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4040ab72 DG |
1 | /* |
2 | * QEMU sPAPR VIO code | |
3 | * | |
4 | * Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com> | |
5 | * Based on the s390 virtio bus code: | |
6 | * Copyright (c) 2009 Alexander Graf <agraf@suse.de> | |
7 | * | |
8 | * This library is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2 of the License, or (at your option) any later version. | |
12 | * | |
13 | * This library is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
22 | #include "hw.h" | |
23 | #include "sysemu.h" | |
24 | #include "boards.h" | |
25 | #include "monitor.h" | |
26 | #include "loader.h" | |
27 | #include "elf.h" | |
28 | #include "hw/sysbus.h" | |
29 | #include "kvm.h" | |
30 | #include "device_tree.h" | |
31 | ||
32 | #include "hw/spapr.h" | |
33 | #include "hw/spapr_vio.h" | |
34 | ||
35 | #ifdef CONFIG_FDT | |
36 | #include <libfdt.h> | |
37 | #endif /* CONFIG_FDT */ | |
38 | ||
39 | /* #define DEBUG_SPAPR */ | |
40 | ||
41 | #ifdef DEBUG_SPAPR | |
42 | #define dprintf(fmt, ...) \ | |
43 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) | |
44 | #else | |
45 | #define dprintf(fmt, ...) \ | |
46 | do { } while (0) | |
47 | #endif | |
48 | ||
49 | static struct BusInfo spapr_vio_bus_info = { | |
50 | .name = "spapr-vio", | |
51 | .size = sizeof(VIOsPAPRBus), | |
52 | }; | |
53 | ||
54 | VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg) | |
55 | { | |
56 | DeviceState *qdev; | |
57 | VIOsPAPRDevice *dev = NULL; | |
58 | ||
59 | QLIST_FOREACH(qdev, &bus->bus.children, sibling) { | |
60 | dev = (VIOsPAPRDevice *)qdev; | |
61 | if (dev->reg == reg) { | |
62 | break; | |
63 | } | |
64 | } | |
65 | ||
66 | return dev; | |
67 | } | |
68 | ||
69 | #ifdef CONFIG_FDT | |
70 | static int vio_make_devnode(VIOsPAPRDevice *dev, | |
71 | void *fdt) | |
72 | { | |
73 | VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)dev->qdev.info; | |
74 | int vdevice_off, node_off; | |
75 | int ret; | |
76 | ||
77 | vdevice_off = fdt_path_offset(fdt, "/vdevice"); | |
78 | if (vdevice_off < 0) { | |
79 | return vdevice_off; | |
80 | } | |
81 | ||
82 | node_off = fdt_add_subnode(fdt, vdevice_off, dev->qdev.id); | |
83 | if (node_off < 0) { | |
84 | return node_off; | |
85 | } | |
86 | ||
87 | ret = fdt_setprop_cell(fdt, node_off, "reg", dev->reg); | |
88 | if (ret < 0) { | |
89 | return ret; | |
90 | } | |
91 | ||
92 | if (info->dt_type) { | |
93 | ret = fdt_setprop_string(fdt, node_off, "device_type", | |
94 | info->dt_type); | |
95 | if (ret < 0) { | |
96 | return ret; | |
97 | } | |
98 | } | |
99 | ||
100 | if (info->dt_compatible) { | |
101 | ret = fdt_setprop_string(fdt, node_off, "compatible", | |
102 | info->dt_compatible); | |
103 | if (ret < 0) { | |
104 | return ret; | |
105 | } | |
106 | } | |
107 | ||
108 | if (info->devnode) { | |
109 | ret = (info->devnode)(dev, fdt, node_off); | |
110 | if (ret < 0) { | |
111 | return ret; | |
112 | } | |
113 | } | |
114 | ||
115 | return node_off; | |
116 | } | |
117 | #endif /* CONFIG_FDT */ | |
118 | ||
119 | static int spapr_vio_busdev_init(DeviceState *qdev, DeviceInfo *qinfo) | |
120 | { | |
121 | VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)qinfo; | |
122 | VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev; | |
123 | char *id; | |
124 | ||
125 | if (asprintf(&id, "%s@%x", info->dt_name, dev->reg) < 0) { | |
126 | return -1; | |
127 | } | |
128 | ||
129 | dev->qdev.id = id; | |
130 | ||
131 | return info->init(dev); | |
132 | } | |
133 | ||
134 | void spapr_vio_bus_register_withprop(VIOsPAPRDeviceInfo *info) | |
135 | { | |
136 | info->qdev.init = spapr_vio_busdev_init; | |
137 | info->qdev.bus_info = &spapr_vio_bus_info; | |
138 | ||
139 | assert(info->qdev.size >= sizeof(VIOsPAPRDevice)); | |
140 | qdev_register(&info->qdev); | |
141 | } | |
142 | ||
143 | VIOsPAPRBus *spapr_vio_bus_init(void) | |
144 | { | |
145 | VIOsPAPRBus *bus; | |
146 | BusState *qbus; | |
147 | DeviceState *dev; | |
148 | DeviceInfo *qinfo; | |
149 | ||
150 | /* Create bridge device */ | |
151 | dev = qdev_create(NULL, "spapr-vio-bridge"); | |
152 | qdev_init_nofail(dev); | |
153 | ||
154 | /* Create bus on bridge device */ | |
155 | ||
156 | qbus = qbus_create(&spapr_vio_bus_info, dev, "spapr-vio"); | |
157 | bus = DO_UPCAST(VIOsPAPRBus, bus, qbus); | |
158 | ||
159 | for (qinfo = device_info_list; qinfo; qinfo = qinfo->next) { | |
160 | VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)qinfo; | |
161 | ||
162 | if (qinfo->bus_info != &spapr_vio_bus_info) { | |
163 | continue; | |
164 | } | |
165 | ||
166 | if (info->hcalls) { | |
167 | info->hcalls(bus); | |
168 | } | |
169 | } | |
170 | ||
171 | return bus; | |
172 | } | |
173 | ||
174 | /* Represents sPAPR hcall VIO devices */ | |
175 | ||
176 | static int spapr_vio_bridge_init(SysBusDevice *dev) | |
177 | { | |
178 | /* nothing */ | |
179 | return 0; | |
180 | } | |
181 | ||
182 | static SysBusDeviceInfo spapr_vio_bridge_info = { | |
183 | .init = spapr_vio_bridge_init, | |
184 | .qdev.name = "spapr-vio-bridge", | |
185 | .qdev.size = sizeof(SysBusDevice), | |
186 | .qdev.no_user = 1, | |
187 | }; | |
188 | ||
189 | static void spapr_vio_register_devices(void) | |
190 | { | |
191 | sysbus_register_withprop(&spapr_vio_bridge_info); | |
192 | } | |
193 | ||
194 | device_init(spapr_vio_register_devices) | |
195 | ||
196 | #ifdef CONFIG_FDT | |
197 | int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt) | |
198 | { | |
199 | DeviceState *qdev; | |
200 | int ret = 0; | |
201 | ||
202 | QLIST_FOREACH(qdev, &bus->bus.children, sibling) { | |
203 | VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev; | |
204 | ||
205 | ret = vio_make_devnode(dev, fdt); | |
206 | ||
207 | if (ret < 0) { | |
208 | return ret; | |
209 | } | |
210 | } | |
211 | ||
212 | return 0; | |
213 | } | |
214 | #endif /* CONFIG_FDT */ |