[PATCH V3 20/29] 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          | 16 ++++++++++++++++
 xen/include/asm-x86/viommu.h |  8 ++++++++
 xen/include/xen/viommu.h     | 14 ++++++++++++++
 3 files changed, 38 insertions(+)

diff --git a/xen/common/viommu.c b/xen/common/viommu.c
index b517158..0708e43 100644
--- a/xen/common/viommu.c
+++ b/xen/common/viommu.c
@@ -178,6 +178,22 @@ int viommu_handle_irq_request(struct domain *d,
     return viommu->ops->handle_irq_request(d, request);
 }
 
+int viommu_get_irq_info(struct domain *d,
+                        struct arch_irq_remapping_request *request,
+                        struct arch_irq_remapping_info *irq_info)
+{
+    struct viommu *viommu = d->viommu;
+
+    if ( !viommu )
+        return -EINVAL;
+
+    ASSERT(viommu->ops);
+    if ( !viommu->ops->get_irq_info )
+        return -EINVAL;
+
+    return viommu->ops->get_irq_info(d, request, irq_info);
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/xen/include/asm-x86/viommu.h b/xen/include/asm-x86/viommu.h
index 366fbb6..586b6bd 100644
--- a/xen/include/asm-x86/viommu.h
+++ b/xen/include/asm-x86/viommu.h
@@ -24,6 +24,14 @@
 #define VIOMMU_REQUEST_IRQ_MSI          0
 #define VIOMMU_REQUEST_IRQ_APIC         1
 
+struct arch_irq_remapping_info
+{
+    uint8_t  vector;
+    uint32_t dest;
+    uint32_t dest_mode:1;
+    uint32_t delivery_mode:3;
+};
+
 struct arch_irq_remapping_request
 {
     union {
diff --git a/xen/include/xen/viommu.h b/xen/include/xen/viommu.h
index 230f6b1..beb40cd 100644
--- a/xen/include/xen/viommu.h
+++ b/xen/include/xen/viommu.h
@@ -21,6 +21,7 @@
 #define __XEN_VIOMMU_H__
 
 struct viommu;
+struct arch_irq_remapping_info;
 struct arch_irq_remapping_request;
 
 struct viommu_ops {
@@ -28,6 +29,9 @@ struct viommu_ops {
     int (*destroy)(struct viommu *viommu);
     int (*handle_irq_request)(struct domain *d,
                               struct arch_irq_remapping_request *request);
+    int (*get_irq_info)(struct domain *d,
+                        struct arch_irq_remapping_request *request,
+                        struct arch_irq_remapping_info *info);
 };
 
 struct viommu {
@@ -50,6 +54,9 @@ int viommu_domctl(struct domain *d, struct xen_domctl_viommu_op *op,
                   bool_t *need_copy);
 int viommu_handle_irq_request(struct domain *d,
                               struct arch_irq_remapping_request *request);
+int viommu_get_irq_info(struct domain *d,
+                        struct arch_irq_remapping_request *request,
+                        struct arch_irq_remapping_info *irq_info);
 #else
 static inline int viommu_register_type(uint64_t type, struct viommu_ops *ops)
 {
@@ -61,6 +68,13 @@ viommu_handle_irq_request(struct domain *d,
 {
     return -EINVAL;
 }
+static inline int
+viommu_get_irq_info(struct domain *d,
+                    struct arch_irq_remapping_request *request,
+                    struct arch_irq_remapping_info *irq_info);
+{
+    return -EINVAL;
+}
 #endif
 
 #endif /* __XEN_VIOMMU_H__ */
-- 
1.8.3.1


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