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| author | Lijun Ou <oulijun@huawei.com> | 2020-05-08 17:45:59 +0800 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2020-05-19 20:54:59 -0300 |
| commit | 711195e57d341e58133d92cf8aaab1db24e4768d (patch) | |
| tree | 43ddd6a2777d93fbf3eda1f29f2d092267102ca4 /drivers/infiniband/hw/hns/hns_roce_hw_v2.c | |
| parent | 9581a356ccadb24d4a18c62c5c8327997e47241e (diff) | |
| download | linux-711195e57d341e58133d92cf8aaab1db24e4768d.tar.bz2 | |
RDMA/hns: Reserve one sge in order to avoid local length error
When rq/srq sge length is smaller than sq sge length, it will produce a
local length error and may cause the bus to hang. Therefore, for rq wqe
and srq wqe, one reserved sge pointing to a reserved mr is used to avoid
this error.
Link: https://lore.kernel.org/r/1588931159-56875-10-git-send-email-liweihang@huawei.com
Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/hw/hns/hns_roce_hw_v2.c')
| -rw-r--r-- | drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index d31ecaa7010c..d2c58d395962 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -629,7 +629,7 @@ static int hns_roce_v2_post_recv(struct ib_qp *ibqp, wqe_idx = (hr_qp->rq.head + nreq) & (hr_qp->rq.wqe_cnt - 1); - if (unlikely(wr->num_sge > hr_qp->rq.max_gs)) { + if (unlikely(wr->num_sge >= hr_qp->rq.max_gs)) { ibdev_err(ibdev, "rq:num_sge=%d >= qp->sq.max_gs=%d\n", wr->num_sge, hr_qp->rq.max_gs); ret = -EINVAL; @@ -649,6 +649,7 @@ static int hns_roce_v2_post_recv(struct ib_qp *ibqp, if (i < hr_qp->rq.max_gs) { dseg->lkey = cpu_to_le32(HNS_ROCE_INVALID_LKEY); dseg->addr = 0; + dseg->len = cpu_to_le32(HNS_ROCE_INVALID_SGE_LENGTH); } /* rq support inline data */ @@ -782,8 +783,8 @@ static int hns_roce_v2_post_srq_recv(struct ib_srq *ibsrq, } if (i < srq->max_gs) { - dseg[i].len = 0; - dseg[i].lkey = cpu_to_le32(0x100); + dseg[i].len = cpu_to_le32(HNS_ROCE_INVALID_SGE_LENGTH); + dseg[i].lkey = cpu_to_le32(HNS_ROCE_INVALID_LKEY); dseg[i].addr = 0; } @@ -5045,7 +5046,7 @@ static int hns_roce_v2_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr) attr->srq_limit = limit_wl; attr->max_wr = srq->wqe_cnt - 1; - attr->max_sge = srq->max_gs; + attr->max_sge = srq->max_gs - HNS_ROCE_RESERVED_SGE; out: hns_roce_free_cmd_mailbox(hr_dev, mailbox); |