1 /* $NetBSD: uba.c,v 1.76 2007/10/19 12:01:09 ad 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 1.76 2007/10/19 12:01:09 ad 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/user.h> 80 #include <sys/conf.h> 81 #include <sys/kernel.h> 82 #include <sys/malloc.h> 83 #include <sys/device.h> 84 85 #include <uvm/uvm_extern.h> 86 87 #include <sys/bus.h> 88 #include <machine/scb.h> 89 #include <sys/cpu.h> 90 91 #include <dev/qbus/ubareg.h> 92 #include <dev/qbus/ubavar.h> 93 94 #include "ioconf.h" 95 #include "locators.h" 96 97 static int ubasearch (struct device *, struct cfdata *, 98 const int *, void *); 99 static int ubaprint (void *, const char *); 100 101 /* 102 * If we failed to allocate uba resources, put us on a queue to wait 103 * until there is available resources. Resources to compete about 104 * are map registers and BDPs. This is normally only a problem on 105 * Unibus systems, Qbus systems have more map registers than usable. 106 */ 107 void 108 uba_enqueue(struct uba_unit *uu) 109 { 110 struct uba_softc *uh; 111 int s; 112 113 uh = (void *)device_parent((struct device *)(uu->uu_softc)); 114 115 s = spluba(); 116 SIMPLEQ_INSERT_TAIL(&uh->uh_resq, uu, uu_resq); 117 splx(s); 118 } 119 120 /* 121 * When a routine that uses resources is finished, the next device 122 * in queue for map registers etc is called. If it succeeds to get 123 * resources, call next, and next, and next... 124 * This routine must be called at spluba. 125 */ 126 void 127 uba_done(struct uba_softc *uh) 128 { 129 struct uba_unit *uu; 130 131 while ((uu = SIMPLEQ_FIRST(&uh->uh_resq))) { 132 SIMPLEQ_REMOVE_HEAD(&uh->uh_resq, uu_resq); 133 if ((*uu->uu_ready)(uu) == 0) { 134 SIMPLEQ_INSERT_HEAD(&uh->uh_resq, uu, uu_resq); 135 break; 136 } 137 } 138 } 139 140 /* 141 * Each device that needs some handling if an ubareset occurs must 142 * register for reset first through this routine. 143 */ 144 void 145 uba_reset_establish(void (*reset)(struct device *), struct device *dev) 146 { 147 struct uba_softc *uh = (void *)device_parent(dev); 148 struct uba_reset *ur; 149 150 ur = malloc(sizeof(struct uba_reset), M_DEVBUF, M_NOWAIT); 151 if (ur == NULL) 152 panic("uba_reset_establish"); 153 ur->ur_dev = dev; 154 ur->ur_reset = reset; 155 156 SIMPLEQ_INSERT_TAIL(&uh->uh_resetq, ur, ur_resetq); 157 } 158 159 /* 160 * Allocate a bunch of map registers and map them to the given address. 161 */ 162 int 163 uballoc(struct uba_softc *uh, struct ubinfo *ui, int flags) 164 { 165 int waitok = (flags & UBA_CANTWAIT) == 0; 166 int error; 167 168 if ((error = bus_dmamap_create(uh->uh_dmat, ui->ui_size, 1, 169 ui->ui_size, 0, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT), 170 &ui->ui_dmam))) 171 return error; 172 173 if ((error = bus_dmamap_load(uh->uh_dmat, ui->ui_dmam, ui->ui_vaddr, 174 ui->ui_size, NULL, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT)))) { 175 bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam); 176 return error; 177 } 178 ui->ui_baddr = ui->ui_dmam->dm_segs[0].ds_addr; 179 return 0; 180 } 181 182 /* 183 * Allocate DMA-able memory and map it on the unibus. 184 */ 185 int 186 ubmemalloc(struct uba_softc *uh, struct ubinfo *ui, int flags) 187 { 188 int waitok = (flags & UBA_CANTWAIT ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK); 189 int error; 190 191 if ((error = bus_dmamem_alloc(uh->uh_dmat, ui->ui_size, PAGE_SIZE, 0, 192 &ui->ui_seg, 1, &ui->ui_rseg, waitok))) 193 return error; 194 if ((error = bus_dmamem_map(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg, 195 ui->ui_size, &ui->ui_vaddr, waitok|BUS_DMA_COHERENT))) { 196 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg); 197 return error; 198 } 199 if ((error = uballoc(uh, ui, flags))) { 200 bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size); 201 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg); 202 } 203 return error; 204 } 205 206 void 207 ubfree(struct uba_softc *uh, struct ubinfo *ui) 208 { 209 bus_dmamap_unload(uh->uh_dmat, ui->ui_dmam); 210 bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam); 211 } 212 213 void 214 ubmemfree(struct uba_softc *uh, struct ubinfo *ui) 215 { 216 bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size); 217 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg); 218 ubfree(uh, ui); 219 } 220 221 /* 222 * Generate a reset on uba number uban. Then 223 * call each device that asked to be called during attach, 224 * giving it a chance to clean up so as to be able to continue. 225 */ 226 void 227 ubareset(struct uba_softc *uh) 228 { 229 struct uba_reset *ur; 230 int s; 231 232 s = spluba(); 233 SIMPLEQ_INIT(&uh->uh_resq); 234 printf("%s: reset", uh->uh_dev.dv_xname); 235 (*uh->uh_ubainit)(uh); 236 237 ur = SIMPLEQ_FIRST(&uh->uh_resetq); 238 if (ur) do { 239 printf(" %s", ur->ur_dev->dv_xname); 240 (*ur->ur_reset)(ur->ur_dev); 241 } while ((ur = SIMPLEQ_NEXT(ur, ur_resetq))); 242 243 printf("\n"); 244 splx(s); 245 } 246 247 /* 248 * The common attach routine: 249 * Calls the scan routine to search for uba devices. 250 */ 251 void 252 uba_attach(struct uba_softc *sc, paddr_t iopagephys) 253 { 254 255 /* 256 * Set last free interrupt vector for devices with 257 * programmable interrupt vectors. Use is to decrement 258 * this number and use result as interrupt vector. 259 */ 260 sc->uh_lastiv = 0x200; 261 SIMPLEQ_INIT(&sc->uh_resq); 262 SIMPLEQ_INIT(&sc->uh_resetq); 263 264 /* 265 * Allocate place for unibus I/O space in virtual space. 266 */ 267 if (bus_space_map(sc->uh_iot, iopagephys, UBAIOSIZE, 0, &sc->uh_ioh)) 268 return; 269 270 /* 271 * Keep track of which addressed devices are found. 272 */ 273 sc->uh_used = malloc(UBAIOSIZE, M_TEMP, M_WAITOK); 274 memset(sc->uh_used, 0, UBAIOSIZE); 275 276 if (sc->uh_beforescan) 277 (*sc->uh_beforescan)(sc); 278 /* 279 * Now start searching for devices. 280 */ 281 config_search_ia(ubasearch,(struct device *)sc, "uba", NULL); 282 283 if (sc->uh_afterscan) 284 (*sc->uh_afterscan)(sc); 285 286 free(sc->uh_used, M_TEMP); 287 } 288 289 int 290 ubasearch(struct device *parent, struct cfdata *cf, 291 const int *ldesc, void *aux) 292 { 293 struct uba_softc *sc = (struct uba_softc *)parent; 294 struct uba_attach_args ua; 295 int i, csr, vec, br; 296 297 csr = cf->cf_loc[UBACF_CSR]; 298 if (sc->uh_used[ubdevreg(csr)]) 299 return 0; /* something are already at this address */ 300 301 ua.ua_ioh = ubdevreg(csr) + sc->uh_ioh; 302 ua.ua_iot = sc->uh_iot; 303 ua.ua_dmat = sc->uh_dmat; 304 305 if (badaddr((void *)ua.ua_ioh, 2) || 306 (sc->uh_errchk ? (*sc->uh_errchk)(sc):0)) 307 goto forgetit; 308 309 scb_vecref(0, 0); /* Clear vector ref */ 310 i = config_match(parent, cf, &ua); 311 312 if (sc->uh_errchk) 313 if ((*sc->uh_errchk)(sc)) 314 goto forgetit; 315 if (i == 0) 316 goto forgetit; 317 318 i = scb_vecref(&vec, &br); 319 if (i == 0) 320 goto fail; 321 if (vec == 0) 322 goto fail; 323 324 ua.ua_br = br; 325 ua.ua_cvec = vec; 326 ua.ua_iaddr = csr; 327 ua.ua_evcnt = NULL; 328 329 sc->uh_used[ubdevreg(csr)] = 1; 330 331 config_attach(parent, cf, &ua, ubaprint); 332 return 0; 333 334 fail: 335 printf("%s%d at %s csr %o %s\n", 336 cf->cf_name, cf->cf_unit, parent->dv_xname, 337 csr, (i ? "zero vector" : "didn't interrupt")); 338 339 forgetit: 340 return 0; 341 } 342 343 /* 344 * Print out some interesting info common to all unibus devices. 345 */ 346 int 347 ubaprint(void *aux, const char *uba) 348 { 349 struct uba_attach_args *ua = aux; 350 351 aprint_normal(" csr %o vec %o ipl %x", ua->ua_iaddr, 352 ua->ua_cvec & 511, ua->ua_br); 353 return UNCONF; 354 } 355 356 /* 357 * Move to machdep eventually 358 */ 359 void 360 uba_intr_establish(void *icookie, int vec, void (*ifunc)(void *iarg), 361 void *iarg, struct evcnt *ev) 362 { 363 scb_vecalloc(vec, ifunc, iarg, SCB_ISTACK, ev); 364 } 365