1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2018 Linaro Limited
*/
#define LOG_CATEGORY UCLASS_TEE
#include <common.h>
#include <dm.h>
#include <log.h>
#include <malloc.h>
#include <tee.h>
#include <dm/device-internal.h>
#include <dm/uclass-internal.h>
/**
* struct tee_uclass_priv - information of a TEE, stored by the uclass
*
* @list_shm: list of structe tee_shm representing memory blocks shared
* with the TEE.
*/
struct tee_uclass_priv {
struct list_head list_shm;
};
static const struct tee_driver_ops *tee_get_ops(struct udevice *dev)
{
return device_get_ops(dev);
}
void tee_get_version(struct udevice *dev, struct tee_version_data *vers)
{
tee_get_ops(dev)->get_version(dev, vers);
}
int tee_open_session(struct udevice *dev, struct tee_open_session_arg *arg,
uint num_param, struct tee_param *param)
{
return tee_get_ops(dev)->open_session(dev, arg, num_param, param);
}
int tee_close_session(struct udevice *dev, u32 session)
{
return tee_get_ops(dev)->close_session(dev, session);
}
int tee_invoke_func(struct udevice *dev, struct tee_invoke_arg *arg,
uint num_param, struct tee_param *param)
{
return tee_get_ops(dev)->invoke_func(dev, arg, num_param, param);
}
int __tee_shm_add(struct udevice *dev, ulong align, void *addr, ulong size,
u32 flags, struct tee_shm **shmp)
{
struct tee_shm *shm;
void *p = addr;
int rc;
if (flags & TEE_SHM_ALLOC) {
if (align)
p = memalign(align, size);
else
p = malloc(size);
}
if (!p)
return -ENOMEM;
shm = calloc(1, sizeof(*shm));
if (!shm) {
rc = -ENOMEM;
goto err;
}
shm->dev = dev;
shm->addr = p;
shm->size = size;
shm->flags = flags;
if (flags & TEE_SHM_SEC_REGISTER) {
rc = tee_get_ops(dev)->shm_register(dev, shm);
if (rc)
goto err;
}
if (flags & TEE_SHM_REGISTER) {
struct tee_uclass_priv *priv = dev_get_uclass_priv(dev);
list_add(&shm->link, &priv->list_shm);
}
*shmp = shm;
return 0;
err:
free(shm);
if (flags & TEE_SHM_ALLOC)
free(p);
return rc;
}
int tee_shm_alloc(struct udevice *dev, ulong size, u32 flags,
struct tee_shm **shmp)
{
u32 f = flags;
f |= TEE_SHM_SEC_REGISTER | TEE_SHM_REGISTER | TEE_SHM_ALLOC;
return __tee_shm_add(dev, 0, NULL, size, f, shmp);
}
int tee_shm_register(struct udevice *dev, void *addr, ulong size, u32 flags,
struct tee_shm **shmp)
{
u32 f = flags & ~TEE_SHM_ALLOC;
f |= TEE_SHM_SEC_REGISTER | TEE_SHM_REGISTER;
return __tee_shm_add(dev, 0, addr, size, f, shmp);
}
void tee_shm_free(struct tee_shm *shm)
{
if (!shm)
return;
if (shm->flags & TEE_SHM_SEC_REGISTER)
tee_get_ops(shm->dev)->shm_unregister(shm->dev, shm);
if (shm->flags & TEE_SHM_REGISTER)
list_del(&shm->link);
if (shm->flags & TEE_SHM_ALLOC)
free(shm->addr);
free(shm);
}
bool tee_shm_is_registered(struct tee_shm *shm, struct udevice *dev)
{
struct tee_uclass_priv *priv = dev_get_uclass_priv(dev);
struct tee_shm *s;
list_for_each_entry(s, &priv->list_shm, link)
if (s == shm)
return true;
return false;
}
struct udevice *tee_find_device(struct udevice *start,
int (*match)(struct tee_version_data *vers,
const void *data),
const void *data,
struct tee_version_data *vers)
{
struct udevice *dev = start;
struct tee_version_data lv;
struct tee_version_data *v = vers ? vers : &lv;
if (!dev)
uclass_find_first_device(UCLASS_TEE, &dev);
else
uclass_find_next_device(&dev);
for (; dev; uclass_find_next_device(&dev)) {
if (device_probe(dev))
continue;
tee_get_ops(dev)->get_version(dev, v);
if (!match || match(v, data))
return dev;
}
return NULL;
}
static int tee_pre_probe(struct udevice *dev)
{
struct tee_uclass_priv *priv = dev_get_uclass_priv(dev);
INIT_LIST_HEAD(&priv->list_shm);
return 0;
}
static int tee_pre_remove(struct udevice *dev)
{
struct tee_uclass_priv *priv = dev_get_uclass_priv(dev);
struct tee_shm *shm;
/*
* Any remaining shared memory must be unregistered now as U-Boot
* is about to hand over to the next stage and that memory will be
* reused.
*/
while (!list_empty(&priv->list_shm)) {
shm = list_first_entry(&priv->list_shm, struct tee_shm, link);
debug("%s: freeing leftover shm %p (size %lu, flags %#x)\n",
__func__, (void *)shm, shm->size, shm->flags);
tee_shm_free(shm);
}
return 0;
}
UCLASS_DRIVER(tee) = {
.id = UCLASS_TEE,
.name = "tee",
.per_device_auto = sizeof(struct tee_uclass_priv),
.pre_probe = tee_pre_probe,
.pre_remove = tee_pre_remove,
};
void tee_optee_ta_uuid_from_octets(struct tee_optee_ta_uuid *d,
const u8 s[TEE_UUID_LEN])
{
d->time_low = ((u32)s[0] << 24) | ((u32)s[1] << 16) |
((u32)s[2] << 8) | s[3],
d->time_mid = ((u32)s[4] << 8) | s[5];
d->time_hi_and_version = ((u32)s[6] << 8) | s[7];
memcpy(d->clock_seq_and_node, s + 8, sizeof(d->clock_seq_and_node));
}
void tee_optee_ta_uuid_to_octets(u8 d[TEE_UUID_LEN],
const struct tee_optee_ta_uuid *s)
{
d[0] = s->time_low >> 24;
d[1] = s->time_low >> 16;
d[2] = s->time_low >> 8;
d[3] = s->time_low;
d[4] = s->time_mid >> 8;
d[5] = s->time_mid;
d[6] = s->time_hi_and_version >> 8;
d[7] = s->time_hi_and_version;
memcpy(d + 8, s->clock_seq_and_node, sizeof(s->clock_seq_and_node));
}
|
