Hi all, As discussed on the linux-rdma list, there is plenty of room for improvement in our memory registration APIs. We keep finding ULPs that are duplicating code, sometimes use wrong strategies and mis-use our current API. As a first step, this patch set replaces the fast registration API to accept a kernel common struct scatterlist and takes care of the page vector construction in the core layer with hooks for the drivers HW specific assignments. This allows to remove a common code duplication as it was done in each and every ULP driver. The changes from v0 (WIP) are: - Rebased on top of 4.3-rc1 + Christoph's ib_send_wr conversion patches - Allow the ULP to pass page_size argument to ib_map_mr_sg in order to have it work better in some specific workloads. This suggestion came from Bart Van Assache which pointed out that some applications might use page sizes significantly smaller than the system PAGE_SIZE of specific architectures - Fixed some logical bugs in ib_sg_to_pages - Added a set_page function pointer for drivers to pass to ib_sg_to_pages so some drivers (e.g mlx4, mlx5, nes) can avoid keeping a second page vector and/or re-iterate on the page vector in order to perform HW specific assignments (big/little endian conversion, extra flags) - Converted SRP initiator and RDS iwarp ULPs to the new API - Removed fast registration code from hfi1 driver (as it isn't supported anyway). I assume that the correct place to get the support back would be in a shared SW library (hfi1, qib, rxe). - Updated the change logs So far my tests covered: - ULPs: * iser initiator * iser target * xprtrdma * svcrdma - Drivers: * mlx4 * mlx5 * Steve Wise was kind enough to run NFS client/server over cxgb4 and I have yet to receive any negative feedback from him. I don't have access to other HW devices (qib, nes) nor iwarp devices so RDS is compile tested only. I'm targeting this to 4.4 so I'll appreciate more feedback and a bigger testing coverage. The code is available at: https://github.com/sagigrimberg/linux/tree/reg_api.3 Sagi Grimberg (24): IB/core: Introduce new fast registration API IB/mlx5: Remove dead fmr code IB/mlx5: Support the new memory registration API IB/mlx4: Support the new memory registration API RDMA/ocrdma: Support the new memory registration API RDMA/cxgb3: Support the new memory registration API iw_cxgb4: Support the new memory registration API IB/qib: Support the new memory registration API RDMA/nes: Support the new memory registration API IB/iser: Port to new fast registration API iser-target: Port to new memory registration API xprtrdma: Port to new memory registration API svcrdma: Port to new memory registration API RDS/IW: Convert to new memory registration API IB/srp: Convert to new memory registration API IB/mlx5: Remove old FRWR API support IB/mlx4: Remove old FRWR API support RDMA/ocrdma: Remove old FRWR API RDMA/cxgb3: Remove old FRWR API iw_cxgb4: Remove old FRWR API IB/qib: Remove old FRWR API RDMA/nes: Remove old FRWR API IB/hfi1: Remove Old fast registraion API support IB/core: Remove old fast registration API drivers/infiniband/core/verbs.c | 132 ++++++++++++--- drivers/infiniband/hw/cxgb3/iwch_cq.c | 2 +- drivers/infiniband/hw/cxgb3/iwch_provider.c | 39 +++-- drivers/infiniband/hw/cxgb3/iwch_provider.h | 2 + drivers/infiniband/hw/cxgb3/iwch_qp.c | 37 +++-- drivers/infiniband/hw/cxgb4/cq.c | 2 +- drivers/infiniband/hw/cxgb4/iw_cxgb4.h | 25 +-- drivers/infiniband/hw/cxgb4/mem.c | 61 +++---- drivers/infiniband/hw/cxgb4/provider.c | 3 +- drivers/infiniband/hw/cxgb4/qp.c | 46 +++--- drivers/infiniband/hw/mlx4/cq.c | 2 +- drivers/infiniband/hw/mlx4/main.c | 3 +- drivers/infiniband/hw/mlx4/mlx4_ib.h | 22 +-- drivers/infiniband/hw/mlx4/mr.c | 120 ++++++++------ drivers/infiniband/hw/mlx4/qp.c | 30 ++-- drivers/infiniband/hw/mlx5/cq.c | 4 +- drivers/infiniband/hw/mlx5/main.c | 3 +- drivers/infiniband/hw/mlx5/mlx5_ib.h | 47 +----- drivers/infiniband/hw/mlx5/mr.c | 107 +++++++----- drivers/infiniband/hw/mlx5/qp.c | 140 ++++++++-------- drivers/infiniband/hw/nes/nes_hw.h | 6 - drivers/infiniband/hw/nes/nes_verbs.c | 161 +++++++----------- drivers/infiniband/hw/nes/nes_verbs.h | 4 + drivers/infiniband/hw/ocrdma/ocrdma.h | 2 + drivers/infiniband/hw/ocrdma/ocrdma_main.c | 3 +- drivers/infiniband/hw/ocrdma/ocrdma_verbs.c | 151 ++++++++--------- drivers/infiniband/hw/ocrdma/ocrdma_verbs.h | 7 +- drivers/infiniband/hw/qib/qib_keys.c | 40 ++--- drivers/infiniband/hw/qib/qib_mr.c | 46 +++--- drivers/infiniband/hw/qib/qib_verbs.c | 13 +- drivers/infiniband/hw/qib/qib_verbs.h | 13 +- drivers/infiniband/ulp/iser/iscsi_iser.h | 8 +- drivers/infiniband/ulp/iser/iser_memory.c | 53 +++--- drivers/infiniband/ulp/iser/iser_verbs.c | 16 +- drivers/infiniband/ulp/isert/ib_isert.c | 129 +++------------ drivers/infiniband/ulp/isert/ib_isert.h | 2 - drivers/infiniband/ulp/srp/ib_srp.c | 248 +++++++++++++++++----------- drivers/infiniband/ulp/srp/ib_srp.h | 11 +- drivers/staging/hfi1/keys.c | 55 ------ drivers/staging/hfi1/mr.c | 32 +--- drivers/staging/hfi1/verbs.c | 9 +- drivers/staging/hfi1/verbs.h | 8 - include/linux/sunrpc/svc_rdma.h | 6 +- include/rdma/ib_verbs.h | 70 +++----- net/rds/iw.h | 5 +- net/rds/iw_rdma.c | 118 +++++-------- net/rds/iw_send.c | 57 ++++--- net/sunrpc/xprtrdma/frwr_ops.c | 112 +++++++------ net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | 76 +++++---- net/sunrpc/xprtrdma/svc_rdma_transport.c | 34 ++-- net/sunrpc/xprtrdma/xprt_rdma.h | 3 +- 51 files changed, 1067 insertions(+), 1258 deletions(-) -- 1.8.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
