linux/include/rdma, branch v5.9

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

2020-08-06T23:43:36Z

Pull rdma updates from Jason Gunthorpe: "A quiet cycle after the larger 5.8 effort. Substantially cleanup and driver work with a few smaller features this time. - Driver updates for hfi1, rxe, mlx5, hns, qedr, usnic, bnxt_re - Removal of dead or redundant code across the drivers - RAW resource tracker dumps to include a device specific data blob for device objects to aide device debugging - Further advance the IOCTL interface, remove the ability to turn it off. Add QUERY_CONTEXT, QUERY_MR, and QUERY_PD commands - Remove stubs related to devices with no pkey table - A shared CQ scheme to allow multiple ULPs to share the CQ rings of a device to give higher performance - Several more static checker, syzkaller and rare crashers fixed" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (121 commits) RDMA/mlx5: Fix flow destination setting for RDMA TX flow table RDMA/rxe: Remove pkey table RDMA/umem: Add a schedule point in ib_umem_get() RDMA/hns: Fix the unneeded process when getting a general type of CQE error RDMA/hns: Fix error during modify qp RTS2RTS RDMA/hns: Delete unnecessary memset when allocating VF resource RDMA/hns: Remove redundant parameters in set_rc_wqe() RDMA/hns: Remove support for HIP08_A RDMA/hns: Refactor hns_roce_v2_set_hem() RDMA/hns: Remove redundant hardware opcode definitions RDMA/netlink: Remove CAP_NET_RAW check when dump a raw QP RDMA/include: Replace license text with SPDX tags RDMA/rtrs: remove WQ_MEM_RECLAIM for rtrs_wq RDMA/rtrs-clt: add an additional random 8 seconds before reconnecting RDMA/cma: Execute rdma_cm destruction from a handler properly RDMA/cma: Remove unneeded locking for req paths RDMA/cma: Using the standard locking pattern when delivering the removal event RDMA/cma: Simplify DEVICE_REMOVAL for internal_id RDMA/efa: Add EFA 0xefa1 PCI ID RDMA/efa: User/kernel compatibility handshake mechanism ...

IB/rdmavt: Fix RQ counting issues causing use of an invalid RWQE

2020-07-29T18:54:36Z

The lookaside count is improperly initialized to the size of the Receive Queue with the additional +1. In the traces below, the RQ size is 384, so the count was set to 385. The lookaside count is then rarely refreshed. Note the high and incorrect count in the trace below: rvt_get_rwqe: [hfi1_0] wqe ffffc900078e9008 wr_id 55c7206d75a0 qpn c qpt 2 pid 3018 num_sge 1 head 1 tail 0, count 385 rvt_get_rwqe: (hfi1_rc_rcv+0x4eb/0x1480 [hfi1] <- rvt_get_rwqe) ret=0x1 The head,tail indicate there is only one RWQE posted although the count says 385 and we correctly return the element 0. The next call to rvt_get_rwqe with the decremented count: rvt_get_rwqe: [hfi1_0] wqe ffffc900078e9058 wr_id 0 qpn c qpt 2 pid 3018 num_sge 0 head 1 tail 1, count 384 rvt_get_rwqe: (hfi1_rc_rcv+0x4eb/0x1480 [hfi1] <- rvt_get_rwqe) ret=0x1 Note that the RQ is empty (head == tail) yet we return the RWQE at tail 1, which is not valid because of the bogus high count. Best case, the RWQE has never been posted and the rc logic sees an RWQE that is too small (all zeros) and puts the QP into an error state. In the worst case, a server slow at posting receive buffers might fool rvt_get_rwqe() into fetching an old RWQE and corrupt memory. Fix by deleting the faulty initialization code and creating an inline to fetch the posted count and convert all callers to use new inline. Fixes: f592ae3c999f ("IB/rdmavt: Fracture single lock used for posting and processing RWQEs") Link: https://lore.kernel.org/r/20200728183848.22226.29132.stgit@awfm-01.aw.intel.com Reported-by: Zhaojuan Guo Cc: # 5.4.x Reviewed-by: Kaike Wan Signed-off-by: Mike Marciniszyn Tested-by: Honggang Li Signed-off-by: Jason Gunthorpe

RDMA/include: Replace license text with SPDX tags

2020-07-29T17:48:36Z

The header files in RDMA subsystem are dual licensed and can be described by simple SPDX tag, so replace all of them at once together with making them use the same coding style for header guard defines. Link: https://lore.kernel.org/r/20200719072521.135260-1-leon@kernel.org Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe

RDMA/core: Align abort/commit object scheme for write() and ioctl() paths

2020-07-24T18:57:22Z

Create the same logic flow for the write() interface as we have for the ioctl() path by making sure that the object is committed or aborted automatically after HW object creation. Link: https://lore.kernel.org/r/20200719052223.75245-2-leon@kernel.org Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe

RDMA: Move XRCD to be under ib_core responsibility

2020-07-06T23:11:24Z

Update the code to allocate and free ib_xrcd structure in the ib_core instead of inside drivers. Link: https://lore.kernel.org/r/20200630101855.368895-4-leon@kernel.org Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe

RDMA/core: Create and destroy counters in the ib_core

2020-07-06T23:04:40Z

Move allocation and destruction of counters under ib_core responsibility Link: https://lore.kernel.org/r/20200630101855.368895-2-leon@kernel.org Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe

IB/uverbs: Expose UAPI to query ucontext

2020-07-06T22:50:33Z

Expose UAPI to query ucontext, this will let user space application that didn't allocate the ucontext but has access to by owning the matching command FD to retrieve the ucontext information. Link: https://lore.kernel.org/r/20200630093916.332097-4-leon@kernel.org Signed-off-by: Yishai Hadas Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe

RDMA/core: Optimize XRC target lookup

2020-07-06T22:32:23Z

Replace the mutex with read write semaphore and use xarray instead of linked list for XRC target QPs. This will give faster XRC target lookup. In addition, when QP is closed, don't insert it back to the xarray if the destroy command failed. Link: https://lore.kernel.org/r/20200706122716.647338-4-leon@kernel.org Signed-off-by: Maor Gottlieb Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe

RDMA/core: Clean ib_alloc_xrcd() and reuse it to allocate XRC domain

2020-07-06T22:32:23Z

ib_alloc_xrcd() already does the required initialization, so move the uverbs to call it and save code duplication, while cleaning the function argument lists of that function. Link: https://lore.kernel.org/r/20200706122716.647338-3-leon@kernel.org Signed-off-by: Maor Gottlieb Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe

RDMA: Remove the udata parameter from alloc_mr callback

2020-07-06T22:25:53Z

Allocating an MR flow can only be initiated by kernel users, and not from userspace so a udata parameter is redundant. Link: https://lore.kernel.org/r/20200706120343.10816-4-galpress@amazon.com Signed-off-by: Gal Pressman Reviewed-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe