Re: [PATCH 4/5] drm/i915: Account ring buffer and context state storage

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On 11/07/2023 10:29, Iddamsetty, Aravind wrote:


On 07-07-2023 18:32, Tvrtko Ursulin wrote:
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>

Account ring buffers and logical context space against the owning client
memory usage stats.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
---
  drivers/gpu/drm/i915/gt/intel_context.c | 13 +++++++++++++
  drivers/gpu/drm/i915/i915_drm_client.c  | 10 ++++++++++
  drivers/gpu/drm/i915/i915_drm_client.h  |  8 ++++++++
  3 files changed, 31 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c
index a53b26178f0a..8a395b9201e9 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.c
+++ b/drivers/gpu/drm/i915/gt/intel_context.c
@@ -6,6 +6,7 @@
  #include "gem/i915_gem_context.h"
  #include "gem/i915_gem_pm.h"
+#include "i915_drm_client.h"
  #include "i915_drv.h"
  #include "i915_trace.h"
@@ -50,6 +51,7 @@ intel_context_create(struct intel_engine_cs *engine) int intel_context_alloc_state(struct intel_context *ce)
  {
+	struct i915_gem_context *ctx;
  	int err = 0;
if (mutex_lock_interruptible(&ce->pin_mutex))
@@ -66,6 +68,17 @@ int intel_context_alloc_state(struct intel_context *ce)
  			goto unlock;
set_bit(CONTEXT_ALLOC_BIT, &ce->flags);
+
+		rcu_read_lock();
+		ctx = rcu_dereference(ce->gem_context);
+		if (ctx && !kref_get_unless_zero(&ctx->ref))
+			ctx = NULL;
+		rcu_read_unlock();
+		if (ctx) {
+			if (ctx->client)
+				i915_drm_client_add_context(ctx->client, ce);
+			i915_gem_context_put(ctx);
+		}
  	}
unlock:
diff --git a/drivers/gpu/drm/i915/i915_drm_client.c b/drivers/gpu/drm/i915/i915_drm_client.c
index 2e5e69edc0f9..ffccb6239789 100644
--- a/drivers/gpu/drm/i915/i915_drm_client.c
+++ b/drivers/gpu/drm/i915/i915_drm_client.c
@@ -144,4 +144,14 @@ bool i915_drm_client_remove_object(struct drm_i915_gem_object *obj)
return true;
  }
+
+void i915_drm_client_add_context(struct i915_drm_client *client,
+				 struct intel_context *ce)

do you think we can rename to i915_drm_client_add_context_objects?

I like it, will do, thanks!

Regards,

Tvrtko


+{
+	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
diff --git a/drivers/gpu/drm/i915/i915_drm_client.h b/drivers/gpu/drm/i915/i915_drm_client.h
index 5f58fdf7dcb8..39616b10a51f 100644
--- a/drivers/gpu/drm/i915/i915_drm_client.h
+++ b/drivers/gpu/drm/i915/i915_drm_client.h
@@ -14,6 +14,7 @@
#include "i915_file_private.h"
  #include "gem/i915_gem_object_types.h"
+#include "gt/intel_context_types.h"
#define I915_LAST_UABI_ENGINE_CLASS I915_ENGINE_CLASS_COMPUTE @@ -70,6 +71,8 @@ void i915_drm_client_fdinfo(struct drm_printer *p, struct drm_file *file);
  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);
+void i915_drm_client_add_context(struct i915_drm_client *client,
+				 struct intel_context *ce);
  #else
  static inline void i915_drm_client_add_object(struct i915_drm_client *client,
  					      struct drm_i915_gem_object *obj)
@@ -79,6 +82,11 @@ static inline void i915_drm_client_add_object(struct i915_drm_client *client,
  static inline bool i915_drm_client_remove_object(struct drm_i915_gem_object *obj)
  {
  }
+
+static inline void i915_drm_client_add_context(struct i915_drm_client *client,
+					       struct intel_context *ce)
+{
+}
  #endif
#endif /* !__I915_DRM_CLIENT_H__ */

Reviewed-by: Aravind Iddamsetty <aravind.iddamsetty@xxxxxxxxx>

Thanks,
Aravind.



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