linux-imx
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committed d0d859bb87ax
* Function notifies all the registered services that the virtio crypto device /* Management for virtio crypto devices (refer to adf_dev_mgr.c) * * Copyright 2016 HUAWEI TECHNOLOGIES CO., LTD. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, see <http://www.gnu.org/licenses/>. */static LIST_HEAD(virtio_crypto_table);static uint32_t num_devices;/* The table_lock protects the above global list and num_devices */static DEFINE_MUTEX(table_lock);/* * virtcrypto_devmgr_add_dev() - Add vcrypto_dev to the acceleration * framework. * @vcrypto_dev: Pointer to virtio crypto device. * * Function adds virtio crypto device to the global list. * To be used by virtio crypto device specific drivers. * * Return: 0 on success, error code othewise. */int virtcrypto_devmgr_add_dev(struct virtio_crypto *vcrypto_dev){ struct list_head *itr; mutex_lock(&table_lock); if (num_devices == VIRTIO_CRYPTO_MAX_DEVICES) { pr_info("virtio_crypto: only support up to %d devices\n", VIRTIO_CRYPTO_MAX_DEVICES); mutex_unlock(&table_lock); return -EFAULT; } list_for_each(itr, &virtio_crypto_table) { struct virtio_crypto *ptr = list_entry(itr, struct virtio_crypto, list); if (ptr == vcrypto_dev) { mutex_unlock(&table_lock); return -EEXIST; } } atomic_set(&vcrypto_dev->ref_count, 0); list_add_tail(&vcrypto_dev->list, &virtio_crypto_table); vcrypto_dev->dev_id = num_devices++; mutex_unlock(&table_lock); return 0;}struct list_head *virtcrypto_devmgr_get_head(void){ return &virtio_crypto_table;}/* * virtcrypto_devmgr_rm_dev() - Remove vcrypto_dev from the acceleration * framework. * @vcrypto_dev: Pointer to virtio crypto device. * * Function removes virtio crypto device from the acceleration framework. * To be used by virtio crypto device specific drivers. * * Return: void */void virtcrypto_devmgr_rm_dev(struct virtio_crypto *vcrypto_dev){ mutex_lock(&table_lock); list_del(&vcrypto_dev->list); num_devices--;