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 #include <linux/errno.h>
7 #include <linux/bitops.h>
8 #include <linux/list.h>
9 #include <linux/rhashtable.h>
10 #include <linux/netdevice.h>
11 #include <linux/mutex.h>
12 #include <trace/events/mlxsw.h>
13
14 #include "reg.h"
15 #include "core.h"
16 #include "resources.h"
17 #include "spectrum.h"
18 #include "spectrum_acl_tcam.h"
19 #include "core_acl_flex_keys.h"
20
mlxsw_sp_acl_tcam_priv_size(struct mlxsw_sp * mlxsw_sp)21 size_t mlxsw_sp_acl_tcam_priv_size(struct mlxsw_sp *mlxsw_sp)
22 {
23 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
24
25 return ops->priv_size;
26 }
27
28 #define MLXSW_SP_ACL_TCAM_VREGION_REHASH_INTRVL_DFLT 5000 /* ms */
29 #define MLXSW_SP_ACL_TCAM_VREGION_REHASH_INTRVL_MIN 3000 /* ms */
30 #define MLXSW_SP_ACL_TCAM_VREGION_REHASH_CREDITS 100 /* number of entries */
31
mlxsw_sp_acl_tcam_init(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam * tcam)32 int mlxsw_sp_acl_tcam_init(struct mlxsw_sp *mlxsw_sp,
33 struct mlxsw_sp_acl_tcam *tcam)
34 {
35 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
36 u64 max_tcam_regions;
37 u64 max_regions;
38 u64 max_groups;
39 size_t alloc_size;
40 int err;
41
42 mutex_init(&tcam->lock);
43 tcam->vregion_rehash_intrvl =
44 MLXSW_SP_ACL_TCAM_VREGION_REHASH_INTRVL_DFLT;
45 INIT_LIST_HEAD(&tcam->vregion_list);
46
47 max_tcam_regions = MLXSW_CORE_RES_GET(mlxsw_sp->core,
48 ACL_MAX_TCAM_REGIONS);
49 max_regions = MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_MAX_REGIONS);
50
51 /* Use 1:1 mapping between ACL region and TCAM region */
52 if (max_tcam_regions < max_regions)
53 max_regions = max_tcam_regions;
54
55 alloc_size = sizeof(tcam->used_regions[0]) * BITS_TO_LONGS(max_regions);
56 tcam->used_regions = kzalloc(alloc_size, GFP_KERNEL);
57 if (!tcam->used_regions)
58 return -ENOMEM;
59 tcam->max_regions = max_regions;
60
61 max_groups = MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_MAX_GROUPS);
62 alloc_size = sizeof(tcam->used_groups[0]) * BITS_TO_LONGS(max_groups);
63 tcam->used_groups = kzalloc(alloc_size, GFP_KERNEL);
64 if (!tcam->used_groups) {
65 err = -ENOMEM;
66 goto err_alloc_used_groups;
67 }
68 tcam->max_groups = max_groups;
69 tcam->max_group_size = MLXSW_CORE_RES_GET(mlxsw_sp->core,
70 ACL_MAX_GROUP_SIZE);
71
72 err = ops->init(mlxsw_sp, tcam->priv, tcam);
73 if (err)
74 goto err_tcam_init;
75
76 return 0;
77
78 err_tcam_init:
79 kfree(tcam->used_groups);
80 err_alloc_used_groups:
81 kfree(tcam->used_regions);
82 return err;
83 }
84
mlxsw_sp_acl_tcam_fini(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam * tcam)85 void mlxsw_sp_acl_tcam_fini(struct mlxsw_sp *mlxsw_sp,
86 struct mlxsw_sp_acl_tcam *tcam)
87 {
88 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
89
90 mutex_destroy(&tcam->lock);
91 ops->fini(mlxsw_sp, tcam->priv);
92 kfree(tcam->used_groups);
93 kfree(tcam->used_regions);
94 }
95
mlxsw_sp_acl_tcam_priority_get(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_rule_info * rulei,u32 * priority,bool fillup_priority)96 int mlxsw_sp_acl_tcam_priority_get(struct mlxsw_sp *mlxsw_sp,
97 struct mlxsw_sp_acl_rule_info *rulei,
98 u32 *priority, bool fillup_priority)
99 {
100 u64 max_priority;
101
102 if (!fillup_priority) {
103 *priority = 0;
104 return 0;
105 }
106
107 if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, KVD_SIZE))
108 return -EIO;
109
110 /* Priority range is 1..cap_kvd_size-1. */
111 max_priority = MLXSW_CORE_RES_GET(mlxsw_sp->core, KVD_SIZE) - 1;
112 if (rulei->priority >= max_priority)
113 return -EINVAL;
114
115 /* Unlike in TC, in HW, higher number means higher priority. */
116 *priority = max_priority - rulei->priority;
117 return 0;
118 }
119
mlxsw_sp_acl_tcam_region_id_get(struct mlxsw_sp_acl_tcam * tcam,u16 * p_id)120 static int mlxsw_sp_acl_tcam_region_id_get(struct mlxsw_sp_acl_tcam *tcam,
121 u16 *p_id)
122 {
123 u16 id;
124
125 id = find_first_zero_bit(tcam->used_regions, tcam->max_regions);
126 if (id < tcam->max_regions) {
127 __set_bit(id, tcam->used_regions);
128 *p_id = id;
129 return 0;
130 }
131 return -ENOBUFS;
132 }
133
mlxsw_sp_acl_tcam_region_id_put(struct mlxsw_sp_acl_tcam * tcam,u16 id)134 static void mlxsw_sp_acl_tcam_region_id_put(struct mlxsw_sp_acl_tcam *tcam,
135 u16 id)
136 {
137 __clear_bit(id, tcam->used_regions);
138 }
139
mlxsw_sp_acl_tcam_group_id_get(struct mlxsw_sp_acl_tcam * tcam,u16 * p_id)140 static int mlxsw_sp_acl_tcam_group_id_get(struct mlxsw_sp_acl_tcam *tcam,
141 u16 *p_id)
142 {
143 u16 id;
144
145 id = find_first_zero_bit(tcam->used_groups, tcam->max_groups);
146 if (id < tcam->max_groups) {
147 __set_bit(id, tcam->used_groups);
148 *p_id = id;
149 return 0;
150 }
151 return -ENOBUFS;
152 }
153
mlxsw_sp_acl_tcam_group_id_put(struct mlxsw_sp_acl_tcam * tcam,u16 id)154 static void mlxsw_sp_acl_tcam_group_id_put(struct mlxsw_sp_acl_tcam *tcam,
155 u16 id)
156 {
157 __clear_bit(id, tcam->used_groups);
158 }
159
160 struct mlxsw_sp_acl_tcam_pattern {
161 const enum mlxsw_afk_element *elements;
162 unsigned int elements_count;
163 };
164
165 struct mlxsw_sp_acl_tcam_group {
166 struct mlxsw_sp_acl_tcam *tcam;
167 u16 id;
168 struct mutex lock; /* guards region list updates */
169 struct list_head region_list;
170 unsigned int region_count;
171 };
172
173 struct mlxsw_sp_acl_tcam_vgroup {
174 struct mlxsw_sp_acl_tcam_group group;
175 struct list_head vregion_list;
176 struct rhashtable vchunk_ht;
177 const struct mlxsw_sp_acl_tcam_pattern *patterns;
178 unsigned int patterns_count;
179 bool tmplt_elusage_set;
180 struct mlxsw_afk_element_usage tmplt_elusage;
181 bool vregion_rehash_enabled;
182 unsigned int *p_min_prio;
183 unsigned int *p_max_prio;
184 };
185
186 struct mlxsw_sp_acl_tcam_rehash_ctx {
187 void *hints_priv;
188 bool this_is_rollback;
189 struct mlxsw_sp_acl_tcam_vchunk *current_vchunk; /* vchunk being
190 * currently migrated.
191 */
192 struct mlxsw_sp_acl_tcam_ventry *start_ventry; /* ventry to start
193 * migration from in
194 * a vchunk being
195 * currently migrated.
196 */
197 struct mlxsw_sp_acl_tcam_ventry *stop_ventry; /* ventry to stop
198 * migration at
199 * a vchunk being
200 * currently migrated.
201 */
202 };
203
204 struct mlxsw_sp_acl_tcam_vregion {
205 struct mutex lock; /* Protects consistency of region, region2 pointers
206 * and vchunk_list.
207 */
208 struct mlxsw_sp_acl_tcam_region *region;
209 struct mlxsw_sp_acl_tcam_region *region2; /* Used during migration */
210 struct list_head list; /* Member of a TCAM group */
211 struct list_head tlist; /* Member of a TCAM */
212 struct list_head vchunk_list; /* List of vchunks under this vregion */
213 struct mlxsw_afk_key_info *key_info;
214 struct mlxsw_sp_acl_tcam *tcam;
215 struct mlxsw_sp_acl_tcam_vgroup *vgroup;
216 struct {
217 struct delayed_work dw;
218 struct mlxsw_sp_acl_tcam_rehash_ctx ctx;
219 } rehash;
220 struct mlxsw_sp *mlxsw_sp;
221 unsigned int ref_count;
222 };
223
224 struct mlxsw_sp_acl_tcam_vchunk;
225
226 struct mlxsw_sp_acl_tcam_chunk {
227 struct mlxsw_sp_acl_tcam_vchunk *vchunk;
228 struct mlxsw_sp_acl_tcam_region *region;
229 unsigned long priv[];
230 /* priv has to be always the last item */
231 };
232
233 struct mlxsw_sp_acl_tcam_vchunk {
234 struct mlxsw_sp_acl_tcam_chunk *chunk;
235 struct mlxsw_sp_acl_tcam_chunk *chunk2; /* Used during migration */
236 struct list_head list; /* Member of a TCAM vregion */
237 struct rhash_head ht_node; /* Member of a chunk HT */
238 struct list_head ventry_list;
239 unsigned int priority; /* Priority within the vregion and group */
240 struct mlxsw_sp_acl_tcam_vgroup *vgroup;
241 struct mlxsw_sp_acl_tcam_vregion *vregion;
242 unsigned int ref_count;
243 };
244
245 struct mlxsw_sp_acl_tcam_entry {
246 struct mlxsw_sp_acl_tcam_ventry *ventry;
247 struct mlxsw_sp_acl_tcam_chunk *chunk;
248 unsigned long priv[];
249 /* priv has to be always the last item */
250 };
251
252 struct mlxsw_sp_acl_tcam_ventry {
253 struct mlxsw_sp_acl_tcam_entry *entry;
254 struct list_head list; /* Member of a TCAM vchunk */
255 struct mlxsw_sp_acl_tcam_vchunk *vchunk;
256 struct mlxsw_sp_acl_rule_info *rulei;
257 };
258
259 static const struct rhashtable_params mlxsw_sp_acl_tcam_vchunk_ht_params = {
260 .key_len = sizeof(unsigned int),
261 .key_offset = offsetof(struct mlxsw_sp_acl_tcam_vchunk, priority),
262 .head_offset = offsetof(struct mlxsw_sp_acl_tcam_vchunk, ht_node),
263 .automatic_shrinking = true,
264 };
265
mlxsw_sp_acl_tcam_group_update(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_group * group)266 static int mlxsw_sp_acl_tcam_group_update(struct mlxsw_sp *mlxsw_sp,
267 struct mlxsw_sp_acl_tcam_group *group)
268 {
269 struct mlxsw_sp_acl_tcam_region *region;
270 char pagt_pl[MLXSW_REG_PAGT_LEN];
271 int acl_index = 0;
272
273 mlxsw_reg_pagt_pack(pagt_pl, group->id);
274 list_for_each_entry(region, &group->region_list, list) {
275 bool multi = false;
276
277 /* Check if the next entry in the list has the same vregion. */
278 if (region->list.next != &group->region_list &&
279 list_next_entry(region, list)->vregion == region->vregion)
280 multi = true;
281 mlxsw_reg_pagt_acl_id_pack(pagt_pl, acl_index++,
282 region->id, multi);
283 }
284 mlxsw_reg_pagt_size_set(pagt_pl, acl_index);
285 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pagt), pagt_pl);
286 }
287
288 static int
mlxsw_sp_acl_tcam_group_add(struct mlxsw_sp_acl_tcam * tcam,struct mlxsw_sp_acl_tcam_group * group)289 mlxsw_sp_acl_tcam_group_add(struct mlxsw_sp_acl_tcam *tcam,
290 struct mlxsw_sp_acl_tcam_group *group)
291 {
292 int err;
293
294 group->tcam = tcam;
295 INIT_LIST_HEAD(&group->region_list);
296
297 err = mlxsw_sp_acl_tcam_group_id_get(tcam, &group->id);
298 if (err)
299 return err;
300
301 mutex_init(&group->lock);
302
303 return 0;
304 }
305
mlxsw_sp_acl_tcam_group_del(struct mlxsw_sp_acl_tcam_group * group)306 static void mlxsw_sp_acl_tcam_group_del(struct mlxsw_sp_acl_tcam_group *group)
307 {
308 struct mlxsw_sp_acl_tcam *tcam = group->tcam;
309
310 mutex_destroy(&group->lock);
311 mlxsw_sp_acl_tcam_group_id_put(tcam, group->id);
312 WARN_ON(!list_empty(&group->region_list));
313 }
314
315 static int
mlxsw_sp_acl_tcam_vgroup_add(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam * tcam,struct mlxsw_sp_acl_tcam_vgroup * vgroup,const struct mlxsw_sp_acl_tcam_pattern * patterns,unsigned int patterns_count,struct mlxsw_afk_element_usage * tmplt_elusage,bool vregion_rehash_enabled,unsigned int * p_min_prio,unsigned int * p_max_prio)316 mlxsw_sp_acl_tcam_vgroup_add(struct mlxsw_sp *mlxsw_sp,
317 struct mlxsw_sp_acl_tcam *tcam,
318 struct mlxsw_sp_acl_tcam_vgroup *vgroup,
319 const struct mlxsw_sp_acl_tcam_pattern *patterns,
320 unsigned int patterns_count,
321 struct mlxsw_afk_element_usage *tmplt_elusage,
322 bool vregion_rehash_enabled,
323 unsigned int *p_min_prio,
324 unsigned int *p_max_prio)
325 {
326 int err;
327
328 vgroup->patterns = patterns;
329 vgroup->patterns_count = patterns_count;
330 vgroup->vregion_rehash_enabled = vregion_rehash_enabled;
331 vgroup->p_min_prio = p_min_prio;
332 vgroup->p_max_prio = p_max_prio;
333
334 if (tmplt_elusage) {
335 vgroup->tmplt_elusage_set = true;
336 memcpy(&vgroup->tmplt_elusage, tmplt_elusage,
337 sizeof(vgroup->tmplt_elusage));
338 }
339 INIT_LIST_HEAD(&vgroup->vregion_list);
340
341 err = mlxsw_sp_acl_tcam_group_add(tcam, &vgroup->group);
342 if (err)
343 return err;
344
345 err = rhashtable_init(&vgroup->vchunk_ht,
346 &mlxsw_sp_acl_tcam_vchunk_ht_params);
347 if (err)
348 goto err_rhashtable_init;
349
350 return 0;
351
352 err_rhashtable_init:
353 mlxsw_sp_acl_tcam_group_del(&vgroup->group);
354 return err;
355 }
356
357 static void
mlxsw_sp_acl_tcam_vgroup_del(struct mlxsw_sp_acl_tcam_vgroup * vgroup)358 mlxsw_sp_acl_tcam_vgroup_del(struct mlxsw_sp_acl_tcam_vgroup *vgroup)
359 {
360 rhashtable_destroy(&vgroup->vchunk_ht);
361 mlxsw_sp_acl_tcam_group_del(&vgroup->group);
362 WARN_ON(!list_empty(&vgroup->vregion_list));
363 }
364
365 static int
mlxsw_sp_acl_tcam_group_bind(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_group * group,struct mlxsw_sp_port * mlxsw_sp_port,bool ingress)366 mlxsw_sp_acl_tcam_group_bind(struct mlxsw_sp *mlxsw_sp,
367 struct mlxsw_sp_acl_tcam_group *group,
368 struct mlxsw_sp_port *mlxsw_sp_port,
369 bool ingress)
370 {
371 char ppbt_pl[MLXSW_REG_PPBT_LEN];
372
373 mlxsw_reg_ppbt_pack(ppbt_pl, ingress ? MLXSW_REG_PXBT_E_IACL :
374 MLXSW_REG_PXBT_E_EACL,
375 MLXSW_REG_PXBT_OP_BIND, mlxsw_sp_port->local_port,
376 group->id);
377 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ppbt), ppbt_pl);
378 }
379
380 static void
mlxsw_sp_acl_tcam_group_unbind(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_group * group,struct mlxsw_sp_port * mlxsw_sp_port,bool ingress)381 mlxsw_sp_acl_tcam_group_unbind(struct mlxsw_sp *mlxsw_sp,
382 struct mlxsw_sp_acl_tcam_group *group,
383 struct mlxsw_sp_port *mlxsw_sp_port,
384 bool ingress)
385 {
386 char ppbt_pl[MLXSW_REG_PPBT_LEN];
387
388 mlxsw_reg_ppbt_pack(ppbt_pl, ingress ? MLXSW_REG_PXBT_E_IACL :
389 MLXSW_REG_PXBT_E_EACL,
390 MLXSW_REG_PXBT_OP_UNBIND, mlxsw_sp_port->local_port,
391 group->id);
392 mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ppbt), ppbt_pl);
393 }
394
395 static u16
mlxsw_sp_acl_tcam_group_id(struct mlxsw_sp_acl_tcam_group * group)396 mlxsw_sp_acl_tcam_group_id(struct mlxsw_sp_acl_tcam_group *group)
397 {
398 return group->id;
399 }
400
401 static unsigned int
mlxsw_sp_acl_tcam_vregion_prio(struct mlxsw_sp_acl_tcam_vregion * vregion)402 mlxsw_sp_acl_tcam_vregion_prio(struct mlxsw_sp_acl_tcam_vregion *vregion)
403 {
404 struct mlxsw_sp_acl_tcam_vchunk *vchunk;
405
406 if (list_empty(&vregion->vchunk_list))
407 return 0;
408 /* As a priority of a vregion, return priority of the first vchunk */
409 vchunk = list_first_entry(&vregion->vchunk_list,
410 typeof(*vchunk), list);
411 return vchunk->priority;
412 }
413
414 static unsigned int
mlxsw_sp_acl_tcam_vregion_max_prio(struct mlxsw_sp_acl_tcam_vregion * vregion)415 mlxsw_sp_acl_tcam_vregion_max_prio(struct mlxsw_sp_acl_tcam_vregion *vregion)
416 {
417 struct mlxsw_sp_acl_tcam_vchunk *vchunk;
418
419 if (list_empty(&vregion->vchunk_list))
420 return 0;
421 vchunk = list_last_entry(&vregion->vchunk_list,
422 typeof(*vchunk), list);
423 return vchunk->priority;
424 }
425
426 static void
mlxsw_sp_acl_tcam_vgroup_prio_update(struct mlxsw_sp_acl_tcam_vgroup * vgroup)427 mlxsw_sp_acl_tcam_vgroup_prio_update(struct mlxsw_sp_acl_tcam_vgroup *vgroup)
428 {
429 struct mlxsw_sp_acl_tcam_vregion *vregion;
430
431 if (list_empty(&vgroup->vregion_list))
432 return;
433 vregion = list_first_entry(&vgroup->vregion_list,
434 typeof(*vregion), list);
435 *vgroup->p_min_prio = mlxsw_sp_acl_tcam_vregion_prio(vregion);
436 vregion = list_last_entry(&vgroup->vregion_list,
437 typeof(*vregion), list);
438 *vgroup->p_max_prio = mlxsw_sp_acl_tcam_vregion_max_prio(vregion);
439 }
440
441 static int
mlxsw_sp_acl_tcam_group_region_attach(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_group * group,struct mlxsw_sp_acl_tcam_region * region,unsigned int priority,struct mlxsw_sp_acl_tcam_region * next_region)442 mlxsw_sp_acl_tcam_group_region_attach(struct mlxsw_sp *mlxsw_sp,
443 struct mlxsw_sp_acl_tcam_group *group,
444 struct mlxsw_sp_acl_tcam_region *region,
445 unsigned int priority,
446 struct mlxsw_sp_acl_tcam_region *next_region)
447 {
448 struct mlxsw_sp_acl_tcam_region *region2;
449 struct list_head *pos;
450 int err;
451
452 mutex_lock(&group->lock);
453 if (group->region_count == group->tcam->max_group_size) {
454 err = -ENOBUFS;
455 goto err_region_count_check;
456 }
457
458 if (next_region) {
459 /* If the next region is defined, place the new one
460 * before it. The next one is a sibling.
461 */
462 pos = &next_region->list;
463 } else {
464 /* Position the region inside the list according to priority */
465 list_for_each(pos, &group->region_list) {
466 region2 = list_entry(pos, typeof(*region2), list);
467 if (mlxsw_sp_acl_tcam_vregion_prio(region2->vregion) >
468 priority)
469 break;
470 }
471 }
472 list_add_tail(®ion->list, pos);
473 region->group = group;
474
475 err = mlxsw_sp_acl_tcam_group_update(mlxsw_sp, group);
476 if (err)
477 goto err_group_update;
478
479 group->region_count++;
480 mutex_unlock(&group->lock);
481 return 0;
482
483 err_group_update:
484 list_del(®ion->list);
485 err_region_count_check:
486 mutex_unlock(&group->lock);
487 return err;
488 }
489
490 static void
mlxsw_sp_acl_tcam_group_region_detach(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_region * region)491 mlxsw_sp_acl_tcam_group_region_detach(struct mlxsw_sp *mlxsw_sp,
492 struct mlxsw_sp_acl_tcam_region *region)
493 {
494 struct mlxsw_sp_acl_tcam_group *group = region->group;
495
496 mutex_lock(&group->lock);
497 list_del(®ion->list);
498 group->region_count--;
499 mlxsw_sp_acl_tcam_group_update(mlxsw_sp, group);
500 mutex_unlock(&group->lock);
501 }
502
503 static int
mlxsw_sp_acl_tcam_vgroup_vregion_attach(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vgroup * vgroup,struct mlxsw_sp_acl_tcam_vregion * vregion,unsigned int priority)504 mlxsw_sp_acl_tcam_vgroup_vregion_attach(struct mlxsw_sp *mlxsw_sp,
505 struct mlxsw_sp_acl_tcam_vgroup *vgroup,
506 struct mlxsw_sp_acl_tcam_vregion *vregion,
507 unsigned int priority)
508 {
509 struct mlxsw_sp_acl_tcam_vregion *vregion2;
510 struct list_head *pos;
511 int err;
512
513 /* Position the vregion inside the list according to priority */
514 list_for_each(pos, &vgroup->vregion_list) {
515 vregion2 = list_entry(pos, typeof(*vregion2), list);
516 if (mlxsw_sp_acl_tcam_vregion_prio(vregion2) > priority)
517 break;
518 }
519 list_add_tail(&vregion->list, pos);
520
521 err = mlxsw_sp_acl_tcam_group_region_attach(mlxsw_sp, &vgroup->group,
522 vregion->region,
523 priority, NULL);
524 if (err)
525 goto err_region_attach;
526
527 return 0;
528
529 err_region_attach:
530 list_del(&vregion->list);
531 return err;
532 }
533
534 static void
mlxsw_sp_acl_tcam_vgroup_vregion_detach(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vregion * vregion)535 mlxsw_sp_acl_tcam_vgroup_vregion_detach(struct mlxsw_sp *mlxsw_sp,
536 struct mlxsw_sp_acl_tcam_vregion *vregion)
537 {
538 list_del(&vregion->list);
539 if (vregion->region2)
540 mlxsw_sp_acl_tcam_group_region_detach(mlxsw_sp,
541 vregion->region2);
542 mlxsw_sp_acl_tcam_group_region_detach(mlxsw_sp, vregion->region);
543 }
544
545 static struct mlxsw_sp_acl_tcam_vregion *
mlxsw_sp_acl_tcam_vgroup_vregion_find(struct mlxsw_sp_acl_tcam_vgroup * vgroup,unsigned int priority,struct mlxsw_afk_element_usage * elusage,bool * p_need_split)546 mlxsw_sp_acl_tcam_vgroup_vregion_find(struct mlxsw_sp_acl_tcam_vgroup *vgroup,
547 unsigned int priority,
548 struct mlxsw_afk_element_usage *elusage,
549 bool *p_need_split)
550 {
551 struct mlxsw_sp_acl_tcam_vregion *vregion, *vregion2;
552 struct list_head *pos;
553 bool issubset;
554
555 list_for_each(pos, &vgroup->vregion_list) {
556 vregion = list_entry(pos, typeof(*vregion), list);
557
558 /* First, check if the requested priority does not rather belong
559 * under some of the next vregions.
560 */
561 if (pos->next != &vgroup->vregion_list) { /* not last */
562 vregion2 = list_entry(pos->next, typeof(*vregion2),
563 list);
564 if (priority >=
565 mlxsw_sp_acl_tcam_vregion_prio(vregion2))
566 continue;
567 }
568
569 issubset = mlxsw_afk_key_info_subset(vregion->key_info,
570 elusage);
571
572 /* If requested element usage would not fit and the priority
573 * is lower than the currently inspected vregion we cannot
574 * use this region, so return NULL to indicate new vregion has
575 * to be created.
576 */
577 if (!issubset &&
578 priority < mlxsw_sp_acl_tcam_vregion_prio(vregion))
579 return NULL;
580
581 /* If requested element usage would not fit and the priority
582 * is higher than the currently inspected vregion we cannot
583 * use this vregion. There is still some hope that the next
584 * vregion would be the fit. So let it be processed and
585 * eventually break at the check right above this.
586 */
587 if (!issubset &&
588 priority > mlxsw_sp_acl_tcam_vregion_max_prio(vregion))
589 continue;
590
591 /* Indicate if the vregion needs to be split in order to add
592 * the requested priority. Split is needed when requested
593 * element usage won't fit into the found vregion.
594 */
595 *p_need_split = !issubset;
596 return vregion;
597 }
598 return NULL; /* New vregion has to be created. */
599 }
600
601 static void
mlxsw_sp_acl_tcam_vgroup_use_patterns(struct mlxsw_sp_acl_tcam_vgroup * vgroup,struct mlxsw_afk_element_usage * elusage,struct mlxsw_afk_element_usage * out)602 mlxsw_sp_acl_tcam_vgroup_use_patterns(struct mlxsw_sp_acl_tcam_vgroup *vgroup,
603 struct mlxsw_afk_element_usage *elusage,
604 struct mlxsw_afk_element_usage *out)
605 {
606 const struct mlxsw_sp_acl_tcam_pattern *pattern;
607 int i;
608
609 /* In case the template is set, we don't have to look up the pattern
610 * and just use the template.
611 */
612 if (vgroup->tmplt_elusage_set) {
613 memcpy(out, &vgroup->tmplt_elusage, sizeof(*out));
614 WARN_ON(!mlxsw_afk_element_usage_subset(elusage, out));
615 return;
616 }
617
618 for (i = 0; i < vgroup->patterns_count; i++) {
619 pattern = &vgroup->patterns[i];
620 mlxsw_afk_element_usage_fill(out, pattern->elements,
621 pattern->elements_count);
622 if (mlxsw_afk_element_usage_subset(elusage, out))
623 return;
624 }
625 memcpy(out, elusage, sizeof(*out));
626 }
627
628 static int
mlxsw_sp_acl_tcam_region_alloc(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_region * region)629 mlxsw_sp_acl_tcam_region_alloc(struct mlxsw_sp *mlxsw_sp,
630 struct mlxsw_sp_acl_tcam_region *region)
631 {
632 struct mlxsw_afk_key_info *key_info = region->key_info;
633 char ptar_pl[MLXSW_REG_PTAR_LEN];
634 unsigned int encodings_count;
635 int i;
636 int err;
637
638 mlxsw_reg_ptar_pack(ptar_pl, MLXSW_REG_PTAR_OP_ALLOC,
639 region->key_type,
640 MLXSW_SP_ACL_TCAM_REGION_BASE_COUNT,
641 region->id, region->tcam_region_info);
642 encodings_count = mlxsw_afk_key_info_blocks_count_get(key_info);
643 for (i = 0; i < encodings_count; i++) {
644 u16 encoding;
645
646 encoding = mlxsw_afk_key_info_block_encoding_get(key_info, i);
647 mlxsw_reg_ptar_key_id_pack(ptar_pl, i, encoding);
648 }
649 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptar), ptar_pl);
650 if (err)
651 return err;
652 mlxsw_reg_ptar_unpack(ptar_pl, region->tcam_region_info);
653 return 0;
654 }
655
656 static void
mlxsw_sp_acl_tcam_region_free(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_region * region)657 mlxsw_sp_acl_tcam_region_free(struct mlxsw_sp *mlxsw_sp,
658 struct mlxsw_sp_acl_tcam_region *region)
659 {
660 char ptar_pl[MLXSW_REG_PTAR_LEN];
661
662 mlxsw_reg_ptar_pack(ptar_pl, MLXSW_REG_PTAR_OP_FREE,
663 region->key_type, 0, region->id,
664 region->tcam_region_info);
665 mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptar), ptar_pl);
666 }
667
668 static int
mlxsw_sp_acl_tcam_region_enable(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_region * region)669 mlxsw_sp_acl_tcam_region_enable(struct mlxsw_sp *mlxsw_sp,
670 struct mlxsw_sp_acl_tcam_region *region)
671 {
672 char pacl_pl[MLXSW_REG_PACL_LEN];
673
674 mlxsw_reg_pacl_pack(pacl_pl, region->id, true,
675 region->tcam_region_info);
676 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pacl), pacl_pl);
677 }
678
679 static void
mlxsw_sp_acl_tcam_region_disable(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_region * region)680 mlxsw_sp_acl_tcam_region_disable(struct mlxsw_sp *mlxsw_sp,
681 struct mlxsw_sp_acl_tcam_region *region)
682 {
683 char pacl_pl[MLXSW_REG_PACL_LEN];
684
685 mlxsw_reg_pacl_pack(pacl_pl, region->id, false,
686 region->tcam_region_info);
687 mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pacl), pacl_pl);
688 }
689
690 static struct mlxsw_sp_acl_tcam_region *
mlxsw_sp_acl_tcam_region_create(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam * tcam,struct mlxsw_sp_acl_tcam_vregion * vregion,void * hints_priv)691 mlxsw_sp_acl_tcam_region_create(struct mlxsw_sp *mlxsw_sp,
692 struct mlxsw_sp_acl_tcam *tcam,
693 struct mlxsw_sp_acl_tcam_vregion *vregion,
694 void *hints_priv)
695 {
696 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
697 struct mlxsw_sp_acl_tcam_region *region;
698 int err;
699
700 region = kzalloc(sizeof(*region) + ops->region_priv_size, GFP_KERNEL);
701 if (!region)
702 return ERR_PTR(-ENOMEM);
703 region->mlxsw_sp = mlxsw_sp;
704 region->vregion = vregion;
705 region->key_info = vregion->key_info;
706
707 err = mlxsw_sp_acl_tcam_region_id_get(tcam, ®ion->id);
708 if (err)
709 goto err_region_id_get;
710
711 err = ops->region_associate(mlxsw_sp, region);
712 if (err)
713 goto err_tcam_region_associate;
714
715 region->key_type = ops->key_type;
716 err = mlxsw_sp_acl_tcam_region_alloc(mlxsw_sp, region);
717 if (err)
718 goto err_tcam_region_alloc;
719
720 err = mlxsw_sp_acl_tcam_region_enable(mlxsw_sp, region);
721 if (err)
722 goto err_tcam_region_enable;
723
724 err = ops->region_init(mlxsw_sp, region->priv, tcam->priv,
725 region, hints_priv);
726 if (err)
727 goto err_tcam_region_init;
728
729 return region;
730
731 err_tcam_region_init:
732 mlxsw_sp_acl_tcam_region_disable(mlxsw_sp, region);
733 err_tcam_region_enable:
734 mlxsw_sp_acl_tcam_region_free(mlxsw_sp, region);
735 err_tcam_region_alloc:
736 err_tcam_region_associate:
737 mlxsw_sp_acl_tcam_region_id_put(tcam, region->id);
738 err_region_id_get:
739 kfree(region);
740 return ERR_PTR(err);
741 }
742
743 static void
mlxsw_sp_acl_tcam_region_destroy(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_region * region)744 mlxsw_sp_acl_tcam_region_destroy(struct mlxsw_sp *mlxsw_sp,
745 struct mlxsw_sp_acl_tcam_region *region)
746 {
747 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
748
749 ops->region_fini(mlxsw_sp, region->priv);
750 mlxsw_sp_acl_tcam_region_disable(mlxsw_sp, region);
751 mlxsw_sp_acl_tcam_region_free(mlxsw_sp, region);
752 mlxsw_sp_acl_tcam_region_id_put(region->group->tcam,
753 region->id);
754 kfree(region);
755 }
756
757 static void
mlxsw_sp_acl_tcam_vregion_rehash_work_schedule(struct mlxsw_sp_acl_tcam_vregion * vregion)758 mlxsw_sp_acl_tcam_vregion_rehash_work_schedule(struct mlxsw_sp_acl_tcam_vregion *vregion)
759 {
760 unsigned long interval = vregion->tcam->vregion_rehash_intrvl;
761
762 if (!interval)
763 return;
764 mlxsw_core_schedule_dw(&vregion->rehash.dw,
765 msecs_to_jiffies(interval));
766 }
767
768 static void
769 mlxsw_sp_acl_tcam_vregion_rehash(struct mlxsw_sp *mlxsw_sp,
770 struct mlxsw_sp_acl_tcam_vregion *vregion,
771 int *credits);
772
mlxsw_sp_acl_tcam_vregion_rehash_work(struct work_struct * work)773 static void mlxsw_sp_acl_tcam_vregion_rehash_work(struct work_struct *work)
774 {
775 struct mlxsw_sp_acl_tcam_vregion *vregion =
776 container_of(work, struct mlxsw_sp_acl_tcam_vregion,
777 rehash.dw.work);
778 int credits = MLXSW_SP_ACL_TCAM_VREGION_REHASH_CREDITS;
779
780 mlxsw_sp_acl_tcam_vregion_rehash(vregion->mlxsw_sp, vregion, &credits);
781 if (credits < 0)
782 /* Rehash gone out of credits so it was interrupted.
783 * Schedule the work as soon as possible to continue.
784 */
785 mlxsw_core_schedule_dw(&vregion->rehash.dw, 0);
786 else
787 mlxsw_sp_acl_tcam_vregion_rehash_work_schedule(vregion);
788 }
789
790 static void
mlxsw_sp_acl_tcam_rehash_ctx_vchunk_changed(struct mlxsw_sp_acl_tcam_vchunk * vchunk)791 mlxsw_sp_acl_tcam_rehash_ctx_vchunk_changed(struct mlxsw_sp_acl_tcam_vchunk *vchunk)
792 {
793 struct mlxsw_sp_acl_tcam_vregion *vregion = vchunk->vregion;
794
795 /* If a rule was added or deleted from vchunk which is currently
796 * under rehash migration, we have to reset the ventry pointers
797 * to make sure all rules are properly migrated.
798 */
799 if (vregion->rehash.ctx.current_vchunk == vchunk) {
800 vregion->rehash.ctx.start_ventry = NULL;
801 vregion->rehash.ctx.stop_ventry = NULL;
802 }
803 }
804
805 static void
mlxsw_sp_acl_tcam_rehash_ctx_vregion_changed(struct mlxsw_sp_acl_tcam_vregion * vregion)806 mlxsw_sp_acl_tcam_rehash_ctx_vregion_changed(struct mlxsw_sp_acl_tcam_vregion *vregion)
807 {
808 /* If a chunk was added or deleted from vregion we have to reset
809 * the current chunk pointer to make sure all chunks
810 * are properly migrated.
811 */
812 vregion->rehash.ctx.current_vchunk = NULL;
813 }
814
815 static struct mlxsw_sp_acl_tcam_vregion *
mlxsw_sp_acl_tcam_vregion_create(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vgroup * vgroup,unsigned int priority,struct mlxsw_afk_element_usage * elusage)816 mlxsw_sp_acl_tcam_vregion_create(struct mlxsw_sp *mlxsw_sp,
817 struct mlxsw_sp_acl_tcam_vgroup *vgroup,
818 unsigned int priority,
819 struct mlxsw_afk_element_usage *elusage)
820 {
821 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
822 struct mlxsw_afk *afk = mlxsw_sp_acl_afk(mlxsw_sp->acl);
823 struct mlxsw_sp_acl_tcam *tcam = vgroup->group.tcam;
824 struct mlxsw_sp_acl_tcam_vregion *vregion;
825 int err;
826
827 vregion = kzalloc(sizeof(*vregion), GFP_KERNEL);
828 if (!vregion)
829 return ERR_PTR(-ENOMEM);
830 INIT_LIST_HEAD(&vregion->vchunk_list);
831 mutex_init(&vregion->lock);
832 vregion->tcam = tcam;
833 vregion->mlxsw_sp = mlxsw_sp;
834 vregion->vgroup = vgroup;
835 vregion->ref_count = 1;
836
837 vregion->key_info = mlxsw_afk_key_info_get(afk, elusage);
838 if (IS_ERR(vregion->key_info)) {
839 err = PTR_ERR(vregion->key_info);
840 goto err_key_info_get;
841 }
842
843 vregion->region = mlxsw_sp_acl_tcam_region_create(mlxsw_sp, tcam,
844 vregion, NULL);
845 if (IS_ERR(vregion->region)) {
846 err = PTR_ERR(vregion->region);
847 goto err_region_create;
848 }
849
850 err = mlxsw_sp_acl_tcam_vgroup_vregion_attach(mlxsw_sp, vgroup, vregion,
851 priority);
852 if (err)
853 goto err_vgroup_vregion_attach;
854
855 if (vgroup->vregion_rehash_enabled && ops->region_rehash_hints_get) {
856 /* Create the delayed work for vregion periodic rehash */
857 INIT_DELAYED_WORK(&vregion->rehash.dw,
858 mlxsw_sp_acl_tcam_vregion_rehash_work);
859 mlxsw_sp_acl_tcam_vregion_rehash_work_schedule(vregion);
860 mutex_lock(&tcam->lock);
861 list_add_tail(&vregion->tlist, &tcam->vregion_list);
862 mutex_unlock(&tcam->lock);
863 }
864
865 return vregion;
866
867 err_vgroup_vregion_attach:
868 mlxsw_sp_acl_tcam_region_destroy(mlxsw_sp, vregion->region);
869 err_region_create:
870 mlxsw_afk_key_info_put(vregion->key_info);
871 err_key_info_get:
872 kfree(vregion);
873 return ERR_PTR(err);
874 }
875
876 static void
mlxsw_sp_acl_tcam_vregion_destroy(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vregion * vregion)877 mlxsw_sp_acl_tcam_vregion_destroy(struct mlxsw_sp *mlxsw_sp,
878 struct mlxsw_sp_acl_tcam_vregion *vregion)
879 {
880 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
881 struct mlxsw_sp_acl_tcam_vgroup *vgroup = vregion->vgroup;
882 struct mlxsw_sp_acl_tcam *tcam = vregion->tcam;
883
884 if (vgroup->vregion_rehash_enabled && ops->region_rehash_hints_get) {
885 mutex_lock(&tcam->lock);
886 list_del(&vregion->tlist);
887 mutex_unlock(&tcam->lock);
888 cancel_delayed_work_sync(&vregion->rehash.dw);
889 }
890 mlxsw_sp_acl_tcam_vgroup_vregion_detach(mlxsw_sp, vregion);
891 if (vregion->region2)
892 mlxsw_sp_acl_tcam_region_destroy(mlxsw_sp, vregion->region2);
893 mlxsw_sp_acl_tcam_region_destroy(mlxsw_sp, vregion->region);
894 mlxsw_afk_key_info_put(vregion->key_info);
895 mutex_destroy(&vregion->lock);
896 kfree(vregion);
897 }
898
mlxsw_sp_acl_tcam_vregion_rehash_intrvl_get(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam * tcam)899 u32 mlxsw_sp_acl_tcam_vregion_rehash_intrvl_get(struct mlxsw_sp *mlxsw_sp,
900 struct mlxsw_sp_acl_tcam *tcam)
901 {
902 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
903 u32 vregion_rehash_intrvl;
904
905 if (WARN_ON(!ops->region_rehash_hints_get))
906 return 0;
907 vregion_rehash_intrvl = tcam->vregion_rehash_intrvl;
908 return vregion_rehash_intrvl;
909 }
910
mlxsw_sp_acl_tcam_vregion_rehash_intrvl_set(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam * tcam,u32 val)911 int mlxsw_sp_acl_tcam_vregion_rehash_intrvl_set(struct mlxsw_sp *mlxsw_sp,
912 struct mlxsw_sp_acl_tcam *tcam,
913 u32 val)
914 {
915 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
916 struct mlxsw_sp_acl_tcam_vregion *vregion;
917
918 if (val < MLXSW_SP_ACL_TCAM_VREGION_REHASH_INTRVL_MIN && val)
919 return -EINVAL;
920 if (WARN_ON(!ops->region_rehash_hints_get))
921 return -EOPNOTSUPP;
922 tcam->vregion_rehash_intrvl = val;
923 mutex_lock(&tcam->lock);
924 list_for_each_entry(vregion, &tcam->vregion_list, tlist) {
925 if (val)
926 mlxsw_core_schedule_dw(&vregion->rehash.dw, 0);
927 else
928 cancel_delayed_work_sync(&vregion->rehash.dw);
929 }
930 mutex_unlock(&tcam->lock);
931 return 0;
932 }
933
934 static struct mlxsw_sp_acl_tcam_vregion *
mlxsw_sp_acl_tcam_vregion_get(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vgroup * vgroup,unsigned int priority,struct mlxsw_afk_element_usage * elusage)935 mlxsw_sp_acl_tcam_vregion_get(struct mlxsw_sp *mlxsw_sp,
936 struct mlxsw_sp_acl_tcam_vgroup *vgroup,
937 unsigned int priority,
938 struct mlxsw_afk_element_usage *elusage)
939 {
940 struct mlxsw_afk_element_usage vregion_elusage;
941 struct mlxsw_sp_acl_tcam_vregion *vregion;
942 bool need_split;
943
944 vregion = mlxsw_sp_acl_tcam_vgroup_vregion_find(vgroup, priority,
945 elusage, &need_split);
946 if (vregion) {
947 if (need_split) {
948 /* According to priority, new vchunk should belong to
949 * an existing vregion. However, this vchunk needs
950 * elements that vregion does not contain. We need
951 * to split the existing vregion into two and create
952 * a new vregion for the new vchunk in between.
953 * This is not supported now.
954 */
955 return ERR_PTR(-EOPNOTSUPP);
956 }
957 vregion->ref_count++;
958 return vregion;
959 }
960
961 mlxsw_sp_acl_tcam_vgroup_use_patterns(vgroup, elusage,
962 &vregion_elusage);
963
964 return mlxsw_sp_acl_tcam_vregion_create(mlxsw_sp, vgroup, priority,
965 &vregion_elusage);
966 }
967
968 static void
mlxsw_sp_acl_tcam_vregion_put(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vregion * vregion)969 mlxsw_sp_acl_tcam_vregion_put(struct mlxsw_sp *mlxsw_sp,
970 struct mlxsw_sp_acl_tcam_vregion *vregion)
971 {
972 if (--vregion->ref_count)
973 return;
974 mlxsw_sp_acl_tcam_vregion_destroy(mlxsw_sp, vregion);
975 }
976
977 static struct mlxsw_sp_acl_tcam_chunk *
mlxsw_sp_acl_tcam_chunk_create(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vchunk * vchunk,struct mlxsw_sp_acl_tcam_region * region)978 mlxsw_sp_acl_tcam_chunk_create(struct mlxsw_sp *mlxsw_sp,
979 struct mlxsw_sp_acl_tcam_vchunk *vchunk,
980 struct mlxsw_sp_acl_tcam_region *region)
981 {
982 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
983 struct mlxsw_sp_acl_tcam_chunk *chunk;
984
985 chunk = kzalloc(sizeof(*chunk) + ops->chunk_priv_size, GFP_KERNEL);
986 if (!chunk)
987 return ERR_PTR(-ENOMEM);
988 chunk->vchunk = vchunk;
989 chunk->region = region;
990
991 ops->chunk_init(region->priv, chunk->priv, vchunk->priority);
992 return chunk;
993 }
994
995 static void
mlxsw_sp_acl_tcam_chunk_destroy(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_chunk * chunk)996 mlxsw_sp_acl_tcam_chunk_destroy(struct mlxsw_sp *mlxsw_sp,
997 struct mlxsw_sp_acl_tcam_chunk *chunk)
998 {
999 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
1000
1001 ops->chunk_fini(chunk->priv);
1002 kfree(chunk);
1003 }
1004
1005 static struct mlxsw_sp_acl_tcam_vchunk *
mlxsw_sp_acl_tcam_vchunk_create(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vgroup * vgroup,unsigned int priority,struct mlxsw_afk_element_usage * elusage)1006 mlxsw_sp_acl_tcam_vchunk_create(struct mlxsw_sp *mlxsw_sp,
1007 struct mlxsw_sp_acl_tcam_vgroup *vgroup,
1008 unsigned int priority,
1009 struct mlxsw_afk_element_usage *elusage)
1010 {
1011 struct mlxsw_sp_acl_tcam_vchunk *vchunk, *vchunk2;
1012 struct mlxsw_sp_acl_tcam_vregion *vregion;
1013 struct list_head *pos;
1014 int err;
1015
1016 if (priority == MLXSW_SP_ACL_TCAM_CATCHALL_PRIO)
1017 return ERR_PTR(-EINVAL);
1018
1019 vchunk = kzalloc(sizeof(*vchunk), GFP_KERNEL);
1020 if (!vchunk)
1021 return ERR_PTR(-ENOMEM);
1022 INIT_LIST_HEAD(&vchunk->ventry_list);
1023 vchunk->priority = priority;
1024 vchunk->vgroup = vgroup;
1025 vchunk->ref_count = 1;
1026
1027 vregion = mlxsw_sp_acl_tcam_vregion_get(mlxsw_sp, vgroup,
1028 priority, elusage);
1029 if (IS_ERR(vregion)) {
1030 err = PTR_ERR(vregion);
1031 goto err_vregion_get;
1032 }
1033
1034 vchunk->vregion = vregion;
1035
1036 err = rhashtable_insert_fast(&vgroup->vchunk_ht, &vchunk->ht_node,
1037 mlxsw_sp_acl_tcam_vchunk_ht_params);
1038 if (err)
1039 goto err_rhashtable_insert;
1040
1041 mutex_lock(&vregion->lock);
1042 vchunk->chunk = mlxsw_sp_acl_tcam_chunk_create(mlxsw_sp, vchunk,
1043 vchunk->vregion->region);
1044 if (IS_ERR(vchunk->chunk)) {
1045 mutex_unlock(&vregion->lock);
1046 err = PTR_ERR(vchunk->chunk);
1047 goto err_chunk_create;
1048 }
1049
1050 mlxsw_sp_acl_tcam_rehash_ctx_vregion_changed(vregion);
1051
1052 /* Position the vchunk inside the list according to priority */
1053 list_for_each(pos, &vregion->vchunk_list) {
1054 vchunk2 = list_entry(pos, typeof(*vchunk2), list);
1055 if (vchunk2->priority > priority)
1056 break;
1057 }
1058 list_add_tail(&vchunk->list, pos);
1059 mutex_unlock(&vregion->lock);
1060 mlxsw_sp_acl_tcam_vgroup_prio_update(vgroup);
1061
1062 return vchunk;
1063
1064 err_chunk_create:
1065 rhashtable_remove_fast(&vgroup->vchunk_ht, &vchunk->ht_node,
1066 mlxsw_sp_acl_tcam_vchunk_ht_params);
1067 err_rhashtable_insert:
1068 mlxsw_sp_acl_tcam_vregion_put(mlxsw_sp, vregion);
1069 err_vregion_get:
1070 kfree(vchunk);
1071 return ERR_PTR(err);
1072 }
1073
1074 static void
mlxsw_sp_acl_tcam_vchunk_destroy(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vchunk * vchunk)1075 mlxsw_sp_acl_tcam_vchunk_destroy(struct mlxsw_sp *mlxsw_sp,
1076 struct mlxsw_sp_acl_tcam_vchunk *vchunk)
1077 {
1078 struct mlxsw_sp_acl_tcam_vregion *vregion = vchunk->vregion;
1079 struct mlxsw_sp_acl_tcam_vgroup *vgroup = vchunk->vgroup;
1080
1081 mutex_lock(&vregion->lock);
1082 mlxsw_sp_acl_tcam_rehash_ctx_vregion_changed(vregion);
1083 list_del(&vchunk->list);
1084 if (vchunk->chunk2)
1085 mlxsw_sp_acl_tcam_chunk_destroy(mlxsw_sp, vchunk->chunk2);
1086 mlxsw_sp_acl_tcam_chunk_destroy(mlxsw_sp, vchunk->chunk);
1087 mutex_unlock(&vregion->lock);
1088 rhashtable_remove_fast(&vgroup->vchunk_ht, &vchunk->ht_node,
1089 mlxsw_sp_acl_tcam_vchunk_ht_params);
1090 mlxsw_sp_acl_tcam_vregion_put(mlxsw_sp, vchunk->vregion);
1091 kfree(vchunk);
1092 mlxsw_sp_acl_tcam_vgroup_prio_update(vgroup);
1093 }
1094
1095 static struct mlxsw_sp_acl_tcam_vchunk *
mlxsw_sp_acl_tcam_vchunk_get(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vgroup * vgroup,unsigned int priority,struct mlxsw_afk_element_usage * elusage)1096 mlxsw_sp_acl_tcam_vchunk_get(struct mlxsw_sp *mlxsw_sp,
1097 struct mlxsw_sp_acl_tcam_vgroup *vgroup,
1098 unsigned int priority,
1099 struct mlxsw_afk_element_usage *elusage)
1100 {
1101 struct mlxsw_sp_acl_tcam_vchunk *vchunk;
1102
1103 vchunk = rhashtable_lookup_fast(&vgroup->vchunk_ht, &priority,
1104 mlxsw_sp_acl_tcam_vchunk_ht_params);
1105 if (vchunk) {
1106 if (WARN_ON(!mlxsw_afk_key_info_subset(vchunk->vregion->key_info,
1107 elusage)))
1108 return ERR_PTR(-EINVAL);
1109 vchunk->ref_count++;
1110 return vchunk;
1111 }
1112 return mlxsw_sp_acl_tcam_vchunk_create(mlxsw_sp, vgroup,
1113 priority, elusage);
1114 }
1115
1116 static void
mlxsw_sp_acl_tcam_vchunk_put(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vchunk * vchunk)1117 mlxsw_sp_acl_tcam_vchunk_put(struct mlxsw_sp *mlxsw_sp,
1118 struct mlxsw_sp_acl_tcam_vchunk *vchunk)
1119 {
1120 if (--vchunk->ref_count)
1121 return;
1122 mlxsw_sp_acl_tcam_vchunk_destroy(mlxsw_sp, vchunk);
1123 }
1124
1125 static struct mlxsw_sp_acl_tcam_entry *
mlxsw_sp_acl_tcam_entry_create(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_ventry * ventry,struct mlxsw_sp_acl_tcam_chunk * chunk)1126 mlxsw_sp_acl_tcam_entry_create(struct mlxsw_sp *mlxsw_sp,
1127 struct mlxsw_sp_acl_tcam_ventry *ventry,
1128 struct mlxsw_sp_acl_tcam_chunk *chunk)
1129 {
1130 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
1131 struct mlxsw_sp_acl_tcam_entry *entry;
1132 int err;
1133
1134 entry = kzalloc(sizeof(*entry) + ops->entry_priv_size, GFP_KERNEL);
1135 if (!entry)
1136 return ERR_PTR(-ENOMEM);
1137 entry->ventry = ventry;
1138 entry->chunk = chunk;
1139
1140 err = ops->entry_add(mlxsw_sp, chunk->region->priv, chunk->priv,
1141 entry->priv, ventry->rulei);
1142 if (err)
1143 goto err_entry_add;
1144
1145 return entry;
1146
1147 err_entry_add:
1148 kfree(entry);
1149 return ERR_PTR(err);
1150 }
1151
mlxsw_sp_acl_tcam_entry_destroy(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_entry * entry)1152 static void mlxsw_sp_acl_tcam_entry_destroy(struct mlxsw_sp *mlxsw_sp,
1153 struct mlxsw_sp_acl_tcam_entry *entry)
1154 {
1155 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
1156
1157 ops->entry_del(mlxsw_sp, entry->chunk->region->priv,
1158 entry->chunk->priv, entry->priv);
1159 kfree(entry);
1160 }
1161
1162 static int
mlxsw_sp_acl_tcam_entry_action_replace(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_region * region,struct mlxsw_sp_acl_tcam_entry * entry,struct mlxsw_sp_acl_rule_info * rulei)1163 mlxsw_sp_acl_tcam_entry_action_replace(struct mlxsw_sp *mlxsw_sp,
1164 struct mlxsw_sp_acl_tcam_region *region,
1165 struct mlxsw_sp_acl_tcam_entry *entry,
1166 struct mlxsw_sp_acl_rule_info *rulei)
1167 {
1168 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
1169
1170 return ops->entry_action_replace(mlxsw_sp, region->priv,
1171 entry->priv, rulei);
1172 }
1173
1174 static int
mlxsw_sp_acl_tcam_entry_activity_get(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_entry * entry,bool * activity)1175 mlxsw_sp_acl_tcam_entry_activity_get(struct mlxsw_sp *mlxsw_sp,
1176 struct mlxsw_sp_acl_tcam_entry *entry,
1177 bool *activity)
1178 {
1179 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
1180
1181 return ops->entry_activity_get(mlxsw_sp, entry->chunk->region->priv,
1182 entry->priv, activity);
1183 }
1184
mlxsw_sp_acl_tcam_ventry_add(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vgroup * vgroup,struct mlxsw_sp_acl_tcam_ventry * ventry,struct mlxsw_sp_acl_rule_info * rulei)1185 static int mlxsw_sp_acl_tcam_ventry_add(struct mlxsw_sp *mlxsw_sp,
1186 struct mlxsw_sp_acl_tcam_vgroup *vgroup,
1187 struct mlxsw_sp_acl_tcam_ventry *ventry,
1188 struct mlxsw_sp_acl_rule_info *rulei)
1189 {
1190 struct mlxsw_sp_acl_tcam_vregion *vregion;
1191 struct mlxsw_sp_acl_tcam_vchunk *vchunk;
1192 int err;
1193
1194 vchunk = mlxsw_sp_acl_tcam_vchunk_get(mlxsw_sp, vgroup, rulei->priority,
1195 &rulei->values.elusage);
1196 if (IS_ERR(vchunk))
1197 return PTR_ERR(vchunk);
1198
1199 ventry->vchunk = vchunk;
1200 ventry->rulei = rulei;
1201 vregion = vchunk->vregion;
1202
1203 mutex_lock(&vregion->lock);
1204 ventry->entry = mlxsw_sp_acl_tcam_entry_create(mlxsw_sp, ventry,
1205 vchunk->chunk);
1206 if (IS_ERR(ventry->entry)) {
1207 mutex_unlock(&vregion->lock);
1208 err = PTR_ERR(ventry->entry);
1209 goto err_entry_create;
1210 }
1211
1212 list_add_tail(&ventry->list, &vchunk->ventry_list);
1213 mlxsw_sp_acl_tcam_rehash_ctx_vchunk_changed(vchunk);
1214 mutex_unlock(&vregion->lock);
1215
1216 return 0;
1217
1218 err_entry_create:
1219 mlxsw_sp_acl_tcam_vchunk_put(mlxsw_sp, vchunk);
1220 return err;
1221 }
1222
mlxsw_sp_acl_tcam_ventry_del(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_ventry * ventry)1223 static void mlxsw_sp_acl_tcam_ventry_del(struct mlxsw_sp *mlxsw_sp,
1224 struct mlxsw_sp_acl_tcam_ventry *ventry)
1225 {
1226 struct mlxsw_sp_acl_tcam_vchunk *vchunk = ventry->vchunk;
1227 struct mlxsw_sp_acl_tcam_vregion *vregion = vchunk->vregion;
1228
1229 mutex_lock(&vregion->lock);
1230 mlxsw_sp_acl_tcam_rehash_ctx_vchunk_changed(vchunk);
1231 list_del(&ventry->list);
1232 mlxsw_sp_acl_tcam_entry_destroy(mlxsw_sp, ventry->entry);
1233 mutex_unlock(&vregion->lock);
1234 mlxsw_sp_acl_tcam_vchunk_put(mlxsw_sp, vchunk);
1235 }
1236
1237 static int
mlxsw_sp_acl_tcam_ventry_action_replace(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_ventry * ventry,struct mlxsw_sp_acl_rule_info * rulei)1238 mlxsw_sp_acl_tcam_ventry_action_replace(struct mlxsw_sp *mlxsw_sp,
1239 struct mlxsw_sp_acl_tcam_ventry *ventry,
1240 struct mlxsw_sp_acl_rule_info *rulei)
1241 {
1242 struct mlxsw_sp_acl_tcam_vchunk *vchunk = ventry->vchunk;
1243
1244 return mlxsw_sp_acl_tcam_entry_action_replace(mlxsw_sp,
1245 vchunk->vregion->region,
1246 ventry->entry, rulei);
1247 }
1248
1249 static int
mlxsw_sp_acl_tcam_ventry_activity_get(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_ventry * ventry,bool * activity)1250 mlxsw_sp_acl_tcam_ventry_activity_get(struct mlxsw_sp *mlxsw_sp,
1251 struct mlxsw_sp_acl_tcam_ventry *ventry,
1252 bool *activity)
1253 {
1254 return mlxsw_sp_acl_tcam_entry_activity_get(mlxsw_sp,
1255 ventry->entry, activity);
1256 }
1257
1258 static int
mlxsw_sp_acl_tcam_ventry_migrate(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_ventry * ventry,struct mlxsw_sp_acl_tcam_chunk * chunk,int * credits)1259 mlxsw_sp_acl_tcam_ventry_migrate(struct mlxsw_sp *mlxsw_sp,
1260 struct mlxsw_sp_acl_tcam_ventry *ventry,
1261 struct mlxsw_sp_acl_tcam_chunk *chunk,
1262 int *credits)
1263 {
1264 struct mlxsw_sp_acl_tcam_entry *new_entry;
1265
1266 /* First check if the entry is not already where we want it to be. */
1267 if (ventry->entry->chunk == chunk)
1268 return 0;
1269
1270 if (--(*credits) < 0)
1271 return 0;
1272
1273 new_entry = mlxsw_sp_acl_tcam_entry_create(mlxsw_sp, ventry, chunk);
1274 if (IS_ERR(new_entry))
1275 return PTR_ERR(new_entry);
1276 mlxsw_sp_acl_tcam_entry_destroy(mlxsw_sp, ventry->entry);
1277 ventry->entry = new_entry;
1278 return 0;
1279 }
1280
1281 static int
mlxsw_sp_acl_tcam_vchunk_migrate_start(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vchunk * vchunk,struct mlxsw_sp_acl_tcam_region * region,struct mlxsw_sp_acl_tcam_rehash_ctx * ctx)1282 mlxsw_sp_acl_tcam_vchunk_migrate_start(struct mlxsw_sp *mlxsw_sp,
1283 struct mlxsw_sp_acl_tcam_vchunk *vchunk,
1284 struct mlxsw_sp_acl_tcam_region *region,
1285 struct mlxsw_sp_acl_tcam_rehash_ctx *ctx)
1286 {
1287 struct mlxsw_sp_acl_tcam_chunk *new_chunk;
1288
1289 new_chunk = mlxsw_sp_acl_tcam_chunk_create(mlxsw_sp, vchunk, region);
1290 if (IS_ERR(new_chunk))
1291 return PTR_ERR(new_chunk);
1292 vchunk->chunk2 = vchunk->chunk;
1293 vchunk->chunk = new_chunk;
1294 ctx->current_vchunk = vchunk;
1295 ctx->start_ventry = NULL;
1296 ctx->stop_ventry = NULL;
1297 return 0;
1298 }
1299
1300 static void
mlxsw_sp_acl_tcam_vchunk_migrate_end(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vchunk * vchunk,struct mlxsw_sp_acl_tcam_rehash_ctx * ctx)1301 mlxsw_sp_acl_tcam_vchunk_migrate_end(struct mlxsw_sp *mlxsw_sp,
1302 struct mlxsw_sp_acl_tcam_vchunk *vchunk,
1303 struct mlxsw_sp_acl_tcam_rehash_ctx *ctx)
1304 {
1305 mlxsw_sp_acl_tcam_chunk_destroy(mlxsw_sp, vchunk->chunk2);
1306 vchunk->chunk2 = NULL;
1307 ctx->current_vchunk = NULL;
1308 }
1309
1310 static int
mlxsw_sp_acl_tcam_vchunk_migrate_one(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vchunk * vchunk,struct mlxsw_sp_acl_tcam_region * region,struct mlxsw_sp_acl_tcam_rehash_ctx * ctx,int * credits)1311 mlxsw_sp_acl_tcam_vchunk_migrate_one(struct mlxsw_sp *mlxsw_sp,
1312 struct mlxsw_sp_acl_tcam_vchunk *vchunk,
1313 struct mlxsw_sp_acl_tcam_region *region,
1314 struct mlxsw_sp_acl_tcam_rehash_ctx *ctx,
1315 int *credits)
1316 {
1317 struct mlxsw_sp_acl_tcam_ventry *ventry;
1318 int err;
1319
1320 if (vchunk->chunk->region != region) {
1321 err = mlxsw_sp_acl_tcam_vchunk_migrate_start(mlxsw_sp, vchunk,
1322 region, ctx);
1323 if (err)
1324 return err;
1325 } else if (!vchunk->chunk2) {
1326 /* The chunk is already as it should be, nothing to do. */
1327 return 0;
1328 }
1329
1330 /* If the migration got interrupted, we have the ventry to start from
1331 * stored in context.
1332 */
1333 if (ctx->start_ventry)
1334 ventry = ctx->start_ventry;
1335 else
1336 ventry = list_first_entry(&vchunk->ventry_list,
1337 typeof(*ventry), list);
1338
1339 list_for_each_entry_from(ventry, &vchunk->ventry_list, list) {
1340 /* During rollback, once we reach the ventry that failed
1341 * to migrate, we are done.
1342 */
1343 if (ventry == ctx->stop_ventry)
1344 break;
1345
1346 err = mlxsw_sp_acl_tcam_ventry_migrate(mlxsw_sp, ventry,
1347 vchunk->chunk, credits);
1348 if (err) {
1349 if (ctx->this_is_rollback) {
1350 /* Save the ventry which we ended with and try
1351 * to continue later on.
1352 */
1353 ctx->start_ventry = ventry;
1354 return err;
1355 }
1356 /* Swap the chunk and chunk2 pointers so the follow-up
1357 * rollback call will see the original chunk pointer
1358 * in vchunk->chunk.
1359 */
1360 swap(vchunk->chunk, vchunk->chunk2);
1361 /* The rollback has to be done from beginning of the
1362 * chunk, that is why we have to null the start_ventry.
1363 * However, we know where to stop the rollback,
1364 * at the current ventry.
1365 */
1366 ctx->start_ventry = NULL;
1367 ctx->stop_ventry = ventry;
1368 return err;
1369 } else if (*credits < 0) {
1370 /* We are out of credits, the rest of the ventries
1371 * will be migrated later. Save the ventry
1372 * which we ended with.
1373 */
1374 ctx->start_ventry = ventry;
1375 return 0;
1376 }
1377 }
1378
1379 mlxsw_sp_acl_tcam_vchunk_migrate_end(mlxsw_sp, vchunk, ctx);
1380 return 0;
1381 }
1382
1383 static int
mlxsw_sp_acl_tcam_vchunk_migrate_all(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vregion * vregion,struct mlxsw_sp_acl_tcam_rehash_ctx * ctx,int * credits)1384 mlxsw_sp_acl_tcam_vchunk_migrate_all(struct mlxsw_sp *mlxsw_sp,
1385 struct mlxsw_sp_acl_tcam_vregion *vregion,
1386 struct mlxsw_sp_acl_tcam_rehash_ctx *ctx,
1387 int *credits)
1388 {
1389 struct mlxsw_sp_acl_tcam_vchunk *vchunk;
1390 int err;
1391
1392 /* If the migration got interrupted, we have the vchunk
1393 * we are working on stored in context.
1394 */
1395 if (ctx->current_vchunk)
1396 vchunk = ctx->current_vchunk;
1397 else
1398 vchunk = list_first_entry(&vregion->vchunk_list,
1399 typeof(*vchunk), list);
1400
1401 list_for_each_entry_from(vchunk, &vregion->vchunk_list, list) {
1402 err = mlxsw_sp_acl_tcam_vchunk_migrate_one(mlxsw_sp, vchunk,
1403 vregion->region,
1404 ctx, credits);
1405 if (err || *credits < 0)
1406 return err;
1407 }
1408 return 0;
1409 }
1410
1411 static int
mlxsw_sp_acl_tcam_vregion_migrate(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vregion * vregion,struct mlxsw_sp_acl_tcam_rehash_ctx * ctx,int * credits)1412 mlxsw_sp_acl_tcam_vregion_migrate(struct mlxsw_sp *mlxsw_sp,
1413 struct mlxsw_sp_acl_tcam_vregion *vregion,
1414 struct mlxsw_sp_acl_tcam_rehash_ctx *ctx,
1415 int *credits)
1416 {
1417 int err, err2;
1418
1419 trace_mlxsw_sp_acl_tcam_vregion_migrate(mlxsw_sp, vregion);
1420 mutex_lock(&vregion->lock);
1421 err = mlxsw_sp_acl_tcam_vchunk_migrate_all(mlxsw_sp, vregion,
1422 ctx, credits);
1423 if (err) {
1424 /* In case migration was not successful, we need to swap
1425 * so the original region pointer is assigned again
1426 * to vregion->region.
1427 */
1428 swap(vregion->region, vregion->region2);
1429 ctx->current_vchunk = NULL;
1430 ctx->this_is_rollback = true;
1431 err2 = mlxsw_sp_acl_tcam_vchunk_migrate_all(mlxsw_sp, vregion,
1432 ctx, credits);
1433 if (err2) {
1434 trace_mlxsw_sp_acl_tcam_vregion_rehash_rollback_failed(mlxsw_sp,
1435 vregion);
1436 dev_err(mlxsw_sp->bus_info->dev, "Failed to rollback during vregion migration fail\n");
1437 /* Let the rollback to be continued later on. */
1438 }
1439 }
1440 mutex_unlock(&vregion->lock);
1441 trace_mlxsw_sp_acl_tcam_vregion_migrate_end(mlxsw_sp, vregion);
1442 return err;
1443 }
1444
1445 static bool
mlxsw_sp_acl_tcam_vregion_rehash_in_progress(const struct mlxsw_sp_acl_tcam_rehash_ctx * ctx)1446 mlxsw_sp_acl_tcam_vregion_rehash_in_progress(const struct mlxsw_sp_acl_tcam_rehash_ctx *ctx)
1447 {
1448 return ctx->hints_priv;
1449 }
1450
1451 static int
mlxsw_sp_acl_tcam_vregion_rehash_start(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vregion * vregion,struct mlxsw_sp_acl_tcam_rehash_ctx * ctx)1452 mlxsw_sp_acl_tcam_vregion_rehash_start(struct mlxsw_sp *mlxsw_sp,
1453 struct mlxsw_sp_acl_tcam_vregion *vregion,
1454 struct mlxsw_sp_acl_tcam_rehash_ctx *ctx)
1455 {
1456 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
1457 unsigned int priority = mlxsw_sp_acl_tcam_vregion_prio(vregion);
1458 struct mlxsw_sp_acl_tcam_region *new_region;
1459 void *hints_priv;
1460 int err;
1461
1462 trace_mlxsw_sp_acl_tcam_vregion_rehash(mlxsw_sp, vregion);
1463
1464 hints_priv = ops->region_rehash_hints_get(vregion->region->priv);
1465 if (IS_ERR(hints_priv))
1466 return PTR_ERR(hints_priv);
1467
1468 new_region = mlxsw_sp_acl_tcam_region_create(mlxsw_sp, vregion->tcam,
1469 vregion, hints_priv);
1470 if (IS_ERR(new_region)) {
1471 err = PTR_ERR(new_region);
1472 goto err_region_create;
1473 }
1474
1475 /* vregion->region contains the pointer to the new region
1476 * we are going to migrate to.
1477 */
1478 vregion->region2 = vregion->region;
1479 vregion->region = new_region;
1480 err = mlxsw_sp_acl_tcam_group_region_attach(mlxsw_sp,
1481 vregion->region2->group,
1482 new_region, priority,
1483 vregion->region2);
1484 if (err)
1485 goto err_group_region_attach;
1486
1487 ctx->hints_priv = hints_priv;
1488 ctx->this_is_rollback = false;
1489
1490 return 0;
1491
1492 err_group_region_attach:
1493 vregion->region = vregion->region2;
1494 vregion->region2 = NULL;
1495 mlxsw_sp_acl_tcam_region_destroy(mlxsw_sp, new_region);
1496 err_region_create:
1497 ops->region_rehash_hints_put(hints_priv);
1498 return err;
1499 }
1500
1501 static void
mlxsw_sp_acl_tcam_vregion_rehash_end(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vregion * vregion,struct mlxsw_sp_acl_tcam_rehash_ctx * ctx)1502 mlxsw_sp_acl_tcam_vregion_rehash_end(struct mlxsw_sp *mlxsw_sp,
1503 struct mlxsw_sp_acl_tcam_vregion *vregion,
1504 struct mlxsw_sp_acl_tcam_rehash_ctx *ctx)
1505 {
1506 struct mlxsw_sp_acl_tcam_region *unused_region = vregion->region2;
1507 const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
1508
1509 vregion->region2 = NULL;
1510 mlxsw_sp_acl_tcam_group_region_detach(mlxsw_sp, unused_region);
1511 mlxsw_sp_acl_tcam_region_destroy(mlxsw_sp, unused_region);
1512 ops->region_rehash_hints_put(ctx->hints_priv);
1513 ctx->hints_priv = NULL;
1514 }
1515
1516 static void
mlxsw_sp_acl_tcam_vregion_rehash(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam_vregion * vregion,int * credits)1517 mlxsw_sp_acl_tcam_vregion_rehash(struct mlxsw_sp *mlxsw_sp,
1518 struct mlxsw_sp_acl_tcam_vregion *vregion,
1519 int *credits)
1520 {
1521 struct mlxsw_sp_acl_tcam_rehash_ctx *ctx = &vregion->rehash.ctx;
1522 int err;
1523
1524 /* Check if the previous rehash work was interrupted
1525 * which means we have to continue it now.
1526 * If not, start a new rehash.
1527 */
1528 if (!mlxsw_sp_acl_tcam_vregion_rehash_in_progress(ctx)) {
1529 err = mlxsw_sp_acl_tcam_vregion_rehash_start(mlxsw_sp,
1530 vregion, ctx);
1531 if (err) {
1532 if (err != -EAGAIN)
1533 dev_err(mlxsw_sp->bus_info->dev, "Failed get rehash hints\n");
1534 return;
1535 }
1536 }
1537
1538 err = mlxsw_sp_acl_tcam_vregion_migrate(mlxsw_sp, vregion,
1539 ctx, credits);
1540 if (err) {
1541 dev_err(mlxsw_sp->bus_info->dev, "Failed to migrate vregion\n");
1542 }
1543
1544 if (*credits >= 0)
1545 mlxsw_sp_acl_tcam_vregion_rehash_end(mlxsw_sp, vregion, ctx);
1546 }
1547
1548 static const enum mlxsw_afk_element mlxsw_sp_acl_tcam_pattern_ipv4[] = {
1549 MLXSW_AFK_ELEMENT_SRC_SYS_PORT,
1550 MLXSW_AFK_ELEMENT_DMAC_32_47,
1551 MLXSW_AFK_ELEMENT_DMAC_0_31,
1552 MLXSW_AFK_ELEMENT_SMAC_32_47,
1553 MLXSW_AFK_ELEMENT_SMAC_0_31,
1554 MLXSW_AFK_ELEMENT_ETHERTYPE,
1555 MLXSW_AFK_ELEMENT_IP_PROTO,
1556 MLXSW_AFK_ELEMENT_SRC_IP_0_31,
1557 MLXSW_AFK_ELEMENT_DST_IP_0_31,
1558 MLXSW_AFK_ELEMENT_DST_L4_PORT,
1559 MLXSW_AFK_ELEMENT_SRC_L4_PORT,
1560 MLXSW_AFK_ELEMENT_VID,
1561 MLXSW_AFK_ELEMENT_PCP,
1562 MLXSW_AFK_ELEMENT_TCP_FLAGS,
1563 MLXSW_AFK_ELEMENT_IP_TTL_,
1564 MLXSW_AFK_ELEMENT_IP_ECN,
1565 MLXSW_AFK_ELEMENT_IP_DSCP,
1566 };
1567
1568 static const enum mlxsw_afk_element mlxsw_sp_acl_tcam_pattern_ipv6[] = {
1569 MLXSW_AFK_ELEMENT_ETHERTYPE,
1570 MLXSW_AFK_ELEMENT_IP_PROTO,
1571 MLXSW_AFK_ELEMENT_SRC_IP_96_127,
1572 MLXSW_AFK_ELEMENT_SRC_IP_64_95,
1573 MLXSW_AFK_ELEMENT_SRC_IP_32_63,
1574 MLXSW_AFK_ELEMENT_SRC_IP_0_31,
1575 MLXSW_AFK_ELEMENT_DST_IP_96_127,
1576 MLXSW_AFK_ELEMENT_DST_IP_64_95,
1577 MLXSW_AFK_ELEMENT_DST_IP_32_63,
1578 MLXSW_AFK_ELEMENT_DST_IP_0_31,
1579 MLXSW_AFK_ELEMENT_DST_L4_PORT,
1580 MLXSW_AFK_ELEMENT_SRC_L4_PORT,
1581 };
1582
1583 static const struct mlxsw_sp_acl_tcam_pattern mlxsw_sp_acl_tcam_patterns[] = {
1584 {
1585 .elements = mlxsw_sp_acl_tcam_pattern_ipv4,
1586 .elements_count = ARRAY_SIZE(mlxsw_sp_acl_tcam_pattern_ipv4),
1587 },
1588 {
1589 .elements = mlxsw_sp_acl_tcam_pattern_ipv6,
1590 .elements_count = ARRAY_SIZE(mlxsw_sp_acl_tcam_pattern_ipv6),
1591 },
1592 };
1593
1594 #define MLXSW_SP_ACL_TCAM_PATTERNS_COUNT \
1595 ARRAY_SIZE(mlxsw_sp_acl_tcam_patterns)
1596
1597 struct mlxsw_sp_acl_tcam_flower_ruleset {
1598 struct mlxsw_sp_acl_tcam_vgroup vgroup;
1599 };
1600
1601 struct mlxsw_sp_acl_tcam_flower_rule {
1602 struct mlxsw_sp_acl_tcam_ventry ventry;
1603 };
1604
1605 static int
mlxsw_sp_acl_tcam_flower_ruleset_add(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam * tcam,void * ruleset_priv,struct mlxsw_afk_element_usage * tmplt_elusage,unsigned int * p_min_prio,unsigned int * p_max_prio)1606 mlxsw_sp_acl_tcam_flower_ruleset_add(struct mlxsw_sp *mlxsw_sp,
1607 struct mlxsw_sp_acl_tcam *tcam,
1608 void *ruleset_priv,
1609 struct mlxsw_afk_element_usage *tmplt_elusage,
1610 unsigned int *p_min_prio,
1611 unsigned int *p_max_prio)
1612 {
1613 struct mlxsw_sp_acl_tcam_flower_ruleset *ruleset = ruleset_priv;
1614
1615 return mlxsw_sp_acl_tcam_vgroup_add(mlxsw_sp, tcam, &ruleset->vgroup,
1616 mlxsw_sp_acl_tcam_patterns,
1617 MLXSW_SP_ACL_TCAM_PATTERNS_COUNT,
1618 tmplt_elusage, true,
1619 p_min_prio, p_max_prio);
1620 }
1621
1622 static void
mlxsw_sp_acl_tcam_flower_ruleset_del(struct mlxsw_sp * mlxsw_sp,void * ruleset_priv)1623 mlxsw_sp_acl_tcam_flower_ruleset_del(struct mlxsw_sp *mlxsw_sp,
1624 void *ruleset_priv)
1625 {
1626 struct mlxsw_sp_acl_tcam_flower_ruleset *ruleset = ruleset_priv;
1627
1628 mlxsw_sp_acl_tcam_vgroup_del(&ruleset->vgroup);
1629 }
1630
1631 static int
mlxsw_sp_acl_tcam_flower_ruleset_bind(struct mlxsw_sp * mlxsw_sp,void * ruleset_priv,struct mlxsw_sp_port * mlxsw_sp_port,bool ingress)1632 mlxsw_sp_acl_tcam_flower_ruleset_bind(struct mlxsw_sp *mlxsw_sp,
1633 void *ruleset_priv,
1634 struct mlxsw_sp_port *mlxsw_sp_port,
1635 bool ingress)
1636 {
1637 struct mlxsw_sp_acl_tcam_flower_ruleset *ruleset = ruleset_priv;
1638
1639 return mlxsw_sp_acl_tcam_group_bind(mlxsw_sp, &ruleset->vgroup.group,
1640 mlxsw_sp_port, ingress);
1641 }
1642
1643 static void
mlxsw_sp_acl_tcam_flower_ruleset_unbind(struct mlxsw_sp * mlxsw_sp,void * ruleset_priv,struct mlxsw_sp_port * mlxsw_sp_port,bool ingress)1644 mlxsw_sp_acl_tcam_flower_ruleset_unbind(struct mlxsw_sp *mlxsw_sp,
1645 void *ruleset_priv,
1646 struct mlxsw_sp_port *mlxsw_sp_port,
1647 bool ingress)
1648 {
1649 struct mlxsw_sp_acl_tcam_flower_ruleset *ruleset = ruleset_priv;
1650
1651 mlxsw_sp_acl_tcam_group_unbind(mlxsw_sp, &ruleset->vgroup.group,
1652 mlxsw_sp_port, ingress);
1653 }
1654
1655 static u16
mlxsw_sp_acl_tcam_flower_ruleset_group_id(void * ruleset_priv)1656 mlxsw_sp_acl_tcam_flower_ruleset_group_id(void *ruleset_priv)
1657 {
1658 struct mlxsw_sp_acl_tcam_flower_ruleset *ruleset = ruleset_priv;
1659
1660 return mlxsw_sp_acl_tcam_group_id(&ruleset->vgroup.group);
1661 }
1662
1663 static int
mlxsw_sp_acl_tcam_flower_rule_add(struct mlxsw_sp * mlxsw_sp,void * ruleset_priv,void * rule_priv,struct mlxsw_sp_acl_rule_info * rulei)1664 mlxsw_sp_acl_tcam_flower_rule_add(struct mlxsw_sp *mlxsw_sp,
1665 void *ruleset_priv, void *rule_priv,
1666 struct mlxsw_sp_acl_rule_info *rulei)
1667 {
1668 struct mlxsw_sp_acl_tcam_flower_ruleset *ruleset = ruleset_priv;
1669 struct mlxsw_sp_acl_tcam_flower_rule *rule = rule_priv;
1670
1671 return mlxsw_sp_acl_tcam_ventry_add(mlxsw_sp, &ruleset->vgroup,
1672 &rule->ventry, rulei);
1673 }
1674
1675 static void
mlxsw_sp_acl_tcam_flower_rule_del(struct mlxsw_sp * mlxsw_sp,void * rule_priv)1676 mlxsw_sp_acl_tcam_flower_rule_del(struct mlxsw_sp *mlxsw_sp, void *rule_priv)
1677 {
1678 struct mlxsw_sp_acl_tcam_flower_rule *rule = rule_priv;
1679
1680 mlxsw_sp_acl_tcam_ventry_del(mlxsw_sp, &rule->ventry);
1681 }
1682
1683 static int
mlxsw_sp_acl_tcam_flower_rule_action_replace(struct mlxsw_sp * mlxsw_sp,void * rule_priv,struct mlxsw_sp_acl_rule_info * rulei)1684 mlxsw_sp_acl_tcam_flower_rule_action_replace(struct mlxsw_sp *mlxsw_sp,
1685 void *rule_priv,
1686 struct mlxsw_sp_acl_rule_info *rulei)
1687 {
1688 return -EOPNOTSUPP;
1689 }
1690
1691 static int
mlxsw_sp_acl_tcam_flower_rule_activity_get(struct mlxsw_sp * mlxsw_sp,void * rule_priv,bool * activity)1692 mlxsw_sp_acl_tcam_flower_rule_activity_get(struct mlxsw_sp *mlxsw_sp,
1693 void *rule_priv, bool *activity)
1694 {
1695 struct mlxsw_sp_acl_tcam_flower_rule *rule = rule_priv;
1696
1697 return mlxsw_sp_acl_tcam_ventry_activity_get(mlxsw_sp, &rule->ventry,
1698 activity);
1699 }
1700
1701 static const struct mlxsw_sp_acl_profile_ops mlxsw_sp_acl_tcam_flower_ops = {
1702 .ruleset_priv_size = sizeof(struct mlxsw_sp_acl_tcam_flower_ruleset),
1703 .ruleset_add = mlxsw_sp_acl_tcam_flower_ruleset_add,
1704 .ruleset_del = mlxsw_sp_acl_tcam_flower_ruleset_del,
1705 .ruleset_bind = mlxsw_sp_acl_tcam_flower_ruleset_bind,
1706 .ruleset_unbind = mlxsw_sp_acl_tcam_flower_ruleset_unbind,
1707 .ruleset_group_id = mlxsw_sp_acl_tcam_flower_ruleset_group_id,
1708 .rule_priv_size = sizeof(struct mlxsw_sp_acl_tcam_flower_rule),
1709 .rule_add = mlxsw_sp_acl_tcam_flower_rule_add,
1710 .rule_del = mlxsw_sp_acl_tcam_flower_rule_del,
1711 .rule_action_replace = mlxsw_sp_acl_tcam_flower_rule_action_replace,
1712 .rule_activity_get = mlxsw_sp_acl_tcam_flower_rule_activity_get,
1713 };
1714
1715 struct mlxsw_sp_acl_tcam_mr_ruleset {
1716 struct mlxsw_sp_acl_tcam_vchunk *vchunk;
1717 struct mlxsw_sp_acl_tcam_vgroup vgroup;
1718 };
1719
1720 struct mlxsw_sp_acl_tcam_mr_rule {
1721 struct mlxsw_sp_acl_tcam_ventry ventry;
1722 };
1723
1724 static int
mlxsw_sp_acl_tcam_mr_ruleset_add(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_tcam * tcam,void * ruleset_priv,struct mlxsw_afk_element_usage * tmplt_elusage,unsigned int * p_min_prio,unsigned int * p_max_prio)1725 mlxsw_sp_acl_tcam_mr_ruleset_add(struct mlxsw_sp *mlxsw_sp,
1726 struct mlxsw_sp_acl_tcam *tcam,
1727 void *ruleset_priv,
1728 struct mlxsw_afk_element_usage *tmplt_elusage,
1729 unsigned int *p_min_prio,
1730 unsigned int *p_max_prio)
1731 {
1732 struct mlxsw_sp_acl_tcam_mr_ruleset *ruleset = ruleset_priv;
1733 int err;
1734
1735 err = mlxsw_sp_acl_tcam_vgroup_add(mlxsw_sp, tcam, &ruleset->vgroup,
1736 mlxsw_sp_acl_tcam_patterns,
1737 MLXSW_SP_ACL_TCAM_PATTERNS_COUNT,
1738 tmplt_elusage, false,
1739 p_min_prio, p_max_prio);
1740 if (err)
1741 return err;
1742
1743 /* For most of the TCAM clients it would make sense to take a tcam chunk
1744 * only when the first rule is written. This is not the case for
1745 * multicast router as it is required to bind the multicast router to a
1746 * specific ACL Group ID which must exist in HW before multicast router
1747 * is initialized.
1748 */
1749 ruleset->vchunk = mlxsw_sp_acl_tcam_vchunk_get(mlxsw_sp,
1750 &ruleset->vgroup, 1,
1751 tmplt_elusage);
1752 if (IS_ERR(ruleset->vchunk)) {
1753 err = PTR_ERR(ruleset->vchunk);
1754 goto err_chunk_get;
1755 }
1756
1757 return 0;
1758
1759 err_chunk_get:
1760 mlxsw_sp_acl_tcam_vgroup_del(&ruleset->vgroup);
1761 return err;
1762 }
1763
1764 static void
mlxsw_sp_acl_tcam_mr_ruleset_del(struct mlxsw_sp * mlxsw_sp,void * ruleset_priv)1765 mlxsw_sp_acl_tcam_mr_ruleset_del(struct mlxsw_sp *mlxsw_sp, void *ruleset_priv)
1766 {
1767 struct mlxsw_sp_acl_tcam_mr_ruleset *ruleset = ruleset_priv;
1768
1769 mlxsw_sp_acl_tcam_vchunk_put(mlxsw_sp, ruleset->vchunk);
1770 mlxsw_sp_acl_tcam_vgroup_del(&ruleset->vgroup);
1771 }
1772
1773 static int
mlxsw_sp_acl_tcam_mr_ruleset_bind(struct mlxsw_sp * mlxsw_sp,void * ruleset_priv,struct mlxsw_sp_port * mlxsw_sp_port,bool ingress)1774 mlxsw_sp_acl_tcam_mr_ruleset_bind(struct mlxsw_sp *mlxsw_sp, void *ruleset_priv,
1775 struct mlxsw_sp_port *mlxsw_sp_port,
1776 bool ingress)
1777 {
1778 /* Binding is done when initializing multicast router */
1779 return 0;
1780 }
1781
1782 static void
mlxsw_sp_acl_tcam_mr_ruleset_unbind(struct mlxsw_sp * mlxsw_sp,void * ruleset_priv,struct mlxsw_sp_port * mlxsw_sp_port,bool ingress)1783 mlxsw_sp_acl_tcam_mr_ruleset_unbind(struct mlxsw_sp *mlxsw_sp,
1784 void *ruleset_priv,
1785 struct mlxsw_sp_port *mlxsw_sp_port,
1786 bool ingress)
1787 {
1788 }
1789
1790 static u16
mlxsw_sp_acl_tcam_mr_ruleset_group_id(void * ruleset_priv)1791 mlxsw_sp_acl_tcam_mr_ruleset_group_id(void *ruleset_priv)
1792 {
1793 struct mlxsw_sp_acl_tcam_mr_ruleset *ruleset = ruleset_priv;
1794
1795 return mlxsw_sp_acl_tcam_group_id(&ruleset->vgroup.group);
1796 }
1797
1798 static int
mlxsw_sp_acl_tcam_mr_rule_add(struct mlxsw_sp * mlxsw_sp,void * ruleset_priv,void * rule_priv,struct mlxsw_sp_acl_rule_info * rulei)1799 mlxsw_sp_acl_tcam_mr_rule_add(struct mlxsw_sp *mlxsw_sp, void *ruleset_priv,
1800 void *rule_priv,
1801 struct mlxsw_sp_acl_rule_info *rulei)
1802 {
1803 struct mlxsw_sp_acl_tcam_mr_ruleset *ruleset = ruleset_priv;
1804 struct mlxsw_sp_acl_tcam_mr_rule *rule = rule_priv;
1805
1806 return mlxsw_sp_acl_tcam_ventry_add(mlxsw_sp, &ruleset->vgroup,
1807 &rule->ventry, rulei);
1808 }
1809
1810 static void
mlxsw_sp_acl_tcam_mr_rule_del(struct mlxsw_sp * mlxsw_sp,void * rule_priv)1811 mlxsw_sp_acl_tcam_mr_rule_del(struct mlxsw_sp *mlxsw_sp, void *rule_priv)
1812 {
1813 struct mlxsw_sp_acl_tcam_mr_rule *rule = rule_priv;
1814
1815 mlxsw_sp_acl_tcam_ventry_del(mlxsw_sp, &rule->ventry);
1816 }
1817
1818 static int
mlxsw_sp_acl_tcam_mr_rule_action_replace(struct mlxsw_sp * mlxsw_sp,void * rule_priv,struct mlxsw_sp_acl_rule_info * rulei)1819 mlxsw_sp_acl_tcam_mr_rule_action_replace(struct mlxsw_sp *mlxsw_sp,
1820 void *rule_priv,
1821 struct mlxsw_sp_acl_rule_info *rulei)
1822 {
1823 struct mlxsw_sp_acl_tcam_mr_rule *rule = rule_priv;
1824
1825 return mlxsw_sp_acl_tcam_ventry_action_replace(mlxsw_sp, &rule->ventry,
1826 rulei);
1827 }
1828
1829 static int
mlxsw_sp_acl_tcam_mr_rule_activity_get(struct mlxsw_sp * mlxsw_sp,void * rule_priv,bool * activity)1830 mlxsw_sp_acl_tcam_mr_rule_activity_get(struct mlxsw_sp *mlxsw_sp,
1831 void *rule_priv, bool *activity)
1832 {
1833 struct mlxsw_sp_acl_tcam_mr_rule *rule = rule_priv;
1834
1835 return mlxsw_sp_acl_tcam_ventry_activity_get(mlxsw_sp, &rule->ventry,
1836 activity);
1837 }
1838
1839 static const struct mlxsw_sp_acl_profile_ops mlxsw_sp_acl_tcam_mr_ops = {
1840 .ruleset_priv_size = sizeof(struct mlxsw_sp_acl_tcam_mr_ruleset),
1841 .ruleset_add = mlxsw_sp_acl_tcam_mr_ruleset_add,
1842 .ruleset_del = mlxsw_sp_acl_tcam_mr_ruleset_del,
1843 .ruleset_bind = mlxsw_sp_acl_tcam_mr_ruleset_bind,
1844 .ruleset_unbind = mlxsw_sp_acl_tcam_mr_ruleset_unbind,
1845 .ruleset_group_id = mlxsw_sp_acl_tcam_mr_ruleset_group_id,
1846 .rule_priv_size = sizeof(struct mlxsw_sp_acl_tcam_mr_rule),
1847 .rule_add = mlxsw_sp_acl_tcam_mr_rule_add,
1848 .rule_del = mlxsw_sp_acl_tcam_mr_rule_del,
1849 .rule_action_replace = mlxsw_sp_acl_tcam_mr_rule_action_replace,
1850 .rule_activity_get = mlxsw_sp_acl_tcam_mr_rule_activity_get,
1851 };
1852
1853 static const struct mlxsw_sp_acl_profile_ops *
1854 mlxsw_sp_acl_tcam_profile_ops_arr[] = {
1855 [MLXSW_SP_ACL_PROFILE_FLOWER] = &mlxsw_sp_acl_tcam_flower_ops,
1856 [MLXSW_SP_ACL_PROFILE_MR] = &mlxsw_sp_acl_tcam_mr_ops,
1857 };
1858
1859 const struct mlxsw_sp_acl_profile_ops *
mlxsw_sp_acl_tcam_profile_ops(struct mlxsw_sp * mlxsw_sp,enum mlxsw_sp_acl_profile profile)1860 mlxsw_sp_acl_tcam_profile_ops(struct mlxsw_sp *mlxsw_sp,
1861 enum mlxsw_sp_acl_profile profile)
1862 {
1863 const struct mlxsw_sp_acl_profile_ops *ops;
1864
1865 if (WARN_ON(profile >= ARRAY_SIZE(mlxsw_sp_acl_tcam_profile_ops_arr)))
1866 return NULL;
1867 ops = mlxsw_sp_acl_tcam_profile_ops_arr[profile];
1868 if (WARN_ON(!ops))
1869 return NULL;
1870 return ops;
1871 }
1872