drivers/crypto/nx/nx.h

   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 /* prototypes */
 153 int nx_crypto_ctx_aes_ccm_init(struct crypto_tfm *tfm);
 154 int nx_crypto_ctx_aes_gcm_init(struct crypto_tfm *tfm);
 155 int nx_crypto_ctx_aes_xcbc_init(struct crypto_tfm *tfm);
 156 int nx_crypto_ctx_aes_ctr_init(struct crypto_tfm *tfm);
 157 int nx_crypto_ctx_aes_cbc_init(struct crypto_tfm *tfm);
 158 int nx_crypto_ctx_aes_ecb_init(struct crypto_tfm *tfm);
 159 int nx_crypto_ctx_sha_init(struct crypto_tfm *tfm);
 160 void nx_crypto_ctx_exit(struct crypto_tfm *tfm);
 161 void nx_ctx_init(struct nx_crypto_ctx *nx_ctx, unsigned int function);
 162 int nx_hcall_sync(struct nx_crypto_ctx *ctx, struct vio_pfo_op *op,
 163                   u32 may_sleep);
 164 struct nx_sg *nx_build_sg_list(struct nx_sg *, u8 *, unsigned int *, u32);
 165 int nx_build_sg_lists(struct nx_crypto_ctx *, struct blkcipher_desc *,
 166                       struct scatterlist *, struct scatterlist *, unsigned int *,
 167                       unsigned int, u8 *);
 168 struct nx_sg *nx_walk_and_build(struct nx_sg *, unsigned int,
 169                                 struct scatterlist *, unsigned int,
 170                                 unsigned int *);
 171
 172 #ifdef CONFIG_DEBUG_FS
 173 #define NX_DEBUGFS_INIT(drv)    nx_debugfs_init(drv)
 174 #define NX_DEBUGFS_FINI(drv)    nx_debugfs_fini(drv)
 175
 176 int nx_debugfs_init(struct nx_crypto_driver *);
 177 void nx_debugfs_fini(struct nx_crypto_driver *);
 178 #else
 179 #define NX_DEBUGFS_INIT(drv)    (0)
 180 #define NX_DEBUGFS_FINI(drv)    (0)
 181 #endif
 182
 183 #define NX_PAGE_NUM(x)          ((u64)(x) & 0xfffffffffffff000ULL)
 184
 185 extern struct crypto_alg nx_cbc_aes_alg;
 186 extern struct crypto_alg nx_ecb_aes_alg;
 187 extern struct crypto_alg nx_gcm_aes_alg;
 188 extern struct crypto_alg nx_gcm4106_aes_alg;
 189 extern struct crypto_alg nx_ctr_aes_alg;
 190 extern struct crypto_alg nx_ctr3686_aes_alg;
 191 extern struct crypto_alg nx_ccm_aes_alg;
 192 extern struct crypto_alg nx_ccm4309_aes_alg;
 193 extern struct shash_alg nx_shash_aes_xcbc_alg;
 194 extern struct shash_alg nx_shash_sha512_alg;
 195 extern struct shash_alg nx_shash_sha256_alg;
 196
 197 extern struct nx_crypto_driver nx_driver;
 198
 199 #define SCATTERWALK_TO_SG       1
 200 #define SCATTERWALK_FROM_SG     0
 201
 202 #endif