From: Tiago Vignatti <tiago.vignatti@intel.com>
To: dri-devel@lists.freedesktop.org
Cc: daniel.vetter@ffwll.ch, intel-gfx@lists.freedesktop.org,
daniel.thompson@linaro.org
Subject: [PATCH v3] mmap on the dma-buf directly
Date: Tue, 11 Aug 2015 17:59:19 -0300 [thread overview]
Message-ID: <1439326768-5611-1-git-send-email-tiago.vignatti@intel.com> (raw)
Hi,
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").
In v2, I've added a patch that Daniel kindly drafted to allow the
unpriviledged process flush through a prime fd. In v3, I've fixed a few
concerns and then added end_cpu_access to i915.
To validate all this I'm using igt, and sending the tests for review now.
Please take a look.
Tiago
Daniel Thompson (1):
drm: prime: Honour O_RDWR during prime-handle-to-fd
Daniel Vetter (1):
dma-buf: Add ioctls to allow userspace to flush
Tiago Vignatti (2):
drm/i915: Implement end_cpu_access
drm/i915: Use CPU mapping for userspace dma-buf mmap()
drivers/dma-buf/dma-buf.c | 47 ++++++++++++++++++++++++++++++++++
drivers/gpu/drm/drm_prime.c | 10 +++-----
drivers/gpu/drm/i915/i915_gem_dmabuf.c | 28 +++++++++++++++++++-
include/uapi/drm/drm.h | 1 +
include/uapi/linux/dma-buf.h | 39 ++++++++++++++++++++++++++++
5 files changed, 117 insertions(+), 8 deletions(-)
create mode 100644 include/uapi/linux/dma-buf.h
--
2.1.0
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next reply other threads:[~2015-08-11 20:59 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-11 20:59 Tiago Vignatti [this message]
2015-08-11 20:59 ` [PATCH 1/4] drm: prime: Honour O_RDWR during prime-handle-to-fd Tiago Vignatti
2015-08-11 20:59 ` [PATCH 2/4] dma-buf: Add ioctls to allow userspace to flush Tiago Vignatti
2015-08-12 14:20 ` Sumit Semwal
2015-08-11 20:59 ` [PATCH 3/4] drm/i915: Implement end_cpu_access Tiago Vignatti
2015-08-11 20:59 ` [PATCH 4/4] drm/i915: Use CPU mapping for userspace dma-buf mmap() Tiago Vignatti
2015-08-11 22:20 ` Chris Wilson
2015-08-12 13:28 ` Daniel Vetter
2015-08-11 20:59 ` [PATCH i-g-t 1/5] prime_mmap: Add new test for calling mmap() on dma-buf fds Tiago Vignatti
2015-08-11 20:59 ` [PATCH i-g-t 2/5] prime_mmap: Fix a few misc stuff Tiago Vignatti
2015-08-11 20:59 ` [PATCH i-g-t 3/5] prime_mmap: Add basic tests to write in a bo using CPU Tiago Vignatti
2015-08-11 20:59 ` [PATCH i-g-t 4/5] tests: Add kms_mmap_write_crc for cache coherency tests Tiago Vignatti
2015-08-11 20:59 ` [PATCH i-g-t 5/5] tests/kms_mmap_write_crc: Demonstrate the need for end_cpu_access Tiago Vignatti
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