/*	$OpenBSD: if_ix.h,v 1.27 2014/11/12 16:06:47 mikeb Exp $	*/

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/*$FreeBSD: src/sys/dev/ixgbe/ixgbe.h,v 1.38 2012/12/20 22:29:29 svnexp Exp $*/

#ifndef _IX_H_
#define _IX_H_

#include <dev/pci/ixgbe.h>

/* Tunables */

/*
 * TxDescriptors Valid Range: 64-4096 Default Value: 256 This value is the
 * number of transmit descriptors allocated by the driver. Increasing this
 * value allows the driver to queue more transmits. Each descriptor is 16
 * bytes. Performance tests have show the 2K value to be optimal for top
 * performance.
 */
#define DEFAULT_TXD	256
#define PERFORM_TXD	2048
#define MAX_TXD		4096
#define MIN_TXD		64

/*
 * RxDescriptors Valid Range: 64-4096 Default Value: 256 This value is the
 * number of receive descriptors allocated for each RX queue. Increasing this
 * value allows the driver to buffer more incoming packets. Each descriptor
 * is 16 bytes.  A receive buffer is also allocated for each descriptor.
 *
 * Note: with 8 rings and a dual port card, it is possible to bump up
 *	against the system mbuf pool limit, you can tune nmbclusters
 *	to adjust for this.
 */
#define DEFAULT_RXD	256
#define PERFORM_RXD	2048
#define MAX_RXD		4096
#define MIN_RXD		64

/* Alignment for rings */
#define DBA_ALIGN	128

/*
 * This parameter controls the duration of transmit watchdog timer.
 */
#define IXGBE_TX_TIMEOUT                   5	/* set to 5 seconds */

/*
 * This parameters control when the driver calls the routine to reclaim
 * transmit descriptors.
 */
#define IXGBE_TX_CLEANUP_THRESHOLD	(sc->num_tx_desc / 16)
#define IXGBE_TX_OP_THRESHOLD		(sc->num_tx_desc / 32)

#define IXGBE_MAX_FRAME_SIZE	9216

/* Flow control constants */
#define IXGBE_FC_PAUSE		0xFFFF
#define IXGBE_FC_HI		0x20000
#define IXGBE_FC_LO		0x10000

/* Defines for printing debug information */
#define DEBUG_INIT  0
#define DEBUG_IOCTL 0
#define DEBUG_HW    0

#define INIT_DEBUGOUT(S)            if (DEBUG_INIT)  printf(S "\n")
#define INIT_DEBUGOUT1(S, A)        if (DEBUG_INIT)  printf(S "\n", A)
#define INIT_DEBUGOUT2(S, A, B)     if (DEBUG_INIT)  printf(S "\n", A, B)
#define IOCTL_DEBUGOUT(S)           if (DEBUG_IOCTL) printf(S "\n")
#define IOCTL_DEBUGOUT1(S, A)       if (DEBUG_IOCTL) printf(S "\n", A)
#define IOCTL_DEBUGOUT2(S, A, B)    if (DEBUG_IOCTL) printf(S "\n", A, B)
#define HW_DEBUGOUT(S)              if (DEBUG_HW) printf(S "\n")
#define HW_DEBUGOUT1(S, A)          if (DEBUG_HW) printf(S "\n", A)
#define HW_DEBUGOUT2(S, A, B)       if (DEBUG_HW) printf(S "\n", A, B)

#define MAX_NUM_MULTICAST_ADDRESSES     128
#define IXGBE_82598_SCATTER		100
#define IXGBE_82599_SCATTER		32
#define MSIX_82598_BAR			3
#define MSIX_82599_BAR			4
#define IXGBE_TSO_SIZE			262140
#define IXGBE_TX_BUFFER_SIZE		((uint32_t) 1514)
#define IXGBE_RX_HDR			128
#define IXGBE_VFTA_SIZE			128
#define IXGBE_BR_SIZE			4096
#define IXGBE_QUEUE_MIN_FREE		32

/*
 * Interrupt Moderation parameters
 */
#define IXGBE_INTS_PER_SEC		8000

struct ixgbe_tx_buf {
	uint32_t		eop_index;
	struct mbuf		*m_head;
	bus_dmamap_t		map;
};

struct ixgbe_rx_buf {
	struct mbuf		*buf;
	struct mbuf		*fmp;
	bus_dmamap_t		map;
};

/*
 * Bus dma allocation structure used by ixgbe_dma_malloc and ixgbe_dma_free.
 */
struct ixgbe_dma_alloc {
	caddr_t			dma_vaddr;
	bus_dma_tag_t		dma_tag;
	bus_dmamap_t		dma_map;
	bus_dma_segment_t	dma_seg;
	bus_size_t		dma_size;
	int			dma_nseg;
};

/*
 * Driver queue struct: this is the interrupt container
 *  for the associated tx and rx ring.
 */
struct ix_queue {
	struct ix_softc         *sc;
	uint32_t		msix;           /* This queue's MSIX vector */
	uint32_t		eims;           /* This queue's EIMS bit */
	uint32_t		eitr_setting;
	void			*tag;
	struct tx_ring		*txr;
	struct rx_ring		*rxr;
};

/*
 * The transmit ring, one per tx queue
 */
struct tx_ring {
	struct ix_softc		*sc;
	uint32_t		me;
	uint32_t		watchdog_timer;
	union ixgbe_adv_tx_desc	*tx_base;
	struct ixgbe_tx_buf	*tx_buffers;
	struct ixgbe_dma_alloc	txdma;
	volatile uint16_t	tx_avail;
	uint32_t		next_avail_desc;
	uint32_t		next_to_clean;
	enum {
	    IXGBE_QUEUE_IDLE,
	    IXGBE_QUEUE_WORKING,
	    IXGBE_QUEUE_HUNG,
	}			queue_status;
	uint32_t		txd_cmd;
	bus_dma_tag_t		txtag;
	uint32_t		bytes; /* Used for AIM calc */
	uint32_t		packets;
	/* Soft Stats */
	uint64_t		tx_packets;
};


/*
 * The Receive ring, one per rx queue
 */
struct rx_ring {
	struct ix_softc		*sc;
	uint32_t		me;
	union ixgbe_adv_rx_desc	*rx_base;
	struct ixgbe_dma_alloc	rxdma;
#if 0
	struct lro_ctrl		lro;
#endif
	bool			lro_enabled;
	bool			hw_rsc;
	bool			discard;
	uint			next_to_refresh;
	uint			next_to_check;
	uint			last_desc_filled;
	struct if_rxring	rx_ring;
	struct ixgbe_rx_buf	*rx_buffers;

	uint32_t		bytes; /* Used for AIM calc */
	uint32_t		packets;

	/* Soft stats */
	uint64_t		rx_irq;
	uint64_t		rx_packets;
	uint64_t		rx_bytes;
	uint64_t		rx_discarded;
	uint64_t		rsc_num;
};

/* Our adapter structure */
struct ix_softc {
	struct device		dev;
	struct arpcom		arpcom;

	struct ixgbe_hw		hw;
	struct ixgbe_osdep	osdep;

	void			*tag;

	struct ifmedia		media;
	struct timeout		timer;
	struct timeout		rx_refill;
	int			msix;
	int			if_flags;

	uint16_t		num_vlans;
	uint16_t		num_queues;

	/*
	 * Shadow VFTA table, this is needed because
	 * the real vlan filter table gets cleared during
	 * a soft reset and the driver needs to be able
	 * to repopulate it.
	 */
	uint32_t		shadow_vfta[IXGBE_VFTA_SIZE];

	/* Info about the interface */
	uint			optics;
	uint32_t		fc; /* local flow ctrl setting */
	int			advertise;  /* link speeds */
	uint16_t		max_frame_size;
	uint16_t		num_segs;
	uint32_t		link_speed;
	bool			link_up;
	uint32_t		linkvec;

	/* Mbuf cluster size */
	uint32_t		rx_mbuf_sz;

	/*
	 * Queues:
	 *   This is the irq holder, it has
	 *   and RX/TX pair or rings associated
	 *   with it.
	 */
	struct ix_queue		*queues;

	/*
	 * Transmit rings:
	 *	Allocated at run time, an array of rings.
	 */
	struct tx_ring		*tx_rings;
	int			num_tx_desc;

	/*
	 * Receive rings:
	 *	Allocated at run time, an array of rings.
	 */
	struct rx_ring		*rx_rings;
	uint64_t		que_mask;
	int			num_rx_desc;

	/* Multicast array memory */
	uint8_t			*mta;

	/* Misc stats maintained by the driver */
	unsigned long		dropped_pkts;
	unsigned long		no_tx_map_avail;
	unsigned long		no_tx_dma_setup;
	unsigned long		watchdog_events;
	unsigned long		tso_tx;
	unsigned long		link_irq;

	struct ixgbe_hw_stats 	stats;
};

#endif /* _IX_H_ */
