1// SPDX-License-Identifier: MIT
 2/*
 3 * Copyright © 2023 Igalia S.L.
 4 */
 5
 6#include <linux/sched/clock.h>
 7#include <linux/sysfs.h>
 8
 9#include "v3d_drv.h"
10
11static ssize_t
12gpu_stats_show(struct device *dev, struct device_attribute *attr, char *buf)
13{
14	struct drm_device *drm = dev_get_drvdata(dev);
15	struct v3d_dev *v3d = to_v3d_dev(drm);
16	enum v3d_queue queue;
17	u64 timestamp = local_clock();
18	ssize_t len = 0;
19
20	len += sysfs_emit(buf, "queue\ttimestamp\tjobs\truntime\n");
21
22	for (queue = 0; queue < V3D_MAX_QUEUES; queue++) {
23		struct v3d_stats *stats = &v3d->queue[queue].stats;
24		u64 active_runtime, jobs_completed;
25
26		v3d_get_stats(stats, timestamp, &active_runtime, &jobs_completed);
27
28		/* Each line will display the queue name, timestamp, the number
29		 * of jobs sent to that queue and the runtime, as can be seem here:
30		 *
31		 * queue	timestamp	jobs	runtime
32		 * bin		239043069420	22620	17438164056
33		 * render	239043069420	22619	27284814161
34		 * tfu		239043069420	8763	394592566
35		 * csd		239043069420	3168	10787905530
36		 * cache_clean	239043069420	6127	237375940
37		 */
38		len += sysfs_emit_at(buf, len, "%s\t%llu\t%llu\t%llu\n",
39				     v3d_queue_to_string(queue),
40				     timestamp, jobs_completed, active_runtime);
41	}
42
43	return len;
44}
45static DEVICE_ATTR_RO(gpu_stats);
46
47static struct attribute *v3d_sysfs_entries[] = {
48	&dev_attr_gpu_stats.attr,
49	NULL,
50};
51
52static struct attribute_group v3d_sysfs_attr_group = {
53	.attrs = v3d_sysfs_entries,
54};
55
56int
57v3d_sysfs_init(struct device *dev)
58{
59	return sysfs_create_group(&dev->kobj, &v3d_sysfs_attr_group);
60}
61
62void
63v3d_sysfs_destroy(struct device *dev)
64{
65	return sysfs_remove_group(&dev->kobj, &v3d_sysfs_attr_group);
66}