if_le_ioasic.c revision 1.26
1 /* $NetBSD: if_le_ioasic.c,v 1.26 2006/03/30 18:18:39 thorpej 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> 35 __KERNEL_RCSID(0, "$NetBSD: if_le_ioasic.c,v 1.26 2006/03/30 18:18:39 thorpej 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 struct le_ioasic_softc { 66 struct am7990_softc sc_am7990; /* glue to MI code */ 67 struct lereg1 *sc_r1; /* LANCE registers */ 68 /* XXX must match with le_softc of if_levar.h XXX */ 69 70 bus_dma_tag_t sc_dmat; /* bus dma tag */ 71 bus_dmamap_t sc_dmamap; /* bus dmamap */ 72 }; 73 74 static int le_ioasic_match(struct device *, struct cfdata *, void *); 75 static void le_ioasic_attach(struct device *, struct device *, void *); 76 77 CFATTACH_DECL(le_ioasic, sizeof(struct le_softc), 78 le_ioasic_match, le_ioasic_attach, NULL, NULL); 79 80 static void le_ioasic_copytobuf_gap2(struct lance_softc *, void *, int, int); 81 static void le_ioasic_copyfrombuf_gap2(struct lance_softc *, void *, int, int); 82 static void le_ioasic_copytobuf_gap16(struct lance_softc *, void *, int, int); 83 static void le_ioasic_copyfrombuf_gap16(struct lance_softc *, void *, 84 int, int); 85 static void le_ioasic_zerobuf_gap16(struct lance_softc *, int, int); 86 87 static int 88 le_ioasic_match(parent, match, aux) 89 struct device *parent; 90 struct cfdata *match; 91 void *aux; 92 { 93 struct ioasicdev_attach_args *d = aux; 94 95 if (strncmp("PMAD-BA ", d->iada_modname, TC_ROM_LLEN) != 0) 96 return 0; 97 98 return 1; 99 } 100 101 /* IOASIC LANCE DMA needs 128KB boundary aligned 128KB chunk */ 102 #define LE_IOASIC_MEMSIZE (128*1024) 103 #define LE_IOASIC_MEMALIGN (128*1024) 104 105 static void 106 le_ioasic_attach(parent, self, aux) 107 struct device *parent, *self; 108 void *aux; 109 { 110 struct le_ioasic_softc *sc = device_private(self); 111 struct ioasicdev_attach_args *d = aux; 112 struct lance_softc *le = &sc->sc_am7990.lsc; 113 struct ioasic_softc *iosc = device_private(parent); 114 bus_space_tag_t ioasic_bst; 115 bus_space_handle_t ioasic_bsh; 116 bus_dma_tag_t dmat; 117 bus_dma_segment_t seg; 118 tc_addr_t tca; 119 u_int32_t ssr; 120 int rseg; 121 caddr_t le_iomem; 122 123 ioasic_bst = iosc->sc_bst; 124 ioasic_bsh = iosc->sc_bsh; 125 dmat = sc->sc_dmat = iosc->sc_dmat; 126 /* 127 * Allocate a DMA area for the chip. 128 */ 129 if (bus_dmamem_alloc(dmat, LE_IOASIC_MEMSIZE, LE_IOASIC_MEMALIGN, 130 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) { 131 printf("can't allocate DMA area for LANCE\n"); 132 return; 133 } 134 if (bus_dmamem_map(dmat, &seg, rseg, LE_IOASIC_MEMSIZE, 135 &le_iomem, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) { 136 printf("can't map DMA area for LANCE\n"); 137 bus_dmamem_free(dmat, &seg, rseg); 138 return; 139 } 140 /* 141 * Create and load the DMA map for the DMA area. 142 */ 143 if (bus_dmamap_create(dmat, LE_IOASIC_MEMSIZE, 1, 144 LE_IOASIC_MEMSIZE, 0, BUS_DMA_NOWAIT, &sc->sc_dmamap)) { 145 printf("can't create DMA map\n"); 146 goto bad; 147 } 148 if (bus_dmamap_load(dmat, sc->sc_dmamap, 149 le_iomem, LE_IOASIC_MEMSIZE, NULL, BUS_DMA_NOWAIT)) { 150 printf("can't load DMA map\n"); 151 goto bad; 152 } 153 /* 154 * Bind 128KB buffer with IOASIC DMA. 155 */ 156 tca = IOASIC_DMA_ADDR(sc->sc_dmamap->dm_segs[0].ds_addr); 157 bus_space_write_4(ioasic_bst, ioasic_bsh, IOASIC_LANCE_DMAPTR, tca); 158 ssr = bus_space_read_4(ioasic_bst, ioasic_bsh, IOASIC_CSR); 159 ssr |= IOASIC_CSR_DMAEN_LANCE; 160 bus_space_write_4(ioasic_bst, ioasic_bsh, IOASIC_CSR, ssr); 161 162 sc->sc_r1 = (struct lereg1 *) 163 TC_DENSE_TO_SPARSE(TC_PHYS_TO_UNCACHED(d->iada_addr)); 164 le->sc_mem = (void *)TC_PHYS_TO_UNCACHED(le_iomem); 165 le->sc_copytodesc = le_ioasic_copytobuf_gap2; 166 le->sc_copyfromdesc = le_ioasic_copyfrombuf_gap2; 167 le->sc_copytobuf = le_ioasic_copytobuf_gap16; 168 le->sc_copyfrombuf = le_ioasic_copyfrombuf_gap16; 169 le->sc_zerobuf = le_ioasic_zerobuf_gap16; 170 171 dec_le_common_attach(&sc->sc_am7990, 172 (u_char *)iosc->sc_base + IOASIC_SLOT_2_START); 173 174 ioasic_intr_establish(parent, d->iada_cookie, TC_IPL_NET, 175 am7990_intr, sc); 176 return; 177 178 bad: 179 bus_dmamem_unmap(dmat, le_iomem, LE_IOASIC_MEMSIZE); 180 bus_dmamem_free(dmat, &seg, rseg); 181 } 182 183 /* 184 * Special memory access functions needed by ioasic-attached LANCE 185 * chips. 186 */ 187 188 /* 189 * gap2: two bytes of data followed by two bytes of pad. 190 * 191 * Buffers must be 4-byte aligned. The code doesn't worry about 192 * doing an extra byte. 193 */ 194 195 void 196 le_ioasic_copytobuf_gap2(sc, fromv, boff, len) 197 struct lance_softc *sc; 198 void *fromv; 199 int boff; 200 int len; 201 { 202 volatile caddr_t buf = sc->sc_mem; 203 caddr_t from = fromv; 204 volatile u_int16_t *bptr; 205 206 if (boff & 0x1) { 207 /* handle unaligned first byte */ 208 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 209 *bptr = (*from++ << 8) | (*bptr & 0xff); 210 bptr += 2; 211 len--; 212 } else 213 bptr = ((volatile u_int16_t *)buf) + boff; 214 while (len > 1) { 215 *bptr = (from[1] << 8) | (from[0] & 0xff); 216 bptr += 2; 217 from += 2; 218 len -= 2; 219 } 220 if (len == 1) 221 *bptr = (u_int16_t)*from; 222 } 223 224 void 225 le_ioasic_copyfrombuf_gap2(sc, tov, boff, len) 226 struct lance_softc *sc; 227 void *tov; 228 int boff, len; 229 { 230 volatile caddr_t buf = sc->sc_mem; 231 caddr_t to = tov; 232 volatile u_int16_t *bptr; 233 u_int16_t tmp; 234 235 if (boff & 0x1) { 236 /* handle unaligned first byte */ 237 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 238 *to++ = (*bptr >> 8) & 0xff; 239 bptr += 2; 240 len--; 241 } else 242 bptr = ((volatile u_int16_t *)buf) + boff; 243 while (len > 1) { 244 tmp = *bptr; 245 *to++ = tmp & 0xff; 246 *to++ = (tmp >> 8) & 0xff; 247 bptr += 2; 248 len -= 2; 249 } 250 if (len == 1) 251 *to = *bptr & 0xff; 252 } 253 254 /* 255 * gap16: 16 bytes of data followed by 16 bytes of pad. 256 * 257 * Buffers must be 32-byte aligned. 258 */ 259 260 void 261 le_ioasic_copytobuf_gap16(sc, fromv, boff, len) 262 struct lance_softc *sc; 263 void *fromv; 264 int boff; 265 int len; 266 { 267 volatile caddr_t buf = sc->sc_mem; 268 caddr_t from = fromv; 269 caddr_t bptr; 270 271 bptr = buf + ((boff << 1) & ~0x1f); 272 boff &= 0xf; 273 274 /* 275 * Dispose of boff so destination of subsequent copies is 276 * 16-byte aligned. 277 */ 278 if (boff) { 279 int xfer; 280 xfer = min(len, 16 - boff); 281 bcopy(from, bptr + boff, xfer); 282 from += xfer; 283 bptr += 32; 284 len -= xfer; 285 } 286 287 /* Destination of copies is now 16-byte aligned. */ 288 if (len >= 16) 289 switch ((u_long)from & (sizeof(u_int32_t) -1)) { 290 case 2: 291 /* Ethernet headers make this the dominant case. */ 292 do { 293 u_int32_t *dst = (u_int32_t*)bptr; 294 u_int16_t t0; 295 u_int32_t t1, t2, t3, t4; 296 297 /* read from odd-16-bit-aligned, cached src */ 298 t0 = *(u_int16_t*)from; 299 t1 = *(u_int32_t*)(from+2); 300 t2 = *(u_int32_t*)(from+6); 301 t3 = *(u_int32_t*)(from+10); 302 t4 = *(u_int16_t*)(from+14); 303 304 /* DMA buffer is uncached on mips */ 305 dst[0] = t0 | (t1 << 16); 306 dst[1] = (t1 >> 16) | (t2 << 16); 307 dst[2] = (t2 >> 16) | (t3 << 16); 308 dst[3] = (t3 >> 16) | (t4 << 16); 309 310 from += 16; 311 bptr += 32; 312 len -= 16; 313 } while (len >= 16); 314 break; 315 316 case 0: 317 do { 318 u_int32_t *src = (u_int32_t*)from; 319 u_int32_t *dst = (u_int32_t*)bptr; 320 u_int32_t t0, t1, t2, t3; 321 322 t0 = src[0]; t1 = src[1]; t2 = src[2]; t3 = src[3]; 323 dst[0] = t0; dst[1] = t1; dst[2] = t2; dst[3] = t3; 324 325 from += 16; 326 bptr += 32; 327 len -= 16; 328 } while (len >= 16); 329 break; 330 331 default: 332 /* Does odd-aligned case ever happen? */ 333 do { 334 bcopy(from, bptr, 16); 335 from += 16; 336 bptr += 32; 337 len -= 16; 338 } while (len >= 16); 339 break; 340 } 341 if (len) 342 bcopy(from, bptr, len); 343 } 344 345 void 346 le_ioasic_copyfrombuf_gap16(sc, tov, boff, len) 347 struct lance_softc *sc; 348 void *tov; 349 int boff, len; 350 { 351 volatile caddr_t buf = sc->sc_mem; 352 caddr_t to = tov; 353 caddr_t bptr; 354 355 bptr = buf + ((boff << 1) & ~0x1f); 356 boff &= 0xf; 357 358 /* Dispose of boff. source of copy is subsequently 16-byte aligned. */ 359 if (boff) { 360 int xfer; 361 xfer = min(len, 16 - boff); 362 bcopy(bptr+boff, to, xfer); 363 to += xfer; 364 bptr += 32; 365 len -= xfer; 366 } 367 if (len >= 16) 368 switch ((u_long)to & (sizeof(u_int32_t) -1)) { 369 case 2: 370 /* 371 * to is aligned to an odd 16-bit boundary. Ethernet headers 372 * make this the dominant case (98% or more). 373 */ 374 do { 375 u_int32_t *src = (u_int32_t*)bptr; 376 u_int32_t t0, t1, t2, t3; 377 378 /* read from uncached aligned DMA buf */ 379 t0 = src[0]; t1 = src[1]; t2 = src[2]; t3 = src[3]; 380 381 /* write to odd-16-bit-word aligned dst */ 382 *(u_int16_t *) (to+0) = (u_short) t0; 383 *(u_int32_t *) (to+2) = (t0 >> 16) | (t1 << 16); 384 *(u_int32_t *) (to+6) = (t1 >> 16) | (t2 << 16); 385 *(u_int32_t *) (to+10) = (t2 >> 16) | (t3 << 16); 386 *(u_int16_t *) (to+14) = (t3 >> 16); 387 bptr += 32; 388 to += 16; 389 len -= 16; 390 } while (len > 16); 391 break; 392 case 0: 393 /* 32-bit aligned aligned copy. Rare. */ 394 do { 395 u_int32_t *src = (u_int32_t*)bptr; 396 u_int32_t *dst = (u_int32_t*)to; 397 u_int32_t t0, t1, t2, t3; 398 399 t0 = src[0]; t1 = src[1]; t2 = src[2]; t3 = src[3]; 400 dst[0] = t0; dst[1] = t1; dst[2] = t2; dst[3] = t3; 401 to += 16; 402 bptr += 32; 403 len -= 16; 404 } while (len > 16); 405 break; 406 407 /* XXX Does odd-byte-aligned case ever happen? */ 408 default: 409 do { 410 bcopy(bptr, to, 16); 411 to += 16; 412 bptr += 32; 413 len -= 16; 414 } while (len > 16); 415 break; 416 } 417 if (len) 418 bcopy(bptr, to, len); 419 } 420 421 void 422 le_ioasic_zerobuf_gap16(sc, boff, len) 423 struct lance_softc *sc; 424 int boff, len; 425 { 426 volatile caddr_t buf = sc->sc_mem; 427 caddr_t bptr; 428 int xfer; 429 430 bptr = buf + ((boff << 1) & ~0x1f); 431 boff &= 0xf; 432 xfer = min(len, 16 - boff); 433 while (len > 0) { 434 bzero(bptr + boff, xfer); 435 bptr += 32; 436 boff = 0; 437 len -= xfer; 438 xfer = min(len, 16); 439 } 440 } 441
Indexes created Tue Sep 30 07:10:03 GMT 2025