[PATCH v4 2/8] tpm: Extend TPMIfClass with get_irqnum() function

[Stefan Berger <stefanb@linux.vnet.ibm.com>]

From: Stefan Berger <stefanb@sbct-2.pok.ibm.com>

Implement get_irqnum() as part of the TPMIfClass to get the assigned IRQ
number or TPM_IRQ_DISABLED (~0) in case IRQs cannot be used.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20200616205721.1191408-3-stefanb@linux.vnet.ibm.com
---
 hw/tpm/tpm_tis_isa.c    |  9 +++++++++
 hw/tpm/tpm_tis_sysbus.c |  9 +++++++++
 include/sysemu/tpm.h    | 12 ++++++++++++
 3 files changed, 30 insertions(+)

diff --git a/hw/tpm/tpm_tis_isa.c b/hw/tpm/tpm_tis_isa.c
index 30ba37079d..ed6d422f05 100644
--- a/hw/tpm/tpm_tis_isa.c
+++ b/hw/tpm/tpm_tis_isa.c
@@ -80,6 +80,14 @@ static enum TPMVersion tpm_tis_isa_get_tpm_version(TPMIf *ti)
     return tpm_tis_get_tpm_version(s);
 }
 
+static int8_t tpm_tis_isa_get_irqnum(TPMIf *ti)
+{
+    TPMStateISA *isadev = TPM_TIS_ISA(ti);
+    TPMState *s = &isadev->state;
+
+    return s->irq_num;
+}
+
 static void tpm_tis_isa_reset(DeviceState *dev)
 {
     TPMStateISA *isadev = TPM_TIS_ISA(dev);
@@ -148,6 +156,7 @@ static void tpm_tis_isa_class_init(ObjectClass *klass, void *data)
     dc->reset = tpm_tis_isa_reset;
     tc->request_completed = tpm_tis_isa_request_completed;
     tc->get_version = tpm_tis_isa_get_tpm_version;
+    tc->get_irqnum = tpm_tis_isa_get_irqnum;
 }
 
 static const TypeInfo tpm_tis_isa_info = {
diff --git a/hw/tpm/tpm_tis_sysbus.c b/hw/tpm/tpm_tis_sysbus.c
index eced1fc843..86b3988be5 100644
--- a/hw/tpm/tpm_tis_sysbus.c
+++ b/hw/tpm/tpm_tis_sysbus.c
@@ -80,6 +80,14 @@ static enum TPMVersion tpm_tis_sysbus_get_tpm_version(TPMIf *ti)
     return tpm_tis_get_tpm_version(s);
 }
 
+static int8_t tpm_tis_sysbus_get_irqnum(TPMIf *ti)
+{
+    TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(ti);
+    TPMState *s = &sbdev->state;
+
+    return s->irq_num;
+}
+
 static void tpm_tis_sysbus_reset(DeviceState *dev)
 {
     TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(dev);
@@ -137,6 +145,7 @@ static void tpm_tis_sysbus_class_init(ObjectClass *klass, void *data)
     dc->reset = tpm_tis_sysbus_reset;
     tc->request_completed = tpm_tis_sysbus_request_completed;
     tc->get_version = tpm_tis_sysbus_get_tpm_version;
+    tc->get_irqnum = tpm_tis_sysbus_get_irqnum;
 }
 
 static const TypeInfo tpm_tis_sysbus_info = {
diff --git a/include/sysemu/tpm.h b/include/sysemu/tpm.h
index 03fb25941c..7ebe9f7ef0 100644
--- a/include/sysemu/tpm.h
+++ b/include/sysemu/tpm.h
@@ -25,6 +25,8 @@ typedef enum TPMVersion {
     TPM_VERSION_2_0 = 2,
 } TPMVersion;
 
+#define TPM_IRQ_DISABLED  ~0
+
 #define TYPE_TPM_IF "tpm-if"
 #define TPM_IF_CLASS(klass)                                 \
     OBJECT_CLASS_CHECK(TPMIfClass, (klass), TYPE_TPM_IF)
@@ -41,6 +43,7 @@ typedef struct TPMIfClass {
     enum TpmModel model;
     void (*request_completed)(TPMIf *obj, int ret);
     enum TPMVersion (*get_version)(TPMIf *obj);
+    int8_t (*get_irqnum)(TPMIf *obj);
 } TPMIfClass;
 
 #define TYPE_TPM_TIS_ISA            "tpm-tis"
@@ -74,4 +77,13 @@ static inline TPMVersion tpm_get_version(TPMIf *ti)
     return TPM_IF_GET_CLASS(ti)->get_version(ti);
 }
 
+static inline int8_t tpm_get_irqnum(TPMIf *ti)
+{
+    if (!ti || !TPM_IF_GET_CLASS(ti)->get_irqnum) {
+        return TPM_IRQ_DISABLED;
+    }
+
+    return TPM_IF_GET_CLASS(ti)->get_irqnum(ti);
+}
+
 #endif /* QEMU_TPM_H */
-- 
2.24.1