1 /* 2 * QEMU AMD PC-Net II (Am79C970A) PCI emulation 3 * 4 * Copyright (c) 2004 Antony T Curtis 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 /* This software was written to be compatible with the specification: 26 * AMD Am79C970A PCnet-PCI II Ethernet Controller Data-Sheet 27 * AMD Publication# 19436 Rev:E Amendment/0 Issue Date: June 2000 28 */ 29 30 #include "hw/pci/pci.h" 31 #include "net/net.h" 32 #include "hw/loader.h" 33 #include "qemu/timer.h" 34 #include "sysemu/dma.h" 35 #include "sysemu/sysemu.h" 36 #include "trace.h" 37 38 #include "pcnet.h" 39 40 //#define PCNET_DEBUG 41 //#define PCNET_DEBUG_IO 42 //#define PCNET_DEBUG_BCR 43 //#define PCNET_DEBUG_CSR 44 //#define PCNET_DEBUG_RMD 45 //#define PCNET_DEBUG_TMD 46 //#define PCNET_DEBUG_MATCH 47 48 #define TYPE_PCI_PCNET "pcnet" 49 50 #define PCI_PCNET(obj) \ 51 OBJECT_CHECK(PCIPCNetState, (obj), TYPE_PCI_PCNET) 52 53 typedef struct { 54 /*< private >*/ 55 PCIDevice parent_obj; 56 /*< public >*/ 57 58 PCNetState state; 59 MemoryRegion io_bar; 60 } PCIPCNetState; 61 62 static void pcnet_aprom_writeb(void *opaque, uint32_t addr, uint32_t val) 63 { 64 PCNetState *s = opaque; 65 66 trace_pcnet_aprom_writeb(opaque, addr, val); 67 if (BCR_APROMWE(s)) { 68 s->prom[addr & 15] = val; 69 } 70 } 71 72 static uint32_t pcnet_aprom_readb(void *opaque, uint32_t addr) 73 { 74 PCNetState *s = opaque; 75 uint32_t val = s->prom[addr & 15]; 76 77 trace_pcnet_aprom_readb(opaque, addr, val); 78 return val; 79 } 80 81 static uint64_t pcnet_ioport_read(void *opaque, hwaddr addr, 82 unsigned size) 83 { 84 PCNetState *d = opaque; 85 86 trace_pcnet_ioport_read(opaque, addr, size); 87 if (addr < 0x10) { 88 if (!BCR_DWIO(d) && size == 1) { 89 return pcnet_aprom_readb(d, addr); 90 } else if (!BCR_DWIO(d) && (addr & 1) == 0 && size == 2) { 91 return pcnet_aprom_readb(d, addr) | 92 (pcnet_aprom_readb(d, addr + 1) << 8); 93 } else if (BCR_DWIO(d) && (addr & 3) == 0 && size == 4) { 94 return pcnet_aprom_readb(d, addr) | 95 (pcnet_aprom_readb(d, addr + 1) << 8) | 96 (pcnet_aprom_readb(d, addr + 2) << 16) | 97 (pcnet_aprom_readb(d, addr + 3) << 24); 98 } 99 } else { 100 if (size == 2) { 101 return pcnet_ioport_readw(d, addr); 102 } else if (size == 4) { 103 return pcnet_ioport_readl(d, addr); 104 } 105 } 106 return ((uint64_t)1 << (size * 8)) - 1; 107 } 108 109 static void pcnet_ioport_write(void *opaque, hwaddr addr, 110 uint64_t data, unsigned size) 111 { 112 PCNetState *d = opaque; 113 114 trace_pcnet_ioport_write(opaque, addr, data, size); 115 if (addr < 0x10) { 116 if (!BCR_DWIO(d) && size == 1) { 117 pcnet_aprom_writeb(d, addr, data); 118 } else if (!BCR_DWIO(d) && (addr & 1) == 0 && size == 2) { 119 pcnet_aprom_writeb(d, addr, data & 0xff); 120 pcnet_aprom_writeb(d, addr + 1, data >> 8); 121 } else if (BCR_DWIO(d) && (addr & 3) == 0 && size == 4) { 122 pcnet_aprom_writeb(d, addr, data & 0xff); 123 pcnet_aprom_writeb(d, addr + 1, (data >> 8) & 0xff); 124 pcnet_aprom_writeb(d, addr + 2, (data >> 16) & 0xff); 125 pcnet_aprom_writeb(d, addr + 3, data >> 24); 126 } 127 } else { 128 if (size == 2) { 129 pcnet_ioport_writew(d, addr, data); 130 } else if (size == 4) { 131 pcnet_ioport_writel(d, addr, data); 132 } 133 } 134 } 135 136 static const MemoryRegionOps pcnet_io_ops = { 137 .read = pcnet_ioport_read, 138 .write = pcnet_ioport_write, 139 .endianness = DEVICE_LITTLE_ENDIAN, 140 }; 141 142 static void pcnet_mmio_writeb(void *opaque, hwaddr addr, uint32_t val) 143 { 144 PCNetState *d = opaque; 145 146 trace_pcnet_mmio_writeb(opaque, addr, val); 147 if (!(addr & 0x10)) 148 pcnet_aprom_writeb(d, addr & 0x0f, val); 149 } 150 151 static uint32_t pcnet_mmio_readb(void *opaque, hwaddr addr) 152 { 153 PCNetState *d = opaque; 154 uint32_t val = -1; 155 156 if (!(addr & 0x10)) 157 val = pcnet_aprom_readb(d, addr & 0x0f); 158 trace_pcnet_mmio_readb(opaque, addr, val); 159 return val; 160 } 161 162 static void pcnet_mmio_writew(void *opaque, hwaddr addr, uint32_t val) 163 { 164 PCNetState *d = opaque; 165 166 trace_pcnet_mmio_writew(opaque, addr, val); 167 if (addr & 0x10) 168 pcnet_ioport_writew(d, addr & 0x0f, val); 169 else { 170 addr &= 0x0f; 171 pcnet_aprom_writeb(d, addr, val & 0xff); 172 pcnet_aprom_writeb(d, addr+1, (val & 0xff00) >> 8); 173 } 174 } 175 176 static uint32_t pcnet_mmio_readw(void *opaque, hwaddr addr) 177 { 178 PCNetState *d = opaque; 179 uint32_t val = -1; 180 181 if (addr & 0x10) 182 val = pcnet_ioport_readw(d, addr & 0x0f); 183 else { 184 addr &= 0x0f; 185 val = pcnet_aprom_readb(d, addr+1); 186 val <<= 8; 187 val |= pcnet_aprom_readb(d, addr); 188 } 189 trace_pcnet_mmio_readw(opaque, addr, val); 190 return val; 191 } 192 193 static void pcnet_mmio_writel(void *opaque, hwaddr addr, uint32_t val) 194 { 195 PCNetState *d = opaque; 196 197 trace_pcnet_mmio_writel(opaque, addr, val); 198 if (addr & 0x10) 199 pcnet_ioport_writel(d, addr & 0x0f, val); 200 else { 201 addr &= 0x0f; 202 pcnet_aprom_writeb(d, addr, val & 0xff); 203 pcnet_aprom_writeb(d, addr+1, (val & 0xff00) >> 8); 204 pcnet_aprom_writeb(d, addr+2, (val & 0xff0000) >> 16); 205 pcnet_aprom_writeb(d, addr+3, (val & 0xff000000) >> 24); 206 } 207 } 208 209 static uint32_t pcnet_mmio_readl(void *opaque, hwaddr addr) 210 { 211 PCNetState *d = opaque; 212 uint32_t val; 213 214 if (addr & 0x10) 215 val = pcnet_ioport_readl(d, addr & 0x0f); 216 else { 217 addr &= 0x0f; 218 val = pcnet_aprom_readb(d, addr+3); 219 val <<= 8; 220 val |= pcnet_aprom_readb(d, addr+2); 221 val <<= 8; 222 val |= pcnet_aprom_readb(d, addr+1); 223 val <<= 8; 224 val |= pcnet_aprom_readb(d, addr); 225 } 226 trace_pcnet_mmio_readl(opaque, addr, val); 227 return val; 228 } 229 230 static const VMStateDescription vmstate_pci_pcnet = { 231 .name = "pcnet", 232 .version_id = 3, 233 .minimum_version_id = 2, 234 .fields = (VMStateField[]) { 235 VMSTATE_PCI_DEVICE(parent_obj, PCIPCNetState), 236 VMSTATE_STRUCT(state, PCIPCNetState, 0, vmstate_pcnet, PCNetState), 237 VMSTATE_END_OF_LIST() 238 } 239 }; 240 241 /* PCI interface */ 242 243 static const MemoryRegionOps pcnet_mmio_ops = { 244 .old_mmio = { 245 .read = { pcnet_mmio_readb, pcnet_mmio_readw, pcnet_mmio_readl }, 246 .write = { pcnet_mmio_writeb, pcnet_mmio_writew, pcnet_mmio_writel }, 247 }, 248 .endianness = DEVICE_LITTLE_ENDIAN, 249 }; 250 251 static void pci_physical_memory_write(void *dma_opaque, hwaddr addr, 252 uint8_t *buf, int len, int do_bswap) 253 { 254 pci_dma_write(dma_opaque, addr, buf, len); 255 } 256 257 static void pci_physical_memory_read(void *dma_opaque, hwaddr addr, 258 uint8_t *buf, int len, int do_bswap) 259 { 260 pci_dma_read(dma_opaque, addr, buf, len); 261 } 262 263 static void pci_pcnet_uninit(PCIDevice *dev) 264 { 265 PCIPCNetState *d = PCI_PCNET(dev); 266 267 qemu_free_irq(d->state.irq); 268 timer_del(d->state.poll_timer); 269 timer_free(d->state.poll_timer); 270 qemu_del_nic(d->state.nic); 271 } 272 273 static NetClientInfo net_pci_pcnet_info = { 274 .type = NET_CLIENT_OPTIONS_KIND_NIC, 275 .size = sizeof(NICState), 276 .receive = pcnet_receive, 277 .link_status_changed = pcnet_set_link_status, 278 }; 279 280 static void pci_pcnet_realize(PCIDevice *pci_dev, Error **errp) 281 { 282 PCIPCNetState *d = PCI_PCNET(pci_dev); 283 PCNetState *s = &d->state; 284 uint8_t *pci_conf; 285 286 #if 0 287 printf("sizeof(RMD)=%d, sizeof(TMD)=%d\n", 288 sizeof(struct pcnet_RMD), sizeof(struct pcnet_TMD)); 289 #endif 290 291 pci_conf = pci_dev->config; 292 293 pci_set_word(pci_conf + PCI_STATUS, 294 PCI_STATUS_FAST_BACK | PCI_STATUS_DEVSEL_MEDIUM); 295 296 pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, 0x0); 297 pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, 0x0); 298 299 pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */ 300 pci_conf[PCI_MIN_GNT] = 0x06; 301 pci_conf[PCI_MAX_LAT] = 0xff; 302 303 /* Handler for memory-mapped I/O */ 304 memory_region_init_io(&d->state.mmio, OBJECT(d), &pcnet_mmio_ops, s, 305 "pcnet-mmio", PCNET_PNPMMIO_SIZE); 306 307 memory_region_init_io(&d->io_bar, OBJECT(d), &pcnet_io_ops, s, "pcnet-io", 308 PCNET_IOPORT_SIZE); 309 pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->io_bar); 310 311 pci_register_bar(pci_dev, 1, 0, &s->mmio); 312 313 s->irq = pci_allocate_irq(pci_dev); 314 s->phys_mem_read = pci_physical_memory_read; 315 s->phys_mem_write = pci_physical_memory_write; 316 s->dma_opaque = pci_dev; 317 318 pcnet_common_init(DEVICE(pci_dev), s, &net_pci_pcnet_info); 319 } 320 321 static void pci_reset(DeviceState *dev) 322 { 323 PCIPCNetState *d = PCI_PCNET(dev); 324 325 pcnet_h_reset(&d->state); 326 } 327 328 static void pcnet_instance_init(Object *obj) 329 { 330 PCIPCNetState *d = PCI_PCNET(obj); 331 PCNetState *s = &d->state; 332 333 device_add_bootindex_property(obj, &s->conf.bootindex, 334 "bootindex", "/ethernet-phy@0", 335 DEVICE(obj), NULL); 336 } 337 338 static Property pcnet_properties[] = { 339 DEFINE_NIC_PROPERTIES(PCIPCNetState, state.conf), 340 DEFINE_PROP_END_OF_LIST(), 341 }; 342 343 static void pcnet_class_init(ObjectClass *klass, void *data) 344 { 345 DeviceClass *dc = DEVICE_CLASS(klass); 346 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 347 348 k->realize = pci_pcnet_realize; 349 k->exit = pci_pcnet_uninit; 350 k->romfile = "efi-pcnet.rom", 351 k->vendor_id = PCI_VENDOR_ID_AMD; 352 k->device_id = PCI_DEVICE_ID_AMD_LANCE; 353 k->revision = 0x10; 354 k->class_id = PCI_CLASS_NETWORK_ETHERNET; 355 dc->reset = pci_reset; 356 dc->vmsd = &vmstate_pci_pcnet; 357 dc->props = pcnet_properties; 358 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 359 } 360 361 static const TypeInfo pcnet_info = { 362 .name = TYPE_PCI_PCNET, 363 .parent = TYPE_PCI_DEVICE, 364 .instance_size = sizeof(PCIPCNetState), 365 .class_init = pcnet_class_init, 366 .instance_init = pcnet_instance_init, 367 }; 368 369 static void pci_pcnet_register_types(void) 370 { 371 type_register_static(&pcnet_info); 372 } 373 374 type_init(pci_pcnet_register_types) 375