patch-2.4.22 linux-2.4.22/arch/ia64/sn/io/sn1/hub_intr.c

• 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));
-}