if_snvar.h revision 1.3
1 /* $NetBSD: if_snvar.h,v 1.3 1997/03/17 04:57:58 briggs Exp $ */ 2 3 /* 4 * Copyright (c) 1991 Algorithmics Ltd (http://www.algor.co.uk) 5 * You may use, copy, and modify this program so long as you retain the 6 * copyright line. 7 */ 8 9 /* 10 * if_sonic.h -- National Semiconductor DP83932BVF (SONIC) 11 */ 12 13 /* 14 * Memory access macros. Since we handle SONIC in 16 bit mode (PB5X0) 15 * and 32 bit mode (everything else) using a single GENERIC kernel 16 * binary, all structures have to be accessed using macros which can 17 * adjust the offsets appropriately. 18 */ 19 #define SWO(m, a, o, x) (m ? (*(u_int32_t *)((u_int32_t *)a + o) = (x)) : \ 20 (*(u_int16_t *)((u_int16_t *)a + o) = (x))) 21 #define SRO(m, a, o) (m ? (*(u_int32_t *)((u_int32_t *)a + o) & 0xffff) : \ 22 (*(u_int16_t *)((u_int16_t *)a + o) & 0xffff)) 23 24 /* 25 * buffer sizes in 32 bit mode 26 * 1 TXpkt is 4 hdr words + (3 * FRAGMAX) + 1 link word 27 * FRAGMAX == 16 => 54 words == 216 bytes 28 * 29 * 1 RxPkt is 7 words == 28 bytes 30 * 1 Rda is 4 words == 16 bytes 31 */ 32 33 #define NRBA 16 /* # receive buffers < NRRA */ 34 #define RBAMASK 0x0f 35 #define NRDA NRBA 36 #define NTDA 4 /* # transmit descriptors */ 37 #define NRRA 32 /* # receive resource descriptors */ 38 #define RRAMASK 0x1f /* the reason why it must be power of two */ 39 40 #define FCSSIZE 4 /* size of FCS appended to packets */ 41 42 /* 43 * maximum receive packet size plus 2 byte pad to make each 44 * one aligned. 4 byte slop (required for eobc) 45 */ 46 #define RBASIZE(sc) (sizeof(struct ether_header) + ETHERMTU + FCSSIZE + \ 47 ((sc)->bitmode ? 6 : 2)) 48 49 /* 50 * transmit buffer area 51 */ 52 #define NTXB 10 /* Number of xmit buffers */ 53 #define TXBSIZE 1536 /* 6*2^8 -- the same size as the 8390 TXBUF */ 54 55 /* 56 * Statistics collected over time 57 */ 58 struct sn_stats { 59 int ls_opacks; /* packets transmitted */ 60 int ls_ipacks; /* packets received */ 61 int ls_tdr; /* contents of tdr after collision */ 62 int ls_tdef; /* packets where had to wait */ 63 int ls_tone; /* packets with one retry */ 64 int ls_tmore; /* packets with more than one retry */ 65 int ls_tbuff; /* transmit buff errors */ 66 int ls_tuflo; /* " uflo " */ 67 int ls_tlcol; 68 int ls_tlcar; 69 int ls_trtry; 70 int ls_rbuff; /* receive buff errors */ 71 int ls_rfram; /* framing */ 72 int ls_roflo; /* overflow */ 73 int ls_rcrc; 74 int ls_rrng; /* rx ring sequence error */ 75 int ls_babl; /* chip babl error */ 76 int ls_cerr; /* collision error */ 77 int ls_miss; /* missed packet */ 78 int ls_merr; /* memory error */ 79 int ls_copies; /* copies due to out of range mbufs */ 80 int ls_maxmbufs; /* max mbufs on transmit */ 81 int ls_maxslots; /* max ring slots on transmit */ 82 }; 83 84 typedef struct mtd { 85 void *mtd_txp; 86 int mtd_vtxp; 87 unsigned char *mtd_buf; 88 } mtd_t; 89 90 /* 91 * The sn_softc for Mac68k if_sn. 92 */ 93 typedef struct sn_softc { 94 struct device sc_dev; 95 struct ethercom sc_ethercom; 96 #define sc_if sc_ethercom.ec_if /* network visible interface */ 97 u_int8_t sc_enaddr[6]; /* Keep MAC address here until we have multicast */ 98 99 bus_space_tag_t sc_regt; 100 bus_space_handle_t sc_regh; 101 102 struct sn_stats sc_sum; 103 short sc_iflags; 104 unsigned short bitmode; /* 32 bit mode == 1, 16 == 0 */ 105 106 unsigned int s_dcr; /* DCR for this instance */ 107 int slotno; /* Slot number */ 108 struct sonic_reg *sc_csr; /* hardware pointer */ 109 int sc_rxmark; /* pos. in rx ring for reading buffs */ 110 111 int sc_rramark; /* index into p_rra of wp */ 112 void *p_rra[NRRA]; /* RX resource descs */ 113 int v_rra[NRRA]; /* DMA addresses of p_rra */ 114 int v_rea; /* ptr to the end of the rra space */ 115 116 int sc_rdamark; 117 void *p_rda[NRDA]; 118 int v_rda[NRDA]; 119 120 caddr_t rbuf[NRBA]; 121 122 int sc_txhead; /*XXX idx of first TDA passed to chip */ 123 int sc_missed; /* missed packet counter */ 124 125 int txb_cnt; /* total number of xmit buffers */ 126 int txb_inuse; /* number of active xmit buffers */ 127 int txb_new; /* index of next open slot. */ 128 129 struct mtd mtda[NTDA]; 130 int mtd_hw; /* idx of first mtd given to hw */ 131 int mtd_prev; /* idx of last mtd given to hardware */ 132 int mtd_free; /* next free mtd to use */ 133 int mtd_tlinko; /* 134 * offset of tlink of last txp given 135 * to SONIC. Need to clear EOL on 136 * this word to add a desc. 137 */ 138 139 caddr_t tbuf[NTXB]; 140 int vtbuf[NTXB]; /* DMA address of tbuf */ 141 142 void *p_cda; 143 int v_cda; 144 145 unsigned char space[(1 + 1 + 8 + 5) * NBPG]; 146 } sn_softc_t; 147 148 /* 149 * Accessing SONIC data structures and registers as 32 bit values 150 * makes code endianess independent. The SONIC is however always in 151 * bigendian mode so it is necessary to ensure that data structures shared 152 * between the CPU and the SONIC are always in bigendian order. 153 */ 154 155 /* 156 * Receive Resource Descriptor 157 * This structure describes the buffers into which packets 158 * will be received. Note that more than one packet may be 159 * packed into a single buffer if constraints permit. 160 */ 161 #define RXRSRC_PTRLO 0 /* buffer address LO */ 162 #define RXRSRC_PTRHI 1 /* buffer address HI */ 163 #define RXRSRC_WCLO 2 /* buffer size (16bit words) LO */ 164 #define RXRSRC_WCHI 3 /* buffer size (16bit words) HI */ 165 166 #define RXRSRC_SIZE(sc) (sc->bitmode ? (4 * 4) : (4 * 2)) 167 168 /* 169 * Receive Descriptor 170 * This structure holds information about packets received. 171 */ 172 #define RXPKT_STATUS 0 173 #define RXPKT_BYTEC 1 174 #define RXPKT_PTRLO 2 175 #define RXPKT_PTRHI 3 176 #define RXPKT_SEQNO 4 177 #define RXPKT_RLINK 5 178 #define RXPKT_INUSE 6 179 #define RXPKT_SIZE(sc) (sc->bitmode ? (7 * 4) : (7 * 2)) 180 181 #define RBASEQ(x) (((x)>>8)&0xff) 182 #define PSNSEQ(x) ((x) & 0xff) 183 184 /* 185 * Transmit Descriptor 186 * This structure holds information about packets to be transmitted. 187 */ 188 #define FRAGMAX 16 /* maximum number of fragments in a packet */ 189 190 #define TXP_STATUS 0 /* + transmitted packet status */ 191 #define TXP_CONFIG 1 /* transmission configuration */ 192 #define TXP_PKTSIZE 2 /* entire packet size in bytes */ 193 #define TXP_FRAGCNT 3 /* # fragments in packet */ 194 195 #define TXP_FRAGOFF 4 /* offset to first fragment */ 196 #define TXP_FRAGSIZE 3 /* size of each fragment desc */ 197 #define TXP_FPTRLO 0 /* ptr to packet fragment LO */ 198 #define TXP_FPTRHI 1 /* ptr to packet fragment HI */ 199 #define TXP_FSIZE 2 /* fragment size */ 200 201 #define TXP_WORDS TXP_FRAGOFF + FRAGMAX*TXP_FSIZE + 1 /* 1 for tlink */ 202 #define TXP_SIZE(sc) ((sc->bitmode) ? (TXP_WORDS*4) : (TXP_WORDS*2)) 203 204 #define EOL 0x0001 /* end of list marker for link fields */ 205 206 /* 207 * CDA, the CAM descriptor area. The SONIC has a 16 entry CAM to 208 * match incoming addresses against. It is programmed via DMA 209 * from a memory region. 210 */ 211 #define MAXCAM 16 /* number of user entries in CAM */ 212 #define CDA_CAMDESC 4 /* # words i na descriptor */ 213 #define CDA_CAMEP 0 /* CAM Address Port 0 xx-xx-xx-xx-YY-YY */ 214 #define CDA_CAMAP0 1 /* CAM Address Port 1 xx-xx-YY-YY-xx-xx */ 215 #define CDA_CAMAP1 2 /* CAM Address Port 2 YY-YY-xx-xx-xx-xx */ 216 #define CDA_CAMAP2 3 217 #define CDA_ENABLE 64 /* mask enabling CAM entries */ 218 #define CDA_SIZE(sc) ((4*16 + 1) * ((sc->bitmode) ? 4 : 2)) 219 220 void snsetup __P((struct sn_softc *sc, u_int8_t *)); 221
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