dev/e1000/if_em.h

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

Copyright (c) 2001-2007, Intel Corporation
All rights reserved.

Redistribution and use in source and binary forms, with or without
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.

 2. Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.

 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.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

***************************************************************************/
/*$FreeBSD: head/sys/dev/em/if_em.h 173788 2007-11-20 21:41:22Z jfv $*/

#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 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 ETH_ZLEN		60
#define ETH_ADDR_LEN		6
#define CSUM_OFFLOAD		7	/* Offload bits in mbuf flag */

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;
	struct e1000_hw	hw;

	/* FreeBSD operating-system-specific structures. */
	struct e1000_osdep osdep;
	struct device	*dev;
	struct resource *res_memory;
	struct resource *flash_mem;
	struct resource *msix_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		msi;
	int		if_flags;
	int		max_frame_size;
	int		min_frame_size;
	struct mtx	core_mtx;
	struct mtx	tx_mtx;
	int		em_insert_vlan_header;
	struct task     link_task;
	struct task     rxtx_task;
	struct taskqueue *tq;           /* private task queue */
	/* 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 */

	/*
	 * Transmit function pointer:
	 *      legacy or advanced (82575 and later)
	 */
	int (*em_xmit) (struct adapter *adapter, struct mbuf **m_headp);

	/*
	 * 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;

	/* 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 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, MTX_NETWORK_LOCK, MTX_DEF)
#define	EM_TX_LOCK_INIT(_sc, _name) \
	mtx_init(&(_sc)->tx_mtx, _name, MTX_NETWORK_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_CORE_LOCK(_sc)		mtx_lock(&(_sc)->core_mtx)
#define	EM_TX_LOCK(_sc)			mtx_lock(&(_sc)->tx_mtx)
#define	EM_CORE_UNLOCK(_sc)		mtx_unlock(&(_sc)->core_mtx)
#define	EM_TX_UNLOCK(_sc)		mtx_unlock(&(_sc)->tx_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)

#endif /* _EM_H_DEFINED_ */