bnxt_en: Add IPV6 hardware RFS support.

Accept ipv6 flows in .ndo_rx_flow_steer() and support ETHTOOL_GRXCLSRULE
ipv6 flows.
Signed-off-by: Michael Chan <michael.chan@broadocm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -3316,10 +3316,26 @@ static int bnxt_hwrm_cfa_ntuple_filter_alloc(struct bnxt *bp,
 	req.ip_addr_type = CFA_NTUPLE_FILTER_ALLOC_REQ_IP_ADDR_TYPE_IPV4;
 	req.ip_protocol = keys->basic.ip_proto;
 
+	if (keys->basic.n_proto == htons(ETH_P_IPV6)) {
+		int i;
+
+		req.ethertype = htons(ETH_P_IPV6);
+		req.ip_addr_type =
+			CFA_NTUPLE_FILTER_ALLOC_REQ_IP_ADDR_TYPE_IPV6;
+		*(struct in6_addr *)&req.src_ipaddr[0] =
+			keys->addrs.v6addrs.src;
+		*(struct in6_addr *)&req.dst_ipaddr[0] =
+			keys->addrs.v6addrs.dst;
+		for (i = 0; i < 4; i++) {
+			req.src_ipaddr_mask[i] = cpu_to_be32(0xffffffff);
+			req.dst_ipaddr_mask[i] = cpu_to_be32(0xffffffff);
+		}
+	} else {
 		req.src_ipaddr[0] = keys->addrs.v4addrs.src;
 		req.src_ipaddr_mask[0] = cpu_to_be32(0xffffffff);
 		req.dst_ipaddr[0] = keys->addrs.v4addrs.dst;
 		req.dst_ipaddr_mask[0] = cpu_to_be32(0xffffffff);
+	}
 
 	req.src_port = keys->ports.src;
 	req.src_port_mask = cpu_to_be16(0xffff);
@@ -6588,12 +6604,18 @@ static int bnxt_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
 		goto err_free;
 	}
 
-	if ((fkeys->basic.n_proto != htons(ETH_P_IP)) ||
+	if ((fkeys->basic.n_proto != htons(ETH_P_IP) &&
+	     fkeys->basic.n_proto != htons(ETH_P_IPV6)) ||
 	    ((fkeys->basic.ip_proto != IPPROTO_TCP) &&
 	     (fkeys->basic.ip_proto != IPPROTO_UDP))) {
 		rc = -EPROTONOSUPPORT;
 		goto err_free;
 	}
+	if (fkeys->basic.n_proto == htons(ETH_P_IPV6) &&
+	    bp->hwrm_spec_code < 0x10601) {
+		rc = -EPROTONOSUPPORT;
+		goto err_free;
+	}
 
 	memcpy(new_fltr->dst_mac_addr, eth->h_dest, ETH_ALEN);
 	memcpy(new_fltr->src_mac_addr, eth->h_source, ETH_ALEN);

drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c

@@ -524,6 +524,7 @@ static int bnxt_grxclsrule(struct bnxt *bp, struct ethtool_rxnfc *cmd)
 
 fltr_found:
 	fkeys = &fltr->fkeys;
+	if (fkeys->basic.n_proto == htons(ETH_P_IP)) {
 		if (fkeys->basic.ip_proto == IPPROTO_TCP)
 			fs->flow_type = TCP_V4_FLOW;
 		else if (fkeys->basic.ip_proto == IPPROTO_UDP)
@@ -542,6 +543,30 @@ static int bnxt_grxclsrule(struct bnxt *bp, struct ethtool_rxnfc *cmd)
 
 		fs->h_u.tcp_ip4_spec.pdst = fkeys->ports.dst;
 		fs->m_u.tcp_ip4_spec.pdst = cpu_to_be16(~0);
+	} else {
+		int i;
+
+		if (fkeys->basic.ip_proto == IPPROTO_TCP)
+			fs->flow_type = TCP_V6_FLOW;
+		else if (fkeys->basic.ip_proto == IPPROTO_UDP)
+			fs->flow_type = UDP_V6_FLOW;
+		else
+			goto fltr_err;
+
+		*(struct in6_addr *)&fs->h_u.tcp_ip6_spec.ip6src[0] =
+			fkeys->addrs.v6addrs.src;
+		*(struct in6_addr *)&fs->h_u.tcp_ip6_spec.ip6dst[0] =
+			fkeys->addrs.v6addrs.dst;
+		for (i = 0; i < 4; i++) {
+			fs->m_u.tcp_ip6_spec.ip6src[i] = cpu_to_be32(~0);
+			fs->m_u.tcp_ip6_spec.ip6dst[i] = cpu_to_be32(~0);
+		}
+		fs->h_u.tcp_ip6_spec.psrc = fkeys->ports.src;
+		fs->m_u.tcp_ip6_spec.psrc = cpu_to_be16(~0);
+
+		fs->h_u.tcp_ip6_spec.pdst = fkeys->ports.dst;
+		fs->m_u.tcp_ip6_spec.pdst = cpu_to_be16(~0);
+	}
 
 	fs->ring_cookie = fltr->rxq;
 	rc = 0;