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

Laura Abbott labbott at redhat.com
Wed Apr 26 21:12:27 UTC 2017


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.


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(-)


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