1*7e6ee7adSKyungmin Park /* 2*7e6ee7adSKyungmin Park * crc32.h 3*7e6ee7adSKyungmin Park * See linux/lib/crc32.c for license and changes 4*7e6ee7adSKyungmin Park */ 5*7e6ee7adSKyungmin Park #ifndef _LINUX_CRC32_H 6*7e6ee7adSKyungmin Park #define _LINUX_CRC32_H 7*7e6ee7adSKyungmin Park 8*7e6ee7adSKyungmin Park #include <linux/types.h> 9*7e6ee7adSKyungmin Park //#include <linux/bitrev.h> 10*7e6ee7adSKyungmin Park 11*7e6ee7adSKyungmin Park extern u32 crc32_le(u32 crc, unsigned char const *p, size_t len); 12*7e6ee7adSKyungmin Park //extern u32 crc32_be(u32 crc, unsigned char const *p, size_t len); 13*7e6ee7adSKyungmin Park 14*7e6ee7adSKyungmin Park #define crc32(seed, data, length) crc32_le(seed, (unsigned char const *)data, length) 15*7e6ee7adSKyungmin Park 16*7e6ee7adSKyungmin Park /* 17*7e6ee7adSKyungmin Park * Helpers for hash table generation of ethernet nics: 18*7e6ee7adSKyungmin Park * 19*7e6ee7adSKyungmin Park * Ethernet sends the least significant bit of a byte first, thus crc32_le 20*7e6ee7adSKyungmin Park * is used. The output of crc32_le is bit reversed [most significant bit 21*7e6ee7adSKyungmin Park * is in bit nr 0], thus it must be reversed before use. Except for 22*7e6ee7adSKyungmin Park * nics that bit swap the result internally... 23*7e6ee7adSKyungmin Park */ 24*7e6ee7adSKyungmin Park //#define ether_crc(length, data) bitrev32(crc32_le(~0, data, length)) 25*7e6ee7adSKyungmin Park //#define ether_crc_le(length, data) crc32_le(~0, data, length) 26*7e6ee7adSKyungmin Park 27*7e6ee7adSKyungmin Park #endif /* _LINUX_CRC32_H */ 28