[PADLOCK] Implement multi-block operations
By operating on multiple blocks at once, we expect to extract more performance out of the VIA Padlock. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -390,7 +390,7 @@ aes_set_key(void *ctx_arg, const uint8_t *in_key, unsigned int key_len, uint32_t
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/* ====== Encryption/decryption routines ====== */
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/* This is the real call to PadLock. */
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/* These are the real call to PadLock. */
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static inline void padlock_xcrypt_ecb(const u8 *input, u8 *output, void *key,
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void *control_word, u32 count)
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{
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@ -400,6 +400,17 @@ static inline void padlock_xcrypt_ecb(const u8 *input, u8 *output, void *key,
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: "d"(control_word), "b"(key), "c"(count));
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}
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static inline void padlock_xcrypt_cbc(const u8 *input, u8 *output, void *key,
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u8 *iv, void *control_word, u32 count)
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{
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/* Enforce key reload. */
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asm volatile ("pushfl; popfl");
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/* rep xcryptcbc */
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asm volatile (".byte 0xf3,0x0f,0xa7,0xd0"
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: "+S" (input), "+D" (output), "+a" (iv)
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: "d" (control_word), "b" (key), "c" (count));
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}
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static void
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aes_encrypt(void *ctx_arg, uint8_t *out, const uint8_t *in)
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{
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@ -414,6 +425,42 @@ aes_decrypt(void *ctx_arg, uint8_t *out, const uint8_t *in)
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padlock_xcrypt_ecb(in, out, ctx->D, &ctx->cword.decrypt, 1);
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}
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static unsigned int aes_encrypt_ecb(const struct cipher_desc *desc, u8 *out,
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const u8 *in, unsigned int nbytes)
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{
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struct aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(desc->tfm));
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padlock_xcrypt_ecb(in, out, ctx->E, &ctx->cword.encrypt,
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nbytes / AES_BLOCK_SIZE);
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return nbytes & ~(AES_BLOCK_SIZE - 1);
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}
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static unsigned int aes_decrypt_ecb(const struct cipher_desc *desc, u8 *out,
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const u8 *in, unsigned int nbytes)
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{
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struct aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(desc->tfm));
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padlock_xcrypt_ecb(in, out, ctx->D, &ctx->cword.decrypt,
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nbytes / AES_BLOCK_SIZE);
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return nbytes & ~(AES_BLOCK_SIZE - 1);
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}
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static unsigned int aes_encrypt_cbc(const struct cipher_desc *desc, u8 *out,
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const u8 *in, unsigned int nbytes)
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{
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struct aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(desc->tfm));
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padlock_xcrypt_cbc(in, out, ctx->E, desc->info, &ctx->cword.encrypt,
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nbytes / AES_BLOCK_SIZE);
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return nbytes & ~(AES_BLOCK_SIZE - 1);
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}
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static unsigned int aes_decrypt_cbc(const struct cipher_desc *desc, u8 *out,
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const u8 *in, unsigned int nbytes)
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{
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struct aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(desc->tfm));
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padlock_xcrypt_cbc(in, out, ctx->D, desc->info, &ctx->cword.decrypt,
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nbytes / AES_BLOCK_SIZE);
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return nbytes & ~(AES_BLOCK_SIZE - 1);
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}
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static struct crypto_alg aes_alg = {
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.cra_name = "aes",
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.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
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@ -429,7 +476,11 @@ static struct crypto_alg aes_alg = {
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.cia_max_keysize = AES_MAX_KEY_SIZE,
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.cia_setkey = aes_set_key,
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.cia_encrypt = aes_encrypt,
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.cia_decrypt = aes_decrypt
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.cia_decrypt = aes_decrypt,
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.cia_encrypt_ecb = aes_encrypt_ecb,
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.cia_decrypt_ecb = aes_decrypt_ecb,
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.cia_encrypt_cbc = aes_encrypt_cbc,
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.cia_decrypt_cbc = aes_decrypt_cbc,
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}
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}
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};
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