1 /*
2  * Arm SCP/MCP Software
3  * Copyright (c) 2022, Arm Limited and Contributors. All rights reserved.
4  *
5  * SPDX-License-Identifier: BSD-3-Clause
6  */
7 
8 #include "tc2_scmi.h"
9 
10 #include <mod_resource_perms.h>
11 #include <mod_scmi_std.h>
12 
13 #include <fwk_element.h>
14 #include <fwk_id.h>
15 #include <fwk_macros.h>
16 #include <fwk_module.h>
17 #include <fwk_module_idx.h>
18 
19 /*!
20  * If the agent wants to modify permissions at run-time these tables
21  * must be allocated in writable memory.
22  */
23 
24 #define AGENT_IDX(agent_id) (agent_id - 1)
25 
26 static struct mod_res_agent_protocol_permissions agent_protocol_permissions[2] =
27     {
28         [AGENT_IDX(SCP_SCMI_AGENT_ID_OSPM)] =
29             {
30                 .protocols = MOD_RES_PERMS_SCMI_ALL_PROTOCOLS_ALLOWED,
31             },
32 
33         /* PSCI agent has no access to clock, perf and sensor protocol */
34         [AGENT_IDX(SCP_SCMI_AGENT_ID_PSCI)] =
35             {
36                 .protocols = MOD_RES_PERMS_SCMI_CLOCK_PROTOCOL_DENIED |
37                     MOD_RES_PERMS_SCMI_PERF_PROTOCOL_DENIED |
38                     MOD_RES_PERMS_SCMI_SENSOR_PROTOCOL_DENIED,
39             },
40     };
41 
42 /*
43  * Messages have an index offset from 0x3 as all agents can access
44  * the VERSION/ATTRIBUTES/MSG_ATTRIBUTES messages for all
45  * protocols, hence message 0x3 maps to bit[0], message 0x4 maps
46  * to bit[1], etc.
47  */
48 static struct mod_res_agent_msg_permissions
49     agent_msg_permissions[2] =
50         {
51             [AGENT_IDX(SCP_SCMI_AGENT_ID_OSPM)] =
52                 {
53                     .messages = {
54                         [MOD_RES_PERMS_SCMI_BASE_MESSAGE_IDX] = 0x0,
55                         [MOD_RES_PERMS_SCMI_POWER_DOMAIN_MESSAGE_IDX] =
56                             0x0,
57                         [MOD_RES_PERMS_SCMI_SYS_POWER_MESSAGE_IDX] = 0x0,
58                         [MOD_RES_PERMS_SCMI_PERF_MESSAGE_IDX] = 0x0,
59                         [MOD_RES_PERMS_SCMI_CLOCK_MESSAGE_IDX] = 0x0,
60                         [MOD_RES_PERMS_SCMI_SENSOR_MESSAGE_IDX] = 0x0,
61                         [MOD_RES_PERMS_SCMI_RESET_DOMAIN_MESSAGE_IDX] =
62                             0x0,
63                     },
64                 },
65             [AGENT_IDX(SCP_SCMI_AGENT_ID_PSCI)] =
66                 {
67                     .messages = {
68                         [MOD_RES_PERMS_SCMI_BASE_MESSAGE_IDX] = 0x0,
69                         [MOD_RES_PERMS_SCMI_POWER_DOMAIN_MESSAGE_IDX] =
70                             0x0,
71                         [MOD_RES_PERMS_SCMI_SYS_POWER_MESSAGE_IDX] = 0x0,
72                         [MOD_RES_PERMS_SCMI_PERF_MESSAGE_IDX] =
73                             ((1
74                             << (MOD_SCMI_PERF_DOMAIN_ATTRIBUTES -
75                                 MOD_SCMI_PERF_DOMAIN_ATTRIBUTES)) |
76                             (0
77                             << (MOD_SCMI_PERF_DESCRIBE_LEVELS -
78                                 MOD_SCMI_PERF_DOMAIN_ATTRIBUTES)) |
79                             (1
80                             << (MOD_SCMI_PERF_LIMITS_SET -
81                                 MOD_SCMI_PERF_DOMAIN_ATTRIBUTES)) |
82                             (1
83                             << (MOD_SCMI_PERF_LIMITS_GET -
84                                 MOD_SCMI_PERF_DOMAIN_ATTRIBUTES)) |
85                             (1
86                             << (MOD_SCMI_PERF_LEVEL_SET -
87                                 MOD_SCMI_PERF_DOMAIN_ATTRIBUTES)) |
88                             (1
89                             << (MOD_SCMI_PERF_LEVEL_GET -
90                                 MOD_SCMI_PERF_DOMAIN_ATTRIBUTES)) |
91                             (1
92                             << (MOD_SCMI_PERF_NOTIFY_LIMITS -
93                                 MOD_SCMI_PERF_DOMAIN_ATTRIBUTES)) |
94                             (1
95                             << (MOD_SCMI_PERF_NOTIFY_LEVEL -
96                                 MOD_SCMI_PERF_DOMAIN_ATTRIBUTES)) |
97                             (1
98                             << (MOD_SCMI_PERF_DESCRIBE_FAST_CHANNEL -
99                                 MOD_SCMI_PERF_DOMAIN_ATTRIBUTES))),
100                         /* Clocks, no access */
101                         [MOD_RES_PERMS_SCMI_CLOCK_MESSAGE_IDX] = 0xff,
102                         [MOD_RES_PERMS_SCMI_SENSOR_MESSAGE_IDX] = 0x0,
103                         [MOD_RES_PERMS_SCMI_RESET_DOMAIN_MESSAGE_IDX] =
104                             0x0,
105                     },
106                 },
107         };
108 
109 static struct mod_res_agent_permission agent_permissions = {
110     .agent_protocol_permissions = agent_protocol_permissions,
111     .agent_msg_permissions = agent_msg_permissions,
112 };
113 
114 struct fwk_module_config config_resource_perms = {
115     .data =
116         &(struct mod_res_resource_perms_config){
117             .agent_permissions = (uintptr_t)&agent_permissions,
118             .agent_count = SCP_SCMI_AGENT_ID_COUNT,
119             .protocol_count = 6,
120         },
121 };
122