On Tue, Aug 05, 2014 at 04:11:04PM +0200, Christian König wrote:
> From: Christian König <christian.koenig@xxxxxxx>
Why do you want that ?
NACK until proper explanation and motive.
>
> Signed-off-by: Christian König <christian.koenig@xxxxxxx>
> ---
> drivers/gpu/drm/radeon/radeon_gem.c | 3 ++-
> drivers/gpu/drm/radeon/radeon_ttm.c | 8 ++++++++
> include/uapi/drm/radeon_drm.h | 3 ++-
> 3 files changed, 12 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c
> index 993ab22..032736b 100644
> --- a/drivers/gpu/drm/radeon/radeon_gem.c
> +++ b/drivers/gpu/drm/radeon/radeon_gem.c
> @@ -290,7 +290,8 @@ int radeon_gem_userptr_ioctl(struct drm_device *dev, void *data,
> return -EACCES;
>
> /* reject unknown flag values */
> - if (args->flags & ~RADEON_GEM_USERPTR_READONLY)
> + if (args->flags & ~(RADEON_GEM_USERPTR_READONLY |
> + RADEON_GEM_USERPTR_ANONONLY))
> return -EINVAL;
>
> /* readonly pages not tested on older hardware */
> diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
> index 0109090..d63e698 100644
> --- a/drivers/gpu/drm/radeon/radeon_ttm.c
> +++ b/drivers/gpu/drm/radeon/radeon_ttm.c
> @@ -542,6 +542,14 @@ static int radeon_ttm_tt_pin_userptr(struct ttm_tt *ttm)
> ttm->num_pages * PAGE_SIZE))
> return -EFAULT;
>
> + if (gtt->userflags & RADEON_GEM_USERPTR_ANONONLY) {
> + unsigned long end = gtt->userptr + ttm->num_pages * PAGE_SIZE;
> + struct vm_area_struct *vma;
> + vma = find_vma(gtt->usermm, gtt->userptr);
> + if (!vma || vma->vm_file || vma->vm_end < end)
> + return -EPERM;
> + }
> +
> do {
> unsigned num_pages = ttm->num_pages - pinned;
> uint64_t userptr = gtt->userptr + pinned * PAGE_SIZE;
> diff --git a/include/uapi/drm/radeon_drm.h b/include/uapi/drm/radeon_drm.h
> index a18ec54..4080ad3 100644
> --- a/include/uapi/drm/radeon_drm.h
> +++ b/include/uapi/drm/radeon_drm.h
> @@ -810,7 +810,8 @@ struct drm_radeon_gem_create {
> uint32_t flags;
> };
>
> -#define RADEON_GEM_USERPTR_READONLY 0x1
> +#define RADEON_GEM_USERPTR_READONLY (1 << 0)
> +#define RADEON_GEM_USERPTR_ANONONLY (1 << 1)
>
> struct drm_radeon_gem_userptr {
> uint64_t addr;
> --
> 1.9.1
>
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