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10b7e74b VL |
1 | /* |
2 | * Dimm device for Memory Hotplug | |
3 | * | |
4 | * Copyright ProfitBricks GmbH 2012 | |
5 | * Copyright (C) 2014 Red Hat Inc | |
6 | * | |
7 | * This library is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2 of the License, or (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with this library; if not, see <http://www.gnu.org/licenses/> | |
19 | */ | |
20 | ||
0430891c | 21 | #include "qemu/osdep.h" |
10b7e74b | 22 | #include "hw/mem/pc-dimm.h" |
6388e18d | 23 | #include "hw/mem/nvdimm.h" |
2cc0e2e8 | 24 | #include "hw/mem/memory-device.h" |
da34e65c | 25 | #include "qapi/error.h" |
10b7e74b | 26 | #include "qapi/visitor.h" |
0b8fa32f | 27 | #include "qemu/module.h" |
e35704ba | 28 | #include "sysemu/numa.h" |
43bbb49e | 29 | #include "trace.h" |
9967c949 | 30 | |
9995c759 DH |
31 | static int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp); |
32 | ||
fd3416f5 | 33 | void pc_dimm_pre_plug(PCDIMMDevice *dimm, MachineState *machine, |
b0e62443 | 34 | const uint64_t *legacy_align, Error **errp) |
8f1ffe5b DH |
35 | { |
36 | Error *local_err = NULL; | |
37 | int slot; | |
38 | ||
fd3416f5 | 39 | slot = object_property_get_int(OBJECT(dimm), PC_DIMM_SLOT_PROP, |
8f1ffe5b DH |
40 | &error_abort); |
41 | slot = pc_dimm_get_free_slot(slot == PC_DIMM_UNASSIGNED_SLOT ? NULL : &slot, | |
42 | machine->ram_slots, &local_err); | |
43 | if (local_err) { | |
44 | goto out; | |
45 | } | |
fd3416f5 DH |
46 | object_property_set_int(OBJECT(dimm), slot, PC_DIMM_SLOT_PROP, |
47 | &error_abort); | |
8f1ffe5b | 48 | trace_mhp_pc_dimm_assigned_slot(slot); |
b0e62443 | 49 | |
6ef2c0f2 DH |
50 | memory_device_pre_plug(MEMORY_DEVICE(dimm), machine, legacy_align, |
51 | &local_err); | |
8f1ffe5b DH |
52 | out: |
53 | error_propagate(errp, local_err); | |
54 | } | |
55 | ||
fd3416f5 | 56 | void pc_dimm_plug(PCDIMMDevice *dimm, MachineState *machine, Error **errp) |
43bbb49e | 57 | { |
8df1426e | 58 | PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm); |
a57d1911 DH |
59 | MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm, |
60 | &error_abort); | |
43bbb49e | 61 | |
55d67a04 | 62 | memory_device_plug(MEMORY_DEVICE(dimm), machine); |
fd3416f5 | 63 | vmstate_register_ram(vmstate_mr, DEVICE(dimm)); |
43bbb49e BR |
64 | } |
65 | ||
fd3416f5 | 66 | void pc_dimm_unplug(PCDIMMDevice *dimm, MachineState *machine) |
43bbb49e | 67 | { |
8df1426e | 68 | PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm); |
a57d1911 DH |
69 | MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm, |
70 | &error_abort); | |
fa9ea81d | 71 | |
8288590d | 72 | memory_device_unplug(MEMORY_DEVICE(dimm), machine); |
fd3416f5 | 73 | vmstate_unregister_ram(vmstate_mr, DEVICE(dimm)); |
43bbb49e BR |
74 | } |
75 | ||
0cd03d89 IM |
76 | static int pc_dimm_slot2bitmap(Object *obj, void *opaque) |
77 | { | |
78 | unsigned long *bitmap = opaque; | |
79 | ||
80 | if (object_dynamic_cast(obj, TYPE_PC_DIMM)) { | |
81 | DeviceState *dev = DEVICE(obj); | |
82 | if (dev->realized) { /* count only realized DIMMs */ | |
83 | PCDIMMDevice *d = PC_DIMM(obj); | |
84 | set_bit(d->slot, bitmap); | |
85 | } | |
86 | } | |
87 | ||
88 | object_child_foreach(obj, pc_dimm_slot2bitmap, opaque); | |
89 | return 0; | |
90 | } | |
91 | ||
9995c759 | 92 | static int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp) |
0cd03d89 | 93 | { |
3ff333ef | 94 | unsigned long *bitmap; |
0cd03d89 IM |
95 | int slot = 0; |
96 | ||
3ff333ef DH |
97 | if (max_slots <= 0) { |
98 | error_setg(errp, "no slots where allocated, please specify " | |
99 | "the 'slots' option"); | |
100 | return slot; | |
101 | } | |
102 | ||
103 | bitmap = bitmap_new(max_slots); | |
0cd03d89 IM |
104 | object_child_foreach(qdev_get_machine(), pc_dimm_slot2bitmap, bitmap); |
105 | ||
106 | /* check if requested slot is not occupied */ | |
107 | if (hint) { | |
108 | if (*hint >= max_slots) { | |
109 | error_setg(errp, "invalid slot# %d, should be less than %d", | |
110 | *hint, max_slots); | |
111 | } else if (!test_bit(*hint, bitmap)) { | |
112 | slot = *hint; | |
113 | } else { | |
114 | error_setg(errp, "slot %d is busy", *hint); | |
115 | } | |
116 | goto out; | |
117 | } | |
118 | ||
119 | /* search for free slot */ | |
120 | slot = find_first_zero_bit(bitmap, max_slots); | |
121 | if (slot == max_slots) { | |
122 | error_setg(errp, "no free slots available"); | |
123 | } | |
124 | out: | |
125 | g_free(bitmap); | |
126 | return slot; | |
127 | } | |
128 | ||
10b7e74b VL |
129 | static Property pc_dimm_properties[] = { |
130 | DEFINE_PROP_UINT64(PC_DIMM_ADDR_PROP, PCDIMMDevice, addr, 0), | |
131 | DEFINE_PROP_UINT32(PC_DIMM_NODE_PROP, PCDIMMDevice, node, 0), | |
132 | DEFINE_PROP_INT32(PC_DIMM_SLOT_PROP, PCDIMMDevice, slot, | |
133 | PC_DIMM_UNASSIGNED_SLOT), | |
2de7e268 FZ |
134 | DEFINE_PROP_LINK(PC_DIMM_MEMDEV_PROP, PCDIMMDevice, hostmem, |
135 | TYPE_MEMORY_BACKEND, HostMemoryBackend *), | |
10b7e74b VL |
136 | DEFINE_PROP_END_OF_LIST(), |
137 | }; | |
138 | ||
d7bce999 EB |
139 | static void pc_dimm_get_size(Object *obj, Visitor *v, const char *name, |
140 | void *opaque, Error **errp) | |
10b7e74b | 141 | { |
946d6154 | 142 | Error *local_err = NULL; |
b053ef61 | 143 | uint64_t value; |
10b7e74b | 144 | |
946d6154 DH |
145 | value = memory_device_get_region_size(MEMORY_DEVICE(obj), &local_err); |
146 | if (local_err) { | |
147 | error_propagate(errp, local_err); | |
04790978 TH |
148 | return; |
149 | } | |
10b7e74b | 150 | |
b053ef61 | 151 | visit_type_uint64(v, name, &value, errp); |
10b7e74b VL |
152 | } |
153 | ||
154 | static void pc_dimm_init(Object *obj) | |
155 | { | |
b053ef61 | 156 | object_property_add(obj, PC_DIMM_SIZE_PROP, "uint64", pc_dimm_get_size, |
10b7e74b | 157 | NULL, NULL, NULL, &error_abort); |
10b7e74b VL |
158 | } |
159 | ||
160 | static void pc_dimm_realize(DeviceState *dev, Error **errp) | |
161 | { | |
162 | PCDIMMDevice *dimm = PC_DIMM(dev); | |
9f318f8f | 163 | PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm); |
10b7e74b VL |
164 | |
165 | if (!dimm->hostmem) { | |
166 | error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property is not set"); | |
167 | return; | |
2de7e268 FZ |
168 | } else if (host_memory_backend_is_mapped(dimm->hostmem)) { |
169 | char *path = object_get_canonical_path_component(OBJECT(dimm->hostmem)); | |
170 | error_setg(errp, "can't use already busy memdev: %s", path); | |
171 | g_free(path); | |
172 | return; | |
10b7e74b | 173 | } |
32532f21 BR |
174 | if (((nb_numa_nodes > 0) && (dimm->node >= nb_numa_nodes)) || |
175 | (!nb_numa_nodes && dimm->node)) { | |
988eba0f MT |
176 | error_setg(errp, "'DIMM property " PC_DIMM_NODE_PROP " has value %" |
177 | PRIu32 "' which exceeds the number of numa nodes: %d", | |
32532f21 | 178 | dimm->node, nb_numa_nodes ? nb_numa_nodes : 1); |
cfe0ffd0 HT |
179 | return; |
180 | } | |
9f318f8f XG |
181 | |
182 | if (ddc->realize) { | |
183 | ddc->realize(dimm, errp); | |
184 | } | |
2aece63c XG |
185 | |
186 | host_memory_backend_set_mapped(dimm->hostmem, true); | |
187 | } | |
188 | ||
189 | static void pc_dimm_unrealize(DeviceState *dev, Error **errp) | |
190 | { | |
191 | PCDIMMDevice *dimm = PC_DIMM(dev); | |
192 | ||
193 | host_memory_backend_set_mapped(dimm->hostmem, false); | |
10b7e74b VL |
194 | } |
195 | ||
04790978 | 196 | static MemoryRegion *pc_dimm_get_memory_region(PCDIMMDevice *dimm, Error **errp) |
10b7e74b | 197 | { |
04790978 TH |
198 | if (!dimm->hostmem) { |
199 | error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property must be set"); | |
200 | return NULL; | |
201 | } | |
202 | ||
7943e97b | 203 | return host_memory_backend_get_memory(dimm->hostmem); |
10b7e74b VL |
204 | } |
205 | ||
2cc0e2e8 DH |
206 | static uint64_t pc_dimm_md_get_addr(const MemoryDeviceState *md) |
207 | { | |
f60f5e80 | 208 | return object_property_get_uint(OBJECT(md), PC_DIMM_ADDR_PROP, &error_abort); |
2cc0e2e8 DH |
209 | } |
210 | ||
c331d3e1 DH |
211 | static void pc_dimm_md_set_addr(MemoryDeviceState *md, uint64_t addr, |
212 | Error **errp) | |
213 | { | |
214 | object_property_set_uint(OBJECT(md), addr, PC_DIMM_ADDR_PROP, errp); | |
215 | } | |
216 | ||
3a0a2b0a DH |
217 | static MemoryRegion *pc_dimm_md_get_memory_region(MemoryDeviceState *md, |
218 | Error **errp) | |
219 | { | |
220 | return pc_dimm_get_memory_region(PC_DIMM(md), errp); | |
221 | } | |
222 | ||
2cc0e2e8 DH |
223 | static void pc_dimm_md_fill_device_info(const MemoryDeviceState *md, |
224 | MemoryDeviceInfo *info) | |
225 | { | |
226 | PCDIMMDeviceInfo *di = g_new0(PCDIMMDeviceInfo, 1); | |
227 | const DeviceClass *dc = DEVICE_GET_CLASS(md); | |
228 | const PCDIMMDevice *dimm = PC_DIMM(md); | |
229 | const DeviceState *dev = DEVICE(md); | |
230 | ||
231 | if (dev->id) { | |
232 | di->has_id = true; | |
233 | di->id = g_strdup(dev->id); | |
234 | } | |
235 | di->hotplugged = dev->hotplugged; | |
236 | di->hotpluggable = dc->hotpluggable; | |
237 | di->addr = dimm->addr; | |
238 | di->slot = dimm->slot; | |
239 | di->node = dimm->node; | |
240 | di->size = object_property_get_uint(OBJECT(dimm), PC_DIMM_SIZE_PROP, | |
241 | NULL); | |
242 | di->memdev = object_get_canonical_path(OBJECT(dimm->hostmem)); | |
243 | ||
244 | if (object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM)) { | |
245 | info->u.nvdimm.data = di; | |
246 | info->type = MEMORY_DEVICE_INFO_KIND_NVDIMM; | |
247 | } else { | |
248 | info->u.dimm.data = di; | |
249 | info->type = MEMORY_DEVICE_INFO_KIND_DIMM; | |
250 | } | |
251 | } | |
252 | ||
10b7e74b VL |
253 | static void pc_dimm_class_init(ObjectClass *oc, void *data) |
254 | { | |
255 | DeviceClass *dc = DEVICE_CLASS(oc); | |
256 | PCDIMMDeviceClass *ddc = PC_DIMM_CLASS(oc); | |
2cc0e2e8 | 257 | MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(oc); |
10b7e74b VL |
258 | |
259 | dc->realize = pc_dimm_realize; | |
2aece63c | 260 | dc->unrealize = pc_dimm_unrealize; |
10b7e74b | 261 | dc->props = pc_dimm_properties; |
bdd09778 | 262 | dc->desc = "DIMM memory module"; |
10b7e74b | 263 | |
a57d1911 | 264 | ddc->get_vmstate_memory_region = pc_dimm_get_memory_region; |
2cc0e2e8 DH |
265 | |
266 | mdc->get_addr = pc_dimm_md_get_addr; | |
c331d3e1 | 267 | mdc->set_addr = pc_dimm_md_set_addr; |
2cc0e2e8 | 268 | /* for a dimm plugged_size == region_size */ |
af390027 | 269 | mdc->get_plugged_size = memory_device_get_region_size; |
3a0a2b0a | 270 | mdc->get_memory_region = pc_dimm_md_get_memory_region; |
2cc0e2e8 | 271 | mdc->fill_device_info = pc_dimm_md_fill_device_info; |
10b7e74b VL |
272 | } |
273 | ||
274 | static TypeInfo pc_dimm_info = { | |
275 | .name = TYPE_PC_DIMM, | |
276 | .parent = TYPE_DEVICE, | |
277 | .instance_size = sizeof(PCDIMMDevice), | |
278 | .instance_init = pc_dimm_init, | |
279 | .class_init = pc_dimm_class_init, | |
280 | .class_size = sizeof(PCDIMMDeviceClass), | |
2cc0e2e8 DH |
281 | .interfaces = (InterfaceInfo[]) { |
282 | { TYPE_MEMORY_DEVICE }, | |
283 | { } | |
284 | }, | |
10b7e74b VL |
285 | }; |
286 | ||
287 | static void pc_dimm_register_types(void) | |
288 | { | |
289 | type_register_static(&pc_dimm_info); | |
290 | } | |
291 | ||
292 | type_init(pc_dimm_register_types) |