1 /* 2 * QEMU model of SUN GEM ethernet controller 3 * 4 * As found in Apple ASICs among others 5 * 6 * Copyright 2016 Ben Herrenschmidt 7 * Copyright 2017 Mark Cave-Ayland 8 */ 9 10 #include "qemu/osdep.h" 11 #include "hw/pci/pci.h" 12 #include "qemu/log.h" 13 #include "qemu/module.h" 14 #include "net/net.h" 15 #include "net/eth.h" 16 #include "net/checksum.h" 17 #include "hw/net/mii.h" 18 #include "sysemu/sysemu.h" 19 #include "trace.h" 20 21 #define TYPE_SUNGEM "sungem" 22 23 #define SUNGEM(obj) OBJECT_CHECK(SunGEMState, (obj), TYPE_SUNGEM) 24 25 #define MAX_PACKET_SIZE 9016 26 27 #define SUNGEM_MMIO_SIZE 0x200000 28 29 /* Global registers */ 30 #define SUNGEM_MMIO_GREG_SIZE 0x2000 31 32 #define GREG_SEBSTATE 0x0000UL /* SEB State Register */ 33 34 #define GREG_STAT 0x000CUL /* Status Register */ 35 #define GREG_STAT_TXINTME 0x00000001 /* TX INTME frame transferred */ 36 #define GREG_STAT_TXALL 0x00000002 /* All TX frames transferred */ 37 #define GREG_STAT_TXDONE 0x00000004 /* One TX frame transferred */ 38 #define GREG_STAT_RXDONE 0x00000010 /* One RX frame arrived */ 39 #define GREG_STAT_RXNOBUF 0x00000020 /* No free RX buffers available */ 40 #define GREG_STAT_RXTAGERR 0x00000040 /* RX tag framing is corrupt */ 41 #define GREG_STAT_TXMAC 0x00004000 /* TX MAC signalled interrupt */ 42 #define GREG_STAT_RXMAC 0x00008000 /* RX MAC signalled interrupt */ 43 #define GREG_STAT_MAC 0x00010000 /* MAC Control signalled irq */ 44 #define GREG_STAT_TXNR 0xfff80000 /* == TXDMA_TXDONE reg val */ 45 #define GREG_STAT_TXNR_SHIFT 19 46 47 /* These interrupts are edge latches in the status register, 48 * reading it (or writing the corresponding bit in IACK) will 49 * clear them 50 */ 51 #define GREG_STAT_LATCH (GREG_STAT_TXALL | GREG_STAT_TXINTME | \ 52 GREG_STAT_RXDONE | GREG_STAT_RXDONE | \ 53 GREG_STAT_RXNOBUF | GREG_STAT_RXTAGERR) 54 55 #define GREG_IMASK 0x0010UL /* Interrupt Mask Register */ 56 #define GREG_IACK 0x0014UL /* Interrupt ACK Register */ 57 #define GREG_STAT2 0x001CUL /* Alias of GREG_STAT */ 58 #define GREG_PCIESTAT 0x1000UL /* PCI Error Status Register */ 59 #define GREG_PCIEMASK 0x1004UL /* PCI Error Mask Register */ 60 61 #define GREG_SWRST 0x1010UL /* Software Reset Register */ 62 #define GREG_SWRST_TXRST 0x00000001 /* TX Software Reset */ 63 #define GREG_SWRST_RXRST 0x00000002 /* RX Software Reset */ 64 #define GREG_SWRST_RSTOUT 0x00000004 /* Force RST# pin active */ 65 66 /* TX DMA Registers */ 67 #define SUNGEM_MMIO_TXDMA_SIZE 0x1000 68 69 #define TXDMA_KICK 0x0000UL /* TX Kick Register */ 70 71 #define TXDMA_CFG 0x0004UL /* TX Configuration Register */ 72 #define TXDMA_CFG_ENABLE 0x00000001 /* Enable TX DMA channel */ 73 #define TXDMA_CFG_RINGSZ 0x0000001e /* TX descriptor ring size */ 74 75 #define TXDMA_DBLOW 0x0008UL /* TX Desc. Base Low */ 76 #define TXDMA_DBHI 0x000CUL /* TX Desc. Base High */ 77 #define TXDMA_PCNT 0x0024UL /* TX FIFO Packet Counter */ 78 #define TXDMA_SMACHINE 0x0028UL /* TX State Machine Register */ 79 #define TXDMA_DPLOW 0x0030UL /* TX Data Pointer Low */ 80 #define TXDMA_DPHI 0x0034UL /* TX Data Pointer High */ 81 #define TXDMA_TXDONE 0x0100UL /* TX Completion Register */ 82 #define TXDMA_FTAG 0x0108UL /* TX FIFO Tag */ 83 #define TXDMA_FSZ 0x0118UL /* TX FIFO Size */ 84 85 /* Receive DMA Registers */ 86 #define SUNGEM_MMIO_RXDMA_SIZE 0x2000 87 88 #define RXDMA_CFG 0x0000UL /* RX Configuration Register */ 89 #define RXDMA_CFG_ENABLE 0x00000001 /* Enable RX DMA channel */ 90 #define RXDMA_CFG_RINGSZ 0x0000001e /* RX descriptor ring size */ 91 #define RXDMA_CFG_FBOFF 0x00001c00 /* Offset of first data byte */ 92 #define RXDMA_CFG_CSUMOFF 0x000fe000 /* Skip bytes before csum calc */ 93 94 #define RXDMA_DBLOW 0x0004UL /* RX Descriptor Base Low */ 95 #define RXDMA_DBHI 0x0008UL /* RX Descriptor Base High */ 96 #define RXDMA_PCNT 0x0018UL /* RX FIFO Packet Counter */ 97 #define RXDMA_SMACHINE 0x001CUL /* RX State Machine Register */ 98 #define RXDMA_PTHRESH 0x0020UL /* Pause Thresholds */ 99 #define RXDMA_DPLOW 0x0024UL /* RX Data Pointer Low */ 100 #define RXDMA_DPHI 0x0028UL /* RX Data Pointer High */ 101 #define RXDMA_KICK 0x0100UL /* RX Kick Register */ 102 #define RXDMA_DONE 0x0104UL /* RX Completion Register */ 103 #define RXDMA_BLANK 0x0108UL /* RX Blanking Register */ 104 #define RXDMA_FTAG 0x0110UL /* RX FIFO Tag */ 105 #define RXDMA_FSZ 0x0120UL /* RX FIFO Size */ 106 107 /* MAC Registers */ 108 #define SUNGEM_MMIO_MAC_SIZE 0x200 109 110 #define MAC_TXRST 0x0000UL /* TX MAC Software Reset Command */ 111 #define MAC_RXRST 0x0004UL /* RX MAC Software Reset Command */ 112 #define MAC_TXSTAT 0x0010UL /* TX MAC Status Register */ 113 #define MAC_RXSTAT 0x0014UL /* RX MAC Status Register */ 114 115 #define MAC_CSTAT 0x0018UL /* MAC Control Status Register */ 116 #define MAC_CSTAT_PTR 0xffff0000 /* Pause Time Received */ 117 118 #define MAC_TXMASK 0x0020UL /* TX MAC Mask Register */ 119 #define MAC_RXMASK 0x0024UL /* RX MAC Mask Register */ 120 #define MAC_MCMASK 0x0028UL /* MAC Control Mask Register */ 121 122 #define MAC_TXCFG 0x0030UL /* TX MAC Configuration Register */ 123 #define MAC_TXCFG_ENAB 0x00000001 /* TX MAC Enable */ 124 125 #define MAC_RXCFG 0x0034UL /* RX MAC Configuration Register */ 126 #define MAC_RXCFG_ENAB 0x00000001 /* RX MAC Enable */ 127 #define MAC_RXCFG_SFCS 0x00000004 /* Strip FCS */ 128 #define MAC_RXCFG_PROM 0x00000008 /* Promiscuous Mode */ 129 #define MAC_RXCFG_PGRP 0x00000010 /* Promiscuous Group */ 130 #define MAC_RXCFG_HFE 0x00000020 /* Hash Filter Enable */ 131 132 #define MAC_XIFCFG 0x003CUL /* XIF Configuration Register */ 133 #define MAC_XIFCFG_LBCK 0x00000002 /* Loopback TX to RX */ 134 135 #define MAC_MINFSZ 0x0050UL /* MinFrameSize Register */ 136 #define MAC_MAXFSZ 0x0054UL /* MaxFrameSize Register */ 137 #define MAC_ADDR0 0x0080UL /* MAC Address 0 Register */ 138 #define MAC_ADDR1 0x0084UL /* MAC Address 1 Register */ 139 #define MAC_ADDR2 0x0088UL /* MAC Address 2 Register */ 140 #define MAC_ADDR3 0x008CUL /* MAC Address 3 Register */ 141 #define MAC_ADDR4 0x0090UL /* MAC Address 4 Register */ 142 #define MAC_ADDR5 0x0094UL /* MAC Address 5 Register */ 143 #define MAC_HASH0 0x00C0UL /* Hash Table 0 Register */ 144 #define MAC_PATMPS 0x0114UL /* Peak Attempts Register */ 145 #define MAC_SMACHINE 0x0134UL /* State Machine Register */ 146 147 /* MIF Registers */ 148 #define SUNGEM_MMIO_MIF_SIZE 0x20 149 150 #define MIF_FRAME 0x000CUL /* MIF Frame/Output Register */ 151 #define MIF_FRAME_OP 0x30000000 /* OPcode */ 152 #define MIF_FRAME_PHYAD 0x0f800000 /* PHY ADdress */ 153 #define MIF_FRAME_REGAD 0x007c0000 /* REGister ADdress */ 154 #define MIF_FRAME_TALSB 0x00010000 /* Turn Around LSB */ 155 #define MIF_FRAME_DATA 0x0000ffff /* Instruction Payload */ 156 157 #define MIF_CFG 0x0010UL /* MIF Configuration Register */ 158 #define MIF_CFG_MDI0 0x00000100 /* MDIO_0 present or read-bit */ 159 #define MIF_CFG_MDI1 0x00000200 /* MDIO_1 present or read-bit */ 160 161 #define MIF_STATUS 0x0018UL /* MIF Status Register */ 162 #define MIF_SMACHINE 0x001CUL /* MIF State Machine Register */ 163 164 /* PCS/Serialink Registers */ 165 #define SUNGEM_MMIO_PCS_SIZE 0x60 166 #define PCS_MIISTAT 0x0004UL /* PCS MII Status Register */ 167 #define PCS_ISTAT 0x0018UL /* PCS Interrupt Status Reg */ 168 #define PCS_SSTATE 0x005CUL /* Serialink State Register */ 169 170 /* Descriptors */ 171 struct gem_txd { 172 uint64_t control_word; 173 uint64_t buffer; 174 }; 175 176 #define TXDCTRL_BUFSZ 0x0000000000007fffULL /* Buffer Size */ 177 #define TXDCTRL_CSTART 0x00000000001f8000ULL /* CSUM Start Offset */ 178 #define TXDCTRL_COFF 0x000000001fe00000ULL /* CSUM Stuff Offset */ 179 #define TXDCTRL_CENAB 0x0000000020000000ULL /* CSUM Enable */ 180 #define TXDCTRL_EOF 0x0000000040000000ULL /* End of Frame */ 181 #define TXDCTRL_SOF 0x0000000080000000ULL /* Start of Frame */ 182 #define TXDCTRL_INTME 0x0000000100000000ULL /* "Interrupt Me" */ 183 184 struct gem_rxd { 185 uint64_t status_word; 186 uint64_t buffer; 187 }; 188 189 #define RXDCTRL_HPASS 0x1000000000000000ULL /* Passed Hash Filter */ 190 #define RXDCTRL_ALTMAC 0x2000000000000000ULL /* Matched ALT MAC */ 191 192 193 typedef struct { 194 PCIDevice pdev; 195 196 MemoryRegion sungem; 197 MemoryRegion greg; 198 MemoryRegion txdma; 199 MemoryRegion rxdma; 200 MemoryRegion mac; 201 MemoryRegion mif; 202 MemoryRegion pcs; 203 NICState *nic; 204 NICConf conf; 205 uint32_t phy_addr; 206 207 uint32_t gregs[SUNGEM_MMIO_GREG_SIZE >> 2]; 208 uint32_t txdmaregs[SUNGEM_MMIO_TXDMA_SIZE >> 2]; 209 uint32_t rxdmaregs[SUNGEM_MMIO_RXDMA_SIZE >> 2]; 210 uint32_t macregs[SUNGEM_MMIO_MAC_SIZE >> 2]; 211 uint32_t mifregs[SUNGEM_MMIO_MIF_SIZE >> 2]; 212 uint32_t pcsregs[SUNGEM_MMIO_PCS_SIZE >> 2]; 213 214 /* Cache some useful things */ 215 uint32_t rx_mask; 216 uint32_t tx_mask; 217 218 /* Current tx packet */ 219 uint8_t tx_data[MAX_PACKET_SIZE]; 220 uint32_t tx_size; 221 uint64_t tx_first_ctl; 222 } SunGEMState; 223 224 225 static void sungem_eval_irq(SunGEMState *s) 226 { 227 uint32_t stat, mask; 228 229 mask = s->gregs[GREG_IMASK >> 2]; 230 stat = s->gregs[GREG_STAT >> 2] & ~GREG_STAT_TXNR; 231 if (stat & ~mask) { 232 pci_set_irq(PCI_DEVICE(s), 1); 233 } else { 234 pci_set_irq(PCI_DEVICE(s), 0); 235 } 236 } 237 238 static void sungem_update_status(SunGEMState *s, uint32_t bits, bool val) 239 { 240 uint32_t stat; 241 242 stat = s->gregs[GREG_STAT >> 2]; 243 if (val) { 244 stat |= bits; 245 } else { 246 stat &= ~bits; 247 } 248 s->gregs[GREG_STAT >> 2] = stat; 249 sungem_eval_irq(s); 250 } 251 252 static void sungem_eval_cascade_irq(SunGEMState *s) 253 { 254 uint32_t stat, mask; 255 256 mask = s->macregs[MAC_TXSTAT >> 2]; 257 stat = s->macregs[MAC_TXMASK >> 2]; 258 if (stat & ~mask) { 259 sungem_update_status(s, GREG_STAT_TXMAC, true); 260 } else { 261 sungem_update_status(s, GREG_STAT_TXMAC, false); 262 } 263 264 mask = s->macregs[MAC_RXSTAT >> 2]; 265 stat = s->macregs[MAC_RXMASK >> 2]; 266 if (stat & ~mask) { 267 sungem_update_status(s, GREG_STAT_RXMAC, true); 268 } else { 269 sungem_update_status(s, GREG_STAT_RXMAC, false); 270 } 271 272 mask = s->macregs[MAC_CSTAT >> 2]; 273 stat = s->macregs[MAC_MCMASK >> 2] & ~MAC_CSTAT_PTR; 274 if (stat & ~mask) { 275 sungem_update_status(s, GREG_STAT_MAC, true); 276 } else { 277 sungem_update_status(s, GREG_STAT_MAC, false); 278 } 279 } 280 281 static void sungem_do_tx_csum(SunGEMState *s) 282 { 283 uint16_t start, off; 284 uint32_t csum; 285 286 start = (s->tx_first_ctl & TXDCTRL_CSTART) >> 15; 287 off = (s->tx_first_ctl & TXDCTRL_COFF) >> 21; 288 289 trace_sungem_tx_checksum(start, off); 290 291 if (start > (s->tx_size - 2) || off > (s->tx_size - 2)) { 292 trace_sungem_tx_checksum_oob(); 293 return; 294 } 295 296 csum = net_raw_checksum(s->tx_data + start, s->tx_size - start); 297 stw_be_p(s->tx_data + off, csum); 298 } 299 300 static void sungem_send_packet(SunGEMState *s, const uint8_t *buf, 301 int size) 302 { 303 NetClientState *nc = qemu_get_queue(s->nic); 304 305 if (s->macregs[MAC_XIFCFG >> 2] & MAC_XIFCFG_LBCK) { 306 nc->info->receive(nc, buf, size); 307 } else { 308 qemu_send_packet(nc, buf, size); 309 } 310 } 311 312 static void sungem_process_tx_desc(SunGEMState *s, struct gem_txd *desc) 313 { 314 PCIDevice *d = PCI_DEVICE(s); 315 uint32_t len; 316 317 /* If it's a start of frame, discard anything we had in the 318 * buffer and start again. This should be an error condition 319 * if we had something ... for now we ignore it 320 */ 321 if (desc->control_word & TXDCTRL_SOF) { 322 if (s->tx_first_ctl) { 323 trace_sungem_tx_unfinished(); 324 } 325 s->tx_size = 0; 326 s->tx_first_ctl = desc->control_word; 327 } 328 329 /* Grab data size */ 330 len = desc->control_word & TXDCTRL_BUFSZ; 331 332 /* Clamp it to our max size */ 333 if ((s->tx_size + len) > MAX_PACKET_SIZE) { 334 trace_sungem_tx_overflow(); 335 len = MAX_PACKET_SIZE - s->tx_size; 336 } 337 338 /* Read the data */ 339 pci_dma_read(d, desc->buffer, &s->tx_data[s->tx_size], len); 340 s->tx_size += len; 341 342 /* If end of frame, send packet */ 343 if (desc->control_word & TXDCTRL_EOF) { 344 trace_sungem_tx_finished(s->tx_size); 345 346 /* Handle csum */ 347 if (s->tx_first_ctl & TXDCTRL_CENAB) { 348 sungem_do_tx_csum(s); 349 } 350 351 /* Send it */ 352 sungem_send_packet(s, s->tx_data, s->tx_size); 353 354 /* No more pending packet */ 355 s->tx_size = 0; 356 s->tx_first_ctl = 0; 357 } 358 } 359 360 static void sungem_tx_kick(SunGEMState *s) 361 { 362 PCIDevice *d = PCI_DEVICE(s); 363 uint32_t comp, kick; 364 uint32_t txdma_cfg, txmac_cfg, ints; 365 uint64_t dbase; 366 367 trace_sungem_tx_kick(); 368 369 /* Check that both TX MAC and TX DMA are enabled. We don't 370 * handle DMA-less direct FIFO operations (we don't emulate 371 * the FIFO at all). 372 * 373 * A write to TXDMA_KICK while DMA isn't enabled can happen 374 * when the driver is resetting the pointer. 375 */ 376 txdma_cfg = s->txdmaregs[TXDMA_CFG >> 2]; 377 txmac_cfg = s->macregs[MAC_TXCFG >> 2]; 378 if (!(txdma_cfg & TXDMA_CFG_ENABLE) || 379 !(txmac_cfg & MAC_TXCFG_ENAB)) { 380 trace_sungem_tx_disabled(); 381 return; 382 } 383 384 /* XXX Test min frame size register ? */ 385 /* XXX Test max frame size register ? */ 386 387 dbase = s->txdmaregs[TXDMA_DBHI >> 2]; 388 dbase = (dbase << 32) | s->txdmaregs[TXDMA_DBLOW >> 2]; 389 390 comp = s->txdmaregs[TXDMA_TXDONE >> 2] & s->tx_mask; 391 kick = s->txdmaregs[TXDMA_KICK >> 2] & s->tx_mask; 392 393 trace_sungem_tx_process(comp, kick, s->tx_mask + 1); 394 395 /* This is rather primitive for now, we just send everything we 396 * can in one go, like e1000. Ideally we should do the sending 397 * from some kind of background task 398 */ 399 while (comp != kick) { 400 struct gem_txd desc; 401 402 /* Read the next descriptor */ 403 pci_dma_read(d, dbase + comp * sizeof(desc), &desc, sizeof(desc)); 404 405 /* Byteswap descriptor */ 406 desc.control_word = le64_to_cpu(desc.control_word); 407 desc.buffer = le64_to_cpu(desc.buffer); 408 trace_sungem_tx_desc(comp, desc.control_word, desc.buffer); 409 410 /* Send it for processing */ 411 sungem_process_tx_desc(s, &desc); 412 413 /* Interrupt */ 414 ints = GREG_STAT_TXDONE; 415 if (desc.control_word & TXDCTRL_INTME) { 416 ints |= GREG_STAT_TXINTME; 417 } 418 sungem_update_status(s, ints, true); 419 420 /* Next ! */ 421 comp = (comp + 1) & s->tx_mask; 422 s->txdmaregs[TXDMA_TXDONE >> 2] = comp; 423 } 424 425 /* We sent everything, set status/irq bit */ 426 sungem_update_status(s, GREG_STAT_TXALL, true); 427 } 428 429 static bool sungem_rx_full(SunGEMState *s, uint32_t kick, uint32_t done) 430 { 431 return kick == ((done + 1) & s->rx_mask); 432 } 433 434 static int sungem_can_receive(NetClientState *nc) 435 { 436 SunGEMState *s = qemu_get_nic_opaque(nc); 437 uint32_t kick, done, rxdma_cfg, rxmac_cfg; 438 bool full; 439 440 rxmac_cfg = s->macregs[MAC_RXCFG >> 2]; 441 rxdma_cfg = s->rxdmaregs[RXDMA_CFG >> 2]; 442 443 /* If MAC disabled, can't receive */ 444 if ((rxmac_cfg & MAC_RXCFG_ENAB) == 0) { 445 trace_sungem_rx_mac_disabled(); 446 return 0; 447 } 448 if ((rxdma_cfg & RXDMA_CFG_ENABLE) == 0) { 449 trace_sungem_rx_txdma_disabled(); 450 return 0; 451 } 452 453 /* Check RX availability */ 454 kick = s->rxdmaregs[RXDMA_KICK >> 2]; 455 done = s->rxdmaregs[RXDMA_DONE >> 2]; 456 full = sungem_rx_full(s, kick, done); 457 458 trace_sungem_rx_check(!full, kick, done); 459 460 return !full; 461 } 462 463 enum { 464 rx_no_match, 465 rx_match_promisc, 466 rx_match_bcast, 467 rx_match_allmcast, 468 rx_match_mcast, 469 rx_match_mac, 470 rx_match_altmac, 471 }; 472 473 static int sungem_check_rx_mac(SunGEMState *s, const uint8_t *mac, uint32_t crc) 474 { 475 uint32_t rxcfg = s->macregs[MAC_RXCFG >> 2]; 476 uint32_t mac0, mac1, mac2; 477 478 /* Promisc enabled ? */ 479 if (rxcfg & MAC_RXCFG_PROM) { 480 return rx_match_promisc; 481 } 482 483 /* Format MAC address into dwords */ 484 mac0 = (mac[4] << 8) | mac[5]; 485 mac1 = (mac[2] << 8) | mac[3]; 486 mac2 = (mac[0] << 8) | mac[1]; 487 488 trace_sungem_rx_mac_check(mac0, mac1, mac2); 489 490 /* Is this a broadcast frame ? */ 491 if (mac0 == 0xffff && mac1 == 0xffff && mac2 == 0xffff) { 492 return rx_match_bcast; 493 } 494 495 /* TODO: Implement address filter registers (or we don't care ?) */ 496 497 /* Is this a multicast frame ? */ 498 if (mac[0] & 1) { 499 trace_sungem_rx_mac_multicast(); 500 501 /* Promisc group enabled ? */ 502 if (rxcfg & MAC_RXCFG_PGRP) { 503 return rx_match_allmcast; 504 } 505 506 /* TODO: Check MAC control frames (or we don't care) ? */ 507 508 /* Check hash filter (somebody check that's correct ?) */ 509 if (rxcfg & MAC_RXCFG_HFE) { 510 uint32_t hash, idx; 511 512 crc >>= 24; 513 idx = (crc >> 2) & 0x3c; 514 hash = s->macregs[(MAC_HASH0 + idx) >> 2]; 515 if (hash & (1 << (15 - (crc & 0xf)))) { 516 return rx_match_mcast; 517 } 518 } 519 return rx_no_match; 520 } 521 522 /* Main MAC check */ 523 trace_sungem_rx_mac_compare(s->macregs[MAC_ADDR0 >> 2], 524 s->macregs[MAC_ADDR1 >> 2], 525 s->macregs[MAC_ADDR2 >> 2]); 526 527 if (mac0 == s->macregs[MAC_ADDR0 >> 2] && 528 mac1 == s->macregs[MAC_ADDR1 >> 2] && 529 mac2 == s->macregs[MAC_ADDR2 >> 2]) { 530 return rx_match_mac; 531 } 532 533 /* Alt MAC check */ 534 if (mac0 == s->macregs[MAC_ADDR3 >> 2] && 535 mac1 == s->macregs[MAC_ADDR4 >> 2] && 536 mac2 == s->macregs[MAC_ADDR5 >> 2]) { 537 return rx_match_altmac; 538 } 539 540 return rx_no_match; 541 } 542 543 static ssize_t sungem_receive(NetClientState *nc, const uint8_t *buf, 544 size_t size) 545 { 546 SunGEMState *s = qemu_get_nic_opaque(nc); 547 PCIDevice *d = PCI_DEVICE(s); 548 uint32_t mac_crc, done, kick, max_fsize; 549 uint32_t fcs_size, ints, rxdma_cfg, rxmac_cfg, csum, coff; 550 uint8_t smallbuf[60]; 551 struct gem_rxd desc; 552 uint64_t dbase, baddr; 553 unsigned int rx_cond; 554 555 trace_sungem_rx_packet(size); 556 557 rxmac_cfg = s->macregs[MAC_RXCFG >> 2]; 558 rxdma_cfg = s->rxdmaregs[RXDMA_CFG >> 2]; 559 max_fsize = s->macregs[MAC_MAXFSZ >> 2] & 0x7fff; 560 561 /* If MAC or DMA disabled, can't receive */ 562 if (!(rxdma_cfg & RXDMA_CFG_ENABLE) || 563 !(rxmac_cfg & MAC_RXCFG_ENAB)) { 564 trace_sungem_rx_disabled(); 565 return 0; 566 } 567 568 /* Size adjustment for FCS */ 569 if (rxmac_cfg & MAC_RXCFG_SFCS) { 570 fcs_size = 0; 571 } else { 572 fcs_size = 4; 573 } 574 575 /* Discard frame smaller than a MAC or larger than max frame size 576 * (when accounting for FCS) 577 */ 578 if (size < 6 || (size + 4) > max_fsize) { 579 trace_sungem_rx_bad_frame_size(size); 580 /* XXX Increment error statistics ? */ 581 return size; 582 } 583 584 /* We don't drop too small frames since we get them in qemu, we pad 585 * them instead. We should probably use the min frame size register 586 * but I don't want to use a variable size staging buffer and I 587 * know both MacOS and Linux use the default 64 anyway. We use 60 588 * here to account for the non-existent FCS. 589 */ 590 if (size < 60) { 591 memcpy(smallbuf, buf, size); 592 memset(&smallbuf[size], 0, 60 - size); 593 buf = smallbuf; 594 size = 60; 595 } 596 597 /* Get MAC crc */ 598 mac_crc = net_crc32_le(buf, ETH_ALEN); 599 600 /* Packet isn't for me ? */ 601 rx_cond = sungem_check_rx_mac(s, buf, mac_crc); 602 if (rx_cond == rx_no_match) { 603 /* Just drop it */ 604 trace_sungem_rx_unmatched(); 605 return size; 606 } 607 608 /* Get ring pointers */ 609 kick = s->rxdmaregs[RXDMA_KICK >> 2] & s->rx_mask; 610 done = s->rxdmaregs[RXDMA_DONE >> 2] & s->rx_mask; 611 612 trace_sungem_rx_process(done, kick, s->rx_mask + 1); 613 614 /* Ring full ? Can't receive */ 615 if (sungem_rx_full(s, kick, done)) { 616 trace_sungem_rx_ringfull(); 617 return 0; 618 } 619 620 /* Note: The real GEM will fetch descriptors in blocks of 4, 621 * for now we handle them one at a time, I think the driver will 622 * cope 623 */ 624 625 dbase = s->rxdmaregs[RXDMA_DBHI >> 2]; 626 dbase = (dbase << 32) | s->rxdmaregs[RXDMA_DBLOW >> 2]; 627 628 /* Read the next descriptor */ 629 pci_dma_read(d, dbase + done * sizeof(desc), &desc, sizeof(desc)); 630 631 trace_sungem_rx_desc(le64_to_cpu(desc.status_word), 632 le64_to_cpu(desc.buffer)); 633 634 /* Effective buffer address */ 635 baddr = le64_to_cpu(desc.buffer) & ~7ull; 636 baddr |= (rxdma_cfg & RXDMA_CFG_FBOFF) >> 10; 637 638 /* Write buffer out */ 639 pci_dma_write(d, baddr, buf, size); 640 641 if (fcs_size) { 642 /* Should we add an FCS ? Linux doesn't ask us to strip it, 643 * however I believe nothing checks it... For now we just 644 * do nothing. It's faster this way. 645 */ 646 } 647 648 /* Calculate the checksum */ 649 coff = (rxdma_cfg & RXDMA_CFG_CSUMOFF) >> 13; 650 csum = net_raw_checksum((uint8_t *)buf + coff, size - coff); 651 652 /* Build the updated descriptor */ 653 desc.status_word = (size + fcs_size) << 16; 654 desc.status_word |= ((uint64_t)(mac_crc >> 16)) << 44; 655 desc.status_word |= csum; 656 if (rx_cond == rx_match_mcast) { 657 desc.status_word |= RXDCTRL_HPASS; 658 } 659 if (rx_cond == rx_match_altmac) { 660 desc.status_word |= RXDCTRL_ALTMAC; 661 } 662 desc.status_word = cpu_to_le64(desc.status_word); 663 664 pci_dma_write(d, dbase + done * sizeof(desc), &desc, sizeof(desc)); 665 666 done = (done + 1) & s->rx_mask; 667 s->rxdmaregs[RXDMA_DONE >> 2] = done; 668 669 /* XXX Unconditionally set RX interrupt for now. The interrupt 670 * mitigation timer might well end up adding more overhead than 671 * helping here... 672 */ 673 ints = GREG_STAT_RXDONE; 674 if (sungem_rx_full(s, kick, done)) { 675 ints |= GREG_STAT_RXNOBUF; 676 } 677 sungem_update_status(s, ints, true); 678 679 return size; 680 } 681 682 static void sungem_set_link_status(NetClientState *nc) 683 { 684 /* We don't do anything for now as I believe none of the OSes 685 * drivers use the MIF autopoll feature nor the PHY interrupt 686 */ 687 } 688 689 static void sungem_update_masks(SunGEMState *s) 690 { 691 uint32_t sz; 692 693 sz = 1 << (((s->rxdmaregs[RXDMA_CFG >> 2] & RXDMA_CFG_RINGSZ) >> 1) + 5); 694 s->rx_mask = sz - 1; 695 696 sz = 1 << (((s->txdmaregs[TXDMA_CFG >> 2] & TXDMA_CFG_RINGSZ) >> 1) + 5); 697 s->tx_mask = sz - 1; 698 } 699 700 static void sungem_reset_rx(SunGEMState *s) 701 { 702 trace_sungem_rx_reset(); 703 704 /* XXX Do RXCFG */ 705 /* XXX Check value */ 706 s->rxdmaregs[RXDMA_FSZ >> 2] = 0x140; 707 s->rxdmaregs[RXDMA_DONE >> 2] = 0; 708 s->rxdmaregs[RXDMA_KICK >> 2] = 0; 709 s->rxdmaregs[RXDMA_CFG >> 2] = 0x1000010; 710 s->rxdmaregs[RXDMA_PTHRESH >> 2] = 0xf8; 711 s->rxdmaregs[RXDMA_BLANK >> 2] = 0; 712 713 sungem_update_masks(s); 714 } 715 716 static void sungem_reset_tx(SunGEMState *s) 717 { 718 trace_sungem_tx_reset(); 719 720 /* XXX Do TXCFG */ 721 /* XXX Check value */ 722 s->txdmaregs[TXDMA_FSZ >> 2] = 0x90; 723 s->txdmaregs[TXDMA_TXDONE >> 2] = 0; 724 s->txdmaregs[TXDMA_KICK >> 2] = 0; 725 s->txdmaregs[TXDMA_CFG >> 2] = 0x118010; 726 727 sungem_update_masks(s); 728 729 s->tx_size = 0; 730 s->tx_first_ctl = 0; 731 } 732 733 static void sungem_reset_all(SunGEMState *s, bool pci_reset) 734 { 735 trace_sungem_reset(pci_reset); 736 737 sungem_reset_rx(s); 738 sungem_reset_tx(s); 739 740 s->gregs[GREG_IMASK >> 2] = 0xFFFFFFF; 741 s->gregs[GREG_STAT >> 2] = 0; 742 if (pci_reset) { 743 uint8_t *ma = s->conf.macaddr.a; 744 745 s->gregs[GREG_SWRST >> 2] = 0; 746 s->macregs[MAC_ADDR0 >> 2] = (ma[4] << 8) | ma[5]; 747 s->macregs[MAC_ADDR1 >> 2] = (ma[2] << 8) | ma[3]; 748 s->macregs[MAC_ADDR2 >> 2] = (ma[0] << 8) | ma[1]; 749 } else { 750 s->gregs[GREG_SWRST >> 2] &= GREG_SWRST_RSTOUT; 751 } 752 s->mifregs[MIF_CFG >> 2] = MIF_CFG_MDI0; 753 } 754 755 static void sungem_mii_write(SunGEMState *s, uint8_t phy_addr, 756 uint8_t reg_addr, uint16_t val) 757 { 758 trace_sungem_mii_write(phy_addr, reg_addr, val); 759 760 /* XXX TODO */ 761 } 762 763 static uint16_t __sungem_mii_read(SunGEMState *s, uint8_t phy_addr, 764 uint8_t reg_addr) 765 { 766 if (phy_addr != s->phy_addr) { 767 return 0xffff; 768 } 769 /* Primitive emulation of a BCM5201 to please the driver, 770 * ID is 0x00406210. TODO: Do a gigabit PHY like BCM5400 771 */ 772 switch (reg_addr) { 773 case MII_BMCR: 774 return 0; 775 case MII_PHYID1: 776 return 0x0040; 777 case MII_PHYID2: 778 return 0x6210; 779 case MII_BMSR: 780 if (qemu_get_queue(s->nic)->link_down) { 781 return MII_BMSR_100TX_FD | MII_BMSR_AUTONEG; 782 } else { 783 return MII_BMSR_100TX_FD | MII_BMSR_AN_COMP | 784 MII_BMSR_AUTONEG | MII_BMSR_LINK_ST; 785 } 786 case MII_ANLPAR: 787 case MII_ANAR: 788 return MII_ANLPAR_TXFD; 789 case 0x18: /* 5201 AUX status */ 790 return 3; /* 100FD */ 791 default: 792 return 0; 793 }; 794 } 795 static uint16_t sungem_mii_read(SunGEMState *s, uint8_t phy_addr, 796 uint8_t reg_addr) 797 { 798 uint16_t val; 799 800 val = __sungem_mii_read(s, phy_addr, reg_addr); 801 802 trace_sungem_mii_read(phy_addr, reg_addr, val); 803 804 return val; 805 } 806 807 static uint32_t sungem_mii_op(SunGEMState *s, uint32_t val) 808 { 809 uint8_t phy_addr, reg_addr, op; 810 811 /* Ignore not start of frame */ 812 if ((val >> 30) != 1) { 813 trace_sungem_mii_invalid_sof(val >> 30); 814 return 0xffff; 815 } 816 phy_addr = (val & MIF_FRAME_PHYAD) >> 23; 817 reg_addr = (val & MIF_FRAME_REGAD) >> 18; 818 op = (val & MIF_FRAME_OP) >> 28; 819 switch (op) { 820 case 1: 821 sungem_mii_write(s, phy_addr, reg_addr, val & MIF_FRAME_DATA); 822 return val | MIF_FRAME_TALSB; 823 case 2: 824 return sungem_mii_read(s, phy_addr, reg_addr) | MIF_FRAME_TALSB; 825 default: 826 trace_sungem_mii_invalid_op(op); 827 } 828 return 0xffff | MIF_FRAME_TALSB; 829 } 830 831 static void sungem_mmio_greg_write(void *opaque, hwaddr addr, uint64_t val, 832 unsigned size) 833 { 834 SunGEMState *s = opaque; 835 836 if (!(addr < 0x20) && !(addr >= 0x1000 && addr <= 0x1010)) { 837 qemu_log_mask(LOG_GUEST_ERROR, 838 "Write to unknown GREG register 0x%"HWADDR_PRIx"\n", 839 addr); 840 return; 841 } 842 843 trace_sungem_mmio_greg_write(addr, val); 844 845 /* Pre-write filter */ 846 switch (addr) { 847 /* Read only registers */ 848 case GREG_SEBSTATE: 849 case GREG_STAT: 850 case GREG_STAT2: 851 case GREG_PCIESTAT: 852 return; /* No actual write */ 853 case GREG_IACK: 854 val &= GREG_STAT_LATCH; 855 s->gregs[GREG_STAT >> 2] &= ~val; 856 sungem_eval_irq(s); 857 return; /* No actual write */ 858 case GREG_PCIEMASK: 859 val &= 0x7; 860 break; 861 } 862 863 s->gregs[addr >> 2] = val; 864 865 /* Post write action */ 866 switch (addr) { 867 case GREG_IMASK: 868 /* Re-evaluate interrupt */ 869 sungem_eval_irq(s); 870 break; 871 case GREG_SWRST: 872 switch (val & (GREG_SWRST_TXRST | GREG_SWRST_RXRST)) { 873 case GREG_SWRST_RXRST: 874 sungem_reset_rx(s); 875 break; 876 case GREG_SWRST_TXRST: 877 sungem_reset_tx(s); 878 break; 879 case GREG_SWRST_RXRST | GREG_SWRST_TXRST: 880 sungem_reset_all(s, false); 881 } 882 break; 883 } 884 } 885 886 static uint64_t sungem_mmio_greg_read(void *opaque, hwaddr addr, unsigned size) 887 { 888 SunGEMState *s = opaque; 889 uint32_t val; 890 891 if (!(addr < 0x20) && !(addr >= 0x1000 && addr <= 0x1010)) { 892 qemu_log_mask(LOG_GUEST_ERROR, 893 "Read from unknown GREG register 0x%"HWADDR_PRIx"\n", 894 addr); 895 return 0; 896 } 897 898 val = s->gregs[addr >> 2]; 899 900 trace_sungem_mmio_greg_read(addr, val); 901 902 switch (addr) { 903 case GREG_STAT: 904 /* Side effect, clear bottom 7 bits */ 905 s->gregs[GREG_STAT >> 2] &= ~GREG_STAT_LATCH; 906 sungem_eval_irq(s); 907 908 /* Inject TX completion in returned value */ 909 val = (val & ~GREG_STAT_TXNR) | 910 (s->txdmaregs[TXDMA_TXDONE >> 2] << GREG_STAT_TXNR_SHIFT); 911 break; 912 case GREG_STAT2: 913 /* Return the status reg without side effect 914 * (and inject TX completion in returned value) 915 */ 916 val = (s->gregs[GREG_STAT >> 2] & ~GREG_STAT_TXNR) | 917 (s->txdmaregs[TXDMA_TXDONE >> 2] << GREG_STAT_TXNR_SHIFT); 918 break; 919 } 920 921 return val; 922 } 923 924 static const MemoryRegionOps sungem_mmio_greg_ops = { 925 .read = sungem_mmio_greg_read, 926 .write = sungem_mmio_greg_write, 927 .endianness = DEVICE_LITTLE_ENDIAN, 928 .impl = { 929 .min_access_size = 4, 930 .max_access_size = 4, 931 }, 932 }; 933 934 static void sungem_mmio_txdma_write(void *opaque, hwaddr addr, uint64_t val, 935 unsigned size) 936 { 937 SunGEMState *s = opaque; 938 939 if (!(addr < 0x38) && !(addr >= 0x100 && addr <= 0x118)) { 940 qemu_log_mask(LOG_GUEST_ERROR, 941 "Write to unknown TXDMA register 0x%"HWADDR_PRIx"\n", 942 addr); 943 return; 944 } 945 946 trace_sungem_mmio_txdma_write(addr, val); 947 948 /* Pre-write filter */ 949 switch (addr) { 950 /* Read only registers */ 951 case TXDMA_TXDONE: 952 case TXDMA_PCNT: 953 case TXDMA_SMACHINE: 954 case TXDMA_DPLOW: 955 case TXDMA_DPHI: 956 case TXDMA_FSZ: 957 case TXDMA_FTAG: 958 return; /* No actual write */ 959 } 960 961 s->txdmaregs[addr >> 2] = val; 962 963 /* Post write action */ 964 switch (addr) { 965 case TXDMA_KICK: 966 sungem_tx_kick(s); 967 break; 968 case TXDMA_CFG: 969 sungem_update_masks(s); 970 break; 971 } 972 } 973 974 static uint64_t sungem_mmio_txdma_read(void *opaque, hwaddr addr, unsigned size) 975 { 976 SunGEMState *s = opaque; 977 uint32_t val; 978 979 if (!(addr < 0x38) && !(addr >= 0x100 && addr <= 0x118)) { 980 qemu_log_mask(LOG_GUEST_ERROR, 981 "Read from unknown TXDMA register 0x%"HWADDR_PRIx"\n", 982 addr); 983 return 0; 984 } 985 986 val = s->txdmaregs[addr >> 2]; 987 988 trace_sungem_mmio_txdma_read(addr, val); 989 990 return val; 991 } 992 993 static const MemoryRegionOps sungem_mmio_txdma_ops = { 994 .read = sungem_mmio_txdma_read, 995 .write = sungem_mmio_txdma_write, 996 .endianness = DEVICE_LITTLE_ENDIAN, 997 .impl = { 998 .min_access_size = 4, 999 .max_access_size = 4, 1000 }, 1001 }; 1002 1003 static void sungem_mmio_rxdma_write(void *opaque, hwaddr addr, uint64_t val, 1004 unsigned size) 1005 { 1006 SunGEMState *s = opaque; 1007 1008 if (!(addr <= 0x28) && !(addr >= 0x100 && addr <= 0x120)) { 1009 qemu_log_mask(LOG_GUEST_ERROR, 1010 "Write to unknown RXDMA register 0x%"HWADDR_PRIx"\n", 1011 addr); 1012 return; 1013 } 1014 1015 trace_sungem_mmio_rxdma_write(addr, val); 1016 1017 /* Pre-write filter */ 1018 switch (addr) { 1019 /* Read only registers */ 1020 case RXDMA_DONE: 1021 case RXDMA_PCNT: 1022 case RXDMA_SMACHINE: 1023 case RXDMA_DPLOW: 1024 case RXDMA_DPHI: 1025 case RXDMA_FSZ: 1026 case RXDMA_FTAG: 1027 return; /* No actual write */ 1028 } 1029 1030 s->rxdmaregs[addr >> 2] = val; 1031 1032 /* Post write action */ 1033 switch (addr) { 1034 case RXDMA_KICK: 1035 trace_sungem_rx_kick(val); 1036 break; 1037 case RXDMA_CFG: 1038 sungem_update_masks(s); 1039 if ((s->macregs[MAC_RXCFG >> 2] & MAC_RXCFG_ENAB) != 0 && 1040 (s->rxdmaregs[RXDMA_CFG >> 2] & RXDMA_CFG_ENABLE) != 0) { 1041 qemu_flush_queued_packets(qemu_get_queue(s->nic)); 1042 } 1043 break; 1044 } 1045 } 1046 1047 static uint64_t sungem_mmio_rxdma_read(void *opaque, hwaddr addr, unsigned size) 1048 { 1049 SunGEMState *s = opaque; 1050 uint32_t val; 1051 1052 if (!(addr <= 0x28) && !(addr >= 0x100 && addr <= 0x120)) { 1053 qemu_log_mask(LOG_GUEST_ERROR, 1054 "Read from unknown RXDMA register 0x%"HWADDR_PRIx"\n", 1055 addr); 1056 return 0; 1057 } 1058 1059 val = s->rxdmaregs[addr >> 2]; 1060 1061 trace_sungem_mmio_rxdma_read(addr, val); 1062 1063 return val; 1064 } 1065 1066 static const MemoryRegionOps sungem_mmio_rxdma_ops = { 1067 .read = sungem_mmio_rxdma_read, 1068 .write = sungem_mmio_rxdma_write, 1069 .endianness = DEVICE_LITTLE_ENDIAN, 1070 .impl = { 1071 .min_access_size = 4, 1072 .max_access_size = 4, 1073 }, 1074 }; 1075 1076 static void sungem_mmio_mac_write(void *opaque, hwaddr addr, uint64_t val, 1077 unsigned size) 1078 { 1079 SunGEMState *s = opaque; 1080 1081 if (!(addr <= 0x134)) { 1082 qemu_log_mask(LOG_GUEST_ERROR, 1083 "Write to unknown MAC register 0x%"HWADDR_PRIx"\n", 1084 addr); 1085 return; 1086 } 1087 1088 trace_sungem_mmio_mac_write(addr, val); 1089 1090 /* Pre-write filter */ 1091 switch (addr) { 1092 /* Read only registers */ 1093 case MAC_TXRST: /* Not technically read-only but will do for now */ 1094 case MAC_RXRST: /* Not technically read-only but will do for now */ 1095 case MAC_TXSTAT: 1096 case MAC_RXSTAT: 1097 case MAC_CSTAT: 1098 case MAC_PATMPS: 1099 case MAC_SMACHINE: 1100 return; /* No actual write */ 1101 case MAC_MINFSZ: 1102 /* 10-bits implemented */ 1103 val &= 0x3ff; 1104 break; 1105 } 1106 1107 s->macregs[addr >> 2] = val; 1108 1109 /* Post write action */ 1110 switch (addr) { 1111 case MAC_TXMASK: 1112 case MAC_RXMASK: 1113 case MAC_MCMASK: 1114 sungem_eval_cascade_irq(s); 1115 break; 1116 case MAC_RXCFG: 1117 sungem_update_masks(s); 1118 if ((s->macregs[MAC_RXCFG >> 2] & MAC_RXCFG_ENAB) != 0 && 1119 (s->rxdmaregs[RXDMA_CFG >> 2] & RXDMA_CFG_ENABLE) != 0) { 1120 qemu_flush_queued_packets(qemu_get_queue(s->nic)); 1121 } 1122 break; 1123 } 1124 } 1125 1126 static uint64_t sungem_mmio_mac_read(void *opaque, hwaddr addr, unsigned size) 1127 { 1128 SunGEMState *s = opaque; 1129 uint32_t val; 1130 1131 if (!(addr <= 0x134)) { 1132 qemu_log_mask(LOG_GUEST_ERROR, 1133 "Read from unknown MAC register 0x%"HWADDR_PRIx"\n", 1134 addr); 1135 return 0; 1136 } 1137 1138 val = s->macregs[addr >> 2]; 1139 1140 trace_sungem_mmio_mac_read(addr, val); 1141 1142 switch (addr) { 1143 case MAC_TXSTAT: 1144 /* Side effect, clear all */ 1145 s->macregs[addr >> 2] = 0; 1146 sungem_update_status(s, GREG_STAT_TXMAC, false); 1147 break; 1148 case MAC_RXSTAT: 1149 /* Side effect, clear all */ 1150 s->macregs[addr >> 2] = 0; 1151 sungem_update_status(s, GREG_STAT_RXMAC, false); 1152 break; 1153 case MAC_CSTAT: 1154 /* Side effect, interrupt bits */ 1155 s->macregs[addr >> 2] &= MAC_CSTAT_PTR; 1156 sungem_update_status(s, GREG_STAT_MAC, false); 1157 break; 1158 } 1159 1160 return val; 1161 } 1162 1163 static const MemoryRegionOps sungem_mmio_mac_ops = { 1164 .read = sungem_mmio_mac_read, 1165 .write = sungem_mmio_mac_write, 1166 .endianness = DEVICE_LITTLE_ENDIAN, 1167 .impl = { 1168 .min_access_size = 4, 1169 .max_access_size = 4, 1170 }, 1171 }; 1172 1173 static void sungem_mmio_mif_write(void *opaque, hwaddr addr, uint64_t val, 1174 unsigned size) 1175 { 1176 SunGEMState *s = opaque; 1177 1178 if (!(addr <= 0x1c)) { 1179 qemu_log_mask(LOG_GUEST_ERROR, 1180 "Write to unknown MIF register 0x%"HWADDR_PRIx"\n", 1181 addr); 1182 return; 1183 } 1184 1185 trace_sungem_mmio_mif_write(addr, val); 1186 1187 /* Pre-write filter */ 1188 switch (addr) { 1189 /* Read only registers */ 1190 case MIF_STATUS: 1191 case MIF_SMACHINE: 1192 return; /* No actual write */ 1193 case MIF_CFG: 1194 /* Maintain the RO MDI bits to advertize an MDIO PHY on MDI0 */ 1195 val &= ~MIF_CFG_MDI1; 1196 val |= MIF_CFG_MDI0; 1197 break; 1198 } 1199 1200 s->mifregs[addr >> 2] = val; 1201 1202 /* Post write action */ 1203 switch (addr) { 1204 case MIF_FRAME: 1205 s->mifregs[addr >> 2] = sungem_mii_op(s, val); 1206 break; 1207 } 1208 } 1209 1210 static uint64_t sungem_mmio_mif_read(void *opaque, hwaddr addr, unsigned size) 1211 { 1212 SunGEMState *s = opaque; 1213 uint32_t val; 1214 1215 if (!(addr <= 0x1c)) { 1216 qemu_log_mask(LOG_GUEST_ERROR, 1217 "Read from unknown MIF register 0x%"HWADDR_PRIx"\n", 1218 addr); 1219 return 0; 1220 } 1221 1222 val = s->mifregs[addr >> 2]; 1223 1224 trace_sungem_mmio_mif_read(addr, val); 1225 1226 return val; 1227 } 1228 1229 static const MemoryRegionOps sungem_mmio_mif_ops = { 1230 .read = sungem_mmio_mif_read, 1231 .write = sungem_mmio_mif_write, 1232 .endianness = DEVICE_LITTLE_ENDIAN, 1233 .impl = { 1234 .min_access_size = 4, 1235 .max_access_size = 4, 1236 }, 1237 }; 1238 1239 static void sungem_mmio_pcs_write(void *opaque, hwaddr addr, uint64_t val, 1240 unsigned size) 1241 { 1242 SunGEMState *s = opaque; 1243 1244 if (!(addr <= 0x18) && !(addr >= 0x50 && addr <= 0x5c)) { 1245 qemu_log_mask(LOG_GUEST_ERROR, 1246 "Write to unknown PCS register 0x%"HWADDR_PRIx"\n", 1247 addr); 1248 return; 1249 } 1250 1251 trace_sungem_mmio_pcs_write(addr, val); 1252 1253 /* Pre-write filter */ 1254 switch (addr) { 1255 /* Read only registers */ 1256 case PCS_MIISTAT: 1257 case PCS_ISTAT: 1258 case PCS_SSTATE: 1259 return; /* No actual write */ 1260 } 1261 1262 s->pcsregs[addr >> 2] = val; 1263 } 1264 1265 static uint64_t sungem_mmio_pcs_read(void *opaque, hwaddr addr, unsigned size) 1266 { 1267 SunGEMState *s = opaque; 1268 uint32_t val; 1269 1270 if (!(addr <= 0x18) && !(addr >= 0x50 && addr <= 0x5c)) { 1271 qemu_log_mask(LOG_GUEST_ERROR, 1272 "Read from unknown PCS register 0x%"HWADDR_PRIx"\n", 1273 addr); 1274 return 0; 1275 } 1276 1277 val = s->pcsregs[addr >> 2]; 1278 1279 trace_sungem_mmio_pcs_read(addr, val); 1280 1281 return val; 1282 } 1283 1284 static const MemoryRegionOps sungem_mmio_pcs_ops = { 1285 .read = sungem_mmio_pcs_read, 1286 .write = sungem_mmio_pcs_write, 1287 .endianness = DEVICE_LITTLE_ENDIAN, 1288 .impl = { 1289 .min_access_size = 4, 1290 .max_access_size = 4, 1291 }, 1292 }; 1293 1294 static void sungem_uninit(PCIDevice *dev) 1295 { 1296 SunGEMState *s = SUNGEM(dev); 1297 1298 qemu_del_nic(s->nic); 1299 } 1300 1301 static NetClientInfo net_sungem_info = { 1302 .type = NET_CLIENT_DRIVER_NIC, 1303 .size = sizeof(NICState), 1304 .can_receive = sungem_can_receive, 1305 .receive = sungem_receive, 1306 .link_status_changed = sungem_set_link_status, 1307 }; 1308 1309 static void sungem_realize(PCIDevice *pci_dev, Error **errp) 1310 { 1311 DeviceState *dev = DEVICE(pci_dev); 1312 SunGEMState *s = SUNGEM(pci_dev); 1313 uint8_t *pci_conf; 1314 1315 pci_conf = pci_dev->config; 1316 1317 pci_set_word(pci_conf + PCI_STATUS, 1318 PCI_STATUS_FAST_BACK | 1319 PCI_STATUS_DEVSEL_MEDIUM | 1320 PCI_STATUS_66MHZ); 1321 1322 pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, 0x0); 1323 pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, 0x0); 1324 1325 pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */ 1326 pci_conf[PCI_MIN_GNT] = 0x40; 1327 pci_conf[PCI_MAX_LAT] = 0x40; 1328 1329 sungem_reset_all(s, true); 1330 memory_region_init(&s->sungem, OBJECT(s), "sungem", SUNGEM_MMIO_SIZE); 1331 1332 memory_region_init_io(&s->greg, OBJECT(s), &sungem_mmio_greg_ops, s, 1333 "sungem.greg", SUNGEM_MMIO_GREG_SIZE); 1334 memory_region_add_subregion(&s->sungem, 0, &s->greg); 1335 1336 memory_region_init_io(&s->txdma, OBJECT(s), &sungem_mmio_txdma_ops, s, 1337 "sungem.txdma", SUNGEM_MMIO_TXDMA_SIZE); 1338 memory_region_add_subregion(&s->sungem, 0x2000, &s->txdma); 1339 1340 memory_region_init_io(&s->rxdma, OBJECT(s), &sungem_mmio_rxdma_ops, s, 1341 "sungem.rxdma", SUNGEM_MMIO_RXDMA_SIZE); 1342 memory_region_add_subregion(&s->sungem, 0x4000, &s->rxdma); 1343 1344 memory_region_init_io(&s->mac, OBJECT(s), &sungem_mmio_mac_ops, s, 1345 "sungem.mac", SUNGEM_MMIO_MAC_SIZE); 1346 memory_region_add_subregion(&s->sungem, 0x6000, &s->mac); 1347 1348 memory_region_init_io(&s->mif, OBJECT(s), &sungem_mmio_mif_ops, s, 1349 "sungem.mif", SUNGEM_MMIO_MIF_SIZE); 1350 memory_region_add_subregion(&s->sungem, 0x6200, &s->mif); 1351 1352 memory_region_init_io(&s->pcs, OBJECT(s), &sungem_mmio_pcs_ops, s, 1353 "sungem.pcs", SUNGEM_MMIO_PCS_SIZE); 1354 memory_region_add_subregion(&s->sungem, 0x9000, &s->pcs); 1355 1356 pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->sungem); 1357 1358 qemu_macaddr_default_if_unset(&s->conf.macaddr); 1359 s->nic = qemu_new_nic(&net_sungem_info, &s->conf, 1360 object_get_typename(OBJECT(dev)), 1361 dev->id, s); 1362 qemu_format_nic_info_str(qemu_get_queue(s->nic), 1363 s->conf.macaddr.a); 1364 } 1365 1366 static void sungem_reset(DeviceState *dev) 1367 { 1368 SunGEMState *s = SUNGEM(dev); 1369 1370 sungem_reset_all(s, true); 1371 } 1372 1373 static void sungem_instance_init(Object *obj) 1374 { 1375 SunGEMState *s = SUNGEM(obj); 1376 1377 device_add_bootindex_property(obj, &s->conf.bootindex, 1378 "bootindex", "/ethernet-phy@0", 1379 DEVICE(obj), NULL); 1380 } 1381 1382 static Property sungem_properties[] = { 1383 DEFINE_NIC_PROPERTIES(SunGEMState, conf), 1384 /* Phy address should be 0 for most Apple machines except 1385 * for K2 in which case it's 1. Will be set by a machine 1386 * override. 1387 */ 1388 DEFINE_PROP_UINT32("phy_addr", SunGEMState, phy_addr, 0), 1389 DEFINE_PROP_END_OF_LIST(), 1390 }; 1391 1392 static const VMStateDescription vmstate_sungem = { 1393 .name = "sungem", 1394 .version_id = 0, 1395 .minimum_version_id = 0, 1396 .fields = (VMStateField[]) { 1397 VMSTATE_PCI_DEVICE(pdev, SunGEMState), 1398 VMSTATE_MACADDR(conf.macaddr, SunGEMState), 1399 VMSTATE_UINT32(phy_addr, SunGEMState), 1400 VMSTATE_UINT32_ARRAY(gregs, SunGEMState, (SUNGEM_MMIO_GREG_SIZE >> 2)), 1401 VMSTATE_UINT32_ARRAY(txdmaregs, SunGEMState, 1402 (SUNGEM_MMIO_TXDMA_SIZE >> 2)), 1403 VMSTATE_UINT32_ARRAY(rxdmaregs, SunGEMState, 1404 (SUNGEM_MMIO_RXDMA_SIZE >> 2)), 1405 VMSTATE_UINT32_ARRAY(macregs, SunGEMState, (SUNGEM_MMIO_MAC_SIZE >> 2)), 1406 VMSTATE_UINT32_ARRAY(mifregs, SunGEMState, (SUNGEM_MMIO_MIF_SIZE >> 2)), 1407 VMSTATE_UINT32_ARRAY(pcsregs, SunGEMState, (SUNGEM_MMIO_PCS_SIZE >> 2)), 1408 VMSTATE_UINT32(rx_mask, SunGEMState), 1409 VMSTATE_UINT32(tx_mask, SunGEMState), 1410 VMSTATE_UINT8_ARRAY(tx_data, SunGEMState, MAX_PACKET_SIZE), 1411 VMSTATE_UINT32(tx_size, SunGEMState), 1412 VMSTATE_UINT64(tx_first_ctl, SunGEMState), 1413 VMSTATE_END_OF_LIST() 1414 } 1415 }; 1416 1417 static void sungem_class_init(ObjectClass *klass, void *data) 1418 { 1419 DeviceClass *dc = DEVICE_CLASS(klass); 1420 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 1421 1422 k->realize = sungem_realize; 1423 k->exit = sungem_uninit; 1424 k->vendor_id = PCI_VENDOR_ID_APPLE; 1425 k->device_id = PCI_DEVICE_ID_APPLE_UNI_N_GMAC; 1426 k->revision = 0x01; 1427 k->class_id = PCI_CLASS_NETWORK_ETHERNET; 1428 dc->vmsd = &vmstate_sungem; 1429 dc->reset = sungem_reset; 1430 dc->props = sungem_properties; 1431 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 1432 } 1433 1434 static const TypeInfo sungem_info = { 1435 .name = TYPE_SUNGEM, 1436 .parent = TYPE_PCI_DEVICE, 1437 .instance_size = sizeof(SunGEMState), 1438 .class_init = sungem_class_init, 1439 .instance_init = sungem_instance_init, 1440 .interfaces = (InterfaceInfo[]) { 1441 { INTERFACE_CONVENTIONAL_PCI_DEVICE }, 1442 { } 1443 } 1444 }; 1445 1446 static void sungem_register_types(void) 1447 { 1448 type_register_static(&sungem_info); 1449 } 1450 1451 type_init(sungem_register_types) 1452