/* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. * * Copyright (C) 2009-2013 John Crispin */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ralink_soc_eth.h" #include "esw_rt3052.h" #include "mdio.h" #include "ralink_ethtool.h" #define TX_TIMEOUT (2 * HZ) #define MAX_RX_LENGTH 1536 #define FE_RX_OFFSET (NET_SKB_PAD + NET_IP_ALIGN) #define FE_RX_HLEN (FE_RX_OFFSET + VLAN_ETH_HLEN + VLAN_HLEN + \ ETH_FCS_LEN) #define DMA_DUMMY_DESC 0xffffffff #define FE_DEFAULT_MSG_ENABLE \ (NETIF_MSG_DRV | \ NETIF_MSG_PROBE | \ NETIF_MSG_LINK | \ NETIF_MSG_TIMER | \ NETIF_MSG_IFDOWN | \ NETIF_MSG_IFUP | \ NETIF_MSG_RX_ERR | \ NETIF_MSG_TX_ERR) #define TX_DMA_DESP2_DEF (TX_DMA_LS0 | TX_DMA_DONE) #define TX_DMA_DESP4_DEF (TX_DMA_QN(3) | TX_DMA_PN(1)) #define NEXT_TX_DESP_IDX(X) (((X) + 1) & (NUM_DMA_DESC - 1)) #define NEXT_RX_DESP_IDX(X) (((X) + 1) & (NUM_DMA_DESC - 1)) static int fe_msg_level = -1; module_param_named(msg_level, fe_msg_level, int, 0); MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)"); static const u32 fe_reg_table_default[FE_REG_COUNT] = { [FE_REG_PDMA_GLO_CFG] = FE_PDMA_GLO_CFG, [FE_REG_PDMA_RST_CFG] = FE_PDMA_RST_CFG, [FE_REG_DLY_INT_CFG] = FE_DLY_INT_CFG, [FE_REG_TX_BASE_PTR0] = FE_TX_BASE_PTR0, [FE_REG_TX_MAX_CNT0] = FE_TX_MAX_CNT0, [FE_REG_TX_CTX_IDX0] = FE_TX_CTX_IDX0, [FE_REG_RX_BASE_PTR0] = FE_RX_BASE_PTR0, [FE_REG_RX_MAX_CNT0] = FE_RX_MAX_CNT0, [FE_REG_RX_CALC_IDX0] = FE_RX_CALC_IDX0, [FE_REG_FE_INT_ENABLE] = FE_FE_INT_ENABLE, [FE_REG_FE_INT_STATUS] = FE_FE_INT_STATUS, [FE_REG_FE_DMA_VID_BASE] = FE_DMA_VID0, [FE_REG_FE_COUNTER_BASE] = FE_GDMA1_TX_GBCNT, [FE_REG_FE_RST_GL] = FE_FE_RST_GL, }; static const u32 *fe_reg_table = fe_reg_table_default; static void __iomem *fe_base = 0; void fe_w32(u32 val, unsigned reg) { __raw_writel(val, fe_base + reg); } u32 fe_r32(unsigned reg) { return __raw_readl(fe_base + reg); } void fe_reg_w32(u32 val, enum fe_reg reg) { fe_w32(val, fe_reg_table[reg]); } u32 fe_reg_r32(enum fe_reg reg) { return fe_r32(fe_reg_table[reg]); } static inline void fe_int_disable(u32 mask) { fe_reg_w32(fe_reg_r32(FE_REG_FE_INT_ENABLE) & ~mask, FE_REG_FE_INT_ENABLE); /* flush write */ fe_reg_r32(FE_REG_FE_INT_ENABLE); } static inline void fe_int_enable(u32 mask) { fe_reg_w32(fe_reg_r32(FE_REG_FE_INT_ENABLE) | mask, FE_REG_FE_INT_ENABLE); /* flush write */ fe_reg_r32(FE_REG_FE_INT_ENABLE); } static inline void fe_hw_set_macaddr(struct fe_priv *priv, unsigned char *mac) { unsigned long flags; spin_lock_irqsave(&priv->page_lock, flags); fe_w32((mac[0] << 8) | mac[1], FE_GDMA1_MAC_ADRH); fe_w32((mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5], FE_GDMA1_MAC_ADRL); spin_unlock_irqrestore(&priv->page_lock, flags); } static int fe_set_mac_address(struct net_device *dev, void *p) { int ret = eth_mac_addr(dev, p); if (!ret) { struct fe_priv *priv = netdev_priv(dev); if (priv->soc->set_mac) priv->soc->set_mac(priv, dev->dev_addr); else fe_hw_set_macaddr(priv, p); } return ret; } static inline int fe_max_frag_size(int mtu) { return SKB_DATA_ALIGN(FE_RX_HLEN + mtu) + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); } static inline int fe_max_buf_size(int frag_size) { return frag_size - FE_RX_HLEN - SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); } static void fe_clean_rx(struct fe_priv *priv) { int i; if (priv->rx_data) { for (i = 0; i < NUM_DMA_DESC; i++) if (priv->rx_data[i]) { if (priv->rx_dma && priv->rx_dma[i].rxd1) dma_unmap_single(&priv->netdev->dev, priv->rx_dma[i].rxd1, priv->rx_buf_size, DMA_FROM_DEVICE); put_page(virt_to_head_page(priv->rx_data[i])); } kfree(priv->rx_data); priv->rx_data = NULL; } if (priv->rx_dma) { dma_free_coherent(&priv->netdev->dev, NUM_DMA_DESC * sizeof(*priv->rx_dma), priv->rx_dma, priv->rx_phys); priv->rx_dma = NULL; } } static int fe_alloc_rx(struct fe_priv *priv) { struct net_device *netdev = priv->netdev; int i; priv->rx_data = kcalloc(NUM_DMA_DESC, sizeof(*priv->rx_data), GFP_KERNEL); if (!priv->rx_data) goto no_rx_mem; for (i = 0; i < NUM_DMA_DESC; i++) { priv->rx_data[i] = netdev_alloc_frag(priv->frag_size); if (!priv->rx_data[i]) goto no_rx_mem; } priv->rx_dma = dma_alloc_coherent(&netdev->dev, NUM_DMA_DESC * sizeof(*priv->rx_dma), &priv->rx_phys, GFP_ATOMIC | __GFP_ZERO); if (!priv->rx_dma) goto no_rx_mem; for (i = 0; i < NUM_DMA_DESC; i++) { dma_addr_t dma_addr = dma_map_single(&netdev->dev, priv->rx_data[i] + FE_RX_OFFSET, priv->rx_buf_size, DMA_FROM_DEVICE); if (unlikely(dma_mapping_error(&netdev->dev, dma_addr))) goto no_rx_mem; priv->rx_dma[i].rxd1 = (unsigned int) dma_addr; if (priv->soc->rx_dma) priv->soc->rx_dma(priv, i, priv->rx_buf_size); else priv->rx_dma[i].rxd2 = RX_DMA_LSO; } wmb(); fe_reg_w32(priv->rx_phys, FE_REG_RX_BASE_PTR0); fe_reg_w32(NUM_DMA_DESC, FE_REG_RX_MAX_CNT0); fe_reg_w32((NUM_DMA_DESC - 1), FE_REG_RX_CALC_IDX0); fe_reg_w32(FE_PST_DRX_IDX0, FE_REG_PDMA_RST_CFG); return 0; no_rx_mem: return -ENOMEM; } static void fe_clean_tx(struct fe_priv *priv) { int i; if (priv->tx_skb) { for (i = 0; i < NUM_DMA_DESC; i++) { if (priv->tx_skb[i]) dev_kfree_skb_any(priv->tx_skb[i]); } kfree(priv->tx_skb); priv->tx_skb = NULL; } if (priv->tx_dma) { dma_free_coherent(&priv->netdev->dev, NUM_DMA_DESC * sizeof(*priv->tx_dma), priv->tx_dma, priv->tx_phys); priv->tx_dma = NULL; } } static int fe_alloc_tx(struct fe_priv *priv) { int i; priv->tx_free_idx = 0; priv->tx_skb = kcalloc(NUM_DMA_DESC, sizeof(*priv->tx_skb), GFP_KERNEL); if (!priv->tx_skb) goto no_tx_mem; priv->tx_dma = dma_alloc_coherent(&priv->netdev->dev, NUM_DMA_DESC * sizeof(*priv->tx_dma), &priv->tx_phys, GFP_ATOMIC | __GFP_ZERO); if (!priv->tx_dma) goto no_tx_mem; for (i = 0; i < NUM_DMA_DESC; i++) { if (priv->soc->tx_dma) { priv->soc->tx_dma(priv, i, NULL); continue; } priv->tx_dma[i].txd2 = TX_DMA_DESP2_DEF; } wmb(); fe_reg_w32(priv->tx_phys, FE_REG_TX_BASE_PTR0); fe_reg_w32(NUM_DMA_DESC, FE_REG_TX_MAX_CNT0); fe_reg_w32(0, FE_REG_TX_CTX_IDX0); fe_reg_w32(FE_PST_DTX_IDX0, FE_REG_PDMA_RST_CFG); return 0; no_tx_mem: return -ENOMEM; } static int fe_init_dma(struct fe_priv *priv) { int err; err = fe_alloc_tx(priv); if (err) return err; err = fe_alloc_rx(priv); if (err) return err; return 0; } static void fe_free_dma(struct fe_priv *priv) { fe_clean_tx(priv); fe_clean_rx(priv); netdev_reset_queue(priv->netdev); } static inline void txd_unmap_single(struct device *dev, struct fe_tx_dma *txd) { if (txd->txd1 && TX_DMA_GET_PLEN0(txd->txd2)) dma_unmap_single(dev, txd->txd1, TX_DMA_GET_PLEN0(txd->txd2), DMA_TO_DEVICE); } static inline void txd_unmap_page0(struct device *dev, struct fe_tx_dma *txd) { if (txd->txd1 && TX_DMA_GET_PLEN0(txd->txd2)) dma_unmap_page(dev, txd->txd1, TX_DMA_GET_PLEN0(txd->txd2), DMA_TO_DEVICE); } static inline void txd_unmap_page1(struct device *dev, struct fe_tx_dma *txd) { if (txd->txd3 && TX_DMA_GET_PLEN1(txd->txd2)) dma_unmap_page(dev, txd->txd3, TX_DMA_GET_PLEN1(txd->txd2), DMA_TO_DEVICE); } void fe_stats_update(struct fe_priv *priv) { struct fe_hw_stats *hwstats = priv->hw_stats; unsigned int base = fe_reg_table[FE_REG_FE_COUNTER_BASE]; u64_stats_update_begin(&hwstats->syncp); if (IS_ENABLED(CONFIG_SOC_MT7621)) { hwstats->rx_bytes += fe_r32(base); hwstats->rx_packets += fe_r32(base + 0x08); hwstats->rx_overflow += fe_r32(base + 0x10); hwstats->rx_fcs_errors += fe_r32(base + 0x14); hwstats->rx_short_errors += fe_r32(base + 0x18); hwstats->rx_long_errors += fe_r32(base + 0x1c); hwstats->rx_checksum_errors += fe_r32(base + 0x20); hwstats->rx_flow_control_packets += fe_r32(base + 0x24); hwstats->tx_skip += fe_r32(base + 0x28); hwstats->tx_collisions += fe_r32(base + 0x2c); hwstats->tx_bytes += fe_r32(base + 0x30); hwstats->tx_packets += fe_r32(base + 0x38); } else { hwstats->tx_bytes += fe_r32(base); hwstats->tx_packets += fe_r32(base + 0x04); hwstats->tx_skip += fe_r32(base + 0x08); hwstats->tx_collisions += fe_r32(base + 0x0c); hwstats->rx_bytes += fe_r32(base + 0x20); hwstats->rx_packets += fe_r32(base + 0x24); hwstats->rx_overflow += fe_r32(base + 0x28); hwstats->rx_fcs_errors += fe_r32(base + 0x2c); hwstats->rx_short_errors += fe_r32(base + 0x30); hwstats->rx_long_errors += fe_r32(base + 0x34); hwstats->rx_checksum_errors += fe_r32(base + 0x38); hwstats->rx_flow_control_packets += fe_r32(base + 0x3c); } u64_stats_update_end(&hwstats->syncp); } static struct rtnl_link_stats64 *fe_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *storage) { struct fe_priv *priv = netdev_priv(dev); struct fe_hw_stats *hwstats = priv->hw_stats; unsigned int base = fe_reg_table[FE_REG_FE_COUNTER_BASE]; unsigned int start; if (!base) { netdev_stats_to_stats64(storage, &dev->stats); return storage; } if (netif_running(dev) && netif_device_present(dev)) { if (spin_trylock(&hwstats->stats_lock)) { fe_stats_update(priv); spin_unlock(&hwstats->stats_lock); } } do { start = u64_stats_fetch_begin_bh(&hwstats->syncp); storage->rx_packets = hwstats->rx_packets; storage->tx_packets = hwstats->tx_packets; storage->rx_bytes = hwstats->rx_bytes; storage->tx_bytes = hwstats->tx_bytes; storage->collisions = hwstats->tx_collisions; storage->rx_length_errors = hwstats->rx_short_errors + hwstats->rx_long_errors; storage->rx_over_errors = hwstats->rx_overflow; storage->rx_crc_errors = hwstats->rx_fcs_errors; storage->rx_errors = hwstats->rx_checksum_errors; storage->tx_aborted_errors = hwstats->tx_skip; } while (u64_stats_fetch_retry_bh(&hwstats->syncp, start)); storage->tx_errors = priv->netdev->stats.tx_errors; storage->rx_dropped = priv->netdev->stats.rx_dropped; storage->tx_dropped = priv->netdev->stats.tx_dropped; return storage; } static int fe_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) { struct fe_priv *priv = netdev_priv(dev); u32 idx = (vid & 0xf); u32 vlan_cfg; if (!((fe_reg_table[FE_REG_FE_DMA_VID_BASE]) && (dev->features | NETIF_F_HW_VLAN_CTAG_TX))) return 0; if (test_bit(idx, &priv->vlan_map)) { netdev_warn(dev, "disable tx vlan offload\n"); dev->wanted_features &= ~NETIF_F_HW_VLAN_CTAG_TX; netdev_update_features(dev); } else { vlan_cfg = fe_r32(fe_reg_table[FE_REG_FE_DMA_VID_BASE] + ((idx >> 1) << 2)); if (idx & 0x1) { vlan_cfg &= 0xffff; vlan_cfg |= (vid << 16); } else { vlan_cfg &= 0xffff0000; vlan_cfg |= vid; } fe_w32(vlan_cfg, fe_reg_table[FE_REG_FE_DMA_VID_BASE] + ((idx >> 1) << 2)); set_bit(idx, &priv->vlan_map); } return 0; } static int fe_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) { struct fe_priv *priv = netdev_priv(dev); u32 idx = (vid & 0xf); if (!((fe_reg_table[FE_REG_FE_DMA_VID_BASE]) && (dev->features | NETIF_F_HW_VLAN_CTAG_TX))) return 0; clear_bit(idx, &priv->vlan_map); return 0; } static int fe_tx_map_dma(struct sk_buff *skb, struct net_device *dev, int idx) { struct fe_priv *priv = netdev_priv(dev); struct skb_frag_struct *frag; struct fe_tx_dma *txd; dma_addr_t mapped_addr; unsigned int nr_frags; u32 def_txd4, txd2; int i, j, unmap_idx, tx_num; txd = &priv->tx_dma[idx]; nr_frags = skb_shinfo(skb)->nr_frags; tx_num = 1 + (nr_frags >> 1); /* init tx descriptor */ if (priv->soc->tx_dma) priv->soc->tx_dma(priv, idx, skb); else txd->txd4 = TX_DMA_DESP4_DEF; def_txd4 = txd->txd4; /* use dma_unmap_single to free it */ txd->txd4 |= priv->soc->tx_udf_bit; /* TX Checksum offload */ if (skb->ip_summed == CHECKSUM_PARTIAL) txd->txd4 |= TX_DMA_CHKSUM; /* VLAN header offload */ if (vlan_tx_tag_present(skb)) { if (IS_ENABLED(CONFIG_SOC_MT7621)) txd->txd4 |= TX_DMA_INS_VLAN_MT7621 | vlan_tx_tag_get(skb); else txd->txd4 |= TX_DMA_INS_VLAN | ((vlan_tx_tag_get(skb) >> VLAN_PRIO_SHIFT) << 4) | (vlan_tx_tag_get(skb) & 0xF); } /* TSO: fill MSS info in tcp checksum field */ if (skb_is_gso(skb)) { if (skb_cow_head(skb, 0)) { netif_warn(priv, tx_err, dev, "GSO expand head fail.\n"); goto err_out; } if (skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) { txd->txd4 |= TX_DMA_TSO; tcp_hdr(skb)->check = htons(skb_shinfo(skb)->gso_size); } } mapped_addr = dma_map_single(&dev->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); if (unlikely(dma_mapping_error(&dev->dev, mapped_addr))) goto err_out; txd->txd1 = mapped_addr; txd2 = TX_DMA_PLEN0(skb_headlen(skb)); /* TX SG offload */ j = idx; for (i = 0; i < nr_frags; i++) { frag = &skb_shinfo(skb)->frags[i]; mapped_addr = skb_frag_dma_map(&dev->dev, frag, 0, skb_frag_size(frag), DMA_TO_DEVICE); if (unlikely(dma_mapping_error(&dev->dev, mapped_addr))) goto err_dma; if (i & 0x1) { j = NEXT_TX_DESP_IDX(j); txd = &priv->tx_dma[j]; txd->txd1 = mapped_addr; txd2 = TX_DMA_PLEN0(frag->size); txd->txd4 = def_txd4; } else { txd->txd3 = mapped_addr; txd2 |= TX_DMA_PLEN1(frag->size); if (i != (nr_frags -1)) txd->txd2 = txd2; priv->tx_skb[j] = (struct sk_buff *) DMA_DUMMY_DESC; } } /* set last segment */ if (nr_frags & 0x1) txd->txd2 = (txd2 | TX_DMA_LS1); else txd->txd2 = (txd2 | TX_DMA_LS0); /* store skb to cleanup */ priv->tx_skb[j] = skb; wmb(); j = NEXT_TX_DESP_IDX(j); fe_reg_w32(j, FE_REG_TX_CTX_IDX0); return 0; err_dma: /* unmap dma */ txd = &priv->tx_dma[idx]; txd_unmap_single(&dev->dev, txd); j = idx; unmap_idx = i; for (i = 0; i < unmap_idx; i++) { if (i & 0x1) { j = NEXT_TX_DESP_IDX(j); txd = &priv->tx_dma[j]; txd_unmap_page0(&dev->dev, txd); } else { txd_unmap_page1(&dev->dev, txd); } } err_out: /* reinit descriptors and skb */ j = idx; for (i = 0; i < tx_num; i++) { priv->tx_dma[j].txd2 = TX_DMA_DESP2_DEF; priv->tx_skb[j] = NULL; j = NEXT_TX_DESP_IDX(j); } wmb(); return -1; } static inline int fe_skb_padto(struct sk_buff *skb, struct fe_priv *priv) { unsigned int len; int ret; ret = 0; if (unlikely(skb->len < VLAN_ETH_ZLEN)) { if ((priv->flags & FE_FLAG_PADDING_64B) && !(priv->flags & FE_FLAG_PADDING_BUG)) return ret; if (vlan_tx_tag_present(skb)) len = ETH_ZLEN; else if (skb->protocol == cpu_to_be16(ETH_P_8021Q)) len = VLAN_ETH_ZLEN; else if(!(priv->flags & FE_FLAG_PADDING_64B)) len = ETH_ZLEN; else return ret; if (skb->len < len) { if ((ret = skb_pad(skb, len - skb->len)) < 0) return ret; skb->len = len; skb_set_tail_pointer(skb, len); } } return ret; } static inline u32 fe_empty_txd(struct fe_priv *priv, u32 tx_fill_idx) { return (u32)(NUM_DMA_DESC - ((tx_fill_idx - priv->tx_free_idx) & (NUM_DMA_DESC - 1))); } static int fe_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct fe_priv *priv = netdev_priv(dev); struct net_device_stats *stats = &dev->stats; u32 tx; int tx_num; if (fe_skb_padto(skb, priv)) { netif_warn(priv, tx_err, dev, "tx padding failed!\n"); return NETDEV_TX_OK; } spin_lock(&priv->page_lock); tx_num = 1 + (skb_shinfo(skb)->nr_frags >> 1); tx = fe_reg_r32(FE_REG_TX_CTX_IDX0); if (unlikely(fe_empty_txd(priv, tx) <= tx_num)) { netif_stop_queue(dev); spin_unlock(&priv->page_lock); netif_err(priv, tx_queued,dev, "Tx Ring full when queue awake!\n"); return NETDEV_TX_BUSY; } if (fe_tx_map_dma(skb, dev, tx) < 0) { kfree_skb(skb); stats->tx_dropped++; } else { netdev_sent_queue(dev, skb->len); skb_tx_timestamp(skb); stats->tx_packets++; stats->tx_bytes += skb->len; } spin_unlock(&priv->page_lock); return NETDEV_TX_OK; } static inline void fe_rx_vlan(struct sk_buff *skb) { struct ethhdr *ehdr; u16 vlanid; if (!__vlan_get_tag(skb, &vlanid)) { /* pop the vlan tag */ ehdr = (struct ethhdr *)skb->data; memmove(skb->data + VLAN_HLEN, ehdr, ETH_ALEN * 2); skb_pull(skb, VLAN_HLEN); __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid); } } static int fe_poll_rx(struct napi_struct *napi, int budget, struct fe_priv *priv) { struct net_device *netdev = priv->netdev; struct net_device_stats *stats = &netdev->stats; struct fe_soc_data *soc = priv->soc; u32 checksum_bit; int idx = fe_reg_r32(FE_REG_RX_CALC_IDX0); struct sk_buff *skb; u8 *data, *new_data; struct fe_rx_dma *rxd; int done = 0; bool rx_vlan = netdev->features & NETIF_F_HW_VLAN_CTAG_RX; if (netdev->features & NETIF_F_RXCSUM) checksum_bit = soc->checksum_bit; else checksum_bit = 0; while (done < budget) { unsigned int pktlen; dma_addr_t dma_addr; idx = NEXT_RX_DESP_IDX(idx); rxd = &priv->rx_dma[idx]; data = priv->rx_data[idx]; if (!(rxd->rxd2 & RX_DMA_DONE)) break; /* alloc new buffer */ new_data = netdev_alloc_frag(priv->frag_size); if (unlikely(!new_data)) { stats->rx_dropped++; goto release_desc; } dma_addr = dma_map_single(&netdev->dev, new_data + FE_RX_OFFSET, priv->rx_buf_size, DMA_FROM_DEVICE); if (unlikely(dma_mapping_error(&netdev->dev, dma_addr))) { put_page(virt_to_head_page(new_data)); goto release_desc; } /* receive data */ skb = build_skb(data, priv->frag_size); if (unlikely(!skb)) { put_page(virt_to_head_page(new_data)); goto release_desc; } skb_reserve(skb, FE_RX_OFFSET); dma_unmap_single(&netdev->dev, rxd->rxd1, priv->rx_buf_size, DMA_FROM_DEVICE); pktlen = RX_DMA_PLEN0(rxd->rxd2); skb_put(skb, pktlen); skb->dev = netdev; if (rxd->rxd4 & checksum_bit) { skb->ip_summed = CHECKSUM_UNNECESSARY; } else { skb_checksum_none_assert(skb); } if (rx_vlan) fe_rx_vlan(skb); skb->protocol = eth_type_trans(skb, netdev); stats->rx_packets++; stats->rx_bytes += pktlen; napi_gro_receive(napi, skb); priv->rx_data[idx] = new_data; rxd->rxd1 = (unsigned int) dma_addr; release_desc: if (soc->rx_dma) soc->rx_dma(priv, idx, priv->rx_buf_size); else rxd->rxd2 = RX_DMA_LSO; wmb(); fe_reg_w32(idx, FE_REG_RX_CALC_IDX0); done++; } return done; } static int fe_poll_tx(struct fe_priv *priv, int budget) { struct net_device *netdev = priv->netdev; struct device *dev = &netdev->dev; unsigned int bytes_compl = 0; struct sk_buff *skb; struct fe_tx_dma *txd; int done = 0, idx; u32 udf_bit = priv->soc->tx_udf_bit; idx = priv->tx_free_idx; while (done < budget) { txd = &priv->tx_dma[idx]; skb = priv->tx_skb[idx]; if (!(txd->txd2 & TX_DMA_DONE) || !skb) break; txd_unmap_page1(dev, txd); if (txd->txd4 & udf_bit) txd_unmap_single(dev, txd); else txd_unmap_page0(dev, txd); if (skb != (struct sk_buff *) DMA_DUMMY_DESC) { bytes_compl += skb->len; dev_kfree_skb_any(skb); done++; } priv->tx_skb[idx] = NULL; idx = NEXT_TX_DESP_IDX(idx); } priv->tx_free_idx = idx; if (!done) return 0; netdev_completed_queue(netdev, done, bytes_compl); if (unlikely(netif_queue_stopped(netdev) && netif_carrier_ok(netdev))) { netif_wake_queue(netdev); } return done; } static int fe_poll(struct napi_struct *napi, int budget) { struct fe_priv *priv = container_of(napi, struct fe_priv, rx_napi); struct fe_hw_stats *hwstat = priv->hw_stats; int tx_done, rx_done; u32 status, mask; u32 tx_intr, rx_intr; status = fe_reg_r32(FE_REG_FE_INT_STATUS); tx_intr = priv->soc->tx_dly_int; rx_intr = priv->soc->rx_dly_int; tx_done = rx_done = 0; poll_again: if (status & tx_intr) { tx_done += fe_poll_tx(priv, budget - tx_done); if (tx_done < budget) { fe_reg_w32(tx_intr, FE_REG_FE_INT_STATUS); } status = fe_reg_r32(FE_REG_FE_INT_STATUS); } if (status & rx_intr) { rx_done += fe_poll_rx(napi, budget - rx_done, priv); if (rx_done < budget) { fe_reg_w32(rx_intr, FE_REG_FE_INT_STATUS); } } if (unlikely(hwstat && (status & FE_CNT_GDM_AF))) { if (spin_trylock(&hwstat->stats_lock)) { fe_stats_update(priv); spin_unlock(&hwstat->stats_lock); } fe_reg_w32(FE_CNT_GDM_AF, FE_REG_FE_INT_STATUS); } if (unlikely(netif_msg_intr(priv))) { mask = fe_reg_r32(FE_REG_FE_INT_ENABLE); netdev_info(priv->netdev, "done tx %d, rx %d, intr 0x%x/0x%x\n", tx_done, rx_done, status, mask); } if ((tx_done < budget) && (rx_done < budget)) { status = fe_reg_r32(FE_REG_FE_INT_STATUS); if (status & (tx_intr | rx_intr )) { goto poll_again; } napi_complete(napi); fe_int_enable(tx_intr | rx_intr); } return rx_done; } static void fe_tx_timeout(struct net_device *dev) { struct fe_priv *priv = netdev_priv(dev); priv->netdev->stats.tx_errors++; netif_err(priv, tx_err, dev, "transmit timed out, waking up the queue\n"); netif_info(priv, drv, dev, ": dma_cfg:%08x, free_idx:%d, " \ "dma_ctx_idx=%u, dma_crx_idx=%u\n", fe_reg_r32(FE_REG_PDMA_GLO_CFG), priv->tx_free_idx, fe_reg_r32(FE_REG_TX_CTX_IDX0), fe_reg_r32(FE_REG_RX_CALC_IDX0)); netif_wake_queue(dev); } static irqreturn_t fe_handle_irq(int irq, void *dev) { struct fe_priv *priv = netdev_priv(dev); u32 status, dly_int; status = fe_reg_r32(FE_REG_FE_INT_STATUS); if (unlikely(!status)) return IRQ_NONE; dly_int = (priv->soc->rx_dly_int | priv->soc->tx_dly_int); if (likely(status & dly_int)) { fe_int_disable(dly_int); napi_schedule(&priv->rx_napi); } else { fe_reg_w32(status, FE_REG_FE_INT_STATUS); } return IRQ_HANDLED; } #ifdef CONFIG_NET_POLL_CONTROLLER static void fe_poll_controller(struct net_device *dev) { struct fe_priv *priv = netdev_priv(dev); u32 dly_int = priv->soc->tx_dly_int | priv->soc->rx_dly_int; fe_int_disable(dly_int); fe_handle_irq(dev->irq, dev); fe_int_enable(dly_int); } #endif int fe_set_clock_cycle(struct fe_priv *priv) { unsigned long sysclk = priv->sysclk; if (!sysclk) { return -EINVAL; } sysclk /= FE_US_CYC_CNT_DIVISOR; sysclk <<= FE_US_CYC_CNT_SHIFT; fe_w32((fe_r32(FE_FE_GLO_CFG) & ~(FE_US_CYC_CNT_MASK << FE_US_CYC_CNT_SHIFT)) | sysclk, FE_FE_GLO_CFG); return 0; } void fe_fwd_config(struct fe_priv *priv) { u32 fwd_cfg; fwd_cfg = fe_r32(FE_GDMA1_FWD_CFG); /* disable jumbo frame */ if (priv->flags & FE_FLAG_JUMBO_FRAME) fwd_cfg &= ~FE_GDM1_JMB_EN; /* set unicast/multicast/broadcast frame to cpu */ fwd_cfg &= ~0xffff; fe_w32(fwd_cfg, FE_GDMA1_FWD_CFG); } static void fe_rxcsum_config(bool enable) { if (enable) fe_w32(fe_r32(FE_GDMA1_FWD_CFG) | (FE_GDM1_ICS_EN | FE_GDM1_TCS_EN | FE_GDM1_UCS_EN), FE_GDMA1_FWD_CFG); else fe_w32(fe_r32(FE_GDMA1_FWD_CFG) & ~(FE_GDM1_ICS_EN | FE_GDM1_TCS_EN | FE_GDM1_UCS_EN), FE_GDMA1_FWD_CFG); } static void fe_txcsum_config(bool enable) { if (enable) fe_w32(fe_r32(FE_CDMA_CSG_CFG) | (FE_ICS_GEN_EN | FE_TCS_GEN_EN | FE_UCS_GEN_EN), FE_CDMA_CSG_CFG); else fe_w32(fe_r32(FE_CDMA_CSG_CFG) & ~(FE_ICS_GEN_EN | FE_TCS_GEN_EN | FE_UCS_GEN_EN), FE_CDMA_CSG_CFG); } void fe_csum_config(struct fe_priv *priv) { struct net_device *dev = priv_netdev(priv); fe_txcsum_config((dev->features & NETIF_F_IP_CSUM)); fe_rxcsum_config((dev->features & NETIF_F_RXCSUM)); } static int fe_hw_init(struct net_device *dev) { struct fe_priv *priv = netdev_priv(dev); int i, err; err = devm_request_irq(priv->device, dev->irq, fe_handle_irq, 0, dev_name(priv->device), dev); if (err) return err; if (priv->soc->set_mac) priv->soc->set_mac(priv, dev->dev_addr); else fe_hw_set_macaddr(priv, dev->dev_addr); fe_reg_w32(FE_DELAY_INIT, FE_REG_DLY_INT_CFG); fe_int_disable(priv->soc->tx_dly_int | priv->soc->rx_dly_int); /* frame engine will push VLAN tag regarding to VIDX feild in Tx desc. */ if (fe_reg_table[FE_REG_FE_DMA_VID_BASE]) for (i = 0; i < 16; i += 2) fe_w32(((i + 1) << 16) + i, fe_reg_table[FE_REG_FE_DMA_VID_BASE] + (i * 2)); BUG_ON(!priv->soc->fwd_config); if (priv->soc->fwd_config(priv)) netdev_err(dev, "unable to get clock\n"); if (fe_reg_table[FE_REG_FE_RST_GL]) { fe_reg_w32(1, FE_REG_FE_RST_GL); fe_reg_w32(0, FE_REG_FE_RST_GL); } return 0; } static int fe_open(struct net_device *dev) { struct fe_priv *priv = netdev_priv(dev); unsigned long flags; u32 val; int err; err = fe_init_dma(priv); if (err) goto err_out; spin_lock_irqsave(&priv->page_lock, flags); napi_enable(&priv->rx_napi); val = FE_TX_WB_DDONE | FE_RX_DMA_EN | FE_TX_DMA_EN; val |= priv->soc->pdma_glo_cfg; fe_reg_w32(val, FE_REG_PDMA_GLO_CFG); spin_unlock_irqrestore(&priv->page_lock, flags); if (priv->phy) priv->phy->start(priv); if (priv->soc->has_carrier && priv->soc->has_carrier(priv)) netif_carrier_on(dev); netif_start_queue(dev); fe_int_enable(priv->soc->tx_dly_int | priv->soc->rx_dly_int); return 0; err_out: fe_free_dma(priv); return err; } static int fe_stop(struct net_device *dev) { struct fe_priv *priv = netdev_priv(dev); unsigned long flags; int i; fe_int_disable(priv->soc->tx_dly_int | priv->soc->rx_dly_int); netif_tx_disable(dev); if (priv->phy) priv->phy->stop(priv); spin_lock_irqsave(&priv->page_lock, flags); napi_disable(&priv->rx_napi); fe_reg_w32(fe_reg_r32(FE_REG_PDMA_GLO_CFG) & ~(FE_TX_WB_DDONE | FE_RX_DMA_EN | FE_TX_DMA_EN), FE_REG_PDMA_GLO_CFG); spin_unlock_irqrestore(&priv->page_lock, flags); /* wait dma stop */ for (i = 0; i < 10; i++) { if (fe_reg_r32(FE_REG_PDMA_GLO_CFG) & (FE_TX_DMA_BUSY | FE_RX_DMA_BUSY)) { msleep(10); continue; } break; } fe_free_dma(priv); return 0; } static int __init fe_init(struct net_device *dev) { struct fe_priv *priv = netdev_priv(dev); struct device_node *port; int err; BUG_ON(!priv->soc->reset_fe); priv->soc->reset_fe(); if (priv->soc->switch_init) priv->soc->switch_init(priv); memcpy(dev->dev_addr, priv->soc->mac, ETH_ALEN); of_get_mac_address_mtd(priv->device->of_node, dev->dev_addr); err = fe_mdio_init(priv); if (err) return err; if (priv->soc->port_init) for_each_child_of_node(priv->device->of_node, port) if (of_device_is_compatible(port, "ralink,eth-port") && of_device_is_available(port)) priv->soc->port_init(priv, port); if (priv->phy) { err = priv->phy->connect(priv); if (err) goto err_phy_disconnect; } err = fe_hw_init(dev); if (err) goto err_phy_disconnect; if (priv->soc->switch_config) priv->soc->switch_config(priv); return 0; err_phy_disconnect: if (priv->phy) priv->phy->disconnect(priv); fe_mdio_cleanup(priv); return err; } static void fe_uninit(struct net_device *dev) { struct fe_priv *priv = netdev_priv(dev); if (priv->phy) priv->phy->disconnect(priv); fe_mdio_cleanup(priv); fe_reg_w32(0, FE_REG_FE_INT_ENABLE); free_irq(dev->irq, dev); } static int fe_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) { struct fe_priv *priv = netdev_priv(dev); if (!priv->phy_dev) return -ENODEV; switch (cmd) { case SIOCETHTOOL: return phy_ethtool_ioctl(priv->phy_dev, (void *) ifr->ifr_data); case SIOCGMIIPHY: case SIOCGMIIREG: case SIOCSMIIREG: return phy_mii_ioctl(priv->phy_dev, ifr, cmd); default: break; } return -EOPNOTSUPP; } static int fe_change_mtu(struct net_device *dev, int new_mtu) { struct fe_priv *priv = netdev_priv(dev); int frag_size, old_mtu; u32 fwd_cfg; if (!(priv->flags & FE_FLAG_JUMBO_FRAME)) return eth_change_mtu(dev, new_mtu); frag_size = fe_max_frag_size(new_mtu); if (new_mtu < 68 || frag_size > PAGE_SIZE) return -EINVAL; old_mtu = dev->mtu; dev->mtu = new_mtu; /* return early if the buffer sizes will not change */ if (old_mtu <= ETH_DATA_LEN && new_mtu <= ETH_DATA_LEN) return 0; if (old_mtu > ETH_DATA_LEN && new_mtu > ETH_DATA_LEN) return 0; if (new_mtu <= ETH_DATA_LEN) { priv->frag_size = fe_max_frag_size(ETH_DATA_LEN); priv->rx_buf_size = fe_max_buf_size(ETH_DATA_LEN); } else { priv->frag_size = PAGE_SIZE; priv->rx_buf_size = fe_max_buf_size(PAGE_SIZE); } if (!netif_running(dev)) return 0; fe_stop(dev); fwd_cfg = fe_r32(FE_GDMA1_FWD_CFG); if (new_mtu <= ETH_DATA_LEN) fwd_cfg &= ~FE_GDM1_JMB_EN; else { fwd_cfg &= ~(FE_GDM1_JMB_LEN_MASK << FE_GDM1_JMB_LEN_SHIFT); fwd_cfg |= (DIV_ROUND_UP(frag_size, 1024) << FE_GDM1_JMB_LEN_SHIFT) | FE_GDM1_JMB_EN; } fe_w32(fwd_cfg, FE_GDMA1_FWD_CFG); return fe_open(dev); } static const struct net_device_ops fe_netdev_ops = { .ndo_init = fe_init, .ndo_uninit = fe_uninit, .ndo_open = fe_open, .ndo_stop = fe_stop, .ndo_start_xmit = fe_start_xmit, .ndo_set_mac_address = fe_set_mac_address, .ndo_validate_addr = eth_validate_addr, .ndo_do_ioctl = fe_do_ioctl, .ndo_change_mtu = fe_change_mtu, .ndo_tx_timeout = fe_tx_timeout, .ndo_get_stats64 = fe_get_stats64, .ndo_vlan_rx_add_vid = fe_vlan_rx_add_vid, .ndo_vlan_rx_kill_vid = fe_vlan_rx_kill_vid, #ifdef CONFIG_NET_POLL_CONTROLLER .ndo_poll_controller = fe_poll_controller, #endif }; static int fe_probe(struct platform_device *pdev) { struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); const struct of_device_id *match; struct fe_soc_data *soc; struct net_device *netdev; struct fe_priv *priv; struct clk *sysclk; int err; device_reset(&pdev->dev); match = of_match_device(of_fe_match, &pdev->dev); soc = (struct fe_soc_data *) match->data; if (soc->reg_table) fe_reg_table = soc->reg_table; else soc->reg_table = fe_reg_table; fe_base = devm_request_and_ioremap(&pdev->dev, res); if (!fe_base) { err = -EADDRNOTAVAIL; goto err_out; } netdev = alloc_etherdev(sizeof(*priv)); if (!netdev) { dev_err(&pdev->dev, "alloc_etherdev failed\n"); err = -ENOMEM; goto err_iounmap; } SET_NETDEV_DEV(netdev, &pdev->dev); netdev->netdev_ops = &fe_netdev_ops; netdev->base_addr = (unsigned long) fe_base; netdev->watchdog_timeo = TX_TIMEOUT; netdev->irq = platform_get_irq(pdev, 0); if (netdev->irq < 0) { dev_err(&pdev->dev, "no IRQ resource found\n"); err = -ENXIO; goto err_free_dev; } if (soc->init_data) soc->init_data(soc, netdev); /* fake NETIF_F_HW_VLAN_CTAG_RX for good GRO performance */ netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX; netdev->vlan_features = netdev->hw_features & ~(NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX); netdev->features |= netdev->hw_features; /* fake rx vlan filter func. to support tx vlan offload func */ if (fe_reg_table[FE_REG_FE_DMA_VID_BASE]) netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; priv = netdev_priv(netdev); spin_lock_init(&priv->page_lock); if (fe_reg_table[FE_REG_FE_COUNTER_BASE]) { priv->hw_stats = kzalloc(sizeof(*priv->hw_stats), GFP_KERNEL); if (!priv->hw_stats) { err = -ENOMEM; goto err_free_dev; } spin_lock_init(&priv->hw_stats->stats_lock); } sysclk = devm_clk_get(&pdev->dev, NULL); if (!IS_ERR(sysclk)) priv->sysclk = clk_get_rate(sysclk); priv->netdev = netdev; priv->device = &pdev->dev; priv->soc = soc; priv->msg_enable = netif_msg_init(fe_msg_level, FE_DEFAULT_MSG_ENABLE); priv->frag_size = fe_max_frag_size(ETH_DATA_LEN); priv->rx_buf_size = fe_max_buf_size(ETH_DATA_LEN); if (priv->frag_size > PAGE_SIZE) { dev_err(&pdev->dev, "error frag size.\n"); err = -EINVAL; goto err_free_dev; } netif_napi_add(netdev, &priv->rx_napi, fe_poll, 32); fe_set_ethtool_ops(netdev); err = register_netdev(netdev); if (err) { dev_err(&pdev->dev, "error bringing up device\n"); goto err_free_dev; } platform_set_drvdata(pdev, netdev); netif_info(priv, probe, netdev, "ralink at 0x%08lx, irq %d\n", netdev->base_addr, netdev->irq); return 0; err_free_dev: free_netdev(netdev); err_iounmap: devm_iounmap(&pdev->dev, fe_base); err_out: return err; } static int fe_remove(struct platform_device *pdev) { struct net_device *dev = platform_get_drvdata(pdev); struct fe_priv *priv = netdev_priv(dev); netif_napi_del(&priv->rx_napi); if (priv->hw_stats) kfree(priv->hw_stats); unregister_netdev(dev); free_netdev(dev); platform_set_drvdata(pdev, NULL); return 0; } static struct platform_driver fe_driver = { .probe = fe_probe, .remove = fe_remove, .driver = { .name = "ralink_soc_eth", .owner = THIS_MODULE, .of_match_table = of_fe_match, }, }; static int __init init_rtfe(void) { int ret; ret = rtesw_init(); if (ret) return ret; ret = platform_driver_register(&fe_driver); if (ret) rtesw_exit(); return ret; } static void __exit exit_rtfe(void) { platform_driver_unregister(&fe_driver); rtesw_exit(); } module_init(init_rtfe); module_exit(exit_rtfe); MODULE_LICENSE("GPL"); MODULE_AUTHOR("John Crispin "); MODULE_DESCRIPTION("Ethernet driver for Ralink SoC"); MODULE_VERSION(FE_DRV_VERSION);