/*- * BSD LICENSE * * Copyright 2015 6WIND S.A. * Copyright 2015 Mellanox. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name of 6WIND S.A. nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef RTE_PMD_MLX5_UTILS_H_ #define RTE_PMD_MLX5_UTILS_H_ #include #include #include #include #include #include #include "mlx5_defs.h" /* * Compilation workaround for PPC64 when AltiVec is fully enabled, e.g. std=c11. * Otherwise there would be a type conflict between stdbool and altivec. */ #if defined(__PPC64__) && !defined(__APPLE_ALTIVEC__) #undef bool /* redefine as in stdbool.h */ #define bool _Bool #endif /* Bit-field manipulation. */ #define BITFIELD_DECLARE(bf, type, size) \ type bf[(((size_t)(size) / (sizeof(type) * CHAR_BIT)) + \ !!((size_t)(size) % (sizeof(type) * CHAR_BIT)))] #define BITFIELD_DEFINE(bf, type, size) \ BITFIELD_DECLARE((bf), type, (size)) = { 0 } #define BITFIELD_SET(bf, b) \ (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \ (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] |= \ ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT))))) #define BITFIELD_RESET(bf, b) \ (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \ (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] &= \ ~((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT))))) #define BITFIELD_ISSET(bf, b) \ (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \ !!(((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] & \ ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))) /* Convert a bit number to the corresponding 64-bit mask */ #define MLX5_BITSHIFT(v) (UINT64_C(1) << (v)) /* Save and restore errno around argument evaluation. */ #define ERRNO_SAFE(x) ((errno = (int []){ errno, ((x), 0) }[0])) /* * Helper macros to work around __VA_ARGS__ limitations in a C99 compliant * manner. */ #define PMD_DRV_LOG_STRIP(a, b) a #define PMD_DRV_LOG_OPAREN ( #define PMD_DRV_LOG_CPAREN ) #define PMD_DRV_LOG_COMMA , /* Return the file name part of a path. */ static inline const char * pmd_drv_log_basename(const char *s) { const char *n = s; while (*n) if (*(n++) == '/') s = n; return s; } /* * When debugging is enabled (NDEBUG not defined), file, line and function * information replace the driver name (MLX5_DRIVER_NAME) in log messages. */ #ifndef NDEBUG #define PMD_DRV_LOG___(level, ...) \ ERRNO_SAFE(RTE_LOG(level, PMD, __VA_ARGS__)) #define PMD_DRV_LOG__(level, ...) \ PMD_DRV_LOG___(level, "%s:%u: %s(): " __VA_ARGS__) #define PMD_DRV_LOG_(level, s, ...) \ PMD_DRV_LOG__(level, \ s "\n" PMD_DRV_LOG_COMMA \ pmd_drv_log_basename(__FILE__) PMD_DRV_LOG_COMMA \ __LINE__ PMD_DRV_LOG_COMMA \ __func__, \ __VA_ARGS__) #else /* NDEBUG */ #define PMD_DRV_LOG___(level, ...) \ ERRNO_SAFE(RTE_LOG(level, PMD, MLX5_DRIVER_NAME ": " __VA_ARGS__)) #define PMD_DRV_LOG__(level, ...) \ PMD_DRV_LOG___(level, __VA_ARGS__) #define PMD_DRV_LOG_(level, s, ...) \ PMD_DRV_LOG__(level, s "\n", __VA_ARGS__) #endif /* NDEBUG */ /* Generic printf()-like logging macro with automatic line feed. */ #define PMD_DRV_LOG(level, ...) \ PMD_DRV_LOG_(level, \ __VA_ARGS__ PMD_DRV_LOG_STRIP PMD_DRV_LOG_OPAREN, \ PMD_DRV_LOG_CPAREN) /* * Like assert(), DEBUG() becomes a no-op and claim_zero() does not perform * any check when debugging is disabled. */ #ifndef NDEBUG #define DEBUG(...) PMD_DRV_LOG(DEBUG, __VA_ARGS__) #define claim_zero(...) assert((__VA_ARGS__) == 0) #else /* NDEBUG */ #define DEBUG(...) (void)0 #define claim_zero(...) (__VA_ARGS__) #endif /* NDEBUG */ #define INFO(...) PMD_DRV_LOG(INFO, __VA_ARGS__) #define WARN(...) PMD_DRV_LOG(WARNING, __VA_ARGS__) #define ERROR(...) PMD_DRV_LOG(ERR, __VA_ARGS__) /* Convenience macros for accessing mbuf fields. */ #define NEXT(m) ((m)->next) #define DATA_LEN(m) ((m)->data_len) #define PKT_LEN(m) ((m)->pkt_len) #define DATA_OFF(m) ((m)->data_off) #define SET_DATA_OFF(m, o) ((m)->data_off = (o)) #define NB_SEGS(m) ((m)->nb_segs) #define PORT(m) ((m)->port) /* Transpose flags. Useful to convert IBV to DPDK flags. */ #define TRANSPOSE(val, from, to) \ (((from) >= (to)) ? \ (((val) & (from)) / ((from) / (to))) : \ (((val) & (from)) * ((to) / (from)))) /* Allocate a buffer on the stack and fill it with a printf format string. */ #define MKSTR(name, ...) \ char name[snprintf(NULL, 0, __VA_ARGS__) + 1]; \ \ snprintf(name, sizeof(name), __VA_ARGS__) /** * Return nearest power of two above input value. * * @param v * Input value. * * @return * Nearest power of two above input value. */ static inline unsigned int log2above(unsigned int v) { unsigned int l; unsigned int r; for (l = 0, r = 0; (v >> 1); ++l, v >>= 1) r |= (v & 1); return l + r; } #endif /* RTE_PMD_MLX5_UTILS_H_ */