0a83299935
The strlcpy should not be used because it doesn't limit the source length. As linus says, it's a completely useless function if you can't implicitly trust the source string - but that is almost always why people think they should use it! All in all the BSD function will lead some potential bugs. But the strscpy doesn't require reading memory from the src string beyond the specified "count" bytes, and since the return value is easier to error-check than strlcpy()'s. In addition, the implementation is robust to the string changing out from underneath it, unlike the current strlcpy() implementation. Thus, We prefer using strscpy instead of strlcpy. Signed-off-by: Jason Wang <wangborong@cdjrlc.com> Signed-off-by: David S. Miller <davem@davemloft.net>
283 lines
6.2 KiB
C
283 lines
6.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright (c) 2016, The Linux Foundation. All rights reserved.
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*/
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#include <linux/ethtool.h>
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#include <linux/phy.h>
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#include "emac.h"
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static const char * const emac_ethtool_stat_strings[] = {
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"rx_ok",
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"rx_bcast",
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"rx_mcast",
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"rx_pause",
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"rx_ctrl",
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"rx_fcs_err",
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"rx_len_err",
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"rx_byte_cnt",
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"rx_runt",
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"rx_frag",
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"rx_sz_64",
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"rx_sz_65_127",
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"rx_sz_128_255",
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"rx_sz_256_511",
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"rx_sz_512_1023",
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"rx_sz_1024_1518",
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"rx_sz_1519_max",
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"rx_sz_ov",
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"rx_rxf_ov",
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"rx_align_err",
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"rx_bcast_byte_cnt",
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"rx_mcast_byte_cnt",
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"rx_err_addr",
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"rx_crc_align",
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"rx_jabbers",
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"tx_ok",
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"tx_bcast",
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"tx_mcast",
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"tx_pause",
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"tx_exc_defer",
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"tx_ctrl",
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"tx_defer",
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"tx_byte_cnt",
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"tx_sz_64",
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"tx_sz_65_127",
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"tx_sz_128_255",
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"tx_sz_256_511",
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"tx_sz_512_1023",
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"tx_sz_1024_1518",
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"tx_sz_1519_max",
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"tx_1_col",
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"tx_2_col",
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"tx_late_col",
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"tx_abort_col",
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"tx_underrun",
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"tx_rd_eop",
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"tx_len_err",
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"tx_trunc",
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"tx_bcast_byte",
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"tx_mcast_byte",
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"tx_col",
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};
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#define EMAC_STATS_LEN ARRAY_SIZE(emac_ethtool_stat_strings)
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static u32 emac_get_msglevel(struct net_device *netdev)
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{
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struct emac_adapter *adpt = netdev_priv(netdev);
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return adpt->msg_enable;
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}
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static void emac_set_msglevel(struct net_device *netdev, u32 data)
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{
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struct emac_adapter *adpt = netdev_priv(netdev);
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adpt->msg_enable = data;
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}
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static int emac_get_sset_count(struct net_device *netdev, int sset)
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{
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switch (sset) {
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case ETH_SS_PRIV_FLAGS:
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return 1;
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case ETH_SS_STATS:
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return EMAC_STATS_LEN;
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default:
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return -EOPNOTSUPP;
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}
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}
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static void emac_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
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{
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unsigned int i;
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switch (stringset) {
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case ETH_SS_PRIV_FLAGS:
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strcpy(data, "single-pause-mode");
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break;
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case ETH_SS_STATS:
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for (i = 0; i < EMAC_STATS_LEN; i++) {
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strscpy(data, emac_ethtool_stat_strings[i],
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ETH_GSTRING_LEN);
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data += ETH_GSTRING_LEN;
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}
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break;
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}
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}
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static void emac_get_ethtool_stats(struct net_device *netdev,
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struct ethtool_stats *stats,
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u64 *data)
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{
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struct emac_adapter *adpt = netdev_priv(netdev);
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spin_lock(&adpt->stats.lock);
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emac_update_hw_stats(adpt);
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memcpy(data, &adpt->stats, EMAC_STATS_LEN * sizeof(u64));
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spin_unlock(&adpt->stats.lock);
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}
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static int emac_nway_reset(struct net_device *netdev)
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{
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struct phy_device *phydev = netdev->phydev;
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if (!phydev)
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return -ENODEV;
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return genphy_restart_aneg(phydev);
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}
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static void emac_get_ringparam(struct net_device *netdev,
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struct ethtool_ringparam *ring)
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{
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struct emac_adapter *adpt = netdev_priv(netdev);
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ring->rx_max_pending = EMAC_MAX_RX_DESCS;
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ring->tx_max_pending = EMAC_MAX_TX_DESCS;
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ring->rx_pending = adpt->rx_desc_cnt;
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ring->tx_pending = adpt->tx_desc_cnt;
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}
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static int emac_set_ringparam(struct net_device *netdev,
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struct ethtool_ringparam *ring)
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{
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struct emac_adapter *adpt = netdev_priv(netdev);
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/* We don't have separate queues/rings for small/large frames, so
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* reject any attempt to specify those values separately.
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*/
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if (ring->rx_mini_pending || ring->rx_jumbo_pending)
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return -EINVAL;
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adpt->tx_desc_cnt =
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clamp_val(ring->tx_pending, EMAC_MIN_TX_DESCS, EMAC_MAX_TX_DESCS);
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adpt->rx_desc_cnt =
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clamp_val(ring->rx_pending, EMAC_MIN_RX_DESCS, EMAC_MAX_RX_DESCS);
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if (netif_running(netdev))
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return emac_reinit_locked(adpt);
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return 0;
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}
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static void emac_get_pauseparam(struct net_device *netdev,
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struct ethtool_pauseparam *pause)
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{
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struct emac_adapter *adpt = netdev_priv(netdev);
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pause->autoneg = adpt->automatic ? AUTONEG_ENABLE : AUTONEG_DISABLE;
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pause->rx_pause = adpt->rx_flow_control ? 1 : 0;
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pause->tx_pause = adpt->tx_flow_control ? 1 : 0;
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}
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static int emac_set_pauseparam(struct net_device *netdev,
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struct ethtool_pauseparam *pause)
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{
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struct emac_adapter *adpt = netdev_priv(netdev);
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adpt->automatic = pause->autoneg == AUTONEG_ENABLE;
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adpt->rx_flow_control = pause->rx_pause != 0;
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adpt->tx_flow_control = pause->tx_pause != 0;
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if (netif_running(netdev))
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return emac_reinit_locked(adpt);
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return 0;
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}
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/* Selected registers that might want to track during runtime. */
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static const u16 emac_regs[] = {
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EMAC_DMA_MAS_CTRL,
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EMAC_MAC_CTRL,
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EMAC_TXQ_CTRL_0,
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EMAC_RXQ_CTRL_0,
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EMAC_DMA_CTRL,
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EMAC_INT_MASK,
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EMAC_AXI_MAST_CTRL,
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EMAC_CORE_HW_VERSION,
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EMAC_MISC_CTRL,
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};
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/* Every time emac_regs[] above is changed, increase this version number. */
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#define EMAC_REGS_VERSION 0
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#define EMAC_MAX_REG_SIZE ARRAY_SIZE(emac_regs)
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static void emac_get_regs(struct net_device *netdev,
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struct ethtool_regs *regs, void *buff)
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{
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struct emac_adapter *adpt = netdev_priv(netdev);
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u32 *val = buff;
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unsigned int i;
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regs->version = EMAC_REGS_VERSION;
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regs->len = EMAC_MAX_REG_SIZE * sizeof(u32);
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for (i = 0; i < EMAC_MAX_REG_SIZE; i++)
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val[i] = readl(adpt->base + emac_regs[i]);
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}
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static int emac_get_regs_len(struct net_device *netdev)
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{
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return EMAC_MAX_REG_SIZE * sizeof(u32);
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}
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#define EMAC_PRIV_ENABLE_SINGLE_PAUSE BIT(0)
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static int emac_set_priv_flags(struct net_device *netdev, u32 flags)
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{
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struct emac_adapter *adpt = netdev_priv(netdev);
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adpt->single_pause_mode = !!(flags & EMAC_PRIV_ENABLE_SINGLE_PAUSE);
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if (netif_running(netdev))
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return emac_reinit_locked(adpt);
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return 0;
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}
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static u32 emac_get_priv_flags(struct net_device *netdev)
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{
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struct emac_adapter *adpt = netdev_priv(netdev);
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return adpt->single_pause_mode ? EMAC_PRIV_ENABLE_SINGLE_PAUSE : 0;
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}
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static const struct ethtool_ops emac_ethtool_ops = {
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.get_link_ksettings = phy_ethtool_get_link_ksettings,
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.set_link_ksettings = phy_ethtool_set_link_ksettings,
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.get_msglevel = emac_get_msglevel,
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.set_msglevel = emac_set_msglevel,
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.get_sset_count = emac_get_sset_count,
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.get_strings = emac_get_strings,
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.get_ethtool_stats = emac_get_ethtool_stats,
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.get_ringparam = emac_get_ringparam,
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.set_ringparam = emac_set_ringparam,
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.get_pauseparam = emac_get_pauseparam,
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.set_pauseparam = emac_set_pauseparam,
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.nway_reset = emac_nway_reset,
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.get_link = ethtool_op_get_link,
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.get_regs_len = emac_get_regs_len,
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.get_regs = emac_get_regs,
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.set_priv_flags = emac_set_priv_flags,
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.get_priv_flags = emac_get_priv_flags,
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};
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void emac_set_ethtool_ops(struct net_device *netdev)
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{
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netdev->ethtool_ops = &emac_ethtool_ops;
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}
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