[PATCH] RapidIO support: core includes

Add RapidIO core include files.

The core code implements enumeration/discovery, management of
devices/resources, and interfaces for RIO drivers.

Signed-off-by: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 321 insertions, 0 deletions

diff --git a/include/linux/rio.h b/include/linux/rio.h
new file mode 100644
index 00000000000..930bbb7c380
--- /dev/null
+++ b/include/linux/rio.h
@@ -0,0 +1,321 @@
+/*
+ * RapidIO interconnect services
+ * (RapidIO Interconnect Specification, http://www.rapidio.org)
+ *
+ * Copyright 2005 MontaVista Software, Inc.
+ * Matt Porter <mporter@kernel.crashing.org>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#ifndef LINUX_RIO_H
+#define LINUX_RIO_H
+
+#ifdef __KERNEL__
+
+#include <linux/types.h>
+#include <linux/config.h>
+#include <linux/ioport.h>
+#include <linux/list.h>
+#include <linux/errno.h>
+#include <linux/device.h>
+#include <linux/rio_regs.h>
+
+#define RIO_ANY_DESTID		0xff
+#define RIO_NO_HOPCOUNT		-1
+
+#define RIO_MAX_MPORT_RESOURCES	16
+#define RIO_MAX_DEV_RESOURCES	16
+
+#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) */
+
+#ifdef CONFIG_RAPIDIO_8_BIT_TRANSPORT
+#define RIO_MAX_ROUTE_ENTRIES	(1 << 8)
+#else
+#define RIO_MAX_ROUTE_ENTRIES	(1 << 16)
+#endif
+
+#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
+ *	1	RapidIO outbound mailboxes
+ */
+#define RIO_DOORBELL_RESOURCE	0
+#define RIO_INB_MBOX_RESOURCE	1
+#define RIO_OUTB_MBOX_RESOURCE	2
+
+extern struct bus_type rio_bus_type;
+extern struct list_head rio_devices;	/* list of all devices */
+
+struct rio_mport;
+
+/**
+ * struct rio_dev - RIO device info
+ * @global_list: Node in list of all RIO devices
+ * @net_list: Node in list of RIO devices in a network
+ * @net: Network this device is a part of
+ * @did: Device ID
+ * @vid: Vendor ID
+ * @device_rev: Device revision
+ * @asm_did: Assembly device ID
+ * @asm_vid: Assembly vendor ID
+ * @asm_rev: Assembly revision
+ * @efptr: Extended feature pointer
+ * @pef: Processing element features
+ * @swpinfo: Switch port info
+ * @src_ops: Source operation capabilities
+ * @dst_ops: Destination operation capabilities
+ * @rswitch: Pointer to &struct rio_switch if valid for this device
+ * @driver: Driver claiming this device
+ * @dev: Device model device
+ * @riores: RIO resources this device owns
+ * @destid: Network destination ID
+ */
+struct rio_dev {
+	struct list_head global_list;	/* node in list of all RIO devices */
+	struct list_head net_list;	/* node in per net list */
+	struct rio_net *net;	/* RIO net this device resides in */
+	u16 did;
+	u16 vid;
+	u32 device_rev;
+	u16 asm_did;
+	u16 asm_vid;
+	u16 asm_rev;
+	u16 efptr;
+	u32 pef;
+	u32 swpinfo;		/* Only used for switches */
+	u32 src_ops;
+	u32 dst_ops;
+	struct rio_switch *rswitch;	/* RIO switch info */
+	struct rio_driver *driver;	/* RIO driver claiming this device */
+	struct device dev;	/* LDM device structure */
+	struct resource riores[RIO_MAX_DEV_RESOURCES];
+	u16 destid;
+};
+
+#define rio_dev_g(n) list_entry(n, struct rio_dev, global_list)
+#define rio_dev_f(n) list_entry(n, struct rio_dev, net_list)
+#define	to_rio_dev(n) container_of(n, struct rio_dev, dev)
+
+/**
+ * struct rio_msg - RIO message event
+ * @res: Mailbox resource
+ * @mcback: Message event callback
+ */
+struct rio_msg {
+	struct resource *res;
+	void (*mcback) (struct rio_mport * mport, int mbox, int slot);
+};
+
+/**
+ * struct rio_dbell - RIO doorbell event
+ * @node: Node in list of doorbell events
+ * @res: Doorbell resource
+ * @dinb: Doorbell event callback
+ */
+struct rio_dbell {
+	struct list_head node;
+	struct resource *res;
+	void (*dinb) (struct rio_mport * mport, u16 src, u16 dst, u16 info);
+};
+
+/**
+ * struct rio_mport - RIO master port info
+ * @dbells: List of doorbell events
+ * @node: Node in global list of master ports
+ * @nnode: Node in network list of master ports
+ * @iores: I/O mem resource that this master port interface owns
+ * @riores: RIO resources that this master port interfaces owns
+ * @inb_msg: RIO inbound message event descriptors
+ * @outb_msg: RIO outbound message event descriptors
+ * @host_deviceid: Host device ID associated with this master port
+ * @ops: configuration space functions
+ * @id: Port ID, unique among all ports
+ * @index: Port index, unique among all port interfaces of the same type
+ * @name: Port name string
+ */
+struct rio_mport {
+	struct list_head dbells;	/* list of doorbell events */
+	struct list_head node;	/* node in global list of ports */
+	struct list_head nnode;	/* node in net list of ports */
+	struct resource iores;
+	struct resource riores[RIO_MAX_MPORT_RESOURCES];
+	struct rio_msg inb_msg[RIO_MAX_MBOX];
+	struct rio_msg outb_msg[RIO_MAX_MBOX];
+	int host_deviceid;	/* Host device ID */
+	struct rio_ops *ops;	/* maintenance transaction functions */
+	unsigned char id;	/* port ID, unique among all ports */
+	unsigned char index;	/* port index, unique among all port
+				   interfaces of the same type */
+	unsigned char name[40];
+};
+
+/**
+ * struct rio_net - RIO network info
+ * @node: Node in global list of RIO networks
+ * @devices: List of devices in this network
+ * @mports: List of master ports accessing this network
+ * @hport: Default port for accessing this network
+ * @id: RIO network ID
+ */
+struct rio_net {
+	struct list_head node;	/* node in list of networks */
+	struct list_head devices;	/* list of devices in this net */
+	struct list_head mports;	/* list of ports accessing net */
+	struct rio_mport *hport;	/* primary port for accessing net */
+	unsigned char id;	/* RIO network ID */
+};
+
+/**
+ * struct rio_switch - RIO switch info
+ * @node: Node in global list of switches
+ * @switchid: Switch ID that is unique across a network
+ * @hopcount: Hopcount to this switch
+ * @destid: Associated destid in the path
+ * @route_table: Copy of switch routing table
+ * @add_entry: Callback for switch-specific route add function
+ * @get_entry: Callback for switch-specific route get function
+ */
+struct rio_switch {
+	struct list_head node;
+	u16 switchid;
+	u16 hopcount;
+	u16 destid;
+	u8 route_table[RIO_MAX_ROUTE_ENTRIES];
+	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);
+};
+
+/* Low-level architecture-dependent routines */
+
+/**
+ * struct rio_ops - Low-level RIO configuration space operations
+ * @lcread: Callback to perform local (master port) read of config space.
+ * @lcwrite: Callback to perform local (master port) write of config space.
+ * @cread: Callback to perform network read of config space.
+ * @cwrite: Callback to perform network write of config space.
+ * @dsend: Callback to send a doorbell message.
+ */
+struct rio_ops {
+	int (*lcread) (int index, u32 offset, int len, u32 * data);
+	int (*lcwrite) (int index, u32 offset, int len, u32 data);
+	int (*cread) (int index, u16 destid, u8 hopcount, u32 offset, int len,
+		      u32 * data);
+	int (*cwrite) (int index, u16 destid, u8 hopcount, u32 offset, int len,
+		       u32 data);
+	int (*dsend) (int index, u16 destid, u16 data);
+};
+
+#define RIO_RESOURCE_MEM	0x00000100
+#define RIO_RESOURCE_DOORBELL	0x00000200
+#define RIO_RESOURCE_MAILBOX	0x00000400
+
+#define RIO_RESOURCE_CACHEABLE	0x00010000
+#define RIO_RESOURCE_PCI	0x00020000
+
+#define RIO_RESOURCE_BUSY	0x80000000
+
+/**
+ * struct rio_driver - RIO driver info
+ * @node: Node in list of drivers
+ * @name: RIO driver name
+ * @id_table: RIO device ids to be associated with this driver
+ * @probe: RIO device inserted
+ * @remove: RIO device removed
+ * @suspend: RIO device suspended
+ * @resume: RIO device awakened
+ * @enable_wake: RIO device enable wake event
+ * @driver: LDM driver struct
+ *
+ * Provides info on a RIO device driver for insertion/removal and
+ * power management purposes.
+ */
+struct rio_driver {
+	struct list_head node;
+	char *name;
+	const struct rio_device_id *id_table;
+	int (*probe) (struct rio_dev * dev, const struct rio_device_id * id);
+	void (*remove) (struct rio_dev * dev);
+	int (*suspend) (struct rio_dev * dev, u32 state);
+	int (*resume) (struct rio_dev * dev);
+	int (*enable_wake) (struct rio_dev * dev, u32 state, int enable);
+	struct device_driver driver;
+};
+
+#define	to_rio_driver(drv) container_of(drv,struct rio_driver, driver)
+
+/**
+ * struct rio_device_id - RIO device identifier
+ * @did: RIO device ID
+ * @vid: RIO vendor ID
+ * @asm_did: RIO assembly device ID
+ * @asm_vid: RIO assembly vendor ID
+ *
+ * Identifies a RIO device based on both the device/vendor IDs and
+ * the assembly device/vendor IDs.
+ */
+struct rio_device_id {
+	u16 did, vid;
+	u16 asm_did, asm_vid;
+};
+
+/**
+ * struct rio_route_ops - Per-switch route operations
+ * @vid: RIO vendor ID
+ * @did: RIO device ID
+ * @add_hook: Callback that adds a route entry
+ * @get_hook: Callback that gets a route entry
+ *
+ * Defines the operations that are necessary to manipulate the route
+ * tables for a particular RIO switch device.
+ */
+struct rio_route_ops {
+	u16 vid, did;
+	int (*add_hook) (struct rio_mport * mport, u16 destid, u8 hopcount,
+			 u16 table, u16 route_destid, u8 route_port);
+	int (*get_hook) (struct rio_mport * mport, u16 destid, u8 hopcount,
+			 u16 table, u16 route_destid, u8 * route_port);
+};
+
+/* Architecture and hardware-specific functions */
+extern int rio_init_mports(void);
+extern void rio_register_mport(struct rio_mport *);
+extern int rio_hw_add_outb_message(struct rio_mport *, struct rio_dev *, int,
+				   void *, size_t);
+extern int rio_hw_add_inb_buffer(struct rio_mport *, int, void *);
+extern void *rio_hw_get_inb_message(struct rio_mport *, int);
+extern int rio_open_inb_mbox(struct rio_mport *, int, int);
+extern void rio_close_inb_mbox(struct rio_mport *, int);
+extern int rio_open_outb_mbox(struct rio_mport *, int, int);
+extern void rio_close_outb_mbox(struct rio_mport *, int);
+
+#endif				/* __KERNEL__ */
+#endif				/* LINUX_RIO_H */