This is a note to let you know that I've just added the patch titled
RDMA/bnxt_re: Fix MSN table size for variable wqe mode
to the 6.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rdma-bnxt_re-fix-msn-table-size-for-variable-wqe-mod.patch
and it can be found in the queue-6.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 429aba870f64484fc1f2e533a90360053a1b2425
Author: Damodharam Ammepalli <damodharam.ammepalli@xxxxxxxxxxxx>
Date: Tue Dec 17 15:56:48 2024 +0530
RDMA/bnxt_re: Fix MSN table size for variable wqe mode
[ 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>
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.c b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
index f5db29707449..3a34154b0d9d 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;
}
