Viewing file:  hubdev.c (2.97 KB) -rw-r--r--
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/* $Id$
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1992 - 1997, 2000 Silicon Graphics, Inc.
* Copyright (C) 2000 by Colin Ngam
*/
#include <linux/types.h>
#include <linux/slab.h>
#include <asm/sn/sgi.h>
#include <asm/sn/iograph.h>
#include <asm/sn/sn1/hubdev.h>
#include <asm/sn/sn_private.h>
#include <asm/sn/invent.h>
#include <asm/sn/hcl.h>
#include <asm/sn/labelcl.h>
struct hubdev_callout {
int (*attach_method)(devfs_handle_t);
struct hubdev_callout *fp;
};
typedef struct hubdev_callout hubdev_callout_t;
mutex_t hubdev_callout_mutex;
hubdev_callout_t *hubdev_callout_list = NULL;
void
hubdev_init(void)
{
mutex_init(&hubdev_callout_mutex);
hubdev_callout_list = NULL;
}
void
hubdev_register(int (*attach_method)(devfs_handle_t))
{
hubdev_callout_t *callout;
ASSERT(attach_method);
callout = (hubdev_callout_t *)kmem_zalloc(sizeof(hubdev_callout_t), KM_SLEEP);
ASSERT(callout);
mutex_lock(&hubdev_callout_mutex);
/*
* Insert at the end of the list
*/
callout->fp = hubdev_callout_list;
hubdev_callout_list = callout;
callout->attach_method = attach_method;
mutex_unlock(&hubdev_callout_mutex);
}
int
hubdev_unregister(int (*attach_method)(devfs_handle_t))
{
hubdev_callout_t **p;
ASSERT(attach_method);
mutex_lock(&hubdev_callout_mutex);
/*
* Remove registry element containing attach_method
*/
for (p = &hubdev_callout_list; *p != NULL; p = &(*p)->fp) {
if ((*p)->attach_method == attach_method) {
hubdev_callout_t* victim = *p;
*p = (*p)->fp;
kfree(victim);
mutex_unlock(&hubdev_callout_mutex);
return (0);
}
}
mutex_unlock(&hubdev_callout_mutex);
return (ENOENT);
}
int
hubdev_docallouts(devfs_handle_t hub)
{
hubdev_callout_t *p;
int errcode;
mutex_lock(&hubdev_callout_mutex);
for (p = hubdev_callout_list; p != NULL; p = p->fp) {
ASSERT(p->attach_method);
errcode = (*p->attach_method)(hub);
if (errcode != 0) {
mutex_unlock(&hubdev_callout_mutex);
return (errcode);
}
}
mutex_unlock(&hubdev_callout_mutex);
return (0);
}
/*
* Given a hub vertex, return the base address of the Hspec space
* for that hub.
*/
caddr_t
hubdev_prombase_get(devfs_handle_t hub)
{
hubinfo_t hinfo = NULL;
hubinfo_get(hub, &hinfo);
ASSERT(hinfo);
return ((caddr_t)NODE_RBOOT_BASE(hinfo->h_nasid));
}
cnodeid_t
hubdev_cnodeid_get(devfs_handle_t hub)
{
hubinfo_t hinfo = NULL;
hubinfo_get(hub, &hinfo);
ASSERT(hinfo);
return hinfo->h_cnodeid;
}
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