From: Leon Romanovsky <leonro@xxxxxxxxxx> Changelog: v2: * Rebased on top of the 524d8ffd07f0 * Removed "udata" check in destroy flows * Changed ib_free_cq to return early * Used Jason's suggestion to implement "RDMA/mlx5: Issue FW command to destroy SRQ on reentry" patch. v1 * Changed returned value in efa_destroy_ah() from EINVAL to EOPNOTSUPP * https://lore.kernel.org/lkml/20200830084010.102381-1-leon@xxxxxxxxxx v0: * https://lore.kernel.org/lkml/20200824103247.1088464-1-leon@xxxxxxxxxx ----------------------------------------------------------------------------- Hi, This series restores the ability to fail on destroy commands, due to the fact that mlx5_ib DEVX implementation interleaved ib_core objects with FW objects without sharing reference counters. In retrospect, every part of the mlx5_ib flow is correct. It started from IBTA which was written by HW engineers with HW in mind and they allowed to fail in destruction. FW implemented it with symmetrical interface like any other command and propagated error back to the kernel, which forwarded it to the libibverbs and kernel ULPs. Libibverbs was designed with IBTA spec in hand putting destroy errors in stone. Up till mlx5_ib DEVX, it worked well, because the IB verbs objects are counted by the kernel and ib_core ensures that FW destroy will success by managing various reference counters on such objects. The extension of the mlx5 driver changed this flow when allowed DEVX objects that are not managed by ib_core to be interleaved with the ones under ib_core responsibility. The drivers that want to implement DEVX flows must ensure that FW/HW destroys are performed as early as possible before any other internal cleanup. After HW destroys, drivers are not allowed to fail. This series includes two patches (WQ and "potential race") that will require extra work in mlx5_ib, they both theoretical. WQ is not in use in DEVX, but is needed to make interface symmetrical to other objects. "Potential race" is in ULP flow that ensures that SRQ is destroyed in proper order. Thanks Leon Romanovsky (9): RDMA: Restore ability to fail on PD deallocate RDMA: Restore ability to fail on AH destroy RDMA/mlx5: Issue FW command to destroy SRQ on reentry RDMA: Restore ability to fail on SRQ destroy RDMA/core: Delete function indirection for alloc/free kernel CQ RDMA: Allow fail of destroy CQ RDMA: Change XRCD destroy return value RDMA: Restore ability to return error for destroy WQ RDMA: Make counters destroy symmetrical drivers/infiniband/core/cq.c | 30 ++--- drivers/infiniband/core/uverbs_std_types.c | 3 +- .../core/uverbs_std_types_counters.c | 4 +- drivers/infiniband/core/uverbs_std_types_wq.c | 2 +- drivers/infiniband/core/verbs.c | 56 +++++++--- drivers/infiniband/hw/bnxt_re/ib_verbs.c | 12 +- drivers/infiniband/hw/bnxt_re/ib_verbs.h | 8 +- drivers/infiniband/hw/cxgb4/cq.c | 3 +- drivers/infiniband/hw/cxgb4/iw_cxgb4.h | 4 +- drivers/infiniband/hw/cxgb4/provider.c | 3 +- drivers/infiniband/hw/cxgb4/qp.c | 3 +- drivers/infiniband/hw/efa/efa.h | 6 +- drivers/infiniband/hw/efa/efa_verbs.c | 11 +- drivers/infiniband/hw/hns/hns_roce_ah.c | 5 - drivers/infiniband/hw/hns/hns_roce_cq.c | 3 +- drivers/infiniband/hw/hns/hns_roce_device.h | 13 ++- drivers/infiniband/hw/hns/hns_roce_hw_v1.c | 3 +- drivers/infiniband/hw/hns/hns_roce_pd.c | 3 +- drivers/infiniband/hw/hns/hns_roce_srq.c | 3 +- drivers/infiniband/hw/i40iw/i40iw_verbs.c | 6 +- drivers/infiniband/hw/mlx4/ah.c | 5 - drivers/infiniband/hw/mlx4/cq.c | 3 +- drivers/infiniband/hw/mlx4/main.c | 6 +- drivers/infiniband/hw/mlx4/mlx4_ib.h | 11 +- drivers/infiniband/hw/mlx4/qp.c | 3 +- drivers/infiniband/hw/mlx4/srq.c | 3 +- drivers/infiniband/hw/mlx5/ah.c | 5 - drivers/infiniband/hw/mlx5/cmd.c | 4 +- drivers/infiniband/hw/mlx5/cmd.h | 2 +- drivers/infiniband/hw/mlx5/counters.c | 3 +- drivers/infiniband/hw/mlx5/cq.c | 16 ++- drivers/infiniband/hw/mlx5/main.c | 4 +- drivers/infiniband/hw/mlx5/mlx5_ib.h | 13 ++- drivers/infiniband/hw/mlx5/qp.c | 12 +- drivers/infiniband/hw/mlx5/qp.h | 4 +- drivers/infiniband/hw/mlx5/qpc.c | 5 +- drivers/infiniband/hw/mlx5/srq.c | 26 ++--- drivers/infiniband/hw/mlx5/srq.h | 2 +- drivers/infiniband/hw/mlx5/srq_cmd.c | 22 +++- drivers/infiniband/hw/mthca/mthca_provider.c | 12 +- drivers/infiniband/hw/ocrdma/ocrdma_ah.c | 3 +- drivers/infiniband/hw/ocrdma/ocrdma_ah.h | 2 +- drivers/infiniband/hw/ocrdma/ocrdma_verbs.c | 11 +- drivers/infiniband/hw/ocrdma/ocrdma_verbs.h | 6 +- drivers/infiniband/hw/qedr/verbs.c | 14 ++- drivers/infiniband/hw/qedr/verbs.h | 8 +- drivers/infiniband/hw/usnic/usnic_ib_verbs.c | 7 +- drivers/infiniband/hw/usnic/usnic_ib_verbs.h | 4 +- drivers/infiniband/hw/vmw_pvrdma/pvrdma_cq.c | 3 +- drivers/infiniband/hw/vmw_pvrdma/pvrdma_srq.c | 3 +- .../infiniband/hw/vmw_pvrdma/pvrdma_verbs.c | 8 +- .../infiniband/hw/vmw_pvrdma/pvrdma_verbs.h | 8 +- drivers/infiniband/sw/rdmavt/ah.c | 3 +- drivers/infiniband/sw/rdmavt/ah.h | 2 +- drivers/infiniband/sw/rdmavt/cq.c | 3 +- drivers/infiniband/sw/rdmavt/cq.h | 2 +- drivers/infiniband/sw/rdmavt/pd.c | 3 +- drivers/infiniband/sw/rdmavt/pd.h | 2 +- drivers/infiniband/sw/rdmavt/srq.c | 3 +- drivers/infiniband/sw/rdmavt/srq.h | 2 +- drivers/infiniband/sw/rxe/rxe_verbs.c | 12 +- drivers/infiniband/sw/siw/siw_verbs.c | 9 +- drivers/infiniband/sw/siw/siw_verbs.h | 6 +- drivers/infiniband/ulp/ipoib/ipoib_cm.c | 6 +- include/rdma/ib_verbs.h | 105 +++++------------- 65 files changed, 308 insertions(+), 269 deletions(-) -- 2.26.2
