xref: /dpdk/drivers/common/mlx5/mlx5_common.h (revision ad435d3204736e8110cd3ecdf5363ae20f68e66f)

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

#ifndef RTE_PMD_MLX5_COMMON_H_
#define RTE_PMD_MLX5_COMMON_H_

#include <stdio.h>

#include <rte_pci.h>
#include <rte_debug.h>
#include <rte_atomic.h>
#include <rte_log.h>
#include <rte_kvargs.h>
#include <rte_devargs.h>
#include <rte_bitops.h>
#include <rte_lcore.h>
#include <rte_spinlock.h>
#include <rte_os_shim.h>

#include "mlx5_prm.h"
#include "mlx5_devx_cmds.h"
#include "mlx5_common_os.h"

/* Reported driver name. */
#define MLX5_PCI_DRIVER_NAME "mlx5_pci"

/* 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) \
	(void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] |= \
		((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT))))
#define BITFIELD_RESET(bf, b) \
	(void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] &= \
		~((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT))))
#define BITFIELD_ISSET(bf, b) \
	!!(((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] & \
		((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))

/*
 * 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__,)))

#ifdef RTE_LIBRTE_MLX5_DEBUG

#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 /* RTE_LIBRTE_MLX5_DEBUG */
#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 /* RTE_LIBRTE_MLX5_DEBUG */

/* claim_zero() does not perform any check when debugging is disabled. */
#ifdef RTE_LIBRTE_MLX5_DEBUG

#define MLX5_ASSERT(exp) RTE_VERIFY(exp)
#define claim_zero(...) MLX5_ASSERT((__VA_ARGS__) == 0)
#define claim_nonzero(...) MLX5_ASSERT((__VA_ARGS__) != 0)

#else /* RTE_LIBRTE_MLX5_DEBUG */

#define MLX5_ASSERT(exp) RTE_ASSERT(exp)
#define claim_zero(...) (__VA_ARGS__)
#define claim_nonzero(...) (__VA_ARGS__)

#endif /* RTE_LIBRTE_MLX5_DEBUG */

/* 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_CONNECTXVF = 0x101e,
	PCI_DEVICE_ID_MELLANOX_CONNECTX6DXBF = 0xa2d6,
	PCI_DEVICE_ID_MELLANOX_CONNECTX6LX = 0x101f,
	PCI_DEVICE_ID_MELLANOX_CONNECTX7 = 0x1021,
	PCI_DEVICE_ID_MELLANOX_CONNECTX7BF = 0Xa2dc,
};

/* Maximum number of simultaneous unicast MAC addresses. */
#define MLX5_MAX_UC_MAC_ADDRESSES 128
/* Maximum number of simultaneous Multicast MAC addresses. */
#define MLX5_MAX_MC_MAC_ADDRESSES 128
/* Maximum number of simultaneous MAC addresses. */
#define MLX5_MAX_MAC_ADDRESSES \
	(MLX5_MAX_UC_MAC_ADDRESSES + MLX5_MAX_MC_MAC_ADDRESSES)

/* Recognized Infiniband device physical port name types. */
enum mlx5_nl_phys_port_name_type {
	MLX5_PHYS_PORT_NAME_TYPE_NOTSET = 0, /* Not set. */
	MLX5_PHYS_PORT_NAME_TYPE_LEGACY, /* before kernel ver < 5.0 */
	MLX5_PHYS_PORT_NAME_TYPE_UPLINK, /* p0, kernel ver >= 5.0 */
	MLX5_PHYS_PORT_NAME_TYPE_PFVF, /* pf0vf0, kernel ver >= 5.0 */
	MLX5_PHYS_PORT_NAME_TYPE_PFHPF, /* pf0, kernel ver >= 5.7, HPF rep */
	MLX5_PHYS_PORT_NAME_TYPE_PFSF, /* pf0sf0, kernel ver >= 5.0 */
	MLX5_PHYS_PORT_NAME_TYPE_UNKNOWN, /* Unrecognized. */
};

/** Switch information returned by mlx5_nl_switch_info(). */
struct mlx5_switch_info {
	uint32_t master:1; /**< Master device. */
	uint32_t representor:1; /**< Representor device. */
	enum mlx5_nl_phys_port_name_type name_type; /** < Port name type. */
	int32_t ctrl_num; /**< Controller number (valid for c#pf#vf# format). */
	int32_t pf_num; /**< PF number (valid for pfxvfx format only). */
	int32_t port_name; /**< Representor port name. */
	uint64_t switch_id; /**< Switch identifier. */
};

/* 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_io_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;
}

__rte_internal
int mlx5_dev_to_pci_addr(const char *dev_path, struct rte_pci_addr *pci_addr);
__rte_internal
int mlx5_get_ifname_sysfs(const char *ibdev_path, char *ifname);


enum mlx5_class {
	MLX5_CLASS_INVALID,
	MLX5_CLASS_ETH = RTE_BIT64(0),
	MLX5_CLASS_VDPA = RTE_BIT64(1),
	MLX5_CLASS_REGEX = RTE_BIT64(2),
	MLX5_CLASS_COMPRESS = RTE_BIT64(3),
	MLX5_CLASS_CRYPTO = RTE_BIT64(4),
};

#define MLX5_DBR_SIZE RTE_CACHE_LINE_SIZE

/* devX creation object */
struct mlx5_devx_obj {
	void *obj; /* The DV object. */
	int id; /* The object ID. */
};

/* UMR memory buffer used to define 1 entry in indirect mkey. */
struct mlx5_klm {
	uint32_t byte_count;
	uint32_t mkey;
	uint64_t address;
};

__rte_internal
void mlx5_translate_port_name(const char *port_name_in,
			      struct mlx5_switch_info *port_info_out);
void mlx5_glue_constructor(void);
__rte_internal
void *mlx5_devx_alloc_uar(void *ctx, int mapping);
extern uint8_t haswell_broadwell_cpu;

__rte_internal
void mlx5_common_init(void);

/*
 * Common Driver Interface
 *
 * ConnectX common driver supports multiple classes: net, vDPA, regex, crypto
 * and compress devices. This layer enables creating such multiple classes
 * on a single device by allowing to bind multiple class-specific device
 * drivers to attach to the common driver.
 *
 * ------------  -------------  --------------  -----------------  ------------
 * | mlx5 net |  | mlx5 vdpa |  | mlx5 regex |  | mlx5 compress |  | mlx5 ... |
 * |  driver  |  |  driver   |  |   driver   |  |     driver    |  |  drivers |
 * ------------  -------------  --------------  -----------------  ------------
 *                               ||
 *                        -----------------
 *                        |     mlx5      |
 *                        | common driver |
 *                        -----------------
 *                          |          |
 *                 -----------        -----------------
 *                 |   mlx5  |        |   mlx5        |
 *                 | pci dev |        | auxiliary dev |
 *                 -----------        -----------------
 *
 * - mlx5 PCI bus driver binds to mlx5 PCI devices defined by PCI ID table
 *   of all related devices.
 * - mlx5 class driver such as net, vDPA, regex defines its specific
 *   PCI ID table and mlx5 bus driver probes matching class drivers.
 * - mlx5 common driver is central place that validates supported
 *   class combinations.
 * - mlx5 common driver hides bus difference by resolving device address
 *   from devargs, locating target RDMA device and probing with it.
 */

/**
 * Initialization function for the driver called during device probing.
 */
typedef int (mlx5_class_driver_probe_t)(struct rte_device *dev);

/**
 * Uninitialization function for the driver called during hot-unplugging.
 */
typedef int (mlx5_class_driver_remove_t)(struct rte_device *dev);

/**
 * Driver-specific DMA mapping. After a successful call the device
 * will be able to read/write from/to this segment.
 *
 * @param dev
 *   Pointer to the device.
 * @param addr
 *   Starting virtual address of memory to be mapped.
 * @param iova
 *   Starting IOVA address of memory to be mapped.
 * @param len
 *   Length of memory segment being mapped.
 * @return
 *   - 0 On success.
 *   - Negative value and rte_errno is set otherwise.
 */
typedef int (mlx5_class_driver_dma_map_t)(struct rte_device *dev, void *addr,
					  uint64_t iova, size_t len);

/**
 * Driver-specific DMA un-mapping. After a successful call the device
 * will not be able to read/write from/to this segment.
 *
 * @param dev
 *   Pointer to the device.
 * @param addr
 *   Starting virtual address of memory to be unmapped.
 * @param iova
 *   Starting IOVA address of memory to be unmapped.
 * @param len
 *   Length of memory segment being unmapped.
 * @return
 *   - 0 On success.
 *   - Negative value and rte_errno is set otherwise.
 */
typedef int (mlx5_class_driver_dma_unmap_t)(struct rte_device *dev, void *addr,
					    uint64_t iova, size_t len);

/** Device already probed can be probed again to check for new ports. */
#define MLX5_DRV_PROBE_AGAIN 0x0004

/**
 * A structure describing a mlx5 common class driver.
 */
struct mlx5_class_driver {
	TAILQ_ENTRY(mlx5_class_driver) next;
	enum mlx5_class drv_class;            /**< Class of this driver. */
	const char *name;                     /**< Driver name. */
	mlx5_class_driver_probe_t *probe;     /**< Device probe function. */
	mlx5_class_driver_remove_t *remove;   /**< Device remove function. */
	mlx5_class_driver_dma_map_t *dma_map; /**< Device DMA map function. */
	mlx5_class_driver_dma_unmap_t *dma_unmap;
	/**< Device DMA unmap function. */
	const struct rte_pci_id *id_table;    /**< ID table, NULL terminated. */
	uint32_t probe_again:1;
	/**< Device already probed can be probed again to check new device. */
	uint32_t intr_lsc:1; /**< Supports link state interrupt. */
	uint32_t intr_rmv:1; /**< Supports device remove interrupt. */
};

/**
 * Register a mlx5 device driver.
 *
 * @param driver
 *   A pointer to a mlx5_driver structure describing the driver
 *   to be registered.
 */
__rte_internal
void
mlx5_class_driver_register(struct mlx5_class_driver *driver);

/**
 * Test device is a PCI bus device.
 *
 * @param dev
 *   Pointer to device.
 *
 * @return
 *   - True on device devargs is a PCI bus device.
 *   - False otherwise.
 */
__rte_internal
bool
mlx5_dev_is_pci(const struct rte_device *dev);

#endif /* RTE_PMD_MLX5_COMMON_H_ */