On Fri, Nov 19, 2010 at 4:01 PM, <jglisse@xxxxxxxxxx> wrote:
> From: Jerome Glisse <jglisse@xxxxxxxxxx>
>
> Forbid allocating buffer bigger than visible VRAM or GTT, also
> properly set lpfn field.
>
> Signed-off-by: Jerome Glisse <jglisse@xxxxxxxxxx>
> ---
> drivers/gpu/drm/radeon/radeon_object.c | 36 ++++++++++++++++++++++++++-----
> 1 files changed, 30 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
> index 1d06774..7ce31be 100644
> --- a/drivers/gpu/drm/radeon/radeon_object.c
> +++ b/drivers/gpu/drm/radeon/radeon_object.c
> @@ -64,23 +64,35 @@ bool radeon_ttm_bo_is_radeon_bo(struct ttm_buffer_object *bo)
> return false;
> }
>
> +#define MAX(a,b) (((a)>(b))?(a):(b))
> +
The kernel already has a max() macro.
Alex
> 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)
> + if (domain & RADEON_GEM_DOMAIN_VRAM) {
> + rbo->placement.lpfn = MAX(rbo->placement.lpfn, rbo->rdev->mc.active_vram_size >> PAGE_SHIFT);
> rbo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
> TTM_PL_FLAG_VRAM;
> - if (domain & RADEON_GEM_DOMAIN_GTT)
> + }
> + if (domain & RADEON_GEM_DOMAIN_GTT) {
> + rbo->placement.lpfn = MAX(rbo->placement.lpfn, rbo->rdev->mc.gtt_size >> PAGE_SHIFT);
> rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT;
> - if (domain & RADEON_GEM_DOMAIN_CPU)
> + }
> + if (domain & RADEON_GEM_DOMAIN_CPU) {
> + /* 4G limit for CPU domain */
> + rbo->placement.lpfn = MAX(rbo->placement.lpfn, 0xFFFFFFFF >> PAGE_SHIFT);
> rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
> - if (!c)
> + }
> + if (!c) {
> + /* 4G limit for CPU domain */
> + rbo->placement.lpfn = MAX(rbo->placement.lpfn, 0xFFFFFFFF >> PAGE_SHIFT);
> rbo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
> + }
> rbo->placement.num_placement = c;
> rbo->placement.num_busy_placement = c;
> }
> @@ -91,7 +103,8 @@ 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 = 0;
> int r;
>
> if (unlikely(rdev->mman.bdev.dev_mapping == NULL)) {
> @@ -104,6 +117,17 @@ 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 = rdev->mc.visible_vram_size;
> + if (max_size > rdev->mc.gtt_size) {
> + max_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)
> --
> 1.7.3.2
>
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