sna: Mark redirect proxies with a unique id

This helps gen3 in particular as it uses the unique_id field of a bo to
detect changes in render target.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

4 files changed, 6 insertions, 1 deletions

diff --git a/src/sna/gen3_render.c b/src/sna/gen3_render.c
index 3313e3e2..28b950fe 100644
--- a/src/sna/gen3_render.c
+++ b/src/sna/gen3_render.c
@@ -3215,6 +3215,8 @@ gen3_composite_set_target(struct sna *sna,
 	if (op->dst.bo == NULL)
 		return false;
 
+	assert(op->dst.bo->unique_id);
+
 	/* For single-stream mode there should be no minimum alignment
 	 * required, except that the width must be at least 2 elements.
 	 */
diff --git a/src/sna/kgem.c b/src/sna/kgem.c
index 20326798..8d3e9df7 100644
--- a/src/sna/kgem.c
+++ b/src/sna/kgem.c
@@ -1198,7 +1198,7 @@ void kgem_init(struct kgem *kgem, int fd, struct pci_device *dev, unsigned gen)
 }
 
 /* XXX hopefully a good approximation */
-static uint32_t kgem_get_unique_id(struct kgem *kgem)
+uint32_t kgem_get_unique_id(struct kgem *kgem)
 {
 	uint32_t id;
 	id = ++kgem->unique_id;
diff --git a/src/sna/kgem.h b/src/sna/kgem.h
index d6940afe..82f9b522 100644
--- a/src/sna/kgem.h
+++ b/src/sna/kgem.h
@@ -249,6 +249,8 @@ unsigned kgem_can_create_2d(struct kgem *kgem, int width, int height, int depth)
 #define KGEM_CAN_CREATE_LARGE	0x4
 #define KGEM_CAN_CREATE_GTT	0x8
 
+uint32_t kgem_get_unique_id(struct kgem *kgem);
+
 struct kgem_bo *
 kgem_replace_bo(struct kgem *kgem,
 		struct kgem_bo *src,
diff --git a/src/sna/sna_render.c b/src/sna/sna_render.c
index 4bfd9391..a9297508 100644
--- a/src/sna/sna_render.c
+++ b/src/sna/sna_render.c
@@ -1970,6 +1970,7 @@ sna_render_composite_redirect(struct sna *sna,
 			}
 
 			assert(op->dst.bo != t->real_bo);
+			op->dst.bo->unique_id = kgem_unique_id(&sna->kgem);
 			op->dst.bo->pitch = t->real_bo->pitch;
 
 			op->dst.x -= box.x1;