1 // SPDX-License-Identifier: BSD-2-Clause
2 /*
3 * Copyright (c) 2015, Linaro Limited
4 * All rights reserved.
5 */
6
7 #include <atomic.h>
8 #include <tee_ta_api.h>
9 #include <tee_api.h>
10 #include <ta_concurrent.h>
11 #include <trace.h>
12 #include <utee_defines.h>
13
TA_CreateEntryPoint(void)14 TEE_Result TA_CreateEntryPoint(void)
15 {
16 return TEE_SUCCESS;
17 }
18
TA_DestroyEntryPoint(void)19 void TA_DestroyEntryPoint(void)
20 {
21 }
22
TA_OpenSessionEntryPoint(uint32_t param_types,TEE_Param params[4],void ** session_ctx)23 TEE_Result TA_OpenSessionEntryPoint(uint32_t param_types,
24 TEE_Param params[4],
25 void **session_ctx)
26 {
27 (void)param_types;
28 (void)params;
29 (void)session_ctx;
30 return TEE_SUCCESS;
31 }
32
TA_CloseSessionEntryPoint(void * session_ctx)33 void TA_CloseSessionEntryPoint(void *session_ctx)
34 {
35 (void)session_ctx;
36 }
37
inc_active_count(struct ta_concurrent_shm * shm)38 static uint32_t inc_active_count(struct ta_concurrent_shm *shm)
39 {
40 return atomic_inc32(&shm->active_count);
41 }
42
dec_active_count(struct ta_concurrent_shm * shm)43 static uint32_t dec_active_count(struct ta_concurrent_shm *shm)
44 {
45 return atomic_dec32(&shm->active_count);
46 }
47
ta_entry_busy_loop(uint32_t param_types,TEE_Param params[4])48 static TEE_Result ta_entry_busy_loop(uint32_t param_types, TEE_Param params[4])
49 {
50 size_t num_rounds = 0;
51 uint32_t req_param_types =
52 TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT,
53 TEE_PARAM_TYPE_VALUE_INOUT,
54 TEE_PARAM_TYPE_NONE, TEE_PARAM_TYPE_NONE);
55
56 if (param_types != req_param_types) {
57 EMSG("got param_types 0x%x, expected 0x%x",
58 param_types, req_param_types);
59 return TEE_ERROR_BAD_PARAMETERS;
60 }
61
62 if (params[0].memref.size < sizeof(struct ta_concurrent_shm))
63 return TEE_ERROR_BAD_PARAMETERS;
64
65 params[1].value.b = inc_active_count(params[0].memref.buffer);
66
67 num_rounds = params[1].value.a;
68 while (num_rounds) {
69 volatile size_t n = 1000;
70
71 while (n)
72 n--;
73
74 num_rounds--;
75 }
76
77 dec_active_count(params[0].memref.buffer);
78 return TEE_SUCCESS;
79 }
80
ta_entry_sha256(uint32_t param_types,TEE_Param params[4])81 static TEE_Result ta_entry_sha256(uint32_t param_types, TEE_Param params[4])
82 {
83 TEE_Result res = TEE_ERROR_GENERIC;
84 TEE_OperationHandle op = TEE_HANDLE_NULL;
85 void *out = NULL;
86 uint32_t out_len = 0;
87 size_t num_rounds = 0;
88 uint32_t req_param_types =
89 TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT,
90 TEE_PARAM_TYPE_VALUE_INOUT,
91 TEE_PARAM_TYPE_MEMREF_INPUT,
92 TEE_PARAM_TYPE_MEMREF_OUTPUT);
93
94 if (param_types != req_param_types) {
95 EMSG("got param_types 0x%x, expected 0x%x",
96 param_types, req_param_types);
97 return TEE_ERROR_BAD_PARAMETERS;
98 }
99
100 if (params[0].memref.size < sizeof(struct ta_concurrent_shm))
101 return TEE_ERROR_BAD_PARAMETERS;
102 if (params[3].memref.size < TEE_SHA256_HASH_SIZE)
103 return TEE_ERROR_BAD_PARAMETERS;
104
105 params[1].value.b = inc_active_count(params[0].memref.buffer);
106
107 out_len = params[3].memref.size;
108 out = TEE_Malloc(out_len, 0);
109 if (!out) {
110 res = TEE_ERROR_OUT_OF_MEMORY;
111 goto out;
112 }
113
114 res = TEE_AllocateOperation(&op, TEE_ALG_SHA256, TEE_MODE_DIGEST, 0);
115 if (res != TEE_SUCCESS)
116 goto out;
117
118
119 num_rounds = params[1].value.a;
120 while (num_rounds) {
121 TEE_ResetOperation(op);
122 res = TEE_DigestDoFinal(op, params[2].memref.buffer,
123 params[2].memref.size, out, &out_len);
124 num_rounds--;
125 }
126
127 TEE_MemMove(params[3].memref.buffer, out, out_len);
128 params[3].memref.size = out_len;
129
130 out:
131 if (out)
132 TEE_Free(out);
133 if (op)
134 TEE_FreeOperation(op);
135 dec_active_count(params[0].memref.buffer);
136 return res;
137 }
138
TA_InvokeCommandEntryPoint(void * session_ctx,uint32_t cmd_id,uint32_t param_types,TEE_Param params[4])139 TEE_Result TA_InvokeCommandEntryPoint(void *session_ctx,
140 uint32_t cmd_id, uint32_t param_types,
141 TEE_Param params[4])
142 {
143 (void)session_ctx;
144
145 switch (cmd_id) {
146 case TA_CONCURRENT_CMD_BUSY_LOOP:
147 return ta_entry_busy_loop(param_types, params);
148 case TA_CONCURRENT_CMD_SHA256:
149 return ta_entry_sha256(param_types, params);
150 default:
151 return TEE_ERROR_BAD_PARAMETERS;
152 }
153 }
154