[PATCH net v3 0/8] net: dsa: b53: Preliminary fixes

[Florian Fainelli <florian.fainelli@broadcom.com>]

This patch series contains fixes to issues reported by Sashiko on the
b53 PCS bug fixes being submitted, and then some more that came from
code review and testing.

Except for issue #2, all of the other issues did trigger in testing and
needed to be corrected.

Changes in v3:

- patch 2: added Daniel's R-b tag
- patch 3: mention in the commit message that deleting an absent entry
  now returns -ENOENT, including when the lookup runs out of space
- patch 4: document that the patch also fixes the clear of the capture
  port field in b53_mirror_del()
- patch 6: reference count the mirror source bits per port and
  direction, ignoring deletions without a matching reference
- patch 7: new, harden mirror register programming:
  - reset the mirror capture and source control registers at setup for
    b53 and bcm_sf2, since not all switches are reset
  - check and propagate all mirror register read/write errors, only
    taking a source reference once hardware programming succeeded
  - use the source masks rather than MIRROR_EN to decide whether the
    destination is occupied, and write the destination before the source
- log failures in b53_mirror_del() since it cannot return an error
- patch 8: new, fix the mirror capture port encoding on BCM5325 and
  BCM5365, which use an 11-bit bitmap (CPU port at bit 8) instead of a
  port ID, and translate the CPU port in the ingress/egress source
  masks as well (verified against the BCM5325E, BCM5325M and BCM5365P
  datasheets)

Changes in v2:

- collected Jonas' R-b tags
- corrected logic in patch #3 to propagate -ENOENT, memset after the
  debug print, translate -ENOSPC to -ENOENT when deleting

Florian Fainelli (8):
  net: dsa: b53: initialize the jumbo frame size register offset
  net: dsa: b53: fix the SRAB grant timeout check
  net: dsa: b53: clear stale state when creating an ARL entry
  net: dsa: b53: reject conflicting mirror destinations
  net: dsa: b53: use the correct override register 2 Gbps bit
  net: dsa: b53: reference count shared mirror source bits
  net: dsa: b53: harden mirror register programming
  net: dsa: b53: fix mirror port encoding on BCM5325 and BCM5365

 drivers/net/dsa/b53/b53_common.c | 183 ++++++++++++++++++++++++-------
 drivers/net/dsa/b53/b53_priv.h   |   3 +
 drivers/net/dsa/b53/b53_regs.h   |   1 +
 drivers/net/dsa/b53/b53_srab.c   |   2 +-
 drivers/net/dsa/bcm_sf2.c        |   5 +
 5 files changed, 152 insertions(+), 42 deletions(-)

-- 
2.53.0