drm/radeon: implement unpin function, v2

Changes since v1:
- Fixup compiler warning in unpin function.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

2 files changed, 15 insertions, 5 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index 00cc52e601fe..e5419b350170 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -128,6 +128,7 @@ struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,
                                                         size_t size,
                                                         struct sg_table *sg);
 int radeon_gem_prime_pin(struct drm_gem_object *obj);
+void radeon_gem_prime_unpin(struct drm_gem_object *obj);
 void *radeon_gem_prime_vmap(struct drm_gem_object *obj);
 void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
 extern long radeon_kms_compat_ioctl(struct file *filp, unsigned int cmd,
@@ -427,6 +428,7 @@ static struct drm_driver kms_driver = {
         .gem_prime_export = drm_gem_prime_export,
         .gem_prime_import = drm_gem_prime_import,
         .gem_prime_pin = radeon_gem_prime_pin,
+        .gem_prime_unpin = radeon_gem_prime_unpin,
         .gem_prime_get_sg_table = radeon_gem_prime_get_sg_table,
         .gem_prime_import_sg_table = radeon_gem_prime_import_sg_table,
         .gem_prime_vmap = radeon_gem_prime_vmap,
diff --git a/drivers/gpu/drm/radeon/radeon_prime.c b/drivers/gpu/drm/radeon/radeon_prime.c
index 4940af7e75e6..65b9eabd5a2f 100644
--- a/drivers/gpu/drm/radeon/radeon_prime.c
+++ b/drivers/gpu/drm/radeon/radeon_prime.c
@@ -88,11 +88,19 @@ int radeon_gem_prime_pin(struct drm_gem_object *obj)
 
         /* pin buffer into GTT */
         ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL);
-        if (ret) {
-                radeon_bo_unreserve(bo);
-                return ret;
-        }
         radeon_bo_unreserve(bo);
+        return ret;
+}
+
+void radeon_gem_prime_unpin(struct drm_gem_object *obj)
+{
+        struct radeon_bo *bo = gem_to_radeon_bo(obj);
+        int ret = 0;
 
-        return 0;
+        ret = radeon_bo_reserve(bo, false);
+        if (unlikely(ret != 0))
+                return;
+
+        radeon_bo_unpin(bo);
+        radeon_bo_unreserve(bo);
 }