/* Common header for Virtio crypto device. * * 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/>. */ #ifndef _VIRTIO_CRYPTO_COMMON_H #define _VIRTIO_CRYPTO_COMMON_H #include <linux/virtio.h> #include <linux/crypto.h> #include <linux/spinlock.h> #include <crypto/aead.h> #include <crypto/aes.h> #include <crypto/authenc.h> #include <crypto/engine.h> /* Internal representation of a data virtqueue */ struct data_queue { /* Virtqueue associated with this send _queue */ struct virtqueue *vq; /* To protect the vq operations for the dataq */ spinlock_t lock; /* Name of the tx queue: dataq.$index */ char name[32]; struct crypto_engine *engine; }; struct virtio_crypto { struct virtio_device *vdev; struct virtqueue *ctrl_vq; struct data_queue *data_vq; /* To protect the vq operations for the controlq */ spinlock_t ctrl_lock; /* Maximum of data queues supported by the device */ u32 max_data_queues; /* Number of queue currently used by the driver */ u32 curr_queue; /* Maximum length of cipher key */ u32 max_cipher_key_len; /* Maximum length of authenticated key */ u32 max_auth_key_len; /* Maximum size of per request */ u64 max_size; /* Control VQ buffers: protected by the ctrl_lock */ struct virtio_crypto_op_ctrl_req ctrl; struct virtio_crypto_session_input input; struct virtio_crypto_inhdr ctrl_status; unsigned long status; atomic_t ref_count; struct list_head list; struct module *owner; uint8_t dev_id; /* Does the affinity hint is set for virtqueues? */ bool affinity_hint_set; }; struct virtio_crypto_sym_session_info { /* Backend session id, which come from the host side */ __u64 session_id; }; struct virtio_crypto_ablkcipher_ctx { struct virtio_crypto *vcrypto; struct crypto_tfm *tfm; struct virtio_crypto_sym_session_info enc_sess_info; struct virtio_crypto_sym_session_info dec_sess_info; }; struct virtio_crypto_request { /* Cipher or aead */ uint32_t type; uint8_t status; struct virtio_crypto_ablkcipher_ctx *ablkcipher_ctx; struct ablkcipher_request *ablkcipher_req; struct virtio_crypto_op_data_req *req_data; struct scatterlist **sgs; uint8_t *iv; /* Encryption? */ bool encrypt; struct data_queue *dataq; }; int virtcrypto_devmgr_add_dev(struct virtio_crypto *vcrypto_dev); struct list_head *virtcrypto_devmgr_get_head(void); void virtcrypto_devmgr_rm_dev(struct virtio_crypto *vcrypto_dev); struct virtio_crypto *virtcrypto_devmgr_get_first(void); int virtcrypto_dev_in_use(struct virtio_crypto *vcrypto_dev); int virtcrypto_dev_get(struct virtio_crypto *vcrypto_dev); void virtcrypto_dev_put(struct virtio_crypto *vcrypto_dev); int virtcrypto_dev_started(struct virtio_crypto *vcrypto_dev); struct virtio_crypto *virtcrypto_get_dev_node(int node); int virtcrypto_dev_start(struct virtio_crypto *vcrypto); void virtcrypto_dev_stop(struct virtio_crypto *vcrypto); int virtio_crypto_ablkcipher_crypt_req( struct crypto_engine *engine, struct ablkcipher_request *req); void virtio_crypto_ablkcipher_finalize_req( struct virtio_crypto_request *vc_req, struct ablkcipher_request *req, int err); void virtcrypto_clear_request(struct virtio_crypto_request *vc_req);
static inline int virtio_crypto_get_current_node(void) { int cpu, node; cpu = get_cpu(); node = topology_physical_package_id(cpu); put_cpu(); return node; }Contributors
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