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| author |   Milton Miller <miltonm@bga.com> | 2011-06-24 09:05:23 +0000 |
|---|---|---|
| committer |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-09-20 09:18:38 +1000 |
| commit | 3a8f7558e475b68254d8bc3a2211f3f89bf67a71 (patch) | |
| tree | 798872b1cef90988846350f4d420954238107427 /arch/powerpc/platforms | |
| parent | powerpc: Override dma_get_required_mask by platform hook and ops (diff) | |
| download | linux-dev-3a8f7558e475b68254d8bc3a2211f3f89bf67a71.tar.xz linux-dev-3a8f7558e475b68254d8bc3a2211f3f89bf67a71.zip | |
dma-mapping: Add get_required_mask if arch overrides default
If an architecture sets ARCH_HAS_DMA_GET_REQUIRED_MASK and has settable
dma_map_ops, the required mask may change by the ops implementation.
For example, a system that always has an mmu inline may only require 32
bits while a swiotlb would desire bits to cover all of memory.
Therefore add the field if the architecture does not use the generic
definition of dma_get_required_mask. The first use will by by powerpc.
Note that this does add some dependency on the order in which files are
visible here.
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Diffstat (limited to 'arch/powerpc/platforms')
0 files changed, 0 insertions, 0 deletions