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| /**
* netcard_ethtool_ops - ethtool操作函数集
*
* 提供用户空间ethtool工具访问设备信息和配置的接口
*/
static const struct ethtool_ops netcard_ethtool_ops = {
.get_settings = netcard_get_settings,
.set_settings = netcard_set_settings,
.get_drvinfo = netcard_get_drvinfo,
.get_regs_len = netcard_get_regs_len,
.get_regs = netcard_get_regs,
.get_wol = netcard_get_wol,
.set_wol = netcard_set_wol,
.nway_reset = netcard_nway_reset,
.get_link = ethtool_op_get_link,
.get_eeprom_len = netcard_get_eeprom_len,
.get_eeprom = netcard_get_eeprom,
.set_eeprom = netcard_set_eeprom,
.get_ringparam = netcard_get_ringparam,
.set_ringparam = netcard_set_ringparam,
.get_pauseparam = netcard_get_pauseparam,
.set_pauseparam = netcard_set_pauseparam,
.self_test = netcard_diag_test,
.get_strings = netcard_get_strings,
.get_sset_count = netcard_get_sset_count,
.get_ethtool_stats = netcard_get_ethtool_stats,
.get_coalesce = netcard_get_coalesce,
.set_coalesce = netcard_set_coalesce,
};
/**
* netcard_get_drvinfo - 获取驱动信息
* @netdev: 网络设备
* @drvinfo: 驱动信息结构
*/
static void netcard_get_drvinfo(struct net_device *netdev,
struct ethtool_drvinfo *drvinfo)
{
struct netcard_adapter *adapter = netdev_priv(netdev);
strlcpy(drvinfo->driver, "netcard", sizeof(drvinfo->driver));
strlcpy(drvinfo->version, NETCARD_DRIVER_VERSION,
sizeof(drvinfo->version));
strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
strlcpy(drvinfo->bus_info, pci_name(adapter->pdev),
sizeof(drvinfo->bus_info));
drvinfo->regdump_len = netcard_get_regs_len(netdev);
drvinfo->eedump_len = netcard_get_eeprom_len(netdev);
}
/**
* netcard_get_ringparam - 获取环形缓冲区参数
* @netdev: 网络设备
* @ring: 环形参数结构
*/
static void netcard_get_ringparam(struct net_device *netdev,
struct ethtool_ringparam *ring)
{
struct netcard_adapter *adapter = netdev_priv(netdev);
ring->rx_max_pending = NETCARD_MAX_RXD;
ring->tx_max_pending = NETCARD_MAX_TXD;
ring->rx_pending = adapter->rx_ring_count;
ring->tx_pending = adapter->tx_ring_count;
}
/**
* netcard_set_ringparam - 设置环形缓冲区参数
* @netdev: 网络设备
* @ring: 新的环形参数
*
* 返回值：成功返回0，失败返回负错误码
*/
static int netcard_set_ringparam(struct net_device *netdev,
struct ethtool_ringparam *ring)
{
struct netcard_adapter *adapter = netdev_priv(netdev);
struct netcard_adapter temp_adapter;
int err = 0;
if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
return -EINVAL;
if (ring->tx_pending > NETCARD_MAX_TXD ||
ring->tx_pending < NETCARD_MIN_TXD ||
ring->rx_pending > NETCARD_MAX_RXD ||
ring->rx_pending < NETCARD_MIN_RXD) {
return -EINVAL;
}
if (ring->tx_pending == adapter->tx_ring_count &&
ring->rx_pending == adapter->rx_ring_count) {
/* 没有变化 */
return 0;
}
while (test_and_set_bit(__NETCARD_RESETTING, &adapter->state))
usleep_range(1000, 2000);
if (!netif_running(adapter->netdev)) {
/* 接口未运行，直接更改参数 */
adapter->tx_ring_count = ring->tx_pending;
adapter->rx_ring_count = ring->rx_pending;
goto clear_reset;
}
/* 保存旧的适配器配置 */
memcpy(&temp_adapter, adapter, sizeof(struct netcard_adapter));
/* 设置新的环大小 */
adapter->tx_ring_count = ring->tx_pending;
adapter->rx_ring_count = ring->rx_pending;
/* 重新分配环形缓冲区 */
err = netcard_setup_all_rings(adapter);
if (err) {
/* 恢复旧的配置 */
memcpy(adapter, &temp_adapter, sizeof(struct netcard_adapter));
netcard_setup_all_rings(adapter);
}
clear_reset:
clear_bit(__NETCARD_RESETTING, &adapter->state);
return err;
}
/**
* netcard_get_ethtool_stats - 获取ethtool统计信息
* @netdev: 网络设备
* @stats: 统计信息结构
* @data: 数据数组
*/
static void netcard_get_ethtool_stats(struct net_device *netdev,
struct ethtool_stats *stats, u64 *data)
{
struct netcard_adapter *adapter = netdev_priv(netdev);
u64 *queue_stat;
int i;
char *p;
netcard_update_stats(adapter);
for (i = 0; i < NETCARD_GLOBAL_STATS_LEN; i++) {
p = (char *)adapter + netcard_gstrings_stats[i].stat_offset;
data[i] = (netcard_gstrings_stats[i].sizeof_stat ==
sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
}
}
|