drivers/gpu/drm/v3d/v3d_sysfs.c

   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
  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
  57 v3d_sysfs_init(struct device *dev)
  58 {
  59         return sysfs_create_group(&dev->kobj, &v3d_sysfs_attr_group);
  60 }
  61
  62 void
  63 v3d_sysfs_destroy(struct device *dev)
  64 {
  65         return sysfs_remove_group(&dev->kobj, &v3d_sysfs_attr_group);
  66 }