1/*
2 * Aug 8, 2011 Bob Pearson with help from Joakim Tjernlund and George Spelvin
3 * cleaned up code to current version of sparse and added the slicing-by-8
4 * algorithm to the closely similar existing slicing-by-4 algorithm.
5 *
6 * Oct 15, 2000 Matt Domsch <Matt_Domsch@dell.com>
7 * Nicer crc32 functions/docs submitted by linux@horizon.com. Thanks!
8 * Code was from the public domain, copyright abandoned. Code was
9 * subsequently included in the kernel, thus was re-licensed under the
10 * GNU GPL v2.
11 *
12 * Oct 12, 2000 Matt Domsch <Matt_Domsch@dell.com>
13 * Same crc32 function was used in 5 other places in the kernel.
14 * I made one version, and deleted the others.
15 * There are various incantations of crc32(). Some use a seed of 0 or ~0.
16 * Some xor at the end with ~0. The generic crc32() function takes
17 * seed as an argument, and doesn't xor at the end. Then individual
18 * users can do whatever they need.
19 * drivers/net/smc9194.c uses seed ~0, doesn't xor with ~0.
20 * fs/jffs2 uses seed 0, doesn't xor with ~0.
21 * fs/partitions/efi.c uses seed ~0, xor's with ~0.
22 *
23 * This source code is licensed under the GNU General Public License,
24 * Version 2. See the file COPYING for more details.
25 */
26
27#include <linux/crc32.h>
28#include <linux/module.h>
29#include <linux/sched.h>
30
31#include "crc32defs.h"
32
33/* 4096 random bytes */
34static u8 const __aligned(8) test_buf[] __initconst =
35{
36 0x5b, 0x85, 0x21, 0xcb, 0x09, 0x68, 0x7d, 0x30,
37 0xc7, 0x69, 0xd7, 0x30, 0x92, 0xde, 0x59, 0xe4,
38 0xc9, 0x6e, 0x8b, 0xdb, 0x98, 0x6b, 0xaa, 0x60,
39 0xa8, 0xb5, 0xbc, 0x6c, 0xa9, 0xb1, 0x5b, 0x2c,
40 0xea, 0xb4, 0x92, 0x6a, 0x3f, 0x79, 0x91, 0xe4,
41 0xe9, 0x70, 0x51, 0x8c, 0x7f, 0x95, 0x6f, 0x1a,
42 0x56, 0xa1, 0x5c, 0x27, 0x03, 0x67, 0x9f, 0x3a,
43 0xe2, 0x31, 0x11, 0x29, 0x6b, 0x98, 0xfc, 0xc4,
44 0x53, 0x24, 0xc5, 0x8b, 0xce, 0x47, 0xb2, 0xb9,
45 0x32, 0xcb, 0xc1, 0xd0, 0x03, 0x57, 0x4e, 0xd4,
46 0xe9, 0x3c, 0xa1, 0x63, 0xcf, 0x12, 0x0e, 0xca,
47 0xe1, 0x13, 0xd1, 0x93, 0xa6, 0x88, 0x5c, 0x61,
48 0x5b, 0xbb, 0xf0, 0x19, 0x46, 0xb4, 0xcf, 0x9e,
49 0xb6, 0x6b, 0x4c, 0x3a, 0xcf, 0x60, 0xf9, 0x7a,
50 0x8d, 0x07, 0x63, 0xdb, 0x40, 0xe9, 0x0b, 0x6f,
51 0xad, 0x97, 0xf1, 0xed, 0xd0, 0x1e, 0x26, 0xfd,
52 0xbf, 0xb7, 0xc8, 0x04, 0x94, 0xf8, 0x8b, 0x8c,
53 0xf1, 0xab, 0x7a, 0xd4, 0xdd, 0xf3, 0xe8, 0x88,
54 0xc3, 0xed, 0x17, 0x8a, 0x9b, 0x40, 0x0d, 0x53,
55 0x62, 0x12, 0x03, 0x5f, 0x1b, 0x35, 0x32, 0x1f,
56 0xb4, 0x7b, 0x93, 0x78, 0x0d, 0xdb, 0xce, 0xa4,
57 0xc0, 0x47, 0xd5, 0xbf, 0x68, 0xe8, 0x5d, 0x74,
58 0x8f, 0x8e, 0x75, 0x1c, 0xb2, 0x4f, 0x9a, 0x60,
59 0xd1, 0xbe, 0x10, 0xf4, 0x5c, 0xa1, 0x53, 0x09,
60 0xa5, 0xe0, 0x09, 0x54, 0x85, 0x5c, 0xdc, 0x07,
61 0xe7, 0x21, 0x69, 0x7b, 0x8a, 0xfd, 0x90, 0xf1,
62 0x22, 0xd0, 0xb4, 0x36, 0x28, 0xe6, 0xb8, 0x0f,
63 0x39, 0xde, 0xc8, 0xf3, 0x86, 0x60, 0x34, 0xd2,
64 0x5e, 0xdf, 0xfd, 0xcf, 0x0f, 0xa9, 0x65, 0xf0,
65 0xd5, 0x4d, 0x96, 0x40, 0xe3, 0xdf, 0x3f, 0x95,
66 0x5a, 0x39, 0x19, 0x93, 0xf4, 0x75, 0xce, 0x22,
67 0x00, 0x1c, 0x93, 0xe2, 0x03, 0x66, 0xf4, 0x93,
68 0x73, 0x86, 0x81, 0x8e, 0x29, 0x44, 0x48, 0x86,
69 0x61, 0x7c, 0x48, 0xa3, 0x43, 0xd2, 0x9c, 0x8d,
70 0xd4, 0x95, 0xdd, 0xe1, 0x22, 0x89, 0x3a, 0x40,
71 0x4c, 0x1b, 0x8a, 0x04, 0xa8, 0x09, 0x69, 0x8b,
72 0xea, 0xc6, 0x55, 0x8e, 0x57, 0xe6, 0x64, 0x35,
73 0xf0, 0xc7, 0x16, 0x9f, 0x5d, 0x5e, 0x86, 0x40,
74 0x46, 0xbb, 0xe5, 0x45, 0x88, 0xfe, 0xc9, 0x63,
75 0x15, 0xfb, 0xf5, 0xbd, 0x71, 0x61, 0xeb, 0x7b,
76 0x78, 0x70, 0x07, 0x31, 0x03, 0x9f, 0xb2, 0xc8,
77 0xa7, 0xab, 0x47, 0xfd, 0xdf, 0xa0, 0x78, 0x72,
78 0xa4, 0x2a, 0xe4, 0xb6, 0xba, 0xc0, 0x1e, 0x86,
79 0x71, 0xe6, 0x3d, 0x18, 0x37, 0x70, 0xe6, 0xff,
80 0xe0, 0xbc, 0x0b, 0x22, 0xa0, 0x1f, 0xd3, 0xed,
81 0xa2, 0x55, 0x39, 0xab, 0xa8, 0x13, 0x73, 0x7c,
82 0x3f, 0xb2, 0xd6, 0x19, 0xac, 0xff, 0x99, 0xed,
83 0xe8, 0xe6, 0xa6, 0x22, 0xe3, 0x9c, 0xf1, 0x30,
84 0xdc, 0x01, 0x0a, 0x56, 0xfa, 0xe4, 0xc9, 0x99,
85 0xdd, 0xa8, 0xd8, 0xda, 0x35, 0x51, 0x73, 0xb4,
86 0x40, 0x86, 0x85, 0xdb, 0x5c, 0xd5, 0x85, 0x80,
87 0x14, 0x9c, 0xfd, 0x98, 0xa9, 0x82, 0xc5, 0x37,
88 0xff, 0x32, 0x5d, 0xd0, 0x0b, 0xfa, 0xdc, 0x04,
89 0x5e, 0x09, 0xd2, 0xca, 0x17, 0x4b, 0x1a, 0x8e,
90 0x15, 0xe1, 0xcc, 0x4e, 0x52, 0x88, 0x35, 0xbd,
91 0x48, 0xfe, 0x15, 0xa0, 0x91, 0xfd, 0x7e, 0x6c,
92 0x0e, 0x5d, 0x79, 0x1b, 0x81, 0x79, 0xd2, 0x09,
93 0x34, 0x70, 0x3d, 0x81, 0xec, 0xf6, 0x24, 0xbb,
94 0xfb, 0xf1, 0x7b, 0xdf, 0x54, 0xea, 0x80, 0x9b,
95 0xc7, 0x99, 0x9e, 0xbd, 0x16, 0x78, 0x12, 0x53,
96 0x5e, 0x01, 0xa7, 0x4e, 0xbd, 0x67, 0xe1, 0x9b,
97 0x4c, 0x0e, 0x61, 0x45, 0x97, 0xd2, 0xf0, 0x0f,
98 0xfe, 0x15, 0x08, 0xb7, 0x11, 0x4c, 0xe7, 0xff,
99 0x81, 0x53, 0xff, 0x91, 0x25, 0x38, 0x7e, 0x40,
100 0x94, 0xe5, 0xe0, 0xad, 0xe6, 0xd9, 0x79, 0xb6,
101 0x92, 0xc9, 0xfc, 0xde, 0xc3, 0x1a, 0x23, 0xbb,
102 0xdd, 0xc8, 0x51, 0x0c, 0x3a, 0x72, 0xfa, 0x73,
103 0x6f, 0xb7, 0xee, 0x61, 0x39, 0x03, 0x01, 0x3f,
104 0x7f, 0x94, 0x2e, 0x2e, 0xba, 0x3a, 0xbb, 0xb4,
105 0xfa, 0x6a, 0x17, 0xfe, 0xea, 0xef, 0x5e, 0x66,
106 0x97, 0x3f, 0x32, 0x3d, 0xd7, 0x3e, 0xb1, 0xf1,
107 0x6c, 0x14, 0x4c, 0xfd, 0x37, 0xd3, 0x38, 0x80,
108 0xfb, 0xde, 0xa6, 0x24, 0x1e, 0xc8, 0xca, 0x7f,
109 0x3a, 0x93, 0xd8, 0x8b, 0x18, 0x13, 0xb2, 0xe5,
110 0xe4, 0x93, 0x05, 0x53, 0x4f, 0x84, 0x66, 0xa7,
111 0x58, 0x5c, 0x7b, 0x86, 0x52, 0x6d, 0x0d, 0xce,
112 0xa4, 0x30, 0x7d, 0xb6, 0x18, 0x9f, 0xeb, 0xff,
113 0x22, 0xbb, 0x72, 0x29, 0xb9, 0x44, 0x0b, 0x48,
114 0x1e, 0x84, 0x71, 0x81, 0xe3, 0x6d, 0x73, 0x26,
115 0x92, 0xb4, 0x4d, 0x2a, 0x29, 0xb8, 0x1f, 0x72,
116 0xed, 0xd0, 0xe1, 0x64, 0x77, 0xea, 0x8e, 0x88,
117 0x0f, 0xef, 0x3f, 0xb1, 0x3b, 0xad, 0xf9, 0xc9,
118 0x8b, 0xd0, 0xac, 0xc6, 0xcc, 0xa9, 0x40, 0xcc,
119 0x76, 0xf6, 0x3b, 0x53, 0xb5, 0x88, 0xcb, 0xc8,
120 0x37, 0xf1, 0xa2, 0xba, 0x23, 0x15, 0x99, 0x09,
121 0xcc, 0xe7, 0x7a, 0x3b, 0x37, 0xf7, 0x58, 0xc8,
122 0x46, 0x8c, 0x2b, 0x2f, 0x4e, 0x0e, 0xa6, 0x5c,
123 0xea, 0x85, 0x55, 0xba, 0x02, 0x0e, 0x0e, 0x48,
124 0xbc, 0xe1, 0xb1, 0x01, 0x35, 0x79, 0x13, 0x3d,
125 0x1b, 0xc0, 0x53, 0x68, 0x11, 0xe7, 0x95, 0x0f,
126 0x9d, 0x3f, 0x4c, 0x47, 0x7b, 0x4d, 0x1c, 0xae,
127 0x50, 0x9b, 0xcb, 0xdd, 0x05, 0x8d, 0x9a, 0x97,
128 0xfd, 0x8c, 0xef, 0x0c, 0x1d, 0x67, 0x73, 0xa8,
129 0x28, 0x36, 0xd5, 0xb6, 0x92, 0x33, 0x40, 0x75,
130 0x0b, 0x51, 0xc3, 0x64, 0xba, 0x1d, 0xc2, 0xcc,
131 0xee, 0x7d, 0x54, 0x0f, 0x27, 0x69, 0xa7, 0x27,
132 0x63, 0x30, 0x29, 0xd9, 0xc8, 0x84, 0xd8, 0xdf,
133 0x9f, 0x68, 0x8d, 0x04, 0xca, 0xa6, 0xc5, 0xc7,
134 0x7a, 0x5c, 0xc8, 0xd1, 0xcb, 0x4a, 0xec, 0xd0,
135 0xd8, 0x20, 0x69, 0xc5, 0x17, 0xcd, 0x78, 0xc8,
136 0x75, 0x23, 0x30, 0x69, 0xc9, 0xd4, 0xea, 0x5c,
137 0x4f, 0x6b, 0x86, 0x3f, 0x8b, 0xfe, 0xee, 0x44,
138 0xc9, 0x7c, 0xb7, 0xdd, 0x3e, 0xe5, 0xec, 0x54,
139 0x03, 0x3e, 0xaa, 0x82, 0xc6, 0xdf, 0xb2, 0x38,
140 0x0e, 0x5d, 0xb3, 0x88, 0xd9, 0xd3, 0x69, 0x5f,
141 0x8f, 0x70, 0x8a, 0x7e, 0x11, 0xd9, 0x1e, 0x7b,
142 0x38, 0xf1, 0x42, 0x1a, 0xc0, 0x35, 0xf5, 0xc7,
143 0x36, 0x85, 0xf5, 0xf7, 0xb8, 0x7e, 0xc7, 0xef,
144 0x18, 0xf1, 0x63, 0xd6, 0x7a, 0xc6, 0xc9, 0x0e,
145 0x4d, 0x69, 0x4f, 0x84, 0xef, 0x26, 0x41, 0x0c,
146 0xec, 0xc7, 0xe0, 0x7e, 0x3c, 0x67, 0x01, 0x4c,
147 0x62, 0x1a, 0x20, 0x6f, 0xee, 0x47, 0x4d, 0xc0,
148 0x99, 0x13, 0x8d, 0x91, 0x4a, 0x26, 0xd4, 0x37,
149 0x28, 0x90, 0x58, 0x75, 0x66, 0x2b, 0x0a, 0xdf,
150 0xda, 0xee, 0x92, 0x25, 0x90, 0x62, 0x39, 0x9e,
151 0x44, 0x98, 0xad, 0xc1, 0x88, 0xed, 0xe4, 0xb4,
152 0xaf, 0xf5, 0x8c, 0x9b, 0x48, 0x4d, 0x56, 0x60,
153 0x97, 0x0f, 0x61, 0x59, 0x9e, 0xa6, 0x27, 0xfe,
154 0xc1, 0x91, 0x15, 0x38, 0xb8, 0x0f, 0xae, 0x61,
155 0x7d, 0x26, 0x13, 0x5a, 0x73, 0xff, 0x1c, 0xa3,
156 0x61, 0x04, 0x58, 0x48, 0x55, 0x44, 0x11, 0xfe,
157 0x15, 0xca, 0xc3, 0xbd, 0xca, 0xc5, 0xb4, 0x40,
158 0x5d, 0x1b, 0x7f, 0x39, 0xb5, 0x9c, 0x35, 0xec,
159 0x61, 0x15, 0x32, 0x32, 0xb8, 0x4e, 0x40, 0x9f,
160 0x17, 0x1f, 0x0a, 0x4d, 0xa9, 0x91, 0xef, 0xb7,
161 0xb0, 0xeb, 0xc2, 0x83, 0x9a, 0x6c, 0xd2, 0x79,
162 0x43, 0x78, 0x5e, 0x2f, 0xe5, 0xdd, 0x1a, 0x3c,
163 0x45, 0xab, 0x29, 0x40, 0x3a, 0x37, 0x5b, 0x6f,
164 0xd7, 0xfc, 0x48, 0x64, 0x3c, 0x49, 0xfb, 0x21,
165 0xbe, 0xc3, 0xff, 0x07, 0xfb, 0x17, 0xe9, 0xc9,
166 0x0c, 0x4c, 0x5c, 0x15, 0x9e, 0x8e, 0x22, 0x30,
167 0x0a, 0xde, 0x48, 0x7f, 0xdb, 0x0d, 0xd1, 0x2b,
168 0x87, 0x38, 0x9e, 0xcc, 0x5a, 0x01, 0x16, 0xee,
169 0x75, 0x49, 0x0d, 0x30, 0x01, 0x34, 0x6a, 0xb6,
170 0x9a, 0x5a, 0x2a, 0xec, 0xbb, 0x48, 0xac, 0xd3,
171 0x77, 0x83, 0xd8, 0x08, 0x86, 0x4f, 0x48, 0x09,
172 0x29, 0x41, 0x79, 0xa1, 0x03, 0x12, 0xc4, 0xcd,
173 0x90, 0x55, 0x47, 0x66, 0x74, 0x9a, 0xcc, 0x4f,
174 0x35, 0x8c, 0xd6, 0x98, 0xef, 0xeb, 0x45, 0xb9,
175 0x9a, 0x26, 0x2f, 0x39, 0xa5, 0x70, 0x6d, 0xfc,
176 0xb4, 0x51, 0xee, 0xf4, 0x9c, 0xe7, 0x38, 0x59,
177 0xad, 0xf4, 0xbc, 0x46, 0xff, 0x46, 0x8e, 0x60,
178 0x9c, 0xa3, 0x60, 0x1d, 0xf8, 0x26, 0x72, 0xf5,
179 0x72, 0x9d, 0x68, 0x80, 0x04, 0xf6, 0x0b, 0xa1,
180 0x0a, 0xd5, 0xa7, 0x82, 0x3a, 0x3e, 0x47, 0xa8,
181 0x5a, 0xde, 0x59, 0x4f, 0x7b, 0x07, 0xb3, 0xe9,
182 0x24, 0x19, 0x3d, 0x34, 0x05, 0xec, 0xf1, 0xab,
183 0x6e, 0x64, 0x8f, 0xd3, 0xe6, 0x41, 0x86, 0x80,
184 0x70, 0xe3, 0x8d, 0x60, 0x9c, 0x34, 0x25, 0x01,
185 0x07, 0x4d, 0x19, 0x41, 0x4e, 0x3d, 0x5c, 0x7e,
186 0xa8, 0xf5, 0xcc, 0xd5, 0x7b, 0xe2, 0x7d, 0x3d,
187 0x49, 0x86, 0x7d, 0x07, 0xb7, 0x10, 0xe3, 0x35,
188 0xb8, 0x84, 0x6d, 0x76, 0xab, 0x17, 0xc6, 0x38,
189 0xb4, 0xd3, 0x28, 0x57, 0xad, 0xd3, 0x88, 0x5a,
190 0xda, 0xea, 0xc8, 0x94, 0xcc, 0x37, 0x19, 0xac,
191 0x9c, 0x9f, 0x4b, 0x00, 0x15, 0xc0, 0xc8, 0xca,
192 0x1f, 0x15, 0xaa, 0xe0, 0xdb, 0xf9, 0x2f, 0x57,
193 0x1b, 0x24, 0xc7, 0x6f, 0x76, 0x29, 0xfb, 0xed,
194 0x25, 0x0d, 0xc0, 0xfe, 0xbd, 0x5a, 0xbf, 0x20,
195 0x08, 0x51, 0x05, 0xec, 0x71, 0xa3, 0xbf, 0xef,
196 0x5e, 0x99, 0x75, 0xdb, 0x3c, 0x5f, 0x9a, 0x8c,
197 0xbb, 0x19, 0x5c, 0x0e, 0x93, 0x19, 0xf8, 0x6a,
198 0xbc, 0xf2, 0x12, 0x54, 0x2f, 0xcb, 0x28, 0x64,
199 0x88, 0xb3, 0x92, 0x0d, 0x96, 0xd1, 0xa6, 0xe4,
200 0x1f, 0xf1, 0x4d, 0xa4, 0xab, 0x1c, 0xee, 0x54,
201 0xf2, 0xad, 0x29, 0x6d, 0x32, 0x37, 0xb2, 0x16,
202 0x77, 0x5c, 0xdc, 0x2e, 0x54, 0xec, 0x75, 0x26,
203 0xc6, 0x36, 0xd9, 0x17, 0x2c, 0xf1, 0x7a, 0xdc,
204 0x4b, 0xf1, 0xe2, 0xd9, 0x95, 0xba, 0xac, 0x87,
205 0xc1, 0xf3, 0x8e, 0x58, 0x08, 0xd8, 0x87, 0x60,
206 0xc9, 0xee, 0x6a, 0xde, 0xa4, 0xd2, 0xfc, 0x0d,
207 0xe5, 0x36, 0xc4, 0x5c, 0x52, 0xb3, 0x07, 0x54,
208 0x65, 0x24, 0xc1, 0xb1, 0xd1, 0xb1, 0x53, 0x13,
209 0x31, 0x79, 0x7f, 0x05, 0x76, 0xeb, 0x37, 0x59,
210 0x15, 0x2b, 0xd1, 0x3f, 0xac, 0x08, 0x97, 0xeb,
211 0x91, 0x98, 0xdf, 0x6c, 0x09, 0x0d, 0x04, 0x9f,
212 0xdc, 0x3b, 0x0e, 0x60, 0x68, 0x47, 0x23, 0x15,
213 0x16, 0xc6, 0x0b, 0x35, 0xf8, 0x77, 0xa2, 0x78,
214 0x50, 0xd4, 0x64, 0x22, 0x33, 0xff, 0xfb, 0x93,
215 0x71, 0x46, 0x50, 0x39, 0x1b, 0x9c, 0xea, 0x4e,
216 0x8d, 0x0c, 0x37, 0xe5, 0x5c, 0x51, 0x3a, 0x31,
217 0xb2, 0x85, 0x84, 0x3f, 0x41, 0xee, 0xa2, 0xc1,
218 0xc6, 0x13, 0x3b, 0x54, 0x28, 0xd2, 0x18, 0x37,
219 0xcc, 0x46, 0x9f, 0x6a, 0x91, 0x3d, 0x5a, 0x15,
220 0x3c, 0x89, 0xa3, 0x61, 0x06, 0x7d, 0x2e, 0x78,
221 0xbe, 0x7d, 0x40, 0xba, 0x2f, 0x95, 0xb1, 0x2f,
222 0x87, 0x3b, 0x8a, 0xbe, 0x6a, 0xf4, 0xc2, 0x31,
223 0x74, 0xee, 0x91, 0xe0, 0x23, 0xaa, 0x5d, 0x7f,
224 0xdd, 0xf0, 0x44, 0x8c, 0x0b, 0x59, 0x2b, 0xfc,
225 0x48, 0x3a, 0xdf, 0x07, 0x05, 0x38, 0x6c, 0xc9,
226 0xeb, 0x18, 0x24, 0x68, 0x8d, 0x58, 0x98, 0xd3,
227 0x31, 0xa3, 0xe4, 0x70, 0x59, 0xb1, 0x21, 0xbe,
228 0x7e, 0x65, 0x7d, 0xb8, 0x04, 0xab, 0xf6, 0xe4,
229 0xd7, 0xda, 0xec, 0x09, 0x8f, 0xda, 0x6d, 0x24,
230 0x07, 0xcc, 0x29, 0x17, 0x05, 0x78, 0x1a, 0xc1,
231 0xb1, 0xce, 0xfc, 0xaa, 0x2d, 0xe7, 0xcc, 0x85,
232 0x84, 0x84, 0x03, 0x2a, 0x0c, 0x3f, 0xa9, 0xf8,
233 0xfd, 0x84, 0x53, 0x59, 0x5c, 0xf0, 0xd4, 0x09,
234 0xf0, 0xd2, 0x6c, 0x32, 0x03, 0xb0, 0xa0, 0x8c,
235 0x52, 0xeb, 0x23, 0x91, 0x88, 0x43, 0x13, 0x46,
236 0xf6, 0x1e, 0xb4, 0x1b, 0xf5, 0x8e, 0x3a, 0xb5,
237 0x3d, 0x00, 0xf6, 0xe5, 0x08, 0x3d, 0x5f, 0x39,
238 0xd3, 0x21, 0x69, 0xbc, 0x03, 0x22, 0x3a, 0xd2,
239 0x5c, 0x84, 0xf8, 0x15, 0xc4, 0x80, 0x0b, 0xbc,
240 0x29, 0x3c, 0xf3, 0x95, 0x98, 0xcd, 0x8f, 0x35,
241 0xbc, 0xa5, 0x3e, 0xfc, 0xd4, 0x13, 0x9e, 0xde,
242 0x4f, 0xce, 0x71, 0x9d, 0x09, 0xad, 0xf2, 0x80,
243 0x6b, 0x65, 0x7f, 0x03, 0x00, 0x14, 0x7c, 0x15,
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462 0x55, 0x73, 0x26, 0xa5, 0x50, 0xea, 0x92, 0x4b,
463 0x3c, 0x5c, 0x82, 0x33, 0xf0, 0x01, 0x3f, 0x03,
464 0xc1, 0x08, 0x05, 0xbf, 0x98, 0xf4, 0x9b, 0x6d,
465 0xa5, 0xa8, 0xb4, 0x82, 0x0c, 0x06, 0xfa, 0xff,
466 0x2d, 0x08, 0xf3, 0x05, 0x4f, 0x57, 0x2a, 0x39,
467 0xd4, 0x83, 0x0d, 0x75, 0x51, 0xd8, 0x5b, 0x1b,
468 0xd3, 0x51, 0x5a, 0x32, 0x2a, 0x9b, 0x32, 0xb2,
469 0xf2, 0xa4, 0x96, 0x12, 0xf2, 0xae, 0x40, 0x34,
470 0x67, 0xa8, 0xf5, 0x44, 0xd5, 0x35, 0x53, 0xfe,
471 0xa3, 0x60, 0x96, 0x63, 0x0f, 0x1f, 0x6e, 0xb0,
472 0x5a, 0x42, 0xa6, 0xfc, 0x51, 0x0b, 0x60, 0x27,
473 0xbc, 0x06, 0x71, 0xed, 0x65, 0x5b, 0x23, 0x86,
474 0x4a, 0x07, 0x3b, 0x22, 0x07, 0x46, 0xe6, 0x90,
475 0x3e, 0xf3, 0x25, 0x50, 0x1b, 0x4c, 0x7f, 0x03,
476 0x08, 0xa8, 0x36, 0x6b, 0x87, 0xe5, 0xe3, 0xdb,
477 0x9a, 0x38, 0x83, 0xff, 0x9f, 0x1a, 0x9f, 0x57,
478 0xa4, 0x2a, 0xf6, 0x37, 0xbc, 0x1a, 0xff, 0xc9,
479 0x1e, 0x35, 0x0c, 0xc3, 0x7c, 0xa3, 0xb2, 0xe5,
480 0xd2, 0xc6, 0xb4, 0x57, 0x47, 0xe4, 0x32, 0x16,
481 0x6d, 0xa9, 0xae, 0x64, 0xe6, 0x2d, 0x8d, 0xc5,
482 0x8d, 0x50, 0x8e, 0xe8, 0x1a, 0x22, 0x34, 0x2a,
483 0xd9, 0xeb, 0x51, 0x90, 0x4a, 0xb1, 0x41, 0x7d,
484 0x64, 0xf9, 0xb9, 0x0d, 0xf6, 0x23, 0x33, 0xb0,
485 0x33, 0xf4, 0xf7, 0x3f, 0x27, 0x84, 0xc6, 0x0f,
486 0x54, 0xa5, 0xc0, 0x2e, 0xec, 0x0b, 0x3a, 0x48,
487 0x6e, 0x80, 0x35, 0x81, 0x43, 0x9b, 0x90, 0xb1,
488 0xd0, 0x2b, 0xea, 0x21, 0xdc, 0xda, 0x5b, 0x09,
489 0xf4, 0xcc, 0x10, 0xb4, 0xc7, 0xfe, 0x79, 0x51,
490 0xc3, 0xc5, 0xac, 0x88, 0x74, 0x84, 0x0b, 0x4b,
491 0xca, 0x79, 0x16, 0x29, 0xfb, 0x69, 0x54, 0xdf,
492 0x41, 0x7e, 0xe9, 0xc7, 0x8e, 0xea, 0xa5, 0xfe,
493 0xfc, 0x76, 0x0e, 0x90, 0xc4, 0x92, 0x38, 0xad,
494 0x7b, 0x48, 0xe6, 0x6e, 0xf7, 0x21, 0xfd, 0x4e,
495 0x93, 0x0a, 0x7b, 0x41, 0x83, 0x68, 0xfb, 0x57,
496 0x51, 0x76, 0x34, 0xa9, 0x6c, 0x00, 0xaa, 0x4f,
497 0x66, 0x65, 0x98, 0x4a, 0x4f, 0xa3, 0xa0, 0xef,
498 0x69, 0x3f, 0xe3, 0x1c, 0x92, 0x8c, 0xfd, 0xd8,
499 0xe8, 0xde, 0x7c, 0x7f, 0x3e, 0x84, 0x8e, 0x69,
500 0x3c, 0xf1, 0xf2, 0x05, 0x46, 0xdc, 0x2f, 0x9d,
501 0x5e, 0x6e, 0x4c, 0xfb, 0xb5, 0x99, 0x2a, 0x59,
502 0x63, 0xc1, 0x34, 0xbc, 0x57, 0xc0, 0x0d, 0xb9,
503 0x61, 0x25, 0xf3, 0x33, 0x23, 0x51, 0xb6, 0x0d,
504 0x07, 0xa6, 0xab, 0x94, 0x4a, 0xb7, 0x2a, 0xea,
505 0xee, 0xac, 0xa3, 0xc3, 0x04, 0x8b, 0x0e, 0x56,
506 0xfe, 0x44, 0xa7, 0x39, 0xe2, 0xed, 0xed, 0xb4,
507 0x22, 0x2b, 0xac, 0x12, 0x32, 0x28, 0x91, 0xd8,
508 0xa5, 0xab, 0xff, 0x5f, 0xe0, 0x4b, 0xda, 0x78,
509 0x17, 0xda, 0xf1, 0x01, 0x5b, 0xcd, 0xe2, 0x5f,
510 0x50, 0x45, 0x73, 0x2b, 0xe4, 0x76, 0x77, 0xf4,
511 0x64, 0x1d, 0x43, 0xfb, 0x84, 0x7a, 0xea, 0x91,
512 0xae, 0xf9, 0x9e, 0xb7, 0xb4, 0xb0, 0x91, 0x5f,
513 0x16, 0x35, 0x9a, 0x11, 0xb8, 0xc7, 0xc1, 0x8c,
514 0xc6, 0x10, 0x8d, 0x2f, 0x63, 0x4a, 0xa7, 0x57,
515 0x3a, 0x51, 0xd6, 0x32, 0x2d, 0x64, 0x72, 0xd4,
516 0x66, 0xdc, 0x10, 0xa6, 0x67, 0xd6, 0x04, 0x23,
517 0x9d, 0x0a, 0x11, 0x77, 0xdd, 0x37, 0x94, 0x17,
518 0x3c, 0xbf, 0x8b, 0x65, 0xb0, 0x2e, 0x5e, 0x66,
519 0x47, 0x64, 0xac, 0xdd, 0xf0, 0x84, 0xfd, 0x39,
520 0xfa, 0x15, 0x5d, 0xef, 0xae, 0xca, 0xc1, 0x36,
521 0xa7, 0x5c, 0xbf, 0xc7, 0x08, 0xc2, 0x66, 0x00,
522 0x74, 0x74, 0x4e, 0x27, 0x3f, 0x55, 0x8a, 0xb7,
523 0x38, 0x66, 0x83, 0x6d, 0xcf, 0x99, 0x9e, 0x60,
524 0x8f, 0xdd, 0x2e, 0x62, 0x22, 0x0e, 0xef, 0x0c,
525 0x98, 0xa7, 0x85, 0x74, 0x3b, 0x9d, 0xec, 0x9e,
526 0xa9, 0x19, 0x72, 0xa5, 0x7f, 0x2c, 0x39, 0xb7,
527 0x7d, 0xb7, 0xf1, 0x12, 0x65, 0x27, 0x4b, 0x5a,
528 0xde, 0x17, 0xfe, 0xad, 0x44, 0xf3, 0x20, 0x4d,
529 0xfd, 0xe4, 0x1f, 0xb5, 0x81, 0xb0, 0x36, 0x37,
530 0x08, 0x6f, 0xc3, 0x0c, 0xe9, 0x85, 0x98, 0x82,
531 0xa9, 0x62, 0x0c, 0xc4, 0x97, 0xc0, 0x50, 0xc8,
532 0xa7, 0x3c, 0x50, 0x9f, 0x43, 0xb9, 0xcd, 0x5e,
533 0x4d, 0xfa, 0x1c, 0x4b, 0x0b, 0xa9, 0x98, 0x85,
534 0x38, 0x92, 0xac, 0x8d, 0xe4, 0xad, 0x9b, 0x98,
535 0xab, 0xd9, 0x38, 0xac, 0x62, 0x52, 0xa3, 0x22,
536 0x63, 0x0f, 0xbf, 0x95, 0x48, 0xdf, 0x69, 0xe7,
537 0x8b, 0x33, 0xd5, 0xb2, 0xbd, 0x05, 0x49, 0x49,
538 0x9d, 0x57, 0x73, 0x19, 0x33, 0xae, 0xfa, 0x33,
539 0xf1, 0x19, 0xa8, 0x80, 0xce, 0x04, 0x9f, 0xbc,
540 0x1d, 0x65, 0x82, 0x1b, 0xe5, 0x3a, 0x51, 0xc8,
541 0x1c, 0x21, 0xe3, 0x5d, 0xf3, 0x7d, 0x9b, 0x2f,
542 0x2c, 0x1d, 0x4a, 0x7f, 0x9b, 0x68, 0x35, 0xa3,
543 0xb2, 0x50, 0xf7, 0x62, 0x79, 0xcd, 0xf4, 0x98,
544 0x4f, 0xe5, 0x63, 0x7c, 0x3e, 0x45, 0x31, 0x8c,
545 0x16, 0xa0, 0x12, 0xc8, 0x58, 0xce, 0x39, 0xa6,
546 0xbc, 0x54, 0xdb, 0xc5, 0xe0, 0xd5, 0xba, 0xbc,
547 0xb9, 0x04, 0xf4, 0x8d, 0xe8, 0x2f, 0x15, 0x9d,
548};
549
550/* 100 test cases */
551static struct crc_test {
552 u32 crc; /* random starting crc */
553 u32 start; /* random 6 bit offset in buf */
554 u32 length; /* random 11 bit length of test */
555 u32 crc_le; /* expected crc32_le result */
556 u32 crc_be; /* expected crc32_be result */
557 u32 crc32c_le; /* expected crc32c_le result */
558} const test[] __initconst =
559{
560 {0x674bf11d, 0x00000038, 0x00000542, 0x0af6d466, 0xd8b6e4c1, 0xf6e93d6c},
561 {0x35c672c6, 0x0000003a, 0x000001aa, 0xc6d3dfba, 0x28aaf3ad, 0x0fe92aca},
562 {0x496da28e, 0x00000039, 0x000005af, 0xd933660f, 0x5d57e81f, 0x52e1ebb8},
563 {0x09a9b90e, 0x00000027, 0x000001f8, 0xb45fe007, 0xf45fca9a, 0x0798af9a},
564 {0xdc97e5a9, 0x00000025, 0x000003b6, 0xf81a3562, 0xe0126ba2, 0x18eb3152},
565 {0x47c58900, 0x0000000a, 0x000000b9, 0x8e58eccf, 0xf3afc793, 0xd00d08c7},
566 {0x292561e8, 0x0000000c, 0x00000403, 0xa2ba8aaf, 0x0b797aed, 0x8ba966bc},
567 {0x415037f6, 0x00000003, 0x00000676, 0xa17d52e8, 0x7f0fdf35, 0x11d694a2},
568 {0x3466e707, 0x00000026, 0x00000042, 0x258319be, 0x75c484a2, 0x6ab3208d},
569 {0xafd1281b, 0x00000023, 0x000002ee, 0x4428eaf8, 0x06c7ad10, 0xba4603c5},
570 {0xd3857b18, 0x00000028, 0x000004a2, 0x5c430821, 0xb062b7cb, 0xe6071c6f},
571 {0x1d825a8f, 0x0000002b, 0x0000050b, 0xd2c45f0c, 0xd68634e0, 0x179ec30a},
572 {0x5033e3bc, 0x0000000b, 0x00000078, 0xa3ea4113, 0xac6d31fb, 0x0903beb8},
573 {0x94f1fb5e, 0x0000000f, 0x000003a2, 0xfbfc50b1, 0x3cfe50ed, 0x6a7cb4fa},
574 {0xc9a0fe14, 0x00000009, 0x00000473, 0x5fb61894, 0x87070591, 0xdb535801},
575 {0x88a034b1, 0x0000001c, 0x000005ad, 0xc1b16053, 0x46f95c67, 0x92bed597},
576 {0xf0f72239, 0x00000020, 0x0000026d, 0xa6fa58f3, 0xf8c2c1dd, 0x192a3f1b},
577 {0xcc20a5e3, 0x0000003b, 0x0000067a, 0x7740185a, 0x308b979a, 0xccbaec1a},
578 {0xce589c95, 0x0000002b, 0x00000641, 0xd055e987, 0x40aae25b, 0x7eabae4d},
579 {0x78edc885, 0x00000035, 0x000005be, 0xa39cb14b, 0x035b0d1f, 0x28c72982},
580 {0x9d40a377, 0x0000003b, 0x00000038, 0x1f47ccd2, 0x197fbc9d, 0xc3cd4d18},
581 {0x703d0e01, 0x0000003c, 0x000006f1, 0x88735e7c, 0xfed57c5a, 0xbca8f0e7},
582 {0x776bf505, 0x0000000f, 0x000005b2, 0x5cc4fc01, 0xf32efb97, 0x713f60b3},
583 {0x4a3e7854, 0x00000027, 0x000004b8, 0x8d923c82, 0x0cbfb4a2, 0xebd08fd5},
584 {0x209172dd, 0x0000003b, 0x00000356, 0xb89e9c2b, 0xd7868138, 0x64406c59},
585 {0x3ba4cc5b, 0x0000002f, 0x00000203, 0xe51601a9, 0x5b2a1032, 0x7421890e},
586 {0xfc62f297, 0x00000000, 0x00000079, 0x71a8e1a2, 0x5d88685f, 0xe9347603},
587 {0x64280b8b, 0x00000016, 0x000007ab, 0x0fa7a30c, 0xda3a455f, 0x1bef9060},
588 {0x97dd724b, 0x00000033, 0x000007ad, 0x5788b2f4, 0xd7326d32, 0x34720072},
589 {0x61394b52, 0x00000035, 0x00000571, 0xc66525f1, 0xcabe7fef, 0x48310f59},
590 {0x29b4faff, 0x00000024, 0x0000006e, 0xca13751e, 0x993648e0, 0x783a4213},
591 {0x29bfb1dc, 0x0000000b, 0x00000244, 0x436c43f7, 0x429f7a59, 0x9e8efd41},
592 {0x86ae934b, 0x00000035, 0x00000104, 0x0760ec93, 0x9cf7d0f4, 0xfc3d34a5},
593 {0xc4c1024e, 0x0000002e, 0x000006b1, 0x6516a3ec, 0x19321f9c, 0x17a52ae2},
594 {0x3287a80a, 0x00000026, 0x00000496, 0x0b257eb1, 0x754ebd51, 0x886d935a},
595 {0xa4db423e, 0x00000023, 0x0000045d, 0x9b3a66dc, 0x873e9f11, 0xeaaeaeb2},
596 {0x7a1078df, 0x00000015, 0x0000014a, 0x8c2484c5, 0x6a628659, 0x8e900a4b},
597 {0x6048bd5b, 0x00000006, 0x0000006a, 0x897e3559, 0xac9961af, 0xd74662b1},
598 {0xd8f9ea20, 0x0000003d, 0x00000277, 0x60eb905b, 0xed2aaf99, 0xd26752ba},
599 {0xea5ec3b4, 0x0000002a, 0x000004fe, 0x869965dc, 0x6c1f833b, 0x8b1fcd62},
600 {0x2dfb005d, 0x00000016, 0x00000345, 0x6a3b117e, 0xf05e8521, 0xf54342fe},
601 {0x5a214ade, 0x00000020, 0x000005b6, 0x467f70be, 0xcb22ccd3, 0x5b95b988},
602 {0xf0ab9cca, 0x00000032, 0x00000515, 0xed223df3, 0x7f3ef01d, 0x2e1176be},
603 {0x91b444f9, 0x0000002e, 0x000007f8, 0x84e9a983, 0x5676756f, 0x66120546},
604 {0x1b5d2ddb, 0x0000002e, 0x0000012c, 0xba638c4c, 0x3f42047b, 0xf256a5cc},
605 {0xd824d1bb, 0x0000003a, 0x000007b5, 0x6288653b, 0x3a3ebea0, 0x4af1dd69},
606 {0x0470180c, 0x00000034, 0x000001f0, 0x9d5b80d6, 0x3de08195, 0x56f0a04a},
607 {0xffaa3a3f, 0x00000036, 0x00000299, 0xf3a82ab8, 0x53e0c13d, 0x74f6b6b2},
608 {0x6406cfeb, 0x00000023, 0x00000600, 0xa920b8e8, 0xe4e2acf4, 0x085951fd},
609 {0xb24aaa38, 0x0000003e, 0x000004a1, 0x657cc328, 0x5077b2c3, 0xc65387eb},
610 {0x58b2ab7c, 0x00000039, 0x000002b4, 0x3a17ee7e, 0x9dcb3643, 0x1ca9257b},
611 {0x3db85970, 0x00000006, 0x000002b6, 0x95268b59, 0xb9812c10, 0xfd196d76},
612 {0x857830c5, 0x00000003, 0x00000590, 0x4ef439d5, 0xf042161d, 0x5ef88339},
613 {0xe1fcd978, 0x0000003e, 0x000007d8, 0xae8d8699, 0xce0a1ef5, 0x2c3714d9},
614 {0xb982a768, 0x00000016, 0x000006e0, 0x62fad3df, 0x5f8a067b, 0x58576548},
615 {0x1d581ce8, 0x0000001e, 0x0000058b, 0xf0f5da53, 0x26e39eee, 0xfd7c57de},
616 {0x2456719b, 0x00000025, 0x00000503, 0x4296ac64, 0xd50e4c14, 0xd5fedd59},
617 {0xfae6d8f2, 0x00000000, 0x0000055d, 0x057fdf2e, 0x2a31391a, 0x1cc3b17b},
618 {0xcba828e3, 0x00000039, 0x000002ce, 0xe3f22351, 0x8f00877b, 0x270eed73},
619 {0x13d25952, 0x0000000a, 0x0000072d, 0x76d4b4cc, 0x5eb67ec3, 0x91ecbb11},
620 {0x0342be3f, 0x00000015, 0x00000599, 0xec75d9f1, 0x9d4d2826, 0x05ed8d0c},
621 {0xeaa344e0, 0x00000014, 0x000004d8, 0x72a4c981, 0x2064ea06, 0x0b09ad5b},
622 {0xbbb52021, 0x0000003b, 0x00000272, 0x04af99fc, 0xaf042d35, 0xf8d511fb},
623 {0xb66384dc, 0x0000001d, 0x000007fc, 0xd7629116, 0x782bd801, 0x5ad832cc},
624 {0x616c01b6, 0x00000022, 0x000002c8, 0x5b1dab30, 0x783ce7d2, 0x1214d196},
625 {0xce2bdaad, 0x00000016, 0x0000062a, 0x932535c8, 0x3f02926d, 0x5747218a},
626 {0x00fe84d7, 0x00000005, 0x00000205, 0x850e50aa, 0x753d649c, 0xde8f14de},
627 {0xbebdcb4c, 0x00000006, 0x0000055d, 0xbeaa37a2, 0x2d8c9eba, 0x3563b7b9},
628 {0xd8b1a02a, 0x00000010, 0x00000387, 0x5017d2fc, 0x503541a5, 0x071475d0},
629 {0x3b96cad2, 0x00000036, 0x00000347, 0x1d2372ae, 0x926cd90b, 0x54c79d60},
630 {0xc94c1ed7, 0x00000005, 0x0000038b, 0x9e9fdb22, 0x144a9178, 0x4c53eee6},
631 {0x1aad454e, 0x00000025, 0x000002b2, 0xc3f6315c, 0x5c7a35b3, 0x10137a3c},
632 {0xa4fec9a6, 0x00000000, 0x000006d6, 0x90be5080, 0xa4107605, 0xaa9d6c73},
633 {0x1bbe71e2, 0x0000001f, 0x000002fd, 0x4e504c3b, 0x284ccaf1, 0xb63d23e7},
634 {0x4201c7e4, 0x00000002, 0x000002b7, 0x7822e3f9, 0x0cc912a9, 0x7f53e9cf},
635 {0x23fddc96, 0x00000003, 0x00000627, 0x8a385125, 0x07767e78, 0x13c1cd83},
636 {0xd82ba25c, 0x00000016, 0x0000063e, 0x98e4148a, 0x283330c9, 0x49ff5867},
637 {0x786f2032, 0x0000002d, 0x0000060f, 0xf201600a, 0xf561bfcd, 0x8467f211},
638 {0xfebe4e1f, 0x0000002a, 0x000004f2, 0x95e51961, 0xfd80dcab, 0x3f9683b2},
639 {0x1a6e0a39, 0x00000008, 0x00000672, 0x8af6c2a5, 0x78dd84cb, 0x76a3f874},
640 {0x56000ab8, 0x0000000e, 0x000000e5, 0x36bacb8f, 0x22ee1f77, 0x863b702f},
641 {0x4717fe0c, 0x00000000, 0x000006ec, 0x8439f342, 0x5c8e03da, 0xdc6c58ff},
642 {0xd5d5d68e, 0x0000003c, 0x000003a3, 0x46fff083, 0x177d1b39, 0x0622cc95},
643 {0xc25dd6c6, 0x00000024, 0x000006c0, 0x5ceb8eb4, 0x892b0d16, 0xe85605cd},
644 {0xe9b11300, 0x00000023, 0x00000683, 0x07a5d59a, 0x6c6a3208, 0x31da5f06},
645 {0x95cd285e, 0x00000001, 0x00000047, 0x7b3a4368, 0x0202c07e, 0xa1f2e784},
646 {0xd9245a25, 0x0000001e, 0x000003a6, 0xd33c1841, 0x1936c0d5, 0xb07cc616},
647 {0x103279db, 0x00000006, 0x0000039b, 0xca09b8a0, 0x77d62892, 0xbf943b6c},
648 {0x1cba3172, 0x00000027, 0x000001c8, 0xcb377194, 0xebe682db, 0x2c01af1c},
649 {0x8f613739, 0x0000000c, 0x000001df, 0xb4b0bc87, 0x7710bd43, 0x0fe5f56d},
650 {0x1c6aa90d, 0x0000001b, 0x0000053c, 0x70559245, 0xda7894ac, 0xf8943b2d},
651 {0xaabe5b93, 0x0000003d, 0x00000715, 0xcdbf42fa, 0x0c3b99e7, 0xe4d89272},
652 {0xf15dd038, 0x00000006, 0x000006db, 0x6e104aea, 0x8d5967f2, 0x7c2f6bbb},
653 {0x584dd49c, 0x00000020, 0x000007bc, 0x36b6cfd6, 0xad4e23b2, 0xabbf388b},
654 {0x5d8c9506, 0x00000020, 0x00000470, 0x4c62378e, 0x31d92640, 0x1dca1f4e},
655 {0xb80d17b0, 0x00000032, 0x00000346, 0x22a5bb88, 0x9a7ec89f, 0x5c170e23},
656 {0xdaf0592e, 0x00000023, 0x000007b0, 0x3cab3f99, 0x9b1fdd99, 0xc0e9d672},
657 {0x4793cc85, 0x0000000d, 0x00000706, 0xe82e04f6, 0xed3db6b7, 0xc18bdc86},
658 {0x82ebf64e, 0x00000009, 0x000007c3, 0x69d590a9, 0x9efa8499, 0xa874fcdd},
659 {0xb18a0319, 0x00000026, 0x000007db, 0x1cf98dcc, 0x8fa9ad6a, 0x9dc0bb48},
660};
661
662#include <linux/time.h>
663
664static int __init crc32c_test(void)
665{
666 int i;
667 int errors = 0;
668 int bytes = 0;
669 u64 nsec;
670 unsigned long flags;
671
672 /* keep static to prevent cache warming code from
673 * getting eliminated by the compiler */
674 static u32 crc;
675
676 /* pre-warm the cache */
677 for (i = 0; i < 100; i++) {
678 bytes += test[i].length;
679
680 crc ^= __crc32c_le(crc: test[i].crc, p: test_buf +
681 test[i].start, len: test[i].length);
682 }
683
684 /* reduce OS noise */
685 local_irq_save(flags);
686
687 nsec = ktime_get_ns();
688 for (i = 0; i < 100; i++) {
689 if (test[i].crc32c_le != __crc32c_le(crc: test[i].crc, p: test_buf +
690 test[i].start, len: test[i].length))
691 errors++;
692 }
693 nsec = ktime_get_ns() - nsec;
694
695 local_irq_restore(flags);
696
697 pr_info("crc32c: CRC_LE_BITS = %d\n", CRC_LE_BITS);
698
699 if (errors)
700 pr_warn("crc32c: %d self tests failed\n", errors);
701 else {
702 pr_info("crc32c: self tests passed, processed %d bytes in %lld nsec\n",
703 bytes, nsec);
704 }
705
706 return 0;
707}
708
709static int __init crc32c_combine_test(void)
710{
711 int i, j;
712 int errors = 0, runs = 0;
713
714 for (i = 0; i < 10; i++) {
715 u32 crc_full;
716
717 crc_full = __crc32c_le(crc: test[i].crc, p: test_buf + test[i].start,
718 len: test[i].length);
719 for (j = 0; j <= test[i].length; ++j) {
720 u32 crc1, crc2;
721 u32 len1 = j, len2 = test[i].length - j;
722
723 crc1 = __crc32c_le(crc: test[i].crc, p: test_buf +
724 test[i].start, len: len1);
725 crc2 = __crc32c_le(crc: 0, p: test_buf + test[i].start +
726 len1, len: len2);
727
728 if (!(crc_full == __crc32c_le_combine(crc1, crc2, len2) &&
729 crc_full == test[i].crc32c_le))
730 errors++;
731 runs++;
732 cond_resched();
733 }
734 }
735
736 if (errors)
737 pr_warn("crc32c_combine: %d/%d self tests failed\n", errors, runs);
738 else
739 pr_info("crc32c_combine: %d self tests passed\n", runs);
740
741 return 0;
742}
743
744static int __init crc32_test(void)
745{
746 int i;
747 int errors = 0;
748 int bytes = 0;
749 u64 nsec;
750 unsigned long flags;
751
752 /* keep static to prevent cache warming code from
753 * getting eliminated by the compiler */
754 static u32 crc;
755
756 /* pre-warm the cache */
757 for (i = 0; i < 100; i++) {
758 bytes += 2*test[i].length;
759
760 crc ^= crc32_le(crc: test[i].crc, p: test_buf +
761 test[i].start, len: test[i].length);
762
763 crc ^= crc32_be(crc: test[i].crc, p: test_buf +
764 test[i].start, len: test[i].length);
765 }
766
767 /* reduce OS noise */
768 local_irq_save(flags);
769
770 nsec = ktime_get_ns();
771 for (i = 0; i < 100; i++) {
772 if (test[i].crc_le != crc32_le(crc: test[i].crc, p: test_buf +
773 test[i].start, len: test[i].length))
774 errors++;
775
776 if (test[i].crc_be != crc32_be(crc: test[i].crc, p: test_buf +
777 test[i].start, len: test[i].length))
778 errors++;
779 }
780 nsec = ktime_get_ns() - nsec;
781
782 local_irq_restore(flags);
783
784 pr_info("crc32: CRC_LE_BITS = %d, CRC_BE BITS = %d\n",
785 CRC_LE_BITS, CRC_BE_BITS);
786
787 if (errors)
788 pr_warn("crc32: %d self tests failed\n", errors);
789 else {
790 pr_info("crc32: self tests passed, processed %d bytes in %lld nsec\n",
791 bytes, nsec);
792 }
793
794 return 0;
795}
796
797static int __init crc32_combine_test(void)
798{
799 int i, j;
800 int errors = 0, runs = 0;
801
802 for (i = 0; i < 10; i++) {
803 u32 crc_full;
804
805 crc_full = crc32_le(crc: test[i].crc, p: test_buf + test[i].start,
806 len: test[i].length);
807 for (j = 0; j <= test[i].length; ++j) {
808 u32 crc1, crc2;
809 u32 len1 = j, len2 = test[i].length - j;
810
811 crc1 = crc32_le(crc: test[i].crc, p: test_buf +
812 test[i].start, len: len1);
813 crc2 = crc32_le(crc: 0, p: test_buf + test[i].start +
814 len1, len: len2);
815
816 if (!(crc_full == crc32_le_combine(crc1, crc2, len2) &&
817 crc_full == test[i].crc_le))
818 errors++;
819 runs++;
820 cond_resched();
821 }
822 }
823
824 if (errors)
825 pr_warn("crc32_combine: %d/%d self tests failed\n", errors, runs);
826 else
827 pr_info("crc32_combine: %d self tests passed\n", runs);
828
829 return 0;
830}
831
832static int __init crc32test_init(void)
833{
834 crc32_test();
835 crc32c_test();
836
837 crc32_combine_test();
838 crc32c_combine_test();
839
840 return 0;
841}
842
843static void __exit crc32_exit(void)
844{
845}
846
847module_init(crc32test_init);
848module_exit(crc32_exit);
849
850MODULE_AUTHOR("Matt Domsch <Matt_Domsch@dell.com>");
851MODULE_DESCRIPTION("CRC32 selftest");
852MODULE_LICENSE("GPL");
853

source code of linux/lib/crc32test.c