xref: /openbmc/qemu/include/hw/mem/pc-dimm.h (revision d73abd6d)
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     ram_addr_t 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
98