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linux-stable/include/linux/rio.h
Alexandre Bounine c70555b051 [PATCH] rapidio: fix multi-switch enumeration 
This patch contains two fixes for RapisIO enumeration logic:

1. Fix enumeration in configurations with multiple switches. The patch adds:

   a. Enumeration of an empty switch.  Empty switch is a switch that
      does not have any endpoint devices attached to it (except host device
      or previous switch in a chain).  New code assigns a phony destination
      ID associated with the switch and sets up corresponding routes.

   b. Adds a second pass to the enumeration to setup routes to
      devices discovered after switch was scanned.

2. Fix enumeration failure when riohdid parameter has non-zero value.
   Current version fails to setup response path to the host when it has
   destination ID other that 0.

Signed-off-by: Alexandre Bounine <alexandreb@tundra.com>
Acked-by: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-11 11:18:07 -08:00

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/*
* 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/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_INVALID_DESTID 0xffff
#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
* @dma_mask: Mask of bits of RIO address this device implements
* @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;
u64 dma_mask;
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, void *dev_id, int mbox, int slot);
};
/**
* struct rio_dbell - RIO doorbell event
* @node: Node in list of doorbell events
* @res: Doorbell resource
* @dinb: Doorbell event callback
* @dev_id: Device specific pointer to pass on event
*/
struct rio_dbell {
struct list_head node;
struct resource *res;
void (*dinb) (struct rio_mport *mport, void *dev_id, u16 src, u16 dst, u16 info);
void *dev_id;
};
/**
* 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 *, void *, int, int);
extern void rio_close_inb_mbox(struct rio_mport *, int);
extern int rio_open_outb_mbox(struct rio_mport *, void *, int, int);
extern void rio_close_outb_mbox(struct rio_mport *, int);
#endif /* __KERNEL__ */
#endif /* LINUX_RIO_H */
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