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qemu-e2k/hw/net/e1000e_core.c
Kevin Wolf c89d416a2b e1000e: Don't zero out buffer address in rx descriptor 
The e1000e emulation zeroes out any used rx descriptor and then writes a
completely newly constructed value there. By doing this, it doesn't only
update the write-back area of the descriptors (as it's supposed to do),
but it also clears the buffer address, which real hardware doesn't do.

The spec explicitly mentions in chapter 7.1.8 that it is valid for a
driver to reuse a descriptor and only update the status field while
doing so, i.e. reusing the old buffer address:

    If software statically allocates buffers, and uses memory read to
    check for completed descriptors, it simply has to zero the status
    byte in the descriptor to make it ready for reuse by hardware.

This patch fixes the behaviour to leave the buffer address in
descriptors unchanged even after the descriptor has been used.

Signed-off-by: Kevin Wolf <mail@kevin-wolf.de>
Reviewed-by: Dmitry Fleytman <dmitry@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
2016-10-26 09:57:59 +08:00

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/*
* Core code for QEMU e1000e emulation
*
* Software developer's manuals:
* http://www.intel.com/content/dam/doc/datasheet/82574l-gbe-controller-datasheet.pdf
*
* Copyright (c) 2015 Ravello Systems LTD (http://ravellosystems.com)
* Developed by Daynix Computing LTD (http://www.daynix.com)
*
* Authors:
* Dmitry Fleytman <dmitry@daynix.com>
* Leonid Bloch <leonid@daynix.com>
* Yan Vugenfirer <yan@daynix.com>
*
* Based on work done by:
* 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 "qemu/osdep.h"
#include "sysemu/sysemu.h"
#include "net/net.h"
#include "net/tap.h"
#include "hw/pci/msi.h"
#include "hw/pci/msix.h"
#include "net_tx_pkt.h"
#include "net_rx_pkt.h"
#include "e1000x_common.h"
#include "e1000e_core.h"
#include "trace.h"
#define E1000E_MIN_XITR (500) /* No more then 7813 interrupts per
second according to spec 10.2.4.2 */
#define E1000E_MAX_TX_FRAGS (64)
static inline void
e1000e_set_interrupt_cause(E1000ECore *core, uint32_t val);
static inline void
e1000e_process_ts_option(E1000ECore *core, struct e1000_tx_desc *dp)
{
if (le32_to_cpu(dp->upper.data) & E1000_TXD_EXTCMD_TSTAMP) {
trace_e1000e_wrn_no_ts_support();
}
}
static inline void
e1000e_process_snap_option(E1000ECore *core, uint32_t cmd_and_length)
{
if (cmd_and_length & E1000_TXD_CMD_SNAP) {
trace_e1000e_wrn_no_snap_support();
}
}
static inline void
e1000e_raise_legacy_irq(E1000ECore *core)
{
trace_e1000e_irq_legacy_notify(true);
e1000x_inc_reg_if_not_full(core->mac, IAC);
pci_set_irq(core->owner, 1);
}
static inline void
e1000e_lower_legacy_irq(E1000ECore *core)
{
trace_e1000e_irq_legacy_notify(false);
pci_set_irq(core->owner, 0);
}
static inline void
e1000e_intrmgr_rearm_timer(E1000IntrDelayTimer *timer)
{
int64_t delay_ns = (int64_t) timer->core->mac[timer->delay_reg] *
timer->delay_resolution_ns;
trace_e1000e_irq_rearm_timer(timer->delay_reg << 2, delay_ns);
timer_mod(timer->timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + delay_ns);
timer->running = true;
}
static void
e1000e_intmgr_timer_resume(E1000IntrDelayTimer *timer)
{
if (timer->running) {
e1000e_intrmgr_rearm_timer(timer);
}
}
static void
e1000e_intmgr_timer_pause(E1000IntrDelayTimer *timer)
{
if (timer->running) {
timer_del(timer->timer);
}
}
static inline void
e1000e_intrmgr_stop_timer(E1000IntrDelayTimer *timer)
{
if (timer->running) {
timer_del(timer->timer);
timer->running = false;
}
}
static inline void
e1000e_intrmgr_fire_delayed_interrupts(E1000ECore *core)
{
trace_e1000e_irq_fire_delayed_interrupts();
e1000e_set_interrupt_cause(core, 0);
}
static void
e1000e_intrmgr_on_timer(void *opaque)
{
E1000IntrDelayTimer *timer = opaque;
trace_e1000e_irq_throttling_timer(timer->delay_reg << 2);
timer->running = false;
e1000e_intrmgr_fire_delayed_interrupts(timer->core);
}
static void
e1000e_intrmgr_on_throttling_timer(void *opaque)
{
E1000IntrDelayTimer *timer = opaque;
assert(!msix_enabled(timer->core->owner));
timer->running = false;
if (!timer->core->itr_intr_pending) {
trace_e1000e_irq_throttling_no_pending_interrupts();
return;
}
if (msi_enabled(timer->core->owner)) {
trace_e1000e_irq_msi_notify_postponed();
e1000e_set_interrupt_cause(timer->core, 0);
} else {
trace_e1000e_irq_legacy_notify_postponed();
e1000e_set_interrupt_cause(timer->core, 0);
}
}
static void
e1000e_intrmgr_on_msix_throttling_timer(void *opaque)
{
E1000IntrDelayTimer *timer = opaque;
int idx = timer - &timer->core->eitr[0];
assert(msix_enabled(timer->core->owner));
timer->running = false;
if (!timer->core->eitr_intr_pending[idx]) {
trace_e1000e_irq_throttling_no_pending_vec(idx);
return;
}
trace_e1000e_irq_msix_notify_postponed_vec(idx);
msix_notify(timer->core->owner, idx);
}
static void
e1000e_intrmgr_initialize_all_timers(E1000ECore *core, bool create)
{
int i;
core->radv.delay_reg = RADV;
core->rdtr.delay_reg = RDTR;
core->raid.delay_reg = RAID;
core->tadv.delay_reg = TADV;
core->tidv.delay_reg = TIDV;
core->radv.delay_resolution_ns = E1000_INTR_DELAY_NS_RES;
core->rdtr.delay_resolution_ns = E1000_INTR_DELAY_NS_RES;
core->raid.delay_resolution_ns = E1000_INTR_DELAY_NS_RES;
core->tadv.delay_resolution_ns = E1000_INTR_DELAY_NS_RES;
core->tidv.delay_resolution_ns = E1000_INTR_DELAY_NS_RES;
core->radv.core = core;
core->rdtr.core = core;
core->raid.core = core;
core->tadv.core = core;
core->tidv.core = core;
core->itr.core = core;
core->itr.delay_reg = ITR;
core->itr.delay_resolution_ns = E1000_INTR_THROTTLING_NS_RES;
for (i = 0; i < E1000E_MSIX_VEC_NUM; i++) {
core->eitr[i].core = core;
core->eitr[i].delay_reg = EITR + i;
core->eitr[i].delay_resolution_ns = E1000_INTR_THROTTLING_NS_RES;
}
if (!create) {
return;
}
core->radv.timer =
timer_new_ns(QEMU_CLOCK_VIRTUAL, e1000e_intrmgr_on_timer, &core->radv);
core->rdtr.timer =
timer_new_ns(QEMU_CLOCK_VIRTUAL, e1000e_intrmgr_on_timer, &core->rdtr);
core->raid.timer =
timer_new_ns(QEMU_CLOCK_VIRTUAL, e1000e_intrmgr_on_timer, &core->raid);
core->tadv.timer =
timer_new_ns(QEMU_CLOCK_VIRTUAL, e1000e_intrmgr_on_timer, &core->tadv);
core->tidv.timer =
timer_new_ns(QEMU_CLOCK_VIRTUAL, e1000e_intrmgr_on_timer, &core->tidv);
core->itr.timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
e1000e_intrmgr_on_throttling_timer,
&core->itr);
for (i = 0; i < E1000E_MSIX_VEC_NUM; i++) {
core->eitr[i].timer =
timer_new_ns(QEMU_CLOCK_VIRTUAL,
e1000e_intrmgr_on_msix_throttling_timer,
&core->eitr[i]);
}
}
static inline void
e1000e_intrmgr_stop_delay_timers(E1000ECore *core)
{
e1000e_intrmgr_stop_timer(&core->radv);
e1000e_intrmgr_stop_timer(&core->rdtr);
e1000e_intrmgr_stop_timer(&core->raid);
e1000e_intrmgr_stop_timer(&core->tidv);
e1000e_intrmgr_stop_timer(&core->tadv);
}
static bool
e1000e_intrmgr_delay_rx_causes(E1000ECore *core, uint32_t *causes)
{
uint32_t delayable_causes;
uint32_t rdtr = core->mac[RDTR];
uint32_t radv = core->mac[RADV];
uint32_t raid = core->mac[RAID];
if (msix_enabled(core->owner)) {
return false;
}
delayable_causes = E1000_ICR_RXQ0 |
E1000_ICR_RXQ1 |
E1000_ICR_RXT0;
if (!(core->mac[RFCTL] & E1000_RFCTL_ACK_DIS)) {
delayable_causes |= E1000_ICR_ACK;
}
/* Clean up all causes that may be delayed */
core->delayed_causes |= *causes & delayable_causes;
*causes &= ~delayable_causes;
/* Check if delayed RX interrupts disabled by client
or if there are causes that cannot be delayed */
if ((rdtr == 0) || (*causes != 0)) {
return false;
}
/* Check if delayed RX ACK interrupts disabled by client
and there is an ACK packet received */
if ((raid == 0) && (core->delayed_causes & E1000_ICR_ACK)) {
return false;
}
/* All causes delayed */
e1000e_intrmgr_rearm_timer(&core->rdtr);
if (!core->radv.running && (radv != 0)) {
e1000e_intrmgr_rearm_timer(&core->radv);
}
if (!core->raid.running && (core->delayed_causes & E1000_ICR_ACK)) {
e1000e_intrmgr_rearm_timer(&core->raid);
}
return true;
}
static bool
e1000e_intrmgr_delay_tx_causes(E1000ECore *core, uint32_t *causes)
{
static const uint32_t delayable_causes = E1000_ICR_TXQ0 |
E1000_ICR_TXQ1 |
E1000_ICR_TXQE |
E1000_ICR_TXDW;
if (msix_enabled(core->owner)) {
return false;
}
/* Clean up all causes that may be delayed */
core->delayed_causes |= *causes & delayable_causes;
*causes &= ~delayable_causes;
/* If there are causes that cannot be delayed */
if (*causes != 0) {
return false;
}
/* All causes delayed */
e1000e_intrmgr_rearm_timer(&core->tidv);
if (!core->tadv.running && (core->mac[TADV] != 0)) {
e1000e_intrmgr_rearm_timer(&core->tadv);
}
return true;
}
static uint32_t
e1000e_intmgr_collect_delayed_causes(E1000ECore *core)
{
uint32_t res;
if (msix_enabled(core->owner)) {
assert(core->delayed_causes == 0);
return 0;
}
res = core->delayed_causes;
core->delayed_causes = 0;
e1000e_intrmgr_stop_delay_timers(core);
return res;
}
static void
e1000e_intrmgr_fire_all_timers(E1000ECore *core)
{
int i;
uint32_t val = e1000e_intmgr_collect_delayed_causes(core);
trace_e1000e_irq_adding_delayed_causes(val, core->mac[ICR]);
core->mac[ICR] |= val;
if (core->itr.running) {
timer_del(core->itr.timer);
e1000e_intrmgr_on_throttling_timer(&core->itr);
}
for (i = 0; i < E1000E_MSIX_VEC_NUM; i++) {
if (core->eitr[i].running) {
timer_del(core->eitr[i].timer);
e1000e_intrmgr_on_msix_throttling_timer(&core->eitr[i]);
}
}
}
static void
e1000e_intrmgr_resume(E1000ECore *core)
{
int i;
e1000e_intmgr_timer_resume(&core->radv);
e1000e_intmgr_timer_resume(&core->rdtr);
e1000e_intmgr_timer_resume(&core->raid);
e1000e_intmgr_timer_resume(&core->tidv);
e1000e_intmgr_timer_resume(&core->tadv);
e1000e_intmgr_timer_resume(&core->itr);
for (i = 0; i < E1000E_MSIX_VEC_NUM; i++) {
e1000e_intmgr_timer_resume(&core->eitr[i]);
}
}
static void
e1000e_intrmgr_pause(E1000ECore *core)
{
int i;
e1000e_intmgr_timer_pause(&core->radv);
e1000e_intmgr_timer_pause(&core->rdtr);
e1000e_intmgr_timer_pause(&core->raid);
e1000e_intmgr_timer_pause(&core->tidv);
e1000e_intmgr_timer_pause(&core->tadv);
e1000e_intmgr_timer_pause(&core->itr);
for (i = 0; i < E1000E_MSIX_VEC_NUM; i++) {
e1000e_intmgr_timer_pause(&core->eitr[i]);
}
}
static void
e1000e_intrmgr_reset(E1000ECore *core)
{
int i;
core->delayed_causes = 0;
e1000e_intrmgr_stop_delay_timers(core);
e1000e_intrmgr_stop_timer(&core->itr);
for (i = 0; i < E1000E_MSIX_VEC_NUM; i++) {
e1000e_intrmgr_stop_timer(&core->eitr[i]);
}
}
static void
e1000e_intrmgr_pci_unint(E1000ECore *core)
{
int i;
timer_del(core->radv.timer);
timer_free(core->radv.timer);
timer_del(core->rdtr.timer);
timer_free(core->rdtr.timer);
timer_del(core->raid.timer);
timer_free(core->raid.timer);
timer_del(core->tadv.timer);
timer_free(core->tadv.timer);
timer_del(core->tidv.timer);
timer_free(core->tidv.timer);
timer_del(core->itr.timer);
timer_free(core->itr.timer);
for (i = 0; i < E1000E_MSIX_VEC_NUM; i++) {
timer_del(core->eitr[i].timer);
timer_free(core->eitr[i].timer);
}
}
static void
e1000e_intrmgr_pci_realize(E1000ECore *core)
{
e1000e_intrmgr_initialize_all_timers(core, true);
}
static inline bool
e1000e_rx_csum_enabled(E1000ECore *core)
{
return (core->mac[RXCSUM] & E1000_RXCSUM_PCSD) ? false : true;
}
static inline bool
e1000e_rx_use_legacy_descriptor(E1000ECore *core)
{
return (core->mac[RFCTL] & E1000_RFCTL_EXTEN) ? false : true;
}
static inline bool
e1000e_rx_use_ps_descriptor(E1000ECore *core)
{
return !e1000e_rx_use_legacy_descriptor(core) &&
(core->mac[RCTL] & E1000_RCTL_DTYP_PS);
}
static inline bool
e1000e_rss_enabled(E1000ECore *core)
{
return E1000_MRQC_ENABLED(core->mac[MRQC]) &&
!e1000e_rx_csum_enabled(core) &&
!e1000e_rx_use_legacy_descriptor(core);
}
typedef struct E1000E_RSSInfo_st {
bool enabled;
uint32_t hash;
uint32_t queue;
uint32_t type;
} E1000E_RSSInfo;
static uint32_t
e1000e_rss_get_hash_type(E1000ECore *core, struct NetRxPkt *pkt)
{
bool isip4, isip6, isudp, istcp;
assert(e1000e_rss_enabled(core));
net_rx_pkt_get_protocols(pkt, &isip4, &isip6, &isudp, &istcp);
if (isip4) {
bool fragment = net_rx_pkt_get_ip4_info(pkt)->fragment;
trace_e1000e_rx_rss_ip4(fragment, istcp, core->mac[MRQC],
E1000_MRQC_EN_TCPIPV4(core->mac[MRQC]),
E1000_MRQC_EN_IPV4(core->mac[MRQC]));
if (!fragment && istcp && E1000_MRQC_EN_TCPIPV4(core->mac[MRQC])) {
return E1000_MRQ_RSS_TYPE_IPV4TCP;
}
if (E1000_MRQC_EN_IPV4(core->mac[MRQC])) {
return E1000_MRQ_RSS_TYPE_IPV4;
}
} else if (isip6) {
eth_ip6_hdr_info *ip6info = net_rx_pkt_get_ip6_info(pkt);
bool ex_dis = core->mac[RFCTL] & E1000_RFCTL_IPV6_EX_DIS;
bool new_ex_dis = core->mac[RFCTL] & E1000_RFCTL_NEW_IPV6_EXT_DIS;
/*
* Following two traces must not be combined because resulting
* event will have 11 arguments totally and some trace backends
* (at least "ust") have limitation of maximum 10 arguments per
* event. Events with more arguments fail to compile for
* backends like these.
*/
trace_e1000e_rx_rss_ip6_rfctl(core->mac[RFCTL]);
trace_e1000e_rx_rss_ip6(ex_dis, new_ex_dis, istcp,
ip6info->has_ext_hdrs,
ip6info->rss_ex_dst_valid,
ip6info->rss_ex_src_valid,
core->mac[MRQC],
E1000_MRQC_EN_TCPIPV6(core->mac[MRQC]),
E1000_MRQC_EN_IPV6EX(core->mac[MRQC]),
E1000_MRQC_EN_IPV6(core->mac[MRQC]));
if ((!ex_dis || !ip6info->has_ext_hdrs) &&
(!new_ex_dis || !(ip6info->rss_ex_dst_valid ||
ip6info->rss_ex_src_valid))) {
if (istcp && !ip6info->fragment &&
E1000_MRQC_EN_TCPIPV6(core->mac[MRQC])) {
return E1000_MRQ_RSS_TYPE_IPV6TCP;
}
if (E1000_MRQC_EN_IPV6EX(core->mac[MRQC])) {
return E1000_MRQ_RSS_TYPE_IPV6EX;
}
}
if (E1000_MRQC_EN_IPV6(core->mac[MRQC])) {
return E1000_MRQ_RSS_TYPE_IPV6;
}
}
return E1000_MRQ_RSS_TYPE_NONE;
}
static uint32_t
e1000e_rss_calc_hash(E1000ECore *core,
struct NetRxPkt *pkt,
E1000E_RSSInfo *info)
{
NetRxPktRssType type;
assert(e1000e_rss_enabled(core));
switch (info->type) {
case E1000_MRQ_RSS_TYPE_IPV4:
type = NetPktRssIpV4;
break;
case E1000_MRQ_RSS_TYPE_IPV4TCP:
type = NetPktRssIpV4Tcp;
break;
case E1000_MRQ_RSS_TYPE_IPV6TCP:
type = NetPktRssIpV6Tcp;
break;
case E1000_MRQ_RSS_TYPE_IPV6:
type = NetPktRssIpV6;
break;
case E1000_MRQ_RSS_TYPE_IPV6EX:
type = NetPktRssIpV6Ex;
break;
default:
assert(false);
return 0;
}
return net_rx_pkt_calc_rss_hash(pkt, type, (uint8_t *) &core->mac[RSSRK]);
}
static void
e1000e_rss_parse_packet(E1000ECore *core,
struct NetRxPkt *pkt,
E1000E_RSSInfo *info)
{
trace_e1000e_rx_rss_started();
if (!e1000e_rss_enabled(core)) {
info->enabled = false;
info->hash = 0;
info->queue = 0;
info->type = 0;
trace_e1000e_rx_rss_disabled();
return;
}
info->enabled = true;
info->type = e1000e_rss_get_hash_type(core, pkt);
trace_e1000e_rx_rss_type(info->type);
if (info->type == E1000_MRQ_RSS_TYPE_NONE) {
info->hash = 0;
info->queue = 0;
return;
}
info->hash = e1000e_rss_calc_hash(core, pkt, info);
info->queue = E1000_RSS_QUEUE(&core->mac[RETA], info->hash);
}
static void
e1000e_setup_tx_offloads(E1000ECore *core, struct e1000e_tx *tx)
{
if (tx->props.tse && tx->props.cptse) {
net_tx_pkt_build_vheader(tx->tx_pkt, true, true, tx->props.mss);
net_tx_pkt_update_ip_checksums(tx->tx_pkt);
e1000x_inc_reg_if_not_full(core->mac, TSCTC);
return;
}
if (tx->props.sum_needed & E1000_TXD_POPTS_TXSM) {
net_tx_pkt_build_vheader(tx->tx_pkt, false, true, 0);
}
if (tx->props.sum_needed & E1000_TXD_POPTS_IXSM) {
net_tx_pkt_update_ip_hdr_checksum(tx->tx_pkt);
}
}
static bool
e1000e_tx_pkt_send(E1000ECore *core, struct e1000e_tx *tx, int queue_index)
{
int target_queue = MIN(core->max_queue_num, queue_index);
NetClientState *queue = qemu_get_subqueue(core->owner_nic, target_queue);
e1000e_setup_tx_offloads(core, tx);
net_tx_pkt_dump(tx->tx_pkt);
if ((core->phy[0][PHY_CTRL] & MII_CR_LOOPBACK) ||
((core->mac[RCTL] & E1000_RCTL_LBM_MAC) == E1000_RCTL_LBM_MAC)) {
return net_tx_pkt_send_loopback(tx->tx_pkt, queue);
} else {
return net_tx_pkt_send(tx->tx_pkt, queue);
}
}
static void
e1000e_on_tx_done_update_stats(E1000ECore *core, struct NetTxPkt *tx_pkt)
{
static const int PTCregs[6] = { PTC64, PTC127, PTC255, PTC511,
PTC1023, PTC1522 };
size_t tot_len = net_tx_pkt_get_total_len(tx_pkt);
e1000x_increase_size_stats(core->mac, PTCregs, tot_len);
e1000x_inc_reg_if_not_full(core->mac, TPT);
e1000x_grow_8reg_if_not_full(core->mac, TOTL, tot_len);
switch (net_tx_pkt_get_packet_type(tx_pkt)) {
case ETH_PKT_BCAST:
e1000x_inc_reg_if_not_full(core->mac, BPTC);
break;
case ETH_PKT_MCAST:
e1000x_inc_reg_if_not_full(core->mac, MPTC);
break;
case ETH_PKT_UCAST:
break;
default:
g_assert_not_reached();
}
core->mac[GPTC] = core->mac[TPT];
core->mac[GOTCL] = core->mac[TOTL];
core->mac[GOTCH] = core->mac[TOTH];
}
static void
e1000e_process_tx_desc(E1000ECore *core,
struct e1000e_tx *tx,
struct e1000_tx_desc *dp,
int queue_index)
{
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;
uint64_t addr;
struct e1000_context_desc *xp = (struct e1000_context_desc *)dp;
bool eop = txd_lower & E1000_TXD_CMD_EOP;
if (dtype == E1000_TXD_CMD_DEXT) { /* context descriptor */
e1000x_read_tx_ctx_descr(xp, &tx->props);
e1000e_process_snap_option(core, le32_to_cpu(xp->cmd_and_length));
return;
} else if (dtype == (E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D)) {
/* data descriptor */
tx->props.sum_needed = le32_to_cpu(dp->upper.data) >> 8;
tx->props.cptse = (txd_lower & E1000_TXD_CMD_TSE) ? 1 : 0;
e1000e_process_ts_option(core, dp);
} else {
/* legacy descriptor */
e1000e_process_ts_option(core, dp);
tx->props.cptse = 0;
}
addr = le64_to_cpu(dp->buffer_addr);
if (!tx->skip_cp) {
if (!net_tx_pkt_add_raw_fragment(tx->tx_pkt, addr, split_size)) {
tx->skip_cp = true;
}
}
if (eop) {
if (!tx->skip_cp && net_tx_pkt_parse(tx->tx_pkt)) {
if (e1000x_vlan_enabled(core->mac) &&
e1000x_is_vlan_txd(txd_lower)) {
net_tx_pkt_setup_vlan_header_ex(tx->tx_pkt,
le16_to_cpu(dp->upper.fields.special), core->vet);
}
if (e1000e_tx_pkt_send(core, tx, queue_index)) {
e1000e_on_tx_done_update_stats(core, tx->tx_pkt);
}
}
tx->skip_cp = false;
net_tx_pkt_reset(tx->tx_pkt);
tx->props.sum_needed = 0;
tx->props.cptse = 0;
}
}
static inline uint32_t
e1000e_tx_wb_interrupt_cause(E1000ECore *core, int queue_idx)
{
if (!msix_enabled(core->owner)) {
return E1000_ICR_TXDW;
}
return (queue_idx == 0) ? E1000_ICR_TXQ0 : E1000_ICR_TXQ1;
}
static inline uint32_t
e1000e_rx_wb_interrupt_cause(E1000ECore *core, int queue_idx,
bool min_threshold_hit)
{
if (!msix_enabled(core->owner)) {
return E1000_ICS_RXT0 | (min_threshold_hit ? E1000_ICS_RXDMT0 : 0);
}
return (queue_idx == 0) ? E1000_ICR_RXQ0 : E1000_ICR_RXQ1;
}
static uint32_t
e1000e_txdesc_writeback(E1000ECore *core, dma_addr_t base,
struct e1000_tx_desc *dp, bool *ide, int queue_idx)
{
uint32_t txd_upper, txd_lower = le32_to_cpu(dp->lower.data);
if (!(txd_lower & E1000_TXD_CMD_RS) &&
!(core->mac[IVAR] & E1000_IVAR_TX_INT_EVERY_WB)) {
return 0;
}
*ide = (txd_lower & E1000_TXD_CMD_IDE) ? true : false;
txd_upper = le32_to_cpu(dp->upper.data) | E1000_TXD_STAT_DD;
dp->upper.data = cpu_to_le32(txd_upper);
pci_dma_write(core->owner, base + ((char *)&dp->upper - (char *)dp),
&dp->upper, sizeof(dp->upper));
return e1000e_tx_wb_interrupt_cause(core, queue_idx);
}
typedef struct E1000E_RingInfo_st {
int dbah;
int dbal;
int dlen;
int dh;
int dt;
int idx;
} E1000E_RingInfo;
static inline bool
e1000e_ring_empty(E1000ECore *core, const E1000E_RingInfo *r)
{
return core->mac[r->dh] == core->mac[r->dt];
}
static inline uint64_t
e1000e_ring_base(E1000ECore *core, const E1000E_RingInfo *r)
{
uint64_t bah = core->mac[r->dbah];
uint64_t bal = core->mac[r->dbal];
return (bah << 32) + bal;
}
static inline uint64_t
e1000e_ring_head_descr(E1000ECore *core, const E1000E_RingInfo *r)
{
return e1000e_ring_base(core, r) + E1000_RING_DESC_LEN * core->mac[r->dh];
}
static inline void
e1000e_ring_advance(E1000ECore *core, const E1000E_RingInfo *r, uint32_t count)
{
core->mac[r->dh] += count;
if (core->mac[r->dh] * E1000_RING_DESC_LEN >= core->mac[r->dlen]) {
core->mac[r->dh] = 0;
}
}
static inline uint32_t
e1000e_ring_free_descr_num(E1000ECore *core, const E1000E_RingInfo *r)
{
trace_e1000e_ring_free_space(r->idx, core->mac[r->dlen],
core->mac[r->dh], core->mac[r->dt]);
if (core->mac[r->dh] <= core->mac[r->dt]) {
return core->mac[r->dt] - core->mac[r->dh];
}
if (core->mac[r->dh] > core->mac[r->dt]) {
return core->mac[r->dlen] / E1000_RING_DESC_LEN +
core->mac[r->dt] - core->mac[r->dh];
}
g_assert_not_reached();
return 0;
}
static inline bool
e1000e_ring_enabled(E1000ECore *core, const E1000E_RingInfo *r)
{
return core->mac[r->dlen] > 0;
}
static inline uint32_t
e1000e_ring_len(E1000ECore *core, const E1000E_RingInfo *r)
{
return core->mac[r->dlen];
}
typedef struct E1000E_TxRing_st {
const E1000E_RingInfo *i;
struct e1000e_tx *tx;
} E1000E_TxRing;
static inline int
e1000e_mq_queue_idx(int base_reg_idx, int reg_idx)
{
return (reg_idx - base_reg_idx) / (0x100 >> 2);
}
static inline void
e1000e_tx_ring_init(E1000ECore *core, E1000E_TxRing *txr, int idx)
{
static const E1000E_RingInfo i[E1000E_NUM_QUEUES] = {
{ TDBAH, TDBAL, TDLEN, TDH, TDT, 0 },
{ TDBAH1, TDBAL1, TDLEN1, TDH1, TDT1, 1 }
};
assert(idx < ARRAY_SIZE(i));
txr->i = &i[idx];
txr->tx = &core->tx[idx];
}
typedef struct E1000E_RxRing_st {
const E1000E_RingInfo *i;
} E1000E_RxRing;
static inline void
e1000e_rx_ring_init(E1000ECore *core, E1000E_RxRing *rxr, int idx)
{
static const E1000E_RingInfo i[E1000E_NUM_QUEUES] = {
{ RDBAH0, RDBAL0, RDLEN0, RDH0, RDT0, 0 },
{ RDBAH1, RDBAL1, RDLEN1, RDH1, RDT1, 1 }
};
assert(idx < ARRAY_SIZE(i));
rxr->i = &i[idx];
}
static void
e1000e_start_xmit(E1000ECore *core, const E1000E_TxRing *txr)
{
dma_addr_t base;
struct e1000_tx_desc desc;
bool ide = false;
const E1000E_RingInfo *txi = txr->i;
uint32_t cause = E1000_ICS_TXQE;
if (!(core->mac[TCTL] & E1000_TCTL_EN)) {
trace_e1000e_tx_disabled();
return;
}
while (!e1000e_ring_empty(core, txi)) {
base = e1000e_ring_head_descr(core, txi);
pci_dma_read(core->owner, base, &desc, sizeof(desc));
trace_e1000e_tx_descr((void *)(intptr_t)desc.buffer_addr,
desc.lower.data, desc.upper.data);
e1000e_process_tx_desc(core, txr->tx, &desc, txi->idx);
cause |= e1000e_txdesc_writeback(core, base, &desc, &ide, txi->idx);
e1000e_ring_advance(core, txi, 1);
}
if (!ide || !e1000e_intrmgr_delay_tx_causes(core, &cause)) {
e1000e_set_interrupt_cause(core, cause);
}
}
static bool
e1000e_has_rxbufs(E1000ECore *core, const E1000E_RingInfo *r,
size_t total_size)
{
uint32_t bufs = e1000e_ring_free_descr_num(core, r);
trace_e1000e_rx_has_buffers(r->idx, bufs, total_size,
core->rx_desc_buf_size);
return total_size <= bufs / (core->rx_desc_len / E1000_MIN_RX_DESC_LEN) *
core->rx_desc_buf_size;
}
void
e1000e_start_recv(E1000ECore *core)
{
int i;
trace_e1000e_rx_start_recv();
for (i = 0; i <= core->max_queue_num; i++) {
qemu_flush_queued_packets(qemu_get_subqueue(core->owner_nic, i));
}
}
int
e1000e_can_receive(E1000ECore *core)
{
int i;
if (!e1000x_rx_ready(core->owner, core->mac)) {
return false;
}
for (i = 0; i < E1000E_NUM_QUEUES; i++) {
E1000E_RxRing rxr;
e1000e_rx_ring_init(core, &rxr, i);
if (e1000e_ring_enabled(core, rxr.i) &&
e1000e_has_rxbufs(core, rxr.i, 1)) {
trace_e1000e_rx_can_recv();
return true;
}
}
trace_e1000e_rx_can_recv_rings_full();
return false;
}
ssize_t
e1000e_receive(E1000ECore *core, const uint8_t *buf, size_t size)
{
const struct iovec iov = {
.iov_base = (uint8_t *)buf,
.iov_len = size
};
return e1000e_receive_iov(core, &iov, 1);
}
static inline bool
e1000e_rx_l3_cso_enabled(E1000ECore *core)
{
return !!(core->mac[RXCSUM] & E1000_RXCSUM_IPOFLD);
}
static inline bool
e1000e_rx_l4_cso_enabled(E1000ECore *core)
{
return !!(core->mac[RXCSUM] & E1000_RXCSUM_TUOFLD);
}
static bool
e1000e_receive_filter(E1000ECore *core, const uint8_t *buf, int size)
{
uint32_t rctl = core->mac[RCTL];
if (e1000x_is_vlan_packet(buf, core->vet) &&
e1000x_vlan_rx_filter_enabled(core->mac)) {
uint16_t vid = lduw_be_p(buf + 14);
uint32_t vfta = ldl_le_p((uint32_t *)(core->mac + VFTA) +
((vid >> 5) & 0x7f));
if ((vfta & (1 << (vid & 0x1f))) == 0) {
trace_e1000e_rx_flt_vlan_mismatch(vid);
return false;
} else {
trace_e1000e_rx_flt_vlan_match(vid);
}
}
switch (net_rx_pkt_get_packet_type(core->rx_pkt)) {
case ETH_PKT_UCAST:
if (rctl & E1000_RCTL_UPE) {
return true; /* promiscuous ucast */
}
break;
case ETH_PKT_BCAST:
if (rctl & E1000_RCTL_BAM) {
return true; /* broadcast enabled */
}
break;
case ETH_PKT_MCAST:
if (rctl & E1000_RCTL_MPE) {
return true; /* promiscuous mcast */
}
break;
default:
g_assert_not_reached();
}
return e1000x_rx_group_filter(core->mac, buf);
}
static inline void
e1000e_read_lgcy_rx_descr(E1000ECore *core, uint8_t *desc, hwaddr *buff_addr)
{
struct e1000_rx_desc *d = (struct e1000_rx_desc *) desc;
*buff_addr = le64_to_cpu(d->buffer_addr);
}
static inline void
e1000e_read_ext_rx_descr(E1000ECore *core, uint8_t *desc, hwaddr *buff_addr)
{
union e1000_rx_desc_extended *d = (union e1000_rx_desc_extended *) desc;
*buff_addr = le64_to_cpu(d->read.buffer_addr);
}
static inline void
e1000e_read_ps_rx_descr(E1000ECore *core, uint8_t *desc,
hwaddr (*buff_addr)[MAX_PS_BUFFERS])
{
int i;
union e1000_rx_desc_packet_split *d =
(union e1000_rx_desc_packet_split *) desc;
for (i = 0; i < MAX_PS_BUFFERS; i++) {
(*buff_addr)[i] = le64_to_cpu(d->read.buffer_addr[i]);
}
trace_e1000e_rx_desc_ps_read((*buff_addr)[0], (*buff_addr)[1],
(*buff_addr)[2], (*buff_addr)[3]);
}
static inline void
e1000e_read_rx_descr(E1000ECore *core, uint8_t *desc,
hwaddr (*buff_addr)[MAX_PS_BUFFERS])
{
if (e1000e_rx_use_legacy_descriptor(core)) {
e1000e_read_lgcy_rx_descr(core, desc, &(*buff_addr)[0]);
(*buff_addr)[1] = (*buff_addr)[2] = (*buff_addr)[3] = 0;
} else {
if (core->mac[RCTL] & E1000_RCTL_DTYP_PS) {
e1000e_read_ps_rx_descr(core, desc, buff_addr);
} else {
e1000e_read_ext_rx_descr(core, desc, &(*buff_addr)[0]);
(*buff_addr)[1] = (*buff_addr)[2] = (*buff_addr)[3] = 0;
}
}
}
static void
e1000e_verify_csum_in_sw(E1000ECore *core,
struct NetRxPkt *pkt,
uint32_t *status_flags,
bool istcp, bool isudp)
{
bool csum_valid;
uint32_t csum_error;
if (e1000e_rx_l3_cso_enabled(core)) {
if (!net_rx_pkt_validate_l3_csum(pkt, &csum_valid)) {
trace_e1000e_rx_metadata_l3_csum_validation_failed();
} else {
csum_error = csum_valid ? 0 : E1000_RXDEXT_STATERR_IPE;
*status_flags |= E1000_RXD_STAT_IPCS | csum_error;
}
} else {
trace_e1000e_rx_metadata_l3_cso_disabled();
}
if (!e1000e_rx_l4_cso_enabled(core)) {
trace_e1000e_rx_metadata_l4_cso_disabled();
return;
}
if (!net_rx_pkt_validate_l4_csum(pkt, &csum_valid)) {
trace_e1000e_rx_metadata_l4_csum_validation_failed();
return;
}
csum_error = csum_valid ? 0 : E1000_RXDEXT_STATERR_TCPE;
if (istcp) {
*status_flags |= E1000_RXD_STAT_TCPCS |
csum_error;
} else if (isudp) {
*status_flags |= E1000_RXD_STAT_TCPCS |
E1000_RXD_STAT_UDPCS |
csum_error;
}
}
static inline bool
e1000e_is_tcp_ack(E1000ECore *core, struct NetRxPkt *rx_pkt)
{
if (!net_rx_pkt_is_tcp_ack(rx_pkt)) {
return false;
}
if (core->mac[RFCTL] & E1000_RFCTL_ACK_DATA_DIS) {
return !net_rx_pkt_has_tcp_data(rx_pkt);
}
return true;
}
static void
e1000e_build_rx_metadata(E1000ECore *core,
struct NetRxPkt *pkt,
bool is_eop,
const E1000E_RSSInfo *rss_info,
uint32_t *rss, uint32_t *mrq,
uint32_t *status_flags,
uint16_t *ip_id,
uint16_t *vlan_tag)
{
struct virtio_net_hdr *vhdr;
bool isip4, isip6, istcp, isudp;
uint32_t pkt_type;
*status_flags = E1000_RXD_STAT_DD;
/* No additional metadata needed for non-EOP descriptors */
if (!is_eop) {
goto func_exit;
}
*status_flags |= E1000_RXD_STAT_EOP;
net_rx_pkt_get_protocols(pkt, &isip4, &isip6, &isudp, &istcp);
trace_e1000e_rx_metadata_protocols(isip4, isip6, isudp, istcp);
/* VLAN state */
if (net_rx_pkt_is_vlan_stripped(pkt)) {
*status_flags |= E1000_RXD_STAT_VP;
*vlan_tag = cpu_to_le16(net_rx_pkt_get_vlan_tag(pkt));
trace_e1000e_rx_metadata_vlan(*vlan_tag);
}
/* Packet parsing results */
if ((core->mac[RXCSUM] & E1000_RXCSUM_PCSD) != 0) {
if (rss_info->enabled) {
*rss = cpu_to_le32(rss_info->hash);
*mrq = cpu_to_le32(rss_info->type | (rss_info->queue << 8));
trace_e1000e_rx_metadata_rss(*rss, *mrq);
}
} else if (isip4) {
*status_flags |= E1000_RXD_STAT_IPIDV;
*ip_id = cpu_to_le16(net_rx_pkt_get_ip_id(pkt));
trace_e1000e_rx_metadata_ip_id(*ip_id);
}
if (istcp && e1000e_is_tcp_ack(core, pkt)) {
*status_flags |= E1000_RXD_STAT_ACK;
trace_e1000e_rx_metadata_ack();
}
if (isip6 && (core->mac[RFCTL] & E1000_RFCTL_IPV6_DIS)) {
trace_e1000e_rx_metadata_ipv6_filtering_disabled();
pkt_type = E1000_RXD_PKT_MAC;
} else if (istcp || isudp) {
pkt_type = isip4 ? E1000_RXD_PKT_IP4_XDP : E1000_RXD_PKT_IP6_XDP;
} else if (isip4 || isip6) {
pkt_type = isip4 ? E1000_RXD_PKT_IP4 : E1000_RXD_PKT_IP6;
} else {
pkt_type = E1000_RXD_PKT_MAC;
}
*status_flags |= E1000_RXD_PKT_TYPE(pkt_type);
trace_e1000e_rx_metadata_pkt_type(pkt_type);
/* RX CSO information */
if (isip6 && (core->mac[RFCTL] & E1000_RFCTL_IPV6_XSUM_DIS)) {
trace_e1000e_rx_metadata_ipv6_sum_disabled();
goto func_exit;
}
if (!net_rx_pkt_has_virt_hdr(pkt)) {
trace_e1000e_rx_metadata_no_virthdr();
e1000e_verify_csum_in_sw(core, pkt, status_flags, istcp, isudp);
goto func_exit;
}
vhdr = net_rx_pkt_get_vhdr(pkt);
if (!(vhdr->flags & VIRTIO_NET_HDR_F_DATA_VALID) &&
!(vhdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)) {
trace_e1000e_rx_metadata_virthdr_no_csum_info();
e1000e_verify_csum_in_sw(core, pkt, status_flags, istcp, isudp);
goto func_exit;
}
if (e1000e_rx_l3_cso_enabled(core)) {
*status_flags |= isip4 ? E1000_RXD_STAT_IPCS : 0;
} else {
trace_e1000e_rx_metadata_l3_cso_disabled();
}
if (e1000e_rx_l4_cso_enabled(core)) {
if (istcp) {
*status_flags |= E1000_RXD_STAT_TCPCS;
} else if (isudp) {
*status_flags |= E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS;
}
} else {
trace_e1000e_rx_metadata_l4_cso_disabled();
}
trace_e1000e_rx_metadata_status_flags(*status_flags);
func_exit:
*status_flags = cpu_to_le32(*status_flags);
}
static inline void
e1000e_write_lgcy_rx_descr(E1000ECore *core, uint8_t *desc,
struct NetRxPkt *pkt,
const E1000E_RSSInfo *rss_info,
uint16_t length)
{
uint32_t status_flags, rss, mrq;
uint16_t ip_id;
struct e1000_rx_desc *d = (struct e1000_rx_desc *) desc;
assert(!rss_info->enabled);
d->length = cpu_to_le16(length);
d->csum = 0;
e1000e_build_rx_metadata(core, pkt, pkt != NULL,
rss_info,
&rss, &mrq,
&status_flags, &ip_id,
&d->special);
d->errors = (uint8_t) (le32_to_cpu(status_flags) >> 24);
d->status = (uint8_t) le32_to_cpu(status_flags);
d->special = 0;
}
static inline void
e1000e_write_ext_rx_descr(E1000ECore *core, uint8_t *desc,
struct NetRxPkt *pkt,
const E1000E_RSSInfo *rss_info,
uint16_t length)
{
union e1000_rx_desc_extended *d = (union e1000_rx_desc_extended *) desc;
memset(&d->wb, 0, sizeof(d->wb));
d->wb.upper.length = cpu_to_le16(length);
e1000e_build_rx_metadata(core, pkt, pkt != NULL,
rss_info,
&d->wb.lower.hi_dword.rss,
&d->wb.lower.mrq,
&d->wb.upper.status_error,
&d->wb.lower.hi_dword.csum_ip.ip_id,
&d->wb.upper.vlan);
}
static inline void
e1000e_write_ps_rx_descr(E1000ECore *core, uint8_t *desc,
struct NetRxPkt *pkt,
const E1000E_RSSInfo *rss_info,
size_t ps_hdr_len,
uint16_t(*written)[MAX_PS_BUFFERS])
{
int i;
union e1000_rx_desc_packet_split *d =
(union e1000_rx_desc_packet_split *) desc;
memset(&d->wb, 0, sizeof(d->wb));
d->wb.middle.length0 = cpu_to_le16((*written)[0]);
for (i = 0; i < PS_PAGE_BUFFERS; i++) {
d->wb.upper.length[i] = cpu_to_le16((*written)[i + 1]);
}
e1000e_build_rx_metadata(core, pkt, pkt != NULL,
rss_info,
&d->wb.lower.hi_dword.rss,
&d->wb.lower.mrq,
&d->wb.middle.status_error,
&d->wb.lower.hi_dword.csum_ip.ip_id,
&d->wb.middle.vlan);
d->wb.upper.header_status =
cpu_to_le16(ps_hdr_len | (ps_hdr_len ? E1000_RXDPS_HDRSTAT_HDRSP : 0));
trace_e1000e_rx_desc_ps_write((*written)[0], (*written)[1],
(*written)[2], (*written)[3]);
}
static inline void
e1000e_write_rx_descr(E1000ECore *core, uint8_t *desc,
struct NetRxPkt *pkt, const E1000E_RSSInfo *rss_info,
size_t ps_hdr_len, uint16_t(*written)[MAX_PS_BUFFERS])
{
if (e1000e_rx_use_legacy_descriptor(core)) {
assert(ps_hdr_len == 0);
e1000e_write_lgcy_rx_descr(core, desc, pkt, rss_info, (*written)[0]);
} else {
if (core->mac[RCTL] & E1000_RCTL_DTYP_PS) {
e1000e_write_ps_rx_descr(core, desc, pkt, rss_info,
ps_hdr_len, written);
} else {
assert(ps_hdr_len == 0);
e1000e_write_ext_rx_descr(core, desc, pkt, rss_info,
(*written)[0]);
}
}
}
typedef struct e1000e_ba_state_st {
uint16_t written[MAX_PS_BUFFERS];
uint8_t cur_idx;
} e1000e_ba_state;
static inline void
e1000e_write_hdr_to_rx_buffers(E1000ECore *core,
hwaddr (*ba)[MAX_PS_BUFFERS],
e1000e_ba_state *bastate,
const char *data,
dma_addr_t data_len)
{
assert(data_len <= core->rxbuf_sizes[0] - bastate->written[0]);
pci_dma_write(core->owner, (*ba)[0] + bastate->written[0], data, data_len);
bastate->written[0] += data_len;
bastate->cur_idx = 1;
}
static void
e1000e_write_to_rx_buffers(E1000ECore *core,
hwaddr (*ba)[MAX_PS_BUFFERS],
e1000e_ba_state *bastate,
const char *data,
dma_addr_t data_len)
{
while (data_len > 0) {
uint32_t cur_buf_len = core->rxbuf_sizes[bastate->cur_idx];
uint32_t cur_buf_bytes_left = cur_buf_len -
bastate->written[bastate->cur_idx];
uint32_t bytes_to_write = MIN(data_len, cur_buf_bytes_left);
trace_e1000e_rx_desc_buff_write(bastate->cur_idx,
(*ba)[bastate->cur_idx],
bastate->written[bastate->cur_idx],
data,
bytes_to_write);
pci_dma_write(core->owner,
(*ba)[bastate->cur_idx] + bastate->written[bastate->cur_idx],
data, bytes_to_write);
bastate->written[bastate->cur_idx] += bytes_to_write;
data += bytes_to_write;
data_len -= bytes_to_write;
if (bastate->written[bastate->cur_idx] == cur_buf_len) {
bastate->cur_idx++;
}
assert(bastate->cur_idx < MAX_PS_BUFFERS);
}
}
static void
e1000e_update_rx_stats(E1000ECore *core,
size_t data_size,
size_t data_fcs_size)
{
e1000x_update_rx_total_stats(core->mac, data_size, data_fcs_size);
switch (net_rx_pkt_get_packet_type(core->rx_pkt)) {
case ETH_PKT_BCAST:
e1000x_inc_reg_if_not_full(core->mac, BPRC);
break;
case ETH_PKT_MCAST:
e1000x_inc_reg_if_not_full(core->mac, MPRC);
break;
default:
break;
}
}
static inline bool
e1000e_rx_descr_threshold_hit(E1000ECore *core, const E1000E_RingInfo *rxi)
{
return e1000e_ring_free_descr_num(core, rxi) ==
e1000e_ring_len(core, rxi) >> core->rxbuf_min_shift;
}
static bool
e1000e_do_ps(E1000ECore *core, struct NetRxPkt *pkt, size_t *hdr_len)
{
bool isip4, isip6, isudp, istcp;
bool fragment;
if (!e1000e_rx_use_ps_descriptor(core)) {
return false;
}
net_rx_pkt_get_protocols(pkt, &isip4, &isip6, &isudp, &istcp);
if (isip4) {
fragment = net_rx_pkt_get_ip4_info(pkt)->fragment;
} else if (isip6) {
fragment = net_rx_pkt_get_ip6_info(pkt)->fragment;
} else {
return false;
}
if (fragment && (core->mac[RFCTL] & E1000_RFCTL_IPFRSP_DIS)) {
return false;
}
if (!fragment && (isudp || istcp)) {
*hdr_len = net_rx_pkt_get_l5_hdr_offset(pkt);
} else {
*hdr_len = net_rx_pkt_get_l4_hdr_offset(pkt);
}
if ((*hdr_len > core->rxbuf_sizes[0]) ||
(*hdr_len > net_rx_pkt_get_total_len(pkt))) {
return false;
}
return true;
}
static void
e1000e_write_packet_to_guest(E1000ECore *core, struct NetRxPkt *pkt,
const E1000E_RxRing *rxr,
const E1000E_RSSInfo *rss_info)
{
PCIDevice *d = core->owner;
dma_addr_t base;
uint8_t desc[E1000_MAX_RX_DESC_LEN];
size_t desc_size;
size_t desc_offset = 0;
size_t iov_ofs = 0;
struct iovec *iov = net_rx_pkt_get_iovec(pkt);
size_t size = net_rx_pkt_get_total_len(pkt);
size_t total_size = size + e1000x_fcs_len(core->mac);
const E1000E_RingInfo *rxi;
size_t ps_hdr_len = 0;
bool do_ps = e1000e_do_ps(core, pkt, &ps_hdr_len);
rxi = rxr->i;
do {
hwaddr ba[MAX_PS_BUFFERS];
e1000e_ba_state bastate = { { 0 } };
bool is_last = false;
bool is_first = true;
desc_size = total_size - desc_offset;
if (desc_size > core->rx_desc_buf_size) {
desc_size = core->rx_desc_buf_size;
}
base = e1000e_ring_head_descr(core, rxi);
pci_dma_read(d, base, &desc, core->rx_desc_len);
trace_e1000e_rx_descr(rxi->idx, base, core->rx_desc_len);
e1000e_read_rx_descr(core, desc, &ba);
if (ba[0]) {
if (desc_offset < size) {
static const uint32_t fcs_pad;
size_t iov_copy;
size_t copy_size = size - desc_offset;
if (copy_size > core->rx_desc_buf_size) {
copy_size = core->rx_desc_buf_size;
}
/* For PS mode copy the packet header first */
if (do_ps) {
if (is_first) {
size_t ps_hdr_copied = 0;
do {
iov_copy = MIN(ps_hdr_len - ps_hdr_copied,
iov->iov_len - iov_ofs);
e1000e_write_hdr_to_rx_buffers(core, &ba, &bastate,
iov->iov_base, iov_copy);
copy_size -= iov_copy;
ps_hdr_copied += iov_copy;
iov_ofs += iov_copy;
if (iov_ofs == iov->iov_len) {
iov++;
iov_ofs = 0;
}
} while (ps_hdr_copied < ps_hdr_len);
is_first = false;
} else {
/* Leave buffer 0 of each descriptor except first */
/* empty as per spec 7.1.5.1 */
e1000e_write_hdr_to_rx_buffers(core, &ba, &bastate,
NULL, 0);
}
}
/* Copy packet payload */
while (copy_size) {
iov_copy = MIN(copy_size, iov->iov_len - iov_ofs);
e1000e_write_to_rx_buffers(core, &ba, &bastate,
iov->iov_base + iov_ofs, iov_copy);
copy_size -= iov_copy;
iov_ofs += iov_copy;
if (iov_ofs == iov->iov_len) {
iov++;
iov_ofs = 0;
}
}
if (desc_offset + desc_size >= total_size) {
/* Simulate FCS checksum presence in the last descriptor */
e1000e_write_to_rx_buffers(core, &ba, &bastate,
(const char *) &fcs_pad, e1000x_fcs_len(core->mac));
}
}
desc_offset += desc_size;
if (desc_offset >= total_size) {
is_last = true;
}
} else { /* as per intel docs; skip descriptors with null buf addr */
trace_e1000e_rx_null_descriptor();
}
e1000e_write_rx_descr(core, desc, is_last ? core->rx_pkt : NULL,
rss_info, do_ps ? ps_hdr_len : 0, &bastate.written);
pci_dma_write(d, base, &desc, core->rx_desc_len);
e1000e_ring_advance(core, rxi,
core->rx_desc_len / E1000_MIN_RX_DESC_LEN);
} while (desc_offset < total_size);
e1000e_update_rx_stats(core, size, total_size);
}
static inline void
e1000e_rx_fix_l4_csum(E1000ECore *core, struct NetRxPkt *pkt)
{
if (net_rx_pkt_has_virt_hdr(pkt)) {
struct virtio_net_hdr *vhdr = net_rx_pkt_get_vhdr(pkt);
if (vhdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) {
net_rx_pkt_fix_l4_csum(pkt);
}
}
}
ssize_t
e1000e_receive_iov(E1000ECore *core, const struct iovec *iov, int iovcnt)
{
static const int maximum_ethernet_hdr_len = (14 + 4);
/* Min. octets in an ethernet frame sans FCS */
static const int min_buf_size = 60;
uint32_t n = 0;
uint8_t min_buf[min_buf_size];
struct iovec min_iov;
uint8_t *filter_buf;
size_t size, orig_size;
size_t iov_ofs = 0;
E1000E_RxRing rxr;
E1000E_RSSInfo rss_info;
size_t total_size;
ssize_t retval;
bool rdmts_hit;
trace_e1000e_rx_receive_iov(iovcnt);
if (!e1000x_hw_rx_enabled(core->mac)) {
return -1;
}
/* Pull virtio header in */
if (core->has_vnet) {
net_rx_pkt_set_vhdr_iovec(core->rx_pkt, iov, iovcnt);
iov_ofs = sizeof(struct virtio_net_hdr);
}
filter_buf = iov->iov_base + iov_ofs;
orig_size = iov_size(iov, iovcnt);
size = orig_size - iov_ofs;
/* Pad to minimum Ethernet frame length */
if (size < sizeof(min_buf)) {
iov_to_buf(iov, iovcnt, iov_ofs, min_buf, size);
memset(&min_buf[size], 0, sizeof(min_buf) - size);
e1000x_inc_reg_if_not_full(core->mac, RUC);
min_iov.iov_base = filter_buf = min_buf;
min_iov.iov_len = size = sizeof(min_buf);
iovcnt = 1;
iov = &min_iov;
iov_ofs = 0;
} else if (iov->iov_len < maximum_ethernet_hdr_len) {
/* This is very unlikely, but may happen. */
iov_to_buf(iov, iovcnt, iov_ofs, min_buf, maximum_ethernet_hdr_len);
filter_buf = min_buf;
}
/* Discard oversized packets if !LPE and !SBP. */
if (e1000x_is_oversized(core->mac, size)) {
return orig_size;
}
net_rx_pkt_set_packet_type(core->rx_pkt,
get_eth_packet_type(PKT_GET_ETH_HDR(filter_buf)));
if (!e1000e_receive_filter(core, filter_buf, size)) {
trace_e1000e_rx_flt_dropped();
return orig_size;
}
net_rx_pkt_attach_iovec_ex(core->rx_pkt, iov, iovcnt, iov_ofs,
e1000x_vlan_enabled(core->mac), core->vet);
e1000e_rss_parse_packet(core, core->rx_pkt, &rss_info);
e1000e_rx_ring_init(core, &rxr, rss_info.queue);
trace_e1000e_rx_rss_dispatched_to_queue(rxr.i->idx);
total_size = net_rx_pkt_get_total_len(core->rx_pkt) +
e1000x_fcs_len(core->mac);
if (e1000e_has_rxbufs(core, rxr.i, total_size)) {
e1000e_rx_fix_l4_csum(core, core->rx_pkt);
e1000e_write_packet_to_guest(core, core->rx_pkt, &rxr, &rss_info);
retval = orig_size;
/* Perform small receive detection (RSRPD) */
if (total_size < core->mac[RSRPD]) {
n |= E1000_ICS_SRPD;
}
/* Perform ACK receive detection */
if (!(core->mac[RFCTL] & E1000_RFCTL_ACK_DIS) &&
(e1000e_is_tcp_ack(core, core->rx_pkt))) {
n |= E1000_ICS_ACK;
}
/* Check if receive descriptor minimum threshold hit */
rdmts_hit = e1000e_rx_descr_threshold_hit(core, rxr.i);
n |= e1000e_rx_wb_interrupt_cause(core, rxr.i->idx, rdmts_hit);
trace_e1000e_rx_written_to_guest(n);
} else {
n |= E1000_ICS_RXO;
retval = 0;
trace_e1000e_rx_not_written_to_guest(n);
}
if (!e1000e_intrmgr_delay_rx_causes(core, &n)) {
trace_e1000e_rx_interrupt_set(n);
e1000e_set_interrupt_cause(core, n);
} else {
trace_e1000e_rx_interrupt_delayed(n);
}
return retval;
}
static inline bool
e1000e_have_autoneg(E1000ECore *core)
{
return core->phy[0][PHY_CTRL] & MII_CR_AUTO_NEG_EN;
}
static void e1000e_update_flowctl_status(E1000ECore *core)
{
if (e1000e_have_autoneg(core) &&
core->phy[0][PHY_STATUS] & MII_SR_AUTONEG_COMPLETE) {
trace_e1000e_link_autoneg_flowctl(true);
core->mac[CTRL] |= E1000_CTRL_TFCE | E1000_CTRL_RFCE;
} else {
trace_e1000e_link_autoneg_flowctl(false);
}
}
static inline void
e1000e_link_down(E1000ECore *core)
{
e1000x_update_regs_on_link_down(core->mac, core->phy[0]);
e1000e_update_flowctl_status(core);
}
static inline void
e1000e_set_phy_ctrl(E1000ECore *core, int index, uint16_t val)
{
/* bits 0-5 reserved; MII_CR_[RESTART_AUTO_NEG,RESET] are self clearing */
core->phy[0][PHY_CTRL] = val & ~(0x3f |
MII_CR_RESET |
MII_CR_RESTART_AUTO_NEG);
if ((val & MII_CR_RESTART_AUTO_NEG) &&
e1000e_have_autoneg(core)) {
e1000x_restart_autoneg(core->mac, core->phy[0], core->autoneg_timer);
}
}
static void
e1000e_set_phy_oem_bits(E1000ECore *core, int index, uint16_t val)
{
core->phy[0][PHY_OEM_BITS] = val & ~BIT(10);
if (val & BIT(10)) {
e1000x_restart_autoneg(core->mac, core->phy[0], core->autoneg_timer);
}
}
static void
e1000e_set_phy_page(E1000ECore *core, int index, uint16_t val)
{
core->phy[0][PHY_PAGE] = val & PHY_PAGE_RW_MASK;
}
void
e1000e_core_set_link_status(E1000ECore *core)
{
NetClientState *nc = qemu_get_queue(core->owner_nic);
uint32_t old_status = core->mac[STATUS];
trace_e1000e_link_status_changed(nc->link_down ? false : true);
if (nc->link_down) {
e1000x_update_regs_on_link_down(core->mac, core->phy[0]);
} else {
if (e1000e_have_autoneg(core) &&
!(core->phy[0][PHY_STATUS] & MII_SR_AUTONEG_COMPLETE)) {
e1000x_restart_autoneg(core->mac, core->phy[0],
core->autoneg_timer);
} else {
e1000x_update_regs_on_link_up(core->mac, core->phy[0]);
e1000e_start_recv(core);
}
}
if (core->mac[STATUS] != old_status) {
e1000e_set_interrupt_cause(core, E1000_ICR_LSC);
}
}
static void
e1000e_set_ctrl(E1000ECore *core, int index, uint32_t val)
{
trace_e1000e_core_ctrl_write(index, val);
/* RST is self clearing */
core->mac[CTRL] = val & ~E1000_CTRL_RST;
core->mac[CTRL_DUP] = core->mac[CTRL];
trace_e1000e_link_set_params(
!!(val & E1000_CTRL_ASDE),
(val & E1000_CTRL_SPD_SEL) >> E1000_CTRL_SPD_SHIFT,
!!(val & E1000_CTRL_FRCSPD),
!!(val & E1000_CTRL_FRCDPX),
!!(val & E1000_CTRL_RFCE),
!!(val & E1000_CTRL_TFCE));
if (val & E1000_CTRL_RST) {
trace_e1000e_core_ctrl_sw_reset();
e1000x_reset_mac_addr(core->owner_nic, core->mac, core->permanent_mac);
}
if (val & E1000_CTRL_PHY_RST) {
trace_e1000e_core_ctrl_phy_reset();
core->mac[STATUS] |= E1000_STATUS_PHYRA;
}
}
static void
e1000e_set_rfctl(E1000ECore *core, int index, uint32_t val)
{
trace_e1000e_rx_set_rfctl(val);
if (!(val & E1000_RFCTL_ISCSI_DIS)) {
trace_e1000e_wrn_iscsi_filtering_not_supported();
}
if (!(val & E1000_RFCTL_NFSW_DIS)) {
trace_e1000e_wrn_nfsw_filtering_not_supported();
}
if (!(val & E1000_RFCTL_NFSR_DIS)) {
trace_e1000e_wrn_nfsr_filtering_not_supported();
}
core->mac[RFCTL] = val;
}
static void
e1000e_calc_per_desc_buf_size(E1000ECore *core)
{
int i;
core->rx_desc_buf_size = 0;
for (i = 0; i < ARRAY_SIZE(core->rxbuf_sizes); i++) {
core->rx_desc_buf_size += core->rxbuf_sizes[i];
}
}
static void
e1000e_parse_rxbufsize(E1000ECore *core)
{
uint32_t rctl = core->mac[RCTL];
memset(core->rxbuf_sizes, 0, sizeof(core->rxbuf_sizes));
if (rctl & E1000_RCTL_DTYP_MASK) {
uint32_t bsize;
bsize = core->mac[PSRCTL] & E1000_PSRCTL_BSIZE0_MASK;
core->rxbuf_sizes[0] = (bsize >> E1000_PSRCTL_BSIZE0_SHIFT) * 128;
bsize = core->mac[PSRCTL] & E1000_PSRCTL_BSIZE1_MASK;
core->rxbuf_sizes[1] = (bsize >> E1000_PSRCTL_BSIZE1_SHIFT) * 1024;
bsize = core->mac[PSRCTL] & E1000_PSRCTL_BSIZE2_MASK;
core->rxbuf_sizes[2] = (bsize >> E1000_PSRCTL_BSIZE2_SHIFT) * 1024;
bsize = core->mac[PSRCTL] & E1000_PSRCTL_BSIZE3_MASK;
core->rxbuf_sizes[3] = (bsize >> E1000_PSRCTL_BSIZE3_SHIFT) * 1024;
} else if (rctl & E1000_RCTL_FLXBUF_MASK) {
int flxbuf = rctl & E1000_RCTL_FLXBUF_MASK;
core->rxbuf_sizes[0] = (flxbuf >> E1000_RCTL_FLXBUF_SHIFT) * 1024;
} else {
core->rxbuf_sizes[0] = e1000x_rxbufsize(rctl);
}
trace_e1000e_rx_desc_buff_sizes(core->rxbuf_sizes[0], core->rxbuf_sizes[1],
core->rxbuf_sizes[2], core->rxbuf_sizes[3]);
e1000e_calc_per_desc_buf_size(core);
}
static void
e1000e_calc_rxdesclen(E1000ECore *core)
{
if (e1000e_rx_use_legacy_descriptor(core)) {
core->rx_desc_len = sizeof(struct e1000_rx_desc);
} else {
if (core->mac[RCTL] & E1000_RCTL_DTYP_PS) {
core->rx_desc_len = sizeof(union e1000_rx_desc_packet_split);
} else {
core->rx_desc_len = sizeof(union e1000_rx_desc_extended);
}
}
trace_e1000e_rx_desc_len(core->rx_desc_len);
}
static void
e1000e_set_rx_control(E1000ECore *core, int index, uint32_t val)
{
core->mac[RCTL] = val;
trace_e1000e_rx_set_rctl(core->mac[RCTL]);
if (val & E1000_RCTL_EN) {
e1000e_parse_rxbufsize(core);
e1000e_calc_rxdesclen(core);
core->rxbuf_min_shift = ((val / E1000_RCTL_RDMTS_QUAT) & 3) + 1 +
E1000_RING_DESC_LEN_SHIFT;
e1000e_start_recv(core);
}
}
static
void(*e1000e_phyreg_writeops[E1000E_PHY_PAGES][E1000E_PHY_PAGE_SIZE])
(E1000ECore *, int, uint16_t) = {
[0] = {
[PHY_CTRL] = e1000e_set_phy_ctrl,
[PHY_PAGE] = e1000e_set_phy_page,
[PHY_OEM_BITS] = e1000e_set_phy_oem_bits
}
};
static inline void
e1000e_clear_ims_bits(E1000ECore *core, uint32_t bits)
{
trace_e1000e_irq_clear_ims(bits, core->mac[IMS], core->mac[IMS] & ~bits);
core->mac[IMS] &= ~bits;
}
static inline bool
e1000e_postpone_interrupt(bool *interrupt_pending,
E1000IntrDelayTimer *timer)
{
if (timer->running) {
trace_e1000e_irq_postponed_by_xitr(timer->delay_reg << 2);
*interrupt_pending = true;
return true;
}
if (timer->core->mac[timer->delay_reg] != 0) {
e1000e_intrmgr_rearm_timer(timer);
}
return false;
}
static inline bool
e1000e_itr_should_postpone(E1000ECore *core)
{
return e1000e_postpone_interrupt(&core->itr_intr_pending, &core->itr);
}
static inline bool
e1000e_eitr_should_postpone(E1000ECore *core, int idx)
{
return e1000e_postpone_interrupt(&core->eitr_intr_pending[idx],
&core->eitr[idx]);
}
static void
e1000e_msix_notify_one(E1000ECore *core, uint32_t cause, uint32_t int_cfg)
{
uint32_t effective_eiac;
if (E1000_IVAR_ENTRY_VALID(int_cfg)) {
uint32_t vec = E1000_IVAR_ENTRY_VEC(int_cfg);
if (vec < E1000E_MSIX_VEC_NUM) {
if (!e1000e_eitr_should_postpone(core, vec)) {
trace_e1000e_irq_msix_notify_vec(vec);
msix_notify(core->owner, vec);
}
} else {
trace_e1000e_wrn_msix_vec_wrong(cause, int_cfg);
}
} else {
trace_e1000e_wrn_msix_invalid(cause, int_cfg);
}
if (core->mac[CTRL_EXT] & E1000_CTRL_EXT_EIAME) {
trace_e1000e_irq_iam_clear_eiame(core->mac[IAM], cause);
core->mac[IAM] &= ~cause;
}
trace_e1000e_irq_icr_clear_eiac(core->mac[ICR], core->mac[EIAC]);
effective_eiac = core->mac[EIAC] & cause;
if (effective_eiac == E1000_ICR_OTHER) {
effective_eiac |= E1000_ICR_OTHER_CAUSES;
}
core->mac[ICR] &= ~effective_eiac;
if (!(core->mac[CTRL_EXT] & E1000_CTRL_EXT_IAME)) {
core->mac[IMS] &= ~effective_eiac;
}
}
static void
e1000e_msix_notify(E1000ECore *core, uint32_t causes)
{
if (causes & E1000_ICR_RXQ0) {
e1000e_msix_notify_one(core, E1000_ICR_RXQ0,
E1000_IVAR_RXQ0(core->mac[IVAR]));
}
if (causes & E1000_ICR_RXQ1) {
e1000e_msix_notify_one(core, E1000_ICR_RXQ1,
E1000_IVAR_RXQ1(core->mac[IVAR]));
}
if (causes & E1000_ICR_TXQ0) {
e1000e_msix_notify_one(core, E1000_ICR_TXQ0,
E1000_IVAR_TXQ0(core->mac[IVAR]));
}
if (causes & E1000_ICR_TXQ1) {
e1000e_msix_notify_one(core, E1000_ICR_TXQ1,
E1000_IVAR_TXQ1(core->mac[IVAR]));
}
if (causes & E1000_ICR_OTHER) {
e1000e_msix_notify_one(core, E1000_ICR_OTHER,
E1000_IVAR_OTHER(core->mac[IVAR]));
}
}
static void
e1000e_msix_clear_one(E1000ECore *core, uint32_t cause, uint32_t int_cfg)
{
if (E1000_IVAR_ENTRY_VALID(int_cfg)) {
uint32_t vec = E1000_IVAR_ENTRY_VEC(int_cfg);
if (vec < E1000E_MSIX_VEC_NUM) {
trace_e1000e_irq_msix_pending_clearing(cause, int_cfg, vec);
msix_clr_pending(core->owner, vec);
} else {
trace_e1000e_wrn_msix_vec_wrong(cause, int_cfg);
}
} else {
trace_e1000e_wrn_msix_invalid(cause, int_cfg);
}
}
static void
e1000e_msix_clear(E1000ECore *core, uint32_t causes)
{
if (causes & E1000_ICR_RXQ0) {
e1000e_msix_clear_one(core, E1000_ICR_RXQ0,
E1000_IVAR_RXQ0(core->mac[IVAR]));
}
if (causes & E1000_ICR_RXQ1) {
e1000e_msix_clear_one(core, E1000_ICR_RXQ1,
E1000_IVAR_RXQ1(core->mac[IVAR]));
}
if (causes & E1000_ICR_TXQ0) {
e1000e_msix_clear_one(core, E1000_ICR_TXQ0,
E1000_IVAR_TXQ0(core->mac[IVAR]));
}
if (causes & E1000_ICR_TXQ1) {
e1000e_msix_clear_one(core, E1000_ICR_TXQ1,
E1000_IVAR_TXQ1(core->mac[IVAR]));
}
if (causes & E1000_ICR_OTHER) {
e1000e_msix_clear_one(core, E1000_ICR_OTHER,
E1000_IVAR_OTHER(core->mac[IVAR]));
}
}
static inline void
e1000e_fix_icr_asserted(E1000ECore *core)
{
core->mac[ICR] &= ~E1000_ICR_ASSERTED;
if (core->mac[ICR]) {
core->mac[ICR] |= E1000_ICR_ASSERTED;
}
trace_e1000e_irq_fix_icr_asserted(core->mac[ICR]);
}
static void
e1000e_send_msi(E1000ECore *core, bool msix)
{
uint32_t causes = core->mac[ICR] & core->mac[IMS] & ~E1000_ICR_ASSERTED;
if (msix) {
e1000e_msix_notify(core, causes);
} else {
if (!e1000e_itr_should_postpone(core)) {
trace_e1000e_irq_msi_notify(causes);
msi_notify(core->owner, 0);
}
}
}
static void
e1000e_update_interrupt_state(E1000ECore *core)
{
bool interrupts_pending;
bool is_msix = msix_enabled(core->owner);
/* Set ICR[OTHER] for MSI-X */
if (is_msix) {
if (core->mac[ICR] & E1000_ICR_OTHER_CAUSES) {
core->mac[ICR] |= E1000_ICR_OTHER;
trace_e1000e_irq_add_msi_other(core->mac[ICR]);
}
}
e1000e_fix_icr_asserted(core);
/*
* 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.
*/
core->mac[ICS] = core->mac[ICR];
interrupts_pending = (core->mac[IMS] & core->mac[ICR]) ? true : false;
trace_e1000e_irq_pending_interrupts(core->mac[ICR] & core->mac[IMS],
core->mac[ICR], core->mac[IMS]);
if (is_msix || msi_enabled(core->owner)) {
if (interrupts_pending) {
e1000e_send_msi(core, is_msix);
}
} else {
if (interrupts_pending) {
if (!e1000e_itr_should_postpone(core)) {
e1000e_raise_legacy_irq(core);
}
} else {
e1000e_lower_legacy_irq(core);
}
}
}
static void
e1000e_set_interrupt_cause(E1000ECore *core, uint32_t val)
{
trace_e1000e_irq_set_cause_entry(val, core->mac[ICR]);
val |= e1000e_intmgr_collect_delayed_causes(core);
core->mac[ICR] |= val;
trace_e1000e_irq_set_cause_exit(val, core->mac[ICR]);
e1000e_update_interrupt_state(core);
}
static inline void
e1000e_autoneg_timer(void *opaque)
{
E1000ECore *core = opaque;
if (!qemu_get_queue(core->owner_nic)->link_down) {
e1000x_update_regs_on_autoneg_done(core->mac, core->phy[0]);
e1000e_start_recv(core);
e1000e_update_flowctl_status(core);
/* signal link status change to the guest */
e1000e_set_interrupt_cause(core, E1000_ICR_LSC);
}
}
static inline uint16_t
e1000e_get_reg_index_with_offset(const uint16_t *mac_reg_access, hwaddr addr)
{
uint16_t index = (addr & 0x1ffff) >> 2;
return index + (mac_reg_access[index] & 0xfffe);
}
static const char e1000e_phy_regcap[E1000E_PHY_PAGES][0x20] = {
[0] = {
[PHY_CTRL] = PHY_ANYPAGE | PHY_RW,
[PHY_STATUS] = PHY_ANYPAGE | PHY_R,
[PHY_ID1] = PHY_ANYPAGE | PHY_R,
[PHY_ID2] = PHY_ANYPAGE | PHY_R,
[PHY_AUTONEG_ADV] = PHY_ANYPAGE | PHY_RW,
[PHY_LP_ABILITY] = PHY_ANYPAGE | PHY_R,
[PHY_AUTONEG_EXP] = PHY_ANYPAGE | PHY_R,
[PHY_NEXT_PAGE_TX] = PHY_ANYPAGE | PHY_RW,
[PHY_LP_NEXT_PAGE] = PHY_ANYPAGE | PHY_R,
[PHY_1000T_CTRL] = PHY_ANYPAGE | PHY_RW,
[PHY_1000T_STATUS] = PHY_ANYPAGE | PHY_R,
[PHY_EXT_STATUS] = PHY_ANYPAGE | PHY_R,
[PHY_PAGE] = PHY_ANYPAGE | PHY_RW,
[PHY_COPPER_CTRL1] = PHY_RW,
[PHY_COPPER_STAT1] = PHY_R,
[PHY_COPPER_CTRL3] = PHY_RW,
[PHY_RX_ERR_CNTR] = PHY_R,
[PHY_OEM_BITS] = PHY_RW,
[PHY_BIAS_1] = PHY_RW,
[PHY_BIAS_2] = PHY_RW,
[PHY_COPPER_INT_ENABLE] = PHY_RW,
[PHY_COPPER_STAT2] = PHY_R,
[PHY_COPPER_CTRL2] = PHY_RW
},
[2] = {
[PHY_MAC_CTRL1] = PHY_RW,
[PHY_MAC_INT_ENABLE] = PHY_RW,
[PHY_MAC_STAT] = PHY_R,
[PHY_MAC_CTRL2] = PHY_RW
},
[3] = {
[PHY_LED_03_FUNC_CTRL1] = PHY_RW,
[PHY_LED_03_POL_CTRL] = PHY_RW,
[PHY_LED_TIMER_CTRL] = PHY_RW,
[PHY_LED_45_CTRL] = PHY_RW
},
[5] = {
[PHY_1000T_SKEW] = PHY_R,
[PHY_1000T_SWAP] = PHY_R
},
[6] = {
[PHY_CRC_COUNTERS] = PHY_R
}
};
static bool
e1000e_phy_reg_check_cap(E1000ECore *core, uint32_t addr,
char cap, uint8_t *page)
{
*page =
(e1000e_phy_regcap[0][addr] & PHY_ANYPAGE) ? 0
: core->phy[0][PHY_PAGE];
if (*page >= E1000E_PHY_PAGES) {
return false;
}
return e1000e_phy_regcap[*page][addr] & cap;
}
static void
e1000e_phy_reg_write(E1000ECore *core, uint8_t page,
uint32_t addr, uint16_t data)
{
assert(page < E1000E_PHY_PAGES);
assert(addr < E1000E_PHY_PAGE_SIZE);
if (e1000e_phyreg_writeops[page][addr]) {
e1000e_phyreg_writeops[page][addr](core, addr, data);
} else {
core->phy[page][addr] = data;
}
}
static void
e1000e_set_mdic(E1000ECore *core, 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);
uint8_t page;
if ((val & E1000_MDIC_PHY_MASK) >> E1000_MDIC_PHY_SHIFT != 1) { /* phy # */
val = core->mac[MDIC] | E1000_MDIC_ERROR;
} else if (val & E1000_MDIC_OP_READ) {
if (!e1000e_phy_reg_check_cap(core, addr, PHY_R, &page)) {
trace_e1000e_core_mdic_read_unhandled(page, addr);
val |= E1000_MDIC_ERROR;
} else {
val = (val ^ data) | core->phy[page][addr];
trace_e1000e_core_mdic_read(page, addr, val);
}
} else if (val & E1000_MDIC_OP_WRITE) {
if (!e1000e_phy_reg_check_cap(core, addr, PHY_W, &page)) {
trace_e1000e_core_mdic_write_unhandled(page, addr);
val |= E1000_MDIC_ERROR;
} else {
trace_e1000e_core_mdic_write(page, addr, data);
e1000e_phy_reg_write(core, page, addr, data);
}
}
core->mac[MDIC] = val | E1000_MDIC_READY;
if (val & E1000_MDIC_INT_EN) {
e1000e_set_interrupt_cause(core, E1000_ICR_MDAC);
}
}
static void
e1000e_set_rdt(E1000ECore *core, int index, uint32_t val)
{
core->mac[index] = val & 0xffff;
trace_e1000e_rx_set_rdt(e1000e_mq_queue_idx(RDT0, index), val);
e1000e_start_recv(core);
}
static void
e1000e_set_status(E1000ECore *core, int index, uint32_t val)
{
if ((val & E1000_STATUS_PHYRA) == 0) {
core->mac[index] &= ~E1000_STATUS_PHYRA;
}
}
static void
e1000e_set_ctrlext(E1000ECore *core, int index, uint32_t val)
{
trace_e1000e_link_set_ext_params(!!(val & E1000_CTRL_EXT_ASDCHK),
!!(val & E1000_CTRL_EXT_SPD_BYPS));
/* Zero self-clearing bits */
val &= ~(E1000_CTRL_EXT_ASDCHK | E1000_CTRL_EXT_EE_RST);
core->mac[CTRL_EXT] = val;
}
static void
e1000e_set_pbaclr(E1000ECore *core, int index, uint32_t val)
{
int i;
core->mac[PBACLR] = val & E1000_PBACLR_VALID_MASK;
if (!msix_enabled(core->owner)) {
return;
}
for (i = 0; i < E1000E_MSIX_VEC_NUM; i++) {
if (core->mac[PBACLR] & BIT(i)) {
msix_clr_pending(core->owner, i);
}
}
}
static void
e1000e_set_fcrth(E1000ECore *core, int index, uint32_t val)
{
core->mac[FCRTH] = val & 0xFFF8;
}
static void
e1000e_set_fcrtl(E1000ECore *core, int index, uint32_t val)
{
core->mac[FCRTL] = val & 0x8000FFF8;
}
static inline void
e1000e_set_16bit(E1000ECore *core, int index, uint32_t val)
{
core->mac[index] = val & 0xffff;
}
static void
e1000e_set_12bit(E1000ECore *core, int index, uint32_t val)
{
core->mac[index] = val & 0xfff;
}
static void
e1000e_set_vet(E1000ECore *core, int index, uint32_t val)
{
core->mac[VET] = val & 0xffff;
core->vet = le16_to_cpu(core->mac[VET]);
trace_e1000e_vlan_vet(core->vet);
}
static void
e1000e_set_dlen(E1000ECore *core, int index, uint32_t val)
{
core->mac[index] = val & E1000_XDLEN_MASK;
}
static void
e1000e_set_dbal(E1000ECore *core, int index, uint32_t val)
{
core->mac[index] = val & E1000_XDBAL_MASK;
}
static void
e1000e_set_tctl(E1000ECore *core, int index, uint32_t val)
{
E1000E_TxRing txr;
core->mac[index] = val;
if (core->mac[TARC0] & E1000_TARC_ENABLE) {
e1000e_tx_ring_init(core, &txr, 0);
e1000e_start_xmit(core, &txr);
}
if (core->mac[TARC1] & E1000_TARC_ENABLE) {
e1000e_tx_ring_init(core, &txr, 1);
e1000e_start_xmit(core, &txr);
}
}
static void
e1000e_set_tdt(E1000ECore *core, int index, uint32_t val)
{
E1000E_TxRing txr;
int qidx = e1000e_mq_queue_idx(TDT, index);
uint32_t tarc_reg = (qidx == 0) ? TARC0 : TARC1;
core->mac[index] = val & 0xffff;
if (core->mac[tarc_reg] & E1000_TARC_ENABLE) {
e1000e_tx_ring_init(core, &txr, qidx);
e1000e_start_xmit(core, &txr);
}
}
static void
e1000e_set_ics(E1000ECore *core, int index, uint32_t val)
{
trace_e1000e_irq_write_ics(val);
e1000e_set_interrupt_cause(core, val);
}
static void
e1000e_set_icr(E1000ECore *core, int index, uint32_t val)
{
if ((core->mac[ICR] & E1000_ICR_ASSERTED) &&
(core->mac[CTRL_EXT] & E1000_CTRL_EXT_IAME)) {
trace_e1000e_irq_icr_process_iame();
e1000e_clear_ims_bits(core, core->mac[IAM]);
}
trace_e1000e_irq_icr_write(val, core->mac[ICR], core->mac[ICR] & ~val);
core->mac[ICR] &= ~val;
e1000e_update_interrupt_state(core);
}
static void
e1000e_set_imc(E1000ECore *core, int index, uint32_t val)
{
trace_e1000e_irq_ims_clear_set_imc(val);
e1000e_clear_ims_bits(core, val);
e1000e_update_interrupt_state(core);
}
static void
e1000e_set_ims(E1000ECore *core, int index, uint32_t val)
{
static const uint32_t ims_ext_mask =
E1000_IMS_RXQ0 | E1000_IMS_RXQ1 |
E1000_IMS_TXQ0 | E1000_IMS_TXQ1 |
E1000_IMS_OTHER;
static const uint32_t ims_valid_mask =
E1000_IMS_TXDW | E1000_IMS_TXQE | E1000_IMS_LSC |
E1000_IMS_RXDMT0 | E1000_IMS_RXO | E1000_IMS_RXT0 |
E1000_IMS_MDAC | E1000_IMS_TXD_LOW | E1000_IMS_SRPD |
E1000_IMS_ACK | E1000_IMS_MNG | E1000_IMS_RXQ0 |
E1000_IMS_RXQ1 | E1000_IMS_TXQ0 | E1000_IMS_TXQ1 |
E1000_IMS_OTHER;
uint32_t valid_val = val & ims_valid_mask;
trace_e1000e_irq_set_ims(val, core->mac[IMS], core->mac[IMS] | valid_val);
core->mac[IMS] |= valid_val;
if ((valid_val & ims_ext_mask) &&
(core->mac[CTRL_EXT] & E1000_CTRL_EXT_PBA_CLR) &&
msix_enabled(core->owner)) {
e1000e_msix_clear(core, valid_val);
}
if ((valid_val == ims_valid_mask) &&
(core->mac[CTRL_EXT] & E1000_CTRL_EXT_INT_TIMERS_CLEAR_ENA)) {
trace_e1000e_irq_fire_all_timers(val);
e1000e_intrmgr_fire_all_timers(core);
}
e1000e_update_interrupt_state(core);
}
static void
e1000e_set_rdtr(E1000ECore *core, int index, uint32_t val)
{
e1000e_set_16bit(core, index, val);
if ((val & E1000_RDTR_FPD) && (core->rdtr.running)) {
trace_e1000e_irq_rdtr_fpd_running();
e1000e_intrmgr_fire_delayed_interrupts(core);
} else {
trace_e1000e_irq_rdtr_fpd_not_running();
}
}
static void
e1000e_set_tidv(E1000ECore *core, int index, uint32_t val)
{
e1000e_set_16bit(core, index, val);
if ((val & E1000_TIDV_FPD) && (core->tidv.running)) {
trace_e1000e_irq_tidv_fpd_running();
e1000e_intrmgr_fire_delayed_interrupts(core);
} else {
trace_e1000e_irq_tidv_fpd_not_running();
}
}
static uint32_t
e1000e_mac_readreg(E1000ECore *core, int index)
{
return core->mac[index];
}
static uint32_t
e1000e_mac_ics_read(E1000ECore *core, int index)
{
trace_e1000e_irq_read_ics(core->mac[ICS]);
return core->mac[ICS];
}
static uint32_t
e1000e_mac_ims_read(E1000ECore *core, int index)
{
trace_e1000e_irq_read_ims(core->mac[IMS]);
return core->mac[IMS];
}
#define E1000E_LOW_BITS_READ_FUNC(num) \
static uint32_t \
e1000e_mac_low##num##_read(E1000ECore *core, int index) \
{ \
return core->mac[index] & (BIT(num) - 1); \
} \
#define E1000E_LOW_BITS_READ(num) \
e1000e_mac_low##num##_read
E1000E_LOW_BITS_READ_FUNC(4);
E1000E_LOW_BITS_READ_FUNC(6);
E1000E_LOW_BITS_READ_FUNC(11);
E1000E_LOW_BITS_READ_FUNC(13);
E1000E_LOW_BITS_READ_FUNC(16);
static uint32_t
e1000e_mac_swsm_read(E1000ECore *core, int index)
{
uint32_t val = core->mac[SWSM];
core->mac[SWSM] = val | 1;
return val;
}
static uint32_t
e1000e_mac_itr_read(E1000ECore *core, int index)
{
return core->itr_guest_value;
}
static uint32_t
e1000e_mac_eitr_read(E1000ECore *core, int index)
{
return core->eitr_guest_value[index - EITR];
}
static uint32_t
e1000e_mac_icr_read(E1000ECore *core, int index)
{
uint32_t ret = core->mac[ICR];
trace_e1000e_irq_icr_read_entry(ret);
if (core->mac[IMS] == 0) {
trace_e1000e_irq_icr_clear_zero_ims();
core->mac[ICR] = 0;
}
if ((core->mac[ICR] & E1000_ICR_ASSERTED) &&
(core->mac[CTRL_EXT] & E1000_CTRL_EXT_IAME)) {
trace_e1000e_irq_icr_clear_iame();
core->mac[ICR] = 0;
trace_e1000e_irq_icr_process_iame();
e1000e_clear_ims_bits(core, core->mac[IAM]);
}
trace_e1000e_irq_icr_read_exit(core->mac[ICR]);
e1000e_update_interrupt_state(core);
return ret;
}
static uint32_t
e1000e_mac_read_clr4(E1000ECore *core, int index)
{
uint32_t ret = core->mac[index];
core->mac[index] = 0;
return ret;
}
static uint32_t
e1000e_mac_read_clr8(E1000ECore *core, int index)
{
uint32_t ret = core->mac[index];
core->mac[index] = 0;
core->mac[index - 1] = 0;
return ret;
}
static uint32_t
e1000e_get_ctrl(E1000ECore *core, int index)
{
uint32_t val = core->mac[CTRL];
trace_e1000e_link_read_params(
!!(val & E1000_CTRL_ASDE),
(val & E1000_CTRL_SPD_SEL) >> E1000_CTRL_SPD_SHIFT,
!!(val & E1000_CTRL_FRCSPD),
!!(val & E1000_CTRL_FRCDPX),
!!(val & E1000_CTRL_RFCE),
!!(val & E1000_CTRL_TFCE));
return val;
}
static uint32_t
e1000e_get_status(E1000ECore *core, int index)
{
uint32_t res = core->mac[STATUS];
if (!(core->mac[CTRL] & E1000_CTRL_GIO_MASTER_DISABLE)) {
res |= E1000_STATUS_GIO_MASTER_ENABLE;
}
if (core->mac[CTRL] & E1000_CTRL_FRCDPX) {
res |= (core->mac[CTRL] & E1000_CTRL_FD) ? E1000_STATUS_FD : 0;
} else {
res |= E1000_STATUS_FD;
}
if ((core->mac[CTRL] & E1000_CTRL_FRCSPD) ||
(core->mac[CTRL_EXT] & E1000_CTRL_EXT_SPD_BYPS)) {
switch (core->mac[CTRL] & E1000_CTRL_SPD_SEL) {
case E1000_CTRL_SPD_10:
res |= E1000_STATUS_SPEED_10;
break;
case E1000_CTRL_SPD_100:
res |= E1000_STATUS_SPEED_100;
break;
case E1000_CTRL_SPD_1000:
default:
res |= E1000_STATUS_SPEED_1000;
break;
}
} else {
res |= E1000_STATUS_SPEED_1000;
}
trace_e1000e_link_status(
!!(res & E1000_STATUS_LU),
!!(res & E1000_STATUS_FD),
(res & E1000_STATUS_SPEED_MASK) >> E1000_STATUS_SPEED_SHIFT,
(res & E1000_STATUS_ASDV) >> E1000_STATUS_ASDV_SHIFT);
return res;
}
static uint32_t
e1000e_get_tarc(E1000ECore *core, int index)
{
return core->mac[index] & ((BIT(11) - 1) |
BIT(27) |
BIT(28) |
BIT(29) |
BIT(30));
}
static void
e1000e_mac_writereg(E1000ECore *core, int index, uint32_t val)
{
core->mac[index] = val;
}
static void
e1000e_mac_setmacaddr(E1000ECore *core, int index, uint32_t val)
{
uint32_t macaddr[2];
core->mac[index] = val;
macaddr[0] = cpu_to_le32(core->mac[RA]);
macaddr[1] = cpu_to_le32(core->mac[RA + 1]);
qemu_format_nic_info_str(qemu_get_queue(core->owner_nic),
(uint8_t *) macaddr);
trace_e1000e_mac_set_sw(MAC_ARG(macaddr));
}
static void
e1000e_set_eecd(E1000ECore *core, int index, uint32_t val)
{
static const uint32_t ro_bits = E1000_EECD_PRES |
E1000_EECD_AUTO_RD |
E1000_EECD_SIZE_EX_MASK;
core->mac[EECD] = (core->mac[EECD] & ro_bits) | (val & ~ro_bits);
}
static void
e1000e_set_eerd(E1000ECore *core, int index, uint32_t val)
{
uint32_t addr = (val >> E1000_EERW_ADDR_SHIFT) & E1000_EERW_ADDR_MASK;
uint32_t flags = 0;
uint32_t data = 0;
if ((addr < E1000E_EEPROM_SIZE) && (val & E1000_EERW_START)) {
data = core->eeprom[addr];
flags = E1000_EERW_DONE;
}
core->mac[EERD] = flags |
(addr << E1000_EERW_ADDR_SHIFT) |
(data << E1000_EERW_DATA_SHIFT);
}
static void
e1000e_set_eewr(E1000ECore *core, int index, uint32_t val)
{
uint32_t addr = (val >> E1000_EERW_ADDR_SHIFT) & E1000_EERW_ADDR_MASK;
uint32_t data = (val >> E1000_EERW_DATA_SHIFT) & E1000_EERW_DATA_MASK;
uint32_t flags = 0;
if ((addr < E1000E_EEPROM_SIZE) && (val & E1000_EERW_START)) {
core->eeprom[addr] = data;
flags = E1000_EERW_DONE;
}
core->mac[EERD] = flags |
(addr << E1000_EERW_ADDR_SHIFT) |
(data << E1000_EERW_DATA_SHIFT);
}
static void
e1000e_set_rxdctl(E1000ECore *core, int index, uint32_t val)
{
core->mac[RXDCTL] = core->mac[RXDCTL1] = val;
}
static void
e1000e_set_itr(E1000ECore *core, int index, uint32_t val)
{
uint32_t interval = val & 0xffff;
trace_e1000e_irq_itr_set(val);
core->itr_guest_value = interval;
core->mac[index] = MAX(interval, E1000E_MIN_XITR);
}
static void
e1000e_set_eitr(E1000ECore *core, int index, uint32_t val)
{
uint32_t interval = val & 0xffff;
uint32_t eitr_num = index - EITR;
trace_e1000e_irq_eitr_set(eitr_num, val);
core->eitr_guest_value[eitr_num] = interval;
core->mac[index] = MAX(interval, E1000E_MIN_XITR);
}
static void
e1000e_set_psrctl(E1000ECore *core, int index, uint32_t val)
{
if ((val & E1000_PSRCTL_BSIZE0_MASK) == 0) {
hw_error("e1000e: PSRCTL.BSIZE0 cannot be zero");
}
if ((val & E1000_PSRCTL_BSIZE1_MASK) == 0) {
hw_error("e1000e: PSRCTL.BSIZE1 cannot be zero");
}
core->mac[PSRCTL] = val;
}
static void
e1000e_update_rx_offloads(E1000ECore *core)
{
int cso_state = e1000e_rx_l4_cso_enabled(core);
trace_e1000e_rx_set_cso(cso_state);
if (core->has_vnet) {
qemu_set_offload(qemu_get_queue(core->owner_nic)->peer,
cso_state, 0, 0, 0, 0);
}
}
static void
e1000e_set_rxcsum(E1000ECore *core, int index, uint32_t val)
{
core->mac[RXCSUM] = val;
e1000e_update_rx_offloads(core);
}
static void
e1000e_set_gcr(E1000ECore *core, int index, uint32_t val)
{
uint32_t ro_bits = core->mac[GCR] & E1000_GCR_RO_BITS;
core->mac[GCR] = (val & ~E1000_GCR_RO_BITS) | ro_bits;
}
#define e1000e_getreg(x) [x] = e1000e_mac_readreg
static uint32_t (*e1000e_macreg_readops[])(E1000ECore *, int) = {
e1000e_getreg(PBA),
e1000e_getreg(WUFC),
e1000e_getreg(MANC),
e1000e_getreg(TOTL),
e1000e_getreg(RDT0),
e1000e_getreg(RDBAH0),
e1000e_getreg(TDBAL1),
e1000e_getreg(RDLEN0),
e1000e_getreg(RDH1),
e1000e_getreg(LATECOL),
e1000e_getreg(SEC),
e1000e_getreg(XONTXC),
e1000e_getreg(WUS),
e1000e_getreg(GORCL),
e1000e_getreg(MGTPRC),
e1000e_getreg(EERD),
e1000e_getreg(EIAC),
e1000e_getreg(PSRCTL),
e1000e_getreg(MANC2H),
e1000e_getreg(RXCSUM),
e1000e_getreg(GSCL_3),
e1000e_getreg(GSCN_2),
e1000e_getreg(RSRPD),
e1000e_getreg(RDBAL1),
e1000e_getreg(FCAH),
e1000e_getreg(FCRTH),
e1000e_getreg(FLOP),
e1000e_getreg(FLASHT),
e1000e_getreg(RXSTMPH),
e1000e_getreg(TXSTMPL),
e1000e_getreg(TIMADJL),
e1000e_getreg(TXDCTL),
e1000e_getreg(RDH0),
e1000e_getreg(TDT1),
e1000e_getreg(TNCRS),
e1000e_getreg(RJC),
e1000e_getreg(IAM),
e1000e_getreg(GSCL_2),
e1000e_getreg(RDBAH1),
e1000e_getreg(FLSWDATA),
e1000e_getreg(RXSATRH),
e1000e_getreg(TIPG),
e1000e_getreg(FLMNGCTL),
e1000e_getreg(FLMNGCNT),
e1000e_getreg(TSYNCTXCTL),
e1000e_getreg(EXTCNF_SIZE),
e1000e_getreg(EXTCNF_CTRL),
e1000e_getreg(EEMNGDATA),
e1000e_getreg(CTRL_EXT),
e1000e_getreg(SYSTIMH),
e1000e_getreg(EEMNGCTL),
e1000e_getreg(FLMNGDATA),
e1000e_getreg(TSYNCRXCTL),
e1000e_getreg(TDH),
e1000e_getreg(LEDCTL),
e1000e_getreg(STATUS),
e1000e_getreg(TCTL),
e1000e_getreg(TDBAL),
e1000e_getreg(TDLEN),
e1000e_getreg(TDH1),
e1000e_getreg(RADV),
e1000e_getreg(ECOL),
e1000e_getreg(DC),
e1000e_getreg(RLEC),
e1000e_getreg(XOFFTXC),
e1000e_getreg(RFC),
e1000e_getreg(RNBC),
e1000e_getreg(MGTPTC),
e1000e_getreg(TIMINCA),
e1000e_getreg(RXCFGL),
e1000e_getreg(MFUTP01),
e1000e_getreg(FACTPS),
e1000e_getreg(GSCL_1),
e1000e_getreg(GSCN_0),
e1000e_getreg(GCR2),
e1000e_getreg(RDT1),
e1000e_getreg(PBACLR),
e1000e_getreg(FCTTV),
e1000e_getreg(EEWR),
e1000e_getreg(FLSWCTL),
e1000e_getreg(RXDCTL1),
e1000e_getreg(RXSATRL),
e1000e_getreg(SYSTIML),
e1000e_getreg(RXUDP),
e1000e_getreg(TORL),
e1000e_getreg(TDLEN1),
e1000e_getreg(MCC),
e1000e_getreg(WUC),
e1000e_getreg(EECD),
e1000e_getreg(MFUTP23),
e1000e_getreg(RAID),
e1000e_getreg(FCRTV),
e1000e_getreg(TXDCTL1),
e1000e_getreg(RCTL),
e1000e_getreg(TDT),
e1000e_getreg(MDIC),
e1000e_getreg(FCRUC),
e1000e_getreg(VET),
e1000e_getreg(RDBAL0),
e1000e_getreg(TDBAH1),
e1000e_getreg(RDTR),
e1000e_getreg(SCC),
e1000e_getreg(COLC),
e1000e_getreg(CEXTERR),
e1000e_getreg(XOFFRXC),
e1000e_getreg(IPAV),
e1000e_getreg(GOTCL),
e1000e_getreg(MGTPDC),
e1000e_getreg(GCR),
e1000e_getreg(IVAR),
e1000e_getreg(POEMB),
e1000e_getreg(MFVAL),
e1000e_getreg(FUNCTAG),
e1000e_getreg(GSCL_4),
e1000e_getreg(GSCN_3),
e1000e_getreg(MRQC),
e1000e_getreg(RDLEN1),
e1000e_getreg(FCT),
e1000e_getreg(FLA),
e1000e_getreg(FLOL),
e1000e_getreg(RXDCTL),
e1000e_getreg(RXSTMPL),
e1000e_getreg(TXSTMPH),
e1000e_getreg(TIMADJH),
e1000e_getreg(FCRTL),
e1000e_getreg(TDBAH),
e1000e_getreg(TADV),
e1000e_getreg(XONRXC),
e1000e_getreg(TSCTFC),
e1000e_getreg(RFCTL),
e1000e_getreg(GSCN_1),
e1000e_getreg(FCAL),
e1000e_getreg(FLSWCNT),
[TOTH] = e1000e_mac_read_clr8,
[GOTCH] = e1000e_mac_read_clr8,
[PRC64] = e1000e_mac_read_clr4,
[PRC255] = e1000e_mac_read_clr4,
[PRC1023] = e1000e_mac_read_clr4,
[PTC64] = e1000e_mac_read_clr4,
[PTC255] = e1000e_mac_read_clr4,
[PTC1023] = e1000e_mac_read_clr4,
[GPRC] = e1000e_mac_read_clr4,
[TPT] = e1000e_mac_read_clr4,
[RUC] = e1000e_mac_read_clr4,
[BPRC] = e1000e_mac_read_clr4,
[MPTC] = e1000e_mac_read_clr4,
[IAC] = e1000e_mac_read_clr4,
[ICR] = e1000e_mac_icr_read,
[RDFH] = E1000E_LOW_BITS_READ(13),
[RDFHS] = E1000E_LOW_BITS_READ(13),
[RDFPC] = E1000E_LOW_BITS_READ(13),
[TDFH] = E1000E_LOW_BITS_READ(13),
[TDFHS] = E1000E_LOW_BITS_READ(13),
[STATUS] = e1000e_get_status,
[TARC0] = e1000e_get_tarc,
[PBS] = E1000E_LOW_BITS_READ(6),
[ICS] = e1000e_mac_ics_read,
[AIT] = E1000E_LOW_BITS_READ(16),
[TORH] = e1000e_mac_read_clr8,
[GORCH] = e1000e_mac_read_clr8,
[PRC127] = e1000e_mac_read_clr4,
[PRC511] = e1000e_mac_read_clr4,
[PRC1522] = e1000e_mac_read_clr4,
[PTC127] = e1000e_mac_read_clr4,
[PTC511] = e1000e_mac_read_clr4,
[PTC1522] = e1000e_mac_read_clr4,
[GPTC] = e1000e_mac_read_clr4,
[TPR] = e1000e_mac_read_clr4,
[ROC] = e1000e_mac_read_clr4,
[MPRC] = e1000e_mac_read_clr4,
[BPTC] = e1000e_mac_read_clr4,
[TSCTC] = e1000e_mac_read_clr4,
[ITR] = e1000e_mac_itr_read,
[RDFT] = E1000E_LOW_BITS_READ(13),
[RDFTS] = E1000E_LOW_BITS_READ(13),
[TDFPC] = E1000E_LOW_BITS_READ(13),
[TDFT] = E1000E_LOW_BITS_READ(13),
[TDFTS] = E1000E_LOW_BITS_READ(13),
[CTRL] = e1000e_get_ctrl,
[TARC1] = e1000e_get_tarc,
[SWSM] = e1000e_mac_swsm_read,
[IMS] = e1000e_mac_ims_read,
[CRCERRS ... MPC] = e1000e_mac_readreg,
[IP6AT ... IP6AT + 3] = e1000e_mac_readreg,
[IP4AT ... IP4AT + 6] = e1000e_mac_readreg,
[RA ... RA + 31] = e1000e_mac_readreg,
[WUPM ... WUPM + 31] = e1000e_mac_readreg,
[MTA ... MTA + 127] = e1000e_mac_readreg,
[VFTA ... VFTA + 127] = e1000e_mac_readreg,
[FFMT ... FFMT + 254] = E1000E_LOW_BITS_READ(4),
[FFVT ... FFVT + 254] = e1000e_mac_readreg,
[MDEF ... MDEF + 7] = e1000e_mac_readreg,
[FFLT ... FFLT + 10] = E1000E_LOW_BITS_READ(11),
[FTFT ... FTFT + 254] = e1000e_mac_readreg,
[PBM ... PBM + 10239] = e1000e_mac_readreg,
[RETA ... RETA + 31] = e1000e_mac_readreg,
[RSSRK ... RSSRK + 31] = e1000e_mac_readreg,
[MAVTV0 ... MAVTV3] = e1000e_mac_readreg,
[EITR...EITR + E1000E_MSIX_VEC_NUM - 1] = e1000e_mac_eitr_read
};
enum { E1000E_NREADOPS = ARRAY_SIZE(e1000e_macreg_readops) };
#define e1000e_putreg(x) [x] = e1000e_mac_writereg
static void (*e1000e_macreg_writeops[])(E1000ECore *, int, uint32_t) = {
e1000e_putreg(PBA),
e1000e_putreg(SWSM),
e1000e_putreg(WUFC),
e1000e_putreg(RDBAH1),
e1000e_putreg(TDBAH),
e1000e_putreg(TXDCTL),
e1000e_putreg(RDBAH0),
e1000e_putreg(LEDCTL),
e1000e_putreg(FCAL),
e1000e_putreg(FCRUC),
e1000e_putreg(AIT),
e1000e_putreg(TDFH),
e1000e_putreg(TDFT),
e1000e_putreg(TDFHS),
e1000e_putreg(TDFTS),
e1000e_putreg(TDFPC),
e1000e_putreg(WUC),
e1000e_putreg(WUS),
e1000e_putreg(RDFH),
e1000e_putreg(RDFT),
e1000e_putreg(RDFHS),
e1000e_putreg(RDFTS),
e1000e_putreg(RDFPC),
e1000e_putreg(IPAV),
e1000e_putreg(TDBAH1),
e1000e_putreg(TIMINCA),
e1000e_putreg(IAM),
e1000e_putreg(EIAC),
e1000e_putreg(IVAR),
e1000e_putreg(TARC0),
e1000e_putreg(TARC1),
e1000e_putreg(FLSWDATA),
e1000e_putreg(POEMB),
e1000e_putreg(PBS),
e1000e_putreg(MFUTP01),
e1000e_putreg(MFUTP23),
e1000e_putreg(MANC),
e1000e_putreg(MANC2H),
e1000e_putreg(MFVAL),
e1000e_putreg(EXTCNF_CTRL),
e1000e_putreg(FACTPS),
e1000e_putreg(FUNCTAG),
e1000e_putreg(GSCL_1),
e1000e_putreg(GSCL_2),
e1000e_putreg(GSCL_3),
e1000e_putreg(GSCL_4),
e1000e_putreg(GSCN_0),
e1000e_putreg(GSCN_1),
e1000e_putreg(GSCN_2),
e1000e_putreg(GSCN_3),
e1000e_putreg(GCR2),
e1000e_putreg(MRQC),
e1000e_putreg(FLOP),
e1000e_putreg(FLOL),
e1000e_putreg(FLSWCTL),
e1000e_putreg(FLSWCNT),
e1000e_putreg(FLA),
e1000e_putreg(RXDCTL1),
e1000e_putreg(TXDCTL1),
e1000e_putreg(TIPG),
e1000e_putreg(RXSTMPH),
e1000e_putreg(RXSTMPL),
e1000e_putreg(RXSATRL),
e1000e_putreg(RXSATRH),
e1000e_putreg(TXSTMPL),
e1000e_putreg(TXSTMPH),
e1000e_putreg(SYSTIML),
e1000e_putreg(SYSTIMH),
e1000e_putreg(TIMADJL),
e1000e_putreg(TIMADJH),
e1000e_putreg(RXUDP),
e1000e_putreg(RXCFGL),
e1000e_putreg(TSYNCRXCTL),
e1000e_putreg(TSYNCTXCTL),
e1000e_putreg(FLSWDATA),
e1000e_putreg(EXTCNF_SIZE),
e1000e_putreg(EEMNGCTL),
e1000e_putreg(RA),
[TDH1] = e1000e_set_16bit,
[TDT1] = e1000e_set_tdt,
[TCTL] = e1000e_set_tctl,
[TDT] = e1000e_set_tdt,
[MDIC] = e1000e_set_mdic,
[ICS] = e1000e_set_ics,
[TDH] = e1000e_set_16bit,
[RDH0] = e1000e_set_16bit,
[RDT0] = e1000e_set_rdt,
[IMC] = e1000e_set_imc,
[IMS] = e1000e_set_ims,
[ICR] = e1000e_set_icr,
[EECD] = e1000e_set_eecd,
[RCTL] = e1000e_set_rx_control,
[CTRL] = e1000e_set_ctrl,
[RDTR] = e1000e_set_rdtr,
[RADV] = e1000e_set_16bit,
[TADV] = e1000e_set_16bit,
[ITR] = e1000e_set_itr,
[EERD] = e1000e_set_eerd,
[GCR] = e1000e_set_gcr,
[PSRCTL] = e1000e_set_psrctl,
[RXCSUM] = e1000e_set_rxcsum,
[RAID] = e1000e_set_16bit,
[RSRPD] = e1000e_set_12bit,
[TIDV] = e1000e_set_tidv,
[TDLEN1] = e1000e_set_dlen,
[TDLEN] = e1000e_set_dlen,
[RDLEN0] = e1000e_set_dlen,
[RDLEN1] = e1000e_set_dlen,
[TDBAL] = e1000e_set_dbal,
[TDBAL1] = e1000e_set_dbal,
[RDBAL0] = e1000e_set_dbal,
[RDBAL1] = e1000e_set_dbal,
[RDH1] = e1000e_set_16bit,
[RDT1] = e1000e_set_rdt,
[STATUS] = e1000e_set_status,
[PBACLR] = e1000e_set_pbaclr,
[CTRL_EXT] = e1000e_set_ctrlext,
[FCAH] = e1000e_set_16bit,
[FCT] = e1000e_set_16bit,
[FCTTV] = e1000e_set_16bit,
[FCRTV] = e1000e_set_16bit,
[FCRTH] = e1000e_set_fcrth,
[FCRTL] = e1000e_set_fcrtl,
[VET] = e1000e_set_vet,
[RXDCTL] = e1000e_set_rxdctl,
[FLASHT] = e1000e_set_16bit,
[EEWR] = e1000e_set_eewr,
[CTRL_DUP] = e1000e_set_ctrl,
[RFCTL] = e1000e_set_rfctl,
[RA + 1] = e1000e_mac_setmacaddr,
[IP6AT ... IP6AT + 3] = e1000e_mac_writereg,
[IP4AT ... IP4AT + 6] = e1000e_mac_writereg,
[RA + 2 ... RA + 31] = e1000e_mac_writereg,
[WUPM ... WUPM + 31] = e1000e_mac_writereg,
[MTA ... MTA + 127] = e1000e_mac_writereg,
[VFTA ... VFTA + 127] = e1000e_mac_writereg,
[FFMT ... FFMT + 254] = e1000e_mac_writereg,
[FFVT ... FFVT + 254] = e1000e_mac_writereg,
[PBM ... PBM + 10239] = e1000e_mac_writereg,
[MDEF ... MDEF + 7] = e1000e_mac_writereg,
[FFLT ... FFLT + 10] = e1000e_mac_writereg,
[FTFT ... FTFT + 254] = e1000e_mac_writereg,
[RETA ... RETA + 31] = e1000e_mac_writereg,
[RSSRK ... RSSRK + 31] = e1000e_mac_writereg,
[MAVTV0 ... MAVTV3] = e1000e_mac_writereg,
[EITR...EITR + E1000E_MSIX_VEC_NUM - 1] = e1000e_set_eitr
};
enum { E1000E_NWRITEOPS = ARRAY_SIZE(e1000e_macreg_writeops) };
enum { MAC_ACCESS_PARTIAL = 1 };
/* The array below combines alias offsets of the index values for the
* MAC registers that have aliases, with the indication of not fully
* implemented registers (lowest bit). This combination is possible
* because all of the offsets are even. */
static const uint16_t mac_reg_access[E1000E_MAC_SIZE] = {
/* Alias index offsets */
[FCRTL_A] = 0x07fe, [FCRTH_A] = 0x0802,
[RDH0_A] = 0x09bc, [RDT0_A] = 0x09bc, [RDTR_A] = 0x09c6,
[RDFH_A] = 0xe904, [RDFT_A] = 0xe904,
[TDH_A] = 0x0cf8, [TDT_A] = 0x0cf8, [TIDV_A] = 0x0cf8,
[TDFH_A] = 0xed00, [TDFT_A] = 0xed00,
[RA_A ... RA_A + 31] = 0x14f0,
[VFTA_A ... VFTA_A + 127] = 0x1400,
[RDBAL0_A ... RDLEN0_A] = 0x09bc,
[TDBAL_A ... TDLEN_A] = 0x0cf8,
/* Access options */
[RDFH] = MAC_ACCESS_PARTIAL, [RDFT] = MAC_ACCESS_PARTIAL,
[RDFHS] = MAC_ACCESS_PARTIAL, [RDFTS] = MAC_ACCESS_PARTIAL,
[RDFPC] = MAC_ACCESS_PARTIAL,
[TDFH] = MAC_ACCESS_PARTIAL, [TDFT] = MAC_ACCESS_PARTIAL,
[TDFHS] = MAC_ACCESS_PARTIAL, [TDFTS] = MAC_ACCESS_PARTIAL,
[TDFPC] = MAC_ACCESS_PARTIAL, [EECD] = MAC_ACCESS_PARTIAL,
[PBM] = MAC_ACCESS_PARTIAL, [FLA] = MAC_ACCESS_PARTIAL,
[FCAL] = MAC_ACCESS_PARTIAL, [FCAH] = MAC_ACCESS_PARTIAL,
[FCT] = MAC_ACCESS_PARTIAL, [FCTTV] = MAC_ACCESS_PARTIAL,
[FCRTV] = MAC_ACCESS_PARTIAL, [FCRTL] = MAC_ACCESS_PARTIAL,
[FCRTH] = MAC_ACCESS_PARTIAL, [TXDCTL] = MAC_ACCESS_PARTIAL,
[TXDCTL1] = MAC_ACCESS_PARTIAL,
[MAVTV0 ... MAVTV3] = MAC_ACCESS_PARTIAL
};
void
e1000e_core_write(E1000ECore *core, hwaddr addr, uint64_t val, unsigned size)
{
uint16_t index = e1000e_get_reg_index_with_offset(mac_reg_access, addr);
if (index < E1000E_NWRITEOPS && e1000e_macreg_writeops[index]) {
if (mac_reg_access[index] & MAC_ACCESS_PARTIAL) {
trace_e1000e_wrn_regs_write_trivial(index << 2);
}
trace_e1000e_core_write(index << 2, size, val);
e1000e_macreg_writeops[index](core, index, val);
} else if (index < E1000E_NREADOPS && e1000e_macreg_readops[index]) {
trace_e1000e_wrn_regs_write_ro(index << 2, size, val);
} else {
trace_e1000e_wrn_regs_write_unknown(index << 2, size, val);
}
}
uint64_t
e1000e_core_read(E1000ECore *core, hwaddr addr, unsigned size)
{
uint64_t val;
uint16_t index = e1000e_get_reg_index_with_offset(mac_reg_access, addr);
if (index < E1000E_NREADOPS && e1000e_macreg_readops[index]) {
if (mac_reg_access[index] & MAC_ACCESS_PARTIAL) {
trace_e1000e_wrn_regs_read_trivial(index << 2);
}
val = e1000e_macreg_readops[index](core, index);
trace_e1000e_core_read(index << 2, size, val);
return val;
} else {
trace_e1000e_wrn_regs_read_unknown(index << 2, size);
}
return 0;
}
static inline void
e1000e_autoneg_pause(E1000ECore *core)
{
timer_del(core->autoneg_timer);
}
static void
e1000e_autoneg_resume(E1000ECore *core)
{
if (e1000e_have_autoneg(core) &&
!(core->phy[0][PHY_STATUS] & MII_SR_AUTONEG_COMPLETE)) {
qemu_get_queue(core->owner_nic)->link_down = false;
timer_mod(core->autoneg_timer,
qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 500);
}
}
static void
e1000e_vm_state_change(void *opaque, int running, RunState state)
{
E1000ECore *core = opaque;
if (running) {
trace_e1000e_vm_state_running();
e1000e_intrmgr_resume(core);
e1000e_autoneg_resume(core);
} else {
trace_e1000e_vm_state_stopped();
e1000e_autoneg_pause(core);
e1000e_intrmgr_pause(core);
}
}
void
e1000e_core_pci_realize(E1000ECore *core,
const uint16_t *eeprom_templ,
uint32_t eeprom_size,
const uint8_t *macaddr)
{
int i;
core->autoneg_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
e1000e_autoneg_timer, core);
e1000e_intrmgr_pci_realize(core);
core->vmstate =
qemu_add_vm_change_state_handler(e1000e_vm_state_change, core);
for (i = 0; i < E1000E_NUM_QUEUES; i++) {
net_tx_pkt_init(&core->tx[i].tx_pkt, core->owner,
E1000E_MAX_TX_FRAGS, core->has_vnet);
}
net_rx_pkt_init(&core->rx_pkt, core->has_vnet);
e1000x_core_prepare_eeprom(core->eeprom,
eeprom_templ,
eeprom_size,
PCI_DEVICE_GET_CLASS(core->owner)->device_id,
macaddr);
e1000e_update_rx_offloads(core);
}
void
e1000e_core_pci_uninit(E1000ECore *core)
{
int i;
timer_del(core->autoneg_timer);
timer_free(core->autoneg_timer);
e1000e_intrmgr_pci_unint(core);
qemu_del_vm_change_state_handler(core->vmstate);
for (i = 0; i < E1000E_NUM_QUEUES; i++) {
net_tx_pkt_reset(core->tx[i].tx_pkt);
net_tx_pkt_uninit(core->tx[i].tx_pkt);
}
net_rx_pkt_uninit(core->rx_pkt);
}
static const uint16_t
e1000e_phy_reg_init[E1000E_PHY_PAGES][E1000E_PHY_PAGE_SIZE] = {
[0] = {
[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 |
MII_SR_AUTONEG_CAPS |
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] = E1000_PHY_ID2_82574x,
[PHY_AUTONEG_ADV] = 0xde1,
[PHY_LP_ABILITY] = 0x7e0,
[PHY_AUTONEG_EXP] = BIT(2),
[PHY_NEXT_PAGE_TX] = BIT(0) | BIT(13),
[PHY_1000T_CTRL] = BIT(8) | BIT(9) | BIT(10) | BIT(11),
[PHY_1000T_STATUS] = 0x3c00,
[PHY_EXT_STATUS] = BIT(12) | BIT(13),
[PHY_COPPER_CTRL1] = BIT(5) | BIT(6) | BIT(8) | BIT(9) |
BIT(12) | BIT(13),
[PHY_COPPER_STAT1] = BIT(3) | BIT(10) | BIT(11) | BIT(13) | BIT(15)
},
[2] = {
[PHY_MAC_CTRL1] = BIT(3) | BIT(7),
[PHY_MAC_CTRL2] = BIT(1) | BIT(2) | BIT(6) | BIT(12)
},
[3] = {
[PHY_LED_TIMER_CTRL] = BIT(0) | BIT(2) | BIT(14)
}
};
static const uint32_t e1000e_mac_reg_init[] = {
[PBA] = 0x00140014,
[LEDCTL] = BIT(1) | BIT(8) | BIT(9) | BIT(15) | BIT(17) | BIT(18),
[EXTCNF_CTRL] = BIT(3),
[EEMNGCTL] = BIT(31),
[FLASHT] = 0x2,
[FLSWCTL] = BIT(30) | BIT(31),
[FLOL] = BIT(0),
[RXDCTL] = BIT(16),
[RXDCTL1] = BIT(16),
[TIPG] = 0x8 | (0x8 << 10) | (0x6 << 20),
[RXCFGL] = 0x88F7,
[RXUDP] = 0x319,
[CTRL] = E1000_CTRL_FD | E1000_CTRL_SWDPIN2 | E1000_CTRL_SWDPIN0 |
E1000_CTRL_SPD_1000 | E1000_CTRL_SLU |
E1000_CTRL_ADVD3WUC,
[STATUS] = E1000_STATUS_ASDV_1000 | E1000_STATUS_LU,
[PSRCTL] = (2 << E1000_PSRCTL_BSIZE0_SHIFT) |
(4 << E1000_PSRCTL_BSIZE1_SHIFT) |
(4 << E1000_PSRCTL_BSIZE2_SHIFT),
[TARC0] = 0x3 | E1000_TARC_ENABLE,
[TARC1] = 0x3 | E1000_TARC_ENABLE,
[EECD] = E1000_EECD_AUTO_RD | E1000_EECD_PRES,
[EERD] = E1000_EERW_DONE,
[EEWR] = E1000_EERW_DONE,
[GCR] = E1000_L0S_ADJUST |
E1000_L1_ENTRY_LATENCY_MSB |
E1000_L1_ENTRY_LATENCY_LSB,
[TDFH] = 0x600,
[TDFT] = 0x600,
[TDFHS] = 0x600,
[TDFTS] = 0x600,
[POEMB] = 0x30D,
[PBS] = 0x028,
[MANC] = E1000_MANC_DIS_IP_CHK_ARP,
[FACTPS] = E1000_FACTPS_LAN0_ON | 0x20000000,
[SWSM] = 1,
[RXCSUM] = E1000_RXCSUM_IPOFLD | E1000_RXCSUM_TUOFLD,
[ITR] = E1000E_MIN_XITR,
[EITR...EITR + E1000E_MSIX_VEC_NUM - 1] = E1000E_MIN_XITR,
};
void
e1000e_core_reset(E1000ECore *core)
{
int i;
timer_del(core->autoneg_timer);
e1000e_intrmgr_reset(core);
memset(core->phy, 0, sizeof core->phy);
memmove(core->phy, e1000e_phy_reg_init, sizeof e1000e_phy_reg_init);
memset(core->mac, 0, sizeof core->mac);
memmove(core->mac, e1000e_mac_reg_init, sizeof e1000e_mac_reg_init);
core->rxbuf_min_shift = 1 + E1000_RING_DESC_LEN_SHIFT;
if (qemu_get_queue(core->owner_nic)->link_down) {
e1000e_link_down(core);
}
e1000x_reset_mac_addr(core->owner_nic, core->mac, core->permanent_mac);
for (i = 0; i < ARRAY_SIZE(core->tx); i++) {
net_tx_pkt_reset(core->tx[i].tx_pkt);
memset(&core->tx[i].props, 0, sizeof(core->tx[i].props));
core->tx[i].skip_cp = false;
}
}
void e1000e_core_pre_save(E1000ECore *core)
{
int i;
NetClientState *nc = qemu_get_queue(core->owner_nic);
/*
* 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 && e1000e_have_autoneg(core)) {
core->phy[0][PHY_STATUS] |= MII_SR_AUTONEG_COMPLETE;
e1000e_update_flowctl_status(core);
}
for (i = 0; i < ARRAY_SIZE(core->tx); i++) {
if (net_tx_pkt_has_fragments(core->tx[i].tx_pkt)) {
core->tx[i].skip_cp = true;
}
}
}
int
e1000e_core_post_load(E1000ECore *core)
{
NetClientState *nc = qemu_get_queue(core->owner_nic);
/* nc.link_down can't be migrated, so infer link_down according
* to link status bit in core.mac[STATUS].
*/
nc->link_down = (core->mac[STATUS] & E1000_STATUS_LU) == 0;
return 0;
}
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