vsbus.c revision 1.46
1 /* $NetBSD: vsbus.c,v 1.46 2004/12/14 02:32:03 chs 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 1.46 2004/12/14 02:32:03 chs 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 *, void *); 77 78 static struct vax_bus_dma_tag vsbus_bus_dma_tag = { 79 0, 80 0, 81 0, 82 0, 83 0, 84 0, 85 _bus_dmamap_create, 86 _bus_dmamap_destroy, 87 _bus_dmamap_load, 88 _bus_dmamap_load_mbuf, 89 _bus_dmamap_load_uio, 90 _bus_dmamap_load_raw, 91 _bus_dmamap_unload, 92 _bus_dmamap_sync, 93 _bus_dmamem_alloc, 94 _bus_dmamem_free, 95 _bus_dmamem_map, 96 _bus_dmamem_unmap, 97 _bus_dmamem_mmap, 98 }; 99 100 extern struct vax_bus_space vax_mem_bus_space; 101 static SIMPLEQ_HEAD(, vsbus_dma) vsbus_dma; 102 103 CFATTACH_DECL(vsbus, sizeof(struct vsbus_softc), 104 vsbus_match, vsbus_attach, NULL, NULL); 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 aprint_normal(" 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 VAX53 || VAXANY 125 /* Kludge: VAX53 is... special */ 126 if (vax_boardtype == VAX_BTYP_53 && (int)aux == 1) 127 return 1; /* Hack */ 128 #endif 129 if (vax_bustype == VAX_VSBUS) 130 return 1; 131 return 0; 132 } 133 134 void 135 vsbus_attach(parent, self, aux) 136 struct device *parent, *self; 137 void *aux; 138 { 139 struct vsbus_softc *sc = (void *)self; 140 int dbase, dsize; 141 142 printf("\n"); 143 144 sc->sc_dmatag = vsbus_bus_dma_tag; 145 146 switch (vax_boardtype) { 147 #if VAX49 || VAX53 148 case VAX_BTYP_53: 149 case VAX_BTYP_49: 150 sc->sc_vsregs = vax_map_physmem(0x25c00000, 1); 151 sc->sc_intreq = (char *)sc->sc_vsregs + 12; 152 sc->sc_intclr = (char *)sc->sc_vsregs + 12; 153 sc->sc_intmsk = (char *)sc->sc_vsregs + 8; 154 vsbus_dma_init(sc, 8192); 155 break; 156 #endif 157 158 #if VAX46 || VAX48 159 case VAX_BTYP_48: 160 case VAX_BTYP_46: 161 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 162 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 163 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 164 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 165 vsbus_dma_init(sc, 32768); 166 #endif 167 168 default: 169 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 170 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 171 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 172 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 173 if (vax_boardtype == VAX_BTYP_410) { 174 dbase = KA410_DMA_BASE; 175 dsize = KA410_DMA_SIZE; 176 } else { 177 dbase = KA420_DMA_BASE; 178 dsize = KA420_DMA_SIZE; 179 *(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */ 180 } 181 sc->sc_dmasize = dsize; 182 sc->sc_dmaaddr = uvm_km_valloc(kernel_map, dsize); 183 ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG); 184 break; 185 } 186 187 SIMPLEQ_INIT(&vsbus_dma); 188 /* 189 * First: find which interrupts we won't care about. 190 * There are interrupts that interrupt on a periodic basic 191 * that we don't want to interfere with the rest of the 192 * interrupt probing. 193 */ 194 *sc->sc_intmsk = 0; 195 *sc->sc_intclr = 0xff; 196 DELAY(1000000); /* Wait a second */ 197 sc->sc_mask = *sc->sc_intreq; 198 printf("%s: interrupt mask %x\n", self->dv_xname, sc->sc_mask); 199 /* 200 * now check for all possible devices on this "bus" 201 */ 202 config_search(vsbus_search, self, NULL); 203 204 /* Autoconfig finished, enable interrupts */ 205 *sc->sc_intmsk = ~sc->sc_mask; 206 } 207 208 int 209 vsbus_search(parent, cf, aux) 210 struct device *parent; 211 struct cfdata *cf; 212 void *aux; 213 { 214 struct vsbus_softc *sc = (void *)parent; 215 struct vsbus_attach_args va; 216 int i, vec, br; 217 u_char c; 218 219 va.va_paddr = cf->cf_loc[VSBUSCF_CSR]; 220 va.va_addr = vax_map_physmem(va.va_paddr, 1); 221 va.va_dmat = &sc->sc_dmatag; 222 va.va_iot = &vax_mem_bus_space; 223 224 *sc->sc_intmsk = 0; 225 *sc->sc_intclr = 0xff; 226 scb_vecref(0, 0); /* Clear vector ref */ 227 228 i = config_match(parent, cf, &va); 229 vax_unmap_physmem(va.va_addr, 1); 230 c = *sc->sc_intreq & ~sc->sc_mask; 231 if (i == 0) 232 goto forgetit; 233 if (i > 10) 234 c = sc->sc_mask; /* Fooling interrupt */ 235 else if (c == 0) 236 goto forgetit; 237 238 *sc->sc_intmsk = c; 239 DELAY(100); 240 *sc->sc_intmsk = 0; 241 va.va_maskno = ffs((u_int)c); 242 i = scb_vecref(&vec, &br); 243 if (i == 0) 244 goto fail; 245 if (vec == 0) 246 goto fail; 247 248 va.va_br = br; 249 va.va_cvec = vec; 250 va.va_dmaaddr = sc->sc_dmaaddr; 251 va.va_dmasize = sc->sc_dmasize; 252 *sc->sc_intmsk = c; /* Allow interrupts during attach */ 253 config_attach(parent, cf, &va, vsbus_print); 254 *sc->sc_intmsk = 0; 255 return 0; 256 257 fail: 258 printf("%s%d at %s csr 0x%x %s\n", 259 cf->cf_name, cf->cf_unit, parent->dv_xname, 260 cf->cf_loc[VSBUSCF_CSR], (i ? "zero vector" : "didn't interrupt")); 261 forgetit: 262 return 0; 263 } 264 265 /* 266 * Sets a new interrupt mask. Returns the old one. 267 * Works like spl functions. 268 */ 269 unsigned char 270 vsbus_setmask(mask) 271 unsigned char mask; 272 { 273 struct vsbus_softc *sc; 274 unsigned char ch; 275 276 if (vsbus_cd.cd_ndevs == 0) 277 return 0; 278 sc = vsbus_cd.cd_devs[0]; 279 280 ch = *sc->sc_intmsk; 281 *sc->sc_intmsk = mask; 282 return ch; 283 } 284 285 /* 286 * Clears the interrupts in mask. 287 */ 288 void 289 vsbus_clrintr(mask) 290 unsigned char mask; 291 { 292 struct vsbus_softc *sc; 293 294 if (vsbus_cd.cd_ndevs == 0) 295 return; 296 sc = vsbus_cd.cd_devs[0]; 297 298 *sc->sc_intclr = mask; 299 } 300 301 /* 302 * Copy data from/to a user process' space from the DMA area. 303 * Use the physical memory directly. 304 */ 305 void 306 vsbus_copytoproc(struct proc *p, caddr_t from, caddr_t to, int len) 307 { 308 struct pte *pte; 309 paddr_t pa; 310 311 if ((vaddr_t)to & KERNBASE) { /* In kernel space */ 312 bcopy(from, to, len); 313 return; 314 } 315 316 #ifdef DIAGNOSTIC 317 if (p == NULL) 318 panic("vsbus_copytoproc: no proc"); 319 #endif 320 321 if ((vaddr_t)to & 0x40000000) 322 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[vax_btop((vaddr_t)to & ~0x40000000)]; 323 else 324 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[vax_btop((vaddr_t)to)]; 325 if ((vaddr_t)to & PGOFSET) { 326 int cz = round_page((vaddr_t)to) - (vaddr_t)to; 327 328 pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; 329 bcopy(from, (caddr_t)pa, min(cz, len)); 330 from += cz; 331 to += cz; 332 len -= cz; 333 pte += 8; /* XXX */ 334 } 335 while (len > 0) { 336 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 337 bcopy(from, (caddr_t)pa, min(PAGE_SIZE, len)); 338 from += PAGE_SIZE; 339 to += PAGE_SIZE; 340 len -= PAGE_SIZE; 341 pte += 8; /* XXX */ 342 } 343 } 344 345 void 346 vsbus_copyfromproc(struct proc *p, caddr_t from, caddr_t to, int len) 347 { 348 struct pte *pte; 349 paddr_t pa; 350 351 if ((vaddr_t)from & KERNBASE) { /* In kernel space */ 352 bcopy(from, to, len); 353 return; 354 } 355 356 #ifdef DIAGNOSTIC 357 if (p == NULL) 358 panic("vsbus_copyfromproc: no proc"); 359 #endif 360 361 if ((vaddr_t)from & 0x40000000) 362 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[vax_btop((vaddr_t)from & ~0x40000000)]; 363 else 364 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[vax_btop((vaddr_t)from)]; 365 if ((vaddr_t)from & PGOFSET) { 366 int cz = round_page((vaddr_t)from) - (vaddr_t)from; 367 368 pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; 369 bcopy((caddr_t)pa, to, min(cz, len)); 370 from += cz; 371 to += cz; 372 len -= cz; 373 pte += 8; /* XXX */ 374 } 375 while (len > 0) { 376 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 377 bcopy((caddr_t)pa, to, min(PAGE_SIZE, len)); 378 from += PAGE_SIZE; 379 to += PAGE_SIZE; 380 len -= PAGE_SIZE; 381 pte += 8; /* XXX */ 382 } 383 } 384 385 /* 386 * There can only be one user of the DMA area on VS2k/VS3100 at one 387 * time, so keep track of it here. 388 */ 389 static int vsbus_active = 0; 390 391 void 392 vsbus_dma_start(struct vsbus_dma *vd) 393 { 394 395 SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q); 396 397 if (vsbus_active == 0) 398 vsbus_dma_intr(); 399 } 400 401 void 402 vsbus_dma_intr(void) 403 { 404 struct vsbus_dma *vd; 405 406 vd = SIMPLEQ_FIRST(&vsbus_dma); 407 if (vd == NULL) { 408 vsbus_active = 0; 409 return; 410 } 411 vsbus_active = 1; 412 SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd_q); 413 (*vd->vd_go)(vd->vd_arg); 414 } 415 416
Indexes created Tue Sep 30 07:10:03 GMT 2025