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/* $Id: mem_refcnt.c,v 1.1 2002/02/28 17:31:25 marcelo Exp $
*
* 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.
*/
#include <linux/types.h>
#include <asm/sn/arch.h>
#include <asm/sn/sgi.h>
#include <asm/sn/io.h>
#include <asm/sn/sn_cpuid.h>
#include <asm/sn/invent.h>
#include <asm/sn/hcl.h>
#include <asm/sn/hcl_util.h>
#include <asm/sn/nodepda.h>
#include <asm/sn/iograph.h>
#include <asm/sn/sn1/mem_refcnt.h>
#include <asm/sn/sn1/hwcntrs.h>
#include <asm/sn/sn1/hubspc.h>
// From numa_hw.h
#define MIGR_COUNTER_MAX_GET(nodeid) \
(NODEPDA_MCD((nodeid))->migr_system_kparms.migr_threshold_reference)
/*
* Get the Absolute Theshold
*/
#define MIGR_THRESHOLD_ABS_GET(nodeid) ( \
MD_MIG_VALUE_THRESH_GET(COMPACT_TO_NASID_NODEID(nodeid)))
/*
* Get the current Differential Threshold
*/
#define MIGR_THRESHOLD_DIFF_GET(nodeid) \
(NODEPDA_MCD(nodeid)->migr_as_kparms.migr_base_threshold)
#define NUM_OF_HW_PAGES_PER_SW_PAGE() (NBPP / MD_PAGE_SIZE)
// #include "migr_control.h"
int
mem_refcnt_attach(devfs_handle_t hub)
{
#if 0
devfs_handle_t refcnt_dev;
hwgraph_char_device_add(hub,
"refcnt",
"hubspc_",
&refcnt_dev);
device_info_set(refcnt_dev, (void*)(ulong)HUBSPC_REFCOUNTERS);
#endif
return (0);
}
/*ARGSUSED*/
int
mem_refcnt_open(devfs_handle_t *devp, mode_t oflag, int otyp, cred_t *crp)
{
cnodeid_t node;
node = master_node_get(*devp);
ASSERT( (node >= 0) && (node < numnodes) );
if (NODEPDA(node)->migr_refcnt_counterbuffer == NULL) {
return (ENODEV);
}
ASSERT( NODEPDA(node)->migr_refcnt_counterbase != NULL );
ASSERT( NODEPDA(node)->migr_refcnt_cbsize != (size_t)0 );
return (0);
}
/*ARGSUSED*/
int
mem_refcnt_close(devfs_handle_t dev, int oflag, int otyp, cred_t *crp)
{
return 0;
}
/*ARGSUSED*/
int
mem_refcnt_mmap(devfs_handle_t dev, vhandl_t *vt, off_t off, size_t len, uint prot)
{
cnodeid_t node;
int errcode;
char* buffer;
size_t blen;
node = master_node_get(dev);
ASSERT( (node >= 0) && (node < numnodes) );
ASSERT( NODEPDA(node)->migr_refcnt_counterbuffer != NULL);
ASSERT( NODEPDA(node)->migr_refcnt_counterbase != NULL );
ASSERT( NODEPDA(node)->migr_refcnt_cbsize != 0 );
/*
* XXXX deal with prot's somewhere around here....
*/
buffer = NODEPDA(node)->migr_refcnt_counterbuffer;
blen = NODEPDA(node)->migr_refcnt_cbsize;
/*
* Force offset to be a multiple of sizeof(refcnt_t)
* We round up.
*/
off = (((off - 1)/sizeof(refcnt_t)) + 1) * sizeof(refcnt_t);
if ( ((buffer + blen) - (buffer + off + len)) < 0 ) {
return (EPERM);
}
errcode = v_mapphys(vt,
buffer + off,
len);
return errcode;
}
/*ARGSUSED*/
int
mem_refcnt_unmap(devfs_handle_t dev, vhandl_t *vt)
{
return 0;
}
/* ARGSUSED */
int
mem_refcnt_ioctl(devfs_handle_t dev,
int cmd,
void *arg,
int mode,
cred_t *cred_p,
int *rvalp)
{
cnodeid_t node;
int errcode;
extern int numnodes;
node = master_node_get(dev);
ASSERT( (node >= 0) && (node < numnodes) );
ASSERT( NODEPDA(node)->migr_refcnt_counterbuffer != NULL);
ASSERT( NODEPDA(node)->migr_refcnt_counterbase != NULL );
ASSERT( NODEPDA(node)->migr_refcnt_cbsize != 0 );
errcode = 0;
switch (cmd) {
case RCB_INFO_GET:
{
rcb_info_t rcb;
rcb.rcb_len = NODEPDA(node)->migr_refcnt_cbsize;
rcb.rcb_sw_sets = NODEPDA(node)->migr_refcnt_numsets;
rcb.rcb_sw_counters_per_set = numnodes;
rcb.rcb_sw_counter_size = sizeof(refcnt_t);
rcb.rcb_base_pages = NODEPDA(node)->migr_refcnt_numsets /
NUM_OF_HW_PAGES_PER_SW_PAGE();
rcb.rcb_base_page_size = NBPP;
rcb.rcb_base_paddr = ctob(slot_getbasepfn(node, 0));
rcb.rcb_cnodeid = node;
rcb.rcb_granularity = MD_PAGE_SIZE;
#ifdef LATER
rcb.rcb_hw_counter_max = MIGR_COUNTER_MAX_GET(node);
rcb.rcb_diff_threshold = MIGR_THRESHOLD_DIFF_GET(node);
#endif
rcb.rcb_abs_threshold = MIGR_THRESHOLD_ABS_GET(node);
rcb.rcb_num_slots = MAX_MEM_SLOTS;
if (COPYOUT(&rcb, arg, sizeof(rcb_info_t))) {
errcode = EFAULT;
}
break;
}
case RCB_SLOT_GET:
{
rcb_slot_t slot[MAX_MEM_SLOTS];
int s;
int nslots;
nslots = MAX_MEM_SLOTS;
ASSERT(nslots <= MAX_MEM_SLOTS);
for (s = 0; s < nslots; s++) {
slot[s].base = (uint64_t)ctob(slot_getbasepfn(node, s));
#ifdef LATER
slot[s].size = (uint64_t)ctob(slot_getsize(node, s));
#else
slot[s].size = (uint64_t)1;
#endif
}
if (COPYOUT(&slot[0], arg, nslots * sizeof(rcb_slot_t))) {
errcode = EFAULT;
}
*rvalp = nslots;
break;
}
default:
errcode = EINVAL;
break;
}
return errcode;
}
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