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/* $OpenBSD: if_ixgb.h,v 1.11 2009/08/10 19:41:05 deraadt Exp $ */

#ifndef _IXGB_H_DEFINED_
#define _IXGB_H_DEFINED_

#include "bpfilter.h"
#include "vlan.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/socket.h>

#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>

#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_ether.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#endif

#if NVLAN > 0
#include <net/if_types.h>
#include <net/if_vlan_var.h>
#endif

#if NBPFILTER > 0
#include <net/bpf.h>
#endif

#include <uvm/uvm_extern.h>

#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>

#include <dev/pci/ixgb_hw.h>
#include <dev/pci/ixgb_ee.h>
#include <dev/pci/ixgb_ids.h>

/* Tunables */

/*
 * TxDescriptors Valid Range: 64-4096 Default Value: 2048 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.
 */
#define IXGB_MAX_TXD			2048

/*
 * RxDescriptors Valid Range: 64-4096 Default Value: 1024 This value is the
 * number of receive descriptors allocated by the driver. 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. The
 * maximum MTU size is 16110.
 */
#define IXGB_MAX_RXD			1024

/*
 * TxIntDelay Valid Range: 0-65535 (0=off) Default Value: 32 This value
 * delays the generation of transmit interrupts in units of 1.024
 * microseconds. Transmit interrupt reduction can improve CPU efficiency if
 * properly tuned for specific network traffic. If the system is reporting
 * dropped transmits, this value may be set too high causing the driver to
 * run out of available transmit descriptors.
 */
#define TIDV				32

/*
 * RxIntDelay Valid Range: 0-65535 (0=off) Default Value: 72 This value
 * delays the generation of receive interrupts in units of 1.024
 * microseconds.  Receive interrupt reduction can improve CPU efficiency if
 * properly tuned for specific network traffic. Increasing this value adds
 * extra latency to frame reception and can end up decreasing the throughput
 * of TCP traffic. If the system is reporting dropped receives, this value
 * may be set too high, causing the driver to run out of available receive
 * descriptors.
 */
#define RDTR				72

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

/*
 * This parameter controls when the driver calls the routine to reclaim
 * transmit descriptors.
 */
#define IXGB_TX_CLEANUP_THRESHOLD	(sc->num_tx_desc / 8)

/* 
 * Flow Control Types. 
 * 1. ixgb_fc_none - Flow Control Disabled 
 * 2. ixgb_fc_rx_pause - Flow Control Receive Only
 * 3. ixgb_fc_tx_pause - Flow Control Transmit Only
 * 4. ixgb_fc_full - Flow Control Enabled
 */
#define FLOW_CONTROL_NONE	ixgb_fc_none 
#define FLOW_CONTROL_RX_PAUSE	ixgb_fc_rx_pause
#define FLOW_CONTROL_TX_PAUSE	ixgb_fc_tx_pause
#define FLOW_CONTROL_FULL	ixgb_fc_full

/*
 * Set the flow control type. Assign one of the above flow control types to be enabled.
 * Default Value: FLOW_CONTROL_FULL   
 */    
#define FLOW_CONTROL		FLOW_CONTROL_FULL

/*
 * Receive Flow control low threshold (when we send a resume frame) (FCRTL)
 * Valid Range: 64 - 262,136 (0x40 - 0x3FFF8, 8 byte granularity) must be
 * less than high threshold by at least 8 bytes Default Value:  163,840
 * (0x28000)
 */
#define FCRTL			0x28000

/*
 * Receive Flow control high threshold (when we send a pause frame) (FCRTH)
 * Valid Range: 1,536 - 262,136 (0x600 - 0x3FFF8, 8 byte granularity) Default
 * Value: 196,608 (0x30000)
 */
#define FCRTH			0x30000

/*
 * Flow control request timeout (how long to pause the link partner's tx)
 * (PAP 15:0) Valid Range: 1 - 65535 Default Value:  256 (0x100)
 */
#define FCPAUSE			0x100

/* Tunables -- End */

#define IXGB_MMBA		0x0010	/* Mem base address */
#define IXGB_ROUNDUP(size, unit) (((size) + (unit) - 1) & ~((unit) - 1))

#define MAX_NUM_MULTICAST_ADDRESSES	128

/* 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)

/* Supported RX Buffer Sizes */
#define IXGB_RXBUFFER_2048	2048
#define IXGB_RXBUFFER_4096	4096
#define IXGB_RXBUFFER_8192	8192
#define IXGB_RXBUFFER_16384	16384

#define IXGB_MAX_SCATTER	100

struct ixgb_buffer {
	struct mbuf    *m_head;
	bus_dmamap_t    map;	/* bus_dma map for packet */
};

/*
 * Bus dma allocation structure used by
 * ixgb_dma_malloc and ixgb_dma_free.
 */
struct ixgb_dma_alloc {
	bus_addr_t		dma_paddr;
	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;
};

typedef enum _XSUM_CONTEXT_T {
	OFFLOAD_NONE,
	OFFLOAD_TCP_IP,
	OFFLOAD_UDP_IP
} XSUM_CONTEXT_T;

/* Our adapter structure */
struct ixgb_softc {
	struct device	sc_dv;
	struct arpcom	interface_data;
	struct ixgb_hw	hw;

	/* OpenBSD operating-system-specific structures */
	struct ixgb_osdep osdep;
	struct ifmedia	media;
	int		io_rid;

	void		*sc_intrhand;
	struct timeout	ixgb_intr_enable;
	struct timeout	timer_handle;
	int		if_flags;
	void		*sc_powerhook;

	/* Info about the board itself */
	u_int32_t	part_num;
	u_int8_t	link_active;
	u_int16_t	link_speed;
	u_int16_t	link_duplex;
	u_int32_t	tx_int_delay;
	u_int32_t	tx_abs_int_delay;
	u_int32_t	rx_int_delay;
	u_int32_t	rx_abs_int_delay;

	int		raidc;

	XSUM_CONTEXT_T	active_checksum_context;

	/*
	 * Transmit definitions
	 * 
	 * We have an array of num_tx_desc descriptors (handled by the
	 * controller) paired with an array of tx_buffers (at
	 * tx_buffer_area). The index of the next available descriptor is
	 * next_avail_tx_desc. The number of remaining tx_desc is
	 * num_tx_desc_avail.
	 */
	struct ixgb_dma_alloc	txdma;		/* bus_dma glue for tx desc */
	struct ixgb_tx_desc	*tx_desc_base;
	u_int32_t		next_avail_tx_desc;
	u_int32_t		oldest_used_tx_desc;
	volatile u_int16_t	num_tx_desc_avail;
	u_int16_t		num_tx_desc;
	u_int32_t		txd_cmd;
	struct ixgb_buffer	*tx_buffer_area;
	bus_dma_tag_t		txtag;		/* dma tag for tx */

	/*
	 * Receive definitions
	 * 
	 * we have an array of num_rx_desc rx_desc (handled by the controller),
	 * and paired with an array of rx_buffers (at rx_buffer_area). The
	 * next pair to check on receive is at offset next_rx_desc_to_check
	 */
	struct ixgb_dma_alloc	rxdma;		/* bus_dma glue for rx desc */
	struct ixgb_rx_desc	*rx_desc_base;
	u_int32_t		next_rx_desc_to_check;
	u_int16_t		num_rx_desc;
	u_int32_t		rx_buffer_len;
	struct ixgb_buffer	*rx_buffer_area;
	bus_dma_tag_t		rxtag;		/* dma tag for Rx */
	u_int32_t		next_rx_desc_to_use;

	/*
	 * First/last mbuf pointers, for
	 * collecting multisegment RX packets.
	 */
	struct mbuf		*fmp;
	struct mbuf		*lmp;

	/* Misc stats maintained by the driver */
	unsigned long		dropped_pkts;
	unsigned long		mbuf_alloc_failed;
	unsigned long		mbuf_cluster_failed;
	unsigned long		no_tx_desc_avail1;
	unsigned long		no_tx_desc_avail2;
	unsigned long		no_tx_map_avail;
	unsigned long		no_tx_dma_setup;
	unsigned long		watchdog_events;

	struct ixgb_hw_stats	stats;
};

#endif /* _IXGB_H_DEFINED_ */
