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Diffstat (limited to 'arch/cris/include/asm/checksum.h')
-rw-r--r-- | arch/cris/include/asm/checksum.h | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/arch/cris/include/asm/checksum.h b/arch/cris/include/asm/checksum.h deleted file mode 100644 index 61b6a4f6a002..000000000000 --- a/arch/cris/include/asm/checksum.h +++ /dev/null @@ -1,83 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* TODO: csum_tcpudp_magic could be speeded up, and csum_fold as well */ - -#ifndef _CRIS_CHECKSUM_H -#define _CRIS_CHECKSUM_H - -#include <arch/checksum.h> - -/* - * computes the checksum of a memory block at buff, length len, - * and adds in "sum" (32-bit) - * - * returns a 32-bit number suitable for feeding into itself - * or csum_tcpudp_magic - * - * this function must be called with even lengths, except - * for the last fragment, which may be odd - * - * it's best to have buff aligned on a 32-bit boundary - */ -__wsum csum_partial(const void *buff, int len, __wsum sum); - -/* - * the same as csum_partial, but copies from src while it - * checksums - * - * here even more important to align src and dst on a 32-bit (or even - * better 64-bit) boundary - */ - -__wsum csum_partial_copy_nocheck(const void *src, void *dst, - int len, __wsum sum); - -/* - * Fold a partial checksum into a word - */ - -static inline __sum16 csum_fold(__wsum csum) -{ - u32 sum = (__force u32)csum; - sum = (sum & 0xffff) + (sum >> 16); /* add in end-around carry */ - sum = (sum & 0xffff) + (sum >> 16); /* add in end-around carry */ - return (__force __sum16)~sum; -} - -extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst, - int len, __wsum sum, - int *errptr); - -/* - * This is a version of ip_compute_csum() optimized for IP headers, - * which always checksum on 4 octet boundaries. - * - */ - -static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl) -{ - return csum_fold(csum_partial(iph, ihl * 4, 0)); -} - -/* - * computes the checksum of the TCP/UDP pseudo-header - * returns a 16-bit checksum, already complemented - */ - -static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr, - __u32 len, __u8 proto, - __wsum sum) -{ - return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum)); -} - -/* - * this routine is used for miscellaneous IP-like checksums, mainly - * in icmp.c - */ - -static inline __sum16 ip_compute_csum(const void *buff, int len) -{ - return csum_fold (csum_partial(buff, len, 0)); -} - -#endif |