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