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c70555b051
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>
326 lines
10 KiB
C
326 lines
10 KiB
C
/*
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* RapidIO interconnect services
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* (RapidIO Interconnect Specification, http://www.rapidio.org)
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*
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* Copyright 2005 MontaVista Software, Inc.
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* Matt Porter <mporter@kernel.crashing.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#ifndef LINUX_RIO_H
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#define LINUX_RIO_H
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#ifdef __KERNEL__
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#include <linux/types.h>
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#include <linux/ioport.h>
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#include <linux/list.h>
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#include <linux/errno.h>
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#include <linux/device.h>
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#include <linux/rio_regs.h>
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#define RIO_ANY_DESTID 0xff
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#define RIO_NO_HOPCOUNT -1
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#define RIO_INVALID_DESTID 0xffff
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#define RIO_MAX_MPORT_RESOURCES 16
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#define RIO_MAX_DEV_RESOURCES 16
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#define RIO_GLOBAL_TABLE 0xff /* Indicates access of a switch's
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global routing table if it
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has multiple (or per port)
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tables */
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#define RIO_INVALID_ROUTE 0xff /* Indicates that a route table
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entry is invalid (no route
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exists for the device ID) */
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#ifdef CONFIG_RAPIDIO_8_BIT_TRANSPORT
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#define RIO_MAX_ROUTE_ENTRIES (1 << 8)
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#else
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#define RIO_MAX_ROUTE_ENTRIES (1 << 16)
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#endif
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#define RIO_MAX_MBOX 4
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#define RIO_MAX_MSG_SIZE 0x1000
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/*
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* Error values that may be returned by RIO functions.
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*/
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#define RIO_SUCCESSFUL 0x00
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#define RIO_BAD_SIZE 0x81
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/*
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* For RIO devices, the region numbers are assigned this way:
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*
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* 0 RapidIO outbound doorbells
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* 1-15 RapidIO memory regions
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*
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* For RIO master ports, the region number are assigned this way:
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*
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* 0 RapidIO inbound doorbells
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* 1 RapidIO inbound mailboxes
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* 1 RapidIO outbound mailboxes
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*/
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#define RIO_DOORBELL_RESOURCE 0
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#define RIO_INB_MBOX_RESOURCE 1
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#define RIO_OUTB_MBOX_RESOURCE 2
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extern struct bus_type rio_bus_type;
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extern struct list_head rio_devices; /* list of all devices */
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struct rio_mport;
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/**
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* struct rio_dev - RIO device info
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* @global_list: Node in list of all RIO devices
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* @net_list: Node in list of RIO devices in a network
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* @net: Network this device is a part of
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* @did: Device ID
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* @vid: Vendor ID
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* @device_rev: Device revision
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* @asm_did: Assembly device ID
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* @asm_vid: Assembly vendor ID
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* @asm_rev: Assembly revision
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* @efptr: Extended feature pointer
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* @pef: Processing element features
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* @swpinfo: Switch port info
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* @src_ops: Source operation capabilities
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* @dst_ops: Destination operation capabilities
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* @dma_mask: Mask of bits of RIO address this device implements
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* @rswitch: Pointer to &struct rio_switch if valid for this device
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* @driver: Driver claiming this device
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* @dev: Device model device
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* @riores: RIO resources this device owns
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* @destid: Network destination ID
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*/
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struct rio_dev {
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struct list_head global_list; /* node in list of all RIO devices */
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struct list_head net_list; /* node in per net list */
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struct rio_net *net; /* RIO net this device resides in */
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u16 did;
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u16 vid;
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u32 device_rev;
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u16 asm_did;
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u16 asm_vid;
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u16 asm_rev;
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u16 efptr;
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u32 pef;
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u32 swpinfo; /* Only used for switches */
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u32 src_ops;
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u32 dst_ops;
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u64 dma_mask;
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struct rio_switch *rswitch; /* RIO switch info */
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struct rio_driver *driver; /* RIO driver claiming this device */
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struct device dev; /* LDM device structure */
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struct resource riores[RIO_MAX_DEV_RESOURCES];
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u16 destid;
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};
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#define rio_dev_g(n) list_entry(n, struct rio_dev, global_list)
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#define rio_dev_f(n) list_entry(n, struct rio_dev, net_list)
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#define to_rio_dev(n) container_of(n, struct rio_dev, dev)
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/**
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* struct rio_msg - RIO message event
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* @res: Mailbox resource
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* @mcback: Message event callback
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*/
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struct rio_msg {
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struct resource *res;
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void (*mcback) (struct rio_mport * mport, void *dev_id, int mbox, int slot);
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};
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/**
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* struct rio_dbell - RIO doorbell event
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* @node: Node in list of doorbell events
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* @res: Doorbell resource
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* @dinb: Doorbell event callback
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* @dev_id: Device specific pointer to pass on event
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*/
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struct rio_dbell {
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struct list_head node;
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struct resource *res;
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void (*dinb) (struct rio_mport *mport, void *dev_id, u16 src, u16 dst, u16 info);
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void *dev_id;
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};
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/**
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* struct rio_mport - RIO master port info
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* @dbells: List of doorbell events
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* @node: Node in global list of master ports
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* @nnode: Node in network list of master ports
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* @iores: I/O mem resource that this master port interface owns
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* @riores: RIO resources that this master port interfaces owns
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* @inb_msg: RIO inbound message event descriptors
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* @outb_msg: RIO outbound message event descriptors
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* @host_deviceid: Host device ID associated with this master port
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* @ops: configuration space functions
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* @id: Port ID, unique among all ports
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* @index: Port index, unique among all port interfaces of the same type
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* @name: Port name string
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*/
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struct rio_mport {
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struct list_head dbells; /* list of doorbell events */
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struct list_head node; /* node in global list of ports */
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struct list_head nnode; /* node in net list of ports */
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struct resource iores;
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struct resource riores[RIO_MAX_MPORT_RESOURCES];
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struct rio_msg inb_msg[RIO_MAX_MBOX];
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struct rio_msg outb_msg[RIO_MAX_MBOX];
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int host_deviceid; /* Host device ID */
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struct rio_ops *ops; /* maintenance transaction functions */
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unsigned char id; /* port ID, unique among all ports */
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unsigned char index; /* port index, unique among all port
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interfaces of the same type */
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unsigned char name[40];
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};
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/**
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* struct rio_net - RIO network info
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* @node: Node in global list of RIO networks
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* @devices: List of devices in this network
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* @mports: List of master ports accessing this network
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* @hport: Default port for accessing this network
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* @id: RIO network ID
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*/
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struct rio_net {
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struct list_head node; /* node in list of networks */
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struct list_head devices; /* list of devices in this net */
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struct list_head mports; /* list of ports accessing net */
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struct rio_mport *hport; /* primary port for accessing net */
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unsigned char id; /* RIO network ID */
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};
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/**
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* struct rio_switch - RIO switch info
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* @node: Node in global list of switches
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* @switchid: Switch ID that is unique across a network
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* @hopcount: Hopcount to this switch
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* @destid: Associated destid in the path
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* @route_table: Copy of switch routing table
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* @add_entry: Callback for switch-specific route add function
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* @get_entry: Callback for switch-specific route get function
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*/
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struct rio_switch {
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struct list_head node;
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u16 switchid;
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u16 hopcount;
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u16 destid;
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u8 route_table[RIO_MAX_ROUTE_ENTRIES];
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int (*add_entry) (struct rio_mport * mport, u16 destid, u8 hopcount,
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u16 table, u16 route_destid, u8 route_port);
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int (*get_entry) (struct rio_mport * mport, u16 destid, u8 hopcount,
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u16 table, u16 route_destid, u8 * route_port);
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};
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/* Low-level architecture-dependent routines */
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/**
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* struct rio_ops - Low-level RIO configuration space operations
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* @lcread: Callback to perform local (master port) read of config space.
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* @lcwrite: Callback to perform local (master port) write of config space.
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* @cread: Callback to perform network read of config space.
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* @cwrite: Callback to perform network write of config space.
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* @dsend: Callback to send a doorbell message.
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*/
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struct rio_ops {
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int (*lcread) (int index, u32 offset, int len, u32 * data);
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int (*lcwrite) (int index, u32 offset, int len, u32 data);
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int (*cread) (int index, u16 destid, u8 hopcount, u32 offset, int len,
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u32 * data);
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int (*cwrite) (int index, u16 destid, u8 hopcount, u32 offset, int len,
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u32 data);
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int (*dsend) (int index, u16 destid, u16 data);
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};
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#define RIO_RESOURCE_MEM 0x00000100
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#define RIO_RESOURCE_DOORBELL 0x00000200
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#define RIO_RESOURCE_MAILBOX 0x00000400
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#define RIO_RESOURCE_CACHEABLE 0x00010000
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#define RIO_RESOURCE_PCI 0x00020000
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#define RIO_RESOURCE_BUSY 0x80000000
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/**
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* struct rio_driver - RIO driver info
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* @node: Node in list of drivers
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* @name: RIO driver name
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* @id_table: RIO device ids to be associated with this driver
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* @probe: RIO device inserted
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* @remove: RIO device removed
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* @suspend: RIO device suspended
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* @resume: RIO device awakened
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* @enable_wake: RIO device enable wake event
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* @driver: LDM driver struct
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*
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* Provides info on a RIO device driver for insertion/removal and
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* power management purposes.
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*/
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struct rio_driver {
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struct list_head node;
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char *name;
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const struct rio_device_id *id_table;
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int (*probe) (struct rio_dev * dev, const struct rio_device_id * id);
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void (*remove) (struct rio_dev * dev);
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int (*suspend) (struct rio_dev * dev, u32 state);
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int (*resume) (struct rio_dev * dev);
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int (*enable_wake) (struct rio_dev * dev, u32 state, int enable);
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struct device_driver driver;
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};
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#define to_rio_driver(drv) container_of(drv,struct rio_driver, driver)
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/**
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* struct rio_device_id - RIO device identifier
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* @did: RIO device ID
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* @vid: RIO vendor ID
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* @asm_did: RIO assembly device ID
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* @asm_vid: RIO assembly vendor ID
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*
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* Identifies a RIO device based on both the device/vendor IDs and
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* the assembly device/vendor IDs.
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*/
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struct rio_device_id {
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u16 did, vid;
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u16 asm_did, asm_vid;
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};
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/**
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* struct rio_route_ops - Per-switch route operations
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* @vid: RIO vendor ID
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* @did: RIO device ID
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* @add_hook: Callback that adds a route entry
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* @get_hook: Callback that gets a route entry
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*
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* Defines the operations that are necessary to manipulate the route
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* tables for a particular RIO switch device.
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*/
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struct rio_route_ops {
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u16 vid, did;
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int (*add_hook) (struct rio_mport * mport, u16 destid, u8 hopcount,
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u16 table, u16 route_destid, u8 route_port);
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int (*get_hook) (struct rio_mport * mport, u16 destid, u8 hopcount,
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u16 table, u16 route_destid, u8 * route_port);
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};
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/* Architecture and hardware-specific functions */
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extern int rio_init_mports(void);
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extern void rio_register_mport(struct rio_mport *);
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extern int rio_hw_add_outb_message(struct rio_mport *, struct rio_dev *, int,
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void *, size_t);
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extern int rio_hw_add_inb_buffer(struct rio_mport *, int, void *);
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extern void *rio_hw_get_inb_message(struct rio_mport *, int);
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extern int rio_open_inb_mbox(struct rio_mport *, void *, int, int);
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extern void rio_close_inb_mbox(struct rio_mport *, int);
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extern int rio_open_outb_mbox(struct rio_mport *, void *, int, int);
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extern void rio_close_outb_mbox(struct rio_mport *, int);
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#endif /* __KERNEL__ */
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#endif /* LINUX_RIO_H */
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