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    {net, IB}/mlx5: Manage port association for multiport RoCE · 32f69e4b
    Daniel Jurgens 提交于
    When mlx5_ib_add is called determine if the mlx5 core device being
    added is capable of dual port RoCE operation. If it is, determine
    whether it is a master device or a slave device using the
    num_vhca_ports and affiliate_nic_vport_criteria capabilities.
    
    If the device is a slave, attempt to find a master device to affiliate it
    with. Devices that can be affiliated will share a system image guid. If
    none are found place it on a list of unaffiliated ports. If a master is
    found bind the port to it by configuring the port affiliation in the NIC
    vport context.
    
    Similarly when mlx5_ib_remove is called determine the port type. If it's
    a slave port, unaffiliate it from the master device, otherwise just
    remove it from the unaffiliated port list.
    
    The IB device is registered as a multiport device, even if a 2nd port is
    not available for affiliation. When the 2nd port is affiliated later the
    GID cache must be refreshed in order to get the default GIDs for the 2nd
    port in the cache. Export roce_rescan_device to provide a mechanism to
    refresh the cache after a new port is bound.
    
    In a multiport configuration all IB object (QP, MR, PD, etc) related
    commands should flow through the master mlx5_core_dev, other commands
    must be sent to the slave port mlx5_core_mdev, an interface is provide
    to get the correct mdev for non IB object commands.
    Signed-off-by: NDaniel Jurgens <danielj@mellanox.com>
    Reviewed-by: NParav Pandit <parav@mellanox.com>
    Signed-off-by: NLeon Romanovsky <leon@kernel.org>
    Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>
    32f69e4b
driver.h 32.2 KB