freebsd-dev/sys/dev/e1000/if_igb.h

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

  Copyright (c) 2001-2011, Intel Corporation 
  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 _IGB_H_DEFINED_
#define _IGB_H_DEFINED_

/* Tunables */

/*
 * IGB_TXD: Maximum number of Transmit Descriptors
 *
 *   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.
 *   Since TDLEN should be multiple of 128bytes, the number of transmit
 *   desscriptors should meet the following condition.
 *      (num_tx_desc * sizeof(struct e1000_tx_desc)) % 128 == 0
 */
#define IGB_MIN_TXD		256
#define IGB_DEFAULT_TXD		1024
#define IGB_MAX_TXD		4096

/*
 * IGB_RXD: Maximum number of Receive Descriptors
 *
 *   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.
 *   Since TDLEN should be multiple of 128bytes, the number of transmit
 *   desscriptors should meet the following condition.
 *      (num_tx_desc * sizeof(struct e1000_tx_desc)) % 128 == 0
 */
#define IGB_MIN_RXD		256
#define IGB_DEFAULT_RXD		1024
#define IGB_MAX_RXD		4096

/*
 * IGB_TIDV - Transmit Interrupt Delay Value
 * Valid Range: 0-65535 (0=off)
 * Default Value: 64
 *   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 IGB_TIDV                         64

/*
 * IGB_TADV - Transmit Absolute Interrupt Delay Value
 * Valid Range: 0-65535 (0=off)
 * Default Value: 64
 *   This value, in units of 1.024 microseconds, limits the delay in which a
 *   transmit interrupt is generated. Useful only if IGB_TIDV is non-zero,
 *   this value ensures that an interrupt is generated after the initial
 *   packet is sent on the wire within the set amount of time.  Proper tuning,
 *   along with IGB_TIDV, may improve traffic throughput in specific
 *   network conditions.
 */
#define IGB_TADV                         64

/*
 * IGB_RDTR - Receive Interrupt Delay Timer (Packet Timer)
 * Valid Range: 0-65535 (0=off)
 * Default Value: 0
 *   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.
 *
 *   CAUTION: When setting IGB_RDTR to a value other than 0, adapters
 *            may hang (stop transmitting) under certain network conditions.
 *            If this occurs a WATCHDOG message is logged in the system
 *            event log. In addition, the controller is automatically reset,
 *            restoring the network connection. To eliminate the potential
 *            for the hang ensure that IGB_RDTR is set to 0.
 */
#define IGB_RDTR                         0

/*
 * Receive Interrupt Absolute Delay Timer (Not valid for 82542/82543/82544)
 * Valid Range: 0-65535 (0=off)
 * Default Value: 64
 *   This value, in units of 1.024 microseconds, limits the delay in which a
 *   receive interrupt is generated. Useful only if IGB_RDTR is non-zero,
 *   this value ensures that an interrupt is generated after the initial
 *   packet is received within the set amount of time.  Proper tuning,
 *   along with IGB_RDTR, may improve traffic throughput in specific network
 *   conditions.
 */
#define IGB_RADV                         64

/*
 * This parameter controls the duration of transmit watchdog timer.
 */
#define IGB_WATCHDOG                   (10 * hz)

/*
 * This parameter controls when the driver calls the routine to reclaim
 * transmit descriptors. Cleaning earlier seems a win.
 */
#define IGB_TX_CLEANUP_THRESHOLD	(adapter->num_tx_desc / 2)

/*
 * This parameter controls whether or not autonegotation is enabled.
 *              0 - Disable autonegotiation
 *              1 - Enable  autonegotiation
 */
#define DO_AUTO_NEG                     1

/*
 * This parameter control whether or not the driver will wait for
 * autonegotiation to complete.
 *              1 - Wait for autonegotiation to complete
 *              0 - Don't wait for autonegotiation to complete
 */
#define WAIT_FOR_AUTO_NEG_DEFAULT       0

/* Tunables -- End */

#define AUTONEG_ADV_DEFAULT	(ADVERTISE_10_HALF | ADVERTISE_10_FULL | \
				ADVERTISE_100_HALF | ADVERTISE_100_FULL | \
				ADVERTISE_1000_FULL)

#define AUTO_ALL_MODES		0

/* PHY master/slave setting */
#define IGB_MASTER_SLAVE		e1000_ms_hw_default

/*
 * Micellaneous constants
 */
#define IGB_VENDOR_ID			0x8086

#define IGB_JUMBO_PBA			0x00000028
#define IGB_DEFAULT_PBA			0x00000030
#define IGB_SMARTSPEED_DOWNSHIFT	3
#define IGB_SMARTSPEED_MAX		15
#define IGB_MAX_LOOP			10

#define IGB_RX_PTHRESH			(hw->mac.type <= e1000_82576 ? 16 : 8)
#define IGB_RX_HTHRESH			8
#define IGB_RX_WTHRESH			1

#define IGB_TX_PTHRESH			8
#define IGB_TX_HTHRESH			1
#define IGB_TX_WTHRESH			((hw->mac.type != e1000_82575 && \
                                          adapter->msix_mem) ? 1 : 16)

#define MAX_NUM_MULTICAST_ADDRESSES     128
#define PCI_ANY_ID                      (~0U)
#define ETHER_ALIGN                     2
#define IGB_TX_BUFFER_SIZE		((uint32_t) 1514)
#define IGB_FC_PAUSE_TIME		0x0680
#define IGB_EEPROM_APME			0x400;
/* Queue minimum free for use */
#define IGB_QUEUE_THRESHOLD		(adapter->num_tx_desc / 8)
/* Queue bit defines */
#define IGB_QUEUE_IDLE			1
#define IGB_QUEUE_WORKING		2
#define IGB_QUEUE_HUNG			4
#define IGB_QUEUE_DEPLETED		8

/*
 * TDBA/RDBA should be aligned on 16 byte boundary. But TDLEN/RDLEN should be
 * multiple of 128 bytes. So we align TDBA/RDBA on 128 byte boundary. This will
 * also optimize cache line size effect. H/W supports up to cache line size 128.
 */
#define IGB_DBA_ALIGN			128

#define SPEED_MODE_BIT (1<<21)		/* On PCI-E MACs only */

/* PCI Config defines */
#define IGB_MSIX_BAR		3

/* 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 IGB_MAX_SCATTER		64
#define IGB_VFTA_SIZE		128
#define IGB_BR_SIZE		4096	/* ring buf size */
#define IGB_TSO_SIZE		(65535 + sizeof(struct ether_vlan_header))
#define IGB_TSO_SEG_SIZE	4096	/* Max dma segment size */
#define IGB_HDR_BUF		128
#define IGB_PKTTYPE_MASK	0x0000FFF0
#define ETH_ZLEN		60
#define ETH_ADDR_LEN		6

/* 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

/* Define the starting Interrupt rate per Queue */
#define IGB_INTS_PER_SEC        8000
#define IGB_DEFAULT_ITR         ((1000000/IGB_INTS_PER_SEC) << 2)

#define IGB_LINK_ITR            2000

/* Precision Time Sync (IEEE 1588) defines */
#define ETHERTYPE_IEEE1588	0x88F7
#define PICOSECS_PER_TICK	20833
#define TSYNC_PORT		319 /* UDP port for the protocol */

/*
 * Bus dma allocation structure used by
 * e1000_dma_malloc and e1000_dma_free.
 */
struct igb_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;
        int                     dma_nseg;
};


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

/*
 * Transmit ring: one per queue
 */
struct tx_ring {
	struct adapter		*adapter;
	u32			me;
	struct mtx		tx_mtx;
	char			mtx_name[16];
	struct igb_dma_alloc	txdma;
	struct e1000_tx_desc	*tx_base;
	u32			next_avail_desc;
	u32			next_to_clean;
	volatile u16		tx_avail;
	struct igb_tx_buffer	*tx_buffers;
#if __FreeBSD_version >= 800000
	struct buf_ring		*br;
#endif
	bus_dma_tag_t		txtag;
	struct task		txq_task;

	u32			bytes;
	u32			packets;

	int			queue_status;
	int			watchdog_time;
	int			tdt;
	int			tdh;
	u64			no_desc_avail;
	u64			tx_packets;
};

/*
 * Receive ring: one per queue
 */
struct rx_ring {
	struct adapter		*adapter;
	u32			me;
	struct igb_dma_alloc	rxdma;
	union e1000_adv_rx_desc	*rx_base;
	struct lro_ctrl		lro;
	bool			lro_enabled;
	bool			hdr_split;
	bool			discard;
	struct mtx		rx_mtx;
	char			mtx_name[16];
	u32			next_to_refresh;
	u32			next_to_check;
	struct igb_rx_buf	*rx_buffers;
	bus_dma_tag_t		htag;		/* dma tag for rx head */
	bus_dma_tag_t		ptag;		/* dma tag for rx packet */
	/*
	 * First/last mbuf pointers, for
	 * collecting multisegment RX packets.
	 */
	struct mbuf	       *fmp;
	struct mbuf	       *lmp;

	u32			bytes;
	u32			packets;
	int			rdt;
	int			rdh;

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

struct adapter {
	struct ifnet	*ifp;
	struct e1000_hw	hw;

	struct e1000_osdep osdep;
	struct device	*dev;
	struct cdev	*led_dev;

	struct resource *pci_mem;
	struct resource *msix_mem;
	struct resource	*res;
	void		*tag;
	u32		que_mask;

	int		linkvec;
	int		link_mask;
	struct task	link_task;
	int		link_irq;

	struct ifmedia	media;
	struct callout	timer;
	int		msix;	/* total vectors allocated */
	int		if_flags;
	int		max_frame_size;
	int		min_frame_size;
	int		pause_frames;
	struct mtx	core_mtx;
	int		igb_insert_vlan_header;
        u16		num_queues;
	u16		vf_ifp;  /* a VF interface */

	eventhandler_tag vlan_attach;
	eventhandler_tag vlan_detach;
	u32		num_vlans;

	/* Management and WOL features */
	int		wol;
	int		has_manage;

	/*
	** 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.
	*/
	u32		shadow_vfta[IGB_VFTA_SIZE];

	/* Info about the interface */
	u16		link_active;
	u16		fc;
	u16		link_speed;
	u16		link_duplex;
	u32		smartspeed;
	u32		dmac;
	int		enable_aim;

	/* Interface queues */
	struct igb_queue	*queues;

	/*
	 * Transmit rings
	 */
	struct tx_ring		*tx_rings;
        u16			num_tx_desc;

	/* Multicast array pointer */
	u8			*mta;

	/* 
	 * Receive rings
	 */
	struct rx_ring		*rx_rings;
	bool			rx_hdr_split;
        u16			num_rx_desc;
	int			rx_process_limit;
	u32			rx_mbuf_sz;
	u32			rx_mask;

	/* 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	rx_overruns;
	unsigned long	device_control;
	unsigned long	rx_control;
	unsigned long	int_mask;
	unsigned long	eint_mask;
	unsigned long	packet_buf_alloc_rx;
	unsigned long	packet_buf_alloc_tx;

	boolean_t       in_detach;

#ifdef IGB_IEEE1588
	/* IEEE 1588 precision time support */
	struct cyclecounter     cycles;
	struct nettimer         clock;
	struct nettime_compare  compare;
	struct hwtstamp_ctrl    hwtstamp;
#endif

	void 			*stats;
};

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


struct igb_tx_buffer {
	int		next_eop;  /* Index of the desc to watch */
        struct mbuf    *m_head;
        bus_dmamap_t    map;         /* bus_dma map for packet */
};

struct igb_rx_buf {
        struct mbuf    *m_head;
        struct mbuf    *m_pack;
	bus_dmamap_t	hmap;	/* bus_dma map for header */
	bus_dmamap_t	pmap;	/* bus_dma map for packet */
};

/*
** Find the number of unrefreshed RX descriptors
*/
static inline u16
igb_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);
}

#define	IGB_CORE_LOCK_INIT(_sc, _name) \
	mtx_init(&(_sc)->core_mtx, _name, "IGB Core Lock", MTX_DEF)
#define	IGB_CORE_LOCK_DESTROY(_sc)	mtx_destroy(&(_sc)->core_mtx)
#define	IGB_CORE_LOCK(_sc)		mtx_lock(&(_sc)->core_mtx)
#define	IGB_CORE_UNLOCK(_sc)		mtx_unlock(&(_sc)->core_mtx)
#define	IGB_CORE_LOCK_ASSERT(_sc)	mtx_assert(&(_sc)->core_mtx, MA_OWNED)

#define	IGB_TX_LOCK_DESTROY(_sc)	mtx_destroy(&(_sc)->tx_mtx)
#define	IGB_TX_LOCK(_sc)		mtx_lock(&(_sc)->tx_mtx)
#define	IGB_TX_UNLOCK(_sc)		mtx_unlock(&(_sc)->tx_mtx)
#define	IGB_TX_TRYLOCK(_sc)		mtx_trylock(&(_sc)->tx_mtx)
#define	IGB_TX_LOCK_ASSERT(_sc)		mtx_assert(&(_sc)->tx_mtx, MA_OWNED)

#define	IGB_RX_LOCK_DESTROY(_sc)	mtx_destroy(&(_sc)->rx_mtx)
#define	IGB_RX_LOCK(_sc)		mtx_lock(&(_sc)->rx_mtx)
#define	IGB_RX_UNLOCK(_sc)		mtx_unlock(&(_sc)->rx_mtx)
#define	IGB_RX_LOCK_ASSERT(_sc)		mtx_assert(&(_sc)->rx_mtx, MA_OWNED)

#define UPDATE_VF_REG(reg, last, cur)		\
{						\
	u32 new = E1000_READ_REG(hw, reg);	\
	if (new < last)				\
		cur += 0x100000000LL;		\
	last = new;				\
	cur &= 0xFFFFFFFF00000000LL;		\
	cur |= new;				\
}

#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

#endif /* _IGB_H_DEFINED_ */