hw/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 "pci.h"
  31 #include "net.h"
  32 #include "loader.h"
  33 #include "qemu-timer.h"
  34
  35 #include "pcnet.h"
  36
  37 //#define PCNET_DEBUG
  38 //#define PCNET_DEBUG_IO
  39 //#define PCNET_DEBUG_BCR
  40 //#define PCNET_DEBUG_CSR
  41 //#define PCNET_DEBUG_RMD
  42 //#define PCNET_DEBUG_TMD
  43 //#define PCNET_DEBUG_MATCH
  44
  45
  46 typedef struct {
  47     PCIDevice pci_dev;
  48     PCNetState state;
  49     MemoryRegion io_bar;
  50 } PCIPCNetState;
  51
  52 static void pcnet_aprom_writeb(void *opaque, uint32_t addr, uint32_t val)
  53 {
  54     PCNetState *s = opaque;
  55 #ifdef PCNET_DEBUG
  56     printf("pcnet_aprom_writeb addr=0x%08x val=0x%02x\n", addr, val);
  57 #endif
  58     /* Check APROMWE bit to enable write access */
  59     if (pcnet_bcr_readw(s,2) & 0x100)
  60         s->prom[addr & 15] = val;
  61 }
  62
  63 static uint32_t pcnet_aprom_readb(void *opaque, uint32_t addr)
  64 {
  65     PCNetState *s = opaque;
  66     uint32_t val = s->prom[addr & 15];
  67 #ifdef PCNET_DEBUG
  68     printf("pcnet_aprom_readb addr=0x%08x val=0x%02x\n", addr, val);
  69 #endif
  70     return val;
  71 }
  72
  73 static uint64_t pcnet_ioport_read(void *opaque, target_phys_addr_t addr,
  74                                   unsigned size)
  75 {
  76     PCNetState *d = opaque;
  77
  78     if (addr < 16 && size == 1) {
  79         return pcnet_aprom_readb(d, addr);
  80     } else if (addr >= 0x10 && addr < 0x20 && size == 2) {
  81         return pcnet_ioport_readw(d, addr);
  82     } else if (addr >= 0x10 && addr < 0x20 && size == 4) {
  83         return pcnet_ioport_readl(d, addr);
  84     }
  85     return ((uint64_t)1 << (size * 8)) - 1;
  86 }
  87
  88 static void pcnet_ioport_write(void *opaque, target_phys_addr_t addr,
  89                                uint64_t data, unsigned size)
  90 {
  91     PCNetState *d = opaque;
  92
  93     if (addr < 16 && size == 1) {
  94         return pcnet_aprom_writeb(d, addr, data);
  95     } else if (addr >= 0x10 && addr < 0x20 && size == 2) {
  96         return pcnet_ioport_writew(d, addr, data);
  97     } else if (addr >= 0x10 && addr < 0x20 && size == 4) {
  98         return pcnet_ioport_writel(d, addr, data);
  99     }
 100 }
 101
 102 static const MemoryRegionOps pcnet_io_ops = {
 103     .read = pcnet_ioport_read,
 104     .write = pcnet_ioport_write,
 105     .endianness = DEVICE_NATIVE_ENDIAN,
 106 };
 107
 108 static void pcnet_mmio_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
 109 {
 110     PCNetState *d = opaque;
 111 #ifdef PCNET_DEBUG_IO
 112     printf("pcnet_mmio_writeb addr=0x" TARGET_FMT_plx" val=0x%02x\n", addr,
 113            val);
 114 #endif
 115     if (!(addr & 0x10))
 116         pcnet_aprom_writeb(d, addr & 0x0f, val);
 117 }
 118
 119 static uint32_t pcnet_mmio_readb(void *opaque, target_phys_addr_t addr)
 120 {
 121     PCNetState *d = opaque;
 122     uint32_t val = -1;
 123     if (!(addr & 0x10))
 124         val = pcnet_aprom_readb(d, addr & 0x0f);
 125 #ifdef PCNET_DEBUG_IO
 126     printf("pcnet_mmio_readb addr=0x" TARGET_FMT_plx " val=0x%02x\n", addr,
 127            val & 0xff);
 128 #endif
 129     return val;
 130 }
 131
 132 static void pcnet_mmio_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
 133 {
 134     PCNetState *d = opaque;
 135 #ifdef PCNET_DEBUG_IO
 136     printf("pcnet_mmio_writew addr=0x" TARGET_FMT_plx " val=0x%04x\n", addr,
 137            val);
 138 #endif
 139     if (addr & 0x10)
 140         pcnet_ioport_writew(d, addr & 0x0f, val);
 141     else {
 142         addr &= 0x0f;
 143         pcnet_aprom_writeb(d, addr, val & 0xff);
 144         pcnet_aprom_writeb(d, addr+1, (val & 0xff00) >> 8);
 145     }
 146 }
 147
 148 static uint32_t pcnet_mmio_readw(void *opaque, target_phys_addr_t addr)
 149 {
 150     PCNetState *d = opaque;
 151     uint32_t val = -1;
 152     if (addr & 0x10)
 153         val = pcnet_ioport_readw(d, addr & 0x0f);
 154     else {
 155         addr &= 0x0f;
 156         val = pcnet_aprom_readb(d, addr+1);
 157         val <<= 8;
 158         val |= pcnet_aprom_readb(d, addr);
 159     }
 160 #ifdef PCNET_DEBUG_IO
 161     printf("pcnet_mmio_readw addr=0x" TARGET_FMT_plx" val = 0x%04x\n", addr,
 162            val & 0xffff);
 163 #endif
 164     return val;
 165 }
 166
 167 static void pcnet_mmio_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
 168 {
 169     PCNetState *d = opaque;
 170 #ifdef PCNET_DEBUG_IO
 171     printf("pcnet_mmio_writel addr=0x" TARGET_FMT_plx" val=0x%08x\n", addr,
 172            val);
 173 #endif
 174     if (addr & 0x10)
 175         pcnet_ioport_writel(d, addr & 0x0f, val);
 176     else {
 177         addr &= 0x0f;
 178         pcnet_aprom_writeb(d, addr, val & 0xff);
 179         pcnet_aprom_writeb(d, addr+1, (val & 0xff00) >> 8);
 180         pcnet_aprom_writeb(d, addr+2, (val & 0xff0000) >> 16);
 181         pcnet_aprom_writeb(d, addr+3, (val & 0xff000000) >> 24);
 182     }
 183 }
 184
 185 static uint32_t pcnet_mmio_readl(void *opaque, target_phys_addr_t addr)
 186 {
 187     PCNetState *d = opaque;
 188     uint32_t val;
 189     if (addr & 0x10)
 190         val = pcnet_ioport_readl(d, addr & 0x0f);
 191     else {
 192         addr &= 0x0f;
 193         val = pcnet_aprom_readb(d, addr+3);
 194         val <<= 8;
 195         val |= pcnet_aprom_readb(d, addr+2);
 196         val <<= 8;
 197         val |= pcnet_aprom_readb(d, addr+1);
 198         val <<= 8;
 199         val |= pcnet_aprom_readb(d, addr);
 200     }
 201 #ifdef PCNET_DEBUG_IO
 202     printf("pcnet_mmio_readl addr=0x" TARGET_FMT_plx " val=0x%08x\n", addr,
 203            val);
 204 #endif
 205     return val;
 206 }
 207
 208 static const VMStateDescription vmstate_pci_pcnet = {
 209     .name = "pcnet",
 210     .version_id = 3,
 211     .minimum_version_id = 2,
 212     .minimum_version_id_old = 2,
 213     .fields      = (VMStateField []) {
 214         VMSTATE_PCI_DEVICE(pci_dev, PCIPCNetState),
 215         VMSTATE_STRUCT(state, PCIPCNetState, 0, vmstate_pcnet, PCNetState),
 216         VMSTATE_END_OF_LIST()
 217     }
 218 };
 219
 220 /* PCI interface */
 221
 222 static const MemoryRegionOps pcnet_mmio_ops = {
 223     .old_mmio = {
 224         .read = { pcnet_mmio_readb, pcnet_mmio_readw, pcnet_mmio_readl },
 225         .write = { pcnet_mmio_writeb, pcnet_mmio_writew, pcnet_mmio_writel },
 226     },
 227     .endianness = DEVICE_NATIVE_ENDIAN,
 228 };
 229
 230 static void pci_physical_memory_write(void *dma_opaque, target_phys_addr_t addr,
 231                                       uint8_t *buf, int len, int do_bswap)
 232 {
 233     cpu_physical_memory_write(addr, buf, len);
 234 }
 235
 236 static void pci_physical_memory_read(void *dma_opaque, target_phys_addr_t addr,
 237                                      uint8_t *buf, int len, int do_bswap)
 238 {
 239     cpu_physical_memory_read(addr, buf, len);
 240 }
 241
 242 static void pci_pcnet_cleanup(VLANClientState *nc)
 243 {
 244     PCNetState *d = DO_UPCAST(NICState, nc, nc)->opaque;
 245
 246     pcnet_common_cleanup(d);
 247 }
 248
 249 static int pci_pcnet_uninit(PCIDevice *dev)
 250 {
 251     PCIPCNetState *d = DO_UPCAST(PCIPCNetState, pci_dev, dev);
 252
 253     memory_region_destroy(&d->state.mmio);
 254     memory_region_destroy(&d->io_bar);
 255     qemu_del_timer(d->state.poll_timer);
 256     qemu_free_timer(d->state.poll_timer);
 257     qemu_del_vlan_client(&d->state.nic->nc);
 258     return 0;
 259 }
 260
 261 static NetClientInfo net_pci_pcnet_info = {
 262     .type = NET_CLIENT_TYPE_NIC,
 263     .size = sizeof(NICState),
 264     .can_receive = pcnet_can_receive,
 265     .receive = pcnet_receive,
 266     .cleanup = pci_pcnet_cleanup,
 267 };
 268
 269 static int pci_pcnet_init(PCIDevice *pci_dev)
 270 {
 271     PCIPCNetState *d = DO_UPCAST(PCIPCNetState, pci_dev, pci_dev);
 272     PCNetState *s = &d->state;
 273     uint8_t *pci_conf;
 274
 275 #if 0
 276     printf("sizeof(RMD)=%d, sizeof(TMD)=%d\n",
 277         sizeof(struct pcnet_RMD), sizeof(struct pcnet_TMD));
 278 #endif
 279
 280     pci_conf = pci_dev->config;
 281
 282     pci_set_word(pci_conf + PCI_STATUS,
 283                  PCI_STATUS_FAST_BACK | PCI_STATUS_DEVSEL_MEDIUM);
 284
 285     pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, 0x0);
 286     pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, 0x0);
 287
 288     pci_conf[PCI_INTERRUPT_PIN] = 1; // interrupt pin 0
 289     pci_conf[PCI_MIN_GNT] = 0x06;
 290     pci_conf[PCI_MAX_LAT] = 0xff;
 291
 292     /* Handler for memory-mapped I/O */
 293     memory_region_init_io(&d->state.mmio, &pcnet_mmio_ops, s, "pcnet-mmio",
 294                           PCNET_PNPMMIO_SIZE);
 295
 296     memory_region_init_io(&d->io_bar, &pcnet_io_ops, s, "pcnet-io",
 297                           PCNET_IOPORT_SIZE);
 298     pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->io_bar);
 299
 300     pci_register_bar(pci_dev, 1, 0, &s->mmio);
 301
 302     s->irq = pci_dev->irq[0];
 303     s->phys_mem_read = pci_physical_memory_read;
 304     s->phys_mem_write = pci_physical_memory_write;
 305
 306     if (!pci_dev->qdev.hotplugged) {
 307         static int loaded = 0;
 308         if (!loaded) {
 309             rom_add_option("pxe-pcnet.rom", -1);
 310             loaded = 1;
 311         }
 312     }
 313
 314     return pcnet_common_init(&pci_dev->qdev, s, &net_pci_pcnet_info);
 315 }
 316
 317 static void pci_reset(DeviceState *dev)
 318 {
 319     PCIPCNetState *d = DO_UPCAST(PCIPCNetState, pci_dev.qdev, dev);
 320
 321     pcnet_h_reset(&d->state);
 322 }
 323
 324 static PCIDeviceInfo pcnet_info = {
 325     .qdev.name  = "pcnet",
 326     .qdev.size  = sizeof(PCIPCNetState),
 327     .qdev.reset = pci_reset,
 328     .qdev.vmsd  = &vmstate_pci_pcnet,
 329     .init       = pci_pcnet_init,
 330     .exit       = pci_pcnet_uninit,
 331     .vendor_id  = PCI_VENDOR_ID_AMD,
 332     .device_id  = PCI_DEVICE_ID_AMD_LANCE,
 333     .revision   = 0x10,
 334     .class_id   = PCI_CLASS_NETWORK_ETHERNET,
 335     .qdev.props = (Property[]) {
 336         DEFINE_NIC_PROPERTIES(PCIPCNetState, state.conf),
 337         DEFINE_PROP_END_OF_LIST(),
 338     }
 339 };
 340
 341 static void pci_pcnet_register_devices(void)
 342 {
 343     pci_qdev_register(&pcnet_info);
 344 }
 345
 346 device_init(pci_pcnet_register_devices)