drivers/gpu/drm/msm/msm_gpu.c

   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 "msm_gpu.h"
   8 #include "msm_gem.h"
   9 #include "msm_mmu.h"
  10 #include "msm_fence.h"
  11 #include "msm_gpu_trace.h"
  12 #include "adreno/adreno_gpu.h"
  13
  14 #include <generated/utsrelease.h>
  15 #include <linux/string_helpers.h>
  16 #include <linux/devfreq.h>
  17 #include <linux/devcoredump.h>
  18 #include <linux/sched/task.h>
  19
  20 /*
  21  * Power Management:
  22  */
  23
  24 static int msm_devfreq_target(struct device *dev, unsigned long *freq,
  25                 u32 flags)
  26 {
  27         struct msm_gpu *gpu = platform_get_drvdata(to_platform_device(dev));
  28         struct dev_pm_opp *opp;
  29
  30         opp = devfreq_recommended_opp(dev, freq, flags);
  31
  32         if (IS_ERR(opp))
  33                 return PTR_ERR(opp);
  34
  35         if (gpu->funcs->gpu_set_freq)
  36                 gpu->funcs->gpu_set_freq(gpu, opp);
  37         else
  38                 clk_set_rate(gpu->core_clk, *freq);
  39
  40         dev_pm_opp_put(opp);
  41
  42         return 0;
  43 }
  44
  45 static int msm_devfreq_get_dev_status(struct device *dev,
  46                 struct devfreq_dev_status *status)
  47 {
  48         struct msm_gpu *gpu = platform_get_drvdata(to_platform_device(dev));
  49         ktime_t time;
  50
  51         if (gpu->funcs->gpu_get_freq)
  52                 status->current_frequency = gpu->funcs->gpu_get_freq(gpu);
  53         else
  54                 status->current_frequency = clk_get_rate(gpu->core_clk);
  55
  56         status->busy_time = gpu->funcs->gpu_busy(gpu);
  57
  58         time = ktime_get();
  59         status->total_time = ktime_us_delta(time, gpu->devfreq.time);
  60         gpu->devfreq.time = time;
  61
  62         return 0;
  63 }
  64
  65 static int msm_devfreq_get_cur_freq(struct device *dev, unsigned long *freq)
  66 {
  67         struct msm_gpu *gpu = platform_get_drvdata(to_platform_device(dev));
  68
  69         if (gpu->funcs->gpu_get_freq)
  70                 *freq = gpu->funcs->gpu_get_freq(gpu);
  71         else
  72                 *freq = clk_get_rate(gpu->core_clk);
  73
  74         return 0;
  75 }
  76
  77 static struct devfreq_dev_profile msm_devfreq_profile = {
  78         .polling_ms = 10,
  79         .target = msm_devfreq_target,
  80         .get_dev_status = msm_devfreq_get_dev_status,
  81         .get_cur_freq = msm_devfreq_get_cur_freq,
  82 };
  83
  84 static void msm_devfreq_init(struct msm_gpu *gpu)
  85 {
  86         /* We need target support to do devfreq */
  87         if (!gpu->funcs->gpu_busy)
  88                 return;
  89
  90         msm_devfreq_profile.initial_freq = gpu->fast_rate;
  91
  92         /*
  93          * Don't set the freq_table or max_state and let devfreq build the table
  94          * from OPP
  95          * After a deferred probe, these may have be left to non-zero values,
  96          * so set them back to zero before creating the devfreq device
  97          */
  98         msm_devfreq_profile.freq_table = NULL;
  99         msm_devfreq_profile.max_state = 0;
 100
 101         gpu->devfreq.devfreq = devm_devfreq_add_device(&gpu->pdev->dev,
 102                         &msm_devfreq_profile, DEVFREQ_GOV_SIMPLE_ONDEMAND,
 103                         NULL);
 104
 105         if (IS_ERR(gpu->devfreq.devfreq)) {
 106                 DRM_DEV_ERROR(&gpu->pdev->dev, "Couldn't initialize GPU devfreq\n");
 107                 gpu->devfreq.devfreq = NULL;
 108         }
 109
 110         devfreq_suspend_device(gpu->devfreq.devfreq);
 111 }
 112
 113 static int enable_pwrrail(struct msm_gpu *gpu)
 114 {
 115         struct drm_device *dev = gpu->dev;
 116         int ret = 0;
 117
 118         if (gpu->gpu_reg) {
 119                 ret = regulator_enable(gpu->gpu_reg);
 120                 if (ret) {
 121                         DRM_DEV_ERROR(dev->dev, "failed to enable 'gpu_reg': %d\n", ret);
 122                         return ret;
 123                 }
 124         }
 125
 126         if (gpu->gpu_cx) {
 127                 ret = regulator_enable(gpu->gpu_cx);
 128                 if (ret) {
 129                         DRM_DEV_ERROR(dev->dev, "failed to enable 'gpu_cx': %d\n", ret);
 130                         return ret;
 131                 }
 132         }
 133
 134         return 0;
 135 }
 136
 137 static int disable_pwrrail(struct msm_gpu *gpu)
 138 {
 139         if (gpu->gpu_cx)
 140                 regulator_disable(gpu->gpu_cx);
 141         if (gpu->gpu_reg)
 142                 regulator_disable(gpu->gpu_reg);
 143         return 0;
 144 }
 145
 146 static int enable_clk(struct msm_gpu *gpu)
 147 {
 148         if (gpu->core_clk && gpu->fast_rate)
 149                 clk_set_rate(gpu->core_clk, gpu->fast_rate);
 150
 151         /* Set the RBBM timer rate to 19.2Mhz */
 152         if (gpu->rbbmtimer_clk)
 153                 clk_set_rate(gpu->rbbmtimer_clk, 19200000);
 154
 155         return clk_bulk_prepare_enable(gpu->nr_clocks, gpu->grp_clks);
 156 }
 157
 158 static int disable_clk(struct msm_gpu *gpu)
 159 {
 160         clk_bulk_disable_unprepare(gpu->nr_clocks, gpu->grp_clks);
 161
 162         /*
 163          * Set the clock to a deliberately low rate. On older targets the clock
 164          * speed had to be non zero to avoid problems. On newer targets this
 165          * will be rounded down to zero anyway so it all works out.
 166          */
 167         if (gpu->core_clk)
 168                 clk_set_rate(gpu->core_clk, 27000000);
 169
 170         if (gpu->rbbmtimer_clk)
 171                 clk_set_rate(gpu->rbbmtimer_clk, 0);
 172
 173         return 0;
 174 }
 175
 176 static int enable_axi(struct msm_gpu *gpu)
 177 {
 178         if (gpu->ebi1_clk)
 179                 clk_prepare_enable(gpu->ebi1_clk);
 180         return 0;
 181 }
 182
 183 static int disable_axi(struct msm_gpu *gpu)
 184 {
 185         if (gpu->ebi1_clk)
 186                 clk_disable_unprepare(gpu->ebi1_clk);
 187         return 0;
 188 }
 189
 190 void msm_gpu_resume_devfreq(struct msm_gpu *gpu)
 191 {
 192         gpu->devfreq.busy_cycles = 0;
 193         gpu->devfreq.time = ktime_get();
 194
 195         devfreq_resume_device(gpu->devfreq.devfreq);
 196 }
 197
 198 int msm_gpu_pm_resume(struct msm_gpu *gpu)
 199 {
 200         int ret;
 201
 202         DBG("%s", gpu->name);
 203
 204         ret = enable_pwrrail(gpu);
 205         if (ret)
 206                 return ret;
 207
 208         ret = enable_clk(gpu);
 209         if (ret)
 210                 return ret;
 211
 212         ret = enable_axi(gpu);
 213         if (ret)
 214                 return ret;
 215
 216         msm_gpu_resume_devfreq(gpu);
 217
 218         gpu->needs_hw_init = true;
 219
 220         return 0;
 221 }
 222
 223 int msm_gpu_pm_suspend(struct msm_gpu *gpu)
 224 {
 225         int ret;
 226
 227         DBG("%s", gpu->name);
 228
 229         devfreq_suspend_device(gpu->devfreq.devfreq);
 230
 231         ret = disable_axi(gpu);
 232         if (ret)
 233                 return ret;
 234
 235         ret = disable_clk(gpu);
 236         if (ret)
 237                 return ret;
 238
 239         ret = disable_pwrrail(gpu);
 240         if (ret)
 241                 return ret;
 242
 243         return 0;
 244 }
 245
 246 int msm_gpu_hw_init(struct msm_gpu *gpu)
 247 {
 248         int ret;
 249
 250         WARN_ON(!mutex_is_locked(&gpu->dev->struct_mutex));
 251
 252         if (!gpu->needs_hw_init)
 253                 return 0;
 254
 255         disable_irq(gpu->irq);
 256         ret = gpu->funcs->hw_init(gpu);
 257         if (!ret)
 258                 gpu->needs_hw_init = false;
 259         enable_irq(gpu->irq);
 260
 261         return ret;
 262 }
 263
 264 #ifdef CONFIG_DEV_COREDUMP
 265 static ssize_t msm_gpu_devcoredump_read(char *buffer, loff_t offset,
 266                 size_t count, void *data, size_t datalen)
 267 {
 268         struct msm_gpu *gpu = data;
 269         struct drm_print_iterator iter;
 270         struct drm_printer p;
 271         struct msm_gpu_state *state;
 272
 273         state = msm_gpu_crashstate_get(gpu);
 274         if (!state)
 275                 return 0;
 276
 277         iter.data = buffer;
 278         iter.offset = 0;
 279         iter.start = offset;
 280         iter.remain = count;
 281
 282         p = drm_coredump_printer(&iter);
 283
 284         drm_printf(&p, "---\n");
 285         drm_printf(&p, "kernel: " UTS_RELEASE "\n");
 286         drm_printf(&p, "module: " KBUILD_MODNAME "\n");
 287         drm_printf(&p, "time: %lld.%09ld\n",
 288                 state->time.tv_sec, state->time.tv_nsec);
 289         if (state->comm)
 290                 drm_printf(&p, "comm: %s\n", state->comm);
 291         if (state->cmd)
 292                 drm_printf(&p, "cmdline: %s\n", state->cmd);
 293
 294         gpu->funcs->show(gpu, state, &p);
 295
 296         msm_gpu_crashstate_put(gpu);
 297
 298         return count - iter.remain;
 299 }
 300
 301 static void msm_gpu_devcoredump_free(void *data)
 302 {
 303         struct msm_gpu *gpu = data;
 304
 305         msm_gpu_crashstate_put(gpu);
 306 }
 307
 308 static void msm_gpu_crashstate_get_bo(struct msm_gpu_state *state,
 309                 struct msm_gem_object *obj, u64 iova, u32 flags)
 310 {
 311         struct msm_gpu_state_bo *state_bo = &state->bos[state->nr_bos];
 312
 313         /* Don't record write only objects */
 314         state_bo->size = obj->base.size;
 315         state_bo->iova = iova;
 316
 317         /* Only store data for non imported buffer objects marked for read */
 318         if ((flags & MSM_SUBMIT_BO_READ) && !obj->base.import_attach) {
 319                 void *ptr;
 320
 321                 state_bo->data = kvmalloc(obj->base.size, GFP_KERNEL);
 322                 if (!state_bo->data)
 323                         goto out;
 324
 325                 ptr = msm_gem_get_vaddr_active(&obj->base);
 326                 if (IS_ERR(ptr)) {
 327                         kvfree(state_bo->data);
 328                         state_bo->data = NULL;
 329                         goto out;
 330                 }
 331
 332                 memcpy(state_bo->data, ptr, obj->base.size);
 333                 msm_gem_put_vaddr(&obj->base);
 334         }
 335 out:
 336         state->nr_bos++;
 337 }
 338
 339 static void msm_gpu_crashstate_capture(struct msm_gpu *gpu,
 340                 struct msm_gem_submit *submit, char *comm, char *cmd)
 341 {
 342         struct msm_gpu_state *state;
 343
 344         /* Check if the target supports capturing crash state */
 345         if (!gpu->funcs->gpu_state_get)
 346                 return;
 347
 348         /* Only save one crash state at a time */
 349         if (gpu->crashstate)
 350                 return;
 351
 352         state = gpu->funcs->gpu_state_get(gpu);
 353         if (IS_ERR_OR_NULL(state))
 354                 return;
 355
 356         /* Fill in the additional crash state information */
 357         state->comm = kstrdup(comm, GFP_KERNEL);
 358         state->cmd = kstrdup(cmd, GFP_KERNEL);
 359
 360         if (submit) {
 361                 int i, nr = 0;
 362
 363                 /* count # of buffers to dump: */
 364                 for (i = 0; i < submit->nr_bos; i++)
 365                         if (should_dump(submit, i))
 366                                 nr++;
 367                 /* always dump cmd bo's, but don't double count them: */
 368                 for (i = 0; i < submit->nr_cmds; i++)
 369                         if (!should_dump(submit, submit->cmd[i].idx))
 370                                 nr++;
 371
 372                 state->bos = kcalloc(nr,
 373                         sizeof(struct msm_gpu_state_bo), GFP_KERNEL);
 374
 375                 for (i = 0; i < submit->nr_bos; i++) {
 376                         if (should_dump(submit, i)) {
 377                                 msm_gpu_crashstate_get_bo(state, submit->bos[i].obj,
 378                                         submit->bos[i].iova, submit->bos[i].flags);
 379                         }
 380                 }
 381
 382                 for (i = 0; state->bos && i < submit->nr_cmds; i++) {
 383                         int idx = submit->cmd[i].idx;
 384
 385                         if (!should_dump(submit, submit->cmd[i].idx)) {
 386                                 msm_gpu_crashstate_get_bo(state, submit->bos[idx].obj,
 387                                         submit->bos[idx].iova, submit->bos[idx].flags);
 388                         }
 389                 }
 390         }
 391
 392         /* Set the active crash state to be dumped on failure */
 393         gpu->crashstate = state;
 394
 395         /* FIXME: Release the crashstate if this errors out? */
 396         dev_coredumpm(gpu->dev->dev, THIS_MODULE, gpu, 0, GFP_KERNEL,
 397                 msm_gpu_devcoredump_read, msm_gpu_devcoredump_free);
 398 }
 399 #else
 400 static void msm_gpu_crashstate_capture(struct msm_gpu *gpu,
 401                 struct msm_gem_submit *submit, char *comm, char *cmd)
 402 {
 403 }
 404 #endif
 405
 406 /*
 407  * Hangcheck detection for locked gpu:
 408  */
 409
 410 static void update_fences(struct msm_gpu *gpu, struct msm_ringbuffer *ring,
 411                 uint32_t fence)
 412 {
 413         struct msm_gem_submit *submit;
 414
 415         list_for_each_entry(submit, &ring->submits, node) {
 416                 if (submit->seqno > fence)
 417                         break;
 418
 419                 msm_update_fence(submit->ring->fctx,
 420                         submit->fence->seqno);
 421         }
 422 }
 423
 424 static struct msm_gem_submit *
 425 find_submit(struct msm_ringbuffer *ring, uint32_t fence)
 426 {
 427         struct msm_gem_submit *submit;
 428
 429         WARN_ON(!mutex_is_locked(&ring->gpu->dev->struct_mutex));
 430
 431         list_for_each_entry(submit, &ring->submits, node)
 432                 if (submit->seqno == fence)
 433                         return submit;
 434
 435         return NULL;
 436 }
 437
 438 static void retire_submits(struct msm_gpu *gpu);
 439
 440 static void recover_worker(struct work_struct *work)
 441 {
 442         struct msm_gpu *gpu = container_of(work, struct msm_gpu, recover_work);
 443         struct drm_device *dev = gpu->dev;
 444         struct msm_drm_private *priv = dev->dev_private;
 445         struct msm_gem_submit *submit;
 446         struct msm_ringbuffer *cur_ring = gpu->funcs->active_ring(gpu);
 447         char *comm = NULL, *cmd = NULL;
 448         int i;
 449
 450         mutex_lock(&dev->struct_mutex);
 451
 452         DRM_DEV_ERROR(dev->dev, "%s: hangcheck recover!\n", gpu->name);
 453
 454         submit = find_submit(cur_ring, cur_ring->memptrs->fence + 1);
 455         if (submit) {
 456                 struct task_struct *task;
 457
 458                 /* Increment the fault counts */
 459                 gpu->global_faults++;
 460                 submit->queue->faults++;
 461
 462                 task = get_pid_task(submit->pid, PIDTYPE_PID);
 463                 if (task) {
 464                         comm = kstrdup(task->comm, GFP_KERNEL);
 465                         cmd = kstrdup_quotable_cmdline(task, GFP_KERNEL);
 466                         put_task_struct(task);
 467                 }
 468
 469                 if (comm && cmd) {
 470                         DRM_DEV_ERROR(dev->dev, "%s: offending task: %s (%s)\n",
 471                                 gpu->name, comm, cmd);
 472
 473                         msm_rd_dump_submit(priv->hangrd, submit,
 474                                 "offending task: %s (%s)", comm, cmd);
 475                 } else
 476                         msm_rd_dump_submit(priv->hangrd, submit, NULL);
 477         }
 478
 479         /* Record the crash state */
 480         pm_runtime_get_sync(&gpu->pdev->dev);
 481         msm_gpu_crashstate_capture(gpu, submit, comm, cmd);
 482         pm_runtime_put_sync(&gpu->pdev->dev);
 483
 484         kfree(cmd);
 485         kfree(comm);
 486
 487         /*
 488          * Update all the rings with the latest and greatest fence.. this
 489          * needs to happen after msm_rd_dump_submit() to ensure that the
 490          * bo's referenced by the offending submit are still around.
 491          */
 492         for (i = 0; i < gpu->nr_rings; i++) {
 493                 struct msm_ringbuffer *ring = gpu->rb[i];
 494
 495                 uint32_t fence = ring->memptrs->fence;
 496
 497                 /*
 498                  * For the current (faulting?) ring/submit advance the fence by
 499                  * one more to clear the faulting submit
 500                  */
 501                 if (ring == cur_ring)
 502                         fence++;
 503
 504                 update_fences(gpu, ring, fence);
 505         }
 506
 507         if (msm_gpu_active(gpu)) {
 508                 /* retire completed submits, plus the one that hung: */
 509                 retire_submits(gpu);
 510
 511                 pm_runtime_get_sync(&gpu->pdev->dev);
 512                 gpu->funcs->recover(gpu);
 513                 pm_runtime_put_sync(&gpu->pdev->dev);
 514
 515                 /*
 516                  * Replay all remaining submits starting with highest priority
 517                  * ring
 518                  */
 519                 for (i = 0; i < gpu->nr_rings; i++) {
 520                         struct msm_ringbuffer *ring = gpu->rb[i];
 521
 522                         list_for_each_entry(submit, &ring->submits, node)
 523                                 gpu->funcs->submit(gpu, submit, NULL);
 524                 }
 525         }
 526
 527         mutex_unlock(&dev->struct_mutex);
 528
 529         msm_gpu_retire(gpu);
 530 }
 531
 532 static void hangcheck_timer_reset(struct msm_gpu *gpu)
 533 {
 534         DBG("%s", gpu->name);
 535         mod_timer(&gpu->hangcheck_timer,
 536                         round_jiffies_up(jiffies + DRM_MSM_HANGCHECK_JIFFIES));
 537 }
 538
 539 static void hangcheck_handler(struct timer_list *t)
 540 {
 541         struct msm_gpu *gpu = from_timer(gpu, t, hangcheck_timer);
 542         struct drm_device *dev = gpu->dev;
 543         struct msm_drm_private *priv = dev->dev_private;
 544         struct msm_ringbuffer *ring = gpu->funcs->active_ring(gpu);
 545         uint32_t fence = ring->memptrs->fence;
 546
 547         if (fence != ring->hangcheck_fence) {
 548                 /* some progress has been made.. ya! */
 549                 ring->hangcheck_fence = fence;
 550         } else if (fence < ring->seqno) {
 551                 /* no progress and not done.. hung! */
 552                 ring->hangcheck_fence = fence;
 553                 DRM_DEV_ERROR(dev->dev, "%s: hangcheck detected gpu lockup rb %d!\n",
 554                                 gpu->name, ring->id);
 555                 DRM_DEV_ERROR(dev->dev, "%s:     completed fence: %u\n",
 556                                 gpu->name, fence);
 557                 DRM_DEV_ERROR(dev->dev, "%s:     submitted fence: %u\n",
 558                                 gpu->name, ring->seqno);
 559
 560                 queue_work(priv->wq, &gpu->recover_work);
 561         }
 562
 563         /* if still more pending work, reset the hangcheck timer: */
 564         if (ring->seqno > ring->hangcheck_fence)
 565                 hangcheck_timer_reset(gpu);
 566
 567         /* workaround for missing irq: */
 568         queue_work(priv->wq, &gpu->retire_work);
 569 }
 570
 571 /*
 572  * Performance Counters:
 573  */
 574
 575 /* called under perf_lock */
 576 static int update_hw_cntrs(struct msm_gpu *gpu, uint32_t ncntrs, uint32_t *cntrs)
 577 {
 578         uint32_t current_cntrs[ARRAY_SIZE(gpu->last_cntrs)];
 579         int i, n = min(ncntrs, gpu->num_perfcntrs);
 580
 581         /* read current values: */
 582         for (i = 0; i < gpu->num_perfcntrs; i++)
 583                 current_cntrs[i] = gpu_read(gpu, gpu->perfcntrs[i].sample_reg);
 584
 585         /* update cntrs: */
 586         for (i = 0; i < n; i++)
 587                 cntrs[i] = current_cntrs[i] - gpu->last_cntrs[i];
 588
 589         /* save current values: */
 590         for (i = 0; i < gpu->num_perfcntrs; i++)
 591                 gpu->last_cntrs[i] = current_cntrs[i];
 592
 593         return n;
 594 }
 595
 596 static void update_sw_cntrs(struct msm_gpu *gpu)
 597 {
 598         ktime_t time;
 599         uint32_t elapsed;
 600         unsigned long flags;
 601
 602         spin_lock_irqsave(&gpu->perf_lock, flags);
 603         if (!gpu->perfcntr_active)
 604                 goto out;
 605
 606         time = ktime_get();
 607         elapsed = ktime_to_us(ktime_sub(time, gpu->last_sample.time));
 608
 609         gpu->totaltime += elapsed;
 610         if (gpu->last_sample.active)
 611                 gpu->activetime += elapsed;
 612
 613         gpu->last_sample.active = msm_gpu_active(gpu);
 614         gpu->last_sample.time = time;
 615
 616 out:
 617         spin_unlock_irqrestore(&gpu->perf_lock, flags);
 618 }
 619
 620 void msm_gpu_perfcntr_start(struct msm_gpu *gpu)
 621 {
 622         unsigned long flags;
 623
 624         pm_runtime_get_sync(&gpu->pdev->dev);
 625
 626         spin_lock_irqsave(&gpu->perf_lock, flags);
 627         /* we could dynamically enable/disable perfcntr registers too.. */
 628         gpu->last_sample.active = msm_gpu_active(gpu);
 629         gpu->last_sample.time = ktime_get();
 630         gpu->activetime = gpu->totaltime = 0;
 631         gpu->perfcntr_active = true;
 632         update_hw_cntrs(gpu, 0, NULL);
 633         spin_unlock_irqrestore(&gpu->perf_lock, flags);
 634 }
 635
 636 void msm_gpu_perfcntr_stop(struct msm_gpu *gpu)
 637 {
 638         gpu->perfcntr_active = false;
 639         pm_runtime_put_sync(&gpu->pdev->dev);
 640 }
 641
 642 /* returns -errno or # of cntrs sampled */
 643 int msm_gpu_perfcntr_sample(struct msm_gpu *gpu, uint32_t *activetime,
 644                 uint32_t *totaltime, uint32_t ncntrs, uint32_t *cntrs)
 645 {
 646         unsigned long flags;
 647         int ret;
 648
 649         spin_lock_irqsave(&gpu->perf_lock, flags);
 650
 651         if (!gpu->perfcntr_active) {
 652                 ret = -EINVAL;
 653                 goto out;
 654         }
 655
 656         *activetime = gpu->activetime;
 657         *totaltime = gpu->totaltime;
 658
 659         gpu->activetime = gpu->totaltime = 0;
 660
 661         ret = update_hw_cntrs(gpu, ncntrs, cntrs);
 662
 663 out:
 664         spin_unlock_irqrestore(&gpu->perf_lock, flags);
 665
 666         return ret;
 667 }
 668
 669 /*
 670  * Cmdstream submission/retirement:
 671  */
 672
 673 static void retire_submit(struct msm_gpu *gpu, struct msm_ringbuffer *ring,
 674                 struct msm_gem_submit *submit)
 675 {
 676         int index = submit->seqno % MSM_GPU_SUBMIT_STATS_COUNT;
 677         volatile struct msm_gpu_submit_stats *stats;
 678         u64 elapsed, clock = 0;
 679         int i;
 680
 681         stats = &ring->memptrs->stats[index];
 682         /* Convert 19.2Mhz alwayson ticks to nanoseconds for elapsed time */
 683         elapsed = (stats->alwayson_end - stats->alwayson_start) * 10000;
 684         do_div(elapsed, 192);
 685
 686         /* Calculate the clock frequency from the number of CP cycles */
 687         if (elapsed) {
 688                 clock = (stats->cpcycles_end - stats->cpcycles_start) * 1000;
 689                 do_div(clock, elapsed);
 690         }
 691
 692         trace_msm_gpu_submit_retired(submit, elapsed, clock,
 693                 stats->alwayson_start, stats->alwayson_end);
 694
 695         for (i = 0; i < submit->nr_bos; i++) {
 696                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 697                 /* move to inactive: */
 698                 msm_gem_move_to_inactive(&msm_obj->base);
 699                 msm_gem_unpin_iova(&msm_obj->base, submit->aspace);
 700                 drm_gem_object_put_locked(&msm_obj->base);
 701         }
 702
 703         pm_runtime_mark_last_busy(&gpu->pdev->dev);
 704         pm_runtime_put_autosuspend(&gpu->pdev->dev);
 705         msm_gem_submit_free(submit);
 706 }
 707
 708 static void retire_submits(struct msm_gpu *gpu)
 709 {
 710         struct drm_device *dev = gpu->dev;
 711         struct msm_gem_submit *submit, *tmp;
 712         int i;
 713
 714         WARN_ON(!mutex_is_locked(&dev->struct_mutex));
 715
 716         /* Retire the commits starting with highest priority */
 717         for (i = 0; i < gpu->nr_rings; i++) {
 718                 struct msm_ringbuffer *ring = gpu->rb[i];
 719
 720                 list_for_each_entry_safe(submit, tmp, &ring->submits, node) {
 721                         if (dma_fence_is_signaled(submit->fence))
 722                                 retire_submit(gpu, ring, submit);
 723                 }
 724         }
 725 }
 726
 727 static void retire_worker(struct work_struct *work)
 728 {
 729         struct msm_gpu *gpu = container_of(work, struct msm_gpu, retire_work);
 730         struct drm_device *dev = gpu->dev;
 731         int i;
 732
 733         for (i = 0; i < gpu->nr_rings; i++)
 734                 update_fences(gpu, gpu->rb[i], gpu->rb[i]->memptrs->fence);
 735
 736         mutex_lock(&dev->struct_mutex);
 737         retire_submits(gpu);
 738         mutex_unlock(&dev->struct_mutex);
 739 }
 740
 741 /* call from irq handler to schedule work to retire bo's */
 742 void msm_gpu_retire(struct msm_gpu *gpu)
 743 {
 744         struct msm_drm_private *priv = gpu->dev->dev_private;
 745         queue_work(priv->wq, &gpu->retire_work);
 746         update_sw_cntrs(gpu);
 747 }
 748
 749 /* add bo's to gpu's ring, and kick gpu: */
 750 void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
 751                 struct msm_file_private *ctx)
 752 {
 753         struct drm_device *dev = gpu->dev;
 754         struct msm_drm_private *priv = dev->dev_private;
 755         struct msm_ringbuffer *ring = submit->ring;
 756         int i;
 757
 758         WARN_ON(!mutex_is_locked(&dev->struct_mutex));
 759
 760         pm_runtime_get_sync(&gpu->pdev->dev);
 761
 762         msm_gpu_hw_init(gpu);
 763
 764         submit->seqno = ++ring->seqno;
 765
 766         list_add_tail(&submit->node, &ring->submits);
 767
 768         msm_rd_dump_submit(priv->rd, submit, NULL);
 769
 770         update_sw_cntrs(gpu);
 771
 772         for (i = 0; i < submit->nr_bos; i++) {
 773                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 774                 uint64_t iova;
 775
 776                 /* can't happen yet.. but when we add 2d support we'll have
 777                  * to deal w/ cross-ring synchronization:
 778                  */
 779                 WARN_ON(is_active(msm_obj) && (msm_obj->gpu != gpu));
 780
 781                 /* submit takes a reference to the bo and iova until retired: */
 782                 drm_gem_object_get(&msm_obj->base);
 783                 msm_gem_get_and_pin_iova(&msm_obj->base, submit->aspace, &iova);
 784
 785                 if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE)
 786                         msm_gem_move_to_active(&msm_obj->base, gpu, true, submit->fence);
 787                 else if (submit->bos[i].flags & MSM_SUBMIT_BO_READ)
 788                         msm_gem_move_to_active(&msm_obj->base, gpu, false, submit->fence);
 789         }
 790
 791         gpu->funcs->submit(gpu, submit, ctx);
 792         priv->lastctx = ctx;
 793
 794         hangcheck_timer_reset(gpu);
 795 }
 796
 797 /*
 798  * Init/Cleanup:
 799  */
 800
 801 static irqreturn_t irq_handler(int irq, void *data)
 802 {
 803         struct msm_gpu *gpu = data;
 804         return gpu->funcs->irq(gpu);
 805 }
 806
 807 static int get_clocks(struct platform_device *pdev, struct msm_gpu *gpu)
 808 {
 809         int ret = devm_clk_bulk_get_all(&pdev->dev, &gpu->grp_clks);
 810
 811         if (ret < 1) {
 812                 gpu->nr_clocks = 0;
 813                 return ret;
 814         }
 815
 816         gpu->nr_clocks = ret;
 817
 818         gpu->core_clk = msm_clk_bulk_get_clock(gpu->grp_clks,
 819                 gpu->nr_clocks, "core");
 820
 821         gpu->rbbmtimer_clk = msm_clk_bulk_get_clock(gpu->grp_clks,
 822                 gpu->nr_clocks, "rbbmtimer");
 823
 824         return 0;
 825 }
 826
 827 int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 828                 struct msm_gpu *gpu, const struct msm_gpu_funcs *funcs,
 829                 const char *name, struct msm_gpu_config *config)
 830 {
 831         int i, ret, nr_rings = config->nr_rings;
 832         void *memptrs;
 833         uint64_t memptrs_iova;
 834
 835         if (WARN_ON(gpu->num_perfcntrs > ARRAY_SIZE(gpu->last_cntrs)))
 836                 gpu->num_perfcntrs = ARRAY_SIZE(gpu->last_cntrs);
 837
 838         gpu->dev = drm;
 839         gpu->funcs = funcs;
 840         gpu->name = name;
 841
 842         INIT_LIST_HEAD(&gpu->active_list);
 843         INIT_WORK(&gpu->retire_work, retire_worker);
 844         INIT_WORK(&gpu->recover_work, recover_worker);
 845
 846
 847         timer_setup(&gpu->hangcheck_timer, hangcheck_handler, 0);
 848
 849         spin_lock_init(&gpu->perf_lock);
 850
 851
 852         /* Map registers: */
 853         gpu->mmio = msm_ioremap(pdev, config->ioname, name);
 854         if (IS_ERR(gpu->mmio)) {
 855                 ret = PTR_ERR(gpu->mmio);
 856                 goto fail;
 857         }
 858
 859         /* Get Interrupt: */
 860         gpu->irq = platform_get_irq(pdev, 0);
 861         if (gpu->irq < 0) {
 862                 ret = gpu->irq;
 863                 DRM_DEV_ERROR(drm->dev, "failed to get irq: %d\n", ret);
 864                 goto fail;
 865         }
 866
 867         ret = devm_request_irq(&pdev->dev, gpu->irq, irq_handler,
 868                         IRQF_TRIGGER_HIGH, gpu->name, gpu);
 869         if (ret) {
 870                 DRM_DEV_ERROR(drm->dev, "failed to request IRQ%u: %d\n", gpu->irq, ret);
 871                 goto fail;
 872         }
 873
 874         ret = get_clocks(pdev, gpu);
 875         if (ret)
 876                 goto fail;
 877
 878         gpu->ebi1_clk = msm_clk_get(pdev, "bus");
 879         DBG("ebi1_clk: %p", gpu->ebi1_clk);
 880         if (IS_ERR(gpu->ebi1_clk))
 881                 gpu->ebi1_clk = NULL;
 882
 883         /* Acquire regulators: */
 884         gpu->gpu_reg = devm_regulator_get(&pdev->dev, "vdd");
 885         DBG("gpu_reg: %p", gpu->gpu_reg);
 886         if (IS_ERR(gpu->gpu_reg))
 887                 gpu->gpu_reg = NULL;
 888
 889         gpu->gpu_cx = devm_regulator_get(&pdev->dev, "vddcx");
 890         DBG("gpu_cx: %p", gpu->gpu_cx);
 891         if (IS_ERR(gpu->gpu_cx))
 892                 gpu->gpu_cx = NULL;
 893
 894         gpu->pdev = pdev;
 895         platform_set_drvdata(pdev, gpu);
 896
 897         msm_devfreq_init(gpu);
 898
 899
 900         gpu->aspace = gpu->funcs->create_address_space(gpu, pdev);
 901
 902         if (gpu->aspace == NULL)
 903                 DRM_DEV_INFO(drm->dev, "%s: no IOMMU, fallback to VRAM carveout!\n", name);
 904         else if (IS_ERR(gpu->aspace)) {
 905                 ret = PTR_ERR(gpu->aspace);
 906                 goto fail;
 907         }
 908
 909         memptrs = msm_gem_kernel_new(drm,
 910                 sizeof(struct msm_rbmemptrs) * nr_rings,
 911                 check_apriv(gpu, MSM_BO_UNCACHED), gpu->aspace, &gpu->memptrs_bo,
 912                 &memptrs_iova);
 913
 914         if (IS_ERR(memptrs)) {
 915                 ret = PTR_ERR(memptrs);
 916                 DRM_DEV_ERROR(drm->dev, "could not allocate memptrs: %d\n", ret);
 917                 goto fail;
 918         }
 919
 920         msm_gem_object_set_name(gpu->memptrs_bo, "memptrs");
 921
 922         if (nr_rings > ARRAY_SIZE(gpu->rb)) {
 923                 DRM_DEV_INFO_ONCE(drm->dev, "Only creating %zu ringbuffers\n",
 924                         ARRAY_SIZE(gpu->rb));
 925                 nr_rings = ARRAY_SIZE(gpu->rb);
 926         }
 927
 928         /* Create ringbuffer(s): */
 929         for (i = 0; i < nr_rings; i++) {
 930                 gpu->rb[i] = msm_ringbuffer_new(gpu, i, memptrs, memptrs_iova);
 931
 932                 if (IS_ERR(gpu->rb[i])) {
 933                         ret = PTR_ERR(gpu->rb[i]);
 934                         DRM_DEV_ERROR(drm->dev,
 935                                 "could not create ringbuffer %d: %d\n", i, ret);
 936                         goto fail;
 937                 }
 938
 939                 memptrs += sizeof(struct msm_rbmemptrs);
 940                 memptrs_iova += sizeof(struct msm_rbmemptrs);
 941         }
 942
 943         gpu->nr_rings = nr_rings;
 944
 945         return 0;
 946
 947 fail:
 948         for (i = 0; i < ARRAY_SIZE(gpu->rb); i++)  {
 949                 msm_ringbuffer_destroy(gpu->rb[i]);
 950                 gpu->rb[i] = NULL;
 951         }
 952
 953         msm_gem_kernel_put(gpu->memptrs_bo, gpu->aspace, false);
 954
 955         platform_set_drvdata(pdev, NULL);
 956         return ret;
 957 }
 958
 959 void msm_gpu_cleanup(struct msm_gpu *gpu)
 960 {
 961         int i;
 962
 963         DBG("%s", gpu->name);
 964
 965         WARN_ON(!list_empty(&gpu->active_list));
 966
 967         for (i = 0; i < ARRAY_SIZE(gpu->rb); i++) {
 968                 msm_ringbuffer_destroy(gpu->rb[i]);
 969                 gpu->rb[i] = NULL;
 970         }
 971
 972         msm_gem_kernel_put(gpu->memptrs_bo, gpu->aspace, false);
 973
 974         if (!IS_ERR_OR_NULL(gpu->aspace)) {
 975                 gpu->aspace->mmu->funcs->detach(gpu->aspace->mmu);
 976                 msm_gem_address_space_put(gpu->aspace);
 977         }
 978 }