summaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
Diffstat (limited to 'drivers')
-rw-r--r--drivers/iommu/irq_remapping.c50
-rw-r--r--drivers/iommu/irq_remapping.h10
2 files changed, 59 insertions, 1 deletions
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index 5617150fd8fb..c306421d86c1 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -345,7 +345,7 @@ void panic_if_irq_remap(const char *msg)
panic(msg);
}
-static void ir_ack_apic_edge(struct irq_data *data)
+void ir_ack_apic_edge(struct irq_data *data)
{
ack_APIC_irq();
}
@@ -356,6 +356,19 @@ static void ir_ack_apic_level(struct irq_data *data)
eoi_ioapic_irq(data->irq, irqd_cfg(data));
}
+void irq_remapping_print_chip(struct irq_data *data, struct seq_file *p)
+{
+ /*
+ * Assume interrupt is remapped if the parent irqdomain isn't the
+ * vector domain, which is true for MSI, HPET and IOAPIC on x86
+ * platforms.
+ */
+ if (data->domain && data->domain->parent != arch_get_ir_parent_domain())
+ seq_printf(p, " IR-%s", data->chip->name);
+ else
+ seq_printf(p, " %s", data->chip->name);
+}
+
static void ir_print_prefix(struct irq_data *data, struct seq_file *p)
{
seq_printf(p, " IR-%s", data->chip->name);
@@ -377,3 +390,38 @@ bool setup_remapped_irq(int irq, struct irq_cfg *cfg, struct irq_chip *chip)
irq_remap_modify_chip_defaults(chip);
return true;
}
+
+/**
+ * irq_remapping_get_ir_irq_domain - Get the irqdomain associated with the IOMMU
+ * device serving request @info
+ * @info: interrupt allocation information, used to identify the IOMMU device
+ *
+ * It's used to get parent irqdomain for HPET and IOAPIC irqdomains.
+ * Returns pointer to IRQ domain, or NULL on failure.
+ */
+struct irq_domain *
+irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info)
+{
+ if (!remap_ops || !remap_ops->get_ir_irq_domain)
+ return NULL;
+
+ return remap_ops->get_ir_irq_domain(info);
+}
+
+/**
+ * irq_remapping_get_irq_domain - Get the irqdomain serving the request @info
+ * @info: interrupt allocation information, used to identify the IOMMU device
+ *
+ * There will be one PCI MSI/MSIX irqdomain associated with each interrupt
+ * remapping device, so this interface is used to retrieve the PCI MSI/MSIX
+ * irqdomain serving request @info.
+ * Returns pointer to IRQ domain, or NULL on failure.
+ */
+struct irq_domain *
+irq_remapping_get_irq_domain(struct irq_alloc_info *info)
+{
+ if (!remap_ops || !remap_ops->get_irq_domain)
+ return NULL;
+
+ return remap_ops->get_irq_domain(info);
+}
diff --git a/drivers/iommu/irq_remapping.h b/drivers/iommu/irq_remapping.h
index 7c70cc29ffe6..3e109b1ea688 100644
--- a/drivers/iommu/irq_remapping.h
+++ b/drivers/iommu/irq_remapping.h
@@ -30,6 +30,8 @@ struct irq_data;
struct cpumask;
struct pci_dev;
struct msi_msg;
+struct irq_domain;
+struct irq_alloc_info;
extern int irq_remap_broken;
extern int disable_sourceid_checking;
@@ -77,11 +79,19 @@ struct irq_remap_ops {
/* Setup interrupt remapping for an HPET MSI */
int (*alloc_hpet_msi)(unsigned int, unsigned int);
+
+ /* Get the irqdomain associated the IOMMU device */
+ struct irq_domain *(*get_ir_irq_domain)(struct irq_alloc_info *);
+
+ /* Get the MSI irqdomain associated with the IOMMU device */
+ struct irq_domain *(*get_irq_domain)(struct irq_alloc_info *);
};
extern struct irq_remap_ops intel_irq_remap_ops;
extern struct irq_remap_ops amd_iommu_irq_ops;
+extern void ir_ack_apic_edge(struct irq_data *data);
+
#else /* CONFIG_IRQ_REMAP */
#define irq_remapping_enabled 0