[PATCH net-next 0/8] net: Extend availability of PHY statistics

[Florian Fainelli <f.fainelli@gmail.com>]

Hi all,

This patch series adds support for retrieving PHY statistics with DSA switches
when the CPU port uses a PHY to PHY connection (as opposed to MAC to MAC).
To get there a number of things are done:

- first we move the code dealing with PHY statistics outside of net/core/ethtool.c
  and create helper functions since the same code will be reused
- then we allow network device drivers to provide an ethtool_get_phy_stats callback
  when the standard PHY library helpers are not suitable
- we update the DSA functions dealing with ethtool operations to get passed a
  stringset instead of assuming ETH_SS_STATS like they currently do
- then we provide a set of standard helpers within DSA as a framework and add
  the plumbing to allow retrieving the PHY statistics of the CPU port(s)
- finally plug support for retrieving such PHY statistics with the b53 driver

Changes in v3:

- retrict the b53 change to 539x and 531x5 series of switches
- added a change to dsa_loop.c to help test the feature

Changes in v2:

- got actual testing when the DSA master network device has a PHY that
  already provides statistics (thanks Nikita!)

- fixed the kbuild error reported when CONFIG_PHYLIB=n

- removed the checking of ops which is redundant and not needed

Florian Fainelli (8):
  net: Move PHY statistics code into PHY library helpers
  net: Allow network devices to have PHY statistics
  net: dsa: Do not check for ethtool_ops validity
  net: dsa: Pass stringset to ethtool operations
  net: dsa: Add helper function to obtain PHY device of a given port
  net: dsa: Allow providing PHY statistics from CPU port
  net: dsa: b53: Add support for reading PHY statistics
  net: dsa: loop: Hook PHY statistics

 drivers/net/dsa/b53/b53_common.c       | 81 +++++++++++++++++++++++++++---
 drivers/net/dsa/b53/b53_priv.h         |  6 ++-
 drivers/net/dsa/bcm_sf2.c              |  1 +
 drivers/net/dsa/dsa_loop.c             | 12 ++++-
 drivers/net/dsa/lan9303-core.c         | 11 ++++-
 drivers/net/dsa/microchip/ksz_common.c | 11 ++++-
 drivers/net/dsa/mt7530.c               | 11 ++++-
 drivers/net/dsa/mv88e6xxx/chip.c       | 10 +++-
 drivers/net/dsa/qca8k.c                | 10 +++-
 drivers/net/phy/phy.c                  | 48 ++++++++++++++++++
 include/linux/ethtool.h                |  5 ++
 include/linux/phy.h                    | 20 ++++++++
 include/net/dsa.h                      | 12 ++++-
 net/core/ethtool.c                     | 61 ++++++++---------------
 net/dsa/master.c                       | 62 +++++++++++++++++++----
 net/dsa/port.c                         | 90 +++++++++++++++++++++++++++++-----
 net/dsa/slave.c                        |  5 +-
 17 files changed, 369 insertions(+), 87 deletions(-)

-- 
2.14.1