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 #ifndef PHYS_OFFSET 31 #define PHYS_OFFSET 0 32 #endif 33 34 static const struct platform_device_id gpu_ids[] = { 35 { .name = "etnaviv-gpu,2d" }, 36 { }, 37 }; 38 39 /* 40 * Driver functions: 41 */ 42 43 int etnaviv_gpu_get_param(struct etnaviv_gpu *gpu, u32 param, u64 *value) 44 { 45 struct etnaviv_drm_private *priv = gpu->drm->dev_private; 46 47 switch (param) { 48 case ETNAVIV_PARAM_GPU_MODEL: 49 *value = gpu->identity.model; 50 break; 51 52 case ETNAVIV_PARAM_GPU_REVISION: 53 *value = gpu->identity.revision; 54 break; 55 56 case ETNAVIV_PARAM_GPU_FEATURES_0: 57 *value = gpu->identity.features; 58 break; 59 60 case ETNAVIV_PARAM_GPU_FEATURES_1: 61 *value = gpu->identity.minor_features0; 62 break; 63 64 case ETNAVIV_PARAM_GPU_FEATURES_2: 65 *value = gpu->identity.minor_features1; 66 break; 67 68 case ETNAVIV_PARAM_GPU_FEATURES_3: 69 *value = gpu->identity.minor_features2; 70 break; 71 72 case ETNAVIV_PARAM_GPU_FEATURES_4: 73 *value = gpu->identity.minor_features3; 74 break; 75 76 case ETNAVIV_PARAM_GPU_FEATURES_5: 77 *value = gpu->identity.minor_features4; 78 break; 79 80 case ETNAVIV_PARAM_GPU_FEATURES_6: 81 *value = gpu->identity.minor_features5; 82 break; 83 84 case ETNAVIV_PARAM_GPU_FEATURES_7: 85 *value = gpu->identity.minor_features6; 86 break; 87 88 case ETNAVIV_PARAM_GPU_FEATURES_8: 89 *value = gpu->identity.minor_features7; 90 break; 91 92 case ETNAVIV_PARAM_GPU_FEATURES_9: 93 *value = gpu->identity.minor_features8; 94 break; 95 96 case ETNAVIV_PARAM_GPU_FEATURES_10: 97 *value = gpu->identity.minor_features9; 98 break; 99 100 case ETNAVIV_PARAM_GPU_FEATURES_11: 101 *value = gpu->identity.minor_features10; 102 break; 103 104 case ETNAVIV_PARAM_GPU_FEATURES_12: 105 *value = gpu->identity.minor_features11; 106 break; 107 108 case ETNAVIV_PARAM_GPU_STREAM_COUNT: 109 *value = gpu->identity.stream_count; 110 break; 111 112 case ETNAVIV_PARAM_GPU_REGISTER_MAX: 113 *value = gpu->identity.register_max; 114 break; 115 116 case ETNAVIV_PARAM_GPU_THREAD_COUNT: 117 *value = gpu->identity.thread_count; 118 break; 119 120 case ETNAVIV_PARAM_GPU_VERTEX_CACHE_SIZE: 121 *value = gpu->identity.vertex_cache_size; 122 break; 123 124 case ETNAVIV_PARAM_GPU_SHADER_CORE_COUNT: 125 *value = gpu->identity.shader_core_count; 126 break; 127 128 case ETNAVIV_PARAM_GPU_PIXEL_PIPES: 129 *value = gpu->identity.pixel_pipes; 130 break; 131 132 case ETNAVIV_PARAM_GPU_VERTEX_OUTPUT_BUFFER_SIZE: 133 *value = gpu->identity.vertex_output_buffer_size; 134 break; 135 136 case ETNAVIV_PARAM_GPU_BUFFER_SIZE: 137 *value = gpu->identity.buffer_size; 138 break; 139 140 case ETNAVIV_PARAM_GPU_INSTRUCTION_COUNT: 141 *value = gpu->identity.instruction_count; 142 break; 143 144 case ETNAVIV_PARAM_GPU_NUM_CONSTANTS: 145 *value = gpu->identity.num_constants; 146 break; 147 148 case ETNAVIV_PARAM_GPU_NUM_VARYINGS: 149 *value = gpu->identity.varyings_count; 150 break; 151 152 case ETNAVIV_PARAM_SOFTPIN_START_ADDR: 153 if (priv->mmu_global->version == ETNAVIV_IOMMU_V2) 154 *value = ETNAVIV_SOFTPIN_START_ADDRESS; 155 else 156 *value = ~0ULL; 157 break; 158 159 default: 160 DBG("%s: invalid param: %u", dev_name(gpu->dev), param); 161 return -EINVAL; 162 } 163 164 return 0; 165 } 166 167 168 #define etnaviv_is_model_rev(gpu, mod, rev) \ 169 ((gpu)->identity.model == chipModel_##mod && \ 170 (gpu)->identity.revision == rev) 171 #define etnaviv_field(val, field) \ 172 (((val) & field##__MASK) >> field##__SHIFT) 173 174 static void etnaviv_hw_specs(struct etnaviv_gpu *gpu) 175 { 176 if (gpu->identity.minor_features0 & 177 chipMinorFeatures0_MORE_MINOR_FEATURES) { 178 u32 specs[4]; 179 unsigned int streams; 180 181 specs[0] = gpu_read(gpu, VIVS_HI_CHIP_SPECS); 182 specs[1] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_2); 183 specs[2] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_3); 184 specs[3] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_4); 185 186 gpu->identity.stream_count = etnaviv_field(specs[0], 187 VIVS_HI_CHIP_SPECS_STREAM_COUNT); 188 gpu->identity.register_max = etnaviv_field(specs[0], 189 VIVS_HI_CHIP_SPECS_REGISTER_MAX); 190 gpu->identity.thread_count = etnaviv_field(specs[0], 191 VIVS_HI_CHIP_SPECS_THREAD_COUNT); 192 gpu->identity.vertex_cache_size = etnaviv_field(specs[0], 193 VIVS_HI_CHIP_SPECS_VERTEX_CACHE_SIZE); 194 gpu->identity.shader_core_count = etnaviv_field(specs[0], 195 VIVS_HI_CHIP_SPECS_SHADER_CORE_COUNT); 196 gpu->identity.pixel_pipes = etnaviv_field(specs[0], 197 VIVS_HI_CHIP_SPECS_PIXEL_PIPES); 198 gpu->identity.vertex_output_buffer_size = 199 etnaviv_field(specs[0], 200 VIVS_HI_CHIP_SPECS_VERTEX_OUTPUT_BUFFER_SIZE); 201 202 gpu->identity.buffer_size = etnaviv_field(specs[1], 203 VIVS_HI_CHIP_SPECS_2_BUFFER_SIZE); 204 gpu->identity.instruction_count = etnaviv_field(specs[1], 205 VIVS_HI_CHIP_SPECS_2_INSTRUCTION_COUNT); 206 gpu->identity.num_constants = etnaviv_field(specs[1], 207 VIVS_HI_CHIP_SPECS_2_NUM_CONSTANTS); 208 209 gpu->identity.varyings_count = etnaviv_field(specs[2], 210 VIVS_HI_CHIP_SPECS_3_VARYINGS_COUNT); 211 212 /* This overrides the value from older register if non-zero */ 213 streams = etnaviv_field(specs[3], 214 VIVS_HI_CHIP_SPECS_4_STREAM_COUNT); 215 if (streams) 216 gpu->identity.stream_count = streams; 217 } 218 219 /* Fill in the stream count if not specified */ 220 if (gpu->identity.stream_count == 0) { 221 if (gpu->identity.model >= 0x1000) 222 gpu->identity.stream_count = 4; 223 else 224 gpu->identity.stream_count = 1; 225 } 226 227 /* Convert the register max value */ 228 if (gpu->identity.register_max) 229 gpu->identity.register_max = 1 << gpu->identity.register_max; 230 else if (gpu->identity.model == chipModel_GC400) 231 gpu->identity.register_max = 32; 232 else 233 gpu->identity.register_max = 64; 234 235 /* Convert thread count */ 236 if (gpu->identity.thread_count) 237 gpu->identity.thread_count = 1 << gpu->identity.thread_count; 238 else if (gpu->identity.model == chipModel_GC400) 239 gpu->identity.thread_count = 64; 240 else if (gpu->identity.model == chipModel_GC500 || 241 gpu->identity.model == chipModel_GC530) 242 gpu->identity.thread_count = 128; 243 else 244 gpu->identity.thread_count = 256; 245 246 if (gpu->identity.vertex_cache_size == 0) 247 gpu->identity.vertex_cache_size = 8; 248 249 if (gpu->identity.shader_core_count == 0) { 250 if (gpu->identity.model >= 0x1000) 251 gpu->identity.shader_core_count = 2; 252 else 253 gpu->identity.shader_core_count = 1; 254 } 255 256 if (gpu->identity.pixel_pipes == 0) 257 gpu->identity.pixel_pipes = 1; 258 259 /* Convert virtex buffer size */ 260 if (gpu->identity.vertex_output_buffer_size) { 261 gpu->identity.vertex_output_buffer_size = 262 1 << gpu->identity.vertex_output_buffer_size; 263 } else if (gpu->identity.model == chipModel_GC400) { 264 if (gpu->identity.revision < 0x4000) 265 gpu->identity.vertex_output_buffer_size = 512; 266 else if (gpu->identity.revision < 0x4200) 267 gpu->identity.vertex_output_buffer_size = 256; 268 else 269 gpu->identity.vertex_output_buffer_size = 128; 270 } else { 271 gpu->identity.vertex_output_buffer_size = 512; 272 } 273 274 switch (gpu->identity.instruction_count) { 275 case 0: 276 if (etnaviv_is_model_rev(gpu, GC2000, 0x5108) || 277 gpu->identity.model == chipModel_GC880) 278 gpu->identity.instruction_count = 512; 279 else 280 gpu->identity.instruction_count = 256; 281 break; 282 283 case 1: 284 gpu->identity.instruction_count = 1024; 285 break; 286 287 case 2: 288 gpu->identity.instruction_count = 2048; 289 break; 290 291 default: 292 gpu->identity.instruction_count = 256; 293 break; 294 } 295 296 if (gpu->identity.num_constants == 0) 297 gpu->identity.num_constants = 168; 298 299 if (gpu->identity.varyings_count == 0) { 300 if (gpu->identity.minor_features1 & chipMinorFeatures1_HALTI0) 301 gpu->identity.varyings_count = 12; 302 else 303 gpu->identity.varyings_count = 8; 304 } 305 306 /* 307 * For some cores, two varyings are consumed for position, so the 308 * maximum varying count needs to be reduced by one. 309 */ 310 if (etnaviv_is_model_rev(gpu, GC5000, 0x5434) || 311 etnaviv_is_model_rev(gpu, GC4000, 0x5222) || 312 etnaviv_is_model_rev(gpu, GC4000, 0x5245) || 313 etnaviv_is_model_rev(gpu, GC4000, 0x5208) || 314 etnaviv_is_model_rev(gpu, GC3000, 0x5435) || 315 etnaviv_is_model_rev(gpu, GC2200, 0x5244) || 316 etnaviv_is_model_rev(gpu, GC2100, 0x5108) || 317 etnaviv_is_model_rev(gpu, GC2000, 0x5108) || 318 etnaviv_is_model_rev(gpu, GC1500, 0x5246) || 319 etnaviv_is_model_rev(gpu, GC880, 0x5107) || 320 etnaviv_is_model_rev(gpu, GC880, 0x5106)) 321 gpu->identity.varyings_count -= 1; 322 } 323 324 static void etnaviv_hw_identify(struct etnaviv_gpu *gpu) 325 { 326 u32 chipIdentity; 327 328 chipIdentity = gpu_read(gpu, VIVS_HI_CHIP_IDENTITY); 329 330 /* Special case for older graphic cores. */ 331 if (etnaviv_field(chipIdentity, VIVS_HI_CHIP_IDENTITY_FAMILY) == 0x01) { 332 gpu->identity.model = chipModel_GC500; 333 gpu->identity.revision = etnaviv_field(chipIdentity, 334 VIVS_HI_CHIP_IDENTITY_REVISION); 335 } else { 336 337 gpu->identity.model = gpu_read(gpu, VIVS_HI_CHIP_MODEL); 338 gpu->identity.revision = gpu_read(gpu, VIVS_HI_CHIP_REV); 339 340 /* 341 * !!!! HACK ALERT !!!! 342 * Because people change device IDs without letting software 343 * know about it - here is the hack to make it all look the 344 * same. Only for GC400 family. 345 */ 346 if ((gpu->identity.model & 0xff00) == 0x0400 && 347 gpu->identity.model != chipModel_GC420) { 348 gpu->identity.model = gpu->identity.model & 0x0400; 349 } 350 351 /* Another special case */ 352 if (etnaviv_is_model_rev(gpu, GC300, 0x2201)) { 353 u32 chipDate = gpu_read(gpu, VIVS_HI_CHIP_DATE); 354 u32 chipTime = gpu_read(gpu, VIVS_HI_CHIP_TIME); 355 356 if (chipDate == 0x20080814 && chipTime == 0x12051100) { 357 /* 358 * This IP has an ECO; put the correct 359 * revision in it. 360 */ 361 gpu->identity.revision = 0x1051; 362 } 363 } 364 365 /* 366 * NXP likes to call the GPU on the i.MX6QP GC2000+, but in 367 * reality it's just a re-branded GC3000. We can identify this 368 * core by the upper half of the revision register being all 1. 369 * Fix model/rev here, so all other places can refer to this 370 * core by its real identity. 371 */ 372 if (etnaviv_is_model_rev(gpu, GC2000, 0xffff5450)) { 373 gpu->identity.model = chipModel_GC3000; 374 gpu->identity.revision &= 0xffff; 375 } 376 } 377 378 dev_info(gpu->dev, "model: GC%x, revision: %x\n", 379 gpu->identity.model, gpu->identity.revision); 380 381 gpu->idle_mask = ~VIVS_HI_IDLE_STATE_AXI_LP; 382 /* 383 * If there is a match in the HWDB, we aren't interested in the 384 * remaining register values, as they might be wrong. 385 */ 386 if (etnaviv_fill_identity_from_hwdb(gpu)) 387 return; 388 389 gpu->identity.features = gpu_read(gpu, VIVS_HI_CHIP_FEATURE); 390 391 /* Disable fast clear on GC700. */ 392 if (gpu->identity.model == chipModel_GC700) 393 gpu->identity.features &= ~chipFeatures_FAST_CLEAR; 394 395 if ((gpu->identity.model == chipModel_GC500 && 396 gpu->identity.revision < 2) || 397 (gpu->identity.model == chipModel_GC300 && 398 gpu->identity.revision < 0x2000)) { 399 400 /* 401 * GC500 rev 1.x and GC300 rev < 2.0 doesn't have these 402 * registers. 403 */ 404 gpu->identity.minor_features0 = 0; 405 gpu->identity.minor_features1 = 0; 406 gpu->identity.minor_features2 = 0; 407 gpu->identity.minor_features3 = 0; 408 gpu->identity.minor_features4 = 0; 409 gpu->identity.minor_features5 = 0; 410 } else 411 gpu->identity.minor_features0 = 412 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_0); 413 414 if (gpu->identity.minor_features0 & 415 chipMinorFeatures0_MORE_MINOR_FEATURES) { 416 gpu->identity.minor_features1 = 417 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_1); 418 gpu->identity.minor_features2 = 419 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_2); 420 gpu->identity.minor_features3 = 421 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_3); 422 gpu->identity.minor_features4 = 423 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_4); 424 gpu->identity.minor_features5 = 425 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_5); 426 } 427 428 /* GC600 idle register reports zero bits where modules aren't present */ 429 if (gpu->identity.model == chipModel_GC600) 430 gpu->idle_mask = VIVS_HI_IDLE_STATE_TX | 431 VIVS_HI_IDLE_STATE_RA | 432 VIVS_HI_IDLE_STATE_SE | 433 VIVS_HI_IDLE_STATE_PA | 434 VIVS_HI_IDLE_STATE_SH | 435 VIVS_HI_IDLE_STATE_PE | 436 VIVS_HI_IDLE_STATE_DE | 437 VIVS_HI_IDLE_STATE_FE; 438 439 etnaviv_hw_specs(gpu); 440 } 441 442 static void etnaviv_gpu_load_clock(struct etnaviv_gpu *gpu, u32 clock) 443 { 444 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock | 445 VIVS_HI_CLOCK_CONTROL_FSCALE_CMD_LOAD); 446 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock); 447 } 448 449 static void etnaviv_gpu_update_clock(struct etnaviv_gpu *gpu) 450 { 451 if (gpu->identity.minor_features2 & 452 chipMinorFeatures2_DYNAMIC_FREQUENCY_SCALING) { 453 clk_set_rate(gpu->clk_core, 454 gpu->base_rate_core >> gpu->freq_scale); 455 clk_set_rate(gpu->clk_shader, 456 gpu->base_rate_shader >> gpu->freq_scale); 457 } else { 458 unsigned int fscale = 1 << (6 - gpu->freq_scale); 459 u32 clock = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); 460 461 clock &= ~VIVS_HI_CLOCK_CONTROL_FSCALE_VAL__MASK; 462 clock |= VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(fscale); 463 etnaviv_gpu_load_clock(gpu, clock); 464 } 465 } 466 467 static int etnaviv_hw_reset(struct etnaviv_gpu *gpu) 468 { 469 u32 control, idle; 470 unsigned long timeout; 471 bool failed = true; 472 473 /* We hope that the GPU resets in under one second */ 474 timeout = jiffies + msecs_to_jiffies(1000); 475 476 while (time_is_after_jiffies(timeout)) { 477 /* enable clock */ 478 unsigned int fscale = 1 << (6 - gpu->freq_scale); 479 control = VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(fscale); 480 etnaviv_gpu_load_clock(gpu, control); 481 482 /* isolate the GPU. */ 483 control |= VIVS_HI_CLOCK_CONTROL_ISOLATE_GPU; 484 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); 485 486 if (gpu->sec_mode == ETNA_SEC_KERNEL) { 487 gpu_write(gpu, VIVS_MMUv2_AHB_CONTROL, 488 VIVS_MMUv2_AHB_CONTROL_RESET); 489 } else { 490 /* set soft reset. */ 491 control |= VIVS_HI_CLOCK_CONTROL_SOFT_RESET; 492 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); 493 } 494 495 /* wait for reset. */ 496 usleep_range(10, 20); 497 498 /* reset soft reset bit. */ 499 control &= ~VIVS_HI_CLOCK_CONTROL_SOFT_RESET; 500 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); 501 502 /* reset GPU isolation. */ 503 control &= ~VIVS_HI_CLOCK_CONTROL_ISOLATE_GPU; 504 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); 505 506 /* read idle register. */ 507 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); 508 509 /* try reseting again if FE it not idle */ 510 if ((idle & VIVS_HI_IDLE_STATE_FE) == 0) { 511 dev_dbg(gpu->dev, "FE is not idle\n"); 512 continue; 513 } 514 515 /* read reset register. */ 516 control = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); 517 518 /* is the GPU idle? */ 519 if (((control & VIVS_HI_CLOCK_CONTROL_IDLE_3D) == 0) || 520 ((control & VIVS_HI_CLOCK_CONTROL_IDLE_2D) == 0)) { 521 dev_dbg(gpu->dev, "GPU is not idle\n"); 522 continue; 523 } 524 525 /* disable debug registers, as they are not normally needed */ 526 control |= VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS; 527 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); 528 529 failed = false; 530 break; 531 } 532 533 if (failed) { 534 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); 535 control = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); 536 537 dev_err(gpu->dev, "GPU failed to reset: FE %sidle, 3D %sidle, 2D %sidle\n", 538 idle & VIVS_HI_IDLE_STATE_FE ? "" : "not ", 539 control & VIVS_HI_CLOCK_CONTROL_IDLE_3D ? "" : "not ", 540 control & VIVS_HI_CLOCK_CONTROL_IDLE_2D ? "" : "not "); 541 542 return -EBUSY; 543 } 544 545 /* We rely on the GPU running, so program the clock */ 546 etnaviv_gpu_update_clock(gpu); 547 548 return 0; 549 } 550 551 static void etnaviv_gpu_enable_mlcg(struct etnaviv_gpu *gpu) 552 { 553 u32 pmc, ppc; 554 555 /* enable clock gating */ 556 ppc = gpu_read(gpu, VIVS_PM_POWER_CONTROLS); 557 ppc |= VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING; 558 559 /* Disable stall module clock gating for 4.3.0.1 and 4.3.0.2 revs */ 560 if (gpu->identity.revision == 0x4301 || 561 gpu->identity.revision == 0x4302) 562 ppc |= VIVS_PM_POWER_CONTROLS_DISABLE_STALL_MODULE_CLOCK_GATING; 563 564 gpu_write(gpu, VIVS_PM_POWER_CONTROLS, ppc); 565 566 pmc = gpu_read(gpu, VIVS_PM_MODULE_CONTROLS); 567 568 /* Disable PA clock gating for GC400+ without bugfix except for GC420 */ 569 if (gpu->identity.model >= chipModel_GC400 && 570 gpu->identity.model != chipModel_GC420 && 571 !(gpu->identity.minor_features3 & chipMinorFeatures3_BUG_FIXES12)) 572 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PA; 573 574 /* 575 * Disable PE clock gating on revs < 5.0.0.0 when HZ is 576 * present without a bug fix. 577 */ 578 if (gpu->identity.revision < 0x5000 && 579 gpu->identity.minor_features0 & chipMinorFeatures0_HZ && 580 !(gpu->identity.minor_features1 & 581 chipMinorFeatures1_DISABLE_PE_GATING)) 582 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PE; 583 584 if (gpu->identity.revision < 0x5422) 585 pmc |= BIT(15); /* Unknown bit */ 586 587 /* Disable TX clock gating on affected core revisions. */ 588 if (etnaviv_is_model_rev(gpu, GC4000, 0x5222) || 589 etnaviv_is_model_rev(gpu, GC2000, 0x5108)) 590 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_TX; 591 592 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_HZ; 593 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_EZ; 594 595 gpu_write(gpu, VIVS_PM_MODULE_CONTROLS, pmc); 596 } 597 598 void etnaviv_gpu_start_fe(struct etnaviv_gpu *gpu, u32 address, u16 prefetch) 599 { 600 gpu_write(gpu, VIVS_FE_COMMAND_ADDRESS, address); 601 gpu_write(gpu, VIVS_FE_COMMAND_CONTROL, 602 VIVS_FE_COMMAND_CONTROL_ENABLE | 603 VIVS_FE_COMMAND_CONTROL_PREFETCH(prefetch)); 604 605 if (gpu->sec_mode == ETNA_SEC_KERNEL) { 606 gpu_write(gpu, VIVS_MMUv2_SEC_COMMAND_CONTROL, 607 VIVS_MMUv2_SEC_COMMAND_CONTROL_ENABLE | 608 VIVS_MMUv2_SEC_COMMAND_CONTROL_PREFETCH(prefetch)); 609 } 610 } 611 612 static void etnaviv_gpu_start_fe_idleloop(struct etnaviv_gpu *gpu) 613 { 614 u32 address = etnaviv_cmdbuf_get_va(&gpu->buffer, 615 &gpu->mmu_context->cmdbuf_mapping); 616 u16 prefetch; 617 618 /* setup the MMU */ 619 etnaviv_iommu_restore(gpu, gpu->mmu_context); 620 621 /* Start command processor */ 622 prefetch = etnaviv_buffer_init(gpu); 623 624 etnaviv_gpu_start_fe(gpu, address, prefetch); 625 } 626 627 static void etnaviv_gpu_setup_pulse_eater(struct etnaviv_gpu *gpu) 628 { 629 /* 630 * Base value for VIVS_PM_PULSE_EATER register on models where it 631 * cannot be read, extracted from vivante kernel driver. 632 */ 633 u32 pulse_eater = 0x01590880; 634 635 if (etnaviv_is_model_rev(gpu, GC4000, 0x5208) || 636 etnaviv_is_model_rev(gpu, GC4000, 0x5222)) { 637 pulse_eater |= BIT(23); 638 639 } 640 641 if (etnaviv_is_model_rev(gpu, GC1000, 0x5039) || 642 etnaviv_is_model_rev(gpu, GC1000, 0x5040)) { 643 pulse_eater &= ~BIT(16); 644 pulse_eater |= BIT(17); 645 } 646 647 if ((gpu->identity.revision > 0x5420) && 648 (gpu->identity.features & chipFeatures_PIPE_3D)) 649 { 650 /* Performance fix: disable internal DFS */ 651 pulse_eater = gpu_read(gpu, VIVS_PM_PULSE_EATER); 652 pulse_eater |= BIT(18); 653 } 654 655 gpu_write(gpu, VIVS_PM_PULSE_EATER, pulse_eater); 656 } 657 658 static void etnaviv_gpu_hw_init(struct etnaviv_gpu *gpu) 659 { 660 if ((etnaviv_is_model_rev(gpu, GC320, 0x5007) || 661 etnaviv_is_model_rev(gpu, GC320, 0x5220)) && 662 gpu_read(gpu, VIVS_HI_CHIP_TIME) != 0x2062400) { 663 u32 mc_memory_debug; 664 665 mc_memory_debug = gpu_read(gpu, VIVS_MC_DEBUG_MEMORY) & ~0xff; 666 667 if (gpu->identity.revision == 0x5007) 668 mc_memory_debug |= 0x0c; 669 else 670 mc_memory_debug |= 0x08; 671 672 gpu_write(gpu, VIVS_MC_DEBUG_MEMORY, mc_memory_debug); 673 } 674 675 /* enable module-level clock gating */ 676 etnaviv_gpu_enable_mlcg(gpu); 677 678 /* 679 * Update GPU AXI cache atttribute to "cacheable, no allocate". 680 * This is necessary to prevent the iMX6 SoC locking up. 681 */ 682 gpu_write(gpu, VIVS_HI_AXI_CONFIG, 683 VIVS_HI_AXI_CONFIG_AWCACHE(2) | 684 VIVS_HI_AXI_CONFIG_ARCACHE(2)); 685 686 /* GC2000 rev 5108 needs a special bus config */ 687 if (etnaviv_is_model_rev(gpu, GC2000, 0x5108)) { 688 u32 bus_config = gpu_read(gpu, VIVS_MC_BUS_CONFIG); 689 bus_config &= ~(VIVS_MC_BUS_CONFIG_FE_BUS_CONFIG__MASK | 690 VIVS_MC_BUS_CONFIG_TX_BUS_CONFIG__MASK); 691 bus_config |= VIVS_MC_BUS_CONFIG_FE_BUS_CONFIG(1) | 692 VIVS_MC_BUS_CONFIG_TX_BUS_CONFIG(0); 693 gpu_write(gpu, VIVS_MC_BUS_CONFIG, bus_config); 694 } 695 696 if (gpu->sec_mode == ETNA_SEC_KERNEL) { 697 u32 val = gpu_read(gpu, VIVS_MMUv2_AHB_CONTROL); 698 val |= VIVS_MMUv2_AHB_CONTROL_NONSEC_ACCESS; 699 gpu_write(gpu, VIVS_MMUv2_AHB_CONTROL, val); 700 } 701 702 /* setup the pulse eater */ 703 etnaviv_gpu_setup_pulse_eater(gpu); 704 705 gpu_write(gpu, VIVS_HI_INTR_ENBL, ~0U); 706 } 707 708 int etnaviv_gpu_init(struct etnaviv_gpu *gpu) 709 { 710 struct etnaviv_drm_private *priv = gpu->drm->dev_private; 711 int ret, i; 712 713 ret = pm_runtime_get_sync(gpu->dev); 714 if (ret < 0) { 715 dev_err(gpu->dev, "Failed to enable GPU power domain\n"); 716 return ret; 717 } 718 719 etnaviv_hw_identify(gpu); 720 721 if (gpu->identity.model == 0) { 722 dev_err(gpu->dev, "Unknown GPU model\n"); 723 ret = -ENXIO; 724 goto fail; 725 } 726 727 /* Exclude VG cores with FE2.0 */ 728 if (gpu->identity.features & chipFeatures_PIPE_VG && 729 gpu->identity.features & chipFeatures_FE20) { 730 dev_info(gpu->dev, "Ignoring GPU with VG and FE2.0\n"); 731 ret = -ENXIO; 732 goto fail; 733 } 734 735 /* 736 * On cores with security features supported, we claim control over the 737 * security states. 738 */ 739 if ((gpu->identity.minor_features7 & chipMinorFeatures7_BIT_SECURITY) && 740 (gpu->identity.minor_features10 & chipMinorFeatures10_SECURITY_AHB)) 741 gpu->sec_mode = ETNA_SEC_KERNEL; 742 743 ret = etnaviv_hw_reset(gpu); 744 if (ret) { 745 dev_err(gpu->dev, "GPU reset failed\n"); 746 goto fail; 747 } 748 749 ret = etnaviv_iommu_global_init(gpu); 750 if (ret) 751 goto fail; 752 753 /* 754 * Set the GPU linear window to be at the end of the DMA window, where 755 * the CMA area is likely to reside. This ensures that we are able to 756 * map the command buffers while having the linear window overlap as 757 * much RAM as possible, so we can optimize mappings for other buffers. 758 * 759 * For 3D cores only do this if MC2.0 is present, as with MC1.0 it leads 760 * to different views of the memory on the individual engines. 761 */ 762 if (!(gpu->identity.features & chipFeatures_PIPE_3D) || 763 (gpu->identity.minor_features0 & chipMinorFeatures0_MC20)) { 764 u32 dma_mask = (u32)dma_get_required_mask(gpu->dev); 765 if (dma_mask < PHYS_OFFSET + SZ_2G) 766 priv->mmu_global->memory_base = PHYS_OFFSET; 767 else 768 priv->mmu_global->memory_base = dma_mask - SZ_2G + 1; 769 } else if (PHYS_OFFSET >= SZ_2G) { 770 dev_info(gpu->dev, "Need to move linear window on MC1.0, disabling TS\n"); 771 priv->mmu_global->memory_base = PHYS_OFFSET; 772 gpu->identity.features &= ~chipFeatures_FAST_CLEAR; 773 } 774 775 /* Create buffer: */ 776 ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &gpu->buffer, 777 PAGE_SIZE); 778 if (ret) { 779 dev_err(gpu->dev, "could not create command buffer\n"); 780 goto fail; 781 } 782 783 /* Setup event management */ 784 spin_lock_init(&gpu->event_spinlock); 785 init_completion(&gpu->event_free); 786 bitmap_zero(gpu->event_bitmap, ETNA_NR_EVENTS); 787 for (i = 0; i < ARRAY_SIZE(gpu->event); i++) 788 complete(&gpu->event_free); 789 790 /* Now program the hardware */ 791 mutex_lock(&gpu->lock); 792 etnaviv_gpu_hw_init(gpu); 793 gpu->exec_state = -1; 794 mutex_unlock(&gpu->lock); 795 796 pm_runtime_mark_last_busy(gpu->dev); 797 pm_runtime_put_autosuspend(gpu->dev); 798 799 gpu->initialized = true; 800 801 return 0; 802 803 fail: 804 pm_runtime_mark_last_busy(gpu->dev); 805 pm_runtime_put_autosuspend(gpu->dev); 806 807 return ret; 808 } 809 810 #ifdef CONFIG_DEBUG_FS 811 struct dma_debug { 812 u32 address[2]; 813 u32 state[2]; 814 }; 815 816 static void verify_dma(struct etnaviv_gpu *gpu, struct dma_debug *debug) 817 { 818 u32 i; 819 820 debug->address[0] = gpu_read(gpu, VIVS_FE_DMA_ADDRESS); 821 debug->state[0] = gpu_read(gpu, VIVS_FE_DMA_DEBUG_STATE); 822 823 for (i = 0; i < 500; i++) { 824 debug->address[1] = gpu_read(gpu, VIVS_FE_DMA_ADDRESS); 825 debug->state[1] = gpu_read(gpu, VIVS_FE_DMA_DEBUG_STATE); 826 827 if (debug->address[0] != debug->address[1]) 828 break; 829 830 if (debug->state[0] != debug->state[1]) 831 break; 832 } 833 } 834 835 int etnaviv_gpu_debugfs(struct etnaviv_gpu *gpu, struct seq_file *m) 836 { 837 struct dma_debug debug; 838 u32 dma_lo, dma_hi, axi, idle; 839 int ret; 840 841 seq_printf(m, "%s Status:\n", dev_name(gpu->dev)); 842 843 ret = pm_runtime_get_sync(gpu->dev); 844 if (ret < 0) 845 return ret; 846 847 dma_lo = gpu_read(gpu, VIVS_FE_DMA_LOW); 848 dma_hi = gpu_read(gpu, VIVS_FE_DMA_HIGH); 849 axi = gpu_read(gpu, VIVS_HI_AXI_STATUS); 850 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); 851 852 verify_dma(gpu, &debug); 853 854 seq_puts(m, "\tfeatures\n"); 855 seq_printf(m, "\t major_features: 0x%08x\n", 856 gpu->identity.features); 857 seq_printf(m, "\t minor_features0: 0x%08x\n", 858 gpu->identity.minor_features0); 859 seq_printf(m, "\t minor_features1: 0x%08x\n", 860 gpu->identity.minor_features1); 861 seq_printf(m, "\t minor_features2: 0x%08x\n", 862 gpu->identity.minor_features2); 863 seq_printf(m, "\t minor_features3: 0x%08x\n", 864 gpu->identity.minor_features3); 865 seq_printf(m, "\t minor_features4: 0x%08x\n", 866 gpu->identity.minor_features4); 867 seq_printf(m, "\t minor_features5: 0x%08x\n", 868 gpu->identity.minor_features5); 869 seq_printf(m, "\t minor_features6: 0x%08x\n", 870 gpu->identity.minor_features6); 871 seq_printf(m, "\t minor_features7: 0x%08x\n", 872 gpu->identity.minor_features7); 873 seq_printf(m, "\t minor_features8: 0x%08x\n", 874 gpu->identity.minor_features8); 875 seq_printf(m, "\t minor_features9: 0x%08x\n", 876 gpu->identity.minor_features9); 877 seq_printf(m, "\t minor_features10: 0x%08x\n", 878 gpu->identity.minor_features10); 879 seq_printf(m, "\t minor_features11: 0x%08x\n", 880 gpu->identity.minor_features11); 881 882 seq_puts(m, "\tspecs\n"); 883 seq_printf(m, "\t stream_count: %d\n", 884 gpu->identity.stream_count); 885 seq_printf(m, "\t register_max: %d\n", 886 gpu->identity.register_max); 887 seq_printf(m, "\t thread_count: %d\n", 888 gpu->identity.thread_count); 889 seq_printf(m, "\t vertex_cache_size: %d\n", 890 gpu->identity.vertex_cache_size); 891 seq_printf(m, "\t shader_core_count: %d\n", 892 gpu->identity.shader_core_count); 893 seq_printf(m, "\t pixel_pipes: %d\n", 894 gpu->identity.pixel_pipes); 895 seq_printf(m, "\t vertex_output_buffer_size: %d\n", 896 gpu->identity.vertex_output_buffer_size); 897 seq_printf(m, "\t buffer_size: %d\n", 898 gpu->identity.buffer_size); 899 seq_printf(m, "\t instruction_count: %d\n", 900 gpu->identity.instruction_count); 901 seq_printf(m, "\t num_constants: %d\n", 902 gpu->identity.num_constants); 903 seq_printf(m, "\t varyings_count: %d\n", 904 gpu->identity.varyings_count); 905 906 seq_printf(m, "\taxi: 0x%08x\n", axi); 907 seq_printf(m, "\tidle: 0x%08x\n", idle); 908 idle |= ~gpu->idle_mask & ~VIVS_HI_IDLE_STATE_AXI_LP; 909 if ((idle & VIVS_HI_IDLE_STATE_FE) == 0) 910 seq_puts(m, "\t FE is not idle\n"); 911 if ((idle & VIVS_HI_IDLE_STATE_DE) == 0) 912 seq_puts(m, "\t DE is not idle\n"); 913 if ((idle & VIVS_HI_IDLE_STATE_PE) == 0) 914 seq_puts(m, "\t PE is not idle\n"); 915 if ((idle & VIVS_HI_IDLE_STATE_SH) == 0) 916 seq_puts(m, "\t SH is not idle\n"); 917 if ((idle & VIVS_HI_IDLE_STATE_PA) == 0) 918 seq_puts(m, "\t PA is not idle\n"); 919 if ((idle & VIVS_HI_IDLE_STATE_SE) == 0) 920 seq_puts(m, "\t SE is not idle\n"); 921 if ((idle & VIVS_HI_IDLE_STATE_RA) == 0) 922 seq_puts(m, "\t RA is not idle\n"); 923 if ((idle & VIVS_HI_IDLE_STATE_TX) == 0) 924 seq_puts(m, "\t TX is not idle\n"); 925 if ((idle & VIVS_HI_IDLE_STATE_VG) == 0) 926 seq_puts(m, "\t VG is not idle\n"); 927 if ((idle & VIVS_HI_IDLE_STATE_IM) == 0) 928 seq_puts(m, "\t IM is not idle\n"); 929 if ((idle & VIVS_HI_IDLE_STATE_FP) == 0) 930 seq_puts(m, "\t FP is not idle\n"); 931 if ((idle & VIVS_HI_IDLE_STATE_TS) == 0) 932 seq_puts(m, "\t TS is not idle\n"); 933 if (idle & VIVS_HI_IDLE_STATE_AXI_LP) 934 seq_puts(m, "\t AXI low power mode\n"); 935 936 if (gpu->identity.features & chipFeatures_DEBUG_MODE) { 937 u32 read0 = gpu_read(gpu, VIVS_MC_DEBUG_READ0); 938 u32 read1 = gpu_read(gpu, VIVS_MC_DEBUG_READ1); 939 u32 write = gpu_read(gpu, VIVS_MC_DEBUG_WRITE); 940 941 seq_puts(m, "\tMC\n"); 942 seq_printf(m, "\t read0: 0x%08x\n", read0); 943 seq_printf(m, "\t read1: 0x%08x\n", read1); 944 seq_printf(m, "\t write: 0x%08x\n", write); 945 } 946 947 seq_puts(m, "\tDMA "); 948 949 if (debug.address[0] == debug.address[1] && 950 debug.state[0] == debug.state[1]) { 951 seq_puts(m, "seems to be stuck\n"); 952 } else if (debug.address[0] == debug.address[1]) { 953 seq_puts(m, "address is constant\n"); 954 } else { 955 seq_puts(m, "is running\n"); 956 } 957 958 seq_printf(m, "\t address 0: 0x%08x\n", debug.address[0]); 959 seq_printf(m, "\t address 1: 0x%08x\n", debug.address[1]); 960 seq_printf(m, "\t state 0: 0x%08x\n", debug.state[0]); 961 seq_printf(m, "\t state 1: 0x%08x\n", debug.state[1]); 962 seq_printf(m, "\t last fetch 64 bit word: 0x%08x 0x%08x\n", 963 dma_lo, dma_hi); 964 965 ret = 0; 966 967 pm_runtime_mark_last_busy(gpu->dev); 968 pm_runtime_put_autosuspend(gpu->dev); 969 970 return ret; 971 } 972 #endif 973 974 void etnaviv_gpu_recover_hang(struct etnaviv_gpu *gpu) 975 { 976 unsigned int i = 0; 977 978 dev_err(gpu->dev, "recover hung GPU!\n"); 979 980 if (pm_runtime_get_sync(gpu->dev) < 0) 981 return; 982 983 mutex_lock(&gpu->lock); 984 985 etnaviv_hw_reset(gpu); 986 987 /* complete all events, the GPU won't do it after the reset */ 988 spin_lock(&gpu->event_spinlock); 989 for_each_set_bit_from(i, gpu->event_bitmap, ETNA_NR_EVENTS) 990 complete(&gpu->event_free); 991 bitmap_zero(gpu->event_bitmap, ETNA_NR_EVENTS); 992 spin_unlock(&gpu->event_spinlock); 993 994 etnaviv_gpu_hw_init(gpu); 995 gpu->exec_state = -1; 996 gpu->mmu_context = NULL; 997 998 mutex_unlock(&gpu->lock); 999 pm_runtime_mark_last_busy(gpu->dev); 1000 pm_runtime_put_autosuspend(gpu->dev); 1001 } 1002 1003 /* fence object management */ 1004 struct etnaviv_fence { 1005 struct etnaviv_gpu *gpu; 1006 struct dma_fence base; 1007 }; 1008 1009 static inline struct etnaviv_fence *to_etnaviv_fence(struct dma_fence *fence) 1010 { 1011 return container_of(fence, struct etnaviv_fence, base); 1012 } 1013 1014 static const char *etnaviv_fence_get_driver_name(struct dma_fence *fence) 1015 { 1016 return "etnaviv"; 1017 } 1018 1019 static const char *etnaviv_fence_get_timeline_name(struct dma_fence *fence) 1020 { 1021 struct etnaviv_fence *f = to_etnaviv_fence(fence); 1022 1023 return dev_name(f->gpu->dev); 1024 } 1025 1026 static bool etnaviv_fence_signaled(struct dma_fence *fence) 1027 { 1028 struct etnaviv_fence *f = to_etnaviv_fence(fence); 1029 1030 return (s32)(f->gpu->completed_fence - f->base.seqno) >= 0; 1031 } 1032 1033 static void etnaviv_fence_release(struct dma_fence *fence) 1034 { 1035 struct etnaviv_fence *f = to_etnaviv_fence(fence); 1036 1037 kfree_rcu(f, base.rcu); 1038 } 1039 1040 static const struct dma_fence_ops etnaviv_fence_ops = { 1041 .get_driver_name = etnaviv_fence_get_driver_name, 1042 .get_timeline_name = etnaviv_fence_get_timeline_name, 1043 .signaled = etnaviv_fence_signaled, 1044 .release = etnaviv_fence_release, 1045 }; 1046 1047 static struct dma_fence *etnaviv_gpu_fence_alloc(struct etnaviv_gpu *gpu) 1048 { 1049 struct etnaviv_fence *f; 1050 1051 /* 1052 * GPU lock must already be held, otherwise fence completion order might 1053 * not match the seqno order assigned here. 1054 */ 1055 lockdep_assert_held(&gpu->lock); 1056 1057 f = kzalloc(sizeof(*f), GFP_KERNEL); 1058 if (!f) 1059 return NULL; 1060 1061 f->gpu = gpu; 1062 1063 dma_fence_init(&f->base, &etnaviv_fence_ops, &gpu->fence_spinlock, 1064 gpu->fence_context, ++gpu->next_fence); 1065 1066 return &f->base; 1067 } 1068 1069 /* returns true if fence a comes after fence b */ 1070 static inline bool fence_after(u32 a, u32 b) 1071 { 1072 return (s32)(a - b) > 0; 1073 } 1074 1075 /* 1076 * event management: 1077 */ 1078 1079 static int event_alloc(struct etnaviv_gpu *gpu, unsigned nr_events, 1080 unsigned int *events) 1081 { 1082 unsigned long timeout = msecs_to_jiffies(10 * 10000); 1083 unsigned i, acquired = 0; 1084 1085 for (i = 0; i < nr_events; i++) { 1086 unsigned long ret; 1087 1088 ret = wait_for_completion_timeout(&gpu->event_free, timeout); 1089 1090 if (!ret) { 1091 dev_err(gpu->dev, "wait_for_completion_timeout failed"); 1092 goto out; 1093 } 1094 1095 acquired++; 1096 timeout = ret; 1097 } 1098 1099 spin_lock(&gpu->event_spinlock); 1100 1101 for (i = 0; i < nr_events; i++) { 1102 int event = find_first_zero_bit(gpu->event_bitmap, ETNA_NR_EVENTS); 1103 1104 events[i] = event; 1105 memset(&gpu->event[event], 0, sizeof(struct etnaviv_event)); 1106 set_bit(event, gpu->event_bitmap); 1107 } 1108 1109 spin_unlock(&gpu->event_spinlock); 1110 1111 return 0; 1112 1113 out: 1114 for (i = 0; i < acquired; i++) 1115 complete(&gpu->event_free); 1116 1117 return -EBUSY; 1118 } 1119 1120 static void event_free(struct etnaviv_gpu *gpu, unsigned int event) 1121 { 1122 if (!test_bit(event, gpu->event_bitmap)) { 1123 dev_warn(gpu->dev, "event %u is already marked as free", 1124 event); 1125 } else { 1126 clear_bit(event, gpu->event_bitmap); 1127 complete(&gpu->event_free); 1128 } 1129 } 1130 1131 /* 1132 * Cmdstream submission/retirement: 1133 */ 1134 int etnaviv_gpu_wait_fence_interruptible(struct etnaviv_gpu *gpu, 1135 u32 id, struct timespec *timeout) 1136 { 1137 struct dma_fence *fence; 1138 int ret; 1139 1140 /* 1141 * Look up the fence and take a reference. We might still find a fence 1142 * whose refcount has already dropped to zero. dma_fence_get_rcu 1143 * pretends we didn't find a fence in that case. 1144 */ 1145 rcu_read_lock(); 1146 fence = idr_find(&gpu->fence_idr, id); 1147 if (fence) 1148 fence = dma_fence_get_rcu(fence); 1149 rcu_read_unlock(); 1150 1151 if (!fence) 1152 return 0; 1153 1154 if (!timeout) { 1155 /* No timeout was requested: just test for completion */ 1156 ret = dma_fence_is_signaled(fence) ? 0 : -EBUSY; 1157 } else { 1158 unsigned long remaining = etnaviv_timeout_to_jiffies(timeout); 1159 1160 ret = dma_fence_wait_timeout(fence, true, remaining); 1161 if (ret == 0) 1162 ret = -ETIMEDOUT; 1163 else if (ret != -ERESTARTSYS) 1164 ret = 0; 1165 1166 } 1167 1168 dma_fence_put(fence); 1169 return ret; 1170 } 1171 1172 /* 1173 * Wait for an object to become inactive. This, on it's own, is not race 1174 * free: the object is moved by the scheduler off the active list, and 1175 * then the iova is put. Moreover, the object could be re-submitted just 1176 * after we notice that it's become inactive. 1177 * 1178 * Although the retirement happens under the gpu lock, we don't want to hold 1179 * that lock in this function while waiting. 1180 */ 1181 int etnaviv_gpu_wait_obj_inactive(struct etnaviv_gpu *gpu, 1182 struct etnaviv_gem_object *etnaviv_obj, struct timespec *timeout) 1183 { 1184 unsigned long remaining; 1185 long ret; 1186 1187 if (!timeout) 1188 return !is_active(etnaviv_obj) ? 0 : -EBUSY; 1189 1190 remaining = etnaviv_timeout_to_jiffies(timeout); 1191 1192 ret = wait_event_interruptible_timeout(gpu->fence_event, 1193 !is_active(etnaviv_obj), 1194 remaining); 1195 if (ret > 0) 1196 return 0; 1197 else if (ret == -ERESTARTSYS) 1198 return -ERESTARTSYS; 1199 else 1200 return -ETIMEDOUT; 1201 } 1202 1203 static void sync_point_perfmon_sample(struct etnaviv_gpu *gpu, 1204 struct etnaviv_event *event, unsigned int flags) 1205 { 1206 const struct etnaviv_gem_submit *submit = event->submit; 1207 unsigned int i; 1208 1209 for (i = 0; i < submit->nr_pmrs; i++) { 1210 const struct etnaviv_perfmon_request *pmr = submit->pmrs + i; 1211 1212 if (pmr->flags == flags) 1213 etnaviv_perfmon_process(gpu, pmr, submit->exec_state); 1214 } 1215 } 1216 1217 static void sync_point_perfmon_sample_pre(struct etnaviv_gpu *gpu, 1218 struct etnaviv_event *event) 1219 { 1220 u32 val; 1221 1222 /* disable clock gating */ 1223 val = gpu_read(gpu, VIVS_PM_POWER_CONTROLS); 1224 val &= ~VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING; 1225 gpu_write(gpu, VIVS_PM_POWER_CONTROLS, val); 1226 1227 /* enable debug register */ 1228 val = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); 1229 val &= ~VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS; 1230 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, val); 1231 1232 sync_point_perfmon_sample(gpu, event, ETNA_PM_PROCESS_PRE); 1233 } 1234 1235 static void sync_point_perfmon_sample_post(struct etnaviv_gpu *gpu, 1236 struct etnaviv_event *event) 1237 { 1238 const struct etnaviv_gem_submit *submit = event->submit; 1239 unsigned int i; 1240 u32 val; 1241 1242 sync_point_perfmon_sample(gpu, event, ETNA_PM_PROCESS_POST); 1243 1244 for (i = 0; i < submit->nr_pmrs; i++) { 1245 const struct etnaviv_perfmon_request *pmr = submit->pmrs + i; 1246 1247 *pmr->bo_vma = pmr->sequence; 1248 } 1249 1250 /* disable debug register */ 1251 val = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); 1252 val |= VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS; 1253 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, val); 1254 1255 /* enable clock gating */ 1256 val = gpu_read(gpu, VIVS_PM_POWER_CONTROLS); 1257 val |= VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING; 1258 gpu_write(gpu, VIVS_PM_POWER_CONTROLS, val); 1259 } 1260 1261 1262 /* add bo's to gpu's ring, and kick gpu: */ 1263 struct dma_fence *etnaviv_gpu_submit(struct etnaviv_gem_submit *submit) 1264 { 1265 struct etnaviv_gpu *gpu = submit->gpu; 1266 struct dma_fence *gpu_fence; 1267 unsigned int i, nr_events = 1, event[3]; 1268 int ret; 1269 1270 if (!submit->runtime_resumed) { 1271 ret = pm_runtime_get_sync(gpu->dev); 1272 if (ret < 0) 1273 return NULL; 1274 submit->runtime_resumed = true; 1275 } 1276 1277 /* 1278 * if there are performance monitor requests we need to have 1279 * - a sync point to re-configure gpu and process ETNA_PM_PROCESS_PRE 1280 * requests. 1281 * - a sync point to re-configure gpu, process ETNA_PM_PROCESS_POST requests 1282 * and update the sequence number for userspace. 1283 */ 1284 if (submit->nr_pmrs) 1285 nr_events = 3; 1286 1287 ret = event_alloc(gpu, nr_events, event); 1288 if (ret) { 1289 DRM_ERROR("no free events\n"); 1290 return NULL; 1291 } 1292 1293 mutex_lock(&gpu->lock); 1294 1295 gpu_fence = etnaviv_gpu_fence_alloc(gpu); 1296 if (!gpu_fence) { 1297 for (i = 0; i < nr_events; i++) 1298 event_free(gpu, event[i]); 1299 1300 goto out_unlock; 1301 } 1302 1303 if (!gpu->mmu_context) { 1304 etnaviv_iommu_context_get(submit->mmu_context); 1305 gpu->mmu_context = submit->mmu_context; 1306 etnaviv_gpu_start_fe_idleloop(gpu); 1307 } else { 1308 etnaviv_iommu_context_get(gpu->mmu_context); 1309 submit->prev_mmu_context = gpu->mmu_context; 1310 } 1311 1312 if (submit->nr_pmrs) { 1313 gpu->event[event[1]].sync_point = &sync_point_perfmon_sample_pre; 1314 kref_get(&submit->refcount); 1315 gpu->event[event[1]].submit = submit; 1316 etnaviv_sync_point_queue(gpu, event[1]); 1317 } 1318 1319 gpu->event[event[0]].fence = gpu_fence; 1320 submit->cmdbuf.user_size = submit->cmdbuf.size - 8; 1321 etnaviv_buffer_queue(gpu, submit->exec_state, submit->mmu_context, 1322 event[0], &submit->cmdbuf); 1323 1324 if (submit->nr_pmrs) { 1325 gpu->event[event[2]].sync_point = &sync_point_perfmon_sample_post; 1326 kref_get(&submit->refcount); 1327 gpu->event[event[2]].submit = submit; 1328 etnaviv_sync_point_queue(gpu, event[2]); 1329 } 1330 1331 out_unlock: 1332 mutex_unlock(&gpu->lock); 1333 1334 return gpu_fence; 1335 } 1336 1337 static void sync_point_worker(struct work_struct *work) 1338 { 1339 struct etnaviv_gpu *gpu = container_of(work, struct etnaviv_gpu, 1340 sync_point_work); 1341 struct etnaviv_event *event = &gpu->event[gpu->sync_point_event]; 1342 u32 addr = gpu_read(gpu, VIVS_FE_DMA_ADDRESS); 1343 1344 event->sync_point(gpu, event); 1345 etnaviv_submit_put(event->submit); 1346 event_free(gpu, gpu->sync_point_event); 1347 1348 /* restart FE last to avoid GPU and IRQ racing against this worker */ 1349 etnaviv_gpu_start_fe(gpu, addr + 2, 2); 1350 } 1351 1352 static void dump_mmu_fault(struct etnaviv_gpu *gpu) 1353 { 1354 u32 status_reg, status; 1355 int i; 1356 1357 if (gpu->sec_mode == ETNA_SEC_NONE) 1358 status_reg = VIVS_MMUv2_STATUS; 1359 else 1360 status_reg = VIVS_MMUv2_SEC_STATUS; 1361 1362 status = gpu_read(gpu, status_reg); 1363 dev_err_ratelimited(gpu->dev, "MMU fault status 0x%08x\n", status); 1364 1365 for (i = 0; i < 4; i++) { 1366 u32 address_reg; 1367 1368 if (!(status & (VIVS_MMUv2_STATUS_EXCEPTION0__MASK << (i * 4)))) 1369 continue; 1370 1371 if (gpu->sec_mode == ETNA_SEC_NONE) 1372 address_reg = VIVS_MMUv2_EXCEPTION_ADDR(i); 1373 else 1374 address_reg = VIVS_MMUv2_SEC_EXCEPTION_ADDR; 1375 1376 dev_err_ratelimited(gpu->dev, "MMU %d fault addr 0x%08x\n", i, 1377 gpu_read(gpu, address_reg)); 1378 } 1379 } 1380 1381 static irqreturn_t irq_handler(int irq, void *data) 1382 { 1383 struct etnaviv_gpu *gpu = data; 1384 irqreturn_t ret = IRQ_NONE; 1385 1386 u32 intr = gpu_read(gpu, VIVS_HI_INTR_ACKNOWLEDGE); 1387 1388 if (intr != 0) { 1389 int event; 1390 1391 pm_runtime_mark_last_busy(gpu->dev); 1392 1393 dev_dbg(gpu->dev, "intr 0x%08x\n", intr); 1394 1395 if (intr & VIVS_HI_INTR_ACKNOWLEDGE_AXI_BUS_ERROR) { 1396 dev_err(gpu->dev, "AXI bus error\n"); 1397 intr &= ~VIVS_HI_INTR_ACKNOWLEDGE_AXI_BUS_ERROR; 1398 } 1399 1400 if (intr & VIVS_HI_INTR_ACKNOWLEDGE_MMU_EXCEPTION) { 1401 dump_mmu_fault(gpu); 1402 intr &= ~VIVS_HI_INTR_ACKNOWLEDGE_MMU_EXCEPTION; 1403 } 1404 1405 while ((event = ffs(intr)) != 0) { 1406 struct dma_fence *fence; 1407 1408 event -= 1; 1409 1410 intr &= ~(1 << event); 1411 1412 dev_dbg(gpu->dev, "event %u\n", event); 1413 1414 if (gpu->event[event].sync_point) { 1415 gpu->sync_point_event = event; 1416 queue_work(gpu->wq, &gpu->sync_point_work); 1417 } 1418 1419 fence = gpu->event[event].fence; 1420 if (!fence) 1421 continue; 1422 1423 gpu->event[event].fence = NULL; 1424 1425 /* 1426 * Events can be processed out of order. Eg, 1427 * - allocate and queue event 0 1428 * - allocate event 1 1429 * - event 0 completes, we process it 1430 * - allocate and queue event 0 1431 * - event 1 and event 0 complete 1432 * we can end up processing event 0 first, then 1. 1433 */ 1434 if (fence_after(fence->seqno, gpu->completed_fence)) 1435 gpu->completed_fence = fence->seqno; 1436 dma_fence_signal(fence); 1437 1438 event_free(gpu, event); 1439 } 1440 1441 ret = IRQ_HANDLED; 1442 } 1443 1444 return ret; 1445 } 1446 1447 static int etnaviv_gpu_clk_enable(struct etnaviv_gpu *gpu) 1448 { 1449 int ret; 1450 1451 if (gpu->clk_reg) { 1452 ret = clk_prepare_enable(gpu->clk_reg); 1453 if (ret) 1454 return ret; 1455 } 1456 1457 if (gpu->clk_bus) { 1458 ret = clk_prepare_enable(gpu->clk_bus); 1459 if (ret) 1460 return ret; 1461 } 1462 1463 if (gpu->clk_core) { 1464 ret = clk_prepare_enable(gpu->clk_core); 1465 if (ret) 1466 goto disable_clk_bus; 1467 } 1468 1469 if (gpu->clk_shader) { 1470 ret = clk_prepare_enable(gpu->clk_shader); 1471 if (ret) 1472 goto disable_clk_core; 1473 } 1474 1475 return 0; 1476 1477 disable_clk_core: 1478 if (gpu->clk_core) 1479 clk_disable_unprepare(gpu->clk_core); 1480 disable_clk_bus: 1481 if (gpu->clk_bus) 1482 clk_disable_unprepare(gpu->clk_bus); 1483 1484 return ret; 1485 } 1486 1487 static int etnaviv_gpu_clk_disable(struct etnaviv_gpu *gpu) 1488 { 1489 if (gpu->clk_shader) 1490 clk_disable_unprepare(gpu->clk_shader); 1491 if (gpu->clk_core) 1492 clk_disable_unprepare(gpu->clk_core); 1493 if (gpu->clk_bus) 1494 clk_disable_unprepare(gpu->clk_bus); 1495 if (gpu->clk_reg) 1496 clk_disable_unprepare(gpu->clk_reg); 1497 1498 return 0; 1499 } 1500 1501 int etnaviv_gpu_wait_idle(struct etnaviv_gpu *gpu, unsigned int timeout_ms) 1502 { 1503 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms); 1504 1505 do { 1506 u32 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); 1507 1508 if ((idle & gpu->idle_mask) == gpu->idle_mask) 1509 return 0; 1510 1511 if (time_is_before_jiffies(timeout)) { 1512 dev_warn(gpu->dev, 1513 "timed out waiting for idle: idle=0x%x\n", 1514 idle); 1515 return -ETIMEDOUT; 1516 } 1517 1518 udelay(5); 1519 } while (1); 1520 } 1521 1522 static int etnaviv_gpu_hw_suspend(struct etnaviv_gpu *gpu) 1523 { 1524 if (gpu->initialized && gpu->mmu_context) { 1525 /* Replace the last WAIT with END */ 1526 mutex_lock(&gpu->lock); 1527 etnaviv_buffer_end(gpu); 1528 mutex_unlock(&gpu->lock); 1529 1530 /* 1531 * We know that only the FE is busy here, this should 1532 * happen quickly (as the WAIT is only 200 cycles). If 1533 * we fail, just warn and continue. 1534 */ 1535 etnaviv_gpu_wait_idle(gpu, 100); 1536 1537 etnaviv_iommu_context_put(gpu->mmu_context); 1538 gpu->mmu_context = NULL; 1539 } 1540 1541 gpu->exec_state = -1; 1542 1543 return etnaviv_gpu_clk_disable(gpu); 1544 } 1545 1546 #ifdef CONFIG_PM 1547 static int etnaviv_gpu_hw_resume(struct etnaviv_gpu *gpu) 1548 { 1549 int ret; 1550 1551 ret = mutex_lock_killable(&gpu->lock); 1552 if (ret) 1553 return ret; 1554 1555 etnaviv_gpu_update_clock(gpu); 1556 etnaviv_gpu_hw_init(gpu); 1557 1558 mutex_unlock(&gpu->lock); 1559 1560 return 0; 1561 } 1562 #endif 1563 1564 static int 1565 etnaviv_gpu_cooling_get_max_state(struct thermal_cooling_device *cdev, 1566 unsigned long *state) 1567 { 1568 *state = 6; 1569 1570 return 0; 1571 } 1572 1573 static int 1574 etnaviv_gpu_cooling_get_cur_state(struct thermal_cooling_device *cdev, 1575 unsigned long *state) 1576 { 1577 struct etnaviv_gpu *gpu = cdev->devdata; 1578 1579 *state = gpu->freq_scale; 1580 1581 return 0; 1582 } 1583 1584 static int 1585 etnaviv_gpu_cooling_set_cur_state(struct thermal_cooling_device *cdev, 1586 unsigned long state) 1587 { 1588 struct etnaviv_gpu *gpu = cdev->devdata; 1589 1590 mutex_lock(&gpu->lock); 1591 gpu->freq_scale = state; 1592 if (!pm_runtime_suspended(gpu->dev)) 1593 etnaviv_gpu_update_clock(gpu); 1594 mutex_unlock(&gpu->lock); 1595 1596 return 0; 1597 } 1598 1599 static struct thermal_cooling_device_ops cooling_ops = { 1600 .get_max_state = etnaviv_gpu_cooling_get_max_state, 1601 .get_cur_state = etnaviv_gpu_cooling_get_cur_state, 1602 .set_cur_state = etnaviv_gpu_cooling_set_cur_state, 1603 }; 1604 1605 static int etnaviv_gpu_bind(struct device *dev, struct device *master, 1606 void *data) 1607 { 1608 struct drm_device *drm = data; 1609 struct etnaviv_drm_private *priv = drm->dev_private; 1610 struct etnaviv_gpu *gpu = dev_get_drvdata(dev); 1611 int ret; 1612 1613 if (IS_ENABLED(CONFIG_DRM_ETNAVIV_THERMAL)) { 1614 gpu->cooling = thermal_of_cooling_device_register(dev->of_node, 1615 (char *)dev_name(dev), gpu, &cooling_ops); 1616 if (IS_ERR(gpu->cooling)) 1617 return PTR_ERR(gpu->cooling); 1618 } 1619 1620 gpu->wq = alloc_ordered_workqueue(dev_name(dev), 0); 1621 if (!gpu->wq) { 1622 ret = -ENOMEM; 1623 goto out_thermal; 1624 } 1625 1626 ret = etnaviv_sched_init(gpu); 1627 if (ret) 1628 goto out_workqueue; 1629 1630 #ifdef CONFIG_PM 1631 ret = pm_runtime_get_sync(gpu->dev); 1632 #else 1633 ret = etnaviv_gpu_clk_enable(gpu); 1634 #endif 1635 if (ret < 0) 1636 goto out_sched; 1637 1638 1639 gpu->drm = drm; 1640 gpu->fence_context = dma_fence_context_alloc(1); 1641 idr_init(&gpu->fence_idr); 1642 spin_lock_init(&gpu->fence_spinlock); 1643 1644 INIT_WORK(&gpu->sync_point_work, sync_point_worker); 1645 init_waitqueue_head(&gpu->fence_event); 1646 1647 priv->gpu[priv->num_gpus++] = gpu; 1648 1649 pm_runtime_mark_last_busy(gpu->dev); 1650 pm_runtime_put_autosuspend(gpu->dev); 1651 1652 return 0; 1653 1654 out_sched: 1655 etnaviv_sched_fini(gpu); 1656 1657 out_workqueue: 1658 destroy_workqueue(gpu->wq); 1659 1660 out_thermal: 1661 if (IS_ENABLED(CONFIG_DRM_ETNAVIV_THERMAL)) 1662 thermal_cooling_device_unregister(gpu->cooling); 1663 1664 return ret; 1665 } 1666 1667 static void etnaviv_gpu_unbind(struct device *dev, struct device *master, 1668 void *data) 1669 { 1670 struct etnaviv_gpu *gpu = dev_get_drvdata(dev); 1671 1672 DBG("%s", dev_name(gpu->dev)); 1673 1674 flush_workqueue(gpu->wq); 1675 destroy_workqueue(gpu->wq); 1676 1677 etnaviv_sched_fini(gpu); 1678 1679 #ifdef CONFIG_PM 1680 pm_runtime_get_sync(gpu->dev); 1681 pm_runtime_put_sync_suspend(gpu->dev); 1682 #else 1683 etnaviv_gpu_hw_suspend(gpu); 1684 #endif 1685 1686 if (gpu->initialized) { 1687 etnaviv_cmdbuf_free(&gpu->buffer); 1688 etnaviv_iommu_global_fini(gpu); 1689 gpu->initialized = false; 1690 } 1691 1692 gpu->drm = NULL; 1693 idr_destroy(&gpu->fence_idr); 1694 1695 if (IS_ENABLED(CONFIG_DRM_ETNAVIV_THERMAL)) 1696 thermal_cooling_device_unregister(gpu->cooling); 1697 gpu->cooling = NULL; 1698 } 1699 1700 static const struct component_ops gpu_ops = { 1701 .bind = etnaviv_gpu_bind, 1702 .unbind = etnaviv_gpu_unbind, 1703 }; 1704 1705 static const struct of_device_id etnaviv_gpu_match[] = { 1706 { 1707 .compatible = "vivante,gc" 1708 }, 1709 { /* sentinel */ } 1710 }; 1711 MODULE_DEVICE_TABLE(of, etnaviv_gpu_match); 1712 1713 static int etnaviv_gpu_platform_probe(struct platform_device *pdev) 1714 { 1715 struct device *dev = &pdev->dev; 1716 struct etnaviv_gpu *gpu; 1717 int err; 1718 1719 gpu = devm_kzalloc(dev, sizeof(*gpu), GFP_KERNEL); 1720 if (!gpu) 1721 return -ENOMEM; 1722 1723 gpu->dev = &pdev->dev; 1724 mutex_init(&gpu->lock); 1725 mutex_init(&gpu->fence_lock); 1726 1727 /* Map registers: */ 1728 gpu->mmio = devm_platform_ioremap_resource(pdev, 0); 1729 if (IS_ERR(gpu->mmio)) 1730 return PTR_ERR(gpu->mmio); 1731 1732 /* Get Interrupt: */ 1733 gpu->irq = platform_get_irq(pdev, 0); 1734 if (gpu->irq < 0) { 1735 dev_err(dev, "failed to get irq: %d\n", gpu->irq); 1736 return gpu->irq; 1737 } 1738 1739 err = devm_request_irq(&pdev->dev, gpu->irq, irq_handler, 0, 1740 dev_name(gpu->dev), gpu); 1741 if (err) { 1742 dev_err(dev, "failed to request IRQ%u: %d\n", gpu->irq, err); 1743 return err; 1744 } 1745 1746 /* Get Clocks: */ 1747 gpu->clk_reg = devm_clk_get(&pdev->dev, "reg"); 1748 DBG("clk_reg: %p", gpu->clk_reg); 1749 if (IS_ERR(gpu->clk_reg)) 1750 gpu->clk_reg = NULL; 1751 1752 gpu->clk_bus = devm_clk_get(&pdev->dev, "bus"); 1753 DBG("clk_bus: %p", gpu->clk_bus); 1754 if (IS_ERR(gpu->clk_bus)) 1755 gpu->clk_bus = NULL; 1756 1757 gpu->clk_core = devm_clk_get(&pdev->dev, "core"); 1758 DBG("clk_core: %p", gpu->clk_core); 1759 if (IS_ERR(gpu->clk_core)) 1760 gpu->clk_core = NULL; 1761 gpu->base_rate_core = clk_get_rate(gpu->clk_core); 1762 1763 gpu->clk_shader = devm_clk_get(&pdev->dev, "shader"); 1764 DBG("clk_shader: %p", gpu->clk_shader); 1765 if (IS_ERR(gpu->clk_shader)) 1766 gpu->clk_shader = NULL; 1767 gpu->base_rate_shader = clk_get_rate(gpu->clk_shader); 1768 1769 /* TODO: figure out max mapped size */ 1770 dev_set_drvdata(dev, gpu); 1771 1772 /* 1773 * We treat the device as initially suspended. The runtime PM 1774 * autosuspend delay is rather arbitary: no measurements have 1775 * yet been performed to determine an appropriate value. 1776 */ 1777 pm_runtime_use_autosuspend(gpu->dev); 1778 pm_runtime_set_autosuspend_delay(gpu->dev, 200); 1779 pm_runtime_enable(gpu->dev); 1780 1781 err = component_add(&pdev->dev, &gpu_ops); 1782 if (err < 0) { 1783 dev_err(&pdev->dev, "failed to register component: %d\n", err); 1784 return err; 1785 } 1786 1787 return 0; 1788 } 1789 1790 static int etnaviv_gpu_platform_remove(struct platform_device *pdev) 1791 { 1792 component_del(&pdev->dev, &gpu_ops); 1793 pm_runtime_disable(&pdev->dev); 1794 return 0; 1795 } 1796 1797 #ifdef CONFIG_PM 1798 static int etnaviv_gpu_rpm_suspend(struct device *dev) 1799 { 1800 struct etnaviv_gpu *gpu = dev_get_drvdata(dev); 1801 u32 idle, mask; 1802 1803 /* If there are any jobs in the HW queue, we're not idle */ 1804 if (atomic_read(&gpu->sched.hw_rq_count)) 1805 return -EBUSY; 1806 1807 /* Check whether the hardware (except FE) is idle */ 1808 mask = gpu->idle_mask & ~VIVS_HI_IDLE_STATE_FE; 1809 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE) & mask; 1810 if (idle != mask) 1811 return -EBUSY; 1812 1813 return etnaviv_gpu_hw_suspend(gpu); 1814 } 1815 1816 static int etnaviv_gpu_rpm_resume(struct device *dev) 1817 { 1818 struct etnaviv_gpu *gpu = dev_get_drvdata(dev); 1819 int ret; 1820 1821 ret = etnaviv_gpu_clk_enable(gpu); 1822 if (ret) 1823 return ret; 1824 1825 /* Re-initialise the basic hardware state */ 1826 if (gpu->drm && gpu->initialized) { 1827 ret = etnaviv_gpu_hw_resume(gpu); 1828 if (ret) { 1829 etnaviv_gpu_clk_disable(gpu); 1830 return ret; 1831 } 1832 } 1833 1834 return 0; 1835 } 1836 #endif 1837 1838 static const struct dev_pm_ops etnaviv_gpu_pm_ops = { 1839 SET_RUNTIME_PM_OPS(etnaviv_gpu_rpm_suspend, etnaviv_gpu_rpm_resume, 1840 NULL) 1841 }; 1842 1843 struct platform_driver etnaviv_gpu_driver = { 1844 .driver = { 1845 .name = "etnaviv-gpu", 1846 .owner = THIS_MODULE, 1847 .pm = &etnaviv_gpu_pm_ops, 1848 .of_match_table = etnaviv_gpu_match, 1849 }, 1850 .probe = etnaviv_gpu_platform_probe, 1851 .remove = etnaviv_gpu_platform_remove, 1852 .id_table = gpu_ids, 1853 }; 1854