sys/dev/qbus/uba.c

   1 /*      $NetBSD: uba.c,v 1.77 2008/03/11 05:34:02 matt Exp $       */
   2 /*
   3  * Copyright (c) 1982, 1986 The Regents of the University of California.
   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. Neither the name of the University nor the names of its contributors
  15  *    may be used to endorse or promote products derived from this software
  16  *    without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  *      @(#)uba.c       7.10 (Berkeley) 12/16/90
  31  *      @(#)autoconf.c  7.20 (Berkeley) 5/9/91
  32  */
  33
  34 /*
  35  * Copyright (c) 1996 Jonathan Stone.
  36  * Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden.
  37  * All rights reserved.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in the
  46  *    documentation and/or other materials provided with the distribution.
  47  * 3. All advertising materials mentioning features or use of this software
  48  *    must display the following acknowledgement:
  49  *      This product includes software developed by the University of
  50  *      California, Berkeley and its contributors.
  51  * 4. Neither the name of the University nor the names of its contributors
  52  *    may be used to endorse or promote products derived from this software
  53  *    without specific prior written permission.
  54  *
  55  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  56  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  57  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  58  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  59  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  60  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  61  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  62  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  63  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  64  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  65  * SUCH DAMAGE.
  66  *
  67  *      @(#)uba.c       7.10 (Berkeley) 12/16/90
  68  *      @(#)autoconf.c  7.20 (Berkeley) 5/9/91
  69  */
  70
  71 #include <sys/cdefs.h>
  72 __KERNEL_RCSID(0, "$NetBSD: uba.c,v 1.77 2008/03/11 05:34:02 matt Exp $");
  73
  74 #include <sys/param.h>
  75 #include <sys/time.h>
  76 #include <sys/systm.h>
  77 #include <sys/buf.h>
  78 #include <sys/proc.h>
  79 #include <sys/conf.h>
  80 #include <sys/kernel.h>
  81 #include <sys/malloc.h>
  82 #include <sys/device.h>
  83
  84 #include <uvm/uvm_extern.h>
  85
  86 #include <sys/bus.h>
  87 #include <machine/scb.h>
  88 #include <sys/cpu.h>
  89
  90 #include <dev/qbus/ubareg.h>
  91 #include <dev/qbus/ubavar.h>
  92
  93 #include "ioconf.h"
  94 #include "locators.h"
  95
  96 static int ubasearch (device_t, cfdata_t,
  97                       const int *, void *);
  98 static int ubaprint (void *, const char *);
  99
 100 /*
 101  * If we failed to allocate uba resources, put us on a queue to wait
 102  * until there is available resources. Resources to compete about
 103  * are map registers and BDPs. This is normally only a problem on
 104  * Unibus systems, Qbus systems have more map registers than usable.
 105  */
 106 void
 107 uba_enqueue(struct uba_unit *uu)
 108 {
 109         struct uba_softc *uh;
 110         int s;
 111
 112         uh = device_private(device_parent(uu->uu_dev));
 113
 114         s = spluba();
 115         SIMPLEQ_INSERT_TAIL(&uh->uh_resq, uu, uu_resq);
 116         splx(s);
 117 }
 118
 119 /*
 120  * When a routine that uses resources is finished, the next device
 121  * in queue for map registers etc is called. If it succeeds to get
 122  * resources, call next, and next, and next...
 123  * This routine must be called at spluba.
 124  */
 125 void
 126 uba_done(struct uba_softc *uh)
 127 {
 128         struct uba_unit *uu;
 129
 130         while ((uu = SIMPLEQ_FIRST(&uh->uh_resq))) {
 131                 SIMPLEQ_REMOVE_HEAD(&uh->uh_resq, uu_resq);
 132                 if ((*uu->uu_ready)(uu) == 0) {
 133                         SIMPLEQ_INSERT_HEAD(&uh->uh_resq, uu, uu_resq);
 134                         break;
 135                 }
 136         }
 137 }
 138
 139 /*
 140  * Each device that needs some handling if an ubareset occurs must
 141  * register for reset first through this routine.
 142  */
 143 void
 144 uba_reset_establish(void (*reset)(device_t), device_t dev)
 145 {
 146         struct uba_softc *uh = device_private(device_parent(dev));
 147         struct uba_reset *ur;
 148
 149         ur = malloc(sizeof(struct uba_reset), M_DEVBUF, M_NOWAIT|M_ZERO);
 150         if (ur == NULL)
 151                 panic("uba_reset_establish");
 152         ur->ur_dev = dev;
 153         ur->ur_reset = reset;
 154
 155         SIMPLEQ_INSERT_TAIL(&uh->uh_resetq, ur, ur_resetq);
 156 }
 157
 158 /*
 159  * Allocate a bunch of map registers and map them to the given address.
 160  */
 161 int
 162 uballoc(struct uba_softc *uh, struct ubinfo *ui, int flags)
 163 {
 164         int waitok = (flags & UBA_CANTWAIT) == 0;
 165         int error;
 166
 167         if ((error = bus_dmamap_create(uh->uh_dmat, ui->ui_size, 1,
 168             ui->ui_size, 0, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT),
 169             &ui->ui_dmam)))
 170                 return error;
 171
 172         if ((error = bus_dmamap_load(uh->uh_dmat, ui->ui_dmam, ui->ui_vaddr,
 173             ui->ui_size, NULL, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT)))) {
 174                 bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam);
 175                 return error;
 176         }
 177         ui->ui_baddr = ui->ui_dmam->dm_segs[0].ds_addr;
 178         return 0;
 179 }
 180
 181 /*
 182  * Allocate DMA-able memory and map it on the unibus.
 183  */
 184 int
 185 ubmemalloc(struct uba_softc *uh, struct ubinfo *ui, int flags)
 186 {
 187         int waitok = (flags & UBA_CANTWAIT ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK);
 188         int error;
 189
 190         if ((error = bus_dmamem_alloc(uh->uh_dmat, ui->ui_size, PAGE_SIZE, 0,
 191             &ui->ui_seg, 1, &ui->ui_rseg, waitok)))
 192                 return error;
 193         if ((error = bus_dmamem_map(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg,
 194             ui->ui_size, &ui->ui_vaddr, waitok|BUS_DMA_COHERENT))) {
 195                 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg);
 196                 return error;
 197         }
 198         if ((error = uballoc(uh, ui, flags))) {
 199                 bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size);
 200                 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg);
 201         }
 202         return error;
 203 }
 204
 205 void
 206 ubfree(struct uba_softc *uh, struct ubinfo *ui)
 207 {
 208         bus_dmamap_unload(uh->uh_dmat, ui->ui_dmam);
 209         bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam);
 210 }
 211
 212 void
 213 ubmemfree(struct uba_softc *uh, struct ubinfo *ui)
 214 {
 215         bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size);
 216         bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg);
 217         ubfree(uh, ui);
 218 }
 219
 220 /*
 221  * Generate a reset on uba number uban.  Then
 222  * call each device that asked to be called during attach,
 223  * giving it a chance to clean up so as to be able to continue.
 224  */
 225 void
 226 ubareset(struct uba_softc *uh)
 227 {
 228         struct uba_reset *ur;
 229         int s;
 230
 231         s = spluba();
 232         SIMPLEQ_INIT(&uh->uh_resq);
 233         printf("%s: reset", device_xname(uh->uh_dev));
 234         (*uh->uh_ubainit)(uh);
 235
 236         ur = SIMPLEQ_FIRST(&uh->uh_resetq);
 237         if (ur) do {
 238                 printf(" %s", device_xname(ur->ur_dev));
 239                 (*ur->ur_reset)(ur->ur_dev);
 240         } while ((ur = SIMPLEQ_NEXT(ur, ur_resetq)));
 241
 242         printf("\n");
 243         splx(s);
 244 }
 245
 246 /*
 247  * The common attach routine:
 248  *   Calls the scan routine to search for uba devices.
 249  */
 250 void
 251 uba_attach(struct uba_softc *sc, paddr_t iopagephys)
 252 {
 253
 254         /*
 255          * Set last free interrupt vector for devices with
 256          * programmable interrupt vectors.  Use is to decrement
 257          * this number and use result as interrupt vector.
 258          */
 259         sc->uh_lastiv = 0x200;
 260         SIMPLEQ_INIT(&sc->uh_resq);
 261         SIMPLEQ_INIT(&sc->uh_resetq);
 262
 263         /*
 264          * Allocate place for unibus I/O space in virtual space.
 265          */
 266         if (bus_space_map(sc->uh_iot, iopagephys, UBAIOSIZE, 0, &sc->uh_ioh))
 267                 return;
 268
 269         /*
 270          * Keep track of which addressed devices are found.
 271          */
 272         sc->uh_used = malloc(UBAIOSIZE, M_TEMP, M_WAITOK);
 273         memset(sc->uh_used, 0, UBAIOSIZE);
 274
 275         if (sc->uh_beforescan)
 276                 (*sc->uh_beforescan)(sc);
 277         /*
 278          * Now start searching for devices.
 279          */
 280         config_search_ia(ubasearch, sc->uh_dev, "uba", NULL);
 281
 282         if (sc->uh_afterscan)
 283                 (*sc->uh_afterscan)(sc);
 284
 285         free(sc->uh_used, M_TEMP);
 286 }
 287
 288 int
 289 ubasearch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
 290 {
 291         struct  uba_softc *sc = device_private(parent);
 292         struct  uba_attach_args ua;
 293         int     i, csr, vec, br;
 294
 295         csr = cf->cf_loc[UBACF_CSR];
 296         if (sc->uh_used[ubdevreg(csr)])
 297                 return 0; /* something are already at this address */
 298
 299         ua.ua_ioh = ubdevreg(csr) + sc->uh_ioh;
 300         ua.ua_iot = sc->uh_iot;
 301         ua.ua_dmat = sc->uh_dmat;
 302
 303         if (badaddr((void *)ua.ua_ioh, 2) ||
 304             (sc->uh_errchk ? (*sc->uh_errchk)(sc):0))
 305                 goto forgetit;
 306
 307         scb_vecref(0, 0); /* Clear vector ref */
 308         i = config_match(parent, cf, &ua);
 309
 310         if (sc->uh_errchk)
 311                 if ((*sc->uh_errchk)(sc))
 312                         goto forgetit;
 313         if (i == 0)
 314                 goto forgetit;
 315
 316         i = scb_vecref(&vec, &br);
 317         if (i == 0)
 318                 goto fail;
 319         if (vec == 0)
 320                 goto fail;
 321
 322         ua.ua_br = br;
 323         ua.ua_cvec = vec;
 324         ua.ua_iaddr = csr;
 325         ua.ua_evcnt = NULL;
 326
 327         sc->uh_used[ubdevreg(csr)] = 1;
 328
 329         config_attach(parent, cf, &ua, ubaprint);
 330         return 0;
 331
 332 fail:
 333         printf("%s%d at %s csr %o %s\n",
 334             cf->cf_name, cf->cf_unit, device_xname(parent),
 335             csr, (i ? "zero vector" : "didn't interrupt"));
 336
 337 forgetit:
 338         return 0;
 339 }
 340
 341 /*
 342  * Print out some interesting info common to all unibus devices.
 343  */
 344 int
 345 ubaprint(void *aux, const char *uba)
 346 {
 347         struct uba_attach_args *ua = aux;
 348
 349         aprint_normal(" csr %o vec %o ipl %x", ua->ua_iaddr,
 350             ua->ua_cvec & 511, ua->ua_br);
 351         return UNCONF;
 352 }
 353
 354 /*
 355  * Move to machdep eventually
 356  */
 357 void
 358 uba_intr_establish(void *icookie, int vec, void (*ifunc)(void *iarg),
 359         void *iarg, struct evcnt *ev)
 360 {
 361         scb_vecalloc(vec, ifunc, iarg, SCB_ISTACK, ev);
 362 }