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	u64 active_runtime;
19	ssize_t len = 0;
20
21	len += sysfs_emit(buf, "queue\ttimestamp\tjobs\truntime\n");
22
23	for (queue = 0; queue < V3D_MAX_QUEUES; queue++) {
24		if (v3d->queue[queue].start_ns)
25			active_runtime = timestamp - v3d->queue[queue].start_ns;
26		else
27			active_runtime = 0;
28
29		/* Each line will display the queue name, timestamp, the number
30		 * of jobs sent to that queue and the runtime, as can be seem here:
31		 *
32		 * queue	timestamp	jobs	runtime
33		 * bin		239043069420	22620	17438164056
34		 * render	239043069420	22619	27284814161
35		 * tfu		239043069420	8763	394592566
36		 * csd		239043069420	3168	10787905530
37		 * cache_clean	239043069420	6127	237375940
38		 */
39		len += sysfs_emit_at(buf, len, "%s\t%llu\t%llu\t%llu\n",
40				     v3d_queue_to_string(queue),
41				     timestamp,
42				     v3d->queue[queue].jobs_sent,
43				     v3d->queue[queue].enabled_ns + active_runtime);
44	}
45
46	return len;
47}
48static DEVICE_ATTR_RO(gpu_stats);
49
50static struct attribute *v3d_sysfs_entries[] = {
51	&dev_attr_gpu_stats.attr,
52	NULL,
53};
54
55static struct attribute_group v3d_sysfs_attr_group = {
56	.attrs = v3d_sysfs_entries,
57};
58
59int
60v3d_sysfs_init(struct device *dev)
61{
62	return sysfs_create_group(&dev->kobj, &v3d_sysfs_attr_group);
63}
64
65void
66v3d_sysfs_destroy(struct device *dev)
67{
68	return sysfs_remove_group(&dev->kobj, &v3d_sysfs_attr_group);
69}