drm/radeon: fall back to GTT if bo creation/validation in VRAM fails.

This fixes a problem where on low VRAM cards we'd run out of space for validation.

[airlied: Tested on my M7, Thinkpad T42, compiz works with no problems.]

Signed-off-by: Michel Dänzer <daenzer@vmware.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 18 insertions, 9 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
index d5b9373ce06c..0afd1e62347d 100644
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -110,6 +110,7 @@ int radeon_bo_create(struct radeon_device *rdev, struct drm_gem_object *gobj,
         bo->surface_reg = -1;
         INIT_LIST_HEAD(&bo->list);
 
+retry:
         radeon_ttm_placement_from_domain(bo, domain);
         /* Kernel allocation are uninterruptible */
         mutex_lock(&rdev->vram_mutex);
@@ -118,10 +119,15 @@ int radeon_bo_create(struct radeon_device *rdev, struct drm_gem_object *gobj,
                         &radeon_ttm_bo_destroy);
         mutex_unlock(&rdev->vram_mutex);
         if (unlikely(r != 0)) {
-                if (r != -ERESTARTSYS)
+                if (r != -ERESTARTSYS) {
+                        if (domain == RADEON_GEM_DOMAIN_VRAM) {
+                                domain |= RADEON_GEM_DOMAIN_GTT;
+                                goto retry;
+                        }
                         dev_err(rdev->dev,
                                 "object_init failed for (%lu, 0x%08X)\n",
                                 size, domain);
+                }
                 return r;
         }
         *bo_ptr = bo;
@@ -321,6 +327,7 @@ int radeon_bo_list_validate(struct list_head *head)
 {
         struct radeon_bo_list *lobj;
         struct radeon_bo *bo;
+        u32 domain;
         int r;
 
         list_for_each_entry(lobj, head, list) {
@@ -333,17 +340,19 @@ int radeon_bo_list_validate(struct list_head *head)
         list_for_each_entry(lobj, head, list) {
                 bo = lobj->bo;
                 if (!bo->pin_count) {
-                        if (lobj->wdomain) {
-                                radeon_ttm_placement_from_domain(bo,
-                                                                lobj->wdomain);
-                        } else {
-                                radeon_ttm_placement_from_domain(bo,
-                                                                lobj->rdomain);
-                        }
+                        domain = lobj->wdomain ? lobj->wdomain : lobj->rdomain;
+                        
+                retry:
+                        radeon_ttm_placement_from_domain(bo, domain);
                         r = ttm_bo_validate(&bo->tbo, &bo->placement,
                                                 true, false, false);
-                        if (unlikely(r))
+                        if (unlikely(r)) {
+                                if (r != -ERESTARTSYS && domain == RADEON_GEM_DOMAIN_VRAM) {
+                                        domain |= RADEON_GEM_DOMAIN_GTT;
+                                        goto retry;
+                                }
                                 return r;
+                        }
                 }
                 lobj->gpu_offset = radeon_bo_gpu_offset(bo);
                 lobj->tiling_flags = bo->tiling_flags;