if_le_ioasic.c revision 1.15
1 /* $NetBSD: if_le_ioasic.c,v 1.15 2000/03/30 12:45:43 augustss Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Author: Chris G. Demetriou 8 * 9 * Permission to use, copy, modify and distribute this software and 10 * its documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie the 27 * rights to redistribute these changes. 28 */ 29 30 /* 31 * LANCE on DEC IOCTL ASIC. 32 */ 33 34 #include <sys/cdefs.h> /* RCS ID & macro defns */ 35 __KERNEL_RCSID(0, "$NetBSD: if_le_ioasic.c,v 1.15 2000/03/30 12:45:43 augustss Exp $"); 36 37 #include "opt_inet.h" 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/mbuf.h> 42 #include <sys/syslog.h> 43 #include <sys/socket.h> 44 #include <sys/device.h> 45 46 #include <net/if.h> 47 #include <net/if_ether.h> 48 #include <net/if_media.h> 49 50 #ifdef INET 51 #include <netinet/in.h> 52 #include <netinet/if_inarp.h> 53 #endif 54 55 #include <dev/ic/lancereg.h> 56 #include <dev/ic/lancevar.h> 57 #include <dev/ic/am7990reg.h> 58 #include <dev/ic/am7990var.h> 59 60 #include <dev/tc/if_levar.h> 61 #include <dev/tc/tcvar.h> 62 #include <dev/tc/ioasicreg.h> 63 #include <dev/tc/ioasicvar.h> 64 65 #if defined(_KERNEL) && !defined(_LKM) 66 #include "opt_ddb.h" 67 #endif 68 69 caddr_t le_iomem; 70 71 static int le_ioasic_match __P((struct device *, struct cfdata *, void *)); 72 static void le_ioasic_attach __P((struct device *, struct device *, void *)); 73 74 struct cfattach le_ioasic_ca = { 75 sizeof(struct le_softc), le_ioasic_match, le_ioasic_attach 76 }; 77 78 static void ioasic_lance_dma_setup __P((struct device *)); 79 static char *ioasic_lance_ether_address __P((void)); 80 81 #ifdef DDB 82 #define integrate 83 #define hide 84 #else 85 #define integrate static __inline 86 #define hide static 87 #endif 88 89 hide void le_ioasic_copytobuf_gap2 __P((struct lance_softc *, void *, 90 int, int)); 91 hide void le_ioasic_copyfrombuf_gap2 __P((struct lance_softc *, void *, 92 int, int)); 93 94 hide void le_ioasic_copytobuf_gap16 __P((struct lance_softc *, void *, 95 int, int)); 96 hide void le_ioasic_copyfrombuf_gap16 __P((struct lance_softc *, void *, 97 int, int)); 98 hide void le_ioasic_zerobuf_gap16 __P((struct lance_softc *, int, int)); 99 100 int 101 le_ioasic_match(parent, match, aux) 102 struct device *parent; 103 struct cfdata *match; 104 void *aux; 105 { 106 struct ioasicdev_attach_args *d = aux; 107 108 if (!ioasic_submatch(match, aux)) 109 return (0); 110 if (strncmp("lance", d->iada_modname, TC_ROM_LLEN)) 111 return (0); 112 113 return (1); 114 } 115 116 void 117 le_ioasic_attach(parent, self, aux) 118 struct device *parent, *self; 119 void *aux; 120 { 121 struct ioasicdev_attach_args *d = aux; 122 struct le_softc *lesc = (void *)self; 123 struct lance_softc *sc = &lesc->sc_am7990.lsc; 124 125 ioasic_lance_dma_setup(parent); 126 127 if (le_iomem == 0) { 128 printf("%s: DMA area not set up\n", sc->sc_dev.dv_xname); 129 return; 130 } 131 132 lesc->sc_r1 = (struct lereg1 *) 133 TC_DENSE_TO_SPARSE(TC_PHYS_TO_UNCACHED(d->iada_addr)); 134 sc->sc_mem = (void *)TC_PHYS_TO_UNCACHED(le_iomem); 135 136 sc->sc_copytodesc = le_ioasic_copytobuf_gap2; 137 sc->sc_copyfromdesc = le_ioasic_copyfrombuf_gap2; 138 sc->sc_copytobuf = le_ioasic_copytobuf_gap16; 139 sc->sc_copyfrombuf = le_ioasic_copyfrombuf_gap16; 140 sc->sc_zerobuf = le_ioasic_zerobuf_gap16; 141 142 dec_le_common_attach(&lesc->sc_am7990, ioasic_lance_ether_address()); 143 144 ioasic_intr_establish(parent, d->iada_cookie, TC_IPL_NET, 145 am7990_intr, sc); 146 } 147 148 /* 149 * Special memory access functions needed by ioasic-attached LANCE 150 * chips. 151 */ 152 153 /* 154 * gap2: two bytes of data followed by two bytes of pad. 155 * 156 * Buffers must be 4-byte aligned. The code doesn't worry about 157 * doing an extra byte. 158 */ 159 160 void 161 le_ioasic_copytobuf_gap2(sc, fromv, boff, len) 162 struct lance_softc *sc; 163 void *fromv; 164 int boff; 165 int len; 166 { 167 volatile caddr_t buf = sc->sc_mem; 168 caddr_t from = fromv; 169 volatile u_int16_t *bptr; 170 171 if (boff & 0x1) { 172 /* handle unaligned first byte */ 173 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 174 *bptr = (*from++ << 8) | (*bptr & 0xff); 175 bptr += 2; 176 len--; 177 } else 178 bptr = ((volatile u_int16_t *)buf) + boff; 179 while (len > 1) { 180 *bptr = (from[1] << 8) | (from[0] & 0xff); 181 bptr += 2; 182 from += 2; 183 len -= 2; 184 } 185 if (len == 1) 186 *bptr = (u_int16_t)*from; 187 } 188 189 void 190 le_ioasic_copyfrombuf_gap2(sc, tov, boff, len) 191 struct lance_softc *sc; 192 void *tov; 193 int boff, len; 194 { 195 volatile caddr_t buf = sc->sc_mem; 196 caddr_t to = tov; 197 volatile u_int16_t *bptr; 198 u_int16_t tmp; 199 200 if (boff & 0x1) { 201 /* handle unaligned first byte */ 202 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 203 *to++ = (*bptr >> 8) & 0xff; 204 bptr += 2; 205 len--; 206 } else 207 bptr = ((volatile u_int16_t *)buf) + boff; 208 while (len > 1) { 209 tmp = *bptr; 210 *to++ = tmp & 0xff; 211 *to++ = (tmp >> 8) & 0xff; 212 bptr += 2; 213 len -= 2; 214 } 215 if (len == 1) 216 *to = *bptr & 0xff; 217 } 218 219 /* 220 * gap16: 16 bytes of data followed by 16 bytes of pad. 221 * 222 * Buffers must be 32-byte aligned. 223 */ 224 225 void 226 le_ioasic_copytobuf_gap16(sc, fromv, boff, len) 227 struct lance_softc *sc; 228 void *fromv; 229 int boff; 230 int len; 231 { 232 volatile caddr_t buf = sc->sc_mem; 233 caddr_t from = fromv; 234 caddr_t bptr; 235 236 bptr = buf + ((boff << 1) & ~0x1f); 237 boff &= 0xf; 238 239 /* 240 * Dispose of boff so destination of subsequent copies is 241 * 16-byte aligned. 242 */ 243 if (boff) { 244 int xfer; 245 xfer = min(len, 16 - boff); 246 bcopy(from, bptr + boff, xfer); 247 from += xfer; 248 bptr += 32; 249 len -= xfer; 250 } 251 252 /* Destination of copies is now 16-byte aligned. */ 253 if (len >= 16) 254 switch ((u_long)from & (sizeof(u_int32_t) -1)) { 255 case 2: 256 /* Ethernet headers make this the dominant case. */ 257 do { 258 u_int32_t *dst = (u_int32_t*)bptr; 259 u_int16_t t0; 260 u_int32_t t1, t2, t3, t4; 261 262 /* read from odd-16-bit-aligned, cached src */ 263 t0 = *(u_int16_t*)from; 264 t1 = *(u_int32_t*)(from+2); 265 t2 = *(u_int32_t*)(from+6); 266 t3 = *(u_int32_t*)(from+10); 267 t4 = *(u_int16_t*)(from+14); 268 269 /* DMA buffer is uncached on mips */ 270 dst[0] = t0 | (t1 << 16); 271 dst[1] = (t1 >> 16) | (t2 << 16); 272 dst[2] = (t2 >> 16) | (t3 << 16); 273 dst[3] = (t3 >> 16) | (t4 << 16); 274 275 from += 16; 276 bptr += 32; 277 len -= 16; 278 } while (len >= 16); 279 break; 280 281 case 0: 282 do { 283 u_int32_t *src = (u_int32_t*)from; 284 u_int32_t *dst = (u_int32_t*)bptr; 285 u_int32_t t0, t1, t2, t3; 286 287 t0 = src[0]; t1 = src[1]; t2 = src[2]; t3 = src[3]; 288 dst[0] = t0; dst[1] = t1; dst[2] = t2; dst[3] = t3; 289 290 from += 16; 291 bptr += 32; 292 len -= 16; 293 } while (len >= 16); 294 break; 295 296 default: 297 /* Does odd-aligned case ever happen? */ 298 do { 299 bcopy(from, bptr, 16); 300 from += 16; 301 bptr += 32; 302 len -= 16; 303 } while (len >= 16); 304 break; 305 } 306 if (len) 307 bcopy(from, bptr, len); 308 } 309 310 void 311 le_ioasic_copyfrombuf_gap16(sc, tov, boff, len) 312 struct lance_softc *sc; 313 void *tov; 314 int boff, len; 315 { 316 volatile caddr_t buf = sc->sc_mem; 317 caddr_t to = tov; 318 caddr_t bptr; 319 320 bptr = buf + ((boff << 1) & ~0x1f); 321 boff &= 0xf; 322 323 /* Dispose of boff. source of copy is subsequently 16-byte aligned. */ 324 if (boff) { 325 int xfer; 326 xfer = min(len, 16 - boff); 327 bcopy(bptr+boff, to, xfer); 328 to += xfer; 329 bptr += 32; 330 len -= xfer; 331 } 332 if (len >= 16) 333 switch ((u_long)to & (sizeof(u_int32_t) -1)) { 334 case 2: 335 /* 336 * to is aligned to an odd 16-bit boundary. Ethernet headers 337 * make this the dominant case (98% or more). 338 */ 339 do { 340 u_int32_t *src = (u_int32_t*)bptr; 341 u_int32_t t0, t1, t2, t3; 342 343 /* read from uncached aligned DMA buf */ 344 t0 = src[0]; t1 = src[1]; t2 = src[2]; t3 = src[3]; 345 346 /* write to odd-16-bit-word aligned dst */ 347 *(u_int16_t *) (to+0) = (u_short) t0; 348 *(u_int32_t *) (to+2) = (t0 >> 16) | (t1 << 16); 349 *(u_int32_t *) (to+6) = (t1 >> 16) | (t2 << 16); 350 *(u_int32_t *) (to+10) = (t2 >> 16) | (t3 << 16); 351 *(u_int16_t *) (to+14) = (t3 >> 16); 352 bptr += 32; 353 to += 16; 354 len -= 16; 355 } while (len > 16); 356 break; 357 case 0: 358 /* 32-bit aligned aligned copy. Rare. */ 359 do { 360 u_int32_t *src = (u_int32_t*)bptr; 361 u_int32_t *dst = (u_int32_t*)to; 362 u_int32_t t0, t1, t2, t3; 363 364 t0 = src[0]; t1 = src[1]; t2 = src[2]; t3 = src[3]; 365 dst[0] = t0; dst[1] = t1; dst[2] = t2; dst[3] = t3; 366 to += 16; 367 bptr += 32; 368 len -= 16; 369 } while (len > 16); 370 break; 371 372 /* XXX Does odd-byte-aligned case ever happen? */ 373 default: 374 do { 375 bcopy(bptr, to, 16); 376 to += 16; 377 bptr += 32; 378 len -= 16; 379 } while (len > 16); 380 break; 381 } 382 if (len) 383 bcopy(bptr, to, len); 384 } 385 386 void 387 le_ioasic_zerobuf_gap16(sc, boff, len) 388 struct lance_softc *sc; 389 int boff, len; 390 { 391 volatile caddr_t buf = sc->sc_mem; 392 caddr_t bptr; 393 int xfer; 394 395 bptr = buf + ((boff << 1) & ~0x1f); 396 boff &= 0xf; 397 xfer = min(len, 16 - boff); 398 while (len > 0) { 399 bzero(bptr + boff, xfer); 400 bptr += 32; 401 boff = 0; 402 len -= xfer; 403 xfer = min(len, 16); 404 } 405 } 406 407 #define LE_IOASIC_MEMSIZE (128*1024) 408 #define LE_IOASIC_MEMALIGN (128*1024) 409 410 void 411 ioasic_lance_dma_setup(parent) 412 struct device *parent; 413 { 414 struct ioasic_softc *sc = (void *)parent; 415 bus_dma_tag_t dmat = sc->sc_dmat; 416 bus_dma_segment_t seg; 417 tc_addr_t tca; 418 u_int32_t ssr; 419 int rseg; 420 421 /* 422 * Allocate a DMA area for the chip. 423 */ 424 if (bus_dmamem_alloc(dmat, LE_IOASIC_MEMSIZE, LE_IOASIC_MEMALIGN, 425 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) { 426 printf("%s: can't allocate DMA area for LANCE\n", 427 sc->sc_dv.dv_xname); 428 return; 429 } 430 if (bus_dmamem_map(dmat, &seg, rseg, LE_IOASIC_MEMSIZE, 431 &le_iomem, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) { 432 printf("%s: can't map DMA area for LANCE\n", 433 sc->sc_dv.dv_xname); 434 bus_dmamem_free(dmat, &seg, rseg); 435 return; 436 } 437 438 /* 439 * Create and load the DMA map for the DMA area. 440 */ 441 if (bus_dmamap_create(dmat, LE_IOASIC_MEMSIZE, 1, 442 LE_IOASIC_MEMSIZE, 0, BUS_DMA_NOWAIT, &sc->sc_lance_dmam)) { 443 printf("%s: can't create DMA map\n", sc->sc_dv.dv_xname); 444 goto bad; 445 } 446 if (bus_dmamap_load(dmat, sc->sc_lance_dmam, 447 le_iomem, LE_IOASIC_MEMSIZE, NULL, BUS_DMA_NOWAIT)) { 448 printf("%s: can't load DMA map\n", sc->sc_dv.dv_xname); 449 goto bad; 450 } 451 452 tca = (tc_addr_t)sc->sc_lance_dmam->dm_segs[0].ds_addr; 453 tca = ((tca << 3) & ~0x1f) | ((tca >> 29) & 0x1f); 454 bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_LANCE_DMAPTR, tca); 455 ssr = bus_space_read_4(sc->sc_bst, sc->sc_bsh, IOASIC_CSR); 456 ssr |= IOASIC_CSR_DMAEN_LANCE; 457 bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_CSR, ssr); 458 return; 459 460 bad: 461 bus_dmamem_unmap(dmat, le_iomem, LE_IOASIC_MEMSIZE); 462 bus_dmamem_free(dmat, &seg, rseg); 463 le_iomem = 0; 464 } 465 466 /* XXX */ 467 char * 468 ioasic_lance_ether_address() 469 { 470 471 return (char *)(ioasic_base + IOASIC_SLOT_2_START); 472 } 473
Indexes created Tue Sep 30 07:10:03 GMT 2025