[POWERPC] Avoid DMA exception when using axon_msi with IOMMU

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There's a brown-paper-bag bug in axon_msi, we pass the address of our
FIFO directly to the hardware, without DMA mapping it.  This leads to
DMA exceptions if you enable MSI & the IOMMU.

The fix is to correctly DMA map the fifo, dma_alloc_coherent() does
what we want - and we need to track the virt & phys addresses.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

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Michael Ellerman 2008-01-25 16:59:14 +11:00 • committed by Paul Mackerras

parent e4347dfb58

commit de4c928b84

1 changed files with 10 additions and 11 deletions

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arch/powerpc/platforms/cell/axon_msi.c

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