Merge git://git.infradead.org/users/willy/linux-nvme

[mirror_ubuntu-zesty-kernel.git] / arch / x86 / crypto / aesni-intel_glue.c

/*
 * Support for Intel AES-NI instructions. This file contains glue
 * code, the real AES implementation is in intel-aes_asm.S.
 *
 * Copyright (C) 2008, Intel Corp.
 *    Author: Huang Ying <ying.huang@intel.com>
 *
 * Added RFC4106 AES-GCM support for 128-bit keys under the AEAD
 * interface for 64-bit kernels.
 *    Authors: Adrian Hoban <adrian.hoban@intel.com>
 *             Gabriele Paoloni <gabriele.paoloni@intel.com>
 *             Tadeusz Struk (tadeusz.struk@intel.com)
 *             Aidan O'Mahony (aidan.o.mahony@intel.com)
 *    Copyright (c) 2010, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/hardirq.h>
#include <linux/types.h>
#include <linux/crypto.h>
#include <linux/module.h>
#include <linux/err.h>
#include <crypto/algapi.h>
#include <crypto/aes.h>
#include <crypto/cryptd.h>
#include <crypto/ctr.h>
#include <crypto/b128ops.h>
#include <crypto/lrw.h>
#include <crypto/xts.h>
#include <asm/cpu_device_id.h>
#include <asm/i387.h>
#include <asm/crypto/aes.h>
#include <crypto/ablk_helper.h>
#include <crypto/scatterwalk.h>
#include <crypto/internal/aead.h>
#include <linux/workqueue.h>
#include <linux/spinlock.h>
#ifdef CONFIG_X86_64
#include <asm/crypto/glue_helper.h>
#endif

#if defined(CONFIG_CRYPTO_PCBC) || defined(CONFIG_CRYPTO_PCBC_MODULE)
#define HAS_PCBC
#endif

/* This data is stored at the end of the crypto_tfm struct.
 * It's a type of per "session" data storage location.
 * This needs to be 16 byte aligned.
 */
struct aesni_rfc4106_gcm_ctx {
        u8 hash_subkey[16];
        struct crypto_aes_ctx aes_key_expanded;
        u8 nonce[4];
        struct cryptd_aead *cryptd_tfm;
};

struct aesni_gcm_set_hash_subkey_result {
        int err;
        struct completion completion;
};

struct aesni_hash_subkey_req_data {
        u8 iv[16];
        struct aesni_gcm_set_hash_subkey_result result;
        struct scatterlist sg;
};

#define AESNI_ALIGN     (16)
#define AES_BLOCK_MASK  (~(AES_BLOCK_SIZE-1))
#define RFC4106_HASH_SUBKEY_SIZE 16

struct aesni_lrw_ctx {
        struct lrw_table_ctx lrw_table;
        u8 raw_aes_ctx[sizeof(struct crypto_aes_ctx) + AESNI_ALIGN - 1];
};

struct aesni_xts_ctx {
        u8 raw_tweak_ctx[sizeof(struct crypto_aes_ctx) + AESNI_ALIGN - 1];
        u8 raw_crypt_ctx[sizeof(struct crypto_aes_ctx) + AESNI_ALIGN - 1];
};

asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
                             unsigned int key_len);
asmlinkage void aesni_enc(struct crypto_aes_ctx *ctx, u8 *out,
                          const u8 *in);
asmlinkage void aesni_dec(struct crypto_aes_ctx *ctx, u8 *out,
                          const u8 *in);
asmlinkage void aesni_ecb_enc(struct crypto_aes_ctx *ctx, u8 *out,
                              const u8 *in, unsigned int len);
asmlinkage void aesni_ecb_dec(struct crypto_aes_ctx *ctx, u8 *out,
                              const u8 *in, unsigned int len);
asmlinkage void aesni_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out,
                              const u8 *in, unsigned int len, u8 *iv);
asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out,
                              const u8 *in, unsigned int len, u8 *iv);

int crypto_fpu_init(void);
void crypto_fpu_exit(void);

#define AVX_GEN2_OPTSIZE 640
#define AVX_GEN4_OPTSIZE 4096

#ifdef CONFIG_X86_64
asmlinkage void aesni_ctr_enc(struct crypto_aes_ctx *ctx, u8 *out,
                              const u8 *in, unsigned int len, u8 *iv);

asmlinkage void aesni_xts_crypt8(struct crypto_aes_ctx *ctx, u8 *out,
                                 const u8 *in, bool enc, u8 *iv);

/* asmlinkage void aesni_gcm_enc()
 * void *ctx,  AES Key schedule. Starts on a 16 byte boundary.
 * u8 *out, Ciphertext output. Encrypt in-place is allowed.
 * const u8 *in, Plaintext input
 * unsigned long plaintext_len, Length of data in bytes for encryption.
 * u8 *iv, Pre-counter block j0: 4 byte salt (from Security Association)
 *         concatenated with 8 byte Initialisation Vector (from IPSec ESP
 *         Payload) concatenated with 0x00000001. 16-byte aligned pointer.
 * u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
 * const u8 *aad, Additional Authentication Data (AAD)
 * unsigned long aad_len, Length of AAD in bytes. With RFC4106 this
 *          is going to be 8 or 12 bytes
 * u8 *auth_tag, Authenticated Tag output.
 * unsigned long auth_tag_len), Authenticated Tag Length in bytes.
 *          Valid values are 16 (most likely), 12 or 8.
 */
asmlinkage void aesni_gcm_enc(void *ctx, u8 *out,
                        const u8 *in, unsigned long plaintext_len, u8 *iv,
                        u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
                        u8 *auth_tag, unsigned long auth_tag_len);

/* asmlinkage void aesni_gcm_dec()
 * void *ctx, AES Key schedule. Starts on a 16 byte boundary.
 * u8 *out, Plaintext output. Decrypt in-place is allowed.
 * const u8 *in, Ciphertext input
 * unsigned long ciphertext_len, Length of data in bytes for decryption.
 * u8 *iv, Pre-counter block j0: 4 byte salt (from Security Association)
 *         concatenated with 8 byte Initialisation Vector (from IPSec ESP
 *         Payload) concatenated with 0x00000001. 16-byte aligned pointer.
 * u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
 * const u8 *aad, Additional Authentication Data (AAD)
 * unsigned long aad_len, Length of AAD in bytes. With RFC4106 this is going
 * to be 8 or 12 bytes
 * u8 *auth_tag, Authenticated Tag output.
 * unsigned long auth_tag_len) Authenticated Tag Length in bytes.
 * Valid values are 16 (most likely), 12 or 8.
 */
asmlinkage void aesni_gcm_dec(void *ctx, u8 *out,
                        const u8 *in, unsigned long ciphertext_len, u8 *iv,
                        u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
                        u8 *auth_tag, unsigned long auth_tag_len);


#ifdef CONFIG_AS_AVX
/*
 * asmlinkage void aesni_gcm_precomp_avx_gen2()
 * gcm_data *my_ctx_data, context data
 * u8 *hash_subkey,  the Hash sub key input. Data starts on a 16-byte boundary.
 */
asmlinkage void aesni_gcm_precomp_avx_gen2(void *my_ctx_data, u8 *hash_subkey);

asmlinkage void aesni_gcm_enc_avx_gen2(void *ctx, u8 *out,
                        const u8 *in, unsigned long plaintext_len, u8 *iv,
                        const u8 *aad, unsigned long aad_len,
                        u8 *auth_tag, unsigned long auth_tag_len);

asmlinkage void aesni_gcm_dec_avx_gen2(void *ctx, u8 *out,
                        const u8 *in, unsigned long ciphertext_len, u8 *iv,
                        const u8 *aad, unsigned long aad_len,
                        u8 *auth_tag, unsigned long auth_tag_len);

static void aesni_gcm_enc_avx(void *ctx, u8 *out,
                        const u8 *in, unsigned long plaintext_len, u8 *iv,
                        u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
                        u8 *auth_tag, unsigned long auth_tag_len)
{
        if (plaintext_len < AVX_GEN2_OPTSIZE) {
                aesni_gcm_enc(ctx, out, in, plaintext_len, iv, hash_subkey, aad,
                                aad_len, auth_tag, auth_tag_len);
        } else {
                aesni_gcm_precomp_avx_gen2(ctx, hash_subkey);
                aesni_gcm_enc_avx_gen2(ctx, out, in, plaintext_len, iv, aad,
                                        aad_len, auth_tag, auth_tag_len);
        }
}

static void aesni_gcm_dec_avx(void *ctx, u8 *out,
                        const u8 *in, unsigned long ciphertext_len, u8 *iv,
                        u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
                        u8 *auth_tag, unsigned long auth_tag_len)
{
        if (ciphertext_len < AVX_GEN2_OPTSIZE) {
                aesni_gcm_dec(ctx, out, in, ciphertext_len, iv, hash_subkey, aad,
                                aad_len, auth_tag, auth_tag_len);
        } else {
                aesni_gcm_precomp_avx_gen2(ctx, hash_subkey);
                aesni_gcm_dec_avx_gen2(ctx, out, in, ciphertext_len, iv, aad,
                                        aad_len, auth_tag, auth_tag_len);
        }
}
#endif

#ifdef CONFIG_AS_AVX2
/*
 * asmlinkage void aesni_gcm_precomp_avx_gen4()
 * gcm_data *my_ctx_data, context data
 * u8 *hash_subkey,  the Hash sub key input. Data starts on a 16-byte boundary.
 */
asmlinkage void aesni_gcm_precomp_avx_gen4(void *my_ctx_data, u8 *hash_subkey);

asmlinkage void aesni_gcm_enc_avx_gen4(void *ctx, u8 *out,
                        const u8 *in, unsigned long plaintext_len, u8 *iv,
                        const u8 *aad, unsigned long aad_len,
                        u8 *auth_tag, unsigned long auth_tag_len);

asmlinkage void aesni_gcm_dec_avx_gen4(void *ctx, u8 *out,
                        const u8 *in, unsigned long ciphertext_len, u8 *iv,
                        const u8 *aad, unsigned long aad_len,
                        u8 *auth_tag, unsigned long auth_tag_len);

static void aesni_gcm_enc_avx2(void *ctx, u8 *out,
                        const u8 *in, unsigned long plaintext_len, u8 *iv,
                        u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
                        u8 *auth_tag, unsigned long auth_tag_len)
{
        if (plaintext_len < AVX_GEN2_OPTSIZE) {
                aesni_gcm_enc(ctx, out, in, plaintext_len, iv, hash_subkey, aad,
                                aad_len, auth_tag, auth_tag_len);
        } else if (plaintext_len < AVX_GEN4_OPTSIZE) {
                aesni_gcm_precomp_avx_gen2(ctx, hash_subkey);
                aesni_gcm_enc_avx_gen2(ctx, out, in, plaintext_len, iv, aad,
                                        aad_len, auth_tag, auth_tag_len);
        } else {
                aesni_gcm_precomp_avx_gen4(ctx, hash_subkey);
                aesni_gcm_enc_avx_gen4(ctx, out, in, plaintext_len, iv, aad,
                                        aad_len, auth_tag, auth_tag_len);
        }
}

static void aesni_gcm_dec_avx2(void *ctx, u8 *out,
                        const u8 *in, unsigned long ciphertext_len, u8 *iv,
                        u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
                        u8 *auth_tag, unsigned long auth_tag_len)
{
        if (ciphertext_len < AVX_GEN2_OPTSIZE) {
                aesni_gcm_dec(ctx, out, in, ciphertext_len, iv, hash_subkey,
                                aad, aad_len, auth_tag, auth_tag_len);
        } else if (ciphertext_len < AVX_GEN4_OPTSIZE) {
                aesni_gcm_precomp_avx_gen2(ctx, hash_subkey);
                aesni_gcm_dec_avx_gen2(ctx, out, in, ciphertext_len, iv, aad,
                                        aad_len, auth_tag, auth_tag_len);
        } else {
                aesni_gcm_precomp_avx_gen4(ctx, hash_subkey);
                aesni_gcm_dec_avx_gen4(ctx, out, in, ciphertext_len, iv, aad,
                                        aad_len, auth_tag, auth_tag_len);
        }
}
#endif

static void (*aesni_gcm_enc_tfm)(void *ctx, u8 *out,
                        const u8 *in, unsigned long plaintext_len, u8 *iv,
                        u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
                        u8 *auth_tag, unsigned long auth_tag_len);

static void (*aesni_gcm_dec_tfm)(void *ctx, u8 *out,
                        const u8 *in, unsigned long ciphertext_len, u8 *iv,
                        u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
                        u8 *auth_tag, unsigned long auth_tag_len);

static inline struct
aesni_rfc4106_gcm_ctx *aesni_rfc4106_gcm_ctx_get(struct crypto_aead *tfm)
{
        return
                (struct aesni_rfc4106_gcm_ctx *)
                PTR_ALIGN((u8 *)
                crypto_tfm_ctx(crypto_aead_tfm(tfm)), AESNI_ALIGN);
}
#endif

static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx)
{
        unsigned long addr = (unsigned long)raw_ctx;
        unsigned long align = AESNI_ALIGN;

        if (align <= crypto_tfm_ctx_alignment())
                align = 1;
        return (struct crypto_aes_ctx *)ALIGN(addr, align);
}

static int aes_set_key_common(struct crypto_tfm *tfm, void *raw_ctx,
                              const u8 *in_key, unsigned int key_len)
{
        struct crypto_aes_ctx *ctx = aes_ctx(raw_ctx);
        u32 *flags = &tfm->crt_flags;
        int err;

        if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 &&
            key_len != AES_KEYSIZE_256) {
                *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
                return -EINVAL;
        }

        if (!irq_fpu_usable())
                err = crypto_aes_expand_key(ctx, in_key, key_len);
        else {
                kernel_fpu_begin();
                err = aesni_set_key(ctx, in_key, key_len);
                kernel_fpu_end();
        }

        return err;
}

static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
                       unsigned int key_len)
{
        return aes_set_key_common(tfm, crypto_tfm_ctx(tfm), in_key, key_len);
}

static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
        struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));

        if (!irq_fpu_usable())
                crypto_aes_encrypt_x86(ctx, dst, src);
        else {
                kernel_fpu_begin();
                aesni_enc(ctx, dst, src);
                kernel_fpu_end();
        }
}

static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
        struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));

        if (!irq_fpu_usable())
                crypto_aes_decrypt_x86(ctx, dst, src);
        else {
                kernel_fpu_begin();
                aesni_dec(ctx, dst, src);
                kernel_fpu_end();
        }
}

static void __aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
        struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));

        aesni_enc(ctx, dst, src);
}

static void __aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
        struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));

        aesni_dec(ctx, dst, src);
}

static int ecb_encrypt(struct blkcipher_desc *desc,
                       struct scatterlist *dst, struct scatterlist *src,
                       unsigned int nbytes)
{
        struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
        struct blkcipher_walk walk;
        int err;

        blkcipher_walk_init(&walk, dst, src, nbytes);
        err = blkcipher_walk_virt(desc, &walk);
        desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

        kernel_fpu_begin();
        while ((nbytes = walk.nbytes)) {
                aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
                              nbytes & AES_BLOCK_MASK);
                nbytes &= AES_BLOCK_SIZE - 1;
                err = blkcipher_walk_done(desc, &walk, nbytes);
        }
        kernel_fpu_end();

        return err;
}

static int ecb_decrypt(struct blkcipher_desc *desc,
                       struct scatterlist *dst, struct scatterlist *src,
                       unsigned int nbytes)
{
        struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
        struct blkcipher_walk walk;
        int err;

        blkcipher_walk_init(&walk, dst, src, nbytes);
        err = blkcipher_walk_virt(desc, &walk);
        desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

        kernel_fpu_begin();
        while ((nbytes = walk.nbytes)) {
                aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
                              nbytes & AES_BLOCK_MASK);
                nbytes &= AES_BLOCK_SIZE - 1;
                err = blkcipher_walk_done(desc, &walk, nbytes);
        }
        kernel_fpu_end();

        return err;
}

static int cbc_encrypt(struct blkcipher_desc *desc,
                       struct scatterlist *dst, struct scatterlist *src,
                       unsigned int nbytes)
{
        struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
        struct blkcipher_walk walk;
        int err;

        blkcipher_walk_init(&walk, dst, src, nbytes);
        err = blkcipher_walk_virt(desc, &walk);
        desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

        kernel_fpu_begin();
        while ((nbytes = walk.nbytes)) {
                aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
                              nbytes & AES_BLOCK_MASK, walk.iv);
                nbytes &= AES_BLOCK_SIZE - 1;
                err = blkcipher_walk_done(desc, &walk, nbytes);
        }
        kernel_fpu_end();

        return err;
}

static int cbc_decrypt(struct blkcipher_desc *desc,
                       struct scatterlist *dst, struct scatterlist *src,
                       unsigned int nbytes)
{
        struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
        struct blkcipher_walk walk;
        int err;

        blkcipher_walk_init(&walk, dst, src, nbytes);
        err = blkcipher_walk_virt(desc, &walk);
        desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

        kernel_fpu_begin();
        while ((nbytes = walk.nbytes)) {
                aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
                              nbytes & AES_BLOCK_MASK, walk.iv);
                nbytes &= AES_BLOCK_SIZE - 1;
                err = blkcipher_walk_done(desc, &walk, nbytes);
        }
        kernel_fpu_end();

        return err;
}

#ifdef CONFIG_X86_64
static void ctr_crypt_final(struct crypto_aes_ctx *ctx,
                            struct blkcipher_walk *walk)
{
        u8 *ctrblk = walk->iv;
        u8 keystream[AES_BLOCK_SIZE];
        u8 *src = walk->src.virt.addr;
        u8 *dst = walk->dst.virt.addr;
        unsigned int nbytes = walk->nbytes;

        aesni_enc(ctx, keystream, ctrblk);
        crypto_xor(keystream, src, nbytes);
        memcpy(dst, keystream, nbytes);
        crypto_inc(ctrblk, AES_BLOCK_SIZE);
}

static int ctr_crypt(struct blkcipher_desc *desc,
                     struct scatterlist *dst, struct scatterlist *src,
                     unsigned int nbytes)
{
        struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
        struct blkcipher_walk walk;
        int err;

        blkcipher_walk_init(&walk, dst, src, nbytes);
        err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE);
        desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

        kernel_fpu_begin();
        while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
                aesni_ctr_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
                              nbytes & AES_BLOCK_MASK, walk.iv);
                nbytes &= AES_BLOCK_SIZE - 1;
                err = blkcipher_walk_done(desc, &walk, nbytes);
        }
        if (walk.nbytes) {
                ctr_crypt_final(ctx, &walk);
                err = blkcipher_walk_done(desc, &walk, 0);
        }
        kernel_fpu_end();

        return err;
}
#endif

static int ablk_ecb_init(struct crypto_tfm *tfm)
{
        return ablk_init_common(tfm, "__driver-ecb-aes-aesni");
}

static int ablk_cbc_init(struct crypto_tfm *tfm)
{
        return ablk_init_common(tfm, "__driver-cbc-aes-aesni");
}

#ifdef CONFIG_X86_64
static int ablk_ctr_init(struct crypto_tfm *tfm)
{
        return ablk_init_common(tfm, "__driver-ctr-aes-aesni");
}

#endif

#ifdef HAS_PCBC
static int ablk_pcbc_init(struct crypto_tfm *tfm)
{
        return ablk_init_common(tfm, "fpu(pcbc(__driver-aes-aesni))");
}
#endif

static void lrw_xts_encrypt_callback(void *ctx, u8 *blks, unsigned int nbytes)
{
        aesni_ecb_enc(ctx, blks, blks, nbytes);
}

static void lrw_xts_decrypt_callback(void *ctx, u8 *blks, unsigned int nbytes)
{
        aesni_ecb_dec(ctx, blks, blks, nbytes);
}

static int lrw_aesni_setkey(struct crypto_tfm *tfm, const u8 *key,
                            unsigned int keylen)
{
        struct aesni_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
        int err;

        err = aes_set_key_common(tfm, ctx->raw_aes_ctx, key,
                                 keylen - AES_BLOCK_SIZE);
        if (err)
                return err;

        return lrw_init_table(&ctx->lrw_table, key + keylen - AES_BLOCK_SIZE);
}

static void lrw_aesni_exit_tfm(struct crypto_tfm *tfm)
{
        struct aesni_lrw_ctx *ctx = crypto_tfm_ctx(tfm);

        lrw_free_table(&ctx->lrw_table);
}

static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
                       struct scatterlist *src, unsigned int nbytes)
{
        struct aesni_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
        be128 buf[8];
        struct lrw_crypt_req req = {
                .tbuf = buf,
                .tbuflen = sizeof(buf),

                .table_ctx = &ctx->lrw_table,
                .crypt_ctx = aes_ctx(ctx->raw_aes_ctx),
                .crypt_fn = lrw_xts_encrypt_callback,
        };
        int ret;

        desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

        kernel_fpu_begin();
        ret = lrw_crypt(desc, dst, src, nbytes, &req);
        kernel_fpu_end();

        return ret;
}

static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
                       struct scatterlist *src, unsigned int nbytes)
{
        struct aesni_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
        be128 buf[8];
        struct lrw_crypt_req req = {
                .tbuf = buf,
                .tbuflen = sizeof(buf),

                .table_ctx = &ctx->lrw_table,
                .crypt_ctx = aes_ctx(ctx->raw_aes_ctx),
                .crypt_fn = lrw_xts_decrypt_callback,
        };
        int ret;

        desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

        kernel_fpu_begin();
        ret = lrw_crypt(desc, dst, src, nbytes, &req);
        kernel_fpu_end();

        return ret;
}

static int xts_aesni_setkey(struct crypto_tfm *tfm, const u8 *key,
                            unsigned int keylen)
{
        struct aesni_xts_ctx *ctx = crypto_tfm_ctx(tfm);
        u32 *flags = &tfm->crt_flags;
        int err;

        /* key consists of keys of equal size concatenated, therefore
         * the length must be even
         */
        if (keylen % 2) {
                *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
                return -EINVAL;
        }

        /* first half of xts-key is for crypt */
        err = aes_set_key_common(tfm, ctx->raw_crypt_ctx, key, keylen / 2);
        if (err)
                return err;

        /* second half of xts-key is for tweak */
        return aes_set_key_common(tfm, ctx->raw_tweak_ctx, key + keylen / 2,
                                  keylen / 2);
}


static void aesni_xts_tweak(void *ctx, u8 *out, const u8 *in)
{
        aesni_enc(ctx, out, in);
}

#ifdef CONFIG_X86_64

static void aesni_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv)
{
        glue_xts_crypt_128bit_one(ctx, dst, src, iv, GLUE_FUNC_CAST(aesni_enc));
}

static void aesni_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv)
{
        glue_xts_crypt_128bit_one(ctx, dst, src, iv, GLUE_FUNC_CAST(aesni_dec));
}

static void aesni_xts_enc8(void *ctx, u128 *dst, const u128 *src, le128 *iv)
{
        aesni_xts_crypt8(ctx, (u8 *)dst, (const u8 *)src, true, (u8 *)iv);
}

static void aesni_xts_dec8(void *ctx, u128 *dst, const u128 *src, le128 *iv)
{
        aesni_xts_crypt8(ctx, (u8 *)dst, (const u8 *)src, false, (u8 *)iv);
}

static const struct common_glue_ctx aesni_enc_xts = {
        .num_funcs = 2,
        .fpu_blocks_limit = 1,

        .funcs = { {
                .num_blocks = 8,
                .fn_u = { .xts = GLUE_XTS_FUNC_CAST(aesni_xts_enc8) }
        }, {
                .num_blocks = 1,
                .fn_u = { .xts = GLUE_XTS_FUNC_CAST(aesni_xts_enc) }
        } }
};

static const struct common_glue_ctx aesni_dec_xts = {
        .num_funcs = 2,
        .fpu_blocks_limit = 1,

        .funcs = { {
                .num_blocks = 8,
                .fn_u = { .xts = GLUE_XTS_FUNC_CAST(aesni_xts_dec8) }
        }, {
                .num_blocks = 1,
                .fn_u = { .xts = GLUE_XTS_FUNC_CAST(aesni_xts_dec) }
        } }
};

static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
                       struct scatterlist *src, unsigned int nbytes)
{
        struct aesni_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);

        return glue_xts_crypt_128bit(&aesni_enc_xts, desc, dst, src, nbytes,
                                     XTS_TWEAK_CAST(aesni_xts_tweak),
                                     aes_ctx(ctx->raw_tweak_ctx),
                                     aes_ctx(ctx->raw_crypt_ctx));
}

static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
                       struct scatterlist *src, unsigned int nbytes)
{
        struct aesni_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);

        return glue_xts_crypt_128bit(&aesni_dec_xts, desc, dst, src, nbytes,
                                     XTS_TWEAK_CAST(aesni_xts_tweak),
                                     aes_ctx(ctx->raw_tweak_ctx),
                                     aes_ctx(ctx->raw_crypt_ctx));
}

#else

static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
                       struct scatterlist *src, unsigned int nbytes)
{
        struct aesni_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
        be128 buf[8];
        struct xts_crypt_req req = {
                .tbuf = buf,
                .tbuflen = sizeof(buf),

                .tweak_ctx = aes_ctx(ctx->raw_tweak_ctx),
                .tweak_fn = aesni_xts_tweak,
                .crypt_ctx = aes_ctx(ctx->raw_crypt_ctx),
                .crypt_fn = lrw_xts_encrypt_callback,
        };
        int ret;

        desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

        kernel_fpu_begin();
        ret = xts_crypt(desc, dst, src, nbytes, &req);
        kernel_fpu_end();

        return ret;
}

static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
                       struct scatterlist *src, unsigned int nbytes)
{
        struct aesni_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
        be128 buf[8];
        struct xts_crypt_req req = {
                .tbuf = buf,
                .tbuflen = sizeof(buf),

                .tweak_ctx = aes_ctx(ctx->raw_tweak_ctx),
                .tweak_fn = aesni_xts_tweak,
                .crypt_ctx = aes_ctx(ctx->raw_crypt_ctx),
                .crypt_fn = lrw_xts_decrypt_callback,
        };
        int ret;

        desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

        kernel_fpu_begin();
        ret = xts_crypt(desc, dst, src, nbytes, &req);
        kernel_fpu_end();

        return ret;
}

#endif

#ifdef CONFIG_X86_64
static int rfc4106_init(struct crypto_tfm *tfm)
{
        struct cryptd_aead *cryptd_tfm;
        struct aesni_rfc4106_gcm_ctx *ctx = (struct aesni_rfc4106_gcm_ctx *)
                PTR_ALIGN((u8 *)crypto_tfm_ctx(tfm), AESNI_ALIGN);
        struct crypto_aead *cryptd_child;
        struct aesni_rfc4106_gcm_ctx *child_ctx;
        cryptd_tfm = cryptd_alloc_aead("__driver-gcm-aes-aesni", 0, 0);
        if (IS_ERR(cryptd_tfm))
                return PTR_ERR(cryptd_tfm);

        cryptd_child = cryptd_aead_child(cryptd_tfm);
        child_ctx = aesni_rfc4106_gcm_ctx_get(cryptd_child);
        memcpy(child_ctx, ctx, sizeof(*ctx));
        ctx->cryptd_tfm = cryptd_tfm;
        tfm->crt_aead.reqsize = sizeof(struct aead_request)
                + crypto_aead_reqsize(&cryptd_tfm->base);
        return 0;
}

static void rfc4106_exit(struct crypto_tfm *tfm)
{
        struct aesni_rfc4106_gcm_ctx *ctx =
                (struct aesni_rfc4106_gcm_ctx *)
                PTR_ALIGN((u8 *)crypto_tfm_ctx(tfm), AESNI_ALIGN);
        if (!IS_ERR(ctx->cryptd_tfm))
                cryptd_free_aead(ctx->cryptd_tfm);
        return;
}

static void
rfc4106_set_hash_subkey_done(struct crypto_async_request *req, int err)
{
        struct aesni_gcm_set_hash_subkey_result *result = req->data;

        if (err == -EINPROGRESS)
                return;
        result->err = err;
        complete(&result->completion);
}

static int
rfc4106_set_hash_subkey(u8 *hash_subkey, const u8 *key, unsigned int key_len)
{
        struct crypto_ablkcipher *ctr_tfm;
        struct ablkcipher_request *req;
        int ret = -EINVAL;
        struct aesni_hash_subkey_req_data *req_data;

        ctr_tfm = crypto_alloc_ablkcipher("ctr(aes)", 0, 0);
        if (IS_ERR(ctr_tfm))
                return PTR_ERR(ctr_tfm);

        crypto_ablkcipher_clear_flags(ctr_tfm, ~0);

        ret = crypto_ablkcipher_setkey(ctr_tfm, key, key_len);
        if (ret)
                goto out_free_ablkcipher;

        ret = -ENOMEM;
        req = ablkcipher_request_alloc(ctr_tfm, GFP_KERNEL);
        if (!req)
                goto out_free_ablkcipher;

        req_data = kmalloc(sizeof(*req_data), GFP_KERNEL);
        if (!req_data)
                goto out_free_request;

        memset(req_data->iv, 0, sizeof(req_data->iv));

        /* Clear the data in the hash sub key container to zero.*/
        /* We want to cipher all zeros to create the hash sub key. */
        memset(hash_subkey, 0, RFC4106_HASH_SUBKEY_SIZE);

        init_completion(&req_data->result.completion);
        sg_init_one(&req_data->sg, hash_subkey, RFC4106_HASH_SUBKEY_SIZE);
        ablkcipher_request_set_tfm(req, ctr_tfm);
        ablkcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP |
                                        CRYPTO_TFM_REQ_MAY_BACKLOG,
                                        rfc4106_set_hash_subkey_done,
                                        &req_data->result);

        ablkcipher_request_set_crypt(req, &req_data->sg,
                &req_data->sg, RFC4106_HASH_SUBKEY_SIZE, req_data->iv);

        ret = crypto_ablkcipher_encrypt(req);
        if (ret == -EINPROGRESS || ret == -EBUSY) {
                ret = wait_for_completion_interruptible
                        (&req_data->result.completion);
                if (!ret)
                        ret = req_data->result.err;
        }
        kfree(req_data);
out_free_request:
        ablkcipher_request_free(req);
out_free_ablkcipher:
        crypto_free_ablkcipher(ctr_tfm);
        return ret;
}

static int rfc4106_set_key(struct crypto_aead *parent, const u8 *key,
                                                   unsigned int key_len)
{
        int ret = 0;
        struct crypto_tfm *tfm = crypto_aead_tfm(parent);
        struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(parent);
        struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm);
        struct aesni_rfc4106_gcm_ctx *child_ctx =
                                 aesni_rfc4106_gcm_ctx_get(cryptd_child);
        u8 *new_key_align, *new_key_mem = NULL;

        if (key_len < 4) {
                crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
                return -EINVAL;
        }
        /*Account for 4 byte nonce at the end.*/
        key_len -= 4;
        if (key_len != AES_KEYSIZE_128) {
                crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
                return -EINVAL;
        }

        memcpy(ctx->nonce, key + key_len, sizeof(ctx->nonce));
        /*This must be on a 16 byte boundary!*/
        if ((unsigned long)(&(ctx->aes_key_expanded.key_enc[0])) % AESNI_ALIGN)
                return -EINVAL;

        if ((unsigned long)key % AESNI_ALIGN) {
                /*key is not aligned: use an auxuliar aligned pointer*/
                new_key_mem = kmalloc(key_len+AESNI_ALIGN, GFP_KERNEL);
                if (!new_key_mem)
                        return -ENOMEM;

                new_key_align = PTR_ALIGN(new_key_mem, AESNI_ALIGN);
                memcpy(new_key_align, key, key_len);
                key = new_key_align;
        }

        if (!irq_fpu_usable())
                ret = crypto_aes_expand_key(&(ctx->aes_key_expanded),
                key, key_len);
        else {
                kernel_fpu_begin();
                ret = aesni_set_key(&(ctx->aes_key_expanded), key, key_len);
                kernel_fpu_end();
        }
        /*This must be on a 16 byte boundary!*/
        if ((unsigned long)(&(ctx->hash_subkey[0])) % AESNI_ALIGN) {
                ret = -EINVAL;
                goto exit;
        }
        ret = rfc4106_set_hash_subkey(ctx->hash_subkey, key, key_len);
        memcpy(child_ctx, ctx, sizeof(*ctx));
exit:
        kfree(new_key_mem);
        return ret;
}

/* This is the Integrity Check Value (aka the authentication tag length and can
 * be 8, 12 or 16 bytes long. */
static int rfc4106_set_authsize(struct crypto_aead *parent,
                                unsigned int authsize)
{
        struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(parent);
        struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm);

        switch (authsize) {
        case 8:
        case 12:
        case 16:
                break;
        default:
                return -EINVAL;
        }
        crypto_aead_crt(parent)->authsize = authsize;
        crypto_aead_crt(cryptd_child)->authsize = authsize;
        return 0;
}

static int rfc4106_encrypt(struct aead_request *req)
{
        int ret;
        struct crypto_aead *tfm = crypto_aead_reqtfm(req);
        struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);

        if (!irq_fpu_usable()) {
                struct aead_request *cryptd_req =
                        (struct aead_request *) aead_request_ctx(req);
                memcpy(cryptd_req, req, sizeof(*req));
                aead_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
                return crypto_aead_encrypt(cryptd_req);
        } else {
                struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm);
                kernel_fpu_begin();
                ret = cryptd_child->base.crt_aead.encrypt(req);
                kernel_fpu_end();
                return ret;
        }
}

static int rfc4106_decrypt(struct aead_request *req)
{
        int ret;
        struct crypto_aead *tfm = crypto_aead_reqtfm(req);
        struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);

        if (!irq_fpu_usable()) {
                struct aead_request *cryptd_req =
                        (struct aead_request *) aead_request_ctx(req);
                memcpy(cryptd_req, req, sizeof(*req));
                aead_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
                return crypto_aead_decrypt(cryptd_req);
        } else {
                struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm);
                kernel_fpu_begin();
                ret = cryptd_child->base.crt_aead.decrypt(req);
                kernel_fpu_end();
                return ret;
        }
}

static int __driver_rfc4106_encrypt(struct aead_request *req)
{
        u8 one_entry_in_sg = 0;
        u8 *src, *dst, *assoc;
        __be32 counter = cpu_to_be32(1);
        struct crypto_aead *tfm = crypto_aead_reqtfm(req);
        struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
        void *aes_ctx = &(ctx->aes_key_expanded);
        unsigned long auth_tag_len = crypto_aead_authsize(tfm);
        u8 iv_tab[16+AESNI_ALIGN];
        u8* iv = (u8 *) PTR_ALIGN((u8 *)iv_tab, AESNI_ALIGN);
        struct scatter_walk src_sg_walk;
        struct scatter_walk assoc_sg_walk;
        struct scatter_walk dst_sg_walk;
        unsigned int i;

        /* Assuming we are supporting rfc4106 64-bit extended */
        /* sequence numbers We need to have the AAD length equal */
        /* to 8 or 12 bytes */
        if (unlikely(req->assoclen != 8 && req->assoclen != 12))
                return -EINVAL;
        /* IV below built */
        for (i = 0; i < 4; i++)
                *(iv+i) = ctx->nonce[i];
        for (i = 0; i < 8; i++)
                *(iv+4+i) = req->iv[i];
        *((__be32 *)(iv+12)) = counter;

        if ((sg_is_last(req->src)) && (sg_is_last(req->assoc))) {
                one_entry_in_sg = 1;
                scatterwalk_start(&src_sg_walk, req->src);
                scatterwalk_start(&assoc_sg_walk, req->assoc);
                src = scatterwalk_map(&src_sg_walk);
                assoc = scatterwalk_map(&assoc_sg_walk);
                dst = src;
                if (unlikely(req->src != req->dst)) {
                        scatterwalk_start(&dst_sg_walk, req->dst);
                        dst = scatterwalk_map(&dst_sg_walk);
                }

        } else {
                /* Allocate memory for src, dst, assoc */
                src = kmalloc(req->cryptlen + auth_tag_len + req->assoclen,
                        GFP_ATOMIC);
                if (unlikely(!src))
                        return -ENOMEM;
                assoc = (src + req->cryptlen + auth_tag_len);
                scatterwalk_map_and_copy(src, req->src, 0, req->cryptlen, 0);
                scatterwalk_map_and_copy(assoc, req->assoc, 0,
                                        req->assoclen, 0);
                dst = src;
        }

        aesni_gcm_enc_tfm(aes_ctx, dst, src, (unsigned long)req->cryptlen, iv,
                ctx->hash_subkey, assoc, (unsigned long)req->assoclen, dst
                + ((unsigned long)req->cryptlen), auth_tag_len);

        /* The authTag (aka the Integrity Check Value) needs to be written
         * back to the packet. */
        if (one_entry_in_sg) {
                if (unlikely(req->src != req->dst)) {
                        scatterwalk_unmap(dst);
                        scatterwalk_done(&dst_sg_walk, 0, 0);
                }
                scatterwalk_unmap(src);
                scatterwalk_unmap(assoc);
                scatterwalk_done(&src_sg_walk, 0, 0);
                scatterwalk_done(&assoc_sg_walk, 0, 0);
        } else {
                scatterwalk_map_and_copy(dst, req->dst, 0,
                        req->cryptlen + auth_tag_len, 1);
                kfree(src);
        }
        return 0;
}

static int __driver_rfc4106_decrypt(struct aead_request *req)
{
        u8 one_entry_in_sg = 0;
        u8 *src, *dst, *assoc;
        unsigned long tempCipherLen = 0;
        __be32 counter = cpu_to_be32(1);
        int retval = 0;
        struct crypto_aead *tfm = crypto_aead_reqtfm(req);
        struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
        void *aes_ctx = &(ctx->aes_key_expanded);
        unsigned long auth_tag_len = crypto_aead_authsize(tfm);
        u8 iv_and_authTag[32+AESNI_ALIGN];
        u8 *iv = (u8 *) PTR_ALIGN((u8 *)iv_and_authTag, AESNI_ALIGN);
        u8 *authTag = iv + 16;
        struct scatter_walk src_sg_walk;
        struct scatter_walk assoc_sg_walk;
        struct scatter_walk dst_sg_walk;
        unsigned int i;

        if (unlikely((req->cryptlen < auth_tag_len) ||
                (req->assoclen != 8 && req->assoclen != 12)))
                return -EINVAL;
        /* Assuming we are supporting rfc4106 64-bit extended */
        /* sequence numbers We need to have the AAD length */
        /* equal to 8 or 12 bytes */

        tempCipherLen = (unsigned long)(req->cryptlen - auth_tag_len);
        /* IV below built */
        for (i = 0; i < 4; i++)
                *(iv+i) = ctx->nonce[i];
        for (i = 0; i < 8; i++)
                *(iv+4+i) = req->iv[i];
        *((__be32 *)(iv+12)) = counter;

        if ((sg_is_last(req->src)) && (sg_is_last(req->assoc))) {
                one_entry_in_sg = 1;
                scatterwalk_start(&src_sg_walk, req->src);
                scatterwalk_start(&assoc_sg_walk, req->assoc);
                src = scatterwalk_map(&src_sg_walk);
                assoc = scatterwalk_map(&assoc_sg_walk);
                dst = src;
                if (unlikely(req->src != req->dst)) {
                        scatterwalk_start(&dst_sg_walk, req->dst);
                        dst = scatterwalk_map(&dst_sg_walk);
                }

        } else {
                /* Allocate memory for src, dst, assoc */
                src = kmalloc(req->cryptlen + req->assoclen, GFP_ATOMIC);
                if (!src)
                        return -ENOMEM;
                assoc = (src + req->cryptlen + auth_tag_len);
                scatterwalk_map_and_copy(src, req->src, 0, req->cryptlen, 0);
                scatterwalk_map_and_copy(assoc, req->assoc, 0,
                        req->assoclen, 0);
                dst = src;
        }

        aesni_gcm_dec_tfm(aes_ctx, dst, src, tempCipherLen, iv,
                ctx->hash_subkey, assoc, (unsigned long)req->assoclen,
                authTag, auth_tag_len);

        /* Compare generated tag with passed in tag. */
        retval = crypto_memneq(src + tempCipherLen, authTag, auth_tag_len) ?
                -EBADMSG : 0;

        if (one_entry_in_sg) {
                if (unlikely(req->src != req->dst)) {
                        scatterwalk_unmap(dst);
                        scatterwalk_done(&dst_sg_walk, 0, 0);
                }
                scatterwalk_unmap(src);
                scatterwalk_unmap(assoc);
                scatterwalk_done(&src_sg_walk, 0, 0);
                scatterwalk_done(&assoc_sg_walk, 0, 0);
        } else {
                scatterwalk_map_and_copy(dst, req->dst, 0, req->cryptlen, 1);
                kfree(src);
        }
        return retval;
}
#endif

static struct crypto_alg aesni_algs[] = { {
        .cra_name               = "aes",
        .cra_driver_name        = "aes-aesni",
        .cra_priority           = 300,
        .cra_flags              = CRYPTO_ALG_TYPE_CIPHER,
        .cra_blocksize          = AES_BLOCK_SIZE,
        .cra_ctxsize            = sizeof(struct crypto_aes_ctx) +
                                  AESNI_ALIGN - 1,
        .cra_alignmask          = 0,
        .cra_module             = THIS_MODULE,
        .cra_u  = {
                .cipher = {
                        .cia_min_keysize        = AES_MIN_KEY_SIZE,
                        .cia_max_keysize        = AES_MAX_KEY_SIZE,
                        .cia_setkey             = aes_set_key,
                        .cia_encrypt            = aes_encrypt,
                        .cia_decrypt            = aes_decrypt
                }
        }
}, {
        .cra_name               = "__aes-aesni",
        .cra_driver_name        = "__driver-aes-aesni",
        .cra_priority           = 0,
        .cra_flags              = CRYPTO_ALG_TYPE_CIPHER,
        .cra_blocksize          = AES_BLOCK_SIZE,
        .cra_ctxsize            = sizeof(struct crypto_aes_ctx) +
                                  AESNI_ALIGN - 1,
        .cra_alignmask          = 0,
        .cra_module             = THIS_MODULE,
        .cra_u  = {
                .cipher = {
                        .cia_min_keysize        = AES_MIN_KEY_SIZE,
                        .cia_max_keysize        = AES_MAX_KEY_SIZE,
                        .cia_setkey             = aes_set_key,
                        .cia_encrypt            = __aes_encrypt,
                        .cia_decrypt            = __aes_decrypt
                }
        }
}, {
        .cra_name               = "__ecb-aes-aesni",
        .cra_driver_name        = "__driver-ecb-aes-aesni",
        .cra_priority           = 0,
        .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER,
        .cra_blocksize          = AES_BLOCK_SIZE,
        .cra_ctxsize            = sizeof(struct crypto_aes_ctx) +
                                  AESNI_ALIGN - 1,
        .cra_alignmask          = 0,
        .cra_type               = &crypto_blkcipher_type,
        .cra_module             = THIS_MODULE,
        .cra_u = {
                .blkcipher = {
                        .min_keysize    = AES_MIN_KEY_SIZE,
                        .max_keysize    = AES_MAX_KEY_SIZE,
                        .setkey         = aes_set_key,
                        .encrypt        = ecb_encrypt,
                        .decrypt        = ecb_decrypt,
                },
        },
}, {
        .cra_name               = "__cbc-aes-aesni",
        .cra_driver_name        = "__driver-cbc-aes-aesni",
        .cra_priority           = 0,
        .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER,
        .cra_blocksize          = AES_BLOCK_SIZE,
        .cra_ctxsize            = sizeof(struct crypto_aes_ctx) +
                                  AESNI_ALIGN - 1,
        .cra_alignmask          = 0,
        .cra_type               = &crypto_blkcipher_type,
        .cra_module             = THIS_MODULE,
        .cra_u = {
                .blkcipher = {
                        .min_keysize    = AES_MIN_KEY_SIZE,
                        .max_keysize    = AES_MAX_KEY_SIZE,
                        .setkey         = aes_set_key,
                        .encrypt        = cbc_encrypt,
                        .decrypt        = cbc_decrypt,
                },
        },
}, {
        .cra_name               = "ecb(aes)",
        .cra_driver_name        = "ecb-aes-aesni",
        .cra_priority           = 400,
        .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
        .cra_blocksize          = AES_BLOCK_SIZE,
        .cra_ctxsize            = sizeof(struct async_helper_ctx),
        .cra_alignmask          = 0,
        .cra_type               = &crypto_ablkcipher_type,
        .cra_module             = THIS_MODULE,
        .cra_init               = ablk_ecb_init,
        .cra_exit               = ablk_exit,
        .cra_u = {
                .ablkcipher = {
                        .min_keysize    = AES_MIN_KEY_SIZE,
                        .max_keysize    = AES_MAX_KEY_SIZE,
                        .setkey         = ablk_set_key,
                        .encrypt        = ablk_encrypt,
                        .decrypt        = ablk_decrypt,
                },
        },
}, {
        .cra_name               = "cbc(aes)",
        .cra_driver_name        = "cbc-aes-aesni",
        .cra_priority           = 400,
        .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
        .cra_blocksize          = AES_BLOCK_SIZE,
        .cra_ctxsize            = sizeof(struct async_helper_ctx),
        .cra_alignmask          = 0,
        .cra_type               = &crypto_ablkcipher_type,
        .cra_module             = THIS_MODULE,
        .cra_init               = ablk_cbc_init,
        .cra_exit               = ablk_exit,
        .cra_u = {
                .ablkcipher = {
                        .min_keysize    = AES_MIN_KEY_SIZE,
                        .max_keysize    = AES_MAX_KEY_SIZE,
                        .ivsize         = AES_BLOCK_SIZE,
                        .setkey         = ablk_set_key,
                        .encrypt        = ablk_encrypt,
                        .decrypt        = ablk_decrypt,
                },
        },
#ifdef CONFIG_X86_64
}, {
        .cra_name               = "__ctr-aes-aesni",
        .cra_driver_name        = "__driver-ctr-aes-aesni",
        .cra_priority           = 0,
        .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER,
        .cra_blocksize          = 1,
        .cra_ctxsize            = sizeof(struct crypto_aes_ctx) +
                                  AESNI_ALIGN - 1,
        .cra_alignmask          = 0,
        .cra_type               = &crypto_blkcipher_type,
        .cra_module             = THIS_MODULE,
        .cra_u = {
                .blkcipher = {
                        .min_keysize    = AES_MIN_KEY_SIZE,
                        .max_keysize    = AES_MAX_KEY_SIZE,
                        .ivsize         = AES_BLOCK_SIZE,
                        .setkey         = aes_set_key,
                        .encrypt        = ctr_crypt,
                        .decrypt        = ctr_crypt,
                },
        },
}, {
        .cra_name               = "ctr(aes)",
        .cra_driver_name        = "ctr-aes-aesni",
        .cra_priority           = 400,
        .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
        .cra_blocksize          = 1,
        .cra_ctxsize            = sizeof(struct async_helper_ctx),
        .cra_alignmask          = 0,
        .cra_type               = &crypto_ablkcipher_type,
        .cra_module             = THIS_MODULE,
        .cra_init               = ablk_ctr_init,
        .cra_exit               = ablk_exit,
        .cra_u = {
                .ablkcipher = {
                        .min_keysize    = AES_MIN_KEY_SIZE,
                        .max_keysize    = AES_MAX_KEY_SIZE,
                        .ivsize         = AES_BLOCK_SIZE,
                        .setkey         = ablk_set_key,
                        .encrypt        = ablk_encrypt,
                        .decrypt        = ablk_encrypt,
                        .geniv          = "chainiv",
                },
        },
}, {
        .cra_name               = "__gcm-aes-aesni",
        .cra_driver_name        = "__driver-gcm-aes-aesni",
        .cra_priority           = 0,
        .cra_flags              = CRYPTO_ALG_TYPE_AEAD,
        .cra_blocksize          = 1,
        .cra_ctxsize            = sizeof(struct aesni_rfc4106_gcm_ctx) +
                                  AESNI_ALIGN,
        .cra_alignmask          = 0,
        .cra_type               = &crypto_aead_type,
        .cra_module             = THIS_MODULE,
        .cra_u = {
                .aead = {
                        .encrypt        = __driver_rfc4106_encrypt,
                        .decrypt        = __driver_rfc4106_decrypt,
                },
        },
}, {
        .cra_name               = "rfc4106(gcm(aes))",
        .cra_driver_name        = "rfc4106-gcm-aesni",
        .cra_priority           = 400,
        .cra_flags              = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
        .cra_blocksize          = 1,
        .cra_ctxsize            = sizeof(struct aesni_rfc4106_gcm_ctx) +
                                  AESNI_ALIGN,
        .cra_alignmask          = 0,
        .cra_type               = &crypto_nivaead_type,
        .cra_module             = THIS_MODULE,
        .cra_init               = rfc4106_init,
        .cra_exit               = rfc4106_exit,
        .cra_u = {
                .aead = {
                        .setkey         = rfc4106_set_key,
                        .setauthsize    = rfc4106_set_authsize,
                        .encrypt        = rfc4106_encrypt,
                        .decrypt        = rfc4106_decrypt,
                        .geniv          = "seqiv",
                        .ivsize         = 8,
                        .maxauthsize    = 16,
                },
        },
#endif
#ifdef HAS_PCBC
}, {
        .cra_name               = "pcbc(aes)",
        .cra_driver_name        = "pcbc-aes-aesni",
        .cra_priority           = 400,
        .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
        .cra_blocksize          = AES_BLOCK_SIZE,
        .cra_ctxsize            = sizeof(struct async_helper_ctx),
        .cra_alignmask          = 0,
        .cra_type               = &crypto_ablkcipher_type,
        .cra_module             = THIS_MODULE,
        .cra_init               = ablk_pcbc_init,
        .cra_exit               = ablk_exit,
        .cra_u = {
                .ablkcipher = {
                        .min_keysize    = AES_MIN_KEY_SIZE,
                        .max_keysize    = AES_MAX_KEY_SIZE,
                        .ivsize         = AES_BLOCK_SIZE,
                        .setkey         = ablk_set_key,
                        .encrypt        = ablk_encrypt,
                        .decrypt        = ablk_decrypt,
                },
        },
#endif
}, {
        .cra_name               = "__lrw-aes-aesni",
        .cra_driver_name        = "__driver-lrw-aes-aesni",
        .cra_priority           = 0,
        .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER,
        .cra_blocksize          = AES_BLOCK_SIZE,
        .cra_ctxsize            = sizeof(struct aesni_lrw_ctx),
        .cra_alignmask          = 0,
        .cra_type               = &crypto_blkcipher_type,
        .cra_module             = THIS_MODULE,
        .cra_exit               = lrw_aesni_exit_tfm,
        .cra_u = {
                .blkcipher = {
                        .min_keysize    = AES_MIN_KEY_SIZE + AES_BLOCK_SIZE,
                        .max_keysize    = AES_MAX_KEY_SIZE + AES_BLOCK_SIZE,
                        .ivsize         = AES_BLOCK_SIZE,
                        .setkey         = lrw_aesni_setkey,
                        .encrypt        = lrw_encrypt,
                        .decrypt        = lrw_decrypt,
                },
        },
}, {
        .cra_name               = "__xts-aes-aesni",
        .cra_driver_name        = "__driver-xts-aes-aesni",
        .cra_priority           = 0,
        .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER,
        .cra_blocksize          = AES_BLOCK_SIZE,
        .cra_ctxsize            = sizeof(struct aesni_xts_ctx),
        .cra_alignmask          = 0,
        .cra_type               = &crypto_blkcipher_type,
        .cra_module             = THIS_MODULE,
        .cra_u = {
                .blkcipher = {
                        .min_keysize    = 2 * AES_MIN_KEY_SIZE,
                        .max_keysize    = 2 * AES_MAX_KEY_SIZE,
                        .ivsize         = AES_BLOCK_SIZE,
                        .setkey         = xts_aesni_setkey,
                        .encrypt        = xts_encrypt,
                        .decrypt        = xts_decrypt,
                },
        },
}, {
        .cra_name               = "lrw(aes)",
        .cra_driver_name        = "lrw-aes-aesni",
        .cra_priority           = 400,
        .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
        .cra_blocksize          = AES_BLOCK_SIZE,
        .cra_ctxsize            = sizeof(struct async_helper_ctx),
        .cra_alignmask          = 0,
        .cra_type               = &crypto_ablkcipher_type,
        .cra_module             = THIS_MODULE,
        .cra_init               = ablk_init,
        .cra_exit               = ablk_exit,
        .cra_u = {
                .ablkcipher = {
                        .min_keysize    = AES_MIN_KEY_SIZE + AES_BLOCK_SIZE,
                        .max_keysize    = AES_MAX_KEY_SIZE + AES_BLOCK_SIZE,
                        .ivsize         = AES_BLOCK_SIZE,
                        .setkey         = ablk_set_key,
                        .encrypt        = ablk_encrypt,
                        .decrypt        = ablk_decrypt,
                },
        },
}, {
        .cra_name               = "xts(aes)",
        .cra_driver_name        = "xts-aes-aesni",
        .cra_priority           = 400,
        .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
        .cra_blocksize          = AES_BLOCK_SIZE,
        .cra_ctxsize            = sizeof(struct async_helper_ctx),
        .cra_alignmask          = 0,
        .cra_type               = &crypto_ablkcipher_type,
        .cra_module             = THIS_MODULE,
        .cra_init               = ablk_init,
        .cra_exit               = ablk_exit,
        .cra_u = {
                .ablkcipher = {
                        .min_keysize    = 2 * AES_MIN_KEY_SIZE,
                        .max_keysize    = 2 * AES_MAX_KEY_SIZE,
                        .ivsize         = AES_BLOCK_SIZE,
                        .setkey         = ablk_set_key,
                        .encrypt        = ablk_encrypt,
                        .decrypt        = ablk_decrypt,
                },
        },
} };


static const struct x86_cpu_id aesni_cpu_id[] = {
        X86_FEATURE_MATCH(X86_FEATURE_AES),
        {}
};
MODULE_DEVICE_TABLE(x86cpu, aesni_cpu_id);

static int __init aesni_init(void)
{
        int err;

        if (!x86_match_cpu(aesni_cpu_id))
                return -ENODEV;
#ifdef CONFIG_X86_64
#ifdef CONFIG_AS_AVX2
        if (boot_cpu_has(X86_FEATURE_AVX2)) {
                pr_info("AVX2 version of gcm_enc/dec engaged.\n");
                aesni_gcm_enc_tfm = aesni_gcm_enc_avx2;
                aesni_gcm_dec_tfm = aesni_gcm_dec_avx2;
        } else
#endif
#ifdef CONFIG_AS_AVX
        if (boot_cpu_has(X86_FEATURE_AVX)) {
                pr_info("AVX version of gcm_enc/dec engaged.\n");
                aesni_gcm_enc_tfm = aesni_gcm_enc_avx;
                aesni_gcm_dec_tfm = aesni_gcm_dec_avx;
        } else
#endif
        {
                pr_info("SSE version of gcm_enc/dec engaged.\n");
                aesni_gcm_enc_tfm = aesni_gcm_enc;
                aesni_gcm_dec_tfm = aesni_gcm_dec;
        }
#endif

        err = crypto_fpu_init();
        if (err)
                return err;

        return crypto_register_algs(aesni_algs, ARRAY_SIZE(aesni_algs));
}

static void __exit aesni_exit(void)
{
        crypto_unregister_algs(aesni_algs, ARRAY_SIZE(aesni_algs));

        crypto_fpu_exit();
}

module_init(aesni_init);
module_exit(aesni_exit);

MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, Intel AES-NI instructions optimized");
MODULE_LICENSE("GPL");
MODULE_ALIAS("aes");