xref: /src/sys/dev/pci/ixgbe/ixgbe.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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/*
 * Copyright (c) 2011 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Coyote Point Systems, Inc.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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/ixgbe/ixgbe.h 244514 2012-12-20 22:26:03Z luigi $*/
/*$NetBSD: ixgbe.h,v 1.7 2015/04/24 07:00:51 msaitoh Exp $*/


#ifndef _IXGBE_H_
#define _IXGBE_H_


#include <sys/param.h>
#include <sys/reboot.h>
#include <sys/systm.h>
#include <sys/time.h>
#if __FreeBSD_version >= 800000
#include <sys/buf_ring.h>
#endif
#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/if_ether.h>
#include <net/if_dl.h>
#include <net/if_media.h>

#include <net/bpf.h>
#include <net/if_types.h>
#include <net/if_vlanvar.h>

#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>

#include <sys/bus.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/workqueue.h>
#include <sys/cpu.h>

#include "ixgbe_netbsd.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	1024
#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	1024
#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_LOOP	10

/*
 * This is the max watchdog interval, ie. the time that can
 * pass between any two TX clean operations, such only happening
 * when the TX hardware is functioning.
 */
#define IXGBE_WATCHDOG                   (10 * hz)

/*
 * 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		0xFFFF
#define IXGBE_FC_HI		0x20000
#define IXGBE_FC_LO		0x10000

/*
 * Used for optimizing small rx mbufs.  Effort is made to keep the copy
 * small and aligned for the CPU L1 cache.
 *
 * MHLEN is typically 168 bytes, giving us 8-byte alignment.  Getting
 * 32 byte alignment needed for the fast bcopy results in 8 bytes being
 * wasted.  Getting 64 byte alignment, which _should_ be ideal for
 * modern Intel CPUs, results in 40 bytes wasted and a significant drop
 * in observed efficiency of the optimization, 97.9% -> 81.8%.
 */
#define IXGBE_RX_COPY_LEN	160
#define IXGBE_RX_COPY_ALIGN	(MHLEN - IXGBE_RX_COPY_LEN)

/* Keep older OS drivers building... */
#if !defined(SYSCTL_ADD_UQUAD)
#define SYSCTL_ADD_UQUAD SYSCTL_ADD_QUAD
#endif

/* 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_82598_SCATTER		100
#define IXGBE_82599_SCATTER		32
#define MSIX_82598_BAR			3
#define MSIX_82599_BAR			4
#define IXGBE_TSO_SIZE			262140
#define IXGBE_TX_BUFFER_SIZE		((u32) 1514)
#define IXGBE_RX_HDR			128
#define IXGBE_VFTA_SIZE			128
#define IXGBE_BR_SIZE			4096
#define IXGBE_QUEUE_MIN_FREE		32

/* IOCTL define to gather SFP+ Diagnostic data */
#define SIOCGI2C	SIOCGIFGENERIC

/* Offload bits in mbuf flag */
#define	M_CSUM_OFFLOAD	\
    (M_CSUM_IPv4|M_CSUM_UDPv4|M_CSUM_TCPv4|M_CSUM_UDPv6|M_CSUM_TCPv6)

/*
 * Interrupt Moderation parameters
 */
#define IXGBE_LOW_LATENCY	128
#define IXGBE_AVE_LATENCY	400
#define IXGBE_BULK_LATENCY	1200
#define IXGBE_LINK_ITR		2000

/*
 *****************************************************************************
 * 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;

/* This is used to get SFP+ module data */
struct ixgbe_i2c_req {
        u8 dev_addr;
        u8 offset;
        u8 len;
        u8 data[8];
};

struct ixgbe_tx_buf {
	union ixgbe_adv_tx_desc	*eop;
	struct mbuf	*m_head;
	bus_dmamap_t	map;
};

struct ixgbe_rx_buf {
	struct mbuf	*buf;
	struct mbuf	*fmp;
	bus_dmamap_t	pmap;
	u_int		flags;
#define IXGBE_RX_COPY	0x01
	uint64_t	addr;
};

/*
 * Bus dma allocation structure used by ixgbe_dma_malloc and ixgbe_dma_free.
 */
struct ixgbe_dma_alloc {
	bus_addr_t		dma_paddr;
	void			*dma_vaddr;
	ixgbe_dma_tag_t		*dma_tag;
	bus_dmamap_t		dma_map;
	bus_dma_segment_t	dma_seg;
	bus_size_t		dma_size;
};

/*
** Driver queue struct: this is the interrupt container
**  for the associated tx and rx ring.
*/
struct ix_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;
	void			*que_si;
	u64			irqs;
	char			namebuf[32];
	char			evnamebuf[32];
};

/*
 * The transmit ring, one per queue
 */
struct tx_ring {
        struct adapter		*adapter;
	kmutex_t		tx_mtx;
	u32			me;
	struct timeval		watchdog_time;
	union ixgbe_adv_tx_desc	*tx_base;
	struct ixgbe_tx_buf	*tx_buffers;
	struct ixgbe_dma_alloc	txdma;
	volatile u16		tx_avail;
	u16			next_avail_desc;
	u16			next_to_clean;
	u32			process_limit;
	u16			num_desc;
	enum {
	    IXGBE_QUEUE_IDLE,
	    IXGBE_QUEUE_WORKING,
	    IXGBE_QUEUE_HUNG,
	}			queue_status;
	u32			txd_cmd;
	ixgbe_dma_tag_t		*txtag;
	char			mtx_name[16];
#ifndef IXGBE_LEGACY_TX
	struct buf_ring		*br;
	void			*txq_si;
#endif
#ifdef IXGBE_FDIR
	u16			atr_sample;
	u16			atr_count;
#endif
	u32			bytes;  /* used for AIM */
	u32			packets;
	/* Soft Stats */
	struct evcnt	   	tso_tx;
	struct evcnt	   	no_tx_map_avail;
	struct evcnt		no_desc_avail;
	struct evcnt		total_packets;
};


/*
 * The Receive ring, one per rx queue
 */
struct rx_ring {
        struct adapter		*adapter;
	kmutex_t		rx_mtx;
	u32			me;
	union ixgbe_adv_rx_desc	*rx_base;
	struct ixgbe_dma_alloc	rxdma;
#ifdef LRO
	struct lro_ctrl		lro;
#endif /* LRO */
	bool			lro_enabled;
	bool			hw_rsc;
	bool			discard;
	bool			vtag_strip;
        u16			next_to_refresh;
        u16 			next_to_check;
	u16			num_desc;
	u16			mbuf_sz;
	u32			process_limit;
	char			mtx_name[16];
	struct ixgbe_rx_buf	*rx_buffers;
	ixgbe_dma_tag_t		*ptag;

	u32			bytes; /* Used for AIM calc */
	u32			packets;

	/* Soft stats */
	struct evcnt		rx_irq;
	struct evcnt		rx_copies;
	struct evcnt		rx_packets;
	struct evcnt 		rx_bytes;
	struct evcnt 		rx_discarded;
	struct evcnt 		no_jmbuf;
	u64 			rsc_num;
#ifdef IXGBE_FDIR
	u64			flm;
#endif
};

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

	struct ixgbe_osdep	osdep;
	device_t		dev;

	struct resource		*pci_mem;
	struct resource		*msix_mem;

	/*
	 * Interrupt resources: this set is
	 * either used for legacy, or for Link
	 * when doing MSIX
	 */
	void			*tag;
	struct resource 	*res;

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

	kmutex_t		core_mtx;

	unsigned int		num_queues;

	/*
	** 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[IXGBE_VFTA_SIZE];

	/* Info about the interface */
	u32			optics;
	u32			fc; /* local flow ctrl setting */
	int			advertise;  /* link speeds */
	bool			link_active;
	u16			max_frame_size;
	u16			num_segs;
	u32			link_speed;
	bool			link_up;
	u32 			linkvec;

	/* Mbuf cluster size */
	u32			rx_mbuf_sz;

	/* Support for pluggable optics */
	bool			sfp_probe;
	void			*link_si;  /* Link tasklet */
	void			*mod_si;   /* SFP tasklet */
	void			*msf_si;   /* Multispeed Fiber */
#ifdef IXGBE_FDIR
	int			fdir_reinit;
	void			*fdir_si;
#endif

	/*
	** Queues:
	**   This is the irq holder, it has
	**   and RX/TX pair or rings associated
	**   with it.
	*/
	struct ix_queue		*queues;

	/*
	 * Transmit rings:
	 *	Allocated at run time, an array of rings.
	 */
	struct tx_ring		*tx_rings;
	u32			num_tx_desc;

	/*
	 * Receive rings:
	 *	Allocated at run time, an array of rings.
	 */
	struct rx_ring		*rx_rings;
	u64			que_mask;
	u32			num_rx_desc;

	/* Multicast array memory */
	u8			*mta;

	/* Misc stats maintained by the driver */
	struct evcnt   		dropped_pkts;
	struct evcnt   		mbuf_defrag_failed;
	struct evcnt	   	mbuf_header_failed;
	struct evcnt	   	mbuf_packet_failed;
	struct evcnt	   	efbig_tx_dma_setup;
	struct evcnt	   	efbig2_tx_dma_setup;
	struct evcnt	   	m_defrag_failed;
	struct evcnt	   	einval_tx_dma_setup;
	struct evcnt	   	other_tx_dma_setup;
	struct evcnt	   	eagain_tx_dma_setup;
	struct evcnt	   	enomem_tx_dma_setup;
	struct evcnt	   	watchdog_events;
	struct evcnt	   	tso_err;
	struct evcnt		link_irq;
	struct evcnt		morerx;
	struct evcnt		moretx;
	struct evcnt		txloops;
	struct evcnt		handleq;
	struct evcnt		req;

	struct ixgbe_hw_stats 	stats;
	struct sysctllog	*sysctllog;
	ixgbe_extmem_head_t jcl_head;
};

/* Precision Time Sync (IEEE 1588) defines */
#define ETHERTYPE_IEEE1588      0x88F7
#define PICOSECS_PER_TICK       20833
#define TSYNC_UDP_PORT          319 /* UDP port for the protocol */
#define IXGBE_ADVTXD_TSTAMP	0x00080000


#define IXGBE_CORE_LOCK_INIT(_sc, _name) \
        mutex_init(&(_sc)->core_mtx, MUTEX_DEFAULT, IPL_SOFTNET)
#define IXGBE_CORE_LOCK_DESTROY(_sc)      mutex_destroy(&(_sc)->core_mtx)
#define IXGBE_TX_LOCK_DESTROY(_sc)        mutex_destroy(&(_sc)->tx_mtx)
#define IXGBE_RX_LOCK_DESTROY(_sc)        mutex_destroy(&(_sc)->rx_mtx)
#define IXGBE_CORE_LOCK(_sc)              mutex_enter(&(_sc)->core_mtx)
#define IXGBE_TX_LOCK(_sc)                mutex_enter(&(_sc)->tx_mtx)
#define IXGBE_TX_TRYLOCK(_sc)             mutex_tryenter(&(_sc)->tx_mtx)
#define IXGBE_RX_LOCK(_sc)                mutex_enter(&(_sc)->rx_mtx)
#define IXGBE_CORE_UNLOCK(_sc)            mutex_exit(&(_sc)->core_mtx)
#define IXGBE_TX_UNLOCK(_sc)              mutex_exit(&(_sc)->tx_mtx)
#define IXGBE_RX_UNLOCK(_sc)              mutex_exit(&(_sc)->rx_mtx)
#define IXGBE_CORE_LOCK_ASSERT(_sc)       KASSERT(mutex_owned(&(_sc)->core_mtx))
#define IXGBE_TX_LOCK_ASSERT(_sc)         KASSERT(mutex_owned(&(_sc)->tx_mtx))


static inline bool
ixgbe_is_sfp(struct ixgbe_hw *hw)
{
	switch (hw->phy.type) {
	case ixgbe_phy_sfp_avago:
	case ixgbe_phy_sfp_ftl:
	case ixgbe_phy_sfp_intel:
	case ixgbe_phy_sfp_unknown:
	case ixgbe_phy_sfp_passive_tyco:
	case ixgbe_phy_sfp_passive_unknown:
		return TRUE;
	default:
		return FALSE;
	}
}

/* Workaround to make 8.0 buildable */
#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

/*
** Find the number of unrefreshed RX descriptors
*/
static inline u16
ixgbe_rx_unrefreshed(struct rx_ring *rxr)
{
	if (rxr->next_to_check > rxr->next_to_refresh)
		return (rxr->next_to_check - rxr->next_to_refresh - 1);
	else
		return ((rxr->num_desc + rxr->next_to_check) -
		    rxr->next_to_refresh - 1);
}

#endif /* _IXGBE_H_ */