Merge tag 'for-linus' of https://github.com/openrisc/linux
[platform/kernel/linux-starfive.git] / crypto / crc64_rocksoft_generic.c
1 // SPDX-License-Identifier: GPL-2.0-only
2
3 #include <linux/crc64.h>
4 #include <linux/module.h>
5 #include <crypto/internal/hash.h>
6 #include <asm/unaligned.h>
7
8 static int chksum_init(struct shash_desc *desc)
9 {
10         u64 *crc = shash_desc_ctx(desc);
11
12         *crc = 0;
13
14         return 0;
15 }
16
17 static int chksum_update(struct shash_desc *desc, const u8 *data,
18                          unsigned int length)
19 {
20         u64 *crc = shash_desc_ctx(desc);
21
22         *crc = crc64_rocksoft_generic(*crc, data, length);
23
24         return 0;
25 }
26
27 static int chksum_final(struct shash_desc *desc, u8 *out)
28 {
29         u64 *crc = shash_desc_ctx(desc);
30
31         put_unaligned_le64(*crc, out);
32         return 0;
33 }
34
35 static int __chksum_finup(u64 crc, const u8 *data, unsigned int len, u8 *out)
36 {
37         crc = crc64_rocksoft_generic(crc, data, len);
38         put_unaligned_le64(crc, out);
39         return 0;
40 }
41
42 static int chksum_finup(struct shash_desc *desc, const u8 *data,
43                         unsigned int len, u8 *out)
44 {
45         u64 *crc = shash_desc_ctx(desc);
46
47         return __chksum_finup(*crc, data, len, out);
48 }
49
50 static int chksum_digest(struct shash_desc *desc, const u8 *data,
51                          unsigned int length, u8 *out)
52 {
53         return __chksum_finup(0, data, length, out);
54 }
55
56 static struct shash_alg alg = {
57         .digestsize     =       sizeof(u64),
58         .init           =       chksum_init,
59         .update         =       chksum_update,
60         .final          =       chksum_final,
61         .finup          =       chksum_finup,
62         .digest         =       chksum_digest,
63         .descsize       =       sizeof(u64),
64         .base           =       {
65                 .cra_name               =       CRC64_ROCKSOFT_STRING,
66                 .cra_driver_name        =       "crc64-rocksoft-generic",
67                 .cra_priority           =       200,
68                 .cra_blocksize          =       1,
69                 .cra_module             =       THIS_MODULE,
70         }
71 };
72
73 static int __init crc64_rocksoft_init(void)
74 {
75         return crypto_register_shash(&alg);
76 }
77
78 static void __exit crc64_rocksoft_exit(void)
79 {
80         crypto_unregister_shash(&alg);
81 }
82
83 module_init(crc64_rocksoft_init);
84 module_exit(crc64_rocksoft_exit);
85
86 MODULE_LICENSE("GPL");
87 MODULE_DESCRIPTION("Rocksoft model CRC64 calculation.");
88 MODULE_ALIAS_CRYPTO("crc64-rocksoft");
89 MODULE_ALIAS_CRYPTO("crc64-rocksoft-generic");