1 /* $NetBSD: vsbus.c,v 1.44 2003/07/15 02:15:07 lukem 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 1.44 2003/07/15 02:15:07 lukem 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 "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 CFATTACH_DECL(vsbus, sizeof(struct vsbus_softc), 103 vsbus_match, vsbus_attach, NULL, NULL); 104 105 int 106 vsbus_print(aux, name) 107 void *aux; 108 const char *name; 109 { 110 struct vsbus_attach_args *va = aux; 111 112 aprint_normal(" csr 0x%lx vec %o ipl %x maskbit %d", va->va_paddr, 113 va->va_cvec & 511, va->va_br, va->va_maskno - 1); 114 return(UNCONF); 115 } 116 117 int 118 vsbus_match(parent, cf, aux) 119 struct device *parent; 120 struct cfdata *cf; 121 void *aux; 122 { 123 #if VAX53 || VAXANY 124 /* Kludge: VAX53 is... special */ 125 if (vax_boardtype == VAX_BTYP_53 && (int)aux == 1) 126 return 1; /* Hack */ 127 #endif 128 if (vax_bustype == VAX_VSBUS) 129 return 1; 130 return 0; 131 } 132 133 void 134 vsbus_attach(parent, self, aux) 135 struct device *parent, *self; 136 void *aux; 137 { 138 struct vsbus_softc *sc = (void *)self; 139 int dbase, dsize; 140 141 printf("\n"); 142 143 sc->sc_dmatag = vsbus_bus_dma_tag; 144 145 switch (vax_boardtype) { 146 #if VAX49 || VAX53 147 case VAX_BTYP_53: 148 case VAX_BTYP_49: 149 sc->sc_vsregs = vax_map_physmem(0x25c00000, 1); 150 sc->sc_intreq = (char *)sc->sc_vsregs + 12; 151 sc->sc_intclr = (char *)sc->sc_vsregs + 12; 152 sc->sc_intmsk = (char *)sc->sc_vsregs + 8; 153 vsbus_dma_init(sc, 8192); 154 break; 155 #endif 156 157 #if VAX46 || VAX48 158 case VAX_BTYP_48: 159 case VAX_BTYP_46: 160 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 161 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 162 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 163 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 164 vsbus_dma_init(sc, 32768); 165 #endif 166 167 default: 168 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 169 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 170 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 171 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 172 if (vax_boardtype == VAX_BTYP_410) { 173 dbase = KA410_DMA_BASE; 174 dsize = KA410_DMA_SIZE; 175 } else { 176 dbase = KA420_DMA_BASE; 177 dsize = KA420_DMA_SIZE; 178 *(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */ 179 } 180 sc->sc_dmasize = dsize; 181 sc->sc_dmaaddr = uvm_km_valloc(kernel_map, dsize); 182 ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG); 183 break; 184 } 185 186 SIMPLEQ_INIT(&vsbus_dma); 187 /* 188 * First: find which interrupts we won't care about. 189 * There are interrupts that interrupt on a periodic basic 190 * that we don't want to interfere with the rest of the 191 * interrupt probing. 192 */ 193 *sc->sc_intmsk = 0; 194 *sc->sc_intclr = 0xff; 195 DELAY(1000000); /* Wait a second */ 196 sc->sc_mask = *sc->sc_intreq; 197 printf("%s: interrupt mask %x\n", self->dv_xname, sc->sc_mask); 198 /* 199 * now check for all possible devices on this "bus" 200 */ 201 config_search(vsbus_search, self, NULL); 202 203 /* Autoconfig finished, enable interrupts */ 204 *sc->sc_intmsk = ~sc->sc_mask; 205 } 206 207 int 208 vsbus_search(parent, cf, aux) 209 struct device *parent; 210 struct cfdata *cf; 211 void *aux; 212 { 213 struct vsbus_softc *sc = (void *)parent; 214 struct vsbus_attach_args va; 215 int i, vec, br; 216 u_char c; 217 218 va.va_paddr = cf->cf_loc[0]; 219 va.va_addr = vax_map_physmem(va.va_paddr, 1); 220 va.va_dmat = &sc->sc_dmatag; 221 va.va_iot = &vax_mem_bus_space; 222 223 *sc->sc_intmsk = 0; 224 *sc->sc_intclr = 0xff; 225 scb_vecref(0, 0); /* Clear vector ref */ 226 227 i = config_match(parent, cf, &va); 228 vax_unmap_physmem(va.va_addr, 1); 229 c = *sc->sc_intreq & ~sc->sc_mask; 230 if (i == 0) 231 goto forgetit; 232 if (i > 10) 233 c = sc->sc_mask; /* Fooling interrupt */ 234 else if (c == 0) 235 goto forgetit; 236 237 *sc->sc_intmsk = c; 238 DELAY(100); 239 *sc->sc_intmsk = 0; 240 va.va_maskno = ffs((u_int)c); 241 i = scb_vecref(&vec, &br); 242 if (i == 0) 243 goto fail; 244 if (vec == 0) 245 goto fail; 246 247 va.va_br = br; 248 va.va_cvec = vec; 249 va.va_dmaaddr = sc->sc_dmaaddr; 250 va.va_dmasize = sc->sc_dmasize; 251 *sc->sc_intmsk = c; /* Allow interrupts during attach */ 252 config_attach(parent, cf, &va, vsbus_print); 253 *sc->sc_intmsk = 0; 254 return 0; 255 256 fail: 257 printf("%s%d at %s csr 0x%x %s\n", 258 cf->cf_name, cf->cf_unit, parent->dv_xname, 259 cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt")); 260 forgetit: 261 return 0; 262 } 263 264 /* 265 * Sets a new interrupt mask. Returns the old one. 266 * Works like spl functions. 267 */ 268 unsigned char 269 vsbus_setmask(mask) 270 unsigned char mask; 271 { 272 struct vsbus_softc *sc; 273 unsigned char ch; 274 275 if (vsbus_cd.cd_ndevs == 0) 276 return 0; 277 sc = vsbus_cd.cd_devs[0]; 278 279 ch = *sc->sc_intmsk; 280 *sc->sc_intmsk = mask; 281 return ch; 282 } 283 284 /* 285 * Clears the interrupts in mask. 286 */ 287 void 288 vsbus_clrintr(mask) 289 unsigned char mask; 290 { 291 struct vsbus_softc *sc; 292 293 if (vsbus_cd.cd_ndevs == 0) 294 return; 295 sc = vsbus_cd.cd_devs[0]; 296 297 *sc->sc_intclr = mask; 298 } 299 300 /* 301 * Copy data from/to a user process' space from the DMA area. 302 * Use the physical memory directly. 303 */ 304 void 305 vsbus_copytoproc(struct proc *p, caddr_t from, caddr_t to, int len) 306 { 307 struct pte *pte; 308 paddr_t pa; 309 310 if ((vaddr_t)to & KERNBASE) { /* In kernel space */ 311 bcopy(from, to, len); 312 return; 313 } 314 if ((long)to & 0x40000000) 315 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[((long)to & ~0x40000000)]; 316 else 317 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[(long)to]; 318 if ((vaddr_t)to & PGOFSET) { 319 int cz = round_page((vaddr_t)to) - (vaddr_t)to; 320 321 pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; 322 bcopy(from, (caddr_t)pa, min(cz, len)); 323 from += cz; 324 to += cz; 325 len -= cz; 326 pte += 8; /* XXX */ 327 } 328 while (len > 0) { 329 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 330 bcopy(from, (caddr_t)pa, min(PAGE_SIZE, len)); 331 from += PAGE_SIZE; 332 to += PAGE_SIZE; 333 len -= PAGE_SIZE; 334 pte += 8; /* XXX */ 335 } 336 } 337 338 void 339 vsbus_copyfromproc(struct proc *p, caddr_t from, caddr_t to, int len) 340 { 341 struct pte *pte; 342 paddr_t pa; 343 344 if ((vaddr_t)from & KERNBASE) { /* In kernel space */ 345 bcopy(from, to, len); 346 return; 347 } 348 if ((long)to & 0x40000000) 349 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[((long)to & ~0x40000000)]; 350 else 351 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[(long)to]; 352 if ((vaddr_t)from & PGOFSET) { 353 int cz = round_page((vaddr_t)from) - (vaddr_t)from; 354 355 pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; 356 bcopy((caddr_t)pa, to, min(cz, len)); 357 from += cz; 358 to += cz; 359 len -= cz; 360 pte += 8; /* XXX */ 361 } 362 while (len > 0) { 363 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 364 bcopy((caddr_t)pa, to, min(PAGE_SIZE, len)); 365 from += PAGE_SIZE; 366 to += PAGE_SIZE; 367 len -= PAGE_SIZE; 368 pte += 8; /* XXX */ 369 } 370 } 371 372 /* 373 * There can only be one user of the DMA area on VS2k/VS3100 at one 374 * time, so keep track of it here. 375 */ 376 static int vsbus_active = 0; 377 378 void 379 vsbus_dma_start(struct vsbus_dma *vd) 380 { 381 382 SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q); 383 384 if (vsbus_active == 0) 385 vsbus_dma_intr(); 386 } 387 388 void 389 vsbus_dma_intr(void) 390 { 391 struct vsbus_dma *vd; 392 393 vd = SIMPLEQ_FIRST(&vsbus_dma); 394 if (vd == NULL) { 395 vsbus_active = 0; 396 return; 397 } 398 vsbus_active = 1; 399 SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd_q); 400 (*vd->vd_go)(vd->vd_arg); 401 } 402 403