[PATCH 2/6] drm/i915: Add ability for tracking buffer objects per client
Tvrtko Ursulin
tvrtko.ursulin at linux.intel.com
Tue Jun 27 12:20:34 UTC 2023
From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
In order to show per client memory usage lets add some infrastructure
which enables tracking buffer objects owned by clients.
We add a per client list protected by a new per client lock and to support
delayed destruction (post client exit) we make tracked objects hold
references to the owning client.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
drivers/gpu/drm/i915/gem/i915_gem_object.c | 12 ++++++
.../gpu/drm/i915/gem/i915_gem_object_types.h | 12 ++++++
drivers/gpu/drm/i915/i915_drm_client.c | 38 ++++++++++++++++++-
drivers/gpu/drm/i915/i915_drm_client.h | 36 +++++++++++++++++-
drivers/gpu/drm/i915/i915_gem.c | 2 +-
5 files changed, 97 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c
index 318efcc6e884..0004d5fa7cc2 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c
@@ -105,6 +105,10 @@ void i915_gem_object_init(struct drm_i915_gem_object *obj,
INIT_LIST_HEAD(&obj->mm.link);
+#ifdef CONFIG_PROC_FS
+ INIT_LIST_HEAD(&obj->client_link);
+#endif
+
INIT_LIST_HEAD(&obj->lut_list);
spin_lock_init(&obj->lut_lock);
@@ -401,9 +405,17 @@ static void __i915_gem_free_objects(struct drm_i915_private *i915,
struct llist_node *freed)
{
struct drm_i915_gem_object *obj, *on;
+ bool removed = false;
might_sleep();
+ llist_for_each_entry_safe(obj, on, freed, freed)
+ removed |= i915_drm_client_remove_object(obj);
+
+ /* Ensure procfs readers will not be peeking into the object no more. */
+ if (removed)
+ synchronize_rcu();
+
llist_for_each_entry_safe(obj, on, freed, freed) {
if (obj->ops->delayed_free) {
obj->ops->delayed_free(obj);
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
index e72c57716bee..8de2b91b3edf 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
@@ -300,6 +300,18 @@ struct drm_i915_gem_object {
*/
struct i915_address_space *shares_resv_from;
+#ifdef CONFIG_PROC_FS
+ /**
+ * @client: @i915_drm_client which created the object
+ */
+ struct i915_drm_client *client;
+
+ /**
+ * @client_link: Link into @i915_drm_client.objects_list
+ */
+ struct list_head client_link;
+#endif
+
union {
struct rcu_head rcu;
struct llist_node freed;
diff --git a/drivers/gpu/drm/i915/i915_drm_client.c b/drivers/gpu/drm/i915/i915_drm_client.c
index 2a44b3876cb5..b0f947cbc6e9 100644
--- a/drivers/gpu/drm/i915/i915_drm_client.c
+++ b/drivers/gpu/drm/i915/i915_drm_client.c
@@ -17,7 +17,8 @@
#include "i915_gem.h"
#include "i915_utils.h"
-struct i915_drm_client *i915_drm_client_alloc(void)
+struct i915_drm_client *
+i915_drm_client_alloc(struct drm_i915_file_private *fpriv)
{
struct i915_drm_client *client;
@@ -28,6 +29,12 @@ struct i915_drm_client *i915_drm_client_alloc(void)
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);
+
+ client->fpriv = fpriv;
+#endif
return client;
}
@@ -108,4 +115,33 @@ void i915_drm_client_fdinfo(struct drm_printer *p, struct drm_file *file)
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)
+{
+ GEM_WARN_ON(obj->client);
+ GEM_WARN_ON(!list_empty(&obj->client_link));
+
+ spin_lock(&client->objects_lock);
+ obj->client = i915_drm_client_get(client);
+ list_add_tail_rcu(&obj->client_link, &client->objects_list);
+ spin_unlock(&client->objects_lock);
+}
+
+bool i915_drm_client_remove_object(struct drm_i915_gem_object *obj)
+{
+ struct i915_drm_client *client = fetch_and_zero(&obj->client);
+
+ /* Object may not be associated with a client. */
+ if (!client)
+ return false;
+
+ spin_lock(&client->objects_lock);
+ list_del_rcu(&obj->client_link);
+ spin_unlock(&client->objects_lock);
+
+ i915_drm_client_put(client);
+
+ return true;
+}
#endif
diff --git a/drivers/gpu/drm/i915/i915_drm_client.h b/drivers/gpu/drm/i915/i915_drm_client.h
index 67816c912bca..10abf9f18d95 100644
--- a/drivers/gpu/drm/i915/i915_drm_client.h
+++ b/drivers/gpu/drm/i915/i915_drm_client.h
@@ -12,6 +12,9 @@
#include <uapi/drm/i915_drm.h>
+#include "i915_file_private.h"
+#include "gem/i915_gem_object_types.h"
+
#define I915_LAST_UABI_ENGINE_CLASS I915_ENGINE_CLASS_COMPUTE
struct drm_file;
@@ -25,6 +28,22 @@ struct i915_drm_client {
spinlock_t ctx_lock; /* For add/remove from ctx_list. */
struct list_head ctx_list; /* List of contexts belonging to client. */
+#ifdef CONFIG_PROC_FS
+ struct drm_i915_file_private *fpriv;
+
+ /**
+ * @objects_lock: lock protecting @objects_list
+ */
+ spinlock_t objects_lock;
+
+ /**
+ * @objects_list: list of objects created by this client
+ *
+ * Protected by @objects_lock.
+ */
+ struct list_head objects_list;
+#endif
+
/**
* @past_runtime: Accumulation of pphwsp runtimes from closed contexts.
*/
@@ -45,8 +64,23 @@ static inline void i915_drm_client_put(struct i915_drm_client *client)
kref_put(&client->kref, __i915_drm_client_free);
}
-struct i915_drm_client *i915_drm_client_alloc(void);
+struct i915_drm_client *i915_drm_client_alloc(struct drm_i915_file_private *fpriv);
void i915_drm_client_fdinfo(struct drm_printer *p, struct drm_file *file);
+#ifdef CONFIG_PROC_FS
+void i915_drm_client_add_object(struct i915_drm_client *client,
+ struct drm_i915_gem_object *obj);
+bool i915_drm_client_remove_object(struct drm_i915_gem_object *obj);
+#else
+static inline void i915_drm_client_add_object(struct i915_drm_client *client,
+ struct drm_i915_gem_object *obj)
+{
+}
+
+static inline bool i915_drm_client_remove_object(struct drm_i915_gem_object *obj)
+{
+}
+#endif
+
#endif /* !__I915_DRM_CLIENT_H__ */
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 1f65bb33dd21..7ae42f746cc2 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1325,7 +1325,7 @@ int i915_gem_open(struct drm_i915_private *i915, struct drm_file *file)
if (!file_priv)
goto err_alloc;
- client = i915_drm_client_alloc();
+ client = i915_drm_client_alloc(file_priv);
if (!client)
goto err_client;
--
2.39.2
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