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 "qemu/osdep.h"
  26 #include "hw/hw.h"
  27 #include "hw/sysbus.h"
  28 #include "qapi/error.h"
  29 #include "qemu/log.h"
  30 #include "qemu/module.h"
  31 #include "net/net.h"
  32 #include "net/checksum.h"
  33
  34 #include "hw/hw.h"
  35 #include "hw/irq.h"
  36 #include "hw/qdev-properties.h"
  37 #include "hw/stream.h"
  38
  39 #define DPHY(x)
  40
  41 #define TYPE_XILINX_AXI_ENET "xlnx.axi-ethernet"
  42 #define TYPE_XILINX_AXI_ENET_DATA_STREAM "xilinx-axienet-data-stream"
  43 #define TYPE_XILINX_AXI_ENET_CONTROL_STREAM "xilinx-axienet-control-stream"
  44
  45 #define XILINX_AXI_ENET(obj) \
  46      OBJECT_CHECK(XilinxAXIEnet, (obj), TYPE_XILINX_AXI_ENET)
  47
  48 #define XILINX_AXI_ENET_DATA_STREAM(obj) \
  49      OBJECT_CHECK(XilinxAXIEnetStreamSlave, (obj),\
  50      TYPE_XILINX_AXI_ENET_DATA_STREAM)
  51
  52 #define XILINX_AXI_ENET_CONTROL_STREAM(obj) \
  53      OBJECT_CHECK(XilinxAXIEnetStreamSlave, (obj),\
  54      TYPE_XILINX_AXI_ENET_CONTROL_STREAM)
  55
  56 /* Advertisement control register. */
  57 #define ADVERTISE_10HALF        0x0020  /* Try for 10mbps half-duplex  */
  58 #define ADVERTISE_10FULL        0x0040  /* Try for 10mbps full-duplex  */
  59 #define ADVERTISE_100HALF       0x0080  /* Try for 100mbps half-duplex */
  60 #define ADVERTISE_100FULL       0x0100  /* Try for 100mbps full-duplex */
  61
  62 #define CONTROL_PAYLOAD_WORDS 5
  63 #define CONTROL_PAYLOAD_SIZE (CONTROL_PAYLOAD_WORDS * (sizeof(uint32_t)))
  64
  65 struct PHY {
  66     uint32_t regs[32];
  67
  68     int link;
  69
  70     unsigned int (*read)(struct PHY *phy, unsigned int req);
  71     void (*write)(struct PHY *phy, unsigned int req,
  72                   unsigned int data);
  73 };
  74
  75 static unsigned int tdk_read(struct PHY *phy, unsigned int req)
  76 {
  77     int regnum;
  78     unsigned r = 0;
  79
  80     regnum = req & 0x1f;
  81
  82     switch (regnum) {
  83         case 1:
  84             if (!phy->link) {
  85                 break;
  86             }
  87             /* MR1.  */
  88             /* Speeds and modes.  */
  89             r |= (1 << 13) | (1 << 14);
  90             r |= (1 << 11) | (1 << 12);
  91             r |= (1 << 5); /* Autoneg complete.  */
  92             r |= (1 << 3); /* Autoneg able.  */
  93             r |= (1 << 2); /* link.  */
  94             r |= (1 << 1); /* link.  */
  95             break;
  96         case 5:
  97             /* Link partner ability.
  98                We are kind; always agree with whatever best mode
  99                the guest advertises.  */
 100             r = 1 << 14; /* Success.  */
 101             /* Copy advertised modes.  */
 102             r |= phy->regs[4] & (15 << 5);
 103             /* Autoneg support.  */
 104             r |= 1;
 105             break;
 106         case 17:
 107             /* Marvell PHY on many xilinx boards.  */
 108             r = 0x8000; /* 1000Mb  */
 109             break;
 110         case 18:
 111             {
 112                 /* Diagnostics reg.  */
 113                 int duplex = 0;
 114                 int speed_100 = 0;
 115
 116                 if (!phy->link) {
 117                     break;
 118                 }
 119
 120                 /* Are we advertising 100 half or 100 duplex ? */
 121                 speed_100 = !!(phy->regs[4] & ADVERTISE_100HALF);
 122                 speed_100 |= !!(phy->regs[4] & ADVERTISE_100FULL);
 123
 124                 /* Are we advertising 10 duplex or 100 duplex ? */
 125                 duplex = !!(phy->regs[4] & ADVERTISE_100FULL);
 126                 duplex |= !!(phy->regs[4] & ADVERTISE_10FULL);
 127                 r = (speed_100 << 10) | (duplex << 11);
 128             }
 129             break;
 130
 131         default:
 132             r = phy->regs[regnum];
 133             break;
 134     }
 135     DPHY(qemu_log("\n%s %x = reg[%d]\n", __func__, r, regnum));
 136     return r;
 137 }
 138
 139 static void
 140 tdk_write(struct PHY *phy, unsigned int req, unsigned int data)
 141 {
 142     int regnum;
 143
 144     regnum = req & 0x1f;
 145     DPHY(qemu_log("%s reg[%d] = %x\n", __func__, regnum, data));
 146     switch (regnum) {
 147         default:
 148             phy->regs[regnum] = data;
 149             break;
 150     }
 151
 152     /* Unconditionally clear regs[BMCR][BMCR_RESET] and auto-neg */
 153     phy->regs[0] &= ~0x8200;
 154 }
 155
 156 static void
 157 tdk_init(struct PHY *phy)
 158 {
 159     phy->regs[0] = 0x3100;
 160     /* PHY Id.  */
 161     phy->regs[2] = 0x0300;
 162     phy->regs[3] = 0xe400;
 163     /* Autonegotiation advertisement reg.  */
 164     phy->regs[4] = 0x01E1;
 165     phy->link = 1;
 166
 167     phy->read = tdk_read;
 168     phy->write = tdk_write;
 169 }
 170
 171 struct MDIOBus {
 172     /* bus.  */
 173     int mdc;
 174     int mdio;
 175
 176     /* decoder.  */
 177     enum {
 178         PREAMBLE,
 179         SOF,
 180         OPC,
 181         ADDR,
 182         REQ,
 183         TURNAROUND,
 184         DATA
 185     } state;
 186     unsigned int drive;
 187
 188     unsigned int cnt;
 189     unsigned int addr;
 190     unsigned int opc;
 191     unsigned int req;
 192     unsigned int data;
 193
 194     struct PHY *devs[32];
 195 };
 196
 197 static void
 198 mdio_attach(struct MDIOBus *bus, struct PHY *phy, unsigned int addr)
 199 {
 200     bus->devs[addr & 0x1f] = phy;
 201 }
 202
 203 #ifdef USE_THIS_DEAD_CODE
 204 static void
 205 mdio_detach(struct MDIOBus *bus, struct PHY *phy, unsigned int addr)
 206 {
 207     bus->devs[addr & 0x1f] = NULL;
 208 }
 209 #endif
 210
 211 static uint16_t mdio_read_req(struct MDIOBus *bus, unsigned int addr,
 212                   unsigned int reg)
 213 {
 214     struct PHY *phy;
 215     uint16_t data;
 216
 217     phy = bus->devs[addr];
 218     if (phy && phy->read) {
 219         data = phy->read(phy, reg);
 220     } else {
 221         data = 0xffff;
 222     }
 223     DPHY(qemu_log("%s addr=%d reg=%d data=%x\n", __func__, addr, reg, data));
 224     return data;
 225 }
 226
 227 static void mdio_write_req(struct MDIOBus *bus, unsigned int addr,
 228                unsigned int reg, uint16_t data)
 229 {
 230     struct PHY *phy;
 231
 232     DPHY(qemu_log("%s addr=%d reg=%d data=%x\n", __func__, addr, reg, data));
 233     phy = bus->devs[addr];
 234     if (phy && phy->write) {
 235         phy->write(phy, reg, data);
 236     }
 237 }
 238
 239 #define DENET(x)
 240
 241 #define R_RAF      (0x000 / 4)
 242 enum {
 243     RAF_MCAST_REJ = (1 << 1),
 244     RAF_BCAST_REJ = (1 << 2),
 245     RAF_EMCF_EN = (1 << 12),
 246     RAF_NEWFUNC_EN = (1 << 11)
 247 };
 248
 249 #define R_IS       (0x00C / 4)
 250 enum {
 251     IS_HARD_ACCESS_COMPLETE = 1,
 252     IS_AUTONEG = (1 << 1),
 253     IS_RX_COMPLETE = (1 << 2),
 254     IS_RX_REJECT = (1 << 3),
 255     IS_TX_COMPLETE = (1 << 5),
 256     IS_RX_DCM_LOCK = (1 << 6),
 257     IS_MGM_RDY = (1 << 7),
 258     IS_PHY_RST_DONE = (1 << 8),
 259 };
 260
 261 #define R_IP       (0x010 / 4)
 262 #define R_IE       (0x014 / 4)
 263 #define R_UAWL     (0x020 / 4)
 264 #define R_UAWU     (0x024 / 4)
 265 #define R_PPST     (0x030 / 4)
 266 enum {
 267     PPST_LINKSTATUS = (1 << 0),
 268     PPST_PHY_LINKSTATUS = (1 << 7),
 269 };
 270
 271 #define R_STATS_RX_BYTESL (0x200 / 4)
 272 #define R_STATS_RX_BYTESH (0x204 / 4)
 273 #define R_STATS_TX_BYTESL (0x208 / 4)
 274 #define R_STATS_TX_BYTESH (0x20C / 4)
 275 #define R_STATS_RXL       (0x290 / 4)
 276 #define R_STATS_RXH       (0x294 / 4)
 277 #define R_STATS_RX_BCASTL (0x2a0 / 4)
 278 #define R_STATS_RX_BCASTH (0x2a4 / 4)
 279 #define R_STATS_RX_MCASTL (0x2a8 / 4)
 280 #define R_STATS_RX_MCASTH (0x2ac / 4)
 281
 282 #define R_RCW0     (0x400 / 4)
 283 #define R_RCW1     (0x404 / 4)
 284 enum {
 285     RCW1_VLAN = (1 << 27),
 286     RCW1_RX   = (1 << 28),
 287     RCW1_FCS  = (1 << 29),
 288     RCW1_JUM  = (1 << 30),
 289     RCW1_RST  = (1 << 31),
 290 };
 291
 292 #define R_TC       (0x408 / 4)
 293 enum {
 294     TC_VLAN = (1 << 27),
 295     TC_TX   = (1 << 28),
 296     TC_FCS  = (1 << 29),
 297     TC_JUM  = (1 << 30),
 298     TC_RST  = (1 << 31),
 299 };
 300
 301 #define R_EMMC     (0x410 / 4)
 302 enum {
 303     EMMC_LINKSPEED_10MB = (0 << 30),
 304     EMMC_LINKSPEED_100MB = (1 << 30),
 305     EMMC_LINKSPEED_1000MB = (2 << 30),
 306 };
 307
 308 #define R_PHYC     (0x414 / 4)
 309
 310 #define R_MC       (0x500 / 4)
 311 #define MC_EN      (1 << 6)
 312
 313 #define R_MCR      (0x504 / 4)
 314 #define R_MWD      (0x508 / 4)
 315 #define R_MRD      (0x50c / 4)
 316 #define R_MIS      (0x600 / 4)
 317 #define R_MIP      (0x620 / 4)
 318 #define R_MIE      (0x640 / 4)
 319 #define R_MIC      (0x640 / 4)
 320
 321 #define R_UAW0     (0x700 / 4)
 322 #define R_UAW1     (0x704 / 4)
 323 #define R_FMI      (0x708 / 4)
 324 #define R_AF0      (0x710 / 4)
 325 #define R_AF1      (0x714 / 4)
 326 #define R_MAX      (0x34 / 4)
 327
 328 /* Indirect registers.  */
 329 struct TEMAC  {
 330     struct MDIOBus mdio_bus;
 331     struct PHY phy;
 332
 333     void *parent;
 334 };
 335
 336 typedef struct XilinxAXIEnetStreamSlave XilinxAXIEnetStreamSlave;
 337 typedef struct XilinxAXIEnet XilinxAXIEnet;
 338
 339 struct XilinxAXIEnetStreamSlave {
 340     Object parent;
 341
 342     struct XilinxAXIEnet *enet;
 343 } ;
 344
 345 struct XilinxAXIEnet {
 346     SysBusDevice busdev;
 347     MemoryRegion iomem;
 348     qemu_irq irq;
 349     StreamSlave *tx_data_dev;
 350     StreamSlave *tx_control_dev;
 351     XilinxAXIEnetStreamSlave rx_data_dev;
 352     XilinxAXIEnetStreamSlave rx_control_dev;
 353     NICState *nic;
 354     NICConf conf;
 355
 356
 357     uint32_t c_rxmem;
 358     uint32_t c_txmem;
 359     uint32_t c_phyaddr;
 360
 361     struct TEMAC TEMAC;
 362
 363     /* MII regs.  */
 364     union {
 365         uint32_t regs[4];
 366         struct {
 367             uint32_t mc;
 368             uint32_t mcr;
 369             uint32_t mwd;
 370             uint32_t mrd;
 371         };
 372     } mii;
 373
 374     struct {
 375         uint64_t rx_bytes;
 376         uint64_t tx_bytes;
 377
 378         uint64_t rx;
 379         uint64_t rx_bcast;
 380         uint64_t rx_mcast;
 381     } stats;
 382
 383     /* Receive configuration words.  */
 384     uint32_t rcw[2];
 385     /* Transmit config.  */
 386     uint32_t tc;
 387     uint32_t emmc;
 388     uint32_t phyc;
 389
 390     /* Unicast Address Word.  */
 391     uint32_t uaw[2];
 392     /* Unicast address filter used with extended mcast.  */
 393     uint32_t ext_uaw[2];
 394     uint32_t fmi;
 395
 396     uint32_t regs[R_MAX];
 397
 398     /* Multicast filter addrs.  */
 399     uint32_t maddr[4][2];
 400     /* 32K x 1 lookup filter.  */
 401     uint32_t ext_mtable[1024];
 402
 403     uint32_t hdr[CONTROL_PAYLOAD_WORDS];
 404
 405     uint8_t *txmem;
 406     uint32_t txpos;
 407
 408     uint8_t *rxmem;
 409     uint32_t rxsize;
 410     uint32_t rxpos;
 411
 412     uint8_t rxapp[CONTROL_PAYLOAD_SIZE];
 413     uint32_t rxappsize;
 414
 415     /* Whether axienet_eth_rx_notify should flush incoming queue. */
 416     bool need_flush;
 417 };
 418
 419 static void axienet_rx_reset(XilinxAXIEnet *s)
 420 {
 421     s->rcw[1] = RCW1_JUM | RCW1_FCS | RCW1_RX | RCW1_VLAN;
 422 }
 423
 424 static void axienet_tx_reset(XilinxAXIEnet *s)
 425 {
 426     s->tc = TC_JUM | TC_TX | TC_VLAN;
 427     s->txpos = 0;
 428 }
 429
 430 static inline int axienet_rx_resetting(XilinxAXIEnet *s)
 431 {
 432     return s->rcw[1] & RCW1_RST;
 433 }
 434
 435 static inline int axienet_rx_enabled(XilinxAXIEnet *s)
 436 {
 437     return s->rcw[1] & RCW1_RX;
 438 }
 439
 440 static inline int axienet_extmcf_enabled(XilinxAXIEnet *s)
 441 {
 442     return !!(s->regs[R_RAF] & RAF_EMCF_EN);
 443 }
 444
 445 static inline int axienet_newfunc_enabled(XilinxAXIEnet *s)
 446 {
 447     return !!(s->regs[R_RAF] & RAF_NEWFUNC_EN);
 448 }
 449
 450 static void xilinx_axienet_reset(DeviceState *d)
 451 {
 452     XilinxAXIEnet *s = XILINX_AXI_ENET(d);
 453
 454     axienet_rx_reset(s);
 455     axienet_tx_reset(s);
 456
 457     s->regs[R_PPST] = PPST_LINKSTATUS | PPST_PHY_LINKSTATUS;
 458     s->regs[R_IS] = IS_AUTONEG | IS_RX_DCM_LOCK | IS_MGM_RDY | IS_PHY_RST_DONE;
 459
 460     s->emmc = EMMC_LINKSPEED_100MB;
 461 }
 462
 463 static void enet_update_irq(XilinxAXIEnet *s)
 464 {
 465     s->regs[R_IP] = s->regs[R_IS] & s->regs[R_IE];
 466     qemu_set_irq(s->irq, !!s->regs[R_IP]);
 467 }
 468
 469 static uint64_t enet_read(void *opaque, hwaddr addr, unsigned size)
 470 {
 471     XilinxAXIEnet *s = opaque;
 472     uint32_t r = 0;
 473     addr >>= 2;
 474
 475     switch (addr) {
 476         case R_RCW0:
 477         case R_RCW1:
 478             r = s->rcw[addr & 1];
 479             break;
 480
 481         case R_TC:
 482             r = s->tc;
 483             break;
 484
 485         case R_EMMC:
 486             r = s->emmc;
 487             break;
 488
 489         case R_PHYC:
 490             r = s->phyc;
 491             break;
 492
 493         case R_MCR:
 494             r = s->mii.regs[addr & 3] | (1 << 7); /* Always ready.  */
 495             break;
 496
 497         case R_STATS_RX_BYTESL:
 498         case R_STATS_RX_BYTESH:
 499             r = s->stats.rx_bytes >> (32 * (addr & 1));
 500             break;
 501
 502         case R_STATS_TX_BYTESL:
 503         case R_STATS_TX_BYTESH:
 504             r = s->stats.tx_bytes >> (32 * (addr & 1));
 505             break;
 506
 507         case R_STATS_RXL:
 508         case R_STATS_RXH:
 509             r = s->stats.rx >> (32 * (addr & 1));
 510             break;
 511         case R_STATS_RX_BCASTL:
 512         case R_STATS_RX_BCASTH:
 513             r = s->stats.rx_bcast >> (32 * (addr & 1));
 514             break;
 515         case R_STATS_RX_MCASTL:
 516         case R_STATS_RX_MCASTH:
 517             r = s->stats.rx_mcast >> (32 * (addr & 1));
 518             break;
 519
 520         case R_MC:
 521         case R_MWD:
 522         case R_MRD:
 523             r = s->mii.regs[addr & 3];
 524             break;
 525
 526         case R_UAW0:
 527         case R_UAW1:
 528             r = s->uaw[addr & 1];
 529             break;
 530
 531         case R_UAWU:
 532         case R_UAWL:
 533             r = s->ext_uaw[addr & 1];
 534             break;
 535
 536         case R_FMI:
 537             r = s->fmi;
 538             break;
 539
 540         case R_AF0:
 541         case R_AF1:
 542             r = s->maddr[s->fmi & 3][addr & 1];
 543             break;
 544
 545         case 0x8000 ... 0x83ff:
 546             r = s->ext_mtable[addr - 0x8000];
 547             break;
 548
 549         default:
 550             if (addr < ARRAY_SIZE(s->regs)) {
 551                 r = s->regs[addr];
 552             }
 553             DENET(qemu_log("%s addr=" TARGET_FMT_plx " v=%x\n",
 554                             __func__, addr * 4, r));
 555             break;
 556     }
 557     return r;
 558 }
 559
 560 static void enet_write(void *opaque, hwaddr addr,
 561                        uint64_t value, unsigned size)
 562 {
 563     XilinxAXIEnet *s = opaque;
 564     struct TEMAC *t = &s->TEMAC;
 565
 566     addr >>= 2;
 567     switch (addr) {
 568         case R_RCW0:
 569         case R_RCW1:
 570             s->rcw[addr & 1] = value;
 571             if ((addr & 1) && value & RCW1_RST) {
 572                 axienet_rx_reset(s);
 573             } else {
 574                 qemu_flush_queued_packets(qemu_get_queue(s->nic));
 575             }
 576             break;
 577
 578         case R_TC:
 579             s->tc = value;
 580             if (value & TC_RST) {
 581                 axienet_tx_reset(s);
 582             }
 583             break;
 584
 585         case R_EMMC:
 586             s->emmc = value;
 587             break;
 588
 589         case R_PHYC:
 590             s->phyc = value;
 591             break;
 592
 593         case R_MC:
 594              value &= ((1 << 7) - 1);
 595
 596              /* Enable the MII.  */
 597              if (value & MC_EN) {
 598                  unsigned int miiclkdiv = value & ((1 << 6) - 1);
 599                  if (!miiclkdiv) {
 600                      qemu_log("AXIENET: MDIO enabled but MDIOCLK is zero!\n");
 601                  }
 602              }
 603              s->mii.mc = value;
 604              break;
 605
 606         case R_MCR: {
 607              unsigned int phyaddr = (value >> 24) & 0x1f;
 608              unsigned int regaddr = (value >> 16) & 0x1f;
 609              unsigned int op = (value >> 14) & 3;
 610              unsigned int initiate = (value >> 11) & 1;
 611
 612              if (initiate) {
 613                  if (op == 1) {
 614                      mdio_write_req(&t->mdio_bus, phyaddr, regaddr, s->mii.mwd);
 615                  } else if (op == 2) {
 616                      s->mii.mrd = mdio_read_req(&t->mdio_bus, phyaddr, regaddr);
 617                  } else {
 618                      qemu_log("AXIENET: invalid MDIOBus OP=%d\n", op);
 619                  }
 620              }
 621              s->mii.mcr = value;
 622              break;
 623         }
 624
 625         case R_MWD:
 626         case R_MRD:
 627              s->mii.regs[addr & 3] = value;
 628              break;
 629
 630
 631         case R_UAW0:
 632         case R_UAW1:
 633             s->uaw[addr & 1] = value;
 634             break;
 635
 636         case R_UAWL:
 637         case R_UAWU:
 638             s->ext_uaw[addr & 1] = value;
 639             break;
 640
 641         case R_FMI:
 642             s->fmi = value;
 643             break;
 644
 645         case R_AF0:
 646         case R_AF1:
 647             s->maddr[s->fmi & 3][addr & 1] = value;
 648             break;
 649
 650         case R_IS:
 651             s->regs[addr] &= ~value;
 652             break;
 653
 654         case 0x8000 ... 0x83ff:
 655             s->ext_mtable[addr - 0x8000] = value;
 656             break;
 657
 658         default:
 659             DENET(qemu_log("%s addr=" TARGET_FMT_plx " v=%x\n",
 660                            __func__, addr * 4, (unsigned)value));
 661             if (addr < ARRAY_SIZE(s->regs)) {
 662                 s->regs[addr] = value;
 663             }
 664             break;
 665     }
 666     enet_update_irq(s);
 667 }
 668
 669 static const MemoryRegionOps enet_ops = {
 670     .read = enet_read,
 671     .write = enet_write,
 672     .endianness = DEVICE_LITTLE_ENDIAN,
 673 };
 674
 675 static int eth_can_rx(XilinxAXIEnet *s)
 676 {
 677     /* RX enabled?  */
 678     return !s->rxsize && !axienet_rx_resetting(s) && axienet_rx_enabled(s);
 679 }
 680
 681 static int enet_match_addr(const uint8_t *buf, uint32_t f0, uint32_t f1)
 682 {
 683     int match = 1;
 684
 685     if (memcmp(buf, &f0, 4)) {
 686         match = 0;
 687     }
 688
 689     if (buf[4] != (f1 & 0xff) || buf[5] != ((f1 >> 8) & 0xff)) {
 690         match = 0;
 691     }
 692
 693     return match;
 694 }
 695
 696 static void axienet_eth_rx_notify(void *opaque)
 697 {
 698     XilinxAXIEnet *s = XILINX_AXI_ENET(opaque);
 699
 700     while (s->rxappsize && stream_can_push(s->tx_control_dev,
 701                                            axienet_eth_rx_notify, s)) {
 702         size_t ret = stream_push(s->tx_control_dev,
 703                                  (void *)s->rxapp + CONTROL_PAYLOAD_SIZE
 704                                  - s->rxappsize, s->rxappsize, true);
 705         s->rxappsize -= ret;
 706     }
 707
 708     while (s->rxsize && stream_can_push(s->tx_data_dev,
 709                                         axienet_eth_rx_notify, s)) {
 710         size_t ret = stream_push(s->tx_data_dev, (void *)s->rxmem + s->rxpos,
 711                                  s->rxsize, true);
 712         s->rxsize -= ret;
 713         s->rxpos += ret;
 714         if (!s->rxsize) {
 715             s->regs[R_IS] |= IS_RX_COMPLETE;
 716             if (s->need_flush) {
 717                 s->need_flush = false;
 718                 qemu_flush_queued_packets(qemu_get_queue(s->nic));
 719             }
 720         }
 721     }
 722     enet_update_irq(s);
 723 }
 724
 725 static ssize_t eth_rx(NetClientState *nc, const uint8_t *buf, size_t size)
 726 {
 727     XilinxAXIEnet *s = qemu_get_nic_opaque(nc);
 728     static const unsigned char sa_bcast[6] = {0xff, 0xff, 0xff,
 729                                               0xff, 0xff, 0xff};
 730     static const unsigned char sa_ipmcast[3] = {0x01, 0x00, 0x52};
 731     uint32_t app[CONTROL_PAYLOAD_WORDS] = {0};
 732     int promisc = s->fmi & (1 << 31);
 733     int unicast, broadcast, multicast, ip_multicast = 0;
 734     uint32_t csum32;
 735     uint16_t csum16;
 736     int i;
 737
 738     DENET(qemu_log("%s: %zd bytes\n", __func__, size));
 739
 740     if (!eth_can_rx(s)) {
 741         s->need_flush = true;
 742         return 0;
 743     }
 744
 745     unicast = ~buf[0] & 0x1;
 746     broadcast = memcmp(buf, sa_bcast, 6) == 0;
 747     multicast = !unicast && !broadcast;
 748     if (multicast && (memcmp(sa_ipmcast, buf, sizeof sa_ipmcast) == 0)) {
 749         ip_multicast = 1;
 750     }
 751
 752     /* Jumbo or vlan sizes ?  */
 753     if (!(s->rcw[1] & RCW1_JUM)) {
 754         if (size > 1518 && size <= 1522 && !(s->rcw[1] & RCW1_VLAN)) {
 755             return size;
 756         }
 757     }
 758
 759     /* Basic Address filters.  If you want to use the extended filters
 760        you'll generally have to place the ethernet mac into promiscuous mode
 761        to avoid the basic filtering from dropping most frames.  */
 762     if (!promisc) {
 763         if (unicast) {
 764             if (!enet_match_addr(buf, s->uaw[0], s->uaw[1])) {
 765                 return size;
 766             }
 767         } else {
 768             if (broadcast) {
 769                 /* Broadcast.  */
 770                 if (s->regs[R_RAF] & RAF_BCAST_REJ) {
 771                     return size;
 772                 }
 773             } else {
 774                 int drop = 1;
 775
 776                 /* Multicast.  */
 777                 if (s->regs[R_RAF] & RAF_MCAST_REJ) {
 778                     return size;
 779                 }
 780
 781                 for (i = 0; i < 4; i++) {
 782                     if (enet_match_addr(buf, s->maddr[i][0], s->maddr[i][1])) {
 783                         drop = 0;
 784                         break;
 785                     }
 786                 }
 787
 788                 if (drop) {
 789                     return size;
 790                 }
 791             }
 792         }
 793     }
 794
 795     /* Extended mcast filtering enabled?  */
 796     if (axienet_newfunc_enabled(s) && axienet_extmcf_enabled(s)) {
 797         if (unicast) {
 798             if (!enet_match_addr(buf, s->ext_uaw[0], s->ext_uaw[1])) {
 799                 return size;
 800             }
 801         } else {
 802             if (broadcast) {
 803                 /* Broadcast. ???  */
 804                 if (s->regs[R_RAF] & RAF_BCAST_REJ) {
 805                     return size;
 806                 }
 807             } else {
 808                 int idx, bit;
 809
 810                 /* Multicast.  */
 811                 if (!memcmp(buf, sa_ipmcast, 3)) {
 812                     return size;
 813                 }
 814
 815                 idx  = (buf[4] & 0x7f) << 8;
 816                 idx |= buf[5];
 817
 818                 bit = 1 << (idx & 0x1f);
 819                 idx >>= 5;
 820
 821                 if (!(s->ext_mtable[idx] & bit)) {
 822                     return size;
 823                 }
 824             }
 825         }
 826     }
 827
 828     if (size < 12) {
 829         s->regs[R_IS] |= IS_RX_REJECT;
 830         enet_update_irq(s);
 831         return -1;
 832     }
 833
 834     if (size > (s->c_rxmem - 4)) {
 835         size = s->c_rxmem - 4;
 836     }
 837
 838     memcpy(s->rxmem, buf, size);
 839     memset(s->rxmem + size, 0, 4); /* Clear the FCS.  */
 840
 841     if (s->rcw[1] & RCW1_FCS) {
 842         size += 4; /* fcs is inband.  */
 843     }
 844
 845     app[0] = 5 << 28;
 846     csum32 = net_checksum_add(size - 14, (uint8_t *)s->rxmem + 14);
 847     /* Fold it once.  */
 848     csum32 = (csum32 & 0xffff) + (csum32 >> 16);
 849     /* And twice to get rid of possible carries.  */
 850     csum16 = (csum32 & 0xffff) + (csum32 >> 16);
 851     app[3] = csum16;
 852     app[4] = size & 0xffff;
 853
 854     s->stats.rx_bytes += size;
 855     s->stats.rx++;
 856     if (multicast) {
 857         s->stats.rx_mcast++;
 858         app[2] |= 1 | (ip_multicast << 1);
 859     } else if (broadcast) {
 860         s->stats.rx_bcast++;
 861         app[2] |= 1 << 3;
 862     }
 863
 864     /* Good frame.  */
 865     app[2] |= 1 << 6;
 866
 867     s->rxsize = size;
 868     s->rxpos = 0;
 869     for (i = 0; i < ARRAY_SIZE(app); ++i) {
 870         app[i] = cpu_to_le32(app[i]);
 871     }
 872     s->rxappsize = CONTROL_PAYLOAD_SIZE;
 873     memcpy(s->rxapp, app, s->rxappsize);
 874     axienet_eth_rx_notify(s);
 875
 876     enet_update_irq(s);
 877     return size;
 878 }
 879
 880 static size_t
 881 xilinx_axienet_control_stream_push(StreamSlave *obj, uint8_t *buf, size_t len,
 882                                    bool eop)
 883 {
 884     int i;
 885     XilinxAXIEnetStreamSlave *cs = XILINX_AXI_ENET_CONTROL_STREAM(obj);
 886     XilinxAXIEnet *s = cs->enet;
 887
 888     assert(eop);
 889     if (len != CONTROL_PAYLOAD_SIZE) {
 890         hw_error("AXI Enet requires %d byte control stream payload\n",
 891                  (int)CONTROL_PAYLOAD_SIZE);
 892     }
 893
 894     memcpy(s->hdr, buf, len);
 895
 896     for (i = 0; i < ARRAY_SIZE(s->hdr); ++i) {
 897         s->hdr[i] = le32_to_cpu(s->hdr[i]);
 898     }
 899     return len;
 900 }
 901
 902 static size_t
 903 xilinx_axienet_data_stream_push(StreamSlave *obj, uint8_t *buf, size_t size,
 904                                 bool eop)
 905 {
 906     XilinxAXIEnetStreamSlave *ds = XILINX_AXI_ENET_DATA_STREAM(obj);
 907     XilinxAXIEnet *s = ds->enet;
 908
 909     /* TX enable ?  */
 910     if (!(s->tc & TC_TX)) {
 911         return size;
 912     }
 913
 914     if (s->txpos + size > s->c_txmem) {
 915         qemu_log_mask(LOG_GUEST_ERROR, "%s: Packet larger than txmem\n",
 916                       TYPE_XILINX_AXI_ENET);
 917         s->txpos = 0;
 918         return size;
 919     }
 920
 921     if (s->txpos == 0 && eop) {
 922         /* Fast path single fragment.  */
 923         s->txpos = size;
 924     } else {
 925         memcpy(s->txmem + s->txpos, buf, size);
 926         buf = s->txmem;
 927         s->txpos += size;
 928
 929         if (!eop) {
 930             return size;
 931         }
 932     }
 933
 934     /* Jumbo or vlan sizes ?  */
 935     if (!(s->tc & TC_JUM)) {
 936         if (s->txpos > 1518 && s->txpos <= 1522 && !(s->tc & TC_VLAN)) {
 937             s->txpos = 0;
 938             return size;
 939         }
 940     }
 941
 942     if (s->hdr[0] & 1) {
 943         unsigned int start_off = s->hdr[1] >> 16;
 944         unsigned int write_off = s->hdr[1] & 0xffff;
 945         uint32_t tmp_csum;
 946         uint16_t csum;
 947
 948         tmp_csum = net_checksum_add(s->txpos - start_off,
 949                                     buf + start_off);
 950         /* Accumulate the seed.  */
 951         tmp_csum += s->hdr[2] & 0xffff;
 952
 953         /* Fold the 32bit partial checksum.  */
 954         csum = net_checksum_finish(tmp_csum);
 955
 956         /* Writeback.  */
 957         buf[write_off] = csum >> 8;
 958         buf[write_off + 1] = csum & 0xff;
 959     }
 960
 961     qemu_send_packet(qemu_get_queue(s->nic), buf, s->txpos);
 962
 963     s->stats.tx_bytes += s->txpos;
 964     s->regs[R_IS] |= IS_TX_COMPLETE;
 965     enet_update_irq(s);
 966
 967     s->txpos = 0;
 968     return size;
 969 }
 970
 971 static NetClientInfo net_xilinx_enet_info = {
 972     .type = NET_CLIENT_DRIVER_NIC,
 973     .size = sizeof(NICState),
 974     .receive = eth_rx,
 975 };
 976
 977 static void xilinx_enet_realize(DeviceState *dev, Error **errp)
 978 {
 979     XilinxAXIEnet *s = XILINX_AXI_ENET(dev);
 980     XilinxAXIEnetStreamSlave *ds = XILINX_AXI_ENET_DATA_STREAM(&s->rx_data_dev);
 981     XilinxAXIEnetStreamSlave *cs = XILINX_AXI_ENET_CONTROL_STREAM(
 982                                                             &s->rx_control_dev);
 983
 984     object_property_add_link(OBJECT(ds), "enet", "xlnx.axi-ethernet",
 985                              (Object **) &ds->enet,
 986                              object_property_allow_set_link,
 987                              OBJ_PROP_LINK_STRONG);
 988     object_property_add_link(OBJECT(cs), "enet", "xlnx.axi-ethernet",
 989                              (Object **) &cs->enet,
 990                              object_property_allow_set_link,
 991                              OBJ_PROP_LINK_STRONG);
 992     object_property_set_link(OBJECT(ds), "enet", OBJECT(s), &error_abort);
 993     object_property_set_link(OBJECT(cs), "enet", OBJECT(s), &error_abort);
 994
 995     qemu_macaddr_default_if_unset(&s->conf.macaddr);
 996     s->nic = qemu_new_nic(&net_xilinx_enet_info, &s->conf,
 997                           object_get_typename(OBJECT(dev)), dev->id, s);
 998     qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
 999
1000     tdk_init(&s->TEMAC.phy);
1001     mdio_attach(&s->TEMAC.mdio_bus, &s->TEMAC.phy, s->c_phyaddr);
1002
1003     s->TEMAC.parent = s;
1004
1005     s->rxmem = g_malloc(s->c_rxmem);
1006     s->txmem = g_malloc(s->c_txmem);
1007 }
1008
1009 static void xilinx_enet_init(Object *obj)
1010 {
1011     XilinxAXIEnet *s = XILINX_AXI_ENET(obj);
1012     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
1013
1014     object_initialize_child(OBJECT(s), "axistream-connected-target",
1015                             &s->rx_data_dev, TYPE_XILINX_AXI_ENET_DATA_STREAM);
1016     object_initialize_child(OBJECT(s), "axistream-control-connected-target",
1017                             &s->rx_control_dev,
1018                             TYPE_XILINX_AXI_ENET_CONTROL_STREAM);
1019     sysbus_init_irq(sbd, &s->irq);
1020
1021     memory_region_init_io(&s->iomem, OBJECT(s), &enet_ops, s, "enet", 0x40000);
1022     sysbus_init_mmio(sbd, &s->iomem);
1023 }
1024
1025 static Property xilinx_enet_properties[] = {
1026     DEFINE_PROP_UINT32("phyaddr", XilinxAXIEnet, c_phyaddr, 7),
1027     DEFINE_PROP_UINT32("rxmem", XilinxAXIEnet, c_rxmem, 0x1000),
1028     DEFINE_PROP_UINT32("txmem", XilinxAXIEnet, c_txmem, 0x1000),
1029     DEFINE_NIC_PROPERTIES(XilinxAXIEnet, conf),
1030     DEFINE_PROP_LINK("axistream-connected", XilinxAXIEnet,
1031                      tx_data_dev, TYPE_STREAM_SLAVE, StreamSlave *),
1032     DEFINE_PROP_LINK("axistream-control-connected", XilinxAXIEnet,
1033                      tx_control_dev, TYPE_STREAM_SLAVE, StreamSlave *),
1034     DEFINE_PROP_END_OF_LIST(),
1035 };
1036
1037 static void xilinx_enet_class_init(ObjectClass *klass, void *data)
1038 {
1039     DeviceClass *dc = DEVICE_CLASS(klass);
1040
1041     dc->realize = xilinx_enet_realize;
1042     device_class_set_props(dc, xilinx_enet_properties);
1043     dc->reset = xilinx_axienet_reset;
1044 }
1045
1046 static void xilinx_enet_control_stream_class_init(ObjectClass *klass,
1047                                                   void *data)
1048 {
1049     StreamSlaveClass *ssc = STREAM_SLAVE_CLASS(klass);
1050
1051     ssc->push = xilinx_axienet_control_stream_push;
1052 }
1053
1054 static void xilinx_enet_data_stream_class_init(ObjectClass *klass, void *data)
1055 {
1056     StreamSlaveClass *ssc = STREAM_SLAVE_CLASS(klass);
1057
1058     ssc->push = xilinx_axienet_data_stream_push;
1059 }
1060
1061 static const TypeInfo xilinx_enet_info = {
1062     .name          = TYPE_XILINX_AXI_ENET,
1063     .parent        = TYPE_SYS_BUS_DEVICE,
1064     .instance_size = sizeof(XilinxAXIEnet),
1065     .class_init    = xilinx_enet_class_init,
1066     .instance_init = xilinx_enet_init,
1067 };
1068
1069 static const TypeInfo xilinx_enet_data_stream_info = {
1070     .name          = TYPE_XILINX_AXI_ENET_DATA_STREAM,
1071     .parent        = TYPE_OBJECT,
1072     .instance_size = sizeof(struct XilinxAXIEnetStreamSlave),
1073     .class_init    = xilinx_enet_data_stream_class_init,
1074     .interfaces = (InterfaceInfo[]) {
1075             { TYPE_STREAM_SLAVE },
1076             { }
1077     }
1078 };
1079
1080 static const TypeInfo xilinx_enet_control_stream_info = {
1081     .name          = TYPE_XILINX_AXI_ENET_CONTROL_STREAM,
1082     .parent        = TYPE_OBJECT,
1083     .instance_size = sizeof(struct XilinxAXIEnetStreamSlave),
1084     .class_init    = xilinx_enet_control_stream_class_init,
1085     .interfaces = (InterfaceInfo[]) {
1086             { TYPE_STREAM_SLAVE },
1087             { }
1088     }
1089 };
1090
1091 static void xilinx_enet_register_types(void)
1092 {
1093     type_register_static(&xilinx_enet_info);
1094     type_register_static(&xilinx_enet_data_stream_info);
1095     type_register_static(&xilinx_enet_control_stream_info);
1096 }
1097
1098 type_init(xilinx_enet_register_types)