1/* SPDX-License-Identifier: GPL-2.0+ */
2/* Copyright (C) 2022 Microchip Technology Inc. and its subsidiaries.
3 * Microchip VCAP API
4 */
5
6#ifndef __VCAP_API_PRIVATE__
7#define __VCAP_API_PRIVATE__
8
9#include <linux/types.h>
10
11#include "vcap_api.h"
12#include "vcap_api_client.h"
13
14#define to_intrule(rule) container_of((rule), struct vcap_rule_internal, data)
15
16enum vcap_rule_state {
17 VCAP_RS_PERMANENT, /* the rule is always stored in HW */
18 VCAP_RS_ENABLED, /* enabled in HW but can be disabled */
19 VCAP_RS_DISABLED, /* disabled (stored in SW) and can be enabled */
20};
21
22/* Private VCAP API rule data */
23struct vcap_rule_internal {
24 struct vcap_rule data; /* provided by the client */
25 struct list_head list; /* the vcap admin list of rules */
26 struct vcap_admin *admin; /* vcap hw instance */
27 struct net_device *ndev; /* the interface that the rule applies to */
28 struct vcap_control *vctrl; /* the client control */
29 u32 sort_key; /* defines the position in the VCAP */
30 int keyset_sw; /* subwords in a keyset */
31 int actionset_sw; /* subwords in an actionset */
32 int keyset_sw_regs; /* registers in a subword in an keyset */
33 int actionset_sw_regs; /* registers in a subword in an actionset */
34 int size; /* the size of the rule: max(entry, action) */
35 u32 addr; /* address in the VCAP at insertion */
36 u32 counter_id; /* counter id (if a dedicated counter is available) */
37 struct vcap_counter counter; /* last read counter value */
38 enum vcap_rule_state state; /* rule storage state */
39};
40
41/* Bit iterator for the VCAP cache streams */
42struct vcap_stream_iter {
43 u32 offset; /* bit offset from the stream start */
44 u32 sw_width; /* subword width in bits */
45 u32 regs_per_sw; /* registers per subword */
46 u32 reg_idx; /* current register index */
47 u32 reg_bitpos; /* bit offset in current register */
48 const struct vcap_typegroup *tg; /* current typegroup */
49};
50
51/* Check that the control has a valid set of callbacks */
52int vcap_api_check(struct vcap_control *ctrl);
53/* Erase the VCAP cache area used or encoding and decoding */
54void vcap_erase_cache(struct vcap_rule_internal *ri);
55
56/* Iterator functionality */
57
58void vcap_iter_init(struct vcap_stream_iter *itr, int sw_width,
59 const struct vcap_typegroup *tg, u32 offset);
60void vcap_iter_next(struct vcap_stream_iter *itr);
61void vcap_iter_set(struct vcap_stream_iter *itr, int sw_width,
62 const struct vcap_typegroup *tg, u32 offset);
63void vcap_iter_update(struct vcap_stream_iter *itr);
64
65/* Keyset and keyfield functionality */
66
67/* Return the number of keyfields in the keyset */
68int vcap_keyfield_count(struct vcap_control *vctrl,
69 enum vcap_type vt, enum vcap_keyfield_set keyset);
70/* Return the typegroup table for the matching keyset (using subword size) */
71const struct vcap_typegroup *
72vcap_keyfield_typegroup(struct vcap_control *vctrl,
73 enum vcap_type vt, enum vcap_keyfield_set keyset);
74/* Return the list of keyfields for the keyset */
75const struct vcap_field *vcap_keyfields(struct vcap_control *vctrl,
76 enum vcap_type vt,
77 enum vcap_keyfield_set keyset);
78
79/* Actionset and actionfield functionality */
80
81/* Return the actionset information for the actionset */
82const struct vcap_set *
83vcap_actionfieldset(struct vcap_control *vctrl,
84 enum vcap_type vt, enum vcap_actionfield_set actionset);
85/* Return the number of actionfields in the actionset */
86int vcap_actionfield_count(struct vcap_control *vctrl,
87 enum vcap_type vt,
88 enum vcap_actionfield_set actionset);
89/* Return the typegroup table for the matching actionset (using subword size) */
90const struct vcap_typegroup *
91vcap_actionfield_typegroup(struct vcap_control *vctrl, enum vcap_type vt,
92 enum vcap_actionfield_set actionset);
93/* Return the list of actionfields for the actionset */
94const struct vcap_field *
95vcap_actionfields(struct vcap_control *vctrl,
96 enum vcap_type vt, enum vcap_actionfield_set actionset);
97/* Map actionset id to a string with the actionset name */
98const char *vcap_actionset_name(struct vcap_control *vctrl,
99 enum vcap_actionfield_set actionset);
100/* Map key field id to a string with the key name */
101const char *vcap_actionfield_name(struct vcap_control *vctrl,
102 enum vcap_action_field action);
103
104/* Read key data from a VCAP address and discover if there are any rule keysets
105 * here
106 */
107int vcap_addr_keysets(struct vcap_control *vctrl, struct net_device *ndev,
108 struct vcap_admin *admin, int addr,
109 struct vcap_keyset_list *kslist);
110
111/* Verify that the typegroup information, subword count, keyset and type id
112 * are in sync and correct, return the list of matchin keysets
113 */
114int vcap_find_keystream_keysets(struct vcap_control *vctrl, enum vcap_type vt,
115 u32 *keystream, u32 *mskstream, bool mask,
116 int sw_max, struct vcap_keyset_list *kslist);
117
118/* Get the keysets that matches the rule key type/mask */
119int vcap_rule_get_keysets(struct vcap_rule_internal *ri,
120 struct vcap_keyset_list *matches);
121/* Decode a rule from the VCAP cache and return a copy */
122struct vcap_rule *vcap_decode_rule(struct vcap_rule_internal *elem);
123
124#endif /* __VCAP_API_PRIVATE__ */
125

source code of linux/drivers/net/ethernet/microchip/vcap/vcap_api_private.h