From 6ac7439459606a57265800e60b14d58365ab19eb Mon Sep 17 00:00:00 2001 From: Don Skidmore Date: Wed, 17 Jun 2015 17:34:31 -0400 Subject: [PATCH] ixgbe: Add support for entering low power link up state When the device is closing or suspending, call ixgbe_enter_lplu to enter low power link up state on devices that support it. When this is done, prevent the phy from being reset in the ixgbe_down path so that link is present when calling ixgbe_enter_lplu. Signed-off-by: Don Skidmore Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 10 +- drivers/net/ethernet/intel/ixgbe/ixgbe_type.h | 34 ++++- drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c | 143 ++++++++++++++++++ 3 files changed, 185 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index dcf849ddb7ce..098c84955a11 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -5798,7 +5798,15 @@ static void ixgbe_close_suspend(struct ixgbe_adapter *adapter) { ixgbe_ptp_suspend(adapter); - ixgbe_down(adapter); + if (adapter->hw.phy.ops.enter_lplu) { + adapter->hw.phy.reset_disable = true; + ixgbe_down(adapter); + adapter->hw.phy.ops.enter_lplu(&adapter->hw); + adapter->hw.phy.reset_disable = false; + } else { + ixgbe_down(adapter); + } + ixgbe_free_irq(adapter); ixgbe_free_all_tx_resources(adapter); diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h index 0e678243abf7..19271e5d2010 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h @@ -848,6 +848,7 @@ struct ixgbe_thermal_sensor_data { #define IXGBE_MDIO_AUTO_NEG_LINK_STATUS 0x4 /* Indicates if link is up */ #define IXGBE_MDIO_AUTO_NEG_VENDOR_STATUS_MASK 0x7 /* Speed/Duplex Mask */ +#define IXGBE_MDIO_AUTO_NEG_VEN_STAT_SPEED_MASK 0x6 /* Speed Mask */ #define IXGBE_MDIO_AUTO_NEG_VENDOR_STATUS_10M_HALF 0x0 /* 10Mb/s Half Duplex */ #define IXGBE_MDIO_AUTO_NEG_VENDOR_STATUS_10M_FULL 0x1 /* 10Mb/s Full Duplex */ #define IXGBE_MDIO_AUTO_NEG_VENDOR_STATUS_100M_HALF 0x2 /* 100Mb/s H Duplex */ @@ -856,6 +857,24 @@ struct ixgbe_thermal_sensor_data { #define IXGBE_MDIO_AUTO_NEG_VENDOR_STATUS_1GB_FULL 0x5 /* 1Gb/s Full Duplex */ #define IXGBE_MDIO_AUTO_NEG_VENDOR_STATUS_10GB_HALF 0x6 /* 10Gb/s Half Duplex */ #define IXGBE_MDIO_AUTO_NEG_VENDOR_STATUS_10GB_FULL 0x7 /* 10Gb/s Full Duplex */ +#define IXGBE_MDIO_AUTO_NEG_VENDOR_STATUS_1GB 0x4 /* 1Gb/s */ +#define IXGBE_MDIO_AUTO_NEG_VENDOR_STATUS_10GB 0x6 /* 10Gb/s */ + +#define IXGBE_MII_10GBASE_T_AUTONEG_CTRL_REG 0x20 /* 10G Control Reg */ +#define IXGBE_MII_AUTONEG_VENDOR_PROVISION_1_REG 0xC400 /* 1G Provisioning 1 */ +#define IXGBE_MII_AUTONEG_XNP_TX_REG 0x17 /* 1G XNP Transmit */ +#define IXGBE_MII_AUTONEG_ADVERTISE_REG 0x10 /* 100M Advertisement */ +#define IXGBE_MII_10GBASE_T_ADVERTISE 0x1000 /* full duplex, bit:12*/ +#define IXGBE_MII_1GBASE_T_ADVERTISE_XNP_TX 0x4000 /* full duplex, bit:14*/ +#define IXGBE_MII_1GBASE_T_ADVERTISE 0x8000 /* full duplex, bit:15*/ +#define IXGBE_MII_2_5GBASE_T_ADVERTISE 0x0400 +#define IXGBE_MII_5GBASE_T_ADVERTISE 0x0800 +#define IXGBE_MII_100BASE_T_ADVERTISE 0x0100 /* full duplex, bit:8 */ +#define IXGBE_MII_100BASE_T_ADVERTISE_HALF 0x0080 /* half duplex, bit:7 */ +#define IXGBE_MII_RESTART 0x200 +#define IXGBE_MII_AUTONEG_COMPLETE 0x20 +#define IXGBE_MII_AUTONEG_LINK_UP 0x04 +#define IXGBE_MII_AUTONEG_REG 0x0 /* Management */ #define IXGBE_MAVTV(_i) (0x05010 + ((_i) * 4)) /* 8 of these (0-7) */ @@ -1305,6 +1324,7 @@ struct ixgbe_thermal_sensor_data { #define IXGBE_MDIO_AUTO_NEG_CONTROL 0x0 /* AUTO_NEG Control Reg */ #define IXGBE_MDIO_AUTO_NEG_STATUS 0x1 /* AUTO_NEG Status Reg */ #define IXGBE_MDIO_AUTO_NEG_VENDOR_STAT 0xC800 /* AUTO_NEG Vendor Status Reg */ +#define IXGBE_MDIO_AUTO_NEG_VENDOR_TX_ALARM 0xCC00 /* AUTO_NEG Vendor TX Reg */ #define IXGBE_MDIO_AUTO_NEG_VENDOR_TX_ALARM2 0xCC01 /* AUTO_NEG Vendor Tx Reg */ #define IXGBE_MDIO_AUTO_NEG_VEN_LSC 0x1 /* AUTO_NEG Vendor Tx LSC */ #define IXGBE_MDIO_AUTO_NEG_ADVT 0x10 /* AUTO_NEG Advt Reg */ @@ -1312,7 +1332,8 @@ struct ixgbe_thermal_sensor_data { #define IXGBE_MDIO_AUTO_NEG_EEE_ADVT 0x3C /* AUTO_NEG EEE Advt Reg */ #define IXGBE_MDIO_PHY_SET_LOW_POWER_MODE 0x0800 /* Set low power mode */ - +#define IXGBE_AUTO_NEG_LP_STATUS 0xE820 /* AUTO NEG Rx LP Status Reg */ +#define IXGBE_AUTO_NEG_LP_1000BASE_CAP 0x8000 /* AUTO NEG Rx LP 1000BaseT */ #define IXGBE_MDIO_TX_VENDOR_ALARMS_3 0xCC02 /* Vendor Alarms 3 Reg */ #define IXGBE_MDIO_TX_VENDOR_ALARMS_3_RST_MASK 0x3 /* PHY Reset Complete Mask */ #define IXGBE_MDIO_GLOBAL_RES_PR_10 0xC479 /* Global Resv Provisioning 10 Reg */ @@ -2041,6 +2062,11 @@ enum { #define IXGBE_NVM_POLL_WRITE 1 /* Flag for polling for write complete */ #define IXGBE_NVM_POLL_READ 0 /* Flag for polling for read complete */ +#define NVM_INIT_CTRL_3 0x38 +#define NVM_INIT_CTRL_3_LPLU 0x8 +#define NVM_INIT_CTRL_3_D10GMP_PORT0 0x40 +#define NVM_INIT_CTRL_3_D10GMP_PORT1 0x100 + #define IXGBE_EEPROM_PAGE_SIZE_MAX 128 #define IXGBE_EEPROM_RD_BUFFER_MAX_COUNT 512 /* EEPROM words # read in burst */ #define IXGBE_EEPROM_WR_BUFFER_MAX_COUNT 256 /* EEPROM words # wr in burst */ @@ -3301,6 +3327,7 @@ struct ixgbe_phy_operations { s32 (*write_i2c_combined)(struct ixgbe_hw *, u8 addr, u16 reg, u16 val); s32 (*check_overtemp)(struct ixgbe_hw *); s32 (*set_phy_power)(struct ixgbe_hw *, bool on); + s32 (*enter_lplu)(struct ixgbe_hw *); s32 (*handle_lasi)(struct ixgbe_hw *hw); }; @@ -3311,6 +3338,7 @@ struct ixgbe_eeprom_info { u16 word_size; u16 address_bits; u16 word_page_size; + u16 ctrl_word_3; }; #define IXGBE_FLAGS_DOUBLE_RESET_REQUIRED 0x01 @@ -3466,6 +3494,10 @@ struct ixgbe_info { #define IXGBE_ERR_FDIR_CMD_INCOMPLETE -38 #define IXGBE_NOT_IMPLEMENTED 0x7FFFFFFF +#define IXGBE_FUSES0_GROUP(_i) (0x11158 + ((_i) * 4)) +#define IXGBE_FUSES0_300MHZ BIT(5) +#define IXGBE_FUSES0_REV1 BIT(6) + #define IXGBE_KRM_PORT_CAR_GEN_CTRL(P) ((P) ? 0x8010 : 0x4010) #define IXGBE_KRM_LINK_CTRL_1(P) ((P) ? 0x820C : 0x420C) #define IXGBE_KRM_DSP_TXFFE_STATE_4(P) ((P) ? 0x8634 : 0x4634) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c index 662d2e896286..bbc5a2da86c4 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c @@ -1458,6 +1458,144 @@ static s32 ixgbe_reset_phy_t_X550em(struct ixgbe_hw *hw) return ixgbe_enable_lasi_ext_t_x550em(hw); } +/** ixgbe_get_lcd_x550em - Determine lowest common denominator + * @hw: pointer to hardware structure + * @lcd_speed: pointer to lowest common link speed + * + * Determine lowest common link speed with link partner. + **/ +static s32 ixgbe_get_lcd_t_x550em(struct ixgbe_hw *hw, + ixgbe_link_speed *lcd_speed) +{ + u16 an_lp_status; + s32 status; + u16 word = hw->eeprom.ctrl_word_3; + + *lcd_speed = IXGBE_LINK_SPEED_UNKNOWN; + + status = hw->phy.ops.read_reg(hw, IXGBE_AUTO_NEG_LP_STATUS, + IXGBE_MDIO_AUTO_NEG_DEV_TYPE, + &an_lp_status); + if (status) + return status; + + /* If link partner advertised 1G, return 1G */ + if (an_lp_status & IXGBE_AUTO_NEG_LP_1000BASE_CAP) { + *lcd_speed = IXGBE_LINK_SPEED_1GB_FULL; + return status; + } + + /* If 10G disabled for LPLU via NVM D10GMP, then return no valid LCD */ + if ((hw->bus.lan_id && (word & NVM_INIT_CTRL_3_D10GMP_PORT1)) || + (word & NVM_INIT_CTRL_3_D10GMP_PORT0)) + return status; + + /* Link partner not capable of lower speeds, return 10G */ + *lcd_speed = IXGBE_LINK_SPEED_10GB_FULL; + return status; +} + +/** ixgbe_enter_lplu_x550em - Transition to low power states + * @hw: pointer to hardware structure + * + * Configures Low Power Link Up on transition to low power states + * (from D0 to non-D0). Link is required to enter LPLU so avoid resetting + * the X557 PHY immediately prior to entering LPLU. + **/ +static s32 ixgbe_enter_lplu_t_x550em(struct ixgbe_hw *hw) +{ + u16 an_10g_cntl_reg, autoneg_reg, speed; + s32 status; + ixgbe_link_speed lcd_speed; + u32 save_autoneg; + bool link_up; + + /* SW LPLU not required on later HW revisions. */ + if (IXGBE_FUSES0_REV1 & IXGBE_READ_REG(hw, IXGBE_FUSES0_GROUP(0))) + return 0; + + /* If blocked by MNG FW, then don't restart AN */ + if (ixgbe_check_reset_blocked(hw)) + return 0; + + status = ixgbe_ext_phy_t_x550em_get_link(hw, &link_up); + if (status) + return status; + + status = hw->eeprom.ops.read(hw, NVM_INIT_CTRL_3, + &hw->eeprom.ctrl_word_3); + if (status) + return status; + + /* If link is down, LPLU disabled in NVM, WoL disabled, or + * manageability disabled, then force link down by entering + * low power mode. + */ + if (!link_up || !(hw->eeprom.ctrl_word_3 & NVM_INIT_CTRL_3_LPLU) || + !(hw->wol_enabled || ixgbe_mng_present(hw))) + return ixgbe_set_copper_phy_power(hw, false); + + /* Determine LCD */ + status = ixgbe_get_lcd_t_x550em(hw, &lcd_speed); + if (status) + return status; + + /* If no valid LCD link speed, then force link down and exit. */ + if (lcd_speed == IXGBE_LINK_SPEED_UNKNOWN) + return ixgbe_set_copper_phy_power(hw, false); + + status = hw->phy.ops.read_reg(hw, IXGBE_MDIO_AUTO_NEG_VENDOR_STAT, + IXGBE_MDIO_AUTO_NEG_DEV_TYPE, + &speed); + if (status) + return status; + + /* If no link now, speed is invalid so take link down */ + status = ixgbe_ext_phy_t_x550em_get_link(hw, &link_up); + if (status) + return ixgbe_set_copper_phy_power(hw, false); + + /* clear everything but the speed bits */ + speed &= IXGBE_MDIO_AUTO_NEG_VEN_STAT_SPEED_MASK; + + /* If current speed is already LCD, then exit. */ + if (((speed == IXGBE_MDIO_AUTO_NEG_VENDOR_STATUS_1GB) && + (lcd_speed == IXGBE_LINK_SPEED_1GB_FULL)) || + ((speed == IXGBE_MDIO_AUTO_NEG_VENDOR_STATUS_10GB) && + (lcd_speed == IXGBE_LINK_SPEED_10GB_FULL))) + return status; + + /* Clear AN completed indication */ + status = hw->phy.ops.read_reg(hw, IXGBE_MDIO_AUTO_NEG_VENDOR_TX_ALARM, + IXGBE_MDIO_AUTO_NEG_DEV_TYPE, + &autoneg_reg); + if (status) + return status; + + status = hw->phy.ops.read_reg(hw, IXGBE_MII_10GBASE_T_AUTONEG_CTRL_REG, + IXGBE_MDIO_AUTO_NEG_DEV_TYPE, + &an_10g_cntl_reg); + if (status) + return status; + + status = hw->phy.ops.read_reg(hw, + IXGBE_MII_AUTONEG_VENDOR_PROVISION_1_REG, + IXGBE_MDIO_AUTO_NEG_DEV_TYPE, + &autoneg_reg); + if (status) + return status; + + save_autoneg = hw->phy.autoneg_advertised; + + /* Setup link at least common link speed */ + status = hw->mac.ops.setup_link(hw, lcd_speed, false); + + /* restore autoneg from before setting lplu speed */ + hw->phy.autoneg_advertised = save_autoneg; + + return status; +} + /** ixgbe_init_phy_ops_X550em - PHY/SFP specific init * @hw: pointer to hardware structure * @@ -1528,6 +1666,11 @@ static s32 ixgbe_init_phy_ops_X550em(struct ixgbe_hw *hw) ret_val = ixgbe_setup_kr_speed_x550em(hw, speed); } + /* setup SW LPLU only for first revision */ + if (!(IXGBE_FUSES0_REV1 & IXGBE_READ_REG(hw, + IXGBE_FUSES0_GROUP(0)))) + phy->ops.enter_lplu = ixgbe_enter_lplu_t_x550em; + phy->ops.handle_lasi = ixgbe_handle_lasi_ext_t_x550em; phy->ops.reset = ixgbe_reset_phy_t_X550em; break; -- 2.20.1