path: root/sys/dev/ixgbe/ixgbe.h

/******************************************************************************

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  All rights reserved.
  
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  modification, are permitted provided that the following conditions are met:
  
   1. Redistributions of source code must retain the above copyright notice, 
      this list of conditions and the following disclaimer.
  
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      contributors may be used to endorse or promote products derived from 
      this software without specific prior written permission.
  
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  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
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******************************************************************************/
/*$FreeBSD$*/

#ifndef _IXGBE_H_
#define _IXGBE_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 "ixgbe_api.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 maximum no of times the driver will loop in
 * the isr. Minimum Value = 1
 */
#define MAX_INTR	10

/*
 * 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	(adapter->num_tx_desc / 8)
#define IXGBE_TX_OP_THRESHOLD		(adapter->num_tx_desc / 32)

#define IXGBE_MAX_FRAME_SIZE	0x3F00

/* Flow control constants */
#define IXGBE_FC_PAUSE		0x680
#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_MAX_SCATTER		100
#define IXGBE_MSIX_BAR			3
#define IXGBE_TSO_SIZE			65535
#define IXGBE_TX_BUFFER_SIZE		((u32) 1514)
#define IXGBE_RX_HDR_SIZE		((u32) 256)
#define CSUM_OFFLOAD			7	/* Bits in csum flags */

/* The number of MSIX messages the 82598 supports */
#define IXGBE_MSGS			18

/* For 6.X code compatibility */
#if __FreeBSD_version < 700000
#define ETHER_BPF_MTAP		BPF_MTAP
#define CSUM_TSO		0
#define IFCAP_TSO4		0
#define FILTER_STRAY
#define FILTER_HANDLED
#endif

/*
 * Interrupt Moderation parameters 
 * 	for now we hardcode, later
 *	it would be nice to do dynamic
 */
#define MAX_IRQ_SEC	8000
#define DEFAULT_ITR	1000000000/(MAX_IRQ_SEC * 256)
#define LINK_ITR	1000000000/(1950 * 256)

/* Used for auto RX queue configuration */
extern int mp_ncpus;

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


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

struct ixgbe_rx_buf {
	struct mbuf	*m_head;
	boolean_t	bigbuf;
	/* one small and one large map */
	bus_dmamap_t	map[2];
};

/*
 * Bus dma allocation structure used by ixgbe_dma_malloc and ixgbe_dma_free.
 */
struct ixgbe_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;
};

/*
 * The transmit ring, one per tx queue
 */
struct tx_ring {
        struct adapter		*adapter;
	struct mtx		tx_mtx;
	u32			me;
	u32			msix;
	u32			eims;
	u32			watchdog_timer;
	union ixgbe_adv_tx_desc	*tx_base;
	volatile u32		tx_hwb;
	struct ixgbe_dma_alloc	txdma;
	struct task     	tx_task;
	struct taskqueue	*tq;
	u32			next_avail_tx_desc;
	u32			next_tx_to_clean;
	struct ixgbe_tx_buf	*tx_buffers;
	volatile u16		tx_avail;
	u32			txd_cmd;
	bus_dma_tag_t		txtag;
	/* Soft Stats */
	u32			no_tx_desc_avail;
	u32			no_tx_desc_late;
	u64			tx_irq;
	u64			tx_packets;
};


/*
 * The Receive ring, one per rx queue
 */
struct rx_ring {
        struct adapter		*adapter;
	struct mtx		rx_mtx;
	u32			me;
	u32			msix;
	u32			eims;
	u32			payload;
	struct task     	rx_task;
	struct taskqueue	*tq;
	union ixgbe_adv_rx_desc	*rx_base;
	struct ixgbe_dma_alloc	rxdma;
	struct lro_ctrl		lro;
        unsigned int		last_cleaned;
        unsigned int		next_to_check;
	struct ixgbe_rx_buf	*rx_buffers;
	bus_dma_tag_t		rxtag[2];
	bus_dmamap_t		spare_map[2];
	struct mbuf		*fmp;
	struct mbuf		*lmp;
	/* Soft stats */
	u64			rx_irq;
	u64			packet_count;
	u64 			byte_count;
};

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

	/* FreeBSD operating-system-specific structures */
	struct ixgbe_osdep	osdep;
	struct device	*dev;

	struct resource	*pci_mem;
	struct resource	*msix_mem;

	/*
	 * Interrupt resources:
	 *  Oplin has 20 MSIX messages
	 *  so allocate that for now.
	 */
	void		*tag[IXGBE_MSGS];
	struct resource *res[IXGBE_MSGS];
	int		rid[IXGBE_MSGS];
	u32		eims_mask;

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

	struct mtx	core_mtx;

	/* Legacy Fast Intr handling */
	struct task     link_task;
	
	/* Info about the board itself */
	u32		part_num;
	bool		link_active;
	u16		max_frame_size;
	u32		link_speed;
	u32		tx_int_delay;
	u32		tx_abs_int_delay;
	u32		rx_int_delay;
	u32		rx_abs_int_delay;

	/* Indicates the cluster size to use */
	bool		bigbufs;

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

	/*
	 * Receive rings:
	 *	Allocated at run time, an array of rings.
	 */
	struct rx_ring	*rx_rings;
	int		num_rx_desc;
	int		num_rx_queues;
	u32		rx_process_limit;

	eventhandler_tag	vlan_attach;
	eventhandler_tag	vlan_detach;

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

	struct ixgbe_hw_stats stats;
};

#define IXGBE_CORE_LOCK_INIT(_sc, _name) \
        mtx_init(&(_sc)->core_mtx, _name, "IXGBE Core Lock", MTX_DEF)
#define IXGBE_CORE_LOCK_DESTROY(_sc)      mtx_destroy(&(_sc)->core_mtx)
#define IXGBE_TX_LOCK_DESTROY(_sc)                mtx_destroy(&(_sc)->tx_mtx)
#define IXGBE_RX_LOCK_DESTROY(_sc)                mtx_destroy(&(_sc)->rx_mtx)
#define IXGBE_CORE_LOCK(_sc)              mtx_lock(&(_sc)->core_mtx)
#define IXGBE_TX_LOCK(_sc)                        mtx_lock(&(_sc)->tx_mtx)
#define IXGBE_RX_LOCK(_sc)                        mtx_lock(&(_sc)->rx_mtx)
#define IXGBE_CORE_UNLOCK(_sc)            mtx_unlock(&(_sc)->core_mtx)
#define IXGBE_TX_UNLOCK(_sc)              mtx_unlock(&(_sc)->tx_mtx)
#define IXGBE_RX_UNLOCK(_sc)              mtx_unlock(&(_sc)->rx_mtx)
#define IXGBE_CORE_LOCK_ASSERT(_sc)       mtx_assert(&(_sc)->core_mtx, MA_OWNED)
#define IXGBE_TX_LOCK_ASSERT(_sc)         mtx_assert(&(_sc)->tx_mtx, MA_OWNED)


#endif /* _IXGBE_H_ */