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