/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2018 Netronome Systems, Inc.
 * All rights reserved.
 */

#ifndef NSP_NSP_H
#define NSP_NSP_H 1

#include "nfp_cpp.h"
#include "nfp_nsp.h"

#define GENMASK_ULL(h, l) \
	(((~0ULL) - (1ULL << (l)) + 1) & \
	 (~0ULL >> (64 - 1 - (h))))

#define __bf_shf(x) (__builtin_ffsll(x) - 1)

#define FIELD_GET(_mask, _reg)	\
	(__extension__ ({ \
		typeof(_mask) _x = (_mask); \
		(typeof(_x))(((_reg) & (_x)) >> __bf_shf(_x));	\
	}))

#define FIELD_FIT(_mask, _val)						\
	(__extension__ ({ \
		typeof(_mask) _x = (_mask); \
		!((((typeof(_x))_val) << __bf_shf(_x)) & ~(_x)); \
	}))

#define FIELD_PREP(_mask, _val)						\
	(__extension__ ({ \
		typeof(_mask) _x = (_mask); \
		((typeof(_x))(_val) << __bf_shf(_x)) & (_x);	\
	}))

/* Offsets relative to the CSR base */
#define NSP_STATUS		0x00
#define   NSP_STATUS_MAGIC	GENMASK_ULL(63, 48)
#define   NSP_STATUS_MAJOR	GENMASK_ULL(47, 44)
#define   NSP_STATUS_MINOR	GENMASK_ULL(43, 32)
#define   NSP_STATUS_CODE	GENMASK_ULL(31, 16)
#define   NSP_STATUS_RESULT	GENMASK_ULL(15, 8)
#define   NSP_STATUS_BUSY	BIT_ULL(0)

#define NSP_COMMAND		0x08
#define   NSP_COMMAND_OPTION	GENMASK_ULL(63, 32)
#define   NSP_COMMAND_CODE	GENMASK_ULL(31, 16)
#define   NSP_COMMAND_START	BIT_ULL(0)

/* CPP address to retrieve the data from */
#define NSP_BUFFER		0x10
#define   NSP_BUFFER_CPP	GENMASK_ULL(63, 40)
#define   NSP_BUFFER_PCIE	GENMASK_ULL(39, 38)
#define   NSP_BUFFER_ADDRESS	GENMASK_ULL(37, 0)

#define NSP_DFLT_BUFFER		0x18

#define NSP_DFLT_BUFFER_CONFIG	0x20
#define   NSP_DFLT_BUFFER_SIZE_MB	GENMASK_ULL(7, 0)

#define NSP_MAGIC		0xab10
#define NSP_MAJOR		0
#define NSP_MINOR		8

#define NSP_CODE_MAJOR		GENMASK(15, 12)
#define NSP_CODE_MINOR		GENMASK(11, 0)

enum nfp_nsp_cmd {
	SPCODE_NOOP		= 0, /* No operation */
	SPCODE_SOFT_RESET	= 1, /* Soft reset the NFP */
	SPCODE_FW_DEFAULT	= 2, /* Load default (UNDI) FW */
	SPCODE_PHY_INIT		= 3, /* Initialize the PHY */
	SPCODE_MAC_INIT		= 4, /* Initialize the MAC */
	SPCODE_PHY_RXADAPT	= 5, /* Re-run PHY RX Adaptation */
	SPCODE_FW_LOAD		= 6, /* Load fw from buffer, len in option */
	SPCODE_ETH_RESCAN	= 7, /* Rescan ETHs, write ETH_TABLE to buf */
	SPCODE_ETH_CONTROL	= 8, /* Update media config from buffer */
	SPCODE_NSP_SENSORS	= 12, /* Read NSP sensor(s) */
	SPCODE_NSP_IDENTIFY	= 13, /* Read NSP version */
};

static const struct {
	int code;
	const char *msg;
} nsp_errors[] = {
	{ 6010, "could not map to phy for port" },
	{ 6011, "not an allowed rate/lanes for port" },
	{ 6012, "not an allowed rate/lanes for port" },
	{ 6013, "high/low error, change other port first" },
	{ 6014, "config not found in flash" },
};

struct nfp_nsp {
	struct nfp_cpp *cpp;
	struct nfp_resource *res;
	struct {
		uint16_t major;
		uint16_t minor;
	} ver;

	/* Eth table config state */
	int modified;
	unsigned int idx;
	void *entries;
};

struct nfp_nsp *nfp_nsp_open(struct nfp_cpp *cpp);
void nfp_nsp_close(struct nfp_nsp *state);
uint16_t nfp_nsp_get_abi_ver_major(struct nfp_nsp *state);
uint16_t nfp_nsp_get_abi_ver_minor(struct nfp_nsp *state);
int nfp_nsp_wait(struct nfp_nsp *state);
int nfp_nsp_device_soft_reset(struct nfp_nsp *state);
int nfp_nsp_load_fw(struct nfp_nsp *state, void *buf, unsigned int size);
int nfp_nsp_mac_reinit(struct nfp_nsp *state);
int nfp_nsp_read_identify(struct nfp_nsp *state, void *buf, unsigned int size);
int nfp_nsp_read_sensors(struct nfp_nsp *state, unsigned int sensor_mask,
			 void *buf, unsigned int size);

static inline int nfp_nsp_has_mac_reinit(struct nfp_nsp *state)
{
	return nfp_nsp_get_abi_ver_minor(state) > 20;
}

enum nfp_eth_interface {
	NFP_INTERFACE_NONE	= 0,
	NFP_INTERFACE_SFP	= 1,
	NFP_INTERFACE_SFPP	= 10,
	NFP_INTERFACE_SFP28	= 28,
	NFP_INTERFACE_QSFP	= 40,
	NFP_INTERFACE_CXP	= 100,
	NFP_INTERFACE_QSFP28	= 112,
};

enum nfp_eth_media {
	NFP_MEDIA_DAC_PASSIVE = 0,
	NFP_MEDIA_DAC_ACTIVE,
	NFP_MEDIA_FIBRE,
};

enum nfp_eth_aneg {
	NFP_ANEG_AUTO = 0,
	NFP_ANEG_SEARCH,
	NFP_ANEG_25G_CONSORTIUM,
	NFP_ANEG_25G_IEEE,
	NFP_ANEG_DISABLED,
};

enum nfp_eth_fec {
	NFP_FEC_AUTO_BIT = 0,
	NFP_FEC_BASER_BIT,
	NFP_FEC_REED_SOLOMON_BIT,
	NFP_FEC_DISABLED_BIT,
};

#define NFP_FEC_AUTO		BIT(NFP_FEC_AUTO_BIT)
#define NFP_FEC_BASER		BIT(NFP_FEC_BASER_BIT)
#define NFP_FEC_REED_SOLOMON	BIT(NFP_FEC_REED_SOLOMON_BIT)
#define NFP_FEC_DISABLED	BIT(NFP_FEC_DISABLED_BIT)

#define ETH_ALEN	6

/**
 * struct nfp_eth_table - ETH table information
 * @count:	number of table entries
 * @max_index:	max of @index fields of all @ports
 * @ports:	table of ports
 *
 * @eth_index:	port index according to legacy ethX numbering
 * @index:	chip-wide first channel index
 * @nbi:	NBI index
 * @base:	first channel index (within NBI)
 * @lanes:	number of channels
 * @speed:	interface speed (in Mbps)
 * @interface:	interface (module) plugged in
 * @media:	media type of the @interface
 * @fec:	forward error correction mode
 * @aneg:	auto negotiation mode
 * @mac_addr:	interface MAC address
 * @label_port:	port id
 * @label_subport:  id of interface within port (for split ports)
 * @enabled:	is enabled?
 * @tx_enabled:	is TX enabled?
 * @rx_enabled:	is RX enabled?
 * @override_changed: is media reconfig pending?
 *
 * @port_type:	one of %PORT_* defines for ethtool
 * @port_lanes:	total number of lanes on the port (sum of lanes of all subports)
 * @is_split:	is interface part of a split port
 * @fec_modes_supported:	bitmap of FEC modes supported
 */
struct nfp_eth_table {
	unsigned int count;
	unsigned int max_index;
	struct nfp_eth_table_port {
		unsigned int eth_index;
		unsigned int index;
		unsigned int nbi;
		unsigned int base;
		unsigned int lanes;
		unsigned int speed;

		unsigned int interface;
		enum nfp_eth_media media;

		enum nfp_eth_fec fec;
		enum nfp_eth_aneg aneg;

		uint8_t mac_addr[ETH_ALEN];

		uint8_t label_port;
		uint8_t label_subport;

		int enabled;
		int tx_enabled;
		int rx_enabled;

		int override_changed;

		/* Computed fields */
		uint8_t port_type;

		unsigned int port_lanes;

		int is_split;

		unsigned int fec_modes_supported;
	} ports[0];
};

struct nfp_eth_table *nfp_eth_read_ports(struct nfp_cpp *cpp);

int nfp_eth_set_mod_enable(struct nfp_cpp *cpp, unsigned int idx, int enable);
int nfp_eth_set_configured(struct nfp_cpp *cpp, unsigned int idx,
			   int configed);
int
nfp_eth_set_fec(struct nfp_cpp *cpp, unsigned int idx, enum nfp_eth_fec mode);

int nfp_nsp_read_eth_table(struct nfp_nsp *state, void *buf, unsigned int size);
int nfp_nsp_write_eth_table(struct nfp_nsp *state, const void *buf,
			    unsigned int size);
void nfp_nsp_config_set_state(struct nfp_nsp *state, void *entries,
			      unsigned int idx);
void nfp_nsp_config_clear_state(struct nfp_nsp *state);
void nfp_nsp_config_set_modified(struct nfp_nsp *state, int modified);
void *nfp_nsp_config_entries(struct nfp_nsp *state);
int nfp_nsp_config_modified(struct nfp_nsp *state);
unsigned int nfp_nsp_config_idx(struct nfp_nsp *state);

static inline int nfp_eth_can_support_fec(struct nfp_eth_table_port *eth_port)
{
	return !!eth_port->fec_modes_supported;
}

static inline unsigned int
nfp_eth_supported_fec_modes(struct nfp_eth_table_port *eth_port)
{
	return eth_port->fec_modes_supported;
}

struct nfp_nsp *nfp_eth_config_start(struct nfp_cpp *cpp, unsigned int idx);
int nfp_eth_config_commit_end(struct nfp_nsp *nsp);
void nfp_eth_config_cleanup_end(struct nfp_nsp *nsp);

int __nfp_eth_set_aneg(struct nfp_nsp *nsp, enum nfp_eth_aneg mode);
int __nfp_eth_set_speed(struct nfp_nsp *nsp, unsigned int speed);
int __nfp_eth_set_split(struct nfp_nsp *nsp, unsigned int lanes);

/**
 * struct nfp_nsp_identify - NSP static information
 * @version:      opaque version string
 * @flags:        version flags
 * @br_primary:   branch id of primary bootloader
 * @br_secondary: branch id of secondary bootloader
 * @br_nsp:       branch id of NSP
 * @primary:      version of primarary bootloader
 * @secondary:    version id of secondary bootloader
 * @nsp:          version id of NSP
 * @sensor_mask:  mask of present sensors available on NIC
 */
struct nfp_nsp_identify {
	char version[40];
	uint8_t flags;
	uint8_t br_primary;
	uint8_t br_secondary;
	uint8_t br_nsp;
	uint16_t primary;
	uint16_t secondary;
	uint16_t nsp;
	uint64_t sensor_mask;
};

struct nfp_nsp_identify *__nfp_nsp_identify(struct nfp_nsp *nsp);

enum nfp_nsp_sensor_id {
	NFP_SENSOR_CHIP_TEMPERATURE,
	NFP_SENSOR_ASSEMBLY_POWER,
	NFP_SENSOR_ASSEMBLY_12V_POWER,
	NFP_SENSOR_ASSEMBLY_3V3_POWER,
};

int nfp_hwmon_read_sensor(struct nfp_cpp *cpp, enum nfp_nsp_sensor_id id,
			  long *val);

#endif