Having the support for vmapping dmabuf's is required to share
dmabufs to drivers that want CPU access. This is the case of
a vivid to virtio-gpu pipeline, where the virtio-gpu driver
exports dmabufs to the video4linux vivid driver.
The first patch adds virtio_gpu_object_kunmap() and calls
it from the TTM object destroy path. This function will be
used to unmap prime objects.
The second patch reworks virtio_gpu_object_kmap(), so it's
balanced with virtio_gpu_object_kunmap.
Finally, the third patch uses virtio_gpu_object_k{map,unmap}
to support prime v{map,unmap}.
Please review!
Ezequiel Garcia (3):
virtio: Add virtio_gpu_object_kunmap()
virtio: Rework virtio_gpu_object_kmap()
virtio: Support prime objects vmap/vunmap
drivers/gpu/drm/virtio/virtgpu_drv.h | 3 ++-
drivers/gpu/drm/virtio/virtgpu_fb.c | 10 ++--------
drivers/gpu/drm/virtio/virtgpu_object.c | 19 +++++++++++--------
drivers/gpu/drm/virtio/virtgpu_prime.c | 11 ++++++++---
4 files changed, 23 insertions(+), 20 deletions(-)
--
2.19.0.rc2
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