Pull ngam-maule-steiner into release branch

17 files changed, 1494 insertions, 212 deletions

diff --git a/arch/ia64/sn/include/tio.h b/arch/ia64/sn/include/tio.h
index 0139124..6b2e7b7 100644
--- a/arch/ia64/sn/include/tio.h
+++ b/arch/ia64/sn/include/tio.h
@@ -3,7 +3,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2000-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2000-2005 Silicon Graphics, Inc. All rights reserved.
  */
 
 #ifndef _ASM_IA64_SN_TIO_H
@@ -26,6 +26,10 @@
 #define TIO_ITTE_VALID_MASK	0x1
 #define TIO_ITTE_VALID_SHIFT	16
 
+#define TIO_ITTE_WIDGET(itte) \
+	(((itte) >> TIO_ITTE_WIDGET_SHIFT) & TIO_ITTE_WIDGET_MASK)
+#define TIO_ITTE_VALID(itte) \
+	(((itte) >> TIO_ITTE_VALID_SHIFT) & TIO_ITTE_VALID_MASK)
 
 #define TIO_ITTE_PUT(nasid, bigwin, widget, addr, valid) \
         REMOTE_HUB_S((nasid), TIO_ITTE(bigwin), \
diff --git a/arch/ia64/sn/include/xtalk/hubdev.h b/arch/ia64/sn/include/xtalk/hubdev.h
index 580a1c0..71c2b27 100644
--- a/arch/ia64/sn/include/xtalk/hubdev.h
+++ b/arch/ia64/sn/include/xtalk/hubdev.h
@@ -3,7 +3,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 1992 - 1997, 2000-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved.
  */
 #ifndef _ASM_IA64_SN_XTALK_HUBDEV_H
 #define _ASM_IA64_SN_XTALK_HUBDEV_H
@@ -16,6 +16,9 @@
 #define IIO_ITTE_WIDGET_MASK    ((1<<IIO_ITTE_WIDGET_BITS)-1)
 #define IIO_ITTE_WIDGET_SHIFT   8
 
+#define IIO_ITTE_WIDGET(itte)	\
+	(((itte) >> IIO_ITTE_WIDGET_SHIFT) & IIO_ITTE_WIDGET_MASK)
+
 /*
  * Use the top big window as a surrogate for the first small window
  */
@@ -34,7 +37,8 @@ struct sn_flush_device_list {
 	unsigned long sfdl_force_int_addr;
 	unsigned long sfdl_flush_value;
 	volatile unsigned long *sfdl_flush_addr;
-	uint64_t sfdl_persistent_busnum;
+	uint32_t sfdl_persistent_busnum;
+	uint32_t sfdl_persistent_segment;
 	struct pcibus_info *sfdl_pcibus_info;
 	spinlock_t sfdl_flush_lock;
 };
@@ -58,7 +62,8 @@ struct hubdev_info {
 
 	void				*hdi_nodepda;
 	void				*hdi_node_vertex;
-	void				*hdi_xtalk_vertex;
+	uint32_t			max_segment_number;
+	uint32_t			max_pcibus_number;
 };
 
 extern void hubdev_init_node(nodepda_t *, cnodeid_t);
diff --git a/arch/ia64/sn/kernel/bte.c b/arch/ia64/sn/kernel/bte.c
index 647deae..45854c6 100644
--- a/arch/ia64/sn/kernel/bte.c
+++ b/arch/ia64/sn/kernel/bte.c
@@ -29,16 +29,30 @@
 
 /* two interfaces on two btes */
 #define MAX_INTERFACES_TO_TRY		4
+#define MAX_NODES_TO_TRY		2
 
 static struct bteinfo_s *bte_if_on_node(nasid_t nasid, int interface)
 {
 	nodepda_t *tmp_nodepda;
 
+	if (nasid_to_cnodeid(nasid) == -1)
+		return (struct bteinfo_s *)NULL;;
+
 	tmp_nodepda = NODEPDA(nasid_to_cnodeid(nasid));
 	return &tmp_nodepda->bte_if[interface];
 
 }
 
+static inline void bte_start_transfer(struct bteinfo_s *bte, u64 len, u64 mode)
+{
+	if (is_shub2()) {
+		BTE_CTRL_STORE(bte, (IBLS_BUSY | ((len) | (mode) << 24)));
+	} else {
+		BTE_LNSTAT_STORE(bte, len);
+		BTE_CTRL_STORE(bte, mode);
+	}
+}
+
 /************************************************************************
  * Block Transfer Engine copy related functions.
  *
@@ -67,13 +81,15 @@ bte_result_t bte_copy(u64 src, u64 dest, u64 len, u64 mode, void *notification)
 {
 	u64 transfer_size;
 	u64 transfer_stat;
+	u64 notif_phys_addr;
 	struct bteinfo_s *bte;
 	bte_result_t bte_status;
 	unsigned long irq_flags;
 	unsigned long itc_end = 0;
-	struct bteinfo_s *btes_to_try[MAX_INTERFACES_TO_TRY];
-	int bte_if_index;
-	int bte_pri, bte_sec;
+	int nasid_to_try[MAX_NODES_TO_TRY];
+	int my_nasid = get_nasid();
+	int bte_if_index, nasid_index;
+	int bte_first, btes_per_node = BTES_PER_NODE;
 
 	BTE_PRINTK(("bte_copy(0x%lx, 0x%lx, 0x%lx, 0x%lx, 0x%p)\n",
 		    src, dest, len, mode, notification));
@@ -86,36 +102,26 @@ bte_result_t bte_copy(u64 src, u64 dest, u64 len, u64 mode, void *notification)
 		 (src & L1_CACHE_MASK) || (dest & L1_CACHE_MASK));
 	BUG_ON(!(len < ((BTE_LEN_MASK + 1) << L1_CACHE_SHIFT)));
 
-	/* CPU 0 (per node) tries bte0 first, CPU 1 try bte1 first */
-	if (cpuid_to_subnode(smp_processor_id()) == 0) {
-		bte_pri = 0;
-		bte_sec = 1;
-	} else {
-		bte_pri = 1;
-		bte_sec = 0;
-	}
+	/*
+	 * Start with interface corresponding to cpu number
+	 */
+	bte_first = raw_smp_processor_id() % btes_per_node;
 
 	if (mode & BTE_USE_DEST) {
 		/* try remote then local */
-		btes_to_try[0] = bte_if_on_node(NASID_GET(dest), bte_pri);
-		btes_to_try[1] = bte_if_on_node(NASID_GET(dest), bte_sec);
+		nasid_to_try[0] = NASID_GET(dest);
 		if (mode & BTE_USE_ANY) {
-			btes_to_try[2] = bte_if_on_node(get_nasid(), bte_pri);
-			btes_to_try[3] = bte_if_on_node(get_nasid(), bte_sec);
+			nasid_to_try[1] = my_nasid;
 		} else {
-			btes_to_try[2] = NULL;
-			btes_to_try[3] = NULL;
+			nasid_to_try[1] = (int)NULL;
 		}
 	} else {
 		/* try local then remote */
-		btes_to_try[0] = bte_if_on_node(get_nasid(), bte_pri);
-		btes_to_try[1] = bte_if_on_node(get_nasid(), bte_sec);
+		nasid_to_try[0] = my_nasid;
 		if (mode & BTE_USE_ANY) {
-			btes_to_try[2] = bte_if_on_node(NASID_GET(dest), bte_pri);
-			btes_to_try[3] = bte_if_on_node(NASID_GET(dest), bte_sec);
+			nasid_to_try[1] = NASID_GET(dest);
 		} else {
-			btes_to_try[2] = NULL;
-			btes_to_try[3] = NULL;
+			nasid_to_try[1] = (int)NULL;
 		}
 	}
 
@@ -123,11 +129,12 @@ retry_bteop:
 	do {
 		local_irq_save(irq_flags);
 
-		bte_if_index = 0;
+		bte_if_index = bte_first;
+		nasid_index = 0;
 
 		/* Attempt to lock one of the BTE interfaces. */
-		while (bte_if_index < MAX_INTERFACES_TO_TRY) {
-			bte = btes_to_try[bte_if_index++];
+		while (nasid_index < MAX_NODES_TO_TRY) {
+			bte = bte_if_on_node(nasid_to_try[nasid_index],bte_if_index);
 
 			if (bte == NULL) {
 				continue;
@@ -143,6 +150,15 @@ retry_bteop:
 					break;
 				}
 			}
+
+			bte_if_index = (bte_if_index + 1) % btes_per_node; /* Next interface */
+			if (bte_if_index == bte_first) {
+				/*
+				 * We've tried all interfaces on this node
+				 */
+				nasid_index++;
+			}
+
 			bte = NULL;
 		}
 
@@ -169,7 +185,13 @@ retry_bteop:
 
 	/* Initialize the notification to a known value. */
 	*bte->most_rcnt_na = BTE_WORD_BUSY;
+	notif_phys_addr = TO_PHYS(ia64_tpa((unsigned long)bte->most_rcnt_na));
 
+	if (is_shub2()) {
+		src = SH2_TIO_PHYS_TO_DMA(src);
+		dest = SH2_TIO_PHYS_TO_DMA(dest);
+		notif_phys_addr = SH2_TIO_PHYS_TO_DMA(notif_phys_addr);
+	}
 	/* Set the source and destination registers */
 	BTE_PRINTKV(("IBSA = 0x%lx)\n", (TO_PHYS(src))));
 	BTE_SRC_STORE(bte, TO_PHYS(src));
@@ -177,14 +199,12 @@ retry_bteop:
 	BTE_DEST_STORE(bte, TO_PHYS(dest));
 
 	/* Set the notification register */
-	BTE_PRINTKV(("IBNA = 0x%lx)\n",
-		     TO_PHYS(ia64_tpa((unsigned long)bte->most_rcnt_na))));
-	BTE_NOTIF_STORE(bte,
-			TO_PHYS(ia64_tpa((unsigned long)bte->most_rcnt_na)));
+	BTE_PRINTKV(("IBNA = 0x%lx)\n", notif_phys_addr));
+	BTE_NOTIF_STORE(bte, notif_phys_addr);
 
 	/* Initiate the transfer */
 	BTE_PRINTK(("IBCT = 0x%lx)\n", BTE_VALID_MODE(mode)));
-	BTE_START_TRANSFER(bte, transfer_size, BTE_VALID_MODE(mode));
+	bte_start_transfer(bte, transfer_size, BTE_VALID_MODE(mode));
 
 	itc_end = ia64_get_itc() + (40000000 * local_cpu_data->cyc_per_usec);
 
@@ -195,6 +215,7 @@ retry_bteop:
 	}
 
 	while ((transfer_stat = *bte->most_rcnt_na) == BTE_WORD_BUSY) {
+		cpu_relax();
 		if (ia64_get_itc() > itc_end) {
 			BTE_PRINTK(("BTE timeout nasid 0x%x bte%d IBLS = 0x%lx na 0x%lx\n",
 				NASID_GET(bte->bte_base_addr), bte->bte_num,
diff --git a/arch/ia64/sn/kernel/huberror.c b/arch/ia64/sn/kernel/huberror.c
index 5c39b43..5c5eb01 100644
--- a/arch/ia64/sn/kernel/huberror.c
+++ b/arch/ia64/sn/kernel/huberror.c
@@ -76,7 +76,7 @@ void hubiio_crb_free(struct hubdev_info *hubdev_info, int crbnum)
 	 */
 	REMOTE_HUB_S(hubdev_info->hdi_nasid, IIO_ICDR, (IIO_ICDR_PND | crbnum));
 	while (REMOTE_HUB_L(hubdev_info->hdi_nasid, IIO_ICDR) & IIO_ICDR_PND)
-		udelay(1);
+		cpu_relax();
 
 }
 
diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index 414cdf2..4564ed0 100644
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -18,6 +18,7 @@
 #include <asm/sn/simulator.h>
 #include <asm/sn/sn_sal.h>
 #include <asm/sn/tioca_provider.h>
+#include <asm/sn/tioce_provider.h>
 #include "xtalk/hubdev.h"
 #include "xtalk/xwidgetdev.h"
 
@@ -44,6 +45,9 @@ int sn_ioif_inited = 0;		/* SN I/O infrastructure initialized? */
 
 struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];	/* indexed by asic type */
 
+static int max_segment_number = 0; /* Default highest segment number */
+static int max_pcibus_number = 255; /* Default highest pci bus number */
+
 /*
  * Hooks and struct for unsupported pci providers
  */
@@ -157,13 +161,28 @@ static void sn_fixup_ionodes(void)
 	uint64_t nasid;
 	int i, widget;
 
+	/*
+	 * Get SGI Specific HUB chipset information.
+	 * Inform Prom that this kernel can support domain bus numbering.
+	 */
 	for (i = 0; i < numionodes; i++) {
 		hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
 		nasid = cnodeid_to_nasid(i);
+		hubdev->max_segment_number = 0xffffffff;
+		hubdev->max_pcibus_number = 0xff;
 		status = sal_get_hubdev_info(nasid, (uint64_t) __pa(hubdev));
 		if (status)
 			continue;
 
+		/* Save the largest Domain and pcibus numbers found. */
+		if (hubdev->max_segment_number) {
+			/*
+			 * Dealing with a Prom that supports segments.
+			 */
+			max_segment_number = hubdev->max_segment_number;
+			max_pcibus_number = hubdev->max_pcibus_number;
+		}
+
 		/* Attach the error interrupt handlers */
 		if (nasid & 1)
 			ice_error_init(hubdev);
@@ -230,7 +249,7 @@ void sn_pci_unfixup_slot(struct pci_dev *dev)
 void sn_pci_fixup_slot(struct pci_dev *dev)
 {
 	int idx;
-	int segment = 0;
+	int segment = pci_domain_nr(dev->bus);
 	int status = 0;
 	struct pcibus_bussoft *bs;
  	struct pci_bus *host_pci_bus;
@@ -283,9 +302,9 @@ void sn_pci_fixup_slot(struct pci_dev *dev)
  	 * PCI host_pci_dev struct and set up host bus linkages
  	 */
 
- 	bus_no = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32;
+ 	bus_no = (SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32) & 0xff;
  	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_bus = pci_find_bus(segment, bus_no);
  	host_pci_dev = pci_get_slot(host_pci_bus, devfn);
 
 	SN_PCIDEV_INFO(dev)->host_pci_dev = host_pci_dev;
@@ -333,6 +352,7 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
 	prom_bussoft_ptr = __va(prom_bussoft_ptr);
 
  	controller = kcalloc(1,sizeof(struct pci_controller), GFP_KERNEL);
+	controller->segment = segment;
  	if (!controller)
  		BUG();
 
@@ -390,7 +410,7 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
 	if (controller->node >= num_online_nodes()) {
 		struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
 
-		printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%lu"
+		printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u"
 				    "L_IO=%lx L_MEM=%lx BASE=%lx\n",
 			b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
 			b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
@@ -445,6 +465,7 @@ sn_sysdata_free_start:
 static int __init sn_pci_init(void)
 {
 	int i = 0;
+	int j = 0;
 	struct pci_dev *pci_dev = NULL;
 	extern void sn_init_cpei_timer(void);
 #ifdef CONFIG_PROC_FS
@@ -464,6 +485,7 @@ static int __init sn_pci_init(void)
 
 	pcibr_init_provider();
 	tioca_init_provider();
+	tioce_init_provider();
 
 	/*
 	 * This is needed to avoid bounce limit checks in the blk layer
@@ -479,8 +501,9 @@ static int __init sn_pci_init(void)
 #endif
 
 	/* busses are not known yet ... */
-	for (i = 0; i < PCI_BUSES_TO_SCAN; i++)
-		sn_pci_controller_fixup(0, i, NULL);
+	for (i = 0; i <= max_segment_number; i++)
+		for (j = 0; j <= max_pcibus_number; j++)
+			sn_pci_controller_fixup(i, j, NULL);
 
 	/*
 	 * Generic Linux PCI Layer has created the pci_bus and pci_dev 
diff --git a/arch/ia64/sn/kernel/irq.c b/arch/ia64/sn/kernel/irq.c
index 84d276a..9fc7463 100644
--- a/arch/ia64/sn/kernel/irq.c
+++ b/arch/ia64/sn/kernel/irq.c
@@ -5,7 +5,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (c) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2000-2005 Silicon Graphics, Inc.  All Rights Reserved.
  */
 
 #include <linux/irq.h>
@@ -76,16 +76,14 @@ static void sn_enable_irq(unsigned int irq)
 
 static void sn_ack_irq(unsigned int irq)
 {
-	uint64_t event_occurred, mask = 0;
-	int nasid;
+	u64 event_occurred, mask = 0;
 
 	irq = irq & 0xff;
-	nasid = get_nasid();
 	event_occurred =
-	    HUB_L((uint64_t *) GLOBAL_MMR_ADDR(nasid, SH_EVENT_OCCURRED));
+	    HUB_L((u64*)LOCAL_MMR_ADDR(SH_EVENT_OCCURRED));
 	mask = event_occurred & SH_ALL_INT_MASK;
-	HUB_S((uint64_t *) GLOBAL_MMR_ADDR(nasid, SH_EVENT_OCCURRED_ALIAS),
-		 mask);
+	HUB_S((u64*)LOCAL_MMR_ADDR(SH_EVENT_OCCURRED_ALIAS),
+	      mask);
 	__set_bit(irq, (volatile void *)pda->sn_in_service_ivecs);
 
 	move_irq(irq);
@@ -93,15 +91,12 @@ static void sn_ack_irq(unsigned int irq)
 
 static void sn_end_irq(unsigned int irq)
 {
-	int nasid;
 	int ivec;
-	uint64_t event_occurred;
+	u64 event_occurred;
 
 	ivec = irq & 0xff;
 	if (ivec == SGI_UART_VECTOR) {
-		nasid = get_nasid();
-		event_occurred = HUB_L((uint64_t *) GLOBAL_MMR_ADDR
-				       (nasid, SH_EVENT_OCCURRED));
+		event_occurred = HUB_L((u64*)LOCAL_MMR_ADDR (SH_EVENT_OCCURRED));
 		/* If the UART bit is set here, we may have received an
 		 * interrupt from the UART that the driver missed.  To
 		 * make sure, we IPI ourselves to force us to look again.
@@ -132,6 +127,7 @@ static void sn_set_affinity_irq(unsigned int irq, cpumask_t mask)
 		int local_widget, status;
 		nasid_t local_nasid;
 		struct sn_irq_info *new_irq_info;
+		struct sn_pcibus_provider *pci_provider;
 
 		new_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_ATOMIC);
 		if (new_irq_info == NULL)
@@ -171,8 +167,9 @@ static void sn_set_affinity_irq(unsigned int irq, cpumask_t mask)
 		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);
+		pci_provider = sn_pci_provider[new_irq_info->irq_bridge_type];
+		if (pci_provider && pci_provider->target_interrupt)
+			(pci_provider->target_interrupt)(new_irq_info);
 
 		spin_lock(&sn_irq_info_lock);
 		list_replace_rcu(&sn_irq_info->list, &new_irq_info->list);
@@ -317,6 +314,16 @@ void sn_irq_unfixup(struct pci_dev *pci_dev)
 	pci_dev_put(pci_dev);
 }
 
+static inline void
+sn_call_force_intr_provider(struct sn_irq_info *sn_irq_info)
+{
+	struct sn_pcibus_provider *pci_provider;
+
+	pci_provider = sn_pci_provider[sn_irq_info->irq_bridge_type];
+	if (pci_provider && pci_provider->force_interrupt)
+		(*pci_provider->force_interrupt)(sn_irq_info);
+}
+
 static void force_interrupt(int irq)
 {
 	struct sn_irq_info *sn_irq_info;
@@ -325,11 +332,9 @@ static void force_interrupt(int irq)
 		return;
 
 	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))
-			pcibr_force_interrupt(sn_irq_info);
-	}
+	list_for_each_entry_rcu(sn_irq_info, sn_irq_lh[irq], list)
+		sn_call_force_intr_provider(sn_irq_info);
+
 	rcu_read_unlock();
 }
 
@@ -351,6 +356,14 @@ static void sn_check_intr(int irq, struct sn_irq_info *sn_irq_info)
 	struct pcidev_info *pcidev_info;
 	struct pcibus_info *pcibus_info;
 
+	/*
+	 * Bridge types attached to TIO (anything but PIC) do not need this WAR
+	 * since they do not target Shub II interrupt registers.  If that
+	 * ever changes, this check needs to accomodate.
+	 */
+	if (sn_irq_info->irq_bridge_type != PCIIO_ASIC_TYPE_PIC)
+		return;
+
 	pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
 	if (!pcidev_info)
 		return;
@@ -377,16 +390,12 @@ static void sn_check_intr(int irq, struct sn_irq_info *sn_irq_info)
 		break;
 	}
 	if (!test_bit(irr_bit, &irr_reg)) {
-		if (!test_bit(irq, pda->sn_soft_irr)) {
-			if (!test_bit(irq, pda->sn_in_service_ivecs)) {
-				regval &= 0xff;
-				if (sn_irq_info->irq_int_bit & regval &
-				    sn_irq_info->irq_last_intr) {
-					regval &=
-					    ~(sn_irq_info->
-					      irq_int_bit & regval);
-					pcibr_force_interrupt(sn_irq_info);
-				}
+		if (!test_bit(irq, pda->sn_in_service_ivecs)) {
+			regval &= 0xff;
+			if (sn_irq_info->irq_int_bit & regval &
+			    sn_irq_info->irq_last_intr) {
+				regval &= ~(sn_irq_info->irq_int_bit & regval);
+				sn_call_force_intr_provider(sn_irq_info);
 			}
 		}
 	}
@@ -404,13 +413,7 @@ void sn_lb_int_war_check(void)
 	rcu_read_lock();
 	for (i = pda->sn_first_irq; i <= pda->sn_last_irq; i++) {
 		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_check_intr(i, sn_irq_info);
+			sn_check_intr(i, sn_irq_info);
 		}
 	}
 	rcu_read_unlock();
diff --git a/arch/ia64/sn/kernel/setup.c b/arch/ia64/sn/kernel/setup.c
index 7c7fe44..a594aca 100644
--- a/arch/ia64/sn/kernel/setup.c
+++ b/arch/ia64/sn/kernel/setup.c
@@ -80,8 +80,6 @@ EXPORT_PER_CPU_SYMBOL(__sn_cnodeid_to_nasid);
 DEFINE_PER_CPU(struct nodepda_s *, __sn_nodepda);
 EXPORT_PER_CPU_SYMBOL(__sn_nodepda);
 
-partid_t sn_partid = -1;
-EXPORT_SYMBOL(sn_partid);
 char sn_system_serial_number_string[128];
 EXPORT_SYMBOL(sn_system_serial_number_string);
 u64 sn_partition_serial_number;
@@ -403,6 +401,7 @@ static void __init sn_init_pdas(char **cmdline_p)
 		memset(nodepdaindr[cnode], 0, sizeof(nodepda_t));
 		memset(nodepdaindr[cnode]->phys_cpuid, -1,
 		    sizeof(nodepdaindr[cnode]->phys_cpuid));
+		spin_lock_init(&nodepdaindr[cnode]->ptc_lock);
 	}
 
 	/*
@@ -532,8 +531,8 @@ void __init sn_cpu_init(void)
 	 */
 	{
 		u64 pio1[] = {SH1_PIO_WRITE_STATUS_0, 0, SH1_PIO_WRITE_STATUS_1, 0};
-		u64 pio2[] = {SH2_PIO_WRITE_STATUS_0, SH2_PIO_WRITE_STATUS_1,
-			SH2_PIO_WRITE_STATUS_2, SH2_PIO_WRITE_STATUS_3};
+		u64 pio2[] = {SH2_PIO_WRITE_STATUS_0, SH2_PIO_WRITE_STATUS_2,
+			SH2_PIO_WRITE_STATUS_1, SH2_PIO_WRITE_STATUS_3};
 		u64 *pio;
 		pio = is_shub1() ? pio1 : pio2;
 		pda->pio_write_status_addr = (volatile unsigned long *) LOCAL_MMR_ADDR(pio[slice]);
diff --git a/arch/ia64/sn/kernel/sn2/ptc_deadlock.S b/arch/ia64/sn/kernel/sn2/ptc_deadlock.S
index 96cb71d..3fa9506 100644
--- a/arch/ia64/sn/kernel/sn2/ptc_deadlock.S
+++ b/arch/ia64/sn/kernel/sn2/ptc_deadlock.S
@@ -3,7 +3,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2000-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2000-2005 Silicon Graphics, Inc. All rights reserved.
  */
 
 #include <asm/types.h>
@@ -11,7 +11,7 @@
 
 #define DEADLOCKBIT	SH_PIO_WRITE_STATUS_WRITE_DEADLOCK_SHFT
 #define WRITECOUNTMASK	SH_PIO_WRITE_STATUS_PENDING_WRITE_COUNT_MASK
-#define ALIAS_OFFSET	(SH1_PIO_WRITE_STATUS_0_ALIAS-SH1_PIO_WRITE_STATUS_0)
+#define ALIAS_OFFSET	8
 
 
 	.global	sn2_ptc_deadlock_recovery_core
@@ -36,13 +36,15 @@ sn2_ptc_deadlock_recovery_core:
 	extr.u	piowcphy=piowc,0,61;;	// Convert piowc to uncached physical address
 	dep	piowcphy=-1,piowcphy,63,1
 	movl	mask=WRITECOUNTMASK
+	mov	r8=r0
 
 1:
 	add	scr2=ALIAS_OFFSET,piowc	// Address of WRITE_STATUS alias register 
-	mov	scr1=7;;		// Clear DEADLOCK, WRITE_ERROR, MULTI_WRITE_ERROR
-	st8.rel	[scr2]=scr1;;
+	;;
+	ld8.acq	scr1=[scr2];;
 
 5:	ld8.acq	scr1=[piowc];;		// Wait for PIOs to complete.
+	hint	@pause
 	and	scr2=scr1,mask;;	// mask of writecount bits
 	cmp.ne	p6,p0=zeroval,scr2
 (p6)	br.cond.sptk 5b
@@ -57,6 +59,7 @@ sn2_ptc_deadlock_recovery_core:
 	st8.rel [ptc0]=data0		// Write PTC0 & wait for completion.
 
 5:	ld8.acq	scr1=[piowcphy];;	// Wait for PIOs to complete.
+	hint	@pause
 	and	scr2=scr1,mask;;	// mask of writecount bits
 	cmp.ne	p6,p0=zeroval,scr2
 (p6)	br.cond.sptk 5b;;
@@ -67,6 +70,7 @@ sn2_ptc_deadlock_recovery_core:
 (p7)	st8.rel [ptc1]=data1;;		// Now write PTC1.
 
 5:	ld8.acq	scr1=[piowcphy];;	// Wait for PIOs to complete.
+	hint	@pause
 	and	scr2=scr1,mask;;	// mask of writecount bits
 	cmp.ne	p6,p0=zeroval,scr2
 (p6)	br.cond.sptk 5b
@@ -77,6 +81,7 @@ sn2_ptc_deadlock_recovery_core:
 	srlz.i;;
 	////////////// END   PHYSICAL MODE ////////////////////
 
+(p8)	add	r8=1,r8
 (p8)	br.cond.spnt 1b;;		// Repeat if DEADLOCK occurred.
 
 	br.ret.sptk	rp
diff --git a/arch/ia64/sn/kernel/sn2/sn2_smp.c b/arch/ia64/sn/kernel/sn2/sn2_smp.c
index 7af05a7..0a4ee50 100644
--- a/arch/ia64/sn/kernel/sn2/sn2_smp.c
+++ b/arch/ia64/sn/kernel/sn2/sn2_smp.c
@@ -5,7 +5,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2000-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2000-2005 Silicon Graphics, Inc. All rights reserved.
  */
 
 #include <linux/init.h>
@@ -20,6 +20,8 @@
 #include <linux/module.h>
 #include <linux/bitops.h>
 #include <linux/nodemask.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 
 #include <asm/processor.h>
 #include <asm/irq.h>
@@ -39,12 +41,120 @@
 #include <asm/sn/nodepda.h>
 #include <asm/sn/rw_mmr.h>
 
-void sn2_ptc_deadlock_recovery(volatile unsigned long *, unsigned long data0, 
-	volatile unsigned long *, unsigned long data1);
+DEFINE_PER_CPU(struct ptc_stats, ptcstats);
+DECLARE_PER_CPU(struct ptc_stats, ptcstats);
 
 static  __cacheline_aligned DEFINE_SPINLOCK(sn2_global_ptc_lock);
 
-static unsigned long sn2_ptc_deadlock_count;
+void sn2_ptc_deadlock_recovery(short *, short, int, volatile unsigned long *, unsigned long data0,
+	volatile unsigned long *, unsigned long data1);
+
+#ifdef DEBUG_PTC
+/*
+ * ptctest:
+ *
+ * 	xyz - 3 digit hex number:
+ * 		x - Force PTC purges to use shub:
+ * 			0 - no force
+ * 			1 - force
+ * 		y - interupt enable
+ * 			0 - disable interrupts
+ * 			1 - leave interuupts enabled
+ * 		z - type of lock:
+ * 			0 - global lock
+ * 			1 - node local lock
+ * 			2 - no lock
+ *
+ *   	Note: on shub1, only ptctest == 0 is supported. Don't try other values!
+ */
+
+static unsigned int sn2_ptctest = 0;
+
+static int __init ptc_test(char *str)
+{
+	get_option(&str, &sn2_ptctest);
+	return 1;
+}
+__setup("ptctest=", ptc_test);
+
+static inline int ptc_lock(unsigned long *flagp)
+{
+	unsigned long opt = sn2_ptctest & 255;
+
+	switch (opt) {
+	case 0x00:
+		spin_lock_irqsave(&sn2_global_ptc_lock, *flagp);
+		break;
+	case 0x01:
+		spin_lock_irqsave(&sn_nodepda->ptc_lock, *flagp);
+		break;
+	case 0x02:
+		local_irq_save(*flagp);
+		break;
+	case 0x10:
+		spin_lock(&sn2_global_ptc_lock);
+		break;
+	case 0x11:
+		spin_lock(&sn_nodepda->ptc_lock);
+		break;
+	case 0x12:
+		break;
+	default:
+		BUG();
+	}
+	return opt;
+}
+
+static inline void ptc_unlock(unsigned long flags, int opt)
+{
+	switch (opt) {
+	case 0x00:
+		spin_unlock_irqrestore(&sn2_global_ptc_lock, flags);
+		break;
+	case 0x01:
+		spin_unlock_irqrestore(&sn_nodepda->ptc_lock, flags);
+		break;
+	case 0x02:
+		local_irq_restore(flags);
+		break;
+	case 0x10:
+		spin_unlock(&sn2_global_ptc_lock);
+		break;
+	case 0x11:
+		spin_unlock(&sn_nodepda->ptc_lock);
+		break;
+	case 0x12:
+		break;
+	default:
+		BUG();
+	}
+}
+#else
+
+#define sn2_ptctest	0
+
+static inline int ptc_lock(unsigned long *flagp)
+{
+	spin_lock_irqsave(&sn2_global_ptc_lock, *flagp);
+	return 0;
+}
+
+static inline void ptc_unlock(unsigned long flags, int opt)
+{
+	spin_unlock_irqrestore(&sn2_global_ptc_lock, flags);
+}
+#endif
+
+struct ptc_stats {
+	unsigned long ptc_l;
+	unsigned long change_rid;
+	unsigned long shub_ptc_flushes;
+	unsigned long nodes_flushed;
+	unsigned long deadlocks;
+	unsigned long lock_itc_clocks;
+	unsigned long shub_itc_clocks;
+	unsigned long shub_itc_clocks_max;
+};
 
 static inline unsigned long wait_piowc(void)
 {
@@ -89,9 +199,9 @@ void
 sn2_global_tlb_purge(unsigned long start, unsigned long end,
 		     unsigned long nbits)
 {
-	int i, shub1, cnode, mynasid, cpu, lcpu = 0, nasid, flushed = 0;
+	int i, opt, shub1, cnode, mynasid, cpu, lcpu = 0, nasid, flushed = 0;
 	volatile unsigned long *ptc0, *ptc1;
-	unsigned long flags = 0, data0 = 0, data1 = 0;
+	unsigned long itc, itc2, flags, data0 = 0, data1 = 0;
 	struct mm_struct *mm = current->active_mm;
 	short nasids[MAX_NUMNODES], nix;
 	nodemask_t nodes_flushed;
@@ -114,16 +224,19 @@ sn2_global_tlb_purge(unsigned long start, unsigned long end,
 			start += (1UL << nbits);
 		} while (start < end);
 		ia64_srlz_i();
+		__get_cpu_var(ptcstats).ptc_l++;
 		preempt_enable();
 		return;
 	}
 
 	if (atomic_read(&mm->mm_users) == 1) {
 		flush_tlb_mm(mm);
+		__get_cpu_var(ptcstats).change_rid++;
 		preempt_enable();
 		return;
 	}
 
+	itc = ia64_get_itc();
 	nix = 0;
 	for_each_node_mask(cnode, nodes_flushed)
 		nasids[nix++] = cnodeid_to_nasid(cnode);
@@ -148,7 +261,12 @@ sn2_global_tlb_purge(unsigned long start, unsigned long end,
 
 	mynasid = get_nasid();
 
-	spin_lock_irqsave(&sn2_global_ptc_lock, flags);
+	itc = ia64_get_itc();
+	opt = ptc_lock(&flags);
+	itc2 = ia64_get_itc();
+	__get_cpu_var(ptcstats).lock_itc_clocks += itc2 - itc;
+	__get_cpu_var(ptcstats).shub_ptc_flushes++;
+	__get_cpu_var(ptcstats).nodes_flushed += nix;
 
 	do {
 		if (shub1)
@@ -157,7 +275,7 @@ sn2_global_tlb_purge(unsigned long start, unsigned long end,
 			data0 = (data0 & ~SH2_PTC_ADDR_MASK) | (start & SH2_PTC_ADDR_MASK);
 		for (i = 0; i < nix; i++) {
 			nasid = nasids[i];
-			if (unlikely(nasid == mynasid)) {
+			if ((!(sn2_ptctest & 3)) && unlikely(nasid == mynasid)) {
 				ia64_ptcga(start, nbits << 2);
 				ia64_srlz_i();
 			} else {
@@ -169,18 +287,22 @@ sn2_global_tlb_purge(unsigned long start, unsigned long end,
 				flushed = 1;
 			}
 		}
-
 		if (flushed
 		    && (wait_piowc() &
-			SH_PIO_WRITE_STATUS_WRITE_DEADLOCK_MASK)) {
-			sn2_ptc_deadlock_recovery(ptc0, data0, ptc1, data1);
+				(SH_PIO_WRITE_STATUS_WRITE_DEADLOCK_MASK))) {
+			sn2_ptc_deadlock_recovery(nasids, nix, mynasid, ptc0, data0, ptc1, data1);
 		}
 
 		start += (1UL << nbits);
 
 	} while (start < end);
 
-	spin_unlock_irqrestore(&sn2_global_ptc_lock, flags);
+	itc2 = ia64_get_itc() - itc2;
+	__get_cpu_var(ptcstats).shub_itc_clocks += itc2;
+	if (itc2 > __get_cpu_var(ptcstats).shub_itc_clocks_max)
+		__get_cpu_var(ptcstats).shub_itc_clocks_max = itc2;
+
+	ptc_unlock(flags, opt);
 
 	preempt_enable();
 }
@@ -192,31 +314,29 @@ sn2_global_tlb_purge(unsigned long start, unsigned long end,
  * TLB flush transaction.  The recovery sequence is somewhat tricky & is
  * coded in assembly language.
  */
-void sn2_ptc_deadlock_recovery(volatile unsigned long *ptc0, unsigned long data0,
+void sn2_ptc_deadlock_recovery(short *nasids, short nix, int mynasid, volatile unsigned long *ptc0, unsigned long data0,
 	volatile unsigned long *ptc1, unsigned long data1)
 {
 	extern void sn2_ptc_deadlock_recovery_core(volatile unsigned long *, unsigned long,
 	        volatile unsigned long *, unsigned long, volatile unsigned long *, unsigned long);
-	int cnode, mycnode, nasid;
-	volatile unsigned long *piows;
-	volatile unsigned long zeroval;
+	short nasid, i;
+	unsigned long *piows, zeroval;
 
-	sn2_ptc_deadlock_count++;
+	__get_cpu_var(ptcstats).deadlocks++;
 
-	piows = pda->pio_write_status_addr;
+	piows = (unsigned long *) pda->pio_write_status_addr;
 	zeroval = pda->pio_write_status_val;
 
-	mycnode = numa_node_id();
-
-	for_each_online_node(cnode) {
-		if (is_headless_node(cnode) || cnode == mycnode)
+	for (i=0; i < nix; i++) {
+		nasid = nasids[i];
+		if (!(sn2_ptctest & 3) && nasid == mynasid)
 			continue;
-		nasid = cnodeid_to_nasid(cnode);
 		ptc0 = CHANGE_NASID(nasid, ptc0);
 		if (ptc1)
 			ptc1 = CHANGE_NASID(nasid, ptc1);
 		sn2_ptc_deadlock_recovery_core(ptc0, data0, ptc1, data1, piows, zeroval);
 	}
+
 }
 
 /**
@@ -293,3 +413,93 @@ void sn2_send_IPI(int cpuid, int vector, int delivery_mode, int redirect)
 
 	sn_send_IPI_phys(nasid, physid, vector, delivery_mode);
 }
+
+#ifdef CONFIG_PROC_FS
+
+#define PTC_BASENAME	"sgi_sn/ptc_statistics"
+
+static void *sn2_ptc_seq_start(struct seq_file *file, loff_t * offset)
+{
+	if (*offset < NR_CPUS)
+		return offset;
+	return NULL;
+}
+
+static void *sn2_ptc_seq_next(struct seq_file *file, void *data, loff_t * offset)
+{
+	(*offset)++;
+	if (*offset < NR_CPUS)
+		return offset;
+	return NULL;
+}
+
+static void sn2_ptc_seq_stop(struct seq_file *file, void *data)
+{
+}
+
+static int sn2_ptc_seq_show(struct seq_file *file, void *data)
+{
+	struct ptc_stats *stat;
+	int cpu;
+
+	cpu = *(loff_t *) data;
+
+	if (!cpu) {
+		seq_printf(file, "# ptc_l change_rid shub_ptc_flushes shub_nodes_flushed deadlocks lock_nsec shub_nsec shub_nsec_max\n");
+		seq_printf(file, "# ptctest %d\n", sn2_ptctest);
+	}
+
+	if (cpu < NR_CPUS && cpu_online(cpu)) {
+		stat = &per_cpu(ptcstats, cpu);
+		seq_printf(file, "cpu %d %ld %ld %ld %ld %ld %ld %ld %ld\n", cpu, stat->ptc_l,
+				stat->change_rid, stat->shub_ptc_flushes, stat->nodes_flushed,
+				stat->deadlocks,
+				1000 * stat->lock_itc_clocks / per_cpu(cpu_info, cpu).cyc_per_usec,
+				1000 * stat->shub_itc_clocks / per_cpu(cpu_info, cpu).cyc_per_usec,
+				1000 * stat->shub_itc_clocks_max / per_cpu(cpu_info, cpu).cyc_per_usec);
+	}
+
+	return 0;
+}
+
+static struct seq_operations sn2_ptc_seq_ops = {
+	.start = sn2_ptc_seq_start,
+	.next = sn2_ptc_seq_next,
+	.stop = sn2_ptc_seq_stop,
+	.show = sn2_ptc_seq_show
+};
+
+int sn2_ptc_proc_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &sn2_ptc_seq_ops);
+}
+
+static struct file_operations proc_sn2_ptc_operations = {
+	.open = sn2_ptc_proc_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = seq_release,
+};
+
+static struct proc_dir_entry *proc_sn2_ptc;
+
+static int __init sn2_ptc_init(void)
+{
+	if (!(proc_sn2_ptc = create_proc_entry(PTC_BASENAME, 0444, NULL))) {
+		printk(KERN_ERR "unable to create %s proc entry", PTC_BASENAME);
+		return -EINVAL;
+	}
+	proc_sn2_ptc->proc_fops = &proc_sn2_ptc_operations;
+	spin_lock_init(&sn2_global_ptc_lock);
+	return 0;
+}
+
+static void __exit sn2_ptc_exit(void)
+{
+	remove_proc_entry(PTC_BASENAME, NULL);
+}
+
+module_init(sn2_ptc_init);
+module_exit(sn2_ptc_exit);
+#endif /* CONFIG_PROC_FS */
+
diff --git a/arch/ia64/sn/kernel/sn2/sn_hwperf.c b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
index e282142..0513aac 100644
--- a/arch/ia64/sn/kernel/sn2/sn_hwperf.c
+++ b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
@@ -58,7 +58,7 @@ static int sn_hwperf_enum_objects(int *nobj, struct sn_hwperf_object_info **ret)
 	struct sn_hwperf_object_info *objbuf = NULL;
 
 	if ((e = sn_hwperf_init()) < 0) {
-		printk("sn_hwperf_init failed: err %d\n", e);
+		printk(KERN_ERR "sn_hwperf_init failed: err %d\n", e);
 		goto out;
 	}
 
@@ -110,7 +110,7 @@ static int sn_hwperf_geoid_to_cnode(char *location)
 	if (sn_hwperf_location_to_bpos(location, &rack, &bay, &slot, &slab))
 		return -1;
 
-	for (cnode = 0; cnode < numionodes; cnode++) {
+	for_each_node(cnode) {
 		geoid = cnodeid_get_geoid(cnode);
 		module_id = geo_module(geoid);
 		this_rack = MODULE_GET_RACK(module_id);
@@ -123,11 +123,13 @@ static int sn_hwperf_geoid_to_cnode(char *location)
 		}
 	}
 
-	return cnode < numionodes ? cnode : -1;
+	return node_possible(cnode) ? cnode : -1;
 }
 
 static int sn_hwperf_obj_to_cnode(struct sn_hwperf_object_info * obj)
 {
+	if (!SN_HWPERF_IS_NODE(obj) && !SN_HWPERF_IS_IONODE(obj))
+		BUG();
 	if (!obj->sn_hwp_this_part)
 		return -1;
 	return sn_hwperf_geoid_to_cnode(obj->location);
@@ -173,31 +175,199 @@ static const char *sn_hwperf_get_slabname(struct sn_hwperf_object_info *obj,
 	return slabname;
 }
 
-static void print_pci_topology(struct seq_file *s,
-	struct sn_hwperf_object_info *obj, int *ordinal,
-	u64 rack, u64 bay, u64 slot, u64 slab)
+static void print_pci_topology(struct seq_file *s)
+{
+	char *p;
+	size_t sz;
+	int e;
+
+	for (sz = PAGE_SIZE; sz < 16 * PAGE_SIZE; sz += PAGE_SIZE) {
+		if (!(p = (char *)kmalloc(sz, GFP_KERNEL)))
+			break;
+		e = ia64_sn_ioif_get_pci_topology(__pa(p), sz);
+		if (e == SALRET_OK)
+			seq_puts(s, p);
+		kfree(p);
+		if (e == SALRET_OK || e == SALRET_NOT_IMPLEMENTED)
+			break;
+	}
+}
+
+static inline int sn_hwperf_has_cpus(cnodeid_t node)
+{
+	return node_online(node) && nr_cpus_node(node);
+}
+
+static inline int sn_hwperf_has_mem(cnodeid_t node)
+{
+	return node_online(node) && NODE_DATA(node)->node_present_pages;
+}
+
+static struct sn_hwperf_object_info *
+sn_hwperf_findobj_id(struct sn_hwperf_object_info *objbuf,
+	int nobj, int id)
 {
-	char *p1;
-	char *p2;
-	char *pg;
-
-	if (!(pg = (char *)get_zeroed_page(GFP_KERNEL)))
-		return; /* ignore */
-	if (ia64_sn_ioif_get_pci_topology(rack, bay, slot, slab,
-		__pa(pg), PAGE_SIZE) == SN_HWPERF_OP_OK) {
-		for (p1=pg; *p1 && p1 < pg + PAGE_SIZE;) {
-			if (!(p2 = strchr(p1, '\n')))
+	int i;
+	struct sn_hwperf_object_info *p = objbuf;
+
+	for (i=0; i < nobj; i++, p++) {
+		if (p->id == id)
+			return p;
+	}
+
+	return NULL;
+
+}
+
+static int sn_hwperf_get_nearest_node_objdata(struct sn_hwperf_object_info *objbuf,
+	int nobj, cnodeid_t node, cnodeid_t *near_mem_node, cnodeid_t *near_cpu_node)
+{
+	int e;
+	struct sn_hwperf_object_info *nodeobj = NULL;
+	struct sn_hwperf_object_info *op;
+	struct sn_hwperf_object_info *dest;
+	struct sn_hwperf_object_info *router;
+	struct sn_hwperf_port_info ptdata[16];
+	int sz, i, j;
+	cnodeid_t c;
+	int found_mem = 0;
+	int found_cpu = 0;
+
+	if (!node_possible(node))
+		return -EINVAL;
+
+	if (sn_hwperf_has_cpus(node)) {
+		if (near_cpu_node)
+			*near_cpu_node = node;
+		found_cpu++;
+	}
+
+	if (sn_hwperf_has_mem(node)) {
+		if (near_mem_node)
+			*near_mem_node = node;
+		found_mem++;
+	}
+
+	if (found_cpu && found_mem)
+		return 0; /* trivially successful */
+
+	/* find the argument node object */
+	for (i=0, op=objbuf; i < nobj; i++, op++) {
+		if (!SN_HWPERF_IS_NODE(op) && !SN_HWPERF_IS_IONODE(op))
+			continue;
+		if (node == sn_hwperf_obj_to_cnode(op)) {
+			nodeobj = op;
+			break;
+		}
+	}
+	if (!nodeobj) {
+		e = -ENOENT;
+		goto err;
+	}
+
+	/* get it's interconnect topology */
+	sz = op->ports * sizeof(struct sn_hwperf_port_info);
+	if (sz > sizeof(ptdata))
+		BUG();
+	e = ia64_sn_hwperf_op(sn_hwperf_master_nasid,
+			      SN_HWPERF_ENUM_PORTS, nodeobj->id, sz,
+			      (u64)&ptdata, 0, 0, NULL);
+	if (e != SN_HWPERF_OP_OK) {
+		e = -EINVAL;
+		goto err;
+	}
+
+	/* find nearest node with cpus and nearest memory */
+	for (router=NULL, j=0; j < op->ports; j++) {
+		dest = sn_hwperf_findobj_id(objbuf, nobj, ptdata[j].conn_id);
+		if (!dest || SN_HWPERF_FOREIGN(dest) ||
+		    !SN_HWPERF_IS_NODE(dest) || SN_HWPERF_IS_IONODE(dest)) {
+			continue;
+		}
+		c = sn_hwperf_obj_to_cnode(dest);
+		if (!found_cpu && sn_hwperf_has_cpus(c)) {
+			if (near_cpu_node)
+				*near_cpu_node = c;
+			found_cpu++;
+		}
+		if (!found_mem && sn_hwperf_has_mem(c)) {
+			if (near_mem_node)
+				*near_mem_node = c;
+			found_mem++;
+		}
+		if (SN_HWPERF_IS_ROUTER(dest))
+			router = dest;
+	}
+
+	if (router && (!found_cpu || !found_mem)) {
+		/* search for a node connected to the same router */
+		sz = router->ports * sizeof(struct sn_hwperf_port_info);
+		if (sz > sizeof(ptdata))
+			BUG();
+		e = ia64_sn_hwperf_op(sn_hwperf_master_nasid,
+				      SN_HWPERF_ENUM_PORTS, router->id, sz,
+				      (u64)&ptdata, 0, 0, NULL);
+		if (e != SN_HWPERF_OP_OK) {
+			e = -EINVAL;
+			goto err;
+		}
+		for (j=0; j < router->ports; j++) {
+			dest = sn_hwperf_findobj_id(objbuf, nobj,
+				ptdata[j].conn_id);
+			if (!dest || dest->id == node ||
+			    SN_HWPERF_FOREIGN(dest) ||
+			    !SN_HWPERF_IS_NODE(dest) ||
+			    SN_HWPERF_IS_IONODE(dest)) {
+				continue;
+			}
+			c = sn_hwperf_obj_to_cnode(dest);
+			if (!found_cpu && sn_hwperf_has_cpus(c)) {
+				if (near_cpu_node)
+					*near_cpu_node = c;
+				found_cpu++;
+			}
+			if (!found_mem && sn_hwperf_has_mem(c)) {
+				if (near_mem_node)
+					*near_mem_node = c;
+				found_mem++;
+			}
+			if (found_cpu && found_mem)
+				break;
+		}
+	}
+
+	if (!found_cpu || !found_mem) {
+		/* resort to _any_ node with CPUs and memory */
+		for (i=0, op=objbuf; i < nobj; i++, op++) {
+			if (SN_HWPERF_FOREIGN(op) ||
+			    SN_HWPERF_IS_IONODE(op) ||
+			    !SN_HWPERF_IS_NODE(op)) {
+				continue;
+			}
+			c = sn_hwperf_obj_to_cnode(op);
+			if (!found_cpu && sn_hwperf_has_cpus(c)) {
+				if (near_cpu_node)
+					*near_cpu_node = c;
+				found_cpu++;
+			}
+			if (!found_mem && sn_hwperf_has_mem(c)) {
+				if (near_mem_node)
+					*near_mem_node = c;
+				found_mem++;
+			}
+			if (found_cpu && found_mem)
 				break;
-			*p2 = '\0';
-			seq_printf(s, "pcibus %d %s-%s\n",
-				*ordinal, obj->location, p1);
-			(*ordinal)++;
-			p1 = p2 + 1;
 		}
 	}
-	free_page((unsigned long)pg);
+
+	if (!found_cpu || !found_mem)
+		e = -ENODATA;
+
+err:
+	return e;
 }
 
+
 static int sn_topology_show(struct seq_file *s, void *d)
 {
 	int sz;
@@ -214,7 +384,6 @@ static int sn_topology_show(struct seq_file *s, void *d)
 	struct sn_hwperf_object_info *p;
 	struct sn_hwperf_object_info *obj = d;	/* this object */
 	struct sn_hwperf_object_info *objs = s->private; /* all objects */
-	int rack, bay, slot, slab;
 	u8 shubtype;
 	u8 system_size;
 	u8 sharing_size;
@@ -224,7 +393,6 @@ static int sn_topology_show(struct seq_file *s, void *d)
 	u8 region_size;
 	u16 nasid_mask;
 	int nasid_msb;
-	int pci_bus_ordinal = 0;
 
 	if (obj == objs) {
 		seq_printf(s, "# sn_topology version 2\n");
@@ -252,6 +420,8 @@ static int sn_topology_show(struct seq_file *s, void *d)
 			shubtype ? "shub2" : "shub1", 
 			(u64)nasid_mask << nasid_shift, nasid_msb, nasid_shift,
 			system_size, sharing_size, coher, region_size);
+
+		print_pci_topology(s);
 	}
 
 	if (SN_HWPERF_FOREIGN(obj)) {
@@ -271,11 +441,24 @@ static int sn_topology_show(struct seq_file *s, void *d)
 	if (!SN_HWPERF_IS_NODE(obj) && !SN_HWPERF_IS_IONODE(obj))
 		seq_putc(s, '\n');
 	else {
+		cnodeid_t near_mem = -1;
+		cnodeid_t near_cpu = -1;
+
 		seq_printf(s, ", nasid 0x%x", cnodeid_to_nasid(ordinal));
-		for (i=0; i < numionodes; i++) {
-			seq_printf(s, i ? ":%d" : ", dist %d",
-				node_distance(ordinal, i));
+
+		if (sn_hwperf_get_nearest_node_objdata(objs, sn_hwperf_obj_cnt,
+			ordinal, &near_mem, &near_cpu) == 0) {
+			seq_printf(s, ", near_mem_nodeid %d, near_cpu_nodeid %d",
+				near_mem, near_cpu);
+		}
+
+		if (!SN_HWPERF_IS_IONODE(obj)) {
+			for_each_online_node(i) {
+				seq_printf(s, i ? ":%d" : ", dist %d",
+					node_distance(ordinal, i));
+			}
 		}
+
 		seq_putc(s, '\n');
 
 		/*
@@ -299,17 +482,6 @@ static int sn_topology_show(struct seq_file *s, void *d)
 				seq_putc(s, '\n');
 			}
 		}
-
-		/*
-		 * PCI busses attached to this node, if any
-		 */
-		if (sn_hwperf_location_to_bpos(obj->location,
-			&rack, &bay, &slot, &slab)) {
-			/* export pci bus info */
-			print_pci_topology(s, obj, &pci_bus_ordinal,
-				rack, bay, slot, slab);
-
-		}
 	}
 
 	if (obj->ports) {
@@ -571,6 +743,8 @@ sn_hwperf_ioctl(struct inode *in, struct file *fp, u32 op, u64 arg)
 		if ((r = sn_hwperf_enum_objects(&nobj, &objs)) == 0) {
 			memset(p, 0, a.sz);
 			for (i = 0; i < nobj; i++) {
+				if (!SN_HWPERF_IS_NODE(objs + i))
+					continue;
 				node = sn_hwperf_obj_to_cnode(objs + i);
 				for_each_online_cpu(j) {
 					if (node != cpu_to_node(j))
@@ -597,7 +771,7 @@ sn_hwperf_ioctl(struct inode *in, struct file *fp, u32 op, u64 arg)
 
 	case SN_HWPERF_GET_NODE_NASID:
 		if (a.sz != sizeof(u64) ||
-		   (node = a.arg) < 0 || node >= numionodes) {
+		   (node = a.arg) < 0 || !node_possible(node)) {
 			r = -EINVAL;
 			goto error;
 		}
@@ -626,6 +800,14 @@ sn_hwperf_ioctl(struct inode *in, struct file *fp, u32 op, u64 arg)
 				vfree(objs);
 				goto error;
 			}
+
+			if (!SN_HWPERF_IS_NODE(objs + i) &&
+			    !SN_HWPERF_IS_IONODE(objs + i)) {
+			    	r = -ENOENT;
+				vfree(objs);
+				goto error;
+			}
+
 			*(u64 *)p = (u64)sn_hwperf_obj_to_cnode(objs + i);
 			vfree(objs);
 		}
@@ -691,6 +873,7 @@ static int sn_hwperf_init(void)
 
 	/* single threaded, once-only initialization */
 	down(&sn_hwperf_init_mutex);
+
 	if (sn_hwperf_salheap) {
 		up(&sn_hwperf_init_mutex);
 		return e;
@@ -741,19 +924,6 @@ out:
 		sn_hwperf_salheap = NULL;
 		sn_hwperf_obj_cnt = 0;
 	}
-
-	if (!e) {
-		/*
-		 * Register a dynamic misc device for ioctl. Platforms
-		 * supporting hotplug will create /dev/sn_hwperf, else
-		 * user can to look up the minor number in /proc/misc.
-		 */
-		if ((e = misc_register(&sn_hwperf_dev)) != 0) {
-			printk(KERN_ERR "sn_hwperf_init: misc register "
-			       "for \"sn_hwperf\" failed, err %d\n", e);
-		}
-	}
-
 	up(&sn_hwperf_init_mutex);
 	return e;
 }
@@ -781,3 +951,41 @@ int sn_topology_release(struct inode *inode, struct file *file)
 	vfree(seq->private);
 	return seq_release(inode, file);
 }
+
+int sn_hwperf_get_nearest_node(cnodeid_t node,
+	cnodeid_t *near_mem_node, cnodeid_t *near_cpu_node)
+{
+	int e;
+	int nobj;
+	struct sn_hwperf_object_info *objbuf;
+
+	if ((e = sn_hwperf_enum_objects(&nobj, &objbuf)) == 0) {
+		e = sn_hwperf_get_nearest_node_objdata(objbuf, nobj,
+			node, near_mem_node, near_cpu_node);
+		vfree(objbuf);
+	}
+
+	return e;
+}
+
+static int __devinit sn_hwperf_misc_register_init(void)
+{
+	int e;
+
+	sn_hwperf_init();
+
+	/*
+	 * Register a dynamic misc device for hwperf ioctls. Platforms
+	 * supporting hotplug will create /dev/sn_hwperf, else user
+	 * can to look up the minor number in /proc/misc.
+	 */
+	if ((e = misc_register(&sn_hwperf_dev)) != 0) {
+		printk(KERN_ERR "sn_hwperf_misc_register_init: failed to "
+		"register misc device for \"%s\"\n", sn_hwperf_dev.name);
+	}
+
+	return e;
+}
+
+device_initcall(sn_hwperf_misc_register_init); /* after misc_init() */
+EXPORT_SYMBOL(sn_hwperf_get_nearest_node);
diff --git a/arch/ia64/sn/kernel/sn2/sn_proc_fs.c b/arch/ia64/sn/kernel/sn2/sn_proc_fs.c
index 6a80fca..51bf827 100644
--- a/arch/ia64/sn/kernel/sn2/sn_proc_fs.c
+++ b/arch/ia64/sn/kernel/sn2/sn_proc_fs.c
@@ -3,7 +3,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2000-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2000-2005 Silicon Graphics, Inc. All rights reserved.
  */
 #include <linux/config.h>
 #include <asm/uaccess.h>
@@ -15,7 +15,7 @@
 
 static int partition_id_show(struct seq_file *s, void *p)
 {
-	seq_printf(s, "%d\n", sn_local_partid());
+	seq_printf(s, "%d\n", sn_partition_id);
 	return 0;
 }
 
diff --git a/arch/ia64/sn/kernel/sn2/timer_interrupt.c b/arch/ia64/sn/kernel/sn2/timer_interrupt.c
index cde7375..adf5db2 100644
--- a/arch/ia64/sn/kernel/sn2/timer_interrupt.c
+++ b/arch/ia64/sn/kernel/sn2/timer_interrupt.c
@@ -1,7 +1,7 @@
 /*
  *
  *
- * Copyright (c) 2003 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2005 Silicon Graphics, Inc.  All Rights Reserved.
  * 
  * This program is free software; you can redistribute it and/or modify it 
  * under the terms of version 2 of the GNU General Public License 
@@ -50,14 +50,16 @@ void sn_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 			     LED_CPU_HEARTBEAT, LED_CPU_HEARTBEAT);
 	}
 
-	if (enable_shub_wars_1_1()) {
-		/* Bugfix code for SHUB 1.1 */
-		if (pda->pio_shub_war_cam_addr)
-			*pda->pio_shub_war_cam_addr = 0x8000000000000010UL;
+	if (is_shub1()) {
+		if (enable_shub_wars_1_1()) {
+			/* Bugfix code for SHUB 1.1 */
+			if (pda->pio_shub_war_cam_addr)
+				*pda->pio_shub_war_cam_addr = 0x8000000000000010UL;
+		}
+		if (pda->sn_lb_int_war_ticks == 0)
+			sn_lb_int_war_check();
+		pda->sn_lb_int_war_ticks++;
+		if (pda->sn_lb_int_war_ticks >= SN_LB_INT_WAR_INTERVAL)
+			pda->sn_lb_int_war_ticks = 0;
 	}
-	if (pda->sn_lb_int_war_ticks == 0)
-		sn_lb_int_war_check();
-	pda->sn_lb_int_war_ticks++;
-	if (pda->sn_lb_int_war_ticks >= SN_LB_INT_WAR_INTERVAL)
-		pda->sn_lb_int_war_ticks = 0;
 }
diff --git a/arch/ia64/sn/pci/Makefile b/arch/ia64/sn/pci/Makefile
index 2f915bc..321576b 100644
--- a/arch/ia64/sn/pci/Makefile
+++ b/arch/ia64/sn/pci/Makefile
@@ -7,4 +7,4 @@
 #
 # Makefile for the sn pci general routines.
 
-obj-y := pci_dma.o tioca_provider.o pcibr/ 
+obj-y := pci_dma.o tioca_provider.o tioce_provider.o pcibr/
diff --git a/arch/ia64/sn/pci/pcibr/pcibr_dma.c b/arch/ia64/sn/pci/pcibr/pcibr_dma.c
index b058dc2..3409347 100644
--- a/arch/ia64/sn/pci/pcibr/pcibr_dma.c
+++ b/arch/ia64/sn/pci/pcibr/pcibr_dma.c
@@ -3,7 +3,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2001-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2001-2005 Silicon Graphics, Inc. All rights reserved.
  */
 
 #include <linux/types.h>
@@ -215,8 +215,8 @@ void sn_dma_flush(uint64_t addr)
 	int is_tio;
 	int wid_num;
 	int i, j;
-	int bwin;
 	uint64_t flags;
+	uint64_t itte;
 	struct hubdev_info *hubinfo;
 	volatile struct sn_flush_device_list *p;
 	struct sn_flush_nasid_entry *flush_nasid_list;
@@ -233,31 +233,36 @@ void sn_dma_flush(uint64_t addr)
 	if (!hubinfo) {
 		BUG();
 	}
-	is_tio = (nasid & 1);
-	if (is_tio) {
-		wid_num = TIO_SWIN_WIDGETNUM(addr);
-		bwin = TIO_BWIN_WINDOWNUM(addr);
-	} else {
-		wid_num = SWIN_WIDGETNUM(addr);
-		bwin = BWIN_WINDOWNUM(addr);
-	}
 
 	flush_nasid_list = &hubinfo->hdi_flush_nasid_list;
 	if (flush_nasid_list->widget_p == NULL)
 		return;
-	if (bwin > 0) {
-		uint64_t itte = flush_nasid_list->iio_itte[bwin];
 
-		if (is_tio) {
-			wid_num = (itte >> TIO_ITTE_WIDGET_SHIFT) &
-			    TIO_ITTE_WIDGET_MASK;
-		} else {
-			wid_num = (itte >> IIO_ITTE_WIDGET_SHIFT) &
-			    IIO_ITTE_WIDGET_MASK;
-		}
+	is_tio = (nasid & 1);
+	if (is_tio) {
+		int itte_index;
+
+		if (TIO_HWIN(addr))
+			itte_index = 0;
+		else if (TIO_BWIN_WINDOWNUM(addr))
+			itte_index = TIO_BWIN_WINDOWNUM(addr);
+		else
+			itte_index = -1;
+
+		if (itte_index >= 0) {
+			itte = flush_nasid_list->iio_itte[itte_index];
+			if (! TIO_ITTE_VALID(itte))
+				return;
+			wid_num = TIO_ITTE_WIDGET(itte);
+		} else
+			wid_num = TIO_SWIN_WIDGETNUM(addr);
+	} else {
+		if (BWIN_WINDOWNUM(addr)) {
+			itte = flush_nasid_list->iio_itte[BWIN_WINDOWNUM(addr)];
+			wid_num = IIO_ITTE_WIDGET(itte);
+		} else
+			wid_num = SWIN_WIDGETNUM(addr);
 	}
-	if (flush_nasid_list->widget_p == NULL)
-		return;
 	if (flush_nasid_list->widget_p[wid_num] == NULL)
 		return;
 	p = &flush_nasid_list->widget_p[wid_num][0];
@@ -283,10 +288,16 @@ void sn_dma_flush(uint64_t addr)
 	/*
 	 * For TIOCP use the Device(x) Write Request Buffer Flush Bridge
 	 * register since it ensures the data has entered the coherence
-	 * domain, unlike PIC
+	 * domain, unlike PIC.
 	 */
 	if (is_tio) {
-		uint32_t tio_id = REMOTE_HUB_L(nasid, TIO_NODE_ID);
+		/*
+	 	 * Note:  devices behind TIOCE should never be matched in the
+		 * above code, and so the following code is PIC/CP centric.
+		 * If CE ever needs the sn_dma_flush mechanism, we will have
+		 * to account for that here and in tioce_bus_fixup().
+	 	 */
+		uint32_t tio_id = HUB_L(TIO_IOSPACE_ADDR(nasid, TIO_NODE_ID));
 		uint32_t revnum = XWIDGET_PART_REV_NUM(tio_id);
 
 		/* TIOCP BRINGUP WAR (PV907516): Don't write buffer flush reg */
@@ -306,7 +317,8 @@ void sn_dma_flush(uint64_t addr)
 		*(volatile uint32_t *)(p->sfdl_force_int_addr) = 1;
 
 		/* wait for the interrupt to come back. */
-		while (*(p->sfdl_flush_addr) != 0x10f) ;
+		while (*(p->sfdl_flush_addr) != 0x10f)
+			cpu_relax();
 
 		/* okay, everything is synched up. */
 		spin_unlock_irqrestore((spinlock_t *)&p->sfdl_flush_lock, flags);
diff --git a/arch/ia64/sn/pci/pcibr/pcibr_provider.c b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
index b95e928..7b03b80 100644
--- a/arch/ia64/sn/pci/pcibr/pcibr_provider.c
+++ b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
@@ -15,6 +15,7 @@
 #include <asm/sn/pcibus_provider_defs.h>
 #include <asm/sn/pcidev.h>
 #include <asm/sn/sn_sal.h>
+#include <asm/sn/sn2/sn_hwperf.h>
 #include "xtalk/xwidgetdev.h"
 #include "xtalk/hubdev.h"
 
@@ -60,7 +61,7 @@ static int sal_pcibr_error_interrupt(struct pcibus_info *soft)
 	ret_stuff.status = 0;
 	ret_stuff.v0 = 0;
 
-	segment = 0;
+	segment = soft->pbi_buscommon.bs_persist_segment;
 	busnum = soft->pbi_buscommon.bs_persist_busnum;
 	SAL_CALL_NOLOCK(ret_stuff,
 			(u64) SN_SAL_IOIF_ERROR_INTERRUPT,
@@ -88,6 +89,7 @@ void *
 pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *controller)
 {
 	int nasid, cnode, j;
+	cnodeid_t near_cnode;
 	struct hubdev_info *hubdev_info;
 	struct pcibus_info *soft;
 	struct sn_flush_device_list *sn_flush_device_list;
@@ -115,7 +117,7 @@ pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *cont
 	/*
 	 * register the bridge's error interrupt handler
 	 */
-	if (request_irq(SGI_PCIBR_ERROR, (void *)pcibr_error_intr_handler,
+	if (request_irq(SGI_PCIASIC_ERROR, (void *)pcibr_error_intr_handler,
 			SA_SHIRQ, "PCIBR error", (void *)(soft))) {
 		printk(KERN_WARNING
 		       "pcibr cannot allocate interrupt for error handler\n");
@@ -142,9 +144,12 @@ pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *cont
 			     j++, sn_flush_device_list++) {
 				if (sn_flush_device_list->sfdl_slot == -1)
 					continue;
-				if (sn_flush_device_list->
-				    sfdl_persistent_busnum ==
-				    soft->pbi_buscommon.bs_persist_busnum)
+				if ((sn_flush_device_list->
+				     sfdl_persistent_segment ==
+				     soft->pbi_buscommon.bs_persist_segment) &&
+				     (sn_flush_device_list->
+				     sfdl_persistent_busnum ==
+				     soft->pbi_buscommon.bs_persist_busnum))
 					sn_flush_device_list->sfdl_pcibus_info =
 					    soft;
 			}
@@ -158,12 +163,18 @@ pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *cont
 	memset(soft->pbi_int_ate_resource.ate, 0,
  	       (soft->pbi_int_ate_size * sizeof(uint64_t)));
 
-	if (prom_bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP)
-		/*
-		 * TIO PCI Bridge with no closest node information.
-		 * FIXME: Find another way to determine the closest node
-		 */
-		controller->node = -1;
+	if (prom_bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) {
+		/* TIO PCI Bridge: find nearest node with CPUs */
+		int e = sn_hwperf_get_nearest_node(cnode, NULL, &near_cnode);
+
+		if (e < 0) {
+			near_cnode = (cnodeid_t)-1; /* use any node */
+			printk(KERN_WARNING "pcibr_bus_fixup: failed to find "
+				"near node with CPUs to TIO node %d, err=%d\n",
+				cnode, e);
+		}
+		controller->node = near_cnode;
+	}
 	else
 		controller->node = cnode;
 	return soft;
@@ -175,6 +186,9 @@ void pcibr_force_interrupt(struct sn_irq_info *sn_irq_info)
 	struct pcibus_info *pcibus_info;
 	int bit = sn_irq_info->irq_int_bit;
 
+	if (! sn_irq_info->irq_bridge)
+		return;
+
 	pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
 	if (pcidev_info) {
 		pcibus_info =
@@ -184,7 +198,7 @@ void pcibr_force_interrupt(struct sn_irq_info *sn_irq_info)
 	}
 }
 
-void pcibr_change_devices_irq(struct sn_irq_info *sn_irq_info)
+void pcibr_target_interrupt(struct sn_irq_info *sn_irq_info)
 {
 	struct pcidev_info *pcidev_info;
 	struct pcibus_info *pcibus_info;
@@ -219,6 +233,8 @@ struct sn_pcibus_provider pcibr_provider = {
 	.dma_map_consistent = pcibr_dma_map_consistent,
 	.dma_unmap = pcibr_dma_unmap,
 	.bus_fixup = pcibr_bus_fixup,
+	.force_interrupt = pcibr_force_interrupt,
+	.target_interrupt = pcibr_target_interrupt
 };
 
 int
diff --git a/arch/ia64/sn/pci/tioca_provider.c b/arch/ia64/sn/pci/tioca_provider.c
index 5d76a75..ea09c12f 100644
--- a/arch/ia64/sn/pci/tioca_provider.c
+++ b/arch/ia64/sn/pci/tioca_provider.c
@@ -559,7 +559,7 @@ tioca_error_intr_handler(int irq, void *arg, struct pt_regs *pt)
 	ret_stuff.status = 0;
 	ret_stuff.v0 = 0;
 
-	segment = 0;
+	segment = soft->ca_common.bs_persist_segment;
 	busnum = soft->ca_common.bs_persist_busnum;
 
 	SAL_CALL_NOLOCK(ret_stuff,
@@ -622,7 +622,8 @@ tioca_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *cont
 	    nasid_to_cnodeid(tioca_common->ca_closest_nasid);
 	tioca_common->ca_kernel_private = (uint64_t) tioca_kern;
 
-	bus = pci_find_bus(0, tioca_common->ca_common.bs_persist_busnum);
+	bus = pci_find_bus(tioca_common->ca_common.bs_persist_segment,
+		tioca_common->ca_common.bs_persist_busnum);
 	BUG_ON(!bus);
 	tioca_kern->ca_devices = &bus->devices;
 
@@ -656,6 +657,8 @@ static struct sn_pcibus_provider tioca_pci_interfaces = {
 	.dma_map_consistent = tioca_dma_map,
 	.dma_unmap = tioca_dma_unmap,
 	.bus_fixup = tioca_bus_fixup,
+	.force_interrupt = NULL,
+	.target_interrupt = NULL
 };
 
 /**
diff --git a/arch/ia64/sn/pci/tioce_provider.c b/arch/ia64/sn/pci/tioce_provider.c
new file mode 100644
index 0000000..8e75db2
--- /dev/null
+++ b/arch/ia64/sn/pci/tioce_provider.c
@@ -0,0 +1,771 @@
+/*
+ * 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) 2003-2005 Silicon Graphics, Inc.  All Rights Reserved.
+ */
+
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <asm/sn/sn_sal.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/pcidev.h>
+#include <asm/sn/pcibus_provider_defs.h>
+#include <asm/sn/tioce_provider.h>
+
+/**
+ * Bus address ranges for the 5 flavors of TIOCE DMA
+ */
+
+#define TIOCE_D64_MIN	0x8000000000000000UL
+#define TIOCE_D64_MAX	0xffffffffffffffffUL
+#define TIOCE_D64_ADDR(a)	((a) >= TIOCE_D64_MIN)
+
+#define TIOCE_D32_MIN	0x0000000080000000UL
+#define TIOCE_D32_MAX	0x00000000ffffffffUL
+#define TIOCE_D32_ADDR(a)	((a) >= TIOCE_D32_MIN && (a) <= TIOCE_D32_MAX)
+
+#define TIOCE_M32_MIN	0x0000000000000000UL
+#define TIOCE_M32_MAX	0x000000007fffffffUL
+#define TIOCE_M32_ADDR(a)	((a) >= TIOCE_M32_MIN && (a) <= TIOCE_M32_MAX)
+
+#define TIOCE_M40_MIN	0x0000004000000000UL
+#define TIOCE_M40_MAX	0x0000007fffffffffUL
+#define TIOCE_M40_ADDR(a)	((a) >= TIOCE_M40_MIN && (a) <= TIOCE_M40_MAX)
+
+#define TIOCE_M40S_MIN	0x0000008000000000UL
+#define TIOCE_M40S_MAX	0x000000ffffffffffUL
+#define TIOCE_M40S_ADDR(a)	((a) >= TIOCE_M40S_MIN && (a) <= TIOCE_M40S_MAX)
+
+/*
+ * ATE manipulation macros.
+ */
+
+#define ATE_PAGESHIFT(ps)	(__ffs(ps))
+#define ATE_PAGEMASK(ps)	((ps)-1)
+
+#define ATE_PAGE(x, ps) ((x) >> ATE_PAGESHIFT(ps))
+#define ATE_NPAGES(start, len, pagesize) \
+	(ATE_PAGE((start)+(len)-1, pagesize) - ATE_PAGE(start, pagesize) + 1)
+
+#define ATE_VALID(ate)	((ate) & (1UL << 63))
+#define ATE_MAKE(addr, ps) (((addr) & ~ATE_PAGEMASK(ps)) | (1UL << 63))
+
+/*
+ * Flavors of ate-based mapping supported by tioce_alloc_map()
+ */
+
+#define TIOCE_ATE_M32	1
+#define TIOCE_ATE_M40	2
+#define TIOCE_ATE_M40S	3
+
+#define KB(x)	((x) << 10)
+#define MB(x)	((x) << 20)
+#define GB(x)	((x) << 30)
+
+/**
+ * tioce_dma_d64 - create a DMA mapping using 64-bit direct mode
+ * @ct_addr: system coretalk address
+ *
+ * Map @ct_addr into 64-bit CE bus space.  No device context is necessary
+ * and no CE mapping are consumed.
+ *
+ * Bits 53:0 come from the coretalk address.  The remaining bits are set as
+ * follows:
+ *
+ * 63    - must be 1 to indicate d64 mode to CE hardware
+ * 62    - barrier bit ... controlled with tioce_dma_barrier()
+ * 61    - 0 since this is not an MSI transaction
+ * 60:54 - reserved, MBZ
+ */
+static uint64_t
+tioce_dma_d64(unsigned long ct_addr)
+{
+	uint64_t bus_addr;
+
+	bus_addr = ct_addr | (1UL << 63);
+
+	return bus_addr;
+}
+
+/**
+ * pcidev_to_tioce - return misc ce related pointers given a pci_dev
+ * @pci_dev: pci device context
+ * @base: ptr to store struct tioce_mmr * for the CE holding this device
+ * @kernel: ptr to store struct tioce_kernel * for the CE holding this device
+ * @port: ptr to store the CE port number that this device is on
+ *
+ * Return pointers to various CE-related structures for the CE upstream of
+ * @pci_dev.
+ */
+static inline void
+pcidev_to_tioce(struct pci_dev *pdev, struct tioce **base,
+		struct tioce_kernel **kernel, int *port)
+{
+	struct pcidev_info *pcidev_info;
+	struct tioce_common *ce_common;
+	struct tioce_kernel *ce_kernel;
+
+	pcidev_info = SN_PCIDEV_INFO(pdev);
+	ce_common = (struct tioce_common *)pcidev_info->pdi_pcibus_info;
+	ce_kernel = (struct tioce_kernel *)ce_common->ce_kernel_private;
+
+	if (base)
+		*base = (struct tioce *)ce_common->ce_pcibus.bs_base;
+	if (kernel)
+		*kernel = ce_kernel;
+
+	/*
+	 * we use port as a zero-based value internally, even though the
+	 * documentation is 1-based.
+	 */
+	if (port)
+		*port =
+		    (pdev->bus->number < ce_kernel->ce_port1_secondary) ? 0 : 1;
+}
+
+/**
+ * tioce_alloc_map - Given a coretalk address, map it to pcie bus address
+ * space using one of the various ATE-based address modes.
+ * @ce_kern: tioce context
+ * @type: map mode to use
+ * @port: 0-based port that the requesting device is downstream of
+ * @ct_addr: the coretalk address to map
+ * @len: number of bytes to map
+ *
+ * Given the addressing type, set up various paramaters that define the
+ * ATE pool to use.  Search for a contiguous block of entries to cover the
+ * length, and if enough resources exist, fill in the ATE's and construct a
+ * tioce_dmamap struct to track the mapping.
+ */
+static uint64_t
+tioce_alloc_map(struct tioce_kernel *ce_kern, int type, int port,
+		uint64_t ct_addr, int len)
+{
+	int i;
+	int j;
+	int first;
+	int last;
+	int entries;
+	int nates;
+	int pagesize;
+	uint64_t *ate_shadow;
+	uint64_t *ate_reg;
+	uint64_t addr;
+	struct tioce *ce_mmr;
+	uint64_t bus_base;
+	struct tioce_dmamap *map;
+
+	ce_mmr = (struct tioce *)ce_kern->ce_common->ce_pcibus.bs_base;
+
+	switch (type) {
+	case TIOCE_ATE_M32:
+		/*
+		 * The first 64 entries of the ate3240 pool are dedicated to
+		 * super-page (TIOCE_ATE_M40S) mode.
+		 */
+		first = 64;
+		entries = TIOCE_NUM_M3240_ATES - 64;
+		ate_shadow = ce_kern->ce_ate3240_shadow;
+		ate_reg = ce_mmr->ce_ure_ate3240;
+		pagesize = ce_kern->ce_ate3240_pagesize;
+		bus_base = TIOCE_M32_MIN;
+		break;
+	case TIOCE_ATE_M40:
+		first = 0;
+		entries = TIOCE_NUM_M40_ATES;
+		ate_shadow = ce_kern->ce_ate40_shadow;
+		ate_reg = ce_mmr->ce_ure_ate40;
+		pagesize = MB(64);
+		bus_base = TIOCE_M40_MIN;
+		break;
+	case TIOCE_ATE_M40S:
+		/*
+		 * ate3240 entries 0-31 are dedicated to port1 super-page
+		 * mappings.  ate3240 entries 32-63 are dedicated to port2.
+		 */
+		first = port * 32;
+		entries = 32;
+		ate_shadow = ce_kern->ce_ate3240_shadow;
+		ate_reg = ce_mmr->ce_ure_ate3240;
+		pagesize = GB(16);
+		bus_base = TIOCE_M40S_MIN;
+		break;
+	default:
+		return 0;
+	}
+
+	nates = ATE_NPAGES(ct_addr, len, pagesize);
+	if (nates > entries)
+		return 0;
+
+	last = first + entries - nates;
+	for (i = first; i <= last; i++) {
+		if (ATE_VALID(ate_shadow[i]))
+			continue;
+
+		for (j = i; j < i + nates; j++)
+			if (ATE_VALID(ate_shadow[j]))
+				break;
+
+		if (j >= i + nates)
+			break;
+	}
+
+	if (i > last)
+		return 0;
+
+	map = kcalloc(1, sizeof(struct tioce_dmamap), GFP_ATOMIC);
+	if (!map)
+		return 0;
+
+	addr = ct_addr;
+	for (j = 0; j < nates; j++) {
+		uint64_t ate;
+
+		ate = ATE_MAKE(addr, pagesize);
+		ate_shadow[i + j] = ate;
+		ate_reg[i + j] = ate;
+		addr += pagesize;
+	}
+
+	map->refcnt = 1;
+	map->nbytes = nates * pagesize;
+	map->ct_start = ct_addr & ~ATE_PAGEMASK(pagesize);
+	map->pci_start = bus_base + (i * pagesize);
+	map->ate_hw = &ate_reg[i];
+	map->ate_shadow = &ate_shadow[i];
+	map->ate_count = nates;
+
+	list_add(&map->ce_dmamap_list, &ce_kern->ce_dmamap_list);
+
+	return (map->pci_start + (ct_addr - map->ct_start));
+}
+
+/**
+ * tioce_dma_d32 - create a DMA mapping using 32-bit direct mode
+ * @pdev: linux pci_dev representing the function
+ * @paddr: system physical address
+ *
+ * Map @paddr into 32-bit bus space of the CE associated with @pcidev_info.
+ */
+static uint64_t
+tioce_dma_d32(struct pci_dev *pdev, uint64_t ct_addr)
+{
+	int dma_ok;
+	int port;
+	struct tioce *ce_mmr;
+	struct tioce_kernel *ce_kern;
+	uint64_t ct_upper;
+	uint64_t ct_lower;
+	dma_addr_t bus_addr;
+
+	ct_upper = ct_addr & ~0x3fffffffUL;
+	ct_lower = ct_addr & 0x3fffffffUL;
+
+	pcidev_to_tioce(pdev, &ce_mmr, &ce_kern, &port);
+
+	if (ce_kern->ce_port[port].dirmap_refcnt == 0) {
+		volatile uint64_t tmp;
+
+		ce_kern->ce_port[port].dirmap_shadow = ct_upper;
+		ce_mmr->ce_ure_dir_map[port] = ct_upper;
+		tmp = ce_mmr->ce_ure_dir_map[port];
+		dma_ok = 1;
+	} else
+		dma_ok = (ce_kern->ce_port[port].dirmap_shadow == ct_upper);
+
+	if (dma_ok) {
+		ce_kern->ce_port[port].dirmap_refcnt++;
+		bus_addr = TIOCE_D32_MIN + ct_lower;
+	} else
+		bus_addr = 0;
+
+	return bus_addr;
+}
+
+/**
+ * tioce_dma_barrier - swizzle a TIOCE bus address to include or exclude
+ * the barrier bit.
+ * @bus_addr:  bus address to swizzle
+ *
+ * Given a TIOCE bus address, set the appropriate bit to indicate barrier
+ * attributes.
+ */
+static uint64_t
+tioce_dma_barrier(uint64_t bus_addr, int on)
+{
+	uint64_t barrier_bit;
+
+	/* barrier not supported in M40/M40S mode */
+	if (TIOCE_M40_ADDR(bus_addr) || TIOCE_M40S_ADDR(bus_addr))
+		return bus_addr;
+
+	if (TIOCE_D64_ADDR(bus_addr))
+		barrier_bit = (1UL << 62);
+	else			/* must be m32 or d32 */
+		barrier_bit = (1UL << 30);
+
+	return (on) ? (bus_addr | barrier_bit) : (bus_addr & ~barrier_bit);
+}
+
+/**
+ * tioce_dma_unmap - release CE mapping resources
+ * @pdev: linux pci_dev representing the function
+ * @bus_addr: bus address returned by an earlier tioce_dma_map
+ * @dir: mapping direction (unused)
+ *
+ * Locate mapping resources associated with @bus_addr and release them.
+ * For mappings created using the direct modes there are no resources
+ * to release.
+ */
+void
+tioce_dma_unmap(struct pci_dev *pdev, dma_addr_t bus_addr, int dir)
+{
+	int i;
+	int port;
+	struct tioce_kernel *ce_kern;
+	struct tioce *ce_mmr;
+	unsigned long flags;
+
+	bus_addr = tioce_dma_barrier(bus_addr, 0);
+	pcidev_to_tioce(pdev, &ce_mmr, &ce_kern, &port);
+
+	/* nothing to do for D64 */
+
+	if (TIOCE_D64_ADDR(bus_addr))
+		return;
+
+	spin_lock_irqsave(&ce_kern->ce_lock, flags);
+
+	if (TIOCE_D32_ADDR(bus_addr)) {
+		if (--ce_kern->ce_port[port].dirmap_refcnt == 0) {
+			ce_kern->ce_port[port].dirmap_shadow = 0;
+			ce_mmr->ce_ure_dir_map[port] = 0;
+		}
+	} else {
+		struct tioce_dmamap *map;
+
+		list_for_each_entry(map, &ce_kern->ce_dmamap_list,
+				    ce_dmamap_list) {
+			uint64_t last;
+
+			last = map->pci_start + map->nbytes - 1;
+			if (bus_addr >= map->pci_start && bus_addr <= last)
+				break;
+		}
+
+		if (&map->ce_dmamap_list == &ce_kern->ce_dmamap_list) {
+			printk(KERN_WARNING
+			       "%s:  %s - no map found for bus_addr 0x%lx\n",
+			       __FUNCTION__, pci_name(pdev), bus_addr);
+		} else if (--map->refcnt == 0) {
+			for (i = 0; i < map->ate_count; i++) {
+				map->ate_shadow[i] = 0;
+				map->ate_hw[i] = 0;
+			}
+
+			list_del(&map->ce_dmamap_list);
+			kfree(map);
+		}
+	}
+
+	spin_unlock_irqrestore(&ce_kern->ce_lock, flags);
+}
+
+/**
+ * tioce_do_dma_map - map pages for PCI DMA
+ * @pdev: linux pci_dev representing the function
+ * @paddr: host physical address to map
+ * @byte_count: bytes to map
+ *
+ * This is the main wrapper for mapping host physical pages to CE PCI space.
+ * The mapping mode used is based on the device's dma_mask.
+ */
+static uint64_t
+tioce_do_dma_map(struct pci_dev *pdev, uint64_t paddr, size_t byte_count,
+		 int barrier)
+{
+	unsigned long flags;
+	uint64_t ct_addr;
+	uint64_t mapaddr = 0;
+	struct tioce_kernel *ce_kern;
+	struct tioce_dmamap *map;
+	int port;
+	uint64_t dma_mask;
+
+	dma_mask = (barrier) ? pdev->dev.coherent_dma_mask : pdev->dma_mask;
+
+	/* cards must be able to address at least 31 bits */
+	if (dma_mask < 0x7fffffffUL)
+		return 0;
+
+	ct_addr = PHYS_TO_TIODMA(paddr);
+
+	/*
+	 * If the device can generate 64 bit addresses, create a D64 map.
+	 * Since this should never fail, bypass the rest of the checks.
+	 */
+	if (dma_mask == ~0UL) {
+		mapaddr = tioce_dma_d64(ct_addr);
+		goto dma_map_done;
+	}
+
+	pcidev_to_tioce(pdev, NULL, &ce_kern, &port);
+
+	spin_lock_irqsave(&ce_kern->ce_lock, flags);
+
+	/*
+	 * D64 didn't work ... See if we have an existing map that covers
+	 * this address range.  Must account for devices dma_mask here since
+	 * an existing map might have been done in a mode using more pci
+	 * address bits than this device can support.
+	 */
+	list_for_each_entry(map, &ce_kern->ce_dmamap_list, ce_dmamap_list) {
+		uint64_t last;
+
+		last = map->ct_start + map->nbytes - 1;
+		if (ct_addr >= map->ct_start &&
+		    ct_addr + byte_count - 1 <= last &&
+		    map->pci_start <= dma_mask) {
+			map->refcnt++;
+			mapaddr = map->pci_start + (ct_addr - map->ct_start);
+			break;
+		}
+	}
+
+	/*
+	 * If we don't have a map yet, and the card can generate 40
+	 * bit addresses, try the M40/M40S modes.  Note these modes do not
+	 * support a barrier bit, so if we need a consistent map these
+	 * won't work.
+	 */
+	if (!mapaddr && !barrier && dma_mask >= 0xffffffffffUL) {
+		/*
+		 * We have two options for 40-bit mappings:  16GB "super" ATE's
+		 * and 64MB "regular" ATE's.  We'll try both if needed for a
+		 * given mapping but which one we try first depends on the
+		 * size.  For requests >64MB, prefer to use a super page with
+		 * regular as the fallback. Otherwise, try in the reverse order.
+		 */
+
+		if (byte_count > MB(64)) {
+			mapaddr = tioce_alloc_map(ce_kern, TIOCE_ATE_M40S,
+						  port, ct_addr, byte_count);
+			if (!mapaddr)
+				mapaddr =
+				    tioce_alloc_map(ce_kern, TIOCE_ATE_M40, -1,
+						    ct_addr, byte_count);
+		} else {
+			mapaddr = tioce_alloc_map(ce_kern, TIOCE_ATE_M40, -1,
+						  ct_addr, byte_count);
+			if (!mapaddr)
+				mapaddr =
+				    tioce_alloc_map(ce_kern, TIOCE_ATE_M40S,
+						    port, ct_addr, byte_count);
+		}
+	}
+
+	/*
+	 * 32-bit direct is the next mode to try
+	 */
+	if (!mapaddr && dma_mask >= 0xffffffffUL)
+		mapaddr = tioce_dma_d32(pdev, ct_addr);
+
+	/*
+	 * Last resort, try 32-bit ATE-based map.
+	 */
+	if (!mapaddr)
+		mapaddr =
+		    tioce_alloc_map(ce_kern, TIOCE_ATE_M32, -1, ct_addr,
+				    byte_count);
+
+	spin_unlock_irqrestore(&ce_kern->ce_lock, flags);
+
+dma_map_done:
+	if (mapaddr & barrier)
+		mapaddr = tioce_dma_barrier(mapaddr, 1);
+
+	return mapaddr;
+}
+
+/**
+ * tioce_dma - standard pci dma map interface
+ * @pdev: pci device requesting the map
+ * @paddr: system physical address to map into pci space
+ * @byte_count: # bytes to map
+ *
+ * Simply call tioce_do_dma_map() to create a map with the barrier bit clear
+ * in the address.
+ */
+static uint64_t
+tioce_dma(struct pci_dev *pdev, uint64_t paddr, size_t byte_count)
+{
+	return tioce_do_dma_map(pdev, paddr, byte_count, 0);
+}
+
+/**
+ * tioce_dma_consistent - consistent pci dma map interface
+ * @pdev: pci device requesting the map
+ * @paddr: system physical address to map into pci space
+ * @byte_count: # bytes to map
+ *
+ * Simply call tioce_do_dma_map() to create a map with the barrier bit set
+ * in the address.
+ */ static uint64_t
+tioce_dma_consistent(struct pci_dev *pdev, uint64_t paddr, size_t byte_count)
+{
+	return tioce_do_dma_map(pdev, paddr, byte_count, 1);
+}
+
+/**
+ * tioce_error_intr_handler - SGI TIO CE error interrupt handler
+ * @irq: unused
+ * @arg: pointer to tioce_common struct for the given CE
+ * @pt: unused
+ *
+ * Handle a CE error interrupt.  Simply a wrapper around a SAL call which
+ * defers processing to the SGI prom.
+ */ static irqreturn_t
+tioce_error_intr_handler(int irq, void *arg, struct pt_regs *pt)
+{
+	struct tioce_common *soft = arg;
+	struct ia64_sal_retval ret_stuff;
+	ret_stuff.status = 0;
+	ret_stuff.v0 = 0;
+
+	SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_ERROR_INTERRUPT,
+			soft->ce_pcibus.bs_persist_segment,
+			soft->ce_pcibus.bs_persist_busnum, 0, 0, 0, 0, 0);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * tioce_kern_init - init kernel structures related to a given TIOCE
+ * @tioce_common: ptr to a cached tioce_common struct that originated in prom
+ */ static struct tioce_kernel *
+tioce_kern_init(struct tioce_common *tioce_common)
+{
+	int i;
+	uint32_t tmp;
+	struct tioce *tioce_mmr;
+	struct tioce_kernel *tioce_kern;
+
+	tioce_kern = kcalloc(1, sizeof(struct tioce_kernel), GFP_KERNEL);
+	if (!tioce_kern) {
+		return NULL;
+	}
+
+	tioce_kern->ce_common = tioce_common;
+	spin_lock_init(&tioce_kern->ce_lock);
+	INIT_LIST_HEAD(&tioce_kern->ce_dmamap_list);
+	tioce_common->ce_kernel_private = (uint64_t) tioce_kern;
+
+	/*
+	 * Determine the secondary bus number of the port2 logical PPB.
+	 * This is used to decide whether a given pci device resides on
+	 * port1 or port2.  Note:  We don't have enough plumbing set up
+	 * here to use pci_read_config_xxx() so use the raw_pci_ops vector.
+	 */
+
+	raw_pci_ops->read(tioce_common->ce_pcibus.bs_persist_segment,
+			  tioce_common->ce_pcibus.bs_persist_busnum,
+			  PCI_DEVFN(2, 0), PCI_SECONDARY_BUS, 1, &tmp);
+	tioce_kern->ce_port1_secondary = (uint8_t) tmp;
+
+	/*
+	 * Set PMU pagesize to the largest size available, and zero out
+	 * the ate's.
+	 */
+
+	tioce_mmr = (struct tioce *)tioce_common->ce_pcibus.bs_base;
+	tioce_mmr->ce_ure_page_map &= ~CE_URE_PAGESIZE_MASK;
+	tioce_mmr->ce_ure_page_map |= CE_URE_256K_PAGESIZE;
+	tioce_kern->ce_ate3240_pagesize = KB(256);
+
+	for (i = 0; i < TIOCE_NUM_M40_ATES; i++) {
+		tioce_kern->ce_ate40_shadow[i] = 0;
+		tioce_mmr->ce_ure_ate40[i] = 0;
+	}
+
+	for (i = 0; i < TIOCE_NUM_M3240_ATES; i++) {
+		tioce_kern->ce_ate3240_shadow[i] = 0;
+		tioce_mmr->ce_ure_ate3240[i] = 0;
+	}
+
+	return tioce_kern;
+}
+
+/**
+ * tioce_force_interrupt - implement altix force_interrupt() backend for CE
+ * @sn_irq_info: sn asic irq that we need an interrupt generated for
+ *
+ * Given an sn_irq_info struct, set the proper bit in ce_adm_force_int to
+ * force a secondary interrupt to be generated.  This is to work around an
+ * asic issue where there is a small window of opportunity for a legacy device
+ * interrupt to be lost.
+ */
+static void
+tioce_force_interrupt(struct sn_irq_info *sn_irq_info)
+{
+	struct pcidev_info *pcidev_info;
+	struct tioce_common *ce_common;
+	struct tioce *ce_mmr;
+	uint64_t force_int_val;
+
+	if (!sn_irq_info->irq_bridge)
+		return;
+
+	if (sn_irq_info->irq_bridge_type != PCIIO_ASIC_TYPE_TIOCE)
+		return;
+
+	pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
+	if (!pcidev_info)
+		return;
+
+	ce_common = (struct tioce_common *)pcidev_info->pdi_pcibus_info;
+	ce_mmr = (struct tioce *)ce_common->ce_pcibus.bs_base;
+
+	/*
+	 * irq_int_bit is originally set up by prom, and holds the interrupt
+	 * bit shift (not mask) as defined by the bit definitions in the
+	 * ce_adm_int mmr.  These shifts are not the same for the
+	 * ce_adm_force_int register, so do an explicit mapping here to make
+	 * things clearer.
+	 */
+
+	switch (sn_irq_info->irq_int_bit) {
+	case CE_ADM_INT_PCIE_PORT1_DEV_A_SHFT:
+		force_int_val = 1UL << CE_ADM_FORCE_INT_PCIE_PORT1_DEV_A_SHFT;
+		break;
+	case CE_ADM_INT_PCIE_PORT1_DEV_B_SHFT:
+		force_int_val = 1UL << CE_ADM_FORCE_INT_PCIE_PORT1_DEV_B_SHFT;
+		break;
+	case CE_ADM_INT_PCIE_PORT1_DEV_C_SHFT:
+		force_int_val = 1UL << CE_ADM_FORCE_INT_PCIE_PORT1_DEV_C_SHFT;
+		break;
+	case CE_ADM_INT_PCIE_PORT1_DEV_D_SHFT:
+		force_int_val = 1UL << CE_ADM_FORCE_INT_PCIE_PORT1_DEV_D_SHFT;
+		break;
+	case CE_ADM_INT_PCIE_PORT2_DEV_A_SHFT:
+		force_int_val = 1UL << CE_ADM_FORCE_INT_PCIE_PORT2_DEV_A_SHFT;
+		break;
+	case CE_ADM_INT_PCIE_PORT2_DEV_B_SHFT:
+		force_int_val = 1UL << CE_ADM_FORCE_INT_PCIE_PORT2_DEV_B_SHFT;
+		break;
+	case CE_ADM_INT_PCIE_PORT2_DEV_C_SHFT:
+		force_int_val = 1UL << CE_ADM_FORCE_INT_PCIE_PORT2_DEV_C_SHFT;
+		break;
+	case CE_ADM_INT_PCIE_PORT2_DEV_D_SHFT:
+		force_int_val = 1UL << CE_ADM_FORCE_INT_PCIE_PORT2_DEV_D_SHFT;
+		break;
+	default:
+		return;
+	}
+	ce_mmr->ce_adm_force_int = force_int_val;
+}
+
+/**
+ * tioce_target_interrupt - implement set_irq_affinity for tioce resident
+ * functions.  Note:  only applies to line interrupts, not MSI's.
+ *
+ * @sn_irq_info: SN IRQ context
+ *
+ * Given an sn_irq_info, set the associated CE device's interrupt destination
+ * register.  Since the interrupt destination registers are on a per-ce-slot
+ * basis, this will retarget line interrupts for all functions downstream of
+ * the slot.
+ */
+static void
+tioce_target_interrupt(struct sn_irq_info *sn_irq_info)
+{
+	struct pcidev_info *pcidev_info;
+	struct tioce_common *ce_common;
+	struct tioce *ce_mmr;
+	int bit;
+
+	pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
+	if (!pcidev_info)
+		return;
+
+	ce_common = (struct tioce_common *)pcidev_info->pdi_pcibus_info;
+	ce_mmr = (struct tioce *)ce_common->ce_pcibus.bs_base;
+
+	bit = sn_irq_info->irq_int_bit;
+
+	ce_mmr->ce_adm_int_mask |= (1UL << bit);
+	ce_mmr->ce_adm_int_dest[bit] =
+		((uint64_t)sn_irq_info->irq_irq << INTR_VECTOR_SHFT) |
+			   sn_irq_info->irq_xtalkaddr;
+	ce_mmr->ce_adm_int_mask &= ~(1UL << bit);
+
+	tioce_force_interrupt(sn_irq_info);
+}
+
+/**
+ * tioce_bus_fixup - perform final PCI fixup for a TIO CE bus
+ * @prom_bussoft: Common prom/kernel struct representing the bus
+ *
+ * Replicates the tioce_common pointed to by @prom_bussoft in kernel
+ * space.  Allocates and initializes a kernel-only area for a given CE,
+ * and sets up an irq for handling CE error interrupts.
+ *
+ * On successful setup, returns the kernel version of tioce_common back to
+ * the caller.
+ */
+static void *
+tioce_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *controller)
+{
+	struct tioce_common *tioce_common;
+
+	/*
+	 * Allocate kernel bus soft and copy from prom.
+	 */
+
+	tioce_common = kcalloc(1, sizeof(struct tioce_common), GFP_KERNEL);
+	if (!tioce_common)
+		return NULL;
+
+	memcpy(tioce_common, prom_bussoft, sizeof(struct tioce_common));
+	tioce_common->ce_pcibus.bs_base |= __IA64_UNCACHED_OFFSET;
+
+	if (tioce_kern_init(tioce_common) == NULL) {
+		kfree(tioce_common);
+		return NULL;
+	}
+
+	if (request_irq(SGI_PCIASIC_ERROR,
+			tioce_error_intr_handler,
+			SA_SHIRQ, "TIOCE error", (void *)tioce_common))
+		printk(KERN_WARNING
+		       "%s:  Unable to get irq %d.  "
+		       "Error interrupts won't be routed for "
+		       "TIOCE bus %04x:%02x\n",
+		       __FUNCTION__, SGI_PCIASIC_ERROR,
+		       tioce_common->ce_pcibus.bs_persist_segment,
+		       tioce_common->ce_pcibus.bs_persist_busnum);
+
+	return tioce_common;
+}
+
+static struct sn_pcibus_provider tioce_pci_interfaces = {
+	.dma_map = tioce_dma,
+	.dma_map_consistent = tioce_dma_consistent,
+	.dma_unmap = tioce_dma_unmap,
+	.bus_fixup = tioce_bus_fixup,
+	.force_interrupt = tioce_force_interrupt,
+	.target_interrupt = tioce_target_interrupt
+};
+
+/**
+ * tioce_init_provider - init SN PCI provider ops for TIO CE
+ */
+int
+tioce_init_provider(void)
+{
+	sn_pci_provider[PCIIO_ASIC_TYPE_TIOCE] = &tioce_pci_interfaces;
+	return 0;
+}