netdev - [PATCH rdma-next v3 3/3] IB/mlx5: Add page fault handler for DC initiator WQE

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Message-Id: <20190819120815.21225-4-leon@kernel.org>
Date:   Mon, 19 Aug 2019 15:08:15 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...lanox.com>
Cc:     Leon Romanovsky <leonro@...lanox.com>,
        RDMA mailing list <linux-rdma@...r.kernel.org>,
        Michael Guralnik <michaelgur@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        linux-netdev <netdev@...r.kernel.org>
Subject: [PATCH rdma-next v3 3/3] IB/mlx5: Add page fault handler for DC initiator WQE

From: Michael Guralnik <michaelgur@...lanox.com>

Parsing DC initiator WQEs upon page fault requires skipping an address
vector segment, as in UD WQEs.

Signed-off-by: Michael Guralnik <michaelgur@...lanox.com>
Signed-off-by: Leon Romanovsky <leonro@...lanox.com>
---
 drivers/infiniband/hw/mlx5/odp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c
index e7a4ea979209..e6903e90aaf1 100644
--- a/drivers/infiniband/hw/mlx5/odp.c
+++ b/drivers/infiniband/hw/mlx5/odp.c
@@ -1022,7 +1022,8 @@ static int mlx5_ib_mr_initiator_pfault_handler(
 	if (qp->ibqp.qp_type == IB_QPT_XRC_INI)
 		*wqe += sizeof(struct mlx5_wqe_xrc_seg);
 
-	if (qp->ibqp.qp_type == IB_QPT_UD) {
+	if (qp->ibqp.qp_type == IB_QPT_UD ||
+	    qp->qp_sub_type == MLX5_IB_QPT_DCI) {
 		av = *wqe;
 		if (av->dqp_dct & cpu_to_be32(MLX5_EXTENDED_UD_AV))
 			*wqe += sizeof(struct mlx5_av);
-- 
2.20.1