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/*
* RapidIO interconnect services
* (RapidIO Interconnect Specification, http://www.rapidio.org)
*
* Copyright 2005 MontaVista Software, Inc.
* Matt Porter <mporter@kernel.crashing.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/rio.h>
#include <linux/rio_drv.h>
#include <linux/rio_ids.h>
#include <linux/rio_regs.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include "rio.h"
static LIST_HEAD(rio_mports);
/**
* rio_local_get_device_id - Get the base/extended device id for a port
* @port: RIO master port from which to get the deviceid
*
* Reads the base/extended device id from the local device
* implementing the master port. Returns the 8/16-bit device
* id.
*/
u16 rio_local_get_device_id(struct rio_mport *port)
{
u32 result;
rio_local_read_config_32(port, RIO_DID_CSR, &result);
return (RIO_GET_DID(port->sys_size, result));
}
/**
* rio_request_inb_mbox - request inbound mailbox service
* @mport: RIO master port from which to allocate the mailbox resource
* @dev_id: Device specific pointer to pass on event
* @mbox: Mailbox number to claim
* @entries: Number of entries in inbound mailbox queue
* @minb: Callback to execute when inbound message is received
*
* Requests ownership of an inbound mailbox resource and binds
* a callback function to the resource. Returns %0 on success.
*/
int rio_request_inb_mbox(struct rio_mport *mport,
void *dev_id,
int mbox,
int entries,
void (*minb) (struct rio_mport * mport, void *dev_id, int mbox,
int slot))
{
int rc = 0;
struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
if (res) {
rio_init_mbox_res(res, mbox, mbox);
/* Make sure this mailbox isn't in use */
if ((rc =
request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE],
res)) < 0) {
kfree(res);
goto out;
}
mport->inb_msg[mbox].res = res;
/* Hook the inbound message callback */
mport->inb_msg[mbox].mcback = minb;
rc = rio_open_inb_mbox(mport, dev_id, mbox, entries);
} else
rc = -ENOMEM;
out:
return rc;
}
/**
* rio_release_inb_mbox - release inbound mailbox message service
* @mport: RIO master port from which to release the mailbox resource
* @mbox: Mailbox number to release
*
* Releases ownership of an inbound mailbox resource. Returns 0
* if the request has been satisfied.
*/
int rio_release_inb_mbox(struct rio_mport *mport, int mbox)
{
rio_close_inb_mbox(mport, mbox);
/* Release the mailbox resource */
return release_resource(mport->inb_msg[mbox].res);
}
/**
* rio_request_outb_mbox - request outbound mailbox service
* @mport: RIO master port from which to allocate the mailbox resource
* @dev_id: Device specific pointer to pass on event
* @mbox: Mailbox number to claim
* @entries: Number of entries in outbound mailbox queue
* @moutb: Callback to execute when outbound message is sent
*
* Requests ownership of an outbound mailbox resource and binds
* a callback function to the resource. Returns 0 on success.
*/
int rio_request_outb_mbox(struct rio_mport *mport,
void *dev_id,
int mbox,
int entries,
void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot))
{
int rc = 0;
struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
if (res) {
rio_init_mbox_res(res, mbox, mbox);
/* Make sure this outbound mailbox isn't in use */
if ((rc =
request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE],
res)) < 0) {
kfree(res);
goto out;
}
mport->outb_msg[mbox].res = res;
/* Hook the inbound message callback */
mport->outb_msg[mbox].mcback = moutb;
rc = rio_open_outb_mbox(mport, dev_id, mbox, entries);
} else
rc = -ENOMEM;
out:
return rc;
}
/**
* rio_release_outb_mbox - release outbound mailbox message service
* @mport: RIO master port from which to release the mailbox resource
* @mbox: Mailbox number to release
*
* Releases ownership of an inbound mailbox resource. Returns 0
* if the request has been satisfied.
*/
int rio_release_outb_mbox(struct rio_mport *mport, int mbox)
{
rio_close_outb_mbox(mport, mbox);
/* Release the mailbox resource */
return release_resource(mport->outb_msg[mbox].res);
}
/**
* rio_setup_inb_dbell - bind inbound doorbell callback
* @mport: RIO master port to bind the doorbell callback
* @dev_id: Device specific pointer to pass on event
* @res: Doorbell message resource
* @dinb: Callback to execute when doorbell is received
*
* Adds a doorbell resource/callback pair into a port's
* doorbell event list. Returns 0 if the request has been
* satisfied.
*/
static int
rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res,
void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst,
u16 info))
{
int rc = 0;
struct rio_dbell *dbell;
if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) {
rc = -ENOMEM;
goto out;
}
dbell->res = res;
dbell->dinb = dinb;
dbell->dev_id = dev_id;
list_add_tail(&dbell->node, &mport->dbells);
out:
return rc;
}
/**
* rio_request_inb_dbell - request inbound doorbell message service
* @mport: RIO master port from which to allocate the doorbell resource
* @dev_id: Device specific pointer to pass on event
* @start: Doorbell info range start
* @end: Doorbell info range end
* @dinb: Callback to execute when doorbell is received
*
* Requests ownership of an inbound doorbell resource and binds
* a callback function to the resource. Returns 0 if the request
* has been satisfied.
*/
int rio_request_inb_dbell(struct rio_mport *mport,
void *dev_id,
u16 start,
u16 end,
void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src,
u16 dst, u16 info))
{
int rc = 0;
struct resource *res = kmalloc(sizeof(struct resource), GFP_KERNEL);
if (res) {
rio_init_dbell_res(res, start, end);
/* Make sure these doorbells aren't in use */
if ((rc =
request_resource(&mport->riores[RIO_DOORBELL_RESOURCE],
res)) < 0) {
kfree(res);
goto out;
}
/* Hook the doorbell callback */
rc = rio_setup_inb_dbell(mport, dev_id, res, dinb);
} else
rc = -ENOMEM;
out:
return rc;
}
/**
* rio_release_inb_dbell - release inbound doorbell message service
* @mport: RIO master port from which to release the doorbell resource
* @start: Doorbell info range start
* @end: Doorbell info range end
*
* Releases ownership of an inbound doorbell resource and removes
* callback from the doorbell event list. Returns 0 if the request
* has been satisfied.
*/
int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end)
{
int rc = 0, found = 0;
struct rio_dbell *dbell;
list_for_each_entry(dbell, &mport->dbells, node) {
if ((dbell->res->start == start) && (dbell->res->end == end)) {
found = 1;
break;
}
}
/* If we can't find an exact match, fail */
if (!found) {
rc = -EINVAL;
goto out;
}
/* Delete from list */
list_del(&dbell->node);
/* Release the doorbell resource */
rc = release_resource(dbell->res);
/* Free the doorbell event */
kfree(dbell);
|