[RFC PATCH 4/23] VIOMMU: Add get irq info callback to convert irq remapping request

[Lan Tianyu <tianyu.lan@intel.com>]

This patch is to add get_irq_info callback for platform implementation
to convert irq remapping request to irq info (E,G vector, dest, dest_mode
and so on).

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
---
 xen/common/viommu.c          | 11 +++++++++++
 xen/include/asm-arm/viommu.h |  4 ++++
 xen/include/asm-x86/viommu.h |  8 ++++++++
 xen/include/xen/viommu.h     |  4 ++++
 4 files changed, 27 insertions(+)

diff --git a/xen/common/viommu.c b/xen/common/viommu.c
index 62c66db..dbec692 100644
--- a/xen/common/viommu.c
+++ b/xen/common/viommu.c
@@ -98,6 +98,17 @@ int viommu_handle_irq_request(struct domain *d,
     return info->ops->handle_irq_request(d, request);
 }
 
+int viommu_get_irq_info(struct domain *d, struct irq_remapping_request *request,
+                        struct irq_remapping_info *irq_info)
+{
+    struct viommu_info *info = &d->viommu;
+
+    if ( !info || !info->ops || !info->ops->get_irq_info)
+        return -EINVAL;
+
+    return info->ops->get_irq_info(d, request, irq_info);
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/xen/include/asm-arm/viommu.h b/xen/include/asm-arm/viommu.h
index 6a81ecb..6ce4e0a 100644
--- a/xen/include/asm-arm/viommu.h
+++ b/xen/include/asm-arm/viommu.h
@@ -22,6 +22,10 @@
 
 #include <xen/viommu.h>
 
+struct irq_remapping_info
+{
+};
+
 struct irq_remapping_request
 {
 };
diff --git a/xen/include/asm-x86/viommu.h b/xen/include/asm-x86/viommu.h
index b6e01a5..43e446e 100644
--- a/xen/include/asm-x86/viommu.h
+++ b/xen/include/asm-x86/viommu.h
@@ -23,6 +23,14 @@
 #include <xen/viommu.h>
 #include <asm/types.h>
 
+struct irq_remapping_info
+{
+    u8  vector;
+    u32 dest;
+    u32 dest_mode:1;
+    u32 delivery_mode:3;
+};
+
 struct irq_remapping_request
 {
     u8 type;
diff --git a/xen/include/xen/viommu.h b/xen/include/xen/viommu.h
index 246b29d..d733012 100644
--- a/xen/include/xen/viommu.h
+++ b/xen/include/xen/viommu.h
@@ -42,6 +42,8 @@ struct viommu_ops {
     int (*destroy)(struct viommu *viommu);
     int (*handle_irq_request)(struct domain *d,
                               struct irq_remapping_request *request);
+    int (*get_irq_info)(struct domain *d, struct irq_remapping_request *request,
+                        struct irq_remapping_info *info);
 };
 
 struct viommu_info {
@@ -56,6 +58,8 @@ int viommu_destroy(struct domain *d, u32 viommu_id);
 u64 viommu_query_caps(struct domain *d);
 int viommu_handle_irq_request(struct domain *d,
                               struct irq_remapping_request *request);
+int viommu_get_irq_info(struct domain *d, struct irq_remapping_request *request,
+                        struct irq_remapping_info *irq_info);
 
 #endif /* __XEN_VIOMMU_H__ */
 
-- 
1.8.3.1


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