[PATCH rdma-rc 10/10] IB/mlx5: Fix alternate path code

Leon Romanovsky
2016-06-04T12:15:37Z

From: Achiad Shochat <achiad-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>

Userspace flag IBV_QP_ALT_PATH is supposed to set the alternate path
including fields alt_pkey_index and alt_timeout.
Added IB_QP_PKEY_INDEX and IB_QP_TIMEOUT to the attribute mask when
calling mlx5_set_path for the alternate path to force setting the
alt_pkey_index and alt_timeout values.

Fixes: bf24481a3a7c4 ('IB/mlx5: Consider alternate path in pkey ...')
Signed-off-by: Achiad Shochat <achiad-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Signed-off-by: Noa Osherovich <noaos-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Reviewed-by: Jack Morgenstein <jackm-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
Signed-off-by: Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
---
drivers/infiniband/hw/mlx5/qp.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index 6b90bfd..ce43422 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -1853,13 +1853,15 @@ static int modify_raw_packet_eth_prio(struct mlx5_core_dev *dev,
static int mlx5_set_path(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp,
const struct ib_ah_attr *ah,
struct mlx5_qp_path *path, u8 port, int attr_mask,
- u32 path_flags, const struct ib_qp_attr *attr)
+ u32 path_flags, const struct ib_qp_attr *attr,
+ bool alt)
{
enum rdma_link_layer ll = rdma_port_get_link_layer(&dev->ib_dev, port);
int err;

if (attr_mask & IB_QP_PKEY_INDEX)
- path->pkey_index = cpu_to_be16(attr->pkey_index);
+ path->pkey_index = cpu_to_be16(alt ? attr->alt_pkey_index :
+ attr->pkey_index);

if (ah->ah_flags & IB_AH_GRH) {
if (ah->grh.sgid_index >=
@@ -1905,7 +1907,7 @@ static int mlx5_set_path(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp,
path->port = port;

if (attr_mask & IB_QP_TIMEOUT)
- path->ackto_lt = attr->timeout << 3;
+ path->ackto_lt = (alt ? attr->alt_timeout : attr->timeout) << 3;

if ((qp->ibqp.qp_type == IB_QPT_RAW_PACKET) && qp->sq.wqe_cnt)
return modify_raw_packet_eth_prio(dev->mdev,
@@ -2279,7 +2281,7 @@ static int __mlx5_ib_modify_qp(struct ib_qp *ibqp,
if (attr_mask & IB_QP_AV) {
err = mlx5_set_path(dev, qp, &attr->ah_attr, &context->pri_path,
attr_mask & IB_QP_PORT ? attr->port_num : qp->port,
- attr_mask, 0, attr);
+ attr_mask, 0, attr, false);
if (err)
goto out;
}
@@ -2290,7 +2292,9 @@ static int __mlx5_ib_modify_qp(struct ib_qp *ibqp,
if (attr_mask & IB_QP_ALT_PATH) {
err = mlx5_set_path(dev, qp, &attr->alt_ah_attr,
&context->alt_path,
- attr->alt_port_num, attr_mask, 0, attr);
+ attr->alt_port_num,
+ attr_mask | IB_QP_PKEY_INDEX | IB_QP_TIMEOUT,
+ 0, attr, true);
if (err)
goto out;
}