8fd92a66c6
Signed-off-by: Olivier Matz <olivier.matz@6wind.com> Acked-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com> Acked-by: Bruce Richardson <bruce.richardson@intel.com> Acked-by: Thomas Monjalon <thomas@monjalon.net>
163 lines
4.4 KiB
C
163 lines
4.4 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright 2015 6WIND S.A.
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* Copyright 2015 Mellanox.
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*/
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#ifndef RTE_PMD_MLX5_UTILS_H_
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#define RTE_PMD_MLX5_UTILS_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <limits.h>
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#include <assert.h>
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#include <errno.h>
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#include "mlx5_defs.h"
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/* Bit-field manipulation. */
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#define BITFIELD_DECLARE(bf, type, size) \
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type bf[(((size_t)(size) / (sizeof(type) * CHAR_BIT)) + \
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!!((size_t)(size) % (sizeof(type) * CHAR_BIT)))]
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#define BITFIELD_DEFINE(bf, type, size) \
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BITFIELD_DECLARE((bf), type, (size)) = { 0 }
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#define BITFIELD_SET(bf, b) \
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(assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
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(void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] |= \
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((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
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#define BITFIELD_RESET(bf, b) \
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(assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
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(void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] &= \
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~((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
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#define BITFIELD_ISSET(bf, b) \
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(assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
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!!(((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] & \
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((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT))))))
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/* Convert a bit number to the corresponding 64-bit mask */
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#define MLX5_BITSHIFT(v) (UINT64_C(1) << (v))
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/* Save and restore errno around argument evaluation. */
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#define ERRNO_SAFE(x) ((errno = (int []){ errno, ((x), 0) }[0]))
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/*
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* Helper macros to work around __VA_ARGS__ limitations in a C99 compliant
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* manner.
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*/
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#define PMD_DRV_LOG_STRIP(a, b) a
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#define PMD_DRV_LOG_OPAREN (
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#define PMD_DRV_LOG_CPAREN )
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#define PMD_DRV_LOG_COMMA ,
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/* Return the file name part of a path. */
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static inline const char *
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pmd_drv_log_basename(const char *s)
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{
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const char *n = s;
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while (*n)
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if (*(n++) == '/')
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s = n;
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return s;
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}
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/*
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* When debugging is enabled (NDEBUG not defined), file, line and function
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* information replace the driver name (MLX5_DRIVER_NAME) in log messages.
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*/
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#ifndef NDEBUG
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#define PMD_DRV_LOG___(level, ...) \
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ERRNO_SAFE(RTE_LOG(level, PMD, __VA_ARGS__))
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#define PMD_DRV_LOG__(level, ...) \
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PMD_DRV_LOG___(level, "%s:%u: %s(): " __VA_ARGS__)
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#define PMD_DRV_LOG_(level, s, ...) \
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PMD_DRV_LOG__(level, \
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s "\n" PMD_DRV_LOG_COMMA \
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pmd_drv_log_basename(__FILE__) PMD_DRV_LOG_COMMA \
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__LINE__ PMD_DRV_LOG_COMMA \
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__func__, \
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__VA_ARGS__)
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#else /* NDEBUG */
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#define PMD_DRV_LOG___(level, ...) \
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ERRNO_SAFE(RTE_LOG(level, PMD, MLX5_DRIVER_NAME ": " __VA_ARGS__))
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#define PMD_DRV_LOG__(level, ...) \
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PMD_DRV_LOG___(level, __VA_ARGS__)
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#define PMD_DRV_LOG_(level, s, ...) \
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PMD_DRV_LOG__(level, s "\n", __VA_ARGS__)
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#endif /* NDEBUG */
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/* Generic printf()-like logging macro with automatic line feed. */
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#define PMD_DRV_LOG(level, ...) \
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PMD_DRV_LOG_(level, \
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__VA_ARGS__ PMD_DRV_LOG_STRIP PMD_DRV_LOG_OPAREN, \
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PMD_DRV_LOG_CPAREN)
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/*
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* Like assert(), DEBUG() becomes a no-op and claim_zero() does not perform
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* any check when debugging is disabled.
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*/
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#ifndef NDEBUG
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#define DEBUG(...) PMD_DRV_LOG(DEBUG, __VA_ARGS__)
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#define claim_zero(...) assert((__VA_ARGS__) == 0)
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#define claim_nonzero(...) assert((__VA_ARGS__) != 0)
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#else /* NDEBUG */
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#define DEBUG(...) (void)0
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#define claim_zero(...) (__VA_ARGS__)
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#define claim_nonzero(...) (__VA_ARGS__)
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#endif /* NDEBUG */
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#define INFO(...) PMD_DRV_LOG(INFO, __VA_ARGS__)
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#define WARN(...) PMD_DRV_LOG(WARNING, __VA_ARGS__)
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#define ERROR(...) PMD_DRV_LOG(ERR, __VA_ARGS__)
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/* Convenience macros for accessing mbuf fields. */
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#define NEXT(m) ((m)->next)
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#define DATA_LEN(m) ((m)->data_len)
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#define PKT_LEN(m) ((m)->pkt_len)
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#define DATA_OFF(m) ((m)->data_off)
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#define SET_DATA_OFF(m, o) ((m)->data_off = (o))
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#define NB_SEGS(m) ((m)->nb_segs)
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#define PORT(m) ((m)->port)
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/* Transpose flags. Useful to convert IBV to DPDK flags. */
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#define TRANSPOSE(val, from, to) \
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(((from) >= (to)) ? \
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(((val) & (from)) / ((from) / (to))) : \
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(((val) & (from)) * ((to) / (from))))
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/* Allocate a buffer on the stack and fill it with a printf format string. */
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#define MKSTR(name, ...) \
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char name[snprintf(NULL, 0, __VA_ARGS__) + 1]; \
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\
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snprintf(name, sizeof(name), __VA_ARGS__)
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/**
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* Return nearest power of two above input value.
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*
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* @param v
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* Input value.
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*
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* @return
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* Nearest power of two above input value.
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*/
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static inline unsigned int
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log2above(unsigned int v)
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{
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unsigned int l;
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unsigned int r;
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for (l = 0, r = 0; (v >> 1); ++l, v >>= 1)
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r |= (v & 1);
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return l + r;
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}
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#endif /* RTE_PMD_MLX5_UTILS_H_ */
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