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Octeontx2-af: Broadcast XON on all channels

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[ Upstream commit a7bd721580 ]

The NIX block receives traffic from multiple channels, including:

MAC block (RPM)
Loopback module (LBK)
CPT block

                     RPM
                      |
                -----------------
       LBK   --|     NIX         |
                -----------------
                     |
                    CPT

Due to a hardware errata,  CN10k and earlier Octeon silicon series,
the hardware may incorrectly assert XOFF on certain channels during
reset. As a workaround, a write operation to the NIX_AF_RX_CHANX_CFG
register can be performed to broadcast XON signals on the affected
channels

Signed-off-by: Hariprasad Kelam <hkelam@marvell.com>
Link: https://patch.msgid.link/20250820064625.1464361-1-hkelam@marvell.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hariprasad Kelam 2025-08-20 12:16:25 +05:30 • committed by Greg Kroah-Hartman
commit 7d273f77c9
3 changed files with 20 additions and 0 deletions
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