IB/mlx4: Create paravirt contexts for VFs when master IB driver initializes

When we have VFs and PFs on same host, the VFs are activated within
the mlx4_core module before the mlx4_ib kernel module is loaded.

When the mlx4_ib module initializes the PF (master), it now creates
MAD paravirtualization contexts for any VFs that already active.

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

2 files changed, 14 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c
index 658a622791fb..21a794152d15 100644
--- a/drivers/infiniband/hw/mlx4/mad.c
+++ b/drivers/infiniband/hw/mlx4/mad.c
@@ -1652,6 +1652,9 @@ static int create_pv_resources(struct ib_device *ibdev, int slave, int port,
 {
         int ret, cq_size;
 
+        if (ctx->state != DEMUX_PV_STATE_DOWN)
+                return -EEXIST;
+
         ctx->state = DEMUX_PV_STATE_STARTING;
         /* have QP0 only on port owner, and only if link layer is IB */
         if (ctx->slave == mlx4_master_func_num(to_mdev(ctx->ib_dev)->dev) &&
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index e849347ef99a..718ec6b2bad2 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -74,6 +74,8 @@ struct update_gid_work {
         int                     port;
 };
 
+static void do_slave_init(struct mlx4_ib_dev *ibdev, int slave, int do_init);
+
 static struct workqueue_struct *wq;
 
 static void init_query_mad(struct ib_smp *mad)
@@ -1470,6 +1472,15 @@ static void *mlx4_ib_add(struct mlx4_dev *dev)
         if (mlx4_is_mfunc(ibdev->dev))
                 init_pkeys(ibdev);
 
+        /* create paravirt contexts for any VFs which are active */
+        if (mlx4_is_master(ibdev->dev)) {
+                for (j = 0; j < MLX4_MFUNC_MAX; j++) {
+                        if (j == mlx4_master_func_num(ibdev->dev))
+                                continue;
+                        if (mlx4_is_slave_active(ibdev->dev, j))
+                                do_slave_init(ibdev, j, 1);
+                }
+        }
         return ibdev;
 
 err_notif: