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linux/drivers/net/sfc/falcon_xmac.c
Ben Hutchings d3245b28ef sfc: Refactor link configuration 
Refactor PHY, MAC and NIC configuration operations so that the
existing link configuration can be re-pushed with:

	efx->phy_op->reconfigure(efx);
	efx->mac_op->reconfigure(efx);

and a new configuration with:

	efx->nic_op->reconfigure_port(efx);

(plus locking and error-checking).

We have not held the link settings in software (aside from flow
control), and have relied on asking the hardware what they are.  This
is a problem because in some cases the hardware may no longer be in a
state to tell us.  In particular, if an entire multi-port board is
reset through one port, the driver bindings to other ports have no
chance to save settings before recovering.

We only actually need to keep track of the autonegotiation settings,
so add an ethtool advertising mask to struct efx_nic, initialise it
in PHY init and update it as necessary.

Remove now-unneeded uses of efx_phy_op::{get,set}_settings() and
struct ethtool_cmd.

Much of this was done by Steve Hodgson <shodgson@solarflare.com>.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-29 16:46:28 -08:00

369 lines
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/****************************************************************************
* Driver for Solarflare Solarstorm network controllers and boards
* Copyright 2005-2006 Fen Systems Ltd.
* Copyright 2006-2008 Solarflare Communications Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, incorporated herein by reference.
*/
#include <linux/delay.h>
#include "net_driver.h"
#include "efx.h"
#include "falcon.h"
#include "regs.h"
#include "io.h"
#include "mac.h"
#include "mdio_10g.h"
#include "phy.h"
#include "workarounds.h"
/**************************************************************************
*
* MAC operations
*
*************************************************************************/
/* Configure the XAUI driver that is an output from Falcon */
static void falcon_setup_xaui(struct efx_nic *efx)
{
efx_oword_t sdctl, txdrv;
/* Move the XAUI into low power, unless there is no PHY, in
* which case the XAUI will have to drive a cable. */
if (efx->phy_type == PHY_TYPE_NONE)
return;
efx_reado(efx, &sdctl, FR_AB_XX_SD_CTL);
EFX_SET_OWORD_FIELD(sdctl, FRF_AB_XX_HIDRVD, FFE_AB_XX_SD_CTL_DRV_DEF);
EFX_SET_OWORD_FIELD(sdctl, FRF_AB_XX_LODRVD, FFE_AB_XX_SD_CTL_DRV_DEF);
EFX_SET_OWORD_FIELD(sdctl, FRF_AB_XX_HIDRVC, FFE_AB_XX_SD_CTL_DRV_DEF);
EFX_SET_OWORD_FIELD(sdctl, FRF_AB_XX_LODRVC, FFE_AB_XX_SD_CTL_DRV_DEF);
EFX_SET_OWORD_FIELD(sdctl, FRF_AB_XX_HIDRVB, FFE_AB_XX_SD_CTL_DRV_DEF);
EFX_SET_OWORD_FIELD(sdctl, FRF_AB_XX_LODRVB, FFE_AB_XX_SD_CTL_DRV_DEF);
EFX_SET_OWORD_FIELD(sdctl, FRF_AB_XX_HIDRVA, FFE_AB_XX_SD_CTL_DRV_DEF);
EFX_SET_OWORD_FIELD(sdctl, FRF_AB_XX_LODRVA, FFE_AB_XX_SD_CTL_DRV_DEF);
efx_writeo(efx, &sdctl, FR_AB_XX_SD_CTL);
EFX_POPULATE_OWORD_8(txdrv,
FRF_AB_XX_DEQD, FFE_AB_XX_TXDRV_DEQ_DEF,
FRF_AB_XX_DEQC, FFE_AB_XX_TXDRV_DEQ_DEF,
FRF_AB_XX_DEQB, FFE_AB_XX_TXDRV_DEQ_DEF,
FRF_AB_XX_DEQA, FFE_AB_XX_TXDRV_DEQ_DEF,
FRF_AB_XX_DTXD, FFE_AB_XX_TXDRV_DTX_DEF,
FRF_AB_XX_DTXC, FFE_AB_XX_TXDRV_DTX_DEF,
FRF_AB_XX_DTXB, FFE_AB_XX_TXDRV_DTX_DEF,
FRF_AB_XX_DTXA, FFE_AB_XX_TXDRV_DTX_DEF);
efx_writeo(efx, &txdrv, FR_AB_XX_TXDRV_CTL);
}
int falcon_reset_xaui(struct efx_nic *efx)
{
struct falcon_nic_data *nic_data = efx->nic_data;
efx_oword_t reg;
int count;
/* Don't fetch MAC statistics over an XMAC reset */
WARN_ON(nic_data->stats_disable_count == 0);
/* Start reset sequence */
EFX_POPULATE_OWORD_1(reg, FRF_AB_XX_RST_XX_EN, 1);
efx_writeo(efx, &reg, FR_AB_XX_PWR_RST);
/* Wait up to 10 ms for completion, then reinitialise */
for (count = 0; count < 1000; count++) {
efx_reado(efx, &reg, FR_AB_XX_PWR_RST);
if (EFX_OWORD_FIELD(reg, FRF_AB_XX_RST_XX_EN) == 0 &&
EFX_OWORD_FIELD(reg, FRF_AB_XX_SD_RST_ACT) == 0) {
falcon_setup_xaui(efx);
return 0;
}
udelay(10);
}
EFX_ERR(efx, "timed out waiting for XAUI/XGXS reset\n");
return -ETIMEDOUT;
}
static void falcon_mask_status_intr(struct efx_nic *efx, bool enable)
{
efx_oword_t reg;
if ((efx_nic_rev(efx) != EFX_REV_FALCON_B0) || LOOPBACK_INTERNAL(efx))
return;
/* We expect xgmii faults if the wireside link is up */
if (!EFX_WORKAROUND_5147(efx) || !efx->link_state.up)
return;
/* We can only use this interrupt to signal the negative edge of
* xaui_align [we have to poll the positive edge]. */
if (efx->xmac_poll_required)
return;
/* Flush the ISR */
if (enable)
efx_reado(efx, &reg, FR_AB_XM_MGT_INT_MSK);
EFX_POPULATE_OWORD_2(reg,
FRF_AB_XM_MSK_RMTFLT, !enable,
FRF_AB_XM_MSK_LCLFLT, !enable);
efx_writeo(efx, &reg, FR_AB_XM_MGT_INT_MASK);
}
/* Get status of XAUI link */
static bool falcon_xaui_link_ok(struct efx_nic *efx)
{
efx_oword_t reg;
bool align_done, link_ok = false;
int sync_status;
if (LOOPBACK_INTERNAL(efx))
return true;
/* Read link status */
efx_reado(efx, &reg, FR_AB_XX_CORE_STAT);
align_done = EFX_OWORD_FIELD(reg, FRF_AB_XX_ALIGN_DONE);
sync_status = EFX_OWORD_FIELD(reg, FRF_AB_XX_SYNC_STAT);
if (align_done && (sync_status == FFE_AB_XX_STAT_ALL_LANES))
link_ok = true;
/* Clear link status ready for next read */
EFX_SET_OWORD_FIELD(reg, FRF_AB_XX_COMMA_DET, FFE_AB_XX_STAT_ALL_LANES);
EFX_SET_OWORD_FIELD(reg, FRF_AB_XX_CHAR_ERR, FFE_AB_XX_STAT_ALL_LANES);
EFX_SET_OWORD_FIELD(reg, FRF_AB_XX_DISPERR, FFE_AB_XX_STAT_ALL_LANES);
efx_writeo(efx, &reg, FR_AB_XX_CORE_STAT);
/* If the link is up, then check the phy side of the xaui link */
if (efx->link_state.up && link_ok)
if (efx->phy_op->mmds & (1 << MDIO_MMD_PHYXS))
link_ok = efx_mdio_phyxgxs_lane_sync(efx);
return link_ok;
}
void falcon_reconfigure_xmac_core(struct efx_nic *efx)
{
unsigned int max_frame_len;
efx_oword_t reg;
bool rx_fc = !!(efx->link_state.fc & EFX_FC_RX);
bool tx_fc = !!(efx->link_state.fc & EFX_FC_TX);
/* Configure MAC - cut-thru mode is hard wired on */
EFX_POPULATE_OWORD_3(reg,
FRF_AB_XM_RX_JUMBO_MODE, 1,
FRF_AB_XM_TX_STAT_EN, 1,
FRF_AB_XM_RX_STAT_EN, 1);
efx_writeo(efx, &reg, FR_AB_XM_GLB_CFG);
/* Configure TX */
EFX_POPULATE_OWORD_6(reg,
FRF_AB_XM_TXEN, 1,
FRF_AB_XM_TX_PRMBL, 1,
FRF_AB_XM_AUTO_PAD, 1,
FRF_AB_XM_TXCRC, 1,
FRF_AB_XM_FCNTL, tx_fc,
FRF_AB_XM_IPG, 0x3);
efx_writeo(efx, &reg, FR_AB_XM_TX_CFG);
/* Configure RX */
EFX_POPULATE_OWORD_5(reg,
FRF_AB_XM_RXEN, 1,
FRF_AB_XM_AUTO_DEPAD, 0,
FRF_AB_XM_ACPT_ALL_MCAST, 1,
FRF_AB_XM_ACPT_ALL_UCAST, efx->promiscuous,
FRF_AB_XM_PASS_CRC_ERR, 1);
efx_writeo(efx, &reg, FR_AB_XM_RX_CFG);
/* Set frame length */
max_frame_len = EFX_MAX_FRAME_LEN(efx->net_dev->mtu);
EFX_POPULATE_OWORD_1(reg, FRF_AB_XM_MAX_RX_FRM_SIZE, max_frame_len);
efx_writeo(efx, &reg, FR_AB_XM_RX_PARAM);
EFX_POPULATE_OWORD_2(reg,
FRF_AB_XM_MAX_TX_FRM_SIZE, max_frame_len,
FRF_AB_XM_TX_JUMBO_MODE, 1);
efx_writeo(efx, &reg, FR_AB_XM_TX_PARAM);
EFX_POPULATE_OWORD_2(reg,
FRF_AB_XM_PAUSE_TIME, 0xfffe, /* MAX PAUSE TIME */
FRF_AB_XM_DIS_FCNTL, !rx_fc);
efx_writeo(efx, &reg, FR_AB_XM_FC);
/* Set MAC address */
memcpy(&reg, &efx->net_dev->dev_addr[0], 4);
efx_writeo(efx, &reg, FR_AB_XM_ADR_LO);
memcpy(&reg, &efx->net_dev->dev_addr[4], 2);
efx_writeo(efx, &reg, FR_AB_XM_ADR_HI);
}
static void falcon_reconfigure_xgxs_core(struct efx_nic *efx)
{
efx_oword_t reg;
bool xgxs_loopback = (efx->loopback_mode == LOOPBACK_XGXS);
bool xaui_loopback = (efx->loopback_mode == LOOPBACK_XAUI);
bool xgmii_loopback = (efx->loopback_mode == LOOPBACK_XGMII);
/* XGXS block is flaky and will need to be reset if moving
* into our out of XGMII, XGXS or XAUI loopbacks. */
if (EFX_WORKAROUND_5147(efx)) {
bool old_xgmii_loopback, old_xgxs_loopback, old_xaui_loopback;
bool reset_xgxs;
efx_reado(efx, &reg, FR_AB_XX_CORE_STAT);
old_xgxs_loopback = EFX_OWORD_FIELD(reg, FRF_AB_XX_XGXS_LB_EN);
old_xgmii_loopback =
EFX_OWORD_FIELD(reg, FRF_AB_XX_XGMII_LB_EN);
efx_reado(efx, &reg, FR_AB_XX_SD_CTL);
old_xaui_loopback = EFX_OWORD_FIELD(reg, FRF_AB_XX_LPBKA);
/* The PHY driver may have turned XAUI off */
reset_xgxs = ((xgxs_loopback != old_xgxs_loopback) ||
(xaui_loopback != old_xaui_loopback) ||
(xgmii_loopback != old_xgmii_loopback));
if (reset_xgxs)
falcon_reset_xaui(efx);
}
efx_reado(efx, &reg, FR_AB_XX_CORE_STAT);
EFX_SET_OWORD_FIELD(reg, FRF_AB_XX_FORCE_SIG,
(xgxs_loopback || xaui_loopback) ?
FFE_AB_XX_FORCE_SIG_ALL_LANES : 0);
EFX_SET_OWORD_FIELD(reg, FRF_AB_XX_XGXS_LB_EN, xgxs_loopback);
EFX_SET_OWORD_FIELD(reg, FRF_AB_XX_XGMII_LB_EN, xgmii_loopback);
efx_writeo(efx, &reg, FR_AB_XX_CORE_STAT);
efx_reado(efx, &reg, FR_AB_XX_SD_CTL);
EFX_SET_OWORD_FIELD(reg, FRF_AB_XX_LPBKD, xaui_loopback);
EFX_SET_OWORD_FIELD(reg, FRF_AB_XX_LPBKC, xaui_loopback);
EFX_SET_OWORD_FIELD(reg, FRF_AB_XX_LPBKB, xaui_loopback);
EFX_SET_OWORD_FIELD(reg, FRF_AB_XX_LPBKA, xaui_loopback);
efx_writeo(efx, &reg, FR_AB_XX_SD_CTL);
}
/* Try to bring up the Falcon side of the Falcon-Phy XAUI link */
static bool falcon_check_xaui_link_up(struct efx_nic *efx, int tries)
{
bool mac_up = falcon_xaui_link_ok(efx);
if ((efx->loopback_mode == LOOPBACK_NETWORK) ||
efx_phy_mode_disabled(efx->phy_mode))
/* XAUI link is expected to be down */
return mac_up;
falcon_stop_nic_stats(efx);
while (!mac_up && tries) {
EFX_LOG(efx, "bashing xaui\n");
falcon_reset_xaui(efx);
udelay(200);
mac_up = falcon_xaui_link_ok(efx);
--tries;
}
falcon_start_nic_stats(efx);
return mac_up;
}
static bool falcon_xmac_check_fault(struct efx_nic *efx)
{
return !falcon_check_xaui_link_up(efx, 5);
}
static int falcon_reconfigure_xmac(struct efx_nic *efx)
{
falcon_mask_status_intr(efx, false);
falcon_reconfigure_xgxs_core(efx);
falcon_reconfigure_xmac_core(efx);
falcon_reconfigure_mac_wrapper(efx);
efx->xmac_poll_required = !falcon_check_xaui_link_up(efx, 5);
falcon_mask_status_intr(efx, true);
return 0;
}
static void falcon_update_stats_xmac(struct efx_nic *efx)
{
struct efx_mac_stats *mac_stats = &efx->mac_stats;
/* Update MAC stats from DMAed values */
FALCON_STAT(efx, XgRxOctets, rx_bytes);
FALCON_STAT(efx, XgRxOctetsOK, rx_good_bytes);
FALCON_STAT(efx, XgRxPkts, rx_packets);
FALCON_STAT(efx, XgRxPktsOK, rx_good);
FALCON_STAT(efx, XgRxBroadcastPkts, rx_broadcast);
FALCON_STAT(efx, XgRxMulticastPkts, rx_multicast);
FALCON_STAT(efx, XgRxUnicastPkts, rx_unicast);
FALCON_STAT(efx, XgRxUndersizePkts, rx_lt64);
FALCON_STAT(efx, XgRxOversizePkts, rx_gtjumbo);
FALCON_STAT(efx, XgRxJabberPkts, rx_bad_gtjumbo);
FALCON_STAT(efx, XgRxUndersizeFCSerrorPkts, rx_bad_lt64);
FALCON_STAT(efx, XgRxDropEvents, rx_overflow);
FALCON_STAT(efx, XgRxFCSerrorPkts, rx_bad);
FALCON_STAT(efx, XgRxAlignError, rx_align_error);
FALCON_STAT(efx, XgRxSymbolError, rx_symbol_error);
FALCON_STAT(efx, XgRxInternalMACError, rx_internal_error);
FALCON_STAT(efx, XgRxControlPkts, rx_control);
FALCON_STAT(efx, XgRxPausePkts, rx_pause);
FALCON_STAT(efx, XgRxPkts64Octets, rx_64);
FALCON_STAT(efx, XgRxPkts65to127Octets, rx_65_to_127);
FALCON_STAT(efx, XgRxPkts128to255Octets, rx_128_to_255);
FALCON_STAT(efx, XgRxPkts256to511Octets, rx_256_to_511);
FALCON_STAT(efx, XgRxPkts512to1023Octets, rx_512_to_1023);
FALCON_STAT(efx, XgRxPkts1024to15xxOctets, rx_1024_to_15xx);
FALCON_STAT(efx, XgRxPkts15xxtoMaxOctets, rx_15xx_to_jumbo);
FALCON_STAT(efx, XgRxLengthError, rx_length_error);
FALCON_STAT(efx, XgTxPkts, tx_packets);
FALCON_STAT(efx, XgTxOctets, tx_bytes);
FALCON_STAT(efx, XgTxMulticastPkts, tx_multicast);
FALCON_STAT(efx, XgTxBroadcastPkts, tx_broadcast);
FALCON_STAT(efx, XgTxUnicastPkts, tx_unicast);
FALCON_STAT(efx, XgTxControlPkts, tx_control);
FALCON_STAT(efx, XgTxPausePkts, tx_pause);
FALCON_STAT(efx, XgTxPkts64Octets, tx_64);
FALCON_STAT(efx, XgTxPkts65to127Octets, tx_65_to_127);
FALCON_STAT(efx, XgTxPkts128to255Octets, tx_128_to_255);
FALCON_STAT(efx, XgTxPkts256to511Octets, tx_256_to_511);
FALCON_STAT(efx, XgTxPkts512to1023Octets, tx_512_to_1023);
FALCON_STAT(efx, XgTxPkts1024to15xxOctets, tx_1024_to_15xx);
FALCON_STAT(efx, XgTxPkts1519toMaxOctets, tx_15xx_to_jumbo);
FALCON_STAT(efx, XgTxUndersizePkts, tx_lt64);
FALCON_STAT(efx, XgTxOversizePkts, tx_gtjumbo);
FALCON_STAT(efx, XgTxNonTcpUdpPkt, tx_non_tcpudp);
FALCON_STAT(efx, XgTxMacSrcErrPkt, tx_mac_src_error);
FALCON_STAT(efx, XgTxIpSrcErrPkt, tx_ip_src_error);
/* Update derived statistics */
mac_stats->tx_good_bytes =
(mac_stats->tx_bytes - mac_stats->tx_bad_bytes -
mac_stats->tx_control * 64);
mac_stats->rx_bad_bytes =
(mac_stats->rx_bytes - mac_stats->rx_good_bytes -
mac_stats->rx_control * 64);
}
void falcon_poll_xmac(struct efx_nic *efx)
{
if (!EFX_WORKAROUND_5147(efx) || !efx->link_state.up ||
!efx->xmac_poll_required)
return;
falcon_mask_status_intr(efx, false);
efx->xmac_poll_required = !falcon_check_xaui_link_up(efx, 1);
falcon_mask_status_intr(efx, true);
}
struct efx_mac_operations falcon_xmac_operations = {
.reconfigure = falcon_reconfigure_xmac,
.update_stats = falcon_update_stats_xmac,
.check_fault = falcon_xmac_check_fault,
};
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