drivers/gpu/drm/msm/msm

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
msm_devfreq_target
msm_devfreq_get_dev_status
msm_devfreq_get_cur_freq
msm_devfreq_init
enable_pwrrail
disable_pwrrail
enable_clk
disable_clk
enable_axi
disable_axi
msm_gpu_resume_devfreq
msm_gpu_pm_resume
msm_gpu_pm_suspend
msm_gpu_hw_init
msm_gpu_devcoredump_read
msm_gpu_devcoredump_free
msm_gpu_crashstate_get_bo
msm_gpu_crashstate_capture
msm_gpu_crashstate_capture
update_fences
find_submit
recover_worker
hangcheck_timer_reset
hangcheck_handler
update_hw_cntrs
update_sw_cntrs
msm_gpu_perfcntr_start
msm_gpu_perfcntr_stop
msm_gpu_perfcntr_sample
retire_submit
retire_submits
retire_worker
msm_gpu_retire
msm_gpu_submit
irq_handler
get_clocks
msm_gpu_create_address_space
msm_gpu_init
msm_gpu_cleanup
   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/pm_opp.h>
  17 #include <linux/devfreq.h>
  18 #include <linux/devcoredump.h>
  19 #include <linux/sched/task.h>
  20 
  21 /*
  22  * Power Management:
  23  */
  24 
  25 static int msm_devfreq_target(struct device *dev, unsigned long *freq,
  26                 u32 flags)
  27 {
  28         struct msm_gpu *gpu = platform_get_drvdata(to_platform_device(dev));
  29         struct dev_pm_opp *opp;
  30 
  31         opp = devfreq_recommended_opp(dev, freq, flags);
  32 
  33         if (IS_ERR(opp))
  34                 return PTR_ERR(opp);
  35 
  36         if (gpu->funcs->gpu_set_freq)
  37                 gpu->funcs->gpu_set_freq(gpu, (u64)*freq);
  38         else
  39                 clk_set_rate(gpu->core_clk, *freq);
  40 
  41         dev_pm_opp_put(opp);
  42 
  43         return 0;
  44 }
  45 
  46 static int msm_devfreq_get_dev_status(struct device *dev,
  47                 struct devfreq_dev_status *status)
  48 {
  49         struct msm_gpu *gpu = platform_get_drvdata(to_platform_device(dev));
  50         ktime_t time;
  51 
  52         if (gpu->funcs->gpu_get_freq)
  53                 status->current_frequency = gpu->funcs->gpu_get_freq(gpu);
  54         else
  55                 status->current_frequency = clk_get_rate(gpu->core_clk);
  56 
  57         status->busy_time = gpu->funcs->gpu_busy(gpu);
  58 
  59         time = ktime_get();
  60         status->total_time = ktime_us_delta(time, gpu->devfreq.time);
  61         gpu->devfreq.time = time;
  62 
  63         return 0;
  64 }
  65 
  66 static int msm_devfreq_get_cur_freq(struct device *dev, unsigned long *freq)
  67 {
  68         struct msm_gpu *gpu = platform_get_drvdata(to_platform_device(dev));
  69 
  70         if (gpu->funcs->gpu_get_freq)
  71                 *freq = gpu->funcs->gpu_get_freq(gpu);
  72         else
  73                 *freq = clk_get_rate(gpu->core_clk);
  74 
  75         return 0;
  76 }
  77 
  78 static struct devfreq_dev_profile msm_devfreq_profile = {
  79         .polling_ms = 10,
  80         .target = msm_devfreq_target,
  81         .get_dev_status = msm_devfreq_get_dev_status,
  82         .get_cur_freq = msm_devfreq_get_cur_freq,
  83 };
  84 
  85 static void msm_devfreq_init(struct msm_gpu *gpu)
  86 {
  87         /* We need target support to do devfreq */
  88         if (!gpu->funcs->gpu_busy)
  89                 return;
  90 
  91         msm_devfreq_profile.initial_freq = gpu->fast_rate;
  92 
  93         /*
  94          * Don't set the freq_table or max_state and let devfreq build the table
  95          * from OPP
  96          */
  97 
  98         gpu->devfreq.devfreq = devm_devfreq_add_device(&gpu->pdev->dev,
  99                         &msm_devfreq_profile, DEVFREQ_GOV_SIMPLE_ONDEMAND,
 100                         NULL);
 101 
 102         if (IS_ERR(gpu->devfreq.devfreq)) {
 103                 DRM_DEV_ERROR(&gpu->pdev->dev, "Couldn't initialize GPU devfreq\n");
 104                 gpu->devfreq.devfreq = NULL;
 105         }
 106 
 107         devfreq_suspend_device(gpu->devfreq.devfreq);
 108 }
 109 
 110 static int enable_pwrrail(struct msm_gpu *gpu)
 111 {
 112         struct drm_device *dev = gpu->dev;
 113         int ret = 0;
 114 
 115         if (gpu->gpu_reg) {
 116                 ret = regulator_enable(gpu->gpu_reg);
 117                 if (ret) {
 118                         DRM_DEV_ERROR(dev->dev, "failed to enable 'gpu_reg': %d\n", ret);
 119                         return ret;
 120                 }
 121         }
 122 
 123         if (gpu->gpu_cx) {
 124                 ret = regulator_enable(gpu->gpu_cx);
 125                 if (ret) {
 126                         DRM_DEV_ERROR(dev->dev, "failed to enable 'gpu_cx': %d\n", ret);
 127                         return ret;
 128                 }
 129         }
 130 
 131         return 0;
 132 }
 133 
 134 static int disable_pwrrail(struct msm_gpu *gpu)
 135 {
 136         if (gpu->gpu_cx)
 137                 regulator_disable(gpu->gpu_cx);
 138         if (gpu->gpu_reg)
 139                 regulator_disable(gpu->gpu_reg);
 140         return 0;
 141 }
 142 
 143 static int enable_clk(struct msm_gpu *gpu)
 144 {
 145         if (gpu->core_clk && gpu->fast_rate)
 146                 clk_set_rate(gpu->core_clk, gpu->fast_rate);
 147 
 148         /* Set the RBBM timer rate to 19.2Mhz */
 149         if (gpu->rbbmtimer_clk)
 150                 clk_set_rate(gpu->rbbmtimer_clk, 19200000);
 151 
 152         return clk_bulk_prepare_enable(gpu->nr_clocks, gpu->grp_clks);
 153 }
 154 
 155 static int disable_clk(struct msm_gpu *gpu)
 156 {
 157         clk_bulk_disable_unprepare(gpu->nr_clocks, gpu->grp_clks);
 158 
 159         /*
 160          * Set the clock to a deliberately low rate. On older targets the clock
 161          * speed had to be non zero to avoid problems. On newer targets this
 162          * will be rounded down to zero anyway so it all works out.
 163          */
 164         if (gpu->core_clk)
 165                 clk_set_rate(gpu->core_clk, 27000000);
 166 
 167         if (gpu->rbbmtimer_clk)
 168                 clk_set_rate(gpu->rbbmtimer_clk, 0);
 169 
 170         return 0;
 171 }
 172 
 173 static int enable_axi(struct msm_gpu *gpu)
 174 {
 175         if (gpu->ebi1_clk)
 176                 clk_prepare_enable(gpu->ebi1_clk);
 177         return 0;
 178 }
 179 
 180 static int disable_axi(struct msm_gpu *gpu)
 181 {
 182         if (gpu->ebi1_clk)
 183                 clk_disable_unprepare(gpu->ebi1_clk);
 184         return 0;
 185 }
 186 
 187 void msm_gpu_resume_devfreq(struct msm_gpu *gpu)
 188 {
 189         gpu->devfreq.busy_cycles = 0;
 190         gpu->devfreq.time = ktime_get();
 191 
 192         devfreq_resume_device(gpu->devfreq.devfreq);
 193 }
 194 
 195 int msm_gpu_pm_resume(struct msm_gpu *gpu)
 196 {
 197         int ret;
 198 
 199         DBG("%s", gpu->name);
 200 
 201         ret = enable_pwrrail(gpu);
 202         if (ret)
 203                 return ret;
 204 
 205         ret = enable_clk(gpu);
 206         if (ret)
 207                 return ret;
 208 
 209         ret = enable_axi(gpu);
 210         if (ret)
 211                 return ret;
 212 
 213         msm_gpu_resume_devfreq(gpu);
 214 
 215         gpu->needs_hw_init = true;
 216 
 217         return 0;
 218 }
 219 
 220 int msm_gpu_pm_suspend(struct msm_gpu *gpu)
 221 {
 222         int ret;
 223 
 224         DBG("%s", gpu->name);
 225 
 226         devfreq_suspend_device(gpu->devfreq.devfreq);
 227 
 228         ret = disable_axi(gpu);
 229         if (ret)
 230                 return ret;
 231 
 232         ret = disable_clk(gpu);
 233         if (ret)
 234                 return ret;
 235 
 236         ret = disable_pwrrail(gpu);
 237         if (ret)
 238                 return ret;
 239 
 240         return 0;
 241 }
 242 
 243 int msm_gpu_hw_init(struct msm_gpu *gpu)
 244 {
 245         int ret;
 246 
 247         WARN_ON(!mutex_is_locked(&gpu->dev->struct_mutex));
 248 
 249         if (!gpu->needs_hw_init)
 250                 return 0;
 251 
 252         disable_irq(gpu->irq);
 253         ret = gpu->funcs->hw_init(gpu);
 254         if (!ret)
 255                 gpu->needs_hw_init = false;
 256         enable_irq(gpu->irq);
 257 
 258         return ret;
 259 }
 260 
 261 #ifdef CONFIG_DEV_COREDUMP
 262 static ssize_t msm_gpu_devcoredump_read(char *buffer, loff_t offset,
 263                 size_t count, void *data, size_t datalen)
 264 {
 265         struct msm_gpu *gpu = data;
 266         struct drm_print_iterator iter;
 267         struct drm_printer p;
 268         struct msm_gpu_state *state;
 269 
 270         state = msm_gpu_crashstate_get(gpu);
 271         if (!state)
 272                 return 0;
 273 
 274         iter.data = buffer;
 275         iter.offset = 0;
 276         iter.start = offset;
 277         iter.remain = count;
 278 
 279         p = drm_coredump_printer(&iter);
 280 
 281         drm_printf(&p, "---\n");
 282         drm_printf(&p, "kernel: " UTS_RELEASE "\n");
 283         drm_printf(&p, "module: " KBUILD_MODNAME "\n");
 284         drm_printf(&p, "time: %lld.%09ld\n",
 285                 state->time.tv_sec, state->time.tv_nsec);
 286         if (state->comm)
 287                 drm_printf(&p, "comm: %s\n", state->comm);
 288         if (state->cmd)
 289                 drm_printf(&p, "cmdline: %s\n", state->cmd);
 290 
 291         gpu->funcs->show(gpu, state, &p);
 292 
 293         msm_gpu_crashstate_put(gpu);
 294 
 295         return count - iter.remain;
 296 }
 297 
 298 static void msm_gpu_devcoredump_free(void *data)
 299 {
 300         struct msm_gpu *gpu = data;
 301 
 302         msm_gpu_crashstate_put(gpu);
 303 }
 304 
 305 static void msm_gpu_crashstate_get_bo(struct msm_gpu_state *state,
 306                 struct msm_gem_object *obj, u64 iova, u32 flags)
 307 {
 308         struct msm_gpu_state_bo *state_bo = &state->bos[state->nr_bos];
 309 
 310         /* Don't record write only objects */
 311         state_bo->size = obj->base.size;
 312         state_bo->iova = iova;
 313 
 314         /* Only store data for non imported buffer objects marked for read */
 315         if ((flags & MSM_SUBMIT_BO_READ) && !obj->base.import_attach) {
 316                 void *ptr;
 317 
 318                 state_bo->data = kvmalloc(obj->base.size, GFP_KERNEL);
 319                 if (!state_bo->data)
 320                         goto out;
 321 
 322                 ptr = msm_gem_get_vaddr_active(&obj->base);
 323                 if (IS_ERR(ptr)) {
 324                         kvfree(state_bo->data);
 325                         state_bo->data = NULL;
 326                         goto out;
 327                 }
 328 
 329                 memcpy(state_bo->data, ptr, obj->base.size);
 330                 msm_gem_put_vaddr(&obj->base);
 331         }
 332 out:
 333         state->nr_bos++;
 334 }
 335 
 336 static void msm_gpu_crashstate_capture(struct msm_gpu *gpu,
 337                 struct msm_gem_submit *submit, char *comm, char *cmd)
 338 {
 339         struct msm_gpu_state *state;
 340 
 341         /* Check if the target supports capturing crash state */
 342         if (!gpu->funcs->gpu_state_get)
 343                 return;
 344 
 345         /* Only save one crash state at a time */
 346         if (gpu->crashstate)
 347                 return;
 348 
 349         state = gpu->funcs->gpu_state_get(gpu);
 350         if (IS_ERR_OR_NULL(state))
 351                 return;
 352 
 353         /* Fill in the additional crash state information */
 354         state->comm = kstrdup(comm, GFP_KERNEL);
 355         state->cmd = kstrdup(cmd, GFP_KERNEL);
 356 
 357         if (submit) {
 358                 int i;
 359 
 360                 state->bos = kcalloc(submit->nr_cmds,
 361                         sizeof(struct msm_gpu_state_bo), GFP_KERNEL);
 362 
 363                 for (i = 0; state->bos && i < submit->nr_cmds; i++) {
 364                         int idx = submit->cmd[i].idx;
 365 
 366                         msm_gpu_crashstate_get_bo(state, submit->bos[idx].obj,
 367                                 submit->bos[idx].iova, submit->bos[idx].flags);
 368                 }
 369         }
 370 
 371         /* Set the active crash state to be dumped on failure */
 372         gpu->crashstate = state;
 373 
 374         /* FIXME: Release the crashstate if this errors out? */
 375         dev_coredumpm(gpu->dev->dev, THIS_MODULE, gpu, 0, GFP_KERNEL,
 376                 msm_gpu_devcoredump_read, msm_gpu_devcoredump_free);
 377 }
 378 #else
 379 static void msm_gpu_crashstate_capture(struct msm_gpu *gpu,
 380                 struct msm_gem_submit *submit, char *comm, char *cmd)
 381 {
 382 }
 383 #endif
 384 
 385 /*
 386  * Hangcheck detection for locked gpu:
 387  */
 388 
 389 static void update_fences(struct msm_gpu *gpu, struct msm_ringbuffer *ring,
 390                 uint32_t fence)
 391 {
 392         struct msm_gem_submit *submit;
 393 
 394         list_for_each_entry(submit, &ring->submits, node) {
 395                 if (submit->seqno > fence)
 396                         break;
 397 
 398                 msm_update_fence(submit->ring->fctx,
 399                         submit->fence->seqno);
 400         }
 401 }
 402 
 403 static struct msm_gem_submit *
 404 find_submit(struct msm_ringbuffer *ring, uint32_t fence)
 405 {
 406         struct msm_gem_submit *submit;
 407 
 408         WARN_ON(!mutex_is_locked(&ring->gpu->dev->struct_mutex));
 409 
 410         list_for_each_entry(submit, &ring->submits, node)
 411                 if (submit->seqno == fence)
 412                         return submit;
 413 
 414         return NULL;
 415 }
 416 
 417 static void retire_submits(struct msm_gpu *gpu);
 418 
 419 static void recover_worker(struct work_struct *work)
 420 {
 421         struct msm_gpu *gpu = container_of(work, struct msm_gpu, recover_work);
 422         struct drm_device *dev = gpu->dev;
 423         struct msm_drm_private *priv = dev->dev_private;
 424         struct msm_gem_submit *submit;
 425         struct msm_ringbuffer *cur_ring = gpu->funcs->active_ring(gpu);
 426         char *comm = NULL, *cmd = NULL;
 427         int i;
 428 
 429         mutex_lock(&dev->struct_mutex);
 430 
 431         DRM_DEV_ERROR(dev->dev, "%s: hangcheck recover!\n", gpu->name);
 432 
 433         submit = find_submit(cur_ring, cur_ring->memptrs->fence + 1);
 434         if (submit) {
 435                 struct task_struct *task;
 436 
 437                 /* Increment the fault counts */
 438                 gpu->global_faults++;
 439                 submit->queue->faults++;
 440 
 441                 task = get_pid_task(submit->pid, PIDTYPE_PID);
 442                 if (task) {
 443                         comm = kstrdup(task->comm, GFP_KERNEL);
 444                         cmd = kstrdup_quotable_cmdline(task, GFP_KERNEL);
 445                         put_task_struct(task);
 446                 }
 447 
 448                 if (comm && cmd) {
 449                         DRM_DEV_ERROR(dev->dev, "%s: offending task: %s (%s)\n",
 450                                 gpu->name, comm, cmd);
 451 
 452                         msm_rd_dump_submit(priv->hangrd, submit,
 453                                 "offending task: %s (%s)", comm, cmd);
 454                 } else
 455                         msm_rd_dump_submit(priv->hangrd, submit, NULL);
 456         }
 457 
 458         /* Record the crash state */
 459         pm_runtime_get_sync(&gpu->pdev->dev);
 460         msm_gpu_crashstate_capture(gpu, submit, comm, cmd);
 461         pm_runtime_put_sync(&gpu->pdev->dev);
 462 
 463         kfree(cmd);
 464         kfree(comm);
 465 
 466         /*
 467          * Update all the rings with the latest and greatest fence.. this
 468          * needs to happen after msm_rd_dump_submit() to ensure that the
 469          * bo's referenced by the offending submit are still around.
 470          */
 471         for (i = 0; i < gpu->nr_rings; i++) {
 472                 struct msm_ringbuffer *ring = gpu->rb[i];
 473 
 474                 uint32_t fence = ring->memptrs->fence;
 475 
 476                 /*
 477                  * For the current (faulting?) ring/submit advance the fence by
 478                  * one more to clear the faulting submit
 479                  */
 480                 if (ring == cur_ring)
 481                         fence++;
 482 
 483                 update_fences(gpu, ring, fence);
 484         }
 485 
 486         if (msm_gpu_active(gpu)) {
 487                 /* retire completed submits, plus the one that hung: */
 488                 retire_submits(gpu);
 489 
 490                 pm_runtime_get_sync(&gpu->pdev->dev);
 491                 gpu->funcs->recover(gpu);
 492                 pm_runtime_put_sync(&gpu->pdev->dev);
 493 
 494                 /*
 495                  * Replay all remaining submits starting with highest priority
 496                  * ring
 497                  */
 498                 for (i = 0; i < gpu->nr_rings; i++) {
 499                         struct msm_ringbuffer *ring = gpu->rb[i];
 500 
 501                         list_for_each_entry(submit, &ring->submits, node)
 502                                 gpu->funcs->submit(gpu, submit, NULL);
 503                 }
 504         }
 505 
 506         mutex_unlock(&dev->struct_mutex);
 507 
 508         msm_gpu_retire(gpu);
 509 }
 510 
 511 static void hangcheck_timer_reset(struct msm_gpu *gpu)
 512 {
 513         DBG("%s", gpu->name);
 514         mod_timer(&gpu->hangcheck_timer,
 515                         round_jiffies_up(jiffies + DRM_MSM_HANGCHECK_JIFFIES));
 516 }
 517 
 518 static void hangcheck_handler(struct timer_list *t)
 519 {
 520         struct msm_gpu *gpu = from_timer(gpu, t, hangcheck_timer);
 521         struct drm_device *dev = gpu->dev;
 522         struct msm_drm_private *priv = dev->dev_private;
 523         struct msm_ringbuffer *ring = gpu->funcs->active_ring(gpu);
 524         uint32_t fence = ring->memptrs->fence;
 525 
 526         if (fence != ring->hangcheck_fence) {
 527                 /* some progress has been made.. ya! */
 528                 ring->hangcheck_fence = fence;
 529         } else if (fence < ring->seqno) {
 530                 /* no progress and not done.. hung! */
 531                 ring->hangcheck_fence = fence;
 532                 DRM_DEV_ERROR(dev->dev, "%s: hangcheck detected gpu lockup rb %d!\n",
 533                                 gpu->name, ring->id);
 534                 DRM_DEV_ERROR(dev->dev, "%s:     completed fence: %u\n",
 535                                 gpu->name, fence);
 536                 DRM_DEV_ERROR(dev->dev, "%s:     submitted fence: %u\n",
 537                                 gpu->name, ring->seqno);
 538 
 539                 queue_work(priv->wq, &gpu->recover_work);
 540         }
 541 
 542         /* if still more pending work, reset the hangcheck timer: */
 543         if (ring->seqno > ring->hangcheck_fence)
 544                 hangcheck_timer_reset(gpu);
 545 
 546         /* workaround for missing irq: */
 547         queue_work(priv->wq, &gpu->retire_work);
 548 }
 549 
 550 /*
 551  * Performance Counters:
 552  */
 553 
 554 /* called under perf_lock */
 555 static int update_hw_cntrs(struct msm_gpu *gpu, uint32_t ncntrs, uint32_t *cntrs)
 556 {
 557         uint32_t current_cntrs[ARRAY_SIZE(gpu->last_cntrs)];
 558         int i, n = min(ncntrs, gpu->num_perfcntrs);
 559 
 560         /* read current values: */
 561         for (i = 0; i < gpu->num_perfcntrs; i++)
 562                 current_cntrs[i] = gpu_read(gpu, gpu->perfcntrs[i].sample_reg);
 563 
 564         /* update cntrs: */
 565         for (i = 0; i < n; i++)
 566                 cntrs[i] = current_cntrs[i] - gpu->last_cntrs[i];
 567 
 568         /* save current values: */
 569         for (i = 0; i < gpu->num_perfcntrs; i++)
 570                 gpu->last_cntrs[i] = current_cntrs[i];
 571 
 572         return n;
 573 }
 574 
 575 static void update_sw_cntrs(struct msm_gpu *gpu)
 576 {
 577         ktime_t time;
 578         uint32_t elapsed;
 579         unsigned long flags;
 580 
 581         spin_lock_irqsave(&gpu->perf_lock, flags);
 582         if (!gpu->perfcntr_active)
 583                 goto out;
 584 
 585         time = ktime_get();
 586         elapsed = ktime_to_us(ktime_sub(time, gpu->last_sample.time));
 587 
 588         gpu->totaltime += elapsed;
 589         if (gpu->last_sample.active)
 590                 gpu->activetime += elapsed;
 591 
 592         gpu->last_sample.active = msm_gpu_active(gpu);
 593         gpu->last_sample.time = time;
 594 
 595 out:
 596         spin_unlock_irqrestore(&gpu->perf_lock, flags);
 597 }
 598 
 599 void msm_gpu_perfcntr_start(struct msm_gpu *gpu)
 600 {
 601         unsigned long flags;
 602 
 603         pm_runtime_get_sync(&gpu->pdev->dev);
 604 
 605         spin_lock_irqsave(&gpu->perf_lock, flags);
 606         /* we could dynamically enable/disable perfcntr registers too.. */
 607         gpu->last_sample.active = msm_gpu_active(gpu);
 608         gpu->last_sample.time = ktime_get();
 609         gpu->activetime = gpu->totaltime = 0;
 610         gpu->perfcntr_active = true;
 611         update_hw_cntrs(gpu, 0, NULL);
 612         spin_unlock_irqrestore(&gpu->perf_lock, flags);
 613 }
 614 
 615 void msm_gpu_perfcntr_stop(struct msm_gpu *gpu)
 616 {
 617         gpu->perfcntr_active = false;
 618         pm_runtime_put_sync(&gpu->pdev->dev);
 619 }
 620 
 621 /* returns -errno or # of cntrs sampled */
 622 int msm_gpu_perfcntr_sample(struct msm_gpu *gpu, uint32_t *activetime,
 623                 uint32_t *totaltime, uint32_t ncntrs, uint32_t *cntrs)
 624 {
 625         unsigned long flags;
 626         int ret;
 627 
 628         spin_lock_irqsave(&gpu->perf_lock, flags);
 629 
 630         if (!gpu->perfcntr_active) {
 631                 ret = -EINVAL;
 632                 goto out;
 633         }
 634 
 635         *activetime = gpu->activetime;
 636         *totaltime = gpu->totaltime;
 637 
 638         gpu->activetime = gpu->totaltime = 0;
 639 
 640         ret = update_hw_cntrs(gpu, ncntrs, cntrs);
 641 
 642 out:
 643         spin_unlock_irqrestore(&gpu->perf_lock, flags);
 644 
 645         return ret;
 646 }
 647 
 648 /*
 649  * Cmdstream submission/retirement:
 650  */
 651 
 652 static void retire_submit(struct msm_gpu *gpu, struct msm_ringbuffer *ring,
 653                 struct msm_gem_submit *submit)
 654 {
 655         int index = submit->seqno % MSM_GPU_SUBMIT_STATS_COUNT;
 656         volatile struct msm_gpu_submit_stats *stats;
 657         u64 elapsed, clock = 0;
 658         int i;
 659 
 660         stats = &ring->memptrs->stats[index];
 661         /* Convert 19.2Mhz alwayson ticks to nanoseconds for elapsed time */
 662         elapsed = (stats->alwayson_end - stats->alwayson_start) * 10000;
 663         do_div(elapsed, 192);
 664 
 665         /* Calculate the clock frequency from the number of CP cycles */
 666         if (elapsed) {
 667                 clock = (stats->cpcycles_end - stats->cpcycles_start) * 1000;
 668                 do_div(clock, elapsed);
 669         }
 670 
 671         trace_msm_gpu_submit_retired(submit, elapsed, clock,
 672                 stats->alwayson_start, stats->alwayson_end);
 673 
 674         for (i = 0; i < submit->nr_bos; i++) {
 675                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 676                 /* move to inactive: */
 677                 msm_gem_move_to_inactive(&msm_obj->base);
 678                 msm_gem_unpin_iova(&msm_obj->base, submit->aspace);
 679                 drm_gem_object_put(&msm_obj->base);
 680         }
 681 
 682         pm_runtime_mark_last_busy(&gpu->pdev->dev);
 683         pm_runtime_put_autosuspend(&gpu->pdev->dev);
 684         msm_gem_submit_free(submit);
 685 }
 686 
 687 static void retire_submits(struct msm_gpu *gpu)
 688 {
 689         struct drm_device *dev = gpu->dev;
 690         struct msm_gem_submit *submit, *tmp;
 691         int i;
 692 
 693         WARN_ON(!mutex_is_locked(&dev->struct_mutex));
 694 
 695         /* Retire the commits starting with highest priority */
 696         for (i = 0; i < gpu->nr_rings; i++) {
 697                 struct msm_ringbuffer *ring = gpu->rb[i];
 698 
 699                 list_for_each_entry_safe(submit, tmp, &ring->submits, node) {
 700                         if (dma_fence_is_signaled(submit->fence))
 701                                 retire_submit(gpu, ring, submit);
 702                 }
 703         }
 704 }
 705 
 706 static void retire_worker(struct work_struct *work)
 707 {
 708         struct msm_gpu *gpu = container_of(work, struct msm_gpu, retire_work);
 709         struct drm_device *dev = gpu->dev;
 710         int i;
 711 
 712         for (i = 0; i < gpu->nr_rings; i++)
 713                 update_fences(gpu, gpu->rb[i], gpu->rb[i]->memptrs->fence);
 714 
 715         mutex_lock(&dev->struct_mutex);
 716         retire_submits(gpu);
 717         mutex_unlock(&dev->struct_mutex);
 718 }
 719 
 720 /* call from irq handler to schedule work to retire bo's */
 721 void msm_gpu_retire(struct msm_gpu *gpu)
 722 {
 723         struct msm_drm_private *priv = gpu->dev->dev_private;
 724         queue_work(priv->wq, &gpu->retire_work);
 725         update_sw_cntrs(gpu);
 726 }
 727 
 728 /* add bo's to gpu's ring, and kick gpu: */
 729 void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
 730                 struct msm_file_private *ctx)
 731 {
 732         struct drm_device *dev = gpu->dev;
 733         struct msm_drm_private *priv = dev->dev_private;
 734         struct msm_ringbuffer *ring = submit->ring;
 735         int i;
 736 
 737         WARN_ON(!mutex_is_locked(&dev->struct_mutex));
 738 
 739         pm_runtime_get_sync(&gpu->pdev->dev);
 740 
 741         msm_gpu_hw_init(gpu);
 742 
 743         submit->seqno = ++ring->seqno;
 744 
 745         list_add_tail(&submit->node, &ring->submits);
 746 
 747         msm_rd_dump_submit(priv->rd, submit, NULL);
 748 
 749         update_sw_cntrs(gpu);
 750 
 751         for (i = 0; i < submit->nr_bos; i++) {
 752                 struct msm_gem_object *msm_obj = submit->bos[i].obj;
 753                 uint64_t iova;
 754 
 755                 /* can't happen yet.. but when we add 2d support we'll have
 756                  * to deal w/ cross-ring synchronization:
 757                  */
 758                 WARN_ON(is_active(msm_obj) && (msm_obj->gpu != gpu));
 759 
 760                 /* submit takes a reference to the bo and iova until retired: */
 761                 drm_gem_object_get(&msm_obj->base);
 762                 msm_gem_get_and_pin_iova(&msm_obj->base, submit->aspace, &iova);
 763 
 764                 if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE)
 765                         msm_gem_move_to_active(&msm_obj->base, gpu, true, submit->fence);
 766                 else if (submit->bos[i].flags & MSM_SUBMIT_BO_READ)
 767                         msm_gem_move_to_active(&msm_obj->base, gpu, false, submit->fence);
 768         }
 769 
 770         gpu->funcs->submit(gpu, submit, ctx);
 771         priv->lastctx = ctx;
 772 
 773         hangcheck_timer_reset(gpu);
 774 }
 775 
 776 /*
 777  * Init/Cleanup:
 778  */
 779 
 780 static irqreturn_t irq_handler(int irq, void *data)
 781 {
 782         struct msm_gpu *gpu = data;
 783         return gpu->funcs->irq(gpu);
 784 }
 785 
 786 static int get_clocks(struct platform_device *pdev, struct msm_gpu *gpu)
 787 {
 788         int ret = devm_clk_bulk_get_all(&pdev->dev, &gpu->grp_clks);
 789 
 790         if (ret < 1) {
 791                 gpu->nr_clocks = 0;
 792                 return ret;
 793         }
 794 
 795         gpu->nr_clocks = ret;
 796 
 797         gpu->core_clk = msm_clk_bulk_get_clock(gpu->grp_clks,
 798                 gpu->nr_clocks, "core");
 799 
 800         gpu->rbbmtimer_clk = msm_clk_bulk_get_clock(gpu->grp_clks,
 801                 gpu->nr_clocks, "rbbmtimer");
 802 
 803         return 0;
 804 }
 805 
 806 static struct msm_gem_address_space *
 807 msm_gpu_create_address_space(struct msm_gpu *gpu, struct platform_device *pdev,
 808                 uint64_t va_start, uint64_t va_end)
 809 {
 810         struct msm_gem_address_space *aspace;
 811         int ret;
 812 
 813         /*
 814          * Setup IOMMU.. eventually we will (I think) do this once per context
 815          * and have separate page tables per context.  For now, to keep things
 816          * simple and to get something working, just use a single address space:
 817          */
 818         if (!adreno_is_a2xx(to_adreno_gpu(gpu))) {
 819                 struct iommu_domain *iommu = iommu_domain_alloc(&platform_bus_type);
 820                 if (!iommu)
 821                         return NULL;
 822 
 823                 iommu->geometry.aperture_start = va_start;
 824                 iommu->geometry.aperture_end = va_end;
 825 
 826                 DRM_DEV_INFO(gpu->dev->dev, "%s: using IOMMU\n", gpu->name);
 827 
 828                 aspace = msm_gem_address_space_create(&pdev->dev, iommu, "gpu");
 829                 if (IS_ERR(aspace))
 830                         iommu_domain_free(iommu);
 831         } else {
 832                 aspace = msm_gem_address_space_create_a2xx(&pdev->dev, gpu, "gpu",
 833                         va_start, va_end);
 834         }
 835 
 836         if (IS_ERR(aspace)) {
 837                 DRM_DEV_ERROR(gpu->dev->dev, "failed to init mmu: %ld\n",
 838                         PTR_ERR(aspace));
 839                 return ERR_CAST(aspace);
 840         }
 841 
 842         ret = aspace->mmu->funcs->attach(aspace->mmu, NULL, 0);
 843         if (ret) {
 844                 msm_gem_address_space_put(aspace);
 845                 return ERR_PTR(ret);
 846         }
 847 
 848         return aspace;
 849 }
 850 
 851 int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 852                 struct msm_gpu *gpu, const struct msm_gpu_funcs *funcs,
 853                 const char *name, struct msm_gpu_config *config)
 854 {
 855         int i, ret, nr_rings = config->nr_rings;
 856         void *memptrs;
 857         uint64_t memptrs_iova;
 858 
 859         if (WARN_ON(gpu->num_perfcntrs > ARRAY_SIZE(gpu->last_cntrs)))
 860                 gpu->num_perfcntrs = ARRAY_SIZE(gpu->last_cntrs);
 861 
 862         gpu->dev = drm;
 863         gpu->funcs = funcs;
 864         gpu->name = name;
 865 
 866         INIT_LIST_HEAD(&gpu->active_list);
 867         INIT_WORK(&gpu->retire_work, retire_worker);
 868         INIT_WORK(&gpu->recover_work, recover_worker);
 869 
 870 
 871         timer_setup(&gpu->hangcheck_timer, hangcheck_handler, 0);
 872 
 873         spin_lock_init(&gpu->perf_lock);
 874 
 875 
 876         /* Map registers: */
 877         gpu->mmio = msm_ioremap(pdev, config->ioname, name);
 878         if (IS_ERR(gpu->mmio)) {
 879                 ret = PTR_ERR(gpu->mmio);
 880                 goto fail;
 881         }
 882 
 883         /* Get Interrupt: */
 884         gpu->irq = platform_get_irq(pdev, 0);
 885         if (gpu->irq < 0) {
 886                 ret = gpu->irq;
 887                 DRM_DEV_ERROR(drm->dev, "failed to get irq: %d\n", ret);
 888                 goto fail;
 889         }
 890 
 891         ret = devm_request_irq(&pdev->dev, gpu->irq, irq_handler,
 892                         IRQF_TRIGGER_HIGH, gpu->name, gpu);
 893         if (ret) {
 894                 DRM_DEV_ERROR(drm->dev, "failed to request IRQ%u: %d\n", gpu->irq, ret);
 895                 goto fail;
 896         }
 897 
 898         ret = get_clocks(pdev, gpu);
 899         if (ret)
 900                 goto fail;
 901 
 902         gpu->ebi1_clk = msm_clk_get(pdev, "bus");
 903         DBG("ebi1_clk: %p", gpu->ebi1_clk);
 904         if (IS_ERR(gpu->ebi1_clk))
 905                 gpu->ebi1_clk = NULL;
 906 
 907         /* Acquire regulators: */
 908         gpu->gpu_reg = devm_regulator_get(&pdev->dev, "vdd");
 909         DBG("gpu_reg: %p", gpu->gpu_reg);
 910         if (IS_ERR(gpu->gpu_reg))
 911                 gpu->gpu_reg = NULL;
 912 
 913         gpu->gpu_cx = devm_regulator_get(&pdev->dev, "vddcx");
 914         DBG("gpu_cx: %p", gpu->gpu_cx);
 915         if (IS_ERR(gpu->gpu_cx))
 916                 gpu->gpu_cx = NULL;
 917 
 918         gpu->pdev = pdev;
 919         platform_set_drvdata(pdev, gpu);
 920 
 921         msm_devfreq_init(gpu);
 922 
 923         gpu->aspace = msm_gpu_create_address_space(gpu, pdev,
 924                 config->va_start, config->va_end);
 925 
 926         if (gpu->aspace == NULL)
 927                 DRM_DEV_INFO(drm->dev, "%s: no IOMMU, fallback to VRAM carveout!\n", name);
 928         else if (IS_ERR(gpu->aspace)) {
 929                 ret = PTR_ERR(gpu->aspace);
 930                 goto fail;
 931         }
 932 
 933         memptrs = msm_gem_kernel_new(drm,
 934                 sizeof(struct msm_rbmemptrs) * nr_rings,
 935                 MSM_BO_UNCACHED, gpu->aspace, &gpu->memptrs_bo,
 936                 &memptrs_iova);
 937 
 938         if (IS_ERR(memptrs)) {
 939                 ret = PTR_ERR(memptrs);
 940                 DRM_DEV_ERROR(drm->dev, "could not allocate memptrs: %d\n", ret);
 941                 goto fail;
 942         }
 943 
 944         msm_gem_object_set_name(gpu->memptrs_bo, "memptrs");
 945 
 946         if (nr_rings > ARRAY_SIZE(gpu->rb)) {
 947                 DRM_DEV_INFO_ONCE(drm->dev, "Only creating %zu ringbuffers\n",
 948                         ARRAY_SIZE(gpu->rb));
 949                 nr_rings = ARRAY_SIZE(gpu->rb);
 950         }
 951 
 952         /* Create ringbuffer(s): */
 953         for (i = 0; i < nr_rings; i++) {
 954                 gpu->rb[i] = msm_ringbuffer_new(gpu, i, memptrs, memptrs_iova);
 955 
 956                 if (IS_ERR(gpu->rb[i])) {
 957                         ret = PTR_ERR(gpu->rb[i]);
 958                         DRM_DEV_ERROR(drm->dev,
 959                                 "could not create ringbuffer %d: %d\n", i, ret);
 960                         goto fail;
 961                 }
 962 
 963                 memptrs += sizeof(struct msm_rbmemptrs);
 964                 memptrs_iova += sizeof(struct msm_rbmemptrs);
 965         }
 966 
 967         gpu->nr_rings = nr_rings;
 968 
 969         return 0;
 970 
 971 fail:
 972         for (i = 0; i < ARRAY_SIZE(gpu->rb); i++)  {
 973                 msm_ringbuffer_destroy(gpu->rb[i]);
 974                 gpu->rb[i] = NULL;
 975         }
 976 
 977         msm_gem_kernel_put(gpu->memptrs_bo, gpu->aspace, false);
 978 
 979         platform_set_drvdata(pdev, NULL);
 980         return ret;
 981 }
 982 
 983 void msm_gpu_cleanup(struct msm_gpu *gpu)
 984 {
 985         int i;
 986 
 987         DBG("%s", gpu->name);
 988 
 989         WARN_ON(!list_empty(&gpu->active_list));
 990 
 991         for (i = 0; i < ARRAY_SIZE(gpu->rb); i++) {
 992                 msm_ringbuffer_destroy(gpu->rb[i]);
 993                 gpu->rb[i] = NULL;
 994         }
 995 
 996         msm_gem_kernel_put(gpu->memptrs_bo, gpu->aspace, false);
 997 
 998         if (!IS_ERR_OR_NULL(gpu->aspace)) {
 999                 gpu->aspace->mmu->funcs->detach(gpu->aspace->mmu,
1000                         NULL, 0);
1001                 msm_gem_address_space_put(gpu->aspace);
1002         }
1003 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/gpu/drm/msm/msm_gpu.c

DEFINITIONS
