--- /dev/null
+/*
+ * QEMU ETRAX Ethernet Controller.
+ *
+ * Copyright (c) 2008 Edgar E. Iglesias, Axis Communications AB.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include "hw/sysbus.h"
+#include "net/net.h"
+#include "hw/cris/etraxfs.h"
+
+#define D(x)
+
+/* Advertisement control register. */
+#define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */
+#define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */
+#define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */
+#define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */
+
+/*
+ * The MDIO extensions in the TDK PHY model were reversed engineered from the
+ * linux driver (PHYID and Diagnostics reg).
+ * TODO: Add friendly names for the register nums.
+ */
+struct qemu_phy
+{
+ uint32_t regs[32];
+
+ int link;
+
+ unsigned int (*read)(struct qemu_phy *phy, unsigned int req);
+ void (*write)(struct qemu_phy *phy, unsigned int req, unsigned int data);
+};
+
+static unsigned int tdk_read(struct qemu_phy *phy, unsigned int req)
+{
+ int regnum;
+ unsigned r = 0;
+
+ regnum = req & 0x1f;
+
+ switch (regnum) {
+ case 1:
+ if (!phy->link) {
+ break;
+ }
+ /* MR1. */
+ /* Speeds and modes. */
+ r |= (1 << 13) | (1 << 14);
+ r |= (1 << 11) | (1 << 12);
+ r |= (1 << 5); /* Autoneg complete. */
+ r |= (1 << 3); /* Autoneg able. */
+ r |= (1 << 2); /* link. */
+ break;
+ case 5:
+ /* Link partner ability.
+ We are kind; always agree with whatever best mode
+ the guest advertises. */
+ r = 1 << 14; /* Success. */
+ /* Copy advertised modes. */
+ r |= phy->regs[4] & (15 << 5);
+ /* Autoneg support. */
+ r |= 1;
+ break;
+ case 18:
+ {
+ /* Diagnostics reg. */
+ int duplex = 0;
+ int speed_100 = 0;
+
+ if (!phy->link) {
+ break;
+ }
+
+ /* Are we advertising 100 half or 100 duplex ? */
+ speed_100 = !!(phy->regs[4] & ADVERTISE_100HALF);
+ speed_100 |= !!(phy->regs[4] & ADVERTISE_100FULL);
+
+ /* Are we advertising 10 duplex or 100 duplex ? */
+ duplex = !!(phy->regs[4] & ADVERTISE_100FULL);
+ duplex |= !!(phy->regs[4] & ADVERTISE_10FULL);
+ r = (speed_100 << 10) | (duplex << 11);
+ }
+ break;
+
+ default:
+ r = phy->regs[regnum];
+ break;
+ }
+ D(printf("\n%s %x = reg[%d]\n", __func__, r, regnum));
+ return r;
+}
+
+static void
+tdk_write(struct qemu_phy *phy, unsigned int req, unsigned int data)
+{
+ int regnum;
+
+ regnum = req & 0x1f;
+ D(printf("%s reg[%d] = %x\n", __func__, regnum, data));
+ switch (regnum) {
+ default:
+ phy->regs[regnum] = data;
+ break;
+ }
+}
+
+static void
+tdk_init(struct qemu_phy *phy)
+{
+ phy->regs[0] = 0x3100;
+ /* PHY Id. */
+ phy->regs[2] = 0x0300;
+ phy->regs[3] = 0xe400;
+ /* Autonegotiation advertisement reg. */
+ phy->regs[4] = 0x01E1;
+ phy->link = 1;
+
+ phy->read = tdk_read;
+ phy->write = tdk_write;
+}
+
+struct qemu_mdio
+{
+ /* bus. */
+ int mdc;
+ int mdio;
+
+ /* decoder. */
+ enum {
+ PREAMBLE,
+ SOF,
+ OPC,
+ ADDR,
+ REQ,
+ TURNAROUND,
+ DATA
+ } state;
+ unsigned int drive;
+
+ unsigned int cnt;
+ unsigned int addr;
+ unsigned int opc;
+ unsigned int req;
+ unsigned int data;
+
+ struct qemu_phy *devs[32];
+};
+
+static void
+mdio_attach(struct qemu_mdio *bus, struct qemu_phy *phy, unsigned int addr)
+{
+ bus->devs[addr & 0x1f] = phy;
+}
+
+#ifdef USE_THIS_DEAD_CODE
+static void
+mdio_detach(struct qemu_mdio *bus, struct qemu_phy *phy, unsigned int addr)
+{
+ bus->devs[addr & 0x1f] = NULL;
+}
+#endif
+
+static void mdio_read_req(struct qemu_mdio *bus)
+{
+ struct qemu_phy *phy;
+
+ phy = bus->devs[bus->addr];
+ if (phy && phy->read) {
+ bus->data = phy->read(phy, bus->req);
+ } else {
+ bus->data = 0xffff;
+ }
+}
+
+static void mdio_write_req(struct qemu_mdio *bus)
+{
+ struct qemu_phy *phy;
+
+ phy = bus->devs[bus->addr];
+ if (phy && phy->write) {
+ phy->write(phy, bus->req, bus->data);
+ }
+}
+
+static void mdio_cycle(struct qemu_mdio *bus)
+{
+ bus->cnt++;
+
+ D(printf("mdc=%d mdio=%d state=%d cnt=%d drv=%d\n",
+ bus->mdc, bus->mdio, bus->state, bus->cnt, bus->drive));
+#if 0
+ if (bus->mdc) {
+ printf("%d", bus->mdio);
+ }
+#endif
+ switch (bus->state) {
+ case PREAMBLE:
+ if (bus->mdc) {
+ if (bus->cnt >= (32 * 2) && !bus->mdio) {
+ bus->cnt = 0;
+ bus->state = SOF;
+ bus->data = 0;
+ }
+ }
+ break;
+ case SOF:
+ if (bus->mdc) {
+ if (bus->mdio != 1) {
+ printf("WARNING: no SOF\n");
+ }
+ if (bus->cnt == 1*2) {
+ bus->cnt = 0;
+ bus->opc = 0;
+ bus->state = OPC;
+ }
+ }
+ break;
+ case OPC:
+ if (bus->mdc) {
+ bus->opc <<= 1;
+ bus->opc |= bus->mdio & 1;
+ if (bus->cnt == 2*2) {
+ bus->cnt = 0;
+ bus->addr = 0;
+ bus->state = ADDR;
+ }
+ }
+ break;
+ case ADDR:
+ if (bus->mdc) {
+ bus->addr <<= 1;
+ bus->addr |= bus->mdio & 1;
+
+ if (bus->cnt == 5*2) {
+ bus->cnt = 0;
+ bus->req = 0;
+ bus->state = REQ;
+ }
+ }
+ break;
+ case REQ:
+ if (bus->mdc) {
+ bus->req <<= 1;
+ bus->req |= bus->mdio & 1;
+ if (bus->cnt == 5*2) {
+ bus->cnt = 0;
+ bus->state = TURNAROUND;
+ }
+ }
+ break;
+ case TURNAROUND:
+ if (bus->mdc && bus->cnt == 2*2) {
+ bus->mdio = 0;
+ bus->cnt = 0;
+
+ if (bus->opc == 2) {
+ bus->drive = 1;
+ mdio_read_req(bus);
+ bus->mdio = bus->data & 1;
+ }
+ bus->state = DATA;
+ }
+ break;
+ case DATA:
+ if (!bus->mdc) {
+ if (bus->drive) {
+ bus->mdio = !!(bus->data & (1 << 15));
+ bus->data <<= 1;
+ }
+ } else {
+ if (!bus->drive) {
+ bus->data <<= 1;
+ bus->data |= bus->mdio;
+ }
+ if (bus->cnt == 16 * 2) {
+ bus->cnt = 0;
+ bus->state = PREAMBLE;
+ if (!bus->drive) {
+ mdio_write_req(bus);
+ }
+ bus->drive = 0;
+ }
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+/* ETRAX-FS Ethernet MAC block starts here. */
+
+#define RW_MA0_LO 0x00
+#define RW_MA0_HI 0x01
+#define RW_MA1_LO 0x02
+#define RW_MA1_HI 0x03
+#define RW_GA_LO 0x04
+#define RW_GA_HI 0x05
+#define RW_GEN_CTRL 0x06
+#define RW_REC_CTRL 0x07
+#define RW_TR_CTRL 0x08
+#define RW_CLR_ERR 0x09
+#define RW_MGM_CTRL 0x0a
+#define R_STAT 0x0b
+#define FS_ETH_MAX_REGS 0x17
+
+#define TYPE_ETRAX_FS_ETH "etraxfs-eth"
+#define ETRAX_FS_ETH(obj) \
+ OBJECT_CHECK(ETRAXFSEthState, (obj), TYPE_ETRAX_FS_ETH)
+
+typedef struct ETRAXFSEthState
+{
+ SysBusDevice parent_obj;
+
+ MemoryRegion mmio;
+ NICState *nic;
+ NICConf conf;
+
+ /* Two addrs in the filter. */
+ uint8_t macaddr[2][6];
+ uint32_t regs[FS_ETH_MAX_REGS];
+
+ union {
+ void *vdma_out;
+ struct etraxfs_dma_client *dma_out;
+ };
+ union {
+ void *vdma_in;
+ struct etraxfs_dma_client *dma_in;
+ };
+
+ /* MDIO bus. */
+ struct qemu_mdio mdio_bus;
+ unsigned int phyaddr;
+ int duplex_mismatch;
+
+ /* PHY. */
+ struct qemu_phy phy;
+} ETRAXFSEthState;
+
+static void eth_validate_duplex(ETRAXFSEthState *eth)
+{
+ struct qemu_phy *phy;
+ unsigned int phy_duplex;
+ unsigned int mac_duplex;
+ int new_mm = 0;
+
+ phy = eth->mdio_bus.devs[eth->phyaddr];
+ phy_duplex = !!(phy->read(phy, 18) & (1 << 11));
+ mac_duplex = !!(eth->regs[RW_REC_CTRL] & 128);
+
+ if (mac_duplex != phy_duplex) {
+ new_mm = 1;
+ }
+
+ if (eth->regs[RW_GEN_CTRL] & 1) {
+ if (new_mm != eth->duplex_mismatch) {
+ if (new_mm) {
+ printf("HW: WARNING ETH duplex mismatch MAC=%d PHY=%d\n",
+ mac_duplex, phy_duplex);
+ } else {
+ printf("HW: ETH duplex ok.\n");
+ }
+ }
+ eth->duplex_mismatch = new_mm;
+ }
+}
+
+static uint64_t
+eth_read(void *opaque, hwaddr addr, unsigned int size)
+{
+ ETRAXFSEthState *eth = opaque;
+ uint32_t r = 0;
+
+ addr >>= 2;
+
+ switch (addr) {
+ case R_STAT:
+ r = eth->mdio_bus.mdio & 1;
+ break;
+ default:
+ r = eth->regs[addr];
+ D(printf("%s %x\n", __func__, addr * 4));
+ break;
+ }
+ return r;
+}
+
+static void eth_update_ma(ETRAXFSEthState *eth, int ma)
+{
+ int reg;
+ int i = 0;
+
+ ma &= 1;
+
+ reg = RW_MA0_LO;
+ if (ma) {
+ reg = RW_MA1_LO;
+ }
+
+ eth->macaddr[ma][i++] = eth->regs[reg];
+ eth->macaddr[ma][i++] = eth->regs[reg] >> 8;
+ eth->macaddr[ma][i++] = eth->regs[reg] >> 16;
+ eth->macaddr[ma][i++] = eth->regs[reg] >> 24;
+ eth->macaddr[ma][i++] = eth->regs[reg + 1];
+ eth->macaddr[ma][i] = eth->regs[reg + 1] >> 8;
+
+ D(printf("set mac%d=%x.%x.%x.%x.%x.%x\n", ma,
+ eth->macaddr[ma][0], eth->macaddr[ma][1],
+ eth->macaddr[ma][2], eth->macaddr[ma][3],
+ eth->macaddr[ma][4], eth->macaddr[ma][5]));
+}
+
+static void
+eth_write(void *opaque, hwaddr addr,
+ uint64_t val64, unsigned int size)
+{
+ ETRAXFSEthState *eth = opaque;
+ uint32_t value = val64;
+
+ addr >>= 2;
+ switch (addr) {
+ case RW_MA0_LO:
+ case RW_MA0_HI:
+ eth->regs[addr] = value;
+ eth_update_ma(eth, 0);
+ break;
+ case RW_MA1_LO:
+ case RW_MA1_HI:
+ eth->regs[addr] = value;
+ eth_update_ma(eth, 1);
+ break;
+
+ case RW_MGM_CTRL:
+ /* Attach an MDIO/PHY abstraction. */
+ if (value & 2) {
+ eth->mdio_bus.mdio = value & 1;
+ }
+ if (eth->mdio_bus.mdc != (value & 4)) {
+ mdio_cycle(ð->mdio_bus);
+ eth_validate_duplex(eth);
+ }
+ eth->mdio_bus.mdc = !!(value & 4);
+ eth->regs[addr] = value;
+ break;
+
+ case RW_REC_CTRL:
+ eth->regs[addr] = value;
+ eth_validate_duplex(eth);
+ break;
+
+ default:
+ eth->regs[addr] = value;
+ D(printf("%s %x %x\n", __func__, addr, value));
+ break;
+ }
+}
+
+/* The ETRAX FS has a groupt address table (GAT) which works like a k=1 bloom
+ filter dropping group addresses we have not joined. The filter has 64
+ bits (m). The has function is a simple nible xor of the group addr. */
+static int eth_match_groupaddr(ETRAXFSEthState *eth, const unsigned char *sa)
+{
+ unsigned int hsh;
+ int m_individual = eth->regs[RW_REC_CTRL] & 4;
+ int match;
+
+ /* First bit on the wire of a MAC address signals multicast or
+ physical address. */
+ if (!m_individual && !(sa[0] & 1)) {
+ return 0;
+ }
+
+ /* Calculate the hash index for the GA registers. */
+ hsh = 0;
+ hsh ^= (*sa) & 0x3f;
+ hsh ^= ((*sa) >> 6) & 0x03;
+ ++sa;
+ hsh ^= ((*sa) << 2) & 0x03c;
+ hsh ^= ((*sa) >> 4) & 0xf;
+ ++sa;
+ hsh ^= ((*sa) << 4) & 0x30;
+ hsh ^= ((*sa) >> 2) & 0x3f;
+ ++sa;
+ hsh ^= (*sa) & 0x3f;
+ hsh ^= ((*sa) >> 6) & 0x03;
+ ++sa;
+ hsh ^= ((*sa) << 2) & 0x03c;
+ hsh ^= ((*sa) >> 4) & 0xf;
+ ++sa;
+ hsh ^= ((*sa) << 4) & 0x30;
+ hsh ^= ((*sa) >> 2) & 0x3f;
+
+ hsh &= 63;
+ if (hsh > 31) {
+ match = eth->regs[RW_GA_HI] & (1 << (hsh - 32));
+ } else {
+ match = eth->regs[RW_GA_LO] & (1 << hsh);
+ }
+ D(printf("hsh=%x ga=%x.%x mtch=%d\n", hsh,
+ eth->regs[RW_GA_HI], eth->regs[RW_GA_LO], match));
+ return match;
+}
+
+static ssize_t eth_receive(NetClientState *nc, const uint8_t *buf, size_t size)
+{
+ unsigned char sa_bcast[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+ ETRAXFSEthState *eth = qemu_get_nic_opaque(nc);
+ int use_ma0 = eth->regs[RW_REC_CTRL] & 1;
+ int use_ma1 = eth->regs[RW_REC_CTRL] & 2;
+ int r_bcast = eth->regs[RW_REC_CTRL] & 8;
+
+ if (size < 12) {
+ return -1;
+ }
+
+ D(printf("%x.%x.%x.%x.%x.%x ma=%d %d bc=%d\n",
+ buf[0], buf[1], buf[2], buf[3], buf[4], buf[5],
+ use_ma0, use_ma1, r_bcast));
+
+ /* Does the frame get through the address filters? */
+ if ((!use_ma0 || memcmp(buf, eth->macaddr[0], 6))
+ && (!use_ma1 || memcmp(buf, eth->macaddr[1], 6))
+ && (!r_bcast || memcmp(buf, sa_bcast, 6))
+ && !eth_match_groupaddr(eth, buf)) {
+ return size;
+ }
+
+ /* FIXME: Find another way to pass on the fake csum. */
+ etraxfs_dmac_input(eth->dma_in, (void *)buf, size + 4, 1);
+
+ return size;
+}
+
+static int eth_tx_push(void *opaque, unsigned char *buf, int len, bool eop)
+{
+ ETRAXFSEthState *eth = opaque;
+
+ D(printf("%s buf=%p len=%d\n", __func__, buf, len));
+ qemu_send_packet(qemu_get_queue(eth->nic), buf, len);
+ return len;
+}
+
+static void eth_set_link(NetClientState *nc)
+{
+ ETRAXFSEthState *eth = qemu_get_nic_opaque(nc);
+ D(printf("%s %d\n", __func__, nc->link_down));
+ eth->phy.link = !nc->link_down;
+}
+
+static const MemoryRegionOps eth_ops = {
+ .read = eth_read,
+ .write = eth_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 4
+ }
+};
+
+static NetClientInfo net_etraxfs_info = {
+ .type = NET_CLIENT_OPTIONS_KIND_NIC,
+ .size = sizeof(NICState),
+ .receive = eth_receive,
+ .link_status_changed = eth_set_link,
+};
+
+static int fs_eth_init(SysBusDevice *sbd)
+{
+ DeviceState *dev = DEVICE(sbd);
+ ETRAXFSEthState *s = ETRAX_FS_ETH(dev);
+
+ if (!s->dma_out || !s->dma_in) {
+ hw_error("Unconnected ETRAX-FS Ethernet MAC.\n");
+ }
+
+ s->dma_out->client.push = eth_tx_push;
+ s->dma_out->client.opaque = s;
+ s->dma_in->client.opaque = s;
+ s->dma_in->client.pull = NULL;
+
+ memory_region_init_io(&s->mmio, OBJECT(dev), ð_ops, s,
+ "etraxfs-eth", 0x5c);
+ sysbus_init_mmio(sbd, &s->mmio);
+
+ qemu_macaddr_default_if_unset(&s->conf.macaddr);
+ s->nic = qemu_new_nic(&net_etraxfs_info, &s->conf,
+ object_get_typename(OBJECT(s)), dev->id, s);
+ qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
+
+
+ tdk_init(&s->phy);
+ mdio_attach(&s->mdio_bus, &s->phy, s->phyaddr);
+ return 0;
+}
+
+static Property etraxfs_eth_properties[] = {
+ DEFINE_PROP_UINT32("phyaddr", ETRAXFSEthState, phyaddr, 1),
+ DEFINE_PROP_PTR("dma_out", ETRAXFSEthState, vdma_out),
+ DEFINE_PROP_PTR("dma_in", ETRAXFSEthState, vdma_in),
+ DEFINE_NIC_PROPERTIES(ETRAXFSEthState, conf),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void etraxfs_eth_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+ k->init = fs_eth_init;
+ dc->props = etraxfs_eth_properties;
+ /* Reason: pointer properties "dma_out", "dma_in" */
+ dc->cannot_instantiate_with_device_add_yet = true;
+}
+
+static const TypeInfo etraxfs_eth_info = {
+ .name = TYPE_ETRAX_FS_ETH,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(ETRAXFSEthState),
+ .class_init = etraxfs_eth_class_init,
+};
+
+static void etraxfs_eth_register_types(void)
+{
+ type_register_static(&etraxfs_eth_info);
+}
+
+type_init(etraxfs_eth_register_types)
Code Review / kvmfornfv.git / blobdiff