net: mvpp2: Add TCAM entry to drop flow control pause frames

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[ Upstream commit 3f48fab62b ]

Issue:
Flow control frame used to pause GoP(MAC) was delivered to the CPU
and created a load on the CPU. Since XOFF/XON frames are used only
by MAC, these frames should be dropped inside MAC.

Fix:
According to 802.3-2012 - IEEE Standard for Ethernet pause frame
has unique destination MAC address 01-80-C2-00-00-01.
Add TCAM parser entry to track and drop pause frames by destination MAC.

Fixes: 3f518509de ("ethernet: Add new driver for Marvell Armada 375 network unit")
Signed-off-by: Stefan Chulski <stefanc@marvell.com>
Link: https://lore.kernel.org/r/1608229817-21951-1-git-send-email-stefanc@marvell.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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This commit is contained in:

Stefan Chulski 2020-12-17 20:30:17 +02:00 • committed by Greg Kroah-Hartman

parent db8895aa58

commit 121164dc33

2 changed files with 34 additions and 1 deletions

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33

drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c

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2

drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.h

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