1 /*
2  * This file is part of the Chelsio T4/T5/T6 Ethernet driver for Linux.
3  *
4  * Copyright (c) 2017 Chelsio Communications, Inc. All rights reserved.
5  *
6  * This software is available to you under a choice of one of two
7  * licenses.  You may choose to be licensed under the terms of the GNU
8  * General Public License (GPL) Version 2, available from the file
9  * COPYING in the main directory of this source tree, or the
10  * OpenIB.org BSD license below:
11  *
12  *     Redistribution and use in source and binary forms, with or
13  *     without modification, are permitted provided that the following
14  *     conditions are met:
15  *
16  *      - Redistributions of source code must retain the above
17  *        copyright notice, this list of conditions and the following
18  *        disclaimer.
19  *
20  *      - Redistributions in binary form must reproduce the above
21  *        copyright notice, this list of conditions and the following
22  *        disclaimer in the documentation and/or other materials
23  *        provided with the distribution.
24  *
25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32  * SOFTWARE.
33  */
34 
35 #ifndef __CXGB4_TC_FLOWER_H
36 #define __CXGB4_TC_FLOWER_H
37 
38 #include <net/pkt_cls.h>
39 
40 struct ch_tc_flower_stats {
41 	u64 prev_packet_count;
42 	u64 packet_count;
43 	u64 byte_count;
44 	u64 last_used;
45 };
46 
47 struct ch_tc_flower_entry {
48 	struct ch_filter_specification fs;
49 	struct ch_tc_flower_stats stats;
50 	unsigned long tc_flower_cookie;
51 	struct rhash_head node;
52 	struct rcu_head rcu;
53 	spinlock_t lock; /* lock for stats */
54 	u32 filter_id;
55 };
56 
57 enum {
58 	ETH_DMAC_31_0,	/* dmac bits 0.. 31 */
59 	ETH_DMAC_47_32,	/* dmac bits 32..47 */
60 	ETH_SMAC_15_0,	/* smac bits 0.. 15 */
61 	ETH_SMAC_47_16,	/* smac bits 16..47 */
62 
63 	IP4_SRC,	/* 32-bit IPv4 src  */
64 	IP4_DST,	/* 32-bit IPv4 dst  */
65 
66 	IP6_SRC_31_0,	/* src bits 0..  31 */
67 	IP6_SRC_63_32,	/* src bits 63.. 32 */
68 	IP6_SRC_95_64,	/* src bits 95.. 64 */
69 	IP6_SRC_127_96,	/* src bits 127..96 */
70 
71 	IP6_DST_31_0,	/* dst bits 0..  31 */
72 	IP6_DST_63_32,	/* dst bits 63.. 32 */
73 	IP6_DST_95_64,	/* dst bits 95.. 64 */
74 	IP6_DST_127_96,	/* dst bits 127..96 */
75 
76 	TCP_SPORT,	/* 16-bit TCP sport */
77 	TCP_DPORT,	/* 16-bit TCP dport */
78 
79 	UDP_SPORT,	/* 16-bit UDP sport */
80 	UDP_DPORT,	/* 16-bit UDP dport */
81 };
82 
83 struct ch_tc_pedit_fields {
84 	u8 field;
85 	u8 size;
86 	u32 offset;
87 };
88 
89 #define PEDIT_FIELDS(type, field, size, fs_field, offset) \
90 	{ type## field, size, \
91 		offsetof(struct ch_filter_specification, fs_field) + (offset) }
92 
93 #define PEDIT_ETH_DMAC_MASK		0xffff
94 #define PEDIT_TCP_UDP_SPORT_MASK	0xffff
95 #define PEDIT_ETH_DMAC_31_0		0x0
96 #define PEDIT_ETH_DMAC_47_32_SMAC_15_0	0x4
97 #define PEDIT_ETH_SMAC_47_16		0x8
98 #define PEDIT_IP4_SRC			0xC
99 #define PEDIT_IP4_DST			0x10
100 #define PEDIT_IP6_SRC_31_0		0x8
101 #define PEDIT_IP6_SRC_63_32		0xC
102 #define PEDIT_IP6_SRC_95_64		0x10
103 #define PEDIT_IP6_SRC_127_96		0x14
104 #define PEDIT_IP6_DST_31_0		0x18
105 #define PEDIT_IP6_DST_63_32		0x1C
106 #define PEDIT_IP6_DST_95_64		0x20
107 #define PEDIT_IP6_DST_127_96		0x24
108 #define PEDIT_TCP_SPORT_DPORT		0x0
109 #define PEDIT_UDP_SPORT_DPORT		0x0
110 
111 enum cxgb4_action_natmode_flags {
112 	CXGB4_ACTION_NATMODE_NONE = 0,
113 	CXGB4_ACTION_NATMODE_DIP = (1 << 0),
114 	CXGB4_ACTION_NATMODE_SIP = (1 << 1),
115 	CXGB4_ACTION_NATMODE_DPORT = (1 << 2),
116 	CXGB4_ACTION_NATMODE_SPORT = (1 << 3),
117 };
118 
119 /* TC PEDIT action to NATMODE translation entry */
120 struct cxgb4_natmode_config {
121 	enum chip_type chip;
122 	u8 flags;
123 	u8 natmode;
124 };
125 
126 void cxgb4_process_flow_actions(struct net_device *in,
127 				struct flow_action *actions,
128 				struct ch_filter_specification *fs);
129 int cxgb4_validate_flow_actions(struct net_device *dev,
130 				struct flow_action *actions,
131 				struct netlink_ext_ack *extack,
132 				u8 matchall_filter);
133 
134 int cxgb4_tc_flower_replace(struct net_device *dev,
135 			    struct flow_cls_offload *cls);
136 int cxgb4_tc_flower_destroy(struct net_device *dev,
137 			    struct flow_cls_offload *cls);
138 int cxgb4_tc_flower_stats(struct net_device *dev,
139 			  struct flow_cls_offload *cls);
140 int cxgb4_flow_rule_replace(struct net_device *dev, struct flow_rule *rule,
141 			    u32 tc_prio, struct netlink_ext_ack *extack,
142 			    struct ch_filter_specification *fs, u32 *tid);
143 int cxgb4_flow_rule_destroy(struct net_device *dev, u32 tc_prio,
144 			    struct ch_filter_specification *fs, int tid);
145 
146 int cxgb4_init_tc_flower(struct adapter *adap);
147 void cxgb4_cleanup_tc_flower(struct adapter *adap);
148 #endif /* __CXGB4_TC_FLOWER_H */
149