igc: Add watchdog
Code completion, remove obsolete code Add watchdog methods Signed-off-by: Sasha Neftin <sasha.neftin@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Sasha Neftin
Jeff Kirsher
Родитель
4eb8080143
Коммит
208983f099
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@ -33,6 +33,8 @@ extern char igc_driver_version[];
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#define IGC_FLAG_HAS_MSI BIT(0)
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#define IGC_FLAG_QUEUE_PAIRS BIT(4)
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#define IGC_FLAG_NEED_LINK_UPDATE BIT(9)
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#define IGC_FLAG_MEDIA_RESET BIT(10)
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#define IGC_FLAG_MAS_ENABLE BIT(12)
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#define IGC_FLAG_HAS_MSIX BIT(13)
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#define IGC_FLAG_VLAN_PROMISC BIT(15)
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@ -290,6 +292,7 @@ struct igc_adapter {
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/* TX */
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u16 tx_work_limit;
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u32 tx_timeout_count;
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int num_tx_queues;
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struct igc_ring *tx_ring[IGC_MAX_TX_QUEUES];
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@ -348,6 +351,7 @@ struct igc_adapter {
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struct igc_mac_addr *mac_table;
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unsigned long link_check_timeout;
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struct igc_info ei;
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};
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@ -417,6 +421,14 @@ static inline unsigned int igc_rx_pg_order(struct igc_ring *ring)
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return 0;
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}
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static inline s32 igc_read_phy_reg(struct igc_hw *hw, u32 offset, u16 *data)
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{
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if (hw->phy.ops.read_reg)
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return hw->phy.ops.read_reg(hw, offset, data);
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return 0;
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}
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#define igc_rx_pg_size(_ring) (PAGE_SIZE << igc_rx_pg_order(_ring))
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#define IGC_TXD_DCMD (IGC_ADVTXD_DCMD_EOP | IGC_ADVTXD_DCMD_RS)
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@ -66,6 +66,8 @@
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#define IGC_CTRL_RFCE 0x08000000 /* Receive Flow Control enable */
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#define IGC_CTRL_TFCE 0x10000000 /* Transmit flow control enable */
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#define IGC_CONNSW_AUTOSENSE_EN 0x1
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/* PBA constants */
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#define IGC_PBA_34K 0x0022
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@ -94,6 +96,10 @@
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#define CR_1000T_HD_CAPS 0x0100 /* Advertise 1000T HD capability */
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#define CR_1000T_FD_CAPS 0x0200 /* Advertise 1000T FD capability */
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/* 1000BASE-T Status Register */
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#define SR_1000T_REMOTE_RX_STATUS 0x1000 /* Remote receiver OK */
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#define SR_1000T_LOCAL_RX_STATUS 0x2000 /* Local receiver OK */
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/* PHY GPY 211 registers */
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#define STANDARD_AN_REG_MASK 0x0007 /* MMD */
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#define ANEG_MULTIGBT_AN_CTRL 0x0020 /* MULTI GBT AN Control Register */
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@ -210,6 +216,11 @@
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#define IGC_QVECTOR_MASK 0x7FFC /* Q-vector mask */
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#define IGC_ITR_VAL_MASK 0x04 /* ITR value mask */
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/* Interrupt Cause Set */
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#define IGC_ICS_LSC IGC_ICR_LSC /* Link Status Change */
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#define IGC_ICS_RXDMT0 IGC_ICR_RXDMT0 /* rx desc min. threshold */
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#define IGC_ICS_DRSTA IGC_ICR_DRSTA /* Device Reset Aserted */
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#define IGC_ICR_DOUTSYNC 0x10000000 /* NIC DMA out of sync */
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#define IGC_EITR_CNT_IGNR 0x80000000 /* Don't reset counters on write */
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#define IGC_IVAR_VALID 0x80
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@ -197,6 +197,7 @@ struct igc_dev_spec_base {
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bool clear_semaphore_once;
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bool module_plugged;
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u8 media_port;
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bool mas_capable;
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};
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struct igc_hw {
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@ -1743,6 +1743,7 @@ static void igc_up(struct igc_adapter *adapter)
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/* start the watchdog. */
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hw->mac.get_link_status = 1;
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schedule_work(&adapter->watchdog_task);
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}
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/**
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@ -2297,6 +2298,55 @@ static void igc_free_q_vector(struct igc_adapter *adapter, int v_idx)
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kfree_rcu(q_vector, rcu);
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}
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/* Need to wait a few seconds after link up to get diagnostic information from
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* the phy
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*/
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static void igc_update_phy_info(struct timer_list *t)
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{
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struct igc_adapter *adapter = from_timer(adapter, t, phy_info_timer);
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igc_get_phy_info(&adapter->hw);
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}
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/**
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* igc_has_link - check shared code for link and determine up/down
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* @adapter: pointer to driver private info
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*/
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static bool igc_has_link(struct igc_adapter *adapter)
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{
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struct igc_hw *hw = &adapter->hw;
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bool link_active = false;
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/* get_link_status is set on LSC (link status) interrupt or
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* rx sequence error interrupt. get_link_status will stay
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* false until the igc_check_for_link establishes link
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* for copper adapters ONLY
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*/
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switch (hw->phy.media_type) {
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case igc_media_type_copper:
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if (!hw->mac.get_link_status)
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return true;
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hw->mac.ops.check_for_link(hw);
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link_active = !hw->mac.get_link_status;
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break;
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default:
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case igc_media_type_unknown:
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break;
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}
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if (hw->mac.type == igc_i225 &&
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hw->phy.id == I225_I_PHY_ID) {
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if (!netif_carrier_ok(adapter->netdev)) {
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adapter->flags &= ~IGC_FLAG_NEED_LINK_UPDATE;
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} else if (!(adapter->flags & IGC_FLAG_NEED_LINK_UPDATE)) {
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adapter->flags |= IGC_FLAG_NEED_LINK_UPDATE;
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adapter->link_check_timeout = jiffies;
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}
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}
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return link_active;
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}
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/**
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* igc_watchdog - Timer Call-back
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* @data: pointer to adapter cast into an unsigned long
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@ -2304,6 +2354,183 @@ static void igc_free_q_vector(struct igc_adapter *adapter, int v_idx)
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static void igc_watchdog(struct timer_list *t)
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{
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struct igc_adapter *adapter = from_timer(adapter, t, watchdog_timer);
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/* Do the rest outside of interrupt context */
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schedule_work(&adapter->watchdog_task);
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}
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static void igc_watchdog_task(struct work_struct *work)
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{
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struct igc_adapter *adapter = container_of(work,
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struct igc_adapter,
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watchdog_task);
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struct net_device *netdev = adapter->netdev;
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struct igc_hw *hw = &adapter->hw;
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struct igc_phy_info *phy = &hw->phy;
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u16 phy_data, retry_count = 20;
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u32 connsw;
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u32 link;
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int i;
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link = igc_has_link(adapter);
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if (adapter->flags & IGC_FLAG_NEED_LINK_UPDATE) {
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if (time_after(jiffies, (adapter->link_check_timeout + HZ)))
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adapter->flags &= ~IGC_FLAG_NEED_LINK_UPDATE;
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else
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link = false;
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}
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/* Force link down if we have fiber to swap to */
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if (adapter->flags & IGC_FLAG_MAS_ENABLE) {
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if (hw->phy.media_type == igc_media_type_copper) {
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connsw = rd32(IGC_CONNSW);
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if (!(connsw & IGC_CONNSW_AUTOSENSE_EN))
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link = 0;
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}
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}
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if (link) {
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if (!netif_carrier_ok(netdev)) {
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u32 ctrl;
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hw->mac.ops.get_speed_and_duplex(hw,
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&adapter->link_speed,
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&adapter->link_duplex);
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ctrl = rd32(IGC_CTRL);
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/* Link status message must follow this format */
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netdev_info(netdev,
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"igc: %s NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n",
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netdev->name,
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adapter->link_speed,
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adapter->link_duplex == FULL_DUPLEX ?
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"Full" : "Half",
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(ctrl & IGC_CTRL_TFCE) &&
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(ctrl & IGC_CTRL_RFCE) ? "RX/TX" :
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(ctrl & IGC_CTRL_RFCE) ? "RX" :
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(ctrl & IGC_CTRL_TFCE) ? "TX" : "None");
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/* check if SmartSpeed worked */
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igc_check_downshift(hw);
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if (phy->speed_downgraded)
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netdev_warn(netdev, "Link Speed was downgraded by SmartSpeed\n");
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/* adjust timeout factor according to speed/duplex */
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adapter->tx_timeout_factor = 1;
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switch (adapter->link_speed) {
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case SPEED_10:
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adapter->tx_timeout_factor = 14;
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break;
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case SPEED_100:
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/* maybe add some timeout factor ? */
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break;
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}
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if (adapter->link_speed != SPEED_1000)
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goto no_wait;
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/* wait for Remote receiver status OK */
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retry_read_status:
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if (!igc_read_phy_reg(hw, PHY_1000T_STATUS,
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&phy_data)) {
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if (!(phy_data & SR_1000T_REMOTE_RX_STATUS) &&
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retry_count) {
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msleep(100);
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retry_count--;
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goto retry_read_status;
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} else if (!retry_count) {
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dev_err(&adapter->pdev->dev, "exceed max 2 second\n");
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}
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} else {
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dev_err(&adapter->pdev->dev, "read 1000Base-T Status Reg\n");
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}
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no_wait:
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netif_carrier_on(netdev);
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/* link state has changed, schedule phy info update */
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if (!test_bit(__IGC_DOWN, &adapter->state))
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mod_timer(&adapter->phy_info_timer,
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round_jiffies(jiffies + 2 * HZ));
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}
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} else {
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if (netif_carrier_ok(netdev)) {
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adapter->link_speed = 0;
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adapter->link_duplex = 0;
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/* Links status message must follow this format */
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netdev_info(netdev, "igc: %s NIC Link is Down\n",
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netdev->name);
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netif_carrier_off(netdev);
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/* link state has changed, schedule phy info update */
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if (!test_bit(__IGC_DOWN, &adapter->state))
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mod_timer(&adapter->phy_info_timer,
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round_jiffies(jiffies + 2 * HZ));
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/* link is down, time to check for alternate media */
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if (adapter->flags & IGC_FLAG_MAS_ENABLE) {
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if (adapter->flags & IGC_FLAG_MEDIA_RESET) {
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schedule_work(&adapter->reset_task);
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/* return immediately */
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return;
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}
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}
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/* also check for alternate media here */
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} else if (!netif_carrier_ok(netdev) &&
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(adapter->flags & IGC_FLAG_MAS_ENABLE)) {
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if (adapter->flags & IGC_FLAG_MEDIA_RESET) {
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schedule_work(&adapter->reset_task);
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/* return immediately */
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return;
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}
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}
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}
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spin_lock(&adapter->stats64_lock);
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igc_update_stats(adapter);
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spin_unlock(&adapter->stats64_lock);
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for (i = 0; i < adapter->num_tx_queues; i++) {
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struct igc_ring *tx_ring = adapter->tx_ring[i];
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if (!netif_carrier_ok(netdev)) {
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/* We've lost link, so the controller stops DMA,
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* but we've got queued Tx work that's never going
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* to get done, so reset controller to flush Tx.
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* (Do the reset outside of interrupt context).
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*/
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if (igc_desc_unused(tx_ring) + 1 < tx_ring->count) {
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adapter->tx_timeout_count++;
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schedule_work(&adapter->reset_task);
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/* return immediately since reset is imminent */
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return;
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}
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}
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/* Force detection of hung controller every watchdog period */
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set_bit(IGC_RING_FLAG_TX_DETECT_HANG, &tx_ring->flags);
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}
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/* Cause software interrupt to ensure Rx ring is cleaned */
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if (adapter->flags & IGC_FLAG_HAS_MSIX) {
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u32 eics = 0;
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for (i = 0; i < adapter->num_q_vectors; i++)
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eics |= adapter->q_vector[i]->eims_value;
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wr32(IGC_EICS, eics);
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} else {
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wr32(IGC_ICS, IGC_ICS_RXDMT0);
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}
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/* Reset the timer */
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if (!test_bit(__IGC_DOWN, &adapter->state)) {
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if (adapter->flags & IGC_FLAG_NEED_LINK_UPDATE)
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mod_timer(&adapter->watchdog_timer,
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round_jiffies(jiffies + HZ));
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else
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mod_timer(&adapter->watchdog_timer,
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round_jiffies(jiffies + 2 * HZ));
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}
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}
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/**
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@ -3152,6 +3379,7 @@ static int __igc_open(struct net_device *netdev, bool resuming)
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/* start the watchdog. */
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hw->mac.get_link_status = 1;
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schedule_work(&adapter->watchdog_task);
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return IGC_SUCCESS;
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@ -3427,8 +3655,10 @@ static int igc_probe(struct pci_dev *pdev,
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wr32(IGC_TXPBS, I225_TXPBSIZE_DEFAULT);
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timer_setup(&adapter->watchdog_timer, igc_watchdog, 0);
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timer_setup(&adapter->phy_info_timer, igc_update_phy_info, 0);
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INIT_WORK(&adapter->reset_task, igc_reset_task);
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INIT_WORK(&adapter->watchdog_task, igc_watchdog_task);
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/* Initialize link properties that are user-changeable */
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adapter->fc_autoneg = true;
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@ -3499,8 +3729,10 @@ static void igc_remove(struct pci_dev *pdev)
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set_bit(__IGC_DOWN, &adapter->state);
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del_timer_sync(&adapter->watchdog_timer);
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del_timer_sync(&adapter->phy_info_timer);
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cancel_work_sync(&adapter->reset_task);
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cancel_work_sync(&adapter->watchdog_task);
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/* Release control of h/w to f/w. If f/w is AMT enabled, this
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* would have already happened in close and is redundant.
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