1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */
3
4#include <linux/bitmap.h>
5#include <linux/errno.h>
6#include <linux/genalloc.h>
7#include <linux/gfp.h>
8#include <linux/kernel.h>
9#include <linux/list.h>
10#include <linux/mutex.h>
11#include <linux/objagg.h>
12#include <linux/rtnetlink.h>
13#include <linux/slab.h>
14
15#include "core.h"
16#include "reg.h"
17#include "spectrum.h"
18#include "spectrum_acl_tcam.h"
19
20/* gen_pool_alloc() returns 0 when allocation fails, so use an offset */
21#define MLXSW_SP_ACL_ERP_GENALLOC_OFFSET 0x100
22#define MLXSW_SP_ACL_ERP_MAX_PER_REGION 16
23
24struct mlxsw_sp_acl_erp_core {
25 unsigned int erpt_entries_size[MLXSW_SP_ACL_ATCAM_REGION_TYPE_MAX + 1];
26 struct gen_pool *erp_tables;
27 struct mlxsw_sp *mlxsw_sp;
28 struct mlxsw_sp_acl_bf *bf;
29 unsigned int num_erp_banks;
30};
31
32struct mlxsw_sp_acl_erp_key {
33 char mask[MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN];
34#define __MASK_LEN 0x38
35#define __MASK_IDX(i) (__MASK_LEN - (i) - 1)
36 bool ctcam;
37};
38
39struct mlxsw_sp_acl_erp {
40 struct mlxsw_sp_acl_erp_key key;
41 u8 id;
42 u8 index;
43 DECLARE_BITMAP(mask_bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN);
44 struct list_head list;
45 struct mlxsw_sp_acl_erp_table *erp_table;
46};
47
48struct mlxsw_sp_acl_erp_master_mask {
49 DECLARE_BITMAP(bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN);
50 unsigned int count[MLXSW_SP_ACL_TCAM_MASK_LEN];
51};
52
53struct mlxsw_sp_acl_erp_table {
54 struct mlxsw_sp_acl_erp_master_mask master_mask;
55 DECLARE_BITMAP(erp_id_bitmap, MLXSW_SP_ACL_ERP_MAX_PER_REGION);
56 DECLARE_BITMAP(erp_index_bitmap, MLXSW_SP_ACL_ERP_MAX_PER_REGION);
57 struct list_head atcam_erps_list;
58 struct mlxsw_sp_acl_erp_core *erp_core;
59 struct mlxsw_sp_acl_atcam_region *aregion;
60 const struct mlxsw_sp_acl_erp_table_ops *ops;
61 unsigned long base_index;
62 unsigned int num_atcam_erps;
63 unsigned int num_max_atcam_erps;
64 unsigned int num_ctcam_erps;
65 unsigned int num_deltas;
66 struct objagg *objagg;
67 struct mutex objagg_lock; /* guards objagg manipulation */
68};
69
70struct mlxsw_sp_acl_erp_table_ops {
71 struct mlxsw_sp_acl_erp *
72 (*erp_create)(struct mlxsw_sp_acl_erp_table *erp_table,
73 struct mlxsw_sp_acl_erp_key *key);
74 void (*erp_destroy)(struct mlxsw_sp_acl_erp_table *erp_table,
75 struct mlxsw_sp_acl_erp *erp);
76};
77
78static struct mlxsw_sp_acl_erp *
79mlxsw_sp_acl_erp_mask_create(struct mlxsw_sp_acl_erp_table *erp_table,
80 struct mlxsw_sp_acl_erp_key *key);
81static void
82mlxsw_sp_acl_erp_mask_destroy(struct mlxsw_sp_acl_erp_table *erp_table,
83 struct mlxsw_sp_acl_erp *erp);
84static struct mlxsw_sp_acl_erp *
85mlxsw_sp_acl_erp_second_mask_create(struct mlxsw_sp_acl_erp_table *erp_table,
86 struct mlxsw_sp_acl_erp_key *key);
87static void
88mlxsw_sp_acl_erp_second_mask_destroy(struct mlxsw_sp_acl_erp_table *erp_table,
89 struct mlxsw_sp_acl_erp *erp);
90static struct mlxsw_sp_acl_erp *
91mlxsw_sp_acl_erp_first_mask_create(struct mlxsw_sp_acl_erp_table *erp_table,
92 struct mlxsw_sp_acl_erp_key *key);
93static void
94mlxsw_sp_acl_erp_first_mask_destroy(struct mlxsw_sp_acl_erp_table *erp_table,
95 struct mlxsw_sp_acl_erp *erp);
96static void
97mlxsw_sp_acl_erp_no_mask_destroy(struct mlxsw_sp_acl_erp_table *erp_table,
98 struct mlxsw_sp_acl_erp *erp);
99
100static const struct mlxsw_sp_acl_erp_table_ops erp_multiple_masks_ops = {
101 .erp_create = mlxsw_sp_acl_erp_mask_create,
102 .erp_destroy = mlxsw_sp_acl_erp_mask_destroy,
103};
104
105static const struct mlxsw_sp_acl_erp_table_ops erp_two_masks_ops = {
106 .erp_create = mlxsw_sp_acl_erp_mask_create,
107 .erp_destroy = mlxsw_sp_acl_erp_second_mask_destroy,
108};
109
110static const struct mlxsw_sp_acl_erp_table_ops erp_single_mask_ops = {
111 .erp_create = mlxsw_sp_acl_erp_second_mask_create,
112 .erp_destroy = mlxsw_sp_acl_erp_first_mask_destroy,
113};
114
115static const struct mlxsw_sp_acl_erp_table_ops erp_no_mask_ops = {
116 .erp_create = mlxsw_sp_acl_erp_first_mask_create,
117 .erp_destroy = mlxsw_sp_acl_erp_no_mask_destroy,
118};
119
120static bool
121mlxsw_sp_acl_erp_table_is_used(const struct mlxsw_sp_acl_erp_table *erp_table)
122{
123 return erp_table->ops != &erp_single_mask_ops &&
124 erp_table->ops != &erp_no_mask_ops;
125}
126
127static unsigned int
128mlxsw_sp_acl_erp_bank_get(const struct mlxsw_sp_acl_erp *erp)
129{
130 return erp->index % erp->erp_table->erp_core->num_erp_banks;
131}
132
133static unsigned int
134mlxsw_sp_acl_erp_table_entry_size(const struct mlxsw_sp_acl_erp_table *erp_table)
135{
136 struct mlxsw_sp_acl_atcam_region *aregion = erp_table->aregion;
137 struct mlxsw_sp_acl_erp_core *erp_core = erp_table->erp_core;
138
139 return erp_core->erpt_entries_size[aregion->type];
140}
141
142static int mlxsw_sp_acl_erp_id_get(struct mlxsw_sp_acl_erp_table *erp_table,
143 u8 *p_id)
144{
145 u8 id;
146
147 id = find_first_zero_bit(addr: erp_table->erp_id_bitmap,
148 MLXSW_SP_ACL_ERP_MAX_PER_REGION);
149 if (id < MLXSW_SP_ACL_ERP_MAX_PER_REGION) {
150 __set_bit(id, erp_table->erp_id_bitmap);
151 *p_id = id;
152 return 0;
153 }
154
155 return -ENOBUFS;
156}
157
158static void mlxsw_sp_acl_erp_id_put(struct mlxsw_sp_acl_erp_table *erp_table,
159 u8 id)
160{
161 __clear_bit(id, erp_table->erp_id_bitmap);
162}
163
164static void
165mlxsw_sp_acl_erp_master_mask_bit_set(unsigned long bit,
166 struct mlxsw_sp_acl_erp_master_mask *mask)
167{
168 if (mask->count[bit]++ == 0)
169 __set_bit(bit, mask->bitmap);
170}
171
172static void
173mlxsw_sp_acl_erp_master_mask_bit_clear(unsigned long bit,
174 struct mlxsw_sp_acl_erp_master_mask *mask)
175{
176 if (--mask->count[bit] == 0)
177 __clear_bit(bit, mask->bitmap);
178}
179
180static int
181mlxsw_sp_acl_erp_master_mask_update(struct mlxsw_sp_acl_erp_table *erp_table)
182{
183 struct mlxsw_sp_acl_tcam_region *region = erp_table->aregion->region;
184 struct mlxsw_sp *mlxsw_sp = region->mlxsw_sp;
185 char percr_pl[MLXSW_REG_PERCR_LEN];
186 char *master_mask;
187
188 mlxsw_reg_percr_pack(payload: percr_pl, region_id: region->id);
189 master_mask = mlxsw_reg_percr_master_mask_data(buf: percr_pl);
190 bitmap_to_arr32(buf: (u32 *) master_mask, bitmap: erp_table->master_mask.bitmap,
191 MLXSW_SP_ACL_TCAM_MASK_LEN);
192
193 return mlxsw_reg_write(mlxsw_core: mlxsw_sp->core, MLXSW_REG(percr), payload: percr_pl);
194}
195
196static int
197mlxsw_sp_acl_erp_master_mask_set(struct mlxsw_sp_acl_erp_table *erp_table,
198 struct mlxsw_sp_acl_erp_key *key)
199{
200 DECLARE_BITMAP(mask_bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN);
201 unsigned long bit;
202 int err;
203
204 bitmap_from_arr32(bitmap: mask_bitmap, buf: (u32 *) key->mask,
205 MLXSW_SP_ACL_TCAM_MASK_LEN);
206 for_each_set_bit(bit, mask_bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN)
207 mlxsw_sp_acl_erp_master_mask_bit_set(bit,
208 mask: &erp_table->master_mask);
209
210 err = mlxsw_sp_acl_erp_master_mask_update(erp_table);
211 if (err)
212 goto err_master_mask_update;
213
214 return 0;
215
216err_master_mask_update:
217 for_each_set_bit(bit, mask_bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN)
218 mlxsw_sp_acl_erp_master_mask_bit_clear(bit,
219 mask: &erp_table->master_mask);
220 return err;
221}
222
223static int
224mlxsw_sp_acl_erp_master_mask_clear(struct mlxsw_sp_acl_erp_table *erp_table,
225 struct mlxsw_sp_acl_erp_key *key)
226{
227 DECLARE_BITMAP(mask_bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN);
228 unsigned long bit;
229 int err;
230
231 bitmap_from_arr32(bitmap: mask_bitmap, buf: (u32 *) key->mask,
232 MLXSW_SP_ACL_TCAM_MASK_LEN);
233 for_each_set_bit(bit, mask_bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN)
234 mlxsw_sp_acl_erp_master_mask_bit_clear(bit,
235 mask: &erp_table->master_mask);
236
237 err = mlxsw_sp_acl_erp_master_mask_update(erp_table);
238 if (err)
239 goto err_master_mask_update;
240
241 return 0;
242
243err_master_mask_update:
244 for_each_set_bit(bit, mask_bitmap, MLXSW_SP_ACL_TCAM_MASK_LEN)
245 mlxsw_sp_acl_erp_master_mask_bit_set(bit,
246 mask: &erp_table->master_mask);
247 return err;
248}
249
250static struct mlxsw_sp_acl_erp *
251mlxsw_sp_acl_erp_generic_create(struct mlxsw_sp_acl_erp_table *erp_table,
252 struct mlxsw_sp_acl_erp_key *key)
253{
254 struct mlxsw_sp_acl_erp *erp;
255 int err;
256
257 erp = kzalloc(size: sizeof(*erp), GFP_KERNEL);
258 if (!erp)
259 return ERR_PTR(error: -ENOMEM);
260
261 err = mlxsw_sp_acl_erp_id_get(erp_table, p_id: &erp->id);
262 if (err)
263 goto err_erp_id_get;
264
265 memcpy(&erp->key, key, sizeof(*key));
266 list_add(new: &erp->list, head: &erp_table->atcam_erps_list);
267 erp_table->num_atcam_erps++;
268 erp->erp_table = erp_table;
269
270 err = mlxsw_sp_acl_erp_master_mask_set(erp_table, key: &erp->key);
271 if (err)
272 goto err_master_mask_set;
273
274 return erp;
275
276err_master_mask_set:
277 erp_table->num_atcam_erps--;
278 list_del(entry: &erp->list);
279 mlxsw_sp_acl_erp_id_put(erp_table, id: erp->id);
280err_erp_id_get:
281 kfree(objp: erp);
282 return ERR_PTR(error: err);
283}
284
285static void
286mlxsw_sp_acl_erp_generic_destroy(struct mlxsw_sp_acl_erp *erp)
287{
288 struct mlxsw_sp_acl_erp_table *erp_table = erp->erp_table;
289
290 mlxsw_sp_acl_erp_master_mask_clear(erp_table, key: &erp->key);
291 erp_table->num_atcam_erps--;
292 list_del(entry: &erp->list);
293 mlxsw_sp_acl_erp_id_put(erp_table, id: erp->id);
294 kfree(objp: erp);
295}
296
297static int
298mlxsw_sp_acl_erp_table_alloc(struct mlxsw_sp_acl_erp_core *erp_core,
299 unsigned int num_erps,
300 enum mlxsw_sp_acl_atcam_region_type region_type,
301 unsigned long *p_index)
302{
303 unsigned int num_rows, entry_size;
304 unsigned long index;
305
306 /* We only allow allocations of entire rows */
307 if (num_erps % erp_core->num_erp_banks != 0)
308 return -EINVAL;
309
310 entry_size = erp_core->erpt_entries_size[region_type];
311 num_rows = num_erps / erp_core->num_erp_banks;
312
313 index = gen_pool_alloc(pool: erp_core->erp_tables, size: num_rows * entry_size);
314 if (!index)
315 return -ENOBUFS;
316
317 *p_index = index - MLXSW_SP_ACL_ERP_GENALLOC_OFFSET;
318
319 return 0;
320}
321
322static void
323mlxsw_sp_acl_erp_table_free(struct mlxsw_sp_acl_erp_core *erp_core,
324 unsigned int num_erps,
325 enum mlxsw_sp_acl_atcam_region_type region_type,
326 unsigned long index)
327{
328 unsigned long base_index;
329 unsigned int entry_size;
330 size_t size;
331
332 entry_size = erp_core->erpt_entries_size[region_type];
333 base_index = index + MLXSW_SP_ACL_ERP_GENALLOC_OFFSET;
334 size = num_erps / erp_core->num_erp_banks * entry_size;
335 gen_pool_free(pool: erp_core->erp_tables, addr: base_index, size);
336}
337
338static struct mlxsw_sp_acl_erp *
339mlxsw_sp_acl_erp_table_master_rp(struct mlxsw_sp_acl_erp_table *erp_table)
340{
341 if (!list_is_singular(head: &erp_table->atcam_erps_list))
342 return NULL;
343
344 return list_first_entry(&erp_table->atcam_erps_list,
345 struct mlxsw_sp_acl_erp, list);
346}
347
348static int mlxsw_sp_acl_erp_index_get(struct mlxsw_sp_acl_erp_table *erp_table,
349 u8 *p_index)
350{
351 u8 index;
352
353 index = find_first_zero_bit(addr: erp_table->erp_index_bitmap,
354 size: erp_table->num_max_atcam_erps);
355 if (index < erp_table->num_max_atcam_erps) {
356 __set_bit(index, erp_table->erp_index_bitmap);
357 *p_index = index;
358 return 0;
359 }
360
361 return -ENOBUFS;
362}
363
364static void mlxsw_sp_acl_erp_index_put(struct mlxsw_sp_acl_erp_table *erp_table,
365 u8 index)
366{
367 __clear_bit(index, erp_table->erp_index_bitmap);
368}
369
370static void
371mlxsw_sp_acl_erp_table_locate(const struct mlxsw_sp_acl_erp_table *erp_table,
372 const struct mlxsw_sp_acl_erp *erp,
373 u8 *p_erpt_bank, u8 *p_erpt_index)
374{
375 unsigned int entry_size = mlxsw_sp_acl_erp_table_entry_size(erp_table);
376 struct mlxsw_sp_acl_erp_core *erp_core = erp_table->erp_core;
377 unsigned int row;
378
379 *p_erpt_bank = erp->index % erp_core->num_erp_banks;
380 row = erp->index / erp_core->num_erp_banks;
381 *p_erpt_index = erp_table->base_index + row * entry_size;
382}
383
384static int
385mlxsw_sp_acl_erp_table_erp_add(struct mlxsw_sp_acl_erp_table *erp_table,
386 struct mlxsw_sp_acl_erp *erp)
387{
388 struct mlxsw_sp *mlxsw_sp = erp_table->erp_core->mlxsw_sp;
389 enum mlxsw_reg_perpt_key_size key_size;
390 char perpt_pl[MLXSW_REG_PERPT_LEN];
391 u8 erpt_bank, erpt_index;
392
393 mlxsw_sp_acl_erp_table_locate(erp_table, erp, p_erpt_bank: &erpt_bank, p_erpt_index: &erpt_index);
394 key_size = (enum mlxsw_reg_perpt_key_size) erp_table->aregion->type;
395 mlxsw_reg_perpt_pack(payload: perpt_pl, erpt_bank, erpt_index, key_size, erp_id: erp->id,
396 erpt_base_bank: 0, erpt_base_index: erp_table->base_index, erp_index: erp->index,
397 mask: erp->key.mask);
398 mlxsw_reg_perpt_erp_vector_pack(payload: perpt_pl, erp_vector: erp_table->erp_index_bitmap,
399 MLXSW_SP_ACL_ERP_MAX_PER_REGION);
400 mlxsw_reg_perpt_erp_vector_set(buf: perpt_pl, index: erp->index, val: true);
401 return mlxsw_reg_write(mlxsw_core: mlxsw_sp->core, MLXSW_REG(perpt), payload: perpt_pl);
402}
403
404static void mlxsw_sp_acl_erp_table_erp_del(struct mlxsw_sp_acl_erp *erp)
405{
406 char empty_mask[MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN] = { 0 };
407 struct mlxsw_sp_acl_erp_table *erp_table = erp->erp_table;
408 struct mlxsw_sp *mlxsw_sp = erp_table->erp_core->mlxsw_sp;
409 enum mlxsw_reg_perpt_key_size key_size;
410 char perpt_pl[MLXSW_REG_PERPT_LEN];
411 u8 erpt_bank, erpt_index;
412
413 mlxsw_sp_acl_erp_table_locate(erp_table, erp, p_erpt_bank: &erpt_bank, p_erpt_index: &erpt_index);
414 key_size = (enum mlxsw_reg_perpt_key_size) erp_table->aregion->type;
415 mlxsw_reg_perpt_pack(payload: perpt_pl, erpt_bank, erpt_index, key_size, erp_id: erp->id,
416 erpt_base_bank: 0, erpt_base_index: erp_table->base_index, erp_index: erp->index, mask: empty_mask);
417 mlxsw_reg_perpt_erp_vector_pack(payload: perpt_pl, erp_vector: erp_table->erp_index_bitmap,
418 MLXSW_SP_ACL_ERP_MAX_PER_REGION);
419 mlxsw_reg_perpt_erp_vector_set(buf: perpt_pl, index: erp->index, val: false);
420 mlxsw_reg_write(mlxsw_core: mlxsw_sp->core, MLXSW_REG(perpt), payload: perpt_pl);
421}
422
423static int
424mlxsw_sp_acl_erp_table_enable(struct mlxsw_sp_acl_erp_table *erp_table,
425 bool ctcam_le)
426{
427 struct mlxsw_sp_acl_tcam_region *region = erp_table->aregion->region;
428 struct mlxsw_sp *mlxsw_sp = erp_table->erp_core->mlxsw_sp;
429 char pererp_pl[MLXSW_REG_PERERP_LEN];
430
431 mlxsw_reg_pererp_pack(payload: pererp_pl, region_id: region->id, ctcam_le, erpt_pointer_valid: true, erpt_bank_pointer: 0,
432 erpt_pointer: erp_table->base_index, master_rp_id: 0);
433 mlxsw_reg_pererp_erp_vector_pack(payload: pererp_pl, erp_vector: erp_table->erp_index_bitmap,
434 MLXSW_SP_ACL_ERP_MAX_PER_REGION);
435
436 return mlxsw_reg_write(mlxsw_core: mlxsw_sp->core, MLXSW_REG(pererp), payload: pererp_pl);
437}
438
439static void
440mlxsw_sp_acl_erp_table_disable(struct mlxsw_sp_acl_erp_table *erp_table)
441{
442 struct mlxsw_sp_acl_tcam_region *region = erp_table->aregion->region;
443 struct mlxsw_sp *mlxsw_sp = erp_table->erp_core->mlxsw_sp;
444 char pererp_pl[MLXSW_REG_PERERP_LEN];
445 struct mlxsw_sp_acl_erp *master_rp;
446
447 master_rp = mlxsw_sp_acl_erp_table_master_rp(erp_table);
448 /* It is possible we do not have a master RP when we disable the
449 * table when there are no rules in the A-TCAM and the last C-TCAM
450 * rule is deleted
451 */
452 mlxsw_reg_pererp_pack(payload: pererp_pl, region_id: region->id, ctcam_le: false, erpt_pointer_valid: false, erpt_bank_pointer: 0, erpt_pointer: 0,
453 master_rp_id: master_rp ? master_rp->id : 0);
454 mlxsw_reg_write(mlxsw_core: mlxsw_sp->core, MLXSW_REG(pererp), payload: pererp_pl);
455}
456
457static int
458mlxsw_sp_acl_erp_table_relocate(struct mlxsw_sp_acl_erp_table *erp_table)
459{
460 struct mlxsw_sp_acl_erp *erp;
461 int err;
462
463 list_for_each_entry(erp, &erp_table->atcam_erps_list, list) {
464 err = mlxsw_sp_acl_erp_table_erp_add(erp_table, erp);
465 if (err)
466 goto err_table_erp_add;
467 }
468
469 return 0;
470
471err_table_erp_add:
472 list_for_each_entry_continue_reverse(erp, &erp_table->atcam_erps_list,
473 list)
474 mlxsw_sp_acl_erp_table_erp_del(erp);
475 return err;
476}
477
478static int
479mlxsw_sp_acl_erp_table_expand(struct mlxsw_sp_acl_erp_table *erp_table)
480{
481 unsigned int num_erps, old_num_erps = erp_table->num_max_atcam_erps;
482 struct mlxsw_sp_acl_erp_core *erp_core = erp_table->erp_core;
483 unsigned long old_base_index = erp_table->base_index;
484 bool ctcam_le = erp_table->num_ctcam_erps > 0;
485 int err;
486
487 if (erp_table->num_atcam_erps < erp_table->num_max_atcam_erps)
488 return 0;
489
490 if (erp_table->num_max_atcam_erps == MLXSW_SP_ACL_ERP_MAX_PER_REGION)
491 return -ENOBUFS;
492
493 num_erps = old_num_erps + erp_core->num_erp_banks;
494 err = mlxsw_sp_acl_erp_table_alloc(erp_core, num_erps,
495 region_type: erp_table->aregion->type,
496 p_index: &erp_table->base_index);
497 if (err)
498 return err;
499 erp_table->num_max_atcam_erps = num_erps;
500
501 err = mlxsw_sp_acl_erp_table_relocate(erp_table);
502 if (err)
503 goto err_table_relocate;
504
505 err = mlxsw_sp_acl_erp_table_enable(erp_table, ctcam_le);
506 if (err)
507 goto err_table_enable;
508
509 mlxsw_sp_acl_erp_table_free(erp_core, num_erps: old_num_erps,
510 region_type: erp_table->aregion->type, index: old_base_index);
511
512 return 0;
513
514err_table_enable:
515err_table_relocate:
516 erp_table->num_max_atcam_erps = old_num_erps;
517 mlxsw_sp_acl_erp_table_free(erp_core, num_erps,
518 region_type: erp_table->aregion->type,
519 index: erp_table->base_index);
520 erp_table->base_index = old_base_index;
521 return err;
522}
523
524static int
525mlxsw_acl_erp_table_bf_add(struct mlxsw_sp_acl_erp_table *erp_table,
526 struct mlxsw_sp_acl_erp *erp)
527{
528 struct mlxsw_sp_acl_atcam_region *aregion = erp_table->aregion;
529 unsigned int erp_bank = mlxsw_sp_acl_erp_bank_get(erp);
530 struct mlxsw_sp_acl_atcam_entry *aentry;
531 int err;
532
533 list_for_each_entry(aentry, &aregion->entries_list, list) {
534 err = mlxsw_sp_acl_bf_entry_add(mlxsw_sp: aregion->region->mlxsw_sp,
535 bf: erp_table->erp_core->bf,
536 aregion, erp_bank, aentry);
537 if (err)
538 goto bf_entry_add_err;
539 }
540
541 return 0;
542
543bf_entry_add_err:
544 list_for_each_entry_continue_reverse(aentry, &aregion->entries_list,
545 list)
546 mlxsw_sp_acl_bf_entry_del(mlxsw_sp: aregion->region->mlxsw_sp,
547 bf: erp_table->erp_core->bf,
548 aregion, erp_bank, aentry);
549 return err;
550}
551
552static void
553mlxsw_acl_erp_table_bf_del(struct mlxsw_sp_acl_erp_table *erp_table,
554 struct mlxsw_sp_acl_erp *erp)
555{
556 struct mlxsw_sp_acl_atcam_region *aregion = erp_table->aregion;
557 unsigned int erp_bank = mlxsw_sp_acl_erp_bank_get(erp);
558 struct mlxsw_sp_acl_atcam_entry *aentry;
559
560 list_for_each_entry_reverse(aentry, &aregion->entries_list, list)
561 mlxsw_sp_acl_bf_entry_del(mlxsw_sp: aregion->region->mlxsw_sp,
562 bf: erp_table->erp_core->bf,
563 aregion, erp_bank, aentry);
564}
565
566static int
567mlxsw_sp_acl_erp_region_table_trans(struct mlxsw_sp_acl_erp_table *erp_table)
568{
569 struct mlxsw_sp_acl_erp_core *erp_core = erp_table->erp_core;
570 struct mlxsw_sp_acl_erp *master_rp;
571 int err;
572
573 /* Initially, allocate a single eRP row. Expand later as needed */
574 err = mlxsw_sp_acl_erp_table_alloc(erp_core, num_erps: erp_core->num_erp_banks,
575 region_type: erp_table->aregion->type,
576 p_index: &erp_table->base_index);
577 if (err)
578 return err;
579 erp_table->num_max_atcam_erps = erp_core->num_erp_banks;
580
581 /* Transition the sole RP currently configured (the master RP)
582 * to the eRP table
583 */
584 master_rp = mlxsw_sp_acl_erp_table_master_rp(erp_table);
585 if (!master_rp) {
586 err = -EINVAL;
587 goto err_table_master_rp;
588 }
589
590 /* Make sure the master RP is using a valid index, as
591 * only a single eRP row is currently allocated.
592 */
593 master_rp->index = 0;
594 __set_bit(master_rp->index, erp_table->erp_index_bitmap);
595
596 err = mlxsw_sp_acl_erp_table_erp_add(erp_table, erp: master_rp);
597 if (err)
598 goto err_table_master_rp_add;
599
600 /* Update Bloom filter before enabling eRP table, as rules
601 * on the master RP were not set to Bloom filter up to this
602 * point.
603 */
604 err = mlxsw_acl_erp_table_bf_add(erp_table, erp: master_rp);
605 if (err)
606 goto err_table_bf_add;
607
608 err = mlxsw_sp_acl_erp_table_enable(erp_table, ctcam_le: false);
609 if (err)
610 goto err_table_enable;
611
612 return 0;
613
614err_table_enable:
615 mlxsw_acl_erp_table_bf_del(erp_table, erp: master_rp);
616err_table_bf_add:
617 mlxsw_sp_acl_erp_table_erp_del(erp: master_rp);
618err_table_master_rp_add:
619 __clear_bit(master_rp->index, erp_table->erp_index_bitmap);
620err_table_master_rp:
621 mlxsw_sp_acl_erp_table_free(erp_core, num_erps: erp_table->num_max_atcam_erps,
622 region_type: erp_table->aregion->type,
623 index: erp_table->base_index);
624 return err;
625}
626
627static void
628mlxsw_sp_acl_erp_region_master_mask_trans(struct mlxsw_sp_acl_erp_table *erp_table)
629{
630 struct mlxsw_sp_acl_erp_core *erp_core = erp_table->erp_core;
631 struct mlxsw_sp_acl_erp *master_rp;
632
633 mlxsw_sp_acl_erp_table_disable(erp_table);
634 master_rp = mlxsw_sp_acl_erp_table_master_rp(erp_table);
635 if (!master_rp)
636 return;
637 mlxsw_acl_erp_table_bf_del(erp_table, erp: master_rp);
638 mlxsw_sp_acl_erp_table_erp_del(erp: master_rp);
639 __clear_bit(master_rp->index, erp_table->erp_index_bitmap);
640 mlxsw_sp_acl_erp_table_free(erp_core, num_erps: erp_table->num_max_atcam_erps,
641 region_type: erp_table->aregion->type,
642 index: erp_table->base_index);
643}
644
645static int
646mlxsw_sp_acl_erp_region_erp_add(struct mlxsw_sp_acl_erp_table *erp_table,
647 struct mlxsw_sp_acl_erp *erp)
648{
649 struct mlxsw_sp_acl_tcam_region *region = erp_table->aregion->region;
650 struct mlxsw_sp *mlxsw_sp = erp_table->erp_core->mlxsw_sp;
651 bool ctcam_le = erp_table->num_ctcam_erps > 0;
652 char pererp_pl[MLXSW_REG_PERERP_LEN];
653
654 mlxsw_reg_pererp_pack(payload: pererp_pl, region_id: region->id, ctcam_le, erpt_pointer_valid: true, erpt_bank_pointer: 0,
655 erpt_pointer: erp_table->base_index, master_rp_id: 0);
656 mlxsw_reg_pererp_erp_vector_pack(payload: pererp_pl, erp_vector: erp_table->erp_index_bitmap,
657 MLXSW_SP_ACL_ERP_MAX_PER_REGION);
658 mlxsw_reg_pererp_erpt_vector_set(buf: pererp_pl, index: erp->index, val: true);
659
660 return mlxsw_reg_write(mlxsw_core: mlxsw_sp->core, MLXSW_REG(pererp), payload: pererp_pl);
661}
662
663static void mlxsw_sp_acl_erp_region_erp_del(struct mlxsw_sp_acl_erp *erp)
664{
665 struct mlxsw_sp_acl_erp_table *erp_table = erp->erp_table;
666 struct mlxsw_sp_acl_tcam_region *region = erp_table->aregion->region;
667 struct mlxsw_sp *mlxsw_sp = erp_table->erp_core->mlxsw_sp;
668 bool ctcam_le = erp_table->num_ctcam_erps > 0;
669 char pererp_pl[MLXSW_REG_PERERP_LEN];
670
671 mlxsw_reg_pererp_pack(payload: pererp_pl, region_id: region->id, ctcam_le, erpt_pointer_valid: true, erpt_bank_pointer: 0,
672 erpt_pointer: erp_table->base_index, master_rp_id: 0);
673 mlxsw_reg_pererp_erp_vector_pack(payload: pererp_pl, erp_vector: erp_table->erp_index_bitmap,
674 MLXSW_SP_ACL_ERP_MAX_PER_REGION);
675 mlxsw_reg_pererp_erpt_vector_set(buf: pererp_pl, index: erp->index, val: false);
676
677 mlxsw_reg_write(mlxsw_core: mlxsw_sp->core, MLXSW_REG(pererp), payload: pererp_pl);
678}
679
680static int
681mlxsw_sp_acl_erp_region_ctcam_enable(struct mlxsw_sp_acl_erp_table *erp_table)
682{
683 /* No need to re-enable lookup in the C-TCAM */
684 if (erp_table->num_ctcam_erps > 1)
685 return 0;
686
687 return mlxsw_sp_acl_erp_table_enable(erp_table, ctcam_le: true);
688}
689
690static void
691mlxsw_sp_acl_erp_region_ctcam_disable(struct mlxsw_sp_acl_erp_table *erp_table)
692{
693 /* Only disable C-TCAM lookup when last C-TCAM eRP is deleted */
694 if (erp_table->num_ctcam_erps > 1)
695 return;
696
697 mlxsw_sp_acl_erp_table_enable(erp_table, ctcam_le: false);
698}
699
700static int
701__mlxsw_sp_acl_erp_table_other_inc(struct mlxsw_sp_acl_erp_table *erp_table,
702 unsigned int *inc_num)
703{
704 int err;
705
706 /* If there are C-TCAM eRP or deltas in use we need to transition
707 * the region to use eRP table, if it is not already done
708 */
709 if (!mlxsw_sp_acl_erp_table_is_used(erp_table)) {
710 err = mlxsw_sp_acl_erp_region_table_trans(erp_table);
711 if (err)
712 return err;
713 }
714
715 /* When C-TCAM or deltas are used, the eRP table must be used */
716 if (erp_table->ops != &erp_multiple_masks_ops)
717 erp_table->ops = &erp_multiple_masks_ops;
718
719 (*inc_num)++;
720
721 return 0;
722}
723
724static int mlxsw_sp_acl_erp_ctcam_inc(struct mlxsw_sp_acl_erp_table *erp_table)
725{
726 return __mlxsw_sp_acl_erp_table_other_inc(erp_table,
727 inc_num: &erp_table->num_ctcam_erps);
728}
729
730static int mlxsw_sp_acl_erp_delta_inc(struct mlxsw_sp_acl_erp_table *erp_table)
731{
732 return __mlxsw_sp_acl_erp_table_other_inc(erp_table,
733 inc_num: &erp_table->num_deltas);
734}
735
736static void
737__mlxsw_sp_acl_erp_table_other_dec(struct mlxsw_sp_acl_erp_table *erp_table,
738 unsigned int *dec_num)
739{
740 (*dec_num)--;
741
742 /* If there are no C-TCAM eRP or deltas in use, the state we
743 * transition to depends on the number of A-TCAM eRPs currently
744 * in use.
745 */
746 if (erp_table->num_ctcam_erps > 0 || erp_table->num_deltas > 0)
747 return;
748
749 switch (erp_table->num_atcam_erps) {
750 case 2:
751 /* Keep using the eRP table, but correctly set the
752 * operations pointer so that when an A-TCAM eRP is
753 * deleted we will transition to use the master mask
754 */
755 erp_table->ops = &erp_two_masks_ops;
756 break;
757 case 1:
758 /* We only kept the eRP table because we had C-TCAM
759 * eRPs in use. Now that the last C-TCAM eRP is gone we
760 * can stop using the table and transition to use the
761 * master mask
762 */
763 mlxsw_sp_acl_erp_region_master_mask_trans(erp_table);
764 erp_table->ops = &erp_single_mask_ops;
765 break;
766 case 0:
767 /* There are no more eRPs of any kind used by the region
768 * so free its eRP table and transition to initial state
769 */
770 mlxsw_sp_acl_erp_table_disable(erp_table);
771 mlxsw_sp_acl_erp_table_free(erp_core: erp_table->erp_core,
772 num_erps: erp_table->num_max_atcam_erps,
773 region_type: erp_table->aregion->type,
774 index: erp_table->base_index);
775 erp_table->ops = &erp_no_mask_ops;
776 break;
777 default:
778 break;
779 }
780}
781
782static void mlxsw_sp_acl_erp_ctcam_dec(struct mlxsw_sp_acl_erp_table *erp_table)
783{
784 __mlxsw_sp_acl_erp_table_other_dec(erp_table,
785 dec_num: &erp_table->num_ctcam_erps);
786}
787
788static void mlxsw_sp_acl_erp_delta_dec(struct mlxsw_sp_acl_erp_table *erp_table)
789{
790 __mlxsw_sp_acl_erp_table_other_dec(erp_table,
791 dec_num: &erp_table->num_deltas);
792}
793
794static struct mlxsw_sp_acl_erp *
795mlxsw_sp_acl_erp_ctcam_mask_create(struct mlxsw_sp_acl_erp_table *erp_table,
796 struct mlxsw_sp_acl_erp_key *key)
797{
798 struct mlxsw_sp_acl_erp *erp;
799 int err;
800
801 erp = kzalloc(size: sizeof(*erp), GFP_KERNEL);
802 if (!erp)
803 return ERR_PTR(error: -ENOMEM);
804
805 memcpy(&erp->key, key, sizeof(*key));
806 bitmap_from_arr32(bitmap: erp->mask_bitmap, buf: (u32 *) key->mask,
807 MLXSW_SP_ACL_TCAM_MASK_LEN);
808
809 err = mlxsw_sp_acl_erp_ctcam_inc(erp_table);
810 if (err)
811 goto err_erp_ctcam_inc;
812
813 erp->erp_table = erp_table;
814
815 err = mlxsw_sp_acl_erp_master_mask_set(erp_table, key: &erp->key);
816 if (err)
817 goto err_master_mask_set;
818
819 err = mlxsw_sp_acl_erp_region_ctcam_enable(erp_table);
820 if (err)
821 goto err_erp_region_ctcam_enable;
822
823 return erp;
824
825err_erp_region_ctcam_enable:
826 mlxsw_sp_acl_erp_master_mask_clear(erp_table, key: &erp->key);
827err_master_mask_set:
828 mlxsw_sp_acl_erp_ctcam_dec(erp_table);
829err_erp_ctcam_inc:
830 kfree(objp: erp);
831 return ERR_PTR(error: err);
832}
833
834static void
835mlxsw_sp_acl_erp_ctcam_mask_destroy(struct mlxsw_sp_acl_erp *erp)
836{
837 struct mlxsw_sp_acl_erp_table *erp_table = erp->erp_table;
838
839 mlxsw_sp_acl_erp_region_ctcam_disable(erp_table);
840 mlxsw_sp_acl_erp_master_mask_clear(erp_table, key: &erp->key);
841 mlxsw_sp_acl_erp_ctcam_dec(erp_table);
842 kfree(objp: erp);
843}
844
845static struct mlxsw_sp_acl_erp *
846mlxsw_sp_acl_erp_mask_create(struct mlxsw_sp_acl_erp_table *erp_table,
847 struct mlxsw_sp_acl_erp_key *key)
848{
849 struct mlxsw_sp_acl_erp *erp;
850 int err;
851
852 if (key->ctcam)
853 return mlxsw_sp_acl_erp_ctcam_mask_create(erp_table, key);
854
855 /* Expand the eRP table for the new eRP, if needed */
856 err = mlxsw_sp_acl_erp_table_expand(erp_table);
857 if (err)
858 return ERR_PTR(error: err);
859
860 erp = mlxsw_sp_acl_erp_generic_create(erp_table, key);
861 if (IS_ERR(ptr: erp))
862 return erp;
863
864 err = mlxsw_sp_acl_erp_index_get(erp_table, p_index: &erp->index);
865 if (err)
866 goto err_erp_index_get;
867
868 err = mlxsw_sp_acl_erp_table_erp_add(erp_table, erp);
869 if (err)
870 goto err_table_erp_add;
871
872 err = mlxsw_sp_acl_erp_region_erp_add(erp_table, erp);
873 if (err)
874 goto err_region_erp_add;
875
876 erp_table->ops = &erp_multiple_masks_ops;
877
878 return erp;
879
880err_region_erp_add:
881 mlxsw_sp_acl_erp_table_erp_del(erp);
882err_table_erp_add:
883 mlxsw_sp_acl_erp_index_put(erp_table, index: erp->index);
884err_erp_index_get:
885 mlxsw_sp_acl_erp_generic_destroy(erp);
886 return ERR_PTR(error: err);
887}
888
889static void
890mlxsw_sp_acl_erp_mask_destroy(struct mlxsw_sp_acl_erp_table *erp_table,
891 struct mlxsw_sp_acl_erp *erp)
892{
893 if (erp->key.ctcam)
894 return mlxsw_sp_acl_erp_ctcam_mask_destroy(erp);
895
896 mlxsw_sp_acl_erp_region_erp_del(erp);
897 mlxsw_sp_acl_erp_table_erp_del(erp);
898 mlxsw_sp_acl_erp_index_put(erp_table, index: erp->index);
899 mlxsw_sp_acl_erp_generic_destroy(erp);
900
901 if (erp_table->num_atcam_erps == 2 && erp_table->num_ctcam_erps == 0 &&
902 erp_table->num_deltas == 0)
903 erp_table->ops = &erp_two_masks_ops;
904}
905
906static struct mlxsw_sp_acl_erp *
907mlxsw_sp_acl_erp_second_mask_create(struct mlxsw_sp_acl_erp_table *erp_table,
908 struct mlxsw_sp_acl_erp_key *key)
909{
910 struct mlxsw_sp_acl_erp *erp;
911 int err;
912
913 if (key->ctcam)
914 return mlxsw_sp_acl_erp_ctcam_mask_create(erp_table, key);
915
916 /* Transition to use eRP table instead of master mask */
917 err = mlxsw_sp_acl_erp_region_table_trans(erp_table);
918 if (err)
919 return ERR_PTR(error: err);
920
921 erp = mlxsw_sp_acl_erp_generic_create(erp_table, key);
922 if (IS_ERR(ptr: erp)) {
923 err = PTR_ERR(ptr: erp);
924 goto err_erp_create;
925 }
926
927 err = mlxsw_sp_acl_erp_index_get(erp_table, p_index: &erp->index);
928 if (err)
929 goto err_erp_index_get;
930
931 err = mlxsw_sp_acl_erp_table_erp_add(erp_table, erp);
932 if (err)
933 goto err_table_erp_add;
934
935 err = mlxsw_sp_acl_erp_region_erp_add(erp_table, erp);
936 if (err)
937 goto err_region_erp_add;
938
939 erp_table->ops = &erp_two_masks_ops;
940
941 return erp;
942
943err_region_erp_add:
944 mlxsw_sp_acl_erp_table_erp_del(erp);
945err_table_erp_add:
946 mlxsw_sp_acl_erp_index_put(erp_table, index: erp->index);
947err_erp_index_get:
948 mlxsw_sp_acl_erp_generic_destroy(erp);
949err_erp_create:
950 mlxsw_sp_acl_erp_region_master_mask_trans(erp_table);
951 return ERR_PTR(error: err);
952}
953
954static void
955mlxsw_sp_acl_erp_second_mask_destroy(struct mlxsw_sp_acl_erp_table *erp_table,
956 struct mlxsw_sp_acl_erp *erp)
957{
958 if (erp->key.ctcam)
959 return mlxsw_sp_acl_erp_ctcam_mask_destroy(erp);
960
961 mlxsw_sp_acl_erp_region_erp_del(erp);
962 mlxsw_sp_acl_erp_table_erp_del(erp);
963 mlxsw_sp_acl_erp_index_put(erp_table, index: erp->index);
964 mlxsw_sp_acl_erp_generic_destroy(erp);
965 /* Transition to use master mask instead of eRP table */
966 mlxsw_sp_acl_erp_region_master_mask_trans(erp_table);
967
968 erp_table->ops = &erp_single_mask_ops;
969}
970
971static struct mlxsw_sp_acl_erp *
972mlxsw_sp_acl_erp_first_mask_create(struct mlxsw_sp_acl_erp_table *erp_table,
973 struct mlxsw_sp_acl_erp_key *key)
974{
975 struct mlxsw_sp_acl_erp *erp;
976
977 if (key->ctcam)
978 return ERR_PTR(error: -EINVAL);
979
980 erp = mlxsw_sp_acl_erp_generic_create(erp_table, key);
981 if (IS_ERR(ptr: erp))
982 return erp;
983
984 erp_table->ops = &erp_single_mask_ops;
985
986 return erp;
987}
988
989static void
990mlxsw_sp_acl_erp_first_mask_destroy(struct mlxsw_sp_acl_erp_table *erp_table,
991 struct mlxsw_sp_acl_erp *erp)
992{
993 mlxsw_sp_acl_erp_generic_destroy(erp);
994 erp_table->ops = &erp_no_mask_ops;
995}
996
997static void
998mlxsw_sp_acl_erp_no_mask_destroy(struct mlxsw_sp_acl_erp_table *erp_table,
999 struct mlxsw_sp_acl_erp *erp)
1000{
1001 WARN_ON(1);
1002}
1003
1004struct mlxsw_sp_acl_erp_mask *
1005mlxsw_sp_acl_erp_mask_get(struct mlxsw_sp_acl_atcam_region *aregion,
1006 const char *mask, bool ctcam)
1007{
1008 struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table;
1009 struct mlxsw_sp_acl_erp_key key;
1010 struct objagg_obj *objagg_obj;
1011
1012 memcpy(key.mask, mask, MLXSW_REG_PTCEX_FLEX_KEY_BLOCKS_LEN);
1013 key.ctcam = ctcam;
1014 mutex_lock(&erp_table->objagg_lock);
1015 objagg_obj = objagg_obj_get(objagg: erp_table->objagg, obj: &key);
1016 mutex_unlock(lock: &erp_table->objagg_lock);
1017 if (IS_ERR(ptr: objagg_obj))
1018 return ERR_CAST(ptr: objagg_obj);
1019 return (struct mlxsw_sp_acl_erp_mask *) objagg_obj;
1020}
1021
1022void mlxsw_sp_acl_erp_mask_put(struct mlxsw_sp_acl_atcam_region *aregion,
1023 struct mlxsw_sp_acl_erp_mask *erp_mask)
1024{
1025 struct objagg_obj *objagg_obj = (struct objagg_obj *) erp_mask;
1026 struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table;
1027
1028 mutex_lock(&erp_table->objagg_lock);
1029 objagg_obj_put(objagg: erp_table->objagg, objagg_obj);
1030 mutex_unlock(lock: &erp_table->objagg_lock);
1031}
1032
1033int mlxsw_sp_acl_erp_bf_insert(struct mlxsw_sp *mlxsw_sp,
1034 struct mlxsw_sp_acl_atcam_region *aregion,
1035 struct mlxsw_sp_acl_erp_mask *erp_mask,
1036 struct mlxsw_sp_acl_atcam_entry *aentry)
1037{
1038 struct objagg_obj *objagg_obj = (struct objagg_obj *) erp_mask;
1039 const struct mlxsw_sp_acl_erp *erp = objagg_obj_root_priv(objagg_obj);
1040 unsigned int erp_bank;
1041
1042 if (!mlxsw_sp_acl_erp_table_is_used(erp_table: erp->erp_table))
1043 return 0;
1044
1045 erp_bank = mlxsw_sp_acl_erp_bank_get(erp);
1046 return mlxsw_sp_acl_bf_entry_add(mlxsw_sp,
1047 bf: erp->erp_table->erp_core->bf,
1048 aregion, erp_bank, aentry);
1049}
1050
1051void mlxsw_sp_acl_erp_bf_remove(struct mlxsw_sp *mlxsw_sp,
1052 struct mlxsw_sp_acl_atcam_region *aregion,
1053 struct mlxsw_sp_acl_erp_mask *erp_mask,
1054 struct mlxsw_sp_acl_atcam_entry *aentry)
1055{
1056 struct objagg_obj *objagg_obj = (struct objagg_obj *) erp_mask;
1057 const struct mlxsw_sp_acl_erp *erp = objagg_obj_root_priv(objagg_obj);
1058 unsigned int erp_bank;
1059
1060 if (!mlxsw_sp_acl_erp_table_is_used(erp_table: erp->erp_table))
1061 return;
1062
1063 erp_bank = mlxsw_sp_acl_erp_bank_get(erp);
1064 mlxsw_sp_acl_bf_entry_del(mlxsw_sp,
1065 bf: erp->erp_table->erp_core->bf,
1066 aregion, erp_bank, aentry);
1067}
1068
1069bool
1070mlxsw_sp_acl_erp_mask_is_ctcam(const struct mlxsw_sp_acl_erp_mask *erp_mask)
1071{
1072 struct objagg_obj *objagg_obj = (struct objagg_obj *) erp_mask;
1073 const struct mlxsw_sp_acl_erp_key *key = objagg_obj_raw(objagg_obj);
1074
1075 return key->ctcam;
1076}
1077
1078u8 mlxsw_sp_acl_erp_mask_erp_id(const struct mlxsw_sp_acl_erp_mask *erp_mask)
1079{
1080 struct objagg_obj *objagg_obj = (struct objagg_obj *) erp_mask;
1081 const struct mlxsw_sp_acl_erp *erp = objagg_obj_root_priv(objagg_obj);
1082
1083 return erp->id;
1084}
1085
1086struct mlxsw_sp_acl_erp_delta {
1087 struct mlxsw_sp_acl_erp_key key;
1088 u16 start;
1089 u8 mask;
1090};
1091
1092u16 mlxsw_sp_acl_erp_delta_start(const struct mlxsw_sp_acl_erp_delta *delta)
1093{
1094 return delta->start;
1095}
1096
1097u8 mlxsw_sp_acl_erp_delta_mask(const struct mlxsw_sp_acl_erp_delta *delta)
1098{
1099 return delta->mask;
1100}
1101
1102u8 mlxsw_sp_acl_erp_delta_value(const struct mlxsw_sp_acl_erp_delta *delta,
1103 const char *enc_key)
1104{
1105 u16 start = delta->start;
1106 u8 mask = delta->mask;
1107 u16 tmp;
1108
1109 if (!mask)
1110 return 0;
1111
1112 tmp = (unsigned char) enc_key[__MASK_IDX(start / 8)];
1113 if (start / 8 + 1 < __MASK_LEN)
1114 tmp |= (unsigned char) enc_key[__MASK_IDX(start / 8 + 1)] << 8;
1115 tmp >>= start % 8;
1116 tmp &= mask;
1117 return tmp;
1118}
1119
1120void mlxsw_sp_acl_erp_delta_clear(const struct mlxsw_sp_acl_erp_delta *delta,
1121 const char *enc_key)
1122{
1123 u16 start = delta->start;
1124 u8 mask = delta->mask;
1125 unsigned char *byte;
1126 u16 tmp;
1127
1128 tmp = mask;
1129 tmp <<= start % 8;
1130 tmp = ~tmp;
1131
1132 byte = (unsigned char *) &enc_key[__MASK_IDX(start / 8)];
1133 *byte &= tmp & 0xff;
1134 if (start / 8 + 1 < __MASK_LEN) {
1135 byte = (unsigned char *) &enc_key[__MASK_IDX(start / 8 + 1)];
1136 *byte &= (tmp >> 8) & 0xff;
1137 }
1138}
1139
1140static const struct mlxsw_sp_acl_erp_delta
1141mlxsw_sp_acl_erp_delta_default = {};
1142
1143const struct mlxsw_sp_acl_erp_delta *
1144mlxsw_sp_acl_erp_delta(const struct mlxsw_sp_acl_erp_mask *erp_mask)
1145{
1146 struct objagg_obj *objagg_obj = (struct objagg_obj *) erp_mask;
1147 const struct mlxsw_sp_acl_erp_delta *delta;
1148
1149 delta = objagg_obj_delta_priv(objagg_obj);
1150 if (!delta)
1151 delta = &mlxsw_sp_acl_erp_delta_default;
1152 return delta;
1153}
1154
1155static int
1156mlxsw_sp_acl_erp_delta_fill(const struct mlxsw_sp_acl_erp_key *parent_key,
1157 const struct mlxsw_sp_acl_erp_key *key,
1158 u16 *delta_start, u8 *delta_mask)
1159{
1160 int offset = 0;
1161 int si = -1;
1162 u16 pmask;
1163 u16 mask;
1164 int i;
1165
1166 /* The difference between 2 masks can be up to 8 consecutive bits. */
1167 for (i = 0; i < __MASK_LEN; i++) {
1168 if (parent_key->mask[__MASK_IDX(i)] == key->mask[__MASK_IDX(i)])
1169 continue;
1170 if (si == -1)
1171 si = i;
1172 else if (si != i - 1)
1173 return -EINVAL;
1174 }
1175 if (si == -1) {
1176 /* The masks are the same, this can happen in case eRPs with
1177 * the same mask were created in both A-TCAM and C-TCAM.
1178 * The only possible condition under which this can happen
1179 * is identical rule insertion. Delta is not possible here.
1180 */
1181 return -EINVAL;
1182 }
1183 pmask = (unsigned char) parent_key->mask[__MASK_IDX(si)];
1184 mask = (unsigned char) key->mask[__MASK_IDX(si)];
1185 if (si + 1 < __MASK_LEN) {
1186 pmask |= (unsigned char) parent_key->mask[__MASK_IDX(si + 1)] << 8;
1187 mask |= (unsigned char) key->mask[__MASK_IDX(si + 1)] << 8;
1188 }
1189
1190 if ((pmask ^ mask) & pmask)
1191 return -EINVAL;
1192 mask &= ~pmask;
1193 while (!(mask & (1 << offset)))
1194 offset++;
1195 while (!(mask & 1))
1196 mask >>= 1;
1197 if (mask & 0xff00)
1198 return -EINVAL;
1199
1200 *delta_start = si * 8 + offset;
1201 *delta_mask = mask;
1202
1203 return 0;
1204}
1205
1206static bool mlxsw_sp_acl_erp_delta_check(void *priv, const void *parent_obj,
1207 const void *obj)
1208{
1209 const struct mlxsw_sp_acl_erp_key *parent_key = parent_obj;
1210 const struct mlxsw_sp_acl_erp_key *key = obj;
1211 u16 delta_start;
1212 u8 delta_mask;
1213 int err;
1214
1215 err = mlxsw_sp_acl_erp_delta_fill(parent_key, key,
1216 delta_start: &delta_start, delta_mask: &delta_mask);
1217 return err ? false : true;
1218}
1219
1220static int mlxsw_sp_acl_erp_hints_obj_cmp(const void *obj1, const void *obj2)
1221{
1222 const struct mlxsw_sp_acl_erp_key *key1 = obj1;
1223 const struct mlxsw_sp_acl_erp_key *key2 = obj2;
1224
1225 /* For hints purposes, two objects are considered equal
1226 * in case the masks are the same. Does not matter what
1227 * the "ctcam" value is.
1228 */
1229 return memcmp(p: key1->mask, q: key2->mask, size: sizeof(key1->mask));
1230}
1231
1232static void *mlxsw_sp_acl_erp_delta_create(void *priv, void *parent_obj,
1233 void *obj)
1234{
1235 struct mlxsw_sp_acl_erp_key *parent_key = parent_obj;
1236 struct mlxsw_sp_acl_atcam_region *aregion = priv;
1237 struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table;
1238 struct mlxsw_sp_acl_erp_key *key = obj;
1239 struct mlxsw_sp_acl_erp_delta *delta;
1240 u16 delta_start;
1241 u8 delta_mask;
1242 int err;
1243
1244 if (parent_key->ctcam || key->ctcam)
1245 return ERR_PTR(error: -EINVAL);
1246 err = mlxsw_sp_acl_erp_delta_fill(parent_key, key,
1247 delta_start: &delta_start, delta_mask: &delta_mask);
1248 if (err)
1249 return ERR_PTR(error: -EINVAL);
1250
1251 delta = kzalloc(size: sizeof(*delta), GFP_KERNEL);
1252 if (!delta)
1253 return ERR_PTR(error: -ENOMEM);
1254 delta->start = delta_start;
1255 delta->mask = delta_mask;
1256
1257 err = mlxsw_sp_acl_erp_delta_inc(erp_table);
1258 if (err)
1259 goto err_erp_delta_inc;
1260
1261 memcpy(&delta->key, key, sizeof(*key));
1262 err = mlxsw_sp_acl_erp_master_mask_set(erp_table, key: &delta->key);
1263 if (err)
1264 goto err_master_mask_set;
1265
1266 return delta;
1267
1268err_master_mask_set:
1269 mlxsw_sp_acl_erp_delta_dec(erp_table);
1270err_erp_delta_inc:
1271 kfree(objp: delta);
1272 return ERR_PTR(error: err);
1273}
1274
1275static void mlxsw_sp_acl_erp_delta_destroy(void *priv, void *delta_priv)
1276{
1277 struct mlxsw_sp_acl_erp_delta *delta = delta_priv;
1278 struct mlxsw_sp_acl_atcam_region *aregion = priv;
1279 struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table;
1280
1281 mlxsw_sp_acl_erp_master_mask_clear(erp_table, key: &delta->key);
1282 mlxsw_sp_acl_erp_delta_dec(erp_table);
1283 kfree(objp: delta);
1284}
1285
1286static void *mlxsw_sp_acl_erp_root_create(void *priv, void *obj,
1287 unsigned int root_id)
1288{
1289 struct mlxsw_sp_acl_atcam_region *aregion = priv;
1290 struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table;
1291 struct mlxsw_sp_acl_erp_key *key = obj;
1292
1293 if (!key->ctcam &&
1294 root_id != OBJAGG_OBJ_ROOT_ID_INVALID &&
1295 root_id >= MLXSW_SP_ACL_ERP_MAX_PER_REGION)
1296 return ERR_PTR(error: -ENOBUFS);
1297 return erp_table->ops->erp_create(erp_table, key);
1298}
1299
1300static void mlxsw_sp_acl_erp_root_destroy(void *priv, void *root_priv)
1301{
1302 struct mlxsw_sp_acl_atcam_region *aregion = priv;
1303 struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table;
1304
1305 erp_table->ops->erp_destroy(erp_table, root_priv);
1306}
1307
1308static const struct objagg_ops mlxsw_sp_acl_erp_objagg_ops = {
1309 .obj_size = sizeof(struct mlxsw_sp_acl_erp_key),
1310 .delta_check = mlxsw_sp_acl_erp_delta_check,
1311 .hints_obj_cmp = mlxsw_sp_acl_erp_hints_obj_cmp,
1312 .delta_create = mlxsw_sp_acl_erp_delta_create,
1313 .delta_destroy = mlxsw_sp_acl_erp_delta_destroy,
1314 .root_create = mlxsw_sp_acl_erp_root_create,
1315 .root_destroy = mlxsw_sp_acl_erp_root_destroy,
1316};
1317
1318static struct mlxsw_sp_acl_erp_table *
1319mlxsw_sp_acl_erp_table_create(struct mlxsw_sp_acl_atcam_region *aregion,
1320 struct objagg_hints *hints)
1321{
1322 struct mlxsw_sp_acl_erp_table *erp_table;
1323 int err;
1324
1325 erp_table = kzalloc(size: sizeof(*erp_table), GFP_KERNEL);
1326 if (!erp_table)
1327 return ERR_PTR(error: -ENOMEM);
1328
1329 erp_table->objagg = objagg_create(ops: &mlxsw_sp_acl_erp_objagg_ops,
1330 hints, priv: aregion);
1331 if (IS_ERR(ptr: erp_table->objagg)) {
1332 err = PTR_ERR(ptr: erp_table->objagg);
1333 goto err_objagg_create;
1334 }
1335
1336 erp_table->erp_core = aregion->atcam->erp_core;
1337 erp_table->ops = &erp_no_mask_ops;
1338 INIT_LIST_HEAD(list: &erp_table->atcam_erps_list);
1339 erp_table->aregion = aregion;
1340 mutex_init(&erp_table->objagg_lock);
1341
1342 return erp_table;
1343
1344err_objagg_create:
1345 kfree(objp: erp_table);
1346 return ERR_PTR(error: err);
1347}
1348
1349static void
1350mlxsw_sp_acl_erp_table_destroy(struct mlxsw_sp_acl_erp_table *erp_table)
1351{
1352 WARN_ON(!list_empty(&erp_table->atcam_erps_list));
1353 mutex_destroy(lock: &erp_table->objagg_lock);
1354 objagg_destroy(objagg: erp_table->objagg);
1355 kfree(objp: erp_table);
1356}
1357
1358static int
1359mlxsw_sp_acl_erp_master_mask_init(struct mlxsw_sp_acl_atcam_region *aregion)
1360{
1361 struct mlxsw_sp *mlxsw_sp = aregion->region->mlxsw_sp;
1362 char percr_pl[MLXSW_REG_PERCR_LEN];
1363
1364 mlxsw_reg_percr_pack(payload: percr_pl, region_id: aregion->region->id);
1365 return mlxsw_reg_write(mlxsw_core: mlxsw_sp->core, MLXSW_REG(percr), payload: percr_pl);
1366}
1367
1368static int
1369mlxsw_sp_acl_erp_region_param_init(struct mlxsw_sp_acl_atcam_region *aregion)
1370{
1371 struct mlxsw_sp *mlxsw_sp = aregion->region->mlxsw_sp;
1372 char pererp_pl[MLXSW_REG_PERERP_LEN];
1373
1374 mlxsw_reg_pererp_pack(payload: pererp_pl, region_id: aregion->region->id, ctcam_le: false, erpt_pointer_valid: false, erpt_bank_pointer: 0,
1375 erpt_pointer: 0, master_rp_id: 0);
1376 return mlxsw_reg_write(mlxsw_core: mlxsw_sp->core, MLXSW_REG(pererp), payload: pererp_pl);
1377}
1378
1379static int
1380mlxsw_sp_acl_erp_hints_check(struct mlxsw_sp *mlxsw_sp,
1381 struct mlxsw_sp_acl_atcam_region *aregion,
1382 struct objagg_hints *hints, bool *p_rehash_needed)
1383{
1384 struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table;
1385 const struct objagg_stats *ostats;
1386 const struct objagg_stats *hstats;
1387 int err;
1388
1389 *p_rehash_needed = false;
1390
1391 mutex_lock(&erp_table->objagg_lock);
1392 ostats = objagg_stats_get(objagg: erp_table->objagg);
1393 mutex_unlock(lock: &erp_table->objagg_lock);
1394 if (IS_ERR(ptr: ostats)) {
1395 dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Failed to get ERP stats\n");
1396 return PTR_ERR(ptr: ostats);
1397 }
1398
1399 hstats = objagg_hints_stats_get(objagg_hints: hints);
1400 if (IS_ERR(ptr: hstats)) {
1401 dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Failed to get ERP hints stats\n");
1402 err = PTR_ERR(ptr: hstats);
1403 goto err_hints_stats_get;
1404 }
1405
1406 /* Very basic criterion for now. */
1407 if (hstats->root_count < ostats->root_count)
1408 *p_rehash_needed = true;
1409
1410 err = 0;
1411
1412 objagg_stats_put(objagg_stats: hstats);
1413err_hints_stats_get:
1414 objagg_stats_put(objagg_stats: ostats);
1415 return err;
1416}
1417
1418void *
1419mlxsw_sp_acl_erp_rehash_hints_get(struct mlxsw_sp_acl_atcam_region *aregion)
1420{
1421 struct mlxsw_sp_acl_erp_table *erp_table = aregion->erp_table;
1422 struct mlxsw_sp *mlxsw_sp = aregion->region->mlxsw_sp;
1423 struct objagg_hints *hints;
1424 bool rehash_needed;
1425 int err;
1426
1427 mutex_lock(&erp_table->objagg_lock);
1428 hints = objagg_hints_get(objagg: erp_table->objagg,
1429 opt_algo_type: OBJAGG_OPT_ALGO_SIMPLE_GREEDY);
1430 mutex_unlock(lock: &erp_table->objagg_lock);
1431 if (IS_ERR(ptr: hints)) {
1432 dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Failed to create ERP hints\n");
1433 return ERR_CAST(ptr: hints);
1434 }
1435 err = mlxsw_sp_acl_erp_hints_check(mlxsw_sp, aregion, hints,
1436 p_rehash_needed: &rehash_needed);
1437 if (err)
1438 goto errout;
1439
1440 if (!rehash_needed) {
1441 err = -EAGAIN;
1442 goto errout;
1443 }
1444 return hints;
1445
1446errout:
1447 objagg_hints_put(objagg_hints: hints);
1448 return ERR_PTR(error: err);
1449}
1450
1451void mlxsw_sp_acl_erp_rehash_hints_put(void *hints_priv)
1452{
1453 struct objagg_hints *hints = hints_priv;
1454
1455 objagg_hints_put(objagg_hints: hints);
1456}
1457
1458int mlxsw_sp_acl_erp_region_init(struct mlxsw_sp_acl_atcam_region *aregion,
1459 void *hints_priv)
1460{
1461 struct mlxsw_sp_acl_erp_table *erp_table;
1462 struct objagg_hints *hints = hints_priv;
1463 int err;
1464
1465 erp_table = mlxsw_sp_acl_erp_table_create(aregion, hints);
1466 if (IS_ERR(ptr: erp_table))
1467 return PTR_ERR(ptr: erp_table);
1468 aregion->erp_table = erp_table;
1469
1470 /* Initialize the region's master mask to all zeroes */
1471 err = mlxsw_sp_acl_erp_master_mask_init(aregion);
1472 if (err)
1473 goto err_erp_master_mask_init;
1474
1475 /* Initialize the region to not use the eRP table */
1476 err = mlxsw_sp_acl_erp_region_param_init(aregion);
1477 if (err)
1478 goto err_erp_region_param_init;
1479
1480 return 0;
1481
1482err_erp_region_param_init:
1483err_erp_master_mask_init:
1484 mlxsw_sp_acl_erp_table_destroy(erp_table);
1485 return err;
1486}
1487
1488void mlxsw_sp_acl_erp_region_fini(struct mlxsw_sp_acl_atcam_region *aregion)
1489{
1490 mlxsw_sp_acl_erp_table_destroy(erp_table: aregion->erp_table);
1491}
1492
1493static int
1494mlxsw_sp_acl_erp_tables_sizes_query(struct mlxsw_sp *mlxsw_sp,
1495 struct mlxsw_sp_acl_erp_core *erp_core)
1496{
1497 unsigned int size;
1498
1499 if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, ACL_ERPT_ENTRIES_2KB) ||
1500 !MLXSW_CORE_RES_VALID(mlxsw_sp->core, ACL_ERPT_ENTRIES_4KB) ||
1501 !MLXSW_CORE_RES_VALID(mlxsw_sp->core, ACL_ERPT_ENTRIES_8KB) ||
1502 !MLXSW_CORE_RES_VALID(mlxsw_sp->core, ACL_ERPT_ENTRIES_12KB))
1503 return -EIO;
1504
1505 size = MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_ERPT_ENTRIES_2KB);
1506 erp_core->erpt_entries_size[MLXSW_SP_ACL_ATCAM_REGION_TYPE_2KB] = size;
1507
1508 size = MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_ERPT_ENTRIES_4KB);
1509 erp_core->erpt_entries_size[MLXSW_SP_ACL_ATCAM_REGION_TYPE_4KB] = size;
1510
1511 size = MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_ERPT_ENTRIES_8KB);
1512 erp_core->erpt_entries_size[MLXSW_SP_ACL_ATCAM_REGION_TYPE_8KB] = size;
1513
1514 size = MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_ERPT_ENTRIES_12KB);
1515 erp_core->erpt_entries_size[MLXSW_SP_ACL_ATCAM_REGION_TYPE_12KB] = size;
1516
1517 return 0;
1518}
1519
1520static int mlxsw_sp_acl_erp_tables_init(struct mlxsw_sp *mlxsw_sp,
1521 struct mlxsw_sp_acl_erp_core *erp_core)
1522{
1523 unsigned int erpt_bank_size;
1524 int err;
1525
1526 if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, ACL_MAX_ERPT_BANK_SIZE) ||
1527 !MLXSW_CORE_RES_VALID(mlxsw_sp->core, ACL_MAX_ERPT_BANKS))
1528 return -EIO;
1529 erpt_bank_size = MLXSW_CORE_RES_GET(mlxsw_sp->core,
1530 ACL_MAX_ERPT_BANK_SIZE);
1531 erp_core->num_erp_banks = MLXSW_CORE_RES_GET(mlxsw_sp->core,
1532 ACL_MAX_ERPT_BANKS);
1533
1534 erp_core->erp_tables = gen_pool_create(0, -1);
1535 if (!erp_core->erp_tables)
1536 return -ENOMEM;
1537 gen_pool_set_algo(pool: erp_core->erp_tables, algo: gen_pool_best_fit, NULL);
1538
1539 err = gen_pool_add(pool: erp_core->erp_tables,
1540 MLXSW_SP_ACL_ERP_GENALLOC_OFFSET, size: erpt_bank_size,
1541 nid: -1);
1542 if (err)
1543 goto err_gen_pool_add;
1544
1545 erp_core->bf = mlxsw_sp_acl_bf_init(mlxsw_sp, num_erp_banks: erp_core->num_erp_banks);
1546 if (IS_ERR(ptr: erp_core->bf)) {
1547 err = PTR_ERR(ptr: erp_core->bf);
1548 goto err_bf_init;
1549 }
1550
1551 /* Different regions require masks of different sizes */
1552 err = mlxsw_sp_acl_erp_tables_sizes_query(mlxsw_sp, erp_core);
1553 if (err)
1554 goto err_erp_tables_sizes_query;
1555
1556 return 0;
1557
1558err_erp_tables_sizes_query:
1559 mlxsw_sp_acl_bf_fini(bf: erp_core->bf);
1560err_bf_init:
1561err_gen_pool_add:
1562 gen_pool_destroy(erp_core->erp_tables);
1563 return err;
1564}
1565
1566static void mlxsw_sp_acl_erp_tables_fini(struct mlxsw_sp *mlxsw_sp,
1567 struct mlxsw_sp_acl_erp_core *erp_core)
1568{
1569 mlxsw_sp_acl_bf_fini(bf: erp_core->bf);
1570 gen_pool_destroy(erp_core->erp_tables);
1571}
1572
1573int mlxsw_sp_acl_erps_init(struct mlxsw_sp *mlxsw_sp,
1574 struct mlxsw_sp_acl_atcam *atcam)
1575{
1576 struct mlxsw_sp_acl_erp_core *erp_core;
1577 int err;
1578
1579 erp_core = kzalloc(size: sizeof(*erp_core), GFP_KERNEL);
1580 if (!erp_core)
1581 return -ENOMEM;
1582 erp_core->mlxsw_sp = mlxsw_sp;
1583 atcam->erp_core = erp_core;
1584
1585 err = mlxsw_sp_acl_erp_tables_init(mlxsw_sp, erp_core);
1586 if (err)
1587 goto err_erp_tables_init;
1588
1589 return 0;
1590
1591err_erp_tables_init:
1592 kfree(objp: erp_core);
1593 return err;
1594}
1595
1596void mlxsw_sp_acl_erps_fini(struct mlxsw_sp *mlxsw_sp,
1597 struct mlxsw_sp_acl_atcam *atcam)
1598{
1599 mlxsw_sp_acl_erp_tables_fini(mlxsw_sp, erp_core: atcam->erp_core);
1600 kfree(objp: atcam->erp_core);
1601}
1602

source code of linux/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_erp.c