1 /* $NetBSD: mba.c,v 1.25 2000/07/10 09:14:32 ragge Exp $ */ 2 /* 3 * Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed at Ludd, University of 17 * Lule}, Sweden and its contributors. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Simple massbus drive routine. 35 * TODO: 36 * Autoconfig new devices 'on the fly'. 37 * More intelligent way to handle different interrupts. 38 */ 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/device.h> 43 #include <sys/queue.h> 44 #include <sys/buf.h> 45 #include <sys/proc.h> 46 47 #include <uvm/uvm_extern.h> 48 49 #include <machine/bus.h> 50 #include <machine/scb.h> 51 #include <machine/nexus.h> 52 #include <machine/pte.h> 53 #include <machine/pcb.h> 54 #include <machine/sid.h> 55 #include <machine/cpu.h> 56 57 #include <vax/mba/mbareg.h> 58 #include <vax/mba/mbavar.h> 59 60 #include "locators.h" 61 62 struct mbaunit mbaunit[] = { 63 {MBADT_RP04, "rp04", MB_RP}, 64 {MBADT_RP05, "rp05", MB_RP}, 65 {MBADT_RP06, "rp06", MB_RP}, 66 {MBADT_RP07, "rp07", MB_RP}, 67 {MBADT_RM02, "rm02", MB_RP}, 68 {MBADT_RM03, "rm03", MB_RP}, 69 {MBADT_RM05, "rm05", MB_RP}, 70 {MBADT_RM80, "rm80", MB_RP}, 71 {0, 0, 0} 72 }; 73 74 int mbamatch(struct device *, struct cfdata *, void *); 75 void mbaattach(struct device *, struct device *, void *); 76 void mbaintr(void *); 77 int mbaprint(void *, const char *); 78 void mbaqueue(struct mba_device *); 79 void mbastart(struct mba_softc *); 80 void mbamapregs(struct mba_softc *); 81 82 struct cfattach mba_cmi_ca = { 83 sizeof(struct mba_softc), mbamatch, mbaattach 84 }; 85 86 struct cfattach mba_sbi_ca = { 87 sizeof(struct mba_softc), mbamatch, mbaattach 88 }; 89 90 #define MBA_WCSR(reg, val) \ 91 bus_space_write_4(sc->sc_iot, sc->sc_ioh, (reg), (val)) 92 #define MBA_RCSR(reg) \ 93 bus_space_read_4(sc->sc_iot, sc->sc_ioh, (reg)) 94 95 /* 96 * Look if this is a massbuss adapter. 97 */ 98 int 99 mbamatch(struct device *parent, struct cfdata *cf, void *aux) 100 { 101 struct sbi_attach_args *sa = (struct sbi_attach_args *)aux; 102 103 if (vax_cputype == VAX_750) { 104 if (cf->cf_loc[CMICF_TR] != CMICF_TR_DEFAULT && 105 cf->cf_loc[CMICF_TR] != sa->sa_nexnum) 106 return 0; 107 } else { 108 if (cf->cf_loc[SBICF_TR] != SBICF_TR_DEFAULT && 109 cf->cf_loc[SBICF_TR] != sa->sa_nexnum) 110 return 0; 111 } 112 113 if (sa->sa_type == NEX_MBA) 114 return 1; 115 116 return 0; 117 } 118 119 /* 120 * Attach the found massbuss adapter. Setup its interrupt vectors, 121 * reset it and go searching for drives on it. 122 */ 123 void 124 mbaattach(struct device *parent, struct device *self, void *aux) 125 { 126 struct mba_softc *sc = (void *)self; 127 struct sbi_attach_args *sa = (struct sbi_attach_args *)aux; 128 struct mba_attach_args ma; 129 int i, j; 130 131 printf("\n"); 132 sc->sc_iot = sa->sa_iot; 133 sc->sc_ioh = sa->sa_ioh; 134 /* 135 * Set up interrupt vectors for this MBA. 136 */ 137 for (i = 0x14; i < 0x18; i++) 138 scb_vecalloc(vecnum(0, i, sa->sa_nexnum), 139 mbaintr, sc, SCB_ISTACK, &sc->sc_intrcnt); 140 evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 141 self->dv_xname, "intr"); 142 143 sc->sc_first = 0; 144 sc->sc_last = (void *)&sc->sc_first; 145 MBA_WCSR(MBA_CR, MBACR_INIT); /* Reset adapter */ 146 MBA_WCSR(MBA_CR, MBACR_IE); /* Enable interrupts */ 147 148 for (i = 0; i < MAXMBADEV; i++) { 149 sc->sc_state = SC_AUTOCONF; 150 if ((MBA_RCSR(MUREG(i, MU_DS)) & MBADS_DPR) == 0) 151 continue; 152 /* We have a drive, ok. */ 153 ma.ma_unit = i; 154 ma.ma_type = MBA_RCSR(MUREG(i, MU_DT)) & 0777; 155 j = 0; 156 while (mbaunit[j++].nr) 157 if (mbaunit[j].nr == ma.ma_type) 158 break; 159 ma.ma_devtyp = mbaunit[j].devtyp; 160 ma.ma_name = mbaunit[j].name; 161 ma.ma_iot = sc->sc_iot; 162 ma.ma_ioh = sc->sc_ioh + MUREG(i, 0); 163 config_found(&sc->sc_dev, (void *)&ma, mbaprint); 164 } 165 } 166 167 /* 168 * We got an interrupt. Check type of interrupt and call the specific 169 * device interrupt handling routine. 170 */ 171 void 172 mbaintr(void *mba) 173 { 174 struct mba_softc *sc = mba; 175 struct mba_device *md; 176 struct buf *bp; 177 int itype, attn, anr; 178 179 itype = MBA_RCSR(MBA_SR); 180 MBA_WCSR(MBA_SR, itype); 181 182 attn = MBA_RCSR(MUREG(0, MU_AS)) & 0xff; 183 MBA_WCSR(MUREG(0, MU_AS), attn); 184 185 if (sc->sc_state == SC_AUTOCONF) 186 return; /* During autoconfig */ 187 188 md = sc->sc_first; 189 bp = BUFQ_FIRST(&md->md_q); 190 /* 191 * A data-transfer interrupt. Current operation is finished, 192 * call that device's finish routine to see what to do next. 193 */ 194 if (sc->sc_state == SC_ACTIVE) { 195 196 sc->sc_state = SC_IDLE; 197 switch ((*md->md_finish)(md, itype, &attn)) { 198 199 case XFER_FINISH: 200 /* 201 * Transfer is finished. Take buffer of drive 202 * queue, and take drive of adapter queue. 203 * If more to transfer, start the adapter again 204 * by calling mbastart(). 205 */ 206 BUFQ_REMOVE(&md->md_q, bp); 207 sc->sc_first = md->md_back; 208 md->md_back = 0; 209 if (sc->sc_first == 0) 210 sc->sc_last = (void *)&sc->sc_first; 211 212 if (BUFQ_FIRST(&md->md_q) != NULL) { 213 sc->sc_last->md_back = md; 214 sc->sc_last = md; 215 } 216 217 bp->b_resid = 0; 218 biodone(bp); 219 if (sc->sc_first) 220 mbastart(sc); 221 break; 222 223 case XFER_RESTART: 224 /* 225 * Something went wrong with the transfer. Try again. 226 */ 227 mbastart(sc); 228 break; 229 } 230 } 231 232 while (attn) { 233 anr = ffs(attn) - 1; 234 attn &= ~(1 << anr); 235 if (sc->sc_md[anr]->md_attn == 0) 236 panic("Should check for new MBA device %d", anr); 237 (*sc->sc_md[anr]->md_attn)(sc->sc_md[anr]); 238 } 239 } 240 241 int 242 mbaprint(void *aux, const char *mbaname) 243 { 244 struct mba_attach_args *ma = aux; 245 246 if (mbaname) { 247 if (ma->ma_name) 248 printf("%s", ma->ma_name); 249 else 250 printf("device type %o", ma->ma_type); 251 printf(" at %s", mbaname); 252 } 253 printf(" drive %d", ma->ma_unit); 254 return (ma->ma_name ? UNCONF : UNSUPP); 255 } 256 257 /* 258 * A device calls mbaqueue() when it wants to get on the adapter queue. 259 * Called at splbio(). If the adapter is inactive, start it. 260 */ 261 void 262 mbaqueue(struct mba_device *md) 263 { 264 struct mba_softc *sc = md->md_mba; 265 int i = (int)sc->sc_first; 266 267 sc->sc_last->md_back = md; 268 sc->sc_last = md; 269 270 if (i == 0) 271 mbastart(sc); 272 } 273 274 /* 275 * Start activity on (idling) adapter. Calls mbamapregs() to setup 276 * for dma transfer, then the unit-specific start routine. 277 */ 278 void 279 mbastart(struct mba_softc *sc) 280 { 281 struct mba_device *md = sc->sc_first; 282 struct buf *bp = BUFQ_FIRST(&md->md_q); 283 284 disk_reallymapin(bp, (void *)(sc->sc_ioh + MAPREG(0)), 0, PG_V); 285 286 sc->sc_state = SC_ACTIVE; 287 MBA_WCSR(MBA_VAR, ((u_int)bp->b_data & VAX_PGOFSET)); 288 MBA_WCSR(MBA_BC, (~bp->b_bcount) + 1); 289 (*md->md_start)(md); /* machine-dependent start */ 290 } 291