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linux/drivers/net/sfc/falcon_xmac.c
Ben Hutchings d4ec09acdb sfc: Do not reinitialise XAUI serdes before it has completed reset 
falcon_reset_xaui() waits for XGXS reset to complete, but the XAUI
serdes reset may take longer.  It needs to check both reset active
bits.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-26 17:38:51 -07:00

379 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 "falcon_hwdefs.h"
#include "falcon_io.h"
#include "mac.h"
#include "mdio_10g.h"
#include "phy.h"
#include "boards.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;
falcon_read(efx, &sdctl, XX_SD_CTL_REG);
EFX_SET_OWORD_FIELD(sdctl, XX_HIDRVD, XX_SD_CTL_DRV_DEFAULT);
EFX_SET_OWORD_FIELD(sdctl, XX_LODRVD, XX_SD_CTL_DRV_DEFAULT);
EFX_SET_OWORD_FIELD(sdctl, XX_HIDRVC, XX_SD_CTL_DRV_DEFAULT);
EFX_SET_OWORD_FIELD(sdctl, XX_LODRVC, XX_SD_CTL_DRV_DEFAULT);
EFX_SET_OWORD_FIELD(sdctl, XX_HIDRVB, XX_SD_CTL_DRV_DEFAULT);
EFX_SET_OWORD_FIELD(sdctl, XX_LODRVB, XX_SD_CTL_DRV_DEFAULT);
EFX_SET_OWORD_FIELD(sdctl, XX_HIDRVA, XX_SD_CTL_DRV_DEFAULT);
EFX_SET_OWORD_FIELD(sdctl, XX_LODRVA, XX_SD_CTL_DRV_DEFAULT);
falcon_write(efx, &sdctl, XX_SD_CTL_REG);
EFX_POPULATE_OWORD_8(txdrv,
XX_DEQD, XX_TXDRV_DEQ_DEFAULT,
XX_DEQC, XX_TXDRV_DEQ_DEFAULT,
XX_DEQB, XX_TXDRV_DEQ_DEFAULT,
XX_DEQA, XX_TXDRV_DEQ_DEFAULT,
XX_DTXD, XX_TXDRV_DTX_DEFAULT,
XX_DTXC, XX_TXDRV_DTX_DEFAULT,
XX_DTXB, XX_TXDRV_DTX_DEFAULT,
XX_DTXA, XX_TXDRV_DTX_DEFAULT);
falcon_write(efx, &txdrv, XX_TXDRV_CTL_REG);
}
int falcon_reset_xaui(struct efx_nic *efx)
{
efx_oword_t reg;
int count;
/* Start reset sequence */
EFX_POPULATE_DWORD_1(reg, XX_RST_XX_EN, 1);
falcon_write(efx, &reg, XX_PWR_RST_REG);
/* Wait up to 10 ms for completion, then reinitialise */
for (count = 0; count < 1000; count++) {
falcon_read(efx, &reg, XX_PWR_RST_REG);
if (EFX_OWORD_FIELD(reg, XX_RST_XX_EN) == 0 &&
EFX_OWORD_FIELD(reg, 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 ((falcon_rev(efx) != FALCON_REV_B0) || LOOPBACK_INTERNAL(efx))
return;
/* We expect xgmii faults if the wireside link is up */
if (!EFX_WORKAROUND_5147(efx) || !efx->link_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->mac_up)
return;
/* Flush the ISR */
if (enable)
falcon_read(efx, &reg, XM_MGT_INT_REG_B0);
EFX_POPULATE_OWORD_2(reg,
XM_MSK_RMTFLT, !enable,
XM_MSK_LCLFLT, !enable);
falcon_write(efx, &reg, XM_MGT_INT_MSK_REG_B0);
}
/* Get status of XAUI link */
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 */
falcon_read(efx, &reg, XX_CORE_STAT_REG);
align_done = EFX_OWORD_FIELD(reg, XX_ALIGN_DONE);
sync_status = EFX_OWORD_FIELD(reg, XX_SYNC_STAT);
if (align_done && (sync_status == XX_SYNC_STAT_DECODE_SYNCED))
link_ok = true;
/* Clear link status ready for next read */
EFX_SET_OWORD_FIELD(reg, XX_COMMA_DET, XX_COMMA_DET_RESET);
EFX_SET_OWORD_FIELD(reg, XX_CHARERR, XX_CHARERR_RESET);
EFX_SET_OWORD_FIELD(reg, XX_DISPERR, XX_DISPERR_RESET);
falcon_write(efx, &reg, XX_CORE_STAT_REG);
/* If the link is up, then check the phy side of the xaui link */
if (efx->link_up && link_ok)
if (efx->phy_op->mmds & (1 << MDIO_MMD_PHYXS))
link_ok = efx_mdio_phyxgxs_lane_sync(efx);
return link_ok;
}
static void falcon_reconfigure_xmac_core(struct efx_nic *efx)
{
unsigned int max_frame_len;
efx_oword_t reg;
bool rx_fc = !!(efx->link_fc & EFX_FC_RX);
/* Configure MAC - cut-thru mode is hard wired on */
EFX_POPULATE_DWORD_3(reg,
XM_RX_JUMBO_MODE, 1,
XM_TX_STAT_EN, 1,
XM_RX_STAT_EN, 1);
falcon_write(efx, &reg, XM_GLB_CFG_REG);
/* Configure TX */
EFX_POPULATE_DWORD_6(reg,
XM_TXEN, 1,
XM_TX_PRMBL, 1,
XM_AUTO_PAD, 1,
XM_TXCRC, 1,
XM_FCNTL, 1,
XM_IPG, 0x3);
falcon_write(efx, &reg, XM_TX_CFG_REG);
/* Configure RX */
EFX_POPULATE_DWORD_5(reg,
XM_RXEN, 1,
XM_AUTO_DEPAD, 0,
XM_ACPT_ALL_MCAST, 1,
XM_ACPT_ALL_UCAST, efx->promiscuous,
XM_PASS_CRC_ERR, 1);
falcon_write(efx, &reg, XM_RX_CFG_REG);
/* Set frame length */
max_frame_len = EFX_MAX_FRAME_LEN(efx->net_dev->mtu);
EFX_POPULATE_DWORD_1(reg, XM_MAX_RX_FRM_SIZE, max_frame_len);
falcon_write(efx, &reg, XM_RX_PARAM_REG);
EFX_POPULATE_DWORD_2(reg,
XM_MAX_TX_FRM_SIZE, max_frame_len,
XM_TX_JUMBO_MODE, 1);
falcon_write(efx, &reg, XM_TX_PARAM_REG);
EFX_POPULATE_DWORD_2(reg,
XM_PAUSE_TIME, 0xfffe, /* MAX PAUSE TIME */
XM_DIS_FCNTL, !rx_fc);
falcon_write(efx, &reg, XM_FC_REG);
/* Set MAC address */
EFX_POPULATE_DWORD_4(reg,
XM_ADR_0, efx->net_dev->dev_addr[0],
XM_ADR_1, efx->net_dev->dev_addr[1],
XM_ADR_2, efx->net_dev->dev_addr[2],
XM_ADR_3, efx->net_dev->dev_addr[3]);
falcon_write(efx, &reg, XM_ADR_LO_REG);
EFX_POPULATE_DWORD_2(reg,
XM_ADR_4, efx->net_dev->dev_addr[4],
XM_ADR_5, efx->net_dev->dev_addr[5]);
falcon_write(efx, &reg, XM_ADR_HI_REG);
}
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;
falcon_read(efx, &reg, XX_CORE_STAT_REG);
old_xgxs_loopback = EFX_OWORD_FIELD(reg, XX_XGXS_LB_EN);
old_xgmii_loopback = EFX_OWORD_FIELD(reg, XX_XGMII_LB_EN);
falcon_read(efx, &reg, XX_SD_CTL_REG);
old_xaui_loopback = EFX_OWORD_FIELD(reg, 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);
}
falcon_read(efx, &reg, XX_CORE_STAT_REG);
EFX_SET_OWORD_FIELD(reg, XX_FORCE_SIG,
(xgxs_loopback || xaui_loopback) ?
XX_FORCE_SIG_DECODE_FORCED : 0);
EFX_SET_OWORD_FIELD(reg, XX_XGXS_LB_EN, xgxs_loopback);
EFX_SET_OWORD_FIELD(reg, XX_XGMII_LB_EN, xgmii_loopback);
falcon_write(efx, &reg, XX_CORE_STAT_REG);
falcon_read(efx, &reg, XX_SD_CTL_REG);
EFX_SET_OWORD_FIELD(reg, XX_LPBKD, xaui_loopback);
EFX_SET_OWORD_FIELD(reg, XX_LPBKC, xaui_loopback);
EFX_SET_OWORD_FIELD(reg, XX_LPBKB, xaui_loopback);
EFX_SET_OWORD_FIELD(reg, XX_LPBKA, xaui_loopback);
falcon_write(efx, &reg, XX_SD_CTL_REG);
}
/* Try and bring the Falcon side of the Falcon-Phy XAUI link fails
* to come back up. Bash it until it comes back up */
static void falcon_check_xaui_link_up(struct efx_nic *efx, int tries)
{
efx->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;
while (!efx->mac_up && tries) {
EFX_LOG(efx, "bashing xaui\n");
falcon_reset_xaui(efx);
udelay(200);
efx->mac_up = falcon_xaui_link_ok(efx);
--tries;
}
}
static void 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);
falcon_check_xaui_link_up(efx, 5);
falcon_mask_status_intr(efx, true);
}
static void falcon_update_stats_xmac(struct efx_nic *efx)
{
struct efx_mac_stats *mac_stats = &efx->mac_stats;
int rc;
rc = falcon_dma_stats(efx, XgDmaDone_offset);
if (rc)
return;
/* 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);
}
static void falcon_xmac_irq(struct efx_nic *efx)
{
/* The XGMII link has a transient fault, which indicates either:
* - there's a transient xgmii fault
* - falcon's end of the xaui link may need a kick
* - the wire-side link may have gone down, but the lasi/poll()
* hasn't noticed yet.
*
* We only want to even bother polling XAUI if we're confident it's
* not (1) or (3). In both cases, the only reliable way to spot this
* is to wait a bit. We do this here by forcing the mac link state
* to down, and waiting for the mac poll to come round and check
*/
efx->mac_up = false;
}
static void falcon_poll_xmac(struct efx_nic *efx)
{
if (!EFX_WORKAROUND_5147(efx) || !efx->link_up || efx->mac_up)
return;
falcon_mask_status_intr(efx, false);
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,
.irq = falcon_xmac_irq,
.poll = falcon_poll_xmac,
};
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