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d79b5d0bbf
crypto engine was introduced since 'commit 735d37b542 ("crypto: engine
- Introduce the block request crypto engine framework")' which uses work
queue to realize the asynchronous processing for ablk_cipher and ahash.
For virtio-crypto device, I register an engine for each
data virtqueue so that we can use the capability of
multiple data queues in future.
Cc: Baolin Wang <baolin.wang@linaro.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
145 lines
4.0 KiB
C
145 lines
4.0 KiB
C
/* Common header for Virtio crypto device.
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*
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* Copyright 2016 HUAWEI TECHNOLOGIES CO., LTD.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _VIRTIO_CRYPTO_COMMON_H
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#define _VIRTIO_CRYPTO_COMMON_H
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#include <linux/virtio.h>
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#include <linux/crypto.h>
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#include <linux/spinlock.h>
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#include <crypto/aead.h>
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#include <crypto/aes.h>
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#include <crypto/authenc.h>
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#include <crypto/engine.h>
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/* Internal representation of a data virtqueue */
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struct data_queue {
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/* Virtqueue associated with this send _queue */
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struct virtqueue *vq;
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/* To protect the vq operations for the dataq */
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spinlock_t lock;
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/* Name of the tx queue: dataq.$index */
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char name[32];
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struct crypto_engine *engine;
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};
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struct virtio_crypto {
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struct virtio_device *vdev;
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struct virtqueue *ctrl_vq;
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struct data_queue *data_vq;
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/* To protect the vq operations for the controlq */
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spinlock_t ctrl_lock;
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/* Maximum of data queues supported by the device */
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u32 max_data_queues;
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/* Number of queue currently used by the driver */
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u32 curr_queue;
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/* Maximum length of cipher key */
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u32 max_cipher_key_len;
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/* Maximum length of authenticated key */
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u32 max_auth_key_len;
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/* Maximum size of per request */
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u64 max_size;
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/* Control VQ buffers: protected by the ctrl_lock */
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struct virtio_crypto_op_ctrl_req ctrl;
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struct virtio_crypto_session_input input;
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struct virtio_crypto_inhdr ctrl_status;
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unsigned long status;
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atomic_t ref_count;
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struct list_head list;
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struct module *owner;
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uint8_t dev_id;
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/* Does the affinity hint is set for virtqueues? */
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bool affinity_hint_set;
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};
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struct virtio_crypto_sym_session_info {
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/* Backend session id, which come from the host side */
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__u64 session_id;
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};
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struct virtio_crypto_ablkcipher_ctx {
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struct virtio_crypto *vcrypto;
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struct crypto_tfm *tfm;
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struct virtio_crypto_sym_session_info enc_sess_info;
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struct virtio_crypto_sym_session_info dec_sess_info;
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};
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struct virtio_crypto_request {
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/* Cipher or aead */
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uint32_t type;
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uint8_t status;
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struct virtio_crypto_ablkcipher_ctx *ablkcipher_ctx;
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struct ablkcipher_request *ablkcipher_req;
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struct virtio_crypto_op_data_req *req_data;
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struct scatterlist **sgs;
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uint8_t *iv;
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/* Encryption? */
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bool encrypt;
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struct data_queue *dataq;
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};
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int virtcrypto_devmgr_add_dev(struct virtio_crypto *vcrypto_dev);
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struct list_head *virtcrypto_devmgr_get_head(void);
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void virtcrypto_devmgr_rm_dev(struct virtio_crypto *vcrypto_dev);
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struct virtio_crypto *virtcrypto_devmgr_get_first(void);
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int virtcrypto_dev_in_use(struct virtio_crypto *vcrypto_dev);
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int virtcrypto_dev_get(struct virtio_crypto *vcrypto_dev);
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void virtcrypto_dev_put(struct virtio_crypto *vcrypto_dev);
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int virtcrypto_dev_started(struct virtio_crypto *vcrypto_dev);
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struct virtio_crypto *virtcrypto_get_dev_node(int node);
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int virtcrypto_dev_start(struct virtio_crypto *vcrypto);
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void virtcrypto_dev_stop(struct virtio_crypto *vcrypto);
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int virtio_crypto_ablkcipher_crypt_req(
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struct crypto_engine *engine,
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struct ablkcipher_request *req);
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void virtio_crypto_ablkcipher_finalize_req(
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struct virtio_crypto_request *vc_req,
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struct ablkcipher_request *req,
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int err);
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void
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virtcrypto_clear_request(struct virtio_crypto_request *vc_req);
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static inline int virtio_crypto_get_current_node(void)
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{
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int cpu, node;
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cpu = get_cpu();
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node = topology_physical_package_id(cpu);
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put_cpu();
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return node;
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}
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int virtio_crypto_algs_register(void);
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void virtio_crypto_algs_unregister(void);
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#endif /* _VIRTIO_CRYPTO_COMMON_H */
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