1 /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
2 /* Copyright (c) 2017-2018 Mellanox Technologies. All rights reserved */
3
4 #ifndef _MLXSW_CORE_ACL_FLEX_KEYS_H
5 #define _MLXSW_CORE_ACL_FLEX_KEYS_H
6
7 #include <linux/types.h>
8 #include <linux/bitmap.h>
9
10 #include "item.h"
11
12 enum mlxsw_afk_element {
13 MLXSW_AFK_ELEMENT_SRC_SYS_PORT,
14 MLXSW_AFK_ELEMENT_DMAC_32_47,
15 MLXSW_AFK_ELEMENT_DMAC_0_31,
16 MLXSW_AFK_ELEMENT_SMAC_32_47,
17 MLXSW_AFK_ELEMENT_SMAC_0_31,
18 MLXSW_AFK_ELEMENT_ETHERTYPE,
19 MLXSW_AFK_ELEMENT_IP_PROTO,
20 MLXSW_AFK_ELEMENT_SRC_IP_96_127,
21 MLXSW_AFK_ELEMENT_SRC_IP_64_95,
22 MLXSW_AFK_ELEMENT_SRC_IP_32_63,
23 MLXSW_AFK_ELEMENT_SRC_IP_0_31,
24 MLXSW_AFK_ELEMENT_DST_IP_96_127,
25 MLXSW_AFK_ELEMENT_DST_IP_64_95,
26 MLXSW_AFK_ELEMENT_DST_IP_32_63,
27 MLXSW_AFK_ELEMENT_DST_IP_0_31,
28 MLXSW_AFK_ELEMENT_DST_L4_PORT,
29 MLXSW_AFK_ELEMENT_SRC_L4_PORT,
30 MLXSW_AFK_ELEMENT_VID,
31 MLXSW_AFK_ELEMENT_PCP,
32 MLXSW_AFK_ELEMENT_TCP_FLAGS,
33 MLXSW_AFK_ELEMENT_IP_TTL_,
34 MLXSW_AFK_ELEMENT_IP_ECN,
35 MLXSW_AFK_ELEMENT_IP_DSCP,
36 MLXSW_AFK_ELEMENT_VIRT_ROUTER_MSB,
37 MLXSW_AFK_ELEMENT_VIRT_ROUTER_LSB,
38 MLXSW_AFK_ELEMENT_FDB_MISS,
39 MLXSW_AFK_ELEMENT_L4_PORT_RANGE,
40 MLXSW_AFK_ELEMENT_MAX,
41 };
42
43 enum mlxsw_afk_element_type {
44 MLXSW_AFK_ELEMENT_TYPE_U32,
45 MLXSW_AFK_ELEMENT_TYPE_BUF,
46 };
47
48 struct mlxsw_afk_element_info {
49 enum mlxsw_afk_element element; /* element ID */
50 enum mlxsw_afk_element_type type;
51 struct mlxsw_item item; /* element geometry in internal storage */
52 };
53
54 #define MLXSW_AFK_ELEMENT_INFO(_type, _element, _offset, _shift, _size) \
55 [MLXSW_AFK_ELEMENT_##_element] = { \
56 .element = MLXSW_AFK_ELEMENT_##_element, \
57 .type = _type, \
58 .item = { \
59 .offset = _offset, \
60 .shift = _shift, \
61 .size = {.bits = _size}, \
62 .name = #_element, \
63 }, \
64 }
65
66 #define MLXSW_AFK_ELEMENT_INFO_U32(_element, _offset, _shift, _size) \
67 MLXSW_AFK_ELEMENT_INFO(MLXSW_AFK_ELEMENT_TYPE_U32, \
68 _element, _offset, _shift, _size)
69
70 #define MLXSW_AFK_ELEMENT_INFO_BUF(_element, _offset, _size) \
71 MLXSW_AFK_ELEMENT_INFO(MLXSW_AFK_ELEMENT_TYPE_BUF, \
72 _element, _offset, 0, _size)
73
74 #define MLXSW_AFK_ELEMENT_STORAGE_SIZE 0x44
75
76 struct mlxsw_afk_element_inst { /* element instance in actual block */
77 enum mlxsw_afk_element element;
78 enum mlxsw_afk_element_type type;
79 struct mlxsw_item item; /* element geometry in block */
80 int u32_key_diff; /* in case value needs to be adjusted before write
81 * this diff is here to handle that
82 */
83 bool avoid_size_check;
84 };
85
86 #define MLXSW_AFK_ELEMENT_INST(_type, _element, _offset, \
87 _shift, _size, _u32_key_diff, _avoid_size_check) \
88 { \
89 .element = MLXSW_AFK_ELEMENT_##_element, \
90 .type = _type, \
91 .item = { \
92 .offset = _offset, \
93 .shift = _shift, \
94 .size = {.bits = _size}, \
95 .name = #_element, \
96 }, \
97 .u32_key_diff = _u32_key_diff, \
98 .avoid_size_check = _avoid_size_check, \
99 }
100
101 #define MLXSW_AFK_ELEMENT_INST_U32(_element, _offset, _shift, _size) \
102 MLXSW_AFK_ELEMENT_INST(MLXSW_AFK_ELEMENT_TYPE_U32, \
103 _element, _offset, _shift, _size, 0, false)
104
105 #define MLXSW_AFK_ELEMENT_INST_EXT_U32(_element, _offset, \
106 _shift, _size, _key_diff, \
107 _avoid_size_check) \
108 MLXSW_AFK_ELEMENT_INST(MLXSW_AFK_ELEMENT_TYPE_U32, \
109 _element, _offset, _shift, _size, \
110 _key_diff, _avoid_size_check)
111
112 #define MLXSW_AFK_ELEMENT_INST_BUF(_element, _offset, _size) \
113 MLXSW_AFK_ELEMENT_INST(MLXSW_AFK_ELEMENT_TYPE_BUF, \
114 _element, _offset, 0, _size, 0, false)
115
116 struct mlxsw_afk_block {
117 u16 encoding; /* block ID */
118 struct mlxsw_afk_element_inst *instances;
119 unsigned int instances_count;
120 };
121
122 #define MLXSW_AFK_BLOCK(_encoding, _instances) \
123 { \
124 .encoding = _encoding, \
125 .instances = _instances, \
126 .instances_count = ARRAY_SIZE(_instances), \
127 }
128
129 struct mlxsw_afk_element_usage {
130 DECLARE_BITMAP(usage, MLXSW_AFK_ELEMENT_MAX);
131 };
132
133 #define mlxsw_afk_element_usage_for_each(element, elusage) \
134 for_each_set_bit(element, (elusage)->usage, MLXSW_AFK_ELEMENT_MAX)
135
136 static inline void
mlxsw_afk_element_usage_add(struct mlxsw_afk_element_usage * elusage,enum mlxsw_afk_element element)137 mlxsw_afk_element_usage_add(struct mlxsw_afk_element_usage *elusage,
138 enum mlxsw_afk_element element)
139 {
140 __set_bit(element, elusage->usage);
141 }
142
143 static inline void
mlxsw_afk_element_usage_zero(struct mlxsw_afk_element_usage * elusage)144 mlxsw_afk_element_usage_zero(struct mlxsw_afk_element_usage *elusage)
145 {
146 bitmap_zero(elusage->usage, MLXSW_AFK_ELEMENT_MAX);
147 }
148
149 static inline void
mlxsw_afk_element_usage_fill(struct mlxsw_afk_element_usage * elusage,const enum mlxsw_afk_element * elements,unsigned int elements_count)150 mlxsw_afk_element_usage_fill(struct mlxsw_afk_element_usage *elusage,
151 const enum mlxsw_afk_element *elements,
152 unsigned int elements_count)
153 {
154 int i;
155
156 mlxsw_afk_element_usage_zero(elusage);
157 for (i = 0; i < elements_count; i++)
158 mlxsw_afk_element_usage_add(elusage, elements[i]);
159 }
160
161 static inline bool
mlxsw_afk_element_usage_subset(struct mlxsw_afk_element_usage * elusage_small,struct mlxsw_afk_element_usage * elusage_big)162 mlxsw_afk_element_usage_subset(struct mlxsw_afk_element_usage *elusage_small,
163 struct mlxsw_afk_element_usage *elusage_big)
164 {
165 int i;
166
167 for (i = 0; i < MLXSW_AFK_ELEMENT_MAX; i++)
168 if (test_bit(i, elusage_small->usage) &&
169 !test_bit(i, elusage_big->usage))
170 return false;
171 return true;
172 }
173
174 struct mlxsw_afk;
175
176 struct mlxsw_afk_ops {
177 const struct mlxsw_afk_block *blocks;
178 unsigned int blocks_count;
179 void (*encode_block)(char *output, int block_index, char *block);
180 void (*clear_block)(char *output, int block_index);
181 };
182
183 struct mlxsw_afk *mlxsw_afk_create(unsigned int max_blocks,
184 const struct mlxsw_afk_ops *ops);
185 void mlxsw_afk_destroy(struct mlxsw_afk *mlxsw_afk);
186
187 struct mlxsw_afk_key_info;
188
189 struct mlxsw_afk_key_info *
190 mlxsw_afk_key_info_get(struct mlxsw_afk *mlxsw_afk,
191 struct mlxsw_afk_element_usage *elusage);
192 void mlxsw_afk_key_info_put(struct mlxsw_afk_key_info *key_info);
193 bool mlxsw_afk_key_info_subset(struct mlxsw_afk_key_info *key_info,
194 struct mlxsw_afk_element_usage *elusage);
195
196 u16
197 mlxsw_afk_key_info_block_encoding_get(const struct mlxsw_afk_key_info *key_info,
198 int block_index);
199 unsigned int
200 mlxsw_afk_key_info_blocks_count_get(const struct mlxsw_afk_key_info *key_info);
201
202 struct mlxsw_afk_element_values {
203 struct mlxsw_afk_element_usage elusage;
204 struct {
205 char key[MLXSW_AFK_ELEMENT_STORAGE_SIZE];
206 char mask[MLXSW_AFK_ELEMENT_STORAGE_SIZE];
207 } storage;
208 };
209
210 void mlxsw_afk_values_add_u32(struct mlxsw_afk_element_values *values,
211 enum mlxsw_afk_element element,
212 u32 key_value, u32 mask_value);
213 void mlxsw_afk_values_add_buf(struct mlxsw_afk_element_values *values,
214 enum mlxsw_afk_element element,
215 const char *key_value, const char *mask_value,
216 unsigned int len);
217 void mlxsw_afk_encode(struct mlxsw_afk *mlxsw_afk,
218 struct mlxsw_afk_key_info *key_info,
219 struct mlxsw_afk_element_values *values,
220 char *key, char *mask);
221 void mlxsw_afk_clear(struct mlxsw_afk *mlxsw_afk, char *key,
222 int block_start, int block_end);
223
224 #endif
225