vsbus.c revision 1.36
1 /* $NetBSD: vsbus.c,v 1.36 2002/09/27 03:18:08 thorpej Exp $ */ 2 /* 3 * Copyright (c) 1996, 1999 Ludd, University of Lule}, Sweden. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Ludd by Bertram Barth. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed at Ludd, University of 19 * Lule}, Sweden and its contributors. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/buf.h> 38 #include <sys/conf.h> 39 #include <sys/file.h> 40 #include <sys/ioctl.h> 41 #include <sys/proc.h> 42 #include <sys/user.h> 43 #include <sys/device.h> 44 #include <sys/dkstat.h> 45 #include <sys/disklabel.h> 46 #include <sys/syslog.h> 47 #include <sys/stat.h> 48 49 #include <uvm/uvm_extern.h> 50 51 #define _VAX_BUS_DMA_PRIVATE 52 #include <machine/bus.h> 53 #include <machine/pte.h> 54 #include <machine/sid.h> 55 #include <machine/scb.h> 56 #include <machine/cpu.h> 57 #include <machine/trap.h> 58 #include <machine/nexus.h> 59 60 #include <machine/uvax.h> 61 #include <machine/ka410.h> 62 #include <machine/ka420.h> 63 #include <machine/ka43.h> 64 65 #include <machine/vsbus.h> 66 67 #include "ioconf.h" 68 #include "opt_cputype.h" 69 70 int vsbus_match(struct device *, struct cfdata *, void *); 71 void vsbus_attach(struct device *, struct device *, void *); 72 int vsbus_print(void *, const char *); 73 int vsbus_search(struct device *, struct cfdata *, void *); 74 75 static struct vax_bus_dma_tag vsbus_bus_dma_tag = { 76 0, 77 0, 78 0, 79 0, 80 0, 81 0, 82 _bus_dmamap_create, 83 _bus_dmamap_destroy, 84 _bus_dmamap_load, 85 _bus_dmamap_load_mbuf, 86 _bus_dmamap_load_uio, 87 _bus_dmamap_load_raw, 88 _bus_dmamap_unload, 89 _bus_dmamap_sync, 90 _bus_dmamem_alloc, 91 _bus_dmamem_free, 92 _bus_dmamem_map, 93 _bus_dmamem_unmap, 94 _bus_dmamem_mmap, 95 }; 96 97 extern struct vax_bus_space vax_mem_bus_space; 98 static SIMPLEQ_HEAD(, vsbus_dma) vsbus_dma; 99 100 struct cfattach vsbus_ca = { 101 sizeof(struct vsbus_softc), vsbus_match, vsbus_attach 102 }; 103 104 int 105 vsbus_print(aux, name) 106 void *aux; 107 const char *name; 108 { 109 struct vsbus_attach_args *va = aux; 110 111 printf(" csr 0x%lx vec %o ipl %x maskbit %d", va->va_paddr, 112 va->va_cvec & 511, va->va_br, va->va_maskno - 1); 113 return(UNCONF); 114 } 115 116 int 117 vsbus_match(parent, cf, aux) 118 struct device *parent; 119 struct cfdata *cf; 120 void *aux; 121 { 122 #if VAX53 || VAXANY 123 /* Kludge: VAX53 is... special */ 124 if (vax_boardtype == VAX_BTYP_53 && (int)aux == 1) 125 return 1; /* Hack */ 126 #endif 127 if (vax_bustype == VAX_VSBUS) 128 return 1; 129 return 0; 130 } 131 132 void 133 vsbus_attach(parent, self, aux) 134 struct device *parent, *self; 135 void *aux; 136 { 137 struct vsbus_softc *sc = (void *)self; 138 int dbase, dsize; 139 140 printf("\n"); 141 142 sc->sc_dmatag = vsbus_bus_dma_tag; 143 144 switch (vax_boardtype) { 145 #if VAX49 || VAX53 146 case VAX_BTYP_53: 147 case VAX_BTYP_49: 148 sc->sc_vsregs = vax_map_physmem(0x25c00000, 1); 149 sc->sc_intreq = (char *)sc->sc_vsregs + 12; 150 sc->sc_intclr = (char *)sc->sc_vsregs + 12; 151 sc->sc_intmsk = (char *)sc->sc_vsregs + 8; 152 vsbus_dma_init(sc, 8192); 153 break; 154 #endif 155 156 #if VAX46 || VAX48 157 case VAX_BTYP_48: 158 case VAX_BTYP_46: 159 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 160 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 161 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 162 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 163 vsbus_dma_init(sc, 32768); 164 #endif 165 166 default: 167 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 168 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 169 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 170 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 171 if (vax_boardtype == VAX_BTYP_410) { 172 dbase = KA410_DMA_BASE; 173 dsize = KA410_DMA_SIZE; 174 } else { 175 dbase = KA420_DMA_BASE; 176 dsize = KA420_DMA_SIZE; 177 *(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */ 178 } 179 sc->sc_dmasize = dsize; 180 sc->sc_dmaaddr = uvm_km_valloc(kernel_map, dsize); 181 ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG); 182 break; 183 } 184 185 SIMPLEQ_INIT(&vsbus_dma); 186 /* 187 * First: find which interrupts we won't care about. 188 * There are interrupts that interrupt on a periodic basic 189 * that we don't want to interfere with the rest of the 190 * interrupt probing. 191 */ 192 *sc->sc_intmsk = 0; 193 *sc->sc_intclr = 0xff; 194 DELAY(1000000); /* Wait a second */ 195 sc->sc_mask = *sc->sc_intreq; 196 printf("%s: interrupt mask %x\n", self->dv_xname, sc->sc_mask); 197 /* 198 * now check for all possible devices on this "bus" 199 */ 200 config_search(vsbus_search, self, NULL); 201 202 /* Autoconfig finished, enable interrupts */ 203 *sc->sc_intmsk = ~sc->sc_mask; 204 } 205 206 int 207 vsbus_search(parent, cf, aux) 208 struct device *parent; 209 struct cfdata *cf; 210 void *aux; 211 { 212 struct vsbus_softc *sc = (void *)parent; 213 struct vsbus_attach_args va; 214 int i, vec, br; 215 u_char c; 216 217 va.va_paddr = cf->cf_loc[0]; 218 va.va_addr = vax_map_physmem(va.va_paddr, 1); 219 va.va_dmat = &sc->sc_dmatag; 220 va.va_iot = &vax_mem_bus_space; 221 222 *sc->sc_intmsk = 0; 223 *sc->sc_intclr = 0xff; 224 scb_vecref(0, 0); /* Clear vector ref */ 225 226 i = config_match(parent, cf, &va); 227 vax_unmap_physmem(va.va_addr, 1); 228 c = *sc->sc_intreq & ~sc->sc_mask; 229 if (i == 0) 230 goto forgetit; 231 if (i > 10) 232 c = sc->sc_mask; /* Fooling interrupt */ 233 else if (c == 0) 234 goto forgetit; 235 236 *sc->sc_intmsk = c; 237 DELAY(100); 238 *sc->sc_intmsk = 0; 239 va.va_maskno = ffs((u_int)c); 240 i = scb_vecref(&vec, &br); 241 if (i == 0) 242 goto fail; 243 if (vec == 0) 244 goto fail; 245 246 va.va_br = br; 247 va.va_cvec = vec; 248 va.va_dmaaddr = sc->sc_dmaaddr; 249 va.va_dmasize = sc->sc_dmasize; 250 *sc->sc_intmsk = c; /* Allow interrupts during attach */ 251 config_attach(parent, cf, &va, vsbus_print); 252 *sc->sc_intmsk = 0; 253 return 0; 254 255 fail: 256 printf("%s%d at %s csr 0x%x %s\n", 257 cf->cf_name, cf->cf_unit, parent->dv_xname, 258 cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt")); 259 forgetit: 260 return 0; 261 } 262 263 /* 264 * Sets a new interrupt mask. Returns the old one. 265 * Works like spl functions. 266 */ 267 unsigned char 268 vsbus_setmask(mask) 269 unsigned char mask; 270 { 271 struct vsbus_softc *sc; 272 unsigned char ch; 273 274 if (vsbus_cd.cd_ndevs == 0) 275 return 0; 276 sc = vsbus_cd.cd_devs[0]; 277 278 ch = *sc->sc_intmsk; 279 *sc->sc_intmsk = mask; 280 return ch; 281 } 282 283 /* 284 * Clears the interrupts in mask. 285 */ 286 void 287 vsbus_clrintr(mask) 288 unsigned char mask; 289 { 290 struct vsbus_softc *sc; 291 292 if (vsbus_cd.cd_ndevs == 0) 293 return; 294 sc = vsbus_cd.cd_devs[0]; 295 296 *sc->sc_intclr = mask; 297 } 298 299 /* 300 * Copy data from/to a user process' space from the DMA area. 301 * Use the physical memory directly. 302 */ 303 void 304 vsbus_copytoproc(struct proc *p, caddr_t from, caddr_t to, int len) 305 { 306 struct pte *pte; 307 paddr_t pa; 308 309 if ((vaddr_t)to & KERNBASE) { /* In kernel space */ 310 bcopy(from, to, len); 311 return; 312 } 313 pte = uvtopte(trunc_page((vaddr_t)to), &p->p_addr->u_pcb); 314 if ((vaddr_t)to & PGOFSET) { 315 int cz = round_page((vaddr_t)to) - (vaddr_t)to; 316 317 pa = (pte->pg_pfn << VAX_PGSHIFT) | (NBPG - cz) | KERNBASE; 318 bcopy(from, (caddr_t)pa, min(cz, len)); 319 from += cz; 320 to += cz; 321 len -= cz; 322 pte += 8; /* XXX */ 323 } 324 while (len > 0) { 325 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 326 bcopy(from, (caddr_t)pa, min(NBPG, len)); 327 from += NBPG; 328 to += NBPG; 329 len -= NBPG; 330 pte += 8; /* XXX */ 331 } 332 } 333 334 void 335 vsbus_copyfromproc(struct proc *p, caddr_t from, caddr_t to, int len) 336 { 337 struct pte *pte; 338 paddr_t pa; 339 340 if ((vaddr_t)from & KERNBASE) { /* In kernel space */ 341 bcopy(from, to, len); 342 return; 343 } 344 pte = uvtopte(trunc_page((vaddr_t)from), &p->p_addr->u_pcb); 345 if ((vaddr_t)from & PGOFSET) { 346 int cz = round_page((vaddr_t)from) - (vaddr_t)from; 347 348 pa = (pte->pg_pfn << VAX_PGSHIFT) | (NBPG - cz) | KERNBASE; 349 bcopy((caddr_t)pa, to, min(cz, len)); 350 from += cz; 351 to += cz; 352 len -= cz; 353 pte += 8; /* XXX */ 354 } 355 while (len > 0) { 356 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 357 bcopy((caddr_t)pa, to, min(NBPG, len)); 358 from += NBPG; 359 to += NBPG; 360 len -= NBPG; 361 pte += 8; /* XXX */ 362 } 363 } 364 365 /* 366 * There can only be one user of the DMA area on VS2k/VS3100 at one 367 * time, so keep track of it here. 368 */ 369 static int vsbus_active = 0; 370 371 void 372 vsbus_dma_start(struct vsbus_dma *vd) 373 { 374 375 SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q); 376 377 if (vsbus_active == 0) 378 vsbus_dma_intr(); 379 } 380 381 void 382 vsbus_dma_intr(void) 383 { 384 struct vsbus_dma *vd; 385 386 vd = SIMPLEQ_FIRST(&vsbus_dma); 387 if (vd == NULL) { 388 vsbus_active = 0; 389 return; 390 } 391 vsbus_active = 1; 392 SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd_q); 393 (*vd->vd_go)(vd->vd_arg); 394 } 395 396
Indexes created Tue Sep 30 07:10:03 GMT 2025