1 /* $NetBSD: vme_sun68k.c,v 1.6 2002/10/02 16:02:31 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg and Matthew Fredette. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/param.h> 40 #include <sys/extent.h> 41 #include <sys/systm.h> 42 #include <sys/device.h> 43 #include <sys/malloc.h> 44 #include <sys/errno.h> 45 46 #include <sys/proc.h> 47 #include <sys/user.h> 48 #include <sys/syslog.h> 49 50 #include <uvm/uvm_extern.h> 51 52 #define _SUN68K_BUS_DMA_PRIVATE 53 #include <machine/bus.h> 54 #include <machine/autoconf.h> 55 #include <machine/pmap.h> 56 #include <machine/dvma.h> 57 58 #include <dev/vme/vmereg.h> 59 #include <dev/vme/vmevar.h> 60 61 #include <sun68k/sun68k/vme_sun68k.h> 62 63 struct sun68kvme_softc { 64 struct device sc_dev; /* base device */ 65 bus_space_tag_t sc_bustag; 66 bus_dma_tag_t sc_dmatag; 67 }; 68 struct sun68kvme_softc *sun68kvme_sc;/*XXX*/ 69 70 /* autoconfiguration driver */ 71 static int sun68kvme_match __P((struct device *, struct cfdata *, void *)); 72 static void sun68kvme_attach __P((struct device *, struct device *, void *)); 73 74 static int sun68k_vme_probe __P((void *, vme_addr_t, vme_size_t, 75 vme_am_t, vme_datasize_t, 76 int (*) __P((void *, bus_space_tag_t, bus_space_handle_t)), void *)); 77 static int sun68k_vme_map __P((void *, vme_addr_t, vme_size_t, vme_am_t, 78 vme_datasize_t, vme_swap_t, 79 bus_space_tag_t *, bus_space_handle_t *, 80 vme_mapresc_t *)); 81 static void sun68k_vme_unmap __P((void *, vme_mapresc_t)); 82 static int sun68k_vme_intr_map __P((void *, int, int, vme_intr_handle_t *)); 83 static const struct evcnt *sun68k_vme_intr_evcnt __P((void *, 84 vme_intr_handle_t)); 85 static void * sun68k_vme_intr_establish __P((void *, vme_intr_handle_t, int, 86 int (*) __P((void *)), void *)); 87 static void sun68k_vme_intr_disestablish __P((void *, void *)); 88 89 /* 90 * DMA functions. 91 */ 92 static void sun68k_vct_dmamap_destroy __P((void *, bus_dmamap_t)); 93 94 static int sun68k_vct_dmamap_create __P((void *, vme_size_t, vme_am_t, 95 vme_datasize_t, vme_swap_t, int, vme_size_t, vme_addr_t, 96 int, bus_dmamap_t *)); 97 static int sun68k_vme_dmamap_load __P((bus_dma_tag_t, bus_dmamap_t, void *, 98 bus_size_t, struct proc *, int)); 99 static int sun68k_vme_dmamap_load_raw __P((bus_dma_tag_t, bus_dmamap_t, 100 bus_dma_segment_t *, int, bus_size_t, int)); 101 102 paddr_t sun68k_vme_mmap_cookie __P((vme_addr_t, vme_am_t, bus_space_handle_t *)); 103 104 CFATTACH_DECL(sun68kvme, sizeof(struct sun68kvme_softc), 105 sun68kvme_match, sun68kvme_attach, NULL, NULL); 106 107 /* 108 * The VME bus logic on sun68k machines maps DMA requests in the first MB 109 * of VME space to the last MB of DVMA space. The base bus_dma code 110 * in machdep.c manages DVMA space; all we must do is adjust the DMA 111 * addresses returned by bus_dmamap_load*() by ANDing them with 112 * DVMA_VME_SLAVE_MASK. 113 */ 114 115 struct vme_chipset_tag sun68k_vme_chipset_tag = { 116 NULL, 117 sun68k_vme_map, 118 sun68k_vme_unmap, 119 sun68k_vme_probe, 120 sun68k_vme_intr_map, 121 sun68k_vme_intr_evcnt, 122 sun68k_vme_intr_establish, 123 sun68k_vme_intr_disestablish, 124 sun68k_vct_dmamap_create, 125 sun68k_vct_dmamap_destroy 126 }; 127 128 struct sun68k_bus_dma_tag sun68k_vme_dma_tag; 129 130 /* Does this machine have a VME bus? */ 131 extern int cpu_has_vme; 132 133 /* 134 * Probe the VME bus. 135 */ 136 int 137 sun68kvme_match(parent, cf, aux) 138 struct device *parent; 139 struct cfdata *cf; 140 void *aux; 141 { 142 struct mainbus_attach_args *ma = aux; 143 144 return (cpu_has_vme && (ma->ma_name == NULL || strcmp(cf->cf_name, ma->ma_name) == 0)); 145 } 146 147 /* 148 * Attach the VME bus. 149 */ 150 void 151 sun68kvme_attach(parent, self, aux) 152 struct device *parent, *self; 153 void *aux; 154 { 155 struct mainbus_attach_args *ma = aux; 156 struct sun68kvme_softc *sc = (struct sun68kvme_softc *)self; 157 struct vmebus_attach_args vba; 158 159 if (self->dv_unit > 0) { 160 printf(" unsupported\n"); 161 return; 162 } 163 164 sun68kvme_sc = sc; 165 166 sc->sc_bustag = ma->ma_bustag; 167 sc->sc_dmatag = ma->ma_dmatag; 168 169 sun68k_vme_chipset_tag.cookie = self; 170 sun68k_vme_dma_tag = *ma->ma_dmatag; 171 sun68k_vme_dma_tag._cookie = self; 172 sun68k_vme_dma_tag._dmamap_load = sun68k_vme_dmamap_load; 173 sun68k_vme_dma_tag._dmamap_load_raw = sun68k_vme_dmamap_load_raw; 174 175 vba.va_vct = &sun68k_vme_chipset_tag; 176 vba.va_bdt = &sun68k_vme_dma_tag; 177 vba.va_slaveconfig = 0; 178 179 printf("\n"); 180 (void)config_found(self, &vba, 0); 181 } 182 183 /* 184 * Probes for a device on the VME bus. 185 * Returns zero on success. 186 */ 187 int 188 sun68k_vme_probe(cookie, addr, len, mod, datasize, callback, arg) 189 void *cookie; 190 vme_addr_t addr; 191 vme_size_t len; 192 vme_am_t mod; 193 vme_datasize_t datasize; 194 int (*callback) __P((void *, bus_space_tag_t, bus_space_handle_t)); 195 void *arg; 196 { 197 struct sun68kvme_softc *sc = (struct sun68kvme_softc *)cookie; 198 bus_type_t iospace; 199 bus_addr_t paddr; 200 bus_space_handle_t handle; 201 bus_size_t size; 202 bus_size_t off, max_off; 203 int error; 204 205 /* Map in the space. */ 206 error = vmebus_translate(mod, addr, &iospace, &paddr); 207 if (error == 0) 208 error = bus_space_map2(sc->sc_bustag, iospace, paddr, len, 209 0, NULL, &handle); 210 if (error) 211 return (error); 212 213 /* Probe the space. */ 214 size = (datasize == VME_D8 ? 1 : (datasize == VME_D16 ? 2 : 4)); 215 max_off = (callback ? size : len); 216 for (off = 0; off < max_off; off += size) { 217 error = _bus_space_peek(sc->sc_bustag, handle, off, size, NULL); 218 if (error) 219 break; 220 } 221 if (error == 0 && callback) 222 error = (*callback)(arg, sc->sc_bustag, handle); 223 224 /* Unmap the space. */ 225 bus_space_unmap(sc->sc_bustag, handle, len); 226 227 return (error); 228 } 229 230 /* 231 * Maps in a device on the VME bus. 232 */ 233 int 234 sun68k_vme_map(cookie, addr, size, mod, datasize, swap, tp, hp, rp) 235 void *cookie; 236 vme_addr_t addr; 237 vme_size_t size; 238 vme_am_t mod; 239 vme_datasize_t datasize; 240 vme_swap_t swap; 241 bus_space_tag_t *tp; 242 bus_space_handle_t *hp; 243 vme_mapresc_t *rp; 244 { 245 struct sun68kvme_softc *sc = (struct sun68kvme_softc *)cookie; 246 bus_type_t iospace; 247 bus_addr_t paddr; 248 int error; 249 250 error = vmebus_translate(mod, addr, &iospace, &paddr); 251 if (error != 0) 252 return (error); 253 254 *tp = sc->sc_bustag; 255 return (bus_space_map2(sc->sc_bustag, iospace, paddr, size, 0, 0, hp)); 256 } 257 258 /* 259 * Assists in mmap'ing a device on the VME bus. 260 */ 261 paddr_t 262 sun68k_vme_mmap_cookie(addr, mod, hp) 263 vme_addr_t addr; 264 vme_am_t mod; 265 bus_space_handle_t *hp; 266 { 267 struct sun68kvme_softc *sc = sun68kvme_sc; 268 bus_type_t iospace; 269 bus_addr_t paddr; 270 int error; 271 272 error = vmebus_translate(mod, addr, &iospace, &paddr); 273 if (error != 0) 274 return (error); 275 276 return (bus_space_mmap2(sc->sc_bustag, iospace, paddr, 0, 0, 0)); 277 } 278 279 struct sun68k_vme_intr_handle { 280 int vec; /* VME interrupt vector */ 281 int pri; /* VME interrupt priority */ 282 }; 283 284 /* 285 * This maps a VME interrupt level and vector pair into 286 * a data structure that can subsequently be used to 287 * establish an interrupt handler. 288 */ 289 int 290 sun68k_vme_intr_map(cookie, level, vec, ihp) 291 void *cookie; 292 int level; 293 int vec; 294 vme_intr_handle_t *ihp; 295 { 296 struct sun68k_vme_intr_handle *svih; 297 298 svih = (vme_intr_handle_t) 299 malloc(sizeof(struct sun68k_vme_intr_handle), M_DEVBUF, M_NOWAIT); 300 svih->pri = level; 301 svih->vec = vec; 302 *ihp = svih; 303 return (0); 304 } 305 306 const struct evcnt * 307 sun68k_vme_intr_evcnt(cookie, vih) 308 void *cookie; 309 vme_intr_handle_t vih; 310 { 311 312 /* XXX for now, no evcnt parent reported */ 313 return NULL; 314 } 315 316 /* 317 * Establish a VME bus interrupt. 318 */ 319 void * 320 sun68k_vme_intr_establish(cookie, vih, pri, func, arg) 321 void *cookie; 322 vme_intr_handle_t vih; 323 int pri; 324 int (*func) __P((void *)); 325 void *arg; 326 { 327 struct sun68k_vme_intr_handle *svih = 328 (struct sun68k_vme_intr_handle *)vih; 329 330 /* Install interrupt handler. */ 331 isr_add_vectored(func, (void *)arg, 332 svih->pri, svih->vec); 333 334 return (NULL); 335 } 336 337 void 338 sun68k_vme_unmap(cookie, resc) 339 void * cookie; 340 vme_mapresc_t resc; 341 { 342 /* Not implemented */ 343 panic("sun68k_vme_unmap"); 344 } 345 346 void 347 sun68k_vme_intr_disestablish(cookie, a) 348 void *cookie; 349 void *a; 350 { 351 /* Not implemented */ 352 panic("sun68k_vme_intr_disestablish"); 353 } 354 355 /* 356 * VME DMA functions. 357 */ 358 359 static void 360 sun68k_vct_dmamap_destroy(cookie, map) 361 void *cookie; 362 bus_dmamap_t map; 363 { 364 struct sun68kvme_softc *sc = (struct sun68kvme_softc *)cookie; 365 bus_dmamap_destroy(sc->sc_dmatag, map); 366 } 367 368 static int 369 sun68k_vct_dmamap_create(cookie, size, am, datasize, swap, nsegments, maxsegsz, 370 boundary, flags, dmamp) 371 void *cookie; 372 vme_size_t size; 373 vme_am_t am; 374 vme_datasize_t datasize; 375 vme_swap_t swap; 376 int nsegments; 377 vme_size_t maxsegsz; 378 vme_addr_t boundary; 379 int flags; 380 bus_dmamap_t *dmamp; 381 { 382 struct sun68kvme_softc *sc = (struct sun68kvme_softc *)cookie; 383 384 /* Allocate a base map through parent bus ops */ 385 return (bus_dmamap_create(sc->sc_dmatag, size, nsegments, maxsegsz, 386 boundary, flags, dmamp)); 387 } 388 389 int 390 sun68k_vme_dmamap_load(t, map, buf, buflen, p, flags) 391 bus_dma_tag_t t; 392 bus_dmamap_t map; 393 void *buf; 394 bus_size_t buflen; 395 struct proc *p; 396 int flags; 397 { 398 int error; 399 400 error = _bus_dmamap_load(t, map, buf, buflen, p, flags); 401 if (error == 0) 402 map->dm_segs[0].ds_addr &= DVMA_VME_SLAVE_MASK; 403 return (error); 404 } 405 406 int 407 sun68k_vme_dmamap_load_raw(t, map, segs, nsegs, size, flags) 408 bus_dma_tag_t t; 409 bus_dmamap_t map; 410 bus_dma_segment_t *segs; 411 int nsegs; 412 bus_size_t size; 413 int flags; 414 { 415 int error; 416 417 error = _bus_dmamap_load_raw(t, map, segs, nsegs, size, flags); 418 if (error == 0) 419 map->dm_segs[0].ds_addr &= DVMA_VME_SLAVE_MASK; 420 return (error); 421 } 422 423