mlx4_core: Add QP range reservation support

[safe/jmp/linux-2.6] / drivers / infiniband / hw / mlx4 / qp.c

diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index baa01de..39167a7 100644 (file)
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -451,6 +451,7 @@ static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
                            struct ib_qp_init_attr *init_attr,
                            struct ib_udata *udata, int sqpn, struct mlx4_ib_qp *qp)
 {
+       int qpn;
        int err;
 
        mutex_init(&qp->mutex);
@@ -545,9 +546,17 @@ static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
                }
        }
 
-       err = mlx4_qp_alloc(dev->dev, sqpn, &qp->mqp);
+       if (sqpn) {
+               qpn = sqpn;
+       } else {
+               err = mlx4_qp_reserve_range(dev->dev, 1, 1, &qpn);
+               if (err)
+                       goto err_wrid;
+       }
+
+       err = mlx4_qp_alloc(dev->dev, qpn, &qp->mqp);
        if (err)
-               goto err_wrid;
+               goto err_qpn;
 
        /*
         * Hardware wants QPN written in big-endian order (after
@@ -560,6 +569,10 @@ static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
 
        return 0;
 
+err_qpn:
+       if (!sqpn)
+               mlx4_qp_release_range(dev->dev, qpn, 1);
+
 err_wrid:
        if (pd->uobject) {
                if (!init_attr->srq)
@@ -655,6 +668,10 @@ static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
        mlx4_ib_unlock_cqs(send_cq, recv_cq);
 
        mlx4_qp_free(dev->dev, &qp->mqp);
+
+       if (!is_sqp(dev, qp))
+               mlx4_qp_release_range(dev->dev, qp->mqp.qpn, 1);
+
        mlx4_mtt_cleanup(dev->dev, &qp->mtt);
 
        if (is_user) {