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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, 2000-2002 Silicon Graphics, Inc. All rights reserved.
*/
/*
* hubspc.c - Hub Memory Space Management Driver
* This driver implements the managers for the following
* memory resources:
* 1) reference counters
*/
#include <linux/types.h>
#include <linux/config.h>
#include <linux/slab.h>
#include <asm/sn/sgi.h>
#include <asm/sn/io.h>
#include <asm/sn/sn_cpuid.h>
#include <linux/devfs_fs.h>
#include <linux/devfs_fs_kernel.h>
#include <asm/io.h>
#include <asm/sn/iograph.h>
#include <asm/sn/invent.h>
#include <asm/sn/hcl.h>
#include <asm/sn/labelcl.h>
#include <asm/sn/sn1/mem_refcnt.h>
#include <asm/sn/addrs.h>
#include <asm/sn/snconfig.h>
#include <asm/sn/sn1/hubspc.h>
#include <asm/sn/ksys/elsc.h>
#include <asm/sn/simulator.h>
/* Uncomment the following line for tracing */
/* #define HUBSPC_DEBUG 1 */
int hubspc_devflag = D_MP;
/***********************************************************************/
/* CPU Prom Space */
/***********************************************************************/
typedef struct cpuprom_info {
devfs_handle_t prom_dev;
devfs_handle_t nodevrtx;
struct cpuprom_info *next;
}cpuprom_info_t;
static cpuprom_info_t *cpuprom_head;
static spinlock_t cpuprom_spinlock;
#define PROM_LOCK() mutex_spinlock(&cpuprom_spinlock)
#define PROM_UNLOCK(s) mutex_spinunlock(&cpuprom_spinlock, (s))
/*
* Add prominfo to the linked list maintained.
*/
void
prominfo_add(devfs_handle_t hub, devfs_handle_t prom)
{
cpuprom_info_t *info;
unsigned long s;
info = kmalloc(sizeof(cpuprom_info_t), GFP_KERNEL);
ASSERT(info);
info->prom_dev = prom;
info->nodevrtx = hub;
s = PROM_LOCK();
info->next = cpuprom_head;
cpuprom_head = info;
PROM_UNLOCK(s);
}
void
prominfo_del(devfs_handle_t prom)
{
unsigned long s;
cpuprom_info_t *info;
cpuprom_info_t **prev;
s = PROM_LOCK();
prev = &cpuprom_head;
while ( (info = *prev) ) {
if (info->prom_dev == prom) {
*prev = info->next;
PROM_UNLOCK(s);
return;
}
prev = &info->next;
}
PROM_UNLOCK(s);
ASSERT(0);
}
devfs_handle_t
prominfo_nodeget(devfs_handle_t prom)
{
unsigned long s;
cpuprom_info_t *info;
s = PROM_LOCK();
info = cpuprom_head;
while (info) {
if(info->prom_dev == prom) {
PROM_UNLOCK(s);
return info->nodevrtx;
}
info = info->next;
}
PROM_UNLOCK(s);
return 0;
}
#if defined(CONFIG_IA64_SGI_SN1)
#define SN_PROMVERSION INV_IP35PROM
/* Add "detailed" labelled inventory information to the
* prom vertex
*/
void
cpuprom_detailed_inventory_info_add(devfs_handle_t prom_dev,devfs_handle_t node)
{
invent_miscinfo_t *cpuprom_inventory_info;
extern invent_generic_t *klhwg_invent_alloc(cnodeid_t cnode,
int class, int size);
cnodeid_t cnode = hubdev_cnodeid_get(node);
/* Allocate memory for the extra inventory information
* for the prom
*/
cpuprom_inventory_info = (invent_miscinfo_t *)
klhwg_invent_alloc(cnode, INV_PROM, sizeof(invent_miscinfo_t));
ASSERT(cpuprom_inventory_info);
/* Set the enabled flag so that the hinv interprets this
* information
*/
cpuprom_inventory_info->im_gen.ig_flag = INVENT_ENABLED;
cpuprom_inventory_info->im_type = SN_PROMVERSION;
/* Store prom revision into inventory information */
cpuprom_inventory_info->im_rev = IP27CONFIG.pvers_rev;
cpuprom_inventory_info->im_version = IP27CONFIG.pvers_vers;
/* Store this info as labelled information hanging off the
* prom device vertex
*/
hwgraph_info_add_LBL(prom_dev, INFO_LBL_DETAIL_INVENT,
(arbitrary_info_t) cpuprom_inventory_info);
/* Export this information so that user programs can get to
* this by using attr_get()
*/
hwgraph_info_export_LBL(prom_dev, INFO_LBL_DETAIL_INVENT,
sizeof(invent_miscinfo_t));
}
#endif /* CONFIG_IA64_SGI_SN1 */
/***********************************************************************/
/* Base Hub Space Driver */
/***********************************************************************/
/*
* hubspc_init
* Registration of the hubspc devices with the hub manager
*/
void
hubspc_init(void)
{
/*
* Register with the hub manager
*/
/* The reference counters */
#if defined(CONFIG_IA64_SGI_SN1)
hubdev_register(mem_refcnt_attach);
#endif
#ifdef CONFIG_IA64_SGI_SN1
/* L1 system controller link */
if ( !IS_RUNNING_ON_SIMULATOR() ) {
/* initialize the L1 link */
extern void l1_init(void);
l1_init();
}
#endif /* CONFIG_IA64_SGI_SN1 */
#ifdef HUBSPC_DEBUG
printk("hubspc_init: Completed\n");
#endif /* HUBSPC_DEBUG */
/* Initialize spinlocks */
mutex_spinlock_init(&cpuprom_spinlock);
}
/* ARGSUSED */
int
hubspc_open(devfs_handle_t *devp, mode_t oflag, int otyp, cred_t *crp)
{
return (0);
}
/* ARGSUSED */
int
hubspc_close(devfs_handle_t dev, int oflag, int otyp, cred_t *crp)
{
return (0);
}
/* ARGSUSED */
int
hubspc_map(devfs_handle_t dev, vhandl_t *vt, off_t off, size_t len, uint prot)
{
/*REFERENCED*/
int errcode = 0;
/* check validity of request */
if( len == 0 ) {
return -ENXIO;
}
return errcode;
}
/* ARGSUSED */
int
hubspc_unmap(devfs_handle_t dev, vhandl_t *vt)
{
return (0);
}
/* ARGSUSED */
int
hubspc_ioctl(devfs_handle_t dev,
int cmd,
void *arg,
int mode,
cred_t *cred_p,
int *rvalp)
{
return (0);
}
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