To spare ourselves a long line later, refactor the repeated check of
bind_count vs pin_count to a helper.
v2: Fix up the commentary!
Suggested-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
Cc: Matthew Auld <matthew.william.auld@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_vma.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index 9324d476e0a7..10bf654cd023 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -459,6 +459,18 @@ bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long cache_level)
return true;
}
+static void assert_bind_count(const struct drm_i915_gem_object *obj)
+{
+ /*
+ * Combine the assertion that the object is bound and that we have
+ * pinned its pages. But we should never have bound the object
+ * more than we have pinned its pages. (For complete accuracy, we
+ * assume that no else is pinning the pages, but as a rough assertion
+ * that we will not run into problems later, this will do!)
+ */
+ GEM_BUG_ON(atomic_read(&obj->mm.pages_pin_count) < obj->bind_count);
+}
+
/**
* i915_vma_insert - finds a slot for the vma in its address space
* @vma: the vma
@@ -595,7 +607,7 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
obj->bind_count++;
spin_unlock(&dev_priv->mm.obj_lock);
- GEM_BUG_ON(atomic_read(&obj->mm.pages_pin_count) < obj->bind_count);
+ assert_bind_count(obj);
return 0;
@@ -633,7 +645,7 @@ i915_vma_remove(struct i915_vma *vma)
* reaped by the shrinker.
*/
i915_gem_object_unpin_pages(obj);
- GEM_BUG_ON(atomic_read(&obj->mm.pages_pin_count) < obj->bind_count);
+ assert_bind_count(obj);
}
int __i915_vma_do_pin(struct i915_vma *vma,
--
2.17.1
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