- /* $Id$
- *
- * 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;
- }