root / hw / syborg_virtio.c @ 57a46d05
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1 | 340d96e7 | Paul Brook | /*
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2 | 340d96e7 | Paul Brook | * Virtio Syborg bindings
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3 | 340d96e7 | Paul Brook | *
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4 | 340d96e7 | Paul Brook | * Copyright (c) 2009 CodeSourcery
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5 | 340d96e7 | Paul Brook | *
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6 | 340d96e7 | Paul Brook | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | 340d96e7 | Paul Brook | * of this software and associated documentation files (the "Software"), to deal
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8 | 340d96e7 | Paul Brook | * in the Software without restriction, including without limitation the rights
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9 | 340d96e7 | Paul Brook | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | 340d96e7 | Paul Brook | * copies of the Software, and to permit persons to whom the Software is
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11 | 340d96e7 | Paul Brook | * furnished to do so, subject to the following conditions:
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12 | 340d96e7 | Paul Brook | *
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13 | 340d96e7 | Paul Brook | * The above copyright notice and this permission notice shall be included in
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14 | 340d96e7 | Paul Brook | * all copies or substantial portions of the Software.
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15 | 340d96e7 | Paul Brook | *
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16 | 340d96e7 | Paul Brook | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | 340d96e7 | Paul Brook | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | 340d96e7 | Paul Brook | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | 340d96e7 | Paul Brook | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | 340d96e7 | Paul Brook | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | 340d96e7 | Paul Brook | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | 340d96e7 | Paul Brook | * THE SOFTWARE.
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23 | 340d96e7 | Paul Brook | */
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24 | 340d96e7 | Paul Brook | |
25 | 340d96e7 | Paul Brook | #include "syborg.h" |
26 | 340d96e7 | Paul Brook | #include "sysbus.h" |
27 | 340d96e7 | Paul Brook | #include "virtio.h" |
28 | 340d96e7 | Paul Brook | #include "sysemu.h" |
29 | 340d96e7 | Paul Brook | |
30 | 340d96e7 | Paul Brook | //#define DEBUG_SYBORG_VIRTIO
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31 | 340d96e7 | Paul Brook | |
32 | 340d96e7 | Paul Brook | #ifdef DEBUG_SYBORG_VIRTIO
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33 | 340d96e7 | Paul Brook | #define DPRINTF(fmt, ...) \
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34 | 340d96e7 | Paul Brook | do { printf("syborg_virtio: " fmt , ## __VA_ARGS__); } while (0) |
35 | 340d96e7 | Paul Brook | #define BADF(fmt, ...) \
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36 | 340d96e7 | Paul Brook | do { fprintf(stderr, "syborg_virtio: error: " fmt , ## __VA_ARGS__); \ |
37 | 340d96e7 | Paul Brook | exit(1);} while (0) |
38 | 340d96e7 | Paul Brook | #else
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39 | 340d96e7 | Paul Brook | #define DPRINTF(fmt, ...) do {} while(0) |
40 | 340d96e7 | Paul Brook | #define BADF(fmt, ...) \
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41 | 340d96e7 | Paul Brook | do { fprintf(stderr, "syborg_virtio: error: " fmt , ## __VA_ARGS__);} while (0) |
42 | 340d96e7 | Paul Brook | #endif
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43 | 340d96e7 | Paul Brook | |
44 | 340d96e7 | Paul Brook | enum {
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45 | 340d96e7 | Paul Brook | SYBORG_VIRTIO_ID = 0,
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46 | 340d96e7 | Paul Brook | SYBORG_VIRTIO_DEVTYPE = 1,
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47 | 340d96e7 | Paul Brook | SYBORG_VIRTIO_HOST_FEATURES = 2,
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48 | 340d96e7 | Paul Brook | SYBORG_VIRTIO_GUEST_FEATURES = 3,
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49 | 340d96e7 | Paul Brook | SYBORG_VIRTIO_QUEUE_BASE = 4,
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50 | 340d96e7 | Paul Brook | SYBORG_VIRTIO_QUEUE_NUM = 5,
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51 | 340d96e7 | Paul Brook | SYBORG_VIRTIO_QUEUE_SEL = 6,
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52 | 340d96e7 | Paul Brook | SYBORG_VIRTIO_QUEUE_NOTIFY = 7,
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53 | 340d96e7 | Paul Brook | SYBORG_VIRTIO_STATUS = 8,
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54 | 340d96e7 | Paul Brook | SYBORG_VIRTIO_INT_ENABLE = 9,
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55 | 340d96e7 | Paul Brook | SYBORG_VIRTIO_INT_STATUS = 10
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56 | 340d96e7 | Paul Brook | }; |
57 | 340d96e7 | Paul Brook | |
58 | 340d96e7 | Paul Brook | #define SYBORG_VIRTIO_CONFIG 0x100 |
59 | 340d96e7 | Paul Brook | |
60 | 340d96e7 | Paul Brook | /* Device independent interface. */
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61 | 340d96e7 | Paul Brook | |
62 | 340d96e7 | Paul Brook | typedef struct { |
63 | 340d96e7 | Paul Brook | SysBusDevice busdev; |
64 | 340d96e7 | Paul Brook | VirtIODevice *vdev; |
65 | 340d96e7 | Paul Brook | qemu_irq irq; |
66 | 340d96e7 | Paul Brook | uint32_t int_enable; |
67 | 340d96e7 | Paul Brook | uint32_t id; |
68 | 97b15621 | Gerd Hoffmann | NICConf nic; |
69 | 340d96e7 | Paul Brook | } SyborgVirtIOProxy; |
70 | 340d96e7 | Paul Brook | |
71 | c227f099 | Anthony Liguori | static uint32_t syborg_virtio_readl(void *opaque, target_phys_addr_t offset) |
72 | 340d96e7 | Paul Brook | { |
73 | 340d96e7 | Paul Brook | SyborgVirtIOProxy *s = opaque; |
74 | 340d96e7 | Paul Brook | VirtIODevice *vdev = s->vdev; |
75 | 340d96e7 | Paul Brook | uint32_t ret; |
76 | 340d96e7 | Paul Brook | |
77 | 340d96e7 | Paul Brook | DPRINTF("readl 0x%x\n", (int)offset); |
78 | 340d96e7 | Paul Brook | if (offset >= SYBORG_VIRTIO_CONFIG) {
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79 | 340d96e7 | Paul Brook | return virtio_config_readl(vdev, offset - SYBORG_VIRTIO_CONFIG);
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80 | 340d96e7 | Paul Brook | } |
81 | 340d96e7 | Paul Brook | switch(offset >> 2) { |
82 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_ID:
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83 | 340d96e7 | Paul Brook | ret = SYBORG_ID_VIRTIO; |
84 | 340d96e7 | Paul Brook | break;
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85 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_DEVTYPE:
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86 | 340d96e7 | Paul Brook | ret = s->id; |
87 | 340d96e7 | Paul Brook | break;
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88 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_HOST_FEATURES:
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89 | 340d96e7 | Paul Brook | ret = vdev->get_features(vdev); |
90 | 340d96e7 | Paul Brook | ret |= (1 << VIRTIO_F_NOTIFY_ON_EMPTY);
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91 | 340d96e7 | Paul Brook | break;
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92 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_GUEST_FEATURES:
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93 | 340d96e7 | Paul Brook | ret = vdev->features; |
94 | 340d96e7 | Paul Brook | break;
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95 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_QUEUE_BASE:
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96 | 340d96e7 | Paul Brook | ret = virtio_queue_get_addr(vdev, vdev->queue_sel); |
97 | 340d96e7 | Paul Brook | break;
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98 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_QUEUE_NUM:
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99 | 340d96e7 | Paul Brook | ret = virtio_queue_get_num(vdev, vdev->queue_sel); |
100 | 340d96e7 | Paul Brook | break;
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101 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_QUEUE_SEL:
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102 | 340d96e7 | Paul Brook | ret = vdev->queue_sel; |
103 | 340d96e7 | Paul Brook | break;
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104 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_STATUS:
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105 | 340d96e7 | Paul Brook | ret = vdev->status; |
106 | 340d96e7 | Paul Brook | break;
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107 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_INT_ENABLE:
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108 | 340d96e7 | Paul Brook | ret = s->int_enable; |
109 | 340d96e7 | Paul Brook | break;
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110 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_INT_STATUS:
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111 | 340d96e7 | Paul Brook | ret = vdev->isr; |
112 | 340d96e7 | Paul Brook | break;
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113 | 340d96e7 | Paul Brook | default:
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114 | 340d96e7 | Paul Brook | BADF("Bad read offset 0x%x\n", (int)offset); |
115 | 340d96e7 | Paul Brook | return 0; |
116 | 340d96e7 | Paul Brook | } |
117 | 340d96e7 | Paul Brook | return ret;
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118 | 340d96e7 | Paul Brook | } |
119 | 340d96e7 | Paul Brook | |
120 | c227f099 | Anthony Liguori | static void syborg_virtio_writel(void *opaque, target_phys_addr_t offset, |
121 | 340d96e7 | Paul Brook | uint32_t value) |
122 | 340d96e7 | Paul Brook | { |
123 | 340d96e7 | Paul Brook | SyborgVirtIOProxy *s = opaque; |
124 | 340d96e7 | Paul Brook | VirtIODevice *vdev = s->vdev; |
125 | 340d96e7 | Paul Brook | |
126 | 340d96e7 | Paul Brook | DPRINTF("writel 0x%x = 0x%x\n", (int)offset, value); |
127 | 340d96e7 | Paul Brook | if (offset >= SYBORG_VIRTIO_CONFIG) {
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128 | 340d96e7 | Paul Brook | return virtio_config_writel(vdev, offset - SYBORG_VIRTIO_CONFIG,
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129 | 340d96e7 | Paul Brook | value); |
130 | 340d96e7 | Paul Brook | } |
131 | 340d96e7 | Paul Brook | switch (offset >> 2) { |
132 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_GUEST_FEATURES:
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133 | 340d96e7 | Paul Brook | if (vdev->set_features)
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134 | 340d96e7 | Paul Brook | vdev->set_features(vdev, value); |
135 | 340d96e7 | Paul Brook | vdev->features = value; |
136 | 340d96e7 | Paul Brook | break;
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137 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_QUEUE_BASE:
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138 | 7055e687 | Michael S. Tsirkin | if (value == 0) |
139 | 7055e687 | Michael S. Tsirkin | virtio_reset(vdev); |
140 | 7055e687 | Michael S. Tsirkin | else
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141 | 7055e687 | Michael S. Tsirkin | virtio_queue_set_addr(vdev, vdev->queue_sel, value); |
142 | 340d96e7 | Paul Brook | break;
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143 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_QUEUE_SEL:
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144 | 340d96e7 | Paul Brook | if (value < VIRTIO_PCI_QUEUE_MAX)
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145 | 340d96e7 | Paul Brook | vdev->queue_sel = value; |
146 | 340d96e7 | Paul Brook | break;
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147 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_QUEUE_NOTIFY:
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148 | 340d96e7 | Paul Brook | virtio_queue_notify(vdev, value); |
149 | 340d96e7 | Paul Brook | break;
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150 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_STATUS:
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151 | 340d96e7 | Paul Brook | vdev->status = value & 0xFF;
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152 | 340d96e7 | Paul Brook | if (vdev->status == 0) |
153 | 340d96e7 | Paul Brook | virtio_reset(vdev); |
154 | 340d96e7 | Paul Brook | break;
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155 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_INT_ENABLE:
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156 | 340d96e7 | Paul Brook | s->int_enable = value; |
157 | 340d96e7 | Paul Brook | virtio_update_irq(vdev); |
158 | 340d96e7 | Paul Brook | break;
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159 | 340d96e7 | Paul Brook | case SYBORG_VIRTIO_INT_STATUS:
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160 | 340d96e7 | Paul Brook | vdev->isr &= ~value; |
161 | 340d96e7 | Paul Brook | virtio_update_irq(vdev); |
162 | 340d96e7 | Paul Brook | break;
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163 | 340d96e7 | Paul Brook | default:
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164 | 340d96e7 | Paul Brook | BADF("Bad write offset 0x%x\n", (int)offset); |
165 | 340d96e7 | Paul Brook | break;
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166 | 340d96e7 | Paul Brook | } |
167 | 340d96e7 | Paul Brook | } |
168 | 340d96e7 | Paul Brook | |
169 | c227f099 | Anthony Liguori | static uint32_t syborg_virtio_readw(void *opaque, target_phys_addr_t offset) |
170 | 340d96e7 | Paul Brook | { |
171 | 340d96e7 | Paul Brook | SyborgVirtIOProxy *s = opaque; |
172 | 340d96e7 | Paul Brook | VirtIODevice *vdev = s->vdev; |
173 | 340d96e7 | Paul Brook | |
174 | 340d96e7 | Paul Brook | DPRINTF("readw 0x%x\n", (int)offset); |
175 | 340d96e7 | Paul Brook | if (offset >= SYBORG_VIRTIO_CONFIG) {
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176 | 340d96e7 | Paul Brook | return virtio_config_readw(vdev, offset - SYBORG_VIRTIO_CONFIG);
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177 | 340d96e7 | Paul Brook | } |
178 | 340d96e7 | Paul Brook | BADF("Bad halfword read offset 0x%x\n", (int)offset); |
179 | 340d96e7 | Paul Brook | return -1; |
180 | 340d96e7 | Paul Brook | } |
181 | 340d96e7 | Paul Brook | |
182 | c227f099 | Anthony Liguori | static void syborg_virtio_writew(void *opaque, target_phys_addr_t offset, |
183 | 340d96e7 | Paul Brook | uint32_t value) |
184 | 340d96e7 | Paul Brook | { |
185 | 340d96e7 | Paul Brook | SyborgVirtIOProxy *s = opaque; |
186 | 340d96e7 | Paul Brook | VirtIODevice *vdev = s->vdev; |
187 | 340d96e7 | Paul Brook | |
188 | 340d96e7 | Paul Brook | DPRINTF("writew 0x%x = 0x%x\n", (int)offset, value); |
189 | 340d96e7 | Paul Brook | if (offset >= SYBORG_VIRTIO_CONFIG) {
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190 | 340d96e7 | Paul Brook | return virtio_config_writew(vdev, offset - SYBORG_VIRTIO_CONFIG,
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191 | 340d96e7 | Paul Brook | value); |
192 | 340d96e7 | Paul Brook | } |
193 | 340d96e7 | Paul Brook | BADF("Bad halfword write offset 0x%x\n", (int)offset); |
194 | 340d96e7 | Paul Brook | } |
195 | 340d96e7 | Paul Brook | |
196 | c227f099 | Anthony Liguori | static uint32_t syborg_virtio_readb(void *opaque, target_phys_addr_t offset) |
197 | 340d96e7 | Paul Brook | { |
198 | 340d96e7 | Paul Brook | SyborgVirtIOProxy *s = opaque; |
199 | 340d96e7 | Paul Brook | VirtIODevice *vdev = s->vdev; |
200 | 340d96e7 | Paul Brook | |
201 | 340d96e7 | Paul Brook | DPRINTF("readb 0x%x\n", (int)offset); |
202 | 340d96e7 | Paul Brook | if (offset >= SYBORG_VIRTIO_CONFIG) {
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203 | 340d96e7 | Paul Brook | return virtio_config_readb(vdev, offset - SYBORG_VIRTIO_CONFIG);
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204 | 340d96e7 | Paul Brook | } |
205 | 340d96e7 | Paul Brook | BADF("Bad byte read offset 0x%x\n", (int)offset); |
206 | 340d96e7 | Paul Brook | return -1; |
207 | 340d96e7 | Paul Brook | } |
208 | 340d96e7 | Paul Brook | |
209 | c227f099 | Anthony Liguori | static void syborg_virtio_writeb(void *opaque, target_phys_addr_t offset, |
210 | 340d96e7 | Paul Brook | uint32_t value) |
211 | 340d96e7 | Paul Brook | { |
212 | 340d96e7 | Paul Brook | SyborgVirtIOProxy *s = opaque; |
213 | 340d96e7 | Paul Brook | VirtIODevice *vdev = s->vdev; |
214 | 340d96e7 | Paul Brook | |
215 | 340d96e7 | Paul Brook | DPRINTF("writeb 0x%x = 0x%x\n", (int)offset, value); |
216 | 340d96e7 | Paul Brook | if (offset >= SYBORG_VIRTIO_CONFIG) {
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217 | 340d96e7 | Paul Brook | return virtio_config_writeb(vdev, offset - SYBORG_VIRTIO_CONFIG,
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218 | 340d96e7 | Paul Brook | value); |
219 | 340d96e7 | Paul Brook | } |
220 | 340d96e7 | Paul Brook | BADF("Bad byte write offset 0x%x\n", (int)offset); |
221 | 340d96e7 | Paul Brook | } |
222 | 340d96e7 | Paul Brook | |
223 | d60efc6b | Blue Swirl | static CPUReadMemoryFunc * const syborg_virtio_readfn[] = { |
224 | 340d96e7 | Paul Brook | syborg_virtio_readb, |
225 | 340d96e7 | Paul Brook | syborg_virtio_readw, |
226 | 340d96e7 | Paul Brook | syborg_virtio_readl |
227 | 340d96e7 | Paul Brook | }; |
228 | 340d96e7 | Paul Brook | |
229 | d60efc6b | Blue Swirl | static CPUWriteMemoryFunc * const syborg_virtio_writefn[] = { |
230 | 340d96e7 | Paul Brook | syborg_virtio_writeb, |
231 | 340d96e7 | Paul Brook | syborg_virtio_writew, |
232 | 340d96e7 | Paul Brook | syborg_virtio_writel |
233 | 340d96e7 | Paul Brook | }; |
234 | 340d96e7 | Paul Brook | |
235 | 7055e687 | Michael S. Tsirkin | static void syborg_virtio_update_irq(void *opaque, uint16_t vector) |
236 | 340d96e7 | Paul Brook | { |
237 | 340d96e7 | Paul Brook | SyborgVirtIOProxy *proxy = opaque; |
238 | 340d96e7 | Paul Brook | int level;
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239 | 340d96e7 | Paul Brook | |
240 | 340d96e7 | Paul Brook | level = proxy->int_enable & proxy->vdev->isr; |
241 | 340d96e7 | Paul Brook | DPRINTF("IRQ %d\n", level);
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242 | 340d96e7 | Paul Brook | qemu_set_irq(proxy->irq, level != 0);
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243 | 340d96e7 | Paul Brook | } |
244 | 340d96e7 | Paul Brook | |
245 | 340d96e7 | Paul Brook | static VirtIOBindings syborg_virtio_bindings = {
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246 | 7055e687 | Michael S. Tsirkin | .notify = syborg_virtio_update_irq |
247 | 340d96e7 | Paul Brook | }; |
248 | 340d96e7 | Paul Brook | |
249 | 81a322d4 | Gerd Hoffmann | static int syborg_virtio_init(SyborgVirtIOProxy *proxy, VirtIODevice *vdev) |
250 | 340d96e7 | Paul Brook | { |
251 | 340d96e7 | Paul Brook | int iomemtype;
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252 | 340d96e7 | Paul Brook | |
253 | 340d96e7 | Paul Brook | proxy->vdev = vdev; |
254 | 340d96e7 | Paul Brook | |
255 | 7055e687 | Michael S. Tsirkin | /* Don't support multiple vectors */
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256 | 7055e687 | Michael S. Tsirkin | proxy->vdev->nvectors = 0;
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257 | 340d96e7 | Paul Brook | sysbus_init_irq(&proxy->busdev, &proxy->irq); |
258 | 1eed09cb | Avi Kivity | iomemtype = cpu_register_io_memory(syborg_virtio_readfn, |
259 | 340d96e7 | Paul Brook | syborg_virtio_writefn, proxy); |
260 | 340d96e7 | Paul Brook | sysbus_init_mmio(&proxy->busdev, 0x1000, iomemtype);
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261 | 340d96e7 | Paul Brook | |
262 | 340d96e7 | Paul Brook | proxy->id = ((uint32_t)0x1af4 << 16) | vdev->device_id; |
263 | 340d96e7 | Paul Brook | |
264 | a08d4367 | Jan Kiszka | qemu_register_reset(virtio_reset, vdev); |
265 | 7055e687 | Michael S. Tsirkin | |
266 | 340d96e7 | Paul Brook | virtio_bind_device(vdev, &syborg_virtio_bindings, proxy); |
267 | 81a322d4 | Gerd Hoffmann | return 0; |
268 | 340d96e7 | Paul Brook | } |
269 | 340d96e7 | Paul Brook | |
270 | 340d96e7 | Paul Brook | /* Device specific bindings. */
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271 | 340d96e7 | Paul Brook | |
272 | 81a322d4 | Gerd Hoffmann | static int syborg_virtio_net_init(SysBusDevice *dev) |
273 | 340d96e7 | Paul Brook | { |
274 | 340d96e7 | Paul Brook | VirtIODevice *vdev; |
275 | 340d96e7 | Paul Brook | SyborgVirtIOProxy *proxy = FROM_SYSBUS(SyborgVirtIOProxy, dev); |
276 | 340d96e7 | Paul Brook | |
277 | 97b15621 | Gerd Hoffmann | vdev = virtio_net_init(&dev->qdev, &proxy->nic); |
278 | 81a322d4 | Gerd Hoffmann | return syborg_virtio_init(proxy, vdev);
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279 | 340d96e7 | Paul Brook | } |
280 | 340d96e7 | Paul Brook | |
281 | 97b15621 | Gerd Hoffmann | static SysBusDeviceInfo syborg_virtio_net_info = {
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282 | 97b15621 | Gerd Hoffmann | .init = syborg_virtio_net_init, |
283 | 97b15621 | Gerd Hoffmann | .qdev.name = "syborg,virtio-net",
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284 | 97b15621 | Gerd Hoffmann | .qdev.size = sizeof(SyborgVirtIOProxy),
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285 | 97b15621 | Gerd Hoffmann | .qdev.props = (Property[]) { |
286 | 97b15621 | Gerd Hoffmann | DEFINE_NIC_PROPERTIES(SyborgVirtIOProxy, nic), |
287 | 97b15621 | Gerd Hoffmann | DEFINE_PROP_END_OF_LIST(), |
288 | 97b15621 | Gerd Hoffmann | } |
289 | 97b15621 | Gerd Hoffmann | }; |
290 | 97b15621 | Gerd Hoffmann | |
291 | 340d96e7 | Paul Brook | static void syborg_virtio_register_devices(void) |
292 | 340d96e7 | Paul Brook | { |
293 | 97b15621 | Gerd Hoffmann | sysbus_register_withprop(&syborg_virtio_net_info); |
294 | 340d96e7 | Paul Brook | } |
295 | 340d96e7 | Paul Brook | |
296 | 340d96e7 | Paul Brook | device_init(syborg_virtio_register_devices) |