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Diffstat (limited to 'arch/x86/kernel/genx2apic_uv_x.c')
-rw-r--r--arch/x86/kernel/genx2apic_uv_x.c165
1 files changed, 135 insertions, 30 deletions
diff --git a/arch/x86/kernel/genx2apic_uv_x.c b/arch/x86/kernel/genx2apic_uv_x.c
index 33581d9..dece172 100644
--- a/arch/x86/kernel/genx2apic_uv_x.c
+++ b/arch/x86/kernel/genx2apic_uv_x.c
@@ -10,14 +10,17 @@
#include <linux/kernel.h>
#include <linux/threads.h>
+#include <linux/cpu.h>
#include <linux/cpumask.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/init.h>
#include <linux/sched.h>
-#include <linux/bootmem.h>
#include <linux/module.h>
#include <linux/hardirq.h>
+#include <linux/timer.h>
+#include <linux/proc_fs.h>
+#include <asm/current.h>
#include <asm/smp.h>
#include <asm/ipi.h>
#include <asm/genapic.h>
@@ -30,7 +33,7 @@ DEFINE_PER_CPU(int, x2apic_extra_bits);
static enum uv_system_type uv_system_type;
-static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
+static int uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
if (!strcmp(oem_id, "SGI")) {
if (!strcmp(oem_table_id, "UVL"))
@@ -341,12 +344,12 @@ static __init void map_mmioh_high(int max_pnode)
static __init void uv_rtc_init(void)
{
- long status, ticks_per_sec, drift;
+ long status;
+ u64 ticks_per_sec;
- status =
- x86_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK, &ticks_per_sec,
- &drift);
- if (status != 0 || ticks_per_sec < 100000) {
+ status = uv_bios_freq_base(BIOS_FREQ_BASE_REALTIME_CLOCK,
+ &ticks_per_sec);
+ if (status != BIOS_STATUS_SUCCESS || ticks_per_sec < 100000) {
printk(KERN_WARNING
"unable to determine platform RTC clock frequency, "
"guessing.\n");
@@ -356,7 +359,119 @@ static __init void uv_rtc_init(void)
sn_rtc_cycles_per_second = ticks_per_sec;
}
-static bool uv_system_inited;
+/*
+ * percpu heartbeat timer
+ */
+static void uv_heartbeat(unsigned long ignored)
+{
+ struct timer_list *timer = &uv_hub_info->scir.timer;
+ unsigned char bits = uv_hub_info->scir.state;
+
+ /* flip heartbeat bit */
+ bits ^= SCIR_CPU_HEARTBEAT;
+
+ /* is this cpu idle? */
+ if (idle_cpu(raw_smp_processor_id()))
+ bits &= ~SCIR_CPU_ACTIVITY;
+ else
+ bits |= SCIR_CPU_ACTIVITY;
+
+ /* update system controller interface reg */
+ uv_set_scir_bits(bits);
+
+ /* enable next timer period */
+ mod_timer(timer, jiffies + SCIR_CPU_HB_INTERVAL);
+}
+
+static void __cpuinit uv_heartbeat_enable(int cpu)
+{
+ if (!uv_cpu_hub_info(cpu)->scir.enabled) {
+ struct timer_list *timer = &uv_cpu_hub_info(cpu)->scir.timer;
+
+ uv_set_cpu_scir_bits(cpu, SCIR_CPU_HEARTBEAT|SCIR_CPU_ACTIVITY);
+ setup_timer(timer, uv_heartbeat, cpu);
+ timer->expires = jiffies + SCIR_CPU_HB_INTERVAL;
+ add_timer_on(timer, cpu);
+ uv_cpu_hub_info(cpu)->scir.enabled = 1;
+ }
+
+ /* check boot cpu */
+ if (!uv_cpu_hub_info(0)->scir.enabled)
+ uv_heartbeat_enable(0);
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+static void __cpuinit uv_heartbeat_disable(int cpu)
+{
+ if (uv_cpu_hub_info(cpu)->scir.enabled) {
+ uv_cpu_hub_info(cpu)->scir.enabled = 0;
+ del_timer(&uv_cpu_hub_info(cpu)->scir.timer);
+ }
+ uv_set_cpu_scir_bits(cpu, 0xff);
+}
+
+/*
+ * cpu hotplug notifier
+ */
+static __cpuinit int uv_scir_cpu_notify(struct notifier_block *self,
+ unsigned long action, void *hcpu)
+{
+ long cpu = (long)hcpu;
+
+ switch (action) {
+ case CPU_ONLINE:
+ uv_heartbeat_enable(cpu);
+ break;
+ case CPU_DOWN_PREPARE:
+ uv_heartbeat_disable(cpu);
+ break;
+ default:
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+static __init void uv_scir_register_cpu_notifier(void)
+{
+ hotcpu_notifier(uv_scir_cpu_notify, 0);
+}
+
+#else /* !CONFIG_HOTPLUG_CPU */
+
+static __init void uv_scir_register_cpu_notifier(void)
+{
+}
+
+static __init int uv_init_heartbeat(void)
+{
+ int cpu;
+
+ if (is_uv_system())
+ for_each_online_cpu(cpu)
+ uv_heartbeat_enable(cpu);
+ return 0;
+}
+
+late_initcall(uv_init_heartbeat);
+
+#endif /* !CONFIG_HOTPLUG_CPU */
+
+/*
+ * Called on each cpu to initialize the per_cpu UV data area.
+ * ZZZ hotplug not supported yet
+ */
+void __cpuinit uv_cpu_init(void)
+{
+ /* CPU 0 initilization will be done via uv_system_init. */
+ if (!uv_blade_info)
+ return;
+
+ uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;
+
+ if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
+ set_x2apic_extra_bits(uv_hub_info->pnode);
+}
+
void __init uv_system_init(void)
{
@@ -383,16 +498,16 @@ void __init uv_system_init(void)
printk(KERN_DEBUG "UV: Found %d blades\n", uv_num_possible_blades());
bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
- uv_blade_info = alloc_bootmem_pages(bytes);
+ uv_blade_info = kmalloc(bytes, GFP_KERNEL);
get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
bytes = sizeof(uv_node_to_blade[0]) * num_possible_nodes();
- uv_node_to_blade = alloc_bootmem_pages(bytes);
+ uv_node_to_blade = kmalloc(bytes, GFP_KERNEL);
memset(uv_node_to_blade, 255, bytes);
bytes = sizeof(uv_cpu_to_blade[0]) * num_possible_cpus();
- uv_cpu_to_blade = alloc_bootmem_pages(bytes);
+ uv_cpu_to_blade = kmalloc(bytes, GFP_KERNEL);
memset(uv_cpu_to_blade, 255, bytes);
blade = 0;
@@ -412,6 +527,9 @@ void __init uv_system_init(void)
gnode_upper = (((unsigned long)node_id.s.node_id) &
~((1 << n_val) - 1)) << m_val;
+ uv_bios_init();
+ uv_bios_get_sn_info(0, &uv_type, &sn_partition_id,
+ &sn_coherency_id, &sn_region_size);
uv_rtc_init();
for_each_present_cpu(cpu) {
@@ -422,8 +540,7 @@ void __init uv_system_init(void)
uv_blade_info[blade].nr_possible_cpus++;
uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
- uv_cpu_hub_info(cpu)->lowmem_remap_top =
- lowmem_redir_base + lowmem_redir_size;
+ uv_cpu_hub_info(cpu)->lowmem_remap_top = lowmem_redir_size;
uv_cpu_hub_info(cpu)->m_val = m_val;
uv_cpu_hub_info(cpu)->n_val = m_val;
uv_cpu_hub_info(cpu)->numa_blade_id = blade;
@@ -433,7 +550,8 @@ void __init uv_system_init(void)
uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
- uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */
+ uv_cpu_hub_info(cpu)->coherency_domain_number = sn_coherency_id;
+ uv_cpu_hub_info(cpu)->scir.offset = SCIR_LOCAL_MMR_BASE + lcpu;
uv_node_to_blade[nid] = blade;
uv_cpu_to_blade[cpu] = blade;
max_pnode = max(pnode, max_pnode);
@@ -448,21 +566,8 @@ void __init uv_system_init(void)
map_mmr_high(max_pnode);
map_config_high(max_pnode);
map_mmioh_high(max_pnode);
- uv_system_inited = true;
-}
-
-/*
- * Called on each cpu to initialize the per_cpu UV data area.
- * ZZZ hotplug not supported yet
- */
-void __cpuinit uv_cpu_init(void)
-{
- BUG_ON(!uv_system_inited);
-
- uv_blade_info[uv_numa_blade_id()].nr_online_cpus++;
- if (get_uv_system_type() == UV_NON_UNIQUE_APIC)
- set_x2apic_extra_bits(uv_hub_info->pnode);
+ uv_cpu_init();
+ uv_scir_register_cpu_notifier();
+ proc_mkdir("sgi_uv", NULL);
}
-
-
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