drivers/net/ethernet/sfc/nic.h - nest-hello/linux-3.10 - Git at Google

 /****************************************************************************
  * Driver for Solarflare Solarstorm network controllers and boards
  * Copyright 2005-2006 Fen Systems Ltd.
  * Copyright 2006-2011 Solarflare Communications Inc.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 as published
  * by the Free Software Foundation, incorporated herein by reference.
  */

 #ifndef EFX_NIC_H
 #define EFX_NIC_H

 #include <linux/net_tstamp.h>
 #include <linux/i2c-algo-bit.h>
 #include "net_driver.h"
 #include "efx.h"
 #include "mcdi.h"
 #include "spi.h"

 /*
  * Falcon hardware control
  */

 enum {
 	EFX_REV_FALCON_A0 = 0,
 	EFX_REV_FALCON_A1 = 1,
 	EFX_REV_FALCON_B0 = 2,
 	EFX_REV_SIENA_A0 = 3,
 };

 static inline int efx_nic_rev(struct efx_nic *efx)
 {
 	return efx->type->revision;
 }

 extern u32 efx_nic_fpga_ver(struct efx_nic *efx);

 /* NIC has two interlinked PCI functions for the same port. */
 static inline bool efx_nic_is_dual_func(struct efx_nic *efx)
 {
 	return efx_nic_rev(efx) < EFX_REV_FALCON_B0;
 }

 enum {
 	PHY_TYPE_NONE = 0,
 	PHY_TYPE_TXC43128 = 1,
 	PHY_TYPE_88E1111 = 2,
 	PHY_TYPE_SFX7101 = 3,
 	PHY_TYPE_QT2022C2 = 4,
 	PHY_TYPE_PM8358 = 6,
 	PHY_TYPE_SFT9001A = 8,
 	PHY_TYPE_QT2025C = 9,
 	PHY_TYPE_SFT9001B = 10,
 };

 #define FALCON_XMAC_LOOPBACKS			\
 	((1 << LOOPBACK_XGMII) |		\
 	 (1 << LOOPBACK_XGXS) |			\
 	 (1 << LOOPBACK_XAUI))

 #define FALCON_GMAC_LOOPBACKS			\
 	(1 << LOOPBACK_GMAC)

 /* Alignment of PCIe DMA boundaries (4KB) */
 #define EFX_PAGE_SIZE	4096
 /* Size and alignment of buffer table entries (same) */
 #define EFX_BUF_SIZE	EFX_PAGE_SIZE

 /**
  * struct falcon_board_type - board operations and type information
  * @id: Board type id, as found in NVRAM
  * @init: Allocate resources and initialise peripheral hardware
  * @init_phy: Do board-specific PHY initialisation
  * @fini: Shut down hardware and free resources
  * @set_id_led: Set state of identifying LED or revert to automatic function
  * @monitor: Board-specific health check function
  */
 struct falcon_board_type {
 	u8 id;
 	int (*init) (struct efx_nic *nic);
 	void (*init_phy) (struct efx_nic *efx);
 	void (*fini) (struct efx_nic *nic);
 	void (*set_id_led) (struct efx_nic *efx, enum efx_led_mode mode);
 	int (*monitor) (struct efx_nic *nic);
 };

 /**
  * struct falcon_board - board information
  * @type: Type of board
  * @major: Major rev. ('A', 'B' ...)
  * @minor: Minor rev. (0, 1, ...)
  * @i2c_adap: I2C adapter for on-board peripherals
  * @i2c_data: Data for bit-banging algorithm
  * @hwmon_client: I2C client for hardware monitor
  * @ioexp_client: I2C client for power/port control
  */
 struct falcon_board {
 	const struct falcon_board_type *type;
 	int major;
 	int minor;
 	struct i2c_adapter i2c_adap;
 	struct i2c_algo_bit_data i2c_data;
 	struct i2c_client *hwmon_client, *ioexp_client;
 };

 /**
  * struct falcon_nic_data - Falcon NIC state
  * @pci_dev2: Secondary function of Falcon A
  * @board: Board state and functions
  * @stats_disable_count: Nest count for disabling statistics fetches
  * @stats_pending: Is there a pending DMA of MAC statistics.
  * @stats_timer: A timer for regularly fetching MAC statistics.
  * @stats_dma_done: Pointer to the flag which indicates DMA completion.
  * @spi_flash: SPI flash device
  * @spi_eeprom: SPI EEPROM device
  * @spi_lock: SPI bus lock
  * @mdio_lock: MDIO bus lock
  * @xmac_poll_required: XMAC link state needs polling
  */
 struct falcon_nic_data {
 	struct pci_dev *pci_dev2;
 	struct falcon_board board;
 	unsigned int stats_disable_count;
 	bool stats_pending;
 	struct timer_list stats_timer;
 	u32 *stats_dma_done;
 	struct efx_spi_device spi_flash;
 	struct efx_spi_device spi_eeprom;
 	struct mutex spi_lock;
 	struct mutex mdio_lock;
 	bool xmac_poll_required;
 };

 static inline struct falcon_board *falcon_board(struct efx_nic *efx)
 {
 	struct falcon_nic_data *data = efx->nic_data;
 	return &data->board;
 }

 /**
  * struct siena_nic_data - Siena NIC state
  * @mcdi: Management-Controller-to-Driver Interface
  * @wol_filter_id: Wake-on-LAN packet filter id
  * @hwmon: Hardware monitor state
  */
 struct siena_nic_data {
 	struct efx_mcdi_iface mcdi;
 	int wol_filter_id;
 #ifdef CONFIG_SFC_MCDI_MON
 	struct efx_mcdi_mon hwmon;
 #endif
 };

 #ifdef CONFIG_SFC_MCDI_MON
 static inline struct efx_mcdi_mon *efx_mcdi_mon(struct efx_nic *efx)
 {
 	struct siena_nic_data *nic_data;
 	EFX_BUG_ON_PARANOID(efx_nic_rev(efx) < EFX_REV_SIENA_A0);
 	nic_data = efx->nic_data;
 	return &nic_data->hwmon;
 }
 #endif

 /*
  * On the SFC9000 family each port is associated with 1 PCI physical
  * function (PF) handled by sfc and a configurable number of virtual
  * functions (VFs) that may be handled by some other driver, often in
  * a VM guest.  The queue pointer registers are mapped in both PF and
  * VF BARs such that an 8K region provides access to a single RX, TX
  * and event queue (collectively a Virtual Interface, VI or VNIC).
  *
  * The PF has access to all 1024 VIs while VFs are mapped to VIs
  * according to VI_BASE and VI_SCALE: VF i has access to VIs numbered
  * in range [VI_BASE + i << VI_SCALE, VI_BASE + i + 1 << VI_SCALE).
  * The number of VIs and the VI_SCALE value are configurable but must
  * be established at boot time by firmware.
  */

 /* Maximum VI_SCALE parameter supported by Siena */
 #define EFX_VI_SCALE_MAX 6
 /* Base VI to use for SR-IOV. Must be aligned to (1 << EFX_VI_SCALE_MAX),
  * so this is the smallest allowed value. */
 #define EFX_VI_BASE 128U
 /* Maximum number of VFs allowed */
 #define EFX_VF_COUNT_MAX 127
 /* Limit EVQs on VFs to be only 8k to reduce buffer table reservation */
 #define EFX_MAX_VF_EVQ_SIZE 8192UL
 /* The number of buffer table entries reserved for each VI on a VF */
 #define EFX_VF_BUFTBL_PER_VI					\
 	((EFX_MAX_VF_EVQ_SIZE + 2 * EFX_MAX_DMAQ_SIZE) *	\
 	 sizeof(efx_qword_t) / EFX_BUF_SIZE)

 #ifdef CONFIG_SFC_SRIOV

 static inline bool efx_sriov_wanted(struct efx_nic *efx)
 {
 	return efx->vf_count != 0;
 }
 static inline bool efx_sriov_enabled(struct efx_nic *efx)
 {
 	return efx->vf_init_count != 0;
 }
 static inline unsigned int efx_vf_size(struct efx_nic *efx)
 {
 	return 1 << efx->vi_scale;
 }

 extern int efx_init_sriov(void);
 extern void efx_sriov_probe(struct efx_nic *efx);
 extern int efx_sriov_init(struct efx_nic *efx);
 extern void efx_sriov_mac_address_changed(struct efx_nic *efx);
 extern void efx_sriov_tx_flush_done(struct efx_nic *efx, efx_qword_t *event);
 extern void efx_sriov_rx_flush_done(struct efx_nic *efx, efx_qword_t *event);
 extern void efx_sriov_event(struct efx_channel *channel, efx_qword_t *event);
 extern void efx_sriov_desc_fetch_err(struct efx_nic *efx, unsigned dmaq);
 extern void efx_sriov_flr(struct efx_nic *efx, unsigned flr);
 extern void efx_sriov_reset(struct efx_nic *efx);
 extern void efx_sriov_fini(struct efx_nic *efx);
 extern void efx_fini_sriov(void);

 #else

 static inline bool efx_sriov_wanted(struct efx_nic *efx) { return false; }
 static inline bool efx_sriov_enabled(struct efx_nic *efx) { return false; }
 static inline unsigned int efx_vf_size(struct efx_nic *efx) { return 0; }

 static inline int efx_init_sriov(void) { return 0; }
 static inline void efx_sriov_probe(struct efx_nic *efx) {}
 static inline int efx_sriov_init(struct efx_nic *efx) { return -EOPNOTSUPP; }
 static inline void efx_sriov_mac_address_changed(struct efx_nic *efx) {}
 static inline void efx_sriov_tx_flush_done(struct efx_nic *efx,
 					   efx_qword_t *event) {}
 static inline void efx_sriov_rx_flush_done(struct efx_nic *efx,
 					   efx_qword_t *event) {}
 static inline void efx_sriov_event(struct efx_channel *channel,
 				   efx_qword_t *event) {}
 static inline void efx_sriov_desc_fetch_err(struct efx_nic *efx, unsigned dmaq) {}
 static inline void efx_sriov_flr(struct efx_nic *efx, unsigned flr) {}
 static inline void efx_sriov_reset(struct efx_nic *efx) {}
 static inline void efx_sriov_fini(struct efx_nic *efx) {}
 static inline void efx_fini_sriov(void) {}

 #endif

 extern int efx_sriov_set_vf_mac(struct net_device *dev, int vf, u8 *mac);
 extern int efx_sriov_set_vf_vlan(struct net_device *dev, int vf,
 				 u16 vlan, u8 qos);
 extern int efx_sriov_get_vf_config(struct net_device *dev, int vf,
 				   struct ifla_vf_info *ivf);
 extern int efx_sriov_set_vf_spoofchk(struct net_device *net_dev, int vf,
 				     bool spoofchk);

 struct ethtool_ts_info;
 extern void efx_ptp_probe(struct efx_nic *efx);
 extern int efx_ptp_ioctl(struct efx_nic *efx, struct ifreq *ifr, int cmd);
 extern int efx_ptp_get_ts_info(struct net_device *net_dev,
 			       struct ethtool_ts_info *ts_info);
 extern bool efx_ptp_is_ptp_tx(struct efx_nic *efx, struct sk_buff *skb);
 extern int efx_ptp_tx(struct efx_nic *efx, struct sk_buff *skb);
 extern void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev);

 extern const struct efx_nic_type falcon_a1_nic_type;
 extern const struct efx_nic_type falcon_b0_nic_type;
 extern const struct efx_nic_type siena_a0_nic_type;

 /**************************************************************************
  *
  * Externs
  *
  **************************************************************************
  */

 extern int falcon_probe_board(struct efx_nic *efx, u16 revision_info);

 /* TX data path */
 extern int efx_nic_probe_tx(struct efx_tx_queue *tx_queue);
 extern void efx_nic_init_tx(struct efx_tx_queue *tx_queue);
 extern void efx_nic_fini_tx(struct efx_tx_queue *tx_queue);
 extern void efx_nic_remove_tx(struct efx_tx_queue *tx_queue);
 extern void efx_nic_push_buffers(struct efx_tx_queue *tx_queue);

 /* RX data path */
 extern int efx_nic_probe_rx(struct efx_rx_queue *rx_queue);
 extern void efx_nic_init_rx(struct efx_rx_queue *rx_queue);
 extern void efx_nic_fini_rx(struct efx_rx_queue *rx_queue);
 extern void efx_nic_remove_rx(struct efx_rx_queue *rx_queue);
 extern void efx_nic_notify_rx_desc(struct efx_rx_queue *rx_queue);
 extern void efx_nic_generate_fill_event(struct efx_rx_queue *rx_queue);

 /* Event data path */
 extern int efx_nic_probe_eventq(struct efx_channel *channel);
 extern void efx_nic_init_eventq(struct efx_channel *channel);
 extern void efx_nic_fini_eventq(struct efx_channel *channel);
 extern void efx_nic_remove_eventq(struct efx_channel *channel);
 extern int efx_nic_process_eventq(struct efx_channel *channel, int rx_quota);
 extern void efx_nic_eventq_read_ack(struct efx_channel *channel);
 extern bool efx_nic_event_present(struct efx_channel *channel);

 /* MAC/PHY */
 extern void falcon_drain_tx_fifo(struct efx_nic *efx);
 extern void falcon_reconfigure_mac_wrapper(struct efx_nic *efx);
 extern bool falcon_xmac_check_fault(struct efx_nic *efx);
 extern int falcon_reconfigure_xmac(struct efx_nic *efx);
 extern void falcon_update_stats_xmac(struct efx_nic *efx);

 /* Some statistics are computed as A - B where A and B each increase
  * linearly with some hardware counter(s) and the counters are read
  * asynchronously.  If the counters contributing to B are always read
  * after those contributing to A, the computed value may be lower than
  * the true value by some variable amount, and may decrease between
  * subsequent computations.
  *
  * We should never allow statistics to decrease or to exceed the true
  * value.  Since the computed value will never be greater than the
  * true value, we can achieve this by only storing the computed value
  * when it increases.
  */
 static inline void efx_update_diff_stat(u64 *stat, u64 diff)
 {
 	if ((s64)(diff - *stat) > 0)
 		*stat = diff;
 }

 /* Interrupts and test events */
 extern int efx_nic_init_interrupt(struct efx_nic *efx);
 extern void efx_nic_enable_interrupts(struct efx_nic *efx);
 extern void efx_nic_event_test_start(struct efx_channel *channel);
 extern void efx_nic_irq_test_start(struct efx_nic *efx);
 extern void efx_nic_disable_interrupts(struct efx_nic *efx);
 extern void efx_nic_fini_interrupt(struct efx_nic *efx);
 extern irqreturn_t efx_nic_fatal_interrupt(struct efx_nic *efx);
 extern irqreturn_t falcon_legacy_interrupt_a1(int irq, void *dev_id);
 extern void falcon_irq_ack_a1(struct efx_nic *efx);

 static inline int efx_nic_event_test_irq_cpu(struct efx_channel *channel)
 {
 	return ACCESS_ONCE(channel->event_test_cpu);
 }
 static inline int efx_nic_irq_test_irq_cpu(struct efx_nic *efx)
 {
 	return ACCESS_ONCE(efx->last_irq_cpu);
 }

 /* Global Resources */
 extern int efx_nic_flush_queues(struct efx_nic *efx);
 extern void siena_prepare_flush(struct efx_nic *efx);
 extern void siena_finish_flush(struct efx_nic *efx);
 extern void falcon_start_nic_stats(struct efx_nic *efx);
 extern void falcon_stop_nic_stats(struct efx_nic *efx);
 extern void falcon_setup_xaui(struct efx_nic *efx);
 extern int falcon_reset_xaui(struct efx_nic *efx);
 extern void
 efx_nic_dimension_resources(struct efx_nic *efx, unsigned sram_lim_qw);
 extern void efx_nic_init_common(struct efx_nic *efx);
 extern void efx_nic_push_rx_indir_table(struct efx_nic *efx);

 int efx_nic_alloc_buffer(struct efx_nic *efx, struct efx_buffer *buffer,
 			 unsigned int len);
 void efx_nic_free_buffer(struct efx_nic *efx, struct efx_buffer *buffer);

 /* Tests */
 struct efx_nic_register_test {
 	unsigned address;
 	efx_oword_t mask;
 };
 extern int efx_nic_test_registers(struct efx_nic *efx,
 				  const struct efx_nic_register_test *regs,
 				  size_t n_regs);

 extern size_t efx_nic_get_regs_len(struct efx_nic *efx);
 extern void efx_nic_get_regs(struct efx_nic *efx, void *buf);

 /**************************************************************************
  *
  * Falcon MAC stats
  *
  **************************************************************************
  */

 #define FALCON_STAT_OFFSET(falcon_stat) EFX_VAL(falcon_stat, offset)
 #define FALCON_STAT_WIDTH(falcon_stat) EFX_VAL(falcon_stat, WIDTH)

 /* Retrieve statistic from statistics block */
 #define FALCON_STAT(efx, falcon_stat, efx_stat) do {		\
 	if (FALCON_STAT_WIDTH(falcon_stat) == 16)		\
 		(efx)->mac_stats.efx_stat += le16_to_cpu(	\
 			*((__force __le16 *)				\
 			  (efx->stats_buffer.addr +		\
 			   FALCON_STAT_OFFSET(falcon_stat))));	\
 	else if (FALCON_STAT_WIDTH(falcon_stat) == 32)		\
 		(efx)->mac_stats.efx_stat += le32_to_cpu(	\
 			*((__force __le32 *)				\
 			  (efx->stats_buffer.addr +		\
 			   FALCON_STAT_OFFSET(falcon_stat))));	\
 	else							\
 		(efx)->mac_stats.efx_stat += le64_to_cpu(	\
 			*((__force __le64 *)				\
 			  (efx->stats_buffer.addr +		\
 			   FALCON_STAT_OFFSET(falcon_stat))));	\
 	} while (0)

 #define FALCON_MAC_STATS_SIZE 0x100

 #define MAC_DATA_LBN 0
 #define MAC_DATA_WIDTH 32

 extern void efx_generate_event(struct efx_nic *efx, unsigned int evq,
 			       efx_qword_t *event);

 extern void falcon_poll_xmac(struct efx_nic *efx);

 #endif /* EFX_NIC_H */
	/****************************************************************************
	* Driver for Solarflare Solarstorm network controllers and boards
	* Copyright 2005-2006 Fen Systems Ltd.
	* Copyright 2006-2011 Solarflare Communications Inc.
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 as published
	* by the Free Software Foundation, incorporated herein by reference.
	*/

	#ifndef EFX_NIC_H
	#define EFX_NIC_H

	#include <linux/net_tstamp.h>
	#include <linux/i2c-algo-bit.h>
	#include "net_driver.h"
	#include "efx.h"
	#include "mcdi.h"
	#include "spi.h"

	/*
	* Falcon hardware control
	*/

	enum {
	EFX_REV_FALCON_A0 = 0,
	EFX_REV_FALCON_A1 = 1,
	EFX_REV_FALCON_B0 = 2,
	EFX_REV_SIENA_A0 = 3,
	};

	static inline int efx_nic_rev(struct efx_nic *efx)
	{
	return efx->type->revision;
	}

	extern u32 efx_nic_fpga_ver(struct efx_nic *efx);

	/* NIC has two interlinked PCI functions for the same port. */
	static inline bool efx_nic_is_dual_func(struct efx_nic *efx)
	{
	return efx_nic_rev(efx) < EFX_REV_FALCON_B0;
	}

	enum {
	PHY_TYPE_NONE = 0,
	PHY_TYPE_TXC43128 = 1,
	PHY_TYPE_88E1111 = 2,
	PHY_TYPE_SFX7101 = 3,
	PHY_TYPE_QT2022C2 = 4,
	PHY_TYPE_PM8358 = 6,
	PHY_TYPE_SFT9001A = 8,
	PHY_TYPE_QT2025C = 9,
	PHY_TYPE_SFT9001B = 10,
	};

	#define FALCON_XMAC_LOOPBACKS \
	((1 << LOOPBACK_XGMII) \| \
	(1 << LOOPBACK_XGXS) \| \
	(1 << LOOPBACK_XAUI))

	#define FALCON_GMAC_LOOPBACKS \
	(1 << LOOPBACK_GMAC)

	/* Alignment of PCIe DMA boundaries (4KB) */
	#define EFX_PAGE_SIZE 4096
	/* Size and alignment of buffer table entries (same) */
	#define EFX_BUF_SIZE EFX_PAGE_SIZE

	/**
	* struct falcon_board_type - board operations and type information
	* @id: Board type id, as found in NVRAM
	* @init: Allocate resources and initialise peripheral hardware
	* @init_phy: Do board-specific PHY initialisation
	* @fini: Shut down hardware and free resources
	* @set_id_led: Set state of identifying LED or revert to automatic function
	* @monitor: Board-specific health check function
	*/
	struct falcon_board_type {
	u8 id;
	int (init) (struct efx_nic nic);
	void (init_phy) (struct efx_nic efx);
	void (fini) (struct efx_nic nic);
	void (set_id_led) (struct efx_nic efx, enum efx_led_mode mode);
	int (monitor) (struct efx_nic nic);
	};

	/**
	* struct falcon_board - board information
	* @type: Type of board
	* @major: Major rev. ('A', 'B' ...)
	* @minor: Minor rev. (0, 1, ...)
	* @i2c_adap: I2C adapter for on-board peripherals
	* @i2c_data: Data for bit-banging algorithm
	* @hwmon_client: I2C client for hardware monitor
	* @ioexp_client: I2C client for power/port control
	*/
	struct falcon_board {
	const struct falcon_board_type *type;
	int major;
	int minor;
	struct i2c_adapter i2c_adap;
	struct i2c_algo_bit_data i2c_data;
	struct i2c_client hwmon_client, ioexp_client;
	};

	/**
	* struct falcon_nic_data - Falcon NIC state
	* @pci_dev2: Secondary function of Falcon A
	* @board: Board state and functions
	* @stats_disable_count: Nest count for disabling statistics fetches
	* @stats_pending: Is there a pending DMA of MAC statistics.
	* @stats_timer: A timer for regularly fetching MAC statistics.
	* @stats_dma_done: Pointer to the flag which indicates DMA completion.
	* @spi_flash: SPI flash device
	* @spi_eeprom: SPI EEPROM device
	* @spi_lock: SPI bus lock
	* @mdio_lock: MDIO bus lock
	* @xmac_poll_required: XMAC link state needs polling
	*/
	struct falcon_nic_data {
	struct pci_dev *pci_dev2;
	struct falcon_board board;
	unsigned int stats_disable_count;
	bool stats_pending;
	struct timer_list stats_timer;
	u32 *stats_dma_done;
	struct efx_spi_device spi_flash;
	struct efx_spi_device spi_eeprom;
	struct mutex spi_lock;
	struct mutex mdio_lock;
	bool xmac_poll_required;
	};

	static inline struct falcon_board falcon_board(struct efx_nic efx)
	{
	struct falcon_nic_data *data = efx->nic_data;
	return &data->board;
	}

	/**
	* struct siena_nic_data - Siena NIC state
	* @mcdi: Management-Controller-to-Driver Interface
	* @wol_filter_id: Wake-on-LAN packet filter id
	* @hwmon: Hardware monitor state
	*/
	struct siena_nic_data {
	struct efx_mcdi_iface mcdi;
	int wol_filter_id;
	#ifdef CONFIG_SFC_MCDI_MON
	struct efx_mcdi_mon hwmon;
	#endif
	};

	#ifdef CONFIG_SFC_MCDI_MON
	static inline struct efx_mcdi_mon efx_mcdi_mon(struct efx_nic efx)
	{
	struct siena_nic_data *nic_data;
	EFX_BUG_ON_PARANOID(efx_nic_rev(efx) < EFX_REV_SIENA_A0);
	nic_data = efx->nic_data;
	return &nic_data->hwmon;
	}
	#endif

	/*
	* On the SFC9000 family each port is associated with 1 PCI physical
	* function (PF) handled by sfc and a configurable number of virtual
	* functions (VFs) that may be handled by some other driver, often in
	* a VM guest. The queue pointer registers are mapped in both PF and
	* VF BARs such that an 8K region provides access to a single RX, TX
	* and event queue (collectively a Virtual Interface, VI or VNIC).
	*
	* The PF has access to all 1024 VIs while VFs are mapped to VIs
	* according to VI_BASE and VI_SCALE: VF i has access to VIs numbered
	* in range [VI_BASE + i << VI_SCALE, VI_BASE + i + 1 << VI_SCALE).
	* The number of VIs and the VI_SCALE value are configurable but must
	* be established at boot time by firmware.
	*/

	/* Maximum VI_SCALE parameter supported by Siena */
	#define EFX_VI_SCALE_MAX 6
	/* Base VI to use for SR-IOV. Must be aligned to (1 << EFX_VI_SCALE_MAX),
	* so this is the smallest allowed value. */
	#define EFX_VI_BASE 128U
	/* Maximum number of VFs allowed */
	#define EFX_VF_COUNT_MAX 127
	/* Limit EVQs on VFs to be only 8k to reduce buffer table reservation */
	#define EFX_MAX_VF_EVQ_SIZE 8192UL
	/* The number of buffer table entries reserved for each VI on a VF */
	#define EFX_VF_BUFTBL_PER_VI \
	((EFX_MAX_VF_EVQ_SIZE + 2 * EFX_MAX_DMAQ_SIZE) * \
	sizeof(efx_qword_t) / EFX_BUF_SIZE)

	#ifdef CONFIG_SFC_SRIOV

	static inline bool efx_sriov_wanted(struct efx_nic *efx)
	{
	return efx->vf_count != 0;
	}
	static inline bool efx_sriov_enabled(struct efx_nic *efx)
	{
	return efx->vf_init_count != 0;
	}
	static inline unsigned int efx_vf_size(struct efx_nic *efx)
	{
	return 1 << efx->vi_scale;
	}

	extern int efx_init_sriov(void);
	extern void efx_sriov_probe(struct efx_nic *efx);
	extern int efx_sriov_init(struct efx_nic *efx);
	extern void efx_sriov_mac_address_changed(struct efx_nic *efx);
	extern void efx_sriov_tx_flush_done(struct efx_nic efx, efx_qword_t event);
	extern void efx_sriov_rx_flush_done(struct efx_nic efx, efx_qword_t event);
	extern void efx_sriov_event(struct efx_channel channel, efx_qword_t event);
	extern void efx_sriov_desc_fetch_err(struct efx_nic *efx, unsigned dmaq);
	extern void efx_sriov_flr(struct efx_nic *efx, unsigned flr);
	extern void efx_sriov_reset(struct efx_nic *efx);
	extern void efx_sriov_fini(struct efx_nic *efx);
	extern void efx_fini_sriov(void);

	#else

	static inline bool efx_sriov_wanted(struct efx_nic *efx) { return false; }
	static inline bool efx_sriov_enabled(struct efx_nic *efx) { return false; }
	static inline unsigned int efx_vf_size(struct efx_nic *efx) { return 0; }

	static inline int efx_init_sriov(void) { return 0; }
	static inline void efx_sriov_probe(struct efx_nic *efx) {}
	static inline int efx_sriov_init(struct efx_nic *efx) { return -EOPNOTSUPP; }
	static inline void efx_sriov_mac_address_changed(struct efx_nic *efx) {}
	static inline void efx_sriov_tx_flush_done(struct efx_nic *efx,
	efx_qword_t *event) {}
	static inline void efx_sriov_rx_flush_done(struct efx_nic *efx,
	efx_qword_t *event) {}
	static inline void efx_sriov_event(struct efx_channel *channel,
	efx_qword_t *event) {}
	static inline void efx_sriov_desc_fetch_err(struct efx_nic *efx, unsigned dmaq) {}
	static inline void efx_sriov_flr(struct efx_nic *efx, unsigned flr) {}
	static inline void efx_sriov_reset(struct efx_nic *efx) {}
	static inline void efx_sriov_fini(struct efx_nic *efx) {}
	static inline void efx_fini_sriov(void) {}

	#endif

	extern int efx_sriov_set_vf_mac(struct net_device dev, int vf, u8 mac);
	extern int efx_sriov_set_vf_vlan(struct net_device *dev, int vf,
	u16 vlan, u8 qos);
	extern int efx_sriov_get_vf_config(struct net_device *dev, int vf,
	struct ifla_vf_info *ivf);
	extern int efx_sriov_set_vf_spoofchk(struct net_device *net_dev, int vf,
	bool spoofchk);

	struct ethtool_ts_info;
	extern void efx_ptp_probe(struct efx_nic *efx);
	extern int efx_ptp_ioctl(struct efx_nic efx, struct ifreq ifr, int cmd);
	extern int efx_ptp_get_ts_info(struct net_device *net_dev,
	struct ethtool_ts_info *ts_info);
	extern bool efx_ptp_is_ptp_tx(struct efx_nic efx, struct sk_buff skb);
	extern int efx_ptp_tx(struct efx_nic efx, struct sk_buff skb);
	extern void efx_ptp_event(struct efx_nic efx, efx_qword_t ev);

	extern const struct efx_nic_type falcon_a1_nic_type;
	extern const struct efx_nic_type falcon_b0_nic_type;
	extern const struct efx_nic_type siena_a0_nic_type;

	/**************************************************************************
	*
	* Externs
	*
	**************************************************************************
	*/

	extern int falcon_probe_board(struct efx_nic *efx, u16 revision_info);

	/* TX data path */
	extern int efx_nic_probe_tx(struct efx_tx_queue *tx_queue);
	extern void efx_nic_init_tx(struct efx_tx_queue *tx_queue);
	extern void efx_nic_fini_tx(struct efx_tx_queue *tx_queue);
	extern void efx_nic_remove_tx(struct efx_tx_queue *tx_queue);
	extern void efx_nic_push_buffers(struct efx_tx_queue *tx_queue);

	/* RX data path */
	extern int efx_nic_probe_rx(struct efx_rx_queue *rx_queue);
	extern void efx_nic_init_rx(struct efx_rx_queue *rx_queue);
	extern void efx_nic_fini_rx(struct efx_rx_queue *rx_queue);
	extern void efx_nic_remove_rx(struct efx_rx_queue *rx_queue);
	extern void efx_nic_notify_rx_desc(struct efx_rx_queue *rx_queue);
	extern void efx_nic_generate_fill_event(struct efx_rx_queue *rx_queue);

	/* Event data path */
	extern int efx_nic_probe_eventq(struct efx_channel *channel);
	extern void efx_nic_init_eventq(struct efx_channel *channel);
	extern void efx_nic_fini_eventq(struct efx_channel *channel);
	extern void efx_nic_remove_eventq(struct efx_channel *channel);
	extern int efx_nic_process_eventq(struct efx_channel *channel, int rx_quota);
	extern void efx_nic_eventq_read_ack(struct efx_channel *channel);
	extern bool efx_nic_event_present(struct efx_channel *channel);

	/* MAC/PHY */
	extern void falcon_drain_tx_fifo(struct efx_nic *efx);
	extern void falcon_reconfigure_mac_wrapper(struct efx_nic *efx);
	extern bool falcon_xmac_check_fault(struct efx_nic *efx);
	extern int falcon_reconfigure_xmac(struct efx_nic *efx);
	extern void falcon_update_stats_xmac(struct efx_nic *efx);

	/* Some statistics are computed as A - B where A and B each increase
	* linearly with some hardware counter(s) and the counters are read
	* asynchronously. If the counters contributing to B are always read
	* after those contributing to A, the computed value may be lower than
	* the true value by some variable amount, and may decrease between
	* subsequent computations.
	*
	* We should never allow statistics to decrease or to exceed the true
	* value. Since the computed value will never be greater than the
	* true value, we can achieve this by only storing the computed value
	* when it increases.
	*/
	static inline void efx_update_diff_stat(u64 *stat, u64 diff)
	{
	if ((s64)(diff - *stat) > 0)
	*stat = diff;
	}

	/* Interrupts and test events */
	extern int efx_nic_init_interrupt(struct efx_nic *efx);
	extern void efx_nic_enable_interrupts(struct efx_nic *efx);
	extern void efx_nic_event_test_start(struct efx_channel *channel);
	extern void efx_nic_irq_test_start(struct efx_nic *efx);
	extern void efx_nic_disable_interrupts(struct efx_nic *efx);
	extern void efx_nic_fini_interrupt(struct efx_nic *efx);
	extern irqreturn_t efx_nic_fatal_interrupt(struct efx_nic *efx);
	extern irqreturn_t falcon_legacy_interrupt_a1(int irq, void *dev_id);
	extern void falcon_irq_ack_a1(struct efx_nic *efx);

	static inline int efx_nic_event_test_irq_cpu(struct efx_channel *channel)
	{
	return ACCESS_ONCE(channel->event_test_cpu);
	}
	static inline int efx_nic_irq_test_irq_cpu(struct efx_nic *efx)
	{
	return ACCESS_ONCE(efx->last_irq_cpu);
	}

	/* Global Resources */
	extern int efx_nic_flush_queues(struct efx_nic *efx);
	extern void siena_prepare_flush(struct efx_nic *efx);
	extern void siena_finish_flush(struct efx_nic *efx);
	extern void falcon_start_nic_stats(struct efx_nic *efx);
	extern void falcon_stop_nic_stats(struct efx_nic *efx);
	extern void falcon_setup_xaui(struct efx_nic *efx);
	extern int falcon_reset_xaui(struct efx_nic *efx);
	extern void
	efx_nic_dimension_resources(struct efx_nic *efx, unsigned sram_lim_qw);
	extern void efx_nic_init_common(struct efx_nic *efx);
	extern void efx_nic_push_rx_indir_table(struct efx_nic *efx);

	int efx_nic_alloc_buffer(struct efx_nic efx, struct efx_buffer buffer,
	unsigned int len);
	void efx_nic_free_buffer(struct efx_nic efx, struct efx_buffer buffer);

	/* Tests */
	struct efx_nic_register_test {
	unsigned address;
	efx_oword_t mask;
	};
	extern int efx_nic_test_registers(struct efx_nic *efx,
	const struct efx_nic_register_test *regs,
	size_t n_regs);

	extern size_t efx_nic_get_regs_len(struct efx_nic *efx);
	extern void efx_nic_get_regs(struct efx_nic efx, void buf);

	/**************************************************************************
	*
	* Falcon MAC stats
	*
	**************************************************************************
	*/

	#define FALCON_STAT_OFFSET(falcon_stat) EFX_VAL(falcon_stat, offset)
	#define FALCON_STAT_WIDTH(falcon_stat) EFX_VAL(falcon_stat, WIDTH)

	/* Retrieve statistic from statistics block */
	#define FALCON_STAT(efx, falcon_stat, efx_stat) do { \
	if (FALCON_STAT_WIDTH(falcon_stat) == 16) \
	(efx)->mac_stats.efx_stat += le16_to_cpu( \
	((__force __le16 ) \
	(efx->stats_buffer.addr + \
	FALCON_STAT_OFFSET(falcon_stat)))); \
	else if (FALCON_STAT_WIDTH(falcon_stat) == 32) \
	(efx)->mac_stats.efx_stat += le32_to_cpu( \
	((__force __le32 ) \
	(efx->stats_buffer.addr + \
	FALCON_STAT_OFFSET(falcon_stat)))); \
	else \
	(efx)->mac_stats.efx_stat += le64_to_cpu( \
	((__force __le64 ) \
	(efx->stats_buffer.addr + \
	FALCON_STAT_OFFSET(falcon_stat)))); \
	} while (0)

	#define FALCON_MAC_STATS_SIZE 0x100

	#define MAC_DATA_LBN 0
	#define MAC_DATA_WIDTH 32

	extern void efx_generate_event(struct efx_nic *efx, unsigned int evq,
	efx_qword_t *event);

	extern void falcon_poll_xmac(struct efx_nic *efx);

	#endif /* EFX_NIC_H */