Commit 4929116b authored by Kamal Heib's avatar Kamal Heib Committed by Doug Ledford

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.comSigned-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 691f380d
......@@ -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,
u8 port_num,
struct ib_port_attr *port_attr)
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)
......
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