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qemu/hw/net/e1000.c
Gabriel L. Somlo d7a4155265 e1000: factor out checking for auto-negotiation availability 
Also fix minor indentation issues in the surrounding code.

Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Gabriel Somlo <somlo@cmu.edu>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-06-23 17:38:00 +03:00

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/*
* 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 "qemu/iov.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
#define MAXIMUM_ETHERNET_HDR_LEN (14+4)
/*
* HW models:
* E1000_DEV_ID_82540EM works with Windows, Linux, and OS X <= 10.8
* E1000_DEV_ID_82544GC_COPPER appears to work; not well tested
* E1000_DEV_ID_82545EM_COPPER works with Linux and OS X >= 10.6
* Others never tested
*/
typedef struct E1000State_st {
/*< private >*/
PCIDevice parent_obj;
/*< public >*/
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;
QEMUTimer *mit_timer; /* Mitigation timer. */
bool mit_timer_on; /* Mitigation timer is running. */
bool mit_irq_level; /* Tracks interrupt pin level. */
uint32_t mit_ide; /* Tracks E1000_TXD_CMD_IDE bit. */
/* Compatibility flags for migration to/from qemu 1.3.0 and older */
#define E1000_FLAG_AUTONEG_BIT 0
#define E1000_FLAG_MIT_BIT 1
#define E1000_FLAG_AUTONEG (1 << E1000_FLAG_AUTONEG_BIT)
#define E1000_FLAG_MIT (1 << E1000_FLAG_MIT_BIT)
uint32_t compat_flags;
} E1000State;
typedef struct E1000BaseClass {
PCIDeviceClass parent_class;
uint16_t phy_id2;
} E1000BaseClass;
#define TYPE_E1000_BASE "e1000-base"
#define E1000(obj) \
OBJECT_CHECK(E1000State, (obj), TYPE_E1000_BASE)
#define E1000_DEVICE_CLASS(klass) \
OBJECT_CLASS_CHECK(E1000BaseClass, (klass), TYPE_E1000_BASE)
#define E1000_DEVICE_GET_CLASS(obj) \
OBJECT_GET_CLASS(E1000BaseClass, (obj), TYPE_E1000_BASE)
#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), defreg(RDTR), defreg(RADV), defreg(TADV),
defreg(ITR),
};
static void
e1000_link_down(E1000State *s)
{
s->mac_reg[STATUS] &= ~E1000_STATUS_LU;
s->phy_reg[PHY_STATUS] &= ~MII_SR_LINK_STATUS;
s->phy_reg[PHY_STATUS] &= ~MII_SR_AUTONEG_COMPLETE;
s->phy_reg[PHY_LP_ABILITY] &= ~MII_LPAR_LPACK;
}
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);
DBGOUT(PHY, "Start link auto negotiation\n");
timer_mod(s->autoneg_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 500);
}
}
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,
[PHY_AUTONEG_EXP] = PHY_R,
};
/* PHY_ID2 documented in 8254x_GBe_SDM.pdf, pp. 250 */
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] configured per DevId, from e1000_reset() */
[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,
};
/* Helper function, *curr == 0 means the value is not set */
static inline void
mit_update_delay(uint32_t *curr, uint32_t value)
{
if (value && (*curr == 0 || value < *curr)) {
*curr = value;
}
}
static void
set_interrupt_cause(E1000State *s, int index, uint32_t val)
{
PCIDevice *d = PCI_DEVICE(s);
uint32_t pending_ints;
uint32_t mit_delay;
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;
pending_ints = (s->mac_reg[IMS] & s->mac_reg[ICR]);
if (!s->mit_irq_level && pending_ints) {
/*
* Here we detect a potential raising edge. We postpone raising the
* interrupt line if we are inside the mitigation delay window
* (s->mit_timer_on == 1).
* We provide a partial implementation of interrupt mitigation,
* emulating only RADV, TADV and ITR (lower 16 bits, 1024ns units for
* RADV and TADV, 256ns units for ITR). RDTR is only used to enable
* RADV; relative timers based on TIDV and RDTR are not implemented.
*/
if (s->mit_timer_on) {
return;
}
if (s->compat_flags & E1000_FLAG_MIT) {
/* Compute the next mitigation delay according to pending
* interrupts and the current values of RADV (provided
* RDTR!=0), TADV and ITR.
* Then rearm the timer.
*/
mit_delay = 0;
if (s->mit_ide &&
(pending_ints & (E1000_ICR_TXQE | E1000_ICR_TXDW))) {
mit_update_delay(&mit_delay, s->mac_reg[TADV] * 4);
}
if (s->mac_reg[RDTR] && (pending_ints & E1000_ICS_RXT0)) {
mit_update_delay(&mit_delay, s->mac_reg[RADV] * 4);
}
mit_update_delay(&mit_delay, s->mac_reg[ITR]);
if (mit_delay) {
s->mit_timer_on = 1;
timer_mod(s->mit_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
mit_delay * 256);
}
s->mit_ide = 0;
}
}
s->mit_irq_level = (pending_ints != 0);
pci_set_irq(d, s->mit_irq_level);
}
static void
e1000_mit_timer(void *opaque)
{
E1000State *s = opaque;
s->mit_timer_on = 0;
/* Call set_interrupt_cause to update the irq level (if necessary). */
set_interrupt_cause(s, 0, s->mac_reg[ICR]);
}
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 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_LP_ABILITY] |= MII_LPAR_LPACK;
s->phy_reg[PHY_STATUS] |= MII_SR_AUTONEG_COMPLETE;
DBGOUT(PHY, "Auto negotiation is completed\n");
set_ics(s, 0, E1000_ICS_LSC); /* signal link status change to guest */
}
}
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;
E1000BaseClass *edc = E1000_DEVICE_GET_CLASS(d);
uint8_t *macaddr = d->conf.macaddr.a;
int i;
timer_del(d->autoneg_timer);
timer_del(d->mit_timer);
d->mit_timer_on = 0;
d->mit_irq_level = 0;
d->mit_ide = 0;
memset(d->phy_reg, 0, sizeof d->phy_reg);
memmove(d->phy_reg, phy_reg_init, sizeof phy_reg_init);
d->phy_reg[PHY_ID2] = edc->phy_id2;
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;
}
qemu_format_nic_info_str(qemu_get_queue(d->nic), macaddr);
}
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);
stw_be_p(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
stw_be_p(tp->data+css+2, tp->size - css);
stw_be_p(tp->data+css+4,
be16_to_cpup((uint16_t *)(tp->data+css+4))+frames);
} else // IPv6
stw_be_p(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;
stl_be_p(tp->data+css+4, ldl_be_p(tp->data+css+4)+sofar); /* seq */
if (tp->paylen - sofar > tp->mss)
tp->data[css + 13] &= ~9; // PSH, FIN
} else // UDP
stw_be_p(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);
stw_be_p(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)
{
PCIDevice *d = PCI_DEVICE(s);
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;
uint64_t addr;
struct e1000_context_desc *xp = (struct e1000_context_desc *)dp;
struct e1000_tx *tp = &s->tx;
s->mit_ide |= (txd_lower & E1000_TXD_CMD_IDE);
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;
stw_be_p(tp->vlan_header,
le16_to_cpup((uint16_t *)(s->mac_reg + VET)));
stw_be_p(tp->vlan_header + 2,
le16_to_cpu(dp->upper.fields.special));
}
addr = le64_to_cpu(dp->buffer_addr);
if (tp->tse && tp->cptse) {
msh = tp->hdr_len + 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(d, addr, tp->data + tp->size, bytes);
sz = tp->size + bytes;
if (sz >= tp->hdr_len && tp->size < tp->hdr_len) {
memmove(tp->header, tp->data, tp->hdr_len);
}
tp->size = sz;
addr += bytes;
if (sz == msh) {
xmit_seg(s);
memmove(tp->data, tp->header, tp->hdr_len);
tp->size = tp->hdr_len;
}
} 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(d, 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 < tp->hdr_len)) {
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)
{
PCIDevice *d = PCI_DEVICE(s);
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(d, 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)
{
PCIDevice *d = PCI_DEVICE(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(d, 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 bool
have_autoneg(E1000State *s)
{
return (s->compat_flags & E1000_FLAG_AUTONEG) &&
(s->phy_reg[PHY_CTRL] & MII_CR_AUTO_NEG_EN) &&
(s->phy_reg[PHY_CTRL] & MII_CR_RESTART_AUTO_NEG);
}
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 {
if (have_autoneg(s) &&
!(s->phy_reg[PHY_STATUS] & MII_SR_AUTONEG_COMPLETE)) {
/* emulate auto-negotiation if supported */
timer_mod(s->autoneg_timer,
qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 500);
} 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_iov(NetClientState *nc, const struct iovec *iov, int iovcnt)
{
E1000State *s = qemu_get_nic_opaque(nc);
PCIDevice *d = PCI_DEVICE(s);
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;
uint8_t min_buf[MIN_BUF_SIZE];
struct iovec min_iov;
uint8_t *filter_buf = iov->iov_base;
size_t size = iov_size(iov, iovcnt);
size_t iov_ofs = 0;
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)) {
iov_to_buf(iov, iovcnt, 0, min_buf, size);
memset(&min_buf[size], 0, sizeof(min_buf) - size);
min_iov.iov_base = filter_buf = min_buf;
min_iov.iov_len = size = sizeof(min_buf);
iovcnt = 1;
iov = &min_iov;
} else if (iov->iov_len < MAXIMUM_ETHERNET_HDR_LEN) {
/* This is very unlikely, but may happen. */
iov_to_buf(iov, iovcnt, 0, min_buf, MAXIMUM_ETHERNET_HDR_LEN);
filter_buf = 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, filter_buf, size)) {
return size;
}
if (vlan_enabled(s) && is_vlan_packet(s, filter_buf)) {
vlan_special = cpu_to_le16(be16_to_cpup((uint16_t *)(filter_buf
+ 14)));
iov_ofs = 4;
if (filter_buf == iov->iov_base) {
memmove(filter_buf + 4, filter_buf, 12);
} else {
iov_from_buf(iov, iovcnt, 4, filter_buf, 12);
while (iov->iov_len <= iov_ofs) {
iov_ofs -= iov->iov_len;
iov++;
}
}
vlan_status = E1000_RXD_STAT_VP;
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(d, 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 iov_copy;
hwaddr ba = le64_to_cpu(desc.buffer_addr);
size_t copy_size = size - desc_offset;
if (copy_size > s->rxbuf_size) {
copy_size = s->rxbuf_size;
}
do {
iov_copy = MIN(copy_size, iov->iov_len - iov_ofs);
pci_dma_write(d, ba, iov->iov_base + iov_ofs, iov_copy);
copy_size -= iov_copy;
ba += iov_copy;
iov_ofs += iov_copy;
if (iov_ofs == iov->iov_len) {
iov++;
iov_ofs = 0;
}
} while (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(d, 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 ssize_t
e1000_receive(NetClientState *nc, const uint8_t *buf, size_t size)
{
const struct iovec iov = {
.iov_base = (uint8_t *)buf,
.iov_len = size
};
return e1000_receive_iov(nc, &iov, 1);
}
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)
{
uint32_t macaddr[2];
s->mac_reg[index] = val;
if (index == RA + 1) {
macaddr[0] = cpu_to_le32(s->mac_reg[RA]);
macaddr[1] = cpu_to_le32(s->mac_reg[RA + 1]);
qemu_format_nic_info_str(qemu_get_queue(s->nic), (uint8_t *)macaddr);
}
}
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), getreg(RDTR), getreg(RADV),
getreg(TADV), getreg(ITR),
[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,
[RDTR] = set_16bit, [RADV] = set_16bit, [TADV] = set_16bit,
[ITR] = set_16bit,
[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 the mitigation timer is active, emulate a timeout now. */
if (s->mit_timer_on) {
e1000_mit_timer(s);
}
/*
* If link is down and auto-negotiation is supported and ongoing,
* complete auto-negotiation immediately. This allows us to look
* at MII_SR_AUTONEG_COMPLETE to infer link status on load.
*/
if (nc->link_down && have_autoneg(s)) {
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);
if (!(s->compat_flags & E1000_FLAG_MIT)) {
s->mac_reg[ITR] = s->mac_reg[RDTR] = s->mac_reg[RADV] =
s->mac_reg[TADV] = 0;
s->mit_irq_level = false;
}
s->mit_ide = 0;
s->mit_timer_on = false;
/* 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 (have_autoneg(s) &&
!(s->phy_reg[PHY_STATUS] & MII_SR_AUTONEG_COMPLETE)) {
nc->link_down = false;
timer_mod(s->autoneg_timer,
qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 500);
}
return 0;
}
static bool e1000_mit_state_needed(void *opaque)
{
E1000State *s = opaque;
return s->compat_flags & E1000_FLAG_MIT;
}
static const VMStateDescription vmstate_e1000_mit_state = {
.name = "e1000/mit_state",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(mac_reg[RDTR], E1000State),
VMSTATE_UINT32(mac_reg[RADV], E1000State),
VMSTATE_UINT32(mac_reg[TADV], E1000State),
VMSTATE_UINT32(mac_reg[ITR], E1000State),
VMSTATE_BOOL(mit_irq_level, E1000State),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_e1000 = {
.name = "e1000",
.version_id = 2,
.minimum_version_id = 1,
.pre_save = e1000_pre_save,
.post_load = e1000_post_load,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(parent_obj, 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()
},
.subsections = (VMStateSubsection[]) {
{
.vmsd = &vmstate_e1000_mit_state,
.needed = e1000_mit_state_needed,
}, {
/* empty */
}
}
};
/*
* EEPROM contents documented in Tables 5-2 and 5-3, pp. 98-102.
* Note: A valid DevId will be inserted during pci_e1000_init().
*/
static const uint16_t e1000_eeprom_template[64] = {
0x0000, 0x0000, 0x0000, 0x0000, 0xffff, 0x0000, 0x0000, 0x0000,
0x3000, 0x1000, 0x6403, 0 /*DevId*/, 0x8086, 0 /*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, OBJECT(d), &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, OBJECT(d), &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 = E1000(dev);
timer_del(d->autoneg_timer);
timer_free(d->autoneg_timer);
timer_del(d->mit_timer);
timer_free(d->mit_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,
.receive_iov = e1000_receive_iov,
.cleanup = e1000_cleanup,
.link_status_changed = e1000_set_link_status,
};
static int pci_e1000_init(PCIDevice *pci_dev)
{
DeviceState *dev = DEVICE(pci_dev);
E1000State *d = E1000(pci_dev);
PCIDeviceClass *pdc = PCI_DEVICE_GET_CLASS(pci_dev);
uint8_t *pci_conf;
uint16_t checksum = 0;
int i;
uint8_t *macaddr;
pci_conf = pci_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(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
pci_register_bar(pci_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];
d->eeprom_data[11] = d->eeprom_data[13] = pdc->device_id;
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)), dev->id, d);
qemu_format_nic_info_str(qemu_get_queue(d->nic), macaddr);
add_boot_device_path(d->conf.bootindex, dev, "/ethernet-phy@0");
d->autoneg_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, e1000_autoneg_timer, d);
d->mit_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, e1000_mit_timer, d);
return 0;
}
static void qdev_e1000_reset(DeviceState *dev)
{
E1000State *d = E1000(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_BIT("mitigation", E1000State,
compat_flags, E1000_FLAG_MIT_BIT, true),
DEFINE_PROP_END_OF_LIST(),
};
typedef struct E1000Info {
const char *name;
uint16_t device_id;
uint8_t revision;
uint16_t phy_id2;
} E1000Info;
static void e1000_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
E1000BaseClass *e = E1000_DEVICE_CLASS(klass);
const E1000Info *info = data;
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 = info->device_id;
k->revision = info->revision;
e->phy_id2 = info->phy_id2;
k->class_id = PCI_CLASS_NETWORK_ETHERNET;
set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
dc->desc = "Intel Gigabit Ethernet";
dc->reset = qdev_e1000_reset;
dc->vmsd = &vmstate_e1000;
dc->props = e1000_properties;
}
static const TypeInfo e1000_base_info = {
.name = TYPE_E1000_BASE,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(E1000State),
.class_size = sizeof(E1000BaseClass),
.abstract = true,
};
static const E1000Info e1000_devices[] = {
{
.name = "e1000-82540em",
.device_id = E1000_DEV_ID_82540EM,
.revision = 0x03,
.phy_id2 = E1000_PHY_ID2_8254xx_DEFAULT,
},
{
.name = "e1000-82544gc",
.device_id = E1000_DEV_ID_82544GC_COPPER,
.revision = 0x03,
.phy_id2 = E1000_PHY_ID2_82544x,
},
{
.name = "e1000-82545em",
.device_id = E1000_DEV_ID_82545EM_COPPER,
.revision = 0x03,
.phy_id2 = E1000_PHY_ID2_8254xx_DEFAULT,
},
};
static const TypeInfo e1000_default_info = {
.name = "e1000",
.parent = "e1000-82540em",
};
static void e1000_register_types(void)
{
int i;
type_register_static(&e1000_base_info);
for (i = 0; i < ARRAY_SIZE(e1000_devices); i++) {
const E1000Info *info = &e1000_devices[i];
TypeInfo type_info = {};
type_info.name = info->name;
type_info.parent = TYPE_E1000_BASE;
type_info.class_data = (void *)info;
type_info.class_init = e1000_class_init;
type_register(&type_info);
}
type_register_static(&e1000_default_info);
}
type_init(e1000_register_types)
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