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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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2aaf308b95
This patch removes an artificial RapidIO bus root device and establishes actual device hierarchy by providing reference to real parent devices. It also introduces device class for RapidIO controller devices (on-chip or an eternal bridge, known as "mport"). Existing implementation was sufficient for SoC-based platforms that have a single RapidIO controller. With introduction of devices using multiple RapidIO controllers and PCIe-to-RapidIO bridges the old scheme is very limiting or does not work at all. The implemented changes allow to properly reference platform's local RapidIO mport devices and provide device details needed for upper layers. This change to RapidIO device hierarchy does not break any known existing kernel or user space interfaces. Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Li Yang <leoli@freescale.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com> Cc: Stef van Os <stef.van.os@prodrive-technologies.com> Cc: Jerry Jacobs <jerry.jacobs@prodrive-technologies.com> Cc: Arno Tiemersma <arno.tiemersma@prodrive-technologies.com> Cc: Rob Landley <rob@landley.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
486 lines
16 KiB
C
486 lines
16 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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/**
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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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* @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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* @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 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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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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/**
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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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enum rio_phy_type {
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RIO_PHY_PARALLEL,
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RIO_PHY_SERIAL,
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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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* @sys_size: RapidIO common transport system size
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* @phy_type: RapidIO phy type
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* @phys_efptr: RIO port extended features pointer
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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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*/
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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; /* 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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enum rio_phy_type phy_type; /* RapidIO phy type */
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u32 phys_efptr;
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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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};
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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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struct rio_id_table {
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u16 start; /* logical minimal id */
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u32 max; /* max number of IDs in table */
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spinlock_t lock;
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unsigned long *table;
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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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* @switches: List of switches in this netowrk
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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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* @destid_table: destID allocation table
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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 rio_id_table destid_table; /* destID allocation table */
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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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*/
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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, u32 size, u32 flags);
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void (*unmap_inb)(struct rio_mport *mport, dma_addr_t lstart);
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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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union rio_pw_msg {
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struct {
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u32 comptag; /* Component Tag CSR */
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u32 errdetect; /* Port N Error Detect CSR */
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u32 is_port; /* Implementation specific + PortID */
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u32 ltlerrdet; /* LTL Error Detect CSR */
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u32 padding[12];
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} em;
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u32 raw[RIO_PW_MSG_SIZE/sizeof(u32)];
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};
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#ifdef CONFIG_RAPIDIO_DMA_ENGINE
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/*
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* enum rio_write_type - RIO write transaction types used in DMA transfers
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*
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* Note: RapidIO specification defines write (NWRITE) and
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* write-with-response (NWRITE_R) data transfer operations.
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* Existing DMA controllers that service RapidIO may use one of these operations
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* for entire data transfer or their combination with only the last data packet
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* requires response.
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*/
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enum rio_write_type {
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RDW_DEFAULT, /* default method used by DMA driver */
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RDW_ALL_NWRITE, /* all packets use NWRITE */
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RDW_ALL_NWRITE_R, /* all packets use NWRITE_R */
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RDW_LAST_NWRITE_R, /* last packet uses NWRITE_R, others - NWRITE */
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};
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|
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struct rio_dma_ext {
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u16 destid;
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|
u64 rio_addr; /* low 64-bits of 66-bit RapidIO address */
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|
u8 rio_addr_u; /* upper 2-bits of 66-bit RapidIO address */
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|
enum rio_write_type wr_type; /* preferred RIO write operation type */
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|
};
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|
|
|
struct rio_dma_data {
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|
/* Local data (as scatterlist) */
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|
struct scatterlist *sg; /* I/O scatter list */
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|
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 */
|
|
};
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|
|
|
static inline struct rio_mport *dma_to_mport(struct dma_device *ddev)
|
|
{
|
|
return container_of(ddev, struct rio_mport, dma);
|
|
}
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|
#endif /* CONFIG_RAPIDIO_DMA_ENGINE */
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|
|
|
/**
|
|
* 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_register_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);
|
|
|
|
#endif /* LINUX_RIO_H */
|