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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/mn10300/include/asm/checksum.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/mn10300/include/asm/checksum.h')
-rw-r--r-- | kernel/arch/mn10300/include/asm/checksum.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/kernel/arch/mn10300/include/asm/checksum.h b/kernel/arch/mn10300/include/asm/checksum.h new file mode 100644 index 000000000..9fb2a8d88 --- /dev/null +++ b/kernel/arch/mn10300/include/asm/checksum.h @@ -0,0 +1,86 @@ +/* MN10300 Optimised checksumming code + * + * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version + * 2 of the Licence, or (at your option) any later version. + */ +#ifndef _ASM_CHECKSUM_H +#define _ASM_CHECKSUM_H + +extern __wsum csum_partial(const void *buff, int len, __wsum sum); +extern __wsum csum_partial_copy_nocheck(const void *src, void *dst, + int len, __wsum sum); +extern __wsum csum_partial_copy_from_user(const void *src, void *dst, + int len, __wsum sum, + int *err_ptr); +extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl); +extern __wsum csum_partial(const void *buff, int len, __wsum sum); +extern __sum16 ip_compute_csum(const void *buff, int len); + +#define csum_partial_copy_fromuser csum_partial_copy +extern __wsum csum_partial_copy(const void *src, void *dst, int len, + __wsum sum); + +static inline __sum16 csum_fold(__wsum sum) +{ + asm( + " add %1,%0 \n" + " addc 0xffff,%0 \n" + : "=r" (sum) + : "r" (sum << 16), "0" (sum & 0xffff0000) + : "cc" + ); + return (~sum) >> 16; +} + +static inline __wsum csum_tcpudp_nofold(unsigned long saddr, + unsigned long daddr, + unsigned short len, + unsigned short proto, + __wsum sum) +{ + __wsum tmp; + + tmp = (__wsum) ntohs(len) << 16; + tmp += (__wsum) proto << 8; + + asm( + " add %1,%0 \n" + " addc %2,%0 \n" + " addc %3,%0 \n" + " addc 0,%0 \n" + : "=r" (sum) + : "r" (daddr), "r"(saddr), "r"(tmp), "0"(sum) + : "cc" + ); + return sum; +} + +/* + * computes the checksum of the TCP/UDP pseudo-header + * returns a 16-bit checksum, already complemented + */ +static inline __sum16 csum_tcpudp_magic(unsigned long saddr, + unsigned long daddr, + unsigned short len, + unsigned short proto, + __wsum sum) +{ + return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum)); +} + +#undef _HAVE_ARCH_IPV6_CSUM + +/* + * Copy and checksum to user + */ +#define HAVE_CSUM_COPY_USER +extern __wsum csum_and_copy_to_user(const void *src, void *dst, int len, + __wsum sum, int *err_ptr); + + +#endif /* _ASM_CHECKSUM_H */ |