diff options
| author |   Eli Cohen <eli@mellanox.com> | 2016-03-11 22:58:36 +0200 |
|---|---|---|
| committer |   Doug Ledford <dledford@redhat.com> | 2016-03-21 16:34:06 -0400 |
| commit | fad61ad4e755f5dd13c7702a87cd907207392534 (patch) | |
| tree | a8f2df35c806be02cc3353abab8b6df956e83654 /drivers/infiniband/core/device.c | |
| parent | IB/mlx5: Fix decision on using MAD_IFC (diff) | |
| download | linux-dev-fad61ad4e755f5dd13c7702a87cd907207392534.tar.xz linux-dev-fad61ad4e755f5dd13c7702a87cd907207392534.zip | |
IB/core: Add subnet prefix to port info
The subnet prefix is a part of the port_info MAD returned and should be
available at the ib_port_attr struct. We define it here and provide a
default implementation in case the hardware driver does not provide one.
The subnet prefix is required when creating the address vector to access
the SA in networks where GRH must be used.
Signed-off-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/core/device.c')
| -rw-r--r-- | drivers/infiniband/core/device.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c index 270c7ff6cba7..10979844026a 100644 --- a/drivers/infiniband/core/device.c +++ b/drivers/infiniband/core/device.c @@ -650,10 +650,23 @@ int ib_query_port(struct ib_device *device, u8 port_num, struct ib_port_attr *port_attr) { + union ib_gid gid; + int err; + if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device)) return -EINVAL; - return device->query_port(device, port_num, port_attr); + memset(port_attr, 0, sizeof(*port_attr)); + err = device->query_port(device, port_num, port_attr); + if (err || port_attr->subnet_prefix) + return err; + + err = ib_query_gid(device, port_num, 0, &gid, NULL); + if (err) + return err; + + port_attr->subnet_prefix = be64_to_cpu(gid.global.subnet_prefix); + return 0; } EXPORT_SYMBOL(ib_query_port); |