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Subject[PATCH 06/10] iommu/vt-d: Convert free_irte into a remap_ops callback
Date
From: Joerg Roedel <joerg.roedel@amd.com>

The operation for releasing a remapping entry is iommu
specific too.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
---
arch/x86/include/asm/intr_remapping.h | 2 ++
arch/x86/kernel/apic/io_apic.c | 2 +-
drivers/iommu/intel_intr_remapping.c | 3 ++-
drivers/iommu/intr_remapping.c | 8 ++++++++
drivers/iommu/intr_remapping.h | 3 +++
include/linux/dmar.h | 5 -----
6 files changed, 16 insertions(+), 7 deletions(-)
diff --git a/arch/x86/include/asm/intr_remapping.h b/arch/x86/include/asm/intr_remapping.h
index ae933ec..a195b7d 100644
--- a/arch/x86/include/asm/intr_remapping.h
+++ b/arch/x86/include/asm/intr_remapping.h
@@ -43,6 +43,7 @@ extern int intr_setup_ioapic_entry(int irq,
extern int intr_set_affinity(struct irq_data *data,
const struct cpumask *mask,
bool force);
+extern void intr_free_irq(int irq);

#else /* CONFIG_IRQ_REMAP */

@@ -68,6 +69,7 @@ static inline int intr_set_affinity(struct irq_data *data,
{
return 0;
}
+static inline void intr_free_irq(int irq) { }
#endif /* CONFIG_IRQ_REMAP */

#endif /* __X86_INTR_REMAPPING_H */
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index a97c79a..5690469 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -3041,7 +3041,7 @@ void destroy_irq(unsigned int irq)
irq_set_status_flags(irq, IRQ_NOREQUEST|IRQ_NOPROBE);

if (irq_remapped(cfg))
- free_irte(irq);
+ intr_free_irq(irq);
raw_spin_lock_irqsave(&vector_lock, flags);
__clear_irq_vector(irq, cfg);
raw_spin_unlock_irqrestore(&vector_lock, flags);
diff --git a/drivers/iommu/intel_intr_remapping.c b/drivers/iommu/intel_intr_remapping.c
index 25372c1..44a6e04 100644
--- a/drivers/iommu/intel_intr_remapping.c
+++ b/drivers/iommu/intel_intr_remapping.c
@@ -253,7 +253,7 @@ static int clear_entries(struct irq_2_iommu *irq_iommu)
return qi_flush_iec(iommu, index, irq_iommu->irte_mask);
}

-int free_irte(int irq)
+static int free_irte(int irq)
{
struct irq_2_iommu *irq_iommu = irq_2_iommu(irq);
unsigned long flags;
@@ -964,4 +964,5 @@ struct irq_remap_ops intel_irq_remap_ops = {
.enable_faulting = enable_drhd_fault_handling,
.setup_ioapic_entry = intel_setup_ioapic_entry,
.set_affinity = intel_ioapic_set_affinity,
+ .free_irq = free_irte,
};
diff --git a/drivers/iommu/intr_remapping.c b/drivers/iommu/intr_remapping.c
index 2f4f27f..a68d304 100644
--- a/drivers/iommu/intr_remapping.c
+++ b/drivers/iommu/intr_remapping.c
@@ -119,3 +119,11 @@ int intr_set_affinity(struct irq_data *data, const struct cpumask *mask,

return remap_ops->set_affinity(data, mask, force);
}
+
+void intr_free_irq(int irq)
+{
+ if (!remap_ops || !remap_ops->free_irq)
+ return;
+
+ remap_ops->free_irq(irq);
+}
diff --git a/drivers/iommu/intr_remapping.h b/drivers/iommu/intr_remapping.h
index e0bc6e0..5748553 100644
--- a/drivers/iommu/intr_remapping.h
+++ b/drivers/iommu/intr_remapping.h
@@ -60,6 +60,9 @@ struct irq_remap_ops {
/* Set the CPU affinity of a remapped interrupt */
int (*set_affinity)(struct irq_data *data, const struct cpumask *mask,
bool force);
+
+ /* Free an IRQ */
+ int (*free_irq)(int);
};

extern struct irq_remap_ops intel_irq_remap_ops;
diff --git a/include/linux/dmar.h b/include/linux/dmar.h
index f2bd87f..7a207a3 100644
--- a/include/linux/dmar.h
+++ b/include/linux/dmar.h
@@ -121,7 +121,6 @@ extern int alloc_irte(struct intel_iommu *iommu, int irq, u16 count);
extern int set_irte_irq(int irq, struct intel_iommu *iommu, u16 index,
u16 sub_handle);
extern int map_irq_to_irte_handle(int irq, u16 *sub_handle);
-extern int free_irte(int irq);

extern struct intel_iommu *map_dev_to_ir(struct pci_dev *dev);
extern struct intel_iommu *map_ioapic_to_ir(int apic);
@@ -138,10 +137,6 @@ static inline int modify_irte(int irq, struct irte *irte_modified)
{
return -1;
}
-static inline int free_irte(int irq)
-{
- return -1;
-}
static inline int map_irq_to_irte_handle(int irq, u16 *sub_handle)
{
return -1;
--
1.7.6.5


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