mlx4_core: Allow protocol drivers to find corresponding interfaces
Add a mechanism for mlx4 protocol drivers to get a pointer to other
drivers's device objects. For this, an exported function,
mlx4_get_protocol_dev() is added, which allows a driver to get some
other driver's device based on the protocol that the driver
implements. Two protocols are added: MLX4_PROTOCOL_IB and
MLX4_PROTOCOL_EN.
This will be used in mlx4 IBoE support so that mlx4_ib can find the
corresponding mlx4_en netdev.
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
[ Clean up and rename a few things. - Roland ]
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/net/mlx4/intf.c b/drivers/net/mlx4/intf.c
index 5550678..73c94fc 100644
--- a/drivers/net/mlx4/intf.c
+++ b/drivers/net/mlx4/intf.c
@@ -161,3 +161,24 @@
mutex_unlock(&intf_mutex);
}
+
+void *mlx4_get_protocol_dev(struct mlx4_dev *dev, enum mlx4_protocol proto, int port)
+{
+ struct mlx4_priv *priv = mlx4_priv(dev);
+ struct mlx4_device_context *dev_ctx;
+ unsigned long flags;
+ void *result = NULL;
+
+ spin_lock_irqsave(&priv->ctx_lock, flags);
+
+ list_for_each_entry(dev_ctx, &priv->ctx_list, list)
+ if (dev_ctx->intf->protocol == proto && dev_ctx->intf->get_dev) {
+ result = dev_ctx->intf->get_dev(dev, dev_ctx->context, port);
+ break;
+ }
+
+ spin_unlock_irqrestore(&priv->ctx_lock, flags);
+
+ return result;
+}
+EXPORT_SYMBOL_GPL(mlx4_get_protocol_dev);