4 * Copyright 2015 6WIND S.A.
5 * Copyright 2015 Mellanox.
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34 #ifndef RTE_PMD_MLX5_UTILS_H_
35 #define RTE_PMD_MLX5_UTILS_H_
43 #include "mlx5_defs.h"
45 /* Bit-field manipulation. */
46 #define BITFIELD_DECLARE(bf, type, size) \
47 type bf[(((size_t)(size) / (sizeof(type) * CHAR_BIT)) + \
48 !!((size_t)(size) % (sizeof(type) * CHAR_BIT)))]
49 #define BITFIELD_DEFINE(bf, type, size) \
50 BITFIELD_DECLARE((bf), type, (size)) = { 0 }
51 #define BITFIELD_SET(bf, b) \
52 (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
53 (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] |= \
54 ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
55 #define BITFIELD_RESET(bf, b) \
56 (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
57 (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] &= \
58 ~((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
59 #define BITFIELD_ISSET(bf, b) \
60 (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
61 !!(((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] & \
62 ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT))))))
64 /* Save and restore errno around argument evaluation. */
65 #define ERRNO_SAFE(x) ((errno = (int []){ errno, ((x), 0) }[0]))
68 * Helper macros to work around __VA_ARGS__ limitations in a C99 compliant
71 #define PMD_DRV_LOG_STRIP(a, b) a
72 #define PMD_DRV_LOG_OPAREN (
73 #define PMD_DRV_LOG_CPAREN )
74 #define PMD_DRV_LOG_COMMA ,
76 /* Return the file name part of a path. */
77 static inline const char *
78 pmd_drv_log_basename(const char *s)
89 * When debugging is enabled (NDEBUG not defined), file, line and function
90 * information replace the driver name (MLX5_DRIVER_NAME) in log messages.
94 #define PMD_DRV_LOG___(level, ...) \
95 ERRNO_SAFE(RTE_LOG(level, PMD, __VA_ARGS__))
96 #define PMD_DRV_LOG__(level, ...) \
97 PMD_DRV_LOG___(level, "%s:%u: %s(): " __VA_ARGS__)
98 #define PMD_DRV_LOG_(level, s, ...) \
99 PMD_DRV_LOG__(level, \
100 s "\n" PMD_DRV_LOG_COMMA \
101 pmd_drv_log_basename(__FILE__) PMD_DRV_LOG_COMMA \
102 __LINE__ PMD_DRV_LOG_COMMA \
108 #define PMD_DRV_LOG___(level, ...) \
109 ERRNO_SAFE(RTE_LOG(level, PMD, MLX5_DRIVER_NAME ": " __VA_ARGS__))
110 #define PMD_DRV_LOG__(level, ...) \
111 PMD_DRV_LOG___(level, __VA_ARGS__)
112 #define PMD_DRV_LOG_(level, s, ...) \
113 PMD_DRV_LOG__(level, s "\n", __VA_ARGS__)
117 /* Generic printf()-like logging macro with automatic line feed. */
118 #define PMD_DRV_LOG(level, ...) \
119 PMD_DRV_LOG_(level, \
120 __VA_ARGS__ PMD_DRV_LOG_STRIP PMD_DRV_LOG_OPAREN, \
124 * Like assert(), DEBUG() becomes a no-op and claim_zero() does not perform
125 * any check when debugging is disabled.
129 #define DEBUG(...) PMD_DRV_LOG(DEBUG, __VA_ARGS__)
130 #define claim_zero(...) assert((__VA_ARGS__) == 0)
134 #define DEBUG(...) (void)0
135 #define claim_zero(...) (__VA_ARGS__)
139 #define INFO(...) PMD_DRV_LOG(INFO, __VA_ARGS__)
140 #define WARN(...) PMD_DRV_LOG(WARNING, __VA_ARGS__)
141 #define ERROR(...) PMD_DRV_LOG(ERR, __VA_ARGS__)
143 /* Convenience macros for accessing mbuf fields. */
144 #define NEXT(m) ((m)->next)
145 #define DATA_LEN(m) ((m)->data_len)
146 #define PKT_LEN(m) ((m)->pkt_len)
147 #define DATA_OFF(m) ((m)->data_off)
148 #define SET_DATA_OFF(m, o) ((m)->data_off = (o))
149 #define NB_SEGS(m) ((m)->nb_segs)
150 #define PORT(m) ((m)->port)
152 /* Transpose flags. Useful to convert IBV to DPDK flags. */
153 #define TRANSPOSE(val, from, to) \
154 (((from) >= (to)) ? \
155 (((val) & (from)) / ((from) / (to))) : \
156 (((val) & (from)) * ((to) / (from))))
158 /* Allocate a buffer on the stack and fill it with a printf format string. */
159 #define MKSTR(name, ...) \
160 char name[snprintf(NULL, 0, __VA_ARGS__) + 1]; \
162 snprintf(name, sizeof(name), __VA_ARGS__)
165 * Return nearest power of two above input value.
171 * Nearest power of two above input value.
173 static inline unsigned int
174 log2above(unsigned int v)
179 for (l = 0, r = 0; (v >> 1); ++l, v >>= 1)
184 #endif /* RTE_PMD_MLX5_UTILS_H_ */