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/*$FreeBSD: release/9.1.0/sys/dev/ixgbe/ixv.h 235528 2012-05-17 00:06:54Z jfv $*/


#ifndef _IXV_H_
#define _IXV_H_


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

#include <net/if.h>
#include <net/if_arp.h>
#include <net/bpf.h>
#include <net/ethernet.h>
#include <net/if_dl.h>
#include <net/if_media.h>

#include <net/bpf.h>
#include <net/if_types.h>
#include <net/if_vlan_var.h>

#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/tcp_lro.h>
#include <netinet/udp.h>

#include <machine/in_cksum.h>

#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/clock.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <sys/endian.h>
#include <sys/taskqueue.h>
#include <sys/pcpu.h>
#include <sys/smp.h>
#include <machine/smp.h>

#include "ixgbe_api.h"
#include "ixgbe_vf.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	1024
#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	1024
#define PERFORM_RXD	2048
#define MAX_RXD		4096
#define MIN_RXD		64

/* Alignment for rings */
#define DBA_ALIGN	128

/*
 * This parameter controls the maximum no of times the driver will loop in
 * the isr. Minimum Value = 1
 */
#define MAX_LOOP	10

/*
 * This is the max watchdog interval, ie. the time that can
 * pass between any two TX clean operations, such only happening
 * when the TX hardware is functioning.
 */
#define IXV_WATCHDOG                   (10 * hz)

/*
 * This parameters control when the driver calls the routine to reclaim
 * transmit descriptors.
 */
#define IXV_TX_CLEANUP_THRESHOLD	(adapter->num_tx_desc / 8)
#define IXV_TX_OP_THRESHOLD		(adapter->num_tx_desc / 32)

#define IXV_MAX_FRAME_SIZE	0x3F00

/* Flow control constants */
#define IXV_FC_PAUSE		0xFFFF
#define IXV_FC_HI		0x20000
#define IXV_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 IXV_EITR_DEFAULT		128
#define IXV_SCATTER			32
#define IXV_RX_HDR			128
#define MSIX_BAR			3
#define IXV_TSO_SIZE			65535
#define IXV_BR_SIZE			4096
#define IXV_LINK_ITR			2000
#define TX_BUFFER_SIZE		((u32) 1514)
#define VFTA_SIZE			128

/* Offload bits in mbuf flag */
#if __FreeBSD_version >= 800000
#define CSUM_OFFLOAD		(CSUM_IP|CSUM_TCP|CSUM_UDP|CSUM_SCTP)
#else
#define CSUM_OFFLOAD		(CSUM_IP|CSUM_TCP|CSUM_UDP)
#endif

/*
 *****************************************************************************
 * vendor_info_array
 * 
 * This array contains the list of Subvendor/Subdevice IDs on which the driver
 * should load.
 * 
 *****************************************************************************
 */
typedef struct _ixv_vendor_info_t {
	unsigned int    vendor_id;
	unsigned int    device_id;
	unsigned int    subvendor_id;
	unsigned int    subdevice_id;
	unsigned int    index;
} ixv_vendor_info_t;


struct ixv_tx_buf {
	u32		eop_index;
	struct mbuf	*m_head;
	bus_dmamap_t	map;
};

struct ixv_rx_buf {
	struct mbuf	*m_head;
	struct mbuf	*m_pack;
	struct mbuf	*fmp;
	bus_dmamap_t	hmap;
	bus_dmamap_t	pmap;
};

/*
 * Bus dma allocation structure used by ixv_dma_malloc and ixv_dma_free.
 */
struct ixv_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;
};

/*
** Driver queue struct: this is the interrupt container
**  for the associated tx and rx ring.
*/
struct ix_queue {
	struct adapter		*adapter;
	u32			msix;           /* This queue's MSIX vector */
	u32			eims;           /* This queue's EIMS bit */
	u32			eitr_setting;
	u32			eitr;		/* cached reg */
	struct resource		*res;
	void			*tag;
	struct tx_ring		*txr;
	struct rx_ring		*rxr;
	struct task		que_task;
	struct taskqueue	*tq;
	u64			irqs;
};

/*
 * The transmit ring, one per queue
 */
struct tx_ring {
        struct adapter		*adapter;
	struct mtx		tx_mtx;
	u32			me;
	bool			watchdog_check;
	int			watchdog_time;
	union ixgbe_adv_tx_desc	*tx_base;
	struct ixv_dma_alloc	txdma;
	u32			next_avail_desc;
	u32			next_to_clean;
	struct ixv_tx_buf	*tx_buffers;
	volatile u16		tx_avail;
	u32			txd_cmd;
	bus_dma_tag_t		txtag;
	char			mtx_name[16];
	struct buf_ring		*br;
	/* Soft Stats */
	u32			bytes;
	u32			packets;
	u64			no_desc_avail;
	u64			total_packets;
};


/*
 * The Receive ring, one per rx queue
 */
struct rx_ring {
        struct adapter		*adapter;
	struct mtx		rx_mtx;
	u32			me;
	union ixgbe_adv_rx_desc	*rx_base;
	struct ixv_dma_alloc	rxdma;
	struct lro_ctrl		lro;
	bool			lro_enabled;
	bool			hdr_split;
	bool			discard;
        u32			next_to_refresh;
        u32 			next_to_check;
	char			mtx_name[16];
	struct ixv_rx_buf	*rx_buffers;
	bus_dma_tag_t		htag;
	bus_dma_tag_t		ptag;

	u32			bytes; /* Used for AIM calc */
	u32			packets;

	/* Soft stats */
	u64			rx_irq;
	u64			rx_split_packets;
	u64			rx_packets;
	u64 			rx_bytes;
	u64 			rx_discarded;
};

/* Our adapter structure */
struct adapter {
	struct ifnet		*ifp;
	struct ixgbe_hw		hw;

	struct ixgbe_osdep	osdep;
	struct device		*dev;

	struct resource		*pci_mem;
	struct resource		*msix_mem;

	/*
	 * Interrupt resources: this set is
	 * either used for legacy, or for Link
	 * when doing MSIX
	 */
	void			*tag;
	struct resource 	*res;

	struct ifmedia		media;
	struct callout		timer;
	int			msix;
	int			if_flags;

	struct mtx		core_mtx;

	eventhandler_tag 	vlan_attach;
	eventhandler_tag 	vlan_detach;

	u16			num_vlans;
	u16			num_queues;

	/* Info about the board itself */
	bool			link_active;
	u16			max_frame_size;
	u32			link_speed;
	bool			link_up;
	u32 			mbxvec;

	/* Mbuf cluster size */
	u32			rx_mbuf_sz;

	/* Support for pluggable optics */
	struct task     	mbx_task;  /* Mailbox tasklet */
	struct taskqueue	*tq;

	/*
	** 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;
	int			num_rx_desc;
	u64			que_mask;
	u32			rx_process_limit;

	/* Misc stats maintained by the driver */
	unsigned long   	dropped_pkts;
	unsigned long   	mbuf_defrag_failed;
	unsigned long   	mbuf_header_failed;
	unsigned long   	mbuf_packet_failed;
	unsigned long   	no_tx_map_avail;
	unsigned long   	no_tx_dma_setup;
	unsigned long   	watchdog_events;
	unsigned long   	tso_tx;
	unsigned long		mbx_irq;

	struct ixgbevf_hw_stats	stats;
};


#define IXV_CORE_LOCK_INIT(_sc, _name) \
        mtx_init(&(_sc)->core_mtx, _name, "IXV Core Lock", MTX_DEF)
#define IXV_CORE_LOCK_DESTROY(_sc)      mtx_destroy(&(_sc)->core_mtx)
#define IXV_TX_LOCK_DESTROY(_sc)        mtx_destroy(&(_sc)->tx_mtx)
#define IXV_RX_LOCK_DESTROY(_sc)        mtx_destroy(&(_sc)->rx_mtx)
#define IXV_CORE_LOCK(_sc)              mtx_lock(&(_sc)->core_mtx)
#define IXV_TX_LOCK(_sc)                mtx_lock(&(_sc)->tx_mtx)
#define IXV_TX_TRYLOCK(_sc)             mtx_trylock(&(_sc)->tx_mtx)
#define IXV_RX_LOCK(_sc)                mtx_lock(&(_sc)->rx_mtx)
#define IXV_CORE_UNLOCK(_sc)            mtx_unlock(&(_sc)->core_mtx)
#define IXV_TX_UNLOCK(_sc)              mtx_unlock(&(_sc)->tx_mtx)
#define IXV_RX_UNLOCK(_sc)              mtx_unlock(&(_sc)->rx_mtx)
#define IXV_CORE_LOCK_ASSERT(_sc)       mtx_assert(&(_sc)->core_mtx, MA_OWNED)
#define IXV_TX_LOCK_ASSERT(_sc)         mtx_assert(&(_sc)->tx_mtx, MA_OWNED)

/* Workaround to make 8.0 buildable */
#if __FreeBSD_version >= 800000 && __FreeBSD_version < 800504
static __inline int
drbr_needs_enqueue(struct ifnet *ifp, struct buf_ring *br)
{
#ifdef ALTQ
        if (ALTQ_IS_ENABLED(&ifp->if_snd))
                return (1);
#endif
        return (!buf_ring_empty(br));
}
#endif

/*
** Find the number of unrefreshed RX descriptors
*/
static inline u16
ixv_rx_unrefreshed(struct rx_ring *rxr)
{       
	struct adapter  *adapter = rxr->adapter;
        
	if (rxr->next_to_check > rxr->next_to_refresh)
		return (rxr->next_to_check - rxr->next_to_refresh - 1);
	else
		return ((adapter->num_rx_desc + rxr->next_to_check) -
		    rxr->next_to_refresh - 1);
}       

#endif /* _IXV_H_ */