From aee6457f9d8980133999dc0647b447f74914590f Mon Sep 17 00:00:00 2001 From: Damodharam Ammepalli Date: Tue, 17 Dec 2024 15:56:48 +0530 Subject: [PATCH] RDMA/bnxt_re: Fix MSN table size for variable wqe mode BugLink: https://bugs.launchpad.net/bugs/2106632 [ Upstream commit bb839f3ace0fee532a0487b692cc4d868fccb7cf ] 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 Reviewed-by: Kalesh AP Signed-off-by: Damodharam Ammepalli Signed-off-by: Selvin Xavier Link: https://patch.msgid.link/20241217102649.1377704-5-kalesh-anakkur.purayil@broadcom.com Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin Signed-off-by: Manuel Diewald Signed-off-by: Mehmet Basaran --- drivers/infiniband/hw/bnxt_re/qplib_fp.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.c b/drivers/infiniband/hw/bnxt_re/qplib_fp.c index 816ad5d5fc8d..4e61eaaac68c 100644 --- a/drivers/infiniband/hw/bnxt_re/qplib_fp.c +++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.c @@ -1032,7 +1032,12 @@ 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; }