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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/* Common header for Virtio crypto device.3 *4 * Copyright 2016 HUAWEI TECHNOLOGIES CO., LTD.5 */6 7#ifndef _VIRTIO_CRYPTO_COMMON_H8#define _VIRTIO_CRYPTO_COMMON_H9 10#include <linux/virtio.h>11#include <linux/crypto.h>12#include <linux/spinlock.h>13#include <linux/interrupt.h>14#include <crypto/aead.h>15#include <crypto/aes.h>16#include <crypto/engine.h>17#include <uapi/linux/virtio_crypto.h>18 19 20/* Internal representation of a data virtqueue */21struct data_queue {22 /* Virtqueue associated with this send _queue */23 struct virtqueue *vq;24 25 /* To protect the vq operations for the dataq */26 spinlock_t lock;27 28 /* Name of the tx queue: dataq.$index */29 char name[32];30 31 struct crypto_engine *engine;32 struct tasklet_struct done_task;33};34 35struct virtio_crypto {36 struct virtio_device *vdev;37 struct virtqueue *ctrl_vq;38 struct data_queue *data_vq;39 40 /* Work struct for config space updates */41 struct work_struct config_work;42 43 /* To protect the vq operations for the controlq */44 spinlock_t ctrl_lock;45 46 /* Maximum of data queues supported by the device */47 u32 max_data_queues;48 49 /* Number of queue currently used by the driver */50 u32 curr_queue;51 52 /*53 * Specifies the services mask which the device support,54 * see VIRTIO_CRYPTO_SERVICE_*55 */56 u32 crypto_services;57 58 /* Detailed algorithms mask */59 u32 cipher_algo_l;60 u32 cipher_algo_h;61 u32 hash_algo;62 u32 mac_algo_l;63 u32 mac_algo_h;64 u32 aead_algo;65 u32 akcipher_algo;66 67 /* Maximum length of cipher key */68 u32 max_cipher_key_len;69 /* Maximum length of authenticated key */70 u32 max_auth_key_len;71 /* Maximum size of per request */72 u64 max_size;73 74 unsigned long status;75 atomic_t ref_count;76 struct list_head list;77 struct module *owner;78 uint8_t dev_id;79 80 /* Does the affinity hint is set for virtqueues? */81 bool affinity_hint_set;82};83 84struct virtio_crypto_sym_session_info {85 /* Backend session id, which come from the host side */86 __u64 session_id;87};88 89/*90 * Note: there are padding fields in request, clear them to zero before91 * sending to host to avoid to divulge any information.92 * Ex, virtio_crypto_ctrl_request::ctrl::u::destroy_session::padding[48]93 */94struct virtio_crypto_ctrl_request {95 struct virtio_crypto_op_ctrl_req ctrl;96 struct virtio_crypto_session_input input;97 struct virtio_crypto_inhdr ctrl_status;98 struct completion compl;99};100 101struct virtio_crypto_request;102typedef void (*virtio_crypto_data_callback)103 (struct virtio_crypto_request *vc_req, int len);104 105struct virtio_crypto_request {106 uint8_t status;107 struct virtio_crypto_op_data_req *req_data;108 struct scatterlist **sgs;109 struct data_queue *dataq;110 virtio_crypto_data_callback alg_cb;111};112 113int virtcrypto_devmgr_add_dev(struct virtio_crypto *vcrypto_dev);114struct list_head *virtcrypto_devmgr_get_head(void);115void virtcrypto_devmgr_rm_dev(struct virtio_crypto *vcrypto_dev);116struct virtio_crypto *virtcrypto_devmgr_get_first(void);117int virtcrypto_dev_in_use(struct virtio_crypto *vcrypto_dev);118int virtcrypto_dev_get(struct virtio_crypto *vcrypto_dev);119void virtcrypto_dev_put(struct virtio_crypto *vcrypto_dev);120int virtcrypto_dev_started(struct virtio_crypto *vcrypto_dev);121bool virtcrypto_algo_is_supported(struct virtio_crypto *vcrypto_dev,122 uint32_t service,123 uint32_t algo);124struct virtio_crypto *virtcrypto_get_dev_node(int node,125 uint32_t service,126 uint32_t algo);127int virtcrypto_dev_start(struct virtio_crypto *vcrypto);128void virtcrypto_dev_stop(struct virtio_crypto *vcrypto);129int virtio_crypto_skcipher_crypt_req(130 struct crypto_engine *engine, void *vreq);131 132void133virtcrypto_clear_request(struct virtio_crypto_request *vc_req);134 135static inline int virtio_crypto_get_current_node(void)136{137 int cpu, node;138 139 cpu = get_cpu();140 node = topology_physical_package_id(cpu);141 put_cpu();142 143 return node;144}145 146int virtio_crypto_skcipher_algs_register(struct virtio_crypto *vcrypto);147void virtio_crypto_skcipher_algs_unregister(struct virtio_crypto *vcrypto);148int virtio_crypto_akcipher_algs_register(struct virtio_crypto *vcrypto);149void virtio_crypto_akcipher_algs_unregister(struct virtio_crypto *vcrypto);150int virtio_crypto_ctrl_vq_request(struct virtio_crypto *vcrypto, struct scatterlist *sgs[],151 unsigned int out_sgs, unsigned int in_sgs,152 struct virtio_crypto_ctrl_request *vc_ctrl_req);153 154#endif /* _VIRTIO_CRYPTO_COMMON_H */155