linux-imx

/*

 * Copyright (c) 2015-2016, Linaro Limited

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 */

#include <linux/device.h>

#include <linux/dma-buf.h>

#include <linux/fdtable.h>

#include <linux/idr.h>

#include <linux/sched.h>

#include <linux/slab.h>

#include <linux/tee_drv.h>

#include "tee_private.h"

​

static void tee_shm_release(struct tee_shm *shm)

{

    struct tee_device *teedev = shm->teedev;

​

    mutex_lock(&teedev->mutex);

    idr_remove(&teedev->idr, shm->id);

    if (shm->ctx)

        list_del(&shm->link);

    mutex_unlock(&teedev->mutex);

​

    if (shm->flags & TEE_SHM_POOL) {

        struct tee_shm_pool_mgr *poolm;

​

        if (shm->flags & TEE_SHM_DMA_BUF)

            poolm = teedev->pool->dma_buf_mgr;

        else

            poolm = teedev->pool->private_mgr;

​

        poolm->ops->free(poolm, shm);

    } else if (shm->flags & TEE_SHM_REGISTER) {

        size_t n;

        int rc = teedev->desc->ops->shm_unregister(shm->ctx, shm);

​

        if (rc)

            dev_err(teedev->dev.parent,

                "unregister shm %p failed: %d", shm, rc);

​

        for (n = 0; n < shm->num_pages; n++)

            put_page(shm->pages[n]);

​

        kfree(shm->pages);

    }

​

    if (shm->ctx)

        teedev_ctx_put(shm->ctx);

​

    kfree(shm);

​

    tee_device_put(teedev);

}

​