vsbus.c revision 1.52
1 /* $NetBSD: vsbus.c,v 1.52 2007/03/04 19:21:56 christos 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/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: vsbus.c,v 1.52 2007/03/04 19:21:56 christos Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/buf.h> 41 #include <sys/conf.h> 42 #include <sys/file.h> 43 #include <sys/ioctl.h> 44 #include <sys/proc.h> 45 #include <sys/user.h> 46 #include <sys/device.h> 47 #include <sys/disklabel.h> 48 #include <sys/syslog.h> 49 #include <sys/stat.h> 50 51 #include <uvm/uvm_extern.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 "locators.h" 71 #include "opt_cputype.h" 72 73 int vsbus_match(struct device *, struct cfdata *, void *); 74 void vsbus_attach(struct device *, struct device *, void *); 75 int vsbus_print(void *, const char *); 76 int vsbus_search(struct device *, struct cfdata *, 77 const int *, void *); 78 79 static struct vax_bus_dma_tag vsbus_bus_dma_tag = { 80 0, 81 0, 82 0, 83 0, 84 0, 85 0, 86 _bus_dmamap_create, 87 _bus_dmamap_destroy, 88 _bus_dmamap_load, 89 _bus_dmamap_load_mbuf, 90 _bus_dmamap_load_uio, 91 _bus_dmamap_load_raw, 92 _bus_dmamap_unload, 93 _bus_dmamap_sync, 94 _bus_dmamem_alloc, 95 _bus_dmamem_free, 96 _bus_dmamem_map, 97 _bus_dmamem_unmap, 98 _bus_dmamem_mmap, 99 }; 100 101 extern struct vax_bus_space vax_mem_bus_space; 102 static SIMPLEQ_HEAD(, vsbus_dma) vsbus_dma; 103 104 CFATTACH_DECL(vsbus, sizeof(struct vsbus_softc), 105 vsbus_match, vsbus_attach, NULL, NULL); 106 107 int 108 vsbus_print(aux, name) 109 void *aux; 110 const char *name; 111 { 112 struct vsbus_attach_args *va = aux; 113 114 aprint_normal(" csr 0x%lx vec %o ipl %x maskbit %d", va->va_paddr, 115 va->va_cvec & 511, va->va_br, va->va_maskno - 1); 116 return(UNCONF); 117 } 118 119 int 120 vsbus_match(parent, cf, aux) 121 struct device *parent; 122 struct cfdata *cf; 123 void *aux; 124 { 125 #if VAX53 || VAXANY 126 /* Kludge: VAX53 is... special */ 127 if (vax_boardtype == VAX_BTYP_53 && (int)aux == 1) 128 return 1; /* Hack */ 129 #endif 130 if (vax_bustype == VAX_VSBUS) 131 return 1; 132 return 0; 133 } 134 135 void 136 vsbus_attach(parent, self, aux) 137 struct device *parent, *self; 138 void *aux; 139 { 140 struct vsbus_softc *sc = (void *)self; 141 int dbase, dsize; 142 143 printf("\n"); 144 145 sc->sc_dmatag = vsbus_bus_dma_tag; 146 147 switch (vax_boardtype) { 148 #if VAX49 || VAX53 149 case VAX_BTYP_53: 150 case VAX_BTYP_49: 151 sc->sc_vsregs = vax_map_physmem(0x25c00000, 1); 152 sc->sc_intreq = (char *)sc->sc_vsregs + 12; 153 sc->sc_intclr = (char *)sc->sc_vsregs + 12; 154 sc->sc_intmsk = (char *)sc->sc_vsregs + 8; 155 vsbus_dma_init(sc, 8192); 156 break; 157 #endif 158 159 #if VAX46 || VAX48 160 case VAX_BTYP_48: 161 case VAX_BTYP_46: 162 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 163 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 164 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 165 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 166 vsbus_dma_init(sc, 32768); 167 #endif 168 169 default: 170 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 171 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 172 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 173 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 174 if (vax_boardtype == VAX_BTYP_410) { 175 dbase = KA410_DMA_BASE; 176 dsize = KA410_DMA_SIZE; 177 } else { 178 dbase = KA420_DMA_BASE; 179 dsize = KA420_DMA_SIZE; 180 *(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */ 181 } 182 sc->sc_dmasize = dsize; 183 sc->sc_dmaaddr = uvm_km_alloc(kernel_map, dsize, 0, 184 UVM_KMF_VAONLY); 185 ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG); 186 break; 187 } 188 189 SIMPLEQ_INIT(&vsbus_dma); 190 /* 191 * First: find which interrupts we won't care about. 192 * There are interrupts that interrupt on a periodic basic 193 * that we don't want to interfere with the rest of the 194 * interrupt probing. 195 */ 196 *sc->sc_intmsk = 0; 197 *sc->sc_intclr = 0xff; 198 DELAY(1000000); /* Wait a second */ 199 sc->sc_mask = *sc->sc_intreq; 200 printf("%s: interrupt mask %x\n", self->dv_xname, sc->sc_mask); 201 /* 202 * now check for all possible devices on this "bus" 203 */ 204 config_search_ia(vsbus_search, self, "vsbus", NULL); 205 206 /* Autoconfig finished, enable interrupts */ 207 *sc->sc_intmsk = ~sc->sc_mask; 208 } 209 210 int 211 vsbus_search(parent, cf, ldesc, aux) 212 struct device *parent; 213 struct cfdata *cf; 214 const int *ldesc; 215 void *aux; 216 { 217 struct vsbus_softc *sc = (void *)parent; 218 struct vsbus_attach_args va; 219 int i, vec, br; 220 u_char c; 221 222 va.va_paddr = cf->cf_loc[VSBUSCF_CSR]; 223 va.va_addr = vax_map_physmem(va.va_paddr, 1); 224 va.va_dmat = &sc->sc_dmatag; 225 va.va_iot = &vax_mem_bus_space; 226 227 *sc->sc_intmsk = 0; 228 *sc->sc_intclr = 0xff; 229 scb_vecref(0, 0); /* Clear vector ref */ 230 231 i = config_match(parent, cf, &va); 232 vax_unmap_physmem(va.va_addr, 1); 233 c = *sc->sc_intreq & ~sc->sc_mask; 234 if (i == 0) 235 goto forgetit; 236 if (i > 10) 237 c = sc->sc_mask; /* Fooling interrupt */ 238 else if (c == 0) 239 goto forgetit; 240 241 *sc->sc_intmsk = c; 242 DELAY(100); 243 *sc->sc_intmsk = 0; 244 va.va_maskno = ffs((u_int)c); 245 i = scb_vecref(&vec, &br); 246 if (i == 0) 247 goto fail; 248 if (vec == 0) 249 goto fail; 250 251 va.va_br = br; 252 va.va_cvec = vec; 253 va.va_dmaaddr = sc->sc_dmaaddr; 254 va.va_dmasize = sc->sc_dmasize; 255 *sc->sc_intmsk = c; /* Allow interrupts during attach */ 256 config_attach(parent, cf, &va, vsbus_print); 257 *sc->sc_intmsk = 0; 258 return 0; 259 260 fail: 261 printf("%s%d at %s csr 0x%x %s\n", 262 cf->cf_name, cf->cf_unit, parent->dv_xname, 263 cf->cf_loc[VSBUSCF_CSR], (i ? "zero vector" : "didn't interrupt")); 264 forgetit: 265 return 0; 266 } 267 268 /* 269 * Sets a new interrupt mask. Returns the old one. 270 * Works like spl functions. 271 */ 272 unsigned char 273 vsbus_setmask(mask) 274 unsigned char mask; 275 { 276 struct vsbus_softc *sc; 277 unsigned char ch; 278 279 if (vsbus_cd.cd_ndevs == 0) 280 return 0; 281 sc = vsbus_cd.cd_devs[0]; 282 283 ch = *sc->sc_intmsk; 284 *sc->sc_intmsk = mask; 285 return ch; 286 } 287 288 /* 289 * Clears the interrupts in mask. 290 */ 291 void 292 vsbus_clrintr(mask) 293 unsigned char mask; 294 { 295 struct vsbus_softc *sc; 296 297 if (vsbus_cd.cd_ndevs == 0) 298 return; 299 sc = vsbus_cd.cd_devs[0]; 300 301 *sc->sc_intclr = mask; 302 } 303 304 /* 305 * Copy data from/to a user process' space from the DMA area. 306 * Use the physical memory directly. 307 */ 308 void 309 vsbus_copytoproc(struct proc *p, void *fromv, void *tov, int len) 310 { 311 char *from = fromv, *to = tov; 312 struct pte *pte; 313 paddr_t pa; 314 315 if ((vaddr_t)to & KERNBASE) { /* In kernel space */ 316 bcopy(from, to, len); 317 return; 318 } 319 320 #ifdef DIAGNOSTIC 321 if (p == NULL) 322 panic("vsbus_copytoproc: no proc"); 323 #endif 324 325 if ((vaddr_t)to & 0x40000000) 326 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[vax_btop((vaddr_t)to & ~0x40000000)]; 327 else 328 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[vax_btop((vaddr_t)to)]; 329 if ((vaddr_t)to & PGOFSET) { 330 int cz = round_page((vaddr_t)to) - (vaddr_t)to; 331 332 pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; 333 bcopy(from, (void *)pa, min(cz, len)); 334 from += cz; 335 to += cz; 336 len -= cz; 337 pte += 8; /* XXX */ 338 } 339 while (len > 0) { 340 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 341 bcopy(from, (void *)pa, min(PAGE_SIZE, len)); 342 from += PAGE_SIZE; 343 to += PAGE_SIZE; 344 len -= PAGE_SIZE; 345 pte += 8; /* XXX */ 346 } 347 } 348 349 void 350 vsbus_copyfromproc(struct proc *p, void *fromv, void *tov, int len) 351 { 352 char *from = fromv, *to = tov; 353 struct pte *pte; 354 paddr_t pa; 355 356 if ((vaddr_t)from & KERNBASE) { /* In kernel space */ 357 bcopy(from, to, len); 358 return; 359 } 360 361 #ifdef DIAGNOSTIC 362 if (p == NULL) 363 panic("vsbus_copyfromproc: no proc"); 364 #endif 365 366 if ((vaddr_t)from & 0x40000000) 367 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[vax_btop((vaddr_t)from & ~0x40000000)]; 368 else 369 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[vax_btop((vaddr_t)from)]; 370 if ((vaddr_t)from & PGOFSET) { 371 int cz = round_page((vaddr_t)from) - (vaddr_t)from; 372 373 pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; 374 bcopy((void *)pa, to, min(cz, len)); 375 from += cz; 376 to += cz; 377 len -= cz; 378 pte += 8; /* XXX */ 379 } 380 while (len > 0) { 381 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 382 bcopy((void *)pa, to, min(PAGE_SIZE, len)); 383 from += PAGE_SIZE; 384 to += PAGE_SIZE; 385 len -= PAGE_SIZE; 386 pte += 8; /* XXX */ 387 } 388 } 389 390 /* 391 * There can only be one user of the DMA area on VS2k/VS3100 at one 392 * time, so keep track of it here. 393 */ 394 static int vsbus_active = 0; 395 396 void 397 vsbus_dma_start(struct vsbus_dma *vd) 398 { 399 400 SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q); 401 402 if (vsbus_active == 0) 403 vsbus_dma_intr(); 404 } 405 406 void 407 vsbus_dma_intr(void) 408 { 409 struct vsbus_dma *vd; 410 411 vd = SIMPLEQ_FIRST(&vsbus_dma); 412 if (vd == NULL) { 413 vsbus_active = 0; 414 return; 415 } 416 vsbus_active = 1; 417 SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd_q); 418 (*vd->vd_go)(vd->vd_arg); 419 } 420 421
Indexes created Tue Sep 30 10:09:55 GMT 2025