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33/*$FreeBSD: stable/11/sys/dev/ixgbe/if_fdir.c 347419 2019-05-10 00:46:43Z erj $*/
34
35#include "ixgbe.h"
36
37#ifdef IXGBE_FDIR
38
39void
40ixgbe_init_fdir(struct adapter *adapter)
41{
42	u32 hdrm = 32 << fdir_pballoc;
43
44	if (!(adapter->feat_en & IXGBE_FEATURE_FDIR))
45		return;
46
47	adapter->hw.mac.ops.setup_rxpba(&adapter->hw, 0, hdrm,
48	    PBA_STRATEGY_EQUAL);
49	ixgbe_init_fdir_signature_82599(&adapter->hw, fdir_pballoc);
50} /* ixgbe_init_fdir */
51
52void
53ixgbe_reinit_fdir(void *context)
54{
55	struct adapter *adapter = context;
56	struct ifnet   *ifp = adapter->ifp;
57
58	if (!(adapter->feat_en & IXGBE_FEATURE_FDIR))
59		return;
60	if (adapter->fdir_reinit != 1) /* Shouldn't happen */
61		return;
62	ixgbe_reinit_fdir_tables_82599(&adapter->hw);
63	adapter->fdir_reinit = 0;
64	/* re-enable flow director interrupts */
65	IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
66	/* Restart the interface */
67	ifp->if_drv_flags |= IFF_DRV_RUNNING;
68} /* ixgbe_reinit_fdir */
69
70/************************************************************************
71 * ixgbe_atr
72 *
73 *   Parse packet headers so that Flow Director can make
74 *   a hashed filter table entry allowing traffic flows
75 *   to be identified and kept on the same cpu.  This
76 *   would be a performance hit, but we only do it at
77 *   IXGBE_FDIR_RATE of packets.
78 ************************************************************************/
79void
80ixgbe_atr(struct tx_ring *txr, struct mbuf *mp)
81{
82	struct adapter             *adapter = txr->adapter;
83	struct ix_queue            *que;
84	struct ip                  *ip;
85	struct tcphdr              *th;
86	struct udphdr              *uh;
87	struct ether_vlan_header   *eh;
88	union ixgbe_atr_hash_dword input = {.dword = 0};
89	union ixgbe_atr_hash_dword common = {.dword = 0};
90	int                        ehdrlen, ip_hlen;
91	u16                        etype;
92
93	eh = mtod(mp, struct ether_vlan_header *);
94	if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) {
95		ehdrlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN;
96		etype = eh->evl_proto;
97	} else {
98		ehdrlen = ETHER_HDR_LEN;
99		etype = eh->evl_encap_proto;
100	}
101
102	/* Only handling IPv4 */
103	if (etype != htons(ETHERTYPE_IP))
104		return;
105
106	ip = (struct ip *)(mp->m_data + ehdrlen);
107	ip_hlen = ip->ip_hl << 2;
108
109	/* check if we're UDP or TCP */
110	switch (ip->ip_p) {
111	case IPPROTO_TCP:
112		th = (struct tcphdr *)((caddr_t)ip + ip_hlen);
113		/* src and dst are inverted */
114		common.port.dst ^= th->th_sport;
115		common.port.src ^= th->th_dport;
116		input.formatted.flow_type ^= IXGBE_ATR_FLOW_TYPE_TCPV4;
117		break;
118	case IPPROTO_UDP:
119		uh = (struct udphdr *)((caddr_t)ip + ip_hlen);
120		/* src and dst are inverted */
121		common.port.dst ^= uh->uh_sport;
122		common.port.src ^= uh->uh_dport;
123		input.formatted.flow_type ^= IXGBE_ATR_FLOW_TYPE_UDPV4;
124		break;
125	default:
126		return;
127	}
128
129	input.formatted.vlan_id = htobe16(mp->m_pkthdr.ether_vtag);
130	if (mp->m_pkthdr.ether_vtag)
131		common.flex_bytes ^= htons(ETHERTYPE_VLAN);
132	else
133		common.flex_bytes ^= etype;
134	common.ip ^= ip->ip_src.s_addr ^ ip->ip_dst.s_addr;
135
136	que = &adapter->queues[txr->me];
137	/*
138	 * This assumes the Rx queue and Tx
139	 * queue are bound to the same CPU
140	 */
141	ixgbe_fdir_add_signature_filter_82599(&adapter->hw,
142	    input, common, que->msix);
143} /* ixgbe_atr */
144
145#else
146
147/* TASK_INIT needs this function defined regardless if it's enabled */
148void
149ixgbe_reinit_fdir(void *context)
150{
151	UNREFERENCED_1PARAMETER(context);
152} /* ixgbe_reinit_fdir */
153
154void
155ixgbe_atr(struct tx_ring *txr, struct mbuf *mp)
156{
157	UNREFERENCED_2PARAMETER(txr, mp);
158} /* ixgbe_atr */
159
160#endif
161