ixgbe: fwlog support for e610

The device support firmware logging feature. Use libie code to
initialize it and allow reading the logs using debugfs.

The commands are the same as in ice driver. Look at the description in
commit 96a9a9341c ("ice: configure FW logging") for more info.

Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Tested-by: Rinitha S <sx.rinitha@intel.com> (A Contingent worker at Intel)
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/Kconfig

@@ -146,6 +146,7 @@ config IXGBE
 	tristate "Intel(R) 10GbE PCI Express adapters support"
 	depends on PCI
 	depends on PTP_1588_CLOCK_OPTIONAL
+	select LIBIE_FWLOG
 	select MDIO
 	select NET_DEVLINK
 	select PLDMFW

drivers/net/ethernet/intel/ixgbe/ixgbe_e610.c

@@ -3921,6 +3921,38 @@ static int ixgbe_read_pba_string_e610(struct ixgbe_hw *hw, u8 *pba_num,
 	return err;
 }
 
+static int __fwlog_send_cmd(void *priv, struct libie_aq_desc *desc, void *buf,
+			    u16 size)
+{
+	struct ixgbe_hw *hw = priv;
+
+	return ixgbe_aci_send_cmd(hw, desc, buf, size);
+}
+
+int ixgbe_fwlog_init(struct ixgbe_hw *hw)
+{
+	struct ixgbe_adapter *adapter = hw->back;
+	struct libie_fwlog_api api = {
+		.pdev = adapter->pdev,
+		.send_cmd = __fwlog_send_cmd,
+		.debugfs_root = adapter->ixgbe_dbg_adapter,
+		.priv = hw,
+	};
+
+	if (hw->mac.type != ixgbe_mac_e610)
+		return -EOPNOTSUPP;
+
+	return libie_fwlog_init(&hw->fwlog, &api);
+}
+
+void ixgbe_fwlog_deinit(struct ixgbe_hw *hw)
+{
+	if (hw->mac.type != ixgbe_mac_e610)
+		return;
+
+	libie_fwlog_deinit(&hw->fwlog);
+}
+
 static const struct ixgbe_mac_operations mac_ops_e610 = {
 	.init_hw			= ixgbe_init_hw_generic,
 	.start_hw			= ixgbe_start_hw_e610,

drivers/net/ethernet/intel/ixgbe/ixgbe_e610.h

@@ -96,5 +96,7 @@ int ixgbe_aci_update_nvm(struct ixgbe_hw *hw, u16 module_typeid,
 			 bool last_command, u8 command_flags);
 int ixgbe_nvm_write_activate(struct ixgbe_hw *hw, u16 cmd_flags,
 			     u8 *response_flags);
+int ixgbe_fwlog_init(struct ixgbe_hw *hw);
+void ixgbe_fwlog_deinit(struct ixgbe_hw *hw);
 
 #endif /* _IXGBE_E610_H_ */

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

@@ -172,6 +172,7 @@ static int debug = -1;
 module_param(debug, int, 0);
 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
 
+MODULE_IMPORT_NS("LIBIE_FWLOG");
 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
 MODULE_LICENSE("GPL v2");
 
@@ -3355,6 +3356,10 @@ static void ixgbe_handle_fw_event(struct ixgbe_adapter *adapter)
 			e_crit(drv, "%s\n", ixgbe_overheat_msg);
 			ixgbe_down(adapter);
 			break;
+		case libie_aqc_opc_fw_logs_event:
+			libie_get_fwlog_data(&hw->fwlog, event.msg_buf,
+					     le16_to_cpu(event.desc.datalen));
+			break;
 		default:
 			e_warn(hw, "unknown FW async event captured\n");
 			break;
@@ -11998,6 +12003,10 @@ static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	ixgbe_devlink_init_regions(adapter);
 	devl_register(adapter->devlink);
 	devl_unlock(adapter->devlink);
+
+	if (ixgbe_fwlog_init(hw))
+		e_dev_info("Firmware logging not supported\n");
+
 	return 0;
 
 err_netdev:
@@ -12055,6 +12064,7 @@ static void ixgbe_remove(struct pci_dev *pdev)
 	devl_lock(adapter->devlink);
 	devl_unregister(adapter->devlink);
 	ixgbe_devlink_destroy_regions(adapter);
+	ixgbe_fwlog_deinit(&adapter->hw);
 	ixgbe_dbg_adapter_exit(adapter);
 
 	set_bit(__IXGBE_REMOVING, &adapter->state);

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

@@ -7,6 +7,7 @@
 #include <linux/types.h>
 #include <linux/mdio.h>
 #include <linux/netdevice.h>
+#include <linux/net/intel/libie/fwlog.h>
 #include "ixgbe_type_e610.h"
 
 /* Device IDs */
@@ -3752,6 +3753,7 @@ struct ixgbe_hw {
 	struct ixgbe_flash_info		flash;
 	struct ixgbe_hw_dev_caps	dev_caps;
 	struct ixgbe_hw_func_caps	func_caps;
+	struct libie_fwlog		fwlog;
 };
 
 struct ixgbe_info {