/* * QEMU model of SUN GEM ethernet controller * * As found in Apple ASICs among others * * Copyright 2016 Ben Herrenschmidt * Copyright 2017 Mark Cave-Ayland */ #include "qemu/osdep.h" #include "hw/pci/pci_device.h" #include "hw/qdev-properties.h" #include "migration/vmstate.h" #include "qemu/log.h" #include "qemu/module.h" #include "net/net.h" #include "net/eth.h" #include "net/checksum.h" #include "hw/net/mii.h" #include "sysemu/sysemu.h" #include "trace.h" #include "qom/object.h" #define TYPE_SUNGEM "sungem" OBJECT_DECLARE_SIMPLE_TYPE(SunGEMState, SUNGEM) #define MAX_PACKET_SIZE 9016 #define SUNGEM_MMIO_SIZE 0x200000 /* Global registers */ #define SUNGEM_MMIO_GREG_SIZE 0x2000 #define GREG_SEBSTATE 0x0000UL /* SEB State Register */ #define GREG_STAT 0x000CUL /* Status Register */ #define GREG_STAT_TXINTME 0x00000001 /* TX INTME frame transferred */ #define GREG_STAT_TXALL 0x00000002 /* All TX frames transferred */ #define GREG_STAT_TXDONE 0x00000004 /* One TX frame transferred */ #define GREG_STAT_RXDONE 0x00000010 /* One RX frame arrived */ #define GREG_STAT_RXNOBUF 0x00000020 /* No free RX buffers available */ #define GREG_STAT_RXTAGERR 0x00000040 /* RX tag framing is corrupt */ #define GREG_STAT_TXMAC 0x00004000 /* TX MAC signalled interrupt */ #define GREG_STAT_RXMAC 0x00008000 /* RX MAC signalled interrupt */ #define GREG_STAT_MAC 0x00010000 /* MAC Control signalled irq */ #define GREG_STAT_TXNR 0xfff80000 /* == TXDMA_TXDONE reg val */ #define GREG_STAT_TXNR_SHIFT 19 /* These interrupts are edge latches in the status register, * reading it (or writing the corresponding bit in IACK) will * clear them */ #define GREG_STAT_LATCH (GREG_STAT_TXALL | GREG_STAT_TXINTME | \ GREG_STAT_RXDONE | GREG_STAT_RXDONE | \ GREG_STAT_RXNOBUF | GREG_STAT_RXTAGERR) #define GREG_IMASK 0x0010UL /* Interrupt Mask Register */ #define GREG_IACK 0x0014UL /* Interrupt ACK Register */ #define GREG_STAT2 0x001CUL /* Alias of GREG_STAT */ #define GREG_PCIESTAT 0x1000UL /* PCI Error Status Register */ #define GREG_PCIEMASK 0x1004UL /* PCI Error Mask Register */ #define GREG_SWRST 0x1010UL /* Software Reset Register */ #define GREG_SWRST_TXRST 0x00000001 /* TX Software Reset */ #define GREG_SWRST_RXRST 0x00000002 /* RX Software Reset */ #define GREG_SWRST_RSTOUT 0x00000004 /* Force RST# pin active */ /* TX DMA Registers */ #define SUNGEM_MMIO_TXDMA_SIZE 0x1000 #define TXDMA_KICK 0x0000UL /* TX Kick Register */ #define TXDMA_CFG 0x0004UL /* TX Configuration Register */ #define TXDMA_CFG_ENABLE 0x00000001 /* Enable TX DMA channel */ #define TXDMA_CFG_RINGSZ 0x0000001e /* TX descriptor ring size */ #define TXDMA_DBLOW 0x0008UL /* TX Desc. Base Low */ #define TXDMA_DBHI 0x000CUL /* TX Desc. Base High */ #define TXDMA_PCNT 0x0024UL /* TX FIFO Packet Counter */ #define TXDMA_SMACHINE 0x0028UL /* TX State Machine Register */ #define TXDMA_DPLOW 0x0030UL /* TX Data Pointer Low */ #define TXDMA_DPHI 0x0034UL /* TX Data Pointer High */ #define TXDMA_TXDONE 0x0100UL /* TX Completion Register */ #define TXDMA_FTAG 0x0108UL /* TX FIFO Tag */ #define TXDMA_FSZ 0x0118UL /* TX FIFO Size */ /* Receive DMA Registers */ #define SUNGEM_MMIO_RXDMA_SIZE 0x2000 #define RXDMA_CFG 0x0000UL /* RX Configuration Register */ #define RXDMA_CFG_ENABLE 0x00000001 /* Enable RX DMA channel */ #define RXDMA_CFG_RINGSZ 0x0000001e /* RX descriptor ring size */ #define RXDMA_CFG_FBOFF 0x00001c00 /* Offset of first data byte */ #define RXDMA_CFG_CSUMOFF 0x000fe000 /* Skip bytes before csum calc */ #define RXDMA_DBLOW 0x0004UL /* RX Descriptor Base Low */ #define RXDMA_DBHI 0x0008UL /* RX Descriptor Base High */ #define RXDMA_PCNT 0x0018UL /* RX FIFO Packet Counter */ #define RXDMA_SMACHINE 0x001CUL /* RX State Machine Register */ #define RXDMA_PTHRESH 0x0020UL /* Pause Thresholds */ #define RXDMA_DPLOW 0x0024UL /* RX Data Pointer Low */ #define RXDMA_DPHI 0x0028UL /* RX Data Pointer High */ #define RXDMA_KICK 0x0100UL /* RX Kick Register */ #define RXDMA_DONE 0x0104UL /* RX Completion Register */ #define RXDMA_BLANK 0x0108UL /* RX Blanking Register */ #define RXDMA_FTAG 0x0110UL /* RX FIFO Tag */ #define RXDMA_FSZ 0x0120UL /* RX FIFO Size */ /* MAC Registers */ #define SUNGEM_MMIO_MAC_SIZE 0x200 #define MAC_TXRST 0x0000UL /* TX MAC Software Reset Command */ #define MAC_RXRST 0x0004UL /* RX MAC Software Reset Command */ #define MAC_TXSTAT 0x0010UL /* TX MAC Status Register */ #define MAC_RXSTAT 0x0014UL /* RX MAC Status Register */ #define MAC_CSTAT 0x0018UL /* MAC Control Status Register */ #define MAC_CSTAT_PTR 0xffff0000 /* Pause Time Received */ #define MAC_TXMASK 0x0020UL /* TX MAC Mask Register */ #define MAC_RXMASK 0x0024UL /* RX MAC Mask Register */ #define MAC_MCMASK 0x0028UL /* MAC Control Mask Register */ #define MAC_TXCFG 0x0030UL /* TX MAC Configuration Register */ #define MAC_TXCFG_ENAB 0x00000001 /* TX MAC Enable */ #define MAC_RXCFG 0x0034UL /* RX MAC Configuration Register */ #define MAC_RXCFG_ENAB 0x00000001 /* RX MAC Enable */ #define MAC_RXCFG_SFCS 0x00000004 /* Strip FCS */ #define MAC_RXCFG_PROM 0x00000008 /* Promiscuous Mode */ #define MAC_RXCFG_PGRP 0x00000010 /* Promiscuous Group */ #define MAC_RXCFG_HFE 0x00000020 /* Hash Filter Enable */ #define MAC_XIFCFG 0x003CUL /* XIF Configuration Register */ #define MAC_XIFCFG_LBCK 0x00000002 /* Loopback TX to RX */ #define MAC_MINFSZ 0x0050UL /* MinFrameSize Register */ #define MAC_MAXFSZ 0x0054UL /* MaxFrameSize Register */ #define MAC_ADDR0 0x0080UL /* MAC Address 0 Register */ #define MAC_ADDR1 0x0084UL /* MAC Address 1 Register */ #define MAC_ADDR2 0x0088UL /* MAC Address 2 Register */ #define MAC_ADDR3 0x008CUL /* MAC Address 3 Register */ #define MAC_ADDR4 0x0090UL /* MAC Address 4 Register */ #define MAC_ADDR5 0x0094UL /* MAC Address 5 Register */ #define MAC_HASH0 0x00C0UL /* Hash Table 0 Register */ #define MAC_PATMPS 0x0114UL /* Peak Attempts Register */ #define MAC_SMACHINE 0x0134UL /* State Machine Register */ /* MIF Registers */ #define SUNGEM_MMIO_MIF_SIZE 0x20 #define MIF_FRAME 0x000CUL /* MIF Frame/Output Register */ #define MIF_FRAME_OP 0x30000000 /* OPcode */ #define MIF_FRAME_PHYAD 0x0f800000 /* PHY ADdress */ #define MIF_FRAME_REGAD 0x007c0000 /* REGister ADdress */ #define MIF_FRAME_TALSB 0x00010000 /* Turn Around LSB */ #define MIF_FRAME_DATA 0x0000ffff /* Instruction Payload */ #define MIF_CFG 0x0010UL /* MIF Configuration Register */ #define MIF_CFG_MDI0 0x00000100 /* MDIO_0 present or read-bit */ #define MIF_CFG_MDI1 0x00000200 /* MDIO_1 present or read-bit */ #define MIF_STATUS 0x0018UL /* MIF Status Register */ #define MIF_SMACHINE 0x001CUL /* MIF State Machine Register */ /* PCS/Serialink Registers */ #define SUNGEM_MMIO_PCS_SIZE 0x60 #define PCS_MIISTAT 0x0004UL /* PCS MII Status Register */ #define PCS_ISTAT 0x0018UL /* PCS Interrupt Status Reg */ #define PCS_SSTATE 0x005CUL /* Serialink State Register */ /* Descriptors */ struct gem_txd { uint64_t control_word; uint64_t buffer; }; #define TXDCTRL_BUFSZ 0x0000000000007fffULL /* Buffer Size */ #define TXDCTRL_CSTART 0x00000000001f8000ULL /* CSUM Start Offset */ #define TXDCTRL_COFF 0x000000001fe00000ULL /* CSUM Stuff Offset */ #define TXDCTRL_CENAB 0x0000000020000000ULL /* CSUM Enable */ #define TXDCTRL_EOF 0x0000000040000000ULL /* End of Frame */ #define TXDCTRL_SOF 0x0000000080000000ULL /* Start of Frame */ #define TXDCTRL_INTME 0x0000000100000000ULL /* "Interrupt Me" */ struct gem_rxd { uint64_t status_word; uint64_t buffer; }; #define RXDCTRL_HPASS 0x1000000000000000ULL /* Passed Hash Filter */ #define RXDCTRL_ALTMAC 0x2000000000000000ULL /* Matched ALT MAC */ struct SunGEMState { PCIDevice pdev; MemoryRegion sungem; MemoryRegion greg; MemoryRegion txdma; MemoryRegion rxdma; MemoryRegion mac; MemoryRegion mif; MemoryRegion pcs; NICState *nic; NICConf conf; uint32_t phy_addr; uint32_t gregs[SUNGEM_MMIO_GREG_SIZE >> 2]; uint32_t txdmaregs[SUNGEM_MMIO_TXDMA_SIZE >> 2]; uint32_t rxdmaregs[SUNGEM_MMIO_RXDMA_SIZE >> 2]; uint32_t macregs[SUNGEM_MMIO_MAC_SIZE >> 2]; uint32_t mifregs[SUNGEM_MMIO_MIF_SIZE >> 2]; uint32_t pcsregs[SUNGEM_MMIO_PCS_SIZE >> 2]; /* Cache some useful things */ uint32_t rx_mask; uint32_t tx_mask; /* Current tx packet */ uint8_t tx_data[MAX_PACKET_SIZE]; uint32_t tx_size; uint64_t tx_first_ctl; }; static void sungem_eval_irq(SunGEMState *s) { uint32_t stat, mask; mask = s->gregs[GREG_IMASK >> 2]; stat = s->gregs[GREG_STAT >> 2] & ~GREG_STAT_TXNR; if (stat & ~mask) { pci_set_irq(PCI_DEVICE(s), 1); } else { pci_set_irq(PCI_DEVICE(s), 0); } } static void sungem_update_status(SunGEMState *s, uint32_t bits, bool val) { uint32_t stat; stat = s->gregs[GREG_STAT >> 2]; if (val) { stat |= bits; } else { stat &= ~bits; } s->gregs[GREG_STAT >> 2] = stat; sungem_eval_irq(s); } static void sungem_eval_cascade_irq(SunGEMState *s) { uint32_t stat, mask; mask = s->macregs[MAC_TXSTAT >> 2]; stat = s->macregs[MAC_TXMASK >> 2]; if (stat & ~mask) { sungem_update_status(s, GREG_STAT_TXMAC, true); } else { sungem_update_status(s, GREG_STAT_TXMAC, false); } mask = s->macregs[MAC_RXSTAT >> 2]; stat = s->macregs[MAC_RXMASK >> 2]; if (stat & ~mask) { sungem_update_status(s, GREG_STAT_RXMAC, true); } else { sungem_update_status(s, GREG_STAT_RXMAC, false); } mask = s->macregs[MAC_CSTAT >> 2]; stat = s->macregs[MAC_MCMASK >> 2] & ~MAC_CSTAT_PTR; if (stat & ~mask) { sungem_update_status(s, GREG_STAT_MAC, true); } else { sungem_update_status(s, GREG_STAT_MAC, false); } } static void sungem_do_tx_csum(SunGEMState *s) { uint16_t start, off; uint32_t csum; start = (s->tx_first_ctl & TXDCTRL_CSTART) >> 15; off = (s->tx_first_ctl & TXDCTRL_COFF) >> 21; trace_sungem_tx_checksum(start, off); if (start > (s->tx_size - 2) || off > (s->tx_size - 2)) { trace_sungem_tx_checksum_oob(); return; } csum = net_raw_checksum(s->tx_data + start, s->tx_size - start); stw_be_p(s->tx_data + off, csum); } static void sungem_send_packet(SunGEMState *s, const uint8_t *buf, int size) { NetClientState *nc = qemu_get_queue(s->nic); if (s->macregs[MAC_XIFCFG >> 2] & MAC_XIFCFG_LBCK) { qemu_receive_packet(nc, buf, size); } else { qemu_send_packet(nc, buf, size); } } static void sungem_process_tx_desc(SunGEMState *s, struct gem_txd *desc) { PCIDevice *d = PCI_DEVICE(s); uint32_t len; /* If it's a start of frame, discard anything we had in the * buffer and start again. This should be an error condition * if we had something ... for now we ignore it */ if (desc->control_word & TXDCTRL_SOF) { if (s->tx_first_ctl) { trace_sungem_tx_unfinished(); } s->tx_size = 0; s->tx_first_ctl = desc->control_word; } /* Grab data size */ len = desc->control_word & TXDCTRL_BUFSZ; /* Clamp it to our max size */ if ((s->tx_size + len) > MAX_PACKET_SIZE) { trace_sungem_tx_overflow(); len = MAX_PACKET_SIZE - s->tx_size; } /* Read the data */ pci_dma_read(d, desc->buffer, &s->tx_data[s->tx_size], len); s->tx_size += len; /* If end of frame, send packet */ if (desc->control_word & TXDCTRL_EOF) { trace_sungem_tx_finished(s->tx_size); /* Handle csum */ if (s->tx_first_ctl & TXDCTRL_CENAB) { sungem_do_tx_csum(s); } /* Send it */ sungem_send_packet(s, s->tx_data, s->tx_size); /* No more pending packet */ s->tx_size = 0; s->tx_first_ctl = 0; } } static void sungem_tx_kick(SunGEMState *s) { PCIDevice *d = PCI_DEVICE(s); uint32_t comp, kick; uint32_t txdma_cfg, txmac_cfg, ints; uint64_t dbase; trace_sungem_tx_kick(); /* Check that both TX MAC and TX DMA are enabled. We don't * handle DMA-less direct FIFO operations (we don't emulate * the FIFO at all). * * A write to TXDMA_KICK while DMA isn't enabled can happen * when the driver is resetting the pointer. */ txdma_cfg = s->txdmaregs[TXDMA_CFG >> 2]; txmac_cfg = s->macregs[MAC_TXCFG >> 2]; if (!(txdma_cfg & TXDMA_CFG_ENABLE) || !(txmac_cfg & MAC_TXCFG_ENAB)) { trace_sungem_tx_disabled(); return; } /* XXX Test min frame size register ? */ /* XXX Test max frame size register ? */ dbase = s->txdmaregs[TXDMA_DBHI >> 2]; dbase = (dbase << 32) | s->txdmaregs[TXDMA_DBLOW >> 2]; comp = s->txdmaregs[TXDMA_TXDONE >> 2] & s->tx_mask; kick = s->txdmaregs[TXDMA_KICK >> 2] & s->tx_mask; trace_sungem_tx_process(comp, kick, s->tx_mask + 1); /* This is rather primitive for now, we just send everything we * can in one go, like e1000. Ideally we should do the sending * from some kind of background task */ while (comp != kick) { struct gem_txd desc; /* Read the next descriptor */ pci_dma_read(d, dbase + comp * sizeof(desc), &desc, sizeof(desc)); /* Byteswap descriptor */ desc.control_word = le64_to_cpu(desc.control_word); desc.buffer = le64_to_cpu(desc.buffer); trace_sungem_tx_desc(comp, desc.control_word, desc.buffer); /* Send it for processing */ sungem_process_tx_desc(s, &desc); /* Interrupt */ ints = GREG_STAT_TXDONE; if (desc.control_word & TXDCTRL_INTME) { ints |= GREG_STAT_TXINTME; } sungem_update_status(s, ints, true); /* Next ! */ comp = (comp + 1) & s->tx_mask; s->txdmaregs[TXDMA_TXDONE >> 2] = comp; } /* We sent everything, set status/irq bit */ sungem_update_status(s, GREG_STAT_TXALL, true); } static bool sungem_rx_full(SunGEMState *s, uint32_t kick, uint32_t done) { return kick == ((done + 1) & s->rx_mask); } static bool sungem_can_receive(NetClientState *nc) { SunGEMState *s = qemu_get_nic_opaque(nc); uint32_t kick, done, rxdma_cfg, rxmac_cfg; bool full; rxmac_cfg = s->macregs[MAC_RXCFG >> 2]; rxdma_cfg = s->rxdmaregs[RXDMA_CFG >> 2]; /* If MAC disabled, can't receive */ if ((rxmac_cfg & MAC_RXCFG_ENAB) == 0) { trace_sungem_rx_mac_disabled(); return false; } if ((rxdma_cfg & RXDMA_CFG_ENABLE) == 0) { trace_sungem_rx_txdma_disabled(); return false; } /* Check RX availability */ kick = s->rxdmaregs[RXDMA_KICK >> 2]; done = s->rxdmaregs[RXDMA_DONE >> 2]; full = sungem_rx_full(s, kick, done); trace_sungem_rx_check(!full, kick, done); return !full; } enum { rx_no_match, rx_match_promisc, rx_match_bcast, rx_match_allmcast, rx_match_mcast, rx_match_mac, rx_match_altmac, }; static int sungem_check_rx_mac(SunGEMState *s, const uint8_t *mac, uint32_t crc) { uint32_t rxcfg = s->macregs[MAC_RXCFG >> 2]; uint32_t mac0, mac1, mac2; /* Promisc enabled ? */ if (rxcfg & MAC_RXCFG_PROM) { return rx_match_promisc; } /* Format MAC address into dwords */ mac0 = (mac[4] << 8) | mac[5]; mac1 = (mac[2] << 8) | mac[3]; mac2 = (mac[0] << 8) | mac[1]; trace_sungem_rx_mac_check(mac0, mac1, mac2); /* Is this a broadcast frame ? */ if (mac0 == 0xffff && mac1 == 0xffff && mac2 == 0xffff) { return rx_match_bcast; } /* TODO: Implement address filter registers (or we don't care ?) */ /* Is this a multicast frame ? */ if (mac[0] & 1) { trace_sungem_rx_mac_multicast(); /* Promisc group enabled ? */ if (rxcfg & MAC_RXCFG_PGRP) { return rx_match_allmcast; } /* TODO: Check MAC control frames (or we don't care) ? */ /* Check hash filter (somebody check that's correct ?) */ if (rxcfg & MAC_RXCFG_HFE) { uint32_t hash, idx; crc >>= 24; idx = (crc >> 2) & 0x3c; hash = s->macregs[(MAC_HASH0 + idx) >> 2]; if (hash & (1 << (15 - (crc & 0xf)))) { return rx_match_mcast; } } return rx_no_match; } /* Main MAC check */ trace_sungem_rx_mac_compare(s->macregs[MAC_ADDR0 >> 2], s->macregs[MAC_ADDR1 >> 2], s->macregs[MAC_ADDR2 >> 2]); if (mac0 == s->macregs[MAC_ADDR0 >> 2] && mac1 == s->macregs[MAC_ADDR1 >> 2] && mac2 == s->macregs[MAC_ADDR2 >> 2]) { return rx_match_mac; } /* Alt MAC check */ if (mac0 == s->macregs[MAC_ADDR3 >> 2] && mac1 == s->macregs[MAC_ADDR4 >> 2] && mac2 == s->macregs[MAC_ADDR5 >> 2]) { return rx_match_altmac; } return rx_no_match; } static ssize_t sungem_receive(NetClientState *nc, const uint8_t *buf, size_t size) { SunGEMState *s = qemu_get_nic_opaque(nc); PCIDevice *d = PCI_DEVICE(s); uint32_t mac_crc, done, kick, max_fsize; uint32_t fcs_size, ints, rxdma_cfg, rxmac_cfg, csum, coff; struct gem_rxd desc; uint64_t dbase, baddr; unsigned int rx_cond; trace_sungem_rx_packet(size); rxmac_cfg = s->macregs[MAC_RXCFG >> 2]; rxdma_cfg = s->rxdmaregs[RXDMA_CFG >> 2]; max_fsize = s->macregs[MAC_MAXFSZ >> 2] & 0x7fff; /* If MAC or DMA disabled, can't receive */ if (!(rxdma_cfg & RXDMA_CFG_ENABLE) || !(rxmac_cfg & MAC_RXCFG_ENAB)) { trace_sungem_rx_disabled(); return 0; } /* Size adjustment for FCS */ if (rxmac_cfg & MAC_RXCFG_SFCS) { fcs_size = 0; } else { fcs_size = 4; } /* Discard frame smaller than a MAC or larger than max frame size * (when accounting for FCS) */ if (size < 6 || (size + 4) > max_fsize) { trace_sungem_rx_bad_frame_size(size); /* XXX Increment error statistics ? */ return size; } /* Get MAC crc */ mac_crc = net_crc32_le(buf, ETH_ALEN); /* Packet isn't for me ? */ rx_cond = sungem_check_rx_mac(s, buf, mac_crc); if (rx_cond == rx_no_match) { /* Just drop it */ trace_sungem_rx_unmatched(); return size; } /* Get ring pointers */ kick = s->rxdmaregs[RXDMA_KICK >> 2] & s->rx_mask; done = s->rxdmaregs[RXDMA_DONE >> 2] & s->rx_mask; trace_sungem_rx_process(done, kick, s->rx_mask + 1); /* Ring full ? Can't receive */ if (sungem_rx_full(s, kick, done)) { trace_sungem_rx_ringfull(); return 0; } /* Note: The real GEM will fetch descriptors in blocks of 4, * for now we handle them one at a time, I think the driver will * cope */ dbase = s->rxdmaregs[RXDMA_DBHI >> 2]; dbase = (dbase << 32) | s->rxdmaregs[RXDMA_DBLOW >> 2]; /* Read the next descriptor */ pci_dma_read(d, dbase + done * sizeof(desc), &desc, sizeof(desc)); trace_sungem_rx_desc(le64_to_cpu(desc.status_word), le64_to_cpu(desc.buffer)); /* Effective buffer address */ baddr = le64_to_cpu(desc.buffer) & ~7ull; baddr |= (rxdma_cfg & RXDMA_CFG_FBOFF) >> 10; /* Write buffer out */ pci_dma_write(d, baddr, buf, size); if (fcs_size) { /* Should we add an FCS ? Linux doesn't ask us to strip it, * however I believe nothing checks it... For now we just * do nothing. It's faster this way. */ } /* Calculate the checksum */ coff = (rxdma_cfg & RXDMA_CFG_CSUMOFF) >> 13; csum = net_raw_checksum((uint8_t *)buf + coff, size - coff); /* Build the updated descriptor */ desc.status_word = (size + fcs_size) << 16; desc.status_word |= ((uint64_t)(mac_crc >> 16)) << 44; desc.status_word |= csum; if (rx_cond == rx_match_mcast) { desc.status_word |= RXDCTRL_HPASS; } if (rx_cond == rx_match_altmac) { desc.status_word |= RXDCTRL_ALTMAC; } desc.status_word = cpu_to_le64(desc.status_word); pci_dma_write(d, dbase + done * sizeof(desc), &desc, sizeof(desc)); done = (done + 1) & s->rx_mask; s->rxdmaregs[RXDMA_DONE >> 2] = done; /* XXX Unconditionally set RX interrupt for now. The interrupt * mitigation timer might well end up adding more overhead than * helping here... */ ints = GREG_STAT_RXDONE; if (sungem_rx_full(s, kick, done)) { ints |= GREG_STAT_RXNOBUF; } sungem_update_status(s, ints, true); return size; } static void sungem_set_link_status(NetClientState *nc) { /* We don't do anything for now as I believe none of the OSes * drivers use the MIF autopoll feature nor the PHY interrupt */ } static void sungem_update_masks(SunGEMState *s) { uint32_t sz; sz = 1 << (((s->rxdmaregs[RXDMA_CFG >> 2] & RXDMA_CFG_RINGSZ) >> 1) + 5); s->rx_mask = sz - 1; sz = 1 << (((s->txdmaregs[TXDMA_CFG >> 2] & TXDMA_CFG_RINGSZ) >> 1) + 5); s->tx_mask = sz - 1; } static void sungem_reset_rx(SunGEMState *s) { trace_sungem_rx_reset(); /* XXX Do RXCFG */ /* XXX Check value */ s->rxdmaregs[RXDMA_FSZ >> 2] = 0x140; s->rxdmaregs[RXDMA_DONE >> 2] = 0; s->rxdmaregs[RXDMA_KICK >> 2] = 0; s->rxdmaregs[RXDMA_CFG >> 2] = 0x1000010; s->rxdmaregs[RXDMA_PTHRESH >> 2] = 0xf8; s->rxdmaregs[RXDMA_BLANK >> 2] = 0; sungem_update_masks(s); } static void sungem_reset_tx(SunGEMState *s) { trace_sungem_tx_reset(); /* XXX Do TXCFG */ /* XXX Check value */ s->txdmaregs[TXDMA_FSZ >> 2] = 0x90; s->txdmaregs[TXDMA_TXDONE >> 2] = 0; s->txdmaregs[TXDMA_KICK >> 2] = 0; s->txdmaregs[TXDMA_CFG >> 2] = 0x118010; sungem_update_masks(s); s->tx_size = 0; s->tx_first_ctl = 0; } static void sungem_reset_all(SunGEMState *s, bool pci_reset) { trace_sungem_reset(pci_reset); sungem_reset_rx(s); sungem_reset_tx(s); s->gregs[GREG_IMASK >> 2] = 0xFFFFFFF; s->gregs[GREG_STAT >> 2] = 0; if (pci_reset) { uint8_t *ma = s->conf.macaddr.a; s->gregs[GREG_SWRST >> 2] = 0; s->macregs[MAC_ADDR0 >> 2] = (ma[4] << 8) | ma[5]; s->macregs[MAC_ADDR1 >> 2] = (ma[2] << 8) | ma[3]; s->macregs[MAC_ADDR2 >> 2] = (ma[0] << 8) | ma[1]; } else { s->gregs[GREG_SWRST >> 2] &= GREG_SWRST_RSTOUT; } s->mifregs[MIF_CFG >> 2] = MIF_CFG_MDI0; } static void sungem_mii_write(SunGEMState *s, uint8_t phy_addr, uint8_t reg_addr, uint16_t val) { trace_sungem_mii_write(phy_addr, reg_addr, val); /* XXX TODO */ } static uint16_t __sungem_mii_read(SunGEMState *s, uint8_t phy_addr, uint8_t reg_addr) { if (phy_addr != s->phy_addr) { return 0xffff; } /* Primitive emulation of a BCM5201 to please the driver, * ID is 0x00406210. TODO: Do a gigabit PHY like BCM5400 */ switch (reg_addr) { case MII_BMCR: return 0; case MII_PHYID1: return 0x0040; case MII_PHYID2: return 0x6210; case MII_BMSR: if (qemu_get_queue(s->nic)->link_down) { return MII_BMSR_100TX_FD | MII_BMSR_AUTONEG; } else { return MII_BMSR_100TX_FD | MII_BMSR_AN_COMP | MII_BMSR_AUTONEG | MII_BMSR_LINK_ST; } case MII_ANLPAR: case MII_ANAR: return MII_ANLPAR_TXFD; case 0x18: /* 5201 AUX status */ return 3; /* 100FD */ default: return 0; }; } static uint16_t sungem_mii_read(SunGEMState *s, uint8_t phy_addr, uint8_t reg_addr) { uint16_t val; val = __sungem_mii_read(s, phy_addr, reg_addr); trace_sungem_mii_read(phy_addr, reg_addr, val); return val; } static uint32_t sungem_mii_op(SunGEMState *s, uint32_t val) { uint8_t phy_addr, reg_addr, op; /* Ignore not start of frame */ if ((val >> 30) != 1) { trace_sungem_mii_invalid_sof(val >> 30); return 0xffff; } phy_addr = (val & MIF_FRAME_PHYAD) >> 23; reg_addr = (val & MIF_FRAME_REGAD) >> 18; op = (val & MIF_FRAME_OP) >> 28; switch (op) { case 1: sungem_mii_write(s, phy_addr, reg_addr, val & MIF_FRAME_DATA); return val | MIF_FRAME_TALSB; case 2: return sungem_mii_read(s, phy_addr, reg_addr) | MIF_FRAME_TALSB; default: trace_sungem_mii_invalid_op(op); } return 0xffff | MIF_FRAME_TALSB; } static void sungem_mmio_greg_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { SunGEMState *s = opaque; if (!(addr < 0x20) && !(addr >= 0x1000 && addr <= 0x1010)) { qemu_log_mask(LOG_GUEST_ERROR, "Write to unknown GREG register 0x%"HWADDR_PRIx"\n", addr); return; } trace_sungem_mmio_greg_write(addr, val); /* Pre-write filter */ switch (addr) { /* Read only registers */ case GREG_SEBSTATE: case GREG_STAT: case GREG_STAT2: case GREG_PCIESTAT: return; /* No actual write */ case GREG_IACK: val &= GREG_STAT_LATCH; s->gregs[GREG_STAT >> 2] &= ~val; sungem_eval_irq(s); return; /* No actual write */ case GREG_PCIEMASK: val &= 0x7; break; } s->gregs[addr >> 2] = val; /* Post write action */ switch (addr) { case GREG_IMASK: /* Re-evaluate interrupt */ sungem_eval_irq(s); break; case GREG_SWRST: switch (val & (GREG_SWRST_TXRST | GREG_SWRST_RXRST)) { case GREG_SWRST_RXRST: sungem_reset_rx(s); break; case GREG_SWRST_TXRST: sungem_reset_tx(s); break; case GREG_SWRST_RXRST | GREG_SWRST_TXRST: sungem_reset_all(s, false); } break; } } static uint64_t sungem_mmio_greg_read(void *opaque, hwaddr addr, unsigned size) { SunGEMState *s = opaque; uint32_t val; if (!(addr < 0x20) && !(addr >= 0x1000 && addr <= 0x1010)) { qemu_log_mask(LOG_GUEST_ERROR, "Read from unknown GREG register 0x%"HWADDR_PRIx"\n", addr); return 0; } val = s->gregs[addr >> 2]; trace_sungem_mmio_greg_read(addr, val); switch (addr) { case GREG_STAT: /* Side effect, clear bottom 7 bits */ s->gregs[GREG_STAT >> 2] &= ~GREG_STAT_LATCH; sungem_eval_irq(s); /* Inject TX completion in returned value */ val = (val & ~GREG_STAT_TXNR) | (s->txdmaregs[TXDMA_TXDONE >> 2] << GREG_STAT_TXNR_SHIFT); break; case GREG_STAT2: /* Return the status reg without side effect * (and inject TX completion in returned value) */ val = (s->gregs[GREG_STAT >> 2] & ~GREG_STAT_TXNR) | (s->txdmaregs[TXDMA_TXDONE >> 2] << GREG_STAT_TXNR_SHIFT); break; } return val; } static const MemoryRegionOps sungem_mmio_greg_ops = { .read = sungem_mmio_greg_read, .write = sungem_mmio_greg_write, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static void sungem_mmio_txdma_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { SunGEMState *s = opaque; if (!(addr < 0x38) && !(addr >= 0x100 && addr <= 0x118)) { qemu_log_mask(LOG_GUEST_ERROR, "Write to unknown TXDMA register 0x%"HWADDR_PRIx"\n", addr); return; } trace_sungem_mmio_txdma_write(addr, val); /* Pre-write filter */ switch (addr) { /* Read only registers */ case TXDMA_TXDONE: case TXDMA_PCNT: case TXDMA_SMACHINE: case TXDMA_DPLOW: case TXDMA_DPHI: case TXDMA_FSZ: case TXDMA_FTAG: return; /* No actual write */ } s->txdmaregs[addr >> 2] = val; /* Post write action */ switch (addr) { case TXDMA_KICK: sungem_tx_kick(s); break; case TXDMA_CFG: sungem_update_masks(s); break; } } static uint64_t sungem_mmio_txdma_read(void *opaque, hwaddr addr, unsigned size) { SunGEMState *s = opaque; uint32_t val; if (!(addr < 0x38) && !(addr >= 0x100 && addr <= 0x118)) { qemu_log_mask(LOG_GUEST_ERROR, "Read from unknown TXDMA register 0x%"HWADDR_PRIx"\n", addr); return 0; } val = s->txdmaregs[addr >> 2]; trace_sungem_mmio_txdma_read(addr, val); return val; } static const MemoryRegionOps sungem_mmio_txdma_ops = { .read = sungem_mmio_txdma_read, .write = sungem_mmio_txdma_write, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static void sungem_mmio_rxdma_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { SunGEMState *s = opaque; if (!(addr <= 0x28) && !(addr >= 0x100 && addr <= 0x120)) { qemu_log_mask(LOG_GUEST_ERROR, "Write to unknown RXDMA register 0x%"HWADDR_PRIx"\n", addr); return; } trace_sungem_mmio_rxdma_write(addr, val); /* Pre-write filter */ switch (addr) { /* Read only registers */ case RXDMA_DONE: case RXDMA_PCNT: case RXDMA_SMACHINE: case RXDMA_DPLOW: case RXDMA_DPHI: case RXDMA_FSZ: case RXDMA_FTAG: return; /* No actual write */ } s->rxdmaregs[addr >> 2] = val; /* Post write action */ switch (addr) { case RXDMA_KICK: trace_sungem_rx_kick(val); break; case RXDMA_CFG: sungem_update_masks(s); if ((s->macregs[MAC_RXCFG >> 2] & MAC_RXCFG_ENAB) != 0 && (s->rxdmaregs[RXDMA_CFG >> 2] & RXDMA_CFG_ENABLE) != 0) { qemu_flush_queued_packets(qemu_get_queue(s->nic)); } break; } } static uint64_t sungem_mmio_rxdma_read(void *opaque, hwaddr addr, unsigned size) { SunGEMState *s = opaque; uint32_t val; if (!(addr <= 0x28) && !(addr >= 0x100 && addr <= 0x120)) { qemu_log_mask(LOG_GUEST_ERROR, "Read from unknown RXDMA register 0x%"HWADDR_PRIx"\n", addr); return 0; } val = s->rxdmaregs[addr >> 2]; trace_sungem_mmio_rxdma_read(addr, val); return val; } static const MemoryRegionOps sungem_mmio_rxdma_ops = { .read = sungem_mmio_rxdma_read, .write = sungem_mmio_rxdma_write, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static void sungem_mmio_mac_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { SunGEMState *s = opaque; if (!(addr <= 0x134)) { qemu_log_mask(LOG_GUEST_ERROR, "Write to unknown MAC register 0x%"HWADDR_PRIx"\n", addr); return; } trace_sungem_mmio_mac_write(addr, val); /* Pre-write filter */ switch (addr) { /* Read only registers */ case MAC_TXRST: /* Not technically read-only but will do for now */ case MAC_RXRST: /* Not technically read-only but will do for now */ case MAC_TXSTAT: case MAC_RXSTAT: case MAC_CSTAT: case MAC_PATMPS: case MAC_SMACHINE: return; /* No actual write */ case MAC_MINFSZ: /* 10-bits implemented */ val &= 0x3ff; break; } s->macregs[addr >> 2] = val; /* Post write action */ switch (addr) { case MAC_TXMASK: case MAC_RXMASK: case MAC_MCMASK: sungem_eval_cascade_irq(s); break; case MAC_RXCFG: sungem_update_masks(s); if ((s->macregs[MAC_RXCFG >> 2] & MAC_RXCFG_ENAB) != 0 && (s->rxdmaregs[RXDMA_CFG >> 2] & RXDMA_CFG_ENABLE) != 0) { qemu_flush_queued_packets(qemu_get_queue(s->nic)); } break; } } static uint64_t sungem_mmio_mac_read(void *opaque, hwaddr addr, unsigned size) { SunGEMState *s = opaque; uint32_t val; if (!(addr <= 0x134)) { qemu_log_mask(LOG_GUEST_ERROR, "Read from unknown MAC register 0x%"HWADDR_PRIx"\n", addr); return 0; } val = s->macregs[addr >> 2]; trace_sungem_mmio_mac_read(addr, val); switch (addr) { case MAC_TXSTAT: /* Side effect, clear all */ s->macregs[addr >> 2] = 0; sungem_update_status(s, GREG_STAT_TXMAC, false); break; case MAC_RXSTAT: /* Side effect, clear all */ s->macregs[addr >> 2] = 0; sungem_update_status(s, GREG_STAT_RXMAC, false); break; case MAC_CSTAT: /* Side effect, interrupt bits */ s->macregs[addr >> 2] &= MAC_CSTAT_PTR; sungem_update_status(s, GREG_STAT_MAC, false); break; } return val; } static const MemoryRegionOps sungem_mmio_mac_ops = { .read = sungem_mmio_mac_read, .write = sungem_mmio_mac_write, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static void sungem_mmio_mif_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { SunGEMState *s = opaque; if (!(addr <= 0x1c)) { qemu_log_mask(LOG_GUEST_ERROR, "Write to unknown MIF register 0x%"HWADDR_PRIx"\n", addr); return; } trace_sungem_mmio_mif_write(addr, val); /* Pre-write filter */ switch (addr) { /* Read only registers */ case MIF_STATUS: case MIF_SMACHINE: return; /* No actual write */ case MIF_CFG: /* Maintain the RO MDI bits to advertize an MDIO PHY on MDI0 */ val &= ~MIF_CFG_MDI1; val |= MIF_CFG_MDI0; break; } s->mifregs[addr >> 2] = val; /* Post write action */ switch (addr) { case MIF_FRAME: s->mifregs[addr >> 2] = sungem_mii_op(s, val); break; } } static uint64_t sungem_mmio_mif_read(void *opaque, hwaddr addr, unsigned size) { SunGEMState *s = opaque; uint32_t val; if (!(addr <= 0x1c)) { qemu_log_mask(LOG_GUEST_ERROR, "Read from unknown MIF register 0x%"HWADDR_PRIx"\n", addr); return 0; } val = s->mifregs[addr >> 2]; trace_sungem_mmio_mif_read(addr, val); return val; } static const MemoryRegionOps sungem_mmio_mif_ops = { .read = sungem_mmio_mif_read, .write = sungem_mmio_mif_write, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static void sungem_mmio_pcs_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { SunGEMState *s = opaque; if (!(addr <= 0x18) && !(addr >= 0x50 && addr <= 0x5c)) { qemu_log_mask(LOG_GUEST_ERROR, "Write to unknown PCS register 0x%"HWADDR_PRIx"\n", addr); return; } trace_sungem_mmio_pcs_write(addr, val); /* Pre-write filter */ switch (addr) { /* Read only registers */ case PCS_MIISTAT: case PCS_ISTAT: case PCS_SSTATE: return; /* No actual write */ } s->pcsregs[addr >> 2] = val; } static uint64_t sungem_mmio_pcs_read(void *opaque, hwaddr addr, unsigned size) { SunGEMState *s = opaque; uint32_t val; if (!(addr <= 0x18) && !(addr >= 0x50 && addr <= 0x5c)) { qemu_log_mask(LOG_GUEST_ERROR, "Read from unknown PCS register 0x%"HWADDR_PRIx"\n", addr); return 0; } val = s->pcsregs[addr >> 2]; trace_sungem_mmio_pcs_read(addr, val); return val; } static const MemoryRegionOps sungem_mmio_pcs_ops = { .read = sungem_mmio_pcs_read, .write = sungem_mmio_pcs_write, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static void sungem_uninit(PCIDevice *dev) { SunGEMState *s = SUNGEM(dev); qemu_del_nic(s->nic); } static NetClientInfo net_sungem_info = { .type = NET_CLIENT_DRIVER_NIC, .size = sizeof(NICState), .can_receive = sungem_can_receive, .receive = sungem_receive, .link_status_changed = sungem_set_link_status, }; static void sungem_realize(PCIDevice *pci_dev, Error **errp) { DeviceState *dev = DEVICE(pci_dev); SunGEMState *s = SUNGEM(pci_dev); uint8_t *pci_conf; pci_conf = pci_dev->config; pci_set_word(pci_conf + PCI_STATUS, PCI_STATUS_FAST_BACK | PCI_STATUS_DEVSEL_MEDIUM | PCI_STATUS_66MHZ); pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, 0x0); pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, 0x0); pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */ pci_conf[PCI_MIN_GNT] = 0x40; pci_conf[PCI_MAX_LAT] = 0x40; sungem_reset_all(s, true); memory_region_init(&s->sungem, OBJECT(s), "sungem", SUNGEM_MMIO_SIZE); memory_region_init_io(&s->greg, OBJECT(s), &sungem_mmio_greg_ops, s, "sungem.greg", SUNGEM_MMIO_GREG_SIZE); memory_region_add_subregion(&s->sungem, 0, &s->greg); memory_region_init_io(&s->txdma, OBJECT(s), &sungem_mmio_txdma_ops, s, "sungem.txdma", SUNGEM_MMIO_TXDMA_SIZE); memory_region_add_subregion(&s->sungem, 0x2000, &s->txdma); memory_region_init_io(&s->rxdma, OBJECT(s), &sungem_mmio_rxdma_ops, s, "sungem.rxdma", SUNGEM_MMIO_RXDMA_SIZE); memory_region_add_subregion(&s->sungem, 0x4000, &s->rxdma); memory_region_init_io(&s->mac, OBJECT(s), &sungem_mmio_mac_ops, s, "sungem.mac", SUNGEM_MMIO_MAC_SIZE); memory_region_add_subregion(&s->sungem, 0x6000, &s->mac); memory_region_init_io(&s->mif, OBJECT(s), &sungem_mmio_mif_ops, s, "sungem.mif", SUNGEM_MMIO_MIF_SIZE); memory_region_add_subregion(&s->sungem, 0x6200, &s->mif); memory_region_init_io(&s->pcs, OBJECT(s), &sungem_mmio_pcs_ops, s, "sungem.pcs", SUNGEM_MMIO_PCS_SIZE); memory_region_add_subregion(&s->sungem, 0x9000, &s->pcs); pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->sungem); qemu_macaddr_default_if_unset(&s->conf.macaddr); s->nic = qemu_new_nic(&net_sungem_info, &s->conf, object_get_typename(OBJECT(dev)), dev->id, s); qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a); } static void sungem_reset(DeviceState *dev) { SunGEMState *s = SUNGEM(dev); sungem_reset_all(s, true); } static void sungem_instance_init(Object *obj) { SunGEMState *s = SUNGEM(obj); device_add_bootindex_property(obj, &s->conf.bootindex, "bootindex", "/ethernet-phy@0", DEVICE(obj)); } static Property sungem_properties[] = { DEFINE_NIC_PROPERTIES(SunGEMState, conf), /* Phy address should be 0 for most Apple machines except * for K2 in which case it's 1. Will be set by a machine * override. */ DEFINE_PROP_UINT32("phy_addr", SunGEMState, phy_addr, 0), DEFINE_PROP_END_OF_LIST(), }; static const VMStateDescription vmstate_sungem = { .name = "sungem", .version_id = 0, .minimum_version_id = 0, .fields = (VMStateField[]) { VMSTATE_PCI_DEVICE(pdev, SunGEMState), VMSTATE_MACADDR(conf.macaddr, SunGEMState), VMSTATE_UINT32(phy_addr, SunGEMState), VMSTATE_UINT32_ARRAY(gregs, SunGEMState, (SUNGEM_MMIO_GREG_SIZE >> 2)), VMSTATE_UINT32_ARRAY(txdmaregs, SunGEMState, (SUNGEM_MMIO_TXDMA_SIZE >> 2)), VMSTATE_UINT32_ARRAY(rxdmaregs, SunGEMState, (SUNGEM_MMIO_RXDMA_SIZE >> 2)), VMSTATE_UINT32_ARRAY(macregs, SunGEMState, (SUNGEM_MMIO_MAC_SIZE >> 2)), VMSTATE_UINT32_ARRAY(mifregs, SunGEMState, (SUNGEM_MMIO_MIF_SIZE >> 2)), VMSTATE_UINT32_ARRAY(pcsregs, SunGEMState, (SUNGEM_MMIO_PCS_SIZE >> 2)), VMSTATE_UINT32(rx_mask, SunGEMState), VMSTATE_UINT32(tx_mask, SunGEMState), VMSTATE_UINT8_ARRAY(tx_data, SunGEMState, MAX_PACKET_SIZE), VMSTATE_UINT32(tx_size, SunGEMState), VMSTATE_UINT64(tx_first_ctl, SunGEMState), VMSTATE_END_OF_LIST() } }; static void sungem_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); k->realize = sungem_realize; k->exit = sungem_uninit; k->vendor_id = PCI_VENDOR_ID_APPLE; k->device_id = PCI_DEVICE_ID_APPLE_UNI_N_GMAC; k->revision = 0x01; k->class_id = PCI_CLASS_NETWORK_ETHERNET; dc->vmsd = &vmstate_sungem; dc->reset = sungem_reset; device_class_set_props(dc, sungem_properties); set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); } static const TypeInfo sungem_info = { .name = TYPE_SUNGEM, .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(SunGEMState), .class_init = sungem_class_init, .instance_init = sungem_instance_init, .interfaces = (InterfaceInfo[]) { { INTERFACE_CONVENTIONAL_PCI_DEVICE }, { } } }; static void sungem_register_types(void) { type_register_static(&sungem_info); } type_init(sungem_register_types)