octeontx2-af: Enable broadcast packet replication

Ingress packet replication support has been added to 96xx B0
silicon. This patch enables using that feature to replicate
ingress broadcast packets to PF and it's VFs.

Also fixed below issues
- VFs can also install NPC MCAM entry to forward broadcast pkts.
  Otherwise, unless PF's interface is UP, VFs will not receive
  bcast packets.
- NPC MCAM entry is disabled when PF and all it's VFs are down.
- Few corner cases in installing multicast entry list.

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

1 files changed, 47 insertions, 40 deletions

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
index f0363d08c36d..40e431debbe9 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_npc.c
@@ -477,68 +477,75 @@ void rvu_npc_install_bcast_match_entry(struct rvu *rvu, u16 pcifunc,
 {
 	struct npc_mcam *mcam = &rvu->hw->mcam;
 	struct mcam_entry entry = { {0} };
+	struct rvu_hwinfo *hw = rvu->hw;
 	struct nix_rx_action action;
-#ifdef MCAST_MCE
 	struct rvu_pfvf *pfvf;
-#endif
 	int blkaddr, index;
 
 	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0);
 	if (blkaddr < 0)
 		return;
 
-	/* Only PF can add a bcast match entry */
-	if (pcifunc & RVU_PFVF_FUNC_MASK)
+	/* Skip LBK VFs */
+	if (is_afvf(pcifunc))
+		return;
+
+	/* If pkt replication is not supported,
+	 * then only PF is allowed to add a bcast match entry.
+	 */
+	if (!hw->cap.nix_rx_multicast && pcifunc & RVU_PFVF_FUNC_MASK)
 		return;
-#ifdef MCAST_MCE
-	pfvf = rvu_get_pfvf(rvu, pcifunc & ~RVU_PFVF_FUNC_MASK);
-#endif
 
+	/* Get 'pcifunc' of PF device */
+	pcifunc = pcifunc & ~RVU_PFVF_FUNC_MASK;
 	index = npc_get_nixlf_mcam_index(mcam, pcifunc,
 					 nixlf, NIXLF_BCAST_ENTRY);
 
-	/* Check for L2B bit and LMAC channel
-	 * NOTE: Since MKEX default profile(a reduced version intended to
-	 * accommodate more capability but igoring few bits) a stap-gap
-	 * approach.
-	 * Since we care for L2B which by HRM NPC_PARSE_KEX_S at BIT_POS[25], So
-	 * moved to BIT_POS[13], ignoring ERRCODE, ERRLEV as we'll loose out
-	 * on capability features needed for CoS (/from ODP PoV) e.g: VLAN,
-	 * DSCP.
-	 *
-	 * Reduced layout of MKEX default profile -
-	 * Includes following are (i.e.CHAN, L2/3{B/M}, LA, LB, LC, LD):
-	 *
-	 * BIT_POS[31:28] : LD
-	 * BIT_POS[27:24] : LC
-	 * BIT_POS[23:20] : LB
-	 * BIT_POS[19:16] : LA
-	 * BIT_POS[15:12] : L3B, L3M, L2B, L2M
-	 * BIT_POS[11:00] : CHAN
-	 *
+	/* Match ingress channel */
+	entry.kw[0] = chan;
+	entry.kw_mask[0] = 0xfffull;
+
+	/* Match broadcast MAC address.
+	 * DMAC is extracted at 0th bit of PARSE_KEX::KW1
 	 */
-	entry.kw[0] = BIT_ULL(13) | chan;
-	entry.kw_mask[0] = BIT_ULL(13) | 0xFFFULL;
+	entry.kw[1] = 0xffffffffffffull;
+	entry.kw_mask[1] = 0xffffffffffffull;
 
 	*(u64 *)&action = 0x00;
-#ifdef MCAST_MCE
-	/* Early silicon doesn't support pkt replication,
-	 * so install entry with UCAST action, so that PF
-	 * receives all broadcast packets.
-	 */
-	action.op = NIX_RX_ACTIONOP_MCAST;
-	action.pf_func = pcifunc;
-	action.index = pfvf->bcast_mce_idx;
-#else
-	action.op = NIX_RX_ACTIONOP_UCAST;
-	action.pf_func = pcifunc;
-#endif
+	if (!hw->cap.nix_rx_multicast) {
+		/* Early silicon doesn't support pkt replication,
+		 * so install entry with UCAST action, so that PF
+		 * receives all broadcast packets.
+		 */
+		action.op = NIX_RX_ACTIONOP_UCAST;
+		action.pf_func = pcifunc;
+	} else {
+		pfvf = rvu_get_pfvf(rvu, pcifunc);
+		action.index = pfvf->bcast_mce_idx;
+		action.op = NIX_RX_ACTIONOP_MCAST;
+	}
 
 	entry.action = *(u64 *)&action;
 	npc_config_mcam_entry(rvu, mcam, blkaddr, index,
 			      NIX_INTF_RX, &entry, true);
 }
 
+void rvu_npc_disable_bcast_entry(struct rvu *rvu, u16 pcifunc)
+{
+	struct npc_mcam *mcam = &rvu->hw->mcam;
+	int blkaddr, index;
+
+	blkaddr = rvu_get_blkaddr(rvu, BLKTYPE_NPC, 0);
+	if (blkaddr < 0)
+		return;
+
+	/* Get 'pcifunc' of PF device */
+	pcifunc = pcifunc & ~RVU_PFVF_FUNC_MASK;
+
+	index = npc_get_nixlf_mcam_index(mcam, pcifunc, 0, NIXLF_BCAST_ENTRY);
+	npc_enable_mcam_entry(rvu, mcam, blkaddr, index, false);
+}
+
 void rvu_npc_update_flowkey_alg_idx(struct rvu *rvu, u16 pcifunc, int nixlf,
 				    int group, int alg_idx, int mcam_index)
 {