7f30491ccd
After moving the the include files there were a few clean-ups: 1) Some files used #include <asm-ia64/xyz.h>, changed to <asm/xyz.h> 2) Some comments alerted maintainers to look at various header files to make matching updates if certain code were to be changed. Updated these comments to use the new include paths. 3) Some header files mentioned their own names in initial comments. Just deleted these self references. Signed-off-by: Tony Luck <tony.luck@intel.com>
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
#ifndef _ASM_IA64_CHECKSUM_H
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#define _ASM_IA64_CHECKSUM_H
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/*
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* Modified 1998, 1999
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* David Mosberger-Tang <davidm@hpl.hp.com>, Hewlett-Packard Co
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*/
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/*
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* This is a version of ip_compute_csum() optimized for IP headers,
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* which always checksum on 4 octet boundaries.
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*/
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extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl);
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/*
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* Computes the checksum of the TCP/UDP pseudo-header returns a 16-bit
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* checksum, already complemented
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*/
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extern __sum16 csum_tcpudp_magic (__be32 saddr, __be32 daddr,
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unsigned short len,
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unsigned short proto,
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__wsum sum);
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extern __wsum csum_tcpudp_nofold (__be32 saddr, __be32 daddr,
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unsigned short len,
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unsigned short proto,
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__wsum sum);
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/*
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* Computes the checksum of a memory block at buff, length len,
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* and adds in "sum" (32-bit)
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*
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* returns a 32-bit number suitable for feeding into itself
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* or csum_tcpudp_magic
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*
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* this function must be called with even lengths, except
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* for the last fragment, which may be odd
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*
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* it's best to have buff aligned on a 32-bit boundary
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*/
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extern __wsum csum_partial(const void *buff, int len, __wsum sum);
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/*
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* Same as csum_partial, but copies from src while it checksums.
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*
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* Here it is even more important to align src and dst on a 32-bit (or
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* even better 64-bit) boundary.
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*/
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extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
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int len, __wsum sum,
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int *errp);
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extern __wsum csum_partial_copy_nocheck(const void *src, void *dst,
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int len, __wsum sum);
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/*
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* This routine is used for miscellaneous IP-like checksums, mainly in
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* icmp.c
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*/
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extern __sum16 ip_compute_csum(const void *buff, int len);
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/*
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* Fold a partial checksum without adding pseudo headers.
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*/
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static inline __sum16 csum_fold(__wsum csum)
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{
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u32 sum = (__force u32)csum;
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sum = (sum & 0xffff) + (sum >> 16);
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sum = (sum & 0xffff) + (sum >> 16);
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return (__force __sum16)~sum;
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}
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#define _HAVE_ARCH_IPV6_CSUM 1
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struct in6_addr;
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extern __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
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const struct in6_addr *daddr, __u32 len, unsigned short proto,
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__wsum csum);
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#endif /* _ASM_IA64_CHECKSUM_H */
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