vsbus.c revision 1.27
1 /* $NetBSD: vsbus.c,v 1.27 2000/06/25 16:00:43 ragge 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/map.h> 44 #include <sys/device.h> 45 #include <sys/dkstat.h> 46 #include <sys/disklabel.h> 47 #include <sys/syslog.h> 48 #include <sys/stat.h> 49 50 #include <vm/vm.h> 51 #include <vm/vm_kern.h> 52 53 #define _VAX_BUS_DMA_PRIVATE 54 #include <machine/bus.h> 55 #include <machine/pte.h> 56 #include <machine/sid.h> 57 #include <machine/scb.h> 58 #include <machine/cpu.h> 59 #include <machine/trap.h> 60 #include <machine/nexus.h> 61 62 #include <machine/uvax.h> 63 #include <machine/ka410.h> 64 #include <machine/ka420.h> 65 #include <machine/ka43.h> 66 67 #include <machine/vsbus.h> 68 69 #include "ioconf.h" 70 #include "opt_cputype.h" 71 72 int vsbus_match(struct device *, struct cfdata *, void *); 73 void vsbus_attach(struct device *, struct device *, void *); 74 int vsbus_print(void *, const char *); 75 int vsbus_search(struct device *, struct cfdata *, void *); 76 77 static struct vax_bus_dma_tag vsbus_bus_dma_tag = { 78 0, 79 0, 80 0, 81 0, 82 0, 83 0, 84 _bus_dmamap_create, 85 _bus_dmamap_destroy, 86 _bus_dmamap_load, 87 _bus_dmamap_load_mbuf, 88 _bus_dmamap_load_uio, 89 _bus_dmamap_load_raw, 90 _bus_dmamap_unload, 91 _bus_dmamap_sync, 92 _bus_dmamem_alloc, 93 _bus_dmamem_free, 94 _bus_dmamem_map, 95 _bus_dmamem_unmap, 96 _bus_dmamem_mmap, 97 }; 98 99 extern struct vax_bus_space vax_mem_bus_space; 100 static SIMPLEQ_HEAD(, vsbus_dma) vsbus_dma; 101 102 struct cfattach vsbus_ca = { 103 sizeof(struct vsbus_softc), vsbus_match, vsbus_attach 104 }; 105 106 int 107 vsbus_print(aux, name) 108 void *aux; 109 const char *name; 110 { 111 struct vsbus_attach_args *va = aux; 112 113 printf(" csr 0x%lx vec %o ipl %x maskbit %d", va->va_paddr, 114 va->va_cvec & 511, va->va_br, va->va_maskno - 1); 115 return(UNCONF); 116 } 117 118 int 119 vsbus_match(parent, cf, aux) 120 struct device *parent; 121 struct cfdata *cf; 122 void *aux; 123 { 124 if (vax_bustype == VAX_VSBUS) 125 return 1; 126 return 0; 127 } 128 129 void 130 vsbus_attach(parent, self, aux) 131 struct device *parent, *self; 132 void *aux; 133 { 134 struct vsbus_softc *sc = (void *)self; 135 int dbase, dsize; 136 137 printf("\n"); 138 139 sc->sc_dmatag = vsbus_bus_dma_tag; 140 141 switch (vax_boardtype) { 142 #if VAX49 143 case VAX_BTYP_49: 144 sc->sc_vsregs = vax_map_physmem(0x25c00000, 1); 145 sc->sc_intreq = (char *)sc->sc_vsregs + 12; 146 sc->sc_intclr = (char *)sc->sc_vsregs + 12; 147 sc->sc_intmsk = (char *)sc->sc_vsregs + 8; 148 vsbus_dma_init(sc, 8192); 149 break; 150 #endif 151 152 #if VAX46 || VAX48 153 case VAX_BTYP_48: 154 case VAX_BTYP_46: 155 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 156 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 157 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 158 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 159 vsbus_dma_init(sc, 32768); 160 #endif 161 162 default: 163 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 164 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 165 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 166 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 167 if (vax_boardtype == VAX_BTYP_410) { 168 dbase = KA410_DMA_BASE; 169 dsize = KA410_DMA_SIZE; 170 } else { 171 dbase = KA420_DMA_BASE; 172 dsize = KA420_DMA_SIZE; 173 *(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */ 174 } 175 sc->sc_dmasize = dsize; 176 sc->sc_dmaaddr = uvm_km_valloc(kernel_map, dsize); 177 ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG); 178 break; 179 } 180 181 SIMPLEQ_INIT(&vsbus_dma); 182 /* 183 * First: find which interrupts we won't care about. 184 * There are interrupts that interrupt on a periodic basic 185 * that we don't want to interfere with the rest of the 186 * interrupt probing. 187 */ 188 *sc->sc_intmsk = 0; 189 *sc->sc_intclr = 0xff; 190 DELAY(1000000); /* Wait a second */ 191 sc->sc_mask = *sc->sc_intreq; 192 printf("%s: interrupt mask %x\n", self->dv_xname, sc->sc_mask); 193 /* 194 * now check for all possible devices on this "bus" 195 */ 196 config_search(vsbus_search, self, NULL); 197 198 /* Autoconfig finished, enable interrupts */ 199 *sc->sc_intmsk = ~sc->sc_mask; 200 } 201 202 int 203 vsbus_search(parent, cf, aux) 204 struct device *parent; 205 struct cfdata *cf; 206 void *aux; 207 { 208 struct vsbus_softc *sc = (void *)parent; 209 struct vsbus_attach_args va; 210 int i, vec, br; 211 u_char c; 212 213 va.va_paddr = cf->cf_loc[0]; 214 va.va_addr = vax_map_physmem(va.va_paddr, 1); 215 va.va_dmat = &sc->sc_dmatag; 216 va.va_iot = &vax_mem_bus_space; 217 218 *sc->sc_intmsk = 0; 219 *sc->sc_intclr = 0xff; 220 scb_vecref(0, 0); /* Clear vector ref */ 221 222 i = (*cf->cf_attach->ca_match) (parent, cf, &va); 223 vax_unmap_physmem(va.va_addr, 1); 224 c = *sc->sc_intreq & ~sc->sc_mask; 225 if (i == 0) 226 goto forgetit; 227 if (i > 10) 228 c = sc->sc_mask; /* Fooling interrupt */ 229 else if (c == 0) 230 goto forgetit; 231 232 *sc->sc_intmsk = c; 233 DELAY(100); 234 *sc->sc_intmsk = 0; 235 va.va_maskno = ffs((u_int)c); 236 i = scb_vecref(&vec, &br); 237 if (i == 0) 238 goto fail; 239 if (vec == 0) 240 goto fail; 241 242 va.va_br = br; 243 va.va_cvec = vec; 244 va.va_dmaaddr = sc->sc_dmaaddr; 245 va.va_dmasize = sc->sc_dmasize; 246 *sc->sc_intmsk = c; /* Allow interrupts during attach */ 247 config_attach(parent, cf, &va, vsbus_print); 248 *sc->sc_intmsk = 0; 249 return 0; 250 251 fail: 252 printf("%s%d at %s csr %x %s\n", 253 cf->cf_driver->cd_name, cf->cf_unit, parent->dv_xname, 254 cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt")); 255 forgetit: 256 return 0; 257 } 258 259 /* 260 * Sets a new interrupt mask. Returns the old one. 261 * Works like spl functions. 262 */ 263 unsigned char 264 vsbus_setmask(mask) 265 unsigned char mask; 266 { 267 struct vsbus_softc *sc; 268 unsigned char ch; 269 270 if (vsbus_cd.cd_ndevs == 0) 271 return 0; 272 sc = vsbus_cd.cd_devs[0]; 273 274 ch = *sc->sc_intmsk; 275 *sc->sc_intmsk = mask; 276 return ch; 277 } 278 279 /* 280 * Clears the interrupts in mask. 281 */ 282 void 283 vsbus_clrintr(mask) 284 unsigned char mask; 285 { 286 struct vsbus_softc *sc; 287 288 if (vsbus_cd.cd_ndevs == 0) 289 return; 290 sc = vsbus_cd.cd_devs[0]; 291 292 *sc->sc_intclr = mask; 293 } 294 295 /* 296 * Copy data from/to a user process' space from the DMA area. 297 * Use the physical memory directly. 298 */ 299 void 300 vsbus_copytoproc(struct proc *p, caddr_t from, caddr_t to, int len) 301 { 302 struct pte *pte; 303 paddr_t pa; 304 305 if ((long)to & KERNBASE) { /* In kernel space */ 306 bcopy(from, to, len); 307 return; 308 } 309 pte = uvtopte(TRUNC_PAGE(to), (&p->p_addr->u_pcb)); 310 if ((vaddr_t)to & PGOFSET) { 311 int cz = ROUND_PAGE(to) - (vaddr_t)to; 312 313 pa = (pte->pg_pfn << VAX_PGSHIFT) | (NBPG - cz) | KERNBASE; 314 bcopy(from, (caddr_t)pa, min(cz, len)); 315 from += cz; 316 to += cz; 317 len -= cz; 318 pte += 8; /* XXX */ 319 } 320 while (len > 0) { 321 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 322 bcopy(from, (caddr_t)pa, min(NBPG, len)); 323 from += NBPG; 324 to += NBPG; 325 len -= NBPG; 326 pte += 8; /* XXX */ 327 } 328 } 329 330 void 331 vsbus_copyfromproc(struct proc *p, caddr_t from, caddr_t to, int len) 332 { 333 struct pte *pte; 334 paddr_t pa; 335 336 if ((long)from & KERNBASE) { /* In kernel space */ 337 bcopy(from, to, len); 338 return; 339 } 340 pte = uvtopte(TRUNC_PAGE(from), (&p->p_addr->u_pcb)); 341 if ((vaddr_t)from & PGOFSET) { 342 int cz = ROUND_PAGE(from) - (vaddr_t)from; 343 344 pa = (pte->pg_pfn << VAX_PGSHIFT) | (NBPG - cz) | KERNBASE; 345 bcopy((caddr_t)pa, to, min(cz, len)); 346 from += cz; 347 to += cz; 348 len -= cz; 349 pte += 8; /* XXX */ 350 } 351 while (len > 0) { 352 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 353 bcopy((caddr_t)pa, to, min(NBPG, len)); 354 from += NBPG; 355 to += NBPG; 356 len -= NBPG; 357 pte += 8; /* XXX */ 358 } 359 } 360 361 /* 362 * There can only be one user of the DMA area on VS2k/VS3100 at one 363 * time, so keep track of it here. 364 */ 365 static int vsbus_active = 0; 366 367 void 368 vsbus_dma_start(struct vsbus_dma *vd) 369 { 370 371 SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q); 372 373 if (vsbus_active == 0) 374 vsbus_dma_intr(); 375 } 376 377 void 378 vsbus_dma_intr(void) 379 { 380 struct vsbus_dma *vd; 381 382 vd = SIMPLEQ_FIRST(&vsbus_dma); 383 if (vd == NULL) { 384 vsbus_active = 0; 385 return; 386 } 387 vsbus_active = 1; 388 SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd, vd_q); 389 (*vd->vd_go)(vd->vd_arg); 390 } 391 392
Indexes created Tue Sep 30 11:09:46 GMT 2025