1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef __NX_H__ 4 #define __NX_H__ 5 6 #include <asm/vio.h> 7 #include <crypto/ctr.h> 8 #include <crypto/internal/aead.h> 9 #include <crypto/internal/hash.h> 10 #include <crypto/internal/skcipher.h> 11 12 #define NX_NAME "nx-crypto" 13 #define NX_STRING "IBM Power7+ Nest Accelerator Crypto Driver" 14 #define NX_VERSION "1.0" 15 16 /* a scatterlist in the format PHYP is expecting */ 17 struct nx_sg { 18 u64 addr; 19 u32 rsvd; 20 u32 len; 21 } __attribute((packed)); 22 23 #define NX_PAGE_SIZE (4096) 24 #define NX_MAX_SG_ENTRIES (NX_PAGE_SIZE/(sizeof(struct nx_sg))) 25 26 enum nx_status { 27 NX_DISABLED, 28 NX_WAITING, 29 NX_OKAY 30 }; 31 32 /* msc_triplet and max_sync_cop are used only to assist in parsing the 33 * openFirmware property */ 34 struct msc_triplet { 35 u32 keybitlen; 36 u32 databytelen; 37 u32 sglen; 38 } __packed; 39 40 struct max_sync_cop { 41 u32 fc; 42 u32 mode; 43 u32 triplets; 44 struct msc_triplet trip[]; 45 } __packed; 46 47 struct alg_props { 48 u32 databytelen; 49 u32 sglen; 50 }; 51 52 #define NX_OF_FLAG_MAXSGLEN_SET (1) 53 #define NX_OF_FLAG_STATUS_SET (2) 54 #define NX_OF_FLAG_MAXSYNCCOP_SET (4) 55 #define NX_OF_FLAG_MASK_READY (NX_OF_FLAG_MAXSGLEN_SET | \ 56 NX_OF_FLAG_STATUS_SET | \ 57 NX_OF_FLAG_MAXSYNCCOP_SET) 58 struct nx_of { 59 u32 flags; 60 u32 max_sg_len; 61 enum nx_status status; 62 struct alg_props ap[NX_MAX_FC][NX_MAX_MODE][3]; 63 }; 64 65 struct nx_stats { 66 atomic_t aes_ops; 67 atomic64_t aes_bytes; 68 atomic_t sha256_ops; 69 atomic64_t sha256_bytes; 70 atomic_t sha512_ops; 71 atomic64_t sha512_bytes; 72 73 atomic_t sync_ops; 74 75 atomic_t errors; 76 atomic_t last_error; 77 atomic_t last_error_pid; 78 }; 79 80 struct nx_crypto_driver { 81 struct nx_stats stats; 82 struct nx_of of; 83 struct vio_dev *viodev; 84 struct vio_driver viodriver; 85 struct dentry *dfs_root; 86 }; 87 88 #define NX_GCM4106_NONCE_LEN (4) 89 #define NX_GCM_CTR_OFFSET (12) 90 struct nx_gcm_rctx { 91 u8 iv[16]; 92 }; 93 94 struct nx_gcm_priv { 95 u8 iauth_tag[16]; 96 u8 nonce[NX_GCM4106_NONCE_LEN]; 97 }; 98 99 #define NX_CCM_AES_KEY_LEN (16) 100 #define NX_CCM4309_AES_KEY_LEN (19) 101 #define NX_CCM4309_NONCE_LEN (3) 102 struct nx_ccm_rctx { 103 u8 iv[16]; 104 }; 105 106 struct nx_ccm_priv { 107 u8 b0[16]; 108 u8 iauth_tag[16]; 109 u8 oauth_tag[16]; 110 u8 nonce[NX_CCM4309_NONCE_LEN]; 111 }; 112 113 struct nx_xcbc_priv { 114 u8 key[16]; 115 }; 116 117 struct nx_ctr_priv { 118 u8 nonce[CTR_RFC3686_NONCE_SIZE]; 119 }; 120 121 struct nx_crypto_ctx { 122 spinlock_t lock; /* synchronize access to the context */ 123 void *kmem; /* unaligned, kmalloc'd buffer */ 124 size_t kmem_len; /* length of kmem */ 125 struct nx_csbcpb *csbcpb; /* aligned page given to phyp @ hcall time */ 126 struct vio_pfo_op op; /* operation struct with hcall parameters */ 127 struct nx_csbcpb *csbcpb_aead; /* secondary csbcpb used by AEAD algs */ 128 struct vio_pfo_op op_aead;/* operation struct for csbcpb_aead */ 129 130 struct nx_sg *in_sg; /* aligned pointer into kmem to an sg list */ 131 struct nx_sg *out_sg; /* aligned pointer into kmem to an sg list */ 132 133 struct alg_props *ap; /* pointer into props based on our key size */ 134 struct alg_props props[3];/* openFirmware properties for requests */ 135 struct nx_stats *stats; /* pointer into an nx_crypto_driver for stats 136 reporting */ 137 138 union { 139 struct nx_gcm_priv gcm; 140 struct nx_ccm_priv ccm; 141 struct nx_xcbc_priv xcbc; 142 struct nx_ctr_priv ctr; 143 } priv; 144 }; 145 146 struct scatterlist; 147 148 /* prototypes */ 149 int nx_crypto_ctx_aes_ccm_init(struct crypto_aead *tfm); 150 int nx_crypto_ctx_aes_gcm_init(struct crypto_aead *tfm); 151 int nx_crypto_ctx_aes_xcbc_init(struct crypto_shash *tfm); 152 int nx_crypto_ctx_aes_ctr_init(struct crypto_skcipher *tfm); 153 int nx_crypto_ctx_aes_cbc_init(struct crypto_skcipher *tfm); 154 int nx_crypto_ctx_aes_ecb_init(struct crypto_skcipher *tfm); 155 int nx_crypto_ctx_sha_init(struct crypto_shash *tfm); 156 void nx_crypto_ctx_exit(struct crypto_tfm *tfm); 157 void nx_crypto_ctx_skcipher_exit(struct crypto_skcipher *tfm); 158 void nx_crypto_ctx_aead_exit(struct crypto_aead *tfm); 159 void nx_crypto_ctx_shash_exit(struct crypto_shash *tfm); 160 void nx_ctx_init(struct nx_crypto_ctx *nx_ctx, unsigned int function); 161 int nx_hcall_sync(struct nx_crypto_ctx *ctx, struct vio_pfo_op *op, 162 u32 may_sleep); 163 struct nx_sg *nx_build_sg_list(struct nx_sg *, u8 *, unsigned int *, u32); 164 int nx_build_sg_lists(struct nx_crypto_ctx *nx_ctx, const u8 *iv, 165 struct scatterlist *dst, struct scatterlist *src, 166 unsigned int *nbytes, unsigned int offset, u8 *oiv); 167 struct nx_sg *nx_walk_and_build(struct nx_sg *, unsigned int, 168 struct scatterlist *, unsigned int, 169 unsigned int *); 170 171 #ifdef CONFIG_DEBUG_FS 172 #define NX_DEBUGFS_INIT(drv) nx_debugfs_init(drv) 173 #define NX_DEBUGFS_FINI(drv) nx_debugfs_fini(drv) 174 175 void nx_debugfs_init(struct nx_crypto_driver *); 176 void nx_debugfs_fini(struct nx_crypto_driver *); 177 #else 178 #define NX_DEBUGFS_INIT(drv) do {} while (0) 179 #define NX_DEBUGFS_FINI(drv) do {} while (0) 180 #endif 181 182 #define NX_PAGE_NUM(x) ((u64)(x) & 0xfffffffffffff000ULL) 183 184 extern struct skcipher_alg nx_cbc_aes_alg; 185 extern struct skcipher_alg nx_ecb_aes_alg; 186 extern struct aead_alg nx_gcm_aes_alg; 187 extern struct aead_alg nx_gcm4106_aes_alg; 188 extern struct skcipher_alg nx_ctr3686_aes_alg; 189 extern struct aead_alg nx_ccm_aes_alg; 190 extern struct aead_alg nx_ccm4309_aes_alg; 191 extern struct shash_alg nx_shash_aes_xcbc_alg; 192 extern struct shash_alg nx_shash_sha512_alg; 193 extern struct shash_alg nx_shash_sha256_alg; 194 195 extern struct nx_crypto_driver nx_driver; 196 197 #endif 198