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340d96e7 PB |
1 | /* |
2 | * Virtio Syborg bindings | |
3 | * | |
4 | * Copyright (c) 2009 CodeSourcery | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | ||
25 | #include "syborg.h" | |
26 | #include "sysbus.h" | |
27 | #include "virtio.h" | |
28 | #include "sysemu.h" | |
29 | ||
30 | //#define DEBUG_SYBORG_VIRTIO | |
31 | ||
32 | #ifdef DEBUG_SYBORG_VIRTIO | |
33 | #define DPRINTF(fmt, ...) \ | |
34 | do { printf("syborg_virtio: " fmt , ## __VA_ARGS__); } while (0) | |
35 | #define BADF(fmt, ...) \ | |
36 | do { fprintf(stderr, "syborg_virtio: error: " fmt , ## __VA_ARGS__); \ | |
37 | exit(1);} while (0) | |
38 | #else | |
39 | #define DPRINTF(fmt, ...) do {} while(0) | |
40 | #define BADF(fmt, ...) \ | |
41 | do { fprintf(stderr, "syborg_virtio: error: " fmt , ## __VA_ARGS__);} while (0) | |
42 | #endif | |
43 | ||
44 | enum { | |
45 | SYBORG_VIRTIO_ID = 0, | |
46 | SYBORG_VIRTIO_DEVTYPE = 1, | |
47 | SYBORG_VIRTIO_HOST_FEATURES = 2, | |
48 | SYBORG_VIRTIO_GUEST_FEATURES = 3, | |
49 | SYBORG_VIRTIO_QUEUE_BASE = 4, | |
50 | SYBORG_VIRTIO_QUEUE_NUM = 5, | |
51 | SYBORG_VIRTIO_QUEUE_SEL = 6, | |
52 | SYBORG_VIRTIO_QUEUE_NOTIFY = 7, | |
53 | SYBORG_VIRTIO_STATUS = 8, | |
54 | SYBORG_VIRTIO_INT_ENABLE = 9, | |
55 | SYBORG_VIRTIO_INT_STATUS = 10 | |
56 | }; | |
57 | ||
58 | #define SYBORG_VIRTIO_CONFIG 0x100 | |
59 | ||
60 | /* Device independent interface. */ | |
61 | ||
62 | typedef struct { | |
63 | SysBusDevice busdev; | |
64 | VirtIODevice *vdev; | |
65 | qemu_irq irq; | |
66 | uint32_t int_enable; | |
67 | uint32_t id; | |
97b15621 | 68 | NICConf nic; |
340d96e7 PB |
69 | } SyborgVirtIOProxy; |
70 | ||
c227f099 | 71 | static uint32_t syborg_virtio_readl(void *opaque, target_phys_addr_t offset) |
340d96e7 PB |
72 | { |
73 | SyborgVirtIOProxy *s = opaque; | |
74 | VirtIODevice *vdev = s->vdev; | |
75 | uint32_t ret; | |
76 | ||
77 | DPRINTF("readl 0x%x\n", (int)offset); | |
78 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
79 | return virtio_config_readl(vdev, offset - SYBORG_VIRTIO_CONFIG); | |
80 | } | |
81 | switch(offset >> 2) { | |
82 | case SYBORG_VIRTIO_ID: | |
83 | ret = SYBORG_ID_VIRTIO; | |
84 | break; | |
85 | case SYBORG_VIRTIO_DEVTYPE: | |
86 | ret = s->id; | |
87 | break; | |
88 | case SYBORG_VIRTIO_HOST_FEATURES: | |
89 | ret = vdev->get_features(vdev); | |
90 | ret |= (1 << VIRTIO_F_NOTIFY_ON_EMPTY); | |
91 | break; | |
92 | case SYBORG_VIRTIO_GUEST_FEATURES: | |
93 | ret = vdev->features; | |
94 | break; | |
95 | case SYBORG_VIRTIO_QUEUE_BASE: | |
96 | ret = virtio_queue_get_addr(vdev, vdev->queue_sel); | |
97 | break; | |
98 | case SYBORG_VIRTIO_QUEUE_NUM: | |
99 | ret = virtio_queue_get_num(vdev, vdev->queue_sel); | |
100 | break; | |
101 | case SYBORG_VIRTIO_QUEUE_SEL: | |
102 | ret = vdev->queue_sel; | |
103 | break; | |
104 | case SYBORG_VIRTIO_STATUS: | |
105 | ret = vdev->status; | |
106 | break; | |
107 | case SYBORG_VIRTIO_INT_ENABLE: | |
108 | ret = s->int_enable; | |
109 | break; | |
110 | case SYBORG_VIRTIO_INT_STATUS: | |
111 | ret = vdev->isr; | |
112 | break; | |
113 | default: | |
114 | BADF("Bad read offset 0x%x\n", (int)offset); | |
115 | return 0; | |
116 | } | |
117 | return ret; | |
118 | } | |
119 | ||
c227f099 | 120 | static void syborg_virtio_writel(void *opaque, target_phys_addr_t offset, |
340d96e7 PB |
121 | uint32_t value) |
122 | { | |
123 | SyborgVirtIOProxy *s = opaque; | |
124 | VirtIODevice *vdev = s->vdev; | |
125 | ||
126 | DPRINTF("writel 0x%x = 0x%x\n", (int)offset, value); | |
127 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
128 | return virtio_config_writel(vdev, offset - SYBORG_VIRTIO_CONFIG, | |
129 | value); | |
130 | } | |
131 | switch (offset >> 2) { | |
132 | case SYBORG_VIRTIO_GUEST_FEATURES: | |
133 | if (vdev->set_features) | |
134 | vdev->set_features(vdev, value); | |
135 | vdev->features = value; | |
136 | break; | |
137 | case SYBORG_VIRTIO_QUEUE_BASE: | |
7055e687 MT |
138 | if (value == 0) |
139 | virtio_reset(vdev); | |
140 | else | |
141 | virtio_queue_set_addr(vdev, vdev->queue_sel, value); | |
340d96e7 PB |
142 | break; |
143 | case SYBORG_VIRTIO_QUEUE_SEL: | |
144 | if (value < VIRTIO_PCI_QUEUE_MAX) | |
145 | vdev->queue_sel = value; | |
146 | break; | |
147 | case SYBORG_VIRTIO_QUEUE_NOTIFY: | |
148 | virtio_queue_notify(vdev, value); | |
149 | break; | |
150 | case SYBORG_VIRTIO_STATUS: | |
151 | vdev->status = value & 0xFF; | |
152 | if (vdev->status == 0) | |
153 | virtio_reset(vdev); | |
154 | break; | |
155 | case SYBORG_VIRTIO_INT_ENABLE: | |
156 | s->int_enable = value; | |
157 | virtio_update_irq(vdev); | |
158 | break; | |
159 | case SYBORG_VIRTIO_INT_STATUS: | |
160 | vdev->isr &= ~value; | |
161 | virtio_update_irq(vdev); | |
162 | break; | |
163 | default: | |
164 | BADF("Bad write offset 0x%x\n", (int)offset); | |
165 | break; | |
166 | } | |
167 | } | |
168 | ||
c227f099 | 169 | static uint32_t syborg_virtio_readw(void *opaque, target_phys_addr_t offset) |
340d96e7 PB |
170 | { |
171 | SyborgVirtIOProxy *s = opaque; | |
172 | VirtIODevice *vdev = s->vdev; | |
173 | ||
174 | DPRINTF("readw 0x%x\n", (int)offset); | |
175 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
176 | return virtio_config_readw(vdev, offset - SYBORG_VIRTIO_CONFIG); | |
177 | } | |
178 | BADF("Bad halfword read offset 0x%x\n", (int)offset); | |
179 | return -1; | |
180 | } | |
181 | ||
c227f099 | 182 | static void syborg_virtio_writew(void *opaque, target_phys_addr_t offset, |
340d96e7 PB |
183 | uint32_t value) |
184 | { | |
185 | SyborgVirtIOProxy *s = opaque; | |
186 | VirtIODevice *vdev = s->vdev; | |
187 | ||
188 | DPRINTF("writew 0x%x = 0x%x\n", (int)offset, value); | |
189 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
190 | return virtio_config_writew(vdev, offset - SYBORG_VIRTIO_CONFIG, | |
191 | value); | |
192 | } | |
193 | BADF("Bad halfword write offset 0x%x\n", (int)offset); | |
194 | } | |
195 | ||
c227f099 | 196 | static uint32_t syborg_virtio_readb(void *opaque, target_phys_addr_t offset) |
340d96e7 PB |
197 | { |
198 | SyborgVirtIOProxy *s = opaque; | |
199 | VirtIODevice *vdev = s->vdev; | |
200 | ||
201 | DPRINTF("readb 0x%x\n", (int)offset); | |
202 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
203 | return virtio_config_readb(vdev, offset - SYBORG_VIRTIO_CONFIG); | |
204 | } | |
205 | BADF("Bad byte read offset 0x%x\n", (int)offset); | |
206 | return -1; | |
207 | } | |
208 | ||
c227f099 | 209 | static void syborg_virtio_writeb(void *opaque, target_phys_addr_t offset, |
340d96e7 PB |
210 | uint32_t value) |
211 | { | |
212 | SyborgVirtIOProxy *s = opaque; | |
213 | VirtIODevice *vdev = s->vdev; | |
214 | ||
215 | DPRINTF("writeb 0x%x = 0x%x\n", (int)offset, value); | |
216 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
217 | return virtio_config_writeb(vdev, offset - SYBORG_VIRTIO_CONFIG, | |
218 | value); | |
219 | } | |
220 | BADF("Bad byte write offset 0x%x\n", (int)offset); | |
221 | } | |
222 | ||
d60efc6b | 223 | static CPUReadMemoryFunc * const syborg_virtio_readfn[] = { |
340d96e7 PB |
224 | syborg_virtio_readb, |
225 | syborg_virtio_readw, | |
226 | syborg_virtio_readl | |
227 | }; | |
228 | ||
d60efc6b | 229 | static CPUWriteMemoryFunc * const syborg_virtio_writefn[] = { |
340d96e7 PB |
230 | syborg_virtio_writeb, |
231 | syborg_virtio_writew, | |
232 | syborg_virtio_writel | |
233 | }; | |
234 | ||
7055e687 | 235 | static void syborg_virtio_update_irq(void *opaque, uint16_t vector) |
340d96e7 PB |
236 | { |
237 | SyborgVirtIOProxy *proxy = opaque; | |
238 | int level; | |
239 | ||
240 | level = proxy->int_enable & proxy->vdev->isr; | |
241 | DPRINTF("IRQ %d\n", level); | |
242 | qemu_set_irq(proxy->irq, level != 0); | |
243 | } | |
244 | ||
245 | static VirtIOBindings syborg_virtio_bindings = { | |
7055e687 | 246 | .notify = syborg_virtio_update_irq |
340d96e7 PB |
247 | }; |
248 | ||
81a322d4 | 249 | static int syborg_virtio_init(SyborgVirtIOProxy *proxy, VirtIODevice *vdev) |
340d96e7 PB |
250 | { |
251 | int iomemtype; | |
252 | ||
253 | proxy->vdev = vdev; | |
254 | ||
7055e687 MT |
255 | /* Don't support multiple vectors */ |
256 | proxy->vdev->nvectors = 0; | |
340d96e7 | 257 | sysbus_init_irq(&proxy->busdev, &proxy->irq); |
1eed09cb | 258 | iomemtype = cpu_register_io_memory(syborg_virtio_readfn, |
340d96e7 PB |
259 | syborg_virtio_writefn, proxy); |
260 | sysbus_init_mmio(&proxy->busdev, 0x1000, iomemtype); | |
261 | ||
262 | proxy->id = ((uint32_t)0x1af4 << 16) | vdev->device_id; | |
263 | ||
a08d4367 | 264 | qemu_register_reset(virtio_reset, vdev); |
7055e687 | 265 | |
340d96e7 | 266 | virtio_bind_device(vdev, &syborg_virtio_bindings, proxy); |
81a322d4 | 267 | return 0; |
340d96e7 PB |
268 | } |
269 | ||
270 | /* Device specific bindings. */ | |
271 | ||
81a322d4 | 272 | static int syborg_virtio_net_init(SysBusDevice *dev) |
340d96e7 PB |
273 | { |
274 | VirtIODevice *vdev; | |
275 | SyborgVirtIOProxy *proxy = FROM_SYSBUS(SyborgVirtIOProxy, dev); | |
276 | ||
97b15621 | 277 | vdev = virtio_net_init(&dev->qdev, &proxy->nic); |
81a322d4 | 278 | return syborg_virtio_init(proxy, vdev); |
340d96e7 PB |
279 | } |
280 | ||
97b15621 GH |
281 | static SysBusDeviceInfo syborg_virtio_net_info = { |
282 | .init = syborg_virtio_net_init, | |
283 | .qdev.name = "syborg,virtio-net", | |
284 | .qdev.size = sizeof(SyborgVirtIOProxy), | |
285 | .qdev.props = (Property[]) { | |
286 | DEFINE_NIC_PROPERTIES(SyborgVirtIOProxy, nic), | |
287 | DEFINE_PROP_END_OF_LIST(), | |
288 | } | |
289 | }; | |
290 | ||
340d96e7 PB |
291 | static void syborg_virtio_register_devices(void) |
292 | { | |
97b15621 | 293 | sysbus_register_withprop(&syborg_virtio_net_info); |
340d96e7 PB |
294 | } |
295 | ||
296 | device_init(syborg_virtio_register_devices) |