Konsta Holtta 3e431e26c5 gpu: nvgpu: add PRAMIN support for mem accessors ...

To support vidmem, implement a way to access buffers via the PRAMIN
window instead of just kernel-mapped sysmem buffers for iGPU as of now.
Depending on the buffer aperture, choose between the two access types in
the buffer memory accessor functions.

vmap()/vunmap() pairs are no-ops for buffers that can't be cpu-mapped.

Two uses of DMA_ATTR_READ_ONLY are removed in the ucode loading path to
support writing to them too via the indirection in addition to cpu.

JIRA DNVGPU-23

Change-Id: I282dba6741c6b8224bc12e69c1fb3936bde7e6ed
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/1141314
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

2016-05-24 12:39:06 -07:00

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