patch-2.4.22 linux-2.4.22/arch/ia64/sn/io/sn1/hub_intr.c
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- Lines: 308
- Date:
1969-12-31 16:00:00.000000000 -0800
- Orig file:
linux-2.4.21/arch/ia64/sn/io/sn1/hub_intr.c
- Orig date:
2002-08-02 17:39:43.000000000 -0700
diff -urN linux-2.4.21/arch/ia64/sn/io/sn1/hub_intr.c linux-2.4.22/arch/ia64/sn/io/sn1/hub_intr.c
@@ -1,307 +0,0 @@
-/* $Id: hub_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, 2000-2002 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/sn_cpuid.h>
-
-extern xtalk_provider_t hub_provider;
-
-/* ARGSUSED */
-void
-hub_intr_init(devfs_handle_t hubv)
-{
-}
-
-/*
- * hub_device_desc_update
- * Update the passed in device descriptor with the actual the
- * target cpu number and interrupt priority level.
- * NOTE : These might be the same as the ones passed in thru
- * the descriptor.
- */
-static void
-hub_device_desc_update(device_desc_t dev_desc,
- ilvl_t intr_swlevel,
- cpuid_t cpu)
-{
-}
-
-int allocate_my_bit = INTRCONNECT_ANYBIT;
-
-/*
- * Allocate resources required for an interrupt as specified in dev_desc.
- * Returns a hub interrupt handle on success, or 0 on failure.
- */
-static hub_intr_t
-do_hub_intr_alloc(devfs_handle_t dev, /* which crosstalk device */
- device_desc_t dev_desc, /* device descriptor */
- devfs_handle_t owner_dev, /* owner of this interrupt, if known */
- int uncond_nothread) /* unconditionally non-threaded */
-{
- cpuid_t cpu = (cpuid_t)0; /* cpu to receive interrupt */
- int cpupicked = 0;
- int bit; /* interrupt vector */
- /*REFERENCED*/
- int intr_resflags = 0;
- hub_intr_t intr_hdl;
- cnodeid_t nodeid; /* node to receive interrupt */
- /*REFERENCED*/
- nasid_t nasid; /* nasid to receive interrupt */
- struct xtalk_intr_s *xtalk_info;
- iopaddr_t xtalk_addr; /* xtalk addr on hub to set intr */
- xwidget_info_t xwidget_info; /* standard crosstalk widget info handle */
- char *intr_name = NULL;
- ilvl_t intr_swlevel = (ilvl_t)0;
- extern int default_intr_pri;
- extern void synergy_intr_alloc(int, int);
-
-
- if (dev_desc) {
- if (dev_desc->flags & D_INTR_ISERR) {
- intr_resflags = II_ERRORINT;
- } else if (!uncond_nothread && !(dev_desc->flags & D_INTR_NOTHREAD)) {
- intr_resflags = II_THREADED;
- } else {
- /* Neither an error nor a thread. */
- intr_resflags = 0;
- }
- } else {
- intr_swlevel = default_intr_pri;
- if (!uncond_nothread)
- intr_resflags = II_THREADED;
- }
-
- /* XXX - Need to determine if the interrupt should be threaded. */
-
- /* If the cpu has not been picked already then choose a candidate
- * interrupt target and reserve the interrupt bit
- */
- if (!cpupicked) {
- cpu = intr_heuristic(dev,dev_desc,allocate_my_bit,
- intr_resflags,owner_dev,
- intr_name,&bit);
- }
-
- /* At this point we SHOULD have a valid cpu */
- if (cpu == CPU_NONE) {
-#if defined(SUPPORT_PRINTING_V_FORMAT)
- printk(KERN_WARNING "%v hub_intr_alloc could not allocate interrupt\n",
- owner_dev);
-#else
- printk(KERN_WARNING "%p hub_intr_alloc could not allocate interrupt\n",
- (void *)owner_dev);
-#endif
- return(0);
-
- }
-
- /* If the cpu has been picked already (due to the bridge data
- * corruption bug) then try to reserve an interrupt bit .
- */
- if (cpupicked) {
- bit = intr_reserve_level(cpu, allocate_my_bit,
- intr_resflags,
- owner_dev, intr_name);
- if (bit < 0) {
-#if defined(SUPPORT_PRINTING_V_FORMAT)
- printk(KERN_WARNING "Could not reserve an interrupt bit for cpu "
- " %d and dev %v\n",
- cpu,owner_dev);
-#else
- printk(KERN_WARNING "Could not reserve an interrupt bit for cpu "
- " %d and dev %p\n",
- (int)cpu, (void *)owner_dev);
-#endif
-
- return(0);
- }
- }
-
- nodeid = cpuid_to_cnodeid(cpu);
- nasid = cpuid_to_nasid(cpu);
- xtalk_addr = HUBREG_AS_XTALKADDR(nasid, PIREG(PI_INT_PEND_MOD, cpuid_to_subnode(cpu)));
-
- /*
- * Allocate an interrupt handle, and fill it in. There are two
- * pieces to an interrupt handle: the piece needed by generic
- * xtalk code which is used by crosstalk device drivers, and
- * the piece needed by low-level IP27 hardware code.
- */
- intr_hdl = snia_kmem_alloc_node(sizeof(struct hub_intr_s), KM_NOSLEEP, nodeid);
- ASSERT_ALWAYS(intr_hdl);
-
- /*
- * Fill in xtalk information for generic xtalk interfaces that
- * operate on xtalk_intr_hdl's.
- */
- xtalk_info = &intr_hdl->i_xtalk_info;
- xtalk_info->xi_dev = dev;
- xtalk_info->xi_vector = bit;
- xtalk_info->xi_addr = xtalk_addr;
-
- /*
- * Regardless of which CPU we ultimately interrupt, a given crosstalk
- * widget always handles interrupts (and PIO and DMA) through its
- * designated "master" crosstalk provider.
- */
- xwidget_info = xwidget_info_get(dev);
- if (xwidget_info)
- xtalk_info->xi_target = xwidget_info_masterid_get(xwidget_info);
-
- /* Fill in low level hub information for hub_* interrupt interface */
- intr_hdl->i_swlevel = intr_swlevel;
- intr_hdl->i_cpuid = cpu;
- intr_hdl->i_bit = bit;
- intr_hdl->i_flags = HUB_INTR_IS_ALLOCED;
-
- /* Store the actual interrupt priority level & interrupt target
- * cpu back in the device descriptor.
- */
- hub_device_desc_update(dev_desc, intr_swlevel, cpu);
- synergy_intr_alloc((int)bit, (int)cpu);
- return(intr_hdl);
-}
-
-/*
- * Allocate resources required for an interrupt as specified in dev_desc.
- * Returns a hub interrupt handle on success, or 0 on failure.
- */
-hub_intr_t
-hub_intr_alloc( devfs_handle_t dev, /* which crosstalk device */
- device_desc_t dev_desc, /* device descriptor */
- devfs_handle_t owner_dev) /* owner of this interrupt, if known */
-{
- return(do_hub_intr_alloc(dev, dev_desc, owner_dev, 0));
-}
-
-/*
- * Allocate resources required for an interrupt as specified in dev_desc.
- * Uncondtionally request non-threaded, regardless of what the device
- * descriptor might say.
- * Returns a hub interrupt handle on success, or 0 on failure.
- */
-hub_intr_t
-hub_intr_alloc_nothd(devfs_handle_t dev, /* which crosstalk device */
- device_desc_t dev_desc, /* device descriptor */
- devfs_handle_t owner_dev) /* owner of this interrupt, if known */
-{
- return(do_hub_intr_alloc(dev, dev_desc, owner_dev, 1));
-}
-
-/*
- * Free resources consumed by intr_alloc.
- */
-void
-hub_intr_free(hub_intr_t intr_hdl)
-{
- cpuid_t cpu = intr_hdl->i_cpuid;
- int bit = intr_hdl->i_bit;
- xtalk_intr_t xtalk_info;
-
- if (intr_hdl->i_flags & HUB_INTR_IS_CONNECTED) {
- /* Setting the following fields in the xtalk interrupt info
- * clears the interrupt target register in the xtalk user
- */
- xtalk_info = &intr_hdl->i_xtalk_info;
- xtalk_info->xi_dev = NODEV;
- 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, bit);
-}
-
-
-/*
- * Associate resources allocated with a previous hub_intr_alloc call with the
- * described handler, arg, name, etc.
- */
-/*ARGSUSED*/
-int
-hub_intr_connect( hub_intr_t intr_hdl, /* xtalk intr resource handle */
- xtalk_intr_setfunc_t setfunc, /* func to set intr hw */
- void *setfunc_arg) /* arg to setfunc */
-{
- int rv;
- cpuid_t cpu = intr_hdl->i_cpuid;
- int bit = intr_hdl->i_bit;
- extern int synergy_intr_connect(int, int);
-
- ASSERT(intr_hdl->i_flags & HUB_INTR_IS_ALLOCED);
-
- rv = intr_connect_level(cpu, bit, 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(synergy_intr_connect((int)bit, (int)cpu));
-}
-
-
-/*
- * 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;
-}
-
-
-/*
- * Return a hwgraph vertex that represents the CPU currently
- * targeted by an interrupt.
- */
-devfs_handle_t
-hub_intr_cpu_get(hub_intr_t intr_hdl)
-{
- cpuid_t cpuid = intr_hdl->i_cpuid;
- ASSERT(cpuid != CPU_NONE);
-
- return(cpuid_to_vertex(cpuid));
-}
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