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From: Subbaraya Sundeep <sbhatta@marvell.com>
To: <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>
CC: <davem@davemloft.net>, <edumazet@google.com>, <kuba@kernel.org>,
        <pabeni@redhat.com>, <sgoutham@marvell.com>, <lcherian@marvell.com>,
        <gakula@marvell.com>, <hkelam@marvell.com>, <naveenm@marvell.com>,
        <horms@kernel.org>, Subbaraya Sundeep <sbhatta@marvell.com>
Subject: [PATCH net] octeontx2-af: Consider the action set by PF
Date: Mon, 19 Feb 2024 18:25:14 +0530
Message-ID: <1708347314-21624-1-git-send-email-sbhatta@marvell.com>
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AF reserves MCAM entries for each PF, VF present in the
system and populates the entry with DMAC and action with
default RSS so that basic packet I/O works. Since PF/VF is
not aware of the RSS action installed by AF, AF only fixup
the actions of the rules installed by PF/VF with corresponding
default RSS action. This worked well for rules installed by
PF/VF for features like RX VLAN offload and DMAC filters but
rules involving action like drop/forward to queue are also
getting modified by AF. Hence fix it by setting the default
RSS action only if requested by PF/VF.

Fixes: 967db3529eca ("octeontx2-af: add support for multicast/promisc packet replication feature")
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
---
 drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
index e5d6156..516adb5 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
@@ -415,6 +415,10 @@ static void npc_fixup_vf_rule(struct rvu *rvu, struct npc_mcam *mcam,
 			return;
 	}
 
+	/* AF modifies given action iff PF/VF has requested for it */
+	if ((entry->action & 0xFULL) != NIX_RX_ACTION_DEFAULT)
+		return;
+
 	/* copy VF default entry action to the VF mcam entry */
 	rx_action = npc_get_default_entry_action(rvu, mcam, blkaddr,
 						 target_func);
-- 
2.7.4