core.h

/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
/* Copyright (c) 2015-2018 Mellanox Technologies. All rights reserved */

#ifndef _MLXSW_CORE_H
#define _MLXSW_CORE_H

#include <linux/module.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/gfp.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/workqueue.h>
#include <linux/net_namespace.h>
#include <net/devlink.h>

#include "trap.h"
#include "reg.h"
#include "cmd.h"
#include "resources.h"

struct mlxsw_core;
struct mlxsw_core_port;
struct mlxsw_driver;
struct mlxsw_bus;
struct mlxsw_bus_info;

unsigned int mlxsw_core_max_ports(const struct mlxsw_core *mlxsw_core);

void *mlxsw_core_driver_priv(struct mlxsw_core *mlxsw_core);

bool mlxsw_core_res_query_enabled(const struct mlxsw_core *mlxsw_core);

int mlxsw_core_driver_register(struct mlxsw_driver *mlxsw_driver);
void mlxsw_core_driver_unregister(struct mlxsw_driver *mlxsw_driver);

int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info,
				   const struct mlxsw_bus *mlxsw_bus,
				   void *bus_priv, bool reload,
				   struct devlink *devlink);
void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core, bool reload);

struct mlxsw_tx_info {
	u8 local_port;
	bool is_emad;
};

bool mlxsw_core_skb_transmit_busy(struct mlxsw_core *mlxsw_core,
				  const struct mlxsw_tx_info *tx_info);
int mlxsw_core_skb_transmit(struct mlxsw_core *mlxsw_core, struct sk_buff *skb,
			    const struct mlxsw_tx_info *tx_info);
void mlxsw_core_ptp_transmitted(struct mlxsw_core *mlxsw_core,
				struct sk_buff *skb, u8 local_port);

struct mlxsw_rx_listener {
	void (*func)(struct sk_buff *skb, u8 local_port, void *priv);
	u8 local_port;
	u16 trap_id;
	enum mlxsw_reg_hpkt_action action;
};

struct mlxsw_event_listener {
	void (*func)(const struct mlxsw_reg_info *reg,
		     char *payload, void *priv);
	enum mlxsw_event_trap_id trap_id;
};

struct mlxsw_listener {
	u16 trap_id;
	union {
		struct mlxsw_rx_listener rx_listener;
		struct mlxsw_event_listener event_listener;
	} u;
	enum mlxsw_reg_hpkt_action action;
	enum mlxsw_reg_hpkt_action unreg_action;
	u8 trap_group;
	bool is_ctrl; /* should go via control buffer or not */
	bool is_event;
};

#define MLXSW_RXL(_func, _trap_id, _action, _is_ctrl, _trap_group,	\
		  _unreg_action)					\
	{								\
		.trap_id = MLXSW_TRAP_ID_##_trap_id,			\
		.u.rx_listener =					\
		{							\
			.func = _func,					\
			.local_port = MLXSW_PORT_DONT_CARE,		\
			.trap_id = MLXSW_TRAP_ID_##_trap_id,		\
		},							\
		.action = MLXSW_REG_HPKT_ACTION_##_action,		\
		.unreg_action = MLXSW_REG_HPKT_ACTION_##_unreg_action,	\
		.trap_group = MLXSW_REG_HTGT_TRAP_GROUP_##_trap_group,	\
		.is_ctrl = _is_ctrl,					\
		.is_event = false,					\
	}

#define MLXSW_EVENTL(_func, _trap_id, _trap_group)			\
	{								\
		.trap_id = MLXSW_TRAP_ID_##_trap_id,			\
		.u.event_listener =					\
		{							\
			.func = _func,					\
			.trap_id = MLXSW_TRAP_ID_##_trap_id,		\
		},							\
		.action = MLXSW_REG_HPKT_ACTION_TRAP_TO_CPU,		\
		.trap_group = MLXSW_REG_HTGT_TRAP_GROUP_##_trap_group,	\
		.is_ctrl = false,					\
		.is_event = true,					\
	}

int mlxsw_core_rx_listener_register(struct mlxsw_core *mlxsw_core,
				    const struct mlxsw_rx_listener *rxl,
				    void *priv);
void mlxsw_core_rx_listener_unregister(struct mlxsw_core *mlxsw_core,
				       const struct mlxsw_rx_listener *rxl,
				       void *priv);

int mlxsw_core_event_listener_register(struct mlxsw_core *mlxsw_core,
				       const struct mlxsw_event_listener *el,
				       void *priv);
void mlxsw_core_event_listener_unregister(struct mlxsw_core *mlxsw_core,
					  const struct mlxsw_event_listener *el,
					  void *priv);

int mlxsw_core_trap_register(struct mlxsw_core *mlxsw_core,
			     const struct mlxsw_listener *listener,
			     void *priv);
void mlxsw_core_trap_unregister(struct mlxsw_core *mlxsw_core,
				const struct mlxsw_listener *listener,
				void *priv);
int mlxsw_core_trap_action_set(struct mlxsw_core *mlxsw_core,
			       const struct mlxsw_listener *listener,
			       enum mlxsw_reg_hpkt_action action);

typedef void mlxsw_reg_trans_cb_t(struct mlxsw_core *mlxsw_core, char *payload,
				  size_t payload_len, unsigned long cb_priv);

int mlxsw_reg_trans_query(struct mlxsw_core *mlxsw_core,
			  const struct mlxsw_reg_info *reg, char *payload,
			  struct list_head *bulk_list,
			  mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv);
int mlxsw_reg_trans_write(struct mlxsw_core *mlxsw_core,
			  const struct mlxsw_reg_info *reg, char *payload,
			  struct list_head *bulk_list,
			  mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv);
int mlxsw_reg_trans_bulk_wait(struct list_head *bulk_list);

int mlxsw_reg_query(struct mlxsw_core *mlxsw_core,
		    const struct mlxsw_reg_info *reg, char *payload);
int mlxsw_reg_write(struct mlxsw_core *mlxsw_core,
		    const struct mlxsw_reg_info *reg, char *payload);

struct mlxsw_rx_info {
	bool is_lag;
	union {
		u16 sys_port;
		u16 lag_id;
	} u;
	u8 lag_port_index;
	int trap_id;
};

void mlxsw_core_skb_receive(struct mlxsw_core *mlxsw_core, struct sk_buff *skb,
			    struct mlxsw_rx_info *rx_info);

void mlxsw_core_lag_mapping_set(struct mlxsw_core *mlxsw_core,
				u16 lag_id, u8 port_index, u8 local_port);
u8 mlxsw_core_lag_mapping_get(struct mlxsw_core *mlxsw_core,
			      u16 lag_id, u8 port_index);
void mlxsw_core_lag_mapping_clear(struct mlxsw_core *mlxsw_core,
				  u16 lag_id, u8 local_port);

void *mlxsw_core_port_driver_priv(struct mlxsw_core_port *mlxsw_core_port);
int mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u8 local_port,
			 u32 port_number, bool split,
			 u32 split_port_subnumber,
			 const unsigned char *switch_id,
			 unsigned char switch_id_len);
void mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u8 local_port);
int mlxsw_core_cpu_port_init(struct mlxsw_core *mlxsw_core,
			     void *port_driver_priv,
			     const unsigned char *switch_id,
			     unsigned char switch_id_len);
void mlxsw_core_cpu_port_fini(struct mlxsw_core *mlxsw_core);
void mlxsw_core_port_eth_set(struct mlxsw_core *mlxsw_core, u8 local_port,
			     void *port_driver_priv, struct net_device *dev);
void mlxsw_core_port_ib_set(struct mlxsw_core *mlxsw_core, u8 local_port,
			    void *port_driver_priv);
void mlxsw_core_port_clear(struct mlxsw_core *mlxsw_core, u8 local_port,
			   void *port_driver_priv);
enum devlink_port_type mlxsw_core_port_type_get(struct mlxsw_core *mlxsw_core,
						u8 local_port);
struct devlink_port *
mlxsw_core_port_devlink_port_get(struct mlxsw_core *mlxsw_core,
				 u8 local_port);

int mlxsw_core_schedule_dw(struct delayed_work *dwork, unsigned long delay);
bool mlxsw_core_schedule_work(struct work_struct *work);
void mlxsw_core_flush_owq(void);
int mlxsw_core_resources_query(struct mlxsw_core *mlxsw_core, char *mbox,
			       struct mlxsw_res *res);

#define MLXSW_CONFIG_PROFILE_SWID_COUNT 8

struct mlxsw_swid_config {
	u8	used_type:1,
		used_properties:1;
	u8	type;
	u8	properties;
};

struct mlxsw_config_profile {
	u16	used_max_vepa_channels:1,
		used_max_mid:1,
		used_max_pgt:1,
		used_max_system_port:1,
		used_max_vlan_groups:1,
		used_max_regions:1,
		used_flood_tables:1,
		used_flood_mode:1,
		used_max_ib_mc:1,
		used_max_pkey:1,
		used_ar_sec:1,
		used_adaptive_routing_group_cap:1,
		used_kvd_sizes:1;
	u8	max_vepa_channels;
	u16	max_mid;
	u16	max_pgt;
	u16	max_system_port;
	u16	max_vlan_groups;
	u16	max_regions;
	u8	max_flood_tables;
	u8	max_vid_flood_tables;
	u8	flood_mode;
	u8	max_fid_offset_flood_tables;
	u16	fid_offset_flood_table_size;
	u8	max_fid_flood_tables;
	u16	fid_flood_table_size;
	u16	max_ib_mc;
	u16	max_pkey;
	u8	ar_sec;
	u16	adaptive_routing_group_cap;
	u8	arn;
	u32	kvd_linear_size;
	u8	kvd_hash_single_parts;
	u8	kvd_hash_double_parts;
	struct mlxsw_swid_config swid_config[MLXSW_CONFIG_PROFILE_SWID_COUNT];
};

struct mlxsw_driver {
	struct list_head list;
	const char *kind;
	size_t priv_size;
	int (*init)(struct mlxsw_core *mlxsw_core,
		    const struct mlxsw_bus_info *mlxsw_bus_info);
	void (*fini)(struct mlxsw_core *mlxsw_core);
	int (*basic_trap_groups_set)(struct mlxsw_core *mlxsw_core);
	int (*port_type_set)(struct mlxsw_core *mlxsw_core, u8 local_port,
			     enum devlink_port_type new_type);
	int (*port_split)(struct mlxsw_core *mlxsw_core, u8 local_port,
			  unsigned int count, struct netlink_ext_ack *extack);
	int (*port_unsplit)(struct mlxsw_core *mlxsw_core, u8 local_port,
			    struct netlink_ext_ack *extack);
	int (*sb_pool_get)(struct mlxsw_core *mlxsw_core,
			   unsigned int sb_index, u16 pool_index,
			   struct devlink_sb_pool_info *pool_info);
	int (*sb_pool_set)(struct mlxsw_core *mlxsw_core,
			   unsigned int sb_index, u16 pool_index, u32 size,
			   enum devlink_sb_threshold_type threshold_type,
			   struct netlink_ext_ack *extack);
	int (*sb_port_pool_get)(struct mlxsw_core_port *mlxsw_core_port,
				unsigned int sb_index, u16 pool_index,
				u32 *p_threshold);
	int (*sb_port_pool_set)(struct mlxsw_core_port *mlxsw_core_port,
				unsigned int sb_index, u16 pool_index,
				u32 threshold, struct netlink_ext_ack *extack);
	int (*sb_tc_pool_bind_get)(struct mlxsw_core_port *mlxsw_core_port,
				   unsigned int sb_index, u16 tc_index,
				   enum devlink_sb_pool_type pool_type,
				   u16 *p_pool_index, u32 *p_threshold);
	int (*sb_tc_pool_bind_set)(struct mlxsw_core_port *mlxsw_core_port,
				   unsigned int sb_index, u16 tc_index,
				   enum devlink_sb_pool_type pool_type,
				   u16 pool_index, u32 threshold,
				   struct netlink_ext_ack *extack);
	int (*sb_occ_snapshot)(struct mlxsw_core *mlxsw_core,
			       unsigned int sb_index);
	int (*sb_occ_max_clear)(struct mlxsw_core *mlxsw_core,
				unsigned int sb_index);
	int (*sb_occ_port_pool_get)(struct mlxsw_core_port *mlxsw_core_port,
				    unsigned int sb_index, u16 pool_index,
				    u32 *p_cur, u32 *p_max);
	int (*sb_occ_tc_port_bind_get)(struct mlxsw_core_port *mlxsw_core_port,
				       unsigned int sb_index, u16 tc_index,
				       enum devlink_sb_pool_type pool_type,
				       u32 *p_cur, u32 *p_max);
	int (*flash_update)(struct mlxsw_core *mlxsw_core,
			    const char *file_name, const char *component,
			    struct netlink_ext_ack *extack);
	int (*trap_init)(struct mlxsw_core *mlxsw_core,
			 const struct devlink_trap *trap, void *trap_ctx);
	void (*trap_fini)(struct mlxsw_core *mlxsw_core,
			  const struct devlink_trap *trap, void *trap_ctx);
	int (*trap_action_set)(struct mlxsw_core *mlxsw_core,
			       const struct devlink_trap *trap,
			       enum devlink_trap_action action);
	int (*trap_group_init)(struct mlxsw_core *mlxsw_core,
			       const struct devlink_trap_group *group);
	void (*txhdr_construct)(struct sk_buff *skb,
				const struct mlxsw_tx_info *tx_info);
	int (*resources_register)(struct mlxsw_core *mlxsw_core);
	int (*kvd_sizes_get)(struct mlxsw_core *mlxsw_core,
			     const struct mlxsw_config_profile *profile,
			     u64 *p_single_size, u64 *p_double_size,
			     u64 *p_linear_size);
	int (*params_register)(struct mlxsw_core *mlxsw_core);
	void (*params_unregister)(struct mlxsw_core *mlxsw_core);

	/* Notify a driver that a timestamped packet was transmitted. Driver
	 * is responsible for freeing the passed-in SKB.
	 */
	void (*ptp_transmitted)(struct mlxsw_core *mlxsw_core,
				struct sk_buff *skb, u8 local_port);

	u8 txhdr_len;
	const struct mlxsw_config_profile *profile;
	bool res_query_enabled;
};

int mlxsw_core_kvd_sizes_get(struct mlxsw_core *mlxsw_core,
			     const struct mlxsw_config_profile *profile,
			     u64 *p_single_size, u64 *p_double_size,
			     u64 *p_linear_size);

void mlxsw_core_fw_flash_start(struct mlxsw_core *mlxsw_core);
void mlxsw_core_fw_flash_end(struct mlxsw_core *mlxsw_core);

u32 mlxsw_core_read_frc_h(struct mlxsw_core *mlxsw_core);
u32 mlxsw_core_read_frc_l(struct mlxsw_core *mlxsw_core);

bool mlxsw_core_res_valid(struct mlxsw_core *mlxsw_core,
			  enum mlxsw_res_id res_id);

#define MLXSW_CORE_RES_VALID(mlxsw_core, short_res_id)			\
	mlxsw_core_res_valid(mlxsw_core, MLXSW_RES_ID_##short_res_id)

u64 mlxsw_core_res_get(struct mlxsw_core *mlxsw_core,
		       enum mlxsw_res_id res_id);

#define MLXSW_CORE_RES_GET(mlxsw_core, short_res_id)			\
	mlxsw_core_res_get(mlxsw_core, MLXSW_RES_ID_##short_res_id)

static inline struct net *mlxsw_core_net(struct mlxsw_core *mlxsw_core)
{
	return devlink_net(priv_to_devlink(mlxsw_core));
}

#define MLXSW_BUS_F_TXRX	BIT(0)
#define MLXSW_BUS_F_RESET	BIT(1)

struct mlxsw_bus {
	const char *kind;
	int (*init)(void *bus_priv, struct mlxsw_core *mlxsw_core,
		    const struct mlxsw_config_profile *profile,
		    struct mlxsw_res *res);
	void (*fini)(void *bus_priv);
	bool (*skb_transmit_busy)(void *bus_priv,
				  const struct mlxsw_tx_info *tx_info);
	int (*skb_transmit)(void *bus_priv, struct sk_buff *skb,
			    const struct mlxsw_tx_info *tx_info);
	int (*cmd_exec)(void *bus_priv, u16 opcode, u8 opcode_mod,
			u32 in_mod, bool out_mbox_direct,
			char *in_mbox, size_t in_mbox_size,
			char *out_mbox, size_t out_mbox_size,
			u8 *p_status);
	u32 (*read_frc_h)(void *bus_priv);
	u32 (*read_frc_l)(void *bus_priv);
	u8 features;
};

struct mlxsw_fw_rev {
	u16 major;
	u16 minor;
	u16 subminor;
	u16 can_reset_minor;
};

struct mlxsw_bus_info {
	const char *device_kind;
	const char *device_name;
	struct device *dev;
	struct mlxsw_fw_rev fw_rev;
	u8 vsd[MLXSW_CMD_BOARDINFO_VSD_LEN];
	u8 psid[MLXSW_CMD_BOARDINFO_PSID_LEN];
	u8 low_frequency:1,
	   read_frc_capable:1;
};

struct mlxsw_hwmon;

#ifdef CONFIG_MLXSW_CORE_HWMON

int mlxsw_hwmon_init(struct mlxsw_core *mlxsw_core,
		     const struct mlxsw_bus_info *mlxsw_bus_info,
		     struct mlxsw_hwmon **p_hwmon);
void mlxsw_hwmon_fini(struct mlxsw_hwmon *mlxsw_hwmon);

#else

static inline int mlxsw_hwmon_init(struct mlxsw_core *mlxsw_core,
				   const struct mlxsw_bus_info *mlxsw_bus_info,
				   struct mlxsw_hwmon **p_hwmon)
{
	return 0;
}

static inline void mlxsw_hwmon_fini(struct mlxsw_hwmon *mlxsw_hwmon)
{
}

#endif

struct mlxsw_thermal;

#ifdef CONFIG_MLXSW_CORE_THERMAL

int mlxsw_thermal_init(struct mlxsw_core *mlxsw_core,
		       const struct mlxsw_bus_info *mlxsw_bus_info,
		       struct mlxsw_thermal **p_thermal);
void mlxsw_thermal_fini(struct mlxsw_thermal *thermal);

#else

static inline int mlxsw_thermal_init(struct mlxsw_core *mlxsw_core,
				     const struct mlxsw_bus_info *mlxsw_bus_info,
				     struct mlxsw_thermal **p_thermal)
{
	return 0;
}

static inline void mlxsw_thermal_fini(struct mlxsw_thermal *thermal)
{
}

#endif

enum mlxsw_devlink_param_id {
	MLXSW_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
	MLXSW_DEVLINK_PARAM_ID_ACL_REGION_REHASH_INTERVAL,
};

struct mlxsw_skb_cb {
	struct mlxsw_tx_info tx_info;
};

static inline struct mlxsw_skb_cb *mlxsw_skb_cb(struct sk_buff *skb)
{
	BUILD_BUG_ON(sizeof(mlxsw_skb_cb) > sizeof(skb->cb));
	return (struct mlxsw_skb_cb *) skb->cb;
}

#endif