2005-11-07 02:00:15 -07:00
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/*
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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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#include <linux/config.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/rio.h>
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#include <linux/rio_drv.h>
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#include <linux/rio_ids.h>
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#include <linux/rio_regs.h>
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#include <linux/module.h>
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#include <linux/spinlock.h>
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#include "rio.h"
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static LIST_HEAD(rio_mports);
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/**
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* rio_local_get_device_id - Get the base/extended device id for a port
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* @port: RIO master port from which to get the deviceid
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*
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* Reads the base/extended device id from the local device
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* implementing the master port. Returns the 8/16-bit device
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* id.
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*/
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u16 rio_local_get_device_id(struct rio_mport *port)
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{
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u32 result;
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rio_local_read_config_32(port, RIO_DID_CSR, &result);
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return (RIO_GET_DID(result));
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}
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/**
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* rio_request_inb_mbox - request inbound mailbox service
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* @mport: RIO master port from which to allocate the mailbox resource
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2005-11-07 02:00:20 -07:00
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* @dev_id: Device specific pointer to pass on event
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2005-11-07 02:00:15 -07:00
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* @mbox: Mailbox number to claim
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* @entries: Number of entries in inbound mailbox queue
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* @minb: Callback to execute when inbound message is received
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*
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* Requests ownership of an inbound mailbox resource and binds
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* a callback function to the resource. Returns %0 on success.
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*/
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int rio_request_inb_mbox(struct rio_mport *mport,
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2005-11-07 02:00:20 -07:00
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void *dev_id,
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2005-11-07 02:00:15 -07:00
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int mbox,
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int entries,
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2005-11-07 02:00:20 -07:00
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void (*minb) (struct rio_mport * mport, void *dev_id, int mbox,
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2005-11-07 02:00:15 -07:00
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int slot))
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{
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int rc = 0;
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struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
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if (res) {
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rio_init_mbox_res(res, mbox, mbox);
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/* Make sure this mailbox isn't in use */
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if ((rc =
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request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE],
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res)) < 0) {
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kfree(res);
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goto out;
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}
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mport->inb_msg[mbox].res = res;
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/* Hook the inbound message callback */
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mport->inb_msg[mbox].mcback = minb;
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2005-11-07 02:00:20 -07:00
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rc = rio_open_inb_mbox(mport, dev_id, mbox, entries);
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2005-11-07 02:00:15 -07:00
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} else
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rc = -ENOMEM;
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out:
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return rc;
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}
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/**
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* rio_release_inb_mbox - release inbound mailbox message service
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* @mport: RIO master port from which to release the mailbox resource
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* @mbox: Mailbox number to release
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*
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* Releases ownership of an inbound mailbox resource. Returns 0
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* if the request has been satisfied.
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*/
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int rio_release_inb_mbox(struct rio_mport *mport, int mbox)
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{
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rio_close_inb_mbox(mport, mbox);
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/* Release the mailbox resource */
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return release_resource(mport->inb_msg[mbox].res);
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}
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/**
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* rio_request_outb_mbox - request outbound mailbox service
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* @mport: RIO master port from which to allocate the mailbox resource
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2005-11-07 02:00:20 -07:00
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* @dev_id: Device specific pointer to pass on event
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2005-11-07 02:00:15 -07:00
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* @mbox: Mailbox number to claim
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* @entries: Number of entries in outbound mailbox queue
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* @moutb: Callback to execute when outbound message is sent
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*
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* Requests ownership of an outbound mailbox resource and binds
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* a callback function to the resource. Returns 0 on success.
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*/
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int rio_request_outb_mbox(struct rio_mport *mport,
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2005-11-07 02:00:20 -07:00
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void *dev_id,
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2005-11-07 02:00:15 -07:00
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int mbox,
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int entries,
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2005-11-07 02:00:20 -07:00
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void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot))
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2005-11-07 02:00:15 -07:00
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{
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int rc = 0;
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struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
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if (res) {
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rio_init_mbox_res(res, mbox, mbox);
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/* Make sure this outbound mailbox isn't in use */
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if ((rc =
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request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE],
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res)) < 0) {
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kfree(res);
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goto out;
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}
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mport->outb_msg[mbox].res = res;
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/* Hook the inbound message callback */
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mport->outb_msg[mbox].mcback = moutb;
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2005-11-07 02:00:20 -07:00
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rc = rio_open_outb_mbox(mport, dev_id, mbox, entries);
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2005-11-07 02:00:15 -07:00
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} else
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rc = -ENOMEM;
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out:
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return rc;
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}
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/**
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* rio_release_outb_mbox - release outbound mailbox message service
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* @mport: RIO master port from which to release the mailbox resource
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* @mbox: Mailbox number to release
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*
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* Releases ownership of an inbound mailbox resource. Returns 0
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* if the request has been satisfied.
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*/
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int rio_release_outb_mbox(struct rio_mport *mport, int mbox)
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{
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rio_close_outb_mbox(mport, mbox);
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/* Release the mailbox resource */
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return release_resource(mport->outb_msg[mbox].res);
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}
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/**
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* rio_setup_inb_dbell - bind inbound doorbell callback
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* @mport: RIO master port to bind the doorbell callback
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2005-11-07 02:00:20 -07:00
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* @dev_id: Device specific pointer to pass on event
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2005-11-07 02:00:15 -07:00
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* @res: Doorbell message resource
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* @dinb: Callback to execute when doorbell is received
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*
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* Adds a doorbell resource/callback pair into a port's
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* doorbell event list. Returns 0 if the request has been
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* satisfied.
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*/
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static int
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2005-11-07 02:00:20 -07:00
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rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res,
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void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst,
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2005-11-07 02:00:15 -07:00
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u16 info))
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{
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int rc = 0;
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struct rio_dbell *dbell;
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if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) {
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rc = -ENOMEM;
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goto out;
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}
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dbell->res = res;
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dbell->dinb = dinb;
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2005-11-07 02:00:20 -07:00
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dbell->dev_id = dev_id;
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2005-11-07 02:00:15 -07:00
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list_add_tail(&dbell->node, &mport->dbells);
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out:
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return rc;
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}
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/**
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* rio_request_inb_dbell - request inbound doorbell message service
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* @mport: RIO master port from which to allocate the doorbell resource
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2005-11-07 02:00:20 -07:00
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* @dev_id: Device specific pointer to pass on event
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2005-11-07 02:00:15 -07:00
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* @start: Doorbell info range start
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* @end: Doorbell info range end
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* @dinb: Callback to execute when doorbell is received
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*
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* Requests ownership of an inbound doorbell resource and binds
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* a callback function to the resource. Returns 0 if the request
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* has been satisfied.
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*/
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int rio_request_inb_dbell(struct rio_mport *mport,
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2005-11-07 02:00:20 -07:00
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void *dev_id,
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2005-11-07 02:00:15 -07:00
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u16 start,
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u16 end,
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2005-11-07 02:00:20 -07:00
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void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src,
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2005-11-07 02:00:15 -07:00
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u16 dst, u16 info))
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{
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int rc = 0;
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struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
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if (res) {
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rio_init_dbell_res(res, start, end);
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/* Make sure these doorbells aren't in use */
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if ((rc =
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request_resource(&mport->riores[RIO_DOORBELL_RESOURCE],
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res)) < 0) {
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kfree(res);
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goto out;
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}
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/* Hook the doorbell callback */
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2005-11-07 02:00:20 -07:00
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rc = rio_setup_inb_dbell(mport, dev_id, res, dinb);
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2005-11-07 02:00:15 -07:00
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} else
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rc = -ENOMEM;
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out:
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return rc;
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}
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/**
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* rio_release_inb_dbell - release inbound doorbell message service
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* @mport: RIO master port from which to release the doorbell resource
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* @start: Doorbell info range start
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* @end: Doorbell info range end
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*
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* Releases ownership of an inbound doorbell resource and removes
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* callback from the doorbell event list. Returns 0 if the request
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* has been satisfied.
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*/
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int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end)
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{
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int rc = 0, found = 0;
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struct rio_dbell *dbell;
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list_for_each_entry(dbell, &mport->dbells, node) {
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if ((dbell->res->start == start) && (dbell->res->end == end)) {
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found = 1;
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break;
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}
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}
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/* If we can't find an exact match, fail */
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if (!found) {
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rc = -EINVAL;
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goto out;
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}
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/* Delete from list */
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list_del(&dbell->node);
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/* Release the doorbell resource */
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rc = release_resource(dbell->res);
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/* Free the doorbell event */
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kfree(dbell);
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out:
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return rc;
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}
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/**
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* rio_request_outb_dbell - request outbound doorbell message range
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* @rdev: RIO device from which to allocate the doorbell resource
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* @start: Doorbell message range start
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* @end: Doorbell message range end
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*
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* Requests ownership of a doorbell message range. Returns a resource
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* if the request has been satisfied or %NULL on failure.
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*/
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struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start,
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u16 end)
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{
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struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
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if (res) {
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rio_init_dbell_res(res, start, end);
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/* Make sure these doorbells aren't in use */
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if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res)
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< 0) {
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kfree(res);
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res = NULL;
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}
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}
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return res;
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}
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/**
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* rio_release_outb_dbell - release outbound doorbell message range
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* @rdev: RIO device from which to release the doorbell resource
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* @res: Doorbell resource to be freed
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*
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* Releases ownership of a doorbell message range. Returns 0 if the
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* request has been satisfied.
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*/
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int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res)
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{
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int rc = release_resource(res);
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kfree(res);
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return rc;
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}
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/**
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* rio_mport_get_feature - query for devices' extended features
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* @port: Master port to issue transaction
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* @local: Indicate a local master port or remote device access
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* @destid: Destination ID of the device
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* @hopcount: Number of switch hops to the device
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* @ftr: Extended feature code
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*
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* Tell if a device supports a given RapidIO capability.
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* Returns the offset of the requested extended feature
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* block within the device's RIO configuration space or
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* 0 in case the device does not support it. Possible
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* values for @ftr:
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*
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* %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices
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*
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* %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices
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*
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* %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices
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*
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* %RIO_EFB_SER_EP_ID LP/Serial EP Devices
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*
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* %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices
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*
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* %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices
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|
*/
|
|
|
|
u32
|
|
|
|
rio_mport_get_feature(struct rio_mport * port, int local, u16 destid,
|
|
|
|
u8 hopcount, int ftr)
|
|
|
|
{
|
|
|
|
u32 asm_info, ext_ftr_ptr, ftr_header;
|
|
|
|
|
|
|
|
if (local)
|
|
|
|
rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info);
|
|
|
|
else
|
|
|
|
rio_mport_read_config_32(port, destid, hopcount,
|
|
|
|
RIO_ASM_INFO_CAR, &asm_info);
|
|
|
|
|
|
|
|
ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK;
|
|
|
|
|
|
|
|
while (ext_ftr_ptr) {
|
|
|
|
if (local)
|
|
|
|
rio_local_read_config_32(port, ext_ftr_ptr,
|
|
|
|
&ftr_header);
|
|
|
|
else
|
|
|
|
rio_mport_read_config_32(port, destid, hopcount,
|
|
|
|
ext_ftr_ptr, &ftr_header);
|
|
|
|
if (RIO_GET_BLOCK_ID(ftr_header) == ftr)
|
|
|
|
return ext_ftr_ptr;
|
|
|
|
if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header)))
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did
|
|
|
|
* @vid: RIO vid to match or %RIO_ANY_ID to match all vids
|
|
|
|
* @did: RIO did to match or %RIO_ANY_ID to match all dids
|
|
|
|
* @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids
|
|
|
|
* @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids
|
|
|
|
* @from: Previous RIO device found in search, or %NULL for new search
|
|
|
|
*
|
|
|
|
* Iterates through the list of known RIO devices. If a RIO device is
|
|
|
|
* found with a matching @vid, @did, @asm_vid, @asm_did, the reference
|
|
|
|
* count to the device is incrememted and a pointer to its device
|
|
|
|
* structure is returned. Otherwise, %NULL is returned. A new search
|
|
|
|
* is initiated by passing %NULL to the @from argument. Otherwise, if
|
|
|
|
* @from is not %NULL, searches continue from next device on the global
|
|
|
|
* list. The reference count for @from is always decremented if it is
|
|
|
|
* not %NULL.
|
|
|
|
*/
|
|
|
|
struct rio_dev *rio_get_asm(u16 vid, u16 did,
|
|
|
|
u16 asm_vid, u16 asm_did, struct rio_dev *from)
|
|
|
|
{
|
|
|
|
struct list_head *n;
|
|
|
|
struct rio_dev *rdev;
|
|
|
|
|
|
|
|
WARN_ON(in_interrupt());
|
|
|
|
spin_lock(&rio_global_list_lock);
|
|
|
|
n = from ? from->global_list.next : rio_devices.next;
|
|
|
|
|
|
|
|
while (n && (n != &rio_devices)) {
|
|
|
|
rdev = rio_dev_g(n);
|
|
|
|
if ((vid == RIO_ANY_ID || rdev->vid == vid) &&
|
|
|
|
(did == RIO_ANY_ID || rdev->did == did) &&
|
|
|
|
(asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) &&
|
|
|
|
(asm_did == RIO_ANY_ID || rdev->asm_did == asm_did))
|
|
|
|
goto exit;
|
|
|
|
n = n->next;
|
|
|
|
}
|
|
|
|
rdev = NULL;
|
|
|
|
exit:
|
|
|
|
rio_dev_put(from);
|
|
|
|
rdev = rio_dev_get(rdev);
|
|
|
|
spin_unlock(&rio_global_list_lock);
|
|
|
|
return rdev;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* rio_get_device - Begin or continue searching for a RIO device by vid/did
|
|
|
|
* @vid: RIO vid to match or %RIO_ANY_ID to match all vids
|
|
|
|
* @did: RIO did to match or %RIO_ANY_ID to match all dids
|
|
|
|
* @from: Previous RIO device found in search, or %NULL for new search
|
|
|
|
*
|
|
|
|
* Iterates through the list of known RIO devices. If a RIO device is
|
|
|
|
* found with a matching @vid and @did, the reference count to the
|
|
|
|
* device is incrememted and a pointer to its device structure is returned.
|
|
|
|
* Otherwise, %NULL is returned. A new search is initiated by passing %NULL
|
|
|
|
* to the @from argument. Otherwise, if @from is not %NULL, searches
|
|
|
|
* continue from next device on the global list. The reference count for
|
|
|
|
* @from is always decremented if it is not %NULL.
|
|
|
|
*/
|
|
|
|
struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from)
|
|
|
|
{
|
|
|
|
return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void rio_fixup_device(struct rio_dev *dev)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __devinit rio_init(void)
|
|
|
|
{
|
|
|
|
struct rio_dev *dev = NULL;
|
|
|
|
|
|
|
|
while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) {
|
|
|
|
rio_fixup_device(dev);
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
device_initcall(rio_init);
|
|
|
|
|
|
|
|
int rio_init_mports(void)
|
|
|
|
{
|
|
|
|
int rc = 0;
|
|
|
|
struct rio_mport *port;
|
|
|
|
|
|
|
|
list_for_each_entry(port, &rio_mports, node) {
|
|
|
|
if (!request_mem_region(port->iores.start,
|
|
|
|
port->iores.end - port->iores.start,
|
|
|
|
port->name)) {
|
|
|
|
printk(KERN_ERR
|
|
|
|
"RIO: Error requesting master port region %8.8lx-%8.8lx\n",
|
|
|
|
port->iores.start, port->iores.end - 1);
|
|
|
|
rc = -ENOMEM;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (port->host_deviceid >= 0)
|
|
|
|
rio_enum_mport(port);
|
|
|
|
else
|
|
|
|
rio_disc_mport(port);
|
|
|
|
}
|
|
|
|
|
|
|
|
out:
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
void rio_register_mport(struct rio_mport *port)
|
|
|
|
{
|
|
|
|
list_add_tail(&port->node, &rio_mports);
|
|
|
|
}
|
|
|
|
|
|
|
|
EXPORT_SYMBOL_GPL(rio_local_get_device_id);
|
|
|
|
EXPORT_SYMBOL_GPL(rio_get_device);
|
|
|
|
EXPORT_SYMBOL_GPL(rio_get_asm);
|
|
|
|
EXPORT_SYMBOL_GPL(rio_request_inb_dbell);
|
|
|
|
EXPORT_SYMBOL_GPL(rio_release_inb_dbell);
|
|
|
|
EXPORT_SYMBOL_GPL(rio_request_outb_dbell);
|
|
|
|
EXPORT_SYMBOL_GPL(rio_release_outb_dbell);
|
|
|
|
EXPORT_SYMBOL_GPL(rio_request_inb_mbox);
|
|
|
|
EXPORT_SYMBOL_GPL(rio_release_inb_mbox);
|
|
|
|
EXPORT_SYMBOL_GPL(rio_request_outb_mbox);
|
|
|
|
EXPORT_SYMBOL_GPL(rio_release_outb_mbox);
|