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/*-
* 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 <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <limits.h>
#include <assert.h>
#include <errno.h>
#include "mlx5_defs.h"
/* 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_ */
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