>From 8e896486464526add633b6809b6d020ad810315c Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Thu, 28 Aug 2014 10:59:05 -0400 Subject: [PATCH 2/2] drm/radeon: add RADEON_GEM_NO_CPU_ACCESS BO creation flag (v4) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Allows pinning of buffers in the non-CPU visible portion of vram. v2: incorporate Michel's comments. v3: rebase on Michel's patch v4: rebase on Michel's v2 patch Signed-off-by: Alex Deucher Reviewed-by: Michel Dänzer --- drivers/gpu/drm/radeon/radeon_object.c | 1 + include/uapi/drm/radeon_drm.h | 2 ++ 2 files changed, 3 insertions(+) diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c index 24c8772..d3f0a19 100644 --- a/drivers/gpu/drm/radeon/radeon_object.c +++ b/drivers/gpu/drm/radeon/radeon_object.c @@ -309,6 +309,7 @@ int radeon_bo_pin_restricted(struct radeon_bo *bo, u32 domain, u64 max_offset, for (i = 0; i < bo->placement.num_placement; i++) { /* force to pin into visible video ram */ if ((bo->placements[i].flags & TTM_PL_FLAG_VRAM) && + !(bo->flags & RADEON_GEM_NO_CPU_ACCESS) && (!max_offset || max_offset > bo->rdev->mc.visible_vram_size)) bo->placements[i].lpfn = bo->rdev->mc.visible_vram_size >> PAGE_SHIFT; diff --git a/include/uapi/drm/radeon_drm.h b/include/uapi/drm/radeon_drm.h index bf0067b..017f869 100644 --- a/include/uapi/drm/radeon_drm.h +++ b/include/uapi/drm/radeon_drm.h @@ -801,6 +801,8 @@ struct drm_radeon_gem_info { #define RADEON_GEM_GTT_WC (1 << 2) /* BO is expected to be accessed by the CPU */ #define RADEON_GEM_CPU_ACCESS (1 << 3) +/* CPU access is not expected to work for this BO */ +#define RADEON_GEM_NO_CPU_ACCESS (1 << 4) struct drm_radeon_gem_create { uint64_t size; -- 2.1.0