static int t3b2_mac_reset(struct cmac *mac)
{
struct adapter *adap = mac->adapter;
unsigned int oft = mac->offset, store;
int idx = macidx(mac);
u32 val;
if (!macidx(mac))
t3_set_reg_field(adap, A_MPS_CFG, F_PORT0ACTIVE, 0);
else
t3_set_reg_field(adap, A_MPS_CFG, F_PORT1ACTIVE, 0);
/* Stop NIC traffic to reduce the number of TXTOGGLES */
t3_set_reg_field(adap, A_MPS_CFG, F_ENFORCEPKT, 0);
/* Ensure TX drains */
t3_set_reg_field(adap, A_XGM_TX_CFG + oft, F_TXPAUSEEN, 0);
t3_write_reg(adap, A_XGM_RESET_CTRL + oft, F_MAC_RESET_);
t3_read_reg(adap, A_XGM_RESET_CTRL + oft); /* flush */
/* Store A_TP_TX_DROP_CFG_CH0 */
t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_CFG_CH0 + idx);
store = t3_read_reg(adap, A_TP_TX_DROP_CFG_CH0 + idx);
msleep(10);
/* Change DROP_CFG to 0xc0000011 */
t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_CFG_CH0 + idx);
t3_write_reg(adap, A_TP_PIO_DATA, 0xc0000011);
/* Check for xgm Rx fifo empty */
/* Increased loop count to 1000 from 5 cover 1G and 100Mbps case */
if (t3_wait_op_done(adap, A_XGM_RX_MAX_PKT_SIZE_ERR_CNT + oft,
0x80000000, 1, 1000, 2)) {
CH_ERR(adap, "MAC %d Rx fifo drain failed\n",
macidx(mac));
return -1;
}
t3_write_reg(adap, A_XGM_RESET_CTRL + oft, 0);
t3_read_reg(adap, A_XGM_RESET_CTRL + oft); /* flush */
val = F_MAC_RESET_;
if (is_10G(adap))
val |= F_PCS_RESET_;
else if (uses_xaui(adap))
val |= F_PCS_RESET_ | F_XG2G_RESET_;
else
val |= F_RGMII_RESET_ | F_XG2G_RESET_;
t3_write_reg(adap, A_XGM_RESET_CTRL + oft, val);
t3_read_reg(adap, A_XGM_RESET_CTRL + oft); /* flush */
if ((val & F_PCS_RESET_) && adap->params.rev) {
msleep(1);
t3b_pcs_reset(mac);
}
t3_write_reg(adap, A_XGM_RX_CFG + oft,
F_DISPAUSEFRAMES | F_EN1536BFRAMES |
F_RMFCS | F_ENJUMBO | F_ENHASHMCAST);
/* Restore the DROP_CFG */
t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_CFG_CH0 + idx);
t3_write_reg(adap, A_TP_PIO_DATA, store);
if (!idx)
t3_set_reg_field(adap, A_MPS_CFG, 0, F_PORT0ACTIVE);
else
t3_set_reg_field(adap, A_MPS_CFG, 0, F_PORT1ACTIVE);
/* re-enable nic traffic */
t3_set_reg_field(adap, A_MPS_CFG, F_ENFORCEPKT, 1);
/* Set: re-enable NIC traffic */
t3_set_reg_field(adap, A_MPS_CFG, F_ENFORCEPKT, 1);
return 0;
}
int t3b2_mac_watchdog_task(struct cmac *mac)
{
int status;
unsigned int tx_tcnt, tx_xcnt;
adapter_t *adap = mac->adapter;
struct mac_stats *s = &mac->stats;
u64 tx_mcnt = s->tx_frames;
if (mac->multiport)
tx_mcnt = t3_read_reg(adap, A_XGM_STAT_TX_FRAME_LOW);
status = 0;
tx_xcnt = 1; /* By default tx_xcnt is making progress*/
tx_tcnt = mac->tx_tcnt; /* If tx_mcnt is progressing ignore tx_tcnt*/
if (tx_mcnt == mac->tx_mcnt && mac->rx_pause == s->rx_pause) {
u32 cfg, active, enforcepkt;
tx_xcnt = (G_TXSPI4SOPCNT(t3_read_reg(adap,
A_XGM_TX_SPI4_SOP_EOP_CNT +
mac->offset)));
cfg = t3_read_reg(adap, A_MPS_CFG);
active = macidx(mac) ? cfg & F_PORT1ACTIVE : cfg & F_PORT0ACTIVE;
enforcepkt = cfg & F_ENFORCEPKT;
if (active && enforcepkt && (tx_xcnt == 0)) {
t3_write_reg(adap, A_TP_PIO_ADDR,
A_TP_TX_DROP_CNT_CH0 + macidx(mac));
tx_tcnt = (G_TXDROPCNTCH0RCVD(t3_read_reg(adap,
A_TP_PIO_DATA)));
} else
goto out;
} else {
mac->toggle_cnt = 0;
goto out;
}
if ((tx_tcnt != mac->tx_tcnt) && (mac->tx_xcnt == 0)) {
if (mac->toggle_cnt > 4) {
status = 2;
goto out;
} else {
status = 1;
goto out;
}
} else {
mac->toggle_cnt = 0;
goto out;
}
out:
mac->tx_tcnt = tx_tcnt;
mac->tx_xcnt = tx_xcnt;
mac->tx_mcnt = s->tx_frames;
mac->rx_pause = s->rx_pause;
if (status == 1) {
t3_write_reg(adap, A_XGM_TX_CTRL + mac->offset, 0);
t3_read_reg(adap, A_XGM_TX_CTRL + mac->offset); /* flush */
t3_write_reg(adap, A_XGM_TX_CTRL + mac->offset, mac->txen);
t3_read_reg(adap, A_XGM_TX_CTRL + mac->offset); /* flush */
mac->toggle_cnt++;
} else if (status == 2) {
t3_mac_reset(mac, -1);
mac->toggle_cnt = 0;
}
return status;
}
/**
* t3_mac_set_mtu - set the MAC MTU
* @mac: the MAC to configure
* @mtu: the MTU
*
* Sets the MAC MTU and adjusts the FIFO PAUSE watermarks accordingly.
*/
int t3_mac_set_mtu(struct cmac *mac, unsigned int mtu)
{
int hwm, lwm, divisor;
int ipg;
unsigned int thres, v, reg;
adapter_t *adap = mac->adapter;
unsigned port_type = adap->params.vpd.port_type[macidx(mac)];
unsigned int orig_mtu=mtu;
/*
* MAX_FRAME_SIZE inludes header + FCS, mtu doesn't. The HW max
* packet size register includes header, but not FCS.
*/
mtu += 14;
if (mac->multiport)
mtu += 8; /* for preamble */
if (mtu > MAX_FRAME_SIZE - 4)
return -EINVAL;
if (mac->multiport)
return t3_vsc7323_set_mtu(adap, mtu - 4, mac->ext_port);
/* Modify the TX and RX fifo depth only if the card has a vsc8211 phy */
if (port_type == 2) {
int err = t3_vsc8211_fifo_depth(adap,orig_mtu,macidx(mac));
if (err)
return err;
}
if (adap->params.rev >= T3_REV_B2 &&
(t3_read_reg(adap, A_XGM_RX_CTRL + mac->offset) & F_RXEN)) {
t3_mac_disable_exact_filters(mac);
v = t3_read_reg(adap, A_XGM_RX_CFG + mac->offset);
t3_set_reg_field(adap, A_XGM_RX_CFG + mac->offset,
F_ENHASHMCAST | F_COPYALLFRAMES, F_DISBCAST);
reg = adap->params.rev == T3_REV_B2 ?
A_XGM_RX_MAX_PKT_SIZE_ERR_CNT : A_XGM_RXFIFO_CFG;
/* drain RX FIFO */
if (t3_wait_op_done(adap, reg + mac->offset,
F_RXFIFO_EMPTY, 1, 20, 5)) {
t3_write_reg(adap, A_XGM_RX_CFG + mac->offset, v);
t3_mac_enable_exact_filters(mac);
return -EIO;
}
t3_set_reg_field(adap, A_XGM_RX_MAX_PKT_SIZE + mac->offset,
V_RXMAXPKTSIZE(M_RXMAXPKTSIZE),
V_RXMAXPKTSIZE(mtu));
t3_write_reg(adap, A_XGM_RX_CFG + mac->offset, v);
t3_mac_enable_exact_filters(mac);
} else
t3_set_reg_field(adap, A_XGM_RX_MAX_PKT_SIZE + mac->offset,
V_RXMAXPKTSIZE(M_RXMAXPKTSIZE),
V_RXMAXPKTSIZE(mtu));
/*
* Adjust the PAUSE frame watermarks. We always set the LWM, and the
* HWM only if flow-control is enabled.
*/
hwm = rx_fifo_hwm(mtu);
lwm = min(3 * (int) mtu, MAC_RXFIFO_SIZE /4);
v = t3_read_reg(adap, A_XGM_RXFIFO_CFG + mac->offset);
v &= ~V_RXFIFOPAUSELWM(M_RXFIFOPAUSELWM);
v |= V_RXFIFOPAUSELWM(lwm / 8);
if (G_RXFIFOPAUSEHWM(v))
v = (v & ~V_RXFIFOPAUSEHWM(M_RXFIFOPAUSEHWM)) |
V_RXFIFOPAUSEHWM(hwm / 8);
t3_write_reg(adap, A_XGM_RXFIFO_CFG + mac->offset, v);
/* Adjust the TX FIFO threshold based on the MTU */
thres = (adap->params.vpd.cclk * 1000) / 15625;
thres = (thres * mtu) / 1000;
if (is_10G(adap))
thres /= 10;
thres = mtu > thres ? (mtu - thres + 7) / 8 : 0;
thres = max(thres, 8U); /* need at least 8 */
ipg = (port_type == 9 || adap->params.rev != T3_REV_C) ? 1 : 0;
t3_set_reg_field(adap, A_XGM_TXFIFO_CFG + mac->offset,
V_TXFIFOTHRESH(M_TXFIFOTHRESH) | V_TXIPG(M_TXIPG),
V_TXFIFOTHRESH(thres) | V_TXIPG(ipg));
/* Assuming a minimum drain rate of 2.5Gbps...
*/
if (adap->params.rev > 0) {
divisor = (adap->params.rev == T3_REV_C) ? 64 : 8;
t3_write_reg(adap, A_XGM_PAUSE_TIMER + mac->offset,
(hwm - lwm) * 4 / divisor);
}
t3_write_reg(adap, A_XGM_TX_PAUSE_QUANTA + mac->offset,
MAC_RXFIFO_SIZE * 4 * 8 / 512);
return 0;
}
static int t3_mac_reset(struct cmac *mac, int portspeed)
{
u32 val, store_mps;
adapter_t *adap = mac->adapter;
unsigned int oft = mac->offset;
int idx = macidx(mac);
unsigned int store;
/* Stop egress traffic to xgm*/
store_mps = t3_read_reg(adap, A_MPS_CFG);
if (!idx)
t3_set_reg_field(adap, A_MPS_CFG, F_PORT0ACTIVE, 0);
else
t3_set_reg_field(adap, A_MPS_CFG, F_PORT1ACTIVE, 0);
/* This will reduce the number of TXTOGGLES */
/* Clear: to stop the NIC traffic */
t3_set_reg_field(adap, A_MPS_CFG, F_ENFORCEPKT, 0);
/* Ensure TX drains */
t3_set_reg_field(adap, A_XGM_TX_CFG + oft, F_TXPAUSEEN, 0);
/* PCS in reset */
t3_write_reg(adap, A_XGM_RESET_CTRL + oft, F_MAC_RESET_);
(void) t3_read_reg(adap, A_XGM_RESET_CTRL + oft); /* flush */
/* Store A_TP_TX_DROP_CFG_CH0 */
t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_CFG_CH0 + idx);
store = t3_read_reg(adap, A_TP_PIO_DATA);
msleep(10);
/* Change DROP_CFG to 0xc0000011 */
t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_CFG_CH0 + idx);
t3_write_reg(adap, A_TP_PIO_DATA, 0xc0000011);
/* Check for xgm Rx fifo empty */
/* Increased loop count to 1000 from 5 cover 1G and 100Mbps case */
if (t3_wait_op_done(adap, A_XGM_RX_MAX_PKT_SIZE_ERR_CNT + oft,
0x80000000, 1, 1000, 2) && portspeed < 0) {
CH_ERR(adap, "MAC %d Rx fifo drain failed\n", idx);
return -1;
}
if (portspeed >= 0) {
u32 intr = t3_read_reg(adap, A_XGM_INT_ENABLE + oft);
/*
* safespeedchange: wipes out pretty much all XGMAC registers.
*/
t3_set_reg_field(adap, A_XGM_PORT_CFG + oft,
V_PORTSPEED(M_PORTSPEED) | F_SAFESPEEDCHANGE,
portspeed | F_SAFESPEEDCHANGE);
(void) t3_read_reg(adap, A_XGM_PORT_CFG + oft);
t3_set_reg_field(adap, A_XGM_PORT_CFG + oft,
F_SAFESPEEDCHANGE, 0);
(void) t3_read_reg(adap, A_XGM_PORT_CFG + oft);
t3_mac_init(mac);
t3_write_reg(adap, A_XGM_INT_ENABLE + oft, intr);
} else {
t3_write_reg(adap, A_XGM_RESET_CTRL + oft, 0); /*MAC in reset*/
(void) t3_read_reg(adap, A_XGM_RESET_CTRL + oft); /* flush */
val = xgm_reset_ctrl(mac);
t3_write_reg(adap, A_XGM_RESET_CTRL + oft, val);
(void) t3_read_reg(adap, A_XGM_RESET_CTRL + oft); /* flush */
if ((val & F_PCS_RESET_) && adap->params.rev) {
msleep(1);
t3b_pcs_reset(mac);
}
t3_write_reg(adap, A_XGM_RX_CFG + oft,
F_DISPAUSEFRAMES | F_EN1536BFRAMES |
F_RMFCS | F_ENJUMBO | F_ENHASHMCAST );
}
/* Restore the DROP_CFG */
t3_write_reg(adap, A_TP_PIO_ADDR, A_TP_TX_DROP_CFG_CH0 + idx);
t3_write_reg(adap, A_TP_PIO_DATA, store);
/* Resume egress traffic to xgm */
t3_set_reg_field(adap, A_MPS_CFG, F_PORT1ACTIVE | F_PORT0ACTIVE,
store_mps);
/* Set: re-enable NIC traffic */
t3_set_reg_field(adap, A_MPS_CFG, F_ENFORCEPKT, F_ENFORCEPKT);
return 0;
}
/**
* t3_mac_init - initialize a MAC
* @mac: the MAC to initialize
*
* Initialize the given MAC.
*/
int t3_mac_init(struct cmac *mac)
{
static struct addr_val_pair mac_reset_avp[] = {
{ A_XGM_TX_CTRL, 0 },
{ A_XGM_RX_CTRL, 0 },
{ A_XGM_RX_CFG, F_DISPAUSEFRAMES | F_EN1536BFRAMES |
F_RMFCS | F_ENJUMBO | F_ENHASHMCAST },
{ A_XGM_RX_HASH_LOW, 0 },
{ A_XGM_RX_HASH_HIGH, 0 },
{ A_XGM_RX_EXACT_MATCH_LOW_1, 0 },
{ A_XGM_RX_EXACT_MATCH_LOW_2, 0 },
{ A_XGM_RX_EXACT_MATCH_LOW_3, 0 },
{ A_XGM_RX_EXACT_MATCH_LOW_4, 0 },
{ A_XGM_RX_EXACT_MATCH_LOW_5, 0 },
{ A_XGM_RX_EXACT_MATCH_LOW_6, 0 },
{ A_XGM_RX_EXACT_MATCH_LOW_7, 0 },
{ A_XGM_RX_EXACT_MATCH_LOW_8, 0 },
{ A_XGM_STAT_CTRL, F_CLRSTATS }
};
u32 val;
adapter_t *adap = mac->adapter;
unsigned int oft = mac->offset;
t3_write_reg(adap, A_XGM_RESET_CTRL + oft, F_MAC_RESET_);
(void) t3_read_reg(adap, A_XGM_RESET_CTRL + oft); /* flush */
t3_write_regs(adap, mac_reset_avp, ARRAY_SIZE(mac_reset_avp), oft);
t3_set_reg_field(adap, A_XGM_RXFIFO_CFG + oft,
F_RXSTRFRWRD | F_DISERRFRAMES,
uses_xaui(adap) ? 0 : F_RXSTRFRWRD);
t3_set_reg_field(adap, A_XGM_TXFIFO_CFG + oft, 0, F_UNDERUNFIX);
if (uses_xaui(adap)) {
if (adap->params.rev == 0) {
t3_set_reg_field(adap, A_XGM_SERDES_CTRL + oft, 0,
F_RXENABLE | F_TXENABLE);
if (t3_wait_op_done(adap, A_XGM_SERDES_STATUS1 + oft,
F_CMULOCK, 1, 5, 2)) {
CH_ERR(adap,
"MAC %d XAUI SERDES CMU lock failed\n",
macidx(mac));
return -1;
}
t3_set_reg_field(adap, A_XGM_SERDES_CTRL + oft, 0,
F_SERDESRESET_);
} else
xaui_serdes_reset(mac);
}
if (mac->multiport) {
t3_write_reg(adap, A_XGM_RX_MAX_PKT_SIZE + oft,
V_RXMAXPKTSIZE(MAX_FRAME_SIZE - 4));
t3_set_reg_field(adap, A_XGM_TXFIFO_CFG + oft, 0,
F_DISPREAMBLE);
t3_set_reg_field(adap, A_XGM_RX_CFG + oft, 0, F_COPYPREAMBLE |
F_ENNON802_3PREAMBLE);
t3_set_reg_field(adap, A_XGM_TXFIFO_CFG + oft,
V_TXFIFOTHRESH(M_TXFIFOTHRESH),
V_TXFIFOTHRESH(64));
t3_write_reg(adap, A_XGM_TX_CTRL + oft, F_TXEN);
t3_write_reg(adap, A_XGM_RX_CTRL + oft, F_RXEN);
}
t3_set_reg_field(adap, A_XGM_RX_MAX_PKT_SIZE + oft,
V_RXMAXFRAMERSIZE(M_RXMAXFRAMERSIZE),
V_RXMAXFRAMERSIZE(MAX_FRAME_SIZE) | F_RXENFRAMER);
val = xgm_reset_ctrl(mac);
t3_write_reg(adap, A_XGM_RESET_CTRL + oft, val);
(void) t3_read_reg(adap, A_XGM_RESET_CTRL + oft); /* flush */
if ((val & F_PCS_RESET_) && adap->params.rev) {
msleep(1);
t3b_pcs_reset(mac);
}
memset(&mac->stats, 0, sizeof(mac->stats));
return 0;
}
int t3b2_mac_watchdog_task(struct cmac *mac)
{
struct adapter *adap = mac->adapter;
struct mac_stats *s = &mac->stats;
unsigned int tx_tcnt, tx_xcnt;
unsigned int tx_mcnt = s->tx_frames;
unsigned int rx_mcnt = s->rx_frames;
unsigned int rx_xcnt;
int status;
status = 0;
tx_xcnt = 1; /* By default tx_xcnt is making progress */
tx_tcnt = mac->tx_tcnt; /* If tx_mcnt is progressing ignore tx_tcnt */
rx_xcnt = 1; /* By default rx_xcnt is making progress */
if (tx_mcnt == mac->tx_mcnt && mac->rx_pause == s->rx_pause) {
tx_xcnt = (G_TXSPI4SOPCNT(t3_read_reg(adap,
A_XGM_TX_SPI4_SOP_EOP_CNT +
mac->offset)));
if (tx_xcnt == 0) {
t3_write_reg(adap, A_TP_PIO_ADDR,
A_TP_TX_DROP_CNT_CH0 + macidx(mac));
tx_tcnt = (G_TXDROPCNTCH0RCVD(t3_read_reg(adap,
A_TP_PIO_DATA)));
} else {
goto rxcheck;
}
} else {
mac->toggle_cnt = 0;
goto rxcheck;
}
if ((tx_tcnt != mac->tx_tcnt) && (mac->tx_xcnt == 0)) {
if (mac->toggle_cnt > 4) {
status = 2;
goto out;
} else {
status = 1;
goto out;
}
} else {
mac->toggle_cnt = 0;
goto rxcheck;
}
rxcheck:
if (rx_mcnt != mac->rx_mcnt) {
rx_xcnt = (G_TXSPI4SOPCNT(t3_read_reg(adap,
A_XGM_RX_SPI4_SOP_EOP_CNT +
mac->offset))) +
(s->rx_fifo_ovfl -
mac->rx_ocnt);
mac->rx_ocnt = s->rx_fifo_ovfl;
} else
goto out;
if (mac->rx_mcnt != s->rx_frames && rx_xcnt == 0 &&
mac->rx_xcnt == 0) {
status = 2;
goto out;
}
out:
mac->tx_tcnt = tx_tcnt;
mac->tx_xcnt = tx_xcnt;
mac->tx_mcnt = s->tx_frames;
mac->rx_xcnt = rx_xcnt;
mac->rx_mcnt = s->rx_frames;
mac->rx_pause = s->rx_pause;
if (status == 1) {
t3_write_reg(adap, A_XGM_TX_CTRL + mac->offset, 0);
t3_read_reg(adap, A_XGM_TX_CTRL + mac->offset); /* flush */
t3_write_reg(adap, A_XGM_TX_CTRL + mac->offset, mac->txen);
t3_read_reg(adap, A_XGM_TX_CTRL + mac->offset); /* flush */
mac->toggle_cnt++;
} else if (status == 2) {
t3b2_mac_reset(mac);
mac->toggle_cnt = 0;
}
return status;
}