11 files changed, 180 insertions, 210 deletions

diff --git a/arch/ia64/sn/kernel/Makefile b/arch/ia64/sn/kernel/Makefile
index 4351c4ff9845..3e9b4eea7418 100644
--- a/arch/ia64/sn/kernel/Makefile
+++ b/arch/ia64/sn/kernel/Makefile
@@ -7,6 +7,8 @@
 # Copyright (C) 1999,2001-2005 Silicon Graphics, Inc.  All Rights Reserved.
 #
 
+CPPFLAGS += -I$(srctree)/arch/ia64/sn/include
+
 obj-y                           += setup.o bte.o bte_error.o irq.o mca.o idle.o \
                                    huberror.o io_init.o iomv.o klconflib.o sn2/
 obj-$(CONFIG_IA64_GENERIC)      += machvec.o
diff --git a/arch/ia64/sn/kernel/bte.c b/arch/ia64/sn/kernel/bte.c
index dd73c0cb754b..1f11db470d90 100644
--- a/arch/ia64/sn/kernel/bte.c
+++ b/arch/ia64/sn/kernel/bte.c
@@ -3,7 +3,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (c) 2000-2005 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2000-2006 Silicon Graphics, Inc.  All Rights Reserved.
  */
 
 #include <linux/config.h>
@@ -186,18 +186,13 @@ 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));
+        notif_phys_addr = (u64)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));
-        BTE_PRINTKV(("IBDA = 0x%lx)\n", (TO_PHYS(dest))));
-        BTE_DEST_STORE(bte, TO_PHYS(dest));
+        BTE_PRINTKV(("IBSA = 0x%lx)\n", src));
+        BTE_SRC_STORE(bte, src);
+        BTE_PRINTKV(("IBDA = 0x%lx)\n", dest));
+        BTE_DEST_STORE(bte, dest);
 
         /* Set the notification register */
         BTE_PRINTKV(("IBNA = 0x%lx)\n", notif_phys_addr));
diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index a4c78152b336..3437c2390429 100644
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -208,7 +208,7 @@ static s64 sn_device_fixup_war(u64 nasid, u64 widget, int device,
  * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for
  *      each node in the system.
  */
-static void sn_fixup_ionodes(void)
+static void __init sn_fixup_ionodes(void)
 {
         struct sn_flush_device_kernel *sn_flush_device_kernel;
         struct sn_flush_device_kernel *dev_entry;
@@ -467,6 +467,13 @@ void sn_pci_fixup_slot(struct pci_dev *dev)
                 pcidev_info->pdi_sn_irq_info = NULL;
                 kfree(sn_irq_info);
         }
+
+        /*
+         * MSI currently not supported on altix.  Remove this when
+         * the MSI abstraction patches are integrated into the kernel
+         * (sometime after 2.6.16 releases)
+         */
+        dev->no_msi = 1;
 }
 
 /*
@@ -610,15 +617,15 @@ void sn_bus_store_sysdata(struct pci_dev *dev)
 void sn_bus_free_sysdata(void)
 {
         struct sysdata_el *element;
-        struct list_head *list;
+        struct list_head *list, *safe;
 
-sn_sysdata_free_start:
-        list_for_each(list, &sn_sysdata_list) {
+        list_for_each_safe(list, safe, &sn_sysdata_list) {
                 element = list_entry(list, struct sysdata_el, entry);
                 list_del(&element->entry);
+                list_del(&(((struct pcidev_info *)
+                             (element->sysdata))->pdi_list));
                 kfree(element->sysdata);
                 kfree(element);
-                goto sn_sysdata_free_start;
         }
         return;
 }
diff --git a/arch/ia64/sn/kernel/irq.c b/arch/ia64/sn/kernel/irq.c
index ec37084bdc17..c373113d073a 100644
--- a/arch/ia64/sn/kernel/irq.c
+++ b/arch/ia64/sn/kernel/irq.c
@@ -5,11 +5,12 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (c) 2000-2005 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2000-2006 Silicon Graphics, Inc.  All Rights Reserved.
  */
 
 #include <linux/irq.h>
 #include <linux/spinlock.h>
+#include <linux/init.h>
 #include <asm/sn/addrs.h>
 #include <asm/sn/arch.h>
 #include <asm/sn/intr.h>
@@ -76,17 +77,15 @@ static void sn_enable_irq(unsigned int irq)
 
 static void sn_ack_irq(unsigned int irq)
 {
-        u64 event_occurred, mask = 0;
+        u64 event_occurred, mask;
 
         irq = irq & 0xff;
-        event_occurred =
-            HUB_L((u64*)LOCAL_MMR_ADDR(SH_EVENT_OCCURRED));
+        event_occurred = HUB_L((u64*)LOCAL_MMR_ADDR(SH_EVENT_OCCURRED));
         mask = event_occurred & SH_ALL_INT_MASK;
-        HUB_S((u64*)LOCAL_MMR_ADDR(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);
+        move_native_irq(irq);
 }
 
 static void sn_end_irq(unsigned int irq)
@@ -219,9 +218,8 @@ static void register_intr_pda(struct sn_irq_info *sn_irq_info)
                 pdacpu(cpu)->sn_last_irq = irq;
         }
 
-        if (pdacpu(cpu)->sn_first_irq == 0 || pdacpu(cpu)->sn_first_irq > irq) {
+        if (pdacpu(cpu)->sn_first_irq == 0 || pdacpu(cpu)->sn_first_irq > irq)
                 pdacpu(cpu)->sn_first_irq = irq;
-        }
 }
 
 static void unregister_intr_pda(struct sn_irq_info *sn_irq_info)
@@ -289,7 +287,7 @@ void sn_irq_fixup(struct pci_dev *pci_dev, struct sn_irq_info *sn_irq_info)
         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);
+        register_intr_pda(sn_irq_info);
 }
 
 void sn_irq_unfixup(struct pci_dev *pci_dev)
@@ -301,7 +299,9 @@ void sn_irq_unfixup(struct pci_dev *pci_dev)
                 return;
 
         sn_irq_info = SN_PCIDEV_INFO(pci_dev)->pdi_sn_irq_info;
-        if (!sn_irq_info || !sn_irq_info->irq_irq) {
+        if (!sn_irq_info)
+                return;
+        if (!sn_irq_info->irq_irq) {
                 kfree(sn_irq_info);
                 return;
         }
@@ -419,7 +419,7 @@ void sn_lb_int_war_check(void)
         rcu_read_unlock();
 }
 
-void sn_irq_lh_init(void)
+void __init sn_irq_lh_init(void)
 {
         int i;
 
@@ -434,5 +434,4 @@ void sn_irq_lh_init(void)
 
                 INIT_LIST_HEAD(sn_irq_lh[i]);
         }
-
 }
diff --git a/arch/ia64/sn/kernel/klconflib.c b/arch/ia64/sn/kernel/klconflib.c
index 0f11a3299cd2..87682b48ef83 100644
--- a/arch/ia64/sn/kernel/klconflib.c
+++ b/arch/ia64/sn/kernel/klconflib.c
@@ -78,31 +78,30 @@ format_module_id(char *buffer, moduleid_t m, int fmt)
         position = MODULE_GET_BPOS(m);
 
         if ((fmt == MODULE_FORMAT_BRIEF) || (fmt == MODULE_FORMAT_LCD)) {
-            /* Brief module number format, eg. 002c15 */
+                /* Brief module number format, eg. 002c15 */
 
-            /* Decompress the rack number */
-            *buffer++ = '0' + RACK_GET_CLASS(rack);
-            *buffer++ = '0' + RACK_GET_GROUP(rack);
-            *buffer++ = '0' + RACK_GET_NUM(rack);
+                /* Decompress the rack number */
+                *buffer++ = '0' + RACK_GET_CLASS(rack);
+                *buffer++ = '0' + RACK_GET_GROUP(rack);
+                *buffer++ = '0' + RACK_GET_NUM(rack);
 
-            /* Add the brick type */
-            *buffer++ = brickchar;
+                /* Add the brick type */
+                *buffer++ = brickchar;
         }
         else if (fmt == MODULE_FORMAT_LONG) {
-            /* Fuller hwgraph format, eg. rack/002/bay/15 */
+                /* Fuller hwgraph format, eg. rack/002/bay/15 */
 
-            strcpy(buffer, "rack" "/");  buffer += strlen(buffer);
+                strcpy(buffer, "rack" "/");  buffer += strlen(buffer);
 
-            *buffer++ = '0' + RACK_GET_CLASS(rack);
-            *buffer++ = '0' + RACK_GET_GROUP(rack);
-            *buffer++ = '0' + RACK_GET_NUM(rack);
+                *buffer++ = '0' + RACK_GET_CLASS(rack);
+                *buffer++ = '0' + RACK_GET_GROUP(rack);
+                *buffer++ = '0' + RACK_GET_NUM(rack);
 
-            strcpy(buffer, "/" "bay" "/");  buffer += strlen(buffer);
+                strcpy(buffer, "/" "bay" "/");  buffer += strlen(buffer);
         }
 
         /* Add the bay position, using at least two digits */
         if (position < 10)
-            *buffer++ = '0';
+                *buffer++ = '0';
         sprintf(buffer, "%d", position);
-
 }
diff --git a/arch/ia64/sn/kernel/mca.c b/arch/ia64/sn/kernel/mca.c
index 9ab684d1bb55..3db62f24596c 100644
--- a/arch/ia64/sn/kernel/mca.c
+++ b/arch/ia64/sn/kernel/mca.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) 2000-2006 Silicon Graphics, Inc.  All Rights Reserved.
  */
 
 #include <linux/types.h>
@@ -137,7 +137,8 @@ int sn_salinfo_platform_oemdata(const u8 *sect_header, u8 **oemdata, u64 *oemdat
 
 static int __init sn_salinfo_init(void)
 {
-        salinfo_platform_oemdata = &sn_salinfo_platform_oemdata;
+        if (ia64_platform_is("sn2"))
+                salinfo_platform_oemdata = &sn_salinfo_platform_oemdata;
         return 0;
 }
 
diff --git a/arch/ia64/sn/kernel/setup.c b/arch/ia64/sn/kernel/setup.c
index e510dce9971f..48645ac120fc 100644
--- a/arch/ia64/sn/kernel/setup.c
+++ b/arch/ia64/sn/kernel/setup.c
@@ -67,6 +67,7 @@ extern unsigned long last_time_offset;
 extern void (*ia64_mark_idle) (int);
 extern void snidle(int);
 extern unsigned char acpi_kbd_controller_present;
+extern unsigned long long (*ia64_printk_clock)(void);
 
 unsigned long sn_rtc_cycles_per_second;
 EXPORT_SYMBOL(sn_rtc_cycles_per_second);
@@ -125,20 +126,6 @@ struct screen_info sn_screen_info = {
 };
 
 /*
- * This is here so we can use the CMOS detection in ide-probe.c to
- * determine what drives are present.  In theory, we don't need this
- * as the auto-detection could be done via ide-probe.c:do_probe() but
- * in practice that would be much slower, which is painful when
- * running in the simulator.  Note that passing zeroes in DRIVE_INFO
- * is sufficient (the IDE driver will autodetect the drive geometry).
- */
-#ifdef CONFIG_IA64_GENERIC
-extern char drive_info[4 * 16];
-#else
-char drive_info[4 * 16];
-#endif
-
-/*
  * This routine can only be used during init, since
  * smp_boot_data is an init data structure.
  * We have to use smp_boot_data.cpu_phys_id to find
@@ -209,7 +196,7 @@ void __init early_sn_setup(void)
 }
 
 extern int platform_intr_list[];
-static int __initdata shub_1_1_found = 0;
+static int __initdata shub_1_1_found;
 
 /*
  * sn_check_for_wars
@@ -372,6 +359,16 @@ sn_scan_pcdp(void)
         }
 }
 
+static unsigned long sn2_rtc_initial;
+
+static unsigned long long ia64_sn2_printk_clock(void)
+{
+        unsigned long rtc_now = rtc_time();
+
+        return (rtc_now - sn2_rtc_initial) *
+                (1000000000 / sn_rtc_cycles_per_second);
+}
+
 /**
  * sn_setup - SN platform setup routine
  * @cmdline_p: kernel command line
@@ -386,6 +383,7 @@ void __init sn_setup(char **cmdline_p)
         u32 version = sn_sal_rev();
         extern void sn_cpu_init(void);
 
+        sn2_rtc_initial = rtc_time();
         ia64_sn_plat_set_error_handling_features();     // obsolete
         ia64_sn_set_os_feature(OSF_MCA_SLV_TO_OS_INIT_SLV);
         ia64_sn_set_os_feature(OSF_FEAT_LOG_SBES);
@@ -437,19 +435,6 @@ void __init sn_setup(char **cmdline_p)
          */
         build_cnode_tables();
 
-        /*
-         * Old PROMs do not provide an ACPI FADT. Disable legacy keyboard
-         * support here so we don't have to listen to failed keyboard probe
-         * messages.
-         */
-        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", version >> 8, version & 0x00FF);
-
         status =
             ia64_sal_freq_base(SAL_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec,
                                &drift);
@@ -463,6 +448,21 @@ void __init sn_setup(char **cmdline_p)
 
         platform_intr_list[ACPI_INTERRUPT_CPEI] = IA64_CPE_VECTOR;
 
+        ia64_printk_clock = ia64_sn2_printk_clock;
+
+        /*
+         * Old PROMs do not provide an ACPI FADT. Disable legacy keyboard
+         * support here so we don't have to listen to failed keyboard probe
+         * messages.
+         */
+        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", version >> 8, version & 0x00FF);
+
         /*
          * we set the default root device to /dev/hda
          * to make simulation easy
@@ -578,13 +578,17 @@ void __init sn_cpu_init(void)
                         sn_prom_type = 2;
                 else
                         sn_prom_type = 1;
-                printk("Running on medusa with %s PROM\n", (sn_prom_type == 1) ? "real" : "fake");
+                printk(KERN_INFO "Running on medusa with %s PROM\n",
+                       (sn_prom_type == 1) ? "real" : "fake");
         }
 
         memset(pda, 0, sizeof(pda));
-        if (ia64_sn_get_sn_info(0, &sn_hub_info->shub2, &sn_hub_info->nasid_bitmask, &sn_hub_info->nasid_shift,
-                                &sn_system_size, &sn_sharing_domain_size, &sn_partition_id,
-                                &sn_coherency_id, &sn_region_size))
+        if (ia64_sn_get_sn_info(0, &sn_hub_info->shub2,
+                                &sn_hub_info->nasid_bitmask,
+                                &sn_hub_info->nasid_shift,
+                                &sn_system_size, &sn_sharing_domain_size,
+                                &sn_partition_id, &sn_coherency_id,
+                                &sn_region_size))
                 BUG();
         sn_hub_info->as_shift = sn_hub_info->nasid_shift - 2;
 
@@ -716,7 +720,8 @@ void __init build_cnode_tables(void)
         for_each_online_node(node) {
                 kl_config_hdr_t *klgraph_header;
                 nasid = cnodeid_to_nasid(node);
-                if ((klgraph_header = ia64_sn_get_klconfig_addr(nasid)) == NULL)
+                klgraph_header = ia64_sn_get_klconfig_addr(nasid);
+                if (klgraph_header == NULL)
                         BUG();
                 brd = NODE_OFFSET_TO_LBOARD(nasid, klgraph_header->ch_board_info);
                 while (brd) {
@@ -734,7 +739,7 @@ nasid_slice_to_cpuid(int nasid, int slice)
 {
         long cpu;
 
-        for (cpu=0; cpu < NR_CPUS; cpu++)
+        for (cpu = 0; cpu < NR_CPUS; cpu++)
                 if (cpuid_to_nasid(cpu) == nasid &&
                                         cpuid_to_slice(cpu) == slice)
                         return cpu;
diff --git a/arch/ia64/sn/kernel/sn2/Makefile b/arch/ia64/sn/kernel/sn2/Makefile
index 170bde4549da..99e177693234 100644
--- a/arch/ia64/sn/kernel/sn2/Makefile
+++ b/arch/ia64/sn/kernel/sn2/Makefile
@@ -9,5 +9,7 @@
 # sn2 specific kernel files
 #
 
+CPPFLAGS += -I$(srctree)/arch/ia64/sn/include
+
 obj-y += cache.o io.o ptc_deadlock.o sn2_smp.o sn_proc_fs.o \
          prominfo_proc.o timer.o timer_interrupt.o sn_hwperf.o
diff --git a/arch/ia64/sn/kernel/sn2/sn2_smp.c b/arch/ia64/sn/kernel/sn2/sn2_smp.c
index 471bbaa65d1b..f153a4c35c70 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) 2000-2005 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2000-2006 Silicon Graphics, Inc. All rights reserved.
  */
 
 #include <linux/init.h>
@@ -46,104 +46,28 @@ DECLARE_PER_CPU(struct ptc_stats, ptcstats);
 
 static  __cacheline_aligned DEFINE_SPINLOCK(sn2_global_ptc_lock);
 
-void sn2_ptc_deadlock_recovery(short *, short, int, volatile unsigned long *, unsigned long data0,
-        volatile unsigned long *, unsigned long data1);
+void sn2_ptc_deadlock_recovery(short *, short, short, int, volatile unsigned long *, unsigned long,
+        volatile unsigned long *, unsigned long);
 
-#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!
+ * Note: some is the following is captured here to make degugging easier
+ * (the macros make more sense if you see the debug patch - not posted)
  */
-
-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
+#define local_node_uses_ptc_ga(sh1)     ((sh1) ? 1 : 0)
+#define max_active_pio(sh1)             ((sh1) ? 32 : 7)
+#define reset_max_active_on_deadlock()  1
+#define PTC_LOCK(sh1)                   ((sh1) ? &sn2_global_ptc_lock : &sn_nodepda->ptc_lock)
 
-static inline int ptc_lock(unsigned long *flagp)
+static inline void ptc_lock(int sh1, unsigned long *flagp)
 {
-        spin_lock_irqsave(&sn2_global_ptc_lock, *flagp);
-        return 0;
+        spin_lock_irqsave(PTC_LOCK(sh1), *flagp);
 }
 
-static inline void ptc_unlock(unsigned long flags, int opt)
+static inline void ptc_unlock(int sh1, unsigned long flags)
 {
-        spin_unlock_irqrestore(&sn2_global_ptc_lock, flags);
+        spin_unlock_irqrestore(PTC_LOCK(sh1), flags);
 }
-#endif
 
 struct ptc_stats {
         unsigned long ptc_l;
@@ -151,27 +75,30 @@ struct ptc_stats {
         unsigned long shub_ptc_flushes;
         unsigned long nodes_flushed;
         unsigned long deadlocks;
+        unsigned long deadlocks2;
         unsigned long lock_itc_clocks;
         unsigned long shub_itc_clocks;
         unsigned long shub_itc_clocks_max;
+        unsigned long shub_ptc_flushes_not_my_mm;
 };
 
 static inline unsigned long wait_piowc(void)
 {
-        volatile unsigned long *piows, zeroval;
-        unsigned long ws;
+        volatile unsigned long *piows;
+        unsigned long zeroval, ws;
 
         piows = pda->pio_write_status_addr;
         zeroval = pda->pio_write_status_val;
         do {
                 cpu_relax();
         } while (((ws = *piows) & SH_PIO_WRITE_STATUS_PENDING_WRITE_COUNT_MASK) != zeroval);
-        return ws;
+        return (ws & SH_PIO_WRITE_STATUS_WRITE_DEADLOCK_MASK) != 0;
 }
 
 void sn_tlb_migrate_finish(struct mm_struct *mm)
 {
-        if (mm == current->mm)
+        /* flush_tlb_mm is inefficient if more than 1 users of mm */
+        if (mm == current->mm && mm && atomic_read(&mm->mm_users) == 1)
                 flush_tlb_mm(mm);
 }
 
@@ -201,12 +128,14 @@ void
 sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
                      unsigned long end, unsigned long nbits)
 {
-        int i, opt, shub1, cnode, mynasid, cpu, lcpu = 0, nasid, flushed = 0;
-        int mymm = (mm == current->active_mm && current->mm);
+        int i, ibegin, shub1, cnode, mynasid, cpu, lcpu = 0, nasid;
+        int mymm = (mm == current->active_mm && mm == current->mm);
+        int use_cpu_ptcga;
         volatile unsigned long *ptc0, *ptc1;
-        unsigned long itc, itc2, flags, data0 = 0, data1 = 0, rr_value;
+        unsigned long itc, itc2, flags, data0 = 0, data1 = 0, rr_value, old_rr = 0;
         short nasids[MAX_NUMNODES], nix;
         nodemask_t nodes_flushed;
+        int active, max_active, deadlock;
 
         nodes_clear(nodes_flushed);
         i = 0;
@@ -267,41 +196,56 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
         
 
         mynasid = get_nasid();
+        use_cpu_ptcga = local_node_uses_ptc_ga(shub1);
+        max_active = max_active_pio(shub1);
 
         itc = ia64_get_itc();
-        opt = ptc_lock(&flags);
+        ptc_lock(shub1, &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;
+        if (!mymm)
+                 __get_cpu_var(ptcstats).shub_ptc_flushes_not_my_mm++;
 
+        if (use_cpu_ptcga && !mymm) {
+                old_rr = ia64_get_rr(start);
+                ia64_set_rr(start, (old_rr & 0xff) | (rr_value << 8));
+                ia64_srlz_d();
+        }
+
+        wait_piowc();
         do {
                 if (shub1)
                         data1 = start | (1UL << SH1_PTC_1_START_SHFT);
                 else
                         data0 = (data0 & ~SH2_PTC_ADDR_MASK) | (start & SH2_PTC_ADDR_MASK);
-                for (i = 0; i < nix; i++) {
+                deadlock = 0;
+                active = 0;
+                for (ibegin = 0, i = 0; i < nix; i++) {
                         nasid = nasids[i];
-                        if ((!(sn2_ptctest & 3)) && unlikely(nasid == mynasid && mymm)) {
+                        if (use_cpu_ptcga && unlikely(nasid == mynasid)) {
                                 ia64_ptcga(start, nbits << 2);
                                 ia64_srlz_i();
                         } else {
                                 ptc0 = CHANGE_NASID(nasid, ptc0);
                                 if (ptc1)
                                         ptc1 = CHANGE_NASID(nasid, ptc1);
-                                pio_atomic_phys_write_mmrs(ptc0, data0, ptc1,
-                                                           data1);
-                                flushed = 1;
+                                pio_atomic_phys_write_mmrs(ptc0, data0, ptc1, data1);
+                                active++;
+                        }
+                        if (active >= max_active || i == (nix - 1)) {
+                                if ((deadlock = wait_piowc())) {
+                                        sn2_ptc_deadlock_recovery(nasids, ibegin, i, mynasid, ptc0, data0, ptc1, data1);
+                                        if (reset_max_active_on_deadlock())
+                                                max_active = 1;
+                                }
+                                active = 0;
+                                ibegin = i + 1;
                         }
                 }
-                if (flushed
-                    && (wait_piowc() &
-                                (SH_PIO_WRITE_STATUS_WRITE_DEADLOCK_MASK))) {
-                        sn2_ptc_deadlock_recovery(nasids, nix, mynasid, ptc0, data0, ptc1, data1);
-                }
-
                 start += (1UL << nbits);
-
         } while (start < end);
 
         itc2 = ia64_get_itc() - itc2;
@@ -309,7 +253,12 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
         if (itc2 > __get_cpu_var(ptcstats).shub_itc_clocks_max)
                 __get_cpu_var(ptcstats).shub_itc_clocks_max = itc2;
 
-        ptc_unlock(flags, opt);
+        if (old_rr) {
+                ia64_set_rr(start, old_rr);
+                ia64_srlz_d();
+        }
+
+        ptc_unlock(shub1, flags);
 
         preempt_enable();
 }
@@ -321,27 +270,30 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
  * TLB flush transaction.  The recovery sequence is somewhat tricky & is
  * coded in assembly language.
  */
-void sn2_ptc_deadlock_recovery(short *nasids, short nix, int mynasid, volatile unsigned long *ptc0, unsigned long data0,
+void sn2_ptc_deadlock_recovery(short *nasids, short ib, short ie, 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,
+        extern unsigned long sn2_ptc_deadlock_recovery_core(volatile unsigned long *, unsigned long,
                 volatile unsigned long *, unsigned long, volatile unsigned long *, unsigned long);
         short nasid, i;
-        unsigned long *piows, zeroval;
+        unsigned long *piows, zeroval, n;
 
         __get_cpu_var(ptcstats).deadlocks++;
 
         piows = (unsigned long *) pda->pio_write_status_addr;
         zeroval = pda->pio_write_status_val;
 
-        for (i=0; i < nix; i++) {
+
+        for (i=ib; i <= ie; i++) {
                 nasid = nasids[i];
-                if (!(sn2_ptctest & 3) && nasid == mynasid)
+                if (local_node_uses_ptc_ga(is_shub1()) && nasid == mynasid)
                         continue;
                 ptc0 = CHANGE_NASID(nasid, ptc0);
                 if (ptc1)
                         ptc1 = CHANGE_NASID(nasid, ptc1);
-                sn2_ptc_deadlock_recovery_core(ptc0, data0, ptc1, data1, piows, zeroval);
+
+                n = sn2_ptc_deadlock_recovery_core(ptc0, data0, ptc1, data1, piows, zeroval);
+                __get_cpu_var(ptcstats).deadlocks2 += n;
         }
 
 }
@@ -452,20 +404,22 @@ static int sn2_ptc_seq_show(struct seq_file *file, void *data)
         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,
+                           "# cpu ptc_l newrid ptc_flushes nodes_flushed deadlocks lock_nsec shub_nsec shub_nsec_max not_my_mm deadlock2\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,
+                seq_printf(file, "cpu %d %ld %ld %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);
+                                1000 * stat->shub_itc_clocks_max / per_cpu(cpu_info, cpu).cyc_per_usec,
+                                stat->shub_ptc_flushes_not_my_mm,
+                                stat->deadlocks2);
         }
-
         return 0;
 }
 
@@ -476,7 +430,7 @@ static struct seq_operations sn2_ptc_seq_ops = {
         .show = sn2_ptc_seq_show
 };
 
-int sn2_ptc_proc_open(struct inode *inode, struct file *file)
+static int sn2_ptc_proc_open(struct inode *inode, struct file *file)
 {
         return seq_open(file, &sn2_ptc_seq_ops);
 }
diff --git a/arch/ia64/sn/kernel/sn2/sn_hwperf.c b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
index 19b54fbcd7ea..70db21f3df21 100644
--- a/arch/ia64/sn/kernel/sn2/sn_hwperf.c
+++ b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
@@ -3,7 +3,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2004-2005 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2004-2006 Silicon Graphics, Inc. All rights reserved.
  *
  * SGI Altix topology and hardware performance monitoring API.
  * Mark Goodwin <markgw@sgi.com>. 
@@ -973,6 +973,9 @@ static int __devinit sn_hwperf_misc_register_init(void)
 {
         int e;
 
+        if (!ia64_platform_is("sn2"))
+                return 0;
+
         sn_hwperf_init();
 
         /*
diff --git a/arch/ia64/sn/kernel/xpc_main.c b/arch/ia64/sn/kernel/xpc_main.c
index c75f8aeefc2b..9cd460dfe27e 100644
--- a/arch/ia64/sn/kernel/xpc_main.c
+++ b/arch/ia64/sn/kernel/xpc_main.c
@@ -575,18 +575,21 @@ xpc_activate_partition(struct xpc_partition *part)
 
         spin_lock_irqsave(&part->act_lock, irq_flags);
 
-        pid = kernel_thread(xpc_activating, (void *) ((u64) partid), 0);
-
         DBUG_ON(part->act_state != XPC_P_INACTIVE);
 
-        if (pid > 0) {
-                part->act_state = XPC_P_ACTIVATION_REQ;
-                XPC_SET_REASON(part, xpcCloneKThread, __LINE__);
-        } else {
-                XPC_SET_REASON(part, xpcCloneKThreadFailed, __LINE__);
-        }
+        part->act_state = XPC_P_ACTIVATION_REQ;
+        XPC_SET_REASON(part, xpcCloneKThread, __LINE__);
 
         spin_unlock_irqrestore(&part->act_lock, irq_flags);
+
+        pid = kernel_thread(xpc_activating, (void *) ((u64) partid), 0);
+
+        if (unlikely(pid <= 0)) {
+                spin_lock_irqsave(&part->act_lock, irq_flags);
+                part->act_state = XPC_P_INACTIVE;
+                XPC_SET_REASON(part, xpcCloneKThreadFailed, __LINE__);
+                spin_unlock_irqrestore(&part->act_lock, irq_flags);
+        }
 }