1 /* $NetBSD: if_snvar.h,v 1.13 2011/02/20 07:56:31 matt 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_snvar.h -- National Semiconductor DP8393X (SONIC) NetBSD/newsmips vars 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) (*(uint32_t *)((uint32_t *)(a) + (o)) = (x)) 20 #define SRO(m, a, o) (*(uint32_t *)((uint32_t *)(a) + (o)) & 0xffff) 21 22 /* 23 * Register access macros. We use bus_space_* to talk to the Sonic 24 * registers. A mapping table is used in case a particular configuration 25 * hooked the regs up at non-word offsets. 26 */ 27 #define NIC_GET(sc, reg) ((sc)->sc_regbase[(reg) * 4 + 3]) 28 #define NIC_PUT(sc, reg, val) ((sc)->sc_regbase[(reg) * 4 + 3] = val) 29 30 #define SONIC_GETDMA(p) ((uint32_t)(p)) 31 32 #define SN_REGSIZE (SN_NREGS * 4) 33 34 #include <mips/locore.h> 35 36 /* 37 * buffer sizes in 32 bit mode 38 * 1 TXpkt is 4 hdr words + (3 * FRAGMAX) + 1 link word == 23 words == 92 bytes 39 * 40 * 1 RxPkt is 7 words == 28 bytes 41 * 1 Rda is 4 words == 16 bytes 42 * 43 * The CDA is 17 words == 68 bytes 44 * 45 * total space in page 0 = NTDA * 92 + NRRA * 16 + NRDA * 28 + 68 46 */ 47 48 #define NRBA 4 /* # receive buffers < NRRA */ 49 #define RBAMASK (NRBA - 1) 50 #define NTDA 4 /* # transmit descriptors */ 51 #define NRRA 8 /* # receive resource descriptors */ 52 #define RRAMASK (NRRA - 1) /* the reason why NRRA must be power of two */ 53 54 #define FCSSIZE 4 /* size of FCS appended to packets */ 55 56 /* 57 * maximum receive packet size plus 2 byte pad to make each 58 * one aligned. 4 byte slop (required for eobc) 59 */ 60 #define RBASIZE(sc) (ETHER_HDR_LEN + ETHERMTU + FCSSIZE + 6) 61 62 /* 63 * transmit buffer area 64 */ 65 #define TXBSIZE 1536 /* 6*2^8 -- the same size as the 8390 TXBUF */ 66 67 #define SN_NPAGES 2 + NRBA + (NTDA / 2) 68 69 typedef struct mtd { 70 void *mtd_txp; 71 uint32_t mtd_vtxp; 72 void *mtd_buf; 73 uint32_t mtd_vbuf; 74 struct mbuf *mtd_mbuf; 75 } mtd_t; 76 77 /* 78 * The sn_softc for NEWS5000 if_sn. 79 */ 80 struct sn_softc { 81 device_t sc_dev; 82 struct ethercom sc_ethercom; 83 #define sc_if sc_ethercom.ec_if /* network visible interface */ 84 85 void * sc_hwbase; /* hardware base address */ 86 volatile uint16_t *sc_regbase; /* register base address */ 87 88 int bitmode; /* 32 bit mode == 1, 16 == 0 */ 89 90 uint16_t snr_dcr; /* DCR for this instance */ 91 uint16_t snr_dcr2; /* DCR2 for this instance */ 92 int slotno; /* Slot number */ 93 94 int sc_rramark; /* index into p_rra of wp */ 95 void *p_rra[NRRA]; /* RX resource descs */ 96 uint32_t v_rra[NRRA]; /* DMA addresses of p_rra */ 97 uint32_t v_rea; /* ptr to the end of the rra space */ 98 99 int sc_rxmark; /* current hw pos in rda ring */ 100 int sc_rdamark; /* current sw pos in rda ring */ 101 int sc_nrda; /* total number of RDAs */ 102 void *p_rda; 103 uint32_t v_rda; 104 105 void *rbuf[NRBA]; 106 107 struct mtd mtda[NTDA]; 108 int mtd_hw; /* idx of first mtd given to hw */ 109 int mtd_prev; /* idx of last mtd given to hardware */ 110 int mtd_free; /* next free mtd to use */ 111 int mtd_tlinko; /* 112 * offset of tlink of last txp given 113 * to SONIC. Need to clear EOL on 114 * this word to add a desc. 115 */ 116 int mtd_pint; /* Counter to set TXP_PINT */ 117 118 void *p_cda; 119 uint32_t v_cda; 120 121 unsigned char *space; 122 }; 123 124 /* 125 * Accessing SONIC data structures and registers as 32 bit values 126 * makes code endianess independent. The SONIC is however always in 127 * bigendian mode so it is necessary to ensure that data structures shared 128 * between the CPU and the SONIC are always in bigendian order. 129 */ 130 131 /* 132 * Receive Resource Descriptor 133 * This structure describes the buffers into which packets 134 * will be received. Note that more than one packet may be 135 * packed into a single buffer if constraints permit. 136 */ 137 #define RXRSRC_PTRLO 0 /* buffer address LO */ 138 #define RXRSRC_PTRHI 1 /* buffer address HI */ 139 #define RXRSRC_WCLO 2 /* buffer size (16bit words) LO */ 140 #define RXRSRC_WCHI 3 /* buffer size (16bit words) HI */ 141 142 #define RXRSRC_SIZE(sc) (4 * 4) 143 144 /* 145 * Receive Descriptor 146 * This structure holds information about packets received. 147 */ 148 #define RXPKT_STATUS 0 149 #define RXPKT_BYTEC 1 150 #define RXPKT_PTRLO 2 151 #define RXPKT_PTRHI 3 152 #define RXPKT_SEQNO 4 153 #define RXPKT_RLINK 5 154 #define RXPKT_INUSE 6 155 #define RXPKT_SIZE(sc) (7 * 4) 156 157 #define RBASEQ(x) (((x) >> 8) & 0xff) 158 #define PSNSEQ(x) ((x) & 0xff) 159 160 /* 161 * Transmit Descriptor 162 * This structure holds information about packets to be transmitted. 163 */ 164 #define FRAGMAX 8 /* maximum number of fragments in a packet */ 165 166 #define TXP_STATUS 0 /* + transmitted packet status */ 167 #define TXP_CONFIG 1 /* transmission configuration */ 168 #define TXP_PKTSIZE 2 /* entire packet size in bytes */ 169 #define TXP_FRAGCNT 3 /* # fragments in packet */ 170 171 #define TXP_FRAGOFF 4 /* offset to first fragment */ 172 #define TXP_FRAGSIZE 3 /* size of each fragment desc */ 173 #define TXP_FPTRLO 0 /* ptr to packet fragment LO */ 174 #define TXP_FPTRHI 1 /* ptr to packet fragment HI */ 175 #define TXP_FSIZE 2 /* fragment size */ 176 177 #define TXP_WORDS (TXP_FRAGOFF + (FRAGMAX * TXP_FRAGSIZE) + 1) /* 1 for tlink */ 178 #define TXP_SIZE(sc) (TXP_WORDS*4) 179 180 #define EOL 0x0001 /* end of list marker for link fields */ 181 182 /* 183 * CDA, the CAM descriptor area. The SONIC has a 16 entry CAM to 184 * match incoming addresses against. It is programmed via DMA 185 * from a memory region. 186 */ 187 #define MAXCAM 16 /* number of user entries in CAM */ 188 #define CDA_CAMDESC 4 /* # words i na descriptor */ 189 #define CDA_CAMEP 0 /* CAM Address Port 0 xx-xx-xx-xx-YY-YY */ 190 #define CDA_CAMAP0 1 /* CAM Address Port 1 xx-xx-YY-YY-xx-xx */ 191 #define CDA_CAMAP1 2 /* CAM Address Port 2 YY-YY-xx-xx-xx-xx */ 192 #define CDA_CAMAP2 3 193 #define CDA_ENABLE 64 /* mask enabling CAM entries */ 194 #define CDA_SIZE(sc) ((4 * 16 + 1) * ((sc->bitmode) ? 4 : 2)) 195 196 int snsetup(struct sn_softc *sc, uint8_t *); 197 int snintr(void *); 198 void sn_md_init(struct sn_softc *); 199