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  +   €l–Ь4э( ©і( 	ЕЂfаB¦-яВ„н:ч_†I|ҐЏ+ВБ ?ч     /* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * RapidIO interconnect services
 * (RapidIO Interconnect Specification, http://www.rapidio.org)
 *
 * Copyright 2005 MontaVista Software, Inc.
 * Matt Porter <mporter@kernel.crashing.org>
 */

#ifndef LINUX_RIO_H
#define LINUX_RIO_H

#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/device.h>
#include <linux/rio_regs.h>
#include <linux/mod_devicetable.h>
#ifdef CONFIG_RAPIDIO_DMA_ENGINE
#include <linux/dmaengine.h>
#endif

#define RIO_NO_HOPCOUNT		-1
#define RIO_INVALID_DESTID	0xffff

#define RIO_MAX_MPORTS		8
#define RIO_MAX_MPORT_RESOURCES	16
#define RIO_MAX_DEV_RESOURCES	16
#define RIO_MAX_MPORT_NAME	40

#define RIO_GLOBAL_TABLE	0xff	/* Indicates access of a switch's
					   global routing table if it
					   has multiple (or per port)
					   tables */

#define RIO_INVALID_ROUTE	0xff	/* Indicates that a route table
					   entry is invalid (no route
					   exists for the device ID) */

#define RIO_MAX_ROUTE_ENTRIES(size)	(size ? (1 << 16) : (1 << 8))
#define RIO_ANY_DESTID(size)		(size ? 0xffff : 0xff)

#define RIO_MAX_MBOX		4
#define RIO_MAX_MSG_SIZE	0x1000

/*
 * Error values that may be returned by RIO functions.
 */
#define RIO_SUCCESSFUL			0x00
#define RIO_BAD_SIZE			0x81

/*
 * For RIO devices, the region numbers are assigned this way:
 *
 *	0	RapidIO outbound doorbells
 *      1-15	RapidIO memory regions
 *
 * For RIO master ports, the region number are assigned this way:
 *
 *	0	RapidIO inbound doorbells
 *	1	RapidIO inbound mailboxes
 *	2	RapidIO outbound mailboxes
 */
#define RIO_DOORBELL_RESOURCE	0
#define RIO_INB_MBOX_RESOURCE	1
#define RIO_OUTB_MBOX_RESOURCE	2

#define RIO_PW_MSG_SIZE		64

/*
 * A component tag value (stored in the component tag CSR) is used as device's
 * unique identifier assigned during enumeration. Besides being used for
 * identifying switches (which do not have device ID register), it also is used
 * by error management notification and therefore has to be assigned
 * to endpoints as well.
 */
#define RIO_CTAG_RESRVD	0xfffe0000 /* Reserved */
#define RIO_CTAG_UDEVID	0x0001ffff /* Unique device identifier */

extern struct bus_type rio_bus_type;
extern struct class rio_mport_class;

struct rio_mport;
struct rio_dev;
union rio_pw_msg;

/**
 * struct rio_switch - RIO switch info
 * @node: Node in global list of switches
 * @route_table: Copy of switch routing table
 * @port_ok: Status of each port (one bit per port) - OK=1 or UNINIT=0
 * @ops: pointer to switch-specific operations
 * @lock: lock to serialize operations updates
 * @nextdev: Array of per-port pointers to the next attached device
 */
struct rio_switch {
	struct list_head node;
	u8 *route_table;
	u32 port_ok;
	struct rio_switch_ops *ops;
	spinlock_t lock;
	struct rio_dev *nextdev[];
};

/**
 * struct rio_switch_ops - Per-switch operations
 * @owner: The module owner of this structure
 * @add_entry: Callback for switch-specific route add function
 * @get_entry: Callback for switch-specific route get function
 * @clr_table: Callback for switch-specific clear route table function
 * @set_domain: Callback for switch-specific domain setting function
 * @get_domain: Callback for switch-specific domain get function
 * @em_init: Callback for switch-specific error management init function
 * @em_handle: Callback for switch-specific error management handler function
 *
 * Defines the operations that are necessary to initialize/control
 * a particular RIO switch device.
 */
struct rio_switch_ops {
	struct module *owner;
	int (*add_entry) (struct rio_mport *mport, u16 destid, u8 hopcount,
			  u16 table, u16 route_destid, u8 route_port);
	int (*get_entry) (struct rio_mport *mport, u16 destid, u8 hopcount,
			  u16 table, u16 route_destid, u8 *route_port);
	int (*clr_table) (struct rio_mport *mport, u16 destid, u8 hopcount,
			  u16 table);
	int (*set_domain) (struct rio_mport *mport, u16 destid, u8 hopcount,
			   u8 sw_domain);
	int (*get_domain) (struct