>From Daniel:
This feature allows RDMA resources (pd, mr, cq, qp, etc) to be used with
both physical ports of capable mlx5 devices. When enabled a single IB
device with two ports will be registered instead of two single port
devices.
There are still two PCI devices underlying the two port device, the
capabilities indicate which device is the "master" device and which is
the slave.
When the add callback function is called for a slave device a list of IB
devices is searched for matching master device, indicated by the capabilities
and the system_image_guid. If a match is found the slave is bound to the
master device, otherwise it's placed on a list, in case it's master becomes
available in the future. When a master device is added it searches the list
of available slaves for a matching slave device. If a match is found it binds
the slave as its 2nd port. If no match as found the device still appears
as a dual port device, with the 2nd port down. RDMA resources can still
created that use the yet unavailable 2nd port.
Commands related to IB resources are all routed through the master mlx5_core
device. Port specific commands, like those for hardware counters are routed to
their respective port mlx5_core device. Since devices can appear and disappear
asynchronously a reference count on the underlying mlx5_core device is
maintained. Getting and putting this reference is only necessary for commands
destined to a specific port, the master core device can be used freely,
as it will exist while the IB device exists.
SR-IOV devices follow the same pattern as the physical ones. VFs of a master
port can bind VFs of slave ports, if available, and operate as dual port
devices.
The patches are available in the git repository at:
git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git tags/rdma-next-2017-12-24-2
Thanks
---------------------------------------
Daniel Jurgens (14):
net/mlx5: Fix race for multiple RoCE enable
net/mlx5: Set software owner ID during init HCA
IB/core: Change roce_rescan_device to return void
IB/mlx5: Reduce the use of num_port capability
IB/mlx5: Make netdev notifications multiport capable
{net,IB}/mlx5: Manage port association for multiport RoCE
IB/mlx5: Move IB event processing onto a workqueue
IB/mlx5: Implement dual port functionality in query routines
IB/mlx5: Update counter implementation for dual port RoCE
{net,IB}/mlx5: Change set_roce_gid to take a port number
IB/mlx5: Route MADs for dual port RoCE
IB/mlx5: Use correct mdev for vport queries in ib_virt
IB/mlx5: Don't advertise RAW QP support in dual port mode
net/mlx5: Set num_vhca_ports capability
Parav Pandit (1):
IB/mlx5: Change debugfs to have per port contents
drivers/infiniband/core/cache.c | 7 +-
drivers/infiniband/core/core_priv.h | 1 -
drivers/infiniband/core/roce_gid_mgmt.c | 13 +-
drivers/infiniband/hw/mlx5/cong.c | 83 ++-
drivers/infiniband/hw/mlx5/ib_virt.c | 84 ++-
drivers/infiniband/hw/mlx5/mad.c | 23 +-
drivers/infiniband/hw/mlx5/main.c | 791 +++++++++++++++++----
drivers/infiniband/hw/mlx5/mlx5_ib.h | 41 +-
drivers/infiniband/hw/mlx5/qp.c | 8 +-
.../net/ethernet/mellanox/mlx5/core/fpga/conn.c | 11 +-
drivers/net/ethernet/mellanox/mlx5/core/fw.c | 10 +-
.../net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c | 2 +-
drivers/net/ethernet/mellanox/mlx5/core/lib/gid.c | 5 +-
drivers/net/ethernet/mellanox/mlx5/core/main.c | 12 +-
.../net/ethernet/mellanox/mlx5/core/mlx5_core.h | 2 +-
drivers/net/ethernet/mellanox/mlx5/core/vport.c | 91 ++-
include/linux/mlx5/device.h | 5 +
include/linux/mlx5/driver.h | 29 +-
include/linux/mlx5/mlx5_ifc.h | 32 +-
include/linux/mlx5/vport.h | 4 +
include/rdma/ib_verbs.h | 8 +
21 files changed, 1037 insertions(+), 225 deletions(-)
--
2.15.1
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