563 lines
19 KiB
C
563 lines
19 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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#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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#include <linux/mod_devicetable.h>
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#ifdef CONFIG_RAPIDIO_DMA_ENGINE
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#include <linux/dmaengine.h>
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#endif
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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_MPORTS 8
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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_MAX_MPORT_NAME 40
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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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#define RIO_MAX_ROUTE_ENTRIES(size) (size ? (1 << 16) : (1 << 8))
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#define RIO_ANY_DESTID(size) (size ? 0xffff : 0xff)
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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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* 2 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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#define RIO_PW_MSG_SIZE 64
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/*
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* A component tag value (stored in the component tag CSR) is used as device's
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* unique identifier assigned during enumeration. Besides being used for
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* identifying switches (which do not have device ID register), it also is used
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* by error management notification and therefore has to be assigned
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* to endpoints as well.
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*/
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#define RIO_CTAG_RESRVD 0xfffe0000 /* Reserved */
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#define RIO_CTAG_UDEVID 0x0001ffff /* Unique device identifier */
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extern struct bus_type rio_bus_type;
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extern struct class rio_mport_class;
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struct rio_mport;
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struct rio_dev;
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union rio_pw_msg;
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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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* @route_table: Copy of switch routing table
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* @port_ok: Status of each port (one bit per port) - OK=1 or UNINIT=0
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* @ops: pointer to switch-specific operations
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* @lock: lock to serialize operations updates
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* @nextdev: Array of per-port pointers to the next attached device
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*/
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struct rio_switch {
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struct list_head node;
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u8 *route_table;
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u32 port_ok;
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struct rio_switch_ops *ops;
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spinlock_t lock;
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struct rio_dev *nextdev[0];
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};
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/**
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* struct rio_switch_ops - Per-switch operations
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* @owner: The module owner of this structure
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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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* @clr_table: Callback for switch-specific clear route table function
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* @set_domain: Callback for switch-specific domain setting function
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* @get_domain: Callback for switch-specific domain get function
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* @em_init: Callback for switch-specific error management init function
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* @em_handle: Callback for switch-specific error management handler function
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*
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* Defines the operations that are necessary to initialize/control
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* a particular RIO switch device.
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*/
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struct rio_switch_ops {
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struct module *owner;
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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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int (*clr_table) (struct rio_mport *mport, u16 destid, u8 hopcount,
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u16 table);
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int (*set_domain) (struct rio_mport *mport, u16 destid, u8 hopcount,
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u8 sw_domain);
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int (*get_domain) (struct rio_mport *mport, u16 destid, u8 hopcount,
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u8 *sw_domain);
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int (*em_init) (struct rio_dev *dev);
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int (*em_handle) (struct rio_dev *dev, u8 swport);
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};
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enum rio_device_state {
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RIO_DEVICE_INITIALIZING,
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RIO_DEVICE_RUNNING,
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RIO_DEVICE_GONE,
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RIO_DEVICE_SHUTDOWN,
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};
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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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* @do_enum: Enumeration flag
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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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* @comp_tag: RIO component tag
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* @phys_efptr: RIO device extended features pointer
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* @phys_rmap: LP-Serial Register Map Type (1 or 2)
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* @em_efptr: RIO Error Management features pointer
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* @dma_mask: Mask of bits of RIO address this device implements
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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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* @pwcback: port-write callback function for this device
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* @destid: Network destination ID (or associated destid for switch)
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* @hopcount: Hopcount to this device
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* @prev: Previous RIO device connected to the current one
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* @state: device state
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* @rswitch: struct rio_switch (if valid for this device)
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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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bool do_enum;
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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;
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u32 src_ops;
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u32 dst_ops;
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u32 comp_tag;
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u32 phys_efptr;
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u32 phys_rmap;
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u32 em_efptr;
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u64 dma_mask;
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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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int (*pwcback) (struct rio_dev *rdev, union rio_pw_msg *msg, int step);
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u16 destid;
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u8 hopcount;
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struct rio_dev *prev;
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atomic_t state;
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struct rio_switch rswitch[0]; /* RIO switch info */
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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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#define sw_to_rio_dev(n) container_of(n, struct rio_dev, rswitch[0])
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#define to_rio_mport(n) container_of(n, struct rio_mport, dev)
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#define to_rio_net(n) container_of(n, struct rio_net, 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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* @pwrites: List of portwrite 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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* @net: RIO net this mport is attached to
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* @lock: lock to synchronize lists manipulations
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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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* @sys_size: RapidIO common transport system size
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* @phys_efptr: RIO port extended features pointer
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* @phys_rmap: LP-Serial EFB Register Mapping type (1 or 2).
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* @name: Port name string
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* @dev: device structure associated with an mport
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* @priv: Master port private data
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* @dma: DMA device associated with mport
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* @nscan: RapidIO network enumeration/discovery operations
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* @state: mport device state
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* @pwe_refcnt: port-write enable ref counter to track enable/disable requests
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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 pwrites; /* list of portwrite 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 rio_net *net; /* RIO net this mport is attached to */
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struct mutex lock;
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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; /* low-level architecture-dependent routines */
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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 int sys_size; /* RapidIO common transport system size.
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* 0 - Small size. 256 devices.
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* 1 - Large size, 65536 devices.
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*/
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u32 phys_efptr;
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u32 phys_rmap;
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unsigned char name[RIO_MAX_MPORT_NAME];
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struct device dev;
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void *priv; /* Master port private data */
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#ifdef CONFIG_RAPIDIO_DMA_ENGINE
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struct dma_device dma;
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#endif
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struct rio_scan *nscan;
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atomic_t state;
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unsigned int pwe_refcnt;
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};
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static inline int rio_mport_is_running(struct rio_mport *mport)
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{
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return atomic_read(&mport->state) == RIO_DEVICE_RUNNING;
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}
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/*
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* Enumeration/discovery control flags
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*/
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#define RIO_SCAN_ENUM_NO_WAIT 0x00000001 /* Do not wait for enum completed */
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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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* @switches: List of switches 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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* @dev: Device object
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* @enum_data: private data specific to a network enumerator
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* @release: enumerator-specific release callback
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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 switches; /* list of switches 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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struct device dev;
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void *enum_data; /* private data for enumerator of the network */
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void (*release)(struct rio_net *net);
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};
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enum rio_link_speed {
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RIO_LINK_DOWN = 0, /* SRIO Link not initialized */
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RIO_LINK_125 = 1, /* 1.25 GBaud */
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RIO_LINK_250 = 2, /* 2.5 GBaud */
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RIO_LINK_312 = 3, /* 3.125 GBaud */
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RIO_LINK_500 = 4, /* 5.0 GBaud */
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RIO_LINK_625 = 5 /* 6.25 GBaud */
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};
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enum rio_link_width {
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RIO_LINK_1X = 0,
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RIO_LINK_1XR = 1,
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RIO_LINK_2X = 3,
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RIO_LINK_4X = 2,
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RIO_LINK_8X = 4,
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RIO_LINK_16X = 5
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};
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enum rio_mport_flags {
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RIO_MPORT_DMA = (1 << 0), /* supports DMA data transfers */
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RIO_MPORT_DMA_SG = (1 << 1), /* DMA supports HW SG mode */
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RIO_MPORT_IBSG = (1 << 2), /* inbound mapping supports SG */
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};
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/**
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* struct rio_mport_attr - RIO mport device attributes
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* @flags: mport device capability flags
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* @link_speed: SRIO link speed value (as defined by RapidIO specification)
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* @link_width: SRIO link width value (as defined by RapidIO specification)
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* @dma_max_sge: number of SG list entries that can be handled by DMA channel(s)
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* @dma_max_size: max number of bytes in single DMA transfer (SG entry)
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* @dma_align: alignment shift for DMA operations (as for other DMA operations)
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*/
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struct rio_mport_attr {
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int flags;
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int link_speed;
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int link_width;
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/* DMA capability info: valid only if RIO_MPORT_DMA flag is set */
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int dma_max_sge;
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int dma_max_size;
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int dma_align;
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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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* @pwenable: Callback to enable/disable port-write message handling.
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* @open_outb_mbox: Callback to initialize outbound mailbox.
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* @close_outb_mbox: Callback to shut down outbound mailbox.
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* @open_inb_mbox: Callback to initialize inbound mailbox.
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* @close_inb_mbox: Callback to shut down inbound mailbox.
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* @add_outb_message: Callback to add a message to an outbound mailbox queue.
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* @add_inb_buffer: Callback to add a buffer to an inbound mailbox queue.
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* @get_inb_message: Callback to get a message from an inbound mailbox queue.
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* @map_inb: Callback to map RapidIO address region into local memory space.
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* @unmap_inb: Callback to unmap RapidIO address region mapped with map_inb().
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* @query_mport: Callback to query mport device attributes.
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* @map_outb: Callback to map outbound address region into local memory space.
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* @unmap_outb: Callback to unmap outbound RapidIO address region.
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*/
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struct rio_ops {
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int (*lcread) (struct rio_mport *mport, int index, u32 offset, int len,
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u32 *data);
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int (*lcwrite) (struct rio_mport *mport, int index, u32 offset, int len,
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u32 data);
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int (*cread) (struct rio_mport *mport, int index, u16 destid,
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u8 hopcount, u32 offset, int len, u32 *data);
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int (*cwrite) (struct rio_mport *mport, int index, u16 destid,
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u8 hopcount, u32 offset, int len, u32 data);
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int (*dsend) (struct rio_mport *mport, int index, u16 destid, u16 data);
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int (*pwenable) (struct rio_mport *mport, int enable);
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int (*open_outb_mbox)(struct rio_mport *mport, void *dev_id,
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int mbox, int entries);
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void (*close_outb_mbox)(struct rio_mport *mport, int mbox);
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int (*open_inb_mbox)(struct rio_mport *mport, void *dev_id,
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int mbox, int entries);
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void (*close_inb_mbox)(struct rio_mport *mport, int mbox);
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int (*add_outb_message)(struct rio_mport *mport, struct rio_dev *rdev,
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int mbox, void *buffer, size_t len);
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int (*add_inb_buffer)(struct rio_mport *mport, int mbox, void *buf);
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void *(*get_inb_message)(struct rio_mport *mport, int mbox);
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int (*map_inb)(struct rio_mport *mport, dma_addr_t lstart,
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u64 rstart, u64 size, u32 flags);
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void (*unmap_inb)(struct rio_mport *mport, dma_addr_t lstart);
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int (*query_mport)(struct rio_mport *mport,
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struct rio_mport_attr *attr);
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int (*map_outb)(struct rio_mport *mport, u16 destid, u64 rstart,
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u32 size, u32 flags, dma_addr_t *laddr);
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void (*unmap_outb)(struct rio_mport *mport, u16 destid, u64 rstart);
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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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|
* @shutdown: shutdown notification callback
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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
|
|
* 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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|
void (*shutdown)(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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|
|
|
union rio_pw_msg {
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|
struct {
|
|
u32 comptag; /* Component Tag CSR */
|
|
u32 errdetect; /* Port N Error Detect CSR */
|
|
u32 is_port; /* Implementation specific + PortID */
|
|
u32 ltlerrdet; /* LTL Error Detect CSR */
|
|
u32 padding[12];
|
|
} em;
|
|
u32 raw[RIO_PW_MSG_SIZE/sizeof(u32)];
|
|
};
|
|
|
|
#ifdef CONFIG_RAPIDIO_DMA_ENGINE
|
|
|
|
/*
|
|
* enum rio_write_type - RIO write transaction types used in DMA transfers
|
|
*
|
|
* Note: RapidIO specification defines write (NWRITE) and
|
|
* write-with-response (NWRITE_R) data transfer operations.
|
|
* Existing DMA controllers that service RapidIO may use one of these operations
|
|
* for entire data transfer or their combination with only the last data packet
|
|
* requires response.
|
|
*/
|
|
enum rio_write_type {
|
|
RDW_DEFAULT, /* default method used by DMA driver */
|
|
RDW_ALL_NWRITE, /* all packets use NWRITE */
|
|
RDW_ALL_NWRITE_R, /* all packets use NWRITE_R */
|
|
RDW_LAST_NWRITE_R, /* last packet uses NWRITE_R, others - NWRITE */
|
|
};
|
|
|
|
struct rio_dma_ext {
|
|
u16 destid;
|
|
u64 rio_addr; /* low 64-bits of 66-bit RapidIO address */
|
|
u8 rio_addr_u; /* upper 2-bits of 66-bit RapidIO address */
|
|
enum rio_write_type wr_type; /* preferred RIO write operation type */
|
|
};
|
|
|
|
struct rio_dma_data {
|
|
/* Local data (as scatterlist) */
|
|
struct scatterlist *sg; /* I/O scatter list */
|
|
unsigned int sg_len; /* size of scatter list */
|
|
/* Remote device address (flat buffer) */
|
|
u64 rio_addr; /* low 64-bits of 66-bit RapidIO address */
|
|
u8 rio_addr_u; /* upper 2-bits of 66-bit RapidIO address */
|
|
enum rio_write_type wr_type; /* preferred RIO write operation type */
|
|
};
|
|
|
|
static inline struct rio_mport *dma_to_mport(struct dma_device *ddev)
|
|
{
|
|
return container_of(ddev, struct rio_mport, dma);
|
|
}
|
|
#endif /* CONFIG_RAPIDIO_DMA_ENGINE */
|
|
|
|
/**
|
|
* struct rio_scan - RIO enumeration and discovery operations
|
|
* @owner: The module owner of this structure
|
|
* @enumerate: Callback to perform RapidIO fabric enumeration.
|
|
* @discover: Callback to perform RapidIO fabric discovery.
|
|
*/
|
|
struct rio_scan {
|
|
struct module *owner;
|
|
int (*enumerate)(struct rio_mport *mport, u32 flags);
|
|
int (*discover)(struct rio_mport *mport, u32 flags);
|
|
};
|
|
|
|
/**
|
|
* struct rio_scan_node - list node to register RapidIO enumeration and
|
|
* discovery methods with RapidIO core.
|
|
* @mport_id: ID of an mport (net) serviced by this enumerator
|
|
* @node: node in global list of registered enumerators
|
|
* @ops: RIO enumeration and discovery operations
|
|
*/
|
|
struct rio_scan_node {
|
|
int mport_id;
|
|
struct list_head node;
|
|
struct rio_scan *ops;
|
|
};
|
|
|
|
/* Architecture and hardware-specific functions */
|
|
extern int rio_mport_initialize(struct rio_mport *);
|
|
extern int rio_register_mport(struct rio_mport *);
|
|
extern int rio_unregister_mport(struct rio_mport *);
|
|
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);
|
|
extern int rio_query_mport(struct rio_mport *port,
|
|
struct rio_mport_attr *mport_attr);
|
|
|
|
#endif /* LINUX_RIO_H */
|