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Diffstat (limited to 'arch/loongarch/crypto/crc32-loongarch.c')
-rw-r--r--arch/loongarch/crypto/crc32-loongarch.c300
1 files changed, 0 insertions, 300 deletions
diff --git a/arch/loongarch/crypto/crc32-loongarch.c b/arch/loongarch/crypto/crc32-loongarch.c
deleted file mode 100644
index 3eebea3a7b47..000000000000
--- a/arch/loongarch/crypto/crc32-loongarch.c
+++ /dev/null
@@ -1,300 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * crc32.c - CRC32 and CRC32C using LoongArch crc* instructions
- *
- * Module based on mips/crypto/crc32-mips.c
- *
- * Copyright (C) 2014 Linaro Ltd <yazen.ghannam@linaro.org>
- * Copyright (C) 2018 MIPS Tech, LLC
- * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
- */
-
-#include <linux/module.h>
-#include <crypto/internal/hash.h>
-
-#include <asm/cpu-features.h>
-#include <asm/unaligned.h>
-
-#define _CRC32(crc, value, size, type) \
-do { \
- __asm__ __volatile__( \
- #type ".w." #size ".w" " %0, %1, %0\n\t"\
- : "+r" (crc) \
- : "r" (value) \
- : "memory"); \
-} while (0)
-
-#define CRC32(crc, value, size) _CRC32(crc, value, size, crc)
-#define CRC32C(crc, value, size) _CRC32(crc, value, size, crcc)
-
-static u32 crc32_loongarch_hw(u32 crc_, const u8 *p, unsigned int len)
-{
- u32 crc = crc_;
-
- while (len >= sizeof(u64)) {
- u64 value = get_unaligned_le64(p);
-
- CRC32(crc, value, d);
- p += sizeof(u64);
- len -= sizeof(u64);
- }
-
- if (len & sizeof(u32)) {
- u32 value = get_unaligned_le32(p);
-
- CRC32(crc, value, w);
- p += sizeof(u32);
- }
-
- if (len & sizeof(u16)) {
- u16 value = get_unaligned_le16(p);
-
- CRC32(crc, value, h);
- p += sizeof(u16);
- }
-
- if (len & sizeof(u8)) {
- u8 value = *p++;
-
- CRC32(crc, value, b);
- }
-
- return crc;
-}
-
-static u32 crc32c_loongarch_hw(u32 crc_, const u8 *p, unsigned int len)
-{
- u32 crc = crc_;
-
- while (len >= sizeof(u64)) {
- u64 value = get_unaligned_le64(p);
-
- CRC32C(crc, value, d);
- p += sizeof(u64);
- len -= sizeof(u64);
- }
-
- if (len & sizeof(u32)) {
- u32 value = get_unaligned_le32(p);
-
- CRC32C(crc, value, w);
- p += sizeof(u32);
- }
-
- if (len & sizeof(u16)) {
- u16 value = get_unaligned_le16(p);
-
- CRC32C(crc, value, h);
- p += sizeof(u16);
- }
-
- if (len & sizeof(u8)) {
- u8 value = *p++;
-
- CRC32C(crc, value, b);
- }
-
- return crc;
-}
-
-#define CHKSUM_BLOCK_SIZE 1
-#define CHKSUM_DIGEST_SIZE 4
-
-struct chksum_ctx {
- u32 key;
-};
-
-struct chksum_desc_ctx {
- u32 crc;
-};
-
-static int chksum_init(struct shash_desc *desc)
-{
- struct chksum_ctx *mctx = crypto_shash_ctx(desc->tfm);
- struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
-
- ctx->crc = mctx->key;
-
- return 0;
-}
-
-/*
- * Setting the seed allows arbitrary accumulators and flexible XOR policy
- * If your algorithm starts with ~0, then XOR with ~0 before you set the seed.
- */
-static int chksum_setkey(struct crypto_shash *tfm, const u8 *key, unsigned int keylen)
-{
- struct chksum_ctx *mctx = crypto_shash_ctx(tfm);
-
- if (keylen != sizeof(mctx->key))
- return -EINVAL;
-
- mctx->key = get_unaligned_le32(key);
-
- return 0;
-}
-
-static int chksum_update(struct shash_desc *desc, const u8 *data, unsigned int length)
-{
- struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
-
- ctx->crc = crc32_loongarch_hw(ctx->crc, data, length);
- return 0;
-}
-
-static int chksumc_update(struct shash_desc *desc, const u8 *data, unsigned int length)
-{
- struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
-
- ctx->crc = crc32c_loongarch_hw(ctx->crc, data, length);
- return 0;
-}
-
-static int chksum_final(struct shash_desc *desc, u8 *out)
-{
- struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
-
- put_unaligned_le32(ctx->crc, out);
- return 0;
-}
-
-static int chksumc_final(struct shash_desc *desc, u8 *out)
-{
- struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
-
- put_unaligned_le32(~ctx->crc, out);
- return 0;
-}
-
-static int __chksum_finup(u32 crc, const u8 *data, unsigned int len, u8 *out)
-{
- put_unaligned_le32(crc32_loongarch_hw(crc, data, len), out);
- return 0;
-}
-
-static int __chksumc_finup(u32 crc, const u8 *data, unsigned int len, u8 *out)
-{
- put_unaligned_le32(~crc32c_loongarch_hw(crc, data, len), out);
- return 0;
-}
-
-static int chksum_finup(struct shash_desc *desc, const u8 *data, unsigned int len, u8 *out)
-{
- struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
-
- return __chksum_finup(ctx->crc, data, len, out);
-}
-
-static int chksumc_finup(struct shash_desc *desc, const u8 *data, unsigned int len, u8 *out)
-{
- struct chksum_desc_ctx *ctx = shash_desc_ctx(desc);
-
- return __chksumc_finup(ctx->crc, data, len, out);
-}
-
-static int chksum_digest(struct shash_desc *desc, const u8 *data, unsigned int length, u8 *out)
-{
- struct chksum_ctx *mctx = crypto_shash_ctx(desc->tfm);
-
- return __chksum_finup(mctx->key, data, length, out);
-}
-
-static int chksumc_digest(struct shash_desc *desc, const u8 *data, unsigned int length, u8 *out)
-{
- struct chksum_ctx *mctx = crypto_shash_ctx(desc->tfm);
-
- return __chksumc_finup(mctx->key, data, length, out);
-}
-
-static int chksum_cra_init(struct crypto_tfm *tfm)
-{
- struct chksum_ctx *mctx = crypto_tfm_ctx(tfm);
-
- mctx->key = 0;
- return 0;
-}
-
-static int chksumc_cra_init(struct crypto_tfm *tfm)
-{
- struct chksum_ctx *mctx = crypto_tfm_ctx(tfm);
-
- mctx->key = ~0;
- return 0;
-}
-
-static struct shash_alg crc32_alg = {
- .digestsize = CHKSUM_DIGEST_SIZE,
- .setkey = chksum_setkey,
- .init = chksum_init,
- .update = chksum_update,
- .final = chksum_final,
- .finup = chksum_finup,
- .digest = chksum_digest,
- .descsize = sizeof(struct chksum_desc_ctx),
- .base = {
- .cra_name = "crc32",
- .cra_driver_name = "crc32-loongarch",
- .cra_priority = 300,
- .cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
- .cra_blocksize = CHKSUM_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct chksum_ctx),
- .cra_module = THIS_MODULE,
- .cra_init = chksum_cra_init,
- }
-};
-
-static struct shash_alg crc32c_alg = {
- .digestsize = CHKSUM_DIGEST_SIZE,
- .setkey = chksum_setkey,
- .init = chksum_init,
- .update = chksumc_update,
- .final = chksumc_final,
- .finup = chksumc_finup,
- .digest = chksumc_digest,
- .descsize = sizeof(struct chksum_desc_ctx),
- .base = {
- .cra_name = "crc32c",
- .cra_driver_name = "crc32c-loongarch",
- .cra_priority = 300,
- .cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
- .cra_blocksize = CHKSUM_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct chksum_ctx),
- .cra_module = THIS_MODULE,
- .cra_init = chksumc_cra_init,
- }
-};
-
-static int __init crc32_mod_init(void)
-{
- int err;
-
- if (!cpu_has(CPU_FEATURE_CRC32))
- return 0;
-
- err = crypto_register_shash(&crc32_alg);
- if (err)
- return err;
-
- err = crypto_register_shash(&crc32c_alg);
- if (err)
- return err;
-
- return 0;
-}
-
-static void __exit crc32_mod_exit(void)
-{
- if (!cpu_has(CPU_FEATURE_CRC32))
- return;
-
- crypto_unregister_shash(&crc32_alg);
- crypto_unregister_shash(&crc32c_alg);
-}
-
-module_init(crc32_mod_init);
-module_exit(crc32_mod_exit);
-
-MODULE_AUTHOR("Min Zhou <zhoumin@loongson.cn>");
-MODULE_AUTHOR("Huacai Chen <chenhuacai@loongson.cn>");
-MODULE_DESCRIPTION("CRC32 and CRC32C using LoongArch crc* instructions");
-MODULE_LICENSE("GPL v2");
generated by cgit (git 2.34.1) at 2025-03-22 12:01:45 +0000