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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" |
a44432b4 | 22 | #include "hw/boards.h" |
10b7e74b | 23 | #include "hw/mem/pc-dimm.h" |
a27bd6c7 | 24 | #include "hw/qdev-properties.h" |
d6454270 | 25 | #include "migration/vmstate.h" |
6388e18d | 26 | #include "hw/mem/nvdimm.h" |
2cc0e2e8 | 27 | #include "hw/mem/memory-device.h" |
da34e65c | 28 | #include "qapi/error.h" |
10b7e74b | 29 | #include "qapi/visitor.h" |
0b8fa32f | 30 | #include "qemu/module.h" |
b58c5c2d | 31 | #include "sysemu/hostmem.h" |
e35704ba | 32 | #include "sysemu/numa.h" |
43bbb49e | 33 | #include "trace.h" |
9967c949 | 34 | |
9995c759 DH |
35 | static int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp); |
36 | ||
fd3416f5 | 37 | void pc_dimm_pre_plug(PCDIMMDevice *dimm, MachineState *machine, |
b0e62443 | 38 | const uint64_t *legacy_align, Error **errp) |
8f1ffe5b DH |
39 | { |
40 | Error *local_err = NULL; | |
41 | int slot; | |
42 | ||
fd3416f5 | 43 | slot = object_property_get_int(OBJECT(dimm), PC_DIMM_SLOT_PROP, |
8f1ffe5b | 44 | &error_abort); |
22235bb6 IM |
45 | if ((slot < 0 || slot >= machine->ram_slots) && |
46 | slot != PC_DIMM_UNASSIGNED_SLOT) { | |
f4eaf69e WSM |
47 | error_setg(&local_err, "invalid slot number %d, valid range is [0-%" |
48 | PRIu64 "]", slot, machine->ram_slots - 1); | |
22235bb6 IM |
49 | goto out; |
50 | } | |
51 | ||
8f1ffe5b DH |
52 | slot = pc_dimm_get_free_slot(slot == PC_DIMM_UNASSIGNED_SLOT ? NULL : &slot, |
53 | machine->ram_slots, &local_err); | |
54 | if (local_err) { | |
55 | goto out; | |
56 | } | |
5325cc34 | 57 | object_property_set_int(OBJECT(dimm), PC_DIMM_SLOT_PROP, slot, |
fd3416f5 | 58 | &error_abort); |
8f1ffe5b | 59 | trace_mhp_pc_dimm_assigned_slot(slot); |
b0e62443 | 60 | |
6ef2c0f2 DH |
61 | memory_device_pre_plug(MEMORY_DEVICE(dimm), machine, legacy_align, |
62 | &local_err); | |
8f1ffe5b DH |
63 | out: |
64 | error_propagate(errp, local_err); | |
65 | } | |
66 | ||
fd3416f5 | 67 | void pc_dimm_plug(PCDIMMDevice *dimm, MachineState *machine, Error **errp) |
43bbb49e | 68 | { |
8df1426e | 69 | PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm); |
a57d1911 DH |
70 | MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm, |
71 | &error_abort); | |
43bbb49e | 72 | |
55d67a04 | 73 | memory_device_plug(MEMORY_DEVICE(dimm), machine); |
fd3416f5 | 74 | vmstate_register_ram(vmstate_mr, DEVICE(dimm)); |
43bbb49e BR |
75 | } |
76 | ||
fd3416f5 | 77 | void pc_dimm_unplug(PCDIMMDevice *dimm, MachineState *machine) |
43bbb49e | 78 | { |
8df1426e | 79 | PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm); |
a57d1911 DH |
80 | MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm, |
81 | &error_abort); | |
fa9ea81d | 82 | |
8288590d | 83 | memory_device_unplug(MEMORY_DEVICE(dimm), machine); |
fd3416f5 | 84 | vmstate_unregister_ram(vmstate_mr, DEVICE(dimm)); |
43bbb49e BR |
85 | } |
86 | ||
0cd03d89 IM |
87 | static int pc_dimm_slot2bitmap(Object *obj, void *opaque) |
88 | { | |
89 | unsigned long *bitmap = opaque; | |
90 | ||
91 | if (object_dynamic_cast(obj, TYPE_PC_DIMM)) { | |
92 | DeviceState *dev = DEVICE(obj); | |
93 | if (dev->realized) { /* count only realized DIMMs */ | |
94 | PCDIMMDevice *d = PC_DIMM(obj); | |
95 | set_bit(d->slot, bitmap); | |
96 | } | |
97 | } | |
98 | ||
99 | object_child_foreach(obj, pc_dimm_slot2bitmap, opaque); | |
100 | return 0; | |
101 | } | |
102 | ||
9995c759 | 103 | static int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp) |
0cd03d89 | 104 | { |
3ff333ef | 105 | unsigned long *bitmap; |
0cd03d89 IM |
106 | int slot = 0; |
107 | ||
3ff333ef DH |
108 | if (max_slots <= 0) { |
109 | error_setg(errp, "no slots where allocated, please specify " | |
110 | "the 'slots' option"); | |
111 | return slot; | |
112 | } | |
113 | ||
114 | bitmap = bitmap_new(max_slots); | |
0cd03d89 IM |
115 | object_child_foreach(qdev_get_machine(), pc_dimm_slot2bitmap, bitmap); |
116 | ||
117 | /* check if requested slot is not occupied */ | |
118 | if (hint) { | |
119 | if (*hint >= max_slots) { | |
120 | error_setg(errp, "invalid slot# %d, should be less than %d", | |
121 | *hint, max_slots); | |
122 | } else if (!test_bit(*hint, bitmap)) { | |
123 | slot = *hint; | |
124 | } else { | |
125 | error_setg(errp, "slot %d is busy", *hint); | |
126 | } | |
127 | goto out; | |
128 | } | |
129 | ||
130 | /* search for free slot */ | |
131 | slot = find_first_zero_bit(bitmap, max_slots); | |
132 | if (slot == max_slots) { | |
133 | error_setg(errp, "no free slots available"); | |
134 | } | |
135 | out: | |
136 | g_free(bitmap); | |
137 | return slot; | |
138 | } | |
139 | ||
10b7e74b VL |
140 | static Property pc_dimm_properties[] = { |
141 | DEFINE_PROP_UINT64(PC_DIMM_ADDR_PROP, PCDIMMDevice, addr, 0), | |
142 | DEFINE_PROP_UINT32(PC_DIMM_NODE_PROP, PCDIMMDevice, node, 0), | |
143 | DEFINE_PROP_INT32(PC_DIMM_SLOT_PROP, PCDIMMDevice, slot, | |
144 | PC_DIMM_UNASSIGNED_SLOT), | |
2de7e268 FZ |
145 | DEFINE_PROP_LINK(PC_DIMM_MEMDEV_PROP, PCDIMMDevice, hostmem, |
146 | TYPE_MEMORY_BACKEND, HostMemoryBackend *), | |
10b7e74b VL |
147 | DEFINE_PROP_END_OF_LIST(), |
148 | }; | |
149 | ||
d7bce999 EB |
150 | static void pc_dimm_get_size(Object *obj, Visitor *v, const char *name, |
151 | void *opaque, Error **errp) | |
10b7e74b | 152 | { |
946d6154 | 153 | Error *local_err = NULL; |
b053ef61 | 154 | uint64_t value; |
10b7e74b | 155 | |
946d6154 DH |
156 | value = memory_device_get_region_size(MEMORY_DEVICE(obj), &local_err); |
157 | if (local_err) { | |
158 | error_propagate(errp, local_err); | |
04790978 TH |
159 | return; |
160 | } | |
10b7e74b | 161 | |
b053ef61 | 162 | visit_type_uint64(v, name, &value, errp); |
10b7e74b VL |
163 | } |
164 | ||
165 | static void pc_dimm_init(Object *obj) | |
166 | { | |
b053ef61 | 167 | object_property_add(obj, PC_DIMM_SIZE_PROP, "uint64", pc_dimm_get_size, |
d2623129 | 168 | NULL, NULL, NULL); |
10b7e74b VL |
169 | } |
170 | ||
171 | static void pc_dimm_realize(DeviceState *dev, Error **errp) | |
172 | { | |
173 | PCDIMMDevice *dimm = PC_DIMM(dev); | |
9f318f8f | 174 | PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm); |
aa570207 TX |
175 | MachineState *ms = MACHINE(qdev_get_machine()); |
176 | int nb_numa_nodes = ms->numa_state->num_nodes; | |
10b7e74b VL |
177 | |
178 | if (!dimm->hostmem) { | |
179 | error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property is not set"); | |
180 | return; | |
2de7e268 FZ |
181 | } else if (host_memory_backend_is_mapped(dimm->hostmem)) { |
182 | char *path = object_get_canonical_path_component(OBJECT(dimm->hostmem)); | |
183 | error_setg(errp, "can't use already busy memdev: %s", path); | |
184 | g_free(path); | |
185 | return; | |
10b7e74b | 186 | } |
32532f21 BR |
187 | if (((nb_numa_nodes > 0) && (dimm->node >= nb_numa_nodes)) || |
188 | (!nb_numa_nodes && dimm->node)) { | |
988eba0f MT |
189 | error_setg(errp, "'DIMM property " PC_DIMM_NODE_PROP " has value %" |
190 | PRIu32 "' which exceeds the number of numa nodes: %d", | |
32532f21 | 191 | dimm->node, nb_numa_nodes ? nb_numa_nodes : 1); |
cfe0ffd0 HT |
192 | return; |
193 | } | |
9f318f8f XG |
194 | |
195 | if (ddc->realize) { | |
196 | ddc->realize(dimm, errp); | |
197 | } | |
2aece63c XG |
198 | |
199 | host_memory_backend_set_mapped(dimm->hostmem, true); | |
200 | } | |
201 | ||
b69c3c21 | 202 | static void pc_dimm_unrealize(DeviceState *dev) |
2aece63c XG |
203 | { |
204 | PCDIMMDevice *dimm = PC_DIMM(dev); | |
205 | ||
206 | host_memory_backend_set_mapped(dimm->hostmem, false); | |
10b7e74b VL |
207 | } |
208 | ||
04790978 | 209 | static MemoryRegion *pc_dimm_get_memory_region(PCDIMMDevice *dimm, Error **errp) |
10b7e74b | 210 | { |
04790978 TH |
211 | if (!dimm->hostmem) { |
212 | error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property must be set"); | |
213 | return NULL; | |
214 | } | |
215 | ||
7943e97b | 216 | return host_memory_backend_get_memory(dimm->hostmem); |
10b7e74b VL |
217 | } |
218 | ||
2cc0e2e8 DH |
219 | static uint64_t pc_dimm_md_get_addr(const MemoryDeviceState *md) |
220 | { | |
12d814e9 WSM |
221 | return object_property_get_uint(OBJECT(md), PC_DIMM_ADDR_PROP, |
222 | &error_abort); | |
2cc0e2e8 DH |
223 | } |
224 | ||
c331d3e1 DH |
225 | static void pc_dimm_md_set_addr(MemoryDeviceState *md, uint64_t addr, |
226 | Error **errp) | |
227 | { | |
5325cc34 | 228 | object_property_set_uint(OBJECT(md), PC_DIMM_ADDR_PROP, addr, errp); |
c331d3e1 DH |
229 | } |
230 | ||
3a0a2b0a DH |
231 | static MemoryRegion *pc_dimm_md_get_memory_region(MemoryDeviceState *md, |
232 | Error **errp) | |
233 | { | |
234 | return pc_dimm_get_memory_region(PC_DIMM(md), errp); | |
235 | } | |
236 | ||
2cc0e2e8 DH |
237 | static void pc_dimm_md_fill_device_info(const MemoryDeviceState *md, |
238 | MemoryDeviceInfo *info) | |
239 | { | |
240 | PCDIMMDeviceInfo *di = g_new0(PCDIMMDeviceInfo, 1); | |
241 | const DeviceClass *dc = DEVICE_GET_CLASS(md); | |
242 | const PCDIMMDevice *dimm = PC_DIMM(md); | |
243 | const DeviceState *dev = DEVICE(md); | |
244 | ||
245 | if (dev->id) { | |
246 | di->has_id = true; | |
247 | di->id = g_strdup(dev->id); | |
248 | } | |
249 | di->hotplugged = dev->hotplugged; | |
250 | di->hotpluggable = dc->hotpluggable; | |
251 | di->addr = dimm->addr; | |
252 | di->slot = dimm->slot; | |
253 | di->node = dimm->node; | |
254 | di->size = object_property_get_uint(OBJECT(dimm), PC_DIMM_SIZE_PROP, | |
255 | NULL); | |
256 | di->memdev = object_get_canonical_path(OBJECT(dimm->hostmem)); | |
257 | ||
258 | if (object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM)) { | |
259 | info->u.nvdimm.data = di; | |
260 | info->type = MEMORY_DEVICE_INFO_KIND_NVDIMM; | |
261 | } else { | |
262 | info->u.dimm.data = di; | |
263 | info->type = MEMORY_DEVICE_INFO_KIND_DIMM; | |
264 | } | |
265 | } | |
266 | ||
10b7e74b VL |
267 | static void pc_dimm_class_init(ObjectClass *oc, void *data) |
268 | { | |
269 | DeviceClass *dc = DEVICE_CLASS(oc); | |
270 | PCDIMMDeviceClass *ddc = PC_DIMM_CLASS(oc); | |
2cc0e2e8 | 271 | MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(oc); |
10b7e74b VL |
272 | |
273 | dc->realize = pc_dimm_realize; | |
2aece63c | 274 | dc->unrealize = pc_dimm_unrealize; |
4f67d30b | 275 | device_class_set_props(dc, pc_dimm_properties); |
bdd09778 | 276 | dc->desc = "DIMM memory module"; |
10b7e74b | 277 | |
a57d1911 | 278 | ddc->get_vmstate_memory_region = pc_dimm_get_memory_region; |
2cc0e2e8 DH |
279 | |
280 | mdc->get_addr = pc_dimm_md_get_addr; | |
c331d3e1 | 281 | mdc->set_addr = pc_dimm_md_set_addr; |
2cc0e2e8 | 282 | /* for a dimm plugged_size == region_size */ |
af390027 | 283 | mdc->get_plugged_size = memory_device_get_region_size; |
3a0a2b0a | 284 | mdc->get_memory_region = pc_dimm_md_get_memory_region; |
2cc0e2e8 | 285 | mdc->fill_device_info = pc_dimm_md_fill_device_info; |
10b7e74b VL |
286 | } |
287 | ||
288 | static TypeInfo pc_dimm_info = { | |
289 | .name = TYPE_PC_DIMM, | |
290 | .parent = TYPE_DEVICE, | |
291 | .instance_size = sizeof(PCDIMMDevice), | |
292 | .instance_init = pc_dimm_init, | |
293 | .class_init = pc_dimm_class_init, | |
294 | .class_size = sizeof(PCDIMMDeviceClass), | |
2cc0e2e8 DH |
295 | .interfaces = (InterfaceInfo[]) { |
296 | { TYPE_MEMORY_DEVICE }, | |
297 | { } | |
298 | }, | |
10b7e74b VL |
299 | }; |
300 | ||
301 | static void pc_dimm_register_types(void) | |
302 | { | |
303 | type_register_static(&pc_dimm_info); | |
304 | } | |
305 | ||
306 | type_init(pc_dimm_register_types) |