/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright 2019 Mellanox Technologies, Ltd
 */

#ifndef RTE_PMD_MLX5_COMMON_H_
#define RTE_PMD_MLX5_COMMON_H_

#include <assert.h>
#include <stdio.h>

#include <rte_pci.h>
#include <rte_atomic.h>
#include <rte_log.h>

#include "mlx5_prm.h"


/*
 * 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;
}

#define PMD_DRV_LOG___(level, type, name, ...) \
	rte_log(RTE_LOG_ ## level, \
		type, \
		RTE_FMT(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, type, name, ...) \
	PMD_DRV_LOG___(level, type, name, "%s:%u: %s(): " __VA_ARGS__)
#define PMD_DRV_LOG_(level, type, name, s, ...) \
	PMD_DRV_LOG__(level, type, name,\
		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, type, name, ...) \
	PMD_DRV_LOG___(level, type, name, __VA_ARGS__)
#define PMD_DRV_LOG_(level, type, name, s, ...) \
	PMD_DRV_LOG__(level, type, name, s "\n", __VA_ARGS__)

#endif /* NDEBUG */

/* 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 */

/* Allocate a buffer on the stack and fill it with a printf format string. */
#define MKSTR(name, ...) \
	int mkstr_size_##name = snprintf(NULL, 0, "" __VA_ARGS__); \
	char name[mkstr_size_##name + 1]; \
	\
	snprintf(name, sizeof(name), "" __VA_ARGS__)

enum {
	PCI_VENDOR_ID_MELLANOX = 0x15b3,
};

enum {
	PCI_DEVICE_ID_MELLANOX_CONNECTX4 = 0x1013,
	PCI_DEVICE_ID_MELLANOX_CONNECTX4VF = 0x1014,
	PCI_DEVICE_ID_MELLANOX_CONNECTX4LX = 0x1015,
	PCI_DEVICE_ID_MELLANOX_CONNECTX4LXVF = 0x1016,
	PCI_DEVICE_ID_MELLANOX_CONNECTX5 = 0x1017,
	PCI_DEVICE_ID_MELLANOX_CONNECTX5VF = 0x1018,
	PCI_DEVICE_ID_MELLANOX_CONNECTX5EX = 0x1019,
	PCI_DEVICE_ID_MELLANOX_CONNECTX5EXVF = 0x101a,
	PCI_DEVICE_ID_MELLANOX_CONNECTX5BF = 0xa2d2,
	PCI_DEVICE_ID_MELLANOX_CONNECTX5BFVF = 0xa2d3,
	PCI_DEVICE_ID_MELLANOX_CONNECTX6 = 0x101b,
	PCI_DEVICE_ID_MELLANOX_CONNECTX6VF = 0x101c,
	PCI_DEVICE_ID_MELLANOX_CONNECTX6DX = 0x101d,
	PCI_DEVICE_ID_MELLANOX_CONNECTX6DXVF = 0x101e,
};

/* CQE status. */
enum mlx5_cqe_status {
	MLX5_CQE_STATUS_SW_OWN = -1,
	MLX5_CQE_STATUS_HW_OWN = -2,
	MLX5_CQE_STATUS_ERR = -3,
};

/**
 * Check whether CQE is valid.
 *
 * @param cqe
 *   Pointer to CQE.
 * @param cqes_n
 *   Size of completion queue.
 * @param ci
 *   Consumer index.
 *
 * @return
 *   The CQE status.
 */
static __rte_always_inline enum mlx5_cqe_status
check_cqe(volatile struct mlx5_cqe *cqe, const uint16_t cqes_n,
	  const uint16_t ci)
{
	const uint16_t idx = ci & cqes_n;
	const uint8_t op_own = cqe->op_own;
	const uint8_t op_owner = MLX5_CQE_OWNER(op_own);
	const uint8_t op_code = MLX5_CQE_OPCODE(op_own);

	if (unlikely((op_owner != (!!(idx))) || (op_code == MLX5_CQE_INVALID)))
		return MLX5_CQE_STATUS_HW_OWN;
	rte_cio_rmb();
	if (unlikely(op_code == MLX5_CQE_RESP_ERR ||
		     op_code == MLX5_CQE_REQ_ERR))
		return MLX5_CQE_STATUS_ERR;
	return MLX5_CQE_STATUS_SW_OWN;
}

int mlx5_dev_to_pci_addr(const char *dev_path, struct rte_pci_addr *pci_addr);

#endif /* RTE_PMD_MLX5_COMMON_H_ */