6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Damodharam Ammepalli <damodharam.ammepalli@xxxxxxxxxxxx>
[ 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 <kashyap.desai@xxxxxxxxxxxx>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@xxxxxxxxxxxx>
Signed-off-by: Damodharam Ammepalli <damodharam.ammepalli@xxxxxxxxxxxx>
Signed-off-by: Selvin Xavier <selvin.xavier@xxxxxxxxxxxx>
Link: https://patch.msgid.link/20241217102649.1377704-5-kalesh-anakkur.purayil@xxxxxxxxxxxx
Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 2f85245d1285..1355061d698d 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_fp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
@@ -1013,7 +1013,12 @@ 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;
}
--
2.39.5
