vsbus.c revision 1.62
1 /* $NetBSD: vsbus.c,v 1.62 2016/07/07 06:55:39 msaitoh 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 1.62 2016/07/07 06:55:39 msaitoh Exp $"); 37 38 #include "opt_cputype.h" 39 40 #define _VAX_BUS_DMA_PRIVATE 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/bus.h> 45 #include <sys/device.h> 46 47 #include <uvm/uvm_extern.h> 48 49 #include <machine/sid.h> 50 #include <machine/scb.h> 51 #include <machine/nexus.h> 52 53 #include <machine/uvax.h> 54 #include <machine/ka410.h> 55 #include <machine/ka420.h> 56 #include <machine/ka43.h> 57 58 #include <machine/mainbus.h> 59 #include <machine/vsbus.h> 60 61 #include "ioconf.h" 62 #include "locators.h" 63 64 static int vsbus_match(device_t, cfdata_t, void *); 65 static void vsbus_attach(device_t, device_t, void *); 66 static int vsbus_print(void *, const char *); 67 static int vsbus_search(device_t, cfdata_t, const int *, void *); 68 69 static SIMPLEQ_HEAD(, vsbus_dma) vsbus_dma; 70 71 CFATTACH_DECL_NEW(vsbus, sizeof(struct vsbus_softc), 72 vsbus_match, vsbus_attach, NULL, NULL); 73 74 static struct vax_bus_dma_tag vsbus_bus_dma_tag = { 75 ._dmamap_create = _bus_dmamap_create, 76 ._dmamap_destroy = _bus_dmamap_destroy, 77 ._dmamap_load = _bus_dmamap_load, 78 ._dmamap_load_mbuf = _bus_dmamap_load_mbuf, 79 ._dmamap_load_uio = _bus_dmamap_load_uio, 80 ._dmamap_load_raw = _bus_dmamap_load_raw, 81 ._dmamap_unload = _bus_dmamap_unload, 82 ._dmamap_sync = _bus_dmamap_sync, 83 ._dmamem_alloc = _bus_dmamem_alloc, 84 ._dmamem_free = _bus_dmamem_free, 85 ._dmamem_map = _bus_dmamem_map, 86 ._dmamem_unmap = _bus_dmamem_unmap, 87 ._dmamem_mmap = _bus_dmamem_mmap, 88 }; 89 90 int 91 vsbus_print(void *aux, const char *name) 92 { 93 struct vsbus_attach_args * const va = aux; 94 95 aprint_normal(" csr 0x%lx vec %o ipl %x maskbit %d", va->va_paddr, 96 va->va_cvec & 511, va->va_br, va->va_maskno - 1); 97 return UNCONF; 98 } 99 100 int 101 vsbus_match(device_t parent, cfdata_t cf, void *aux) 102 { 103 struct mainbus_attach_args * const ma = aux; 104 105 return !strcmp("vsbus", ma->ma_type); 106 } 107 108 void 109 vsbus_attach(device_t parent, device_t self, void *aux) 110 { 111 struct mainbus_attach_args * const ma = aux; 112 struct vsbus_softc *sc = device_private(self); 113 int dbase, dsize; 114 115 aprint_normal("\n"); 116 117 sc->sc_dev = self; 118 sc->sc_iot = ma->ma_iot; 119 sc->sc_dmatag = vsbus_bus_dma_tag; 120 121 switch (vax_boardtype) { 122 #if VAX49 || VAX53 123 case VAX_BTYP_53: 124 case VAX_BTYP_49: 125 sc->sc_vsregs = vax_map_physmem(VS_REGS_KA49, 1); 126 sc->sc_intreq = (char *)sc->sc_vsregs + 12; 127 sc->sc_intclr = (char *)sc->sc_vsregs + 12; 128 sc->sc_intmsk = (char *)sc->sc_vsregs + 8; 129 vsbus_dma_init(sc, 8192); 130 break; 131 #endif 132 133 #if VAX46 || VAX48 134 case VAX_BTYP_48: 135 case VAX_BTYP_46: 136 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 137 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 138 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 139 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 140 vsbus_dma_init(sc, 32768); 141 break; 142 #endif 143 144 default: 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 if (vax_boardtype == VAX_BTYP_410) { 150 dbase = KA410_DMA_BASE; 151 dsize = KA410_DMA_SIZE; 152 } else { 153 dbase = KA420_DMA_BASE; 154 dsize = KA420_DMA_SIZE; 155 *(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */ 156 } 157 sc->sc_dmasize = dsize; 158 sc->sc_dmaaddr = uvm_km_alloc(kernel_map, dsize, 0, 159 UVM_KMF_VAONLY); 160 ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG); 161 break; 162 } 163 164 SIMPLEQ_INIT(&vsbus_dma); 165 /* 166 * First: find which interrupts we won't care about. 167 * There are interrupts that interrupt on a periodic basic 168 * that we don't want to interfere with the rest of the 169 * interrupt probing. 170 */ 171 *sc->sc_intmsk = 0; 172 *sc->sc_intclr = 0xff; 173 DELAY(1000000); /* Wait a second */ 174 sc->sc_mask = *sc->sc_intreq; 175 aprint_normal_dev(self, "interrupt mask %x\n", sc->sc_mask); 176 /* 177 * now check for all possible devices on this "bus" 178 */ 179 config_search_ia(vsbus_search, self, "vsbus", NULL); 180 181 /* Autoconfig finished, enable interrupts */ 182 *sc->sc_intmsk = ~sc->sc_mask; 183 } 184 185 int 186 vsbus_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 187 { 188 struct vsbus_softc *sc = device_private(parent); 189 struct vsbus_attach_args va; 190 int i, vec, br; 191 u_char c; 192 193 va.va_paddr = cf->cf_loc[VSBUSCF_CSR]; 194 va.va_addr = vax_map_physmem(va.va_paddr, 1); 195 va.va_dmat = &sc->sc_dmatag; 196 va.va_memt = sc->sc_iot; 197 198 *sc->sc_intmsk = 0; 199 *sc->sc_intclr = 0xff; 200 scb_vecref(0, 0); /* Clear vector ref */ 201 202 i = config_match(parent, cf, &va); 203 vax_unmap_physmem(va.va_addr, 1); 204 c = *sc->sc_intreq & ~sc->sc_mask; 205 if (i == 0) 206 goto forgetit; 207 if (i > 10) 208 c = sc->sc_mask; /* Fooling interrupt */ 209 else if (c == 0) 210 goto forgetit; 211 212 *sc->sc_intmsk = c; 213 DELAY(100); 214 *sc->sc_intmsk = 0; 215 va.va_maskno = ffs((u_int)c); 216 i = scb_vecref(&vec, &br); 217 if (i == 0) 218 goto fail; 219 if (vec == 0) 220 goto fail; 221 222 va.va_br = br; 223 va.va_cvec = vec; 224 va.va_dmaaddr = sc->sc_dmaaddr; 225 va.va_dmasize = sc->sc_dmasize; 226 *sc->sc_intmsk = c; /* Allow interrupts during attach */ 227 config_attach(parent, cf, &va, vsbus_print); 228 *sc->sc_intmsk = 0; 229 return 0; 230 231 fail: 232 printf("%s%d at %s csr 0x%x %s\n", 233 cf->cf_name, cf->cf_unit, device_xname(parent), 234 cf->cf_loc[VSBUSCF_CSR], (i ? "zero vector" : "didn't interrupt")); 235 forgetit: 236 return 0; 237 } 238 239 /* 240 * Sets a new interrupt mask. Returns the old one. 241 * Works like spl functions. 242 */ 243 unsigned char 244 vsbus_setmask(int mask) 245 { 246 struct vsbus_softc * const sc = device_lookup_private(&vsbus_cd, 0); 247 unsigned char ch; 248 249 if (sc == NULL) 250 return 0; 251 252 ch = *sc->sc_intmsk; 253 *sc->sc_intmsk = mask; 254 return ch; 255 } 256 257 /* 258 * Clears the interrupts in mask. 259 */ 260 void 261 vsbus_clrintr(int mask) 262 { 263 struct vsbus_softc * const sc = device_lookup_private(&vsbus_cd, 0); 264 if (sc == NULL) 265 return; 266 267 *sc->sc_intclr = mask; 268 } 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 pte *pte; 279 paddr_t pa; 280 281 if ((vaddr_t)to & KERNBASE) { /* In kernel space */ 282 memcpy(to, from, len); 283 return; 284 } 285 286 #ifdef DIAGNOSTIC 287 if (p == NULL) 288 panic("vsbus_copytoproc: no proc"); 289 #endif 290 291 if ((vaddr_t)to & 0x40000000) 292 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[vax_btop((vaddr_t)to & ~0x40000000)]; 293 else 294 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[vax_btop((vaddr_t)to)]; 295 if ((vaddr_t)to & PGOFSET) { 296 int cz = round_page((vaddr_t)to) - (vaddr_t)to; 297 298 pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; 299 memcpy((void *)pa, from, min(cz, len)); 300 from += cz; 301 to += cz; 302 len -= cz; 303 pte += 8; /* XXX */ 304 } 305 while (len > 0) { 306 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 307 memcpy((void *)pa, from, min(PAGE_SIZE, len)); 308 from += PAGE_SIZE; 309 to += PAGE_SIZE; 310 len -= PAGE_SIZE; 311 pte += 8; /* XXX */ 312 } 313 } 314 315 void 316 vsbus_copyfromproc(struct proc *p, void *fromv, void *tov, int len) 317 { 318 char *from = fromv, *to = tov; 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 if ((vaddr_t)from & 0x40000000) 333 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[vax_btop((vaddr_t)from & ~0x40000000)]; 334 else 335 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[vax_btop((vaddr_t)from)]; 336 if ((vaddr_t)from & PGOFSET) { 337 int cz = round_page((vaddr_t)from) - (vaddr_t)from; 338 339 pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; 340 memcpy(to, (void *)pa, min(cz, len)); 341 from += cz; 342 to += cz; 343 len -= cz; 344 pte += 8; /* XXX */ 345 } 346 while (len > 0) { 347 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 348 memcpy(to, (void *)pa, min(PAGE_SIZE, len)); 349 from += PAGE_SIZE; 350 to += PAGE_SIZE; 351 len -= PAGE_SIZE; 352 pte += 8; /* XXX */ 353 } 354 } 355 356 /* 357 * There can only be one user of the DMA area on VS2k/VS3100 at one 358 * time, so keep track of it here. 359 */ 360 static int vsbus_active = 0; 361 362 void 363 vsbus_dma_start(struct vsbus_dma *vd) 364 { 365 366 SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q); 367 368 if (vsbus_active == 0) 369 vsbus_dma_intr(); 370 } 371 372 void 373 vsbus_dma_intr(void) 374 { 375 struct vsbus_dma *vd; 376 377 vd = SIMPLEQ_FIRST(&vsbus_dma); 378 if (vd == NULL) { 379 vsbus_active = 0; 380 return; 381 } 382 vsbus_active = 1; 383 SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd_q); 384 (*vd->vd_go)(vd->vd_arg); 385 } 386 387
Indexes created Tue Sep 30 06:09:59 GMT 2025