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sparc64: Move AES driver over to a methods based implementation.
Instead of testing and branching off of the key size on every encrypt/decrypt call, use method ops assigned at key set time. Reverse the order of float registers used for decryption to make future changes easier. Align all assembler routines on a 32-byte boundary. Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
parent
45dfe237a8
commit
0bdcaf7495
2 changed files with 832 additions and 441 deletions
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@ -26,12 +26,121 @@
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#include <asm/pstate.h>
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#include <asm/elf.h>
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struct aes_ops {
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void (*encrypt)(const u64 *key, const u32 *input, u32 *output);
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void (*decrypt)(const u64 *key, const u32 *input, u32 *output);
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void (*load_encrypt_keys)(const u64 *key);
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void (*load_decrypt_keys)(const u64 *key);
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void (*ecb_encrypt)(const u64 *key, const u64 *input, u64 *output,
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unsigned int len);
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void (*ecb_decrypt)(const u64 *key, const u64 *input, u64 *output,
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unsigned int len);
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void (*cbc_encrypt)(const u64 *key, const u64 *input, u64 *output,
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unsigned int len, u64 *iv);
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void (*cbc_decrypt)(const u64 *key, const u64 *input, u64 *output,
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unsigned int len, u64 *iv);
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};
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struct crypto_sparc64_aes_ctx {
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struct aes_ops *ops;
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u64 key[AES_MAX_KEYLENGTH / sizeof(u64)];
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u32 key_length;
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u32 expanded_key_length;
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};
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extern void aes_sparc64_encrypt_128(const u64 *key, const u32 *input,
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u32 *output);
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extern void aes_sparc64_encrypt_192(const u64 *key, const u32 *input,
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u32 *output);
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extern void aes_sparc64_encrypt_256(const u64 *key, const u32 *input,
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u32 *output);
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extern void aes_sparc64_decrypt_128(const u64 *key, const u32 *input,
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u32 *output);
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extern void aes_sparc64_decrypt_192(const u64 *key, const u32 *input,
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u32 *output);
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extern void aes_sparc64_decrypt_256(const u64 *key, const u32 *input,
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u32 *output);
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extern void aes_sparc64_load_encrypt_keys_128(const u64 *key);
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extern void aes_sparc64_load_encrypt_keys_192(const u64 *key);
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extern void aes_sparc64_load_encrypt_keys_256(const u64 *key);
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extern void aes_sparc64_load_decrypt_keys_128(const u64 *key);
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extern void aes_sparc64_load_decrypt_keys_192(const u64 *key);
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extern void aes_sparc64_load_decrypt_keys_256(const u64 *key);
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extern void aes_sparc64_ecb_encrypt_128(const u64 *key, const u64 *input,
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u64 *output, unsigned int len);
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extern void aes_sparc64_ecb_encrypt_192(const u64 *key, const u64 *input,
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u64 *output, unsigned int len);
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extern void aes_sparc64_ecb_encrypt_256(const u64 *key, const u64 *input,
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u64 *output, unsigned int len);
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extern void aes_sparc64_ecb_decrypt_128(const u64 *key, const u64 *input,
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u64 *output, unsigned int len);
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extern void aes_sparc64_ecb_decrypt_192(const u64 *key, const u64 *input,
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u64 *output, unsigned int len);
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extern void aes_sparc64_ecb_decrypt_256(const u64 *key, const u64 *input,
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u64 *output, unsigned int len);
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extern void aes_sparc64_cbc_encrypt_128(const u64 *key, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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extern void aes_sparc64_cbc_encrypt_192(const u64 *key, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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extern void aes_sparc64_cbc_encrypt_256(const u64 *key, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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extern void aes_sparc64_cbc_decrypt_128(const u64 *key, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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extern void aes_sparc64_cbc_decrypt_192(const u64 *key, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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extern void aes_sparc64_cbc_decrypt_256(const u64 *key, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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struct aes_ops aes128_ops = {
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.encrypt = aes_sparc64_encrypt_128,
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.decrypt = aes_sparc64_decrypt_128,
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.load_encrypt_keys = aes_sparc64_load_encrypt_keys_128,
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.load_decrypt_keys = aes_sparc64_load_decrypt_keys_128,
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.ecb_encrypt = aes_sparc64_ecb_encrypt_128,
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.ecb_decrypt = aes_sparc64_ecb_decrypt_128,
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.cbc_encrypt = aes_sparc64_cbc_encrypt_128,
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.cbc_decrypt = aes_sparc64_cbc_decrypt_128,
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};
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struct aes_ops aes192_ops = {
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.encrypt = aes_sparc64_encrypt_192,
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.decrypt = aes_sparc64_decrypt_192,
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.load_encrypt_keys = aes_sparc64_load_encrypt_keys_192,
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.load_decrypt_keys = aes_sparc64_load_decrypt_keys_192,
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.ecb_encrypt = aes_sparc64_ecb_encrypt_192,
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.ecb_decrypt = aes_sparc64_ecb_decrypt_192,
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.cbc_encrypt = aes_sparc64_cbc_encrypt_192,
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.cbc_decrypt = aes_sparc64_cbc_decrypt_192,
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};
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struct aes_ops aes256_ops = {
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.encrypt = aes_sparc64_encrypt_256,
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.decrypt = aes_sparc64_decrypt_256,
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.load_encrypt_keys = aes_sparc64_load_encrypt_keys_256,
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.load_decrypt_keys = aes_sparc64_load_decrypt_keys_256,
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.ecb_encrypt = aes_sparc64_ecb_encrypt_256,
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.ecb_decrypt = aes_sparc64_ecb_decrypt_256,
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.cbc_encrypt = aes_sparc64_cbc_encrypt_256,
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.cbc_decrypt = aes_sparc64_cbc_decrypt_256,
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};
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extern void aes_sparc64_key_expand(const u32 *in_key, u64 *output_key,
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unsigned int key_len);
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@ -44,14 +153,17 @@ static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
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switch (key_len) {
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case AES_KEYSIZE_128:
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ctx->expanded_key_length = 0xb0;
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ctx->ops = &aes128_ops;
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break;
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case AES_KEYSIZE_192:
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ctx->expanded_key_length = 0xd0;
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ctx->ops = &aes192_ops;
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break;
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case AES_KEYSIZE_256:
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ctx->expanded_key_length = 0xf0;
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ctx->ops = &aes256_ops;
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break;
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default:
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@ -65,38 +177,22 @@ static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
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return 0;
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}
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extern void aes_sparc64_encrypt(const u64 *key, const u32 *input,
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u32 *output, unsigned int key_len);
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static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
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aes_sparc64_encrypt(&ctx->key[0], (const u32 *) src,
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(u32 *) dst, ctx->key_length);
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ctx->ops->encrypt(&ctx->key[0], (const u32 *) src, (u32 *) dst);
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}
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extern void aes_sparc64_decrypt(const u64 *key, const u32 *input,
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u32 *output, unsigned int key_len,
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unsigned int expanded_key_len);
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static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
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aes_sparc64_decrypt(&ctx->key[0], (const u32 *) src,
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(u32 *) dst, ctx->key_length,
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ctx->expanded_key_length);
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ctx->ops->decrypt(&ctx->key[0], (const u32 *) src, (u32 *) dst);
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}
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extern void aes_sparc64_load_encrypt_keys(u64 *key);
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extern void aes_sparc64_load_decrypt_keys(u64 *key);
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#define AES_BLOCK_MASK (~(AES_BLOCK_SIZE-1))
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extern void aes_sparc64_ecb_encrypt(u64 *key, const u32 *input, u32 *output,
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unsigned int key_len, unsigned int len);
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static int ecb_encrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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@ -108,15 +204,15 @@ static int ecb_encrypt(struct blkcipher_desc *desc,
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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aes_sparc64_load_encrypt_keys(&ctx->key[0]);
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ctx->ops->load_encrypt_keys(&ctx->key[0]);
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while ((nbytes = walk.nbytes)) {
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unsigned int block_len = nbytes & AES_BLOCK_MASK;
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if (likely(block_len)) {
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aes_sparc64_ecb_encrypt(&ctx->key[0],
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(const u32 *)walk.src.virt.addr,
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(u32 *) walk.dst.virt.addr,
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ctx->key_length, block_len);
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ctx->ops->ecb_encrypt(&ctx->key[0],
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(const u64 *)walk.src.virt.addr,
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(u64 *) walk.dst.virt.addr,
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block_len);
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}
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nbytes &= AES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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@ -125,9 +221,6 @@ static int ecb_encrypt(struct blkcipher_desc *desc,
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return err;
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}
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extern void aes_sparc64_ecb_decrypt(u64 *ekey, const u32 *input, u32 *output,
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unsigned int key_len, unsigned int len);
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static int ecb_decrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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@ -140,14 +233,16 @@ static int ecb_decrypt(struct blkcipher_desc *desc,
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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aes_sparc64_load_decrypt_keys(&ctx->key[0]);
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ctx->ops->load_decrypt_keys(&ctx->key[0]);
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key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
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while ((nbytes = walk.nbytes)) {
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unsigned int block_len = nbytes & AES_BLOCK_MASK;
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aes_sparc64_ecb_decrypt(key_end, (const u32 *) walk.src.virt.addr,
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(u32 *) walk.dst.virt.addr, ctx->key_length,
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block_len);
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if (likely(block_len)) {
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ctx->ops->ecb_decrypt(key_end,
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(const u64 *) walk.src.virt.addr,
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(u64 *) walk.dst.virt.addr, block_len);
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}
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nbytes &= AES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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}
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@ -156,10 +251,6 @@ static int ecb_decrypt(struct blkcipher_desc *desc,
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return err;
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}
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extern void aes_sparc64_cbc_encrypt(u64 *key, const u32 *input, u32 *output,
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unsigned int key_len, unsigned int len,
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u64 *iv);
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static int cbc_encrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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@ -171,16 +262,15 @@ static int cbc_encrypt(struct blkcipher_desc *desc,
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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aes_sparc64_load_encrypt_keys(&ctx->key[0]);
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ctx->ops->load_encrypt_keys(&ctx->key[0]);
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while ((nbytes = walk.nbytes)) {
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unsigned int block_len = nbytes & AES_BLOCK_MASK;
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if (likely(block_len)) {
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aes_sparc64_cbc_encrypt(&ctx->key[0],
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(const u32 *)walk.src.virt.addr,
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(u32 *) walk.dst.virt.addr,
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ctx->key_length, block_len,
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(u64 *) walk.iv);
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ctx->ops->cbc_encrypt(&ctx->key[0],
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(const u64 *)walk.src.virt.addr,
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(u64 *) walk.dst.virt.addr,
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block_len, (u64 *) walk.iv);
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}
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nbytes &= AES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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@ -189,10 +279,6 @@ static int cbc_encrypt(struct blkcipher_desc *desc,
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return err;
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}
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extern void aes_sparc64_cbc_decrypt(u64 *ekey, unsigned int key_len,
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const u32 *input, u32 *output,
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unsigned int len, u64 *iv);
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static int cbc_decrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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@ -205,15 +291,17 @@ static int cbc_decrypt(struct blkcipher_desc *desc,
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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aes_sparc64_load_decrypt_keys(&ctx->key[0]);
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ctx->ops->load_decrypt_keys(&ctx->key[0]);
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key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
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while ((nbytes = walk.nbytes)) {
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unsigned int block_len = nbytes & AES_BLOCK_MASK;
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aes_sparc64_cbc_decrypt(key_end, ctx->key_length,
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(const u32 *) walk.src.virt.addr,
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(u32 *) walk.dst.virt.addr,
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block_len, (u64 *) walk.iv);
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if (likely(block_len)) {
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ctx->ops->cbc_decrypt(key_end,
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(const u64 *) walk.src.virt.addr,
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(u64 *) walk.dst.virt.addr,
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block_len, (u64 *) walk.iv);
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}
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nbytes &= AES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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}
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