1/******************************************************************************
2
3  Copyright (c) 2001-2017, Intel Corporation
4  All rights reserved.
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32******************************************************************************/
33/*$FreeBSD$*/
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	if_ctx_t       ctx = context;
56	struct adapter *adapter = iflib_get_softc(ctx);
57	struct ifnet   *ifp = iflib_get_ifp(ctx);
58
59	if (!(adapter->feat_en & IXGBE_FEATURE_FDIR))
60		return;
61	if (adapter->fdir_reinit != 1) /* Shouldn't happen */
62		return;
63	ixgbe_reinit_fdir_tables_82599(&adapter->hw);
64	adapter->fdir_reinit = 0;
65	/* re-enable flow director interrupts */
66	IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
67	/* Restart the interface */
68	ifp->if_drv_flags |= IFF_DRV_RUNNING;
69} /* ixgbe_reinit_fdir */
70
71/************************************************************************
72 * ixgbe_atr
73 *
74 *   Parse packet headers so that Flow Director can make
75 *   a hashed filter table entry allowing traffic flows
76 *   to be identified and kept on the same cpu.  This
77 *   would be a performance hit, but we only do it at
78 *   IXGBE_FDIR_RATE of packets.
79 ************************************************************************/
80void
81ixgbe_atr(struct tx_ring *txr, struct mbuf *mp)
82{
83	struct adapter             *adapter = txr->adapter;
84	struct ix_queue            *que;
85	struct ip                  *ip;
86	struct tcphdr              *th;
87	struct udphdr              *uh;
88	struct ether_vlan_header   *eh;
89	union ixgbe_atr_hash_dword input = {.dword = 0};
90	union ixgbe_atr_hash_dword common = {.dword = 0};
91	int                        ehdrlen, ip_hlen;
92	u16                        etype;
93
94	eh = mtod(mp, struct ether_vlan_header *);
95	if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) {
96		ehdrlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN;
97		etype = eh->evl_proto;
98	} else {
99		ehdrlen = ETHER_HDR_LEN;
100		etype = eh->evl_encap_proto;
101	}
102
103	/* Only handling IPv4 */
104	if (etype != htons(ETHERTYPE_IP))
105		return;
106
107	ip = (struct ip *)(mp->m_data + ehdrlen);
108	ip_hlen = ip->ip_hl << 2;
109
110	/* check if we're UDP or TCP */
111	switch (ip->ip_p) {
112	case IPPROTO_TCP:
113		th = (struct tcphdr *)((caddr_t)ip + ip_hlen);
114		/* src and dst are inverted */
115		common.port.dst ^= th->th_sport;
116		common.port.src ^= th->th_dport;
117		input.formatted.flow_type ^= IXGBE_ATR_FLOW_TYPE_TCPV4;
118		break;
119	case IPPROTO_UDP:
120		uh = (struct udphdr *)((caddr_t)ip + ip_hlen);
121		/* src and dst are inverted */
122		common.port.dst ^= uh->uh_sport;
123		common.port.src ^= uh->uh_dport;
124		input.formatted.flow_type ^= IXGBE_ATR_FLOW_TYPE_UDPV4;
125		break;
126	default:
127		return;
128	}
129
130	input.formatted.vlan_id = htobe16(mp->m_pkthdr.ether_vtag);
131	if (mp->m_pkthdr.ether_vtag)
132		common.flex_bytes ^= htons(ETHERTYPE_VLAN);
133	else
134		common.flex_bytes ^= etype;
135	common.ip ^= ip->ip_src.s_addr ^ ip->ip_dst.s_addr;
136
137	que = &adapter->queues[txr->me];
138	/*
139	 * This assumes the Rx queue and Tx
140	 * queue are bound to the same CPU
141	 */
142	ixgbe_fdir_add_signature_filter_82599(&adapter->hw,
143	    input, common, que->msix);
144} /* ixgbe_atr */
145
146#else
147
148/* TASK_INIT needs this function defined regardless if it's enabled */
149void
150ixgbe_reinit_fdir(void *context)
151{
152	UNREFERENCED_PARAMETER(context);
153} /* ixgbe_reinit_fdir */
154
155void
156ixgbe_atr(struct tx_ring *txr, struct mbuf *mp)
157{
158	UNREFERENCED_2PARAMETER(txr, mp);
159} /* ixgbe_atr */
160
161#endif
162