1 2 #ifndef __NX_H__ 3 #define __NX_H__ 4 5 #define NX_NAME "nx-crypto" 6 #define NX_STRING "IBM Power7+ Nest Accelerator Crypto Driver" 7 #define NX_VERSION "1.0" 8 9 static const char nx_driver_string[] = NX_STRING; 10 static const char nx_driver_version[] = NX_VERSION; 11 12 /* a scatterlist in the format PHYP is expecting */ 13 struct nx_sg { 14 u64 addr; 15 u32 rsvd; 16 u32 len; 17 } __attribute((packed)); 18 19 #define NX_PAGE_SIZE (4096) 20 #define NX_MAX_SG_ENTRIES (NX_PAGE_SIZE/(sizeof(struct nx_sg))) 21 22 enum nx_status { 23 NX_DISABLED, 24 NX_WAITING, 25 NX_OKAY 26 }; 27 28 /* msc_triplet and max_sync_cop are used only to assist in parsing the 29 * openFirmware property */ 30 struct msc_triplet { 31 u32 keybitlen; 32 u32 databytelen; 33 u32 sglen; 34 } __packed; 35 36 struct max_sync_cop { 37 u32 fc; 38 u32 mode; 39 u32 triplets; 40 struct msc_triplet trip[0]; 41 } __packed; 42 43 struct alg_props { 44 u32 databytelen; 45 u32 sglen; 46 }; 47 48 #define NX_OF_FLAG_MAXSGLEN_SET (1) 49 #define NX_OF_FLAG_STATUS_SET (2) 50 #define NX_OF_FLAG_MAXSYNCCOP_SET (4) 51 #define NX_OF_FLAG_MASK_READY (NX_OF_FLAG_MAXSGLEN_SET | \ 52 NX_OF_FLAG_STATUS_SET | \ 53 NX_OF_FLAG_MAXSYNCCOP_SET) 54 struct nx_of { 55 u32 flags; 56 u32 max_sg_len; 57 enum nx_status status; 58 struct alg_props ap[NX_MAX_FC][NX_MAX_MODE][3]; 59 }; 60 61 struct nx_stats { 62 atomic_t aes_ops; 63 atomic64_t aes_bytes; 64 atomic_t sha256_ops; 65 atomic64_t sha256_bytes; 66 atomic_t sha512_ops; 67 atomic64_t sha512_bytes; 68 69 atomic_t sync_ops; 70 71 atomic_t errors; 72 atomic_t last_error; 73 atomic_t last_error_pid; 74 }; 75 76 struct nx_debugfs { 77 struct dentry *dfs_root; 78 struct dentry *dfs_aes_ops, *dfs_aes_bytes; 79 struct dentry *dfs_sha256_ops, *dfs_sha256_bytes; 80 struct dentry *dfs_sha512_ops, *dfs_sha512_bytes; 81 struct dentry *dfs_errors, *dfs_last_error, *dfs_last_error_pid; 82 }; 83 84 struct nx_crypto_driver { 85 struct nx_stats stats; 86 struct nx_of of; 87 struct vio_dev *viodev; 88 struct vio_driver viodriver; 89 struct nx_debugfs dfs; 90 }; 91 92 #define NX_GCM4106_NONCE_LEN (4) 93 #define NX_GCM_CTR_OFFSET (12) 94 struct nx_gcm_priv { 95 u8 iv[16]; 96 u8 iauth_tag[16]; 97 u8 nonce[NX_GCM4106_NONCE_LEN]; 98 }; 99 100 #define NX_CCM_AES_KEY_LEN (16) 101 #define NX_CCM4309_AES_KEY_LEN (19) 102 #define NX_CCM4309_NONCE_LEN (3) 103 struct nx_ccm_priv { 104 u8 iv[16]; 105 u8 b0[16]; 106 u8 iauth_tag[16]; 107 u8 oauth_tag[16]; 108 u8 nonce[NX_CCM4309_NONCE_LEN]; 109 }; 110 111 struct nx_xcbc_priv { 112 u8 key[16]; 113 }; 114 115 struct nx_ctr_priv { 116 u8 iv[16]; 117 }; 118 119 struct nx_crypto_ctx { 120 spinlock_t lock; /* synchronize access to the context */ 121 void *kmem; /* unaligned, kmalloc'd buffer */ 122 size_t kmem_len; /* length of kmem */ 123 struct nx_csbcpb *csbcpb; /* aligned page given to phyp @ hcall time */ 124 struct vio_pfo_op op; /* operation struct with hcall parameters */ 125 struct nx_csbcpb *csbcpb_aead; /* secondary csbcpb used by AEAD algs */ 126 struct vio_pfo_op op_aead;/* operation struct for csbcpb_aead */ 127 128 struct nx_sg *in_sg; /* aligned pointer into kmem to an sg list */ 129 struct nx_sg *out_sg; /* aligned pointer into kmem to an sg list */ 130 131 struct alg_props *ap; /* pointer into props based on our key size */ 132 struct alg_props props[3];/* openFirmware properties for requests */ 133 struct nx_stats *stats; /* pointer into an nx_crypto_driver for stats 134 reporting */ 135 136 union { 137 struct nx_gcm_priv gcm; 138 struct nx_ccm_priv ccm; 139 struct nx_xcbc_priv xcbc; 140 struct nx_ctr_priv ctr; 141 } priv; 142 }; 143 144 /* prototypes */ 145 int nx_crypto_ctx_aes_ccm_init(struct crypto_tfm *tfm); 146 int nx_crypto_ctx_aes_gcm_init(struct crypto_tfm *tfm); 147 int nx_crypto_ctx_aes_xcbc_init(struct crypto_tfm *tfm); 148 int nx_crypto_ctx_aes_ctr_init(struct crypto_tfm *tfm); 149 int nx_crypto_ctx_aes_cbc_init(struct crypto_tfm *tfm); 150 int nx_crypto_ctx_aes_ecb_init(struct crypto_tfm *tfm); 151 int nx_crypto_ctx_sha_init(struct crypto_tfm *tfm); 152 void nx_crypto_ctx_exit(struct crypto_tfm *tfm); 153 void nx_ctx_init(struct nx_crypto_ctx *nx_ctx, unsigned int function); 154 int nx_hcall_sync(struct nx_crypto_ctx *ctx, struct vio_pfo_op *op, 155 u32 may_sleep); 156 struct nx_sg *nx_build_sg_list(struct nx_sg *, u8 *, unsigned int, u32); 157 int nx_build_sg_lists(struct nx_crypto_ctx *, struct blkcipher_desc *, 158 struct scatterlist *, struct scatterlist *, unsigned int, 159 unsigned int, u8 *); 160 struct nx_sg *nx_walk_and_build(struct nx_sg *, unsigned int, 161 struct scatterlist *, unsigned int, 162 unsigned int); 163 164 #ifdef CONFIG_DEBUG_FS 165 #define NX_DEBUGFS_INIT(drv) nx_debugfs_init(drv) 166 #define NX_DEBUGFS_FINI(drv) nx_debugfs_fini(drv) 167 168 int nx_debugfs_init(struct nx_crypto_driver *); 169 void nx_debugfs_fini(struct nx_crypto_driver *); 170 #else 171 #define NX_DEBUGFS_INIT(drv) (0) 172 #define NX_DEBUGFS_FINI(drv) (0) 173 #endif 174 175 #define NX_PAGE_NUM(x) ((u64)(x) & 0xfffffffffffff000ULL) 176 177 extern struct crypto_alg nx_cbc_aes_alg; 178 extern struct crypto_alg nx_ecb_aes_alg; 179 extern struct crypto_alg nx_gcm_aes_alg; 180 extern struct crypto_alg nx_gcm4106_aes_alg; 181 extern struct crypto_alg nx_ctr_aes_alg; 182 extern struct crypto_alg nx_ctr3686_aes_alg; 183 extern struct crypto_alg nx_ccm_aes_alg; 184 extern struct crypto_alg nx_ccm4309_aes_alg; 185 extern struct shash_alg nx_shash_aes_xcbc_alg; 186 extern struct shash_alg nx_shash_sha512_alg; 187 extern struct shash_alg nx_shash_sha256_alg; 188 189 extern struct nx_crypto_driver nx_driver; 190 191 #define SCATTERWALK_TO_SG 1 192 #define SCATTERWALK_FROM_SG 0 193 194 #endif 195