1 /* $NetBSD: vsbus.c,v 1.60 2012/06/28 13:58:21 abs 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 1.60 2012/06/28 13:58:21 abs 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 #endif 142 143 default: 144 sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); 145 sc->sc_intreq = (char *)sc->sc_vsregs + 15; 146 sc->sc_intclr = (char *)sc->sc_vsregs + 15; 147 sc->sc_intmsk = (char *)sc->sc_vsregs + 12; 148 if (vax_boardtype == VAX_BTYP_410) { 149 dbase = KA410_DMA_BASE; 150 dsize = KA410_DMA_SIZE; 151 } else { 152 dbase = KA420_DMA_BASE; 153 dsize = KA420_DMA_SIZE; 154 *(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */ 155 } 156 sc->sc_dmasize = dsize; 157 sc->sc_dmaaddr = uvm_km_alloc(kernel_map, dsize, 0, 158 UVM_KMF_VAONLY); 159 ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG); 160 break; 161 } 162 163 SIMPLEQ_INIT(&vsbus_dma); 164 /* 165 * First: find which interrupts we won't care about. 166 * There are interrupts that interrupt on a periodic basic 167 * that we don't want to interfere with the rest of the 168 * interrupt probing. 169 */ 170 *sc->sc_intmsk = 0; 171 *sc->sc_intclr = 0xff; 172 DELAY(1000000); /* Wait a second */ 173 sc->sc_mask = *sc->sc_intreq; 174 aprint_normal_dev(self, "interrupt mask %x\n", sc->sc_mask); 175 /* 176 * now check for all possible devices on this "bus" 177 */ 178 config_search_ia(vsbus_search, self, "vsbus", NULL); 179 180 /* Autoconfig finished, enable interrupts */ 181 *sc->sc_intmsk = ~sc->sc_mask; 182 } 183 184 int 185 vsbus_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 186 { 187 struct vsbus_softc *sc = device_private(parent); 188 struct vsbus_attach_args va; 189 int i, vec, br; 190 u_char c; 191 192 va.va_paddr = cf->cf_loc[VSBUSCF_CSR]; 193 va.va_addr = vax_map_physmem(va.va_paddr, 1); 194 va.va_dmat = &sc->sc_dmatag; 195 va.va_memt = sc->sc_iot; 196 197 *sc->sc_intmsk = 0; 198 *sc->sc_intclr = 0xff; 199 scb_vecref(0, 0); /* Clear vector ref */ 200 201 i = config_match(parent, cf, &va); 202 vax_unmap_physmem(va.va_addr, 1); 203 c = *sc->sc_intreq & ~sc->sc_mask; 204 if (i == 0) 205 goto forgetit; 206 if (i > 10) 207 c = sc->sc_mask; /* Fooling interrupt */ 208 else if (c == 0) 209 goto forgetit; 210 211 *sc->sc_intmsk = c; 212 DELAY(100); 213 *sc->sc_intmsk = 0; 214 va.va_maskno = ffs((u_int)c); 215 i = scb_vecref(&vec, &br); 216 if (i == 0) 217 goto fail; 218 if (vec == 0) 219 goto fail; 220 221 va.va_br = br; 222 va.va_cvec = vec; 223 va.va_dmaaddr = sc->sc_dmaaddr; 224 va.va_dmasize = sc->sc_dmasize; 225 *sc->sc_intmsk = c; /* Allow interrupts during attach */ 226 config_attach(parent, cf, &va, vsbus_print); 227 *sc->sc_intmsk = 0; 228 return 0; 229 230 fail: 231 printf("%s%d at %s csr 0x%x %s\n", 232 cf->cf_name, cf->cf_unit, device_xname(parent), 233 cf->cf_loc[VSBUSCF_CSR], (i ? "zero vector" : "didn't interrupt")); 234 forgetit: 235 return 0; 236 } 237 238 /* 239 * Sets a new interrupt mask. Returns the old one. 240 * Works like spl functions. 241 */ 242 unsigned char 243 vsbus_setmask(int mask) 244 { 245 struct vsbus_softc * const sc = device_lookup_private(&vsbus_cd, 0); 246 unsigned char ch; 247 248 if (sc == NULL) 249 return 0; 250 251 ch = *sc->sc_intmsk; 252 *sc->sc_intmsk = mask; 253 return ch; 254 } 255 256 /* 257 * Clears the interrupts in mask. 258 */ 259 void 260 vsbus_clrintr(int mask) 261 { 262 struct vsbus_softc * const sc = device_lookup_private(&vsbus_cd, 0); 263 if (sc == NULL) 264 return; 265 266 *sc->sc_intclr = mask; 267 } 268 269 /* 270 * Copy data from/to a user process' space from the DMA area. 271 * Use the physical memory directly. 272 */ 273 void 274 vsbus_copytoproc(struct proc *p, void *fromv, void *tov, int len) 275 { 276 char *from = fromv, *to = tov; 277 struct pte *pte; 278 paddr_t pa; 279 280 if ((vaddr_t)to & KERNBASE) { /* In kernel space */ 281 memcpy(to, from, len); 282 return; 283 } 284 285 #ifdef DIAGNOSTIC 286 if (p == NULL) 287 panic("vsbus_copytoproc: no proc"); 288 #endif 289 290 if ((vaddr_t)to & 0x40000000) 291 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[vax_btop((vaddr_t)to & ~0x40000000)]; 292 else 293 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[vax_btop((vaddr_t)to)]; 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, min(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, min(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 pte *pte; 319 paddr_t pa; 320 321 if ((vaddr_t)from & KERNBASE) { /* In kernel space */ 322 memcpy(to, from, len); 323 return; 324 } 325 326 #ifdef DIAGNOSTIC 327 if (p == NULL) 328 panic("vsbus_copyfromproc: no proc"); 329 #endif 330 331 if ((vaddr_t)from & 0x40000000) 332 pte = &p->p_vmspace->vm_map.pmap->pm_p1br[vax_btop((vaddr_t)from & ~0x40000000)]; 333 else 334 pte = &p->p_vmspace->vm_map.pmap->pm_p0br[vax_btop((vaddr_t)from)]; 335 if ((vaddr_t)from & PGOFSET) { 336 int cz = round_page((vaddr_t)from) - (vaddr_t)from; 337 338 pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; 339 memcpy(to, (void *)pa, min(cz, len)); 340 from += cz; 341 to += cz; 342 len -= cz; 343 pte += 8; /* XXX */ 344 } 345 while (len > 0) { 346 pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; 347 memcpy(to, (void *)pa, min(PAGE_SIZE, len)); 348 from += PAGE_SIZE; 349 to += PAGE_SIZE; 350 len -= PAGE_SIZE; 351 pte += 8; /* XXX */ 352 } 353 } 354 355 /* 356 * There can only be one user of the DMA area on VS2k/VS3100 at one 357 * time, so keep track of it here. 358 */ 359 static int vsbus_active = 0; 360 361 void 362 vsbus_dma_start(struct vsbus_dma *vd) 363 { 364 365 SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q); 366 367 if (vsbus_active == 0) 368 vsbus_dma_intr(); 369 } 370 371 void 372 vsbus_dma_intr(void) 373 { 374 struct vsbus_dma *vd; 375 376 vd = SIMPLEQ_FIRST(&vsbus_dma); 377 if (vd == NULL) { 378 vsbus_active = 0; 379 return; 380 } 381 vsbus_active = 1; 382 SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd_q); 383 (*vd->vd_go)(vd->vd_arg); 384 } 385 386