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464dce18 IS |
1 | /* |
2 | * drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | |
3 | * Copyright (c) 2016 Mellanox Technologies. All rights reserved. | |
4 | * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com> | |
5 | * Copyright (c) 2016 Ido Schimmel <idosch@mellanox.com> | |
6 | * | |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions are met: | |
9 | * | |
10 | * 1. Redistributions of source code must retain the above copyright | |
11 | * notice, this list of conditions and the following disclaimer. | |
12 | * 2. Redistributions in binary form must reproduce the above copyright | |
13 | * notice, this list of conditions and the following disclaimer in the | |
14 | * documentation and/or other materials provided with the distribution. | |
15 | * 3. Neither the names of the copyright holders nor the names of its | |
16 | * contributors may be used to endorse or promote products derived from | |
17 | * this software without specific prior written permission. | |
18 | * | |
19 | * Alternatively, this software may be distributed under the terms of the | |
20 | * GNU General Public License ("GPL") version 2 as published by the Free | |
21 | * Software Foundation. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
24 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
27 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
30 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
31 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
32 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
33 | * POSSIBILITY OF SUCH DAMAGE. | |
34 | */ | |
35 | ||
36 | #include <linux/kernel.h> | |
37 | #include <linux/types.h> | |
5e9c16cc JP |
38 | #include <linux/rhashtable.h> |
39 | #include <linux/bitops.h> | |
40 | #include <linux/in6.h> | |
464dce18 IS |
41 | |
42 | #include "spectrum.h" | |
43 | #include "core.h" | |
44 | #include "reg.h" | |
45 | ||
53342023 JP |
46 | #define mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) \ |
47 | for_each_set_bit(prefix, (prefix_usage)->b, MLXSW_SP_PREFIX_COUNT) | |
48 | ||
6b75c480 JP |
49 | static bool |
50 | mlxsw_sp_prefix_usage_subset(struct mlxsw_sp_prefix_usage *prefix_usage1, | |
51 | struct mlxsw_sp_prefix_usage *prefix_usage2) | |
52 | { | |
53 | unsigned char prefix; | |
54 | ||
55 | mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage1) { | |
56 | if (!test_bit(prefix, prefix_usage2->b)) | |
57 | return false; | |
58 | } | |
59 | return true; | |
60 | } | |
61 | ||
53342023 JP |
62 | static bool |
63 | mlxsw_sp_prefix_usage_eq(struct mlxsw_sp_prefix_usage *prefix_usage1, | |
64 | struct mlxsw_sp_prefix_usage *prefix_usage2) | |
65 | { | |
66 | return !memcmp(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1)); | |
67 | } | |
68 | ||
6b75c480 JP |
69 | static bool |
70 | mlxsw_sp_prefix_usage_none(struct mlxsw_sp_prefix_usage *prefix_usage) | |
71 | { | |
72 | struct mlxsw_sp_prefix_usage prefix_usage_none = {{ 0 } }; | |
73 | ||
74 | return mlxsw_sp_prefix_usage_eq(prefix_usage, &prefix_usage_none); | |
75 | } | |
76 | ||
77 | static void | |
78 | mlxsw_sp_prefix_usage_cpy(struct mlxsw_sp_prefix_usage *prefix_usage1, | |
79 | struct mlxsw_sp_prefix_usage *prefix_usage2) | |
80 | { | |
81 | memcpy(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1)); | |
82 | } | |
83 | ||
84 | static void | |
85 | mlxsw_sp_prefix_usage_zero(struct mlxsw_sp_prefix_usage *prefix_usage) | |
86 | { | |
87 | memset(prefix_usage, 0, sizeof(*prefix_usage)); | |
88 | } | |
89 | ||
5e9c16cc JP |
90 | static void |
91 | mlxsw_sp_prefix_usage_set(struct mlxsw_sp_prefix_usage *prefix_usage, | |
92 | unsigned char prefix_len) | |
93 | { | |
94 | set_bit(prefix_len, prefix_usage->b); | |
95 | } | |
96 | ||
97 | static void | |
98 | mlxsw_sp_prefix_usage_clear(struct mlxsw_sp_prefix_usage *prefix_usage, | |
99 | unsigned char prefix_len) | |
100 | { | |
101 | clear_bit(prefix_len, prefix_usage->b); | |
102 | } | |
103 | ||
104 | struct mlxsw_sp_fib_key { | |
105 | unsigned char addr[sizeof(struct in6_addr)]; | |
106 | unsigned char prefix_len; | |
107 | }; | |
108 | ||
109 | struct mlxsw_sp_fib_entry { | |
110 | struct rhash_head ht_node; | |
111 | struct mlxsw_sp_fib_key key; | |
112 | }; | |
113 | ||
114 | struct mlxsw_sp_fib { | |
115 | struct rhashtable ht; | |
116 | unsigned long prefix_ref_count[MLXSW_SP_PREFIX_COUNT]; | |
117 | struct mlxsw_sp_prefix_usage prefix_usage; | |
118 | }; | |
119 | ||
120 | static const struct rhashtable_params mlxsw_sp_fib_ht_params = { | |
121 | .key_offset = offsetof(struct mlxsw_sp_fib_entry, key), | |
122 | .head_offset = offsetof(struct mlxsw_sp_fib_entry, ht_node), | |
123 | .key_len = sizeof(struct mlxsw_sp_fib_key), | |
124 | .automatic_shrinking = true, | |
125 | }; | |
126 | ||
127 | static int mlxsw_sp_fib_entry_insert(struct mlxsw_sp_fib *fib, | |
128 | struct mlxsw_sp_fib_entry *fib_entry) | |
129 | { | |
130 | unsigned char prefix_len = fib_entry->key.prefix_len; | |
131 | int err; | |
132 | ||
133 | err = rhashtable_insert_fast(&fib->ht, &fib_entry->ht_node, | |
134 | mlxsw_sp_fib_ht_params); | |
135 | if (err) | |
136 | return err; | |
137 | if (fib->prefix_ref_count[prefix_len]++ == 0) | |
138 | mlxsw_sp_prefix_usage_set(&fib->prefix_usage, prefix_len); | |
139 | return 0; | |
140 | } | |
141 | ||
142 | static void mlxsw_sp_fib_entry_remove(struct mlxsw_sp_fib *fib, | |
143 | struct mlxsw_sp_fib_entry *fib_entry) | |
144 | { | |
145 | unsigned char prefix_len = fib_entry->key.prefix_len; | |
146 | ||
147 | if (--fib->prefix_ref_count[prefix_len] == 0) | |
148 | mlxsw_sp_prefix_usage_clear(&fib->prefix_usage, prefix_len); | |
149 | rhashtable_remove_fast(&fib->ht, &fib_entry->ht_node, | |
150 | mlxsw_sp_fib_ht_params); | |
151 | } | |
152 | ||
153 | static struct mlxsw_sp_fib_entry * | |
154 | mlxsw_sp_fib_entry_create(struct mlxsw_sp_fib *fib, const void *addr, | |
155 | size_t addr_len, unsigned char prefix_len) | |
156 | { | |
157 | struct mlxsw_sp_fib_entry *fib_entry; | |
158 | ||
159 | fib_entry = kzalloc(sizeof(*fib_entry), GFP_KERNEL); | |
160 | if (!fib_entry) | |
161 | return NULL; | |
162 | memcpy(fib_entry->key.addr, addr, addr_len); | |
163 | fib_entry->key.prefix_len = prefix_len; | |
164 | return fib_entry; | |
165 | } | |
166 | ||
167 | static void mlxsw_sp_fib_entry_destroy(struct mlxsw_sp_fib_entry *fib_entry) | |
168 | { | |
169 | kfree(fib_entry); | |
170 | } | |
171 | ||
172 | static struct mlxsw_sp_fib_entry * | |
173 | mlxsw_sp_fib_entry_lookup(struct mlxsw_sp_fib *fib, const void *addr, | |
174 | size_t addr_len, unsigned char prefix_len) | |
175 | { | |
176 | struct mlxsw_sp_fib_key key = {{ 0 } }; | |
177 | ||
178 | memcpy(key.addr, addr, addr_len); | |
179 | key.prefix_len = prefix_len; | |
180 | return rhashtable_lookup_fast(&fib->ht, &key, mlxsw_sp_fib_ht_params); | |
181 | } | |
182 | ||
183 | static struct mlxsw_sp_fib *mlxsw_sp_fib_create(void) | |
184 | { | |
185 | struct mlxsw_sp_fib *fib; | |
186 | int err; | |
187 | ||
188 | fib = kzalloc(sizeof(*fib), GFP_KERNEL); | |
189 | if (!fib) | |
190 | return ERR_PTR(-ENOMEM); | |
191 | err = rhashtable_init(&fib->ht, &mlxsw_sp_fib_ht_params); | |
192 | if (err) | |
193 | goto err_rhashtable_init; | |
194 | return fib; | |
195 | ||
196 | err_rhashtable_init: | |
197 | kfree(fib); | |
198 | return ERR_PTR(err); | |
199 | } | |
200 | ||
201 | static void mlxsw_sp_fib_destroy(struct mlxsw_sp_fib *fib) | |
202 | { | |
203 | rhashtable_destroy(&fib->ht); | |
204 | kfree(fib); | |
205 | } | |
206 | ||
53342023 JP |
207 | static struct mlxsw_sp_lpm_tree * |
208 | mlxsw_sp_lpm_tree_find_unused(struct mlxsw_sp *mlxsw_sp, bool one_reserved) | |
209 | { | |
210 | static struct mlxsw_sp_lpm_tree *lpm_tree; | |
211 | int i; | |
212 | ||
213 | for (i = 0; i < MLXSW_SP_LPM_TREE_COUNT; i++) { | |
214 | lpm_tree = &mlxsw_sp->router.lpm_trees[i]; | |
215 | if (lpm_tree->ref_count == 0) { | |
216 | if (one_reserved) | |
217 | one_reserved = false; | |
218 | else | |
219 | return lpm_tree; | |
220 | } | |
221 | } | |
222 | return NULL; | |
223 | } | |
224 | ||
225 | static int mlxsw_sp_lpm_tree_alloc(struct mlxsw_sp *mlxsw_sp, | |
226 | struct mlxsw_sp_lpm_tree *lpm_tree) | |
227 | { | |
228 | char ralta_pl[MLXSW_REG_RALTA_LEN]; | |
229 | ||
230 | mlxsw_reg_ralta_pack(ralta_pl, true, lpm_tree->proto, lpm_tree->id); | |
231 | return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); | |
232 | } | |
233 | ||
234 | static int mlxsw_sp_lpm_tree_free(struct mlxsw_sp *mlxsw_sp, | |
235 | struct mlxsw_sp_lpm_tree *lpm_tree) | |
236 | { | |
237 | char ralta_pl[MLXSW_REG_RALTA_LEN]; | |
238 | ||
239 | mlxsw_reg_ralta_pack(ralta_pl, false, lpm_tree->proto, lpm_tree->id); | |
240 | return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); | |
241 | } | |
242 | ||
243 | static int | |
244 | mlxsw_sp_lpm_tree_left_struct_set(struct mlxsw_sp *mlxsw_sp, | |
245 | struct mlxsw_sp_prefix_usage *prefix_usage, | |
246 | struct mlxsw_sp_lpm_tree *lpm_tree) | |
247 | { | |
248 | char ralst_pl[MLXSW_REG_RALST_LEN]; | |
249 | u8 root_bin = 0; | |
250 | u8 prefix; | |
251 | u8 last_prefix = MLXSW_REG_RALST_BIN_NO_CHILD; | |
252 | ||
253 | mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) | |
254 | root_bin = prefix; | |
255 | ||
256 | mlxsw_reg_ralst_pack(ralst_pl, root_bin, lpm_tree->id); | |
257 | mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) { | |
258 | if (prefix == 0) | |
259 | continue; | |
260 | mlxsw_reg_ralst_bin_pack(ralst_pl, prefix, last_prefix, | |
261 | MLXSW_REG_RALST_BIN_NO_CHILD); | |
262 | last_prefix = prefix; | |
263 | } | |
264 | return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst), ralst_pl); | |
265 | } | |
266 | ||
267 | static struct mlxsw_sp_lpm_tree * | |
268 | mlxsw_sp_lpm_tree_create(struct mlxsw_sp *mlxsw_sp, | |
269 | struct mlxsw_sp_prefix_usage *prefix_usage, | |
270 | enum mlxsw_sp_l3proto proto, bool one_reserved) | |
271 | { | |
272 | struct mlxsw_sp_lpm_tree *lpm_tree; | |
273 | int err; | |
274 | ||
275 | lpm_tree = mlxsw_sp_lpm_tree_find_unused(mlxsw_sp, one_reserved); | |
276 | if (!lpm_tree) | |
277 | return ERR_PTR(-EBUSY); | |
278 | lpm_tree->proto = proto; | |
279 | err = mlxsw_sp_lpm_tree_alloc(mlxsw_sp, lpm_tree); | |
280 | if (err) | |
281 | return ERR_PTR(err); | |
282 | ||
283 | err = mlxsw_sp_lpm_tree_left_struct_set(mlxsw_sp, prefix_usage, | |
284 | lpm_tree); | |
285 | if (err) | |
286 | goto err_left_struct_set; | |
287 | return lpm_tree; | |
288 | ||
289 | err_left_struct_set: | |
290 | mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree); | |
291 | return ERR_PTR(err); | |
292 | } | |
293 | ||
294 | static int mlxsw_sp_lpm_tree_destroy(struct mlxsw_sp *mlxsw_sp, | |
295 | struct mlxsw_sp_lpm_tree *lpm_tree) | |
296 | { | |
297 | return mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree); | |
298 | } | |
299 | ||
300 | static struct mlxsw_sp_lpm_tree * | |
301 | mlxsw_sp_lpm_tree_get(struct mlxsw_sp *mlxsw_sp, | |
302 | struct mlxsw_sp_prefix_usage *prefix_usage, | |
303 | enum mlxsw_sp_l3proto proto, bool one_reserved) | |
304 | { | |
305 | struct mlxsw_sp_lpm_tree *lpm_tree; | |
306 | int i; | |
307 | ||
308 | for (i = 0; i < MLXSW_SP_LPM_TREE_COUNT; i++) { | |
309 | lpm_tree = &mlxsw_sp->router.lpm_trees[i]; | |
310 | if (lpm_tree->proto == proto && | |
311 | mlxsw_sp_prefix_usage_eq(&lpm_tree->prefix_usage, | |
312 | prefix_usage)) | |
313 | goto inc_ref_count; | |
314 | } | |
315 | lpm_tree = mlxsw_sp_lpm_tree_create(mlxsw_sp, prefix_usage, | |
316 | proto, one_reserved); | |
317 | if (IS_ERR(lpm_tree)) | |
318 | return lpm_tree; | |
319 | ||
320 | inc_ref_count: | |
321 | lpm_tree->ref_count++; | |
322 | return lpm_tree; | |
323 | } | |
324 | ||
325 | static int mlxsw_sp_lpm_tree_put(struct mlxsw_sp *mlxsw_sp, | |
326 | struct mlxsw_sp_lpm_tree *lpm_tree) | |
327 | { | |
328 | if (--lpm_tree->ref_count == 0) | |
329 | return mlxsw_sp_lpm_tree_destroy(mlxsw_sp, lpm_tree); | |
330 | return 0; | |
331 | } | |
332 | ||
333 | static void mlxsw_sp_lpm_init(struct mlxsw_sp *mlxsw_sp) | |
334 | { | |
335 | struct mlxsw_sp_lpm_tree *lpm_tree; | |
336 | int i; | |
337 | ||
338 | for (i = 0; i < MLXSW_SP_LPM_TREE_COUNT; i++) { | |
339 | lpm_tree = &mlxsw_sp->router.lpm_trees[i]; | |
340 | lpm_tree->id = i + MLXSW_SP_LPM_TREE_MIN; | |
341 | } | |
342 | } | |
343 | ||
6b75c480 JP |
344 | static struct mlxsw_sp_vr *mlxsw_sp_vr_find_unused(struct mlxsw_sp *mlxsw_sp) |
345 | { | |
346 | struct mlxsw_sp_vr *vr; | |
347 | int i; | |
348 | ||
349 | for (i = 0; i < MLXSW_SP_VIRTUAL_ROUTER_MAX; i++) { | |
350 | vr = &mlxsw_sp->router.vrs[i]; | |
351 | if (!vr->used) | |
352 | return vr; | |
353 | } | |
354 | return NULL; | |
355 | } | |
356 | ||
357 | static int mlxsw_sp_vr_lpm_tree_bind(struct mlxsw_sp *mlxsw_sp, | |
358 | struct mlxsw_sp_vr *vr) | |
359 | { | |
360 | char raltb_pl[MLXSW_REG_RALTB_LEN]; | |
361 | ||
362 | mlxsw_reg_raltb_pack(raltb_pl, vr->id, vr->proto, vr->lpm_tree->id); | |
363 | return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl); | |
364 | } | |
365 | ||
366 | static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp, | |
367 | struct mlxsw_sp_vr *vr) | |
368 | { | |
369 | char raltb_pl[MLXSW_REG_RALTB_LEN]; | |
370 | ||
371 | /* Bind to tree 0 which is default */ | |
372 | mlxsw_reg_raltb_pack(raltb_pl, vr->id, vr->proto, 0); | |
373 | return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl); | |
374 | } | |
375 | ||
376 | static u32 mlxsw_sp_fix_tb_id(u32 tb_id) | |
377 | { | |
378 | /* For our purpose, squash main and local table into one */ | |
379 | if (tb_id == RT_TABLE_LOCAL) | |
380 | tb_id = RT_TABLE_MAIN; | |
381 | return tb_id; | |
382 | } | |
383 | ||
384 | static struct mlxsw_sp_vr *mlxsw_sp_vr_find(struct mlxsw_sp *mlxsw_sp, | |
385 | u32 tb_id, | |
386 | enum mlxsw_sp_l3proto proto) | |
387 | { | |
388 | struct mlxsw_sp_vr *vr; | |
389 | int i; | |
390 | ||
391 | tb_id = mlxsw_sp_fix_tb_id(tb_id); | |
392 | for (i = 0; i < MLXSW_SP_VIRTUAL_ROUTER_MAX; i++) { | |
393 | vr = &mlxsw_sp->router.vrs[i]; | |
394 | if (vr->used && vr->proto == proto && vr->tb_id == tb_id) | |
395 | return vr; | |
396 | } | |
397 | return NULL; | |
398 | } | |
399 | ||
400 | static struct mlxsw_sp_vr *mlxsw_sp_vr_create(struct mlxsw_sp *mlxsw_sp, | |
401 | unsigned char prefix_len, | |
402 | u32 tb_id, | |
403 | enum mlxsw_sp_l3proto proto) | |
404 | { | |
405 | struct mlxsw_sp_prefix_usage req_prefix_usage; | |
406 | struct mlxsw_sp_lpm_tree *lpm_tree; | |
407 | struct mlxsw_sp_vr *vr; | |
408 | int err; | |
409 | ||
410 | vr = mlxsw_sp_vr_find_unused(mlxsw_sp); | |
411 | if (!vr) | |
412 | return ERR_PTR(-EBUSY); | |
413 | vr->fib = mlxsw_sp_fib_create(); | |
414 | if (IS_ERR(vr->fib)) | |
415 | return ERR_CAST(vr->fib); | |
416 | ||
417 | vr->proto = proto; | |
418 | vr->tb_id = tb_id; | |
419 | mlxsw_sp_prefix_usage_zero(&req_prefix_usage); | |
420 | mlxsw_sp_prefix_usage_set(&req_prefix_usage, prefix_len); | |
421 | lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage, | |
422 | proto, true); | |
423 | if (IS_ERR(lpm_tree)) { | |
424 | err = PTR_ERR(lpm_tree); | |
425 | goto err_tree_get; | |
426 | } | |
427 | vr->lpm_tree = lpm_tree; | |
428 | err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, vr); | |
429 | if (err) | |
430 | goto err_tree_bind; | |
431 | ||
432 | vr->used = true; | |
433 | return vr; | |
434 | ||
435 | err_tree_bind: | |
436 | mlxsw_sp_lpm_tree_put(mlxsw_sp, vr->lpm_tree); | |
437 | err_tree_get: | |
438 | mlxsw_sp_fib_destroy(vr->fib); | |
439 | ||
440 | return ERR_PTR(err); | |
441 | } | |
442 | ||
443 | static void mlxsw_sp_vr_destroy(struct mlxsw_sp *mlxsw_sp, | |
444 | struct mlxsw_sp_vr *vr) | |
445 | { | |
446 | mlxsw_sp_vr_lpm_tree_unbind(mlxsw_sp, vr); | |
447 | mlxsw_sp_lpm_tree_put(mlxsw_sp, vr->lpm_tree); | |
448 | mlxsw_sp_fib_destroy(vr->fib); | |
449 | vr->used = false; | |
450 | } | |
451 | ||
452 | static int | |
453 | mlxsw_sp_vr_lpm_tree_check(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr, | |
454 | struct mlxsw_sp_prefix_usage *req_prefix_usage) | |
455 | { | |
456 | struct mlxsw_sp_lpm_tree *lpm_tree; | |
457 | ||
458 | if (mlxsw_sp_prefix_usage_eq(req_prefix_usage, | |
459 | &vr->lpm_tree->prefix_usage)) | |
460 | return 0; | |
461 | ||
462 | lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, req_prefix_usage, | |
463 | vr->proto, false); | |
464 | if (IS_ERR(lpm_tree)) { | |
465 | /* We failed to get a tree according to the required | |
466 | * prefix usage. However, the current tree might be still good | |
467 | * for us if our requirement is subset of the prefixes used | |
468 | * in the tree. | |
469 | */ | |
470 | if (mlxsw_sp_prefix_usage_subset(req_prefix_usage, | |
471 | &vr->lpm_tree->prefix_usage)) | |
472 | return 0; | |
473 | return PTR_ERR(lpm_tree); | |
474 | } | |
475 | ||
476 | mlxsw_sp_vr_lpm_tree_unbind(mlxsw_sp, vr); | |
477 | mlxsw_sp_lpm_tree_put(mlxsw_sp, vr->lpm_tree); | |
478 | vr->lpm_tree = lpm_tree; | |
479 | return mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, vr); | |
480 | } | |
481 | ||
482 | static struct mlxsw_sp_vr *mlxsw_sp_vr_get(struct mlxsw_sp *mlxsw_sp, | |
483 | unsigned char prefix_len, | |
484 | u32 tb_id, | |
485 | enum mlxsw_sp_l3proto proto) | |
486 | { | |
487 | struct mlxsw_sp_vr *vr; | |
488 | int err; | |
489 | ||
490 | tb_id = mlxsw_sp_fix_tb_id(tb_id); | |
491 | vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id, proto); | |
492 | if (!vr) { | |
493 | vr = mlxsw_sp_vr_create(mlxsw_sp, prefix_len, tb_id, proto); | |
494 | if (IS_ERR(vr)) | |
495 | return vr; | |
496 | } else { | |
497 | struct mlxsw_sp_prefix_usage req_prefix_usage; | |
498 | ||
499 | mlxsw_sp_prefix_usage_cpy(&req_prefix_usage, | |
500 | &vr->fib->prefix_usage); | |
501 | mlxsw_sp_prefix_usage_set(&req_prefix_usage, prefix_len); | |
502 | /* Need to replace LPM tree in case new prefix is required. */ | |
503 | err = mlxsw_sp_vr_lpm_tree_check(mlxsw_sp, vr, | |
504 | &req_prefix_usage); | |
505 | if (err) | |
506 | return ERR_PTR(err); | |
507 | } | |
508 | return vr; | |
509 | } | |
510 | ||
511 | static void mlxsw_sp_vr_put(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr) | |
512 | { | |
513 | /* Destroy virtual router entity in case the associated FIB is empty | |
514 | * and allow it to be used for other tables in future. Otherwise, | |
515 | * check if some prefix usage did not disappear and change tree if | |
516 | * that is the case. Note that in case new, smaller tree cannot be | |
517 | * allocated, the original one will be kept being used. | |
518 | */ | |
519 | if (mlxsw_sp_prefix_usage_none(&vr->fib->prefix_usage)) | |
520 | mlxsw_sp_vr_destroy(mlxsw_sp, vr); | |
521 | else | |
522 | mlxsw_sp_vr_lpm_tree_check(mlxsw_sp, vr, | |
523 | &vr->fib->prefix_usage); | |
524 | } | |
525 | ||
526 | static void mlxsw_sp_vrs_init(struct mlxsw_sp *mlxsw_sp) | |
527 | { | |
528 | struct mlxsw_sp_vr *vr; | |
529 | int i; | |
530 | ||
531 | for (i = 0; i < MLXSW_SP_VIRTUAL_ROUTER_MAX; i++) { | |
532 | vr = &mlxsw_sp->router.vrs[i]; | |
533 | vr->id = i; | |
534 | } | |
535 | } | |
536 | ||
464dce18 IS |
537 | static int __mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp) |
538 | { | |
539 | char rgcr_pl[MLXSW_REG_RGCR_LEN]; | |
540 | ||
541 | mlxsw_reg_rgcr_pack(rgcr_pl, true); | |
542 | mlxsw_reg_rgcr_max_router_interfaces_set(rgcr_pl, MLXSW_SP_RIF_MAX); | |
543 | return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl); | |
544 | } | |
545 | ||
546 | static void __mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp) | |
547 | { | |
548 | char rgcr_pl[MLXSW_REG_RGCR_LEN]; | |
549 | ||
550 | mlxsw_reg_rgcr_pack(rgcr_pl, false); | |
551 | mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl); | |
552 | } | |
553 | ||
554 | int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp) | |
555 | { | |
53342023 JP |
556 | int err; |
557 | ||
558 | err = __mlxsw_sp_router_init(mlxsw_sp); | |
559 | if (err) | |
560 | return err; | |
561 | mlxsw_sp_lpm_init(mlxsw_sp); | |
6b75c480 | 562 | mlxsw_sp_vrs_init(mlxsw_sp); |
53342023 | 563 | return 0; |
464dce18 IS |
564 | } |
565 | ||
566 | void mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp) | |
567 | { | |
568 | __mlxsw_sp_router_fini(mlxsw_sp); | |
569 | } |