Restore failure of destroy commands

From: Leon Romanovsky <[email protected]>

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 a retrospective, 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 destoyed in proper order.

Thanks

Leon Romanovsky (10):
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/mlx5: Fix potential race between destroy and CQE poll
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                  |  36 +++---
 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               |  21 ++--
 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, 313 insertions(+), 275 deletions(-)

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2.26.2