Merge master.kernel.org:/pub/scm/linux/kernel/git/aegl/linux-2.6

arch/ia64/kernel/Makefile

@@ -17,6 +17,7 @@ obj-$(CONFIG_IA64_PALINFO)	+= palinfo.o
 obj-$(CONFIG_IOSAPIC)		+= iosapic.o
 obj-$(CONFIG_MODULES)		+= module.o
 obj-$(CONFIG_SMP)		+= smp.o smpboot.o domain.o
+obj-$(CONFIG_NUMA)		+= numa.o
 obj-$(CONFIG_PERFMON)		+= perfmon_default_smpl.o
 obj-$(CONFIG_IA64_CYCLONE)	+= cyclone.o
 obj-$(CONFIG_IA64_MCA_RECOVERY)	+= mca_recovery.o

arch/ia64/kernel/acpi.c

@@ -640,8 +640,10 @@ acpi_boot_init (void)
 			if (smp_boot_data.cpu_phys_id[cpu] != hard_smp_processor_id())
 				node_cpuid[i++].phys_id = smp_boot_data.cpu_phys_id[cpu];
 	}
-	build_cpu_to_node_map();
 # endif
+#endif
+#ifdef CONFIG_ACPI_NUMA
+	build_cpu_to_node_map();
 #endif
 	/* Make boot-up look pretty */
 	printk(KERN_INFO "%d CPUs available, %d CPUs total\n", available_cpus, total_cpus);

arch/ia64/kernel/numa.c

+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * ia64 kernel NUMA specific stuff
+ *
+ * Copyright (C) 2002 Erich Focht <efocht@ess.nec.de>
+ * Copyright (C) 2004 Silicon Graphics, Inc.
+ *   Jesse Barnes <jbarnes@sgi.com>
+ */
+#include <linux/config.h>
+#include <linux/topology.h>
+#include <linux/module.h>
+#include <asm/processor.h>
+#include <asm/smp.h>
+
+u8 cpu_to_node_map[NR_CPUS] __cacheline_aligned;
+EXPORT_SYMBOL(cpu_to_node_map);
+
+cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned;
+
+/**
+ * build_cpu_to_node_map - setup cpu to node and node to cpumask arrays
+ *
+ * Build cpu to node mapping and initialize the per node cpu masks using
+ * info from the node_cpuid array handed to us by ACPI.
+ */
+void __init build_cpu_to_node_map(void)
+{
+	int cpu, i, node;
+
+	for(node=0; node < MAX_NUMNODES; node++)
+		cpus_clear(node_to_cpu_mask[node]);
+
+	for(cpu = 0; cpu < NR_CPUS; ++cpu) {
+		node = -1;
+		for (i = 0; i < NR_CPUS; ++i)
+			if (cpu_physical_id(cpu) == node_cpuid[i].phys_id) {
+				node = node_cpuid[i].nid;
+				break;
+			}
+		cpu_to_node_map[cpu] = (node >= 0) ? node : 0;
+		if (node >= 0)
+			cpu_set(cpu, node_to_cpu_mask[node]);
+	}
+}

arch/ia64/kernel/signal.c

@@ -143,6 +143,7 @@ restore_sigcontext (struct sigcontext __user *sc, struct sigscratch *scr)
 
 		__copy_from_user(current->thread.fph, &sc->sc_fr[32], 96*16);
 		psr->mfh = 0;	/* drop signal handler's fph contents... */
+		preempt_disable();
 		if (psr->dfh)
 			ia64_drop_fpu(current);
 		else {
@@ -150,6 +151,7 @@ restore_sigcontext (struct sigcontext __user *sc, struct sigscratch *scr)
 			__ia64_load_fpu(current->thread.fph);
 			ia64_set_local_fpu_owner(current);
 		}
+		preempt_enable();
 	}
 	return err;
 }

arch/ia64/kernel/smpboot.c

@@ -525,47 +525,6 @@ smp_build_cpu_map (void)
 	}
 }
 
-#ifdef CONFIG_NUMA
-
-/* on which node is each logical CPU (one cacheline even for 64 CPUs) */
-u8 cpu_to_node_map[NR_CPUS] __cacheline_aligned;
-EXPORT_SYMBOL(cpu_to_node_map);
-/* which logical CPUs are on which nodes */
-cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned;
-
-/*
- * Build cpu to node mapping and initialize the per node cpu masks.
- */
-void __init
-build_cpu_to_node_map (void)
-{
-	int cpu, i, node;
-
-	for(node=0; node<MAX_NUMNODES; node++)
-		cpus_clear(node_to_cpu_mask[node]);
-	for(cpu = 0; cpu < NR_CPUS; ++cpu) {
-		/*
-		 * All Itanium NUMA platforms I know use ACPI, so maybe we
-		 * can drop this ifdef completely.                    [EF]
-		 */
-#ifdef CONFIG_ACPI_NUMA
-		node = -1;
-		for (i = 0; i < NR_CPUS; ++i)
-			if (cpu_physical_id(cpu) == node_cpuid[i].phys_id) {
-				node = node_cpuid[i].nid;
-				break;
-			}
-#else
-#		error Fixme: Dunno how to build CPU-to-node map.
-#endif
-		cpu_to_node_map[cpu] = (node >= 0) ? node : 0;
-		if (node >= 0)
-			cpu_set(cpu, node_to_cpu_mask[node]);
-	}
-}
-
-#endif /* CONFIG_NUMA */
-
 /*
  * Cycle through the APs sending Wakeup IPIs to boot each.
  */

arch/ia64/kernel/traps.c

@@ -90,14 +90,16 @@ die (const char *str, struct pt_regs *regs, long err)
 		.lock_owner_depth =	0
 	};
 	static int die_counter;
+	int cpu = get_cpu();
 
-	if (die.lock_owner != smp_processor_id()) {
+	if (die.lock_owner != cpu) {
 		console_verbose();
 		spin_lock_irq(&die.lock);
-		die.lock_owner = smp_processor_id();
+		die.lock_owner = cpu;
 		die.lock_owner_depth = 0;
 		bust_spinlocks(1);
 	}
+	put_cpu();
 
 	if (++die.lock_owner_depth < 3) {
 		printk("%s[%d]: %s %ld [%d]\n",

arch/ia64/mm/init.c

@@ -597,6 +597,7 @@ mem_init (void)
 	kclist_add(&kcore_kernel, _stext, _end - _stext);
 
 	for_each_pgdat(pgdat)
+		if (pgdat->bdata->node_bootmem_map)
 			totalram_pages += free_all_bootmem_node(pgdat);
 
 	reserved_pages = 0;

arch/ia64/sn/include/xtalk/hubdev.h

@@ -8,6 +8,8 @@
 #ifndef _ASM_IA64_SN_XTALK_HUBDEV_H
 #define _ASM_IA64_SN_XTALK_HUBDEV_H
 
+#include "xtalk/xwidgetdev.h"
+
 #define HUB_WIDGET_ID_MAX 0xf
 #define DEV_PER_WIDGET (2*2*8)
 #define IIO_ITTE_WIDGET_BITS    4       /* size of widget field */

arch/ia64/sn/kernel/io_init.c

@@ -9,21 +9,28 @@
 #include <linux/bootmem.h>
 #include <linux/nodemask.h>
 #include <asm/sn/types.h>
-#include <asm/sn/sn_sal.h>
 #include <asm/sn/addrs.h>
-#include <asm/sn/pcibus_provider_defs.h>
-#include <asm/sn/pcidev.h>
-#include "pci/pcibr_provider.h"
-#include "xtalk/xwidgetdev.h"
 #include <asm/sn/geo.h>
-#include "xtalk/hubdev.h"
 #include <asm/sn/io.h>
+#include <asm/sn/pcibr_provider.h>
+#include <asm/sn/pcibus_provider_defs.h>
+#include <asm/sn/pcidev.h>
 #include <asm/sn/simulator.h>
+#include <asm/sn/sn_sal.h>
 #include <asm/sn/tioca_provider.h>
+#include "xtalk/hubdev.h"
+#include "xtalk/xwidgetdev.h"
 
-char master_baseio_wid;
 nasid_t master_nasid = INVALID_NASID;	/* Partition Master */
 
+static struct list_head sn_sysdata_list;
+
+/* sysdata list struct */
+struct sysdata_el {
+	struct list_head entry;
+	void *sysdata;
+};
+
 struct slab_info {
 	struct hubdev_info hubdev;
 };
@@ -137,23 +144,6 @@ sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
 	return ret_stuff.v0;
 }
 
-/*
- * sn_alloc_pci_sysdata() - This routine allocates a pci controller
- *	which is expected as the pci_dev and pci_bus sysdata by the Linux
- *	PCI infrastructure.
- */
-static inline struct pci_controller *sn_alloc_pci_sysdata(void)
-{
-	struct pci_controller *pci_sysdata;
-
-	pci_sysdata = kmalloc(sizeof(*pci_sysdata), GFP_KERNEL);
-	if (!pci_sysdata)
-		BUG();
-
-	memset(pci_sysdata, 0, sizeof(*pci_sysdata));
-	return pci_sysdata;
-}
-
 /*
  * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for 
  *	each node in the system.
@@ -221,22 +211,34 @@ static void sn_fixup_ionodes(void)
 
 }
 
+void sn_pci_unfixup_slot(struct pci_dev *dev)
+{
+	struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
+
+	sn_irq_unfixup(dev);
+	pci_dev_put(host_pci_dev);
+	pci_dev_put(dev);
+}
+
 /*
  * sn_pci_fixup_slot() - This routine sets up a slot's resources
  * consistent with the Linux PCI abstraction layer.  Resources acquired
  * from our PCI provider include PIO maps to BAR space and interrupt
  * objects.
  */
-static void sn_pci_fixup_slot(struct pci_dev *dev)
+void sn_pci_fixup_slot(struct pci_dev *dev)
 {
 	int idx;
 	int segment = 0;
-	uint64_t size;
-	struct sn_irq_info *sn_irq_info;
-	struct pci_dev *host_pci_dev;
 	int status = 0;
 	struct pcibus_bussoft *bs;
+ 	struct pci_bus *host_pci_bus;
+ 	struct pci_dev *host_pci_dev;
+ 	struct sn_irq_info *sn_irq_info;
+ 	unsigned long size;
+ 	unsigned int bus_no, devfn;
 
+	pci_dev_get(dev); /* for the sysdata pointer */
 	dev->sysdata = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL);
 	if (SN_PCIDEV_INFO(dev) <= 0)
 		BUG();		/* Cannot afford to run out of memory */
@@ -253,7 +255,7 @@ static void sn_pci_fixup_slot(struct pci_dev *dev)
 				     (u64) __pa(SN_PCIDEV_INFO(dev)),
 				     (u64) __pa(sn_irq_info));
 	if (status)
-		BUG();		/* Cannot get platform pci device information information */
+		BUG(); /* Cannot get platform pci device information */
 
 	/* Copy over PIO Mapped Addresses */
 	for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
@@ -275,15 +277,21 @@ static void sn_pci_fixup_slot(struct pci_dev *dev)
 			dev->resource[idx].parent = &iomem_resource;
 	}
 
-	/* set up host bus linkages */
-	bs = SN_PCIBUS_BUSSOFT(dev->bus);
-	host_pci_dev =
-	    pci_find_slot(SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32,
-			  SN_PCIDEV_INFO(dev)->
-			  pdi_slot_host_handle & 0xffffffff);
+	/*
+	 * Using the PROMs values for the PCI host bus, get the Linux
+ 	 * PCI host_pci_dev struct and set up host bus linkages
+ 	 */
+
+ 	bus_no = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32;
+ 	devfn = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle & 0xffffffff;
+ 	host_pci_bus = pci_find_bus(pci_domain_nr(dev->bus), bus_no);
+ 	host_pci_dev = pci_get_slot(host_pci_bus, devfn);
+
+	SN_PCIDEV_INFO(dev)->host_pci_dev = host_pci_dev;
 	SN_PCIDEV_INFO(dev)->pdi_host_pcidev_info =
 	    					SN_PCIDEV_INFO(host_pci_dev);
 	SN_PCIDEV_INFO(dev)->pdi_linux_pcidev = dev;
+	bs = SN_PCIBUS_BUSSOFT(dev->bus);
 	SN_PCIDEV_INFO(dev)->pdi_pcibus_info = bs;
 
 	if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
@@ -297,6 +305,9 @@ static void sn_pci_fixup_slot(struct pci_dev *dev)
 		SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = sn_irq_info;
 		dev->irq = SN_PCIDEV_INFO(dev)->pdi_sn_irq_info->irq_irq;
 		sn_irq_fixup(dev, sn_irq_info);
+	} else {
+		SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = NULL;
+		kfree(sn_irq_info);
 	}
 }
 
@@ -304,55 +315,57 @@ static void sn_pci_fixup_slot(struct pci_dev *dev)
  * sn_pci_controller_fixup() - This routine sets up a bus's resources
  * consistent with the Linux PCI abstraction layer.
  */
-static void sn_pci_controller_fixup(int segment, int busnum)
+void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
 {
 	int status = 0;
 	int nasid, cnode;
-	struct pci_bus *bus;
 	struct pci_controller *controller;
 	struct pcibus_bussoft *prom_bussoft_ptr;
 	struct hubdev_info *hubdev_info;
 	void *provider_soft;
 	struct sn_pcibus_provider *provider;
 
-	status =
-	    sal_get_pcibus_info((u64) segment, (u64) busnum,
+ 	status = sal_get_pcibus_info((u64) segment, (u64) busnum,
  				     (u64) ia64_tpa(&prom_bussoft_ptr));
-	if (status > 0) {
-		return;		/* bus # does not exist */
-	}
-
+ 	if (status > 0)
+		return;		/*bus # does not exist */
 	prom_bussoft_ptr = __va(prom_bussoft_ptr);
-	controller = sn_alloc_pci_sysdata();
-	/* controller non-zero is BUG'd in sn_alloc_pci_sysdata */
 
-	bus = pci_scan_bus(busnum, &pci_root_ops, controller);
+ 	controller = kcalloc(1,sizeof(struct pci_controller), GFP_KERNEL);
+ 	if (!controller)
+ 		BUG();
+
 	if (bus == NULL) {
+ 		bus = pci_scan_bus(busnum, &pci_root_ops, controller);
+ 		if (bus == NULL)
  			return;	/* error, or bus already scanned */
+ 		bus->sysdata = NULL;
 	}
 
+	if (bus->sysdata)
+		goto error_return; /* sysdata already alloc'd */
+
 	/*
 	 * Per-provider fixup.  Copies the contents from prom to local
 	 * area and links SN_PCIBUS_BUSSOFT().
 	 */
 
-	if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES) {
+	if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES)
 		return;		/* unsupported asic type */
-	}
+
+	if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
+		goto error_return; /* no further fixup necessary */
 
 	provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
-	if (provider == NULL) {
+	if (provider == NULL)
 		return;		/* no provider registerd for this asic */
-	}
 
 	provider_soft = NULL;
-	if (provider->bus_fixup) {
+	if (provider->bus_fixup)
 		provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr);
-	}
 
-	if (provider_soft == NULL) {
+	if (provider_soft == NULL)
 		return;		/* fixup failed or not applicable */
-	}
 
 	/*
 	 * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
@@ -361,12 +374,47 @@ static void sn_pci_controller_fixup(int segment, int busnum)
 
 	bus->sysdata = controller;
 	PCI_CONTROLLER(bus)->platform_data = provider_soft;
-
 	nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
 	cnode = nasid_to_cnodeid(nasid);
 	hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
 	SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
 	    &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
+
+	return;
+
+error_return:
+
+	kfree(controller);
+	return;
+}
+
+void sn_bus_store_sysdata(struct pci_dev *dev)
+{
+	struct sysdata_el *element;
+
+	element = kcalloc(1, sizeof(struct sysdata_el), GFP_KERNEL);
+	if (!element) {
+		dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
+		return;
+	}
+	element->sysdata = dev->sysdata;
+	list_add(&element->entry, &sn_sysdata_list);
+}
+
+void sn_bus_free_sysdata(void)
+{
+	struct sysdata_el *element;
+	struct list_head *list;
+
+sn_sysdata_free_start:
+	list_for_each(list, &sn_sysdata_list) {
+		element = list_entry(list, struct sysdata_el, entry);
+		list_del(&element->entry);
+		kfree(element->sysdata);
+		kfree(element);
+		goto sn_sysdata_free_start;
+	}
+	return;
 }
 
 /*
@@ -403,20 +451,17 @@ static int __init sn_pci_init(void)
 	 */
 	ia64_max_iommu_merge_mask = ~PAGE_MASK;
 	sn_fixup_ionodes();
-	sn_irq = kmalloc(sizeof(struct sn_irq_info *) * NR_IRQS, GFP_KERNEL);
-	if (sn_irq <= 0)
-		BUG();		/* Canno afford to run out of memory. */
-	memset(sn_irq, 0, sizeof(struct sn_irq_info *) * NR_IRQS);
-
+	sn_irq_lh_init();
+	INIT_LIST_HEAD(&sn_sysdata_list);
 	sn_init_cpei_timer();
 
 #ifdef CONFIG_PROC_FS
 	register_sn_procfs();
 #endif
 
-	for (i = 0; i < PCI_BUSES_TO_SCAN; i++) {
-		sn_pci_controller_fixup(0, i);
-	}
+	/* busses are not known yet ... */
+	for (i = 0; i < PCI_BUSES_TO_SCAN; i++)
+		sn_pci_controller_fixup(0, i, NULL);
 
 	/*
 	 * Generic Linux PCI Layer has created the pci_bus and pci_dev 
@@ -425,9 +470,8 @@ static int __init sn_pci_init(void)
 	 */
 
 	while ((pci_dev =
-		pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL) {
+		pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL)
 		sn_pci_fixup_slot(pci_dev);
-	}
 
 	sn_ioif_inited = 1;	/* sn I/O infrastructure now initialized */
 
@@ -469,3 +513,8 @@ cnodeid_get_geoid(cnodeid_t cnode)
 }
 
 subsys_initcall(sn_pci_init);
+EXPORT_SYMBOL(sn_pci_fixup_slot);
+EXPORT_SYMBOL(sn_pci_unfixup_slot);
+EXPORT_SYMBOL(sn_pci_controller_fixup);
+EXPORT_SYMBOL(sn_bus_store_sysdata);
+EXPORT_SYMBOL(sn_bus_free_sysdata);

arch/ia64/sn/kernel/irq.c

@@ -9,13 +9,13 @@
  */
 
 #include <linux/irq.h>
-#include <asm/sn/intr.h>
+#include <linux/spinlock.h>
 #include <asm/sn/addrs.h>
 #include <asm/sn/arch.h>
-#include "xtalk/xwidgetdev.h"
+#include <asm/sn/intr.h>
+#include <asm/sn/pcibr_provider.h>
 #include <asm/sn/pcibus_provider_defs.h>
 #include <asm/sn/pcidev.h>
-#include "pci/pcibr_provider.h"
 #include <asm/sn/shub_mmr.h>
 #include <asm/sn/sn_sal.h>
 
@@ -25,7 +25,8 @@ static void unregister_intr_pda(struct sn_irq_info *sn_irq_info);
 
 extern int sn_force_interrupt_flag;
 extern int sn_ioif_inited;
-struct sn_irq_info **sn_irq;
+static struct list_head **sn_irq_lh;
+static spinlock_t sn_irq_info_lock = SPIN_LOCK_UNLOCKED; /* non-IRQ lock */
 
 static inline uint64_t sn_intr_alloc(nasid_t local_nasid, int local_widget,
 				     u64 sn_irq_info,
@@ -115,82 +116,84 @@ static void sn_end_irq(unsigned int irq)
 		force_interrupt(irq);
 }
 
+static void sn_irq_info_free(struct rcu_head *head);
+
 static void sn_set_affinity_irq(unsigned int irq, cpumask_t mask)
 {
-	struct sn_irq_info *sn_irq_info = sn_irq[irq];
-	struct sn_irq_info *tmp_sn_irq_info;
+	struct sn_irq_info *sn_irq_info, *sn_irq_info_safe;
 	int cpuid, cpuphys;
-	nasid_t t_nasid;	/* nasid to target */
-	int t_slice;		/* slice to target */
-
-	/* allocate a temp sn_irq_info struct to get new target info */
-	tmp_sn_irq_info = kmalloc(sizeof(*tmp_sn_irq_info), GFP_KERNEL);
-	if (!tmp_sn_irq_info)
-		return;
 
 	cpuid = first_cpu(mask);
 	cpuphys = cpu_physical_id(cpuid);
-	t_nasid = cpuid_to_nasid(cpuid);
-	t_slice = cpuid_to_slice(cpuid);
 
-	while (sn_irq_info) {
-		int status;
-		int local_widget;
-		uint64_t bridge = (uint64_t) sn_irq_info->irq_bridge;
-		nasid_t local_nasid = NASID_GET(bridge);
+	list_for_each_entry_safe(sn_irq_info, sn_irq_info_safe,
+				 sn_irq_lh[irq], list) {
+		uint64_t bridge;
+		int local_widget, status;
+		nasid_t local_nasid;
+		struct sn_irq_info *new_irq_info;
+
+		new_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_ATOMIC);
+		if (new_irq_info == NULL)
+			break;
+		memcpy(new_irq_info, sn_irq_info, sizeof(struct sn_irq_info));
 
-		if (!bridge)
+		bridge = (uint64_t) new_irq_info->irq_bridge;
+		if (!bridge) {
+			kfree(new_irq_info);
 			break; /* irq is not a device interrupt */
+		}
+
+		local_nasid = NASID_GET(bridge);
 
 		if (local_nasid & 1)
 			local_widget = TIO_SWIN_WIDGETNUM(bridge);
 		else
 			local_widget = SWIN_WIDGETNUM(bridge);
 
-		/* Free the old PROM sn_irq_info structure */
-		sn_intr_free(local_nasid, local_widget, sn_irq_info);
+		/* Free the old PROM new_irq_info structure */
+		sn_intr_free(local_nasid, local_widget, new_irq_info);
+		/* Update kernels new_irq_info with new target info */
+		unregister_intr_pda(new_irq_info);
 
-		/* allocate a new PROM sn_irq_info struct */
+		/* allocate a new PROM new_irq_info struct */
 		status = sn_intr_alloc(local_nasid, local_widget,
-				       __pa(tmp_sn_irq_info), irq, t_nasid,
-				       t_slice);
+				       __pa(new_irq_info), irq,
+				       cpuid_to_nasid(cpuid),
+				       cpuid_to_slice(cpuid));
 
-		if (status == 0) {
-			/* Update kernels sn_irq_info with new target info */
-			unregister_intr_pda(sn_irq_info);
-			sn_irq_info->irq_cpuid = cpuid;
-			sn_irq_info->irq_nasid = t_nasid;
-			sn_irq_info->irq_slice = t_slice;
-			sn_irq_info->irq_xtalkaddr =
-			    tmp_sn_irq_info->irq_xtalkaddr;
-			sn_irq_info->irq_cookie = tmp_sn_irq_info->irq_cookie;
-			register_intr_pda(sn_irq_info);
-
-			if (IS_PCI_BRIDGE_ASIC(sn_irq_info->irq_bridge_type)) {
-				pcibr_change_devices_irq(sn_irq_info);
+		/* SAL call failed */
+		if (status) {
+			kfree(new_irq_info);
+			break;
 		}
 
-			sn_irq_info = sn_irq_info->irq_next;
+		new_irq_info->irq_cpuid = cpuid;
+		register_intr_pda(new_irq_info);
+
+		if (IS_PCI_BRIDGE_ASIC(new_irq_info->irq_bridge_type))
+			pcibr_change_devices_irq(new_irq_info);
+
+		spin_lock(&sn_irq_info_lock);
+		list_replace_rcu(&sn_irq_info->list, &new_irq_info->list);
+		spin_unlock(&sn_irq_info_lock);
+		call_rcu(&sn_irq_info->rcu, sn_irq_info_free);
 
 #ifdef CONFIG_SMP
 		set_irq_affinity_info((irq & 0xff), cpuphys, 0);
 #endif
-		} else {
-			break;	/* snp_affinity failed the intr_alloc */
-		}
 	}
-	kfree(tmp_sn_irq_info);
 }
 
 struct hw_interrupt_type irq_type_sn = {
-	"SN hub",
-	sn_startup_irq,
-	sn_shutdown_irq,
-	sn_enable_irq,
-	sn_disable_irq,
-	sn_ack_irq,
-	sn_end_irq,
-	sn_set_affinity_irq
+	.typename	= "SN hub",
+	.startup	= sn_startup_irq,
+	.shutdown	= sn_shutdown_irq,
+	.enable		= sn_enable_irq,
+	.disable	= sn_disable_irq,
+	.ack		= sn_ack_irq,
+	.end		= sn_end_irq,
+	.set_affinity	= sn_set_affinity_irq
 };
 
 unsigned int sn_local_vector_to_irq(u8 vector)
@@ -231,19 +234,18 @@ static void unregister_intr_pda(struct sn_irq_info *sn_irq_info)
 	struct sn_irq_info *tmp_irq_info;
 	int i, foundmatch;
 
+	rcu_read_lock();
 	if (pdacpu(cpu)->sn_last_irq == irq) {
 		foundmatch = 0;
-		for (i = pdacpu(cpu)->sn_last_irq - 1; i; i--) {
-			tmp_irq_info = sn_irq[i];
-			while (tmp_irq_info) {
+		for (i = pdacpu(cpu)->sn_last_irq - 1;
+		     i && !foundmatch; i--) {
+			list_for_each_entry_rcu(tmp_irq_info,
+						sn_irq_lh[i],
+						list) {
 				if (tmp_irq_info->irq_cpuid == cpu) {
-					foundmatch++;
+					foundmatch = 1;
 					break;
 				}
-				tmp_irq_info = tmp_irq_info->irq_next;
-			}
-			if (foundmatch) {
-				break;
 			}
 		}
 		pdacpu(cpu)->sn_last_irq = i;
@@ -251,60 +253,27 @@ static void unregister_intr_pda(struct sn_irq_info *sn_irq_info)
 
 	if (pdacpu(cpu)->sn_first_irq == irq) {
 		foundmatch = 0;
-		for (i = pdacpu(cpu)->sn_first_irq + 1; i < NR_IRQS; i++) {
-			tmp_irq_info = sn_irq[i];
-			while (tmp_irq_info) {
+		for (i = pdacpu(cpu)->sn_first_irq + 1;
+		     i < NR_IRQS && !foundmatch; i++) {
+			list_for_each_entry_rcu(tmp_irq_info,
+						sn_irq_lh[i],
+						list) {
 				if (tmp_irq_info->irq_cpuid == cpu) {
-					foundmatch++;
+					foundmatch = 1;
 					break;
 				}
-				tmp_irq_info = tmp_irq_info->irq_next;
-			}
-			if (foundmatch) {
-				break;
 			}
 		}
 		pdacpu(cpu)->sn_first_irq = ((i == NR_IRQS) ? 0 : i);
 	}
+	rcu_read_unlock();
 }
 
-struct sn_irq_info *sn_irq_alloc(nasid_t local_nasid, int local_widget, int irq,
-				 nasid_t nasid, int slice)
+static void sn_irq_info_free(struct rcu_head *head)
 {
 	struct sn_irq_info *sn_irq_info;
-	int status;
-
-	sn_irq_info = kmalloc(sizeof(*sn_irq_info), GFP_KERNEL);
-	if (sn_irq_info == NULL)
-		return NULL;
-
-	memset(sn_irq_info, 0x0, sizeof(*sn_irq_info));
-
-	status =
-	    sn_intr_alloc(local_nasid, local_widget, __pa(sn_irq_info), irq,
-			  nasid, slice);
-
-	if (status) {
-		kfree(sn_irq_info);
-		return NULL;
-	} else {
-		return sn_irq_info;
-	}
-}
-
-void sn_irq_free(struct sn_irq_info *sn_irq_info)
-{
-	uint64_t bridge = (uint64_t) sn_irq_info->irq_bridge;
-	nasid_t local_nasid = NASID_GET(bridge);
-	int local_widget;
-
-	if (local_nasid & 1)	/* tio check */
-		local_widget = TIO_SWIN_WIDGETNUM(bridge);
-	else
-		local_widget = SWIN_WIDGETNUM(bridge);
-
-	sn_intr_free(local_nasid, local_widget, sn_irq_info);
 
+	sn_irq_info = container_of(head, struct sn_irq_info, rcu);
 	kfree(sn_irq_info);
 }
 
@@ -314,30 +283,54 @@ void sn_irq_fixup(struct pci_dev *pci_dev, struct sn_irq_info *sn_irq_info)
 	int slice = sn_irq_info->irq_slice;
 	int cpu = nasid_slice_to_cpuid(nasid, slice);
 
+	pci_dev_get(pci_dev);
 	sn_irq_info->irq_cpuid = cpu;
 	sn_irq_info->irq_pciioinfo = SN_PCIDEV_INFO(pci_dev);
 
 	/* link it into the sn_irq[irq] list */
-	sn_irq_info->irq_next = sn_irq[sn_irq_info->irq_irq];
-	sn_irq[sn_irq_info->irq_irq] = sn_irq_info;
+	spin_lock(&sn_irq_info_lock);
+	list_add_rcu(&sn_irq_info->list, sn_irq_lh[sn_irq_info->irq_irq]);
+	spin_unlock(&sn_irq_info_lock);
 
 	(void)register_intr_pda(sn_irq_info);
 }
 
+void sn_irq_unfixup(struct pci_dev *pci_dev)
+{
+	struct sn_irq_info *sn_irq_info;
+
+	/* Only cleanup IRQ stuff if this device has a host bus context */
+	if (!SN_PCIDEV_BUSSOFT(pci_dev))
+		return;
+
+	sn_irq_info = SN_PCIDEV_INFO(pci_dev)->pdi_sn_irq_info;
+	if (!sn_irq_info || !sn_irq_info->irq_irq) {
+		kfree(sn_irq_info);
+		return;
+	}
+
+	unregister_intr_pda(sn_irq_info);
+	spin_lock(&sn_irq_info_lock);
+	list_del_rcu(&sn_irq_info->list);
+	spin_unlock(&sn_irq_info_lock);
+	call_rcu(&sn_irq_info->rcu, sn_irq_info_free);
+	pci_dev_put(pci_dev);
+}
+
 static void force_interrupt(int irq)
 {
 	struct sn_irq_info *sn_irq_info;
 
 	if (!sn_ioif_inited)
 		return;
-	sn_irq_info = sn_irq[irq];
-	while (sn_irq_info) {
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(sn_irq_info, sn_irq_lh[irq], list) {
 		if (IS_PCI_BRIDGE_ASIC(sn_irq_info->irq_bridge_type) &&
-		    (sn_irq_info->irq_bridge != NULL)) {
+		    (sn_irq_info->irq_bridge != NULL))
 			pcibr_force_interrupt(sn_irq_info);
 	}
-		sn_irq_info = sn_irq_info->irq_next;
-	}
+	rcu_read_unlock();
 }
 
 /*
@@ -402,19 +395,41 @@ static void sn_check_intr(int irq, struct sn_irq_info *sn_irq_info)
 
 void sn_lb_int_war_check(void)
 {
+	struct sn_irq_info *sn_irq_info;
 	int i;
 
 	if (!sn_ioif_inited || pda->sn_first_irq == 0)
 		return;
+
+	rcu_read_lock();
 	for (i = pda->sn_first_irq; i <= pda->sn_last_irq; i++) {
-		struct sn_irq_info *sn_irq_info = sn_irq[i];
-		while (sn_irq_info) {
-			/* Only call for PCI bridges that are fully initialized. */
+		list_for_each_entry_rcu(sn_irq_info, sn_irq_lh[i], list) {
+			/*
+			 * Only call for PCI bridges that are fully
+			 * initialized.
+			 */
 			if (IS_PCI_BRIDGE_ASIC(sn_irq_info->irq_bridge_type) &&
-			    (sn_irq_info->irq_bridge != NULL)) {
+			    (sn_irq_info->irq_bridge != NULL))
 				sn_check_intr(i, sn_irq_info);
 		}
-			sn_irq_info = sn_irq_info->irq_next;
 	}
+	rcu_read_unlock();
+}
+
+void sn_irq_lh_init(void)
+{
+	int i;
+
+	sn_irq_lh = kmalloc(sizeof(struct list_head *) * NR_IRQS, GFP_KERNEL);
+	if (!sn_irq_lh)
+		panic("SN PCI INIT: Failed to allocate memory for PCI init\n");
+
+	for (i = 0; i < NR_IRQS; i++) {
+		sn_irq_lh[i] = kmalloc(sizeof(struct list_head), GFP_KERNEL);
+		if (!sn_irq_lh[i])
+			panic("SN PCI INIT: Failed IRQ memory allocation\n");
+
+		INIT_LIST_HEAD(sn_irq_lh[i]);
 	}
+
 }

arch/ia64/sn/kernel/setup.c

@@ -270,7 +270,7 @@ void __init sn_setup(char **cmdline_p)
 {
 	long status, ticks_per_sec, drift;
 	int pxm;
-	int major = sn_sal_rev_major(), minor = sn_sal_rev_minor();
+	u32 version = sn_sal_rev();
 	extern void sn_cpu_init(void);
 
 	ia64_sn_plat_set_error_handling_features();
@@ -308,22 +308,21 @@ void __init sn_setup(char **cmdline_p)
 	 * support here so we don't have to listen to failed keyboard probe
 	 * messages.
 	 */
-	if ((major < 2 || (major == 2 && minor <= 9)) &&
-	    acpi_kbd_controller_present) {
+	if (version <= 0x0209 && acpi_kbd_controller_present) {
 		printk(KERN_INFO "Disabling legacy keyboard support as prom "
 		       "is too old and doesn't provide FADT\n");
 		acpi_kbd_controller_present = 0;
 	}
 
-	printk("SGI SAL version %x.%02x\n", major, minor);
+	printk("SGI SAL version %x.%02x\n", version >> 8, version & 0x00FF);
 
 	/*
 	 * Confirm the SAL we're running on is recent enough...
 	 */
-	if ((major < SN_SAL_MIN_MAJOR) || (major == SN_SAL_MIN_MAJOR &&
-					   minor < SN_SAL_MIN_MINOR)) {
+	if (version < SN_SAL_MIN_VERSION) {
 		printk(KERN_ERR "This kernel needs SGI SAL version >= "
-		       "%x.%02x\n", SN_SAL_MIN_MAJOR, SN_SAL_MIN_MINOR);
+		       "%x.%02x\n", SN_SAL_MIN_VERSION >> 8,
+		        SN_SAL_MIN_VERSION & 0x00FF);
 		panic("PROM version too old\n");
 	}
 

arch/ia64/sn/kernel/tiocx.c

@@ -14,6 +14,7 @@
 #include <linux/proc_fs.h>
 #include <linux/device.h>
 #include <linux/delay.h>
+#include <asm/system.h>
 #include <asm/uaccess.h>
 #include <asm/sn/sn_sal.h>
 #include <asm/sn/addrs.h>
@@ -481,6 +482,9 @@ static int __init tiocx_init(void)
 	cnodeid_t cnodeid;
 	int found_tiocx_device = 0;
 
+	if (!ia64_platform_is("sn2"))
+		return -ENODEV;
+
 	bus_register(&tiocx_bus_type);
 
 	for (cnodeid = 0; cnodeid < MAX_COMPACT_NODES; cnodeid++) {

arch/ia64/sn/pci/pci_dma.c

@@ -11,9 +11,10 @@
 
 #include <linux/module.h>
 #include <asm/dma.h>
-#include <asm/sn/sn_sal.h>
+#include <asm/sn/pcibr_provider.h>
 #include <asm/sn/pcibus_provider_defs.h>
 #include <asm/sn/pcidev.h>
+#include <asm/sn/sn_sal.h>
 
 #define SG_ENT_VIRT_ADDRESS(sg)	(page_address((sg)->page) + (sg)->offset)
 #define SG_ENT_PHYS_ADDRESS(SG)	virt_to_phys(SG_ENT_VIRT_ADDRESS(SG))

arch/ia64/sn/pci/pcibr/pcibr_ate.c

@@ -8,9 +8,9 @@
 
 #include <linux/types.h>
 #include <asm/sn/sn_sal.h>
+#include <asm/sn/pcibr_provider.h>
 #include <asm/sn/pcibus_provider_defs.h>
 #include <asm/sn/pcidev.h>
-#include "pci/pcibr_provider.h"
 
 int pcibr_invalidate_ate = 0;	/* by default don't invalidate ATE on free */
 

arch/ia64/sn/pci/pcibr/pcibr_dma.c

@@ -8,18 +8,17 @@
 
 #include <linux/types.h>
 #include <linux/pci.h>
-#include <asm/sn/sn_sal.h>
+#include <asm/sn/addrs.h>
 #include <asm/sn/geo.h>
-#include "xtalk/xwidgetdev.h"
-#include "xtalk/hubdev.h"
+#include <asm/sn/pcibr_provider.h>
 #include <asm/sn/pcibus_provider_defs.h>
 #include <asm/sn/pcidev.h>
-#include "pci/tiocp.h"
-#include "pci/pic.h"
-#include "pci/pcibr_provider.h"
-#include "pci/tiocp.h"
+#include <asm/sn/pic.h>
+#include <asm/sn/sn_sal.h>
+#include <asm/sn/tiocp.h>
 #include "tio.h"
-#include <asm/sn/addrs.h>
+#include "xtalk/xwidgetdev.h"
+#include "xtalk/hubdev.h"
 
 extern int sn_ioif_inited;
 

arch/ia64/sn/pci/pcibr/pcibr_provider.c

@@ -6,18 +6,51 @@
  * Copyright (C) 2001-2004 Silicon Graphics, Inc. All rights reserved.
  */
 
-#include <linux/types.h>
 #include <linux/interrupt.h>
+#include <linux/types.h>
 #include <linux/pci.h>
-#include <asm/sn/sn_sal.h>
-#include "xtalk/xwidgetdev.h"
+#include <asm/sn/addrs.h>
 #include <asm/sn/geo.h>
-#include "xtalk/hubdev.h"
+#include <asm/sn/pcibr_provider.h>
 #include <asm/sn/pcibus_provider_defs.h>
 #include <asm/sn/pcidev.h>
-#include "pci/pcibr_provider.h"
-#include <asm/sn/addrs.h>
+#include <asm/sn/sn_sal.h>
+#include "xtalk/xwidgetdev.h"
+#include "xtalk/hubdev.h"
+
+int
+sal_pcibr_slot_enable(struct pcibus_info *soft, int device, void *resp)
+{
+	struct ia64_sal_retval ret_stuff;
+	uint64_t busnum;
+
+	ret_stuff.status = 0;
+	ret_stuff.v0 = 0;
 
+	busnum = soft->pbi_buscommon.bs_persist_busnum;
+	SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_SLOT_ENABLE, (u64) busnum,
+			(u64) device, (u64) resp, 0, 0, 0, 0);
+
+	return (int)ret_stuff.v0;
+}
+
+int
+sal_pcibr_slot_disable(struct pcibus_info *soft, int device, int action,
+		       void *resp)
+{
+	struct ia64_sal_retval ret_stuff;
+	uint64_t busnum;
+
+	ret_stuff.status = 0;
+	ret_stuff.v0 = 0;
+
+	busnum = soft->pbi_buscommon.bs_persist_busnum;
+	SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_SLOT_DISABLE,
+			(u64) busnum, (u64) device, (u64) action,
+			(u64) resp, 0, 0, 0);
+
+	return (int)ret_stuff.v0;
+}
 
 static int sal_pcibr_error_interrupt(struct pcibus_info *soft)
 {
@@ -188,3 +221,6 @@ pcibr_init_provider(void)
 
 	return 0;
 }
+
+EXPORT_SYMBOL_GPL(sal_pcibr_slot_enable);
+EXPORT_SYMBOL_GPL(sal_pcibr_slot_disable);

arch/ia64/sn/pci/pcibr/pcibr_reg.c

@@ -6,13 +6,13 @@
  * Copyright (C) 2004 Silicon Graphics, Inc. All rights reserved.
  */
 
-#include <linux/types.h>
 #include <linux/interrupt.h>
+#include <linux/types.h>
+#include <asm/sn/pcibr_provider.h>
 #include <asm/sn/pcibus_provider_defs.h>
 #include <asm/sn/pcidev.h>
-#include "pci/tiocp.h"
-#include "pci/pic.h"
-#include "pci/pcibr_provider.h"
+#include <asm/sn/pic.h>
+#include <asm/sn/tiocp.h>
 
 union br_ptr {
 	struct tiocp tio;

arch/ia64/sn/pci/tioca_provider.c

@@ -589,8 +589,7 @@ tioca_bus_fixup(struct pcibus_bussoft *prom_bussoft)
 
 	/* sanity check prom rev */
 
-	if (sn_sal_rev_major() < 4 ||
-	    (sn_sal_rev_major() == 4 && sn_sal_rev_minor() < 6)) {
+	if (sn_sal_rev() < 0x0406) {
 		printk
 		    (KERN_ERR "%s:  SGI prom rev 4.06 or greater required "
 		     "for tioca support\n", __FUNCTION__);

drivers/pci/hotplug/Kconfig

@@ -187,9 +187,10 @@ config HOTPLUG_PCI_RPA_DLPAR
 
 config HOTPLUG_PCI_SGI
 	tristate "SGI PCI Hotplug Support"
-	depends on HOTPLUG_PCI && IA64_SGI_SN2
+	depends on HOTPLUG_PCI && (IA64_SGI_SN2 || IA64_GENERIC)
 	help
-	  Say Y here if you have an SGI IA64 Altix system.
+	  Say Y here if you want to use the SGI Altix Hotplug
+	  Driver for PCI devices.
 
 	  When in doubt, say N.
 

drivers/pci/hotplug/Makefile

@@ -14,6 +14,7 @@ obj-$(CONFIG_HOTPLUG_PCI_PCIE)		+= pciehp.o
 obj-$(CONFIG_HOTPLUG_PCI_SHPC)		+= shpchp.o
 obj-$(CONFIG_HOTPLUG_PCI_RPA)		+= rpaphp.o
 obj-$(CONFIG_HOTPLUG_PCI_RPA_DLPAR)	+= rpadlpar_io.o
+obj-$(CONFIG_HOTPLUG_PCI_SGI)		+= sgi_hotplug.o
 
 pci_hotplug-objs	:=	pci_hotplug_core.o
 

drivers/pci/search.c

@@ -379,6 +379,7 @@ int pci_dev_present(const struct pci_device_id *ids)
 EXPORT_SYMBOL(pci_dev_present);
 
 EXPORT_SYMBOL(pci_find_bus);
+EXPORT_SYMBOL(pci_find_next_bus);
 EXPORT_SYMBOL(pci_find_device);
 EXPORT_SYMBOL(pci_find_device_reverse);
 EXPORT_SYMBOL(pci_find_slot);

include/asm-ia64/sn/arch.h

@@ -11,6 +11,7 @@
 #ifndef _ASM_IA64_SN_ARCH_H
 #define _ASM_IA64_SN_ARCH_H
 
+#include <linux/numa.h>
 #include <asm/types.h>
 #include <asm/percpu.h>
 #include <asm/sn/types.h>

include/asm-ia64/sn/intr.h

@@ -9,6 +9,8 @@
 #ifndef _ASM_IA64_SN_INTR_H
 #define _ASM_IA64_SN_INTR_H
 
+#include <linux/rcupdate.h>
+
 #define SGI_UART_VECTOR		(0xe9)
 #define SGI_PCIBR_ERROR		(0x33)
 
@@ -33,7 +35,7 @@
 
 // The SN PROM irq struct
 struct sn_irq_info {
-	struct sn_irq_info *irq_next;	/* sharing irq list	     */
+	struct sn_irq_info *irq_next;	/* deprecated DO NOT USE     */
 	short		irq_nasid;	/* Nasid IRQ is assigned to  */
 	int		irq_slice;	/* slice IRQ is assigned to  */
 	int		irq_cpuid;	/* kernel logical cpuid	     */
@@ -47,6 +49,8 @@ struct sn_irq_info {
 	int		irq_cookie;	/* unique cookie 	     */
 	int		irq_flags;	/* flags */
 	int		irq_share_cnt;	/* num devices sharing IRQ   */
+	struct list_head	list;	/* list of sn_irq_info structs */
+	struct rcu_head		rcu;	/* rcu callback list */
 };
 
 extern void sn_send_IPI_phys(int, long, int, int);

arch/ia64/sn/include/pci/pcibr_provider.h → include/asm-ia64/sn/pcibr_provider.h

@@ -8,6 +8,9 @@
 #ifndef _ASM_IA64_SN_PCI_PCIBR_PROVIDER_H
 #define _ASM_IA64_SN_PCI_PCIBR_PROVIDER_H
 
+#include <asm/sn/intr.h>
+#include <asm/sn/pcibus_provider_defs.h>
+
 /* Workarounds */
 #define PV907516 (1 << 1) /* TIOCP: Don't write the write buffer flush reg */
 
@@ -105,10 +108,11 @@ struct pcibus_info {
 	char                    pbi_hub_xid;
 
 	uint64_t                pbi_devreg[8];
-	spinlock_t              pbi_lock;
 
 	uint32_t		pbi_valid_devices;
 	uint32_t		pbi_enabled_devices;
+
+	spinlock_t              pbi_lock;
 };
 
 /*
@@ -148,4 +152,8 @@ extern void 		pcibr_change_devices_irq(struct sn_irq_info *sn_irq_info);
 extern int 		pcibr_ate_alloc(struct pcibus_info *, int);
 extern void 		pcibr_ate_free(struct pcibus_info *, int);
 extern void 		ate_write(struct pcibus_info *, int, int, uint64_t);
+extern int sal_pcibr_slot_enable(struct pcibus_info *soft, int device,
+				 void *resp);
+extern int sal_pcibr_slot_disable(struct pcibus_info *soft, int device,
+				  int action, void *resp);
 #endif

include/asm-ia64/sn/pcidev.h

@@ -10,11 +10,11 @@
 
 #include <linux/pci.h>
 
-extern struct sn_irq_info **sn_irq;
-
 #define SN_PCIDEV_INFO(pci_dev) \
         ((struct pcidev_info *)(pci_dev)->sysdata)
 
+#define SN_PCIBUS_BUSSOFT_INFO(pci_bus) \
+	(struct pcibus_info *)((struct pcibus_bussoft *)(PCI_CONTROLLER((pci_bus))->platform_data))
 /*
  * Given a pci_bus, return the sn pcibus_bussoft struct.  Note that
  * this only works for root busses, not for busses represented by PPB's.
@@ -23,6 +23,8 @@ extern struct sn_irq_info **sn_irq;
 #define SN_PCIBUS_BUSSOFT(pci_bus) \
         ((struct pcibus_bussoft *)(PCI_CONTROLLER((pci_bus))->platform_data))
 
+#define SN_PCIBUS_BUSSOFT_INFO(pci_bus) \
+	(struct pcibus_info *)((struct pcibus_bussoft *)(PCI_CONTROLLER((pci_bus))->platform_data))
 /*
  * Given a struct pci_dev, return the sn pcibus_bussoft struct.  Note
  * that this is not equivalent to SN_PCIBUS_BUSSOFT(pci_dev->bus) due
@@ -50,9 +52,17 @@ struct pcidev_info {
 
 	struct sn_irq_info	*pdi_sn_irq_info;
 	struct sn_pcibus_provider *pdi_provider;	/* sn pci ops */
+	struct pci_dev 		*host_pci_dev;		/* host bus link */
 };
 
 extern void sn_irq_fixup(struct pci_dev *pci_dev,
 			 struct sn_irq_info *sn_irq_info);
-
+extern void sn_irq_unfixup(struct pci_dev *pci_dev);
+extern void sn_pci_controller_fixup(int segment, int busnum,
+ 				    struct pci_bus *bus);
+extern void sn_bus_store_sysdata(struct pci_dev *dev);
+extern void sn_bus_free_sysdata(void);
+extern void sn_pci_fixup_slot(struct pci_dev *dev);
+extern void sn_pci_unfixup_slot(struct pci_dev *dev);
+extern void sn_irq_lh_init(void);
 #endif				/* _ASM_IA64_SN_PCI_PCIDEV_H */

include/asm-ia64/sn/sn_cpuid.h

@@ -81,11 +81,6 @@
  *
  */
 
-#ifndef CONFIG_SMP
-#define cpu_physical_id(cpuid)			((ia64_getreg(_IA64_REG_CR_LID) >> 16) & 0xffff)
-#endif
-
-
 #define get_node_number(addr)			NASID_GET(addr)
 
 /*

include/asm-ia64/sn/sn_sal.h

@@ -134,43 +134,28 @@
 
 #define SN_SAL_FAKE_PROM			   0x02009999
 
-
 /**
- * sn_sal_rev_major - get the major SGI SAL revision number
+  * sn_sal_revision - get the SGI SAL revision number
   *
- * The SGI PROM stores its version in sal_[ab]_rev_(major|minor).
- * This routine simply extracts the major value from the
- * @ia64_sal_systab structure constructed by ia64_sal_init().
- */
-static inline int
-sn_sal_rev_major(void)
-{
-	struct ia64_sal_systab *systab = efi.sal_systab;
-
-	return (int)systab->sal_b_rev_major;
-}
-
-/**
- * sn_sal_rev_minor - get the minor SGI SAL revision number
+  * The SGI PROM stores its version in the sal_[ab]_rev_(major|minor).
+  * This routine simply extracts the major and minor values and
+  * presents them in a u32 format.
   *
- * The SGI PROM stores its version in sal_[ab]_rev_(major|minor).
- * This routine simply extracts the minor value from the
- * @ia64_sal_systab structure constructed by ia64_sal_init().
+  * For example, version 4.05 would be represented at 0x0405.
   */
-static inline int
-sn_sal_rev_minor(void)
+static inline u32
+sn_sal_rev(void)
 {
 	struct ia64_sal_systab *systab = efi.sal_systab;
 
-	return (int)systab->sal_b_rev_minor;
+	return (u32)(systab->sal_b_rev_major << 8 | systab->sal_b_rev_minor);
 }
 
 /*
  * Specify the minimum PROM revsion required for this kernel.
  * Note that they're stored in hex format...
  */
-#define SN_SAL_MIN_MAJOR	0x4  /* SN2 kernels need at least PROM 4.0 */
-#define SN_SAL_MIN_MINOR	0x0
+#define SN_SAL_MIN_VERSION	0x0404
 
 /*
  * Returns the master console nasid, if the call fails, return an illegal