[PATCH v3 09/37] vfio/common: Move giommu_list in base container

[Zhenzhong Duan <zhenzhong.duan@intel.com>]

From: Eric Auger <eric.auger@redhat.com>

Move the giommu_list field in the base object and store the
base container in the VFIOGuestIOMMU.

We introduce vfio_container_init/destroy helper on the base
container.

No fucntional change intended.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
[ clg: context changes ]
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
 include/hw/vfio/vfio-common.h         |  9 ---------
 include/hw/vfio/vfio-container-base.h | 13 +++++++++++++
 hw/vfio/common.c                      | 17 +++++++++++------
 hw/vfio/container-base.c              | 18 ++++++++++++++++++
 hw/vfio/container.c                   | 13 +++----------
 5 files changed, 45 insertions(+), 25 deletions(-)

diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index 97056224f4..fcb4003a21 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -95,7 +95,6 @@ typedef struct VFIOContainer {
     uint64_t max_dirty_bitmap_size;
     unsigned long pgsizes;
     unsigned int dma_max_mappings;
-    QLIST_HEAD(, VFIOGuestIOMMU) giommu_list;
     QLIST_HEAD(, VFIOHostDMAWindow) hostwin_list;
     QLIST_HEAD(, VFIOGroup) group_list;
     QLIST_HEAD(, VFIORamDiscardListener) vrdl_list;
@@ -104,14 +103,6 @@ typedef struct VFIOContainer {
     GList *iova_ranges;
 } VFIOContainer;
 
-typedef struct VFIOGuestIOMMU {
-    VFIOContainer *container;
-    IOMMUMemoryRegion *iommu_mr;
-    hwaddr iommu_offset;
-    IOMMUNotifier n;
-    QLIST_ENTRY(VFIOGuestIOMMU) giommu_next;
-} VFIOGuestIOMMU;
-
 typedef struct VFIORamDiscardListener {
     VFIOContainer *container;
     MemoryRegion *mr;
diff --git a/include/hw/vfio/vfio-container-base.h b/include/hw/vfio/vfio-container-base.h
index 077e638ee8..71e1e4324e 100644
--- a/include/hw/vfio/vfio-container-base.h
+++ b/include/hw/vfio/vfio-container-base.h
@@ -43,8 +43,17 @@ typedef struct {
  */
 typedef struct VFIOContainerBase {
     const VFIOIOMMUOps *ops;
+    QLIST_HEAD(, VFIOGuestIOMMU) giommu_list;
 } VFIOContainerBase;
 
+typedef struct VFIOGuestIOMMU {
+    VFIOContainerBase *bcontainer;
+    IOMMUMemoryRegion *iommu_mr;
+    hwaddr iommu_offset;
+    IOMMUNotifier n;
+    QLIST_ENTRY(VFIOGuestIOMMU) giommu_next;
+} VFIOGuestIOMMU;
+
 int vfio_container_dma_map(VFIOContainerBase *bcontainer,
                            hwaddr iova, ram_addr_t size,
                            void *vaddr, bool readonly);
@@ -52,6 +61,10 @@ int vfio_container_dma_unmap(VFIOContainerBase *bcontainer,
                              hwaddr iova, ram_addr_t size,
                              IOMMUTLBEntry *iotlb);
 
+void vfio_container_init(VFIOContainerBase *bcontainer,
+                         const VFIOIOMMUOps *ops);
+void vfio_container_destroy(VFIOContainerBase *bcontainer);
+
 struct VFIOIOMMUOps {
     /* basic feature */
     int (*dma_map)(VFIOContainerBase *bcontainer,
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 141f2b54a4..4f130ad87c 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -292,7 +292,7 @@ static bool vfio_get_xlat_addr(IOMMUTLBEntry *iotlb, void **vaddr,
 static void vfio_iommu_map_notify(IOMMUNotifier *n, IOMMUTLBEntry *iotlb)
 {
     VFIOGuestIOMMU *giommu = container_of(n, VFIOGuestIOMMU, n);
-    VFIOContainerBase *bcontainer = &giommu->container->bcontainer;
+    VFIOContainerBase *bcontainer = giommu->bcontainer;
     hwaddr iova = iotlb->iova + giommu->iommu_offset;
     void *vaddr;
     int ret;
@@ -569,6 +569,7 @@ static void vfio_listener_region_add(MemoryListener *listener,
                                      MemoryRegionSection *section)
 {
     VFIOContainer *container = container_of(listener, VFIOContainer, listener);
+    VFIOContainerBase *bcontainer = &container->bcontainer;
     hwaddr iova, end;
     Int128 llend, llsize;
     void *vaddr;
@@ -613,7 +614,7 @@ static void vfio_listener_region_add(MemoryListener *listener,
         giommu->iommu_mr = iommu_mr;
         giommu->iommu_offset = section->offset_within_address_space -
                                section->offset_within_region;
-        giommu->container = container;
+        giommu->bcontainer = bcontainer;
         llend = int128_add(int128_make64(section->offset_within_region),
                            section->size);
         llend = int128_sub(llend, int128_one());
@@ -648,7 +649,7 @@ static void vfio_listener_region_add(MemoryListener *listener,
             g_free(giommu);
             goto fail;
         }
-        QLIST_INSERT_HEAD(&container->giommu_list, giommu, giommu_next);
+        QLIST_INSERT_HEAD(&bcontainer->giommu_list, giommu, giommu_next);
         memory_region_iommu_replay(giommu->iommu_mr, &giommu->n);
 
         return;
@@ -733,6 +734,7 @@ static void vfio_listener_region_del(MemoryListener *listener,
                                      MemoryRegionSection *section)
 {
     VFIOContainer *container = container_of(listener, VFIOContainer, listener);
+    VFIOContainerBase *bcontainer = &container->bcontainer;
     hwaddr iova, end;
     Int128 llend, llsize;
     int ret;
@@ -745,7 +747,7 @@ static void vfio_listener_region_del(MemoryListener *listener,
     if (memory_region_is_iommu(section->mr)) {
         VFIOGuestIOMMU *giommu;
 
-        QLIST_FOREACH(giommu, &container->giommu_list, giommu_next) {
+        QLIST_FOREACH(giommu, &bcontainer->giommu_list, giommu_next) {
             if (MEMORY_REGION(giommu->iommu_mr) == section->mr &&
                 giommu->n.start == section->offset_within_region) {
                 memory_region_unregister_iommu_notifier(section->mr,
@@ -1208,7 +1210,9 @@ static void vfio_iommu_map_dirty_notify(IOMMUNotifier *n, IOMMUTLBEntry *iotlb)
     vfio_giommu_dirty_notifier *gdn = container_of(n,
                                                 vfio_giommu_dirty_notifier, n);
     VFIOGuestIOMMU *giommu = gdn->giommu;
-    VFIOContainer *container = giommu->container;
+    VFIOContainerBase *bcontainer = giommu->bcontainer;
+    VFIOContainer *container = container_of(bcontainer, VFIOContainer,
+                                            bcontainer);
     hwaddr iova = iotlb->iova + giommu->iommu_offset;
     ram_addr_t translated_addr;
     int ret = -EINVAL;
@@ -1286,12 +1290,13 @@ static int vfio_sync_ram_discard_listener_dirty_bitmap(VFIOContainer *container,
 static int vfio_sync_dirty_bitmap(VFIOContainer *container,
                                   MemoryRegionSection *section)
 {
+    VFIOContainerBase *bcontainer = &container->bcontainer;
     ram_addr_t ram_addr;
 
     if (memory_region_is_iommu(section->mr)) {
         VFIOGuestIOMMU *giommu;
 
-        QLIST_FOREACH(giommu, &container->giommu_list, giommu_next) {
+        QLIST_FOREACH(giommu, &bcontainer->giommu_list, giommu_next) {
             if (MEMORY_REGION(giommu->iommu_mr) == section->mr &&
                 giommu->n.start == section->offset_within_region) {
                 Int128 llend;
diff --git a/hw/vfio/container-base.c b/hw/vfio/container-base.c
index 9db8b89b2f..6be7ce65ad 100644
--- a/hw/vfio/container-base.c
+++ b/hw/vfio/container-base.c
@@ -47,3 +47,21 @@ int vfio_container_dma_unmap(VFIOContainerBase *bcontainer,
 
     return bcontainer->ops->dma_unmap(bcontainer, iova, size, iotlb);
 }
+
+void vfio_container_init(VFIOContainerBase *bcontainer, const VFIOIOMMUOps *ops)
+{
+    bcontainer->ops = ops;
+    QLIST_INIT(&bcontainer->giommu_list);
+}
+
+void vfio_container_destroy(VFIOContainerBase *bcontainer)
+{
+    VFIOGuestIOMMU *giommu, *tmp;
+
+    QLIST_FOREACH_SAFE(giommu, &bcontainer->giommu_list, giommu_next, tmp) {
+        memory_region_unregister_iommu_notifier(
+                MEMORY_REGION(giommu->iommu_mr), &giommu->n);
+        QLIST_REMOVE(giommu, giommu_next);
+        g_free(giommu);
+    }
+}
diff --git a/hw/vfio/container.c b/hw/vfio/container.c
index c04df26323..b2b6e05287 100644
--- a/hw/vfio/container.c
+++ b/hw/vfio/container.c
@@ -556,10 +556,9 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as,
     container->dirty_pages_supported = false;
     container->dma_max_mappings = 0;
     container->iova_ranges = NULL;
-    QLIST_INIT(&container->giommu_list);
     QLIST_INIT(&container->vrdl_list);
     bcontainer = &container->bcontainer;
-    bcontainer->ops = &vfio_legacy_ops;
+    vfio_container_init(bcontainer, &vfio_legacy_ops);
 
     ret = vfio_init_container(container, group->fd, errp);
     if (ret) {
@@ -661,6 +660,7 @@ put_space_exit:
 static void vfio_disconnect_container(VFIOGroup *group)
 {
     VFIOContainer *container = group->container;
+    VFIOContainerBase *bcontainer = &container->bcontainer;
 
     QLIST_REMOVE(group, container_next);
     group->container = NULL;
@@ -685,16 +685,9 @@ static void vfio_disconnect_container(VFIOGroup *group)
 
     if (QLIST_EMPTY(&container->group_list)) {
         VFIOAddressSpace *space = container->space;
-        VFIOGuestIOMMU *giommu, *tmp;
 
         QLIST_REMOVE(container, next);
-
-        QLIST_FOREACH_SAFE(giommu, &container->giommu_list, giommu_next, tmp) {
-            memory_region_unregister_iommu_notifier(
-                    MEMORY_REGION(giommu->iommu_mr), &giommu->n);
-            QLIST_REMOVE(giommu, giommu_next);
-            g_free(giommu);
-        }
+        vfio_container_destroy(bcontainer);
 
         trace_vfio_disconnect_container(container->fd);
         close(container->fd);
-- 
2.34.1