tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/* Broadcom NetXtreme-C/E network driver.
2 *
3 * Copyright (c) 2017 Broadcom Limited
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation.
8 */
9
10#ifndef BNXT_TC_H
11#define BNXT_TC_H
12
13#ifdef CONFIG_BNXT_FLOWER_OFFLOAD
14
15#include <net/ip_tunnels.h>
16
17/* Structs used for storing the filter/actions of the TC cmd.
18 */
19struct bnxt_tc_l2_key {
20 u8 dmac[ETH_ALEN];
21 u8 smac[ETH_ALEN];
22 __be16 inner_vlan_tpid;
23 __be16 inner_vlan_tci;
24 __be16 ether_type;
25 u8 num_vlans;
26};
27
28struct bnxt_tc_l3_key {
29 union {
30 struct {
31 struct in_addr daddr;
32 struct in_addr saddr;
33 } ipv4;
34 struct {
35 struct in6_addr daddr;
36 struct in6_addr saddr;
37 } ipv6;
38 };
39};
40
41struct bnxt_tc_l4_key {
42 u8 ip_proto;
43 union {
44 struct {
45 __be16 sport;
46 __be16 dport;
47 } ports;
48 struct {
49 u8 type;
50 u8 code;
51 } icmp;
52 };
53};
54
55struct bnxt_tc_tunnel_key {
56 struct bnxt_tc_l2_key l2;
57 struct bnxt_tc_l3_key l3;
58 struct bnxt_tc_l4_key l4;
59 __be32 id;
60};
61
62struct bnxt_tc_actions {
63 u32 flags;
64#define BNXT_TC_ACTION_FLAG_FWD BIT(0)
65#define BNXT_TC_ACTION_FLAG_FWD_VXLAN BIT(1)
66#define BNXT_TC_ACTION_FLAG_PUSH_VLAN BIT(3)
67#define BNXT_TC_ACTION_FLAG_POP_VLAN BIT(4)
68#define BNXT_TC_ACTION_FLAG_DROP BIT(5)
69#define BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP BIT(6)
70#define BNXT_TC_ACTION_FLAG_TUNNEL_DECAP BIT(7)
71
72 u16 dst_fid;
73 struct net_device *dst_dev;
74 __be16 push_vlan_tpid;
75 __be16 push_vlan_tci;
76
77 /* tunnel encap */
78 struct ip_tunnel_key tun_encap_key;
79};
80
81struct bnxt_tc_flow {
82 u32 flags;
83#define BNXT_TC_FLOW_FLAGS_ETH_ADDRS BIT(1)
84#define BNXT_TC_FLOW_FLAGS_IPV4_ADDRS BIT(2)
85#define BNXT_TC_FLOW_FLAGS_IPV6_ADDRS BIT(3)
86#define BNXT_TC_FLOW_FLAGS_PORTS BIT(4)
87#define BNXT_TC_FLOW_FLAGS_ICMP BIT(5)
88#define BNXT_TC_FLOW_FLAGS_TUNL_ETH_ADDRS BIT(6)
89#define BNXT_TC_FLOW_FLAGS_TUNL_IPV4_ADDRS BIT(7)
90#define BNXT_TC_FLOW_FLAGS_TUNL_IPV6_ADDRS BIT(8)
91#define BNXT_TC_FLOW_FLAGS_TUNL_PORTS BIT(9)
92#define BNXT_TC_FLOW_FLAGS_TUNL_ID BIT(10)
93#define BNXT_TC_FLOW_FLAGS_TUNNEL (BNXT_TC_FLOW_FLAGS_TUNL_ETH_ADDRS | \
94 BNXT_TC_FLOW_FLAGS_TUNL_IPV4_ADDRS | \
95 BNXT_TC_FLOW_FLAGS_TUNL_IPV6_ADDRS |\
96 BNXT_TC_FLOW_FLAGS_TUNL_PORTS |\
97 BNXT_TC_FLOW_FLAGS_TUNL_ID)
98
99 /* flow applicable to pkts ingressing on this fid */
100 u16 src_fid;
101 struct bnxt_tc_l2_key l2_key;
102 struct bnxt_tc_l2_key l2_mask;
103 struct bnxt_tc_l3_key l3_key;
104 struct bnxt_tc_l3_key l3_mask;
105 struct bnxt_tc_l4_key l4_key;
106 struct bnxt_tc_l4_key l4_mask;
107 struct ip_tunnel_key tun_key;
108 struct ip_tunnel_key tun_mask;
109
110 struct bnxt_tc_actions actions;
111
112 /* updated stats accounting for hw-counter wrap-around */
113 struct bnxt_tc_flow_stats stats;
114 /* previous snap-shot of stats */
115 struct bnxt_tc_flow_stats prev_stats;
116 unsigned long lastused; /* jiffies */
117 /* for calculating delta from prev_stats and
118 * updating prev_stats atomically.
119 */
120 spinlock_t stats_lock;
121};
122
123/* Tunnel encap/decap hash table
124 * This table is used to maintain a list of flows that use
125 * the same tunnel encap/decap params (ip_daddrs, vni, udp_dport)
126 * and the FW returned handle.
127 * A separate table is maintained for encap and decap
128 */
129struct bnxt_tc_tunnel_node {
130 struct ip_tunnel_key key;
131 struct rhash_head node;
132
133 /* tunnel l2 info */
134 struct bnxt_tc_l2_key l2_info;
135
136#define INVALID_TUNNEL_HANDLE cpu_to_le32(0xffffffff)
137 /* tunnel handle returned by FW */
138 __le32 tunnel_handle;
139
140 u32 refcount;
141 struct rcu_head rcu;
142};
143
144/* L2 hash table
145 * The same data-struct is used for L2-flow table and L2-tunnel table.
146 * The L2 part of a flow or tunnel is stored in a hash table.
147 * A flow that shares the same L2 key/mask with an
148 * already existing flow/tunnel must refer to it's flow handle or
149 * decap_filter_id respectively.
150 */
151struct bnxt_tc_l2_node {
152 /* hash key: first 16b of key */
153#define BNXT_TC_L2_KEY_LEN 16
154 struct bnxt_tc_l2_key key;
155 struct rhash_head node;
156
157 /* a linked list of flows that share the same l2 key */
158 struct list_head common_l2_flows;
159
160 /* number of flows/tunnels sharing the l2 key */
161 u16 refcount;
162
163 struct rcu_head rcu;
164};
165
166struct bnxt_tc_flow_node {
167 /* hash key: provided by TC */
168 unsigned long cookie;
169 struct rhash_head node;
170
171 struct bnxt_tc_flow flow;
172
173 __le16 flow_handle;
174
175 /* L2 node in l2 hashtable that shares flow's l2 key */
176 struct bnxt_tc_l2_node *l2_node;
177 /* for the shared_flows list maintained in l2_node */
178 struct list_head l2_list_node;
179
180 /* tunnel encap related */
181 struct bnxt_tc_tunnel_node *encap_node;
182
183 /* tunnel decap related */
184 struct bnxt_tc_tunnel_node *decap_node;
185 /* L2 node in tunnel-l2 hashtable that shares flow's tunnel l2 key */
186 struct bnxt_tc_l2_node *decap_l2_node;
187 /* for the shared_flows list maintained in tunnel decap l2_node */
188 struct list_head decap_l2_list_node;
189
190 struct rcu_head rcu;
191};
192
193int bnxt_tc_setup_flower(struct bnxt *bp, u16 src_fid,
194 struct tc_cls_flower_offload *cls_flower);
195int bnxt_init_tc(struct bnxt *bp);
196void bnxt_shutdown_tc(struct bnxt *bp);
197void bnxt_tc_flow_stats_work(struct bnxt *bp);
198
199static inline bool bnxt_tc_flower_enabled(struct bnxt *bp)
200{
201 return bp->tc_info && bp->tc_info->enabled;
202}
203
204#else /* CONFIG_BNXT_FLOWER_OFFLOAD */
205
206static inline int bnxt_tc_setup_flower(struct bnxt *bp, u16 src_fid,
207 struct tc_cls_flower_offload *cls_flower)
208{
209 return -EOPNOTSUPP;
210}
211
212static inline int bnxt_init_tc(struct bnxt *bp)
213{
214 return 0;
215}
216
217static inline void bnxt_shutdown_tc(struct bnxt *bp)
218{
219}
220
221static inline void bnxt_tc_flow_stats_work(struct bnxt *bp)
222{
223}
224
225static inline bool bnxt_tc_flower_enabled(struct bnxt *bp)
226{
227 return false;
228}
229#endif /* CONFIG_BNXT_FLOWER_OFFLOAD */
230#endif /* BNXT_TC_H */