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| author |   Bob Pearson <rpearsonhpe@gmail.com> | 2021-09-14 11:42:03 -0500 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@nvidia.com> | 2021-09-24 10:14:59 -0300 |
| commit | ae6e843fe08d0ea8e158815809dcc20e3a1afc22 (patch) | |
| tree | 723ed25b8a0edfde968f72ace5f837daf880e61d /drivers/infiniband/sw/rxe/rxe_comp.c | |
| parent | RDMA/bnxt_re: Check if the vlan is valid before reporting (diff) | |
| download | linux-dev-ae6e843fe08d0ea8e158815809dcc20e3a1afc22.tar.xz linux-dev-ae6e843fe08d0ea8e158815809dcc20e3a1afc22.zip | |
RDMA/rxe: Add memory barriers to kernel queues
Earlier patches added memory barriers to protect user space to kernel
space communications. The user space queues were previously shown to have
occasional memory synchonization errors which were removed by adding
smp_load_acquire, smp_store_release barriers. This patch extends that to
the case where queues are used between kernel space threads.
This patch also extends the queue types to include kernel ULP queues which
access the other end of the queues in kernel verbs calls like poll_cq and
post_send/recv.
Link: https://lore.kernel.org/r/20210914164206.19768-2-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/sw/rxe/rxe_comp.c')
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe_comp.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_comp.c b/drivers/infiniband/sw/rxe/rxe_comp.c index d2d802c776fd..48a3864ada29 100644 --- a/drivers/infiniband/sw/rxe/rxe_comp.c +++ b/drivers/infiniband/sw/rxe/rxe_comp.c @@ -142,10 +142,7 @@ static inline enum comp_state get_wqe(struct rxe_qp *qp, /* we come here whether or not we found a response packet to see if * there are any posted WQEs */ - if (qp->is_user) - wqe = queue_head(qp->sq.queue, QUEUE_TYPE_FROM_USER); - else - wqe = queue_head(qp->sq.queue, QUEUE_TYPE_KERNEL); + wqe = queue_head(qp->sq.queue, QUEUE_TYPE_FROM_CLIENT); *wqe_p = wqe; /* no WQE or requester has not started it yet */ @@ -432,10 +429,7 @@ static void do_complete(struct rxe_qp *qp, struct rxe_send_wqe *wqe) if (post) make_send_cqe(qp, wqe, &cqe); - if (qp->is_user) - advance_consumer(qp->sq.queue, QUEUE_TYPE_FROM_USER); - else - advance_consumer(qp->sq.queue, QUEUE_TYPE_KERNEL); + queue_advance_consumer(qp->sq.queue, QUEUE_TYPE_FROM_CLIENT); if (post) rxe_cq_post(qp->scq, &cqe, 0); @@ -539,7 +533,7 @@ static void rxe_drain_resp_pkts(struct rxe_qp *qp, bool notify) wqe->status = IB_WC_WR_FLUSH_ERR; do_complete(qp, wqe); } else { - advance_consumer(q, q->type); + queue_advance_consumer(q, q->type); } } } |