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authorAl Viro <viro@zeniv.linux.org.uk>2006-11-14 21:20:28 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2006-12-02 21:23:15 -0800
commiteb5a9658656c3d633cc973ec90ccfd6c439dabb6 (patch)
treee3b69b0750410b9389db369aa23f9eddecf96e37 /include/asm-arm/checksum.h
parenta4f89fb7c072b8592b296c2ba216269c0c96db43 (diff)
[NET]: ARM checksum annotations and cleanups.
* sanitize prototypes, annotate * kill csum_partial_copy * usual ntohs->shift, this time in assembler part Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/asm-arm/checksum.h')
-rw-r--r--include/asm-arm/checksum.h83
1 files changed, 41 insertions, 42 deletions
diff --git a/include/asm-arm/checksum.h b/include/asm-arm/checksum.h
index 747bdd31a74b..8c0bb5bb14ee 100644
--- a/include/asm-arm/checksum.h
+++ b/include/asm-arm/checksum.h
@@ -23,7 +23,7 @@
*
* it's best to have buff aligned on a 32-bit boundary
*/
-unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum);
+__wsum csum_partial(const void *buff, int len, __wsum sum);
/*
* the same as csum_partial, but copies from src while it
@@ -33,26 +33,18 @@ unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum)
* better 64-bit) boundary
*/
-unsigned int
-csum_partial_copy_nocheck(const char *src, char *dst, int len, int sum);
+__wsum
+csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum);
-unsigned int
-csum_partial_copy_from_user(const char __user *src, char *dst, int len, int sum, int *err_ptr);
-
-/*
- * This is the old (and unsafe) way of doing checksums, a warning message will
- * be printed if it is used and an exception occurs.
- *
- * this functions should go away after some time.
- */
-#define csum_partial_copy(src,dst,len,sum) csum_partial_copy_nocheck(src,dst,len,sum)
+__wsum
+csum_partial_copy_from_user(const void __user *src, void *dst, int len, __wsum sum, int *err_ptr);
/*
* This is a version of ip_compute_csum() optimized for IP headers,
* which always checksum on 4 octet boundaries.
*/
-static inline unsigned short
-ip_fast_csum(unsigned char * iph, unsigned int ihl)
+static inline __sum16
+ip_fast_csum(const void *iph, unsigned int ihl)
{
unsigned int sum, tmp1;
@@ -78,14 +70,13 @@ ip_fast_csum(unsigned char * iph, unsigned int ihl)
: "=r" (sum), "=r" (iph), "=r" (ihl), "=r" (tmp1)
: "1" (iph), "2" (ihl)
: "cc", "memory");
- return sum;
+ return (__force __sum16)sum;
}
/*
* Fold a partial checksum without adding pseudo headers
*/
-static inline unsigned int
-csum_fold(unsigned int sum)
+static inline __sum16 csum_fold(__wsum sum)
{
__asm__(
"adds %0, %1, %1, lsl #16 @ csum_fold \n\
@@ -93,21 +84,25 @@ csum_fold(unsigned int sum)
: "=r" (sum)
: "r" (sum)
: "cc");
- return (~sum) >> 16;
+ return (__force __sum16)(~(__force u32)sum >> 16);
}
-static inline unsigned int
-csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr, unsigned short len,
- unsigned int proto, unsigned int sum)
+static inline __wsum
+csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
+ unsigned short proto, __wsum sum)
{
__asm__(
"adds %0, %1, %2 @ csum_tcpudp_nofold \n\
- adcs %0, %0, %3 \n\
- adcs %0, %0, %4 \n\
- adcs %0, %0, %5 \n\
+ adcs %0, %0, %3 \n"
+#ifdef __ARMEB__
+ "adcs %0, %0, %4 \n"
+#else
+ "adcs %0, %0, %4, lsl #8 \n"
+#endif
+ "adcs %0, %0, %5 \n\
adc %0, %0, #0"
: "=&r"(sum)
- : "r" (sum), "r" (daddr), "r" (saddr), "r" (ntohs(len)), "Ir" (ntohs(proto))
+ : "r" (sum), "r" (daddr), "r" (saddr), "r" (len), "Ir" (htons(proto))
: "cc");
return sum;
}
@@ -115,23 +110,27 @@ csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr, unsigned short len,
* computes the checksum of the TCP/UDP pseudo-header
* returns a 16-bit checksum, already complemented
*/
-static inline unsigned short int
-csum_tcpudp_magic(unsigned long saddr, unsigned long daddr, unsigned short len,
- unsigned int proto, unsigned int sum)
+static inline __sum16
+csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len,
+ unsigned short proto, __wsum sum)
{
__asm__(
"adds %0, %1, %2 @ csum_tcpudp_magic \n\
- adcs %0, %0, %3 \n\
- adcs %0, %0, %4 \n\
- adcs %0, %0, %5 \n\
+ adcs %0, %0, %3 \n"
+#ifdef __ARMEB__
+ "adcs %0, %0, %4 \n"
+#else
+ "adcs %0, %0, %4, lsl #8 \n"
+#endif
+ "adcs %0, %0, %5 \n\
adc %0, %0, #0 \n\
adds %0, %0, %0, lsl #16 \n\
addcs %0, %0, #0x10000 \n\
mvn %0, %0"
: "=&r"(sum)
- : "r" (sum), "r" (daddr), "r" (saddr), "r" (ntohs(len)), "Ir" (ntohs(proto))
+ : "r" (sum), "r" (daddr), "r" (saddr), "r" (len), "Ir" (htons(proto))
: "cc");
- return sum >> 16;
+ return (__force __sum16)((__force u32)sum >> 16);
}
@@ -139,20 +138,20 @@ csum_tcpudp_magic(unsigned long saddr, unsigned long daddr, unsigned short len,
* this routine is used for miscellaneous IP-like checksums, mainly
* in icmp.c
*/
-static inline unsigned short
-ip_compute_csum(unsigned char * buff, int len)
+static inline __sum16
+ip_compute_csum(const void *buff, int len)
{
return csum_fold(csum_partial(buff, len, 0));
}
#define _HAVE_ARCH_IPV6_CSUM
-extern unsigned long
-__csum_ipv6_magic(struct in6_addr *saddr, struct in6_addr *daddr, __u32 len,
- __u32 proto, unsigned int sum);
+extern __wsum
+__csum_ipv6_magic(const struct in6_addr *saddr, const struct in6_addr *daddr, __be32 len,
+ __be32 proto, __wsum sum);
-static inline unsigned short int
-csum_ipv6_magic(struct in6_addr *saddr, struct in6_addr *daddr, __u32 len,
- unsigned short proto, unsigned int sum)
+static inline __sum16
+csum_ipv6_magic(const struct in6_addr *saddr, const struct in6_addr *daddr, __u32 len,
+ unsigned short proto, __wsum sum)
{
return csum_fold(__csum_ipv6_magic(saddr, daddr, htonl(len),
htonl(proto), sum));