* Re: [Qemu-devel] [PATCHv2 1/1] net: Add SunGEM device emulation as found on Apple UniNorth
2017-09-06 18:19 ` [Qemu-devel] [PATCHv2 1/1] " Mark Cave-Ayland
@ 2017-09-09 3:50 ` David Gibson
0 siblings, 0 replies; 3+ messages in thread
From: David Gibson @ 2017-09-09 3:50 UTC (permalink / raw)
To: Mark Cave-Ayland; +Cc: qemu-devel, qemu-ppc, benh
[-- Attachment #1: Type: text/plain, Size: 56923 bytes --]
On Wed, Sep 06, 2017 at 07:19:55PM +0100, Mark Cave-Ayland wrote:
> From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
>
> This adds a simplistic emulation of the Sun GEM ethernet controller
> found in Apple ASICs.
>
> Currently we only support the Apple UniNorth 1.x variant, but the
> other Apple or Sun variants should mostly be a matter of adding
> PCI IDs options.
>
> We have a very primitive emulation of a single Broadcom 5201 PHY
> which is supported by the MacOS driver.
>
> This model brings out-of-the-box networking to MacOS 9, and all
> versions of OS X I tried with the mac99 platform.
>
> Further improvements from Mark:
> - Remove sungem.h file, moving constants into sungem.c as required
> - Switch to using tracepoints for debugging
> - Split register blocks into separate memory regions
> - Use arrays in SunGEMState to hold register values
> - Add state-saving support
>
> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Applied to ppc-for-2.11.
> ---
> default-configs/ppc-softmmu.mak | 1 +
> hw/net/Makefile.objs | 1 +
> hw/net/sungem.c | 1447 +++++++++++++++++++++++++++++++++++++++
> hw/net/trace-events | 44 ++
> hw/pci/pci.c | 2 +
> include/hw/pci/pci_ids.h | 1 +
> 6 files changed, 1496 insertions(+)
> create mode 100644 hw/net/sungem.c
>
> diff --git a/default-configs/ppc-softmmu.mak b/default-configs/ppc-softmmu.mak
> index 1f1cd85..c12ba9e 100644
> --- a/default-configs/ppc-softmmu.mak
> +++ b/default-configs/ppc-softmmu.mak
> @@ -17,6 +17,7 @@ CONFIG_PREP_PCI=y
> CONFIG_I82378=y
> CONFIG_PC87312=y
> CONFIG_MACIO=y
> +CONFIG_SUNGEM=y
> CONFIG_PCSPK=y
> CONFIG_CS4231A=y
> CONFIG_CUDA=y
> diff --git a/hw/net/Makefile.objs b/hw/net/Makefile.objs
> index 5ddaffe..7e87d01 100644
> --- a/hw/net/Makefile.objs
> +++ b/hw/net/Makefile.objs
> @@ -27,6 +27,7 @@ common-obj-$(CONFIG_CADENCE) += cadence_gem.o
> common-obj-$(CONFIG_STELLARIS_ENET) += stellaris_enet.o
> common-obj-$(CONFIG_LANCE) += lance.o
> common-obj-$(CONFIG_FTGMAC100) += ftgmac100.o
> +common-obj-$(CONFIG_SUNGEM) += sungem.o
>
> obj-$(CONFIG_ETRAXFS) += etraxfs_eth.o
> obj-$(CONFIG_COLDFIRE) += mcf_fec.o
> diff --git a/hw/net/sungem.c b/hw/net/sungem.c
> new file mode 100644
> index 0000000..dffa0c9
> --- /dev/null
> +++ b/hw/net/sungem.c
> @@ -0,0 +1,1447 @@
> +/*
> + * 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.h"
> +#include "qemu/log.h"
> +#include "net/net.h"
> +#include "net/checksum.h"
> +#include "hw/net/mii.h"
> +#include "sysemu/sysemu.h"
> +#include "trace.h"
> +/* For crc32 */
> +#include <zlib.h>
> +
> +#define TYPE_SUNGEM "sungem"
> +
> +#define SUNGEM(obj) OBJECT_CHECK(SunGEMState, (obj), TYPE_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 */
> +
> +
> +typedef struct {
> + 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;
> +} SunGEMState;
> +
> +
> +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) {
> + nc->info->receive(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 int 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 0;
> + }
> + if ((rxdma_cfg & RXDMA_CFG_ENABLE) == 0) {
> + trace_sungem_rx_txdma_disabled();
> + return 0;
> + }
> +
> + /* 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;
> + uint8_t smallbuf[60];
> + 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;
> + }
> +
> + /* We don't drop too small frames since we get them in qemu, we pad
> + * them instead. We should probably use the min frame size register
> + * but I don't want to use a variable size staging buffer and I
> + * know both MacOS and Linux use the default 64 anyway. We use 60
> + * here to account for the non-existent FCS.
> + */
> + if (size < 60) {
> + memcpy(smallbuf, buf, size);
> + memset(&smallbuf[size], 0, 60 - size);
> + buf = smallbuf;
> + size = 60;
> + }
> +
> + /* Get MAC crc */
> + mac_crc = crc32(~0, buf, 6);
> +
> + /* 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), NULL);
> +}
> +
> +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;
> + dc->props = 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,
> +};
> +
> +static void sungem_register_types(void)
> +{
> + type_register_static(&sungem_info);
> +}
> +
> +type_init(sungem_register_types)
> diff --git a/hw/net/trace-events b/hw/net/trace-events
> index 27e5482..5f816ef 100644
> --- a/hw/net/trace-events
> +++ b/hw/net/trace-events
> @@ -278,3 +278,47 @@ spapr_vlan_h_send_logical_lan(uint64_t reg, uint64_t continue_token) "H_SEND_LOG
> spapr_vlan_h_send_logical_lan_rxbufs(uint32_t rx_bufs) "rxbufs = %"PRIu32
> spapr_vlan_h_send_logical_lan_buf_desc(uint64_t buf) " buf desc: 0x%"PRIx64
> spapr_vlan_h_send_logical_lan_total(int nbufs, unsigned total_len) "%d buffers, total length 0x%x"
> +
> +# hw/net/sungem.c
> +sungem_tx_checksum(uint16_t start, uint16_t off) "TX checksumming from byte %d, inserting at %d"
> +sungem_tx_checksum_oob(void) "TX checksum out of packet bounds"
> +sungem_tx_unfinished(void) "TX packet started without finishing the previous one"
> +sungem_tx_overflow(void) "TX packet queue overflow"
> +sungem_tx_finished(uint32_t size) "TX completing %"PRIu32 " bytes packet"
> +sungem_tx_kick(void) "TX Kick..."
> +sungem_tx_disabled(void) "TX not enabled"
> +sungem_tx_process(uint32_t comp, uint32_t kick, uint32_t size) "TX processing comp=%"PRIu32", kick=%"PRIu32" out of %"PRIu32
> +sungem_tx_desc(uint32_t comp, uint64_t control, uint64_t buffer) "TX desc %"PRIu32 ": 0x%"PRIx64" 0x%"PRIx64
> +sungem_tx_reset(void) "TX reset"
> +sungem_rx_mac_disabled(void) "Check RX MAC disabled"
> +sungem_rx_txdma_disabled(void) "Check RX TXDMA disabled"
> +sungem_rx_check(bool full, uint32_t kick, uint32_t done) "Check RX %d (kick=%"PRIu32", done=%"PRIu32")"
> +sungem_rx_mac_check(uint32_t mac0, uint32_t mac1, uint32_t mac2) "Word MAC: 0x%"PRIx32" 0x%"PRIx32" 0x%"PRIx32
> +sungem_rx_mac_multicast(void) "Multicast"
> +sungem_rx_mac_compare(uint32_t mac0, uint32_t mac1, uint32_t mac2) "Compare MAC to 0x%"PRIx32" 0x%"PRIx32" 0x%"PRIx32".."
> +sungem_rx_packet(size_t size) "RX got %zu bytes packet"
> +sungem_rx_disabled(void) "RX not enabled"
> +sungem_rx_bad_frame_size(size_t size) "RX bad frame size %zu, dropped"
> +sungem_rx_unmatched(void) "No match, dropped"
> +sungem_rx_process(uint32_t done, uint32_t kick, uint32_t size) "RX processing done=%"PRIu32", kick=%"PRIu32" out of %"PRIu32
> +sungem_rx_ringfull(void) "RX ring full"
> +sungem_rx_desc(uint64_t control, uint64_t buffer) "RX desc: 0x%"PRIx64" 0x%"PRIx64
> +sungem_rx_reset(void) "RX reset"
> +sungem_rx_kick(uint64_t val) "RXDMA_KICK written to %"PRIu64
> +sungem_reset(bool pci_reset) "Full reset (PCI:%d)"
> +sungem_mii_write(uint8_t phy_addr, uint8_t reg_addr, uint16_t val) "MII write addr 0x%x reg 0x%02x val 0x%04x"
> +sungem_mii_read(uint8_t phy_addr, uint8_t reg_addr, uint16_t val) "MII read addr 0x%x reg 0x%02x val 0x%04x"
> +sungem_mii_invalid_sof(uint32_t val) "MII op, invalid SOF field 0x%"PRIx32
> +sungem_mii_invalid_op(uint8_t op) "MII op, invalid op field 0x%x"
> +sungem_mmio_greg_write(uint64_t addr, uint64_t val) "MMIO greg write to 0x%"PRIx64" val=0x%"PRIx64
> +sungem_mmio_greg_read(uint64_t addr, uint64_t val) "MMIO greg read from 0x%"PRIx64" val=0x%"PRIx64
> +sungem_mmio_txdma_write(uint64_t addr, uint64_t val) "MMIO txdma write to 0x%"PRIx64" val=0x%"PRIx64
> +sungem_mmio_txdma_read(uint64_t addr, uint64_t val) "MMIO txdma read from 0x%"PRIx64" val=0x%"PRIx64
> +sungem_mmio_rxdma_write(uint64_t addr, uint64_t val) "MMIO rxdma write to 0x%"PRIx64" val=0x%"PRIx64
> +sungem_mmio_rxdma_read(uint64_t addr, uint64_t val) "MMIO rxdma read from 0x%"PRIx64" val=0x%"PRIx64
> +sungem_mmio_mac_write(uint64_t addr, uint64_t val) "MMIO mac write to 0x%"PRIx64" val=0x%"PRIx64
> +sungem_mmio_mac_read(uint64_t addr, uint64_t val) "MMIO mac read from 0x%"PRIx64" val=0x%"PRIx64
> +sungem_mmio_mif_write(uint64_t addr, uint64_t val) "MMIO mif write to 0x%"PRIx64" val=0x%"PRIx64
> +sungem_mmio_mif_read(uint64_t addr, uint64_t val) "MMIO mif read from 0x%"PRIx64" val=0x%"PRIx64
> +sungem_mmio_pcs_write(uint64_t addr, uint64_t val) "MMIO pcs write to 0x%"PRIx64" val=0x%"PRIx64
> +sungem_mmio_pcs_read(uint64_t addr, uint64_t val) "MMIO pcs read from 0x%"PRIx64" val=0x%"PRIx64
> diff --git a/hw/pci/pci.c b/hw/pci/pci.c
> index 26f346d..9947fc5 100644
> --- a/hw/pci/pci.c
> +++ b/hw/pci/pci.c
> @@ -1803,6 +1803,7 @@ static const char * const pci_nic_models[] = {
> "e1000",
> "pcnet",
> "virtio",
> + "sungem",
> NULL
> };
>
> @@ -1815,6 +1816,7 @@ static const char * const pci_nic_names[] = {
> "e1000",
> "pcnet",
> "virtio-net-pci",
> + "sungem",
> NULL
> };
>
> diff --git a/include/hw/pci/pci_ids.h b/include/hw/pci/pci_ids.h
> index 3752ddc..b9c2bad 100644
> --- a/include/hw/pci/pci_ids.h
> +++ b/include/hw/pci/pci_ids.h
> @@ -183,6 +183,7 @@
> #define PCI_VENDOR_ID_APPLE 0x106b
> #define PCI_DEVICE_ID_APPLE_UNI_N_AGP 0x0020
> #define PCI_DEVICE_ID_APPLE_U3_AGP 0x004b
> +#define PCI_DEVICE_ID_APPLE_UNI_N_GMAC 0x0021
>
> #define PCI_VENDOR_ID_SUN 0x108e
> #define PCI_DEVICE_ID_SUN_EBUS 0x1000
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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