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	spin_lock_init(&client->ctx_lock);
 30	INIT_LIST_HEAD(&client->ctx_list);
 31#ifdef CONFIG_PROC_FS
 32	spin_lock_init(&client->objects_lock);
 33	INIT_LIST_HEAD(&client->objects_list);
 34#endif
 35
 36	return client;
 37}
 38
 39void __i915_drm_client_free(struct kref *kref)
 40{
 41	struct i915_drm_client *client =
 42		container_of(kref, typeof(*client), kref);
 43
 44	kfree(client);
 45}
 46
 47#ifdef CONFIG_PROC_FS
 48static void
 49obj_meminfo(struct drm_i915_gem_object *obj,
 50	    struct drm_memory_stats stats[INTEL_REGION_UNKNOWN])
 51{
 52	const enum intel_region_id id = obj->mm.region ?
 53					obj->mm.region->id : INTEL_REGION_SMEM;
 54	const u64 sz = obj->base.size;
 55
 56	if (obj->base.handle_count > 1)
 57		stats[id].shared += sz;
 58	else
 59		stats[id].private += sz;
 60
 61	if (i915_gem_object_has_pages(obj)) {
 62		stats[id].resident += sz;
 63
 64		if (!dma_resv_test_signaled(obj->base.resv,
 65					    DMA_RESV_USAGE_BOOKKEEP))
 66			stats[id].active += sz;
 67		else if (i915_gem_object_is_shrinkable(obj) &&
 68			 obj->mm.madv == I915_MADV_DONTNEED)
 69			stats[id].purgeable += sz;
 70	}
 71}
 72
 73static void show_meminfo(struct drm_printer *p, struct drm_file *file)
 74{
 75	struct drm_memory_stats stats[INTEL_REGION_UNKNOWN] = {};
 76	struct drm_i915_file_private *fpriv = file->driver_priv;
 77	struct i915_drm_client *client = fpriv->client;
 78	struct drm_i915_private *i915 = fpriv->i915;
 79	struct drm_i915_gem_object *obj;
 80	struct intel_memory_region *mr;
 81	struct list_head __rcu *pos;
 82	unsigned int id;
 83
 84	/* Public objects. */
 85	spin_lock(&file->table_lock);
 86	idr_for_each_entry(&file->object_idr, obj, id)
 87		obj_meminfo(obj, stats);
 88	spin_unlock(&file->table_lock);
 89
 90	/* Internal objects. */
 91	rcu_read_lock();
 92	list_for_each_rcu(pos, &client->objects_list) {
 93		obj = i915_gem_object_get_rcu(list_entry(pos, typeof(*obj),
 94							 client_link));
 95		if (!obj)
 96			continue;
 97		obj_meminfo(obj, stats);
 98		i915_gem_object_put(obj);
 99	}
100	rcu_read_unlock();
101
102	for_each_memory_region(mr, i915, id)
103		drm_print_memory_stats(p,
104				       &stats[id],
105				       DRM_GEM_OBJECT_RESIDENT |
106				       DRM_GEM_OBJECT_PURGEABLE,
107				       mr->uabi_name);
108}
109
110static const char * const uabi_class_names[] = {
111	[I915_ENGINE_CLASS_RENDER] = "render",
112	[I915_ENGINE_CLASS_COPY] = "copy",
113	[I915_ENGINE_CLASS_VIDEO] = "video",
114	[I915_ENGINE_CLASS_VIDEO_ENHANCE] = "video-enhance",
115	[I915_ENGINE_CLASS_COMPUTE] = "compute",
116};
117
118static u64 busy_add(struct i915_gem_context *ctx, unsigned int class)
119{
120	struct i915_gem_engines_iter it;
121	struct intel_context *ce;
122	u64 total = 0;
123
124	for_each_gem_engine(ce, rcu_dereference(ctx->engines), it) {
125		if (ce->engine->uabi_class != class)
126			continue;
127
128		total += intel_context_get_total_runtime_ns(ce);
129	}
130
131	return total;
132}
133
134static void
135show_client_class(struct drm_printer *p,
136		  struct drm_i915_private *i915,
137		  struct i915_drm_client *client,
138		  unsigned int class)
139{
140	const unsigned int capacity = i915->engine_uabi_class_count[class];
141	u64 total = atomic64_read(&client->past_runtime[class]);
142	struct i915_gem_context *ctx;
143
144	rcu_read_lock();
145	list_for_each_entry_rcu(ctx, &client->ctx_list, client_link)
146		total += busy_add(ctx, class);
147	rcu_read_unlock();
148
149	if (capacity)
150		drm_printf(p, "drm-engine-%s:\t%llu ns\n",
151			   uabi_class_names[class], total);
152
153	if (capacity > 1)
154		drm_printf(p, "drm-engine-capacity-%s:\t%u\n",
155			   uabi_class_names[class],
156			   capacity);
157}
158
159void i915_drm_client_fdinfo(struct drm_printer *p, struct drm_file *file)
160{
161	struct drm_i915_file_private *file_priv = file->driver_priv;
162	struct drm_i915_private *i915 = file_priv->i915;
163	unsigned int i;
164
165	/*
166	 * ******************************************************************
167	 * For text output format description please see drm-usage-stats.rst!
168	 * ******************************************************************
169	 */
170
171	show_meminfo(p, file);
172
173	if (GRAPHICS_VER(i915) < 8)
174		return;
175
176	for (i = 0; i < ARRAY_SIZE(uabi_class_names); i++)
177		show_client_class(p, i915, file_priv->client, i);
178}
179
180void i915_drm_client_add_object(struct i915_drm_client *client,
181				struct drm_i915_gem_object *obj)
182{
183	unsigned long flags;
184
185	GEM_WARN_ON(obj->client);
186	GEM_WARN_ON(!list_empty(&obj->client_link));
187
188	spin_lock_irqsave(&client->objects_lock, flags);
189	obj->client = i915_drm_client_get(client);
190	list_add_tail_rcu(&obj->client_link, &client->objects_list);
191	spin_unlock_irqrestore(&client->objects_lock, flags);
192}
193
194void i915_drm_client_remove_object(struct drm_i915_gem_object *obj)
195{
196	struct i915_drm_client *client = fetch_and_zero(&obj->client);
197	unsigned long flags;
198
199	/* Object may not be associated with a client. */
200	if (!client)
201		return;
202
203	spin_lock_irqsave(&client->objects_lock, flags);
204	list_del_rcu(&obj->client_link);
205	spin_unlock_irqrestore(&client->objects_lock, flags);
206
207	i915_drm_client_put(client);
208}
209
210void i915_drm_client_add_context_objects(struct i915_drm_client *client,
211					 struct intel_context *ce)
212{
213	if (ce->state)
214		i915_drm_client_add_object(client, ce->state->obj);
215
216	if (ce->ring != ce->engine->legacy.ring && ce->ring->vma)
217		i915_drm_client_add_object(client, ce->ring->vma->obj);
218}
219#endif