ceph/src/spdk/dpdk/drivers/net/mlx5/mlx5_utils.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2015 6WIND S.A.
   3  * Copyright 2015 Mellanox Technologies, Ltd
   4  */
   5
   6 #ifndef RTE_PMD_MLX5_UTILS_H_
   7 #define RTE_PMD_MLX5_UTILS_H_
   8
   9 #include <stddef.h>
  10 #include <stdint.h>
  11 #include <stdio.h>
  12 #include <limits.h>
  13 #include <assert.h>
  14 #include <errno.h>
  15
  16 #include "mlx5_defs.h"
  17
  18 /*
  19  * Compilation workaround for PPC64 when AltiVec is fully enabled, e.g. std=c11.
  20  * Otherwise there would be a type conflict between stdbool and altivec.
  21  */
  22 #if defined(__PPC64__) && !defined(__APPLE_ALTIVEC__)
  23 #undef bool
  24 /* redefine as in stdbool.h */
  25 #define bool _Bool
  26 #endif
  27
  28 /* Bit-field manipulation. */
  29 #define BITFIELD_DECLARE(bf, type, size) \
  30         type bf[(((size_t)(size) / (sizeof(type) * CHAR_BIT)) + \
  31                  !!((size_t)(size) % (sizeof(type) * CHAR_BIT)))]
  32 #define BITFIELD_DEFINE(bf, type, size) \
  33         BITFIELD_DECLARE((bf), type, (size)) = { 0 }
  34 #define BITFIELD_SET(bf, b) \
  35         (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
  36          (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] |= \
  37                 ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
  38 #define BITFIELD_RESET(bf, b) \
  39         (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
  40          (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] &= \
  41                 ~((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
  42 #define BITFIELD_ISSET(bf, b) \
  43         (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
  44          !!(((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] & \
  45              ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT))))))
  46
  47 /* Convert a bit number to the corresponding 64-bit mask */
  48 #define MLX5_BITSHIFT(v) (UINT64_C(1) << (v))
  49
  50 /* Save and restore errno around argument evaluation. */
  51 #define ERRNO_SAFE(x) ((errno = (int []){ errno, ((x), 0) }[0]))
  52
  53 /*
  54  * Helper macros to work around __VA_ARGS__ limitations in a C99 compliant
  55  * manner.
  56  */
  57 #define PMD_DRV_LOG_STRIP(a, b) a
  58 #define PMD_DRV_LOG_OPAREN (
  59 #define PMD_DRV_LOG_CPAREN )
  60 #define PMD_DRV_LOG_COMMA ,
  61
  62 /* Return the file name part of a path. */
  63 static inline const char *
  64 pmd_drv_log_basename(const char *s)
  65 {
  66         const char *n = s;
  67
  68         while (*n)
  69                 if (*(n++) == '/')
  70                         s = n;
  71         return s;
  72 }
  73
  74 extern int mlx5_logtype;
  75
  76 #define PMD_DRV_LOG___(level, ...) \
  77         rte_log(RTE_LOG_ ## level, \
  78                 mlx5_logtype, \
  79                 RTE_FMT(MLX5_DRIVER_NAME ": " \
  80                         RTE_FMT_HEAD(__VA_ARGS__,), \
  81                 RTE_FMT_TAIL(__VA_ARGS__,)))
  82
  83 /*
  84  * When debugging is enabled (NDEBUG not defined), file, line and function
  85  * information replace the driver name (MLX5_DRIVER_NAME) in log messages.
  86  */
  87 #ifndef NDEBUG
  88
  89 #define PMD_DRV_LOG__(level, ...) \
  90         PMD_DRV_LOG___(level, "%s:%u: %s(): " __VA_ARGS__)
  91 #define PMD_DRV_LOG_(level, s, ...) \
  92         PMD_DRV_LOG__(level, \
  93                 s "\n" PMD_DRV_LOG_COMMA \
  94                 pmd_drv_log_basename(__FILE__) PMD_DRV_LOG_COMMA \
  95                 __LINE__ PMD_DRV_LOG_COMMA \
  96                 __func__, \
  97                 __VA_ARGS__)
  98
  99 #else /* NDEBUG */
 100 #define PMD_DRV_LOG__(level, ...) \
 101         PMD_DRV_LOG___(level, __VA_ARGS__)
 102 #define PMD_DRV_LOG_(level, s, ...) \
 103         PMD_DRV_LOG__(level, s "\n", __VA_ARGS__)
 104
 105 #endif /* NDEBUG */
 106
 107 /* Generic printf()-like logging macro with automatic line feed. */
 108 #define DRV_LOG(level, ...) \
 109         PMD_DRV_LOG_(level, \
 110                 __VA_ARGS__ PMD_DRV_LOG_STRIP PMD_DRV_LOG_OPAREN, \
 111                 PMD_DRV_LOG_CPAREN)
 112
 113 /* claim_zero() does not perform any check when debugging is disabled. */
 114 #ifndef NDEBUG
 115
 116 #define DEBUG(...) DRV_LOG(DEBUG, __VA_ARGS__)
 117 #define claim_zero(...) assert((__VA_ARGS__) == 0)
 118 #define claim_nonzero(...) assert((__VA_ARGS__) != 0)
 119
 120 #else /* NDEBUG */
 121
 122 #define DEBUG(...) (void)0
 123 #define claim_zero(...) (__VA_ARGS__)
 124 #define claim_nonzero(...) (__VA_ARGS__)
 125
 126 #endif /* NDEBUG */
 127
 128 #define INFO(...) DRV_LOG(INFO, __VA_ARGS__)
 129 #define WARN(...) DRV_LOG(WARNING, __VA_ARGS__)
 130 #define ERROR(...) DRV_LOG(ERR, __VA_ARGS__)
 131
 132 /* Convenience macros for accessing mbuf fields. */
 133 #define NEXT(m) ((m)->next)
 134 #define DATA_LEN(m) ((m)->data_len)
 135 #define PKT_LEN(m) ((m)->pkt_len)
 136 #define DATA_OFF(m) ((m)->data_off)
 137 #define SET_DATA_OFF(m, o) ((m)->data_off = (o))
 138 #define NB_SEGS(m) ((m)->nb_segs)
 139 #define PORT(m) ((m)->port)
 140
 141 /* Transpose flags. Useful to convert IBV to DPDK flags. */
 142 #define TRANSPOSE(val, from, to) \
 143         (((from) >= (to)) ? \
 144          (((val) & (from)) / ((from) / (to))) : \
 145          (((val) & (from)) * ((to) / (from))))
 146
 147 /* Allocate a buffer on the stack and fill it with a printf format string. */
 148 #define MKSTR(name, ...) \
 149         char name[snprintf(NULL, 0, __VA_ARGS__) + 1]; \
 150         \
 151         snprintf(name, sizeof(name), __VA_ARGS__)
 152
 153 /**
 154  * Return nearest power of two above input value.
 155  *
 156  * @param v
 157  *   Input value.
 158  *
 159  * @return
 160  *   Nearest power of two above input value.
 161  */
 162 static inline unsigned int
 163 log2above(unsigned int v)
 164 {
 165         unsigned int l;
 166         unsigned int r;
 167
 168         for (l = 0, r = 0; (v >> 1); ++l, v >>= 1)
 169                 r |= (v & 1);
 170         return l + r;
 171 }
 172
 173 #endif /* RTE_PMD_MLX5_UTILS_H_ */