RDMA/bnxt_re: Fix MSN table size for variable wqe mode

For variable size wqe mode, the MSN table size should be
half the size of the SQ depth. Fixing this to avoid wrap
around problems in the retransmission path.

Fixes: de1d364c3815 ("RDMA/bnxt_re: Add support for Variable WQE in Genp7 adapters")
Reviewed-by: Kashyap Desai <kashyap.desai@broadcom.com>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Damodharam Ammepalli <damodharam.ammepalli@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Link: https://patch.msgid.link/20241217102649.1377704-5-kalesh-anakkur.purayil@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.c b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
index d8a2a929bbe325c526bf5896f96ac14dd88a0060..951ad90f5aa9629edaed3c2744ebe2f38915e863 100644 (file)
--- a/drivers/infiniband/hw/bnxt_re/qplib_fp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
@@ -1033,7 +1033,12 @@ int bnxt_qplib_create_qp(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp)
                                    : 0;
        /* Update msn tbl size */
        if (qp->is_host_msn_tbl && psn_sz) {
-               hwq_attr.aux_depth = roundup_pow_of_two(bnxt_qplib_set_sq_size(sq, qp->wqe_mode));
+               if (qp->wqe_mode == BNXT_QPLIB_WQE_MODE_STATIC)
+                       hwq_attr.aux_depth =
+                               roundup_pow_of_two(bnxt_qplib_set_sq_size(sq, qp->wqe_mode));
+               else
+                       hwq_attr.aux_depth =
+                               roundup_pow_of_two(bnxt_qplib_set_sq_size(sq, qp->wqe_mode)) / 2;
                qp->msn_tbl_sz = hwq_attr.aux_depth;
                qp->msn = 0;
        }