1 /*
2 * file rm_policyloc.h
3 *
4 * Internal prototypes and data structures for the Resource Manager Policies.
5 *
6 * ============================================================================
7 * (C) Copyright 2012-2013, Texas Instruments, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the
19 * distribution.
20 *
21 * Neither the name of Texas Instruments Incorporated nor the names of
22 * its contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * \par
38 */
40 #ifndef RM_POLICYLOC_H_
41 #define RM_POLICYLOC_H_
43 #ifdef __cplusplus
44 extern "C" {
45 #endif
47 /* RM external includes */
48 #include <ti/drv/rm/rm.h>
50 /* RM internal includes */
51 #include <ti/drv/rm/include/rm_treeloc.h>
53 /* String stored for resource elements that are reserved by the Linux kernel. These
54 * resources will be in use for the lifetime of the system
55 *
56 * TODO: MOVE TO policy.h LATER SO INTEGRATORS KNOW NOT TO NAME RM INSTANCES THIS NAME */
57 #define RM_ALLOCATED_TO_LINUX "Linux-Kernel"
59 /* Policy permission bit storage type
60 * Bit : Description
61 *-----------------------------
62 * 0 : Init (i) - RM instance has initialization permission for resource
63 * 1 : Use (u) - RM instance has usage permission for resource
64 * 2 : Exclusive (x) - RM instance has exclusive allocation privilege for resource
65 * i.e. No other RM instance can reserve the resource if a RM
66 * instance with exclusive privilege reserves the resource
67 * 3 : Shared Linux (s) - Resource has been reserved by the Linux kernel but can be
68 * allocated by the specified RM instances
69 * 4 - 15 : UNUSED
70 */
71 typedef uint16_t Rm_PolicyPermBits;
73 /* Initialization permission characters */
74 #define RM_POLICY_PERM_INIT_LOWER 'i'
75 #define RM_POLICY_PERM_INIT_UPPER 'I'
76 /* Initialization permission bit shift */
77 #define RM_POLICY_PERM_INIT_SHIFT 0
78 /* Usage permission characters */
79 #define RM_POLICY_PERM_USE_LOWER 'u'
80 #define RM_POLICY_PERM_USE_UPPER 'U'
81 /* Usage permission bit shift */
82 #define RM_POLICY_PERM_USE_SHIFT 1
83 /* Exclusive permission characters */
84 #define RM_POLICY_PERM_EXCLUSIVE_LOWER 'x'
85 #define RM_POLICY_PERM_EXCLUSIVE_UPPER 'X'
86 /* Exclusive permission bit shift */
87 #define RM_POLICY_PERM_EXCLUSIVE_SHIFT 2
88 /* Shared Linux permission characters */
89 #define RM_POLICY_PERM_SHARED_LINUX_LOWER 's'
90 #define RM_POLICY_PERM_SHARED_LINUX_UPPER 'S'
91 /* Shared Linux permission bit shift */
92 #define RM_POLICY_PERM_SHARED_LINUX_SHIFT 3
94 /* Permissions subgroup start character */
95 #define RM_POLICY_PERM_SUBGROUP_START '('
96 /* Permissions subgroup end character */
97 #define RM_POLICY_PERM_SUBGROUP_END ')'
98 /* Permissions subgroup terminator */
99 #define RM_POLICY_PERM_TERMINATOR '&'
100 /* Permissions assignment character */
101 #define RM_POLICY_PERM_ASSIGNMENT '='
103 /* Macro to set permissions in a Rm_PolicyPermBits type */
104 #define RM_policy_SET_PERM(permBits, permTypeShift, val) \
105 permBits = ((permBits & (~(((Rm_PolicyPermBits) 0x1) << permTypeShift))) | \
106 ((((Rm_PolicyPermBits) val) & 0x1) << permTypeShift))
107 /* Macro to get permissions from Rm_PolicyPermBits type */
108 #define RM_policy_GET_PERM(permBits, permTypeShift) \
109 ((permBits >> permTypeShift) & 0x1)
111 /* Assigned instance permissions linked list node */
112 typedef struct Rm_Permission_s {
113 /* Instance name of instance assigned the permissions */
114 char instName[RM_NAME_MAX_CHARS];
115 /* Permissions assigned to the RM instance with instName */
116 Rm_PolicyPermBits permissionBits;
117 /* Next permissions node */
118 struct Rm_Permission_s *nextPermission;
119 } Rm_PolicyPermission;
121 /* Permission validation types */
122 typedef enum {
123 /* Validate exclusive permissions for a resource */
124 Rm_policyCheck_EXCLUSIVE = 0,
125 /* Validate initialization permissions for a resource */
126 Rm_policyCheck_INIT,
127 /* Validate usage permissions for a resource */
128 Rm_policyCheck_USE,
129 /* Validate shared Linux permissions for a resource */
130 Rm_policyCheck_SHARED_LINUX
131 } Rm_PolicyCheckType;
133 /* Permissions validation configuration structure */
134 typedef struct {
135 /* The type of validation to perform */
136 Rm_PolicyCheckType type;
137 /* Policy to validate the permission check against */
138 void *policyDtb;
139 /* Valid instance node that will have its permissions checked for
140 * the defined resource */
141 Rm_PolicyValidInstNode *validInstNode;
142 /* Resource node offset in the policy DTB */
143 int32_t resourceOffset;
144 /* Resource base to validate permissions for the valid instance node */
145 uint32_t resourceBase;
146 /* Resource length to validate permissions for the valid instance node */
147 uint32_t resourceLength;
148 } Rm_PolicyCheckCfg;
150 void *rmPolicyGetPolicy(Rm_Handle rmHandle);
151 Rm_PolicyValidInstNode *rmPolicyGetValidInstNode(Rm_Handle rmHandle, char *instName);
152 Rm_PolicyValidInstNode *rmPolicyGetLinuxInstNode(Rm_Handle rmHandle);
153 int rmPolicyCheckPrivilege(Rm_PolicyCheckCfg *privilegeCfg, int32_t *result);
154 uint32_t rmPolicyGetResourceBase(void *policyDtb, Rm_PolicyValidInstNode *validInstNode,
155 int32_t resourceOffset, Rm_PolicyCheckType policyCheckType,
156 int32_t *result);
157 uint32_t rmPolicyGetResourceAlignment(void *policyDtb, int32_t resourceOffset);
158 int32_t rmPolicyGetResourceOffset(void *policyDtb, char *resourceName);
159 int32_t rmPolicyValidatePolicyResourceNames(Rm_Handle rmHandle);
160 int32_t rmPolicyValidatePolicy(Rm_Handle rmHandle);
161 Rm_PolicyValidInstTree *rmPolicyCreateValidInstTree(Rm_Handle rmHandle, int addLinux, int32_t *result);
162 void rmPolicyFreeValidInstTree(Rm_Handle rmHandle);
164 #ifdef __cplusplus
165 }
166 #endif
168 #endif /* RM_POLICYLOC_H_ */