1 /*
2  * drivers/net/ethernet/mellanox/mlxsw/resources.h
3  * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
4  * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are met:
8  *
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 3. Neither the names of the copyright holders nor the names of its
15  *    contributors may be used to endorse or promote products derived from
16  *    this software without specific prior written permission.
17  *
18  * Alternatively, this software may be distributed under the terms of the
19  * GNU General Public License ("GPL") version 2 as published by the Free
20  * Software Foundation.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
23  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32  * POSSIBILITY OF SUCH DAMAGE.
33  */
34 
35 #ifndef _MLXSW_RESOURCES_H
36 #define _MLXSW_RESOURCES_H
37 
38 #include <linux/kernel.h>
39 #include <linux/types.h>
40 
41 enum mlxsw_res_id {
42 	MLXSW_RES_ID_KVD_SIZE,
43 	MLXSW_RES_ID_KVD_SINGLE_MIN_SIZE,
44 	MLXSW_RES_ID_KVD_DOUBLE_MIN_SIZE,
45 	MLXSW_RES_ID_MAX_TRAP_GROUPS,
46 	MLXSW_RES_ID_MAX_SPAN,
47 	MLXSW_RES_ID_MAX_SYSTEM_PORT,
48 	MLXSW_RES_ID_MAX_LAG,
49 	MLXSW_RES_ID_MAX_LAG_MEMBERS,
50 	MLXSW_RES_ID_MAX_BUFFER_SIZE,
51 	MLXSW_RES_ID_MAX_CPU_POLICERS,
52 	MLXSW_RES_ID_MAX_VRS,
53 	MLXSW_RES_ID_MAX_RIFS,
54 
55 	/* Internal resources.
56 	 * Determined by the SW, not queried from the HW.
57 	 */
58 	MLXSW_RES_ID_KVD_SINGLE_SIZE,
59 	MLXSW_RES_ID_KVD_DOUBLE_SIZE,
60 	MLXSW_RES_ID_KVD_LINEAR_SIZE,
61 
62 	__MLXSW_RES_ID_MAX,
63 };
64 
65 static u16 mlxsw_res_ids[] = {
66 	[MLXSW_RES_ID_KVD_SIZE] = 0x1001,
67 	[MLXSW_RES_ID_KVD_SINGLE_MIN_SIZE] = 0x1002,
68 	[MLXSW_RES_ID_KVD_DOUBLE_MIN_SIZE] = 0x1003,
69 	[MLXSW_RES_ID_MAX_TRAP_GROUPS] = 0x2201,
70 	[MLXSW_RES_ID_MAX_SPAN] = 0x2420,
71 	[MLXSW_RES_ID_MAX_SYSTEM_PORT] = 0x2502,
72 	[MLXSW_RES_ID_MAX_LAG] = 0x2520,
73 	[MLXSW_RES_ID_MAX_LAG_MEMBERS] = 0x2521,
74 	[MLXSW_RES_ID_MAX_BUFFER_SIZE] = 0x2802,	/* Bytes */
75 	[MLXSW_RES_ID_MAX_CPU_POLICERS] = 0x2A13,
76 	[MLXSW_RES_ID_MAX_VRS] = 0x2C01,
77 	[MLXSW_RES_ID_MAX_RIFS] = 0x2C02,
78 };
79 
80 struct mlxsw_res {
81 	bool valid[__MLXSW_RES_ID_MAX];
82 	u64 values[__MLXSW_RES_ID_MAX];
83 };
84 
85 static inline bool mlxsw_res_valid(struct mlxsw_res *res,
86 				   enum mlxsw_res_id res_id)
87 {
88 	return res->valid[res_id];
89 }
90 
91 #define MLXSW_RES_VALID(res, short_res_id)			\
92 	mlxsw_res_valid(res, MLXSW_RES_ID_##short_res_id)
93 
94 static inline u64 mlxsw_res_get(struct mlxsw_res *res,
95 				enum mlxsw_res_id res_id)
96 {
97 	if (WARN_ON(!res->valid[res_id]))
98 		return 0;
99 	return res->values[res_id];
100 }
101 
102 #define MLXSW_RES_GET(res, short_res_id)			\
103 	mlxsw_res_get(res, MLXSW_RES_ID_##short_res_id)
104 
105 static inline void mlxsw_res_set(struct mlxsw_res *res,
106 				 enum mlxsw_res_id res_id, u64 value)
107 {
108 	res->valid[res_id] = true;
109 	res->values[res_id] = value;
110 }
111 
112 #define MLXSW_RES_SET(res, short_res_id, value)			\
113 	mlxsw_res_set(res, MLXSW_RES_ID_##short_res_id, value)
114 
115 static inline void mlxsw_res_parse(struct mlxsw_res *res, u16 id, u64 value)
116 {
117 	int i;
118 
119 	for (i = 0; i < ARRAY_SIZE(mlxsw_res_ids); i++) {
120 		if (mlxsw_res_ids[i] == id) {
121 			mlxsw_res_set(res, i, value);
122 			return;
123 		}
124 	}
125 }
126 
127 #endif
128