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 #include "sysemu.h"
  30
  31 /* debug NE2000 card */
  32 //#define DEBUG_NE2000
  33
  34 #define MAX_ETH_FRAME_SIZE 1514
  35
  36 #define E8390_CMD       0x00  /* The command register (for all pages) */
  37 /* Page 0 register offsets. */
  38 #define EN0_CLDALO      0x01    /* Low byte of current local dma addr  RD */
  39 #define EN0_STARTPG     0x01    /* Starting page of ring bfr WR */
  40 #define EN0_CLDAHI      0x02    /* High byte of current local dma addr  RD */
  41 #define EN0_STOPPG      0x02    /* Ending page +1 of ring bfr WR */
  42 #define EN0_BOUNDARY    0x03    /* Boundary page of ring bfr RD WR */
  43 #define EN0_TSR         0x04    /* Transmit status reg RD */
  44 #define EN0_TPSR        0x04    /* Transmit starting page WR */
  45 #define EN0_NCR         0x05    /* Number of collision reg RD */
  46 #define EN0_TCNTLO      0x05    /* Low  byte of tx byte count WR */
  47 #define EN0_FIFO        0x06    /* FIFO RD */
  48 #define EN0_TCNTHI      0x06    /* High byte of tx byte count WR */
  49 #define EN0_ISR         0x07    /* Interrupt status reg RD WR */
  50 #define EN0_CRDALO      0x08    /* low byte of current remote dma address RD */
  51 #define EN0_RSARLO      0x08    /* Remote start address reg 0 */
  52 #define EN0_CRDAHI      0x09    /* high byte, current remote dma address RD */
  53 #define EN0_RSARHI      0x09    /* Remote start address reg 1 */
  54 #define EN0_RCNTLO      0x0a    /* Remote byte count reg WR */
  55 #define EN0_RTL8029ID0  0x0a    /* Realtek ID byte #1 RD */
  56 #define EN0_RCNTHI      0x0b    /* Remote byte count reg WR */
  57 #define EN0_RTL8029ID1  0x0b    /* Realtek ID byte #2 RD */
  58 #define EN0_RSR         0x0c    /* rx status reg RD */
  59 #define EN0_RXCR        0x0c    /* RX configuration reg WR */
  60 #define EN0_TXCR        0x0d    /* TX configuration reg WR */
  61 #define EN0_COUNTER0    0x0d    /* Rcv alignment error counter RD */
  62 #define EN0_DCFG        0x0e    /* Data configuration reg WR */
  63 #define EN0_COUNTER1    0x0e    /* Rcv CRC error counter RD */
  64 #define EN0_IMR         0x0f    /* Interrupt mask reg WR */
  65 #define EN0_COUNTER2    0x0f    /* Rcv missed frame error counter RD */
  66
  67 #define EN1_PHYS        0x11
  68 #define EN1_CURPAG      0x17
  69 #define EN1_MULT        0x18
  70
  71 #define EN2_STARTPG     0x21    /* Starting page of ring bfr RD */
  72 #define EN2_STOPPG      0x22    /* Ending page +1 of ring bfr RD */
  73
  74 #define EN3_CONFIG0     0x33
  75 #define EN3_CONFIG1     0x34
  76 #define EN3_CONFIG2     0x35
  77 #define EN3_CONFIG3     0x36
  78
  79 /*  Register accessed at EN_CMD, the 8390 base addr.  */
  80 #define E8390_STOP      0x01    /* Stop and reset the chip */
  81 #define E8390_START     0x02    /* Start the chip, clear reset */
  82 #define E8390_TRANS     0x04    /* Transmit a frame */
  83 #define E8390_RREAD     0x08    /* Remote read */
  84 #define E8390_RWRITE    0x10    /* Remote write  */
  85 #define E8390_NODMA     0x20    /* Remote DMA */
  86 #define E8390_PAGE0     0x00    /* Select page chip registers */
  87 #define E8390_PAGE1     0x40    /* using the two high-order bits */
  88 #define E8390_PAGE2     0x80    /* Page 3 is invalid. */
  89
  90 /* Bits in EN0_ISR - Interrupt status register */
  91 #define ENISR_RX        0x01    /* Receiver, no error */
  92 #define ENISR_TX        0x02    /* Transmitter, no error */
  93 #define ENISR_RX_ERR    0x04    /* Receiver, with error */
  94 #define ENISR_TX_ERR    0x08    /* Transmitter, with error */
  95 #define ENISR_OVER      0x10    /* Receiver overwrote the ring */
  96 #define ENISR_COUNTERS  0x20    /* Counters need emptying */
  97 #define ENISR_RDC       0x40    /* remote dma complete */
  98 #define ENISR_RESET     0x80    /* Reset completed */
  99 #define ENISR_ALL       0x3f    /* Interrupts we will enable */
 100
 101 /* Bits in received packet status byte and EN0_RSR*/
 102 #define ENRSR_RXOK      0x01    /* Received a good packet */
 103 #define ENRSR_CRC       0x02    /* CRC error */
 104 #define ENRSR_FAE       0x04    /* frame alignment error */
 105 #define ENRSR_FO        0x08    /* FIFO overrun */
 106 #define ENRSR_MPA       0x10    /* missed pkt */
 107 #define ENRSR_PHY       0x20    /* physical/multicast address */
 108 #define ENRSR_DIS       0x40    /* receiver disable. set in monitor mode */
 109 #define ENRSR_DEF       0x80    /* deferring */
 110
 111 /* Transmitted packet status, EN0_TSR. */
 112 #define ENTSR_PTX 0x01  /* Packet transmitted without error */
 113 #define ENTSR_ND  0x02  /* The transmit wasn't deferred. */
 114 #define ENTSR_COL 0x04  /* The transmit collided at least once. */
 115 #define ENTSR_ABT 0x08  /* The transmit collided 16 times, and was deferred. */
 116 #define ENTSR_CRS 0x10  /* The carrier sense was lost. */
 117 #define ENTSR_FU  0x20  /* A "FIFO underrun" occurred during transmit. */
 118 #define ENTSR_CDH 0x40  /* The collision detect "heartbeat" signal was lost. */
 119 #define ENTSR_OWC 0x80  /* There was an out-of-window collision. */
 120
 121 typedef struct PCINE2000State {
 122     PCIDevice dev;
 123     NE2000State ne2000;
 124 } PCINE2000State;
 125
 126 void ne2000_reset(NE2000State *s)
 127 {
 128     int i;
 129
 130     s->isr = ENISR_RESET;
 131     memcpy(s->mem, &s->c.macaddr, 6);
 132     s->mem[14] = 0x57;
 133     s->mem[15] = 0x57;
 134
 135     /* duplicate prom data */
 136     for(i = 15;i >= 0; i--) {
 137         s->mem[2 * i] = s->mem[i];
 138         s->mem[2 * i + 1] = s->mem[i];
 139     }
 140 }
 141
 142 static void ne2000_update_irq(NE2000State *s)
 143 {
 144     int isr;
 145     isr = (s->isr & s->imr) & 0x7f;
 146 #if defined(DEBUG_NE2000)
 147     printf("NE2000: Set IRQ to %d (%02x %02x)\n",
 148            isr ? 1 : 0, s->isr, s->imr);
 149 #endif
 150     qemu_set_irq(s->irq, (isr != 0));
 151 }
 152
 153 #define POLYNOMIAL 0x04c11db6
 154
 155 /* From FreeBSD */
 156 /* XXX: optimize */
 157 static int compute_mcast_idx(const uint8_t *ep)
 158 {
 159     uint32_t crc;
 160     int carry, i, j;
 161     uint8_t b;
 162
 163     crc = 0xffffffff;
 164     for (i = 0; i < 6; i++) {
 165         b = *ep++;
 166         for (j = 0; j < 8; j++) {
 167             carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
 168             crc <<= 1;
 169             b >>= 1;
 170             if (carry)
 171                 crc = ((crc ^ POLYNOMIAL) | carry);
 172         }
 173     }
 174     return (crc >> 26);
 175 }
 176
 177 static int ne2000_buffer_full(NE2000State *s)
 178 {
 179     int avail, index, boundary;
 180
 181     index = s->curpag << 8;
 182     boundary = s->boundary << 8;
 183     if (index < boundary)
 184         avail = boundary - index;
 185     else
 186         avail = (s->stop - s->start) - (index - boundary);
 187     if (avail < (MAX_ETH_FRAME_SIZE + 4))
 188         return 1;
 189     return 0;
 190 }
 191
 192 int ne2000_can_receive(VLANClientState *nc)
 193 {
 194     NE2000State *s = DO_UPCAST(NICState, nc, nc)->opaque;
 195
 196     if (s->cmd & E8390_STOP)
 197         return 1;
 198     return !ne2000_buffer_full(s);
 199 }
 200
 201 #define MIN_BUF_SIZE 60
 202
 203 ssize_t ne2000_receive(VLANClientState *nc, const uint8_t *buf, size_t size_)
 204 {
 205     NE2000State *s = DO_UPCAST(NICState, nc, nc)->opaque;
 206     int size = size_;
 207     uint8_t *p;
 208     unsigned int total_len, next, avail, len, index, mcast_idx;
 209     uint8_t buf1[60];
 210     static const uint8_t broadcast_macaddr[6] =
 211         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 212
 213 #if defined(DEBUG_NE2000)
 214     printf("NE2000: received len=%d\n", size);
 215 #endif
 216
 217     if (s->cmd & E8390_STOP || ne2000_buffer_full(s))
 218         return -1;
 219
 220     /* XXX: check this */
 221     if (s->rxcr & 0x10) {
 222         /* promiscuous: receive all */
 223     } else {
 224         if (!memcmp(buf,  broadcast_macaddr, 6)) {
 225             /* broadcast address */
 226             if (!(s->rxcr & 0x04))
 227                 return size;
 228         } else if (buf[0] & 0x01) {
 229             /* multicast */
 230             if (!(s->rxcr & 0x08))
 231                 return size;
 232             mcast_idx = compute_mcast_idx(buf);
 233             if (!(s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7))))
 234                 return size;
 235         } else if (s->mem[0] == buf[0] &&
 236                    s->mem[2] == buf[1] &&
 237                    s->mem[4] == buf[2] &&
 238                    s->mem[6] == buf[3] &&
 239                    s->mem[8] == buf[4] &&
 240                    s->mem[10] == buf[5]) {
 241             /* match */
 242         } else {
 243             return size;
 244         }
 245     }
 246
 247
 248     /* if too small buffer, then expand it */
 249     if (size < MIN_BUF_SIZE) {
 250         memcpy(buf1, buf, size);
 251         memset(buf1 + size, 0, MIN_BUF_SIZE - size);
 252         buf = buf1;
 253         size = MIN_BUF_SIZE;
 254     }
 255
 256     index = s->curpag << 8;
 257     /* 4 bytes for header */
 258     total_len = size + 4;
 259     /* address for next packet (4 bytes for CRC) */
 260     next = index + ((total_len + 4 + 255) & ~0xff);
 261     if (next >= s->stop)
 262         next -= (s->stop - s->start);
 263     /* prepare packet header */
 264     p = s->mem + index;
 265     s->rsr = ENRSR_RXOK; /* receive status */
 266     /* XXX: check this */
 267     if (buf[0] & 0x01)
 268         s->rsr |= ENRSR_PHY;
 269     p[0] = s->rsr;
 270     p[1] = next >> 8;
 271     p[2] = total_len;
 272     p[3] = total_len >> 8;
 273     index += 4;
 274
 275     /* write packet data */
 276     while (size > 0) {
 277         if (index <= s->stop)
 278             avail = s->stop - index;
 279         else
 280             avail = 0;
 281         len = size;
 282         if (len > avail)
 283             len = avail;
 284         memcpy(s->mem + index, buf, len);
 285         buf += len;
 286         index += len;
 287         if (index == s->stop)
 288             index = s->start;
 289         size -= len;
 290     }
 291     s->curpag = next >> 8;
 292
 293     /* now we can signal we have received something */
 294     s->isr |= ENISR_RX;
 295     ne2000_update_irq(s);
 296
 297     return size_;
 298 }
 299
 300 static void ne2000_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 301 {
 302     NE2000State *s = opaque;
 303     int offset, page, index;
 304
 305     addr &= 0xf;
 306 #ifdef DEBUG_NE2000
 307     printf("NE2000: write addr=0x%x val=0x%02x\n", addr, val);
 308 #endif
 309     if (addr == E8390_CMD) {
 310         /* control register */
 311         s->cmd = val;
 312         if (!(val & E8390_STOP)) { /* START bit makes no sense on RTL8029... */
 313             s->isr &= ~ENISR_RESET;
 314             /* test specific case: zero length transfer */
 315             if ((val & (E8390_RREAD | E8390_RWRITE)) &&
 316                 s->rcnt == 0) {
 317                 s->isr |= ENISR_RDC;
 318                 ne2000_update_irq(s);
 319             }
 320             if (val & E8390_TRANS) {
 321                 index = (s->tpsr << 8);
 322                 /* XXX: next 2 lines are a hack to make netware 3.11 work */
 323                 if (index >= NE2000_PMEM_END)
 324                     index -= NE2000_PMEM_SIZE;
 325                 /* fail safe: check range on the transmitted length  */
 326                 if (index + s->tcnt <= NE2000_PMEM_END) {
 327                     qemu_send_packet(&s->nic->nc, s->mem + index, s->tcnt);
 328                 }
 329                 /* signal end of transfer */
 330                 s->tsr = ENTSR_PTX;
 331                 s->isr |= ENISR_TX;
 332                 s->cmd &= ~E8390_TRANS;
 333                 ne2000_update_irq(s);
 334             }
 335         }
 336     } else {
 337         page = s->cmd >> 6;
 338         offset = addr | (page << 4);
 339         switch(offset) {
 340         case EN0_STARTPG:
 341             s->start = val << 8;
 342             break;
 343         case EN0_STOPPG:
 344             s->stop = val << 8;
 345             break;
 346         case EN0_BOUNDARY:
 347             s->boundary = val;
 348             break;
 349         case EN0_IMR:
 350             s->imr = val;
 351             ne2000_update_irq(s);
 352             break;
 353         case EN0_TPSR:
 354             s->tpsr = val;
 355             break;
 356         case EN0_TCNTLO:
 357             s->tcnt = (s->tcnt & 0xff00) | val;
 358             break;
 359         case EN0_TCNTHI:
 360             s->tcnt = (s->tcnt & 0x00ff) | (val << 8);
 361             break;
 362         case EN0_RSARLO:
 363             s->rsar = (s->rsar & 0xff00) | val;
 364             break;
 365         case EN0_RSARHI:
 366             s->rsar = (s->rsar & 0x00ff) | (val << 8);
 367             break;
 368         case EN0_RCNTLO:
 369             s->rcnt = (s->rcnt & 0xff00) | val;
 370             break;
 371         case EN0_RCNTHI:
 372             s->rcnt = (s->rcnt & 0x00ff) | (val << 8);
 373             break;
 374         case EN0_RXCR:
 375             s->rxcr = val;
 376             break;
 377         case EN0_DCFG:
 378             s->dcfg = val;
 379             break;
 380         case EN0_ISR:
 381             s->isr &= ~(val & 0x7f);
 382             ne2000_update_irq(s);
 383             break;
 384         case EN1_PHYS ... EN1_PHYS + 5:
 385             s->phys[offset - EN1_PHYS] = val;
 386             break;
 387         case EN1_CURPAG:
 388             s->curpag = val;
 389             break;
 390         case EN1_MULT ... EN1_MULT + 7:
 391             s->mult[offset - EN1_MULT] = val;
 392             break;
 393         }
 394     }
 395 }
 396
 397 static uint32_t ne2000_ioport_read(void *opaque, uint32_t addr)
 398 {
 399     NE2000State *s = opaque;
 400     int offset, page, ret;
 401
 402     addr &= 0xf;
 403     if (addr == E8390_CMD) {
 404         ret = s->cmd;
 405     } else {
 406         page = s->cmd >> 6;
 407         offset = addr | (page << 4);
 408         switch(offset) {
 409         case EN0_TSR:
 410             ret = s->tsr;
 411             break;
 412         case EN0_BOUNDARY:
 413             ret = s->boundary;
 414             break;
 415         case EN0_ISR:
 416             ret = s->isr;
 417             break;
 418         case EN0_RSARLO:
 419             ret = s->rsar & 0x00ff;
 420             break;
 421         case EN0_RSARHI:
 422             ret = s->rsar >> 8;
 423             break;
 424         case EN1_PHYS ... EN1_PHYS + 5:
 425             ret = s->phys[offset - EN1_PHYS];
 426             break;
 427         case EN1_CURPAG:
 428             ret = s->curpag;
 429             break;
 430         case EN1_MULT ... EN1_MULT + 7:
 431             ret = s->mult[offset - EN1_MULT];
 432             break;
 433         case EN0_RSR:
 434             ret = s->rsr;
 435             break;
 436         case EN2_STARTPG:
 437             ret = s->start >> 8;
 438             break;
 439         case EN2_STOPPG:
 440             ret = s->stop >> 8;
 441             break;
 442         case EN0_RTL8029ID0:
 443             ret = 0x50;
 444             break;
 445         case EN0_RTL8029ID1:
 446             ret = 0x43;
 447             break;
 448         case EN3_CONFIG0:
 449             ret = 0;            /* 10baseT media */
 450             break;
 451         case EN3_CONFIG2:
 452             ret = 0x40;         /* 10baseT active */
 453             break;
 454         case EN3_CONFIG3:
 455             ret = 0x40;         /* Full duplex */
 456             break;
 457         default:
 458             ret = 0x00;
 459             break;
 460         }
 461     }
 462 #ifdef DEBUG_NE2000
 463     printf("NE2000: read addr=0x%x val=%02x\n", addr, ret);
 464 #endif
 465     return ret;
 466 }
 467
 468 static inline void ne2000_mem_writeb(NE2000State *s, uint32_t addr,
 469                                      uint32_t val)
 470 {
 471     if (addr < 32 ||
 472         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 473         s->mem[addr] = val;
 474     }
 475 }
 476
 477 static inline void ne2000_mem_writew(NE2000State *s, uint32_t addr,
 478                                      uint32_t val)
 479 {
 480     addr &= ~1; /* XXX: check exact behaviour if not even */
 481     if (addr < 32 ||
 482         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 483         *(uint16_t *)(s->mem + addr) = cpu_to_le16(val);
 484     }
 485 }
 486
 487 static inline void ne2000_mem_writel(NE2000State *s, uint32_t addr,
 488                                      uint32_t val)
 489 {
 490     addr &= ~1; /* XXX: check exact behaviour if not even */
 491     if (addr < 32 ||
 492         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 493         cpu_to_le32wu((uint32_t *)(s->mem + addr), val);
 494     }
 495 }
 496
 497 static inline uint32_t ne2000_mem_readb(NE2000State *s, uint32_t addr)
 498 {
 499     if (addr < 32 ||
 500         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 501         return s->mem[addr];
 502     } else {
 503         return 0xff;
 504     }
 505 }
 506
 507 static inline uint32_t ne2000_mem_readw(NE2000State *s, uint32_t addr)
 508 {
 509     addr &= ~1; /* XXX: check exact behaviour if not even */
 510     if (addr < 32 ||
 511         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 512         return le16_to_cpu(*(uint16_t *)(s->mem + addr));
 513     } else {
 514         return 0xffff;
 515     }
 516 }
 517
 518 static inline uint32_t ne2000_mem_readl(NE2000State *s, uint32_t addr)
 519 {
 520     addr &= ~1; /* XXX: check exact behaviour if not even */
 521     if (addr < 32 ||
 522         (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
 523         return le32_to_cpupu((uint32_t *)(s->mem + addr));
 524     } else {
 525         return 0xffffffff;
 526     }
 527 }
 528
 529 static inline void ne2000_dma_update(NE2000State *s, int len)
 530 {
 531     s->rsar += len;
 532     /* wrap */
 533     /* XXX: check what to do if rsar > stop */
 534     if (s->rsar == s->stop)
 535         s->rsar = s->start;
 536
 537     if (s->rcnt <= len) {
 538         s->rcnt = 0;
 539         /* signal end of transfer */
 540         s->isr |= ENISR_RDC;
 541         ne2000_update_irq(s);
 542     } else {
 543         s->rcnt -= len;
 544     }
 545 }
 546
 547 static void ne2000_asic_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 548 {
 549     NE2000State *s = opaque;
 550
 551 #ifdef DEBUG_NE2000
 552     printf("NE2000: asic write val=0x%04x\n", val);
 553 #endif
 554     if (s->rcnt == 0)
 555         return;
 556     if (s->dcfg & 0x01) {
 557         /* 16 bit access */
 558         ne2000_mem_writew(s, s->rsar, val);
 559         ne2000_dma_update(s, 2);
 560     } else {
 561         /* 8 bit access */
 562         ne2000_mem_writeb(s, s->rsar, val);
 563         ne2000_dma_update(s, 1);
 564     }
 565 }
 566
 567 static uint32_t ne2000_asic_ioport_read(void *opaque, uint32_t addr)
 568 {
 569     NE2000State *s = opaque;
 570     int ret;
 571
 572     if (s->dcfg & 0x01) {
 573         /* 16 bit access */
 574         ret = ne2000_mem_readw(s, s->rsar);
 575         ne2000_dma_update(s, 2);
 576     } else {
 577         /* 8 bit access */
 578         ret = ne2000_mem_readb(s, s->rsar);
 579         ne2000_dma_update(s, 1);
 580     }
 581 #ifdef DEBUG_NE2000
 582     printf("NE2000: asic read val=0x%04x\n", ret);
 583 #endif
 584     return ret;
 585 }
 586
 587 static void ne2000_asic_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
 588 {
 589     NE2000State *s = opaque;
 590
 591 #ifdef DEBUG_NE2000
 592     printf("NE2000: asic writel val=0x%04x\n", val);
 593 #endif
 594     if (s->rcnt == 0)
 595         return;
 596     /* 32 bit access */
 597     ne2000_mem_writel(s, s->rsar, val);
 598     ne2000_dma_update(s, 4);
 599 }
 600
 601 static uint32_t ne2000_asic_ioport_readl(void *opaque, uint32_t addr)
 602 {
 603     NE2000State *s = opaque;
 604     int ret;
 605
 606     /* 32 bit access */
 607     ret = ne2000_mem_readl(s, s->rsar);
 608     ne2000_dma_update(s, 4);
 609 #ifdef DEBUG_NE2000
 610     printf("NE2000: asic readl val=0x%04x\n", ret);
 611 #endif
 612     return ret;
 613 }
 614
 615 static void ne2000_reset_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 616 {
 617     /* nothing to do (end of reset pulse) */
 618 }
 619
 620 static uint32_t ne2000_reset_ioport_read(void *opaque, uint32_t addr)
 621 {
 622     NE2000State *s = opaque;
 623     ne2000_reset(s);
 624     return 0;
 625 }
 626
 627 static int ne2000_post_load(void* opaque, int version_id)
 628 {
 629     NE2000State* s = opaque;
 630
 631     if (version_id < 2) {
 632         s->rxcr = 0x0c;
 633     }
 634     return 0;
 635 }
 636
 637 const VMStateDescription vmstate_ne2000 = {
 638     .name = "ne2000",
 639     .version_id = 2,
 640     .minimum_version_id = 0,
 641     .minimum_version_id_old = 0,
 642     .post_load = ne2000_post_load,
 643     .fields      = (VMStateField []) {
 644         VMSTATE_UINT8_V(rxcr, NE2000State, 2),
 645         VMSTATE_UINT8(cmd, NE2000State),
 646         VMSTATE_UINT32(start, NE2000State),
 647         VMSTATE_UINT32(stop, NE2000State),
 648         VMSTATE_UINT8(boundary, NE2000State),
 649         VMSTATE_UINT8(tsr, NE2000State),
 650         VMSTATE_UINT8(tpsr, NE2000State),
 651         VMSTATE_UINT16(tcnt, NE2000State),
 652         VMSTATE_UINT16(rcnt, NE2000State),
 653         VMSTATE_UINT32(rsar, NE2000State),
 654         VMSTATE_UINT8(rsr, NE2000State),
 655         VMSTATE_UINT8(isr, NE2000State),
 656         VMSTATE_UINT8(dcfg, NE2000State),
 657         VMSTATE_UINT8(imr, NE2000State),
 658         VMSTATE_BUFFER(phys, NE2000State),
 659         VMSTATE_UINT8(curpag, NE2000State),
 660         VMSTATE_BUFFER(mult, NE2000State),
 661         VMSTATE_UNUSED(4), /* was irq */
 662         VMSTATE_BUFFER(mem, NE2000State),
 663         VMSTATE_END_OF_LIST()
 664     }
 665 };
 666
 667 static const VMStateDescription vmstate_pci_ne2000 = {
 668     .name = "ne2000",
 669     .version_id = 3,
 670     .minimum_version_id = 3,
 671     .minimum_version_id_old = 3,
 672     .fields      = (VMStateField []) {
 673         VMSTATE_PCI_DEVICE(dev, PCINE2000State),
 674         VMSTATE_STRUCT(ne2000, PCINE2000State, 0, vmstate_ne2000, NE2000State),
 675         VMSTATE_END_OF_LIST()
 676     }
 677 };
 678
 679 static uint64_t ne2000_read(void *opaque, target_phys_addr_t addr,
 680                             unsigned size)
 681 {
 682     NE2000State *s = opaque;
 683
 684     if (addr < 0x10 && size == 1) {
 685         return ne2000_ioport_read(s, addr);
 686     } else if (addr == 0x10) {
 687         if (size <= 2) {
 688             return ne2000_asic_ioport_read(s, addr);
 689         } else {
 690             return ne2000_asic_ioport_readl(s, addr);
 691         }
 692     } else if (addr == 0x1f && size == 1) {
 693         return ne2000_reset_ioport_read(s, addr);
 694     }
 695     return ((uint64_t)1 << (size * 8)) - 1;
 696 }
 697
 698 static void ne2000_write(void *opaque, target_phys_addr_t addr,
 699                          uint64_t data, unsigned size)
 700 {
 701     NE2000State *s = opaque;
 702
 703     if (addr < 0x10 && size == 1) {
 704         return ne2000_ioport_write(s, addr, data);
 705     } else if (addr == 0x10) {
 706         if (size <= 2) {
 707             return ne2000_asic_ioport_write(s, addr, data);
 708         } else {
 709             return ne2000_asic_ioport_writel(s, addr, data);
 710         }
 711     } else if (addr == 0x1f && size == 1) {
 712         return ne2000_reset_ioport_write(s, addr, data);
 713     }
 714 }
 715
 716 static const MemoryRegionOps ne2000_ops = {
 717     .read = ne2000_read,
 718     .write = ne2000_write,
 719     .endianness = DEVICE_NATIVE_ENDIAN,
 720 };
 721
 722 /***********************************************************/
 723 /* PCI NE2000 definitions */
 724
 725 void ne2000_setup_io(NE2000State *s, unsigned size)
 726 {
 727     memory_region_init_io(&s->io, &ne2000_ops, s, "ne2000", size);
 728 }
 729
 730 static void ne2000_cleanup(VLANClientState *nc)
 731 {
 732     NE2000State *s = DO_UPCAST(NICState, nc, nc)->opaque;
 733
 734     s->nic = NULL;
 735 }
 736
 737 static NetClientInfo net_ne2000_info = {
 738     .type = NET_CLIENT_TYPE_NIC,
 739     .size = sizeof(NICState),
 740     .can_receive = ne2000_can_receive,
 741     .receive = ne2000_receive,
 742     .cleanup = ne2000_cleanup,
 743 };
 744
 745 static int pci_ne2000_init(PCIDevice *pci_dev)
 746 {
 747     PCINE2000State *d = DO_UPCAST(PCINE2000State, dev, pci_dev);
 748     NE2000State *s;
 749     uint8_t *pci_conf;
 750
 751     pci_conf = d->dev.config;
 752     /* TODO: RST# value should be 0. PCI spec 6.2.4 */
 753     pci_conf[PCI_INTERRUPT_PIN] = 1; // interrupt pin 0
 754
 755     s = &d->ne2000;
 756     ne2000_setup_io(s, 0x100);
 757     pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
 758     s->irq = d->dev.irq[0];
 759
 760     qemu_macaddr_default_if_unset(&s->c.macaddr);
 761     ne2000_reset(s);
 762
 763     s->nic = qemu_new_nic(&net_ne2000_info, &s->c,
 764                           pci_dev->qdev.info->name, pci_dev->qdev.id, s);
 765     qemu_format_nic_info_str(&s->nic->nc, s->c.macaddr.a);
 766
 767     if (!pci_dev->qdev.hotplugged) {
 768         static int loaded = 0;
 769         if (!loaded) {
 770             rom_add_option("pxe-ne2k_pci.rom", -1);
 771             loaded = 1;
 772         }
 773     }
 774
 775     add_boot_device_path(s->c.bootindex, &pci_dev->qdev, "/ethernet-phy@0");
 776
 777     return 0;
 778 }
 779
 780 static int pci_ne2000_exit(PCIDevice *pci_dev)
 781 {
 782     PCINE2000State *d = DO_UPCAST(PCINE2000State, dev, pci_dev);
 783     NE2000State *s = &d->ne2000;
 784
 785     memory_region_destroy(&s->io);
 786     qemu_del_vlan_client(&s->nic->nc);
 787     return 0;
 788 }
 789
 790 static PCIDeviceInfo ne2000_info = {
 791     .qdev.name  = "ne2k_pci",
 792     .qdev.size  = sizeof(PCINE2000State),
 793     .qdev.vmsd  = &vmstate_pci_ne2000,
 794     .init       = pci_ne2000_init,
 795     .exit       = pci_ne2000_exit,
 796     .vendor_id  = PCI_VENDOR_ID_REALTEK,
 797     .device_id  = PCI_DEVICE_ID_REALTEK_8029,
 798     .class_id   = PCI_CLASS_NETWORK_ETHERNET,
 799     .qdev.props = (Property[]) {
 800         DEFINE_NIC_PROPERTIES(PCINE2000State, ne2000.c),
 801         DEFINE_PROP_END_OF_LIST(),
 802     }
 803 };
 804
 805 static void ne2000_register_devices(void)
 806 {
 807     pci_qdev_register(&ne2000_info);
 808 }
 809
 810 device_init(ne2000_register_devices)