[PATCH v3 3/4] Update SMMU v3 creation to support non PCI/PCIe device connection

[PATCH v3 3/4] Update SMMU v3 creation to support non PCI/PCIe device connection

[Li, Chunming]

From: LCM <chunming.li@verisilicon.com>

  . Add sid-map property to store non PCI/PCIe devices SID
  . Create IOMMU memory regions for non PCI/PCIe devices based on their SID
  . Update SID getting strategy for PCI/PCIe and non PCI/PCIe devices

Signed-off-by: Chunming Li <chunming.li@verisilicon.com>
Signed-off-by: Renwei Liu <renwei.liu@verisilicon.com>
---
 hw/arm/smmuv3.c              | 46 ++++++++++++++++++++++++++++++++++++
 include/hw/arm/smmu-common.h |  7 +++++-
 include/hw/arm/smmuv3.h      |  2 ++
 3 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index 01b60bee4..11d7fe842 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -32,6 +32,7 @@
 #include "hw/arm/smmuv3.h"
 #include "smmuv3-internal.h"
 #include "smmu-internal.h"
+#include "hw/qdev-properties.h"
 
 /**
  * smmuv3_trigger_irq - pulse @irq if enabled and update
@@ -1430,6 +1431,19 @@ static void smmu_reset(DeviceState *dev)
     smmuv3_init_regs(s);
 }
 
+static SMMUDevice *smmu_find_peri_sdev(SMMUState *s, uint16_t sid)
+{
+    SMMUDevice *sdev;
+
+    QLIST_FOREACH(sdev, &s->peri_sdev_list, next) {
+        if (smmu_get_sid(sdev) == sid) {
+            return sdev;
+        }
+    }
+
+    return NULL;
+}
+
 static void smmu_realize(DeviceState *d, Error **errp)
 {
     SMMUState *sys = ARM_SMMU(d);
@@ -1437,6 +1451,9 @@ static void smmu_realize(DeviceState *d, Error **errp)
     SMMUv3Class *c = ARM_SMMUV3_GET_CLASS(s);
     SysBusDevice *dev = SYS_BUS_DEVICE(d);
     Error *local_err = NULL;
+    SMMUDevice *sdev;
+    char *name = NULL;
+    uint16_t sid = 0;
 
     c->parent_realize(d, &local_err);
     if (local_err) {
@@ -1454,6 +1471,28 @@ static void smmu_realize(DeviceState *d, Error **errp)
     sysbus_init_mmio(dev, &sys->iomem);
 
     smmu_init_irq(s, dev);
+
+    /* Create IOMMU memory region for peripheral devices based on their SID */
+    for (int i = 0; i < s->num_sid; i++) {
+        sid = s->sid_map[i];
+        sdev = smmu_find_peri_sdev(sys, sid);
+        if (sdev) {
+            continue;
+        }
+
+        sdev = g_new0(SMMUDevice, 1);
+        sdev->smmu = sys;
+        sdev->bus = NULL;
+        sdev->devfn = sid;
+
+        name = g_strdup_printf("%s-peri-%d", sys->mrtypename, sid);
+        memory_region_init_iommu(&sdev->iommu, sizeof(sdev->iommu),
+                                 sys->mrtypename,
+                                 OBJECT(sys), name, 1ULL << SMMU_MAX_VA_BITS);
+
+        QLIST_INSERT_HEAD(&sys->peri_sdev_list, sdev, next);
+        g_free(name);
+    }
 }
 
 static const VMStateDescription vmstate_smmuv3_queue = {
@@ -1506,6 +1545,12 @@ static void smmuv3_instance_init(Object *obj)
     /* Nothing much to do here as of now */
 }
 
+static Property smmuv3_properties[] = {
+    DEFINE_PROP_ARRAY("sid-map", SMMUv3State, num_sid, sid_map,
+                      qdev_prop_uint16, uint16_t),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
 static void smmuv3_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -1515,6 +1560,7 @@ static void smmuv3_class_init(ObjectClass *klass, void *data)
     device_class_set_parent_reset(dc, smmu_reset, &c->parent_reset);
     c->parent_realize = dc->realize;
     dc->realize = smmu_realize;
+    device_class_set_props(dc, smmuv3_properties);
 }
 
 static int smmuv3_notify_flag_changed(IOMMUMemoryRegion *iommu,
diff --git a/include/hw/arm/smmu-common.h b/include/hw/arm/smmu-common.h
index 706be3c6d..95cd12a4b 100644
--- a/include/hw/arm/smmu-common.h
+++ b/include/hw/arm/smmu-common.h
@@ -117,6 +117,7 @@ struct SMMUState {
     QLIST_HEAD(, SMMUDevice) devices_with_notifiers;
     uint8_t bus_num;
     PCIBus *primary_bus;
+    QLIST_HEAD(, SMMUDevice) peri_sdev_list;
 };
 
 struct SMMUBaseClass {
@@ -138,7 +139,11 @@ SMMUPciBus *smmu_find_smmu_pcibus(SMMUState *s, uint8_t bus_num);
 /* Return the stream ID of an SMMU device */
 static inline uint16_t smmu_get_sid(SMMUDevice *sdev)
 {
-    return PCI_BUILD_BDF(pci_bus_num(sdev->bus), sdev->devfn);
+    if (sdev->bus == NULL) {
+        return sdev->devfn;
+    } else {
+        return PCI_BUILD_BDF(pci_bus_num(sdev->bus), sdev->devfn);
+    }
 }
 
 /**
diff --git a/include/hw/arm/smmuv3.h b/include/hw/arm/smmuv3.h
index c641e6073..32ba84990 100644
--- a/include/hw/arm/smmuv3.h
+++ b/include/hw/arm/smmuv3.h
@@ -39,6 +39,8 @@ struct SMMUv3State {
     uint32_t features;
     uint8_t sid_size;
     uint8_t sid_split;
+    uint32_t num_sid;
+    uint16_t *sid_map;
 
     uint32_t idr[6];
     uint32_t iidr;
--