On Wed, Feb 26, 2014 at 04:41:41PM +0000, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
>
> Allow userptr objects to be created and used via libdrm_intel.
>
> At the moment tiling and mapping to GTT aperture is not supported
> due hardware limitations across different generations and uncertainty
> about its usefulness.
>
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
> ---
> include/drm/i915_drm.h | 16 +++++
> intel/intel_bufmgr.c | 13 ++++
> intel/intel_bufmgr.h | 5 ++
> intel/intel_bufmgr_gem.c | 154 +++++++++++++++++++++++++++++++++++++++++++++-
> intel/intel_bufmgr_priv.h | 12 +++-
> 5 files changed, 198 insertions(+), 2 deletions(-)
>
> diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h
> index 2f4eb8c..d32ef99 100644
> --- a/include/drm/i915_drm.h
> +++ b/include/drm/i915_drm.h
> @@ -223,6 +223,7 @@ typedef struct _drm_i915_sarea {
> #define DRM_I915_GEM_GET_CACHING 0x30
> #define DRM_I915_REG_READ 0x31
> #define DRM_I915_GET_RESET_STATS 0x32
> +#define DRM_I915_GEM_USERPTR 0x34
>
> #define DRM_IOCTL_I915_INIT DRM_IOW( DRM_COMMAND_BASE + DRM_I915_INIT, drm_i915_init_t)
> #define DRM_IOCTL_I915_FLUSH DRM_IO ( DRM_COMMAND_BASE + DRM_I915_FLUSH)
> @@ -273,6 +274,7 @@ typedef struct _drm_i915_sarea {
> #define DRM_IOCTL_I915_GEM_CONTEXT_DESTROY DRM_IOW (DRM_COMMAND_BASE + DRM_I915_GEM_CONTEXT_DESTROY, struct drm_i915_gem_context_destroy)
> #define DRM_IOCTL_I915_REG_READ DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_REG_READ, struct drm_i915_reg_read)
> #define DRM_IOCTL_I915_GET_RESET_STATS DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GET_RESET_STATS, struct drm_i915_reset_stats)
> +#define DRM_IOCTL_I915_GEM_USERPTR DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_USERPTR, struct drm_i915_gem_userptr)
>
> /* Allow drivers to submit batchbuffers directly to hardware, relying
> * on the security mechanisms provided by hardware.
> @@ -498,6 +500,20 @@ struct drm_i915_gem_mmap_gtt {
> __u64 offset;
> };
>
> +struct drm_i915_gem_userptr {
> + __u64 user_ptr;
> + __u64 user_size;
> + __u32 flags;
> +#define I915_USERPTR_READ_ONLY 0x1
> +#define I915_USERPTR_UNSYNCHRONIZED 0x80000000
> + /**
> + * Returned handle for the object.
> + *
> + * Object handles are nonzero.
> + */
> + __u32 handle;
> +};
> +
Oh yeah. I want a ctx_id here as well. Chris, any objection to adding
this?
[snip]
--
Ben Widawsky, Intel Open Source Technology Center
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