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Subject[tip: x86/irq] iommu/irq_remapping: Consolidate irq domain lookup
The following commit has been merged into the x86/irq branch of tip:

Commit-ID: 6b6256e616f7e10c4434cfcd32371fc33ca94e48
Gitweb: https://git.kernel.org/tip/6b6256e616f7e10c4434cfcd32371fc33ca94e48
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Wed, 26 Aug 2020 13:16:39 +02:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Wed, 16 Sep 2020 16:52:30 +02:00

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
---
arch/x86/include/asm/irq_remapping.h | 8 --------
arch/x86/kernel/apic/io_apic.c | 2 +-
arch/x86/kernel/apic/msi.c | 2 +-
drivers/iommu/amd/iommu.c | 1 -
drivers/iommu/hyperv-iommu.c | 4 ++--
drivers/iommu/intel/irq_remapping.c | 1 -
drivers/iommu/irq_remapping.c | 23 +----------------------
drivers/iommu/irq_remapping.h | 5 +----
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 4bc985f..af4a151 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 be01bb6..20ba0b7 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 421c016..9edb1bb 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 4d4045a..18b4dfb 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 e7bee11..dc82a1d 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 d85656e..0289a78 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 83f36f6..2d84b1e 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 6a190d5..1661b3d 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 *);
};

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