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v4.6
 
  1/*
  2 * Copyright (C) 2013 Red Hat
  3 * Author: Rob Clark <robdclark@gmail.com>
  4 *
  5 * This program is free software; you can redistribute it and/or modify it
  6 * under the terms of the GNU General Public License version 2 as published by
  7 * the Free Software Foundation.
  8 *
  9 * This program is distributed in the hope that it will be useful, but WITHOUT
 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 12 * more details.
 13 *
 14 * You should have received a copy of the GNU General Public License along with
 15 * this program.  If not, see <http://www.gnu.org/licenses/>.
 16 */
 17
 
 
 18#include "msm_gpu.h"
 19#include "msm_gem.h"
 20#include "msm_mmu.h"
 21
 
 
 
 
 
 
 
 22
 23/*
 24 * Power Management:
 25 */
 26
 27#ifdef DOWNSTREAM_CONFIG_MSM_BUS_SCALING
 28#include <mach/board.h>
 29static void bs_init(struct msm_gpu *gpu)
 30{
 31	if (gpu->bus_scale_table) {
 32		gpu->bsc = msm_bus_scale_register_client(gpu->bus_scale_table);
 33		DBG("bus scale client: %08x", gpu->bsc);
 34	}
 35}
 36
 37static void bs_fini(struct msm_gpu *gpu)
 38{
 39	if (gpu->bsc) {
 40		msm_bus_scale_unregister_client(gpu->bsc);
 41		gpu->bsc = 0;
 42	}
 43}
 44
 45static void bs_set(struct msm_gpu *gpu, int idx)
 46{
 47	if (gpu->bsc) {
 48		DBG("set bus scaling: %d", idx);
 49		msm_bus_scale_client_update_request(gpu->bsc, idx);
 50	}
 51}
 52#else
 53static void bs_init(struct msm_gpu *gpu) {}
 54static void bs_fini(struct msm_gpu *gpu) {}
 55static void bs_set(struct msm_gpu *gpu, int idx) {}
 56#endif
 57
 58static int enable_pwrrail(struct msm_gpu *gpu)
 59{
 60	struct drm_device *dev = gpu->dev;
 61	int ret = 0;
 62
 63	if (gpu->gpu_reg) {
 64		ret = regulator_enable(gpu->gpu_reg);
 65		if (ret) {
 66			dev_err(dev->dev, "failed to enable 'gpu_reg': %d\n", ret);
 67			return ret;
 68		}
 69	}
 70
 71	if (gpu->gpu_cx) {
 72		ret = regulator_enable(gpu->gpu_cx);
 73		if (ret) {
 74			dev_err(dev->dev, "failed to enable 'gpu_cx': %d\n", ret);
 75			return ret;
 76		}
 77	}
 78
 79	return 0;
 80}
 81
 82static int disable_pwrrail(struct msm_gpu *gpu)
 83{
 84	if (gpu->gpu_cx)
 85		regulator_disable(gpu->gpu_cx);
 86	if (gpu->gpu_reg)
 87		regulator_disable(gpu->gpu_reg);
 88	return 0;
 89}
 90
 91static int enable_clk(struct msm_gpu *gpu)
 92{
 93	struct clk *rate_clk = NULL;
 94	int i;
 95
 96	/* NOTE: kgsl_pwrctrl_clk() ignores grp_clks[0].. */
 97	for (i = ARRAY_SIZE(gpu->grp_clks) - 1; i > 0; i--) {
 98		if (gpu->grp_clks[i]) {
 99			clk_prepare(gpu->grp_clks[i]);
100			rate_clk = gpu->grp_clks[i];
101		}
102	}
103
104	if (rate_clk && gpu->fast_rate)
105		clk_set_rate(rate_clk, gpu->fast_rate);
 
106
107	for (i = ARRAY_SIZE(gpu->grp_clks) - 1; i > 0; i--)
108		if (gpu->grp_clks[i])
109			clk_enable(gpu->grp_clks[i]);
110
111	return 0;
112}
113
114static int disable_clk(struct msm_gpu *gpu)
115{
116	struct clk *rate_clk = NULL;
117	int i;
118
119	/* NOTE: kgsl_pwrctrl_clk() ignores grp_clks[0].. */
120	for (i = ARRAY_SIZE(gpu->grp_clks) - 1; i > 0; i--) {
121		if (gpu->grp_clks[i]) {
122			clk_disable(gpu->grp_clks[i]);
123			rate_clk = gpu->grp_clks[i];
124		}
125	}
126
127	if (rate_clk && gpu->slow_rate)
128		clk_set_rate(rate_clk, gpu->slow_rate);
129
130	for (i = ARRAY_SIZE(gpu->grp_clks) - 1; i > 0; i--)
131		if (gpu->grp_clks[i])
132			clk_unprepare(gpu->grp_clks[i]);
133
134	return 0;
135}
136
137static int enable_axi(struct msm_gpu *gpu)
138{
139	if (gpu->ebi1_clk)
140		clk_prepare_enable(gpu->ebi1_clk);
141	if (gpu->bus_freq)
142		bs_set(gpu, gpu->bus_freq);
143	return 0;
144}
145
146static int disable_axi(struct msm_gpu *gpu)
147{
148	if (gpu->ebi1_clk)
149		clk_disable_unprepare(gpu->ebi1_clk);
150	if (gpu->bus_freq)
151		bs_set(gpu, 0);
152	return 0;
153}
154
155int msm_gpu_pm_resume(struct msm_gpu *gpu)
156{
157	struct drm_device *dev = gpu->dev;
158	int ret;
159
160	DBG("%s: active_cnt=%d", gpu->name, gpu->active_cnt);
161
162	WARN_ON(!mutex_is_locked(&dev->struct_mutex));
163
164	if (gpu->active_cnt++ > 0)
165		return 0;
166
167	if (WARN_ON(gpu->active_cnt <= 0))
168		return -EINVAL;
169
170	ret = enable_pwrrail(gpu);
171	if (ret)
172		return ret;
173
174	ret = enable_clk(gpu);
175	if (ret)
176		return ret;
177
178	ret = enable_axi(gpu);
179	if (ret)
180		return ret;
181
 
 
 
 
182	return 0;
183}
184
185int msm_gpu_pm_suspend(struct msm_gpu *gpu)
186{
187	struct drm_device *dev = gpu->dev;
188	int ret;
189
190	DBG("%s: active_cnt=%d", gpu->name, gpu->active_cnt);
191
192	WARN_ON(!mutex_is_locked(&dev->struct_mutex));
193
194	if (--gpu->active_cnt > 0)
195		return 0;
196
197	if (WARN_ON(gpu->active_cnt < 0))
198		return -EINVAL;
199
200	ret = disable_axi(gpu);
201	if (ret)
202		return ret;
203
204	ret = disable_clk(gpu);
205	if (ret)
206		return ret;
207
208	ret = disable_pwrrail(gpu);
209	if (ret)
210		return ret;
211
 
 
212	return 0;
213}
214
215/*
216 * Inactivity detection (for suspend):
217 */
 
 
 
 
218
219static void inactive_worker(struct work_struct *work)
220{
221	struct msm_gpu *gpu = container_of(work, struct msm_gpu, inactive_work);
222	struct drm_device *dev = gpu->dev;
223
224	if (gpu->inactive)
225		return;
226
227	DBG("%s: inactive!\n", gpu->name);
228	mutex_lock(&dev->struct_mutex);
229	if (!(msm_gpu_active(gpu) || gpu->inactive)) {
230		disable_axi(gpu);
231		disable_clk(gpu);
232		gpu->inactive = true;
233	}
234	mutex_unlock(&dev->struct_mutex);
 
 
235}
236
237static void inactive_handler(unsigned long data)
 
 
238{
239	struct msm_gpu *gpu = (struct msm_gpu *)data;
240	struct msm_drm_private *priv = gpu->dev->dev_private;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
241
242	queue_work(priv->wq, &gpu->inactive_work);
 
 
243}
244
245/* cancel inactive timer and make sure we are awake: */
246static void inactive_cancel(struct msm_gpu *gpu)
247{
248	DBG("%s", gpu->name);
249	del_timer(&gpu->inactive_timer);
250	if (gpu->inactive) {
251		enable_clk(gpu);
252		enable_axi(gpu);
253		gpu->inactive = false;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
254	}
 
 
255}
256
257static void inactive_start(struct msm_gpu *gpu)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
258{
259	DBG("%s", gpu->name);
260	mod_timer(&gpu->inactive_timer,
261			round_jiffies_up(jiffies + DRM_MSM_INACTIVE_JIFFIES));
262}
 
263
264/*
265 * Hangcheck detection for locked gpu:
266 */
267
268static void retire_submits(struct msm_gpu *gpu, uint32_t fence);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
269
270static void recover_worker(struct work_struct *work)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
271{
272	struct msm_gpu *gpu = container_of(work, struct msm_gpu, recover_work);
273	struct drm_device *dev = gpu->dev;
 
 
 
 
 
274
275	dev_err(dev->dev, "%s: hangcheck recover!\n", gpu->name);
276
277	mutex_lock(&dev->struct_mutex);
278	if (msm_gpu_active(gpu)) {
279		struct msm_gem_submit *submit;
280		uint32_t fence = gpu->funcs->last_fence(gpu);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
281
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
282		/* retire completed submits, plus the one that hung: */
283		retire_submits(gpu, fence + 1);
284
285		inactive_cancel(gpu);
286		gpu->funcs->recover(gpu);
287
288		/* replay the remaining submits after the one that hung: */
289		list_for_each_entry(submit, &gpu->submit_list, node) {
290			gpu->funcs->submit(gpu, submit, NULL);
 
 
 
 
 
 
 
 
 
291		}
292	}
293	mutex_unlock(&dev->struct_mutex);
 
 
 
 
294
295	msm_gpu_retire(gpu);
296}
297
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
298static void hangcheck_timer_reset(struct msm_gpu *gpu)
299{
300	DBG("%s", gpu->name);
301	mod_timer(&gpu->hangcheck_timer,
302			round_jiffies_up(jiffies + DRM_MSM_HANGCHECK_JIFFIES));
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
303}
304
305static void hangcheck_handler(unsigned long data)
306{
307	struct msm_gpu *gpu = (struct msm_gpu *)data;
308	struct drm_device *dev = gpu->dev;
309	struct msm_drm_private *priv = dev->dev_private;
310	uint32_t fence = gpu->funcs->last_fence(gpu);
311
312	if (fence != gpu->hangcheck_fence) {
313		/* some progress has been made.. ya! */
314		gpu->hangcheck_fence = fence;
315	} else if (fence < gpu->submitted_fence) {
 
 
316		/* no progress and not done.. hung! */
317		gpu->hangcheck_fence = fence;
318		dev_err(dev->dev, "%s: hangcheck detected gpu lockup!\n",
319				gpu->name);
320		dev_err(dev->dev, "%s:     completed fence: %u\n",
 
321				gpu->name, fence);
322		dev_err(dev->dev, "%s:     submitted fence: %u\n",
323				gpu->name, gpu->submitted_fence);
324		queue_work(priv->wq, &gpu->recover_work);
 
325	}
326
327	/* if still more pending work, reset the hangcheck timer: */
328	if (gpu->submitted_fence > gpu->hangcheck_fence)
329		hangcheck_timer_reset(gpu);
330
331	/* workaround for missing irq: */
332	queue_work(priv->wq, &gpu->retire_work);
333}
334
335/*
336 * Performance Counters:
337 */
338
339/* called under perf_lock */
340static int update_hw_cntrs(struct msm_gpu *gpu, uint32_t ncntrs, uint32_t *cntrs)
341{
342	uint32_t current_cntrs[ARRAY_SIZE(gpu->last_cntrs)];
343	int i, n = min(ncntrs, gpu->num_perfcntrs);
344
345	/* read current values: */
346	for (i = 0; i < gpu->num_perfcntrs; i++)
347		current_cntrs[i] = gpu_read(gpu, gpu->perfcntrs[i].sample_reg);
348
349	/* update cntrs: */
350	for (i = 0; i < n; i++)
351		cntrs[i] = current_cntrs[i] - gpu->last_cntrs[i];
352
353	/* save current values: */
354	for (i = 0; i < gpu->num_perfcntrs; i++)
355		gpu->last_cntrs[i] = current_cntrs[i];
356
357	return n;
358}
359
360static void update_sw_cntrs(struct msm_gpu *gpu)
361{
362	ktime_t time;
363	uint32_t elapsed;
364	unsigned long flags;
365
366	spin_lock_irqsave(&gpu->perf_lock, flags);
367	if (!gpu->perfcntr_active)
368		goto out;
369
370	time = ktime_get();
371	elapsed = ktime_to_us(ktime_sub(time, gpu->last_sample.time));
372
373	gpu->totaltime += elapsed;
374	if (gpu->last_sample.active)
375		gpu->activetime += elapsed;
376
377	gpu->last_sample.active = msm_gpu_active(gpu);
378	gpu->last_sample.time = time;
379
380out:
381	spin_unlock_irqrestore(&gpu->perf_lock, flags);
382}
383
384void msm_gpu_perfcntr_start(struct msm_gpu *gpu)
385{
386	unsigned long flags;
387
 
 
388	spin_lock_irqsave(&gpu->perf_lock, flags);
389	/* we could dynamically enable/disable perfcntr registers too.. */
390	gpu->last_sample.active = msm_gpu_active(gpu);
391	gpu->last_sample.time = ktime_get();
392	gpu->activetime = gpu->totaltime = 0;
393	gpu->perfcntr_active = true;
394	update_hw_cntrs(gpu, 0, NULL);
395	spin_unlock_irqrestore(&gpu->perf_lock, flags);
396}
397
398void msm_gpu_perfcntr_stop(struct msm_gpu *gpu)
399{
400	gpu->perfcntr_active = false;
 
401}
402
403/* returns -errno or # of cntrs sampled */
404int msm_gpu_perfcntr_sample(struct msm_gpu *gpu, uint32_t *activetime,
405		uint32_t *totaltime, uint32_t ncntrs, uint32_t *cntrs)
406{
407	unsigned long flags;
408	int ret;
409
410	spin_lock_irqsave(&gpu->perf_lock, flags);
411
412	if (!gpu->perfcntr_active) {
413		ret = -EINVAL;
414		goto out;
415	}
416
417	*activetime = gpu->activetime;
418	*totaltime = gpu->totaltime;
419
420	gpu->activetime = gpu->totaltime = 0;
421
422	ret = update_hw_cntrs(gpu, ncntrs, cntrs);
423
424out:
425	spin_unlock_irqrestore(&gpu->perf_lock, flags);
426
427	return ret;
428}
429
430/*
431 * Cmdstream submission/retirement:
432 */
433
434static void retire_submits(struct msm_gpu *gpu, uint32_t fence)
 
435{
436	struct drm_device *dev = gpu->dev;
437
438	WARN_ON(!mutex_is_locked(&dev->struct_mutex));
 
439
440	while (!list_empty(&gpu->submit_list)) {
441		struct msm_gem_submit *submit;
 
 
442
443		submit = list_first_entry(&gpu->submit_list,
444				struct msm_gem_submit, node);
445
446		if (submit->fence <= fence) {
447			list_del(&submit->node);
448			kfree(submit);
449		} else {
450			break;
451		}
452	}
453}
454
455static void retire_worker(struct work_struct *work)
456{
457	struct msm_gpu *gpu = container_of(work, struct msm_gpu, retire_work);
458	struct drm_device *dev = gpu->dev;
459	uint32_t fence = gpu->funcs->last_fence(gpu);
460
461	msm_update_fence(gpu->dev, fence);
 
462
463	mutex_lock(&dev->struct_mutex);
464
465	retire_submits(gpu, fence);
466
467	while (!list_empty(&gpu->active_list)) {
468		struct msm_gem_object *obj;
 
 
 
 
 
 
 
 
 
 
469
470		obj = list_first_entry(&gpu->active_list,
471				struct msm_gem_object, mm_list);
472
473		if ((obj->read_fence <= fence) &&
474				(obj->write_fence <= fence)) {
475			/* move to inactive: */
476			msm_gem_move_to_inactive(&obj->base);
477			msm_gem_put_iova(&obj->base, gpu->id);
478			drm_gem_object_unreference(&obj->base);
479		} else {
480			break;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
481		}
482	}
483
484	mutex_unlock(&dev->struct_mutex);
 
485
486	if (!msm_gpu_active(gpu))
487		inactive_start(gpu);
 
 
 
488}
489
490/* call from irq handler to schedule work to retire bo's */
491void msm_gpu_retire(struct msm_gpu *gpu)
492{
493	struct msm_drm_private *priv = gpu->dev->dev_private;
494	queue_work(priv->wq, &gpu->retire_work);
 
 
 
 
495	update_sw_cntrs(gpu);
496}
497
498/* add bo's to gpu's ring, and kick gpu: */
499int msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
500		struct msm_file_private *ctx)
501{
502	struct drm_device *dev = gpu->dev;
503	struct msm_drm_private *priv = dev->dev_private;
504	int i, ret;
505
506	WARN_ON(!mutex_is_locked(&dev->struct_mutex));
507
508	submit->fence = ++priv->next_fence;
509
510	gpu->submitted_fence = submit->fence;
511
512	inactive_cancel(gpu);
513
514	list_add_tail(&submit->node, &gpu->submit_list);
515
516	msm_rd_dump_submit(submit);
517
518	gpu->submitted_fence = submit->fence;
519
520	update_sw_cntrs(gpu);
521
522	for (i = 0; i < submit->nr_bos; i++) {
523		struct msm_gem_object *msm_obj = submit->bos[i].obj;
524
525		/* can't happen yet.. but when we add 2d support we'll have
526		 * to deal w/ cross-ring synchronization:
527		 */
528		WARN_ON(is_active(msm_obj) && (msm_obj->gpu != gpu));
529
530		if (!is_active(msm_obj)) {
531			uint32_t iova;
532
533			/* ring takes a reference to the bo and iova: */
534			drm_gem_object_reference(&msm_obj->base);
535			msm_gem_get_iova_locked(&msm_obj->base,
536					submit->gpu->id, &iova);
537		}
538
539		if (submit->bos[i].flags & MSM_SUBMIT_BO_READ)
540			msm_gem_move_to_active(&msm_obj->base, gpu, false, submit->fence);
 
541
542		if (submit->bos[i].flags & MSM_SUBMIT_BO_WRITE)
543			msm_gem_move_to_active(&msm_obj->base, gpu, true, submit->fence);
 
 
 
544	}
 
 
545
546	ret = gpu->funcs->submit(gpu, submit, ctx);
547	priv->lastctx = ctx;
548
 
549	hangcheck_timer_reset(gpu);
550
551	return ret;
552}
553
554/*
555 * Init/Cleanup:
556 */
557
558static irqreturn_t irq_handler(int irq, void *data)
559{
560	struct msm_gpu *gpu = data;
561	return gpu->funcs->irq(gpu);
562}
563
564static const char *clk_names[] = {
565		"src_clk", "core_clk", "iface_clk", "mem_clk", "mem_iface_clk",
566		"alt_mem_iface_clk",
567};
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
568
569int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
570		struct msm_gpu *gpu, const struct msm_gpu_funcs *funcs,
571		const char *name, const char *ioname, const char *irqname, int ringsz)
572{
573	struct iommu_domain *iommu;
574	int i, ret;
 
 
575
576	if (WARN_ON(gpu->num_perfcntrs > ARRAY_SIZE(gpu->last_cntrs)))
577		gpu->num_perfcntrs = ARRAY_SIZE(gpu->last_cntrs);
578
579	gpu->dev = drm;
580	gpu->funcs = funcs;
581	gpu->name = name;
582	gpu->inactive = true;
583
584	INIT_LIST_HEAD(&gpu->active_list);
585	INIT_WORK(&gpu->retire_work, retire_worker);
586	INIT_WORK(&gpu->inactive_work, inactive_worker);
587	INIT_WORK(&gpu->recover_work, recover_worker);
588
589	INIT_LIST_HEAD(&gpu->submit_list);
590
591	setup_timer(&gpu->inactive_timer, inactive_handler,
592			(unsigned long)gpu);
593	setup_timer(&gpu->hangcheck_timer, hangcheck_handler,
594			(unsigned long)gpu);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
595
596	spin_lock_init(&gpu->perf_lock);
597
598	BUG_ON(ARRAY_SIZE(clk_names) != ARRAY_SIZE(gpu->grp_clks));
599
600	/* Map registers: */
601	gpu->mmio = msm_ioremap(pdev, ioname, name);
602	if (IS_ERR(gpu->mmio)) {
603		ret = PTR_ERR(gpu->mmio);
604		goto fail;
605	}
606
607	/* Get Interrupt: */
608	gpu->irq = platform_get_irq_byname(pdev, irqname);
609	if (gpu->irq < 0) {
610		ret = gpu->irq;
611		dev_err(drm->dev, "failed to get irq: %d\n", ret);
612		goto fail;
613	}
614
615	ret = devm_request_irq(&pdev->dev, gpu->irq, irq_handler,
616			IRQF_TRIGGER_HIGH, gpu->name, gpu);
617	if (ret) {
618		dev_err(drm->dev, "failed to request IRQ%u: %d\n", gpu->irq, ret);
619		goto fail;
620	}
621
622	/* Acquire clocks: */
623	for (i = 0; i < ARRAY_SIZE(clk_names); i++) {
624		gpu->grp_clks[i] = devm_clk_get(&pdev->dev, clk_names[i]);
625		DBG("grp_clks[%s]: %p", clk_names[i], gpu->grp_clks[i]);
626		if (IS_ERR(gpu->grp_clks[i]))
627			gpu->grp_clks[i] = NULL;
628	}
629
630	gpu->ebi1_clk = devm_clk_get(&pdev->dev, "bus_clk");
631	DBG("ebi1_clk: %p", gpu->ebi1_clk);
632	if (IS_ERR(gpu->ebi1_clk))
633		gpu->ebi1_clk = NULL;
634
635	/* Acquire regulators: */
636	gpu->gpu_reg = devm_regulator_get(&pdev->dev, "vdd");
637	DBG("gpu_reg: %p", gpu->gpu_reg);
638	if (IS_ERR(gpu->gpu_reg))
639		gpu->gpu_reg = NULL;
640
641	gpu->gpu_cx = devm_regulator_get(&pdev->dev, "vddcx");
642	DBG("gpu_cx: %p", gpu->gpu_cx);
643	if (IS_ERR(gpu->gpu_cx))
644		gpu->gpu_cx = NULL;
645
646	/* Setup IOMMU.. eventually we will (I think) do this once per context
647	 * and have separate page tables per context.  For now, to keep things
648	 * simple and to get something working, just use a single address space:
649	 */
650	iommu = iommu_domain_alloc(&platform_bus_type);
651	if (iommu) {
652		dev_info(drm->dev, "%s: using IOMMU\n", name);
653		gpu->mmu = msm_iommu_new(&pdev->dev, iommu);
654		if (IS_ERR(gpu->mmu)) {
655			ret = PTR_ERR(gpu->mmu);
656			dev_err(drm->dev, "failed to init iommu: %d\n", ret);
657			gpu->mmu = NULL;
658			iommu_domain_free(iommu);
659			goto fail;
660		}
661
662	} else {
663		dev_info(drm->dev, "%s: no IOMMU, fallback to VRAM carveout!\n", name);
664	}
665	gpu->id = msm_register_mmu(drm, gpu->mmu);
666
 
667
668	/* Create ringbuffer: */
669	mutex_lock(&drm->struct_mutex);
670	gpu->rb = msm_ringbuffer_new(gpu, ringsz);
671	mutex_unlock(&drm->struct_mutex);
672	if (IS_ERR(gpu->rb)) {
673		ret = PTR_ERR(gpu->rb);
674		gpu->rb = NULL;
675		dev_err(drm->dev, "could not create ringbuffer: %d\n", ret);
676		goto fail;
677	}
678
679	bs_init(gpu);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
680
681	return 0;
682
683fail:
 
 
 
 
 
 
 
 
684	return ret;
685}
686
687void msm_gpu_cleanup(struct msm_gpu *gpu)
688{
 
 
689	DBG("%s", gpu->name);
690
691	WARN_ON(!list_empty(&gpu->active_list));
 
 
 
692
693	bs_fini(gpu);
694
695	if (gpu->rb) {
696		if (gpu->rb_iova)
697			msm_gem_put_iova(gpu->rb->bo, gpu->id);
698		msm_ringbuffer_destroy(gpu->rb);
699	}
700
701	if (gpu->mmu)
702		gpu->mmu->funcs->destroy(gpu->mmu);
 
 
 
 
 
703}
v6.9.4
   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 "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
 226	/* Don't record write only objects */
 227	state_bo->size = obj->size;
 228	state_bo->iova = iova;
 229
 230	BUILD_BUG_ON(sizeof(state_bo->name) != sizeof(to_msm_bo(obj)->name));
 231
 232	memcpy(state_bo->name, to_msm_bo(obj)->name, sizeof(state_bo->name));
 233
 234	if (full) {
 235		void *ptr;
 236
 237		state_bo->data = kvmalloc(obj->size, GFP_KERNEL);
 238		if (!state_bo->data)
 239			goto out;
 240
 241		msm_gem_lock(obj);
 242		ptr = msm_gem_get_vaddr_active(obj);
 243		msm_gem_unlock(obj);
 244		if (IS_ERR(ptr)) {
 245			kvfree(state_bo->data);
 246			state_bo->data = NULL;
 247			goto out;
 248		}
 249
 250		memcpy(state_bo->data, ptr, obj->size);
 251		msm_gem_put_vaddr(obj);
 252	}
 253out:
 254	state->nr_bos++;
 255}
 256
 257static void msm_gpu_crashstate_capture(struct msm_gpu *gpu,
 258		struct msm_gem_submit *submit, char *comm, char *cmd)
 259{
 260	struct msm_gpu_state *state;
 261
 262	/* Check if the target supports capturing crash state */
 263	if (!gpu->funcs->gpu_state_get)
 264		return;
 265
 266	/* Only save one crash state at a time */
 267	if (gpu->crashstate)
 268		return;
 269
 270	state = gpu->funcs->gpu_state_get(gpu);
 271	if (IS_ERR_OR_NULL(state))
 272		return;
 273
 274	/* Fill in the additional crash state information */
 275	state->comm = kstrdup(comm, GFP_KERNEL);
 276	state->cmd = kstrdup(cmd, GFP_KERNEL);
 277	state->fault_info = gpu->fault_info;
 278
 279	if (submit) {
 280		int i;
 281
 282		state->bos = kcalloc(submit->nr_bos,
 283			sizeof(struct msm_gpu_state_bo), GFP_KERNEL);
 284
 285		for (i = 0; state->bos && i < submit->nr_bos; i++) {
 286			msm_gpu_crashstate_get_bo(state, submit->bos[i].obj,
 287						  submit->bos[i].iova,
 288						  should_dump(submit, i));
 289		}
 290	}
 291
 292	/* Set the active crash state to be dumped on failure */
 293	gpu->crashstate = state;
 294
 295	dev_coredumpm(&gpu->pdev->dev, THIS_MODULE, gpu, 0, GFP_KERNEL,
 296		msm_gpu_devcoredump_read, msm_gpu_devcoredump_free);
 297}
 298#else
 299static void msm_gpu_crashstate_capture(struct msm_gpu *gpu,
 300		struct msm_gem_submit *submit, char *comm, char *cmd)
 301{
 
 
 
 302}
 303#endif
 304
 305/*
 306 * Hangcheck detection for locked gpu:
 307 */
 308
 309static struct msm_gem_submit *
 310find_submit(struct msm_ringbuffer *ring, uint32_t fence)
 311{
 312	struct msm_gem_submit *submit;
 313	unsigned long flags;
 314
 315	spin_lock_irqsave(&ring->submit_lock, flags);
 316	list_for_each_entry(submit, &ring->submits, node) {
 317		if (submit->seqno == fence) {
 318			spin_unlock_irqrestore(&ring->submit_lock, flags);
 319			return submit;
 320		}
 321	}
 322	spin_unlock_irqrestore(&ring->submit_lock, flags);
 323
 324	return NULL;
 325}
 326
 327static void retire_submits(struct msm_gpu *gpu);
 328
 329static void get_comm_cmdline(struct msm_gem_submit *submit, char **comm, char **cmd)
 330{
 331	struct msm_file_private *ctx = submit->queue->ctx;
 332	struct task_struct *task;
 333
 334	WARN_ON(!mutex_is_locked(&submit->gpu->lock));
 335
 336	/* Note that kstrdup will return NULL if argument is NULL: */
 337	*comm = kstrdup(ctx->comm, GFP_KERNEL);
 338	*cmd  = kstrdup(ctx->cmdline, GFP_KERNEL);
 339
 340	task = get_pid_task(submit->pid, PIDTYPE_PID);
 341	if (!task)
 342		return;
 343
 344	if (!*comm)
 345		*comm = kstrdup(task->comm, GFP_KERNEL);
 346
 347	if (!*cmd)
 348		*cmd = kstrdup_quotable_cmdline(task, GFP_KERNEL);
 349
 350	put_task_struct(task);
 351}
 352
 353static void recover_worker(struct kthread_work *work)
 354{
 355	struct msm_gpu *gpu = container_of(work, struct msm_gpu, recover_work);
 356	struct drm_device *dev = gpu->dev;
 357	struct msm_drm_private *priv = dev->dev_private;
 358	struct msm_gem_submit *submit;
 359	struct msm_ringbuffer *cur_ring = gpu->funcs->active_ring(gpu);
 360	char *comm = NULL, *cmd = NULL;
 361	int i;
 362
 363	mutex_lock(&gpu->lock);
 364
 365	DRM_DEV_ERROR(dev->dev, "%s: hangcheck recover!\n", gpu->name);
 366
 367	submit = find_submit(cur_ring, cur_ring->memptrs->fence + 1);
 368
 369	/*
 370	 * If the submit retired while we were waiting for the worker to run,
 371	 * or waiting to acquire the gpu lock, then nothing more to do.
 372	 */
 373	if (!submit)
 374		goto out_unlock;
 375
 376	/* Increment the fault counts */
 377	submit->queue->faults++;
 378	if (submit->aspace)
 379		submit->aspace->faults++;
 380
 381	get_comm_cmdline(submit, &comm, &cmd);
 382
 383	if (comm && cmd) {
 384		DRM_DEV_ERROR(dev->dev, "%s: offending task: %s (%s)\n",
 385			      gpu->name, comm, cmd);
 386
 387		msm_rd_dump_submit(priv->hangrd, submit,
 388				   "offending task: %s (%s)", comm, cmd);
 389	} else {
 390		DRM_DEV_ERROR(dev->dev, "%s: offending task: unknown\n", gpu->name);
 391
 392		msm_rd_dump_submit(priv->hangrd, submit, NULL);
 393	}
 394
 395	/* Record the crash state */
 396	pm_runtime_get_sync(&gpu->pdev->dev);
 397	msm_gpu_crashstate_capture(gpu, submit, comm, cmd);
 398
 399	kfree(cmd);
 400	kfree(comm);
 401
 402	/*
 403	 * Update all the rings with the latest and greatest fence.. this
 404	 * needs to happen after msm_rd_dump_submit() to ensure that the
 405	 * bo's referenced by the offending submit are still around.
 406	 */
 407	for (i = 0; i < gpu->nr_rings; i++) {
 408		struct msm_ringbuffer *ring = gpu->rb[i];
 409
 410		uint32_t fence = ring->memptrs->fence;
 411
 412		/*
 413		 * For the current (faulting?) ring/submit advance the fence by
 414		 * one more to clear the faulting submit
 415		 */
 416		if (ring == cur_ring)
 417			ring->memptrs->fence = ++fence;
 418
 419		msm_update_fence(ring->fctx, fence);
 420	}
 421
 422	if (msm_gpu_active(gpu)) {
 423		/* retire completed submits, plus the one that hung: */
 424		retire_submits(gpu);
 425
 
 426		gpu->funcs->recover(gpu);
 427
 428		/*
 429		 * Replay all remaining submits starting with highest priority
 430		 * ring
 431		 */
 432		for (i = 0; i < gpu->nr_rings; i++) {
 433			struct msm_ringbuffer *ring = gpu->rb[i];
 434			unsigned long flags;
 435
 436			spin_lock_irqsave(&ring->submit_lock, flags);
 437			list_for_each_entry(submit, &ring->submits, node)
 438				gpu->funcs->submit(gpu, submit);
 439			spin_unlock_irqrestore(&ring->submit_lock, flags);
 440		}
 441	}
 442
 443	pm_runtime_put(&gpu->pdev->dev);
 444
 445out_unlock:
 446	mutex_unlock(&gpu->lock);
 447
 448	msm_gpu_retire(gpu);
 449}
 450
 451static void fault_worker(struct kthread_work *work)
 452{
 453	struct msm_gpu *gpu = container_of(work, struct msm_gpu, fault_work);
 454	struct msm_gem_submit *submit;
 455	struct msm_ringbuffer *cur_ring = gpu->funcs->active_ring(gpu);
 456	char *comm = NULL, *cmd = NULL;
 457
 458	mutex_lock(&gpu->lock);
 459
 460	submit = find_submit(cur_ring, cur_ring->memptrs->fence + 1);
 461	if (submit && submit->fault_dumped)
 462		goto resume_smmu;
 463
 464	if (submit) {
 465		get_comm_cmdline(submit, &comm, &cmd);
 466
 467		/*
 468		 * When we get GPU iova faults, we can get 1000s of them,
 469		 * but we really only want to log the first one.
 470		 */
 471		submit->fault_dumped = true;
 472	}
 473
 474	/* Record the crash state */
 475	pm_runtime_get_sync(&gpu->pdev->dev);
 476	msm_gpu_crashstate_capture(gpu, submit, comm, cmd);
 477	pm_runtime_put_sync(&gpu->pdev->dev);
 478
 479	kfree(cmd);
 480	kfree(comm);
 481
 482resume_smmu:
 483	memset(&gpu->fault_info, 0, sizeof(gpu->fault_info));
 484	gpu->aspace->mmu->funcs->resume_translation(gpu->aspace->mmu);
 485
 486	mutex_unlock(&gpu->lock);
 487}
 488
 489static void hangcheck_timer_reset(struct msm_gpu *gpu)
 490{
 491	struct msm_drm_private *priv = gpu->dev->dev_private;
 492	mod_timer(&gpu->hangcheck_timer,
 493			round_jiffies_up(jiffies + msecs_to_jiffies(priv->hangcheck_period)));
 494}
 495
 496static bool made_progress(struct msm_gpu *gpu, struct msm_ringbuffer *ring)
 497{
 498	if (ring->hangcheck_progress_retries >= DRM_MSM_HANGCHECK_PROGRESS_RETRIES)
 499		return false;
 500
 501	if (!gpu->funcs->progress)
 502		return false;
 503
 504	if (!gpu->funcs->progress(gpu, ring))
 505		return false;
 506
 507	ring->hangcheck_progress_retries++;
 508	return true;
 509}
 510
 511static void hangcheck_handler(struct timer_list *t)
 512{
 513	struct msm_gpu *gpu = from_timer(gpu, t, hangcheck_timer);
 514	struct drm_device *dev = gpu->dev;
 515	struct msm_ringbuffer *ring = gpu->funcs->active_ring(gpu);
 516	uint32_t fence = ring->memptrs->fence;
 517
 518	if (fence != ring->hangcheck_fence) {
 519		/* some progress has been made.. ya! */
 520		ring->hangcheck_fence = fence;
 521		ring->hangcheck_progress_retries = 0;
 522	} else if (fence_before(fence, ring->fctx->last_fence) &&
 523			!made_progress(gpu, ring)) {
 524		/* no progress and not done.. hung! */
 525		ring->hangcheck_fence = fence;
 526		ring->hangcheck_progress_retries = 0;
 527		DRM_DEV_ERROR(dev->dev, "%s: hangcheck detected gpu lockup rb %d!\n",
 528				gpu->name, ring->id);
 529		DRM_DEV_ERROR(dev->dev, "%s:     completed fence: %u\n",
 530				gpu->name, fence);
 531		DRM_DEV_ERROR(dev->dev, "%s:     submitted fence: %u\n",
 532				gpu->name, ring->fctx->last_fence);
 533
 534		kthread_queue_work(gpu->worker, &gpu->recover_work);
 535	}
 536
 537	/* if still more pending work, reset the hangcheck timer: */
 538	if (fence_after(ring->fctx->last_fence, ring->hangcheck_fence))
 539		hangcheck_timer_reset(gpu);
 540
 541	/* workaround for missing irq: */
 542	msm_gpu_retire(gpu);
 543}
 544
 545/*
 546 * Performance Counters:
 547 */
 548
 549/* called under perf_lock */
 550static int update_hw_cntrs(struct msm_gpu *gpu, uint32_t ncntrs, uint32_t *cntrs)
 551{
 552	uint32_t current_cntrs[ARRAY_SIZE(gpu->last_cntrs)];
 553	int i, n = min(ncntrs, gpu->num_perfcntrs);
 554
 555	/* read current values: */
 556	for (i = 0; i < gpu->num_perfcntrs; i++)
 557		current_cntrs[i] = gpu_read(gpu, gpu->perfcntrs[i].sample_reg);
 558
 559	/* update cntrs: */
 560	for (i = 0; i < n; i++)
 561		cntrs[i] = current_cntrs[i] - gpu->last_cntrs[i];
 562
 563	/* save current values: */
 564	for (i = 0; i < gpu->num_perfcntrs; i++)
 565		gpu->last_cntrs[i] = current_cntrs[i];
 566
 567	return n;
 568}
 569
 570static void update_sw_cntrs(struct msm_gpu *gpu)
 571{
 572	ktime_t time;
 573	uint32_t elapsed;
 574	unsigned long flags;
 575
 576	spin_lock_irqsave(&gpu->perf_lock, flags);
 577	if (!gpu->perfcntr_active)
 578		goto out;
 579
 580	time = ktime_get();
 581	elapsed = ktime_to_us(ktime_sub(time, gpu->last_sample.time));
 582
 583	gpu->totaltime += elapsed;
 584	if (gpu->last_sample.active)
 585		gpu->activetime += elapsed;
 586
 587	gpu->last_sample.active = msm_gpu_active(gpu);
 588	gpu->last_sample.time = time;
 589
 590out:
 591	spin_unlock_irqrestore(&gpu->perf_lock, flags);
 592}
 593
 594void msm_gpu_perfcntr_start(struct msm_gpu *gpu)
 595{
 596	unsigned long flags;
 597
 598	pm_runtime_get_sync(&gpu->pdev->dev);
 599
 600	spin_lock_irqsave(&gpu->perf_lock, flags);
 601	/* we could dynamically enable/disable perfcntr registers too.. */
 602	gpu->last_sample.active = msm_gpu_active(gpu);
 603	gpu->last_sample.time = ktime_get();
 604	gpu->activetime = gpu->totaltime = 0;
 605	gpu->perfcntr_active = true;
 606	update_hw_cntrs(gpu, 0, NULL);
 607	spin_unlock_irqrestore(&gpu->perf_lock, flags);
 608}
 609
 610void msm_gpu_perfcntr_stop(struct msm_gpu *gpu)
 611{
 612	gpu->perfcntr_active = false;
 613	pm_runtime_put_sync(&gpu->pdev->dev);
 614}
 615
 616/* returns -errno or # of cntrs sampled */
 617int msm_gpu_perfcntr_sample(struct msm_gpu *gpu, uint32_t *activetime,
 618		uint32_t *totaltime, uint32_t ncntrs, uint32_t *cntrs)
 619{
 620	unsigned long flags;
 621	int ret;
 622
 623	spin_lock_irqsave(&gpu->perf_lock, flags);
 624
 625	if (!gpu->perfcntr_active) {
 626		ret = -EINVAL;
 627		goto out;
 628	}
 629
 630	*activetime = gpu->activetime;
 631	*totaltime = gpu->totaltime;
 632
 633	gpu->activetime = gpu->totaltime = 0;
 634
 635	ret = update_hw_cntrs(gpu, ncntrs, cntrs);
 636
 637out:
 638	spin_unlock_irqrestore(&gpu->perf_lock, flags);
 639
 640	return ret;
 641}
 642
 643/*
 644 * Cmdstream submission/retirement:
 645 */
 646
 647static void retire_submit(struct msm_gpu *gpu, struct msm_ringbuffer *ring,
 648		struct msm_gem_submit *submit)
 649{
 650	int index = submit->seqno % MSM_GPU_SUBMIT_STATS_COUNT;
 651	volatile struct msm_gpu_submit_stats *stats;
 652	u64 elapsed, clock = 0, cycles;
 653	unsigned long flags;
 654
 655	stats = &ring->memptrs->stats[index];
 656	/* Convert 19.2Mhz alwayson ticks to nanoseconds for elapsed time */
 657	elapsed = (stats->alwayson_end - stats->alwayson_start) * 10000;
 658	do_div(elapsed, 192);
 659
 660	cycles = stats->cpcycles_end - stats->cpcycles_start;
 
 661
 662	/* Calculate the clock frequency from the number of CP cycles */
 663	if (elapsed) {
 664		clock = cycles * 1000;
 665		do_div(clock, elapsed);
 
 
 666	}
 
 667
 668	submit->queue->ctx->elapsed_ns += elapsed;
 669	submit->queue->ctx->cycles     += cycles;
 
 
 
 670
 671	trace_msm_gpu_submit_retired(submit, elapsed, clock,
 672		stats->alwayson_start, stats->alwayson_end);
 673
 674	msm_submit_retire(submit);
 675
 676	pm_runtime_mark_last_busy(&gpu->pdev->dev);
 677
 678	spin_lock_irqsave(&ring->submit_lock, flags);
 679	list_del(&submit->node);
 680	spin_unlock_irqrestore(&ring->submit_lock, flags);
 681
 682	/* Update devfreq on transition from active->idle: */
 683	mutex_lock(&gpu->active_lock);
 684	gpu->active_submits--;
 685	WARN_ON(gpu->active_submits < 0);
 686	if (!gpu->active_submits) {
 687		msm_devfreq_idle(gpu);
 688		pm_runtime_put_autosuspend(&gpu->pdev->dev);
 689	}
 690
 691	mutex_unlock(&gpu->active_lock);
 
 692
 693	msm_gem_submit_put(submit);
 694}
 695
 696static void retire_submits(struct msm_gpu *gpu)
 697{
 698	int i;
 699
 700	/* Retire the commits starting with highest priority */
 701	for (i = 0; i < gpu->nr_rings; i++) {
 702		struct msm_ringbuffer *ring = gpu->rb[i];
 703
 704		while (true) {
 705			struct msm_gem_submit *submit = NULL;
 706			unsigned long flags;
 707
 708			spin_lock_irqsave(&ring->submit_lock, flags);
 709			submit = list_first_entry_or_null(&ring->submits,
 710					struct msm_gem_submit, node);
 711			spin_unlock_irqrestore(&ring->submit_lock, flags);
 712
 713			/*
 714			 * If no submit, we are done.  If submit->fence hasn't
 715			 * been signalled, then later submits are not signalled
 716			 * either, so we are also done.
 717			 */
 718			if (submit && dma_fence_is_signaled(submit->hw_fence)) {
 719				retire_submit(gpu, ring, submit);
 720			} else {
 721				break;
 722			}
 723		}
 724	}
 725
 726	wake_up_all(&gpu->retire_event);
 727}
 728
 729static void retire_worker(struct kthread_work *work)
 730{
 731	struct msm_gpu *gpu = container_of(work, struct msm_gpu, retire_work);
 732
 733	retire_submits(gpu);
 734}
 735
 736/* call from irq handler to schedule work to retire bo's */
 737void msm_gpu_retire(struct msm_gpu *gpu)
 738{
 739	int i;
 740
 741	for (i = 0; i < gpu->nr_rings; i++)
 742		msm_update_fence(gpu->rb[i]->fctx, gpu->rb[i]->memptrs->fence);
 743
 744	kthread_queue_work(gpu->worker, &gpu->retire_work);
 745	update_sw_cntrs(gpu);
 746}
 747
 748/* add bo's to gpu's ring, and kick gpu: */
 749void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
 
 750{
 751	struct msm_ringbuffer *ring = submit->ring;
 752	unsigned long flags;
 
 
 
 
 
 
 
 753
 754	WARN_ON(!mutex_is_locked(&gpu->lock));
 755
 756	pm_runtime_get_sync(&gpu->pdev->dev);
 757
 758	msm_gpu_hw_init(gpu);
 759
 760	submit->seqno = submit->hw_fence->seqno;
 761
 762	update_sw_cntrs(gpu);
 763
 764	/*
 765	 * ring->submits holds a ref to the submit, to deal with the case
 766	 * that a submit completes before msm_ioctl_gem_submit() returns.
 767	 */
 768	msm_gem_submit_get(submit);
 
 
 
 
 
 
 
 
 
 
 
 769
 770	spin_lock_irqsave(&ring->submit_lock, flags);
 771	list_add_tail(&submit->node, &ring->submits);
 772	spin_unlock_irqrestore(&ring->submit_lock, flags);
 773
 774	/* Update devfreq on transition from idle->active: */
 775	mutex_lock(&gpu->active_lock);
 776	if (!gpu->active_submits) {
 777		pm_runtime_get(&gpu->pdev->dev);
 778		msm_devfreq_active(gpu);
 779	}
 780	gpu->active_submits++;
 781	mutex_unlock(&gpu->active_lock);
 782
 783	gpu->funcs->submit(gpu, submit);
 784	gpu->cur_ctx_seqno = submit->queue->ctx->seqno;
 785
 786	pm_runtime_put(&gpu->pdev->dev);
 787	hangcheck_timer_reset(gpu);
 
 
 788}
 789
 790/*
 791 * Init/Cleanup:
 792 */
 793
 794static irqreturn_t irq_handler(int irq, void *data)
 795{
 796	struct msm_gpu *gpu = data;
 797	return gpu->funcs->irq(gpu);
 798}
 799
 800static int get_clocks(struct platform_device *pdev, struct msm_gpu *gpu)
 801{
 802	int ret = devm_clk_bulk_get_all(&pdev->dev, &gpu->grp_clks);
 803
 804	if (ret < 1) {
 805		gpu->nr_clocks = 0;
 806		return ret;
 807	}
 808
 809	gpu->nr_clocks = ret;
 810
 811	gpu->core_clk = msm_clk_bulk_get_clock(gpu->grp_clks,
 812		gpu->nr_clocks, "core");
 813
 814	gpu->rbbmtimer_clk = msm_clk_bulk_get_clock(gpu->grp_clks,
 815		gpu->nr_clocks, "rbbmtimer");
 816
 817	return 0;
 818}
 819
 820/* Return a new address space for a msm_drm_private instance */
 821struct msm_gem_address_space *
 822msm_gpu_create_private_address_space(struct msm_gpu *gpu, struct task_struct *task)
 823{
 824	struct msm_gem_address_space *aspace = NULL;
 825	if (!gpu)
 826		return NULL;
 827
 828	/*
 829	 * If the target doesn't support private address spaces then return
 830	 * the global one
 831	 */
 832	if (gpu->funcs->create_private_address_space) {
 833		aspace = gpu->funcs->create_private_address_space(gpu);
 834		if (!IS_ERR(aspace))
 835			aspace->pid = get_pid(task_pid(task));
 836	}
 837
 838	if (IS_ERR_OR_NULL(aspace))
 839		aspace = msm_gem_address_space_get(gpu->aspace);
 840
 841	return aspace;
 842}
 843
 844int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 845		struct msm_gpu *gpu, const struct msm_gpu_funcs *funcs,
 846		const char *name, struct msm_gpu_config *config)
 847{
 848	struct msm_drm_private *priv = drm->dev_private;
 849	int i, ret, nr_rings = config->nr_rings;
 850	void *memptrs;
 851	uint64_t memptrs_iova;
 852
 853	if (WARN_ON(gpu->num_perfcntrs > ARRAY_SIZE(gpu->last_cntrs)))
 854		gpu->num_perfcntrs = ARRAY_SIZE(gpu->last_cntrs);
 855
 856	gpu->dev = drm;
 857	gpu->funcs = funcs;
 858	gpu->name = name;
 
 859
 860	gpu->worker = kthread_create_worker(0, "gpu-worker");
 861	if (IS_ERR(gpu->worker)) {
 862		ret = PTR_ERR(gpu->worker);
 863		gpu->worker = NULL;
 864		goto fail;
 865	}
 866
 867	sched_set_fifo_low(gpu->worker->task);
 868
 869	mutex_init(&gpu->active_lock);
 870	mutex_init(&gpu->lock);
 871	init_waitqueue_head(&gpu->retire_event);
 872	kthread_init_work(&gpu->retire_work, retire_worker);
 873	kthread_init_work(&gpu->recover_work, recover_worker);
 874	kthread_init_work(&gpu->fault_work, fault_worker);
 875
 876	priv->hangcheck_period = DRM_MSM_HANGCHECK_DEFAULT_PERIOD;
 877
 878	/*
 879	 * If progress detection is supported, halve the hangcheck timer
 880	 * duration, as it takes two iterations of the hangcheck handler
 881	 * to detect a hang.
 882	 */
 883	if (funcs->progress)
 884		priv->hangcheck_period /= 2;
 885
 886	timer_setup(&gpu->hangcheck_timer, hangcheck_handler, 0);
 887
 888	spin_lock_init(&gpu->perf_lock);
 889
 
 890
 891	/* Map registers: */
 892	gpu->mmio = msm_ioremap(pdev, config->ioname);
 893	if (IS_ERR(gpu->mmio)) {
 894		ret = PTR_ERR(gpu->mmio);
 895		goto fail;
 896	}
 897
 898	/* Get Interrupt: */
 899	gpu->irq = platform_get_irq(pdev, 0);
 900	if (gpu->irq < 0) {
 901		ret = gpu->irq;
 
 902		goto fail;
 903	}
 904
 905	ret = devm_request_irq(&pdev->dev, gpu->irq, irq_handler,
 906			IRQF_TRIGGER_HIGH, "gpu-irq", gpu);
 907	if (ret) {
 908		DRM_DEV_ERROR(drm->dev, "failed to request IRQ%u: %d\n", gpu->irq, ret);
 909		goto fail;
 910	}
 911
 912	ret = get_clocks(pdev, gpu);
 913	if (ret)
 914		goto fail;
 
 
 
 
 915
 916	gpu->ebi1_clk = msm_clk_get(pdev, "bus");
 917	DBG("ebi1_clk: %p", gpu->ebi1_clk);
 918	if (IS_ERR(gpu->ebi1_clk))
 919		gpu->ebi1_clk = NULL;
 920
 921	/* Acquire regulators: */
 922	gpu->gpu_reg = devm_regulator_get(&pdev->dev, "vdd");
 923	DBG("gpu_reg: %p", gpu->gpu_reg);
 924	if (IS_ERR(gpu->gpu_reg))
 925		gpu->gpu_reg = NULL;
 926
 927	gpu->gpu_cx = devm_regulator_get(&pdev->dev, "vddcx");
 928	DBG("gpu_cx: %p", gpu->gpu_cx);
 929	if (IS_ERR(gpu->gpu_cx))
 930		gpu->gpu_cx = NULL;
 931
 932	gpu->pdev = pdev;
 933	platform_set_drvdata(pdev, &gpu->adreno_smmu);
 934
 935	msm_devfreq_init(gpu);
 
 
 
 
 
 
 
 
 
 
 
 936
 
 
 
 
 937
 938	gpu->aspace = gpu->funcs->create_address_space(gpu, pdev);
 939
 940	if (gpu->aspace == NULL)
 941		DRM_DEV_INFO(drm->dev, "%s: no IOMMU, fallback to VRAM carveout!\n", name);
 942	else if (IS_ERR(gpu->aspace)) {
 943		ret = PTR_ERR(gpu->aspace);
 
 
 
 
 944		goto fail;
 945	}
 946
 947	memptrs = msm_gem_kernel_new(drm,
 948		sizeof(struct msm_rbmemptrs) * nr_rings,
 949		check_apriv(gpu, MSM_BO_WC), gpu->aspace, &gpu->memptrs_bo,
 950		&memptrs_iova);
 951
 952	if (IS_ERR(memptrs)) {
 953		ret = PTR_ERR(memptrs);
 954		DRM_DEV_ERROR(drm->dev, "could not allocate memptrs: %d\n", ret);
 955		goto fail;
 956	}
 957
 958	msm_gem_object_set_name(gpu->memptrs_bo, "memptrs");
 959
 960	if (nr_rings > ARRAY_SIZE(gpu->rb)) {
 961		DRM_DEV_INFO_ONCE(drm->dev, "Only creating %zu ringbuffers\n",
 962			ARRAY_SIZE(gpu->rb));
 963		nr_rings = ARRAY_SIZE(gpu->rb);
 964	}
 965
 966	/* Create ringbuffer(s): */
 967	for (i = 0; i < nr_rings; i++) {
 968		gpu->rb[i] = msm_ringbuffer_new(gpu, i, memptrs, memptrs_iova);
 969
 970		if (IS_ERR(gpu->rb[i])) {
 971			ret = PTR_ERR(gpu->rb[i]);
 972			DRM_DEV_ERROR(drm->dev,
 973				"could not create ringbuffer %d: %d\n", i, ret);
 974			goto fail;
 975		}
 976
 977		memptrs += sizeof(struct msm_rbmemptrs);
 978		memptrs_iova += sizeof(struct msm_rbmemptrs);
 979	}
 980
 981	gpu->nr_rings = nr_rings;
 982
 983	refcount_set(&gpu->sysprof_active, 1);
 984
 985	return 0;
 986
 987fail:
 988	for (i = 0; i < ARRAY_SIZE(gpu->rb); i++)  {
 989		msm_ringbuffer_destroy(gpu->rb[i]);
 990		gpu->rb[i] = NULL;
 991	}
 992
 993	msm_gem_kernel_put(gpu->memptrs_bo, gpu->aspace);
 994
 995	platform_set_drvdata(pdev, NULL);
 996	return ret;
 997}
 998
 999void msm_gpu_cleanup(struct msm_gpu *gpu)
1000{
1001	int i;
1002
1003	DBG("%s", gpu->name);
1004
1005	for (i = 0; i < ARRAY_SIZE(gpu->rb); i++) {
1006		msm_ringbuffer_destroy(gpu->rb[i]);
1007		gpu->rb[i] = NULL;
1008	}
1009
1010	msm_gem_kernel_put(gpu->memptrs_bo, gpu->aspace);
1011
1012	if (!IS_ERR_OR_NULL(gpu->aspace)) {
1013		gpu->aspace->mmu->funcs->detach(gpu->aspace->mmu);
1014		msm_gem_address_space_put(gpu->aspace);
 
1015	}
1016
1017	if (gpu->worker) {
1018		kthread_destroy_worker(gpu->worker);
1019	}
1020
1021	msm_devfreq_cleanup(gpu);
1022
1023	platform_set_drvdata(gpu->pdev, NULL);
1024}