spectrum_acl_ctcam.c

  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/errno.h>
  6#include <linux/parman.h>
  7
  8#include "reg.h"
  9#include "core.h"
 10#include "spectrum.h"
 11#include "spectrum_acl_tcam.h"
 12
 13static int
 14mlxsw_sp_acl_ctcam_region_resize(struct mlxsw_sp *mlxsw_sp,
 15				 struct mlxsw_sp_acl_tcam_region *region,
 16				 u16 new_size)
 17{
 18	char ptar_pl[MLXSW_REG_PTAR_LEN];
 19
 20	mlxsw_reg_ptar_pack(ptar_pl, MLXSW_REG_PTAR_OP_RESIZE,
 21			    region->key_type, new_size, region->id,
 22			    region->tcam_region_info);
 23	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptar), ptar_pl);
 24}
 25
 26static void
 27mlxsw_sp_acl_ctcam_region_move(struct mlxsw_sp *mlxsw_sp,
 28			       struct mlxsw_sp_acl_tcam_region *region,
 29			       u16 src_offset, u16 dst_offset, u16 size)
 30{
 31	char prcr_pl[MLXSW_REG_PRCR_LEN];
 32
 33	mlxsw_reg_prcr_pack(prcr_pl, MLXSW_REG_PRCR_OP_MOVE,
 34			    region->tcam_region_info, src_offset,
 35			    region->tcam_region_info, dst_offset, size);
 36	mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(prcr), prcr_pl);
 37}
 38
 39static int
 40mlxsw_sp_acl_ctcam_region_entry_insert(struct mlxsw_sp *mlxsw_sp,
 41				       struct mlxsw_sp_acl_ctcam_region *cregion,
 42				       struct mlxsw_sp_acl_ctcam_entry *centry,
 43				       struct mlxsw_sp_acl_rule_info *rulei,
 44				       bool fillup_priority)
 45{
 46	struct mlxsw_sp_acl_tcam_region *region = cregion->region;
 47	struct mlxsw_afk *afk = mlxsw_sp_acl_afk(mlxsw_sp->acl);
 48	char ptce2_pl[MLXSW_REG_PTCE2_LEN];
 49	char *act_set;
 50	u32 priority;
 51	char *mask;
 52	char *key;
 53	int err;
 54
 55	err = mlxsw_sp_acl_tcam_priority_get(mlxsw_sp, rulei, &priority,
 56					     fillup_priority);
 57	if (err)
 58		return err;
 59
 60	mlxsw_reg_ptce2_pack(ptce2_pl, true, MLXSW_REG_PTCE2_OP_WRITE_WRITE,
 61			     region->tcam_region_info,
 62			     centry->parman_item.index, priority);
 63	key = mlxsw_reg_ptce2_flex_key_blocks_data(ptce2_pl);
 64	mask = mlxsw_reg_ptce2_mask_data(ptce2_pl);
 65	mlxsw_afk_encode(afk, region->key_info, &rulei->values, key, mask);
 66
 67	err = cregion->ops->entry_insert(cregion, centry, mask);
 68	if (err)
 69		return err;
 70
 71	/* Only the first action set belongs here, the rest is in KVD */
 72	act_set = mlxsw_afa_block_first_set(rulei->act_block);
 73	mlxsw_reg_ptce2_flex_action_set_memcpy_to(ptce2_pl, act_set);
 74
 75	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptce2), ptce2_pl);
 76	if (err)
 77		goto err_ptce2_write;
 78
 79	return 0;
 80
 81err_ptce2_write:
 82	cregion->ops->entry_remove(cregion, centry);
 83	return err;
 84}
 85
 86static void
 87mlxsw_sp_acl_ctcam_region_entry_remove(struct mlxsw_sp *mlxsw_sp,
 88				       struct mlxsw_sp_acl_ctcam_region *cregion,
 89				       struct mlxsw_sp_acl_ctcam_entry *centry)
 90{
 91	char ptce2_pl[MLXSW_REG_PTCE2_LEN];
 92
 93	mlxsw_reg_ptce2_pack(ptce2_pl, false, MLXSW_REG_PTCE2_OP_WRITE_WRITE,
 94			     cregion->region->tcam_region_info,
 95			     centry->parman_item.index, 0);
 96	mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptce2), ptce2_pl);
 97	cregion->ops->entry_remove(cregion, centry);
 98}
 99
100static int
101mlxsw_sp_acl_ctcam_region_entry_action_replace(struct mlxsw_sp *mlxsw_sp,
102					       struct mlxsw_sp_acl_ctcam_region *cregion,
103					       struct mlxsw_sp_acl_ctcam_entry *centry,
104					       struct mlxsw_afa_block *afa_block,
105					       unsigned int priority)
106{
107	char ptce2_pl[MLXSW_REG_PTCE2_LEN];
108	char *act_set;
109
110	mlxsw_reg_ptce2_pack(ptce2_pl, true, MLXSW_REG_PTCE2_OP_WRITE_UPDATE,
111			     cregion->region->tcam_region_info,
112			     centry->parman_item.index, priority);
113
114	act_set = mlxsw_afa_block_first_set(afa_block);
115	mlxsw_reg_ptce2_flex_action_set_memcpy_to(ptce2_pl, act_set);
116
117	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptce2), ptce2_pl);
118}
119
120
121static int mlxsw_sp_acl_ctcam_region_parman_resize(void *priv,
122						   unsigned long new_count)
123{
124	struct mlxsw_sp_acl_ctcam_region *cregion = priv;
125	struct mlxsw_sp_acl_tcam_region *region = cregion->region;
126	struct mlxsw_sp *mlxsw_sp = region->mlxsw_sp;
127	u64 max_tcam_rules;
128
129	max_tcam_rules = MLXSW_CORE_RES_GET(mlxsw_sp->core, ACL_MAX_TCAM_RULES);
130	if (new_count > max_tcam_rules)
131		return -EINVAL;
132	return mlxsw_sp_acl_ctcam_region_resize(mlxsw_sp, region, new_count);
133}
134
135static void mlxsw_sp_acl_ctcam_region_parman_move(void *priv,
136						  unsigned long from_index,
137						  unsigned long to_index,
138						  unsigned long count)
139{
140	struct mlxsw_sp_acl_ctcam_region *cregion = priv;
141	struct mlxsw_sp_acl_tcam_region *region = cregion->region;
142	struct mlxsw_sp *mlxsw_sp = region->mlxsw_sp;
143
144	mlxsw_sp_acl_ctcam_region_move(mlxsw_sp, region,
145				       from_index, to_index, count);
146}
147
148static const struct parman_ops mlxsw_sp_acl_ctcam_region_parman_ops = {
149	.base_count	= MLXSW_SP_ACL_TCAM_REGION_BASE_COUNT,
150	.resize_step	= MLXSW_SP_ACL_TCAM_REGION_RESIZE_STEP,
151	.resize		= mlxsw_sp_acl_ctcam_region_parman_resize,
152	.move		= mlxsw_sp_acl_ctcam_region_parman_move,
153	.algo		= PARMAN_ALGO_TYPE_LSORT,
154};
155
156int
157mlxsw_sp_acl_ctcam_region_init(struct mlxsw_sp *mlxsw_sp,
158			       struct mlxsw_sp_acl_ctcam_region *cregion,
159			       struct mlxsw_sp_acl_tcam_region *region,
160			       const struct mlxsw_sp_acl_ctcam_region_ops *ops)
161{
162	cregion->region = region;
163	cregion->ops = ops;
164	cregion->parman = parman_create(&mlxsw_sp_acl_ctcam_region_parman_ops,
165					cregion);
166	if (!cregion->parman)
167		return -ENOMEM;
168	return 0;
169}
170
171void mlxsw_sp_acl_ctcam_region_fini(struct mlxsw_sp_acl_ctcam_region *cregion)
172{
173	parman_destroy(cregion->parman);
174}
175
176void mlxsw_sp_acl_ctcam_chunk_init(struct mlxsw_sp_acl_ctcam_region *cregion,
177				   struct mlxsw_sp_acl_ctcam_chunk *cchunk,
178				   unsigned int priority)
179{
180	parman_prio_init(cregion->parman, &cchunk->parman_prio, priority);
181}
182
183void mlxsw_sp_acl_ctcam_chunk_fini(struct mlxsw_sp_acl_ctcam_chunk *cchunk)
184{
185	parman_prio_fini(&cchunk->parman_prio);
186}
187
188int mlxsw_sp_acl_ctcam_entry_add(struct mlxsw_sp *mlxsw_sp,
189				 struct mlxsw_sp_acl_ctcam_region *cregion,
190				 struct mlxsw_sp_acl_ctcam_chunk *cchunk,
191				 struct mlxsw_sp_acl_ctcam_entry *centry,
192				 struct mlxsw_sp_acl_rule_info *rulei,
193				 bool fillup_priority)
194{
195	int err;
196
197	err = parman_item_add(cregion->parman, &cchunk->parman_prio,
198			      &centry->parman_item);
199	if (err)
200		return err;
201
202	err = mlxsw_sp_acl_ctcam_region_entry_insert(mlxsw_sp, cregion, centry,
203						     rulei, fillup_priority);
204	if (err)
205		goto err_rule_insert;
206	return 0;
207
208err_rule_insert:
209	parman_item_remove(cregion->parman, &cchunk->parman_prio,
210			   &centry->parman_item);
211	return err;
212}
213
214void mlxsw_sp_acl_ctcam_entry_del(struct mlxsw_sp *mlxsw_sp,
215				  struct mlxsw_sp_acl_ctcam_region *cregion,
216				  struct mlxsw_sp_acl_ctcam_chunk *cchunk,
217				  struct mlxsw_sp_acl_ctcam_entry *centry)
218{
219	mlxsw_sp_acl_ctcam_region_entry_remove(mlxsw_sp, cregion, centry);
220	parman_item_remove(cregion->parman, &cchunk->parman_prio,
221			   &centry->parman_item);
222}
223
224int mlxsw_sp_acl_ctcam_entry_action_replace(struct mlxsw_sp *mlxsw_sp,
225					    struct mlxsw_sp_acl_ctcam_region *cregion,
226					    struct mlxsw_sp_acl_ctcam_entry *centry,
227					    struct mlxsw_sp_acl_rule_info *rulei)
228{
229	return mlxsw_sp_acl_ctcam_region_entry_action_replace(mlxsw_sp, cregion,
230							      centry,
231							      rulei->act_block,
232							      rulei->priority);
233}