vsbus.c revision 1.67
1 /* $NetBSD: vsbus.c,v 1.67 2021/08/07 16:19:07 thorpej 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 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: vsbus.c,v 1.67 2021/08/07 16:19:07 thorpej Exp $"); 31 32 #include "opt_cputype.h" 33 34 #define _VAX_BUS_DMA_PRIVATE 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/bus.h> 39 #include <sys/device.h> 40 41 #include <uvm/uvm_extern.h> 42 43 #include <machine/sid.h> 44 #include <machine/scb.h> 45 #include <machine/nexus.h> 46 47 #include <machine/uvax.h> 48 #include <machine/ka410.h> 49 #include <machine/ka420.h> 50 #include <machine/ka43.h> 51 52 #include <machine/mainbus.h> 53 #include <machine/vsbus.h> 54 55 #include "ioconf.h" 56 #include "locators.h" 57 58 static int vsbus_match(device_t, cfdata_t, void *); 59 static void vsbus_attach(device_t, device_t, void *); 60 static int vsbus_print(void *, const char *); 61 static int vsbus_search(device_t, cfdata_t, const int *, void *); 62 63 static SIMPLEQ_HEAD(, vsbus_dma) vsbus_dma; 64 65 CFATTACH_DECL_NEW(vsbus, sizeof(struct vsbus_softc), 66 vsbus_match, vsbus_attach, NULL, NULL); 67 68 static struct vax_bus_dma_tag vsbus_bus_dma_tag = { 69 ._dmamap_create = _bus_dmamap_create, 70 ._dmamap_destroy = _bus_dmamap_destroy, 71 ._dmamap_load = _bus_dmamap_load, 72 ._dmamap_load_mbuf = _bus_dmamap_load_mbuf, 73 ._dmamap_load_uio = _bus_dmamap_load_uio, 74 ._dmamap_load_raw = _bus_dmamap_load_raw, 75 ._dmamap_unload = _bus_dmamap_unload, 76 ._dmamap_sync = _bus_dmamap_sync, 77 ._dmamem_alloc = _bus_dmamem_alloc, 78 ._dmamem_free = _bus_dmamem_free, 79 ._dmamem_map = _bus_dmamem_map, 80 ._dmamem_unmap = _bus_dmamem_unmap, 81 ._dmamem_mmap = _bus_dmamem_mmap, 82 }; 83 84 int 85 vsbus_print(void *aux, const char *name) 86 { 87 struct vsbus_attach_args * const va = aux; 88 89 aprint_normal(" csr 0x%lx vec %o ipl %x maskbit %d", va->va_paddr, 90 va->va_cvec & 511, va->va_br, va->va_maskno - 1); 91 return UNCONF; 92 } 93 94 int 95 vsbus_match(device_t parent, cfdata_t cf, void *aux) 96 { 97 struct mainbus_attach_args * const ma = aux; 98 99 return !strcmp("vsbus", ma->ma_type); 100 } 101 102 void 103 vsbus_attach(device_t parent, device_t self, void *aux) 104 { 105 struct mainbus_attach_args * const ma = aux; 106 struct vsbus_softc *sc = device_private(self); 107 int dbase, dsize; 108 109 aprint_normal("\n"); 110 111 sc->sc_dev = self; 112 sc->sc_iot = ma->ma_iot; 113 sc->sc_dmatag = vsbus_bus_dma_tag; 114 115 switch (vax_boardtype) { 116 #if VAX49 || VAX53 117 case VAX_BTYP_53: 118 case VAX_BTYP_49: 119 sc->sc_vsregs = vax_map_physmem(VS_REGS_KA49, 1); 120 sc->sc_intreq = (char *)sc->sc_vsregs + 12; 121 sc->sc_intclr = (char *)sc->sc_vsregs + 12; 122 sc->sc_intmsk = (char *)sc->sc_vsregs + 8; 123 vsbus_dma_init(sc, 8192); 124 break; 125 #endif 126 127 #if VAX46 || VAX48 128 case VAX_BTYP_48: 129 case VAX_BTYP_46: 130 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 131 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 132 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 133 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 134 vsbus_dma_init(sc, 32768); 135 break; 136 #endif 137 138 default: 139 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 140 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 141 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 142 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 143 if (vax_boardtype == VAX_BTYP_410) { 144 dbase = KA410_DMA_BASE; 145 dsize = KA410_DMA_SIZE; 146 } else { 147 dbase = KA420_DMA_BASE; 148 dsize = KA420_DMA_SIZE; 149 *(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */ 150 } 151 sc->sc_dmasize = dsize; 152 sc->sc_dmaaddr = uvm_km_alloc(kernel_map, dsize, 0, 153 UVM_KMF_VAONLY); 154 ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG); 155 break; 156 } 157 158 SIMPLEQ_INIT(&vsbus_dma); 159 /* 160 * First: find which interrupts we won't care about. 161 * There are interrupts that interrupt on a periodic basic 162 * that we don't want to interfere with the rest of the 163 * interrupt probing. 164 */ 165 *sc->sc_intmsk = 0; 166 *sc->sc_intclr = 0xff; 167 DELAY(1000000); /* Wait a second */ 168 sc->sc_mask = *sc->sc_intreq; 169 aprint_normal_dev(self, "interrupt mask %x\n", sc->sc_mask); 170 /* 171 * now check for all possible devices on this "bus" 172 */ 173 config_search(self, NULL, 174 CFARGS(.search = vsbus_search)); 175 176 /* Autoconfig finished, enable interrupts */ 177 *sc->sc_intmsk = ~sc->sc_mask; 178 } 179 180 int 181 vsbus_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 182 { 183 struct vsbus_softc *sc = device_private(parent); 184 struct vsbus_attach_args va; 185 int i, vec, br; 186 u_char c; 187 188 va.va_paddr = cf->cf_loc[VSBUSCF_CSR]; 189 va.va_addr = vax_map_physmem(va.va_paddr, 1); 190 va.va_dmat = &sc->sc_dmatag; 191 va.va_memt = sc->sc_iot; 192 193 *sc->sc_intmsk = 0; 194 *sc->sc_intclr = 0xff; 195 scb_vecref(0, 0); /* Clear vector ref */ 196 197 i = config_probe(parent, cf, &va); 198 vax_unmap_physmem(va.va_addr, 1); 199 c = *sc->sc_intreq & ~sc->sc_mask; 200 if (i == 0) 201 goto forgetit; 202 if (i > 10) 203 c = sc->sc_mask; /* Fooling interrupt */ 204 else if (c == 0) 205 goto forgetit; 206 207 *sc->sc_intmsk = c; 208 DELAY(100); 209 *sc->sc_intmsk = 0; 210 va.va_maskno = ffs((u_int)c); 211 i = scb_vecref(&vec, &br); 212 if (i == 0) 213 goto fail; 214 if (vec == 0) 215 goto fail; 216 217 va.va_br = br; 218 va.va_cvec = vec; 219 va.va_dmaaddr = sc->sc_dmaaddr; 220 va.va_dmasize = sc->sc_dmasize; 221 *sc->sc_intmsk = c; /* Allow interrupts during attach */ 222 config_attach(parent, cf, &va, vsbus_print, CFARGS_NONE); 223 *sc->sc_intmsk = 0; 224 return 0; 225 226 fail: 227 printf("%s%d at %s csr 0x%x %s\n", 228 cf->cf_name, cf->cf_unit, device_xname(parent), 229 cf->cf_loc[VSBUSCF_CSR], (i ? "zero vector" : "didn't interrupt")); 230 forgetit: 231 return 0; 232 } 233 234 /* 235 * Sets a new interrupt mask. Returns the old one. 236 * Works like spl functions. 237 */ 238 unsigned char 239 vsbus_setmask(int mask) 240 { 241 struct vsbus_softc * const sc = device_lookup_private(&vsbus_cd, 0); 242 unsigned char ch; 243 244 if (sc == NULL) 245 return 0; 246 247 ch = *sc->sc_intmsk; 248 *sc->sc_intmsk = mask; 249 return ch; 250 } 251 252 /* 253 * Clears the interrupts in mask. 254 */ 255 void 256 vsbus_clrintr(int mask) 257 { 258 struct vsbus_softc * const sc = device_lookup_private(&vsbus_cd, 0); 259 if (sc == NULL) 260 return; 261 262 *sc->sc_intclr = mask; 263 } 264 265 #define puvtopte(va, pmap) \ 266 (((vaddr_t)va < 0x40000000) ? \ 267 &(((pmap)->pm_p0br)[PG_PFNUM(va)]) : \ 268 &(((pmap)->pm_p1br)[PG_PFNUM(va)])) 269 270 /* 271 * Copy data from/to a user process' space from the DMA area. 272 * Use the physical memory directly. 273 */ 274 void 275 vsbus_copytoproc(struct proc *p, void *fromv, void *tov, int len) 276 { 277 char *from = fromv, *to = tov; 278 struct pmap *pm; 279 struct pte *pte; 280 paddr_t pa; 281 282 if ((vaddr_t)to & KERNBASE) { /* In kernel space */ 283 memcpy(to, from, len); 284 return; 285 } 286 287 #ifdef DIAGNOSTIC 288 if (p == NULL) 289 panic("vsbus_copytoproc: no proc"); 290 #endif 291 292 pm = p->p_vmspace->vm_map.pmap; 293 pte = puvtopte(trunc_page((vaddr_t)to), pm); 294 if ((vaddr_t)to & PGOFSET) { 295 int cz = round_page((vaddr_t)to) - (vaddr_t)to; 296 297 pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; 298 memcpy((void *)pa, from, uimin(cz, len)); 299 from += cz; 300 to += cz; 301 len -= cz; 302 pte += 8; /* XXX */ 303 } 304 while (len > 0) { 305 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 306 memcpy((void *)pa, from, uimin(PAGE_SIZE, len)); 307 from += PAGE_SIZE; 308 to += PAGE_SIZE; 309 len -= PAGE_SIZE; 310 pte += 8; /* XXX */ 311 } 312 } 313 314 void 315 vsbus_copyfromproc(struct proc *p, void *fromv, void *tov, int len) 316 { 317 char *from = fromv, *to = tov; 318 struct pmap *pm; 319 struct pte *pte; 320 paddr_t pa; 321 322 if ((vaddr_t)from & KERNBASE) { /* In kernel space */ 323 memcpy(to, from, len); 324 return; 325 } 326 327 #ifdef DIAGNOSTIC 328 if (p == NULL) 329 panic("vsbus_copyfromproc: no proc"); 330 #endif 331 332 pm = p->p_vmspace->vm_map.pmap; 333 pte = puvtopte(trunc_page((vaddr_t)from), pm); 334 if ((vaddr_t)from & PGOFSET) { 335 int cz = round_page((vaddr_t)from) - (vaddr_t)from; 336 337 pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; 338 memcpy(to, (void *)pa, uimin(cz, len)); 339 from += cz; 340 to += cz; 341 len -= cz; 342 pte += 8; /* XXX */ 343 } 344 while (len > 0) { 345 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 346 memcpy(to, (void *)pa, uimin(PAGE_SIZE, len)); 347 from += PAGE_SIZE; 348 to += PAGE_SIZE; 349 len -= PAGE_SIZE; 350 pte += 8; /* XXX */ 351 } 352 } 353 354 /* 355 * There can only be one user of the DMA area on VS2k/VS3100 at one 356 * time, so keep track of it here. 357 */ 358 static int vsbus_active = 0; 359 360 void 361 vsbus_dma_start(struct vsbus_dma *vd) 362 { 363 364 SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q); 365 366 if (vsbus_active == 0) 367 vsbus_dma_intr(); 368 } 369 370 void 371 vsbus_dma_intr(void) 372 { 373 struct vsbus_dma *vd; 374 375 vd = SIMPLEQ_FIRST(&vsbus_dma); 376 if (vd == NULL) { 377 vsbus_active = 0; 378 return; 379 } 380 vsbus_active = 1; 381 SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd_q); 382 (*vd->vd_go)(vd->vd_arg); 383 } 384 385
Indexes created Tue Sep 30 17:09:57 GMT 2025