octeontx2-af: Support for NIXLF's UCAST/PROMISC/ALLMULTI modes

By default NIXLF is set in UCAST mode. This patch adds a new
mailbox message which when sent by a RVU PF changes this default
mode. When promiscuous mode is needed, the reserved promisc entry
for each of RVU PF is setup to match against ingress channel number
only, so that all pkts on that channel are accepted and forwarded
to the mode change requesting PF_FUNC's NIXLF.

PROMISC and ALLMULTI modes are supported only for PFs, for VFs only
UCAST mode is supported.

Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 57 insertions, 0 deletions

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
index a22eeb8af4ad..23ff47f7efc5 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
@@ -310,6 +310,61 @@ void rvu_npc_install_ucast_entry(struct rvu *rvu, u16 pcifunc,
 			      NIX_INTF_RX, &entry, true);
 }
 
+void rvu_npc_install_promisc_entry(struct rvu *rvu, u16 pcifunc,
+				   int nixlf, u64 chan, bool allmulti)
+{
+	struct npc_mcam *mcam = &rvu->hw->mcam;
+	struct mcam_entry entry = { {0} };
+	struct nix_rx_action action;
+	int blkaddr, index, kwi;
+
+	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0);
+	if (blkaddr < 0)
+		return;
+
+	/* Only PF or AF VF can add a promiscuous entry */
+	if (pcifunc & RVU_PFVF_FUNC_MASK)
+		return;
+
+	index = npc_get_nixlf_mcam_index(mcam, pcifunc,
+					 nixlf, NIXLF_PROMISC_ENTRY);
+
+	entry.kw[0] = chan;
+	entry.kw_mask[0] = 0xFFFULL;
+
+	if (allmulti) {
+		kwi = NPC_PARSE_RESULT_DMAC_OFFSET / sizeof(u64);
+		entry.kw[kwi] = BIT_ULL(40); /* LSB bit of 1st byte in DMAC */
+		entry.kw_mask[kwi] = BIT_ULL(40);
+	}
+
+	*(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,
+			      NIX_INTF_RX, &entry, true);
+}
+
+void rvu_npc_disable_promisc_entry(struct rvu *rvu, u16 pcifunc, int nixlf)
+{
+	struct npc_mcam *mcam = &rvu->hw->mcam;
+	int blkaddr, index;
+
+	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0);
+	if (blkaddr < 0)
+		return;
+
+	/* Only PF's have a promiscuous entry */
+	if (pcifunc & RVU_PFVF_FUNC_MASK)
+		return;
+
+	index = npc_get_nixlf_mcam_index(mcam, pcifunc,
+					 nixlf, NIXLF_PROMISC_ENTRY);
+	npc_enable_mcam_entry(rvu, mcam, blkaddr, index, false);
+}
+
 void rvu_npc_install_bcast_match_entry(struct rvu *rvu, u16 pcifunc,
 				       int nixlf, u64 chan)
 {
@@ -431,6 +486,8 @@ void rvu_npc_disable_mcam_entries(struct rvu *rvu, u16 pcifunc, int nixlf)
 				     NPC_AF_MCAMEX_BANKX_ACTION(index, bank));
 		if (action.op != NIX_RX_ACTIONOP_MCAST)
 			npc_enable_mcam_entry(rvu, mcam, blkaddr, index, false);
+
+		rvu_npc_disable_promisc_entry(rvu, pcifunc, nixlf);
 	}
 }