From 11f5a9356946109066b0307fa8461a370c763f2a Mon Sep 17 00:00:00 2001 From: Jerome Glisse Date: Fri, 19 Nov 2010 15:53:47 -0500 Subject: [PATCH] drm/radeon/kms: forbid big bo allocation (fdo 31708) v3 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 Signed-off-by: Jerome Glisse --- 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..a598d00 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 = 0; 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 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) -- 1.7.3.2