/* * Copyright (C) 2015 Cavium, Inc. * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License * as published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include "nic_reg.h" #include "nic.h" #include "thunder_bgx.h" #define DRV_NAME "thunder-BGX" #define DRV_VERSION "1.0" struct lmac { struct bgx *bgx; int dmac; u8 mac[ETH_ALEN]; bool link_up; int lmacid; /* ID within BGX */ int lmacid_bd; /* ID on board */ struct net_device netdev; struct phy_device *phydev; unsigned int last_duplex; unsigned int last_link; unsigned int last_speed; bool is_sgmii; struct delayed_work dwork; struct workqueue_struct *check_link; }; struct bgx { u8 bgx_id; u8 qlm_mode; struct lmac lmac[MAX_LMAC_PER_BGX]; int lmac_count; int lmac_type; int lane_to_sds; int use_training; void __iomem *reg_base; struct pci_dev *pdev; }; static struct bgx *bgx_vnic[MAX_BGX_THUNDER]; static int lmac_count; /* Total no of LMACs in system */ static int bgx_xaui_check_link(struct lmac *lmac); /* Supported devices */ static const struct pci_device_id bgx_id_table[] = { { PCI_DEVICE(PCI_VENDOR_ID_CAVIUM, PCI_DEVICE_ID_THUNDER_BGX) }, { 0, } /* end of table */ }; MODULE_AUTHOR("Cavium Inc"); MODULE_DESCRIPTION("Cavium Thunder BGX/MAC Driver"); MODULE_LICENSE("GPL v2"); MODULE_VERSION(DRV_VERSION); MODULE_DEVICE_TABLE(pci, bgx_id_table); /* The Cavium ThunderX network controller can *only* be found in SoCs * containing the ThunderX ARM64 CPU implementation. All accesses to the device * registers on this platform are implicitly strongly ordered with respect * to memory accesses. So writeq_relaxed() and readq_relaxed() are safe to use * with no memory barriers in this driver. The readq()/writeq() functions add * explicit ordering operation which in this case are redundant, and only * add overhead. */ /* Register read/write APIs */ static u64 bgx_reg_read(struct bgx *bgx, u8 lmac, u64 offset) { void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset; return readq_relaxed(addr); } static void bgx_reg_write(struct bgx *bgx, u8 lmac, u64 offset, u64 val) { void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset; writeq_relaxed(val, addr); } static void bgx_reg_modify(struct bgx *bgx, u8 lmac, u64 offset, u64 val) { void __iomem *addr = bgx->reg_base + ((u32)lmac << 20) + offset; writeq_relaxed(val | readq_relaxed(addr), addr); } static int bgx_poll_reg(struct bgx *bgx, u8 lmac, u64 reg, u64 mask, bool zero) { int timeout = 100; u64 reg_val; while (timeout) { reg_val = bgx_reg_read(bgx, lmac, reg); if (zero && !(reg_val & mask)) return 0; if (!zero && (reg_val & mask)) return 0; usleep_range(1000, 2000); timeout--; } return 1; } /* Return number of BGX present in HW */ unsigned bgx_get_map(int node) { int i; unsigned map = 0; for (i = 0; i < MAX_BGX_PER_CN88XX; i++) { if (bgx_vnic[(node * MAX_BGX_PER_CN88XX) + i]) map |= (1 << i); } return map; } EXPORT_SYMBOL(bgx_get_map); /* Return number of LMAC configured for this BGX */ int bgx_get_lmac_count(int node, int bgx_idx) { struct bgx *bgx; bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx]; if (bgx) return bgx->lmac_count; return 0; } EXPORT_SYMBOL(bgx_get_lmac_count); /* Returns the current link status of LMAC */ void bgx_get_lmac_link_state(int node, int bgx_idx, int lmacid, void *status) { struct bgx_link_status *link = (struct bgx_link_status *)status; struct bgx *bgx; struct lmac *lmac; bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx]; if (!bgx) return; lmac = &bgx->lmac[lmacid]; link->link_up = lmac->link_up; link->duplex = lmac->last_duplex; link->speed = lmac->last_speed; } EXPORT_SYMBOL(bgx_get_lmac_link_state); const u8 *bgx_get_lmac_mac(int node, int bgx_idx, int lmacid) { struct bgx *bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx]; if (bgx) return bgx->lmac[lmacid].mac; return NULL; } EXPORT_SYMBOL(bgx_get_lmac_mac); void bgx_set_lmac_mac(int node, int bgx_idx, int lmacid, const u8 *mac) { struct bgx *bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx]; if (!bgx) return; ether_addr_copy(bgx->lmac[lmacid].mac, mac); } EXPORT_SYMBOL(bgx_set_lmac_mac); void bgx_lmac_rx_tx_enable(int node, int bgx_idx, int lmacid, bool enable) { struct bgx *bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx]; u64 cfg; if (!bgx) return; cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG); if (enable) cfg |= CMR_PKT_RX_EN | CMR_PKT_TX_EN; else cfg &= ~(CMR_PKT_RX_EN | CMR_PKT_TX_EN); bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg); } EXPORT_SYMBOL(bgx_lmac_rx_tx_enable); static void bgx_sgmii_change_link_state(struct lmac *lmac) { struct bgx *bgx = lmac->bgx; u64 cmr_cfg; u64 port_cfg = 0; u64 misc_ctl = 0; cmr_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_CMRX_CFG); cmr_cfg &= ~CMR_EN; bgx_reg_write(bgx, lmac->lmacid, BGX_CMRX_CFG, cmr_cfg); port_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG); misc_ctl = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_PCS_MISCX_CTL); if (lmac->link_up) { misc_ctl &= ~PCS_MISC_CTL_GMX_ENO; port_cfg &= ~GMI_PORT_CFG_DUPLEX; port_cfg |= (lmac->last_duplex << 2); } else { misc_ctl |= PCS_MISC_CTL_GMX_ENO; } switch (lmac->last_speed) { case 10: port_cfg &= ~GMI_PORT_CFG_SPEED; /* speed 0 */ port_cfg |= GMI_PORT_CFG_SPEED_MSB; /* speed_msb 1 */ port_cfg &= ~GMI_PORT_CFG_SLOT_TIME; /* slottime 0 */ misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK; misc_ctl |= 50; /* samp_pt */ bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 64); bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_BURST, 0); break; case 100: port_cfg &= ~GMI_PORT_CFG_SPEED; /* speed 0 */ port_cfg &= ~GMI_PORT_CFG_SPEED_MSB; /* speed_msb 0 */ port_cfg &= ~GMI_PORT_CFG_SLOT_TIME; /* slottime 0 */ misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK; misc_ctl |= 5; /* samp_pt */ bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 64); bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_BURST, 0); break; case 1000: port_cfg |= GMI_PORT_CFG_SPEED; /* speed 1 */ port_cfg &= ~GMI_PORT_CFG_SPEED_MSB; /* speed_msb 0 */ port_cfg |= GMI_PORT_CFG_SLOT_TIME; /* slottime 1 */ misc_ctl &= ~PCS_MISC_CTL_SAMP_PT_MASK; misc_ctl |= 1; /* samp_pt */ bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_SLOT, 512); if (lmac->last_duplex) bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_BURST, 0); else bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_TXX_BURST, 8192); break; default: break; } bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_PCS_MISCX_CTL, misc_ctl); bgx_reg_write(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG, port_cfg); port_cfg = bgx_reg_read(bgx, lmac->lmacid, BGX_GMP_GMI_PRTX_CFG); /* renable lmac */ cmr_cfg |= CMR_EN; bgx_reg_write(bgx, lmac->lmacid, BGX_CMRX_CFG, cmr_cfg); } static void bgx_lmac_handler(struct net_device *netdev) { struct lmac *lmac = container_of(netdev, struct lmac, netdev); struct phy_device *phydev; int link_changed = 0; if (!lmac) return; phydev = lmac->phydev; if (!phydev->link && lmac->last_link) link_changed = -1; if (phydev->link && (lmac->last_duplex != phydev->duplex || lmac->last_link != phydev->link || lmac->last_speed != phydev->speed)) { link_changed = 1; } lmac->last_link = phydev->link; lmac->last_speed = phydev->speed; lmac->last_duplex = phydev->duplex; if (!link_changed) return; if (link_changed > 0) lmac->link_up = true; else lmac->link_up = false; if (lmac->is_sgmii) bgx_sgmii_change_link_state(lmac); else bgx_xaui_check_link(lmac); } u64 bgx_get_rx_stats(int node, int bgx_idx, int lmac, int idx) { struct bgx *bgx; bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx]; if (!bgx) return 0; if (idx > 8) lmac = 0; return bgx_reg_read(bgx, lmac, BGX_CMRX_RX_STAT0 + (idx * 8)); } EXPORT_SYMBOL(bgx_get_rx_stats); u64 bgx_get_tx_stats(int node, int bgx_idx, int lmac, int idx) { struct bgx *bgx; bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx]; if (!bgx) return 0; return bgx_reg_read(bgx, lmac, BGX_CMRX_TX_STAT0 + (idx * 8)); } EXPORT_SYMBOL(bgx_get_tx_stats); static void bgx_flush_dmac_addrs(struct bgx *bgx, int lmac) { u64 offset; while (bgx->lmac[lmac].dmac > 0) { offset = ((bgx->lmac[lmac].dmac - 1) * sizeof(u64)) + (lmac * MAX_DMAC_PER_LMAC * sizeof(u64)); bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM + offset, 0); bgx->lmac[lmac].dmac--; } } /* Configure BGX LMAC in internal loopback mode */ void bgx_lmac_internal_loopback(int node, int bgx_idx, int lmac_idx, bool enable) { struct bgx *bgx; struct lmac *lmac; u64 cfg; bgx = bgx_vnic[(node * MAX_BGX_PER_CN88XX) + bgx_idx]; if (!bgx) return; lmac = &bgx->lmac[lmac_idx]; if (lmac->is_sgmii) { cfg = bgx_reg_read(bgx, lmac_idx, BGX_GMP_PCS_MRX_CTL); if (enable) cfg |= PCS_MRX_CTL_LOOPBACK1; else cfg &= ~PCS_MRX_CTL_LOOPBACK1; bgx_reg_write(bgx, lmac_idx, BGX_GMP_PCS_MRX_CTL, cfg); } else { cfg = bgx_reg_read(bgx, lmac_idx, BGX_SPUX_CONTROL1); if (enable) cfg |= SPU_CTL_LOOPBACK; else cfg &= ~SPU_CTL_LOOPBACK; bgx_reg_write(bgx, lmac_idx, BGX_SPUX_CONTROL1, cfg); } } EXPORT_SYMBOL(bgx_lmac_internal_loopback); static int bgx_lmac_sgmii_init(struct bgx *bgx, int lmacid) { u64 cfg; bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_THRESH, 0x30); /* max packet size */ bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_RXX_JABBER, MAX_FRAME_SIZE); /* Disable frame alignment if using preamble */ cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND); if (cfg & 1) bgx_reg_write(bgx, lmacid, BGX_GMP_GMI_TXX_SGMII_CTL, 0); /* Enable lmac */ bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN); /* PCS reset */ bgx_reg_modify(bgx, lmacid, BGX_GMP_PCS_MRX_CTL, PCS_MRX_CTL_RESET); if (bgx_poll_reg(bgx, lmacid, BGX_GMP_PCS_MRX_CTL, PCS_MRX_CTL_RESET, true)) { dev_err(&bgx->pdev->dev, "BGX PCS reset not completed\n"); return -1; } /* power down, reset autoneg, autoneg enable */ cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_PCS_MRX_CTL); cfg &= ~PCS_MRX_CTL_PWR_DN; cfg |= (PCS_MRX_CTL_RST_AN | PCS_MRX_CTL_AN_EN); bgx_reg_write(bgx, lmacid, BGX_GMP_PCS_MRX_CTL, cfg); if (bgx_poll_reg(bgx, lmacid, BGX_GMP_PCS_MRX_STATUS, PCS_MRX_STATUS_AN_CPT, false)) { dev_err(&bgx->pdev->dev, "BGX AN_CPT not completed\n"); return -1; } return 0; } static int bgx_lmac_xaui_init(struct bgx *bgx, int lmacid, int lmac_type) { u64 cfg; /* Reset SPU */ bgx_reg_modify(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET); if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET, true)) { dev_err(&bgx->pdev->dev, "BGX SPU reset not completed\n"); return -1; } /* Disable LMAC */ cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG); cfg &= ~CMR_EN; bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cfg); bgx_reg_modify(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_LOW_POWER); /* Set interleaved running disparity for RXAUI */ if (bgx->lmac_type != BGX_MODE_RXAUI) bgx_reg_modify(bgx, lmacid, BGX_SPUX_MISC_CONTROL, SPU_MISC_CTL_RX_DIS); else bgx_reg_modify(bgx, lmacid, BGX_SPUX_MISC_CONTROL, SPU_MISC_CTL_RX_DIS | SPU_MISC_CTL_INTLV_RDISP); /* clear all interrupts */ cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_RX_INT); bgx_reg_write(bgx, lmacid, BGX_SMUX_RX_INT, cfg); cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_INT); bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_INT, cfg); cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT); bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg); if (bgx->use_training) { bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LP_CUP, 0x00); bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LD_CUP, 0x00); bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LD_REP, 0x00); /* training enable */ bgx_reg_modify(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL, SPU_PMD_CRTL_TRAIN_EN); } /* Append FCS to each packet */ bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_APPEND, SMU_TX_APPEND_FCS_D); /* Disable forward error correction */ cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_FEC_CONTROL); cfg &= ~SPU_FEC_CTL_FEC_EN; bgx_reg_write(bgx, lmacid, BGX_SPUX_FEC_CONTROL, cfg); /* Disable autoneg */ cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_AN_CONTROL); cfg = cfg & ~(SPU_AN_CTL_AN_EN | SPU_AN_CTL_XNP_EN); bgx_reg_write(bgx, lmacid, BGX_SPUX_AN_CONTROL, cfg); cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_AN_ADV); if (bgx->lmac_type == BGX_MODE_10G_KR) cfg |= (1 << 23); else if (bgx->lmac_type == BGX_MODE_40G_KR) cfg |= (1 << 24); else cfg &= ~((1 << 23) | (1 << 24)); cfg = cfg & (~((1ULL << 25) | (1ULL << 22) | (1ULL << 12))); bgx_reg_write(bgx, lmacid, BGX_SPUX_AN_ADV, cfg); cfg = bgx_reg_read(bgx, 0, BGX_SPU_DBG_CONTROL); cfg &= ~SPU_DBG_CTL_AN_ARB_LINK_CHK_EN; bgx_reg_write(bgx, 0, BGX_SPU_DBG_CONTROL, cfg); /* Enable lmac */ bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN); cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_CONTROL1); cfg &= ~SPU_CTL_LOW_POWER; bgx_reg_write(bgx, lmacid, BGX_SPUX_CONTROL1, cfg); cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_CTL); cfg &= ~SMU_TX_CTL_UNI_EN; cfg |= SMU_TX_CTL_DIC_EN; bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_CTL, cfg); /* take lmac_count into account */ bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_THRESH, (0x100 - 1)); /* max packet size */ bgx_reg_modify(bgx, lmacid, BGX_SMUX_RX_JABBER, MAX_FRAME_SIZE); return 0; } static int bgx_xaui_check_link(struct lmac *lmac) { struct bgx *bgx = lmac->bgx; int lmacid = lmac->lmacid; int lmac_type = bgx->lmac_type; u64 cfg; bgx_reg_modify(bgx, lmacid, BGX_SPUX_MISC_CONTROL, SPU_MISC_CTL_RX_DIS); if (bgx->use_training) { cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT); if (!(cfg & (1ull << 13))) { cfg = (1ull << 13) | (1ull << 14); bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg); cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL); cfg |= (1ull << 0); bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL, cfg); return -1; } } /* wait for PCS to come out of reset */ if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET, true)) { dev_err(&bgx->pdev->dev, "BGX SPU reset not completed\n"); return -1; } if ((lmac_type == BGX_MODE_10G_KR) || (lmac_type == BGX_MODE_XFI) || (lmac_type == BGX_MODE_40G_KR) || (lmac_type == BGX_MODE_XLAUI)) { if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_BR_STATUS1, SPU_BR_STATUS_BLK_LOCK, false)) { dev_err(&bgx->pdev->dev, "SPU_BR_STATUS_BLK_LOCK not completed\n"); return -1; } } else { if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_BX_STATUS, SPU_BX_STATUS_RX_ALIGN, false)) { dev_err(&bgx->pdev->dev, "SPU_BX_STATUS_RX_ALIGN not completed\n"); return -1; } } /* Clear rcvflt bit (latching high) and read it back */ bgx_reg_modify(bgx, lmacid, BGX_SPUX_STATUS2, SPU_STATUS2_RCVFLT); if (bgx_reg_read(bgx, lmacid, BGX_SPUX_STATUS2) & SPU_STATUS2_RCVFLT) { dev_err(&bgx->pdev->dev, "Receive fault, retry training\n"); if (bgx->use_training) { cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT); if (!(cfg & (1ull << 13))) { cfg = (1ull << 13) | (1ull << 14); bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg); cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL); cfg |= (1ull << 0); bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_CRTL, cfg); return -1; } } return -1; } /* Wait for MAC RX to be ready */ if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_RX_CTL, SMU_RX_CTL_STATUS, true)) { dev_err(&bgx->pdev->dev, "SMU RX link not okay\n"); return -1; } /* Wait for BGX RX to be idle */ if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_CTL, SMU_CTL_RX_IDLE, false)) { dev_err(&bgx->pdev->dev, "SMU RX not idle\n"); return -1; } /* Wait for BGX TX to be idle */ if (bgx_poll_reg(bgx, lmacid, BGX_SMUX_CTL, SMU_CTL_TX_IDLE, false)) { dev_err(&bgx->pdev->dev, "SMU TX not idle\n"); return -1; } if (bgx_reg_read(bgx, lmacid, BGX_SPUX_STATUS2) & SPU_STATUS2_RCVFLT) { dev_err(&bgx->pdev->dev, "Receive fault\n"); return -1; } /* Receive link is latching low. Force it high and verify it */ bgx_reg_modify(bgx, lmacid, BGX_SPUX_STATUS1, SPU_STATUS1_RCV_LNK); if (bgx_poll_reg(bgx, lmacid, BGX_SPUX_STATUS1, SPU_STATUS1_RCV_LNK, false)) { dev_err(&bgx->pdev->dev, "SPU receive link down\n"); return -1; } cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_MISC_CONTROL); cfg &= ~SPU_MISC_CTL_RX_DIS; bgx_reg_write(bgx, lmacid, BGX_SPUX_MISC_CONTROL, cfg); return 0; } static void bgx_poll_for_link(struct work_struct *work) { struct lmac *lmac; u64 link; lmac = container_of(work, struct lmac, dwork.work); /* Receive link is latching low. Force it high and verify it */ bgx_reg_modify(lmac->bgx, lmac->lmacid, BGX_SPUX_STATUS1, SPU_STATUS1_RCV_LNK); bgx_poll_reg(lmac->bgx, lmac->lmacid, BGX_SPUX_STATUS1, SPU_STATUS1_RCV_LNK, false); link = bgx_reg_read(lmac->bgx, lmac->lmacid, BGX_SPUX_STATUS1); if (link & SPU_STATUS1_RCV_LNK) { lmac->link_up = 1; if (lmac->bgx->lmac_type == BGX_MODE_XLAUI) lmac->last_speed = 40000; else lmac->last_speed = 10000; lmac->last_duplex = 1; } else { lmac->link_up = 0; lmac->last_speed = SPEED_UNKNOWN; lmac->last_duplex = DUPLEX_UNKNOWN; } if (lmac->last_link != lmac->link_up) { lmac->last_link = lmac->link_up; if (lmac->link_up) bgx_xaui_check_link(lmac); } queue_delayed_work(lmac->check_link, &lmac->dwork, HZ * 2); } static int bgx_lmac_enable(struct bgx *bgx, u8 lmacid) { struct lmac *lmac; u64 cfg; lmac = &bgx->lmac[lmacid]; lmac->bgx = bgx; if (bgx->lmac_type == BGX_MODE_SGMII) { lmac->is_sgmii = 1; if (bgx_lmac_sgmii_init(bgx, lmacid)) return -1; } else { lmac->is_sgmii = 0; if (bgx_lmac_xaui_init(bgx, lmacid, bgx->lmac_type)) return -1; } if (lmac->is_sgmii) { cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND); cfg |= ((1ull << 2) | (1ull << 1)); /* FCS and PAD */ bgx_reg_modify(bgx, lmacid, BGX_GMP_GMI_TXX_APPEND, cfg); bgx_reg_write(bgx, lmacid, BGX_GMP_GMI_TXX_MIN_PKT, 60 - 1); } else { cfg = bgx_reg_read(bgx, lmacid, BGX_SMUX_TX_APPEND); cfg |= ((1ull << 2) | (1ull << 1)); /* FCS and PAD */ bgx_reg_modify(bgx, lmacid, BGX_SMUX_TX_APPEND, cfg); bgx_reg_write(bgx, lmacid, BGX_SMUX_TX_MIN_PKT, 60 + 4); } /* Enable lmac */ bgx_reg_modify(bgx, lmacid, BGX_CMRX_CFG, CMR_EN); /* Restore default cfg, incase low level firmware changed it */ bgx_reg_write(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL, 0x03); if ((bgx->lmac_type != BGX_MODE_XFI) && (bgx->lmac_type != BGX_MODE_XLAUI) && (bgx->lmac_type != BGX_MODE_40G_KR) && (bgx->lmac_type != BGX_MODE_10G_KR)) { if (!lmac->phydev) return -ENODEV; lmac->phydev->dev_flags = 0; if (phy_connect_direct(&lmac->netdev, lmac->phydev, bgx_lmac_handler, PHY_INTERFACE_MODE_SGMII)) return -ENODEV; phy_start_aneg(lmac->phydev); } else { lmac->check_link = alloc_workqueue("check_link", WQ_UNBOUND | WQ_MEM_RECLAIM, 1); if (!lmac->check_link) return -ENOMEM; INIT_DELAYED_WORK(&lmac->dwork, bgx_poll_for_link); queue_delayed_work(lmac->check_link, &lmac->dwork, 0); } return 0; } static void bgx_lmac_disable(struct bgx *bgx, u8 lmacid) { struct lmac *lmac; u64 cmrx_cfg; lmac = &bgx->lmac[lmacid]; if (lmac->check_link) { /* Destroy work queue */ cancel_delayed_work_sync(&lmac->dwork); destroy_workqueue(lmac->check_link); } cmrx_cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_CFG); cmrx_cfg &= ~(1 << 15); bgx_reg_write(bgx, lmacid, BGX_CMRX_CFG, cmrx_cfg); bgx_flush_dmac_addrs(bgx, lmacid); if ((bgx->lmac_type != BGX_MODE_XFI) && (bgx->lmac_type != BGX_MODE_XLAUI) && (bgx->lmac_type != BGX_MODE_40G_KR) && (bgx->lmac_type != BGX_MODE_10G_KR) && lmac->phydev) phy_disconnect(lmac->phydev); lmac->phydev = NULL; } static void bgx_set_num_ports(struct bgx *bgx) { u64 lmac_count; switch (bgx->qlm_mode) { case QLM_MODE_SGMII: bgx->lmac_count = 4; bgx->lmac_type = BGX_MODE_SGMII; bgx->lane_to_sds = 0; break; case QLM_MODE_XAUI_1X4: bgx->lmac_count = 1; bgx->lmac_type = BGX_MODE_XAUI; bgx->lane_to_sds = 0xE4; break; case QLM_MODE_RXAUI_2X2: bgx->lmac_count = 2; bgx->lmac_type = BGX_MODE_RXAUI; bgx->lane_to_sds = 0xE4; break; case QLM_MODE_XFI_4X1: bgx->lmac_count = 4; bgx->lmac_type = BGX_MODE_XFI; bgx->lane_to_sds = 0; break; case QLM_MODE_XLAUI_1X4: bgx->lmac_count = 1; bgx->lmac_type = BGX_MODE_XLAUI; bgx->lane_to_sds = 0xE4; break; case QLM_MODE_10G_KR_4X1: bgx->lmac_count = 4; bgx->lmac_type = BGX_MODE_10G_KR; bgx->lane_to_sds = 0; bgx->use_training = 1; break; case QLM_MODE_40G_KR4_1X4: bgx->lmac_count = 1; bgx->lmac_type = BGX_MODE_40G_KR; bgx->lane_to_sds = 0xE4; bgx->use_training = 1; break; default: bgx->lmac_count = 0; break; } /* Check if low level firmware has programmed LMAC count * based on board type, if yes consider that otherwise * the default static values */ lmac_count = bgx_reg_read(bgx, 0, BGX_CMR_RX_LMACS) & 0x7; if (lmac_count != 4) bgx->lmac_count = lmac_count; } static void bgx_init_hw(struct bgx *bgx) { int i; bgx_set_num_ports(bgx); bgx_reg_modify(bgx, 0, BGX_CMR_GLOBAL_CFG, CMR_GLOBAL_CFG_FCS_STRIP); if (bgx_reg_read(bgx, 0, BGX_CMR_BIST_STATUS)) dev_err(&bgx->pdev->dev, "BGX%d BIST failed\n", bgx->bgx_id); /* Set lmac type and lane2serdes mapping */ for (i = 0; i < bgx->lmac_count; i++) { if (bgx->lmac_type == BGX_MODE_RXAUI) { if (i) bgx->lane_to_sds = 0x0e; else bgx->lane_to_sds = 0x04; bgx_reg_write(bgx, i, BGX_CMRX_CFG, (bgx->lmac_type << 8) | bgx->lane_to_sds); continue; } bgx_reg_write(bgx, i, BGX_CMRX_CFG, (bgx->lmac_type << 8) | (bgx->lane_to_sds + i)); bgx->lmac[i].lmacid_bd = lmac_count; lmac_count++; } bgx_reg_write(bgx, 0, BGX_CMR_TX_LMACS, bgx->lmac_count); bgx_reg_write(bgx, 0, BGX_CMR_RX_LMACS, bgx->lmac_count); /* Set the backpressure AND mask */ for (i = 0; i < bgx->lmac_count; i++) bgx_reg_modify(bgx, 0, BGX_CMR_CHAN_MSK_AND, ((1ULL << MAX_BGX_CHANS_PER_LMAC) - 1) << (i * MAX_BGX_CHANS_PER_LMAC)); /* Disable all MAC filtering */ for (i = 0; i < RX_DMAC_COUNT; i++) bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM + (i * 8), 0x00); /* Disable MAC steering (NCSI traffic) */ for (i = 0; i < RX_TRAFFIC_STEER_RULE_COUNT; i++) bgx_reg_write(bgx, 0, BGX_CMR_RX_STREERING + (i * 8), 0x00); } static void bgx_get_qlm_mode(struct bgx *bgx) { struct device *dev = &bgx->pdev->dev; int lmac_type; int train_en; /* Read LMAC0 type to figure out QLM mode * This is configured by low level firmware */ lmac_type = bgx_reg_read(bgx, 0, BGX_CMRX_CFG); lmac_type = (lmac_type >> 8) & 0x07; train_en = bgx_reg_read(bgx, 0, BGX_SPUX_BR_PMD_CRTL) & SPU_PMD_CRTL_TRAIN_EN; switch (lmac_type) { case BGX_MODE_SGMII: bgx->qlm_mode = QLM_MODE_SGMII; dev_info(dev, "BGX%d QLM mode: SGMII\n", bgx->bgx_id); break; case BGX_MODE_XAUI: bgx->qlm_mode = QLM_MODE_XAUI_1X4; dev_info(dev, "BGX%d QLM mode: XAUI\n", bgx->bgx_id); break; case BGX_MODE_RXAUI: bgx->qlm_mode = QLM_MODE_RXAUI_2X2; dev_info(dev, "BGX%d QLM mode: RXAUI\n", bgx->bgx_id); break; case BGX_MODE_XFI: if (!train_en) { bgx->qlm_mode = QLM_MODE_XFI_4X1; dev_info(dev, "BGX%d QLM mode: XFI\n", bgx->bgx_id); } else { bgx->qlm_mode = QLM_MODE_10G_KR_4X1; dev_info(dev, "BGX%d QLM mode: 10G_KR\n", bgx->bgx_id); } break; case BGX_MODE_XLAUI: if (!train_en) { bgx->qlm_mode = QLM_MODE_XLAUI_1X4; dev_info(dev, "BGX%d QLM mode: XLAUI\n", bgx->bgx_id); } else { bgx->qlm_mode = QLM_MODE_40G_KR4_1X4; dev_info(dev, "BGX%d QLM mode: 40G_KR4\n", bgx->bgx_id); } break; default: bgx->qlm_mode = QLM_MODE_SGMII; dev_info(dev, "BGX%d QLM default mode: SGMII\n", bgx->bgx_id); } } #ifdef CONFIG_ACPI static int acpi_get_mac_address(struct device *dev, struct acpi_device *adev, u8 *dst) { u8 mac[ETH_ALEN]; int ret; ret = fwnode_property_read_u8_array(acpi_fwnode_handle(adev), "mac-address", mac, ETH_ALEN); if (ret) goto out; if (!is_valid_ether_addr(mac)) { dev_err(dev, "MAC address invalid: %pM\n", mac); ret = -EINVAL; goto out; } dev_info(dev, "MAC address set to: %pM\n", mac); memcpy(dst, mac, ETH_ALEN); out: return ret; } /* Currently only sets the MAC address. */ static acpi_status bgx_acpi_register_phy(acpi_handle handle, u32 lvl, void *context, void **rv) { struct bgx *bgx = context; struct device *dev = &bgx->pdev->dev; struct acpi_device *adev; if (acpi_bus_get_device(handle, &adev)) goto out; acpi_get_mac_address(dev, adev, bgx->lmac[bgx->lmac_count].mac); SET_NETDEV_DEV(&bgx->lmac[bgx->lmac_count].netdev, dev); bgx->lmac[bgx->lmac_count].lmacid = bgx->lmac_count; out: bgx->lmac_count++; return AE_OK; } static acpi_status bgx_acpi_match_id(acpi_handle handle, u32 lvl, void *context, void **ret_val) { struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL }; struct bgx *bgx = context; char bgx_sel[5]; snprintf(bgx_sel, 5, "BGX%d", bgx->bgx_id); if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &string))) { pr_warn("Invalid link device\n"); return AE_OK; } if (strncmp(string.pointer, bgx_sel, 4)) return AE_OK; acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1, bgx_acpi_register_phy, NULL, bgx, NULL); kfree(string.pointer); return AE_CTRL_TERMINATE; } static int bgx_init_acpi_phy(struct bgx *bgx) { acpi_get_devices(NULL, bgx_acpi_match_id, bgx, (void **)NULL); return 0; } #else static int bgx_init_acpi_phy(struct bgx *bgx) { return -ENODEV; } #endif /* CONFIG_ACPI */ #if IS_ENABLED(CONFIG_OF_MDIO) static int bgx_init_of_phy(struct bgx *bgx) { struct fwnode_handle *fwn; struct device_node *node = NULL; u8 lmac = 0; device_for_each_child_node(&bgx->pdev->dev, fwn) { struct phy_device *pd; struct device_node *phy_np; const char *mac; /* Should always be an OF node. But if it is not, we * cannot handle it, so exit the loop. */ node = to_of_node(fwn); if (!node) break; mac = of_get_mac_address(node); if (mac) ether_addr_copy(bgx->lmac[lmac].mac, mac); SET_NETDEV_DEV(&bgx->lmac[lmac].netdev, &bgx->pdev->dev); bgx->lmac[lmac].lmacid = lmac; phy_np = of_parse_phandle(node, "phy-handle", 0); /* If there is no phy or defective firmware presents * this cortina phy, for which there is no driver * support, ignore it. */ if (phy_np && !of_device_is_compatible(phy_np, "cortina,cs4223-slice")) { /* Wait until the phy drivers are available */ pd = of_phy_find_device(phy_np); if (!pd) goto defer; bgx->lmac[lmac].phydev = pd; } lmac++; if (lmac == MAX_LMAC_PER_BGX) { of_node_put(node); break; } } return 0; defer: /* We are bailing out, try not to leak device reference counts * for phy devices we may have already found. */ while (lmac) { if (bgx->lmac[lmac].phydev) { put_device(&bgx->lmac[lmac].phydev->mdio.dev); bgx->lmac[lmac].phydev = NULL; } lmac--; } of_node_put(node); return -EPROBE_DEFER; } #else static int bgx_init_of_phy(struct bgx *bgx) { return -ENODEV; } #endif /* CONFIG_OF_MDIO */ static int bgx_init_phy(struct bgx *bgx) { if (!acpi_disabled) return bgx_init_acpi_phy(bgx); return bgx_init_of_phy(bgx); } static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { int err; struct device *dev = &pdev->dev; struct bgx *bgx = NULL; u8 lmac; bgx = devm_kzalloc(dev, sizeof(*bgx), GFP_KERNEL); if (!bgx) return -ENOMEM; bgx->pdev = pdev; pci_set_drvdata(pdev, bgx); err = pci_enable_device(pdev); if (err) { dev_err(dev, "Failed to enable PCI device\n"); pci_set_drvdata(pdev, NULL); return err; } err = pci_request_regions(pdev, DRV_NAME); if (err) { dev_err(dev, "PCI request regions failed 0x%x\n", err); goto err_disable_device; } /* MAP configuration registers */ bgx->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0); if (!bgx->reg_base) { dev_err(dev, "BGX: Cannot map CSR memory space, aborting\n"); err = -ENOMEM; goto err_release_regions; } bgx->bgx_id = (pci_resource_start(pdev, PCI_CFG_REG_BAR_NUM) >> 24) & 1; bgx->bgx_id += nic_get_node_id(pdev) * MAX_BGX_PER_CN88XX; bgx_vnic[bgx->bgx_id] = bgx; bgx_get_qlm_mode(bgx); err = bgx_init_phy(bgx); if (err) goto err_enable; bgx_init_hw(bgx); /* Enable all LMACs */ for (lmac = 0; lmac < bgx->lmac_count; lmac++) { err = bgx_lmac_enable(bgx, lmac); if (err) { dev_err(dev, "BGX%d failed to enable lmac%d\n", bgx->bgx_id, lmac); goto err_enable; } } return 0; err_enable: bgx_vnic[bgx->bgx_id] = NULL; err_release_regions: pci_release_regions(pdev); err_disable_device: pci_disable_device(pdev); pci_set_drvdata(pdev, NULL); return err; } static void bgx_remove(struct pci_dev *pdev) { struct bgx *bgx = pci_get_drvdata(pdev); u8 lmac; /* Disable all LMACs */ for (lmac = 0; lmac < bgx->lmac_count; lmac++) bgx_lmac_disable(bgx, lmac); bgx_vnic[bgx->bgx_id] = NULL; pci_release_regions(pdev); pci_disable_device(pdev); pci_set_drvdata(pdev, NULL); } static struct pci_driver bgx_driver = { .name = DRV_NAME, .id_table = bgx_id_table, .probe = bgx_probe, .remove = bgx_remove, }; static int __init bgx_init_module(void) { pr_info("%s, ver %s\n", DRV_NAME, DRV_VERSION); return pci_register_driver(&bgx_driver); } static void __exit bgx_cleanup_module(void) { pci_unregister_driver(&bgx_driver); } module_init(bgx_init_module); module_exit(bgx_cleanup_module);