[RFC PATCH v3 11/17] drm/i915: Add i915_vma_is_bind_complete()

[Andi Shyti]

From: Niranjana Vishwanathapura <niranjana.vishwanathapura at intel.com>

Add i915_vma_is_bind_complete() to check if the binding of a
of the VM of a specific VMA is complete.

Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura at intel.com>
Signed-off-by: Ramalingam C <ramalingam.c at intel.com>
Signed-off-by: Andi Shyti <andi.shyti at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_vma.c | 28 ++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/i915_vma.h |  1 +
 2 files changed, 29 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index 6ca37ce2b35a8..4b8ae58cd886b 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -406,6 +406,34 @@ int i915_vma_sync(struct i915_vma *vma)
 	return i915_vm_sync(vma->vm);
 }
 
+/**
+ * i915_vma_is_bind_complete() - Checks if the binding of the VM is complete
+ * @vma: virtual address where the virtual memory that is being checked for
+ * binding completion
+ *
+ * Returns true if the binding is complete, otherwise false.
+ */
+bool i915_vma_is_bind_complete(struct i915_vma *vma)
+{
+	/* Ensure vma bind is initiated */
+	if (!i915_vma_is_bound(vma, I915_VMA_BIND_MASK))
+		return false;
+
+	/* Ensure any binding started is complete */
+	if (rcu_access_pointer(vma->active.excl.fence)) {
+		struct dma_fence *fence;
+
+		rcu_read_lock();
+		fence = dma_fence_get_rcu_safe(&vma->active.excl.fence);
+		rcu_read_unlock();
+		if (fence) {
+			dma_fence_put(fence);
+			return false;
+		}
+	}
+	return true;
+}
+
 /**
  * i915_vma_verify_bind_complete() - Check for the vm_bind completion of the vma
  * @vma: vma submitted for vm_bind
diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h
index bf0b5b4abd919..9f8c369c3b466 100644
--- a/drivers/gpu/drm/i915/i915_vma.h
+++ b/drivers/gpu/drm/i915/i915_vma.h
@@ -444,6 +444,7 @@ void i915_vma_make_purgeable(struct i915_vma *vma);
 int i915_vma_wait_for_bind(struct i915_vma *vma);
 int i915_vma_verify_bind_complete(struct i915_vma *vma);
 int i915_vma_sync(struct i915_vma *vma);
+bool i915_vma_is_bind_complete(struct i915_vma *vma);
 
 /**
  * i915_vma_get_current_resource - Get the current resource of the vma
-- 
2.34.1