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drm/msm: honor GPU_READONLY flag 

Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Rob Clark 2019-01-09 14:25:05 -05:00
parent b8be1cd9b0
commit 388a515f6a
3 changed files with 11 additions and 5 deletions
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3
drivers/gpu/drm/msm/msm_drv.h
View File

@ -250,7 +250,8 @@ void msm_gem_purge_vma(struct msm_gem_address_space *aspace,
void msm_gem_unmap_vma(struct msm_gem_address_space *aspace,
struct msm_gem_vma *vma);
int msm_gem_map_vma(struct msm_gem_address_space *aspace,
struct msm_gem_vma *vma, struct sg_table *sgt, int npages);
struct msm_gem_vma *vma, int prot,
struct sg_table *sgt, int npages);
void msm_gem_close_vma(struct msm_gem_address_space *aspace,
struct msm_gem_vma *vma);

8
drivers/gpu/drm/msm/msm_gem.c
View File

@ -391,6 +391,10 @@ static int msm_gem_pin_iova(struct drm_gem_object *obj,
struct msm_gem_object *msm_obj = to_msm_bo(obj);
struct msm_gem_vma *vma;
struct page **pages;
int prot = IOMMU_READ;
if (!(msm_obj->flags & MSM_BO_GPU_READONLY))
prot |= IOMMU_WRITE;
WARN_ON(!mutex_is_locked(&msm_obj->lock));
@ -405,8 +409,8 @@ static int msm_gem_pin_iova(struct drm_gem_object *obj,
if (IS_ERR(pages))
return PTR_ERR(pages);
return msm_gem_map_vma(aspace, vma, msm_obj->sgt,
obj->size >> PAGE_SHIFT);
return msm_gem_map_vma(aspace, vma, prot,
msm_obj->sgt, obj->size >> PAGE_SHIFT);
}
/* get iova and pin it. Should have a matching put */

5
drivers/gpu/drm/msm/msm_gem_vma.c
View File

@ -68,7 +68,8 @@ void msm_gem_unmap_vma(struct msm_gem_address_space *aspace,
int
msm_gem_map_vma(struct msm_gem_address_space *aspace,
struct msm_gem_vma *vma, struct sg_table *sgt, int npages)
struct msm_gem_vma *vma, int prot,
struct sg_table *sgt, int npages)
{
unsigned size = npages << PAGE_SHIFT;
int ret = 0;
@ -86,7 +87,7 @@ msm_gem_map_vma(struct msm_gem_address_space *aspace,
if (aspace->mmu)
ret = aspace->mmu->funcs->map(aspace->mmu, vma->iova, sgt,
size, IOMMU_READ | IOMMU_WRITE);
size, prot);
if (ret)
vma->mapped = false;