[PATCH v3 30/32] hw/arm/smmuv3-accel: Introduce helper to query CMDQV type

[Shameer Kolothum <skolothumtho@nvidia.com>]

Introduce a SMMUv3AccelCmdqvType enum and a helper to query the
CMDQV implementation type associated with an accelerated SMMUv3
instance.

A subsequent patch will use this helper when generating the
Tegra241 CMDQV DSDT.

Signed-off-by: Shameer Kolothum <skolothumtho@nvidia.com>
---
 hw/arm/smmuv3-accel.h       |  7 +++++++
 hw/arm/smmuv3-accel-stubs.c |  5 +++++
 hw/arm/smmuv3-accel.c       | 12 ++++++++++++
 hw/arm/tegra241-cmdqv.c     |  6 ++++++
 4 files changed, 30 insertions(+)

diff --git a/hw/arm/smmuv3-accel.h b/hw/arm/smmuv3-accel.h
index c349981e79..6d21788006 100644
--- a/hw/arm/smmuv3-accel.h
+++ b/hw/arm/smmuv3-accel.h
@@ -15,6 +15,11 @@
 #include <linux/iommufd.h>
 #endif
 
+typedef enum SMMUv3AccelCmdqvType {
+    SMMUV3_CMDQV_NONE = 0,
+    SMMUV3_CMDQV_TEGRA241,
+} SMMUv3AccelCmdqvType;
+
 /*
  * CMDQ-Virtualization (CMDQV) hardware support, extends the SMMUv3 to
  * support multiple VCMDQs with virtualization capabilities.
@@ -30,6 +35,7 @@ typedef struct SMMUv3AccelCmdqvOps {
     void (*free_viommu)(SMMUv3State *s);
     bool (*alloc_veventq)(SMMUv3State *s,  Error **errp);
     void (*free_veventq)(SMMUv3State *s);
+    SMMUv3AccelCmdqvType (*get_type)(void);
     void (*reset)(SMMUv3State *s);
 } SMMUv3AccelCmdqvOps;
 
@@ -73,5 +79,6 @@ bool smmuv3_accel_alloc_veventq(SMMUv3State *s, Error **errp);
 bool smmuv3_accel_event_read_validate(IOMMUFDVeventq *veventq, uint32_t type,
                                       void *buf, size_t size, Error **errp);
 void smmuv3_accel_reset(SMMUv3State *s);
+SMMUv3AccelCmdqvType smmuv3_accel_cmdqv_type(Object *obj);
 
 #endif /* HW_ARM_SMMUV3_ACCEL_H */
diff --git a/hw/arm/smmuv3-accel-stubs.c b/hw/arm/smmuv3-accel-stubs.c
index 1d5d3bb10c..5ca94d605f 100644
--- a/hw/arm/smmuv3-accel-stubs.c
+++ b/hw/arm/smmuv3-accel-stubs.c
@@ -55,3 +55,8 @@ void smmuv3_accel_idr_override(SMMUv3State *s)
 void smmuv3_accel_reset(SMMUv3State *s)
 {
 }
+
+SMMUv3AccelCmdqvType smmuv3_accel_cmdqv_type(Object *obj)
+{
+    return SMMUV3_CMDQV_NONE;
+}
diff --git a/hw/arm/smmuv3-accel.c b/hw/arm/smmuv3-accel.c
index 9a570b8af9..585b460943 100644
--- a/hw/arm/smmuv3-accel.c
+++ b/hw/arm/smmuv3-accel.c
@@ -998,6 +998,18 @@ static void smmuv3_accel_as_init(SMMUv3State *s)
     address_space_init(shared_as_sysmem, &root, "smmuv3-accel-as-sysmem");
 }
 
+SMMUv3AccelCmdqvType smmuv3_accel_cmdqv_type(Object *obj)
+{
+    SMMUv3State *s = ARM_SMMUV3(obj);
+    SMMUv3AccelState *accel = s->s_accel;
+
+    if (!accel || !accel->cmdqv_ops || !accel->cmdqv_ops->get_type) {
+        return SMMUV3_CMDQV_NONE;
+    }
+
+    return accel->cmdqv_ops->get_type();
+}
+
 bool smmuv3_accel_init(SMMUv3State *s, Error **errp)
 {
     SMMUState *bs = ARM_SMMU(s);
diff --git a/hw/arm/tegra241-cmdqv.c b/hw/arm/tegra241-cmdqv.c
index a379341c0a..42d7dbfde7 100644
--- a/hw/arm/tegra241-cmdqv.c
+++ b/hw/arm/tegra241-cmdqv.c
@@ -736,6 +736,11 @@ static bool tegra241_cmdqv_init(SMMUv3State *s, Error **errp)
     return true;
 }
 
+static SMMUv3AccelCmdqvType tegra241_cmdqv_get_type(void)
+{
+    return SMMUV3_CMDQV_TEGRA241;
+};
+
 static bool tegra241_cmdqv_probe(SMMUv3State *s, HostIOMMUDeviceIOMMUFD *idev,
                                  Error **errp)
 {
@@ -778,6 +783,7 @@ static const SMMUv3AccelCmdqvOps tegra241_cmdqv_ops = {
     .free_viommu = tegra241_cmdqv_free_viommu,
     .alloc_veventq = tegra241_cmdqv_alloc_veventq,
     .free_veventq = tegra241_cmdqv_free_veventq,
+    .get_type = tegra241_cmdqv_get_type,
     .reset = tegra241_cmdqv_reset,
 };
 
-- 
2.43.0