hw/ne2000.c

   1 /*
   2  * QEMU NE2000 emulation
   3  *
   4  * Copyright (c) 2003-2004 Fabrice Bellard
   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 #include "hw.h"
  25 #include "pci.h"
  26 #include "net.h"
  27 #include "ne2000.h"
  28 #include "loader.h"
  29
  30 /* debug NE2000 card */
  31 //#define DEBUG_NE2000
  32
  33 #define MAX_ETH_FRAME_SIZE 1514
  34
  35 #define E8390_CMD       0x00  /* The command register (for all pages) */
  36 /* Page 0 register offsets. */
  37 #define EN0_CLDALO      0x01    /* Low byte of current local dma addr  RD */
  38 #define EN0_STARTPG     0x01    /* Starting page of ring bfr WR */
  39 #define EN0_CLDAHI      0x02    /* High byte of current local dma addr  RD */
  40 #define EN0_STOPPG      0x02    /* Ending page +1 of ring bfr WR */
  41 #define EN0_BOUNDARY    0x03    /* Boundary page of ring bfr RD WR */
  42 #define EN0_TSR         0x04    /* Transmit status reg RD */
  43 #define EN0_TPSR        0x04    /* Transmit starting page WR */
  44 #define EN0_NCR         0x05    /* Number of collision reg RD */
  45 #define EN0_TCNTLO      0x05    /* Low  byte of tx byte count WR */
  46 #define EN0_FIFO        0x06    /* FIFO RD */
  47 #define EN0_TCNTHI      0x06    /* High byte of tx byte count WR */
  48 #define EN0_ISR         0x07    /* Interrupt status reg RD WR */
  49 #define EN0_CRDALO      0x08    /* low byte of current remote dma address RD */
  50 #define EN0_RSARLO      0x08    /* Remote start address reg 0 */
  51 #define EN0_CRDAHI      0x09    /* high byte, current remote dma address RD */
  52 #define EN0_RSARHI      0x09    /* Remote start address reg 1 */
  53 #define EN0_RCNTLO      0x0a    /* Remote byte count reg WR */
  54 #define EN0_RTL8029ID0  0x0a    /* Realtek ID byte #1 RD */
  55 #define EN0_RCNTHI      0x0b    /* Remote byte count reg WR */
  56 #define EN0_RTL8029ID1  0x0b    /* Realtek ID byte #2 RD */
  57 #define EN0_RSR         0x0c    /* rx status reg RD */
  58 #define EN0_RXCR        0x0c    /* RX configuration reg WR */
  59 #define EN0_TXCR        0x0d    /* TX configuration reg WR */
  60 #define EN0_COUNTER0    0x0d    /* Rcv alignment error counter RD */
  61 #define EN0_DCFG        0x0e    /* Data configuration reg WR */
  62 #define EN0_COUNTER1    0x0e    /* Rcv CRC error counter RD */
  63 #define EN0_IMR         0x0f    /* Interrupt mask reg WR */
  64 #define EN0_COUNTER2    0x0f    /* Rcv missed frame error counter RD */
  65
  66 #define EN1_PHYS        0x11
  67 #define EN1_CURPAG      0x17
  68 #define EN1_MULT        0x18
  69
  70 #define EN2_STARTPG     0x21    /* Starting page of ring bfr RD */
  71 #define EN2_STOPPG      0x22    /* Ending page +1 of ring bfr RD */
  72
  73 #define EN3_CONFIG0     0x33
  74 #define EN3_CONFIG1     0x34
  75 #define EN3_CONFIG2     0x35
  76 #define EN3_CONFIG3     0x36
  77
  78 /*  Register accessed at EN_CMD, the 8390 base addr.  */
  79 #define E8390_STOP      0x01    /* Stop and reset the chip */
  80 #define E8390_START     0x02    /* Start the chip, clear reset */
  81 #define E8390_TRANS     0x04    /* Transmit a frame */
  82 #define E8390_RREAD     0x08    /* Remote read */
  83 #define E8390_RWRITE    0x10    /* Remote write  */
  84 #define E8390_NODMA     0x20    /* Remote DMA */
  85 #define E8390_PAGE0     0x00    /* Select page chip registers */
  86 #define E8390_PAGE1     0x40    /* using the two high-order bits */
  87 #define E8390_PAGE2     0x80    /* Page 3 is invalid. */
  88
  89 /* Bits in EN0_ISR - Interrupt status register */
  90 #define ENISR_RX        0x01    /* Receiver, no error */
  91 #define ENISR_TX        0x02    /* Transmitter, no error */
  92 #define ENISR_RX_ERR    0x04    /* Receiver, with error */
  93 #define ENISR_TX_ERR    0x08    /* Transmitter, with error */
  94 #define ENISR_OVER      0x10    /* Receiver overwrote the ring */
  95 #define ENISR_COUNTERS  0x20    /* Counters need emptying */
  96 #define ENISR_RDC       0x40    /* remote dma complete */
  97 #define ENISR_RESET     0x80    /* Reset completed */
  98 #define ENISR_ALL       0x3f    /* Interrupts we will enable */
  99
 100 /* Bits in received packet status byte and EN0_RSR*/
 101 #define ENRSR_RXOK      0x01    /* Received a good packet */
 102 #define ENRSR_CRC       0x02    /* CRC error */
 103 #define ENRSR_FAE       0x04    /* frame alignment error */
 104 #define ENRSR_FO        0x08    /* FIFO overrun */
 105 #define ENRSR_MPA       0x10    /* missed pkt */
 106 #define ENRSR_PHY       0x20    /* physical/multicast address */
 107 #define ENRSR_DIS       0x40    /* receiver disable. set in monitor mode */
 108 #define ENRSR_DEF       0x80    /* deferring */
 109
 110 /* Transmitted packet status, EN0_TSR. */
 111 #define ENTSR_PTX 0x01  /* Packet transmitted without error */
 112 #define ENTSR_ND  0x02  /* The transmit wasn't deferred. */
 113 #define ENTSR_COL 0x04  /* The transmit collided at least once. */
 114 #define ENTSR_ABT 0x08  /* The transmit collided 16 times, and was deferred. */
 115 #define ENTSR_CRS 0x10  /* The carrier sense was lost. */
 116 #define ENTSR_FU  0x20  /* A "FIFO underrun" occurred during transmit. */
 117 #define ENTSR_CDH 0x40  /* The collision detect "heartbeat" signal was lost. */
 118 #define ENTSR_OWC 0x80  /* There was an out-of-window collision. */
 119
 120 typedef struct PCINE2000State {
 121     PCIDevice dev;
 122     NE2000State ne2000;
 123 } PCINE2000State;
 124
 125 void ne2000_reset(NE2000State *s)
 126 {
 127     int i;
 128
 129     s->isr = ENISR_RESET;
 130     memcpy(s->mem, &s->c.macaddr, 6);
 131     s->mem[14] = 0x57;
 132     s->mem[15] = 0x57;
 133
 134     /* duplicate prom data */
 135     for(i = 15;i >= 0; i--) {
 136         s->mem[2 * i] = s->mem[i];
 137         s->mem[2 * i + 1] = s->mem[i];
 138     }
 139 }
 140
 141 static void ne2000_update_irq(NE2000State *s)
 142 {
 143     int isr;
 144     isr = (s->isr & s->imr) & 0x7f;
 145 #if defined(DEBUG_NE2000)
 146     printf("NE2000: Set IRQ to %d (%02x %02x)\n",
 147            isr ? 1 : 0, s->isr, s->imr);
 148 #endif
 149     qemu_set_irq(s->irq, (isr != 0));
 150 }
 151
 152 #define POLYNOMIAL 0x04c11db6
 153
 154 /* From FreeBSD */
 155 /* XXX: optimize */
 156 static int compute_mcast_idx(const uint8_t *ep)
 157 {
 158     uint32_t crc;
 159     int carry, i, j;
 160     uint8_t b;
 161
 162     crc = 0xffffffff;
 163     for (i = 0; i < 6; i++) {
 164         b = *ep++;
 165         for (j = 0; j < 8; j++) {
 166             carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
 167             crc <<= 1;
 168             b >>= 1;
 169             if (carry)
 170                 crc = ((crc ^ POLYNOMIAL) | carry);
 171         }
 172     }
 173     return (crc >> 26);
 174 }
 175
 176 static int ne2000_buffer_full(NE2000State *s)
 177 {
 178     int avail, index, boundary;
 179
 180     index = s->curpag << 8;
 181     boundary = s->boundary << 8;
 182     if (index < boundary)
 183         avail = boundary - index;
 184     else
 185         avail = (s->stop - s->start) - (index - boundary);
 186     if (avail < (MAX_ETH_FRAME_SIZE + 4))
 187         return 1;
 188     return 0;
 189 }
 190
 191 int ne2000_can_receive(VLANClientState *nc)
 192 {
 193     NE2000State *s = DO_UPCAST(NICState, nc, nc)->opaque;
 194
 195     if (s->cmd & E8390_STOP)
 196         return 1;
 197     return !ne2000_buffer_full(s);
 198 }
 199
 200 #define MIN_BUF_SIZE 60
 201
 202 ssize_t ne2000_receive(VLANClientState *nc, const uint8_t *buf, size_t size_)
 203 {
 204     NE2000State *s = DO_UPCAST(NICState, nc, nc)->opaque;
 205     int size = size_;
 206     uint8_t *p;
 207     unsigned int total_len, next, avail, len, index, mcast_idx;
 208     uint8_t buf1[60];
 209     static const uint8_t broadcast_macaddr[6] =
 210         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 211
 212 #if defined(DEBUG_NE2000)
 213     printf("NE2000: received len=%d\n", size);
 214 #endif
 215
 216     if (s->cmd & E8390_STOP || ne2000_buffer_full(s))
 217         return -1;
 218
 219     /* XXX: check this */
 220     if (s->rxcr & 0x10) {
 221         /* promiscuous: receive all */
 222     } else {
 223         if (!memcmp(buf,  broadcast_macaddr, 6)) {
 224             /* broadcast address */
 225             if (!(s->rxcr & 0x04))
 226                 return size;
 227         } else if (buf[0] & 0x01) {
 228             /* multicast */
 229             if (!(s->rxcr & 0x08))
 230                 return size;
 231             mcast_idx = compute_mcast_idx(buf);
 232             if (!(s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7))))
 233                 return size;
 234         } else if (s->mem[0] == buf[0] &&
 235                    s->mem[2] == buf[1] &&
 236                    s->mem[4] == buf[2] &&
 237                    s->mem[6] == buf[3] &&
 238                    s->mem[8] == buf[4] &&
 239                    s->mem[10] == buf[5]) {
 240             /* match */
 241         } else {
 242             return size;
 243         }
 244     }
 245
 246
 247     /* if too small buffer, then expand it */
 248     if (size < MIN_BUF_SIZE) {
 249         memcpy(buf1, buf, size);
 250         memset(buf1 + size, 0, MIN_BUF_SIZE - size);
 251         buf = buf1;
 252         size = MIN_BUF_SIZE;
 253     }
 254
 255     index = s->curpag << 8;
 256     /* 4 bytes for header */
 257     total_len = size + 4;
 258     /* address for next packet (4 bytes for CRC) */
 259     next = index + ((total_len + 4 + 255) & ~0xff);
 260     if (next >= s->stop)
 261         next -= (s->stop - s->start);
 262     /* prepare packet header */
 263     p = s->mem + index;
 264     s->rsr = ENRSR_RXOK; /* receive status */
 265     /* XXX: check this */
 266     if (buf[0] & 0x01)
 267         s->rsr |= ENRSR_PHY;
 268     p[0] = s->rsr;
 269     p[1] = next >> 8;
 270     p[2] = total_len;
 271     p[3] = total_len >> 8;
 272     index += 4;
 273
 274     /* write packet data */
 275     while (size > 0) {
 276         if (index <= s->stop)
 277             avail = s->stop - index;
 278         else
 279             avail = 0;
 280         len = size;
 281         if (len > avail)
 282             len = avail;
 283         memcpy(s->mem + index, buf, len);
 284         buf += len;
 285         index += len;
 286         if (index == s->stop)
 287             index = s->start;
 288         size -= len;
 289     }
 290     s->curpag = next >> 8;
 291
 292     /* now we can signal we have received something */
 293     s->isr |= ENISR_RX;
 294     ne2000_update_irq(s);
 295
 296     return size_;
 297 }
 298
 299 void ne2000_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 300 {
 301     NE2000State *s = opaque;
 302     int offset, page, index;
 303
 304     addr &= 0xf;
 305 #ifdef DEBUG_NE2000
 306     printf("NE2000: write addr=0x%x val=0x%02x\n", addr, val);
 307 #endif
 308     if (addr == E8390_CMD) {
 309         /* control register */
 310         s->cmd = val;
 311         if (!(val & E8390_STOP)) { /* START bit makes no sense on RTL8029... */
 312             s->isr &= ~ENISR_RESET;
 313             /* test specific case: zero length transfer */
 314             if ((val & (E8390_RREAD | E8390_RWRITE)) &&
 315                 s->rcnt == 0) {
 316                 s->isr |= ENISR_RDC;
 317                 ne2000_update_irq(s);
 318             }
 319             if (val & E8390_TRANS) {
 320                 index = (s->tpsr << 8);
 321                 /* XXX: next 2 lines are a hack to make netware 3.11 work */
 322                 if (index >= NE2000_PMEM_END)
 323                     index -= NE2000_PMEM_SIZE;
 324                 /* fail safe: check range on the transmitted length  */
 325                 if (index + s->tcnt <= NE2000_PMEM_END) {
 326                     qemu_send_packet(&s->nic->nc, s->mem + index, s->tcnt);
 327                 }
 328                 /* signal end of transfer */
 329                 s->tsr = ENTSR_PTX;
 330                 s->isr |= ENISR_TX;
 331                 s->cmd &= ~E8390_TRANS;
 332                 ne2000_update_irq(s);
 333             }
 334         }
 335     } else {
 336         page = s->cmd >> 6;
 337         offset = addr | (page << 4);
 338         switch(offset) {
 339         case EN0_STARTPG:
 340             s->start = val << 8;
 341             break;
 342         case EN0_STOPPG:
 343             s->stop = val << 8;
 344             break;
 345         case EN0_BOUNDARY:
 346             s->boundary = val;
 347             break;
 348         case EN0_IMR:
 349             s->imr = val;
 350             ne2000_update_irq(s);
 351             break;
 352         case EN0_TPSR:
 353             s->tpsr = val;
 354             break;
 355         case EN0_TCNTLO:
 356             s->tcnt = (s->tcnt & 0xff00) | val;
 357             break;
 358         case EN0_TCNTHI:
 359             s->tcnt = (s->tcnt & 0x00ff) | (val << 8);
 360             break;
 361         case EN0_RSARLO:
 362             s->rsar = (s->rsar & 0xff00) | val;
 363             break;
 364         case EN0_RSARHI:
 365             s->rsar = (s->rsar & 0x00ff) | (val << 8);
 366             break;
 367         case EN0_RCNTLO:
 368             s->rcnt = (s->rcnt & 0xff00) | val;
 369             break;
 370         case EN0_RCNTHI:
 371             s->rcnt = (s->rcnt & 0x00ff) | (val << 8);
 372             break;
 373         case EN0_RXCR:
 374             s->rxcr = val;
 375             break;
 376         case EN0_DCFG:
 377             s->dcfg = val;
 378             break;
 379         case EN0_ISR:
 380             s->isr &= ~(val & 0x7f);
 381             ne2000_update_irq(s);
 382             break;
 383         case EN1_PHYS ... EN1_PHYS + 5:
 384             s->phys[offset - EN1_PHYS] = val;
 385             break;
 386         case EN1_CURPAG:
 387             s->curpag = val;
 388             break;
 389         case EN1_MULT ... EN1_MULT + 7:
 390             s->mult[offset - EN1_MULT] = val;
 391             break;
 392         }
 393     }
 394 }
 395
 396 uint32_t ne2000_ioport_read(void *opaque, uint32_t addr)
 397 {
 398     NE2000State *s = opaque;
 399     int offset, page, ret;
 400
 401     addr &= 0xf;
 402     if (addr == E8390_CMD) {
 403         ret = s->cmd;
 404     } else {
 405         page = s->cmd >> 6;
 406         offset = addr | (page << 4);
 407         switch(offset) {
 408         case EN0_TSR:
 409             ret = s->tsr;
 410             break;
 411         case EN0_BOUNDARY:
 412             ret = s->boundary;
 413             break;
 414         case EN0_ISR:
 415             ret = s->isr;
 416             break;
 417         case EN0_RSARLO:
 418             ret = s->rsar & 0x00ff;
 419             break;
 420         case EN0_RSARHI:
 421             ret = s->rsar >> 8;
 422             break;
 423         case EN1_PHYS ... EN1_PHYS + 5:
 424             ret = s->phys[offset - EN1_PHYS];
 425             break;
 426         case EN1_CURPAG:
 427             ret = s->curpag;
 428             break;
 429         case EN1_MULT ... EN1_MULT + 7:
 430             ret = s->mult[offset - EN1_MULT];
 431             break;
 432         case EN0_RSR:
 433             ret = s->rsr;
 434             break;
 435         case EN2_STARTPG:
 436             ret = s->start >> 8;
 437             break;
 438         case EN2_STOPPG:
 439             ret = s->stop >> 8;
 440             break;
 441         case EN0_RTL8029ID0:
 442             ret = 0x50;
 443             break;
 444         case EN0_RTL8029ID1:
 445             ret = 0x43;
 446             break;
 447         case EN3_CONFIG0:
 448             ret = 0;            /* 10baseT media */
 449             break;
 450         case EN3_CONFIG2:
 451             ret = 0x40;         /* 10baseT active */
 452             break;
 453         case EN3_CONFIG3:
 454             ret = 0x40;         /* Full duplex */
 455             break;
 456         default:
 457             ret = 0x00;
 458             break;
 459         }
 460     }
 461 #ifdef DEBUG_NE2000
 462     printf("NE2000: read addr=0x%x val=%02x\n", addr, ret);
 463 #endif
 464     return ret;
 465 }
 466
 467 static inline void ne2000_mem_writeb(NE2000State *s, uint32_t addr,
 468                                      uint32_t val)
 469 {
 470     if (addr < 32 ||
 471         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 472         s->mem[addr] = val;
 473     }
 474 }
 475
 476 static inline void ne2000_mem_writew(NE2000State *s, uint32_t addr,
 477                                      uint32_t val)
 478 {
 479     addr &= ~1; /* XXX: check exact behaviour if not even */
 480     if (addr < 32 ||
 481         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 482         *(uint16_t *)(s->mem + addr) = cpu_to_le16(val);
 483     }
 484 }
 485
 486 static inline void ne2000_mem_writel(NE2000State *s, uint32_t addr,
 487                                      uint32_t val)
 488 {
 489     addr &= ~1; /* XXX: check exact behaviour if not even */
 490     if (addr < 32 ||
 491         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 492         cpu_to_le32wu((uint32_t *)(s->mem + addr), val);
 493     }
 494 }
 495
 496 static inline uint32_t ne2000_mem_readb(NE2000State *s, uint32_t addr)
 497 {
 498     if (addr < 32 ||
 499         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 500         return s->mem[addr];
 501     } else {
 502         return 0xff;
 503     }
 504 }
 505
 506 static inline uint32_t ne2000_mem_readw(NE2000State *s, uint32_t addr)
 507 {
 508     addr &= ~1; /* XXX: check exact behaviour if not even */
 509     if (addr < 32 ||
 510         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 511         return le16_to_cpu(*(uint16_t *)(s->mem + addr));
 512     } else {
 513         return 0xffff;
 514     }
 515 }
 516
 517 static inline uint32_t ne2000_mem_readl(NE2000State *s, uint32_t addr)
 518 {
 519     addr &= ~1; /* XXX: check exact behaviour if not even */
 520     if (addr < 32 ||
 521         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 522         return le32_to_cpupu((uint32_t *)(s->mem + addr));
 523     } else {
 524         return 0xffffffff;
 525     }
 526 }
 527
 528 static inline void ne2000_dma_update(NE2000State *s, int len)
 529 {
 530     s->rsar += len;
 531     /* wrap */
 532     /* XXX: check what to do if rsar > stop */
 533     if (s->rsar == s->stop)
 534         s->rsar = s->start;
 535
 536     if (s->rcnt <= len) {
 537         s->rcnt = 0;
 538         /* signal end of transfer */
 539         s->isr |= ENISR_RDC;
 540         ne2000_update_irq(s);
 541     } else {
 542         s->rcnt -= len;
 543     }
 544 }
 545
 546 void ne2000_asic_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 547 {
 548     NE2000State *s = opaque;
 549
 550 #ifdef DEBUG_NE2000
 551     printf("NE2000: asic write val=0x%04x\n", val);
 552 #endif
 553     if (s->rcnt == 0)
 554         return;
 555     if (s->dcfg & 0x01) {
 556         /* 16 bit access */
 557         ne2000_mem_writew(s, s->rsar, val);
 558         ne2000_dma_update(s, 2);
 559     } else {
 560         /* 8 bit access */
 561         ne2000_mem_writeb(s, s->rsar, val);
 562         ne2000_dma_update(s, 1);
 563     }
 564 }
 565
 566 uint32_t ne2000_asic_ioport_read(void *opaque, uint32_t addr)
 567 {
 568     NE2000State *s = opaque;
 569     int ret;
 570
 571     if (s->dcfg & 0x01) {
 572         /* 16 bit access */
 573         ret = ne2000_mem_readw(s, s->rsar);
 574         ne2000_dma_update(s, 2);
 575     } else {
 576         /* 8 bit access */
 577         ret = ne2000_mem_readb(s, s->rsar);
 578         ne2000_dma_update(s, 1);
 579     }
 580 #ifdef DEBUG_NE2000
 581     printf("NE2000: asic read val=0x%04x\n", ret);
 582 #endif
 583     return ret;
 584 }
 585
 586 static void ne2000_asic_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
 587 {
 588     NE2000State *s = opaque;
 589
 590 #ifdef DEBUG_NE2000
 591     printf("NE2000: asic writel val=0x%04x\n", val);
 592 #endif
 593     if (s->rcnt == 0)
 594         return;
 595     /* 32 bit access */
 596     ne2000_mem_writel(s, s->rsar, val);
 597     ne2000_dma_update(s, 4);
 598 }
 599
 600 static uint32_t ne2000_asic_ioport_readl(void *opaque, uint32_t addr)
 601 {
 602     NE2000State *s = opaque;
 603     int ret;
 604
 605     /* 32 bit access */
 606     ret = ne2000_mem_readl(s, s->rsar);
 607     ne2000_dma_update(s, 4);
 608 #ifdef DEBUG_NE2000
 609     printf("NE2000: asic readl val=0x%04x\n", ret);
 610 #endif
 611     return ret;
 612 }
 613
 614 void ne2000_reset_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 615 {
 616     /* nothing to do (end of reset pulse) */
 617 }
 618
 619 uint32_t ne2000_reset_ioport_read(void *opaque, uint32_t addr)
 620 {
 621     NE2000State *s = opaque;
 622     ne2000_reset(s);
 623     return 0;
 624 }
 625
 626 static int ne2000_post_load(void* opaque, int version_id)
 627 {
 628     NE2000State* s = opaque;
 629
 630     if (version_id < 2) {
 631         s->rxcr = 0x0c;
 632     }
 633     return 0;
 634 }
 635
 636 const VMStateDescription vmstate_ne2000 = {
 637     .name = "ne2000",
 638     .version_id = 2,
 639     .minimum_version_id = 0,
 640     .minimum_version_id_old = 0,
 641     .post_load = ne2000_post_load,
 642     .fields      = (VMStateField []) {
 643         VMSTATE_UINT8_V(rxcr, NE2000State, 2),
 644         VMSTATE_UINT8(cmd, NE2000State),
 645         VMSTATE_UINT32(start, NE2000State),
 646         VMSTATE_UINT32(stop, NE2000State),
 647         VMSTATE_UINT8(boundary, NE2000State),
 648         VMSTATE_UINT8(tsr, NE2000State),
 649         VMSTATE_UINT8(tpsr, NE2000State),
 650         VMSTATE_UINT16(tcnt, NE2000State),
 651         VMSTATE_UINT16(rcnt, NE2000State),
 652         VMSTATE_UINT32(rsar, NE2000State),
 653         VMSTATE_UINT8(rsr, NE2000State),
 654         VMSTATE_UINT8(isr, NE2000State),
 655         VMSTATE_UINT8(dcfg, NE2000State),
 656         VMSTATE_UINT8(imr, NE2000State),
 657         VMSTATE_BUFFER(phys, NE2000State),
 658         VMSTATE_UINT8(curpag, NE2000State),
 659         VMSTATE_BUFFER(mult, NE2000State),
 660         VMSTATE_UNUSED(4), /* was irq */
 661         VMSTATE_BUFFER(mem, NE2000State),
 662         VMSTATE_END_OF_LIST()
 663     }
 664 };
 665
 666 static const VMStateDescription vmstate_pci_ne2000 = {
 667     .name = "ne2000",
 668     .version_id = 3,
 669     .minimum_version_id = 3,
 670     .minimum_version_id_old = 3,
 671     .fields      = (VMStateField []) {
 672         VMSTATE_PCI_DEVICE(dev, PCINE2000State),
 673         VMSTATE_STRUCT(ne2000, PCINE2000State, 0, vmstate_ne2000, NE2000State),
 674         VMSTATE_END_OF_LIST()
 675     }
 676 };
 677
 678 /***********************************************************/
 679 /* PCI NE2000 definitions */
 680
 681 static void ne2000_map(PCIDevice *pci_dev, int region_num,
 682                        pcibus_t addr, pcibus_t size, int type)
 683 {
 684     PCINE2000State *d = DO_UPCAST(PCINE2000State, dev, pci_dev);
 685     NE2000State *s = &d->ne2000;
 686
 687     register_ioport_write(addr, 16, 1, ne2000_ioport_write, s);
 688     register_ioport_read(addr, 16, 1, ne2000_ioport_read, s);
 689
 690     register_ioport_write(addr + 0x10, 1, 1, ne2000_asic_ioport_write, s);
 691     register_ioport_read(addr + 0x10, 1, 1, ne2000_asic_ioport_read, s);
 692     register_ioport_write(addr + 0x10, 2, 2, ne2000_asic_ioport_write, s);
 693     register_ioport_read(addr + 0x10, 2, 2, ne2000_asic_ioport_read, s);
 694     register_ioport_write(addr + 0x10, 4, 4, ne2000_asic_ioport_writel, s);
 695     register_ioport_read(addr + 0x10, 4, 4, ne2000_asic_ioport_readl, s);
 696
 697     register_ioport_write(addr + 0x1f, 1, 1, ne2000_reset_ioport_write, s);
 698     register_ioport_read(addr + 0x1f, 1, 1, ne2000_reset_ioport_read, s);
 699 }
 700
 701 static void ne2000_cleanup(VLANClientState *nc)
 702 {
 703     NE2000State *s = DO_UPCAST(NICState, nc, nc)->opaque;
 704
 705     s->nic = NULL;
 706 }
 707
 708 static NetClientInfo net_ne2000_info = {
 709     .type = NET_CLIENT_TYPE_NIC,
 710     .size = sizeof(NICState),
 711     .can_receive = ne2000_can_receive,
 712     .receive = ne2000_receive,
 713     .cleanup = ne2000_cleanup,
 714 };
 715
 716 static int pci_ne2000_init(PCIDevice *pci_dev)
 717 {
 718     PCINE2000State *d = DO_UPCAST(PCINE2000State, dev, pci_dev);
 719     NE2000State *s;
 720     uint8_t *pci_conf;
 721
 722     pci_conf = d->dev.config;
 723     pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_REALTEK);
 724     pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_REALTEK_8029);
 725     pci_config_set_class(pci_conf, PCI_CLASS_NETWORK_ETHERNET);
 726     /* TODO: RST# value should be 0. PCI spec 6.2.4 */
 727     pci_conf[PCI_INTERRUPT_PIN] = 1; // interrupt pin 0
 728
 729     pci_register_bar(&d->dev, 0, 0x100,
 730                            PCI_BASE_ADDRESS_SPACE_IO, ne2000_map);
 731     s = &d->ne2000;
 732     s->irq = d->dev.irq[0];
 733
 734     qemu_macaddr_default_if_unset(&s->c.macaddr);
 735     ne2000_reset(s);
 736
 737     s->nic = qemu_new_nic(&net_ne2000_info, &s->c,
 738                           pci_dev->qdev.info->name, pci_dev->qdev.id, s);
 739     qemu_format_nic_info_str(&s->nic->nc, s->c.macaddr.a);
 740
 741     if (!pci_dev->qdev.hotplugged) {
 742         static int loaded = 0;
 743         if (!loaded) {
 744             rom_add_option("pxe-ne2k_pci.bin");
 745             loaded = 1;
 746         }
 747     }
 748
 749     return 0;
 750 }
 751
 752 static int pci_ne2000_exit(PCIDevice *pci_dev)
 753 {
 754     PCINE2000State *d = DO_UPCAST(PCINE2000State, dev, pci_dev);
 755     NE2000State *s = &d->ne2000;
 756
 757     qemu_del_vlan_client(&s->nic->nc);
 758     return 0;
 759 }
 760
 761 static PCIDeviceInfo ne2000_info = {
 762     .qdev.name  = "ne2k_pci",
 763     .qdev.size  = sizeof(PCINE2000State),
 764     .qdev.vmsd  = &vmstate_pci_ne2000,
 765     .init       = pci_ne2000_init,
 766     .exit       = pci_ne2000_exit,
 767     .qdev.props = (Property[]) {
 768         DEFINE_NIC_PROPERTIES(PCINE2000State, ne2000.c),
 769         DEFINE_PROP_END_OF_LIST(),
 770     }
 771 };
 772
 773 static void ne2000_register_devices(void)
 774 {
 775     pci_qdev_register(&ne2000_info);
 776 }
 777
 778 device_init(ne2000_register_devices)