hw/net/msf2-emac.c

   1 /*
   2  * QEMU model of the Smartfusion2 Ethernet MAC.
   3  *
   4  * Copyright (c) 2020 Subbaraya Sundeep <sundeep.lkml@gmail.com>.
   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  * Refer to section Ethernet MAC in the document:
  25  * UG0331: SmartFusion2 Microcontroller Subsystem User Guide
  26  * Datasheet URL:
  27  * https://www.microsemi.com/document-portal/cat_view/56661-internal-documents/
  28  * 56758-soc?lang=en&limit=20&limitstart=220
  29  */
  30
  31 #include "qemu/osdep.h"
  32 #include "qemu/log.h"
  33 #include "qapi/error.h"
  34 #include "hw/registerfields.h"
  35 #include "hw/net/msf2-emac.h"
  36 #include "hw/net/mii.h"
  37 #include "hw/irq.h"
  38 #include "hw/qdev-properties.h"
  39 #include "migration/vmstate.h"
  40
  41 REG32(CFG1, 0x0)
  42     FIELD(CFG1, RESET, 31, 1)
  43     FIELD(CFG1, RX_EN, 2, 1)
  44     FIELD(CFG1, TX_EN, 0, 1)
  45     FIELD(CFG1, LB_EN, 8, 1)
  46 REG32(CFG2, 0x4)
  47 REG32(IFG, 0x8)
  48 REG32(HALF_DUPLEX, 0xc)
  49 REG32(MAX_FRAME_LENGTH, 0x10)
  50 REG32(MII_CMD, 0x24)
  51     FIELD(MII_CMD, READ, 0, 1)
  52 REG32(MII_ADDR, 0x28)
  53     FIELD(MII_ADDR, REGADDR, 0, 5)
  54     FIELD(MII_ADDR, PHYADDR, 8, 5)
  55 REG32(MII_CTL, 0x2c)
  56 REG32(MII_STS, 0x30)
  57 REG32(STA1, 0x40)
  58 REG32(STA2, 0x44)
  59 REG32(FIFO_CFG0, 0x48)
  60 REG32(FIFO_CFG4, 0x58)
  61     FIELD(FIFO_CFG4, BCAST, 9, 1)
  62     FIELD(FIFO_CFG4, MCAST, 8, 1)
  63 REG32(FIFO_CFG5, 0x5C)
  64     FIELD(FIFO_CFG5, BCAST, 9, 1)
  65     FIELD(FIFO_CFG5, MCAST, 8, 1)
  66 REG32(DMA_TX_CTL, 0x180)
  67     FIELD(DMA_TX_CTL, EN, 0, 1)
  68 REG32(DMA_TX_DESC, 0x184)
  69 REG32(DMA_TX_STATUS, 0x188)
  70     FIELD(DMA_TX_STATUS, PKTCNT, 16, 8)
  71     FIELD(DMA_TX_STATUS, UNDERRUN, 1, 1)
  72     FIELD(DMA_TX_STATUS, PKT_SENT, 0, 1)
  73 REG32(DMA_RX_CTL, 0x18c)
  74     FIELD(DMA_RX_CTL, EN, 0, 1)
  75 REG32(DMA_RX_DESC, 0x190)
  76 REG32(DMA_RX_STATUS, 0x194)
  77     FIELD(DMA_RX_STATUS, PKTCNT, 16, 8)
  78     FIELD(DMA_RX_STATUS, OVERFLOW, 2, 1)
  79     FIELD(DMA_RX_STATUS, PKT_RCVD, 0, 1)
  80 REG32(DMA_IRQ_MASK, 0x198)
  81 REG32(DMA_IRQ, 0x19c)
  82
  83 #define EMPTY_MASK              (1 << 31)
  84 #define PKT_SIZE                0x7FF
  85 #define PHYADDR                 0x1
  86 #define MAX_PKT_SIZE            2048
  87
  88 typedef struct {
  89     uint32_t pktaddr;
  90     uint32_t pktsize;
  91     uint32_t next;
  92 } EmacDesc;
  93
  94 static uint32_t emac_get_isr(MSF2EmacState *s)
  95 {
  96     uint32_t ier = s->regs[R_DMA_IRQ_MASK];
  97     uint32_t tx = s->regs[R_DMA_TX_STATUS] & 0xF;
  98     uint32_t rx = s->regs[R_DMA_RX_STATUS] & 0xF;
  99     uint32_t isr = (rx << 4) | tx;
 100
 101     s->regs[R_DMA_IRQ] = ier & isr;
 102     return s->regs[R_DMA_IRQ];
 103 }
 104
 105 static void emac_update_irq(MSF2EmacState *s)
 106 {
 107     bool intr = emac_get_isr(s);
 108
 109     qemu_set_irq(s->irq, intr);
 110 }
 111
 112 static void emac_load_desc(MSF2EmacState *s, EmacDesc *d, hwaddr desc)
 113 {
 114     address_space_read(&s->dma_as, desc, MEMTXATTRS_UNSPECIFIED, d, sizeof *d);
 115     /* Convert from LE into host endianness. */
 116     d->pktaddr = le32_to_cpu(d->pktaddr);
 117     d->pktsize = le32_to_cpu(d->pktsize);
 118     d->next = le32_to_cpu(d->next);
 119 }
 120
 121 static void emac_store_desc(MSF2EmacState *s, const EmacDesc *d, hwaddr desc)
 122 {
 123     EmacDesc outd;
 124     /*
 125      * Convert from host endianness into LE. We use a local struct because
 126      * calling code may still want to look at the fields afterwards.
 127      */
 128     outd.pktaddr = cpu_to_le32(d->pktaddr);
 129     outd.pktsize = cpu_to_le32(d->pktsize);
 130     outd.next = cpu_to_le32(d->next);
 131
 132     address_space_write(&s->dma_as, desc, MEMTXATTRS_UNSPECIFIED, &outd, sizeof outd);
 133 }
 134
 135 static void msf2_dma_tx(MSF2EmacState *s)
 136 {
 137     NetClientState *nc = qemu_get_queue(s->nic);
 138     hwaddr desc = s->regs[R_DMA_TX_DESC];
 139     uint8_t buf[MAX_PKT_SIZE];
 140     EmacDesc d;
 141     int size;
 142     uint8_t pktcnt;
 143     uint32_t status;
 144
 145     if (!(s->regs[R_CFG1] & R_CFG1_TX_EN_MASK)) {
 146         return;
 147     }
 148
 149     while (1) {
 150         emac_load_desc(s, &d, desc);
 151         if (d.pktsize & EMPTY_MASK) {
 152             break;
 153         }
 154         size = d.pktsize & PKT_SIZE;
 155         address_space_read(&s->dma_as, d.pktaddr, MEMTXATTRS_UNSPECIFIED,
 156                            buf, size);
 157         /*
 158          * This is very basic way to send packets. Ideally there should be
 159          * a FIFO and packets should be sent out from FIFO only when
 160          * R_CFG1 bit 0 is set.
 161          */
 162         if (s->regs[R_CFG1] & R_CFG1_LB_EN_MASK) {
 163             qemu_receive_packet(nc, buf, size);
 164         } else {
 165             qemu_send_packet(nc, buf, size);
 166         }
 167         d.pktsize |= EMPTY_MASK;
 168         emac_store_desc(s, &d, desc);
 169         /* update sent packets count */
 170         status = s->regs[R_DMA_TX_STATUS];
 171         pktcnt = FIELD_EX32(status, DMA_TX_STATUS, PKTCNT);
 172         pktcnt++;
 173         s->regs[R_DMA_TX_STATUS] = FIELD_DP32(status, DMA_TX_STATUS,
 174                                               PKTCNT, pktcnt);
 175         s->regs[R_DMA_TX_STATUS] |= R_DMA_TX_STATUS_PKT_SENT_MASK;
 176         desc = d.next;
 177     }
 178     s->regs[R_DMA_TX_STATUS] |= R_DMA_TX_STATUS_UNDERRUN_MASK;
 179     s->regs[R_DMA_TX_CTL] &= ~R_DMA_TX_CTL_EN_MASK;
 180 }
 181
 182 static void msf2_phy_update_link(MSF2EmacState *s)
 183 {
 184     /* Autonegotiation status mirrors link status. */
 185     if (qemu_get_queue(s->nic)->link_down) {
 186         s->phy_regs[MII_BMSR] &= ~(MII_BMSR_AN_COMP |
 187                                    MII_BMSR_LINK_ST);
 188     } else {
 189         s->phy_regs[MII_BMSR] |= (MII_BMSR_AN_COMP |
 190                                   MII_BMSR_LINK_ST);
 191     }
 192 }
 193
 194 static void msf2_phy_reset(MSF2EmacState *s)
 195 {
 196     memset(&s->phy_regs[0], 0, sizeof(s->phy_regs));
 197     s->phy_regs[MII_BMCR] = 0x1140;
 198     s->phy_regs[MII_BMSR] = 0x7968;
 199     s->phy_regs[MII_PHYID1] = 0x0022;
 200     s->phy_regs[MII_PHYID2] = 0x1550;
 201     s->phy_regs[MII_ANAR] = 0x01E1;
 202     s->phy_regs[MII_ANLPAR] = 0xCDE1;
 203
 204     msf2_phy_update_link(s);
 205 }
 206
 207 static void write_to_phy(MSF2EmacState *s)
 208 {
 209     uint8_t reg_addr = s->regs[R_MII_ADDR] & R_MII_ADDR_REGADDR_MASK;
 210     uint8_t phy_addr = (s->regs[R_MII_ADDR] >> R_MII_ADDR_PHYADDR_SHIFT) &
 211                        R_MII_ADDR_REGADDR_MASK;
 212     uint16_t data = s->regs[R_MII_CTL] & 0xFFFF;
 213
 214     if (phy_addr != PHYADDR) {
 215         return;
 216     }
 217
 218     switch (reg_addr) {
 219     case MII_BMCR:
 220         if (data & MII_BMCR_RESET) {
 221             /* Phy reset */
 222             msf2_phy_reset(s);
 223             data &= ~MII_BMCR_RESET;
 224         }
 225         if (data & MII_BMCR_AUTOEN) {
 226             /* Complete autonegotiation immediately */
 227             data &= ~MII_BMCR_AUTOEN;
 228             s->phy_regs[MII_BMSR] |= MII_BMSR_AN_COMP;
 229         }
 230         break;
 231     }
 232
 233     s->phy_regs[reg_addr] = data;
 234 }
 235
 236 static uint16_t read_from_phy(MSF2EmacState *s)
 237 {
 238     uint8_t reg_addr = s->regs[R_MII_ADDR] & R_MII_ADDR_REGADDR_MASK;
 239     uint8_t phy_addr = (s->regs[R_MII_ADDR] >> R_MII_ADDR_PHYADDR_SHIFT) &
 240                        R_MII_ADDR_REGADDR_MASK;
 241
 242     if (phy_addr == PHYADDR) {
 243         return s->phy_regs[reg_addr];
 244     } else {
 245         return 0xFFFF;
 246     }
 247 }
 248
 249 static void msf2_emac_do_reset(MSF2EmacState *s)
 250 {
 251     memset(&s->regs[0], 0, sizeof(s->regs));
 252     s->regs[R_CFG1] = 0x80000000;
 253     s->regs[R_CFG2] = 0x00007000;
 254     s->regs[R_IFG] = 0x40605060;
 255     s->regs[R_HALF_DUPLEX] = 0x00A1F037;
 256     s->regs[R_MAX_FRAME_LENGTH] = 0x00000600;
 257     s->regs[R_FIFO_CFG5] = 0X3FFFF;
 258
 259     msf2_phy_reset(s);
 260 }
 261
 262 static uint64_t emac_read(void *opaque, hwaddr addr, unsigned int size)
 263 {
 264     MSF2EmacState *s = opaque;
 265     uint32_t r = 0;
 266
 267     addr >>= 2;
 268
 269     switch (addr) {
 270     case R_DMA_IRQ:
 271         r = emac_get_isr(s);
 272         break;
 273     default:
 274         if (addr >= ARRAY_SIZE(s->regs)) {
 275             qemu_log_mask(LOG_GUEST_ERROR,
 276                           "%s: Bad offset 0x%" HWADDR_PRIx "\n", __func__,
 277                           addr * 4);
 278             return r;
 279         }
 280         r = s->regs[addr];
 281         break;
 282     }
 283     return r;
 284 }
 285
 286 static void emac_write(void *opaque, hwaddr addr, uint64_t val64,
 287         unsigned int size)
 288 {
 289     MSF2EmacState *s = opaque;
 290     uint32_t value = val64;
 291     uint32_t enreqbits;
 292     uint8_t pktcnt;
 293
 294     addr >>= 2;
 295     switch (addr) {
 296     case R_DMA_TX_CTL:
 297         s->regs[addr] = value;
 298         if (value & R_DMA_TX_CTL_EN_MASK) {
 299             msf2_dma_tx(s);
 300         }
 301         break;
 302     case R_DMA_RX_CTL:
 303         s->regs[addr] = value;
 304         if (value & R_DMA_RX_CTL_EN_MASK) {
 305             s->rx_desc = s->regs[R_DMA_RX_DESC];
 306             qemu_flush_queued_packets(qemu_get_queue(s->nic));
 307         }
 308         break;
 309     case R_CFG1:
 310         s->regs[addr] = value;
 311         if (value & R_CFG1_RESET_MASK) {
 312             msf2_emac_do_reset(s);
 313         }
 314         break;
 315     case R_FIFO_CFG0:
 316        /*
 317         * For our implementation, turning on modules is instantaneous,
 318         * so the states requested via the *ENREQ bits appear in the
 319         * *ENRPLY bits immediately. Also the reset bits to reset PE-MCXMAC
 320         * module are not emulated here since it deals with start of frames,
 321         * inter-packet gap and control frames.
 322         */
 323         enreqbits = extract32(value, 8, 5);
 324         s->regs[addr] = deposit32(value, 16, 5, enreqbits);
 325         break;
 326     case R_DMA_TX_DESC:
 327         if (value & 0x3) {
 328             qemu_log_mask(LOG_GUEST_ERROR, "Tx Descriptor address should be"
 329                           " 32 bit aligned\n");
 330         }
 331         /* Ignore [1:0] bits */
 332         s->regs[addr] = value & ~3;
 333         break;
 334     case R_DMA_RX_DESC:
 335         if (value & 0x3) {
 336             qemu_log_mask(LOG_GUEST_ERROR, "Rx Descriptor address should be"
 337                           " 32 bit aligned\n");
 338         }
 339         /* Ignore [1:0] bits */
 340         s->regs[addr] = value & ~3;
 341         break;
 342     case R_DMA_TX_STATUS:
 343         if (value & R_DMA_TX_STATUS_UNDERRUN_MASK) {
 344             s->regs[addr] &= ~R_DMA_TX_STATUS_UNDERRUN_MASK;
 345         }
 346         if (value & R_DMA_TX_STATUS_PKT_SENT_MASK) {
 347             pktcnt = FIELD_EX32(s->regs[addr], DMA_TX_STATUS, PKTCNT);
 348             pktcnt--;
 349             s->regs[addr] = FIELD_DP32(s->regs[addr], DMA_TX_STATUS,
 350                                        PKTCNT, pktcnt);
 351             if (pktcnt == 0) {
 352                 s->regs[addr] &= ~R_DMA_TX_STATUS_PKT_SENT_MASK;
 353             }
 354         }
 355         break;
 356     case R_DMA_RX_STATUS:
 357         if (value & R_DMA_RX_STATUS_OVERFLOW_MASK) {
 358             s->regs[addr] &= ~R_DMA_RX_STATUS_OVERFLOW_MASK;
 359         }
 360         if (value & R_DMA_RX_STATUS_PKT_RCVD_MASK) {
 361             pktcnt = FIELD_EX32(s->regs[addr], DMA_RX_STATUS, PKTCNT);
 362             pktcnt--;
 363             s->regs[addr] = FIELD_DP32(s->regs[addr], DMA_RX_STATUS,
 364                                        PKTCNT, pktcnt);
 365             if (pktcnt == 0) {
 366                 s->regs[addr] &= ~R_DMA_RX_STATUS_PKT_RCVD_MASK;
 367             }
 368         }
 369         break;
 370     case R_DMA_IRQ:
 371         break;
 372     case R_MII_CMD:
 373         if (value & R_MII_CMD_READ_MASK) {
 374             s->regs[R_MII_STS] = read_from_phy(s);
 375         }
 376         break;
 377     case R_MII_CTL:
 378         s->regs[addr] = value;
 379         write_to_phy(s);
 380         break;
 381     case R_STA1:
 382         s->regs[addr] = value;
 383        /*
 384         * R_STA1 [31:24] : octet 1 of mac address
 385         * R_STA1 [23:16] : octet 2 of mac address
 386         * R_STA1 [15:8] : octet 3 of mac address
 387         * R_STA1 [7:0] : octet 4 of mac address
 388         */
 389         stl_be_p(s->mac_addr, value);
 390         break;
 391     case R_STA2:
 392         s->regs[addr] = value;
 393        /*
 394         * R_STA2 [31:24] : octet 5 of mac address
 395         * R_STA2 [23:16] : octet 6 of mac address
 396         */
 397         stw_be_p(s->mac_addr + 4, value >> 16);
 398         break;
 399     default:
 400         if (addr >= ARRAY_SIZE(s->regs)) {
 401             qemu_log_mask(LOG_GUEST_ERROR,
 402                           "%s: Bad offset 0x%" HWADDR_PRIx "\n", __func__,
 403                           addr * 4);
 404             return;
 405         }
 406         s->regs[addr] = value;
 407         break;
 408     }
 409     emac_update_irq(s);
 410 }
 411
 412 static const MemoryRegionOps emac_ops = {
 413     .read = emac_read,
 414     .write = emac_write,
 415     .endianness = DEVICE_NATIVE_ENDIAN,
 416     .impl = {
 417         .min_access_size = 4,
 418         .max_access_size = 4
 419     }
 420 };
 421
 422 static bool emac_can_rx(NetClientState *nc)
 423 {
 424     MSF2EmacState *s = qemu_get_nic_opaque(nc);
 425
 426     return (s->regs[R_CFG1] & R_CFG1_RX_EN_MASK) &&
 427            (s->regs[R_DMA_RX_CTL] & R_DMA_RX_CTL_EN_MASK);
 428 }
 429
 430 static bool addr_filter_ok(MSF2EmacState *s, const uint8_t *buf)
 431 {
 432     /* The broadcast MAC address: FF:FF:FF:FF:FF:FF */
 433     const uint8_t broadcast_addr[] = { 0xFF, 0xFF, 0xFF, 0xFF,
 434                                               0xFF, 0xFF };
 435     bool bcast_en = true;
 436     bool mcast_en = true;
 437
 438     if (s->regs[R_FIFO_CFG5] & R_FIFO_CFG5_BCAST_MASK) {
 439         bcast_en = true; /* Broadcast dont care for drop circuitry */
 440     } else if (s->regs[R_FIFO_CFG4] & R_FIFO_CFG4_BCAST_MASK) {
 441         bcast_en = false;
 442     }
 443
 444     if (s->regs[R_FIFO_CFG5] & R_FIFO_CFG5_MCAST_MASK) {
 445         mcast_en = true; /* Multicast dont care for drop circuitry */
 446     } else if (s->regs[R_FIFO_CFG4] & R_FIFO_CFG4_MCAST_MASK) {
 447         mcast_en = false;
 448     }
 449
 450     if (!memcmp(buf, broadcast_addr, sizeof(broadcast_addr))) {
 451         return bcast_en;
 452     }
 453
 454     if (buf[0] & 1) {
 455         return mcast_en;
 456     }
 457
 458     return !memcmp(buf, s->mac_addr, sizeof(s->mac_addr));
 459 }
 460
 461 static ssize_t emac_rx(NetClientState *nc, const uint8_t *buf, size_t size)
 462 {
 463     MSF2EmacState *s = qemu_get_nic_opaque(nc);
 464     EmacDesc d;
 465     uint8_t pktcnt;
 466     uint32_t status;
 467
 468     if (size > (s->regs[R_MAX_FRAME_LENGTH] & 0xFFFF)) {
 469         return size;
 470     }
 471     if (!addr_filter_ok(s, buf)) {
 472         return size;
 473     }
 474
 475     emac_load_desc(s, &d, s->rx_desc);
 476
 477     if (d.pktsize & EMPTY_MASK) {
 478         address_space_write(&s->dma_as, d.pktaddr, MEMTXATTRS_UNSPECIFIED,
 479                             buf, size & PKT_SIZE);
 480         d.pktsize = size & PKT_SIZE;
 481         emac_store_desc(s, &d, s->rx_desc);
 482         /* update received packets count */
 483         status = s->regs[R_DMA_RX_STATUS];
 484         pktcnt = FIELD_EX32(status, DMA_RX_STATUS, PKTCNT);
 485         pktcnt++;
 486         s->regs[R_DMA_RX_STATUS] = FIELD_DP32(status, DMA_RX_STATUS,
 487                                               PKTCNT, pktcnt);
 488         s->regs[R_DMA_RX_STATUS] |= R_DMA_RX_STATUS_PKT_RCVD_MASK;
 489         s->rx_desc = d.next;
 490     } else {
 491         s->regs[R_DMA_RX_CTL] &= ~R_DMA_RX_CTL_EN_MASK;
 492         s->regs[R_DMA_RX_STATUS] |= R_DMA_RX_STATUS_OVERFLOW_MASK;
 493     }
 494     emac_update_irq(s);
 495     return size;
 496 }
 497
 498 static void msf2_emac_reset(DeviceState *dev)
 499 {
 500     MSF2EmacState *s = MSS_EMAC(dev);
 501
 502     msf2_emac_do_reset(s);
 503 }
 504
 505 static void emac_set_link(NetClientState *nc)
 506 {
 507     MSF2EmacState *s = qemu_get_nic_opaque(nc);
 508
 509     msf2_phy_update_link(s);
 510 }
 511
 512 static NetClientInfo net_msf2_emac_info = {
 513     .type = NET_CLIENT_DRIVER_NIC,
 514     .size = sizeof(NICState),
 515     .can_receive = emac_can_rx,
 516     .receive = emac_rx,
 517     .link_status_changed = emac_set_link,
 518 };
 519
 520 static void msf2_emac_realize(DeviceState *dev, Error **errp)
 521 {
 522     MSF2EmacState *s = MSS_EMAC(dev);
 523
 524     if (!s->dma_mr) {
 525         error_setg(errp, "MSS_EMAC 'ahb-bus' link not set");
 526         return;
 527     }
 528
 529     address_space_init(&s->dma_as, s->dma_mr, "emac-ahb");
 530
 531     qemu_macaddr_default_if_unset(&s->conf.macaddr);
 532     s->nic = qemu_new_nic(&net_msf2_emac_info, &s->conf,
 533                           object_get_typename(OBJECT(dev)), dev->id,
 534                           &dev->mem_reentrancy_guard, s);
 535     qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
 536 }
 537
 538 static void msf2_emac_init(Object *obj)
 539 {
 540     MSF2EmacState *s = MSS_EMAC(obj);
 541
 542     sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq);
 543
 544     memory_region_init_io(&s->mmio, obj, &emac_ops, s,
 545                           "msf2-emac", R_MAX * 4);
 546     sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
 547 }
 548
 549 static Property msf2_emac_properties[] = {
 550     DEFINE_PROP_LINK("ahb-bus", MSF2EmacState, dma_mr,
 551                      TYPE_MEMORY_REGION, MemoryRegion *),
 552     DEFINE_NIC_PROPERTIES(MSF2EmacState, conf),
 553     DEFINE_PROP_END_OF_LIST(),
 554 };
 555
 556 static const VMStateDescription vmstate_msf2_emac = {
 557     .name = TYPE_MSS_EMAC,
 558     .version_id = 1,
 559     .minimum_version_id = 1,
 560     .fields = (const VMStateField[]) {
 561         VMSTATE_UINT8_ARRAY(mac_addr, MSF2EmacState, ETH_ALEN),
 562         VMSTATE_UINT32(rx_desc, MSF2EmacState),
 563         VMSTATE_UINT16_ARRAY(phy_regs, MSF2EmacState, PHY_MAX_REGS),
 564         VMSTATE_UINT32_ARRAY(regs, MSF2EmacState, R_MAX),
 565         VMSTATE_END_OF_LIST()
 566     }
 567 };
 568
 569 static void msf2_emac_class_init(ObjectClass *klass, void *data)
 570 {
 571     DeviceClass *dc = DEVICE_CLASS(klass);
 572
 573     dc->realize = msf2_emac_realize;
 574     dc->reset = msf2_emac_reset;
 575     dc->vmsd = &vmstate_msf2_emac;
 576     device_class_set_props(dc, msf2_emac_properties);
 577 }
 578
 579 static const TypeInfo msf2_emac_info = {
 580     .name          = TYPE_MSS_EMAC,
 581     .parent        = TYPE_SYS_BUS_DEVICE,
 582     .instance_size = sizeof(MSF2EmacState),
 583     .instance_init = msf2_emac_init,
 584     .class_init    = msf2_emac_class_init,
 585 };
 586
 587 static void msf2_emac_register_types(void)
 588 {
 589     type_register_static(&msf2_emac_info);
 590 }
 591
 592 type_init(msf2_emac_register_types)