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