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-rw-r--r--arch/x86/crypto/blowfish_avx2_glue.c585
1 files changed, 585 insertions, 0 deletions
diff --git a/arch/x86/crypto/blowfish_avx2_glue.c b/arch/x86/crypto/blowfish_avx2_glue.c
new file mode 100644
index 000000000000..4417e9aea78d
--- /dev/null
+++ b/arch/x86/crypto/blowfish_avx2_glue.c
@@ -0,0 +1,585 @@
+/*
+ * Glue Code for x86_64/AVX2 assembler optimized version of Blowfish
+ *
+ * Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
+ *
+ * CBC & ECB parts based on code (crypto/cbc.c,ecb.c) by:
+ * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
+ * CTR part based on code (crypto/ctr.c) by:
+ * (C) Copyright IBM Corp. 2007 - Joy Latten <latten@us.ibm.com>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/crypto.h>
+#include <linux/err.h>
+#include <crypto/algapi.h>
+#include <crypto/blowfish.h>
+#include <crypto/cryptd.h>
+#include <crypto/ctr.h>
+#include <asm/i387.h>
+#include <asm/xcr.h>
+#include <asm/xsave.h>
+#include <asm/crypto/blowfish.h>
+#include <asm/crypto/ablk_helper.h>
+#include <crypto/scatterwalk.h>
+
+#define BF_AVX2_PARALLEL_BLOCKS 32
+
+/* 32-way AVX2 parallel cipher functions */
+asmlinkage void blowfish_ecb_enc_32way(struct bf_ctx *ctx, u8 *dst,
+ const u8 *src);
+asmlinkage void blowfish_ecb_dec_32way(struct bf_ctx *ctx, u8 *dst,
+ const u8 *src);
+asmlinkage void blowfish_cbc_dec_32way(struct bf_ctx *ctx, u8 *dst,
+ const u8 *src);
+asmlinkage void blowfish_ctr_32way(struct bf_ctx *ctx, u8 *dst, const u8 *src,
+ __be64 *iv);
+
+static inline bool bf_fpu_begin(bool fpu_enabled, unsigned int nbytes)
+{
+ if (fpu_enabled)
+ return true;
+
+ /* FPU is only used when chunk to be processed is large enough, so
+ * do not enable FPU until it is necessary.
+ */
+ if (nbytes < BF_BLOCK_SIZE * BF_AVX2_PARALLEL_BLOCKS)
+ return false;
+
+ kernel_fpu_begin();
+ return true;
+}
+
+static inline void bf_fpu_end(bool fpu_enabled)
+{
+ if (fpu_enabled)
+ kernel_fpu_end();
+}
+
+static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk,
+ bool enc)
+{
+ bool fpu_enabled = false;
+ struct bf_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ const unsigned int bsize = BF_BLOCK_SIZE;
+ unsigned int nbytes;
+ int err;
+
+ err = blkcipher_walk_virt(desc, walk);
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ while ((nbytes = walk->nbytes)) {
+ u8 *wsrc = walk->src.virt.addr;
+ u8 *wdst = walk->dst.virt.addr;
+
+ fpu_enabled = bf_fpu_begin(fpu_enabled, nbytes);
+
+ /* Process multi-block AVX2 batch */
+ if (nbytes >= bsize * BF_AVX2_PARALLEL_BLOCKS) {
+ do {
+ if (enc)
+ blowfish_ecb_enc_32way(ctx, wdst, wsrc);
+ else
+ blowfish_ecb_dec_32way(ctx, wdst, wsrc);
+
+ wsrc += bsize * BF_AVX2_PARALLEL_BLOCKS;
+ wdst += bsize * BF_AVX2_PARALLEL_BLOCKS;
+ nbytes -= bsize * BF_AVX2_PARALLEL_BLOCKS;
+ } while (nbytes >= bsize * BF_AVX2_PARALLEL_BLOCKS);
+
+ if (nbytes < bsize)
+ goto done;
+ }
+
+ /* Process multi-block batch */
+ if (nbytes >= bsize * BF_PARALLEL_BLOCKS) {
+ do {
+ if (enc)
+ blowfish_enc_blk_4way(ctx, wdst, wsrc);
+ else
+ blowfish_dec_blk_4way(ctx, wdst, wsrc);
+
+ wsrc += bsize * BF_PARALLEL_BLOCKS;
+ wdst += bsize * BF_PARALLEL_BLOCKS;
+ nbytes -= bsize * BF_PARALLEL_BLOCKS;
+ } while (nbytes >= bsize * BF_PARALLEL_BLOCKS);
+
+ if (nbytes < bsize)
+ goto done;
+ }
+
+ /* Handle leftovers */
+ do {
+ if (enc)
+ blowfish_enc_blk(ctx, wdst, wsrc);
+ else
+ blowfish_dec_blk(ctx, wdst, wsrc);
+
+ wsrc += bsize;
+ wdst += bsize;
+ nbytes -= bsize;
+ } while (nbytes >= bsize);
+
+done:
+ err = blkcipher_walk_done(desc, walk, nbytes);
+ }
+
+ bf_fpu_end(fpu_enabled);
+ return err;
+}
+
+static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ struct blkcipher_walk walk;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ return ecb_crypt(desc, &walk, true);
+}
+
+static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ struct blkcipher_walk walk;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ return ecb_crypt(desc, &walk, false);
+}
+
+static unsigned int __cbc_encrypt(struct blkcipher_desc *desc,
+ struct blkcipher_walk *walk)
+{
+ struct bf_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ unsigned int bsize = BF_BLOCK_SIZE;
+ unsigned int nbytes = walk->nbytes;
+ u64 *src = (u64 *)walk->src.virt.addr;
+ u64 *dst = (u64 *)walk->dst.virt.addr;
+ u64 *iv = (u64 *)walk->iv;
+
+ do {
+ *dst = *src ^ *iv;
+ blowfish_enc_blk(ctx, (u8 *)dst, (u8 *)dst);
+ iv = dst;
+
+ src += 1;
+ dst += 1;
+ nbytes -= bsize;
+ } while (nbytes >= bsize);
+
+ *(u64 *)walk->iv = *iv;
+ return nbytes;
+}
+
+static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ struct blkcipher_walk walk;
+ int err;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ err = blkcipher_walk_virt(desc, &walk);
+
+ while ((nbytes = walk.nbytes)) {
+ nbytes = __cbc_encrypt(desc, &walk);
+ err = blkcipher_walk_done(desc, &walk, nbytes);
+ }
+
+ return err;
+}
+
+static unsigned int __cbc_decrypt(struct blkcipher_desc *desc,
+ struct blkcipher_walk *walk)
+{
+ struct bf_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ const unsigned int bsize = BF_BLOCK_SIZE;
+ unsigned int nbytes = walk->nbytes;
+ u64 *src = (u64 *)walk->src.virt.addr;
+ u64 *dst = (u64 *)walk->dst.virt.addr;
+ u64 last_iv;
+ int i;
+
+ /* Start of the last block. */
+ src += nbytes / bsize - 1;
+ dst += nbytes / bsize - 1;
+
+ last_iv = *src;
+
+ /* Process multi-block AVX2 batch */
+ if (nbytes >= bsize * BF_AVX2_PARALLEL_BLOCKS) {
+ do {
+ nbytes -= bsize * (BF_AVX2_PARALLEL_BLOCKS - 1);
+ src -= BF_AVX2_PARALLEL_BLOCKS - 1;
+ dst -= BF_AVX2_PARALLEL_BLOCKS - 1;
+
+ blowfish_cbc_dec_32way(ctx, (u8 *)dst, (u8 *)src);
+
+ nbytes -= bsize;
+ if (nbytes < bsize)
+ goto done;
+
+ *dst ^= *(src - 1);
+ src -= 1;
+ dst -= 1;
+ } while (nbytes >= bsize * BF_AVX2_PARALLEL_BLOCKS);
+
+ if (nbytes < bsize)
+ goto done;
+ }
+
+ /* Process multi-block batch */
+ if (nbytes >= bsize * BF_PARALLEL_BLOCKS) {
+ u64 ivs[BF_PARALLEL_BLOCKS - 1];
+
+ do {
+ nbytes -= bsize * (BF_PARALLEL_BLOCKS - 1);
+ src -= BF_PARALLEL_BLOCKS - 1;
+ dst -= BF_PARALLEL_BLOCKS - 1;
+
+ for (i = 0; i < BF_PARALLEL_BLOCKS - 1; i++)
+ ivs[i] = src[i];
+
+ blowfish_dec_blk_4way(ctx, (u8 *)dst, (u8 *)src);
+
+ for (i = 0; i < BF_PARALLEL_BLOCKS - 1; i++)
+ dst[i + 1] ^= ivs[i];
+
+ nbytes -= bsize;
+ if (nbytes < bsize)
+ goto done;
+
+ *dst ^= *(src - 1);
+ src -= 1;
+ dst -= 1;
+ } while (nbytes >= bsize * BF_PARALLEL_BLOCKS);
+
+ if (nbytes < bsize)
+ goto done;
+ }
+
+ /* Handle leftovers */
+ for (;;) {
+ blowfish_dec_blk(ctx, (u8 *)dst, (u8 *)src);
+
+ nbytes -= bsize;
+ if (nbytes < bsize)
+ break;
+
+ *dst ^= *(src - 1);
+ src -= 1;
+ dst -= 1;
+ }
+
+done:
+ *dst ^= *(u64 *)walk->iv;
+ *(u64 *)walk->iv = last_iv;
+
+ return nbytes;
+}
+
+static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ bool fpu_enabled = false;
+ 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;
+
+ while ((nbytes = walk.nbytes)) {
+ fpu_enabled = bf_fpu_begin(fpu_enabled, nbytes);
+ nbytes = __cbc_decrypt(desc, &walk);
+ err = blkcipher_walk_done(desc, &walk, nbytes);
+ }
+
+ bf_fpu_end(fpu_enabled);
+ return err;
+}
+
+static void ctr_crypt_final(struct blkcipher_desc *desc,
+ struct blkcipher_walk *walk)
+{
+ struct bf_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ u8 *ctrblk = walk->iv;
+ u8 keystream[BF_BLOCK_SIZE];
+ u8 *src = walk->src.virt.addr;
+ u8 *dst = walk->dst.virt.addr;
+ unsigned int nbytes = walk->nbytes;
+
+ blowfish_enc_blk(ctx, keystream, ctrblk);
+ crypto_xor(keystream, src, nbytes);
+ memcpy(dst, keystream, nbytes);
+
+ crypto_inc(ctrblk, BF_BLOCK_SIZE);
+}
+
+static unsigned int __ctr_crypt(struct blkcipher_desc *desc,
+ struct blkcipher_walk *walk)
+{
+ struct bf_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ unsigned int bsize = BF_BLOCK_SIZE;
+ unsigned int nbytes = walk->nbytes;
+ u64 *src = (u64 *)walk->src.virt.addr;
+ u64 *dst = (u64 *)walk->dst.virt.addr;
+ int i;
+
+ /* Process multi-block AVX2 batch */
+ if (nbytes >= bsize * BF_AVX2_PARALLEL_BLOCKS) {
+ do {
+ blowfish_ctr_32way(ctx, (u8 *)dst, (u8 *)src,
+ (__be64 *)walk->iv);
+
+ src += BF_AVX2_PARALLEL_BLOCKS;
+ dst += BF_AVX2_PARALLEL_BLOCKS;
+ nbytes -= bsize * BF_AVX2_PARALLEL_BLOCKS;
+ } while (nbytes >= bsize * BF_AVX2_PARALLEL_BLOCKS);
+
+ if (nbytes < bsize)
+ goto done;
+ }
+
+ /* Process four block batch */
+ if (nbytes >= bsize * BF_PARALLEL_BLOCKS) {
+ __be64 ctrblocks[BF_PARALLEL_BLOCKS];
+ u64 ctrblk = be64_to_cpu(*(__be64 *)walk->iv);
+
+ do {
+ /* create ctrblks for parallel encrypt */
+ for (i = 0; i < BF_PARALLEL_BLOCKS; i++) {
+ if (dst != src)
+ dst[i] = src[i];
+
+ ctrblocks[i] = cpu_to_be64(ctrblk++);
+ }
+
+ blowfish_enc_blk_xor_4way(ctx, (u8 *)dst,
+ (u8 *)ctrblocks);
+
+ src += BF_PARALLEL_BLOCKS;
+ dst += BF_PARALLEL_BLOCKS;
+ nbytes -= bsize * BF_PARALLEL_BLOCKS;
+ } while (nbytes >= bsize * BF_PARALLEL_BLOCKS);
+
+ *(__be64 *)walk->iv = cpu_to_be64(ctrblk);
+
+ if (nbytes < bsize)
+ goto done;
+ }
+
+ /* Handle leftovers */
+ do {
+ u64 ctrblk;
+
+ if (dst != src)
+ *dst = *src;
+
+ ctrblk = *(u64 *)walk->iv;
+ be64_add_cpu((__be64 *)walk->iv, 1);
+
+ blowfish_enc_blk_xor(ctx, (u8 *)dst, (u8 *)&ctrblk);
+
+ src += 1;
+ dst += 1;
+ } while ((nbytes -= bsize) >= bsize);
+
+done:
+ return nbytes;
+}
+
+static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ bool fpu_enabled = false;
+ struct blkcipher_walk walk;
+ int err;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ err = blkcipher_walk_virt_block(desc, &walk, BF_BLOCK_SIZE);
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ while ((nbytes = walk.nbytes) >= BF_BLOCK_SIZE) {
+ fpu_enabled = bf_fpu_begin(fpu_enabled, nbytes);
+ nbytes = __ctr_crypt(desc, &walk);
+ err = blkcipher_walk_done(desc, &walk, nbytes);
+ }
+
+ bf_fpu_end(fpu_enabled);
+
+ if (walk.nbytes) {
+ ctr_crypt_final(desc, &walk);
+ err = blkcipher_walk_done(desc, &walk, 0);
+ }
+
+ return err;
+}
+
+static struct crypto_alg bf_algs[6] = { {
+ .cra_name = "__ecb-blowfish-avx2",
+ .cra_driver_name = "__driver-ecb-blowfish-avx2",
+ .cra_priority = 0,
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
+ .cra_blocksize = BF_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct bf_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = BF_MIN_KEY_SIZE,
+ .max_keysize = BF_MAX_KEY_SIZE,
+ .setkey = blowfish_setkey,
+ .encrypt = ecb_encrypt,
+ .decrypt = ecb_decrypt,
+ },
+ },
+}, {
+ .cra_name = "__cbc-blowfish-avx2",
+ .cra_driver_name = "__driver-cbc-blowfish-avx2",
+ .cra_priority = 0,
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
+ .cra_blocksize = BF_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct bf_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = BF_MIN_KEY_SIZE,
+ .max_keysize = BF_MAX_KEY_SIZE,
+ .setkey = blowfish_setkey,
+ .encrypt = cbc_encrypt,
+ .decrypt = cbc_decrypt,
+ },
+ },
+}, {
+ .cra_name = "__ctr-blowfish-avx2",
+ .cra_driver_name = "__driver-ctr-blowfish-avx2",
+ .cra_priority = 0,
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct bf_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = BF_MIN_KEY_SIZE,
+ .max_keysize = BF_MAX_KEY_SIZE,
+ .ivsize = BF_BLOCK_SIZE,
+ .setkey = blowfish_setkey,
+ .encrypt = ctr_crypt,
+ .decrypt = ctr_crypt,
+ },
+ },
+}, {
+ .cra_name = "ecb(blowfish)",
+ .cra_driver_name = "ecb-blowfish-avx2",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = BF_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 = BF_MIN_KEY_SIZE,
+ .max_keysize = BF_MAX_KEY_SIZE,
+ .setkey = ablk_set_key,
+ .encrypt = ablk_encrypt,
+ .decrypt = ablk_decrypt,
+ },
+ },
+}, {
+ .cra_name = "cbc(blowfish)",
+ .cra_driver_name = "cbc-blowfish-avx2",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = BF_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 = BF_MIN_KEY_SIZE,
+ .max_keysize = BF_MAX_KEY_SIZE,
+ .ivsize = BF_BLOCK_SIZE,
+ .setkey = ablk_set_key,
+ .encrypt = __ablk_encrypt,
+ .decrypt = ablk_decrypt,
+ },
+ },
+}, {
+ .cra_name = "ctr(blowfish)",
+ .cra_driver_name = "ctr-blowfish-avx2",
+ .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_init,
+ .cra_exit = ablk_exit,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = BF_MIN_KEY_SIZE,
+ .max_keysize = BF_MAX_KEY_SIZE,
+ .ivsize = BF_BLOCK_SIZE,
+ .setkey = ablk_set_key,
+ .encrypt = ablk_encrypt,
+ .decrypt = ablk_encrypt,
+ .geniv = "chainiv",
+ },
+ },
+} };
+
+
+static int __init init(void)
+{
+ u64 xcr0;
+
+ if (!cpu_has_avx2 || !cpu_has_osxsave) {
+ pr_info("AVX2 instructions are not detected.\n");
+ return -ENODEV;
+ }
+
+ xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK);
+ if ((xcr0 & (XSTATE_SSE | XSTATE_YMM)) != (XSTATE_SSE | XSTATE_YMM)) {
+ pr_info("AVX detected but unusable.\n");
+ return -ENODEV;
+ }
+
+ return crypto_register_algs(bf_algs, ARRAY_SIZE(bf_algs));
+}
+
+static void __exit fini(void)
+{
+ crypto_unregister_algs(bf_algs, ARRAY_SIZE(bf_algs));
+}
+
+module_init(init);
+module_exit(fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Blowfish Cipher Algorithm, AVX2 optimized");
+MODULE_ALIAS("blowfish");
+MODULE_ALIAS("blowfish-asm");
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-26 20:29:09 +0000