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 */ 19 struct 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 32 struct 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 82 struct virtio_crypto_sym_session_info { 83 /* Backend session id, which come from the host side */ 84 __u64 session_id; 85 }; 86 87 struct virtio_crypto_request; 88 typedef void (*virtio_crypto_data_callback) 89 (struct virtio_crypto_request *vc_req, int len); 90 91 struct 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 99 int virtcrypto_devmgr_add_dev(struct virtio_crypto *vcrypto_dev); 100 struct list_head *virtcrypto_devmgr_get_head(void); 101 void virtcrypto_devmgr_rm_dev(struct virtio_crypto *vcrypto_dev); 102 struct virtio_crypto *virtcrypto_devmgr_get_first(void); 103 int virtcrypto_dev_in_use(struct virtio_crypto *vcrypto_dev); 104 int virtcrypto_dev_get(struct virtio_crypto *vcrypto_dev); 105 void virtcrypto_dev_put(struct virtio_crypto *vcrypto_dev); 106 int virtcrypto_dev_started(struct virtio_crypto *vcrypto_dev); 107 bool virtcrypto_algo_is_supported(struct virtio_crypto *vcrypto_dev, 108 uint32_t service, 109 uint32_t algo); 110 struct virtio_crypto *virtcrypto_get_dev_node(int node, 111 uint32_t service, 112 uint32_t algo); 113 int virtcrypto_dev_start(struct virtio_crypto *vcrypto); 114 void virtcrypto_dev_stop(struct virtio_crypto *vcrypto); 115 int virtio_crypto_skcipher_crypt_req( 116 struct crypto_engine *engine, void *vreq); 117 118 void 119 virtcrypto_clear_request(struct virtio_crypto_request *vc_req); 120 121 static 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 } 131 132 int virtio_crypto_algs_register(struct virtio_crypto *vcrypto); 133 void virtio_crypto_algs_unregister(struct virtio_crypto *vcrypto); 134 135 #endif /* _VIRTIO_CRYPTO_COMMON_H */ 136