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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"
8172539d 28#include "virtio-net.h"
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29
30//#define DEBUG_SYBORG_VIRTIO
31
32#ifdef DEBUG_SYBORG_VIRTIO
33#define DPRINTF(fmt, ...) \
34do { printf("syborg_virtio: " fmt , ## __VA_ARGS__); } while (0)
35#define BADF(fmt, ...) \
36do { 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, ...) \
41do { fprintf(stderr, "syborg_virtio: error: " fmt , ## __VA_ARGS__);} while (0)
42#endif
43
44enum {
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
62typedef struct {
63 SysBusDevice busdev;
64 VirtIODevice *vdev;
65 qemu_irq irq;
66 uint32_t int_enable;
67 uint32_t id;
97b15621 68 NICConf nic;
8172539d 69 uint32_t host_features;
f0c07c7c 70 virtio_net_conf net;
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71} SyborgVirtIOProxy;
72
c227f099 73static uint32_t syborg_virtio_readl(void *opaque, target_phys_addr_t offset)
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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:
8172539d 91 ret = s->host_features;
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92 break;
93 case SYBORG_VIRTIO_GUEST_FEATURES:
704a76fc 94 ret = vdev->guest_features;
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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
c227f099 121static void syborg_virtio_writel(void *opaque, target_phys_addr_t offset,
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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);
704a76fc 136 vdev->guest_features = value;
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137 break;
138 case SYBORG_VIRTIO_QUEUE_BASE:
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MT
139 if (value == 0)
140 virtio_reset(vdev);
141 else
142 virtio_queue_set_addr(vdev, vdev->queue_sel, value);
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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 virtio_queue_notify(vdev, value);
150 break;
151 case SYBORG_VIRTIO_STATUS:
3e607cb5 152 virtio_set_status(vdev, value & 0xFF);
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153 if (vdev->status == 0)
154 virtio_reset(vdev);
155 break;
156 case SYBORG_VIRTIO_INT_ENABLE:
157 s->int_enable = value;
158 virtio_update_irq(vdev);
159 break;
160 case SYBORG_VIRTIO_INT_STATUS:
161 vdev->isr &= ~value;
162 virtio_update_irq(vdev);
163 break;
164 default:
165 BADF("Bad write offset 0x%x\n", (int)offset);
166 break;
167 }
168}
169
c227f099 170static uint32_t syborg_virtio_readw(void *opaque, target_phys_addr_t offset)
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171{
172 SyborgVirtIOProxy *s = opaque;
173 VirtIODevice *vdev = s->vdev;
174
175 DPRINTF("readw 0x%x\n", (int)offset);
176 if (offset >= SYBORG_VIRTIO_CONFIG) {
177 return virtio_config_readw(vdev, offset - SYBORG_VIRTIO_CONFIG);
178 }
179 BADF("Bad halfword read offset 0x%x\n", (int)offset);
180 return -1;
181}
182
c227f099 183static void syborg_virtio_writew(void *opaque, target_phys_addr_t offset,
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184 uint32_t value)
185{
186 SyborgVirtIOProxy *s = opaque;
187 VirtIODevice *vdev = s->vdev;
188
189 DPRINTF("writew 0x%x = 0x%x\n", (int)offset, value);
190 if (offset >= SYBORG_VIRTIO_CONFIG) {
191 return virtio_config_writew(vdev, offset - SYBORG_VIRTIO_CONFIG,
192 value);
193 }
194 BADF("Bad halfword write offset 0x%x\n", (int)offset);
195}
196
c227f099 197static uint32_t syborg_virtio_readb(void *opaque, target_phys_addr_t offset)
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198{
199 SyborgVirtIOProxy *s = opaque;
200 VirtIODevice *vdev = s->vdev;
201
202 DPRINTF("readb 0x%x\n", (int)offset);
203 if (offset >= SYBORG_VIRTIO_CONFIG) {
204 return virtio_config_readb(vdev, offset - SYBORG_VIRTIO_CONFIG);
205 }
206 BADF("Bad byte read offset 0x%x\n", (int)offset);
207 return -1;
208}
209
c227f099 210static void syborg_virtio_writeb(void *opaque, target_phys_addr_t offset,
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211 uint32_t value)
212{
213 SyborgVirtIOProxy *s = opaque;
214 VirtIODevice *vdev = s->vdev;
215
216 DPRINTF("writeb 0x%x = 0x%x\n", (int)offset, value);
217 if (offset >= SYBORG_VIRTIO_CONFIG) {
218 return virtio_config_writeb(vdev, offset - SYBORG_VIRTIO_CONFIG,
219 value);
220 }
221 BADF("Bad byte write offset 0x%x\n", (int)offset);
222}
223
d60efc6b 224static CPUReadMemoryFunc * const syborg_virtio_readfn[] = {
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225 syborg_virtio_readb,
226 syborg_virtio_readw,
227 syborg_virtio_readl
228};
229
d60efc6b 230static CPUWriteMemoryFunc * const syborg_virtio_writefn[] = {
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231 syborg_virtio_writeb,
232 syborg_virtio_writew,
233 syborg_virtio_writel
234};
235
7055e687 236static void syborg_virtio_update_irq(void *opaque, uint16_t vector)
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237{
238 SyborgVirtIOProxy *proxy = opaque;
239 int level;
240
241 level = proxy->int_enable & proxy->vdev->isr;
242 DPRINTF("IRQ %d\n", level);
243 qemu_set_irq(proxy->irq, level != 0);
244}
245
6d74ca5a
MT
246static unsigned syborg_virtio_get_features(void *opaque)
247{
8172539d
MT
248 SyborgVirtIOProxy *proxy = opaque;
249 return proxy->host_features;
6d74ca5a
MT
250}
251
340d96e7 252static VirtIOBindings syborg_virtio_bindings = {
6d74ca5a
MT
253 .notify = syborg_virtio_update_irq,
254 .get_features = syborg_virtio_get_features,
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255};
256
81a322d4 257static int syborg_virtio_init(SyborgVirtIOProxy *proxy, VirtIODevice *vdev)
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258{
259 int iomemtype;
260
261 proxy->vdev = vdev;
262
7055e687
MT
263 /* Don't support multiple vectors */
264 proxy->vdev->nvectors = 0;
340d96e7 265 sysbus_init_irq(&proxy->busdev, &proxy->irq);
1eed09cb 266 iomemtype = cpu_register_io_memory(syborg_virtio_readfn,
2507c12a
AG
267 syborg_virtio_writefn, proxy,
268 DEVICE_NATIVE_ENDIAN);
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269 sysbus_init_mmio(&proxy->busdev, 0x1000, iomemtype);
270
271 proxy->id = ((uint32_t)0x1af4 << 16) | vdev->device_id;
272
a08d4367 273 qemu_register_reset(virtio_reset, vdev);
7055e687 274
340d96e7 275 virtio_bind_device(vdev, &syborg_virtio_bindings, proxy);
8172539d
MT
276 proxy->host_features |= (0x1 << VIRTIO_F_NOTIFY_ON_EMPTY);
277 proxy->host_features = vdev->get_features(vdev, proxy->host_features);
81a322d4 278 return 0;
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279}
280
281/* Device specific bindings. */
282
81a322d4 283static int syborg_virtio_net_init(SysBusDevice *dev)
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284{
285 VirtIODevice *vdev;
286 SyborgVirtIOProxy *proxy = FROM_SYSBUS(SyborgVirtIOProxy, dev);
287
f0c07c7c 288 vdev = virtio_net_init(&dev->qdev, &proxy->nic, &proxy->net);
81a322d4 289 return syborg_virtio_init(proxy, vdev);
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290}
291
97b15621
GH
292static SysBusDeviceInfo syborg_virtio_net_info = {
293 .init = syborg_virtio_net_init,
294 .qdev.name = "syborg,virtio-net",
295 .qdev.size = sizeof(SyborgVirtIOProxy),
296 .qdev.props = (Property[]) {
297 DEFINE_NIC_PROPERTIES(SyborgVirtIOProxy, nic),
8172539d 298 DEFINE_VIRTIO_NET_FEATURES(SyborgVirtIOProxy, host_features),
f0c07c7c
AW
299 DEFINE_PROP_UINT32("x-txtimer", SyborgVirtIOProxy,
300 net.txtimer, TX_TIMER_INTERVAL),
e3f30488
AW
301 DEFINE_PROP_INT32("x-txburst", SyborgVirtIOProxy,
302 net.txburst, TX_BURST),
a697a334 303 DEFINE_PROP_STRING("tx", SyborgVirtIOProxy, net.tx),
97b15621
GH
304 DEFINE_PROP_END_OF_LIST(),
305 }
306};
307
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308static void syborg_virtio_register_devices(void)
309{
97b15621 310 sysbus_register_withprop(&syborg_virtio_net_info);
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311}
312
313device_init(syborg_virtio_register_devices)