igb: cleanup flow control configuration to make requested/current more clear
This patch cleans up the flow control configuration for igb to make it a bit more readable in regards to what the requested and current modes are. This should help with the maintainability of the current igb driver in regards to flow control. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
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2d94d8ab76
commit
0cce119aa9
5 changed files with 55 additions and 45 deletions
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@ -137,7 +137,7 @@ enum e1000_rev_polarity {
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e1000_rev_polarity_undefined = 0xFF
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};
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enum e1000_fc_type {
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enum e1000_fc_mode {
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e1000_fc_none = 0,
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e1000_fc_rx_pause,
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e1000_fc_tx_pause,
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@ -429,8 +429,8 @@ struct e1000_fc_info {
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u16 pause_time; /* Flow control pause timer */
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bool send_xon; /* Flow control send XON */
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bool strict_ieee; /* Strict IEEE mode */
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enum e1000_fc_type type; /* Type of flow control */
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enum e1000_fc_type original_type;
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enum e1000_fc_mode current_mode; /* Type of flow control */
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enum e1000_fc_mode requested_mode;
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};
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struct e1000_mbx_operations {
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@ -536,18 +536,24 @@ s32 igb_setup_link(struct e1000_hw *hw)
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if (igb_check_reset_block(hw))
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goto out;
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/*
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* If requested flow control is set to default, set flow control
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* based on the EEPROM flow control settings.
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*/
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if (hw->fc.requested_mode == e1000_fc_default) {
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ret_val = igb_set_default_fc(hw);
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if (ret_val)
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goto out;
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}
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/*
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* We want to save off the original Flow Control configuration just
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* in case we get disconnected and then reconnected into a different
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* hub or switch with different Flow Control capabilities.
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*/
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hw->fc.original_type = hw->fc.type;
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hw->fc.current_mode = hw->fc.requested_mode;
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hw_dbg("After fix-ups FlowControl is now = %x\n", hw->fc.type);
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hw_dbg("After fix-ups FlowControl is now = %x\n", hw->fc.current_mode);
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/* Call the necessary media_type subroutine to configure the link. */
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ret_val = hw->mac.ops.setup_physical_interface(hw);
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@ -614,7 +620,7 @@ static s32 igb_set_fc_watermarks(struct e1000_hw *hw)
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* ability to transmit pause frames is not enabled, then these
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* registers will be set to 0.
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*/
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if (hw->fc.type & e1000_fc_tx_pause) {
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if (hw->fc.current_mode & e1000_fc_tx_pause) {
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/*
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* We need to set up the Receive Threshold high and low water
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* marks as well as (optionally) enabling the transmission of
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@ -661,12 +667,12 @@ static s32 igb_set_default_fc(struct e1000_hw *hw)
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}
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if ((nvm_data & NVM_WORD0F_PAUSE_MASK) == 0)
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hw->fc.type = e1000_fc_none;
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hw->fc.requested_mode = e1000_fc_none;
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else if ((nvm_data & NVM_WORD0F_PAUSE_MASK) ==
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NVM_WORD0F_ASM_DIR)
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hw->fc.type = e1000_fc_tx_pause;
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hw->fc.requested_mode = e1000_fc_tx_pause;
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else
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hw->fc.type = e1000_fc_full;
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hw->fc.requested_mode = e1000_fc_full;
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out:
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return ret_val;
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@ -696,7 +702,7 @@ s32 igb_force_mac_fc(struct e1000_hw *hw)
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* receive flow control.
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*
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* The "Case" statement below enables/disable flow control
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* according to the "hw->fc.type" parameter.
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* according to the "hw->fc.current_mode" parameter.
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*
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* The possible values of the "fc" parameter are:
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* 0: Flow control is completely disabled
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@ -707,9 +713,9 @@ s32 igb_force_mac_fc(struct e1000_hw *hw)
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* 3: Both Rx and TX flow control (symmetric) is enabled.
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* other: No other values should be possible at this point.
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*/
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hw_dbg("hw->fc.type = %u\n", hw->fc.type);
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hw_dbg("hw->fc.current_mode = %u\n", hw->fc.current_mode);
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switch (hw->fc.type) {
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switch (hw->fc.current_mode) {
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case e1000_fc_none:
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ctrl &= (~(E1000_CTRL_TFCE | E1000_CTRL_RFCE));
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break;
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@ -857,11 +863,11 @@ s32 igb_config_fc_after_link_up(struct e1000_hw *hw)
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* ONLY. Hence, we must now check to see if we need to
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* turn OFF the TRANSMISSION of PAUSE frames.
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*/
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if (hw->fc.original_type == e1000_fc_full) {
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hw->fc.type = e1000_fc_full;
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if (hw->fc.requested_mode == e1000_fc_full) {
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hw->fc.current_mode = e1000_fc_full;
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hw_dbg("Flow Control = FULL.\r\n");
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} else {
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hw->fc.type = e1000_fc_rx_pause;
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hw->fc.current_mode = e1000_fc_rx_pause;
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hw_dbg("Flow Control = "
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"RX PAUSE frames only.\r\n");
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}
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@ -878,7 +884,7 @@ s32 igb_config_fc_after_link_up(struct e1000_hw *hw)
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(mii_nway_adv_reg & NWAY_AR_ASM_DIR) &&
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(mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE) &&
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(mii_nway_lp_ability_reg & NWAY_LPAR_ASM_DIR)) {
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hw->fc.type = e1000_fc_tx_pause;
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hw->fc.current_mode = e1000_fc_tx_pause;
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hw_dbg("Flow Control = TX PAUSE frames only.\r\n");
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}
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/*
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@ -893,7 +899,7 @@ s32 igb_config_fc_after_link_up(struct e1000_hw *hw)
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(mii_nway_adv_reg & NWAY_AR_ASM_DIR) &&
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!(mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE) &&
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(mii_nway_lp_ability_reg & NWAY_LPAR_ASM_DIR)) {
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hw->fc.type = e1000_fc_rx_pause;
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hw->fc.current_mode = e1000_fc_rx_pause;
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hw_dbg("Flow Control = RX PAUSE frames only.\r\n");
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}
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/*
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@ -917,13 +923,13 @@ s32 igb_config_fc_after_link_up(struct e1000_hw *hw)
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* be asked to delay transmission of packets than asking
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* our link partner to pause transmission of frames.
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*/
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else if ((hw->fc.original_type == e1000_fc_none ||
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hw->fc.original_type == e1000_fc_tx_pause) ||
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else if ((hw->fc.requested_mode == e1000_fc_none ||
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hw->fc.requested_mode == e1000_fc_tx_pause) ||
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hw->fc.strict_ieee) {
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hw->fc.type = e1000_fc_none;
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hw->fc.current_mode = e1000_fc_none;
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hw_dbg("Flow Control = NONE.\r\n");
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} else {
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hw->fc.type = e1000_fc_rx_pause;
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hw->fc.current_mode = e1000_fc_rx_pause;
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hw_dbg("Flow Control = RX PAUSE frames only.\r\n");
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}
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@ -939,7 +945,7 @@ s32 igb_config_fc_after_link_up(struct e1000_hw *hw)
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}
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if (duplex == HALF_DUPLEX)
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hw->fc.type = e1000_fc_none;
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hw->fc.current_mode = e1000_fc_none;
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/*
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* Now we call a subroutine to actually force the MAC
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@ -735,7 +735,7 @@ static s32 igb_phy_setup_autoneg(struct e1000_hw *hw)
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* other: No software override. The flow control configuration
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* in the EEPROM is used.
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*/
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switch (hw->fc.type) {
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switch (hw->fc.current_mode) {
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case e1000_fc_none:
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/*
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* Flow control (RX & TX) is completely disabled by a
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@ -992,7 +992,7 @@ static void igb_phy_force_speed_duplex_setup(struct e1000_hw *hw,
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u32 ctrl;
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/* Turn off flow control when forcing speed/duplex */
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hw->fc.type = e1000_fc_none;
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hw->fc.current_mode = e1000_fc_none;
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/* Force speed/duplex on the mac */
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ctrl = rd32(E1000_CTRL);
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@ -194,6 +194,8 @@ static int igb_set_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
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ADVERTISED_TP |
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ADVERTISED_Autoneg;
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ecmd->advertising = hw->phy.autoneg_advertised;
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if (adapter->fc_autoneg)
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hw->fc.requested_mode = e1000_fc_default;
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} else {
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if (igb_set_spd_dplx(adapter, ecmd->speed + ecmd->duplex)) {
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clear_bit(__IGB_RESETTING, &adapter->state);
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@ -221,11 +223,11 @@ static void igb_get_pauseparam(struct net_device *netdev,
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pause->autoneg =
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(adapter->fc_autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE);
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if (hw->fc.type == e1000_fc_rx_pause)
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if (hw->fc.current_mode == e1000_fc_rx_pause)
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pause->rx_pause = 1;
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else if (hw->fc.type == e1000_fc_tx_pause)
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else if (hw->fc.current_mode == e1000_fc_tx_pause)
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pause->tx_pause = 1;
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else if (hw->fc.type == e1000_fc_full) {
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else if (hw->fc.current_mode == e1000_fc_full) {
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pause->rx_pause = 1;
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pause->tx_pause = 1;
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}
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@ -243,26 +245,28 @@ static int igb_set_pauseparam(struct net_device *netdev,
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while (test_and_set_bit(__IGB_RESETTING, &adapter->state))
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msleep(1);
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if (pause->rx_pause && pause->tx_pause)
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hw->fc.type = e1000_fc_full;
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else if (pause->rx_pause && !pause->tx_pause)
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hw->fc.type = e1000_fc_rx_pause;
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else if (!pause->rx_pause && pause->tx_pause)
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hw->fc.type = e1000_fc_tx_pause;
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else if (!pause->rx_pause && !pause->tx_pause)
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hw->fc.type = e1000_fc_none;
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hw->fc.original_type = hw->fc.type;
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if (adapter->fc_autoneg == AUTONEG_ENABLE) {
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hw->fc.requested_mode = e1000_fc_default;
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if (netif_running(adapter->netdev)) {
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igb_down(adapter);
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igb_up(adapter);
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} else
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igb_reset(adapter);
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} else
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} else {
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if (pause->rx_pause && pause->tx_pause)
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hw->fc.requested_mode = e1000_fc_full;
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else if (pause->rx_pause && !pause->tx_pause)
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hw->fc.requested_mode = e1000_fc_rx_pause;
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else if (!pause->rx_pause && pause->tx_pause)
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hw->fc.requested_mode = e1000_fc_tx_pause;
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else if (!pause->rx_pause && !pause->tx_pause)
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hw->fc.requested_mode = e1000_fc_none;
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hw->fc.current_mode = hw->fc.requested_mode;
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retval = ((hw->phy.media_type == e1000_media_type_copper) ?
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igb_force_mac_fc(hw) : igb_setup_link(hw));
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}
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clear_bit(__IGB_RESETTING, &adapter->state);
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return retval;
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@ -1130,7 +1130,7 @@ void igb_reset(struct igb_adapter *adapter)
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}
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fc->pause_time = 0xFFFF;
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fc->send_xon = 1;
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fc->type = fc->original_type;
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fc->current_mode = fc->requested_mode;
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/* disable receive for all VFs and wait one second */
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if (adapter->vfs_allocated_count) {
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@ -1427,8 +1427,8 @@ static int __devinit igb_probe(struct pci_dev *pdev,
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hw->mac.autoneg = true;
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hw->phy.autoneg_advertised = 0x2f;
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hw->fc.original_type = e1000_fc_default;
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hw->fc.type = e1000_fc_default;
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hw->fc.requested_mode = e1000_fc_default;
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hw->fc.current_mode = e1000_fc_default;
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adapter->itr_setting = IGB_DEFAULT_ITR;
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adapter->itr = IGB_START_ITR;
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