1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2015 6WIND S.A.
3 * Copyright 2015 Mellanox Technologies, Ltd
6 #ifndef RTE_PMD_MLX5_UTILS_H_
7 #define RTE_PMD_MLX5_UTILS_H_
16 #include "mlx5_defs.h"
18 /* Bit-field manipulation. */
19 #define BITFIELD_DECLARE(bf, type, size) \
20 type bf[(((size_t)(size) / (sizeof(type) * CHAR_BIT)) + \
21 !!((size_t)(size) % (sizeof(type) * CHAR_BIT)))]
22 #define BITFIELD_DEFINE(bf, type, size) \
23 BITFIELD_DECLARE((bf), type, (size)) = { 0 }
24 #define BITFIELD_SET(bf, b) \
25 (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
26 (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] |= \
27 ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
28 #define BITFIELD_RESET(bf, b) \
29 (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
30 (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] &= \
31 ~((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
32 #define BITFIELD_ISSET(bf, b) \
33 (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)), \
34 !!(((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] & \
35 ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT))))))
37 /* Convert a bit number to the corresponding 64-bit mask */
38 #define MLX5_BITSHIFT(v) (UINT64_C(1) << (v))
40 /* Save and restore errno around argument evaluation. */
41 #define ERRNO_SAFE(x) ((errno = (int []){ errno, ((x), 0) }[0]))
44 * Helper macros to work around __VA_ARGS__ limitations in a C99 compliant
47 #define PMD_DRV_LOG_STRIP(a, b) a
48 #define PMD_DRV_LOG_OPAREN (
49 #define PMD_DRV_LOG_CPAREN )
50 #define PMD_DRV_LOG_COMMA ,
52 /* Return the file name part of a path. */
53 static inline const char *
54 pmd_drv_log_basename(const char *s)
64 extern int mlx5_logtype;
66 #define PMD_DRV_LOG___(level, ...) \
67 rte_log(RTE_LOG_ ## level, \
69 RTE_FMT(MLX5_DRIVER_NAME ": " \
70 RTE_FMT_HEAD(__VA_ARGS__,), \
71 RTE_FMT_TAIL(__VA_ARGS__,)))
74 * When debugging is enabled (NDEBUG not defined), file, line and function
75 * information replace the driver name (MLX5_DRIVER_NAME) in log messages.
79 #define PMD_DRV_LOG__(level, ...) \
80 PMD_DRV_LOG___(level, "%s:%u: %s(): " __VA_ARGS__)
81 #define PMD_DRV_LOG_(level, s, ...) \
82 PMD_DRV_LOG__(level, \
83 s "\n" PMD_DRV_LOG_COMMA \
84 pmd_drv_log_basename(__FILE__) PMD_DRV_LOG_COMMA \
85 __LINE__ PMD_DRV_LOG_COMMA \
90 #define PMD_DRV_LOG__(level, ...) \
91 PMD_DRV_LOG___(level, __VA_ARGS__)
92 #define PMD_DRV_LOG_(level, s, ...) \
93 PMD_DRV_LOG__(level, s "\n", __VA_ARGS__)
97 /* Generic printf()-like logging macro with automatic line feed. */
98 #define DRV_LOG(level, ...) \
100 __VA_ARGS__ PMD_DRV_LOG_STRIP PMD_DRV_LOG_OPAREN, \
103 /* claim_zero() does not perform any check when debugging is disabled. */
106 #define claim_zero(...) assert((__VA_ARGS__) == 0)
107 #define claim_nonzero(...) assert((__VA_ARGS__) != 0)
111 #define claim_zero(...) (__VA_ARGS__)
112 #define claim_nonzero(...) (__VA_ARGS__)
116 /* Convenience macros for accessing mbuf fields. */
117 #define NEXT(m) ((m)->next)
118 #define DATA_LEN(m) ((m)->data_len)
119 #define PKT_LEN(m) ((m)->pkt_len)
120 #define DATA_OFF(m) ((m)->data_off)
121 #define SET_DATA_OFF(m, o) ((m)->data_off = (o))
122 #define NB_SEGS(m) ((m)->nb_segs)
123 #define PORT(m) ((m)->port)
125 /* Transpose flags. Useful to convert IBV to DPDK flags. */
126 #define TRANSPOSE(val, from, to) \
127 (((from) >= (to)) ? \
128 (((val) & (from)) / ((from) / (to))) : \
129 (((val) & (from)) * ((to) / (from))))
131 /* Allocate a buffer on the stack and fill it with a printf format string. */
132 #define MKSTR(name, ...) \
133 char name[snprintf(NULL, 0, __VA_ARGS__) + 1]; \
135 snprintf(name, sizeof(name), __VA_ARGS__)
138 * Return nearest power of two above input value.
144 * Nearest power of two above input value.
146 static inline unsigned int
147 log2above(unsigned int v)
152 for (l = 0, r = 0; (v >> 1); ++l, v >>= 1)
157 #endif /* RTE_PMD_MLX5_UTILS_H_ */