Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #include <crypto/internal/hash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/xxhash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #define XXHASH64_BLOCK_SIZE	32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #define XXHASH64_DIGEST_SIZE	8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) struct xxhash64_tfm_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 	u64 seed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) struct xxhash64_desc_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	struct xxh64_state xxhstate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) static int xxhash64_setkey(struct crypto_shash *tfm, const u8 *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 			 unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	struct xxhash64_tfm_ctx *tctx = crypto_shash_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	if (keylen != sizeof(tctx->seed))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	tctx->seed = get_unaligned_le64(key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) static int xxhash64_init(struct shash_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	struct xxhash64_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	struct xxhash64_desc_ctx *dctx = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	xxh64_reset(&dctx->xxhstate, tctx->seed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) static int xxhash64_update(struct shash_desc *desc, const u8 *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 			 unsigned int length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	struct xxhash64_desc_ctx *dctx = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	xxh64_update(&dctx->xxhstate, data, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) static int xxhash64_final(struct shash_desc *desc, u8 *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	struct xxhash64_desc_ctx *dctx = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	put_unaligned_le64(xxh64_digest(&dctx->xxhstate), out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) static int xxhash64_digest(struct shash_desc *desc, const u8 *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 			 unsigned int length, u8 *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	struct xxhash64_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	put_unaligned_le64(xxh64(data, length, tctx->seed), out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) static struct shash_alg alg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	.digestsize	= XXHASH64_DIGEST_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	.setkey		= xxhash64_setkey,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	.init		= xxhash64_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	.update		= xxhash64_update,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	.final		= xxhash64_final,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	.digest		= xxhash64_digest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	.descsize	= sizeof(struct xxhash64_desc_ctx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	.base		= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		.cra_name	 = "xxhash64",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		.cra_driver_name = "xxhash64-generic",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		.cra_priority	 = 100,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		.cra_flags	 = CRYPTO_ALG_OPTIONAL_KEY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		.cra_blocksize	 = XXHASH64_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		.cra_ctxsize	 = sizeof(struct xxhash64_tfm_ctx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		.cra_module	 = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) static int __init xxhash_mod_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	return crypto_register_shash(&alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) static void __exit xxhash_mod_fini(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	crypto_unregister_shash(&alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) subsys_initcall(xxhash_mod_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) module_exit(xxhash_mod_fini);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) MODULE_AUTHOR("Nikolay Borisov <nborisov@suse.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) MODULE_DESCRIPTION("xxhash calculations wrapper for lib/xxhash.c");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) MODULE_ALIAS_CRYPTO("xxhash64");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) MODULE_ALIAS_CRYPTO("xxhash64-generic");