dev/e1000/if_em.h

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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,
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   2. Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
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   3. Neither the name of the Intel Corporation nor the names of its
      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: head/sys/dev/e1000/if_em.h 191038 2009-04-14 03:36:59Z kmacy $*/


#ifndef _EM_H_DEFINED_
#define _EM_H_DEFINED_

#define	IFNET_BUF_RING
/* Tunables */

/*
 * EM_TXD: Maximum number of Transmit Descriptors
 * Valid Range: 80-256 for 82542 and 82543-based adapters
 *              80-4096 for others
 * 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.
 *   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 EM_MIN_TXD		80
#define EM_MAX_TXD_82543	256
#define EM_MAX_TXD		4096
#define EM_DEFAULT_TXD		EM_MAX_TXD_82543

/*
 * EM_RXD - Maximum number of receive Descriptors
 * Valid Range: 80-256 for 82542 and 82543-based adapters
 *              80-4096 for others
 * Default Value: 256
 *   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 EM_MIN_RXD		80
#define EM_MAX_RXD_82543	256
#define EM_MAX_RXD		4096
#define EM_DEFAULT_RXD	EM_MAX_RXD_82543

/*
 * EM_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 EM_TIDV                         64

/*
 * EM_TADV - Transmit Absolute Interrupt Delay Value
 * (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
 *   transmit interrupt is generated. Useful only if EM_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 EM_TIDV, may improve traffic throughput in specific
 *   network conditions.
 */
#define EM_TADV                         64

/*
 * EM_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 EM_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 EM_RDTR is set to 0.
 */
#define EM_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 EM_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 EM_RDTR, may improve traffic throughput in specific network
 *   conditions.
 */
#define EM_RADV                         64

/*
 * This parameter controls the duration of transmit watchdog timer.
 */
#define EM_TX_TIMEOUT                   5

/*
 * This parameter controls when the driver calls the routine to reclaim
 * transmit descriptors.
 */
#define EM_TX_CLEANUP_THRESHOLD	(adapter->num_tx_desc / 8)
#define EM_TX_OP_THRESHOLD	(adapter->num_tx_desc / 32)

/*
 * 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 EM_MASTER_SLAVE		e1000_ms_hw_default

/*
 * Micellaneous constants
 */
#define EM_VENDOR_ID                    0x8086
#define EM_FLASH                        0x0014

#define EM_JUMBO_PBA                    0x00000028
#define EM_DEFAULT_PBA                  0x00000030
#define EM_SMARTSPEED_DOWNSHIFT         3
#define EM_SMARTSPEED_MAX               15
#define EM_MAX_INTR			10

#define MAX_NUM_MULTICAST_ADDRESSES     128
#define PCI_ANY_ID                      (~0U)
#define ETHER_ALIGN                     2
#define EM_FC_PAUSE_TIME		0x0680
#define EM_EEPROM_APME			0x400;

/* Code compatilbility between 6 and 7 */
#ifndef ETHER_BPF_MTAP
#define ETHER_BPF_MTAP			BPF_MTAP
#endif

/*
 * 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 EM_DBA_ALIGN			128

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

/* PCI Config defines */
#define EM_BAR_TYPE(v)		((v) & EM_BAR_TYPE_MASK)
#define EM_BAR_TYPE_MASK	0x00000001
#define EM_BAR_TYPE_MMEM	0x00000000
#define EM_BAR_TYPE_IO		0x00000001
#define EM_BAR_TYPE_FLASH	0x0014
#define EM_BAR_MEM_TYPE(v)	((v) & EM_BAR_MEM_TYPE_MASK)
#define EM_BAR_MEM_TYPE_MASK	0x00000006
#define EM_BAR_MEM_TYPE_32BIT	0x00000000
#define EM_BAR_MEM_TYPE_64BIT	0x00000004
#define EM_MSIX_BAR		3	/* On 82575 */

/* 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 EM_MAX_SCATTER		64
#define EM_TSO_SIZE		(65535 + sizeof(struct ether_vlan_header))
#define EM_TSO_SEG_SIZE		4096	/* Max dma segment size */
#define EM_MSIX_MASK		0x01F00000 /* For 82574 use */
#define ETH_ZLEN		60
#define ETH_ADDR_LEN		6
#define CSUM_OFFLOAD		7	/* Offload bits in mbuf flag */

/*
 * 82574 has a nonstandard address for EIAC
 * and since its only used in MSIX, and in
 * the em driver only 82574 uses MSIX we can
 * solve it just using this define.
 */
#define EM_EIAC 0x000DC

/* Used in for 82547 10Mb Half workaround */
#define EM_PBA_BYTES_SHIFT	0xA
#define EM_TX_HEAD_ADDR_SHIFT	7
#define EM_PBA_TX_MASK		0xFFFF0000
#define EM_FIFO_HDR		0x10
#define EM_82547_PKT_THRESH	0x3e0

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

/* TIMESYNC IOCTL defines */
#define EM_TIMESYNC_READTS	_IOWR('i', 127, struct em_tsync_read)

/* Used in the READTS IOCTL */
struct em_tsync_read {
	int read_current_time;
	struct timespec	system_time;
	u64 network_time;
	u64 rx_stamp;
	u64 tx_stamp;
	u16 seqid;
	unsigned char srcid[6];
	int rx_valid;
	int tx_valid;
};

#endif /* EM_TIMESYNC */

struct adapter;

struct em_int_delay_info {
	struct adapter *adapter;	/* Back-pointer to the adapter struct */
	int offset;			/* Register offset to read/write */
	int value;			/* Current value in usecs */
};

/*
 * Bus dma allocation structure used by
 * e1000_dma_malloc and e1000_dma_free.
 */
struct em_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;
};

/* Our adapter structure */
struct adapter {
	struct ifnet	*ifp;
#ifdef IFNET_BUF_RING
	struct buf_ring	*br;
#endif
	struct e1000_hw	hw;

	/* FreeBSD operating-system-specific structures. */
	struct e1000_osdep osdep;
	struct device	*dev;

	struct resource *memory;
	struct resource *flash;
	struct resource *msix;

	struct resource	*ioport;
	int		io_rid;

	/* 82574 uses 3 int vectors */
	struct resource	*res[3];
	void		*tag[3];
	int		rid[3];

	struct ifmedia	media;
	struct callout	timer;
	struct callout	tx_fifo_timer;
	int		watchdog_timer;
	int		msi;
	int		if_flags;
	int		max_frame_size;
	int		min_frame_size;
	struct mtx	core_mtx;
	struct mtx	tx_mtx;
	struct mtx	rx_mtx;
	int		em_insert_vlan_header;

	/* Task for FAST handling */
	struct task     link_task;
	struct task     rxtx_task;
	struct task     rx_task;
	struct task     tx_task;
	struct taskqueue *tq;           /* private task queue */

	eventhandler_tag vlan_attach;
	eventhandler_tag vlan_detach;

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

	/* Info about the board itself */
	uint8_t		link_active;
	uint16_t	link_speed;
	uint16_t	link_duplex;
	uint32_t	smartspeed;
	struct em_int_delay_info tx_int_delay;
	struct em_int_delay_info tx_abs_int_delay;
	struct em_int_delay_info rx_int_delay;
	struct em_int_delay_info rx_abs_int_delay;

	/*
	 * 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 em_dma_alloc	txdma;		/* bus_dma glue for tx desc */
	struct e1000_tx_desc	*tx_desc_base;
	uint32_t		next_avail_tx_desc;
	uint32_t		next_tx_to_clean;
	volatile uint16_t	num_tx_desc_avail;
        uint16_t		num_tx_desc;
        uint32_t		txd_cmd;
	struct em_buffer	*tx_buffer_area;
	bus_dma_tag_t		txtag;		/* dma tag for tx */
	uint32_t	   	tx_tso;		/* last tx was tso */

	/*
	 * 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 em_dma_alloc	rxdma;		/* bus_dma glue for rx desc */
	struct e1000_rx_desc	*rx_desc_base;
	uint32_t		next_rx_desc_to_check;
	uint32_t		rx_buffer_len;
	uint16_t		num_rx_desc;
	int			rx_process_limit;
	struct em_buffer	*rx_buffer_area;
	bus_dma_tag_t		rxtag;
	bus_dmamap_t		rx_sparemap;

	/*
	 * 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;
	unsigned long	rx_overruns;
	unsigned long	rx_irq;
	unsigned long	tx_irq;
	unsigned long	link_irq;

	/* 82547 workaround */
	uint32_t	tx_fifo_size;
	uint32_t	tx_fifo_head;
	uint32_t	tx_fifo_head_addr;
	uint64_t	tx_fifo_reset_cnt;
	uint64_t	tx_fifo_wrk_cnt;
	uint32_t	tx_head_addr;

        /* For 82544 PCIX Workaround */
	boolean_t       pcix_82544;
	boolean_t       in_detach;

#ifdef EM_TIMESYNC
	u64		last_stamp;
	u64		last_sec;
	u32		last_ns;
#endif

	struct e1000_hw_stats stats;
};

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


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

/* For 82544 PCIX  Workaround */
typedef struct _ADDRESS_LENGTH_PAIR
{
	uint64_t   address;
	uint32_t   length;
} ADDRESS_LENGTH_PAIR, *PADDRESS_LENGTH_PAIR;

typedef struct _DESCRIPTOR_PAIR
{
	ADDRESS_LENGTH_PAIR descriptor[4];
	uint32_t   elements;
} DESC_ARRAY, *PDESC_ARRAY;

#define	EM_CORE_LOCK_INIT(_sc, _name) \
	mtx_init(&(_sc)->core_mtx, _name, "EM Core Lock", MTX_DEF)
#define	EM_TX_LOCK_INIT(_sc, _name) \
	mtx_init(&(_sc)->tx_mtx, _name, "EM TX Lock", MTX_DEF)
#define	EM_RX_LOCK_INIT(_sc, _name) \
	mtx_init(&(_sc)->rx_mtx, _name, "EM RX Lock", MTX_DEF)
#define	EM_CORE_LOCK_DESTROY(_sc)	mtx_destroy(&(_sc)->core_mtx)
#define	EM_TX_LOCK_DESTROY(_sc)		mtx_destroy(&(_sc)->tx_mtx)
#define	EM_RX_LOCK_DESTROY(_sc)		mtx_destroy(&(_sc)->rx_mtx)
#define	EM_CORE_LOCK(_sc)		mtx_lock(&(_sc)->core_mtx)
#define	EM_TX_LOCK(_sc)			mtx_lock(&(_sc)->tx_mtx)
#define	EM_TX_TRYLOCK(_sc)		mtx_trylock(&(_sc)->tx_mtx)
#define	EM_RX_LOCK(_sc)			mtx_lock(&(_sc)->rx_mtx)
#define	EM_CORE_UNLOCK(_sc)		mtx_unlock(&(_sc)->core_mtx)
#define	EM_TX_UNLOCK(_sc)		mtx_unlock(&(_sc)->tx_mtx)
#define	EM_RX_UNLOCK(_sc)		mtx_unlock(&(_sc)->rx_mtx)
#define	EM_CORE_LOCK_ASSERT(_sc)	mtx_assert(&(_sc)->core_mtx, MA_OWNED)
#define	EM_TX_LOCK_ASSERT(_sc)		mtx_assert(&(_sc)->tx_mtx, MA_OWNED)

#ifdef IFNET_BUF_RING
#define ADAPTER_RING_EMPTY(adapter) drbr_empty((adapter)->ifp, (adapter)->br)
#else
#define ADAPTER_RING_EMPTY(adapter) IFQ_DRV_IS_EMPTY(&((adapter)->ifp->if_snd))
#endif
#endif /* _EM_H_DEFINED_ */