hw/net/pcnet-pci.c

   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     .can_receive = pcnet_can_receive,
 277     .receive = pcnet_receive,
 278     .link_status_changed = pcnet_set_link_status,
 279 };
 280
 281 static void pci_pcnet_realize(PCIDevice *pci_dev, Error **errp)
 282 {
 283     PCIPCNetState *d = PCI_PCNET(pci_dev);
 284     PCNetState *s = &d->state;
 285     uint8_t *pci_conf;
 286
 287 #if 0
 288     printf("sizeof(RMD)=%d, sizeof(TMD)=%d\n",
 289         sizeof(struct pcnet_RMD), sizeof(struct pcnet_TMD));
 290 #endif
 291
 292     pci_conf = pci_dev->config;
 293
 294     pci_set_word(pci_conf + PCI_STATUS,
 295                  PCI_STATUS_FAST_BACK | PCI_STATUS_DEVSEL_MEDIUM);
 296
 297     pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, 0x0);
 298     pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, 0x0);
 299
 300     pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */
 301     pci_conf[PCI_MIN_GNT] = 0x06;
 302     pci_conf[PCI_MAX_LAT] = 0xff;
 303
 304     /* Handler for memory-mapped I/O */
 305     memory_region_init_io(&d->state.mmio, OBJECT(d), &pcnet_mmio_ops, s,
 306                           "pcnet-mmio", PCNET_PNPMMIO_SIZE);
 307
 308     memory_region_init_io(&d->io_bar, OBJECT(d), &pcnet_io_ops, s, "pcnet-io",
 309                           PCNET_IOPORT_SIZE);
 310     pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->io_bar);
 311
 312     pci_register_bar(pci_dev, 1, 0, &s->mmio);
 313
 314     s->irq = pci_allocate_irq(pci_dev);
 315     s->phys_mem_read = pci_physical_memory_read;
 316     s->phys_mem_write = pci_physical_memory_write;
 317     s->dma_opaque = pci_dev;
 318
 319     pcnet_common_init(DEVICE(pci_dev), s, &net_pci_pcnet_info);
 320 }
 321
 322 static void pci_reset(DeviceState *dev)
 323 {
 324     PCIPCNetState *d = PCI_PCNET(dev);
 325
 326     pcnet_h_reset(&d->state);
 327 }
 328
 329 static void pcnet_instance_init(Object *obj)
 330 {
 331     PCIPCNetState *d = PCI_PCNET(obj);
 332     PCNetState *s = &d->state;
 333
 334     device_add_bootindex_property(obj, &s->conf.bootindex,
 335                                   "bootindex", "/ethernet-phy@0",
 336                                   DEVICE(obj), NULL);
 337 }
 338
 339 static Property pcnet_properties[] = {
 340     DEFINE_NIC_PROPERTIES(PCIPCNetState, state.conf),
 341     DEFINE_PROP_END_OF_LIST(),
 342 };
 343
 344 static void pcnet_class_init(ObjectClass *klass, void *data)
 345 {
 346     DeviceClass *dc = DEVICE_CLASS(klass);
 347     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 348
 349     k->realize = pci_pcnet_realize;
 350     k->exit = pci_pcnet_uninit;
 351     k->romfile = "efi-pcnet.rom",
 352     k->vendor_id = PCI_VENDOR_ID_AMD;
 353     k->device_id = PCI_DEVICE_ID_AMD_LANCE;
 354     k->revision = 0x10;
 355     k->class_id = PCI_CLASS_NETWORK_ETHERNET;
 356     dc->reset = pci_reset;
 357     dc->vmsd = &vmstate_pci_pcnet;
 358     dc->props = pcnet_properties;
 359     set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
 360 }
 361
 362 static const TypeInfo pcnet_info = {
 363     .name          = TYPE_PCI_PCNET,
 364     .parent        = TYPE_PCI_DEVICE,
 365     .instance_size = sizeof(PCIPCNetState),
 366     .class_init    = pcnet_class_init,
 367     .instance_init = pcnet_instance_init,
 368 };
 369
 370 static void pci_pcnet_register_types(void)
 371 {
 372     type_register_static(&pcnet_info);
 373 }
 374
 375 type_init(pci_pcnet_register_types)