[PATCH net-next v3 0/5] Expose more port stats to ethtool

[Eric Joyner <eric.joyner@amd.com>]

Newer hardware collects a lot more FEC statistics than older hardware;
these include FEC histograms and corrected/uncorrected word and bit
totals. This patchset adds plumbing to pass these through to ethtool
along with another link_down_count stat that is another port-level stat.
That link_down_count was already being sent to the driver by the
firmware; it just wasn't used.

Brett's patch is a small unrelated improvement to devcmd handling that's
still nice to have and will help enable deferred probe functionality.

---
v3:
Address issues mostly found by Sashiko:
- Fix potential return of uninitialized variable in __ionic_dev_cmd_wait()
- Fix bounds of wait in __ionic_dev_cmd_wait() to prevent function from
  giving up prematurely now that the wait period has changed
- Add NULL check to ionic_get_link_ext_stats(), following the example set by
  ionic_get_link_ksettings()
- Add missing le16_to_cpu() when copying link_down_count from firmware

v2:
- Add missing cpu_to_le64() to FEC histogram stat assignment
- Remove unused pb_stats field that's replaced by the new FEC/extra stats
- Replace ethtool ext link stat with firmware stat instead of adding
  the firmware stat to general ethtool statistics; remove old driver
  calculated stat
- Add explanation for what EAGAIN return value could be used for in
  commit message

Brett Creeley (1):
  ionic: Small improvements in devcmd retry logic

Eric Joyner (4):
  ionic: Get "link_down_count" ext link stat from firmware
  ionic: Update ionic_if.h with new extra port stats structure
  ionic: Report rx_bits_phy stat to ethtool
  ionic: Add .get_fec_stats ethtool handler

 .../ethernet/pensando/ionic/ionic_ethtool.c   | 63 ++++++++++++++++++-
 .../net/ethernet/pensando/ionic/ionic_if.h    | 36 +++--------
 .../net/ethernet/pensando/ionic/ionic_lif.c   |  1 -
 .../net/ethernet/pensando/ionic/ionic_lif.h   |  1 -
 .../net/ethernet/pensando/ionic/ionic_main.c  | 11 +++-
 .../net/ethernet/pensando/ionic/ionic_stats.c | 15 ++++-
 6 files changed, 93 insertions(+), 34 deletions(-)


base-commit: 8c699be3dad7bba87cdda485dc099226cfc2f706
-- 
2.17.1