linux-kernel - [PATCH net-next v3 00/14] net: dsa: b53: fix BCM5325 support

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Message-Id: <20250612083747.26531-1-noltari@gmail.com>
Date: Thu, 12 Jun 2025 10:37:33 +0200
From: Álvaro Fernández Rojas <noltari@...il.com>
To: jonas.gorski@...il.com,
	florian.fainelli@...adcom.com,
	andrew@...n.ch,
	olteanv@...il.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	horms@...nel.org,
	vivien.didelot@...il.com,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	dgcbueu@...il.com
Cc: Álvaro Fernández Rojas <noltari@...il.com>
Subject: [PATCH net-next v3 00/14] net: dsa: b53: fix BCM5325 support

These patches get the BCM5325 switch working with b53.

The existing brcm legacy tag only works with BCM63xx switches.
We need to add a new legacy tag for BCM5325 and BCM5365 switches, which
require including the FCS and length.

I'm not really sure that everything here is correct since I don't work for
Broadcom and all this is based on the public datasheet available for the
BCM5325 and my own experiments with a Huawei HG556a (BCM6358).

Both sets of patches have been merged due to the change requested by Jonas
about BRCM_HDR register access depending on legacy tags.

 v3: introduce changes requested by Florian, Jonas and Jakub:
  - Improve brcm legacy tag Kconfig description, use __le32 and crc32_le().
  - Detect BCM5325 variants as requested by Florian.
  - B53_VLAN_ID_IDX exists in newer BCM5325E switches.
  - Check for legacy tag protocols instead of is5325() for B53_BRCM_HDR.
  - Use in_range() helper for B53_PD_MODE_CTRL_25.

 v2: introduce changes requested by Jonas, Florian and Vladimir:
  - Add b53_arl_to_entry_25 function.
  - Add b53_arl_from_entry_25 function.
  - Add b53_arl_read_25 function, fixing usage of ARLTBL_VALID_25 and
    ARLTBL_VID_MASK_25.
  - Change b53_set_forwarding function flow.
  - Disallow BR_LEARNING on b53_br_flags_pre() for BCM5325.
  - Drop rate control registers.
  - Move B53_PD_MODE_CTRL_25 to b53_setup_port().
  - Replace swab32() with cpu_to_le32().

Florian Fainelli (1):
  net: dsa: b53: add support for FDB operations on 5325/5365

Álvaro Fernández Rojas (13):
  net: dsa: tag_brcm: legacy: reorganize functions
  net: dsa: tag_brcm: add support for legacy FCS tags
  net: dsa: b53: support legacy FCS tags
  net: dsa: b53: detect BCM5325 variants
  net: dsa: b53: prevent FAST_AGE access on BCM5325
  net: dsa: b53: prevent SWITCH_CTRL access on BCM5325
  net: dsa: b53: fix IP_MULTICAST_CTRL on BCM5325
  net: dsa: b53: prevent DIS_LEARNING access on BCM5325
  net: dsa: b53: prevent BRCM_HDR access on older devices
  net: dsa: b53: prevent GMII_PORT_OVERRIDE_CTRL access on BCM5325
  net: dsa: b53: fix unicast/multicast flooding on BCM5325
  net: dsa: b53: fix b53_imp_vlan_setup for BCM5325
  net: dsa: b53: ensure BCM5325 PHYs are enabled

 drivers/net/dsa/b53/Kconfig      |   1 +
 drivers/net/dsa/b53/b53_common.c | 296 ++++++++++++++++++++++++-------
 drivers/net/dsa/b53/b53_priv.h   |  45 ++++-
 drivers/net/dsa/b53/b53_regs.h   |  24 ++-
 include/net/dsa.h                |   2 +
 net/dsa/Kconfig                  |  16 +-
 net/dsa/tag_brcm.c               | 119 ++++++++++---
 7 files changed, 409 insertions(+), 94 deletions(-)

-- 
2.39.5