[PATCH 0/2] mmap on the dma-buf directly

[Tiago Vignatti]

Hi,

I've tested these two patches (in drm-intel-nightly, but also in CrOS kernel
v3.14) and they seem just enough for what we want to do: the idea is to create
a GEM bo in one process and pass the prime handle of the it to another
process, which in turn uses the handle only to map and write. This could be
useful for Chrome OS  architecture, where the Web content ("unpriviledged
process") maps and CPU-draws a buffer, which was previously allocated in the
GPU process ("priviledged process").

I'm using a modified igt mostly to test these things. PTAL here:
https://github.com/tiagovignatti/intel-gpu-tools/commits/prime_mmap

Thank you,

Tiago


Daniel Thompson (1):
  drm: prime: Honour O_RDWR during prime-handle-to-fd

Tiago Vignatti (1):
  drm/i915: Use CPU mapping for userspace dma-buf mmap()

 drivers/gpu/drm/drm_prime.c            | 10 +++-------
 drivers/gpu/drm/i915/i915_gem_dmabuf.c | 21 ++++++++++++++++++++-
 include/uapi/drm/drm.h                 |  1 +
 3 files changed, 24 insertions(+), 8 deletions(-)

-- 
2.1.0