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/* $NetBSD: midwayvar.h,v 1.10 1997/03/20 21:34:46 chuck Exp $ */
/*
*
* Copyright (c) 1996 Charles D. Cranor and Washington University.
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles D. Cranor and
* Washington University.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* $FreeBSD$
*/
/*
* m i d w a y v a r . h
*
* we define the en_softc here so that bus specific modules can allocate
* it as the first item in their softc.
*
* author: Chuck Cranor <chuck@ccrc.wustl.edu>
*/
/*
* params needed to determine softc size
*/
#ifndef EN_NTX
#define EN_NTX 8 /* number of tx bufs to use */
#endif
#ifndef EN_TXSZ
#define EN_TXSZ 32 /* trasmit buf size in KB */
#endif
#ifndef EN_RXSZ
#define EN_RXSZ 32 /* recv buf size in KB */
#endif
/* largest possible NRX (depends on RAM size) */
#define EN_MAXNRX ((2048 - (EN_NTX * EN_TXSZ)) / EN_RXSZ)
#ifndef EN_MAX_DMASEG
#define EN_MAX_DMASEG 32
#endif
/* number of bytes to use in the first receive buffer. This must not be larger
* than MHLEN, should be a multiple of 64 and must be a multiple of 4. */
#define EN_RX1BUF 128
/*
* Structure to hold DMA maps. These are handle via a typestable uma zone.
*/
struct en_map {
uintptr_t flags; /* map flags */
struct en_map *rsvd2; /* see uma_zalloc(9) */
struct en_softc *sc; /* back pointer */
bus_dmamap_t map; /* the map */
};
#define ENMAP_LOADED 0x02
#define ENMAP_ALLOC 0x01
#define EN_MAX_MAPS 400
/*
* Statistics
*/
struct en_stats {
uint32_t vtrash; /* sw copy of counter */
uint32_t otrash; /* sw copy of counter */
uint32_t ttrash; /* # of RBD's with T bit set */
uint32_t mfixaddr; /* # of times we had to mfix an address */
uint32_t mfixlen; /* # of times we had to mfix a lenght*/
uint32_t mfixfail; /* # of times mfix failed */
uint32_t txmbovr; /* # of times we dropped due to mbsize */
uint32_t dmaovr; /* tx dma overflow count */
uint32_t txoutspace; /* out of space in xmit buffer */
uint32_t txdtqout; /* out of DTQs */
uint32_t launch; /* total # of launches */
uint32_t hwpull; /* # of pulls off hardware service list */
uint32_t swadd; /* # of pushes on sw service list */
uint32_t rxqnotus; /* # of times we pull from rx q, but fail */
uint32_t rxqus; /* # of good pulls from rx q */
uint32_t rxdrqout; /* # of times out of DRQs */
uint32_t rxmbufout; /* # of time out of mbufs */
uint32_t txnomap; /* out of DMA maps in TX */
};
/*
* Each of these structures describes one of the eight transmit channels
*/
struct en_txslot {
uint32_t mbsize; /* # mbuf bytes in use (max=TXHIWAT) */
uint32_t bfree; /* # free bytes in buffer */
uint32_t start; /* start of buffer area (byte offset) */
uint32_t stop; /* ends of buffer area (byte offset) */
uint32_t cur; /* next free area (byte offset) */
uint32_t nref; /* # of VCs using this channel */
struct ifqueue q; /* mbufs waiting for DMA now */
struct ifqueue indma; /* mbufs waiting for DMA now */
};
/*
* Each of these structures is used for each of the receive buffers on the
* card.
*/
struct en_rxslot {
uint32_t mode; /* saved copy of mode info */
uint32_t start; /* begin of my buffer area */
uint32_t stop; /* end of my buffer area */
uint32_t cur; /* where I am at in the buffer */
struct en_vcc *vcc; /* backpointer to VCI */
struct ifqueue q; /* mbufs waiting for dma now */
struct ifqueue indma; /* mbufs being dma'd now */
};
struct en_vcc {
struct atmio_vcc vcc; /* required by common code */
void *rxhand;
uint vflags;
uint32_t ipackets;
uint32_t opackets;
uint32_t ibytes;
uint32_t obytes;
uint8_t txspeed;
struct en_txslot *txslot; /* transmit slot */
struct en_rxslot *rxslot; /* receive slot */
};
#define VCC_DRAIN 0x0001 /* closed, but draining rx */
#define VCC_SWSL 0x0002 /* on rx software service list */
#define VCC_CLOSE_RX 0x0004 /* currently closing */
#define VCC_ASYNC 0x0008 /* async close */
/*
* softc
*/
struct en_softc {
/* bsd glue */
struct ifatm ifatm; /* ATM network ifnet handle */
device_t dev;
/* bus glue */
bus_space_tag_t en_memt; /* for EN_READ/EN_WRITE */
bus_space_handle_t en_base; /* base of en card */
bus_size_t en_obmemsz; /* size of en card (bytes) */
void (*en_busreset)(void *); /* bus specific reset function */
bus_dma_tag_t txtag; /* TX DMA tag */
/* serv list */
uint32_t hwslistp; /* hw pointer to service list (byte offset) */
uint16_t swslist[MID_SL_N]; /* software svc list (see en_service()) */
uint16_t swsl_head; /* ends of swslist (index into swslist) */
uint16_t swsl_tail;
uint32_t swsl_size; /* # of items in swsl */
/* xmit dma */
uint32_t dtq[MID_DTQ_N];/* sw copy of dma q (see EN_DQ_MK macros) */
uint32_t dtq_free; /* # of dtq's free */
uint32_t dtq_us; /* software copy of our pointer (byte offset) */
uint32_t dtq_chip; /* chip's pointer (byte offset) */
uint32_t need_dtqs; /* true if we ran out of DTQs */
/* recv dma */
uint32_t drq[MID_DRQ_N];/* sw copy of dma q (see ENIDQ macros) */
uint32_t drq_free; /* # of drq's free */
uint32_t drq_us; /* software copy of our pointer (byte offset) */
uint32_t drq_chip; /* chip's pointer (byte offset) */
uint32_t need_drqs; /* true if we ran out of DRQs */
/* xmit buf ctrl. (per channel) */
struct en_txslot txslot[MID_NTX_CH];
/* recv buf ctrl. (per recv slot) */
struct en_rxslot rxslot[EN_MAXNRX];
int en_nrx; /* # of active rx slots */
/* vccs */
struct en_vcc **vccs;
u_int vccs_open;
struct cv cv_close; /* close CV */
/* stats */
struct en_stats stats;
/* random stuff */
uint32_t ipl; /* sbus interrupt lvl (1 on pci?) */
uint8_t bestburstcode; /* code of best burst we can use */
uint8_t bestburstlen; /* length of best burst (bytes) */
uint8_t bestburstshift; /* (x >> shift) == (x / bestburstlen) */
uint8_t bestburstmask; /* bits to check if not multiple of burst */
uint8_t alburst; /* align dma bursts? */
uint8_t noalbursts; /* don't use unaligned > 4 byte bursts */
uint8_t is_adaptec; /* adaptec version of midway? */
struct mbuf *padbuf; /* buffer of zeros for TX padding */
/* mutex to protect this structure and the associated hardware */
struct mtx en_mtx;
/* sysctl support */
struct sysctl_ctx_list sysctl_ctx;
struct sysctl_oid *sysctl_tree;
/* memory zones */
uma_zone_t map_zone;
/* media and phy */
struct ifmedia media;
struct utopia utopia;
#ifdef EN_DEBUG
/* debugging */
u_int debug;
#endif
};
/*
* exported functions
*/
int en_attach(struct en_softc *);
void en_destroy(struct en_softc *);
void en_intr(void *);
void en_reset(struct en_softc *);
int en_modevent(module_t, int, void *arg);
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