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author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2013-10-09 21:18:14 +0400 |
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committer | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2013-10-09 21:18:14 +0400 |
commit | d6fe76c58c358498b91d21f0ca8054f6aa6e672d (patch) | |
tree | 7a351e4ddefe07831842757ddd32b46156bc69a4 /include/xen/xen-ops.h | |
parent | 58c8b26909f287c72a7a39d26f800ffe61e01bf3 (diff) | |
download | linux-d6fe76c58c358498b91d21f0ca8054f6aa6e672d.tar.xz |
xen: introduce xen_alloc/free_coherent_pages
xen_swiotlb_alloc_coherent needs to allocate a coherent buffer for cpu
and devices. On native x86 is sufficient to call __get_free_pages in
order to get a coherent buffer, while on ARM (and potentially ARM64) we
need to call the native dma_ops->alloc implementation.
Introduce xen_alloc_coherent_pages to abstract the arch specific buffer
allocation.
Similarly introduce xen_free_coherent_pages to free a coherent buffer:
on x86 is simply a call to free_pages while on ARM and ARM64 is
arm_dma_ops.free.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Changes in v7:
- rename __get_dma_ops to __generic_dma_ops;
- call __generic_dma_ops(hwdev)->alloc/free on arm64 too.
Changes in v6:
- call __get_dma_ops to get the native dma_ops pointer on arm.
Diffstat (limited to 'include/xen/xen-ops.h')
0 files changed, 0 insertions, 0 deletions