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21#include "qemu/osdep.h"
22#include "hw/mem/pc-dimm.h"
23#include "hw/mem/nvdimm.h"
24#include "hw/mem/memory-device.h"
25#include "qapi/error.h"
26#include "qapi/visitor.h"
27#include "sysemu/numa.h"
28#include "trace.h"
29
30static int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp);
31
32void pc_dimm_pre_plug(PCDIMMDevice *dimm, MachineState *machine,
33 const uint64_t *legacy_align, Error **errp)
34{
35 Error *local_err = NULL;
36 int slot;
37
38 slot = object_property_get_int(OBJECT(dimm), PC_DIMM_SLOT_PROP,
39 &error_abort);
40 slot = pc_dimm_get_free_slot(slot == PC_DIMM_UNASSIGNED_SLOT ? NULL : &slot,
41 machine->ram_slots, &local_err);
42 if (local_err) {
43 goto out;
44 }
45 object_property_set_int(OBJECT(dimm), slot, PC_DIMM_SLOT_PROP,
46 &error_abort);
47 trace_mhp_pc_dimm_assigned_slot(slot);
48
49 memory_device_pre_plug(MEMORY_DEVICE(dimm), machine, legacy_align,
50 &local_err);
51out:
52 error_propagate(errp, local_err);
53}
54
55void pc_dimm_plug(PCDIMMDevice *dimm, MachineState *machine, Error **errp)
56{
57 PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
58 MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm,
59 &error_abort);
60
61 memory_device_plug(MEMORY_DEVICE(dimm), machine);
62 vmstate_register_ram(vmstate_mr, DEVICE(dimm));
63}
64
65void pc_dimm_unplug(PCDIMMDevice *dimm, MachineState *machine)
66{
67 PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
68 MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm,
69 &error_abort);
70
71 memory_device_unplug(MEMORY_DEVICE(dimm), machine);
72 vmstate_unregister_ram(vmstate_mr, DEVICE(dimm));
73}
74
75static int pc_dimm_slot2bitmap(Object *obj, void *opaque)
76{
77 unsigned long *bitmap = opaque;
78
79 if (object_dynamic_cast(obj, TYPE_PC_DIMM)) {
80 DeviceState *dev = DEVICE(obj);
81 if (dev->realized) {
82 PCDIMMDevice *d = PC_DIMM(obj);
83 set_bit(d->slot, bitmap);
84 }
85 }
86
87 object_child_foreach(obj, pc_dimm_slot2bitmap, opaque);
88 return 0;
89}
90
91static int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp)
92{
93 unsigned long *bitmap;
94 int slot = 0;
95
96 if (max_slots <= 0) {
97 error_setg(errp, "no slots where allocated, please specify "
98 "the 'slots' option");
99 return slot;
100 }
101
102 bitmap = bitmap_new(max_slots);
103 object_child_foreach(qdev_get_machine(), pc_dimm_slot2bitmap, bitmap);
104
105
106 if (hint) {
107 if (*hint >= max_slots) {
108 error_setg(errp, "invalid slot# %d, should be less than %d",
109 *hint, max_slots);
110 } else if (!test_bit(*hint, bitmap)) {
111 slot = *hint;
112 } else {
113 error_setg(errp, "slot %d is busy", *hint);
114 }
115 goto out;
116 }
117
118
119 slot = find_first_zero_bit(bitmap, max_slots);
120 if (slot == max_slots) {
121 error_setg(errp, "no free slots available");
122 }
123out:
124 g_free(bitmap);
125 return slot;
126}
127
128static Property pc_dimm_properties[] = {
129 DEFINE_PROP_UINT64(PC_DIMM_ADDR_PROP, PCDIMMDevice, addr, 0),
130 DEFINE_PROP_UINT32(PC_DIMM_NODE_PROP, PCDIMMDevice, node, 0),
131 DEFINE_PROP_INT32(PC_DIMM_SLOT_PROP, PCDIMMDevice, slot,
132 PC_DIMM_UNASSIGNED_SLOT),
133 DEFINE_PROP_LINK(PC_DIMM_MEMDEV_PROP, PCDIMMDevice, hostmem,
134 TYPE_MEMORY_BACKEND, HostMemoryBackend *),
135 DEFINE_PROP_END_OF_LIST(),
136};
137
138static void pc_dimm_get_size(Object *obj, Visitor *v, const char *name,
139 void *opaque, Error **errp)
140{
141 Error *local_err = NULL;
142 uint64_t value;
143
144 value = memory_device_get_region_size(MEMORY_DEVICE(obj), &local_err);
145 if (local_err) {
146 error_propagate(errp, local_err);
147 return;
148 }
149
150 visit_type_uint64(v, name, &value, errp);
151}
152
153static void pc_dimm_init(Object *obj)
154{
155 object_property_add(obj, PC_DIMM_SIZE_PROP, "uint64", pc_dimm_get_size,
156 NULL, NULL, NULL, &error_abort);
157}
158
159static void pc_dimm_realize(DeviceState *dev, Error **errp)
160{
161 PCDIMMDevice *dimm = PC_DIMM(dev);
162 PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
163
164 if (!dimm->hostmem) {
165 error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property is not set");
166 return;
167 } else if (host_memory_backend_is_mapped(dimm->hostmem)) {
168 char *path = object_get_canonical_path_component(OBJECT(dimm->hostmem));
169 error_setg(errp, "can't use already busy memdev: %s", path);
170 g_free(path);
171 return;
172 }
173 if (((nb_numa_nodes > 0) && (dimm->node >= nb_numa_nodes)) ||
174 (!nb_numa_nodes && dimm->node)) {
175 error_setg(errp, "'DIMM property " PC_DIMM_NODE_PROP " has value %"
176 PRIu32 "' which exceeds the number of numa nodes: %d",
177 dimm->node, nb_numa_nodes ? nb_numa_nodes : 1);
178 return;
179 }
180
181 if (ddc->realize) {
182 ddc->realize(dimm, errp);
183 }
184
185 host_memory_backend_set_mapped(dimm->hostmem, true);
186}
187
188static void pc_dimm_unrealize(DeviceState *dev, Error **errp)
189{
190 PCDIMMDevice *dimm = PC_DIMM(dev);
191
192 host_memory_backend_set_mapped(dimm->hostmem, false);
193}
194
195static MemoryRegion *pc_dimm_get_memory_region(PCDIMMDevice *dimm, Error **errp)
196{
197 if (!dimm->hostmem) {
198 error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property must be set");
199 return NULL;
200 }
201
202 return host_memory_backend_get_memory(dimm->hostmem);
203}
204
205static uint64_t pc_dimm_md_get_addr(const MemoryDeviceState *md)
206{
207 const PCDIMMDevice *dimm = PC_DIMM(md);
208
209 return dimm->addr;
210}
211
212static void pc_dimm_md_set_addr(MemoryDeviceState *md, uint64_t addr,
213 Error **errp)
214{
215 object_property_set_uint(OBJECT(md), addr, PC_DIMM_ADDR_PROP, errp);
216}
217
218static MemoryRegion *pc_dimm_md_get_memory_region(MemoryDeviceState *md,
219 Error **errp)
220{
221 return pc_dimm_get_memory_region(PC_DIMM(md), errp);
222}
223
224static void pc_dimm_md_fill_device_info(const MemoryDeviceState *md,
225 MemoryDeviceInfo *info)
226{
227 PCDIMMDeviceInfo *di = g_new0(PCDIMMDeviceInfo, 1);
228 const DeviceClass *dc = DEVICE_GET_CLASS(md);
229 const PCDIMMDevice *dimm = PC_DIMM(md);
230 const DeviceState *dev = DEVICE(md);
231
232 if (dev->id) {
233 di->has_id = true;
234 di->id = g_strdup(dev->id);
235 }
236 di->hotplugged = dev->hotplugged;
237 di->hotpluggable = dc->hotpluggable;
238 di->addr = dimm->addr;
239 di->slot = dimm->slot;
240 di->node = dimm->node;
241 di->size = object_property_get_uint(OBJECT(dimm), PC_DIMM_SIZE_PROP,
242 NULL);
243 di->memdev = object_get_canonical_path(OBJECT(dimm->hostmem));
244
245 if (object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM)) {
246 info->u.nvdimm.data = di;
247 info->type = MEMORY_DEVICE_INFO_KIND_NVDIMM;
248 } else {
249 info->u.dimm.data = di;
250 info->type = MEMORY_DEVICE_INFO_KIND_DIMM;
251 }
252}
253
254static void pc_dimm_class_init(ObjectClass *oc, void *data)
255{
256 DeviceClass *dc = DEVICE_CLASS(oc);
257 PCDIMMDeviceClass *ddc = PC_DIMM_CLASS(oc);
258 MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(oc);
259
260 dc->realize = pc_dimm_realize;
261 dc->unrealize = pc_dimm_unrealize;
262 dc->props = pc_dimm_properties;
263 dc->desc = "DIMM memory module";
264
265 ddc->get_vmstate_memory_region = pc_dimm_get_memory_region;
266
267 mdc->get_addr = pc_dimm_md_get_addr;
268 mdc->set_addr = pc_dimm_md_set_addr;
269
270 mdc->get_plugged_size = memory_device_get_region_size;
271 mdc->get_memory_region = pc_dimm_md_get_memory_region;
272 mdc->fill_device_info = pc_dimm_md_fill_device_info;
273}
274
275static TypeInfo pc_dimm_info = {
276 .name = TYPE_PC_DIMM,
277 .parent = TYPE_DEVICE,
278 .instance_size = sizeof(PCDIMMDevice),
279 .instance_init = pc_dimm_init,
280 .class_init = pc_dimm_class_init,
281 .class_size = sizeof(PCDIMMDeviceClass),
282 .interfaces = (InterfaceInfo[]) {
283 { TYPE_MEMORY_DEVICE },
284 { }
285 },
286};
287
288static void pc_dimm_register_types(void)
289{
290 type_register_static(&pc_dimm_info);
291}
292
293type_init(pc_dimm_register_types)
294
