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/* $OpenBSD: if_snvar.h,v 1.2 1997/03/14 14:11:36 briggs Exp $ */
/*
* Copyright (c) 1991 Algorithmics Ltd (http://www.algor.co.uk)
* You may use, copy, and modify this program so long as you retain the
* copyright line.
*/
/*
* if_sonic.h -- National Semiconductor DP83932BVF (SONIC)
*/
/*
* Memory access macros. Since we handle SONIC in 16 bit mode (PB5X0)
* and 32 bit mode (everything else) using a single GENERIC kernel
* binary, all structures have to be accessed using macros which can
* adjust the offsets appropriately.
*/
#define SWO(m, a, o, x) (m ? (*(u_int32_t *)((u_int32_t *)a + o) = (x)) : \
(*(u_int16_t *)((u_int16_t *)a + o) = (x)))
#define SRO(m, a, o) (m ? (*(u_int32_t *)((u_int32_t *)a + o) & 0xffff) : \
(*(u_int16_t *)((u_int16_t *)a + o) & 0xffff))
/*
* buffer sizes in 32 bit mode
* 1 TXpkt is 4 hdr words + (3 * FRAGMAX) + 1 link word
* FRAGMAX == 16 => 54 words == 216 bytes
*
* 1 RxPkt is 7 words == 28 bytes
* 1 Rda is 4 words == 16 bytes
*/
#define NRBA 16 /* # receive buffers < NRRA */
#define RBAMASK 0x0f
#define NRDA NRBA
#define NTDA 4 /* # transmit descriptors */
#define NRRA 32 /* # receive resource descriptors */
#define RRAMASK 0x1f /* the reason why it must be power of two */
#define FCSSIZE 4 /* size of FCS appended to packets */
/*
* maximum receive packet size plus 2 byte pad to make each
* one aligned. 4 byte slop (required for eobc)
*/
#define RBASIZE(sc) (sizeof(struct ether_header) + ETHERMTU + FCSSIZE + \
((sc)->bitmode ? 6 : 2))
/*
* transmit buffer area
*/
#define NTXB 10 /* Number of xmit buffers */
#define TXBSIZE 1536 /* 6*2^8 -- the same size as the 8390 TXBUF */
/*
* Statistics collected over time
*/
struct sn_stats {
int ls_opacks; /* packets transmitted */
int ls_ipacks; /* packets received */
int ls_tdr; /* contents of tdr after collision */
int ls_tdef; /* packets where had to wait */
int ls_tone; /* packets with one retry */
int ls_tmore; /* packets with more than one retry */
int ls_tbuff; /* transmit buff errors */
int ls_tuflo; /* " uflo " */
int ls_tlcol;
int ls_tlcar;
int ls_trtry;
int ls_rbuff; /* receive buff errors */
int ls_rfram; /* framing */
int ls_roflo; /* overflow */
int ls_rcrc;
int ls_rrng; /* rx ring sequence error */
int ls_babl; /* chip babl error */
int ls_cerr; /* collision error */
int ls_miss; /* missed packet */
int ls_merr; /* memory error */
int ls_copies; /* copies due to out of range mbufs */
int ls_maxmbufs; /* max mbufs on transmit */
int ls_maxslots; /* max ring slots on transmit */
};
typedef struct mtd {
void *mtd_txp;
int mtd_vtxp;
unsigned char *mtd_buf;
} mtd_t;
/*
* The sn_softc for Mac68k if_sn.
*/
typedef struct sn_softc {
struct device sc_dev;
struct arpcom sc_arpcom;
#define sc_if sc_arpcom.ac_if /* network visible interface */
#define sc_enaddr sc_arpcom.ac_enaddr /* hardware ethernet address */
bus_space_tag_t sc_regt;
bus_space_handle_t sc_regh;
struct sn_stats sc_sum;
short sc_iflags;
unsigned short bitmode; /* 32 bit mode == 1, 16 == 0 */
unsigned int s_dcr; /* DCR for this instance */
int slotno; /* Slot number */
struct sonic_reg *sc_csr; /* hardware pointer */
int sc_rxmark; /* pos. in rx ring for reading buffs */
int sc_rramark; /* index into p_rra of wp */
void *p_rra[NRRA]; /* RX resource descs */
int v_rra[NRRA]; /* DMA addresses of p_rra */
int v_rea; /* ptr to the end of the rra space */
int sc_rdamark;
void *p_rda[NRDA];
int v_rda[NRDA];
caddr_t rbuf[NRBA];
int sc_txhead; /*XXX idx of first TDA passed to chip */
int sc_missed; /* missed packet counter */
int txb_cnt; /* total number of xmit buffers */
int txb_inuse; /* number of active xmit buffers */
int txb_new; /* index of next open slot. */
struct mtd mtda[NTDA];
int mtd_hw; /* idx of first mtd given to hw */
int mtd_prev; /* idx of last mtd given to hardware */
int mtd_free; /* next free mtd to use */
int mtd_tlinko; /*
* offset of tlink of last txp given
* to SONIC. Need to clear EOL on
* this word to add a desc.
*/
caddr_t tbuf[NTXB];
int vtbuf[NTXB]; /* DMA address of tbuf */
void *p_cda;
int v_cda;
unsigned char space[(1 + 1 + 8 + 5) * NBPG];
} sn_softc_t;
/*
* Accessing SONIC data structures and registers as 32 bit values
* makes code endianess independent. The SONIC is however always in
* bigendian mode so it is necessary to ensure that data structures shared
* between the CPU and the SONIC are always in bigendian order.
*/
/*
* Receive Resource Descriptor
* This structure describes the buffers into which packets
* will be received. Note that more than one packet may be
* packed into a single buffer if constraints permit.
*/
#define RXRSRC_PTRLO 0 /* buffer address LO */
#define RXRSRC_PTRHI 1 /* buffer address HI */
#define RXRSRC_WCLO 2 /* buffer size (16bit words) LO */
#define RXRSRC_WCHI 3 /* buffer size (16bit words) HI */
#define RXRSRC_SIZE(sc) (sc->bitmode ? (4 * 4) : (4 * 2))
/*
* Receive Descriptor
* This structure holds information about packets received.
*/
#define RXPKT_STATUS 0
#define RXPKT_BYTEC 1
#define RXPKT_PTRLO 2
#define RXPKT_PTRHI 3
#define RXPKT_SEQNO 4
#define RXPKT_RLINK 5
#define RXPKT_INUSE 6
#define RXPKT_SIZE(sc) (sc->bitmode ? (7 * 4) : (7 * 2))
#define RBASEQ(x) (((x)>>8)&0xff)
#define PSNSEQ(x) ((x) & 0xff)
/*
* Transmit Descriptor
* This structure holds information about packets to be transmitted.
*/
#define FRAGMAX 16 /* maximum number of fragments in a packet */
#define TXP_STATUS 0 /* + transmitted packet status */
#define TXP_CONFIG 1 /* transmission configuration */
#define TXP_PKTSIZE 2 /* entire packet size in bytes */
#define TXP_FRAGCNT 3 /* # fragments in packet */
#define TXP_FRAGOFF 4 /* offset to first fragment */
#define TXP_FRAGSIZE 3 /* size of each fragment desc */
#define TXP_FPTRLO 0 /* ptr to packet fragment LO */
#define TXP_FPTRHI 1 /* ptr to packet fragment HI */
#define TXP_FSIZE 2 /* fragment size */
#define TXP_WORDS TXP_FRAGOFF + FRAGMAX*TXP_FSIZE + 1 /* 1 for tlink */
#define TXP_SIZE(sc) ((sc->bitmode) ? (TXP_WORDS*4) : (TXP_WORDS*2))
#define EOL 0x0001 /* end of list marker for link fields */
/*
* CDA, the CAM descriptor area. The SONIC has a 16 entry CAM to
* match incoming addresses against. It is programmed via DMA
* from a memory region.
*/
#define MAXCAM 16 /* number of user entries in CAM */
#define CDA_CAMDESC 4 /* # words i na descriptor */
#define CDA_CAMEP 0 /* CAM Address Port 0 xx-xx-xx-xx-YY-YY */
#define CDA_CAMAP0 1 /* CAM Address Port 1 xx-xx-YY-YY-xx-xx */
#define CDA_CAMAP1 2 /* CAM Address Port 2 YY-YY-xx-xx-xx-xx */
#define CDA_CAMAP2 3
#define CDA_ENABLE 64 /* mask enabling CAM entries */
#define CDA_SIZE(sc) ((4*16 + 1) * ((sc->bitmode) ? 4 : 2))
void snsetup __P((struct sn_softc *sc));
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