From afdc71e4d6dc46d0f5bea7461ce356e6056f5ba8 Mon Sep 17 00:00:00 2001 From: Mark Rustad Date: Mon, 25 Jan 2016 16:32:10 -0800 Subject: [PATCH] ixgbe: Fix flow control for Xeon D KR backplane Xeon D KR backplane is different from other backplanes, in that we can't use auto-negotiation to determine the mode. Instead, use whatever the user configured. Signed-off-by: Mark Rustad Tested-by: Phil Schmitt Signed-off-by: Jeff Kirsher --- .../net/ethernet/intel/ixgbe/ixgbe_82598.c | 1 + .../net/ethernet/intel/ixgbe/ixgbe_82599.c | 1 + .../net/ethernet/intel/ixgbe/ixgbe_common.c | 8 +- .../net/ethernet/intel/ixgbe/ixgbe_common.h | 3 +- drivers/net/ethernet/intel/ixgbe/ixgbe_type.h | 5 ++ drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c | 1 + drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c | 86 ++++++++++++++++++- 7 files changed, 98 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_82598.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_82598.c index 9790d0274f7f..f47eb12a9c50 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_82598.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_82598.c @@ -1192,6 +1192,7 @@ static const struct ixgbe_mac_operations mac_ops_82598 = { .clear_vfta = &ixgbe_clear_vfta_82598, .set_vfta = &ixgbe_set_vfta_82598, .fc_enable = &ixgbe_fc_enable_82598, + .setup_fc = ixgbe_setup_fc_generic, .set_fw_drv_ver = NULL, .acquire_swfw_sync = &ixgbe_acquire_swfw_sync, .release_swfw_sync = &ixgbe_release_swfw_sync, diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c index b276fe0bc665..c3ae5a701d43 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c @@ -2220,6 +2220,7 @@ static const struct ixgbe_mac_operations mac_ops_82599 = { .clear_vfta = &ixgbe_clear_vfta_generic, .set_vfta = &ixgbe_set_vfta_generic, .fc_enable = &ixgbe_fc_enable_generic, + .setup_fc = ixgbe_setup_fc_generic, .set_fw_drv_ver = &ixgbe_set_fw_drv_ver_generic, .init_uta_tables = &ixgbe_init_uta_tables_generic, .setup_sfp = &ixgbe_setup_sfp_modules_82599, diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c index 64045053e874..8c7e78b21c4e 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c @@ -1,7 +1,7 @@ /******************************************************************************* Intel 10 Gigabit PCI Express Linux driver - Copyright(c) 1999 - 2015 Intel Corporation. + Copyright(c) 1999 - 2016 Intel Corporation. This program is free software; you can redistribute it and/or modify it under the terms and conditions of the GNU General Public License, @@ -111,12 +111,12 @@ bool ixgbe_device_supports_autoneg_fc(struct ixgbe_hw *hw) } /** - * ixgbe_setup_fc - Set up flow control + * ixgbe_setup_fc_generic - Set up flow control * @hw: pointer to hardware structure * * Called at init time to set up flow control. **/ -static s32 ixgbe_setup_fc(struct ixgbe_hw *hw) +s32 ixgbe_setup_fc_generic(struct ixgbe_hw *hw) { s32 ret_val = 0; u32 reg = 0, reg_bp = 0; @@ -296,7 +296,7 @@ s32 ixgbe_start_hw_generic(struct ixgbe_hw *hw) IXGBE_WRITE_FLUSH(hw); /* Setup flow control */ - ret_val = ixgbe_setup_fc(hw); + ret_val = hw->mac.ops.setup_fc(hw); if (ret_val) return ret_val; diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.h index 2b9563137fd8..2e290150ab54 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.h +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.h @@ -1,7 +1,7 @@ /******************************************************************************* Intel 10 Gigabit PCI Express Linux driver - Copyright(c) 1999 - 2014 Intel Corporation. + Copyright(c) 1999 - 2016 Intel Corporation. This program is free software; you can redistribute it and/or modify it under the terms and conditions of the GNU General Public License, @@ -81,6 +81,7 @@ s32 ixgbe_disable_rx_buff_generic(struct ixgbe_hw *hw); s32 ixgbe_enable_rx_buff_generic(struct ixgbe_hw *hw); s32 ixgbe_enable_rx_dma_generic(struct ixgbe_hw *hw, u32 regval); s32 ixgbe_fc_enable_generic(struct ixgbe_hw *hw); +s32 ixgbe_setup_fc_generic(struct ixgbe_hw *); bool ixgbe_device_supports_autoneg_fc(struct ixgbe_hw *hw); void ixgbe_fc_autoneg(struct ixgbe_hw *hw); diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h index 29e0b0e1cb67..787d2b21465e 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h @@ -3308,6 +3308,7 @@ struct ixgbe_mac_operations { /* Flow Control */ s32 (*fc_enable)(struct ixgbe_hw *); + s32 (*setup_fc)(struct ixgbe_hw *); /* Manageability interface */ s32 (*set_fw_drv_ver)(struct ixgbe_hw *, u8, u8, u8, u8); @@ -3525,6 +3526,7 @@ struct ixgbe_info { #define IXGBE_KRM_PORT_CAR_GEN_CTRL(P) ((P) ? 0x8010 : 0x4010) #define IXGBE_KRM_LINK_CTRL_1(P) ((P) ? 0x820C : 0x420C) +#define IXGBE_KRM_AN_CNTL_1(P) ((P) ? 0x822C : 0x422C) #define IXGBE_KRM_DSP_TXFFE_STATE_4(P) ((P) ? 0x8634 : 0x4634) #define IXGBE_KRM_DSP_TXFFE_STATE_5(P) ((P) ? 0x8638 : 0x4638) #define IXGBE_KRM_RX_TRN_LINKUP_CTRL(P) ((P) ? 0x8B00 : 0x4B00) @@ -3547,6 +3549,9 @@ struct ixgbe_info { #define IXGBE_KRM_LINK_CTRL_1_TETH_AN_ENABLE (1 << 29) #define IXGBE_KRM_LINK_CTRL_1_TETH_AN_RESTART (1 << 31) +#define IXGBE_KRM_AN_CNTL_1_SYM_PAUSE (1 << 28) +#define IXGBE_KRM_AN_CNTL_1_ASM_PAUSE (1 << 29) + #define IXGBE_KRM_DSP_TXFFE_STATE_C0_EN (1 << 6) #define IXGBE_KRM_DSP_TXFFE_STATE_CP1_CN1_EN (1 << 15) #define IXGBE_KRM_DSP_TXFFE_STATE_CO_ADAPT_EN (1 << 16) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c index 0d69564f3a1b..c00b67b4c1dc 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c @@ -846,6 +846,7 @@ static const struct ixgbe_mac_operations mac_ops_X540 = { .clear_vfta = &ixgbe_clear_vfta_generic, .set_vfta = &ixgbe_set_vfta_generic, .fc_enable = &ixgbe_fc_enable_generic, + .setup_fc = ixgbe_setup_fc_generic, .set_fw_drv_ver = &ixgbe_set_fw_drv_ver_generic, .init_uta_tables = &ixgbe_init_uta_tables_generic, .setup_sfp = NULL, diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c index 26e0b8df2afe..972c9aa17503 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c @@ -27,6 +27,7 @@ #include "ixgbe_phy.h" static s32 ixgbe_setup_kr_speed_x550em(struct ixgbe_hw *, ixgbe_link_speed); +static s32 ixgbe_setup_fc_x550em(struct ixgbe_hw *); static s32 ixgbe_get_invariants_X550_x(struct ixgbe_hw *hw) { @@ -1342,15 +1343,18 @@ static void ixgbe_init_mac_link_ops_X550em(struct ixgbe_hw *hw) mac->ops.enable_tx_laser = NULL; mac->ops.flap_tx_laser = NULL; mac->ops.setup_link = ixgbe_setup_mac_link_multispeed_fiber; + mac->ops.setup_fc = ixgbe_setup_fc_x550em; mac->ops.setup_mac_link = ixgbe_setup_mac_link_sfp_x550em; mac->ops.set_rate_select_speed = ixgbe_set_soft_rate_select_speed; break; case ixgbe_media_type_copper: mac->ops.setup_link = ixgbe_setup_mac_link_t_X550em; + mac->ops.setup_fc = ixgbe_setup_fc_generic; mac->ops.check_link = ixgbe_check_link_t_X550em; break; default: + mac->ops.setup_fc = ixgbe_setup_fc_x550em; break; } } @@ -1842,6 +1846,82 @@ static s32 ixgbe_get_lcd_t_x550em(struct ixgbe_hw *hw, return status; } +/** + * ixgbe_setup_fc_x550em - Set up flow control + * @hw: pointer to hardware structure + */ +static s32 ixgbe_setup_fc_x550em(struct ixgbe_hw *hw) +{ + bool pause, asm_dir; + u32 reg_val; + s32 rc; + + /* Validate the requested mode */ + if (hw->fc.strict_ieee && hw->fc.requested_mode == ixgbe_fc_rx_pause) { + hw_err(hw, "ixgbe_fc_rx_pause not valid in strict IEEE mode\n"); + return IXGBE_ERR_INVALID_LINK_SETTINGS; + } + + /* 10gig parts do not have a word in the EEPROM to determine the + * default flow control setting, so we explicitly set it to full. + */ + if (hw->fc.requested_mode == ixgbe_fc_default) + hw->fc.requested_mode = ixgbe_fc_full; + + /* Determine PAUSE and ASM_DIR bits. */ + switch (hw->fc.requested_mode) { + case ixgbe_fc_none: + pause = false; + asm_dir = false; + break; + case ixgbe_fc_tx_pause: + pause = false; + asm_dir = true; + break; + case ixgbe_fc_rx_pause: + /* Rx Flow control is enabled and Tx Flow control is + * disabled by software override. Since there really + * isn't a way to advertise that we are capable of RX + * Pause ONLY, we will advertise that we support both + * symmetric and asymmetric Rx PAUSE, as such we fall + * through to the fc_full statement. Later, we will + * disable the adapter's ability to send PAUSE frames. + */ + /* Fallthrough */ + case ixgbe_fc_full: + pause = true; + asm_dir = true; + break; + default: + hw_err(hw, "Flow control param set incorrectly\n"); + return IXGBE_ERR_CONFIG; + } + + if (hw->device_id != IXGBE_DEV_ID_X550EM_X_KR) + return 0; + + rc = ixgbe_read_iosf_sb_reg_x550(hw, + IXGBE_KRM_AN_CNTL_1(hw->bus.lan_id), + IXGBE_SB_IOSF_TARGET_KR_PHY, ®_val); + if (rc) + return rc; + + reg_val &= ~(IXGBE_KRM_AN_CNTL_1_SYM_PAUSE | + IXGBE_KRM_AN_CNTL_1_ASM_PAUSE); + if (pause) + reg_val |= IXGBE_KRM_AN_CNTL_1_SYM_PAUSE; + if (asm_dir) + reg_val |= IXGBE_KRM_AN_CNTL_1_ASM_PAUSE; + rc = ixgbe_write_iosf_sb_reg_x550(hw, + IXGBE_KRM_AN_CNTL_1(hw->bus.lan_id), + IXGBE_SB_IOSF_TARGET_KR_PHY, reg_val); + + /* This device does not fully support AN. */ + hw->fc.disable_fc_autoneg = true; + + return rc; +} + /** ixgbe_enter_lplu_x550em - Transition to low power states * @hw: pointer to hardware structure * @@ -2337,8 +2417,6 @@ static void ixgbe_release_swfw_sync_X550em(struct ixgbe_hw *hw, u32 mask) .enable_rx_buff = &ixgbe_enable_rx_buff_generic, \ .get_thermal_sensor_data = NULL, \ .init_thermal_sensor_thresh = NULL, \ - .prot_autoc_read = &prot_autoc_read_generic, \ - .prot_autoc_write = &prot_autoc_write_generic, \ .enable_rx = &ixgbe_enable_rx_generic, \ .disable_rx = &ixgbe_disable_rx_x550, \ @@ -2354,6 +2432,9 @@ static const struct ixgbe_mac_operations mac_ops_X550 = { .setup_sfp = NULL, .acquire_swfw_sync = &ixgbe_acquire_swfw_sync_X540, .release_swfw_sync = &ixgbe_release_swfw_sync_X540, + .prot_autoc_read = prot_autoc_read_generic, + .prot_autoc_write = prot_autoc_write_generic, + .setup_fc = ixgbe_setup_fc_generic, }; static const struct ixgbe_mac_operations mac_ops_X550EM_x = { @@ -2368,6 +2449,7 @@ static const struct ixgbe_mac_operations mac_ops_X550EM_x = { .setup_sfp = ixgbe_setup_sfp_modules_X550em, .acquire_swfw_sync = &ixgbe_acquire_swfw_sync_X550em, .release_swfw_sync = &ixgbe_release_swfw_sync_X550em, + .setup_fc = NULL, /* defined later */ }; #define X550_COMMON_EEP \