From 8c7bbb925337705dd1459070ac620aeec6a29666 Mon Sep 17 00:00:00 2001 From: Bruce Allan Date: Wed, 16 Jun 2010 13:26:41 +0000 Subject: [PATCH] e1000e: separate out PHY statistics register updates The 82577/82578 parts have half-duplex statistics in PHY registers. These need only be read when in half-duplex and should all be read at once rather than one at a time to prevent excessive cycles of acquiring/releasing the PHY semaphore. Signed-off-by: Bruce Allan Tested-by: Jeff Pieper Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/e1000e/e1000.h | 1 + drivers/net/e1000e/ich8lan.c | 1 + drivers/net/e1000e/netdev.c | 171 +++++++++++++++++++++++++---------- 3 files changed, 126 insertions(+), 47 deletions(-) diff --git a/drivers/net/e1000e/e1000.h b/drivers/net/e1000e/e1000.h index c0b3db40bd73..79e7c4c18719 100644 --- a/drivers/net/e1000e/e1000.h +++ b/drivers/net/e1000e/e1000.h @@ -421,6 +421,7 @@ struct e1000_info { #define FLAG2_HAS_PHY_WAKEUP (1 << 1) #define FLAG2_IS_DISCARDING (1 << 2) #define FLAG2_DISABLE_ASPM_L1 (1 << 3) +#define FLAG2_HAS_PHY_STATS (1 << 4) #define E1000_RX_DESC_PS(R, i) \ (&(((union e1000_rx_desc_packet_split *)((R).desc))[i])) diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c index 5d8fad3bb203..70cd681fd1ce 100644 --- a/drivers/net/e1000e/ich8lan.c +++ b/drivers/net/e1000e/ich8lan.c @@ -3503,6 +3503,7 @@ struct e1000_info e1000_pch_info = { | FLAG_HAS_JUMBO_FRAMES | FLAG_DISABLE_FC_PAUSE_TIME /* errata */ | FLAG_APME_IN_WUC, + .flags2 = FLAG2_HAS_PHY_STATS, .pba = 26, .max_hw_frame_size = 4096, .get_variants = e1000_get_variants_ich8lan, diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c index 57a7e41da69e..b4c431d84516 100644 --- a/drivers/net/e1000e/netdev.c +++ b/drivers/net/e1000e/netdev.c @@ -3671,6 +3671,110 @@ static void e1000_update_phy_info(unsigned long data) schedule_work(&adapter->update_phy_task); } +/** + * e1000e_update_phy_stats - Update the PHY statistics counters + * @adapter: board private structure + **/ +static void e1000e_update_phy_stats(struct e1000_adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + s32 ret_val; + u16 phy_data; + + ret_val = hw->phy.ops.acquire(hw); + if (ret_val) + return; + + hw->phy.addr = 1; + +#define HV_PHY_STATS_PAGE 778 + /* + * A page set is expensive so check if already on desired page. + * If not, set to the page with the PHY status registers. + */ + ret_val = e1000e_read_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT, + &phy_data); + if (ret_val) + goto release; + if (phy_data != (HV_PHY_STATS_PAGE << IGP_PAGE_SHIFT)) { + ret_val = e1000e_write_phy_reg_mdic(hw, + IGP01E1000_PHY_PAGE_SELECT, + (HV_PHY_STATS_PAGE << + IGP_PAGE_SHIFT)); + if (ret_val) + goto release; + } + + /* Read/clear the upper 16-bit registers and read/accumulate lower */ + + /* Single Collision Count */ + e1000e_read_phy_reg_mdic(hw, HV_SCC_UPPER & MAX_PHY_REG_ADDRESS, + &phy_data); + ret_val = e1000e_read_phy_reg_mdic(hw, + HV_SCC_LOWER & MAX_PHY_REG_ADDRESS, + &phy_data); + if (!ret_val) + adapter->stats.scc += phy_data; + + /* Excessive Collision Count */ + e1000e_read_phy_reg_mdic(hw, HV_ECOL_UPPER & MAX_PHY_REG_ADDRESS, + &phy_data); + ret_val = e1000e_read_phy_reg_mdic(hw, + HV_ECOL_LOWER & MAX_PHY_REG_ADDRESS, + &phy_data); + if (!ret_val) + adapter->stats.ecol += phy_data; + + /* Multiple Collision Count */ + e1000e_read_phy_reg_mdic(hw, HV_MCC_UPPER & MAX_PHY_REG_ADDRESS, + &phy_data); + ret_val = e1000e_read_phy_reg_mdic(hw, + HV_MCC_LOWER & MAX_PHY_REG_ADDRESS, + &phy_data); + if (!ret_val) + adapter->stats.mcc += phy_data; + + /* Late Collision Count */ + e1000e_read_phy_reg_mdic(hw, HV_LATECOL_UPPER & MAX_PHY_REG_ADDRESS, + &phy_data); + ret_val = e1000e_read_phy_reg_mdic(hw, + HV_LATECOL_LOWER & + MAX_PHY_REG_ADDRESS, + &phy_data); + if (!ret_val) + adapter->stats.latecol += phy_data; + + /* Collision Count - also used for adaptive IFS */ + e1000e_read_phy_reg_mdic(hw, HV_COLC_UPPER & MAX_PHY_REG_ADDRESS, + &phy_data); + ret_val = e1000e_read_phy_reg_mdic(hw, + HV_COLC_LOWER & MAX_PHY_REG_ADDRESS, + &phy_data); + if (!ret_val) + hw->mac.collision_delta = phy_data; + + /* Defer Count */ + e1000e_read_phy_reg_mdic(hw, HV_DC_UPPER & MAX_PHY_REG_ADDRESS, + &phy_data); + ret_val = e1000e_read_phy_reg_mdic(hw, + HV_DC_LOWER & MAX_PHY_REG_ADDRESS, + &phy_data); + if (!ret_val) + adapter->stats.dc += phy_data; + + /* Transmit with no CRS */ + e1000e_read_phy_reg_mdic(hw, HV_TNCRS_UPPER & MAX_PHY_REG_ADDRESS, + &phy_data); + ret_val = e1000e_read_phy_reg_mdic(hw, + HV_TNCRS_LOWER & MAX_PHY_REG_ADDRESS, + &phy_data); + if (!ret_val) + adapter->stats.tncrs += phy_data; + +release: + hw->phy.ops.release(hw); +} + /** * e1000e_update_stats - Update the board statistics counters * @adapter: board private structure @@ -3680,7 +3784,6 @@ void e1000e_update_stats(struct e1000_adapter *adapter) struct net_device *netdev = adapter->netdev; struct e1000_hw *hw = &adapter->hw; struct pci_dev *pdev = adapter->pdev; - u16 phy_data; /* * Prevent stats update while adapter is being reset, or if the pci @@ -3700,34 +3803,27 @@ void e1000e_update_stats(struct e1000_adapter *adapter) adapter->stats.roc += er32(ROC); adapter->stats.mpc += er32(MPC); - if ((hw->phy.type == e1000_phy_82578) || - (hw->phy.type == e1000_phy_82577)) { - e1e_rphy(hw, HV_SCC_UPPER, &phy_data); - if (!e1e_rphy(hw, HV_SCC_LOWER, &phy_data)) - adapter->stats.scc += phy_data; - - e1e_rphy(hw, HV_ECOL_UPPER, &phy_data); - if (!e1e_rphy(hw, HV_ECOL_LOWER, &phy_data)) - adapter->stats.ecol += phy_data; - - e1e_rphy(hw, HV_MCC_UPPER, &phy_data); - if (!e1e_rphy(hw, HV_MCC_LOWER, &phy_data)) - adapter->stats.mcc += phy_data; - - e1e_rphy(hw, HV_LATECOL_UPPER, &phy_data); - if (!e1e_rphy(hw, HV_LATECOL_LOWER, &phy_data)) - adapter->stats.latecol += phy_data; - - e1e_rphy(hw, HV_DC_UPPER, &phy_data); - if (!e1e_rphy(hw, HV_DC_LOWER, &phy_data)) - adapter->stats.dc += phy_data; - } else { - adapter->stats.scc += er32(SCC); - adapter->stats.ecol += er32(ECOL); - adapter->stats.mcc += er32(MCC); - adapter->stats.latecol += er32(LATECOL); - adapter->stats.dc += er32(DC); + + /* Half-duplex statistics */ + if (adapter->link_duplex == HALF_DUPLEX) { + if (adapter->flags2 & FLAG2_HAS_PHY_STATS) { + e1000e_update_phy_stats(adapter); + } else { + adapter->stats.scc += er32(SCC); + adapter->stats.ecol += er32(ECOL); + adapter->stats.mcc += er32(MCC); + adapter->stats.latecol += er32(LATECOL); + adapter->stats.dc += er32(DC); + + hw->mac.collision_delta = er32(COLC); + + if ((hw->mac.type != e1000_82574) && + (hw->mac.type != e1000_82583)) + adapter->stats.tncrs += er32(TNCRS); + } + adapter->stats.colc += hw->mac.collision_delta; } + adapter->stats.xonrxc += er32(XONRXC); adapter->stats.xontxc += er32(XONTXC); adapter->stats.xoffrxc += er32(XOFFRXC); @@ -3745,28 +3841,9 @@ void e1000e_update_stats(struct e1000_adapter *adapter) hw->mac.tx_packet_delta = er32(TPT); adapter->stats.tpt += hw->mac.tx_packet_delta; - if ((hw->phy.type == e1000_phy_82578) || - (hw->phy.type == e1000_phy_82577)) { - e1e_rphy(hw, HV_COLC_UPPER, &phy_data); - if (!e1e_rphy(hw, HV_COLC_LOWER, &phy_data)) - hw->mac.collision_delta = phy_data; - } else { - hw->mac.collision_delta = er32(COLC); - } - adapter->stats.colc += hw->mac.collision_delta; adapter->stats.algnerrc += er32(ALGNERRC); adapter->stats.rxerrc += er32(RXERRC); - if ((hw->phy.type == e1000_phy_82578) || - (hw->phy.type == e1000_phy_82577)) { - e1e_rphy(hw, HV_TNCRS_UPPER, &phy_data); - if (!e1e_rphy(hw, HV_TNCRS_LOWER, &phy_data)) - adapter->stats.tncrs += phy_data; - } else { - if ((hw->mac.type != e1000_82574) && - (hw->mac.type != e1000_82583)) - adapter->stats.tncrs += er32(TNCRS); - } adapter->stats.cexterr += er32(CEXTERR); adapter->stats.tsctc += er32(TSCTC); adapter->stats.tsctfc += er32(TSCTFC); -- 2.30.2