From: Jerome Glisse <jgli...@redhat.com>
Forbid allocating buffer bigger than visible VRAM or GTT, also
properly set lpfn field.
v2 - use max macro
- silence warning
v3 - don't explicitly set range limit
- use min macro
v4 - use max btw GTT & VRAM size
Cc: stable <sta...@kernel.org>
Signed-off-by: Jerome Glisse <jgli...@redhat.com>
---
drivers/gpu/drm/radeon/radeon_object.c | 13 +++++++++++--
1 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_object.c
b/drivers/gpu/drm/radeon/radeon_object.c
index 1d06774..2011e00 100644
--- 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)
@@ -91,7 +91,8 @@ int radeon_bo_create(struct radeon_device *rdev, struct
drm_gem_object *gobj,
{
struct radeon_bo *bo;
enum ttm_bo_type type;
- int page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
+ unsigned long page_align = roundup(byte_align, PAGE_SIZE) >> PAGE_SHIFT;
+ unsigned long max_size;
int r;
if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
@@ -104,6 +105,14 @@ int radeon_bo_create(struct radeon_device *rdev, struct
drm_gem_object *gobj,
}
*bo_ptr = NULL;
+ /* maximun bo size is the max btw visible vram and gtt size */
+ max_size = max(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)
--
1.7.1
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