1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2013 Red Hat 4 * Author: Rob Clark <robdclark@gmail.com> 5 */ 6 7 #include "drm/drm_drv.h" 8 9 #include "msm_gpu.h" 10 #include "msm_gem.h" 11 #include "msm_mmu.h" 12 #include "msm_fence.h" 13 #include "msm_gpu_trace.h" 14 #include "adreno/adreno_gpu.h" 15 16 #include <generated/utsrelease.h> 17 #include <linux/string_helpers.h> 18 #include <linux/devcoredump.h> 19 #include <linux/reset.h> 20 #include <linux/sched/task.h> 21 22 /* 23 * Power Management: 24 */ 25 26 static int enable_pwrrail(struct msm_gpu *gpu) 27 { 28 struct drm_device *dev = gpu->dev; 29 int ret = 0; 30 31 if (gpu->gpu_reg) { 32 ret = regulator_enable(gpu->gpu_reg); 33 if (ret) { 34 DRM_DEV_ERROR(dev->dev, "failed to enable 'gpu_reg': %d\n", ret); 35 return ret; 36 } 37 } 38 39 if (gpu->gpu_cx) { 40 ret = regulator_enable(gpu->gpu_cx); 41 if (ret) { 42 DRM_DEV_ERROR(dev->dev, "failed to enable 'gpu_cx': %d\n", ret); 43 return ret; 44 } 45 } 46 47 return 0; 48 } 49 50 static int disable_pwrrail(struct msm_gpu *gpu) 51 { 52 if (gpu->gpu_cx) 53 regulator_disable(gpu->gpu_cx); 54 if (gpu->gpu_reg) 55 regulator_disable(gpu->gpu_reg); 56 return 0; 57 } 58 59 static int enable_clk(struct msm_gpu *gpu) 60 { 61 if (gpu->core_clk && gpu->fast_rate) 62 clk_set_rate(gpu->core_clk, gpu->fast_rate); 63 64 /* Set the RBBM timer rate to 19.2Mhz */ 65 if (gpu->rbbmtimer_clk) 66 clk_set_rate(gpu->rbbmtimer_clk, 19200000); 67 68 return clk_bulk_prepare_enable(gpu->nr_clocks, gpu->grp_clks); 69 } 70 71 static int disable_clk(struct msm_gpu *gpu) 72 { 73 clk_bulk_disable_unprepare(gpu->nr_clocks, gpu->grp_clks); 74 75 /* 76 * Set the clock to a deliberately low rate. On older targets the clock 77 * speed had to be non zero to avoid problems. On newer targets this 78 * will be rounded down to zero anyway so it all works out. 79 */ 80 if (gpu->core_clk) 81 clk_set_rate(gpu->core_clk, 27000000); 82 83 if (gpu->rbbmtimer_clk) 84 clk_set_rate(gpu->rbbmtimer_clk, 0); 85 86 return 0; 87 } 88 89 static int enable_axi(struct msm_gpu *gpu) 90 { 91 return clk_prepare_enable(gpu->ebi1_clk); 92 } 93 94 static int disable_axi(struct msm_gpu *gpu) 95 { 96 clk_disable_unprepare(gpu->ebi1_clk); 97 return 0; 98 } 99 100 int msm_gpu_pm_resume(struct msm_gpu *gpu) 101 { 102 int ret; 103 104 DBG("%s", gpu->name); 105 trace_msm_gpu_resume(0); 106 107 ret = enable_pwrrail(gpu); 108 if (ret) 109 return ret; 110 111 ret = enable_clk(gpu); 112 if (ret) 113 return ret; 114 115 ret = enable_axi(gpu); 116 if (ret) 117 return ret; 118 119 msm_devfreq_resume(gpu); 120 121 gpu->needs_hw_init = true; 122 123 return 0; 124 } 125 126 int msm_gpu_pm_suspend(struct msm_gpu *gpu) 127 { 128 int ret; 129 130 DBG("%s", gpu->name); 131 trace_msm_gpu_suspend(0); 132 133 msm_devfreq_suspend(gpu); 134 135 ret = disable_axi(gpu); 136 if (ret) 137 return ret; 138 139 ret = disable_clk(gpu); 140 if (ret) 141 return ret; 142 143 ret = disable_pwrrail(gpu); 144 if (ret) 145 return ret; 146 147 gpu->suspend_count++; 148 149 return 0; 150 } 151 152 void msm_gpu_show_fdinfo(struct msm_gpu *gpu, struct msm_file_private *ctx, 153 struct drm_printer *p) 154 { 155 drm_printf(p, "drm-driver:\t%s\n", gpu->dev->driver->name); 156 drm_printf(p, "drm-client-id:\t%u\n", ctx->seqno); 157 drm_printf(p, "drm-engine-gpu:\t%llu ns\n", ctx->elapsed_ns); 158 drm_printf(p, "drm-cycles-gpu:\t%llu\n", ctx->cycles); 159 drm_printf(p, "drm-maxfreq-gpu:\t%u Hz\n", gpu->fast_rate); 160 } 161 162 int msm_gpu_hw_init(struct msm_gpu *gpu) 163 { 164 int ret; 165 166 WARN_ON(!mutex_is_locked(&gpu->lock)); 167 168 if (!gpu->needs_hw_init) 169 return 0; 170 171 disable_irq(gpu->irq); 172 ret = gpu->funcs->hw_init(gpu); 173 if (!ret) 174 gpu->needs_hw_init = false; 175 enable_irq(gpu->irq); 176 177 return ret; 178 } 179 180 #ifdef CONFIG_DEV_COREDUMP 181 static ssize_t msm_gpu_devcoredump_read(char *buffer, loff_t offset, 182 size_t count, void *data, size_t datalen) 183 { 184 struct msm_gpu *gpu = data; 185 struct drm_print_iterator iter; 186 struct drm_printer p; 187 struct msm_gpu_state *state; 188 189 state = msm_gpu_crashstate_get(gpu); 190 if (!state) 191 return 0; 192 193 iter.data = buffer; 194 iter.offset = 0; 195 iter.start = offset; 196 iter.remain = count; 197 198 p = drm_coredump_printer(&iter); 199 200 drm_printf(&p, "---\n"); 201 drm_printf(&p, "kernel: " UTS_RELEASE "\n"); 202 drm_printf(&p, "module: " KBUILD_MODNAME "\n"); 203 drm_printf(&p, "time: %lld.%09ld\n", 204 state->time.tv_sec, state->time.tv_nsec); 205 if (state->comm) 206 drm_printf(&p, "comm: %s\n", state->comm); 207 if (state->cmd) 208 drm_printf(&p, "cmdline: %s\n", state->cmd); 209 210 gpu->funcs->show(gpu, state, &p); 211 212 msm_gpu_crashstate_put(gpu); 213 214 return count - iter.remain; 215 } 216 217 static void msm_gpu_devcoredump_free(void *data) 218 { 219 struct msm_gpu *gpu = data; 220 221 msm_gpu_crashstate_put(gpu); 222 } 223 224 static void msm_gpu_crashstate_get_bo(struct msm_gpu_state *state, 225 struct msm_gem_object *obj, u64 iova, bool full) 226 { 227 struct msm_gpu_state_bo *state_bo = &state->bos[state->nr_bos]; 228 229 /* Don't record write only objects */ 230 state_bo->size = obj->base.size; 231 state_bo->iova = iova; 232 233 BUILD_BUG_ON(sizeof(state_bo->name) != sizeof(obj->name)); 234 235 memcpy(state_bo->name, obj->name, sizeof(state_bo->name)); 236 237 if (full) { 238 void *ptr; 239 240 state_bo->data = kvmalloc(obj->base.size, GFP_KERNEL); 241 if (!state_bo->data) 242 goto out; 243 244 msm_gem_lock(&obj->base); 245 ptr = msm_gem_get_vaddr_active(&obj->base); 246 msm_gem_unlock(&obj->base); 247 if (IS_ERR(ptr)) { 248 kvfree(state_bo->data); 249 state_bo->data = NULL; 250 goto out; 251 } 252 253 memcpy(state_bo->data, ptr, obj->base.size); 254 msm_gem_put_vaddr(&obj->base); 255 } 256 out: 257 state->nr_bos++; 258 } 259 260 static void msm_gpu_crashstate_capture(struct msm_gpu *gpu, 261 struct msm_gem_submit *submit, char *comm, char *cmd) 262 { 263 struct msm_gpu_state *state; 264 265 /* Check if the target supports capturing crash state */ 266 if (!gpu->funcs->gpu_state_get) 267 return; 268 269 /* Only save one crash state at a time */ 270 if (gpu->crashstate) 271 return; 272 273 state = gpu->funcs->gpu_state_get(gpu); 274 if (IS_ERR_OR_NULL(state)) 275 return; 276 277 /* Fill in the additional crash state information */ 278 state->comm = kstrdup(comm, GFP_KERNEL); 279 state->cmd = kstrdup(cmd, GFP_KERNEL); 280 state->fault_info = gpu->fault_info; 281 282 if (submit) { 283 int i; 284 285 state->bos = kcalloc(submit->nr_bos, 286 sizeof(struct msm_gpu_state_bo), GFP_KERNEL); 287 288 for (i = 0; state->bos && i < submit->nr_bos; i++) { 289 msm_gpu_crashstate_get_bo(state, submit->bos[i].obj, 290 submit->bos[i].iova, 291 should_dump(submit, i)); 292 } 293 } 294 295 /* Set the active crash state to be dumped on failure */ 296 gpu->crashstate = state; 297 298 /* FIXME: Release the crashstate if this errors out? */ 299 dev_coredumpm(gpu->dev->dev, THIS_MODULE, gpu, 0, GFP_KERNEL, 300 msm_gpu_devcoredump_read, msm_gpu_devcoredump_free); 301 } 302 #else 303 static void msm_gpu_crashstate_capture(struct msm_gpu *gpu, 304 struct msm_gem_submit *submit, char *comm, char *cmd) 305 { 306 } 307 #endif 308 309 /* 310 * Hangcheck detection for locked gpu: 311 */ 312 313 static struct msm_gem_submit * 314 find_submit(struct msm_ringbuffer *ring, uint32_t fence) 315 { 316 struct msm_gem_submit *submit; 317 unsigned long flags; 318 319 spin_lock_irqsave(&ring->submit_lock, flags); 320 list_for_each_entry(submit, &ring->submits, node) { 321 if (submit->seqno == fence) { 322 spin_unlock_irqrestore(&ring->submit_lock, flags); 323 return submit; 324 } 325 } 326 spin_unlock_irqrestore(&ring->submit_lock, flags); 327 328 return NULL; 329 } 330 331 static void retire_submits(struct msm_gpu *gpu); 332 333 static void get_comm_cmdline(struct msm_gem_submit *submit, char **comm, char **cmd) 334 { 335 struct msm_file_private *ctx = submit->queue->ctx; 336 struct task_struct *task; 337 338 /* Note that kstrdup will return NULL if argument is NULL: */ 339 *comm = kstrdup(ctx->comm, GFP_KERNEL); 340 *cmd = kstrdup(ctx->cmdline, GFP_KERNEL); 341 342 task = get_pid_task(submit->pid, PIDTYPE_PID); 343 if (!task) 344 return; 345 346 if (!*comm) 347 *comm = kstrdup(task->comm, GFP_KERNEL); 348 349 if (!*cmd) 350 *cmd = kstrdup_quotable_cmdline(task, GFP_KERNEL); 351 352 put_task_struct(task); 353 } 354 355 static void recover_worker(struct kthread_work *work) 356 { 357 struct msm_gpu *gpu = container_of(work, struct msm_gpu, recover_work); 358 struct drm_device *dev = gpu->dev; 359 struct msm_drm_private *priv = dev->dev_private; 360 struct msm_gem_submit *submit; 361 struct msm_ringbuffer *cur_ring = gpu->funcs->active_ring(gpu); 362 char *comm = NULL, *cmd = NULL; 363 int i; 364 365 mutex_lock(&gpu->lock); 366 367 DRM_DEV_ERROR(dev->dev, "%s: hangcheck recover!\n", gpu->name); 368 369 submit = find_submit(cur_ring, cur_ring->memptrs->fence + 1); 370 if (submit) { 371 /* Increment the fault counts */ 372 submit->queue->faults++; 373 if (submit->aspace) 374 submit->aspace->faults++; 375 376 get_comm_cmdline(submit, &comm, &cmd); 377 378 if (comm && cmd) { 379 DRM_DEV_ERROR(dev->dev, "%s: offending task: %s (%s)\n", 380 gpu->name, comm, cmd); 381 382 msm_rd_dump_submit(priv->hangrd, submit, 383 "offending task: %s (%s)", comm, cmd); 384 } else { 385 msm_rd_dump_submit(priv->hangrd, submit, NULL); 386 } 387 } else { 388 /* 389 * We couldn't attribute this fault to any particular context, 390 * so increment the global fault count instead. 391 */ 392 gpu->global_faults++; 393 } 394 395 /* Record the crash state */ 396 pm_runtime_get_sync(&gpu->pdev->dev); 397 msm_gpu_crashstate_capture(gpu, submit, comm, cmd); 398 399 kfree(cmd); 400 kfree(comm); 401 402 /* 403 * Update all the rings with the latest and greatest fence.. this 404 * needs to happen after msm_rd_dump_submit() to ensure that the 405 * bo's referenced by the offending submit are still around. 406 */ 407 for (i = 0; i < gpu->nr_rings; i++) { 408 struct msm_ringbuffer *ring = gpu->rb[i]; 409 410 uint32_t fence = ring->memptrs->fence; 411 412 /* 413 * For the current (faulting?) ring/submit advance the fence by 414 * one more to clear the faulting submit 415 */ 416 if (ring == cur_ring) 417 ring->memptrs->fence = ++fence; 418 419 msm_update_fence(ring->fctx, fence); 420 } 421 422 if (msm_gpu_active(gpu)) { 423 /* retire completed submits, plus the one that hung: */ 424 retire_submits(gpu); 425 426 gpu->funcs->recover(gpu); 427 428 /* 429 * Replay all remaining submits starting with highest priority 430 * ring 431 */ 432 for (i = 0; i < gpu->nr_rings; i++) { 433 struct msm_ringbuffer *ring = gpu->rb[i]; 434 unsigned long flags; 435 436 spin_lock_irqsave(&ring->submit_lock, flags); 437 list_for_each_entry(submit, &ring->submits, node) 438 gpu->funcs->submit(gpu, submit); 439 spin_unlock_irqrestore(&ring->submit_lock, flags); 440 } 441 } 442 443 pm_runtime_put(&gpu->pdev->dev); 444 445 mutex_unlock(&gpu->lock); 446 447 msm_gpu_retire(gpu); 448 } 449 450 static void fault_worker(struct kthread_work *work) 451 { 452 struct msm_gpu *gpu = container_of(work, struct msm_gpu, fault_work); 453 struct msm_gem_submit *submit; 454 struct msm_ringbuffer *cur_ring = gpu->funcs->active_ring(gpu); 455 char *comm = NULL, *cmd = NULL; 456 457 mutex_lock(&gpu->lock); 458 459 submit = find_submit(cur_ring, cur_ring->memptrs->fence + 1); 460 if (submit && submit->fault_dumped) 461 goto resume_smmu; 462 463 if (submit) { 464 get_comm_cmdline(submit, &comm, &cmd); 465 466 /* 467 * When we get GPU iova faults, we can get 1000s of them, 468 * but we really only want to log the first one. 469 */ 470 submit->fault_dumped = true; 471 } 472 473 /* Record the crash state */ 474 pm_runtime_get_sync(&gpu->pdev->dev); 475 msm_gpu_crashstate_capture(gpu, submit, comm, cmd); 476 pm_runtime_put_sync(&gpu->pdev->dev); 477 478 kfree(cmd); 479 kfree(comm); 480 481 resume_smmu: 482 memset(&gpu->fault_info, 0, sizeof(gpu->fault_info)); 483 gpu->aspace->mmu->funcs->resume_translation(gpu->aspace->mmu); 484 485 mutex_unlock(&gpu->lock); 486 } 487 488 static void hangcheck_timer_reset(struct msm_gpu *gpu) 489 { 490 struct msm_drm_private *priv = gpu->dev->dev_private; 491 mod_timer(&gpu->hangcheck_timer, 492 round_jiffies_up(jiffies + msecs_to_jiffies(priv->hangcheck_period))); 493 } 494 495 static bool made_progress(struct msm_gpu *gpu, struct msm_ringbuffer *ring) 496 { 497 if (ring->hangcheck_progress_retries >= DRM_MSM_HANGCHECK_PROGRESS_RETRIES) 498 return false; 499 500 if (!gpu->funcs->progress) 501 return false; 502 503 if (!gpu->funcs->progress(gpu, ring)) 504 return false; 505 506 ring->hangcheck_progress_retries++; 507 return true; 508 } 509 510 static void hangcheck_handler(struct timer_list *t) 511 { 512 struct msm_gpu *gpu = from_timer(gpu, t, hangcheck_timer); 513 struct drm_device *dev = gpu->dev; 514 struct msm_ringbuffer *ring = gpu->funcs->active_ring(gpu); 515 uint32_t fence = ring->memptrs->fence; 516 517 if (fence != ring->hangcheck_fence) { 518 /* some progress has been made.. ya! */ 519 ring->hangcheck_fence = fence; 520 ring->hangcheck_progress_retries = 0; 521 } else if (fence_before(fence, ring->fctx->last_fence) && 522 !made_progress(gpu, ring)) { 523 /* no progress and not done.. hung! */ 524 ring->hangcheck_fence = fence; 525 ring->hangcheck_progress_retries = 0; 526 DRM_DEV_ERROR(dev->dev, "%s: hangcheck detected gpu lockup rb %d!\n", 527 gpu->name, ring->id); 528 DRM_DEV_ERROR(dev->dev, "%s: completed fence: %u\n", 529 gpu->name, fence); 530 DRM_DEV_ERROR(dev->dev, "%s: submitted fence: %u\n", 531 gpu->name, ring->fctx->last_fence); 532 533 kthread_queue_work(gpu->worker, &gpu->recover_work); 534 } 535 536 /* if still more pending work, reset the hangcheck timer: */ 537 if (fence_after(ring->fctx->last_fence, ring->hangcheck_fence)) 538 hangcheck_timer_reset(gpu); 539 540 /* workaround for missing irq: */ 541 msm_gpu_retire(gpu); 542 } 543 544 /* 545 * Performance Counters: 546 */ 547 548 /* called under perf_lock */ 549 static int update_hw_cntrs(struct msm_gpu *gpu, uint32_t ncntrs, uint32_t *cntrs) 550 { 551 uint32_t current_cntrs[ARRAY_SIZE(gpu->last_cntrs)]; 552 int i, n = min(ncntrs, gpu->num_perfcntrs); 553 554 /* read current values: */ 555 for (i = 0; i < gpu->num_perfcntrs; i++) 556 current_cntrs[i] = gpu_read(gpu, gpu->perfcntrs[i].sample_reg); 557 558 /* update cntrs: */ 559 for (i = 0; i < n; i++) 560 cntrs[i] = current_cntrs[i] - gpu->last_cntrs[i]; 561 562 /* save current values: */ 563 for (i = 0; i < gpu->num_perfcntrs; i++) 564 gpu->last_cntrs[i] = current_cntrs[i]; 565 566 return n; 567 } 568 569 static void update_sw_cntrs(struct msm_gpu *gpu) 570 { 571 ktime_t time; 572 uint32_t elapsed; 573 unsigned long flags; 574 575 spin_lock_irqsave(&gpu->perf_lock, flags); 576 if (!gpu->perfcntr_active) 577 goto out; 578 579 time = ktime_get(); 580 elapsed = ktime_to_us(ktime_sub(time, gpu->last_sample.time)); 581 582 gpu->totaltime += elapsed; 583 if (gpu->last_sample.active) 584 gpu->activetime += elapsed; 585 586 gpu->last_sample.active = msm_gpu_active(gpu); 587 gpu->last_sample.time = time; 588 589 out: 590 spin_unlock_irqrestore(&gpu->perf_lock, flags); 591 } 592 593 void msm_gpu_perfcntr_start(struct msm_gpu *gpu) 594 { 595 unsigned long flags; 596 597 pm_runtime_get_sync(&gpu->pdev->dev); 598 599 spin_lock_irqsave(&gpu->perf_lock, flags); 600 /* we could dynamically enable/disable perfcntr registers too.. */ 601 gpu->last_sample.active = msm_gpu_active(gpu); 602 gpu->last_sample.time = ktime_get(); 603 gpu->activetime = gpu->totaltime = 0; 604 gpu->perfcntr_active = true; 605 update_hw_cntrs(gpu, 0, NULL); 606 spin_unlock_irqrestore(&gpu->perf_lock, flags); 607 } 608 609 void msm_gpu_perfcntr_stop(struct msm_gpu *gpu) 610 { 611 gpu->perfcntr_active = false; 612 pm_runtime_put_sync(&gpu->pdev->dev); 613 } 614 615 /* returns -errno or # of cntrs sampled */ 616 int msm_gpu_perfcntr_sample(struct msm_gpu *gpu, uint32_t *activetime, 617 uint32_t *totaltime, uint32_t ncntrs, uint32_t *cntrs) 618 { 619 unsigned long flags; 620 int ret; 621 622 spin_lock_irqsave(&gpu->perf_lock, flags); 623 624 if (!gpu->perfcntr_active) { 625 ret = -EINVAL; 626 goto out; 627 } 628 629 *activetime = gpu->activetime; 630 *totaltime = gpu->totaltime; 631 632 gpu->activetime = gpu->totaltime = 0; 633 634 ret = update_hw_cntrs(gpu, ncntrs, cntrs); 635 636 out: 637 spin_unlock_irqrestore(&gpu->perf_lock, flags); 638 639 return ret; 640 } 641 642 /* 643 * Cmdstream submission/retirement: 644 */ 645 646 static void retire_submit(struct msm_gpu *gpu, struct msm_ringbuffer *ring, 647 struct msm_gem_submit *submit) 648 { 649 int index = submit->seqno % MSM_GPU_SUBMIT_STATS_COUNT; 650 volatile struct msm_gpu_submit_stats *stats; 651 u64 elapsed, clock = 0, cycles; 652 unsigned long flags; 653 654 stats = &ring->memptrs->stats[index]; 655 /* Convert 19.2Mhz alwayson ticks to nanoseconds for elapsed time */ 656 elapsed = (stats->alwayson_end - stats->alwayson_start) * 10000; 657 do_div(elapsed, 192); 658 659 cycles = stats->cpcycles_end - stats->cpcycles_start; 660 661 /* Calculate the clock frequency from the number of CP cycles */ 662 if (elapsed) { 663 clock = cycles * 1000; 664 do_div(clock, elapsed); 665 } 666 667 submit->queue->ctx->elapsed_ns += elapsed; 668 submit->queue->ctx->cycles += cycles; 669 670 trace_msm_gpu_submit_retired(submit, elapsed, clock, 671 stats->alwayson_start, stats->alwayson_end); 672 673 msm_submit_retire(submit); 674 675 pm_runtime_mark_last_busy(&gpu->pdev->dev); 676 677 spin_lock_irqsave(&ring->submit_lock, flags); 678 list_del(&submit->node); 679 spin_unlock_irqrestore(&ring->submit_lock, flags); 680 681 /* Update devfreq on transition from active->idle: */ 682 mutex_lock(&gpu->active_lock); 683 gpu->active_submits--; 684 WARN_ON(gpu->active_submits < 0); 685 if (!gpu->active_submits) { 686 msm_devfreq_idle(gpu); 687 pm_runtime_put_autosuspend(&gpu->pdev->dev); 688 } 689 690 mutex_unlock(&gpu->active_lock); 691 692 msm_gem_submit_put(submit); 693 } 694 695 static void retire_submits(struct msm_gpu *gpu) 696 { 697 int i; 698 699 /* Retire the commits starting with highest priority */ 700 for (i = 0; i < gpu->nr_rings; i++) { 701 struct msm_ringbuffer *ring = gpu->rb[i]; 702 703 while (true) { 704 struct msm_gem_submit *submit = NULL; 705 unsigned long flags; 706 707 spin_lock_irqsave(&ring->submit_lock, flags); 708 submit = list_first_entry_or_null(&ring->submits, 709 struct msm_gem_submit, node); 710 spin_unlock_irqrestore(&ring->submit_lock, flags); 711 712 /* 713 * If no submit, we are done. If submit->fence hasn't 714 * been signalled, then later submits are not signalled 715 * either, so we are also done. 716 */ 717 if (submit && dma_fence_is_signaled(submit->hw_fence)) { 718 retire_submit(gpu, ring, submit); 719 } else { 720 break; 721 } 722 } 723 } 724 725 wake_up_all(&gpu->retire_event); 726 } 727 728 static void retire_worker(struct kthread_work *work) 729 { 730 struct msm_gpu *gpu = container_of(work, struct msm_gpu, retire_work); 731 732 retire_submits(gpu); 733 } 734 735 /* call from irq handler to schedule work to retire bo's */ 736 void msm_gpu_retire(struct msm_gpu *gpu) 737 { 738 int i; 739 740 for (i = 0; i < gpu->nr_rings; i++) 741 msm_update_fence(gpu->rb[i]->fctx, gpu->rb[i]->memptrs->fence); 742 743 kthread_queue_work(gpu->worker, &gpu->retire_work); 744 update_sw_cntrs(gpu); 745 } 746 747 /* add bo's to gpu's ring, and kick gpu: */ 748 void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit) 749 { 750 struct drm_device *dev = gpu->dev; 751 struct msm_drm_private *priv = dev->dev_private; 752 struct msm_ringbuffer *ring = submit->ring; 753 unsigned long flags; 754 755 WARN_ON(!mutex_is_locked(&gpu->lock)); 756 757 pm_runtime_get_sync(&gpu->pdev->dev); 758 759 msm_gpu_hw_init(gpu); 760 761 submit->seqno = submit->hw_fence->seqno; 762 763 msm_rd_dump_submit(priv->rd, submit, NULL); 764 765 update_sw_cntrs(gpu); 766 767 /* 768 * ring->submits holds a ref to the submit, to deal with the case 769 * that a submit completes before msm_ioctl_gem_submit() returns. 770 */ 771 msm_gem_submit_get(submit); 772 773 spin_lock_irqsave(&ring->submit_lock, flags); 774 list_add_tail(&submit->node, &ring->submits); 775 spin_unlock_irqrestore(&ring->submit_lock, flags); 776 777 /* Update devfreq on transition from idle->active: */ 778 mutex_lock(&gpu->active_lock); 779 if (!gpu->active_submits) { 780 pm_runtime_get(&gpu->pdev->dev); 781 msm_devfreq_active(gpu); 782 } 783 gpu->active_submits++; 784 mutex_unlock(&gpu->active_lock); 785 786 gpu->funcs->submit(gpu, submit); 787 gpu->cur_ctx_seqno = submit->queue->ctx->seqno; 788 789 pm_runtime_put(&gpu->pdev->dev); 790 hangcheck_timer_reset(gpu); 791 } 792 793 /* 794 * Init/Cleanup: 795 */ 796 797 static irqreturn_t irq_handler(int irq, void *data) 798 { 799 struct msm_gpu *gpu = data; 800 return gpu->funcs->irq(gpu); 801 } 802 803 static int get_clocks(struct platform_device *pdev, struct msm_gpu *gpu) 804 { 805 int ret = devm_clk_bulk_get_all(&pdev->dev, &gpu->grp_clks); 806 807 if (ret < 1) { 808 gpu->nr_clocks = 0; 809 return ret; 810 } 811 812 gpu->nr_clocks = ret; 813 814 gpu->core_clk = msm_clk_bulk_get_clock(gpu->grp_clks, 815 gpu->nr_clocks, "core"); 816 817 gpu->rbbmtimer_clk = msm_clk_bulk_get_clock(gpu->grp_clks, 818 gpu->nr_clocks, "rbbmtimer"); 819 820 return 0; 821 } 822 823 /* Return a new address space for a msm_drm_private instance */ 824 struct msm_gem_address_space * 825 msm_gpu_create_private_address_space(struct msm_gpu *gpu, struct task_struct *task) 826 { 827 struct msm_gem_address_space *aspace = NULL; 828 if (!gpu) 829 return NULL; 830 831 /* 832 * If the target doesn't support private address spaces then return 833 * the global one 834 */ 835 if (gpu->funcs->create_private_address_space) { 836 aspace = gpu->funcs->create_private_address_space(gpu); 837 if (!IS_ERR(aspace)) 838 aspace->pid = get_pid(task_pid(task)); 839 } 840 841 if (IS_ERR_OR_NULL(aspace)) 842 aspace = msm_gem_address_space_get(gpu->aspace); 843 844 return aspace; 845 } 846 847 int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev, 848 struct msm_gpu *gpu, const struct msm_gpu_funcs *funcs, 849 const char *name, struct msm_gpu_config *config) 850 { 851 struct msm_drm_private *priv = drm->dev_private; 852 int i, ret, nr_rings = config->nr_rings; 853 void *memptrs; 854 uint64_t memptrs_iova; 855 856 if (WARN_ON(gpu->num_perfcntrs > ARRAY_SIZE(gpu->last_cntrs))) 857 gpu->num_perfcntrs = ARRAY_SIZE(gpu->last_cntrs); 858 859 gpu->dev = drm; 860 gpu->funcs = funcs; 861 gpu->name = name; 862 863 gpu->worker = kthread_create_worker(0, "gpu-worker"); 864 if (IS_ERR(gpu->worker)) { 865 ret = PTR_ERR(gpu->worker); 866 gpu->worker = NULL; 867 goto fail; 868 } 869 870 sched_set_fifo_low(gpu->worker->task); 871 872 mutex_init(&gpu->active_lock); 873 mutex_init(&gpu->lock); 874 init_waitqueue_head(&gpu->retire_event); 875 kthread_init_work(&gpu->retire_work, retire_worker); 876 kthread_init_work(&gpu->recover_work, recover_worker); 877 kthread_init_work(&gpu->fault_work, fault_worker); 878 879 priv->hangcheck_period = DRM_MSM_HANGCHECK_DEFAULT_PERIOD; 880 881 /* 882 * If progress detection is supported, halve the hangcheck timer 883 * duration, as it takes two iterations of the hangcheck handler 884 * to detect a hang. 885 */ 886 if (funcs->progress) 887 priv->hangcheck_period /= 2; 888 889 timer_setup(&gpu->hangcheck_timer, hangcheck_handler, 0); 890 891 spin_lock_init(&gpu->perf_lock); 892 893 894 /* Map registers: */ 895 gpu->mmio = msm_ioremap(pdev, config->ioname); 896 if (IS_ERR(gpu->mmio)) { 897 ret = PTR_ERR(gpu->mmio); 898 goto fail; 899 } 900 901 /* Get Interrupt: */ 902 gpu->irq = platform_get_irq(pdev, 0); 903 if (gpu->irq < 0) { 904 ret = gpu->irq; 905 DRM_DEV_ERROR(drm->dev, "failed to get irq: %d\n", ret); 906 goto fail; 907 } 908 909 ret = devm_request_irq(&pdev->dev, gpu->irq, irq_handler, 910 IRQF_TRIGGER_HIGH, "gpu-irq", gpu); 911 if (ret) { 912 DRM_DEV_ERROR(drm->dev, "failed to request IRQ%u: %d\n", gpu->irq, ret); 913 goto fail; 914 } 915 916 ret = get_clocks(pdev, gpu); 917 if (ret) 918 goto fail; 919 920 gpu->ebi1_clk = msm_clk_get(pdev, "bus"); 921 DBG("ebi1_clk: %p", gpu->ebi1_clk); 922 if (IS_ERR(gpu->ebi1_clk)) 923 gpu->ebi1_clk = NULL; 924 925 /* Acquire regulators: */ 926 gpu->gpu_reg = devm_regulator_get(&pdev->dev, "vdd"); 927 DBG("gpu_reg: %p", gpu->gpu_reg); 928 if (IS_ERR(gpu->gpu_reg)) 929 gpu->gpu_reg = NULL; 930 931 gpu->gpu_cx = devm_regulator_get(&pdev->dev, "vddcx"); 932 DBG("gpu_cx: %p", gpu->gpu_cx); 933 if (IS_ERR(gpu->gpu_cx)) 934 gpu->gpu_cx = NULL; 935 936 gpu->cx_collapse = devm_reset_control_get_optional_exclusive(&pdev->dev, 937 "cx_collapse"); 938 939 gpu->pdev = pdev; 940 platform_set_drvdata(pdev, &gpu->adreno_smmu); 941 942 msm_devfreq_init(gpu); 943 944 945 gpu->aspace = gpu->funcs->create_address_space(gpu, pdev); 946 947 if (gpu->aspace == NULL) 948 DRM_DEV_INFO(drm->dev, "%s: no IOMMU, fallback to VRAM carveout!\n", name); 949 else if (IS_ERR(gpu->aspace)) { 950 ret = PTR_ERR(gpu->aspace); 951 goto fail; 952 } 953 954 memptrs = msm_gem_kernel_new(drm, 955 sizeof(struct msm_rbmemptrs) * nr_rings, 956 check_apriv(gpu, MSM_BO_WC), gpu->aspace, &gpu->memptrs_bo, 957 &memptrs_iova); 958 959 if (IS_ERR(memptrs)) { 960 ret = PTR_ERR(memptrs); 961 DRM_DEV_ERROR(drm->dev, "could not allocate memptrs: %d\n", ret); 962 goto fail; 963 } 964 965 msm_gem_object_set_name(gpu->memptrs_bo, "memptrs"); 966 967 if (nr_rings > ARRAY_SIZE(gpu->rb)) { 968 DRM_DEV_INFO_ONCE(drm->dev, "Only creating %zu ringbuffers\n", 969 ARRAY_SIZE(gpu->rb)); 970 nr_rings = ARRAY_SIZE(gpu->rb); 971 } 972 973 /* Create ringbuffer(s): */ 974 for (i = 0; i < nr_rings; i++) { 975 gpu->rb[i] = msm_ringbuffer_new(gpu, i, memptrs, memptrs_iova); 976 977 if (IS_ERR(gpu->rb[i])) { 978 ret = PTR_ERR(gpu->rb[i]); 979 DRM_DEV_ERROR(drm->dev, 980 "could not create ringbuffer %d: %d\n", i, ret); 981 goto fail; 982 } 983 984 memptrs += sizeof(struct msm_rbmemptrs); 985 memptrs_iova += sizeof(struct msm_rbmemptrs); 986 } 987 988 gpu->nr_rings = nr_rings; 989 990 refcount_set(&gpu->sysprof_active, 1); 991 992 return 0; 993 994 fail: 995 for (i = 0; i < ARRAY_SIZE(gpu->rb); i++) { 996 msm_ringbuffer_destroy(gpu->rb[i]); 997 gpu->rb[i] = NULL; 998 } 999 1000 msm_gem_kernel_put(gpu->memptrs_bo, gpu->aspace); 1001 1002 platform_set_drvdata(pdev, NULL); 1003 return ret; 1004 } 1005 1006 void msm_gpu_cleanup(struct msm_gpu *gpu) 1007 { 1008 int i; 1009 1010 DBG("%s", gpu->name); 1011 1012 for (i = 0; i < ARRAY_SIZE(gpu->rb); i++) { 1013 msm_ringbuffer_destroy(gpu->rb[i]); 1014 gpu->rb[i] = NULL; 1015 } 1016 1017 msm_gem_kernel_put(gpu->memptrs_bo, gpu->aspace); 1018 1019 if (!IS_ERR_OR_NULL(gpu->aspace)) { 1020 gpu->aspace->mmu->funcs->detach(gpu->aspace->mmu); 1021 msm_gem_address_space_put(gpu->aspace); 1022 } 1023 1024 if (gpu->worker) { 1025 kthread_destroy_worker(gpu->worker); 1026 } 1027 1028 msm_devfreq_cleanup(gpu); 1029 1030 platform_set_drvdata(gpu->pdev, NULL); 1031 } 1032