From: Mariusz Stachura <mariusz.stachura@intel.com>
Date: Tue, 14 Nov 2017 07:00:50 -0500
Subject: i40e: link_down_on_close private flag support
Patch-mainline: v4.17-rc1
Git-commit: c3880bd159d431d06b687b0b5ab22e24e6ef0070
References: bsc#1111981 FATE#326312 FATE#326313
This patch introduces new ethtool private flag used for
forcing true link state. Function i40e_force_link_state that implements
this functionality was added, it sets phy_type = 0 in order to
work-around firmware's LESM. False positive error messages were
suppressed.
The ndo_open() should not succeed if there were issues with forcing link
state to be UP.
Added I40E_PHY_TYPES_BITMASK define with all phy types OR-ed together in
one bitmask. Added after phy type definition, so it will be hard to
forget to include new phy types to the bitmask.
Signed-off-by: Mariusz Stachura <mariusz.stachura@intel.com>
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h | 37 ++++++++++
drivers/net/ethernet/intel/i40e/i40e_ethtool.c | 2
drivers/net/ethernet/intel/i40e/i40e_main.c | 75 ++++++++++++++++++++++
3 files changed, 114 insertions(+)
--- a/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h
@@ -1914,6 +1914,43 @@ enum i40e_aq_phy_type {
I40E_PHY_TYPE_DEFAULT = 0xFF,
};
+#define I40E_PHY_TYPES_BITMASK (BIT_ULL(I40E_PHY_TYPE_SGMII) | \
+ BIT_ULL(I40E_PHY_TYPE_1000BASE_KX) | \
+ BIT_ULL(I40E_PHY_TYPE_10GBASE_KX4) | \
+ BIT_ULL(I40E_PHY_TYPE_10GBASE_KR) | \
+ BIT_ULL(I40E_PHY_TYPE_40GBASE_KR4) | \
+ BIT_ULL(I40E_PHY_TYPE_XAUI) | \
+ BIT_ULL(I40E_PHY_TYPE_XFI) | \
+ BIT_ULL(I40E_PHY_TYPE_SFI) | \
+ BIT_ULL(I40E_PHY_TYPE_XLAUI) | \
+ BIT_ULL(I40E_PHY_TYPE_XLPPI) | \
+ BIT_ULL(I40E_PHY_TYPE_40GBASE_CR4_CU) | \
+ BIT_ULL(I40E_PHY_TYPE_10GBASE_CR1_CU) | \
+ BIT_ULL(I40E_PHY_TYPE_10GBASE_AOC) | \
+ BIT_ULL(I40E_PHY_TYPE_40GBASE_AOC) | \
+ BIT_ULL(I40E_PHY_TYPE_UNRECOGNIZED) | \
+ BIT_ULL(I40E_PHY_TYPE_UNSUPPORTED) | \
+ BIT_ULL(I40E_PHY_TYPE_100BASE_TX) | \
+ BIT_ULL(I40E_PHY_TYPE_1000BASE_T) | \
+ BIT_ULL(I40E_PHY_TYPE_10GBASE_T) | \
+ BIT_ULL(I40E_PHY_TYPE_10GBASE_SR) | \
+ BIT_ULL(I40E_PHY_TYPE_10GBASE_LR) | \
+ BIT_ULL(I40E_PHY_TYPE_10GBASE_SFPP_CU) | \
+ BIT_ULL(I40E_PHY_TYPE_10GBASE_CR1) | \
+ BIT_ULL(I40E_PHY_TYPE_40GBASE_CR4) | \
+ BIT_ULL(I40E_PHY_TYPE_40GBASE_SR4) | \
+ BIT_ULL(I40E_PHY_TYPE_40GBASE_LR4) | \
+ BIT_ULL(I40E_PHY_TYPE_1000BASE_SX) | \
+ BIT_ULL(I40E_PHY_TYPE_1000BASE_LX) | \
+ BIT_ULL(I40E_PHY_TYPE_1000BASE_T_OPTICAL) | \
+ BIT_ULL(I40E_PHY_TYPE_20GBASE_KR2) | \
+ BIT_ULL(I40E_PHY_TYPE_25GBASE_KR) | \
+ BIT_ULL(I40E_PHY_TYPE_25GBASE_CR) | \
+ BIT_ULL(I40E_PHY_TYPE_25GBASE_SR) | \
+ BIT_ULL(I40E_PHY_TYPE_25GBASE_LR) | \
+ BIT_ULL(I40E_PHY_TYPE_25GBASE_AOC) | \
+ BIT_ULL(I40E_PHY_TYPE_25GBASE_ACC))
+
#define I40E_LINK_SPEED_100MB_SHIFT 0x1
#define I40E_LINK_SPEED_1000MB_SHIFT 0x2
#define I40E_LINK_SPEED_10GB_SHIFT 0x3
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
@@ -230,6 +230,8 @@ static const struct i40e_priv_flags i40e
I40E_PRIV_FLAG("flow-director-atr", I40E_FLAG_FD_ATR_ENABLED, 0),
I40E_PRIV_FLAG("veb-stats", I40E_FLAG_VEB_STATS_ENABLED, 0),
I40E_PRIV_FLAG("hw-atr-eviction", I40E_FLAG_HW_ATR_EVICT_ENABLED, 0),
+ I40E_PRIV_FLAG("link-down-on-close",
+ I40E_FLAG_LINK_DOWN_ON_CLOSE_ENABLED, 0),
I40E_PRIV_FLAG("legacy-rx", I40E_FLAG_LEGACY_RX, 0),
I40E_PRIV_FLAG("disable-source-pruning",
I40E_FLAG_SOURCE_PRUNING_DISABLED, 0),
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -6547,6 +6547,75 @@ int i40e_up(struct i40e_vsi *vsi)
}
/**
+ * i40e_force_link_state - Force the link status
+ * @pf: board private structure
+ * @is_up: whether the link state should be forced up or down
+ **/
+static i40e_status i40e_force_link_state(struct i40e_pf *pf, bool is_up)
+{
+ struct i40e_aq_get_phy_abilities_resp abilities;
+ struct i40e_aq_set_phy_config config = {0};
+ struct i40e_hw *hw = &pf->hw;
+ i40e_status err;
+ u64 mask;
+
+ /* Get the current phy config */
+ err = i40e_aq_get_phy_capabilities(hw, false, false, &abilities,
+ NULL);
+ if (err) {
+ dev_err(&pf->pdev->dev,
+ "failed to get phy cap., ret = %s last_status = %s\n",
+ i40e_stat_str(hw, err),
+ i40e_aq_str(hw, hw->aq.asq_last_status));
+ return err;
+ }
+
+ /* If link needs to go up, but was not forced to go down,
+ * no need for a flap
+ */
+ if (is_up && abilities.phy_type != 0)
+ return I40E_SUCCESS;
+
+ /* To force link we need to set bits for all supported PHY types,
+ * but there are now more than 32, so we need to split the bitmap
+ * across two fields.
+ */
+ mask = I40E_PHY_TYPES_BITMASK;
+ config.phy_type = is_up ? cpu_to_le32((u32)(mask & 0xffffffff)) : 0;
+ config.phy_type_ext = is_up ? (u8)((mask >> 32) & 0xff) : 0;
+ /* Copy the old settings, except of phy_type */
+ config.abilities = abilities.abilities;
+ config.link_speed = abilities.link_speed;
+ config.eee_capability = abilities.eee_capability;
+ config.eeer = abilities.eeer_val;
+ config.low_power_ctrl = abilities.d3_lpan;
+ err = i40e_aq_set_phy_config(hw, &config, NULL);
+
+ if (err) {
+ dev_err(&pf->pdev->dev,
+ "set phy config ret = %s last_status = %s\n",
+ i40e_stat_str(&pf->hw, err),
+ i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
+ return err;
+ }
+
+ /* Update the link info */
+ err = i40e_update_link_info(hw);
+ if (err) {
+ /* Wait a little bit (on 40G cards it sometimes takes a really
+ * long time for link to come back from the atomic reset)
+ * and try once more
+ */
+ msleep(1000);
+ i40e_update_link_info(hw);
+ }
+
+ i40e_aq_set_link_restart_an(hw, true, NULL);
+
+ return I40E_SUCCESS;
+}
+
+/**
* i40e_down - Shutdown the connection processing
* @vsi: the VSI being stopped
**/
@@ -6563,6 +6632,9 @@ void i40e_down(struct i40e_vsi *vsi)
}
i40e_vsi_disable_irq(vsi);
i40e_vsi_stop_rings(vsi);
+ if (vsi->type == I40E_VSI_MAIN &&
+ vsi->back->flags & I40E_FLAG_LINK_DOWN_ON_CLOSE_ENABLED)
+ i40e_force_link_state(vsi->back, false);
i40e_napi_disable_all(vsi);
for (i = 0; i < vsi->num_queue_pairs; i++) {
@@ -7524,6 +7596,9 @@ int i40e_open(struct net_device *netdev)
netif_carrier_off(netdev);
+ if (i40e_force_link_state(pf, true))
+ return -EAGAIN;
+
err = i40e_vsi_open(vsi);
if (err)
return err;