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Date: Fri, 26 Feb 2016 17:32:22 +0100
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, idosch@...lanox.com, eladr@...lanox.com,
yotamg@...lanox.com, ogerlitz@...lanox.com, yishaih@...lanox.com,
dledford@...hat.com, sean.hefty@...el.com,
hal.rosenstock@...il.com, eugenia@...lanox.com,
roopa@...ulusnetworks.com, nikolay@...ulusnetworks.com,
hadarh@...lanox.com, jhs@...atatu.com, john.fastabend@...il.com,
jeffrey.t.kirsher@...el.com, brouer@...hat.com, ivecera@...hat.com,
rami.rosen@...el.com, hannes@...essinduktion.org,
gospo@...ulusnetworks.com
Subject: [patch net-next v3 0/9] Introduce devlink interface and first drivers to use it
From: Jiri Pirko <jiri@...lanox.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
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