if_casvar.h revision 1.5
1/* $OpenBSD: if_casvar.h,v 1.5 2007/11/26 17:15:32 kettenis Exp $ */ 2 3/* 4 * 5 * Copyright (C) 2007 Mark Kettenis. 6 * Copyright (C) 2001 Eduardo Horvath. 7 * All rights reserved. 8 * 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 */ 32 33#ifndef _IF_CASVAR_H 34#define _IF_CASVAR_H 35 36#include <sys/queue.h> 37#include <sys/timeout.h> 38 39/* 40 * Misc. definitions for Sun Cassini ethernet controllers. 41 */ 42 43/* 44 * Preferred page size. Cassini has a configurable page size, but 45 * needs at least 8k to handle jumbo frames. This happens to be the 46 * default anyway. 47 */ 48#define CAS_PAGE_SIZE 8192 49 50/* 51 * Transmit descriptor ring size. This is arbitrary, but allocate 52 * enough descriptors for 64 pending transmissions and 16 segments 53 * per packet. 54 */ 55#define CAS_NTXSEGS 16 56 57#define CAS_TXQUEUELEN 64 58#define CAS_NTXDESC (CAS_TXQUEUELEN * CAS_NTXSEGS) 59#define CAS_NTXDESC_MASK (CAS_NTXDESC - 1) 60#define CAS_NEXTTX(x) ((x + 1) & CAS_NTXDESC_MASK) 61 62struct cas_sxd { 63 struct mbuf *sd_mbuf; 64 bus_dmamap_t sd_map; 65}; 66 67/* 68 * Receive descriptor ring size. We have one Rx buffer per incoming 69 * packet, so this logic is a little simpler. 70 */ 71#define CAS_NRXDESC 128 72#define CAS_NRXDESC_MASK (CAS_NRXDESC - 1) 73 74/* 75 * Receive completion ring size. 76 */ 77#define CAS_NRXCOMP 256 78#define CAS_NRXCOMP_MASK (CAS_NRXCOMP - 1) 79#define CAS_NEXTRX(x) ((x + 1) & CAS_NRXCOMP_MASK) 80 81/* 82 * Control structures are DMA'd to the Cassini chip. We allocate them in 83 * a single clump that maps to a single DMA segment to make several things 84 * easier. 85 */ 86struct cas_control_data { 87 /* 88 * The transmit descriptors. 89 */ 90 struct cas_desc ccd_txdescs[CAS_NTXDESC]; 91 92 /* 93 * The receive completions. 94 */ 95 struct cas_comp ccd_rxcomps[CAS_NRXCOMP]; 96 97 /* 98 * The receive descriptors. 99 */ 100 struct cas_desc ccd_rxdescs[CAS_NRXDESC]; 101 char ccd_unused[CAS_PAGE_SIZE - CAS_NRXDESC * 16]; 102 struct cas_desc ccd_rxdescs2[CAS_NRXDESC]; 103}; 104 105#define CAS_CDOFF(x) offsetof(struct cas_control_data, x) 106#define CAS_CDTXOFF(x) CAS_CDOFF(ccd_txdescs[(x)]) 107#define CAS_CDRXOFF(x) CAS_CDOFF(ccd_rxdescs[(x)]) 108#define CAS_CDRXOFF2(x) CAS_CDOFF(ccd_rxdescs2[(x)]) 109#define CAS_CDRXCOFF(x) CAS_CDOFF(ccd_rxcomps[(x)]) 110 111/* 112 * Software state for receive jobs. 113 */ 114struct cas_rxsoft { 115 bus_dmamap_t rxs_dmamap; /* our DMA map */ 116 bus_dma_segment_t rxs_dmaseg; /* our DMA segment */ 117 caddr_t rxs_kva; 118}; 119 120/* 121 * Software state per device. 122 */ 123struct cas_softc { 124 struct device sc_dev; /* generic device information */ 125 struct arpcom sc_arpcom; /* ethernet common data */ 126 struct mii_data sc_mii; /* MII media control */ 127#define sc_media sc_mii.mii_media/* shorthand */ 128 struct timeout sc_tick_ch; /* tick callout */ 129 130 bus_space_tag_t sc_memt; 131 bus_space_handle_t sc_memh; 132 void *sc_ih; 133 134 bus_dma_tag_t sc_dmatag; /* bus dma tag */ 135 bus_dmamap_t sc_dmamap; /* bus dma handle */ 136 int sc_burst; /* DVMA burst size in effect */ 137 int sc_phys[2]; /* MII instance -> PHY map */ 138 139 int sc_if_flags; 140 141 int sc_mif_config; /* Selected MII reg setting */ 142 143 /* 144 * Ring buffer DMA stuff. 145 */ 146 bus_dma_segment_t sc_cdseg; /* control data memory */ 147 int sc_cdnseg; /* number of segments */ 148 bus_dmamap_t sc_cddmamap; /* control data DMA map */ 149#define sc_cddma sc_cddmamap->dm_segs[0].ds_addr 150 151 /* 152 * Software state for transmit and receive descriptors. 153 */ 154 struct cas_sxd sc_txd[CAS_NTXDESC]; 155 u_int32_t sc_tx_cnt, sc_tx_prod, sc_tx_cons; 156 157 struct cas_rxsoft sc_rxsoft[CAS_NRXDESC]; 158 struct cas_rxsoft sc_rxsoft2[CAS_NRXDESC]; 159 160 /* 161 * Control data structures. 162 */ 163 struct cas_control_data *sc_control_data; 164#define sc_txdescs sc_control_data->ccd_txdescs 165#define sc_rxdescs sc_control_data->ccd_rxdescs 166#define sc_rxdescs2 sc_control_data->ccd_rxdescs2 167#define sc_rxcomps sc_control_data->ccd_rxcomps 168 169 int sc_rxptr; /* next ready RX descriptor/descsoft */ 170 int sc_rxfifosize; 171 int sc_rxdptr; 172 173 int sc_rev; 174 int sc_inited; 175 int sc_debug; 176 void *sc_sh; /* shutdownhook cookie */ 177}; 178 179/* 180 * This maccro determines whether we have a Cassini+. 181 */ 182#define CAS_PLUS(sc) (sc->sc_rev > 0x10) 183 184#define CAS_DMA_READ(v) letoh64(v) 185#define CAS_DMA_WRITE(v) htole64(v) 186 187#define CAS_CDTXADDR(sc, x) ((sc)->sc_cddma + CAS_CDTXOFF((x))) 188#define CAS_CDRXADDR(sc, x) ((sc)->sc_cddma + CAS_CDRXOFF((x))) 189#define CAS_CDRXADDR2(sc, x) ((sc)->sc_cddma + CAS_CDRXOFF2((x))) 190#define CAS_CDRXCADDR(sc, x) ((sc)->sc_cddma + CAS_CDRXCOFF((x))) 191 192#define CAS_CDTXSYNC(sc, x, n, ops) \ 193do { \ 194 int __x, __n; \ 195 \ 196 __x = (x); \ 197 __n = (n); \ 198 \ 199 /* If it will wrap around, sync to the end of the ring. */ \ 200 if ((__x + __n) > CAS_NTXDESC) { \ 201 bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap, \ 202 CAS_CDTXOFF(__x), sizeof(struct cas_desc) * \ 203 (CAS_NTXDESC - __x), (ops)); \ 204 __n -= (CAS_NTXDESC - __x); \ 205 __x = 0; \ 206 } \ 207 \ 208 /* Now sync whatever is left. */ \ 209 bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap, \ 210 CAS_CDTXOFF(__x), sizeof(struct cas_desc) * __n, (ops)); \ 211} while (0) 212 213#define CAS_CDRXSYNC(sc, x, ops) \ 214 bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap, \ 215 CAS_CDRXOFF((x)), sizeof(struct cas_desc), (ops)) 216 217#define CAS_CDRXCSYNC(sc, x, ops) \ 218 bus_dmamap_sync((sc)->sc_dmatag, (sc)->sc_cddmamap, \ 219 CAS_CDRXCOFF((x)), sizeof(struct cas_desc), (ops)) 220 221#define CAS_INIT_RXDESC(sc, d, s) \ 222do { \ 223 struct cas_rxsoft *__rxs = &sc->sc_rxsoft[(s)]; \ 224 struct cas_desc *__rxd = &sc->sc_rxdescs[(d)]; \ 225 \ 226 __rxd->cd_addr = \ 227 CAS_DMA_WRITE(__rxs->rxs_dmamap->dm_segs[0].ds_addr); \ 228 __rxd->cd_flags = \ 229 CAS_DMA_WRITE((s)); \ 230 CAS_CDRXSYNC((sc), (d), BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); \ 231} while (0) 232 233#endif 234