![Victor Chong](/assets/img/avatar_default.png)
When dynamic shared memory support is enabled in the OP-TEE Trusted OS, it doesn't mean that the driver supports it, which can confuse users during debugging. Log a message when dynamic shared memory is enabled in the driver, to let users know for sure. Suggested-by: Jerome Forissier <jerome.forissier@linaro.org> Signed-off-by: Victor Chong <victor.chong@linaro.org> Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
732 lines
18 KiB
C
732 lines
18 KiB
C
/*
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* Copyright (c) 2015, Linaro Limited
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/arm-smccc.h>
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#include <linux/errno.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/tee_drv.h>
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#include <linux/types.h>
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#include <linux/uaccess.h>
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#include "optee_private.h"
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#include "optee_smc.h"
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#include "shm_pool.h"
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#define DRIVER_NAME "optee"
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#define OPTEE_SHM_NUM_PRIV_PAGES CONFIG_OPTEE_SHM_NUM_PRIV_PAGES
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/**
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* optee_from_msg_param() - convert from OPTEE_MSG parameters to
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* struct tee_param
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* @params: subsystem internal parameter representation
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* @num_params: number of elements in the parameter arrays
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* @msg_params: OPTEE_MSG parameters
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* Returns 0 on success or <0 on failure
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*/
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int optee_from_msg_param(struct tee_param *params, size_t num_params,
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const struct optee_msg_param *msg_params)
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{
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int rc;
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size_t n;
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struct tee_shm *shm;
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phys_addr_t pa;
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for (n = 0; n < num_params; n++) {
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struct tee_param *p = params + n;
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const struct optee_msg_param *mp = msg_params + n;
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u32 attr = mp->attr & OPTEE_MSG_ATTR_TYPE_MASK;
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switch (attr) {
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case OPTEE_MSG_ATTR_TYPE_NONE:
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p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE;
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memset(&p->u, 0, sizeof(p->u));
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break;
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case OPTEE_MSG_ATTR_TYPE_VALUE_INPUT:
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case OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT:
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case OPTEE_MSG_ATTR_TYPE_VALUE_INOUT:
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p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT +
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attr - OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
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p->u.value.a = mp->u.value.a;
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p->u.value.b = mp->u.value.b;
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p->u.value.c = mp->u.value.c;
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break;
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case OPTEE_MSG_ATTR_TYPE_TMEM_INPUT:
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case OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT:
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case OPTEE_MSG_ATTR_TYPE_TMEM_INOUT:
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p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT +
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attr - OPTEE_MSG_ATTR_TYPE_TMEM_INPUT;
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p->u.memref.size = mp->u.tmem.size;
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shm = (struct tee_shm *)(unsigned long)
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mp->u.tmem.shm_ref;
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if (!shm) {
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p->u.memref.shm_offs = 0;
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p->u.memref.shm = NULL;
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break;
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}
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rc = tee_shm_get_pa(shm, 0, &pa);
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if (rc)
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return rc;
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p->u.memref.shm_offs = mp->u.tmem.buf_ptr - pa;
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p->u.memref.shm = shm;
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/* Check that the memref is covered by the shm object */
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if (p->u.memref.size) {
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size_t o = p->u.memref.shm_offs +
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p->u.memref.size - 1;
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rc = tee_shm_get_pa(shm, o, NULL);
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if (rc)
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return rc;
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}
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break;
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case OPTEE_MSG_ATTR_TYPE_RMEM_INPUT:
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case OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT:
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case OPTEE_MSG_ATTR_TYPE_RMEM_INOUT:
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p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT +
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attr - OPTEE_MSG_ATTR_TYPE_RMEM_INPUT;
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p->u.memref.size = mp->u.rmem.size;
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shm = (struct tee_shm *)(unsigned long)
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mp->u.rmem.shm_ref;
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if (!shm) {
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p->u.memref.shm_offs = 0;
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p->u.memref.shm = NULL;
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break;
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}
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p->u.memref.shm_offs = mp->u.rmem.offs;
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p->u.memref.shm = shm;
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break;
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default:
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return -EINVAL;
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}
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}
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return 0;
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}
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static int to_msg_param_tmp_mem(struct optee_msg_param *mp,
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const struct tee_param *p)
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{
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int rc;
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phys_addr_t pa;
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mp->attr = OPTEE_MSG_ATTR_TYPE_TMEM_INPUT + p->attr -
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TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT;
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mp->u.tmem.shm_ref = (unsigned long)p->u.memref.shm;
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mp->u.tmem.size = p->u.memref.size;
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if (!p->u.memref.shm) {
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mp->u.tmem.buf_ptr = 0;
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return 0;
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}
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rc = tee_shm_get_pa(p->u.memref.shm, p->u.memref.shm_offs, &pa);
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if (rc)
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return rc;
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mp->u.tmem.buf_ptr = pa;
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mp->attr |= OPTEE_MSG_ATTR_CACHE_PREDEFINED <<
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OPTEE_MSG_ATTR_CACHE_SHIFT;
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return 0;
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}
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static int to_msg_param_reg_mem(struct optee_msg_param *mp,
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const struct tee_param *p)
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{
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mp->attr = OPTEE_MSG_ATTR_TYPE_RMEM_INPUT + p->attr -
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TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT;
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mp->u.rmem.shm_ref = (unsigned long)p->u.memref.shm;
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mp->u.rmem.size = p->u.memref.size;
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mp->u.rmem.offs = p->u.memref.shm_offs;
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return 0;
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}
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/**
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* optee_to_msg_param() - convert from struct tee_params to OPTEE_MSG parameters
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* @msg_params: OPTEE_MSG parameters
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* @num_params: number of elements in the parameter arrays
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* @params: subsystem itnernal parameter representation
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* Returns 0 on success or <0 on failure
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*/
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int optee_to_msg_param(struct optee_msg_param *msg_params, size_t num_params,
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const struct tee_param *params)
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{
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int rc;
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size_t n;
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for (n = 0; n < num_params; n++) {
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const struct tee_param *p = params + n;
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struct optee_msg_param *mp = msg_params + n;
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switch (p->attr) {
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case TEE_IOCTL_PARAM_ATTR_TYPE_NONE:
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mp->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE;
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memset(&mp->u, 0, sizeof(mp->u));
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break;
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case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT:
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case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT:
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case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT:
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mp->attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT + p->attr -
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TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT;
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mp->u.value.a = p->u.value.a;
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mp->u.value.b = p->u.value.b;
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mp->u.value.c = p->u.value.c;
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break;
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case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT:
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case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
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case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
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if (tee_shm_is_registered(p->u.memref.shm))
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rc = to_msg_param_reg_mem(mp, p);
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else
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rc = to_msg_param_tmp_mem(mp, p);
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if (rc)
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return rc;
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break;
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default:
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return -EINVAL;
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}
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}
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return 0;
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}
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static void optee_get_version(struct tee_device *teedev,
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struct tee_ioctl_version_data *vers)
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{
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struct tee_ioctl_version_data v = {
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.impl_id = TEE_IMPL_ID_OPTEE,
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.impl_caps = TEE_OPTEE_CAP_TZ,
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.gen_caps = TEE_GEN_CAP_GP,
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};
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struct optee *optee = tee_get_drvdata(teedev);
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if (optee->sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM)
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v.gen_caps |= TEE_GEN_CAP_REG_MEM;
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*vers = v;
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}
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static int optee_open(struct tee_context *ctx)
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{
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struct optee_context_data *ctxdata;
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struct tee_device *teedev = ctx->teedev;
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struct optee *optee = tee_get_drvdata(teedev);
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ctxdata = kzalloc(sizeof(*ctxdata), GFP_KERNEL);
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if (!ctxdata)
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return -ENOMEM;
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if (teedev == optee->supp_teedev) {
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bool busy = true;
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mutex_lock(&optee->supp.mutex);
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if (!optee->supp.ctx) {
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busy = false;
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optee->supp.ctx = ctx;
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}
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mutex_unlock(&optee->supp.mutex);
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if (busy) {
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kfree(ctxdata);
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return -EBUSY;
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}
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}
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mutex_init(&ctxdata->mutex);
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INIT_LIST_HEAD(&ctxdata->sess_list);
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ctx->data = ctxdata;
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return 0;
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}
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static void optee_release(struct tee_context *ctx)
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{
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struct optee_context_data *ctxdata = ctx->data;
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struct tee_device *teedev = ctx->teedev;
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struct optee *optee = tee_get_drvdata(teedev);
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struct tee_shm *shm;
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struct optee_msg_arg *arg = NULL;
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phys_addr_t parg;
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struct optee_session *sess;
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struct optee_session *sess_tmp;
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if (!ctxdata)
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return;
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shm = tee_shm_alloc(ctx, sizeof(struct optee_msg_arg), TEE_SHM_MAPPED);
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if (!IS_ERR(shm)) {
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arg = tee_shm_get_va(shm, 0);
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/*
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* If va2pa fails for some reason, we can't call into
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* secure world, only free the memory. Secure OS will leak
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* sessions and finally refuse more sessions, but we will
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* at least let normal world reclaim its memory.
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*/
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if (!IS_ERR(arg))
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if (tee_shm_va2pa(shm, arg, &parg))
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arg = NULL; /* prevent usage of parg below */
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}
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list_for_each_entry_safe(sess, sess_tmp, &ctxdata->sess_list,
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list_node) {
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list_del(&sess->list_node);
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if (!IS_ERR_OR_NULL(arg)) {
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memset(arg, 0, sizeof(*arg));
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arg->cmd = OPTEE_MSG_CMD_CLOSE_SESSION;
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arg->session = sess->session_id;
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optee_do_call_with_arg(ctx, parg);
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}
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kfree(sess);
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}
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kfree(ctxdata);
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if (!IS_ERR(shm))
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tee_shm_free(shm);
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ctx->data = NULL;
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if (teedev == optee->supp_teedev)
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optee_supp_release(&optee->supp);
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}
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static const struct tee_driver_ops optee_ops = {
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.get_version = optee_get_version,
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.open = optee_open,
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.release = optee_release,
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.open_session = optee_open_session,
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.close_session = optee_close_session,
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.invoke_func = optee_invoke_func,
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.cancel_req = optee_cancel_req,
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.shm_register = optee_shm_register,
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.shm_unregister = optee_shm_unregister,
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};
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static const struct tee_desc optee_desc = {
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.name = DRIVER_NAME "-clnt",
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.ops = &optee_ops,
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.owner = THIS_MODULE,
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};
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static const struct tee_driver_ops optee_supp_ops = {
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.get_version = optee_get_version,
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.open = optee_open,
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.release = optee_release,
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.supp_recv = optee_supp_recv,
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.supp_send = optee_supp_send,
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.shm_register = optee_shm_register_supp,
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.shm_unregister = optee_shm_unregister_supp,
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};
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static const struct tee_desc optee_supp_desc = {
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.name = DRIVER_NAME "-supp",
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.ops = &optee_supp_ops,
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.owner = THIS_MODULE,
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.flags = TEE_DESC_PRIVILEGED,
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};
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static bool optee_msg_api_uid_is_optee_api(optee_invoke_fn *invoke_fn)
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{
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struct arm_smccc_res res;
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invoke_fn(OPTEE_SMC_CALLS_UID, 0, 0, 0, 0, 0, 0, 0, &res);
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if (res.a0 == OPTEE_MSG_UID_0 && res.a1 == OPTEE_MSG_UID_1 &&
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res.a2 == OPTEE_MSG_UID_2 && res.a3 == OPTEE_MSG_UID_3)
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return true;
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return false;
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}
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static void optee_msg_get_os_revision(optee_invoke_fn *invoke_fn)
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{
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union {
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struct arm_smccc_res smccc;
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struct optee_smc_call_get_os_revision_result result;
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} res = {
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.result = {
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.build_id = 0
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}
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};
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invoke_fn(OPTEE_SMC_CALL_GET_OS_REVISION, 0, 0, 0, 0, 0, 0, 0,
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&res.smccc);
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if (res.result.build_id)
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pr_info("revision %lu.%lu (%08lx)", res.result.major,
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res.result.minor, res.result.build_id);
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else
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pr_info("revision %lu.%lu", res.result.major, res.result.minor);
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}
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static bool optee_msg_api_revision_is_compatible(optee_invoke_fn *invoke_fn)
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{
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union {
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struct arm_smccc_res smccc;
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struct optee_smc_calls_revision_result result;
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} res;
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invoke_fn(OPTEE_SMC_CALLS_REVISION, 0, 0, 0, 0, 0, 0, 0, &res.smccc);
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if (res.result.major == OPTEE_MSG_REVISION_MAJOR &&
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(int)res.result.minor >= OPTEE_MSG_REVISION_MINOR)
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return true;
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return false;
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}
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static bool optee_msg_exchange_capabilities(optee_invoke_fn *invoke_fn,
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u32 *sec_caps)
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{
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union {
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struct arm_smccc_res smccc;
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struct optee_smc_exchange_capabilities_result result;
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} res;
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u32 a1 = 0;
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/*
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* TODO This isn't enough to tell if it's UP system (from kernel
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* point of view) or not, is_smp() returns the the information
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* needed, but can't be called directly from here.
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*/
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if (!IS_ENABLED(CONFIG_SMP) || nr_cpu_ids == 1)
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a1 |= OPTEE_SMC_NSEC_CAP_UNIPROCESSOR;
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invoke_fn(OPTEE_SMC_EXCHANGE_CAPABILITIES, a1, 0, 0, 0, 0, 0, 0,
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&res.smccc);
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if (res.result.status != OPTEE_SMC_RETURN_OK)
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return false;
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*sec_caps = res.result.capabilities;
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return true;
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}
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static struct tee_shm_pool *
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optee_config_shm_memremap(optee_invoke_fn *invoke_fn, void **memremaped_shm,
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u32 sec_caps)
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{
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union {
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struct arm_smccc_res smccc;
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struct optee_smc_get_shm_config_result result;
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} res;
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unsigned long vaddr;
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phys_addr_t paddr;
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size_t size;
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phys_addr_t begin;
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phys_addr_t end;
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void *va;
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struct tee_shm_pool_mgr *priv_mgr;
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struct tee_shm_pool_mgr *dmabuf_mgr;
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void *rc;
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invoke_fn(OPTEE_SMC_GET_SHM_CONFIG, 0, 0, 0, 0, 0, 0, 0, &res.smccc);
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if (res.result.status != OPTEE_SMC_RETURN_OK) {
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pr_info("shm service not available\n");
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return ERR_PTR(-ENOENT);
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}
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if (res.result.settings != OPTEE_SMC_SHM_CACHED) {
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pr_err("only normal cached shared memory supported\n");
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return ERR_PTR(-EINVAL);
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}
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begin = roundup(res.result.start, PAGE_SIZE);
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end = rounddown(res.result.start + res.result.size, PAGE_SIZE);
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paddr = begin;
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size = end - begin;
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if (size < 2 * OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE) {
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pr_err("too small shared memory area\n");
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return ERR_PTR(-EINVAL);
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}
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va = memremap(paddr, size, MEMREMAP_WB);
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if (!va) {
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pr_err("shared memory ioremap failed\n");
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return ERR_PTR(-EINVAL);
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}
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vaddr = (unsigned long)va;
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/*
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* If OP-TEE can work with unregistered SHM, we will use own pool
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* for private shm
|
|
*/
|
|
if (sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM) {
|
|
rc = optee_shm_pool_alloc_pages();
|
|
if (IS_ERR(rc))
|
|
goto err_memunmap;
|
|
priv_mgr = rc;
|
|
} else {
|
|
const size_t sz = OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE;
|
|
|
|
rc = tee_shm_pool_mgr_alloc_res_mem(vaddr, paddr, sz,
|
|
3 /* 8 bytes aligned */);
|
|
if (IS_ERR(rc))
|
|
goto err_memunmap;
|
|
priv_mgr = rc;
|
|
|
|
vaddr += sz;
|
|
paddr += sz;
|
|
size -= sz;
|
|
}
|
|
|
|
rc = tee_shm_pool_mgr_alloc_res_mem(vaddr, paddr, size, PAGE_SHIFT);
|
|
if (IS_ERR(rc))
|
|
goto err_free_priv_mgr;
|
|
dmabuf_mgr = rc;
|
|
|
|
rc = tee_shm_pool_alloc(priv_mgr, dmabuf_mgr);
|
|
if (IS_ERR(rc))
|
|
goto err_free_dmabuf_mgr;
|
|
|
|
*memremaped_shm = va;
|
|
|
|
return rc;
|
|
|
|
err_free_dmabuf_mgr:
|
|
tee_shm_pool_mgr_destroy(dmabuf_mgr);
|
|
err_free_priv_mgr:
|
|
tee_shm_pool_mgr_destroy(priv_mgr);
|
|
err_memunmap:
|
|
memunmap(va);
|
|
return rc;
|
|
}
|
|
|
|
/* Simple wrapper functions to be able to use a function pointer */
|
|
static void optee_smccc_smc(unsigned long a0, unsigned long a1,
|
|
unsigned long a2, unsigned long a3,
|
|
unsigned long a4, unsigned long a5,
|
|
unsigned long a6, unsigned long a7,
|
|
struct arm_smccc_res *res)
|
|
{
|
|
arm_smccc_smc(a0, a1, a2, a3, a4, a5, a6, a7, res);
|
|
}
|
|
|
|
static void optee_smccc_hvc(unsigned long a0, unsigned long a1,
|
|
unsigned long a2, unsigned long a3,
|
|
unsigned long a4, unsigned long a5,
|
|
unsigned long a6, unsigned long a7,
|
|
struct arm_smccc_res *res)
|
|
{
|
|
arm_smccc_hvc(a0, a1, a2, a3, a4, a5, a6, a7, res);
|
|
}
|
|
|
|
static optee_invoke_fn *get_invoke_func(struct device_node *np)
|
|
{
|
|
const char *method;
|
|
|
|
pr_info("probing for conduit method from DT.\n");
|
|
|
|
if (of_property_read_string(np, "method", &method)) {
|
|
pr_warn("missing \"method\" property\n");
|
|
return ERR_PTR(-ENXIO);
|
|
}
|
|
|
|
if (!strcmp("hvc", method))
|
|
return optee_smccc_hvc;
|
|
else if (!strcmp("smc", method))
|
|
return optee_smccc_smc;
|
|
|
|
pr_warn("invalid \"method\" property: %s\n", method);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
static struct optee *optee_probe(struct device_node *np)
|
|
{
|
|
optee_invoke_fn *invoke_fn;
|
|
struct tee_shm_pool *pool;
|
|
struct optee *optee = NULL;
|
|
void *memremaped_shm = NULL;
|
|
struct tee_device *teedev;
|
|
u32 sec_caps;
|
|
int rc;
|
|
|
|
invoke_fn = get_invoke_func(np);
|
|
if (IS_ERR(invoke_fn))
|
|
return (void *)invoke_fn;
|
|
|
|
if (!optee_msg_api_uid_is_optee_api(invoke_fn)) {
|
|
pr_warn("api uid mismatch\n");
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
optee_msg_get_os_revision(invoke_fn);
|
|
|
|
if (!optee_msg_api_revision_is_compatible(invoke_fn)) {
|
|
pr_warn("api revision mismatch\n");
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
if (!optee_msg_exchange_capabilities(invoke_fn, &sec_caps)) {
|
|
pr_warn("capabilities mismatch\n");
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
/*
|
|
* We have no other option for shared memory, if secure world
|
|
* doesn't have any reserved memory we can use we can't continue.
|
|
*/
|
|
if (!(sec_caps & OPTEE_SMC_SEC_CAP_HAVE_RESERVED_SHM))
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
pool = optee_config_shm_memremap(invoke_fn, &memremaped_shm, sec_caps);
|
|
if (IS_ERR(pool))
|
|
return (void *)pool;
|
|
|
|
optee = kzalloc(sizeof(*optee), GFP_KERNEL);
|
|
if (!optee) {
|
|
rc = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
optee->invoke_fn = invoke_fn;
|
|
optee->sec_caps = sec_caps;
|
|
|
|
teedev = tee_device_alloc(&optee_desc, NULL, pool, optee);
|
|
if (IS_ERR(teedev)) {
|
|
rc = PTR_ERR(teedev);
|
|
goto err;
|
|
}
|
|
optee->teedev = teedev;
|
|
|
|
teedev = tee_device_alloc(&optee_supp_desc, NULL, pool, optee);
|
|
if (IS_ERR(teedev)) {
|
|
rc = PTR_ERR(teedev);
|
|
goto err;
|
|
}
|
|
optee->supp_teedev = teedev;
|
|
|
|
rc = tee_device_register(optee->teedev);
|
|
if (rc)
|
|
goto err;
|
|
|
|
rc = tee_device_register(optee->supp_teedev);
|
|
if (rc)
|
|
goto err;
|
|
|
|
mutex_init(&optee->call_queue.mutex);
|
|
INIT_LIST_HEAD(&optee->call_queue.waiters);
|
|
optee_wait_queue_init(&optee->wait_queue);
|
|
optee_supp_init(&optee->supp);
|
|
optee->memremaped_shm = memremaped_shm;
|
|
optee->pool = pool;
|
|
|
|
optee_enable_shm_cache(optee);
|
|
|
|
if (optee->sec_caps & OPTEE_SMC_SEC_CAP_DYNAMIC_SHM)
|
|
pr_info("dynamic shared memory is enabled\n");
|
|
|
|
pr_info("initialized driver\n");
|
|
return optee;
|
|
err:
|
|
if (optee) {
|
|
/*
|
|
* tee_device_unregister() is safe to call even if the
|
|
* devices hasn't been registered with
|
|
* tee_device_register() yet.
|
|
*/
|
|
tee_device_unregister(optee->supp_teedev);
|
|
tee_device_unregister(optee->teedev);
|
|
kfree(optee);
|
|
}
|
|
if (pool)
|
|
tee_shm_pool_free(pool);
|
|
if (memremaped_shm)
|
|
memunmap(memremaped_shm);
|
|
return ERR_PTR(rc);
|
|
}
|
|
|
|
static void optee_remove(struct optee *optee)
|
|
{
|
|
/*
|
|
* Ask OP-TEE to free all cached shared memory objects to decrease
|
|
* reference counters and also avoid wild pointers in secure world
|
|
* into the old shared memory range.
|
|
*/
|
|
optee_disable_shm_cache(optee);
|
|
|
|
/*
|
|
* The two devices has to be unregistered before we can free the
|
|
* other resources.
|
|
*/
|
|
tee_device_unregister(optee->supp_teedev);
|
|
tee_device_unregister(optee->teedev);
|
|
|
|
tee_shm_pool_free(optee->pool);
|
|
if (optee->memremaped_shm)
|
|
memunmap(optee->memremaped_shm);
|
|
optee_wait_queue_exit(&optee->wait_queue);
|
|
optee_supp_uninit(&optee->supp);
|
|
mutex_destroy(&optee->call_queue.mutex);
|
|
|
|
kfree(optee);
|
|
}
|
|
|
|
static const struct of_device_id optee_match[] = {
|
|
{ .compatible = "linaro,optee-tz" },
|
|
{},
|
|
};
|
|
|
|
static struct optee *optee_svc;
|
|
|
|
static int __init optee_driver_init(void)
|
|
{
|
|
struct device_node *fw_np;
|
|
struct device_node *np;
|
|
struct optee *optee;
|
|
|
|
/* Node is supposed to be below /firmware */
|
|
fw_np = of_find_node_by_name(NULL, "firmware");
|
|
if (!fw_np)
|
|
return -ENODEV;
|
|
|
|
np = of_find_matching_node(fw_np, optee_match);
|
|
if (!np || !of_device_is_available(np))
|
|
return -ENODEV;
|
|
|
|
optee = optee_probe(np);
|
|
of_node_put(np);
|
|
|
|
if (IS_ERR(optee))
|
|
return PTR_ERR(optee);
|
|
|
|
optee_svc = optee;
|
|
|
|
return 0;
|
|
}
|
|
module_init(optee_driver_init);
|
|
|
|
static void __exit optee_driver_exit(void)
|
|
{
|
|
struct optee *optee = optee_svc;
|
|
|
|
optee_svc = NULL;
|
|
if (optee)
|
|
optee_remove(optee);
|
|
}
|
|
module_exit(optee_driver_exit);
|
|
|
|
MODULE_AUTHOR("Linaro");
|
|
MODULE_DESCRIPTION("OP-TEE driver");
|
|
MODULE_SUPPORTED_DEVICE("");
|
|
MODULE_VERSION("1.0");
|
|
MODULE_LICENSE("GPL v2");
|