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v6.13.7
   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
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  25static 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
  49static 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
  58static 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
  70static 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
  88static int enable_axi(struct msm_gpu *gpu)
  89{
  90	return clk_prepare_enable(gpu->ebi1_clk);
 
 
  91}
  92
  93static int disable_axi(struct msm_gpu *gpu)
  94{
  95	clk_disable_unprepare(gpu->ebi1_clk);
 
  96	return 0;
  97}
  98
 
 
 
 
 
 
 
 
  99int 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
 125int 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
 151void 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
 159int 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
 178static 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
 214static void msm_gpu_devcoredump_free(void *data)
 215{
 216	struct msm_gpu *gpu = data;
 217
 218	msm_gpu_crashstate_put(gpu);
 219}
 220
 221static 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	struct msm_gem_object *msm_obj = to_msm_bo(obj);
 226
 227	/* Don't record write only objects */
 228	state_bo->size = obj->size;
 229	state_bo->flags = msm_obj->flags;
 230	state_bo->iova = iova;
 231
 232	BUILD_BUG_ON(sizeof(state_bo->name) != sizeof(msm_obj->name));
 233
 234	memcpy(state_bo->name, msm_obj->name, sizeof(state_bo->name));
 235
 236	if (full) {
 237		void *ptr;
 238
 239		state_bo->data = kvmalloc(obj->size, GFP_KERNEL);
 240		if (!state_bo->data)
 241			goto out;
 242
 243		msm_gem_lock(obj);
 244		ptr = msm_gem_get_vaddr_active(obj);
 245		msm_gem_unlock(obj);
 246		if (IS_ERR(ptr)) {
 247			kvfree(state_bo->data);
 248			state_bo->data = NULL;
 249			goto out;
 250		}
 251
 252		memcpy(state_bo->data, ptr, obj->size);
 253		msm_gem_put_vaddr(obj);
 254	}
 255out:
 256	state->nr_bos++;
 257}
 258
 259static void msm_gpu_crashstate_capture(struct msm_gpu *gpu,
 260		struct msm_gem_submit *submit, char *comm, char *cmd)
 261{
 262	struct msm_gpu_state *state;
 263
 264	/* Check if the target supports capturing crash state */
 265	if (!gpu->funcs->gpu_state_get)
 266		return;
 267
 268	/* Only save one crash state at a time */
 269	if (gpu->crashstate)
 270		return;
 271
 272	state = gpu->funcs->gpu_state_get(gpu);
 273	if (IS_ERR_OR_NULL(state))
 274		return;
 275
 276	/* Fill in the additional crash state information */
 277	state->comm = kstrdup(comm, GFP_KERNEL);
 278	state->cmd = kstrdup(cmd, GFP_KERNEL);
 279	state->fault_info = gpu->fault_info;
 280
 281	if (submit) {
 282		int i;
 283
 284		state->bos = kcalloc(submit->nr_bos,
 285			sizeof(struct msm_gpu_state_bo), GFP_KERNEL);
 286
 287		for (i = 0; state->bos && i < submit->nr_bos; i++) {
 288			msm_gpu_crashstate_get_bo(state, submit->bos[i].obj,
 289						  submit->bos[i].iova,
 290						  should_dump(submit, i));
 
 291		}
 292	}
 293
 294	/* Set the active crash state to be dumped on failure */
 295	gpu->crashstate = state;
 296
 297	dev_coredumpm(&gpu->pdev->dev, THIS_MODULE, gpu, 0, GFP_KERNEL,
 
 298		msm_gpu_devcoredump_read, msm_gpu_devcoredump_free);
 299}
 300#else
 301static void msm_gpu_crashstate_capture(struct msm_gpu *gpu,
 302		struct msm_gem_submit *submit, char *comm, char *cmd)
 303{
 304}
 305#endif
 306
 307/*
 308 * Hangcheck detection for locked gpu:
 309 */
 310
 311static struct msm_gem_submit *
 312find_submit(struct msm_ringbuffer *ring, uint32_t fence)
 313{
 314	struct msm_gem_submit *submit;
 315	unsigned long flags;
 316
 317	spin_lock_irqsave(&ring->submit_lock, flags);
 318	list_for_each_entry(submit, &ring->submits, node) {
 319		if (submit->seqno == fence) {
 320			spin_unlock_irqrestore(&ring->submit_lock, flags);
 321			return submit;
 322		}
 323	}
 324	spin_unlock_irqrestore(&ring->submit_lock, flags);
 325
 326	return NULL;
 
 
 327}
 328
 329static void retire_submits(struct msm_gpu *gpu);
 330
 331static void get_comm_cmdline(struct msm_gem_submit *submit, char **comm, char **cmd)
 332{
 333	struct msm_file_private *ctx = submit->queue->ctx;
 334	struct task_struct *task;
 335
 336	WARN_ON(!mutex_is_locked(&submit->gpu->lock));
 337
 338	/* Note that kstrdup will return NULL if argument is NULL: */
 339	*comm = kstrdup(ctx->comm, GFP_KERNEL);
 340	*cmd  = kstrdup(ctx->cmdline, GFP_KERNEL);
 341
 342	task = get_pid_task(submit->pid, PIDTYPE_PID);
 343	if (!task)
 344		return;
 345
 346	if (!*comm)
 347		*comm = kstrdup(task->comm, GFP_KERNEL);
 348
 349	if (!*cmd)
 350		*cmd = kstrdup_quotable_cmdline(task, GFP_KERNEL);
 
 351
 352	put_task_struct(task);
 353}
 354
 355static void recover_worker(struct kthread_work *work)
 
 
 356{
 357	struct msm_gpu *gpu = container_of(work, struct msm_gpu, recover_work);
 358	struct drm_device *dev = gpu->dev;
 359	struct msm_drm_private *priv = dev->dev_private;
 360	struct msm_gem_submit *submit;
 361	struct msm_ringbuffer *cur_ring = gpu->funcs->active_ring(gpu);
 362	char *comm = NULL, *cmd = NULL;
 363	int i;
 364
 365	mutex_lock(&gpu->lock);
 366
 367	DRM_DEV_ERROR(dev->dev, "%s: hangcheck recover!\n", gpu->name);
 368
 369	submit = find_submit(cur_ring, cur_ring->memptrs->fence + 1);
 
 
 370
 371	/*
 372	 * If the submit retired while we were waiting for the worker to run,
 373	 * or waiting to acquire the gpu lock, then nothing more to do.
 374	 */
 375	if (!submit)
 376		goto out_unlock;
 377
 378	/* Increment the fault counts */
 379	submit->queue->faults++;
 380	if (submit->aspace)
 381		submit->aspace->faults++;
 382
 383	get_comm_cmdline(submit, &comm, &cmd);
 384
 385	if (comm && cmd) {
 386		DRM_DEV_ERROR(dev->dev, "%s: offending task: %s (%s)\n",
 387			      gpu->name, comm, cmd);
 388
 389		msm_rd_dump_submit(priv->hangrd, submit,
 390				   "offending task: %s (%s)", comm, cmd);
 391	} else {
 392		DRM_DEV_ERROR(dev->dev, "%s: offending task: unknown\n", gpu->name);
 393
 394		msm_rd_dump_submit(priv->hangrd, submit, NULL);
 
 
 
 
 
 
 
 395	}
 396
 397	/* Record the crash state */
 398	pm_runtime_get_sync(&gpu->pdev->dev);
 399	msm_gpu_crashstate_capture(gpu, submit, comm, cmd);
 
 400
 401	kfree(cmd);
 402	kfree(comm);
 403
 404	/*
 405	 * Update all the rings with the latest and greatest fence.. this
 406	 * needs to happen after msm_rd_dump_submit() to ensure that the
 407	 * bo's referenced by the offending submit are still around.
 408	 */
 409	for (i = 0; i < gpu->nr_rings; i++) {
 410		struct msm_ringbuffer *ring = gpu->rb[i];
 411
 412		uint32_t fence = ring->memptrs->fence;
 413
 414		/*
 415		 * For the current (faulting?) ring/submit advance the fence by
 416		 * one more to clear the faulting submit
 417		 */
 418		if (ring == cur_ring)
 419			ring->memptrs->fence = ++fence;
 420
 421		msm_update_fence(ring->fctx, fence);
 422	}
 423
 424	if (msm_gpu_active(gpu)) {
 425		/* retire completed submits, plus the one that hung: */
 426		retire_submits(gpu);
 427
 
 428		gpu->funcs->recover(gpu);
 
 429
 430		/*
 431		 * Replay all remaining submits starting with highest priority
 432		 * ring
 433		 */
 434		for (i = 0; i < gpu->nr_rings; i++) {
 435			struct msm_ringbuffer *ring = gpu->rb[i];
 436			unsigned long flags;
 437
 438			spin_lock_irqsave(&ring->submit_lock, flags);
 439			list_for_each_entry(submit, &ring->submits, node)
 440				gpu->funcs->submit(gpu, submit);
 441			spin_unlock_irqrestore(&ring->submit_lock, flags);
 442		}
 443	}
 444
 445	pm_runtime_put(&gpu->pdev->dev);
 446
 447out_unlock:
 448	mutex_unlock(&gpu->lock);
 449
 450	msm_gpu_retire(gpu);
 451}
 452
 453static void fault_worker(struct kthread_work *work)
 454{
 455	struct msm_gpu *gpu = container_of(work, struct msm_gpu, fault_work);
 456	struct msm_gem_submit *submit;
 457	struct msm_ringbuffer *cur_ring = gpu->funcs->active_ring(gpu);
 458	char *comm = NULL, *cmd = NULL;
 459
 460	mutex_lock(&gpu->lock);
 461
 462	submit = find_submit(cur_ring, cur_ring->memptrs->fence + 1);
 463	if (submit && submit->fault_dumped)
 464		goto resume_smmu;
 465
 466	if (submit) {
 467		get_comm_cmdline(submit, &comm, &cmd);
 468
 469		/*
 470		 * When we get GPU iova faults, we can get 1000s of them,
 471		 * but we really only want to log the first one.
 472		 */
 473		submit->fault_dumped = true;
 474	}
 475
 476	/* Record the crash state */
 477	pm_runtime_get_sync(&gpu->pdev->dev);
 478	msm_gpu_crashstate_capture(gpu, submit, comm, cmd);
 479	pm_runtime_put_sync(&gpu->pdev->dev);
 480
 481	kfree(cmd);
 482	kfree(comm);
 483
 484resume_smmu:
 485	memset(&gpu->fault_info, 0, sizeof(gpu->fault_info));
 486	gpu->aspace->mmu->funcs->resume_translation(gpu->aspace->mmu);
 487
 488	mutex_unlock(&gpu->lock);
 489}
 490
 491static void hangcheck_timer_reset(struct msm_gpu *gpu)
 492{
 493	struct msm_drm_private *priv = gpu->dev->dev_private;
 494	mod_timer(&gpu->hangcheck_timer,
 495			round_jiffies_up(jiffies + msecs_to_jiffies(priv->hangcheck_period)));
 496}
 497
 498static bool made_progress(struct msm_gpu *gpu, struct msm_ringbuffer *ring)
 499{
 500	if (ring->hangcheck_progress_retries >= DRM_MSM_HANGCHECK_PROGRESS_RETRIES)
 501		return false;
 502
 503	if (!gpu->funcs->progress)
 504		return false;
 505
 506	if (!gpu->funcs->progress(gpu, ring))
 507		return false;
 508
 509	ring->hangcheck_progress_retries++;
 510	return true;
 511}
 512
 513static void hangcheck_handler(struct timer_list *t)
 514{
 515	struct msm_gpu *gpu = from_timer(gpu, t, hangcheck_timer);
 516	struct drm_device *dev = gpu->dev;
 
 517	struct msm_ringbuffer *ring = gpu->funcs->active_ring(gpu);
 518	uint32_t fence = ring->memptrs->fence;
 519
 520	if (fence != ring->hangcheck_fence) {
 521		/* some progress has been made.. ya! */
 522		ring->hangcheck_fence = fence;
 523		ring->hangcheck_progress_retries = 0;
 524	} else if (fence_before(fence, ring->fctx->last_fence) &&
 525			!made_progress(gpu, ring)) {
 526		/* no progress and not done.. hung! */
 527		ring->hangcheck_fence = fence;
 528		ring->hangcheck_progress_retries = 0;
 529		DRM_DEV_ERROR(dev->dev, "%s: hangcheck detected gpu lockup rb %d!\n",
 530				gpu->name, ring->id);
 531		DRM_DEV_ERROR(dev->dev, "%s:     completed fence: %u\n",
 532				gpu->name, fence);
 533		DRM_DEV_ERROR(dev->dev, "%s:     submitted fence: %u\n",
 534				gpu->name, ring->fctx->last_fence);
 535
 536		kthread_queue_work(gpu->worker, &gpu->recover_work);
 537	}
 538
 539	/* if still more pending work, reset the hangcheck timer: */
 540	if (fence_after(ring->fctx->last_fence, ring->hangcheck_fence))
 541		hangcheck_timer_reset(gpu);
 542
 543	/* workaround for missing irq: */
 544	msm_gpu_retire(gpu);
 545}
 546
 547/*
 548 * Performance Counters:
 549 */
 550
 551/* called under perf_lock */
 552static int update_hw_cntrs(struct msm_gpu *gpu, uint32_t ncntrs, uint32_t *cntrs)
 553{
 554	uint32_t current_cntrs[ARRAY_SIZE(gpu->last_cntrs)];
 555	int i, n = min(ncntrs, gpu->num_perfcntrs);
 556
 557	/* read current values: */
 558	for (i = 0; i < gpu->num_perfcntrs; i++)
 559		current_cntrs[i] = gpu_read(gpu, gpu->perfcntrs[i].sample_reg);
 560
 561	/* update cntrs: */
 562	for (i = 0; i < n; i++)
 563		cntrs[i] = current_cntrs[i] - gpu->last_cntrs[i];
 564
 565	/* save current values: */
 566	for (i = 0; i < gpu->num_perfcntrs; i++)
 567		gpu->last_cntrs[i] = current_cntrs[i];
 568
 569	return n;
 570}
 571
 572static void update_sw_cntrs(struct msm_gpu *gpu)
 573{
 574	ktime_t time;
 575	uint32_t elapsed;
 576	unsigned long flags;
 577
 578	spin_lock_irqsave(&gpu->perf_lock, flags);
 579	if (!gpu->perfcntr_active)
 580		goto out;
 581
 582	time = ktime_get();
 583	elapsed = ktime_to_us(ktime_sub(time, gpu->last_sample.time));
 584
 585	gpu->totaltime += elapsed;
 586	if (gpu->last_sample.active)
 587		gpu->activetime += elapsed;
 588
 589	gpu->last_sample.active = msm_gpu_active(gpu);
 590	gpu->last_sample.time = time;
 591
 592out:
 593	spin_unlock_irqrestore(&gpu->perf_lock, flags);
 594}
 595
 596void msm_gpu_perfcntr_start(struct msm_gpu *gpu)
 597{
 598	unsigned long flags;
 599
 600	pm_runtime_get_sync(&gpu->pdev->dev);
 601
 602	spin_lock_irqsave(&gpu->perf_lock, flags);
 603	/* we could dynamically enable/disable perfcntr registers too.. */
 604	gpu->last_sample.active = msm_gpu_active(gpu);
 605	gpu->last_sample.time = ktime_get();
 606	gpu->activetime = gpu->totaltime = 0;
 607	gpu->perfcntr_active = true;
 608	update_hw_cntrs(gpu, 0, NULL);
 609	spin_unlock_irqrestore(&gpu->perf_lock, flags);
 610}
 611
 612void msm_gpu_perfcntr_stop(struct msm_gpu *gpu)
 613{
 614	gpu->perfcntr_active = false;
 615	pm_runtime_put_sync(&gpu->pdev->dev);
 616}
 617
 618/* returns -errno or # of cntrs sampled */
 619int msm_gpu_perfcntr_sample(struct msm_gpu *gpu, uint32_t *activetime,
 620		uint32_t *totaltime, uint32_t ncntrs, uint32_t *cntrs)
 621{
 622	unsigned long flags;
 623	int ret;
 624
 625	spin_lock_irqsave(&gpu->perf_lock, flags);
 626
 627	if (!gpu->perfcntr_active) {
 628		ret = -EINVAL;
 629		goto out;
 630	}
 631
 632	*activetime = gpu->activetime;
 633	*totaltime = gpu->totaltime;
 634
 635	gpu->activetime = gpu->totaltime = 0;
 636
 637	ret = update_hw_cntrs(gpu, ncntrs, cntrs);
 638
 639out:
 640	spin_unlock_irqrestore(&gpu->perf_lock, flags);
 641
 642	return ret;
 643}
 644
 645/*
 646 * Cmdstream submission/retirement:
 647 */
 648
 649static void retire_submit(struct msm_gpu *gpu, struct msm_ringbuffer *ring,
 650		struct msm_gem_submit *submit)
 651{
 652	int index = submit->seqno % MSM_GPU_SUBMIT_STATS_COUNT;
 653	volatile struct msm_gpu_submit_stats *stats;
 654	u64 elapsed, clock = 0, cycles;
 655	unsigned long flags;
 656
 657	stats = &ring->memptrs->stats[index];
 658	/* Convert 19.2Mhz alwayson ticks to nanoseconds for elapsed time */
 659	elapsed = (stats->alwayson_end - stats->alwayson_start) * 10000;
 660	do_div(elapsed, 192);
 661
 662	cycles = stats->cpcycles_end - stats->cpcycles_start;
 663
 664	/* Calculate the clock frequency from the number of CP cycles */
 665	if (elapsed) {
 666		clock = cycles * 1000;
 667		do_div(clock, elapsed);
 668	}
 669
 670	submit->queue->ctx->elapsed_ns += elapsed;
 671	submit->queue->ctx->cycles     += cycles;
 672
 673	trace_msm_gpu_submit_retired(submit, elapsed, clock,
 674		stats->alwayson_start, stats->alwayson_end);
 675
 676	msm_submit_retire(submit);
 677
 678	pm_runtime_mark_last_busy(&gpu->pdev->dev);
 679
 680	spin_lock_irqsave(&ring->submit_lock, flags);
 681	list_del(&submit->node);
 682	spin_unlock_irqrestore(&ring->submit_lock, flags);
 683
 684	/* Update devfreq on transition from active->idle: */
 685	mutex_lock(&gpu->active_lock);
 686	gpu->active_submits--;
 687	WARN_ON(gpu->active_submits < 0);
 688	if (!gpu->active_submits) {
 689		msm_devfreq_idle(gpu);
 690		pm_runtime_put_autosuspend(&gpu->pdev->dev);
 691	}
 692
 693	mutex_unlock(&gpu->active_lock);
 694
 695	msm_gem_submit_put(submit);
 696}
 697
 698static void retire_submits(struct msm_gpu *gpu)
 699{
 
 
 700	int i;
 701
 
 
 702	/* Retire the commits starting with highest priority */
 703	for (i = 0; i < gpu->nr_rings; i++) {
 704		struct msm_ringbuffer *ring = gpu->rb[i];
 705
 706		while (true) {
 707			struct msm_gem_submit *submit = NULL;
 708			unsigned long flags;
 709
 710			spin_lock_irqsave(&ring->submit_lock, flags);
 711			submit = list_first_entry_or_null(&ring->submits,
 712					struct msm_gem_submit, node);
 713			spin_unlock_irqrestore(&ring->submit_lock, flags);
 714
 715			/*
 716			 * If no submit, we are done.  If submit->fence hasn't
 717			 * been signalled, then later submits are not signalled
 718			 * either, so we are also done.
 719			 */
 720			if (submit && dma_fence_is_signaled(submit->hw_fence)) {
 721				retire_submit(gpu, ring, submit);
 722			} else {
 723				break;
 724			}
 725		}
 726	}
 727
 728	wake_up_all(&gpu->retire_event);
 729}
 730
 731static void retire_worker(struct kthread_work *work)
 732{
 733	struct msm_gpu *gpu = container_of(work, struct msm_gpu, retire_work);
 
 
 
 
 
 734
 
 735	retire_submits(gpu);
 
 736}
 737
 738/* call from irq handler to schedule work to retire bo's */
 739void msm_gpu_retire(struct msm_gpu *gpu)
 740{
 741	int i;
 742
 743	for (i = 0; i < gpu->nr_rings; i++)
 744		msm_update_fence(gpu->rb[i]->fctx, gpu->rb[i]->memptrs->fence);
 745
 746	kthread_queue_work(gpu->worker, &gpu->retire_work);
 747	update_sw_cntrs(gpu);
 748}
 749
 750/* add bo's to gpu's ring, and kick gpu: */
 751void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
 
 752{
 
 
 753	struct msm_ringbuffer *ring = submit->ring;
 754	unsigned long flags;
 755
 756	WARN_ON(!mutex_is_locked(&gpu->lock));
 757
 758	pm_runtime_get_sync(&gpu->pdev->dev);
 759
 760	msm_gpu_hw_init(gpu);
 761
 762	submit->seqno = submit->hw_fence->seqno;
 
 
 
 
 763
 764	update_sw_cntrs(gpu);
 765
 766	/*
 767	 * ring->submits holds a ref to the submit, to deal with the case
 768	 * that a submit completes before msm_ioctl_gem_submit() returns.
 769	 */
 770	msm_gem_submit_get(submit);
 771
 772	spin_lock_irqsave(&ring->submit_lock, flags);
 773	list_add_tail(&submit->node, &ring->submits);
 774	spin_unlock_irqrestore(&ring->submit_lock, flags);
 
 
 
 
 
 775
 776	/* Update devfreq on transition from idle->active: */
 777	mutex_lock(&gpu->active_lock);
 778	if (!gpu->active_submits) {
 779		pm_runtime_get(&gpu->pdev->dev);
 780		msm_devfreq_active(gpu);
 781	}
 782	gpu->active_submits++;
 783	mutex_unlock(&gpu->active_lock);
 784
 785	gpu->funcs->submit(gpu, submit);
 786	submit->ring->cur_ctx_seqno = submit->queue->ctx->seqno;
 787
 788	pm_runtime_put(&gpu->pdev->dev);
 789	hangcheck_timer_reset(gpu);
 790}
 791
 792/*
 793 * Init/Cleanup:
 794 */
 795
 796static irqreturn_t irq_handler(int irq, void *data)
 797{
 798	struct msm_gpu *gpu = data;
 799	return gpu->funcs->irq(gpu);
 800}
 801
 802static int get_clocks(struct platform_device *pdev, struct msm_gpu *gpu)
 803{
 804	int ret = devm_clk_bulk_get_all(&pdev->dev, &gpu->grp_clks);
 805
 806	if (ret < 1) {
 807		gpu->nr_clocks = 0;
 808		return ret;
 809	}
 810
 811	gpu->nr_clocks = ret;
 812
 813	gpu->core_clk = msm_clk_bulk_get_clock(gpu->grp_clks,
 814		gpu->nr_clocks, "core");
 815
 816	gpu->rbbmtimer_clk = msm_clk_bulk_get_clock(gpu->grp_clks,
 817		gpu->nr_clocks, "rbbmtimer");
 818
 819	return 0;
 820}
 821
 822/* Return a new address space for a msm_drm_private instance */
 823struct msm_gem_address_space *
 824msm_gpu_create_private_address_space(struct msm_gpu *gpu, struct task_struct *task)
 825{
 826	struct msm_gem_address_space *aspace = NULL;
 827	if (!gpu)
 828		return NULL;
 829
 830	/*
 831	 * If the target doesn't support private address spaces then return
 832	 * the global one
 
 833	 */
 834	if (gpu->funcs->create_private_address_space) {
 835		aspace = gpu->funcs->create_private_address_space(gpu);
 836		if (!IS_ERR(aspace))
 837			aspace->pid = get_pid(task_pid(task));
 
 
 
 
 
 
 
 
 
 
 
 
 838	}
 839
 840	if (IS_ERR_OR_NULL(aspace))
 841		aspace = msm_gem_address_space_get(gpu->aspace);
 
 
 
 
 
 
 
 
 
 842
 843	return aspace;
 844}
 845
 846int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 847		struct msm_gpu *gpu, const struct msm_gpu_funcs *funcs,
 848		const char *name, struct msm_gpu_config *config)
 849{
 850	struct msm_drm_private *priv = drm->dev_private;
 851	int i, ret, nr_rings = config->nr_rings;
 852	void *memptrs;
 853	uint64_t memptrs_iova;
 854
 855	if (WARN_ON(gpu->num_perfcntrs > ARRAY_SIZE(gpu->last_cntrs)))
 856		gpu->num_perfcntrs = ARRAY_SIZE(gpu->last_cntrs);
 857
 858	gpu->dev = drm;
 859	gpu->funcs = funcs;
 860	gpu->name = name;
 861
 862	gpu->worker = kthread_create_worker(0, "gpu-worker");
 863	if (IS_ERR(gpu->worker)) {
 864		ret = PTR_ERR(gpu->worker);
 865		gpu->worker = NULL;
 866		goto fail;
 867	}
 868
 869	sched_set_fifo_low(gpu->worker->task);
 870
 871	mutex_init(&gpu->active_lock);
 872	mutex_init(&gpu->lock);
 873	init_waitqueue_head(&gpu->retire_event);
 874	kthread_init_work(&gpu->retire_work, retire_worker);
 875	kthread_init_work(&gpu->recover_work, recover_worker);
 876	kthread_init_work(&gpu->fault_work, fault_worker);
 877
 878	priv->hangcheck_period = DRM_MSM_HANGCHECK_DEFAULT_PERIOD;
 879
 880	/*
 881	 * If progress detection is supported, halve the hangcheck timer
 882	 * duration, as it takes two iterations of the hangcheck handler
 883	 * to detect a hang.
 884	 */
 885	if (funcs->progress)
 886		priv->hangcheck_period /= 2;
 887
 888	timer_setup(&gpu->hangcheck_timer, hangcheck_handler, 0);
 889
 890	spin_lock_init(&gpu->perf_lock);
 891
 892
 893	/* Map registers: */
 894	gpu->mmio = msm_ioremap(pdev, config->ioname);
 895	if (IS_ERR(gpu->mmio)) {
 896		ret = PTR_ERR(gpu->mmio);
 897		goto fail;
 898	}
 899
 900	/* Get Interrupt: */
 901	gpu->irq = platform_get_irq(pdev, 0);
 902	if (gpu->irq < 0) {
 903		ret = gpu->irq;
 
 904		goto fail;
 905	}
 906
 907	ret = devm_request_irq(&pdev->dev, gpu->irq, irq_handler,
 908			IRQF_TRIGGER_HIGH, "gpu-irq", gpu);
 909	if (ret) {
 910		DRM_DEV_ERROR(drm->dev, "failed to request IRQ%u: %d\n", gpu->irq, ret);
 911		goto fail;
 912	}
 913
 914	ret = get_clocks(pdev, gpu);
 915	if (ret)
 916		goto fail;
 917
 918	gpu->ebi1_clk = msm_clk_get(pdev, "bus");
 919	DBG("ebi1_clk: %p", gpu->ebi1_clk);
 920	if (IS_ERR(gpu->ebi1_clk))
 921		gpu->ebi1_clk = NULL;
 922
 923	/* Acquire regulators: */
 924	gpu->gpu_reg = devm_regulator_get(&pdev->dev, "vdd");
 925	DBG("gpu_reg: %p", gpu->gpu_reg);
 926	if (IS_ERR(gpu->gpu_reg))
 927		gpu->gpu_reg = NULL;
 928
 929	gpu->gpu_cx = devm_regulator_get(&pdev->dev, "vddcx");
 930	DBG("gpu_cx: %p", gpu->gpu_cx);
 931	if (IS_ERR(gpu->gpu_cx))
 932		gpu->gpu_cx = NULL;
 933
 934	platform_set_drvdata(pdev, &gpu->adreno_smmu);
 
 935
 936	msm_devfreq_init(gpu);
 937
 938
 939	gpu->aspace = gpu->funcs->create_address_space(gpu, pdev);
 940
 941	if (gpu->aspace == NULL)
 942		DRM_DEV_INFO(drm->dev, "%s: no IOMMU, fallback to VRAM carveout!\n", name);
 943	else if (IS_ERR(gpu->aspace)) {
 944		ret = PTR_ERR(gpu->aspace);
 945		goto fail;
 946	}
 947
 948	memptrs = msm_gem_kernel_new(drm,
 949		sizeof(struct msm_rbmemptrs) * nr_rings,
 950		check_apriv(gpu, MSM_BO_WC), gpu->aspace, &gpu->memptrs_bo,
 951		&memptrs_iova);
 952
 953	if (IS_ERR(memptrs)) {
 954		ret = PTR_ERR(memptrs);
 955		DRM_DEV_ERROR(drm->dev, "could not allocate memptrs: %d\n", ret);
 956		goto fail;
 957	}
 958
 959	msm_gem_object_set_name(gpu->memptrs_bo, "memptrs");
 960
 961	if (nr_rings > ARRAY_SIZE(gpu->rb)) {
 962		DRM_DEV_INFO_ONCE(drm->dev, "Only creating %zu ringbuffers\n",
 963			ARRAY_SIZE(gpu->rb));
 964		nr_rings = ARRAY_SIZE(gpu->rb);
 965	}
 966
 967	/* Create ringbuffer(s): */
 968	for (i = 0; i < nr_rings; i++) {
 969		gpu->rb[i] = msm_ringbuffer_new(gpu, i, memptrs, memptrs_iova);
 970
 971		if (IS_ERR(gpu->rb[i])) {
 972			ret = PTR_ERR(gpu->rb[i]);
 973			DRM_DEV_ERROR(drm->dev,
 974				"could not create ringbuffer %d: %d\n", i, ret);
 975			goto fail;
 976		}
 977
 978		memptrs += sizeof(struct msm_rbmemptrs);
 979		memptrs_iova += sizeof(struct msm_rbmemptrs);
 980	}
 981
 982	gpu->nr_rings = nr_rings;
 983
 984	refcount_set(&gpu->sysprof_active, 1);
 985
 986	return 0;
 987
 988fail:
 989	for (i = 0; i < ARRAY_SIZE(gpu->rb); i++)  {
 990		msm_ringbuffer_destroy(gpu->rb[i]);
 991		gpu->rb[i] = NULL;
 992	}
 993
 994	msm_gem_kernel_put(gpu->memptrs_bo, gpu->aspace);
 995
 996	platform_set_drvdata(pdev, NULL);
 997	return ret;
 998}
 999
1000void msm_gpu_cleanup(struct msm_gpu *gpu)
1001{
1002	int i;
1003
1004	DBG("%s", gpu->name);
1005
 
 
1006	for (i = 0; i < ARRAY_SIZE(gpu->rb); i++) {
1007		msm_ringbuffer_destroy(gpu->rb[i]);
1008		gpu->rb[i] = NULL;
1009	}
1010
1011	msm_gem_kernel_put(gpu->memptrs_bo, gpu->aspace);
1012
1013	if (!IS_ERR_OR_NULL(gpu->aspace)) {
1014		gpu->aspace->mmu->funcs->detach(gpu->aspace->mmu);
 
1015		msm_gem_address_space_put(gpu->aspace);
1016	}
1017
1018	if (gpu->worker) {
1019		kthread_destroy_worker(gpu->worker);
1020	}
1021
1022	msm_devfreq_cleanup(gpu);
1023
1024	platform_set_drvdata(gpu->pdev, NULL);
1025}
v5.4
   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
  20/*
  21 * Power Management:
  22 */
  23
  24static 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, (u64)*freq);
  37	else
  38		clk_set_rate(gpu->core_clk, *freq);
  39
  40	dev_pm_opp_put(opp);
  41
  42	return 0;
  43}
  44
  45static 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
  65static 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
  77static 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
  84static 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	 */
  96
  97	gpu->devfreq.devfreq = devm_devfreq_add_device(&gpu->pdev->dev,
  98			&msm_devfreq_profile, DEVFREQ_GOV_SIMPLE_ONDEMAND,
  99			NULL);
 100
 101	if (IS_ERR(gpu->devfreq.devfreq)) {
 102		DRM_DEV_ERROR(&gpu->pdev->dev, "Couldn't initialize GPU devfreq\n");
 103		gpu->devfreq.devfreq = NULL;
 104	}
 105
 106	devfreq_suspend_device(gpu->devfreq.devfreq);
 107}
 108
 109static int enable_pwrrail(struct msm_gpu *gpu)
 110{
 111	struct drm_device *dev = gpu->dev;
 112	int ret = 0;
 113
 114	if (gpu->gpu_reg) {
 115		ret = regulator_enable(gpu->gpu_reg);
 116		if (ret) {
 117			DRM_DEV_ERROR(dev->dev, "failed to enable 'gpu_reg': %d\n", ret);
 118			return ret;
 119		}
 120	}
 121
 122	if (gpu->gpu_cx) {
 123		ret = regulator_enable(gpu->gpu_cx);
 124		if (ret) {
 125			DRM_DEV_ERROR(dev->dev, "failed to enable 'gpu_cx': %d\n", ret);
 126			return ret;
 127		}
 128	}
 129
 130	return 0;
 131}
 132
 133static int disable_pwrrail(struct msm_gpu *gpu)
 134{
 135	if (gpu->gpu_cx)
 136		regulator_disable(gpu->gpu_cx);
 137	if (gpu->gpu_reg)
 138		regulator_disable(gpu->gpu_reg);
 139	return 0;
 140}
 141
 142static int enable_clk(struct msm_gpu *gpu)
 143{
 144	if (gpu->core_clk && gpu->fast_rate)
 145		clk_set_rate(gpu->core_clk, gpu->fast_rate);
 146
 147	/* Set the RBBM timer rate to 19.2Mhz */
 148	if (gpu->rbbmtimer_clk)
 149		clk_set_rate(gpu->rbbmtimer_clk, 19200000);
 150
 151	return clk_bulk_prepare_enable(gpu->nr_clocks, gpu->grp_clks);
 152}
 153
 154static int disable_clk(struct msm_gpu *gpu)
 155{
 156	clk_bulk_disable_unprepare(gpu->nr_clocks, gpu->grp_clks);
 157
 158	/*
 159	 * Set the clock to a deliberately low rate. On older targets the clock
 160	 * speed had to be non zero to avoid problems. On newer targets this
 161	 * will be rounded down to zero anyway so it all works out.
 162	 */
 163	if (gpu->core_clk)
 164		clk_set_rate(gpu->core_clk, 27000000);
 165
 166	if (gpu->rbbmtimer_clk)
 167		clk_set_rate(gpu->rbbmtimer_clk, 0);
 168
 169	return 0;
 170}
 171
 172static int enable_axi(struct msm_gpu *gpu)
 173{
 174	if (gpu->ebi1_clk)
 175		clk_prepare_enable(gpu->ebi1_clk);
 176	return 0;
 177}
 178
 179static int disable_axi(struct msm_gpu *gpu)
 180{
 181	if (gpu->ebi1_clk)
 182		clk_disable_unprepare(gpu->ebi1_clk);
 183	return 0;
 184}
 185
 186void msm_gpu_resume_devfreq(struct msm_gpu *gpu)
 187{
 188	gpu->devfreq.busy_cycles = 0;
 189	gpu->devfreq.time = ktime_get();
 190
 191	devfreq_resume_device(gpu->devfreq.devfreq);
 192}
 193
 194int msm_gpu_pm_resume(struct msm_gpu *gpu)
 195{
 196	int ret;
 197
 198	DBG("%s", gpu->name);
 
 199
 200	ret = enable_pwrrail(gpu);
 201	if (ret)
 202		return ret;
 203
 204	ret = enable_clk(gpu);
 205	if (ret)
 206		return ret;
 207
 208	ret = enable_axi(gpu);
 209	if (ret)
 210		return ret;
 211
 212	msm_gpu_resume_devfreq(gpu);
 213
 214	gpu->needs_hw_init = true;
 215
 216	return 0;
 217}
 218
 219int msm_gpu_pm_suspend(struct msm_gpu *gpu)
 220{
 221	int ret;
 222
 223	DBG("%s", gpu->name);
 
 224
 225	devfreq_suspend_device(gpu->devfreq.devfreq);
 226
 227	ret = disable_axi(gpu);
 228	if (ret)
 229		return ret;
 230
 231	ret = disable_clk(gpu);
 232	if (ret)
 233		return ret;
 234
 235	ret = disable_pwrrail(gpu);
 236	if (ret)
 237		return ret;
 238
 
 
 239	return 0;
 240}
 241
 
 
 
 
 
 
 
 
 242int msm_gpu_hw_init(struct msm_gpu *gpu)
 243{
 244	int ret;
 245
 246	WARN_ON(!mutex_is_locked(&gpu->dev->struct_mutex));
 247
 248	if (!gpu->needs_hw_init)
 249		return 0;
 250
 251	disable_irq(gpu->irq);
 252	ret = gpu->funcs->hw_init(gpu);
 253	if (!ret)
 254		gpu->needs_hw_init = false;
 255	enable_irq(gpu->irq);
 256
 257	return ret;
 258}
 259
 260#ifdef CONFIG_DEV_COREDUMP
 261static ssize_t msm_gpu_devcoredump_read(char *buffer, loff_t offset,
 262		size_t count, void *data, size_t datalen)
 263{
 264	struct msm_gpu *gpu = data;
 265	struct drm_print_iterator iter;
 266	struct drm_printer p;
 267	struct msm_gpu_state *state;
 268
 269	state = msm_gpu_crashstate_get(gpu);
 270	if (!state)
 271		return 0;
 272
 273	iter.data = buffer;
 274	iter.offset = 0;
 275	iter.start = offset;
 276	iter.remain = count;
 277
 278	p = drm_coredump_printer(&iter);
 279
 280	drm_printf(&p, "---\n");
 281	drm_printf(&p, "kernel: " UTS_RELEASE "\n");
 282	drm_printf(&p, "module: " KBUILD_MODNAME "\n");
 283	drm_printf(&p, "time: %lld.%09ld\n",
 284		state->time.tv_sec, state->time.tv_nsec);
 285	if (state->comm)
 286		drm_printf(&p, "comm: %s\n", state->comm);
 287	if (state->cmd)
 288		drm_printf(&p, "cmdline: %s\n", state->cmd);
 289
 290	gpu->funcs->show(gpu, state, &p);
 291
 292	msm_gpu_crashstate_put(gpu);
 293
 294	return count - iter.remain;
 295}
 296
 297static void msm_gpu_devcoredump_free(void *data)
 298{
 299	struct msm_gpu *gpu = data;
 300
 301	msm_gpu_crashstate_put(gpu);
 302}
 303
 304static void msm_gpu_crashstate_get_bo(struct msm_gpu_state *state,
 305		struct msm_gem_object *obj, u64 iova, u32 flags)
 306{
 307	struct msm_gpu_state_bo *state_bo = &state->bos[state->nr_bos];
 
 308
 309	/* Don't record write only objects */
 310	state_bo->size = obj->base.size;
 
 311	state_bo->iova = iova;
 312
 313	/* Only store data for non imported buffer objects marked for read */
 314	if ((flags & MSM_SUBMIT_BO_READ) && !obj->base.import_attach) {
 
 
 
 315		void *ptr;
 316
 317		state_bo->data = kvmalloc(obj->base.size, GFP_KERNEL);
 318		if (!state_bo->data)
 319			goto out;
 320
 321		ptr = msm_gem_get_vaddr_active(&obj->base);
 
 
 322		if (IS_ERR(ptr)) {
 323			kvfree(state_bo->data);
 324			state_bo->data = NULL;
 325			goto out;
 326		}
 327
 328		memcpy(state_bo->data, ptr, obj->base.size);
 329		msm_gem_put_vaddr(&obj->base);
 330	}
 331out:
 332	state->nr_bos++;
 333}
 334
 335static void msm_gpu_crashstate_capture(struct msm_gpu *gpu,
 336		struct msm_gem_submit *submit, char *comm, char *cmd)
 337{
 338	struct msm_gpu_state *state;
 339
 340	/* Check if the target supports capturing crash state */
 341	if (!gpu->funcs->gpu_state_get)
 342		return;
 343
 344	/* Only save one crash state at a time */
 345	if (gpu->crashstate)
 346		return;
 347
 348	state = gpu->funcs->gpu_state_get(gpu);
 349	if (IS_ERR_OR_NULL(state))
 350		return;
 351
 352	/* Fill in the additional crash state information */
 353	state->comm = kstrdup(comm, GFP_KERNEL);
 354	state->cmd = kstrdup(cmd, GFP_KERNEL);
 
 355
 356	if (submit) {
 357		int i;
 358
 359		state->bos = kcalloc(submit->nr_cmds,
 360			sizeof(struct msm_gpu_state_bo), GFP_KERNEL);
 361
 362		for (i = 0; state->bos && i < submit->nr_cmds; i++) {
 363			int idx = submit->cmd[i].idx;
 364
 365			msm_gpu_crashstate_get_bo(state, submit->bos[idx].obj,
 366				submit->bos[idx].iova, submit->bos[idx].flags);
 367		}
 368	}
 369
 370	/* Set the active crash state to be dumped on failure */
 371	gpu->crashstate = state;
 372
 373	/* FIXME: Release the crashstate if this errors out? */
 374	dev_coredumpm(gpu->dev->dev, THIS_MODULE, gpu, 0, GFP_KERNEL,
 375		msm_gpu_devcoredump_read, msm_gpu_devcoredump_free);
 376}
 377#else
 378static void msm_gpu_crashstate_capture(struct msm_gpu *gpu,
 379		struct msm_gem_submit *submit, char *comm, char *cmd)
 380{
 381}
 382#endif
 383
 384/*
 385 * Hangcheck detection for locked gpu:
 386 */
 387
 388static void update_fences(struct msm_gpu *gpu, struct msm_ringbuffer *ring,
 389		uint32_t fence)
 390{
 391	struct msm_gem_submit *submit;
 
 392
 
 393	list_for_each_entry(submit, &ring->submits, node) {
 394		if (submit->seqno > fence)
 395			break;
 
 
 
 
 396
 397		msm_update_fence(submit->ring->fctx,
 398			submit->fence->seqno);
 399	}
 400}
 401
 402static struct msm_gem_submit *
 403find_submit(struct msm_ringbuffer *ring, uint32_t fence)
 
 404{
 405	struct msm_gem_submit *submit;
 
 
 
 
 
 
 
 
 
 
 
 406
 407	WARN_ON(!mutex_is_locked(&ring->gpu->dev->struct_mutex));
 
 408
 409	list_for_each_entry(submit, &ring->submits, node)
 410		if (submit->seqno == fence)
 411			return submit;
 412
 413	return NULL;
 414}
 415
 416static void retire_submits(struct msm_gpu *gpu);
 417
 418static void recover_worker(struct work_struct *work)
 419{
 420	struct msm_gpu *gpu = container_of(work, struct msm_gpu, recover_work);
 421	struct drm_device *dev = gpu->dev;
 422	struct msm_drm_private *priv = dev->dev_private;
 423	struct msm_gem_submit *submit;
 424	struct msm_ringbuffer *cur_ring = gpu->funcs->active_ring(gpu);
 425	char *comm = NULL, *cmd = NULL;
 426	int i;
 427
 428	mutex_lock(&dev->struct_mutex);
 429
 430	DRM_DEV_ERROR(dev->dev, "%s: hangcheck recover!\n", gpu->name);
 431
 432	submit = find_submit(cur_ring, cur_ring->memptrs->fence + 1);
 433	if (submit) {
 434		struct task_struct *task;
 435
 436		/* Increment the fault counts */
 437		gpu->global_faults++;
 438		submit->queue->faults++;
 439
 440		task = get_pid_task(submit->pid, PIDTYPE_PID);
 441		if (task) {
 442			comm = kstrdup(task->comm, GFP_KERNEL);
 443			cmd = kstrdup_quotable_cmdline(task, GFP_KERNEL);
 444			put_task_struct(task);
 445		}
 
 
 
 
 
 
 
 
 
 
 
 
 446
 447		if (comm && cmd) {
 448			DRM_DEV_ERROR(dev->dev, "%s: offending task: %s (%s)\n",
 449				gpu->name, comm, cmd);
 450
 451			msm_rd_dump_submit(priv->hangrd, submit,
 452				"offending task: %s (%s)", comm, cmd);
 453		} else
 454			msm_rd_dump_submit(priv->hangrd, submit, NULL);
 455	}
 456
 457	/* Record the crash state */
 458	pm_runtime_get_sync(&gpu->pdev->dev);
 459	msm_gpu_crashstate_capture(gpu, submit, comm, cmd);
 460	pm_runtime_put_sync(&gpu->pdev->dev);
 461
 462	kfree(cmd);
 463	kfree(comm);
 464
 465	/*
 466	 * Update all the rings with the latest and greatest fence.. this
 467	 * needs to happen after msm_rd_dump_submit() to ensure that the
 468	 * bo's referenced by the offending submit are still around.
 469	 */
 470	for (i = 0; i < gpu->nr_rings; i++) {
 471		struct msm_ringbuffer *ring = gpu->rb[i];
 472
 473		uint32_t fence = ring->memptrs->fence;
 474
 475		/*
 476		 * For the current (faulting?) ring/submit advance the fence by
 477		 * one more to clear the faulting submit
 478		 */
 479		if (ring == cur_ring)
 480			fence++;
 481
 482		update_fences(gpu, ring, fence);
 483	}
 484
 485	if (msm_gpu_active(gpu)) {
 486		/* retire completed submits, plus the one that hung: */
 487		retire_submits(gpu);
 488
 489		pm_runtime_get_sync(&gpu->pdev->dev);
 490		gpu->funcs->recover(gpu);
 491		pm_runtime_put_sync(&gpu->pdev->dev);
 492
 493		/*
 494		 * Replay all remaining submits starting with highest priority
 495		 * ring
 496		 */
 497		for (i = 0; i < gpu->nr_rings; i++) {
 498			struct msm_ringbuffer *ring = gpu->rb[i];
 
 499
 
 500			list_for_each_entry(submit, &ring->submits, node)
 501				gpu->funcs->submit(gpu, submit, NULL);
 
 502		}
 503	}
 504
 505	mutex_unlock(&dev->struct_mutex);
 
 
 
 506
 507	msm_gpu_retire(gpu);
 508}
 509
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 510static void hangcheck_timer_reset(struct msm_gpu *gpu)
 511{
 512	DBG("%s", gpu->name);
 513	mod_timer(&gpu->hangcheck_timer,
 514			round_jiffies_up(jiffies + DRM_MSM_HANGCHECK_JIFFIES));
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 515}
 516
 517static void hangcheck_handler(struct timer_list *t)
 518{
 519	struct msm_gpu *gpu = from_timer(gpu, t, hangcheck_timer);
 520	struct drm_device *dev = gpu->dev;
 521	struct msm_drm_private *priv = dev->dev_private;
 522	struct msm_ringbuffer *ring = gpu->funcs->active_ring(gpu);
 523	uint32_t fence = ring->memptrs->fence;
 524
 525	if (fence != ring->hangcheck_fence) {
 526		/* some progress has been made.. ya! */
 527		ring->hangcheck_fence = fence;
 528	} else if (fence < ring->seqno) {
 
 
 529		/* no progress and not done.. hung! */
 530		ring->hangcheck_fence = fence;
 
 531		DRM_DEV_ERROR(dev->dev, "%s: hangcheck detected gpu lockup rb %d!\n",
 532				gpu->name, ring->id);
 533		DRM_DEV_ERROR(dev->dev, "%s:     completed fence: %u\n",
 534				gpu->name, fence);
 535		DRM_DEV_ERROR(dev->dev, "%s:     submitted fence: %u\n",
 536				gpu->name, ring->seqno);
 537
 538		queue_work(priv->wq, &gpu->recover_work);
 539	}
 540
 541	/* if still more pending work, reset the hangcheck timer: */
 542	if (ring->seqno > ring->hangcheck_fence)
 543		hangcheck_timer_reset(gpu);
 544
 545	/* workaround for missing irq: */
 546	queue_work(priv->wq, &gpu->retire_work);
 547}
 548
 549/*
 550 * Performance Counters:
 551 */
 552
 553/* called under perf_lock */
 554static int update_hw_cntrs(struct msm_gpu *gpu, uint32_t ncntrs, uint32_t *cntrs)
 555{
 556	uint32_t current_cntrs[ARRAY_SIZE(gpu->last_cntrs)];
 557	int i, n = min(ncntrs, gpu->num_perfcntrs);
 558
 559	/* read current values: */
 560	for (i = 0; i < gpu->num_perfcntrs; i++)
 561		current_cntrs[i] = gpu_read(gpu, gpu->perfcntrs[i].sample_reg);
 562
 563	/* update cntrs: */
 564	for (i = 0; i < n; i++)
 565		cntrs[i] = current_cntrs[i] - gpu->last_cntrs[i];
 566
 567	/* save current values: */
 568	for (i = 0; i < gpu->num_perfcntrs; i++)
 569		gpu->last_cntrs[i] = current_cntrs[i];
 570
 571	return n;
 572}
 573
 574static void update_sw_cntrs(struct msm_gpu *gpu)
 575{
 576	ktime_t time;
 577	uint32_t elapsed;
 578	unsigned long flags;
 579
 580	spin_lock_irqsave(&gpu->perf_lock, flags);
 581	if (!gpu->perfcntr_active)
 582		goto out;
 583
 584	time = ktime_get();
 585	elapsed = ktime_to_us(ktime_sub(time, gpu->last_sample.time));
 586
 587	gpu->totaltime += elapsed;
 588	if (gpu->last_sample.active)
 589		gpu->activetime += elapsed;
 590
 591	gpu->last_sample.active = msm_gpu_active(gpu);
 592	gpu->last_sample.time = time;
 593
 594out:
 595	spin_unlock_irqrestore(&gpu->perf_lock, flags);
 596}
 597
 598void msm_gpu_perfcntr_start(struct msm_gpu *gpu)
 599{
 600	unsigned long flags;
 601
 602	pm_runtime_get_sync(&gpu->pdev->dev);
 603
 604	spin_lock_irqsave(&gpu->perf_lock, flags);
 605	/* we could dynamically enable/disable perfcntr registers too.. */
 606	gpu->last_sample.active = msm_gpu_active(gpu);
 607	gpu->last_sample.time = ktime_get();
 608	gpu->activetime = gpu->totaltime = 0;
 609	gpu->perfcntr_active = true;
 610	update_hw_cntrs(gpu, 0, NULL);
 611	spin_unlock_irqrestore(&gpu->perf_lock, flags);
 612}
 613
 614void msm_gpu_perfcntr_stop(struct msm_gpu *gpu)
 615{
 616	gpu->perfcntr_active = false;
 617	pm_runtime_put_sync(&gpu->pdev->dev);
 618}
 619
 620/* returns -errno or # of cntrs sampled */
 621int msm_gpu_perfcntr_sample(struct msm_gpu *gpu, uint32_t *activetime,
 622		uint32_t *totaltime, uint32_t ncntrs, uint32_t *cntrs)
 623{
 624	unsigned long flags;
 625	int ret;
 626
 627	spin_lock_irqsave(&gpu->perf_lock, flags);
 628
 629	if (!gpu->perfcntr_active) {
 630		ret = -EINVAL;
 631		goto out;
 632	}
 633
 634	*activetime = gpu->activetime;
 635	*totaltime = gpu->totaltime;
 636
 637	gpu->activetime = gpu->totaltime = 0;
 638
 639	ret = update_hw_cntrs(gpu, ncntrs, cntrs);
 640
 641out:
 642	spin_unlock_irqrestore(&gpu->perf_lock, flags);
 643
 644	return ret;
 645}
 646
 647/*
 648 * Cmdstream submission/retirement:
 649 */
 650
 651static void retire_submit(struct msm_gpu *gpu, struct msm_ringbuffer *ring,
 652		struct msm_gem_submit *submit)
 653{
 654	int index = submit->seqno % MSM_GPU_SUBMIT_STATS_COUNT;
 655	volatile struct msm_gpu_submit_stats *stats;
 656	u64 elapsed, clock = 0;
 657	int i;
 658
 659	stats = &ring->memptrs->stats[index];
 660	/* Convert 19.2Mhz alwayson ticks to nanoseconds for elapsed time */
 661	elapsed = (stats->alwayson_end - stats->alwayson_start) * 10000;
 662	do_div(elapsed, 192);
 663
 
 
 664	/* Calculate the clock frequency from the number of CP cycles */
 665	if (elapsed) {
 666		clock = (stats->cpcycles_end - stats->cpcycles_start) * 1000;
 667		do_div(clock, elapsed);
 668	}
 669
 
 
 
 670	trace_msm_gpu_submit_retired(submit, elapsed, clock,
 671		stats->alwayson_start, stats->alwayson_end);
 672
 673	for (i = 0; i < submit->nr_bos; i++) {
 674		struct msm_gem_object *msm_obj = submit->bos[i].obj;
 675		/* move to inactive: */
 676		msm_gem_move_to_inactive(&msm_obj->base);
 677		msm_gem_unpin_iova(&msm_obj->base, submit->aspace);
 678		drm_gem_object_put(&msm_obj->base);
 
 
 
 
 
 
 
 
 
 679	}
 680
 681	pm_runtime_mark_last_busy(&gpu->pdev->dev);
 682	pm_runtime_put_autosuspend(&gpu->pdev->dev);
 683	msm_gem_submit_free(submit);
 684}
 685
 686static void retire_submits(struct msm_gpu *gpu)
 687{
 688	struct drm_device *dev = gpu->dev;
 689	struct msm_gem_submit *submit, *tmp;
 690	int i;
 691
 692	WARN_ON(!mutex_is_locked(&dev->struct_mutex));
 693
 694	/* Retire the commits starting with highest priority */
 695	for (i = 0; i < gpu->nr_rings; i++) {
 696		struct msm_ringbuffer *ring = gpu->rb[i];
 697
 698		list_for_each_entry_safe(submit, tmp, &ring->submits, node) {
 699			if (dma_fence_is_signaled(submit->fence))
 
 
 
 
 
 
 
 
 
 
 
 
 
 700				retire_submit(gpu, ring, submit);
 
 
 
 701		}
 702	}
 
 
 703}
 704
 705static void retire_worker(struct work_struct *work)
 706{
 707	struct msm_gpu *gpu = container_of(work, struct msm_gpu, retire_work);
 708	struct drm_device *dev = gpu->dev;
 709	int i;
 710
 711	for (i = 0; i < gpu->nr_rings; i++)
 712		update_fences(gpu, gpu->rb[i], gpu->rb[i]->memptrs->fence);
 713
 714	mutex_lock(&dev->struct_mutex);
 715	retire_submits(gpu);
 716	mutex_unlock(&dev->struct_mutex);
 717}
 718
 719/* call from irq handler to schedule work to retire bo's */
 720void msm_gpu_retire(struct msm_gpu *gpu)
 721{
 722	struct msm_drm_private *priv = gpu->dev->dev_private;
 723	queue_work(priv->wq, &gpu->retire_work);
 
 
 
 
 724	update_sw_cntrs(gpu);
 725}
 726
 727/* add bo's to gpu's ring, and kick gpu: */
 728void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
 729		struct msm_file_private *ctx)
 730{
 731	struct drm_device *dev = gpu->dev;
 732	struct msm_drm_private *priv = dev->dev_private;
 733	struct msm_ringbuffer *ring = submit->ring;
 734	int i;
 735
 736	WARN_ON(!mutex_is_locked(&dev->struct_mutex));
 737
 738	pm_runtime_get_sync(&gpu->pdev->dev);
 739
 740	msm_gpu_hw_init(gpu);
 741
 742	submit->seqno = ++ring->seqno;
 743
 744	list_add_tail(&submit->node, &ring->submits);
 745
 746	msm_rd_dump_submit(priv->rd, submit, NULL);
 747
 748	update_sw_cntrs(gpu);
 749
 750	for (i = 0; i < submit->nr_bos; i++) {
 751		struct msm_gem_object *msm_obj = submit->bos[i].obj;
 752		uint64_t iova;
 
 
 753
 754		/* can't happen yet.. but when we add 2d support we'll have
 755		 * to deal w/ cross-ring synchronization:
 756		 */
 757		WARN_ON(is_active(msm_obj) && (msm_obj->gpu != gpu));
 758
 759		/* submit takes a reference to the bo and iova until retired: */
 760		drm_gem_object_get(&msm_obj->base);
 761		msm_gem_get_and_pin_iova(&msm_obj->base, submit->aspace, &iova);
 762
 763		if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE)
 764			msm_gem_move_to_active(&msm_obj->base, gpu, true, submit->fence);
 765		else if (submit->bos[i].flags & MSM_SUBMIT_BO_READ)
 766			msm_gem_move_to_active(&msm_obj->base, gpu, false, submit->fence);
 
 767	}
 
 
 768
 769	gpu->funcs->submit(gpu, submit, ctx);
 770	priv->lastctx = ctx;
 771
 
 772	hangcheck_timer_reset(gpu);
 773}
 774
 775/*
 776 * Init/Cleanup:
 777 */
 778
 779static irqreturn_t irq_handler(int irq, void *data)
 780{
 781	struct msm_gpu *gpu = data;
 782	return gpu->funcs->irq(gpu);
 783}
 784
 785static int get_clocks(struct platform_device *pdev, struct msm_gpu *gpu)
 786{
 787	int ret = devm_clk_bulk_get_all(&pdev->dev, &gpu->grp_clks);
 788
 789	if (ret < 1) {
 790		gpu->nr_clocks = 0;
 791		return ret;
 792	}
 793
 794	gpu->nr_clocks = ret;
 795
 796	gpu->core_clk = msm_clk_bulk_get_clock(gpu->grp_clks,
 797		gpu->nr_clocks, "core");
 798
 799	gpu->rbbmtimer_clk = msm_clk_bulk_get_clock(gpu->grp_clks,
 800		gpu->nr_clocks, "rbbmtimer");
 801
 802	return 0;
 803}
 804
 805static struct msm_gem_address_space *
 806msm_gpu_create_address_space(struct msm_gpu *gpu, struct platform_device *pdev,
 807		uint64_t va_start, uint64_t va_end)
 808{
 809	struct msm_gem_address_space *aspace;
 810	int ret;
 
 811
 812	/*
 813	 * Setup IOMMU.. eventually we will (I think) do this once per context
 814	 * and have separate page tables per context.  For now, to keep things
 815	 * simple and to get something working, just use a single address space:
 816	 */
 817	if (!adreno_is_a2xx(to_adreno_gpu(gpu))) {
 818		struct iommu_domain *iommu = iommu_domain_alloc(&platform_bus_type);
 819		if (!iommu)
 820			return NULL;
 821
 822		iommu->geometry.aperture_start = va_start;
 823		iommu->geometry.aperture_end = va_end;
 824
 825		DRM_DEV_INFO(gpu->dev->dev, "%s: using IOMMU\n", gpu->name);
 826
 827		aspace = msm_gem_address_space_create(&pdev->dev, iommu, "gpu");
 828		if (IS_ERR(aspace))
 829			iommu_domain_free(iommu);
 830	} else {
 831		aspace = msm_gem_address_space_create_a2xx(&pdev->dev, gpu, "gpu",
 832			va_start, va_end);
 833	}
 834
 835	if (IS_ERR(aspace)) {
 836		DRM_DEV_ERROR(gpu->dev->dev, "failed to init mmu: %ld\n",
 837			PTR_ERR(aspace));
 838		return ERR_CAST(aspace);
 839	}
 840
 841	ret = aspace->mmu->funcs->attach(aspace->mmu, NULL, 0);
 842	if (ret) {
 843		msm_gem_address_space_put(aspace);
 844		return ERR_PTR(ret);
 845	}
 846
 847	return aspace;
 848}
 849
 850int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 851		struct msm_gpu *gpu, const struct msm_gpu_funcs *funcs,
 852		const char *name, struct msm_gpu_config *config)
 853{
 
 854	int i, ret, nr_rings = config->nr_rings;
 855	void *memptrs;
 856	uint64_t memptrs_iova;
 857
 858	if (WARN_ON(gpu->num_perfcntrs > ARRAY_SIZE(gpu->last_cntrs)))
 859		gpu->num_perfcntrs = ARRAY_SIZE(gpu->last_cntrs);
 860
 861	gpu->dev = drm;
 862	gpu->funcs = funcs;
 863	gpu->name = name;
 864
 865	INIT_LIST_HEAD(&gpu->active_list);
 866	INIT_WORK(&gpu->retire_work, retire_worker);
 867	INIT_WORK(&gpu->recover_work, recover_worker);
 
 
 
 
 
 
 
 
 
 
 
 
 868
 
 
 
 
 
 
 
 
 
 869
 870	timer_setup(&gpu->hangcheck_timer, hangcheck_handler, 0);
 871
 872	spin_lock_init(&gpu->perf_lock);
 873
 874
 875	/* Map registers: */
 876	gpu->mmio = msm_ioremap(pdev, config->ioname, name);
 877	if (IS_ERR(gpu->mmio)) {
 878		ret = PTR_ERR(gpu->mmio);
 879		goto fail;
 880	}
 881
 882	/* Get Interrupt: */
 883	gpu->irq = platform_get_irq(pdev, 0);
 884	if (gpu->irq < 0) {
 885		ret = gpu->irq;
 886		DRM_DEV_ERROR(drm->dev, "failed to get irq: %d\n", ret);
 887		goto fail;
 888	}
 889
 890	ret = devm_request_irq(&pdev->dev, gpu->irq, irq_handler,
 891			IRQF_TRIGGER_HIGH, gpu->name, gpu);
 892	if (ret) {
 893		DRM_DEV_ERROR(drm->dev, "failed to request IRQ%u: %d\n", gpu->irq, ret);
 894		goto fail;
 895	}
 896
 897	ret = get_clocks(pdev, gpu);
 898	if (ret)
 899		goto fail;
 900
 901	gpu->ebi1_clk = msm_clk_get(pdev, "bus");
 902	DBG("ebi1_clk: %p", gpu->ebi1_clk);
 903	if (IS_ERR(gpu->ebi1_clk))
 904		gpu->ebi1_clk = NULL;
 905
 906	/* Acquire regulators: */
 907	gpu->gpu_reg = devm_regulator_get(&pdev->dev, "vdd");
 908	DBG("gpu_reg: %p", gpu->gpu_reg);
 909	if (IS_ERR(gpu->gpu_reg))
 910		gpu->gpu_reg = NULL;
 911
 912	gpu->gpu_cx = devm_regulator_get(&pdev->dev, "vddcx");
 913	DBG("gpu_cx: %p", gpu->gpu_cx);
 914	if (IS_ERR(gpu->gpu_cx))
 915		gpu->gpu_cx = NULL;
 916
 917	gpu->pdev = pdev;
 918	platform_set_drvdata(pdev, gpu);
 919
 920	msm_devfreq_init(gpu);
 921
 922	gpu->aspace = msm_gpu_create_address_space(gpu, pdev,
 923		config->va_start, config->va_end);
 924
 925	if (gpu->aspace == NULL)
 926		DRM_DEV_INFO(drm->dev, "%s: no IOMMU, fallback to VRAM carveout!\n", name);
 927	else if (IS_ERR(gpu->aspace)) {
 928		ret = PTR_ERR(gpu->aspace);
 929		goto fail;
 930	}
 931
 932	memptrs = msm_gem_kernel_new(drm,
 933		sizeof(struct msm_rbmemptrs) * nr_rings,
 934		MSM_BO_UNCACHED, gpu->aspace, &gpu->memptrs_bo,
 935		&memptrs_iova);
 936
 937	if (IS_ERR(memptrs)) {
 938		ret = PTR_ERR(memptrs);
 939		DRM_DEV_ERROR(drm->dev, "could not allocate memptrs: %d\n", ret);
 940		goto fail;
 941	}
 942
 943	msm_gem_object_set_name(gpu->memptrs_bo, "memptrs");
 944
 945	if (nr_rings > ARRAY_SIZE(gpu->rb)) {
 946		DRM_DEV_INFO_ONCE(drm->dev, "Only creating %zu ringbuffers\n",
 947			ARRAY_SIZE(gpu->rb));
 948		nr_rings = ARRAY_SIZE(gpu->rb);
 949	}
 950
 951	/* Create ringbuffer(s): */
 952	for (i = 0; i < nr_rings; i++) {
 953		gpu->rb[i] = msm_ringbuffer_new(gpu, i, memptrs, memptrs_iova);
 954
 955		if (IS_ERR(gpu->rb[i])) {
 956			ret = PTR_ERR(gpu->rb[i]);
 957			DRM_DEV_ERROR(drm->dev,
 958				"could not create ringbuffer %d: %d\n", i, ret);
 959			goto fail;
 960		}
 961
 962		memptrs += sizeof(struct msm_rbmemptrs);
 963		memptrs_iova += sizeof(struct msm_rbmemptrs);
 964	}
 965
 966	gpu->nr_rings = nr_rings;
 967
 
 
 968	return 0;
 969
 970fail:
 971	for (i = 0; i < ARRAY_SIZE(gpu->rb); i++)  {
 972		msm_ringbuffer_destroy(gpu->rb[i]);
 973		gpu->rb[i] = NULL;
 974	}
 975
 976	msm_gem_kernel_put(gpu->memptrs_bo, gpu->aspace, false);
 977
 978	platform_set_drvdata(pdev, NULL);
 979	return ret;
 980}
 981
 982void msm_gpu_cleanup(struct msm_gpu *gpu)
 983{
 984	int i;
 985
 986	DBG("%s", gpu->name);
 987
 988	WARN_ON(!list_empty(&gpu->active_list));
 989
 990	for (i = 0; i < ARRAY_SIZE(gpu->rb); i++) {
 991		msm_ringbuffer_destroy(gpu->rb[i]);
 992		gpu->rb[i] = NULL;
 993	}
 994
 995	msm_gem_kernel_put(gpu->memptrs_bo, gpu->aspace, false);
 996
 997	if (!IS_ERR_OR_NULL(gpu->aspace)) {
 998		gpu->aspace->mmu->funcs->detach(gpu->aspace->mmu,
 999			NULL, 0);
1000		msm_gem_address_space_put(gpu->aspace);
1001	}
 
 
 
 
 
 
 
 
1002}