RDMA/device: Add ib_device_get_by_netdev()

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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>

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This commit is contained in:

Jason Gunthorpe 2019-02-12 21:12:51 -07:00

parent c2261dd76b

commit 324e227ea7

2 changed files with 116 additions and 13 deletions

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119

drivers/infiniband/core/device.c

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10

include/rdma/ib_verbs.h

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