ixgbe: add new wrapper for X550 support

For the X550 mac type we have to do additional steps around
enabling/disabling Rx.  This patch will add a layer of indirection
around these support functions to enable this.

CC: <kernel-team@fb.com>
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>

drivers/net/ethernet/intel/ixgbe/ixgbe_82598.c

@@ -1193,6 +1193,8 @@ static struct ixgbe_mac_operations mac_ops_82598 = {
 	.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_generic,
 };
 
 static struct ixgbe_eeprom_operations eeprom_ops_82598 = {

drivers/net/ethernet/intel/ixgbe/ixgbe_82599.c

@@ -1977,7 +1977,10 @@ static s32 ixgbe_enable_rx_dma_82599(struct ixgbe_hw *hw, u32 regval)
 	 */
 	hw->mac.ops.disable_rx_buff(hw);
 
-	IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, regval);
+	if (regval & IXGBE_RXCTRL_RXEN)
+		hw->mac.ops.enable_rx(hw);
+	else
+		hw->mac.ops.disable_rx(hw);
 
 	hw->mac.ops.enable_rx_buff(hw);
 
@@ -2336,6 +2339,8 @@ static struct ixgbe_mac_operations mac_ops_82599 = {
 	.init_thermal_sensor_thresh = &ixgbe_init_thermal_sensor_thresh_generic,
 	.prot_autoc_read	= &prot_autoc_read_82599,
 	.prot_autoc_write	= &prot_autoc_write_82599,
+	.enable_rx		= &ixgbe_enable_rx_generic,
+	.disable_rx		= &ixgbe_disable_rx_generic,
 };
 
 static struct ixgbe_eeprom_operations eeprom_ops_82599 = {

drivers/net/ethernet/intel/ixgbe/ixgbe_common.c

@@ -703,7 +703,7 @@ s32 ixgbe_stop_adapter_generic(struct ixgbe_hw *hw)
 	hw->adapter_stopped = true;
 
 	/* Disable the receive unit */
-	IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, 0);
+	hw->mac.ops.disable_rx(hw);
 
 	/* Clear interrupt mask to stop interrupts from being generated */
 	IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
@@ -2639,7 +2639,10 @@ s32 ixgbe_enable_rx_buff_generic(struct ixgbe_hw *hw)
  **/
 s32 ixgbe_enable_rx_dma_generic(struct ixgbe_hw *hw, u32 regval)
 {
-	IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, regval);
+	if (regval & IXGBE_RXCTRL_RXEN)
+		hw->mac.ops.enable_rx(hw);
+	else
+		hw->mac.ops.disable_rx(hw);
 
 	return 0;
 }
@@ -3850,3 +3853,44 @@ s32 ixgbe_init_thermal_sensor_thresh_generic(struct ixgbe_hw *hw)
 	return 0;
 }
 
+void ixgbe_disable_rx_generic(struct ixgbe_hw *hw)
+{
+	u32 rxctrl;
+
+	rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
+	if (rxctrl & IXGBE_RXCTRL_RXEN) {
+		if (hw->mac.type != ixgbe_mac_82598EB) {
+			u32 pfdtxgswc;
+
+			pfdtxgswc = IXGBE_READ_REG(hw, IXGBE_PFDTXGSWC);
+			if (pfdtxgswc & IXGBE_PFDTXGSWC_VT_LBEN) {
+				pfdtxgswc &= ~IXGBE_PFDTXGSWC_VT_LBEN;
+				IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, pfdtxgswc);
+				hw->mac.set_lben = true;
+			} else {
+				hw->mac.set_lben = false;
+			}
+		}
+		rxctrl &= ~IXGBE_RXCTRL_RXEN;
+		IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl);
+	}
+}
+
+void ixgbe_enable_rx_generic(struct ixgbe_hw *hw)
+{
+	u32 rxctrl;
+
+	rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
+	IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, (rxctrl | IXGBE_RXCTRL_RXEN));
+
+	if (hw->mac.type != ixgbe_mac_82598EB) {
+		if (hw->mac.set_lben) {
+			u32 pfdtxgswc;
+
+			pfdtxgswc = IXGBE_READ_REG(hw, IXGBE_PFDTXGSWC);
+			pfdtxgswc |= IXGBE_PFDTXGSWC_VT_LBEN;
+			IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, pfdtxgswc);
+			hw->mac.set_lben = false;
+		}
+	}
+}

drivers/net/ethernet/intel/ixgbe/ixgbe_common.h

@@ -130,6 +130,8 @@ void ixgbe_set_rxpba_generic(struct ixgbe_hw *hw, int num_pb,
 
 s32 ixgbe_get_thermal_sensor_data_generic(struct ixgbe_hw *hw);
 s32 ixgbe_init_thermal_sensor_thresh_generic(struct ixgbe_hw *hw);
+void ixgbe_disable_rx_generic(struct ixgbe_hw *hw);
+void ixgbe_enable_rx_generic(struct ixgbe_hw *hw);
 
 #define IXGBE_FAILED_READ_REG 0xffffffffU
 #define IXGBE_FAILED_READ_CFG_DWORD 0xffffffffU

drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c

@@ -1637,9 +1637,7 @@ static void ixgbe_free_desc_rings(struct ixgbe_adapter *adapter)
 	/* shut down the DMA engines now so they can be reinitialized later */
 
 	/* first Rx */
-	reg_ctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
-	reg_ctl &= ~IXGBE_RXCTRL_RXEN;
-	IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, reg_ctl);
+	hw->mac.ops.disable_rx(hw);
 	ixgbe_disable_rx_queue(adapter, rx_ring);
 
 	/* now Tx */
@@ -1670,6 +1668,7 @@ static int ixgbe_setup_desc_rings(struct ixgbe_adapter *adapter)
 {
 	struct ixgbe_ring *tx_ring = &adapter->test_tx_ring;
 	struct ixgbe_ring *rx_ring = &adapter->test_rx_ring;
+	struct ixgbe_hw *hw = &adapter->hw;
 	u32 rctl, reg_data;
 	int ret_val;
 	int err;
@@ -1713,14 +1712,16 @@ static int ixgbe_setup_desc_rings(struct ixgbe_adapter *adapter)
 		goto err_nomem;
 	}
 
-	rctl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXCTRL);
-	IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXCTRL, rctl & ~IXGBE_RXCTRL_RXEN);
+	hw->mac.ops.disable_rx(hw);
 
 	ixgbe_configure_rx_ring(adapter, rx_ring);
 
-	rctl |= IXGBE_RXCTRL_RXEN | IXGBE_RXCTRL_DMBYPS;
+	rctl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXCTRL);
+	rctl |= IXGBE_RXCTRL_DMBYPS;
 	IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXCTRL, rctl);
 
+	hw->mac.ops.enable_rx(hw);
+
 	return 0;
 
 err_nomem:

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

@@ -3705,8 +3705,7 @@ static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
 	u32 rxctrl, rfctl;
 
 	/* disable receives while setting up the descriptors */
-	rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
-	IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
+	hw->mac.ops.disable_rx(hw);
 
 	ixgbe_setup_psrtype(adapter);
 	ixgbe_setup_rdrxctl(adapter);
@@ -3731,6 +3730,7 @@ static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
 	for (i = 0; i < adapter->num_rx_queues; i++)
 		ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
 
+	rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
 	/* disable drop enable for 82598 parts */
 	if (hw->mac.type == ixgbe_mac_82598EB)
 		rxctrl |= IXGBE_RXCTRL_DMBYPS;
@@ -5014,16 +5014,14 @@ void ixgbe_down(struct ixgbe_adapter *adapter)
 	struct ixgbe_hw *hw = &adapter->hw;
 	struct net_device *upper;
 	struct list_head *iter;
-	u32 rxctrl;
 	int i;
 
 	/* signal that we are down to the interrupt handler */
 	if (test_and_set_bit(__IXGBE_DOWN, &adapter->state))
 		return; /* do nothing if already down */
 
 	/* disable receives */
-	rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
-	IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
+	hw->mac.ops.disable_rx(hw);
 
 	/* disable all enabled rx queues */
 	for (i = 0; i < adapter->num_rx_queues; i++)

drivers/net/ethernet/intel/ixgbe/ixgbe_type.h

@@ -3067,6 +3067,8 @@ 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);
+	void (*disable_rx)(struct ixgbe_hw *hw);
+	void (*enable_rx)(struct ixgbe_hw *hw);
 	void (*set_ethertype_anti_spoofing)(struct ixgbe_hw *, bool, int);
 
 	/* DMA Coalescing */
@@ -3137,6 +3139,7 @@ struct ixgbe_mac_info {
 	u8                              flags;
 	u8				san_mac_rar_index;
 	struct ixgbe_thermal_sensor_data  thermal_sensor_data;
+	bool				set_lben;
 };
 
 struct ixgbe_phy_info {

drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c

@@ -820,6 +820,8 @@ static struct ixgbe_mac_operations mac_ops_X540 = {
 	.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_generic,
 };
 
 static struct ixgbe_eeprom_operations eeprom_ops_X540 = {

drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c

@@ -557,6 +557,47 @@ static s32 ixgbe_update_flash_X550(struct ixgbe_hw *hw)
 	return status;
 }
 
+/** ixgbe_disable_rx_x550 - Disable RX unit
+ *
+ *  Enables the Rx DMA unit for x550
+ **/
+static void ixgbe_disable_rx_x550(struct ixgbe_hw *hw)
+{
+	u32 rxctrl, pfdtxgswc;
+	s32 status;
+	struct ixgbe_hic_disable_rxen fw_cmd;
+
+	rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
+	if (rxctrl & IXGBE_RXCTRL_RXEN) {
+		pfdtxgswc = IXGBE_READ_REG(hw, IXGBE_PFDTXGSWC);
+		if (pfdtxgswc & IXGBE_PFDTXGSWC_VT_LBEN) {
+			pfdtxgswc &= ~IXGBE_PFDTXGSWC_VT_LBEN;
+			IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, pfdtxgswc);
+			hw->mac.set_lben = true;
+		} else {
+			hw->mac.set_lben = false;
+		}
+
+		fw_cmd.hdr.cmd = FW_DISABLE_RXEN_CMD;
+		fw_cmd.hdr.buf_len = FW_DISABLE_RXEN_LEN;
+		fw_cmd.hdr.checksum = FW_DEFAULT_CHECKSUM;
+		fw_cmd.port_number = (u8)hw->bus.lan_id;
+
+		status = ixgbe_host_interface_command(hw, (u32 *)&fw_cmd,
+					sizeof(struct ixgbe_hic_disable_rxen),
+					IXGBE_HI_COMMAND_TIMEOUT, true);
+
+		/* If we fail - disable RX using register write */
+		if (status) {
+			rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
+			if (rxctrl & IXGBE_RXCTRL_RXEN) {
+				rxctrl &= ~IXGBE_RXCTRL_RXEN;
+				IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl);
+			}
+		}
+	}
+}
+
 /** ixgbe_update_eeprom_checksum_X550 - Updates the EEPROM checksum and flash
  *  @hw: pointer to hardware structure
  *
@@ -1366,6 +1407,8 @@ void ixgbe_set_ethertype_anti_spoofing_X550(struct ixgbe_hw *hw, bool enable,
 	.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, \
 
 static struct ixgbe_mac_operations mac_ops_X550 = {
 	X550_COMMON_MAC