hw/net/xilinx_axienet.c

   1 /*
   2  * QEMU model of Xilinx AXI-Ethernet.
   3  *
   4  * Copyright (c) 2011 Edgar E. Iglesias.
   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 #include "hw/sysbus.h"
  26 #include "qemu/log.h"
  27 #include "net/net.h"
  28 #include "net/checksum.h"
  29 #include "qapi/qmp/qerror.h"
  30
  31 #include "hw/stream.h"
  32
  33 #define DPHY(x)
  34
  35 #define TYPE_XILINX_AXI_ENET "xlnx.axi-ethernet"
  36 #define TYPE_XILINX_AXI_ENET_DATA_STREAM "xilinx-axienet-data-stream"
  37 #define TYPE_XILINX_AXI_ENET_CONTROL_STREAM "xilinx-axienet-control-stream"
  38
  39 #define XILINX_AXI_ENET(obj) \
  40      OBJECT_CHECK(XilinxAXIEnet, (obj), TYPE_XILINX_AXI_ENET)
  41
  42 #define XILINX_AXI_ENET_DATA_STREAM(obj) \
  43      OBJECT_CHECK(XilinxAXIEnetStreamSlave, (obj),\
  44      TYPE_XILINX_AXI_ENET_DATA_STREAM)
  45
  46 #define XILINX_AXI_ENET_CONTROL_STREAM(obj) \
  47      OBJECT_CHECK(XilinxAXIEnetStreamSlave, (obj),\
  48      TYPE_XILINX_AXI_ENET_CONTROL_STREAM)
  49
  50 /* Advertisement control register. */
  51 #define ADVERTISE_10HALF        0x0020  /* Try for 10mbps half-duplex  */
  52 #define ADVERTISE_10FULL        0x0040  /* Try for 10mbps full-duplex  */
  53 #define ADVERTISE_100HALF       0x0080  /* Try for 100mbps half-duplex */
  54 #define ADVERTISE_100FULL       0x0100  /* Try for 100mbps full-duplex */
  55
  56 #define CONTROL_PAYLOAD_WORDS 5
  57 #define CONTROL_PAYLOAD_SIZE (CONTROL_PAYLOAD_WORDS * (sizeof(uint32_t)))
  58
  59 struct PHY {
  60     uint32_t regs[32];
  61
  62     int link;
  63
  64     unsigned int (*read)(struct PHY *phy, unsigned int req);
  65     void (*write)(struct PHY *phy, unsigned int req,
  66                   unsigned int data);
  67 };
  68
  69 static unsigned int tdk_read(struct PHY *phy, unsigned int req)
  70 {
  71     int regnum;
  72     unsigned r = 0;
  73
  74     regnum = req & 0x1f;
  75
  76     switch (regnum) {
  77         case 1:
  78             if (!phy->link) {
  79                 break;
  80             }
  81             /* MR1.  */
  82             /* Speeds and modes.  */
  83             r |= (1 << 13) | (1 << 14);
  84             r |= (1 << 11) | (1 << 12);
  85             r |= (1 << 5); /* Autoneg complete.  */
  86             r |= (1 << 3); /* Autoneg able.  */
  87             r |= (1 << 2); /* link.  */
  88             r |= (1 << 1); /* link.  */
  89             break;
  90         case 5:
  91             /* Link partner ability.
  92                We are kind; always agree with whatever best mode
  93                the guest advertises.  */
  94             r = 1 << 14; /* Success.  */
  95             /* Copy advertised modes.  */
  96             r |= phy->regs[4] & (15 << 5);
  97             /* Autoneg support.  */
  98             r |= 1;
  99             break;
 100         case 17:
 101             /* Marvel PHY on many xilinx boards.  */
 102             r = 0x8000; /* 1000Mb  */
 103             break;
 104         case 18:
 105             {
 106                 /* Diagnostics reg.  */
 107                 int duplex = 0;
 108                 int speed_100 = 0;
 109
 110                 if (!phy->link) {
 111                     break;
 112                 }
 113
 114                 /* Are we advertising 100 half or 100 duplex ? */
 115                 speed_100 = !!(phy->regs[4] & ADVERTISE_100HALF);
 116                 speed_100 |= !!(phy->regs[4] & ADVERTISE_100FULL);
 117
 118                 /* Are we advertising 10 duplex or 100 duplex ? */
 119                 duplex = !!(phy->regs[4] & ADVERTISE_100FULL);
 120                 duplex |= !!(phy->regs[4] & ADVERTISE_10FULL);
 121                 r = (speed_100 << 10) | (duplex << 11);
 122             }
 123             break;
 124
 125         default:
 126             r = phy->regs[regnum];
 127             break;
 128     }
 129     DPHY(qemu_log("\n%s %x = reg[%d]\n", __func__, r, regnum));
 130     return r;
 131 }
 132
 133 static void
 134 tdk_write(struct PHY *phy, unsigned int req, unsigned int data)
 135 {
 136     int regnum;
 137
 138     regnum = req & 0x1f;
 139     DPHY(qemu_log("%s reg[%d] = %x\n", __func__, regnum, data));
 140     switch (regnum) {
 141         default:
 142             phy->regs[regnum] = data;
 143             break;
 144     }
 145 }
 146
 147 static void
 148 tdk_init(struct PHY *phy)
 149 {
 150     phy->regs[0] = 0x3100;
 151     /* PHY Id.  */
 152     phy->regs[2] = 0x0300;
 153     phy->regs[3] = 0xe400;
 154     /* Autonegotiation advertisement reg.  */
 155     phy->regs[4] = 0x01E1;
 156     phy->link = 1;
 157
 158     phy->read = tdk_read;
 159     phy->write = tdk_write;
 160 }
 161
 162 struct MDIOBus {
 163     /* bus.  */
 164     int mdc;
 165     int mdio;
 166
 167     /* decoder.  */
 168     enum {
 169         PREAMBLE,
 170         SOF,
 171         OPC,
 172         ADDR,
 173         REQ,
 174         TURNAROUND,
 175         DATA
 176     } state;
 177     unsigned int drive;
 178
 179     unsigned int cnt;
 180     unsigned int addr;
 181     unsigned int opc;
 182     unsigned int req;
 183     unsigned int data;
 184
 185     struct PHY *devs[32];
 186 };
 187
 188 static void
 189 mdio_attach(struct MDIOBus *bus, struct PHY *phy, unsigned int addr)
 190 {
 191     bus->devs[addr & 0x1f] = phy;
 192 }
 193
 194 #ifdef USE_THIS_DEAD_CODE
 195 static void
 196 mdio_detach(struct MDIOBus *bus, struct PHY *phy, unsigned int addr)
 197 {
 198     bus->devs[addr & 0x1f] = NULL;
 199 }
 200 #endif
 201
 202 static uint16_t mdio_read_req(struct MDIOBus *bus, unsigned int addr,
 203                   unsigned int reg)
 204 {
 205     struct PHY *phy;
 206     uint16_t data;
 207
 208     phy = bus->devs[addr];
 209     if (phy && phy->read) {
 210         data = phy->read(phy, reg);
 211     } else {
 212         data = 0xffff;
 213     }
 214     DPHY(qemu_log("%s addr=%d reg=%d data=%x\n", __func__, addr, reg, data));
 215     return data;
 216 }
 217
 218 static void mdio_write_req(struct MDIOBus *bus, unsigned int addr,
 219                unsigned int reg, uint16_t data)
 220 {
 221     struct PHY *phy;
 222
 223     DPHY(qemu_log("%s addr=%d reg=%d data=%x\n", __func__, addr, reg, data));
 224     phy = bus->devs[addr];
 225     if (phy && phy->write) {
 226         phy->write(phy, reg, data);
 227     }
 228 }
 229
 230 #define DENET(x)
 231
 232 #define R_RAF      (0x000 / 4)
 233 enum {
 234     RAF_MCAST_REJ = (1 << 1),
 235     RAF_BCAST_REJ = (1 << 2),
 236     RAF_EMCF_EN = (1 << 12),
 237     RAF_NEWFUNC_EN = (1 << 11)
 238 };
 239
 240 #define R_IS       (0x00C / 4)
 241 enum {
 242     IS_HARD_ACCESS_COMPLETE = 1,
 243     IS_AUTONEG = (1 << 1),
 244     IS_RX_COMPLETE = (1 << 2),
 245     IS_RX_REJECT = (1 << 3),
 246     IS_TX_COMPLETE = (1 << 5),
 247     IS_RX_DCM_LOCK = (1 << 6),
 248     IS_MGM_RDY = (1 << 7),
 249     IS_PHY_RST_DONE = (1 << 8),
 250 };
 251
 252 #define R_IP       (0x010 / 4)
 253 #define R_IE       (0x014 / 4)
 254 #define R_UAWL     (0x020 / 4)
 255 #define R_UAWU     (0x024 / 4)
 256 #define R_PPST     (0x030 / 4)
 257 enum {
 258     PPST_LINKSTATUS = (1 << 0),
 259     PPST_PHY_LINKSTATUS = (1 << 7),
 260 };
 261
 262 #define R_STATS_RX_BYTESL (0x200 / 4)
 263 #define R_STATS_RX_BYTESH (0x204 / 4)
 264 #define R_STATS_TX_BYTESL (0x208 / 4)
 265 #define R_STATS_TX_BYTESH (0x20C / 4)
 266 #define R_STATS_RXL       (0x290 / 4)
 267 #define R_STATS_RXH       (0x294 / 4)
 268 #define R_STATS_RX_BCASTL (0x2a0 / 4)
 269 #define R_STATS_RX_BCASTH (0x2a4 / 4)
 270 #define R_STATS_RX_MCASTL (0x2a8 / 4)
 271 #define R_STATS_RX_MCASTH (0x2ac / 4)
 272
 273 #define R_RCW0     (0x400 / 4)
 274 #define R_RCW1     (0x404 / 4)
 275 enum {
 276     RCW1_VLAN = (1 << 27),
 277     RCW1_RX   = (1 << 28),
 278     RCW1_FCS  = (1 << 29),
 279     RCW1_JUM  = (1 << 30),
 280     RCW1_RST  = (1 << 31),
 281 };
 282
 283 #define R_TC       (0x408 / 4)
 284 enum {
 285     TC_VLAN = (1 << 27),
 286     TC_TX   = (1 << 28),
 287     TC_FCS  = (1 << 29),
 288     TC_JUM  = (1 << 30),
 289     TC_RST  = (1 << 31),
 290 };
 291
 292 #define R_EMMC     (0x410 / 4)
 293 enum {
 294     EMMC_LINKSPEED_10MB = (0 << 30),
 295     EMMC_LINKSPEED_100MB = (1 << 30),
 296     EMMC_LINKSPEED_1000MB = (2 << 30),
 297 };
 298
 299 #define R_PHYC     (0x414 / 4)
 300
 301 #define R_MC       (0x500 / 4)
 302 #define MC_EN      (1 << 6)
 303
 304 #define R_MCR      (0x504 / 4)
 305 #define R_MWD      (0x508 / 4)
 306 #define R_MRD      (0x50c / 4)
 307 #define R_MIS      (0x600 / 4)
 308 #define R_MIP      (0x620 / 4)
 309 #define R_MIE      (0x640 / 4)
 310 #define R_MIC      (0x640 / 4)
 311
 312 #define R_UAW0     (0x700 / 4)
 313 #define R_UAW1     (0x704 / 4)
 314 #define R_FMI      (0x708 / 4)
 315 #define R_AF0      (0x710 / 4)
 316 #define R_AF1      (0x714 / 4)
 317 #define R_MAX      (0x34 / 4)
 318
 319 /* Indirect registers.  */
 320 struct TEMAC  {
 321     struct MDIOBus mdio_bus;
 322     struct PHY phy;
 323
 324     void *parent;
 325 };
 326
 327 typedef struct XilinxAXIEnetStreamSlave XilinxAXIEnetStreamSlave;
 328 typedef struct XilinxAXIEnet XilinxAXIEnet;
 329
 330 struct XilinxAXIEnetStreamSlave {
 331     Object parent;
 332
 333     struct XilinxAXIEnet *enet;
 334 } ;
 335
 336 struct XilinxAXIEnet {
 337     SysBusDevice busdev;
 338     MemoryRegion iomem;
 339     qemu_irq irq;
 340     StreamSlave *tx_data_dev;
 341     StreamSlave *tx_control_dev;
 342     XilinxAXIEnetStreamSlave rx_data_dev;
 343     XilinxAXIEnetStreamSlave rx_control_dev;
 344     NICState *nic;
 345     NICConf conf;
 346
 347
 348     uint32_t c_rxmem;
 349     uint32_t c_txmem;
 350     uint32_t c_phyaddr;
 351
 352     struct TEMAC TEMAC;
 353
 354     /* MII regs.  */
 355     union {
 356         uint32_t regs[4];
 357         struct {
 358             uint32_t mc;
 359             uint32_t mcr;
 360             uint32_t mwd;
 361             uint32_t mrd;
 362         };
 363     } mii;
 364
 365     struct {
 366         uint64_t rx_bytes;
 367         uint64_t tx_bytes;
 368
 369         uint64_t rx;
 370         uint64_t rx_bcast;
 371         uint64_t rx_mcast;
 372     } stats;
 373
 374     /* Receive configuration words.  */
 375     uint32_t rcw[2];
 376     /* Transmit config.  */
 377     uint32_t tc;
 378     uint32_t emmc;
 379     uint32_t phyc;
 380
 381     /* Unicast Address Word.  */
 382     uint32_t uaw[2];
 383     /* Unicast address filter used with extended mcast.  */
 384     uint32_t ext_uaw[2];
 385     uint32_t fmi;
 386
 387     uint32_t regs[R_MAX];
 388
 389     /* Multicast filter addrs.  */
 390     uint32_t maddr[4][2];
 391     /* 32K x 1 lookup filter.  */
 392     uint32_t ext_mtable[1024];
 393
 394     uint32_t hdr[CONTROL_PAYLOAD_WORDS];
 395
 396     uint8_t *rxmem;
 397     uint32_t rxsize;
 398     uint32_t rxpos;
 399
 400     uint8_t rxapp[CONTROL_PAYLOAD_SIZE];
 401     uint32_t rxappsize;
 402 };
 403
 404 static void axienet_rx_reset(XilinxAXIEnet *s)
 405 {
 406     s->rcw[1] = RCW1_JUM | RCW1_FCS | RCW1_RX | RCW1_VLAN;
 407 }
 408
 409 static void axienet_tx_reset(XilinxAXIEnet *s)
 410 {
 411     s->tc = TC_JUM | TC_TX | TC_VLAN;
 412 }
 413
 414 static inline int axienet_rx_resetting(XilinxAXIEnet *s)
 415 {
 416     return s->rcw[1] & RCW1_RST;
 417 }
 418
 419 static inline int axienet_rx_enabled(XilinxAXIEnet *s)
 420 {
 421     return s->rcw[1] & RCW1_RX;
 422 }
 423
 424 static inline int axienet_extmcf_enabled(XilinxAXIEnet *s)
 425 {
 426     return !!(s->regs[R_RAF] & RAF_EMCF_EN);
 427 }
 428
 429 static inline int axienet_newfunc_enabled(XilinxAXIEnet *s)
 430 {
 431     return !!(s->regs[R_RAF] & RAF_NEWFUNC_EN);
 432 }
 433
 434 static void xilinx_axienet_reset(DeviceState *d)
 435 {
 436     XilinxAXIEnet *s = XILINX_AXI_ENET(d);
 437
 438     axienet_rx_reset(s);
 439     axienet_tx_reset(s);
 440
 441     s->regs[R_PPST] = PPST_LINKSTATUS | PPST_PHY_LINKSTATUS;
 442     s->regs[R_IS] = IS_AUTONEG | IS_RX_DCM_LOCK | IS_MGM_RDY | IS_PHY_RST_DONE;
 443
 444     s->emmc = EMMC_LINKSPEED_100MB;
 445 }
 446
 447 static void enet_update_irq(XilinxAXIEnet *s)
 448 {
 449     s->regs[R_IP] = s->regs[R_IS] & s->regs[R_IE];
 450     qemu_set_irq(s->irq, !!s->regs[R_IP]);
 451 }
 452
 453 static uint64_t enet_read(void *opaque, hwaddr addr, unsigned size)
 454 {
 455     XilinxAXIEnet *s = opaque;
 456     uint32_t r = 0;
 457     addr >>= 2;
 458
 459     switch (addr) {
 460         case R_RCW0:
 461         case R_RCW1:
 462             r = s->rcw[addr & 1];
 463             break;
 464
 465         case R_TC:
 466             r = s->tc;
 467             break;
 468
 469         case R_EMMC:
 470             r = s->emmc;
 471             break;
 472
 473         case R_PHYC:
 474             r = s->phyc;
 475             break;
 476
 477         case R_MCR:
 478             r = s->mii.regs[addr & 3] | (1 << 7); /* Always ready.  */
 479             break;
 480
 481         case R_STATS_RX_BYTESL:
 482         case R_STATS_RX_BYTESH:
 483             r = s->stats.rx_bytes >> (32 * (addr & 1));
 484             break;
 485
 486         case R_STATS_TX_BYTESL:
 487         case R_STATS_TX_BYTESH:
 488             r = s->stats.tx_bytes >> (32 * (addr & 1));
 489             break;
 490
 491         case R_STATS_RXL:
 492         case R_STATS_RXH:
 493             r = s->stats.rx >> (32 * (addr & 1));
 494             break;
 495         case R_STATS_RX_BCASTL:
 496         case R_STATS_RX_BCASTH:
 497             r = s->stats.rx_bcast >> (32 * (addr & 1));
 498             break;
 499         case R_STATS_RX_MCASTL:
 500         case R_STATS_RX_MCASTH:
 501             r = s->stats.rx_mcast >> (32 * (addr & 1));
 502             break;
 503
 504         case R_MC:
 505         case R_MWD:
 506         case R_MRD:
 507             r = s->mii.regs[addr & 3];
 508             break;
 509
 510         case R_UAW0:
 511         case R_UAW1:
 512             r = s->uaw[addr & 1];
 513             break;
 514
 515         case R_UAWU:
 516         case R_UAWL:
 517             r = s->ext_uaw[addr & 1];
 518             break;
 519
 520         case R_FMI:
 521             r = s->fmi;
 522             break;
 523
 524         case R_AF0:
 525         case R_AF1:
 526             r = s->maddr[s->fmi & 3][addr & 1];
 527             break;
 528
 529         case 0x8000 ... 0x83ff:
 530             r = s->ext_mtable[addr - 0x8000];
 531             break;
 532
 533         default:
 534             if (addr < ARRAY_SIZE(s->regs)) {
 535                 r = s->regs[addr];
 536             }
 537             DENET(qemu_log("%s addr=" TARGET_FMT_plx " v=%x\n",
 538                             __func__, addr * 4, r));
 539             break;
 540     }
 541     return r;
 542 }
 543
 544 static void enet_write(void *opaque, hwaddr addr,
 545                        uint64_t value, unsigned size)
 546 {
 547     XilinxAXIEnet *s = opaque;
 548     struct TEMAC *t = &s->TEMAC;
 549
 550     addr >>= 2;
 551     switch (addr) {
 552         case R_RCW0:
 553         case R_RCW1:
 554             s->rcw[addr & 1] = value;
 555             if ((addr & 1) && value & RCW1_RST) {
 556                 axienet_rx_reset(s);
 557             } else {
 558                 qemu_flush_queued_packets(qemu_get_queue(s->nic));
 559             }
 560             break;
 561
 562         case R_TC:
 563             s->tc = value;
 564             if (value & TC_RST) {
 565                 axienet_tx_reset(s);
 566             }
 567             break;
 568
 569         case R_EMMC:
 570             s->emmc = value;
 571             break;
 572
 573         case R_PHYC:
 574             s->phyc = value;
 575             break;
 576
 577         case R_MC:
 578              value &= ((1 << 7) - 1);
 579
 580              /* Enable the MII.  */
 581              if (value & MC_EN) {
 582                  unsigned int miiclkdiv = value & ((1 << 6) - 1);
 583                  if (!miiclkdiv) {
 584                      qemu_log("AXIENET: MDIO enabled but MDIOCLK is zero!\n");
 585                  }
 586              }
 587              s->mii.mc = value;
 588              break;
 589
 590         case R_MCR: {
 591              unsigned int phyaddr = (value >> 24) & 0x1f;
 592              unsigned int regaddr = (value >> 16) & 0x1f;
 593              unsigned int op = (value >> 14) & 3;
 594              unsigned int initiate = (value >> 11) & 1;
 595
 596              if (initiate) {
 597                  if (op == 1) {
 598                      mdio_write_req(&t->mdio_bus, phyaddr, regaddr, s->mii.mwd);
 599                  } else if (op == 2) {
 600                      s->mii.mrd = mdio_read_req(&t->mdio_bus, phyaddr, regaddr);
 601                  } else {
 602                      qemu_log("AXIENET: invalid MDIOBus OP=%d\n", op);
 603                  }
 604              }
 605              s->mii.mcr = value;
 606              break;
 607         }
 608
 609         case R_MWD:
 610         case R_MRD:
 611              s->mii.regs[addr & 3] = value;
 612              break;
 613
 614
 615         case R_UAW0:
 616         case R_UAW1:
 617             s->uaw[addr & 1] = value;
 618             break;
 619
 620         case R_UAWL:
 621         case R_UAWU:
 622             s->ext_uaw[addr & 1] = value;
 623             break;
 624
 625         case R_FMI:
 626             s->fmi = value;
 627             break;
 628
 629         case R_AF0:
 630         case R_AF1:
 631             s->maddr[s->fmi & 3][addr & 1] = value;
 632             break;
 633
 634         case R_IS:
 635             s->regs[addr] &= ~value;
 636             break;
 637
 638         case 0x8000 ... 0x83ff:
 639             s->ext_mtable[addr - 0x8000] = value;
 640             break;
 641
 642         default:
 643             DENET(qemu_log("%s addr=" TARGET_FMT_plx " v=%x\n",
 644                            __func__, addr * 4, (unsigned)value));
 645             if (addr < ARRAY_SIZE(s->regs)) {
 646                 s->regs[addr] = value;
 647             }
 648             break;
 649     }
 650     enet_update_irq(s);
 651 }
 652
 653 static const MemoryRegionOps enet_ops = {
 654     .read = enet_read,
 655     .write = enet_write,
 656     .endianness = DEVICE_LITTLE_ENDIAN,
 657 };
 658
 659 static int eth_can_rx(NetClientState *nc)
 660 {
 661     XilinxAXIEnet *s = qemu_get_nic_opaque(nc);
 662
 663     /* RX enabled?  */
 664     return !s->rxsize && !axienet_rx_resetting(s) && axienet_rx_enabled(s);
 665 }
 666
 667 static int enet_match_addr(const uint8_t *buf, uint32_t f0, uint32_t f1)
 668 {
 669     int match = 1;
 670
 671     if (memcmp(buf, &f0, 4)) {
 672         match = 0;
 673     }
 674
 675     if (buf[4] != (f1 & 0xff) || buf[5] != ((f1 >> 8) & 0xff)) {
 676         match = 0;
 677     }
 678
 679     return match;
 680 }
 681
 682 static void axienet_eth_rx_notify(void *opaque)
 683 {
 684     XilinxAXIEnet *s = XILINX_AXI_ENET(opaque);
 685
 686     while (s->rxappsize && stream_can_push(s->tx_control_dev,
 687                                            axienet_eth_rx_notify, s)) {
 688         size_t ret = stream_push(s->tx_control_dev,
 689                                  (void *)s->rxapp + CONTROL_PAYLOAD_SIZE
 690                                  - s->rxappsize, s->rxappsize);
 691         s->rxappsize -= ret;
 692     }
 693
 694     while (s->rxsize && stream_can_push(s->tx_data_dev,
 695                                         axienet_eth_rx_notify, s)) {
 696         size_t ret = stream_push(s->tx_data_dev, (void *)s->rxmem + s->rxpos,
 697                                  s->rxsize);
 698         s->rxsize -= ret;
 699         s->rxpos += ret;
 700         if (!s->rxsize) {
 701             s->regs[R_IS] |= IS_RX_COMPLETE;
 702         }
 703     }
 704     enet_update_irq(s);
 705 }
 706
 707 static ssize_t eth_rx(NetClientState *nc, const uint8_t *buf, size_t size)
 708 {
 709     XilinxAXIEnet *s = qemu_get_nic_opaque(nc);
 710     static const unsigned char sa_bcast[6] = {0xff, 0xff, 0xff,
 711                                               0xff, 0xff, 0xff};
 712     static const unsigned char sa_ipmcast[3] = {0x01, 0x00, 0x52};
 713     uint32_t app[CONTROL_PAYLOAD_WORDS] = {0};
 714     int promisc = s->fmi & (1 << 31);
 715     int unicast, broadcast, multicast, ip_multicast = 0;
 716     uint32_t csum32;
 717     uint16_t csum16;
 718     int i;
 719
 720     DENET(qemu_log("%s: %zd bytes\n", __func__, size));
 721
 722     unicast = ~buf[0] & 0x1;
 723     broadcast = memcmp(buf, sa_bcast, 6) == 0;
 724     multicast = !unicast && !broadcast;
 725     if (multicast && (memcmp(sa_ipmcast, buf, sizeof sa_ipmcast) == 0)) {
 726         ip_multicast = 1;
 727     }
 728
 729     /* Jumbo or vlan sizes ?  */
 730     if (!(s->rcw[1] & RCW1_JUM)) {
 731         if (size > 1518 && size <= 1522 && !(s->rcw[1] & RCW1_VLAN)) {
 732             return size;
 733         }
 734     }
 735
 736     /* Basic Address filters.  If you want to use the extended filters
 737        you'll generally have to place the ethernet mac into promiscuous mode
 738        to avoid the basic filtering from dropping most frames.  */
 739     if (!promisc) {
 740         if (unicast) {
 741             if (!enet_match_addr(buf, s->uaw[0], s->uaw[1])) {
 742                 return size;
 743             }
 744         } else {
 745             if (broadcast) {
 746                 /* Broadcast.  */
 747                 if (s->regs[R_RAF] & RAF_BCAST_REJ) {
 748                     return size;
 749                 }
 750             } else {
 751                 int drop = 1;
 752
 753                 /* Multicast.  */
 754                 if (s->regs[R_RAF] & RAF_MCAST_REJ) {
 755                     return size;
 756                 }
 757
 758                 for (i = 0; i < 4; i++) {
 759                     if (enet_match_addr(buf, s->maddr[i][0], s->maddr[i][1])) {
 760                         drop = 0;
 761                         break;
 762                     }
 763                 }
 764
 765                 if (drop) {
 766                     return size;
 767                 }
 768             }
 769         }
 770     }
 771
 772     /* Extended mcast filtering enabled?  */
 773     if (axienet_newfunc_enabled(s) && axienet_extmcf_enabled(s)) {
 774         if (unicast) {
 775             if (!enet_match_addr(buf, s->ext_uaw[0], s->ext_uaw[1])) {
 776                 return size;
 777             }
 778         } else {
 779             if (broadcast) {
 780                 /* Broadcast. ???  */
 781                 if (s->regs[R_RAF] & RAF_BCAST_REJ) {
 782                     return size;
 783                 }
 784             } else {
 785                 int idx, bit;
 786
 787                 /* Multicast.  */
 788                 if (!memcmp(buf, sa_ipmcast, 3)) {
 789                     return size;
 790                 }
 791
 792                 idx  = (buf[4] & 0x7f) << 8;
 793                 idx |= buf[5];
 794
 795                 bit = 1 << (idx & 0x1f);
 796                 idx >>= 5;
 797
 798                 if (!(s->ext_mtable[idx] & bit)) {
 799                     return size;
 800                 }
 801             }
 802         }
 803     }
 804
 805     if (size < 12) {
 806         s->regs[R_IS] |= IS_RX_REJECT;
 807         enet_update_irq(s);
 808         return -1;
 809     }
 810
 811     if (size > (s->c_rxmem - 4)) {
 812         size = s->c_rxmem - 4;
 813     }
 814
 815     memcpy(s->rxmem, buf, size);
 816     memset(s->rxmem + size, 0, 4); /* Clear the FCS.  */
 817
 818     if (s->rcw[1] & RCW1_FCS) {
 819         size += 4; /* fcs is inband.  */
 820     }
 821
 822     app[0] = 5 << 28;
 823     csum32 = net_checksum_add(size - 14, (uint8_t *)s->rxmem + 14);
 824     /* Fold it once.  */
 825     csum32 = (csum32 & 0xffff) + (csum32 >> 16);
 826     /* And twice to get rid of possible carries.  */
 827     csum16 = (csum32 & 0xffff) + (csum32 >> 16);
 828     app[3] = csum16;
 829     app[4] = size & 0xffff;
 830
 831     s->stats.rx_bytes += size;
 832     s->stats.rx++;
 833     if (multicast) {
 834         s->stats.rx_mcast++;
 835         app[2] |= 1 | (ip_multicast << 1);
 836     } else if (broadcast) {
 837         s->stats.rx_bcast++;
 838         app[2] |= 1 << 3;
 839     }
 840
 841     /* Good frame.  */
 842     app[2] |= 1 << 6;
 843
 844     s->rxsize = size;
 845     s->rxpos = 0;
 846     for (i = 0; i < ARRAY_SIZE(app); ++i) {
 847         app[i] = cpu_to_le32(app[i]);
 848     }
 849     s->rxappsize = CONTROL_PAYLOAD_SIZE;
 850     memcpy(s->rxapp, app, s->rxappsize);
 851     axienet_eth_rx_notify(s);
 852
 853     enet_update_irq(s);
 854     return size;
 855 }
 856
 857 static void eth_cleanup(NetClientState *nc)
 858 {
 859     /* FIXME.  */
 860     XilinxAXIEnet *s = qemu_get_nic_opaque(nc);
 861     g_free(s->rxmem);
 862     g_free(s);
 863 }
 864
 865 static size_t
 866 xilinx_axienet_control_stream_push(StreamSlave *obj, uint8_t *buf, size_t len)
 867 {
 868     int i;
 869     XilinxAXIEnetStreamSlave *cs = XILINX_AXI_ENET_CONTROL_STREAM(obj);
 870     XilinxAXIEnet *s = cs->enet;
 871
 872     if (len != CONTROL_PAYLOAD_SIZE) {
 873         hw_error("AXI Enet requires %d byte control stream payload\n",
 874                  (int)CONTROL_PAYLOAD_SIZE);
 875     }
 876
 877     memcpy(s->hdr, buf, len);
 878
 879     for (i = 0; i < ARRAY_SIZE(s->hdr); ++i) {
 880         s->hdr[i] = le32_to_cpu(s->hdr[i]);
 881     }
 882     return len;
 883 }
 884
 885 static size_t
 886 xilinx_axienet_data_stream_push(StreamSlave *obj, uint8_t *buf, size_t size)
 887 {
 888     XilinxAXIEnetStreamSlave *ds = XILINX_AXI_ENET_DATA_STREAM(obj);
 889     XilinxAXIEnet *s = ds->enet;
 890
 891     /* TX enable ?  */
 892     if (!(s->tc & TC_TX)) {
 893         return size;
 894     }
 895
 896     /* Jumbo or vlan sizes ?  */
 897     if (!(s->tc & TC_JUM)) {
 898         if (size > 1518 && size <= 1522 && !(s->tc & TC_VLAN)) {
 899             return size;
 900         }
 901     }
 902
 903     if (s->hdr[0] & 1) {
 904         unsigned int start_off = s->hdr[1] >> 16;
 905         unsigned int write_off = s->hdr[1] & 0xffff;
 906         uint32_t tmp_csum;
 907         uint16_t csum;
 908
 909         tmp_csum = net_checksum_add(size - start_off,
 910                                     (uint8_t *)buf + start_off);
 911         /* Accumulate the seed.  */
 912         tmp_csum += s->hdr[2] & 0xffff;
 913
 914         /* Fold the 32bit partial checksum.  */
 915         csum = net_checksum_finish(tmp_csum);
 916
 917         /* Writeback.  */
 918         buf[write_off] = csum >> 8;
 919         buf[write_off + 1] = csum & 0xff;
 920     }
 921
 922     qemu_send_packet(qemu_get_queue(s->nic), buf, size);
 923
 924     s->stats.tx_bytes += size;
 925     s->regs[R_IS] |= IS_TX_COMPLETE;
 926     enet_update_irq(s);
 927
 928     return size;
 929 }
 930
 931 static NetClientInfo net_xilinx_enet_info = {
 932     .type = NET_CLIENT_OPTIONS_KIND_NIC,
 933     .size = sizeof(NICState),
 934     .can_receive = eth_can_rx,
 935     .receive = eth_rx,
 936     .cleanup = eth_cleanup,
 937 };
 938
 939 static void xilinx_enet_realize(DeviceState *dev, Error **errp)
 940 {
 941     XilinxAXIEnet *s = XILINX_AXI_ENET(dev);
 942     XilinxAXIEnetStreamSlave *ds = XILINX_AXI_ENET_DATA_STREAM(&s->rx_data_dev);
 943     XilinxAXIEnetStreamSlave *cs = XILINX_AXI_ENET_CONTROL_STREAM(
 944                                                             &s->rx_control_dev);
 945     Error *local_errp = NULL;
 946
 947     object_property_add_link(OBJECT(ds), "enet", "xlnx.axi-ethernet",
 948                              (Object **) &ds->enet,
 949                              object_property_allow_set_link,
 950                              OBJ_PROP_LINK_UNREF_ON_RELEASE,
 951                              &local_errp);
 952     object_property_add_link(OBJECT(cs), "enet", "xlnx.axi-ethernet",
 953                              (Object **) &cs->enet,
 954                              object_property_allow_set_link,
 955                              OBJ_PROP_LINK_UNREF_ON_RELEASE,
 956                              &local_errp);
 957     if (local_errp) {
 958         goto xilinx_enet_realize_fail;
 959     }
 960     object_property_set_link(OBJECT(ds), OBJECT(s), "enet", &local_errp);
 961     object_property_set_link(OBJECT(cs), OBJECT(s), "enet", &local_errp);
 962     if (local_errp) {
 963         goto xilinx_enet_realize_fail;
 964     }
 965
 966     qemu_macaddr_default_if_unset(&s->conf.macaddr);
 967     s->nic = qemu_new_nic(&net_xilinx_enet_info, &s->conf,
 968                           object_get_typename(OBJECT(dev)), dev->id, s);
 969     qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
 970
 971     tdk_init(&s->TEMAC.phy);
 972     mdio_attach(&s->TEMAC.mdio_bus, &s->TEMAC.phy, s->c_phyaddr);
 973
 974     s->TEMAC.parent = s;
 975
 976     s->rxmem = g_malloc(s->c_rxmem);
 977     return;
 978
 979 xilinx_enet_realize_fail:
 980     if (!*errp) {
 981         *errp = local_errp;
 982     }
 983 }
 984
 985 static void xilinx_enet_init(Object *obj)
 986 {
 987     XilinxAXIEnet *s = XILINX_AXI_ENET(obj);
 988     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 989
 990     object_property_add_link(obj, "axistream-connected", TYPE_STREAM_SLAVE,
 991                              (Object **) &s->tx_data_dev,
 992                              qdev_prop_allow_set_link_before_realize,
 993                              OBJ_PROP_LINK_UNREF_ON_RELEASE,
 994                              &error_abort);
 995     object_property_add_link(obj, "axistream-control-connected",
 996                              TYPE_STREAM_SLAVE,
 997                              (Object **) &s->tx_control_dev,
 998                              qdev_prop_allow_set_link_before_realize,
 999                              OBJ_PROP_LINK_UNREF_ON_RELEASE,
1000                              &error_abort);
1001
1002     object_initialize(&s->rx_data_dev, sizeof(s->rx_data_dev),
1003                       TYPE_XILINX_AXI_ENET_DATA_STREAM);
1004     object_initialize(&s->rx_control_dev, sizeof(s->rx_control_dev),
1005                       TYPE_XILINX_AXI_ENET_CONTROL_STREAM);
1006     object_property_add_child(OBJECT(s), "axistream-connected-target",
1007                               (Object *)&s->rx_data_dev, &error_abort);
1008     object_property_add_child(OBJECT(s), "axistream-control-connected-target",
1009                               (Object *)&s->rx_control_dev, &error_abort);
1010
1011     sysbus_init_irq(sbd, &s->irq);
1012
1013     memory_region_init_io(&s->iomem, OBJECT(s), &enet_ops, s, "enet", 0x40000);
1014     sysbus_init_mmio(sbd, &s->iomem);
1015 }
1016
1017 static Property xilinx_enet_properties[] = {
1018     DEFINE_PROP_UINT32("phyaddr", XilinxAXIEnet, c_phyaddr, 7),
1019     DEFINE_PROP_UINT32("rxmem", XilinxAXIEnet, c_rxmem, 0x1000),
1020     DEFINE_PROP_UINT32("txmem", XilinxAXIEnet, c_txmem, 0x1000),
1021     DEFINE_NIC_PROPERTIES(XilinxAXIEnet, conf),
1022     DEFINE_PROP_END_OF_LIST(),
1023 };
1024
1025 static void xilinx_enet_class_init(ObjectClass *klass, void *data)
1026 {
1027     DeviceClass *dc = DEVICE_CLASS(klass);
1028
1029     dc->realize = xilinx_enet_realize;
1030     dc->props = xilinx_enet_properties;
1031     dc->reset = xilinx_axienet_reset;
1032 }
1033
1034 static void xilinx_enet_stream_class_init(ObjectClass *klass, void *data)
1035 {
1036     StreamSlaveClass *ssc = STREAM_SLAVE_CLASS(klass);
1037
1038     ssc->push = data;
1039 }
1040
1041 static const TypeInfo xilinx_enet_info = {
1042     .name          = TYPE_XILINX_AXI_ENET,
1043     .parent        = TYPE_SYS_BUS_DEVICE,
1044     .instance_size = sizeof(XilinxAXIEnet),
1045     .class_init    = xilinx_enet_class_init,
1046     .instance_init = xilinx_enet_init,
1047 };
1048
1049 static const TypeInfo xilinx_enet_data_stream_info = {
1050     .name          = TYPE_XILINX_AXI_ENET_DATA_STREAM,
1051     .parent        = TYPE_OBJECT,
1052     .instance_size = sizeof(struct XilinxAXIEnetStreamSlave),
1053     .class_init    = xilinx_enet_stream_class_init,
1054     .class_data    = xilinx_axienet_data_stream_push,
1055     .interfaces = (InterfaceInfo[]) {
1056             { TYPE_STREAM_SLAVE },
1057             { }
1058     }
1059 };
1060
1061 static const TypeInfo xilinx_enet_control_stream_info = {
1062     .name          = TYPE_XILINX_AXI_ENET_CONTROL_STREAM,
1063     .parent        = TYPE_OBJECT,
1064     .instance_size = sizeof(struct XilinxAXIEnetStreamSlave),
1065     .class_init    = xilinx_enet_stream_class_init,
1066     .class_data    = xilinx_axienet_control_stream_push,
1067     .interfaces = (InterfaceInfo[]) {
1068             { TYPE_STREAM_SLAVE },
1069             { }
1070     }
1071 };
1072
1073 static void xilinx_enet_register_types(void)
1074 {
1075     type_register_static(&xilinx_enet_info);
1076     type_register_static(&xilinx_enet_data_stream_info);
1077     type_register_static(&xilinx_enet_control_stream_info);
1078 }
1079
1080 type_init(xilinx_enet_register_types)