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/mod_devicetable.h> 12 #include <linux/module.h> 13 #include <linux/platform_device.h> 14 #include <linux/pm_runtime.h> 15 #include <linux/regulator/consumer.h> 16 #include <linux/thermal.h> 17 18 #include "etnaviv_cmdbuf.h" 19 #include "etnaviv_dump.h" 20 #include "etnaviv_gpu.h" 21 #include "etnaviv_gem.h" 22 #include "etnaviv_mmu.h" 23 #include "etnaviv_perfmon.h" 24 #include "etnaviv_sched.h" 25 #include "common.xml.h" 26 #include "state.xml.h" 27 #include "state_hi.xml.h" 28 #include "cmdstream.xml.h" 29 30 static const struct platform_device_id gpu_ids[] = { 31 { .name = "etnaviv-gpu,2d" }, 32 { }, 33 }; 34 35 /* 36 * Driver functions: 37 */ 38 39 int etnaviv_gpu_get_param(struct etnaviv_gpu *gpu, u32 param, u64 *value) 40 { 41 struct etnaviv_drm_private *priv = gpu->drm->dev_private; 42 43 switch (param) { 44 case ETNAVIV_PARAM_GPU_MODEL: 45 *value = gpu->identity.model; 46 break; 47 48 case ETNAVIV_PARAM_GPU_REVISION: 49 *value = gpu->identity.revision; 50 break; 51 52 case ETNAVIV_PARAM_GPU_FEATURES_0: 53 *value = gpu->identity.features; 54 break; 55 56 case ETNAVIV_PARAM_GPU_FEATURES_1: 57 *value = gpu->identity.minor_features0; 58 break; 59 60 case ETNAVIV_PARAM_GPU_FEATURES_2: 61 *value = gpu->identity.minor_features1; 62 break; 63 64 case ETNAVIV_PARAM_GPU_FEATURES_3: 65 *value = gpu->identity.minor_features2; 66 break; 67 68 case ETNAVIV_PARAM_GPU_FEATURES_4: 69 *value = gpu->identity.minor_features3; 70 break; 71 72 case ETNAVIV_PARAM_GPU_FEATURES_5: 73 *value = gpu->identity.minor_features4; 74 break; 75 76 case ETNAVIV_PARAM_GPU_FEATURES_6: 77 *value = gpu->identity.minor_features5; 78 break; 79 80 case ETNAVIV_PARAM_GPU_FEATURES_7: 81 *value = gpu->identity.minor_features6; 82 break; 83 84 case ETNAVIV_PARAM_GPU_FEATURES_8: 85 *value = gpu->identity.minor_features7; 86 break; 87 88 case ETNAVIV_PARAM_GPU_FEATURES_9: 89 *value = gpu->identity.minor_features8; 90 break; 91 92 case ETNAVIV_PARAM_GPU_FEATURES_10: 93 *value = gpu->identity.minor_features9; 94 break; 95 96 case ETNAVIV_PARAM_GPU_FEATURES_11: 97 *value = gpu->identity.minor_features10; 98 break; 99 100 case ETNAVIV_PARAM_GPU_FEATURES_12: 101 *value = gpu->identity.minor_features11; 102 break; 103 104 case ETNAVIV_PARAM_GPU_STREAM_COUNT: 105 *value = gpu->identity.stream_count; 106 break; 107 108 case ETNAVIV_PARAM_GPU_REGISTER_MAX: 109 *value = gpu->identity.register_max; 110 break; 111 112 case ETNAVIV_PARAM_GPU_THREAD_COUNT: 113 *value = gpu->identity.thread_count; 114 break; 115 116 case ETNAVIV_PARAM_GPU_VERTEX_CACHE_SIZE: 117 *value = gpu->identity.vertex_cache_size; 118 break; 119 120 case ETNAVIV_PARAM_GPU_SHADER_CORE_COUNT: 121 *value = gpu->identity.shader_core_count; 122 break; 123 124 case ETNAVIV_PARAM_GPU_PIXEL_PIPES: 125 *value = gpu->identity.pixel_pipes; 126 break; 127 128 case ETNAVIV_PARAM_GPU_VERTEX_OUTPUT_BUFFER_SIZE: 129 *value = gpu->identity.vertex_output_buffer_size; 130 break; 131 132 case ETNAVIV_PARAM_GPU_BUFFER_SIZE: 133 *value = gpu->identity.buffer_size; 134 break; 135 136 case ETNAVIV_PARAM_GPU_INSTRUCTION_COUNT: 137 *value = gpu->identity.instruction_count; 138 break; 139 140 case ETNAVIV_PARAM_GPU_NUM_CONSTANTS: 141 *value = gpu->identity.num_constants; 142 break; 143 144 case ETNAVIV_PARAM_GPU_NUM_VARYINGS: 145 *value = gpu->identity.varyings_count; 146 break; 147 148 case ETNAVIV_PARAM_SOFTPIN_START_ADDR: 149 if (priv->mmu_global->version == ETNAVIV_IOMMU_V2) 150 *value = ETNAVIV_SOFTPIN_START_ADDRESS; 151 else 152 *value = ~0ULL; 153 break; 154 155 case ETNAVIV_PARAM_GPU_PRODUCT_ID: 156 *value = gpu->identity.product_id; 157 break; 158 159 case ETNAVIV_PARAM_GPU_CUSTOMER_ID: 160 *value = gpu->identity.customer_id; 161 break; 162 163 case ETNAVIV_PARAM_GPU_ECO_ID: 164 *value = gpu->identity.eco_id; 165 break; 166 167 default: 168 DBG("%s: invalid param: %u", dev_name(gpu->dev), param); 169 return -EINVAL; 170 } 171 172 return 0; 173 } 174 175 176 #define etnaviv_is_model_rev(gpu, mod, rev) \ 177 ((gpu)->identity.model == chipModel_##mod && \ 178 (gpu)->identity.revision == rev) 179 #define etnaviv_field(val, field) \ 180 (((val) & field##__MASK) >> field##__SHIFT) 181 182 static void etnaviv_hw_specs(struct etnaviv_gpu *gpu) 183 { 184 if (gpu->identity.minor_features0 & 185 chipMinorFeatures0_MORE_MINOR_FEATURES) { 186 u32 specs[4]; 187 unsigned int streams; 188 189 specs[0] = gpu_read(gpu, VIVS_HI_CHIP_SPECS); 190 specs[1] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_2); 191 specs[2] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_3); 192 specs[3] = gpu_read(gpu, VIVS_HI_CHIP_SPECS_4); 193 194 gpu->identity.stream_count = etnaviv_field(specs[0], 195 VIVS_HI_CHIP_SPECS_STREAM_COUNT); 196 gpu->identity.register_max = etnaviv_field(specs[0], 197 VIVS_HI_CHIP_SPECS_REGISTER_MAX); 198 gpu->identity.thread_count = etnaviv_field(specs[0], 199 VIVS_HI_CHIP_SPECS_THREAD_COUNT); 200 gpu->identity.vertex_cache_size = etnaviv_field(specs[0], 201 VIVS_HI_CHIP_SPECS_VERTEX_CACHE_SIZE); 202 gpu->identity.shader_core_count = etnaviv_field(specs[0], 203 VIVS_HI_CHIP_SPECS_SHADER_CORE_COUNT); 204 gpu->identity.pixel_pipes = etnaviv_field(specs[0], 205 VIVS_HI_CHIP_SPECS_PIXEL_PIPES); 206 gpu->identity.vertex_output_buffer_size = 207 etnaviv_field(specs[0], 208 VIVS_HI_CHIP_SPECS_VERTEX_OUTPUT_BUFFER_SIZE); 209 210 gpu->identity.buffer_size = etnaviv_field(specs[1], 211 VIVS_HI_CHIP_SPECS_2_BUFFER_SIZE); 212 gpu->identity.instruction_count = etnaviv_field(specs[1], 213 VIVS_HI_CHIP_SPECS_2_INSTRUCTION_COUNT); 214 gpu->identity.num_constants = etnaviv_field(specs[1], 215 VIVS_HI_CHIP_SPECS_2_NUM_CONSTANTS); 216 217 gpu->identity.varyings_count = etnaviv_field(specs[2], 218 VIVS_HI_CHIP_SPECS_3_VARYINGS_COUNT); 219 220 /* This overrides the value from older register if non-zero */ 221 streams = etnaviv_field(specs[3], 222 VIVS_HI_CHIP_SPECS_4_STREAM_COUNT); 223 if (streams) 224 gpu->identity.stream_count = streams; 225 } 226 227 /* Fill in the stream count if not specified */ 228 if (gpu->identity.stream_count == 0) { 229 if (gpu->identity.model >= 0x1000) 230 gpu->identity.stream_count = 4; 231 else 232 gpu->identity.stream_count = 1; 233 } 234 235 /* Convert the register max value */ 236 if (gpu->identity.register_max) 237 gpu->identity.register_max = 1 << gpu->identity.register_max; 238 else if (gpu->identity.model == chipModel_GC400) 239 gpu->identity.register_max = 32; 240 else 241 gpu->identity.register_max = 64; 242 243 /* Convert thread count */ 244 if (gpu->identity.thread_count) 245 gpu->identity.thread_count = 1 << gpu->identity.thread_count; 246 else if (gpu->identity.model == chipModel_GC400) 247 gpu->identity.thread_count = 64; 248 else if (gpu->identity.model == chipModel_GC500 || 249 gpu->identity.model == chipModel_GC530) 250 gpu->identity.thread_count = 128; 251 else 252 gpu->identity.thread_count = 256; 253 254 if (gpu->identity.vertex_cache_size == 0) 255 gpu->identity.vertex_cache_size = 8; 256 257 if (gpu->identity.shader_core_count == 0) { 258 if (gpu->identity.model >= 0x1000) 259 gpu->identity.shader_core_count = 2; 260 else 261 gpu->identity.shader_core_count = 1; 262 } 263 264 if (gpu->identity.pixel_pipes == 0) 265 gpu->identity.pixel_pipes = 1; 266 267 /* Convert virtex buffer size */ 268 if (gpu->identity.vertex_output_buffer_size) { 269 gpu->identity.vertex_output_buffer_size = 270 1 << gpu->identity.vertex_output_buffer_size; 271 } else if (gpu->identity.model == chipModel_GC400) { 272 if (gpu->identity.revision < 0x4000) 273 gpu->identity.vertex_output_buffer_size = 512; 274 else if (gpu->identity.revision < 0x4200) 275 gpu->identity.vertex_output_buffer_size = 256; 276 else 277 gpu->identity.vertex_output_buffer_size = 128; 278 } else { 279 gpu->identity.vertex_output_buffer_size = 512; 280 } 281 282 switch (gpu->identity.instruction_count) { 283 case 0: 284 if (etnaviv_is_model_rev(gpu, GC2000, 0x5108) || 285 gpu->identity.model == chipModel_GC880) 286 gpu->identity.instruction_count = 512; 287 else 288 gpu->identity.instruction_count = 256; 289 break; 290 291 case 1: 292 gpu->identity.instruction_count = 1024; 293 break; 294 295 case 2: 296 gpu->identity.instruction_count = 2048; 297 break; 298 299 default: 300 gpu->identity.instruction_count = 256; 301 break; 302 } 303 304 if (gpu->identity.num_constants == 0) 305 gpu->identity.num_constants = 168; 306 307 if (gpu->identity.varyings_count == 0) { 308 if (gpu->identity.minor_features1 & chipMinorFeatures1_HALTI0) 309 gpu->identity.varyings_count = 12; 310 else 311 gpu->identity.varyings_count = 8; 312 } 313 314 /* 315 * For some cores, two varyings are consumed for position, so the 316 * maximum varying count needs to be reduced by one. 317 */ 318 if (etnaviv_is_model_rev(gpu, GC5000, 0x5434) || 319 etnaviv_is_model_rev(gpu, GC4000, 0x5222) || 320 etnaviv_is_model_rev(gpu, GC4000, 0x5245) || 321 etnaviv_is_model_rev(gpu, GC4000, 0x5208) || 322 etnaviv_is_model_rev(gpu, GC3000, 0x5435) || 323 etnaviv_is_model_rev(gpu, GC2200, 0x5244) || 324 etnaviv_is_model_rev(gpu, GC2100, 0x5108) || 325 etnaviv_is_model_rev(gpu, GC2000, 0x5108) || 326 etnaviv_is_model_rev(gpu, GC1500, 0x5246) || 327 etnaviv_is_model_rev(gpu, GC880, 0x5107) || 328 etnaviv_is_model_rev(gpu, GC880, 0x5106)) 329 gpu->identity.varyings_count -= 1; 330 } 331 332 static void etnaviv_hw_identify(struct etnaviv_gpu *gpu) 333 { 334 u32 chipIdentity; 335 336 chipIdentity = gpu_read(gpu, VIVS_HI_CHIP_IDENTITY); 337 338 /* Special case for older graphic cores. */ 339 if (etnaviv_field(chipIdentity, VIVS_HI_CHIP_IDENTITY_FAMILY) == 0x01) { 340 gpu->identity.model = chipModel_GC500; 341 gpu->identity.revision = etnaviv_field(chipIdentity, 342 VIVS_HI_CHIP_IDENTITY_REVISION); 343 } else { 344 u32 chipDate = gpu_read(gpu, VIVS_HI_CHIP_DATE); 345 346 gpu->identity.model = gpu_read(gpu, VIVS_HI_CHIP_MODEL); 347 gpu->identity.revision = gpu_read(gpu, VIVS_HI_CHIP_REV); 348 gpu->identity.customer_id = gpu_read(gpu, VIVS_HI_CHIP_CUSTOMER_ID); 349 350 /* 351 * Reading these two registers on GC600 rev 0x19 result in a 352 * unhandled fault: external abort on non-linefetch 353 */ 354 if (!etnaviv_is_model_rev(gpu, GC600, 0x19)) { 355 gpu->identity.product_id = gpu_read(gpu, VIVS_HI_CHIP_PRODUCT_ID); 356 gpu->identity.eco_id = gpu_read(gpu, VIVS_HI_CHIP_ECO_ID); 357 } 358 359 /* 360 * !!!! HACK ALERT !!!! 361 * Because people change device IDs without letting software 362 * know about it - here is the hack to make it all look the 363 * same. Only for GC400 family. 364 */ 365 if ((gpu->identity.model & 0xff00) == 0x0400 && 366 gpu->identity.model != chipModel_GC420) { 367 gpu->identity.model = gpu->identity.model & 0x0400; 368 } 369 370 /* Another special case */ 371 if (etnaviv_is_model_rev(gpu, GC300, 0x2201)) { 372 u32 chipTime = gpu_read(gpu, VIVS_HI_CHIP_TIME); 373 374 if (chipDate == 0x20080814 && chipTime == 0x12051100) { 375 /* 376 * This IP has an ECO; put the correct 377 * revision in it. 378 */ 379 gpu->identity.revision = 0x1051; 380 } 381 } 382 383 /* 384 * NXP likes to call the GPU on the i.MX6QP GC2000+, but in 385 * reality it's just a re-branded GC3000. We can identify this 386 * core by the upper half of the revision register being all 1. 387 * Fix model/rev here, so all other places can refer to this 388 * core by its real identity. 389 */ 390 if (etnaviv_is_model_rev(gpu, GC2000, 0xffff5450)) { 391 gpu->identity.model = chipModel_GC3000; 392 gpu->identity.revision &= 0xffff; 393 } 394 395 if (etnaviv_is_model_rev(gpu, GC1000, 0x5037) && (chipDate == 0x20120617)) 396 gpu->identity.eco_id = 1; 397 398 if (etnaviv_is_model_rev(gpu, GC320, 0x5303) && (chipDate == 0x20140511)) 399 gpu->identity.eco_id = 1; 400 } 401 402 dev_info(gpu->dev, "model: GC%x, revision: %x\n", 403 gpu->identity.model, gpu->identity.revision); 404 405 gpu->idle_mask = ~VIVS_HI_IDLE_STATE_AXI_LP; 406 /* 407 * If there is a match in the HWDB, we aren't interested in the 408 * remaining register values, as they might be wrong. 409 */ 410 if (etnaviv_fill_identity_from_hwdb(gpu)) 411 return; 412 413 gpu->identity.features = gpu_read(gpu, VIVS_HI_CHIP_FEATURE); 414 415 /* Disable fast clear on GC700. */ 416 if (gpu->identity.model == chipModel_GC700) 417 gpu->identity.features &= ~chipFeatures_FAST_CLEAR; 418 419 /* These models/revisions don't have the 2D pipe bit */ 420 if ((gpu->identity.model == chipModel_GC500 && 421 gpu->identity.revision <= 2) || 422 gpu->identity.model == chipModel_GC300) 423 gpu->identity.features |= chipFeatures_PIPE_2D; 424 425 if ((gpu->identity.model == chipModel_GC500 && 426 gpu->identity.revision < 2) || 427 (gpu->identity.model == chipModel_GC300 && 428 gpu->identity.revision < 0x2000)) { 429 430 /* 431 * GC500 rev 1.x and GC300 rev < 2.0 doesn't have these 432 * registers. 433 */ 434 gpu->identity.minor_features0 = 0; 435 gpu->identity.minor_features1 = 0; 436 gpu->identity.minor_features2 = 0; 437 gpu->identity.minor_features3 = 0; 438 gpu->identity.minor_features4 = 0; 439 gpu->identity.minor_features5 = 0; 440 } else 441 gpu->identity.minor_features0 = 442 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_0); 443 444 if (gpu->identity.minor_features0 & 445 chipMinorFeatures0_MORE_MINOR_FEATURES) { 446 gpu->identity.minor_features1 = 447 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_1); 448 gpu->identity.minor_features2 = 449 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_2); 450 gpu->identity.minor_features3 = 451 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_3); 452 gpu->identity.minor_features4 = 453 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_4); 454 gpu->identity.minor_features5 = 455 gpu_read(gpu, VIVS_HI_CHIP_MINOR_FEATURE_5); 456 } 457 458 /* GC600/300 idle register reports zero bits where modules aren't present */ 459 if (gpu->identity.model == chipModel_GC600 || 460 gpu->identity.model == chipModel_GC300) 461 gpu->idle_mask = VIVS_HI_IDLE_STATE_TX | 462 VIVS_HI_IDLE_STATE_RA | 463 VIVS_HI_IDLE_STATE_SE | 464 VIVS_HI_IDLE_STATE_PA | 465 VIVS_HI_IDLE_STATE_SH | 466 VIVS_HI_IDLE_STATE_PE | 467 VIVS_HI_IDLE_STATE_DE | 468 VIVS_HI_IDLE_STATE_FE; 469 470 etnaviv_hw_specs(gpu); 471 } 472 473 static void etnaviv_gpu_load_clock(struct etnaviv_gpu *gpu, u32 clock) 474 { 475 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock | 476 VIVS_HI_CLOCK_CONTROL_FSCALE_CMD_LOAD); 477 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock); 478 } 479 480 static void etnaviv_gpu_update_clock(struct etnaviv_gpu *gpu) 481 { 482 if (gpu->identity.minor_features2 & 483 chipMinorFeatures2_DYNAMIC_FREQUENCY_SCALING) { 484 clk_set_rate(gpu->clk_core, 485 gpu->base_rate_core >> gpu->freq_scale); 486 clk_set_rate(gpu->clk_shader, 487 gpu->base_rate_shader >> gpu->freq_scale); 488 } else { 489 unsigned int fscale = 1 << (6 - gpu->freq_scale); 490 u32 clock = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); 491 492 clock &= ~VIVS_HI_CLOCK_CONTROL_FSCALE_VAL__MASK; 493 clock |= VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(fscale); 494 etnaviv_gpu_load_clock(gpu, clock); 495 } 496 497 /* 498 * Choose number of wait cycles to target a ~30us (1/32768) max latency 499 * until new work is picked up by the FE when it polls in the idle loop. 500 * If the GPU base frequency is unknown use 200 wait cycles. 501 */ 502 gpu->fe_waitcycles = clamp(gpu->base_rate_core >> (15 - gpu->freq_scale), 503 200UL, 0xffffUL); 504 } 505 506 static int etnaviv_hw_reset(struct etnaviv_gpu *gpu) 507 { 508 u32 control, idle; 509 unsigned long timeout; 510 bool failed = true; 511 512 /* We hope that the GPU resets in under one second */ 513 timeout = jiffies + msecs_to_jiffies(1000); 514 515 while (time_is_after_jiffies(timeout)) { 516 /* enable clock */ 517 unsigned int fscale = 1 << (6 - gpu->freq_scale); 518 control = VIVS_HI_CLOCK_CONTROL_FSCALE_VAL(fscale); 519 etnaviv_gpu_load_clock(gpu, control); 520 521 /* isolate the GPU. */ 522 control |= VIVS_HI_CLOCK_CONTROL_ISOLATE_GPU; 523 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); 524 525 if (gpu->sec_mode == ETNA_SEC_KERNEL) { 526 gpu_write(gpu, VIVS_MMUv2_AHB_CONTROL, 527 VIVS_MMUv2_AHB_CONTROL_RESET); 528 } else { 529 /* set soft reset. */ 530 control |= VIVS_HI_CLOCK_CONTROL_SOFT_RESET; 531 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); 532 } 533 534 /* wait for reset. */ 535 usleep_range(10, 20); 536 537 /* reset soft reset bit. */ 538 control &= ~VIVS_HI_CLOCK_CONTROL_SOFT_RESET; 539 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); 540 541 /* reset GPU isolation. */ 542 control &= ~VIVS_HI_CLOCK_CONTROL_ISOLATE_GPU; 543 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); 544 545 /* read idle register. */ 546 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); 547 548 /* try resetting again if FE is not idle */ 549 if ((idle & VIVS_HI_IDLE_STATE_FE) == 0) { 550 dev_dbg(gpu->dev, "FE is not idle\n"); 551 continue; 552 } 553 554 /* read reset register. */ 555 control = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); 556 557 /* is the GPU idle? */ 558 if (((control & VIVS_HI_CLOCK_CONTROL_IDLE_3D) == 0) || 559 ((control & VIVS_HI_CLOCK_CONTROL_IDLE_2D) == 0)) { 560 dev_dbg(gpu->dev, "GPU is not idle\n"); 561 continue; 562 } 563 564 /* disable debug registers, as they are not normally needed */ 565 control |= VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS; 566 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, control); 567 568 failed = false; 569 break; 570 } 571 572 if (failed) { 573 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); 574 control = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); 575 576 dev_err(gpu->dev, "GPU failed to reset: FE %sidle, 3D %sidle, 2D %sidle\n", 577 idle & VIVS_HI_IDLE_STATE_FE ? "" : "not ", 578 control & VIVS_HI_CLOCK_CONTROL_IDLE_3D ? "" : "not ", 579 control & VIVS_HI_CLOCK_CONTROL_IDLE_2D ? "" : "not "); 580 581 return -EBUSY; 582 } 583 584 /* We rely on the GPU running, so program the clock */ 585 etnaviv_gpu_update_clock(gpu); 586 587 gpu->state = ETNA_GPU_STATE_RESET; 588 gpu->exec_state = -1; 589 if (gpu->mmu_context) 590 etnaviv_iommu_context_put(gpu->mmu_context); 591 gpu->mmu_context = NULL; 592 593 return 0; 594 } 595 596 static void etnaviv_gpu_enable_mlcg(struct etnaviv_gpu *gpu) 597 { 598 u32 pmc, ppc; 599 600 /* enable clock gating */ 601 ppc = gpu_read_power(gpu, VIVS_PM_POWER_CONTROLS); 602 ppc |= VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING; 603 604 /* Disable stall module clock gating for 4.3.0.1 and 4.3.0.2 revs */ 605 if (gpu->identity.revision == 0x4301 || 606 gpu->identity.revision == 0x4302) 607 ppc |= VIVS_PM_POWER_CONTROLS_DISABLE_STALL_MODULE_CLOCK_GATING; 608 609 gpu_write_power(gpu, VIVS_PM_POWER_CONTROLS, ppc); 610 611 pmc = gpu_read_power(gpu, VIVS_PM_MODULE_CONTROLS); 612 613 /* Disable PA clock gating for GC400+ without bugfix except for GC420 */ 614 if (gpu->identity.model >= chipModel_GC400 && 615 gpu->identity.model != chipModel_GC420 && 616 !(gpu->identity.minor_features3 & chipMinorFeatures3_BUG_FIXES12)) 617 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PA; 618 619 /* 620 * Disable PE clock gating on revs < 5.0.0.0 when HZ is 621 * present without a bug fix. 622 */ 623 if (gpu->identity.revision < 0x5000 && 624 gpu->identity.minor_features0 & chipMinorFeatures0_HZ && 625 !(gpu->identity.minor_features1 & 626 chipMinorFeatures1_DISABLE_PE_GATING)) 627 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_PE; 628 629 if (gpu->identity.revision < 0x5422) 630 pmc |= BIT(15); /* Unknown bit */ 631 632 /* Disable TX clock gating on affected core revisions. */ 633 if (etnaviv_is_model_rev(gpu, GC4000, 0x5222) || 634 etnaviv_is_model_rev(gpu, GC2000, 0x5108) || 635 etnaviv_is_model_rev(gpu, GC7000, 0x6202) || 636 etnaviv_is_model_rev(gpu, GC7000, 0x6203)) 637 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_TX; 638 639 /* Disable SE and RA clock gating on affected core revisions. */ 640 if (etnaviv_is_model_rev(gpu, GC7000, 0x6202)) 641 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_SE | 642 VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA; 643 644 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_HZ; 645 pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_EZ; 646 647 gpu_write_power(gpu, VIVS_PM_MODULE_CONTROLS, pmc); 648 } 649 650 void etnaviv_gpu_start_fe(struct etnaviv_gpu *gpu, u32 address, u16 prefetch) 651 { 652 gpu_write(gpu, VIVS_FE_COMMAND_ADDRESS, address); 653 gpu_write(gpu, VIVS_FE_COMMAND_CONTROL, 654 VIVS_FE_COMMAND_CONTROL_ENABLE | 655 VIVS_FE_COMMAND_CONTROL_PREFETCH(prefetch)); 656 657 if (gpu->sec_mode == ETNA_SEC_KERNEL) { 658 gpu_write(gpu, VIVS_MMUv2_SEC_COMMAND_CONTROL, 659 VIVS_MMUv2_SEC_COMMAND_CONTROL_ENABLE | 660 VIVS_MMUv2_SEC_COMMAND_CONTROL_PREFETCH(prefetch)); 661 } 662 } 663 664 static void etnaviv_gpu_start_fe_idleloop(struct etnaviv_gpu *gpu, 665 struct etnaviv_iommu_context *context) 666 { 667 u16 prefetch; 668 u32 address; 669 670 WARN_ON(gpu->state != ETNA_GPU_STATE_INITIALIZED); 671 672 /* setup the MMU */ 673 etnaviv_iommu_restore(gpu, context); 674 675 /* Start command processor */ 676 prefetch = etnaviv_buffer_init(gpu); 677 address = etnaviv_cmdbuf_get_va(&gpu->buffer, 678 &gpu->mmu_context->cmdbuf_mapping); 679 680 etnaviv_gpu_start_fe(gpu, address, prefetch); 681 682 gpu->state = ETNA_GPU_STATE_RUNNING; 683 } 684 685 static void etnaviv_gpu_setup_pulse_eater(struct etnaviv_gpu *gpu) 686 { 687 /* 688 * Base value for VIVS_PM_PULSE_EATER register on models where it 689 * cannot be read, extracted from vivante kernel driver. 690 */ 691 u32 pulse_eater = 0x01590880; 692 693 if (etnaviv_is_model_rev(gpu, GC4000, 0x5208) || 694 etnaviv_is_model_rev(gpu, GC4000, 0x5222)) { 695 pulse_eater |= BIT(23); 696 697 } 698 699 if (etnaviv_is_model_rev(gpu, GC1000, 0x5039) || 700 etnaviv_is_model_rev(gpu, GC1000, 0x5040)) { 701 pulse_eater &= ~BIT(16); 702 pulse_eater |= BIT(17); 703 } 704 705 if ((gpu->identity.revision > 0x5420) && 706 (gpu->identity.features & chipFeatures_PIPE_3D)) 707 { 708 /* Performance fix: disable internal DFS */ 709 pulse_eater = gpu_read_power(gpu, VIVS_PM_PULSE_EATER); 710 pulse_eater |= BIT(18); 711 } 712 713 gpu_write_power(gpu, VIVS_PM_PULSE_EATER, pulse_eater); 714 } 715 716 static void etnaviv_gpu_hw_init(struct etnaviv_gpu *gpu) 717 { 718 WARN_ON(!(gpu->state == ETNA_GPU_STATE_IDENTIFIED || 719 gpu->state == ETNA_GPU_STATE_RESET)); 720 721 if ((etnaviv_is_model_rev(gpu, GC320, 0x5007) || 722 etnaviv_is_model_rev(gpu, GC320, 0x5220)) && 723 gpu_read(gpu, VIVS_HI_CHIP_TIME) != 0x2062400) { 724 u32 mc_memory_debug; 725 726 mc_memory_debug = gpu_read(gpu, VIVS_MC_DEBUG_MEMORY) & ~0xff; 727 728 if (gpu->identity.revision == 0x5007) 729 mc_memory_debug |= 0x0c; 730 else 731 mc_memory_debug |= 0x08; 732 733 gpu_write(gpu, VIVS_MC_DEBUG_MEMORY, mc_memory_debug); 734 } 735 736 /* enable module-level clock gating */ 737 etnaviv_gpu_enable_mlcg(gpu); 738 739 /* 740 * Update GPU AXI cache atttribute to "cacheable, no allocate". 741 * This is necessary to prevent the iMX6 SoC locking up. 742 */ 743 gpu_write(gpu, VIVS_HI_AXI_CONFIG, 744 VIVS_HI_AXI_CONFIG_AWCACHE(2) | 745 VIVS_HI_AXI_CONFIG_ARCACHE(2)); 746 747 /* GC2000 rev 5108 needs a special bus config */ 748 if (etnaviv_is_model_rev(gpu, GC2000, 0x5108)) { 749 u32 bus_config = gpu_read(gpu, VIVS_MC_BUS_CONFIG); 750 bus_config &= ~(VIVS_MC_BUS_CONFIG_FE_BUS_CONFIG__MASK | 751 VIVS_MC_BUS_CONFIG_TX_BUS_CONFIG__MASK); 752 bus_config |= VIVS_MC_BUS_CONFIG_FE_BUS_CONFIG(1) | 753 VIVS_MC_BUS_CONFIG_TX_BUS_CONFIG(0); 754 gpu_write(gpu, VIVS_MC_BUS_CONFIG, bus_config); 755 } 756 757 if (gpu->sec_mode == ETNA_SEC_KERNEL) { 758 u32 val = gpu_read(gpu, VIVS_MMUv2_AHB_CONTROL); 759 val |= VIVS_MMUv2_AHB_CONTROL_NONSEC_ACCESS; 760 gpu_write(gpu, VIVS_MMUv2_AHB_CONTROL, val); 761 } 762 763 /* setup the pulse eater */ 764 etnaviv_gpu_setup_pulse_eater(gpu); 765 766 gpu_write(gpu, VIVS_HI_INTR_ENBL, ~0U); 767 768 gpu->state = ETNA_GPU_STATE_INITIALIZED; 769 } 770 771 int etnaviv_gpu_init(struct etnaviv_gpu *gpu) 772 { 773 struct etnaviv_drm_private *priv = gpu->drm->dev_private; 774 dma_addr_t cmdbuf_paddr; 775 int ret, i; 776 777 ret = pm_runtime_get_sync(gpu->dev); 778 if (ret < 0) { 779 dev_err(gpu->dev, "Failed to enable GPU power domain\n"); 780 goto pm_put; 781 } 782 783 etnaviv_hw_identify(gpu); 784 785 if (gpu->identity.model == 0) { 786 dev_err(gpu->dev, "Unknown GPU model\n"); 787 ret = -ENXIO; 788 goto fail; 789 } 790 791 if (gpu->identity.nn_core_count > 0) 792 dev_warn(gpu->dev, "etnaviv has been instantiated on a NPU, " 793 "for which the UAPI is still experimental\n"); 794 795 /* Exclude VG cores with FE2.0 */ 796 if (gpu->identity.features & chipFeatures_PIPE_VG && 797 gpu->identity.features & chipFeatures_FE20) { 798 dev_info(gpu->dev, "Ignoring GPU with VG and FE2.0\n"); 799 ret = -ENXIO; 800 goto fail; 801 } 802 803 /* 804 * On cores with security features supported, we claim control over the 805 * security states. 806 */ 807 if ((gpu->identity.minor_features7 & chipMinorFeatures7_BIT_SECURITY) && 808 (gpu->identity.minor_features10 & chipMinorFeatures10_SECURITY_AHB)) 809 gpu->sec_mode = ETNA_SEC_KERNEL; 810 811 gpu->state = ETNA_GPU_STATE_IDENTIFIED; 812 813 ret = etnaviv_hw_reset(gpu); 814 if (ret) { 815 dev_err(gpu->dev, "GPU reset failed\n"); 816 goto fail; 817 } 818 819 ret = etnaviv_iommu_global_init(gpu); 820 if (ret) 821 goto fail; 822 823 /* Create buffer: */ 824 ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &gpu->buffer, 825 PAGE_SIZE); 826 if (ret) { 827 dev_err(gpu->dev, "could not create command buffer\n"); 828 goto fail; 829 } 830 831 /* 832 * Set the GPU linear window to cover the cmdbuf region, as the GPU 833 * won't be able to start execution otherwise. The alignment to 128M is 834 * chosen arbitrarily but helps in debugging, as the MMU offset 835 * calculations are much more straight forward this way. 836 * 837 * On MC1.0 cores the linear window offset is ignored by the TS engine, 838 * leading to inconsistent memory views. Avoid using the offset on those 839 * cores if possible, otherwise disable the TS feature. 840 */ 841 cmdbuf_paddr = ALIGN_DOWN(etnaviv_cmdbuf_get_pa(&gpu->buffer), SZ_128M); 842 843 if (!(gpu->identity.features & chipFeatures_PIPE_3D) || 844 (gpu->identity.minor_features0 & chipMinorFeatures0_MC20)) { 845 if (cmdbuf_paddr >= SZ_2G) 846 priv->mmu_global->memory_base = SZ_2G; 847 else 848 priv->mmu_global->memory_base = cmdbuf_paddr; 849 } else if (cmdbuf_paddr + SZ_128M >= SZ_2G) { 850 dev_info(gpu->dev, 851 "Need to move linear window on MC1.0, disabling TS\n"); 852 gpu->identity.features &= ~chipFeatures_FAST_CLEAR; 853 priv->mmu_global->memory_base = SZ_2G; 854 } 855 856 /* Setup event management */ 857 spin_lock_init(&gpu->event_spinlock); 858 init_completion(&gpu->event_free); 859 bitmap_zero(gpu->event_bitmap, ETNA_NR_EVENTS); 860 for (i = 0; i < ARRAY_SIZE(gpu->event); i++) 861 complete(&gpu->event_free); 862 863 /* Now program the hardware */ 864 mutex_lock(&gpu->lock); 865 etnaviv_gpu_hw_init(gpu); 866 mutex_unlock(&gpu->lock); 867 868 pm_runtime_mark_last_busy(gpu->dev); 869 pm_runtime_put_autosuspend(gpu->dev); 870 871 return 0; 872 873 fail: 874 pm_runtime_mark_last_busy(gpu->dev); 875 pm_put: 876 pm_runtime_put_autosuspend(gpu->dev); 877 878 return ret; 879 } 880 881 #ifdef CONFIG_DEBUG_FS 882 struct dma_debug { 883 u32 address[2]; 884 u32 state[2]; 885 }; 886 887 static void verify_dma(struct etnaviv_gpu *gpu, struct dma_debug *debug) 888 { 889 u32 i; 890 891 debug->address[0] = gpu_read(gpu, VIVS_FE_DMA_ADDRESS); 892 debug->state[0] = gpu_read(gpu, VIVS_FE_DMA_DEBUG_STATE); 893 894 for (i = 0; i < 500; i++) { 895 debug->address[1] = gpu_read(gpu, VIVS_FE_DMA_ADDRESS); 896 debug->state[1] = gpu_read(gpu, VIVS_FE_DMA_DEBUG_STATE); 897 898 if (debug->address[0] != debug->address[1]) 899 break; 900 901 if (debug->state[0] != debug->state[1]) 902 break; 903 } 904 } 905 906 int etnaviv_gpu_debugfs(struct etnaviv_gpu *gpu, struct seq_file *m) 907 { 908 struct dma_debug debug; 909 u32 dma_lo, dma_hi, axi, idle; 910 int ret; 911 912 seq_printf(m, "%s Status:\n", dev_name(gpu->dev)); 913 914 ret = pm_runtime_get_sync(gpu->dev); 915 if (ret < 0) 916 goto pm_put; 917 918 dma_lo = gpu_read(gpu, VIVS_FE_DMA_LOW); 919 dma_hi = gpu_read(gpu, VIVS_FE_DMA_HIGH); 920 axi = gpu_read(gpu, VIVS_HI_AXI_STATUS); 921 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); 922 923 verify_dma(gpu, &debug); 924 925 seq_puts(m, "\tidentity\n"); 926 seq_printf(m, "\t model: 0x%x\n", gpu->identity.model); 927 seq_printf(m, "\t revision: 0x%x\n", gpu->identity.revision); 928 seq_printf(m, "\t product_id: 0x%x\n", gpu->identity.product_id); 929 seq_printf(m, "\t customer_id: 0x%x\n", gpu->identity.customer_id); 930 seq_printf(m, "\t eco_id: 0x%x\n", gpu->identity.eco_id); 931 932 seq_puts(m, "\tfeatures\n"); 933 seq_printf(m, "\t major_features: 0x%08x\n", 934 gpu->identity.features); 935 seq_printf(m, "\t minor_features0: 0x%08x\n", 936 gpu->identity.minor_features0); 937 seq_printf(m, "\t minor_features1: 0x%08x\n", 938 gpu->identity.minor_features1); 939 seq_printf(m, "\t minor_features2: 0x%08x\n", 940 gpu->identity.minor_features2); 941 seq_printf(m, "\t minor_features3: 0x%08x\n", 942 gpu->identity.minor_features3); 943 seq_printf(m, "\t minor_features4: 0x%08x\n", 944 gpu->identity.minor_features4); 945 seq_printf(m, "\t minor_features5: 0x%08x\n", 946 gpu->identity.minor_features5); 947 seq_printf(m, "\t minor_features6: 0x%08x\n", 948 gpu->identity.minor_features6); 949 seq_printf(m, "\t minor_features7: 0x%08x\n", 950 gpu->identity.minor_features7); 951 seq_printf(m, "\t minor_features8: 0x%08x\n", 952 gpu->identity.minor_features8); 953 seq_printf(m, "\t minor_features9: 0x%08x\n", 954 gpu->identity.minor_features9); 955 seq_printf(m, "\t minor_features10: 0x%08x\n", 956 gpu->identity.minor_features10); 957 seq_printf(m, "\t minor_features11: 0x%08x\n", 958 gpu->identity.minor_features11); 959 960 seq_puts(m, "\tspecs\n"); 961 seq_printf(m, "\t stream_count: %d\n", 962 gpu->identity.stream_count); 963 seq_printf(m, "\t register_max: %d\n", 964 gpu->identity.register_max); 965 seq_printf(m, "\t thread_count: %d\n", 966 gpu->identity.thread_count); 967 seq_printf(m, "\t vertex_cache_size: %d\n", 968 gpu->identity.vertex_cache_size); 969 seq_printf(m, "\t shader_core_count: %d\n", 970 gpu->identity.shader_core_count); 971 seq_printf(m, "\t nn_core_count: %d\n", 972 gpu->identity.nn_core_count); 973 seq_printf(m, "\t pixel_pipes: %d\n", 974 gpu->identity.pixel_pipes); 975 seq_printf(m, "\t vertex_output_buffer_size: %d\n", 976 gpu->identity.vertex_output_buffer_size); 977 seq_printf(m, "\t buffer_size: %d\n", 978 gpu->identity.buffer_size); 979 seq_printf(m, "\t instruction_count: %d\n", 980 gpu->identity.instruction_count); 981 seq_printf(m, "\t num_constants: %d\n", 982 gpu->identity.num_constants); 983 seq_printf(m, "\t varyings_count: %d\n", 984 gpu->identity.varyings_count); 985 986 seq_printf(m, "\taxi: 0x%08x\n", axi); 987 seq_printf(m, "\tidle: 0x%08x\n", idle); 988 idle |= ~gpu->idle_mask & ~VIVS_HI_IDLE_STATE_AXI_LP; 989 if ((idle & VIVS_HI_IDLE_STATE_FE) == 0) 990 seq_puts(m, "\t FE is not idle\n"); 991 if ((idle & VIVS_HI_IDLE_STATE_DE) == 0) 992 seq_puts(m, "\t DE is not idle\n"); 993 if ((idle & VIVS_HI_IDLE_STATE_PE) == 0) 994 seq_puts(m, "\t PE is not idle\n"); 995 if ((idle & VIVS_HI_IDLE_STATE_SH) == 0) 996 seq_puts(m, "\t SH is not idle\n"); 997 if ((idle & VIVS_HI_IDLE_STATE_PA) == 0) 998 seq_puts(m, "\t PA is not idle\n"); 999 if ((idle & VIVS_HI_IDLE_STATE_SE) == 0) 1000 seq_puts(m, "\t SE is not idle\n"); 1001 if ((idle & VIVS_HI_IDLE_STATE_RA) == 0) 1002 seq_puts(m, "\t RA is not idle\n"); 1003 if ((idle & VIVS_HI_IDLE_STATE_TX) == 0) 1004 seq_puts(m, "\t TX is not idle\n"); 1005 if ((idle & VIVS_HI_IDLE_STATE_VG) == 0) 1006 seq_puts(m, "\t VG is not idle\n"); 1007 if ((idle & VIVS_HI_IDLE_STATE_IM) == 0) 1008 seq_puts(m, "\t IM is not idle\n"); 1009 if ((idle & VIVS_HI_IDLE_STATE_FP) == 0) 1010 seq_puts(m, "\t FP is not idle\n"); 1011 if ((idle & VIVS_HI_IDLE_STATE_TS) == 0) 1012 seq_puts(m, "\t TS is not idle\n"); 1013 if ((idle & VIVS_HI_IDLE_STATE_BL) == 0) 1014 seq_puts(m, "\t BL is not idle\n"); 1015 if ((idle & VIVS_HI_IDLE_STATE_ASYNCFE) == 0) 1016 seq_puts(m, "\t ASYNCFE is not idle\n"); 1017 if ((idle & VIVS_HI_IDLE_STATE_MC) == 0) 1018 seq_puts(m, "\t MC is not idle\n"); 1019 if ((idle & VIVS_HI_IDLE_STATE_PPA) == 0) 1020 seq_puts(m, "\t PPA is not idle\n"); 1021 if ((idle & VIVS_HI_IDLE_STATE_WD) == 0) 1022 seq_puts(m, "\t WD is not idle\n"); 1023 if ((idle & VIVS_HI_IDLE_STATE_NN) == 0) 1024 seq_puts(m, "\t NN is not idle\n"); 1025 if ((idle & VIVS_HI_IDLE_STATE_TP) == 0) 1026 seq_puts(m, "\t TP is not idle\n"); 1027 if (idle & VIVS_HI_IDLE_STATE_AXI_LP) 1028 seq_puts(m, "\t AXI low power mode\n"); 1029 1030 if (gpu->identity.features & chipFeatures_DEBUG_MODE) { 1031 u32 read0 = gpu_read(gpu, VIVS_MC_DEBUG_READ0); 1032 u32 read1 = gpu_read(gpu, VIVS_MC_DEBUG_READ1); 1033 u32 write = gpu_read(gpu, VIVS_MC_DEBUG_WRITE); 1034 1035 seq_puts(m, "\tMC\n"); 1036 seq_printf(m, "\t read0: 0x%08x\n", read0); 1037 seq_printf(m, "\t read1: 0x%08x\n", read1); 1038 seq_printf(m, "\t write: 0x%08x\n", write); 1039 } 1040 1041 seq_puts(m, "\tDMA "); 1042 1043 if (debug.address[0] == debug.address[1] && 1044 debug.state[0] == debug.state[1]) { 1045 seq_puts(m, "seems to be stuck\n"); 1046 } else if (debug.address[0] == debug.address[1]) { 1047 seq_puts(m, "address is constant\n"); 1048 } else { 1049 seq_puts(m, "is running\n"); 1050 } 1051 1052 seq_printf(m, "\t address 0: 0x%08x\n", debug.address[0]); 1053 seq_printf(m, "\t address 1: 0x%08x\n", debug.address[1]); 1054 seq_printf(m, "\t state 0: 0x%08x\n", debug.state[0]); 1055 seq_printf(m, "\t state 1: 0x%08x\n", debug.state[1]); 1056 seq_printf(m, "\t last fetch 64 bit word: 0x%08x 0x%08x\n", 1057 dma_lo, dma_hi); 1058 1059 ret = 0; 1060 1061 pm_runtime_mark_last_busy(gpu->dev); 1062 pm_put: 1063 pm_runtime_put_autosuspend(gpu->dev); 1064 1065 return ret; 1066 } 1067 #endif 1068 1069 /* fence object management */ 1070 struct etnaviv_fence { 1071 struct etnaviv_gpu *gpu; 1072 struct dma_fence base; 1073 }; 1074 1075 static inline struct etnaviv_fence *to_etnaviv_fence(struct dma_fence *fence) 1076 { 1077 return container_of(fence, struct etnaviv_fence, base); 1078 } 1079 1080 static const char *etnaviv_fence_get_driver_name(struct dma_fence *fence) 1081 { 1082 return "etnaviv"; 1083 } 1084 1085 static const char *etnaviv_fence_get_timeline_name(struct dma_fence *fence) 1086 { 1087 struct etnaviv_fence *f = to_etnaviv_fence(fence); 1088 1089 return dev_name(f->gpu->dev); 1090 } 1091 1092 static bool etnaviv_fence_signaled(struct dma_fence *fence) 1093 { 1094 struct etnaviv_fence *f = to_etnaviv_fence(fence); 1095 1096 return (s32)(f->gpu->completed_fence - f->base.seqno) >= 0; 1097 } 1098 1099 static void etnaviv_fence_release(struct dma_fence *fence) 1100 { 1101 struct etnaviv_fence *f = to_etnaviv_fence(fence); 1102 1103 kfree_rcu(f, base.rcu); 1104 } 1105 1106 static const struct dma_fence_ops etnaviv_fence_ops = { 1107 .get_driver_name = etnaviv_fence_get_driver_name, 1108 .get_timeline_name = etnaviv_fence_get_timeline_name, 1109 .signaled = etnaviv_fence_signaled, 1110 .release = etnaviv_fence_release, 1111 }; 1112 1113 static struct dma_fence *etnaviv_gpu_fence_alloc(struct etnaviv_gpu *gpu) 1114 { 1115 struct etnaviv_fence *f; 1116 1117 /* 1118 * GPU lock must already be held, otherwise fence completion order might 1119 * not match the seqno order assigned here. 1120 */ 1121 lockdep_assert_held(&gpu->lock); 1122 1123 f = kzalloc(sizeof(*f), GFP_KERNEL); 1124 if (!f) 1125 return NULL; 1126 1127 f->gpu = gpu; 1128 1129 dma_fence_init(&f->base, &etnaviv_fence_ops, &gpu->fence_spinlock, 1130 gpu->fence_context, ++gpu->next_fence); 1131 1132 return &f->base; 1133 } 1134 1135 /* returns true if fence a comes after fence b */ 1136 static inline bool fence_after(u32 a, u32 b) 1137 { 1138 return (s32)(a - b) > 0; 1139 } 1140 1141 /* 1142 * event management: 1143 */ 1144 1145 static int event_alloc(struct etnaviv_gpu *gpu, unsigned nr_events, 1146 unsigned int *events) 1147 { 1148 unsigned long timeout = msecs_to_jiffies(10 * 10000); 1149 unsigned i, acquired = 0, rpm_count = 0; 1150 int ret; 1151 1152 for (i = 0; i < nr_events; i++) { 1153 unsigned long remaining; 1154 1155 remaining = wait_for_completion_timeout(&gpu->event_free, timeout); 1156 1157 if (!remaining) { 1158 dev_err(gpu->dev, "wait_for_completion_timeout failed"); 1159 ret = -EBUSY; 1160 goto out; 1161 } 1162 1163 acquired++; 1164 timeout = remaining; 1165 } 1166 1167 spin_lock(&gpu->event_spinlock); 1168 1169 for (i = 0; i < nr_events; i++) { 1170 int event = find_first_zero_bit(gpu->event_bitmap, ETNA_NR_EVENTS); 1171 1172 events[i] = event; 1173 memset(&gpu->event[event], 0, sizeof(struct etnaviv_event)); 1174 set_bit(event, gpu->event_bitmap); 1175 } 1176 1177 spin_unlock(&gpu->event_spinlock); 1178 1179 for (i = 0; i < nr_events; i++) { 1180 ret = pm_runtime_resume_and_get(gpu->dev); 1181 if (ret) 1182 goto out_rpm; 1183 rpm_count++; 1184 } 1185 1186 return 0; 1187 1188 out_rpm: 1189 for (i = 0; i < rpm_count; i++) 1190 pm_runtime_put_autosuspend(gpu->dev); 1191 out: 1192 for (i = 0; i < acquired; i++) 1193 complete(&gpu->event_free); 1194 1195 return ret; 1196 } 1197 1198 static void event_free(struct etnaviv_gpu *gpu, unsigned int event) 1199 { 1200 if (!test_bit(event, gpu->event_bitmap)) { 1201 dev_warn(gpu->dev, "event %u is already marked as free", 1202 event); 1203 } else { 1204 clear_bit(event, gpu->event_bitmap); 1205 complete(&gpu->event_free); 1206 } 1207 1208 pm_runtime_put_autosuspend(gpu->dev); 1209 } 1210 1211 /* 1212 * Cmdstream submission/retirement: 1213 */ 1214 int etnaviv_gpu_wait_fence_interruptible(struct etnaviv_gpu *gpu, 1215 u32 id, struct drm_etnaviv_timespec *timeout) 1216 { 1217 struct dma_fence *fence; 1218 int ret; 1219 1220 /* 1221 * Look up the fence and take a reference. We might still find a fence 1222 * whose refcount has already dropped to zero. dma_fence_get_rcu 1223 * pretends we didn't find a fence in that case. 1224 */ 1225 rcu_read_lock(); 1226 fence = xa_load(&gpu->user_fences, id); 1227 if (fence) 1228 fence = dma_fence_get_rcu(fence); 1229 rcu_read_unlock(); 1230 1231 if (!fence) 1232 return 0; 1233 1234 if (!timeout) { 1235 /* No timeout was requested: just test for completion */ 1236 ret = dma_fence_is_signaled(fence) ? 0 : -EBUSY; 1237 } else { 1238 unsigned long remaining = etnaviv_timeout_to_jiffies(timeout); 1239 1240 ret = dma_fence_wait_timeout(fence, true, remaining); 1241 if (ret == 0) 1242 ret = -ETIMEDOUT; 1243 else if (ret != -ERESTARTSYS) 1244 ret = 0; 1245 1246 } 1247 1248 dma_fence_put(fence); 1249 return ret; 1250 } 1251 1252 /* 1253 * Wait for an object to become inactive. This, on it's own, is not race 1254 * free: the object is moved by the scheduler off the active list, and 1255 * then the iova is put. Moreover, the object could be re-submitted just 1256 * after we notice that it's become inactive. 1257 * 1258 * Although the retirement happens under the gpu lock, we don't want to hold 1259 * that lock in this function while waiting. 1260 */ 1261 int etnaviv_gpu_wait_obj_inactive(struct etnaviv_gpu *gpu, 1262 struct etnaviv_gem_object *etnaviv_obj, 1263 struct drm_etnaviv_timespec *timeout) 1264 { 1265 unsigned long remaining; 1266 long ret; 1267 1268 if (!timeout) 1269 return !is_active(etnaviv_obj) ? 0 : -EBUSY; 1270 1271 remaining = etnaviv_timeout_to_jiffies(timeout); 1272 1273 ret = wait_event_interruptible_timeout(gpu->fence_event, 1274 !is_active(etnaviv_obj), 1275 remaining); 1276 if (ret > 0) 1277 return 0; 1278 else if (ret == -ERESTARTSYS) 1279 return -ERESTARTSYS; 1280 else 1281 return -ETIMEDOUT; 1282 } 1283 1284 static void sync_point_perfmon_sample(struct etnaviv_gpu *gpu, 1285 struct etnaviv_event *event, unsigned int flags) 1286 { 1287 const struct etnaviv_gem_submit *submit = event->submit; 1288 unsigned int i; 1289 1290 for (i = 0; i < submit->nr_pmrs; i++) { 1291 const struct etnaviv_perfmon_request *pmr = submit->pmrs + i; 1292 1293 if (pmr->flags == flags) 1294 etnaviv_perfmon_process(gpu, pmr, submit->exec_state); 1295 } 1296 } 1297 1298 static void sync_point_perfmon_sample_pre(struct etnaviv_gpu *gpu, 1299 struct etnaviv_event *event) 1300 { 1301 u32 val; 1302 1303 mutex_lock(&gpu->lock); 1304 1305 /* disable clock gating */ 1306 val = gpu_read_power(gpu, VIVS_PM_POWER_CONTROLS); 1307 val &= ~VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING; 1308 gpu_write_power(gpu, VIVS_PM_POWER_CONTROLS, val); 1309 1310 /* enable debug register */ 1311 val = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); 1312 val &= ~VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS; 1313 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, val); 1314 1315 sync_point_perfmon_sample(gpu, event, ETNA_PM_PROCESS_PRE); 1316 1317 mutex_unlock(&gpu->lock); 1318 } 1319 1320 static void sync_point_perfmon_sample_post(struct etnaviv_gpu *gpu, 1321 struct etnaviv_event *event) 1322 { 1323 const struct etnaviv_gem_submit *submit = event->submit; 1324 unsigned int i; 1325 u32 val; 1326 1327 mutex_lock(&gpu->lock); 1328 1329 sync_point_perfmon_sample(gpu, event, ETNA_PM_PROCESS_POST); 1330 1331 /* disable debug register */ 1332 val = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL); 1333 val |= VIVS_HI_CLOCK_CONTROL_DISABLE_DEBUG_REGISTERS; 1334 gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, val); 1335 1336 /* enable clock gating */ 1337 val = gpu_read_power(gpu, VIVS_PM_POWER_CONTROLS); 1338 val |= VIVS_PM_POWER_CONTROLS_ENABLE_MODULE_CLOCK_GATING; 1339 gpu_write_power(gpu, VIVS_PM_POWER_CONTROLS, val); 1340 1341 mutex_unlock(&gpu->lock); 1342 1343 for (i = 0; i < submit->nr_pmrs; i++) { 1344 const struct etnaviv_perfmon_request *pmr = submit->pmrs + i; 1345 1346 *pmr->bo_vma = pmr->sequence; 1347 } 1348 } 1349 1350 1351 /* add bo's to gpu's ring, and kick gpu: */ 1352 struct dma_fence *etnaviv_gpu_submit(struct etnaviv_gem_submit *submit) 1353 { 1354 struct etnaviv_gpu *gpu = submit->gpu; 1355 struct dma_fence *gpu_fence; 1356 unsigned int i, nr_events = 1, event[3]; 1357 int ret; 1358 1359 /* 1360 * if there are performance monitor requests we need to have 1361 * - a sync point to re-configure gpu and process ETNA_PM_PROCESS_PRE 1362 * requests. 1363 * - a sync point to re-configure gpu, process ETNA_PM_PROCESS_POST requests 1364 * and update the sequence number for userspace. 1365 */ 1366 if (submit->nr_pmrs) 1367 nr_events = 3; 1368 1369 ret = event_alloc(gpu, nr_events, event); 1370 if (ret) { 1371 DRM_ERROR("no free events\n"); 1372 pm_runtime_put_noidle(gpu->dev); 1373 return NULL; 1374 } 1375 1376 mutex_lock(&gpu->lock); 1377 1378 gpu_fence = etnaviv_gpu_fence_alloc(gpu); 1379 if (!gpu_fence) { 1380 for (i = 0; i < nr_events; i++) 1381 event_free(gpu, event[i]); 1382 1383 goto out_unlock; 1384 } 1385 1386 if (gpu->state == ETNA_GPU_STATE_INITIALIZED) 1387 etnaviv_gpu_start_fe_idleloop(gpu, submit->mmu_context); 1388 1389 if (submit->prev_mmu_context) 1390 etnaviv_iommu_context_put(submit->prev_mmu_context); 1391 submit->prev_mmu_context = etnaviv_iommu_context_get(gpu->mmu_context); 1392 1393 if (submit->nr_pmrs) { 1394 gpu->event[event[1]].sync_point = &sync_point_perfmon_sample_pre; 1395 kref_get(&submit->refcount); 1396 gpu->event[event[1]].submit = submit; 1397 etnaviv_sync_point_queue(gpu, event[1]); 1398 } 1399 1400 gpu->event[event[0]].fence = gpu_fence; 1401 submit->cmdbuf.user_size = submit->cmdbuf.size - 8; 1402 etnaviv_buffer_queue(gpu, submit->exec_state, submit->mmu_context, 1403 event[0], &submit->cmdbuf); 1404 1405 if (submit->nr_pmrs) { 1406 gpu->event[event[2]].sync_point = &sync_point_perfmon_sample_post; 1407 kref_get(&submit->refcount); 1408 gpu->event[event[2]].submit = submit; 1409 etnaviv_sync_point_queue(gpu, event[2]); 1410 } 1411 1412 out_unlock: 1413 mutex_unlock(&gpu->lock); 1414 1415 return gpu_fence; 1416 } 1417 1418 static void sync_point_worker(struct work_struct *work) 1419 { 1420 struct etnaviv_gpu *gpu = container_of(work, struct etnaviv_gpu, 1421 sync_point_work); 1422 struct etnaviv_event *event = &gpu->event[gpu->sync_point_event]; 1423 u32 addr = gpu_read(gpu, VIVS_FE_DMA_ADDRESS); 1424 1425 event->sync_point(gpu, event); 1426 etnaviv_submit_put(event->submit); 1427 event_free(gpu, gpu->sync_point_event); 1428 1429 /* restart FE last to avoid GPU and IRQ racing against this worker */ 1430 etnaviv_gpu_start_fe(gpu, addr + 2, 2); 1431 } 1432 1433 void etnaviv_gpu_recover_hang(struct etnaviv_gem_submit *submit) 1434 { 1435 struct etnaviv_gpu *gpu = submit->gpu; 1436 char *comm = NULL, *cmd = NULL; 1437 struct task_struct *task; 1438 unsigned int i; 1439 1440 dev_err(gpu->dev, "recover hung GPU!\n"); 1441 1442 task = get_pid_task(submit->pid, PIDTYPE_PID); 1443 if (task) { 1444 comm = kstrdup(task->comm, GFP_KERNEL); 1445 cmd = kstrdup_quotable_cmdline(task, GFP_KERNEL); 1446 put_task_struct(task); 1447 } 1448 1449 if (comm && cmd) 1450 dev_err(gpu->dev, "offending task: %s (%s)\n", comm, cmd); 1451 1452 kfree(cmd); 1453 kfree(comm); 1454 1455 if (pm_runtime_get_sync(gpu->dev) < 0) 1456 goto pm_put; 1457 1458 mutex_lock(&gpu->lock); 1459 1460 etnaviv_hw_reset(gpu); 1461 1462 /* complete all events, the GPU won't do it after the reset */ 1463 spin_lock(&gpu->event_spinlock); 1464 for_each_set_bit(i, gpu->event_bitmap, ETNA_NR_EVENTS) 1465 event_free(gpu, i); 1466 spin_unlock(&gpu->event_spinlock); 1467 1468 etnaviv_gpu_hw_init(gpu); 1469 1470 mutex_unlock(&gpu->lock); 1471 pm_runtime_mark_last_busy(gpu->dev); 1472 pm_put: 1473 pm_runtime_put_autosuspend(gpu->dev); 1474 } 1475 1476 static void dump_mmu_fault(struct etnaviv_gpu *gpu) 1477 { 1478 static const char *fault_reasons[] = { 1479 "slave not present", 1480 "page not present", 1481 "write violation", 1482 "out of bounds", 1483 "read security violation", 1484 "write security violation", 1485 }; 1486 1487 u32 status_reg, status; 1488 int i; 1489 1490 if (gpu->sec_mode == ETNA_SEC_NONE) 1491 status_reg = VIVS_MMUv2_STATUS; 1492 else 1493 status_reg = VIVS_MMUv2_SEC_STATUS; 1494 1495 status = gpu_read(gpu, status_reg); 1496 dev_err_ratelimited(gpu->dev, "MMU fault status 0x%08x\n", status); 1497 1498 for (i = 0; i < 4; i++) { 1499 const char *reason = "unknown"; 1500 u32 address_reg; 1501 u32 mmu_status; 1502 1503 mmu_status = (status >> (i * 4)) & VIVS_MMUv2_STATUS_EXCEPTION0__MASK; 1504 if (!mmu_status) 1505 continue; 1506 1507 if ((mmu_status - 1) < ARRAY_SIZE(fault_reasons)) 1508 reason = fault_reasons[mmu_status - 1]; 1509 1510 if (gpu->sec_mode == ETNA_SEC_NONE) 1511 address_reg = VIVS_MMUv2_EXCEPTION_ADDR(i); 1512 else 1513 address_reg = VIVS_MMUv2_SEC_EXCEPTION_ADDR; 1514 1515 dev_err_ratelimited(gpu->dev, 1516 "MMU %d fault (%s) addr 0x%08x\n", 1517 i, reason, gpu_read(gpu, address_reg)); 1518 } 1519 } 1520 1521 static irqreturn_t irq_handler(int irq, void *data) 1522 { 1523 struct etnaviv_gpu *gpu = data; 1524 irqreturn_t ret = IRQ_NONE; 1525 1526 u32 intr = gpu_read(gpu, VIVS_HI_INTR_ACKNOWLEDGE); 1527 1528 if (intr != 0) { 1529 int event; 1530 1531 pm_runtime_mark_last_busy(gpu->dev); 1532 1533 dev_dbg(gpu->dev, "intr 0x%08x\n", intr); 1534 1535 if (intr & VIVS_HI_INTR_ACKNOWLEDGE_AXI_BUS_ERROR) { 1536 dev_err(gpu->dev, "AXI bus error\n"); 1537 intr &= ~VIVS_HI_INTR_ACKNOWLEDGE_AXI_BUS_ERROR; 1538 } 1539 1540 if (intr & VIVS_HI_INTR_ACKNOWLEDGE_MMU_EXCEPTION) { 1541 dump_mmu_fault(gpu); 1542 gpu->state = ETNA_GPU_STATE_FAULT; 1543 drm_sched_fault(&gpu->sched); 1544 intr &= ~VIVS_HI_INTR_ACKNOWLEDGE_MMU_EXCEPTION; 1545 } 1546 1547 while ((event = ffs(intr)) != 0) { 1548 struct dma_fence *fence; 1549 1550 event -= 1; 1551 1552 intr &= ~(1 << event); 1553 1554 dev_dbg(gpu->dev, "event %u\n", event); 1555 1556 if (gpu->event[event].sync_point) { 1557 gpu->sync_point_event = event; 1558 queue_work(gpu->wq, &gpu->sync_point_work); 1559 } 1560 1561 fence = gpu->event[event].fence; 1562 if (!fence) 1563 continue; 1564 1565 gpu->event[event].fence = NULL; 1566 1567 /* 1568 * Events can be processed out of order. Eg, 1569 * - allocate and queue event 0 1570 * - allocate event 1 1571 * - event 0 completes, we process it 1572 * - allocate and queue event 0 1573 * - event 1 and event 0 complete 1574 * we can end up processing event 0 first, then 1. 1575 */ 1576 if (fence_after(fence->seqno, gpu->completed_fence)) 1577 gpu->completed_fence = fence->seqno; 1578 dma_fence_signal(fence); 1579 1580 event_free(gpu, event); 1581 } 1582 1583 ret = IRQ_HANDLED; 1584 } 1585 1586 return ret; 1587 } 1588 1589 static int etnaviv_gpu_clk_enable(struct etnaviv_gpu *gpu) 1590 { 1591 int ret; 1592 1593 ret = clk_prepare_enable(gpu->clk_reg); 1594 if (ret) 1595 return ret; 1596 1597 ret = clk_prepare_enable(gpu->clk_bus); 1598 if (ret) 1599 goto disable_clk_reg; 1600 1601 ret = clk_prepare_enable(gpu->clk_core); 1602 if (ret) 1603 goto disable_clk_bus; 1604 1605 ret = clk_prepare_enable(gpu->clk_shader); 1606 if (ret) 1607 goto disable_clk_core; 1608 1609 return 0; 1610 1611 disable_clk_core: 1612 clk_disable_unprepare(gpu->clk_core); 1613 disable_clk_bus: 1614 clk_disable_unprepare(gpu->clk_bus); 1615 disable_clk_reg: 1616 clk_disable_unprepare(gpu->clk_reg); 1617 1618 return ret; 1619 } 1620 1621 static int etnaviv_gpu_clk_disable(struct etnaviv_gpu *gpu) 1622 { 1623 clk_disable_unprepare(gpu->clk_shader); 1624 clk_disable_unprepare(gpu->clk_core); 1625 clk_disable_unprepare(gpu->clk_bus); 1626 clk_disable_unprepare(gpu->clk_reg); 1627 1628 return 0; 1629 } 1630 1631 int etnaviv_gpu_wait_idle(struct etnaviv_gpu *gpu, unsigned int timeout_ms) 1632 { 1633 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms); 1634 1635 do { 1636 u32 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); 1637 1638 if ((idle & gpu->idle_mask) == gpu->idle_mask) 1639 return 0; 1640 1641 if (time_is_before_jiffies(timeout)) { 1642 dev_warn(gpu->dev, 1643 "timed out waiting for idle: idle=0x%x\n", 1644 idle); 1645 return -ETIMEDOUT; 1646 } 1647 1648 udelay(5); 1649 } while (1); 1650 } 1651 1652 static void etnaviv_gpu_hw_suspend(struct etnaviv_gpu *gpu) 1653 { 1654 if (gpu->state == ETNA_GPU_STATE_RUNNING) { 1655 /* Replace the last WAIT with END */ 1656 mutex_lock(&gpu->lock); 1657 etnaviv_buffer_end(gpu); 1658 mutex_unlock(&gpu->lock); 1659 1660 /* 1661 * We know that only the FE is busy here, this should 1662 * happen quickly (as the WAIT is only 200 cycles). If 1663 * we fail, just warn and continue. 1664 */ 1665 etnaviv_gpu_wait_idle(gpu, 100); 1666 1667 gpu->state = ETNA_GPU_STATE_INITIALIZED; 1668 } 1669 1670 gpu->exec_state = -1; 1671 } 1672 1673 static int etnaviv_gpu_hw_resume(struct etnaviv_gpu *gpu) 1674 { 1675 int ret; 1676 1677 ret = mutex_lock_killable(&gpu->lock); 1678 if (ret) 1679 return ret; 1680 1681 etnaviv_gpu_update_clock(gpu); 1682 etnaviv_gpu_hw_init(gpu); 1683 1684 mutex_unlock(&gpu->lock); 1685 1686 return 0; 1687 } 1688 1689 static int 1690 etnaviv_gpu_cooling_get_max_state(struct thermal_cooling_device *cdev, 1691 unsigned long *state) 1692 { 1693 *state = 6; 1694 1695 return 0; 1696 } 1697 1698 static int 1699 etnaviv_gpu_cooling_get_cur_state(struct thermal_cooling_device *cdev, 1700 unsigned long *state) 1701 { 1702 struct etnaviv_gpu *gpu = cdev->devdata; 1703 1704 *state = gpu->freq_scale; 1705 1706 return 0; 1707 } 1708 1709 static int 1710 etnaviv_gpu_cooling_set_cur_state(struct thermal_cooling_device *cdev, 1711 unsigned long state) 1712 { 1713 struct etnaviv_gpu *gpu = cdev->devdata; 1714 1715 mutex_lock(&gpu->lock); 1716 gpu->freq_scale = state; 1717 if (!pm_runtime_suspended(gpu->dev)) 1718 etnaviv_gpu_update_clock(gpu); 1719 mutex_unlock(&gpu->lock); 1720 1721 return 0; 1722 } 1723 1724 static const struct thermal_cooling_device_ops cooling_ops = { 1725 .get_max_state = etnaviv_gpu_cooling_get_max_state, 1726 .get_cur_state = etnaviv_gpu_cooling_get_cur_state, 1727 .set_cur_state = etnaviv_gpu_cooling_set_cur_state, 1728 }; 1729 1730 static int etnaviv_gpu_bind(struct device *dev, struct device *master, 1731 void *data) 1732 { 1733 struct drm_device *drm = data; 1734 struct etnaviv_drm_private *priv = drm->dev_private; 1735 struct etnaviv_gpu *gpu = dev_get_drvdata(dev); 1736 int ret; 1737 1738 if (IS_ENABLED(CONFIG_DRM_ETNAVIV_THERMAL)) { 1739 gpu->cooling = thermal_of_cooling_device_register(dev->of_node, 1740 (char *)dev_name(dev), gpu, &cooling_ops); 1741 if (IS_ERR(gpu->cooling)) 1742 return PTR_ERR(gpu->cooling); 1743 } 1744 1745 gpu->wq = alloc_ordered_workqueue(dev_name(dev), 0); 1746 if (!gpu->wq) { 1747 ret = -ENOMEM; 1748 goto out_thermal; 1749 } 1750 1751 ret = etnaviv_sched_init(gpu); 1752 if (ret) 1753 goto out_workqueue; 1754 1755 if (!IS_ENABLED(CONFIG_PM)) { 1756 ret = etnaviv_gpu_clk_enable(gpu); 1757 if (ret < 0) 1758 goto out_sched; 1759 } 1760 1761 gpu->drm = drm; 1762 gpu->fence_context = dma_fence_context_alloc(1); 1763 xa_init_flags(&gpu->user_fences, XA_FLAGS_ALLOC); 1764 spin_lock_init(&gpu->fence_spinlock); 1765 1766 INIT_WORK(&gpu->sync_point_work, sync_point_worker); 1767 init_waitqueue_head(&gpu->fence_event); 1768 1769 priv->gpu[priv->num_gpus++] = gpu; 1770 1771 return 0; 1772 1773 out_sched: 1774 etnaviv_sched_fini(gpu); 1775 1776 out_workqueue: 1777 destroy_workqueue(gpu->wq); 1778 1779 out_thermal: 1780 if (IS_ENABLED(CONFIG_DRM_ETNAVIV_THERMAL)) 1781 thermal_cooling_device_unregister(gpu->cooling); 1782 1783 return ret; 1784 } 1785 1786 static void etnaviv_gpu_unbind(struct device *dev, struct device *master, 1787 void *data) 1788 { 1789 struct etnaviv_gpu *gpu = dev_get_drvdata(dev); 1790 1791 DBG("%s", dev_name(gpu->dev)); 1792 1793 destroy_workqueue(gpu->wq); 1794 1795 etnaviv_sched_fini(gpu); 1796 1797 if (IS_ENABLED(CONFIG_PM)) { 1798 pm_runtime_get_sync(gpu->dev); 1799 pm_runtime_put_sync_suspend(gpu->dev); 1800 } else { 1801 etnaviv_gpu_hw_suspend(gpu); 1802 etnaviv_gpu_clk_disable(gpu); 1803 } 1804 1805 if (gpu->mmu_context) 1806 etnaviv_iommu_context_put(gpu->mmu_context); 1807 1808 etnaviv_cmdbuf_free(&gpu->buffer); 1809 etnaviv_iommu_global_fini(gpu); 1810 1811 gpu->drm = NULL; 1812 xa_destroy(&gpu->user_fences); 1813 1814 if (IS_ENABLED(CONFIG_DRM_ETNAVIV_THERMAL)) 1815 thermal_cooling_device_unregister(gpu->cooling); 1816 gpu->cooling = NULL; 1817 } 1818 1819 static const struct component_ops gpu_ops = { 1820 .bind = etnaviv_gpu_bind, 1821 .unbind = etnaviv_gpu_unbind, 1822 }; 1823 1824 static const struct of_device_id etnaviv_gpu_match[] = { 1825 { 1826 .compatible = "vivante,gc" 1827 }, 1828 { /* sentinel */ } 1829 }; 1830 MODULE_DEVICE_TABLE(of, etnaviv_gpu_match); 1831 1832 static int etnaviv_gpu_platform_probe(struct platform_device *pdev) 1833 { 1834 struct device *dev = &pdev->dev; 1835 struct etnaviv_gpu *gpu; 1836 int err; 1837 1838 gpu = devm_kzalloc(dev, sizeof(*gpu), GFP_KERNEL); 1839 if (!gpu) 1840 return -ENOMEM; 1841 1842 gpu->dev = &pdev->dev; 1843 mutex_init(&gpu->lock); 1844 mutex_init(&gpu->sched_lock); 1845 1846 /* Map registers: */ 1847 gpu->mmio = devm_platform_ioremap_resource(pdev, 0); 1848 if (IS_ERR(gpu->mmio)) 1849 return PTR_ERR(gpu->mmio); 1850 1851 /* Get Interrupt: */ 1852 gpu->irq = platform_get_irq(pdev, 0); 1853 if (gpu->irq < 0) 1854 return gpu->irq; 1855 1856 err = devm_request_irq(&pdev->dev, gpu->irq, irq_handler, 0, 1857 dev_name(gpu->dev), gpu); 1858 if (err) { 1859 dev_err(dev, "failed to request IRQ%u: %d\n", gpu->irq, err); 1860 return err; 1861 } 1862 1863 /* Get Clocks: */ 1864 gpu->clk_reg = devm_clk_get_optional(&pdev->dev, "reg"); 1865 DBG("clk_reg: %p", gpu->clk_reg); 1866 if (IS_ERR(gpu->clk_reg)) 1867 return PTR_ERR(gpu->clk_reg); 1868 1869 gpu->clk_bus = devm_clk_get_optional(&pdev->dev, "bus"); 1870 DBG("clk_bus: %p", gpu->clk_bus); 1871 if (IS_ERR(gpu->clk_bus)) 1872 return PTR_ERR(gpu->clk_bus); 1873 1874 gpu->clk_core = devm_clk_get(&pdev->dev, "core"); 1875 DBG("clk_core: %p", gpu->clk_core); 1876 if (IS_ERR(gpu->clk_core)) 1877 return PTR_ERR(gpu->clk_core); 1878 gpu->base_rate_core = clk_get_rate(gpu->clk_core); 1879 1880 gpu->clk_shader = devm_clk_get_optional(&pdev->dev, "shader"); 1881 DBG("clk_shader: %p", gpu->clk_shader); 1882 if (IS_ERR(gpu->clk_shader)) 1883 return PTR_ERR(gpu->clk_shader); 1884 gpu->base_rate_shader = clk_get_rate(gpu->clk_shader); 1885 1886 /* TODO: figure out max mapped size */ 1887 dev_set_drvdata(dev, gpu); 1888 1889 /* 1890 * We treat the device as initially suspended. The runtime PM 1891 * autosuspend delay is rather arbitary: no measurements have 1892 * yet been performed to determine an appropriate value. 1893 */ 1894 pm_runtime_use_autosuspend(gpu->dev); 1895 pm_runtime_set_autosuspend_delay(gpu->dev, 200); 1896 pm_runtime_enable(gpu->dev); 1897 1898 err = component_add(&pdev->dev, &gpu_ops); 1899 if (err < 0) { 1900 dev_err(&pdev->dev, "failed to register component: %d\n", err); 1901 return err; 1902 } 1903 1904 return 0; 1905 } 1906 1907 static int etnaviv_gpu_platform_remove(struct platform_device *pdev) 1908 { 1909 component_del(&pdev->dev, &gpu_ops); 1910 pm_runtime_disable(&pdev->dev); 1911 return 0; 1912 } 1913 1914 static int etnaviv_gpu_rpm_suspend(struct device *dev) 1915 { 1916 struct etnaviv_gpu *gpu = dev_get_drvdata(dev); 1917 u32 idle, mask; 1918 1919 /* If there are any jobs in the HW queue, we're not idle */ 1920 if (atomic_read(&gpu->sched.hw_rq_count)) 1921 return -EBUSY; 1922 1923 /* Check whether the hardware (except FE and MC) is idle */ 1924 mask = gpu->idle_mask & ~(VIVS_HI_IDLE_STATE_FE | 1925 VIVS_HI_IDLE_STATE_MC); 1926 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE) & mask; 1927 if (idle != mask) { 1928 dev_warn_ratelimited(dev, "GPU not yet idle, mask: 0x%08x\n", 1929 idle); 1930 return -EBUSY; 1931 } 1932 1933 etnaviv_gpu_hw_suspend(gpu); 1934 1935 gpu->state = ETNA_GPU_STATE_IDENTIFIED; 1936 1937 return etnaviv_gpu_clk_disable(gpu); 1938 } 1939 1940 static int etnaviv_gpu_rpm_resume(struct device *dev) 1941 { 1942 struct etnaviv_gpu *gpu = dev_get_drvdata(dev); 1943 int ret; 1944 1945 ret = etnaviv_gpu_clk_enable(gpu); 1946 if (ret) 1947 return ret; 1948 1949 /* Re-initialise the basic hardware state */ 1950 if (gpu->state == ETNA_GPU_STATE_IDENTIFIED) { 1951 ret = etnaviv_gpu_hw_resume(gpu); 1952 if (ret) { 1953 etnaviv_gpu_clk_disable(gpu); 1954 return ret; 1955 } 1956 } 1957 1958 return 0; 1959 } 1960 1961 static const struct dev_pm_ops etnaviv_gpu_pm_ops = { 1962 RUNTIME_PM_OPS(etnaviv_gpu_rpm_suspend, etnaviv_gpu_rpm_resume, NULL) 1963 }; 1964 1965 struct platform_driver etnaviv_gpu_driver = { 1966 .driver = { 1967 .name = "etnaviv-gpu", 1968 .owner = THIS_MODULE, 1969 .pm = pm_ptr(&etnaviv_gpu_pm_ops), 1970 .of_match_table = etnaviv_gpu_match, 1971 }, 1972 .probe = etnaviv_gpu_platform_probe, 1973 .remove = etnaviv_gpu_platform_remove, 1974 .id_table = gpu_ids, 1975 }; 1976