diff options
Diffstat (limited to 'arch/ia64/lib')
| -rw-r--r-- | arch/ia64/lib/checksum.c | 38 | ||||
| -rw-r--r-- | arch/ia64/lib/csum_partial_copy.c | 31 | ||||
| -rw-r--r-- | arch/ia64/lib/ip_fast_csum.S | 58 |
3 files changed, 82 insertions, 45 deletions
diff --git a/arch/ia64/lib/checksum.c b/arch/ia64/lib/checksum.c index beb11721d9f..4411d9baeb2 100644 --- a/arch/ia64/lib/checksum.c +++ b/arch/ia64/lib/checksum.c @@ -33,32 +33,32 @@ from64to16 (unsigned long x) * computes the checksum of the TCP/UDP pseudo-header * returns a 16-bit checksum, already complemented. */ -unsigned short int -csum_tcpudp_magic (unsigned long saddr, unsigned long daddr, unsigned short len, - unsigned short proto, unsigned int sum) +__sum16 +csum_tcpudp_magic (__be32 saddr, __be32 daddr, unsigned short len, + unsigned short proto, __wsum sum) { - return ~from64to16(saddr + daddr + sum + ((unsigned long) ntohs(len) << 16) + - ((unsigned long) proto << 8)); + return (__force __sum16)~from64to16( + (__force u64)saddr + (__force u64)daddr + + (__force u64)sum + ((len + proto) << 8)); } EXPORT_SYMBOL(csum_tcpudp_magic); -unsigned int -csum_tcpudp_nofold (unsigned long saddr, unsigned long daddr, unsigned short len, - unsigned short proto, unsigned int sum) +__wsum +csum_tcpudp_nofold (__be32 saddr, __be32 daddr, unsigned short len, + unsigned short proto, __wsum sum) { unsigned long result; - result = (saddr + daddr + sum + - ((unsigned long) ntohs(len) << 16) + - ((unsigned long) proto << 8)); + result = (__force u64)saddr + (__force u64)daddr + + (__force u64)sum + ((len + proto) << 8); /* Fold down to 32-bits so we don't lose in the typedef-less network stack. */ /* 64 to 33 */ result = (result & 0xffffffff) + (result >> 32); /* 33 to 32 */ result = (result & 0xffffffff) + (result >> 32); - return result; + return (__force __wsum)result; } extern unsigned long do_csum (const unsigned char *, long); @@ -75,16 +75,15 @@ extern unsigned long do_csum (const unsigned char *, long); * * 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) { - unsigned long result = do_csum(buff, len); + u64 result = do_csum(buff, len); /* add in old sum, and carry.. */ - result += sum; + result += (__force u32)sum; /* 32+c bits -> 32 bits */ result = (result & 0xffffffff) + (result >> 32); - return result; + return (__force __wsum)result; } EXPORT_SYMBOL(csum_partial); @@ -93,10 +92,9 @@ EXPORT_SYMBOL(csum_partial); * this routine is used for miscellaneous IP-like checksums, mainly * in icmp.c */ -unsigned short -ip_compute_csum (unsigned char * buff, int len) +__sum16 ip_compute_csum (const void *buff, int len) { - return ~do_csum(buff,len); + return (__force __sum16)~do_csum(buff,len); } EXPORT_SYMBOL(ip_compute_csum); diff --git a/arch/ia64/lib/csum_partial_copy.c b/arch/ia64/lib/csum_partial_copy.c index 36866e8a5d2..503dfe6d145 100644 --- a/arch/ia64/lib/csum_partial_copy.c +++ b/arch/ia64/lib/csum_partial_copy.c @@ -104,9 +104,9 @@ out: */ extern unsigned long do_csum(const unsigned char *, long); -static unsigned int -do_csum_partial_copy_from_user (const unsigned char __user *src, unsigned char *dst, - int len, unsigned int psum, int *errp) +__wsum +csum_partial_copy_from_user(const void __user *src, void *dst, + int len, __wsum psum, int *errp) { unsigned long result; @@ -122,30 +122,17 @@ do_csum_partial_copy_from_user (const unsigned char __user *src, unsigned char * result = do_csum(dst, len); /* add in old sum, and carry.. */ - result += psum; + result += (__force u32)psum; /* 32+c bits -> 32 bits */ result = (result & 0xffffffff) + (result >> 32); - return result; -} - -unsigned int -csum_partial_copy_from_user (const unsigned char __user *src, unsigned char *dst, - int len, unsigned int sum, int *errp) -{ - if (!access_ok(VERIFY_READ, src, len)) { - *errp = -EFAULT; - memset(dst, 0, len); - return sum; - } - - return do_csum_partial_copy_from_user(src, dst, len, sum, errp); + return (__force __wsum)result; } -unsigned int -csum_partial_copy_nocheck(const unsigned char __user *src, unsigned char *dst, - int len, unsigned int sum) +__wsum +csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum) { - return do_csum_partial_copy_from_user(src, dst, len, sum, NULL); + return csum_partial_copy_from_user((__force const void __user *)src, + dst, len, sum, NULL); } EXPORT_SYMBOL(csum_partial_copy_nocheck); diff --git a/arch/ia64/lib/ip_fast_csum.S b/arch/ia64/lib/ip_fast_csum.S index 19674ca2acf..1f86aeb2c94 100644 --- a/arch/ia64/lib/ip_fast_csum.S +++ b/arch/ia64/lib/ip_fast_csum.S @@ -8,8 +8,8 @@ * in0: address of buffer to checksum (char *) * in1: length of the buffer (int) * - * Copyright (C) 2002 Intel Corp. - * Copyright (C) 2002 Ken Chen <kenneth.w.chen@intel.com> + * Copyright (C) 2002, 2006 Intel Corp. + * Copyright (C) 2002, 2006 Ken Chen <kenneth.w.chen@intel.com> */ #include <asm/asmmacro.h> @@ -25,6 +25,9 @@ #define in0 r32 #define in1 r33 +#define in2 r34 +#define in3 r35 +#define in4 r36 #define ret0 r8 GLOBAL_ENTRY(ip_fast_csum) @@ -65,8 +68,9 @@ GLOBAL_ENTRY(ip_fast_csum) zxt2 r20=r20 ;; add r20=ret0,r20 + mov r9=0xffff ;; - andcm ret0=-1,r20 + andcm ret0=r9,r20 .restore sp // reset frame state br.ret.sptk.many b0 ;; @@ -88,3 +92,51 @@ GLOBAL_ENTRY(ip_fast_csum) mov b0=r34 br.ret.sptk.many b0 END(ip_fast_csum) + +GLOBAL_ENTRY(csum_ipv6_magic) + ld4 r20=[in0],4 + ld4 r21=[in1],4 + dep r15=in3,in2,32,16 + ;; + ld4 r22=[in0],4 + ld4 r23=[in1],4 + mux1 r15=r15,@rev + ;; + ld4 r24=[in0],4 + ld4 r25=[in1],4 + shr.u r15=r15,16 + add r16=r20,r21 + add r17=r22,r23 + ;; + ld4 r26=[in0],4 + ld4 r27=[in1],4 + add r18=r24,r25 + add r8=r16,r17 + ;; + add r19=r26,r27 + add r8=r8,r18 + ;; + add r8=r8,r19 + add r15=r15,in4 + ;; + add r8=r8,r15 + ;; + shr.u r10=r8,32 // now fold sum into short + zxt4 r11=r8 + ;; + add r8=r10,r11 + ;; + shr.u r10=r8,16 // yeah, keep it rolling + zxt2 r11=r8 + ;; + add r8=r10,r11 + ;; + shr.u r10=r8,16 // three times lucky + zxt2 r11=r8 + ;; + add r8=r10,r11 + mov r9=0xffff + ;; + andcm r8=r9,r8 + br.ret.sptk.many b0 +END(csum_ipv6_magic) |