iommu/irq_remapping: Consolidate irq domain lookup

Now that the iommu implementations handle the X86_*_GET_PARENT_DOMAIN
types, consolidate the two getter functions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200826112331.741909337@linutronix.de

8 files changed, 6 insertions, 40 deletions

diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h
index 4bc985f1e2e4..af4a151d70b3 100644
--- a/arch/x86/include/asm/irq_remapping.h
+++ b/arch/x86/include/asm/irq_remapping.h
@@ -45,8 +45,6 @@ extern int irq_remap_enable_fault_handling(void);
 extern void panic_if_irq_remap(const char *msg);
 
 extern struct irq_domain *
-irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info);
-extern struct irq_domain *
 irq_remapping_get_irq_domain(struct irq_alloc_info *info);
 
 /* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */
@@ -74,12 +72,6 @@ static inline void panic_if_irq_remap(const char *msg)
 }
 
 static inline struct irq_domain *
-irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info)
-{
-	return NULL;
-}
-
-static inline struct irq_domain *
 irq_remapping_get_irq_domain(struct irq_alloc_info *info)
 {
 	return NULL;
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index be01bb608d49..20ba0b76021b 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2298,7 +2298,7 @@ static int mp_irqdomain_create(int ioapic)
 	init_irq_alloc_info(&info, NULL);
 	info.type = X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT;
 	info.ioapic_id = mpc_ioapic_id(ioapic);
-	parent = irq_remapping_get_ir_irq_domain(&info);
+	parent = irq_remapping_get_irq_domain(&info);
 	if (!parent)
 		parent = x86_vector_domain;
 	else
diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index 421c0169a124..9edb1bbdc805 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -474,7 +474,7 @@ struct irq_domain *hpet_create_irq_domain(int hpet_id)
 	init_irq_alloc_info(&info, NULL);
 	info.type = X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT;
 	info.hpet_id = hpet_id;
-	parent = irq_remapping_get_ir_irq_domain(&info);
+	parent = irq_remapping_get_irq_domain(&info);
 	if (parent == NULL)
 		parent = x86_vector_domain;
 	else
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 4d4045aec837..18b4dfb1a605 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -3575,7 +3575,6 @@ struct irq_remap_ops amd_iommu_irq_ops = {
 	.disable		= amd_iommu_disable,
 	.reenable		= amd_iommu_reenable,
 	.enable_faulting	= amd_iommu_enable_faulting,
-	.get_ir_irq_domain	= get_irq_domain,
 	.get_irq_domain		= get_irq_domain,
 };
 
diff --git a/drivers/iommu/hyperv-iommu.c b/drivers/iommu/hyperv-iommu.c
index e7bee11ecedc..dc82a1dbcb7c 100644
--- a/drivers/iommu/hyperv-iommu.c
+++ b/drivers/iommu/hyperv-iommu.c
@@ -182,7 +182,7 @@ static int __init hyperv_enable_irq_remapping(void)
 	return IRQ_REMAP_X2APIC_MODE;
 }
 
-static struct irq_domain *hyperv_get_ir_irq_domain(struct irq_alloc_info *info)
+static struct irq_domain *hyperv_get_irq_domain(struct irq_alloc_info *info)
 {
 	if (info->type == X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT)
 		return ioapic_ir_domain;
@@ -193,7 +193,7 @@ static struct irq_domain *hyperv_get_ir_irq_domain(struct irq_alloc_info *info)
 struct irq_remap_ops hyperv_irq_remap_ops = {
 	.prepare		= hyperv_prepare_irq_remapping,
 	.enable			= hyperv_enable_irq_remapping,
-	.get_ir_irq_domain	= hyperv_get_ir_irq_domain,
+	.get_irq_domain		= hyperv_get_irq_domain,
 };
 
 #endif
diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index d85656e93a46..0289a78b7b11 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -1137,7 +1137,6 @@ struct irq_remap_ops intel_irq_remap_ops = {
 	.disable		= disable_irq_remapping,
 	.reenable		= reenable_irq_remapping,
 	.enable_faulting	= enable_drhd_fault_handling,
-	.get_ir_irq_domain	= intel_get_irq_domain,
 	.get_irq_domain		= intel_get_irq_domain,
 };
 
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index 83f36f61416e..2d84b1ed205e 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -160,33 +160,12 @@ void panic_if_irq_remap(const char *msg)
 }
 
 /**
- * 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)
+struct irq_domain *irq_remapping_get_irq_domain(struct irq_alloc_info *info)
 {
 	if (!remap_ops || !remap_ops->get_irq_domain)
 		return NULL;
diff --git a/drivers/iommu/irq_remapping.h b/drivers/iommu/irq_remapping.h
index 6a190d504eb6..1661b3d75920 100644
--- a/drivers/iommu/irq_remapping.h
+++ b/drivers/iommu/irq_remapping.h
@@ -43,10 +43,7 @@ struct irq_remap_ops {
 	/* Enable fault handling */
 	int  (*enable_faulting)(void);
 
-	/* 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 */
+	/* Get the irqdomain associated to IOMMU device */
 	struct irq_domain *(*get_irq_domain)(struct irq_alloc_info *);
 };