From 2d0b0f693578109aff347e055d47f2797c802261 Mon Sep 17 00:00:00 2001 From: Nick Nunley Date: Wed, 17 Feb 2010 01:02:59 +0000 Subject: [PATCH] igb: remove adaptive IFS from driver Adaptive IFS support has been included in the igb driver since its initial release, but it is not a feature on any igb NICs. This patch removes it from the driver. Signed-off-by: Nicholas Nunley Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/igb/e1000_defines.h | 6 --- drivers/net/igb/e1000_hw.h | 7 ---- drivers/net/igb/e1000_mac.c | 70 --------------------------------- drivers/net/igb/e1000_mac.h | 2 - drivers/net/igb/igb_main.c | 10 +---- 5 files changed, 2 insertions(+), 93 deletions(-) diff --git a/drivers/net/igb/e1000_defines.h b/drivers/net/igb/e1000_defines.h index c01715070764..fe6cf1b696c7 100644 --- a/drivers/net/igb/e1000_defines.h +++ b/drivers/net/igb/e1000_defines.h @@ -313,12 +313,6 @@ #define E1000_PBA_34K 0x0022 #define E1000_PBA_64K 0x0040 /* 64KB */ -#define IFS_MAX 80 -#define IFS_MIN 40 -#define IFS_RATIO 4 -#define IFS_STEP 10 -#define MIN_NUM_XMITS 1000 - /* SW Semaphore Register */ #define E1000_SWSM_SMBI 0x00000001 /* Driver Semaphore bit */ #define E1000_SWSM_SWESMBI 0x00000002 /* FW Semaphore bit */ diff --git a/drivers/net/igb/e1000_hw.h b/drivers/net/igb/e1000_hw.h index dbaeb5f5e0c7..448005276b26 100644 --- a/drivers/net/igb/e1000_hw.h +++ b/drivers/net/igb/e1000_hw.h @@ -339,19 +339,12 @@ struct e1000_mac_info { enum e1000_mac_type type; - u32 collision_delta; u32 ledctl_default; u32 ledctl_mode1; u32 ledctl_mode2; u32 mc_filter_type; - u32 tx_packet_delta; u32 txcw; - u16 current_ifs_val; - u16 ifs_max_val; - u16 ifs_min_val; - u16 ifs_ratio; - u16 ifs_step_size; u16 mta_reg_count; u16 uta_reg_count; diff --git a/drivers/net/igb/e1000_mac.c b/drivers/net/igb/e1000_mac.c index 2ad358a240bf..2a8a886b37eb 100644 --- a/drivers/net/igb/e1000_mac.c +++ b/drivers/net/igb/e1000_mac.c @@ -1303,76 +1303,6 @@ out: return ret_val; } -/** - * igb_reset_adaptive - Reset Adaptive Interframe Spacing - * @hw: pointer to the HW structure - * - * Reset the Adaptive Interframe Spacing throttle to default values. - **/ -void igb_reset_adaptive(struct e1000_hw *hw) -{ - struct e1000_mac_info *mac = &hw->mac; - - if (!mac->adaptive_ifs) { - hw_dbg("Not in Adaptive IFS mode!\n"); - goto out; - } - - if (!mac->ifs_params_forced) { - mac->current_ifs_val = 0; - mac->ifs_min_val = IFS_MIN; - mac->ifs_max_val = IFS_MAX; - mac->ifs_step_size = IFS_STEP; - mac->ifs_ratio = IFS_RATIO; - } - - mac->in_ifs_mode = false; - wr32(E1000_AIT, 0); -out: - return; -} - -/** - * igb_update_adaptive - Update Adaptive Interframe Spacing - * @hw: pointer to the HW structure - * - * Update the Adaptive Interframe Spacing Throttle value based on the - * time between transmitted packets and time between collisions. - **/ -void igb_update_adaptive(struct e1000_hw *hw) -{ - struct e1000_mac_info *mac = &hw->mac; - - if (!mac->adaptive_ifs) { - hw_dbg("Not in Adaptive IFS mode!\n"); - goto out; - } - - if ((mac->collision_delta * mac->ifs_ratio) > mac->tx_packet_delta) { - if (mac->tx_packet_delta > MIN_NUM_XMITS) { - mac->in_ifs_mode = true; - if (mac->current_ifs_val < mac->ifs_max_val) { - if (!mac->current_ifs_val) - mac->current_ifs_val = mac->ifs_min_val; - else - mac->current_ifs_val += - mac->ifs_step_size; - wr32(E1000_AIT, - mac->current_ifs_val); - } - } - } else { - if (mac->in_ifs_mode && - (mac->tx_packet_delta <= MIN_NUM_XMITS)) { - mac->current_ifs_val = 0; - mac->in_ifs_mode = false; - wr32(E1000_AIT, 0); - } - } -out: - return; -} - /** * igb_validate_mdi_setting - Verify MDI/MDIx settings * @hw: pointer to the HW structure diff --git a/drivers/net/igb/e1000_mac.h b/drivers/net/igb/e1000_mac.h index bca17d882417..601be99711c2 100644 --- a/drivers/net/igb/e1000_mac.h +++ b/drivers/net/igb/e1000_mac.h @@ -67,8 +67,6 @@ void igb_mta_set(struct e1000_hw *hw, u32 hash_value); void igb_put_hw_semaphore(struct e1000_hw *hw); void igb_rar_set(struct e1000_hw *hw, u8 *addr, u32 index); s32 igb_check_alt_mac_addr(struct e1000_hw *hw); -void igb_reset_adaptive(struct e1000_hw *hw); -void igb_update_adaptive(struct e1000_hw *hw); bool igb_enable_mng_pass_thru(struct e1000_hw *hw); diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c index 30fb5a89c42d..eb48e1a084dd 100644 --- a/drivers/net/igb/igb_main.c +++ b/drivers/net/igb/igb_main.c @@ -1365,7 +1365,6 @@ void igb_reset(struct igb_adapter *adapter) /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ wr32(E1000_VET, ETHERNET_IEEE_VLAN_TYPE); - igb_reset_adaptive(hw); igb_get_phy_info(hw); } @@ -1508,7 +1507,6 @@ static int __devinit igb_probe(struct pci_dev *pdev, igb_get_bus_info_pcie(hw); hw->phy.autoneg_wait_to_complete = false; - hw->mac.adaptive_ifs = true; /* Copper options */ if (hw->phy.media_type == e1000_media_type_copper) { @@ -3159,7 +3157,6 @@ static void igb_watchdog_task(struct work_struct *work) } igb_update_stats(adapter); - igb_update_adaptive(hw); for (i = 0; i < adapter->num_tx_queues; i++) { struct igb_ring *tx_ring = adapter->tx_ring[i]; @@ -4064,11 +4061,8 @@ void igb_update_stats(struct igb_adapter *adapter) adapter->stats.mptc += rd32(E1000_MPTC); adapter->stats.bptc += rd32(E1000_BPTC); - /* used for adaptive IFS */ - hw->mac.tx_packet_delta = rd32(E1000_TPT); - adapter->stats.tpt += hw->mac.tx_packet_delta; - hw->mac.collision_delta = rd32(E1000_COLC); - adapter->stats.colc += hw->mac.collision_delta; + adapter->stats.tpt += rd32(E1000_TPT); + adapter->stats.colc += rd32(E1000_COLC); adapter->stats.algnerrc += rd32(E1000_ALGNERRC); adapter->stats.rxerrc += rd32(E1000_RXERRC); -- 2.20.1