dev/e1000/if_em.h

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/*$FreeBSD: head/sys/dev/em/if_em.h 164126 2006-11-09 16:00:18Z glebius $*/

#ifndef _EM_H_DEFINED_
#define _EM_H_DEFINED_

/* 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 em_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 em_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

/*
 * Inform the stack about transmit checksum offload capabilities.
 */
#define EM_CHECKSUM_FEATURES            (CSUM_TCP | CSUM_UDP)

/*
 * Inform the stack about transmit segmentation offload capabilities.
 */
#define EM_TCPSEG_FEATURES		CSUM_TSO

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

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

/*
 * 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

/*
 * EM_MASTER_SLAVE is only defined to enable a workaround for a known compatibility issue
 * with 82541/82547 devices and some switches.  See the "Known Limitations" section of
 * the README file for a complete description and a list of affected switches.
 *
 *              0 = Hardware default
 *              1 = Master mode
 *              2 = Slave mode
 *              3 = Auto master/slave
 */
/* #define EM_MASTER_SLAVE      2 */

/* Tunables -- End */

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

#define EM_VENDOR_ID                    0x8086
#define EM_FLASH			0x0014	/* Flash memory on ICH8 */

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

#define MAX_NUM_MULTICAST_ADDRESSES     128
#define PCI_ANY_ID                      (~0U)
#define ETHER_ALIGN                     2

/*
 * 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_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

/* 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 EM_RXBUFFER_2048        2048
#define EM_RXBUFFER_4096        4096
#define EM_RXBUFFER_8192        8192
#define EM_RXBUFFER_16384      16384

#define EM_MAX_SCATTER            64
#define EM_TSO_SIZE		65535

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

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
 * em_dma_malloc() and em_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;
};

/* Driver softc. */
struct adapter {
	struct ifnet	*ifp;
	struct em_hw	hw;

	/* FreeBSD operating-system-specific structures. */
	struct em_osdep osdep;
	struct device	*dev;
	struct resource *res_memory;
	struct resource *flash_mem;
	struct resource	*res_ioport;
	struct resource	*res_interrupt;
	void		*int_handler_tag;
	struct ifmedia	media;
	struct callout	timer;
	struct callout	tx_fifo_timer;
	int		watchdog_timer;
	int		io_rid;
	int		if_flags;
	struct mtx	mtx;
	int		em_insert_vlan_header;
	struct task	link_task;
	struct task	rxtx_task;
	struct taskqueue *tq;		/* private task queue */

	/* Info about the board itself */
	uint32_t	part_num;
	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;

	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 em_dma_alloc	txdma;		/* bus_dma glue for tx desc */
	struct em_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 em_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	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;

	/* 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

	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;

	struct em_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_LOCK_INIT(_sc, _name) \
	mtx_init(&(_sc)->mtx, _name, MTX_NETWORK_LOCK, MTX_DEF)
#define	EM_LOCK_DESTROY(_sc)	mtx_destroy(&(_sc)->mtx)
#define	EM_LOCK(_sc)		mtx_lock(&(_sc)->mtx)
#define	EM_UNLOCK(_sc)		mtx_unlock(&(_sc)->mtx)
#define	EM_LOCK_ASSERT(_sc)	mtx_assert(&(_sc)->mtx, MA_OWNED)

#endif /* _EM_H_DEFINED_ */