IB/mlx4: Implement query QP

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/net/mlx4/qp.c b/drivers/net/mlx4/qp.c
index 492cfaaaa75c..19b48c71cf7f 100644
--- a/drivers/net/mlx4/qp.c
+++ b/drivers/net/mlx4/qp.c
@@ -277,3 +277,24 @@ void mlx4_cleanup_qp_table(struct mlx4_dev *dev)
         mlx4_CONF_SPECIAL_QP(dev, 0);
         mlx4_bitmap_cleanup(&mlx4_priv(dev)->qp_table.bitmap);
 }
+
+int mlx4_qp_query(struct mlx4_dev *dev, struct mlx4_qp *qp,
+                  struct mlx4_qp_context *context)
+{
+        struct mlx4_cmd_mailbox *mailbox;
+        int err;
+
+        mailbox = mlx4_alloc_cmd_mailbox(dev);
+        if (IS_ERR(mailbox))
+                return PTR_ERR(mailbox);
+
+        err = mlx4_cmd_box(dev, 0, mailbox->dma, qp->qpn, 0,
+                           MLX4_CMD_QUERY_QP, MLX4_CMD_TIME_CLASS_A);
+        if (!err)
+                memcpy(context, mailbox->buf + 8, sizeof *context);
+
+        mlx4_free_cmd_mailbox(dev, mailbox);
+        return err;
+}
+EXPORT_SYMBOL_GPL(mlx4_qp_query);
+