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lib/dma-virt: Add dma_virt_ops

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Several RDMA drivers (hfi1, qib and rxe) expect that ib_sge.addr
is a virtual address. Provide DMA mapping operations that are
suitable for these drivers.

Signed-off-by: Bart Van Assche <[email protected]>
Cc: Christian Borntraeger <[email protected]>
Cc: Joerg Roedel <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Michael S. Tsirkin <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>
This commit is contained in:
Bart Van Assche 2017-01-20 13:04:07 -08:00 • committed by Doug Ledford
commit 551199aca1
4 changed files with 79 additions and 0 deletions
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5
lib/Kconfig
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@ -400,6 +400,11 @@ config DMA_NOOP_OPS
depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT)
default n
config DMA_VIRT_OPS
bool
depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT)
default n
config CHECK_SIGNATURE
bool