vsbus.c revision 1.54
1 /* $NetBSD: vsbus.c,v 1.54 2008/03/11 05:34:03 matt 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 1.54 2008/03/11 05:34:03 matt 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/mainbus.h> 68 #include <machine/vsbus.h> 69 70 #include "ioconf.h" 71 #include "locators.h" 72 #include "opt_cputype.h" 73 74 static int vsbus_match(device_t, cfdata_t, void *); 75 static void vsbus_attach(device_t, device_t, void *); 76 static int vsbus_print(void *, const char *); 77 static int vsbus_search(device_t, cfdata_t, const int *, void *); 78 79 static SIMPLEQ_HEAD(, vsbus_dma) vsbus_dma; 80 81 CFATTACH_DECL_NEW(vsbus, sizeof(struct vsbus_softc), 82 vsbus_match, vsbus_attach, NULL, NULL); 83 84 static struct vax_bus_dma_tag vsbus_bus_dma_tag = { 85 ._dmamap_create = _bus_dmamap_create, 86 ._dmamap_destroy = _bus_dmamap_destroy, 87 ._dmamap_load = _bus_dmamap_load, 88 ._dmamap_load_mbuf = _bus_dmamap_load_mbuf, 89 ._dmamap_load_uio = _bus_dmamap_load_uio, 90 ._dmamap_load_raw = _bus_dmamap_load_raw, 91 ._dmamap_unload = _bus_dmamap_unload, 92 ._dmamap_sync = _bus_dmamap_sync, 93 ._dmamem_alloc = _bus_dmamem_alloc, 94 ._dmamem_free = _bus_dmamem_free, 95 ._dmamem_map = _bus_dmamem_map, 96 ._dmamem_unmap = _bus_dmamem_unmap, 97 ._dmamem_mmap = _bus_dmamem_mmap, 98 }; 99 100 int 101 vsbus_print(void *aux, const char *name) 102 { 103 struct vsbus_attach_args * const va = aux; 104 105 aprint_normal(" csr 0x%lx vec %o ipl %x maskbit %d", va->va_paddr, 106 va->va_cvec & 511, va->va_br, va->va_maskno - 1); 107 return UNCONF; 108 } 109 110 int 111 vsbus_match(device_t parent, cfdata_t cf, void *aux) 112 { 113 struct mainbus_attach_args * const ma = aux; 114 115 return !strcmp("vsbus", ma->ma_type); 116 } 117 118 void 119 vsbus_attach(device_t parent, device_t self, void *aux) 120 { 121 struct mainbus_attach_args * const ma = aux; 122 struct vsbus_softc *sc = device_private(self); 123 int dbase, dsize; 124 125 aprint_normal("\n"); 126 127 sc->sc_dev = self; 128 sc->sc_iot = ma->ma_iot; 129 sc->sc_dmatag = vsbus_bus_dma_tag; 130 131 switch (vax_boardtype) { 132 #if VAX49 || VAX53 133 case VAX_BTYP_53: 134 case VAX_BTYP_49: 135 sc->sc_vsregs = vax_map_physmem(0x25c00000, 1); 136 sc->sc_intreq = (char *)sc->sc_vsregs + 12; 137 sc->sc_intclr = (char *)sc->sc_vsregs + 12; 138 sc->sc_intmsk = (char *)sc->sc_vsregs + 8; 139 vsbus_dma_init(sc, 8192); 140 break; 141 #endif 142 143 #if VAX46 || VAX48 144 case VAX_BTYP_48: 145 case VAX_BTYP_46: 146 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 147 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 148 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 149 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 150 vsbus_dma_init(sc, 32768); 151 #endif 152 153 default: 154 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 155 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 156 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 157 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 158 if (vax_boardtype == VAX_BTYP_410) { 159 dbase = KA410_DMA_BASE; 160 dsize = KA410_DMA_SIZE; 161 } else { 162 dbase = KA420_DMA_BASE; 163 dsize = KA420_DMA_SIZE; 164 *(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */ 165 } 166 sc->sc_dmasize = dsize; 167 sc->sc_dmaaddr = uvm_km_alloc(kernel_map, dsize, 0, 168 UVM_KMF_VAONLY); 169 ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG); 170 break; 171 } 172 173 SIMPLEQ_INIT(&vsbus_dma); 174 /* 175 * First: find which interrupts we won't care about. 176 * There are interrupts that interrupt on a periodic basic 177 * that we don't want to interfere with the rest of the 178 * interrupt probing. 179 */ 180 *sc->sc_intmsk = 0; 181 *sc->sc_intclr = 0xff; 182 DELAY(1000000); /* Wait a second */ 183 sc->sc_mask = *sc->sc_intreq; 184 aprint_normal_dev(self, "interrupt mask %x\n", sc->sc_mask); 185 /* 186 * now check for all possible devices on this "bus" 187 */ 188 config_search_ia(vsbus_search, self, "vsbus", NULL); 189 190 /* Autoconfig finished, enable interrupts */ 191 *sc->sc_intmsk = ~sc->sc_mask; 192 } 193 194 int 195 vsbus_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 196 { 197 struct vsbus_softc *sc = device_private(parent); 198 struct vsbus_attach_args va; 199 int i, vec, br; 200 u_char c; 201 202 va.va_paddr = cf->cf_loc[VSBUSCF_CSR]; 203 va.va_addr = vax_map_physmem(va.va_paddr, 1); 204 va.va_dmat = &sc->sc_dmatag; 205 va.va_memt = sc->sc_iot; 206 207 *sc->sc_intmsk = 0; 208 *sc->sc_intclr = 0xff; 209 scb_vecref(0, 0); /* Clear vector ref */ 210 211 i = config_match(parent, cf, &va); 212 vax_unmap_physmem(va.va_addr, 1); 213 c = *sc->sc_intreq & ~sc->sc_mask; 214 if (i == 0) 215 goto forgetit; 216 if (i > 10) 217 c = sc->sc_mask; /* Fooling interrupt */ 218 else if (c == 0) 219 goto forgetit; 220 221 *sc->sc_intmsk = c; 222 DELAY(100); 223 *sc->sc_intmsk = 0; 224 va.va_maskno = ffs((u_int)c); 225 i = scb_vecref(&vec, &br); 226 if (i == 0) 227 goto fail; 228 if (vec == 0) 229 goto fail; 230 231 va.va_br = br; 232 va.va_cvec = vec; 233 va.va_dmaaddr = sc->sc_dmaaddr; 234 va.va_dmasize = sc->sc_dmasize; 235 *sc->sc_intmsk = c; /* Allow interrupts during attach */ 236 config_attach(parent, cf, &va, vsbus_print); 237 *sc->sc_intmsk = 0; 238 return 0; 239 240 fail: 241 printf("%s%d at %s csr 0x%x %s\n", 242 cf->cf_name, cf->cf_unit, device_xname(parent), 243 cf->cf_loc[VSBUSCF_CSR], (i ? "zero vector" : "didn't interrupt")); 244 forgetit: 245 return 0; 246 } 247 248 /* 249 * Sets a new interrupt mask. Returns the old one. 250 * Works like spl functions. 251 */ 252 unsigned char 253 vsbus_setmask(int mask) 254 { 255 struct vsbus_softc * const sc = device_lookup_private(&vsbus_cd, 0); 256 unsigned char ch; 257 258 if (sc == NULL) 259 return 0; 260 261 ch = *sc->sc_intmsk; 262 *sc->sc_intmsk = mask; 263 return ch; 264 } 265 266 /* 267 * Clears the interrupts in mask. 268 */ 269 void 270 vsbus_clrintr(int mask) 271 { 272 struct vsbus_softc * const sc = device_lookup_private(&vsbus_cd, 0); 273 if (sc == NULL) 274 return; 275 276 *sc->sc_intclr = mask; 277 } 278 279 /* 280 * Copy data from/to a user process' space from the DMA area. 281 * Use the physical memory directly. 282 */ 283 void 284 vsbus_copytoproc(struct proc *p, void *fromv, void *tov, int len) 285 { 286 char *from = fromv, *to = tov; 287 struct pte *pte; 288 paddr_t pa; 289 290 if ((vaddr_t)to & KERNBASE) { /* In kernel space */ 291 bcopy(from, to, len); 292 return; 293 } 294 295 #ifdef DIAGNOSTIC 296 if (p == NULL) 297 panic("vsbus_copytoproc: no proc"); 298 #endif 299 300 if ((vaddr_t)to & 0x40000000) 301 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[vax_btop((vaddr_t)to & ~0x40000000)]; 302 else 303 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[vax_btop((vaddr_t)to)]; 304 if ((vaddr_t)to & PGOFSET) { 305 int cz = round_page((vaddr_t)to) - (vaddr_t)to; 306 307 pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; 308 bcopy(from, (void *)pa, min(cz, len)); 309 from += cz; 310 to += cz; 311 len -= cz; 312 pte += 8; /* XXX */ 313 } 314 while (len > 0) { 315 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 316 bcopy(from, (void *)pa, min(PAGE_SIZE, len)); 317 from += PAGE_SIZE; 318 to += PAGE_SIZE; 319 len -= PAGE_SIZE; 320 pte += 8; /* XXX */ 321 } 322 } 323 324 void 325 vsbus_copyfromproc(struct proc *p, void *fromv, void *tov, int len) 326 { 327 char *from = fromv, *to = tov; 328 struct pte *pte; 329 paddr_t pa; 330 331 if ((vaddr_t)from & KERNBASE) { /* In kernel space */ 332 bcopy(from, to, len); 333 return; 334 } 335 336 #ifdef DIAGNOSTIC 337 if (p == NULL) 338 panic("vsbus_copyfromproc: no proc"); 339 #endif 340 341 if ((vaddr_t)from & 0x40000000) 342 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[vax_btop((vaddr_t)from & ~0x40000000)]; 343 else 344 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[vax_btop((vaddr_t)from)]; 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) | (PAGE_SIZE - cz) | KERNBASE; 349 bcopy((void *)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((void *)pa, to, min(PAGE_SIZE, len)); 358 from += PAGE_SIZE; 359 to += PAGE_SIZE; 360 len -= PAGE_SIZE; 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 20:09:53 GMT 2025