diff options
Diffstat (limited to 'target/linux/ramips/files-4.9/drivers/net/ethernet/mtk/mtk_eth_soc.c')
| -rw-r--r-- | target/linux/ramips/files-4.9/drivers/net/ethernet/mtk/mtk_eth_soc.c | 1601 |
1 files changed, 0 insertions, 1601 deletions
diff --git a/target/linux/ramips/files-4.9/drivers/net/ethernet/mtk/mtk_eth_soc.c b/target/linux/ramips/files-4.9/drivers/net/ethernet/mtk/mtk_eth_soc.c deleted file mode 100644 index d53f6c024e..0000000000 --- a/target/linux/ramips/files-4.9/drivers/net/ethernet/mtk/mtk_eth_soc.c +++ /dev/null @@ -1,1601 +0,0 @@ -/* 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. - * - * Copyright (C) 2009-2015 John Crispin <blogic@openwrt.org> - * Copyright (C) 2009-2015 Felix Fietkau <nbd@nbd.name> - * Copyright (C) 2013-2015 Michael Lee <igvtee@gmail.com> - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/dma-mapping.h> -#include <linux/init.h> -#include <linux/skbuff.h> -#include <linux/etherdevice.h> -#include <linux/ethtool.h> -#include <linux/platform_device.h> -#include <linux/of_device.h> -#include <linux/clk.h> -#include <linux/of_net.h> -#include <linux/of_mdio.h> -#include <linux/if_vlan.h> -#include <linux/reset.h> -#include <linux/tcp.h> -#include <linux/io.h> -#include <linux/bug.h> - -#include <asm/mach-ralink/ralink_regs.h> - -#include "mtk_eth_soc.h" -#include "mdio.h" -#include "ethtool.h" - -#define MAX_RX_LENGTH 1536 -#define FE_RX_ETH_HLEN (VLAN_ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN) -#define FE_RX_HLEN (NET_SKB_PAD + FE_RX_ETH_HLEN + NET_IP_ALIGN) -#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) & (ring->tx_ring_size - 1)) -#define NEXT_RX_DESP_IDX(X) (((X) + 1) & (ring->rx_ring_size - 1)) - -#define SYSC_REG_RSTCTRL 0x34 - -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 u16 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_TX_DTX_IDX0] = FE_TX_DTX_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_RX_DRX_IDX0] = FE_RX_DRX_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 u16 *fe_reg_table = fe_reg_table_default; - -struct fe_work_t { - int bitnr; - void (*action)(struct fe_priv *); -}; - -static void __iomem *fe_base; - -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]); -} - -void fe_reset(u32 reset_bits) -{ - u32 t; - - t = rt_sysc_r32(SYSC_REG_RSTCTRL); - t |= reset_bits; - rt_sysc_w32(t, SYSC_REG_RSTCTRL); - usleep_range(10, 20); - - t &= ~reset_bits; - rt_sysc_w32(t, SYSC_REG_RSTCTRL); - usleep_range(10, 20); -} - -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) -{ - /* make sure buf_size will be at least MAX_RX_LENGTH */ - if (mtu + FE_RX_ETH_HLEN < MAX_RX_LENGTH) - mtu = MAX_RX_LENGTH - FE_RX_ETH_HLEN; - - 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) -{ - int buf_size = frag_size - NET_SKB_PAD - NET_IP_ALIGN - - SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); - - BUG_ON(buf_size < MAX_RX_LENGTH); - return buf_size; -} - -static inline void fe_get_rxd(struct fe_rx_dma *rxd, struct fe_rx_dma *dma_rxd) -{ - rxd->rxd1 = dma_rxd->rxd1; - rxd->rxd2 = dma_rxd->rxd2; - rxd->rxd3 = dma_rxd->rxd3; - rxd->rxd4 = dma_rxd->rxd4; -} - -static inline void fe_set_txd(struct fe_tx_dma *txd, struct fe_tx_dma *dma_txd) -{ - dma_txd->txd1 = txd->txd1; - dma_txd->txd3 = txd->txd3; - dma_txd->txd4 = txd->txd4; - /* clean dma done flag last */ - dma_txd->txd2 = txd->txd2; -} - -static void fe_clean_rx(struct fe_priv *priv) -{ - int i; - struct fe_rx_ring *ring = &priv->rx_ring; - - if (ring->rx_data) { - for (i = 0; i < ring->rx_ring_size; i++) - if (ring->rx_data[i]) { - if (ring->rx_dma && ring->rx_dma[i].rxd1) - dma_unmap_single(&priv->netdev->dev, - ring->rx_dma[i].rxd1, - ring->rx_buf_size, - DMA_FROM_DEVICE); - skb_free_frag(ring->rx_data[i]); - } - - kfree(ring->rx_data); - ring->rx_data = NULL; - } - - if (ring->rx_dma) { - dma_free_coherent(&priv->netdev->dev, - ring->rx_ring_size * sizeof(*ring->rx_dma), - ring->rx_dma, - ring->rx_phys); - ring->rx_dma = NULL; - } -} - -static int fe_alloc_rx(struct fe_priv *priv) -{ - struct net_device *netdev = priv->netdev; - struct fe_rx_ring *ring = &priv->rx_ring; - int i, pad; - - ring->rx_data = kcalloc(ring->rx_ring_size, sizeof(*ring->rx_data), - GFP_KERNEL); - if (!ring->rx_data) - goto no_rx_mem; - - for (i = 0; i < ring->rx_ring_size; i++) { - ring->rx_data[i] = netdev_alloc_frag(ring->frag_size); - if (!ring->rx_data[i]) - goto no_rx_mem; - } - - ring->rx_dma = dma_alloc_coherent(&netdev->dev, - ring->rx_ring_size * sizeof(*ring->rx_dma), - &ring->rx_phys, - GFP_ATOMIC | __GFP_ZERO); - if (!ring->rx_dma) - goto no_rx_mem; - - if (priv->flags & FE_FLAG_RX_2B_OFFSET) - pad = 0; - else - pad = NET_IP_ALIGN; - for (i = 0; i < ring->rx_ring_size; i++) { - dma_addr_t dma_addr = dma_map_single(&netdev->dev, - ring->rx_data[i] + NET_SKB_PAD + pad, - ring->rx_buf_size, - DMA_FROM_DEVICE); - if (unlikely(dma_mapping_error(&netdev->dev, dma_addr))) - goto no_rx_mem; - ring->rx_dma[i].rxd1 = (unsigned int)dma_addr; - - if (priv->flags & FE_FLAG_RX_SG_DMA) - ring->rx_dma[i].rxd2 = RX_DMA_PLEN0(ring->rx_buf_size); - else - ring->rx_dma[i].rxd2 = RX_DMA_LSO; - } - ring->rx_calc_idx = ring->rx_ring_size - 1; - /* make sure that all changes to the dma ring are flushed before we - * continue - */ - wmb(); - - fe_reg_w32(ring->rx_phys, FE_REG_RX_BASE_PTR0); - fe_reg_w32(ring->rx_ring_size, FE_REG_RX_MAX_CNT0); - fe_reg_w32(ring->rx_calc_idx, 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_txd_unmap(struct device *dev, struct fe_tx_buf *tx_buf) -{ - if (tx_buf->flags & FE_TX_FLAGS_SINGLE0) { - dma_unmap_single(dev, - dma_unmap_addr(tx_buf, dma_addr0), - dma_unmap_len(tx_buf, dma_len0), - DMA_TO_DEVICE); - } else if (tx_buf->flags & FE_TX_FLAGS_PAGE0) { - dma_unmap_page(dev, - dma_unmap_addr(tx_buf, dma_addr0), - dma_unmap_len(tx_buf, dma_len0), - DMA_TO_DEVICE); - } - if (tx_buf->flags & FE_TX_FLAGS_PAGE1) - dma_unmap_page(dev, - dma_unmap_addr(tx_buf, dma_addr1), - dma_unmap_len(tx_buf, dma_len1), - DMA_TO_DEVICE); - - tx_buf->flags = 0; - if (tx_buf->skb && (tx_buf->skb != (struct sk_buff *)DMA_DUMMY_DESC)) - dev_kfree_skb_any(tx_buf->skb); - tx_buf->skb = NULL; -} - -static void fe_clean_tx(struct fe_priv *priv) -{ - int i; - struct device *dev = &priv->netdev->dev; - struct fe_tx_ring *ring = &priv->tx_ring; - - if (ring->tx_buf) { - for (i = 0; i < ring->tx_ring_size; i++) - fe_txd_unmap(dev, &ring->tx_buf[i]); - kfree(ring->tx_buf); - ring->tx_buf = NULL; - } - - if (ring->tx_dma) { - dma_free_coherent(dev, - ring->tx_ring_size * sizeof(*ring->tx_dma), - ring->tx_dma, - ring->tx_phys); - ring->tx_dma = NULL; - } - - netdev_reset_queue(priv->netdev); -} - -static int fe_alloc_tx(struct fe_priv *priv) -{ - int i; - struct fe_tx_ring *ring = &priv->tx_ring; - - ring->tx_free_idx = 0; - ring->tx_next_idx = 0; - ring->tx_thresh = max((unsigned long)ring->tx_ring_size >> 2, - MAX_SKB_FRAGS); - - ring->tx_buf = kcalloc(ring->tx_ring_size, sizeof(*ring->tx_buf), - GFP_KERNEL); - if (!ring->tx_buf) - goto no_tx_mem; - - ring->tx_dma = dma_alloc_coherent(&priv->netdev->dev, - ring->tx_ring_size * sizeof(*ring->tx_dma), - &ring->tx_phys, - GFP_ATOMIC | __GFP_ZERO); - if (!ring->tx_dma) - goto no_tx_mem; - - for (i = 0; i < ring->tx_ring_size; i++) { - if (priv->soc->tx_dma) - priv->soc->tx_dma(&ring->tx_dma[i]); - ring->tx_dma[i].txd2 = TX_DMA_DESP2_DEF; - } - /* make sure that all changes to the dma ring are flushed before we - * continue - */ - wmb(); - - fe_reg_w32(ring->tx_phys, FE_REG_TX_BASE_PTR0); - fe_reg_w32(ring->tx_ring_size, 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); -} - -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; - - u64_stats_update_begin(&hwstats->syncp); - - if (IS_ENABLED(CONFIG_SOC_MT7621)) { - hwstats->rx_bytes += fe_r32(base); - stats = fe_r32(base + 0x04); - if (stats) - hwstats->rx_bytes += (stats << 32); - 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); - stats = fe_r32(base + 0x34); - if (stats) - hwstats->tx_bytes += (stats << 32); - 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_irq(&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_irq(&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 inline u32 fe_empty_txd(struct fe_tx_ring *ring) -{ - barrier(); - return (u32)(ring->tx_ring_size - - ((ring->tx_next_idx - ring->tx_free_idx) & - (ring->tx_ring_size - 1))); -} - -static int fe_tx_map_dma(struct sk_buff *skb, struct net_device *dev, - int tx_num, struct fe_tx_ring *ring) -{ - struct fe_priv *priv = netdev_priv(dev); - struct skb_frag_struct *frag; - struct fe_tx_dma txd, *ptxd; - struct fe_tx_buf *tx_buf; - dma_addr_t mapped_addr; - unsigned int nr_frags; - u32 def_txd4; - int i, j, k, frag_size, frag_map_size, offset; - - tx_buf = &ring->tx_buf[ring->tx_next_idx]; - memset(tx_buf, 0, sizeof(*tx_buf)); - memset(&txd, 0, sizeof(txd)); - nr_frags = skb_shinfo(skb)->nr_frags; - - /* init tx descriptor */ - if (priv->soc->tx_dma) - priv->soc->tx_dma(&txd); - else - txd.txd4 = TX_DMA_DESP4_DEF; - def_txd4 = txd.txd4; - - /* TX Checksum offload */ - if (skb->ip_summed == CHECKSUM_PARTIAL) - txd.txd4 |= TX_DMA_CHKSUM; - - /* VLAN header offload */ - if (skb_vlan_tag_present(skb)) { - u16 tag = skb_vlan_tag_get(skb); - - if (IS_ENABLED(CONFIG_SOC_MT7621)) - txd.txd4 |= TX_DMA_INS_VLAN_MT7621 | tag; - else - txd.txd4 |= TX_DMA_INS_VLAN | - ((tag >> VLAN_PRIO_SHIFT) << 4) | - (tag & 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; - txd.txd2 = TX_DMA_PLEN0(skb_headlen(skb)); - - tx_buf->flags |= FE_TX_FLAGS_SINGLE0; - dma_unmap_addr_set(tx_buf, dma_addr0, mapped_addr); - dma_unmap_len_set(tx_buf, dma_len0, skb_headlen(skb)); - - /* TX SG offload */ - j = ring->tx_next_idx; - k = 0; - for (i = 0; i < nr_frags; i++) { - offset = 0; - frag = &skb_shinfo(skb)->frags[i]; - frag_size = skb_frag_size(frag); - - while (frag_size > 0) { - frag_map_size = min(frag_size, TX_DMA_BUF_LEN); - mapped_addr = skb_frag_dma_map(&dev->dev, frag, offset, - frag_map_size, - DMA_TO_DEVICE); - if (unlikely(dma_mapping_error(&dev->dev, mapped_addr))) - goto err_dma; - - if (k & 0x1) { - j = NEXT_TX_DESP_IDX(j); - txd.txd1 = mapped_addr; - txd.txd2 = TX_DMA_PLEN0(frag_map_size); - txd.txd4 = def_txd4; - - tx_buf = &ring->tx_buf[j]; - memset(tx_buf, 0, sizeof(*tx_buf)); - - tx_buf->flags |= FE_TX_FLAGS_PAGE0; - dma_unmap_addr_set(tx_buf, dma_addr0, - mapped_addr); - dma_unmap_len_set(tx_buf, dma_len0, - frag_map_size); - } else { - txd.txd3 = mapped_addr; - txd.txd2 |= TX_DMA_PLEN1(frag_map_size); - - tx_buf->skb = (struct sk_buff *)DMA_DUMMY_DESC; - tx_buf->flags |= FE_TX_FLAGS_PAGE1; - dma_unmap_addr_set(tx_buf, dma_addr1, - mapped_addr); - dma_unmap_len_set(tx_buf, dma_len1, - frag_map_size); - - if (!((i == (nr_frags - 1)) && - (frag_map_size == frag_size))) { - fe_set_txd(&txd, &ring->tx_dma[j]); - memset(&txd, 0, sizeof(txd)); - } - } - frag_size -= frag_map_size; - offset += frag_map_size; - k++; - } - } - - /* set last segment */ - if (k & 0x1) - txd.txd2 |= TX_DMA_LS1; - else - txd.txd2 |= TX_DMA_LS0; - fe_set_txd(&txd, &ring->tx_dma[j]); - - /* store skb to cleanup */ - tx_buf->skb = skb; - - netdev_sent_queue(dev, skb->len); - skb_tx_timestamp(skb); - - ring->tx_next_idx = NEXT_TX_DESP_IDX(j); - /* make sure that all changes to the dma ring are flushed before we - * continue - */ - wmb(); - if (unlikely(fe_empty_txd(ring) <= ring->tx_thresh)) { - netif_stop_queue(dev); - smp_mb(); - if (unlikely(fe_empty_txd(ring) > ring->tx_thresh)) - netif_wake_queue(dev); - } - - if (netif_xmit_stopped(netdev_get_tx_queue(dev, 0)) || !skb->xmit_more) - fe_reg_w32(ring->tx_next_idx, FE_REG_TX_CTX_IDX0); - - return 0; - -err_dma: - j = ring->tx_next_idx; - for (i = 0; i < tx_num; i++) { - ptxd = &ring->tx_dma[j]; - tx_buf = &ring->tx_buf[j]; - - /* unmap dma */ - fe_txd_unmap(&dev->dev, tx_buf); - - ptxd->txd2 = TX_DMA_DESP2_DEF; - j = NEXT_TX_DESP_IDX(j); - } - /* make sure that all changes to the dma ring are flushed before we - * continue - */ - wmb(); - -err_out: - 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 (skb_vlan_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) { - ret = skb_pad(skb, len - skb->len); - if (ret < 0) - return ret; - skb->len = len; - skb_set_tail_pointer(skb, len); - } - } - - return ret; -} - -static inline int fe_cal_txd_req(struct sk_buff *skb) -{ - int i, nfrags; - struct skb_frag_struct *frag; - - nfrags = 1; - if (skb_is_gso(skb)) { - for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { - frag = &skb_shinfo(skb)->frags[i]; - nfrags += DIV_ROUND_UP(frag->size, TX_DMA_BUF_LEN); - } - } else { - nfrags += skb_shinfo(skb)->nr_frags; - } - - return DIV_ROUND_UP(nfrags, 2); -} - -static int fe_start_xmit(struct sk_buff *skb, struct net_device *dev) -{ - struct fe_priv *priv = netdev_priv(dev); - struct fe_tx_ring *ring = &priv->tx_ring; - struct net_device_stats *stats = &dev->stats; - int tx_num; - int len = skb->len; - - if (fe_skb_padto(skb, priv)) { - netif_warn(priv, tx_err, dev, "tx padding failed!\n"); - return NETDEV_TX_OK; - } - - tx_num = fe_cal_txd_req(skb); - if (unlikely(fe_empty_txd(ring) <= tx_num)) { - netif_stop_queue(dev); - 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_num, ring) < 0) { - stats->tx_dropped++; - } else { - stats->tx_packets++; - stats->tx_bytes += len; - } - - return NETDEV_TX_OK; -} - -static int fe_poll_rx(struct napi_struct *napi, int budget, - struct fe_priv *priv, u32 rx_intr) -{ - struct net_device *netdev = priv->netdev; - struct net_device_stats *stats = &netdev->stats; - struct fe_soc_data *soc = priv->soc; - struct fe_rx_ring *ring = &priv->rx_ring; - int idx = ring->rx_calc_idx; - u32 checksum_bit; - struct sk_buff *skb; - u8 *data, *new_data; - struct fe_rx_dma *rxd, trxd; - int done = 0, pad; - - if (netdev->features & NETIF_F_RXCSUM) - checksum_bit = soc->checksum_bit; - else - checksum_bit = 0; - - if (priv->flags & FE_FLAG_RX_2B_OFFSET) - pad = 0; - else - pad = NET_IP_ALIGN; - - while (done < budget) { - unsigned int pktlen; - dma_addr_t dma_addr; - - idx = NEXT_RX_DESP_IDX(idx); - rxd = &ring->rx_dma[idx]; - data = ring->rx_data[idx]; - - fe_get_rxd(&trxd, rxd); - if (!(trxd.rxd2 & RX_DMA_DONE)) - break; - - /* alloc new buffer */ - new_data = napi_alloc_frag(ring->frag_size); - if (unlikely(!new_data)) { - stats->rx_dropped++; - goto release_desc; - } - dma_addr = dma_map_single(&netdev->dev, - new_data + NET_SKB_PAD + pad, - ring->rx_buf_size, - DMA_FROM_DEVICE); - if (unlikely(dma_mapping_error(&netdev->dev, dma_addr))) { - skb_free_frag(new_data); - goto release_desc; - } - - /* receive data */ - skb = build_skb(data, ring->frag_size); - if (unlikely(!skb)) { - skb_free_frag(new_data); - goto release_desc; - } - skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN); - - dma_unmap_single(&netdev->dev, trxd.rxd1, - ring->rx_buf_size, DMA_FROM_DEVICE); - pktlen = RX_DMA_GET_PLEN0(trxd.rxd2); - skb->dev = netdev; - skb_put(skb, pktlen); - if (trxd.rxd4 & checksum_bit) - skb->ip_summed = CHECKSUM_UNNECESSARY; - else - skb_checksum_none_assert(skb); - skb->protocol = eth_type_trans(skb, netdev); - - stats->rx_packets++; - stats->rx_bytes += pktlen; - - napi_gro_receive(napi, skb); - - ring->rx_data[idx] = new_data; - rxd->rxd1 = (unsigned int)dma_addr; - -release_desc: - if (priv->flags & FE_FLAG_RX_SG_DMA) - rxd->rxd2 = RX_DMA_PLEN0(ring->rx_buf_size); - else - rxd->rxd2 = RX_DMA_LSO; - - ring->rx_calc_idx = idx; - /* make sure that all changes to the dma ring are flushed before - * we continue - */ - wmb(); - fe_reg_w32(ring->rx_calc_idx, FE_REG_RX_CALC_IDX0); - done++; - } - - if (done < budget) - fe_reg_w32(rx_intr, FE_REG_FE_INT_STATUS); - - return done; -} - -static int fe_poll_tx(struct fe_priv *priv, int budget, u32 tx_intr, - int *tx_again) -{ - struct net_device *netdev = priv->netdev; - struct device *dev = &netdev->dev; - unsigned int bytes_compl = 0; - struct sk_buff *skb; - struct fe_tx_buf *tx_buf; - int done = 0; - u32 idx, hwidx; - struct fe_tx_ring *ring = &priv->tx_ring; - - idx = ring->tx_free_idx; - hwidx = fe_reg_r32(FE_REG_TX_DTX_IDX0); - - while ((idx != hwidx) && budget) { - tx_buf = &ring->tx_buf[idx]; - skb = tx_buf->skb; - - if (!skb) - break; - - if (skb != (struct sk_buff *)DMA_DUMMY_DESC) { - bytes_compl += skb->len; - done++; - budget--; - } - fe_txd_unmap(dev, tx_buf); - idx = NEXT_TX_DESP_IDX(idx); - } - ring->tx_free_idx = idx; - - if (idx == hwidx) { - /* read hw index again make sure no new tx packet */ - hwidx = fe_reg_r32(FE_REG_TX_DTX_IDX0); - if (idx == hwidx) - fe_reg_w32(tx_intr, FE_REG_FE_INT_STATUS); - else - *tx_again = 1; - } else { - *tx_again = 1; - } - - if (done) { - netdev_completed_queue(netdev, done, bytes_compl); - smp_mb(); - if (unlikely(netif_queue_stopped(netdev) && - (fe_empty_txd(ring) > ring->tx_thresh))) - 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, tx_again; - u32 status, fe_status, status_reg, mask; - u32 tx_intr, rx_intr, status_intr; - - status = fe_reg_r32(FE_REG_FE_INT_STATUS); - fe_status = status; - tx_intr = priv->soc->tx_int; - rx_intr = priv->soc->rx_int; - status_intr = priv->soc->status_int; - tx_done = 0; - rx_done = 0; - tx_again = 0; - - if (fe_reg_table[FE_REG_FE_INT_STATUS2]) { - fe_status = fe_reg_r32(FE_REG_FE_INT_STATUS2); - status_reg = FE_REG_FE_INT_STATUS2; - } else { - status_reg = FE_REG_FE_INT_STATUS; - } - - if (status & tx_intr) - tx_done = fe_poll_tx(priv, budget, tx_intr, &tx_again); - - if (status & rx_intr) - rx_done = fe_poll_rx(napi, budget, priv, rx_intr); - - if (unlikely(fe_status & status_intr)) { - if (hwstat && spin_trylock(&hwstat->stats_lock)) { - fe_stats_update(priv); - spin_unlock(&hwstat->stats_lock); - } - fe_reg_w32(status_intr, status_reg); - } - - 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%08x/0x%x\n", - tx_done, rx_done, status, mask); - } - - if (!tx_again && (rx_done < budget)) { - status = fe_reg_r32(FE_REG_FE_INT_STATUS); - if (status & (tx_intr | rx_intr)) { - /* let napi poll again */ - rx_done = budget; - goto poll_again; - } - - napi_complete_done(napi, rx_done); - fe_int_enable(tx_intr | rx_intr); - } else { - rx_done = budget; - } - -poll_again: - return rx_done; -} - -static void fe_tx_timeout(struct net_device *dev) -{ - struct fe_priv *priv = netdev_priv(dev); - struct fe_tx_ring *ring = &priv->tx_ring; - - priv->netdev->stats.tx_errors++; - netif_err(priv, tx_err, dev, - "transmit timed out\n"); - netif_info(priv, drv, dev, "dma_cfg:%08x\n", - fe_reg_r32(FE_REG_PDMA_GLO_CFG)); - netif_info(priv, drv, dev, "tx_ring=%d, " - "base=%08x, max=%u, ctx=%u, dtx=%u, fdx=%hu, next=%hu\n", - 0, fe_reg_r32(FE_REG_TX_BASE_PTR0), - fe_reg_r32(FE_REG_TX_MAX_CNT0), - fe_reg_r32(FE_REG_TX_CTX_IDX0), - fe_reg_r32(FE_REG_TX_DTX_IDX0), - ring->tx_free_idx, - ring->tx_next_idx); - netif_info(priv, drv, dev, - "rx_ring=%d, base=%08x, max=%u, calc=%u, drx=%u\n", - 0, fe_reg_r32(FE_REG_RX_BASE_PTR0), - fe_reg_r32(FE_REG_RX_MAX_CNT0), - fe_reg_r32(FE_REG_RX_CALC_IDX0), - fe_reg_r32(FE_REG_RX_DRX_IDX0)); - - if (!test_and_set_bit(FE_FLAG_RESET_PENDING, priv->pending_flags)) - schedule_work(&priv->pending_work); -} - -static irqreturn_t fe_handle_irq(int irq, void *dev) -{ - struct fe_priv *priv = netdev_priv(dev); - u32 status, int_mask; - - status = fe_reg_r32(FE_REG_FE_INT_STATUS); - - if (unlikely(!status)) - return IRQ_NONE; - - int_mask = (priv->soc->rx_int | priv->soc->tx_int); - if (likely(status & int_mask)) { - if (likely(napi_schedule_prep(&priv->rx_napi))) { - fe_int_disable(int_mask); - __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 int_mask = priv->soc->tx_int | priv->soc->rx_int; - - fe_int_disable(int_mask); - fe_handle_irq(dev->irq, dev); - fe_int_enable(int_mask); -} -#endif - -int fe_set_clock_cycle(struct fe_priv *priv) -{ - unsigned long sysclk = priv->sysclk; - - 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); - - /* disable delay interrupt */ - fe_reg_w32(0, FE_REG_DLY_INT_CFG); - - fe_int_disable(priv->soc->tx_int | priv->soc->rx_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)); - - 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) { - fe_free_dma(priv); - return err; - } - - spin_lock_irqsave(&priv->page_lock, flags); - - val = FE_TX_WB_DDONE | FE_RX_DMA_EN | FE_TX_DMA_EN; - if (priv->flags & FE_FLAG_RX_2B_OFFSET) - val |= FE_RX_2B_OFFSET; - 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); - - napi_enable(&priv->rx_napi); - fe_int_enable(priv->soc->tx_int | priv->soc->rx_int); - netif_start_queue(dev); - - return 0; -} - -static int fe_stop(struct net_device *dev) -{ - struct fe_priv *priv = netdev_priv(dev); - unsigned long flags; - int i; - - netif_tx_disable(dev); - fe_int_disable(priv->soc->tx_int | priv->soc->rx_int); - napi_disable(&priv->rx_napi); - - if (priv->phy) - priv->phy->stop(priv); - - spin_lock_irqsave(&priv->page_lock, flags); - - 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(20); - 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; - const char *mac_addr; - int err; - - priv->soc->reset_fe(); - - if (priv->soc->switch_init) - if (priv->soc->switch_init(priv)) { - netdev_err(dev, "failed to initialize switch core\n"); - return -ENODEV; - } - - mac_addr = of_get_mac_address(priv->device->of_node); - if (mac_addr) - ether_addr_copy(dev->dev_addr, mac_addr); - - /* If the mac address is invalid, use random mac address */ - if (!is_valid_ether_addr(dev->dev_addr)) { - random_ether_addr(dev->dev_addr); - dev_err(priv->device, "generated random MAC address %pM\n", - 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, "mediatek,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->flags & FE_FLAG_HAS_SWITCH) && 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); - - if (IS_ENABLED(CONFIG_SOC_MT7621)) - if (new_mtu > 2048) - return -EINVAL; - - 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->rx_ring.frag_size = fe_max_frag_size(ETH_DATA_LEN); - else - priv->rx_ring.frag_size = PAGE_SIZE; - priv->rx_ring.rx_buf_size = fe_max_buf_size(priv->rx_ring.frag_size); - - if (!netif_running(dev)) - return 0; - - fe_stop(dev); - if (!IS_ENABLED(CONFIG_SOC_MT7621)) { - 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 void fe_reset_pending(struct fe_priv *priv) -{ - struct net_device *dev = priv->netdev; - int err; - - rtnl_lock(); - fe_stop(dev); - - err = fe_open(dev); - if (err) { - netif_alert(priv, ifup, dev, - "Driver up/down cycle failed, closing device.\n"); - dev_close(dev); - } - rtnl_unlock(); -} - -static const struct fe_work_t fe_work[] = { - {FE_FLAG_RESET_PENDING, fe_reset_pending}, -}; - -static void fe_pending_work(struct work_struct *work) -{ - struct fe_priv *priv = container_of(work, struct fe_priv, pending_work); - int i; - bool pending; - - for (i = 0; i < ARRAY_SIZE(fe_work); i++) { - pending = test_and_clear_bit(fe_work[i].bitnr, - priv->pending_flags); - if (pending) - fe_work[i].action(priv); - } -} - -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, napi_weight; - - 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_ioremap_resource(&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->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); - netdev->vlan_features = netdev->hw_features & ~NETIF_F_HW_VLAN_CTAG_TX; - 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); - } else if ((priv->flags & FE_FLAG_CALIBRATE_CLK)) { - dev_err(&pdev->dev, "this soc needs a clk for calibration\n"); - err = -ENXIO; - goto err_free_dev; - } - - priv->switch_np = of_parse_phandle(pdev->dev.of_node, "mediatek,switch", 0); - if ((priv->flags & FE_FLAG_HAS_SWITCH) && !priv->switch_np) { - dev_err(&pdev->dev, "failed to read switch phandle\n"); - err = -ENODEV; - goto err_free_dev; - } - - priv->netdev = netdev; - priv->device = &pdev->dev; - priv->soc = soc; - priv->msg_enable = netif_msg_init(fe_msg_level, FE_DEFAULT_MSG_ENABLE); - priv->rx_ring.frag_size = fe_max_frag_size(ETH_DATA_LEN); - priv->rx_ring.rx_buf_size = fe_max_buf_size(priv->rx_ring.frag_size); - priv->tx_ring.tx_ring_size = NUM_DMA_DESC; - priv->rx_ring.rx_ring_size = NUM_DMA_DESC; - INIT_WORK(&priv->pending_work, fe_pending_work); - - napi_weight = 16; - if (priv->flags & FE_FLAG_NAPI_WEIGHT) { - napi_weight *= 4; - priv->tx_ring.tx_ring_size *= 4; - priv->rx_ring.rx_ring_size *= 4; - } - netif_napi_add(netdev, &priv->rx_napi, fe_poll, napi_weight); - 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, "mediatek frame engine 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); - kfree(priv->hw_stats); - - cancel_work_sync(&priv->pending_work); - - 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 = "mtk_soc_eth", - .owner = THIS_MODULE, - .of_match_table = of_fe_match, - }, -}; - -module_platform_driver(fe_driver); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("John Crispin <blogic@openwrt.org>"); -MODULE_DESCRIPTION("Ethernet driver for Ralink SoC"); -MODULE_VERSION(MTK_FE_DRV_VERSION); |