vsbus.c revision 1.54.4.2
1 /* $NetBSD: vsbus.c,v 1.54.4.2 2010/03/11 15:03:06 yamt 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 1.54.4.2 2010/03/11 15:03:06 yamt 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/device.h> 46 #include <sys/disklabel.h> 47 #include <sys/syslog.h> 48 #include <sys/stat.h> 49 50 #include <uvm/uvm_extern.h> 51 52 #define _VAX_BUS_DMA_PRIVATE 53 #include <machine/bus.h> 54 #include <machine/pte.h> 55 #include <machine/sid.h> 56 #include <machine/scb.h> 57 #include <machine/cpu.h> 58 #include <machine/trap.h> 59 #include <machine/nexus.h> 60 61 #include <machine/uvax.h> 62 #include <machine/ka410.h> 63 #include <machine/ka420.h> 64 #include <machine/ka43.h> 65 66 #include <machine/mainbus.h> 67 #include <machine/vsbus.h> 68 69 #include "ioconf.h" 70 #include "locators.h" 71 #include "opt_cputype.h" 72 73 static int vsbus_match(device_t, cfdata_t, void *); 74 static void vsbus_attach(device_t, device_t, void *); 75 static int vsbus_print(void *, const char *); 76 static int vsbus_search(device_t, cfdata_t, const int *, void *); 77 78 static SIMPLEQ_HEAD(, vsbus_dma) vsbus_dma; 79 80 CFATTACH_DECL_NEW(vsbus, sizeof(struct vsbus_softc), 81 vsbus_match, vsbus_attach, NULL, NULL); 82 83 static struct vax_bus_dma_tag vsbus_bus_dma_tag = { 84 ._dmamap_create = _bus_dmamap_create, 85 ._dmamap_destroy = _bus_dmamap_destroy, 86 ._dmamap_load = _bus_dmamap_load, 87 ._dmamap_load_mbuf = _bus_dmamap_load_mbuf, 88 ._dmamap_load_uio = _bus_dmamap_load_uio, 89 ._dmamap_load_raw = _bus_dmamap_load_raw, 90 ._dmamap_unload = _bus_dmamap_unload, 91 ._dmamap_sync = _bus_dmamap_sync, 92 ._dmamem_alloc = _bus_dmamem_alloc, 93 ._dmamem_free = _bus_dmamem_free, 94 ._dmamem_map = _bus_dmamem_map, 95 ._dmamem_unmap = _bus_dmamem_unmap, 96 ._dmamem_mmap = _bus_dmamem_mmap, 97 }; 98 99 int 100 vsbus_print(void *aux, const char *name) 101 { 102 struct vsbus_attach_args * const va = aux; 103 104 aprint_normal(" csr 0x%lx vec %o ipl %x maskbit %d", va->va_paddr, 105 va->va_cvec & 511, va->va_br, va->va_maskno - 1); 106 return UNCONF; 107 } 108 109 int 110 vsbus_match(device_t parent, cfdata_t cf, void *aux) 111 { 112 struct mainbus_attach_args * const ma = aux; 113 114 return !strcmp("vsbus", ma->ma_type); 115 } 116 117 void 118 vsbus_attach(device_t parent, device_t self, void *aux) 119 { 120 struct mainbus_attach_args * const ma = aux; 121 struct vsbus_softc *sc = device_private(self); 122 int dbase, dsize; 123 124 aprint_normal("\n"); 125 126 sc->sc_dev = self; 127 sc->sc_iot = ma->ma_iot; 128 sc->sc_dmatag = vsbus_bus_dma_tag; 129 130 switch (vax_boardtype) { 131 #if VAX49 || VAX53 132 case VAX_BTYP_53: 133 case VAX_BTYP_49: 134 sc->sc_vsregs = vax_map_physmem(0x25c00000, 1); 135 sc->sc_intreq = (char *)sc->sc_vsregs + 12; 136 sc->sc_intclr = (char *)sc->sc_vsregs + 12; 137 sc->sc_intmsk = (char *)sc->sc_vsregs + 8; 138 vsbus_dma_init(sc, 8192); 139 break; 140 #endif 141 142 #if VAX46 || VAX48 143 case VAX_BTYP_48: 144 case VAX_BTYP_46: 145 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 146 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 147 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 148 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 149 vsbus_dma_init(sc, 32768); 150 #endif 151 152 default: 153 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 154 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 155 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 156 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 157 if (vax_boardtype == VAX_BTYP_410) { 158 dbase = KA410_DMA_BASE; 159 dsize = KA410_DMA_SIZE; 160 } else { 161 dbase = KA420_DMA_BASE; 162 dsize = KA420_DMA_SIZE; 163 *(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */ 164 } 165 sc->sc_dmasize = dsize; 166 sc->sc_dmaaddr = uvm_km_alloc(kernel_map, dsize, 0, 167 UVM_KMF_VAONLY); 168 ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG); 169 break; 170 } 171 172 SIMPLEQ_INIT(&vsbus_dma); 173 /* 174 * First: find which interrupts we won't care about. 175 * There are interrupts that interrupt on a periodic basic 176 * that we don't want to interfere with the rest of the 177 * interrupt probing. 178 */ 179 *sc->sc_intmsk = 0; 180 *sc->sc_intclr = 0xff; 181 DELAY(1000000); /* Wait a second */ 182 sc->sc_mask = *sc->sc_intreq; 183 aprint_normal_dev(self, "interrupt mask %x\n", sc->sc_mask); 184 /* 185 * now check for all possible devices on this "bus" 186 */ 187 config_search_ia(vsbus_search, self, "vsbus", NULL); 188 189 /* Autoconfig finished, enable interrupts */ 190 *sc->sc_intmsk = ~sc->sc_mask; 191 } 192 193 int 194 vsbus_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 195 { 196 struct vsbus_softc *sc = device_private(parent); 197 struct vsbus_attach_args va; 198 int i, vec, br; 199 u_char c; 200 201 va.va_paddr = cf->cf_loc[VSBUSCF_CSR]; 202 va.va_addr = vax_map_physmem(va.va_paddr, 1); 203 va.va_dmat = &sc->sc_dmatag; 204 va.va_memt = sc->sc_iot; 205 206 *sc->sc_intmsk = 0; 207 *sc->sc_intclr = 0xff; 208 scb_vecref(0, 0); /* Clear vector ref */ 209 210 i = config_match(parent, cf, &va); 211 vax_unmap_physmem(va.va_addr, 1); 212 c = *sc->sc_intreq & ~sc->sc_mask; 213 if (i == 0) 214 goto forgetit; 215 if (i > 10) 216 c = sc->sc_mask; /* Fooling interrupt */ 217 else if (c == 0) 218 goto forgetit; 219 220 *sc->sc_intmsk = c; 221 DELAY(100); 222 *sc->sc_intmsk = 0; 223 va.va_maskno = ffs((u_int)c); 224 i = scb_vecref(&vec, &br); 225 if (i == 0) 226 goto fail; 227 if (vec == 0) 228 goto fail; 229 230 va.va_br = br; 231 va.va_cvec = vec; 232 va.va_dmaaddr = sc->sc_dmaaddr; 233 va.va_dmasize = sc->sc_dmasize; 234 *sc->sc_intmsk = c; /* Allow interrupts during attach */ 235 config_attach(parent, cf, &va, vsbus_print); 236 *sc->sc_intmsk = 0; 237 return 0; 238 239 fail: 240 printf("%s%d at %s csr 0x%x %s\n", 241 cf->cf_name, cf->cf_unit, device_xname(parent), 242 cf->cf_loc[VSBUSCF_CSR], (i ? "zero vector" : "didn't interrupt")); 243 forgetit: 244 return 0; 245 } 246 247 /* 248 * Sets a new interrupt mask. Returns the old one. 249 * Works like spl functions. 250 */ 251 unsigned char 252 vsbus_setmask(int mask) 253 { 254 struct vsbus_softc * const sc = device_lookup_private(&vsbus_cd, 0); 255 unsigned char ch; 256 257 if (sc == NULL) 258 return 0; 259 260 ch = *sc->sc_intmsk; 261 *sc->sc_intmsk = mask; 262 return ch; 263 } 264 265 /* 266 * Clears the interrupts in mask. 267 */ 268 void 269 vsbus_clrintr(int mask) 270 { 271 struct vsbus_softc * const sc = device_lookup_private(&vsbus_cd, 0); 272 if (sc == NULL) 273 return; 274 275 *sc->sc_intclr = mask; 276 } 277 278 /* 279 * Copy data from/to a user process' space from the DMA area. 280 * Use the physical memory directly. 281 */ 282 void 283 vsbus_copytoproc(struct proc *p, void *fromv, void *tov, int len) 284 { 285 char *from = fromv, *to = tov; 286 struct pte *pte; 287 paddr_t pa; 288 289 if ((vaddr_t)to & KERNBASE) { /* In kernel space */ 290 memcpy(to, from, len); 291 return; 292 } 293 294 #ifdef DIAGNOSTIC 295 if (p == NULL) 296 panic("vsbus_copytoproc: no proc"); 297 #endif 298 299 if ((vaddr_t)to & 0x40000000) 300 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[vax_btop((vaddr_t)to & ~0x40000000)]; 301 else 302 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[vax_btop((vaddr_t)to)]; 303 if ((vaddr_t)to & PGOFSET) { 304 int cz = round_page((vaddr_t)to) - (vaddr_t)to; 305 306 pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; 307 memcpy((void *)pa, from, min(cz, len)); 308 from += cz; 309 to += cz; 310 len -= cz; 311 pte += 8; /* XXX */ 312 } 313 while (len > 0) { 314 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 315 memcpy((void *)pa, from, min(PAGE_SIZE, len)); 316 from += PAGE_SIZE; 317 to += PAGE_SIZE; 318 len -= PAGE_SIZE; 319 pte += 8; /* XXX */ 320 } 321 } 322 323 void 324 vsbus_copyfromproc(struct proc *p, void *fromv, void *tov, int len) 325 { 326 char *from = fromv, *to = tov; 327 struct pte *pte; 328 paddr_t pa; 329 330 if ((vaddr_t)from & KERNBASE) { /* In kernel space */ 331 memcpy(to, from, len); 332 return; 333 } 334 335 #ifdef DIAGNOSTIC 336 if (p == NULL) 337 panic("vsbus_copyfromproc: no proc"); 338 #endif 339 340 if ((vaddr_t)from & 0x40000000) 341 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[vax_btop((vaddr_t)from & ~0x40000000)]; 342 else 343 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[vax_btop((vaddr_t)from)]; 344 if ((vaddr_t)from & PGOFSET) { 345 int cz = round_page((vaddr_t)from) - (vaddr_t)from; 346 347 pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; 348 memcpy(to, (void *)pa, min(cz, len)); 349 from += cz; 350 to += cz; 351 len -= cz; 352 pte += 8; /* XXX */ 353 } 354 while (len > 0) { 355 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 356 memcpy(to, (void *)pa, min(PAGE_SIZE, len)); 357 from += PAGE_SIZE; 358 to += PAGE_SIZE; 359 len -= PAGE_SIZE; 360 pte += 8; /* XXX */ 361 } 362 } 363 364 /* 365 * There can only be one user of the DMA area on VS2k/VS3100 at one 366 * time, so keep track of it here. 367 */ 368 static int vsbus_active = 0; 369 370 void 371 vsbus_dma_start(struct vsbus_dma *vd) 372 { 373 374 SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q); 375 376 if (vsbus_active == 0) 377 vsbus_dma_intr(); 378 } 379 380 void 381 vsbus_dma_intr(void) 382 { 383 struct vsbus_dma *vd; 384 385 vd = SIMPLEQ_FIRST(&vsbus_dma); 386 if (vd == NULL) { 387 vsbus_active = 0; 388 return; 389 } 390 vsbus_active = 1; 391 SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd_q); 392 (*vd->vd_go)(vd->vd_arg); 393 } 394 395
Indexes created Sat Oct 25 16:10:12 GMT 2025