netdev - [PATCH net-next v2 09/14] octeontx2-af: Enable RSS with promiscuous mode

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Date:   Sun,  2 Dec 2018 18:17:44 +0530
From:   Jerin Jacob <jerinjacobk@...il.com>
To:     netdev@...r.kernel.org, davem@...emloft.net
Cc:     sgoutham@...vell.com, lcherian@...vell.com, gakula@...vell.com,
        jerinj@...vell.com, jerinjacobk@...il.com,
        Vamsi Attunuru <vamsi.attunuru@...vell.com>
Subject: [PATCH net-next v2 09/14] octeontx2-af: Enable RSS with promiscuous mode

From: Vamsi Attunuru <vamsi.attunuru@...vell.com>

This patch adds support for enabling RSS in promiscuous mode
if RSS is already requested by the AF client.

Signed-off-by: Vamsi Attunuru <vamsi.attunuru@...vell.com>
Signed-off-by: Jerin Jacob <jerinj@...vell.com>
---
 .../ethernet/marvell/octeontx2/af/rvu_npc.c   | 35 ++++++++++++++++---
 1 file changed, 31 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
index c203d3fddde9..bf81031f0fdd 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
@@ -368,9 +368,9 @@ void rvu_npc_install_promisc_entry(struct rvu *rvu, u16 pcifunc,
 				   int nixlf, u64 chan, bool allmulti)
 {
 	struct npc_mcam *mcam = &rvu->hw->mcam;
+	int blkaddr, ucast_idx, index, kwi;
 	struct mcam_entry entry = { {0} };
 	struct nix_rx_action action = { };
-	int blkaddr, index, kwi;
 
 	/* Only PF or AF VF can add a promiscuous entry */
 	if ((pcifunc & RVU_PFVF_FUNC_MASK) && !is_afvf(pcifunc))
@@ -392,9 +392,21 @@ void rvu_npc_install_promisc_entry(struct rvu *rvu, u16 pcifunc,
 		entry.kw_mask[kwi] = BIT_ULL(40);
 	}
 
-	*(u64 *)&action = 0x00;
-	action.op = NIX_RX_ACTIONOP_UCAST;
-	action.pf_func = pcifunc;
+	ucast_idx = npc_get_nixlf_mcam_index(mcam, pcifunc,
+					     nixlf, NIXLF_UCAST_ENTRY);
+
+	/* If the corresponding PF's ucast action is RSS,
+	 * use the same action for promisc also
+	 */
+	if (is_mcam_entry_enabled(rvu, mcam, blkaddr, ucast_idx))
+		*(u64 *)&action = npc_get_mcam_action(rvu, mcam,
+							blkaddr, ucast_idx);
+
+	if (action.op != NIX_RX_ACTIONOP_RSS) {
+		*(u64 *)&action = 0x00;
+		action.op = NIX_RX_ACTIONOP_UCAST;
+		action.pf_func = pcifunc;
+	}
 
 	entry.action = *(u64 *)&action;
 	npc_config_mcam_entry(rvu, mcam, blkaddr, index,
@@ -539,6 +551,21 @@ void rvu_npc_update_flowkey_alg_idx(struct rvu *rvu, u16 pcifunc, int nixlf,
 	rvu_write64(rvu, blkaddr,
 		    NPC_AF_MCAMEX_BANKX_ACTION(index, bank), *(u64 *)&action);
 
+	index = npc_get_nixlf_mcam_index(mcam, pcifunc,
+					 nixlf, NIXLF_PROMISC_ENTRY);
+
+	/* If PF's promiscuous entry is enabled,
+	 * Set RSS action for that entry as well
+	 */
+	if (is_mcam_entry_enabled(rvu, mcam, blkaddr, index)) {
+		bank = npc_get_bank(mcam, index);
+		index &= (mcam->banksize - 1);
+
+		rvu_write64(rvu, blkaddr,
+			    NPC_AF_MCAMEX_BANKX_ACTION(index, bank),
+			    *(u64 *)&action);
+	}
+
 	rvu_npc_update_rxvlan(rvu, pcifunc, nixlf);
 }
 
-- 
2.19.2