include/hw/mem/pc-dimm.h

   1 /*
   2  * PC DIMM device
   3  *
   4  * Copyright ProfitBricks GmbH 2012
   5  * Copyright (C) 2013-2014 Red Hat Inc
   6  *
   7  * Authors:
   8  *  Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com>
   9  *  Igor Mammedov <imammedo@redhat.com>
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  12  * See the COPYING file in the top-level directory.
  13  *
  14  */
  15
  16 #ifndef QEMU_PC_DIMM_H
  17 #define QEMU_PC_DIMM_H
  18
  19 #include "exec/memory.h"
  20 #include "sysemu/hostmem.h"
  21 #include "hw/qdev.h"
  22
  23 #define DEFAULT_PC_DIMMSIZE (1024*1024*1024)
  24
  25 #define TYPE_PC_DIMM "pc-dimm"
  26 #define PC_DIMM(obj) \
  27     OBJECT_CHECK(PCDIMMDevice, (obj), TYPE_PC_DIMM)
  28 #define PC_DIMM_CLASS(oc) \
  29     OBJECT_CLASS_CHECK(PCDIMMDeviceClass, (oc), TYPE_PC_DIMM)
  30 #define PC_DIMM_GET_CLASS(obj) \
  31     OBJECT_GET_CLASS(PCDIMMDeviceClass, (obj), TYPE_PC_DIMM)
  32
  33 #define PC_DIMM_ADDR_PROP "addr"
  34 #define PC_DIMM_SLOT_PROP "slot"
  35 #define PC_DIMM_NODE_PROP "node"
  36 #define PC_DIMM_SIZE_PROP "size"
  37 #define PC_DIMM_MEMDEV_PROP "memdev"
  38
  39 #define PC_DIMM_UNASSIGNED_SLOT -1
  40
  41 /**
  42  * PCDIMMDevice:
  43  * @addr: starting guest physical address, where @PCDIMMDevice is mapped.
  44  *         Default value: 0, means that address is auto-allocated.
  45  * @node: numa node to which @PCDIMMDevice is attached.
  46  * @slot: slot number into which @PCDIMMDevice is plugged in.
  47  *        Default value: -1, means that slot is auto-allocated.
  48  * @hostmem: host memory backend providing memory for @PCDIMMDevice
  49  */
  50 typedef struct PCDIMMDevice {
  51     /* private */
  52     DeviceState parent_obj;
  53
  54     /* public */
  55     uint64_t addr;
  56     uint32_t node;
  57     int32_t slot;
  58     HostMemoryBackend *hostmem;
  59 } PCDIMMDevice;
  60
  61 /**
  62  * PCDIMMDeviceClass:
  63  * @get_memory_region: returns #MemoryRegion associated with @dimm
  64  */
  65 typedef struct PCDIMMDeviceClass {
  66     /* private */
  67     DeviceClass parent_class;
  68
  69     /* public */
  70     MemoryRegion *(*get_memory_region)(PCDIMMDevice *dimm);
  71 } PCDIMMDeviceClass;
  72
  73 /**
  74  * MemoryHotplugState:
  75  * @base: address in guest RAM address space where hotplug memory
  76  * address space begins.
  77  * @mr: hotplug memory address space container
  78  */
  79 typedef struct MemoryHotplugState {
  80     hwaddr base;
  81     MemoryRegion mr;
  82 } MemoryHotplugState;
  83
  84 uint64_t pc_dimm_get_free_addr(uint64_t address_space_start,
  85                                uint64_t address_space_size,
  86                                uint64_t *hint, uint64_t align, uint64_t size,
  87                                Error **errp);
  88
  89 int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp);
  90
  91 int qmp_pc_dimm_device_list(Object *obj, void *opaque);
  92 uint64_t pc_existing_dimms_capacity(Error **errp);
  93 void pc_dimm_memory_plug(DeviceState *dev, MemoryHotplugState *hpms,
  94                          MemoryRegion *mr, uint64_t align, Error **errp);
  95 void pc_dimm_memory_unplug(DeviceState *dev, MemoryHotplugState *hpms,
  96                            MemoryRegion *mr);
  97 #endif