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Diffstat (limited to 'arch/x86/kernel/io_apic.c')
-rw-r--r--arch/x86/kernel/io_apic.c199
1 files changed, 74 insertions, 125 deletions
diff --git a/arch/x86/kernel/io_apic.c b/arch/x86/kernel/io_apic.c
index e03bc0f87ee..6f80dc2f137 100644
--- a/arch/x86/kernel/io_apic.c
+++ b/arch/x86/kernel/io_apic.c
@@ -107,7 +107,6 @@ static int __init parse_noapic(char *str)
}
early_param("noapic", parse_noapic);
-struct irq_cfg;
struct irq_pin_list;
struct irq_cfg {
unsigned int irq;
@@ -120,7 +119,7 @@ struct irq_cfg {
};
/* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
-static struct irq_cfg irq_cfg_legacy[] __initdata = {
+static struct irq_cfg irq_cfgx[NR_IRQS] = {
[0] = { .irq = 0, .domain = CPU_MASK_ALL, .vector = IRQ0_VECTOR, },
[1] = { .irq = 1, .domain = CPU_MASK_ALL, .vector = IRQ1_VECTOR, },
[2] = { .irq = 2, .domain = CPU_MASK_ALL, .vector = IRQ2_VECTOR, },
@@ -139,49 +138,27 @@ static struct irq_cfg irq_cfg_legacy[] __initdata = {
[15] = { .irq = 15, .domain = CPU_MASK_ALL, .vector = IRQ15_VECTOR, },
};
-static struct irq_cfg irq_cfg_init = { .irq = -1U, };
-
-static void init_one_irq_cfg(struct irq_cfg *cfg)
-{
- memcpy(cfg, &irq_cfg_init, sizeof(struct irq_cfg));
-}
-
-static struct irq_cfg *irq_cfgx;
-
-static void __init init_work(void *data)
-{
- struct dyn_array *da = data;
- struct irq_cfg *cfg;
- int legacy_count;
- int i;
-
- cfg = *da->name;
-
- memcpy(cfg, irq_cfg_legacy, sizeof(irq_cfg_legacy));
-
- legacy_count = ARRAY_SIZE(irq_cfg_legacy);
- for (i = legacy_count; i < *da->nr; i++)
- init_one_irq_cfg(&cfg[i]);
-}
-
#define for_each_irq_cfg(irq, cfg) \
- for (irq = 0, cfg = &irq_cfgx[irq]; irq < nr_irqs; irq++, cfg = &irq_cfgx[irq])
+ for (irq = 0, cfg = irq_cfgx; irq < nr_irqs; irq++, cfg++)
-DEFINE_DYN_ARRAY(irq_cfgx, sizeof(struct irq_cfg), nr_irqs, PAGE_SIZE, init_work);
-
-struct irq_cfg *irq_cfg(unsigned int irq)
+static struct irq_cfg *irq_cfg(unsigned int irq)
{
- if (irq < nr_irqs)
- return &irq_cfgx[irq];
-
- return NULL;
+ return irq < nr_irqs ? irq_cfgx + irq : NULL;
}
-struct irq_cfg *irq_cfg_alloc(unsigned int irq)
+
+static struct irq_cfg *irq_cfg_alloc(unsigned int irq)
{
return irq_cfg(irq);
}
/*
+ * Rough estimation of how many shared IRQs there are, can be changed
+ * anytime.
+ */
+#define MAX_PLUS_SHARED_IRQS NR_IRQS
+#define PIN_MAP_SIZE (MAX_PLUS_SHARED_IRQS + NR_IRQS)
+
+/*
* This is performance-critical, we want to do it O(1)
*
* the indexing order of this array favors 1:1 mappings
@@ -193,59 +170,29 @@ struct irq_pin_list {
struct irq_pin_list *next;
};
-static struct irq_pin_list *irq_2_pin_head;
-/* fill one page ? */
-static int nr_irq_2_pin = 0x100;
+static struct irq_pin_list irq_2_pin_head[PIN_MAP_SIZE];
static struct irq_pin_list *irq_2_pin_ptr;
-static void __init irq_2_pin_init_work(void *data)
+
+static void __init irq_2_pin_init(void)
{
- struct dyn_array *da = data;
- struct irq_pin_list *pin;
+ struct irq_pin_list *pin = irq_2_pin_head;
int i;
- pin = *da->name;
-
- for (i = 1; i < *da->nr; i++)
+ for (i = 1; i < PIN_MAP_SIZE; i++)
pin[i-1].next = &pin[i];
irq_2_pin_ptr = &pin[0];
}
-DEFINE_DYN_ARRAY(irq_2_pin_head, sizeof(struct irq_pin_list), nr_irq_2_pin, PAGE_SIZE, irq_2_pin_init_work);
static struct irq_pin_list *get_one_free_irq_2_pin(void)
{
- struct irq_pin_list *pin;
- int i;
-
- pin = irq_2_pin_ptr;
-
- if (pin) {
- irq_2_pin_ptr = pin->next;
- pin->next = NULL;
- return pin;
- }
-
- /*
- * we run out of pre-allocate ones, allocate more
- */
- printk(KERN_DEBUG "try to get more irq_2_pin %d\n", nr_irq_2_pin);
-
- if (after_bootmem)
- pin = kzalloc(sizeof(struct irq_pin_list)*nr_irq_2_pin,
- GFP_ATOMIC);
- else
- pin = __alloc_bootmem_nopanic(sizeof(struct irq_pin_list) *
- nr_irq_2_pin, PAGE_SIZE, 0);
+ struct irq_pin_list *pin = irq_2_pin_ptr;
if (!pin)
panic("can not get more irq_2_pin\n");
- for (i = 1; i < nr_irq_2_pin; i++)
- pin[i-1].next = &pin[i];
-
irq_2_pin_ptr = pin->next;
pin->next = NULL;
-
return pin;
}
@@ -284,8 +231,9 @@ static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned i
static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
{
struct io_apic __iomem *io_apic = io_apic_base(apic);
- if (sis_apic_bug)
- writel(reg, &io_apic->index);
+
+ if (sis_apic_bug)
+ writel(reg, &io_apic->index);
writel(value, &io_apic->data);
}
@@ -1044,11 +992,11 @@ static int pin_2_irq(int idx, int apic, int pin)
while (i < apic)
irq += nr_ioapic_registers[i++];
irq += pin;
- /*
+ /*
* For MPS mode, so far only needed by ES7000 platform
*/
- if (ioapic_renumber_irq)
- irq = ioapic_renumber_irq(apic, irq);
+ if (ioapic_renumber_irq)
+ irq = ioapic_renumber_irq(apic, irq);
}
#ifdef CONFIG_X86_32
@@ -1232,19 +1180,19 @@ static struct irq_chip ir_ioapic_chip;
#ifdef CONFIG_X86_32
static inline int IO_APIC_irq_trigger(int irq)
{
- int apic, idx, pin;
+ int apic, idx, pin;
- for (apic = 0; apic < nr_ioapics; apic++) {
- for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
- idx = find_irq_entry(apic, pin, mp_INT);
- if ((idx != -1) && (irq == pin_2_irq(idx, apic, pin)))
- return irq_trigger(idx);
- }
- }
- /*
+ for (apic = 0; apic < nr_ioapics; apic++) {
+ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
+ idx = find_irq_entry(apic, pin, mp_INT);
+ if ((idx != -1) && (irq == pin_2_irq(idx, apic, pin)))
+ return irq_trigger(idx);
+ }
+ }
+ /*
* nonexistent IRQs are edge default
*/
- return 0;
+ return 0;
}
#else
static inline int IO_APIC_irq_trigger(int irq)
@@ -1509,8 +1457,8 @@ __apicdebuginit(void) print_IO_APIC(void)
reg_01.raw = io_apic_read(apic, 1);
if (reg_01.bits.version >= 0x10)
reg_02.raw = io_apic_read(apic, 2);
- if (reg_01.bits.version >= 0x20)
- reg_03.raw = io_apic_read(apic, 3);
+ if (reg_01.bits.version >= 0x20)
+ reg_03.raw = io_apic_read(apic, 3);
spin_unlock_irqrestore(&ioapic_lock, flags);
printk("\n");
@@ -2089,9 +2037,9 @@ static int ioapic_retrigger_irq(unsigned int irq)
#else
static int ioapic_retrigger_irq(unsigned int irq)
{
- send_IPI_self(irq_cfg(irq)->vector);
+ send_IPI_self(irq_cfg(irq)->vector);
- return 1;
+ return 1;
}
#endif
@@ -2189,7 +2137,7 @@ static int migrate_irq_remapped_level(int irq)
if (io_apic_level_ack_pending(irq)) {
/*
- * Interrupt in progress. Migrating irq now will change the
+ * Interrupt in progress. Migrating irq now will change the
* vector information in the IO-APIC RTE and that will confuse
* the EOI broadcast performed by cpu.
* So, delay the irq migration to the next instance.
@@ -2426,28 +2374,28 @@ static void ack_apic_level(unsigned int irq)
}
static struct irq_chip ioapic_chip __read_mostly = {
- .name = "IO-APIC",
- .startup = startup_ioapic_irq,
- .mask = mask_IO_APIC_irq,
- .unmask = unmask_IO_APIC_irq,
- .ack = ack_apic_edge,
- .eoi = ack_apic_level,
+ .name = "IO-APIC",
+ .startup = startup_ioapic_irq,
+ .mask = mask_IO_APIC_irq,
+ .unmask = unmask_IO_APIC_irq,
+ .ack = ack_apic_edge,
+ .eoi = ack_apic_level,
#ifdef CONFIG_SMP
- .set_affinity = set_ioapic_affinity_irq,
+ .set_affinity = set_ioapic_affinity_irq,
#endif
.retrigger = ioapic_retrigger_irq,
};
#ifdef CONFIG_INTR_REMAP
static struct irq_chip ir_ioapic_chip __read_mostly = {
- .name = "IR-IO-APIC",
- .startup = startup_ioapic_irq,
- .mask = mask_IO_APIC_irq,
- .unmask = unmask_IO_APIC_irq,
- .ack = ack_x2apic_edge,
- .eoi = ack_x2apic_level,
+ .name = "IR-IO-APIC",
+ .startup = startup_ioapic_irq,
+ .mask = mask_IO_APIC_irq,
+ .unmask = unmask_IO_APIC_irq,
+ .ack = ack_x2apic_edge,
+ .eoi = ack_x2apic_level,
#ifdef CONFIG_SMP
- .set_affinity = set_ir_ioapic_affinity_irq,
+ .set_affinity = set_ir_ioapic_affinity_irq,
#endif
.retrigger = ioapic_retrigger_irq,
};
@@ -2636,8 +2584,8 @@ static inline void __init check_timer(void)
local_irq_save(flags);
- ver = apic_read(APIC_LVR);
- ver = GET_APIC_VERSION(ver);
+ ver = apic_read(APIC_LVR);
+ ver = GET_APIC_VERSION(ver);
/*
* get/set the timer IRQ vector:
@@ -2822,12 +2770,12 @@ void __init setup_IO_APIC(void)
io_apic_irqs = ~PIC_IRQS;
apic_printk(APIC_VERBOSE, "ENABLING IO-APIC IRQs\n");
- /*
+ /*
* Set up IO-APIC IRQ routing.
*/
#ifdef CONFIG_X86_32
- if (!acpi_ioapic)
- setup_ioapic_ids_from_mpc();
+ if (!acpi_ioapic)
+ setup_ioapic_ids_from_mpc();
#endif
sync_Arb_IDs();
setup_IO_APIC_irqs();
@@ -2842,9 +2790,9 @@ void __init setup_IO_APIC(void)
static int __init io_apic_bug_finalize(void)
{
- if (sis_apic_bug == -1)
- sis_apic_bug = 0;
- return 0;
+ if (sis_apic_bug == -1)
+ sis_apic_bug = 0;
+ return 0;
}
late_initcall(io_apic_bug_finalize);
@@ -3199,7 +3147,7 @@ static int msi_alloc_irte(struct pci_dev *dev, int irq, int nvec)
if (index < 0) {
printk(KERN_ERR
"Unable to allocate %d IRTE for PCI %s\n", nvec,
- pci_name(dev));
+ pci_name(dev));
return -ENOSPC;
}
return index;
@@ -3885,23 +3833,24 @@ static struct resource * __init ioapic_setup_resources(void)
void __init ioapic_init_mappings(void)
{
unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0;
- int i;
struct resource *ioapic_res;
+ int i;
+ irq_2_pin_init();
ioapic_res = ioapic_setup_resources();
for (i = 0; i < nr_ioapics; i++) {
if (smp_found_config) {
ioapic_phys = mp_ioapics[i].mp_apicaddr;
#ifdef CONFIG_X86_32
- if (!ioapic_phys) {
- printk(KERN_ERR
- "WARNING: bogus zero IO-APIC "
- "address found in MPTABLE, "
- "disabling IO/APIC support!\n");
- smp_found_config = 0;
- skip_ioapic_setup = 1;
- goto fake_ioapic_page;
- }
+ if (!ioapic_phys) {
+ printk(KERN_ERR
+ "WARNING: bogus zero IO-APIC "
+ "address found in MPTABLE, "
+ "disabling IO/APIC support!\n");
+ smp_found_config = 0;
+ skip_ioapic_setup = 1;
+ goto fake_ioapic_page;
+ }
#endif
} else {
#ifdef CONFIG_X86_32
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 00:19:01 +0000