drivers/net/ethernet/intel/e1000e/hw.h

/* Intel PRO/1000 Linux driver
 * Copyright(c) 1999 - 2015 Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * The full GNU General Public License is included in this distribution in
 * the file called "COPYING".
 *
 * Contact Information:
 * Linux NICS <linux.nics@intel.com>
 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 */

#ifndef _E1000_HW_H_
#define _E1000_HW_H_

#include "regs.h"
#include "defines.h"

struct e1000_hw;

#define E1000_DEV_ID_82571EB_COPPER		0x105E
#define E1000_DEV_ID_82571EB_FIBER		0x105F
#define E1000_DEV_ID_82571EB_SERDES		0x1060
#define E1000_DEV_ID_82571EB_QUAD_COPPER	0x10A4
#define E1000_DEV_ID_82571PT_QUAD_COPPER	0x10D5
#define E1000_DEV_ID_82571EB_QUAD_FIBER		0x10A5
#define E1000_DEV_ID_82571EB_QUAD_COPPER_LP	0x10BC
#define E1000_DEV_ID_82571EB_SERDES_DUAL	0x10D9
#define E1000_DEV_ID_82571EB_SERDES_QUAD	0x10DA
#define E1000_DEV_ID_82572EI_COPPER		0x107D
#define E1000_DEV_ID_82572EI_FIBER		0x107E
#define E1000_DEV_ID_82572EI_SERDES		0x107F
#define E1000_DEV_ID_82572EI			0x10B9
#define E1000_DEV_ID_82573E			0x108B
#define E1000_DEV_ID_82573E_IAMT		0x108C
#define E1000_DEV_ID_82573L			0x109A
#define E1000_DEV_ID_82574L			0x10D3
#define E1000_DEV_ID_82574LA			0x10F6
#define E1000_DEV_ID_82583V			0x150C
#define E1000_DEV_ID_80003ES2LAN_COPPER_DPT	0x1096
#define E1000_DEV_ID_80003ES2LAN_SERDES_DPT	0x1098
#define E1000_DEV_ID_80003ES2LAN_COPPER_SPT	0x10BA
#define E1000_DEV_ID_80003ES2LAN_SERDES_SPT	0x10BB
#define E1000_DEV_ID_ICH8_82567V_3		0x1501
#define E1000_DEV_ID_ICH8_IGP_M_AMT		0x1049
#define E1000_DEV_ID_ICH8_IGP_AMT		0x104A
#define E1000_DEV_ID_ICH8_IGP_C			0x104B
#define E1000_DEV_ID_ICH8_IFE			0x104C
#define E1000_DEV_ID_ICH8_IFE_GT		0x10C4
#define E1000_DEV_ID_ICH8_IFE_G			0x10C5
#define E1000_DEV_ID_ICH8_IGP_M			0x104D
#define E1000_DEV_ID_ICH9_IGP_AMT		0x10BD
#define E1000_DEV_ID_ICH9_BM			0x10E5
#define E1000_DEV_ID_ICH9_IGP_M_AMT		0x10F5
#define E1000_DEV_ID_ICH9_IGP_M			0x10BF
#define E1000_DEV_ID_ICH9_IGP_M_V		0x10CB
#define E1000_DEV_ID_ICH9_IGP_C			0x294C
#define E1000_DEV_ID_ICH9_IFE			0x10C0
#define E1000_DEV_ID_ICH9_IFE_GT		0x10C3
#define E1000_DEV_ID_ICH9_IFE_G			0x10C2
#define E1000_DEV_ID_ICH10_R_BM_LM		0x10CC
#define E1000_DEV_ID_ICH10_R_BM_LF		0x10CD
#define E1000_DEV_ID_ICH10_R_BM_V		0x10CE
#define E1000_DEV_ID_ICH10_D_BM_LM		0x10DE
#define E1000_DEV_ID_ICH10_D_BM_LF		0x10DF
#define E1000_DEV_ID_ICH10_D_BM_V		0x1525
#define E1000_DEV_ID_PCH_M_HV_LM		0x10EA
#define E1000_DEV_ID_PCH_M_HV_LC		0x10EB
#define E1000_DEV_ID_PCH_D_HV_DM		0x10EF
#define E1000_DEV_ID_PCH_D_HV_DC		0x10F0
#define E1000_DEV_ID_PCH2_LV_LM			0x1502
#define E1000_DEV_ID_PCH2_LV_V			0x1503
#define E1000_DEV_ID_PCH_LPT_I217_LM		0x153A
#define E1000_DEV_ID_PCH_LPT_I217_V		0x153B
#define E1000_DEV_ID_PCH_LPTLP_I218_LM		0x155A
#define E1000_DEV_ID_PCH_LPTLP_I218_V		0x1559
#define E1000_DEV_ID_PCH_I218_LM2		0x15A0
#define E1000_DEV_ID_PCH_I218_V2		0x15A1
#define E1000_DEV_ID_PCH_I218_LM3		0x15A2	/* Wildcat Point PCH */
#define E1000_DEV_ID_PCH_I218_V3		0x15A3	/* Wildcat Point PCH */
#define E1000_DEV_ID_PCH_SPT_I219_LM		0x156F	/* SPT PCH */
#define E1000_DEV_ID_PCH_SPT_I219_V		0x1570	/* SPT PCH */
#define E1000_DEV_ID_PCH_SPT_I219_LM2		0x15B7	/* SPT-H PCH */
#define E1000_DEV_ID_PCH_SPT_I219_V2		0x15B8	/* SPT-H PCH */
#define E1000_DEV_ID_PCH_LBG_I219_LM3		0x15B9	/* LBG PCH */
#define E1000_DEV_ID_PCH_SPT_I219_LM4		0x15D7
#define E1000_DEV_ID_PCH_SPT_I219_V4		0x15D8
#define E1000_DEV_ID_PCH_SPT_I219_LM5		0x15E3
#define E1000_DEV_ID_PCH_SPT_I219_V5		0x15D6
#define E1000_DEV_ID_PCH_CNP_I219_LM6		0x15BD
#define E1000_DEV_ID_PCH_CNP_I219_V6		0x15BE
#define E1000_DEV_ID_PCH_CNP_I219_LM7		0x15BB
#define E1000_DEV_ID_PCH_CNP_I219_V7		0x15BC

#define E1000_REVISION_4	4

#define E1000_FUNC_1		1

#define E1000_ALT_MAC_ADDRESS_OFFSET_LAN0	0
#define E1000_ALT_MAC_ADDRESS_OFFSET_LAN1	3

enum e1000_mac_type {
	e1000_82571,
	e1000_82572,
	e1000_82573,
	e1000_82574,
	e1000_82583,
	e1000_80003es2lan,
	e1000_ich8lan,
	e1000_ich9lan,
	e1000_ich10lan,
	e1000_pchlan,
	e1000_pch2lan,
	e1000_pch_lpt,
	e1000_pch_spt,
	e1000_pch_cnp,
};

enum e1000_media_type {
	e1000_media_type_unknown = 0,
	e1000_media_type_copper = 1,
	e1000_media_type_fiber = 2,
	e1000_media_type_internal_serdes = 3,
	e1000_num_media_types
};

enum e1000_nvm_type {
	e1000_nvm_unknown = 0,
	e1000_nvm_none,
	e1000_nvm_eeprom_spi,
	e1000_nvm_flash_hw,
	e1000_nvm_flash_sw
};

enum e1000_nvm_override {
	e1000_nvm_override_none = 0,
	e1000_nvm_override_spi_small,
	e1000_nvm_override_spi_large
};

enum e1000_phy_type {
	e1000_phy_unknown = 0,
	e1000_phy_none,
	e1000_phy_m88,
	e1000_phy_igp,
	e1000_phy_igp_2,
	e1000_phy_gg82563,
	e1000_phy_igp_3,
	e1000_phy_ife,
	e1000_phy_bm,
	e1000_phy_82578,
	e1000_phy_82577,
	e1000_phy_82579,
	e1000_phy_i217,
};

enum e1000_bus_width {
	e1000_bus_width_unknown = 0,
	e1000_bus_width_pcie_x1,
	e1000_bus_width_pcie_x2,
	e1000_bus_width_pcie_x4 = 4,
	e1000_bus_width_pcie_x8 = 8,
	e1000_bus_width_32,
	e1000_bus_width_64,
	e1000_bus_width_reserved
};

enum e1000_1000t_rx_status {
	e1000_1000t_rx_status_not_ok = 0,
	e1000_1000t_rx_status_ok,
	e1000_1000t_rx_status_undefined = 0xFF
};

enum e1000_rev_polarity {
	e1000_rev_polarity_normal = 0,
	e1000_rev_polarity_reversed,
	e1000_rev_polarity_undefined = 0xFF
};

enum e1000_fc_mode {
	e1000_fc_none = 0,
	e1000_fc_rx_pause,
	e1000_fc_tx_pause,
	e1000_fc_full,
	e1000_fc_default = 0xFF
};

enum e1000_ms_type {
	e1000_ms_hw_default = 0,
	e1000_ms_force_master,
	e1000_ms_force_slave,
	e1000_ms_auto
};

enum e1000_smart_speed {
	e1000_smart_speed_default = 0,
	e1000_smart_speed_on,
	e1000_smart_speed_off
};

enum e1000_serdes_link_state {
	e1000_serdes_link_down = 0,
	e1000_serdes_link_autoneg_progress,
	e1000_serdes_link_autoneg_complete,
	e1000_serdes_link_forced_up
};

/* Receive Descriptor - Extended */
union e1000_rx_desc_extended {
	struct {
		__le64 buffer_addr;
		__le64 reserved;
	} read;
	struct {
		struct {
			__le32 mrq;	      /* Multiple Rx Queues */
			union {
				__le32 rss;	    /* RSS Hash */
				struct {
					__le16 ip_id;  /* IP id */
					__le16 csum;   /* Packet Checksum */
				} csum_ip;
			} hi_dword;
		} lower;
		struct {
			__le32 status_error;     /* ext status/error */
			__le16 length;
			__le16 vlan;	     /* VLAN tag */
		} upper;
	} wb;  /* writeback */
};

#define MAX_PS_BUFFERS 4

/* Number of packet split data buffers (not including the header buffer) */
#define PS_PAGE_BUFFERS	(MAX_PS_BUFFERS - 1)

/* Receive Descriptor - Packet Split */
union e1000_rx_desc_packet_split {
	struct {
		/* one buffer for protocol header(s), three data buffers */
		__le64 buffer_addr[MAX_PS_BUFFERS];
	} read;
	struct {
		struct {
			__le32 mrq;	      /* Multiple Rx Queues */
			union {
				__le32 rss;	      /* RSS Hash */
				struct {
					__le16 ip_id;    /* IP id */
					__le16 csum;     /* Packet Checksum */
				} csum_ip;
			} hi_dword;
		} lower;
		struct {
			__le32 status_error;     /* ext status/error */
			__le16 length0;	  /* length of buffer 0 */
			__le16 vlan;	     /* VLAN tag */
		} middle;
		struct {
			__le16 header_status;
			/* length of buffers 1-3 */
			__le16 length[PS_PAGE_BUFFERS];
		} upper;
		__le64 reserved;
	} wb; /* writeback */
};

/* Transmit Descriptor */
struct e1000_tx_desc {
	__le64 buffer_addr;      /* Address of the descriptor's data buffer */
	union {
		__le32 data;
		struct {
			__le16 length;    /* Data buffer length */
			u8 cso;	/* Checksum offset */
			u8 cmd;	/* Descriptor control */
		} flags;
	} lower;
	union {
		__le32 data;
		struct {
			u8 status;     /* Descriptor status */
			u8 css;	/* Checksum start */
			__le16 special;
		} fields;
	} upper;
};

/* Offload Context Descriptor */
struct e1000_context_desc {
	union {
		__le32 ip_config;
		struct {
			u8 ipcss;      /* IP checksum start */
			u8 ipcso;      /* IP checksum offset */
			__le16 ipcse;     /* IP checksum end */
		} ip_fields;
	} lower_setup;
	union {
		__le32 tcp_config;
		struct {
			u8 tucss;      /* TCP checksum start */
			u8 tucso;      /* TCP checksum offset */
			__le16 tucse;     /* TCP checksum end */
		} tcp_fields;
	} upper_setup;
	__le32 cmd_and_length;
	union {
		__le32 data;
		struct {
			u8 status;     /* Descriptor status */
			u8 hdr_len;    /* Header length */
			__le16 mss;       /* Maximum segment size */
		} fields;
	} tcp_seg_setup;
};

/* Offload data descriptor */
struct e1000_data_desc {
	__le64 buffer_addr;   /* Address of the descriptor's buffer address */
	union {
		__le32 data;
		struct {
			__le16 length;    /* Data buffer length */
			u8 typ_len_ext;
			u8 cmd;
		} flags;
	} lower;
	union {
		__le32 data;
		struct {
			u8 status;     /* Descriptor status */
			u8 popts;      /* Packet Options */
			__le16 special;
		} fields;
	} upper;
};

/* Statistics counters collected by the MAC */
struct e1000_hw_stats {
	u64 crcerrs;
	u64 algnerrc;
	u64 symerrs;
	u64 rxerrc;
	u64 mpc;
	u64 scc;
	u64 ecol;
	u64 mcc;
	u64 latecol;
	u64 colc;
	u64 dc;
	u64 tncrs;
	u64 sec;
	u64 cexterr;
	u64 rlec;
	u64 xonrxc;
	u64 xontxc;
	u64 xoffrxc;
	u64 xofftxc;
	u64 fcruc;
	u64 prc64;
	u64 prc127;
	u64 prc255;
	u64 prc511;
	u64 prc1023;
	u64 prc1522;
	u64 gprc;
	u64 bprc;
	u64 mprc;
	u64 gptc;
	u64 gorc;
	u64 gotc;
	u64 rnbc;
	u64 ruc;
	u64 rfc;
	u64 roc;
	u64 rjc;
	u64 mgprc;
	u64 mgpdc;
	u64 mgptc;
	u64 tor;
	u64 tot;
	u64 tpr;
	u64 tpt;
	u64 ptc64;
	u64 ptc127;
	u64 ptc255;
	u64 ptc511;
	u64 ptc1023;
	u64 ptc1522;
	u64 mptc;
	u64 bptc;
	u64 tsctc;
	u64 tsctfc;
	u64 iac;
	u64 icrxptc;
	u64 icrxatc;
	u64 ictxptc;
	u64 ictxatc;
	u64 ictxqec;
	u64 ictxqmtc;
	u64 icrxdmtc;
	u64 icrxoc;
};

struct e1000_phy_stats {
	u32 idle_errors;
	u32 receive_errors;
};

struct e1000_host_mng_dhcp_cookie {
	u32 signature;
	u8 status;
	u8 reserved0;
	u16 vlan_id;
	u32 reserved1;
	u16 reserved2;
	u8 reserved3;
	u8 checksum;
};

/* Host Interface "Rev 1" */
struct e1000_host_command_header {
	u8 command_id;
	u8 command_length;
	u8 command_options;
	u8 checksum;
};

#define E1000_HI_MAX_DATA_LENGTH	252
struct e1000_host_command_info {
	struct e1000_host_command_header command_header;
	u8 command_data[E1000_HI_MAX_DATA_LENGTH];
};

/* Host Interface "Rev 2" */
struct e1000_host_mng_command_header {
	u8 command_id;
	u8 checksum;
	u16 reserved1;
	u16 reserved2;
	u16 command_length;
};

#define E1000_HI_MAX_MNG_DATA_LENGTH	0x6F8
struct e1000_host_mng_command_info {
	struct e1000_host_mng_command_header command_header;
	u8 command_data[E1000_HI_MAX_MNG_DATA_LENGTH];
};

#include "mac.h"
#include "phy.h"
#include "nvm.h"
#include "manage.h"

/* Function pointers for the MAC. */
struct e1000_mac_operations {
	s32  (*id_led_init)(struct e1000_hw *);
	s32  (*blink_led)(struct e1000_hw *);
	bool (*check_mng_mode)(struct e1000_hw *);
	s32  (*check_for_link)(struct e1000_hw *);
	s32  (*cleanup_led)(struct e1000_hw *);
	void (*clear_hw_cntrs)(struct e1000_hw *);
	void (*clear_vfta)(struct e1000_hw *);
	s32  (*get_bus_info)(struct e1000_hw *);
	void (*set_lan_id)(struct e1000_hw *);
	s32  (*get_link_up_info)(struct e1000_hw *, u16 *, u16 *);
	s32  (*led_on)(struct e1000_hw *);
	s32  (*led_off)(struct e1000_hw *);
	void (*update_mc_addr_list)(struct e1000_hw *, u8 *, u32);
	s32  (*reset_hw)(struct e1000_hw *);
	s32  (*init_hw)(struct e1000_hw *);
	s32  (*setup_link)(struct e1000_hw *);
	s32  (*setup_physical_interface)(struct e1000_hw *);
	s32  (*setup_led)(struct e1000_hw *);
	void (*write_vfta)(struct e1000_hw *, u32, u32);
	void (*config_collision_dist)(struct e1000_hw *);
	int  (*rar_set)(struct e1000_hw *, u8 *, u32);
	s32  (*read_mac_addr)(struct e1000_hw *);
	u32  (*rar_get_count)(struct e1000_hw *);
};

/* When to use various PHY register access functions:
 *
 *                 Func   Caller
 *   Function      Does   Does    When to use
 *   ~~~~~~~~~~~~  ~~~~~  ~~~~~~  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *   X_reg         L,P,A  n/a     for simple PHY reg accesses
 *   X_reg_locked  P,A    L       for multiple accesses of different regs
 *                                on different pages
 *   X_reg_page    A      L,P     for multiple accesses of different regs
 *                                on the same page
 *
 * Where X=[read|write], L=locking, P=sets page, A=register access
 *
 */
struct e1000_phy_operations {
	s32  (*acquire)(struct e1000_hw *);
	s32  (*cfg_on_link_up)(struct e1000_hw *);
	s32  (*check_polarity)(struct e1000_hw *);
	s32  (*check_reset_block)(struct e1000_hw *);
	s32  (*commit)(struct e1000_hw *);
	s32  (*force_speed_duplex)(struct e1000_hw *);
	s32  (*get_cfg_done)(struct e1000_hw *hw);
	s32  (*get_cable_length)(struct e1000_hw *);
	s32  (*get_info)(struct e1000_hw *);
	s32  (*set_page)(struct e1000_hw *, u16);
	s32  (*read_reg)(struct e1000_hw *, u32, u16 *);
	s32  (*read_reg_locked)(struct e1000_hw *, u32, u16 *);
	s32  (*read_reg_page)(struct e1000_hw *, u32, u16 *);
	void (*release)(struct e1000_hw *);
	s32  (*reset)(struct e1000_hw *);
	s32  (*set_d0_lplu_state)(struct e1000_hw *, bool);
	s32  (*set_d3_lplu_state)(struct e1000_hw *, bool);
	s32  (*write_reg)(struct e1000_hw *, u32, u16);
	s32  (*write_reg_locked)(struct e1000_hw *, u32, u16);
	s32  (*write_reg_page)(struct e1000_hw *, u32, u16);
	void (*power_up)(struct e1000_hw *);
	void (*power_down)(struct e1000_hw *);
};

/* Function pointers for the NVM. */
struct e1000_nvm_operations {
	s32  (*acquire)(struct e1000_hw *);
	s32  (*read)(struct e1000_hw *, u16, u16, u16 *);
	void (*release)(struct e1000_hw *);
	void (*reload)(struct e1000_hw *);
	s32  (*update)(struct e1000_hw *);
	s32  (*valid_led_default)(struct e1000_hw *, u16 *);
	s32  (*validate)(struct e1000_hw *);
	s32  (*write)(struct e1000_hw *, u16, u16, u16 *);
};

struct e1000_mac_info {
	struct e1000_mac_operations ops;
	u8 addr[ETH_ALEN];
	u8 perm_addr[ETH_ALEN];

	enum e1000_mac_type type;

	u32 collision_delta;
	u32 ledctl_default;
	u32 ledctl_mode1;
	u32 ledctl_mode2;
	u32 mc_filter_type;
	u32 tx_packet_delta;
	u32 txcw;

	u16 current_ifs_val;
	u16 ifs_max_val;
	u16 ifs_min_val;
	u16 ifs_ratio;
	u16 ifs_step_size;
	u16 mta_reg_count;

	/* Maximum size of the MTA register table in all supported adapters */
#define MAX_MTA_REG 128
	u32 mta_shadow[MAX_MTA_REG];
	u16 rar_entry_count;

	u8 forced_speed_duplex;

	bool adaptive_ifs;
	bool has_fwsm;
	bool arc_subsystem_valid;
	bool autoneg;
	bool autoneg_failed;
	bool get_link_status;
	bool in_ifs_mode;
	bool serdes_has_link;
	bool tx_pkt_filtering;
	enum e1000_serdes_link_state serdes_link_state;
};

struct e1000_phy_info {
	struct e1000_phy_operations ops;

	enum e1000_phy_type type;

	enum e1000_1000t_rx_status local_rx;
	enum e1000_1000t_rx_status remote_rx;
	enum e1000_ms_type ms_type;
	enum e1000_ms_type original_ms_type;
	enum e1000_rev_polarity cable_polarity;
	enum e1000_smart_speed smart_speed;

	u32 addr;
	u32 id;
	u32 reset_delay_us;	/* in usec */
	u32 revision;

	enum e1000_media_type media_type;

	u16 autoneg_advertised;
	u16 autoneg_mask;
	u16 cable_length;
	u16 max_cable_length;
	u16 min_cable_length;

	u8 mdix;

	bool disable_polarity_correction;
	bool is_mdix;
	bool polarity_correction;
	bool speed_downgraded;
	bool autoneg_wait_to_complete;
};

struct e1000_nvm_info {
	struct e1000_nvm_operations ops;

	enum e1000_nvm_type type;
	enum e1000_nvm_override override;

	u32 flash_bank_size;
	u32 flash_base_addr;

	u16 word_size;
	u16 delay_usec;
	u16 address_bits;
	u16 opcode_bits;
	u16 page_size;
};

struct e1000_bus_info {
	enum e1000_bus_width width;

	u16 func;
};

struct e1000_fc_info {
	u32 high_water;          /* Flow control high-water mark */
	u32 low_water;           /* Flow control low-water mark */
	u16 pause_time;          /* Flow control pause timer */
	u16 refresh_time;        /* Flow control refresh timer */
	bool send_xon;           /* Flow control send XON */
	bool strict_ieee;        /* Strict IEEE mode */
	enum e1000_fc_mode current_mode; /* FC mode in effect */
	enum e1000_fc_mode requested_mode; /* FC mode requested by caller */
};

struct e1000_dev_spec_82571 {
	bool laa_is_present;
	u32 smb_counter;
};

struct e1000_dev_spec_80003es2lan {
	bool mdic_wa_enable;
};

struct e1000_shadow_ram {
	u16 value;
	bool modified;
};

#define E1000_ICH8_SHADOW_RAM_WORDS		2048

/* I218 PHY Ultra Low Power (ULP) states */
enum e1000_ulp_state {
	e1000_ulp_state_unknown,
	e1000_ulp_state_off,
	e1000_ulp_state_on,
};

struct e1000_dev_spec_ich8lan {
	bool kmrn_lock_loss_workaround_enabled;
	struct e1000_shadow_ram shadow_ram[E1000_ICH8_SHADOW_RAM_WORDS];
	bool nvm_k1_enabled;
	bool eee_disable;
	u16 eee_lp_ability;
	enum e1000_ulp_state ulp_state;
};

struct e1000_hw {
	struct e1000_adapter *adapter;

	void __iomem *hw_addr;
	void __iomem *flash_address;

	struct e1000_mac_info mac;
	struct e1000_fc_info fc;
	struct e1000_phy_info phy;
	struct e1000_nvm_info nvm;
	struct e1000_bus_info bus;
	struct e1000_host_mng_dhcp_cookie mng_cookie;

	union {
		struct e1000_dev_spec_82571 e82571;
		struct e1000_dev_spec_80003es2lan e80003es2lan;
		struct e1000_dev_spec_ich8lan ich8lan;
	} dev_spec;
};

#include "82571.h"
#include "80003es2lan.h"
#include "ich8lan.h"

#endif