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 /* see: Documentation/crc32.txt for a description of algorithms */ 28 29 #include <linux/crc32.h> 30 #include <linux/module.h> 31 #include <linux/types.h> 32 #include "crc32defs.h" 33 34 #if CRC_LE_BITS > 8 35 # define tole(x) ((__force u32) __constant_cpu_to_le32(x)) 36 #else 37 # define tole(x) (x) 38 #endif 39 40 #if CRC_BE_BITS > 8 41 # define tobe(x) ((__force u32) __constant_cpu_to_be32(x)) 42 #else 43 # define tobe(x) (x) 44 #endif 45 46 #include "crc32table.h" 47 48 MODULE_AUTHOR("Matt Domsch <Matt_Domsch@dell.com>"); 49 MODULE_DESCRIPTION("Various CRC32 calculations"); 50 MODULE_LICENSE("GPL"); 51 52 #if CRC_LE_BITS > 8 || CRC_BE_BITS > 8 53 54 /* implements slicing-by-4 or slicing-by-8 algorithm */ 55 static inline u32 56 crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256]) 57 { 58 # ifdef __LITTLE_ENDIAN 59 # define DO_CRC(x) crc = t0[(crc ^ (x)) & 255] ^ (crc >> 8) 60 # define DO_CRC4 (t3[(q) & 255] ^ t2[(q >> 8) & 255] ^ \ 61 t1[(q >> 16) & 255] ^ t0[(q >> 24) & 255]) 62 # define DO_CRC8 (t7[(q) & 255] ^ t6[(q >> 8) & 255] ^ \ 63 t5[(q >> 16) & 255] ^ t4[(q >> 24) & 255]) 64 # else 65 # define DO_CRC(x) crc = t0[((crc >> 24) ^ (x)) & 255] ^ (crc << 8) 66 # define DO_CRC4 (t0[(q) & 255] ^ t1[(q >> 8) & 255] ^ \ 67 t2[(q >> 16) & 255] ^ t3[(q >> 24) & 255]) 68 # define DO_CRC8 (t4[(q) & 255] ^ t5[(q >> 8) & 255] ^ \ 69 t6[(q >> 16) & 255] ^ t7[(q >> 24) & 255]) 70 # endif 71 const u32 *b; 72 size_t rem_len; 73 # ifdef CONFIG_X86 74 size_t i; 75 # endif 76 const u32 *t0=tab[0], *t1=tab[1], *t2=tab[2], *t3=tab[3]; 77 # if CRC_LE_BITS != 32 78 const u32 *t4 = tab[4], *t5 = tab[5], *t6 = tab[6], *t7 = tab[7]; 79 # endif 80 u32 q; 81 82 /* Align it */ 83 if (unlikely((long)buf & 3 && len)) { 84 do { 85 DO_CRC(*buf++); 86 } while ((--len) && ((long)buf)&3); 87 } 88 89 # if CRC_LE_BITS == 32 90 rem_len = len & 3; 91 len = len >> 2; 92 # else 93 rem_len = len & 7; 94 len = len >> 3; 95 # endif 96 97 b = (const u32 *)buf; 98 # ifdef CONFIG_X86 99 --b; 100 for (i = 0; i < len; i++) { 101 # else 102 for (--b; len; --len) { 103 # endif 104 q = crc ^ *++b; /* use pre increment for speed */ 105 # if CRC_LE_BITS == 32 106 crc = DO_CRC4; 107 # else 108 crc = DO_CRC8; 109 q = *++b; 110 crc ^= DO_CRC4; 111 # endif 112 } 113 len = rem_len; 114 /* And the last few bytes */ 115 if (len) { 116 u8 *p = (u8 *)(b + 1) - 1; 117 # ifdef CONFIG_X86 118 for (i = 0; i < len; i++) 119 DO_CRC(*++p); /* use pre increment for speed */ 120 # else 121 do { 122 DO_CRC(*++p); /* use pre increment for speed */ 123 } while (--len); 124 # endif 125 } 126 return crc; 127 #undef DO_CRC 128 #undef DO_CRC4 129 #undef DO_CRC8 130 } 131 #endif 132 133 /** 134 * crc32_le() - Calculate bitwise little-endian Ethernet AUTODIN II CRC32 135 * @crc: seed value for computation. ~0 for Ethernet, sometimes 0 for 136 * other uses, or the previous crc32 value if computing incrementally. 137 * @p: pointer to buffer over which CRC is run 138 * @len: length of buffer @p 139 */ 140 static inline u32 __pure crc32_le_generic(u32 crc, unsigned char const *p, 141 size_t len, const u32 (*tab)[256], 142 u32 polynomial) 143 { 144 #if CRC_LE_BITS == 1 145 int i; 146 while (len--) { 147 crc ^= *p++; 148 for (i = 0; i < 8; i++) 149 crc = (crc >> 1) ^ ((crc & 1) ? polynomial : 0); 150 } 151 # elif CRC_LE_BITS == 2 152 while (len--) { 153 crc ^= *p++; 154 crc = (crc >> 2) ^ tab[0][crc & 3]; 155 crc = (crc >> 2) ^ tab[0][crc & 3]; 156 crc = (crc >> 2) ^ tab[0][crc & 3]; 157 crc = (crc >> 2) ^ tab[0][crc & 3]; 158 } 159 # elif CRC_LE_BITS == 4 160 while (len--) { 161 crc ^= *p++; 162 crc = (crc >> 4) ^ tab[0][crc & 15]; 163 crc = (crc >> 4) ^ tab[0][crc & 15]; 164 } 165 # elif CRC_LE_BITS == 8 166 /* aka Sarwate algorithm */ 167 while (len--) { 168 crc ^= *p++; 169 crc = (crc >> 8) ^ tab[0][crc & 255]; 170 } 171 # else 172 crc = (__force u32) __cpu_to_le32(crc); 173 crc = crc32_body(crc, p, len, tab); 174 crc = __le32_to_cpu((__force __le32)crc); 175 #endif 176 return crc; 177 } 178 179 #if CRC_LE_BITS == 1 180 u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len) 181 { 182 return crc32_le_generic(crc, p, len, NULL, CRCPOLY_LE); 183 } 184 u32 __pure __crc32c_le(u32 crc, unsigned char const *p, size_t len) 185 { 186 return crc32_le_generic(crc, p, len, NULL, CRC32C_POLY_LE); 187 } 188 #else 189 u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len) 190 { 191 return crc32_le_generic(crc, p, len, crc32table_le, CRCPOLY_LE); 192 } 193 u32 __pure __crc32c_le(u32 crc, unsigned char const *p, size_t len) 194 { 195 return crc32_le_generic(crc, p, len, crc32ctable_le, CRC32C_POLY_LE); 196 } 197 #endif 198 EXPORT_SYMBOL(crc32_le); 199 EXPORT_SYMBOL(__crc32c_le); 200 201 /** 202 * crc32_be() - Calculate bitwise big-endian Ethernet AUTODIN II CRC32 203 * @crc: seed value for computation. ~0 for Ethernet, sometimes 0 for 204 * other uses, or the previous crc32 value if computing incrementally. 205 * @p: pointer to buffer over which CRC is run 206 * @len: length of buffer @p 207 */ 208 static inline u32 __pure crc32_be_generic(u32 crc, unsigned char const *p, 209 size_t len, const u32 (*tab)[256], 210 u32 polynomial) 211 { 212 #if CRC_BE_BITS == 1 213 int i; 214 while (len--) { 215 crc ^= *p++ << 24; 216 for (i = 0; i < 8; i++) 217 crc = 218 (crc << 1) ^ ((crc & 0x80000000) ? polynomial : 219 0); 220 } 221 # elif CRC_BE_BITS == 2 222 while (len--) { 223 crc ^= *p++ << 24; 224 crc = (crc << 2) ^ tab[0][crc >> 30]; 225 crc = (crc << 2) ^ tab[0][crc >> 30]; 226 crc = (crc << 2) ^ tab[0][crc >> 30]; 227 crc = (crc << 2) ^ tab[0][crc >> 30]; 228 } 229 # elif CRC_BE_BITS == 4 230 while (len--) { 231 crc ^= *p++ << 24; 232 crc = (crc << 4) ^ tab[0][crc >> 28]; 233 crc = (crc << 4) ^ tab[0][crc >> 28]; 234 } 235 # elif CRC_BE_BITS == 8 236 while (len--) { 237 crc ^= *p++ << 24; 238 crc = (crc << 8) ^ tab[0][crc >> 24]; 239 } 240 # else 241 crc = (__force u32) __cpu_to_be32(crc); 242 crc = crc32_body(crc, p, len, tab); 243 crc = __be32_to_cpu((__force __be32)crc); 244 # endif 245 return crc; 246 } 247 248 #if CRC_LE_BITS == 1 249 u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len) 250 { 251 return crc32_be_generic(crc, p, len, NULL, CRCPOLY_BE); 252 } 253 #else 254 u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len) 255 { 256 return crc32_be_generic(crc, p, len, crc32table_be, CRCPOLY_BE); 257 } 258 #endif 259 EXPORT_SYMBOL(crc32_be); 260 261 #ifdef CONFIG_CRC32_SELFTEST 262 263 /* 4096 random bytes */ 264 static u8 __attribute__((__aligned__(8))) test_buf[] = 265 { 266 0x5b, 0x85, 0x21, 0xcb, 0x09, 0x68, 0x7d, 0x30, 267 0xc7, 0x69, 0xd7, 0x30, 0x92, 0xde, 0x59, 0xe4, 268 0xc9, 0x6e, 0x8b, 0xdb, 0x98, 0x6b, 0xaa, 0x60, 269 0xa8, 0xb5, 0xbc, 0x6c, 0xa9, 0xb1, 0x5b, 0x2c, 270 0xea, 0xb4, 0x92, 0x6a, 0x3f, 0x79, 0x91, 0xe4, 271 0xe9, 0x70, 0x51, 0x8c, 0x7f, 0x95, 0x6f, 0x1a, 272 0x56, 0xa1, 0x5c, 0x27, 0x03, 0x67, 0x9f, 0x3a, 273 0xe2, 0x31, 0x11, 0x29, 0x6b, 0x98, 0xfc, 0xc4, 274 0x53, 0x24, 0xc5, 0x8b, 0xce, 0x47, 0xb2, 0xb9, 275 0x32, 0xcb, 0xc1, 0xd0, 0x03, 0x57, 0x4e, 0xd4, 276 0xe9, 0x3c, 0xa1, 0x63, 0xcf, 0x12, 0x0e, 0xca, 277 0xe1, 0x13, 0xd1, 0x93, 0xa6, 0x88, 0x5c, 0x61, 278 0x5b, 0xbb, 0xf0, 0x19, 0x46, 0xb4, 0xcf, 0x9e, 279 0xb6, 0x6b, 0x4c, 0x3a, 0xcf, 0x60, 0xf9, 0x7a, 280 0x8d, 0x07, 0x63, 0xdb, 0x40, 0xe9, 0x0b, 0x6f, 281 0xad, 0x97, 0xf1, 0xed, 0xd0, 0x1e, 0x26, 0xfd, 282 0xbf, 0xb7, 0xc8, 0x04, 0x94, 0xf8, 0x8b, 0x8c, 283 0xf1, 0xab, 0x7a, 0xd4, 0xdd, 0xf3, 0xe8, 0x88, 284 0xc3, 0xed, 0x17, 0x8a, 0x9b, 0x40, 0x0d, 0x53, 285 0x62, 0x12, 0x03, 0x5f, 0x1b, 0x35, 0x32, 0x1f, 286 0xb4, 0x7b, 0x93, 0x78, 0x0d, 0xdb, 0xce, 0xa4, 287 0xc0, 0x47, 0xd5, 0xbf, 0x68, 0xe8, 0x5d, 0x74, 288 0x8f, 0x8e, 0x75, 0x1c, 0xb2, 0x4f, 0x9a, 0x60, 289 0xd1, 0xbe, 0x10, 0xf4, 0x5c, 0xa1, 0x53, 0x09, 290 0xa5, 0xe0, 0x09, 0x54, 0x85, 0x5c, 0xdc, 0x07, 291 0xe7, 0x21, 0x69, 0x7b, 0x8a, 0xfd, 0x90, 0xf1, 292 0x22, 0xd0, 0xb4, 0x36, 0x28, 0xe6, 0xb8, 0x0f, 293 0x39, 0xde, 0xc8, 0xf3, 0x86, 0x60, 0x34, 0xd2, 294 0x5e, 0xdf, 0xfd, 0xcf, 0x0f, 0xa9, 0x65, 0xf0, 295 0xd5, 0x4d, 0x96, 0x40, 0xe3, 0xdf, 0x3f, 0x95, 296 0x5a, 0x39, 0x19, 0x93, 0xf4, 0x75, 0xce, 0x22, 297 0x00, 0x1c, 0x93, 0xe2, 0x03, 0x66, 0xf4, 0x93, 298 0x73, 0x86, 0x81, 0x8e, 0x29, 0x44, 0x48, 0x86, 299 0x61, 0x7c, 0x48, 0xa3, 0x43, 0xd2, 0x9c, 0x8d, 300 0xd4, 0x95, 0xdd, 0xe1, 0x22, 0x89, 0x3a, 0x40, 301 0x4c, 0x1b, 0x8a, 0x04, 0xa8, 0x09, 0x69, 0x8b, 302 0xea, 0xc6, 0x55, 0x8e, 0x57, 0xe6, 0x64, 0x35, 303 0xf0, 0xc7, 0x16, 0x9f, 0x5d, 0x5e, 0x86, 0x40, 304 0x46, 0xbb, 0xe5, 0x45, 0x88, 0xfe, 0xc9, 0x63, 305 0x15, 0xfb, 0xf5, 0xbd, 0x71, 0x61, 0xeb, 0x7b, 306 0x78, 0x70, 0x07, 0x31, 0x03, 0x9f, 0xb2, 0xc8, 307 0xa7, 0xab, 0x47, 0xfd, 0xdf, 0xa0, 0x78, 0x72, 308 0xa4, 0x2a, 0xe4, 0xb6, 0xba, 0xc0, 0x1e, 0x86, 309 0x71, 0xe6, 0x3d, 0x18, 0x37, 0x70, 0xe6, 0xff, 310 0xe0, 0xbc, 0x0b, 0x22, 0xa0, 0x1f, 0xd3, 0xed, 311 0xa2, 0x55, 0x39, 0xab, 0xa8, 0x13, 0x73, 0x7c, 312 0x3f, 0xb2, 0xd6, 0x19, 0xac, 0xff, 0x99, 0xed, 313 0xe8, 0xe6, 0xa6, 0x22, 0xe3, 0x9c, 0xf1, 0x30, 314 0xdc, 0x01, 0x0a, 0x56, 0xfa, 0xe4, 0xc9, 0x99, 315 0xdd, 0xa8, 0xd8, 0xda, 0x35, 0x51, 0x73, 0xb4, 316 0x40, 0x86, 0x85, 0xdb, 0x5c, 0xd5, 0x85, 0x80, 317 0x14, 0x9c, 0xfd, 0x98, 0xa9, 0x82, 0xc5, 0x37, 318 0xff, 0x32, 0x5d, 0xd0, 0x0b, 0xfa, 0xdc, 0x04, 319 0x5e, 0x09, 0xd2, 0xca, 0x17, 0x4b, 0x1a, 0x8e, 320 0x15, 0xe1, 0xcc, 0x4e, 0x52, 0x88, 0x35, 0xbd, 321 0x48, 0xfe, 0x15, 0xa0, 0x91, 0xfd, 0x7e, 0x6c, 322 0x0e, 0x5d, 0x79, 0x1b, 0x81, 0x79, 0xd2, 0x09, 323 0x34, 0x70, 0x3d, 0x81, 0xec, 0xf6, 0x24, 0xbb, 324 0xfb, 0xf1, 0x7b, 0xdf, 0x54, 0xea, 0x80, 0x9b, 325 0xc7, 0x99, 0x9e, 0xbd, 0x16, 0x78, 0x12, 0x53, 326 0x5e, 0x01, 0xa7, 0x4e, 0xbd, 0x67, 0xe1, 0x9b, 327 0x4c, 0x0e, 0x61, 0x45, 0x97, 0xd2, 0xf0, 0x0f, 328 0xfe, 0x15, 0x08, 0xb7, 0x11, 0x4c, 0xe7, 0xff, 329 0x81, 0x53, 0xff, 0x91, 0x25, 0x38, 0x7e, 0x40, 330 0x94, 0xe5, 0xe0, 0xad, 0xe6, 0xd9, 0x79, 0xb6, 331 0x92, 0xc9, 0xfc, 0xde, 0xc3, 0x1a, 0x23, 0xbb, 332 0xdd, 0xc8, 0x51, 0x0c, 0x3a, 0x72, 0xfa, 0x73, 333 0x6f, 0xb7, 0xee, 0x61, 0x39, 0x03, 0x01, 0x3f, 334 0x7f, 0x94, 0x2e, 0x2e, 0xba, 0x3a, 0xbb, 0xb4, 335 0xfa, 0x6a, 0x17, 0xfe, 0xea, 0xef, 0x5e, 0x66, 336 0x97, 0x3f, 0x32, 0x3d, 0xd7, 0x3e, 0xb1, 0xf1, 337 0x6c, 0x14, 0x4c, 0xfd, 0x37, 0xd3, 0x38, 0x80, 338 0xfb, 0xde, 0xa6, 0x24, 0x1e, 0xc8, 0xca, 0x7f, 339 0x3a, 0x93, 0xd8, 0x8b, 0x18, 0x13, 0xb2, 0xe5, 340 0xe4, 0x93, 0x05, 0x53, 0x4f, 0x84, 0x66, 0xa7, 341 0x58, 0x5c, 0x7b, 0x86, 0x52, 0x6d, 0x0d, 0xce, 342 0xa4, 0x30, 0x7d, 0xb6, 0x18, 0x9f, 0xeb, 0xff, 343 0x22, 0xbb, 0x72, 0x29, 0xb9, 0x44, 0x0b, 0x48, 344 0x1e, 0x84, 0x71, 0x81, 0xe3, 0x6d, 0x73, 0x26, 345 0x92, 0xb4, 0x4d, 0x2a, 0x29, 0xb8, 0x1f, 0x72, 346 0xed, 0xd0, 0xe1, 0x64, 0x77, 0xea, 0x8e, 0x88, 347 0x0f, 0xef, 0x3f, 0xb1, 0x3b, 0xad, 0xf9, 0xc9, 348 0x8b, 0xd0, 0xac, 0xc6, 0xcc, 0xa9, 0x40, 0xcc, 349 0x76, 0xf6, 0x3b, 0x53, 0xb5, 0x88, 0xcb, 0xc8, 350 0x37, 0xf1, 0xa2, 0xba, 0x23, 0x15, 0x99, 0x09, 351 0xcc, 0xe7, 0x7a, 0x3b, 0x37, 0xf7, 0x58, 0xc8, 352 0x46, 0x8c, 0x2b, 0x2f, 0x4e, 0x0e, 0xa6, 0x5c, 353 0xea, 0x85, 0x55, 0xba, 0x02, 0x0e, 0x0e, 0x48, 354 0xbc, 0xe1, 0xb1, 0x01, 0x35, 0x79, 0x13, 0x3d, 355 0x1b, 0xc0, 0x53, 0x68, 0x11, 0xe7, 0x95, 0x0f, 356 0x9d, 0x3f, 0x4c, 0x47, 0x7b, 0x4d, 0x1c, 0xae, 357 0x50, 0x9b, 0xcb, 0xdd, 0x05, 0x8d, 0x9a, 0x97, 358 0xfd, 0x8c, 0xef, 0x0c, 0x1d, 0x67, 0x73, 0xa8, 359 0x28, 0x36, 0xd5, 0xb6, 0x92, 0x33, 0x40, 0x75, 360 0x0b, 0x51, 0xc3, 0x64, 0xba, 0x1d, 0xc2, 0xcc, 361 0xee, 0x7d, 0x54, 0x0f, 0x27, 0x69, 0xa7, 0x27, 362 0x63, 0x30, 0x29, 0xd9, 0xc8, 0x84, 0xd8, 0xdf, 363 0x9f, 0x68, 0x8d, 0x04, 0xca, 0xa6, 0xc5, 0xc7, 364 0x7a, 0x5c, 0xc8, 0xd1, 0xcb, 0x4a, 0xec, 0xd0, 365 0xd8, 0x20, 0x69, 0xc5, 0x17, 0xcd, 0x78, 0xc8, 366 0x75, 0x23, 0x30, 0x69, 0xc9, 0xd4, 0xea, 0x5c, 367 0x4f, 0x6b, 0x86, 0x3f, 0x8b, 0xfe, 0xee, 0x44, 368 0xc9, 0x7c, 0xb7, 0xdd, 0x3e, 0xe5, 0xec, 0x54, 369 0x03, 0x3e, 0xaa, 0x82, 0xc6, 0xdf, 0xb2, 0x38, 370 0x0e, 0x5d, 0xb3, 0x88, 0xd9, 0xd3, 0x69, 0x5f, 371 0x8f, 0x70, 0x8a, 0x7e, 0x11, 0xd9, 0x1e, 0x7b, 372 0x38, 0xf1, 0x42, 0x1a, 0xc0, 0x35, 0xf5, 0xc7, 373 0x36, 0x85, 0xf5, 0xf7, 0xb8, 0x7e, 0xc7, 0xef, 374 0x18, 0xf1, 0x63, 0xd6, 0x7a, 0xc6, 0xc9, 0x0e, 375 0x4d, 0x69, 0x4f, 0x84, 0xef, 0x26, 0x41, 0x0c, 376 0xec, 0xc7, 0xe0, 0x7e, 0x3c, 0x67, 0x01, 0x4c, 377 0x62, 0x1a, 0x20, 0x6f, 0xee, 0x47, 0x4d, 0xc0, 378 0x99, 0x13, 0x8d, 0x91, 0x4a, 0x26, 0xd4, 0x37, 379 0x28, 0x90, 0x58, 0x75, 0x66, 0x2b, 0x0a, 0xdf, 380 0xda, 0xee, 0x92, 0x25, 0x90, 0x62, 0x39, 0x9e, 381 0x44, 0x98, 0xad, 0xc1, 0x88, 0xed, 0xe4, 0xb4, 382 0xaf, 0xf5, 0x8c, 0x9b, 0x48, 0x4d, 0x56, 0x60, 383 0x97, 0x0f, 0x61, 0x59, 0x9e, 0xa6, 0x27, 0xfe, 384 0xc1, 0x91, 0x15, 0x38, 0xb8, 0x0f, 0xae, 0x61, 385 0x7d, 0x26, 0x13, 0x5a, 0x73, 0xff, 0x1c, 0xa3, 386 0x61, 0x04, 0x58, 0x48, 0x55, 0x44, 0x11, 0xfe, 387 0x15, 0xca, 0xc3, 0xbd, 0xca, 0xc5, 0xb4, 0x40, 388 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0xb4, 0x47, 619 0x1e, 0x20, 0xad, 0xd8, 0xf2, 0x31, 0xdd, 0xc4, 620 0x8b, 0x0c, 0x77, 0xbe, 0xe1, 0x8b, 0x26, 0x00, 621 0x02, 0x58, 0xd6, 0x8d, 0xef, 0xad, 0x74, 0x67, 622 0xab, 0x3f, 0xef, 0xcb, 0x6f, 0xb0, 0xcc, 0x81, 623 0x44, 0x4c, 0xaf, 0xe9, 0x49, 0x4f, 0xdb, 0xa0, 624 0x25, 0xa4, 0xf0, 0x89, 0xf1, 0xbe, 0xd8, 0x10, 625 0xff, 0xb1, 0x3b, 0x4b, 0xfa, 0x98, 0xf5, 0x79, 626 0x6d, 0x1e, 0x69, 0x4d, 0x57, 0xb1, 0xc8, 0x19, 627 0x1b, 0xbd, 0x1e, 0x8c, 0x84, 0xb7, 0x7b, 0xe8, 628 0xd2, 0x2d, 0x09, 0x41, 0x41, 0x37, 0x3d, 0xb1, 629 0x6f, 0x26, 0x5d, 0x71, 0x16, 0x3d, 0xb7, 0x83, 630 0x27, 0x2c, 0xa7, 0xb6, 0x50, 0xbd, 0x91, 0x86, 631 0xab, 0x24, 0xa1, 0x38, 0xfd, 0xea, 0x71, 0x55, 632 0x7e, 0x9a, 0x07, 0x77, 0x4b, 0xfa, 0x61, 0x66, 633 0x20, 0x1e, 0x28, 0x95, 0x18, 0x1b, 0xa4, 0xa0, 634 0xfd, 0xc0, 0x89, 0x72, 0x43, 0xd9, 0x3b, 0x49, 635 0x5a, 0x3f, 0x9d, 0xbf, 0xdb, 0xb4, 0x46, 0xea, 636 0x42, 0x01, 0x77, 0x23, 0x68, 0x95, 0xb6, 0x24, 637 0xb3, 0xa8, 0x6c, 0x28, 0x3b, 0x11, 0x40, 0x7e, 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0x4e, 0x6c, 0xd7, 0xf4, 0xaf, 677 0x7a, 0xbb, 0x61, 0x82, 0xfe, 0x71, 0x89, 0xb2, 678 0x22, 0x7c, 0x8e, 0x83, 0x04, 0xce, 0xf6, 0x5d, 679 0x84, 0x8f, 0x95, 0x6a, 0x7f, 0xad, 0xfd, 0x32, 680 0x9c, 0x5e, 0xe4, 0x9c, 0x89, 0x60, 0x54, 0xaa, 681 0x96, 0x72, 0xd2, 0xd7, 0x36, 0x85, 0xa9, 0x45, 682 0xd2, 0x2a, 0xa1, 0x81, 0x49, 0x6f, 0x7e, 0x04, 683 0xfa, 0xe2, 0xfe, 0x90, 0x26, 0x77, 0x5a, 0x33, 684 0xb8, 0x04, 0x9a, 0x7a, 0xe6, 0x4c, 0x4f, 0xad, 685 0x72, 0x96, 0x08, 0x28, 0x58, 0x13, 0xf8, 0xc4, 686 0x1c, 0xf0, 0xc3, 0x45, 0x95, 0x49, 0x20, 0x8c, 687 0x9f, 0x39, 0x70, 0xe1, 0x77, 0xfe, 0xd5, 0x4b, 688 0xaf, 0x86, 0xda, 0xef, 0x22, 0x06, 0x83, 0x36, 689 0x29, 0x12, 0x11, 0x40, 0xbc, 0x3b, 0x86, 0xaa, 690 0xaa, 0x65, 0x60, 0xc3, 0x80, 0xca, 0xed, 0xa9, 691 0xf3, 0xb0, 0x79, 0x96, 0xa2, 0x55, 0x27, 0x28, 692 0x55, 0x73, 0x26, 0xa5, 0x50, 0xea, 0x92, 0x4b, 693 0x3c, 0x5c, 0x82, 0x33, 0xf0, 0x01, 0x3f, 0x03, 694 0xc1, 0x08, 0x05, 0xbf, 0x98, 0xf4, 0x9b, 0x6d, 695 0xa5, 0xa8, 0xb4, 0x82, 0x0c, 0x06, 0xfa, 0xff, 696 0x2d, 0x08, 0xf3, 0x05, 0x4f, 0x57, 0x2a, 0x39, 697 0xd4, 0x83, 0x0d, 0x75, 0x51, 0xd8, 0x5b, 0x1b, 698 0xd3, 0x51, 0x5a, 0x32, 0x2a, 0x9b, 0x32, 0xb2, 699 0xf2, 0xa4, 0x96, 0x12, 0xf2, 0xae, 0x40, 0x34, 700 0x67, 0xa8, 0xf5, 0x44, 0xd5, 0x35, 0x53, 0xfe, 701 0xa3, 0x60, 0x96, 0x63, 0x0f, 0x1f, 0x6e, 0xb0, 702 0x5a, 0x42, 0xa6, 0xfc, 0x51, 0x0b, 0x60, 0x27, 703 0xbc, 0x06, 0x71, 0xed, 0x65, 0x5b, 0x23, 0x86, 704 0x4a, 0x07, 0x3b, 0x22, 0x07, 0x46, 0xe6, 0x90, 705 0x3e, 0xf3, 0x25, 0x50, 0x1b, 0x4c, 0x7f, 0x03, 706 0x08, 0xa8, 0x36, 0x6b, 0x87, 0xe5, 0xe3, 0xdb, 707 0x9a, 0x38, 0x83, 0xff, 0x9f, 0x1a, 0x9f, 0x57, 708 0xa4, 0x2a, 0xf6, 0x37, 0xbc, 0x1a, 0xff, 0xc9, 709 0x1e, 0x35, 0x0c, 0xc3, 0x7c, 0xa3, 0xb2, 0xe5, 710 0xd2, 0xc6, 0xb4, 0x57, 0x47, 0xe4, 0x32, 0x16, 711 0x6d, 0xa9, 0xae, 0x64, 0xe6, 0x2d, 0x8d, 0xc5, 712 0x8d, 0x50, 0x8e, 0xe8, 0x1a, 0x22, 0x34, 0x2a, 713 0xd9, 0xeb, 0x51, 0x90, 0x4a, 0xb1, 0x41, 0x7d, 714 0x64, 0xf9, 0xb9, 0x0d, 0xf6, 0x23, 0x33, 0xb0, 715 0x33, 0xf4, 0xf7, 0x3f, 0x27, 0x84, 0xc6, 0x0f, 716 0x54, 0xa5, 0xc0, 0x2e, 0xec, 0x0b, 0x3a, 0x48, 717 0x6e, 0x80, 0x35, 0x81, 0x43, 0x9b, 0x90, 0xb1, 718 0xd0, 0x2b, 0xea, 0x21, 0xdc, 0xda, 0x5b, 0x09, 719 0xf4, 0xcc, 0x10, 0xb4, 0xc7, 0xfe, 0x79, 0x51, 720 0xc3, 0xc5, 0xac, 0x88, 0x74, 0x84, 0x0b, 0x4b, 721 0xca, 0x79, 0x16, 0x29, 0xfb, 0x69, 0x54, 0xdf, 722 0x41, 0x7e, 0xe9, 0xc7, 0x8e, 0xea, 0xa5, 0xfe, 723 0xfc, 0x76, 0x0e, 0x90, 0xc4, 0x92, 0x38, 0xad, 724 0x7b, 0x48, 0xe6, 0x6e, 0xf7, 0x21, 0xfd, 0x4e, 725 0x93, 0x0a, 0x7b, 0x41, 0x83, 0x68, 0xfb, 0x57, 726 0x51, 0x76, 0x34, 0xa9, 0x6c, 0x00, 0xaa, 0x4f, 727 0x66, 0x65, 0x98, 0x4a, 0x4f, 0xa3, 0xa0, 0xef, 728 0x69, 0x3f, 0xe3, 0x1c, 0x92, 0x8c, 0xfd, 0xd8, 729 0xe8, 0xde, 0x7c, 0x7f, 0x3e, 0x84, 0x8e, 0x69, 730 0x3c, 0xf1, 0xf2, 0x05, 0x46, 0xdc, 0x2f, 0x9d, 731 0x5e, 0x6e, 0x4c, 0xfb, 0xb5, 0x99, 0x2a, 0x59, 732 0x63, 0xc1, 0x34, 0xbc, 0x57, 0xc0, 0x0d, 0xb9, 733 0x61, 0x25, 0xf3, 0x33, 0x23, 0x51, 0xb6, 0x0d, 734 0x07, 0xa6, 0xab, 0x94, 0x4a, 0xb7, 0x2a, 0xea, 735 0xee, 0xac, 0xa3, 0xc3, 0x04, 0x8b, 0x0e, 0x56, 736 0xfe, 0x44, 0xa7, 0x39, 0xe2, 0xed, 0xed, 0xb4, 737 0x22, 0x2b, 0xac, 0x12, 0x32, 0x28, 0x91, 0xd8, 738 0xa5, 0xab, 0xff, 0x5f, 0xe0, 0x4b, 0xda, 0x78, 739 0x17, 0xda, 0xf1, 0x01, 0x5b, 0xcd, 0xe2, 0x5f, 740 0x50, 0x45, 0x73, 0x2b, 0xe4, 0x76, 0x77, 0xf4, 741 0x64, 0x1d, 0x43, 0xfb, 0x84, 0x7a, 0xea, 0x91, 742 0xae, 0xf9, 0x9e, 0xb7, 0xb4, 0xb0, 0x91, 0x5f, 743 0x16, 0x35, 0x9a, 0x11, 0xb8, 0xc7, 0xc1, 0x8c, 744 0xc6, 0x10, 0x8d, 0x2f, 0x63, 0x4a, 0xa7, 0x57, 745 0x3a, 0x51, 0xd6, 0x32, 0x2d, 0x64, 0x72, 0xd4, 746 0x66, 0xdc, 0x10, 0xa6, 0x67, 0xd6, 0x04, 0x23, 747 0x9d, 0x0a, 0x11, 0x77, 0xdd, 0x37, 0x94, 0x17, 748 0x3c, 0xbf, 0x8b, 0x65, 0xb0, 0x2e, 0x5e, 0x66, 749 0x47, 0x64, 0xac, 0xdd, 0xf0, 0x84, 0xfd, 0x39, 750 0xfa, 0x15, 0x5d, 0xef, 0xae, 0xca, 0xc1, 0x36, 751 0xa7, 0x5c, 0xbf, 0xc7, 0x08, 0xc2, 0x66, 0x00, 752 0x74, 0x74, 0x4e, 0x27, 0x3f, 0x55, 0x8a, 0xb7, 753 0x38, 0x66, 0x83, 0x6d, 0xcf, 0x99, 0x9e, 0x60, 754 0x8f, 0xdd, 0x2e, 0x62, 0x22, 0x0e, 0xef, 0x0c, 755 0x98, 0xa7, 0x85, 0x74, 0x3b, 0x9d, 0xec, 0x9e, 756 0xa9, 0x19, 0x72, 0xa5, 0x7f, 0x2c, 0x39, 0xb7, 757 0x7d, 0xb7, 0xf1, 0x12, 0x65, 0x27, 0x4b, 0x5a, 758 0xde, 0x17, 0xfe, 0xad, 0x44, 0xf3, 0x20, 0x4d, 759 0xfd, 0xe4, 0x1f, 0xb5, 0x81, 0xb0, 0x36, 0x37, 760 0x08, 0x6f, 0xc3, 0x0c, 0xe9, 0x85, 0x98, 0x82, 761 0xa9, 0x62, 0x0c, 0xc4, 0x97, 0xc0, 0x50, 0xc8, 762 0xa7, 0x3c, 0x50, 0x9f, 0x43, 0xb9, 0xcd, 0x5e, 763 0x4d, 0xfa, 0x1c, 0x4b, 0x0b, 0xa9, 0x98, 0x85, 764 0x38, 0x92, 0xac, 0x8d, 0xe4, 0xad, 0x9b, 0x98, 765 0xab, 0xd9, 0x38, 0xac, 0x62, 0x52, 0xa3, 0x22, 766 0x63, 0x0f, 0xbf, 0x95, 0x48, 0xdf, 0x69, 0xe7, 767 0x8b, 0x33, 0xd5, 0xb2, 0xbd, 0x05, 0x49, 0x49, 768 0x9d, 0x57, 0x73, 0x19, 0x33, 0xae, 0xfa, 0x33, 769 0xf1, 0x19, 0xa8, 0x80, 0xce, 0x04, 0x9f, 0xbc, 770 0x1d, 0x65, 0x82, 0x1b, 0xe5, 0x3a, 0x51, 0xc8, 771 0x1c, 0x21, 0xe3, 0x5d, 0xf3, 0x7d, 0x9b, 0x2f, 772 0x2c, 0x1d, 0x4a, 0x7f, 0x9b, 0x68, 0x35, 0xa3, 773 0xb2, 0x50, 0xf7, 0x62, 0x79, 0xcd, 0xf4, 0x98, 774 0x4f, 0xe5, 0x63, 0x7c, 0x3e, 0x45, 0x31, 0x8c, 775 0x16, 0xa0, 0x12, 0xc8, 0x58, 0xce, 0x39, 0xa6, 776 0xbc, 0x54, 0xdb, 0xc5, 0xe0, 0xd5, 0xba, 0xbc, 777 0xb9, 0x04, 0xf4, 0x8d, 0xe8, 0x2f, 0x15, 0x9d, 778 }; 779 780 /* 100 test cases */ 781 static struct crc_test { 782 u32 crc; /* random starting crc */ 783 u32 start; /* random 6 bit offset in buf */ 784 u32 length; /* random 11 bit length of test */ 785 u32 crc_le; /* expected crc32_le result */ 786 u32 crc_be; /* expected crc32_be result */ 787 u32 crc32c_le; /* expected crc32c_le result */ 788 } test[] = 789 { 790 {0x674bf11d, 0x00000038, 0x00000542, 0x0af6d466, 0xd8b6e4c1, 791 0xf6e93d6c}, 792 {0x35c672c6, 0x0000003a, 0x000001aa, 0xc6d3dfba, 0x28aaf3ad, 793 0x0fe92aca}, 794 {0x496da28e, 0x00000039, 0x000005af, 0xd933660f, 0x5d57e81f, 795 0x52e1ebb8}, 796 {0x09a9b90e, 0x00000027, 0x000001f8, 0xb45fe007, 0xf45fca9a, 797 0x0798af9a}, 798 {0xdc97e5a9, 0x00000025, 0x000003b6, 0xf81a3562, 0xe0126ba2, 799 0x18eb3152}, 800 {0x47c58900, 0x0000000a, 0x000000b9, 0x8e58eccf, 0xf3afc793, 801 0xd00d08c7}, 802 {0x292561e8, 0x0000000c, 0x00000403, 0xa2ba8aaf, 0x0b797aed, 803 0x8ba966bc}, 804 {0x415037f6, 0x00000003, 0x00000676, 0xa17d52e8, 0x7f0fdf35, 805 0x11d694a2}, 806 {0x3466e707, 0x00000026, 0x00000042, 0x258319be, 0x75c484a2, 807 0x6ab3208d}, 808 {0xafd1281b, 0x00000023, 0x000002ee, 0x4428eaf8, 0x06c7ad10, 809 0xba4603c5}, 810 {0xd3857b18, 0x00000028, 0x000004a2, 0x5c430821, 0xb062b7cb, 811 0xe6071c6f}, 812 {0x1d825a8f, 0x0000002b, 0x0000050b, 0xd2c45f0c, 0xd68634e0, 813 0x179ec30a}, 814 {0x5033e3bc, 0x0000000b, 0x00000078, 0xa3ea4113, 0xac6d31fb, 815 0x0903beb8}, 816 {0x94f1fb5e, 0x0000000f, 0x000003a2, 0xfbfc50b1, 0x3cfe50ed, 817 0x6a7cb4fa}, 818 {0xc9a0fe14, 0x00000009, 0x00000473, 0x5fb61894, 0x87070591, 819 0xdb535801}, 820 {0x88a034b1, 0x0000001c, 0x000005ad, 0xc1b16053, 0x46f95c67, 821 0x92bed597}, 822 {0xf0f72239, 0x00000020, 0x0000026d, 0xa6fa58f3, 0xf8c2c1dd, 823 0x192a3f1b}, 824 {0xcc20a5e3, 0x0000003b, 0x0000067a, 0x7740185a, 0x308b979a, 825 0xccbaec1a}, 826 {0xce589c95, 0x0000002b, 0x00000641, 0xd055e987, 0x40aae25b, 827 0x7eabae4d}, 828 {0x78edc885, 0x00000035, 0x000005be, 0xa39cb14b, 0x035b0d1f, 829 0x28c72982}, 830 {0x9d40a377, 0x0000003b, 0x00000038, 0x1f47ccd2, 0x197fbc9d, 831 0xc3cd4d18}, 832 {0x703d0e01, 0x0000003c, 0x000006f1, 0x88735e7c, 0xfed57c5a, 833 0xbca8f0e7}, 834 {0x776bf505, 0x0000000f, 0x000005b2, 0x5cc4fc01, 0xf32efb97, 835 0x713f60b3}, 836 {0x4a3e7854, 0x00000027, 0x000004b8, 0x8d923c82, 0x0cbfb4a2, 837 0xebd08fd5}, 838 {0x209172dd, 0x0000003b, 0x00000356, 0xb89e9c2b, 0xd7868138, 839 0x64406c59}, 840 {0x3ba4cc5b, 0x0000002f, 0x00000203, 0xe51601a9, 0x5b2a1032, 841 0x7421890e}, 842 {0xfc62f297, 0x00000000, 0x00000079, 0x71a8e1a2, 0x5d88685f, 843 0xe9347603}, 844 {0x64280b8b, 0x00000016, 0x000007ab, 0x0fa7a30c, 0xda3a455f, 845 0x1bef9060}, 846 {0x97dd724b, 0x00000033, 0x000007ad, 0x5788b2f4, 0xd7326d32, 847 0x34720072}, 848 {0x61394b52, 0x00000035, 0x00000571, 0xc66525f1, 0xcabe7fef, 849 0x48310f59}, 850 {0x29b4faff, 0x00000024, 0x0000006e, 0xca13751e, 0x993648e0, 851 0x783a4213}, 852 {0x29bfb1dc, 0x0000000b, 0x00000244, 0x436c43f7, 0x429f7a59, 853 0x9e8efd41}, 854 {0x86ae934b, 0x00000035, 0x00000104, 0x0760ec93, 0x9cf7d0f4, 855 0xfc3d34a5}, 856 {0xc4c1024e, 0x0000002e, 0x000006b1, 0x6516a3ec, 0x19321f9c, 857 0x17a52ae2}, 858 {0x3287a80a, 0x00000026, 0x00000496, 0x0b257eb1, 0x754ebd51, 859 0x886d935a}, 860 {0xa4db423e, 0x00000023, 0x0000045d, 0x9b3a66dc, 0x873e9f11, 861 0xeaaeaeb2}, 862 {0x7a1078df, 0x00000015, 0x0000014a, 0x8c2484c5, 0x6a628659, 863 0x8e900a4b}, 864 {0x6048bd5b, 0x00000006, 0x0000006a, 0x897e3559, 0xac9961af, 865 0xd74662b1}, 866 {0xd8f9ea20, 0x0000003d, 0x00000277, 0x60eb905b, 0xed2aaf99, 867 0xd26752ba}, 868 {0xea5ec3b4, 0x0000002a, 0x000004fe, 0x869965dc, 0x6c1f833b, 869 0x8b1fcd62}, 870 {0x2dfb005d, 0x00000016, 0x00000345, 0x6a3b117e, 0xf05e8521, 871 0xf54342fe}, 872 {0x5a214ade, 0x00000020, 0x000005b6, 0x467f70be, 0xcb22ccd3, 873 0x5b95b988}, 874 {0xf0ab9cca, 0x00000032, 0x00000515, 0xed223df3, 0x7f3ef01d, 875 0x2e1176be}, 876 {0x91b444f9, 0x0000002e, 0x000007f8, 0x84e9a983, 0x5676756f, 877 0x66120546}, 878 {0x1b5d2ddb, 0x0000002e, 0x0000012c, 0xba638c4c, 0x3f42047b, 879 0xf256a5cc}, 880 {0xd824d1bb, 0x0000003a, 0x000007b5, 0x6288653b, 0x3a3ebea0, 881 0x4af1dd69}, 882 {0x0470180c, 0x00000034, 0x000001f0, 0x9d5b80d6, 0x3de08195, 883 0x56f0a04a}, 884 {0xffaa3a3f, 0x00000036, 0x00000299, 0xf3a82ab8, 0x53e0c13d, 885 0x74f6b6b2}, 886 {0x6406cfeb, 0x00000023, 0x00000600, 0xa920b8e8, 0xe4e2acf4, 887 0x085951fd}, 888 {0xb24aaa38, 0x0000003e, 0x000004a1, 0x657cc328, 0x5077b2c3, 889 0xc65387eb}, 890 {0x58b2ab7c, 0x00000039, 0x000002b4, 0x3a17ee7e, 0x9dcb3643, 891 0x1ca9257b}, 892 {0x3db85970, 0x00000006, 0x000002b6, 0x95268b59, 0xb9812c10, 893 0xfd196d76}, 894 {0x857830c5, 0x00000003, 0x00000590, 0x4ef439d5, 0xf042161d, 895 0x5ef88339}, 896 {0xe1fcd978, 0x0000003e, 0x000007d8, 0xae8d8699, 0xce0a1ef5, 897 0x2c3714d9}, 898 {0xb982a768, 0x00000016, 0x000006e0, 0x62fad3df, 0x5f8a067b, 899 0x58576548}, 900 {0x1d581ce8, 0x0000001e, 0x0000058b, 0xf0f5da53, 0x26e39eee, 901 0xfd7c57de}, 902 {0x2456719b, 0x00000025, 0x00000503, 0x4296ac64, 0xd50e4c14, 903 0xd5fedd59}, 904 {0xfae6d8f2, 0x00000000, 0x0000055d, 0x057fdf2e, 0x2a31391a, 905 0x1cc3b17b}, 906 {0xcba828e3, 0x00000039, 0x000002ce, 0xe3f22351, 0x8f00877b, 907 0x270eed73}, 908 {0x13d25952, 0x0000000a, 0x0000072d, 0x76d4b4cc, 0x5eb67ec3, 909 0x91ecbb11}, 910 {0x0342be3f, 0x00000015, 0x00000599, 0xec75d9f1, 0x9d4d2826, 911 0x05ed8d0c}, 912 {0xeaa344e0, 0x00000014, 0x000004d8, 0x72a4c981, 0x2064ea06, 913 0x0b09ad5b}, 914 {0xbbb52021, 0x0000003b, 0x00000272, 0x04af99fc, 0xaf042d35, 915 0xf8d511fb}, 916 {0xb66384dc, 0x0000001d, 0x000007fc, 0xd7629116, 0x782bd801, 917 0x5ad832cc}, 918 {0x616c01b6, 0x00000022, 0x000002c8, 0x5b1dab30, 0x783ce7d2, 919 0x1214d196}, 920 {0xce2bdaad, 0x00000016, 0x0000062a, 0x932535c8, 0x3f02926d, 921 0x5747218a}, 922 {0x00fe84d7, 0x00000005, 0x00000205, 0x850e50aa, 0x753d649c, 923 0xde8f14de}, 924 {0xbebdcb4c, 0x00000006, 0x0000055d, 0xbeaa37a2, 0x2d8c9eba, 925 0x3563b7b9}, 926 {0xd8b1a02a, 0x00000010, 0x00000387, 0x5017d2fc, 0x503541a5, 927 0x071475d0}, 928 {0x3b96cad2, 0x00000036, 0x00000347, 0x1d2372ae, 0x926cd90b, 929 0x54c79d60}, 930 {0xc94c1ed7, 0x00000005, 0x0000038b, 0x9e9fdb22, 0x144a9178, 931 0x4c53eee6}, 932 {0x1aad454e, 0x00000025, 0x000002b2, 0xc3f6315c, 0x5c7a35b3, 933 0x10137a3c}, 934 {0xa4fec9a6, 0x00000000, 0x000006d6, 0x90be5080, 0xa4107605, 935 0xaa9d6c73}, 936 {0x1bbe71e2, 0x0000001f, 0x000002fd, 0x4e504c3b, 0x284ccaf1, 937 0xb63d23e7}, 938 {0x4201c7e4, 0x00000002, 0x000002b7, 0x7822e3f9, 0x0cc912a9, 939 0x7f53e9cf}, 940 {0x23fddc96, 0x00000003, 0x00000627, 0x8a385125, 0x07767e78, 941 0x13c1cd83}, 942 {0xd82ba25c, 0x00000016, 0x0000063e, 0x98e4148a, 0x283330c9, 943 0x49ff5867}, 944 {0x786f2032, 0x0000002d, 0x0000060f, 0xf201600a, 0xf561bfcd, 945 0x8467f211}, 946 {0xfebe4e1f, 0x0000002a, 0x000004f2, 0x95e51961, 0xfd80dcab, 947 0x3f9683b2}, 948 {0x1a6e0a39, 0x00000008, 0x00000672, 0x8af6c2a5, 0x78dd84cb, 949 0x76a3f874}, 950 {0x56000ab8, 0x0000000e, 0x000000e5, 0x36bacb8f, 0x22ee1f77, 951 0x863b702f}, 952 {0x4717fe0c, 0x00000000, 0x000006ec, 0x8439f342, 0x5c8e03da, 953 0xdc6c58ff}, 954 {0xd5d5d68e, 0x0000003c, 0x000003a3, 0x46fff083, 0x177d1b39, 955 0x0622cc95}, 956 {0xc25dd6c6, 0x00000024, 0x000006c0, 0x5ceb8eb4, 0x892b0d16, 957 0xe85605cd}, 958 {0xe9b11300, 0x00000023, 0x00000683, 0x07a5d59a, 0x6c6a3208, 959 0x31da5f06}, 960 {0x95cd285e, 0x00000001, 0x00000047, 0x7b3a4368, 0x0202c07e, 961 0xa1f2e784}, 962 {0xd9245a25, 0x0000001e, 0x000003a6, 0xd33c1841, 0x1936c0d5, 963 0xb07cc616}, 964 {0x103279db, 0x00000006, 0x0000039b, 0xca09b8a0, 0x77d62892, 965 0xbf943b6c}, 966 {0x1cba3172, 0x00000027, 0x000001c8, 0xcb377194, 0xebe682db, 967 0x2c01af1c}, 968 {0x8f613739, 0x0000000c, 0x000001df, 0xb4b0bc87, 0x7710bd43, 969 0x0fe5f56d}, 970 {0x1c6aa90d, 0x0000001b, 0x0000053c, 0x70559245, 0xda7894ac, 971 0xf8943b2d}, 972 {0xaabe5b93, 0x0000003d, 0x00000715, 0xcdbf42fa, 0x0c3b99e7, 973 0xe4d89272}, 974 {0xf15dd038, 0x00000006, 0x000006db, 0x6e104aea, 0x8d5967f2, 975 0x7c2f6bbb}, 976 {0x584dd49c, 0x00000020, 0x000007bc, 0x36b6cfd6, 0xad4e23b2, 977 0xabbf388b}, 978 {0x5d8c9506, 0x00000020, 0x00000470, 0x4c62378e, 0x31d92640, 979 0x1dca1f4e}, 980 {0xb80d17b0, 0x00000032, 0x00000346, 0x22a5bb88, 0x9a7ec89f, 981 0x5c170e23}, 982 {0xdaf0592e, 0x00000023, 0x000007b0, 0x3cab3f99, 0x9b1fdd99, 983 0xc0e9d672}, 984 {0x4793cc85, 0x0000000d, 0x00000706, 0xe82e04f6, 0xed3db6b7, 985 0xc18bdc86}, 986 {0x82ebf64e, 0x00000009, 0x000007c3, 0x69d590a9, 0x9efa8499, 987 0xa874fcdd}, 988 {0xb18a0319, 0x00000026, 0x000007db, 0x1cf98dcc, 0x8fa9ad6a, 989 0x9dc0bb48}, 990 }; 991 992 #include <linux/time.h> 993 994 static int __init crc32c_test(void) 995 { 996 int i; 997 int errors = 0; 998 int bytes = 0; 999 struct timespec start, stop; 1000 u64 nsec; 1001 unsigned long flags; 1002 1003 /* keep static to prevent cache warming code from 1004 * getting eliminated by the compiler */ 1005 static u32 crc; 1006 1007 /* pre-warm the cache */ 1008 for (i = 0; i < 100; i++) { 1009 bytes += 2*test[i].length; 1010 1011 crc ^= __crc32c_le(test[i].crc, test_buf + 1012 test[i].start, test[i].length); 1013 } 1014 1015 /* reduce OS noise */ 1016 local_irq_save(flags); 1017 local_irq_disable(); 1018 1019 getnstimeofday(&start); 1020 for (i = 0; i < 100; i++) { 1021 if (test[i].crc32c_le != __crc32c_le(test[i].crc, test_buf + 1022 test[i].start, test[i].length)) 1023 errors++; 1024 } 1025 getnstimeofday(&stop); 1026 1027 local_irq_restore(flags); 1028 local_irq_enable(); 1029 1030 nsec = stop.tv_nsec - start.tv_nsec + 1031 1000000000 * (stop.tv_sec - start.tv_sec); 1032 1033 pr_info("crc32c: CRC_LE_BITS = %d\n", CRC_LE_BITS); 1034 1035 if (errors) 1036 pr_warn("crc32c: %d self tests failed\n", errors); 1037 else { 1038 pr_info("crc32c: self tests passed, processed %d bytes in %lld nsec\n", 1039 bytes, nsec); 1040 } 1041 1042 return 0; 1043 } 1044 1045 static int __init crc32_test(void) 1046 { 1047 int i; 1048 int errors = 0; 1049 int bytes = 0; 1050 struct timespec start, stop; 1051 u64 nsec; 1052 unsigned long flags; 1053 1054 /* keep static to prevent cache warming code from 1055 * getting eliminated by the compiler */ 1056 static u32 crc; 1057 1058 /* pre-warm the cache */ 1059 for (i = 0; i < 100; i++) { 1060 bytes += 2*test[i].length; 1061 1062 crc ^= crc32_le(test[i].crc, test_buf + 1063 test[i].start, test[i].length); 1064 1065 crc ^= crc32_be(test[i].crc, test_buf + 1066 test[i].start, test[i].length); 1067 } 1068 1069 /* reduce OS noise */ 1070 local_irq_save(flags); 1071 local_irq_disable(); 1072 1073 getnstimeofday(&start); 1074 for (i = 0; i < 100; i++) { 1075 if (test[i].crc_le != crc32_le(test[i].crc, test_buf + 1076 test[i].start, test[i].length)) 1077 errors++; 1078 1079 if (test[i].crc_be != crc32_be(test[i].crc, test_buf + 1080 test[i].start, test[i].length)) 1081 errors++; 1082 } 1083 getnstimeofday(&stop); 1084 1085 local_irq_restore(flags); 1086 local_irq_enable(); 1087 1088 nsec = stop.tv_nsec - start.tv_nsec + 1089 1000000000 * (stop.tv_sec - start.tv_sec); 1090 1091 pr_info("crc32: CRC_LE_BITS = %d, CRC_BE BITS = %d\n", 1092 CRC_LE_BITS, CRC_BE_BITS); 1093 1094 if (errors) 1095 pr_warn("crc32: %d self tests failed\n", errors); 1096 else { 1097 pr_info("crc32: self tests passed, processed %d bytes in %lld nsec\n", 1098 bytes, nsec); 1099 } 1100 1101 return 0; 1102 } 1103 1104 static int __init crc32test_init(void) 1105 { 1106 crc32_test(); 1107 crc32c_test(); 1108 return 0; 1109 } 1110 1111 static void __exit crc32_exit(void) 1112 { 1113 } 1114 1115 module_init(crc32test_init); 1116 module_exit(crc32_exit); 1117 #endif /* CONFIG_CRC32_SELFTEST */ 1118