linux-kernel - [RFC PATCHv2 0/3] dma_buf import support for vgem

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Date:   Wed, 26 Apr 2017 14:12:27 -0700
From:   Laura Abbott <labbott@...hat.com>
To:     Daniel Vetter <daniel.vetter@...ll.ch>,
        Chris Wilson <chris@...is-wilson.co.uk>,
        Sean Paul <seanpaul@...omium.org>
Cc:     Laura Abbott <labbott@...hat.com>, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org,
        Sumit Semwal <sumit.semwal@...aro.org>
Subject: [RFC PATCHv2 0/3] dma_buf import support for vgem

Hi,

This is v2 of my proposal to add dma_buf import functions for vgem.
Big changes from v1:

- A device is required for dma_buf attach to work. The existing vgem driver
intentionally does not use one as it provides a good way to test the DRM
framework. This approach instead puts a dummy platform device in the existing
drm_device->platformdev field and uses that for attaching.
- Native vgem buffers can still be faulted in a page at a time without
requiring the entire buffer be resident in memory.

I'm still marking this as RFC as I haven't had a chance to finish
a userspace test that can be integrated into igt.

Feedback appreciated as always.

Thanks,
Laura

Laura Abbott (3):
  drm/vgem: Add a dummy platform device
  drm/prime: Introduce drm_gem_prime_import_platform
  drm/vgem: Enable dmabuf import interfaces

 drivers/gpu/drm/drm_prime.c     |  23 +++++-
 drivers/gpu/drm/vgem/vgem_drv.c | 150 +++++++++++++++++++++++++++++++---------
 drivers/gpu/drm/vgem/vgem_drv.h |   2 +
 include/drm/drmP.h              |   5 ++
 4 files changed, 145 insertions(+), 35 deletions(-)

-- 
2.7.4