[Intel-gfx] [RFC libdrm] intel: Add support for softpin

[Song, Ruiling]

> -----Original Message-----
> From: Intel-gfx [mailto:intel-gfx-bounces at lists.freedesktop.org] On Behalf
> Of Micha? Winiarski
> Sent: Wednesday, September 9, 2015 10:07 PM
> To: intel-gfx at lists.freedesktop.org
> Cc: Ben Widawsky <ben at bwidawsk.net>; dri-devel at lists.freedesktop.org;
> mesa-dev at lists.freedesktop.org
> Subject: [Intel-gfx] [RFC libdrm] intel: Add support for softpin
> 
> Softpin allows userspace to take greater control of GPU virtual address
> space and eliminates the need of relocations. It can also be used to
> mirror addresses between GPU and CPU (shared virtual memory).
> Calls to drm_intel_bo_emit_reloc are still required to build the list of
> drm_i915_gem_exec_objects at exec time, but no entries in relocs are
> created. Self-relocs don't make any sense for softpinned objects and can
> indicate a programming errors, thus are forbidden. Softpinned objects
> are marked by asterisk in debug dumps.
> 
> Cc: Thomas Daniel <thomas.daniel at intel.com>
> Cc: Kristian Høgsberg <krh at bitplanet.net>
> Cc: Zou Nanhai <nanhai.zou at intel.com>
> Cc: Michel Thierry <michel.thierry at intel.com>
> Cc: Ben Widawsky <ben at bwidawsk.net>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Signed-off-by: Michał Winiarski <michal.winiarski at intel.com>
> ---
>  include/drm/i915_drm.h    |   4 +-
>  intel/intel_bufmgr.c      |   9 +++
>  intel/intel_bufmgr.h      |   1 +
>  intel/intel_bufmgr_gem.c  | 176
> ++++++++++++++++++++++++++++++++++++++++------
>  intel/intel_bufmgr_priv.h |   7 ++
>  5 files changed, 173 insertions(+), 24 deletions(-)

Will anybody help to push the patch to libdrm? Beignet highly depend on this to 
implement ocl2.0 svm.

Thanks!
Ruiling