[Intel-gfx] [PATCH 02/16] drm/i915: Pin fence for iomap

[Chris Wilson]

Acquire the fence register for the iomap in i915_vma_pin_iomap() on
behalf of the caller.

We probably want for the caller to specify whether the fence should be
pinned for their usage, but at the moment all callers do want the
associated fence, or none, so take it on their behalf.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_vma.c                  | 19 +++++++++++++++++++
 drivers/gpu/drm/i915/i915_vma.h                  |  7 +------
 drivers/gpu/drm/i915/selftests/i915_gem_object.c |  8 --------
 3 files changed, 20 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index 958be0a95960..d7330d3eeab6 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -278,6 +278,7 @@ int i915_vma_bind(struct i915_vma *vma, enum i915_cache_level cache_level,
 void __iomem *i915_vma_pin_iomap(struct i915_vma *vma)
 {
 	void __iomem *ptr;
+	int ret;
 
 	/* Access through the GTT requires the device to be awake. */
 	assert_rpm_wakelock_held(vma->vm->i915);
@@ -301,9 +302,27 @@ void __iomem *i915_vma_pin_iomap(struct i915_vma *vma)
 	}
 
 	__i915_vma_pin(vma);
+
+	ret = i915_vma_get_fence(vma);
+	if (ret) {
+		__i915_vma_unpin(vma);
+		return IO_ERR_PTR(ret);
+	}
+	i915_vma_pin_fence(vma);
+
 	return ptr;
 }
 
+void i915_vma_unpin_iomap(struct i915_vma *vma)
+{
+	lockdep_assert_held(&vma->obj->base.dev->struct_mutex);
+
+	GEM_BUG_ON(vma->iomap == NULL);
+
+	i915_vma_unpin_fence(vma);
+	i915_vma_unpin(vma);
+}
+
 void i915_vma_unpin_and_release(struct i915_vma **p_vma)
 {
 	struct i915_vma *vma;
diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h
index 20cf272c97b1..1d67f52ee836 100644
--- a/drivers/gpu/drm/i915/i915_vma.h
+++ b/drivers/gpu/drm/i915/i915_vma.h
@@ -319,12 +319,7 @@ void __iomem *i915_vma_pin_iomap(struct i915_vma *vma);
  * Callers must hold the struct_mutex. This function is only valid to be
  * called on a VMA previously iomapped by the caller with i915_vma_pin_iomap().
  */
-static inline void i915_vma_unpin_iomap(struct i915_vma *vma)
-{
-	lockdep_assert_held(&vma->obj->base.dev->struct_mutex);
-	GEM_BUG_ON(vma->iomap == NULL);
-	i915_vma_unpin(vma);
-}
+void i915_vma_unpin_iomap(struct i915_vma *vma);
 
 static inline struct page *i915_vma_first_page(struct i915_vma *vma)
 {
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_object.c b/drivers/gpu/drm/i915/selftests/i915_gem_object.c
index 8f011c447e41..1b8774a42e48 100644
--- a/drivers/gpu/drm/i915/selftests/i915_gem_object.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_object.c
@@ -251,14 +251,6 @@ static int check_partial_mapping(struct drm_i915_gem_object *obj,
 			return PTR_ERR(io);
 		}
 
-		err = i915_vma_get_fence(vma);
-		if (err) {
-			pr_err("Failed to get fence for partial view: offset=%lu\n",
-			       page);
-			i915_vma_unpin_iomap(vma);
-			return err;
-		}
-
 		iowrite32(page, io + n * PAGE_SIZE/sizeof(*io));
 		i915_vma_unpin_iomap(vma);
 
-- 
2.13.3