ixgbe: fix MNG FW support when adapter not up

We were only turning the laser on when the adapter was up.  This
causes issues for those who wanted to access the MNG FW while the
port was in a down state.  This patch makes sure the laser is turned
on in probe and remain up even after the port is brought down.

Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

5 files changed, 65 insertions, 5 deletions

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_82598.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_82598.c
index d0113fc97b6f..4a5bfb6b3af0 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_82598.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_82598.c
@@ -1305,6 +1305,7 @@ static struct ixgbe_mac_operations mac_ops_82598 = {
 	.release_swfw_sync      = &ixgbe_release_swfw_sync,
 	.get_thermal_sensor_data = NULL,
 	.init_thermal_sensor_thresh = NULL,
+	.mng_fw_enabled		= NULL,
 };
 
 static struct ixgbe_eeprom_operations eeprom_ops_82598 = {
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
index 203a00c24330..b6289f11b764 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c
@@ -59,12 +59,34 @@ static s32 ixgbe_setup_copper_link_82599(struct ixgbe_hw *hw,
                                          bool autoneg_wait_to_complete);
 static s32 ixgbe_verify_fw_version_82599(struct ixgbe_hw *hw);
 
+static bool ixgbe_mng_enabled(struct ixgbe_hw *hw)
+{
+	u32 fwsm, manc, factps;
+
+	fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM);
+	if ((fwsm & IXGBE_FWSM_MODE_MASK) != IXGBE_FWSM_FW_MODE_PT)
+		return false;
+
+	manc = IXGBE_READ_REG(hw, IXGBE_MANC);
+	if (!(manc & IXGBE_MANC_RCV_TCO_EN))
+		return false;
+
+	factps = IXGBE_READ_REG(hw, IXGBE_FACTPS);
+	if (factps & IXGBE_FACTPS_MNGCG)
+		return false;
+
+	return true;
+}
+
 static void ixgbe_init_mac_link_ops_82599(struct ixgbe_hw *hw)
 {
 	struct ixgbe_mac_info *mac = &hw->mac;
 
-	/* enable the laser control functions for SFP+ fiber */
-	if (mac->ops.get_media_type(hw) == ixgbe_media_type_fiber) {
+	/* enable the laser control functions for SFP+ fiber
+	 * and MNG not enabled
+	 */
+	if ((mac->ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
+	    !hw->mng_fw_enabled) {
 		mac->ops.disable_tx_laser =
 		                       &ixgbe_disable_tx_laser_multispeed_fiber;
 		mac->ops.enable_tx_laser =
@@ -563,7 +585,8 @@ static s32 ixgbe_setup_mac_link_multispeed_fiber(struct ixgbe_hw *hw,
 			return status;
 
 		/* Flap the tx laser if it has not already been done */
-		hw->mac.ops.flap_tx_laser(hw);
+		if (hw->mac.ops.flap_tx_laser)
+			hw->mac.ops.flap_tx_laser(hw);
 
 		/*
 		 * Wait for the controller to acquire link.  Per IEEE 802.3ap,
@@ -615,7 +638,8 @@ static s32 ixgbe_setup_mac_link_multispeed_fiber(struct ixgbe_hw *hw,
 			return status;
 
 		/* Flap the tx laser if it has not already been done */
-		hw->mac.ops.flap_tx_laser(hw);
+		if (hw->mac.ops.flap_tx_laser)
+			hw->mac.ops.flap_tx_laser(hw);
 
 		/* Wait for the link partner to also set speed */
 		msleep(100);
@@ -933,6 +957,7 @@ static s32 ixgbe_reset_hw_82599(struct ixgbe_hw *hw)
 	ixgbe_link_speed link_speed;
 	s32 status;
 	u32 ctrl, i, autoc, autoc2;
+	u32 curr_lms;
 	bool link_up = false;
 
 	/* Call adapter stop to disable tx/rx and clear interrupts */
@@ -964,6 +989,9 @@ static s32 ixgbe_reset_hw_82599(struct ixgbe_hw *hw)
 	if (hw->phy.reset_disable == false && hw->phy.ops.reset != NULL)
 		hw->phy.ops.reset(hw);
 
+	/* remember AUTOC LMS from before we reset */
+	curr_lms = IXGBE_READ_REG(hw, IXGBE_AUTOC) & IXGBE_AUTOC_LMS_MASK;
+
 mac_reset_top:
 	/*
 	 * Issue global reset to the MAC. Needs to be SW reset if link is up.
@@ -1019,6 +1047,16 @@ mac_reset_top:
 		hw->mac.orig_autoc2 = autoc2;
 		hw->mac.orig_link_settings_stored = true;
 	} else {
+
+		/* If MNG FW is running on a multi-speed device that
+		 * doesn't autoneg with out driver support we need to
+		 * leave LMS in the state it was before we MAC reset.
+		 */
+		if (hw->phy.multispeed_fiber && hw->mng_fw_enabled)
+			hw->mac.orig_autoc =
+				(hw->mac.orig_autoc & ~IXGBE_AUTOC_LMS_MASK) |
+				curr_lms;
+
 		if (autoc != hw->mac.orig_autoc) {
 			/* Need SW/FW semaphore around AUTOC writes if LESM is
 			 * on, likewise reset_pipeline requires us to hold
@@ -2216,7 +2254,7 @@ static struct ixgbe_mac_operations mac_ops_82599 = {
 	.release_swfw_sync      = &ixgbe_release_swfw_sync,
 	.get_thermal_sensor_data = &ixgbe_get_thermal_sensor_data_generic,
 	.init_thermal_sensor_thresh = &ixgbe_init_thermal_sensor_thresh_generic,
-
+	.mng_fw_enabled		= &ixgbe_mng_enabled,
 };
 
 static struct ixgbe_eeprom_operations eeprom_ops_82599 = {
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 3beac2300643..ac6e464382e4 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -7370,6 +7370,10 @@ static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (err)
 		goto err_sw_init;
 
+	/* Cache if MNG FW is up so we don't have to read the REG later */
+	if (hw->mac.ops.mng_fw_enabled)
+		hw->mng_fw_enabled = hw->mac.ops.mng_fw_enabled(hw);
+
 	/* Make it possible the adapter to be woken up via WOL */
 	switch (adapter->hw.mac.type) {
 	case ixgbe_mac_82599EB:
@@ -7623,6 +7627,12 @@ skip_sriov:
 	ixgbe_dbg_adapter_init(adapter);
 #endif /* CONFIG_DEBUG_FS */
 
+	/* Need link setup for MNG FW, else wait for IXGBE_UP */
+	if (hw->mng_fw_enabled && hw->mac.ops.setup_link)
+		hw->mac.ops.setup_link(hw,
+			IXGBE_LINK_SPEED_10GB_FULL | IXGBE_LINK_SPEED_1GB_FULL,
+			true);
+
 	return 0;
 
 err_register:
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
index 05df36ef9884..200b1a885ec5 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
@@ -729,6 +729,13 @@ struct ixgbe_thermal_sensor_data {
 #define IXGBE_MDEF_EXT(_i) (0x05160 + ((_i) * 4)) /* 8 of these (0-7) */
 #define IXGBE_LSWFW     0x15014
 
+/* Management Bit Fields and Masks */
+#define IXGBE_MANC_RCV_TCO_EN	0x00020000 /* Rcv TCO packet enable */
+
+/* Firmware Semaphore Register */
+#define IXGBE_FWSM_MODE_MASK	0xE
+#define IXGBE_FWSM_FW_MODE_PT	0x4
+
 /* ARC Subsystem registers */
 #define IXGBE_HICR      0x15F00
 #define IXGBE_FWSTS     0x15F0C
@@ -1019,6 +1026,7 @@ struct ixgbe_thermal_sensor_data {
 #define IXGBE_CTRL_RST_MASK     (IXGBE_CTRL_LNK_RST | IXGBE_CTRL_RST)
 
 /* FACTPS */
+#define IXGBE_FACTPS_MNGCG      0x20000000 /* Manageblility Clock Gated */
 #define IXGBE_FACTPS_LFS        0x40000000 /* LAN Function Select */
 
 /* MHADD Bit Masks */
@@ -2861,6 +2869,7 @@ struct ixgbe_mac_operations {
 	s32 (*set_fw_drv_ver)(struct ixgbe_hw *, u8, u8, u8, u8);
 	s32 (*get_thermal_sensor_data)(struct ixgbe_hw *);
 	s32 (*init_thermal_sensor_thresh)(struct ixgbe_hw *hw);
+	bool (*mng_fw_enabled)(struct ixgbe_hw *hw);
 };
 
 struct ixgbe_phy_operations {
@@ -2988,6 +2997,7 @@ struct ixgbe_hw {
 	bool				adapter_stopped;
 	bool				force_full_reset;
 	bool				allow_unsupported_sfp;
+	bool				mng_fw_enabled;
 };
 
 struct ixgbe_info {
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c
index 66c5e946284e..389324f5929a 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c
@@ -854,6 +854,7 @@ static struct ixgbe_mac_operations mac_ops_X540 = {
 	.enable_rx_buff		= &ixgbe_enable_rx_buff_generic,
 	.get_thermal_sensor_data = NULL,
 	.init_thermal_sensor_thresh = NULL,
+	.mng_fw_enabled		= NULL,
 };
 
 static struct ixgbe_eeprom_operations eeprom_ops_X540 = {