generic.h has changed in Linux and new addtionals functions were added.
This commit takes the latest and greatest from Linux (v4.17-rc5) to aid with porting drivers that utilize these functions.
Signed-off-by: Ramon Fried ramon.fried@gmail.com --- v2: included specific Linux version in the commit message.
include/linux/byteorder/generic.h | 107 +++++++++++++++++++----------- 1 file changed, 67 insertions(+), 40 deletions(-)
diff --git a/include/linux/byteorder/generic.h b/include/linux/byteorder/generic.h index cff850f850..8fae186d1a 100644 --- a/include/linux/byteorder/generic.h +++ b/include/linux/byteorder/generic.h @@ -1,10 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_BYTEORDER_GENERIC_H #define _LINUX_BYTEORDER_GENERIC_H
/* - * linux/byteorder_generic.h + * linux/byteorder/generic.h * Generic Byte-reordering support * + * The "... p" macros, like le64_to_cpup, can be used with pointers + * to unaligned data, but there will be a performance penalty on + * some architectures. Use get_unaligned for unaligned data. + * * Francois-Rene Rideau fare@tunes.org 19970707 * gathered all the good ideas from all asm-foo/byteorder.h into one file, * cleaned them up. @@ -78,12 +83,6 @@ * */
- -#if defined(__KERNEL__) -/* - * inside the kernel, we can use nicknames; - * outside of it, we must avoid POSIX namespace pollution... - */ #define cpu_to_le64 __cpu_to_le64 #define le64_to_cpu __le64_to_cpu #define cpu_to_le32 __cpu_to_le32 @@ -120,18 +119,8 @@ #define be32_to_cpus __be32_to_cpus #define cpu_to_be16s __cpu_to_be16s #define be16_to_cpus __be16_to_cpus -#endif -
/* - * Handle ntohl and suches. These have various compatibility - * issues - like we want to give the prototype even though we - * also have a macro for them in case some strange program - * wants to take the address of the thing or something.. - * - * Note that these used to return a "long" in libc5, even though - * long is often 64-bit these days.. Thus the casts. - * * They have to be macros in order to do the constant folding * correctly - if the argument passed into a inline function * it is no longer constant according to gcc.. @@ -142,39 +131,77 @@ #undef htonl #undef htons
-/* - * Do the prototypes. Somebody might want to take the - * address or some such sick thing.. - */ -#if defined(__KERNEL__) || (defined (__GLIBC__) && __GLIBC__ >= 2) -extern __u32 ntohl(__u32); -extern __u32 htonl(__u32); -#else -extern unsigned long int ntohl(unsigned long int); -extern unsigned long int htonl(unsigned long int); -#endif -extern unsigned short int ntohs(unsigned short int); -extern unsigned short int htons(unsigned short int); - - -#if defined(__GNUC__) && (__GNUC__ >= 2) - #define ___htonl(x) __cpu_to_be32(x) #define ___htons(x) __cpu_to_be16(x) #define ___ntohl(x) __be32_to_cpu(x) #define ___ntohs(x) __be16_to_cpu(x)
-#if defined(__KERNEL__) || (defined (__GLIBC__) && __GLIBC__ >= 2) #define htonl(x) ___htonl(x) #define ntohl(x) ___ntohl(x) -#else -#define htonl(x) ((unsigned long)___htonl(x)) -#define ntohl(x) ((unsigned long)___ntohl(x)) -#endif #define htons(x) ___htons(x) #define ntohs(x) ___ntohs(x)
-#endif /* OPTIMIZE */ +static inline void le16_add_cpu(__le16 *var, u16 val) +{ + *var = cpu_to_le16(le16_to_cpu(*var) + val); +} + +static inline void le32_add_cpu(__le32 *var, u32 val) +{ + *var = cpu_to_le32(le32_to_cpu(*var) + val); +} + +static inline void le64_add_cpu(__le64 *var, u64 val) +{ + *var = cpu_to_le64(le64_to_cpu(*var) + val); +} + +/* XXX: this stuff can be optimized */ +static inline void le32_to_cpu_array(u32 *buf, unsigned int words) +{ + while (words--) { + __le32_to_cpus(buf); + buf++; + } +} + +static inline void cpu_to_le32_array(u32 *buf, unsigned int words) +{ + while (words--) { + __cpu_to_le32s(buf); + buf++; + } +} + +static inline void be16_add_cpu(__be16 *var, u16 val) +{ + *var = cpu_to_be16(be16_to_cpu(*var) + val); +} + +static inline void be32_add_cpu(__be32 *var, u32 val) +{ + *var = cpu_to_be32(be32_to_cpu(*var) + val); +} + +static inline void be64_add_cpu(__be64 *var, u64 val) +{ + *var = cpu_to_be64(be64_to_cpu(*var) + val); +} + +static inline void cpu_to_be32_array(__be32 *dst, const u32 *src, size_t len) +{ + int i; + + for (i = 0; i < len; i++) + dst[i] = cpu_to_be32(src[i]); +} + +static inline void be32_to_cpu_array(u32 *dst, const __be32 *src, size_t len) +{ + int i;
+ for (i = 0; i < len; i++) + dst[i] = be32_to_cpu(src[i]); +}
#endif /* _LINUX_BYTEORDER_GENERIC_H */