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 
11 static ssize_t
gpu_stats_show(struct device * dev,struct device_attribute * attr,char * buf)12 gpu_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 }
45 static DEVICE_ATTR_RO(gpu_stats);
46 
47 static struct attribute *v3d_sysfs_entries[] = {
48 	&dev_attr_gpu_stats.attr,
49 	NULL,
50 };
51 
52 static struct attribute_group v3d_sysfs_attr_group = {
53 	.attrs = v3d_sysfs_entries,
54 };
55 
56 int
v3d_sysfs_init(struct device * dev)57 v3d_sysfs_init(struct device *dev)
58 {
59 	return sysfs_create_group(&dev->kobj, &v3d_sysfs_attr_group);
60 }
61 
62 void
v3d_sysfs_destroy(struct device * dev)63 v3d_sysfs_destroy(struct device *dev)
64 {
65 	return sysfs_remove_group(&dev->kobj, &v3d_sysfs_attr_group);
66 }
67