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[Qemu-devel] [PATCH v2 00/10] rocker: add new rocker ethernet switch dev


From: sfeldma
Subject: [Qemu-devel] [PATCH v2 00/10] rocker: add new rocker ethernet switch device
Date: Mon, 5 Jan 2015 18:24:51 -0800

From: Scott Feldman <address@hidden>

v2:

 - Address reg_guide.txt review comments from Eric Blake
 - Address QMP review comments from Eric Blake

v1:

[This is a collaboration between myself and Jiri Pirko].

This patch set adds a new ethernet switch device, called rocker.  Rocker is
intended to emulate HW features of switch ASICs found in today's
data-center-class switch/routers.  The original motivation in creating a new
device is to accelerate device driver development for ethernet switches in the
Linux kernel.  A device driver for rocker already exists in the Linux 3.18
kernel and loads against this device.  Basic L2 switching (bridging)
functionality is offloaded to the device.  Work continues to enable offloading
of L3 routing functions and ACLs, as well as support for a flow-based modes,
such as OpenVSwitch with OpenFlow.  Future support for terminating L2-over-L3
tunnels is also planned.

The core network processing functions are based on the spec of a real device:
Broadcom's OF-DPA.  Specifically, rocker borrows OF-DPA's network processing
pipeline comprised of flow match and action tables.  Only the OF-DPA spec was
used in constructing rocker.  The rocker developers do not have access to the
real OF-DPA's software source code, so this is a clean-room, ground-up
development.

Each rocker device is a PCI device with a memory-mapped register space and
MSI-X interrupts for command and event processing, as well as CPU-bound I/O.
Each device can support up to 62 "front-panel" ports, which present themselves
as -netdev attachment points.  The device is programmed using OF-DPA flow and
group tables to setup the flow pipeline.  The programming defines the
forwarding path for packets ingressing on 'front-panel' ports.  The forwarding
path can look at L2/L3/L4 packet header to forward the packet to its
destination.  For the performance path, packets would ingress and egress only
on the device, and not be passed up to the device driver (or host OS).  The
slow path for control packets will forward packets to the CPU via the device
driver for host OS processing.

A QMP/HMP interface is added to give inside into the device's internal port
configuration and flow/group tables.

A test directory is included with some basic sanity tests to verify the device
and driver.

Scott Feldman (10):
  pci: move REDHAT_SDHCI device ID to make room for Rocker
  net: add MAC address string printer
  virtio-net: use qemu_mac_strdup_printf
  rocker: add register programming guide
  pci: add rocker device ID
  pci: add network device class 'other' for network switches
  rocker: add new rocker switch device
  qmp: add rocker device support
  rocker: add tests
  MAINTAINERS: add rocker

 MAINTAINERS                        |    6 +
 default-configs/pci.mak            |    1 +
 docs/specs/pci-ids.txt             |    3 +-
 hmp-commands.hx                    |   56 +
 hmp.c                              |  303 +++++
 hmp.h                              |    4 +
 hw/net/Makefile.objs               |    3 +
 hw/net/rocker/reg_guide.txt        |  961 +++++++++++++
 hw/net/rocker/rocker.c             | 1440 ++++++++++++++++++++
 hw/net/rocker/rocker.h             |   76 ++
 hw/net/rocker/rocker_desc.c        |  379 ++++++
 hw/net/rocker/rocker_desc.h        |   57 +
 hw/net/rocker/rocker_fp.c          |  243 ++++
 hw/net/rocker/rocker_fp.h          |   54 +
 hw/net/rocker/rocker_hw.h          |  475 +++++++
 hw/net/rocker/rocker_of_dpa.c      | 2644 ++++++++++++++++++++++++++++++++++++
 hw/net/rocker/rocker_of_dpa.h      |   25 +
 hw/net/rocker/rocker_tlv.h         |  247 ++++
 hw/net/rocker/rocker_world.c       |  108 ++
 hw/net/rocker/rocker_world.h       |   63 +
 hw/net/rocker/test/README          |    5 +
 hw/net/rocker/test/all             |   19 +
 hw/net/rocker/test/bridge          |   43 +
 hw/net/rocker/test/bridge-stp      |   52 +
 hw/net/rocker/test/bridge-vlan     |   52 +
 hw/net/rocker/test/bridge-vlan-stp |   64 +
 hw/net/rocker/test/port            |   22 +
 hw/net/rocker/test/tut.dot         |    8 +
 hw/net/virtio-net.c                |   12 +-
 include/hw/pci/pci.h               |    3 +-
 include/hw/pci/pci_ids.h           |    1 +
 include/net/net.h                  |    1 +
 net/net.c                          |    7 +
 qapi-schema.json                   |    3 +
 qapi/rocker.json                   |  249 ++++
 qmp-commands.hx                    |   97 ++
 36 files changed, 7775 insertions(+), 11 deletions(-)
 create mode 100644 hw/net/rocker/reg_guide.txt
 create mode 100644 hw/net/rocker/rocker.c
 create mode 100644 hw/net/rocker/rocker.h
 create mode 100644 hw/net/rocker/rocker_desc.c
 create mode 100644 hw/net/rocker/rocker_desc.h
 create mode 100644 hw/net/rocker/rocker_fp.c
 create mode 100644 hw/net/rocker/rocker_fp.h
 create mode 100644 hw/net/rocker/rocker_hw.h
 create mode 100644 hw/net/rocker/rocker_of_dpa.c
 create mode 100644 hw/net/rocker/rocker_of_dpa.h
 create mode 100644 hw/net/rocker/rocker_tlv.h
 create mode 100644 hw/net/rocker/rocker_world.c
 create mode 100644 hw/net/rocker/rocker_world.h
 create mode 100644 hw/net/rocker/test/README
 create mode 100755 hw/net/rocker/test/all
 create mode 100755 hw/net/rocker/test/bridge
 create mode 100755 hw/net/rocker/test/bridge-stp
 create mode 100755 hw/net/rocker/test/bridge-vlan
 create mode 100755 hw/net/rocker/test/bridge-vlan-stp
 create mode 100755 hw/net/rocker/test/port
 create mode 100644 hw/net/rocker/test/tut.dot
 create mode 100644 qapi/rocker.json

-- 
1.7.10.4




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