diff options
Diffstat (limited to 'src/spdk/dpdk/drivers/net/mlx5/mlx5_utils.h')
| -rw-r--r-- | src/spdk/dpdk/drivers/net/mlx5/mlx5_utils.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/src/spdk/dpdk/drivers/net/mlx5/mlx5_utils.h b/src/spdk/dpdk/drivers/net/mlx5/mlx5_utils.h new file mode 100644 index 00000000..886f60e6 --- /dev/null +++ b/src/spdk/dpdk/drivers/net/mlx5/mlx5_utils.h @@ -0,0 +1,163 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright 2015 6WIND S.A. + * Copyright 2015 Mellanox Technologies, Ltd + */ + +#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; +} + +extern int mlx5_logtype; + +#define PMD_DRV_LOG___(level, ...) \ + rte_log(RTE_LOG_ ## level, \ + mlx5_logtype, \ + RTE_FMT(MLX5_DRIVER_NAME ": " \ + RTE_FMT_HEAD(__VA_ARGS__,), \ + RTE_FMT_TAIL(__VA_ARGS__,))) + +/* + * 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, ...) \ + 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, ...) \ + 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 DRV_LOG(level, ...) \ + PMD_DRV_LOG_(level, \ + __VA_ARGS__ PMD_DRV_LOG_STRIP PMD_DRV_LOG_OPAREN, \ + PMD_DRV_LOG_CPAREN) + +/* claim_zero() does not perform any check when debugging is disabled. */ +#ifndef NDEBUG + +#define DEBUG(...) DRV_LOG(DEBUG, __VA_ARGS__) +#define claim_zero(...) assert((__VA_ARGS__) == 0) +#define claim_nonzero(...) assert((__VA_ARGS__) != 0) + +#else /* NDEBUG */ + +#define DEBUG(...) (void)0 +#define claim_zero(...) (__VA_ARGS__) +#define claim_nonzero(...) (__VA_ARGS__) + +#endif /* NDEBUG */ + +#define INFO(...) DRV_LOG(INFO, __VA_ARGS__) +#define WARN(...) DRV_LOG(WARNING, __VA_ARGS__) +#define ERROR(...) 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_ */ |