wdsc.c revision 1.11
1 /* $NetBSD: wdsc.c,v 1.11 2003/07/15 03:35:53 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Wayne Knowles 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Wayne Knowles 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: wdsc.c,v 1.11 2003/07/15 03:35:53 lukem Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/device.h> 46 #include <sys/buf.h> 47 48 #include <dev/scsipi/scsi_all.h> 49 #include <dev/scsipi/scsipi_all.h> 50 #include <dev/scsipi/scsiconf.h> 51 52 #include <machine/cpu.h> 53 #include <machine/bus.h> 54 #include <machine/autoconf.h> 55 56 #include <sgimips/hpc/hpcvar.h> 57 #include <sgimips/hpc/hpcreg.h> 58 #include <sgimips/hpc/hpcdma.h> 59 60 #include <sgimips/hpc/sbicreg.h> 61 #include <sgimips/hpc/sbicvar.h> 62 63 #include <opt_kgdb.h> 64 #include <sys/kgdb.h> 65 66 struct wdsc_softc { 67 struct wd33c93_softc sc_wd33c93; /* Must be first */ 68 struct evcnt sc_intrcnt; /* Interrupt counter */ 69 bus_dma_tag_t sc_dmat; 70 bus_dmamap_t sc_dmamap; 71 int sc_flags; 72 #define WDSC_DMA_ACTIVE 0x1 73 #define WDSC_DMA_MAPLOADED 0x2 74 struct hpc_dma_softc sc_hpcdma; 75 }; 76 77 78 void wdsc_attach __P((struct device *, struct device *, void *)); 79 int wdsc_match __P((struct device *, struct cfdata *, void *)); 80 81 CFATTACH_DECL(wdsc, sizeof(struct wdsc_softc), 82 wdsc_match, wdsc_attach, NULL, NULL); 83 84 int wdsc_dmasetup __P((struct wd33c93_softc *, caddr_t *,size_t *, 85 int, size_t *)); 86 int wdsc_dmago __P((struct wd33c93_softc *)); 87 void wdsc_dmastop __P((struct wd33c93_softc *)); 88 void wdsc_reset __P((struct wd33c93_softc *)); 89 int wdsc_dmaintr __P((void *)); 90 int wdsc_scsiintr __P((void *)); 91 92 #define MAX_SCSI_XFER (512*1024) 93 #define MAX_SEG_SZ 8192 94 #define MAX_DMA_SZ MAX_SCSI_XFER 95 #define DMA_SEGS (MAX_DMA_SZ/MAX_SEG_SZ) 96 97 /* 98 * Match for SCSI devices on the onboard WD33C93 chip 99 */ 100 int 101 wdsc_match(pdp, cf, auxp) 102 struct device *pdp; 103 struct cfdata *cf; 104 void *auxp; 105 { 106 struct hpc_attach_args *haa = auxp; 107 108 if (strcmp(haa->ha_name, cf->cf_name) == 0) 109 return (1); 110 111 return (0); 112 } 113 114 /* 115 * Attach the wdsc driver 116 */ 117 void 118 wdsc_attach(pdp, dp, auxp) 119 struct device *pdp, *dp; 120 void *auxp; 121 { 122 struct wd33c93_softc *sc = (void *)dp; 123 struct wdsc_softc *wsc = (void *)dp; 124 struct hpc_attach_args *haa = auxp; 125 int err; 126 127 sc->sc_regt = haa->ha_st; 128 wsc->sc_dmat = haa->ha_dmat; 129 130 if ((err = bus_space_subregion(haa->ha_st, haa->ha_sh, 131 haa->ha_devoff, 132 HPC_SCSI0_DEVREGS_SIZE, 133 &sc->sc_regh)) != 0) { 134 printf(": unable to map regs, err=%d\n", err); 135 return; 136 } 137 138 if (bus_dmamap_create(wsc->sc_dmat, MAX_DMA_SZ, 139 DMA_SEGS, MAX_SEG_SZ, MAX_SEG_SZ, 140 BUS_DMA_WAITOK, 141 &wsc->sc_dmamap) != 0) { 142 printf(": failed to create dmamap\n"); 143 return; 144 } 145 146 sc->sc_dmasetup = wdsc_dmasetup; 147 sc->sc_dmago = wdsc_dmago; 148 sc->sc_dmastop = wdsc_dmastop; 149 sc->sc_reset = wdsc_reset; 150 151 sc->sc_adapter.adapt_request = wd33c93_scsi_request; 152 sc->sc_adapter.adapt_minphys = minphys; 153 154 sc->sc_id = 7; /* Host ID = 7 */ 155 sc->sc_clkfreq = 200; /* 20MHz Clock */ 156 157 evcnt_attach_dynamic(&wsc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 158 sc->sc_dev.dv_xname, "intr"); 159 160 if ((cpu_intr_establish(haa->ha_irq, IPL_BIO, 161 wdsc_scsiintr, sc)) == NULL) { 162 printf(": unable to establish interrupt!\n"); 163 return; 164 } 165 166 hpcdma_init(haa, &wsc->sc_hpcdma, DMA_SEGS); 167 wd33c93_attach(sc); 168 return; 169 } 170 171 /* 172 * Prime the hardware for a DMA transfer 173 * 174 * Requires splbio() interrupts to be disabled by the caller 175 */ 176 int 177 wdsc_dmasetup(dev, addr, len, datain, dmasize) 178 struct wd33c93_softc *dev; 179 caddr_t *addr; 180 size_t *len; 181 int datain; 182 size_t *dmasize; 183 { 184 struct wdsc_softc *wsc = (void *)dev; 185 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 186 int count, err; 187 void *vaddr; 188 189 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 190 191 vaddr = *addr; 192 count = dsc->sc_dlen = *len; 193 if (count) { 194 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED) == 0); 195 196 /* Build list of physical addresses for this transfer */ 197 if ((err=bus_dmamap_load(wsc->sc_dmat, wsc->sc_dmamap, 198 vaddr, count, 199 NULL /* kernel address */, 200 BUS_DMA_NOWAIT)) != 0) 201 panic("%s: bus_dmamap_load err=%d", 202 dev->sc_dev.dv_xname, err); 203 204 hpcdma_sglist_create(dsc, wsc->sc_dmamap); 205 wsc->sc_flags |= WDSC_DMA_MAPLOADED; 206 207 if (datain) { 208 dsc->sc_dmacmd = HPC_DMACTL_ACTIVE; 209 dsc->sc_flags |= HPCDMA_READ; 210 } else { 211 dsc->sc_dmacmd = HPC_DMACTL_ACTIVE | HPC_DMACTL_DIR; 212 dsc->sc_flags &= ~HPCDMA_READ; 213 } 214 } 215 return(count); 216 } 217 218 /* 219 * Prime the hardware for the next DMA transfer 220 */ 221 int 222 wdsc_dmago(dev) 223 struct wd33c93_softc *dev; 224 { 225 struct wdsc_softc *wsc = (void *)dev; 226 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 227 228 if (dsc->sc_dlen == 0) 229 return(0); 230 231 KASSERT((wsc->sc_flags & WDSC_DMA_ACTIVE) == 0); 232 KASSERT((wsc->sc_flags & WDSC_DMA_MAPLOADED)); 233 234 wsc->sc_flags |= WDSC_DMA_ACTIVE; 235 236 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0, 237 wsc->sc_dmamap->dm_mapsize, 238 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 239 240 hpcdma_cntl(dsc, dsc->sc_dmacmd); /* Thunderbirds are go! */ 241 242 return(wsc->sc_dmamap->dm_mapsize); 243 } 244 245 /* 246 * Stop DMA and unload active DMA maps 247 */ 248 void 249 wdsc_dmastop(dev) 250 struct wd33c93_softc *dev; 251 { 252 struct wdsc_softc *wsc = (void *)dev; 253 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 254 255 if (wsc->sc_flags & WDSC_DMA_ACTIVE) { 256 if (dsc->sc_flags & HPCDMA_READ) 257 hpcdma_flush(dsc); 258 hpcdma_cntl(dsc, 0); /* Stop DMA */ 259 bus_dmamap_sync(wsc->sc_dmat, wsc->sc_dmamap, 0, 260 wsc->sc_dmamap->dm_mapsize, 261 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 262 } 263 if (wsc->sc_flags & WDSC_DMA_MAPLOADED) 264 bus_dmamap_unload(wsc->sc_dmat, wsc->sc_dmamap); 265 wsc->sc_flags &= ~(WDSC_DMA_ACTIVE | WDSC_DMA_MAPLOADED); 266 } 267 268 /* 269 * Reset the controller. 270 */ 271 void 272 wdsc_reset(dev) 273 struct wd33c93_softc *dev; 274 { 275 struct wdsc_softc *wsc = (void *)dev; 276 struct hpc_dma_softc *dsc = &wsc->sc_hpcdma; 277 278 hpcdma_reset(dsc); 279 } 280 281 /* 282 * WD33c93 SCSI controller interrupt 283 */ 284 int 285 wdsc_scsiintr(arg) 286 void *arg; 287 { 288 struct wd33c93_softc *dev = arg; 289 struct wdsc_softc *wsc = arg; 290 int found; 291 292 found = wd33c93_intr(dev); 293 if (found) 294 wsc->sc_intrcnt.ev_count++; 295 return(found); 296 } 297
Indexes created Wed Sep 24 05:09:52 GMT 2025