+++ /dev/null
-/*
- * 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 <blogic@openwrt.org>
- */
-
-#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 "ralink_soc_eth.h"
-#include "esw_rt3052.h"
-#include "mdio.h"
-#include "ralink_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 = 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]);
-}
-
-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);
- udelay(10);
-
- t &= ~reset_bits;
- rt_sysc_w32(t, SYSC_REG_RSTCTRL);
- udelay(10);
-}
-
-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);
- put_page(virt_to_head_page(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;
- 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;
- }
- 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);
- 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);
- }
- 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) {
- if ((ret = skb_pad(skb, len - skb->len)) < 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 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, 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;
- 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;
-
- 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 = netdev_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))) {
- put_page(virt_to_head_page(new_data));
- goto release_desc;
- }
-
- /* receive data */
- skb = build_skb(data, ring->frag_size);
- if (unlikely(!skb)) {
- put_page(virt_to_head_page(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);
- }
- 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);
-
- 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;
- 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;
-
- fe_status = status = fe_reg_r32(FE_REG_FE_INT_STATUS);
- tx_intr = priv->soc->tx_int;
- rx_intr = priv->soc->rx_int;
- status_intr = priv->soc->status_int;
- tx_done = rx_done = 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(napi);
- 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;
-
- 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);
-
- /* 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));
-
- 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);
-
- 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;
-
-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;
-
- 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(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);
-
- of_get_mac_address_mtd(priv->device->of_node, dev->dev_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, "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->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);
- 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)
- goto error;
- rtnl_unlock();
-
- return;
-error:
- 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);
- /* 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->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 = priv->rx_ring.rx_ring_size = NUM_DMA_DESC;
- INIT_WORK(&priv->pending_work, fe_pending_work);
-
- napi_weight = 32;
- 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, "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);
-
- 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 = "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 <blogic@openwrt.org>");
-MODULE_DESCRIPTION("Ethernet driver for Ralink SoC");
-MODULE_VERSION(FE_DRV_VERSION);
projects / openwrt / svn-archive / archive.git / blobdiff