iommu/amd: Add initialization routines for AMD interrupt remapping
Add the six routines required to setup interrupt remapping
with the AMD IOMMU. Also put it all together into the AMD
specific irq_remap_ops.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index aeb890c..33f144f 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -45,6 +45,7 @@
#include "amd_iommu_proto.h"
#include "amd_iommu_types.h"
+#include "irq_remapping.h"
#define CMD_SET_TYPE(cmd, t) ((cmd)->data[1] |= ((t) << 28))
@@ -4226,4 +4227,19 @@
return 0;
}
+struct irq_remap_ops amd_iommu_irq_ops = {
+ .supported = amd_iommu_supported,
+ .prepare = amd_iommu_prepare,
+ .enable = amd_iommu_enable,
+ .disable = amd_iommu_disable,
+ .reenable = amd_iommu_reenable,
+ .enable_faulting = amd_iommu_enable_faulting,
+ .setup_ioapic_entry = setup_ioapic_entry,
+ .set_affinity = set_affinity,
+ .free_irq = free_irq,
+ .compose_msi_msg = compose_msi_msg,
+ .msi_alloc_irq = msi_alloc_irq,
+ .msi_setup_irq = msi_setup_irq,
+ .setup_hpet_msi = setup_hpet_msi,
+};
#endif
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 68b3305..d536d24 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -34,6 +34,7 @@
#include <asm/x86_init.h>
#include <asm/iommu_table.h>
#include <asm/io_apic.h>
+#include <asm/irq_remapping.h>
#include "amd_iommu_proto.h"
#include "amd_iommu_types.h"
@@ -1897,7 +1898,48 @@
return ret;
}
+#ifdef CONFIG_IRQ_REMAP
+int __init amd_iommu_prepare(void)
+{
+ return iommu_go_to_state(IOMMU_ACPI_FINISHED);
+}
+int __init amd_iommu_supported(void)
+{
+ return amd_iommu_irq_remap ? 1 : 0;
+}
+
+int __init amd_iommu_enable(void)
+{
+ int ret;
+
+ ret = iommu_go_to_state(IOMMU_ENABLED);
+ if (ret)
+ return ret;
+
+ irq_remapping_enabled = 1;
+
+ return 0;
+}
+
+void amd_iommu_disable(void)
+{
+ amd_iommu_suspend();
+}
+
+int amd_iommu_reenable(int mode)
+{
+ amd_iommu_resume();
+
+ return 0;
+}
+
+int __init amd_iommu_enable_faulting(void)
+{
+ /* We enable MSI later when PCI is initialized */
+ return 0;
+}
+#endif
/*
* This is the core init function for AMD IOMMU hardware in the system.
diff --git a/drivers/iommu/amd_iommu_proto.h b/drivers/iommu/amd_iommu_proto.h
index 1a7f41c..c294961 100644
--- a/drivers/iommu/amd_iommu_proto.h
+++ b/drivers/iommu/amd_iommu_proto.h
@@ -32,6 +32,14 @@
extern void amd_iommu_init_notifier(void);
extern void amd_iommu_init_api(void);
+/* Needed for interrupt remapping */
+extern int amd_iommu_supported(void);
+extern int amd_iommu_prepare(void);
+extern int amd_iommu_enable(void);
+extern void amd_iommu_disable(void);
+extern int amd_iommu_reenable(int);
+extern int amd_iommu_enable_faulting(void);
+
/* IOMMUv2 specific functions */
struct iommu_domain;
diff --git a/drivers/iommu/irq_remapping.h b/drivers/iommu/irq_remapping.h
index 624d360..95363ac 100644
--- a/drivers/iommu/irq_remapping.h
+++ b/drivers/iommu/irq_remapping.h
@@ -82,6 +82,7 @@
};
extern struct irq_remap_ops intel_irq_remap_ops;
+extern struct irq_remap_ops amd_iommu_irq_ops;
#else /* CONFIG_IRQ_REMAP */