drm/radeon/kms: forbid big bo allocation (fdo 31708) v3

[mv-sheeva.git] / drivers / gpu / drm / radeon / radeon_object.c

diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
index 8eb183466015326f7ca93b2647e85a610fe91f6f..a598d0049aa5938900a84c656c3cd9677010ee20 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -69,7 +69,7 @@ void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
        u32 c = 0;
 
        rbo->placement.fpfn = 0;
-       rbo->placement.lpfn = rbo->rdev->mc.active_vram_size >> PAGE_SHIFT;
+       rbo->placement.lpfn = 0;
        rbo->placement.placement = rbo->placements;
        rbo->placement.busy_placement = rbo->placements;
        if (domain & RADEON_GEM_DOMAIN_VRAM)
@@ -86,11 +86,13 @@ void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain)
 }
 
 int radeon_bo_create(struct radeon_device *rdev, struct drm_gem_object *gobj,
-                       unsigned long size, bool kernel, u32 domain,
-                       struct radeon_bo **bo_ptr)
+                    unsigned long size, int byte_align, bool kernel, u32 domain,
+                    struct radeon_bo **bo_ptr)
 {
        struct radeon_bo *bo;
        enum ttm_bo_type type;
+       unsigned long page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
+       unsigned long max_size = 0;
        int r;
 
        if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
@@ -103,6 +105,14 @@ int radeon_bo_create(struct radeon_device *rdev, struct drm_gem_object *gobj,
        }
        *bo_ptr = NULL;
 
+       /* maximun bo size is the minimun btw visible vram and gtt size */
+       max_size = min(rdev->mc.visible_vram_size, rdev->mc.gtt_size);
+       if ((page_align << PAGE_SHIFT) >= max_size) {
+               printk(KERN_WARNING "%s:%d alloc size %ldM bigger than %ldMb limit\n",
+                       __func__, __LINE__, page_align  >> (20 - PAGE_SHIFT), max_size >> 20);
+               return -ENOMEM;
+       }
+
 retry:
        bo = kzalloc(sizeof(struct radeon_bo), GFP_KERNEL);
        if (bo == NULL)
@@ -115,7 +125,7 @@ retry:
        /* Kernel allocation are uninterruptible */
        mutex_lock(&rdev->vram_mutex);
        r = ttm_bo_init(&rdev->mman.bdev, &bo->tbo, size, type,
-                       &bo->placement, 0, 0, !kernel, NULL, size,
+                       &bo->placement, page_align, 0, !kernel, NULL, size,
                        &radeon_ttm_bo_destroy);
        mutex_unlock(&rdev->vram_mutex);
        if (unlikely(r != 0)) {