drm/nouveau: introduce nv_device_is_cpu_coherent()

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Add a function allowing us to know whether a device is CPU-coherent,
i.e. accesses performed by the CPU on GPU-mapped buffers will
be immediately visible on the GPU side and vice-versa.

For now, a device is considered to be coherent if it uses the PCI bus on
a non-ARM architecture.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

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Alexandre Courbot 2014-10-27 18:49:16 +09:00 • committed by Ben Skeggs

parent 5be5a15a43

commit c5d7ddf70a

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drivers/gpu/drm/nouveau/core/include/core/device.h

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