/* $NetBSD: if_snvar.h,v 1.5 1997/04/10 03:22:47 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_snvar.h -- National Semiconductor DP83932BVF (SONIC) NetBSD/mac68k vars */ /* * 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)) /* * Register access macros. We use bus_space_* to talk to the Sonic * registers. A mapping table is used in case a particular configuration * hooked the regs up at non-word offsets. */ #define NIC_GET(sc, reg) (bus_space_read_2((sc)->sc_regt, \ (sc)->sc_regh, \ ((sc)->sc_reg_map[reg]))) #define NIC_PUT(sc, reg, val) (bus_space_write_2((sc)->sc_regt, \ (sc)->sc_regh, \ ((sc)->sc_reg_map[reg]), \ (val))) #define SN_REGSIZE SN_NREGS*4 /* mac68k does not have any write buffers to flush... */ #define wbflush() /* * 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 8 /* # receive buffers < NRRA */ #define RBAMASK (NRBA-1) #define NRDA NRBA*4 #define NTDA 4 /* # transmit descriptors */ #define NRRA 32 /* # receive resource descriptors */ #define RRAMASK (NRRA-1) /* 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 */ #define SN_NPAGES 1 + 8 + 5 /* * 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 ethercom sc_ethercom; #define sc_if sc_ethercom.ec_if /* network visible interface */ 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 */ bus_size_t sc_reg_map[SN_NREGS]; /* register offsets */ u_int16_t snr_dcr; /* DCR for this instance */ u_int16_t snr_dcr2; /* DCR2 for this instance */ int slotno; /* Slot number */ 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_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; } 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 8 /* 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_FRAGSIZE) + 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)) int snsetup __P((struct sn_softc *sc, u_int8_t *)); void snintr __P((void *, int));