[Intel-gfx] [PATCH v8 13/22] drm/i915/vm_bind: Update i915_vma_verify_bind_complete()

From: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
Cc: paulo.r.zanoni@intel.com, jani.nikula@intel.com,
	thomas.hellstrom@intel.com, matthew.auld@intel.com,
	daniel.vetter@intel.com, christian.koenig@amd.com
Subject: [Intel-gfx] [PATCH v8 13/22] drm/i915/vm_bind: Update i915_vma_verify_bind_complete()
Date: Mon, 28 Nov 2022 23:26:26 -0800	[thread overview]
Message-ID: <20221129072635.847-14-niranjana.vishwanathapura@intel.com> (raw)
In-Reply-To: <20221129072635.847-1-niranjana.vishwanathapura@intel.com>

Ensure i915_vma_verify_bind_complete() handles case where bind
is not initiated. Also make it non static, add documentation
and move it out of CONFIG_DRM_I915_DEBUG_GEM.

v2: Fix fence leak

Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_vma.c | 22 ++++++++++++++++------
 drivers/gpu/drm/i915/i915_vma.h |  1 +
 2 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index c29e22b1cfea..e382c8a6cac4 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -441,12 +441,25 @@ int i915_vma_sync(struct i915_vma *vma)
 	return i915_vm_sync(vma->vm);
 }
 
-#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)
-static int i915_vma_verify_bind_complete(struct i915_vma *vma)
+/**
+ * i915_vma_verify_bind_complete() - Check for the bind completion of the vma
+ * @vma: vma to check for bind completion
+ *
+ * As the fence reference is obtained under RCU, no locking is required by
+ * the caller.
+ *
+ * Returns: 0 if the vma bind is completed. Error code otherwise.
+ */
+int i915_vma_verify_bind_complete(struct i915_vma *vma)
 {
-	struct dma_fence *fence = i915_active_fence_get(&vma->active.excl);
+	struct dma_fence *fence;
 	int err;
 
+	/* Ensure vma bind is initiated */
+	if (!i915_vma_is_bound(vma, I915_VMA_BIND_MASK))
+		return -EINVAL;
+
+	fence = i915_active_fence_get(&vma->active.excl);
 	if (!fence)
 		return 0;
 
@@ -459,9 +472,6 @@ static int i915_vma_verify_bind_complete(struct i915_vma *vma)
 
 	return err;
 }
-#else
-#define i915_vma_verify_bind_complete(_vma) 0
-#endif
 
 I915_SELFTEST_EXPORT void
 i915_vma_resource_init_from_vma(struct i915_vma_resource *vma_res,
diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h
index 25e4aa69cd89..9a411a79badd 100644
--- a/drivers/gpu/drm/i915/i915_vma.h
+++ b/drivers/gpu/drm/i915/i915_vma.h
@@ -441,6 +441,7 @@ void i915_vma_make_purgeable(struct i915_vma *vma);
 
 int i915_vma_wait_for_bind(struct i915_vma *vma);
 int i915_vma_sync(struct i915_vma *vma);
+int i915_vma_verify_bind_complete(struct i915_vma *vma);
 
 /**
  * i915_vma_get_current_resource - Get the current resource of the vma
-- 
2.21.0.rc0.32.g243a4c7e27

