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 #include <uapi/linux/virtio_crypto.h> 17 18 19 /* Internal representation of a data virtqueue */ 20 struct data_queue { 21 /* Virtqueue associated with this send _queue */ 22 struct virtqueue *vq; 23 24 /* To protect the vq operations for the dataq */ 25 spinlock_t lock; 26 27 /* Name of the tx queue: dataq.$index */ 28 char name[32]; 29 30 struct crypto_engine *engine; 31 }; 32 33 struct virtio_crypto { 34 struct virtio_device *vdev; 35 struct virtqueue *ctrl_vq; 36 struct data_queue *data_vq; 37 38 /* To protect the vq operations for the controlq */ 39 spinlock_t ctrl_lock; 40 41 /* Maximum of data queues supported by the device */ 42 u32 max_data_queues; 43 44 /* Number of queue currently used by the driver */ 45 u32 curr_queue; 46 47 /* 48 * Specifies the services mask which the device support, 49 * see VIRTIO_CRYPTO_SERVICE_* 50 */ 51 u32 crypto_services; 52 53 /* Detailed algorithms mask */ 54 u32 cipher_algo_l; 55 u32 cipher_algo_h; 56 u32 hash_algo; 57 u32 mac_algo_l; 58 u32 mac_algo_h; 59 u32 aead_algo; 60 u32 akcipher_algo; 61 62 /* Maximum length of cipher key */ 63 u32 max_cipher_key_len; 64 /* Maximum length of authenticated key */ 65 u32 max_auth_key_len; 66 /* Maximum size of per request */ 67 u64 max_size; 68 69 unsigned long status; 70 atomic_t ref_count; 71 struct list_head list; 72 struct module *owner; 73 uint8_t dev_id; 74 75 /* Does the affinity hint is set for virtqueues? */ 76 bool affinity_hint_set; 77 }; 78 79 struct virtio_crypto_sym_session_info { 80 /* Backend session id, which come from the host side */ 81 __u64 session_id; 82 }; 83 84 /* 85 * Note: there are padding fields in request, clear them to zero before 86 * sending to host to avoid to divulge any information. 87 * Ex, virtio_crypto_ctrl_request::ctrl::u::destroy_session::padding[48] 88 */ 89 struct virtio_crypto_ctrl_request { 90 struct virtio_crypto_op_ctrl_req ctrl; 91 struct virtio_crypto_session_input input; 92 struct virtio_crypto_inhdr ctrl_status; 93 }; 94 95 struct virtio_crypto_request; 96 typedef void (*virtio_crypto_data_callback) 97 (struct virtio_crypto_request *vc_req, int len); 98 99 struct virtio_crypto_request { 100 uint8_t status; 101 struct virtio_crypto_op_data_req *req_data; 102 struct scatterlist **sgs; 103 struct data_queue *dataq; 104 virtio_crypto_data_callback alg_cb; 105 }; 106 107 int virtcrypto_devmgr_add_dev(struct virtio_crypto *vcrypto_dev); 108 struct list_head *virtcrypto_devmgr_get_head(void); 109 void virtcrypto_devmgr_rm_dev(struct virtio_crypto *vcrypto_dev); 110 struct virtio_crypto *virtcrypto_devmgr_get_first(void); 111 int virtcrypto_dev_in_use(struct virtio_crypto *vcrypto_dev); 112 int virtcrypto_dev_get(struct virtio_crypto *vcrypto_dev); 113 void virtcrypto_dev_put(struct virtio_crypto *vcrypto_dev); 114 int virtcrypto_dev_started(struct virtio_crypto *vcrypto_dev); 115 bool virtcrypto_algo_is_supported(struct virtio_crypto *vcrypto_dev, 116 uint32_t service, 117 uint32_t algo); 118 struct virtio_crypto *virtcrypto_get_dev_node(int node, 119 uint32_t service, 120 uint32_t algo); 121 int virtcrypto_dev_start(struct virtio_crypto *vcrypto); 122 void virtcrypto_dev_stop(struct virtio_crypto *vcrypto); 123 int virtio_crypto_skcipher_crypt_req( 124 struct crypto_engine *engine, void *vreq); 125 126 void 127 virtcrypto_clear_request(struct virtio_crypto_request *vc_req); 128 129 static inline int virtio_crypto_get_current_node(void) 130 { 131 int cpu, node; 132 133 cpu = get_cpu(); 134 node = topology_physical_package_id(cpu); 135 put_cpu(); 136 137 return node; 138 } 139 140 int virtio_crypto_skcipher_algs_register(struct virtio_crypto *vcrypto); 141 void virtio_crypto_skcipher_algs_unregister(struct virtio_crypto *vcrypto); 142 int virtio_crypto_akcipher_algs_register(struct virtio_crypto *vcrypto); 143 void virtio_crypto_akcipher_algs_unregister(struct virtio_crypto *vcrypto); 144 145 #endif /* _VIRTIO_CRYPTO_COMMON_H */ 146