[net-next v2 00/13][pull request] 1GbE Intel Wired LAN Driver Updates 2020-06-29

[net-next v2 00/13][pull request] 1GbE Intel Wired LAN Driver Updates 2020-06-29

[Jeff Kirsher]

This series contains updates to only the igc driver.

Sasha added Energy Efficient Ethernet (EEE) support and Latency Tolerance
Reporting (LTR) support for the igc driver. Added Low Power Idle (LPI)
counters and cleaned up unused TCP segmentation counters. Removed
igc_power_down_link() and call igc_power_down_phy_copper_base()
directly. Removed unneeded copper media check. 

Andre cleaned up timestamping by removing un-supported features and
duplicate code for i225. Fixed the timestamp check on the proper flag
instead of the skb for pending transmit timestamps. Refactored
igc_ptp_set_timestamp_mode() to simply the flow.

v2: Removed the log message in patch 1 as suggested by David Miller.
    Note: The locking issue Jakub Kicinski saw in patch 5, currently
    exists in the current net-next tree, so Andre will resolve the
    locking issue in a follow-on patch.

The following are changes since commit b8483ecaf72ee9059dcca5de969781028a550f89:
  liquidio: use list_empty_careful in lio_list_delete_head
and are available in the git repository at:
  git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue 1GbE

Andre Guedes (6):
  igc: Clean up Rx timestamping logic
  igc: Remove duplicate code in Tx timestamp handling
  igc: Check __IGC_PTP_TX_IN_PROGRESS instead of ptp_tx_skb
  igc: Remove UDP filter setup in PTP code
  igc: Refactor igc_ptp_set_timestamp_mode()
  igc: Fix Rx timestamp disabling

Sasha Neftin (7):
  igc: Add initial EEE support
  igc: Add initial LTR support
  igc: Add LPI counters
  igc: Remove TCP segmentation TX fail counter
  igc: Refactor the igc_power_down_link()
  igc: Remove unneeded check for copper media type
  igc: Remove checking media type during MAC initialization

 drivers/net/ethernet/intel/igc/igc.h         |   7 +-
 drivers/net/ethernet/intel/igc/igc_defines.h |  39 ++-
 drivers/net/ethernet/intel/igc/igc_ethtool.c |  95 +++++++
 drivers/net/ethernet/intel/igc/igc_hw.h      |   1 +
 drivers/net/ethernet/intel/igc/igc_i225.c    | 156 +++++++++++
 drivers/net/ethernet/intel/igc/igc_i225.h    |   3 +
 drivers/net/ethernet/intel/igc/igc_mac.c     |  16 +-
 drivers/net/ethernet/intel/igc/igc_main.c    |  48 ++--
 drivers/net/ethernet/intel/igc/igc_ptp.c     | 256 +++++--------------
 drivers/net/ethernet/intel/igc/igc_regs.h    |  16 +-
 10 files changed, 414 insertions(+), 223 deletions(-)

-- 
2.26.2

[net-next v2 01/13] igc: Add initial EEE support

[Jeff Kirsher]

From: Sasha Neftin <sasha.neftin@intel.com>

IEEE802.3az-2010 Energy Efficient Ethernet has been
approved as standard (September 2010) and the driver
can enable and disable it via ethtool.
Disable the feature by default on parts which support it.
Add enable/disable eee options.
tx-lpi, tx-timer and advertise not supported yet.

Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Reviewed-by: Andre Guedes <andre.guedes@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igc/igc.h         |  4 +
 drivers/net/ethernet/intel/igc/igc_defines.h | 10 +++
 drivers/net/ethernet/intel/igc/igc_ethtool.c | 95 ++++++++++++++++++++
 drivers/net/ethernet/intel/igc/igc_hw.h      |  1 +
 drivers/net/ethernet/intel/igc/igc_i225.c    | 56 ++++++++++++
 drivers/net/ethernet/intel/igc/igc_i225.h    |  2 +
 drivers/net/ethernet/intel/igc/igc_main.c    | 16 ++++
 drivers/net/ethernet/intel/igc/igc_regs.h    |  5 ++
 8 files changed, 189 insertions(+)

diff --git a/drivers/net/ethernet/intel/igc/igc.h b/drivers/net/ethernet/intel/igc/igc.h
index a2d260165df3..9c57afad6afe 100644
--- a/drivers/net/ethernet/intel/igc/igc.h
+++ b/drivers/net/ethernet/intel/igc/igc.h
@@ -117,6 +117,9 @@ struct igc_ring {
 struct igc_adapter {
 	struct net_device *netdev;
 
+	struct ethtool_eee eee;
+	u16 eee_advert;
+
 	unsigned long state;
 	unsigned int flags;
 	unsigned int num_q_vectors;
@@ -255,6 +258,7 @@ extern char igc_driver_name[];
 #define IGC_FLAG_MEDIA_RESET		BIT(10)
 #define IGC_FLAG_MAS_ENABLE		BIT(12)
 #define IGC_FLAG_HAS_MSIX		BIT(13)
+#define IGC_FLAG_EEE			BIT(14)
 #define IGC_FLAG_VLAN_PROMISC		BIT(15)
 #define IGC_FLAG_RX_LEGACY		BIT(16)
 #define IGC_FLAG_TSN_QBV_ENABLED	BIT(17)
diff --git a/drivers/net/ethernet/intel/igc/igc_defines.h b/drivers/net/ethernet/intel/igc/igc_defines.h
index 186deb1d9375..ee7fa1c062a0 100644
--- a/drivers/net/ethernet/intel/igc/igc_defines.h
+++ b/drivers/net/ethernet/intel/igc/igc_defines.h
@@ -511,4 +511,14 @@
 /* Maximum size of the MTA register table in all supported adapters */
 #define MAX_MTA_REG			128
 
+/* EEE defines */
+#define IGC_IPCNFG_EEE_2_5G_AN		0x00000010 /* IPCNFG EEE Ena 2.5G AN */
+#define IGC_IPCNFG_EEE_1G_AN		0x00000008 /* IPCNFG EEE Ena 1G AN */
+#define IGC_IPCNFG_EEE_100M_AN		0x00000004 /* IPCNFG EEE Ena 100M AN */
+#define IGC_EEER_EEE_NEG		0x20000000 /* EEE capability nego */
+#define IGC_EEER_TX_LPI_EN		0x00010000 /* EEER Tx LPI Enable */
+#define IGC_EEER_RX_LPI_EN		0x00020000 /* EEER Rx LPI Enable */
+#define IGC_EEER_LPI_FC			0x00040000 /* EEER Ena on Flow Cntrl */
+#define IGC_EEE_SU_LPI_CLK_STP		0x00800000 /* EEE LPI Clock Stop */
+
 #endif /* _IGC_DEFINES_H_ */
diff --git a/drivers/net/ethernet/intel/igc/igc_ethtool.c b/drivers/net/ethernet/intel/igc/igc_ethtool.c
index 735f3fb47dca..ac331116ea08 100644
--- a/drivers/net/ethernet/intel/igc/igc_ethtool.c
+++ b/drivers/net/ethernet/intel/igc/igc_ethtool.c
@@ -4,6 +4,7 @@
 /* ethtool support for igc */
 #include <linux/if_vlan.h>
 #include <linux/pm_runtime.h>
+#include <linux/mdio.h>
 
 #include "igc.h"
 #include "igc_diag.h"
@@ -1548,6 +1549,98 @@ static int igc_ethtool_set_priv_flags(struct net_device *netdev, u32 priv_flags)
 	return 0;
 }
 
+static int igc_ethtool_get_eee(struct net_device *netdev,
+			       struct ethtool_eee *edata)
+{
+	struct igc_adapter *adapter = netdev_priv(netdev);
+	struct igc_hw *hw = &adapter->hw;
+	u32 eeer;
+
+	if (hw->dev_spec._base.eee_enable)
+		edata->advertised =
+			mmd_eee_adv_to_ethtool_adv_t(adapter->eee_advert);
+
+	*edata = adapter->eee;
+	edata->supported = SUPPORTED_Autoneg;
+
+	eeer = rd32(IGC_EEER);
+
+	/* EEE status on negotiated link */
+	if (eeer & IGC_EEER_EEE_NEG)
+		edata->eee_active = true;
+
+	if (eeer & IGC_EEER_TX_LPI_EN)
+		edata->tx_lpi_enabled = true;
+
+	edata->eee_enabled = hw->dev_spec._base.eee_enable;
+
+	edata->advertised = SUPPORTED_Autoneg;
+	edata->lp_advertised = SUPPORTED_Autoneg;
+
+	/* Report correct negotiated EEE status for devices that
+	 * wrongly report EEE at half-duplex
+	 */
+	if (adapter->link_duplex == HALF_DUPLEX) {
+		edata->eee_enabled = false;
+		edata->eee_active = false;
+		edata->tx_lpi_enabled = false;
+		edata->advertised &= ~edata->advertised;
+	}
+
+	return 0;
+}
+
+static int igc_ethtool_set_eee(struct net_device *netdev,
+			       struct ethtool_eee *edata)
+{
+	struct igc_adapter *adapter = netdev_priv(netdev);
+	struct igc_hw *hw = &adapter->hw;
+	struct ethtool_eee eee_curr;
+	s32 ret_val;
+
+	memset(&eee_curr, 0, sizeof(struct ethtool_eee));
+
+	ret_val = igc_ethtool_get_eee(netdev, &eee_curr);
+	if (ret_val) {
+		netdev_err(netdev,
+			   "Problem setting EEE advertisement options\n");
+		return -EINVAL;
+	}
+
+	if (eee_curr.eee_enabled) {
+		if (eee_curr.tx_lpi_enabled != edata->tx_lpi_enabled) {
+			netdev_err(netdev,
+				   "Setting EEE tx-lpi is not supported\n");
+			return -EINVAL;
+		}
+
+		/* Tx LPI timer is not implemented currently */
+		if (edata->tx_lpi_timer) {
+			netdev_err(netdev,
+				   "Setting EEE Tx LPI timer is not supported\n");
+			return -EINVAL;
+		}
+	} else if (!edata->eee_enabled) {
+		netdev_err(netdev,
+			   "Setting EEE options are not supported with EEE disabled\n");
+		return -EINVAL;
+	}
+
+	adapter->eee_advert = ethtool_adv_to_mmd_eee_adv_t(edata->advertised);
+	if (hw->dev_spec._base.eee_enable != edata->eee_enabled) {
+		hw->dev_spec._base.eee_enable = edata->eee_enabled;
+		adapter->flags |= IGC_FLAG_EEE;
+
+		/* reset link */
+		if (netif_running(netdev))
+			igc_reinit_locked(adapter);
+		else
+			igc_reset(adapter);
+	}
+
+	return 0;
+}
+
 static int igc_ethtool_begin(struct net_device *netdev)
 {
 	struct igc_adapter *adapter = netdev_priv(netdev);
@@ -1829,6 +1922,8 @@ static const struct ethtool_ops igc_ethtool_ops = {
 	.set_channels		= igc_ethtool_set_channels,
 	.get_priv_flags		= igc_ethtool_get_priv_flags,
 	.set_priv_flags		= igc_ethtool_set_priv_flags,
+	.get_eee		= igc_ethtool_get_eee,
+	.set_eee		= igc_ethtool_set_eee,
 	.begin			= igc_ethtool_begin,
 	.complete		= igc_ethtool_complete,
 	.get_link_ksettings	= igc_ethtool_get_link_ksettings,
diff --git a/drivers/net/ethernet/intel/igc/igc_hw.h b/drivers/net/ethernet/intel/igc/igc_hw.h
index af34ae310327..2ab7d9fab6af 100644
--- a/drivers/net/ethernet/intel/igc/igc_hw.h
+++ b/drivers/net/ethernet/intel/igc/igc_hw.h
@@ -191,6 +191,7 @@ struct igc_fc_info {
 
 struct igc_dev_spec_base {
 	bool clear_semaphore_once;
+	bool eee_enable;
 };
 
 struct igc_hw {
diff --git a/drivers/net/ethernet/intel/igc/igc_i225.c b/drivers/net/ethernet/intel/igc/igc_i225.c
index c25f555aaf82..3a4e982edb67 100644
--- a/drivers/net/ethernet/intel/igc/igc_i225.c
+++ b/drivers/net/ethernet/intel/igc/igc_i225.c
@@ -488,3 +488,59 @@ s32 igc_init_nvm_params_i225(struct igc_hw *hw)
 	}
 	return 0;
 }
+
+/**
+ *  igc_set_eee_i225 - Enable/disable EEE support
+ *  @hw: pointer to the HW structure
+ *  @adv2p5G: boolean flag enabling 2.5G EEE advertisement
+ *  @adv1G: boolean flag enabling 1G EEE advertisement
+ *  @adv100M: boolean flag enabling 100M EEE advertisement
+ *
+ *  Enable/disable EEE based on setting in dev_spec structure.
+ **/
+s32 igc_set_eee_i225(struct igc_hw *hw, bool adv2p5G, bool adv1G,
+		     bool adv100M)
+{
+	u32 ipcnfg, eeer;
+
+	ipcnfg = rd32(IGC_IPCNFG);
+	eeer = rd32(IGC_EEER);
+
+	/* enable or disable per user setting */
+	if (hw->dev_spec._base.eee_enable) {
+		u32 eee_su = rd32(IGC_EEE_SU);
+
+		if (adv100M)
+			ipcnfg |= IGC_IPCNFG_EEE_100M_AN;
+		else
+			ipcnfg &= ~IGC_IPCNFG_EEE_100M_AN;
+
+		if (adv1G)
+			ipcnfg |= IGC_IPCNFG_EEE_1G_AN;
+		else
+			ipcnfg &= ~IGC_IPCNFG_EEE_1G_AN;
+
+		if (adv2p5G)
+			ipcnfg |= IGC_IPCNFG_EEE_2_5G_AN;
+		else
+			ipcnfg &= ~IGC_IPCNFG_EEE_2_5G_AN;
+
+		eeer |= (IGC_EEER_TX_LPI_EN | IGC_EEER_RX_LPI_EN |
+			 IGC_EEER_LPI_FC);
+
+		/* This bit should not be set in normal operation. */
+		if (eee_su & IGC_EEE_SU_LPI_CLK_STP)
+			hw_dbg("LPI Clock Stop Bit should not be set!\n");
+	} else {
+		ipcnfg &= ~(IGC_IPCNFG_EEE_2_5G_AN | IGC_IPCNFG_EEE_1G_AN |
+			    IGC_IPCNFG_EEE_100M_AN);
+		eeer &= ~(IGC_EEER_TX_LPI_EN | IGC_EEER_RX_LPI_EN |
+			  IGC_EEER_LPI_FC);
+	}
+	wr32(IGC_IPCNFG, ipcnfg);
+	wr32(IGC_EEER, eeer);
+	rd32(IGC_IPCNFG);
+	rd32(IGC_EEER);
+
+	return IGC_SUCCESS;
+}
diff --git a/drivers/net/ethernet/intel/igc/igc_i225.h b/drivers/net/ethernet/intel/igc/igc_i225.h
index 7b66e1f9c0e6..04759e076a9e 100644
--- a/drivers/net/ethernet/intel/igc/igc_i225.h
+++ b/drivers/net/ethernet/intel/igc/igc_i225.h
@@ -9,5 +9,7 @@ void igc_release_swfw_sync_i225(struct igc_hw *hw, u16 mask);
 
 s32 igc_init_nvm_params_i225(struct igc_hw *hw);
 bool igc_get_flash_presence_i225(struct igc_hw *hw);
+s32 igc_set_eee_i225(struct igc_hw *hw, bool adv2p5G, bool adv1G,
+		     bool adv100M);
 
 #endif
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index c2f41a558fd6..7e4d56c7b4c4 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -102,6 +102,9 @@ void igc_reset(struct igc_adapter *adapter)
 	if (hw->mac.ops.init_hw(hw))
 		netdev_err(dev, "Error on hardware initialization\n");
 
+	/* Re-establish EEE setting */
+	igc_set_eee_i225(hw, true, true, true);
+
 	if (!netif_running(adapter->netdev))
 		igc_power_down_link(adapter);
 
@@ -4252,6 +4255,15 @@ static void igc_watchdog_task(struct work_struct *work)
 				    (ctrl & IGC_CTRL_RFCE) ?  "RX" :
 				    (ctrl & IGC_CTRL_TFCE) ?  "TX" : "None");
 
+			/* disable EEE if enabled */
+			if ((adapter->flags & IGC_FLAG_EEE) &&
+			    adapter->link_duplex == HALF_DUPLEX) {
+				netdev_info(netdev,
+					    "EEE Disabled: unsupported at half duplex. Re-enable using ethtool when at full duplex\n");
+				adapter->hw.dev_spec._base.eee_enable = false;
+				adapter->flags &= ~IGC_FLAG_EEE;
+			}
+
 			/* check if SmartSpeed worked */
 			igc_check_downshift(hw);
 			if (phy->speed_downgraded)
@@ -5182,6 +5194,10 @@ static int igc_probe(struct pci_dev *pdev,
 	netdev_info(netdev, "MAC: %pM\n", netdev->dev_addr);
 
 	dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
+	/* Disable EEE for internal PHY devices */
+	hw->dev_spec._base.eee_enable = false;
+	adapter->flags &= ~IGC_FLAG_EEE;
+	igc_set_eee_i225(hw, false, false, false);
 
 	pm_runtime_put_noidle(&pdev->dev);
 
diff --git a/drivers/net/ethernet/intel/igc/igc_regs.h b/drivers/net/ethernet/intel/igc/igc_regs.h
index 232e82dec62e..75e040a5d46f 100644
--- a/drivers/net/ethernet/intel/igc/igc_regs.h
+++ b/drivers/net/ethernet/intel/igc/igc_regs.h
@@ -248,6 +248,11 @@
 /* Wake Up packet memory */
 #define IGC_WUPM_REG(_i)	(0x05A00 + ((_i) * 4))
 
+/* Energy Efficient Ethernet "EEE" registers */
+#define IGC_EEER	0x0E30 /* Energy Efficient Ethernet "EEE"*/
+#define IGC_IPCNFG	0x0E38 /* Internal PHY Configuration */
+#define IGC_EEE_SU	0x0E34 /* EEE Setup */
+
 /* forward declaration */
 struct igc_hw;
 u32 igc_rd32(struct igc_hw *hw, u32 reg);
-- 
2.26.2

[net-next v2 02/13] igc: Add initial LTR support

[Jeff Kirsher]

From: Sasha Neftin <sasha.neftin@intel.com>

The LTR message on the PCIe inform the requested latency
on which the PCIe must become active to the downstream
PCIe port of the system.
This patch provide recommended LTR parameters by i225
specification.

Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igc/igc_defines.h |  27 +++++
 drivers/net/ethernet/intel/igc/igc_i225.c    | 100 +++++++++++++++++++
 drivers/net/ethernet/intel/igc/igc_i225.h    |   1 +
 drivers/net/ethernet/intel/igc/igc_mac.c     |   5 +
 drivers/net/ethernet/intel/igc/igc_regs.h    |   6 ++
 5 files changed, 139 insertions(+)

diff --git a/drivers/net/ethernet/intel/igc/igc_defines.h b/drivers/net/ethernet/intel/igc/igc_defines.h
index ee7fa1c062a0..ed0e560daaae 100644
--- a/drivers/net/ethernet/intel/igc/igc_defines.h
+++ b/drivers/net/ethernet/intel/igc/igc_defines.h
@@ -521,4 +521,31 @@
 #define IGC_EEER_LPI_FC			0x00040000 /* EEER Ena on Flow Cntrl */
 #define IGC_EEE_SU_LPI_CLK_STP		0x00800000 /* EEE LPI Clock Stop */
 
+/* LTR defines */
+#define IGC_LTRC_EEEMS_EN		0x00000020 /* Enable EEE LTR max send */
+#define IGC_RXPBS_SIZE_I225_MASK	0x0000003F /* Rx packet buffer size */
+#define IGC_TW_SYSTEM_1000_MASK		0x000000FF
+/* Minimum time for 100BASE-T where no data will be transmit following move out
+ * of EEE LPI Tx state
+ */
+#define IGC_TW_SYSTEM_100_MASK		0x0000FF00
+#define IGC_TW_SYSTEM_100_SHIFT		8
+#define IGC_DMACR_DMAC_EN		0x80000000 /* Enable DMA Coalescing */
+#define IGC_DMACR_DMACTHR_MASK		0x00FF0000
+#define IGC_DMACR_DMACTHR_SHIFT		16
+/* Reg val to set scale to 1024 nsec */
+#define IGC_LTRMINV_SCALE_1024		2
+/* Reg val to set scale to 32768 nsec */
+#define IGC_LTRMINV_SCALE_32768		3
+/* Reg val to set scale to 1024 nsec */
+#define IGC_LTRMAXV_SCALE_1024		2
+/* Reg val to set scale to 32768 nsec */
+#define IGC_LTRMAXV_SCALE_32768		3
+#define IGC_LTRMINV_LTRV_MASK		0x000003FF /* LTR minimum value */
+#define IGC_LTRMAXV_LTRV_MASK		0x000003FF /* LTR maximum value */
+#define IGC_LTRMINV_LSNP_REQ		0x00008000 /* LTR Snoop Requirement */
+#define IGC_LTRMINV_SCALE_SHIFT		10
+#define IGC_LTRMAXV_LSNP_REQ		0x00008000 /* LTR Snoop Requirement */
+#define IGC_LTRMAXV_SCALE_SHIFT		10
+
 #endif /* _IGC_DEFINES_H_ */
diff --git a/drivers/net/ethernet/intel/igc/igc_i225.c b/drivers/net/ethernet/intel/igc/igc_i225.c
index 3a4e982edb67..8b67d9b49a83 100644
--- a/drivers/net/ethernet/intel/igc/igc_i225.c
+++ b/drivers/net/ethernet/intel/igc/igc_i225.c
@@ -544,3 +544,103 @@ s32 igc_set_eee_i225(struct igc_hw *hw, bool adv2p5G, bool adv1G,
 
 	return IGC_SUCCESS;
 }
+
+/* igc_set_ltr_i225 - Set Latency Tolerance Reporting thresholds
+ * @hw: pointer to the HW structure
+ * @link: bool indicating link status
+ *
+ * Set the LTR thresholds based on the link speed (Mbps), EEE, and DMAC
+ * settings, otherwise specify that there is no LTR requirement.
+ */
+s32 igc_set_ltr_i225(struct igc_hw *hw, bool link)
+{
+	u32 tw_system, ltrc, ltrv, ltr_min, ltr_max, scale_min, scale_max;
+	u16 speed, duplex;
+	s32 size;
+
+	/* If we do not have link, LTR thresholds are zero. */
+	if (link) {
+		hw->mac.ops.get_speed_and_duplex(hw, &speed, &duplex);
+
+		/* Check if using copper interface with EEE enabled or if the
+		 * link speed is 10 Mbps.
+		 */
+		if (hw->dev_spec._base.eee_enable &&
+		    speed != SPEED_10) {
+			/* EEE enabled, so send LTRMAX threshold. */
+			ltrc = rd32(IGC_LTRC) |
+			       IGC_LTRC_EEEMS_EN;
+			wr32(IGC_LTRC, ltrc);
+
+			/* Calculate tw_system (nsec). */
+			if (speed == SPEED_100) {
+				tw_system = ((rd32(IGC_EEE_SU) &
+					     IGC_TW_SYSTEM_100_MASK) >>
+					     IGC_TW_SYSTEM_100_SHIFT) * 500;
+			} else {
+				tw_system = (rd32(IGC_EEE_SU) &
+					     IGC_TW_SYSTEM_1000_MASK) * 500;
+			}
+		} else {
+			tw_system = 0;
+		}
+
+		/* Get the Rx packet buffer size. */
+		size = rd32(IGC_RXPBS) &
+		       IGC_RXPBS_SIZE_I225_MASK;
+
+		/* Calculations vary based on DMAC settings. */
+		if (rd32(IGC_DMACR) & IGC_DMACR_DMAC_EN) {
+			size -= (rd32(IGC_DMACR) &
+				 IGC_DMACR_DMACTHR_MASK) >>
+				 IGC_DMACR_DMACTHR_SHIFT;
+			/* Convert size to bits. */
+			size *= 1024 * 8;
+		} else {
+			/* Convert size to bytes, subtract the MTU, and then
+			 * convert the size to bits.
+			 */
+			size *= 1024;
+			size *= 8;
+		}
+
+		if (size < 0) {
+			hw_dbg("Invalid effective Rx buffer size %d\n",
+			       size);
+			return -IGC_ERR_CONFIG;
+		}
+
+		/* Calculate the thresholds. Since speed is in Mbps, simplify
+		 * the calculation by multiplying size/speed by 1000 for result
+		 * to be in nsec before dividing by the scale in nsec. Set the
+		 * scale such that the LTR threshold fits in the register.
+		 */
+		ltr_min = (1000 * size) / speed;
+		ltr_max = ltr_min + tw_system;
+		scale_min = (ltr_min / 1024) < 1024 ? IGC_LTRMINV_SCALE_1024 :
+			    IGC_LTRMINV_SCALE_32768;
+		scale_max = (ltr_max / 1024) < 1024 ? IGC_LTRMAXV_SCALE_1024 :
+			    IGC_LTRMAXV_SCALE_32768;
+		ltr_min /= scale_min == IGC_LTRMINV_SCALE_1024 ? 1024 : 32768;
+		ltr_min -= 1;
+		ltr_max /= scale_max == IGC_LTRMAXV_SCALE_1024 ? 1024 : 32768;
+		ltr_max -= 1;
+
+		/* Only write the LTR thresholds if they differ from before. */
+		ltrv = rd32(IGC_LTRMINV);
+		if (ltr_min != (ltrv & IGC_LTRMINV_LTRV_MASK)) {
+			ltrv = IGC_LTRMINV_LSNP_REQ | ltr_min |
+			       (scale_min << IGC_LTRMINV_SCALE_SHIFT);
+			wr32(IGC_LTRMINV, ltrv);
+		}
+
+		ltrv = rd32(IGC_LTRMAXV);
+		if (ltr_max != (ltrv & IGC_LTRMAXV_LTRV_MASK)) {
+			ltrv = IGC_LTRMAXV_LSNP_REQ | ltr_max |
+			       (scale_min << IGC_LTRMAXV_SCALE_SHIFT);
+			wr32(IGC_LTRMAXV, ltrv);
+		}
+	}
+
+	return IGC_SUCCESS;
+}
diff --git a/drivers/net/ethernet/intel/igc/igc_i225.h b/drivers/net/ethernet/intel/igc/igc_i225.h
index 04759e076a9e..dae47e4f16b0 100644
--- a/drivers/net/ethernet/intel/igc/igc_i225.h
+++ b/drivers/net/ethernet/intel/igc/igc_i225.h
@@ -11,5 +11,6 @@ s32 igc_init_nvm_params_i225(struct igc_hw *hw);
 bool igc_get_flash_presence_i225(struct igc_hw *hw);
 s32 igc_set_eee_i225(struct igc_hw *hw, bool adv2p5G, bool adv1G,
 		     bool adv100M);
+s32 igc_set_ltr_i225(struct igc_hw *hw, bool link);
 
 #endif
diff --git a/drivers/net/ethernet/intel/igc/igc_mac.c b/drivers/net/ethernet/intel/igc/igc_mac.c
index 410aeb01de5c..bc077f230f17 100644
--- a/drivers/net/ethernet/intel/igc/igc_mac.c
+++ b/drivers/net/ethernet/intel/igc/igc_mac.c
@@ -417,6 +417,11 @@ s32 igc_check_for_copper_link(struct igc_hw *hw)
 		hw_dbg("Error configuring flow control\n");
 
 out:
+	/* Now that we are aware of our link settings, we can set the LTR
+	 * thresholds.
+	 */
+	ret_val = igc_set_ltr_i225(hw, link);
+
 	return ret_val;
 }
 
diff --git a/drivers/net/ethernet/intel/igc/igc_regs.h b/drivers/net/ethernet/intel/igc/igc_regs.h
index 75e040a5d46f..97f9b928509f 100644
--- a/drivers/net/ethernet/intel/igc/igc_regs.h
+++ b/drivers/net/ethernet/intel/igc/igc_regs.h
@@ -253,6 +253,12 @@
 #define IGC_IPCNFG	0x0E38 /* Internal PHY Configuration */
 #define IGC_EEE_SU	0x0E34 /* EEE Setup */
 
+/* LTR registers */
+#define IGC_LTRC	0x01A0 /* Latency Tolerance Reporting Control */
+#define IGC_DMACR	0x02508 /* DMA Coalescing Control Register */
+#define IGC_LTRMINV	0x5BB0 /* LTR Minimum Value */
+#define IGC_LTRMAXV	0x5BB4 /* LTR Maximum Value */
+
 /* forward declaration */
 struct igc_hw;
 u32 igc_rd32(struct igc_hw *hw, u32 reg);
-- 
2.26.2

[net-next v2 03/13] igc: Clean up Rx timestamping logic

[Jeff Kirsher]

From: Andre Guedes <andre.guedes@intel.com>

Differently from I210, I225 doesn't report Rx timestamps via the TS bit
Rx descriptor + RXSTMPL/RXSTMPH registers mechanism. Rx timestamps are
reported in the packet buffer only, which is implemented by igc_ptp_rx_
pktstamp(). So this patch removes igc_ptp_rx_rgtstamp() and all code
related to it, copied from igb driver.

Signed-off-by: Andre Guedes <andre.guedes@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igc/igc.h         |  3 --
 drivers/net/ethernet/intel/igc/igc_defines.h |  2 -
 drivers/net/ethernet/intel/igc/igc_main.c    | 12 ++----
 drivers/net/ethernet/intel/igc/igc_ptp.c     | 44 +-------------------
 drivers/net/ethernet/intel/igc/igc_regs.h    |  2 -
 5 files changed, 5 insertions(+), 58 deletions(-)

diff --git a/drivers/net/ethernet/intel/igc/igc.h b/drivers/net/ethernet/intel/igc/igc.h
index 9c57afad6afe..3070dfdb7eb4 100644
--- a/drivers/net/ethernet/intel/igc/igc.h
+++ b/drivers/net/ethernet/intel/igc/igc.h
@@ -210,8 +210,6 @@ struct igc_adapter {
 	struct sk_buff *ptp_tx_skb;
 	struct hwtstamp_config tstamp_config;
 	unsigned long ptp_tx_start;
-	unsigned long last_rx_ptp_check;
-	unsigned long last_rx_timestamp;
 	unsigned int ptp_flags;
 	/* System time value lock */
 	spinlock_t tmreg_lock;
@@ -549,7 +547,6 @@ void igc_ptp_init(struct igc_adapter *adapter);
 void igc_ptp_reset(struct igc_adapter *adapter);
 void igc_ptp_suspend(struct igc_adapter *adapter);
 void igc_ptp_stop(struct igc_adapter *adapter);
-void igc_ptp_rx_rgtstamp(struct igc_q_vector *q_vector, struct sk_buff *skb);
 void igc_ptp_rx_pktstamp(struct igc_q_vector *q_vector, void *va,
 			 struct sk_buff *skb);
 int igc_ptp_set_ts_config(struct net_device *netdev, struct ifreq *ifr);
diff --git a/drivers/net/ethernet/intel/igc/igc_defines.h b/drivers/net/ethernet/intel/igc/igc_defines.h
index ed0e560daaae..f1f464967f87 100644
--- a/drivers/net/ethernet/intel/igc/igc_defines.h
+++ b/drivers/net/ethernet/intel/igc/igc_defines.h
@@ -323,7 +323,6 @@
 
 /* Advanced Receive Descriptor bit definitions */
 #define IGC_RXDADV_STAT_TSIP	0x08000 /* timestamp in packet */
-#define IGC_RXDADV_STAT_TS	0x10000 /* Pkt was time stamped */
 
 #define IGC_RXDEXT_STATERR_CE		0x01000000
 #define IGC_RXDEXT_STATERR_SE		0x02000000
@@ -384,7 +383,6 @@
 #define IGC_FTQF_MASK_PROTO_BP	0x10000000
 
 /* Time Sync Receive Control bit definitions */
-#define IGC_TSYNCRXCTL_VALID		0x00000001  /* Rx timestamp valid */
 #define IGC_TSYNCRXCTL_TYPE_MASK	0x0000000E  /* Rx type mask */
 #define IGC_TSYNCRXCTL_TYPE_L2_V2	0x00
 #define IGC_TSYNCRXCTL_TYPE_L4_V1	0x02
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 7e4d56c7b4c4..1b71f63d0e86 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -1479,9 +1479,9 @@ static inline void igc_rx_hash(struct igc_ring *ring,
  * @rx_desc: pointer to the EOP Rx descriptor
  * @skb: pointer to current skb being populated
  *
- * This function checks the ring, descriptor, and packet information in
- * order to populate the hash, checksum, VLAN, timestamp, protocol, and
- * other fields within the skb.
+ * This function checks the ring, descriptor, and packet information in order
+ * to populate the hash, checksum, VLAN, protocol, and other fields within the
+ * skb.
  */
 static void igc_process_skb_fields(struct igc_ring *rx_ring,
 				   union igc_adv_rx_desc *rx_desc,
@@ -1491,10 +1491,6 @@ static void igc_process_skb_fields(struct igc_ring *rx_ring,
 
 	igc_rx_checksum(rx_ring, rx_desc, skb);
 
-	if (igc_test_staterr(rx_desc, IGC_RXDADV_STAT_TS) &&
-	    !igc_test_staterr(rx_desc, IGC_RXDADV_STAT_TSIP))
-		igc_ptp_rx_rgtstamp(rx_ring->q_vector, skb);
-
 	skb_record_rx_queue(skb, rx_ring->queue_index);
 
 	skb->protocol = eth_type_trans(skb, rx_ring->netdev);
@@ -1975,7 +1971,7 @@ static int igc_clean_rx_irq(struct igc_q_vector *q_vector, const int budget)
 		/* probably a little skewed due to removing CRC */
 		total_bytes += skb->len;
 
-		/* populate checksum, timestamp, VLAN, and protocol */
+		/* populate checksum, VLAN, and protocol */
 		igc_process_skb_fields(rx_ring, rx_desc, skb);
 
 		napi_gro_receive(&q_vector->napi, skb);
diff --git a/drivers/net/ethernet/intel/igc/igc_ptp.c b/drivers/net/ethernet/intel/igc/igc_ptp.c
index 0d746f8588c8..82e6c6c962d5 100644
--- a/drivers/net/ethernet/intel/igc/igc_ptp.c
+++ b/drivers/net/ethernet/intel/igc/igc_ptp.c
@@ -205,46 +205,6 @@ void igc_ptp_rx_pktstamp(struct igc_q_vector *q_vector, void *va,
 		ktime_sub_ns(skb_hwtstamps(skb)->hwtstamp, adjust);
 }
 
-/**
- * igc_ptp_rx_rgtstamp - retrieve Rx timestamp stored in register
- * @q_vector: Pointer to interrupt specific structure
- * @skb: Buffer containing timestamp and packet
- *
- * This function is meant to retrieve a timestamp from the internal registers
- * of the adapter and store it in the skb.
- */
-void igc_ptp_rx_rgtstamp(struct igc_q_vector *q_vector,
-			 struct sk_buff *skb)
-{
-	struct igc_adapter *adapter = q_vector->adapter;
-	struct igc_hw *hw = &adapter->hw;
-	u64 regval;
-
-	/* If this bit is set, then the RX registers contain the time
-	 * stamp. No other packet will be time stamped until we read
-	 * these registers, so read the registers to make them
-	 * available again. Because only one packet can be time
-	 * stamped at a time, we know that the register values must
-	 * belong to this one here and therefore we don't need to
-	 * compare any of the additional attributes stored for it.
-	 *
-	 * If nothing went wrong, then it should have a shared
-	 * tx_flags that we can turn into a skb_shared_hwtstamps.
-	 */
-	if (!(rd32(IGC_TSYNCRXCTL) & IGC_TSYNCRXCTL_VALID))
-		return;
-
-	regval = rd32(IGC_RXSTMPL);
-	regval |= (u64)rd32(IGC_RXSTMPH) << 32;
-
-	igc_ptp_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), regval);
-
-	/* Update the last_rx_timestamp timer in order to enable watchdog check
-	 * for error case of latched timestamp on a dropped packet.
-	 */
-	adapter->last_rx_timestamp = jiffies;
-}
-
 /**
  * igc_ptp_enable_tstamp_rxqueue - Enable RX timestamp for a queue
  * @rx_ring: Pointer to RX queue
@@ -419,11 +379,9 @@ static int igc_ptp_set_timestamp_mode(struct igc_adapter *adapter,
 	}
 	wrfl();
 
-	/* clear TX/RX time stamp registers, just to be sure */
+	/* clear TX time stamp registers, just to be sure */
 	regval = rd32(IGC_TXSTMPL);
 	regval = rd32(IGC_TXSTMPH);
-	regval = rd32(IGC_RXSTMPL);
-	regval = rd32(IGC_RXSTMPH);
 
 	return 0;
 }
diff --git a/drivers/net/ethernet/intel/igc/igc_regs.h b/drivers/net/ethernet/intel/igc/igc_regs.h
index 97f9b928509f..d53f49833db5 100644
--- a/drivers/net/ethernet/intel/igc/igc_regs.h
+++ b/drivers/net/ethernet/intel/igc/igc_regs.h
@@ -228,8 +228,6 @@
 #define IGC_SYSTIMR	0x0B6F8  /* System time register Residue */
 #define IGC_TIMINCA	0x0B608  /* Increment attributes register - RW */
 
-#define IGC_RXSTMPL	0x0B624  /* Rx timestamp Low - RO */
-#define IGC_RXSTMPH	0x0B628  /* Rx timestamp High - RO */
 #define IGC_TXSTMPL	0x0B618  /* Tx timestamp value Low - RO */
 #define IGC_TXSTMPH	0x0B61C  /* Tx timestamp value High - RO */
 
-- 
2.26.2

[net-next v2 04/13] igc: Remove duplicate code in Tx timestamp handling

[Jeff Kirsher]

From: Andre Guedes <andre.guedes@intel.com>

The functions igc_ptp_tx_hang() and igc_ptp_tx_work() have duplicate
code which handles Tx timestamp timeouts. This patch does a trivial
refactoring by moving that code to its own function and reusing it.

Signed-off-by: Andre Guedes <andre.guedes@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igc/igc_ptp.c | 34 +++++++++++-------------
 1 file changed, 15 insertions(+), 19 deletions(-)

diff --git a/drivers/net/ethernet/intel/igc/igc_ptp.c b/drivers/net/ethernet/intel/igc/igc_ptp.c
index 82e6c6c962d5..b1b23c6bf689 100644
--- a/drivers/net/ethernet/intel/igc/igc_ptp.c
+++ b/drivers/net/ethernet/intel/igc/igc_ptp.c
@@ -386,11 +386,23 @@ static int igc_ptp_set_timestamp_mode(struct igc_adapter *adapter,
 	return 0;
 }
 
+static void igc_ptp_tx_timeout(struct igc_adapter *adapter)
+{
+	struct igc_hw *hw = &adapter->hw;
+
+	dev_kfree_skb_any(adapter->ptp_tx_skb);
+	adapter->ptp_tx_skb = NULL;
+	adapter->tx_hwtstamp_timeouts++;
+	clear_bit_unlock(__IGC_PTP_TX_IN_PROGRESS, &adapter->state);
+	/* Clear the tx valid bit in TSYNCTXCTL register to enable interrupt. */
+	rd32(IGC_TXSTMPH);
+	netdev_warn(adapter->netdev, "Tx timestamp timeout\n");
+}
+
 void igc_ptp_tx_hang(struct igc_adapter *adapter)
 {
 	bool timeout = time_is_before_jiffies(adapter->ptp_tx_start +
 					      IGC_PTP_TX_TIMEOUT);
-	struct igc_hw *hw = &adapter->hw;
 
 	if (!adapter->ptp_tx_skb)
 		return;
@@ -404,15 +416,7 @@ void igc_ptp_tx_hang(struct igc_adapter *adapter)
 	 */
 	if (timeout) {
 		cancel_work_sync(&adapter->ptp_tx_work);
-		dev_kfree_skb_any(adapter->ptp_tx_skb);
-		adapter->ptp_tx_skb = NULL;
-		clear_bit_unlock(__IGC_PTP_TX_IN_PROGRESS, &adapter->state);
-		adapter->tx_hwtstamp_timeouts++;
-		/* Clear the Tx valid bit in TSYNCTXCTL register to enable
-		 * interrupt
-		 */
-		rd32(IGC_TXSTMPH);
-		netdev_warn(adapter->netdev, "Clearing Tx timestamp hang\n");
+		igc_ptp_tx_timeout(adapter);
 	}
 }
 
@@ -467,15 +471,7 @@ static void igc_ptp_tx_work(struct work_struct *work)
 
 	if (time_is_before_jiffies(adapter->ptp_tx_start +
 				   IGC_PTP_TX_TIMEOUT)) {
-		dev_kfree_skb_any(adapter->ptp_tx_skb);
-		adapter->ptp_tx_skb = NULL;
-		clear_bit_unlock(__IGC_PTP_TX_IN_PROGRESS, &adapter->state);
-		adapter->tx_hwtstamp_timeouts++;
-		/* Clear the tx valid bit in TSYNCTXCTL register to enable
-		 * interrupt
-		 */
-		rd32(IGC_TXSTMPH);
-		netdev_warn(adapter->netdev, "Clearing Tx timestamp hang\n");
+		igc_ptp_tx_timeout(adapter);
 		return;
 	}
 
-- 
2.26.2

[net-next v2 05/13] igc: Check __IGC_PTP_TX_IN_PROGRESS instead of ptp_tx_skb

[Jeff Kirsher]

From: Andre Guedes <andre.guedes@intel.com>

The __IGC_PTP_TX_IN_PROGRESS flag indicates we have a pending Tx
timestamp. In some places, instead of checking that flag, we check
adapter->ptp_tx_skb. This patch fixes those places to use the flag.

Quick note about igc_ptp_tx_hwtstamp() change: when that function is
called, adapter->ptp_tx_skb is expected to be valid always so we
WARN_ON_ONCE() in case it is not.

Quick note about igc_ptp_suspend() change: when suspending, we don't
really need to check if there is a pending timestamp. We can simply
clear it unconditionally.

Signed-off-by: Andre Guedes <andre.guedes@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igc/igc_ptp.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/intel/igc/igc_ptp.c b/drivers/net/ethernet/intel/igc/igc_ptp.c
index b1b23c6bf689..e65fdcf966b2 100644
--- a/drivers/net/ethernet/intel/igc/igc_ptp.c
+++ b/drivers/net/ethernet/intel/igc/igc_ptp.c
@@ -404,9 +404,6 @@ void igc_ptp_tx_hang(struct igc_adapter *adapter)
 	bool timeout = time_is_before_jiffies(adapter->ptp_tx_start +
 					      IGC_PTP_TX_TIMEOUT);
 
-	if (!adapter->ptp_tx_skb)
-		return;
-
 	if (!test_bit(__IGC_PTP_TX_IN_PROGRESS, &adapter->state))
 		return;
 
@@ -435,6 +432,9 @@ static void igc_ptp_tx_hwtstamp(struct igc_adapter *adapter)
 	struct igc_hw *hw = &adapter->hw;
 	u64 regval;
 
+	if (WARN_ON_ONCE(!skb))
+		return;
+
 	regval = rd32(IGC_TXSTMPL);
 	regval |= (u64)rd32(IGC_TXSTMPH) << 32;
 	igc_ptp_systim_to_hwtstamp(adapter, &shhwtstamps, regval);
@@ -466,7 +466,7 @@ static void igc_ptp_tx_work(struct work_struct *work)
 	struct igc_hw *hw = &adapter->hw;
 	u32 tsynctxctl;
 
-	if (!adapter->ptp_tx_skb)
+	if (!test_bit(__IGC_PTP_TX_IN_PROGRESS, &adapter->state))
 		return;
 
 	if (time_is_before_jiffies(adapter->ptp_tx_start +
@@ -588,11 +588,9 @@ void igc_ptp_suspend(struct igc_adapter *adapter)
 		return;
 
 	cancel_work_sync(&adapter->ptp_tx_work);
-	if (adapter->ptp_tx_skb) {
-		dev_kfree_skb_any(adapter->ptp_tx_skb);
-		adapter->ptp_tx_skb = NULL;
-		clear_bit_unlock(__IGC_PTP_TX_IN_PROGRESS, &adapter->state);
-	}
+	dev_kfree_skb_any(adapter->ptp_tx_skb);
+	adapter->ptp_tx_skb = NULL;
+	clear_bit_unlock(__IGC_PTP_TX_IN_PROGRESS, &adapter->state);
 }
 
 /**
-- 
2.26.2

[net-next v2 06/13] igc: Remove UDP filter setup in PTP code

[Jeff Kirsher]

From: Andre Guedes <andre.guedes@intel.com>

As implemented in igc_ethtool_get_ts_info(), igc only supports HWTSTAMP_
FILTER_ALL so any HWTSTAMP_FILTER_* option the user may set falls back to
HWTSTAMP_FILTER_ALL.

HWTSTAMP_FILTER_ALL is implemented via Rx Time Sync Control (TSYNCRXCTL)
configuration which timestamps all incoming packets. Configuring a
UDP filter, in addition to TSYNCRXCTL, doesn't add much so this patch
removes that code. It also takes this opportunity to remove some
non-applicable comments.

Signed-off-by: Andre Guedes <andre.guedes@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igc/igc_ptp.c | 51 +-----------------------
 1 file changed, 1 insertion(+), 50 deletions(-)

diff --git a/drivers/net/ethernet/intel/igc/igc_ptp.c b/drivers/net/ethernet/intel/igc/igc_ptp.c
index e65fdcf966b2..bdf934377abb 100644
--- a/drivers/net/ethernet/intel/igc/igc_ptp.c
+++ b/drivers/net/ethernet/intel/igc/igc_ptp.c
@@ -244,18 +244,7 @@ static void igc_ptp_enable_tstamp_all_rxqueues(struct igc_adapter *adapter,
  * @adapter: networking device structure
  * @config: hwtstamp configuration
  *
- * Outgoing time stamping can be enabled and disabled. Play nice and
- * disable it when requested, although it shouldn't case any overhead
- * when no packet needs it. At most one packet in the queue may be
- * marked for time stamping, otherwise it would be impossible to tell
- * for sure to which packet the hardware time stamp belongs.
- *
- * Incoming time stamping has to be configured via the hardware
- * filters. Not all combinations are supported, in particular event
- * type has to be specified. Matching the kind of event packet is
- * not supported, with the exception of "all V2 events regardless of
- * level 2 or 4".
- *
+ * Return: 0 in case of success, negative errno code otherwise.
  */
 static int igc_ptp_set_timestamp_mode(struct igc_adapter *adapter,
 				      struct hwtstamp_config *config)
@@ -263,8 +252,6 @@ static int igc_ptp_set_timestamp_mode(struct igc_adapter *adapter,
 	u32 tsync_tx_ctl = IGC_TSYNCTXCTL_ENABLED;
 	u32 tsync_rx_ctl = IGC_TSYNCRXCTL_ENABLED;
 	struct igc_hw *hw = &adapter->hw;
-	u32 tsync_rx_cfg = 0;
-	bool is_l4 = false;
 	u32 regval;
 
 	/* reserved for future extensions */
@@ -285,15 +272,7 @@ static int igc_ptp_set_timestamp_mode(struct igc_adapter *adapter,
 		tsync_rx_ctl = 0;
 		break;
 	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
-		tsync_rx_ctl |= IGC_TSYNCRXCTL_TYPE_L4_V1;
-		tsync_rx_cfg = IGC_TSYNCRXCFG_PTP_V1_SYNC_MESSAGE;
-		is_l4 = true;
-		break;
 	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
-		tsync_rx_ctl |= IGC_TSYNCRXCTL_TYPE_L4_V1;
-		tsync_rx_cfg = IGC_TSYNCRXCFG_PTP_V1_DELAY_REQ_MESSAGE;
-		is_l4 = true;
-		break;
 	case HWTSTAMP_FILTER_PTP_V2_EVENT:
 	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
 	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
@@ -303,32 +282,22 @@ static int igc_ptp_set_timestamp_mode(struct igc_adapter *adapter,
 	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
 	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
 	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
-		tsync_rx_ctl |= IGC_TSYNCRXCTL_TYPE_EVENT_V2;
-		config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
-		is_l4 = true;
-		break;
 	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
 	case HWTSTAMP_FILTER_NTP_ALL:
 	case HWTSTAMP_FILTER_ALL:
 		tsync_rx_ctl |= IGC_TSYNCRXCTL_TYPE_ALL;
 		config->rx_filter = HWTSTAMP_FILTER_ALL;
 		break;
-		/* fall through */
 	default:
 		config->rx_filter = HWTSTAMP_FILTER_NONE;
 		return -ERANGE;
 	}
 
-	/* Per-packet timestamping only works if all packets are
-	 * timestamped, so enable timestamping in all packets as long
-	 * as one Rx filter was configured.
-	 */
 	if (tsync_rx_ctl) {
 		tsync_rx_ctl = IGC_TSYNCRXCTL_ENABLED;
 		tsync_rx_ctl |= IGC_TSYNCRXCTL_TYPE_ALL;
 		tsync_rx_ctl |= IGC_TSYNCRXCTL_RXSYNSIG;
 		config->rx_filter = HWTSTAMP_FILTER_ALL;
-		is_l4 = true;
 
 		if (hw->mac.type == igc_i225) {
 			regval = rd32(IGC_RXPBS);
@@ -359,24 +328,6 @@ static int igc_ptp_set_timestamp_mode(struct igc_adapter *adapter,
 	regval |= tsync_rx_ctl;
 	wr32(IGC_TSYNCRXCTL, regval);
 
-	/* define which PTP packets are time stamped */
-	wr32(IGC_TSYNCRXCFG, tsync_rx_cfg);
-
-	/* L4 Queue Filter[3]: filter by destination port and protocol */
-	if (is_l4) {
-		u32 ftqf = (IPPROTO_UDP /* UDP */
-			    | IGC_FTQF_VF_BP /* VF not compared */
-			    | IGC_FTQF_1588_TIME_STAMP /* Enable Timestamp */
-			    | IGC_FTQF_MASK); /* mask all inputs */
-		ftqf &= ~IGC_FTQF_MASK_PROTO_BP; /* enable protocol check */
-
-		wr32(IGC_IMIR(3), htons(PTP_EV_PORT));
-		wr32(IGC_IMIREXT(3),
-		     (IGC_IMIREXT_SIZE_BP | IGC_IMIREXT_CTRL_BP));
-		wr32(IGC_FTQF(3), ftqf);
-	} else {
-		wr32(IGC_FTQF(3), IGC_FTQF_MASK);
-	}
 	wrfl();
 
 	/* clear TX time stamp registers, just to be sure */
-- 
2.26.2

[net-next v2 07/13] igc: Refactor igc_ptp_set_timestamp_mode()

[Jeff Kirsher]

From: Andre Guedes <andre.guedes@intel.com>

Current igc_ptp_set_timestamp_mode() logic is a bit tangled since it
handles many different hardware configurations in one single place,
making it harder to follow. This patch untangles that code by breaking
it into helper functions.

Quick note about the hw->mac.type check which was removed in this
refactoring: this check it not really needed since igc_i225 is the only
type supported by the IGC driver.

Signed-off-by: Andre Guedes <andre.guedes@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igc/igc_ptp.c | 103 ++++++++++++-----------
 1 file changed, 53 insertions(+), 50 deletions(-)

diff --git a/drivers/net/ethernet/intel/igc/igc_ptp.c b/drivers/net/ethernet/intel/igc/igc_ptp.c
index bdf934377abb..0251e6bedac4 100644
--- a/drivers/net/ethernet/intel/igc/igc_ptp.c
+++ b/drivers/net/ethernet/intel/igc/igc_ptp.c
@@ -239,6 +239,54 @@ static void igc_ptp_enable_tstamp_all_rxqueues(struct igc_adapter *adapter,
 	}
 }
 
+static void igc_ptp_disable_rx_timestamp(struct igc_adapter *adapter)
+{
+	struct igc_hw *hw = &adapter->hw;
+	u32 val;
+
+	wr32(IGC_TSYNCRXCTL, 0);
+
+	val = rd32(IGC_RXPBS);
+	val &= ~IGC_RXPBS_CFG_TS_EN;
+	wr32(IGC_RXPBS, val);
+}
+
+static void igc_ptp_enable_rx_timestamp(struct igc_adapter *adapter)
+{
+	struct igc_hw *hw = &adapter->hw;
+	u32 val;
+
+	val = rd32(IGC_RXPBS);
+	val |= IGC_RXPBS_CFG_TS_EN;
+	wr32(IGC_RXPBS, val);
+
+	/* FIXME: For now, only support retrieving RX timestamps from timer 0
+	 */
+	igc_ptp_enable_tstamp_all_rxqueues(adapter, 0);
+
+	val = IGC_TSYNCRXCTL_ENABLED | IGC_TSYNCRXCTL_TYPE_ALL |
+	      IGC_TSYNCRXCTL_RXSYNSIG;
+	wr32(IGC_TSYNCRXCTL, val);
+}
+
+static void igc_ptp_disable_tx_timestamp(struct igc_adapter *adapter)
+{
+	struct igc_hw *hw = &adapter->hw;
+
+	wr32(IGC_TSYNCTXCTL, 0);
+}
+
+static void igc_ptp_enable_tx_timestamp(struct igc_adapter *adapter)
+{
+	struct igc_hw *hw = &adapter->hw;
+
+	wr32(IGC_TSYNCTXCTL, IGC_TSYNCTXCTL_ENABLED | IGC_TSYNCTXCTL_TXSYNSIG);
+
+	/* Read TXSTMP registers to discard any timestamp previously stored. */
+	rd32(IGC_TXSTMPL);
+	rd32(IGC_TXSTMPH);
+}
+
 /**
  * igc_ptp_set_timestamp_mode - setup hardware for timestamping
  * @adapter: networking device structure
@@ -249,19 +297,16 @@ static void igc_ptp_enable_tstamp_all_rxqueues(struct igc_adapter *adapter,
 static int igc_ptp_set_timestamp_mode(struct igc_adapter *adapter,
 				      struct hwtstamp_config *config)
 {
-	u32 tsync_tx_ctl = IGC_TSYNCTXCTL_ENABLED;
-	u32 tsync_rx_ctl = IGC_TSYNCRXCTL_ENABLED;
-	struct igc_hw *hw = &adapter->hw;
-	u32 regval;
-
 	/* reserved for future extensions */
 	if (config->flags)
 		return -EINVAL;
 
 	switch (config->tx_type) {
 	case HWTSTAMP_TX_OFF:
-		tsync_tx_ctl = 0;
+		igc_ptp_disable_tx_timestamp(adapter);
+		break;
 	case HWTSTAMP_TX_ON:
+		igc_ptp_enable_tx_timestamp(adapter);
 		break;
 	default:
 		return -ERANGE;
@@ -269,7 +314,7 @@ static int igc_ptp_set_timestamp_mode(struct igc_adapter *adapter,
 
 	switch (config->rx_filter) {
 	case HWTSTAMP_FILTER_NONE:
-		tsync_rx_ctl = 0;
+		igc_ptp_disable_rx_timestamp(adapter);
 		break;
 	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
 	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
@@ -285,55 +330,13 @@ static int igc_ptp_set_timestamp_mode(struct igc_adapter *adapter,
 	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
 	case HWTSTAMP_FILTER_NTP_ALL:
 	case HWTSTAMP_FILTER_ALL:
-		tsync_rx_ctl |= IGC_TSYNCRXCTL_TYPE_ALL;
+		igc_ptp_enable_rx_timestamp(adapter);
 		config->rx_filter = HWTSTAMP_FILTER_ALL;
 		break;
 	default:
-		config->rx_filter = HWTSTAMP_FILTER_NONE;
 		return -ERANGE;
 	}
 
-	if (tsync_rx_ctl) {
-		tsync_rx_ctl = IGC_TSYNCRXCTL_ENABLED;
-		tsync_rx_ctl |= IGC_TSYNCRXCTL_TYPE_ALL;
-		tsync_rx_ctl |= IGC_TSYNCRXCTL_RXSYNSIG;
-		config->rx_filter = HWTSTAMP_FILTER_ALL;
-
-		if (hw->mac.type == igc_i225) {
-			regval = rd32(IGC_RXPBS);
-			regval |= IGC_RXPBS_CFG_TS_EN;
-			wr32(IGC_RXPBS, regval);
-
-			/* FIXME: For now, only support retrieving RX
-			 * timestamps from timer 0
-			 */
-			igc_ptp_enable_tstamp_all_rxqueues(adapter, 0);
-		}
-	}
-
-	if (tsync_tx_ctl) {
-		tsync_tx_ctl = IGC_TSYNCTXCTL_ENABLED;
-		tsync_tx_ctl |= IGC_TSYNCTXCTL_TXSYNSIG;
-	}
-
-	/* enable/disable TX */
-	regval = rd32(IGC_TSYNCTXCTL);
-	regval &= ~IGC_TSYNCTXCTL_ENABLED;
-	regval |= tsync_tx_ctl;
-	wr32(IGC_TSYNCTXCTL, regval);
-
-	/* enable/disable RX */
-	regval = rd32(IGC_TSYNCRXCTL);
-	regval &= ~(IGC_TSYNCRXCTL_ENABLED | IGC_TSYNCRXCTL_TYPE_MASK);
-	regval |= tsync_rx_ctl;
-	wr32(IGC_TSYNCRXCTL, regval);
-
-	wrfl();
-
-	/* clear TX time stamp registers, just to be sure */
-	regval = rd32(IGC_TXSTMPL);
-	regval = rd32(IGC_TXSTMPH);
-
 	return 0;
 }
 
-- 
2.26.2

[net-next v2 08/13] igc: Fix Rx timestamp disabling

[Jeff Kirsher]

From: Andre Guedes <andre.guedes@intel.com>

When Rx timestamping is enabled, we set the timestamp bit in SRRCTL
register for each queue, but we don't clear it when disabling. This
patch fixes igc_ptp_disable_rx_timestamp() accordingly.

Also, this patch gets rid of igc_ptp_enable_tstamp_rxqueue() and
igc_ptp_enable_tstamp_all_rxqueues() and move their logic into
igc_ptp_enable_rx_timestamp() to keep the enable and disable
helpers symmetric.

Signed-off-by: Andre Guedes <andre.guedes@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igc/igc_ptp.c | 54 ++++++++----------------
 1 file changed, 17 insertions(+), 37 deletions(-)

diff --git a/drivers/net/ethernet/intel/igc/igc_ptp.c b/drivers/net/ethernet/intel/igc/igc_ptp.c
index 0251e6bedac4..e67d4655b47e 100644
--- a/drivers/net/ethernet/intel/igc/igc_ptp.c
+++ b/drivers/net/ethernet/intel/igc/igc_ptp.c
@@ -205,47 +205,20 @@ void igc_ptp_rx_pktstamp(struct igc_q_vector *q_vector, void *va,
 		ktime_sub_ns(skb_hwtstamps(skb)->hwtstamp, adjust);
 }
 
-/**
- * igc_ptp_enable_tstamp_rxqueue - Enable RX timestamp for a queue
- * @rx_ring: Pointer to RX queue
- * @timer: Index for timer
- *
- * This function enables RX timestamping for a queue, and selects
- * which 1588 timer will provide the timestamp.
- */
-static void igc_ptp_enable_tstamp_rxqueue(struct igc_adapter *adapter,
-					  struct igc_ring *rx_ring, u8 timer)
-{
-	struct igc_hw *hw = &adapter->hw;
-	int reg_idx = rx_ring->reg_idx;
-	u32 srrctl = rd32(IGC_SRRCTL(reg_idx));
-
-	srrctl |= IGC_SRRCTL_TIMESTAMP;
-	srrctl |= IGC_SRRCTL_TIMER1SEL(timer);
-	srrctl |= IGC_SRRCTL_TIMER0SEL(timer);
-
-	wr32(IGC_SRRCTL(reg_idx), srrctl);
-}
-
-static void igc_ptp_enable_tstamp_all_rxqueues(struct igc_adapter *adapter,
-					       u8 timer)
-{
-	int i;
-
-	for (i = 0; i < adapter->num_rx_queues; i++) {
-		struct igc_ring *ring = adapter->rx_ring[i];
-
-		igc_ptp_enable_tstamp_rxqueue(adapter, ring, timer);
-	}
-}
-
 static void igc_ptp_disable_rx_timestamp(struct igc_adapter *adapter)
 {
 	struct igc_hw *hw = &adapter->hw;
 	u32 val;
+	int i;
 
 	wr32(IGC_TSYNCRXCTL, 0);
 
+	for (i = 0; i < adapter->num_rx_queues; i++) {
+		val = rd32(IGC_SRRCTL(i));
+		val &= ~IGC_SRRCTL_TIMESTAMP;
+		wr32(IGC_SRRCTL(i), val);
+	}
+
 	val = rd32(IGC_RXPBS);
 	val &= ~IGC_RXPBS_CFG_TS_EN;
 	wr32(IGC_RXPBS, val);
@@ -255,14 +228,21 @@ static void igc_ptp_enable_rx_timestamp(struct igc_adapter *adapter)
 {
 	struct igc_hw *hw = &adapter->hw;
 	u32 val;
+	int i;
 
 	val = rd32(IGC_RXPBS);
 	val |= IGC_RXPBS_CFG_TS_EN;
 	wr32(IGC_RXPBS, val);
 
-	/* FIXME: For now, only support retrieving RX timestamps from timer 0
-	 */
-	igc_ptp_enable_tstamp_all_rxqueues(adapter, 0);
+	for (i = 0; i < adapter->num_rx_queues; i++) {
+		val = rd32(IGC_SRRCTL(i));
+		/* FIXME: For now, only support retrieving RX timestamps from
+		 * timer 0.
+		 */
+		val |= IGC_SRRCTL_TIMER1SEL(0) | IGC_SRRCTL_TIMER0SEL(0) |
+		       IGC_SRRCTL_TIMESTAMP;
+		wr32(IGC_SRRCTL(i), val);
+	}
 
 	val = IGC_TSYNCRXCTL_ENABLED | IGC_TSYNCRXCTL_TYPE_ALL |
 	      IGC_TSYNCRXCTL_RXSYNSIG;
-- 
2.26.2

[net-next v2 09/13] igc: Add LPI counters

[Jeff Kirsher]

From: Sasha Neftin <sasha.neftin@intel.com>

Add EEE TX LPI and EEE RX LPI counters. A EEE TX LPI event
occurs when the transmitter enters EEE (IEEE 802.3az) LPI
state. A EEE RX LPI event occurs when the receiver detect
link partner entry into EEE(IEEE 802.3az) LPI state.

Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igc/igc_mac.c  | 2 ++
 drivers/net/ethernet/intel/igc/igc_regs.h | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/intel/igc/igc_mac.c b/drivers/net/ethernet/intel/igc/igc_mac.c
index bc077f230f17..f3f7717b6233 100644
--- a/drivers/net/ethernet/intel/igc/igc_mac.c
+++ b/drivers/net/ethernet/intel/igc/igc_mac.c
@@ -307,6 +307,8 @@ void igc_clear_hw_cntrs_base(struct igc_hw *hw)
 	rd32(IGC_ICRXDMTC);
 
 	rd32(IGC_RPTHC);
+	rd32(IGC_TLPIC);
+	rd32(IGC_RLPIC);
 	rd32(IGC_HGPTC);
 	rd32(IGC_HGORCL);
 	rd32(IGC_HGORCH);
diff --git a/drivers/net/ethernet/intel/igc/igc_regs.h b/drivers/net/ethernet/intel/igc/igc_regs.h
index d53f49833db5..eb3e8e70501d 100644
--- a/drivers/net/ethernet/intel/igc/igc_regs.h
+++ b/drivers/net/ethernet/intel/igc/igc_regs.h
@@ -188,6 +188,8 @@
 #define IGC_ICTXQEC	0x04118  /* Interrupt Cause Tx Queue Empty Count */
 #define IGC_ICTXQMTC	0x0411C  /* Interrupt Cause Tx Queue Min Thresh Count */
 #define IGC_RPTHC	0x04104  /* Rx Packets To Host */
+#define IGC_TLPIC	0x04148  /* EEE Tx LPI Count */
+#define IGC_RLPIC	0x0414C  /* EEE Rx LPI Count */
 #define IGC_HGPTC	0x04118  /* Host Good Packets Tx Count */
 #define IGC_RXDMTC	0x04120  /* Rx Descriptor Minimum Threshold Count */
 #define IGC_HGORCL	0x04128  /* Host Good Octets Received Count Low */
-- 
2.26.2

[net-next v2 10/13] igc: Remove TCP segmentation TX fail counter

[Jeff Kirsher]

From: Sasha Neftin <sasha.neftin@intel.com>

TCP segmentation TX context fail counter is not
applicable for i225 devices.
This patch comes to clean up this counter.

Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Aaron Brown<aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igc/igc_mac.c  | 1 -
 drivers/net/ethernet/intel/igc/igc_main.c | 1 -
 drivers/net/ethernet/intel/igc/igc_regs.h | 1 -
 3 files changed, 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/igc/igc_mac.c b/drivers/net/ethernet/intel/igc/igc_mac.c
index f3f7717b6233..9a5e44ef45f4 100644
--- a/drivers/net/ethernet/intel/igc/igc_mac.c
+++ b/drivers/net/ethernet/intel/igc/igc_mac.c
@@ -289,7 +289,6 @@ void igc_clear_hw_cntrs_base(struct igc_hw *hw)
 	rd32(IGC_TNCRS);
 	rd32(IGC_HTDPMC);
 	rd32(IGC_TSCTC);
-	rd32(IGC_TSCTFC);
 
 	rd32(IGC_MGTPRC);
 	rd32(IGC_MGTPDC);
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 1b71f63d0e86..6a11f897aa62 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -3740,7 +3740,6 @@ void igc_update_stats(struct igc_adapter *adapter)
 	adapter->stats.algnerrc += rd32(IGC_ALGNERRC);
 
 	adapter->stats.tsctc += rd32(IGC_TSCTC);
-	adapter->stats.tsctfc += rd32(IGC_TSCTFC);
 
 	adapter->stats.iac += rd32(IGC_IAC);
 	adapter->stats.icrxoc += rd32(IGC_ICRXOC);
diff --git a/drivers/net/ethernet/intel/igc/igc_regs.h b/drivers/net/ethernet/intel/igc/igc_regs.h
index eb3e8e70501d..1c46cec5a799 100644
--- a/drivers/net/ethernet/intel/igc/igc_regs.h
+++ b/drivers/net/ethernet/intel/igc/igc_regs.h
@@ -181,7 +181,6 @@
 #define IGC_MPTC	0x040F0  /* Multicast Packets Tx Count - R/clr */
 #define IGC_BPTC	0x040F4  /* Broadcast Packets Tx Count - R/clr */
 #define IGC_TSCTC	0x040F8  /* TCP Segmentation Context Tx - R/clr */
-#define IGC_TSCTFC	0x040FC  /* TCP Segmentation Context Tx Fail - R/clr */
 #define IGC_IAC		0x04100  /* Interrupt Assertion Count */
 #define IGC_ICTXPTC	0x0410C  /* Interrupt Cause Tx Pkt Timer Expire Count */
 #define IGC_ICTXATC	0x04110  /* Interrupt Cause Tx Abs Timer Expire Count */
-- 
2.26.2

[net-next v2 11/13] igc: Refactor the igc_power_down_link()

[Jeff Kirsher]

From: Sasha Neftin <sasha.neftin@intel.com>

Currently the implementation of igc_power_down_link()
method was just calling igc_power_down_phy_copper_base()
method.
We can just call igc_power_down_phy_copper_base()
method directly.

Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igc/igc_main.c | 16 +++-------------
 1 file changed, 3 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 6a11f897aa62..555c6633f1c3 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -61,16 +61,6 @@ enum latency_range {
 	latency_invalid = 255
 };
 
-/**
- * igc_power_down_link - Power down the phy/serdes link
- * @adapter: address of board private structure
- */
-static void igc_power_down_link(struct igc_adapter *adapter)
-{
-	if (adapter->hw.phy.media_type == igc_media_type_copper)
-		igc_power_down_phy_copper_base(&adapter->hw);
-}
-
 void igc_reset(struct igc_adapter *adapter)
 {
 	struct net_device *dev = adapter->netdev;
@@ -106,7 +96,7 @@ void igc_reset(struct igc_adapter *adapter)
 	igc_set_eee_i225(hw, true, true, true);
 
 	if (!netif_running(adapter->netdev))
-		igc_power_down_link(adapter);
+		igc_power_down_phy_copper_base(&adapter->hw);
 
 	/* Re-enable PTP, where applicable. */
 	igc_ptp_reset(adapter);
@@ -4615,7 +4605,7 @@ static int __igc_open(struct net_device *netdev, bool resuming)
 	igc_free_irq(adapter);
 err_req_irq:
 	igc_release_hw_control(adapter);
-	igc_power_down_link(adapter);
+	igc_power_down_phy_copper_base(&adapter->hw);
 	igc_free_all_rx_resources(adapter);
 err_setup_rx:
 	igc_free_all_tx_resources(adapter);
@@ -5313,7 +5303,7 @@ static int __igc_shutdown(struct pci_dev *pdev, bool *enable_wake,
 
 	wake = wufc || adapter->en_mng_pt;
 	if (!wake)
-		igc_power_down_link(adapter);
+		igc_power_down_phy_copper_base(&adapter->hw);
 	else
 		igc_power_up_link(adapter);
 
-- 
2.26.2

[net-next v2 12/13] igc: Remove unneeded check for copper media type

[Jeff Kirsher]

From: Sasha Neftin <sasha.neftin@intel.com>

PHY of the i225 device support only copper mode.
There is no point to check media type in the
igc_power_up_link() method.

Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igc/igc_main.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 555c6633f1c3..e544f0599dcf 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -115,8 +115,7 @@ static void igc_power_up_link(struct igc_adapter *adapter)
 {
 	igc_reset_phy(&adapter->hw);
 
-	if (adapter->hw.phy.media_type == igc_media_type_copper)
-		igc_power_up_phy_copper(&adapter->hw);
+	igc_power_up_phy_copper(&adapter->hw);
 
 	igc_setup_link(&adapter->hw);
 }
-- 
2.26.2

[net-next v2 13/13] igc: Remove checking media type during MAC initialization

[Jeff Kirsher]

From: Sasha Neftin <sasha.neftin@intel.com>

i225 device support only copper mode.
There is no point to check media type in the
igc_config_fc_after_link_up() method.

Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/igc/igc_mac.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/intel/igc/igc_mac.c b/drivers/net/ethernet/intel/igc/igc_mac.c
index 9a5e44ef45f4..b47e7b0a6398 100644
--- a/drivers/net/ethernet/intel/igc/igc_mac.c
+++ b/drivers/net/ethernet/intel/igc/igc_mac.c
@@ -468,10 +468,8 @@ s32 igc_config_fc_after_link_up(struct igc_hw *hw)
 	 * so we had to force link.  In this case, we need to force the
 	 * configuration of the MAC to match the "fc" parameter.
 	 */
-	if (mac->autoneg_failed) {
-		if (hw->phy.media_type == igc_media_type_copper)
-			ret_val = igc_force_mac_fc(hw);
-	}
+	if (mac->autoneg_failed)
+		ret_val = igc_force_mac_fc(hw);
 
 	if (ret_val) {
 		hw_dbg("Error forcing flow control settings\n");
@@ -483,7 +481,7 @@ s32 igc_config_fc_after_link_up(struct igc_hw *hw)
 	 * has completed, and if so, how the PHY and link partner has
 	 * flow control configured.
 	 */
-	if (hw->phy.media_type == igc_media_type_copper && mac->autoneg) {
+	if (mac->autoneg) {
 		/* Read the MII Status Register and check to see if AutoNeg
 		 * has completed.  We read this twice because this reg has
 		 * some "sticky" (latched) bits.
-- 
2.26.2

Re: [net-next v2 00/13][pull request] 1GbE Intel Wired LAN Driver Updates 2020-06-29

[David Miller]

From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Mon, 29 Jun 2020 18:27:35 -0700

> This series contains updates to only the igc driver.
> 
> Sasha added Energy Efficient Ethernet (EEE) support and Latency Tolerance
> Reporting (LTR) support for the igc driver. Added Low Power Idle (LPI)
> counters and cleaned up unused TCP segmentation counters. Removed
> igc_power_down_link() and call igc_power_down_phy_copper_base()
> directly. Removed unneeded copper media check. 
> 
> Andre cleaned up timestamping by removing un-supported features and
> duplicate code for i225. Fixed the timestamp check on the proper flag
> instead of the skb for pending transmit timestamps. Refactored
> igc_ptp_set_timestamp_mode() to simply the flow.
> 
> v2: Removed the log message in patch 1 as suggested by David Miller.
>     Note: The locking issue Jakub Kicinski saw in patch 5, currently
>     exists in the current net-next tree, so Andre will resolve the
>     locking issue in a follow-on patch.
> 
> The following are changes since commit b8483ecaf72ee9059dcca5de969781028a550f89:
>   liquidio: use list_empty_careful in lio_list_delete_head
> and are available in the git repository at:
>   git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue 1GbE

Pulled, thanks Jeff.