Please note that drm_gem_cma_object only looks at memory after the MMU
>
> Current MM:
> 1. drm_gem_cma_object, only support contiguous memory
has done the mapping. If you have a good IOMMU driver that registers
correctly the dma_ops then you can allocate memory from anywhere and
still import it into the lima driver via drm_gem_cma_prime_import_sg_table()
hook attached to the gem_prime_import_sg_table.
Thanks, good to know this. But some Mali400/450 SoC doesn't have IOMMU
at all, so I can't rely on it.
Regards,
Qiang
> 3. buffer is not really allocated when GEM_CREATE, but in CPU
> page fault handler and task submit buffer validation which make
> sure no GPU page fault
> 4. in shrinker handler, free un-used page in the pool, if still not
> enough, swap some idle buffer to disk
>
> 3&4 apply to both dma_alloc buffer and alloc_page buffer.
>
> Thanks,
> Qiang
> _______________________________________________ --
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> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
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