1 /* $NetBSD: midwayvar.h,v 1.10 1997/03/20 21:34:46 chuck Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 Charles D. Cranor and Washington University. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Charles D. Cranor and 18 * Washington University. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 * $FreeBSD$ 34 */ 35 36 /* 37 * m i d w a y v a r . h 38 * 39 * we define the en_softc here so that bus specific modules can allocate 40 * it as the first item in their softc. 41 * 42 * author: Chuck Cranor <chuck@ccrc.wustl.edu> 43 */ 44 45 /* 46 * params needed to determine softc size 47 */ 48 #ifndef EN_NTX 49 #define EN_NTX 8 /* number of tx bufs to use */ 50 #endif 51 #ifndef EN_TXSZ 52 #define EN_TXSZ 32 /* trasmit buf size in KB */ 53 #endif 54 #ifndef EN_RXSZ 55 #define EN_RXSZ 32 /* recv buf size in KB */ 56 #endif 57 58 /* largest possible NRX (depends on RAM size) */ 59 #define EN_MAXNRX ((2048 - (EN_NTX * EN_TXSZ)) / EN_RXSZ) 60 61 #ifndef EN_MAX_DMASEG 62 #define EN_MAX_DMASEG 32 63 #endif 64 65 /* number of bytes to use in the first receive buffer. This must not be larger 66 * than MHLEN, should be a multiple of 64 and must be a multiple of 4. */ 67 #define EN_RX1BUF 128 68 69 /* 70 * Structure to hold DMA maps. These are handle via a typestable uma zone. 71 */ 72 struct en_map { 73 uintptr_t flags; /* map flags */ 74 struct en_map *rsvd2; /* see uma_zalloc(9) */ 75 struct en_softc *sc; /* back pointer */ 76 bus_dmamap_t map; /* the map */ 77 }; 78 #define ENMAP_LOADED 0x02 79 #define ENMAP_ALLOC 0x01 80 81 #define EN_MAX_MAPS 400 82 83 /* 84 * Statistics 85 */ 86 struct en_stats { 87 uint32_t vtrash; /* sw copy of counter */ 88 uint32_t otrash; /* sw copy of counter */ 89 uint32_t ttrash; /* # of RBD's with T bit set */ 90 uint32_t mfixaddr; /* # of times we had to mfix an address */ 91 uint32_t mfixlen; /* # of times we had to mfix a lenght*/ 92 uint32_t mfixfail; /* # of times mfix failed */ 93 uint32_t txmbovr; /* # of times we dropped due to mbsize */ 94 uint32_t dmaovr; /* tx dma overflow count */ 95 uint32_t txoutspace; /* out of space in xmit buffer */ 96 uint32_t txdtqout; /* out of DTQs */ 97 uint32_t launch; /* total # of launches */ 98 uint32_t hwpull; /* # of pulls off hardware service list */ 99 uint32_t swadd; /* # of pushes on sw service list */ 100 uint32_t rxqnotus; /* # of times we pull from rx q, but fail */ 101 uint32_t rxqus; /* # of good pulls from rx q */ 102 uint32_t rxdrqout; /* # of times out of DRQs */ 103 uint32_t rxmbufout; /* # of time out of mbufs */ 104 uint32_t txnomap; /* out of DMA maps in TX */ 105 }; 106 107 /* 108 * Each of these structures describes one of the eight transmit channels 109 */ 110 struct en_txslot { 111 uint32_t mbsize; /* # mbuf bytes in use (max=TXHIWAT) */ 112 uint32_t bfree; /* # free bytes in buffer */ 113 uint32_t start; /* start of buffer area (byte offset) */ 114 uint32_t stop; /* ends of buffer area (byte offset) */ 115 uint32_t cur; /* next free area (byte offset) */ 116 uint32_t nref; /* # of VCs using this channel */ 117 struct ifqueue q; /* mbufs waiting for DMA now */ 118 struct ifqueue indma; /* mbufs waiting for DMA now */ 119 }; 120 121 /* 122 * Each of these structures is used for each of the receive buffers on the 123 * card. 124 */ 125 struct en_rxslot { 126 uint32_t mode; /* saved copy of mode info */ 127 uint32_t start; /* begin of my buffer area */ 128 uint32_t stop; /* end of my buffer area */ 129 uint32_t cur; /* where I am at in the buffer */ 130 struct en_vcc *vcc; /* backpointer to VCI */ 131 struct ifqueue q; /* mbufs waiting for dma now */ 132 struct ifqueue indma; /* mbufs being dma'd now */ 133 }; 134 135 struct en_vcc { 136 struct atmio_vcc vcc; /* required by common code */ 137 void *rxhand; 138 u_int vflags; 139 uint32_t ipackets; 140 uint32_t opackets; 141 uint32_t ibytes; 142 uint32_t obytes; 143 144 uint8_t txspeed; 145 struct en_txslot *txslot; /* transmit slot */ 146 struct en_rxslot *rxslot; /* receive slot */ 147 }; 148 #define VCC_DRAIN 0x0001 /* closed, but draining rx */ 149 #define VCC_SWSL 0x0002 /* on rx software service list */ 150 #define VCC_CLOSE_RX 0x0004 /* currently closing */ 151 152 /* 153 * softc 154 */ 155 struct en_softc { 156 struct ifnet *ifp; 157 device_t dev; 158 159 /* bus glue */ 160 bus_space_tag_t en_memt; /* for EN_READ/EN_WRITE */ 161 bus_space_handle_t en_base; /* base of en card */ 162 bus_size_t en_obmemsz; /* size of en card (bytes) */ 163 void (*en_busreset)(void *); /* bus specific reset function */ 164 bus_dma_tag_t txtag; /* TX DMA tag */ 165 166 /* serv list */ 167 uint32_t hwslistp; /* hw pointer to service list (byte offset) */ 168 uint16_t swslist[MID_SL_N]; /* software svc list (see en_service()) */ 169 uint16_t swsl_head; /* ends of swslist (index into swslist) */ 170 uint16_t swsl_tail; 171 uint32_t swsl_size; /* # of items in swsl */ 172 173 /* xmit dma */ 174 uint32_t dtq[MID_DTQ_N];/* sw copy of dma q (see EN_DQ_MK macros) */ 175 uint32_t dtq_free; /* # of dtq's free */ 176 uint32_t dtq_us; /* software copy of our pointer (byte offset) */ 177 uint32_t dtq_chip; /* chip's pointer (byte offset) */ 178 uint32_t need_dtqs; /* true if we ran out of DTQs */ 179 180 /* recv dma */ 181 uint32_t drq[MID_DRQ_N];/* sw copy of dma q (see ENIDQ macros) */ 182 uint32_t drq_free; /* # of drq's free */ 183 uint32_t drq_us; /* software copy of our pointer (byte offset) */ 184 uint32_t drq_chip; /* chip's pointer (byte offset) */ 185 uint32_t need_drqs; /* true if we ran out of DRQs */ 186 187 /* xmit buf ctrl. (per channel) */ 188 struct en_txslot txslot[MID_NTX_CH]; 189 190 /* recv buf ctrl. (per recv slot) */ 191 struct en_rxslot rxslot[EN_MAXNRX]; 192 int en_nrx; /* # of active rx slots */ 193 194 /* vccs */ 195 struct en_vcc **vccs; 196 u_int vccs_open; 197 struct cv cv_close; /* close CV */ 198 199 /* stats */ 200 struct en_stats stats; 201 202 /* random stuff */ 203 uint32_t ipl; /* sbus interrupt lvl (1 on pci?) */ 204 uint8_t bestburstcode; /* code of best burst we can use */ 205 uint8_t bestburstlen; /* length of best burst (bytes) */ 206 uint8_t bestburstshift; /* (x >> shift) == (x / bestburstlen) */ 207 uint8_t bestburstmask; /* bits to check if not multiple of burst */ 208 uint8_t alburst; /* align dma bursts? */ 209 uint8_t noalbursts; /* don't use unaligned > 4 byte bursts */ 210 uint8_t is_adaptec; /* adaptec version of midway? */ 211 struct mbuf *padbuf; /* buffer of zeros for TX padding */ 212 213 /* mutex to protect this structure and the associated hardware */ 214 struct mtx en_mtx; 215 216 /* sysctl support */ 217 struct sysctl_ctx_list sysctl_ctx; 218 struct sysctl_oid *sysctl_tree; 219 220 /* memory zones */ 221 uma_zone_t map_zone; 222 223 /* media and phy */ 224 struct ifmedia media; 225 struct utopia utopia; 226 227 #ifdef EN_DEBUG 228 /* debugging */ 229 u_int debug; 230 #endif 231 }; 232 233 /* 234 * exported functions 235 */ 236 int en_attach(struct en_softc *); 237 void en_destroy(struct en_softc *); 238 void en_intr(void *); 239 void en_reset(struct en_softc *); 240 int en_modevent(module_t, int, void *arg); 241