1 files changed, 220 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_drm_client.c b/drivers/gpu/drm/i915/i915_drm_client.c
new file mode 100644
index 000000000000..168d7375304b
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_drm_client.c
@@ -0,0 +1,220 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include <uapi/drm/i915_drm.h>
+
+#include <drm/drm_print.h>
+
+#include "gem/i915_gem_context.h"
+#include "i915_drm_client.h"
+#include "i915_file_private.h"
+#include "i915_gem.h"
+#include "i915_utils.h"
+
+struct i915_drm_client *i915_drm_client_alloc(void)
+{
+	struct i915_drm_client *client;
+
+	client = kzalloc(sizeof(*client), GFP_KERNEL);
+	if (!client)
+		return NULL;
+
+	kref_init(&client->kref);
+	spin_lock_init(&client->ctx_lock);
+	INIT_LIST_HEAD(&client->ctx_list);
+#ifdef CONFIG_PROC_FS
+	spin_lock_init(&client->objects_lock);
+	INIT_LIST_HEAD(&client->objects_list);
+#endif
+
+	return client;
+}
+
+void __i915_drm_client_free(struct kref *kref)
+{
+	struct i915_drm_client *client =
+		container_of(kref, typeof(*client), kref);
+
+	kfree(client);
+}
+
+#ifdef CONFIG_PROC_FS
+static void
+obj_meminfo(struct drm_i915_gem_object *obj,
+	    struct drm_memory_stats stats[INTEL_REGION_UNKNOWN])
+{
+	const enum intel_region_id id = obj->mm.region ?
+					obj->mm.region->id : INTEL_REGION_SMEM;
+	const u64 sz = obj->base.size;
+
+	if (drm_gem_object_is_shared_for_memory_stats(&obj->base))
+		stats[id].shared += sz;
+	else
+		stats[id].private += sz;
+
+	if (i915_gem_object_has_pages(obj)) {
+		stats[id].resident += sz;
+
+		if (!dma_resv_test_signaled(obj->base.resv,
+					    DMA_RESV_USAGE_BOOKKEEP))
+			stats[id].active += sz;
+		else if (i915_gem_object_is_shrinkable(obj) &&
+			 obj->mm.madv == I915_MADV_DONTNEED)
+			stats[id].purgeable += sz;
+	}
+}
+
+static void show_meminfo(struct drm_printer *p, struct drm_file *file)
+{
+	struct drm_memory_stats stats[INTEL_REGION_UNKNOWN] = {};
+	struct drm_i915_file_private *fpriv = file->driver_priv;
+	struct i915_drm_client *client = fpriv->client;
+	struct drm_i915_private *i915 = fpriv->i915;
+	struct drm_i915_gem_object *obj;
+	struct intel_memory_region *mr;
+	struct list_head __rcu *pos;
+	unsigned int id;
+
+	/* Public objects. */
+	spin_lock(&file->table_lock);
+	idr_for_each_entry(&file->object_idr, obj, id)
+		obj_meminfo(obj, stats);
+	spin_unlock(&file->table_lock);
+
+	/* Internal objects. */
+	rcu_read_lock();
+	list_for_each_rcu(pos, &client->objects_list) {
+		obj = i915_gem_object_get_rcu(list_entry(pos, typeof(*obj),
+							 client_link));
+		if (!obj)
+			continue;
+		obj_meminfo(obj, stats);
+		i915_gem_object_put(obj);
+	}
+	rcu_read_unlock();
+
+	for_each_memory_region(mr, i915, id)
+		drm_print_memory_stats(p,
+				       &stats[id],
+				       DRM_GEM_OBJECT_ACTIVE |
+				       DRM_GEM_OBJECT_RESIDENT |
+				       DRM_GEM_OBJECT_PURGEABLE,
+				       mr->uabi_name);
+}
+
+static const char * const uabi_class_names[] = {
+	[I915_ENGINE_CLASS_RENDER] = "render",
+	[I915_ENGINE_CLASS_COPY] = "copy",
+	[I915_ENGINE_CLASS_VIDEO] = "video",
+	[I915_ENGINE_CLASS_VIDEO_ENHANCE] = "video-enhance",
+	[I915_ENGINE_CLASS_COMPUTE] = "compute",
+};
+
+static u64 busy_add(struct i915_gem_context *ctx, unsigned int class)
+{
+	struct i915_gem_engines_iter it;
+	struct intel_context *ce;
+	u64 total = 0;
+
+	for_each_gem_engine(ce, rcu_dereference(ctx->engines), it) {
+		if (ce->engine->uabi_class != class)
+			continue;
+
+		total += intel_context_get_total_runtime_ns(ce);
+	}
+
+	return total;
+}
+
+static void
+show_client_class(struct drm_printer *p,
+		  struct drm_i915_private *i915,
+		  struct i915_drm_client *client,
+		  unsigned int class)
+{
+	const unsigned int capacity = i915->engine_uabi_class_count[class];
+	u64 total = atomic64_read(&client->past_runtime[class]);
+	struct i915_gem_context *ctx;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(ctx, &client->ctx_list, client_link)
+		total += busy_add(ctx, class);
+	rcu_read_unlock();
+
+	if (capacity)
+		drm_printf(p, "drm-engine-%s:\t%llu ns\n",
+			   uabi_class_names[class], total);
+
+	if (capacity > 1)
+		drm_printf(p, "drm-engine-capacity-%s:\t%u\n",
+			   uabi_class_names[class],
+			   capacity);
+}
+
+void i915_drm_client_fdinfo(struct drm_printer *p, struct drm_file *file)
+{
+	struct drm_i915_file_private *file_priv = file->driver_priv;
+	struct drm_i915_private *i915 = file_priv->i915;
+	unsigned int i;
+
+	/*
+	 * ******************************************************************
+	 * For text output format description please see drm-usage-stats.rst!
+	 * ******************************************************************
+	 */
+
+	show_meminfo(p, file);
+
+	if (GRAPHICS_VER(i915) < 8)
+		return;
+
+	for (i = 0; i < ARRAY_SIZE(uabi_class_names); i++)
+		show_client_class(p, i915, file_priv->client, i);
+}
+
+void i915_drm_client_add_object(struct i915_drm_client *client,
+				struct drm_i915_gem_object *obj)
+{
+	unsigned long flags;
+
+	GEM_WARN_ON(obj->client);
+	GEM_WARN_ON(!list_empty(&obj->client_link));
+
+	spin_lock_irqsave(&client->objects_lock, flags);
+	obj->client = i915_drm_client_get(client);
+	list_add_tail_rcu(&obj->client_link, &client->objects_list);
+	spin_unlock_irqrestore(&client->objects_lock, flags);
+}
+
+void i915_drm_client_remove_object(struct drm_i915_gem_object *obj)
+{
+	struct i915_drm_client *client = fetch_and_zero(&obj->client);
+	unsigned long flags;
+
+	/* Object may not be associated with a client. */
+	if (!client)
+		return;
+
+	spin_lock_irqsave(&client->objects_lock, flags);
+	list_del_rcu(&obj->client_link);
+	spin_unlock_irqrestore(&client->objects_lock, flags);
+
+	i915_drm_client_put(client);
+}
+
+void i915_drm_client_add_context_objects(struct i915_drm_client *client,
+					 struct intel_context *ce)
+{
+	if (ce->state)
+		i915_drm_client_add_object(client, ce->state->obj);
+
+	if (ce->ring != ce->engine->legacy.ring && ce->ring->vma)
+		i915_drm_client_add_object(client, ce->ring->vma->obj);
+}
+#endif