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5c42eef2 XG |
1 | /* |
2 | * Non-Volatile Dual In-line Memory Module Virtualization Implementation | |
3 | * | |
4 | * Copyright(C) 2015 Intel Corporation. | |
5 | * | |
6 | * Author: | |
7 | * Xiao Guangrong <guangrong.xiao@linux.intel.com> | |
8 | * | |
9 | * Currently, it only supports PMEM Virtualization. | |
10 | * | |
11 | * This library is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU Lesser General Public | |
13 | * License as published by the Free Software Foundation; either | |
14 | * version 2 of the License, or (at your option) any later version. | |
15 | * | |
16 | * This library is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * Lesser General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU Lesser General Public | |
22 | * License along with this library; if not, see <http://www.gnu.org/licenses/> | |
23 | */ | |
24 | ||
0430891c | 25 | #include "qemu/osdep.h" |
0b8fa32f | 26 | #include "qemu/module.h" |
faf8a13d | 27 | #include "qemu/pmem.h" |
d6fb213a XG |
28 | #include "qapi/error.h" |
29 | #include "qapi/visitor.h" | |
5c42eef2 | 30 | #include "hw/mem/nvdimm.h" |
3a0a2b0a | 31 | #include "hw/mem/memory-device.h" |
5c42eef2 | 32 | |
d6fb213a XG |
33 | static void nvdimm_get_label_size(Object *obj, Visitor *v, const char *name, |
34 | void *opaque, Error **errp) | |
35 | { | |
36 | NVDIMMDevice *nvdimm = NVDIMM(obj); | |
37 | uint64_t value = nvdimm->label_size; | |
38 | ||
39 | visit_type_size(v, name, &value, errp); | |
40 | } | |
41 | ||
42 | static void nvdimm_set_label_size(Object *obj, Visitor *v, const char *name, | |
43 | void *opaque, Error **errp) | |
44 | { | |
45 | NVDIMMDevice *nvdimm = NVDIMM(obj); | |
46 | Error *local_err = NULL; | |
47 | uint64_t value; | |
48 | ||
eb7fd4d0 | 49 | if (nvdimm->nvdimm_mr) { |
d6fb213a XG |
50 | error_setg(&local_err, "cannot change property value"); |
51 | goto out; | |
52 | } | |
53 | ||
54 | visit_type_size(v, name, &value, &local_err); | |
55 | if (local_err) { | |
56 | goto out; | |
57 | } | |
58 | if (value < MIN_NAMESPACE_LABEL_SIZE) { | |
59 | error_setg(&local_err, "Property '%s.%s' (0x%" PRIx64 ") is required" | |
60 | " at least 0x%lx", object_get_typename(obj), | |
61 | name, value, MIN_NAMESPACE_LABEL_SIZE); | |
62 | goto out; | |
63 | } | |
64 | ||
65 | nvdimm->label_size = value; | |
66 | out: | |
67 | error_propagate(errp, local_err); | |
68 | } | |
69 | ||
70 | static void nvdimm_init(Object *obj) | |
71 | { | |
1a97a478 | 72 | object_property_add(obj, NVDIMM_LABEL_SIZE_PROP, "int", |
d6fb213a XG |
73 | nvdimm_get_label_size, nvdimm_set_label_size, NULL, |
74 | NULL, NULL); | |
75 | } | |
76 | ||
eb7fd4d0 DH |
77 | static void nvdimm_finalize(Object *obj) |
78 | { | |
79 | NVDIMMDevice *nvdimm = NVDIMM(obj); | |
80 | ||
81 | g_free(nvdimm->nvdimm_mr); | |
82 | } | |
83 | ||
a4659a8e | 84 | static void nvdimm_prepare_memory_region(NVDIMMDevice *nvdimm, Error **errp) |
d6fb213a | 85 | { |
a4659a8e DH |
86 | PCDIMMDevice *dimm = PC_DIMM(nvdimm); |
87 | uint64_t align, pmem_size, size; | |
88 | MemoryRegion *mr; | |
d6fb213a | 89 | |
a4659a8e | 90 | g_assert(!nvdimm->nvdimm_mr); |
d6fb213a | 91 | |
a4659a8e DH |
92 | if (!dimm->hostmem) { |
93 | error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property must be set"); | |
94 | return; | |
95 | } | |
d6fb213a | 96 | |
a4659a8e | 97 | mr = host_memory_backend_get_memory(dimm->hostmem); |
d6fb213a | 98 | align = memory_region_get_alignment(mr); |
a4659a8e | 99 | size = memory_region_size(mr); |
d6fb213a XG |
100 | |
101 | pmem_size = size - nvdimm->label_size; | |
102 | nvdimm->label_data = memory_region_get_ram_ptr(mr) + pmem_size; | |
103 | pmem_size = QEMU_ALIGN_DOWN(pmem_size, align); | |
104 | ||
105 | if (size <= nvdimm->label_size || !pmem_size) { | |
106 | HostMemoryBackend *hostmem = dimm->hostmem; | |
107 | char *path = object_get_canonical_path_component(OBJECT(hostmem)); | |
108 | ||
109 | error_setg(errp, "the size of memdev %s (0x%" PRIx64 ") is too " | |
110 | "small to contain nvdimm label (0x%" PRIx64 ") and " | |
111 | "aligned PMEM (0x%" PRIx64 ")", | |
112 | path, memory_region_size(mr), nvdimm->label_size, align); | |
cdcab9d9 | 113 | g_free(path); |
d6fb213a XG |
114 | return; |
115 | } | |
116 | ||
eb7fd4d0 DH |
117 | nvdimm->nvdimm_mr = g_new(MemoryRegion, 1); |
118 | memory_region_init_alias(nvdimm->nvdimm_mr, OBJECT(dimm), | |
d6fb213a | 119 | "nvdimm-memory", mr, 0, pmem_size); |
640713d8 | 120 | memory_region_set_nonvolatile(nvdimm->nvdimm_mr, true); |
eb7fd4d0 | 121 | nvdimm->nvdimm_mr->align = align; |
d6fb213a XG |
122 | } |
123 | ||
3a0a2b0a DH |
124 | static MemoryRegion *nvdimm_md_get_memory_region(MemoryDeviceState *md, |
125 | Error **errp) | |
a4659a8e | 126 | { |
3a0a2b0a | 127 | NVDIMMDevice *nvdimm = NVDIMM(md); |
a4659a8e DH |
128 | Error *local_err = NULL; |
129 | ||
130 | if (!nvdimm->nvdimm_mr) { | |
131 | nvdimm_prepare_memory_region(nvdimm, &local_err); | |
132 | if (local_err) { | |
133 | error_propagate(errp, local_err); | |
134 | return NULL; | |
135 | } | |
136 | } | |
137 | return nvdimm->nvdimm_mr; | |
138 | } | |
139 | ||
140 | static void nvdimm_realize(PCDIMMDevice *dimm, Error **errp) | |
141 | { | |
142 | NVDIMMDevice *nvdimm = NVDIMM(dimm); | |
143 | ||
144 | if (!nvdimm->nvdimm_mr) { | |
145 | nvdimm_prepare_memory_region(nvdimm, errp); | |
146 | } | |
147 | } | |
148 | ||
d6fb213a XG |
149 | /* |
150 | * the caller should check the input parameters before calling | |
151 | * label read/write functions. | |
152 | */ | |
153 | static void nvdimm_validate_rw_label_data(NVDIMMDevice *nvdimm, uint64_t size, | |
154 | uint64_t offset) | |
155 | { | |
156 | assert((nvdimm->label_size >= size + offset) && (offset + size > offset)); | |
157 | } | |
158 | ||
159 | static void nvdimm_read_label_data(NVDIMMDevice *nvdimm, void *buf, | |
160 | uint64_t size, uint64_t offset) | |
161 | { | |
162 | nvdimm_validate_rw_label_data(nvdimm, size, offset); | |
163 | ||
164 | memcpy(buf, nvdimm->label_data + offset, size); | |
165 | } | |
166 | ||
167 | static void nvdimm_write_label_data(NVDIMMDevice *nvdimm, const void *buf, | |
168 | uint64_t size, uint64_t offset) | |
169 | { | |
170 | MemoryRegion *mr; | |
171 | PCDIMMDevice *dimm = PC_DIMM(nvdimm); | |
faf8a13d JH |
172 | bool is_pmem = object_property_get_bool(OBJECT(dimm->hostmem), |
173 | "pmem", NULL); | |
d6fb213a XG |
174 | uint64_t backend_offset; |
175 | ||
176 | nvdimm_validate_rw_label_data(nvdimm, size, offset); | |
177 | ||
faf8a13d JH |
178 | if (!is_pmem) { |
179 | memcpy(nvdimm->label_data + offset, buf, size); | |
180 | } else { | |
181 | pmem_memcpy_persist(nvdimm->label_data + offset, buf, size); | |
182 | } | |
d6fb213a | 183 | |
7943e97b | 184 | mr = host_memory_backend_get_memory(dimm->hostmem); |
d6fb213a XG |
185 | backend_offset = memory_region_size(mr) - nvdimm->label_size + offset; |
186 | memory_region_set_dirty(mr, backend_offset, size); | |
187 | } | |
188 | ||
5d10a0e1 DH |
189 | static Property nvdimm_properties[] = { |
190 | DEFINE_PROP_BOOL(NVDIMM_UNARMED_PROP, NVDIMMDevice, unarmed, false), | |
191 | DEFINE_PROP_END_OF_LIST(), | |
192 | }; | |
193 | ||
5c42eef2 XG |
194 | static void nvdimm_class_init(ObjectClass *oc, void *data) |
195 | { | |
d6fb213a | 196 | PCDIMMDeviceClass *ddc = PC_DIMM_CLASS(oc); |
3a0a2b0a | 197 | MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(oc); |
d6fb213a | 198 | NVDIMMClass *nvc = NVDIMM_CLASS(oc); |
5d10a0e1 | 199 | DeviceClass *dc = DEVICE_CLASS(oc); |
5c42eef2 | 200 | |
d6fb213a | 201 | ddc->realize = nvdimm_realize; |
3a0a2b0a | 202 | mdc->get_memory_region = nvdimm_md_get_memory_region; |
5d10a0e1 | 203 | dc->props = nvdimm_properties; |
d6fb213a XG |
204 | |
205 | nvc->read_label_data = nvdimm_read_label_data; | |
206 | nvc->write_label_data = nvdimm_write_label_data; | |
5c42eef2 XG |
207 | } |
208 | ||
209 | static TypeInfo nvdimm_info = { | |
210 | .name = TYPE_NVDIMM, | |
211 | .parent = TYPE_PC_DIMM, | |
d6fb213a | 212 | .class_size = sizeof(NVDIMMClass), |
5c42eef2 | 213 | .class_init = nvdimm_class_init, |
d6fb213a XG |
214 | .instance_size = sizeof(NVDIMMDevice), |
215 | .instance_init = nvdimm_init, | |
eb7fd4d0 | 216 | .instance_finalize = nvdimm_finalize, |
5c42eef2 XG |
217 | }; |
218 | ||
219 | static void nvdimm_register_types(void) | |
220 | { | |
221 | type_register_static(&nvdimm_info); | |
222 | } | |
223 | ||
224 | type_init(nvdimm_register_types) |