1 /*
2 * file rm_policyloc.h
3 *
4 * Prototypes and data structures for the Resource Manager Policies.
5 *
6 * ============================================================================
7 * (C) Copyright 2012, 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 API includes */
48 #include <ti/drv/rm/rm_policy.h>
50 /* AVL BBST includes */
51 #include <ti/drv/rm/include/tree.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 /* Bit : Description
60 *-----------------------------
61 * 0 : Init (iI) - RM instance has initialization permission for resource
62 * 1 : Use (uU) - RM instance has usage permission for resource
63 * 2 : Exclusive (xX) - RM instance has exclusive allocation privilege for resource
64 * i.e. No other RM instance can reserve the resource if a RM
65 * instance with exclusive privilege reserves the resource
66 * 3 : Shared Linux (sS) - Resource has been reserved by the Linux kernel but can be
67 * allocated by the specified RM instances
68 * 4 - 15 : UNUSED
69 */
70 typedef uint16_t Rm_PolicyPermBits;
72 #define RM_POLICY_PERM_INIT_LOWER 'i'
73 #define RM_POLICY_PERM_INIT_UPPER 'I'
74 #define RM_POLICY_PERM_INIT_SHIFT 0
75 #define RM_POLICY_PERM_USE_LOWER 'u'
76 #define RM_POLICY_PERM_USE_UPPER 'U'
77 #define RM_POLICY_PERM_USE_SHIFT 1
78 #define RM_POLICY_PERM_EXCLUSIVE_LOWER 'x'
79 #define RM_POLICY_PERM_EXCLUSIVE_UPPER 'X'
80 #define RM_POLICY_PERM_EXCLUSIVE_SHIFT 2
81 #define RM_POLICY_PERM_SHARED_LINUX_LOWER 's'
82 #define RM_POLICY_PERM_SHARED_LINUX_UPPER 'S'
83 #define RM_POLICY_PERM_SHARED_LINUX_SHIFT 3
85 #define RM_POLICY_PERM_SUBGROUP_START '('
86 #define RM_POLICY_PERM_SUBGROUP_END ')'
87 #define RM_POLICY_PERM_TERMINATOR '&'
88 #define RM_POLICY_PERM_ASSIGNMENT '='
90 #define RM_policy_SET_PERM(permBits, permTypeShift, val) \
91 permBits = ((permBits & (~(((Rm_PolicyPermBits) 0x1) << permTypeShift))) | \
92 ((((Rm_PolicyPermBits) val) & 0x1) << permTypeShift))
93 #define RM_policy_GET_PERM(permBits, permTypeShift) \
94 ((permBits >> permTypeShift) & 0x1)
96 typedef struct Rm_Permission_s {
97 char instName[RM_INSTANCE_NAME_MAX_CHARS];
98 Rm_PolicyPermBits permissionBits;
99 struct Rm_Permission_s *nextPermission;
100 } Rm_PolicyPermission;
102 /**********************************************************************
103 ************** Policy Valid Instance Tree Definitions ****************
104 **********************************************************************/
106 /* Declare the tree structure nodes */
107 typedef struct _Rm_PolicyValidInstNode {
108 RB_ENTRY(_Rm_PolicyValidInstNode) linkage;
109 char name[RM_INSTANCE_NAME_MAX_CHARS];
110 uint32_t allocRefCount;
111 bool deletePending;
112 } Rm_PolicyValidInstNode;
114 /* Declare the tree head structure. */
115 typedef RB_HEAD(_Rm_PolicyValidInstTree, _Rm_PolicyValidInstNode) Rm_PolicyValidInstTree;
117 Rm_PolicyValidInstNode *Rm_policyNewValidInstNode(char *instName);
118 void Rm_policyFreeValidInstNode(Rm_PolicyValidInstNode *node);
119 /* Prototype for Valid Instance node comparison function
120 * element1 < element2 --> return < 0
121 * element1 = element2 --> return 0
122 * element1 > element2 --> return > 0 */
123 int Rm_policyValidInstNodeCompare(Rm_PolicyValidInstNode *node1, Rm_PolicyValidInstNode *node2);
125 /* Generate the tree prototypes */
126 RB_PROTOTYPE(_Rm_PolicyValidInstTree, _Rm_PolicyValidInstNode,
127 linkage, Rm_policyValidInstNodeCompare);
129 /**********************************************************************
130 *********************** Internal Policy APIs *************************
131 **********************************************************************/
133 typedef enum {
134 Rm_policyCheck_EXCLUSIVE = 0,
135 Rm_policyCheck_INIT,
136 Rm_policyCheck_USE
137 } Rm_PolicyCheckType;
139 typedef struct {
140 Rm_PolicyCheckType type;
141 void *policyDtb;
142 Rm_PolicyValidInstNode *validInstNode;
143 int32_t resourceOffset;
144 uint32_t resourceBase;
145 uint32_t resourceLength;
146 } Rm_PolicyCheckCfg;
148 Rm_PolicyValidInstNode *Rm_policyGetValidInstNode(Rm_PolicyValidInstTree *validInstTree, char *instName);
149 Rm_PolicyValidInstNode *Rm_policyGetLinuxInstNode(Rm_PolicyValidInstTree *validInstTree);
150 bool Rm_policyCheckPrivilege(Rm_PolicyCheckCfg *privilegeCfg, int32_t *result);
151 uint32_t Rm_policyGetResourceBase(void *policyDtb, Rm_PolicyValidInstNode *validInstNode,
152 int32_t resourceOffset, uint32_t allocType,
153 int32_t *result);
154 uint32_t Rm_policyGetResourceAlignment(void *policyDtb, int32_t resourceOffset);
155 int32_t Rm_policyGetResourceOffset(void *policyDtb, char *resourceName);
156 int32_t Rm_policyValidatePolicyResourceNames(void *allocatorList, void *policyDtb);
157 int32_t Rm_policyValidatePolicy(void *policyDtb, Rm_PolicyValidInstTree *validInstTree);
158 Rm_PolicyValidInstTree *Rm_policyCreateValidInstTree(void *policyDtb, int32_t *result);
159 void Rm_policyFreeValidInstTree(Rm_PolicyValidInstTree *validInstTree);
161 #ifdef __cplusplus
162 }
163 #endif
165 #endif /* RM_POLICYLOC_H_ */