This patch series add a support for rxe driver. A dma-buf based memory registering has beed introduced to use the memory region that lack of associated page structures (e.g. device memory and CMA managed memory) [1]. However, to use the dma-buf based memory, each rdma device drivers require add some implementation. The rxe driver has not support yet. [1] https://www.spinics.net/lists/linux-rdma/msg98592.html To enable to use the memories in rxe rdma device, add some changes and implementation in this patch series. This series consists of three patches. The first patch changes the IB core to support for rdma drivers that have not real dma device. The second patch extracts a memory mapping process of rxe as a common function to use a dma-buf support. The third patch adds the dma-buf support to rxe driver. Related user space RDMA library changes are provided as a separate patch. Shunsuke Mie (3): RDMA/umem: Change for rdma devices has not dma device RDMA/rxe: Extract a mapping process into a function RDMA/rxe: Support dma-buf as memory region drivers/infiniband/core/umem_dmabuf.c | 2 +- drivers/infiniband/sw/rxe/rxe_loc.h | 3 + drivers/infiniband/sw/rxe/rxe_mr.c | 186 +++++++++++++++++++++----- drivers/infiniband/sw/rxe/rxe_verbs.c | 36 +++++ 4 files changed, 193 insertions(+), 34 deletions(-) -- 2.17.1
