From: Jiri Pirko <j...@mellanox.com> There a is need for some userspace API that would allow to expose things that are not directly related to any device class like net_device of ib_device, but rather chip-wide/switch-ASIC-wide stuff.
Use cases: 1) get/set of port type (Ethernet/InfiniBand) 2) setting up port splitters - split port into multiple ones and squash again, enables usage of splitter cable 3) setting up shared buffers - shared among multiple ports within one chip (work in progress) 4) configuration of switch wide properties - resources division etc - This will allow to pass configuration that is unacceptable to be passed as a module option. First patch of this set introduces a new generic Netlink based interface, called "devlink". It is similar to nl80211 model and it is heavily influenced by it, including the API definition. The devlink introduction patch implements use cases 1) and 2). Other 2 are in development atm and will be addressed by follow-ups. It is very convenient for drivers to use devlink, as you can see in other patches in this set. Counterpart for devlink is userspace tool for now called "dl". Command line interface and outputs are derived from "ip" tool so it should be easy for users to get used to it. It is available here as a standalone tool for now: https://github.com/jpirko/devlink After this is merge in kernel, I will include the "dl" or "devlink" tool into iproute2 toolset. Port type setting example: myhost:~$ dl help Usage: dl [ OPTIONS ] OBJECT { COMMAND | help } where OBJECT := { dev | port | monitor } OPTIONS := { -v/--verbose } myhost:~$ dl dev help Usage: dl dev show [DEV] myhost:~$ dl dev show pci/0000:01:00.0 myhost:~$ dl port help Usage: dl port show [DEV/PORT_INDEX] Usage: dl port set DEV/PORT_INDEX [ type { eth | ib | auto} ] Usage: dl port split DEV/PORT_INDEX count Usage: dl port unsplit DEV/PORT_INDEX myhost:~$ dl port show pci/0000:01:00.0/1: type ib ibdev mlx4_0 pci/0000:01:00.0/2: type ib ibdev mlx4_0 myhost:~$ sudo dl port set pci/0000:01:00.0/1 type eth myhost:~$ dl port show pci/0000:01:00.0/1: type eth netdev ens4 pci/0000:01:00.0/2: type ib ibdev mlx4_0 myhost:~$ sudo dl port set ens4 type auto myhost:~$ dl port show pci/0000:01:00.0/1: type eth(auto) netdev ens4 pci/0000:01:00.0/2: type ib ibdev mlx4_0 Port splitting example: myswitch:~$ sudo modprobe mlxsw_pci myswitch:~$ dl port pci/0000:03:00.0/1: type eth netdev eth0 pci/0000:03:00.0/3: type eth netdev eth1 pci/0000:03:00.0/5: type eth netdev eth2 ... pci/0000:03:00.0/63: type eth netdev eth31 myswitch:~$ sudo dl port split pci/0000:03:00.0/1 2 (or "sudo dl port split eth0 2") myswitch:~$ dl port pci/0000:03:00.0/3: type eth netdev eth1 pci/0000:03:00.0/5: type eth netdev eth2 ... pci/0000:03:00.0/63: type eth netdev eth31 pci/0000:03:00.0/1: type eth netdev eth0 split_group 16 pci/0000:03:00.0/2: type eth netdev eth32 split_group 16 myswitch:~$ sudo dl port unsplit pci/0000:03:00.0/1 myswitch:~$ dl port pci/0000:03:00.0/3: type eth netdev eth1 pci/0000:03:00.0/5: type eth netdev eth2 pci/0000:03:00.0/63: type eth netdev eth31 pci/0000:03:00.0/1: type eth netdev eth0 --- v2->v3: patch 1/9 -removed generated devlink index and name, use bus name and dev name as a handle for all userspace originated commands. Along with that, remove sysfs stub. Requested by Hannes Sowa. patch 2/9 -add dev param to devlink_register (api change) patch 4/9 -add dev param to devlink_register (api change) patch 9/9 -set port's speed according to width fix by Ido v1->v2: patch 1/9 -removed no longer used "devlink_dev" helper -fix couple of typos and misspells patch 4/9: -removed SET_NETDEV_DEV set to devlink dev Ido Schimmel (4): mlxsw: spectrum: Unmap local port from module during teardown mlxsw: spectrum: Store local port to module mapping during init mlxsw: spectrum: Mark unused ports using NULL mlxsw: spectrum: Introduce port splitting Jiri Pirko (5): Introduce devlink infrastructure mlx4: Implement devlink interface mlx4: Implement port type setting via devlink interface mlxsw: Implement devlink interface mlxsw: core: Add devlink port splitter callbacks MAINTAINERS | 8 + drivers/infiniband/hw/mlx4/main.c | 7 + drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 8 +- drivers/net/ethernet/mellanox/mlx4/intf.c | 9 + drivers/net/ethernet/mellanox/mlx4/main.c | 128 +++-- drivers/net/ethernet/mellanox/mlx4/mlx4.h | 2 + drivers/net/ethernet/mellanox/mlxsw/core.c | 55 +- drivers/net/ethernet/mellanox/mlxsw/core.h | 2 + drivers/net/ethernet/mellanox/mlxsw/port.h | 2 + drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 272 ++++++++- drivers/net/ethernet/mellanox/mlxsw/spectrum.h | 10 +- drivers/net/ethernet/mellanox/mlxsw/switchx2.c | 20 + include/linux/mlx4/driver.h | 3 + include/net/devlink.h | 140 +++++ include/uapi/linux/devlink.h | 72 +++ net/Kconfig | 7 + net/core/Makefile | 1 + net/core/devlink.c | 738 +++++++++++++++++++++++++ 18 files changed, 1425 insertions(+), 59 deletions(-) create mode 100644 include/net/devlink.h create mode 100644 include/uapi/linux/devlink.h create mode 100644 net/core/devlink.c -- 2.5.0
