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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2018 Linaro Limited
*/
#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));
}
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