Annotation of sys/arch/vax/qbus/uba.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: uba.c,v 1.11 2005/11/24 04:52:26 brad Exp $ */
! 2: /* $NetBSD: uba.c,v 1.57 2001/04/26 19:16:07 ragge Exp $ */
! 3: /*
! 4: * Copyright (c) 1996 Jonathan Stone.
! 5: * Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden.
! 6: * Copyright (c) 1982, 1986 The Regents of the University of California.
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: * 2. Redistributions in binary form must reproduce the above copyright
! 15: * notice, this list of conditions and the following disclaimer in the
! 16: * documentation and/or other materials provided with the distribution.
! 17: * 3. Neither the name of the University nor the names of its contributors
! 18: * may be used to endorse or promote products derived from this software
! 19: * without specific prior written permission.
! 20: *
! 21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 31: * SUCH DAMAGE.
! 32: *
! 33: * @(#)uba.c 7.10 (Berkeley) 12/16/90
! 34: * @(#)autoconf.c 7.20 (Berkeley) 5/9/91
! 35: */
! 36:
! 37: #include <sys/param.h>
! 38: #include <sys/types.h>
! 39: #include <sys/time.h>
! 40: #include <sys/systm.h>
! 41: #include <sys/buf.h>
! 42: #include <sys/proc.h>
! 43: #include <sys/user.h>
! 44: #include <sys/conf.h>
! 45: #include <sys/dkstat.h>
! 46: #include <sys/kernel.h>
! 47: #include <sys/malloc.h>
! 48: #include <sys/device.h>
! 49:
! 50: #include <uvm/uvm_extern.h>
! 51:
! 52: #include <machine/bus.h>
! 53: #include <machine/scb.h>
! 54: #include <machine/cpu.h>
! 55:
! 56: #include <arch/vax/qbus/ubavar.h>
! 57:
! 58: static int ubasearch (struct device *, struct cfdata *, void *);
! 59: static int ubaprint (void *, const char *);
! 60:
! 61: struct cfdriver uba_cd = {
! 62: NULL, "uba", DV_DULL
! 63: };
! 64:
! 65: /*
! 66: * If we failed to allocate uba resources, put us on a queue to wait
! 67: * until there is available resources. Resources to compete about
! 68: * are map registers and BDPs. This is normally only a problem on
! 69: * Unibus systems, Qbus systems have more map registers than usable.
! 70: */
! 71: void
! 72: uba_enqueue(struct uba_unit *uu)
! 73: {
! 74: struct uba_softc *uh;
! 75: int s;
! 76:
! 77: uh = (void *)((struct device *)(uu->uu_softc))->dv_parent;
! 78:
! 79: s = splvm();
! 80: SIMPLEQ_INSERT_TAIL(&uh->uh_resq, uu, uu_resq);
! 81: splx(s);
! 82: }
! 83:
! 84: /*
! 85: * When a routine that uses resources is finished, the next device
! 86: * in queue for map registers etc is called. If it succeeds to get
! 87: * resources, call next, and next, and next...
! 88: * This routine must be called at splvm.
! 89: */
! 90: void
! 91: uba_done(struct uba_softc *uh)
! 92: {
! 93: struct uba_unit *uu;
! 94:
! 95: while ((uu = SIMPLEQ_FIRST(&uh->uh_resq))) {
! 96: SIMPLEQ_REMOVE_HEAD(&uh->uh_resq, uu_resq);
! 97: if ((*uu->uu_ready)(uu) == 0) {
! 98: SIMPLEQ_INSERT_HEAD(&uh->uh_resq, uu, uu_resq);
! 99: break;
! 100: }
! 101: }
! 102: }
! 103:
! 104: /*
! 105: * Each device that needs some handling if an ubareset occurs must
! 106: * register for reset first through this routine.
! 107: */
! 108: void
! 109: uba_reset_establish(void (*reset)(struct device *), struct device *dev)
! 110: {
! 111: struct uba_softc *uh = (void *)dev->dv_parent;
! 112: struct uba_reset *ur;
! 113:
! 114: ur = malloc(sizeof(struct uba_reset), M_DEVBUF, M_NOWAIT);
! 115: if (ur == NULL)
! 116: panic("uba_reset_establish");
! 117: ur->ur_dev = dev;
! 118: ur->ur_reset = reset;
! 119:
! 120: SIMPLEQ_INSERT_TAIL(&uh->uh_resetq, ur, ur_resetq);
! 121: }
! 122:
! 123: /*
! 124: * Allocate a bunch of map registers and map them to the given address.
! 125: */
! 126: int
! 127: uballoc(struct uba_softc *uh, struct ubinfo *ui, int flags)
! 128: {
! 129: int waitok = (flags & UBA_CANTWAIT) == 0;
! 130: int error;
! 131:
! 132: if ((error = bus_dmamap_create(uh->uh_dmat, ui->ui_size, 1,
! 133: ui->ui_size, 0, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT),
! 134: &ui->ui_dmam)))
! 135: return error;
! 136:
! 137: if ((error = bus_dmamap_load(uh->uh_dmat, ui->ui_dmam, ui->ui_vaddr,
! 138: ui->ui_size, NULL, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT)))) {
! 139: bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam);
! 140: return error;
! 141: }
! 142: ui->ui_baddr = ui->ui_dmam->dm_segs[0].ds_addr;
! 143: return 0;
! 144: }
! 145:
! 146: /*
! 147: * Allocate DMA-able memory and map it on the unibus.
! 148: */
! 149: int
! 150: ubmemalloc(struct uba_softc *uh, struct ubinfo *ui, int flags)
! 151: {
! 152: int waitok = (flags & UBA_CANTWAIT ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK);
! 153: int error;
! 154:
! 155: if ((error = bus_dmamem_alloc(uh->uh_dmat, ui->ui_size, NBPG, 0,
! 156: &ui->ui_seg, 1, &ui->ui_rseg, waitok)))
! 157: return error;
! 158: if ((error = bus_dmamem_map(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg,
! 159: ui->ui_size, &ui->ui_vaddr, waitok|BUS_DMA_COHERENT))) {
! 160: bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg);
! 161: return error;
! 162: }
! 163: if ((error = uballoc(uh, ui, flags))) {
! 164: bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size);
! 165: bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg);
! 166: }
! 167: return error;
! 168: }
! 169:
! 170: void
! 171: ubfree(struct uba_softc *uh, struct ubinfo *ui)
! 172: {
! 173: bus_dmamap_unload(uh->uh_dmat, ui->ui_dmam);
! 174: bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam);
! 175: }
! 176:
! 177: void
! 178: ubmemfree(struct uba_softc *uh, struct ubinfo *ui)
! 179: {
! 180: bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size);
! 181: bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg);
! 182: ubfree(uh, ui);
! 183: }
! 184:
! 185: /*
! 186: * Generate a reset on uba number uban. Then
! 187: * call each device that asked to be called during attach,
! 188: * giving it a chance to clean up so as to be able to continue.
! 189: */
! 190: void
! 191: ubareset(struct uba_softc *uh)
! 192: {
! 193: struct uba_reset *ur;
! 194: int s;
! 195:
! 196: s = splvm();
! 197: SIMPLEQ_INIT(&uh->uh_resq);
! 198: printf("%s: reset", uh->uh_dev.dv_xname);
! 199: (*uh->uh_ubainit)(uh);
! 200:
! 201: ur = SIMPLEQ_FIRST(&uh->uh_resetq);
! 202: if (ur) do {
! 203: printf(" %s", ur->ur_dev->dv_xname);
! 204: (*ur->ur_reset)(ur->ur_dev);
! 205: } while ((ur = SIMPLEQ_NEXT(ur, ur_resetq)));
! 206:
! 207: printf("\n");
! 208: splx(s);
! 209: }
! 210:
! 211: /*
! 212: * The common attach routine:
! 213: * Calls the scan routine to search for uba devices.
! 214: */
! 215: void
! 216: uba_attach(struct uba_softc *sc, paddr_t iopagephys)
! 217: {
! 218:
! 219: /*
! 220: * Set last free interrupt vector for devices with
! 221: * programmable interrupt vectors. Use is to decrement
! 222: * this number and use result as interrupt vector.
! 223: */
! 224: sc->uh_lastiv = 0x200;
! 225: SIMPLEQ_INIT(&sc->uh_resq);
! 226: SIMPLEQ_INIT(&sc->uh_resetq);
! 227:
! 228: /*
! 229: * Allocate place for unibus I/O space in virtual space.
! 230: */
! 231: if (bus_space_map(sc->uh_iot, iopagephys, UBAIOSIZE, 0, &sc->uh_ioh))
! 232: return;
! 233:
! 234: if (sc->uh_beforescan)
! 235: (*sc->uh_beforescan)(sc);
! 236: /*
! 237: * Now start searching for devices.
! 238: */
! 239: config_search((cfmatch_t)ubasearch,(struct device *)sc, NULL);
! 240:
! 241: if (sc->uh_afterscan)
! 242: (*sc->uh_afterscan)(sc);
! 243: }
! 244:
! 245: int
! 246: ubasearch(struct device *parent, struct cfdata *cf, void *aux)
! 247: {
! 248: struct uba_softc *sc = (struct uba_softc *)parent;
! 249: struct uba_attach_args ua;
! 250: int i, vec, br;
! 251:
! 252: ua.ua_ioh = ubdevreg(cf->cf_loc[0]) + sc->uh_ioh;
! 253: ua.ua_iot = sc->uh_iot;
! 254: ua.ua_dmat = sc->uh_dmat;
! 255:
! 256: if (badaddr((caddr_t)ua.ua_ioh, 2) ||
! 257: (sc->uh_errchk ? (*sc->uh_errchk)(sc):0))
! 258: goto forgetit;
! 259:
! 260: scb_vecref(0, 0); /* Clear vector ref */
! 261: i = (*cf->cf_attach->ca_match) (parent, cf, &ua);
! 262:
! 263: if (sc->uh_errchk)
! 264: if ((*sc->uh_errchk)(sc))
! 265: goto forgetit;
! 266: if (i == 0)
! 267: goto forgetit;
! 268:
! 269: i = scb_vecref(&vec, &br);
! 270: if (i == 0)
! 271: goto fail;
! 272: if (vec == 0)
! 273: goto fail;
! 274:
! 275: ua.ua_br = br;
! 276: ua.ua_cvec = vec;
! 277: ua.ua_iaddr = cf->cf_loc[0];
! 278:
! 279: config_attach(parent, cf, &ua, ubaprint);
! 280: return 0;
! 281:
! 282: fail:
! 283: printf("%s%d at %s csr %o %s\n",
! 284: cf->cf_driver->cd_name, cf->cf_unit, parent->dv_xname,
! 285: cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt"));
! 286:
! 287: forgetit:
! 288: return 0;
! 289: }
! 290:
! 291: /*
! 292: * Print out some interesting info common to all unibus devices.
! 293: */
! 294: int
! 295: ubaprint(void *aux, const char *uba)
! 296: {
! 297: struct uba_attach_args *ua = aux;
! 298:
! 299: printf(" csr %o vec %d ipl %x", ua->ua_iaddr,
! 300: ua->ua_cvec & 511, ua->ua_br);
! 301: return UNCONF;
! 302: }
! 303:
! 304: /*
! 305: * Move to machdep eventually
! 306: */
! 307: void
! 308: uba_intr_establish(icookie, vec, ifunc, iarg, ev)
! 309: void *icookie;
! 310: int vec;
! 311: void (*ifunc)(void *iarg);
! 312: void *iarg;
! 313: struct evcount *ev;
! 314: {
! 315: scb_vecalloc(vec, ifunc, iarg, SCB_ISTACK, ev);
! 316: }
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