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RDMA/core: Add common iWARP query port

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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: Kamal Heib <kamalheib1@gmail.com>
Link: https://lore.kernel.org/r/20190807103138.17219-4-kamalheib1@gmail.com
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Kamal Heib 2019-08-07 13:31:37 +03:00 committed by Doug Ledford
parent 691f380df2
commit 4929116bdf
1 changed files with 72 additions and 17 deletions
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89
drivers/infiniband/core/device.c
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@ -1939,6 +1939,74 @@ void ib_dispatch_event(struct ib_event *event)
} }
EXPORT_SYMBOL(ib_dispatch_event); EXPORT_SYMBOL(ib_dispatch_event);
static int iw_query_port(struct ib_device *device,
u8 port_num,
struct ib_port_attr *port_attr)
{
struct in_device *inetdev;
struct net_device *netdev;
int err;
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)
return 0;
err = device->ops.query_gid(device, port_num, 0, &gid);
if (err)
return err;
port_attr->subnet_prefix = be64_to_cpu(gid.global.subnet_prefix);
return 0;
}
/** /**
* ib_query_port - Query IB port attributes * ib_query_port - Query IB port attributes
* @device:Device to query * @device:Device to query
@ -1952,26 +2020,13 @@ int ib_query_port(struct ib_device *device,
u8 port_num, u8 port_num,
struct ib_port_attr *port_attr) struct ib_port_attr *port_attr)
{ {
union ib_gid gid;
int err;
if (!rdma_is_port_valid(device, port_num)) if (!rdma_is_port_valid(device, port_num))
return -EINVAL; return -EINVAL;
memset(port_attr, 0, sizeof(*port_attr)); if (rdma_protocol_iwarp(device, port_num))
err = device->ops.query_port(device, port_num, port_attr); return iw_query_port(device, port_num, port_attr);
if (err || port_attr->subnet_prefix) else
return err; return __ib_query_port(device, port_num, port_attr);
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);
if (err)
return err;
port_attr->subnet_prefix = be64_to_cpu(gid.global.subnet_prefix);
return 0;
} }
EXPORT_SYMBOL(ib_query_port); EXPORT_SYMBOL(ib_query_port);