LXR linux/drivers/crypto/virtio/virtio_crypto

   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_H
   8#define _VIRTIO_CRYPTO_COMMON_H
   9
  10#include <linux/virtio.h>
  11#include <linux/crypto.h>
  12#include <linux/spinlock.h>
  13#include <crypto/aead.h>
  14#include <crypto/aes.h>
  15#include <crypto/engine.h>
  16
  17
  18/* Internal representation of a data virtqueue */
  19struct data_queue {
  20        /* Virtqueue associated with this send _queue */
  21        struct virtqueue *vq;
  22
  23        /* To protect the vq operations for the dataq */
  24        spinlock_t lock;
  25
  26        /* Name of the tx queue: dataq.$index */
  27        char name[32];
  28
  29        struct crypto_engine *engine;
  30};
  31
  32struct virtio_crypto {
  33        struct virtio_device *vdev;
  34        struct virtqueue *ctrl_vq;
  35        struct data_queue *data_vq;
  36
  37        /* To protect the vq operations for the controlq */
  38        spinlock_t ctrl_lock;
  39
  40        /* Maximum of data queues supported by the device */
  41        u32 max_data_queues;
  42
  43        /* Number of queue currently used by the driver */
  44        u32 curr_queue;
  45
  46        /*
  47         * Specifies the services mask which the device support,
  48         * see VIRTIO_CRYPTO_SERVICE_*
  49         */
  50        u32 crypto_services;
  51
  52        /* Detailed algorithms mask */
  53        u32 cipher_algo_l;
  54        u32 cipher_algo_h;
  55        u32 hash_algo;
  56        u32 mac_algo_l;
  57        u32 mac_algo_h;
  58        u32 aead_algo;
  59
  60        /* Maximum length of cipher key */
  61        u32 max_cipher_key_len;
  62        /* Maximum length of authenticated key */
  63        u32 max_auth_key_len;
  64        /* Maximum size of per request */
  65        u64 max_size;
  66
  67        /* Control VQ buffers: protected by the ctrl_lock */
  68        struct virtio_crypto_op_ctrl_req ctrl;
  69        struct virtio_crypto_session_input input;
  70        struct virtio_crypto_inhdr ctrl_status;
  71
  72        unsigned long status;
  73        atomic_t ref_count;
  74        struct list_head list;
  75        struct module *owner;
  76        uint8_t dev_id;
  77
  78        /* Does the affinity hint is set for virtqueues? */
  79        bool affinity_hint_set;
  80};
  81
  82struct virtio_crypto_sym_session_info {
  83        /* Backend session id, which come from the host side */
  84        __u64 session_id;
  85};
  86
  87struct virtio_crypto_request;
  88typedef void (*virtio_crypto_data_callback)
  89                (struct virtio_crypto_request *vc_req, int len);
  90
  91struct virtio_crypto_request {
  92        uint8_t status;
  93        struct virtio_crypto_op_data_req *req_data;
  94        struct scatterlist **sgs;
  95        struct data_queue *dataq;
  96        virtio_crypto_data_callback alg_cb;
  97};
  98
  99int virtcrypto_devmgr_add_dev(struct virtio_crypto *vcrypto_dev);
 100struct list_head *virtcrypto_devmgr_get_head(void);
 101void virtcrypto_devmgr_rm_dev(struct virtio_crypto *vcrypto_dev);
 102struct virtio_crypto *virtcrypto_devmgr_get_first(void);
 103int virtcrypto_dev_in_use(struct virtio_crypto *vcrypto_dev);
 104int virtcrypto_dev_get(struct virtio_crypto *vcrypto_dev);
 105void virtcrypto_dev_put(struct virtio_crypto *vcrypto_dev);
 106int virtcrypto_dev_started(struct virtio_crypto *vcrypto_dev);
 107bool virtcrypto_algo_is_supported(struct virtio_crypto *vcrypto_dev,
 108                                  uint32_t service,
 109                                  uint32_t algo);
 110struct virtio_crypto *virtcrypto_get_dev_node(int node,
 111                                              uint32_t service,
 112                                              uint32_t algo);
 113int virtcrypto_dev_start(struct virtio_crypto *vcrypto);
 114void virtcrypto_dev_stop(struct virtio_crypto *vcrypto);
 115int virtio_crypto_skcipher_crypt_req(
 116        struct crypto_engine *engine, void *vreq);
 117
 118void
 119virtcrypto_clear_request(struct virtio_crypto_request *vc_req);
 120
 121static inline int virtio_crypto_get_current_node(void)
 122{
 123        int cpu, node;
 124
 125        cpu = get_cpu();
 126        node = topology_physical_package_id(cpu);
 127        put_cpu();
 128
 129        return node;
 130}
 131
 132int virtio_crypto_algs_register(struct virtio_crypto *vcrypto);
 133void virtio_crypto_algs_unregister(struct virtio_crypto *vcrypto);
 134
 135#endif /* _VIRTIO_CRYPTO_COMMON_H */
 136