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
20struct 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	mtx_init(&client->ctx_lock, IPL_NONE);
30	INIT_LIST_HEAD(&client->ctx_list);
31
32	return client;
33}
34
35void __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
44static 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
52static 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
68static void
69show_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
93void 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
112