powerpc: Use the newly added get_required_mask dma_map_ops hook

Now that the generic code has dma_map_ops set, instead of having a
messy ifdef & if block in the base dma_get_required_mask hook push
the computation into the dma ops.

If the ops fails to set the get_required_mask hook default to the
width of dma_addr_t.

This also corrects ibmbus ibmebus_dma_supported to require a 64
bit mask.  I doubt anything is checking or setting the dma mask on
that bus.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-kernel@vger.kernel.org
Cc: benh@kernel.crashing.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Milton Miller
2011-06-24 09:05:24 +00:00
committed by Benjamin Herrenschmidt
parent 3a8f7558e4
commit d24f9c6999
10 changed files with 68 additions and 34 deletions

View File

@ -37,4 +37,6 @@ struct pdev_archdata {
u64 dma_mask;
};
#define ARCH_HAS_DMA_GET_REQUIRED_MASK
#endif /* _ASM_POWERPC_DEVICE_H */