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/* $Id: shub_intr.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, 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
*/
#include <linux/types.h>
#include <linux/slab.h>
#include <asm/sn/types.h>
#include <asm/sn/sgi.h>
#include <asm/sn/driver.h>
#include <asm/sn/iograph.h>
#include <asm/param.h>
#include <asm/sn/pio.h>
#include <asm/sn/xtalk/xwidget.h>
#include <asm/sn/io.h>
#include <asm/sn/sn_private.h>
#include <asm/sn/addrs.h>
#include <asm/sn/invent.h>
#include <asm/sn/hcl.h>
#include <asm/sn/hcl_util.h>
#include <asm/sn/intr.h>
#include <asm/sn/xtalk/xtalkaddrs.h>
#include <asm/sn/klconfig.h>
#include <asm/sn/sn2/shub_mmr.h>
#include <asm/sn/sn_cpuid.h>
/* ARGSUSED */
void
hub_intr_init(vertex_hdl_t hubv)
{
}
xwidgetnum_t
hub_widget_id(nasid_t nasid)
{
hubii_wcr_t ii_wcr; /* the control status register */
ii_wcr.wcr_reg_value = REMOTE_HUB_L(nasid,IIO_WCR);
return ii_wcr.wcr_fields_s.wcr_widget_id;
}
static hub_intr_t
do_hub_intr_alloc(vertex_hdl_t dev,
device_desc_t dev_desc,
vertex_hdl_t owner_dev,
int uncond_nothread)
{
cpuid_t cpu = 0;
int vector;
hub_intr_t intr_hdl;
cnodeid_t cnode;
int cpuphys, slice;
int nasid;
iopaddr_t xtalk_addr;
struct xtalk_intr_s *xtalk_info;
xwidget_info_t xwidget_info;
ilvl_t intr_swlevel = 0;
cpu = intr_heuristic(dev, dev_desc, -1, 0, owner_dev, NULL, &vector);
if (cpu == CPU_NONE) {
printk("Unable to allocate interrupt for 0x%p\n", (void *)owner_dev);
return(0);
}
cpuphys = cpu_physical_id(cpu);
slice = cpu_physical_id_to_slice(cpuphys);
nasid = cpu_physical_id_to_nasid(cpuphys);
cnode = cpuid_to_cnodeid(cpu);
if (slice) {
xtalk_addr = SH_II_INT1 | ((unsigned long)nasid << 36) | (1UL << 47);
} else {
xtalk_addr = SH_II_INT0 | ((unsigned long)nasid << 36) | (1UL << 47);
}
intr_hdl = snia_kmem_alloc_node(sizeof(struct hub_intr_s), KM_NOSLEEP, cnode);
ASSERT_ALWAYS(intr_hdl);
xtalk_info = &intr_hdl->i_xtalk_info;
xtalk_info->xi_dev = dev;
xtalk_info->xi_vector = vector;
xtalk_info->xi_addr = xtalk_addr;
xwidget_info = xwidget_info_get(dev);
if (xwidget_info) {
xtalk_info->xi_target = xwidget_info_masterid_get(xwidget_info);
}
intr_hdl->i_swlevel = intr_swlevel;
intr_hdl->i_cpuid = cpu;
intr_hdl->i_bit = vector;
intr_hdl->i_flags |= HUB_INTR_IS_ALLOCED;
return(intr_hdl);
}
hub_intr_t
hub_intr_alloc(vertex_hdl_t dev,
device_desc_t dev_desc,
vertex_hdl_t owner_dev)
{
return(do_hub_intr_alloc(dev, dev_desc, owner_dev, 0));
}
hub_intr_t
hub_intr_alloc_nothd(vertex_hdl_t dev,
device_desc_t dev_desc,
vertex_hdl_t owner_dev)
{
return(do_hub_intr_alloc(dev, dev_desc, owner_dev, 1));
}
void
hub_intr_free(hub_intr_t intr_hdl)
{
cpuid_t cpu = intr_hdl->i_cpuid;
int vector = intr_hdl->i_bit;
xtalk_intr_t xtalk_info;
if (intr_hdl->i_flags & HUB_INTR_IS_CONNECTED) {
xtalk_info = &intr_hdl->i_xtalk_info;
xtalk_info->xi_dev = 0;
xtalk_info->xi_vector = 0;
xtalk_info->xi_addr = 0;
hub_intr_disconnect(intr_hdl);
}
if (intr_hdl->i_flags & HUB_INTR_IS_ALLOCED) {
kfree(intr_hdl);
}
intr_unreserve_level(cpu, vector);
}
int
hub_intr_connect(hub_intr_t intr_hdl,
intr_func_t intr_func, /* xtalk intr handler */
void *intr_arg, /* arg to intr handler */
xtalk_intr_setfunc_t setfunc,
void *setfunc_arg)
{
int rv;
cpuid_t cpu = intr_hdl->i_cpuid;
int vector = intr_hdl->i_bit;
ASSERT(intr_hdl->i_flags & HUB_INTR_IS_ALLOCED);
rv = intr_connect_level(cpu, vector, intr_hdl->i_swlevel, NULL);
if (rv < 0) {
return rv;
}
intr_hdl->i_xtalk_info.xi_setfunc = setfunc;
intr_hdl->i_xtalk_info.xi_sfarg = setfunc_arg;
if (setfunc) {
(*setfunc)((xtalk_intr_t)intr_hdl);
}
intr_hdl->i_flags |= HUB_INTR_IS_CONNECTED;
return 0;
}
/*
* Disassociate handler with the specified interrupt.
*/
void
hub_intr_disconnect(hub_intr_t intr_hdl)
{
/*REFERENCED*/
int rv;
cpuid_t cpu = intr_hdl->i_cpuid;
int bit = intr_hdl->i_bit;
xtalk_intr_setfunc_t setfunc;
setfunc = intr_hdl->i_xtalk_info.xi_setfunc;
/* TBD: send disconnected interrupts somewhere harmless */
if (setfunc) (*setfunc)((xtalk_intr_t)intr_hdl);
rv = intr_disconnect_level(cpu, bit);
ASSERT(rv == 0);
intr_hdl->i_flags &= ~HUB_INTR_IS_CONNECTED;
}
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