1 /* $NetBSD: uba.c,v 1.80 2017/05/22 17:22:29 ragge 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 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)uba.c 7.10 (Berkeley) 12/16/90 61 * @(#)autoconf.c 7.20 (Berkeley) 5/9/91 62 */ 63 64 #include <sys/cdefs.h> 65 __KERNEL_RCSID(0, "$NetBSD: uba.c,v 1.80 2017/05/22 17:22:29 ragge Exp $"); 66 67 #include <sys/param.h> 68 #include <sys/time.h> 69 #include <sys/systm.h> 70 #include <sys/buf.h> 71 #include <sys/proc.h> 72 #include <sys/conf.h> 73 #include <sys/kernel.h> 74 #include <sys/malloc.h> 75 #include <sys/device.h> 76 77 #include <sys/bus.h> 78 #include <machine/scb.h> 79 #include <sys/cpu.h> 80 81 #include <dev/qbus/ubareg.h> 82 #include <dev/qbus/ubavar.h> 83 84 #include "ioconf.h" 85 #include "locators.h" 86 87 static int ubasearch (device_t, cfdata_t, 88 const int *, void *); 89 static int ubaprint (void *, const char *); 90 91 /* 92 * If we failed to allocate uba resources, put us on a queue to wait 93 * until there is available resources. Resources to compete about 94 * are map registers and BDPs. This is normally only a problem on 95 * Unibus systems, Qbus systems have more map registers than usable. 96 */ 97 void 98 uba_enqueue(struct uba_unit *uu) 99 { 100 struct uba_softc *uh; 101 int s; 102 103 uh = device_private(device_parent(uu->uu_dev)); 104 105 s = spluba(); 106 SIMPLEQ_INSERT_TAIL(&uh->uh_resq, uu, uu_resq); 107 splx(s); 108 } 109 110 /* 111 * When a routine that uses resources is finished, the next device 112 * in queue for map registers etc is called. If it succeeds to get 113 * resources, call next, and next, and next... 114 * This routine must be called at spluba. 115 */ 116 void 117 uba_done(struct uba_softc *uh) 118 { 119 struct uba_unit *uu; 120 121 while ((uu = SIMPLEQ_FIRST(&uh->uh_resq))) { 122 SIMPLEQ_REMOVE_HEAD(&uh->uh_resq, uu_resq); 123 if ((*uu->uu_ready)(uu) == 0) { 124 SIMPLEQ_INSERT_HEAD(&uh->uh_resq, uu, uu_resq); 125 break; 126 } 127 } 128 } 129 130 /* 131 * Each device that needs some handling if an ubareset occurs must 132 * register for reset first through this routine. 133 */ 134 void 135 uba_reset_establish(void (*reset)(device_t), device_t dev) 136 { 137 struct uba_softc *uh = device_private(device_parent(dev)); 138 struct uba_reset *ur; 139 140 ur = malloc(sizeof(struct uba_reset), M_DEVBUF, M_NOWAIT|M_ZERO); 141 if (ur == NULL) 142 panic("uba_reset_establish"); 143 ur->ur_dev = dev; 144 ur->ur_reset = reset; 145 146 SIMPLEQ_INSERT_TAIL(&uh->uh_resetq, ur, ur_resetq); 147 } 148 149 /* 150 * Allocate a bunch of map registers and map them to the given address. 151 */ 152 int 153 uballoc(struct uba_softc *uh, struct ubinfo *ui, int flags) 154 { 155 int waitok = (flags & UBA_CANTWAIT) == 0; 156 int error; 157 158 if ((error = bus_dmamap_create(uh->uh_dmat, ui->ui_size, 1, 159 ui->ui_size, 0, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT), 160 &ui->ui_dmam))) 161 return error; 162 163 if ((error = bus_dmamap_load(uh->uh_dmat, ui->ui_dmam, ui->ui_vaddr, 164 ui->ui_size, NULL, (waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT)))) { 165 bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam); 166 return error; 167 } 168 ui->ui_baddr = ui->ui_dmam->dm_segs[0].ds_addr; 169 return 0; 170 } 171 172 /* 173 * Allocate DMA-able memory and map it on the unibus. 174 */ 175 int 176 ubmemalloc(struct uba_softc *uh, struct ubinfo *ui, int flags) 177 { 178 int waitok = (flags & UBA_CANTWAIT ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK); 179 int error; 180 181 if ((error = bus_dmamem_alloc(uh->uh_dmat, ui->ui_size, PAGE_SIZE, 0, 182 &ui->ui_seg, 1, &ui->ui_rseg, waitok))) 183 return error; 184 if ((error = bus_dmamem_map(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg, 185 ui->ui_size, &ui->ui_vaddr, waitok|BUS_DMA_COHERENT))) { 186 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg); 187 return error; 188 } 189 if ((error = uballoc(uh, ui, flags))) { 190 bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size); 191 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg); 192 } 193 return error; 194 } 195 196 void 197 ubfree(struct uba_softc *uh, struct ubinfo *ui) 198 { 199 bus_dmamap_unload(uh->uh_dmat, ui->ui_dmam); 200 bus_dmamap_destroy(uh->uh_dmat, ui->ui_dmam); 201 } 202 203 void 204 ubmemfree(struct uba_softc *uh, struct ubinfo *ui) 205 { 206 bus_dmamem_unmap(uh->uh_dmat, ui->ui_vaddr, ui->ui_size); 207 bus_dmamem_free(uh->uh_dmat, &ui->ui_seg, ui->ui_rseg); 208 ubfree(uh, ui); 209 } 210 211 /* 212 * Generate a reset on uba number uban. Then 213 * call each device that asked to be called during attach, 214 * giving it a chance to clean up so as to be able to continue. 215 */ 216 void 217 ubareset(struct uba_softc *uh) 218 { 219 struct uba_reset *ur; 220 int s; 221 222 s = spluba(); 223 SIMPLEQ_INIT(&uh->uh_resq); 224 printf("%s: reset", device_xname(uh->uh_dev)); 225 (*uh->uh_ubainit)(uh); 226 227 ur = SIMPLEQ_FIRST(&uh->uh_resetq); 228 if (ur) do { 229 printf(" %s", device_xname(ur->ur_dev)); 230 (*ur->ur_reset)(ur->ur_dev); 231 } while ((ur = SIMPLEQ_NEXT(ur, ur_resetq))); 232 233 printf("\n"); 234 splx(s); 235 } 236 237 /* 238 * The common attach routine: 239 * Calls the scan routine to search for uba devices. 240 */ 241 void 242 uba_attach(struct uba_softc *sc, paddr_t iopagephys) 243 { 244 245 /* 246 * Set last free interrupt vector for devices with 247 * programmable interrupt vectors. Use is to decrement 248 * this number and use result as interrupt vector. 249 */ 250 sc->uh_lastiv = 0x200; 251 SIMPLEQ_INIT(&sc->uh_resq); 252 SIMPLEQ_INIT(&sc->uh_resetq); 253 254 /* 255 * Allocate place for unibus I/O space in virtual space. 256 */ 257 if (bus_space_map(sc->uh_iot, iopagephys, UBAIOSIZE, 0, &sc->uh_ioh)) 258 return; 259 260 /* 261 * Keep track of which addressed devices are found. 262 */ 263 sc->uh_used = malloc(UBAIOSIZE, M_TEMP, M_WAITOK); 264 memset(sc->uh_used, 0, UBAIOSIZE); 265 266 if (sc->uh_beforescan) 267 (*sc->uh_beforescan)(sc); 268 /* 269 * Now start searching for devices. 270 */ 271 config_search_ia(ubasearch, sc->uh_dev, "uba", NULL); 272 273 if (sc->uh_afterscan) 274 (*sc->uh_afterscan)(sc); 275 276 free(sc->uh_used, M_TEMP); 277 } 278 279 int 280 ubasearch(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 281 { 282 struct uba_softc *sc = device_private(parent); 283 struct uba_attach_args ua; 284 int i, csr, vec, br; 285 286 csr = cf->cf_loc[UBACF_CSR]; 287 if (sc->uh_used[ubdevreg(csr)]) 288 return 0; /* something are already at this address */ 289 290 ua.ua_ioh = ubdevreg(csr) + sc->uh_ioh; 291 ua.ua_iot = sc->uh_iot; 292 ua.ua_dmat = sc->uh_dmat; 293 294 if (badaddr((void *)ua.ua_ioh, 2) || 295 (sc->uh_errchk ? (*sc->uh_errchk)(sc):0)) 296 goto forgetit; 297 298 scb_vecref(0, 0); /* Clear vector ref */ 299 i = config_match(parent, cf, &ua); 300 301 if (sc->uh_errchk) 302 if ((*sc->uh_errchk)(sc)) 303 goto forgetit; 304 if (i == 0) 305 goto forgetit; 306 307 i = scb_vecref(&vec, &br); 308 if (i == 0) 309 goto fail; 310 if (vec == 0) 311 goto fail; 312 313 ua.ua_br = br; 314 ua.ua_cvec = vec; 315 ua.ua_iaddr = csr; 316 ua.ua_evcnt = NULL; 317 318 sc->uh_used[ubdevreg(csr)] = 1; 319 320 config_attach(parent, cf, &ua, ubaprint); 321 return 0; 322 323 fail: 324 printf("%s%d at %s csr %o %s\n", 325 cf->cf_name, cf->cf_unit, device_xname(parent), 326 csr, (i ? "zero vector" : "didn't interrupt")); 327 328 forgetit: 329 return 0; 330 } 331 332 /* 333 * Print out some interesting info common to all unibus devices. 334 */ 335 int 336 ubaprint(void *aux, const char *uba) 337 { 338 struct uba_attach_args *ua = aux; 339 340 aprint_normal(" csr %o vec %o ipl %x", ua->ua_iaddr, 341 ua->ua_cvec & 511, ua->ua_br); 342 return UNCONF; 343 } 344 345 /* 346 * Move to machdep eventually 347 */ 348 void 349 uba_intr_establish(void *icookie, int vec, void (*ifunc)(void *iarg), 350 void *iarg, struct evcnt *ev) 351 { 352 scb_vecalloc(vec, ifunc, iarg, SCB_ISTACK, ev); 353 } 354