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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; | |
68 | } SyborgVirtIOProxy; | |
69 | ||
70 | static uint32_t syborg_virtio_readl(void *opaque, target_phys_addr_t offset) | |
71 | { | |
72 | SyborgVirtIOProxy *s = opaque; | |
73 | VirtIODevice *vdev = s->vdev; | |
74 | uint32_t ret; | |
75 | ||
76 | DPRINTF("readl 0x%x\n", (int)offset); | |
77 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
78 | return virtio_config_readl(vdev, offset - SYBORG_VIRTIO_CONFIG); | |
79 | } | |
80 | switch(offset >> 2) { | |
81 | case SYBORG_VIRTIO_ID: | |
82 | ret = SYBORG_ID_VIRTIO; | |
83 | break; | |
84 | case SYBORG_VIRTIO_DEVTYPE: | |
85 | ret = s->id; | |
86 | break; | |
87 | case SYBORG_VIRTIO_HOST_FEATURES: | |
88 | ret = vdev->get_features(vdev); | |
89 | ret |= (1 << VIRTIO_F_NOTIFY_ON_EMPTY); | |
90 | break; | |
91 | case SYBORG_VIRTIO_GUEST_FEATURES: | |
92 | ret = vdev->features; | |
93 | break; | |
94 | case SYBORG_VIRTIO_QUEUE_BASE: | |
95 | ret = virtio_queue_get_addr(vdev, vdev->queue_sel); | |
96 | break; | |
97 | case SYBORG_VIRTIO_QUEUE_NUM: | |
98 | ret = virtio_queue_get_num(vdev, vdev->queue_sel); | |
99 | break; | |
100 | case SYBORG_VIRTIO_QUEUE_SEL: | |
101 | ret = vdev->queue_sel; | |
102 | break; | |
103 | case SYBORG_VIRTIO_STATUS: | |
104 | ret = vdev->status; | |
105 | break; | |
106 | case SYBORG_VIRTIO_INT_ENABLE: | |
107 | ret = s->int_enable; | |
108 | break; | |
109 | case SYBORG_VIRTIO_INT_STATUS: | |
110 | ret = vdev->isr; | |
111 | break; | |
112 | default: | |
113 | BADF("Bad read offset 0x%x\n", (int)offset); | |
114 | return 0; | |
115 | } | |
116 | return ret; | |
117 | } | |
118 | ||
119 | static void syborg_virtio_writel(void *opaque, target_phys_addr_t offset, | |
120 | uint32_t value) | |
121 | { | |
122 | SyborgVirtIOProxy *s = opaque; | |
123 | VirtIODevice *vdev = s->vdev; | |
124 | ||
125 | DPRINTF("writel 0x%x = 0x%x\n", (int)offset, value); | |
126 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
127 | return virtio_config_writel(vdev, offset - SYBORG_VIRTIO_CONFIG, | |
128 | value); | |
129 | } | |
130 | switch (offset >> 2) { | |
131 | case SYBORG_VIRTIO_GUEST_FEATURES: | |
132 | if (vdev->set_features) | |
133 | vdev->set_features(vdev, value); | |
134 | vdev->features = value; | |
135 | break; | |
136 | case SYBORG_VIRTIO_QUEUE_BASE: | |
137 | virtio_queue_set_addr(vdev, vdev->queue_sel, value); | |
138 | break; | |
139 | case SYBORG_VIRTIO_QUEUE_SEL: | |
140 | if (value < VIRTIO_PCI_QUEUE_MAX) | |
141 | vdev->queue_sel = value; | |
142 | break; | |
143 | case SYBORG_VIRTIO_QUEUE_NOTIFY: | |
144 | virtio_queue_notify(vdev, value); | |
145 | break; | |
146 | case SYBORG_VIRTIO_STATUS: | |
147 | vdev->status = value & 0xFF; | |
148 | if (vdev->status == 0) | |
149 | virtio_reset(vdev); | |
150 | break; | |
151 | case SYBORG_VIRTIO_INT_ENABLE: | |
152 | s->int_enable = value; | |
153 | virtio_update_irq(vdev); | |
154 | break; | |
155 | case SYBORG_VIRTIO_INT_STATUS: | |
156 | vdev->isr &= ~value; | |
157 | virtio_update_irq(vdev); | |
158 | break; | |
159 | default: | |
160 | BADF("Bad write offset 0x%x\n", (int)offset); | |
161 | break; | |
162 | } | |
163 | } | |
164 | ||
165 | static uint32_t syborg_virtio_readw(void *opaque, target_phys_addr_t offset) | |
166 | { | |
167 | SyborgVirtIOProxy *s = opaque; | |
168 | VirtIODevice *vdev = s->vdev; | |
169 | ||
170 | DPRINTF("readw 0x%x\n", (int)offset); | |
171 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
172 | return virtio_config_readw(vdev, offset - SYBORG_VIRTIO_CONFIG); | |
173 | } | |
174 | BADF("Bad halfword read offset 0x%x\n", (int)offset); | |
175 | return -1; | |
176 | } | |
177 | ||
178 | static void syborg_virtio_writew(void *opaque, target_phys_addr_t offset, | |
179 | uint32_t value) | |
180 | { | |
181 | SyborgVirtIOProxy *s = opaque; | |
182 | VirtIODevice *vdev = s->vdev; | |
183 | ||
184 | DPRINTF("writew 0x%x = 0x%x\n", (int)offset, value); | |
185 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
186 | return virtio_config_writew(vdev, offset - SYBORG_VIRTIO_CONFIG, | |
187 | value); | |
188 | } | |
189 | BADF("Bad halfword write offset 0x%x\n", (int)offset); | |
190 | } | |
191 | ||
192 | static uint32_t syborg_virtio_readb(void *opaque, target_phys_addr_t offset) | |
193 | { | |
194 | SyborgVirtIOProxy *s = opaque; | |
195 | VirtIODevice *vdev = s->vdev; | |
196 | ||
197 | DPRINTF("readb 0x%x\n", (int)offset); | |
198 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
199 | return virtio_config_readb(vdev, offset - SYBORG_VIRTIO_CONFIG); | |
200 | } | |
201 | BADF("Bad byte read offset 0x%x\n", (int)offset); | |
202 | return -1; | |
203 | } | |
204 | ||
205 | static void syborg_virtio_writeb(void *opaque, target_phys_addr_t offset, | |
206 | uint32_t value) | |
207 | { | |
208 | SyborgVirtIOProxy *s = opaque; | |
209 | VirtIODevice *vdev = s->vdev; | |
210 | ||
211 | DPRINTF("writeb 0x%x = 0x%x\n", (int)offset, value); | |
212 | if (offset >= SYBORG_VIRTIO_CONFIG) { | |
213 | return virtio_config_writeb(vdev, offset - SYBORG_VIRTIO_CONFIG, | |
214 | value); | |
215 | } | |
216 | BADF("Bad byte write offset 0x%x\n", (int)offset); | |
217 | } | |
218 | ||
219 | static CPUReadMemoryFunc *syborg_virtio_readfn[] = { | |
220 | syborg_virtio_readb, | |
221 | syborg_virtio_readw, | |
222 | syborg_virtio_readl | |
223 | }; | |
224 | ||
225 | static CPUWriteMemoryFunc *syborg_virtio_writefn[] = { | |
226 | syborg_virtio_writeb, | |
227 | syborg_virtio_writew, | |
228 | syborg_virtio_writel | |
229 | }; | |
230 | ||
231 | static void syborg_virtio_update_irq(void *opaque) | |
232 | { | |
233 | SyborgVirtIOProxy *proxy = opaque; | |
234 | int level; | |
235 | ||
236 | level = proxy->int_enable & proxy->vdev->isr; | |
237 | DPRINTF("IRQ %d\n", level); | |
238 | qemu_set_irq(proxy->irq, level != 0); | |
239 | } | |
240 | ||
241 | static VirtIOBindings syborg_virtio_bindings = { | |
242 | .update_irq = syborg_virtio_update_irq | |
243 | }; | |
244 | ||
245 | static void syborg_virtio_init(SyborgVirtIOProxy *proxy, VirtIODevice *vdev) | |
246 | { | |
247 | int iomemtype; | |
248 | ||
249 | proxy->vdev = vdev; | |
250 | ||
251 | sysbus_init_irq(&proxy->busdev, &proxy->irq); | |
1eed09cb | 252 | iomemtype = cpu_register_io_memory(syborg_virtio_readfn, |
340d96e7 PB |
253 | syborg_virtio_writefn, proxy); |
254 | sysbus_init_mmio(&proxy->busdev, 0x1000, iomemtype); | |
255 | ||
256 | proxy->id = ((uint32_t)0x1af4 << 16) | vdev->device_id; | |
257 | ||
258 | virtio_bind_device(vdev, &syborg_virtio_bindings, proxy); | |
259 | } | |
260 | ||
261 | /* Device specific bindings. */ | |
262 | ||
263 | static void syborg_virtio_net_init(SysBusDevice *dev) | |
264 | { | |
265 | VirtIODevice *vdev; | |
266 | SyborgVirtIOProxy *proxy = FROM_SYSBUS(SyborgVirtIOProxy, dev); | |
267 | ||
268 | vdev = virtio_net_init(&dev->qdev); | |
269 | syborg_virtio_init(proxy, vdev); | |
270 | } | |
271 | ||
272 | static void syborg_virtio_register_devices(void) | |
273 | { | |
274 | sysbus_register_dev("syborg,virtio-net", sizeof(SyborgVirtIOProxy), | |
275 | syborg_virtio_net_init); | |
276 | } | |
277 | ||
278 | device_init(syborg_virtio_register_devices) |