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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" |
d6fb213a XG |
26 | #include "qapi/error.h" |
27 | #include "qapi/visitor.h" | |
5c42eef2 XG |
28 | #include "hw/mem/nvdimm.h" |
29 | ||
d6fb213a XG |
30 | static void nvdimm_get_label_size(Object *obj, Visitor *v, const char *name, |
31 | void *opaque, Error **errp) | |
32 | { | |
33 | NVDIMMDevice *nvdimm = NVDIMM(obj); | |
34 | uint64_t value = nvdimm->label_size; | |
35 | ||
36 | visit_type_size(v, name, &value, errp); | |
37 | } | |
38 | ||
39 | static void nvdimm_set_label_size(Object *obj, Visitor *v, const char *name, | |
40 | void *opaque, Error **errp) | |
41 | { | |
42 | NVDIMMDevice *nvdimm = NVDIMM(obj); | |
43 | Error *local_err = NULL; | |
44 | uint64_t value; | |
45 | ||
46 | if (memory_region_size(&nvdimm->nvdimm_mr)) { | |
47 | error_setg(&local_err, "cannot change property value"); | |
48 | goto out; | |
49 | } | |
50 | ||
51 | visit_type_size(v, name, &value, &local_err); | |
52 | if (local_err) { | |
53 | goto out; | |
54 | } | |
55 | if (value < MIN_NAMESPACE_LABEL_SIZE) { | |
56 | error_setg(&local_err, "Property '%s.%s' (0x%" PRIx64 ") is required" | |
57 | " at least 0x%lx", object_get_typename(obj), | |
58 | name, value, MIN_NAMESPACE_LABEL_SIZE); | |
59 | goto out; | |
60 | } | |
61 | ||
62 | nvdimm->label_size = value; | |
63 | out: | |
64 | error_propagate(errp, local_err); | |
65 | } | |
66 | ||
cb836434 HZ |
67 | static bool nvdimm_get_unarmed(Object *obj, Error **errp) |
68 | { | |
69 | NVDIMMDevice *nvdimm = NVDIMM(obj); | |
70 | ||
71 | return nvdimm->unarmed; | |
72 | } | |
73 | ||
74 | static void nvdimm_set_unarmed(Object *obj, bool value, Error **errp) | |
75 | { | |
76 | NVDIMMDevice *nvdimm = NVDIMM(obj); | |
77 | Error *local_err = NULL; | |
78 | ||
79 | if (memory_region_size(&nvdimm->nvdimm_mr)) { | |
80 | error_setg(&local_err, "cannot change property value"); | |
81 | goto out; | |
82 | } | |
83 | ||
84 | nvdimm->unarmed = value; | |
85 | ||
86 | out: | |
87 | error_propagate(errp, local_err); | |
88 | } | |
89 | ||
d6fb213a XG |
90 | static void nvdimm_init(Object *obj) |
91 | { | |
da6789c2 | 92 | object_property_add(obj, NVDIMM_LABLE_SIZE_PROP, "int", |
d6fb213a XG |
93 | nvdimm_get_label_size, nvdimm_set_label_size, NULL, |
94 | NULL, NULL); | |
cb836434 HZ |
95 | object_property_add_bool(obj, NVDIMM_UNARMED_PROP, |
96 | nvdimm_get_unarmed, nvdimm_set_unarmed, NULL); | |
d6fb213a XG |
97 | } |
98 | ||
04790978 | 99 | static MemoryRegion *nvdimm_get_memory_region(PCDIMMDevice *dimm, Error **errp) |
d6fb213a XG |
100 | { |
101 | NVDIMMDevice *nvdimm = NVDIMM(dimm); | |
102 | ||
103 | return &nvdimm->nvdimm_mr; | |
104 | } | |
105 | ||
106 | static void nvdimm_realize(PCDIMMDevice *dimm, Error **errp) | |
107 | { | |
108 | MemoryRegion *mr = host_memory_backend_get_memory(dimm->hostmem, errp); | |
109 | NVDIMMDevice *nvdimm = NVDIMM(dimm); | |
110 | uint64_t align, pmem_size, size = memory_region_size(mr); | |
111 | ||
112 | align = memory_region_get_alignment(mr); | |
113 | ||
114 | pmem_size = size - nvdimm->label_size; | |
115 | nvdimm->label_data = memory_region_get_ram_ptr(mr) + pmem_size; | |
116 | pmem_size = QEMU_ALIGN_DOWN(pmem_size, align); | |
117 | ||
118 | if (size <= nvdimm->label_size || !pmem_size) { | |
119 | HostMemoryBackend *hostmem = dimm->hostmem; | |
120 | char *path = object_get_canonical_path_component(OBJECT(hostmem)); | |
121 | ||
122 | error_setg(errp, "the size of memdev %s (0x%" PRIx64 ") is too " | |
123 | "small to contain nvdimm label (0x%" PRIx64 ") and " | |
124 | "aligned PMEM (0x%" PRIx64 ")", | |
125 | path, memory_region_size(mr), nvdimm->label_size, align); | |
cdcab9d9 | 126 | g_free(path); |
d6fb213a XG |
127 | return; |
128 | } | |
129 | ||
130 | memory_region_init_alias(&nvdimm->nvdimm_mr, OBJECT(dimm), | |
131 | "nvdimm-memory", mr, 0, pmem_size); | |
132 | nvdimm->nvdimm_mr.align = align; | |
133 | } | |
134 | ||
135 | /* | |
136 | * the caller should check the input parameters before calling | |
137 | * label read/write functions. | |
138 | */ | |
139 | static void nvdimm_validate_rw_label_data(NVDIMMDevice *nvdimm, uint64_t size, | |
140 | uint64_t offset) | |
141 | { | |
142 | assert((nvdimm->label_size >= size + offset) && (offset + size > offset)); | |
143 | } | |
144 | ||
145 | static void nvdimm_read_label_data(NVDIMMDevice *nvdimm, void *buf, | |
146 | uint64_t size, uint64_t offset) | |
147 | { | |
148 | nvdimm_validate_rw_label_data(nvdimm, size, offset); | |
149 | ||
150 | memcpy(buf, nvdimm->label_data + offset, size); | |
151 | } | |
152 | ||
153 | static void nvdimm_write_label_data(NVDIMMDevice *nvdimm, const void *buf, | |
154 | uint64_t size, uint64_t offset) | |
155 | { | |
156 | MemoryRegion *mr; | |
157 | PCDIMMDevice *dimm = PC_DIMM(nvdimm); | |
158 | uint64_t backend_offset; | |
159 | ||
160 | nvdimm_validate_rw_label_data(nvdimm, size, offset); | |
161 | ||
162 | memcpy(nvdimm->label_data + offset, buf, size); | |
163 | ||
164 | mr = host_memory_backend_get_memory(dimm->hostmem, &error_abort); | |
165 | backend_offset = memory_region_size(mr) - nvdimm->label_size + offset; | |
166 | memory_region_set_dirty(mr, backend_offset, size); | |
167 | } | |
168 | ||
169 | static MemoryRegion *nvdimm_get_vmstate_memory_region(PCDIMMDevice *dimm) | |
170 | { | |
171 | return host_memory_backend_get_memory(dimm->hostmem, &error_abort); | |
172 | } | |
173 | ||
5c42eef2 XG |
174 | static void nvdimm_class_init(ObjectClass *oc, void *data) |
175 | { | |
d6fb213a XG |
176 | PCDIMMDeviceClass *ddc = PC_DIMM_CLASS(oc); |
177 | NVDIMMClass *nvc = NVDIMM_CLASS(oc); | |
5c42eef2 | 178 | |
d6fb213a XG |
179 | ddc->realize = nvdimm_realize; |
180 | ddc->get_memory_region = nvdimm_get_memory_region; | |
181 | ddc->get_vmstate_memory_region = nvdimm_get_vmstate_memory_region; | |
182 | ||
183 | nvc->read_label_data = nvdimm_read_label_data; | |
184 | nvc->write_label_data = nvdimm_write_label_data; | |
5c42eef2 XG |
185 | } |
186 | ||
187 | static TypeInfo nvdimm_info = { | |
188 | .name = TYPE_NVDIMM, | |
189 | .parent = TYPE_PC_DIMM, | |
d6fb213a | 190 | .class_size = sizeof(NVDIMMClass), |
5c42eef2 | 191 | .class_init = nvdimm_class_init, |
d6fb213a XG |
192 | .instance_size = sizeof(NVDIMMDevice), |
193 | .instance_init = nvdimm_init, | |
5c42eef2 XG |
194 | }; |
195 | ||
196 | static void nvdimm_register_types(void) | |
197 | { | |
198 | type_register_static(&nvdimm_info); | |
199 | } | |
200 | ||
201 | type_init(nvdimm_register_types) |