net/mlx4_core: Load higher level modules according to ports type
Mellanox ConnectX architecture is: mlx4_core is the lower level
PCI driver which register on the PCI id, and protocol specific drivers
are depended on it: mlx4_en - for Ethernet and mlx4_ib for Infiniband.
NIC could have multiple ports which can change their type dynamically.
We use the request_module() call to load the relevant protocol driver
when needed: on loading time or at port type change event.
Signed-off-by: Eyal Perry <eyalpe@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 60c9f4f..179d267 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -42,6 +42,7 @@
#include <linux/io-mapping.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
+#include <linux/kmod.h>
#include <linux/mlx4/device.h>
#include <linux/mlx4/doorbell.h>
@@ -650,6 +651,27 @@
return err;
}
+static void mlx4_request_modules(struct mlx4_dev *dev)
+{
+ int port;
+ int has_ib_port = false;
+ int has_eth_port = false;
+#define EN_DRV_NAME "mlx4_en"
+#define IB_DRV_NAME "mlx4_ib"
+
+ for (port = 1; port <= dev->caps.num_ports; port++) {
+ if (dev->caps.port_type[port] == MLX4_PORT_TYPE_IB)
+ has_ib_port = true;
+ else if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
+ has_eth_port = true;
+ }
+
+ if (has_ib_port)
+ request_module_nowait(IB_DRV_NAME);
+ if (has_eth_port)
+ request_module_nowait(EN_DRV_NAME);
+}
+
/*
* Change the port configuration of the device.
* Every user of this function must hold the port mutex.
@@ -681,6 +703,11 @@
}
mlx4_set_port_mask(dev);
err = mlx4_register_device(dev);
+ if (err) {
+ mlx4_err(dev, "Failed to register device\n");
+ goto out;
+ }
+ mlx4_request_modules(dev);
}
out:
@@ -2305,6 +2332,8 @@
if (err)
goto err_port;
+ mlx4_request_modules(dev);
+
mlx4_sense_init(dev);
mlx4_start_sense(dev);