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 "qemu/osdep.h" 31 #include "hw/irq.h" 32 #include "hw/pci/pci_device.h" 33 #include "hw/qdev-properties.h" 34 #include "migration/vmstate.h" 35 #include "net/net.h" 36 #include "qemu/module.h" 37 #include "qemu/timer.h" 38 #include "sysemu/dma.h" 39 #include "sysemu/sysemu.h" 40 #include "trace.h" 41 42 #include "pcnet.h" 43 #include "qom/object.h" 44 45 //#define PCNET_DEBUG 46 //#define PCNET_DEBUG_IO 47 //#define PCNET_DEBUG_BCR 48 //#define PCNET_DEBUG_CSR 49 //#define PCNET_DEBUG_RMD 50 //#define PCNET_DEBUG_TMD 51 //#define PCNET_DEBUG_MATCH 52 53 #define TYPE_PCI_PCNET "pcnet" 54 55 OBJECT_DECLARE_SIMPLE_TYPE(PCIPCNetState, PCI_PCNET) 56 57 struct PCIPCNetState { 58 /*< private >*/ 59 PCIDevice parent_obj; 60 /*< public >*/ 61 62 PCNetState state; 63 MemoryRegion io_bar; 64 }; 65 66 static void pcnet_aprom_writeb(void *opaque, uint32_t addr, uint32_t val) 67 { 68 PCNetState *s = opaque; 69 70 trace_pcnet_aprom_writeb(opaque, addr, val); 71 if (BCR_APROMWE(s)) { 72 s->prom[addr & 15] = val; 73 } 74 } 75 76 static uint32_t pcnet_aprom_readb(void *opaque, uint32_t addr) 77 { 78 PCNetState *s = opaque; 79 uint32_t val = s->prom[addr & 15]; 80 81 trace_pcnet_aprom_readb(opaque, addr, val); 82 return val; 83 } 84 85 static uint64_t pcnet_ioport_read(void *opaque, hwaddr addr, 86 unsigned size) 87 { 88 PCNetState *d = opaque; 89 90 trace_pcnet_ioport_read(opaque, addr, size); 91 if (addr < 0x10) { 92 if (!BCR_DWIO(d) && size == 1) { 93 return pcnet_aprom_readb(d, addr); 94 } else if (!BCR_DWIO(d) && (addr & 1) == 0 && size == 2) { 95 return pcnet_aprom_readb(d, addr) | 96 (pcnet_aprom_readb(d, addr + 1) << 8); 97 } else if (BCR_DWIO(d) && (addr & 3) == 0 && size == 4) { 98 return pcnet_aprom_readb(d, addr) | 99 (pcnet_aprom_readb(d, addr + 1) << 8) | 100 (pcnet_aprom_readb(d, addr + 2) << 16) | 101 (pcnet_aprom_readb(d, addr + 3) << 24); 102 } 103 } else { 104 if (size == 2) { 105 return pcnet_ioport_readw(d, addr); 106 } else if (size == 4) { 107 return pcnet_ioport_readl(d, addr); 108 } 109 } 110 return ((uint64_t)1 << (size * 8)) - 1; 111 } 112 113 static void pcnet_ioport_write(void *opaque, hwaddr addr, 114 uint64_t data, unsigned size) 115 { 116 PCNetState *d = opaque; 117 118 trace_pcnet_ioport_write(opaque, addr, data, size); 119 if (addr < 0x10) { 120 if (!BCR_DWIO(d) && size == 1) { 121 pcnet_aprom_writeb(d, addr, data); 122 } else if (!BCR_DWIO(d) && (addr & 1) == 0 && size == 2) { 123 pcnet_aprom_writeb(d, addr, data & 0xff); 124 pcnet_aprom_writeb(d, addr + 1, data >> 8); 125 } else if (BCR_DWIO(d) && (addr & 3) == 0 && size == 4) { 126 pcnet_aprom_writeb(d, addr, data & 0xff); 127 pcnet_aprom_writeb(d, addr + 1, (data >> 8) & 0xff); 128 pcnet_aprom_writeb(d, addr + 2, (data >> 16) & 0xff); 129 pcnet_aprom_writeb(d, addr + 3, data >> 24); 130 } 131 } else { 132 if (size == 2) { 133 pcnet_ioport_writew(d, addr, data); 134 } else if (size == 4) { 135 pcnet_ioport_writel(d, addr, data); 136 } 137 } 138 } 139 140 static const MemoryRegionOps pcnet_io_ops = { 141 .read = pcnet_ioport_read, 142 .write = pcnet_ioport_write, 143 .endianness = DEVICE_LITTLE_ENDIAN, 144 }; 145 146 static const VMStateDescription vmstate_pci_pcnet = { 147 .name = "pcnet", 148 .version_id = 3, 149 .minimum_version_id = 2, 150 .fields = (VMStateField[]) { 151 VMSTATE_PCI_DEVICE(parent_obj, PCIPCNetState), 152 VMSTATE_STRUCT(state, PCIPCNetState, 0, vmstate_pcnet, PCNetState), 153 VMSTATE_END_OF_LIST() 154 } 155 }; 156 157 /* PCI interface */ 158 159 static const MemoryRegionOps pcnet_mmio_ops = { 160 .read = pcnet_ioport_read, 161 .write = pcnet_ioport_write, 162 .valid.min_access_size = 1, 163 .valid.max_access_size = 4, 164 .impl.min_access_size = 1, 165 .impl.max_access_size = 4, 166 .endianness = DEVICE_LITTLE_ENDIAN, 167 }; 168 169 static void pci_physical_memory_write(void *dma_opaque, hwaddr addr, 170 uint8_t *buf, int len, int do_bswap) 171 { 172 pci_dma_write(dma_opaque, addr, buf, len); 173 } 174 175 static void pci_physical_memory_read(void *dma_opaque, hwaddr addr, 176 uint8_t *buf, int len, int do_bswap) 177 { 178 pci_dma_read(dma_opaque, addr, buf, len); 179 } 180 181 static void pci_pcnet_uninit(PCIDevice *dev) 182 { 183 PCIPCNetState *d = PCI_PCNET(dev); 184 185 qemu_free_irq(d->state.irq); 186 timer_free(d->state.poll_timer); 187 qemu_del_nic(d->state.nic); 188 } 189 190 static NetClientInfo net_pci_pcnet_info = { 191 .type = NET_CLIENT_DRIVER_NIC, 192 .size = sizeof(NICState), 193 .receive = pcnet_receive, 194 .link_status_changed = pcnet_set_link_status, 195 }; 196 197 static void pci_pcnet_realize(PCIDevice *pci_dev, Error **errp) 198 { 199 PCIPCNetState *d = PCI_PCNET(pci_dev); 200 PCNetState *s = &d->state; 201 uint8_t *pci_conf; 202 203 #if 0 204 printf("sizeof(RMD)=%d, sizeof(TMD)=%d\n", 205 sizeof(struct pcnet_RMD), sizeof(struct pcnet_TMD)); 206 #endif 207 208 pci_conf = pci_dev->config; 209 210 pci_set_word(pci_conf + PCI_STATUS, 211 PCI_STATUS_FAST_BACK | PCI_STATUS_DEVSEL_MEDIUM); 212 213 pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, 0x0); 214 pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, 0x0); 215 216 pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */ 217 pci_conf[PCI_MIN_GNT] = 0x06; 218 pci_conf[PCI_MAX_LAT] = 0xff; 219 220 /* Handler for memory-mapped I/O */ 221 memory_region_init_io(&d->state.mmio, OBJECT(d), &pcnet_mmio_ops, s, 222 "pcnet-mmio", PCNET_PNPMMIO_SIZE); 223 224 memory_region_init_io(&d->io_bar, OBJECT(d), &pcnet_io_ops, s, "pcnet-io", 225 PCNET_IOPORT_SIZE); 226 pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->io_bar); 227 228 pci_register_bar(pci_dev, 1, 0, &s->mmio); 229 230 s->irq = pci_allocate_irq(pci_dev); 231 s->phys_mem_read = pci_physical_memory_read; 232 s->phys_mem_write = pci_physical_memory_write; 233 s->dma_opaque = DEVICE(pci_dev); 234 235 pcnet_common_init(DEVICE(pci_dev), s, &net_pci_pcnet_info); 236 } 237 238 static void pci_reset(DeviceState *dev) 239 { 240 PCIPCNetState *d = PCI_PCNET(dev); 241 242 pcnet_h_reset(&d->state); 243 } 244 245 static void pcnet_instance_init(Object *obj) 246 { 247 PCIPCNetState *d = PCI_PCNET(obj); 248 PCNetState *s = &d->state; 249 250 device_add_bootindex_property(obj, &s->conf.bootindex, 251 "bootindex", "/ethernet-phy@0", 252 DEVICE(obj)); 253 } 254 255 static Property pcnet_properties[] = { 256 DEFINE_NIC_PROPERTIES(PCIPCNetState, state.conf), 257 DEFINE_PROP_END_OF_LIST(), 258 }; 259 260 static void pcnet_class_init(ObjectClass *klass, void *data) 261 { 262 DeviceClass *dc = DEVICE_CLASS(klass); 263 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 264 265 k->realize = pci_pcnet_realize; 266 k->exit = pci_pcnet_uninit; 267 k->romfile = "efi-pcnet.rom", 268 k->vendor_id = PCI_VENDOR_ID_AMD; 269 k->device_id = PCI_DEVICE_ID_AMD_LANCE; 270 k->revision = 0x10; 271 k->class_id = PCI_CLASS_NETWORK_ETHERNET; 272 dc->reset = pci_reset; 273 dc->vmsd = &vmstate_pci_pcnet; 274 device_class_set_props(dc, pcnet_properties); 275 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 276 } 277 278 static const TypeInfo pcnet_info = { 279 .name = TYPE_PCI_PCNET, 280 .parent = TYPE_PCI_DEVICE, 281 .instance_size = sizeof(PCIPCNetState), 282 .class_init = pcnet_class_init, 283 .instance_init = pcnet_instance_init, 284 .interfaces = (InterfaceInfo[]) { 285 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 286 { }, 287 }, 288 }; 289 290 static void pci_pcnet_register_types(void) 291 { 292 type_register_static(&pcnet_info); 293 } 294 295 type_init(pci_pcnet_register_types) 296