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    drm/radeon/kms: fix gtt MC base alignment on rs4xx/rs690/rs740 asics · 8d369bb1
    Alex Deucher 提交于
    The asics in question have the following requirements with regard to
    their gart setups:
    
    1. The GART aperture size has to be in the form of 2^X bytes, where X is from 25 to 31
    2. The GART aperture MC base has to be aligned to a boundary equal to the size of the
    aperture.
    3. The GART page table has to be aligned to the boundary equal to the size of the table.
    4. The GART page table size is: table_entry_size * (aperture_size / page_size)
    5. The GART page table has to be allocated in non-paged, non-cached, contiguous system
    memory.
    
    This patch takes care 2.  The rest should already be handled properly.
    
    This fixes a regression noticed by: Torsten Kaiser <just.for.lkml@googlemail.com>
    Tested-by: NTorsten Kaiser <just.for.lkml@googlemail.com>
    Signed-off-by: NAlex Deucher <alexdeucher@gmail.com>
    Signed-off-by: NDave Airlie <airlied@redhat.com>
    8d369bb1
r600.c 103.5 KB