+#include <linux/interrupt.h>
#include <linux/dmar.h>
#include <linux/spinlock.h>
#include <linux/jiffies.h>
#include <linux/pci.h>
#include <linux/irq.h>
#include <asm/io_apic.h>
-#include "intel-iommu.h"
+#include <asm/smp.h>
+#include <asm/cpu.h>
+#include <linux/intel-iommu.h>
#include "intr_remapping.h"
static struct ioapic_scope ir_ioapic[MAX_IO_APICS];
static int ir_ioapic_num;
int intr_remapping_enabled;
-static struct {
+struct irq_2_iommu {
struct intel_iommu *iommu;
u16 irte_index;
u16 sub_handle;
u8 irte_mask;
-} irq_2_iommu[NR_IRQS];
+};
+
+#ifdef CONFIG_GENERIC_HARDIRQS
+static struct irq_2_iommu *get_one_free_irq_2_iommu(int cpu)
+{
+ struct irq_2_iommu *iommu;
+ int node;
+
+ node = cpu_to_node(cpu);
+
+ iommu = kzalloc_node(sizeof(*iommu), GFP_ATOMIC, node);
+ printk(KERN_DEBUG "alloc irq_2_iommu on cpu %d node %d\n", cpu, node);
+
+ return iommu;
+}
+
+static struct irq_2_iommu *irq_2_iommu(unsigned int irq)
+{
+ struct irq_desc *desc;
+
+ desc = irq_to_desc(irq);
+
+ if (WARN_ON_ONCE(!desc))
+ return NULL;
+
+ return desc->irq_2_iommu;
+}
+
+static struct irq_2_iommu *irq_2_iommu_alloc_cpu(unsigned int irq, int cpu)
+{
+ struct irq_desc *desc;
+ struct irq_2_iommu *irq_iommu;
+
+ /*
+ * alloc irq desc if not allocated already.
+ */
+ desc = irq_to_desc_alloc_cpu(irq, cpu);
+ if (!desc) {
+ printk(KERN_INFO "can not get irq_desc for %d\n", irq);
+ return NULL;
+ }
+
+ irq_iommu = desc->irq_2_iommu;
+
+ if (!irq_iommu)
+ desc->irq_2_iommu = get_one_free_irq_2_iommu(cpu);
+
+ return desc->irq_2_iommu;
+}
+
+static struct irq_2_iommu *irq_2_iommu_alloc(unsigned int irq)
+{
+ return irq_2_iommu_alloc_cpu(irq, boot_cpu_id);
+}
+
+#else /* !CONFIG_SPARSE_IRQ */
+
+static struct irq_2_iommu irq_2_iommuX[NR_IRQS];
+
+static struct irq_2_iommu *irq_2_iommu(unsigned int irq)
+{
+ if (irq < nr_irqs)
+ return &irq_2_iommuX[irq];
+
+ return NULL;
+}
+static struct irq_2_iommu *irq_2_iommu_alloc(unsigned int irq)
+{
+ return irq_2_iommu(irq);
+}
+#endif
static DEFINE_SPINLOCK(irq_2_ir_lock);
-int irq_remapped(int irq)
+static struct irq_2_iommu *valid_irq_2_iommu(unsigned int irq)
{
- if (irq > nr_irqs)
- return 0;
+ struct irq_2_iommu *irq_iommu;
- if (!irq_2_iommu[irq].iommu)
- return 0;
+ irq_iommu = irq_2_iommu(irq);
- return 1;
+ if (!irq_iommu)
+ return NULL;
+
+ if (!irq_iommu->iommu)
+ return NULL;
+
+ return irq_iommu;
+}
+
+int irq_remapped(int irq)
+{
+ return valid_irq_2_iommu(irq) != NULL;
}
int get_irte(int irq, struct irte *entry)
{
int index;
+ struct irq_2_iommu *irq_iommu;
- if (!entry || irq > nr_irqs)
+ if (!entry)
return -1;
spin_lock(&irq_2_ir_lock);
- if (!irq_2_iommu[irq].iommu) {
+ irq_iommu = valid_irq_2_iommu(irq);
+ if (!irq_iommu) {
spin_unlock(&irq_2_ir_lock);
return -1;
}
- index = irq_2_iommu[irq].irte_index + irq_2_iommu[irq].sub_handle;
- *entry = *(irq_2_iommu[irq].iommu->ir_table->base + index);
+ index = irq_iommu->irte_index + irq_iommu->sub_handle;
+ *entry = *(irq_iommu->iommu->ir_table->base + index);
spin_unlock(&irq_2_ir_lock);
return 0;
int alloc_irte(struct intel_iommu *iommu, int irq, u16 count)
{
struct ir_table *table = iommu->ir_table;
+ struct irq_2_iommu *irq_iommu;
u16 index, start_index;
unsigned int mask = 0;
int i;
if (!count)
return -1;
+#ifndef CONFIG_SPARSE_IRQ
+ /* protect irq_2_iommu_alloc later */
+ if (irq >= nr_irqs)
+ return -1;
+#endif
+
/*
* start the IRTE search from index 0.
*/
for (i = index; i < index + count; i++)
table->base[i].present = 1;
- irq_2_iommu[irq].iommu = iommu;
- irq_2_iommu[irq].irte_index = index;
- irq_2_iommu[irq].sub_handle = 0;
- irq_2_iommu[irq].irte_mask = mask;
+ irq_iommu = irq_2_iommu_alloc(irq);
+ if (!irq_iommu) {
+ spin_unlock(&irq_2_ir_lock);
+ printk(KERN_ERR "can't allocate irq_2_iommu\n");
+ return -1;
+ }
+
+ irq_iommu->iommu = iommu;
+ irq_iommu->irte_index = index;
+ irq_iommu->sub_handle = 0;
+ irq_iommu->irte_mask = mask;
spin_unlock(&irq_2_ir_lock);
return index;
}
-static void qi_flush_iec(struct intel_iommu *iommu, int index, int mask)
+static int qi_flush_iec(struct intel_iommu *iommu, int index, int mask)
{
struct qi_desc desc;
| QI_IEC_SELECTIVE;
desc.high = 0;
- qi_submit_sync(&desc, iommu);
+ return qi_submit_sync(&desc, iommu);
}
int map_irq_to_irte_handle(int irq, u16 *sub_handle)
{
int index;
+ struct irq_2_iommu *irq_iommu;
spin_lock(&irq_2_ir_lock);
- if (irq >= nr_irqs || !irq_2_iommu[irq].iommu) {
+ irq_iommu = valid_irq_2_iommu(irq);
+ if (!irq_iommu) {
spin_unlock(&irq_2_ir_lock);
return -1;
}
- *sub_handle = irq_2_iommu[irq].sub_handle;
- index = irq_2_iommu[irq].irte_index;
+ *sub_handle = irq_iommu->sub_handle;
+ index = irq_iommu->irte_index;
spin_unlock(&irq_2_ir_lock);
return index;
}
int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index, u16 subhandle)
{
+ struct irq_2_iommu *irq_iommu;
+
spin_lock(&irq_2_ir_lock);
- if (irq >= nr_irqs || irq_2_iommu[irq].iommu) {
+
+ irq_iommu = irq_2_iommu_alloc(irq);
+
+ if (!irq_iommu) {
spin_unlock(&irq_2_ir_lock);
+ printk(KERN_ERR "can't allocate irq_2_iommu\n");
return -1;
}
- irq_2_iommu[irq].iommu = iommu;
- irq_2_iommu[irq].irte_index = index;
- irq_2_iommu[irq].sub_handle = subhandle;
- irq_2_iommu[irq].irte_mask = 0;
+ irq_iommu->iommu = iommu;
+ irq_iommu->irte_index = index;
+ irq_iommu->sub_handle = subhandle;
+ irq_iommu->irte_mask = 0;
spin_unlock(&irq_2_ir_lock);
int clear_irte_irq(int irq, struct intel_iommu *iommu, u16 index)
{
+ struct irq_2_iommu *irq_iommu;
+
spin_lock(&irq_2_ir_lock);
- if (irq >= nr_irqs || !irq_2_iommu[irq].iommu) {
+ irq_iommu = valid_irq_2_iommu(irq);
+ if (!irq_iommu) {
spin_unlock(&irq_2_ir_lock);
return -1;
}
- irq_2_iommu[irq].iommu = NULL;
- irq_2_iommu[irq].irte_index = 0;
- irq_2_iommu[irq].sub_handle = 0;
- irq_2_iommu[irq].irte_mask = 0;
+ irq_iommu->iommu = NULL;
+ irq_iommu->irte_index = 0;
+ irq_iommu->sub_handle = 0;
+ irq_2_iommu(irq)->irte_mask = 0;
spin_unlock(&irq_2_ir_lock);
int modify_irte(int irq, struct irte *irte_modified)
{
+ int rc;
int index;
struct irte *irte;
struct intel_iommu *iommu;
+ struct irq_2_iommu *irq_iommu;
spin_lock(&irq_2_ir_lock);
- if (irq >= nr_irqs || !irq_2_iommu[irq].iommu) {
+ irq_iommu = valid_irq_2_iommu(irq);
+ if (!irq_iommu) {
spin_unlock(&irq_2_ir_lock);
return -1;
}
- iommu = irq_2_iommu[irq].iommu;
+ iommu = irq_iommu->iommu;
- index = irq_2_iommu[irq].irte_index + irq_2_iommu[irq].sub_handle;
+ index = irq_iommu->irte_index + irq_iommu->sub_handle;
irte = &iommu->ir_table->base[index];
set_64bit((unsigned long *)irte, irte_modified->low | (1 << 1));
__iommu_flush_cache(iommu, irte, sizeof(*irte));
- qi_flush_iec(iommu, index, 0);
-
+ rc = qi_flush_iec(iommu, index, 0);
spin_unlock(&irq_2_ir_lock);
- return 0;
+
+ return rc;
}
int flush_irte(int irq)
{
+ int rc;
int index;
struct intel_iommu *iommu;
+ struct irq_2_iommu *irq_iommu;
spin_lock(&irq_2_ir_lock);
- if (irq >= nr_irqs || !irq_2_iommu[irq].iommu) {
+ irq_iommu = valid_irq_2_iommu(irq);
+ if (!irq_iommu) {
spin_unlock(&irq_2_ir_lock);
return -1;
}
- iommu = irq_2_iommu[irq].iommu;
+ iommu = irq_iommu->iommu;
- index = irq_2_iommu[irq].irte_index + irq_2_iommu[irq].sub_handle;
+ index = irq_iommu->irte_index + irq_iommu->sub_handle;
- qi_flush_iec(iommu, index, irq_2_iommu[irq].irte_mask);
+ rc = qi_flush_iec(iommu, index, irq_iommu->irte_mask);
spin_unlock(&irq_2_ir_lock);
- return 0;
+ return rc;
}
struct intel_iommu *map_ioapic_to_ir(int apic)
int free_irte(int irq)
{
+ int rc = 0;
int index, i;
struct irte *irte;
struct intel_iommu *iommu;
+ struct irq_2_iommu *irq_iommu;
spin_lock(&irq_2_ir_lock);
- if (irq >= nr_irqs || !irq_2_iommu[irq].iommu) {
+ irq_iommu = valid_irq_2_iommu(irq);
+ if (!irq_iommu) {
spin_unlock(&irq_2_ir_lock);
return -1;
}
- iommu = irq_2_iommu[irq].iommu;
+ iommu = irq_iommu->iommu;
- index = irq_2_iommu[irq].irte_index + irq_2_iommu[irq].sub_handle;
+ index = irq_iommu->irte_index + irq_iommu->sub_handle;
irte = &iommu->ir_table->base[index];
- if (!irq_2_iommu[irq].sub_handle) {
- for (i = 0; i < (1 << irq_2_iommu[irq].irte_mask); i++)
+ if (!irq_iommu->sub_handle) {
+ for (i = 0; i < (1 << irq_iommu->irte_mask); i++)
set_64bit((unsigned long *)irte, 0);
- qi_flush_iec(iommu, index, irq_2_iommu[irq].irte_mask);
+ rc = qi_flush_iec(iommu, index, irq_iommu->irte_mask);
}
- irq_2_iommu[irq].iommu = NULL;
- irq_2_iommu[irq].irte_index = 0;
- irq_2_iommu[irq].sub_handle = 0;
- irq_2_iommu[irq].irte_mask = 0;
+ irq_iommu->iommu = NULL;
+ irq_iommu->irte_index = 0;
+ irq_iommu->sub_handle = 0;
+ irq_iommu->irte_mask = 0;
spin_unlock(&irq_2_ir_lock);
- return 0;
+ return rc;
}
static void iommu_set_intr_remapping(struct intel_iommu *iommu, int mode)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff