1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /* Copyright (c) 2017-2018 Mellanox Technologies. All rights reserved */
3 
4 #include <linux/kernel.h>
5 #include <linux/slab.h>
6 
7 #include "reg.h"
8 #include "core.h"
9 #include "spectrum.h"
10 #include "spectrum_acl_tcam.h"
11 
12 struct mlxsw_sp1_acl_tcam_region {
13 	struct mlxsw_sp_acl_ctcam_region cregion;
14 	struct mlxsw_sp_acl_tcam_region *region;
15 	struct {
16 		struct mlxsw_sp_acl_ctcam_chunk cchunk;
17 		struct mlxsw_sp_acl_ctcam_entry centry;
18 		struct mlxsw_sp_acl_rule_info *rulei;
19 	} catchall;
20 };
21 
22 struct mlxsw_sp1_acl_tcam_chunk {
23 	struct mlxsw_sp_acl_ctcam_chunk cchunk;
24 };
25 
26 struct mlxsw_sp1_acl_tcam_entry {
27 	struct mlxsw_sp_acl_ctcam_entry centry;
28 };
29 
30 static int
31 mlxsw_sp1_acl_ctcam_region_entry_insert(struct mlxsw_sp_acl_ctcam_region *cregion,
32 					struct mlxsw_sp_acl_ctcam_entry *centry,
33 					const char *mask)
34 {
35 	return 0;
36 }
37 
38 static void
39 mlxsw_sp1_acl_ctcam_region_entry_remove(struct mlxsw_sp_acl_ctcam_region *cregion,
40 					struct mlxsw_sp_acl_ctcam_entry *centry)
41 {
42 }
43 
44 static const struct mlxsw_sp_acl_ctcam_region_ops
45 mlxsw_sp1_acl_ctcam_region_ops = {
46 	.entry_insert = mlxsw_sp1_acl_ctcam_region_entry_insert,
47 	.entry_remove = mlxsw_sp1_acl_ctcam_region_entry_remove,
48 };
49 
50 static int mlxsw_sp1_acl_tcam_init(struct mlxsw_sp *mlxsw_sp, void *priv,
51 				   struct mlxsw_sp_acl_tcam *tcam)
52 {
53 	return 0;
54 }
55 
56 static void mlxsw_sp1_acl_tcam_fini(struct mlxsw_sp *mlxsw_sp, void *priv)
57 {
58 }
59 
60 static int
61 mlxsw_sp1_acl_ctcam_region_catchall_add(struct mlxsw_sp *mlxsw_sp,
62 					struct mlxsw_sp1_acl_tcam_region *region)
63 {
64 	struct mlxsw_sp_acl_rule_info *rulei;
65 	int err;
66 
67 	mlxsw_sp_acl_ctcam_chunk_init(&region->cregion,
68 				      &region->catchall.cchunk,
69 				      MLXSW_SP_ACL_TCAM_CATCHALL_PRIO);
70 	rulei = mlxsw_sp_acl_rulei_create(mlxsw_sp->acl, NULL);
71 	if (IS_ERR(rulei)) {
72 		err = PTR_ERR(rulei);
73 		goto err_rulei_create;
74 	}
75 	err = mlxsw_sp_acl_rulei_act_continue(rulei);
76 	if (WARN_ON(err))
77 		goto err_rulei_act_continue;
78 	err = mlxsw_sp_acl_rulei_commit(rulei);
79 	if (err)
80 		goto err_rulei_commit;
81 	err = mlxsw_sp_acl_ctcam_entry_add(mlxsw_sp, &region->cregion,
82 					   &region->catchall.cchunk,
83 					   &region->catchall.centry,
84 					   rulei, false);
85 	if (err)
86 		goto err_entry_add;
87 	region->catchall.rulei = rulei;
88 	return 0;
89 
90 err_entry_add:
91 err_rulei_commit:
92 err_rulei_act_continue:
93 	mlxsw_sp_acl_rulei_destroy(rulei);
94 err_rulei_create:
95 	mlxsw_sp_acl_ctcam_chunk_fini(&region->catchall.cchunk);
96 	return err;
97 }
98 
99 static void
100 mlxsw_sp1_acl_ctcam_region_catchall_del(struct mlxsw_sp *mlxsw_sp,
101 					struct mlxsw_sp1_acl_tcam_region *region)
102 {
103 	struct mlxsw_sp_acl_rule_info *rulei = region->catchall.rulei;
104 
105 	mlxsw_sp_acl_ctcam_entry_del(mlxsw_sp, &region->cregion,
106 				     &region->catchall.cchunk,
107 				     &region->catchall.centry);
108 	mlxsw_sp_acl_rulei_destroy(rulei);
109 	mlxsw_sp_acl_ctcam_chunk_fini(&region->catchall.cchunk);
110 }
111 
112 static int
113 mlxsw_sp1_acl_tcam_region_init(struct mlxsw_sp *mlxsw_sp, void *region_priv,
114 			       void *tcam_priv,
115 			       struct mlxsw_sp_acl_tcam_region *_region,
116 			       void *hints_priv)
117 {
118 	struct mlxsw_sp1_acl_tcam_region *region = region_priv;
119 	int err;
120 
121 	err = mlxsw_sp_acl_ctcam_region_init(mlxsw_sp, &region->cregion,
122 					     _region,
123 					     &mlxsw_sp1_acl_ctcam_region_ops);
124 	if (err)
125 		return err;
126 	err = mlxsw_sp1_acl_ctcam_region_catchall_add(mlxsw_sp, region);
127 	if (err)
128 		goto err_catchall_add;
129 	region->region = _region;
130 	return 0;
131 
132 err_catchall_add:
133 	mlxsw_sp_acl_ctcam_region_fini(&region->cregion);
134 	return err;
135 }
136 
137 static void
138 mlxsw_sp1_acl_tcam_region_fini(struct mlxsw_sp *mlxsw_sp, void *region_priv)
139 {
140 	struct mlxsw_sp1_acl_tcam_region *region = region_priv;
141 
142 	mlxsw_sp1_acl_ctcam_region_catchall_del(mlxsw_sp, region);
143 	mlxsw_sp_acl_ctcam_region_fini(&region->cregion);
144 }
145 
146 static int
147 mlxsw_sp1_acl_tcam_region_associate(struct mlxsw_sp *mlxsw_sp,
148 				    struct mlxsw_sp_acl_tcam_region *region)
149 {
150 	return 0;
151 }
152 
153 static void mlxsw_sp1_acl_tcam_chunk_init(void *region_priv, void *chunk_priv,
154 					  unsigned int priority)
155 {
156 	struct mlxsw_sp1_acl_tcam_region *region = region_priv;
157 	struct mlxsw_sp1_acl_tcam_chunk *chunk = chunk_priv;
158 
159 	mlxsw_sp_acl_ctcam_chunk_init(&region->cregion, &chunk->cchunk,
160 				      priority);
161 }
162 
163 static void mlxsw_sp1_acl_tcam_chunk_fini(void *chunk_priv)
164 {
165 	struct mlxsw_sp1_acl_tcam_chunk *chunk = chunk_priv;
166 
167 	mlxsw_sp_acl_ctcam_chunk_fini(&chunk->cchunk);
168 }
169 
170 static int mlxsw_sp1_acl_tcam_entry_add(struct mlxsw_sp *mlxsw_sp,
171 					void *region_priv, void *chunk_priv,
172 					void *entry_priv,
173 					struct mlxsw_sp_acl_rule_info *rulei)
174 {
175 	struct mlxsw_sp1_acl_tcam_region *region = region_priv;
176 	struct mlxsw_sp1_acl_tcam_chunk *chunk = chunk_priv;
177 	struct mlxsw_sp1_acl_tcam_entry *entry = entry_priv;
178 
179 	return mlxsw_sp_acl_ctcam_entry_add(mlxsw_sp, &region->cregion,
180 					    &chunk->cchunk, &entry->centry,
181 					    rulei, false);
182 }
183 
184 static void mlxsw_sp1_acl_tcam_entry_del(struct mlxsw_sp *mlxsw_sp,
185 					 void *region_priv, void *chunk_priv,
186 					 void *entry_priv)
187 {
188 	struct mlxsw_sp1_acl_tcam_region *region = region_priv;
189 	struct mlxsw_sp1_acl_tcam_chunk *chunk = chunk_priv;
190 	struct mlxsw_sp1_acl_tcam_entry *entry = entry_priv;
191 
192 	mlxsw_sp_acl_ctcam_entry_del(mlxsw_sp, &region->cregion,
193 				     &chunk->cchunk, &entry->centry);
194 }
195 
196 static int
197 mlxsw_sp1_acl_tcam_entry_action_replace(struct mlxsw_sp *mlxsw_sp,
198 					void *region_priv, void *entry_priv,
199 					struct mlxsw_sp_acl_rule_info *rulei)
200 {
201 	return -EOPNOTSUPP;
202 }
203 
204 static int
205 mlxsw_sp1_acl_tcam_region_entry_activity_get(struct mlxsw_sp *mlxsw_sp,
206 					     struct mlxsw_sp_acl_tcam_region *_region,
207 					     unsigned int offset,
208 					     bool *activity)
209 {
210 	char ptce2_pl[MLXSW_REG_PTCE2_LEN];
211 	int err;
212 
213 	mlxsw_reg_ptce2_pack(ptce2_pl, true, MLXSW_REG_PTCE2_OP_QUERY_CLEAR_ON_READ,
214 			     _region->tcam_region_info, offset, 0);
215 	err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ptce2), ptce2_pl);
216 	if (err)
217 		return err;
218 	*activity = mlxsw_reg_ptce2_a_get(ptce2_pl);
219 	return 0;
220 }
221 
222 static int
223 mlxsw_sp1_acl_tcam_entry_activity_get(struct mlxsw_sp *mlxsw_sp,
224 				      void *region_priv, void *entry_priv,
225 				      bool *activity)
226 {
227 	struct mlxsw_sp1_acl_tcam_region *region = region_priv;
228 	struct mlxsw_sp1_acl_tcam_entry *entry = entry_priv;
229 	unsigned int offset;
230 
231 	offset = mlxsw_sp_acl_ctcam_entry_offset(&entry->centry);
232 	return mlxsw_sp1_acl_tcam_region_entry_activity_get(mlxsw_sp,
233 							    region->region,
234 							    offset, activity);
235 }
236 
237 const struct mlxsw_sp_acl_tcam_ops mlxsw_sp1_acl_tcam_ops = {
238 	.key_type		= MLXSW_REG_PTAR_KEY_TYPE_FLEX,
239 	.priv_size		= 0,
240 	.init			= mlxsw_sp1_acl_tcam_init,
241 	.fini			= mlxsw_sp1_acl_tcam_fini,
242 	.region_priv_size	= sizeof(struct mlxsw_sp1_acl_tcam_region),
243 	.region_init		= mlxsw_sp1_acl_tcam_region_init,
244 	.region_fini		= mlxsw_sp1_acl_tcam_region_fini,
245 	.region_associate	= mlxsw_sp1_acl_tcam_region_associate,
246 	.chunk_priv_size	= sizeof(struct mlxsw_sp1_acl_tcam_chunk),
247 	.chunk_init		= mlxsw_sp1_acl_tcam_chunk_init,
248 	.chunk_fini		= mlxsw_sp1_acl_tcam_chunk_fini,
249 	.entry_priv_size	= sizeof(struct mlxsw_sp1_acl_tcam_entry),
250 	.entry_add		= mlxsw_sp1_acl_tcam_entry_add,
251 	.entry_del		= mlxsw_sp1_acl_tcam_entry_del,
252 	.entry_action_replace	= mlxsw_sp1_acl_tcam_entry_action_replace,
253 	.entry_activity_get	= mlxsw_sp1_acl_tcam_entry_activity_get,
254 };
255