1 2 #ifndef __NX_H__ 3 #define __NX_H__ 4 5 #include <crypto/ctr.h> 6 7 #define NX_NAME "nx-crypto" 8 #define NX_STRING "IBM Power7+ Nest Accelerator Crypto Driver" 9 #define NX_VERSION "1.0" 10 11 static const char nx_driver_string[] = NX_STRING; 12 static const char nx_driver_version[] = NX_VERSION; 13 14 /* a scatterlist in the format PHYP is expecting */ 15 struct nx_sg { 16 u64 addr; 17 u32 rsvd; 18 u32 len; 19 } __attribute((packed)); 20 21 #define NX_PAGE_SIZE (4096) 22 #define NX_MAX_SG_ENTRIES (NX_PAGE_SIZE/(sizeof(struct nx_sg))) 23 24 enum nx_status { 25 NX_DISABLED, 26 NX_WAITING, 27 NX_OKAY 28 }; 29 30 /* msc_triplet and max_sync_cop are used only to assist in parsing the 31 * openFirmware property */ 32 struct msc_triplet { 33 u32 keybitlen; 34 u32 databytelen; 35 u32 sglen; 36 } __packed; 37 38 struct max_sync_cop { 39 u32 fc; 40 u32 mode; 41 u32 triplets; 42 struct msc_triplet trip[0]; 43 } __packed; 44 45 struct alg_props { 46 u32 databytelen; 47 u32 sglen; 48 }; 49 50 #define NX_OF_FLAG_MAXSGLEN_SET (1) 51 #define NX_OF_FLAG_STATUS_SET (2) 52 #define NX_OF_FLAG_MAXSYNCCOP_SET (4) 53 #define NX_OF_FLAG_MASK_READY (NX_OF_FLAG_MAXSGLEN_SET | \ 54 NX_OF_FLAG_STATUS_SET | \ 55 NX_OF_FLAG_MAXSYNCCOP_SET) 56 struct nx_of { 57 u32 flags; 58 u32 max_sg_len; 59 enum nx_status status; 60 struct alg_props ap[NX_MAX_FC][NX_MAX_MODE][3]; 61 }; 62 63 struct nx_stats { 64 atomic_t aes_ops; 65 atomic64_t aes_bytes; 66 atomic_t sha256_ops; 67 atomic64_t sha256_bytes; 68 atomic_t sha512_ops; 69 atomic64_t sha512_bytes; 70 71 atomic_t sync_ops; 72 73 atomic_t errors; 74 atomic_t last_error; 75 atomic_t last_error_pid; 76 }; 77 78 struct nx_debugfs { 79 struct dentry *dfs_root; 80 struct dentry *dfs_aes_ops, *dfs_aes_bytes; 81 struct dentry *dfs_sha256_ops, *dfs_sha256_bytes; 82 struct dentry *dfs_sha512_ops, *dfs_sha512_bytes; 83 struct dentry *dfs_errors, *dfs_last_error, *dfs_last_error_pid; 84 }; 85 86 struct nx_crypto_driver { 87 struct nx_stats stats; 88 struct nx_of of; 89 struct vio_dev *viodev; 90 struct vio_driver viodriver; 91 struct nx_debugfs dfs; 92 }; 93 94 #define NX_GCM4106_NONCE_LEN (4) 95 #define NX_GCM_CTR_OFFSET (12) 96 struct nx_gcm_rctx { 97 u8 iv[16]; 98 }; 99 100 struct nx_gcm_priv { 101 u8 iauth_tag[16]; 102 u8 nonce[NX_GCM4106_NONCE_LEN]; 103 }; 104 105 #define NX_CCM_AES_KEY_LEN (16) 106 #define NX_CCM4309_AES_KEY_LEN (19) 107 #define NX_CCM4309_NONCE_LEN (3) 108 struct nx_ccm_rctx { 109 u8 iv[16]; 110 }; 111 112 struct nx_ccm_priv { 113 u8 b0[16]; 114 u8 iauth_tag[16]; 115 u8 oauth_tag[16]; 116 u8 nonce[NX_CCM4309_NONCE_LEN]; 117 }; 118 119 struct nx_xcbc_priv { 120 u8 key[16]; 121 }; 122 123 struct nx_ctr_priv { 124 u8 nonce[CTR_RFC3686_NONCE_SIZE]; 125 }; 126 127 struct nx_crypto_ctx { 128 spinlock_t lock; /* synchronize access to the context */ 129 void *kmem; /* unaligned, kmalloc'd buffer */ 130 size_t kmem_len; /* length of kmem */ 131 struct nx_csbcpb *csbcpb; /* aligned page given to phyp @ hcall time */ 132 struct vio_pfo_op op; /* operation struct with hcall parameters */ 133 struct nx_csbcpb *csbcpb_aead; /* secondary csbcpb used by AEAD algs */ 134 struct vio_pfo_op op_aead;/* operation struct for csbcpb_aead */ 135 136 struct nx_sg *in_sg; /* aligned pointer into kmem to an sg list */ 137 struct nx_sg *out_sg; /* aligned pointer into kmem to an sg list */ 138 139 struct alg_props *ap; /* pointer into props based on our key size */ 140 struct alg_props props[3];/* openFirmware properties for requests */ 141 struct nx_stats *stats; /* pointer into an nx_crypto_driver for stats 142 reporting */ 143 144 union { 145 struct nx_gcm_priv gcm; 146 struct nx_ccm_priv ccm; 147 struct nx_xcbc_priv xcbc; 148 struct nx_ctr_priv ctr; 149 } priv; 150 }; 151 152 struct crypto_aead; 153 154 /* prototypes */ 155 int nx_crypto_ctx_aes_ccm_init(struct crypto_aead *tfm); 156 int nx_crypto_ctx_aes_gcm_init(struct crypto_aead *tfm); 157 int nx_crypto_ctx_aes_xcbc_init(struct crypto_tfm *tfm); 158 int nx_crypto_ctx_aes_ctr_init(struct crypto_tfm *tfm); 159 int nx_crypto_ctx_aes_cbc_init(struct crypto_tfm *tfm); 160 int nx_crypto_ctx_aes_ecb_init(struct crypto_tfm *tfm); 161 int nx_crypto_ctx_sha_init(struct crypto_tfm *tfm); 162 void nx_crypto_ctx_exit(struct crypto_tfm *tfm); 163 void nx_crypto_ctx_aead_exit(struct crypto_aead *tfm); 164 void nx_ctx_init(struct nx_crypto_ctx *nx_ctx, unsigned int function); 165 int nx_hcall_sync(struct nx_crypto_ctx *ctx, struct vio_pfo_op *op, 166 u32 may_sleep); 167 struct nx_sg *nx_build_sg_list(struct nx_sg *, u8 *, unsigned int *, u32); 168 int nx_build_sg_lists(struct nx_crypto_ctx *, struct blkcipher_desc *, 169 struct scatterlist *, struct scatterlist *, unsigned int *, 170 unsigned int, u8 *); 171 struct nx_sg *nx_walk_and_build(struct nx_sg *, unsigned int, 172 struct scatterlist *, unsigned int, 173 unsigned int *); 174 175 #ifdef CONFIG_DEBUG_FS 176 #define NX_DEBUGFS_INIT(drv) nx_debugfs_init(drv) 177 #define NX_DEBUGFS_FINI(drv) nx_debugfs_fini(drv) 178 179 int nx_debugfs_init(struct nx_crypto_driver *); 180 void nx_debugfs_fini(struct nx_crypto_driver *); 181 #else 182 #define NX_DEBUGFS_INIT(drv) (0) 183 #define NX_DEBUGFS_FINI(drv) (0) 184 #endif 185 186 #define NX_PAGE_NUM(x) ((u64)(x) & 0xfffffffffffff000ULL) 187 188 extern struct crypto_alg nx_cbc_aes_alg; 189 extern struct crypto_alg nx_ecb_aes_alg; 190 extern struct aead_alg nx_gcm_aes_alg; 191 extern struct aead_alg nx_gcm4106_aes_alg; 192 extern struct crypto_alg nx_ctr3686_aes_alg; 193 extern struct aead_alg nx_ccm_aes_alg; 194 extern struct aead_alg nx_ccm4309_aes_alg; 195 extern struct shash_alg nx_shash_aes_xcbc_alg; 196 extern struct shash_alg nx_shash_sha512_alg; 197 extern struct shash_alg nx_shash_sha256_alg; 198 199 extern struct nx_crypto_driver nx_driver; 200 201 #define SCATTERWALK_TO_SG 1 202 #define SCATTERWALK_FROM_SG 0 203 204 #endif 205