bifrost/r19p0/kernel/drivers/gpu/arm/midgard/mali_kbase_timeline.c - manifest_repos/mali-driver - Git at Google

 /*
  *
  * (C) COPYRIGHT 2015-2019 ARM Limited. All rights reserved.
  *
  * This program is free software and is provided to you under the terms of the
  * GNU General Public License version 2 as published by the Free Software
  * Foundation, and any use by you of this program is subject to the terms
  * of such GNU licence.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, you can access it online at
  * http://www.gnu.org/licenses/gpl-2.0.html.
  *
  * SPDX-License-Identifier: GPL-2.0
  *
  */

 #include "mali_kbase_timeline.h"
 #include "mali_kbase_timeline_priv.h"
 #include "mali_kbase_tracepoints.h"

 #include <mali_kbase.h>
 #include <mali_kbase_jm.h>

 #include <linux/anon_inodes.h>
 #include <linux/atomic.h>
 #include <linux/file.h>
 #include <linux/mutex.h>
 #include <linux/spinlock.h>
 #include <linux/string.h>
 #include <linux/stringify.h>
 #include <linux/timer.h>
 #include <linux/wait.h>


 /* The period of autoflush checker execution in milliseconds. */
 #define AUTOFLUSH_INTERVAL 1000 /* ms */

 /*****************************************************************************/

 /* These values are used in mali_kbase_tracepoints.h
  * to retrieve the streams from a kbase_timeline instance.
  */
 const size_t __obj_stream_offset =
 	offsetof(struct kbase_timeline, streams)
 	+ sizeof(struct kbase_tlstream) * TL_STREAM_TYPE_OBJ;

 const size_t __aux_stream_offset =
 	offsetof(struct kbase_timeline, streams)
 	+ sizeof(struct kbase_tlstream) * TL_STREAM_TYPE_AUX;

 /**
  * kbasep_timeline_autoflush_timer_callback - autoflush timer callback
  * @timer:  Timer list
  *
  * Timer is executed periodically to check if any of the stream contains
  * buffer ready to be submitted to user space.
  */
 static void kbasep_timeline_autoflush_timer_callback(struct timer_list *timer)
 {
 	enum tl_stream_type stype;
 	int                 rcode;
 	struct kbase_timeline *timeline =
 		container_of(timer, struct kbase_timeline, autoflush_timer);

 	CSTD_UNUSED(timer);

 	for (stype = (enum tl_stream_type)0; stype < TL_STREAM_TYPE_COUNT;
 			stype++) {
 		struct kbase_tlstream *stream = &timeline->streams[stype];

 		int af_cnt = atomic_read(&stream->autoflush_counter);

 		/* Check if stream contain unflushed data. */
 		if (af_cnt < 0)
 			continue;

 		/* Check if stream should be flushed now. */
 		if (af_cnt != atomic_cmpxchg(
 					&stream->autoflush_counter,
 					af_cnt,
 					af_cnt + 1))
 			continue;
 		if (!af_cnt)
 			continue;

 		/* Autoflush this stream. */
 		kbase_tlstream_flush_stream(stream);
 	}

 	if (atomic_read(&timeline->autoflush_timer_active))
 		rcode = mod_timer(
 				&timeline->autoflush_timer,
 				jiffies + msecs_to_jiffies(AUTOFLUSH_INTERVAL));
 	CSTD_UNUSED(rcode);
 }


 /*****************************************************************************/

 int kbase_timeline_init(struct kbase_timeline **timeline,
 		atomic_t *timeline_is_enabled)
 {
 	enum tl_stream_type i;
 	struct kbase_timeline *result;

 	if (!timeline || !timeline_is_enabled)
 		return -EINVAL;

 	result = kzalloc(sizeof(*result), GFP_KERNEL);
 	if (!result)
 		return -ENOMEM;

 	mutex_init(&result->reader_lock);
 	init_waitqueue_head(&result->event_queue);

 	/* Prepare stream structures. */
 	for (i = 0; i < TL_STREAM_TYPE_COUNT; i++)
 		kbase_tlstream_init(&result->streams[i], i,
 			&result->event_queue);

 	/* Initialize autoflush timer. */
 	atomic_set(&result->autoflush_timer_active, 0);
 	kbase_timer_setup(&result->autoflush_timer,
 			  kbasep_timeline_autoflush_timer_callback);
 	result->is_enabled = timeline_is_enabled;

 	*timeline = result;
 	return 0;
 }

 void kbase_timeline_term(struct kbase_timeline *timeline)
 {
 	enum tl_stream_type i;

 	if (!timeline)
 		return;

 	for (i = (enum tl_stream_type)0; i < TL_STREAM_TYPE_COUNT; i++)
 		kbase_tlstream_term(&timeline->streams[i]);

 	kfree(timeline);
 }

 static void kbase_create_timeline_objects(struct kbase_device *kbdev)
 {
 	unsigned int lpu_id;
 	unsigned int as_nr;
 	struct kbase_context *kctx;
 	struct kbase_timeline *timeline = kbdev->timeline;
 	struct kbase_tlstream *summary =
 		&timeline->streams[TL_STREAM_TYPE_OBJ_SUMMARY];

 	/* Summarize the LPU objects. */
 	for (lpu_id = 0; lpu_id < kbdev->gpu_props.num_job_slots; lpu_id++) {
 		u32 *lpu =
 			&kbdev->gpu_props.props.raw_props.js_features[lpu_id];
 		__kbase_tlstream_tl_new_lpu(summary, lpu, lpu_id, *lpu);
 	}

 	/* Summarize the Address Space objects. */
 	for (as_nr = 0; as_nr < kbdev->nr_hw_address_spaces; as_nr++)
 		__kbase_tlstream_tl_new_as(summary, &kbdev->as[as_nr], as_nr);

 	/* Create GPU object and make it retain all LPUs and address spaces. */
 	__kbase_tlstream_tl_new_gpu(summary,
 			kbdev,
 			kbdev->gpu_props.props.raw_props.gpu_id,
 			kbdev->gpu_props.num_cores);

 	for (lpu_id = 0; lpu_id < kbdev->gpu_props.num_job_slots; lpu_id++) {
 		void *lpu =
 			&kbdev->gpu_props.props.raw_props.js_features[lpu_id];
 		__kbase_tlstream_tl_lifelink_lpu_gpu(summary, lpu, kbdev);
 	}

 	for (as_nr = 0; as_nr < kbdev->nr_hw_address_spaces; as_nr++)
 		__kbase_tlstream_tl_lifelink_as_gpu(summary,
 				&kbdev->as[as_nr],
 				kbdev);

 	/* Lock the context list, to ensure no changes to the list are made
 	 * while we're summarizing the contexts and their contents.
 	 */
 	mutex_lock(&kbdev->kctx_list_lock);

 	/* For each context in the device... */
 	list_for_each_entry(kctx, &kbdev->kctx_list, kctx_list_link) {
 		/* Summarize the context itself */
 		__kbase_tlstream_tl_new_ctx(summary,
 				kctx,
 				kctx->id,
 				(u32)(kctx->tgid));
 	};

 	/* Reset body stream buffers while holding the kctx lock.
 	 * This ensures we can't fire both summary and normal tracepoints for
 	 * the same objects.
 	 * If we weren't holding the lock, it's possible that the summarized
 	 * objects could have been created, destroyed, or used after we
 	 * constructed the summary stream tracepoints, but before we reset
 	 * the body stream, resulting in losing those object event tracepoints.
 	 */
 	kbase_timeline_streams_body_reset(timeline);

 	mutex_unlock(&kbdev->kctx_list_lock);

 	/* Static object are placed into summary packet that needs to be
 	 * transmitted first. Flush all streams to make it available to
 	 * user space.
 	 */
 	kbase_timeline_streams_flush(timeline);
 }

 #ifdef CONFIG_MALI_DEVFREQ
 static void kbase_tlstream_current_devfreq_target(struct kbase_device *kbdev)
 {
 	struct devfreq *devfreq = kbdev->devfreq;

 	/* Devfreq initialization failure isn't a fatal error, so devfreq might
 	 * be null.
 	 */
 	if (devfreq) {
 		unsigned long cur_freq = 0;

 		mutex_lock(&devfreq->lock);
 #if KERNEL_VERSION(4, 3, 0) > LINUX_VERSION_CODE
 		cur_freq = kbdev->current_nominal_freq;
 #else
 		cur_freq = devfreq->last_status.current_frequency;
 #endif
 		KBASE_TLSTREAM_AUX_DEVFREQ_TARGET(kbdev, (u64)cur_freq);
 		mutex_unlock(&devfreq->lock);
 	}
 }
 #endif /* CONFIG_MALI_DEVFREQ */

 int kbase_timeline_io_acquire(struct kbase_device *kbdev, u32 flags)
 {
 	int ret;
 	u32 tlstream_enabled = TLSTREAM_ENABLED | flags;
 	struct kbase_timeline *timeline = kbdev->timeline;

 	if (!atomic_cmpxchg(timeline->is_enabled, 0, tlstream_enabled)) {
 		int rcode;

 		ret = anon_inode_getfd(
 				"[mali_tlstream]",
 				&kbasep_tlstream_fops,
 				timeline,
 				O_RDONLY | O_CLOEXEC);
 		if (ret < 0) {
 			atomic_set(timeline->is_enabled, 0);
 			return ret;
 		}

 		/* Reset and initialize header streams. */
 		kbase_tlstream_reset(
 			&timeline->streams[TL_STREAM_TYPE_OBJ_SUMMARY]);

 		timeline->obj_header_btc = obj_desc_header_size;
 		timeline->aux_header_btc = aux_desc_header_size;

 		/* Start autoflush timer. */
 		atomic_set(&timeline->autoflush_timer_active, 1);
 		rcode = mod_timer(
 				&timeline->autoflush_timer,
 				jiffies + msecs_to_jiffies(AUTOFLUSH_INTERVAL));
 		CSTD_UNUSED(rcode);

 		/* If job dumping is enabled, readjust the software event's
 		 * timeout as the default value of 3 seconds is often
 		 * insufficient.
 		 */
 		if (flags & BASE_TLSTREAM_JOB_DUMPING_ENABLED) {
 			dev_info(kbdev->dev,
 					"Job dumping is enabled, readjusting the software event's timeout\n");
 			atomic_set(&kbdev->js_data.soft_job_timeout_ms,
 					1800000);
 		}

 		/* Summary stream was cleared during acquire.
 		 * Create static timeline objects that will be
 		 * read by client.
 		 */
 		kbase_create_timeline_objects(kbdev);

 #ifdef CONFIG_MALI_DEVFREQ
 		/* Devfreq target tracepoints are only fired when the target
 		 * changes, so we won't know the current target unless we
 		 * send it now.
 		 */
 		kbase_tlstream_current_devfreq_target(kbdev);
 #endif /* CONFIG_MALI_DEVFREQ */

 	} else {
 		ret = -EBUSY;
 	}

 	return ret;
 }

 void kbase_timeline_streams_flush(struct kbase_timeline *timeline)
 {
 	enum tl_stream_type stype;

 	for (stype = 0; stype < TL_STREAM_TYPE_COUNT; stype++)
 		kbase_tlstream_flush_stream(&timeline->streams[stype]);
 }

 void kbase_timeline_streams_body_reset(struct kbase_timeline *timeline)
 {
 	kbase_tlstream_reset(
 			&timeline->streams[TL_STREAM_TYPE_OBJ]);
 	kbase_tlstream_reset(
 			&timeline->streams[TL_STREAM_TYPE_AUX]);
 }

 #if MALI_UNIT_TEST
 void kbase_timeline_stats(struct kbase_timeline *timeline,
 		u32 *bytes_collected, u32 *bytes_generated)
 {
 	enum tl_stream_type stype;

 	KBASE_DEBUG_ASSERT(bytes_collected);

 	/* Accumulate bytes generated per stream  */
 	*bytes_generated = 0;
 	for (stype = (enum tl_stream_type)0; stype < TL_STREAM_TYPE_COUNT;
 			stype++)
 		*bytes_generated += atomic_read(
 			&timeline->streams[stype].bytes_generated);

 	*bytes_collected = atomic_read(&timeline->bytes_collected);
 }
 #endif /* MALI_UNIT_TEST */
	/*
	*
	* (C) COPYRIGHT 2015-2019 ARM Limited. All rights reserved.
	*
	* This program is free software and is provided to you under the terms of the
	* GNU General Public License version 2 as published by the Free Software
	* Foundation, and any use by you of this program is subject to the terms
	* of such GNU licence.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, you can access it online at
	* http://www.gnu.org/licenses/gpl-2.0.html.
	*
	* SPDX-License-Identifier: GPL-2.0
	*
	*/

	#include "mali_kbase_timeline.h"
	#include "mali_kbase_timeline_priv.h"
	#include "mali_kbase_tracepoints.h"

	#include <mali_kbase.h>
	#include <mali_kbase_jm.h>

	#include <linux/anon_inodes.h>
	#include <linux/atomic.h>
	#include <linux/file.h>
	#include <linux/mutex.h>
	#include <linux/spinlock.h>
	#include <linux/string.h>
	#include <linux/stringify.h>
	#include <linux/timer.h>
	#include <linux/wait.h>


	/* The period of autoflush checker execution in milliseconds. */
	#define AUTOFLUSH_INTERVAL 1000 /* ms */

	/*****************************************************************************/

	/* These values are used in mali_kbase_tracepoints.h
	* to retrieve the streams from a kbase_timeline instance.
	*/
	const size_t __obj_stream_offset =
	offsetof(struct kbase_timeline, streams)
	+ sizeof(struct kbase_tlstream) * TL_STREAM_TYPE_OBJ;

	const size_t __aux_stream_offset =
	offsetof(struct kbase_timeline, streams)
	+ sizeof(struct kbase_tlstream) * TL_STREAM_TYPE_AUX;

	/**
	* kbasep_timeline_autoflush_timer_callback - autoflush timer callback
	* @timer: Timer list
	*
	* Timer is executed periodically to check if any of the stream contains
	* buffer ready to be submitted to user space.
	*/
	static void kbasep_timeline_autoflush_timer_callback(struct timer_list *timer)
	{
	enum tl_stream_type stype;
	int rcode;
	struct kbase_timeline *timeline =
	container_of(timer, struct kbase_timeline, autoflush_timer);

	CSTD_UNUSED(timer);

	for (stype = (enum tl_stream_type)0; stype < TL_STREAM_TYPE_COUNT;
	stype++) {
	struct kbase_tlstream *stream = &timeline->streams[stype];

	int af_cnt = atomic_read(&stream->autoflush_counter);

	/* Check if stream contain unflushed data. */
	if (af_cnt < 0)
	continue;

	/* Check if stream should be flushed now. */
	if (af_cnt != atomic_cmpxchg(
	&stream->autoflush_counter,
	af_cnt,
	af_cnt + 1))
	continue;
	if (!af_cnt)
	continue;

	/* Autoflush this stream. */
	kbase_tlstream_flush_stream(stream);
	}

	if (atomic_read(&timeline->autoflush_timer_active))
	rcode = mod_timer(
	&timeline->autoflush_timer,
	jiffies + msecs_to_jiffies(AUTOFLUSH_INTERVAL));
	CSTD_UNUSED(rcode);
	}



	/*****************************************************************************/

	int kbase_timeline_init(struct kbase_timeline **timeline,
	atomic_t *timeline_is_enabled)
	{
	enum tl_stream_type i;
	struct kbase_timeline *result;

	if (!timeline \|\| !timeline_is_enabled)
	return -EINVAL;

	result = kzalloc(sizeof(*result), GFP_KERNEL);
	if (!result)
	return -ENOMEM;

	mutex_init(&result->reader_lock);
	init_waitqueue_head(&result->event_queue);

	/* Prepare stream structures. */
	for (i = 0; i < TL_STREAM_TYPE_COUNT; i++)
	kbase_tlstream_init(&result->streams[i], i,
	&result->event_queue);

	/* Initialize autoflush timer. */
	atomic_set(&result->autoflush_timer_active, 0);
	kbase_timer_setup(&result->autoflush_timer,
	kbasep_timeline_autoflush_timer_callback);
	result->is_enabled = timeline_is_enabled;

	*timeline = result;
	return 0;
	}

	void kbase_timeline_term(struct kbase_timeline *timeline)
	{
	enum tl_stream_type i;

	if (!timeline)
	return;

	for (i = (enum tl_stream_type)0; i < TL_STREAM_TYPE_COUNT; i++)
	kbase_tlstream_term(&timeline->streams[i]);

	kfree(timeline);
	}

	static void kbase_create_timeline_objects(struct kbase_device *kbdev)
	{
	unsigned int lpu_id;
	unsigned int as_nr;
	struct kbase_context *kctx;
	struct kbase_timeline *timeline = kbdev->timeline;
	struct kbase_tlstream *summary =
	&timeline->streams[TL_STREAM_TYPE_OBJ_SUMMARY];

	/* Summarize the LPU objects. */
	for (lpu_id = 0; lpu_id < kbdev->gpu_props.num_job_slots; lpu_id++) {
	u32 *lpu =
	&kbdev->gpu_props.props.raw_props.js_features[lpu_id];
	__kbase_tlstream_tl_new_lpu(summary, lpu, lpu_id, *lpu);
	}

	/* Summarize the Address Space objects. */
	for (as_nr = 0; as_nr < kbdev->nr_hw_address_spaces; as_nr++)
	__kbase_tlstream_tl_new_as(summary, &kbdev->as[as_nr], as_nr);

	/* Create GPU object and make it retain all LPUs and address spaces. */
	__kbase_tlstream_tl_new_gpu(summary,
	kbdev,
	kbdev->gpu_props.props.raw_props.gpu_id,
	kbdev->gpu_props.num_cores);

	for (lpu_id = 0; lpu_id < kbdev->gpu_props.num_job_slots; lpu_id++) {
	void *lpu =
	&kbdev->gpu_props.props.raw_props.js_features[lpu_id];
	__kbase_tlstream_tl_lifelink_lpu_gpu(summary, lpu, kbdev);
	}

	for (as_nr = 0; as_nr < kbdev->nr_hw_address_spaces; as_nr++)
	__kbase_tlstream_tl_lifelink_as_gpu(summary,
	&kbdev->as[as_nr],
	kbdev);

	/* Lock the context list, to ensure no changes to the list are made
	* while we're summarizing the contexts and their contents.
	*/
	mutex_lock(&kbdev->kctx_list_lock);

	/* For each context in the device... */
	list_for_each_entry(kctx, &kbdev->kctx_list, kctx_list_link) {
	/* Summarize the context itself */
	__kbase_tlstream_tl_new_ctx(summary,
	kctx,
	kctx->id,
	(u32)(kctx->tgid));
	};

	/* Reset body stream buffers while holding the kctx lock.
	* This ensures we can't fire both summary and normal tracepoints for
	* the same objects.
	* If we weren't holding the lock, it's possible that the summarized
	* objects could have been created, destroyed, or used after we
	* constructed the summary stream tracepoints, but before we reset
	* the body stream, resulting in losing those object event tracepoints.
	*/
	kbase_timeline_streams_body_reset(timeline);

	mutex_unlock(&kbdev->kctx_list_lock);

	/* Static object are placed into summary packet that needs to be
	* transmitted first. Flush all streams to make it available to
	* user space.
	*/
	kbase_timeline_streams_flush(timeline);
	}

	#ifdef CONFIG_MALI_DEVFREQ
	static void kbase_tlstream_current_devfreq_target(struct kbase_device *kbdev)
	{
	struct devfreq *devfreq = kbdev->devfreq;

	/* Devfreq initialization failure isn't a fatal error, so devfreq might
	* be null.
	*/
	if (devfreq) {
	unsigned long cur_freq = 0;

	mutex_lock(&devfreq->lock);
	#if KERNEL_VERSION(4, 3, 0) > LINUX_VERSION_CODE
	cur_freq = kbdev->current_nominal_freq;
	#else
	cur_freq = devfreq->last_status.current_frequency;
	#endif
	KBASE_TLSTREAM_AUX_DEVFREQ_TARGET(kbdev, (u64)cur_freq);
	mutex_unlock(&devfreq->lock);
	}
	}
	#endif /* CONFIG_MALI_DEVFREQ */

	int kbase_timeline_io_acquire(struct kbase_device *kbdev, u32 flags)
	{
	int ret;
	u32 tlstream_enabled = TLSTREAM_ENABLED \| flags;
	struct kbase_timeline *timeline = kbdev->timeline;

	if (!atomic_cmpxchg(timeline->is_enabled, 0, tlstream_enabled)) {
	int rcode;

	ret = anon_inode_getfd(
	"[mali_tlstream]",
	&kbasep_tlstream_fops,
	timeline,
	O_RDONLY \| O_CLOEXEC);
	if (ret < 0) {
	atomic_set(timeline->is_enabled, 0);
	return ret;
	}

	/* Reset and initialize header streams. */
	kbase_tlstream_reset(
	&timeline->streams[TL_STREAM_TYPE_OBJ_SUMMARY]);

	timeline->obj_header_btc = obj_desc_header_size;
	timeline->aux_header_btc = aux_desc_header_size;

	/* Start autoflush timer. */
	atomic_set(&timeline->autoflush_timer_active, 1);
	rcode = mod_timer(
	&timeline->autoflush_timer,
	jiffies + msecs_to_jiffies(AUTOFLUSH_INTERVAL));
	CSTD_UNUSED(rcode);

	/* If job dumping is enabled, readjust the software event's
	* timeout as the default value of 3 seconds is often
	* insufficient.
	*/
	if (flags & BASE_TLSTREAM_JOB_DUMPING_ENABLED) {
	dev_info(kbdev->dev,
	"Job dumping is enabled, readjusting the software event's timeout\n");
	atomic_set(&kbdev->js_data.soft_job_timeout_ms,
	1800000);
	}

	/* Summary stream was cleared during acquire.
	* Create static timeline objects that will be
	* read by client.
	*/
	kbase_create_timeline_objects(kbdev);

	#ifdef CONFIG_MALI_DEVFREQ
	/* Devfreq target tracepoints are only fired when the target
	* changes, so we won't know the current target unless we
	* send it now.
	*/
	kbase_tlstream_current_devfreq_target(kbdev);
	#endif /* CONFIG_MALI_DEVFREQ */

	} else {
	ret = -EBUSY;
	}

	return ret;
	}

	void kbase_timeline_streams_flush(struct kbase_timeline *timeline)
	{
	enum tl_stream_type stype;

	for (stype = 0; stype < TL_STREAM_TYPE_COUNT; stype++)
	kbase_tlstream_flush_stream(&timeline->streams[stype]);
	}

	void kbase_timeline_streams_body_reset(struct kbase_timeline *timeline)
	{
	kbase_tlstream_reset(
	&timeline->streams[TL_STREAM_TYPE_OBJ]);
	kbase_tlstream_reset(
	&timeline->streams[TL_STREAM_TYPE_AUX]);
	}

	#if MALI_UNIT_TEST
	void kbase_timeline_stats(struct kbase_timeline *timeline,
	u32 bytes_collected, u32 bytes_generated)
	{
	enum tl_stream_type stype;

	KBASE_DEBUG_ASSERT(bytes_collected);

	/* Accumulate bytes generated per stream */
	*bytes_generated = 0;
	for (stype = (enum tl_stream_type)0; stype < TL_STREAM_TYPE_COUNT;
	stype++)
	*bytes_generated += atomic_read(
	&timeline->streams[stype].bytes_generated);

	*bytes_collected = atomic_read(&timeline->bytes_collected);
	}
	#endif /* MALI_UNIT_TEST */