Include hw/qdev-properties.h less

[qemu.git] / hw / mem / nvdimm.c

diff --git a/hw/mem/nvdimm.c b/hw/mem/nvdimm.c
index 4fd397f015579efa533646fc5c1de567fe976a76..6fefd65092ac7ab0d9f442cb5e662051f068a1b8 100644 (file)
--- a/hw/mem/nvdimm.c
+++ b/hw/mem/nvdimm.c
@@ -22,20 +22,199 @@
  * License along with this library; if not, see <http://www.gnu.org/licenses/>
  */
 
  * License along with this library; if not, see <http://www.gnu.org/licenses/>
  */
 

+#include "qemu/osdep.h"
+#include "qemu/module.h"
+#include "qemu/pmem.h"
+#include "qapi/error.h"
+#include "qapi/visitor.h"

 #include "hw/mem/nvdimm.h"
 #include "hw/mem/nvdimm.h"

+#include "hw/qdev-properties.h"
+#include "hw/mem/memory-device.h"
+
+static void nvdimm_get_label_size(Object *obj, Visitor *v, const char *name,
+                                  void *opaque, Error **errp)
+{
+    NVDIMMDevice *nvdimm = NVDIMM(obj);
+    uint64_t value = nvdimm->label_size;
+
+    visit_type_size(v, name, &value, errp);
+}
+
+static void nvdimm_set_label_size(Object *obj, Visitor *v, const char *name,
+                                  void *opaque, Error **errp)
+{
+    NVDIMMDevice *nvdimm = NVDIMM(obj);
+    Error *local_err = NULL;
+    uint64_t value;
+
+    if (nvdimm->nvdimm_mr) {
+        error_setg(&local_err, "cannot change property value");
+        goto out;
+    }
+
+    visit_type_size(v, name, &value, &local_err);
+    if (local_err) {
+        goto out;
+    }
+    if (value < MIN_NAMESPACE_LABEL_SIZE) {
+        error_setg(&local_err, "Property '%s.%s' (0x%" PRIx64 ") is required"
+                   " at least 0x%lx", object_get_typename(obj),
+                   name, value, MIN_NAMESPACE_LABEL_SIZE);
+        goto out;
+    }
+
+    nvdimm->label_size = value;
+out:
+    error_propagate(errp, local_err);
+}
+
+static void nvdimm_init(Object *obj)
+{
+    object_property_add(obj, NVDIMM_LABEL_SIZE_PROP, "int",
+                        nvdimm_get_label_size, nvdimm_set_label_size, NULL,
+                        NULL, NULL);
+}
+
+static void nvdimm_finalize(Object *obj)
+{
+    NVDIMMDevice *nvdimm = NVDIMM(obj);
+
+    g_free(nvdimm->nvdimm_mr);
+}
+
+static void nvdimm_prepare_memory_region(NVDIMMDevice *nvdimm, Error **errp)
+{
+    PCDIMMDevice *dimm = PC_DIMM(nvdimm);
+    uint64_t align, pmem_size, size;
+    MemoryRegion *mr;
+
+    g_assert(!nvdimm->nvdimm_mr);
+
+    if (!dimm->hostmem) {
+        error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property must be set");
+        return;
+    }
+
+    mr = host_memory_backend_get_memory(dimm->hostmem);
+    align = memory_region_get_alignment(mr);
+    size = memory_region_size(mr);
+
+    pmem_size = size - nvdimm->label_size;
+    nvdimm->label_data = memory_region_get_ram_ptr(mr) + pmem_size;
+    pmem_size = QEMU_ALIGN_DOWN(pmem_size, align);
+
+    if (size <= nvdimm->label_size || !pmem_size) {
+        HostMemoryBackend *hostmem = dimm->hostmem;
+        char *path = object_get_canonical_path_component(OBJECT(hostmem));
+
+        error_setg(errp, "the size of memdev %s (0x%" PRIx64 ") is too "
+                   "small to contain nvdimm label (0x%" PRIx64 ") and "
+                   "aligned PMEM (0x%" PRIx64 ")",
+                   path, memory_region_size(mr), nvdimm->label_size, align);
+        g_free(path);
+        return;
+    }
+
+    nvdimm->nvdimm_mr = g_new(MemoryRegion, 1);
+    memory_region_init_alias(nvdimm->nvdimm_mr, OBJECT(dimm),
+                             "nvdimm-memory", mr, 0, pmem_size);
+    memory_region_set_nonvolatile(nvdimm->nvdimm_mr, true);
+    nvdimm->nvdimm_mr->align = align;
+}
+
+static MemoryRegion *nvdimm_md_get_memory_region(MemoryDeviceState *md,
+                                                 Error **errp)
+{
+    NVDIMMDevice *nvdimm = NVDIMM(md);
+    Error *local_err = NULL;
+
+    if (!nvdimm->nvdimm_mr) {
+        nvdimm_prepare_memory_region(nvdimm, &local_err);
+        if (local_err) {
+            error_propagate(errp, local_err);
+            return NULL;
+        }
+    }
+    return nvdimm->nvdimm_mr;
+}
+
+static void nvdimm_realize(PCDIMMDevice *dimm, Error **errp)
+{
+    NVDIMMDevice *nvdimm = NVDIMM(dimm);
+
+    if (!nvdimm->nvdimm_mr) {
+        nvdimm_prepare_memory_region(nvdimm, errp);
+    }
+}
+
+/*
+ * the caller should check the input parameters before calling
+ * label read/write functions.
+ */
+static void nvdimm_validate_rw_label_data(NVDIMMDevice *nvdimm, uint64_t size,
+                                        uint64_t offset)
+{
+    assert((nvdimm->label_size >= size + offset) && (offset + size > offset));
+}
+
+static void nvdimm_read_label_data(NVDIMMDevice *nvdimm, void *buf,
+                                   uint64_t size, uint64_t offset)
+{
+    nvdimm_validate_rw_label_data(nvdimm, size, offset);
+
+    memcpy(buf, nvdimm->label_data + offset, size);
+}
+
+static void nvdimm_write_label_data(NVDIMMDevice *nvdimm, const void *buf,
+                                    uint64_t size, uint64_t offset)
+{
+    MemoryRegion *mr;
+    PCDIMMDevice *dimm = PC_DIMM(nvdimm);
+    bool is_pmem = object_property_get_bool(OBJECT(dimm->hostmem),
+                                            "pmem", NULL);
+    uint64_t backend_offset;
+
+    nvdimm_validate_rw_label_data(nvdimm, size, offset);
+
+    if (!is_pmem) {
+        memcpy(nvdimm->label_data + offset, buf, size);
+    } else {
+        pmem_memcpy_persist(nvdimm->label_data + offset, buf, size);
+    }
+
+    mr = host_memory_backend_get_memory(dimm->hostmem);
+    backend_offset = memory_region_size(mr) - nvdimm->label_size + offset;
+    memory_region_set_dirty(mr, backend_offset, size);
+}
+
+static Property nvdimm_properties[] = {
+    DEFINE_PROP_BOOL(NVDIMM_UNARMED_PROP, NVDIMMDevice, unarmed, false),
+    DEFINE_PROP_END_OF_LIST(),
+};

 
 static void nvdimm_class_init(ObjectClass *oc, void *data)
 {
 
 static void nvdimm_class_init(ObjectClass *oc, void *data)
 {

+    PCDIMMDeviceClass *ddc = PC_DIMM_CLASS(oc);
+    MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(oc);
+    NVDIMMClass *nvc = NVDIMM_CLASS(oc);

     DeviceClass *dc = DEVICE_CLASS(oc);
 
     DeviceClass *dc = DEVICE_CLASS(oc);
 

-    /* nvdimm hotplug has not been supported yet. */
-    dc->hotpluggable = false;
+    ddc->realize = nvdimm_realize;
+    mdc->get_memory_region = nvdimm_md_get_memory_region;
+    dc->props = nvdimm_properties;
+
+    nvc->read_label_data = nvdimm_read_label_data;
+    nvc->write_label_data = nvdimm_write_label_data;

 }
 
 static TypeInfo nvdimm_info = {
     .name          = TYPE_NVDIMM,
     .parent        = TYPE_PC_DIMM,
 }
 
 static TypeInfo nvdimm_info = {
     .name          = TYPE_NVDIMM,
     .parent        = TYPE_PC_DIMM,

+    .class_size    = sizeof(NVDIMMClass),

     .class_init    = nvdimm_class_init,
     .class_init    = nvdimm_class_init,

+    .instance_size = sizeof(NVDIMMDevice),
+    .instance_init = nvdimm_init,
+    .instance_finalize = nvdimm_finalize,

 };
 
 static void nvdimm_register_types(void)
 };
 
 static void nvdimm_register_types(void)