[Qemu-devel] [PATCH v7 19/35] dimm: abstract dimm device from pc-dimm

[Xiao Guangrong <guangrong.xiao@linux.intel.com>]

A base device, dimm, is abstracted from pc-dimm, so that we can
build nvdimm device based on dimm in the later patch

Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
---
 default-configs/i386-softmmu.mak   |  1 +
 default-configs/ppc64-softmmu.mak  |  1 +
 default-configs/x86_64-softmmu.mak |  1 +
 hw/mem/Makefile.objs               |  3 ++-
 hw/mem/dimm.c                      | 11 ++-------
 hw/mem/pc-dimm.c                   | 46 ++++++++++++++++++++++++++++++++++++++
 include/hw/mem/dimm.h              |  4 ++--
 include/hw/mem/pc-dimm.h           |  7 ++++++
 8 files changed, 62 insertions(+), 12 deletions(-)
 create mode 100644 hw/mem/pc-dimm.c
 create mode 100644 include/hw/mem/pc-dimm.h

diff --git a/default-configs/i386-softmmu.mak b/default-configs/i386-softmmu.mak
index 43c96d1..3ece8bb 100644
--- a/default-configs/i386-softmmu.mak
+++ b/default-configs/i386-softmmu.mak
@@ -18,6 +18,7 @@ CONFIG_FDC=y
 CONFIG_ACPI=y
 CONFIG_ACPI_X86=y
 CONFIG_ACPI_X86_ICH=y
+CONFIG_DIMM=y
 CONFIG_ACPI_MEMORY_HOTPLUG=y
 CONFIG_ACPI_CPU_HOTPLUG=y
 CONFIG_APM=y
diff --git a/default-configs/ppc64-softmmu.mak b/default-configs/ppc64-softmmu.mak
index bb71b23..482b8a1 100644
--- a/default-configs/ppc64-softmmu.mak
+++ b/default-configs/ppc64-softmmu.mak
@@ -54,3 +54,4 @@ CONFIG_XICS_KVM=$(and $(CONFIG_PSERIES),$(CONFIG_KVM))
 CONFIG_MC146818RTC=y
 CONFIG_ISA_TESTDEV=y
 CONFIG_MEM_HOTPLUG=y
+CONFIG_DIMM=y
diff --git a/default-configs/x86_64-softmmu.mak b/default-configs/x86_64-softmmu.mak
index dfb8095..92ea7c1 100644
--- a/default-configs/x86_64-softmmu.mak
+++ b/default-configs/x86_64-softmmu.mak
@@ -18,6 +18,7 @@ CONFIG_FDC=y
 CONFIG_ACPI=y
 CONFIG_ACPI_X86=y
 CONFIG_ACPI_X86_ICH=y
+CONFIG_DIMM=y
 CONFIG_ACPI_MEMORY_HOTPLUG=y
 CONFIG_ACPI_CPU_HOTPLUG=y
 CONFIG_APM=y
diff --git a/hw/mem/Makefile.objs b/hw/mem/Makefile.objs
index 7563ef5..cebb4b1 100644
--- a/hw/mem/Makefile.objs
+++ b/hw/mem/Makefile.objs
@@ -1 +1,2 @@
-common-obj-$(CONFIG_MEM_HOTPLUG) += dimm.o
+common-obj-$(CONFIG_DIMM) += dimm.o
+common-obj-$(CONFIG_MEM_HOTPLUG) += pc-dimm.o
diff --git a/hw/mem/dimm.c b/hw/mem/dimm.c
index 9f55cee..4a63409 100644
--- a/hw/mem/dimm.c
+++ b/hw/mem/dimm.c
@@ -1,5 +1,5 @@
 /*
- * Dimm device for Memory Hotplug
+ * Dimm device abstraction
  *
  * Copyright ProfitBricks GmbH 2012
  * Copyright (C) 2014 Red Hat Inc
@@ -429,21 +429,13 @@ static void dimm_realize(DeviceState *dev, Error **errp)
     }
 }
 
-static MemoryRegion *dimm_get_memory_region(DIMMDevice *dimm)
-{
-    return host_memory_backend_get_memory(dimm->hostmem, &error_abort);
-}
-
 static void dimm_class_init(ObjectClass *oc, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
-    DIMMDeviceClass *ddc = DIMM_CLASS(oc);
 
     dc->realize = dimm_realize;
     dc->props = dimm_properties;
     dc->desc = "DIMM memory module";
-
-    ddc->get_memory_region = dimm_get_memory_region;
 }
 
 static TypeInfo dimm_info = {
@@ -453,6 +445,7 @@ static TypeInfo dimm_info = {
     .instance_init = dimm_init,
     .class_init    = dimm_class_init,
     .class_size    = sizeof(DIMMDeviceClass),
+    .abstract      = true,
 };
 
 static void dimm_register_types(void)
diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
new file mode 100644
index 0000000..38323e9
--- /dev/null
+++ b/hw/mem/pc-dimm.c
@@ -0,0 +1,46 @@
+/*
+ * Dimm device for Memory Hotplug
+ *
+ * Copyright ProfitBricks GmbH 2012
+ * Copyright (C) 2014 Red Hat Inc
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+
+#include "hw/mem/pc-dimm.h"
+
+static MemoryRegion *pc_dimm_get_memory_region(DIMMDevice *dimm)
+{
+    return host_memory_backend_get_memory(dimm->hostmem, &error_abort);
+}
+
+static void pc_dimm_class_init(ObjectClass *oc, void *data)
+{
+    DIMMDeviceClass *ddc = DIMM_CLASS(oc);
+
+    ddc->get_memory_region = pc_dimm_get_memory_region;
+}
+
+static TypeInfo pc_dimm_info = {
+    .name          = TYPE_PC_DIMM,
+    .parent        = TYPE_DIMM,
+    .class_init    = pc_dimm_class_init,
+};
+
+static void pc_dimm_register_types(void)
+{
+    type_register_static(&pc_dimm_info);
+}
+
+type_init(pc_dimm_register_types)
diff --git a/include/hw/mem/dimm.h b/include/hw/mem/dimm.h
index ece8786..50f768a 100644
--- a/include/hw/mem/dimm.h
+++ b/include/hw/mem/dimm.h
@@ -1,5 +1,5 @@
 /*
- * PC DIMM device
+ * Dimm device abstraction
  *
  * Copyright ProfitBricks GmbH 2012
  * Copyright (C) 2013-2014 Red Hat Inc
@@ -20,7 +20,7 @@
 #include "sysemu/hostmem.h"
 #include "hw/qdev.h"
 
-#define TYPE_DIMM "pc-dimm"
+#define TYPE_DIMM "dimm"
 #define DIMM(obj) \
     OBJECT_CHECK(DIMMDevice, (obj), TYPE_DIMM)
 #define DIMM_CLASS(oc) \
diff --git a/include/hw/mem/pc-dimm.h b/include/hw/mem/pc-dimm.h
new file mode 100644
index 0000000..50818c2
--- /dev/null
+++ b/include/hw/mem/pc-dimm.h
@@ -0,0 +1,7 @@
+#ifndef QEMU_PC_DIMM_H
+#define QEMU_PC_DIMM_H
+
+#include "hw/mem/dimm.h"
+
+#define TYPE_PC_DIMM "pc-dimm"
+#endif
-- 
1.8.3.1