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[for-rc,4/5] RDMA/bnxt_re: Fix MSN table size for variable wqe mode

Message ID 20241217102649.1377704-5-kalesh-anakkur.purayil@broadcom.com (mailing list archive)
State New
Headers show
Series bnxt_re bug fixes | expand

Commit Message

Kalesh AP Dec. 17, 2024, 10:26 a.m. UTC 
From: Damodharam Ammepalli <damodharam.ammepalli@broadcom.com>

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>
---
 drivers/infiniband/hw/bnxt_re/qplib_fp.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.c b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
index d8a2a929bbe3..951ad90f5aa9 100644
--- 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;
 	}