/**************************************************************************** * Driver for Solarflare Solarstorm network controllers and boards * Copyright 2005-2006 Fen Systems Ltd. * Copyright 2006-2009 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 "nic.h" #include "regs.h" #include "io.h" #include "mac.h" #include "mdio_10g.h" #include "workarounds.h" /************************************************************************** * * MAC operations * *************************************************************************/ /* Configure the XAUI driver that is an output from Falcon */ 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, ®, FR_AB_XX_PWR_RST); /* Wait up to 10 ms for completion, then reinitialise */ for (count = 0; count < 1000; count++) { efx_reado(efx, ®, 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); } netif_err(efx, hw, efx->net_dev, "timed out waiting for XAUI/XGXS reset\n"); return -ETIMEDOUT; } static void falcon_ack_status_intr(struct efx_nic *efx) { struct falcon_nic_data *nic_data = efx->nic_data; 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 down */ 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 (nic_data->xmac_poll_required) return; efx_reado(efx, ®, FR_AB_XM_MGT_INT_MSK); } static bool falcon_xgxs_link_ok(struct efx_nic *efx) { efx_oword_t reg; bool align_done, link_ok = false; int sync_status; /* Read link status */ efx_reado(efx, ®, 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, ®, FR_AB_XX_CORE_STAT); return link_ok; } static bool falcon_xmac_link_ok(struct efx_nic *efx) { /* * Check MAC's XGXS link status except when using XGMII loopback * which bypasses the XGXS block. * If possible, check PHY's XGXS link status except when using * MAC loopback. */ return (efx->loopback_mode == LOOPBACK_XGMII || falcon_xgxs_link_ok(efx)) && (!(efx->mdio.mmds & (1 << MDIO_MMD_PHYXS)) || LOOPBACK_INTERNAL(efx) || efx_mdio_phyxgxs_lane_sync(efx)); } static 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, ®, 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, ®, 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, ®, 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, ®, 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, ®, 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, ®, FR_AB_XM_FC); /* Set MAC address */ memcpy(®, &efx->net_dev->dev_addr[0], 4); efx_writeo(efx, ®, FR_AB_XM_ADR_LO); memcpy(®, &efx->net_dev->dev_addr[4], 2); efx_writeo(efx, ®, 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, ®, 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, ®, 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, ®, 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, ®, FR_AB_XX_CORE_STAT); efx_reado(efx, ®, 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, ®, FR_AB_XX_SD_CTL); } /* Try to bring up the Falcon side of the Falcon-Phy XAUI link */ static bool falcon_xmac_link_ok_retry(struct efx_nic *efx, int tries) { bool mac_up = falcon_xmac_link_ok(efx); if (LOOPBACK_MASK(efx) & LOOPBACKS_EXTERNAL(efx) & LOOPBACKS_WS || 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) { netif_dbg(efx, hw, efx->net_dev, "bashing xaui\n"); falcon_reset_xaui(efx); udelay(200); mac_up = falcon_xmac_link_ok(efx); --tries; } falcon_start_nic_stats(efx); return mac_up; } static bool falcon_xmac_check_fault(struct efx_nic *efx) { return !falcon_xmac_link_ok_retry(efx, 5); } static int falcon_reconfigure_xmac(struct efx_nic *efx) { struct falcon_nic_data *nic_data = efx->nic_data; falcon_reconfigure_xgxs_core(efx); falcon_reconfigure_xmac_core(efx); falcon_reconfigure_mac_wrapper(efx); nic_data->xmac_poll_required = !falcon_xmac_link_ok_retry(efx, 5); falcon_ack_status_intr(efx); 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) { struct falcon_nic_data *nic_data = efx->nic_data; if (!EFX_WORKAROUND_5147(efx) || !efx->link_state.up || !nic_data->xmac_poll_required) return; nic_data->xmac_poll_required = !falcon_xmac_link_ok_retry(efx, 1); falcon_ack_status_intr(efx); } struct efx_mac_operations falcon_xmac_operations = { .reconfigure = falcon_reconfigure_xmac, .update_stats = falcon_update_stats_xmac, .check_fault = falcon_xmac_check_fault, };