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| author | Jason Gunthorpe <jgg@mellanox.com> | 2019-02-13 05:12:51 +0100 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-02-20 04:52:18 +0100 |
| commit | 324e227ea7c952626abafe72db42ae0d70220a6e (patch) | |
| tree | 5e0a306788204bfb58ff927c18fb242e81daa1fc /include/rdma | |
| parent | RDMA/device: Add ib_device_set_netdev() as an alternative to get_netdev (diff) | |
| download | linux-324e227ea7c952626abafe72db42ae0d70220a6e.tar.xz linux-324e227ea7c952626abafe72db42ae0d70220a6e.zip | |
RDMA/device: Add ib_device_get_by_netdev()
Several drivers need to find the ib_device from a given netdev. rxe needs
this at speed in an unsleepable context, so choose to implement the
translation using a RCU safe hash table.
The hash table can have a many to one mapping. This is intended to support
some future case where multiple IB drivers (ie iWarp and RoCE) connect to
the same netdevs. driver_ids will need to be different to support this.
In the process this makes the struct ib_device and ib_port_data RCU safe
by deferring their kfrees.
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'include/rdma')
| -rw-r--r-- | include/rdma/ib_verbs.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 7f81a313c01b..3aa802b65cf3 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -2198,6 +2198,8 @@ struct ib_port_immutable { }; struct ib_port_data { + struct ib_device *ib_dev; + struct ib_port_immutable immutable; spinlock_t pkey_list_lock; @@ -2206,7 +2208,8 @@ struct ib_port_data { struct ib_port_cache cache; spinlock_t netdev_lock; - struct net_device *netdev; + struct net_device __rcu *netdev; + struct hlist_node ndev_hash_link; }; /* rdma netdev type - specifies protocol type */ @@ -2545,6 +2548,7 @@ struct ib_device { struct device *dma_device; struct ib_device_ops ops; char name[IB_DEVICE_NAME_MAX]; + struct rcu_head rcu_head; struct list_head event_handler_list; spinlock_t event_handler_lock; @@ -3996,6 +4000,10 @@ static inline bool ib_device_try_get(struct ib_device *dev) } void ib_device_put(struct ib_device *device); +struct ib_device *ib_device_get_by_netdev(struct net_device *ndev, + enum rdma_driver_id driver_id); +struct ib_device *ib_device_get_by_name(const char *name, + enum rdma_driver_id driver_id); struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, u8 port, u16 pkey, const union ib_gid *gid, const struct sockaddr *addr); |