[PATCH v3 29/35] x86: Kill all traces of irq_remapping_get_irq_domain()

David Woodhouse
2020-10-24T21:36:45Z

From: David Woodhouse <dwmw@amazon.co.uk>

All users are converted to use the fwspec based parent domain lookup.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/include/asm/hw_irq.h | 2 --
arch/x86/include/asm/irq_remapping.h | 9 --------
drivers/iommu/amd/iommu.c | 34 ----------------------------
drivers/iommu/hyperv-iommu.c | 9 --------
drivers/iommu/intel/irq_remapping.c | 17 --------------
drivers/iommu/irq_remapping.c | 14 ------------
drivers/iommu/irq_remapping.h | 3 ---
7 files changed, 88 deletions(-)

diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index 83a69f62637e..458f5a676402 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -40,8 +40,6 @@ enum irq_alloc_type {
X86_IRQ_ALLOC_TYPE_PCI_MSIX,
X86_IRQ_ALLOC_TYPE_DMAR,
X86_IRQ_ALLOC_TYPE_UV,
- X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT,
- X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT,
};

struct ioapic_alloc_info {
diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h
index af4a151d70b3..7cc49432187f 100644
--- a/arch/x86/include/asm/irq_remapping.h
+++ b/arch/x86/include/asm/irq_remapping.h
@@ -44,9 +44,6 @@ extern int irq_remapping_reenable(int);
extern int irq_remap_enable_fault_handling(void);
extern void panic_if_irq_remap(const char *msg);

-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. */
extern struct irq_domain *
arch_create_remap_msi_irq_domain(struct irq_domain *par, const char *n, int id);
@@ -71,11 +68,5 @@ static inline void panic_if_irq_remap(const char *msg)
{
}

-static inline struct irq_domain *
-irq_remapping_get_irq_domain(struct irq_alloc_info *info)
-{
- return NULL;
-}
-
#endif /* CONFIG_IRQ_REMAP */
#endif /* __X86_IRQ_REMAPPING_H */
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 31b22244e9c2..463d322a4f3b 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -3601,10 +3601,8 @@ static int get_devid(struct irq_alloc_info *info)
{
switch (info->type) {
case X86_IRQ_ALLOC_TYPE_IOAPIC:
- case X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT:
return get_ioapic_devid(info->devid);
case X86_IRQ_ALLOC_TYPE_HPET:
- case X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT:
return get_hpet_devid(info->devid);
case X86_IRQ_ALLOC_TYPE_PCI_MSI:
case X86_IRQ_ALLOC_TYPE_PCI_MSIX:
@@ -3615,44 +3613,12 @@ static int get_devid(struct irq_alloc_info *info)
}
}

-static struct irq_domain *get_irq_domain_for_devid(struct irq_alloc_info *info,
- int devid)
-{
- struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];
-
- if (!iommu)
- return NULL;
-
- switch (info->type) {
- case X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT:
- case X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT:
- return iommu->ir_domain;
- default:
- WARN_ON_ONCE(1);
- return NULL;
- }
-}
-
-static struct irq_domain *get_irq_domain(struct irq_alloc_info *info)
-{
- int devid;
-
- if (!info)
- return NULL;
-
- devid = get_devid(info);
- if (devid < 0)
- return NULL;
- return get_irq_domain_for_devid(info, devid);
-}
-
struct irq_remap_ops amd_iommu_irq_ops = {
.prepare = amd_iommu_prepare,
.enable = amd_iommu_enable,
.disable = amd_iommu_disable,
.reenable = amd_iommu_reenable,
.enable_faulting = amd_iommu_enable_faulting,
- .get_irq_domain = get_irq_domain,
};

static void fill_msi_msg(struct msi_msg *msg, u32 index)
diff --git a/drivers/iommu/hyperv-iommu.c b/drivers/iommu/hyperv-iommu.c
index 78a264ad9405..a629a6be65c7 100644
--- a/drivers/iommu/hyperv-iommu.c
+++ b/drivers/iommu/hyperv-iommu.c
@@ -160,18 +160,9 @@ static int __init hyperv_enable_irq_remapping(void)
return IRQ_REMAP_X2APIC_MODE;
}

-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;
- else
- return NULL;
-}
-
struct irq_remap_ops hyperv_irq_remap_ops = {
.prepare = hyperv_prepare_irq_remapping,
.enable = hyperv_enable_irq_remapping,
- .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 b3b079c0b51e..bca44015bc1d 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -1127,29 +1127,12 @@ static void prepare_irte(struct irte *irte, int vector, unsigned int dest)
irte->redir_hint = 1;
}

-static struct irq_domain *intel_get_irq_domain(struct irq_alloc_info *info)
-{
- if (!info)
- return NULL;
-
- switch (info->type) {
- case X86_IRQ_ALLOC_TYPE_IOAPIC_GET_PARENT:
- return map_ioapic_to_ir(info->devid);
- case X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT:
- return map_hpet_to_ir(info->devid);
- default:
- WARN_ON_ONCE(1);
- return NULL;
- }
-}
-
struct irq_remap_ops intel_irq_remap_ops = {
.prepare = intel_prepare_irq_remapping,
.enable = intel_enable_irq_remapping,
.disable = disable_irq_remapping,
.reenable = reenable_irq_remapping,
.enable_faulting = enable_drhd_fault_handling,
- .get_irq_domain = intel_get_irq_domain,
};

static void intel_ir_reconfigure_irte(struct irq_data *irqd, bool force)
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index 2d84b1ed205e..83314b9d8f38 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -158,17 +158,3 @@ void panic_if_irq_remap(const char *msg)
if (irq_remapping_enabled)
panic(msg);
}
-
-/**
- * irq_remapping_get_irq_domain - Get the irqdomain serving the request @info
- * @info: interrupt allocation information, used to identify the IOMMU device
- *
- * 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 1661b3d75920..8c89cb947cdb 100644
--- a/drivers/iommu/irq_remapping.h
+++ b/drivers/iommu/irq_remapping.h
@@ -42,9 +42,6 @@ struct irq_remap_ops {

/* Enable fault handling */
int (*enable_faulting)(void);
-
- /* Get the irqdomain associated to IOMMU device */
- struct irq_domain *(*get_irq_domain)(struct irq_alloc_info *);
};

extern struct irq_remap_ops intel_irq_remap_ops;