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Commit 4929116b authored by Kamal Heib's avatar Kamal Heib Committed by Doug Ledford
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RDMA/core: Add common iWARP query port 



Add support for a common iWARP query port function, the new function
includes a common code that is used by the iWARP devices to update the
port attributes like max_mtu, active_mtu, state, and phys_state, the
function also includes a call for the driver-specific query_port callback
to query the device-specific port attributes.

Signed-off-by: default avatarKamal Heib <kamalheib1@gmail.com>
Link: https://lore.kernel.org/r/20190807103138.17219-4-kamalheib1@gmail.com


Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 691f380d

drivers/infiniband/core/device.c

+71 −16
Original line number Diff line number Diff line
@@ -1939,31 +1939,64 @@ void ib_dispatch_event(struct ib_event *event) 
}

EXPORT_SYMBOL(ib_dispatch_event);



/**

 * ib_query_port - Query IB port attributes

 * @device:Device to query

 * @port_num:Port number to query

 * @port_attr:Port attributes

 *

 * ib_query_port() returns the attributes of a port through the

 * @port_attr pointer.

 */

int ib_query_port(struct ib_device *device,

static int iw_query_port(struct ib_device *device,

			   u8 port_num,

			   struct ib_port_attr *port_attr)

{

	union ib_gid gid;

	struct in_device *inetdev;

	struct net_device *netdev;

	int err;



	if (!rdma_is_port_valid(device, port_num))

		return -EINVAL;

	memset(port_attr, 0, sizeof(*port_attr));



	netdev = ib_device_get_netdev(device, port_num);

	if (!netdev)

		return -ENODEV;



	dev_put(netdev);



	port_attr->max_mtu = IB_MTU_4096;

	port_attr->active_mtu = ib_mtu_int_to_enum(netdev->mtu);



	if (!netif_carrier_ok(netdev)) {

		port_attr->state = IB_PORT_DOWN;

		port_attr->phys_state = IB_PORT_PHYS_STATE_DISABLED;

	} else {

		inetdev = in_dev_get(netdev);



		if (inetdev && inetdev->ifa_list) {

			port_attr->state = IB_PORT_ACTIVE;

			port_attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP;

			in_dev_put(inetdev);

		} else {

			port_attr->state = IB_PORT_INIT;

			port_attr->phys_state =

				IB_PORT_PHYS_STATE_PORT_CONFIGURATION_TRAINING;

		}

	}



	err = device->ops.query_port(device, port_num, port_attr);

	if (err)

		return err;



	return 0;

}



static int __ib_query_port(struct ib_device *device,

			   u8 port_num,

			   struct ib_port_attr *port_attr)

{

	union ib_gid gid = {};

	int err;



	memset(port_attr, 0, sizeof(*port_attr));



	err = device->ops.query_port(device, port_num, port_attr);

	if (err || port_attr->subnet_prefix)

		return err;



	if (rdma_port_get_link_layer(device, port_num) != IB_LINK_LAYER_INFINIBAND)

	if (rdma_port_get_link_layer(device, port_num) !=

	    IB_LINK_LAYER_INFINIBAND)

		return 0;



	err = device->ops.query_gid(device, port_num, 0, &gid);
@@ -1973,6 +2006,28 @@ int ib_query_port(struct ib_device *device, 
	port_attr->subnet_prefix = be64_to_cpu(gid.global.subnet_prefix);

	return 0;

}



/**

 * ib_query_port - Query IB port attributes

 * @device:Device to query

 * @port_num:Port number to query

 * @port_attr:Port attributes

 *

 * ib_query_port() returns the attributes of a port through the

 * @port_attr pointer.

 */

int ib_query_port(struct ib_device *device,

		  u8 port_num,

		  struct ib_port_attr *port_attr)

{

	if (!rdma_is_port_valid(device, port_num))

		return -EINVAL;



	if (rdma_protocol_iwarp(device, port_num))

		return iw_query_port(device, port_num, port_attr);

	else

		return __ib_query_port(device, port_num, port_attr);

}

EXPORT_SYMBOL(ib_query_port);



static void add_ndev_hash(struct ib_port_data *pdata)