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qemu/hw/net/e1000.c
Leonid Bloch bc0f0674f0 e1000: Introduced an array to control the access to the MAC registers 
The array of uint8_t's which is introduced here, contains access metadata
about the MAC registers: if a register is accessible, but partly implemented,
or if a register requires a certain compatibility flag in order to be
accessed. Currently, 6 hypothetical flags are supported (3 exist for e1000
so far) but in the future, if more than 6 flags will be needed, the datatype
of this array can simply be swapped for a larger one.

This patch is intended to solve the following current problems:

1) In a scenario of migration between different versions of QEMU, which
differ by the MAC registers implemented in them, some registers need not to
be active if a compatibility flag is set, in order to preserve the machine's
state perfectly for the older version. Checking this for each register
individually, would create a lot of clutter in the code.

2) Some registers are (or may be) only partly implemented (e.g.
placeholders that allow reading and writing, but lack other functions).
In such cases it is better to print a debug warning on read/write attempts.
As above, dealing with this functionality on a per-register level, would
require longer and more messy code.

Signed-off-by: Leonid Bloch <leonid.bloch@ravellosystems.com>
Signed-off-by: Dmitry Fleytman <dmitry.fleytman@ravellosystems.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
2015-11-12 15:26:52 +08:00

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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 "qemu/range.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_MAC_BIT 2
#define E1000_FLAG_AUTONEG (1 << E1000_FLAG_AUTONEG_BIT)
#define E1000_FLAG_MIT (1 << E1000_FLAG_MIT_BIT)
#define E1000_FLAG_MAC (1 << E1000_FLAG_MAC_BIT)
uint32_t compat_flags;
} E1000State;
#define chkflag(x) (s->compat_flags & E1000_FLAG_##x)
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;
/* E1000_STATUS_LU is tested by e1000_can_receive() */
qemu_flush_queued_packets(qemu_get_queue(s->nic));
}
static bool
have_autoneg(E1000State *s)
{
return chkflag(AUTONEG) && (s->phy_reg[PHY_CTRL] & MII_CR_AUTO_NEG_EN);
}
static void
set_phy_ctrl(E1000State *s, int index, uint16_t val)
{
/* bits 0-5 reserved; MII_CR_[RESTART_AUTO_NEG,RESET] are self clearing */
s->phy_reg[PHY_CTRL] = val & ~(0x3f |
MII_CR_RESET |
MII_CR_RESTART_AUTO_NEG);
/*
* 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 (have_autoneg(s) && (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] = MII_CR_SPEED_SELECT_MSB |
MII_CR_FULL_DUPLEX |
MII_CR_AUTO_NEG_EN,
[PHY_STATUS] = MII_SR_EXTENDED_CAPS |
MII_SR_LINK_STATUS | /* link initially up */
MII_SR_AUTONEG_CAPS |
/* MII_SR_AUTONEG_COMPLETE: initially NOT completed */
MII_SR_PREAMBLE_SUPPRESS |
MII_SR_EXTENDED_STATUS |
MII_SR_10T_HD_CAPS |
MII_SR_10T_FD_CAPS |
MII_SR_100X_HD_CAPS |
MII_SR_100X_FD_CAPS,
[PHY_ID1] = 0x141,
/* [PHY_ID2] configured per DevId, from e1000_reset() */
[PHY_AUTONEG_ADV] = 0xde1,
[PHY_LP_ABILITY] = 0x1e0,
[PHY_1000T_CTRL] = 0x0e00,
[PHY_1000T_STATUS] = 0x3c00,
[M88E1000_PHY_SPEC_CTRL] = 0x360,
[M88E1000_PHY_SPEC_STATUS] = 0xac00,
[M88E1000_EXT_PHY_SPEC_CTRL] = 0x0d60,
};
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 (chkflag(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);
} else {
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_cpu(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_cpu(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;
}
split_size -= bytes;
} while (bytes && split_size);
} 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 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) &&
(s->parent_obj.config[PCI_COMMAND] & PCI_COMMAND_MASTER) &&
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,
[TPT] = mac_read_clr4, [TPR] = 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) };
enum { MAC_ACCESS_PARTIAL = 1, MAC_ACCESS_FLAG_NEEDED = 2 };
#define markflag(x) ((E1000_FLAG_##x << 2) | MAC_ACCESS_FLAG_NEEDED)
/* In the array below the meaning of the bits is: [f|f|f|f|f|f|n|p]
* f - flag bits (up to 6 possible flags)
* n - flag needed
* p - partially implenented */
static const uint8_t mac_reg_access[0x8000] = {
[RDTR] = markflag(MIT), [TADV] = markflag(MIT),
[RADV] = markflag(MIT), [ITR] = markflag(MIT),
};
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]) {
if (!(mac_reg_access[index] & MAC_ACCESS_FLAG_NEEDED)
|| (s->compat_flags & (mac_reg_access[index] >> 2))) {
if (mac_reg_access[index] & MAC_ACCESS_PARTIAL) {
DBGOUT(GENERAL, "Writing to register at offset: 0x%08x. "
"It is not fully implemented.\n", index<<2);
}
macreg_writeops[index](s, index, val);
} else { /* "flag needed" bit is set, but the flag is not active */
DBGOUT(MMIO, "MMIO write attempt to disabled reg. addr=0x%08x\n",
index<<2);
}
} 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]) {
if (!(mac_reg_access[index] & MAC_ACCESS_FLAG_NEEDED)
|| (s->compat_flags & (mac_reg_access[index] >> 2))) {
if (mac_reg_access[index] & MAC_ACCESS_PARTIAL) {
DBGOUT(GENERAL, "Reading register at offset: 0x%08x. "
"It is not fully implemented.\n", index<<2);
}
return macreg_readops[index](s, index);
} else { /* "flag needed" bit is set, but the flag is not active */
DBGOUT(MMIO, "MMIO read attempt of disabled reg. addr=0x%08x\n",
index<<2);
}
} else {
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 (!chkflag(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 chkflag(MIT);
}
static bool e1000_full_mac_needed(void *opaque)
{
E1000State *s = opaque;
return chkflag(MAC);
}
static const VMStateDescription vmstate_e1000_mit_state = {
.name = "e1000/mit_state",
.version_id = 1,
.minimum_version_id = 1,
.needed = e1000_mit_state_needed,
.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_full_mac_state = {
.name = "e1000/full_mac_state",
.version_id = 1,
.minimum_version_id = 1,
.needed = e1000_full_mac_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT32_ARRAY(mac_reg, E1000State, 0x8000),
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 = (const VMStateDescription*[]) {
&vmstate_e1000_mit_state,
&vmstate_e1000_full_mac_state,
NULL
}
};
/*
* 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
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);
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,
.link_status_changed = e1000_set_link_status,
};
static void e1000_write_config(PCIDevice *pci_dev, uint32_t address,
uint32_t val, int len)
{
E1000State *s = E1000(pci_dev);
pci_default_write_config(pci_dev, address, val, len);
if (range_covers_byte(address, len, PCI_COMMAND) &&
(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
qemu_flush_queued_packets(qemu_get_queue(s->nic));
}
}
static void pci_e1000_realize(PCIDevice *pci_dev, Error **errp)
{
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_dev->config_write = e1000_write_config;
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);
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);
}
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->realize = pci_e1000_realize;
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 void e1000_instance_init(Object *obj)
{
E1000State *n = E1000(obj);
device_add_bootindex_property(obj, &n->conf.bootindex,
"bootindex", "/ethernet-phy@0",
DEVICE(n), NULL);
}
static const TypeInfo e1000_base_info = {
.name = TYPE_E1000_BASE,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(E1000State),
.instance_init = e1000_instance_init,
.class_size = sizeof(E1000BaseClass),
.abstract = true,
};
static const E1000Info e1000_devices[] = {
{
.name = "e1000",
.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 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_info.instance_init = e1000_instance_init;
type_register(&type_info);
}
}
type_init(e1000_register_types)
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