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-rw-r--r--hw/net/e1000.c1404
1 files changed, 1404 insertions, 0 deletions
diff --git a/hw/net/e1000.c b/hw/net/e1000.c
new file mode 100644
index 0000000000..e6f46f0c51
--- /dev/null
+++ b/hw/net/e1000.c
@@ -0,0 +1,1404 @@
+/*
+ * QEMU e1000 emulation
+ *
+ * Software developer's manual:
+ * http://download.intel.com/design/network/manuals/8254x_GBe_SDM.pdf
+ *
+ * Nir Peleg, Tutis Systems Ltd. for Qumranet Inc.
+ * Copyright (c) 2008 Qumranet
+ * Based on work done by:
+ * Copyright (c) 2007 Dan Aloni
+ * Copyright (c) 2004 Antony T Curtis
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "hw/hw.h"
+#include "hw/pci/pci.h"
+#include "net/net.h"
+#include "net/checksum.h"
+#include "hw/loader.h"
+#include "sysemu/sysemu.h"
+#include "sysemu/dma.h"
+
+#include "e1000_regs.h"
+
+#define E1000_DEBUG
+
+#ifdef E1000_DEBUG
+enum {
+ DEBUG_GENERAL, DEBUG_IO, DEBUG_MMIO, DEBUG_INTERRUPT,
+ DEBUG_RX, DEBUG_TX, DEBUG_MDIC, DEBUG_EEPROM,
+ DEBUG_UNKNOWN, DEBUG_TXSUM, DEBUG_TXERR, DEBUG_RXERR,
+ DEBUG_RXFILTER, DEBUG_PHY, DEBUG_NOTYET,
+};
+#define DBGBIT(x) (1<<DEBUG_##x)
+static int debugflags = DBGBIT(TXERR) | DBGBIT(GENERAL);
+
+#define DBGOUT(what, fmt, ...) do { \
+ if (debugflags & DBGBIT(what)) \
+ fprintf(stderr, "e1000: " fmt, ## __VA_ARGS__); \
+ } while (0)
+#else
+#define DBGOUT(what, fmt, ...) do {} while (0)
+#endif
+
+#define IOPORT_SIZE 0x40
+#define PNPMMIO_SIZE 0x20000
+#define MIN_BUF_SIZE 60 /* Min. octets in an ethernet frame sans FCS */
+
+/* this is the size past which hardware will drop packets when setting LPE=0 */
+#define MAXIMUM_ETHERNET_VLAN_SIZE 1522
+/* this is the size past which hardware will drop packets when setting LPE=1 */
+#define MAXIMUM_ETHERNET_LPE_SIZE 16384
+
+/*
+ * HW models:
+ * E1000_DEV_ID_82540EM works with Windows and Linux
+ * E1000_DEV_ID_82573L OK with windoze and Linux 2.6.22,
+ * appears to perform better than 82540EM, but breaks with Linux 2.6.18
+ * E1000_DEV_ID_82544GC_COPPER appears to work; not well tested
+ * Others never tested
+ */
+enum { E1000_DEVID = E1000_DEV_ID_82540EM };
+
+/*
+ * May need to specify additional MAC-to-PHY entries --
+ * Intel's Windows driver refuses to initialize unless they match
+ */
+enum {
+ PHY_ID2_INIT = E1000_DEVID == E1000_DEV_ID_82573L ? 0xcc2 :
+ E1000_DEVID == E1000_DEV_ID_82544GC_COPPER ? 0xc30 :
+ /* default to E1000_DEV_ID_82540EM */ 0xc20
+};
+
+typedef struct E1000State_st {
+ PCIDevice dev;
+ NICState *nic;
+ NICConf conf;
+ MemoryRegion mmio;
+ MemoryRegion io;
+
+ uint32_t mac_reg[0x8000];
+ uint16_t phy_reg[0x20];
+ uint16_t eeprom_data[64];
+
+ uint32_t rxbuf_size;
+ uint32_t rxbuf_min_shift;
+ struct e1000_tx {
+ unsigned char header[256];
+ unsigned char vlan_header[4];
+ /* Fields vlan and data must not be reordered or separated. */
+ unsigned char vlan[4];
+ unsigned char data[0x10000];
+ uint16_t size;
+ unsigned char sum_needed;
+ unsigned char vlan_needed;
+ uint8_t ipcss;
+ uint8_t ipcso;
+ uint16_t ipcse;
+ uint8_t tucss;
+ uint8_t tucso;
+ uint16_t tucse;
+ uint8_t hdr_len;
+ uint16_t mss;
+ uint32_t paylen;
+ uint16_t tso_frames;
+ char tse;
+ int8_t ip;
+ int8_t tcp;
+ char cptse; // current packet tse bit
+ } tx;
+
+ struct {
+ uint32_t val_in; // shifted in from guest driver
+ uint16_t bitnum_in;
+ uint16_t bitnum_out;
+ uint16_t reading;
+ uint32_t old_eecd;
+ } eecd_state;
+
+ QEMUTimer *autoneg_timer;
+
+/* Compatibility flags for migration to/from qemu 1.3.0 and older */
+#define E1000_FLAG_AUTONEG_BIT 0
+#define E1000_FLAG_AUTONEG (1 << E1000_FLAG_AUTONEG_BIT)
+ uint32_t compat_flags;
+} E1000State;
+
+#define defreg(x) x = (E1000_##x>>2)
+enum {
+ defreg(CTRL), defreg(EECD), defreg(EERD), defreg(GPRC),
+ defreg(GPTC), defreg(ICR), defreg(ICS), defreg(IMC),
+ defreg(IMS), defreg(LEDCTL), defreg(MANC), defreg(MDIC),
+ defreg(MPC), defreg(PBA), defreg(RCTL), defreg(RDBAH),
+ defreg(RDBAL), defreg(RDH), defreg(RDLEN), defreg(RDT),
+ defreg(STATUS), defreg(SWSM), defreg(TCTL), defreg(TDBAH),
+ defreg(TDBAL), defreg(TDH), defreg(TDLEN), defreg(TDT),
+ defreg(TORH), defreg(TORL), defreg(TOTH), defreg(TOTL),
+ defreg(TPR), defreg(TPT), defreg(TXDCTL), defreg(WUFC),
+ defreg(RA), defreg(MTA), defreg(CRCERRS),defreg(VFTA),
+ defreg(VET),
+};
+
+static void
+e1000_link_down(E1000State *s)
+{
+ s->mac_reg[STATUS] &= ~E1000_STATUS_LU;
+ s->phy_reg[PHY_STATUS] &= ~MII_SR_LINK_STATUS;
+}
+
+static void
+e1000_link_up(E1000State *s)
+{
+ s->mac_reg[STATUS] |= E1000_STATUS_LU;
+ s->phy_reg[PHY_STATUS] |= MII_SR_LINK_STATUS;
+}
+
+static void
+set_phy_ctrl(E1000State *s, int index, uint16_t val)
+{
+ /*
+ * QEMU 1.3 does not support link auto-negotiation emulation, so if we
+ * migrate during auto negotiation, after migration the link will be
+ * down.
+ */
+ if (!(s->compat_flags & E1000_FLAG_AUTONEG)) {
+ return;
+ }
+ if ((val & MII_CR_AUTO_NEG_EN) && (val & MII_CR_RESTART_AUTO_NEG)) {
+ e1000_link_down(s);
+ s->phy_reg[PHY_STATUS] &= ~MII_SR_AUTONEG_COMPLETE;
+ DBGOUT(PHY, "Start link auto negotiation\n");
+ qemu_mod_timer(s->autoneg_timer, qemu_get_clock_ms(vm_clock) + 500);
+ }
+}
+
+static void
+e1000_autoneg_timer(void *opaque)
+{
+ E1000State *s = opaque;
+ if (!qemu_get_queue(s->nic)->link_down) {
+ e1000_link_up(s);
+ }
+ s->phy_reg[PHY_STATUS] |= MII_SR_AUTONEG_COMPLETE;
+ DBGOUT(PHY, "Auto negotiation is completed\n");
+}
+
+static void (*phyreg_writeops[])(E1000State *, int, uint16_t) = {
+ [PHY_CTRL] = set_phy_ctrl,
+};
+
+enum { NPHYWRITEOPS = ARRAY_SIZE(phyreg_writeops) };
+
+enum { PHY_R = 1, PHY_W = 2, PHY_RW = PHY_R | PHY_W };
+static const char phy_regcap[0x20] = {
+ [PHY_STATUS] = PHY_R, [M88E1000_EXT_PHY_SPEC_CTRL] = PHY_RW,
+ [PHY_ID1] = PHY_R, [M88E1000_PHY_SPEC_CTRL] = PHY_RW,
+ [PHY_CTRL] = PHY_RW, [PHY_1000T_CTRL] = PHY_RW,
+ [PHY_LP_ABILITY] = PHY_R, [PHY_1000T_STATUS] = PHY_R,
+ [PHY_AUTONEG_ADV] = PHY_RW, [M88E1000_RX_ERR_CNTR] = PHY_R,
+ [PHY_ID2] = PHY_R, [M88E1000_PHY_SPEC_STATUS] = PHY_R
+};
+
+static const uint16_t phy_reg_init[] = {
+ [PHY_CTRL] = 0x1140,
+ [PHY_STATUS] = 0x794d, /* link initially up with not completed autoneg */
+ [PHY_ID1] = 0x141, [PHY_ID2] = PHY_ID2_INIT,
+ [PHY_1000T_CTRL] = 0x0e00, [M88E1000_PHY_SPEC_CTRL] = 0x360,
+ [M88E1000_EXT_PHY_SPEC_CTRL] = 0x0d60, [PHY_AUTONEG_ADV] = 0xde1,
+ [PHY_LP_ABILITY] = 0x1e0, [PHY_1000T_STATUS] = 0x3c00,
+ [M88E1000_PHY_SPEC_STATUS] = 0xac00,
+};
+
+static const uint32_t mac_reg_init[] = {
+ [PBA] = 0x00100030,
+ [LEDCTL] = 0x602,
+ [CTRL] = E1000_CTRL_SWDPIN2 | E1000_CTRL_SWDPIN0 |
+ E1000_CTRL_SPD_1000 | E1000_CTRL_SLU,
+ [STATUS] = 0x80000000 | E1000_STATUS_GIO_MASTER_ENABLE |
+ E1000_STATUS_ASDV | E1000_STATUS_MTXCKOK |
+ E1000_STATUS_SPEED_1000 | E1000_STATUS_FD |
+ E1000_STATUS_LU,
+ [MANC] = E1000_MANC_EN_MNG2HOST | E1000_MANC_RCV_TCO_EN |
+ E1000_MANC_ARP_EN | E1000_MANC_0298_EN |
+ E1000_MANC_RMCP_EN,
+};
+
+static void
+set_interrupt_cause(E1000State *s, int index, uint32_t val)
+{
+ if (val && (E1000_DEVID >= E1000_DEV_ID_82547EI_MOBILE)) {
+ /* Only for 8257x */
+ val |= E1000_ICR_INT_ASSERTED;
+ }
+ s->mac_reg[ICR] = val;
+
+ /*
+ * Make sure ICR and ICS registers have the same value.
+ * The spec says that the ICS register is write-only. However in practice,
+ * on real hardware ICS is readable, and for reads it has the same value as
+ * ICR (except that ICS does not have the clear on read behaviour of ICR).
+ *
+ * The VxWorks PRO/1000 driver uses this behaviour.
+ */
+ s->mac_reg[ICS] = val;
+
+ qemu_set_irq(s->dev.irq[0], (s->mac_reg[IMS] & s->mac_reg[ICR]) != 0);
+}
+
+static void
+set_ics(E1000State *s, int index, uint32_t val)
+{
+ DBGOUT(INTERRUPT, "set_ics %x, ICR %x, IMR %x\n", val, s->mac_reg[ICR],
+ s->mac_reg[IMS]);
+ set_interrupt_cause(s, 0, val | s->mac_reg[ICR]);
+}
+
+static int
+rxbufsize(uint32_t v)
+{
+ v &= E1000_RCTL_BSEX | E1000_RCTL_SZ_16384 | E1000_RCTL_SZ_8192 |
+ E1000_RCTL_SZ_4096 | E1000_RCTL_SZ_2048 | E1000_RCTL_SZ_1024 |
+ E1000_RCTL_SZ_512 | E1000_RCTL_SZ_256;
+ switch (v) {
+ case E1000_RCTL_BSEX | E1000_RCTL_SZ_16384:
+ return 16384;
+ case E1000_RCTL_BSEX | E1000_RCTL_SZ_8192:
+ return 8192;
+ case E1000_RCTL_BSEX | E1000_RCTL_SZ_4096:
+ return 4096;
+ case E1000_RCTL_SZ_1024:
+ return 1024;
+ case E1000_RCTL_SZ_512:
+ return 512;
+ case E1000_RCTL_SZ_256:
+ return 256;
+ }
+ return 2048;
+}
+
+static void e1000_reset(void *opaque)
+{
+ E1000State *d = opaque;
+ uint8_t *macaddr = d->conf.macaddr.a;
+ int i;
+
+ qemu_del_timer(d->autoneg_timer);
+ memset(d->phy_reg, 0, sizeof d->phy_reg);
+ memmove(d->phy_reg, phy_reg_init, sizeof phy_reg_init);
+ memset(d->mac_reg, 0, sizeof d->mac_reg);
+ memmove(d->mac_reg, mac_reg_init, sizeof mac_reg_init);
+ d->rxbuf_min_shift = 1;
+ memset(&d->tx, 0, sizeof d->tx);
+
+ if (qemu_get_queue(d->nic)->link_down) {
+ e1000_link_down(d);
+ }
+
+ /* Some guests expect pre-initialized RAH/RAL (AddrValid flag + MACaddr) */
+ d->mac_reg[RA] = 0;
+ d->mac_reg[RA + 1] = E1000_RAH_AV;
+ for (i = 0; i < 4; i++) {
+ d->mac_reg[RA] |= macaddr[i] << (8 * i);
+ d->mac_reg[RA + 1] |= (i < 2) ? macaddr[i + 4] << (8 * i) : 0;
+ }
+}
+
+static void
+set_ctrl(E1000State *s, int index, uint32_t val)
+{
+ /* RST is self clearing */
+ s->mac_reg[CTRL] = val & ~E1000_CTRL_RST;
+}
+
+static void
+set_rx_control(E1000State *s, int index, uint32_t val)
+{
+ s->mac_reg[RCTL] = val;
+ s->rxbuf_size = rxbufsize(val);
+ s->rxbuf_min_shift = ((val / E1000_RCTL_RDMTS_QUAT) & 3) + 1;
+ DBGOUT(RX, "RCTL: %d, mac_reg[RCTL] = 0x%x\n", s->mac_reg[RDT],
+ s->mac_reg[RCTL]);
+ qemu_flush_queued_packets(qemu_get_queue(s->nic));
+}
+
+static void
+set_mdic(E1000State *s, int index, uint32_t val)
+{
+ uint32_t data = val & E1000_MDIC_DATA_MASK;
+ uint32_t addr = ((val & E1000_MDIC_REG_MASK) >> E1000_MDIC_REG_SHIFT);
+
+ if ((val & E1000_MDIC_PHY_MASK) >> E1000_MDIC_PHY_SHIFT != 1) // phy #
+ val = s->mac_reg[MDIC] | E1000_MDIC_ERROR;
+ else if (val & E1000_MDIC_OP_READ) {
+ DBGOUT(MDIC, "MDIC read reg 0x%x\n", addr);
+ if (!(phy_regcap[addr] & PHY_R)) {
+ DBGOUT(MDIC, "MDIC read reg %x unhandled\n", addr);
+ val |= E1000_MDIC_ERROR;
+ } else
+ val = (val ^ data) | s->phy_reg[addr];
+ } else if (val & E1000_MDIC_OP_WRITE) {
+ DBGOUT(MDIC, "MDIC write reg 0x%x, value 0x%x\n", addr, data);
+ if (!(phy_regcap[addr] & PHY_W)) {
+ DBGOUT(MDIC, "MDIC write reg %x unhandled\n", addr);
+ val |= E1000_MDIC_ERROR;
+ } else {
+ if (addr < NPHYWRITEOPS && phyreg_writeops[addr]) {
+ phyreg_writeops[addr](s, index, data);
+ }
+ s->phy_reg[addr] = data;
+ }
+ }
+ s->mac_reg[MDIC] = val | E1000_MDIC_READY;
+
+ if (val & E1000_MDIC_INT_EN) {
+ set_ics(s, 0, E1000_ICR_MDAC);
+ }
+}
+
+static uint32_t
+get_eecd(E1000State *s, int index)
+{
+ uint32_t ret = E1000_EECD_PRES|E1000_EECD_GNT | s->eecd_state.old_eecd;
+
+ DBGOUT(EEPROM, "reading eeprom bit %d (reading %d)\n",
+ s->eecd_state.bitnum_out, s->eecd_state.reading);
+ if (!s->eecd_state.reading ||
+ ((s->eeprom_data[(s->eecd_state.bitnum_out >> 4) & 0x3f] >>
+ ((s->eecd_state.bitnum_out & 0xf) ^ 0xf))) & 1)
+ ret |= E1000_EECD_DO;
+ return ret;
+}
+
+static void
+set_eecd(E1000State *s, int index, uint32_t val)
+{
+ uint32_t oldval = s->eecd_state.old_eecd;
+
+ s->eecd_state.old_eecd = val & (E1000_EECD_SK | E1000_EECD_CS |
+ E1000_EECD_DI|E1000_EECD_FWE_MASK|E1000_EECD_REQ);
+ if (!(E1000_EECD_CS & val)) // CS inactive; nothing to do
+ return;
+ if (E1000_EECD_CS & (val ^ oldval)) { // CS rise edge; reset state
+ s->eecd_state.val_in = 0;
+ s->eecd_state.bitnum_in = 0;
+ s->eecd_state.bitnum_out = 0;
+ s->eecd_state.reading = 0;
+ }
+ if (!(E1000_EECD_SK & (val ^ oldval))) // no clock edge
+ return;
+ if (!(E1000_EECD_SK & val)) { // falling edge
+ s->eecd_state.bitnum_out++;
+ return;
+ }
+ s->eecd_state.val_in <<= 1;
+ if (val & E1000_EECD_DI)
+ s->eecd_state.val_in |= 1;
+ if (++s->eecd_state.bitnum_in == 9 && !s->eecd_state.reading) {
+ s->eecd_state.bitnum_out = ((s->eecd_state.val_in & 0x3f)<<4)-1;
+ s->eecd_state.reading = (((s->eecd_state.val_in >> 6) & 7) ==
+ EEPROM_READ_OPCODE_MICROWIRE);
+ }
+ DBGOUT(EEPROM, "eeprom bitnum in %d out %d, reading %d\n",
+ s->eecd_state.bitnum_in, s->eecd_state.bitnum_out,
+ s->eecd_state.reading);
+}
+
+static uint32_t
+flash_eerd_read(E1000State *s, int x)
+{
+ unsigned int index, r = s->mac_reg[EERD] & ~E1000_EEPROM_RW_REG_START;
+
+ if ((s->mac_reg[EERD] & E1000_EEPROM_RW_REG_START) == 0)
+ return (s->mac_reg[EERD]);
+
+ if ((index = r >> E1000_EEPROM_RW_ADDR_SHIFT) > EEPROM_CHECKSUM_REG)
+ return (E1000_EEPROM_RW_REG_DONE | r);
+
+ return ((s->eeprom_data[index] << E1000_EEPROM_RW_REG_DATA) |
+ E1000_EEPROM_RW_REG_DONE | r);
+}
+
+static void
+putsum(uint8_t *data, uint32_t n, uint32_t sloc, uint32_t css, uint32_t cse)
+{
+ uint32_t sum;
+
+ if (cse && cse < n)
+ n = cse + 1;
+ if (sloc < n-1) {
+ sum = net_checksum_add(n-css, data+css);
+ cpu_to_be16wu((uint16_t *)(data + sloc),
+ net_checksum_finish(sum));
+ }
+}
+
+static inline int
+vlan_enabled(E1000State *s)
+{
+ return ((s->mac_reg[CTRL] & E1000_CTRL_VME) != 0);
+}
+
+static inline int
+vlan_rx_filter_enabled(E1000State *s)
+{
+ return ((s->mac_reg[RCTL] & E1000_RCTL_VFE) != 0);
+}
+
+static inline int
+is_vlan_packet(E1000State *s, const uint8_t *buf)
+{
+ return (be16_to_cpup((uint16_t *)(buf + 12)) ==
+ le16_to_cpup((uint16_t *)(s->mac_reg + VET)));
+}
+
+static inline int
+is_vlan_txd(uint32_t txd_lower)
+{
+ return ((txd_lower & E1000_TXD_CMD_VLE) != 0);
+}
+
+/* FCS aka Ethernet CRC-32. We don't get it from backends and can't
+ * fill it in, just pad descriptor length by 4 bytes unless guest
+ * told us to strip it off the packet. */
+static inline int
+fcs_len(E1000State *s)
+{
+ return (s->mac_reg[RCTL] & E1000_RCTL_SECRC) ? 0 : 4;
+}
+
+static void
+e1000_send_packet(E1000State *s, const uint8_t *buf, int size)
+{
+ NetClientState *nc = qemu_get_queue(s->nic);
+ if (s->phy_reg[PHY_CTRL] & MII_CR_LOOPBACK) {
+ nc->info->receive(nc, buf, size);
+ } else {
+ qemu_send_packet(nc, buf, size);
+ }
+}
+
+static void
+xmit_seg(E1000State *s)
+{
+ uint16_t len, *sp;
+ unsigned int frames = s->tx.tso_frames, css, sofar, n;
+ struct e1000_tx *tp = &s->tx;
+
+ if (tp->tse && tp->cptse) {
+ css = tp->ipcss;
+ DBGOUT(TXSUM, "frames %d size %d ipcss %d\n",
+ frames, tp->size, css);
+ if (tp->ip) { // IPv4
+ cpu_to_be16wu((uint16_t *)(tp->data+css+2),
+ tp->size - css);
+ cpu_to_be16wu((uint16_t *)(tp->data+css+4),
+ be16_to_cpup((uint16_t *)(tp->data+css+4))+frames);
+ } else // IPv6
+ cpu_to_be16wu((uint16_t *)(tp->data+css+4),
+ tp->size - css);
+ css = tp->tucss;
+ len = tp->size - css;
+ DBGOUT(TXSUM, "tcp %d tucss %d len %d\n", tp->tcp, css, len);
+ if (tp->tcp) {
+ sofar = frames * tp->mss;
+ cpu_to_be32wu((uint32_t *)(tp->data+css+4), // seq
+ be32_to_cpupu((uint32_t *)(tp->data+css+4))+sofar);
+ if (tp->paylen - sofar > tp->mss)
+ tp->data[css + 13] &= ~9; // PSH, FIN
+ } else // UDP
+ cpu_to_be16wu((uint16_t *)(tp->data+css+4), len);
+ if (tp->sum_needed & E1000_TXD_POPTS_TXSM) {
+ unsigned int phsum;
+ // add pseudo-header length before checksum calculation
+ sp = (uint16_t *)(tp->data + tp->tucso);
+ phsum = be16_to_cpup(sp) + len;
+ phsum = (phsum >> 16) + (phsum & 0xffff);
+ cpu_to_be16wu(sp, phsum);
+ }
+ tp->tso_frames++;
+ }
+
+ if (tp->sum_needed & E1000_TXD_POPTS_TXSM)
+ putsum(tp->data, tp->size, tp->tucso, tp->tucss, tp->tucse);
+ if (tp->sum_needed & E1000_TXD_POPTS_IXSM)
+ putsum(tp->data, tp->size, tp->ipcso, tp->ipcss, tp->ipcse);
+ if (tp->vlan_needed) {
+ memmove(tp->vlan, tp->data, 4);
+ memmove(tp->data, tp->data + 4, 8);
+ memcpy(tp->data + 8, tp->vlan_header, 4);
+ e1000_send_packet(s, tp->vlan, tp->size + 4);
+ } else
+ e1000_send_packet(s, tp->data, tp->size);
+ s->mac_reg[TPT]++;
+ s->mac_reg[GPTC]++;
+ n = s->mac_reg[TOTL];
+ if ((s->mac_reg[TOTL] += s->tx.size) < n)
+ s->mac_reg[TOTH]++;
+}
+
+static void
+process_tx_desc(E1000State *s, struct e1000_tx_desc *dp)
+{
+ uint32_t txd_lower = le32_to_cpu(dp->lower.data);
+ uint32_t dtype = txd_lower & (E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D);
+ unsigned int split_size = txd_lower & 0xffff, bytes, sz, op;
+ unsigned int msh = 0xfffff, hdr = 0;
+ uint64_t addr;
+ struct e1000_context_desc *xp = (struct e1000_context_desc *)dp;
+ struct e1000_tx *tp = &s->tx;
+
+ if (dtype == E1000_TXD_CMD_DEXT) { // context descriptor
+ op = le32_to_cpu(xp->cmd_and_length);
+ tp->ipcss = xp->lower_setup.ip_fields.ipcss;
+ tp->ipcso = xp->lower_setup.ip_fields.ipcso;
+ tp->ipcse = le16_to_cpu(xp->lower_setup.ip_fields.ipcse);
+ tp->tucss = xp->upper_setup.tcp_fields.tucss;
+ tp->tucso = xp->upper_setup.tcp_fields.tucso;
+ tp->tucse = le16_to_cpu(xp->upper_setup.tcp_fields.tucse);
+ tp->paylen = op & 0xfffff;
+ tp->hdr_len = xp->tcp_seg_setup.fields.hdr_len;
+ tp->mss = le16_to_cpu(xp->tcp_seg_setup.fields.mss);
+ tp->ip = (op & E1000_TXD_CMD_IP) ? 1 : 0;
+ tp->tcp = (op & E1000_TXD_CMD_TCP) ? 1 : 0;
+ tp->tse = (op & E1000_TXD_CMD_TSE) ? 1 : 0;
+ tp->tso_frames = 0;
+ if (tp->tucso == 0) { // this is probably wrong
+ DBGOUT(TXSUM, "TCP/UDP: cso 0!\n");
+ tp->tucso = tp->tucss + (tp->tcp ? 16 : 6);
+ }
+ return;
+ } else if (dtype == (E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D)) {
+ // data descriptor
+ if (tp->size == 0) {
+ tp->sum_needed = le32_to_cpu(dp->upper.data) >> 8;
+ }
+ tp->cptse = ( txd_lower & E1000_TXD_CMD_TSE ) ? 1 : 0;
+ } else {
+ // legacy descriptor
+ tp->cptse = 0;
+ }
+
+ if (vlan_enabled(s) && is_vlan_txd(txd_lower) &&
+ (tp->cptse || txd_lower & E1000_TXD_CMD_EOP)) {
+ tp->vlan_needed = 1;
+ cpu_to_be16wu((uint16_t *)(tp->vlan_header),
+ le16_to_cpup((uint16_t *)(s->mac_reg + VET)));
+ cpu_to_be16wu((uint16_t *)(tp->vlan_header + 2),
+ le16_to_cpu(dp->upper.fields.special));
+ }
+
+ addr = le64_to_cpu(dp->buffer_addr);
+ if (tp->tse && tp->cptse) {
+ hdr = tp->hdr_len;
+ msh = hdr + tp->mss;
+ do {
+ bytes = split_size;
+ if (tp->size + bytes > msh)
+ bytes = msh - tp->size;
+
+ bytes = MIN(sizeof(tp->data) - tp->size, bytes);
+ pci_dma_read(&s->dev, addr, tp->data + tp->size, bytes);
+ if ((sz = tp->size + bytes) >= hdr && tp->size < hdr)
+ memmove(tp->header, tp->data, hdr);
+ tp->size = sz;
+ addr += bytes;
+ if (sz == msh) {
+ xmit_seg(s);
+ memmove(tp->data, tp->header, hdr);
+ tp->size = hdr;
+ }
+ } while (split_size -= bytes);
+ } else if (!tp->tse && tp->cptse) {
+ // context descriptor TSE is not set, while data descriptor TSE is set
+ DBGOUT(TXERR, "TCP segmentation error\n");
+ } else {
+ split_size = MIN(sizeof(tp->data) - tp->size, split_size);
+ pci_dma_read(&s->dev, addr, tp->data + tp->size, split_size);
+ tp->size += split_size;
+ }
+
+ if (!(txd_lower & E1000_TXD_CMD_EOP))
+ return;
+ if (!(tp->tse && tp->cptse && tp->size < hdr))
+ xmit_seg(s);
+ tp->tso_frames = 0;
+ tp->sum_needed = 0;
+ tp->vlan_needed = 0;
+ tp->size = 0;
+ tp->cptse = 0;
+}
+
+static uint32_t
+txdesc_writeback(E1000State *s, dma_addr_t base, struct e1000_tx_desc *dp)
+{
+ uint32_t txd_upper, txd_lower = le32_to_cpu(dp->lower.data);
+
+ if (!(txd_lower & (E1000_TXD_CMD_RS|E1000_TXD_CMD_RPS)))
+ return 0;
+ txd_upper = (le32_to_cpu(dp->upper.data) | E1000_TXD_STAT_DD) &
+ ~(E1000_TXD_STAT_EC | E1000_TXD_STAT_LC | E1000_TXD_STAT_TU);
+ dp->upper.data = cpu_to_le32(txd_upper);
+ pci_dma_write(&s->dev, base + ((char *)&dp->upper - (char *)dp),
+ &dp->upper, sizeof(dp->upper));
+ return E1000_ICR_TXDW;
+}
+
+static uint64_t tx_desc_base(E1000State *s)
+{
+ uint64_t bah = s->mac_reg[TDBAH];
+ uint64_t bal = s->mac_reg[TDBAL] & ~0xf;
+
+ return (bah << 32) + bal;
+}
+
+static void
+start_xmit(E1000State *s)
+{
+ dma_addr_t base;
+ struct e1000_tx_desc desc;
+ uint32_t tdh_start = s->mac_reg[TDH], cause = E1000_ICS_TXQE;
+
+ if (!(s->mac_reg[TCTL] & E1000_TCTL_EN)) {
+ DBGOUT(TX, "tx disabled\n");
+ return;
+ }
+
+ while (s->mac_reg[TDH] != s->mac_reg[TDT]) {
+ base = tx_desc_base(s) +
+ sizeof(struct e1000_tx_desc) * s->mac_reg[TDH];
+ pci_dma_read(&s->dev, base, &desc, sizeof(desc));
+
+ DBGOUT(TX, "index %d: %p : %x %x\n", s->mac_reg[TDH],
+ (void *)(intptr_t)desc.buffer_addr, desc.lower.data,
+ desc.upper.data);
+
+ process_tx_desc(s, &desc);
+ cause |= txdesc_writeback(s, base, &desc);
+
+ if (++s->mac_reg[TDH] * sizeof(desc) >= s->mac_reg[TDLEN])
+ s->mac_reg[TDH] = 0;
+ /*
+ * the following could happen only if guest sw assigns
+ * bogus values to TDT/TDLEN.
+ * there's nothing too intelligent we could do about this.
+ */
+ if (s->mac_reg[TDH] == tdh_start) {
+ DBGOUT(TXERR, "TDH wraparound @%x, TDT %x, TDLEN %x\n",
+ tdh_start, s->mac_reg[TDT], s->mac_reg[TDLEN]);
+ break;
+ }
+ }
+ set_ics(s, 0, cause);
+}
+
+static int
+receive_filter(E1000State *s, const uint8_t *buf, int size)
+{
+ static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+ static const int mta_shift[] = {4, 3, 2, 0};
+ uint32_t f, rctl = s->mac_reg[RCTL], ra[2], *rp;
+
+ if (is_vlan_packet(s, buf) && vlan_rx_filter_enabled(s)) {
+ uint16_t vid = be16_to_cpup((uint16_t *)(buf + 14));
+ uint32_t vfta = le32_to_cpup((uint32_t *)(s->mac_reg + VFTA) +
+ ((vid >> 5) & 0x7f));
+ if ((vfta & (1 << (vid & 0x1f))) == 0)
+ return 0;
+ }
+
+ if (rctl & E1000_RCTL_UPE) // promiscuous
+ return 1;
+
+ if ((buf[0] & 1) && (rctl & E1000_RCTL_MPE)) // promiscuous mcast
+ return 1;
+
+ if ((rctl & E1000_RCTL_BAM) && !memcmp(buf, bcast, sizeof bcast))
+ return 1;
+
+ for (rp = s->mac_reg + RA; rp < s->mac_reg + RA + 32; rp += 2) {
+ if (!(rp[1] & E1000_RAH_AV))
+ continue;
+ ra[0] = cpu_to_le32(rp[0]);
+ ra[1] = cpu_to_le32(rp[1]);
+ if (!memcmp(buf, (uint8_t *)ra, 6)) {
+ DBGOUT(RXFILTER,
+ "unicast match[%d]: %02x:%02x:%02x:%02x:%02x:%02x\n",
+ (int)(rp - s->mac_reg - RA)/2,
+ buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
+ return 1;
+ }
+ }
+ DBGOUT(RXFILTER, "unicast mismatch: %02x:%02x:%02x:%02x:%02x:%02x\n",
+ buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
+
+ f = mta_shift[(rctl >> E1000_RCTL_MO_SHIFT) & 3];
+ f = (((buf[5] << 8) | buf[4]) >> f) & 0xfff;
+ if (s->mac_reg[MTA + (f >> 5)] & (1 << (f & 0x1f)))
+ return 1;
+ DBGOUT(RXFILTER,
+ "dropping, inexact filter mismatch: %02x:%02x:%02x:%02x:%02x:%02x MO %d MTA[%d] %x\n",
+ buf[0], buf[1], buf[2], buf[3], buf[4], buf[5],
+ (rctl >> E1000_RCTL_MO_SHIFT) & 3, f >> 5,
+ s->mac_reg[MTA + (f >> 5)]);
+
+ return 0;
+}
+
+static void
+e1000_set_link_status(NetClientState *nc)
+{
+ E1000State *s = qemu_get_nic_opaque(nc);
+ uint32_t old_status = s->mac_reg[STATUS];
+
+ if (nc->link_down) {
+ e1000_link_down(s);
+ } else {
+ e1000_link_up(s);
+ }
+
+ if (s->mac_reg[STATUS] != old_status)
+ set_ics(s, 0, E1000_ICR_LSC);
+}
+
+static bool e1000_has_rxbufs(E1000State *s, size_t total_size)
+{
+ int bufs;
+ /* Fast-path short packets */
+ if (total_size <= s->rxbuf_size) {
+ return s->mac_reg[RDH] != s->mac_reg[RDT];
+ }
+ if (s->mac_reg[RDH] < s->mac_reg[RDT]) {
+ bufs = s->mac_reg[RDT] - s->mac_reg[RDH];
+ } else if (s->mac_reg[RDH] > s->mac_reg[RDT]) {
+ bufs = s->mac_reg[RDLEN] / sizeof(struct e1000_rx_desc) +
+ s->mac_reg[RDT] - s->mac_reg[RDH];
+ } else {
+ return false;
+ }
+ return total_size <= bufs * s->rxbuf_size;
+}
+
+static int
+e1000_can_receive(NetClientState *nc)
+{
+ E1000State *s = qemu_get_nic_opaque(nc);
+
+ return (s->mac_reg[STATUS] & E1000_STATUS_LU) &&
+ (s->mac_reg[RCTL] & E1000_RCTL_EN) && e1000_has_rxbufs(s, 1);
+}
+
+static uint64_t rx_desc_base(E1000State *s)
+{
+ uint64_t bah = s->mac_reg[RDBAH];
+ uint64_t bal = s->mac_reg[RDBAL] & ~0xf;
+
+ return (bah << 32) + bal;
+}
+
+static ssize_t
+e1000_receive(NetClientState *nc, const uint8_t *buf, size_t size)
+{
+ E1000State *s = qemu_get_nic_opaque(nc);
+ struct e1000_rx_desc desc;
+ dma_addr_t base;
+ unsigned int n, rdt;
+ uint32_t rdh_start;
+ uint16_t vlan_special = 0;
+ uint8_t vlan_status = 0, vlan_offset = 0;
+ uint8_t min_buf[MIN_BUF_SIZE];
+ size_t desc_offset;
+ size_t desc_size;
+ size_t total_size;
+
+ if (!(s->mac_reg[STATUS] & E1000_STATUS_LU)) {
+ return -1;
+ }
+
+ if (!(s->mac_reg[RCTL] & E1000_RCTL_EN)) {
+ return -1;
+ }
+
+ /* Pad to minimum Ethernet frame length */
+ if (size < sizeof(min_buf)) {
+ memcpy(min_buf, buf, size);
+ memset(&min_buf[size], 0, sizeof(min_buf) - size);
+ buf = min_buf;
+ size = sizeof(min_buf);
+ }
+
+ /* Discard oversized packets if !LPE and !SBP. */
+ if ((size > MAXIMUM_ETHERNET_LPE_SIZE ||
+ (size > MAXIMUM_ETHERNET_VLAN_SIZE
+ && !(s->mac_reg[RCTL] & E1000_RCTL_LPE)))
+ && !(s->mac_reg[RCTL] & E1000_RCTL_SBP)) {
+ return size;
+ }
+
+ if (!receive_filter(s, buf, size))
+ return size;
+
+ if (vlan_enabled(s) && is_vlan_packet(s, buf)) {
+ vlan_special = cpu_to_le16(be16_to_cpup((uint16_t *)(buf + 14)));
+ memmove((uint8_t *)buf + 4, buf, 12);
+ vlan_status = E1000_RXD_STAT_VP;
+ vlan_offset = 4;
+ size -= 4;
+ }
+
+ rdh_start = s->mac_reg[RDH];
+ desc_offset = 0;
+ total_size = size + fcs_len(s);
+ if (!e1000_has_rxbufs(s, total_size)) {
+ set_ics(s, 0, E1000_ICS_RXO);
+ return -1;
+ }
+ do {
+ desc_size = total_size - desc_offset;
+ if (desc_size > s->rxbuf_size) {
+ desc_size = s->rxbuf_size;
+ }
+ base = rx_desc_base(s) + sizeof(desc) * s->mac_reg[RDH];
+ pci_dma_read(&s->dev, base, &desc, sizeof(desc));
+ desc.special = vlan_special;
+ desc.status |= (vlan_status | E1000_RXD_STAT_DD);
+ if (desc.buffer_addr) {
+ if (desc_offset < size) {
+ size_t copy_size = size - desc_offset;
+ if (copy_size > s->rxbuf_size) {
+ copy_size = s->rxbuf_size;
+ }
+ pci_dma_write(&s->dev, le64_to_cpu(desc.buffer_addr),
+ buf + desc_offset + vlan_offset, copy_size);
+ }
+ desc_offset += desc_size;
+ desc.length = cpu_to_le16(desc_size);
+ if (desc_offset >= total_size) {
+ desc.status |= E1000_RXD_STAT_EOP | E1000_RXD_STAT_IXSM;
+ } else {
+ /* Guest zeroing out status is not a hardware requirement.
+ Clear EOP in case guest didn't do it. */
+ desc.status &= ~E1000_RXD_STAT_EOP;
+ }
+ } else { // as per intel docs; skip descriptors with null buf addr
+ DBGOUT(RX, "Null RX descriptor!!\n");
+ }
+ pci_dma_write(&s->dev, base, &desc, sizeof(desc));
+
+ if (++s->mac_reg[RDH] * sizeof(desc) >= s->mac_reg[RDLEN])
+ s->mac_reg[RDH] = 0;
+ /* see comment in start_xmit; same here */
+ if (s->mac_reg[RDH] == rdh_start) {
+ DBGOUT(RXERR, "RDH wraparound @%x, RDT %x, RDLEN %x\n",
+ rdh_start, s->mac_reg[RDT], s->mac_reg[RDLEN]);
+ set_ics(s, 0, E1000_ICS_RXO);
+ return -1;
+ }
+ } while (desc_offset < total_size);
+
+ s->mac_reg[GPRC]++;
+ s->mac_reg[TPR]++;
+ /* TOR - Total Octets Received:
+ * This register includes bytes received in a packet from the <Destination
+ * Address> field through the <CRC> field, inclusively.
+ */
+ n = s->mac_reg[TORL] + size + /* Always include FCS length. */ 4;
+ if (n < s->mac_reg[TORL])
+ s->mac_reg[TORH]++;
+ s->mac_reg[TORL] = n;
+
+ n = E1000_ICS_RXT0;
+ if ((rdt = s->mac_reg[RDT]) < s->mac_reg[RDH])
+ rdt += s->mac_reg[RDLEN] / sizeof(desc);
+ if (((rdt - s->mac_reg[RDH]) * sizeof(desc)) <= s->mac_reg[RDLEN] >>
+ s->rxbuf_min_shift)
+ n |= E1000_ICS_RXDMT0;
+
+ set_ics(s, 0, n);
+
+ return size;
+}
+
+static uint32_t
+mac_readreg(E1000State *s, int index)
+{
+ return s->mac_reg[index];
+}
+
+static uint32_t
+mac_icr_read(E1000State *s, int index)
+{
+ uint32_t ret = s->mac_reg[ICR];
+
+ DBGOUT(INTERRUPT, "ICR read: %x\n", ret);
+ set_interrupt_cause(s, 0, 0);
+ return ret;
+}
+
+static uint32_t
+mac_read_clr4(E1000State *s, int index)
+{
+ uint32_t ret = s->mac_reg[index];
+
+ s->mac_reg[index] = 0;
+ return ret;
+}
+
+static uint32_t
+mac_read_clr8(E1000State *s, int index)
+{
+ uint32_t ret = s->mac_reg[index];
+
+ s->mac_reg[index] = 0;
+ s->mac_reg[index-1] = 0;
+ return ret;
+}
+
+static void
+mac_writereg(E1000State *s, int index, uint32_t val)
+{
+ s->mac_reg[index] = val;
+}
+
+static void
+set_rdt(E1000State *s, int index, uint32_t val)
+{
+ s->mac_reg[index] = val & 0xffff;
+ if (e1000_has_rxbufs(s, 1)) {
+ qemu_flush_queued_packets(qemu_get_queue(s->nic));
+ }
+}
+
+static void
+set_16bit(E1000State *s, int index, uint32_t val)
+{
+ s->mac_reg[index] = val & 0xffff;
+}
+
+static void
+set_dlen(E1000State *s, int index, uint32_t val)
+{
+ s->mac_reg[index] = val & 0xfff80;
+}
+
+static void
+set_tctl(E1000State *s, int index, uint32_t val)
+{
+ s->mac_reg[index] = val;
+ s->mac_reg[TDT] &= 0xffff;
+ start_xmit(s);
+}
+
+static void
+set_icr(E1000State *s, int index, uint32_t val)
+{
+ DBGOUT(INTERRUPT, "set_icr %x\n", val);
+ set_interrupt_cause(s, 0, s->mac_reg[ICR] & ~val);
+}
+
+static void
+set_imc(E1000State *s, int index, uint32_t val)
+{
+ s->mac_reg[IMS] &= ~val;
+ set_ics(s, 0, 0);
+}
+
+static void
+set_ims(E1000State *s, int index, uint32_t val)
+{
+ s->mac_reg[IMS] |= val;
+ set_ics(s, 0, 0);
+}
+
+#define getreg(x) [x] = mac_readreg
+static uint32_t (*macreg_readops[])(E1000State *, int) = {
+ getreg(PBA), getreg(RCTL), getreg(TDH), getreg(TXDCTL),
+ getreg(WUFC), getreg(TDT), getreg(CTRL), getreg(LEDCTL),
+ getreg(MANC), getreg(MDIC), getreg(SWSM), getreg(STATUS),
+ getreg(TORL), getreg(TOTL), getreg(IMS), getreg(TCTL),
+ getreg(RDH), getreg(RDT), getreg(VET), getreg(ICS),
+ getreg(TDBAL), getreg(TDBAH), getreg(RDBAH), getreg(RDBAL),
+ getreg(TDLEN), getreg(RDLEN),
+
+ [TOTH] = mac_read_clr8, [TORH] = mac_read_clr8, [GPRC] = mac_read_clr4,
+ [GPTC] = mac_read_clr4, [TPR] = mac_read_clr4, [TPT] = mac_read_clr4,
+ [ICR] = mac_icr_read, [EECD] = get_eecd, [EERD] = flash_eerd_read,
+ [CRCERRS ... MPC] = &mac_readreg,
+ [RA ... RA+31] = &mac_readreg,
+ [MTA ... MTA+127] = &mac_readreg,
+ [VFTA ... VFTA+127] = &mac_readreg,
+};
+enum { NREADOPS = ARRAY_SIZE(macreg_readops) };
+
+#define putreg(x) [x] = mac_writereg
+static void (*macreg_writeops[])(E1000State *, int, uint32_t) = {
+ putreg(PBA), putreg(EERD), putreg(SWSM), putreg(WUFC),
+ putreg(TDBAL), putreg(TDBAH), putreg(TXDCTL), putreg(RDBAH),
+ putreg(RDBAL), putreg(LEDCTL), putreg(VET),
+ [TDLEN] = set_dlen, [RDLEN] = set_dlen, [TCTL] = set_tctl,
+ [TDT] = set_tctl, [MDIC] = set_mdic, [ICS] = set_ics,
+ [TDH] = set_16bit, [RDH] = set_16bit, [RDT] = set_rdt,
+ [IMC] = set_imc, [IMS] = set_ims, [ICR] = set_icr,
+ [EECD] = set_eecd, [RCTL] = set_rx_control, [CTRL] = set_ctrl,
+ [RA ... RA+31] = &mac_writereg,
+ [MTA ... MTA+127] = &mac_writereg,
+ [VFTA ... VFTA+127] = &mac_writereg,
+};
+
+enum { NWRITEOPS = ARRAY_SIZE(macreg_writeops) };
+
+static void
+e1000_mmio_write(void *opaque, hwaddr addr, uint64_t val,
+ unsigned size)
+{
+ E1000State *s = opaque;
+ unsigned int index = (addr & 0x1ffff) >> 2;
+
+ if (index < NWRITEOPS && macreg_writeops[index]) {
+ macreg_writeops[index](s, index, val);
+ } else if (index < NREADOPS && macreg_readops[index]) {
+ DBGOUT(MMIO, "e1000_mmio_writel RO %x: 0x%04"PRIx64"\n", index<<2, val);
+ } else {
+ DBGOUT(UNKNOWN, "MMIO unknown write addr=0x%08x,val=0x%08"PRIx64"\n",
+ index<<2, val);
+ }
+}
+
+static uint64_t
+e1000_mmio_read(void *opaque, hwaddr addr, unsigned size)
+{
+ E1000State *s = opaque;
+ unsigned int index = (addr & 0x1ffff) >> 2;
+
+ if (index < NREADOPS && macreg_readops[index])
+ {
+ return macreg_readops[index](s, index);
+ }
+ DBGOUT(UNKNOWN, "MMIO unknown read addr=0x%08x\n", index<<2);
+ return 0;
+}
+
+static const MemoryRegionOps e1000_mmio_ops = {
+ .read = e1000_mmio_read,
+ .write = e1000_mmio_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .impl = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ },
+};
+
+static uint64_t e1000_io_read(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ E1000State *s = opaque;
+
+ (void)s;
+ return 0;
+}
+
+static void e1000_io_write(void *opaque, hwaddr addr,
+ uint64_t val, unsigned size)
+{
+ E1000State *s = opaque;
+
+ (void)s;
+}
+
+static const MemoryRegionOps e1000_io_ops = {
+ .read = e1000_io_read,
+ .write = e1000_io_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+static bool is_version_1(void *opaque, int version_id)
+{
+ return version_id == 1;
+}
+
+static void e1000_pre_save(void *opaque)
+{
+ E1000State *s = opaque;
+ NetClientState *nc = qemu_get_queue(s->nic);
+
+ if (!(s->compat_flags & E1000_FLAG_AUTONEG)) {
+ return;
+ }
+
+ /*
+ * If link is down and auto-negotiation is ongoing, complete
+ * auto-negotiation immediately. This allows is to look at
+ * MII_SR_AUTONEG_COMPLETE to infer link status on load.
+ */
+ if (nc->link_down &&
+ s->phy_reg[PHY_CTRL] & MII_CR_AUTO_NEG_EN &&
+ s->phy_reg[PHY_CTRL] & MII_CR_RESTART_AUTO_NEG) {
+ s->phy_reg[PHY_STATUS] |= MII_SR_AUTONEG_COMPLETE;
+ }
+}
+
+static int e1000_post_load(void *opaque, int version_id)
+{
+ E1000State *s = opaque;
+ NetClientState *nc = qemu_get_queue(s->nic);
+
+ /* nc.link_down can't be migrated, so infer link_down according
+ * to link status bit in mac_reg[STATUS].
+ * Alternatively, restart link negotiation if it was in progress. */
+ nc->link_down = (s->mac_reg[STATUS] & E1000_STATUS_LU) == 0;
+
+ if (!(s->compat_flags & E1000_FLAG_AUTONEG)) {
+ return 0;
+ }
+
+ if (s->phy_reg[PHY_CTRL] & MII_CR_AUTO_NEG_EN &&
+ s->phy_reg[PHY_CTRL] & MII_CR_RESTART_AUTO_NEG &&
+ !(s->phy_reg[PHY_STATUS] & MII_SR_AUTONEG_COMPLETE)) {
+ nc->link_down = false;
+ qemu_mod_timer(s->autoneg_timer, qemu_get_clock_ms(vm_clock) + 500);
+ }
+
+ return 0;
+}
+
+static const VMStateDescription vmstate_e1000 = {
+ .name = "e1000",
+ .version_id = 2,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .pre_save = e1000_pre_save,
+ .post_load = e1000_post_load,
+ .fields = (VMStateField []) {
+ VMSTATE_PCI_DEVICE(dev, E1000State),
+ VMSTATE_UNUSED_TEST(is_version_1, 4), /* was instance id */
+ VMSTATE_UNUSED(4), /* Was mmio_base. */
+ VMSTATE_UINT32(rxbuf_size, E1000State),
+ VMSTATE_UINT32(rxbuf_min_shift, E1000State),
+ VMSTATE_UINT32(eecd_state.val_in, E1000State),
+ VMSTATE_UINT16(eecd_state.bitnum_in, E1000State),
+ VMSTATE_UINT16(eecd_state.bitnum_out, E1000State),
+ VMSTATE_UINT16(eecd_state.reading, E1000State),
+ VMSTATE_UINT32(eecd_state.old_eecd, E1000State),
+ VMSTATE_UINT8(tx.ipcss, E1000State),
+ VMSTATE_UINT8(tx.ipcso, E1000State),
+ VMSTATE_UINT16(tx.ipcse, E1000State),
+ VMSTATE_UINT8(tx.tucss, E1000State),
+ VMSTATE_UINT8(tx.tucso, E1000State),
+ VMSTATE_UINT16(tx.tucse, E1000State),
+ VMSTATE_UINT32(tx.paylen, E1000State),
+ VMSTATE_UINT8(tx.hdr_len, E1000State),
+ VMSTATE_UINT16(tx.mss, E1000State),
+ VMSTATE_UINT16(tx.size, E1000State),
+ VMSTATE_UINT16(tx.tso_frames, E1000State),
+ VMSTATE_UINT8(tx.sum_needed, E1000State),
+ VMSTATE_INT8(tx.ip, E1000State),
+ VMSTATE_INT8(tx.tcp, E1000State),
+ VMSTATE_BUFFER(tx.header, E1000State),
+ VMSTATE_BUFFER(tx.data, E1000State),
+ VMSTATE_UINT16_ARRAY(eeprom_data, E1000State, 64),
+ VMSTATE_UINT16_ARRAY(phy_reg, E1000State, 0x20),
+ VMSTATE_UINT32(mac_reg[CTRL], E1000State),
+ VMSTATE_UINT32(mac_reg[EECD], E1000State),
+ VMSTATE_UINT32(mac_reg[EERD], E1000State),
+ VMSTATE_UINT32(mac_reg[GPRC], E1000State),
+ VMSTATE_UINT32(mac_reg[GPTC], E1000State),
+ VMSTATE_UINT32(mac_reg[ICR], E1000State),
+ VMSTATE_UINT32(mac_reg[ICS], E1000State),
+ VMSTATE_UINT32(mac_reg[IMC], E1000State),
+ VMSTATE_UINT32(mac_reg[IMS], E1000State),
+ VMSTATE_UINT32(mac_reg[LEDCTL], E1000State),
+ VMSTATE_UINT32(mac_reg[MANC], E1000State),
+ VMSTATE_UINT32(mac_reg[MDIC], E1000State),
+ VMSTATE_UINT32(mac_reg[MPC], E1000State),
+ VMSTATE_UINT32(mac_reg[PBA], E1000State),
+ VMSTATE_UINT32(mac_reg[RCTL], E1000State),
+ VMSTATE_UINT32(mac_reg[RDBAH], E1000State),
+ VMSTATE_UINT32(mac_reg[RDBAL], E1000State),
+ VMSTATE_UINT32(mac_reg[RDH], E1000State),
+ VMSTATE_UINT32(mac_reg[RDLEN], E1000State),
+ VMSTATE_UINT32(mac_reg[RDT], E1000State),
+ VMSTATE_UINT32(mac_reg[STATUS], E1000State),
+ VMSTATE_UINT32(mac_reg[SWSM], E1000State),
+ VMSTATE_UINT32(mac_reg[TCTL], E1000State),
+ VMSTATE_UINT32(mac_reg[TDBAH], E1000State),
+ VMSTATE_UINT32(mac_reg[TDBAL], E1000State),
+ VMSTATE_UINT32(mac_reg[TDH], E1000State),
+ VMSTATE_UINT32(mac_reg[TDLEN], E1000State),
+ VMSTATE_UINT32(mac_reg[TDT], E1000State),
+ VMSTATE_UINT32(mac_reg[TORH], E1000State),
+ VMSTATE_UINT32(mac_reg[TORL], E1000State),
+ VMSTATE_UINT32(mac_reg[TOTH], E1000State),
+ VMSTATE_UINT32(mac_reg[TOTL], E1000State),
+ VMSTATE_UINT32(mac_reg[TPR], E1000State),
+ VMSTATE_UINT32(mac_reg[TPT], E1000State),
+ VMSTATE_UINT32(mac_reg[TXDCTL], E1000State),
+ VMSTATE_UINT32(mac_reg[WUFC], E1000State),
+ VMSTATE_UINT32(mac_reg[VET], E1000State),
+ VMSTATE_UINT32_SUB_ARRAY(mac_reg, E1000State, RA, 32),
+ VMSTATE_UINT32_SUB_ARRAY(mac_reg, E1000State, MTA, 128),
+ VMSTATE_UINT32_SUB_ARRAY(mac_reg, E1000State, VFTA, 128),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static const uint16_t e1000_eeprom_template[64] = {
+ 0x0000, 0x0000, 0x0000, 0x0000, 0xffff, 0x0000, 0x0000, 0x0000,
+ 0x3000, 0x1000, 0x6403, E1000_DEVID, 0x8086, E1000_DEVID, 0x8086, 0x3040,
+ 0x0008, 0x2000, 0x7e14, 0x0048, 0x1000, 0x00d8, 0x0000, 0x2700,
+ 0x6cc9, 0x3150, 0x0722, 0x040b, 0x0984, 0x0000, 0xc000, 0x0706,
+ 0x1008, 0x0000, 0x0f04, 0x7fff, 0x4d01, 0xffff, 0xffff, 0xffff,
+ 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
+ 0x0100, 0x4000, 0x121c, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
+ 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0x0000,
+};
+
+/* PCI interface */
+
+static void
+e1000_mmio_setup(E1000State *d)
+{
+ int i;
+ const uint32_t excluded_regs[] = {
+ E1000_MDIC, E1000_ICR, E1000_ICS, E1000_IMS,
+ E1000_IMC, E1000_TCTL, E1000_TDT, PNPMMIO_SIZE
+ };
+
+ memory_region_init_io(&d->mmio, &e1000_mmio_ops, d, "e1000-mmio",
+ PNPMMIO_SIZE);
+ memory_region_add_coalescing(&d->mmio, 0, excluded_regs[0]);
+ for (i = 0; excluded_regs[i] != PNPMMIO_SIZE; i++)
+ memory_region_add_coalescing(&d->mmio, excluded_regs[i] + 4,
+ excluded_regs[i+1] - excluded_regs[i] - 4);
+ memory_region_init_io(&d->io, &e1000_io_ops, d, "e1000-io", IOPORT_SIZE);
+}
+
+static void
+e1000_cleanup(NetClientState *nc)
+{
+ E1000State *s = qemu_get_nic_opaque(nc);
+
+ s->nic = NULL;
+}
+
+static void
+pci_e1000_uninit(PCIDevice *dev)
+{
+ E1000State *d = DO_UPCAST(E1000State, dev, dev);
+
+ qemu_del_timer(d->autoneg_timer);
+ qemu_free_timer(d->autoneg_timer);
+ memory_region_destroy(&d->mmio);
+ memory_region_destroy(&d->io);
+ qemu_del_nic(d->nic);
+}
+
+static NetClientInfo net_e1000_info = {
+ .type = NET_CLIENT_OPTIONS_KIND_NIC,
+ .size = sizeof(NICState),
+ .can_receive = e1000_can_receive,
+ .receive = e1000_receive,
+ .cleanup = e1000_cleanup,
+ .link_status_changed = e1000_set_link_status,
+};
+
+static int pci_e1000_init(PCIDevice *pci_dev)
+{
+ E1000State *d = DO_UPCAST(E1000State, dev, pci_dev);
+ uint8_t *pci_conf;
+ uint16_t checksum = 0;
+ int i;
+ uint8_t *macaddr;
+
+ pci_conf = d->dev.config;
+
+ /* TODO: RST# value should be 0, PCI spec 6.2.4 */
+ pci_conf[PCI_CACHE_LINE_SIZE] = 0x10;
+
+ pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */
+
+ e1000_mmio_setup(d);
+
+ pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
+
+ pci_register_bar(&d->dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->io);
+
+ memmove(d->eeprom_data, e1000_eeprom_template,
+ sizeof e1000_eeprom_template);
+ qemu_macaddr_default_if_unset(&d->conf.macaddr);
+ macaddr = d->conf.macaddr.a;
+ for (i = 0; i < 3; i++)
+ d->eeprom_data[i] = (macaddr[2*i+1]<<8) | macaddr[2*i];
+ for (i = 0; i < EEPROM_CHECKSUM_REG; i++)
+ checksum += d->eeprom_data[i];
+ checksum = (uint16_t) EEPROM_SUM - checksum;
+ d->eeprom_data[EEPROM_CHECKSUM_REG] = checksum;
+
+ d->nic = qemu_new_nic(&net_e1000_info, &d->conf,
+ object_get_typename(OBJECT(d)), d->dev.qdev.id, d);
+
+ qemu_format_nic_info_str(qemu_get_queue(d->nic), macaddr);
+
+ add_boot_device_path(d->conf.bootindex, &pci_dev->qdev, "/ethernet-phy@0");
+
+ d->autoneg_timer = qemu_new_timer_ms(vm_clock, e1000_autoneg_timer, d);
+
+ return 0;
+}
+
+static void qdev_e1000_reset(DeviceState *dev)
+{
+ E1000State *d = DO_UPCAST(E1000State, dev.qdev, dev);
+ e1000_reset(d);
+}
+
+static Property e1000_properties[] = {
+ DEFINE_NIC_PROPERTIES(E1000State, conf),
+ DEFINE_PROP_BIT("autonegotiation", E1000State,
+ compat_flags, E1000_FLAG_AUTONEG_BIT, true),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void e1000_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+
+ k->init = pci_e1000_init;
+ k->exit = pci_e1000_uninit;
+ k->romfile = "efi-e1000.rom";
+ k->vendor_id = PCI_VENDOR_ID_INTEL;
+ k->device_id = E1000_DEVID;
+ k->revision = 0x03;
+ k->class_id = PCI_CLASS_NETWORK_ETHERNET;
+ dc->desc = "Intel Gigabit Ethernet";
+ dc->reset = qdev_e1000_reset;
+ dc->vmsd = &vmstate_e1000;
+ dc->props = e1000_properties;
+}
+
+static const TypeInfo e1000_info = {
+ .name = "e1000",
+ .parent = TYPE_PCI_DEVICE,
+ .instance_size = sizeof(E1000State),
+ .class_init = e1000_class_init,
+};
+
+static void e1000_register_types(void)
+{
+ type_register_static(&e1000_info);
+}
+
+type_init(e1000_register_types)
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-26 22:46:52 +0000