[PATCH net-next v23 08/13] rtase: Implement net_device_ops

Justin Lai
2024-07-10T03:37:49Z

1. Implement .ndo_set_rx_mode so that the device can change address
list filtering.
2. Implement .ndo_set_mac_address so that mac address can be changed.
3. Implement .ndo_change_mtu so that mtu can be changed.
4. Implement .ndo_tx_timeout to perform related processing when the
transmitter does not make any progress.
5. Implement .ndo_get_stats64 to provide statistics that are called
when the user wants to get network device usage.
6. Implement .ndo_vlan_rx_add_vid to register VLAN ID when the device
supports VLAN filtering.
7. Implement .ndo_vlan_rx_kill_vid to unregister VLAN ID when the device
supports VLAN filtering.
8. Implement the .ndo_setup_tc to enable setting any "tc" scheduler,
classifier or action on dev.
9. Implement .ndo_fix_features enables adjusting requested feature flags
based on device-specific constraints.
10. Implement .ndo_set_features enables updating device configuration to
new features.

Signed-off-by: Justin Lai <justinlai0215@realtek.com>
---
.../net/ethernet/realtek/rtase/rtase_main.c | 235 ++++++++++++++++++
1 file changed, 235 insertions(+)

diff --git a/drivers/net/ethernet/realtek/rtase/rtase_main.c b/drivers/net/ethernet/realtek/rtase/rtase_main.c
index 7fe0e95acf70..4ea9c4d0c242 100644
--- a/drivers/net/ethernet/realtek/rtase/rtase_main.c
+++ b/drivers/net/ethernet/realtek/rtase/rtase_main.c
@@ -1433,6 +1433,11 @@ static netdev_tx_t rtase_start_xmit(struct sk_buff *skb,
return NETDEV_TX_BUSY;
}

+static void rtase_set_rx_mode(struct net_device *dev)
+{
+ rtase_hw_set_rx_packet_filter(dev);
+}
+
static void rtase_enable_eem_write(const struct rtase_private *tp)
{
u8 val;
@@ -1465,6 +1470,203 @@ static void rtase_rar_set(const struct rtase_private *tp, const u8 *addr)
rtase_w16(tp, RTASE_LBK_CTRL, RTASE_LBK_ATLD | RTASE_LBK_CLR);
}

+static int rtase_set_mac_address(struct net_device *dev, void *p)
+{
+ struct rtase_private *tp = netdev_priv(dev);
+ int ret;
+
+ ret = eth_mac_addr(dev, p);
+ if (ret)
+ return ret;
+
+ rtase_rar_set(tp, dev->dev_addr);
+
+ return 0;
+}
+
+static int rtase_change_mtu(struct net_device *dev, int new_mtu)
+{
+ dev->mtu = new_mtu;
+
+ netdev_update_features(dev);
+
+ return 0;
+}
+
+static void rtase_wait_for_quiescence(const struct net_device *dev)
+{
+ struct rtase_private *tp = netdev_priv(dev);
+ struct rtase_int_vector *ivec;
+ u32 i;
+
+ for (i = 0; i < tp->int_nums; i++) {
+ ivec = &tp->int_vector[i];
+ synchronize_irq(ivec->irq);
+ /* wait for any pending NAPI task to complete */
+ napi_disable(&ivec->napi);
+ }
+
+ rtase_irq_dis_and_clear(tp);
+
+ for (i = 0; i < tp->int_nums; i++) {
+ ivec = &tp->int_vector[i];
+ napi_enable(&ivec->napi);
+ }
+}
+
+static void rtase_sw_reset(struct net_device *dev)
+{
+ struct rtase_private *tp = netdev_priv(dev);
+ int ret;
+
+ netif_stop_queue(dev);
+ netif_carrier_off(dev);
+ rtase_hw_reset(dev);
+
+ /* let's wait a bit while any (async) irq lands on */
+ rtase_wait_for_quiescence(dev);
+ rtase_tx_clear(tp);
+ rtase_rx_clear(tp);
+
+ ret = rtase_init_ring(dev);
+ if (ret) {
+ netdev_err(dev, "unable to init ring\n");
+ rtase_free_desc(tp);
+ return;
+ }
+
+ rtase_hw_config(dev);
+ /* always link, so start to transmit & receive */
+ rtase_hw_start(dev);
+
+ netif_carrier_on(dev);
+ netif_wake_queue(dev);
+}
+
+static void rtase_dump_tally_counter(const struct rtase_private *tp)
+{
+ dma_addr_t paddr = tp->tally_paddr;
+ u32 cmd = lower_32_bits(paddr);
+ u32 val;
+ int err;
+
+ rtase_w32(tp, RTASE_DTCCR4, upper_32_bits(paddr));
+ rtase_w32(tp, RTASE_DTCCR0, cmd);
+ rtase_w32(tp, RTASE_DTCCR0, cmd | RTASE_COUNTER_DUMP);
+
+ err = read_poll_timeout(rtase_r32, val, !(val & RTASE_COUNTER_DUMP),
+ 10, 250, false, tp, RTASE_DTCCR0);
+
+ if (err == -ETIMEDOUT)
+ netdev_err(tp->dev, "error occurred in dump tally counter\n");
+}
+
+static void rtase_dump_state(const struct net_device *dev)
+{
+ const struct rtase_private *tp = netdev_priv(dev);
+ int max_reg_size = RTASE_PCI_REGS_SIZE;
+ const struct rtase_counters *counters;
+ const struct rtase_ring *ring;
+ u32 dword_rd;
+ int n = 0;
+
+ ring = &tp->tx_ring[0];
+ netdev_err(dev, "Tx descriptor info:\n");
+ netdev_err(dev, "Tx curIdx = 0x%x\n", ring->cur_idx);
+ netdev_err(dev, "Tx dirtyIdx = 0x%x\n", ring->dirty_idx);
+ netdev_err(dev, "Tx phyAddr = %pad\n", &ring->phy_addr);
+
+ ring = &tp->rx_ring[0];
+ netdev_err(dev, "Rx descriptor info:\n");
+ netdev_err(dev, "Rx curIdx = 0x%x\n", ring->cur_idx);
+ netdev_err(dev, "Rx dirtyIdx = 0x%x\n", ring->dirty_idx);
+ netdev_err(dev, "Rx phyAddr = %pad\n", &ring->phy_addr);
+
+ netdev_err(dev, "Device Registers:\n");
+ netdev_err(dev, "Chip Command = 0x%02x\n",
+ rtase_r8(tp, RTASE_CHIP_CMD));
+ netdev_err(dev, "IMR = %08x\n", rtase_r32(tp, RTASE_IMR0));
+ netdev_err(dev, "ISR = %08x\n", rtase_r32(tp, RTASE_ISR0));
+ netdev_err(dev, "Boot Ctrl Reg(0xE004) = %04x\n",
+ rtase_r16(tp, RTASE_BOOT_CTL));
+ netdev_err(dev, "EPHY ISR(0xE014) = %04x\n",
+ rtase_r16(tp, RTASE_EPHY_ISR));
+ netdev_err(dev, "EPHY IMR(0xE016) = %04x\n",
+ rtase_r16(tp, RTASE_EPHY_IMR));
+ netdev_err(dev, "CLKSW SET REG(0xE018) = %04x\n",
+ rtase_r16(tp, RTASE_CLKSW_SET));
+
+ netdev_err(dev, "Dump PCI Registers:\n");
+
+ while (n < max_reg_size) {
+ if ((n % RTASE_DWORD_MOD) == 0)
+ netdev_err(tp->dev, "0x%03x:\n", n);
+
+ pci_read_config_dword(tp->pdev, n, &dword_rd);
+ netdev_err(tp->dev, "%08x\n", dword_rd);
+ n += 4;
+ }
+
+ netdev_err(dev, "Dump tally counter:\n");
+ counters = tp->tally_vaddr;
+ rtase_dump_tally_counter(tp);
+
+ netdev_err(dev, "tx_packets %lld\n",
+ le64_to_cpu(counters->tx_packets));
+ netdev_err(dev, "rx_packets %lld\n",
+ le64_to_cpu(counters->rx_packets));
+ netdev_err(dev, "tx_errors %lld\n",
+ le64_to_cpu(counters->tx_errors));
+ netdev_err(dev, "rx_errors %d\n",
+ le32_to_cpu(counters->rx_errors));
+ netdev_err(dev, "rx_missed %d\n",
+ le16_to_cpu(counters->rx_missed));
+ netdev_err(dev, "align_errors %d\n",
+ le16_to_cpu(counters->align_errors));
+ netdev_err(dev, "tx_one_collision %d\n",
+ le32_to_cpu(counters->tx_one_collision));
+ netdev_err(dev, "tx_multi_collision %d\n",
+ le32_to_cpu(counters->tx_multi_collision));
+ netdev_err(dev, "rx_unicast %lld\n",
+ le64_to_cpu(counters->rx_unicast));
+ netdev_err(dev, "rx_broadcast %lld\n",
+ le64_to_cpu(counters->rx_broadcast));
+ netdev_err(dev, "rx_multicast %d\n",
+ le32_to_cpu(counters->rx_multicast));
+ netdev_err(dev, "tx_aborted %d\n",
+ le16_to_cpu(counters->tx_aborted));
+ netdev_err(dev, "tx_underun %d\n",
+ le16_to_cpu(counters->tx_underun));
+}
+
+static void rtase_tx_timeout(struct net_device *dev, unsigned int txqueue)
+{
+ rtase_dump_state(dev);
+ rtase_sw_reset(dev);
+}
+
+static void rtase_get_stats64(struct net_device *dev,
+ struct rtnl_link_stats64 *stats)
+{
+ const struct rtase_private *tp = netdev_priv(dev);
+ const struct rtase_counters *counters;
+
+ counters = tp->tally_vaddr;
+
+ dev_fetch_sw_netstats(stats, dev->tstats);
+
+ /* fetch additional counter values missing in stats collected by driver
+ * from tally counter
+ */
+ rtase_dump_tally_counter(tp);
+ stats->rx_errors = tp->stats.rx_errors;
+ stats->tx_errors = le64_to_cpu(counters->tx_errors);
+ stats->rx_dropped = tp->stats.rx_dropped;
+ stats->tx_dropped = tp->stats.tx_dropped;
+ stats->multicast = tp->stats.multicast;
+ stats->rx_length_errors = tp->stats.rx_length_errors;
+}
+
#ifdef CONFIG_NET_POLL_CONTROLLER
/* Polling 'interrupt' - used by things like netconsole to send skbs
* without having to re-enable interrupts. It's not called while
@@ -1481,13 +1683,46 @@ static void rtase_netpoll(struct net_device *dev)
}
#endif

+static netdev_features_t rtase_fix_features(struct net_device *dev,
+ netdev_features_t features)
+{
+ netdev_features_t features_fix = features;
+
+ /* not support TSO for jumbo frames */
+ if (dev->mtu > ETH_DATA_LEN)
+ features_fix &= ~NETIF_F_ALL_TSO;
+
+ return features_fix;
+}
+
+static int rtase_set_features(struct net_device *dev,
+ netdev_features_t features)
+{
+ netdev_features_t features_set = features;
+
+ features_set &= NETIF_F_RXALL | NETIF_F_RXCSUM |
+ NETIF_F_HW_VLAN_CTAG_RX;
+
+ if (features_set ^ dev->features)
+ rtase_hw_set_features(dev, features_set);
+
+ return 0;
+}
+
static const struct net_device_ops rtase_netdev_ops = {
.ndo_open = rtase_open,
.ndo_stop = rtase_close,
.ndo_start_xmit = rtase_start_xmit,
+ .ndo_set_rx_mode = rtase_set_rx_mode,
+ .ndo_set_mac_address = rtase_set_mac_address,
+ .ndo_change_mtu = rtase_change_mtu,
+ .ndo_tx_timeout = rtase_tx_timeout,
+ .ndo_get_stats64 = rtase_get_stats64,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = rtase_netpoll,
#endif
+ .ndo_fix_features = rtase_fix_features,
+ .ndo_set_features = rtase_set_features,
};

static void rtase_get_mac_address(struct net_device *dev)
--
2.34.1