1 /* $NetBSD: mba.c,v 1.35 2005/12/11 12:19:35 christos 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/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: mba.c,v 1.35 2005/12/11 12:19:35 christos Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/device.h> 46 #include <sys/queue.h> 47 #include <sys/buf.h> 48 #include <sys/bufq.h> 49 #include <sys/proc.h> 50 51 #include <uvm/uvm_extern.h> 52 53 #include <machine/bus.h> 54 #include <machine/scb.h> 55 #include <machine/nexus.h> 56 #include <machine/pte.h> 57 #include <machine/pcb.h> 58 #include <machine/sid.h> 59 #include <machine/cpu.h> 60 61 #include <vax/mba/mbareg.h> 62 #include <vax/mba/mbavar.h> 63 64 #include "locators.h" 65 66 struct mbaunit mbaunit[] = { 67 {MBADT_RP04, "rp04", MB_RP}, 68 {MBADT_RP05, "rp05", MB_RP}, 69 {MBADT_RP06, "rp06", MB_RP}, 70 {MBADT_RP07, "rp07", MB_RP}, 71 {MBADT_RM02, "rm02", MB_RP}, 72 {MBADT_RM03, "rm03", MB_RP}, 73 {MBADT_RM05, "rm05", MB_RP}, 74 {MBADT_RM80, "rm80", MB_RP}, 75 {0, 0, 0} 76 }; 77 78 int mbamatch(struct device *, struct cfdata *, void *); 79 void mbaattach(struct device *, struct device *, void *); 80 void mbaintr(void *); 81 int mbaprint(void *, const char *); 82 void mbaqueue(struct mba_device *); 83 void mbastart(struct mba_softc *); 84 void mbamapregs(struct mba_softc *); 85 86 CFATTACH_DECL(mba_cmi, sizeof(struct mba_softc), 87 mbamatch, mbaattach, NULL, NULL); 88 89 CFATTACH_DECL(mba_sbi, sizeof(struct mba_softc), 90 mbamatch, mbaattach, NULL, NULL); 91 92 #define MBA_WCSR(reg, val) \ 93 bus_space_write_4(sc->sc_iot, sc->sc_ioh, (reg), (val)) 94 #define MBA_RCSR(reg) \ 95 bus_space_read_4(sc->sc_iot, sc->sc_ioh, (reg)) 96 97 /* 98 * Look if this is a massbuss adapter. 99 */ 100 int 101 mbamatch(struct device *parent, struct cfdata *cf, void *aux) 102 { 103 struct sbi_attach_args *sa = (struct sbi_attach_args *)aux; 104 105 if (vax_cputype == VAX_750) { 106 if (cf->cf_loc[CMICF_TR] != CMICF_TR_DEFAULT && 107 cf->cf_loc[CMICF_TR] != sa->sa_nexnum) 108 return 0; 109 } else { 110 if (cf->cf_loc[SBICF_TR] != SBICF_TR_DEFAULT && 111 cf->cf_loc[SBICF_TR] != sa->sa_nexnum) 112 return 0; 113 } 114 115 if (sa->sa_type == NEX_MBA) 116 return 1; 117 118 return 0; 119 } 120 121 /* 122 * Attach the found massbuss adapter. Setup its interrupt vectors, 123 * reset it and go searching for drives on it. 124 */ 125 void 126 mbaattach(struct device *parent, struct device *self, void *aux) 127 { 128 struct mba_softc *sc = (void *)self; 129 struct sbi_attach_args *sa = (struct sbi_attach_args *)aux; 130 struct mba_attach_args ma; 131 int i, j; 132 133 printf("\n"); 134 sc->sc_iot = sa->sa_iot; 135 sc->sc_ioh = sa->sa_ioh; 136 /* 137 * Set up interrupt vectors for this MBA. 138 */ 139 for (i = 0x14; i < 0x18; i++) 140 scb_vecalloc(vecnum(0, i, sa->sa_nexnum), 141 mbaintr, sc, SCB_ISTACK, &sc->sc_intrcnt); 142 evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 143 self->dv_xname, "intr"); 144 145 sc->sc_first = 0; 146 sc->sc_last = (void *)&sc->sc_first; 147 MBA_WCSR(MBA_CR, MBACR_INIT); /* Reset adapter */ 148 MBA_WCSR(MBA_CR, MBACR_IE); /* Enable interrupts */ 149 150 for (i = 0; i < MAXMBADEV; i++) { 151 sc->sc_state = SC_AUTOCONF; 152 if ((MBA_RCSR(MUREG(i, MU_DS)) & MBADS_DPR) == 0) 153 continue; 154 /* We have a drive, ok. */ 155 ma.ma_unit = i; 156 ma.ma_type = MBA_RCSR(MUREG(i, MU_DT)) & 0777; 157 j = 0; 158 while (mbaunit[j++].nr) 159 if (mbaunit[j].nr == ma.ma_type) 160 break; 161 ma.ma_devtyp = mbaunit[j].devtyp; 162 ma.ma_name = mbaunit[j].name; 163 ma.ma_iot = sc->sc_iot; 164 ma.ma_ioh = sc->sc_ioh + MUREG(i, 0); 165 config_found(&sc->sc_dev, (void *)&ma, mbaprint); 166 } 167 } 168 169 /* 170 * We got an interrupt. Check type of interrupt and call the specific 171 * device interrupt handling routine. 172 */ 173 void 174 mbaintr(void *mba) 175 { 176 struct mba_softc *sc = mba; 177 struct mba_device *md; 178 struct buf *bp; 179 int itype, attn, anr; 180 181 itype = MBA_RCSR(MBA_SR); 182 MBA_WCSR(MBA_SR, itype); 183 184 attn = MBA_RCSR(MUREG(0, MU_AS)) & 0xff; 185 MBA_WCSR(MUREG(0, MU_AS), attn); 186 187 if (sc->sc_state == SC_AUTOCONF) 188 return; /* During autoconfig */ 189 190 md = sc->sc_first; 191 bp = BUFQ_PEEK(md->md_q); 192 /* 193 * A data-transfer interrupt. Current operation is finished, 194 * call that device's finish routine to see what to do next. 195 */ 196 if (sc->sc_state == SC_ACTIVE) { 197 198 sc->sc_state = SC_IDLE; 199 switch ((*md->md_finish)(md, itype, &attn)) { 200 201 case XFER_FINISH: 202 /* 203 * Transfer is finished. Take buffer of drive 204 * queue, and take drive of adapter queue. 205 * If more to transfer, start the adapter again 206 * by calling mbastart(). 207 */ 208 (void)BUFQ_GET(md->md_q); 209 sc->sc_first = md->md_back; 210 md->md_back = 0; 211 if (sc->sc_first == 0) 212 sc->sc_last = (void *)&sc->sc_first; 213 214 if (BUFQ_PEEK(md->md_q) != NULL) { 215 sc->sc_last->md_back = md; 216 sc->sc_last = md; 217 } 218 219 bp->b_resid = 0; 220 biodone(bp); 221 if (sc->sc_first) 222 mbastart(sc); 223 break; 224 225 case XFER_RESTART: 226 /* 227 * Something went wrong with the transfer. Try again. 228 */ 229 mbastart(sc); 230 break; 231 } 232 } 233 234 while (attn) { 235 anr = ffs(attn) - 1; 236 attn &= ~(1 << anr); 237 if (sc->sc_md[anr]->md_attn == 0) 238 panic("Should check for new MBA device %d", anr); 239 (*sc->sc_md[anr]->md_attn)(sc->sc_md[anr]); 240 } 241 } 242 243 int 244 mbaprint(void *aux, const char *mbaname) 245 { 246 struct mba_attach_args *ma = aux; 247 248 if (mbaname) { 249 if (ma->ma_name) 250 aprint_normal("%s", ma->ma_name); 251 else 252 aprint_normal("device type %o", ma->ma_type); 253 aprint_normal(" at %s", mbaname); 254 } 255 aprint_normal(" drive %d", ma->ma_unit); 256 return (ma->ma_name ? UNCONF : UNSUPP); 257 } 258 259 /* 260 * A device calls mbaqueue() when it wants to get on the adapter queue. 261 * Called at splbio(). If the adapter is inactive, start it. 262 */ 263 void 264 mbaqueue(struct mba_device *md) 265 { 266 struct mba_softc *sc = md->md_mba; 267 int i = (int)sc->sc_first; 268 269 sc->sc_last->md_back = md; 270 sc->sc_last = md; 271 272 if (i == 0) 273 mbastart(sc); 274 } 275 276 /* 277 * Start activity on (idling) adapter. Calls mbamapregs() to setup 278 * for DMA transfer, then the unit-specific start routine. 279 */ 280 void 281 mbastart(struct mba_softc *sc) 282 { 283 struct mba_device *md = sc->sc_first; 284 struct buf *bp = BUFQ_PEEK(md->md_q); 285 286 disk_reallymapin(bp, (void *)(sc->sc_ioh + MAPREG(0)), 0, PG_V); 287 288 sc->sc_state = SC_ACTIVE; 289 MBA_WCSR(MBA_VAR, ((u_int)bp->b_data & VAX_PGOFSET)); 290 MBA_WCSR(MBA_BC, (~bp->b_bcount) + 1); 291 (*md->md_start)(md); /* machine-dependent start */ 292 } 293