Paul Brook | 340d96e | 2009-05-18 16:45:48 +0100 | [diff] [blame] | 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); |
| 252 | iomemtype = cpu_register_io_memory(0, syborg_virtio_readfn, |
| 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) |