1 /* 2 * OpenCores Ethernet MAC 10/100 + subset of 3 * National Semiconductors DP83848C 10/100 PHY 4 * 5 * http://opencores.org/svnget,ethmac?file=%2Ftrunk%2F%2Fdoc%2Feth_speci.pdf 6 * http://cache.national.com/ds/DP/DP83848C.pdf 7 * 8 * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions are met: 13 * * Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * * Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * * Neither the name of the Open Source and Linux Lab nor the 19 * names of its contributors may be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 26 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 29 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include "qemu/osdep.h" 35 #include "hw/hw.h" 36 #include "hw/net/mii.h" 37 #include "hw/sysbus.h" 38 #include "net/net.h" 39 #include "net/eth.h" 40 #include "sysemu/sysemu.h" 41 #include "trace.h" 42 43 /* RECSMALL is not used because it breaks tap networking in linux: 44 * incoming ARP responses are too short 45 */ 46 #undef USE_RECSMALL 47 48 #define GET_FIELD(v, field) (((v) & (field)) >> (field ## _LBN)) 49 #define GET_REGBIT(s, reg, field) ((s)->regs[reg] & (reg ## _ ## field)) 50 #define GET_REGFIELD(s, reg, field) \ 51 GET_FIELD((s)->regs[reg], reg ## _ ## field) 52 53 #define SET_FIELD(v, field, data) \ 54 ((v) = (((v) & ~(field)) | (((data) << (field ## _LBN)) & (field)))) 55 #define SET_REGFIELD(s, reg, field, data) \ 56 SET_FIELD((s)->regs[reg], reg ## _ ## field, data) 57 58 /* PHY MII registers */ 59 enum { 60 MII_REG_MAX = 16, 61 }; 62 63 typedef struct Mii { 64 uint16_t regs[MII_REG_MAX]; 65 bool link_ok; 66 } Mii; 67 68 static void mii_set_link(Mii *s, bool link_ok) 69 { 70 if (link_ok) { 71 s->regs[MII_BMSR] |= MII_BMSR_LINK_ST; 72 s->regs[MII_ANLPAR] |= MII_ANLPAR_TXFD | MII_ANLPAR_TX | 73 MII_ANLPAR_10FD | MII_ANLPAR_10 | MII_ANLPAR_CSMACD; 74 } else { 75 s->regs[MII_BMSR] &= ~MII_BMSR_LINK_ST; 76 s->regs[MII_ANLPAR] &= 0x01ff; 77 } 78 s->link_ok = link_ok; 79 } 80 81 static void mii_reset(Mii *s) 82 { 83 memset(s->regs, 0, sizeof(s->regs)); 84 s->regs[MII_BMCR] = MII_BMCR_AUTOEN; 85 s->regs[MII_BMSR] = MII_BMSR_100TX_FD | MII_BMSR_100TX_HD | 86 MII_BMSR_10T_FD | MII_BMSR_10T_HD | MII_BMSR_MFPS | 87 MII_BMSR_AN_COMP | MII_BMSR_AUTONEG; 88 s->regs[MII_PHYID1] = 0x2000; 89 s->regs[MII_PHYID2] = 0x5c90; 90 s->regs[MII_ANAR] = MII_ANAR_TXFD | MII_ANAR_TX | 91 MII_ANAR_10FD | MII_ANAR_10 | MII_ANAR_CSMACD; 92 mii_set_link(s, s->link_ok); 93 } 94 95 static void mii_ro(Mii *s, uint16_t v) 96 { 97 } 98 99 static void mii_write_bmcr(Mii *s, uint16_t v) 100 { 101 if (v & MII_BMCR_RESET) { 102 mii_reset(s); 103 } else { 104 s->regs[MII_BMCR] = v; 105 } 106 } 107 108 static void mii_write_host(Mii *s, unsigned idx, uint16_t v) 109 { 110 static void (*reg_write[MII_REG_MAX])(Mii *s, uint16_t v) = { 111 [MII_BMCR] = mii_write_bmcr, 112 [MII_BMSR] = mii_ro, 113 [MII_PHYID1] = mii_ro, 114 [MII_PHYID2] = mii_ro, 115 }; 116 117 if (idx < MII_REG_MAX) { 118 trace_open_eth_mii_write(idx, v); 119 if (reg_write[idx]) { 120 reg_write[idx](s, v); 121 } else { 122 s->regs[idx] = v; 123 } 124 } 125 } 126 127 static uint16_t mii_read_host(Mii *s, unsigned idx) 128 { 129 trace_open_eth_mii_read(idx, s->regs[idx]); 130 return s->regs[idx]; 131 } 132 133 /* OpenCores Ethernet registers */ 134 enum { 135 MODER, 136 INT_SOURCE, 137 INT_MASK, 138 IPGT, 139 IPGR1, 140 IPGR2, 141 PACKETLEN, 142 COLLCONF, 143 TX_BD_NUM, 144 CTRLMODER, 145 MIIMODER, 146 MIICOMMAND, 147 MIIADDRESS, 148 MIITX_DATA, 149 MIIRX_DATA, 150 MIISTATUS, 151 MAC_ADDR0, 152 MAC_ADDR1, 153 HASH0, 154 HASH1, 155 TXCTRL, 156 REG_MAX, 157 }; 158 159 enum { 160 MODER_RECSMALL = 0x10000, 161 MODER_PAD = 0x8000, 162 MODER_HUGEN = 0x4000, 163 MODER_RST = 0x800, 164 MODER_LOOPBCK = 0x80, 165 MODER_PRO = 0x20, 166 MODER_IAM = 0x10, 167 MODER_BRO = 0x8, 168 MODER_TXEN = 0x2, 169 MODER_RXEN = 0x1, 170 }; 171 172 enum { 173 INT_SOURCE_BUSY = 0x10, 174 INT_SOURCE_RXB = 0x4, 175 INT_SOURCE_TXB = 0x1, 176 }; 177 178 enum { 179 PACKETLEN_MINFL = 0xffff0000, 180 PACKETLEN_MINFL_LBN = 16, 181 PACKETLEN_MAXFL = 0xffff, 182 PACKETLEN_MAXFL_LBN = 0, 183 }; 184 185 enum { 186 MIICOMMAND_WCTRLDATA = 0x4, 187 MIICOMMAND_RSTAT = 0x2, 188 MIICOMMAND_SCANSTAT = 0x1, 189 }; 190 191 enum { 192 MIIADDRESS_RGAD = 0x1f00, 193 MIIADDRESS_RGAD_LBN = 8, 194 MIIADDRESS_FIAD = 0x1f, 195 MIIADDRESS_FIAD_LBN = 0, 196 }; 197 198 enum { 199 MIITX_DATA_CTRLDATA = 0xffff, 200 MIITX_DATA_CTRLDATA_LBN = 0, 201 }; 202 203 enum { 204 MIIRX_DATA_PRSD = 0xffff, 205 MIIRX_DATA_PRSD_LBN = 0, 206 }; 207 208 enum { 209 MIISTATUS_LINKFAIL = 0x1, 210 MIISTATUS_LINKFAIL_LBN = 0, 211 }; 212 213 enum { 214 MAC_ADDR0_BYTE2 = 0xff000000, 215 MAC_ADDR0_BYTE2_LBN = 24, 216 MAC_ADDR0_BYTE3 = 0xff0000, 217 MAC_ADDR0_BYTE3_LBN = 16, 218 MAC_ADDR0_BYTE4 = 0xff00, 219 MAC_ADDR0_BYTE4_LBN = 8, 220 MAC_ADDR0_BYTE5 = 0xff, 221 MAC_ADDR0_BYTE5_LBN = 0, 222 }; 223 224 enum { 225 MAC_ADDR1_BYTE0 = 0xff00, 226 MAC_ADDR1_BYTE0_LBN = 8, 227 MAC_ADDR1_BYTE1 = 0xff, 228 MAC_ADDR1_BYTE1_LBN = 0, 229 }; 230 231 enum { 232 TXD_LEN = 0xffff0000, 233 TXD_LEN_LBN = 16, 234 TXD_RD = 0x8000, 235 TXD_IRQ = 0x4000, 236 TXD_WR = 0x2000, 237 TXD_PAD = 0x1000, 238 TXD_CRC = 0x800, 239 TXD_UR = 0x100, 240 TXD_RTRY = 0xf0, 241 TXD_RTRY_LBN = 4, 242 TXD_RL = 0x8, 243 TXD_LC = 0x4, 244 TXD_DF = 0x2, 245 TXD_CS = 0x1, 246 }; 247 248 enum { 249 RXD_LEN = 0xffff0000, 250 RXD_LEN_LBN = 16, 251 RXD_E = 0x8000, 252 RXD_IRQ = 0x4000, 253 RXD_WRAP = 0x2000, 254 RXD_CF = 0x100, 255 RXD_M = 0x80, 256 RXD_OR = 0x40, 257 RXD_IS = 0x20, 258 RXD_DN = 0x10, 259 RXD_TL = 0x8, 260 RXD_SF = 0x4, 261 RXD_CRC = 0x2, 262 RXD_LC = 0x1, 263 }; 264 265 typedef struct desc { 266 uint32_t len_flags; 267 uint32_t buf_ptr; 268 } desc; 269 270 #define DEFAULT_PHY 1 271 272 #define TYPE_OPEN_ETH "open_eth" 273 #define OPEN_ETH(obj) OBJECT_CHECK(OpenEthState, (obj), TYPE_OPEN_ETH) 274 275 typedef struct OpenEthState { 276 SysBusDevice parent_obj; 277 278 NICState *nic; 279 NICConf conf; 280 MemoryRegion reg_io; 281 MemoryRegion desc_io; 282 qemu_irq irq; 283 284 Mii mii; 285 uint32_t regs[REG_MAX]; 286 unsigned tx_desc; 287 unsigned rx_desc; 288 desc desc[128]; 289 } OpenEthState; 290 291 static desc *rx_desc(OpenEthState *s) 292 { 293 return s->desc + s->rx_desc; 294 } 295 296 static desc *tx_desc(OpenEthState *s) 297 { 298 return s->desc + s->tx_desc; 299 } 300 301 static void open_eth_update_irq(OpenEthState *s, 302 uint32_t old, uint32_t new) 303 { 304 if (!old != !new) { 305 trace_open_eth_update_irq(new); 306 qemu_set_irq(s->irq, new); 307 } 308 } 309 310 static void open_eth_int_source_write(OpenEthState *s, 311 uint32_t val) 312 { 313 uint32_t old_val = s->regs[INT_SOURCE]; 314 315 s->regs[INT_SOURCE] = val; 316 open_eth_update_irq(s, old_val & s->regs[INT_MASK], 317 s->regs[INT_SOURCE] & s->regs[INT_MASK]); 318 } 319 320 static void open_eth_set_link_status(NetClientState *nc) 321 { 322 OpenEthState *s = qemu_get_nic_opaque(nc); 323 324 if (GET_REGBIT(s, MIICOMMAND, SCANSTAT)) { 325 SET_REGFIELD(s, MIISTATUS, LINKFAIL, nc->link_down); 326 } 327 mii_set_link(&s->mii, !nc->link_down); 328 } 329 330 static void open_eth_reset(void *opaque) 331 { 332 OpenEthState *s = opaque; 333 334 memset(s->regs, 0, sizeof(s->regs)); 335 s->regs[MODER] = 0xa000; 336 s->regs[IPGT] = 0x12; 337 s->regs[IPGR1] = 0xc; 338 s->regs[IPGR2] = 0x12; 339 s->regs[PACKETLEN] = 0x400600; 340 s->regs[COLLCONF] = 0xf003f; 341 s->regs[TX_BD_NUM] = 0x40; 342 s->regs[MIIMODER] = 0x64; 343 344 s->tx_desc = 0; 345 s->rx_desc = 0x40; 346 347 mii_reset(&s->mii); 348 open_eth_set_link_status(qemu_get_queue(s->nic)); 349 } 350 351 static int open_eth_can_receive(NetClientState *nc) 352 { 353 OpenEthState *s = qemu_get_nic_opaque(nc); 354 355 return GET_REGBIT(s, MODER, RXEN) && 356 (s->regs[TX_BD_NUM] < 0x80); 357 } 358 359 static ssize_t open_eth_receive(NetClientState *nc, 360 const uint8_t *buf, size_t size) 361 { 362 OpenEthState *s = qemu_get_nic_opaque(nc); 363 size_t maxfl = GET_REGFIELD(s, PACKETLEN, MAXFL); 364 size_t minfl = GET_REGFIELD(s, PACKETLEN, MINFL); 365 size_t fcsl = 4; 366 bool miss = true; 367 368 trace_open_eth_receive((unsigned)size); 369 370 if (size >= 6) { 371 static const uint8_t bcast_addr[] = { 372 0xff, 0xff, 0xff, 0xff, 0xff, 0xff 373 }; 374 if (memcmp(buf, bcast_addr, sizeof(bcast_addr)) == 0) { 375 miss = GET_REGBIT(s, MODER, BRO); 376 } else if ((buf[0] & 0x1) || GET_REGBIT(s, MODER, IAM)) { 377 unsigned mcast_idx = net_crc32(buf, ETH_ALEN) >> 26; 378 miss = !(s->regs[HASH0 + mcast_idx / 32] & 379 (1 << (mcast_idx % 32))); 380 trace_open_eth_receive_mcast( 381 mcast_idx, s->regs[HASH0], s->regs[HASH1]); 382 } else { 383 miss = GET_REGFIELD(s, MAC_ADDR1, BYTE0) != buf[0] || 384 GET_REGFIELD(s, MAC_ADDR1, BYTE1) != buf[1] || 385 GET_REGFIELD(s, MAC_ADDR0, BYTE2) != buf[2] || 386 GET_REGFIELD(s, MAC_ADDR0, BYTE3) != buf[3] || 387 GET_REGFIELD(s, MAC_ADDR0, BYTE4) != buf[4] || 388 GET_REGFIELD(s, MAC_ADDR0, BYTE5) != buf[5]; 389 } 390 } 391 392 if (miss && !GET_REGBIT(s, MODER, PRO)) { 393 trace_open_eth_receive_reject(); 394 return size; 395 } 396 397 #ifdef USE_RECSMALL 398 if (GET_REGBIT(s, MODER, RECSMALL) || size >= minfl) { 399 #else 400 { 401 #endif 402 static const uint8_t zero[64] = {0}; 403 desc *desc = rx_desc(s); 404 size_t copy_size = GET_REGBIT(s, MODER, HUGEN) ? 65536 : maxfl; 405 406 if (!(desc->len_flags & RXD_E)) { 407 open_eth_int_source_write(s, 408 s->regs[INT_SOURCE] | INT_SOURCE_BUSY); 409 return size; 410 } 411 412 desc->len_flags &= ~(RXD_CF | RXD_M | RXD_OR | 413 RXD_IS | RXD_DN | RXD_TL | RXD_SF | RXD_CRC | RXD_LC); 414 415 if (copy_size > size) { 416 copy_size = size; 417 } else { 418 fcsl = 0; 419 } 420 if (miss) { 421 desc->len_flags |= RXD_M; 422 } 423 if (GET_REGBIT(s, MODER, HUGEN) && size > maxfl) { 424 desc->len_flags |= RXD_TL; 425 } 426 #ifdef USE_RECSMALL 427 if (size < minfl) { 428 desc->len_flags |= RXD_SF; 429 } 430 #endif 431 432 cpu_physical_memory_write(desc->buf_ptr, buf, copy_size); 433 434 if (GET_REGBIT(s, MODER, PAD) && copy_size < minfl) { 435 if (minfl - copy_size > fcsl) { 436 fcsl = 0; 437 } else { 438 fcsl -= minfl - copy_size; 439 } 440 while (copy_size < minfl) { 441 size_t zero_sz = minfl - copy_size < sizeof(zero) ? 442 minfl - copy_size : sizeof(zero); 443 444 cpu_physical_memory_write(desc->buf_ptr + copy_size, 445 zero, zero_sz); 446 copy_size += zero_sz; 447 } 448 } 449 450 /* There's no FCS in the frames handed to us by the QEMU, zero fill it. 451 * Don't do it if the frame is cut at the MAXFL or padded with 4 or 452 * more bytes to the MINFL. 453 */ 454 cpu_physical_memory_write(desc->buf_ptr + copy_size, zero, fcsl); 455 copy_size += fcsl; 456 457 SET_FIELD(desc->len_flags, RXD_LEN, copy_size); 458 459 if ((desc->len_flags & RXD_WRAP) || s->rx_desc == 0x7f) { 460 s->rx_desc = s->regs[TX_BD_NUM]; 461 } else { 462 ++s->rx_desc; 463 } 464 desc->len_flags &= ~RXD_E; 465 466 trace_open_eth_receive_desc(desc->buf_ptr, desc->len_flags); 467 468 if (desc->len_flags & RXD_IRQ) { 469 open_eth_int_source_write(s, 470 s->regs[INT_SOURCE] | INT_SOURCE_RXB); 471 } 472 } 473 return size; 474 } 475 476 static NetClientInfo net_open_eth_info = { 477 .type = NET_CLIENT_DRIVER_NIC, 478 .size = sizeof(NICState), 479 .can_receive = open_eth_can_receive, 480 .receive = open_eth_receive, 481 .link_status_changed = open_eth_set_link_status, 482 }; 483 484 static void open_eth_start_xmit(OpenEthState *s, desc *tx) 485 { 486 uint8_t *buf = NULL; 487 uint8_t buffer[0x600]; 488 unsigned len = GET_FIELD(tx->len_flags, TXD_LEN); 489 unsigned tx_len = len; 490 491 if ((tx->len_flags & TXD_PAD) && 492 tx_len < GET_REGFIELD(s, PACKETLEN, MINFL)) { 493 tx_len = GET_REGFIELD(s, PACKETLEN, MINFL); 494 } 495 if (!GET_REGBIT(s, MODER, HUGEN) && 496 tx_len > GET_REGFIELD(s, PACKETLEN, MAXFL)) { 497 tx_len = GET_REGFIELD(s, PACKETLEN, MAXFL); 498 } 499 500 trace_open_eth_start_xmit(tx->buf_ptr, len, tx_len); 501 502 if (tx_len > sizeof(buffer)) { 503 buf = g_new(uint8_t, tx_len); 504 } else { 505 buf = buffer; 506 } 507 if (len > tx_len) { 508 len = tx_len; 509 } 510 cpu_physical_memory_read(tx->buf_ptr, buf, len); 511 if (tx_len > len) { 512 memset(buf + len, 0, tx_len - len); 513 } 514 qemu_send_packet(qemu_get_queue(s->nic), buf, tx_len); 515 if (tx_len > sizeof(buffer)) { 516 g_free(buf); 517 } 518 519 if (tx->len_flags & TXD_WR) { 520 s->tx_desc = 0; 521 } else { 522 ++s->tx_desc; 523 if (s->tx_desc >= s->regs[TX_BD_NUM]) { 524 s->tx_desc = 0; 525 } 526 } 527 tx->len_flags &= ~(TXD_RD | TXD_UR | 528 TXD_RTRY | TXD_RL | TXD_LC | TXD_DF | TXD_CS); 529 if (tx->len_flags & TXD_IRQ) { 530 open_eth_int_source_write(s, s->regs[INT_SOURCE] | INT_SOURCE_TXB); 531 } 532 533 } 534 535 static void open_eth_check_start_xmit(OpenEthState *s) 536 { 537 desc *tx = tx_desc(s); 538 if (GET_REGBIT(s, MODER, TXEN) && s->regs[TX_BD_NUM] > 0 && 539 (tx->len_flags & TXD_RD) && 540 GET_FIELD(tx->len_flags, TXD_LEN) > 4) { 541 open_eth_start_xmit(s, tx); 542 } 543 } 544 545 static uint64_t open_eth_reg_read(void *opaque, 546 hwaddr addr, unsigned int size) 547 { 548 static uint32_t (*reg_read[REG_MAX])(OpenEthState *s) = { 549 }; 550 OpenEthState *s = opaque; 551 unsigned idx = addr / 4; 552 uint64_t v = 0; 553 554 if (idx < REG_MAX) { 555 if (reg_read[idx]) { 556 v = reg_read[idx](s); 557 } else { 558 v = s->regs[idx]; 559 } 560 } 561 trace_open_eth_reg_read((uint32_t)addr, (uint32_t)v); 562 return v; 563 } 564 565 static void open_eth_notify_can_receive(OpenEthState *s) 566 { 567 NetClientState *nc = qemu_get_queue(s->nic); 568 569 if (open_eth_can_receive(nc)) { 570 qemu_flush_queued_packets(nc); 571 } 572 } 573 574 static void open_eth_ro(OpenEthState *s, uint32_t val) 575 { 576 } 577 578 static void open_eth_moder_host_write(OpenEthState *s, uint32_t val) 579 { 580 uint32_t set = val & ~s->regs[MODER]; 581 582 if (set & MODER_RST) { 583 open_eth_reset(s); 584 } 585 586 s->regs[MODER] = val; 587 588 if (set & MODER_RXEN) { 589 s->rx_desc = s->regs[TX_BD_NUM]; 590 open_eth_notify_can_receive(s); 591 } 592 if (set & MODER_TXEN) { 593 s->tx_desc = 0; 594 open_eth_check_start_xmit(s); 595 } 596 } 597 598 static void open_eth_int_source_host_write(OpenEthState *s, uint32_t val) 599 { 600 uint32_t old = s->regs[INT_SOURCE]; 601 602 s->regs[INT_SOURCE] &= ~val; 603 open_eth_update_irq(s, old & s->regs[INT_MASK], 604 s->regs[INT_SOURCE] & s->regs[INT_MASK]); 605 } 606 607 static void open_eth_int_mask_host_write(OpenEthState *s, uint32_t val) 608 { 609 uint32_t old = s->regs[INT_MASK]; 610 611 s->regs[INT_MASK] = val; 612 open_eth_update_irq(s, s->regs[INT_SOURCE] & old, 613 s->regs[INT_SOURCE] & s->regs[INT_MASK]); 614 } 615 616 static void open_eth_tx_bd_num_host_write(OpenEthState *s, uint32_t val) 617 { 618 if (val < 0x80) { 619 bool enable = s->regs[TX_BD_NUM] == 0x80; 620 621 s->regs[TX_BD_NUM] = val; 622 if (enable) { 623 open_eth_notify_can_receive(s); 624 } 625 } 626 } 627 628 static void open_eth_mii_command_host_write(OpenEthState *s, uint32_t val) 629 { 630 unsigned fiad = GET_REGFIELD(s, MIIADDRESS, FIAD); 631 unsigned rgad = GET_REGFIELD(s, MIIADDRESS, RGAD); 632 633 if (val & MIICOMMAND_WCTRLDATA) { 634 if (fiad == DEFAULT_PHY) { 635 mii_write_host(&s->mii, rgad, 636 GET_REGFIELD(s, MIITX_DATA, CTRLDATA)); 637 } 638 } 639 if (val & MIICOMMAND_RSTAT) { 640 if (fiad == DEFAULT_PHY) { 641 SET_REGFIELD(s, MIIRX_DATA, PRSD, 642 mii_read_host(&s->mii, rgad)); 643 } else { 644 s->regs[MIIRX_DATA] = 0xffff; 645 } 646 SET_REGFIELD(s, MIISTATUS, LINKFAIL, qemu_get_queue(s->nic)->link_down); 647 } 648 } 649 650 static void open_eth_mii_tx_host_write(OpenEthState *s, uint32_t val) 651 { 652 SET_REGFIELD(s, MIITX_DATA, CTRLDATA, val); 653 if (GET_REGFIELD(s, MIIADDRESS, FIAD) == DEFAULT_PHY) { 654 mii_write_host(&s->mii, GET_REGFIELD(s, MIIADDRESS, RGAD), 655 GET_REGFIELD(s, MIITX_DATA, CTRLDATA)); 656 } 657 } 658 659 static void open_eth_reg_write(void *opaque, 660 hwaddr addr, uint64_t val, unsigned int size) 661 { 662 static void (*reg_write[REG_MAX])(OpenEthState *s, uint32_t val) = { 663 [MODER] = open_eth_moder_host_write, 664 [INT_SOURCE] = open_eth_int_source_host_write, 665 [INT_MASK] = open_eth_int_mask_host_write, 666 [TX_BD_NUM] = open_eth_tx_bd_num_host_write, 667 [MIICOMMAND] = open_eth_mii_command_host_write, 668 [MIITX_DATA] = open_eth_mii_tx_host_write, 669 [MIISTATUS] = open_eth_ro, 670 }; 671 OpenEthState *s = opaque; 672 unsigned idx = addr / 4; 673 674 if (idx < REG_MAX) { 675 trace_open_eth_reg_write((uint32_t)addr, (uint32_t)val); 676 if (reg_write[idx]) { 677 reg_write[idx](s, val); 678 } else { 679 s->regs[idx] = val; 680 } 681 } 682 } 683 684 static uint64_t open_eth_desc_read(void *opaque, 685 hwaddr addr, unsigned int size) 686 { 687 OpenEthState *s = opaque; 688 uint64_t v = 0; 689 690 addr &= 0x3ff; 691 memcpy(&v, (uint8_t *)s->desc + addr, size); 692 trace_open_eth_desc_read((uint32_t)addr, (uint32_t)v); 693 return v; 694 } 695 696 static void open_eth_desc_write(void *opaque, 697 hwaddr addr, uint64_t val, unsigned int size) 698 { 699 OpenEthState *s = opaque; 700 701 addr &= 0x3ff; 702 trace_open_eth_desc_write((uint32_t)addr, (uint32_t)val); 703 memcpy((uint8_t *)s->desc + addr, &val, size); 704 open_eth_check_start_xmit(s); 705 } 706 707 708 static const MemoryRegionOps open_eth_reg_ops = { 709 .read = open_eth_reg_read, 710 .write = open_eth_reg_write, 711 }; 712 713 static const MemoryRegionOps open_eth_desc_ops = { 714 .read = open_eth_desc_read, 715 .write = open_eth_desc_write, 716 }; 717 718 static int sysbus_open_eth_init(SysBusDevice *sbd) 719 { 720 DeviceState *dev = DEVICE(sbd); 721 OpenEthState *s = OPEN_ETH(dev); 722 723 memory_region_init_io(&s->reg_io, OBJECT(dev), &open_eth_reg_ops, s, 724 "open_eth.regs", 0x54); 725 sysbus_init_mmio(sbd, &s->reg_io); 726 727 memory_region_init_io(&s->desc_io, OBJECT(dev), &open_eth_desc_ops, s, 728 "open_eth.desc", 0x400); 729 sysbus_init_mmio(sbd, &s->desc_io); 730 731 sysbus_init_irq(sbd, &s->irq); 732 733 s->nic = qemu_new_nic(&net_open_eth_info, &s->conf, 734 object_get_typename(OBJECT(s)), dev->id, s); 735 return 0; 736 } 737 738 static void qdev_open_eth_reset(DeviceState *dev) 739 { 740 OpenEthState *d = OPEN_ETH(dev); 741 742 open_eth_reset(d); 743 } 744 745 static Property open_eth_properties[] = { 746 DEFINE_NIC_PROPERTIES(OpenEthState, conf), 747 DEFINE_PROP_END_OF_LIST(), 748 }; 749 750 static void open_eth_class_init(ObjectClass *klass, void *data) 751 { 752 DeviceClass *dc = DEVICE_CLASS(klass); 753 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); 754 755 k->init = sysbus_open_eth_init; 756 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 757 dc->desc = "Opencores 10/100 Mbit Ethernet"; 758 dc->reset = qdev_open_eth_reset; 759 dc->props = open_eth_properties; 760 } 761 762 static const TypeInfo open_eth_info = { 763 .name = TYPE_OPEN_ETH, 764 .parent = TYPE_SYS_BUS_DEVICE, 765 .instance_size = sizeof(OpenEthState), 766 .class_init = open_eth_class_init, 767 }; 768 769 static void open_eth_register_types(void) 770 { 771 type_register_static(&open_eth_info); 772 } 773 774 type_init(open_eth_register_types) 775