[PATCH v7 07/28] xen/arm: ITS: Introduce msi_desc for LPIs

[vijay.kilari@gmail.com]

From: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>

Define msi_desc structure for arm and introduce
helper functions to access msi_desc member variables.

Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>
Reviewed-by: Julien Grall <julien.grall@citrix.com>
---
 xen/arch/arm/gic-v3-its.c     |   28 ++++++++++++++++++++++++++++
 xen/arch/arm/irq.c            |   12 ++++++++++++
 xen/include/asm-arm/gic-its.h |    4 ++++
 xen/include/asm-arm/irq.h     |    9 +++++++++
 4 files changed, 53 insertions(+)

diff --git a/xen/arch/arm/gic-v3-its.c b/xen/arch/arm/gic-v3-its.c
index b983297..4b7d9ed 100644
--- a/xen/arch/arm/gic-v3-its.c
+++ b/xen/arch/arm/gic-v3-its.c
@@ -109,6 +109,34 @@ static void dump_cmd(const its_cmd_block *cmd)
 static void dump_cmd(const its_cmd_block *cmd) { }
 #endif
 
+void irqdesc_set_lpi_event(struct irq_desc *desc, unsigned id)
+{
+    ASSERT(spin_is_locked(&desc->lock));
+
+    irq_get_msi_desc(desc)->eventID = id;
+}
+
+unsigned int irqdesc_get_lpi_event(struct irq_desc *desc)
+{
+    ASSERT(spin_is_locked(&desc->lock));
+
+    return irq_get_msi_desc(desc)->eventID;
+}
+
+struct its_device *irqdesc_get_its_device(struct irq_desc *desc)
+{
+    ASSERT(spin_is_locked(&desc->lock));
+
+    return irq_get_msi_desc(desc)->dev;
+}
+
+void irqdesc_set_its_device(struct irq_desc *desc, struct its_device *dev)
+{
+    ASSERT(spin_is_locked(&desc->lock));
+
+    irq_get_msi_desc(desc)->dev = dev;
+}
+
 static struct its_collection *dev_event_to_col(struct its_device *dev,
                                                u32 event)
 {
diff --git a/xen/arch/arm/irq.c b/xen/arch/arm/irq.c
index 9b48d9c..d582f57 100644
--- a/xen/arch/arm/irq.c
+++ b/xen/arch/arm/irq.c
@@ -143,6 +143,18 @@ static inline struct domain *irq_get_domain(struct irq_desc *desc)
     return irq_get_guest_info(desc)->d;
 }
 
+void irq_set_msi_desc(struct irq_desc *desc, struct msi_desc *msi)
+{
+    desc->msi_desc = msi;
+}
+
+struct msi_desc *irq_get_msi_desc(struct irq_desc *desc)
+{
+    ASSERT(desc->msi_desc != NULL);
+
+    return desc->msi_desc;
+}
+
 void irq_set_affinity(struct irq_desc *desc, const cpumask_t *cpu_mask)
 {
     if ( desc != NULL )
diff --git a/xen/include/asm-arm/gic-its.h b/xen/include/asm-arm/gic-its.h
index 8b84ae2..c632854 100644
--- a/xen/include/asm-arm/gic-its.h
+++ b/xen/include/asm-arm/gic-its.h
@@ -271,6 +271,10 @@ struct its_device {
     struct rb_node          node;
 };
 
+void irqdesc_set_lpi_event(struct irq_desc *desc, unsigned id);
+unsigned int irqdesc_get_lpi_event(struct irq_desc *desc);
+struct its_device *irqdesc_get_its_device(struct irq_desc *desc);
+void irqdesc_set_its_device(struct irq_desc *desc, struct its_device *dev);
 int its_init(struct rdist_prop *rdists);
 int its_cpu_init(void);
 
diff --git a/xen/include/asm-arm/irq.h b/xen/include/asm-arm/irq.h
index 9be83b4..bafcd30 100644
--- a/xen/include/asm-arm/irq.h
+++ b/xen/include/asm-arm/irq.h
@@ -18,6 +18,13 @@ struct arch_irq_desc {
     unsigned int type;
 };
 
+struct msi_desc {
+#ifdef HAS_GICV3
+    unsigned int eventID;
+    struct its_device *dev;
+#endif
+};
+
 #define NR_LOCAL_IRQS	32
 /* Number of SGIs + PPIs + SPIs */
 #define NR_ITLINES	1024
@@ -56,6 +63,8 @@ int irq_set_spi_type(unsigned int spi, unsigned int type);
 int platform_get_irq(const struct dt_device_node *device, int index);
 
 void irq_set_affinity(struct irq_desc *desc, const cpumask_t *cpu_mask);
+void irq_set_msi_desc(struct irq_desc *desc, struct msi_desc *msi);
+struct msi_desc *irq_get_msi_desc(struct irq_desc *desc);
 
 #endif /* _ASM_HW_IRQ_H */
 /*
-- 
1.7.9.5