } 1308 1309 gpu->active_fence = gpu_fence->seqno; 1310 1311 if (submit->nr_pmrs) { 1312 gpu->event[event[1]].sync_point = &sync_point_perfmon_sample_pre; 1313 kref_get(&submit->refcount); 1314 gpu->event[event[1]].submit = submit; 1315 etnaviv_sync_point_queue(gpu, event[1]); 1316 } 1317 1318 gpu->event[event[0]].fence = gpu_fence; 1319 submit->cmdbuf.user_size = submit->cmdbuf.size - 8; 1320 etnaviv_buffer_queue(gpu, submit->exec_state, event[0], 1321 &submit->cmdbuf); 1322 1323 if (submit->nr_pmrs) { 1324 gpu->event[event[2]].sync_point = &sync_point_perfmon_sample_post; 1325 kref_get(&submit->refcount); 1326 gpu->event[event[2]].submit = submit; 1327 etnaviv_sync_point_queue(gpu, event[2]); 1328 } 1329 1330 out_unlock: 1331 mutex_unlock(&gpu->lock); 1332 1333 return gpu_fence; 1334 } 1335 1336 static void sync_point_worker(struct work_struct *work) 1337 { 1338 struct etnaviv_gpu *gpu = container_of(work, struct etnaviv_gpu, 1339 sync_point_work); 1340 struct etnaviv_event *event = &gpu->event[gpu->sync_point_event]; 1341 u32 addr = gpu_read(gpu, VIVS_FE_DMA_ADDRESS); 1342 1343 event->sync_point(gpu, event); 1344 etnaviv_submit_put(event->submit); 1345 event_free(gpu, gpu->sync_point_event); 1346 1347 /* restart FE last to avoid GPU and IRQ racing against this worker */ 1348 etnaviv_gpu_start_fe(gpu, addr + 2, 2); 1349 } 1350 1351 static void dump_mmu_fault(struct etnaviv_gpu *gpu) 1352 { 1353 u32 status_reg, status; 1354 int i; 1355 1356 if (gpu->sec_mode == ETNA_SEC_NONE) 1357 status_reg = VIVS_MMUv2_STATUS; 1358 else 1359 status_reg = VIVS_MMUv2_SEC_STATUS; 1360 1361 status = gpu_read(gpu, status_reg); 1362 dev_err_ratelimited(gpu->dev, "MMU fault status 0x%08x\n", status); 1363 1364 for (i = 0; i < 4; i++) { 1365 u32 address_reg; 1366 1367 if (!(status & (VIVS_MMUv2_STATUS_EXCEPTION0__MASK << (i * 4)))) 1368 continue; 1369 1370 if (gpu->sec_mode == ETNA_SEC_NONE) 1371 address_reg = VIVS_MMUv2_EXCEPTION_ADDR(i); 1372 else 1373 address_reg = VIVS_MMUv2_SEC_EXCEPTION_ADDR; 1374 1375 dev_err_ratelimited(gpu->dev, "MMU %d fault addr 0x%08x\n", i, 1376 gpu_read(gpu, address_reg)); 1377 } 1378 } 1379 1380 static irqreturn_t irq_handler(int irq, void *data) 1381 { 1382 struct etnaviv_gpu *gpu = data; 1383 irqreturn_t ret = IRQ_NONE; 1384 1385 u32 intr = gpu_read(gpu, VIVS_HI_INTR_ACKNOWLEDGE); 1386 1387 if (intr != 0) { 1388 int event; 1389 1390 pm_runtime_mark_last_busy(gpu->dev); 1391 1392 dev_dbg(gpu->dev, "intr 0x%08x\n", intr); 1393 1394 if (intr & VIVS_HI_INTR_ACKNOWLEDGE_AXI_BUS_ERROR) { 1395 dev_err(gpu->dev, "AXI bus error\n"); 1396 intr &= ~VIVS_HI_INTR_ACKNOWLEDGE_AXI_BUS_ERROR; 1397 } 1398 1399 if (intr & VIVS_HI_INTR_ACKNOWLEDGE_MMU_EXCEPTION) { 1400 dump_mmu_fault(gpu); 1401 intr &= ~VIVS_HI_INTR_ACKNOWLEDGE_MMU_EXCEPTION; 1402 } 1403 1404 while ((event = ffs(intr)) != 0) { 1405 struct dma_fence *fence; 1406 1407 event -= 1; 1408 1409 intr &= ~(1 << event); 1410 1411 dev_dbg(gpu->dev, "event %u\n", event); 1412 1413 if (gpu->event[event].sync_point) { 1414 gpu->sync_point_event = event; 1415 queue_work(gpu->wq, &gpu->sync_point_work); 1416 } 1417 1418 fence = gpu->event[event].fence; 1419 if (!fence) 1420 continue; 1421 1422 gpu->event[event].fence = NULL; 1423 1424 /* 1425 * Events can be processed out of order. Eg, 1426 * - allocate and queue event 0 1427 * - allocate event 1 1428 * - event 0 completes, we process it 1429 * - allocate and queue event 0 1430 * - event 1 and event 0 complete 1431 * we can end up processing event 0 first, then 1. 1432 */ 1433 if (fence_after(fence->seqno, gpu->completed_fence)) 1434 gpu->completed_fence = fence->seqno; 1435 dma_fence_signal(fence); 1436 1437 event_free(gpu, event); 1438 } 1439 1440 ret = IRQ_HANDLED; 1441 } 1442 1443 return ret; 1444 } 1445 1446 static int etnaviv_gpu_clk_enable(struct etnaviv_gpu *gpu) 1447 { 1448 int ret; 1449 1450 if (gpu->clk_reg) { 1451 ret = clk_prepare_enable(gpu->clk_reg); 1452 if (ret) 1453 return ret; 1454 } 1455 1456 if (gpu->clk_bus) { 1457 ret = clk_prepare_enable(gpu->clk_bus); 1458 if (ret) 1459 return ret; 1460 } 1461 1462 if (gpu->clk_core) { 1463 ret = clk_prepare_enable(gpu->clk_core); 1464 if (ret) 1465 goto disable_clk_bus; 1466 } 1467 1468 if (gpu->clk_shader) { 1469 ret = clk_prepare_enable(gpu->clk_shader); 1470 if (ret) 1471 goto disable_clk_core; 1472 } 1473 1474 return 0; 1475 1476 disable_clk_core: 1477 if (gpu->clk_core) 1478 clk_disable_unprepare(gpu->clk_core); 1479 disable_clk_bus: 1480 if (gpu->clk_bus) 1481 clk_disable_unprepare(gpu->clk_bus); 1482 1483 return ret; 1484 } 1485 1486 static int etnaviv_gpu_clk_disable(struct etnaviv_gpu *gpu) 1487 { 1488 if (gpu->clk_shader) 1489 clk_disable_unprepare(gpu->clk_shader); 1490 if (gpu->clk_core) 1491 clk_disable_unprepare(gpu->clk_core); 1492 if (gpu->clk_bus) 1493 clk_disable_unprepare(gpu->clk_bus); 1494 if (gpu->clk_reg) 1495 clk_disable_unprepare(gpu->clk_reg); 1496 1497 return 0; 1498 } 1499 1500 int etnaviv_gpu_wait_idle(struct etnaviv_gpu *gpu, unsigned int timeout_ms) 1501 { 1502 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms); 1503 1504 do { 1505 u32 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); 1506 1507 if ((idle & gpu->idle_mask) == gpu->idle_mask) 1508 return 0; 1509 1510 if (time_is_before_jiffies(timeout)) { 1511 dev_warn(gpu->dev, 1512 "timed out waiting for idle: idle=0x%x\n", 1513 idle); 1514 return -ETIMEDOUT; 1515 } 1516 1517 udelay(5); 1518 } while (1); 1519 } 1520 1521 static int etnaviv_gpu_hw_suspend(struct etnaviv_gpu *gpu) 1522 { 1523 if (gpu->buffer.suballoc) { 1524 /* Replace the last WAIT with END */ 1525 mutex_lock(&gpu->lock); 1526 etnaviv_buffer_end(gpu); 1527 mutex_unlock(&gpu->lock); 1528 1529 /* 1530 * We know that only the FE is busy here, this should 1531 * happen quickly (as the WAIT is only 200 cycles). If 1532 * we fail, just warn and continue. 1533 */ 1534 etnaviv_gpu_wait_idle(gpu, 100); 1535 } 1536 1537 return etnaviv_gpu_clk_disable(gpu); 1538 } 1539 1540 #ifdef CONFIG_PM 1541 static int etnaviv_gpu_hw_resume(struct etnaviv_gpu *gpu) 1542 { 1543 int ret; 1544 1545 ret = mutex_lock_killable(&gpu->lock); 1546 if (ret) 1547 return ret; 1548 1549 etnaviv_gpu_update_clock(gpu); 1550 etnaviv_gpu_hw_init(gpu); 1551 1552 gpu->lastctx = NULL; 1553 gpu->exec_state = -1; 1554 1555 mutex_unlock(&gpu->lock); 1556 1557 return 0; 1558 } 1559 #endif 1560 1561 static int 1562 etnaviv_gpu_cooling_get_max_state(struct thermal_cooling_device *cdev, 1563 unsigned long *state) 1564 { 1565 *state = 6; 1566 1567 return 0; 1568 } 1569 1570 static int 1571 etnaviv_gpu_cooling_get_cur_state(struct thermal_cooling_device *cdev, 1572 unsigned long *state) 1573 { 1574 struct etnaviv_gpu *gpu = cdev->devdata; 1575 1576 *state = gpu->freq_scale; 1577 1578 return 0; 1579 } 1580 1581 static int 1582 etnaviv_gpu_cooling_set_cur_state(struct thermal_cooling_device *cdev, 1583 unsigned long state) 1584 { 1585 struct etnaviv_gpu *gpu = cdev->devdata; 1586 1587 mutex_lock(&gpu->lock); 1588 gpu->freq_scale = state; 1589 if (!pm_runtime_suspended(gpu->dev)) 1590 etnaviv_gpu_update_clock(gpu); 1591 mutex_unlock(&gpu->lock); 1592 1593 return 0; 1594 } 1595 1596 static struct thermal_cooling_device_ops cooling_ops = { 1597 .get_max_state = etnaviv_gpu_cooling_get_max_state, 1598 .get_cur_state = etnaviv_gpu_cooling_get_cur_state, 1599 .set_cur_state = etnaviv_gpu_cooling_set_cur_state, 1600 }; 1601 1602 static int etnaviv_gpu_bind(struct device *dev, struct device *master, 1603 void *data) 1604 { 1605 struct drm_device *drm = data; 1606 struct etnaviv_drm_private *priv = drm->dev_private; 1607 struct etnaviv_gpu *gpu = dev_get_drvdata(dev); 1608 int ret; 1609 1610 if (IS_ENABLED(CONFIG_DRM_ETNAVIV_THERMAL)) { 1611 gpu->cooling = thermal_of_cooling_device_register(dev->of_node, 1612 (char *)dev_name(dev), gpu, &cooling_ops); 1613 if (IS_ERR(gpu->cooling)) 1614 return PTR_ERR(gpu->cooling); 1615 } 1616 1617 gpu->wq = alloc_ordered_workqueue(dev_name(dev), 0); 1618 if (!gpu->wq) { 1619 ret = -ENOMEM; 1620 goto out_thermal; 1621 } 1622 1623 ret = etnaviv_sched_init(gpu); 1624 if (ret) 1625 goto out_workqueue; 1626 1627 #ifdef CONFIG_PM 1628 ret = pm_runtime_get_sync(gpu->dev); 1629 #else 1630 ret = etnaviv_gpu_clk_enable(gpu); 1631 #endif 1632 if (ret < 0) 1633 goto out_sched; 1634 1635 1636 gpu->drm = drm; 1637 gpu->fence_context = dma_fence_context_alloc(1); 1638 idr_init(&gpu->fence_idr); 1639 spin_lock_init(&gpu->fence_spinlock); 1640 1641 INIT_WORK(&gpu->sync_point_work, sync_point_worker); 1642 init_waitqueue_head(&gpu->fence_event); 1643 1644 priv->gpu[priv->num_gpus++] = gpu; 1645 1646 pm_runtime_mark_last_busy(gpu->dev); 1647 pm_runtime_put_autosuspend(gpu->dev); 1648 1649 return 0; 1650 1651 out_sched: 1652 etnaviv_sched_fini(gpu); 1653 1654 out_workqueue: 1655 destroy_workqueue(gpu->wq); 1656 1657 out_thermal: 1658 if (IS_ENABLED(CONFIG_DRM_ETNAVIV_THERMAL)) 1659 thermal_cooling_device_unregister(gpu->cooling); 1660 1661 return ret; 1662 } 1663 1664 static void etnaviv_gpu_unbind(struct device *dev, struct device *master, 1665 void *data) 1666 { 1667 struct etnaviv_gpu *gpu = dev_get_drvdata(dev); 1668 1669 DBG("%s", dev_name(gpu->dev)); 1670 1671 flush_workqueue(gpu->wq); 1672 destroy_workqueue(gpu->wq); 1673 1674 etnaviv_sched_fini(gpu); 1675 1676 #ifdef CONFIG_PM 1677 pm_runtime_get_sync(gpu->dev); 1678 pm_runtime_put_sync_suspend(gpu->dev); 1679 #else 1680 etnaviv_gpu_hw_suspend(gpu); 1681 #endif 1682 1683 if (gpu->buffer.suballoc) 1684 etnaviv_cmdbuf_free(&gpu->buffer); 1685 1686 if (gpu->cmdbuf_suballoc) { 1687 etnaviv_cmdbuf_suballoc_destroy(gpu->cmdbuf_suballoc); 1688 gpu->cmdbuf_suballoc = NULL; 1689 } 1690 1691 if (gpu->mmu) { 1692 etnaviv_iommu_destroy(gpu->mmu); 1693 gpu->mmu = NULL; 1694 } 1695 1696 gpu->drm = NULL; 1697 idr_destroy(&gpu->fence_idr); 1698 1699 if (IS_ENABLED(CONFIG_DRM_ETNAVIV_THERMAL)) 1700 thermal_cooling_device_unregister(gpu->cooling); 1701 gpu->cooling = NULL; 1702 } 1703 1704 static const struct component_ops gpu_ops = { 1705 .bind = etnaviv_gpu_bind, 1706 .unbind = etnaviv_gpu_unbind, 1707 }; 1708 1709 static const struct of_device_id etnaviv_gpu_match[] = { 1710 { 1711 .compatible = "vivante,gc" 1712 }, 1713 { /* sentinel */ } 1714 }; 1715 MODULE_DEVICE_TABLE(of, etnaviv_gpu_match); 1716 1717 static int etnaviv_gpu_platform_probe(struct platform_device *pdev) 1718 { 1719 struct device *dev = &pdev->dev; 1720 struct etnaviv_gpu *gpu; 1721 struct resource *res; 1722 int err; 1723 1724 gpu = devm_kzalloc(dev, sizeof(*gpu), GFP_KERNEL); 1725 if (!gpu) 1726 return -ENOMEM; 1727 1728 gpu->dev = &pdev->dev; 1729 mutex_init(&gpu->lock); 1730 mutex_init(&gpu->fence_lock); 1731 1732 /* Map registers: */ 1733 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1734 gpu->mmio = devm_ioremap_resource(&pdev->dev, res); 1735 if (IS_ERR(gpu->mmio)) 1736 return PTR_ERR(gpu->mmio); 1737 1738 /* Get Interrupt: */ 1739 gpu->irq = platform_get_irq(pdev, 0); 1740 if (gpu->irq < 0) { 1741 dev_err(dev, "failed to get irq: %d\n", gpu->irq); 1742 return gpu->irq; 1743 } 1744 1745 err = devm_request_irq(&pdev->dev, gpu->irq, irq_handler, 0, 1746 dev_name(gpu->dev), gpu); 1747 if (err) { 1748 dev_err(dev, "failed to request IRQ%u: %d\n", gpu->irq, err); 1749 return err; 1750 } 1751 1752 /* Get Clocks: */ 1753 gpu->clk_reg = devm_clk_get(&pdev->dev, "reg"); 1754 DBG("clk_reg: %p", gpu->clk_reg); 1755 if (IS_ERR(gpu->clk_reg)) 1756 gpu->clk_reg = NULL; 1757 1758 gpu->clk_bus = devm_clk_get(&pdev->dev, "bus"); 1759 DBG("clk_bus: %p", gpu->clk_bus); 1760 if (IS_ERR(gpu->clk_bus)) 1761 gpu->clk_bus = NULL; 1762 1763 gpu->clk_core = devm_clk_get(&pdev->dev, "core"); 1764 DBG("clk_core: %p", gpu->clk_core); 1765 if (IS_ERR(gpu->clk_core)) 1766 gpu->clk_core = NULL; 1767 gpu->base_rate_core = clk_get_rate(gpu->clk_core); 1768 1769 gpu->clk_shader = devm_clk_get(&pdev->dev, "shader"); 1770 DBG("clk_shader: %p", gpu->clk_shader); 1771 if (IS_ERR(gpu->clk_shader)) 1772 gpu->clk_shader = NULL; 1773 gpu->base_rate_shader = clk_get_rate(gpu->clk_shader); 1774 1775 /* TODO: figure out max mapped size */ 1776 dev_set_drvdata(dev, gpu); 1777 1778 /* 1779 * We treat the device as initially suspended. The runtime PM 1780 * autosuspend delay is rather arbitary: no measurements have 1781 * yet been performed to determine an appropriate value. 1782 */ 1783 pm_runtime_use_autosuspend(gpu->dev); 1784 pm_runtime_set_autosuspend_delay(gpu->dev, 200); 1785 pm_runtime_enable(gpu->dev); 1786 1787 err = component_add(&pdev->dev, &gpu_ops); 1788 if (err < 0) { 1789 dev_err(&pdev->dev, "failed to register component: %d\n", err); 1790 return err; 1791 } 1792 1793 return 0; 1794 } 1795 1796 static int etnaviv_gpu_platform_remove(struct platform_device *pdev) 1797 { 1798 component_del(&pdev->dev, &gpu_ops); 1799 pm_runtime_disable(&pdev->dev); 1800 return 0; 1801 } 1802 1803 #ifdef CONFIG_PM 1804 static int etnaviv_gpu_rpm_suspend(struct device *dev) 1805 { 1806 struct etnaviv_gpu *gpu = dev_get_drvdata(dev); 1807 u32 idle, mask; 1808 1809 /* If we have outstanding fences, we're not idle */ 1810 if (gpu->completed_fence != gpu->active_fence) 1811 return -EBUSY; 1812 1813 /* Check whether the hardware (except FE) is idle */ 1814 mask = gpu->idle_mask & ~VIVS_HI_IDLE_STATE_FE; 1815 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE) & mask; 1816 if (idle != mask) 1817 return -EBUSY; 1818 1819 return etnaviv_gpu_hw_suspend(gpu); 1820 } 1821 1822 static int etnaviv_gpu_rpm_resume(struct device *dev) 1823 { 1824 struct etnaviv_gpu *gpu = dev_get_drvdata(dev); 1825 int ret; 1826 1827 ret = etnaviv_gpu_clk_enable(gpu); 1828 if (ret) 1829 return ret; 1830 1831 /* Re-initialise the basic hardware state */ 1832 if (gpu->drm && gpu->buffer.suballoc) { 1833 ret = etnaviv_gpu_hw_resume(gpu); 1834 if (ret) { 1835 etnaviv_gpu_clk_disable(gpu); 1836 return ret; 1837 } 1838 } 1839 1840 return 0; 1841 } 1842 #endif 1843 1844 static const struct dev_pm_ops etnaviv_gpu_pm_ops = { 1845 SET_RUNTIME_PM_OPS(etnaviv_gpu_rpm_suspend, etnaviv_gpu_rpm_resume, 1846 NULL) 1847 }; 1848 1849 struct platform_driver etnaviv_gpu_driver = { 1850 .driver = { 1851 .name = "etnaviv-gpu", 1852 .owner = THIS_MODULE, 1853 .pm = &etnaviv_gpu_pm_ops, 1854 .of_match_table = etnaviv_gpu_match, 1855 }, 1856 .probe = etnaviv_gpu_platform_probe, 1857 .remove = etnaviv_gpu_platform_remove, 1858 .id_table = gpu_ids, 1859 }; 1860