drivers/gpu/drm/i915/i915_drm_client.c

   1 // SPDX-License-Identifier: MIT
   2 /*
   3  * Copyright © 2020 Intel Corporation
   4  */
   5
   6 #include <linux/kernel.h>
   7 #include <linux/slab.h>
   8 #include <linux/types.h>
   9
  10 #include <uapi/drm/i915_drm.h>
  11
  12 #include <drm/drm_print.h>
  13
  14 #include "gem/i915_gem_context.h"
  15 #include "i915_drm_client.h"
  16 #include "i915_file_private.h"
  17 #include "i915_gem.h"
  18 #include "i915_utils.h"
  19
  20 struct i915_drm_client *i915_drm_client_alloc(void)
  21 {
  22         struct i915_drm_client *client;
  23
  24         client = kzalloc(sizeof(*client), GFP_KERNEL);
  25         if (!client)
  26                 return NULL;
  27
  28         kref_init(&client->kref);
  29         spin_lock_init(&client->ctx_lock);
  30         INIT_LIST_HEAD(&client->ctx_list);
  31
  32         return client;
  33 }
  34
  35 void __i915_drm_client_free(struct kref *kref)
  36 {
  37         struct i915_drm_client *client =
  38                 container_of(kref, typeof(*client), kref);
  39
  40         kfree(client);
  41 }
  42
  43 #ifdef CONFIG_PROC_FS
  44 static const char * const uabi_class_names[] = {
  45         [I915_ENGINE_CLASS_RENDER] = "render",
  46         [I915_ENGINE_CLASS_COPY] = "copy",
  47         [I915_ENGINE_CLASS_VIDEO] = "video",
  48         [I915_ENGINE_CLASS_VIDEO_ENHANCE] = "video-enhance",
  49         [I915_ENGINE_CLASS_COMPUTE] = "compute",
  50 };
  51
  52 static u64 busy_add(struct i915_gem_context *ctx, unsigned int class)
  53 {
  54         struct i915_gem_engines_iter it;
  55         struct intel_context *ce;
  56         u64 total = 0;
  57
  58         for_each_gem_engine(ce, rcu_dereference(ctx->engines), it) {
  59                 if (ce->engine->uabi_class != class)
  60                         continue;
  61
  62                 total += intel_context_get_total_runtime_ns(ce);
  63         }
  64
  65         return total;
  66 }
  67
  68 static void
  69 show_client_class(struct drm_printer *p,
  70                   struct drm_i915_private *i915,
  71                   struct i915_drm_client *client,
  72                   unsigned int class)
  73 {
  74         const unsigned int capacity = i915->engine_uabi_class_count[class];
  75         u64 total = atomic64_read(&client->past_runtime[class]);
  76         struct i915_gem_context *ctx;
  77
  78         rcu_read_lock();
  79         list_for_each_entry_rcu(ctx, &client->ctx_list, client_link)
  80                 total += busy_add(ctx, class);
  81         rcu_read_unlock();
  82
  83         if (capacity)
  84                 drm_printf(p, "drm-engine-%s:\t%llu ns\n",
  85                            uabi_class_names[class], total);
  86
  87         if (capacity > 1)
  88                 drm_printf(p, "drm-engine-capacity-%s:\t%u\n",
  89                            uabi_class_names[class],
  90                            capacity);
  91 }
  92
  93 void i915_drm_client_fdinfo(struct drm_printer *p, struct drm_file *file)
  94 {
  95         struct drm_i915_file_private *file_priv = file->driver_priv;
  96         struct drm_i915_private *i915 = file_priv->i915;
  97         unsigned int i;
  98
  99         /*
 100          * ******************************************************************
 101          * For text output format description please see drm-usage-stats.rst!
 102          * ******************************************************************
 103          */
 104
 105         if (GRAPHICS_VER(i915) < 8)
 106                 return;
 107
 108         for (i = 0; i < ARRAY_SIZE(uabi_class_names); i++)
 109                 show_client_class(p, i915, file_priv->client, i);
 110 }
 111 #endif