]>
Commit | Line | Data |
---|---|---|
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 "virtio-net.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; | |
68 | NICConf nic; | |
69 | uint32_t host_features; | |
70 | virtio_net_conf net; | |
71 | } SyborgVirtIOProxy; | |
72 | ||
73 | static uint32_t syborg_virtio_readl(void *opaque, target_phys_addr_t offset) | |
74 | { | |
75 | SyborgVirtIOProxy *s = opaque; | |
76 | VirtIODevice *vdev = s->vdev; | |
77 | uint32_t ret; | |
78 | ||
79 | DPRINTF("readl 0x%x\n", (int)offset); | |
80 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
81 | return virtio_config_readl(vdev, offset - SYBORG_VIRTIO_CONFIG); | |
82 | } | |
83 | switch(offset >> 2) { | |
84 | case SYBORG_VIRTIO_ID: | |
85 | ret = SYBORG_ID_VIRTIO; | |
86 | break; | |
87 | case SYBORG_VIRTIO_DEVTYPE: | |
88 | ret = s->id; | |
89 | break; | |
90 | case SYBORG_VIRTIO_HOST_FEATURES: | |
91 | ret = s->host_features; | |
92 | break; | |
93 | case SYBORG_VIRTIO_GUEST_FEATURES: | |
94 | ret = vdev->guest_features; | |
95 | break; | |
96 | case SYBORG_VIRTIO_QUEUE_BASE: | |
97 | ret = virtio_queue_get_addr(vdev, vdev->queue_sel); | |
98 | break; | |
99 | case SYBORG_VIRTIO_QUEUE_NUM: | |
100 | ret = virtio_queue_get_num(vdev, vdev->queue_sel); | |
101 | break; | |
102 | case SYBORG_VIRTIO_QUEUE_SEL: | |
103 | ret = vdev->queue_sel; | |
104 | break; | |
105 | case SYBORG_VIRTIO_STATUS: | |
106 | ret = vdev->status; | |
107 | break; | |
108 | case SYBORG_VIRTIO_INT_ENABLE: | |
109 | ret = s->int_enable; | |
110 | break; | |
111 | case SYBORG_VIRTIO_INT_STATUS: | |
112 | ret = vdev->isr; | |
113 | break; | |
114 | default: | |
115 | BADF("Bad read offset 0x%x\n", (int)offset); | |
116 | return 0; | |
117 | } | |
118 | return ret; | |
119 | } | |
120 | ||
121 | static void syborg_virtio_writel(void *opaque, target_phys_addr_t offset, | |
122 | uint32_t value) | |
123 | { | |
124 | SyborgVirtIOProxy *s = opaque; | |
125 | VirtIODevice *vdev = s->vdev; | |
126 | ||
127 | DPRINTF("writel 0x%x = 0x%x\n", (int)offset, value); | |
128 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
129 | return virtio_config_writel(vdev, offset - SYBORG_VIRTIO_CONFIG, | |
130 | value); | |
131 | } | |
132 | switch (offset >> 2) { | |
133 | case SYBORG_VIRTIO_GUEST_FEATURES: | |
134 | if (vdev->set_features) | |
135 | vdev->set_features(vdev, value); | |
136 | vdev->guest_features = value; | |
137 | break; | |
138 | case SYBORG_VIRTIO_QUEUE_BASE: | |
139 | if (value == 0) | |
140 | virtio_reset(vdev); | |
141 | else | |
142 | virtio_queue_set_addr(vdev, vdev->queue_sel, value); | |
143 | break; | |
144 | case SYBORG_VIRTIO_QUEUE_SEL: | |
145 | if (value < VIRTIO_PCI_QUEUE_MAX) | |
146 | vdev->queue_sel = value; | |
147 | break; | |
148 | case SYBORG_VIRTIO_QUEUE_NOTIFY: | |
149 | if (value < VIRTIO_PCI_QUEUE_MAX) { | |
150 | virtio_queue_notify(vdev, value); | |
151 | } | |
152 | break; | |
153 | case SYBORG_VIRTIO_STATUS: | |
154 | virtio_set_status(vdev, value & 0xFF); | |
155 | if (vdev->status == 0) | |
156 | virtio_reset(vdev); | |
157 | break; | |
158 | case SYBORG_VIRTIO_INT_ENABLE: | |
159 | s->int_enable = value; | |
160 | virtio_update_irq(vdev); | |
161 | break; | |
162 | case SYBORG_VIRTIO_INT_STATUS: | |
163 | vdev->isr &= ~value; | |
164 | virtio_update_irq(vdev); | |
165 | break; | |
166 | default: | |
167 | BADF("Bad write offset 0x%x\n", (int)offset); | |
168 | break; | |
169 | } | |
170 | } | |
171 | ||
172 | static uint32_t syborg_virtio_readw(void *opaque, target_phys_addr_t offset) | |
173 | { | |
174 | SyborgVirtIOProxy *s = opaque; | |
175 | VirtIODevice *vdev = s->vdev; | |
176 | ||
177 | DPRINTF("readw 0x%x\n", (int)offset); | |
178 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
179 | return virtio_config_readw(vdev, offset - SYBORG_VIRTIO_CONFIG); | |
180 | } | |
181 | BADF("Bad halfword read offset 0x%x\n", (int)offset); | |
182 | return -1; | |
183 | } | |
184 | ||
185 | static void syborg_virtio_writew(void *opaque, target_phys_addr_t offset, | |
186 | uint32_t value) | |
187 | { | |
188 | SyborgVirtIOProxy *s = opaque; | |
189 | VirtIODevice *vdev = s->vdev; | |
190 | ||
191 | DPRINTF("writew 0x%x = 0x%x\n", (int)offset, value); | |
192 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
193 | return virtio_config_writew(vdev, offset - SYBORG_VIRTIO_CONFIG, | |
194 | value); | |
195 | } | |
196 | BADF("Bad halfword write offset 0x%x\n", (int)offset); | |
197 | } | |
198 | ||
199 | static uint32_t syborg_virtio_readb(void *opaque, target_phys_addr_t offset) | |
200 | { | |
201 | SyborgVirtIOProxy *s = opaque; | |
202 | VirtIODevice *vdev = s->vdev; | |
203 | ||
204 | DPRINTF("readb 0x%x\n", (int)offset); | |
205 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
206 | return virtio_config_readb(vdev, offset - SYBORG_VIRTIO_CONFIG); | |
207 | } | |
208 | BADF("Bad byte read offset 0x%x\n", (int)offset); | |
209 | return -1; | |
210 | } | |
211 | ||
212 | static void syborg_virtio_writeb(void *opaque, target_phys_addr_t offset, | |
213 | uint32_t value) | |
214 | { | |
215 | SyborgVirtIOProxy *s = opaque; | |
216 | VirtIODevice *vdev = s->vdev; | |
217 | ||
218 | DPRINTF("writeb 0x%x = 0x%x\n", (int)offset, value); | |
219 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
220 | return virtio_config_writeb(vdev, offset - SYBORG_VIRTIO_CONFIG, | |
221 | value); | |
222 | } | |
223 | BADF("Bad byte write offset 0x%x\n", (int)offset); | |
224 | } | |
225 | ||
226 | static CPUReadMemoryFunc * const syborg_virtio_readfn[] = { | |
227 | syborg_virtio_readb, | |
228 | syborg_virtio_readw, | |
229 | syborg_virtio_readl | |
230 | }; | |
231 | ||
232 | static CPUWriteMemoryFunc * const syborg_virtio_writefn[] = { | |
233 | syborg_virtio_writeb, | |
234 | syborg_virtio_writew, | |
235 | syborg_virtio_writel | |
236 | }; | |
237 | ||
238 | static void syborg_virtio_update_irq(void *opaque, uint16_t vector) | |
239 | { | |
240 | SyborgVirtIOProxy *proxy = opaque; | |
241 | int level; | |
242 | ||
243 | level = proxy->int_enable & proxy->vdev->isr; | |
244 | DPRINTF("IRQ %d\n", level); | |
245 | qemu_set_irq(proxy->irq, level != 0); | |
246 | } | |
247 | ||
248 | static unsigned syborg_virtio_get_features(void *opaque) | |
249 | { | |
250 | SyborgVirtIOProxy *proxy = opaque; | |
251 | return proxy->host_features; | |
252 | } | |
253 | ||
254 | static VirtIOBindings syborg_virtio_bindings = { | |
255 | .notify = syborg_virtio_update_irq, | |
256 | .get_features = syborg_virtio_get_features, | |
257 | }; | |
258 | ||
259 | static int syborg_virtio_init(SyborgVirtIOProxy *proxy, VirtIODevice *vdev) | |
260 | { | |
261 | int iomemtype; | |
262 | ||
263 | proxy->vdev = vdev; | |
264 | ||
265 | /* Don't support multiple vectors */ | |
266 | proxy->vdev->nvectors = 0; | |
267 | sysbus_init_irq(&proxy->busdev, &proxy->irq); | |
268 | iomemtype = cpu_register_io_memory(syborg_virtio_readfn, | |
269 | syborg_virtio_writefn, proxy, | |
270 | DEVICE_NATIVE_ENDIAN); | |
271 | sysbus_init_mmio(&proxy->busdev, 0x1000, iomemtype); | |
272 | ||
273 | proxy->id = ((uint32_t)0x1af4 << 16) | vdev->device_id; | |
274 | ||
275 | qemu_register_reset(virtio_reset, vdev); | |
276 | ||
277 | virtio_bind_device(vdev, &syborg_virtio_bindings, proxy); | |
278 | proxy->host_features |= (0x1 << VIRTIO_F_NOTIFY_ON_EMPTY); | |
279 | proxy->host_features = vdev->get_features(vdev, proxy->host_features); | |
280 | return 0; | |
281 | } | |
282 | ||
283 | /* Device specific bindings. */ | |
284 | ||
285 | static int syborg_virtio_net_init(SysBusDevice *dev) | |
286 | { | |
287 | VirtIODevice *vdev; | |
288 | SyborgVirtIOProxy *proxy = FROM_SYSBUS(SyborgVirtIOProxy, dev); | |
289 | ||
290 | vdev = virtio_net_init(&dev->qdev, &proxy->nic, &proxy->net); | |
291 | return syborg_virtio_init(proxy, vdev); | |
292 | } | |
293 | ||
294 | static SysBusDeviceInfo syborg_virtio_net_info = { | |
295 | .init = syborg_virtio_net_init, | |
296 | .qdev.name = "syborg,virtio-net", | |
297 | .qdev.size = sizeof(SyborgVirtIOProxy), | |
298 | .qdev.props = (Property[]) { | |
299 | DEFINE_NIC_PROPERTIES(SyborgVirtIOProxy, nic), | |
300 | DEFINE_VIRTIO_NET_FEATURES(SyborgVirtIOProxy, host_features), | |
301 | DEFINE_PROP_UINT32("x-txtimer", SyborgVirtIOProxy, | |
302 | net.txtimer, TX_TIMER_INTERVAL), | |
303 | DEFINE_PROP_INT32("x-txburst", SyborgVirtIOProxy, | |
304 | net.txburst, TX_BURST), | |
305 | DEFINE_PROP_STRING("tx", SyborgVirtIOProxy, net.tx), | |
306 | DEFINE_PROP_END_OF_LIST(), | |
307 | } | |
308 | }; | |
309 | ||
310 | static void syborg_virtio_register_devices(void) | |
311 | { | |
312 | sysbus_register_withprop(&syborg_virtio_net_info); | |
313 | } | |
314 | ||
315 | device_init(syborg_virtio_register_devices) |