IB/mlx5: Fix pkey_index length in the QP path record

Pkey index fields in the QP context path record are extended to 16
bits, as required by IB spec (version 1.3).
This change affects all QP commands which include path records.

To enable this change, moved the free adaptive routing flag bit
(free_ar) to the most significant byte of the QP path record.

Fixes: e126ba97dba9e ('mlx5: Add driver for Mellanox Connect-IB ...')
Signed-off-by: Noa Osherovich <noaos@mellanox.com>
Reviewed-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

2 files changed, 10 insertions, 10 deletions

diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index 43c1441b6fb8..6b90bfdea830 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -1859,7 +1859,7 @@ static int mlx5_set_path(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp,
         int err;
 
         if (attr_mask & IB_QP_PKEY_INDEX)
-                path->pkey_index = attr->pkey_index;
+                path->pkey_index = cpu_to_be16(attr->pkey_index);
 
         if (ah->ah_flags & IB_AH_GRH) {
                 if (ah->grh.sgid_index >=
@@ -1879,9 +1879,9 @@ static int mlx5_set_path(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp,
                                                           ah->grh.sgid_index);
                 path->dci_cfi_prio_sl = (ah->sl & 0x7) << 4;
         } else {
-                path->fl = (path_flags & MLX5_PATH_FLAG_FL) ? 0x80 : 0;
-                path->free_ar = (path_flags & MLX5_PATH_FLAG_FREE_AR) ? 0x80 :
-                                                                        0;
+                path->fl_free_ar = (path_flags & MLX5_PATH_FLAG_FL) ? 0x80 : 0;
+                path->fl_free_ar |=
+                        (path_flags & MLX5_PATH_FLAG_FREE_AR) ? 0x40 : 0;
                 path->rlid = cpu_to_be16(ah->dlid);
                 path->grh_mlid = ah->src_path_bits & 0x7f;
                 if (ah->ah_flags & IB_AH_GRH)
@@ -2266,7 +2266,7 @@ static int __mlx5_ib_modify_qp(struct ib_qp *ibqp,
                 context->log_pg_sz_remote_qpn = cpu_to_be32(attr->dest_qp_num);
 
         if (attr_mask & IB_QP_PKEY_INDEX)
-                context->pri_path.pkey_index = attr->pkey_index;
+                context->pri_path.pkey_index = cpu_to_be16(attr->pkey_index);
 
         /* todo implement counter_index functionality */
 
@@ -4015,11 +4015,12 @@ static int query_qp_attr(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp,
         if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) {
                 to_ib_ah_attr(dev, &qp_attr->ah_attr, &context->pri_path);
                 to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context->alt_path);
-                qp_attr->alt_pkey_index = context->alt_path.pkey_index & 0x7f;
+                qp_attr->alt_pkey_index =
+                        be16_to_cpu(context->alt_path.pkey_index);
                 qp_attr->alt_port_num   = qp_attr->alt_ah_attr.port_num;
         }
 
-        qp_attr->pkey_index = context->pri_path.pkey_index & 0x7f;
+        qp_attr->pkey_index = be16_to_cpu(context->pri_path.pkey_index);
         qp_attr->port_num = context->pri_path.port;
 
         /* qp_attr->en_sqd_async_notify is only applicable in modify qp */
diff --git a/include/linux/mlx5/qp.h b/include/linux/mlx5/qp.h
index 64221027bf1f..e4e29882fdfd 100644
--- a/include/linux/mlx5/qp.h
+++ b/include/linux/mlx5/qp.h
@@ -460,10 +460,9 @@ struct mlx5_core_qp {
 };
 
 struct mlx5_qp_path {
-        u8                      fl;
+        u8                      fl_free_ar;
         u8                      rsvd3;
-        u8                      free_ar;
-        u8                      pkey_index;
+        __be16                  pkey_index;
         u8                      rsvd0;
         u8                      grh_mlid;
         __be16                  rlid;